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Onal G, Yalçın-Çakmaklı G, Özçelik CE, Boussaad I, Şeker UÖŞ, Fernandes HJR, Demir H, Krüger R, Elibol B, Dökmeci S, Salman MM. Variant-specific effects of GBA1 mutations on dopaminergic neuron proteostasis. J Neurochem 2024. [PMID: 38641924 DOI: 10.1111/jnc.16114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 03/26/2024] [Accepted: 04/05/2024] [Indexed: 04/21/2024]
Abstract
Glucocerebrosidase 1 (GBA1) mutations are the most important genetic risk factors for Parkinson's disease (PD). Clinically, mild (e.g., p.N370S) and severe (e.g., p.L444P and p.D409H) GBA1 mutations have different PD phenotypes, with differences in age at disease onset, progression, and the severity of motor and non-motor symptoms. We hypothesize that GBA1 mutations cause the accumulation of α-synuclein by affecting the cross-talk between cellular protein degradation mechanisms, leading to neurodegeneration. Accordingly, we tested whether mild and severe GBA1 mutations differentially affect the degradation of α-synuclein via the ubiquitin-proteasome system (UPS), chaperone-mediated autophagy (CMA), and macroautophagy and differentially cause accumulation and/or release of α-synuclein. Our results demonstrate that endoplasmic reticulum (ER) stress and total ubiquitination rates were significantly increased in cells with severe GBA1 mutations. CMA was found to be defective in induced pluripotent stem cell (iPSC)-derived dopaminergic neurons with mild GBA1 mutations, but not in those with severe GBA1 mutations. When examining macroautophagy, we observed reduced formation of autophagosomes in cells with the N370S and D409H GBA1 mutations and impairments in autophagosome-lysosome fusion in cells with the L444P GBA1 mutation. Accordingly, severe GBA1 mutations were found to trigger the accumulation and release of oligomeric α-synuclein in iPSC-derived dopaminergic neurons, primarily as a result of increased ER stress and defective macroautophagy, while mild GBA1 mutations affected CMA, which is mainly responsible for the degradation of the monomeric form of α-synuclein. Overall, our findings provide new insight into the molecular basis of the clinical variability in PD associated with different GBA1 mutations.
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Affiliation(s)
- G Onal
- Department of Physiology, Anatomy and Genetics, Kavli Institute for NanoScience Discovery, University of Oxford, Oxford, UK
- Oxford Parkinson's Disease Centre, University of Oxford, Oxford, UK
| | - G Yalçın-Çakmaklı
- Department of Neurology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - C E Özçelik
- National Nanotechnology Research Center, UNAM-Institute of Materials Science and Nanotechnology, Bilkent University, Ankara, Turkey
| | - I Boussaad
- Translational Neuroscience, Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - U Ö Ş Şeker
- Interdisciplinary Neuroscience Program, National Nanotechnology Research Center, UNAM-Institute of Materials Science and Nanotechnology, Bilkent University, Ankara, Turkey
| | - Hugo J R Fernandes
- Department of Physiology, Anatomy and Genetics, Kavli Institute for NanoScience Discovery, University of Oxford, Oxford, UK
- Oxford Parkinson's Disease Centre, University of Oxford, Oxford, UK
| | - H Demir
- Department of Pediatric Gastroenterology, Hepatology and Nutrition, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - R Krüger
- Translational Neuroscience, Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, Esch-sur-Alzette, Luxembourg
- Transversal Translational Medicine, Luxembourg Institute of Health (LIH), Strassen, Luxembourg
- Parkinson Research Clinic, Centre Hospitalier de Luxembourg (CHL), Luxembourg City, Luxembourg
| | - B Elibol
- Department of Neurology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - S Dökmeci
- Department of Medical Biology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - M M Salman
- Department of Physiology, Anatomy and Genetics, Kavli Institute for NanoScience Discovery, University of Oxford, Oxford, UK
- Oxford Parkinson's Disease Centre, University of Oxford, Oxford, UK
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Çam SB, Çiftci E, Gürbüz N, Altun B, Korkusuz P. Allogeneic bone marrow mesenchymal stem cell-derived exosomes alleviate human hypoxic AKI-on-a-Chip within a tight treatment window. Stem Cell Res Ther 2024; 15:105. [PMID: 38600585 PMCID: PMC11005291 DOI: 10.1186/s13287-024-03674-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Accepted: 02/20/2024] [Indexed: 04/12/2024] Open
Abstract
BACKGROUND Acute hypoxic proximal tubule (PT) injury and subsequent maladaptive repair present high mortality and increased risk of acute kidney injury (AKI) - chronic kidney disease (CKD) transition. Human bone marrow mesenchymal stem cell-derived exosomes (hBMMSC-Exos) as potential cell therapeutics can be translated into clinics if drawbacks on safety and efficacy are clarified. Here, we determined the real-time effective dose and treatment window of allogeneic hBMMSC-Exos, evaluated their performance on the structural and functional integrity of 3D microfluidic acute hypoxic PT injury platform. METHODS hBMMSC-Exos were isolated and characterized. Real-time impedance-based cell proliferation analysis (RTCA) determined the effective dose and treatment window for acute hypoxic PT injury. A 2-lane 3D gravity-driven microfluidic platform was set to mimic PT in vitro. ZO-1, acetylated α-tubulin immunolabelling, and permeability index assessed structural; cell proliferation by WST-1 measured functional integrity of PT. RESULTS hBMMSC-Exos induced PT proliferation with ED50 of 172,582 µg/ml at the 26th hour. Hypoxia significantly decreased ZO-1, increased permeability index, and decreased cell proliferation rate on 24-48 h in the microfluidic platform. hBMMSC-Exos reinforced polarity by a 1.72-fold increase in ZO-1, restored permeability by 20/45-fold against 20/155 kDa dextran and increased epithelial proliferation 3-fold compared to control. CONCLUSIONS The real-time potency assay and 3D gravity-driven microfluidic acute hypoxic PT injury platform precisely demonstrated the therapeutic performance window of allogeneic hBMMSC-Exos on ischemic AKI based on structural and functional cellular data. The novel standardized, non-invasive two-step system validates the cell-based personalized theragnostic tool in a real-time physiological microenvironment prior to safe and efficient clinical usage in nephrology.
