PubMed İndeksli Yayınlar Koleksiyonu
Permanent URI for this collectionhttps://hdl.handle.net/20.500.14627/8
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Article Small Extracellular Vesicles in Tumor Metabolism and Immune Escape: Biomarkers and Therapeutic Opportunities(Springer, 2026) Ganjalikhani-Hakemi, Armita; Ghadiri, Nooshin; Ganjalikhani-Hakemi, Mazdak; Aru, Basak; Hosseini, RezaMetabolic reprogramming is a key characteristic of cancer. It is increasingly seen as a process influenced by ongoing communication between cells in the tumor microenvironment (TME). Small extracellular vesicles (sEVs) are 30-100 nm membrane-bound particles that tumor cells release in large amounts. These vesicles play an important role in the exchange of metabolic information. Besides proteins and nucleic acids, sEVs carry bioactive metabolites, lipids, and metabolic enzymes that can change the energy and building processes in recipient cells. Although there is growing evidence that sEVs contribute to metabolic changes, a complete understanding of how their varied contents relate to coordinated changes in metabolism across tumor, immune, and stromal areas is still lacking. In this review, we summarize recent findings showing that tumor-derived sEVs function like metabolic Trojan horses. They can trigger changes in glycolysis, accumulate lipids, and create dependencies on amino acids in recipient cells. This helps promote immune suppression, blood vessel growth, and resistance to treatment. We highlight the new idea of multi-metabolite sEV signaling as a factor in shaping the immunosuppressive environment of the TME. We also identify potential targets for intervention in sEV production, cargo loading, and cellular uptake, such as nSMase2, CD9/CD63-associated complexes, and macropinocytosis pathways. By combining insights from immunometabolism, cancer signaling, and the biology of extracellular vesicles, we propose that sEVs are not just biomarkers. They actively organize tumor metabolic systems and serve as valuable tools for precise immunology in cancer treatment.Article Statistical Analyses of Morphological Variations of Three Larroussius (Diptera: Psychodidae) Sister Species Collected in Leishmaniasis Endemic Foci of Adana in Turkiye(Wiley, 2026) Kavur, Hakan; Uckayabasi, Hale Oksuz; Alptekin, DavutSand flies are arthropod vectors responsible for transmitting Leishmania parasites to humans. Among them, Phlebotomus (P.) major, P. syriacus and P. neglectus are closely related sister species that play an important role in disease transmission in Türkiye. This study aimed to statistically analyse the morphological measurements of these three species and to identify reliable diagnostic characters. Seven morphometric traits were measured in both female and male specimens. Statistical analyses, including analysis of variance (ANOVA), discriminant function analysis (DFA) and principal component analysis (PCA), were performed to determine significant variables contributing to species differentiation. A total of 1729 sand flies were collected, comprising P. tobbi (44.58%), P. papatasi (21.26%), P. similis (20.30%), P. neglectus (8.50%), P. major (2.88%), P. syriacus (2.19%) and Sergentomyia (S.) fallax (0.27%). The female-to-male ratio was 1.42. ANOVA revealed significant interspecific differences (p < 0.001) in antennal, pharyngeal and genital characters. In females, P. neglectus exhibited shorter antennal segments A3 and A4 + A5, P. syriacus had the shortest pharynx (PHX), and P. major showed the longest epipharynx (EPI). In males, P. major had the longest coxite (CX), whereas P. neglectus displayed the shortest second style segment (S2) (p < 0.05). DFA confirmed clear species separation, with antennal and pharyngeal traits primarily driving differentiation in females, and genital characters being most informative in males. PCA explained 78.37% and 90.24% of the total morphometric variation in females and males, respectively, highlighting sex-specific patterns of morphological variation. Overall, these statistically supported morphometric differences provide robust diagnostic features that can complement molecular approaches, improving species identification and enhancing taxonomic resolution in sand fly vector studies.Article Oral Antipyretics for Fatigue Alleviation and Exercise Enhancement in Adults with Multiple Sclerosis: A Systematic Review and Meta-Analysis(Springer-Verlag Italia SRL, 2026) Hamdy, Ahmed