61 results on '"Demir, B"'
Search Results
2. Self-Aligning Nanojunctions for Integrated Single-Molecule Circuits
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Liu, B., Gultakti, C.A., Marrs, J., Gong, Y., Oren, E.E., Li, R., Demir, B., Liu, B., Gultakti, C.A., Marrs, J., Gong, Y., Oren, E.E., Li, R., and Demir, B.
- Abstract
Robust, high-yield integration of nanoscale components such as graphene nanoribbons, nanoparticles, or single-molecules with conventional electronic circuits has proven to be challenging. This difficulty arises because the contacts to these nanoscale devices must be precisely fabricated with angstrom-level resolution to make reliable connections, and at manufacturing scales this cannot be achieved with even the highest-resolution lithographic tools. Here we introduce an approach that circumvents this issue by precisely creating nanometer-scale gaps between metallic carbon electrodes by using a self-aligning, solution-phase process, which allows facile integration with conventional electronic systems with yields approaching 50%. The electrode separation is controlled by covalently binding metallic single-walled carbon nanotube (mCNT) electrodes to individual DNA duplexes to create mCNT-DNA-mCNT nanojunctions, where the gap is precisely matched to the DNA length. These junctions are then integrated with top-down lithographic techniques to create single-molecule circuits that have electronic properties dominated by the DNA in the junction, have reproducible conductance values with low dispersion, and are stable and robust enough to be utilized as active, high-specificity electronic biosensors for dynamic single-molecule detection of specific oligonucleotides, such as those related to the SARS-CoV-2 genome. This scalable approach for high-yield integration of nanometer-scale devices will enable opportunities for manufacturing of hybrid electronic systems for a wide range of applications. © 2024 American Chemical Society., NSF-2036865/2328217; W. M. Keck Foundation, WMKF
- Published
- 2024
3. Self-Aligning Nanojunctions for Integrated Single-Molecule Circuits
- Author
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Demir,B., Gultakti,C.A., Marrs,J., Gong,Y., Li,R., Hihath,J., Liu,B., Demir,B., Gultakti,C.A., Marrs,J., Gong,Y., Li,R., Hihath,J., and Liu,B.
- Abstract
Robust, high-yield integration of nanoscale components such as graphene nanoribbons, nanoparticles, or single-molecules with conventional electronic circuits has proven to be challenging. This difficulty arises because the contacts to these nanoscale devices must be precisely fabricated with angstrom-level resolution to make reliable connections, and at manufacturing scales this cannot be achieved with even the highest-resolution lithographic tools. Here we introduce an approach that circumvents this issue by precisely creating nanometer-scale gaps between metallic carbon electrodes by using a self-aligning, solution-phase process, which allows facile integration with conventional electronic systems with yields approaching 50%. The electrode separation is controlled by covalently binding metallic single-walled carbon nanotube (mCNT) electrodes to individual DNA duplexes to create mCNT-DNA-mCNT nanojunctions, where the gap is precisely matched to the DNA length. These junctions are then integrated with top-down lithographic techniques to create single-molecule circuits that have electronic properties dominated by the DNA in the junction, have reproducible conductance values with low dispersion, and are stable and robust enough to be utilized as active, high-specificity electronic biosensors for dynamic single-molecule detection of specific oligonucleotides, such as those related to the SARS-CoV-2 genome. This scalable approach for high-yield integration of nanometer-scale devices will enable opportunities for manufacturing of hybrid electronic systems for a wide range of applications. © 2024 American Chemical Society., National Science Foundation Future Manufacturing Program, (NSF-2036865/2328217); W. M. Keck Foundation, WMKF
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- 2024
4. P824 Association between visceral adipose tissue and disease duration, clinical activity, and response to various biological agents in inflammatory bowel disease
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Karakan, T, primary, Coşkun, M, additional, Bilican, G, additional, Demir, B, additional, Karataş, A, additional, Ekmen, N, additional, Moral, K, additional, Karakoç, A, additional, and Cindoruk, M, additional
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- 2024
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5. Coriorretinopatía serosa central ampollosa fibrinosa con desprendimiento de retina exudativo
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Arun, K., Demir, B., and Makuloluwa, A.
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- 2024
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6. Fibrinous bullous central serous chorioretinopathy with exudative retinal detachment
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Arun, K., Demir, B., and Makuloluwa, A.
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- 2024
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7. LifeNet: Mission set for Corpuls
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Geale, A., Coote, E., Meere, W., Demir, B., Parkinson, J., Colgan, J., and Spina, R.
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- 2024
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8. Liver transplantation for nijmegen breakage syndrome with hepatic malignity and hepatopulmonary syndrome after bone marrow transplantation: a case report.
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Şal, O., Alim, A., Karataş, C., Demir, B., Erbey, M.F., Akbulut, A., Özden, Ö., and Kanmaz, T.
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- 2024
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9. Efficacy of everolimus plus hormonal treatment after cyclin-dependent kinase inhibitor; real-life experience, A TOG study.
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Beypınar İ, Demir H, Yaslıkaya Ş, Köşeci T, Demir B, Çolak G, Ağaoğlu AB, Şahbazlar M, Şancı PC, Çabuk D, Işık U, Şahin E, Coşkun A, Caner B, Aykut T, Artaç M, Duygulu ME, Sever N, Öksüz S, Turan N, Aykan MB, Tüzün EK, Uysal M, Uğurlu İ, Sakin A, Acar C, Özaşkın D, Şakalar T, Keskinkılıç M, Yavuzşen T, Köse N, Ertürk İ, Yıldırım N, Balçık OY, Alkan A, Selvi O, Erçin E, Ünal OÜ, and Karaçin C
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- Humans, Female, Middle Aged, Aged, Adult, Retrospective Studies, Purines administration & dosage, Purines adverse effects, Purines therapeutic use, Piperazines administration & dosage, Piperazines therapeutic use, Piperazines adverse effects, Aminopyridines administration & dosage, Aminopyridines therapeutic use, Treatment Outcome, Aged, 80 and over, Prognosis, Everolimus administration & dosage, Everolimus adverse effects, Everolimus therapeutic use, Antineoplastic Combined Chemotherapy Protocols therapeutic use, Antineoplastic Combined Chemotherapy Protocols adverse effects, Breast Neoplasms drug therapy, Breast Neoplasms pathology, Breast Neoplasms mortality, Protein Kinase Inhibitors therapeutic use, Protein Kinase Inhibitors adverse effects, Protein Kinase Inhibitors administration & dosage, Pyridines administration & dosage, Pyridines therapeutic use, Pyridines adverse effects
- Abstract
Purpose: In advanced breast cancer, endocrine therapy is preferred in the absence of visceral crisis. Cyclin-dependent kinase inhibitors (CDKi) are the gold standards. The selection of subsequent treatments after CDKi treatment is still controversial, and the efficacy of everolimus (EVE) combinations is unknown. In this study, we aimed to investigate the efficacy of EVE after CDKi administration in real-life experiences., Method: The study received data from 208 patients from 26 cancer centers. Demographic and histologic features, diagnosis, progression, last visit dates, and toxicities were recorded. This study was a retrospective case series., Results: One hundred and seven patients received palbociclib, while 101 patients received ribociclib as a CDKi. The overall response and disease control rates of EVE combinations were 60% and 88%, respectively. In univariate analysis, the absence of liver metastasis, age > 40 years, better type of response, and immediate treatment after CDKi were related to increased progression-free survival. Liver metastasis and response type were significantly associated with overall survival. In the multivariate analysis, response remained significant in terms of progression-free survival, while response type, liver metastatic disease, and hematologic toxicity were prognostic in terms of overall survival., Conclusion: This study provides evidence of the benefits of EVE combinations after CDKi treatment. EVE combinations may be more appropriate for patients with non-liver metastasis, and the first treatment response shows the benefit of treatment. In addition, immediate treatment after CDKi treatment is more beneficial than later lines of treatment., (© 2024. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
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- 2024
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10. Comparative analysis of laparoscopic Nissen fundoplication and Rossetti modification in gastroesophageal reflux disease: A focus on life-quality enhancement.
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Erol MF, Demir B, and Kayaoglu HA
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- Humans, Female, Male, Middle Aged, Adult, Treatment Outcome, Surveys and Questionnaires, Aged, Gastroesophageal Reflux surgery, Fundoplication methods, Quality of Life, Laparoscopy methods, Patient Satisfaction
- Abstract
Objective: This study aims to investigate the focus of surgical treatment of gastroesophageal reflux disease (GERD) on enhancing life quality beyond symptom relief. The comparison involves laparoscopic Nissen fundoplication and Rossetti modification techniques., Methods: Patients intolerant to or experiencing relapse after medical therapy underwent either standard Nissen procedure (Group 1, n = 61) or Rossetti modification (Group 2, n = 42). A disease-specific quality of life questionnaire for GERD was utilized for evaluating life quality preoperatively and 2 years postoperatively. Symptom scores and patient satisfaction were also assessed., Results: Preoperatively, groups were similar in symptom duration, hiatal hernia presence, and DeMeester scores (p = 0.127, p = 0.427, and 0.584, respectively). Both groups exhibited a statistically significant increase in life quality postoperatively (p < 0.001), with no significant intergroup difference. Symptoms decreased after both surgeries, except for dysphagia and bloating. Bloating significantly increased in both groups after surgery (p = 0.018 and p = 0.017, respectively), and dysphagia increased significantly only in Group 2 (p = 0.007). The surgery refusal rate was significantly higher in Group 2 for similar preoperative symptoms (p = 0.040)., Conclusion: Despite increased life quality scores, the combination of increased dysphagia and bloating in patients undergoing Rossetti modification resulted in a decreased satisfaction rate., (Copyright © 2024 Asian Surgical Association and Taiwan Society of Coloproctology. Published by Elsevier B.V. All rights reserved.)
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- 2024
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11. Maternal and foetal risks associated with teenage pregnancy - a comparative retrospective study in Turkey.
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Duran MN, Pek E, Demir SS, Karacaer KÖ, and Demir B
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- Humans, Female, Pregnancy, Adolescent, Retrospective Studies, Young Adult, Turkey epidemiology, Adult, Risk Factors, Pre-Eclampsia epidemiology, Marital Status statistics & numerical data, Educational Status, Pregnancy Complications epidemiology, Pregnancy in Adolescence statistics & numerical data, Smoking epidemiology, Smoking adverse effects, Pregnancy Outcome epidemiology
- Abstract
Background: Adolescent pregnancy is defined as pregnancy occurring in young women between the ages of 10 and 19 years. Adolescent pregnancies, which are among the social healthcare concerns in developed and developing countries, have negative effects on maternal and infant health. Pregnancy in adolescence puts the health of both the mother and child at risk, as adolescent pregnancies have higher rates of eclampsia, systemic infection, low birth weight, and preterm delivery compared to other pregnancies. In this study, the effects of education level, smoking, and marital status on maternal and foetal outcomes in adolescent pregnancies were evaluated., Methods: The records of a total of 960 pregnant women (480 pregnant adolescents aged 15-19 years and 480 pregnant adult women aged 20-26 years) were examined retrospectively. The demographic data of the groups and maternal and foetal outcomes of the pregnancies were compared. A logistic regression model was established as a statistical method for reducing confounding effects., Results: Unmarried women were statistically significantly more prevalent in the adolescent group (38.3% vs. 7.3%). Among the considered risk factors, preeclampsia (2.9% vs. 0.8%) and smoking (29.8% vs. 9.8%) were statistically significantly more common in the adolescent group. When the groups were compared in terms of risk factors in pregnancy, it was found that pregnancy in adolescence was associated with a 3.04-fold higher risk of smoking, 5.25-fold higher risk of being unmarried, 3.50-fold higher risk of preeclampsia, and 1.70-fold higher risk of intrauterine growth retardation (IUGR)., Conclusions: This study demonstrates an increased risk of preeclampsia, IUGR, and smoking during pregnancy in adolescent pregnant women. These findings can be used to identify adolescent pregnancies requiring specific assistance and to take measures to reduce the probability of adverse outcomes.
