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Gacemer HA, Tosun BG, Helvacioglu D, Yaman A, Abali ZY, Haliloglu B, Turan SD, Haklar G, Bereket A, Guran T. Development of external genitalia during mini-puberty: is it related to somatic growth or reproductive hormones? Eur J Pediatr 2024; 183:1325-1332. [PMID: 38133811 DOI: 10.1007/s00431-023-05393-3] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 12/06/2023] [Accepted: 12/14/2023] [Indexed: 12/23/2023]
Abstract
Although hypothalamo-pituitary-gonadal axis is active during mini-puberty, its relationship with somatic growth and the role on the development of external genitalia has not been fully elucidated. We aimed to evaluate the effects of somatic growth and reproductive hormones on the development of external genitalia during mini-puberty. Anthropometric data, pubertal assesment, serum follicle-stimulating hormone (FSH), luteinizing hormone (LH), dehydroepiandrosterone sulfate (DHEAS), androstenedione (A4), sex-hormone binding globulin (SHBG), estradiol (E2) and inhibin-B, testosterone (T), and anti-Mullerian Hormone (AMH) of healthy infants aged 1-4 months were evaluated. Free sex hormone index was calculated as T/SHBG for boys and E2/SHBG for girls. The mean age of 148 (74 female) infants included in the study was 2.31 ± 0.76 months. Tanner stage 2-3 sex steroid and gonadotropin levels were observed. A statistically significant difference was found between the weight, height, BMI, weight gain and serum FSH, LH, and A4 measurements of girls and boys (p < 0.05). Penile length was associated with weight (r = 0.24, p = 0.03), height (r = 0.25, p = 0.02), and AMH (r = 0.3, p = 0.01), but not with testosterone (p = 0.56 respectively). A negative correlation was found between weight and serum LH (r = - 0.26, p = 0.2) and T/SHBG levels in males (r = - 0.38, p = 0.015 respectively). Weight-SDS was negatively correlated with testosterone in males (r = - 0.25, p = 0.02). Testicular size and breast stage did not correlate with any of the hormonal and anthropometric parameters. Conclusions: External genitalia in males during mini-puberty is related more to somatic growth rather than reproductive hormones. Similar to pubertal developmental stages, both total and free testosterone are negatively associated with higher weight during mini-puberty. What is Known: • Mini-puberty allows early assessment of HPG axis function in infancy. • There is an inverse relationship between the amount of adipose tissue and circulating testosterone levels in males during puberty and adulthood. • The potential effect of somatic growth and reproductive hormones on external genital development during mini-puberty remains unclear. What is New: • During mini-puberty, males' external genitalia is more related to somatic growth than to reproductive hormones, but this relationship is not observed in girls. • Both total and free testosterone are negatively associated with higher weight during mini-puberty, similar to the pubertal developmental stages.
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Affiliation(s)
- Hazal Arıkan Gacemer
- Department of Pediatrics, Marmara University School of Medicine, 34841, Istanbul, Turkey
| | - Busra Gurpinar Tosun
- Department of Pediatric Endocrinology and Diabetes, Marmara University School of Medicine, 34841, Istanbul, Turkey
| | - Didem Helvacioglu
- Department of Pediatric Endocrinology and Diabetes, Marmara University School of Medicine, 34841, Istanbul, Turkey
| | - Ali Yaman
- Department of Biochemistry, Marmara University School of Medicine, 34841, Istanbul, Turkey
| | - Zehra Yavas Abali
- Department of Pediatric Endocrinology and Diabetes, Marmara University School of Medicine, 34841, Istanbul, Turkey
| | - Belma Haliloglu
- Department of Pediatric Endocrinology and Diabetes, Marmara University School of Medicine, 34841, Istanbul, Turkey
| | - Serap Demircioglu Turan
- Department of Pediatric Endocrinology and Diabetes, Marmara University School of Medicine, 34841, Istanbul, Turkey
| | - Goncagul Haklar
- Department of Biochemistry, Marmara University School of Medicine, 34841, Istanbul, Turkey
| | - Abdullah Bereket
- Department of Pediatric Endocrinology and Diabetes, Marmara University School of Medicine, 34841, Istanbul, Turkey
| | - Tulay Guran
- Department of Pediatric Endocrinology and Diabetes, Marmara University School of Medicine, 34841, Istanbul, Turkey.
- Department of Pediatric Endocrinology and Diabetes, Marmara University School of Medicine, Fevzi Cakmak Mh, Ustkaynarca/Pendik, Mimar Sinan Cd. No. 41. 34899, Istanbul, Turkey.
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Ergun T, Hosgoren Tekin S, Apti Sengun O, Akin Cakici O, Seckin D, Adiay C, Enul H, Yilmaz S, Ay P, Haklar G, Sili U. Immunogenicity, efficacy, and safety of CoronaVac and Pfizer/BioNTech mRNA vaccines in patients with psoriasis receiving systemic therapies: A prospective cohort study. Vaccine 2023:S0264-410X(23)00615-1. [PMID: 37277251 DOI: 10.1016/j.vaccine.2023.05.052] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 05/08/2023] [Accepted: 05/18/2023] [Indexed: 06/07/2023]
Abstract
BACKGROUND AND OBJECTIVES Evidence of immune response to COVID-19 vaccine in psoriasis patients on biological agents is lacking. This study aimed to evaluate SARS-CoV-2 antibody levels following vaccination with CoronaVac or Pfizer/BioNTech mRNA in patients using biological agents or methotrexate, high-titer antibody levels achievement rate, and impact of medications on immunogenicity. METHODS This noninterventional, prospective cohort study included 89 patients and 40 controls vaccinated with two doses of inactivated (CoronaVac) or Pfizer/BioNTech mRNA vaccines. Anti-spike and neutralising antibodies were analysed before and three to six weeks after the second dose. Adverse effects and symptomatic COVID-19 were assessed. RESULTS Median anti-spike and neutralising antibody titers after CoronaVac were significantly lower in patients than controls (57.92 U/mL vs 125.4 U/mL, and 1/6 vs 1/32, respectively, p < 0.05). Patients were less likely to achieve high-titer anti-spike antibody levels (25.6 % vs 50 %). Infliximab was associated with attenuated vaccine response. Pfizer/BioNTech vaccine induced comparable median anti-spike (2,080 U/mL vs 2,976.5 U/mL,) and neutralising antibody levels (1/96 vs 1/160) in patients and controls, respectively (p > 0.05). High-titer anti-spike and neutralising antibodies development rates were comparable among patients and controls (95.2 % vs 100 %, and 30.4 % vs 50.0 %, respectively, p > 0.05). Nine (10.1 %) COVID-19 cases- all mild - were identified. Psoriasis flare was seen in 6.74 %, mostly after Pfizer/BioNTech vaccine. CONCLUSION Psoriasis patients treated with biological agents and methotrexate developed similar response to mRNA vaccine but weaker response to inactivated vaccine. Infliximab reduced response to the inactivated vaccine. Adverse effects were more frequent with mRNA vaccine, but none was severe.
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Affiliation(s)
- Tulin Ergun
- Marmara University, School of Medicine, Department of Dermatology, Istanbul, Turkey.
| | | | - Ozlem Apti Sengun
- Marmara University, School of Medicine, Department of Dermatology, Istanbul, Turkey
| | - Ozlem Akin Cakici
- Marmara University, School of Medicine, Department of Dermatology, Istanbul, Turkey
| | - Dilek Seckin
- Marmara University, School of Medicine, Department of Dermatology, Istanbul, Turkey
| | - Cumhur Adiay
- Pendik Veterinary Control Institute, Istanbul, Turkey
| | - Hakan Enul
- Pendik Veterinary Control Institute, Istanbul, Turkey
| | - Seval Yilmaz
- Marmara University, School of Medicine, Department of Biochemistry, Istanbul, Turkey
| | - Pinar Ay
- Marmara University, School of Medicine, Department of Public Health, Istanbul, Turkey
| | - Goncagul Haklar
- Marmara University, School of Medicine, Department of Biochemistry, Istanbul, Turkey
| | - Uluhan Sili
- Marmara University, School of Medicine, Department of Infectious Diseases and Clinical Microbiology, Istanbul, Turkey
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Ergenc I, Capar E, Erturk SB, Bahramzade G, Atalah F, Kocakaya D, Karakurt S, Haklar G, Odabasi Z. Diagnostic performance of lactate dehydrogenase (LDH) isoenzymes levels for the severity of COVID-19. J Med Biochem 2023; 42:16-26. [PMID: 36819140 PMCID: PMC9920992 DOI: 10.5937/jomb0-37234] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 06/09/2022] [Indexed: 11/02/2022] Open
Abstract
Background Lactate dehydrogenase (LDH) levels predict coronavirus disease 2019 (COVID-19) severity. We investigated LDH isoenzyme levels to identify the tissue responsible for serum LDH elevation in patients with COVID-19. Methods Hospitalised COVID-19 patients with serum LDH levels exceeding the upper reference limit included. LDH isoenzymes were detected quantitatively on agarose gels. The radiological severity of lung involvement on computed tomography was scored as 0-5 for each lobe (total possible score, 0-25). Disease severity was determined using the World Health Organization (WHO) clinical progression scale. Results In total, 111 patients (mean age, 59.96 ± 16.14), including 43 females (38.7%), were enrolled. The serum levels of total LDH and all five LDH isoenzymes were significantly higher in the severe group. The levels of all LDH isoenzymes excluding LDH5 positively correlated with the WHO score. LDH3 levels correlated with chest computed tomography findings (r2 = 0.267, p = 0.005). On multivariate analysis, LDH3 was an independent risk factor for the deterioration of COVID-19. Conclusions LDH3 appears to be an independent risk factor for deterioration in patients with COVID-19. LDH elevation in patients with COVID-19 predominantly resulted from lung, liver and muscle damage.
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Affiliation(s)
- Ilkay Ergenc
- Marmara University, School of Medicine, Department of Gastroenterology, Istanbul, Turkey
| | - Emre Capar
- Marmara University, School of Medicine, Department of Internal Medicine, Istanbul, Turkey
| | - Sengel Buket Erturk
- Marmara University, School of Medicine, Department of Infectious Disease and Clinical Microbiology, Istanbul, Turkey
| | - Gunel Bahramzade
- Marmara University, School of Medicine, Department of Biochemistry, Istanbul, Turkey
| | - Fatih Atalah
- Marmara University, School of Medicine, Department of Internal Medicine, Istanbul, Turkey
| | - Derya Kocakaya
- Marmara University, School of Medicine, Department of Pulmonary Medicine, Istanbul, Turkey
| | - Sait Karakurt
- Marmara University, School of Medicine, Department of Pulmonary Medicine, Istanbul, Turkey
| | - Goncagul Haklar
- Marmara University, School of Medicine, Department of Biochemistry, Istanbul, Turkey
| | - Zekaver Odabasi
- Marmara University, School of Medicine, Department of Internal Medicine, Istanbul, Turkey
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Ozdemir-Kumral ZN, Sen E, Yapici HB, Atakul N, Domruk OF, Aldag Y, Sen LS, Kanpalta Mustafaoğlu F, Yuksel M, Akakin D, Erzik C, Haklar G, Imeryuz N. Phoenixin 14 ameloriates pancreatic injury in streptozotocin-induced diabetic rats by alleviating oxidative burden. J Pharm Pharmacol 2022; 74:1651-1659. [PMID: 36130115 DOI: 10.1093/jpp/rgac055] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 07/04/2022] [Indexed: 02/05/2023]
Abstract
Phoenixin-14 (PNX) is a neuropeptide that has been shown to prevent oxidative damage and stimulates insulin secretion. We investigated the effects of PNX on pancreatic injury induced by streptozotocin (STZ), and nicotinamide (NAD). Male Sprague-Dawley rats, in control (C) and diabetic (STZ) groups, were treated with either saline, or PNX (0.45 nmol/kg, or 45 nmol/kg) daily for 3 days 1 week after STZ injection. Fasting blood glucose (FBG) and gastric emptying rate (GER) were measured. Tissue and blood samples were collected. PNX treatments prevented pancreatic damage and β cell loss. Increased luminol and lucigenin levels in the pancreas, ileum and liver tissues of STZ groups were alleviated by PNX treatment in pancreatic and ileal tissues. PNX0.45 decreased FBG without any change in insulin blood level and pancreatic mRNA. GER increased in all diabetic rats while PNX0.45 delayed GER only in the C group. PNX diminishes pancreatic damage and lowers FBG by reducing oxidative load.
