WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection
Permanent URI for this collectionhttps://hdl.handle.net/11147/7150
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Article Citation - WoS: 8Protective and Therapeutic Effects of Milrinone on Acoustic Trauma in Rat Cochlea(Springer, 2019) Ceylan, Seyit Mehmet; Uysal, Erdal; Altinay, Serdar; Sezgin, Efe; Bilal, Nagihan; Petekkaya, Emine; Gulbagci, Mustafa EmreObjectiveThe aim of this study was to investigate the potential protective and therapeutic effects of milrinone, a specific phosphodiesterase (PDE) III inhibitor, on acoustic trauma-induced cochlear injury and apoptosis.MethodsA total number of 30 healthy Wistar albino rats were evenly divided into five groups as follows: group 1 was assigned as control group; group 2 and 3 were assigned as low-dosage groups (0.25mg/kg) in which milrinone was administered 1h before acoustic trauma (AT) and 2h after AT, respectively; group 4 and 5 were assigned as high-dosage groups (0.50mg/kg) in which the drug was administered 1h before AT and 2h after AT, respectively. Except control group, all treatment groups received a single dosage of milrinone for 5days. Distortion product otoacoustic emissions (DPOAE) measurements were recorded before AT as well as at second and fifth post-traumatic days. At the end of fifth day, all rats were sacrificed and the cochlea of the rats was removed for histopathological evaluation. In addition, the groups were compared in terms of apoptotic index via caspase-3 staining.ResultsIn terms of signal-to-noise ratio (SNR), there was no statistically significant difference among the groups following AT (p>0.05). After 5days of milrinone treatment, the best SNR values were found in group 5, though all groups did not statistically differ (p>0.05). In histopathological evaluation, vacuolization, inflammation, and edema scores in all treatment groups were statistically lower than those of the control group (p<0.05). In group 2 and 4 where the drug was administered before AT, the inflammation and apoptosis index was lower than those of group 3 and 5 where the drug was administered after AT (p<0.0001).ConclusionWe reveal that milrinone has a protective effect on cochlear damage in the experimental acoustic model of rats. This protective effect was more apparent following the pre-traumatic milrinone administration, and is associated with its effect on decreasing inflammation and apoptosis. Based on DPOAE measurements following AT, especially in the group 5 (high-dosage group), milrinone may also have a therapeutic effect.Article Plasma Proteomic Markers of Interleukin-1β Pathway Associated With Incident Age-Related Macular Degeneration in Persons With Aids(Elsevier, 2025) Hunt, Peter W.; Olshen, Adam B.; Murad, Natalia; Ambayec, Gabrielle C.; Sezgin, Efe; Schneider, Michael F.; Jabs, Douglas A.Objective To evaluate the associations of plasma inflammatory proteins with age-related macular degeneration (AMD) in persons with the AIDS, using a discovery-based proteomics approach. Design A nested case-control study (analysis 1) and nested cohort study (analysis 2). Participants Persons with AIDS enrolled in the Longitudinal Study of the Ocular Complications with AIDS (LSOCA). Methods Cryopreserved plasma specimens obtained at baseline were assayed for inflammatory proteins using the Olink Inflammation Explore Panel 1. In analysis 1, baseline proteomic profiles for 26 persons with AIDS and incident intermediate-stage AMD 5 to 10 years after baseline and 49 matched controls (matched for age, biologic sex, race/ethnicity, and follow-up) without AMD were compared. In analysis 2, 475 persons from LSOCA with baseline plasma inflammatory proteomic profile measurements were followed for incident cataract and mortality. Main Outcome Measures Incident intermediate-stage AMD; incident cataract; and mortality. Results Of 365 measurable plasma inflammatory proteins, 118 (32%) were associated with incident intermediate-stage AMD at the false discovery rate-adjusted Q < 0.05 level after adjustment for smoking, CD4+ T count, and plasma human immunodeficiency virus RNA level. Gene ontology pathway enrichment analysis identified the interleukin (IL)-1 beta pathway and wound healing pathways, including tissue inhibitor of metalloproteinase 3, as significantly associated with incident AMD. These associations