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- 2024
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12. Liver Transplantation for Nijmegen Breakage Syndrome With Hepatic Malignancy and Hepatopulmonary Syndrome After Bone Marrow Transplantation: A Case Report.
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Şal O, Erbey F, Armutlu A, Karasu G, Demir B, Kızılkan NU, Akbulut A, Kanmaz T, and Alim A
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- Humans, Adolescent, Female, Bone Marrow Transplantation adverse effects, Living Donors, Liver Transplantation, Liver Neoplasms surgery, Nijmegen Breakage Syndrome complications, Hepatopulmonary Syndrome surgery, Hepatopulmonary Syndrome etiology, Hepatopulmonary Syndrome therapy
- Abstract
Background: Nijmegen breakage syndrome (NBS) is an autosomal recessive DNA repair disorder that manifests through increased genomic instability, malignancy, and cellular and humoral immunodeficiencies. The prognosis for NBS patients is poor due to their increased susceptibility to fatal infections and lymphoproliferative malignancies. Currently, there is no specific treatment for NBS, though allogeneic hematopoietic stem cell transplantation (HSCT) has been performed and documented as case series to demonstrate the utility of transplantation., Methods: A 14-year-old girl with NBS and haploidentical HSCT from her older brother due to recurrent lung infection was referred for liver transplantation (LT) due to liver cirrhosis, hepatopulmonary syndrome (HPS), and suspicion of liver malignancy. It was decided to perform LT using the living donor who had previously donated for HSCT., Results: Living donor left lobe LT was successfully performed from her brother. The patient experienced no complications in the early postoperative period and was discharged on the seventh postoperative day. Pathological examination of extracted liver has shown "intermediate cell carcinoma" in two foci. After 1 year LT, the patient has had an uneventful course in terms of LT complications and infection, with minimal immunosuppression., Conclusions: NBS patients have an increased prevalence of malignancies, including primary hepatic malignancy, but most are managed medically or with limited resections. Transplantation in these patients can be curative for hepatic malignancy with a favorable safety profile., (© 2024 Wiley Periodicals LLC.)
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- 2024
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13. Imaging of Hypoxia in Liver Tumors With 18 F-FMISO PET Before Selective Internal Radiotherapy With 90 Y Microspheres.
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Soydal C, Demir B, Dursun E, Sutcu G, Celebioglu EC, Bilgic MS, and Kucuk NO
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- Humans, Male, Middle Aged, Aged, Carcinoma, Hepatocellular diagnostic imaging, Carcinoma, Hepatocellular radiotherapy, Female, Hypoxia diagnostic imaging, Liver Neoplasms diagnostic imaging, Liver Neoplasms radiotherapy, Microspheres, Positron-Emission Tomography, Yttrium Radioisotopes, Misonidazole analogs & derivatives
- Abstract
Abstract: Hypoxia is a known cause of resistance to radiotherapy and chemotherapy. Although there are multiple studies in external radiation therapies based on hypoxia PET, the effect of hypoxia in radioembolization is largely unknown. Here we present 2 cases of hepatocellular carcinoma patients from a prospective study with different lesion characteristics on pretreatment 18 F-FMISO PET and varying responses on 18 F-FDG PET., Competing Interests: Conflicts of interest and sources of funding: none declared., (Copyright © 2024 Wolters Kluwer Health, Inc. All rights reserved.)
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- 2024
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14. Cognitive impairment in epilepsy patients and its correlations.
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Arslan G and Demir B
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- Humans, Male, Female, Adult, Middle Aged, Young Adult, Depression etiology, Depression diagnosis, Aged, Anxiety etiology, Anxiety diagnosis, Comorbidity, Epilepsy complications, Epilepsy diagnosis, Cognitive Dysfunction etiology, Cognitive Dysfunction physiopathology, Cognitive Dysfunction diagnosis
- Abstract
Objective: Epilepsy is a severe disease in which seizures play the leading role. Striking clinical manifestations of the attacks take most of the attention of healthcare professionals. Apart from epilepsy itself, it is well known that epilepsy patients may also have psychiatric comorbidities. These disorders, such as anxiety and depression, are mostly thought to be related to epileptic seizures or antiepileptic medications. In clinical practice, cognitive impairment is another disrupted area of interest in epileptic patients. Our study aimed to detect this deterioration and its correlations with mood disorders and epileptic disease features such as seizure frequency and illness duration., Materials and Methods: After obtaining verbal and written consent, we enrolled 52 epilepsy patients in our study. A short demographic form indicating their gender, epileptic disease features, and medication usage information was completed for each patient. The Quick Mild Cognitive Impairment Screen (QMCI) test, the Hamilton Anxiety Rating Scale (Ham-A), and the Hospital Anxiety and Depression Scale (HADS) were applied by an experienced psychologist. Abnormal brain magnetic resonance imaging findings (e.g., encephalomalacia, large arachnoid cysts, a considerable amount of white matter gliotic lesions, neoplastic or vascular space-occupying lesions, hippocampal malformations), vitamin and electrolyte imbalances, other chronic diseases as well as thyroid dysfunction were considered as exclusion criteria since they might interfere with cognition. We excluded abnormalities to this extent because we wanted to acquire a homogenous sampling population without structural disadvantages. Thus, we could be able to determine slight changes in cognition properly., Results: We found decreased cognitive scores directly proportional to lower education level, higher seizure frequency, longer disease duration, generalized tonic-clonic (GTC) type of seizure, and antiepileptic polytherapy. Also, complying with the literature, a high frequency of depression was found in our study group. Interestingly, decreased anxiety levels of the patients were statistically related to higher seizure frequency, which may indicate adaptive mechanisms to frequent seizures. Finally, a multivariate regression analysis revealed a significant negative impact of GTC type of seizure on cognition., Conclusion: Epilepsy and epileptic seizures affect cognition negatively. Thus, newly diagnosed epilepsy patients should be assessed for cognitive status as soon as possible. This assessment will allow epileptologists to understand future deteriorations in their patients' cognition. In our study, it is shown that QMCI is an effective and practical way to assess the cognitive statuses of epilepsy patients.
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- 2024
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15. What Are the Contraindications, if Any, for the Use of Tranexamic Acid During Knee or Hip Arthroplasty?
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Enayatollahi M, Azboy I, Dietz MJ, Aunon A, Heshmat R, Dragosloveanu S, Ehsani A, Scheau C, Shafiee G, Ghamgosar A, Çetin H, Demir B, and Palmer A
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- 2024
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16. Reply to Letter to the Editor: "Management of Ventricular Pseudoaneurysms".
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Şaşmaz Mİ, Demir B, Uçar M, and Avci A
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- 2024
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17. Immunohistochemical examination of immunoreactivity of transient receptor potential melastatin 2, glutathione peroxidase 4 and spexin in lichen planus.
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Celik MS, Cicek D, Demir B, Kuloğlu T, Artaş G, and Hançer S
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- Humans, Female, Male, Adult, Middle Aged, Skin pathology, Skin metabolism, Skin immunology, Case-Control Studies, Young Adult, Aged, Oxidative Stress, Apoptosis, TRPM Cation Channels metabolism, TRPM Cation Channels analysis, Lichen Planus metabolism, Lichen Planus diagnosis, Lichen Planus pathology, Lichen Planus immunology, Phospholipid Hydroperoxide Glutathione Peroxidase metabolism, Immunohistochemistry
- Abstract
Backround: In this study, we aimed to investigate the potential contributions to the disease by examining the immunoreactivities of SPX in LP-affected skin tissue using immunohistochemical methods, in light of its recent prominence as a molecule related to diabetes mellitus, along with apoptosis and ferroptosis mediated by GPX4 and TRPM2 channels facilitating oxidative stress-induced cell death., Objective: This research explored the immunohistochemical expressions of TRPM2, GPX4, and SPX in Lichen Planus (LP) patients compared to healthy individuals., Materials and Methods: Forty skin samples were collected, split equally between LP patients and healthy controls, excluding those with other conditions. Samples underwent immunohistochemical staining for TRPM2, SPX, and GPX4, using secondary antibodies and chromogens AEC or DAB. Histoscores were calculated based on staining diffusiveness and severity. Statistical analyses were performed with SPSS 22.0, using t-tests and ANOVA, with significance set at p < 0.05., Results: There were no demographic differences between groups (p > 0.05). LP patients showed significantly lower TRPM2 and GPX4 histoscores and higher SPX histoscores compared to controls (TRPM2 and GPX4: p < 0.001, SPX: p < 0.001). Gender and age did not affect histoscores significantly., Conclusions: Findings suggest TRPM2, GPX4, and SPX play roles in LP pathogenesis, indicating a need for further molecular studies to clarify their involvement. This contributes to understanding LP beyond the traditional apoptosis perspective., (© 2024. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
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- 2024
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18. The prognostic impact of Her2 status in early triple negative breast cancer: a Turkish Oncology Group (TOG) study.