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Affiliation(s)
| | - Eminenur Sen
- Marmara University School of Medicine, Istanbul, Turkey
| | | | | | | | - Yusra Aldag
- Marmara University School of Medicine, Istanbul, Turkey
| | - Leyla Semiha Sen
- Department of Physiology, Marmara University School of Medicine, Istanbul, Turkey.,Department of General Surgery, Marmara University School of Medicine, Istanbul, Turkey
| | | | - Meral Yuksel
- Department of Medical Laboratory Technics, Marmara University Vocational School of Health Services, Istanbul, Turkey
| | - Dilek Akakin
- Department of Histology and Embryology, Marmara University School of Medicine, Istanbul, Turkey
| | - Can Erzik
- Department of Medical Biology, Marmara University School of Medicine, Istanbul, Turkey
| | - Goncagul Haklar
- Department of Biochemistry, Marmara University School of Medicine, Istanbul, Turkey
| | - Neşe Imeryuz
- Department of Physiology, Marmara University School of Medicine, Istanbul, Turkey
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Gogas Yavuz D, Ersoy R, Altuntas Y, Bilen H, Pamuk B, Apaydin T, Temizkan S, Altuntas H, Mert M, Akalin A, Sert M, Simsir IY, Hekimsoy Z, Canturk Z, Uc ZA, Iplikci S, Yasar M, Unubol M, Sezer K, Topaloglu O, Iyidir OT, Pekkolay Z, Atmaca A, Dikbas O, Ozdemir N, Gul K, Deniz F, Ertorer E, Karaca Z, Elbuken G, Arpaci D, Agbaht K, Turan E, Anaforoglu I, Bayraktaroglu T, Haklar G, Daglioglu G, Tuzcu A, Sahin I, Cetinkalp S. Prevalence of Vitamin D Deficiency and Hypervitaminosis D Among Adult Patients Admitted to the Tertiary Care Hospitals in Turkey. Turk J Endocrinol Metab 2022. [DOI: 10.5152/tjem.2022.22031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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6
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Apaydin T, Polat H, Dincer Yazan C, Ilgin C, Elbasan O, Dashdamirova S, Bayram F, Tukenmez Tigen E, Unlu O, Tekin AF, Arslan E, Yilmaz I, Haklar G, Ata P, Gozu H. Effects of vitamin D receptor gene polymorphisms on the prognosis of COVID-19. Clin Endocrinol (Oxf) 2022; 96:819-830. [PMID: 34919268 DOI: 10.1111/cen.14664] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [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: 09/12/2021] [Revised: 12/11/2021] [Accepted: 12/14/2021] [Indexed: 01/15/2023]
Abstract
PURPOSE Vitamin D deficiency has emerged as another potential risk factor for coronavirus disease (COVID-19) due to the immunomodulatory effects of 25 hydroxyvitamin D [25 (OH)D]. Vitamin D receptor (VDR) gene polymorphisms such as Fok I, Bsm I, Apa I, and Taq I are also associated with different courses of viral infections. This study aimed to evaluate the association between the VDR gene polymorphism at Fok I, Taq I, Bsm I, and Apa I genotypes and the prognosis of COVID-19 in respect to vitamin D deficiency. METHODS Two-hundred ninety-seven patients with COVID-19 were enrolled. Serum 25 (OH)D levels were measured. Four variant regions of the VDR gene, FokI, BsmI, ApaI, and TaqI were determined. RESULTS Eighty-three percent of subjects had vitamin D deficiency, and 40.7% of the whole group had severe deficiency. Median 25 (OH)D level was 11.97 ng/ml. Vitamin D levels were not related to inflammatory markers, disease severity, admission to intensive care unit (ICU), and mortality. While disease severity was related to Fok I Ff genotype, it was Taq TT genotype for ICU admission. Moreover, the ApaI aa genotype was common among the patients who were died. None of the deceased subjects had the Fok I FF genotype. CONCLUSION 25 (OH)D levels were not related to the severity and mortality of COVID-19. VDR gene polymorphisms are independently associated with the severity of COVID-19 and the survival of patients.
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Affiliation(s)
- Tugce Apaydin
- Department of Endocrinology and Metabolism, Marmara University School of Medicine, Istanbul, Turkey
| | - Hamza Polat
- Department of Medical Genetics, Marmara University School of Medicine, Istanbul, Turkey
| | - Ceyda Dincer Yazan
- Department of Endocrinology and Metabolism, Marmara University School of Medicine, Istanbul, Turkey
| | - Can Ilgin
- Department of Public Health, Marmara University School of Medicine, Istanbul, Turkey
| | - Onur Elbasan
- Department of Endocrinology and Metabolism, Marmara University School of Medicine, Istanbul, Turkey
| | - Saida Dashdamirova
- Department of Endocrinology and Metabolism, Marmara University School of Medicine, Istanbul, Turkey
| | - Feyza Bayram
- Department of Medical Genetics, Marmara University School of Medicine, Istanbul, Turkey
| | - Elif Tukenmez Tigen
- Department of Infectious Diseases and Microbiology, Marmara University School of Medicine, Istanbul, Turkey
| | - Ozan Unlu
- Department of Biochemistry, Marmara University School of Medicine, Istanbul, Turkey
| | - Ahmet F Tekin
- Department of Biochemistry, Marmara University School of Medicine, Istanbul, Turkey
| | - Ebru Arslan
- Department of Medical Genetics, Marmara University School of Medicine, Istanbul, Turkey
| | - Ipek Yilmaz
- Department of Medical Genetics, Marmara University School of Medicine, Istanbul, Turkey
| | - Goncagul Haklar
- Department of Biochemistry, Marmara University School of Medicine, Istanbul, Turkey
| | - Pınar Ata
- Department of Medical Genetics, Marmara University School of Medicine, Istanbul, Turkey
| | - Hulya Gozu
- Department of Endocrinology and Metabolism, Marmara University School of Medicine, Istanbul, Turkey
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7
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Yazan CD, Yaman A, Haklar G, Sirikci O, Deyneli O. Free and Bioavailable Vitamin D Levels of Patients with Type 1 Diabetes Mellitus and Association with Bone Metabolism. J Diabetes Metab Disord 2022; 21:689-695. [PMID: 35673502 PMCID: PMC9167174 DOI: 10.1007/s40200-022-01032-0] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 03/14/2022] [Indexed: 11/28/2022]
Abstract
Aim Vitamin D deficiency is known to be associated with metabolic bone diseases. The aim of this study is to evaluate vitamin D and calculated free and bioactive vitamin D levels of type 1 diabetic patients and to evaluate the association with bone turnover markers. Method This cross-sectional study includes 60 patients admitted to endocrinology outpatient clinic with diagnosis of type 1 diabetes mellitus and 60 controls. Weight, height and waist circumference were recorded and blood samples were taken for measurement of 25-hydroxyvitamin D (25(OH)D), vitamin D binding protein (VDBP), osteocalcin, bone alkaline phosphatase (bone-ALP), c-telopeptide. Free and bioavailable vitamin D levels were calculated with formula. Results Vitamin D levels of type 1 diabetic patients were significantly higher (p = 0.01). Parathormone levels of the group with vitamin D level under 20 ng/ml was significantly higher (p = 0.029). VDBP levels were similar in both groups. Correlation analysis of free and bioavailable vitamin D level with osteocalcin, c-telopeptide, bone alkaline phosphatase revealed only a weak significant correlation between free vitamin D and osteocalcin (r = -0.201; p = 0.028). A negative correlation was determined between 25(OH)D and parathormone levels (r = -0.294; p < 0.005). Serum osteocalcin, bone alkaline phosphatase and c-telopeptide levels of control group were significantly higher. Conclusion 25(OH)D levels of the study population was extremely low. The measurement of VDBP and calculated free and bioactive vitamin D levels did not show a better correlation with bone turnover markers according to 25(OH)D levels.
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Affiliation(s)
- Ceyda Dincer Yazan
- Department of Endocrinology and Metabolism, Marmara University School of Medicine, Istanbul, Turkey
| | - Ali Yaman
- Department of Biochemistry, Marmara University School of Medicine, Istanbul, Turkey
| | - Goncagul Haklar
- Department of Biochemistry, Marmara University School of Medicine, Istanbul, Turkey
| | - Onder Sirikci
- Department of Biochemistry, Marmara University School of Medicine, Istanbul, Turkey
| | - Oguzhan Deyneli
- Department of Endocrinology and Metabolism, Koc University School of Medicine, Istanbul, Turkey
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Bilgin H, Marku M, Yilmaz SS, Karahasan Yagci A, Sili U, Can B, Can Sarinoglu R, Mulazimoglu Durmusoglu L, Haklar G, Sirikci O, Eksioglu Demiralp E. The effect of immunization with inactivated SARS-CoV-2 vaccine (CoronaVac) and/or SARS-CoV-2 infection on antibody levels, plasmablasts, long-lived-plasma-cells, and IFN-γ release by natural killer cells. Vaccine 2022; 40:2619-2625. [PMID: 35339303 PMCID: PMC8930391 DOI: 10.1016/j.vaccine.2022.03.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [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: 11/20/2021] [Revised: 02/25/2022] [Accepted: 03/01/2022] [Indexed: 01/17/2023]
Abstract
OBJECTIVES We evaluated the antibody response, natural killer cell response and B cell phenotypes in healthcare workers (HCW) who are vaccinated with two doses of CoronaVac with or without documented SARS-CoV-2 infection and unvaccinated HCWs with SARS-CoV-2 infection. METHODS HCWs were divided into four groups: vaccine only (VO), vaccine after SARS-CoV-2 infection (VAI), SARS-CoV-2 infection only (IO), and SARS-CoV-2 infection after vaccine (IAV). Anti-SARS-CoV-2 spike protein (Anti-S) antibodies were measured by Elecsys Anti-SARS-CoV-2 S ELISA kit. Memory B cells (CD19+CD27+), plasmablast B cells (CD19+CD138+) and long-lived plasma cells (LLPC; CD138+CD19-) were measured by flow cytometry in 74 patients. Interferon gamma (IFN-γ) release by natural killer (NK) cells were measured by NKVue Test (NKMAX, Republic of Korea) in 76 patients. RT-PCR was performed with Bio-speedy® COVID-19 qPCR detection kit, Version 2 (Bioexen LTD, Istanbul, Turkey). RESULTS The Anti-S antibodies were detectable in all HCWs (n: 224). The median Anti-S titers (BAU/mL) was significantly higher in VAI (620 25-75% 373-1341) compared to VO (136, 25-75% 85-283) and IO (111, 25-75% 54-413, p < 0.01). VAI group had significantly lower percentage of plasmablasts (2.9; 0-8.7) compared to VO (6.8; 3.5-12.0) and IO (9.9; 4.7-47.5, p < 0.01) (n:74). Percentage of LLPCs in groups VO, VAI and IO was similar. There was no difference of IFN-γ levels between the study groups (n: 76). CONCLUSION The antibody response was similar between uninfected vaccinated HCWs and unvaccinated HCWs who had natural infection. HCWs who had two doses of CoronaVac either before or after the natural SARS-CoV-2 infection elicited significantly higher antibody responses compared to uninfected vaccinated HCWs. The lower percentages of plasmablasts in the VAI group may indicate their migration to lymph nodes and initiation of the germinal center reaction phase. IFN-γ response did not differ among the groups.
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Affiliation(s)
- Huseyin Bilgin
- Marmara University, School of Medicine, Department of Infectious Diseases and Clinical Microbiology, Istanbul, Turkey
| | - Marisa Marku
- Marmara University, School of Medicine, Department of Infectious Diseases and Clinical Microbiology, Istanbul, Turkey
| | - Sultan Seval Yilmaz
- Marmara University, School of Medicine, Department of Biochemistry, Istanbul, Turkey
| | | | - Uluhan Sili
- Marmara University, School of Medicine, Department of Infectious Diseases and Clinical Microbiology, Istanbul, Turkey
| | - Baris Can
- Marmara University, School of Medicine, Department of Microbiology, Istanbul, Turkey
| | - Rabia Can Sarinoglu
- Marmara University, School of Medicine, Department of Microbiology, Istanbul, Turkey
| | | | - Goncagul Haklar
- Marmara University, School of Medicine, Department of Biochemistry, Istanbul, Turkey
| | - Onder Sirikci
- Marmara University, School of Medicine, Department of Biochemistry, Istanbul, Turkey,Corresponding author at: Fevzi Cakmak Mah Muhsinyazicioglu Cad No: 10 Marmara University Pendik Hospital, 34899 Istanbul, Turkey
| | - Emel Eksioglu Demiralp
- Istanbul Memorial Şişli Hospital, Tissue Typing and Immunology Laboratory, Istanbul, Turkey
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Apaydin T, Sahin B, Dashdamirova S, Yazan CD, Elbasan O, Ilgin C, Bilgin H, Cam HK, Bahramzada G, Kucuk A, Haklar G, Gozu HI. The association of free testosterone levels with COVID‐19. Andrology 2022; 10:1038-1046. [DOI: 10.1111/andr.13152] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Revised: 01/01/2022] [Accepted: 01/04/2022] [Indexed: 11/28/2022]
Affiliation(s)
- Tugce Apaydin
- Marmara University School of Medicine Department of Endocrinology and Metabolism Istanbul Turkey
| | - Bahadır Sahin
- Marmara University School of Medicine Department of Urology Istanbul Turkey
| | - Saida Dashdamirova
- Marmara University School of Medicine Department of Endocrinology and Metabolism Istanbul Turkey
| | - Ceyda Dincer Yazan
- Marmara University School of Medicine Department of Endocrinology and Metabolism Istanbul Turkey
| | - Onur Elbasan
- Marmara University School of Medicine Department of Endocrinology and Metabolism Istanbul Turkey
| | - Can Ilgin
- Marmara University School of Medicine Department of Public Health Istanbul Turkey
| | - Hüseyin Bilgin
- Marmara University School of Medicine Department of Infectious Diseases and Clinical Microbiology Istanbul Turkey
| | - Haydar Kamil Cam
- Marmara University School of Medicine Department of Urology Istanbul Turkey
| | - Gunel Bahramzada
- Marmara University School of Medicine Department of Biochemistry Istanbul Turkey
| | - Aleyna Kucuk
- Marmara University School of Medicine Department of Biochemistry Istanbul Turkey
| | - Goncagul Haklar
- Marmara University School of Medicine Department of Biochemistry Istanbul Turkey
| | - Hulya Iliksu Gozu
- Marmara University School of Medicine Department of Endocrinology and Metabolism Istanbul Turkey
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10
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Gunes M, Temizkan S, Apaydin T, Ilgin C, Haklar G, Gogas Yavuz D. Serum osteoprotegerin levels, endothelial function and carotid intima-media thickness in type 2 diabetic patients. J Diabetes Complications 2021; 35:108073. [PMID: 34635402 DOI: 10.1016/j.jdiacomp.2021.108073] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 03/16/2021] [Revised: 08/30/2021] [Accepted: 10/02/2021] [Indexed: 11/15/2022]
Abstract
OBJECTIVES Osteoprotegerin (OPG), a well-known protein that inhibits osteoclast formation and activity, might also be a potential marker for identifying patients with high cardiovascular risk. This study aimed to compare OPG levels, FMD, and CIMT measurements in subjects with vs. without diabetes and investigate the association of serum osteoprotegerin level with the early atherosclerotic markers, endothelial function, and carotid intima-media thickness (CIMT) in patients with type 2 diabetes mellitus (DM2). METHODS Forty-nine patients with DM2 (F/M: 26/23, 49.3 ± 10.0 years) and 45 healthy volunteers (F/M: 26/19, 48.3 ± 7.5 years) were included in this cross-sectional study. Serum OPG levels were measured by solid-phase enzyme-linked immunosorbent assay (ELISA). Fasting plasma glucose (FPG) and HbA1c levels were measured. CIMT was measured by B-mode ultrasound, and endothelial function was evaluated via flow-mediated dilation (FMD) of the brachial artery with Doppler ultrasonography. RESULTS Serum OPG levels were significantly higher in patients with DM2 (617.0 ± 111.0 pg/mL) compared to controls (481.0 ± 96.0 pg/mL, p < 0.001). While CIMT in diabetic patients (0.65 + 0.13 mm) was higher than controls (0.54 ± 0.10 mm, p = 0.009), FMD measurement was lower in DM2 group (4.2% ± 3.1 mm vs. 7.6% ± 4.1 mm, p = 0.01). Univariate analysis showed that OPG was associated with the presence of diabetes (OR: 6.999, p = 0.001, R2: 15.1%) and hypertension (OR = 6.925, p = 0.001, R2: 13.2%). There was no relationship between OPG levels and CIMT or FMD. CONCLUSION Osteoprotegerin and CIMT levels were increased, and FMD measurements were decreased in patients with DM2. No association between CIMT, FMD, and OPG measurements was observed. The presence of DM and hypertension were associated with circulating OPG levels.
