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Metabolic Status (metabolic + status)
Selected AbstractsFollicular, Oocyte and Embryo Features Related to Metabolic Status in Primiparous Lactating does Fed with High-Fibre Rearing DietsREPRODUCTION IN DOMESTIC ANIMALS, Issue 5 2010M Arias-Álvarez Contents Fertility of primiparous lactating does in the early postpartum (pp) period is very low mainly due to pronounced deficient energy intake, influencing oocyte and embryo developmental competence. The hypothesis used in this work was that high-lignin fibre diet supplied during the rearing period could increase feed intake and, consequently, improve the reproductive physiology and metabolic status of primiparous does in the early pp period. Diets with high-lignin [HL: 15.8% dry matter (DM)] or standard-lignin content (SL: 4.9% DM) were supplied until parturition time. No diet effects in serum oestradiol, progesterone concentrations and follicle categories were found in the histological study. Metaphase II rate of in vitro -matured oocytes was significantly higher in the SL vs the HL group (p < 0.001). Cytoplasmically degenerated oocytes (in terms of abnormal distribution of cortical granules) and follicular atresia rate were significantly lower in the SL group than in the HL group (p < 0.05 and p < 0.005 respectively). In addition, HL-fed does showed lower number of viable embryos and higher rate of retarded in vivo -recovered embryos compared with the SL group (p < 0.05). Neither in vitro embryo development of viable embryos nor conception rate was significantly different between groups. Feed intake increased during the first pregnancy in the HL group (p < 0.05), but not during early lactation. Serum protein, non-esterified fatty acid and leptin concentrations, as well as estimated body composition were similar in does fed with both diets. In conclusion, the enhancement of reproductive management by using highly lignified products in rearing diets does not seem to report physiological reproductive benefits affecting oocyte maturation rate and embryo viability in primiparous lactating does. [source] Influence of herring (Clupea harengus) and herring fractions on metabolic status in rats fed a high energy dietACTA PHYSIOLOGICA, Issue 3 2009H. Lindqvist Abstract Aim:, Few dietary studies have looked beyond fish oil to explain the beneficial metabolic effects of a fish-containing diet. Our aim was to study whether addition of herring, or sub-fractions of herring, could counteract negative metabolic effects known to be induced by a high-fat, high-sugar diet. Methods:, Rats were given six different diets: standard pellets; high energy diet with chicken mince (HiE control); high energy diet with herring mince (HiE herring); and high energy diet with chicken mince and either herring oil (HiE herring oil), herring press juice, PJ (HiE PJ) or herring low molecular weight PJ (HiE LMW-PJ). Factors associated with the metabolic syndrome were measured. Results:, There were no differences in energy intake or body weight between the groups, but animals fed high energy diets had a higher body fat content compared with the pellet group, although not statistically significant in all groups. Mesenteric adipocyte size was smaller in the HiE herring oil group compared with the HiE control. Glucose clamp studies showed that, compared with the pellet group, the HiE control and HiE herring diets, but not the HiE herring oil diet, induced insulin resistance. Addition of herring or herring oil to the high energy diet decreased total cholesterol levels, triacylglycerols and the atherogenic index compared with the HiE control group. Conclusions:, The results suggest that addition of herring or herring oil counteracts negative effects on blood lipids induced by a high energy diet. The lipid component of herring thus seems to be responsible for these beneficial effects. [source] Neurophysiology of hunger and satietyDEVELOPMENTAL DISABILITIES RESEARCH REVIEW, Issue 2 2008Pauline M. Smith Abstract Hunger is defined as a strong desire or need for food while satiety is the condition of being full or gratified. The maintenance of energy homeostasis requires a balance between energy intake and energy expenditure. The regulation of food intake is a complex behavior. It requires discrete nuclei within the central nervous system (CNS) to detect signals from the periphery regarding metabolic status, process and integrate this information in a coordinated manner and to provide appropriate responses to ensure that the individual does not enter a state of positive or negative energy balance. This review of hunger and satiety will examine the CNS circuitries involved in the control of energy homeostasis as well as signals from the periphery, both hormonal and neural, that convey pertinent information regarding short-term and long-term energy status of the individual. © 2008 Wiley-Liss, Inc. Dev Disabil