14 results on '"Tasdoven I"'
Search Results
2. Effects of ozone oxidative preconditioning on radiation-induced organ damage in rats
- Author
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Gultekin, F. A., primary, Bakkal, B. H., additional, Guven, B., additional, Tasdoven, I., additional, Bektas, S., additional, Can, M., additional, and Comert, M., additional
- Published
- 2012
- Full Text
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3. Intragastric botulinum toxin injection: a promising alternative for obesity treatment?
- Author
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Balbaloglu H, Tasdoven I, and Yorgancioglu I
- Abstract
Introduction: Over the past 50 years, the rise in obesity has prompted a search for new treatments. Intragastric injections of botulinum toxin A (BT-A), a safer alternative to surgery, show promise in reducing weight and caloric intake by inducing early satiety. This study examines their efficacy for weight loss., Material and Methods: From 2021 to 2023, we conducted a retrospective analysis of patients who underwent intragastric BT-A injections in a general surgery endoscopy unit. The inclusion criteria were being aged 18-65 and having a body mass index (BMI) over 25 kg/m
2 . Patients with specific medical conditions or incomplete records were excluded. We monitored patient weight and BMI values before the procedure and at monthly intervals, with further assessments conducted in the sixth month, including appetite and patient satisfaction., Results: Our study on 67 patients, predominantly female (82.1%), aged 35.5 ±9.0 years with a mean BMI of 33.5 ±3.3 kg/m², examined BT-A injections' effectiveness. 58.2% received injections in both gastric antrum and fundus regions, showing greater weight loss (mean: 10.7 ±7.0 kg) than those treated in the antrum alone. Side effects occurred in 16.4%, with various symptoms. High dietary compliance (80.6%) correlated with weight loss, especially among those reporting intense satiety. Patient satisfaction positively correlated with weight loss, highlighting treatment efficacy and patient response to dual-region injections., Conclusions: Our study suggested that intragastric BT-A injections in the antrum and fundus are effective and safe for satiety and weight loss, with few side effects. Individual responses vary, and diet adherence is crucial. More studies are needed to assess the treatment's efficacy in obesity., Competing Interests: The authors declare no conflict of interest., (Copyright: © 2024 Termedia & Banach.)- Published
- 2024
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4. Impact of magnesium on intraperitoneal adhesion in an experimental rat model.
- Author
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Balbaloglu H, Isik E, Tasdoven I, Turan I, and Cakmak GK
- Abstract
Background: Intraperitoneal adhesions are fibrous bands that form between tissues and organs in the abdominal cavity, which can result from the body's healing process after surgery, leading to pain, bowel obstruction, and infertility in severe cases. Magnesium (Mg), known for its anti-inflammatory and anticoagulant properties, has been hypothesized to influence adhesion formation., Objectives: This study is designed to explore the hypothesized benefits of Mg, known for its anti-inflammatory and anticoagulant properties, on the prevention of intraperitoneal adhesions that commonly occur following abdominal surgeries. It seeks to provide a comprehensive understanding of Mg's potential role in mitigating adhesion formation, aiming to contribute valuable insights into postoperative recovery processes and outcomes., Material and Methods: We employed an experimental model of intestinal abrasion in male Wistar rats. The rats were categorized into control and treatment groups, with the latter receiving varying doses of Mg sulfate. Intraperitoneal adhesions were induced using a multi-abrasion model., Results: Based on both the Evans model and histopathological evaluations, it was observed that there were significant differences in adhesion scores between the groups. Magnesium-treated groups showed significantly fewer adhesions than the control group. Histopathological analyses indicated variations in adhesion characteristics and inflammatory responses among the groups., Conclusions: Preliminary results indicated the potential role of Mg in mitigating postoperative intraperitoneal adhesions. These findings suggest the need for further research to confirm the efficacy of Mg and to explore its mechanisms of action in clinical settings.
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- 2024
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5. A comparative study of learning curves among general surgery residents for intraoperative ultrasound-guided breast-conserving surgery.