were qualitatively different from those associated with incident cataracts, where elevated levels of inflammatory proteins were associated with a decreased risk of cataracts. A much broader number of inflammatory pathways, including those related to the adaptive immune system, were associated with mortality. Conclusions Upregulation of the IL-1 beta pathway appears to be associated with an increased risk of incident AMD in persons with AIDS. Given the availability of inhibitors of this pathway, inhibition of the IL-1 beta pathway may provide a therapeutic avenue for treatment of AMD. Financial Disclosure(s) Proprietary or commercial disclosure may be found in the Footnotes and Disclosures at the end of this article. Ophthalmology Science 2025;5:100794 (c) 2025 by the American Academy of Ophthalmology. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).Article Citation - WoS: 1Citation - Scopus: 1Altitude Shapes Gut Microbiome Composition Accounting for Diet, Thyroid Hormone Levels, and Host Genetics in a Subterranean Blind Mole Rat(Frontiers Media Sa, 2024) Solak, Halil Mert; Kreisinger, Jakub; Cizkova, Dagmar; Sezgin, Efe; Schmiedova, Lucie; Murtskhvaladze, Marine; Yanchukov, AlexeyThe animal gut microbiome acts as a crucial link between the host and its environment, playing a vital role in digestion, metabolism, physiology, and fitness. Using 16S rRNA metabarcoding, we investigated the effect of altitude on the microbiome composition of Anatolian Blind Mole Rats (Nannospalax xanthodon) across six locations and three altitudinal groups. We also factored in the host diet, as well as host microsatellite genotypes and thyroid hormone levels. The altitude had a major effect on microbiome composition, with notable differences in the relative abundance of several bacterial taxa across elevations. Contrary to prior research, we found no significant difference in strictly anaerobic bacteria abundance among altitudinal groups, though facultatively anaerobic bacteria were more prevalent at higher altitudes. Microbiome alpha diversity peaked at mid-altitude, comprising elements from both low and high elevations. The beta diversity showed significant association with the altitude. Altitude had a significant effect on the diet composition but not on its alpha diversity. No distinct altitude-related genetic structure was evident among the host populations, and no correlation was revealed between the host genetic relatedness and microbiome composition nor between the host microbiome and the diet. Free thyroxine (FT4) levels increased almost linearly with the altitude but none of the bacterial ASVs were found to be specifically associated with hormone levels. Total thyroxine (TT4) levels correlated positively with microbiome diversity. Although we detected correlation between certain components of the thyroid hormone levels and the microbiome beta diversity, the pattern of their relationship remains inconclusive.Article Citation - WoS: 6Citation - Scopus: 5Basidiomycota Species in Drosophila Gut Are Associated With Host Fat Metabolism(Nature Research, 2023) Bozkurt, Berkay; Terlemez, Gamze; Sezgin, EfeThe importance of bacterial microbiota on host metabolism and obesity risk is well documented. However, the role of fungal microbiota on host storage metabolite pools is largely unexplored. We aimed to investigate the role of microbiota on D. melanogaster fat metabolism, and examine interrelatedness between fungal and bacterial microbiota, and major metabolic pools. Fungal and bacterial microbiota profiles, fat, glycogen, and trehalose metabolic pools are measured in a context of genetic variation represented by whole genome sequenced inbred Drosophila Genetic Reference Panel (DGRP) samples. Increasing Basidiomycota, Acetobacter persici, Acetobacter pomorum, and Lactobacillus brevis levels correlated with decreasing triglyceride levels. Host genes and biological pathways, identified via genome-wide scans, associated with Basidiomycota and triglyceride levels were different suggesting the effect of Basidiomycota on fat metabolism is independent of host biological pathways that control fungal microbiota or host fat metabolism. Although triglyceride, glycogen and trehalose levels were highly correlated, microorganisms’ effect on triglyceride pool were independent of glycogen and trehalose levels. Multivariate analyses