Publications by authors named "Luetfi Ozkan"

Unlabelled: The RASopathies are a group of disorders resulting from a germline variant in the genes encoding the Ras/mitogen-activated protein kinase pathway. These disorders include Noonan syndrome (NS), cardiofaciocutaneous syndrome (CFC), Costello syndrome (CS), Legius syndrome (LS), and neurofibromatosis type 1 (NF1), and have overlapping clinical features due to RAS/MAPK dysfunction. In this study, we aimed to describe the clinical and molecular features of patients exhibiting phenotypic manifestations consistent with RASopathies.

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Introduction: Prenatal determination of placenta accreta spectrum (PAS) and its severity is crucial, as it is a highly morbid condition. The aim was to investigate the intraplacental fetal artery (IFA) as a novel ultrasonographic marker in predicting cesarean-hysterectomy need in PAS.

Methods: A prospective observational cohort study was conducted with a total of 62 women with placenta previa and ≥1 previous cesarean-section who were managed for PAS between September 2022 and January 2024.

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Aim: In early-stage breast cancer, the axillary lymph nodes play a crucial role in determining the prognosis of the disease. The rate of lymph node involvement might be a more valuable prognostic factor than the number of positive lymph nodes. Therefore, we aimed to evaluate whether the lymph node ratio (LNR) is a superior prognostic indicator compared to the pathologic lymph node count in early-stage disease.

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Betulin is a bioactive compound found in large quantities in birch bark and has a triterpene pentacyclic structure. Through the oxidation of betulin, betulinic acid is obtained, which is found in large quantities in nature. Betulin and betulinic acid have multiple pharmacological properties such as antiviral, anti-inflammatory, and anticancer properties.

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Background: Preeclampsia is a serious pregnancy complication requiring early detection to improve outcomes. Profilin-1 (PFN1), linked to vascular dysfunction, may serve as a biomarker for diagnosing preeclampsia and predicting adverse neonatal outcomes. The aim of this study was to determine the serum Profilin-1 levels in patients diagnosed with preeclampsia and to investigate its association with disease severity and adverse neonatal outcomes.

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Objectives: This cross-sectional correlational study investigated the relationship between a hidden curriculum and fourth-year nursing students' career plans, professional values, and professional readiness.

Background: The hidden nursing education curriculum can influence professional outcomes. While nursing curriculum is designed to prepare students to become proficient nurses, the hidden curriculum is linked to unintended learning outcomes.

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Unexpected sounds have been shown to trigger a global and transient inhibition of motor responses. Recent evidence suggests that eye movements may also be inhibited in a similar way, but it is not clear how quickly unexpected sounds can affect eye-movement responses. Additionally, little is known about whether they affect only voluntary saccades or also reflexive saccades.

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Thousands died in the Kahramanmaraş-centered earthquake in February 2023, and even more were injured. Some were administered transdermal fentanyl patches (TFPs) due to severe pain. Two pediatric patients, both severely injured victims of the earthquake, developed dependence on TFPs and experienced difficulties during the cessation of fentanyl treatment.

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Inflammatory bowel disease (IBD) patients exhibit compromised intestinal barrier function and decreased mucus accumulation, as well as increased inflammation, fibrosis, and cancer risk, with symptoms often being exacerbated in women during pregnancy. Here, we show that these IBD hallmarks can be replicated using human Organ Chips lined by IBD patient-derived colon epithelial cells interfaced with matched fibroblasts cultured under flow. Use of heterotypic tissue recombinants revealed that IBD fibroblasts are the primary drivers of multiple IBD symptoms.

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This review explores the diverse applications of Bacillus thuringiensis (Bt) beyond its traditional role as a bioinsecticide. Bt produces a variety of compounds with distinct chemical structures and biological activities. These include antimicrobial agents effective against plant pathogens and bioactive compounds that promote plant growth through the production of siderophores, hormones, and enzymes.

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Objective: The aim of the study was to investigate the role of systemic immune-inflammation index (SII), systemic inflammation response index (SIRI), and pan-immune inflammation value (PIV) calculated from first trimester complete blood count (CBC) in predicting preeclampsia without (PE) and with severe features (PE-SF).

Methods: This retrospective cohort study included 126 women with PE, 126 women with PE-SF, and 126 women with healthy, normotensive pregnancies delivered at a large tertiary referral hospital between 2018 and 2022. The main outcome measures were SII, SIRI, and PIV.

