Publications by authors named "Havva Keskin"

Objective: Copeptin is released from the posterior pituitary gland into systemic circulation in response to various stimuli, including stress. We aimed to evaluate the role of copeptin in determining the severity of the disease in patients with COVID-19.

Materials And Methods: The study was conducted prospectively in two centers between June 1, 2022, and October 1, 2022.

View Article and Find Full Text PDF

This awareness study aimed to determine the ultrasound (US) examination rates in relation to US-confirmed metabolic dysfunction-associated fatty liver disease (MAFLD) diagnosis in internal medicine outpatients with type 2 diabetes (T2D) across Türkiye. A total of 6283 T2D patients were included in this multicenter retrospective cohort study conducted at 17 internal medicine clinics across Türkiye. The presence and indications for US performed within the last 3 years were recorded along with US-confirmed MAFLD rates, laboratory findings on the day of US, and referral rates.

View Article and Find Full Text PDF
Article Synopsis
  • The study focuses on patients with lesions in the corpus splenium (CS) of the corpus callosum, aiming to link clinical and demographic features to the permanence of these lesions.
  • Researchers analyzed 93 patients, categorizing them into three groups based on lesion characteristics and found significant differences in age, disease duration, and lesion persistence among the groups.
  • Key findings suggest younger patients with shorter disease durations and specific blood measures are more likely to have temporary rather than permanent lesions in the CS.
View Article and Find Full Text PDF

Objectives: To explore the clinical significance of interleukin-1 and interleukin-6 in the development of lateralized temporal epilepsy.

Methods: The prospective study was conducted from January to April of 2022 at the Neurology Department of Training and Research Hospital, Istanbul Medeniyet University, Turkey, and comprised patients with lateralized temporal epilepsy aged 18-86 years who were in the interictal period in group A and healthy controls in group B. The levels of interleukin-1 and interleukin-6 of patients in both groups were compared.

View Article and Find Full Text PDF

Objectives: There is a complex, reciprocal link between epilepsy and the hypothalami pituitary-adrenal (HPA) axis. This study aimed to evaluate the role of the HPA axis in individuals with focal epilepsy, including those with right- or left-hemispheric lateralized epilepsy.

Material And Methods: The study comprised 60 individuals with focal epilepsy, ages 18 to 85, with seizures coming from a single hemisphere, no destructive lesions on cranial magnetic resonance imaging, and 32 healthy persons.

View Article and Find Full Text PDF
Article Synopsis
  • A study compared neuropsychiatric evaluations between left-sided (LTLE) and right-sided (RTLE) temporal lobe epilepsy patients, with LTLE making up 68.3% of participants.
  • Results showed significant differences in performance on various cognitive tests, with LTLE patients generally scoring lower in memory and verbal fluency tasks compared to RTLE patients.
  • The findings suggest that specific cognitive tests, like those from the Wechsler scales, can help determine which hemisphere is affected in temporal lobe epilepsy cases.
View Article and Find Full Text PDF

Objectives: To investigate the usability of neopterin in demonstrating the progression of COVID-19. As a result of uncontrolled activation of COVID-19 monocytes and macrophages, IFN gamma increases and the resulting inflammatory response causes organ damage. IFN released from T cells causes an increase in gamma neopterin levels.

View Article and Find Full Text PDF

Background: People living with HIV need to use antiretroviral therapy throughout their lives.

Objectives: Studies on the efficacy and safety of dual therapy are limited in Turkey. We sought to evaluate the treatment efficacy and side effects among patients who were given a combination of dolutegravir (DTG) and lamivudine (3TC) as a maintenance therapy.

View Article and Find Full Text PDF
Article Synopsis
  • The study aimed to assess how well total lesion glycolysis (TLG) from 18F-FDG PET/CT scans could distinguish between malignant and benign solitary pulmonary nodules (SPNs).
  • Conducted at Istanbul Medeniyet University over four years, the observational study analyzed data from 80 patients with SPNs through various PET-CT parameters.
  • Findings showed that combining TLG with SUVmax improved the diagnostic accuracy, with TLG revealing higher sensitivity and specificity in identifying malignant nodules compared to SUVmax alone.
View Article and Find Full Text PDF
Article Synopsis
  • The study investigates the link between gestational diabetes mellitus (GDM) and the development of metabolic syndrome (MetS), focusing on inflammatory markers in former GDM patients.
  • Among 52 women evaluated, 27 (52%) were found to have MetS, with notable differences in levels of inflammation-related substances like C-reactive protein and interleukin-6.
  • The findings suggest that specific markers could be used for early detection of MetS, highlighting the importance of timely interventions to mitigate health risks associated with this condition.*
View Article and Find Full Text PDF

Objective: Primary hyperparathyroidism (PHPT) is one of the most frequent endocrine diseases. Most of the patients with PHPT are asymptomatic, and only 20% of them become symptomatic with increasing levels of calcium. It has been reported that normocalcemic primary hyperparathyroidism (NPHPT) may be the incipient period of PHPT where calcium (Ca) levels are in normal range, and it may advance to overt PHPT.

View Article and Find Full Text PDF
Article Synopsis
  • - Colorectal cancer (CRC) is common in both developed and developing countries, but its risk factors in rural China remain less understood.
  • - A study involving nearly 30,000 participants tested daily multivitamin/mineral supplements, finding that risk factors for CRC included age, height, family history, and certain dietary habits, with no overall impact from the supplements except a notable 37% reduction in CRC risk for women taking specific nutrients (selenium/alpha-tocopherol/beta-carotene).
  • - Results indicated that while some CRC risk factors are similar to those found in Western populations, there are unique aspects in this Chinese rural cohort, highlighting potential benefits of specific nutrient supplementation for women.
View Article and Find Full Text PDF

Introduction: Systemic lupus erythematosus (SLE) is a connective tissue disease that is chronic, recurrent and multisystem with unknown aetiology. There is still no single biomarker that is pathognomonic for the disease. We know that platelets are the main part of haemostasis and thrombosis.