- Author
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Balbaloglu H, Tekin H, Yorgancioglu I, Tasdoven I, Tali U, Comert M, and Karadeniz Cakmak G
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- Humans, Female, Middle Aged, Prospective Studies, Adult, Aged, Margins of Excision, General Surgery education, Clinical Competence, Surgery, Computer-Assisted methods, Surgery, Computer-Assisted education, Learning Curve, Mastectomy, Segmental methods, Mastectomy, Segmental education, Breast Neoplasms surgery, Breast Neoplasms diagnostic imaging, Breast Neoplasms pathology, Internship and Residency
- Abstract
Breast-conserving surgery (BCS) followed by radiotherapy is preferred for early-stage breast cancer because its survival rate is equivalent to that of mastectomy. Achieving negative surgical margins in BCS is crucial to minimize the risk of recurrence. Intraoperative ultrasound (IOUS) enhances surgical accuracy, but its efficacy is operator dependent. This study aimed to compare the success of achieving negative margins using IOUS between an experienced breast surgeon and general surgical residents and to evaluate the learning curve for the residents. A prospective study involving 96 patients with BCS who underwent IOUS guidance was conducted. Both the breast surgeon and residents assessed the surgical margins using IOUS, with the breast surgeon making the final margin adequacy decision. Permanent histopathological analysis was used to confirm the status of the margins and was considered the gold standard for comparison. The breast surgeon accurately assessed the margin status in all 96 cases (100% accuracy), with 93 negative and three positive margins. All of these were ductal carcinomas in situ. Initially, the residents demonstrated low accuracy rates in predicting margin positivity using intraoperative ultrasonography. However, the learning curves of the three residents demonstrated that, with an average 12th case onwards, a significant improvement in the cumulative accuracy rates was observed, which reached the level of the breast surgeon. IOUS is an effective tool for accurately predicting the margin status in BCS, with an acceptable learning curve for novice surgeons. Training and experience are pivotal for optimizing surgical outcomes. These findings support the integration of IOUS training into surgical education programs to enhance proficiency and improve patient outcomes., (© 2024. The Author(s).)
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- 2024
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6. Impact of Laparoscopic Sleeve Gastrectomy on Fatigue in Obese Patients.
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Tasdoven I and Balbaloglu H
- Abstract
Background: Fatigue with obesity negatively affects the motivation to lose weight and causes failure of treatment. So, obesity and fatigue are two related entities that worsen each other in a vicious circle. This study aimed to examine the changes in fatigue levels in obese patients undergoing laparoscopic sleeve gastrectomy (LSG). Methods: Preoperative and postoperative BMI, fat percentage, and obesity degree were determined based on Tanita test results, and the rates of change were calculated. The Fatigue Assessment Scale (FAS) was used to assess the impact of obesity on mental and physical fatigue. Results: Six months after LSG, there was a 29.7% decrease in Body Mass Index (BMI) across all patients (45.0 to 31.4, p < 0.001). Significant reductions in the percentage of body fat, obesity grade, and HgA1C were observed in both women and men and overall ( p < 0.001 for all comparisons). Scores on the Fatigue Assessment Scale (FAS) for total, mental, and physical scales decreased significantly for women, men, and all participants ( p < 0.001 for all comparisons). There was a weak but significant positive correlation between the percentage change in FAS total and FAS physical scale scores and the change in BMI% ( p = 0.015 and 0.004; r = 0.089, 0.106, respectively). Change in obesity grade and FAS physical subscale scores negatively correlated ( p = 0.029, r = 0.080). Conclusions: LSG not only leads to significant weight reduction but also improves fatigue levels in patients with obesity.
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- 2024
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7. Parathyroid fine needle aspiration with PTH washout: Can it lead to parathyroid cell seeding in primary hyperparathyroidism?
