17 results on '"Haris Hatic"'
Search Results
2. Real World Outcomes of Brentuximab Vedotin Maintenance after Autologous Stem Cell Transplant in Relapsed/Refractory Classical Hodgkin Lymphoma: An Time-Variable Analysis of the Effect of Dose on Progression Free Survival
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Charlotte B Wagner, Daniel A. Ermann, Ken Boucher, Adrienne N. Nedved, Ivana N. Micallef, Sanjal H Desai, Haris Hatic, Gaurav Goyal, Erin Zacholski, Amanda Fegley, Audrey M. Sigmund, David A. Bond, Courtney Samuels, Manali K. Kamdar, Sheeba Ba Aqeel, Pallawi Torka, Kira MacDougall, Azra Borogovac, Sridevi Rajeeve, Suchitra Sundaram, Kalub Fedak, Dipenkumar Modi, Elizabeth Travers, Sabarish Ayyappan, Nitin Chilakamarri, Elizabeth A Brem, Deborah M. Stephens, Boyu Hu, Lindsey A. Fitzgerald, and Harsh Shah
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Immunology ,Cell Biology ,Hematology ,Biochemistry - Published
- 2022
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3. Outcomes of Relapsed Refractory Double Hit Lymphoma: A Multicenter Observational Cohort
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Sanjal H Desai, Marcus P. Watkins, Reem Karmali, Gaurav Goyal, Mitchell Hughes, Arushi Khurana, Francisco Hernandez-Ilizaliturri, Nuttavut Sumransub, Joanna Zurko, Imran A. Nizamuddin, Haris Hatic, Daniel A Landsburg, Andrea Anampa-Guzman, Mehdi Hamadani, Yi Lin, Iris Isufi, Aung M Tun, Brian T. Hill, Deborah M. Stephens, Paolo F Caimi, Daniel A. Ermann, Brad S. Kahl, and Grzegorz S. Nowakowski
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Immunology ,Cell Biology ,Hematology ,Biochemistry - Published
- 2022
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4. Effect of cumulative dose of brentuximab vedotin maintenance in relapsed/refractory classical Hodgkin lymphoma after autologous stem cell transplant: an analysis of realworld outcomes
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Charlotte B. Wagner, Ken Boucher, Adrienne Nedved, Ivana N Micallef, Sanjal Desai, Haris Hatic, Gaurav Goyal, Erin Zacholski, Amanda Fegley, Audrey M. Sigmund, David A. Bond, Courtney Samuels, Manali K. Kamdar, Sheeba Ba Aqeel, Pallawi Torka, Kira MacDougall, Azra Borogovac, Sridevi Rajeeve, Suchitra Sundaram, Kalub Fedak, Dipenkumar Modi, Elizabeth Travers, Sabarish Ayyappan, Nitin Chilakamarri, Elizabeth A. Brem, Daniel A. Ermann, Lindsey A. Fitzgerald, Boyu Hu, Deborah M. Stephens, and Harsh Shah
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Hematology - Abstract
Sixteen cycles of Brentuximab vedotin (BV) after autologous stem cell transplant (ASCT) in high-risk relapsed/refractory classical Hodgkin lymphoma (r/r cHL) demonstrated an improved 2-year progression free survival (PFS) over placebo. However, most patients are unable to complete all 16 cycles at full dose due to toxicity. This retrospective, multicenter study investigated the effect of cumulative maintenance BV dose on 2-year PFS. Data were collected from patients who received at least one cycle of BV maintenance after ASCT with one of the following high-risk features: primary refractory disease (PRD), extra-nodal disease (END), or relapse < 12 months (RL 75% of the planned total cumulative dose, cohort 2 with 51 – 75% of dose, and cohort 3 with ≤ 50% of dose. The primary outcome was 2-year PFS. A total of 118 patients were included. Fifty percent had PRD, 29% had RL
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- 2023
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5. Clinical Outcomes in COVID-19 Patients Treated with Immunotherapy
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Haris Hatic, Kristine R. Hearld, Devika Das, and Jessy Deshane
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COVID-19 ,immunotherapy ,cancer ,immune checkpoint inhibitors ,Cancer Research ,Oncology - Abstract
Introduction: The full impact of COVID-19 infections on patients with cancer who are actively being treated with chemotherapy or immune checkpoint inhibitors (ICIs) has not been fully defined. Our goal was to track clinical outcomes in this specific patient population. Methods: We performed a retrospective chart review of 121 patients (age > 18 years) at the University of Alabama at Birmingham from January 2020 to December 2021 with an advanced solid malignancy that were eligible to be treated with ICIs or on current therapy within 12 months of their COVID-19 diagnosis. Results: A total of 121 patients were examined in this study, and 61 (50.4%) received immunotherapy treatment within 12 months. One quarter of the patients on ICIs passed away, compared to 13% of the post-chemotherapy cohort. Patients who were vaccinated for COVID-19 had lower mortality compared to unvaccinated patients (X2 = 15.19, p < 0.001), and patients with lower ECOG (0.98) were associated with lower mortality compared to patients with worse functional status (0.98 vs. 1.52; t = 3.20; p < 0.01). Conclusions: COVID-19-related ICI mortality was higher compared to patients receiving chemotherapy. However, ICI cessation or delay is unwarranted as long there has been a risk–benefit assessment undertaken with the patient.
