Publications by authors named "Karatas H"

Iron, a vital element for numerous peripheral and central nervous system functions, is a key player in DNA synthesis, gene expression, myelination, neurotransmission, and mitochondrial electron transport. Iron has utmost importance in various neurological functions, including neurotransmitter synthesis and brain cell metabolism. Migraine is a neurogliovascular disorder in which neuroinflammation plays a crucial role.

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This study aims to explore the concept of liminality in the lives of chronic kidney disease (CKD) patients in Turkiye who are undergoing dialysis while awaiting kidney transplants. The research focuses on how patients experience this transitional state, being between life stages, and how they cope with the uncertainty of their condition while aspiring for a transplant. The research involved in-depth, semi-structured interviews and participant observations of 34 dialysis patients who had been registered on the national organ waiting list for over five years.

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Article Synopsis
  • The study investigates the progression of Behçet's disease when it starts in childhood and how it affects patients in adulthood.
  • Out of 112 pediatric patients, 93 were analyzed, revealing that around 52.5% had major organ involvement, primarily affecting the eyes, with some showing new complications as they transitioned into adulthood.
  • The findings highlight the importance of continued monitoring for these patients, as nearly one-third experienced new symptoms or relapses post-childhood, underscoring the need for regular follow-ups to mitigate potential long-term damage.
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Article Synopsis
  • Extracellular aggregation of amyloid-beta (Aβ) in the brain is linked to Alzheimer's disease (AD), and its intraneuronal accumulation may also contribute to disease progression.
  • The study investigates the effect of tripeptidyl peptidase-1 (TPP1), a lysosomal enzyme, and its recombinant form (cerliponase alfa) in reducing Aβ levels within neuron cells while examining the role of autophagy.
  • Results showed that cerliponase alfa decreased Aβ accumulation and triggered autophagy-related pathways, suggesting TPP1 enhancement might be a potential Alzheimer’s therapy.
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Many patients with depressive disorder do not respond to conventional antidepressant treatment. There is an ongoing interest in investigating potential mechanisms of treatment resistance in depression to provide alternative treatment options involving inflammatory mechanisms. Increasing evidence implicates the NOD-like receptor pyrin domain containing 3 (NLRP3) inflammasome as a critical factor in neuroinflammation.

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Hearing loss is one of the most common types of disability in the world. Studies have reported that mothers with disabilities have some difficulties in fulfilling their maternal role in childcare. This study was conducted to determine the experiences of mothers with hearing impairment regarding the care of their children.

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Migraine is a neurological disorder characterized by episodes of severe headache. Cortical spreading depression (CSD), the electrophysiological equivalent of migraine aura, results in opening of pannexin 1 megachannels that release ATP and triggers parenchymal neuroinflammatory signaling cascade in the cortex. Migraine symptoms suggesting subcortical dysfunction bring subcortical spread of CSD under the light.

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To achieve expertise, transplant surgeons in Turkiye undergo rigorous training, including medical school, residency, compulsory service, and extensive training in transplant surgery. Despite their high academic and clinical knowledge level, success in transplant surgery heavily depends on cultural competency. Through semi-structured interviews with 21 transplant surgeons specializing in kidney and liver transplants in Ankara, this study reveals how health illiteracy, culture, and folklore create significant barriers.

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Advancements in medicine introduced a relatively invented death into our lives: Brain Death. It intermingles with our perceptions of classical death due to knowing the heart is beating, the color of the skin is pink, and the body's temperature is warm. Hence, accepting brain death as death might get complicated in terms of relatives of the brain-dead person.

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ObjectiveThe purpose of this study was to compare the peer bullying of refugee and non-refugee adolescents, and to explore the association between bullying victimization and psychiatric symptoms among Syrian adolescent refugees in the Southeast Anatolia region of Turkey. The sample of the study consists of 217 adolescents in the 13-17 age group who are school-going, 102 refugee adolescents, and 115 non-refugee adolescents. The study data was obtained using the Sociodemographic Characteristics Questionnaire developed by the researchers, Olweus Bully/Victim Questionnaire (OBVQ) and Depression Anxiety Stress Scale 42 (DASS-42).

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Background: Despite Non-small cell lung cancer (NSCLC) ranks among the most deadly cancers worldwide, and currently, apart from a low percentage, targetable molecules have not been identified in its etiopathogenesis. The relationship between the proteoglycans decorin and biglycan, which are present in the extracellular matrix of cells, and transforming growth factor Beta-1 (TGF-B1), has been shown in many cancers. We investigated the significance of these molecules in NSCLC.

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The role of high mobility group box 1 (HMGB1) in inflammation is well characterized in the immune system and in response to tissue injury. More recently, HMGB1 was also shown to initiate an "inflammatory signaling cascade" in the brain parenchyma after a mild and brief disturbance, such as cortical spreading depolarization (CSD), leading to headache. Despite substantial evidence implying a role for inflammatory signaling in prevalent neuropsychiatric disorders such as migraine and depression, how HMGB1 is released from healthy neurons and how inflammatory signaling is initiated in the absence of apparent cell injury are not well characterized.