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Affiliation(s)
- Mutlu Gunes
- Marmara University School of Medicine, Department of Endocrinology and Metabolism, Istanbul, Turkey.
| | - Sule Temizkan
- Marmara University School of Medicine, Department of Endocrinology and Metabolism, Istanbul, Turkey
| | - Tugce Apaydin
- Marmara University School of Medicine, Department of Endocrinology and Metabolism, Istanbul, Turkey.
| | - Can Ilgin
- Marmara University School of Medicine, Department of Public Health, Istanbul, Turkey
| | - Goncagul Haklar
- Marmara University School of Medicine, Department of Biochemistry, Istanbul, Turkey.
| | - Dilek Gogas Yavuz
- Marmara University School of Medicine, Department of Endocrinology and Metabolism, Istanbul, Turkey.
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11
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Yildiz M, Isik E, Abali ZY, Keskin M, Ozbek MN, Bas F, Ucakturk SA, Buyukinan M, Onal H, Kara C, Storbeck KH, Darendeliler F, Cayir A, Unal E, Anik A, Demirbilek H, Cetin T, Dursun F, Catli G, Turan S, Falhammar H, Baris T, Yaman A, Haklar G, Bereket A, Guran T. Clinical and Hormonal Profiles Correlate With Molecular Characteristics in Patients With 11β-Hydroxylase Deficiency. J Clin Endocrinol Metab 2021; 106:e3714-e3724. [PMID: 33830237 DOI: 10.1210/clinem/dgab225] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [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: 11/26/2020] [Indexed: 11/19/2022]
Abstract
BACKGROUND Given the rarity of 11β-hydroxylase deficiency (11βOHD), there is a paucity of data about the differences in clinical and biochemical characteristics of classic (C-11βOHD) and nonclassic 11βOHD (NC-11βOHD). OBJECTIVE To characterize a multicenter pediatric cohort with 11βOHD. METHOD The clinical and biochemical characteristics were retrospectively retrieved. CYP11B1 gene sequencing was performed. Seventeen plasma steroids were quantified by liquid chromatography-mass spectrometry and compared to that of controls. RESULTS 102 patients (C-11βOHD, n = 92; NC-11βOHD, n = 10) from 76 families (46,XX; n = 53) had biallelic CYP11B1 mutations (novel 9 out of 30). Five 46,XX patients (10%) were raised as males. Nineteen patients (19%) had initially been misdiagnosed with 21-hydroxylase deficiency. Female adult height was 152 cm [-1.85 SD score (SDS)] and male 160.4 cm (-2.56 SDS).None of the NC-11βOHD girls had ambiguous genitalia (C-11βOHD 100%), and none of the NC-11βOHD patients were hypertensive (C-11βOHD 50%). Compared to NC-11βOHD, C-11βOHD patients were diagnosed earlier (1.33 vs 6.9 years; P < 0.0001), had higher bone age-to-chronological age (P = 0.04) and lower adult height (-2.46 vs -1.32 SDS; P = 0.05). The concentrations of 11-oxygenated androgens and 21-deoxycortisol were low in all patients. The baseline ACTH and stimulated cortisol were normal in NC-11βOHD. Baseline cortisol; cortisone; 11-deoxycortisol; 11-deoxycorticosterone and corticosterone concentrations; and 11-deoxycortisol/cortisol, 11-deoxycorticosterone/cortisol, and androstenedione/cortisol ratios were higher in C-11βOHD than NC-11βOHD patients (P < 0.05). The 11-deoxycortisol/cortisol ratio >2.2, <1.5, and <0.1 had 100% specificity to segregate C-11βOHD, NC-11βOHD, and control groups. CONCLUSION NC-11βOHD can escape from clinical attention due to relatively mild clinical presentation. However, steroid profiles enable the diagnosis, differential diagnosis, and subtyping of 11βOHD.
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Affiliation(s)
- Melek Yildiz
- Department of Pediatric Endocrinology, Kanuni Sultan Suleyman Training and Research Hospital, Istanbul, Turkey
- Department of Pediatric Endocrinology and Diabetes, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey
| | - Emregul Isik
- Clinics of Pediatric Endocrinology, Gaziantep Children's Hospital, Gaziantep, Turkey
| | - Zehra Yavas Abali
- Department of Pediatric Endocrinology and Diabetes, Marmara University, Faculty of Medicine, Istanbul, Turkey
| | - Mehmet Keskin
- Department of Pediatric Endocrinology and Diabetes, Gaziantep University, School of Medicine , Gaziantep, Turkey
| | - Mehmet Nuri Ozbek
- Department of Pediatric Endocrinology and Diabetes, SBU Diyarbakir Gazi Yasargil Education and Research Hospital, Diyarbakir, Turkey
| | - Firdevs Bas
- Department of Pediatric Endocrinology and Diabetes, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey
| | - Seyit Ahmet Ucakturk
- Department of Pediatric Endocrinology, Ankara City Hospital, Children's Hospital, Ankara, Turkey
| | - Muammer Buyukinan
- Department of Pediatric Endocrinology, Konya Training and Research Hospital, Konya, Turkey
| | - Hasan Onal
- Department of Pediatric Endocrinology, Kanuni Sultan Suleyman Training and Research Hospital, Istanbul, Turkey
| | - Cengiz Kara
- Department of Pediatrics, Division of Pediatric Endocrinology, Altinbas University, Faculty of Medicine, Istanbul, Turkey
| | - Karl-Heinz Storbeck
- Department of Biochemistry, Stellenbosch University, Stellenbosch, South Africa
| | - Feyza Darendeliler
- Department of Pediatric Endocrinology and Diabetes, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey
| | - Atilla Cayir
- Department of Pediatric Endocrinology and Diabetes, Erzurum Training and Research Hospital, Erzurum, Turkey
| | - Edip Unal
- Department of Pediatric Endocrinology and Diabetes, SBU Diyarbakir Gazi Yasargil Education and Research Hospital, Diyarbakir, Turkey
| | - Ahmet Anik
- Department of Pediatric Endocrinology and Diabetes, Adnan Menderes University, School of Medicine , Aydin, Turkey
| | - Huseyin Demirbilek
- Department of Pediatric Endocrinology and Diabetes, Hacettepe University, School of Medicine , Ankara, Turkey
| | - Tugba Cetin
- Department of Pediatric Endocrinology, Sanliurfa Training and Research Hospital, Sanliurfa, Turkey
| | - Fatma Dursun
- Department of Pediatric Endocrinology and Diabetes, Istanbul University of Health Science, Umraniye Training and Research Hospital, Istanbul, Turkey
| | - Gonul Catli
- Department of Pediatric Endocrinology, Izmir Katip Celebi University, School of Medicine , Izmir, Turkey
| | - Serap Turan
- Department of Pediatric Endocrinology and Diabetes, Marmara University, Faculty of Medicine, Istanbul, Turkey
| | - Henrik Falhammar
- Department of Endocrinology, Metabolism and Diabetes, Karolinska University Hospital, Stockholm, Sweden
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
| | - Tugba Baris
- Gelisim Genetik Tani Merkezi, Istanbul, Turkey
| | - Ali Yaman
- Department of Biochemistry, Marmara University, Faculty of Medicine, Istanbul, Turkey
| | - Goncagul Haklar
- Department of Biochemistry, Marmara University, Faculty of Medicine, Istanbul, Turkey
| | - Abdullah Bereket
- Department of Pediatric Endocrinology and Diabetes, Marmara University, Faculty of Medicine, Istanbul, Turkey
| | - Tulay Guran
- Department of Pediatric Endocrinology and Diabetes, Marmara University, Faculty of Medicine, Istanbul, Turkey
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12
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Dincer Yazan C, Ilgin C, Elbasan O, Apaydin T, Dashdamirova S, Yigit T, Sili U, Karahasan Yagci A, Sirikci O, Haklar G, Gozu H. The Association of Thyroid Hormone Changes with Inflammatory Status and Prognosis in COVID-19. Int J Endocrinol 2021; 2021:2395212. [PMID: 34422043 PMCID: PMC8371668 DOI: 10.1155/2021/2395212] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 07/24/2021] [Accepted: 08/06/2021] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND COVID-19 infection may have multiorgan effects in addition to effects on the lungs and immune system. Recently, studies have found thyroid function abnormalities in COVID-19 cases which were interpreted as euthyroid sick syndrome (ESS) or destructive thyroiditis. Therefore, in this study, we aimed to evaluate the thyroid function status and thyroid autoimmunity in COVID-19 patients. Material and Method. 205 patients were included. The medical history and laboratory parameters at admission were collected from medical records. Serum thyroid-stimulating hormone (TSH), free thyroxine (FT4), free triiodothyronine (FT3), thyroid peroxidase antibody, and thyroglobulin antibody were measured, and patients were classified according to thyroid function status. RESULTS 34.1% of the patients were euthyroid. Length of hospitalization (p < 0.001), rate of oxygen demand (p < 0.001), and intensive care unit (ICU) admission (p=0.022) were lower, and none of the euthyroid patients died. 108 (52.6%) patients were classified to have ESS, 57 were classified as mild, and 51 were moderate. The inflammatory parameters were higher in patients with moderate ESS. In cluster analysis, a high-risk group with a lower median FT3 value (median = 2.34 ng/L; IQR = 0.86), a higher median FT4 value (median = 1.04 ng/dL; IQR = 0.33), and a lower median TSH value (median = 0.62 mIU/L; IQR = 0.59) included 8 of 9 died patients and 25 of the 31 patients that were admitted to ICU. Discussion. Length of hospitalization, oxygen demand, ICU admission, and mortality were lower in euthyroid patients. Moreover, none of the euthyroid patients died. In conclusion, evaluation of thyroid function tests during COVID-19 infection may give information about the prognosis of disease.
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Affiliation(s)
- Ceyda Dincer Yazan
- Marmara University School of Medicine, Department of Endocrinology and Metabolism, Istanbul, Turkey
| | - Can Ilgin
- Marmara University School of Medicine, Department of Public Health, Istanbul, Turkey
| | - Onur Elbasan
- Marmara University School of Medicine, Department of Endocrinology and Metabolism, Istanbul, Turkey
| | - Tugce Apaydin
- Marmara University School of Medicine, Department of Endocrinology and Metabolism, Istanbul, Turkey
| | - Saida Dashdamirova
- Marmara University School of Medicine, Department of Endocrinology and Metabolism, Istanbul, Turkey
| | - Tayfun Yigit
- Marmara University School of Medicine, Department of Biochemistry, Istanbul, Turkey
| | - Uluhan Sili
- Marmara University School of Medicine, Department of Infectious Diseases and Clinical Microbiology, Istanbul, Turkey
| | | | - Onder Sirikci
- Marmara University School of Medicine, Department of Biochemistry, Istanbul, Turkey
| | - Goncagul Haklar
- Marmara University School of Medicine, Department of Biochemistry, Istanbul, Turkey
| | - Hulya Gozu
- Marmara University School of Medicine, Department of Endocrinology and Metabolism, Istanbul, Turkey
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13
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Bayramli R, Cevlik T, Guran T, Atay Z, Bas S, Haklar G, Bereket A, Turan S. Clinical Significance of Hypophosphatasemia in Children. Calcif Tissue Int 2020; 106:608-615. [PMID: 32088736 DOI: 10.1007/s00223-020-00677-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 11/06/2019] [Accepted: 02/11/2020] [Indexed: 11/29/2022]
Abstract
Low serum alkaline phosphatase (sALP)-hypophosphatasemia-is a characteristic of hypophosphatasia (HPP), but related to several clinical conditions. Here, we evaluated the frequency, persistency and the etiology of hypophosphatasemia in children. In retrospective analyses of sALP measurements from children, evaluated according to in-house constructed age- and sex-specific reference ranges, patients with no normal sALP measurement (Unresolved hypophosphatasemia) were invited for reanalysis. Prospectively, ALP substrates, pyridoxal-5-phosphate (PLP), and phosphoethanolamine (PEA) were measured in patients with persistent hypophosphatasemia. Radiographs and ALPL gene sequencing for HPP were performed to the cases with elevated PEA and/or PLP. From 130,340 sALP measurements of 93,162 patients, hypophosphatasemia was detected in 1404 samples from 867 patients (0.9%). Among them, 745 had at least one normal sALP values in laboratory records, grouped as transient hypophosphatasemia. 75 out of 122 patients with unresolved hypophosphatasemia could be reanalyzed for sALP, of whom PLP and PEA measurements were required in 37 due to persistent hypophosphatasemia. Both PEA and PLP were elevated in 4 patients, and ALPL gene analysis showed heterozygous mutations in 3 patients and homozygous in 1 patient. Elevated PEA with normal PLP were detected in 3 patients, and one had a heterozygous ALPL mutation. Anemia was the most common diagnosis, and upper respiratory tract infections and chronic diseases were more common in transient and unresolved hypophosphatasemia, respectively. In conclusion, reflected persistent hypophosphatasemia frequency was 1/1552 (0.06%) in this large pediatric cohort and, ALPL gene mutations were detected in 13.5% (5/37) of the studied cases. Although biochemical hypophosphatasemia is not uncommon, clinically significant HPP is rare.