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- 2022
6. Time to first treatment is an independent prognostic factor for Multiple Myeloma (MM)
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Haris Hatic, Shealeigh Inselman, Jonathan Inselman, Anuhya Kommalapati, Sri Harsha Tella, Jonas Paludo, Urshila Durani, Ronald S. Go, and Gaurav Goyal
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Cancer Research ,Oncology ,Humans ,Hematology ,Multiple Myeloma ,Prognosis ,Retrospective Studies - Abstract
Multiple myeloma (MM) is an incurable plasma cell neoplasm. In this study, we aimed to analyze the impact of time to initiation of systemic therapy for MM on overall survival (OS).We identified cases diagnosed with MM from the National Cancer Database from 2004 to 2013.A total of 38,178 MM patients were included in the analysis. The median time to systemic therapy in our cohort was 17 days (range 0-120). The median OS for patients who initiated therapy 30-days after diagnosis was longer than those who received it ≤ 7 days (46 vs. 27-month, p 0.001). On multivariable analysis, patients who received treatment ≤ 7 days from diagnosis had worse mortality compared with those receiving treatment 30 days (HR 1.5; 95% CI 1.4-1.6).In our study, time to initiation of systemic therapy was an independent prognostic factor in MM. Similar to other lymphoid malignancies, this metric may be a surrogate for high-risk disease in MM, and future trials may need to investigate time-to-treatment as a factor to allow enrollment of potentially sick patients.
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- 2022
7. Patterns of Failure and Optimal Treatment Paradigm for Large, Inoperable, Node-Negative Non-small Cell Lung Cancer
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Craig S. Schneider, Haris Hatic, Devika Das, Rex A. Cardan, John M. Stahl, James A. Bonner, and Adam J. Kole
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Pulmonary and Respiratory Medicine ,Cohort Studies ,Cancer Research ,Lung Neoplasms ,Treatment Outcome ,Oncology ,Carcinoma, Non-Small-Cell Lung ,Humans ,Radiosurgery ,Progression-Free Survival ,Retrospective Studies - Abstract
The ideal non-operative treatment for patients with large, node-negative non-small cell lung cancer (NSCLC) is poorly defined. To inform optimal treatment paradigms for this cohort, we examined patterns of failure and the impact of radiation therapy (RT) and chemotherapy receipt.Node-negative NSCLC patients with 5+ cm primary tumors receiving definitive RT at our institution were identified. Sites of initial progression were analyzed. Local progression, regional/distant progression, progression-free survival, and overall survival were analyzed via cumulative incidence function and Kaplan-Meier. Associations between local vs. regional/distant progression with treatment and clinicopathologic variables were assessed via univariable and multivariable competing risks regression.We identified 88 patients for analysis. Among patients with recurrent disease (N = 36), initial patterns of failure analysis showed that isolated distant (27.8%) and isolated regional progression (22.2%) were most common. Distant or regional failure as a component of initial failure was seen in 88.9% of patients who progressed, while isolated local failure was uncommon (11.1%). Univariable and multivariable competing risks regression showed that receipt of SBRT was associated with reduced risk of local progression (HR 0.23, P = .012), and receipt of chemotherapy was associated with reduced risk of regional/distant progression (HR 0.12, P = .040). In conclusion, patients with large, node-negative NSCLC treated with definitive RT are at high risk of regional and distant progression. SBRT correlates with a reduced risk of local failure while chemotherapy is associated with reduced regional/distant progression in this patient population. Ideal treatment may include SBRT when feasible with appropriate systemic therapy.