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Objectives: As previous studies on the use of a cervical pessary to prevent preterm birth (PTB) have produced conflicting results, we aimed to investigate the feasibility, acceptability and safety of a new technique for inserting a cervical pessary and compare it with the traditional technique in patients at high risk of PTB.

Methods: Women at high risk of PTB treated with a cervical pessary between January 2018 and January 2021 were retrospectively evaluated. After applying exclusion criteria, a total of 68 eligible patients were identified and retrospectively analyzed.

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Background: This study aimed to create an algorithm using the decision tree method to classify patients with suspected acute cholecystitis into those who may improve with medical treatment, those who should undergo surgery for acute cholecystitis, and those with complicated cholecystitis, using laboratory parameters alone.

Methods: A total of 1,352 patients treated for acute cholecystitis at our hospital over four years were retrospectively analyzed. Patients were divided into groups based on whether they received medical treatment or surgery.

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Neuroblastoma is the most common malignancy in infants and the most common extracranial solid tumor accounting for approximately 6% of pediatric cancer. Although surgical intervention serves as the primary treatment for early-stage disease, advanced-stage cases necessitate a variety of oncologic therapeutic approaches, including 131I-MIBG and peptide receptor radionuclide therapy. Herein we report incidental pineal gland activity, represented in 68Ga-DOTATATE PET/CT (SSTR-PET) in 3 pediatric patients diagnosed with stage 4 neuroblastoma, related to the physiological distribution of radiopharmaceuticals.

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Article Synopsis
  • - This study explores how manipulating whiskers during early development affects adult learning and memory, focusing on tactile stimulation (TS) and spatial memory in rats.
  • - Four groups of Wistar albino male rats underwent different treatments: control, whisker trimming, tactile stimulation, and a combination of both, with results assessed using an 8-arm radial maze test.
  • - Findings showed that tactile stimulation negatively impacted spatial memory and neuronal density in the hippocampus, suggesting that early sensory deprivation can trigger learning through moderate stress, while excessive TS may disrupt normal development and materal care.
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The present study introduces the Persian Sentence Reading (PSR) Corpus, aiming to expand empirical data for Persian, an under-investigated language in research on oculomotor control in reading. Reading research has largely focused on Latin script languages with a left-to-right reading direction. However, languages with different reading directions, such as right-to-left and top-to-bottom, and particularly Persian script-based languages like Farsi and Dari, have remained understudied.

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Background: Eco-anxiety caused by climate change, which is a significant public health problem, has negative effects on sexual and reproductive health, and these effects are expected to increase continuously. This study was conducted to determine the relationship between eco-anxiety caused by climate change and the fertility preferences of women.

Methods: This descriptive study was conducted between June and August 2024 with 491 women at the ages of 18 to 49 who were registered at a family health center.

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Paracrine factors secreted by mesenchymal stem/stromal cells (MSCs) have been demonstrated to have significant therapeutic potential. The secretome profiles of MSCs variate depending on culture conditions. Generally, the effects of a single preconditioning strategy on secretome profiles of MSCs were investigated.

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Metaheuristic algorithms are an important area of research that provides significant advances in solving complex optimization problems within acceptable time periods. Since the performances of these algorithms vary for different types of problems, many studies have been and need to be done to propose different metaheuristic algorithms. In this article, a new metaheuristic algorithm called flood algorithm (FA) is proposed for optimization problems.

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This study investigated expressions of microRNA (miR)-26a, miR-27a, and miR-148a in plasma, colostrum and milk collected on different days (0th, 4th, 7th, 14th, and 28th days) during transition from colostrum to milk in Awassi sheep. Relationships between miRNAs and quality parameters were also explored. During transition, Somatic Cell Count, Fat-free dry matter, protein, lactose decreased, pH, freezing point (FP), electrical conductivity (EC) increased.

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Background And Aim: Diabetes has been shown in last decades to be associated with a significantly higher mortality among patients with ST-segment elevation myocardial infarction (STEMI) treated with primary PCI (PPCI). Therefore, the aim of current study was to evaluate the impact of diabetes on times delays, reperfusion and mortality in a contemporary STEMI population undergoing PPCI, including treatment during the COVID pandemic.

Methods And Results: The ISACS-STEMI COVID-19 is a large-scale retrospective multicenter registry involving PPCI centers from Europe, Latin America, South-East Asia and North-Africa, including patients treated from 1st of March until June 30, 2019 and 2020.

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Objective: Acute appendicitis is the most common cause of acute abdomen. It is important to differentiate between complicated and uncomplicated appendicitis before surgery in the emergency department. Recently, immature granulocytes have become one of the biomarkers used as predictors of inflammation.

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