Publications by authors named "Oguzhan Yarali"

This study investigates the genetic causes of epilepsy in 166 paediatric patients under the age of 16 from the East Anatolian region of Turkey, who were treated at Erzurum City Hospital between 2018 and 2023. Patients with early-onset seizures, a family history of epilepsy or intellectual disability was selected for genetic analysis using a next-generation sequencing (NGS) gene panel targeting 449 genes associated with epilepsy and epileptic encephalopathy. The analysis revealed that pathogenic or probable pathogenic mutations were present in 14.

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ABTRACTThis study retrospectively reviews individuals diagnosed with biotinidase deficiency in Eastern Anatolia to analyze the genetic variants and their relationship with biotinidase activity levels. The research focuses on determining the percentage impact of different variants on enzyme activity. The study included 357 patients who presented to Erzurum City Hospital with symptoms of biotinidase deficiency between 2018 and 2023 and were referred to the medical genetics department.

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Article Synopsis
  • The study focused on congenital hypothyroidism (CH) and aimed to analyze the clinical and genetic factors associated with it, specifically targeting genetic variants linked to thyroid tissue formation and hormone secretion.
  • A total of 61 Turkish patients from 45 families participated, with a variant detection rate of 37.7%; the most common mutations were found in the TPO gene, followed by TSHR, DUOX2, TG, and NKX2-1 genes.
  • The research identified rare new gene variations related to CH, suggesting that the current guidelines for genetic analysis are effective, and highlighting the potential prevalence of TSHR mutations in thyroid dysgenesis cases.
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Article Synopsis
  • Carbamoyl phosphate synthetase 1 (CPS-1) deficiency is a rare urea cycle disorder affecting approximately 1 in 150,000-200,000 newborns, often causing severe hyperammonemia shortly after protein intake, leading to high mortality rates in early-onset cases.
  • A case study of a newborn male with elevated ammonia levels due to CPS-1 deficiency shows he received urgent treatments, including dextrose infusion, ammonia-scavenging therapy, peritoneal dialysis, and ultimately, a liver transplant from his father at six months of age.
  • The study highlights the potential benefits of liver transplantation in CPS-1 deficiency cases and suggests that carglumic acid could improve long-term
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Introduction Acute rheumatic fever (ARF) is a non-suppurative systemic inflammatory disease that manifests 1-5 weeks following a Group A beta-hemolytic streptococcal infection. On the other hand, familial Mediterranean fever (FMF) is a hereditary autoinflammatory disease characterized as an autosomal recessive disease, with affected individuals having pathogenic mutations in the Mediterranean fever gene  gene located on the short arm of chromosome 16. FMF and ARF have overlapping symptoms and signs, and both disorders are common in Turkey.

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Introduction: The α subunit of voltage-gated sodium channels in mammals is encoded by 9 different genes, and variations in the , , , and genes highly expressed in the CNS have been associated with epilepsy phenotypes. This study aimed at investigating the frequency of gene variations in Dravet syndrome (DS) and GEFS+ spectrum phenotype cases and discussing the molecular results in the context of genotype-phenotype correlation.

Methods: Fifteen patients diagnosed with DS and 54 patients meeting the GEFS+ spectrum criteria were included in this study.

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Charcot-Marie-Tooth (CMT) disease represents a distinct subgroup of inherited peripheral neuropathies with a significant prevalence throughout the world and manifests both phenotypic and genetic heterogeneity. Electrophysiological studies subclassify CMT mainly as demyelinating or axonal types. In this study, we investigated the molecular characteristics of a Turkish cohort of 23 probands out of 34 symptomatic demyelinating CMT individuals from January 2019 to December 2021.

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Objectives: Hypogonadism is defined as inadequate sex hormone production due to defects in the hypothalamic-pituitary-gonadal axis. In recent years, rare single gene defects have been identified in both hypergonadotropic hypogonadism (Hh), and hypogonadotropic hypogonadism (HH) cases with no chromosomal anomalies. The aim of the present study is to investigate the underlying molecular genetic etiology and the genotype-phenotype relationship of a series of patients with Hh and HH.

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Monogenic hypercholesterolemia with Mendelian inheritance is a heterogeneous group of diseases that are characterized by elevated plasma low-density lipoprotein cholesterol (LDL-C) levels, and the most common form of this disorder is autosomal-dominant familial hypercholesterolemia (FH). A total of 104 index cases with the clinical diagnosis of FH were included in this study. Low-density lipoprotein receptor () was sequenced using the Sanger sequencing method.

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Context: Steroid 17α-hydroxylase/17,20-lyase deficiency (17OHD) is characterized by decreased sex steroids and cortisol, and excessive mineralocorticoid action. The clinical symptoms of hypocortisolemia are subtle.

Aim: The clinical, biochemical, and molecular characteristics of patients with 17OHD were evaluated to determine the factors influencing the time of diagnosis and the management.

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Background Woodhouse-Sakati syndrome (WSS) (OMIM#241080) is an extremely rare multisystemic disease. Alopecia, hypogonadism, loss of hearing, hypothyroidism, diabetes mellitus (DM) and neurological disorders are the components of this syndrome. The syndrome is caused by homozygous or compound heterozygous mutations in DCAF17, and has recently been implicated in the development of both male and female gonads, thus resulting in hypogonadism.

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Objective: The systemic form of pseudohypoaldosteronism type 1 (PHA1) is an autosomal recessive disorder characterized by defective sodium transport in multi-organ systems. Mutations in the genes encoding the amiloride-sensitive epithelial sodium channel, ENaC, account for genetic causes of systemic PHA1. We describe systemic PHA1 due to 4 novel variants detected in SCNN1A and SCNN1B in 3 cases from 3 unrelated consanguineous families.