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- 2022
8. P102: Comparison of Novel Salvage Regimens and Traditional salvage Chemotherapy in Relapsed and Refractory Classic Hodgkin Lymphoma
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Harsh Shah, Victoria Vardell, Erin Zacholski, Amanda Fegley, Kalub Fedak, Suchitra Sundaram, Sridevi Rajeeve, Gaurav Goyal, Haris Hatic, Pallawi Torka, Sheeba Ba Aqeel, Azra Borogovac, Kira Macdougall, Shalin Kothari, Anna Kress, Dipenkumar Modi, Elizabeth Travers, Nitin Chilakamarri, Elizabeth Brem, Deborah M. Stephens, Boyu Hu, Lindsey Fitzgerlad, Charlotte Wagner, and Daniel Ermann
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Hematology - Published
- 2022
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9. SAFETY OF SAME DAY HD‐MTX WITH INDUCTION THERAPY FOR DLBCL WITH CONCURRENT CNS DISEASE OR AS PROPHYLAXIS FOR HIGH RISK OF CNS RELAPSE
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Charles Douglas Bodine, Gaurav Goyal, Brett Barlow, Haris Hatic, Amitkumar Mehta, and Mayur Narkhede
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Oncology ,Cancer Research ,medicine.medical_specialty ,business.industry ,Induction chemotherapy ,Hematology ,General Medicine ,medicine.anatomical_structure ,immune system diseases ,hemic and lymphatic diseases ,Internal medicine ,Induction therapy ,medicine ,Methotrexate ,Cns disease ,business ,B cell ,medicine.drug - Abstract
e19545 Background: High-dose methotrexate (HD-MTX) at a dose between 2.5 to 5 gm/m2 is commonly administered in conjunction with standard induction chemotherapy to patients with Diffuse Large B Cell Lymphoma (DLBCL) at high risk of central nervous system (CNS) relapse, as defined by the Lymphoma International Prognostic Index (CNS-IPI). Optimal timing of HD-MTX in relation to induction chemotherapy is unknown. A recent study suggested that HD-MTX intercalated with R-CHOP cycles was associated with increased toxicity and treatment delays without improvement in survival or CNS relapse compared with end of treatment MTX (Wilson et al 2020). This retrospective study evaluates the toxicities and treatment delays associated with HD-MTX administered on day 1 of cycles of chemo-immunotherapy. Methods: This single center retrospective cohort study included 45 patients (pts) with DLBCL with concurrent CNS disease or at high risk of CNS relapse who received HD MTX on day 1 of chemo-immunotherapy at our center. Data was abstracted from chart review and included variables describing clinical and treatment characteristics, time to MTX clearance, toxicities experienced and treatment delays. Results: 31 pts received HD-MTX on the day of R-CHOP chemotherapy, 6 pts received HD-MTX on the day of R-EPOCH (Rituximab, Etoposide, Doxorubicin, Vincristine, Cyclophosphamide, and Prednisone), and 8 pts received HD-MTX with R-MiniCHOP (dose reduced R-CHOP). Same day HD MTX with chemo-immunotherapy was associated with acute kidney injury (AKI; 17-25%), treatment delays >7 days (13-17%), and grade 2 mucositis (11-50%). The burden of toxicities was numerically higher in patients treated with R-EPOCH vs. R-CHOP (Table). Clinical outcomes are summarized in table below. Conclusions: In our heterogeneous population of pts, we describe that the incidence of toxicities and treatment delays experienced with same day HD-MTX are higher with R-EPOCH than with R-CHOP. Comparative studies with intercalated or end of treatment MTX will determine if the incidence of treatment delays, toxicities and de-escalations are higher with same day HD-MTX administration. [Table: see text]
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- 2021
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10. Outcomes of classic Hodgkin lymphoma, relapsed within one year of diagnosis, in the era of novel agents
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Sanjal Desai, Michael Alexander Spinner, Kevin A. David, Veronika Bachanova, Gaurav Goyal, Raya Saba, Kathleen Anne Dorritie, Jacques Mario Azzi, Elyse Harris, Brendon Fusco, Nuttavut Sumransub, Haris Hatic, Uroosa Ibrahim, Siddharth Iyengar, Katherine Cynthia Rappazzo, Firas Baidoun, Victor Manuel Orellana-Noia, Catherine S. Magid Diefenbach, Ranjana H. Advani, and Ivana N. M. Micallef