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Affiliation(s)
- Rana Bayramli
- Division of Endocrinology, Department of Pediatrics, Marmara University School of Medicine, Istanbul, Turkey
| | - Tulay Cevlik
- Department of Biochemistry, Marmara University School of Medicine, Istanbul, Turkey
| | - Tulay Guran
- Division of Endocrinology, Department of Pediatrics, Marmara University School of Medicine, Istanbul, Turkey
| | - Zeynep Atay
- Division of Endocrinology, Department of Pediatrics, Marmara University School of Medicine, Istanbul, Turkey
| | - Serpil Bas
- Division of Endocrinology, Department of Pediatrics, Marmara University School of Medicine, Istanbul, Turkey
| | - Goncagul Haklar
- Department of Biochemistry, Marmara University School of Medicine, Istanbul, Turkey
| | - Abdullah Bereket
- Division of Endocrinology, Department of Pediatrics, Marmara University School of Medicine, Istanbul, Turkey
| | - Serap Turan
- Division of Endocrinology, Department of Pediatrics, Marmara University School of Medicine, Istanbul, Turkey.
- Pediatric Endocrinology and Diabetes, Marmara University Hospital, Fevzi Cakmak Mh., Muhsin Yazicioglu Cd.No 41, Ustkaynarca/Pendik, 34899, Istanbul, Turkey.
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14
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Guran T, Kara C, Yildiz M, Bitkin EC, Haklar G, Lin JC, Keskin M, Barnard L, Anik A, Catli G, Guven A, Kirel B, Tutunculer F, Onal H, Turan S, Akcay T, Atay Z, Yilmaz GC, Mamadova J, Akbarzade A, Sirikci O, Storbeck KH, Baris T, Chung BC, Bereket A. Revisiting Classical 3β-hydroxysteroid Dehydrogenase 2 Deficiency: Lessons from 31 Pediatric Cases. J Clin Endocrinol Metab 2020; 105:5707567. [PMID: 31950145 DOI: 10.1210/clinem/dgaa022] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [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: 09/15/2019] [Accepted: 01/13/2020] [Indexed: 02/10/2023]
Abstract
CONTEXT The clinical effects of classical 3β-hydroxysteroid dehydrogenase 2 (3βHSD2) deficiency are insufficiently defined due to a limited number of published cases. OBJECTIVE To evaluate an integrated steroid metabolome and the short- and long-term clinical features of 3βHSD2 deficiency. DESIGN Multicenter, cross-sectional study. SETTING Nine tertiary pediatric endocrinology clinics across Turkey. PATIENTS Children with clinical diagnosis of 3βHSD2 deficiency. MAIN OUTCOME MEASURES Clinical manifestations, genotype-phenotype-metabolomic relations. A structured questionnaire was used to evaluate the data of patients with clinical 3βHSD2 deficiency. Genetic analysis of HSD3B2 was performed using Sanger sequencing. Novel HSD3B2 mutations were studied in vitro. Nineteen plasma adrenal steroids were measured using LC-MS/MS. RESULTS Eleven homozygous HSD3B2 mutations (6 novel) were identified in 31 children (19 male/12 female; mean age: 6.6 ± 5.1 yrs). The patients with homozygous pathogenic HSD3B2 missense variants of > 5% of wild type 3βHSD2 activity in vitro had a non-salt-losing clinical phenotype. Ambiguous genitalia was an invariable feature of all genetic males, whereas only 1 of 12 female patients presented with virilized genitalia. Premature pubarche was observed in 78% of patients. In adolescence, menstrual irregularities and polycystic ovaries in females and adrenal rest tumors and gonadal failure in males were observed. CONCLUSIONS Genetically-documented 3βHSD2 deficiency includes salt-losing and non-salt-losing clinical phenotypes. Spared mineralocorticoid function and unvirilized genitalia in females may lead to misdiagnosis and underestimation of the frequency of 3βHSD2 deficiency. High baseline 17OHPreg to cortisol ratio and low 11-oxyandrogen concentrations by LC-MS/MS unequivocally identifies patients with 3βHSD2 deficiency.
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Affiliation(s)
- Tulay Guran
- Department of Pediatric Endocrinology and Diabetes, School of Medicine, Marmara University, Istanbul, Turkey
| | - Cengiz Kara
- Department of Pediatric Endocrinology and Diabetes, Ondokuz Mayis University, Samsun, Turkey
| | - Melek Yildiz
- Department of Pediatric Endocrinology and Diabetes, Kanuni Sultan Suleyman Training and Research Hospital, Istanbul, Turkey
| | - Eda C Bitkin
- Department of Pediatric Endocrinology and Diabetes, Ondokuz Mayis University, Samsun, Turkey
| | - Goncagul Haklar
- Department of Biochemistry, School of Medicine, Marmara University, Istanbul, Turkey
| | - Jen-Chieh Lin
- Institute of Molecular Biology, Academia Sinica, Taipei, Taiwan
| | - Mehmet Keskin
- Department of Pediatric Endocrinology and Diabetes, Gaziantep University, Gaziantep, Turkey
| | - Lise Barnard
- Department of Biochemistry, Stellenbosch University, Western Cape, South Africa
| | - Ahmet Anik
- Department of Pediatric Endocrinology and Diabetes, School of Medicine, Aydin Adnan Menderes University, Aydin, Turkey
| | - Gonul Catli
- Department of Pediatric Endocrinology and Diabetes, School of Medicine, Katip Celebi University, Izmir, Turkey
| | - Ayla Guven
- Pediatric Endocrinology, Health Science University, Faculty of Medicine, Zeynep Kamil Women and Children Diseases Education and Research Hospital, Istanbul, Turkey
| | - Birgul Kirel
- Department of Pediatric Endocrinology, Eskisehir Osmangazi University, Eskisehir, Turkey
| | - Filiz Tutunculer
- Department of Pediatrics, Division of Pediatric Endocrinology, Trakya University School of Medicine, Edirne, Turkey
| | - Hasan Onal
- Department of Pediatric Endocrinology and Diabetes, Kanuni Sultan Suleyman Training and Research Hospital, Istanbul, Turkey
| | - Serap Turan
- Department of Pediatric Endocrinology and Diabetes, School of Medicine, Marmara University, Istanbul, Turkey
| | - Teoman Akcay
- Department of Pediatric Endocrinology and Diabetes, Istinye University Medical Park Gaziosmanpasa Hospital, Istanbul, Turkey
| | - Zeynep Atay
- Department of Pediatric Endocrinology and Diabetes, School of Medicine, Marmara University, Istanbul, Turkey
| | - Gulay C Yilmaz
- Department of Pediatric Endocrinology and Diabetes, Ondokuz Mayis University, Samsun, Turkey
| | - Jamala Mamadova
- Department of Pediatric Endocrinology and Diabetes, Ondokuz Mayis University, Samsun, Turkey
| | - Azad Akbarzade
- Department of Pediatric Endocrinology and Diabetes, School of Medicine, Marmara University, Istanbul, Turkey
| | - Onder Sirikci
- Department of Biochemistry, School of Medicine, Marmara University, Istanbul, Turkey
| | - Karl-Heinz Storbeck
- Department of Biochemistry, Stellenbosch University, Western Cape, South Africa
| | - Tugba Baris
- Gelisim Genetik Tani Merkezi, Istanbul, Turkey
| | - Bon-Chu Chung
- Institute of Molecular Biology, Academia Sinica, Taipei, Taiwan
| | - Abdullah Bereket
- Department of Pediatric Endocrinology and Diabetes, School of Medicine, Marmara University, Istanbul, Turkey
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15
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Sunter G, Enver EO, Akbarzade A, Turan S, Vatansever P, Gunal DI, Haklar G, Bereket A, Agan K, Guran T. Acquired modification of sphingosine-1-phosphate lyase activity is not related to adrenal insufficiency. BMC Neurol 2018; 18:48. [PMID: 29685115 PMCID: PMC5911956 DOI: 10.1186/s12883-018-1049-9] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2017] [Accepted: 04/16/2018] [Indexed: 12/02/2022] Open
Abstract
Background Congenital sphingosine-1-phosphate (S1P) lyase deficiency due to biallelic mutations in SGPL1 gene has recently been described in association with primary adrenal insufficiency and steroid-resistant nephrotic syndrome. S1P lyase, on the other hand, is therapeutically inhibited by fingolimod which is an oral drug for relapsing multiple sclerosis (MS). Effects of this treatment on adrenal function has not yet been evaluated. We aimed to test adrenal function of MS patients receiving long-term fingolimod treatment. Methods Nineteen patients (14 women) with MS receiving oral fingolimod (Gilenya®, Novartis) therapy were included. Median age was 34.2 years (range; 21.3–44.6 years). Median duration of fingolimod treatment was 32 months (range; 6–52 months) at a dose of 0.5 mg/day. Basal and ACTH-stimulated adrenal steroid measurements were evaluated simultaneously employing LC-MS/MS based steroid panel. Basal steroid concentrations were also compared to that of sex- and age-matched healthy subjects. Cortisol and 11-deoxycortisol, 11-deoxycorticosterone and dehydroepiandrosterone were used to assess glucocorticoid, mineralocorticoid and sex steroid producing pathways, respectively. Results Basal ACTH concentrations of the patients were 20.8 pg/mL (6.8–37.8 pg/mL) (normal range; 5–65 pg/mL). There was no significant difference in the basal concentrations of cortisol, 11-deoxycortisol, 11-deoxycorticosterone and dehydroepiandrosterone between patients and controls (p = 0.11, 0.058, 0.74, 0.15; respectively). All patients showed adequate cortisol response to 250 mcg IV ACTH stimulation (243 ng/mL, range; 197–362 ng/mL). There was no significant correlation between duration of fingolimod treatment and basal or ACTH-stimulated cortisol or change in cortisol concentrations during ACTH stimulation test (p = 0.57, 0.66 and 0.21, respectively). Conclusion Modification and inhibition of S1P lyase activity by the long-term therapeutic use of fingolimod is not associated with adrenal insufficiency in adult patients with MS. This suggests that S1P lyase has potentially a critical role on adrenal development rather than the function of a fully mature adrenal gland.
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Affiliation(s)
- Gulin Sunter
- Department of Neurology, Marmara University, Istanbul, Turkey
| | - Ece Oge Enver
- Department of Paediatric Endocrinology and Diabetes, Marmara University, Fevzi Cakmak Mh. Mimar Sinan Cd.No 41., Ustkaynarca/Pendik, 34899, Istanbul, Turkey
| | - Azad Akbarzade
- Department of Paediatric Endocrinology and Diabetes, Marmara University, Fevzi Cakmak Mh. Mimar Sinan Cd.No 41., Ustkaynarca/Pendik, 34899, Istanbul, Turkey
| | - Serap Turan
- Department of Paediatric Endocrinology and Diabetes, Marmara University, Fevzi Cakmak Mh. Mimar Sinan Cd.No 41., Ustkaynarca/Pendik, 34899, Istanbul, Turkey
| | - Pinar Vatansever
- Department of Biochemistry, Marmara University, Istanbul, Turkey
| | | | - Goncagul Haklar
- Department of Biochemistry, Marmara University, Istanbul, Turkey
| | - Abdullah Bereket
- Department of Paediatric Endocrinology and Diabetes, Marmara University, Fevzi Cakmak Mh. Mimar Sinan Cd.No 41., Ustkaynarca/Pendik, 34899, Istanbul, Turkey
| | - Kadriye Agan
- Department of Neurology, Marmara University, Istanbul, Turkey
| | - Tulay Guran
- Department of Paediatric Endocrinology and Diabetes, Marmara University, Fevzi Cakmak Mh. Mimar Sinan Cd.No 41., Ustkaynarca/Pendik, 34899, Istanbul, Turkey.
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16
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Kirac D, Dincer Yazan C, Gezmis H, Yaman A, Haklar G, Sirikci O, Altunok EC, Deyneli O. VDBP, VDR Mutations and Other Factors Related With Vitamin D Metabolism May Be Associated With Type 1 Diabetes Mellitus. Cell Mol Biol (Noisy-le-grand) 2018; 64:11-16. [PMID: 29506625] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 02/06/2018] [Accepted: 02/06/2018] [Indexed: 06/08/2023]
Abstract
Type 1 diabetes mellitus (T1DM) is an insulin dependent autoimmune disorder resulting the progressive destruction of pancreatic beta cells. Another possible factor considered to be related with T1DM is vitamin D deficiency. Therefore in this study it was aimed to investigate the associations between T1DM, vitamin D binding protein (VDBP) and vitamin D receptor (VDR) gene mutations which are related with vitamin D metabolism. Fifty five T1DM paitents and 40 healthy volunteers were recruited to the study. FokI (rs2228570), BsmI (rs1544410) mutations in VDR; rs4588 and rs7041 polymorphisms in VDBP were investigated with real-time polymerase chain reaction (RT-PCR). Other risk factors related with T1DM were also investigated. Results were evaluated statistically. Statistically significant relations were found in glucose, HbA1c, TSH, higher 25[OH]D, free vitamin D, calcium, albumin, log25[OH]D, retinopathy, higher than 30 mg/day microalbuminuria in T1DM patients. Also statistically significant association was found between C allele in Fok1 and T1DM in patients. When the relation between the risk factors and mutations were investigated, it was found that VDBP, free vitamin D and bioactive vitamin D were significantly associated with rs7041 mutation in VDBP whereas HDL was significantly associated with rs2228570 mutation in VDR. Other studies with larger data sets may demonstrate more reliable statistical results to rule out genotype-phenotype correlations of the disease.