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Özyurt N, Alkan A, Gülbağcı B, Seyyar M, Aydın E, Şahbazlar M, Türker M, Kınıkoğlu O, Yerlikaya T, Dinç G, Aytaç A, Kalkan Z, Ebinç S, Gültürk İ, Keskinkılıç M, İşleyen ZS, Çağlayan D, Türkel A, Aydın E, Şakalar T, Sekmek S, Yıldırım N, Koçak S, Okutur K, Özveren A, Dursun B, Kitaplı S, Eren OÖ, Beypınar İ, Hacıbekiroğlu İ, Çabuk D, Karaman E, Acar Ö, Paydaş S, Eryılmaz MK, Demir B, Oruç Z, Yılmaz M, Biricik FS, Salim DK, Tanrıverdi Ö, and Doğan M
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- Humans, Female, Middle Aged, Prognosis, Adult, Turkey, Retrospective Studies, Aged, Disease-Free Survival, Biomarkers, Tumor genetics, Biomarkers, Tumor metabolism, Triple Negative Breast Neoplasms genetics, Triple Negative Breast Neoplasms pathology, Triple Negative Breast Neoplasms mortality, Triple Negative Breast Neoplasms drug therapy, Receptor, ErbB-2 metabolism, Receptor, ErbB-2 genetics, Neoadjuvant Therapy
- Abstract
The studies evaluating the impact of Her2 levels in neoadjuvant setting have conflicting data. The aim of the study was to evaluate the prognostic impact of Her2 status in early triple negative breast cancer(TNBC). In the study TNBC patients who were treated with neoadjuvant chemotherapy (NAC) and surgery were analyzed retrospectively. The primary aim of the study was to analyze the impact of Her2 status(Her2-0 and Her2-low) on pathological complete response (pCR). The secondary objectives were disease free survival (DFS) and overall survival (OS). 620 female triple negative breast cancer patients were evaluated. 427 patients (68.9%) had Her2-0 and 193(31.1%) had her2-low pathology. The pCR rates were similar between Her2-0 and Her2-low patients (33.0% vs. 27.5%, p = 0.098). Although Her2-0 group has better DFS (106 vs. 50 months, p = 0.002), in multivariate analysis it had a HR of 0.74 (p = 0.06). In addition, OS was similar (131 vs. 105 months, p = 0.13) with a HR of 0.88 (p = 0.61). In multivariate analysis; presence of LVI (HR:2.2 (95% CI 1.1-3.5) p = 0.001), Clinical stage T1/T2 (HR:0.39 (95% CI 0.2-0.6) p < 0.001) and lymph node negativity (HR:0.35 (95% CI 0.1-0.9) p = 0.03) were independent factors for OS. Although there were pathological and clinical differences, the pCR, DFS and OS were similar between Her2-0 and Her2-low TNBC patients. The importance of Her2 status of TNBC in neoadjuvant setting should be further studied., (© 2024. The Author(s).)
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- 2024
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19. A Case of Diffuse Infiltrative Hepatocellular Carcinoma with Marked Response to Sorafenib Treatment Evidenced by 18 F-FDG PET/MRI.
- Author
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Özkan E, Demir B, Kuru Öz D, Ürün Y, and Küçük NÖ
- Abstract
A 73-year-old woman with known diagnosis of chronic hepatitis B infection referred for
18 F-fluorodeoxyglucose positron emission tomography/computed tomography (18 F-FDG PET/CT) and magnetic resonance imaging (MRI) after detection of a liver mass with 9 cm diameter in contrast enhanced CT. However,18 F-FDG PET/CT and MRI revealed diffuse infiltrating hepatocellular carcinoma lesions other than previously defined mass. After 9 months of Sorafenib treatment serum alpha feto protein levels dropped from 60,500 ng/mL to 801 ng/mL. Later18 F-FDG PET/MRI was performed for evaluation of response to treatment and revealed marked response to treatment., Competing Interests: Conflict of Interest: No conflicts of interest were declared by the authors., (Copyright© 2024 The Author. Published by Galenos Publishing House on behalf of the Turkish Society of Nuclear Medicine.)- Published
- 2024
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20. Prognostic Importance of 18 F-FDG Positron Emission Tomography in Uterine Cervical Cancer.
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Soydal Ç, Baltacıoğlu MH, Araz M, Demir B, Dursun E, Taşkın S, Küçük NÖ, and Ortaç F
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Objectives: The aim of this study was to evaluate the prognostic value of
18 F-fluorodeoxyglucose (18 F-FDG) positron emission tomography/computed tomography (PET/CT) in the uterine cervix cancer patients., Methods: Thirty-two women (mean age: 52.7±12.6) who underwent18 F-FDG PET/CT for staging of uterine cervix cancer were retrospectively recruited for the study. Maximum standardized uptake value (SUVmax ), SUVmean , metabolic tumor volume (MTV), and total lesion glycolysis (TLG) for primary tumors, lymph nodes, and distant metastases were calculated from18 F-FDG PET/CT images using the 40% threshold. Patients were divided into groups according to the presence of pelvic and para-aortic lymph node involvement on18 F-FDG PET/CT images. Life tables and Kaplan-Meier analyses were performed to compare the mean survival times of the different groups., Results: Primary tumor of 27 (84%) patients were18 F-FDG avid. The median SUVmax , SUVmean , MTV, and TLG of the primary tumors were 12.4, 6.1, 13.2 cm3 and 87.8 g/mL x cm3 respectively. Pathological uptake was detected in pelvic 14 (44%) patients and in paraaortic lymph nodes in 3 (10%) para-aortic lymph nodes. The median whole-body MTV and TLG were 21.7 cm3 and 91.1 g/mL x cm3 . Disease progression was detected in 7 (22%) patients within a median follow-up period of 20.9 (minimum-maximum: 3-82) months. The only significant PET parameter to predict progression-free survival was SUVmax in the primary tumor (p=0.038). During follow-up period 8 patients died. SUVmax (p=0.007), MTV (p=0.036), TLG (p=0.001) of primary tumor, presence of pathological uptake on pelvic or paraaortic lymph nodes (p=0.015), whole-body MTV (p=0.047) and whole-body TLG (p=0.001) were found statistically significant PET parameters to predict overall survival., Conclusion: Metabolic parameters of primary tumors derived from18 F-FDG PET/CT images have prognostic importance for patients with uterine cervical carcinoma. In patients with metastatic disease, higher whole-body MTV and TLG are also associated with poor prognosis., Competing Interests: Conflict of Interest: No conflict of interest was declared by the authors., (Copyright© 2024 The Author. Published by Galenos Publishing House on behalf of the Turkish Society of Nuclear Medicine.)- Published
- 2024
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21. Machine learning and radiomics for ventricular tachyarrhythmia prediction in hypertrophic cardiomyopathy: insights from an MRI-based analysis.
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Durmaz ES, Karabacak M, Ozkara BB, Kargın OA, Demir B, Raimoglou D, Aygun AA, Adaletli I, Bas A, and Durmaz E
- Abstract
Background: Myocardial fibrosis is often detected in patients with hypertrophic cardiomyopathy (HCM), which causes left ventricular (LV) dysfunction and tachyarrhythmias., Purpose: To evaluate the potential value of a machine learning (ML) approach that uses radiomic features from late gadolinium enhancement (LGE) and cine images for the prediction of ventricular tachyarrhythmia (VT) in patients with HCM., Material and Methods: Hyperenhancing areas of LV myocardium on LGE images were manually segmented, and the segmentation was propagated to corresponding areas on cine images. Radiomic features were extracted using the PyRadiomics library. The least absolute shrinkage and selection operator (LASSO) method was employed for radiomic feature selection. Our model development employed the TabPFN algorithm, an adapted Prior-Data Fitted Network design. Model performance was evaluated graphically and numerically over five-repeat fivefold cross-validation. SHapley Additive exPlanations (SHAP) were employed to determine the relative importance of selected radiomic features., Results: Our cohort consisted of 60 patients with HCM (73.3% male; median age = 51.5 years), among whom 17 had documented VT during the follow-up. A total of 1612 radiomic features were extracted for each patient. The LASSO algorithm led to a final selection of 18 radiomic features. The model achieved a mean area under the receiver operating characteristic curve of 0.877, demonstrating good discrimination, and a mean Brier score of 0.119, demonstrating good calibration., Conclusion: Radiomics-based ML models are promising for predicting VT in patients with HCM during the follow-up period. Developing predictive models as clinically useful decision-making tools may significantly improve risk assessment and prognosis., Competing Interests: Declaration of conflicting interestsThe authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
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- 2024
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22. A rare disease with many faces: A multicenter registry of IgG4-related disease in children.
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Kaya Akca U, Kose H, Kurt T, Ulu K, Guliyeva V, Kılbas G, Arslanoglu C, Yildirim DG, Demir S, Sahin S, Kısaarslan AP, Kasap Demir B, Sonmez HE, Koker O, Yardimci GK, Ekici M, Kilic SS, Acar BC, Sozeri B, Aktay Ayaz N, Yuksel S, Bakkaloglu SA, Kasapcopur O, Ayhan EA, Karadag O, Ozen S, and Bilginer Y
- Abstract
Objectives: We aimed to report the characteristics of pediatric IgG4-related disease (IgG4-RD) through a multicentre registry, to assess disease clusters, and to evaluate the performances of the 2019 American College of Rheumatology and European League Against Rheumatism (ACR/EULAR) classification criteria and the 2020 revised comprehensive diagnostic (RCD) criteria in this cohort., Methods: Data of IgG4-RD patients in 13 pediatric rheumatology centers were recorded to a web-based registration system. The diagnosis of IgG4-RD was made according to the 2011 comprehensive diagnostic criteria., Results: Thirty-five children (19 females and 16 males) with IgG4-RD were enrolled. The median age at diagnosis was 13.3 (25p-75p; 9.9-15.2) years. The most common organ involvement was the eye (n = 21, 60%), followed by lymph nodes (n = 12, 34.3%), musculoskeletal system (n = 12, 34.3%), and neurological system (n = 9, 25.7%). We identified three clusters in our study cohort: those with eye involvement (n = 11, 31.4%), those with eye involvement and neurological findings (n = 15, 42.9%), and those with pancreato-hepatobiliary disease and lymph node involvement (n = 9, 25.7%). Serum IgG4 levels were high in 19 out of 28 patients (67.8%). All patients except one received corticosteroid treatment, and azathioprine was the most preferred drug as a steroid-sparing agent. The sensitivities of the 2019 ACR/EULAR classification criteria and the 2020 RCD criteria were 5.7% and 88.5%, respectively., Conclusion: IgG4-RD has a wide variety of clinical manifestations, however in children the most common presentation was orbital involvement. The 2020 RCD criteria had a better performance whereas the 2019 ACR/EULAR classification criteria performed poorly in pediatric patients., (© The Author(s) 2024. Published by Oxford University Press on behalf of the British Society for Rheumatology. All rights reserved. For permissions, please email: journals.permissions@oup.com.)
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- 2024
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23. Cognitive activity analysis of Parkinson's patients using artificial intelligence techniques.
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Demir B, Ayna Altuntaş S, Kurt İ, Ulukaya S, Erdem O, Güler S, and Uzun C
- Abstract
Purpose: The development of modern Artificial Intelligence (AI) based models for the early diagnosis of Parkinson's disease (PD) has been gaining deep attention by researchers recently. In particular, the use of different types of datasets (voice, hand movements, gait, etc.) increases the variety of up-to-date models. Movement disorders and tremors are also among the most prominent symptoms of PD. The usage of drawings in the detection of PD can be a crucial decision-support approach that doctors can benefit from., Methods: A dataset was created by asking 40 PD and 40 Healthy Controls (HC) to draw spirals with and without templates using a special tablet. The patient-healthy distinction was achieved by classifying drawings of individuals using Support Vector Machine (SVM), Random Forest (RF), and Naive Bayes (NB) algorithms. Prior to classification, the data were normalized by applying the min-max normalization method. Moreover, Leave-One-Subject-Out (LOSO) Cross-Validation (CV) approach was utilized to eliminate possible overfitting scenarios. To further improve the performances of classifiers, Principal Component Analysis (PCA) dimension reduction technique were also applied to the raw data and the results were compared accordingly., Results: The highest accuracy among machine learning based classifiers was obtained as 90% with SVM classifier using non-template drawings with PCA application., Conclusion: The model can be used as a pre-evaluation system in the clinic as a non-invasive method that also minimizes environmental and educational level differences by using simple hand gestures such as hand drawing, writing numbers, words, and syllables. As a result of our study, preliminary preparation has been made so that hand drawing analysis can be used as an auxiliary system that can save time for health professionals. We plan to work on more comprehensive data in the future., (© 2024. Fondazione Società Italiana di Neurologia.)