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Cancer Research ,Oncology - Abstract
7515 Background: Primary refractory disease (PRD) and early relapse (ER) are predictors of poor prognosis in classic Hodgkin lymphoma (cHL). In this multicenter retrospective study, we describe outcomes of PRD and ER in pts with relapsed/refractory (R/R) cHL treated with salvage therapy (ST) and autologous stem cell transplant (ASCT). Methods: Of 14 sites, adult patients with R/R cHL who received ST and underwent ASCT were enrolled. PRD was defined as progression on frontline chemoimmunotherapy or within 6 months of diagnosis. ER was defined as relapse from 6 months-1 yr of diagnosis. Pts who relapsed >1 yr of diagnosis were called late relapses (LR). Study objectives were Overall response rates (ORR), CR rates, PFS, and OS. Results: Of 986 total pts, 160 had PRD, 365 had ER and 461 had LR. Significantly higher number of pts with PRD, but not ER, had bulky disease (41% vs 27%, p1 line of ST (44% vs 30% vs 23%, p
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- 2022
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11. Clinical outcomes in COVID-19 patients with cancer who are treated with chemo- or immunotherapy
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Haris Hatic, Jenny B Jung, Kristine Ria Hearld, Jessy Deshane, and Devika Govind Das
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Cancer Research ,Oncology - Abstract
e18699 Background: Cancer patients infected with COVID-19 are very vulnerable to increased complications and mortality while actively being treated with chemotherapy or immune checkpoint inhibitors (ICIs). The full impact of COVID-19 infections on this subset of patients has not been fully defined. Our goal was to track clinical outcomes in patients with an underlying malignancy and COVID-19 infection who received chemotherapy or ICIs. Methods: We performed a retrospective chart review of 121 patients (age > 18 years) at the University of Alabama-Birmingham from January 2020 till November 2021 with an advanced solid malignancy that were treated with chemotherapy or ICIs within 12 months of their COVID-19 diagnosis. The aim of this study was to track clinical outcomes including: hospitalization rates, ICU admissions, treatments, and deaths of any cause. Results: A total of 121 patients were examined in this study and 61 received immunotherapy treatment within 12 months. The median age at diagnosis for the ICI group was 62.3 years and 54% were male while for the patients that receive chemotherapy the median age at diagnosis was 65.1 years and 53% were male (Table1). The 3 most common cancers represented in the ICI cohort were lung (30%, NSCLC), liver (13%, HCC) and renal (11%, RCC). While in the chemotherapy group, the 3 most cancers were NSCLC (40%), HCC (12%,), and head & neck (10%, H&N). 25% of patients on ICIs died while only 13% of patients died post chemotherapy. Of the ICI patients that died, 33% were admitted to the intensive care unit (ICU) and 53% received oxygen, steroids and antiviral therapy. For the chemotherapy patients that died, 25% were admitted to the ICU and 50% received oxygen, steroids and antiviral therapy. Patients with lower ECOG (0.98) had lower mortality compared to patients with worse functional status (0.98 vs 1.52; t = 3.20; p < 0.01). Factors associated with increased admission were higher ECOG (1.07 vs 1.67; f = 3.05; p = 0.05), higher AST (21.2 vs 40.9, f = 10.2; p < 0.001), lower absolute lymphocyte count (1122.8 vs 408.9, f = 5.99; p < 0.01) and higher oxygen needs (0.02 vs 1.11, f = 29.5; p < 0.001). Conclusions: ICI mortality was higher compared to patients receiving chemotherapy, especially for those with reduced functional status. Factors for hospitalization included: higher ECOG, higher AST, lower lymphocyte count and increased oxygen needs. However, further investigation still needs to be undertaken to understand if the PD-1-PD-L1 pathway with the subsequent inflammatory cascade post COVID-19 can impact overall survival.[Table: see text]
