scholarly journals Co-exposure to endocrine disruptors: effect of bisphenol A and soy extract on glucose homeostasis and related metabolic disorders in male mice

2018 ◽  
Vol 52 (2) ◽  
pp. 76-84 ◽  
Author(s):  
Masoud Veissi ◽  
Sima Jafarirad ◽  
Akram Ahangarpour ◽  
Seyede Marjan Mohaghegh ◽  
Amal Saki Malehi
Keyword(s):  
Bisphenol A ◽  
Glucose Homeostasis ◽  
Metabolic Disorders ◽  
Fasting Blood Glucose ◽  
Serum Levels ◽  
Control Group ◽  
High Dose ◽  
Model Assessment ◽  
Low Doses ◽  
Male Mice

AbstractObjectives. Bisphenol A (BPA) is a xenoestrogen, which is commonly used as a monomer of polycarbonate plastics food containers and epoxy resins. Little is known about the interaction effects between xeno- and phyto- estrogens on glucose homeostasis or other metabolic disorders. The aim of this study was to examine effects of individual or combined exposure to low doses of BPA and soy extract on glucose metabolism in mice with the goal to establish its potential mechanisms.Methods. Fifty-four male mice were randomly divided into six groups. Mice were treated with soy extract at 60 or 150 mg/kg by daily gavage with or without subcutaneously administration of BPA (100 μg/kg/day) for four weeks at the same time, while the control group received a vehicle. Serum levels of fasting glucose, insulin, adiponectin, testosterone, malondialdehyde (MDA), and total antioxidant capacity (TAC) were measured. Homeostatic model assessment-β cell function (HOMA-β) index was also determined.Results. BPA exposure induced hyperglycemia and significantly reduced HOMA-β, serum levels of insulin, adiponectin, testosterone, and TAC and noticeably enhanced MDA in BPA group compared to control one. While treatment with soy extract in high dose (150 mg/kg) significantly decreased the levels of fasting blood glucose and MDA and notably improved the serum levels of insulin, HOMA-β, and TAC compared to BPA group.Conclusion. Soy extract may protect against some adverse effects of BPA. These findings represent the first report suggesting a potential effect between soy extract and BPA in low doses, however, further studies are needed to confirm these results.

scholarly journals Lipid profile of blood serum in mice under conditions of bisphenol a administration and vitamin a different suplementation

2019 ◽  
Vol 11 (2) ◽  
pp. 115-121
Author(s):  
Vira Borschovetska ◽  
Mykhailo Marchenko
Keyword(s):  
Vitamin A ◽  
Bisphenol A ◽  
Blood Serum ◽  
Lipid Profile ◽  
Glucose Intolerance ◽  
Glucose Homeostasis ◽  
Control Group ◽  
High Dose ◽  
Wild Type ◽  
Retinyl Acetate

The purpose of the study was to determine the lipid profile of blood serum and glucose tolerance in mice under conditions of bisphenol A (BPA) administration and different vitamin A consumption. The experimental animals were wild type mice with normal retinoids supplementation and transgenic mice (Lrat-/-) that are unable to esterify of retinol and do not have retinoid stores in liver. BPA, dissolved in corn oil (used as a vehicle), was administered per os daily for 3 days at a dose of 50 mg/kg body weight. Vitamin A overconsumption was modeled by administration of retinyl acetate in a very high dose of 3000 IU at 12 h intervals for 3 days. In the present study dyslipidemia was observed in the mice received 50 mg/kg BPA represented by significant higher triglycerides (at 1,4-fold), total cholesterol (at 2,2-fold), LDL-C, VLDL-C and HDL-C (46%, 39% and 2,8-fold respectively) than those mice of control group received vehicle. Administration of BPA also resulted in disruptions of glucose homeostasis, consisting of hyperglycemia (11±1.11 mmol/l) and glucose intolerance of animals. These BPA’s actions were attributed to its ability of binding to nonclassical membrane estrogen receptor as well as the G-protein coupled-receptor 30 (GPR30) and to act through nongenomic pathways. In knockout mice that did not have retinoid stores in the liver, indicators of both lipid profiles and glucose homeostasis were not significantly different from identical indicators of vehicle-treated mice. Additional 3000 IU retinyl acetate expose simultaneously with administration of 50 mg/kg BPA enhanced the lipogenic effect of xenobiotics in the wild type animals and induce its obesonic adverse effect in Lrat-/- mice. Thus, BPA exposure results in metabolic disorders consisting of hyperglycemia, glucose intolerance, hypercholesterolemia and hyperlipidemia. Retinoids enhanced the BPA action as an obesogen.

