Tufan Tukek's research while affiliated with Istanbul Medical University and other places

Publications (75)

Article
The suppressor of the cytokine signaling-1 (SOCS1) gene is a short sequence located on chromosome 16 that functions to induce an appropriate immune response and is an essential physiological regulator of interferon (IFN) signaling. In addition to comparing the global DNA and SOCS1 gene promoter methylation status between our patients with coronavir...
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Objective: Vitamin D has beneficial effects, some of which involve the cardiovascular system. No study to date has investigated the association between serum endocan levels, as a biomarker of endothelial inflammation, and vitamin D levels in the absence of subclinical atherosclerosis detected by carotid intima-media thickness (CIMT) in healthy ind...
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Purpose While the definitive diagnosis of COVID-19 relies on PCR confirmation of the virus, the sensitivity of this technique is limited. The clinicians had to go on with the clinical diagnosis of COVID-19 in selected cases. We aimed to compare PCR-positive and PCR-negative patients diagnosed as COVID-19 with a specific focus on older adults. Meth...
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Background The coronavirus disease 2019 (COVID-19) has had a great impact on patients’ physical problems as well as psychological status. However, there is limited data about the impact of psychological problems on cardiac function during the COVID-19 pandemic. In this study, we aimed to investigate the relationship between mental health disorders...
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Background While there are substantial reports on the acute phase of Covid-19, the data on post-Covid phase are limited. Aim To report the data on older post-Covid patients comparatively with the young adults. Study design Retrospective, single-center study in post-Covid outpatient clinic. Clinical characteristics, laboratory examination, chest i...
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Background: Patients with prediabetes have an increased risk of atherosclerotic cardiovascular disease; therefore, early detection is important. Objective: The present study aimed to reveal the usability of serum endocan levels as a biomarker in the diagnosis of subclinical atherosclerosis in patients with prediabetes, based on CIMT measurements. M...
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Background: The purpose of this study is to evaluate the prognostic roles of hemostatic tests including prothrombin time (PT), activated partial thromboplastin time (aPTT), fibrinogen, D-dimer, and antithrombin III in the progression of disease, monitorization of severe, mild and moderate cases, and also to show their relationship with inflammator...
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Background Acute kidney injury (AKI) in COVID-19 patients is associated with poor prognosis. However, the incidence, risk factors and potential outcomes of AKI in hospitalized patients are not well studied.Materials and methods This is a retrospective cohort study conducted in two major university hospitals. Electronic health records of the patient...
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Objective: Severe acute respiratory syndrome (SARS) coronavirus 2 (SaRS-Cov-2) associated respiratory disease (COVID-19), announced as a pandemic, is a multisystem syndrome. SARS-CoV-2 directly infects and damages vascular endothelial cells, which leads to microvascular dysfunction and promotes a procoagulant state. Dipyridamole (DP) acts as a rev...
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Mannose-binding lectin 2 (MBL2) is a serine protease which is believed to be an important factor in the inherited immune system. In this article, we present a coronavirus disease 2019 (COVID-19) family of five patients: a 56-year-old father, a 51-year-old mother, two sons aged 23 and 21 years, and a 15-year-old daughter. According to the results of...
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Objective Patients with cancer are considered highly vulnerable to the COVID-19 disease. However, there are still few data in hematologic patients. Some small studies have shown a high mortality on patients with hematologic malignancies and COVID-19. In this study we aim to report a single center experience of the hematologic patient population wit...
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In COVID-19-induced acute respiratory distress syndrome, the lungs are incapable of filling with sufficient air, leading to hypoxemia that results in high mortality among hospitalized patients. In clinical trials, low-molecular-weight heparin was administered via a specially designed soft-mist inhaler device in an investigator initiated, single-cen...
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For COVID-19 (Coronavirus Disease-2019) cases, detecting host-based factors that predispose to infection is a very important research area. In this study, the aim is to investigate the MBL2 and NOS3 gene polymorphisms in COVID-19 patients with lung involvement, whose first nasopharyngeal PCR results were negative. Seventy-nine patients diagnosed wi...
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Objective Corona Virus Disease-2019 (COVID-19) has been among the major infectious events of the century. In today’s literature where COVID-19 and host factor effects are frequently examined, we aimed to examine another factor: Circadian Clock Protein PERIOD 3 (PER3). There is a significant correlation between PER3 gene polymorphism and circadian r...