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Affiliation(s)
| | | | | | - Ali Yaman
- Marmara University, Faculty of Medicine
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Gokdemir Y, Vatansever P, Karadag B, Seyrekel T, Baykan O, Bas Ikızoglu N, Ersu R, Karakoc F, Haklar G. Performance Evaluation of a New Coulometric Endpoint Method in Sweat Testing and Its Comparison With Classic Gibson&Cooke and Chloridometer Methods in Cystic Fibrosis. Front Pediatr 2018; 6:133. [PMID: 29876336 PMCID: PMC5974533 DOI: 10.3389/fped.2018.00133] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Accepted: 04/19/2018] [Indexed: 11/13/2022] Open
Abstract
Background: The objective of the study was to assess the diagnostic efficacy of the coulometric endpoint method and compare it with classic Gibson&Cooke and chloridometer methods. Methods: This study is a prospective clinical study comparing two conventional sweat testing methods with the coulometric endpoint method in previously diagnosed cystic fibrosis (CF) patients and a non-CF control group. All individuals underwent two simultaneous sweat collections. One sample of sweat, collected by the CFΔ collector coil system, was analyzed by two methods: the titrimetric Cl- measurement (Sherwood® Chloridometer 926S, Sherwood Scientific Ltd., Cambridge, UK) and the coulometric endpoint method (CF Δ Collection System®, UTSAT/Turkey); the second sample was collected from the other forearm by the Gibson&Cooke method and the collected sweat was analyzed by manual titration in accordance with the Schales&Schales method. Within-run and between-run imprecisions were evaluated via Cl- concentrations of 40, 70, and 130 mmol/L samples. Results: One hundred and seventy (60 CF and 110 controls) subjects were included in the study. All three sweat test methods discriminated CF subjects from the healthy individuals. The mean difference between the coulometric endpoint and titrimetric Cl- measurement methods was -1.5 mmol/L, (95% confidence limits of agreement, ranging from -8.9 to 15.9 mmol/L); the mean difference between manual titration vs. coulometric endpoint methods was 12.8 mmol/L, (95% confidence limits of agreement ranging from -9.7 to 45.3 mmol/L) and the mean difference between the manual titration and titrimetric Cl- measurement methods was 11.3 mmol/L, (95% confidence limits of agreement ranging from -7.8 to 40.5 mmol/L) based on a Bland-Altman analysis. In the Receiver operating characteristic (ROC) analysis, made on the basis that Cl- concentration values < 40 mmol/L exclude the CF diagnosis, the coulometric endpoint method resulted in 96.7% sensitivity and 100% specificity for a cut-off value of 58.5 mmol/L (AUC: 0.994; 95% CI = 0.986-1.000; p < 0.001). Conclusions: The coulometric endpoint method can be as reliable as quantitative sweat Cl- analysis and may be considered as a definitive diagnostic tool for CF.
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Affiliation(s)
- Yasemin Gokdemir
- Department of Pediatric Pulmonology, School of Medicine, Marmara University, Istanbul, Turkey
| | - Pinar Vatansever
- Department of Biochemistry, School of Medicine, Marmara University, Istanbul, Turkey
| | - Bulent Karadag
- Department of Pediatric Pulmonology, School of Medicine, Marmara University, Istanbul, Turkey
| | - Tuncay Seyrekel
- Biochemistry Laboratory, Yozgat City Hospital, Yozgat, Turkey
| | - Ozgur Baykan
- Biochemistry Laboratory, Ataturk State Hospital, Balikesir, Turkey
| | - Nilay Bas Ikızoglu
- Department of Pediatric Pulmonology, School of Medicine, Marmara University, Istanbul, Turkey
| | - Refika Ersu
- Department of Pediatric Pulmonology, School of Medicine, Marmara University, Istanbul, Turkey
| | - Fazilet Karakoc
- Department of Pediatric Pulmonology, School of Medicine, Marmara University, Istanbul, Turkey
| | - Goncagul Haklar
- Department of Biochemistry, School of Medicine, Marmara University, Istanbul, Turkey
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Yaman A, Gerin F, Baykan O, Sirikci O, Haklar G. You Should Have the Same Area Counts. J Appl Lab Med 2017; 1:767-770. [DOI: 10.1373/jalm.2016.022079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2016] [Accepted: 12/05/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Ali Yaman
- School of Medicine, Marmara University, Istanbul, Turkey
| | | | | | - Onder Sirikci
- School of Medicine, Marmara University, Istanbul, Turkey
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Baykan O, Yaman A, Gerin F, Sirikci O, Haklar G. The effect of different protease inhibitors on stability of parathyroid hormone, insulin, and prolactin levels under different lag times and storage conditions until analysis. J Clin Lab Anal 2017; 31. [PMID: 28133791 DOI: 10.1002/jcla.22144] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Accepted: 12/19/2016] [Indexed: 11/06/2022] Open
Abstract
INTRODUCTION Proteolytic cleavage through proteases affects peptide hormone levels, which is of particular significance when the time interval between sampling and analysis is prolonged. We evaluated the stability of parathyroid hormone, insulin, and prolactin molecules (i) with different protease inhibitors such as K2 EDTA, aprotinin, and protease inhibitor cocktail (PIC), (ii) with different lag times (6-72 hours), and (iii) under different storage temperatures (4°C vs room temperature [RT]) until analysis. MATERIALS AND METHODS Blood samples were collected into 2 sets of 5 Vacutainer® tubes (Becton Dickinson) from 10 healthy adults. Tubes 1 and 2 were plain gel separator tubes. Tubes 3, 4, and 5 contained PIC (1%), aprotinin (500 KIU/mL), and K2 EDTA, respectively. After centrifugation at 1300 g for 10 minutes, PIC added to tube 2 of each set. Samples were analyzed and then one set was stored at 4°C, whereas the other at RT until analysis at 6, 24, 48, and 72 hours. Hormone levels were determined with electrochemiluminescence immunoassay (ModularE170; Roche Diagnostics). The results were compared with desirable bias limits (DBL) from Westgard QC database. RESULTS Insulin at RT decreases exceeding the DBL starting from 24 hours and K2 EDTA preserved insulin. PTH exceeded the DBL at RT for 48 hours or longer and PIC addition after centrifugation inhibited its degradation. Prolactin remained stable in all tested conditions. All parameters in the plain gel separator tubes remained within DBL when stored at 4°C until 72 hours. CONCLUSIONS Different proteases may degrade peptide hormones and measures should be taken to counteract these effects especially if there is a delay before analysis.
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Affiliation(s)
- Ozgur Baykan
- Clinical Biochemistry, Ataturk State Hospital, Balikesir, Turkey
| | - Ali Yaman
- Clinical Biochemistry, Marmara University School of Medicine, Istanbul, Turkey
| | - Fethullah Gerin
- Clinical Biochemistry, Central Laboratory of Public Health, Istanbul, Turkey
| | - Onder Sirikci
- Clinical Biochemistry, Marmara University School of Medicine, Istanbul, Turkey
| | - Goncagul Haklar
- Clinical Biochemistry, Marmara University School of Medicine, Istanbul, Turkey
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Sozen-Delil F, Cekic O, Haklar G. Vitreous and serum Hsp 70 levels in rhegmatogenous retinal detachment. Acta Ophthalmol 2016. [DOI: 10.1111/j.1755-3768.2016.0658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Sozen-Delil F, Cekic O, Haklar G. Vitreous and serum VEGF levels after intravitreal injection of bevacizumab, ranibizumab and triamcinolone acetonide in patients with proliferative diabetic retinopathy. Acta Ophthalmol 2016. [DOI: 10.1111/j.1755-3768.2016.0647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Boran P, Yildirim S, Karakoc-Aydiner E, Ogulur I, Ozen A, Haklar G, Koc A, Akkoc T, Barlan I. Vitamin B12 deficiency among asymptomatic healthy infants: its impact on the immune system. Minerva Pediatr (Torino) 2016; 73:59-66. [PMID: 26763692 DOI: 10.23736/s2724-5276.16.04274-x] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND The immunomodulatory effects of vitamin B12 deficiency in children have not yet been established in the literature. In the current study, the effects of vitamin B12 on the immune system in asymptomatic and otherwise healthy infants have been studied. METHODS The study was conducted at Marmara University, "well-child" outpatient clinic. Vitamin B12 level was measured in a cohort of 611 healthy term infants, followed regularly for at least 6 months. Immunoglobulin measurements, lymphocyte subset analysis, cytokine production analysis, lymphocyte proliferation assays and evaluation of lymphocyte apoptosis were performed in a subset of 60 infants. RESULTS In this cohort, one out of three babies displayed vitamin B12 deficiency. The percentage of CD4+CD25+ regulatory T cells (Tregs) was lower in vitamin B12 deficient babies than in controls. Although the percentage of Tregs increased after treatment, the change was not significant. There was no difference of cytokine levels between vitamin B12 deficient and control groups. However, proinflammatory cytokines were reduced after treatment. No significant difference was observed for immunoglobulins, early apoptosis and lymphocyte proliferation. CONCLUSIONS Vitamin B12 deficiency is an underestimated health problem among the developing countries. The clinical consequences of the decreased percentage of Tregs associated with vitamin B12 deficiency, and reduction of proinflammatory cytokines after vitamin supplementation needs to be further studied, especially in terms of emerging allergies, autoimmune disorders and anti-inflammatory effects.
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Affiliation(s)
- Perran Boran
- Division of Social Pediatrics, Department of Pediatrics, Faculty of Medicine, Marmara University, Istanbul, Turkey -
| | - Selin Yildirim
- Division of Pediatric Allergy and Immunology, Department of Pediatrics, Faculty of Medicine, Marmara University, Istanbul, Turkey
| | - Elif Karakoc-Aydiner
- Division of Pediatric Allergy and Immunology, Department of Pediatrics, Faculty of Medicine, Marmara University, Istanbul, Turkey
| | - Ismail Ogulur
- Division of Pediatric Allergy and Immunology, Department of Pediatrics, Faculty of Medicine, Marmara University, Istanbul, Turkey
| | - Ahmet Ozen
- Division of Pediatric Allergy and Immunology, Department of Pediatrics, Faculty of Medicine, Marmara University, Istanbul, Turkey
| | - Goncagul Haklar
- Department of Biochemistry, Faculty of Medicine, Marmara University, Istanbul, Turkey
| | - Ahmet Koc
- Division of Pediatric Hematology, Department of Pediatrics, Faculty of Medicine, Marmara University, Istanbul, Turkey
| | - Tunc Akkoc
- Division of Pediatric Allergy and Immunology, Department of Pediatrics, Faculty of Medicine, Marmara University, Istanbul, Turkey
| | - Isil Barlan
- Division of Pediatric Allergy and Immunology, Department of Pediatrics, Faculty of Medicine, Marmara University, Istanbul, Turkey
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Alibaz-Oner F, Asmaz-Haliloglu Ö, Gogas-Yavuz D, Can M, Haklar G, Direskeneli H. Vitamin D Levels in Takayasu's Arteritis and a Review of the Literature on Vasculitides. J Clin Lab Anal 2015; 30:529-33. [PMID: 26661754 DOI: 10.1002/jcla.21898] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2014] [Revised: 08/13/2015] [Accepted: 08/27/2015] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE Takayasu's arteritis (TAK) is a chronic, large-vessel vasculitis. Vitamin D, as a steroidal hormone, has recently been shown to have immunoregulatory and immunosuppressive effects. Low vitamin D levels are demonstrated in various autoimmune disorders. The aim of this study is to investigate vitamin D levels in patients with TAK. A comprehensive review of vitamin D levels in systemic vasculitides (SVs) is also performed. METHODS The study included 36 patients with TAK, 28 patients with Behçet's disease (BD) as disease control and 30 sex-matched healthy controls. Plasma 25-hydroxy vitamin D (25(OH) vit D) levels were measured with high-performance liquid chromatography. "Deficiency" was defined as 25(OH) vit D levels below 25 nmol/l and "insufficiency" as below 50 nmol/l. RESULTS Plasma 25(OH) vit D levels were significantly lower in TAK patients (16.93 ± 10.62 nmol/l) than healthy controls (64.63 ± 21.82 nmol/l). Vitamin D level in BD patients (38.8 ± 20.9 nmol/l) is lower than healthy controls but higher than TAK patients. The frequency of vitamin D deficiency was 83.3% in patients with TAK compared to 3.3% in healthy controls. Plasma 25(OH) vit D levels were same between clinically active and inactive patients. In literature review, very few studies were found to investigate vitamin D in SVs. CONCLUSION We observed a high prevalence of vitamin D deficiency in patients with TAK. As various immune effects of vitamin D on mononuclear cells and arterial endothelium is shown, vitamin D deficiency can be a predisposing factor for immune activation in SV. We therefore suggest monitorization and replacement of vitamin D status in all TAK and other SV patients.
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Affiliation(s)
- Fatma Alibaz-Oner
- Department of Rheumatology, School of Medicine, Marmara University, Istanbul, Turkey.
| | - Özlem Asmaz-Haliloglu
- Department of Internal Medicine, School of Medicine, Marmara University, Istanbul, Turkey
| | - Dilek Gogas-Yavuz
- Department of Endocrinology, School of Medicine, Marmara University, Istanbul, Turkey
| | - Meryem Can
- Department of Rheumatology, School of Medicine, Marmara University, Istanbul, Turkey
| | - Goncagul Haklar
- Department of Biochemistry, School of Medicine, Marmara University, Istanbul, Turkey
| | - Haner Direskeneli
- Department of Rheumatology, School of Medicine, Marmara University, Istanbul, Turkey
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Affiliation(s)
| | - Ali Yaman
- Department of Biochemistry, School of Medicine, Marmara University, Istanbul, Turkey
| | - Ozgur Baykan
- Department of Biochemistry, School of Medicine, Marmara University, Istanbul, Turkey
| | - Onder Sirikci
- Department of Biochemistry, School of Medicine, Marmara University, Istanbul, Turkey
| | - Goncagul Haklar
- Department of Biochemistry, School of Medicine, Marmara University, Istanbul, Turkey
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Can M, Eren R, Baykan O, Asmaz-Haliloglu O, Gogas-Yavuz D, Haklar G, Direskeneli H. AB0582 Effect of Vitamin D Deficiency and Replacement on Endothelial Functions in Familial Mediterrenean Fever. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.5994] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Yalindag-Ozturk N, İncekoy Girgin F, Erkek N, Haklar G. A rare case of hypermagnesemia with unclear etiology and symptomatology in a septic infant with brain tumor. Clin Biochem 2014. [DOI: 10.1016/j.clinbiochem.2014.04.079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Yenice O, Cerman E, Ashour A, Firat R, Haklar G, Sirikci O, Akman I, Kazokoglu H. Serum erythropoietin, insulin-like growth factor 1, and vascular endothelial growth factor in etiopathogenesis of retinopathy of prematurity. Ophthalmic Surg Lasers Imaging Retina 2014; 44:549-54. [PMID: 24221462 DOI: 10.3928/23258160-20131105-05] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Accepted: 07/18/2013] [Indexed: 12/13/2022]
Abstract
BACKGROUND AND OBJECTIVE The role of growth factors in the pathogenesis of retinopathy of prematurity (ROP) is known. To better understand this issue, the authors investigated vascular endothelial growth factor (VEGF), insulin-like growth factor 1 (IGF-1), and erythropoietin (EPO) levels in the cord blood of premature newborns. PATIENTS AND METHODS IGF-1, VEGF, and EPO levels were measured in cord blood samples obtained from 93 infants less than 32 weeks of gestational age at birth, and their predictive value in the development of ROP was investigated. RESULTS The mean birth age and mean birth weight were 32.2 ± 1.5 weeks and 1,678 ± 326 g, respectively, in infants without ROP and 29.6 ± 2.3 weeks and 1,384 ± 343 g, respectively, in infants with ROP. Multivariate logistic regression analysis showed that only the gestational age and the serum VEGF at birth were independently associated with the risk of developing ROP (P = .002, Exp[B] = 0.514, CI = 95%: 0.341-0.775; P = .028, Exp[B] = 0.999, CI = 95%: 0.997-1.00). CONCLUSION Serum VEGF levels at birth were lower in infants who later developed ROP. This may have a predictive value for ROP and contribute to the pathogenesis, because affected infants may be more susceptible to extrauterine hyperoxic insult.