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Affiliation(s)
- Sefa Burak Çam
- Faculty of Medicine, Dept. of Histology and Embryology, Hacettepe University, Ankara, Ankara, 06230, Turkey
| | - Eda Çiftci
- Graduate School of Science and Engineering, Department of Bioengineering, Hacettepe University, Ankara, 06230, Turkey
| | - Nazlıhan Gürbüz
- Graduate School of Science and Engineering, Department of Bioengineering, Hacettepe University, Ankara, 06230, Turkey
| | - Bülent Altun
- Faculty of Medicine, Dept. of Nephrology, Hacettepe University, Ankara, 06230, Turkey
| | - Petek Korkusuz
- Faculty of Medicine, Dept. of Histology and Embryology, Hacettepe University, Ankara, Ankara, 06230, Turkey.
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Şengül SN, Ozturk S, Ulubayram K, Pekel Bayramgil N, Kucukkaya Eren S. Effect of final irrigation protocols with chitosan nanoparticle and genipin on dentine against collagenase degradation: An ex-vivo study. Int Endod J 2024; 57:477-489. [PMID: 38240378 DOI: 10.1111/iej.14027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 12/03/2023] [Accepted: 01/10/2024] [Indexed: 03/07/2024]
Abstract
AIM Endodontic irrigants may affect the mechanical and chemical properties of dentine. This study evaluated the effects of various final irrigation protocols including the use of chitosan nanoparticle (CSnp) and cross-linking with genipin on the (1) mechanical and (2) chemical properties of dentine against enzymatic degradation. METHODOLOGY CSnp was synthesized and characterized considering physiochemical parameters and stability. The root canals of 90 single-rooted teeth were prepared and irrigated with NaOCl. Dentine discs were obtained and divided into groups according to the following irrigation protocols: Group NaOCl+EDTA, Group NaOCl+CSnp, Group NaOCl+EDTA+CSnp, Group NaOCl+CSnp+Genipin, Group NaOCl+EDTA+CSnp+Genipin and Group distilled water. (1) Mechanical changes were determined by microhardness analysis using Vickers-tester. (2) Chemical changes were determined by evaluating molecular and elemental compositions of dentine using Fourier transform infrared spectroscopy (FTIR) analysis and scanning electron microscope (SEM)/energy dispersive X-ray spectroscopy (EDS) analysis, respectively. All analyses were repeated after the discs were kept in collagenase for 24 h. Data were analysed with repeated measures analysis of variance and Bonferroni correction for microhardness analysis, and Kruskal-Wallis and Wilcoxon tests for FTIR and SEM/EDS analyses (p = .05). RESULTS (1) Collagenase application did not have a negative effect on microhardness only in Group NaOCl+EDTA+CSnp+Genipin when compared with the post-irrigation values (p > .05). Post-collagenase microhardness of Group NaOCl+EDTA+CSnp and Group NaOCl+CSnp+Genipin was similar to the initial microhardness (p > .05). (2) After collagenase, Amide III/PO 4 3 - ratio presented no change in Group NaOCl+EDTA+CSnp, Group NaOCl+CSnp+Genipin and Group NaOCl+EDTA+CSnp+Genipin (p > .05), while decreased in other groups (p < .05). Collagenase did not affectCO 3 2 - /PO 4 3 - ratio in the groups (p > .05). There were no changes in the groups in terms of elemental level before and after collagenase application (p > .05). CONCLUSIONS CSnp and genipin positively affected the microhardness and molecular composition of dentine. This effect was more pronounced when CSnp was used after EDTA.
