K. Unluhizarci, A. Kiriş, K. Kose, E. Tanrıkulu, Z. Karaca, F. Tanrıverdi, F. Keleştimur
Abstract Purpose: Hypothyroidism has profound effects on multiple organs and systems including cellular oxidative damage. Thus, we aimed to investigate the effects of acute hypothyroidism on oxidative stress in patients with differentiated thyroid carcinoma (DTC). Patients: 33 patients with DTC were involved in the study. 23 healthy subjects matched for age and body mass index (BMI) served as control group. Fasting blood sample was obtained for the determination of blood chemistry, lipids, myeloperoxidase (MPO) activity, total lipid hydroperoxide (LHP), pyrrolized protein, protein carbonyl compounds (PCC), advanced oxidation protein products (AOPP) and thiol levels before and after thyroid hormone withdrawal (THW) in patients with DTC. Results: MPO activity, total LHP, pyrrolized protein, PCC and AOPP levels were significantly higher, but thiol levels were significantly lower in patients with DTC while on L-thyroxine treatment than those of healthy subjects. At acute hypothyroid status after THW, MPO activity, total LHP, pyrrolized protein, PCC and AOPP levels further increased, thiol levels further decreased in patients with DTC as compared to healthy subjects and to their on L-thyroxine treatment period. Conclusions: This study showed an increased oxidative stress in patients with DTC which is further exacerbated with acute hypothyroidism upon THW. This situation may have treatment implications such as antioxidant therapy, at least during THW.
{"title":"Thyroid Hormone Withdrawal Further Exacerbates Oxidative Stress in Patients with Thyroid Carcinoma","authors":"K. Unluhizarci, A. Kiriş, K. Kose, E. Tanrıkulu, Z. Karaca, F. Tanrıverdi, F. Keleştimur","doi":"10.1055/s-0035-1565192","DOIUrl":"https://doi.org/10.1055/s-0035-1565192","url":null,"abstract":"Abstract Purpose: Hypothyroidism has profound effects on multiple organs and systems including cellular oxidative damage. Thus, we aimed to investigate the effects of acute hypothyroidism on oxidative stress in patients with differentiated thyroid carcinoma (DTC). Patients: 33 patients with DTC were involved in the study. 23 healthy subjects matched for age and body mass index (BMI) served as control group. Fasting blood sample was obtained for the determination of blood chemistry, lipids, myeloperoxidase (MPO) activity, total lipid hydroperoxide (LHP), pyrrolized protein, protein carbonyl compounds (PCC), advanced oxidation protein products (AOPP) and thiol levels before and after thyroid hormone withdrawal (THW) in patients with DTC. Results: MPO activity, total LHP, pyrrolized protein, PCC and AOPP levels were significantly higher, but thiol levels were significantly lower in patients with DTC while on L-thyroxine treatment than those of healthy subjects. At acute hypothyroid status after THW, MPO activity, total LHP, pyrrolized protein, PCC and AOPP levels further increased, thiol levels further decreased in patients with DTC as compared to healthy subjects and to their on L-thyroxine treatment period. Conclusions: This study showed an increased oxidative stress in patients with DTC which is further exacerbated with acute hypothyroidism upon THW. This situation may have treatment implications such as antioxidant therapy, at least during THW.","PeriodicalId":342775,"journal":{"name":"Experimental and Clinical Endocrinology & Diabetes (Barth)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115169439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T. Ebert, M. Platz, S. Kralisch, U. Lossner, B. Jessnitzer, J. Richter, M. Blüher, M. Stumvoll, M. Fasshauer
Abstract Objective: Copeptin, the c-terminal part of pro-Arginine vasopressin, has recently been introduced as a novel risk factor to develop facets of the metabolic syndrome. However, regulation of copeptin in pregnancy-associated metabolic disease, i. e., gestational diabetes mellitus (GDM), has not been fully understood, so far. Patients and Measurements: For this study, 74 GDM patients and 74 healthy, pregnant, age-, body mass index-, and gestational age-matched controls were recruited. Serum levels of copeptin were quantified by an illuminometric assay. Furthermore, copeptin concentrations were correlated to biochemical and anthropometric markers of obesity, glucose and lipid metabolism, renal function, and inflammation. Results: Median [interquartile range] serum copeptin levels were significantly lower in subjects with GDM (3.5 [2.0] pmol/l) as compared to controls (4.4 [3.2] pmol/l) (p<0.05). Furthermore, GDM remained an independent predictor of circulating copeptin in multivariate regression analysis (p<0.05). Moreover, copeptin was independently associated with gestational age at blood sampling (p<0.05). Conclusions: Copeptin serum levels are significantly lower in GDM as compared to healthy pregnant controls. Further studies are needed to better clarify the pathophysiological role of copeptin in GDM.