scholarly journals Effect of Agmatine on Non-Alcoholic Fatty Liver Disease Induced by Type 2 Diabetes in Rats

2021 ◽  
pp. 127-134
Author(s):  
Samar F. Miski ◽  
Mai A. Alim A. Sattar Ahmad ◽  
Ahmed Esmat
Keyword(s):  
Type 2 Diabetes ◽  
Molecular Mechanisms ◽  
Histopathological Examination ◽  
Fasting Blood Glucose ◽  
Serum Levels ◽  
Current Data ◽  
Hepatoprotective Effect ◽  
Control Group ◽  
Alcoholic Fatty Liver

Aim: To determine the potential hepatoprotective effect of Agmatine (AGM) on NAFLD-induced by Type 2 diabetes mellitus (T2DM) in rats. Study design:  Forty male Wistar rats weighing from (200 -250 g) were distributed at random into five groups (8 rats per group): group 1 as control; group 2 as untreated-T2DM; groups 3 & 4 as T2DM cotreated with AGM (40 & 80 mg/kg/d), while group 5 T2DM cotreated with Silymarin (100 mg/kg/d). Place and duration of study: Department of Pharmacology, Faculty of Medicine, king Abdul-Aziz University; between October 2020 and January 2021. Methodology: A rat model of T2DM with NAFLD complication was established by feeding rats with 10% fructose in drinking water and intraperitoneally injecting them with a single low dose of streptozotocin (STZ) (45mg/kg). The fasting blood glucose was detected, serum levels of hepatic biomarkers were all assessed. Moreover, histopathological examination was performed by hematoxylin and eosin (H&E) staining. Results: STZ induced T2DM in rats causes a significant (p<0.05, n=8) rise in serum levels of FBG, ALT, AST, TB, TC, TG, and LDL in comparison with the corresponding control group. Co-treatment with AGM (40 & 80 mg/kg) and silymarin significantly alleviated hyperglycemia and amended hepatic biomarkers that was reflected on improved histopathological changes. Conclusion: The current data suggest that oral AGM co-treatment could have a hepatoprotective effect against T2DM associated with NAFLD in rats. Further investigations are recommended to elucidate molecular mechanisms accountable for the useful effects of AGM on hepatocytes.

The effect of water-based rhythmic exercise training on glucose homeostasis and thyroid hormones in postmenopausal women with metabolic syndrome

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Hanieh Berahman ◽  
Alireza Elmieh ◽  
Mohammad Reza Fadaei chafy
Keyword(s):  
Metabolic Syndrome ◽  
Exercise Training ◽  
Postmenopausal Women ◽  
Glucose Homeostasis ◽  
Control Group ◽  
Model Assessment ◽  
Effect Of Water ◽  
Water Based ◽  
Rhythmic Exercise ◽  
Experimental Group

Abstract Objectives The present study aimed to explore the effect of water-based rhythmic exercise training on fasting blood sugar (FBS), homeostatic model assessment (HOMA), insulin, thyroid stimulating hormone (TSH), and T4 in postmenopausal women with metabolic syndrome. Methods In this clinical trial, 31 postmenopausal woman with metabolic syndrome aged 69.16 ± 2.02 years were randomly assigned to an experimental (n=16) and a control group (n=15). The training program was composed of 12 weeks of water-based rhythmic exercise training performed intermittently for 60 min three times a week. Before and after training, blood was analyzed for glucose homeostasis, T4, and TSH. Data were subjected to analysis by paired t-test and covariance analysis at the p<0.05 level. Results The exercise training intervention reduced the FBS and insulin significantly (p=0.000). The growth hormone (GH) index was increased significantly only in the experimental group (p=0.037) whereas no significant variations occurred in the insulin-like growth factor-1 (p=0.712). It was also found that TSH and T4 change in the experimental group as compared to the pre-test. Conclusions Water-based rhythmic exercise training may improve blood glucose homeostasis, TSH, and T4.