Res Rev 2008;14:96,104. [source] Active immunization against (Pro3)GIP improves metabolic status in high-fat-fed miceDIABETES OBESITY & METABOLISM, Issue 9 2010I. A. Montgomery Aim: Ablation of gastric inhibitory polypeptide (GIP) receptor signalling can prevent many of the metabolic abnormalities associated with dietary-induced obesity-diabetes. The present study was designed to assess the ability of active immunization against (Pro3)GIP to counter metabolic dysfunction associated with diet-induced obesity in high-fat-fed mice. Methods: Normal male Swiss NIH mice were injected (s.c.) once every 14 days for 98 days with complexed (Pro3)GIP peptide, with transfer to a high-fat diet on day 21. Results: Active immunization against (Pro3)GIP resulted in circulating GIP antibody production and significantly (p < 0.05 p < 0.01) reduced circulating blood glucose concentrations compared to high-fat control mice from day 84 onwards. Glucose levels were not significantly different from lean controls. The glycaemic response to i.p. glucose was correspondingly improved (p < 0.01) in (Pro3)GIP-immunized mice. Furthermore, circulating and glucose-stimulated plasma insulin levels were significantly (p < 0.01 to p < 0.001) depressed compared to high-fat control mice. Liver triglyceride, pancreatic insulin and circulating LDL-cholesterol levels were also significantly reduced in (Pro3)GIP-immunized mice. These changes were independent of any effects on food intake or body weight. The glucose-lowering effect of native GIP was annulled in (Pro3)GIP-immunized mice consistent with the induction of biologically effective GIP-specific neutralizing antibodies. Conclusion: These results suggest that immunoneutralization of GIP represents an effective means of countering the disruption of metabolic processes induced by high-fat feeding. [source] Resveratrol modulates apoptosis and oxidation in human blood mononuclear cellsEUROPEAN JOURNAL OF CLINICAL INVESTIGATION, Issue 9 2003G. A. Losa Abstract Background, We examined the effect of resveratrol (RS), a nonflavonoid polyphenolic phytoalexin found in grapes and red wine, and RS coincubated with the oxidant 2-deoxy-D-ribose (dR), on apoptosis and on the oxidative metabolic status of normal human peripheral blood mononuclear cells (PBMNCs) isolated ex vivo from healthy donors. Material and methods, Apoptosis was measured by changes of membrane permeability to propidium iodide (PI), plasma membrane exposure of phosphatidylserine (PS) and intracellular caspase activity. Oxidative status was assessed by recording the intracellular glutathione concentration (GSH), the activities of the enzymes y -glutamyltransferase (y- GT) and glutathione-S-transferase (GST), and intracellular lipid peroxidation (MDA). Results, Neither apoptotic nor oxidative parameters were affected by culturing PBMNCs in medium containing RS up to 20 µM for 5 days, while the frequency of cells with intermediate permeability to PI (17% ± 5) increased at 50 µM of RS. Thus resveratrol was slightly toxic, but there was little apoptosis in these cells. Peripheral blood mononuclear cells were also grown first in medium plus RS for 24 h and then for 96 h in medium containing RS plus 10 mM of dR, an oxidant sugar that is apoptogenic for human lymphocytes. The apoptotic changes triggered by dR were counteracted by the phytoalexin in a dose-dependent manner, but RS activity was absent at the lowest concentration (5 µM) and significantly reduced at the highest concentration used (50 µM). In PBMNCs coincubated with 20 µM of RS and 10 mM of dR the antioxidant effect of RS manifested with a significant reduction of caspases-3, -8, y- GT, GST activities and MDA content. Conclusions, Peripheral blood mononuclear cells acquire antioxidant capacity when treated with RS. Grape resveratrol may make a useful dietary supplement for minimizing oxidative injury in immune-perturbed states and human chronic degenerative diseases. [source] Impaired Energetic Metabolism After Central Leptin Signaling Leads to Massive Appendicular Bone Loss in Hindlimb-Suspended Rats,JOURNAL OF BONE AND MINERAL RESEARCH, Issue 12 2008Aline Martin Abstract We previously showed in rats that the leptin effects on bone were dose dependent. Positive effects were observed when serum leptin concentration was in a physiological range. In contrast, important increases in serum leptin levels led to negative effects on bone formation similar to those reported after intracerebroventricular leptin administration in mice. To clarify whether leptin effects on bone depend on administration route and/or animal model, female rats were hindlimb unloaded or not and treated either with intracerebroventricular infusion of leptin or vehicle for 14 days. By increasing cerebrospinal fluid (CSF) leptin concentration, intracerebroventricular infusion of leptin significantly reduced food intake and consequently body weight, abdominal fat, and