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- 2024
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24. High serum progesterone levels on the day of embryo transfer in patients undergoing artificial frozen-thawed blastocyst transfer: Is there a ceiling effect?
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Tohma YA, Demir B, Dundar B, Boynukalin FK, Findikli N, Bahceci M, and Bozdag G
- Abstract
Objective: To evaluate the potential ceiling effect of high serum progesterone levels on the day of embryo transfer for pregnancy outcomes in patients undergoing artificial frozen-thawed blastocyst transfer (FET) cycles., Materials and Methods: This retrospective cohort study included 595 patients who underwent artificial FET cycles. We evaluated progesterone levels and found that 40.6 ng/mL corresponded to the 90th percentile and 23.9 ng/mL corresponded to the 50th percentile. Based on these findings, we categorized progesterone levels as <20 ng/mL (n=220, 37.0%), 20-40 ng/mL (n=312, 52.4%), and ≥40 ng/mL (n=63, 10.6%). The primary outcome measures were the clinical pregnancy rate (CPR) and live birth rate (LBR)., Results: Blastocyst morphology grades, including expansion, trophectoderm, and inner cell mass grades, were significantly associated with clinical pregnancy (p<0.001 for all). Progesterone levels between 20 and 40 ng/mL were associated with higher CPR (p=0.043). In the multivariate analysis, only blastocyst expansion and inner cell mass grades were independently and significantly associated with CPR [p=0.011, odds ratio (OR)=1.6, (confidence interval) CI 95%=1.13-2.39, and p=0.007, OR=1.65, CI 95%=1.14-2.39, respectively]. The progesterone level and trophectoderm grade were not statistically significant. Regarding LBR, only blastocyst expansion grades 4 and trophectoderm grades A or B were significantly associated., Conclusion: Based on these data, we speculate that if serum progesterone levels exceed 40 ng/mL on the day of embryo transfer in patients undergoing artificial FET cycles, there is no need to reduce the progesterone dose., Competing Interests: Conflict of Interest: No conflict of interest was declared by the authors., (Copyright© 2024 The Author. Published by Galenos Publishing House on behalf of Turkish Society of Obstetrics and Gynecology.)
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- 2024
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25. Bidirectionality of LF when the movie makes you sad: Effects of negative emotions on heart rate variability among patients with major depression.
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Ozden HC, Gurel SC, Ozer N, and Demir B
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- Humans, Male, Female, Adult, Emotions physiology, Electrocardiography, Ambulatory, Young Adult, Autonomic Nervous System physiopathology, Anger physiology, Depressive Disorder, Major physiopathology, Depressive Disorder, Major psychology, Heart Rate physiology, Sadness physiology, Motion Pictures
- Abstract
Objectives: Heart rate variability (HRV) reflects the capacity to adapt to internal and environmental changes. Decreased HRV may indicate inadequate adaptive capacity. This study aims to investigate the relationship between the heart and brain's adaptive abilities, both at rest and when negative emotions are stimulated in depression., Subjects and Methods: The study included 30 patients (20 female, 10 male) with major depression (mean age = 29.8 ± 7.8) and 30 healthy controls, all of whom had similar characteristics in terms of age and gender, selected through convenience sampling. The patients were drug-free at the time of the assessment. Holter recordings were obtained while subjects watched videos stimulating anger, fear, sadness, and a neutral video, and at rest, HRV parameters were calculated. To control for interindividual variability and account for paired sampling, linear mixed effects models were employed., Results: Watching the 'sadness video' led to an increase in low frequency band (LF) [LF change (Control vs depression); Difference:-620.80 df:107 t:-2.093 P:0.039] and LF/high frequency band ratio (LF/HF) [LF/HF change (control vs depression group); Difference:-1.718 df:105 t:-2.374 P:0.020] in the depression group. The video led to a decrease in LF and LF/HF in the controls. Although the differences between the conditions and interactions with the group were significant, the effects were independent of depression severity., Conclusion: In depression, brain's regulatory effect on the heart differed from controls in the sadness condition, possibly due to increased arousal levels in subjects with depression and their inability to suppress sympathetic activity when a state of sadness is stimulated., Competing Interests: Declaration of competing interest The authors declare any financial support or relationship that may pose a conflict of interest., (Copyright © 2024 Elsevier Inc. All rights reserved.)
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- 2024
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26. Macrophage activation syndrome in patients with systemic juvenile idiopathic arthritis on anti-interleukin-1 or -6 therapy.
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Ulu K, Aliyev E, Kılıç Könte E, Tanatar A, Türkmen Ş, Doğantan Ş, Kızıldağ Z, Kasap Demir B, Gezgin Yıldırım D, Otar Yener G, Öztürk K, Baba Ö, Açarı C, Kılbaş G, Taşkın SN, Haşlak F, Çağlayan Ş, Bağlan E, Dundar HA, Başaran Ö, Barut K, Karadağ ŞG, Coşkuner T, Sönmez HE, Yüksel S, Kalyoncu M, Bakkaloğlu SA, Ünsal E, Paç Kısaarslan A, Bilginer Y, Aktay Ayaz N, Kasapçopur Ö, Özen S, and Sözeri B
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- Humans, Male, Female, Child, Child, Preschool, Adolescent, Antirheumatic Agents therapeutic use, Interleukin-6 antagonists & inhibitors, Interleukin-6 blood, Interleukin-1 antagonists & inhibitors, C-Reactive Protein metabolism, C-Reactive Protein analysis, Blood Sedimentation, Biological Products therapeutic use, Platelet Count, Ferritins blood, Macrophage Activation Syndrome etiology, Macrophage Activation Syndrome drug therapy, Arthritis, Juvenile drug therapy, Arthritis, Juvenile complications, Antibodies, Monoclonal, Humanized therapeutic use
- Abstract
Objectives: The aim of this study is to investigate the effect of anti-interleukin (IL)-1/-6 biologics on systemic juvenile idiopathic arthritis (sJIA)-associated macrophage activation syndrome (MAS)., Methods: Demographic, clinical and laboratory data of patients followed up with a diagnosis of sJIA-associated MAS assessed from sixteen paediatric rheumatology centres across the country. The clinical and laboratory features of MAS developing while on biological drugs were compared with those without this treatment., Results: One hundred and sixty-two patients were included in the study. Forty-five of the MAS events were detected under the effect of anti-IL-1/-6 biologics, while the patients experiencing the remaining 155 events have not received biological treatment in the last three months. Platelet count [128 (72-232) vs 199 (130-371) 109/l], ferritin level on admission [1107 (676-2050) vs 2863 (1193-9562) ng/ml], C-reactive protein level [15.4 (2.9-56) vs 90 (32-160) mg/l], erythrocyte sedimentation rate [13 (3-36) vs 43.5 (13-77) mm/h] and fever duration [5 (4-7.5) vs 10 (7-14.3) days] were found lower in the group under the impact of anti-IL-1/-6 biologics. Among patients treated with biologics, 26.6% did not meet the published 2016 MAS classification criteria at presentation. The rates of hepatomegaly and splenomegaly were relatively lower in the canakinumab-treated group when compared with those receiving other biologicals or to patients, not on biologicals., Conclusion: Anti-IL-1/-6 therapies can mask the clinical and laboratory features of MAS, and proposed guidelines for MAS classification criteria may not be met., (© The Author(s) 2024. Published by Oxford University Press on behalf of the British Society for Rheumatology. All rights reserved. For permissions, please email: journals.permissions@oup.com.)
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- 2024
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27. Voxel-based dosimetry with integrated Y-90 PET/MRI and prediction of response of primary and metastatic liver tumors to radioembolization with Y-90 glass microspheres.
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Demir B, Soydal C, Kucuk NO, Celebioglu EC, Bilgic MS, Kuru Oz D, Elhan AH, and Kir KM
- Abstract
Purpose: In this study, we aimed to evaluate the response of the primary and metastatic liver tumors to radioembolization with
90 Y glass microspheres and investigate its correlations with dosimetric variables calculated with90 Y PET/MRI., Methods: In this ambispective study, 44 patients treated with90 Y glass microspheres and imaged with90 Y PET/MRI were included for analysis. Dosimetric analysis was performed for every perfused lesion using dose-volume histograms. Response was assessed by comparing pre-treatment and follow-up total lesion glycolysis (TLG) values derived from18 F-FDG PET imaging. The relationship between ΔTLG and log-transformed dosimetric variables was analyzed with linear mixed effects regression models. ROC analyses were performed to compare discriminatory power of the variables in predicting response and complete response., Results: Regression and ROC analyses demonstrated that mean tumor dose and almost all D values were statistically significant predictors of treatment response and complete treatment response. Specifically, D60, D70 and D80 values exhibited significantly higher discriminatory power for predicting treatment response compared to the mean dose (Dmean ) delivered to tumor. High specificity cut-off values to predict response were determined as 160.75 Gy for Dmean , 95.50 Gy for D60, 89 Gy for D70, and 59.50 Gy for D80. Similarly, high-specificity cut-off values to predict complete response were 262.75 Gy for Dmean , 173 Gy for D70, 140.5 Gy for D80, and 100 Gy for D90., Conclusion: In this study, we demonstrated that voxel-based dosimetry with post-treatment90 Y PET/MRI can predict response to treatment. D60, D70 and D80 variables also did have greater discriminatory power compared to Dmean in prediction of response. In addition, we present high-specificity cut-offs to predict response (CR + PR) and complete response (CR) for both Dmean and several D variables derived from dose-volume histograms., (© 2024. The Author(s) under exclusive licence to The Japanese Society of Nuclear Medicine.)- Published
- 2024
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28. Are the Symptom Dimensions in Obsessive Compulsive Disorder Related to Thought-Action Fusion, Magical Thinking, and Schizotypal Personality Traits?
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Çetin Ç, Eroğlu EÖ, Özdemir P, and Demir B
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Introduction: This study aimed to investigate the relationship between symptom dimensions within obsessive-compulsive disorder and thought-action fusion, magical thinking, and schizotypal personality traits., Methods: This research was designed as a cross-sectional case-control study. The study population involved patients with obsessive-compulsive disorder, and healthy controls who did not exhibit any psychiatric disorders following the Structured Clinical Interview for DSM-IV (SCID-I). Thought-Action Fusion Scale (TAFS), Magical Ideation Scale (MIS), Vancouver Obsessional-Compulsive Inventory (VOCI), Schizotypal Personality Questionnaire (SPQ), Beck Anxiety Inventory (BAI), Beck Depression Inventory (BDI) were administered to all participants. The two groups were compared in terms of sociodemographic variables and scale scores, Spearman's correlation analysis was performed to examine the relationship between TAFS total and all subscale scores, magical thinking, schizotypal personality traits and OCD symptom dimensions scores., Results: The study comprised 37 patients with OCD and 36 healthy controls. The patient group exhibited significantly higher scores in TAF total and all subscales, MIS, SCQ, BDI, and BAI, compared to the healthy control group. Positive correlations between magical ideation scores and VOCI-obsessions and VOCI-hoarding subscale scores and between schizotypal personality scores and VOCI-obsessions, VOCI-hoarding, VOCI-just right, VOCI indecisiveness scores was found., Conclusions: The relationship between symptom dimensions in obsessive-compulsive disorder such as sexual, religious, aggression, hoarding, symmetry/ordering and magical thinking and schizotypal personality traits shows that these variables are among the determining factors for OCD symptoms. ., Competing Interests: Conflict of Interest: The authors declared that there is no conflict of interest., (Copyright: © 2024 Turkish Neuropsychiatric Society.)