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Objective:: To investigate the effect of HRE (Hippophae rhamnoides extract) on oral mucositis induced in rats with MTX.

Material And Methods:: Experimental animals were divided into groups as healthy (HG), HRE+MTX (HMTX), and control group, which received MTX (MTXC). HMTX group received 50 mg/kg HRE while MTXC and HG groups received equivolume distilled water with gavage once a day.

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Aim: To compare the effects of thiamine pyrophosphate (TPP) and thiamine (TM) in oxidative optic neuropathy in rats induced by ethambutol.

Methods: The animals were divided into four groups: a control group (CG), an ethambutol control (ETC) group, TM plus ethambutol group (TMG), and TPP plus ethambutol group (TPPG). One hour after intraperitoneal administration of TM 20 mg/kg to the TMG group and TPP 20 mg/kg to TPPG group, 30 mg/kg ethambutol was given gavage to all the groups but the CG.

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Objectives: The objective of this study is to investigate and evaluate the effect of extract (HRE) on oropharyngeal mucositis induced in rats with methotrexate (MTX) through biochemical, gene expression, and histopathological examinations.

Methods: Experimental animals were divided into a healthy group (HG), a HRE+MTX (HREM) group, HRE group (HREG), and a control group that received MTX (MTXG). The HREM and HREG groups of rats was administered 50 mg/kg HRE, while the MTXG and HG groups were given an equal volume distilled water with gavage.

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Objective: To investigate the possible protective effects of Vitamin E (Vit E) on oxidative stress and jejunal damage in the rat intestinal mucosa after methotrexate (MTX)-induced enterotoxicity.

Study Design: Rats were divided into 3 groups: control, MTX, and MTX+ Vit E; each group contained 8 animals. The control group was given physiological serum in addition to sunflower oil for 3 days.

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Objective: The aim of this study was to investigate the role of quercetin on cadmium-induced oxidative stress, testicular damage, and apoptosis in rat testes.

Study Design: The rats were randomly allotted into 1 of 3 experimental groups: control, cadmium-treated, and cadmium-treated with quercetin; each group con- tained 10 animals. Control animals received daily injec- tions of the saline vehicle alone.

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Objectives: In this study, we investigated the effect of metamizole on ischemia/reperfusion (I/R) injury an analysis of biochemistry, molecular gene expression, and histopathology in the rat ovary of female albino Wistar rats.

Materials And Methods: Animals were divided into four groups; control group with induced ischemia-reperfusion (IRC), ischemia-reperfusion +100 mg/kg metamizole sodium (MS) (IRM-100), ischemia-reperfusion +200 mg/kg MS (IRM-200), and healthy group applied sham operation (SG).

Results: Myeloperoxidase (MPO) activity and gene expression increased significantly in IRC and IRM-100 group rat ovarian tissue compared with the SG group (P < 0.

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Background: Varicocele is an abnormal enlargement of the pampiniform venous plexus in the scrotum. Varicocele is the most common cause of secondary male infertility. Nitric oxide (NO), which has a role on varicocele pathophysiology, is synthesized by endothelial nitric oxide synthase gene (NOS3).

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Objective: The aim of this study was to assess the impact of resveratrol (RST) on oxidative stress induced by methotrexate in rat ileum tissue.

Materials And Methods: Twenty-four rats were divided into 4 groups with 6 in each group. Each rat was orally administered the following every day for 30 days: group 1 (MTXG), methotrexate (MTX; 5 mg/kg); group 2 (RMTXG), MTX (5 mg/kg) plus RST (25 mg/kg/day); group 3 (RSTG), RST alone (25 mg/kg/day), and group 4 (controls), distilled water.

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No comparative study could be found for the analgesic activity of mucuses from the Oncorhynchus mykiss (OM), Salvelinus fontinalis (SF), Salmo coruhensis (SC), Acipenser gueldenstaedtii (AG), and Acipenser baerii (AB) fish species in the literature. We aimed to investigate the effects of mucuses obtained from the abovementioned fish species on scalpel incision-induced pain in the rat paw and to examine the role of oxidant/antioxidant parameters and COX-2 gene expression in the analgesic activities. Animals were divided into groups: SIC (scalpel incision; SI), SIDS (SI+25 mg/kg diclofenac sodium), SOM (SI+25 mg/kg OM mucus), SFM (SI+25 mg/kg SF mucus), SCM (SI+25 mg/kg SC mucus), SAgM (SI+25 mg/kg AG mucus), SAbM (SI+25 mg/kg AB mucus), and HG (healthy).

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The effect of resveratrol on the damage induced by methotrexate (MTX) in rat duodenum and jejunum tissue was investigated and evaluated in comparison with famotidine. The rats were divided into four groups as healthy group (HG), resveratrol+MTX (RMTX) group, famotidine+MTX (FMTX) group and the control group which received MTX (MTXC). RMTX group was given resveratrol 25 mg/kg and FMTX group famotidin 25 mg/kg, while MTXC and HG groups were orally administered distilled water once a day for 30 days.

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High numbers of proinflammatory cells (PMNLs), which are carried by the blood to ischemic tissue during reperfusion, are considered responsible for inducing the inflammatory response that occurs in ischemia-reperfusion (I/R) injury. Our objective was to determine the controlled reperfusion (CR) interval duration (CRID) that would minimize the injury caused by the PMNLs that infiltrate ischemic tissue. Animal groups were divided into the following groups: Sham group, ovarian I/R group (OIR), and ovarian ischemia controlled-reperfusion groups OICR-1, OICR-2, OICR-3, OICR-4, OICR-5, OICR-6, which had their ovarian artery opened and then closed for 10, 8, 6, 4, 2, or 1 s, respectively.

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