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- 2022
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12. Factors affecting outcomes in gallbladder cancer: A single institution retrospective analysis
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Haris Hatic, Peng Li, and Ravi Kumar Paluri
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Cancer Research ,Oncology - Abstract
e16109 Background: Gallbladder cancer is one of the highest fatal malignancy. We conducted a retrospective analysis to study the outcomes of gallbladder malignancy in an academic care setting. Methods: Data was collected retrospectively on patients treated at University of Alabama at Birmingham between January 2005 and June 2015 from the electronic medical record using a standardized data collection tool (Redcap). We evaluated for predictors of overall survival (OS) and progression-free survival (PFS). Results: Of the 93 patients in this study, 66% were female. Adjuvant chemotherapy (CT) was given to 11% and adjuvant chemoradiation (CRT) to 14%. On multivariate analysis, albumin > 3.5, uninvolved margins, absence of lymphovascular/peri-neural invasion were independent predictors of OS and PFS (Table). The overall median survival was 24.3 months with a 5-year median OS at 23.7%. Surgery with CRT for the full cohort had a median OS of 54.4 vs 15.6 (p = 0.0048) months compared to surgery CT alone. The OS in stage 3-4 patients with surgery alone vs surgery & CT was 5.5 versus 28.7 months respectively (p = 0.0052). The PFS for the same group was 17.5 vs 4.6 months (p = 0.0052). Conclusions: The dismal survival rates of gallbladder cancer made. adjuvant therapy (CT or CRT) critically important. Concurrent chemoradiation needs to be evaluated in randomized clinical trials for potential improvement in clinical outcomes compared to currently approved standard of care, adjuvant CT alone. [Table: see text]
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- 2022
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13. The Clinical Benefit of Adjuvant Therapy in Long-Term Survival of Early-Stage Ampullary Carcinoma: A Single Institutional Experience
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Grant R. Williams, Peng Li, Haris Hatic, Ashish Manne, Ravi Kumar Paluri, and Rojymon Jacob
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Oncology ,Cancer of ampulla of Vater ,medicine.medical_specialty ,Univariate analysis ,Peri-ampullary cancer ,business.industry ,Proportional hazards model ,medicine.medical_treatment ,Pathological staging ,General Medicine ,Adjuvant treatment ,Pancreaticoduodenectomy ,Radiation therapy ,Ampullary cancer ,Early-stage ampullary cancer ,Internal medicine ,Adverse factors for ampullary cancer ,Adjuvant therapy ,Medicine ,Original Article ,Stage (cooking) ,business ,Chemoradiotherapy ,Post-operative management of ampullary cancer - Abstract
Background: The role of adjuvant chemotherapy (CT) or combination chemoradiation (CRT) remains uncertain for ampullary carcinoma (AC). In this analysis, we reviewed our institution’s experience with early-stage AC. Methods: AC patients who had definitive surgical intervention at the University of Alabama, Birmingham, between 2005 and 2015, were identified. Clinicopathologic factors and disease statuses were obtained from chart review. The univariate Cox proportional hazard model was conducted for evaluating the parameters associated with overall survival (OS). Kaplan-Meier method and log-rank method were used to compare the time-to-events. We estimated the survival for the patients who had definitive surgery (pancreaticoduodenectomy (PD) or ampullectomy), and followed them up with assessing the influence of adjuvant treatment (chemoradiotherapy or CT) alone on the survival in the early-stage (stage I/II) AC. Results: A total of 63 patients had definitive surgery. The median OS and progression-free survival (PFS) for all the patients who had definitive surgery were 40.5 months and 28 months, respectively. Adjuvant treatment was administered in 60% of patients with early-stage (stage I/II) AC (CT 36% and CRT 24%), while 22% were on surveillance post surgery. The pathological stage ? 