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Background: The novel coronavirus infection (COVID-19) disease has spread rapidly and posed a great threat to global public health. The laboratory parameters and clinical outcomes of the disease in discharged patients remain unknown. In this study, we aimed to investigate the laboratory and echocardiographic findings of patients with COVID-19 afte...
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Myocardial injury caused by COVID-19 was reported in hospitalized patients previously. But the information about cardiac consequences of COVID-19 after recovery is limited. The aim of the study was comprehensive echocardiography assessment of right ventricular (RV) in patients recovered from COVID-19. This is a prospective, single-center study. Aft...
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Insulin degludec/insulin aspart (IDegAsp) is a fixed-ratio co-formulation of insulin degludec (IDeg), which provides long-lasting basal insulin coverage, and insulin aspart (IAsp), which targets post-prandial glucose. This expert panel aimed to provide a practical and implementable guidance document to assist clinicians in prescribing IDegAsp in th...
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Introduction: Coronavirus has caused a pandemic since it was first detected in Wuhan in December 2019. The mortality rate is high in moderate and severe cases. Our study aimed to screen the CBC parameters as a useful predictive factor for COVID-19 resulting in critical illness. Methods: A total of 285 patients with positive PCR results were analyze...
Preprint
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Background The novel coronavirus infection (COVID-19) disease has spread rapidly and posed a great threat to global public health. The laboratory parameters and clinical outcomes of the disease in discharged patients remain unknown. In this study, we aimed to investigate the laboratory and echocardiographic findings of patients with COVID-19 after...
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Myocardial tissue is sensitive to insulin resistance (IR) due to its interactions with insulin levels. Previous studies demonstrated that heart failure prevalence was higher in IR patients. Evaluation of myocardial deformation by multilayer global longitudinal strain (MGLS) might provide more information about IR related left ventricular dysfunctio...
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Background Endotrophin is one of the extracellular matrix proteins secreted by adipose tissue. In this study, we aimed to investigate the effects of changes in blood glucose levels on serum endotrophin levels secreted by adipose tissue and thus on diabetes. Methods In this prospective pilot study included 78 patients with type 2 diabete (T2D) with...
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Background The information on electrocardiographic features of patients with coronavirus disease 2019 (COVID-19) is limited. Our aim was to determine if baseline electrocardiographic features of hospitalized COVID-19 patients are associated with markers of myocardial injury and clinical outcomes. Methods In this retrospective, single center cohort...
Preprint
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Background: Endotrophin is one of the extracellular matrix proteins secreted by adipose tissue. In this study, we aimed to investigate the effects of changes in blood glucose levels on serum endotropin levels secreted by adipose tissue and thus on diabetes. Methods: In this prospective pilot study included 78 patients with type 2 diabete(T2D) with...
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Objectives: To evaluate the effect of adjunct treatment with Octagam, an intravenous immunoglobulin (IVIG) product, on clinical outcomes and biomarkers in critically ill COVID-19 patients. Methods: Data from a single center was analyzed retrospectively. Patients had received preliminary standard of intensive care (SIC) according to a local treatmen...
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Aim: The purpose of this article was to report the low rates of intensive care unit admission and mortality in intermediate- and high-risk COVID-19 patients, and to share our clinical approach with other colleagues. In addition, we sought to reveal the relationship between myocardial injury and clinical outcomes such as death, intensive care unit...
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Objective Older adults have been continuously reported to be at higher risk for adverse outcomes of Covid-19. We aimed to describe clinical characteristics and early outcomes of the older Covid-19 patients hospitalized in our center comparatively with the younger patients, and also to analyze the triage factors that were related to the in-hospital...
Article
Thrombotic and embolic complications in the cardiovascular system are evident and associated with worse prognosis in coronavirus disease 2019 (COVID-19) patients. Endothelial-specific molecule 1 (endocan) plays a role in vascular pathology. We hypothesized serum endocan levels on admission are associated with primary composite end point (mortality...
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Introduction: COVID-19 caused by the SARS-CoV-2 continues to spread rapidly across the world. In our study, we aim to investigate the relationship between the liver enzymes on admission (AST, ALT, ALP, GGT) and severity of COVID-19. We evaluated course of disease, hospital stay, liver damage and mortality. Materials and methods: Our study includ...