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- 2024
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29. Stigmatization of patients with mental disorders: a comparative study of nurses in forensic psychiatry and inpatient settings.
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Kılıç-Demir B and Kızılpınar SÇ
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Background: Forensic psychiatric patients require specialized care due to the unique challenges in forensic settings. Negative attitudes and beliefs towards mentally disordered offenders can lead to discrimination against patients and are related to worse outcomes. Forensic psychiatric nurses play a crucial role in the treatment of these patients., Aim: This study aimed to investigate the perceptions, attitudes, and beliefs of forensic psychiatric nurses and general medicine nurses towards psychiatric patients and to compare them between nurse groups., Method: The study was conducted with 46 nurses working in the High-Security Forensic Psychiatry Clinic (Mean age: 35.46, SD= 7.16) and 58 nurses working in other inpatient settings (Mean age:36.28, SD=8.78) aged between 18-65 between December 2020 and April 2021 in Turkey. Nurses in the forensic psychiatry clinic were required to have at least 6 months of experience in the clinic., Results: Forensic psychiatric nurses exhibited more positive attitudes towards patients (p<.0001), showing lower tendency to be socially distant (p=.009), higher trust (p<.0001), higher willingness to treat (p<.0001), lower tendency to perceive patients as threatening (p=.004), and more general positive attitudes. Significant relationships were found between some of the stigma-related scales we used and certain factors. For forensic nurses, being male (p=0.043) and single (p=,025), working long hours (p=.047), and having fewer children (p=.005) were related to more negative perceptions about delinquents. Insufficient knowledge about forensic psychiatry was linked to negative beliefs about mental disorders (p=0.017) and specifically the curability of mental disorders (p=0.008). Having more siblings was related to higher embarrassment about mental disorders (p=.043). For general nurses, having first-degree relatives who receive psychiatric treatment was related to perceiving patients as threatening (p=.021)) and negative perceptions about delinquents (p=.007). Being older was related to more positive beliefs about mental patients' dangerousness (p=.026). Having more siblings was associated with higher trust toward patients (p=0.002)., Conclusions: These findings emphasize the importance of addressing stigmatization among healthcare professionals, particularly forensic psychiatry nurses and general nurses. Providing comprehensive training about mental disorders and forensic psychiatry and promoting empathy and understanding can enhance the quality of care for patients with mental illnesses and contribute to better mental health outcomes for society., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2024 Kılıç-Demir and Kızılpınar.)
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- 2024
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30. Complications of Laparoscopic and Open Donor Hepatectomy for Living Donor Liver Transplantation: Single Center Experience.
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Tırnova İ, Alim A, Karataş C, Akbulut A, Demir B, Alper A, and Kanmaz T
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- Humans, Female, Male, Retrospective Studies, Adult, Treatment Outcome, Risk Factors, Time Factors, Young Adult, Middle Aged, Living Donors, Liver Transplantation adverse effects, Hepatectomy adverse effects, Laparoscopy adverse effects, Postoperative Complications etiology
- Abstract
Objectives: Donor hepatectomy is a major surgery with a relatively safeprofile anda reportedcomplication rate of ~20%. Most complications are non-life threatening and are resolved with conservative measures. However, rare complications may need invasive precautions, ranging from percutaneous interventions to surgeries., Materials and Methods: We retrospectively analyzed all living donor hepatectomies at our center. Donors were divided into 2 groups: laparoscopic and open procedures. We collected preoperative, intraoperative and postoperative data of donors.Donor complications were recorded separately intraoperatively and postoperatively according to the Clavien-Dindo postoperative complication classification system., Results: Between July 2018 and April 2023, 215 living donors had hepatectomies, including 48 laparoscopic and 167 open donor hepatectomies. Among donors, 91 were female donors (42.3%) and 124 were male donors (57.7%).The meanage of alldonorswas 33.5±8.1 years, and the mean body mass index (in kilogram divided by meters squared) was 24.6 ± 3.8. Among donors, 124 underwent right and 91 underwent left or left lateral hepatectomies. The mean operative time for all donors was 301 ± 83 minutes, the mean hospital stay was 5.8 ± 1.4 days, and the mean follow-up was 31.9 ± 15.8 months. Four patients (1.8%) had intraoperative complications, including 2 cases of bleeding, 1 diaphragm perforation, and 1 portal vein stenosis. Fourteen patients (7.4%) had major postoperative complications, with 5 patients requiring surgical intervention., Conclusions: Donor hepatectomy is a complicated surgery that requires extensive preoperative preparation and appropriate donor selection. Postoperative donor complications can be diagnosed early with close follow-up, and a multidisciplinary approach is essential for complication management.
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- 2024
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31. Outcomes of anti-VEGF treatment for macular edema secondary to central retinal vein occlusion in patients with poor baseline visual acuity.
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Demir B, Mishra A, Gutierrez MPM, Rasheed R, Charitaki M, Preston E, Sivaprasad S, Hykin P, and Nicholson L
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- Humans, Retrospective Studies, Male, Female, Aged, Treatment Outcome, Middle Aged, Follow-Up Studies, Fluorescein Angiography methods, Aged, 80 and over, Retinal Vein Occlusion drug therapy, Retinal Vein Occlusion complications, Retinal Vein Occlusion physiopathology, Retinal Vein Occlusion diagnosis, Macular Edema drug therapy, Macular Edema etiology, Macular Edema physiopathology, Macular Edema diagnosis, Visual Acuity physiology, Angiogenesis Inhibitors administration & dosage, Intravitreal Injections, Vascular Endothelial Growth Factor A antagonists & inhibitors, Ranibizumab administration & dosage, Tomography, Optical Coherence, Bevacizumab administration & dosage
- Abstract
Objective: To report the visual outcomes of intravitreal anti-vascular endothelial growth factor (anti-VEGF) treatment for macular edema secondary to central retinal vein occlusion (CRVO) in patients with baseline visual acuity of ≤23 ETDRS letters vision., Design: Retrospective observational cohort study., Methods: This is a single-institution study. A total of 173 eyes from 173 patients who had completed 3 consecutive monthly anti-VEGF injections for macular edema secondary CRVO and best-corrected visual acuity (BCVA) ≤23 ETDRS letters were included. The main outcome measures were visual acuity at month 3 and month 12., Results: At month 3, BCVA increased to 34.1 ETDRS letters (95% CI, 30.7-37.5), with a gain of 25.0 letters (95% CI, 22.0-28.5; p < 0.001). The mean central subfield thickness decreased by 519 μm (95% CI, 475.5-567.0; p < 0.001). Most patients (67.6%) gained >15 ETDRS letters. A total of 160 patients were followed up for 12 months, and the mean BCVA was 31.2 ETDRS letters (95% CI, 27.5-34.9) at the end of this period. A third of eyes that did not respond (<5-letter gain) after a single injection experienced a 15-letter or more improvement after 3 consecutive injections., Conclusions: Anti-VEGF treatment in eyes with CRVO and poor baseline visual acuity results in significant visual improvement, and moderate improvement is still noted despite a poor response after a single injection., (Copyright © 2023 Canadian Ophthalmological Society. Published by Elsevier Inc. All rights reserved.)
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- 2024
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32. Efficacy and safety of G-CSF prophylaxis in patients with extensive-stage small cell lung cancer receiving chemoimmunotherapy.
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Ilhan Y, Ucar G, Baser MN, Guzel HG, Efil SC, Demir B, Ercan Uzundal D, Karacelik T, Sever N, Balcik OY, Arvas H, Karadag I, Kadioglu A, Ekinci ÖB, Karacin C, Urakci Z, Kostek O, Karakurt Eryilmaz M, Yazici O, Sendur MAN, Ozturk B, Uncu D, and Ergun Y
- Subjects
- Humans, Male, Middle Aged, Female, Retrospective Studies, Aged, Adult, Immunotherapy methods, Progression-Free Survival, Aged, 80 and over, Survival Rate, Neoplasm Staging, Treatment Outcome, Carboplatin administration & dosage, Carboplatin adverse effects, Carboplatin therapeutic use, Small Cell Lung Carcinoma drug therapy, Small Cell Lung Carcinoma pathology, Small Cell Lung Carcinoma mortality, Lung Neoplasms drug therapy, Lung Neoplasms pathology, Lung Neoplasms mortality, Etoposide administration & dosage, Etoposide adverse effects, Etoposide therapeutic use, Antineoplastic Combined Chemotherapy Protocols adverse effects, Antineoplastic Combined Chemotherapy Protocols therapeutic use, Antineoplastic Combined Chemotherapy Protocols administration & dosage, Antibodies, Monoclonal, Humanized administration & dosage, Antibodies, Monoclonal, Humanized adverse effects, Antibodies, Monoclonal, Humanized therapeutic use, Granulocyte Colony-Stimulating Factor administration & dosage, Granulocyte Colony-Stimulating Factor therapeutic use
- Abstract
Objectives: We aimed to evaluate the efficacy and safety of granulocyte-colony stimulating factor (G-CSF) prophylaxis during chemoimmunotherapy with carboplatin plus etoposide and atezolizumab in extensive-stage small cell lung cancer (ES-SCLC)., Methods: This retrospective, multicenter study enrolled ES-SCLC patients receiving carboplatin plus etoposide and atezolizumab, categorized into G-CSF and non-G-CSF groups. Demographic and disease-related data were collected. Response rates, progression-free survival (PFS), overall survival (OS), and toxicity were analyzed., Results: Of 119 patients (median age: 63 years), the overall response rate (ORR) and disease control rate (DCR) were 72.3% and 81.5%, respectively. In the G-CSF group, the ORR was 76.4% compared to 60.0% in the non-G-CSF group ( p = 0.33), and the DCR was 85.4% versus 70.0%, respectively ( p = 0.46). Median PFS was 8.3 months (95% CI, 6.8-9.8) in the G-CSF group and 6.8 months (95% CI, 6.2-7.5) in the non-G-CSF group ( p = 0.24). Median OS was 13.8 months (95% CI, 9.6-18.1) for the G-CSF group and 10.6 months (95% CI, 7.9-13.3) for the non-G-CSF group ( p = 0.47). Grade 3 ≥ adverse events were similar between groups (49.4% vs. 33.3%, respectively, p = 0.12)., Conclusion: G-CSF prophylaxis can be safely used in ES-SCLC patients undergoing carboplatin plus etoposide and atezolizumab regimen without significantly altering efficacy or increasing toxicity.