View Article and Find Full Text PDF

Objective: Systemic amyloidosis may affect many organs, and may cause endocrinologic problems which may result in adrenal insufficiency. However, assessment of adrenocortical reserve is challenging in amyloidosis patients with renal involvement. We aimed to evaluate adrenocortical reserve with various methods of cortisol measurement to determine any occult clinical condition.

View Article and Find Full Text PDF

Objective: Our aim in this study is to define the histopathological subtypes, body site distribution, and incidence rates of single or multiple of BCCs. The study is conducted on patients from a single institution in Istanbul which has a migrant-receiving population reflecting that of the country overall.

Method: We retrospectively analyzed data concerning 896 cases of BCC seen between 2014 and 2018.

View Article and Find Full Text PDF

DNA double-stranded breaks (DSBs) are dangerous lesions threatening genomic stability. Fidelity of DSB repair is best achieved by recombination with a homologous template sequence. In yeast, transcript RNA was shown to template DSB repair of DNA.

View Article and Find Full Text PDF

Despite the abundance of ribonucleoside monophosphates (rNMPs) in DNA, sites of rNMP incorporation remain poorly characterized. Here, by using ribose-seq and Ribose-Map techniques, we built and analyzed high-throughput sequencing libraries of rNMPs derived from mitochondrial and nuclear DNA of budding and fission yeast. We reveal both common and unique features of rNMP sites among yeast species and strains, and between wild type and different ribonuclease H-mutant genotypes.

View Article and Find Full Text PDF
Article Synopsis
  • Cancer patients often experience symptoms like muscle pain, joint pain, fever, and breathing difficulties after their first chemotherapy cycle, potentially linked to cytokines, though the exact cause is not fully understood.* -
  • A study involving 44 cancer patients examined the relationship between these symptoms and serum levels of specific cytokines (IL-2, IL-11, TNF-α, VEGF) before and after chemotherapy, but no significant associations were found.* -
  • While a decrease in IL-11 levels was noted in one treatment group, overall, the study concluded there was no direct link between the symptoms experienced, response to chemotherapy, and the cytokine levels measured.*
View Article and Find Full Text PDF
Article Synopsis
  • Pediatric brain cancer medulloblastoma (MB) has various subgroups, with Group 3 facing the highest relapse rates and a low survival rate of 20% following standard treatment, prompting exploration of new therapies targeting GABRA5 and its receptor.
  • Research shows that Group 3 MB tumors have a high presence of functional GABA type A receptors (GABAR), which play a role in regulating cell viability and chloride ion flow.
  • A promising benzodiazepine derivative, 'KRM-II-08', binds to α5-GABAR and induces cell death in Group 3 cells by disrupting ion balance, positioning GABRA5 as both a potential diagnostic marker and therapeutic target for this aggressive subgroup.
View Article and Find Full Text PDF

A double-strand break (DSB) is one of the most dangerous DNA lesion, and its repair is crucial for genome stability. Homologous recombination is considered the safest way to repair a DNA DSB and requires an identical or nearly identical DNA template, such as a sister chromatid or a homologous chromosome for accurate repair. Can transcript RNA serve as donor template for DSB repair? Here, we describe an approach that we developed to detect and study DNA repair by transcript RNA.

View Article and Find Full Text PDF
Article Synopsis
  • There is currently no validated questionnaire in Turkish to measure asthma knowledge, prompting the need for this study.
  • The study involved translating the Asthma Self-Management Knowledge Questionnaire into Turkish, testing its reliability and validity on 202 adult asthma patients.
  • Results indicated a moderate internal reliability for the questionnaire, with a strong consistency among its questions and a proposed structure measuring various aspects of asthma knowledge.
View Article and Find Full Text PDF

We aimed to compare composite indices with Ultrasound Global Synovitis Score (GLOESS) for remission in rheumatoid arthritis (RA). RA patients in remission according to the clinician were investigated with Disease Activity Score28 (DAS28), Clinical Disease Activity Index (CDAI), Simplified Disease Activity Index (SDAI), and RAPID-3 (Routine Assessment of Patient Index Data 3). Ultrasonography was performed using the GLOESS scores.

View Article and Find Full Text PDF

Objectives: Subclinical disease activity in rheumatoid arthritis (RA) detected by imaging methods is predictive for flares and damage. Lack of time is the major limitation for not screening for subclinical disease in routine practice. We aimed to determine the most feasible protocol to screen patients with no clinical disease activity by ultrasound (US).

View Article and Find Full Text PDF

RNA can serve as a template for DNA double-strand break repair in yeast cells, and Rad52, a member of the homologous recombination pathway, emerged as an important player in this process. However, the exact mechanism of how Rad52 contributes to RNA-dependent DSB repair remained unknown. Here, we report an unanticipated activity of yeast and human Rad52: inverse strand exchange, in which Rad52 forms a complex with dsDNA and promotes strand exchange with homologous ssRNA or ssDNA.

View Article and Find Full Text PDF

Objective: The neutrophil-lymphocyte ratio (NLR), determined from peripheral blood, is accepted as an available and practical indicator of the systemic inflammation. In this study, we aimed to determine whether the NLR was higher in euthyroid chronic autoimmune thyreotidis (CAT) patients compared to a healthy control group.

Methods: A total of 112 patients were enrolled in this study, including 59 patients with euthyroid CAT on any form of therapy and 53 healthy controls.

View Article and Find Full Text PDF