- Author
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Balbaloglu H, Deniz O, Ozaydin RY, Tasdoven I, and Karadeniz Cakmak G
- Subjects
- Humans, Biopsy, Fine-Needle adverse effects, Biopsy, Fine-Needle methods, Calcium, Parathyroid Hormone, Retrospective Studies, Adenoma surgery, Hyperparathyroidism, Primary diagnosis, Hyperparathyroidism, Primary surgery
- Abstract
Although parathyroid fine-needle aspiration (P-FNA) with parathyroid hormone (PTH) washout is effective in detecting preoperative parathyroid lesions, it also presents risks such as fibrosis, hematoma, and, in rare cases, tumor seeding. This study aimed to investigate whether P-FNA with PTH washout leads to the seeding of parathyroid cells along the path of the needle. A retrospective analysis was conducted on patients undergoing minimally invasive parathyroidectomy guided by preoperative PTH washout. Permanent pathology reports, imaging data, and postoperative serum parathyroid hormone and calcium levels were assessed to determine the effectiveness and safety of the procedure. Complications following P-FNA with PTH washout were also reviewed using data from the patient registration system of Bulent Ecevit University. The procedure accurately localized parathyroid adenomas in 87 patients who underwent ultrasound-guided parathyroidectomy following preoperative P-FNA and PTH washout. Postoperatively, 75 patients showed normal parathyroid hormone and calcium levels. Two patients required secondary surgery for contralateral adenomas. Critically, there was no evidence of P-FNA with PTH washout-induced parathyromatosis or seeding during the follow-up. Effective adenoma localization is crucial for successful minimally invasive surgery of hyperparathyroidism. Our study indicates that combining preoperative P-FNAB with PTH washout and imaging enhances adenoma detection, especially when intraoperative PTH measurements are not available, thus improving surgical outcomes. Notably, we found no evidence of cell implantation after P-FNA, suggesting the safety and efficacy of this method for preventing parathyroid cell seeding., Competing Interests: The authors have no funding and conflicts of interest to disclose., (Copyright © 2024 the Author(s). Published by Wolters Kluwer Health, Inc.)
- Published
- 2024
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8. Predicting coexisting thyroid cancer with primary hyperparathyroidism in an endemic region of multinodular goiter: evaluating the effectiveness of preoperative inflammatory markers.
- Author
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Balbaloglu H, Tasdoven I, Buyukuysal MC, Karadeniz E, Comert M, and Cakmak GK
- Abstract
Purpose: The aim is to examine the efficacy of inflammatory indicators to predict thyroid cancer in patients with primary hyperparathyroidism (PHPT) in an endemic region of nodular goiter., Methods: The prospective database was reviewed to identify patients operated on with the diagnosis of PHPT and thyroid disease between April 2015 and June 2021. Permanent pathologic reports were used as the gold standard for diagnosis. Detailed imaging data with peripheral blood inflammation indices were analyzed to assess their predictive values for concomitant PHPT with thyroid cancer. Postoperative complications and the duration of hospitalization were also reviewed., Results: Thyroid malignancy accompanying PHPT was found in 13 patients (26.0%) out of 50 who had concurrent surgery. The analysis regarding inflammatory indexes revealed nothing significant between thyroid cancer and preoperative blood biochemistry (P > 0.05). In the concurrent surgery group, recurrent laryngeal nerve injury was observed in 1 patient (2.0%) and the mean hospital stay was longer., Conclusion: In endemic regions of nodular thyroid disease, thyroid cancer might accompany PHPT. The value of inflammatory indexes to predict thyroid malignancy in PHPT is controversial and should not be employed in the surgical decision-making process., Competing Interests: Conflict of Interest: No potential conflict of interest relevant to this article was reported., (Copyright © 2023, the Korean Surgical Society.)
- Published
- 2023
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9. Can inflammatory indices predict sentinel lymph node status in patients with early-stage breast cancer?
