Impairment of mucosal barrier integrity of small intestine might be causative in immune-mediated gastrointestinal diseases. We tested the markers of epithelial apoptosis – cytokeratin 18 caspase-cleaved fragment (cCK-18), and enterocyte damage – intestinal fatty acid-binding protein (I-FABP) and soluble CD14 (sCD14) in sera of patients with untreated celiac disease (CLD), those on gluten-free diet (CLD-GFD), patients with autoimmune diabetes mellitus (T1D), T1D with insulitis (T1D/INS), and diabetes mellitus type 2 (T2D). We found elevated levels of cCK-18 (P<0.001), I-FABP (P<0.01) and sCD14 (P<0.05) in CLD when compared to healthy controls. However, the levels of cCK-18 (P<0.01) and I-FABP (P<0.01) in CLD-GFD were higher when compared with controls. Interestingly, elevated levels of cCK-18 and I-FABP were found in T2D and T1D (P<0.001), and T1D/INS (P<0.01, P<0.001). Twenty-two out of 43 CLD patients were seropositive for cCK-18, 19/43 for I-FABP and 11/43 for sCD14; 9/30 of T2D patients were positive for cCK-18 and 5/20 of T1D/INS for sCD14, while in controls only 3/41 were positive for cCK-18, 3/41 for I-FABP and 1/41 for sCD14. We documented for the first time seropositivity for sCD14 in CLD and potential usefulness of serum cCK-18 and I-FABP as markers of gut damage in CLD, CLD-GFD, and diabetes., I. Hoffmanová, D. Sánchez, V. Hábová, M. Anděl, L. Tučková, H. Tlaskalová-Hogenová., and Obsahuje bibliografii
Growing evidence suggests that diabetes mellitus is associated with impairment of the intestinal barrier. However, it is not clear so far if the impairment of the intestinal barrier is a consequence of prolonged hyperglycemia or the consequence of external factors influencing the gut microbiota and intestinal mucosa integrity. Aim of the study was to perform an estimation of relationship between serological markers of impairment of the intestinal barrier: intestinal fatty acid-binding protein (I-FABP), cytokeratin 18 caspase-cleaved fragment (cCK-18), and soluble CD14 (sCD14) and markers of prolonged hyperglycemia, such as the duration of diabetes mellitus and glycated hemoglobin (HbA1c) via a correlation analysis in patients with diabetes mellitus. In 40 adult patients with type 1 diabetes mellitus and 30 adult patients with type 2 diabetes mellitus the estimation has been performed. Statistically significant positive correlation was found between cCK-18 and HbA1c (r=0.5047, p=0.0275) in patients with type 1 diabetes mellitus with fading insulitis (T1D). In patients with type 1 diabetes mellitus with ongoing insulitis (T1D/INS) and in patients with type 2 diabetes mellitus (T2D), no statistically significant positive correlations were found between serological markers of intestinal barrier impairment (I-FABP, cCK-18, sCD14) and duration of diabetes or levels of HbA1c. Similarly, in cumulative cohort of patients with T1D/INS and patients with T1D we revealed statistically positive correlation only between HbA1c and cCK-18 (r=0.3414, p=0.0311). Surprisingly, we found statistically significant negative correlation between the duration of diabetes mellitus and cCK-18 (r=-0.3050, p=0.0313) only in cumulative group of diabetic patients (T1D, T1D/INS, and T2D). Based on our results, we hypothesize that the actual condition of the intestinal barrier in diabetic patients is much more dependent on variable interactions between host genetic factors, gut microbiota, and environmental factors rather than effects of long-standing hyperglycemia (assessed by duration of diabetes mellitus or HbA1c).