Mohamed; Elmandrawi, Sara Wael; Ibrahim, Ismail A.; Shehata, Mazen Momtaz; Raza, Muhammad Liaquat; Elemam, Ahmed Mahmoud Elsayed; Elewa, MandyAims This review aims to explore the potential role of oral antipyretics (aspirin (ASA)/ acetaminophen), commonly known for fever and pain control, in managing fatigue, temperature regulation, and exercise capacity in patients with Multiple Sclerosis (MS), with a focus on nursing implications for symptom management. Design A systematic review of existing clinical studies assessing the effects of aspirin/ acetaminophen on MS-related fatigue, thermoregulation, and exercise performance. Data sources Electronic databases including Cochrane Central Register of Controlled Trials (CENTRAL), EMBASE, PubMed, Scopus, Web of Science, Wiley, Google Scholar, and ClinicalTrials.gov were searched up to March 2024. Review methods Quality assessment was conducted using the Cochrane risk of bias tool 2. to evaluate the methodological rigor of included studies. Outcomes analyzed included clinically assessed fatigue scores, exercise endurance, and postexercise thermoregulation, with attention to potential risks associated with aspirin use. Results After assessment of 57 reports for eligibility, only seven studies met inclusion criteria; results indicated that aspirin pretreatment significantly improved Time to Exhaustion (TTE) in heat-sensitive MS patients (p = 0.013), though one study reported no significant effect. Aspirin reduced post-exercise temperature rise by 56%, but this was not statistically significant in one trial (p = 0.178), while another showed significant reductions (p = 0.002). Conclusion Aspirin and acetaminophen may offer benefits in alleviating fatigue, enhancing thermoregulation, and improving exercise endurance in MS patients. These findings suggest that nurses should consider the potential role of aspirin in symptom management, with further research needed to confirm efficacy and safety. Impact This review highlights a potential adjunct therapy for nurses to incorporate into comprehensive MS care, emphasizing symptom control and quality of life improvements.Article Protective Effects of L-Theanine against Bisphenol A-Induced Oxidative Stress and Gut Microbiota Disruption in Wistar Rats(Springer, 2026) Sener, Azize; Marzi, Mahdi; Sener, Goksel; Donmez, Muhammet OguzhanBackground Gut microbiota homeostasis plays a central role in maintaining intestinal redox balance and immune regulation. Bisphenol A (BPA), a widely distributed environmental contaminant, has been associated with oxidative stress, inflammatory responses, and disturbances in intestinal microbial communities. L-theanine (LTN), a bioactive amino acid naturally present in green tea, possesses well-documented antioxidant and anti-inflammatory properties; however, its potential protective role against BPA-induced intestinal injury has not been fully clarified. Methods and Results In the present study, female Wistar albino rats were randomly allocated into three groups: control, BPA (50 mg/kg/day), and BPA + LTN (100 mg/kg/day) and treated for 30 days. Oxidative stress and inflammatory responses in intestinal and colonic tissues were assessed by measuring malondialdehyde (MDA), reduced glutathione (GSH) levels and myeloperoxidase (MPO), catalase (CAT) activities. BPA exposure significantly increased MDA (p < 0.001) level and MPO (p < 0.001) activity while reducing GSH content (p < 0.001) and CAT activity (p < 0.001) compared with the control group. Compared to the BPA group, LTN treatment led to significant changes in MDA, MPO, and GSH levels in both tissues. MDA and MPO levels were significantly reduced in the intestine and colon tissues of the BPA + LTN group (p < 0.001). GSH and CAT levels were significantly increased in both the intestine and colon compared to the BPA group (p < 0.001). In addition, fecal microbiota composition was analyzed using 16 S rRNA gene sequencing, with taxonomic profiling performed at the phylum, genus and species levels. BPA exposure was associated with reduced microbial stability and compositional shifts within the gut microbiota, whereas LTN treatment partially restored microbial richness and community structure. Conclusions Collectively, these findings indicate that LTN alleviates BPA-induced intestinal oxidative stress and microbiota dysbiosis, suggesting its potential as a protective dietary compound against environmental toxicant-related intestinal