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Cigel A, Sayin O, Gurgen SG, Sonmez A. Long term neuroprotective effects of acute single dose MK-801treatment against traumatic brain injury in immature rats. Neuropeptides 2021; 88:102161. [PMID: 34098454 DOI: 10.1016/j.npep.2021.102161] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 04/28/2021] [Accepted: 05/16/2021] [Indexed: 10/21/2022]
Abstract
Because brain development continues during adolescence, childhood trauma is a major health problem in pediatric ages. It is known traumatic brain injury (TBI) results in damage in hippocampal and cortical areas of the brain and impairs cognitive functions. The study aims to investigate the long-term effects of MK-801 (dizocilpine), an N-methyl d-aspartate (NMDA) receptor antagonist, on hippocampal damage, locomotor activity, and cognitive functions following TBI in immature rats. MK-801 (1 mg/kg) was injected intraperitoneally immediately after TBI. Thirty-seven litters were randomly allocated into three groups at 7 days (P7) of postnatal age: a control group, a trauma group, and an MK-801 treatment group. The control group received no treatment; the trauma group received saline as vehicle control for the MK-801 group and the MK-801 group received a single dose of 1 mg/kg MK-801 immediately after TBI. Hippocampal damage was examined by Hematoxylin-Eosin staining. Brain-derived neurotrophic factor (BDNF), nerve growth factor (NGF), NMDA-R, and glial fibrillar acidic protein (GFAP) immunohistochemistry and, BDNF, NGF, and NMDA-R ELISA protein levels were evaluated 125 days after trauma. Histopathological and immunohistochemical evaluations showed that treatment with MK-801 significantly ameliorated the trauma-induced hippocampal neuron loss and increased BDNF, NGF, NMDA-R, GFAP expressions in CA1, CA3, and DG hippocampal regions. Additionally, treatment with MK-801 decreased anxiety and increased hippocampus-dependent memory of animals subjected to brain injury after TBI. These results show that acute treatment of MK-801 has a neuroprotective role against trauma-induced hippocampal neuron loss and associated cognitive impairment in rats.
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Affiliation(s)
- Ayse Cigel
- Department of Physiology, Faculty of Medicine, Dokuz Eylul University, Izmir, Turkey.
| | - Oya Sayin
- Research Laboratory, Faculty of Medicine Dokuz Eylul University, Izmir, Turkey.
| | - Seren Gulsen Gurgen
- Department of Histology and Embryology, Faculty of Medicine, Celal Bayar University, Manisa, Turkey
| | - Atac Sonmez
- Department of Physiology, Faculty of Medicine, Dokuz Eylul University, Izmir, Turkey.
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Agca O, Sayin O. The importance of tears stability in SARS-CoV-2 transmission: COVID-19 prevalance in dry eye patients. J Fr Ophtalmol 2021; 44:1115-1120. [PMID: 34294456 PMCID: PMC8264519 DOI: 10.1016/j.jfo.2021.06.004] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Accepted: 06/15/2021] [Indexed: 01/08/2023]
Abstract
Objective To investigate whether dry eye disease (DED) is a risk factor for COVID-19. Method In this retrospective cohort study, patients who were diagnosed with DED by an ophthalmologist and whose Schirmer test was less than 5 mm were identified. Patients who missed follow-up examinations, patients with malignancy, Human Immunodeficiency Virus patients and patients having undergone bone marrow transplantation were excluded. Among the DED patients, patients with positive SARS-CoV-2 PCR tests were identified on October 11, 2020. Subsequently, patients were divided into four age groups (25–49; 50–64; 65–79; and 80+). The COVID-19 prevalence per 100,000 people was determined for each age group, and risk analysis was performed by comparing this with the general population in Turkey. Results In total, 10,023 DED patients were identified and included in the study. Among these, the PCR test was positive in 359 patients. The COVID-19 prevalence per 100,000 population in DED patients was calculated as 3581.7, while according to the Ministry of Health data, it was 524.7 in the general Turkish population. The odds ratio of DED patients versus the general population was 6.62 (P < 0.001) (7.66 in the 25–49 group; 6.59 in the 50–64 group; 6.23 in the 65–79 group; and 7.24 in the 80+ age group). Conclusions The present study showed a high COVID-19 prevalence in DED patients compared to the general population. These findings support the concept that the ocular surface may be a gateway for SARS-CoV-2 and that the tear film is important part of the immune system.
