176 results match your criteria: "Istanbul University Istanbul Medical Faculty[Affiliation]"

Are mesenchymal stem cells still effective in acute GvHD management?

Transfus Apher Sci

December 2024

University of Health Sciences, Ankara Oncology Training and Research Hospital, Department of Hematology & Apheresis Unit, Ankara, Turkey; Ankara Yildirim Beyazit University, School of Medicine, Department of Internal Medicine, Division of Hematology, Ankara, Turkey.

Objective: Graft-versus-host disease (GvHD) is a common and serious complication following allogeneic hematopoietic stem cell transplantation (allo-HSCT), significantly impacting transplant efficacy. In the treatment of GvHD, numerous therapeutic approaches have been explored, with mesenchymal stem cells (MSCs) emerging as a prominent immunomodulatory option. We aimed to evaluate efficacy and outcomes of using MSCs for steroid refractory acute GVHD (SR-aGvHD) management.

View Article and Find Full Text PDF

Efficacy of Ruxolitinib in the management of chronic GVHD.

Transfus Apher Sci

December 2024

University of Health Sciences, Ankara Oncology Training and Research Hospital, Department of Hematology & Apheresis Unit, Ankara, Turkey; Ankara Yildirim Beyazit University, School of Medicine, Department of Internal Medicine, Division of Hematology, Ankara, Turkey.

Objectives: Allogeneic hematopoietic stem cell transplantation (allo-HSCT) is a potentially curative treatment for hematological diseases, with success rates improving due to advancements in conditioning regimens and new anti-graft versus host disease (GVHD) drugs. Ruxolitinib, an oral selective Janus kinase (JAK) 1 and 2 inhibitor has been used to mitigate the effects of various inflammatory and myeloproliferative syndromes, given the JAK kinase pathway's central role in cytokine signaling during inflammatory and immune processes. In this study we aimed to assess ruxolitinib's efficacy in patients with chronic GVHD (cGVHD).

View Article and Find Full Text PDF

What should be the optimal dose of post-transplantation cyclophosphamide for GVHD prophylaxis in allogeneic stem cell transplantation?

Transfus Apher Sci

December 2024

University of Health Sciences, Ankara Oncology Training and Research Hospital, Department of Hematology & Apheresis Unit, Ankara, Turkey; Ankara Yildirim Beyazit University, School of Medicine, Department of Internal Medicine, Division of Hematology, Ankara, Turkey.

Objectives: In this study, we aimed to compare the engraftment days, graft versus host disease (GVHD) development, relapse and overall survival (OS) rates in patients using variable intensity conditioning regimens with two different post-transplant cyclophosphamide (PTCy) doses for hematological malignancies.

Material And Methods: We retrospectively analyzed 162 patients who have had PTCy at a dose of 25 mg/kg × 2 and 50 mg/kg × 2 between 2018 and 2024. Patients were divided in 2 groups; PTCy dose with 25 mg/kg × 2 (Group 1, n = 45) and PTCy dose with 50 mg/kg × 2 (Group 2, n = 117).

View Article and Find Full Text PDF

Objective: Glutamate transporters play a key role in central nervous system physiology by maintaining excitatory neurotransmitter homeostasis. Biological assemblies of the transporters, consisting of cyclic homotrimers, emerge as a crucial aspect of glutamate transporter modulation. Hence targeting heteromerization promises an effective approach for modulator design.

View Article and Find Full Text PDF

Common viral respiratory infections in children with cancer during the COVID-19 pandemic: a multicenter study from Türkiye.

Turk J Pediatr

October 2024

Department of Pediatric Hematology Oncology, Yıldırım Beyazıt University Faculty of Medicine, Ankara Bilkent City Hospital, Ankara, Türkiye.

Article Synopsis
  • During the COVID-19 pandemic lockdown, the study assessed respiratory viral infections in children with cancer, highlighting their clinical impact.
  • Of the 265 episodes evaluated, human rhinovirus/enterovirus was the most common pathogen identified, with significant complications noted, including a higher rate of lower respiratory tract infections.
  • The findings emphasize the necessity for quicker detection and treatment of respiratory viruses to prevent severe outcomes in this vulnerable population.
View Article and Find Full Text PDF

Objective: Glutamate transporters play a crucial role in neurotransmitter homeostasis, but studying their structure and function is challenging due to their membrane-bound nature. This study aims to investigate whether water-soluble QTY-variants of glutamate transporters EAA1, EAA2 and EAA3 retain the conformational characteristics and dynamics of native membrane-bound transporters.