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Affiliation(s)
- S N Şengül
- Department of Endodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey
| | - S Ozturk
- Department of Basic Pharmaceutical Sciences, Faculty of Pharmacy, Hacettepe University, Ankara, Turkey
| | - K Ulubayram
- Department of Basic Pharmaceutical Sciences, Faculty of Pharmacy, Hacettepe University, Ankara, Turkey
| | - N Pekel Bayramgil
- Department of Chemistry, Faculty of Science, Hacettepe University, Ankara, Turkey
| | - S Kucukkaya Eren
- Department of Endodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey
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Kuru D, Aktitiz S, Atakan MM, Köse MG, Turnagöl HH, Koşar ŞN. Effect of Pre-exercise Sodium Citrate Ingestion on Repeated Sprint Performance in Soccer Players. J Strength Cond Res 2024; 38:556-562. [PMID: 38241467 DOI: 10.1519/jsc.0000000000004651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2024]
Abstract
ABSTRACT Kuru, D, Aktitiz, S, Atakan, MM, Köse, MG, Turnagöl, HH, and Koşar, ŞN. Effect of pre-exercise sodium citrate ingestion on repeated sprint performance in soccer players. J Strength Cond Res 38(3): 556-562, 2024-This study aimed to test the hypothesis that sodium citrate (CIT) administered 180 minutes before exercise improves repeated sprint performance in athletes within a field-based setting. Twenty male soccer players (mean ± SD : age = 20.9 ± 2.3 years; body mass [BM] = 73.8 ± 5.9 kg) performed a running-based anaerobic sprint test (RAST) with 0.5 g·kg -1 BM of CIT or with placebo (PLC; NaCl) ingestion 180 minutes before exercise in a randomized, crossover, and double-blind design, with at least 6 days between the trials. Blood samples were collected before exercise and at first, third, fifth, and seventh minutes after exercise to analyze blood pH, bicarbonate, and lactate levels. Gastrointestinal symptoms were also monitored at 30-minute intervals for 180 minutes after CIT and PLC ingestion. Pre-exercise blood pH (CIT = 7.49 ± 0.03 vs. PLC = 7.41 ± 0.02) and bicarbonate (CIT = 30.57 ± 1.33 vs. PLC = 25.25 ± 1.52) increased with CIT compared with PLC ( p < 0.001). Blood pH, bicarbonate, and lactate at the first, third, fifth, and seventh minutes after RAST with CIT were higher than PLC ( p < 0.05), except for lactate at first minute ( p > 0.05). Compared with PLC, CIT ingestion significantly improved minimum power output ( p = 0.024) and percentage decrement score ( p = 0.023). Gastrointestinal symptoms were significantly higher after CIT ingestion vs. PLC at 30th ( p = 0.003) and 60th minutes ( p = 0.010). However, there were no significant differences at 90th, 120th, 150th, or 180th minutes ( p > 0.05). The ingestion of 0.5 g·kg -1 BM of CIT 180 minutes before exercise is an effective ergogenic aid for improving repeated sprint ability as evidenced by improvements in minimum power output and percentage decrement score.
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Affiliation(s)
- Dilara Kuru
- Division of Exercise Nutrition and Metabolism, Faculty of Sport Sciences, Hacettepe University, Ankara, Turkey; and
| | - Selin Aktitiz
- Division of Exercise Nutrition and Metabolism, Faculty of Sport Sciences, Hacettepe University, Ankara, Turkey; and
| | - Muhammed M Atakan
- Division of Exercise Nutrition and Metabolism, Faculty of Sport Sciences, Hacettepe University, Ankara, Turkey; and
| | - Mehmet G Köse
- Division of Movement and Training Sciences, Faculty of Sport Sciences, Hacettepe University, Ankara, Turkey
| | - Hüseyin H Turnagöl
- Division of Exercise Nutrition and Metabolism, Faculty of Sport Sciences, Hacettepe University, Ankara, Turkey; and
| | - Şükran N Koşar
- Division of Exercise Nutrition and Metabolism, Faculty of Sport Sciences, Hacettepe University, Ankara, Turkey; and
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Yüzbaşıoğlu Y, Hazar M, Aydın Dilsiz S, Yücel C, Bulut M, Cetinkaya S, Erdem O, Basaran N. Biomonitoring of Oxidative-Stress-Related Genotoxic Damage in Patients with End-Stage Renal Disease. Toxics 2024; 12:69. [PMID: 38251024 PMCID: PMC10819997 DOI: 10.3390/toxics12010069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 12/27/2023] [Accepted: 01/12/2024] [Indexed: 01/23/2024]
Abstract
Chronic kidney disease (CKD), a common progressive renal failure characterized by the permanent loss of functional nephrons can rapidly progress to end-stage renal disease, which is known to be an irreversible renal failure. In the therapy of ESRD, there are controversial suggestions about the use of regular dialysis, since it is claimed to increase oxidative stress, which may increase mortality in patients. In ESRD, oxidative-stress-related DNA damage is expected to occur, along with increased inflammation. Many factors, including heavy metals, have been suggested to exacerbate the damage in kidneys; therefore, it is important to reveal the relationship between these factors in ESRD patients. There are very few studies showing the role of oxidative-stress-related genotoxic events in the progression of ESRD patients. Within the scope of this study, genotoxic damage was evaluated using the comet assay and 8-OHdG measurement in patients with ESRD who were undergoing hemodialysis. The biochemical changes, the levels of heavy metals (aluminum, arsenic, cadmium, lead, and mercury) in the blood, and the oxidative biomarkers, including superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), and malondialdehyde (MDA) levels were evaluated, and their relationship with genotoxic damages was revealed. Genotoxicity, oxidative stress, and heavy-metal levels, except mercury, increased significantly in all renal patients. DNA damage, 8OHdG, and MDA significantly increased, and GSH significantly decreased in patients undergoing dialysis, compared with those not having dialysis. The duration and the severity of disease was positively correlated with increased aluminum levels and moderate positively correlated with increased DNA damage and cadmium levels. In conclusion, this study revealed that the oxidative-stress-related DNA damage, and also the levels of Al and Cd, increased in ESRD patients. It is assumed that these changes may play an important role in the progression of renal damage. Approaches for reducing oxidative-stress-related DNA damage and heavy-metal load in ESRD patients are recommended.