lean mass of the animals. Leptin infusion inhibited bone elongation over the 14 days and blunted cortical bone thickening at the femoral diaphysis site. Interestingly, leptin effects were site dependent in the cancellous bone envelopes, because tibia metaphysis BMD was lower and lumbar spine BMD was higher under intracerebroventricular leptin. Treated groups showed reduced bone remodeling independently of hindlimb unloading. Multiple downstream pathways were implicated in the mediation of these negative leptin effects on bone including not only stimulation of the sympathetic nervous system but also a decrease in somatotropic axis activity. Therefore, the intracerebroventricular leptin-induced bone loss could be largely related to the concurrent alteration of energetic and metabolic status. In summary, our study supports the hypothesis of a concentration-dependent balance between peripheral and central control of leptin on bone. [source] Vascular Function Measured by Fingertip Thermal Reactivity Is Impaired in Patients With Metabolic Syndrome and Diabetes MellitusJOURNAL OF CLINICAL HYPERTENSION, Issue 11 2009Naser Ahmadi MD Digital thermal monitoring (DTM) of vascular function has already been shown to correlate well with coronary artery calcium (CAC) score and coronary artery disease. To determine its utility in the metabolic syndrome (MS) and diabetes mellitus (DM), 233 asymptomatic patients with DM/MS but without coronary artery disease underwent DTM during and after 5 minutes of supra-systolic arm cuff inflation, as well as CAC. Post-cuff deflation adjusted temperature rebound (aTR) was lower in MS and DM compared with the normal group. The odds ratio of lowest vs upper 2 tertiles of aTR was 2.3 for MS and 3.5 for DM compared with the normal group, independent of age, sex, and risk factors. The area under the receiver operating characteristic curve to predict CAC ,100 was 0.69 for metabolic status (DM/MS), 0.79 for aTR, and 0.87 for both. This study demonstrates that vascular dysfunction measured by DTM is associated with DM/MS and could potentially be used to detect asymptomatic individuals with increased subclinical atherosclerosis. [source] Soluble urokinase plasminogen activator receptor is a marker of dysmetabolism in HIV-infected patients receiving highly active antiretroviral therapyJOURNAL OF MEDICAL VIROLOGY, Issue 2 2008Ove Andersen Abstract Circulating soluble urokinase plasminogen activator receptor (suPAR) reflects the immune and pro-inflammatory status of the HIV-infected patient. Highly active antiretroviral therapy (HAART) suppresses suPAR. Independent of the immune response to HAART, suPAR remains elevated in some HIV-infected patients, reflecting possibly a low-grade pro-inflammatory state. Low-grade inflammation has been implicated in insulin resistance and other features of dysmetabolism. Accordingly it is hypothesized that circulating suPAR is associated with the metabolic status of HIV-infected patients on HAART. Fasting plasma suPAR was determined in 36 normoglycaemic HIV-infected patients on HAART (n,=,18 lipodystrophic, and n,=,18 non-lipodystrophic) who had estimated insulin sensitivity (Rd) and non-oxidative glucose disposal (NOGM) by euglycaemic hyperinsulinaemic clamps, indirect calorimetry, and glucose tracer infusion. Five patients had circadian suPAR concentrations measured (24 hr, 20 min-intervals). suPAR and non-HDL-cholesterol were higher and Rd, NOGM, and limb fat were lower in lipodystrophic patients than in non-lipodystrophic patients (P,<,0.05). suPAR correlated positively with non-HDL-cholesterol and inversely with Rd, NOGM and limb fat (P,<,0.005, n,=,36). suPAR also correlated positively with leukocyte count and TNF-, (P,<,0.01, n,=,36) but not with IL-6. In multiple regression analyses suPAR was a stronger predictor of dysmetabolism than TNF-, and IL-6. Circadian suPAR did not systematically fluctuate. In conclusion, suPAR may reflect the metabolic status of the HIV-infected patient on HAART, thus linking low-grade inflammation, immune constitution, lipid and glucose metabolism, and fat redistribution. Circadian suPAR concentration appeared stable, suggesting that sampling schedule does not affect measurement. Further studies addressing whether suPAR predicts lipodystrophy and dysmetabolism in HIV-infected patients are warranted. J. Med. Virol. 