- Author
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Balbaloglu H, Tasdoven I, and Karadeniz Cakmak G
- Subjects
- Humans, Female, Sentinel Lymph Node Biopsy, Lymph Nodes, Sentinel Lymph Node, Breast Neoplasms, Lymphadenopathy
- Abstract
Breast cancer research has focused on the early detection and treatment of breast cancer. Axillary lymph node status is essential for primary breast cancer staging, recurrence, and survival. The current quest for precision medicine is to identify predictive markers that offer the advantage of individualized treatment options. This study aimed to investigate the value of inflammatory indices in predicting positive sentinel nodes in breast cancer. We studied 602 patients with early-stage breast cancer who underwent sentinel lymph node biopsies (SLNB) at the Bülent Ecevit University General Surgery Clinic. We obtained data, including the clinical and demographic characteristics of the patients, such as age, histological type, and sentinel lymph nodes. Neutrophil, lymphocyte, platelet, and monocyte counts were obtained from preoperative complete blood count test data from the patient registry. The neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR), lymphocyte-to-monocyte ratio (LMR), systemic inflammatory index (SII), and sentinel lymph node biopsy were analyzed. Sentinel LAP was negative in 391 (65%) patients and positive in 211 (35%). In the receiver operating characteristic curve analysis, no significant difference was found between SLNB positivity and negativity in terms of NLR, PLR, LMR, or SII. In contrast to previous research, NLR, PLR, LMR, or SII did not affect SLNB positivity prediction in our study., Competing Interests: The authors have no funding and conflicts of interest to disclose., (Copyright © 2023 the Author(s). Published by Wolters Kluwer Health, Inc.)
- Published
- 2023
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10. Triple mapping for axillary staging after neoadjuvant therapy: Axillary reverse mapping with indocyanine green and dual agent sentinel lymph node biopsy.
- Author
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Tasdoven I, Balbaloglu H, Erdemir RU, Bahadir B, and Guldeniz Karadeniz C
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- Humans, Female, Indocyanine Green, Neoadjuvant Therapy, Axilla pathology, Lymph Nodes pathology, Lymph Node Excision methods, Coloring Agents, Sentinel Lymph Node Biopsy methods, Breast Neoplasms surgery, Breast Neoplasms pathology
- Abstract
Axillary staging is 1 of the major issues of current breast cancer management after neoadjuvant systemic therapy (NST). Sentinel lymph node biopsy (SLNB) is an option for clinically node negative patients. Axillary reverse mapping (ARM) was introduced to identify and preserve the lymphatic drainage from the arm. The aim of the presented study is to employ triple mapping (radiocolloid, blue dye and indocyanine green [ICG]) to assess the crossover rate and metastatic involvement of ARM nodes after NST. Clinically node positive patients before NST who were converted to N0 and scheduled for targeted axillary dissection were included. sentinel lymph node (SLN) mapping was performed via dual agent mapping. ICG was used for ARM procedure. Blue, hot and fluorescent nodes and lymphatics were visualized in the axilla using infrared camera system and dual opto-nuclear probe (Euoroprobe3). Fifty-two patients underwent targeted axillary dissection and ARM procedures 12 out of whom had axillary node dissection. 45 of the 52 patients had at least 1 hot or blue SLN identified intraoperatively. Of these, 61.5% cases had hot SLNs, 42.3% had hot and blue, 15.4% had hot/blue/fluorescent, 7.7% had blue/fluorescent, 6 11.5% had hot/fluorescent and 7 13.5% had only clipped nodes. The overall identification rate of ARM-nodes by means of ICG technique was 86.5%. Overall crossover of ARM nodes with SLNs was determined in 36.5%. The ICG intensity was found to be higher in both hot and blue SLNS (8 out of 18 ICG positive cases, 44.4%). In 3 of 52 patients (5.7%) metastatic SLNs were hot or blue but fluorescent which predicts metastatic involvement of the ARM-nodes. More than 1-third of the patients revealed a crossover between arm and breast draining nodes. The higher observed rate of overlap might partially explain why more patients develop clinically significant lymphedema after NST even after sentinel lymph node biopsy alone. The triple mapping provides valuable data regarding the competency of lymphatic drainage and would have the potential to serve selecting patients for lymphovenous by-pass procedures at the index procedure. NST reduces the metastatic involvement of the ARM nodes. However, conservative axillary staging with sparing ARM nodes after NST necessitates further studies with larger sample size and longer follow-up., Competing Interests: The authors have no funding and conflicts of interest to disclose., (Copyright © 2022 the Author(s). Published by Wolters Kluwer Health, Inc.)