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Gerin F, Ramazan DC, Baykan O, Sirikci O, Haklar G. Abnormal gel flotation in a patient with apperant pneumonia diagnosis: a case report. Biochem Med (Zagreb) 2014; 24:180-2. [PMID: 24627728 PMCID: PMC3936981 DOI: 10.11613/bm.2014.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [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: 10/24/2013] [Accepted: 01/15/2014] [Indexed: 11/16/2022] Open
Abstract
Introduction: Serum blood collection tubes with separator gel are widely used by many laboratories for chemistry analyses. We describe a case of a primary blood collection tube filled with blood sample and a floating separator gel. Materials and methods: The blood sample was collected from a 51 years old female in intensive care unit with the diagnosis of pneumonia into a BD Vacutainer SST tube (Becton Dickinson, NJ, USA) containing serum separator gel and conveyed to the core laboratory of Marmara University Hospital within 30 minutes from collection. Sample was immediately centrifuged at room temperature at 1500 × g for 10 minutes. Results: The analyses revealed a highly increased total protein concentration of 145 g/L (reference interval 64–83 g/L). The nephelometric analyses showed an elevated serum IgG concentration of 108 g/L (reference interval 6.5–16 g/L) and IgG lambda monoclonal band was determined by serum immunofixation electrophoresis. Conclusion: Limitation of the separator gel tubes in patients with a high plasma density and its possible effects on test results and laboratory costs should be remembered. The clinical diagnosis stated in the information system should also reveal known comorbid conditions besides the apparent admission reason. This information would avoid resampling, additional testing, and communication efforts with the clinicians.
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Affiliation(s)
- Fethullah Gerin
- Department of Biochemistry, School of Medicine, Marmara University, Istanbul, Turkey
| | - Dilber Coban Ramazan
- Department of Biochemistry, School of Medicine, Marmara University, Istanbul, Turkey
| | - Ozgur Baykan
- Department of Biochemistry, School of Medicine, Marmara University, Istanbul, Turkey
| | - Onder Sirikci
- Department of Biochemistry, School of Medicine, Marmara University, Istanbul, Turkey
| | - Goncagul Haklar
- Department of Biochemistry, School of Medicine, Marmara University, Istanbul, Turkey
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Can M, Gunes M, Haliloglu OA, Haklar G, Inanç N, Yavuz DG, Direskeneli H. Effect of vitamin D deficiency and replacement on endothelial functions in Behçet's disease. Clin Exp Rheumatol 2012; 30:S57-S61. [PMID: 23020973] [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] [Received: 03/12/2012] [Accepted: 08/29/2012] [Indexed: 06/01/2023]
Abstract
OBJECTIVES Endothelial dysfunction is previously demonstrated in Behçet's disease (BD) and vitamin D is implicated to affect endothelial functions. We aimed to evaluate the status of serum 25(OH)Vit D3 levels and its association with disease activity, endothelial function and carotis intima media thickness (CIMT) in patients with BD. METHODS Thirty-six BD (F/M: 22/14, mean age: 39.6 years) patients and 51 healthy controls (F/M: 28/23, mean age: 34.5 years) were studied. Rheumatoid arthritis (RA) (n=33) patients (F/M: 26/7, mean age: 50.82 years) were also enrolled, as a disease control group. Endothelial function was evaluated by brachial artery flow mediated dilatation (FMD) and CIMT with B-Mode ultrasound. The vitamin D-deficient BD patients received 1000 IU Vitamin D3 daily for 3 months. RESULTS Less than 50 nmol/L levels of 25(OH) Vit D3 were present in 61.1% (n=22) of BD and 35.3% (n=18) of HC (serum 25(OH)Vit D3 levels: BD: 44.5 (9-112) vs HC: 56 (14-125) nmol/lt, p=0.01). CIMT and FMD were also significantly different between BD and HC [0.56 (0.35-9.26) vs. 0.39 (0-0.52) and 5.20 (0.56-30.58) vs. 9.04 (-6.9-34.17), p=0.001 and p=0.02, respectively]. However, no correlation was observed between 25(OH)VitD3 levels and CIMT or FMD (r=0.6, p=0.7 and r=0.03, p=0.8, respectively) at baseline. CIMT measurements improved after replacement therapy (0.56 vs. 0.49, p=0.02), FMD measurements also improved, but not reaching statistical significance (5.2 vs. 8.28, p=0.06). CONCLUSIONS A high presence of vitamin D deficiency was observed in BD patients from Turkey and replacement of vitamin D had favourable effects on endothelial function.
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Affiliation(s)
- M Can
- Department of Rheumatology, Marmara University, Pendik Training and Research Hospital, Istanbul, Turkey.
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Akcay T, Turan S, Guran T, Unluguzel G, Haklar G, Bereket A. T4 plus T3 treatment in children with hypothyroidism and inappropriately elevated thyroid-stimulating hormone despite euthyroidism on T4 treatment. Horm Res Paediatr 2010; 73:108-14. [PMID: 20190547 DOI: 10.1159/000277627] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [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: 07/02/2008] [Accepted: 02/10/2009] [Indexed: 11/19/2022] Open
Abstract
AIMS To evaluate the effect of addition of T3 to L-T4 treatment in children with congenital hypothyroidism (CH) who have inappropriately elevated thyroid-stimulating hormone (TSH) levels despite high normal serum T4 levels on L-T4 treatment. METHODS Ten children (age 7.1 +/- 2 years) with CH whose TSH levels were persistently high despite euthyroidism and can only be normalized with hyperthyroidism were included. L-T4 treatment was switched to T3+L-T4 combination (Bitiron(R) tablet 50 mug L-T4 + 12.5 mug triiodothyronine). The patients received 50% of their usual L-T4 dose as L-T4 and the remaining half as T3 in a 4:1 ratio. The dose of T3+L-T4 was titrated to achieve normal TSH levels. Thyroid hormones and biochemical markers were followed for 1 year. RESULTS Euthyrotropinemia was achieved at the 7th month (mean) of combination (T3+L-T4) treatment. Serum T4 and fT4 were lower and T3 was higher during combination compared to L-T4 treatment. LDL-cholesterol decreased and ALP increased in the euthyrotropinemic state. Vital signs were similar at hyperthyrotropinemia and euthyrotropinemia. CONCLUSION T3+L-T4 treatment provides euthyrotropinemia without causing hyperthyroidism in children with CH and inappropriate hyperthyrotropinemia. Our data strongly suggest that decreased negative feedback due to lower T3 levels at the pituitary level is the main reason for persistent hyperthyrotropinemia.
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Affiliation(s)
- Teoman Akcay
- Department of Pediatrics, Division of Pediatric Endocrinology, Marmara University, Istanbul, Turkey.
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Toprak A, Erenus M, Ilhan AH, Haklar G, Fak AS, Oktay A. The effect of postmenopausal hormone therapy with or without folic acid supplementation on serum homocysteine level. Climacteric 2009; 8:279-86. [PMID: 16390760 DOI: 10.1080/13697130500191040] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [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: 10/25/2022]
Abstract
OBJECTIVE To evaluate the effects of postmenopausal hormone therapy (HT) with or without the addition of folic acid (FA) on serum homocysteine levels in a randomized, placebo-controlled design. Additionally, a non-randomized control group with no treatment was included. METHODS Forty non-hysterectomized healthy postmenopausal women were randomly allocated to receive either oral continuous combined HT (0.625 mg conjugated equine estrogen with 2.5 mg medroxyprogesterone acetate daily) and oral folic acid (5 mg/day, n = 20) or HT and placebo (n = 20) for 3 months. A control group (n = 15) did not receive any study medication and was followed in the same manner. The fasting total serum homocysteine level was measured by fluorescence polarization immunoassay with a sensitivity of < 0.5 micromol/l. Serum levels of folate, estrogen and lipid profile were also followed. RESULTS The mean age of the postmenopausal women was 52 +/- 6 years. Baseline homocysteine level was the highest in the HT + FA group (9.96 +/- 2.82 micromol/l), compared to HT + placebo (9.64 +/- 1.89 micromol/l) and control groups (9.01 +/- 1.83 micromol/l) (ANCOVA, p = 0.022). Low baseline folate and vitamin B12 levels contributed significantly to the high level of baseline homocysteine in the HT + FA group. The addition of FA to HT led to a significant decrease in the serum homocysteine level from the baseline level of 9.96 +/- 2.82 micromol/l to the final level of 8.92 +/- 2.53 micromol/l (p = 0.023). On the other hand, HT alone (HT + placebo group) significantly increased the serum homocysteine level from 9.64 +/- 1.89 micromol/l to 10.22 +/- 1.77 micromol/l without a decline in serum folate level (p = 0.045). The serum homocysteine level in the control group did not change significantly (from 9.01 +/- 1.83 micromol/l to 9.58 +/- 2.05 micromol/l, p = 0.29). CONCLUSIONS Three months of oral continuous combined HT increased the fasting total serum homocysteine level without affecting the serum folate level. Lowering the homocysteine level in postmenopausal woman on HT is achievable by folic acid supplementation.
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Affiliation(s)
- A Toprak
- Department of Cardiology, Marmara University School of Medicine, Istanbul, Turkey
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Uyan Z, Unluguzel G, Haklar G, Cakir E, Oktem S, Ersu R, Karadag B, Karakoc F, Dagli E. The effect of inhaled steroids on bronchial hyperreactivity, oxidative status clinical and inflammatory parameters in patients with cystic fibrosis. J Cyst Fibros 2008. [DOI: 10.1016/s1569-1993(08)60262-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Tutar E, Ertem D, Unluguzel G, Tanrikulu S, Haklar G, Celikel C, Ademoglu E, Pehlivanoglu E. Reactive oxygen species and chemokines: Are they elevated in the esophageal mucosa of children with gastroesophageal reflux disease? World J Gastroenterol 2008; 14:3218-23. [PMID: 18506929 PMCID: PMC2712856 DOI: 10.3748/wjg.14.3218] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To determine the role of inflammatory cytokines and reactive oxygen species (ROS) in childhood reflux esophagitis.
METHODS: A total of 59 subjects who had complaints suggesting GERD underwent esophagogastroduodenoscopy. Endoscopic and histopathologic diagnosis of reflux esophagitis was established by Savary-Miller and Vandenplas grading systems, respectively. Esophageal biopsy specimens were taken from the esophagus 20% proximal above the esophagogastric junction for conventional histopathological examination and the measurements of ROS and cytokine levels. ROS were measured by chemiluminescence, whereas IL-8 and MCP-1 levels were determined with quantitative immunometric ELISA on esophageal tissue. Esophageal tissue ROS, IL-8 and MCP-1 levels were compared among groups with and without endoscopic/histo-pathologic esophagitis.
RESULTS: Of 59 patients 28 (47.5%) had normal esophagus whereas 31 (52.5%) had endoscopic esophagitis. In histopathological evaluation, almost 73% of the cases had mild and 6.8% had moderate degree of esophagitis. When ROS and chemokine levels were compared among groups with and without endoscopic esophagitis, statistical difference could not be found between patients with and without esophagitis. Although the levels of ROS, IL-8 and MCP-1 were found to be higher in the group with histopathological reflux esophagitis, this difference was not statistically significant.
CONCLUSION: These results suggest that the grade of esophagitis is usually mild or moderate during childhood and factors apart from ROS, IL-8 and MCP-1 may be involved in the pathogenesis of reflux esophagitis in children.
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Uraz S, Tahan V, Aygun C, Eren F, Unluguzel G, Yuksel M, Senturk O, Avsar E, Haklar G, Celikel C, Hulagu S, Tozun N. Role of ursodeoxycholic acid in prevention of methotrexate-induced liver toxicity. Dig Dis Sci 2008; 53:1071-7. [PMID: 17934844 DOI: 10.1007/s10620-007-9949-3] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.6] [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: 01/28/2007] [Accepted: 07/24/2007] [Indexed: 12/12/2022]
Abstract
AIM Methotrexate (MTX)-induced hepatotoxicity restricts the clinical use of this immunosuppressive drug. In this study, our aim was to research the role of oxidative stress in the hepatic toxicity of MTX and the protective effect of ursodeoxycholic acid (UDCA) in this setting. METHODS Wistar type rats (n = 32) were divided into four groups; group-1 as the MTX + UDCA, group-2 as the MTX, group-3 as the UDCA, group-4 as the saline-receiving groups. The MTX + UDCA and MTX groups of rats received 50 mg/kg of UDCA administered orally; whilst physiological saline was administered orally to the MTX and saline groups and continued for the next 6 days. On the second day of the study, the MTX + UDCA and MTX groups had a single intraperitoneal dose of MTX of 20 mg/kg. The UDCA and saline groups also received similar volumes of physiological saline intraperitoneally. On the sixth day, serum samples were collected and analyzed for ALT, alkaline phosphatase (ALP) and gamma glutamyl transpeptidase (GGT) and homogenated liver tissues were examined for reactive oxygen metabolites (ROM); luminol, lucigenin, lipid peroxygenation product malondialdehyde (MDA) and glutathione (GSH) levels. RESULTS In the MTX group, serum ALT, ALP, GGT and tissue ROM levels were higher and GSH level was lower. On the histopathological examination, hepatocellular necrosis was clearly more evident in the MTX group than the MTX + UDCA group. CONCLUSIONS UDCA treatment protects against MTX-induced liver toxicity. Histopathologically hepatocyte necrosis can be prevented by UDCA treatment, indicating clearly the hepatoprotective effect of this agent on MTX-induced liver injury.