scholarly journals Multigenerational and transgenerational impact of paternal bisphenol A exposure on male fertility in a mouse model

2020 ◽  
Vol 35 (8) ◽  
pp. 1740-1752 ◽  
Author(s):  
Md Saidur Rahman ◽  
Won-Ki Pang ◽  
Do-Yeal Ryu ◽  
Yoo-Jin Park ◽  
Myung-Geol Pang
Keyword(s):  
Dna Methylation ◽  
Bisphenol A ◽  
Large Scale ◽  
Corn Oil ◽  
Sperm Count ◽  
Future Generations ◽  
High Dose ◽  
Male Mice ◽  
Paternal Exposure ◽  
Methylation Patterns

Abstract STUDY QUESTION How does paternal exposure to bisphenol A (BPA) affect the fertility of male offspring in mice in future generations? SUMMARY ANSWER Paternal exposure to BPA adversely affects spermatogenesis, several important sperm functions and DNA methylation patterns in spermatozoa, which have both multigenerational (in F0 and F1) and partial transgenerational (mainly noticed in F2, but F3) impacts on the fertility of the offspring. WHAT IS KNOWN ALREADY BPA, a synthetic endocrine disruptor, is used extensively to manufacture polycarbonate plastics and epoxy resins. Growing evidence suggests that exposure to BPA during the developmental stages results in atypical reproductive phenotypes that could persist for generations to come. STUDY DESIGN, SIZE, DURATION CD-1 male mice (F0) were treated with BPA (5 or 50 mg/kg body weight per day (bw/day)) or ethinylestradiol (EE) (0.4 μg/kg bw/day) for 6 weeks. Control mice were treated with vehicle (corn oil) only. The treated male mice were bred with untreated female mice to produce first filial generation (F1 offspring). The F2 and F3 offspring were produced similarly, without further exposure to BPA. PARTICIPANTS/MATERIALS, SETTING, METHODS Histological changes in the testis along with functional, biochemical and epigenetic (DNA methylation) properties of spermatozoa were investigated. Subsequently, each parameter of the F0–F3 generations was compared between BPA-treated mice and control mice. MAIN RESULTS AND THE ROLE OF CHANCE Paternal BPA exposure disrupted spermatogenesis by decreasing the size and number of testicular seminiferous epithelial cells, which eventually led to a decline in the total sperm count of F0–F2 offspring (P &lt; 0.05). We further showed that a high BPA dose decreased sperm motility in F0–F2 males by mediating the overproduction of reactive oxygen species (F0–F1) and decreasing intracellular ATP (F0–F2) in spermatozoa (P &lt; 0.05). These changes in spermatozoa were associated with altered global DNA methylation patterns in the spermatozoa of F0–F3 males (P &lt; 0.05). Furthermore, we noticed that BPA compromised sperm fertility in mice from the F0–F2 (in the both dose groups) and F3 generations (in the high-dose group only). The overall reproductive toxicity of BPA was equivalent to or higher (high dose) than that of the tested dose of EE. LARGE SCALE DATA N/A. LIMITATIONS, REASONS FOR CAUTION Further research is required to determine the variables (e.g. lowest BPA dose) that are capable of producing changes in sperm function and fertility in future generations. WIDER IMPLICATIONS OF THE FINDINGS These results may shed light on how occupational exposure to BPA can affect offspring fertility in humans. STUDY FUNDING/COMPETING INTEREST(S) This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (Grant No. NRF-2018R1A6A1A03025159). M.S.R. was supported by Korea Research Fellowship Program through the NRF funded by the Ministry of Science and ICT (Grant No. 2017H1D3A1A02013844). There are no competing interests.