- Published
- 2022
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11. Diagnostic Accuracy of Axillary Ultrasound for Prediction of Axillary Pathologic Response after Neoadjuvant Treatment in Breast Cancer.
- Author
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Tasdoven I, Erdemir RU, and Cakmak GK
- Subjects
- Axilla diagnostic imaging, Humans, Lymphatic Metastasis, Neoplasm Staging, Positron Emission Tomography Computed Tomography, Retrospective Studies, Sentinel Lymph Node Biopsy, Treatment Outcome, Ultrasonography, Breast Neoplasms diagnostic imaging, Breast Neoplasms surgery, Neoadjuvant Therapy
- Abstract
Background: In the era of NAT, to accurately predict pathologic response is a great challenge, which might influence surgical approach for breast and axilla. Axillary staging via imaging methods as an adjunct have long been used with various reported accuracy rates. However, the role of preoperative axillary ultrasonography (AUS) in clinical N0 patients after NAT is still controversial. The primary goal of the present study was to evaluate the precision of preoperative AUS for identifying pathologic complete response (ypCR = ypT0, ypN0) after NAT. Methods: A single-institution, retrospective review of a prospectively maintained database was analyzed to identify breast cancer patients treated with NAT. Only those patients who underwent AUS and 18F-FDG-PET/CT before and after NAT with documentation of clinical and radiological response were incorporated for outcome analysis. Results: In 253 consecutive invasive breast cancer patients axillary ypN0 disease was achieved in 67.19%. In 11.23% ynon-pCR patients AUS failed to detect residual disease presence 80% of which were ITCs and micrometastases. Macrometastasis was present in 21.73% (55/253) of the cases 98.18% (54/55) of which was determined by AUS. Overall accuracy for axillary pCR was found to be 89.32% for AUS and 76.28 % for 18-FDG-PET/CT. The false negative rate (FNR) of AUS and 18-FDG-PET/CT was 12.04% and 15.59%, respectively. The PPV of AUS was higher in Luminal-like tumors (%87.69), whereas HER-2 positive (%100) and triple-negative (93.47%) subtypes had higher NPV. Conclusions: AUS is a beneficial tool with the potential of accurate prediction of pCR in more than 80% of patients following NAT. Nevertheless, in cases of residual ITCs and micrometastasis the accuracy of US should be interrogated cautiously., (Celsius.)
- Published
- 2021
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12. Is Subdivision of Atypia of Undetermined Significance AUS/Follicular Lesion of Undetermined Significance Cases According to Detailed Nuclear Features Vital for Assessing the Risk of Malignancy?
- Author
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Kaymaz E, Gun BD, Tasdoven I, and Kokturk F
- Abstract
Background: It has been known that the "atypia of undetermined significance (AUS)/follicular lesion of undetermined significance (FLUS)" category is the most problematic category in Bethesda system due to its highly heterogeneous morphological features. Recently, it has been reported that aspirates including nuclear atypia in the AUS/FLUS category have a higher risk of malignancy., Aims: This study aimed to assess each nuclear property in aspirates with cytological atypia and also to determine the relationship with the risk of malignancy., Material and Methods: We reviewed 980 AUS/FLUS fine-needle aspirations (FNAs) performed between '2012 and 2019' at a single institution. We classified these aspirates into four groups: AUS-N (nuclear atypia), AUS-A (architectural atypia), AUS-H (Hurthle cell change), and AUS-O (other). Nuclear features were detailed sub-classified; size and shape (enlargement, elongation, and overlapping), membrane irregularities (irregular contours, grooves, pseudoinclusion), and chromatin characteristics (pale chromatin). The estimated risk of malignancy (ROM) was calculated for each subgroup., Results: Of 980 AUS/FLUS cases, follow-up histological outcome data were available for 209 cases. Among these cases, the estimated ROM was 27.8%. The ROM were 26.4%, 15.4%, and 22.5% for AUS-N, A, and H, respectively. The most common nuclear findings associated with ROM were nuclear groove (67.9%); irregular contours (76.9%) suspected pseudoinclusion (100%) and overlapping (56%) ( P < 0,001). But nuclear findings such as nuclear enlargement, mild pleomorphism, or pale chromatin have a similar ROM as architectural atypia., Conclusion: Although it is known that the presence of cytological atypia in an AUS/FLUS nodule increases the estimated risk of malignancy, all nuclear properties are not equally effective in predicting malignancy risk. Emphasizing nuclear atypia details in reports of AUS case may be a more sensitive way to identify nodules with a high risk of malignancy., Competing Interests: There are no conflicts of interest., (Copyright: © 2020 Journal of Cytology.)