injury.Article Modulation of Brain Antioxidant Defense, Inflammation, and SIRT1 Activity by a Sunflower Oil-Based High-Fat Diet: Protective Role of L-Arginine in Rats(Springer, 2026) Şekerler, Turgut; Şener, Azize; Çavuşoğlu, Nuray; Doğan, ÖzgeBackgroundChronic consumption of omega-6-enriched dietary fat may disturb brain redox balance and neuroinflammatory homeostasis. Among the sirtuins, sirtuin 1 (SIRT1) exerts critical neuroprotective functions by suppressing oxidative stress and inflammatory signaling; however, the impact of sunflower oil-based high-fat diets (SO-HFD) on brain SIRT1 activity has not been investigated.ObjectiveThis study aimed to investigate the effects of SO-HFD on oxidative stress parameters, inflammatory markers, and SIRT1 activity in rat brain tissue, and to evaluate the potential modulatory role of L-arginine supplementation.MethodsFour-week-old female Sprague-Dawley rats were allocated into three groups: control, SO-HFD, and SO-HFD + L-arginine. Both SO-HFD groups were fed a diet containing sunflower oil for 16 weeks; from week 10 onward, 1.5% L-arginine was supplemented in the drinking water of the SO-HFD + L-arginine group. Following the 16-week protocol, serum and brain specimens were collected. Serum biochemical parameters and adiponectin were quantified; brain homogenates were assayed for lipid peroxidation (MDA), reduced glutathione (GSH), protein thiols (protein-SH), nitric oxide (NO), tumor necrosis factor-alpha (TNF-alpha) levels, and SIRT1 activity.ResultsAlthough brain MDA levels were not significantly elevated, SO-HFD animals exhibited reduced GSH and protein-SH content together with diminished SIRT1 activity. The SO-HFD increased TNF-alpha and NO levels. L-arginine supplementation decreased MDA and increased GSH, protein-SH, and SIRT1 activity. L-arginine also suppressed TNF-alpha levels in brain tissue compared to the SO-HFD group. NO levels in the SO-HFD + L-arginine group were lower than in the SO-HFD group, though not significantly.ConclusionThese findings suggest that chronic exposure to an omega-6-dominant dietary environment disturbs redox regulation and inflammatory balance in brain tissue, accompanied by reduced SIRT1 activity. L-arginine may attenuate cerebral oxidative stress and neuroinflammation by reinforcing endogenous antioxidant mechanisms, highlighting its potential as a nutritional strategy against SO-HFD-induced brain oxidative stress.Article Women’s Biopsychosocial Experiences Following Embryo Transfer: A Qualitative Study(Elsevier Masson, Corp Off, 2026) Baltacı, Nurşah Boylu; Aslan, Ergül; Coşkun, MervePurpose: This study explored the physical, psychological, and social experiences of women during the waiting period following embryo transfer (ET) in In Vitro Fertilization (IVF) and provides recommendations regarding psychosocial support needs. Materials and methods: A descriptive phenomenological design with thematic analysis was used. Semi-structured telephone interviews (30-45 min) were conducted with 29 women who underwent ET at a private IVF center in Istanbul from April to July 2025. Data were coded and analyzed using MAXQDA 24, and themes and subthemes were identified. Results: Participants had a mean age of 32.8 years, infertility duration of 2.8 years, 2.2 of IVF attempts, and 2.5 ETs. Most women were employed (69%), 72% had no previous pregnancies, and 86% had undergone multiple IVF attempt. Four main themes emerged in the thematic analysis: physical effects, psychological effects, social effects, and coping strategies. Subthemes varied by marital duration, previous IVF experience, and number of ETs; effects were stronger among women with multiple ETs. Conclusion: Women experience multidimensional challenges following ET and adopt various coping strategies. Physical changes disrupt daily life, emotional fluctuations stem from uncertainty and anxiety, and partner/social support and trust in healthcare professionals are critical for mitigating anxiety and improving quality of life and treatment adherence.Article Synergistic Anticancer Effects of the PLK1 Inhibitor BI-2536 and β-Glucan in Colon and Gastric Cancer Cells(International Institute of Anticancer Research, 2026) Saraç, Bülent; Joha, Ziad; Takci, Rabia Gökçe; Hacisüleyman, Levent; Şahİnbaş, BurcuArticle Sub-Cytotoxic Mitochondrial Stress in Cardiomyocytes and Whole-Organism Toxicity in C. Elegans Induced by Molnupiravir(SAGE Publications Inc, 