2, Lymph node (LN) metastasis, peri-nodal extension (PNE) and peri-pancreatic extension (PPE) were found to be the determinants for poor OS and PFS by univariate analysis. Multiple Cox regression of these variables showed a significant influence of PPE and pathological staging on the OS and PFS, respectively. In the early-stage AC with no high-risk features, adjuvant therapy did not improve the survival over surgery alone (40.5 vs. 51.7 months, P = 0.93). The addition of radiation to CT did not yield improved outcome in early-stage cancers. For CRT and CT, OS was 22.8 versus 65.7 months (P = 0.3975), and PFS was 25.3 versus 65.7 months (P = 0.4699). Conclusions: In the early-stage AC, adjuvant therapy may not improve the outcome in the short term but may benefit over a long period. It should be considered, especially in patients with adverse risk factors. Radiation therapy may not be useful in managing AC in the adjuvant setting. J Clin Med Res. 2020;12(9):560-567 doi: https://doi.org/10.14740/jocmr4267
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- 2020
14. Malignancy rate of atypia of undetermined significance/follicular lesion of undetermined significance in thyroid nodules undergoing FNA in a suburban endocrinology practice: A retrospective cohort analysis
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A. Ola Odugbesan, Haris Hatic, Kimberly Carter Bates, Haoran Peng, and Maighan Seagrove-Guffey
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Thyroid nodules ,Male ,Cancer Research ,medicine.medical_specialty ,medicine.medical_treatment ,Cytodiagnosis ,Biopsy, Fine-Needle ,030209 endocrinology & metabolism ,Malignancy ,Thyroid carcinoma ,03 medical and health sciences ,0302 clinical medicine ,Endocrinology ,Adenocarcinoma, Follicular ,medicine ,Atypia ,Atypical Squamous Cells of the Cervix ,Humans ,Thyroid Neoplasms ,Thyroid Nodule ,Practice Patterns, Physicians' ,Retrospective Studies ,business.industry ,General surgery ,Thyroid ,Thyroidectomy ,Retrospective cohort study ,Middle Aged ,medicine.disease ,Prognosis ,Bethesda system for reporting thyroid cytopathology ,medicine.anatomical_structure ,Oncology ,030220 oncology & carcinogenesis ,Female ,business ,Follow-Up Studies - Abstract
BACKGROUND The Bethesda System for Reporting Thyroid Cytopathology (TBSRTC) was created to establish a standard terminology regarding thyroid nodules that can be shared between endocrinologists, pathologists, radiologists, and surgeons. Since its inception and use in 2009, multiple large hospitals and academic institutions have performed retrospective studies to compare their classification rates, specifically those of atypia of undetermined significance (AUS) and follicular lesion of undetermined significance (FLUS), with the recommended rates created by the National Cancer Institute. The current study compared AUS/FLUS rates at a private suburban endocrine practice with those of previous publications from large institutions and the rates established by the National Cancer Institute. METHODS Charts from 893 patients with fine-needle aspiration (FNA) performed in 2015 were reviewed. Data specific to thyroid aspirates classified as AUS/FLUS were organized into whether patients underwent surgery, underwent subsequent repeat FNA, or required continued observation. These results then were calculated to reveal the rate of malignancy in the AUS/FLUS category with surgical pathology in the study institution. RESULTS A total of 893 patients underwent FNA, with 43 patients (4.82%) shown to have AUS/FLUS. A total of 21 patients proceeded to undergo thyroidectomy or lobectomy, with 7 patients (33.3%) found to have papillary or follicular thyroid carcinoma. CONCLUSIONS The rate of use of the AUS/FLUS category for thyroid nodules examined at the study institution was found to be within the recommended range set forth by TBSRTC. However, the malignancy rates on histopathology in the study institution were found to be higher than the new proposed malignancy rates from TBSRTC published in 2017. This finding is comparable to those of multiple other community and academic institutions performed prior to and after institution of the new guidelines.