80:209,216, 2008. © 2007 Wiley-Liss, Inc. [source] Glucose metabolism and proliferation in glia: role of astrocytic gap junctionsJOURNAL OF NEUROCHEMISTRY, Issue 4 2006Arantxa Tabernero Abstract Astrocytes play a well-established role in brain metabolism, being a key element in the capture of energetic compounds from the circulation and in their delivery to active neurons. Their metabolic status is affected in many pathological situations, such as gliomas, which are the most common brain tumors. This proliferative dysfunction is associated with changes in gap junctional communication, a property strongly developed in normal astrocytes studied both in vitro and in vivo. Here, we summarize and discuss the findings that have lead to the identification of a link between gap junctions, glucose uptake, and proliferation. Indeed, the inhibition of gap junctional communication is associated with an increase in glucose uptake due to a rapid change in the localization of both GLUT-1 and type I hexokinase. This effect persists due to the up-regulation of GLUT-1 and type I hexokinase and to the induction of GLUT-3 and type II hexokinase. In addition, cyclins D1 and D3 have been found to act as sensors of the inhibition of gap junctions and have been proposed to play the role of mediators in the mitogenic effect observed. Conversely, in C6 glioma cells, characterized by a low level of intercellular communication, an increase in gap junctional communication reduces glucose uptake by releasing type I and type II hexokinases from the mitochondria and decreases the exacerbated rate of proliferation due to the up-regulation of the Cdk inhibitors p21 and p27. Identification of the molecular actors involved in these pathways should allow the determination of potential therapeutic targets that could lead to the testing of alternative strategies to prevent, or at least slow down, the proliferation of glioma cells. [source] Dietary Composition and Weight Loss: Can We Individualize Dietary Prescriptions According to Insulin Sensitivity or Secretion Status?NUTRITION REVIEWS, Issue 10 2006Anastassios G. Pittas MD There is considerable uncertainty over whether any one dietary pattern broadly facilitates weight loss or maintenance of weight loss, and current dietary guidelines recommend a spectrum of dietary composition for the general population. However, emerging evidence suggests that specific dietary compositions may work better for identifiable groups of overweight/obese individuals based on their individual metabolic status. In particular, characteristics of insulin dynamics, such as insulin sensitivity or insulin secretion status, may interact with diets that vary in macronutrient composition to influence the weight loss achieved with a hypocaloric diet. [source] Short-term effects of coping skills training in school-age children with type 1 diabetesPEDIATRIC DIABETES, Issue 3pt2 2008Jodie M Ambrosino Objective:, Little is known about the use of psychosocial interventions in children younger than adolescence with type 1 diabetes (T1D) and their parents. We report preliminary short-term outcomes of a randomized controlled trial of coping skills training (CST) compared with group education (GE) in school-aged children with T1D and their parents. Methods:, One hundred and eleven children (range = 8,12 yr) with T1D for at least 6 months (3.71 ± 2.91 yr) were randomized to CST (55.6% female (F); 81.5% white (W)) or GE (69.7% F; 90.9% W). Children and parents (n = 87) who completed the intervention, baseline, 1- and 3-month data are included. Children completed measures of self-efficacy, coping, and quality of life; parents completed measures of family functioning (adaptability and cohesion), diabetes-related conflict, parent depression, and parent coping. Metabolic control was assessed with glycosylated hemoglobin A1c. Mixed-model repeated measures anova was used to analyze the data. Results:, CST and GE group composition was generally comparable. Children had good psychosocial adaptation and metabolic status. CST parents reported significantly more improvement in family adaptability compared with GE parents, and a trend was seen indicating that CST children showed greater improvement in life satisfaction than GE children. Effect sizes for this short-term follow-up period were small, but group participants were receptive to the intervention and reported positive gains. Conclusions:, In these preliminary results, CST and GE were more similar than different across multiple measure of psychosocial adaptation, although CST showed promising statistical trends for more adaptive family functioning and greater life satisfaction. Longer term follow-up is underway. [source] Contraceptive effects of Phyllanthus amarus in female micePHYTOTHERAPY RESEARCH, Issue 3 2001Mandava V. Rao Abstract Antifertility effects of an alcohol extract of the whole plant, Phyllanthus amarus at a dose of 100,mg/kg body weight for 30 days orally was investigated in cyclic adult female mice. The results revealed no significant change in absolute body and organ weights in extract-fed animals, indicating no alteration in general metabolic status. Further, feeding had no effect on haematological and clinical biochemical tests reflecting its non-toxicity. Similarly, uterine and ovarian biochemical tests showed no change except in 3, and 17, hydroxy steroid dehydrgenase (HSDs) levels, probably affecting hormonal conversions in the latter. Cohabited females with normal male mice were