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Affiliation(s)
- Yücel Yüzbaşıoğlu
- Department of Emergency Medicine, Ankara Gülhane Training and Research Hospital, Health Sciences University, Ankara 06018, Türkiye
| | - Merve Hazar
- Department of Pharmaceutical Toxicology, Faculty of Pharmacy, Ağrı İbrahim Cecen University, Ağrı 04100, Türkiye;
| | - Sevtap Aydın Dilsiz
- Department of Pharmaceutical Toxicology, Faculty of Pharmacy, Hacettepe University, Ankara 06100, Türkiye;
| | - Ciğdem Yücel
- Department of Clinical Biochemistry, Ankara Gülhane Training and Research Hospital, Health Sciences University, Ankara 06018, Türkiye;
| | - Mesudiye Bulut
- Department of Nephrology, Ankara Gülhane Training and Research Hospital, Health Sciences University, Ankara 06018, Türkiye;
| | - Serdar Cetinkaya
- Department of Pharmaceutical Toxicology, Gülhane Faculty of Pharmacy, Health Sciences University, Ankara 06018, Türkiye; (S.C.); (O.E.)
| | - Onur Erdem
- Department of Pharmaceutical Toxicology, Gülhane Faculty of Pharmacy, Health Sciences University, Ankara 06018, Türkiye; (S.C.); (O.E.)
| | - Nursen Basaran
- Department of Pharmaceutical Toxicology, Faculty of Pharmacy, Başkent University, Ankara 06790, Türkiye;
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Kaya Z, Belder N, Sever-Bahcekapili M, Donmez-Demir B, Erdener ŞE, Bozbeyoglu N, Bagci C, Eren-Kocak E, Yemisci M, Karatas H, Erdemli E, Gursel I, Dalkara T. Vesicular HMGB1 release from neurons stressed with spreading depolarization enables confined inflammatory signaling to astrocytes. J Neuroinflammation 2023; 20:295. [PMID: 38082296 PMCID: PMC10712196 DOI: 10.1186/s12974-023-02977-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 11/28/2023] [Indexed: 12/18/2023] Open
Abstract
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. We triggered a single cortical spreading depolarization by optogenetic stimulation or pinprick in naïve Swiss albino or transgenic Thy1-ChR2-YFP and hGFAP-GFP adult mice. We evaluated HMGB1 release in brain tissue sections prepared from these mice by immunofluorescent labeling and immunoelectron microscopy. EzColocalization and Costes thresholding algorithms were used to assess the colocalization of small extracellular vesicles (sEVs) carrying HMGB1 with astrocyte or microglia processes. sEVs were also isolated from the brain after CSD, and neuron-derived sEVs were captured by CD171 (L1CAM). sEVs were characterized with flow cytometry, scanning electron microscopy, nanoparticle tracking analysis, and Western blotting. We found that HMGB1 is released mainly within sEVs from the soma of stressed neurons, which are taken up by surrounding astrocyte processes. This creates conditions for selective communication between neurons and astrocytes bypassing microglia, as evidenced by activation of the proinflammatory transcription factor NF-ĸB p65 in astrocytes but not in microglia. Transmission immunoelectron microscopy data illustrated that HMGB1 was incorporated into sEVs through endosomal mechanisms. In conclusion, proinflammatory mediators released within sEVs can induce cell-specific inflammatory signaling in the brain without activating transmembrane receptors on other cells and causing overt inflammation.
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Affiliation(s)
- Zeynep Kaya
- Institute of Neurological Sciences and Psychiatry, Hacettepe University, Sıhhiye, Ankara, Turkey
| | - Nevin Belder
- Institute of Neurological Sciences and Psychiatry, Hacettepe University, Sıhhiye, Ankara, Turkey
- Biotechnology Institute, Ankara University, Ankara, Turkey
| | - Melike Sever-Bahcekapili
- Institute of Neurological Sciences and Psychiatry, Hacettepe University, Sıhhiye, Ankara, Turkey
| | - Buket Donmez-Demir
- Institute of Neurological Sciences and Psychiatry, Hacettepe University, Sıhhiye, Ankara, Turkey
| | - Şefik Evren Erdener
- Institute of Neurological Sciences and Psychiatry, Hacettepe University, Sıhhiye, Ankara, Turkey
| | - Naz Bozbeyoglu
- Department of Molecular Biology and Genetics, Science Faculty, Bilkent University, Ankara, Turkey
| | - Canan Bagci
- Institute of Neurological Sciences and Psychiatry, Hacettepe University, Sıhhiye, Ankara, Turkey
- Department of Biomedical Engineering, Faculty of Engineering and Natural Sciences, Bahçeşehir University, Istanbul, Turkey
| | - Emine Eren-Kocak
- Institute of Neurological Sciences and Psychiatry, Hacettepe University, Sıhhiye, Ankara, Turkey
| | - Muge Yemisci
- Institute of Neurological Sciences and Psychiatry, Hacettepe University, Sıhhiye, Ankara, Turkey
| | - Hulya Karatas
- Institute of Neurological Sciences and Psychiatry, Hacettepe University, Sıhhiye, Ankara, Turkey
| | - Esra Erdemli
- Department of Histology and Embryology, Faculty of Medicine, Ankara University, Ankara, Turkey
| | - Ihsan Gursel
- Department of Molecular Biology and Genetics, Science Faculty, Bilkent University, Ankara, Turkey
- Izmir Biomedicine and Genome Center, Dokuz Eylul University, İzmir, Turkey
| | - Turgay Dalkara
- Institute of Neurological Sciences and Psychiatry, Hacettepe University, Sıhhiye, Ankara, Turkey.