- Published
- 2020
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13. Breast cancer surgery under the shadow of COVID-19: Quest for optimal axillary management after neo-adjuvant chemotherapy.
- Author
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Tasdoven I and Karadeniz Cakmak G
- Subjects
- Adult, Axilla, Breast Neoplasms drug therapy, Breast Neoplasms pathology, COVID-19, Chemotherapy, Adjuvant, Female, Humans, Lymph Node Excision, Middle Aged, Pandemics, SARS-CoV-2, Sentinel Lymph Node Biopsy, Betacoronavirus, Breast Neoplasms surgery, Coronavirus Infections epidemiology, Pneumonia, Viral epidemiology
- Published
- 2020
- Full Text
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14. Effects of ozone oxidative preconditioning on radiation-induced organ damage in rats.
- Author
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Gultekin FA, Bakkal BH, Guven B, Tasdoven I, Bektas S, Can M, and Comert M
- Subjects
- Animals, Female, Free Radical Scavengers therapeutic use, Multiple Organ Failure etiology, Oxidants, Photochemical therapeutic use, Oxidative Stress drug effects, Oxidative Stress radiation effects, Radiation Injuries etiology, Radiation Injuries pathology, Radiation-Protective Agents therapeutic use, Rats, Rats, Wistar, Treatment Outcome, Multiple Organ Failure pathology, Multiple Organ Failure prevention & control, Ozone therapeutic use, Radiation Injuries prevention & control, Radiation Tolerance drug effects, Whole-Body Irradiation adverse effects
- Abstract
Because radiation-induced cellular damage is attributed primarily to harmful effects of free radicals, molecules with direct free radical scavenging properties are particularly promising as radioprotectors. It has been demonstrated that controlled ozone administration may promote an adaptation to oxidative stress, preventing the damage induced by reactive oxygen species. Thus, we hypothesized that ozone would ameliorate oxidative damage caused by total body irradiation (TBI) with a single dose of 6 Gy in rat liver and ileum tissues. Rats were randomly divided into groups as follows: control group; saline-treated and irradiated (IR) groups; and ozone oxidative preconditioning (OOP) and IR groups. Animals were exposed to TBI after a 5-day intraperitoneal pretreatment with either saline or ozone (1 mg/kg/day). They were decapitated at either 6 h or 72 h after TBI. Plasma, liver and ileum samples were obtained. Serum AST, ALT and TNF-α levels were elevated in the IR groups compared with the control group and were decreased after treatment with OOP. TBI resulted in a significant increase in the levels of MDA in the liver and ileal tissues and a decrease of SOD activities. The results demonstrated that the levels of MDA liver and ileal tissues in irradiated rats that were pretreated with ozone were significantly decreased, while SOD activities were significantly increased. OOP reversed all histopathological alterations induced by irradiation. In conclusion, data obtained from this study indicated that ozone could increase the endogenous antioxidant defense mechanism in rats and there by protect the animals from radiation-induced organ toxicity.
- Published
- 2013
- Full Text
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