unable to become pregnant as their cyclicity was affected. These factors are related to a change in the hormonal milieu that governs female reproductive function. Upon withdrawal of feeding for 45 days, these effects were reversible. Thus this extract manifests a definite contraceptive effect in female mice. Copyright © 2001 John Wiley & Sons, Ltd. [source] Follicular, Oocyte and Embryo Features Related to Metabolic Status in Primiparous Lactating does Fed with High-Fibre Rearing DietsREPRODUCTION IN DOMESTIC ANIMALS, Issue 5 2010M Arias-Álvarez Contents Fertility of primiparous lactating does in the early postpartum (pp) period is very low mainly due to pronounced deficient energy intake, influencing oocyte and embryo developmental competence. The hypothesis used in this work was that high-lignin fibre diet supplied during the rearing period could increase feed intake and, consequently, improve the reproductive physiology and metabolic status of primiparous does in the early pp period. Diets with high-lignin [HL: 15.8% dry matter (DM)] or standard-lignin content (SL: 4.9% DM) were supplied until parturition time. No diet effects in serum oestradiol, progesterone concentrations and follicle categories were found in the histological study. Metaphase II rate of in vitro -matured oocytes was significantly higher in the SL vs the HL group (p < 0.001). Cytoplasmically degenerated oocytes (in terms of abnormal distribution of cortical granules) and follicular atresia rate were significantly lower in the SL group than in the HL group (p < 0.05 and p < 0.005 respectively). In addition, HL-fed does showed lower number of viable embryos and higher rate of retarded in vivo -recovered embryos compared with the SL group (p < 0.05). Neither in vitro embryo development of viable embryos nor conception rate was significantly different between groups. Feed intake increased during the first pregnancy in the HL group (p < 0.05), but not during early lactation. Serum protein, non-esterified fatty acid and leptin concentrations, as well as estimated body composition were similar in does fed with both diets. In conclusion, the enhancement of reproductive management by using highly lignified products in rearing diets does not seem to report physiological reproductive benefits affecting oocyte maturation rate and embryo viability in primiparous lactating does. [source] An unplanned delay between control visits influences the metabolic status in children with diabetes: an observational studyACTA PAEDIATRICA, Issue 5 2010P-E Kofoed Abstract Aim:, To evaluate whether the metabolic status had been influenced by the longer interval between visits because of a strike at the diabetes outpatient clinic. Methods:, During the strike from April 16 to June 15, 2008 all routine visits were cancelled. The HbA1c values from the last two visits prior to and the first two visits after the strike were compared with the values from the same periods the previous year. Danish speaking patients answered a questionnaire. Results:, For 155 children included, the mean HbA1c values before the strike were 8.1 and 8.1 (p = 0.39), while the value increased to 8.5 at the first visit (p < 0.0001) and 8.4 at the second visit following the strike (p = 0.14). No differences were found between any of the HbA1c values measured in 2007 (p > 0.05). Of the 152 questionnaires handed out, 113 (74.3%) were returned. Of these, 48 (42.5%) stated to have needed help, and 49 (43.3%) that their children's diabetes had deteriorated because of the strike. Conclusions:, In this unplanned study, the increase of 0.4% in mean HbA1c supports previous findings that the interval between visits at a diabetic clinic is important for ensuring an acceptable metabolic control in children with diabetes. [source] Hemoglobin A1c in obese children and adolescents who participated in a weight management programACTA PAEDIATRICA, Issue 1 2006Ivan Zador Abstract Aim: The objective of this study was to compare hemoglobin A1c values in non-diabetic obese children and adolescents before enrollment and after completion of a 12-wk weight management program. Methods: Seventeen children and adolescents, age 10.8±2.5 y (mean±1 SD), joined a multidisciplinary weight management program. Hemoglobin A1c and body mass index were measured at the start and at the completion of the program in each participant. Results: Body mass index at the start of the program was 34.3±6.4 kg/m2. Body mass index at the end of the program was 33±6.6 kg/m2 (p<0.05). Hemoglobin A1c at the beginning of the program was 5.3±0.3%. Hemoglobin A1c at the completion of the program was 5±0.2% (p<0.05). Conclusion: In this group of overweight children, hemoglobin A1c decreased significantly after participating in a multi-disciplinary weight loss program. These findings further point to the beneficial effect of lifestyle changes on the metabolic status of obese children. [source] | |||||||||||||