2026) Gunaydin-Akyildiz, Aysenur; Keskin, Zehra; Ozhan, Gul; Kuran, Ebru Didem; Gulec, MeltemMany antiviral agents are known to induce off-target mitochondrial toxicity due to the prokaryotic origin of mitochondria. Mitochondrial dysfunction is frequently linked to cardiotoxicity. We aimed to elucidate the mitochondrial toxicity profile of molnupiravir via focusing on mitochondrial dynamics, biogenesis, and oxidative stress in cardiac cells. Mitochondrial function was evaluated by luminometric measurement of ATP (adenosine triphosphate) content, and flow cytometric analysis of mitochondrial membrane potential, and mitochondrial mass. The expression levels of genes involved in mitochondrial fusion-fission were assessed by RT-PCR. In addition, molecular docking analysis was performed to evaluate the interaction between molnupiravir and the dynamin related-protein DRP1. Protein carbonylation was determined as an oxidative stress parameter. Toxicity evaluation was further investigated in Caenorhabditis elegans to support the in vitro findings at the organismal level. Molnupiravir exposure led to a significant dose-dependent reduction in intracellular ATP level and mitochondrial mass, accompanied by increased protein carbonylation. Mitochondrial membrane potential remained slightly increased. Alterations in the expression of genes regulating mitochondrial dynamics suggested an imbalance between fusion and fission processes, while mitochondrial biogenesis-related signaling was progressively suppressed. C. elegans exposed to higher concentrations of the drug (20-500 & micro;M) exhibited significant lifespan reduction at all doses. Molecular docking analysis demonstrated a moderate binding affinity of molnupiravir to DRP1, supporting a potential direct interaction with mitochondrial fission machinery. In conclusion, our results demonstrate that molnupiravir induces mitochondrial stress through oxidative damage, impaired biogenesis, and altered dynamics, emphasizing the need for careful evaluation of mitochondrial safety of molnupiravir in cardiac tissue.Article Shoulder Muscular Activation during Common Kettlebell Exercises: A Randomized Cross-Sectional Surface EMG Study(Taylor & Francis Inc, 2026) Paköz, Büşra; Işiklar, Çağdaş; Turgut, ElifPurpose This study aimed to examine shoulder muscle activation patterns within functionally similar upper-body exercise categories performed using different resistance modalities. Methods Twenty healthy males (mean age 22.6 +/- 1.69 years) performed overhead pressing, rowing, and swinging tasks using kettlebells, dumbbells, and elastic bands. Surface electromyography (EMG) was used to record activity from seven shoulder muscles. The recorded electromyographic signals were normalized to maximal voluntary isometric contractions (%MVIC), log-transformed, and analyzed using a two-way repeated-measures analysis of variance (ANOVA) with exercise and muscle as within-subject factors. Results A repeated-measures ANOVA on log-transformed EMG data showed significant main effects of exercise (F(2.10, 39.95)=22.04, p<.001, eta(2) p=.537) and muscle (F(4.49, 85.34)=47.55, p<.001, eta(2) p=.714), as well as a significant exercise & times;muscle interaction (F(8.16, 154.98)=82.84, p<.001, eta(2) p=.813). Within the overhead pressing category, the Bottoms-Up Kettlebell Overhead Press elicited significantly greater activation than the traditional Kettlebell Overhead Press in the upper trapezius, lower trapezius, biceps brachii, and infraspinatus (all p<.050), with upper trapezius activation reaching 30.4 +/- 13.4%MVIC. In the rowing category, middle and lower trapezius activation was greater during free-weight rowing than during elastic band rowing, while serratus anterior activation remained relatively low across the rowing conditions. In the swing category, activation patterns were largely comparable between the two-hand kettlebell and dumbbell swings, whereas the one-hand kettlebell swing produced greater activation in selected muscles, with the lower trapezius showing the highest activation. Absolute between-exercise differences in %MVIC were modest. Conclusion Kettlebell, dumbbell, and elastic band exercises elicit distinct shoulder muscle activation profiles. These findings may inform exercise selection and program design when targeting specific shoulder muscles within task-oriented training contexts.Editorial Monitoring Progress in Global Childhood Cancer Survival(Elsevier Science Inc, 2026) Kutluk, Tezer