- Published
- 2018
15. The nuclear factor erythroid 2-like 2 activator, tert-butylhydroquinone, improves cognitive performance in mice after mild traumatic brain injury
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Lital Rachmany, A. Shaer, Haris Hatic, Vardit Rubovitch, Chaim G. Pick, Jessica N. Saykally, and Bruce A. Citron
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Male ,Pathology ,medicine.medical_specialty ,Time Factors ,Cell Survival ,NF-E2-Related Factor 2 ,Proto-Oncogene Proteins c-jun ,Traumatic brain injury ,Central nervous system ,Motor Activity ,Pharmacology ,Neuroprotection ,Antioxidants ,Article ,Rotarod performance test ,Lesion ,Mice ,Neuroblastoma ,Visual memory ,Cell Line, Tumor ,Glial Fibrillary Acidic Protein ,Avoidance Learning ,Animals ,Humans ,Medicine ,HSP70 Heat-Shock Proteins ,RNA, Messenger ,Maze Learning ,Analysis of Variance ,Mice, Inbred ICR ,Caspase 3 ,business.industry ,Activator (genetics) ,General Neuroscience ,Brain ,Recognition, Psychology ,Purine Nucleosides ,medicine.disease ,Hydroquinones ,Hsp70 ,Disease Models, Animal ,medicine.anatomical_structure ,Gene Expression Regulation ,Brain Injuries ,Rotarod Performance Test ,medicine.symptom ,Cognition Disorders ,business - Abstract
Traumatic Brain injury affects at least 1.7 million people in the United States alone each year. The majority of injuries are categorized as mild but these still produce lasting symptoms that plague the patient and the medical field. Currently treatments are aimed at reducing a patient’s symptoms, but there is no effective method to combat the source of the problem, neuronal loss. We tested a mild, closed head traumatic brain injury model for the effects of modulation of the antioxidant transcription factor Nrf2 by the chemical activator, tert-butylhydroquinone (tBHQ). We found that post-injury visual memory was improved by a 7 day course of treatment and that the level of activated caspase-3 in the hippocampus was reduced. The injury-induced memory loss was also reversed by a single injection at 30 min after injury. Since the protective stress response molecule, HSP70, can be upregulated by Nrf2, we examined protein levels in the hippocampus, and found that HSP70 was elevated by the injury and then further increased by the treatment. To test the possible role of HSP70, model neurons in culture exposed to a mild injury and treated with the Nrf2 activator displayed improved survival that was blocked by the HSP70 inhibitor, VER155008. Following mild traumatic brain injury, there may be a partial protective response and patients could benefit from directed enhancement of regulatory pathways such as Nrf2 for neuroprotection. Published by Elsevier Ltd. on behalf of IBRO.