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Affiliation(s)
- O Agca
- Departmant of Ophthalmology, Konya City Hospital, Konya, Turkey.
| | - O Sayin
- Departmant of Ophthalmology, Konya City Hospital, Konya, Turkey
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Sayin O, Micili SC, Goker A, Kamaci G, Ergur BU, Yilmaz O, Guner Akdogan G. The role of resveratrol on full - Thickness uterine wound healing in rats. Taiwan J Obstet Gynecol 2018; 56:657-663. [PMID: 29037554 DOI: 10.1016/j.tjog.2017.08.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/28/2017] [Indexed: 12/16/2022] Open
Abstract
OBJECTIVE Healing of the uterus after cesarean section and myomectomy operation is clinically important. In this study, we aimed to investigate the effects of resveratrol (3,5,4'-o-trihydroxystilbene) on the wound healing process of the uterus in rats treated with resveratrol following full thickness injury of the uterus. MATERIALS AND METHODS Twenty-one female wistar albino rats were divided randomly into three groups (1) control group with no intervention (2) injury group with uterine full thickness injury (3) resveratrol group with uterine full thickness injury and treated with resveratrol. Resveratrol was injected by oral gavage at the doses of 0.5 mg/kg/day for 30 days following uterine full thickness injury. Vascular endothelial growth factor (VEGF) and platelet-derived growth factor (PDGF) distributions were assessed using the immunohistochemical methods in tissue and ELISA methods in the tissue homogenate. Glutathione peroxidase (GPx) and superoxide dismutase (SOD) activities were evaluated with colorimetric method and malondialdehyde (MDA) levels also were measured using high performance liquid chromatography in the tissue homogenate. The effects of resveratrol on the uterine histology also were evaluated histologically with the light microscopy. RESULTS Histological evaluation and immunohistochemical evaluations showed that treatment with a resveratrol significantly increased the thickness of the uterine wall and VEGF expression and decreased expression PDGF during wound healing. Biochemically, GPx and SOD activities were increased significantly after treatment with resveratrol. Additionally, resveratrol administration decreased MDA levels. CONCLUSION These results showed that the antioxidant effects of resveratrol has been shown to have a positive influence on wound healing of the uterus.
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Affiliation(s)
- Oya Sayin
- Research Laboratory, Dokuz Eylul University, Faculty of Medicine, Izmir, Turkey.
| | - Serap Cilaker Micili
- Department of Histology and Embryology, Dokuz Eylul University, Faculty of Medicine, Izmir, Turkey
| | - Asli Goker
- Department of Obstetrics and Gynecology, Celal Bayar University, Faculty of Medicine, Manisa, Turkey
| | - Gonca Kamaci
- Department of Laboratory Animal Science, Dokuz Eylul University, Faculty of Medicine, Izmir, Turkey
| | - Bekir Ugur Ergur
- Department of Histology and Embryology, Dokuz Eylul University, Faculty of Medicine, Izmir, Turkey
| | - Osman Yilmaz
- Department of Laboratory Animal Science, Dokuz Eylul University, Faculty of Medicine, Izmir, Turkey
| | - Gul Guner Akdogan
- Health Science Institute, Izmir University of Economics, Izmir, Turkey
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Yucel OE, Demir S, Niyaz L, Sayin O, Gul A, Ariturk N. Clinical characteristics and prognostic factors of scleral rupture due to blunt ocular trauma. Eye (Lond) 2016; 30:1606-1613. [PMID: 27589050 DOI: 10.1038/eye.2016.194] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 07/11/2016] [Indexed: 11/09/2022] Open
Abstract
PurposeTo describe and identify ocular and wound characteristics, and prognostic factors associated with final visual acuity (VA) in patients with scleral rupture due to blunt ocular trauma.MethodsThe medical records of 61 patients with globe rupture due to blunt ocular trauma who underwent primary repair were reviewed retrospectively. The data recorded included demographic characteristics, initial and final VA, ocular signs, wound characteristics, and surgeries. Initial VA, ocular signs, wound characteristics, and surgeries were analyzed to determine the association with the final VA.ResultsForty three women and 18 men with a mean age of 43.6±23.5 years were included in the study. The locations of scleral wounds were mostly in the superonasal quadrant (41.0%) and zone 2 (75.4%). In eyes with hyphema (P=0.009), vitreous hemorrhage (P=0.001), and retinal detachment (P=0.004), final VA was statistically worse than eyes without these signs. A moderate positive correlation was found between the initial and final VA (P<0.001). Final VA was statistically worse in eyes with horizontal midline wounds than in eyes with vertical midline wounds (P=0.002). A moderate negative correlation was found between scleral wound length and final VA (P<0.001). Patients who underwent cataract surgery had statistically better final VA (P=0.002).ConclusionsScleral rupture was detected mostly in females, superonasal quadrant and zone 2. Poor final VA was significantly associated with poor initial VA, longer wound length, horizontal midline wound, presence of hyphema, vitreous hemorrhage and retinal detachment at presentation, and cataract surgery not performed during follow-up period. Scleral ruptures have different demographic, ocular and wound characteristics than other open globe injuries.