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- 2024
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33. Outcome of immunosuppression in children with IgA vasculitis-related nephritis.
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Rohner K, Marlais M, Ahn YH, Ali A, Alsharief A, Novak AB, Brambilla M, Cakici EK, Candan C, Canpolat N, Chan EY, Decramer S, Didsbury M, Durao F, Durkan AM, Düzova A, Forbes T, Gracchi V, Güngör T, Horinouchi T, Kasap Demir B, Kobayashi Y, Koskela M, Kurt-Sukur ED, La Scola C, Langan D, Li X, Malgieri G, Mastrangelo A, Min J, Mizerska-Wasiak M, Moussaoui N, Noyan A, Nuutinen M, O'Gormon J, Okamoto T, Oni L, Oosterveld M, Pańczyk-Tomaszewska M, Parmaksiz G, Pasini A, Rianthavorn P, Roelofs J, Shen Y, Sinha R, Topaloglu R, Torres DD, Udagawa T, Wennerström M, Yap YC, and Tullus K
- Subjects
- Humans, Male, Child, Female, Retrospective Studies, Adolescent, Child, Preschool, Prognosis, Glomerulonephritis, IGA drug therapy, Glomerulonephritis, IGA pathology, Follow-Up Studies, Immunosuppression Therapy methods, IgA Vasculitis drug therapy, IgA Vasculitis complications, IgA Vasculitis diagnosis, Treatment Outcome, Vasculitis drug therapy, Glomerular Filtration Rate, Immunosuppressive Agents therapeutic use
- Abstract
Background: Immunoglobulin A vasculitis with nephritis (IgAVN) is the most common vasculitis in children. Due to a lack of evidence, treatment recommendations are based on expert opinion, resulting in variation. The aim of this study was to describe the clinical presentation, treatment and outcome of an extremely large cohort of children with biopsy-proven IgAVN in order to identify prognostic risk factors and signals of treatment efficacy., Methods: Retrospective data were collected on 1148 children with biopsy-proven IgAVN between 2005 and 2019 from 41 international paediatric nephrology centres across 25 countries and analysed using multivariate analysis. The primary outcome was estimated glomerular filtration rate (eGFR) and persistent proteinuria at last follow-up., Results: The median follow-up was 3.7 years (interquartile range 2-6.2). At last follow-up, 29% of patients had an eGFR <90 mL/min/1.73 m2, 36% had proteinuria and 3% had chronic kidney disease stage 4-5. Older age, lower eGFR at onset, hypertension and histological features of tubular atrophy and segmental sclerosis were predictors of poor outcome. There was no evidence to support any specific second-line immunosuppressive regimen being superior to others, even when further analysing subgroups of children with reduced kidney function, nephrotic syndrome or hypoalbuminemia at onset. Delayed start of immunosuppressive treatment was associated with a lower eGFR at last follow-up., Conclusion: In this large retrospective cohort, key features associated with disease outcome are highlighted. Importantly, there was no evidence to support that any specific immunosuppressive treatments were superior to others. Further discovery science and well-conducted clinical trials are needed to define accurate treatment and improve outcomes of IgAVN., (© The Author(s) 2024. Published by Oxford University Press on behalf of the ERA.)
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- 2024
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34. The effect of P2X7 antagonism on subcortical spread of optogenetically-triggered cortical spreading depression and neuroinflammation.
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Uzay B, Donmez-Demir B, Ozcan SY, Kocak EE, Yemisci M, Ozdemir YG, Dalkara T, and Karatas H
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- Animals, Male, Optogenetics, Mice, Migraine Disorders physiopathology, Migraine Disorders metabolism, Migraine Disorders drug therapy, Neurons drug effects, Mice, Inbred C57BL, Niacinamide analogs & derivatives, Piperazines, Cortical Spreading Depression drug effects, Cortical Spreading Depression physiology, Purinergic P2X Receptor Antagonists pharmacology, Neuroinflammatory Diseases, Receptors, Purinergic P2X7 metabolism, Receptors, Purinergic P2X7 drug effects
- Abstract
Migraine is a neurological disorder characterized by episodes of severe headache. Cortical spreading depression (CSD), the electrophysiological equivalent of migraine aura, results in opening of pannexin 1 megachannels that release ATP and triggers parenchymal neuroinflammatory signaling cascade in the cortex. Migraine symptoms suggesting subcortical dysfunction bring subcortical spread of CSD under the light. Here, we investigated the role of purinergic P2X7 receptors on the subcortical spread of CSD and its consequent neuroinflammation using a potent and selective P2X7R antagonist, JNJ-47965567. P2X7R antagonism had no effect on the CSD threshold and characteristics but increased the latency to hypothalamic voltage deflection following CSD suggesting that ATP acts as a mediator in the subcortical spread. P2X7R antagonism also prevented cortical and subcortical neuronal activation following CSD, revealed by bilateral decrease in c-fos positive neuron count, and halted CSD-induced neuroinflammation revealed by decreased neuronal HMGB1 release and decreased nuclear translocation of NF-kappa B-p65 in astrocytes. In conclusion, our data suggest that P2X7R plays a role in CSD-induced neuroinflammation, subcortical spread of CSD and CSD-induced neuronal activation hence can be a potential target., (© 2024. The Author(s).)
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- 2024
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35. Real-World Experience of Fluocinolone Acetonide 0.19 mg in the Management of Non-Infectious Uveitis.
- Author
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Logeswaran A, Azzopardi M, Demir B, D'Alonzo G, Chong YJ, Addison P, and Pavesio C
- Abstract
Purpose: This study aims to evaluate the real-world efficacy and safety profile of fluocinolone acetonide (FAc) implants for the treatment of non-infectious uveitis (NIU)., Methods: A retrospective, observational study was conducted at Moorfields Eye Hospital, London, involving patients who received FAc 0.19 mg implants (Iluvien®) for NIU. 2-year follow-up data on baseline characteristics, indications, and outcomes was collected. The primary indicator for treatment failure was defined as the need for rescue treatment with dexamethasone (DEX) implants, while secondary indicators included changes in steroid and systemic immunosuppression requirements, or the need for a second FAc implant before 3 years. The occurrence of complications was collected., Results: Of the 146 eyes treated with FAc implants, 24.0% experienced treatment failure requiring DEX implant within 2 years. About 42.9% required this within the first 6 months. There was an increase in the number of patients requiring steroids and/or systemic immunosuppression. Within the first 2 years post-FAc implant, only 13.7% experienced an IOP rise, with 4.1% requiring IOP-lowering surgery. About 57.9% of the phakic eyes developed cataracts., Conclusion: This study provides valuable real-world evidence supporting the efficacy of FAc implant in NIU. It demonstrates a good safety profile at 2 years, with a significant reduction in uveitis recurrence rate and treatment burden. Our results are especially pertinent to the treatment of uveitic cystoid macular oedema (CMO), which was the primary indication in over 75% of our patients. Furthermore, it suggests that while FAc implant controls retinal inflammation effectively, choroidal inflammation would require alternative treatment.
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- 2024
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36. Identifying SARS-CoV-2 Variants Using Single-Molecule Conductance Measurements.
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Aminiranjbar Z, Gultakti CA, Alangari MN, Wang Y, Demir B, Koker Z, Das AK, Anantram MP, Oren EE, and Hihath J
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- Humans, RNA, Viral genetics, Machine Learning, Single Molecule Imaging methods, Mutation, SARS-CoV-2 genetics, COVID-19 diagnosis, COVID-19 virology
- Abstract
The global COVID-19 pandemic has highlighted the need for rapid, reliable, and efficient detection of biological agents and the necessity of tracking changes in genetic material as new SARS-CoV-2 variants emerge. Here, we demonstrate that RNA-based, single-molecule conductance experiments can be used to identify specific variants of SARS-CoV-2. To this end, we (i) select target sequences of interest for specific variants, (ii) utilize single-molecule break junction measurements to obtain conductance histograms for each sequence and its potential mutations, and (iii) employ the XGBoost machine learning classifier to rapidly identify the presence of target molecules in solution with a limited number of conductance traces. This approach allows high-specificity and high-sensitivity detection of RNA target sequences less than 20 base pairs in length by utilizing a complementary DNA probe capable of binding to the specific target. We use this approach to directly detect SARS-CoV-2 variants of concerns B.1.1.7 (Alpha), B.1.351 (Beta), B.1.617.2 (Delta), and B.1.1.529 (Omicron) and further demonstrate that the specific sequence conductance is sensitive to nucleotide mismatches, thus broadening the identification capabilities of the system. Thus, our experimental methodology detects specific SARS-CoV-2 variants, as well as recognizes the emergence of new variants as they arise.
- Published
- 2024
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37. Individualized luteal phase support in frozen-thawed embryo transfer after intramuscular progesterone administration might rectify live birth rate.
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Boynukalin FK, Tohma YA, Yarkıner Z, Gultomruk M, Bozdag G, Ozkavukcu S, Bahçeci M, and Demir B
- Subjects
- Humans, Female, Retrospective Studies, Pregnancy, Adult, Injections, Intramuscular, Pregnancy Rate, Fertilization in Vitro methods, Administration, Intravaginal, Pregnancy Outcome, Embryo Transfer methods, Progesterone administration & dosage, Progesterone blood, Luteal Phase drug effects, Live Birth epidemiology, Birth Rate, Cryopreservation methods
- Abstract
Background: The serum P concentrations are suggested to have an impact on pregnancy outcome. However there is no consensus about the optimal progesterone cut-off during the luteal phase. Few studies evaluated the effectiveness of a "rescue protocol" for low serum P concentrations and most of these studies used vaginal progesterone administration. There is paucity of data on the effectiveness of rescue protocol using intramuscular progesterone (IM-P) in frozen-thawed embryo transfer (FET)., Methods: This study is a retrospective cohort study included 637 single or double blastocyst FETs with artificially prepared endometrium receiving 100 mg IM progesterone (P) after incremental estrogen treatment. Serum P concentrations were evaluated using blood samples obtained 117-119 hours after the first IM-P administration and 21 ± 2 hours after the last IM-P administration. Patients with serum P concentrations <20.6 ng/ml on the ET day were administrated 400 mg vaginal progesterone for rescue., Results: Demographic and cycle characteristics were similar between patients receiving rescue vaginal P (embryo transfer (ET)-day P concentration < 20.6 ng/ml) and patients who did not need rescue vaginal P (ET-day P concentration ≥ 20.6 ng/ml). Clinical pregnancy, miscarriage, and live birth rates were similar between two groups: 52.9%(45/85) vs 59.6%(326/552), p=0.287; 11.1%(5/45) vs 14.1%(46/326), p=0.583; and 47.1%(40/85) vs 50.7%(280/552), p=0.526, respectively. Logistic regression analysis revealed that the female age (p = 0.008, OR=0.942, 95% CI = 0.902-0.984) and embryo quality (ref: good quality for moderate: p=0.02, OR=0.469, 95% CI =0.269-0.760; for poor: p=0.013, OR= 0.269, 95% CI = 0.092-0.757) were independent variables for live birth. Following rescue protocol implementation, ET-day P concentration was not a significant predictor of live birth., Conclusions: Rescue vaginal P administration for low ET day serum P concentrations following IM-P yields comparable live birth rates., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2024 Boynukalin, Tohma, Yarkıner, Gultomruk, Bozdag, Ozkavukcu, Bahçeci and Demir.)