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Özdemir C, Muratoğlu B, Özel BN, Alpdündar-Bulut E, Tonyalı G, Ünal Ş, Uçkan-Çetinkaya D. Multiparametric analysis of etoposide exposed mesenchymal stem cells and Fanconi anemia cells: implications in development of secondary myeloid malignancy. Clin Exp Med 2023; 23:4511-4524. [PMID: 37179284 DOI: 10.1007/s10238-023-01087-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2023] [Accepted: 05/02/2023] [Indexed: 05/15/2023]
Abstract
Secondary acute myeloid leukemia (sAML) may develop following a prior therapy or may evolve from an antecedent hematological disorder such as Fanconi Anemia (FA). Pathophysiology of leukemic evolution is not clear. Etoposide (Eto) is a chemotherapeutic agent implicated in development of sAML. FA is an inherited bone marrow (BM) failure disease characterized by genomic instability and xenobiotic susceptibility. Here, we hypothesized that alterations in the BM niche may play a critical/driver role in development of sAML in both conditions. Expression of selected genes involved in xenobiotic metabolism, DNA double-strand break response, endoplasmic reticulum (ER) stress, heat shock response and cell cycle regulation were determined in BM mesenchymal stem cells (MSCs) of healthy controls and FA patients at steady state and upon exposure to Eto at different concentrations and in recurrent doses. Expression of CYPA1, p53, CCNB1, Dicer1, CXCL12, FLT3L and TGF-Beta genes were significantly downregulated in FA-MSCs compared with healthy controls. Eto exposure induced significant alterations in healthy BM-MSCs with increased expression of CYP1A1, GAD34, ATF4, NUPR1, CXCL12, KLF4, CCNB1 and nuclear localization of Dicer1. Interestingly, FA-MSCs did not show significant alterations in these genes upon Eto exposure. As opposed to healthy MSCs DICER1 gene expression and intracellular localization was not altered on FA BM-MSCs after Eto treatment. These results showed that Eto is a highly potent molecule and has pleiotropic effects on BM-MSCs, FA cells show altered expression profile compared to healthy controls and Eto exposure on FA cells shows differential profile than healthy controls.
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Affiliation(s)
- Cansu Özdemir
- Center for Stem Cell Research and Development (PEDI-STEM), Hacettepe University, 06100 Gevher Nesibe Street, Sihhiye, Altındağ, Ankara, Turkey.
| | - Bihter Muratoğlu
- Center for Stem Cell Research and Development (PEDI-STEM), Hacettepe University, 06100 Gevher Nesibe Street, Sihhiye, Altındağ, Ankara, Turkey
- Department of Stem Cell Sciences, Hacettepe University Graduate School of Health Sciences, 06100 Gevher Nesibe Street, Sihhiye, Altındağ, Ankara, Turkey
| | - Buse Nurten Özel
- Center for Stem Cell Research and Development (PEDI-STEM), Hacettepe University, 06100 Gevher Nesibe Street, Sihhiye, Altındağ, Ankara, Turkey
- Institute for Genomic Medicine, Columbia University, New York, NY, USA
| | - Esin Alpdündar-Bulut
- Center for Stem Cell Research and Development (PEDI-STEM), Hacettepe University, 06100 Gevher Nesibe Street, Sihhiye, Altındağ, Ankara, Turkey
- Division of Hematology-Oncology, Faculty of Medicine, Department of Pediatrics, Hacettepe University, 06100 Gevher Nesibe Street, Sihhiye, Altındağ, Ankara, Turkey
| | - Gülsena Tonyalı
- Center for Stem Cell Research and Development (PEDI-STEM), Hacettepe University, 06100 Gevher Nesibe Street, Sihhiye, Altındağ, Ankara, Turkey
- Department of Stem Cell Sciences, Hacettepe University Graduate School of Health Sciences, 06100 Gevher Nesibe Street, Sihhiye, Altındağ, Ankara, Turkey
| | - Şule Ünal
- Division of Hematology-Oncology, Faculty of Medicine, Department of Pediatrics, Hacettepe University, 06100 Gevher Nesibe Street, Sihhiye, Altındağ, Ankara, Turkey
- Research Center for Fanconi Anemia and Other IBMFSs, Hacettepe University, 06100 Gevher Nesibe Street, Sihhiye, Altındağ, Ankara, Turkey
| | - Duygu Uçkan-Çetinkaya
- Center for Stem Cell Research and Development (PEDI-STEM), Hacettepe University, 06100 Gevher Nesibe Street, Sihhiye, Altındağ, Ankara, Turkey.
- Department of Stem Cell Sciences, Hacettepe University Graduate School of Health Sciences, 06100 Gevher Nesibe Street, Sihhiye, Altındağ, Ankara, Turkey.
- Division of Hematology-Oncology, Faculty of Medicine, Department of Pediatrics, Hacettepe University, 06100 Gevher Nesibe Street, Sihhiye, Altındağ, Ankara, Turkey.
- Research Center for Fanconi Anemia and Other IBMFSs, Hacettepe University, 06100 Gevher Nesibe Street, Sihhiye, Altındağ, Ankara, Turkey.
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Akbaba TH, Ekici M, Çolpak Aİ, Brown KL, Karadağ Ö, Balci-Peynircioglu B. Behçet's syndrome: recent advances to aid diagnosis. Clin Exp Med 2023; 23:4079-4090. [PMID: 37897656 DOI: 10.1007/s10238-023-01226-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Accepted: 10/17/2023] [Indexed: 10/30/2023]
Abstract
Behçet's syndrome is a recurring inflammatory multiorgan disorder affecting the skin, mucosa, eyes, joints, stomach, and central nervous system. Behçet's syndrome epidemiology varies greatly among populations (0.64-420/100,000), and Behçet's syndrome has gained increasing international acclaim in the recent 50 years due to raising awareness of the syndrome, although it is rare in most population. In addition to the unclear etiology of the syndrome, the diagnosis of Behçet's syndrome is complicated by a vague clinical presentation, phenotypic heterogeneity and/or incomplete representation, and the lack of any specific laboratory, radiographic, or histological findings. There exists a dire need to elucidate factors that contribute to disease pathogenesis and/or are associated with clinical features of Behçet's syndrome and the classification of different forms of the syndrome. The identification of such molecular, cellular, and/or clinical factors are crucial for timely diagnosis and efficacious management of Behçet's syndrome. We discuss recent advances in the clinical diagnosis of Behçet's syndrome and related contributions of genetics, epigenetics, microbiome, inflammasomes, and autoantibodies to the improved diagnosis, management, and understanding of Behçet's syndrome.