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Affiliation(s)
- O E Yucel
- Department of Ophthalmology, Medical Faculty, Ondokuz Mayis University, Samsun, Turkey
| | - S Demir
- Department of Ophthalmology, Medical Faculty, Gaziosmanpasa University, Tokat, Turkey
| | - L Niyaz
- Department of Ophthalmology, Medical Faculty, Ondokuz Mayis University, Samsun, Turkey
| | - O Sayin
- Clinic of ophthalmology, Develi Hatice Muammer Kocaturk State Hospital, Kayseri, Turkey
| | - A Gul
- Department of Ophthalmology, Medical Faculty, Ondokuz Mayis University, Samsun, Turkey
| | - N Ariturk
- Department of Ophthalmology, Medical Faculty, Ondokuz Mayis University, Samsun, Turkey
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Altincik A, Sayin O. Evaluation of the relationship between serum adropin levels and blood pressure in obese children. J Pediatr Endocrinol Metab 2015; 28:1095-100. [PMID: 26030787 DOI: 10.1515/jpem-2015-0051] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Accepted: 04/17/2015] [Indexed: 11/15/2022]
Abstract
BACKGROUND The prevalence of obesity and related cardiovascular comorbodities is increasing rapidly. Adipokines play a major role in the pathogenesis of obesity-related inflammation and hypertension. AIM The aim of this study was to evaluate the serum adropin levels in obese children and to determine the relationship between adropin levels and blood pressure (BP) in the pediatric age group. METHODS Forty obese children (mean age: 12.5 ± 2.5 years; male/female ratio: 18/22) and 15 healthy controls (mean age: 15 ± 3.14 years; male/female ratio: 5/15) were included in the study. Serum adropin levels, and a number of laboratory and clinical variables were compared. Ambulatory blood pressure monitoring was performed on obese subjects. Relationship between adropin levels and BP variables was examined. RESULTS Serum adropin levels were significantly lower in obese subjects than in healthy controls (193.56 ± 94 vs. 289 ± 187 pg/mL, p = 0.03). Adropin levels were correlated negatively with body mass index z-score (r = -0.56; p = 0.034). There was no correlation between serum adropin levels and laboratory variables in obese subjects. Five of the patients (12.5%) were nondipper, and nine of the patients (22.5%) had hypertension. There was no significant correlation between serum adropin levels and BP variables. CONCLUSION Serum adropin levels were significantly lower in obese children; however, there was no correlation between serum adropin levels and BP variables. Further studies are needed to determine the role of adipokines on BP.
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Affiliation(s)
- Ayça Altincik
- Pediatric Endocrinology Unit, Denizli State Hospital, Denizli, Turkey
| | - Oya Sayin
- Faculty of Medicine, Department of Biochemistry, Dokuz Eylul University, İzmir, Turkey
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Arslan N, Sayin O, Tokgoz Y. Evaluation of serum xenin and ghrelin levels and their relationship with nonalcoholic fatty liver disease and insulin resistance in obese adolescents. J Endocrinol Invest 2014; 37:1091-7. [PMID: 25200997 DOI: 10.1007/s40618-014-0160-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Accepted: 08/10/2014] [Indexed: 01/06/2023]
Abstract
AIM Xenin is a peptide of the neurotensin/xenopsin/xenin family secreted from gastric cells and other tissues. The first aim of this study was to investigate the serum xenin and ghrelin levels in obese children and compare the patients with healthy controls. The second aim was to compare the xenin levels in patients with nonalcoholic fatty liver disease (NAFLD) and also with insulin resistance with the patients without these complications. METHODS 62 obese adolescents (27 with NAFLD) and 32 healthy controls were enrolled in the study. Obesity was defined as a body mass index exceeding the 95th percentile for the patients' age and sex. NAFLD was diagnosed via ultrasonographic examination. The insulin resistance was calculated by a homeostasis model assessment (HOMA-IR) index. Serum xenin and ghrelin levels were assessed by enzyme-linked immunosorbent assay. RESULTS The mean serum xenin concentration was significantly higher in obese adolescents than the healthy peers (68.15 ± 0.63 vs 16.54 ± 0.07 pg/mL, p = 0.000). Serum xenin levels were not different between the patients with and without NAFLD and also between the patients with and without IR (p > 0.05). There was a positive correlation between xenin levels and relative weight (r = 0.663, p < 0.001) and HOMA-IR (r = 0.612, p < 0.001). Ghrelin was negatively correlated with relative weight (r = -0.283, p < 0.05). CONCLUSION In this study, serum xenin levels of both groups of obese patients were found higher than controls. On the other hand, xenin levels were not different in patients with and without NAFLD. High levels of xenin may be in relation with obesity.