Recent studies have demonstrated that adipocyte fatty acid binding proteins (FABP) may play a role in the etiopathogenesis of insulin resistance. The aim of our study was to assess serum FABP levels in obese patients with type 2 diabetes mellitus (T2DM) before and after 3 months of treatment with PPAR-α agonist fenofibrate (F) and to explore the relationship of FABP to biochemical parameters and measures of insulin sensitivity assessed by hyperinsulinemic-isoglycemic clamp. We measured biochemical parameters by standard laboratory methods, insulin sensitivity by hyperinsulinemic-isoglycemic clamp and serum concentrations of FABP by commercial ELISA kit in 11 obese females with T2DM before and after three months of treatment with PPAR-α agonist fenofibrate and in 10 lean healthy control women (C). Serum FABP levels were 2.5-fold higher in T2DM group relative to C and were not affected by fenofibrate treatment (C: 20.6±2.1 μg/l, T2DM before F: 55.6±5.7 μg/l, T2DM after F: 54.2±5.4 μg/l, p<0.0001 for C vs. T2DM before F). Hyperinsulinemia during the clamp significantly suppressed FABP levels in both C and T2DM group. FABP levels positively correlated with BMI, triglyceride levels, blood glucose, glycated hemoglobin, atherogenic index and insulin levels. An inverse relationship was found between FABP and HDL levels, metabolic clearance rate of glucose, M/I and MCRglc/I sensitivity indexes. We conclude that FABP levels are closely related to BMI, parameters of insulin sensitivity, HDL levels and measures of diabetes compensation. This combination makes FABP a valuable marker of metabolic disturbances in patients with type 2 diabetes mellitus., M. M. Haluzík ... [et al.]., and Obsahuje seznam literatury
The aim of our study was to measure serum concentrations of fibroblast growth factor 19 (FGF-19) in patients with obesity (OB), obesity and type 2 diabetes mellitus (T2DM) and healthy subjects (C) at baseline and after selected interventions. We measured serum FGF-19 levels and other biochemical and hormonal parameters in 29 OB and 19 T2DM females and 30 sex- and age-matched control subjects. The interventions were acute hyperinsulinemia during isoglycemic-hyperinsulinemic clamp (n=11 for T2DM and 10 for C), very-low calorie diet (VLCD, n=12 for OB) and 3 months treatment with PPAR- α agonist fenofibrate (n=11 for T2DM). Baseline serum FGF-19 levels were significantly lower in OB relative to C group (132.1±12.7 vs. 202.2±16.7 pg/ml, p<0.05), while no significant difference was observed between T2DM and OB or control group. Acute hyperinsulinemia tended to decrease FGF-19 levels in both healthy and T2DM subjects. Three weeks of VLCD in OB group had no significant effect on FGF-19, whereas three months of fenofibrate treatment markedly reduced FGF-19 levels in T2DM patients (194.58±26.2 vs. 107.47±25.0 pg/ml, p<0.05). We conclude that FGF-19 levels in our study were at least partially dependent upon nutritional status, but were not related to parameters of glucose metabolism or insulin sensitivity., M. Mráz ... [et al.]., and Obsahuje bibliografii a bibliografické odkazy
The aim of the present study was to investigate the effects of Angiotensin II (Ang II) and Arginin-Vasopressin (AVP) on contractility of non-pregnant uterus in diabetic Wistar rats and to explore whether one-week administration of Melatonin (MLT) or Ghrelin (GHR) will change the response of diabetic uterine muscle to AngII and AVP. Uterine horns, prepared by the method of isolated tissues were investigated as w ell as glycemic profile, blood pressure and body weight. The research of smooth muscle contractions was made by a new method of analysis, characterizing in detail the various phases of the myometrial activity. Differences in the development of the peptide-mediated smooth muscle contractions depending on the phase of the estrous cycle were observed. Experimental diabetes had a pronounced negative effect on force and time-parameters of AngII and AVP-stimulated uterine contractions. Administration of GHR or MLT had a beneficial effect on the glycemic status of diabetic rats and partially improved the response of uterine preparations to the peptides. The application of MLT increased both force and time-parameters of Ang II- and AVP-stimulated uterine contractions while treatment with GHR increased power characteristics and shortened contraction and relaxation of the smooth muscle process., T. Georgiev, A. Tolekova, R. Kalfin, P. Hadzhibozheva., and Obsahuje bibliografii