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- 2024
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38. Survival outcomes according to the tumor location and prognostic factor in metastatic rectal cancer: a multicenter retrospective cohort study.
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Unal OU, Akay S, Semiz HS, Keser M, Demir G, Capar ZG, Demirciler E, Yavuzsen T, Degirmencioglu S, Demir B, Oktay E, Gulmez MD, and Arayici ME
- Abstract
Background & Aims: Prognostic factors of metastatic rectal cancer are not well known. We aim to determine prognostic factors affecting survival for metastatic rectal cancer patients and also to investigate the effect of tumor localization on overall survival., Methods: Metastatic rectal cancer patients who received treatment in 5 different centers between 2012 and 2022 were included. Prognostic factors for survival were evaluated using univariate and multivariate analysis. The statistical methods included Pearson's chi-square test, Fisher exact test, Log-rank test, and Cox regression model., Results: A total of 283 patients with metastatic rectal cancer were included in the study. The median OS was not significantly different among the three groups (upper rectum 30.1 months, middle rectum 28.3 months, and low rectum cancer 24.8 months; log-rank p = 0.25). In univariate analysis, Grade 3, ECOG performance status 2, the presence of multiple metastatic sites, the presence of KRAS mutation, the presence of liver metastases, the presence of nonregional lymph node metastases, and the presence of bone metastases were significant predictors of poor survival. In multivariate analysis, Grade 3, ECOG performance status 2, and the presence of multiple metastatic sites were determined as indicators of worse prognosis., Conclusion: Our findings, primary tumor location did not affect survival in metastatic rectal cancer. The most important factors affecting survival were multiple metastatic sites, tumor grade, and ECOG performance status., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2024 Unal, Akay, Semiz, Keser, Demir, Capar, Demirciler, Yavuzsen, Degirmencioglu, Demir, Oktay, Gulmez and Arayici.)
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- 2024
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39. The Role of Serum Lipids in Predicting Suicidal Ideation in Isotretinoin Therapy for Acne.
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Göçer Gürok N, Demir B, and Atmaca M
- Abstract
Background: Previous studies have demonstrated that lipids could play a role in suicidal ideation and the pathogenesis of psychiatric diseases. The present study aims to investigate the correlation between variations in serum lipid concentration, a side effect of isotretinoin (ITT), psychiatric symptoms, and suicidal ideation in acne vulgaris patients under ITT treatment., Methods: Thestudy was completed with 41 acne patients. Patients were analyzed with the sociodemographic and clinical data form, Beck depression inventory (BDI), Beck anxiety inventory (BAI), Beck Suicidal Ideation Scale (BSS), and Brief Psychiatric Rating Scale (BPRS) at the beginning and on the third month of treatment. Lipid levels [serum total cholesterol (TC), triglyceride (TG) and high-density lipoprotein cholesterol (HDL)] were measured using the automatic chemistry analyzer (Beckman AU-5800). Serum low-density lipoprotein cholesterol (LDL) values were estimated with the Friedewald formula., Results: A statistically significant correlation was determined between the BSS scores and TC, TG, and LDL parameters at the beginning of treatment and the control date. Thus, it was determined that there was a negative weak correlation between BSS and TC parameters ( r = -0.403; P = .009), a moderate negative correlation between BSS and TG ( r = -0.526; P < .001), and a weak negative correlation between BSS and LDL ( r = -0.421; P = .006). Furthermore, there were statistically significant changes between the BDI and BAI scores at the beginning of treatment and the third month ( P = 0.016 and P = .001, respectively). Although an increase was observed in BSS and BPRS after the treatment compared to pretreatment, the increase was not statistically significant., Conclusion: The present study findings revealed that serum lipid levels could be associated with psychiatric side effects in patients under ITT treatment. But, this must not be the only way to detect the risk when we consider that serum lipid levels that have been associated with suicidal ideation, depression, and several psychiatric diseases have the potential to be an important indicator. In this context, our preliminary results open the doors to a new perspective in this regard, using the concept of blood lipid optimization. These findings need to be considered preliminary and supported by large samples., Competing Interests: Declaration of Interests: The authors declare no conflicts of interest., (2024 authors.)
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- 2024
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40. Case report: Sickle cell anemia avascular necrosis mimicking chronic sacroiliitis in a patient with a pre-diagnosis of axial spondyloarthropathy.
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Demir B, Bickici O, and Kaya O
- Subjects
- Humans, Diagnosis, Differential, Treatment Outcome, Magnetic Resonance Imaging, Chronic Disease, Adult, Male, Female, Anemia, Sickle Cell complications, Anemia, Sickle Cell diagnosis, Sacroiliitis diagnosis, Sacroiliitis drug therapy, Sacroiliitis diagnostic imaging, Spondylarthropathies diagnosis, Spondylarthropathies complications, Predictive Value of Tests, Osteonecrosis diagnosis, Osteonecrosis diagnostic imaging
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- 2024
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41. The efficacy of HDDPiW-jSB solution on docetaxel-induced alopecia of rats.
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Demir B, Demirci B, Tataroglu C, Barutca S, and Barutca D
- Subjects
- Animals, Male, Rats, Proto-Oncogene Proteins c-bcl-2 metabolism, Caspase 3 metabolism, Rats, Sprague-Dawley, Alopecia chemically induced, Alopecia drug therapy, Alopecia prevention & control, Docetaxel, Hair Follicle drug effects, Antineoplastic Agents toxicity, Antineoplastic Agents adverse effects
- Abstract
Objective: Chemotherapy induced alopecia (CIA) is one of the most common side effects in cancer patients, however; it doesn't have an effective pharmacological treatment yet. In this study we aimed to research the protective effect of newly developed HDDPiW-jSB solution on docetaxel (DTX) -induced rat alopecia model., Material and Methods: Docetaxel (10 mg/kg/week) was administered to the 6-8 months old rats for three weeks. HDDPiW-jSB solution was applied once or twice a week for 4 weeks beginning prior to one week before DTX. Rat hair follicles were evaluated with hematoxylin-eosin and immune-histochemical staining., Results: In the first stage of this study, alopecia was successfully developed by DTX (10 mg/kg/three times) application. In the second stage of the study, application of HDDPiW-jSB solution, did not change the study parameters significantly on control group. The solution improved the anagen hair follicle count and Bcl-2 levels in the skin samples of DTX-induced alopecic rat groups, especially when applied twice weekly. Additionally, level of Caspase 3 was decreased. HDDPiW-jSB solution was safe when applied on the skin., Conclusion: Topical HDDPiW-jSB solution could be effective and safe for the protection of DTX-induced alopecia in rat models.
- Published
- 2024
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42. Influence of Early Versus Delayed Hepatic Artery Perfusion Scan on 90 Y Selective Internal Radiation Therapy Planning.
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Kovan B, Denizmen D, Civan C, Kuyumcu S, Isik EG, Has Simsek D, Ozkan ZG, Poyanli A, Demir B, and Sanli Y
- Subjects
- Humans, Male, Female, Middle Aged, Aged, Technetium Tc 99m Aggregated Albumin, Radiotherapy Planning, Computer-Assisted methods, Adult, Tomography, Emission-Computed, Single-Photon methods, Aged, 80 and over, Radiopharmaceuticals administration & dosage, Hepatic Artery diagnostic imaging, Liver Neoplasms radiotherapy, Liver Neoplasms diagnostic imaging, Liver Neoplasms blood supply, Liver Neoplasms secondary, Yttrium Radioisotopes therapeutic use, Perfusion Imaging methods
- Abstract
Purpose: This study evaluated the effect of an increase in the time interval between hepatic intra-arterial injection of
99m Tc-macroaggregated albumin (MAA) and hepatic artery perfusion scintigraphy (HAPS) on the lung shunt fraction (LSF) and perfused volume (PV) calculations in the treatment planning of selective internal radiation therapy (SIRT). Methods: The authors enrolled 51 HAPS sessions from 40 patients diagnosed with primary or metastatic liver malignancy. All patients underwent scan at the first and fourth hour after hepatic arterial injection of99m Tc-MAA. Based on single-photon emission computed tomography images, LSF values were measured from each patient's first and fourth hour images. PV1 and PV4 were also calculated based on three-dimensional images using 5% and 10% cutoff threshold values and compared with each other. Results: The authors found that the median of LSF4 was statistically significantly higher than LSF1 (3.05 vs. 4.14, p ≤ 0.01). There was no statistically significant difference between PV1 and PV4 on the 10% ( p = 0.72) thresholds. Conclusions: LSF values can be overestimated in case of delayed HAPS, potentially leading to treatment cancellation due to incorrectly high results in patients who could benefit from SIRT. Threshold-based PV values do not significantly change over time; nevertheless, keeping the short interval time would be safer.- Published
- 2024
- Full Text
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43. Taking a Tailored Approach to Material Design: A Mechanistic Study of the Selective Localization of Phase-Separated Graphene Microdomains.
- Author
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He S, Demir B, Bouzy P, Stone N, Ward C, and Hamerton I
- Abstract
To achieve multifunctional properties using nanocomposites, selectively locating nanofillers in specific areas by tailoring a mixture of two immiscible polymers has been widely investigated. Forming a phase-separated structure from entirely miscible molecules is rarely reported, and the related mechanisms to govern the formation of assemblies from molecules have not been fully resolved. In this work, a novel method and the underlying mechanism to fabricate self-assembling, bicontinuous, biphasic structures with localized domains made up of amine-functionalized graphene nanoplatelets are presented, involving the tailoring of compositions in a liquid processable multicomponent epoxy blend. Kinetics studies were carried out to investigate the differences in reactivity of various epoxy-hardener pairs. Molecular dynamics simulations and in situ optical photothermal infrared spectroscopy measurements revealed the trajectories of different components during the early stages of polymerization, supporting the migration (phase behavior) of each component during the curing process. Confirmed by the phase structure and the correlated chemical maps down to the submicrometer level, it is believed that the bicontinuous phase separation is driven by the change of the miscibility between various building blocks forming during polymerization, leading to the formation of nanofiller domains. The proposed morphology evolution mechanism is based on combining solubility parameter calculations with kinetics studies, and preliminary experiments are performed to validate the applicability of the mechanism of selectively locating nanofillers in the phase-separated structure. This provides a simple yet sophisticated engineering model and a roadmap to a mechanism for fabricating phase-separated structures with nanofiller domains in nanocomposite films.
- Published
- 2024
- Full Text
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44. Huge Pseudoaneursym Presenting with Silent Myocardial Infarction and Stroke.
- Author
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Şaşmaz Mİ, Demir B, Uçar M, and Avci A
- Published
- 2024
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45. Electronic Properties of DNA Origami Nanostructures Revealed by In Silico Calculations.