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- 2012
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16. Modeling the pathobiology of repetitive traumatic brain injury in immortalized neuronal cell lines
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Haris Hatic, John S. Dennis, Jessica N. Saykally, Vedad Delic, Bruce A. Citron, Michael J. Kane, and Carrie L. Butler
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Neurite ,Cell Survival ,Traumatic brain injury ,Cell Count ,Cell Line, Tumor ,Neurites ,medicine ,Humans ,Molecular Biology ,Depression (differential diagnoses) ,Cell Line, Transformed ,Post-Concussion Syndrome ,Mechanism (biology) ,General Neuroscience ,Cell Differentiation ,Cognition ,medicine.disease ,Pathophysiology ,Brain Injuries ,Caspases ,Anxiety ,Neurology (clinical) ,medicine.symptom ,Psychology ,Immortalised cell line ,Neuroscience ,Developmental Biology - Abstract
Repetitive mild traumatic brain injury (mTBI) represents a major public health problem. Many individuals who suffer repetitive mTBIs suffer from Post-Concussion Syndrome, a constellation of neuropsychiatric symptoms that includes depression, anxiety, and problems with memory and other cognitive processes. Significantly, Post-Concussion Syndrome is resistant to existing therapeutic strategies. To provide better treatment options for this patient population, the underlying pathophysiology of repetitive mTBI must be understood. A first step in this process is the establishment of an in vitro model system that recapitulates the biological changes that occur in the brains of repetitively injured humans. The availability of a model with immortalized cell lines would remove the considerable barriers of time, expense, and difficulties with genetic manipulation that exist with the use of primary neuronal cultures. Here we report the development and functional characterization of an in vitro laboratory model of repetitive TBI using immortalized neuronal cell lines. These results indicate that the moderate, repetitive injury reduces viability, numbers and lengths of neurites, and that the neuronal loss mechanism includes caspase activation.
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- 2011
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17. Modulation of transcription factor Nrf2 in an in vitro model of traumatic brain injury
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Michael J. Kane, Bruce A. Citron, Haris Hatic, and Jessica N. Saykally
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Traumatic brain injury ,Cell Survival ,NF-E2-Related Factor 2 ,Blotting, Western ,Electrophoretic Mobility Shift Assay ,Biology ,Antioxidants ,Cell Line ,Thioredoxins ,Downregulation and upregulation ,medicine ,Humans ,HSP70 Heat-Shock Proteins ,Transcription factor ,Regulation of gene expression ,Neurons ,Activator (genetics) ,Reverse Transcriptase Polymerase Chain Reaction ,respiratory system ,medicine.disease ,Immunohistochemistry ,Hsp70 ,Hydroquinones ,Gene Expression Regulation ,Apoptosis ,Brain Injuries ,Cancer research ,Neurology (clinical) ,Thioredoxin ,Neuroscience - Abstract
Traumatic brain injury (TBI) afflicts approximately 1.4 million people in the United States and TBIs have been labeled a major cause of death and disability on a global scale. Regulatory responses in a variety of neuronal loss conditions have supported the protective involvement of the nuclear factor (erythroid-derived 2)-like 2 (Nrf2) transcription factor. Nrf2 regulates antioxidant enzyme genes, and an increase in Nrf2 expression may counteract oxidative damage that results from TBI. Elevated Nrf2 may ultimately act through the upregulation of downstream target genes such as thioredoxin (Trx) and heat-shock protein-70 (HSP70) and this may reduce neuronal loss. We performed multiple mild biaxial stretch injuries to neuroblastoma cells in culture, and examined the effects of the Nrf2 activator, tert-butylhydroquinone (tBHQ). We also compared the stretch injury to oxidative insult. We confirmed that Trx and HSP70 were upregulated by treatment with tBHQ. We observed that tBHQ protected neurons from either insult, and that this was evident by different measures of cell viability and a decrease in annexin V binding. Neuronal health after insult was improved approximately 50% by tBHQ, indicating that neurons exposed to TBI in vitro can be protected.
- Published
- 2011
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