Diabetes mellitus postihuje přibližně 4 % žen, u kterých v průběhu života dochází k interakci diabetu, jeho léčby a přirozených změn pohlavních hormonů (dětství, puberta, reprodukční období, gravidita, klimakterium). Přehledový článek shrnuje dosud publikovanou literaturu ke vzájemnému vztahu diabetu a pohlavního vývoje u žen., Approximately 4 % of female population suffers from diabetes. A permanent interaction between diabetes, its treatment and sex hormonal changes (childhood, puberty, reproduction, pregnancy, menopause) occurs in those women. This review article summarizes up to date published studies concerning reciprocal relationship between diabetes and sexual development in women., and Ludmila Brunerová, Jan Brož
Diabetes mellitus postihuje přibližně 4 % žen, u kterých v průběhu života dochází k interakci diabetu, jeho léčby a přirozených změn pohlavních hormonů (dětství, puberta, reprodukční období, gravidita, klimakterium). Přehledový článek shrnuje dosud publikovanou literaturu ke vzájemnému vztahu diabetu a pohlavního vývoje u žen. Klíčová slova: diabetes mellitus – gestace – hormonální kontracepce – hyperandrogenizmus – menopauza – pohlavní hormony – puberta, Approximately 4 % of female population suffers from diabetes. A permanent interaction between diabetes, its treatment and sex hormonal changes (childhood, puberty, reproduction, pregnancy, menopause) occurs in those women. This review article summarizes up to date published studies concerning reciprocal relationship between diabetes and sexual development in women. Key words: diabetes mellitus – gestation – hormonal contraceptive – hyperandrogenism – menopause – puberty – sex hormones, and Ludmila Brunerová, Jan Brož
Cíl studie: V USA je pro určení diagnózy diabetes mellitus možné užít stanovení koncentrace glykovaného hemoglobinu vedle dosud doporučované glykémie nalačno či glukózového tolerančního testu (oGTT). Cílem studie bylo srovnat citlivost oGTT a glykovaného hemoglobinu v diagnostice diabetu, tedy dosud užívaného a navrhovaného způsobu, a to na vlastním souboru nemocných. Typ studie: Observační srovnávací retrospektivní studie. Název a sídlo pracoviště: Ústav klinické biochemie a hematologie LF UK a FN v Plzni. Materiál a metody: Bylo vyšetřeno 255 nemocných, kterým byl proveden oGTT s výsledkem diabetes mellitus nebo porušená glukózová tolerance a současně stanovena hladina glykovaného hemoglobinu. Nemocní byli zařazeni do těchto diagnostických skupin podle hladiny glykovaného hemoglobinu a zařazení bylo srovnáno s původní diagnózou podle oGTT. Výsledky: U nemocných diagnostikovaných pomocí oGTT jako diabetici byla nalezena shoda podle glykovaného hemoglobinu jen ve 44,4 %, v 16 % nebyla odhalena ani porucha glukózové tolerance. U nemocných, zařazených podle oGTT jako porucha glukózové tolerance, byla shoda v 37,9 %, ve 12 % případů byl diagnotikován diabetes, v 46,0 % pak normální glukózová tolerance. Snižování diagnostického kritéria pro poruchu glukózové tolerance vede k vyššímu procentu pozitivních výsledků, ale dá se očekávat větší překrývání se zdravou populací. Závěr: Užití glykovaného hemoglobinu pro stanovení diagnózy diabetes mellitus nedává výsledky srovnatelné s dosud užívaným oGTT. I když má ve většině případů nižší diagnostickou senzitivitu, v určitém počtu případů dává naopak falešně pozitivní výsledky. Bude třeba zhodnotit, zda se jedná o nesprávné stanovení diagnózy, či zda stanovení glykovaného hemoglobinu lépe odráží riziko budoucích diabetických komplikací., Objective: In USA it is possible to use determination of glycated hemoglobin (HbA1c) for diagnostics of diabetes mellitus in addition to hitherto recommended fasting plasma glucose or oral glucose tolerance test (oGTT). Aim of the study was to compare sensitivity of oGTT and HbA1c determination in diagnostics of diabetes mellitus, i.e. up to now used and proposed way, namely in our group of patients. Design: Observational comparative retrospective trial. Settings: Institute of Clinical Biochemistry and Hematology, Faculty of Medicine, Charles University and Faculty Hospital, Pilsen, Czech Republic. Material and Methods: In 255 patients, oGTT was carried out with the result of diabetes mellitus or impaired glucose tolerance (IGT); at the same time, concentration of HbA1c was determined. The patients were then classified into these diagnostic groups according to HbA1c and their categorization was compared to that