suggested positive interactions between Basidiomycota, A. persici, and L. brevis that collectively correlated negatively with fat and glycogen pools. In conclusion, fungal microbiota can be a major player in host fat metabolism. Interactions between fungal and bacterial microbiota may exert substantial control over host storage metabolite pools and influence obesity risk. © 2023, Springer Nature Limited.Editorial Citation - WoS: 2Citation - Scopus: 2Editorial: Population Genomics and Adaptation To Novel Environments: Challenges and Opportunities(Frontiers Media S.A., 2023) Matur, Ferhat; Keskin, Emre; Sezgin, EfeUnderstanding how organisms adapt to novel environments is an active Research Topic in ecological and evolutionary studies. Most ecological and evolutionary studies focus on how organisms find food (utilization of ecological resources), how they avoid being the food (avoidance of predators), or form the next generation (reproductive strategies) in changing environmental conditions. Yet, some novel environments may present with extreme challenges that organisms may need to evolve novel metabolic pathways even just to exist. Population genomics methods can offer reliable estimates of basic population characteristics such as effective population size, inbreeding, demographic history, and population structure, all of which are also important for conservation efforts. Furthermore, population genomics studies can pinpoint specific genetic loci and variants that are under selection for a populations’ ability to evolve and adapt in response to environmental change and manage adaptive variation. The last 10 years have seen a rise in the study of population genetics of non-model organisms, and the findings of this research are increasingly being applied to the conservation and management of wildlife. To understand population genetics and adaptations, it is equally crucial to share and disseminate the research done using these techniques.Erratum Correction To: Excessive Replacement Changes Drive Evolution of Global Sheep Prion Protein (prnp) Sequences (heredity, (2022), 128, 5, (377-385), 10.1038/S41437-022-00520-6)(Springer, 2023) Teferedegn, Eden Yitna; Yaman, Yalçın; Sezgin, Efe; Ün, CemalIn this article the affiliation details for Author Cemal Ün were incorrectly given as Armauer Hansen research institute, Biotechnology and Bioinformatic Directorate, Addis Ababa, Ethiopia but should have been Department of Biology, Molecular Biology Division, Ege University, Izmir, Turkey. The original article has been corrected. © 2022, The Author(s), under exclusive licence to The Genetics Society.Article Citation - WoS: 30Citation - Scopus: 33Targeting the Panoptosome With 3,4-Methylenedioxy Reduces Panoptosis and Protects the Kidney Against Renal Ischemia-Reperfusion Injury(Taylor & Francis, 2022) Uysal, Erdal; Dokur, Mehmet; Küçükdurmaz, Faruk; Altınay, Serdar; Polat, Sait; Batçıoğlu, Kadir; Sezgin, EfeObjectıves: The objectives of this study were a) to investigate the effect of targeting the PANoptosome with 3,4-methylenedioxy-β-nitrostyrene (MNS) on PANoptosis in the Renal ischemia-reperfussion (RIR) model b) to investigate the kidney protective effect of MNS toward RIR injury. Methods: Thirty-two rats were divided into four groups randomly. The groups were assigned as Control, Sham, DMSO (dimethyl sulfoxide) and MNS groups. The rats in the MNS group were intraperitoneally given 20 mg/kg of MNS 30 minutes before reperfusion. 2% DMSO solvent that dissolves MNS were given to the rats in DMSO group. Left nephrectomy was performed on the rats under anesthesia at the 6th hour after reperfusion. Glutathione peroxidase (GPx), malondialdehyde (MDA), catalase (CAT), superoxide dismutase (SOD) and 8-Okso-2′-deoksiguanozin (8-OHdG) levels were measured. Immunohistochemical analysis, electron microscopic and histological examinations were carried out in the tissues. Results: Total tubular injury score was lower in the MNS group (p < 0.001). Caspase-3, Gasdermin D and MLK (Mixed Lineage Kinase Domain Like Pseudokinase) expressions were considerably decreased in the MNS group (p < 0.001). Apoptotic index (AI) was found to be low in the MNS group (p < 0.001). CAT and SOD levels were higher in the MNS Group (p = 0.006, p = 0.0004, respectively). GPx, MDA, and 8-OH-dG levels were similar (p > 0.05) in all groups. MNS considerably improved