scholarly journals EVALUATION OF OXIDATIVE STRESS AND ANTIOXIDANT STATUS BETWEEN TYPE II DIABETES PATIENTS AND HEALTHY POPULATIONS

2018 ◽  
Vol 11 (9) ◽  
pp. 264
Author(s):  
Sudharshan Reddy Nelli ◽  
Nilesh Kumar Sharma ◽  
Manoj Kumar P ◽  
Surya S Singh
Keyword(s):  
Blood Glucose ◽  
Type Ii Diabetes ◽  
Fasting Blood Glucose ◽  
Serum Levels ◽  
Diabetes Patient ◽  
Postprandial Blood Glucose ◽  
Control Group ◽  
Case Group ◽  
Type Ii ◽  
South Indian

Introduction: The aim of the present study is to profile the serum antioxidative enzymes, catalase (CAT), glutathione peroxidase (GPx), and superoxide dismutase (SOD) level in Type II diabetes mellitus patients in comparison to healthy volunteers in the South Indian population.Methodology: A prospective, observational, case–control study was conducted for 1 year with a total of 120 patients including 90 Type II diabetes patients (case group) and 30 healthy volunteers (control group). Blood was collected from these volunteers, and serum levels of CAT, GPx, and SOD were estimated. In addition, they were also monitored for the fasting blood glucose, glycated hemoglobin (HbA1c), and postprandial blood glucose. Data were statistically analyzed applying unpaired t-test and Pearson correlation with the statistical significance of p<0.05.Results: The diabetes patient group showed significant higher levels of glycated hemoglobin, fasting blood glucose and postprandial blood glucose (p<0.0001). There was asignificant lower level in the RBC levels of superoxide dismutase in case group compared to control group 3859.00±381.8 (mean+SD) and 5862.7±209.45 (mean+SD) Units per gram Hb, (t-value 27.35, p-Value <0.0001). Catalase and Glutathione peroxidase RBC levels also showed significant lower levels in the case group compared to the control group (catalase 212.7±19.08 (mean±SD) and 396.47±10.83 (mean±SD) Units per gram Hb; T value=50.07 and p<0.0001)(Glutathione peroxidase11.7 ±01.09 (mean +SD) and 18.6 ± 01.00 (mean +SD) Units per gram Hb; t value=30.26 and p<0.0001).Conclusion: A significant reduction in serum levels of antioxidative enzymes, CAT, GPx, and SOD was observed in the South Indian Type II diabetes patient population.

Electroacupuncture Mitigates Endothelial Dysfunction via Effects on the Pi3K/Akt Signalling Pathway in High Fat Diet-Induced Insulin-Resistant Rats

2018 ◽  
Vol 36 (3) ◽  
pp. 162-169 ◽  
Author(s):  
Danchun Lan ◽  
Nenggui Xu ◽  
Jian Sun ◽  
Zhixing Li ◽  
Rongzhen Liao ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Endothelial Dysfunction ◽  
Pancreatic Islet ◽  
High Fat Diet ◽  
Negative Impact ◽  
Fasting Blood Glucose ◽  
Signalling Pathway ◽  
Control Group ◽  
Model Assessment ◽  
High Fat

Objective To investigate the effect of electroacupuncture (EA) on endothelial dysfunction related to high fat diet (HFD)-induced insulin resistance through the phosphatidylinositol 3-kinase (PI3K)-protein kinase B (Akt) signalling pathway. Methods Twenty-four male Sprague-Dawley rats were fed a regular diet (Control group, n=8) or a HFD (n=16) for 12 weeks to induce an insulin resistance model. HFD-fed rats were divided into two groups that remained untreated (HFD group, n=8) or received electroacupuncture (HFD+EA group, n=8). EA was applied at PC6, ST36, SP6 and BL23. At the end of the experiment, fasting blood glucose (FBG), serum insulin (FINS), serum C-peptide (C-P) and homeostatic model assessment of insulin resistance (HOMA-IR) indices were determined. Pancreatic islet samples were subjected to histopathological examination. The thoracic aorta was immunostained with anti-rat insulin receptor substrate (IRS)-1, Akt and endothelial nitric oxide synthase (eNOS) antibodies. mRNA and protein expression of IRS-1, PI3K, Akt2 and eNOS in the vascular endothelium were determined by real-time PCR and Western blot analysis, respectively. Results The bodyweight increase of the HFD+EA group was smaller than that of the untreated HFD group. Compared with the HFD group, the levels of FBG, FINS, C-P and HOMA-IR in the HFD+EA group decreased significantly (P<0.01). Histopathological evaluation indicated that EA improved pancreatic islet inflammation. The expression of endothelial markers, such as IRS-1, PI3K, Akt2 and eNOS, decreased in the HFD group, while EA treatment appeared to ameliorate the negative impact of diet. Conclusion EA may improve insulin resistance and attenuate endothelial dysfunction, and therefore could play a potential role in the prevention or treatment of diabetic complications and cardiovascular disease through the PI3K/Akt signalling pathway.