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Affiliation(s)
- N Arslan
- Division of Pediatric Gastroenterology, Nutrition and Metabolism, Department of Pediatrics, Dokuz Eylul University Faculty of Medicine, Izmir, Turkey,
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Cavdar Z, Egrilmez MY, Altun ZS, Arslan N, Yener N, Sayin O, Genc S, Genc K, Islekel H, Oktay G, Akdogan GG. Resveratrol reduces matrix metalloproteinase-2 activity induced by oxygen-glucose deprivation and reoxygenation in human cerebral microvascular endothelial cells. INT J VITAM NUTR RES 2013; 82:267-74. [PMID: 23591664 DOI: 10.1024/0300-9831/a000119] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The main pathophysiology in cerebral ischemia is the structural alteration in the neurovascular unit, coinciding with neurovascular matrix degradation. Among the human matrix metalloproteinases (MMPs), MMP-2 and -9, known as gelatinases, are the key enzymes for degrading type IV collagen, which is the major component of the basal membrane that surrounds the cerebral blood vessel. In the present study, we investigated the effects of resveratrol on cytotoxicity, reactive oxygen species (ROS), and gelatinases (MMP-2 and -9) in human cerebral microvascular endothelial cells exposed to 6 hours of oxygen-glucose deprivation and a subsequent 24 hours of reoxygenation with glucose (OGD/R), to mimic ischemia/reperfusion in vivo. Lactate dehydrogenase increased significantly, in comparison to that in the normoxia group. ROS was markedly increased in the OGD/R group, compared to normoxia. Correspondingly, ROS was significantly reduced with 50 μM of resveratrol. The proMMP-2 activity in the OGD/R group showed a statistically significant increase from the control cells. Resveratrol preconditioning decreased significantly the proMMP-2 in the cells exposed to OGD/R in comparison to that in the OGD/R group. Our results indicate that resveratrol regulates MMP-2 activity induced by OGD/R via its antioxidant effect, implying a possible mechanism related to the neuroprotective effect of resveratrol.
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Affiliation(s)
- Zahide Cavdar
- Dokuz Eylül University, Health Science Institute, Department of Molecular Medicine, Inciraltı, Izmir, Turkey.
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Sayin O, Arslan N, Guner G. The protective effects of resveratrol on human coronary artery endothelial cell damage induced by hydrogen peroxide in vitro. Acta Clin Croat 2012; 51:227-235. [PMID: 23115947] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023] Open
Abstract
Oxidative stress is defined as imbalance between the production and destruction of reactive oxygen species. The aim of this study was to investigate whether resveratrol could protect human endothelial cells against hydrogen peroxide damage in vitro. In this in vitro study on human coronary endothelial cells, the effects of resveratrol on the glutathione content in human coronary endothelial cells in vitro were evaluated with high performance liquid chromatography. The effects of resveratrol on protein expression of the glutamate cysteine ligase, glutathione peroxidase and glutathione reductase enzymes were evaluated with the Western blot method. Resveratrol increased the reduced glutathione contents significantly (p < 0.05). Resveratrol increased protein expression of the glutamate cysteine ligase, glutathione peroxidase-1 and glutathione reductase enzymes (p < 0.05). All data supported each other and suggested that resveratrol had a protective effect against human coronary artery endothelial cell damage. It is thought that these results could pave the way to the new therapeutic approaches to protect against oxidative stress that develops in cardiovascular diseases.
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Affiliation(s)
- Oya Sayin
- Research Laboratory, School of Medicine, Dokuz Eylul University, Izmir, Turkey
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Goksel OS, Sayin O, Ugurlucan M, Sungur Z, Tireli E, Dayioglu E. Aortic arch replacement without circulatory arrest: a simplified technique with two grafts. Thorac Cardiovasc Surg 2007; 55:327-9. [PMID: 17629867 DOI: 10.1055/s-2006-955960] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Aortic arch reconstruction remains a challenge for the cardiothoracic surgeon. We present our simplified technique in which we used two grafts for arch reconstruction without circulatory arrest. It is a relatively easy and quick technique consisting of a unique modification of the selective antegrade cerebral circulation system without the need for circulatory arrest in selected cases.
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Affiliation(s)
- O S Goksel
- Department of Cardiovascular Surgery, Istanbul University, Istanbul Medical Faculty, Istanbul, Turkey.
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