Methods: Molecular dynamics simulations and comparative genomics were used to analyze the structural dynamics of both native transporters and their QTY-variants.

View Article and Find Full Text PDF

Hyperfunctional ectopic parathyroid glands in the mediastinum pose a challenge to diagnosis and require optimal surgical management. Video-assisted thoracoscopic surgery (VATS) has emerged as a promising minimally invasive approach, offering potential benefits in terms of both patient comfort and oncological principles. This study aimed to evaluate the effectiveness and safety of VATS for the treatment of hyperfunctional ectopic parathyroid glands in the mediastinum.

View Article and Find Full Text PDF

Glutamate transporters play key roles in nervous physiology by modulating excitatory neurotransmitter levels, when malfunctioning, involving in a wide range of neurological and physiological disorders. However, integral transmembrane proteins including the glutamate transporters remain notoriously difficult to study, due to their localization within the cell membrane. Here we present the structural bioinformatics studies of glutamate transporters and their water-soluble variants generated through QTY-code, a protein design strategy based on systematic amino acid substitutions.

View Article and Find Full Text PDF
Article Synopsis
  • Monoamine transporters are special proteins that help send messages in the brain, and they are important for understanding certain brain and body problems.
  • Scientists are studying these proteins, but it's hard because they are located in cell membranes.
  • By changing some parts of these proteins, researchers found new versions that could help in developing medicines and understanding how these proteins work in health and disease.
View Article and Find Full Text PDF

Background And Aims: Alagille syndrome (ALGS) is characterized by chronic cholestasis with associated pruritus and extrahepatic anomalies. Maralixibat, an ileal bile acid transporter inhibitor, is an approved pharmacologic therapy for cholestatic pruritus in ALGS. Since long-term placebo-controlled studies are not feasible or ethical in children with rare diseases, a novel approach was taken comparing 6-year outcomes from maralixibat trials with an aligned and harmonized natural history cohort from the G lobal AL agille A lliance (GALA) study.

View Article and Find Full Text PDF

Background: Postoperative delirium is a common complication in patients after cardiac surgery, especially in older patients, and can manifest as a disturbance of attention and consciousness. It can lead to increased postoperative morbidity, prolonged need for care, and mortality. The presented study investigates whether the occurrence of postoperative delirium after cardiac surgery can be prevented by a multisensory stimulation.

View Article and Find Full Text PDF

Investigation of the Relationship Between Laparoscopic Sleeve Gastrectomy and Gastroesophageal Reflux Disease Using 24-hour Multichannel Intraluminal Impedance With pH Testing According to Current Consensus.

Surg Laparosc Endosc Percutan Tech

February 2024

Istanbul University Istanbul Medical Faculty/Gastroenterohepatology Department, İstanbul University, İstanbul Medical School, Turgut Özal Millet Street, Fatih/İstanbul.

Article Synopsis
  • Laparoscopic sleeve gastrectomy (LSG) is a common weight loss surgery that may affect gastroesophageal reflux disease (GERD), but research using objective tests like multichannel intraluminal impedance combined with pH testing (MII-pH) is limited.
  • A study involving 33 patients undergoing LSG found significant increases in acid reflux and pathologic reflux after the procedure, indicating a potential worsening of GERD symptoms post-surgery.
  • The study suggests that preoperative and postoperative evaluations using endoscopy and MII-pH testing are important for monitoring GERD, highlighting the need for closer follow-up after LSG.
View Article and Find Full Text PDF

Dysphagia is common in idiopathic Parkinson's disease (IPD) and is associated with impairments in both swallowing safety and swallowing efficiency. The goals of this study were to define post-swallow residue patterns in people with IPD and describe pathophysiological endoscopic findings affecting residue accumulation. This was a prospective single-blinded cross-sectional cohort study of patients with the diagnosis of IPD recruited from a Movement Disorder Clinic.

View Article and Find Full Text PDF

Objective: The impact of allele burden on clinical course in Philadelphia-negative (Ph-negative) myeloproliferative neoplasms (MPNs) is not clear. We analyzed the clinical impact of allele burden in a relatively large series of patients with Ph-negative MPNs and long-term follow-up.

Materials And Methods: A total of 228 patients with Ph-negative MPNs, including 118 with essential thrombocythemia (ET), 84 with primary myelofibrosis (PMF), and 26 with polycythemia vera (PV), were analyzed.