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Affiliation(s)
- Suleyman Uraz
- Department of Gastroenterology, Kocaeli University Medical Faculty, Kocaeli, Turkey
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Imeryuz N, Tahan V, Sonsuz A, Eren F, Uraz S, Yuksel M, Akpulat S, Ozcelik D, Haklar G, Celikel C, Avsar E, Tozun N. Iron preloading aggravates nutritional steatohepatitis in rats by increasing apoptotic cell death. J Hepatol 2007; 47:851-9. [PMID: 17825453 DOI: 10.1016/j.jhep.2007.06.018] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [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: 02/07/2007] [Revised: 06/15/2007] [Accepted: 06/23/2007] [Indexed: 12/13/2022]
Abstract
BACKGROUND/AIMS High serum ferritin and liver iron concentrations were found in some patients with NASH, suggesting a role for iron as a co-factor that aggravates liver injury. The aim of this study is to investigate the effects of parenteral iron in a rat model of NASH induced by a methionine choline deficient diet (MCDD). METHODS Wistar rats were divided into 1 - Control, 2 - Iron (Fe), 3 - MCDD, 4 - MCDD&Fe groups. Iron dextran 100mg/kg was administered intra-muscularly in groups 2 and 4. All rats were fed MCDD, Groups 1 and 2 were supplied with choline and methionine. Blood and tissue samples were obtained after 4weeks. RESULTS The iron injection alone did not affect the liver whereas MCDD led to steatohepatitis. Iron worsened steatosis without any obvious effect on accompanying inflammation. It aggravated tissue injury by increasing apoptosis. Liver fibrosis was observed only in 3 out of 10 rats in the MCDD&Fe group. CONCLUSIONS Observation of liver fibrosis only in the MCDD&Fe group suggests that iron induced increase in apoptosis contributes to the development of fibrosis at an earlier time than expected.
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Affiliation(s)
- Nese Imeryuz
- Department of Gastroenterology, Marmara University School of Medicine, Altunizade, Istanbul, Turkey
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Tahan V, Eren F, Avsar E, Yavuz D, Yuksel M, Emekli E, Imeryuz N, Celikel C, Uzun H, Haklar G, Tozun N. Rosiglitazone attenuates liver inflammation in a rat model of nonalcoholic steatohepatitis. Dig Dis Sci 2007; 52:3465-72. [PMID: 17436085 DOI: 10.1007/s10620-007-9756-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [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: 10/21/2006] [Accepted: 01/01/2007] [Indexed: 12/11/2022]
Abstract
Rosiglitazone is an insulin-sensitizing agent. We aimed to assess the effects of rosiglitazone on a methionine- and choline-deficient diet (MCDD) model of nonalcoholic steatohepatitis (NASH) in rats. Wistar rats were fed either MCDD or a control diet in the 4-week induction study; they were given saline or 4 mg/kg/day rosiglitazone. After the induction study period, the rats were divided into four groups and fed MCDD or given a control diet for an additional 8 weeks and received saline or rosiglitazone. Serum and tissue samples were obtained. Rosiglitazone improved inflammation in NASH and improved ALT, alkaline phosphatase, and interleukin-6 levels in the induction study and interleukin-1beta, interleukin-6, and tumor necrosis factor-alpha levels in the treatment study. Our preliminary study is the first to show the anti-inflammatory effects of rosiglitazone in NASH. Rosiglitazone's effect on cytokines may be a key mechanism of its anti-inflammatory effect in NASH.
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Affiliation(s)
- Veysel Tahan
- Department of Gastroenterology, Marmara University School of Medicine, Istanbul, Turkey.
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Abstract
AIM To determine the value of high-sensitivity C-reactive protein (hs-CRP) in predicting risk factors for coronary heart disease (CHD) in children. METHODS We measured hs-CRP levels in 51 children (11.79 +/- 3.14 years) with risk factors for CHD (hypercholesterolemia, hypertension, obesity, low HDL cholesterol and familial history of CHD). The results were compared with 26 children (12.98 +/- 2.59 years) without any risk factors. RESULTS The children with risk factors had significantly higher serum levels of hs-CRP compared to the control group (3.33 +/- 4.58 vs. 0.92 +/- 1.90 mg/L, respectively, p < 0.01). CRP concentrations significantly increased in children with three or more risk factors. Hs-CRP levels correlated to body mass index (r = 0.411, p = 0.003), diastolic blood pressure (r = 0.323, p = 0.021), fibrinogen (r = 0.447 and p = 0.004) and HDL cholesterol levels (r =-0.461 and p = 0.001). Cutoff value for CRP was 1.04 mg/L with 58% sensitivity and 92% specificity. CONCLUSION Serum hs-CRP level is a useful marker in screening the children who are under the risk of CHD in adulthood. Early identification of the children with risk factors and intervention for obesity, harmful habits and life style in childhood might decrease the incidence of coronary heart disease in adulthood.
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Affiliation(s)
- Omer Guran
- Department of Paediatrics, Marmara University Faculty of Medicine, Istanbul, Turkey.
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Abstract
BACKGROUND Recent evidence suggests that inflammation in rosacea is associated with generation of reactive oxygen species (ROS) that are released by inflammatory cells. The efficacy of current therapeutic agents for rosacea such as tetracyclines and metronidazole has also been attributed to their antioxidant properties. Recently, a macrolide antibiotic, azithromycin, has been found to be an effective alternative in the treatment of rosacea. AIM We planned a study to evaluate the antioxidant effects of azithromycin on ROS in rosacea. We compared basal ROS concentrations measured in the facial skin of patients with rosacea with the post-treatment levels and with those of healthy controls. METHODS Facial skin biopsies of 17 papulopustular patients with rosacea and 25 healthy controls were taken. Rosacea patients were assigned to receive oral azithromycin 500 mg on three consecutive days each week for 4 weeks. The total number of inflammatory lesions (the sum of papules and pustules) on the face of each patient with rosacea was counted at each visit. The luminol- and lucigenin-enhanced chemiluminescence (CL) levels of patients with rosacea were measured before and after 4 weeks of treatment and compared with those of healthy controls. RESULTS Rosacea patients had higher ROS levels than healthy controls (P < 0.001). A statistically significant decrease of both luminol- and lucigenin-enhanced CL levels were observed in patients with rosacea after treatment with azithromycin (t = 4.602, P < 0.001; vs. t = 4.634, P < 0.001, respectively). CONCLUSION Rosacea patients have higher ROS levels than healthy controls. The results of our study support the antioxidant properties of azithromycin in rosacea.
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Affiliation(s)
- O Bakar
- Department of Dermatology, Acibadem Kozyatagi Hospital, Istanbul, Turkey.
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Turan S, Bereket A, Furman A, Omar A, Berber M, Ozen A, Akbenlioglu C, Haklar G. The effect of economic status on height, insulin-like growth factor (IGF)-I and IGF binding protein-3 concentrations in healthy Turkish children. Eur J Clin Nutr 2006; 61:752-8. [PMID: 17164829 DOI: 10.1038/sj.ejcn.1602575] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [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: 11/08/2022]
Abstract
OBJECTIVES The effect of economic status (ES) on growth, insulin-like growth factor (IGF)-I and IGF-binding protein (IGFBP)-3 in healthy children is not well characterized. We aimed to study the interrelationship between height, weight, IGF-I, IGFBP-3, mid-parental height (MPH) and ES. DESIGN/SUBJECTS Eight hundred and fourteen healthy children (428 boys, 386 girls; age 3-18 years) were classified according to income of the families as low, middle and high. Standard deviation scores (SDSs) of height, weight, MPH, IGF-I and IGFBP-3 were compared between the groups. The combined effect of these parameters and ES on height SDS was investigated with complex statistical models. RESULTS There was a significant trend for height and weight SDSs to increase with higher income levels in boys, but not in girls. Body mass index (BMI) SDSs were similar in three groups. There was a general trend for MPH SDS to increase with income levels in both sexes. In boys, IGF-I SDS was significantly higher in high ES group than low ES. In girls, IGFBP-3 SDSs were significantly higher in high ES group than in middle ES group. For both genders, height SDS was highly correlated with weight SDS and moderately correlated with BMI SDS, MPH SDS and IGF-1 SDS. All correlations were significant and positive. Complex models showed that MPH (19%), IGF-I (13%) and ES (3%) in boys, and MPH (16%) and IGF-I (7%) in girls have significant contribution to height SDSs. CONCLUSIONS ES per se, independent of overt malnutrition, affects height, weight, IGF-I and IGFBP-3 with some gender differences in healthy children. Influence of income on height and weight show sexual dimorphism, a slight but significant effect is observed only in boys. MPH is the most prominent variable effecting height in healthy children. Higher height and MPH SDSs observed in higher income groups suggest that secular trend in growth still exists, at least in boys, in a country of favorable economic development.
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Affiliation(s)
- S Turan
- Department of Paediatric Endocrinology, Marmara University, School of Medicine, Istanbul, Turkey.
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Bereket A, Turan S, Omar A, Berber M, Ozen A, Akbenlioglu C, Haklar G. Serum IGF-I and IGFBP-3 Levels of Turkish Children during Childhood and Adolescence: Establishment of Reference Ranges with Emphasis on Puberty. Horm Res Paediatr 2006; 65:96-105. [PMID: 16462144 DOI: 10.1159/000091301] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [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: 07/20/2005] [Accepted: 12/07/2005] [Indexed: 11/19/2022] Open
Abstract
AIMS/METHODS We established age- and sex-related reference ranges for serum insulin-like growth factor-I (IGF-I) and insulin-like growth factor binding protein-3 (IGFBP-3) levels in 807 healthy Turkish children (428 boys, 379 girls), and constructed a model for calculation of standard deviation scores of IGF-I and IGFBP-3 according to age, sex and pubertal stage. RESULTS Serum IGF-I and IGFBP-3 concentrations tended to be higher in girls compared to boys of the same ages, but the differences were statistically significant only in pubertal ages (9-14 years) for IGF-I and only in prepubertal ages for IGFBP-3 (6-8 years) (p < 0.05). Peak IGF-I concentrations were observed earlier in girls than boys (14 vs. 15 years, Tanner stage IV vs. V) starting to decline thereafter. IGFBP-3 levels peaked at age 13 and at Tanner stage IV in both sexes with a subsequent fall. Serum levels of IGF-I and IGFBP-3 increased steadily with age in the prepubertal stage followed by a rapid increase in IGF-I in the early pubertal stages. A relatively steeper increase in IGF-I but not in IGFBP-3 levels was observed at age 10-11 years in girls and at 12-13 years in boys which preceded the reported age of pubertal growth spurt. At late pubertal stages, both IGF-I and IGFBP-3 either did not change or decreased by increasing age. Interrelationships between growth factors and anthropometric measurements have been described, and the physiologic consequences of these have been discussed in detail. CONCLUSIONS Differences in the pattern of IGF-I and IGFBP-3 in the present paper and those reported in other studies emphasize the importance of locally established reference ranges. Establishment of this reference data and a standard deviation score prediction model based on age, sex and puberty will enhance the diagnostic power and utility of IGF-I and IGFBP-3 in evaluating growth disorders in our population.
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Affiliation(s)
- Abdullah Bereket
- Department of Paediatric Endocrinology, Marmara University, School of Medicine, Istanbul, Turkey.
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Bereket A, Turan S, Karaman MG, Haklar G, Ozbay F, Yazgan MY. Height, weight, IGF-I, IGFBP-3 and thyroid functions in prepubertal children with attention deficit hyperactivity disorder: effect of methylphenidate treatment. Horm Res 2005; 63:159-64. [PMID: 15795512 DOI: 10.1159/000084683] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2004] [Accepted: 02/08/2005] [Indexed: 11/19/2022]
Abstract
OBJECTIVE To investigate if there are any disease-related or methylphenidate-induced aberrations in growth parameters, growth hormone insulin-like growth factor (IGF)-I, IGFBP-3 axis and the thyroid function tests in children with attention deficit hyperactivity disorder (ADHD). METHODS Newly diagnosed and untreated prepubertal children with ADHD were longitudinally followed before and approximately every 4 months after methylphenidate treatment for up to 16 months. Height SDS, weight SDS, BMI SDS, serum GH, IGF-I, IGFBP-3, T4, free T4, T3, and TSH were measured at each visit. RESULTS All of the examined parameters were within normal limits for age before treatment. Methylphenidate treatment did not significantly affect SDS of height, weight, BMI, IGF-I and IGFBP-3 in the long run. Serum T4 and free T4 levels showed modest reductions within normal limits in a time-dependent manner. CONCLUSIONS Prepubertal children with ADHD had normal height, weight, BMI, serum IGF-I and IGFBP-3 and thyroid functions. Methylphenidate treatment had no sustained effects on growth parameters, IGF-I and IGFBP-3 during the follow-up period of this study. However, it caused a mild decrease in total and free T4 which may warrant further monitoring.
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Affiliation(s)
- Abdullah Bereket
- Department of Pediatric Endocrinology, Marmara University, Istanbul, Turkey.
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Emekli U, Tuncer S, Kabakas F, Aydin A, Arinci A, Bilgic B, Haklar G. The effect of short- versus long-term administration of alpha tocopherol on the survival of random flaps in experimental diabetes mellitus. J Diabetes Complications 2004; 18:249-57. [PMID: 15337497 DOI: 10.1016/j.jdiacomp.2004.05.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [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: 03/08/2004] [Revised: 05/17/2004] [Accepted: 05/19/2004] [Indexed: 12/15/2022]
Abstract
The effects of short- versus long-term alpha tocopherol administration on oxidative stress and survival of dorsal random flaps were studied in diabetic rats. Seven groups, with 20 rats in each, were constructed: (1) control, (2) noncontrolled diabetes, (3) noncontrolled diabetes+short-term alpha tocopherol, (4) noncontrolled diabetes+long-term alpha tocopherol, (5) insulin treatment, (6) insulin+short-term alpha tocopherol, and (7) insulin+long-term alpha tocopherol. After 3 months of diabetes, dorsal McFarlane flaps were raised. Flap viability and free-radical measurements with histopathological examination were investigated. Mean flap survival in Groups I to VII were 84.0+/-2.2%, 55.0+/-2.4%, 57.0+/-2.5%, 57.8+/-3.7%, 64.1+/-4.1%, 70.0+/-4.9%, and 77.0+/-6.6%, respectively. Free-radical concentration, as assessed with luminol- and lucigenin-enhanced chemiluminiscence, was inversely correlated with flap survival. The results for viability and free-radical concentrations were significant between Groups 1, 2, 5, 6, and 7. Random flaps in diabetic animals showed significantly greater necrosis compared with controls. Among the diabetic animals, group receiving combination of insulin and long-term alpha tocopherol treatment had the greatest flap viability and least tissue free-radical concentration. Histopathological studies showed a hyalinization of arterioles in diabetics with long-term alpha tocopherol treatment protecting the vessel wall. In conclusion, random flaps in experimental diabetes mellitus show greater tissue oxidative stress and necrosis, which is only partially corrected with insulin treatment. Long-term antioxidant supplementation as an adjunct to insulin further lowers the oxidative stress, protects vessel structure and function, and therefore increases flap survival.