according to oGTT. Results: In patients with diabetes mellitus according to oGTT, the concordance with the categorization according to HbA1c was found only in 44.4 %, in 16 % of patients normal glucose tolerance was diagnosed. In a subgroup of patients with IGT according to the results of oGTT, the concordance was in 37.9 %, in 12 % of these patients diabetes mellitus was diagnosed and 46.0 % of the cases normal glucose tolerance was assessed. Lowering diagnostic criterion for IGT leads to higher percentage of positive results but we can assume higher overlapping with the healthy population. Conclusion: Diabetes mellitus diagnostics according to HbA1c level is not comparable with the results according to oGTT. Although it is less sensitive in most cases, in some cases it offers even false positive results. It will be necessary to decide whether it is a false diagnosis or it reflects better risk of future diabetic complications., Racek J., Růžičková V., Rajdl, D., and Lit.: 16
Pharmacological preconditioning by diazoxide and a model of experimental streptozotocin-induced acute diabetes mellitus (STZ-DM) provided similar levels of cardioprotection assessed as limiting myocardial infarct size. The aim was to explore the possibility of existence of another in vitro mechanism, which could be contributory to cardioprotection mediated by diazoxide treatment. Mitochondrial membrane fluidity and ATP synthase activity in isolated heart mitochondria were determined under the influence of two factors, STZ-DM condition and treatment with diazoxide. Both factors independently increased the ATP synthase activity (p<0.05), as no interaction effect was observed upon the combination of STZ-DM with diazoxide. On the other hand, the mitochondrial membrane fluidity was significantly increased by STZ-DM only; no significant main effect for diazoxide was found. Based on the results from measurements of enzyme kinetics, we assume a direct interaction of diazoxide with the molecule of ATP synthase stimulated its activity by noncompetitive activation. Our present work revealed, for the first time, that cardioprotection induced by diazoxide may not be caused exclusively by mitochondrial KATP opening, but presumably also by a direct interaction of diazoxide with ATP synthase, although the mechanisms for achieving this activation cannot be fully delineated., M. Jašová, I. Kancirová, M. Muráriková, V. Farkašová, I. Waczulíková, T. Ravingerová, A. Ziegelhöffer, M. Ferko., and Obsahuje bibliografii
Diabetes mellitus is associated with many complications including retinopathy, nephropathy, neuropathy and angiopathy. Increased cardiovascular risk is accompanied with diabetes-induced endothelial dysfunction. Pharmacological agents with endothelium-protective effects may decrease cardiovascular complications. In present study sulodexide (glycosaminoglycans composed from heparin-like and dermatan fractions) was chosen to evaluate its protective properties on endothelial dysfunction in diabetes. Effect of sulodexide treatment (SLX, 100 UI/kg/day, i.p.) in 5 and 10 weeks lasting streptozotocin-induced diabetes (30 mg/kg/day, i.p. administered for three consecutive days) was investigated. Animals were divided into four groups: control (injected with saline solution), control-treated with sulodexide (SLX), diabetic (DM) and diabetic-treated with sulodexide (DM+SLX). The pre-prandial and postprandial plasma glucose levels, number of circulating endothelial cells (EC) and acetylcholine-induced relaxation of isolated aorta and mesenteric artery were evaluated. Streptozotocin elicited hyperglycemia irrespective of SLX treatment. Streptozotocin-induced diabetes enhanced the number of circulating endothelial cells compared to controls. SLX treatment decreased the number of EC in 10-week diabetes. Acetylcholine-induced relaxation of mesenteric arteries was significantly impaired in 5 and 10-week diabetes. SLX administration improved relaxation to acetylcholine in 5 and 10-week diabetes. Diabetes impaired acetylcholine-induced relaxation of rat aorta irrespective of SLX treatment. Our results demonstrate that SLX treatment lowers the number of circulating endothelial cells and improves endothelium-dependent relaxation in small arteries. These findings suggest endothelium-protective effect of sulodexide in streptozotocin-induced diabetes., V. Kristová, S. Líšková, R. Sotníková, R. Vojtko, A. Kurtanský., and Obsahuje bibliografii a bibliografické odkazy