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Affiliation(s)
- Tayfun Hilmi Akbaba
- Department of Medical Biology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
- BC Children's Hospital Research Institute, Vancouver, Canada
- Division of Rheumatology, Department of Pediatrics, Faculty of Medicine, University of British Columbia, Vancouver, Canada
| | - Mustafa Ekici
- Division of Rheumatology, Department of Internal Medicine, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Ayşe İlksen Çolpak
- Department of Neurology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Kelly L Brown
- BC Children's Hospital Research Institute, Vancouver, Canada
- Division of Rheumatology, Department of Pediatrics, Faculty of Medicine, University of British Columbia, Vancouver, Canada
| | - Ömer Karadağ
- Division of Rheumatology, Department of Internal Medicine, Faculty of Medicine, Hacettepe University, Ankara, Turkey
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Tuncer B, Aktas G, Baris Guncu M, Deniz D, Muhtarogullari M, Al-Haj Husain N, Özcan M. Effects of Surface Treatments and Cement Type on Shear Bond Strength between Titanium Alloy and All-Ceramic Materials. Materials (Basel) 2023; 16:6240. [PMID: 37763518 PMCID: PMC10532757 DOI: 10.3390/ma16186240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 07/31/2023] [Accepted: 08/02/2023] [Indexed: 09/29/2023]
Abstract
This study aimed to evaluate the effects of surface treatments and resin cement on the adhesion of ceramic and ceramic-like materials to titanium. A total of 40 specimens (5 mm diameter) of each material (lithium disilicate glass ceramic (LDGC-IPS e.maxCAD), lithium silicate glass ceramic (LSGC-VITA Suprinity) and a polymer-infiltrated ceramic network (PICN-Vita Enamic)) were fabricated using CAD/CAM technologies. In total, 120 titanium (Ti) specimens were divided into 12 groups, and half of the titanium specimens were tribochemically coated using CoJet. The titanium and all-ceramic specimens were cemented using either Self-curing adhesive cement (SCAC-Panavia 21) or a Self-curing luting composite (SCLC-Multilink Hybrid Abutment). After 5000 cycles of thermal aging, the shear bond strength (SBS) test was conducted using a universal testing machine. The failure modes of the specimens were analyzed using stereomicroscopy, and additionally, the representative specimens were observed using Scanning Electron Microscopy. ANOVA was used for the statistical analysis (p < 0.05). The post-hoc Duncan test was used to determine significant differences between the groups. The mean SBS values (mean ± STD) ranged from 15 ± 2 MPa to 29 ± 6 MPa. Significantly higher SBS values were acquired when the titanium surface was tribochemically coated (p < 0.05). The SCLC showed higher SBS values compared to the SCAC. While the LDGC showed the highest SBS values, the PICN presented the lowest. The tribochemical coating on the cementation surfaces of the titanium increased the SBS values. The specimens cemented with the SCLC showed higher SBS values than those with the SCAC. Additionally, the SCLC cement revealed a more significant increase in SBS values when used with the LDGC. The material used for restoration has a high impact on SBS than those of the cement and surface conditioning.
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Affiliation(s)
| | - Guliz Aktas
- Department of Prosthodontics, Faculty of Dentistry, Hacettepe University, Ankara 06100, Turkey; (G.A.); (M.B.G.); (D.D.); (M.M.)
| | - Mustafa Baris Guncu
- Department of Prosthodontics, Faculty of Dentistry, Hacettepe University, Ankara 06100, Turkey; (G.A.); (M.B.G.); (D.D.); (M.M.)
| | - Diler Deniz
- Department of Prosthodontics, Faculty of Dentistry, Hacettepe University, Ankara 06100, Turkey; (G.A.); (M.B.G.); (D.D.); (M.M.)
| | - Mehmet Muhtarogullari
- Department of Prosthodontics, Faculty of Dentistry, Hacettepe University, Ankara 06100, Turkey; (G.A.); (M.B.G.); (D.D.); (M.M.)
| | - Nadin Al-Haj Husain
- Clinic of Chewing Function Disturbances and Dental Biomaterials, Center of Dental Medicine, University of Zurich, 8032 Zurich, Switzerland;
- Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, 3010 Bern, Switzerland
| | - Mutlu Özcan
- Clinic of Chewing Function Disturbances and Dental Biomaterials, Center of Dental Medicine, University of Zurich, 8032 Zurich, Switzerland;
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10
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Demirkol Canli S, Uner M, Kucukkaraduman B, Karaoglu DA, Isik A, Turhan N, Akyol A, Gomceli I, Gure AO. A Novel Gene List Identifies Tumors with a Stromal-Mesenchymal Phenotype and Worse Prognosis in Gastric Cancer. Cancers (Basel) 2023; 15:cancers15113035. [PMID: 37296997 DOI: 10.3390/cancers15113035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 04/24/2023] [Accepted: 05/05/2023] [Indexed: 06/12/2023] Open
Abstract
BACKGROUND Molecular biomarkers that predict disease progression can help identify tumor subtypes and shape treatment plans. In this study, we aimed to identify robust biomarkers of prognosis in gastric cancer based on transcriptomic data obtained from primary gastric tumors. METHODS Microarray, RNA sequencing, and single-cell RNA sequencing-based gene expression data from gastric tumors were obtained from public databases. Freshly frozen gastric tumors (n = 42) and matched FFPE (formalin-fixed, paraffin-embedded) (n = 40) tissues from a Turkish gastric cancer cohort were used for quantitative real-time PCR and immunohistochemistry-based assessments of gene expression, respectively. RESULTS A novel list of 20 prognostic genes was identified and used for the classification of gastric tumors into two major tumor subgroups with differential stromal gene expression ("Stromal-UP" (SU) and "Stromal-DOWN" (SD)). The SU group had a more mesenchymal profile with an enrichment of extracellular matrix-related gene sets and a poor prognosis compared to the SD group. Expression of the genes within the signature correlated with the expression of mesenchymal markers ex vivo. A higher stromal content in FFPE tissues was associated with shorter overall survival. CONCLUSIONS A stroma-rich, mesenchymal subgroup among gastric tumors identifies an unfavorable clinical outcome in all cohorts tested.