{"title":"Serum Levels of Copeptin are Decreased in Gestational Diabetes Mellitus","authors":"T. Ebert, M. Platz, S. Kralisch, U. Lossner, B. Jessnitzer, J. Richter, M. Blüher, M. Stumvoll, M. Fasshauer","doi":"10.1055/s-0035-1565172","DOIUrl":"https://doi.org/10.1055/s-0035-1565172","url":null,"abstract":"Abstract Objective: Copeptin, the c-terminal part of pro-Arginine vasopressin, has recently been introduced as a novel risk factor to develop facets of the metabolic syndrome. However, regulation of copeptin in pregnancy-associated metabolic disease, i. e., gestational diabetes mellitus (GDM), has not been fully understood, so far. Patients and Measurements: For this study, 74 GDM patients and 74 healthy, pregnant, age-, body mass index-, and gestational age-matched controls were recruited. Serum levels of copeptin were quantified by an illuminometric assay. Furthermore, copeptin concentrations were correlated to biochemical and anthropometric markers of obesity, glucose and lipid metabolism, renal function, and inflammation. Results: Median [interquartile range] serum copeptin levels were significantly lower in subjects with GDM (3.5 [2.0] pmol/l) as compared to controls (4.4 [3.2] pmol/l) (p<0.05). Furthermore, GDM remained an independent predictor of circulating copeptin in multivariate regression analysis (p<0.05). Moreover, copeptin was independently associated with gestational age at blood sampling (p<0.05). Conclusions: Copeptin serum levels are significantly lower in GDM as compared to healthy pregnant controls. Further studies are needed to better clarify the pathophysiological role of copeptin in GDM.","PeriodicalId":342775,"journal":{"name":"Experimental and Clinical Endocrinology & Diabetes (Barth)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117083872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. Krysiak, K. Kowalcze, A. Bednarska-Czerwińska, B. Okopień
Abstract Non-classic congenital adrenal hyperplasia (NC-CAH), one of the most common genetic disorders, is often associated with the presence of hyperandrogenism. Recently both simvastatin and metformin were found to reduce plasma steroid hormone levels in this disorder. This study included 8 women with NC-CAH and diabetes or impaired glucose tolerance, as well as 12 matched women with similar glucose metabolism abnormalities but normal adrenal function. Both groups of women, receiving metformin for at least 6 months, were then treated with simvastatin (20 mg daily) for the following 12 weeks. Compared to patients with normal adrenal function, metformin-treated women with NC-CAH showed increased plasma levels of 17-hydroxyprogesterone, total testosterone, free testosterone, androstenedione and DHEA-S. Simvastatin reduced total and LDL cholesterol levels in both patients with NC-CAH and normal adrenal function. Moreover, in the former group of women, statin therapy decreased plasma levels of testosterone, free testosterone, androstenedione, dehydroepiandrosterone sulphate and tended to reduce 17-hydroxyprogesterone. Our results suggest that metformin-statin combination therapy may be useful in the management of symptomatic women with NC-CAH.
{"title":"The Effect of Simvastatin on Plasma Steroid Hormone Levels in Metformin-Treated Women with Non-Classic Congenital Adrenal Hyperplasia","authors":"R. Krysiak, K. Kowalcze, A. Bednarska-Czerwińska, B. Okopień","doi":"10.1055/s-0035-1569375","DOIUrl":"https://doi.org/10.1055/s-0035-1569375","url":null,"abstract":"Abstract Non-classic congenital adrenal hyperplasia (NC-CAH), one of the most common genetic disorders, is often associated with the presence of hyperandrogenism. Recently both simvastatin and metformin were found to reduce plasma steroid hormone levels in this disorder. This study included 8 women with NC-CAH and diabetes or impaired glucose tolerance, as well as 12 matched women with similar glucose metabolism abnormalities but normal adrenal function. Both groups of women, receiving metformin for at least 6 months, were then treated with simvastatin (20 mg daily) for the following 12 weeks. Compared to patients with normal adrenal function, metformin-treated women with NC-CAH showed increased plasma levels of 17-hydroxyprogesterone, total testosterone, free testosterone, androstenedione and DHEA-S. Simvastatin reduced total and LDL cholesterol levels in both patients with NC-CAH and normal adrenal function. Moreover, in the former group of women, statin therapy decreased plasma levels of testosterone, free testosterone, androstenedione, dehydroepiandrosterone sulphate and tended to reduce 17-hydroxyprogesterone. Our results suggest that metformin-statin combination therapy may be useful in the management of symptomatic women with NC-CAH.","PeriodicalId":342775,"journal":{"name":"Experimental and Clinical Endocrinology & Diabetes (Barth)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130506719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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