Preprint
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Background: There is some evidence from case reports and a few studies in China that critically ill COVID-19 patients may benefit from treatment with intravenous immunoglobulins (IVIG). We compared clinical outcomes and biomarkers in a Turkish cohort of patients with severe COVID-19 who were treated with the institution's standard of care (SOC), ei...
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Objective Older adults have been continuously reported to be at higher risk for adverse outcomes of Covid-19. We aimed to describe clinical characteristics and early outcomes of the older Covid-19 patients hospitalized in our center comparatively with the younger patients, and also to analyze the triage factors that were related to the in-hospital...
Preprint
Full-text available
Objective: Older adults have been continuously reported to be at higher risk for adverse outcomes of Covid-19. We aimed to describe clinical characteristics and early outcomes of the older Covid-19 patients hospitalized in our center comparatively with the younger patients, and also to analyze the triage factors that were related to the in-hospital...
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PurposeTo improve prescribing in older adults, criterion sets have been introduced from different countries. While current criterion sets are useful to some extent, they do not meet the need in some European countries. Turkish inappropriate medication use in the elderly (TIME) criteria was planned to meet this need.Methods In phase 1, the user frie...
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Introduction: Cardiorenal syndrome (CRS) is defined as acute or chronic dysfunction in the heart and kidney due to important interactions between the heart and kidney disease. The aim of this study was to evaluate prediction of CRS type 1 by measuring kidney injury molecule-1 (KIM-1) and to establish early diagnosis of acute kidney injury (AKI)....
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BACKGROUND: To our knowledge, the early effect of the fear caused by terrorism on human health, especially its effect on the number of visits to medical emergency departments (EDs), has not yet been studied. OBJECTIVES: To observe the effect of fear from terrorist alerts on the use of EDs and on the rate of cardiovascular (CV) and/or cerebrovascul...
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Objective: Type 1 cardiorenal syndrome (CRS) is an acute renal failure in patients with acute decompensated heart failure with an incidence of 24% to 45%. The aim of our study was to investigate the significance of new renal biomarkers to predict type 1 CRS. Patients and methods: The study included 111 patients with acute decompensated heart fai...
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Aim: Liver cirrhosis isa process characterized by fibrosis and normal liver structure is replaced with diffuse nodular structure. Different laboratory values are used for diagnosis and prognosis of liver cirrhosis. To determine platelet and mean platelet volume levels of patients with liver cirrhosis and to find out if platelet or mean platelet vol...
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Purpose: Cisplatin is a chemotherapeutic agent with potential nephrotoxicity. Delayed increase in serum creatinine after cisplatin administration shows that serum creatinine may not be a sufficient marker for early detection of nephrotoxicity. Urinary insulin-like growth factor binding protein-7 (IGFBP7) and tissue inhibitor of metalloproteinases-...
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Objective: Vitamin D is a key regulator of calcium homeostasis and has anti-inflammatory and immunomodulatory effects. Active vitamin D has a direct effect on T cells and antigen-presenting cells. It also suppresses the differentiation of B cells to plasma cells and inhibits immunoglobulin production. Vitamin D supplementation is associated with a...
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Objectives: Omentin-1, an adipocytokine that increases the insulin sensitivity, has been determined to be reduced in patients with insulin resistance, impaired glucose tolerance, and Type-2 diabetes mellitus. In this study, we have investigated the alterations in Omentin-1 levels with the blood glucose regulation in diabetic patients having poor gl...
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Objectives: We aimed to determine the prevalence of chronic diseases and unhealthy lifestyle behaviors of Turkish doctors as compared with the general population and the frequency of compliance with preventive clinical practices among doctors. Methods: This was an observational, prospective cohort study that enrolled graduates between 1975 and 2...
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Type 2 diabetes is a chronic progressive disease. In diabetes, where multiple systems are involved, iron metabolism is also affected. Nevertheless, it is unknown how blood glucose regulation and iron metabolism are effected and whether there are changes in hematologic parameters. The aim of our study was to investigate whether blood glucose regulat...
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Objective: To investigate the level of endothelial cell specific molecule-1 (endocan) in obstructive sleep apnea (OSA). Methods: Study group included subjects with OSA. Control group included subjects who had no OSA on polysomnography and nonobese healthy subjects from population who had no OSA symptoms. Endocan levels of OSA and non-OSA subject...