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Affiliation(s)
- Secil Demirkol Canli
- Molecular Pathology Application and Research Center, Hacettepe University, 06100 Ankara, Turkey
- Department of Molecular Biology and Genetics, Bilkent University, 06800 Ankara, Turkey
- Division of Tumor Pathology, Cancer Institute, Hacettepe University, 06100 Ankara, Turkey
| | - Meral Uner
- Department of Pathology, School of Medicine, Hacettepe University, 06100 Ankara, Turkey
| | - Baris Kucukkaraduman
- Department of Molecular Biology and Genetics, Bilkent University, 06800 Ankara, Turkey
| | | | - Aynur Isik
- Hacettepe University Transgenic Animal Technologies Research and Application Center, 06100 Ankara, Turkey
| | - Nesrin Turhan
- Ankara City Hospital, Department of Pathology, University of Health Sciences, 06018 Ankara, Turkey
| | - Aytekin Akyol
- Department of Pathology, School of Medicine, Hacettepe University, 06100 Ankara, Turkey
| | - Ismail Gomceli
- Faculty of Health Sciences, Antalya Bilim University, 07190 Antalya, Turkey
| | - Ali Osmay Gure
- Department of Medical Biology, Acibadem Mehmet Ali Aydinlar University, 34752 Istanbul, Turkey
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11
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Li-Zhulanov NS, Zaikova NP, Sari S, Gülmez D, Sabuncuoğlu S, Ozadali-Sari K, Arikan-Akdagli S, Nefedov AA, Rybalova TV, Volcho KP, Salakhutdinov NF. Rational Design of New Monoterpene-Containing Azoles and Their Antifungal Activity. Antibiotics (Basel) 2023; 12:antibiotics12050818. [PMID: 37237723 DOI: 10.3390/antibiotics12050818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 04/24/2023] [Accepted: 04/25/2023] [Indexed: 05/28/2023] Open
Abstract
Azole antifungals, including fluconazole, have long been the first-line antifungal agents in the fight against fungal infections. The emergence of drug-resistant strains and the associated increase in mortality from systemic mycoses has prompted the development of new agents based on azoles. We reported a synthesis of novel monoterpene-containing azoles with high antifungal activity and low cytotoxicity. These hybrids demonstrated broad-spectrum activity against all tested fungal strains, with excellent minimum inhibitory concentration (MIC) values against both fluconazole-susceptible and fluconazole-resistant strains of Candida spp. Compounds 10a and 10c with cuminyl and pinenyl fragments demonstrated up to 100 times lower MICs than fluconazole against clinical isolates. The results indicated that the monoterpene-containing azoles had much lower MICs against fluconazole-resistant clinical isolates of Candida parapsilosis than their phenyl-containing counterpart. In addition, the compounds did not exhibit cytotoxicity at active concentrations in the MTT assay, indicating potential for further development as antifungal agents.
