Publications by authors named "Sengul E"

Fewer studies investigate the effects of underlying genetic factors related to semen characteristics, significantly affecting sheep farm profitability. This study aimed to identify single nucleotide polymorphisms (SNP) and genomic regions associated with fresh and frozen-thawed semen traits in rams with low (Hasak) and high (Hasmer) cryotolerance. Semen collected from 11 (5 Hasak with low and 6 Hasmer with high cryotolerance) rams cryopreserved in 0.

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To improve the fertility of cervical artificial insemination (AI) in sheep, we investigated isoxsuprine HCl usage on the cervical passage during cervical AI. We also compared cervical and laparoscopic AI fertility results of using chilled semen at different durations. Semen was collected from rams and diluted as 20 × 10 or 400 × 10 spermatozoa/straw for laparoscopic and cervical AI, respectively, and chilled to 4°C within 2 h.

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Background: Indomethacin is an anti-inflammatory drug that causes ulcers on the gastric mucosa due to its use. Probiotic bacteria are live microorganisms, and it has been stated by various studies that these bacteria have antioxidant and anti-inflammatory effects. In this study, we investigated the possible protective effect of various types of probiotic bacteria (Lactobacillus rhamnosus, Lactobacillus fermentum, and Lactobacillus brevis) against acute gastric mucosal damage caused by indomethacin.

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This study investigated the protective effects of p-coumaric acid (PCA) against bisphenol A (BPA)-induced testicular toxicity in male rats. The rats were divided into control, BPA, BPA+PCA50, BPA+PCA100, and PCA100 groups. Following a 14-day treatment period, various analyses were conducted on epididymal sperm quality and testicular tissues.

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Cadmium (Cd) is a toxic heavy metal with significant environmental health hazards. It enters the body through various routes with tissue accumulation. The relatively longer half-life with slow body clearance significantly results in hepatotoxicity during its liver detoxification.

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  • The study examined how Selenium (Se) affects testis toxicity caused by Acrylamide (ACR) in male rats, using a controlled experimental design with five groups.
  • Results indicated that ACR negatively impacted hormonal levels and sperm quality, while high doses of Se were effective in preventing these adverse effects and reducing oxidative stress and inflammation.
  • Overall, the findings suggest that Selenium plays a protective role against ACR-induced damage to testicular health, mitigating oxidative stress, inflammation, and DNA damage in the testes.
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  • Cadmium (Cd) is toxic to various tissues, causing liver damage through mechanisms like inflammation, oxidative stress, and cell death, with studies showing that Gallic acid (GA), an antioxidant from certain fruits and vegetables, can offer protective effects.
  • In an experiment with 50 male rats, researchers administered differing doses of GA alongside Cd to analyze liver enzymes and markers of oxidative stress and inflammation.
  • Results indicated that GA significantly reduced the harmful effects of Cd, restoring liver function and decreasing various stress and injury markers, highlighting GA's potential as a protective agent against Cd-induced liver damage.
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We herein present a 40-year-old female physician who was diagnosed with idiopathic intracranial hypertension (IIH) 4 years ago. In the last years, the patient was in remission without any medications. Since the onset of COVID-19 pandemic, she has been stressfully working in the high-risk area, therefore using personal protective equipment (N95 mask, protective clothing, goggles, and protective cap) during the day for extended periods.

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Acrylamide (ACR) is used in many fields such as cosmetics, paper, and textile industries. It also occurs at very high temperatures in some foods. Gonadotoxic effects of ACR have been found in experimental animals.

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Glioblastoma multiforme is one of the most aggressive malignant primary brain tumors. To design effective treatment strategies, we need to better understand the behavior of glioma cells while maintaining their genetic and phenotypic stability. Here, we investigated the deformation and migration profile of U87 Glioma cells under the influence of dielectrophoretic forces.

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Background: The aim of this study was to determine the relationship between purified protein derivative of tuberculin (PPD) values, an indicator of BCG protection, and COVID-19 disease in patients with end-stage renal disease (ESRD) on the kidney transplant waiting list.

Methods: Age, sex, dialysis type, ERSD etiologies, and PPD values of patients on the renal transplant waiting list were recorded. SARS-CoV-2 PCR data, whether the patients were previously infected with the virus, and, if infected, the severity of the disease were noted.

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Purpose: Spina bifida (SB) is a congenital disorder caused by the incomplete fusion of the embryonic neural tube during spinal cord development. In this study, we used Spectral Domain Optic Coherence Tomography (SD-OCT) for retinal nerve fibre layer (RNFL) and ganglion cell complex (GCC) analyses and compared the results of healthy children and SB patients in a similar age group.

Methods: Our study was planned prospectively and conducted between June 2017 and July 2019.

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Posterior pedicle screw instrumentation (PPSI) is a well-known method in lumbar spine surgery. Understanding how PPSI affects the biomechanics of the lumbar spine is an important issue. In particular, during PPSI operations, surgeons bend rods according to the patients' spinal curvatures based on their own experiences.