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Endothelial-specific molecule 1 (endocan) is expressed by endothelial cells and may have a major role in the regulation of cell adhesion and in the pathogenesis of inflammatory disorders. We aimed to assess change in endocan levels after 3 months of lifestyle change recommendations and guideline-based treatment. Diabetic patients (n = 77) who had n...
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Orlistat is a pancreatic lipase inhibitor which is used to treat obesity. Due to the increasing prevalence of obesity, orlistat use is thought to rise progressively. We report an interesting case caused by orlistat use caught in the early stages of acute pancreatitis through imaging; in addition, the case had significantly elevated serum amylase le...
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Endothelial-specific molecule 1 (endocan) is expressed in endothelial cells. We investigated the relationship between acute coronary syndrome (ACS) and serum endocan levels. We included 30 individuals as a control group and 53 patients diagnosed with ACS. The severity of coronary artery disease was assessed by a modified Gensini stenosis and SYNTAX...
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Hantaviruses are enveloped RNA viruses from the Bunyaviridae family. These pathogens are associated with two different and severe illnesses; hemorrhagic fever with renal syndrome and hantavirus cardiopulmonary syndrome. Although frequently reported in Europe, until now only 12 cases from the western Black Sea region, 2 from Giresun, 1 from Istanbul...
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The prevalence of restless legs syndrome (RLS) is increased in gluten sensitive enteropathy (GSE); but prevalence of GSE is not known in RLS. 96 RLS patients and 97 healthy controls, both with or without iron deficiency were enrolled. All secondary RLS patients except iron deficiency were excluded. Subjects underwent a thorough biochemistry and rou...
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Urotensin II is a potent vasoactive peptide that has been implicated in the pathophysiology of many diseases. There is no study reporting the role and level of this peptide in recipients of kidney transplant. So we aimed to study the plasma levels of urotensin II in this group of patients. Plasma urotensin II levels were analyzed in 110 subjects, w...
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In acute heart failure (AHF), hemoglobin, red cell distribution width, mean platelet volume, leukocytes, and relative lymphocyte count have been associated with mortality. It is not known whether absolute blood neutrophil, eosinophil, and monocyte counts are mortality predictors. One hundred and seventy-six patients hospitalized due to AHF were enr...
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Oxidative stress has been implicated in over 100 disorders in recent years; however, the situation in restless legs syndrome (RLS) has not been studied yet. Fifty patients with RLS not medicated for RLS and 50 sex- and age-matched, healthy controls and controls with no pathology except mild iron deficiency or iron deficiency anaemia were enrolled....
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A 43-year old male patient with hyponatremic hypertensive syndrome was diagnosed as catastrophic primary antiphospholipid syndrome (PAPS). He subsequently developed hepatosplenomegaly. The patient also carried thrombophilia- and haemochromatosis-associated gene mutations. Further investigations upon persistence of splenomegaly indicated development...
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Wilson’s disease is an autosomal-recessive disorder caused by mutation in the ATP7B gene. Absent or reduced function of ATP7B protein leads to decreased hepatocellular excretion of copper into bile. Subsequent copper accumulation, first in the liver but ultimately in the brain and other tissues, produces different clinical manifestations such as he...
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To demonstrate the presence of splenomegaly in primary antiphospholipid syndrome (PAPS) patients without accompanying portal hypertension or comorbidity. Twelve patients (7 women) aged 23-65 years followed upon the diagnosis of PAPS were enrolled in the study. We documented the identified causes of splenomegaly in patients with PAPS, and searched f...
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Aims: To investigate the prevalence of low T3 in patients with acute coronary syndrome (ACS). Methods: A total of 135 (44 female, 91 male) patients with the diagnosis of ACS hospitalized in coronary care unit were enrolled in the study. Results: The prevalence of low TT3 in ACS was 36%. The probability of acute complications in patients with low TT...
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Our case involves a 53 year old woman. Three years ago, she was investigated because of normal hemoglobin levels despite very a low erythrocyte count, which was revealed during the preoperative evaluation for ovarian cyst operation. The Direct Coombs test was found to be positive against complement and negative against IgG. Cold agglutinin titer wa...