View Article and Find Full Text PDF

No data exist for the association between the presence of accessory spleen after splenectomy and response to rituximab in immune thrombocytopenia (ITP). We investigated the relationship between accessory spleen presence and rituximab response in splenectomized ITP patients. Fifteen chronic refractory ITP patients were included.

View Article and Find Full Text PDF

Phenotypic Variability in Siblings With Autosomal Recessive Polycystic Kidney Disease.

Kidney Int Rep

July 2022

Department of Pediatrics, University Hospital Cologne and Faculty of Medicine, University of Cologne, Cologne, Germany.

Introduction: Autosomal recessive polycystic kidney disease (ARPKD) is a rare monogenic disorder characterized by early onset fibrocystic hepatorenal changes. Previous reports have documented pronounced phenotypic variability even among siblings in terms of patient survival. The underlying causes for this clinical variability are incompletely understood.

View Article and Find Full Text PDF

Background: In this case report, we present two chronic hemodialysis patients with upper extremity swelling due to central venous occlusions together with their clinical presentation, surgical management and brief review of the literature.

Methods: The first patient who was a 63-year-old female patient with a history of multiple bilateral arteriovenous fistulas (AVFs) was referred to our clinic. Physical examination demonstrated a functioning right brachio-cephalic AVF, with severe edema of the right arm, dilated venous collaterals, facial edema, and unilateral breast enlargement.

View Article and Find Full Text PDF

Purpose: This study aims to evaluate the potential of machine learning algorithms built with radiomics features from computed tomography urography (CTU) images that classify RB1 gene mutation status in bladder cancer.

Method: The study enrolled CTU images of 18 patients with and 54 without RB1 mutation from a public database. Image and data preprocessing were performed after data augmentation.

View Article and Find Full Text PDF

We evaluated the demographic features, etiologic risk factors, treatment strategies, and outcome of the infants and children with urolithiasis (UL). A retrospective multicenter study was conducted including 23 Pediatric Nephrology centers in Turkey. The medical records of 2513 children with UL were reviewed.

View Article and Find Full Text PDF

Aim: We present our subclavian artery revascularization experiences in the patients with thoracic aortic aneurysm who underwent hybrid repair.

Materail And Methods: Between May 2015-December 2018,4 patients underwent TEVAR procedure following axilloaxillary bypass grafting.The mean age of the patients was 72.

View Article and Find Full Text PDF

Aim: To evaluate the prognostic role of the systemic immune-inflammation index (SII) in patients with operable gastric cancer.

Methods: We assessed 354 patients with operable gastric cancer from tertiary centers in Turkey. SII was calculated by following formula: [neutrophil (cells × 10/L) × platelet (cells × 10/L)]/lymphocyte (cells × 10/L).

View Article and Find Full Text PDF

Purpose: Scapular morphology is an extrinsic factor playing role in rotator cuff tear (RCT) etiology. The objective of this study was to evaluate the relationship between critical shoulder angle (CSA) and acromion index (AI) with partial-bursal side and full thickness RCT and the size of the RCT.

Hypothesis: The hypothesis was that CSA and AI would be greater in partial bursal-side RCT and full-thickness RCT patients and would increase with the size of the RCT.

View Article and Find Full Text PDF

IgG4 producing POEMS syndrome: A rarely recognized subtype.

Indian J Pathol Microbiol

November 2021

University of Health Sciences Bakırkoy Dr. Sadi Konuk Training and Research Hospital, Pathology Clinic, Istanbul, Turkey.

Serum IgG4 is typically measured for Immunoglobulin G4-related Disease (IgG4-RD), a fibroinflammatory condition associated with polyclonal increase in serum IgG4. Yet, increased IgG4 may still be monoclonal, and little is known about IgG4 POEMS syndrome. We present a case of 40-year-old male with a mass lesion in the left sacral ala.

View Article and Find Full Text PDF

Objective This study aims to determine the factors that prolong cecal intubation time (CIT) and determine the effect of obesity on CIT measured using multiple indexes. Methods Patients who underwent elective colonoscopy between July 10, 2020, and January 20, 2021, were evaluated in this prospective observational study. Age, gender, constipation, bowel preparation, presence of diverticulosis, previous surgery history, auxiliary maneuver and additional analgesic requirement, cecum intubation length (CL) and obesity indices [body mass index (BMI), waist circumference (WC), waist-to-height ratio (WHtR)] were analyzed.

View Article and Find Full Text PDF