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Affiliation(s)
- Ufuk Emekli
- Department of Plastic, Reconstructive and Aesthetic Surgery, Faculty of Medicine, Istanbul University, Turkey.
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Cam K, Simsek F, Yuksel M, Turkeri L, Turker L, Haklar G, Yalcin S, Akdas A. The role of reactive oxygen species and apoptosis in the pathogenesis of varicocele in a rat model and efficiency of vitamin E treatment. ACTA ACUST UNITED AC 2004; 27:228-33. [PMID: 15271202 DOI: 10.1111/j.1365-2605.2004.00476.x] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.4] [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: 12/23/2022]
Abstract
We investigated role of reactive oxygen species (ROS) and apoptosis in the pathogenesis of infertility in experimental model of varicocele. The protective effect of vitamin E was also examined. Three groups of rats were constructed as the first group had sham operation, experimental varicoceles were established by partial ligation of the left renal vein in later two groups. Third group had received vitamin E. Production of ROS was determined by chemiluminescence assay (CL). The in situ end labelling technique was utilized to investigate apoptosis. Tissue vitamin E levels were measured by high performance liquid chromatography. The differences between luminol enhanced CL levels of groups were not statistically significant. However, the difference between CL levels of lucigenin probe in left testicles of sham and varicocele groups were statistically significant ( p = 0.0007). Similarly, the results of the third group receiving vitamin E significantly differed from the varicocele group ( p = 0.0025). The difference of apoptotic index was also statistically significant between sham and varicocele groups ( p = 0.0038). Although the values of apoptotic index detected in the vitamin E group were lower compared with the varicocele group, the difference was not significant. This study proposes that ROS production and apoptosis in the testicles were induced with experimental varicocele. Vitamin E had a protective role. An increased rate of apoptosis with experimental varicocele suggests a molecular alteration, which may involve ROS overproduction as the triggering mechanism. Consequently, this study indicates an association between varicocele and infertility at molecular level through stimulation of ROS and apoptosis.
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Affiliation(s)
- Kamil Cam
- Department of Urology, Abant Izzet Baysal University, Duzce Medical School, Duzce, Turkey.
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Saybaşili H, Yüksel M, Haklar G, Yalçin AS. Effect of mitochondrial electron transport chain inhibitors on superoxide radical generation in rat hippocampal and striatal slices. Antioxid Redox Signal 2001; 3:1099-104. [PMID: 11813983 DOI: 10.1089/152308601317203602] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.8] [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] [Indexed: 12/21/2022]
Abstract
In this study, we have compared the generation of superoxide radical in rat hippocampal and striatal slices in the presence of specific mitochondrial electron transport chain (ETC) inhibitors (complexes I and III) under control and depolarization conditions [incubation in artificial cerebrospinal fluid (ACSF) or depolarizing ACSF (dACSF), respectively]. Superoxide radical generation was increased in both ACSF- and dACSF-incubated hippocampal and striatal slices when rotenone and antimycin A were added to the incubation medium. The increase in superoxide radical was dependent on the concentration of ETC inhibitors under control, but not depolarization conditions. Rotenone was found to be more effective than antimycin A in producing superoxide radical from hippocampal and striatal slices. Our results also showed that hippocampal slices were more sensitive to ETC inhibitors compared with striatal slices. Thus, different regions of the brain seem to differ in their capacity to generate free radicals and vulnerability to oxidative stress conditions. This difference should be considered in developing therapeutic modalities against oxidative stress-related disorders and neurodegeneration.
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Affiliation(s)
- H Saybaşili
- Biomedical Engineering Institute, Bogaziçi University, School of Medicine, Marmara University, Istanbul, Turkey
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Ozveri ES, Bozkurt A, Haklar G, Cetinel S, Arbak S, Yeğen C, Yeğen BC. Estrogens ameliorate remote organ inflammation induced by burn injury in rats. Inflamm Res 2001; 50:585-91. [PMID: 11822783 DOI: 10.1007/pl00000238] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.3] [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: 01/28/2023] Open
Abstract
OBJECTIVE AND DESIGN The present study was designed to investigate the role of sex steroids in burn-induced remote organ injury. MATERIAL OR SUBJECTS Male Wistar albino rats were given burn trauma (n=39), and underwent castration or sham operation at 2 h following the burn injury. TREATMENT Rats were injected sc with either 17beta estradiol benzoate (E2, 10 mg/kg) or an androgen receptor blocker cyproterone acetate (CPA, 25 mg/kg) or vehicle, immediately after burn and at 12 h. METHODS At 24 h of burn insult, rats were decapitated. Blood samples for RIA of testosterone, estradiol and tumor necrosis factor (TNF)-alpha and the tissue samples for myeloperoxidase activitiy (MPO) were taken. ANOVA student's t test was used for statistical analysis. RESULTS Castration, antiandrogen and E2 treatments increased plasma estradiol levels and depressed burn-induced elevation in serum TNF-alpha levels. In the liver and lung, burn-induced increase in MPO was reduced by E2 and castration, while CPA was effective in reducing neutrophil infiltration only in the liver. CONCLUSION We propose that treatment with estrogens or antiandrogens might be applicable in clinical situations to ameliorate systemic inflammation induced by burn.
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Affiliation(s)
- E S Ozveri
- Marmara University Hospital, Dept of General Surgery, Altunizade, Istanbul, Turkey
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Enç FY, Imeryüz N, Akin L, Turoğlu T, Dede F, Haklar G, Tekeşin N, Bekiroğlu N, Yeğen BC, Rehfeld JF, Holst JJ, Ulusoy NB. Inhibition of gastric emptying by acarbose is correlated with GLP-1 response and accompanied by CCK release. Am J Physiol Gastrointest Liver Physiol 2001; 281:G752-63. [PMID: 11518688 DOI: 10.1152/ajpgi.2001.281.3.g752] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.5] [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] [Indexed: 01/31/2023]
Abstract
We investigated the effect of acarbose, an alpha-glucosidase and pancreatic alpha-amylase inhibitor, on gastric emptying of solid meals of varying nutrient composition and plasma responses of gut hormones. Gastric emptying was determined with scintigraphy in healthy subjects, and all studies were performed with and without 100 mg of acarbose, in random order, at least 1 wk apart. Acarbose did not alter the emptying of a carbohydrate-free meal, but it delayed emptying of a mixed meal and a carbohydrate-free meal given 2 h after sucrose ingestion. In meal groups with carbohydrates, acarbose attenuated responses of plasma insulin and glucose-dependent insulinotropic polypeptide (GIP) while augmenting responses of CCK, glucagon-like peptide-1 (GLP-1), and peptide YY (PYY). With mixed meal + acarbose, area under the curve (AUC) of gastric emptying was positively correlated with integrated plasma response of GLP-1 (r = 0.68, P < 0.02). With the carbohydrate-free meal after sucrose and acarbose ingestion, AUC of gastric emptying was negatively correlated with integrated plasma response of GIP, implying that prior alteration of carbohydrate absorption modifies gastric emptying of a meal. The results demonstrate that acarbose delays gastric emptying of solid meals and augments release of CCK, GLP-1, and PYY mainly by retarding/inhibiting carbohydrate absorption. Augmented GLP-1 release by acarbose appears to play a major role in the inhibition of gastric emptying of a mixed meal, whereas CCK and PYY may have contributory roles.
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Affiliation(s)
- F Y Enç
- Division of Gastroenterology, Department of Internal Medicine, University of Marmara Medical School, Istanbul 81326
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Haklar G, Sayin-Ozveri E, Yüksel M, Aktan AO, Yalçin AS. Different kinds of reactive oxygen and nitrogen species were detected in colon and breast tumors. Cancer Lett 2001; 165:219-24. [PMID: 11275372 DOI: 10.1016/s0304-3835(01)00421-9] [Citation(s) in RCA: 100] [Impact Index Per Article: 4.3] [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: 12/26/2022]
Abstract
Several studies have shown the involvement of reactive oxygen species (ROS; O2*-, hypochlorite, hydroxyl radical, hydrogen peroxide) in carcinogenesis. With certain pathologies, nitric oxide (NO) is formed and can interact with superoxide radical (O2*-) resulting in the propagation of the highly reactive species, peroxynitrite. In order to study the molecular mechanisms underlying the ability of reactive oxygen and nitrogen species (RONS) to mediate carcinogenesis, we have measured ROS, NO, and peroxynitrite content of cancerous tissues obtained from colon and breast carcinoma cases by chemiluminescence technique. All ROS were significantly increased in cancerous colon tissues with hypochlorite making the most important contribution and suggesting the role of inflammatory cells. NO was also increased and the peroxynitrite concentration was higher in cancerous samples. For breast carcinoma cases, only O2*- was significantly increased. Hypochlorite was not detected excluding the contribution of inflammatory cells. NO concentrations were not significantly different, therefore, ROS might originate by change in the redox state of the tissue.
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Affiliation(s)
- G Haklar
- Department of Biochemistry, School of Medicine, Marmara University, 81326, Haydarpasa, Istanbul, Turkey
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Ozel SK, Yüksel M, Haklar G, Durakbaşa CU, Dagli TE, Aktan AO. Nitric oxide and endothelin relationship in intestinal ischemia/reperfusion injury (II). Prostaglandins Leukot Essent Fatty Acids 2001; 64:253-7. [PMID: 11418020 DOI: 10.1054/plef.2001.0268] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [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] [Indexed: 11/18/2022]
Abstract
Endothelins ( ETs ) are potent vasoconstrictors derived from vascular endothelium. They have primary roles in many pathophysiologic states including ischemia/reperfusion (I/R) injury. The relationships between nitric oxide (NO) and ETs are still under investigation. In this study on rats we want to focus on the interaction of NO and ET especially in I/R injury. For this purpose ET-1 and PD-156252, a nonselective ET receptor blocker, were given in a mesenteric I/R model and reactive oxygen species were detected directly using chemiluminescence of the ileal tissue. ET administrations to sham and I/R groups caused significant increases in NO concentrations whereas, in terms of peroxynitrite, which is a highly reactive group of free radicals, its increasing effects were seen only in I/R groups. This suggests that in I/R where superoxide levels increase together with NO, the conversion to peroxynitrite is likely and this effect is augmented with ET administration. On the other hand PD administration decreases superoxide and thereby peroxynitrite levels and this study shows that the effect of PD-156252 is established through this mode of action. These data suggest therapeutic approaches that may be beneficial in the treatment of I/R injury.
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Affiliation(s)
- S K Ozel
- Department of Pediatric Surgery, Marmara University School of Medicine, Istanbul, Turkey
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Oktar BK, Coşkun T, Bozkurt A, Yegen BC, Yüksel M, Haklar G, Bilsel S, Aksungar FB, Cetinel U, Granger DN, Kurtel H. Endothelin-1-induced PMN infiltration and mucosal dysfunction in the rat small intestine. Am J Physiol Gastrointest Liver Physiol 2000; 279:G483-91. [PMID: 10960346 DOI: 10.1152/ajpgi.2000.279.3.g483] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The objectives of this study were to characterize the effects of endothelin (ET)-1 on intestinal mucosal parameters and to assess the contribution of polymorphonuclear leukocytes (PMNs), intercellular adhesion molecule-1 (ICAM-1), and a platelet-activating factor (PAF) to the mucosal dysfunction induced by ET-1. Different concentrations of ET-1 (100, 200, and 400 pmol/kg) were infused into the superior mesenteric artery for 10 min, and tissue samples were obtained 30 min after terminating the infusion. ET-1 administration significantly elevated tissue myeloperoxidase activity, plasma carbonyl content, and tissue chemiluminescence intensity, indicating that ET-1 produces PMN infiltration and oxidant stress. Blood-to-lumen clearance of (51)Cr-EDTA significantly increased after ET-1 infusion (400 pmol/kg). Monoclonal antibodies against ICAM-1 (1A29, 2 mg/kg), antineutrophil serum, and PAF antagonist (WEB-2086, 10 mg/kg) attenuated the mucosal barrier dysfunction induced by ET-1. Overall, our data indicate that ET-1 causes PMN accumulation, oxidant stress, and mucosal dysfunction in the rat small intestine and that ET-1-induced mucosal dysfunction involves a mechanism that includes a role for PMNs, ICAM-1, and PAF.
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Affiliation(s)
- B K Oktar
- Department of Physiology, Marmara University School of Medicine, 81326 Haydarpaşa, Istanbul, Turkey
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Soybir G, Köksoy F, Ekiz F, Yalçin O, Fincan K, Haklar G, Yüksel M. The effects of free oxygen radical scavenger and platelet-activating factor antagonist agents in experimental acute pancreatitis. Pancreas 1999; 19:143-9. [PMID: 10438161 DOI: 10.1097/00006676-199908000-00007] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [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] [Indexed: 01/06/2023]
Abstract
This study was done to evaluate the possible preventive effects of reactive oxygen species (ROS) scavenger agent desferrioxamine (DFX) and platelet-activating factor (PAF) antagonist agent ginkgo biloba (GB) in an experimental acute pancreatitis model. Seventy-eight CD-1 mice were divided into six groups consisting of 10-13 mice. Induction of pancreatitis was achieved by cerulein injection in groups 2-5. The first group was control, whereas DFX and GB were used alone or in combinations as preventive agents in groups 3-5. DFX or GB were injected to the mice in groups 6 and 7 to evaluate any toxic effect. The assessment of the pancreatic edema and inflammation, the measurement of the amylase and the pancreatic weight and the measurement of the pancreatic tissue oxidative capacity by chemiluminescence method were the parameters to evaluate pancreatitis. Although the results indicate DFX and GB alone or in combinations have significant preventive roles, this was not a complete prevention.
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Affiliation(s)
- G Soybir
- 2. Surgical Clinic, Haseki State Hospital, Turkey.
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