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Affiliation(s)
- Nikolai S Li-Zhulanov
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, Lavrentiev Ave., 9, 630090 Novosibirsk, Russia
| | - Nadezhda P Zaikova
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, Lavrentiev Ave., 9, 630090 Novosibirsk, Russia
| | - Suat Sari
- Department of Pharmaceutical Chemistry, Hacettepe University Faculty of Pharmacy, Sihhiye, Ankara 06100, Turkey
| | - Dolunay Gülmez
- Department of Medical Microbiology, Hacettepe University Faculty of Medicine, Sihhiye, Ankara 06100, Turkey
| | - Suna Sabuncuoğlu
- Department of Pharmaceutical Toxicology, Hacettepe University Faculty of Pharmacy, Sihhiye, Ankara 06100, Turkey
| | - Keriman Ozadali-Sari
- Department of Pharmaceutical Chemistry, Hacettepe University Faculty of Pharmacy, Sihhiye, Ankara 06100, Turkey
| | - Sevtap Arikan-Akdagli
- Department of Medical Microbiology, Hacettepe University Faculty of Medicine, Sihhiye, Ankara 06100, Turkey
| | - Andrey A Nefedov
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, Lavrentiev Ave., 9, 630090 Novosibirsk, Russia
| | - Tatyana V Rybalova
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, Lavrentiev Ave., 9, 630090 Novosibirsk, Russia
| | - Konstantin P Volcho
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, Lavrentiev Ave., 9, 630090 Novosibirsk, Russia
| | - Nariman F Salakhutdinov
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, Lavrentiev Ave., 9, 630090 Novosibirsk, Russia
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12
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Özenver N, Güvenalp Z, Kuruüzüm-Uz A, Demirezer LÖ. Inhibitory potential on key enzymes relevant to type II diabetes mellitus and antioxidant properties of the various extracts and phytochemical constituents from Rumex acetosella L. J Food Biochem 2020; 44:e13415. [PMID: 32744345 DOI: 10.1111/jfbc.13415] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Revised: 07/06/2020] [Accepted: 07/11/2020] [Indexed: 12/23/2022]
Abstract
Type II diabetes mellitus is a common and costly disease worldwide, characterized by hyperglycemia. Alpha (α)-amylase and α-glucosidase are important targets in diabetes therapy. Inhibition of these enzymes may lessen hyperglycemia, preventing diabetic complications. Oxidative stress is another factor involved in the disease's etiology. In the present study, we investigated antidiabetic profiles of the various extracts and phytochemicals of Rumex acetosella. Since the plant has been traditionally used for the antidiabetic purposes. α-amylase and α-glucosidase inhibitory studies in addition to DPPH•, ABTS•+, NO 2 - radical scavenging, and phosphomolybdate antioxidant assays were performed to evaluate the antidiabetic property. Specifically, the ethanol and ethanol-water extracts remarkably inhibited α-glucosidase than that of acarbose, unlike their slight/no inhibition on α-amylase. Convincing α-glucosidase inhibitory and antioxidant potential of alcohol-including extracts verified the ethnobotanical use of R. acetosella as an antidiabetic agent. PRACTICAL APPLICATIONS: The incidence of Type II DM is rising globally. Reducing hyperglycemia holds great importance to prevent devastating outcomes of diabetic complications. Ethnobotanical use of natural sources for medical purposes provides a basis for their potential activity against various diseases. The introduction of herbal agents may lead to the development of new drug candidates with convincing activity. Rumex acetosella L. has been traditionally used for the antidiabetic purposes. The research pointed out various extracts and phytochemical constituents from R. acetosella may act as antihyperglycemic agents. Particularly, alcohol-including extracts of R. acetosella may be considered as promising alternatives in the prevention or treatment of type II DM. The study puts emphasis on the therapeutic value of the plants for antidiabetic medication.
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Affiliation(s)
- Nadire Özenver
- Faculty of Pharmacy, Department of Pharmacognosy, Hacettepe University, Ankara, Turkey
| | - Zühal Güvenalp
- Faculty of Pharmacy, Department of Pharmacognosy, Atatürk University, Erzurum, Turkey
| | - Ayşe Kuruüzüm-Uz
- Faculty of Pharmacy, Department of Pharmacognosy, Hacettepe University, Ankara, Turkey
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Balci-Hayta B, Talim B, Kale G, Dincer P. LARGE expression in different types of muscular dystrophies other than dystroglycanopathy. BMC Neurol 2018; 18:207. [PMID: 30553274 PMCID: PMC6295086 DOI: 10.1186/s12883-018-1207-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Accepted: 11/27/2018] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND Alpha-dystroglycan (αDG) is an extracellular peripheral glycoprotein that acts as a receptor for both extracellular matrix proteins containing laminin globular domains and certain arenaviruses. An important enzyme, known as Like-acetylglucosaminyltransferase (LARGE), has been shown to transfer repeating units of -glucuronic acid-β1,3-xylose-α1,3- (matriglycan) to αDG that is required for functional receptor as an extracellular matrix protein scaffold. The reduction in the amount of LARGE-dependent matriglycan result in heterogeneous forms of dystroglycanopathy that is associated with hypoglycosylation of αDG and a consequent lack of ligand-binding activity. Our aim was to investigate whether LARGE expression showed correlation with glycosylation of αDG and histopathological parameters in different types of muscular dystrophies, except for dystroglycanopathies. METHODS The expression level of LARGE and glycosylation status of αDG were examined in skeletal muscle biopsies from 26 patients with various forms of muscular dystrophy [Duchenne muscular dystrophy (DMD), Becker muscular dystrophy (BMD), sarcoglycanopathy, dysferlinopathy, calpainopathy, and merosin and collagen VI deficient congenital muscular dystrophies (CMDs)] and correlation of results with different histopathological features was investigated. RESULTS Despite the fact that these diseases are not caused by defects of glycosyltransferases, decreased expression of LARGE was detected in many patient samples, partly correlating with the type of muscular dystrophy. Although immunolabelling of fully glycosylated αDG with VIA4-1 was reduced in dystrophinopathy patients, no significant relationship between reduction of LARGE expression and αDG hypoglycosylation was detected. Also, Merosin deficient CMD patients showed normal immunostaining with αDG despite severe reduction of LARGE expression. CONCLUSIONS Our data shows that it is not always possible to correlate LARGE expression and αDG glycosylation in different types of muscular dystrophies and suggests that there might be differences in αDG processing by LARGE which could be regulated under different pathological conditions.
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Affiliation(s)
- Burcu Balci-Hayta
- Department of Medical Biology, Hacettepe University Faculty of Medicine, 06100 Sihhiye, Ankara, Turkey
| | - Beril Talim
- Department of Pediatrics, Pathology Unit, Hacettepe University Faculty of Medicine, 06100 Sihhiye, Ankara, Turkey
| | - Gulsev Kale
- Department of Pediatrics, Pathology Unit, Hacettepe University Faculty of Medicine, 06100 Sihhiye, Ankara, Turkey
| | - Pervin Dincer
- Department of Medical Biology, Hacettepe University Faculty of Medicine, 06100 Sihhiye, Ankara, Turkey
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