the tissue structure, based on the electron microscopic analysis. Conclusıons: Our results suggested that MNS administrated before the reperfusion reduces pyroptosis, apoptosis and necroptosis. These findings suggest that MNS significantly protects the kidney against RIR injury by reducing PANoptosis as a result of specific inhibition of Nod-like receptor pyrin domain-containing 3 (NLRP 3), one of the PANoptosome proteins.Article Citation - WoS: 6Citation - Scopus: 5Excessive Replacement Changes Drive Evolution of Global Sheep Prion Protein (prnp) Sequences(Springer, 2022) Sezgin, Efe; Teferedegn, Eden Yitna; Ün, Cemal; Yaman, YalçınSheep prion protein (PRNP) is the major host genetic factor responsible for susceptibility to scrapie. We aimed to understand the evolutionary history of sheep PRNP, and primarily focused on breeds from Turkey and Ethiopia, representing genome-wise ancient sheep populations. Population molecular genetic analyses are extended to European, South Asian, and East Asian populations, and for the first time to scrapie associated haplotypes. 1178 PRNP coding region nucleotide sequences were analyzed. High levels of nucleotide diversity driven by extensive low-frequency replacement changes are observed in all populations. Interspecific analyses were conducted using mouflon and domestic goat as outgroup species. Despite an abundance of silent and replacement changes, lack of silent or replacement fixations was observed. All scrapie-associated haplotype analyses from all populations also showed extensive low-frequency replacement changes. Neutrality tests did not indicate positive (directional), balancing or strong negative selection or population contraction for any of the haplotypes in any population. A simple negative selection history driven by prion disease susceptibility is not supported by the population and haplotype based analyses. Molecular function, biological process enrichment, and protein-protein interaction analyses suggested functioning of PRNP protein in multiple pathways, and possible other functional constraint selections. In conclusion, a complex selection history favoring excessive replacement changes together with weak purifying selection possibly driven by frequency-dependent selection is driving PRNP sequence evolution. Our results is not unique only to the Turkish and Ethiopian samples, but can be generalized to global sheep populations.Conference Object Does Locoregional Treatment in De Novo Stage Iv Bone-Only Metastatic Breast Cancer Prolong Survival? an Ongoing Multicenter Registry Study(Elsevier, 2019) Soran, Atilla; Işık, Arda; Doğan, Lütfi; Sezgin, Efe; Özbaş, SerdarSurgical treatment of primary tumor is a controversial treatment of stage IV de novo metastatic breast cancer (BC). This study aims to present early results of the ongoing reg istry in a cohort of patients.Article Citation - WoS: 5Citation - Scopus: 3Apol1 Variant Alleles Associate With Reduced Risk for Opportunistic Infections in Hiv Infection(Nature Research, 2021) An, Ping; Sezgin, Efe; Kirk, Gregory D.; Duggal, Priya; Binns-Roemer, Elizabeth; Nelson, George; Limou, SophieApolipoprotein L1 (APOL1), an innate immune factor against African trypanosoma brucei, inhibits HIV-1 in vitro. The impact of APOL1 G1-G2 variants on HIV-1-associated opportunistic infections (OIs) is unknown. Here, we report findings from a metaanalysis of four HIV/AIDS prospective cohorts (ALIVE, LSOCA, MACS, and WIHS) including 2066 African American participants. Using a global test combining all four cohorts, carriage of two APOL1 variant alleles is associated with a 50% reduction in odds of OI (combined OR 0.50, 95% CI 0.33-0.76). Subgroup analysis of OI etiological categories (viral, parasitic, fungal and Mycobacterial) suggests the possibility of specific protection from fungal infections (OR 0.54. 95% CI 0.32-0.93; P-Bonferroni corrected=0.08). We observe an association of APOL1 variant alleles with host protection against OI in HIV-positive individuals. The study suggests a broader role of APOL1 variant alleles in innate immunity in vivo. An et al. determine the presence of variants of the innate immune factor APOL1 in four cohorts of HIV-positive patients. The study suggests that APOL1 might confer carriers of two variant alleles protection from HIV related opportunistic infections, especially fungal infections.