- Author
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Demir B, Akin Gultakti C, Koker Z, Anantram MP, and Oren EE
- Subjects
- Nucleic Acid Conformation, Electrons, Computer Simulation, Nanostructures chemistry, DNA chemistry, Molecular Dynamics Simulation
- Abstract
DNA origami is a pioneering approach for producing complex 2- or 3-D shapes for use in molecular electronics due to its inherent self-assembly and programmability properties. The electronic properties of DNA origami structures are not yet fully understood, limiting the potential applications. Here, we conduct a theoretical study with a combination of molecular dynamics, first-principles, and charge transmission calculations. We use four separate single strand DNAs, each having 8 bases (4 × G
4 C4 and 4 × A4 T4 ), to form two different DNA nanostructures, each having two helices bundled together with one crossover. We also generated double-stranded DNAs to compare electronic properties to decipher the effects of crossovers and bundle formations. We demonstrate that density of states and band gap of DNA origami depend on its sequence and structure. The crossover regions could reduce the conductance due to a lack of available states near the HOMO level. Furthermore, we reveal that, despite having the same sequence, the two helices in the DNA origami structure could exhibit different electronic properties, and electrode position can affect the resulting conductance values. Our study provides better understanding of the electronic properties of DNA origamis and enables us to tune these properties for electronic applications such as nanowires, switches, and logic gates.- Published
- 2024
- Full Text
- View/download PDF
46. Geriatric nutritional risk index and controller nutritional status score before metastatic first-line chemotherapy predict survival in patients over 70 years of age with metastatic bladder cancer.
- Author
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Balçık OY, Demir B, Ilhan Y, and Akagündüz B
- Abstract
Introduction: Several prognostic factors have been identified in patients with metastatic bladder cancer (BC). As it is known, older adult patients are prone to nutritional deficiency. The knowledge about nutrition and impact on survival in older patients with metastatic bladder cancer is missing. It is necessary to specifically examine this population. Because timely interventions can make a positive impact on this patients population. This retrospective study aimed to evaluate the prognostic effect of the Geriatric Nutritional Risk Index (GNRI), Controller Nutritional Status (CONUT) score and Prognostic Nutritional Index (PNI) before first-line chemotherapy in the metastatic stage in patients with metastatic bladder cancer over 70., Participants and Methods: Patients over 70 with pathologically confirmed denovo metastatic or recurrent metastatic bladder cancer were included in the study. Patients with infections diagnosed at the time of diagnosis, autoimmune diseases or history of steroid use were excluded. Since our population consists of a specific age group with a specific cancer, we found a new cut-off value by performing ROC analysis to ensure optimal sensitivity and specificity in terms of progression. Low GNRI value was related with poor nutritional status. Low PNI value was related with poor nutritional status and high CONUT score was related with poor nutritional status. Factors predicting overall survival (OS) and Progression-Free Survival (PFS) were assessed using both univariate and multivariate Cox proportional hazards analyses., Results: 106 patients were included in the study and the average age was 75.5 years. In the GNRI-Low group, PFS was significantly shorter than that in the GNRI-High group [HR (95% CI) = 57.1 (12.8-255.5), ( p < 0.001)]. Among those with a low-CONUT score, PFS was found to be longer than that in the high-CONUT group [HR (95% CI) = 1.7 (1.0-3.0), ( p = 0.039)]. The median PFS of the PNI-Low group wasn't significantly shorter than that of the PNI-High group [HR (95% CI) = 1.8 (0.5-6.2), ( p = 0.359)]., Conclusion: Our study suggests that the GNRI and CONUT scores are useful for predicting survival in patients over 70 years of age with BC., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2024 Balçık, Demir, Ilhan and Akagündüz.)
- Published
- 2024
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47. The violence profile of male mentally disordered offenders in a high secure unit in Turkiye.
- Author
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Kilic-Demir B, Kizilpinar SC, and Polat S
- Subjects
- Humans, Male, Adult, Mental Disorders psychology, Mental Disorders epidemiology, Middle Aged, Criminals psychology, Schizophrenia, Antisocial Personality Disorder psychology, Antisocial Personality Disorder epidemiology, Substance-Related Disorders psychology, Substance-Related Disorders epidemiology, Young Adult, Bipolar Disorder psychology, Intellectual Disability psychology, Comorbidity, Violence psychology
- Abstract
Our knowledge of the severity and reoffending is limited for mentally disordered offenders, and studies generally evaluate without separation between different diagnostic groups. It was aimed to determine the general profile of mentally disordered offenders who are inpatients in a high secure psychiatry unit from Turkiye and to evaluate the factors associated with violence profiles among different diagnostic groups. According to the results the schizophrenia patients committed the most severe crimes, and intellectual disability patients had some different features from schizophrenia and bipolar disorder patients. History of substance misuse in the intellectual disability group (p = 0,045) and comorbid antisocial personality disorder in the bipolar disorder group (p = 0,015) were associated with increased crime severity. Substance misuse history, history of substance use during the crime, and the existence of comorbid antisocial personality disorder were associated with increased offenses in each of the three diagnosis groups. Living alone (p = 0,004) and having a suicide history (p= 0,052) were associated with the high number of offenses in the schizophrenia group. This study is the first study that compares three diagnostic groups to involve a large patient group. We believe that clinicians must evaluate these parameters for the violence risk assessment of patients., Competing Interests: Declaration of competing interest Baris Kilic Demir has declared conflict of interest. Selma Cilem Kizilpinar has declared conflict of interest. Selim Polat has declared conflict of interest., (Copyright © 2024 Elsevier Ltd. All rights reserved.)
- Published
- 2024
- Full Text
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48. Multi-Label Noise Robust Collaborative Learning for Remote Sensing Image Classification.
- Author
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Aksoy AK, Ravanbakhsh M, and Demir B
- Abstract
The development of accurate methods for multi-label classification (MLC) of remote sensing (RS) images is one of the most important research topics in RS. The MLC methods based on convolutional neural networks (CNNs) have shown strong performance gains in RS. However, they usually require a high number of reliable training images annotated with multiple land-cover class labels. Collecting such data is time-consuming and costly. To address this problem, the publicly available thematic products, which can include noisy labels, can be used to annotate RS images with zero-labeling cost. However, multi-label noise (which can be associated with wrong and missing label annotations) can distort the learning process of the MLC methods. To address this problem, we propose a novel multi-label noise robust collaborative learning (RCML) method to alleviate the negative effects of multi-label noise during the training phase of a CNN model. RCML identifies, ranks, and excludes noisy multi-labels in RS images based on three main modules: 1) the discrepancy module; 2) the group lasso module; and 3) the swap module. The discrepancy module ensures that the two networks learn diverse features, while producing the same predictions. The task of the group lasso module is to detect the potentially noisy labels assigned to multi-labeled training images, while the swap module is devoted to exchange the ranking information between two networks. Unlike the existing methods that make assumptions about noise distribution, our proposed RCML does not make any prior assumption about the type of noise in the training set. The experiments conducted on two multi-label RS image archives confirm the robustness of the proposed RCML under extreme multi-label noise rates. Our code is publicly available at: https://www.noisy-labels-in-rs.org.
- Published
- 2024
- Full Text
- View/download PDF
49. LGBTI Healthcare in Medical Education.
- Author
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Elboga G, Kocamer Sahin S, Demir B, Ozdamar Unal G, Alparslan B, Altıntaş E, Marangoz TK, Guneyligil Kazaz T, and Altindag A
- Subjects
- Male, Female, Humans, Delivery of Health Care, Attitude, Sexual and Gender Minorities, Students, Medical, Education, Medical
- Abstract
Abstract: Our aim is to reveal the interaction of cultural and religious influences with professional equipment by determining the level of knowledge, sexual attitudes, and homophobia of medical students about LGBTI+ individuals. The study included 324 students from our faculty of medicine. The Hudson and Ricketts Homophobia scale, the Attitudes Towards Lesbians and Gay Men scale, and the Hendrick Sexual Attitudes scale were used with the sociodemograpic data form. Data were collected and analyzed using descriptive and inferential statistical tests. The mean score of the students from the Hudson and Ricketts Homophobia scale was 58.50. The findings of our study support that medical students consider that the education they receive in this regard is inadequate. One of the goals of undergraduate medical education is the provision of health services to all segments of society; therefore, it is recommended to make improvements in the curriculum in this regard., (Copyright © 2024 Wolters Kluwer Health, Inc. All rights reserved.)
- Published
- 2024
- Full Text
- View/download PDF
50. Complement gene mutations in children with C3 glomerulopathy: do they affect the response to mycophenolate mofetil?
- Author
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Günay N, Dursun İ, Gökçe İ, Akbalık Kara M, Tekcan D, Çiçek N, Torun Bayram M, Koyun M, Dinçel N, Dursun H, Saygılı S, Yürük Yıldırım ZN, Yüksel S, Dönmez O, Yel S, Demircioğlu Kılıç B, Aydoğ Ö, Atmış B, Çaltık Yılmaz A, Bakkaloğlu SA, Aytaç MB, Taşdemir M, Kasap Demir B, Soylu A, Çomak E, Kantar Özşahin A, Kaçar A, Canpolat N, Yılmaz A, Girişgen İ, Akkoyunlu KB, Alpay H, and Poyrazoğlu HM
- Subjects
- Humans, Child, Complement C3 genetics, Mycophenolic Acid therapeutic use, Mutation, Glomerulonephritis, Membranoproliferative pathology, Glomerulonephritis drug therapy, Kidney Failure, Chronic, Kidney Diseases drug therapy
- Abstract
Background: C3 glomerulopathy (C3G) is a complement-mediated disease. Although genetic studies are not required for diagnosis, they are valuable for treatment planning and prognosis prediction. The aim of this study is to investigate the clinical phenotypes, kidney survival, and response to mycophenolate mofetil (MMF) treatment in pediatric C3G patients with and without mutations in complement-related genes., Methods: Sixty pediatric C3G patients were included, divided into two groups based on complement-related gene mutations. Demographic and clinical-pathological findings, treatment modalities, and outcome data were compared, and Kaplan-Meier analysis was performed for kidney survival., Results: Out of the 60 patients, 17 had mutations. The most common mutation was in the CFH gene (47%). The mean age at diagnosis was higher in the group with mutation (12.9 ± 3.6 vs. 11.2 ± 4.1 years, p = 0.039). While the patients without mutation most frequently presented with nephritic syndrome (44.2%), the mutation group was most likely to have asymptomatic urinary abnormalities (47.1%, p = 0.043). Serum parameters and histopathological characteristics were similar, but hypoalbuminemia was more common in patients without mutation. During 45-month follow-up,10 patients progressed to chronic kidney disease stage 5 (CKD5), with 4 having genetic mutation. The time to develop CKD5 was longer in the mutation group but not significant. MMF treatment had no effect on progression in either group., Conclusions: This study is the largest pediatric C3G study examining the relationship between genotype and phenotype. We showed that the mutation group often presented with asymptomatic urinary abnormalities, was diagnosed relatively late but was not different from the without mutation group in terms of MMF treatment response and kidney survival., (© 2023. The Author(s), under exclusive licence to International Pediatric Nephrology Association.)
- Published
- 2024
- Full Text
- View/download PDF
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