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Glioblastoma multiforme is the most aggressive and invasive brain cancer consisting of genetically and phenotypically altering glial cells. It has massive heterogeneity due to its highly complex and dynamic microenvironment. Here, electrophysiological properties of U87 human glioma cell line were measured based on a dielectrophoresis phenomenon to quantify the population heterogeneity of glioma cells.

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Introduction: Hemodialysis (HD) patients have increased risk for short-term adverse outcomes of COVID-19. However, complications and survival at the post-COVID-19 period have not been published extensively.

Methods: We conducted a national, multicenter observational study that included adult maintenance HD patients recovered from confirmed COVID-19.

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Objective: This study aimed to investigate the rates of influenza and pneumococcal vaccinations and the factors affecting vaccination rates in hemodialysis patients.

Methods: The study included 360 hemodialysis patients. Patients' data were collected via a questionnaire form applied during a face-to-face interview.

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Background: Posterior pedicle screw (PS) fixation, a common treatment method for widespread low-back pain problems, has many uncertain aspects including stress concentration levels, effects on adjacent segments, and relationships with physiological motions. A better understanding of how posterior PS fixation affects the biomechanics of the lumbar spine is needed. For this purpose, a finite element (FE) model of a lumbar spine with posterior PS fixation at the L4-L5 segment level was developed by partially removing facet joints (FJs) to imitate an actual surgical procedure.

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  • Acute kidney injury (AKI) is common in COVID-19 patients, leading to severe outcomes; this study explored factors affecting in-hospital outcomes in patients with both conditions.
  • The study evaluated 578 hospitalized COVID-19 patients with AKI, identifying their characteristics and renal outcomes from 34 hospitals in Turkey, with data collected from March to June 2020.
  • Findings revealed a median patient age of 69, high rates of comorbidities like hypertension and diabetes, and that worse renal outcomes correlated with higher AKI stages; the overall in-hospital mortality rate was 38.9%.
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Microfluidic platforms enabling single-cell measurements notably contribute to the identification and observation of rare cancer cells that are involved in tumor invasion. Most aggressive, invasive, and heterogeneous glioblastoma cells cause incurable primary brain tumors. Infiltrating gliomas of a brain tumor microenvironment have been intensively studied using conventional assays.

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Purpose: To compare functional and anatomic outcome of intravitreal ranibizumab (IVR) and intravitreal aflibercept (IVA) treatments in neovascular age-related macular degeneration by using the treat and extend (TE) protocol.

Methods: In this retrospective chart study, treatment naïve 74 eyes of 74 age-related macular degeneration patients treated with IVR and IVA (38 eyes in IVR and 36 eyes in IVA group) with TE protocol were included. Following three consecutive monthly intravitreal injections, TE protocol was applied to each group.

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  • Older adults with chronic kidney disease (CKD) and those on maintenance haemodialysis (HD) show a higher likelihood of severe COVID-19 outcomes compared to non-uraemic patients.
  • The study analyzed data from 879 hospitalized COVID-19 patients, revealing that older individuals in the CKD and HD groups experienced significantly greater rates of severe illness and ICU admissions than the control group.
  • In-hospital mortality rates were also notably elevated in older patients with CKD and HD, indicating a critical need for targeted healthcare strategies for these vulnerable populations.
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Nephrotoxicity is a very important complication of 5-fluorouracil (5-FU)-treated cancer patients. Increased oxidative stress, kidney damage, and apoptosis play an important role in the pathogenesis of nephrotoxicity caused by 5-FU. In this study, protective effects of two natural compounds, hesperidin and curcumin, on experimentally induced kidney damage in mice with 5-FU were determined.

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  • Hospital-acquired acute kidney injury (HA-AKI) is common in Covid-19 patients, with significantly higher mortality rates observed among chronic kidney disease (CKD) patients compared to those without CKD.
  • In a study of 621 hospitalized Covid-19 patients, 32.5% developed HA-AKI, with rates being 48.0% in CKD patients versus 17.6% in non-CKD patients.
  • The highest mortality rate (41.1%) was found in CKD patients with HA-AKI, indicating that both HA-AKI and CKD worsen outcomes for patients hospitalized due to Covid-19.
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Background: Maintenance hemodialysis (MHD) patients are at increased risk for coronavirus disease 2019 (COVID-19). The aim of this study was to describe clinical, laboratory, and radiologic characteristics and determinants of mortality in a large group of MHD patients hospitalized for COVID-19.

Methods: This multicenter, retrospective, observational study collected data from 47 nephrology clinics in Turkey.

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Background: The patient's position is important for ensuring patient comfort and preventing complications after thyroidectomy.

Objectives: This study was carried out to determine the effects of different degrees of head-of-bed elevation (HOBE) on the respiratory pattern and drainage following thyroidectomy and to provide suggestions for evidence-based clinical practice.

Methods: The sample of this prospective, parallel arm, randomized controlled trial included 114 patients undergoing thyroidectomy in a university hospital in Turkey.

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