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Introduction: Lipoxygenases (LOXs) have essential roles in stroke, atherosclerosis, diabetes, and hypertension. 12/15-LOX inhibition was shown to reduce infarct size and brain edema in the acute phase of experimental stroke. However, the significance of 12/15-LOX on neuroinflammation, which has an essential role in the pathophysiology of stroke, has not been clarified yet.

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Background: Cortical spreading depolarization (CSD), the neurophysiological correlate of the migraine aura, can activate trigeminal pain pathways, but the neurobiological mechanisms and behavioural consequences remain unclear. Here we investigated effects of optogenetically-induced CSDs on headache-related behaviour and neuroinflammatory responses in transgenic mice carrying a familial hemiplegic migraine type 1 (FHM1) mutation.

Methods: CSD events (3 in total) were evoked in a minimally invasive manner by optogenetic stimulation through the intact skull in freely behaving wildtype (WT) and FHM1 mutant mice.

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Introduction: Idiopathic intracranial hypertension (IIH) symptoms include headache, blurred vision, and papilledema which may lead to permanent vision loss unless diagnosed and treated. Definitive diagnosis of IIH usually requires the measurement of intracranial pressure (ICP) via lumbar puncture (LP) which is an invasive and unwanted technique for patients. In our study, optic nerve sheath diameters (ONSD) were measured before and after lumbar puncture in IIH patients and the relationship of these measurements with ICP changes was evaluated as well as the effect of decreasing cerebrospinal fluid (CSF) pressure after a lumbar puncture on ONSD.

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Objective: Immunosuppressives (IS) are the choice of treatment for major organ involvement in Behçet's disease (BD). In this study, we aimed to investigate the relapse rate and new major organ development in BD under ISs during long-term follow-up.

Methods: The files of 1114 BD patients followed in Marmara University Behçet's Clinic were analyzed retrospectively.

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Unlabelled: Favipiravir is a wide-spectrum antiviral generic drug that has received large attention during the recent COVID-19 pandemic. While there are synthetic strategies for favipiravir synthesis, economical procedures could contribute to industrial scale synthesis and availability. Accordingly, our efforts focused on an economic and scalable procedure for favipiravir synthesis via the 3,6-dichloropyrazine-2-carbonitrile intermediate obtained from 3-aminopyrazine-2-carboxylic acid.

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This study was carried out to determine the knowledge levels of nurses working in Family Health Centers (FHCs) about childhood autism. This study is a descriptive and cross-sectional study. The sample of the study consisted of 361 nurses working in FHCs in the province with the highest child population rate in Turkey.

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Background: Secretoneurin is a neuropeptide expressed from endocrine, neuroendocrine, and neural tissues. Our study aimed to investigate whether there was a relationship between secretoneurin levels and the severity of traumatic brain injury (TBI).

Methods: Ninety patients aged over 18 years who were admitted to the emergency department with head trauma between April 2020 and October 2020 and 20 healthy volunteers (control group) were included in the study.

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Objectives: This study aimed to determine the readmission rate after adenotonsillectomy with the diagnosis of obstructive sleep apnea (OSA) and analyze the factors associated with readmission.

Methods: It was planned as a retrospective study conducted in a single institution that included pediatric patients who underwent adenotonsillectomy with OSA diagnosis between December 2018 and March 2021. Patients who were readmitted for bleeding or pain/dehydration were compared with those who did not require readmission.

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Background: Unlike the spontaneously appearing aura in migraineurs, experimentally, cortical spreading depression (CSD), the neurophysiological correlate of aura is induced by non-physiological stimuli. Consequently, neural mechanisms involved in spontaneous CSD generation, which may provide insight into how migraine starts in an otherwise healthy brain, remain largely unclear. We hypothesized that CSD can be physiologically induced by sensory stimulation in primed mouse brain.

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Since Schiff base derivatives have a wide range of biological activities, novel Schiff base derivatives were designed and synthesized in satisfactory yields. H NMR, C NMR, IR, mass and elemental analysis were used to provide a complete structural characterization of the new synthesized Schiff bases (). The antiproliferative activity properties of compounds were tested against two human cancer cell lines including breast (MDA-MB-231) and colon (DLD-1).

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Background: A pyrimidine based Schiff base was examined in this report. Structural and spectral characterizations were done with Gaussian software. Active sites of the compound were determined using molecular electrostatic potential (MEP) maps.

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Objective: Children may be greatly affected by events that increase stress in individuals in general and are reported as the vulnerable groups during the coronavirus disease-19 (COVID-19) pandemic. But most of the studies in the literature investigating the mental effects of the pandemic on children were conducted with healthy children and limited study has evaluated the effect on children diagnosed with COVID-19. The aim of this study is to determine the anxiety level in paediatric patients diagnosed with COVID-19 and the affecting factors.

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