Effect of high-dose vitamin D supplementation in combination with weight loss diet on glucose homeostasis, insulin resistance, and matrix metalloproteinases in obese subjects with vitamin D deficiency: a double-blind, placebo-controlled, randomized clinical trial

2020 ◽  
Vol 45 (10) ◽  
pp. 1092-1098
Author(s):  
Soodabeh Aliashrafi ◽  
Mehrangiz Ebrahimi-Mameghani ◽  
Mohammad Asghari Jafarabadi ◽  
Lida Lotfi-Dizaji ◽  
Elnaz Vaghef-Mehrabany ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Vitamin D ◽  
Weight Loss ◽  
Matrix Metalloproteinases ◽  
Vitamin D Deficiency ◽  
Glucose Homeostasis ◽  
Vitamin D Supplementation ◽  
High Dose ◽  
Model Assessment ◽  
Obese Subjects

As there is limited and inconsistent evidence in potential role of vitamin D on insulin resistance and matrix metalloproteinases, this study aimed to examine the effect of vitamin D supplementation on glucose homeostasis, insulin resistance, and matrix metalloproteinases in obese subjects with vitamin D deficiency. A total of 44 participants with serum 25-hydroxyvitamin D (25(OH)D) level ≤ 50 nmol/L and body mass index (BMI) 30–40 kg/m2 were randomly allocated into receiving weight reduction diet with either 50 000 IU vitamin D3 pearl (n = 22) or placebo (n = 22) once weekly for 12 weeks. Primary outcomes were changes in fasting serum glucose (FSG), homeostasis model assessment of insulin resistance (HOMA-IR), quantitative insulin sensitivity check index (QUICKI), and matrix metalloproteinases (MMPs). Secondary outcomes were changes in weight, BMI, 25(OH)D, calcium, phosphorous and parathyroid hormone (PTH). Sun exposure and dietary intakes were also assessed. Serum levels of 25(OH)D3 increased significantly with a simultaneous decrease in serum concentration of PTH in the vitamin D group. Weight, BMI, FSG, and MMP-9 decreased significantly in both groups, and there were significant differences in changes in weight, serum 25(OH)D3, PTH, and MMP-9 levels between the groups. Within- and between-groups analysis revealed no significant differences in serum calcium, phosphorous, serum insulin, HOMA-IR, QUICKI, and MMP-2 after intervention. Our results indicated that improvement in vitamin D status resulted in greater reductions in weight and MMP-9 during weight loss. These preliminary results are sufficient to warrant a bigger study group.

P5330Evaluating lipid-lowering and anti-atherogenic effect of injectable curcumin in a rabbit model of atherosclerosis

2019 ◽  
Vol 40 (Supplement_1) ◽  
Author(s):  
A A Momtazi-Borojeni ◽  
M Banach ◽  
M Majeed ◽  
A Sahebkar
Keyword(s):  
Low Dose ◽  
White Male ◽  
Atherosclerotic Lesion ◽  
Density Lipoprotein ◽  
Serum Levels ◽  
Lipoprotein Cholesterol ◽  
Lipid Lowering ◽  
Control Group ◽  
High Dose ◽  
Base Line

Abstract Background and purpose The present study was aimed to evaluate lipid-lowering and anti-atherogenic effect of an intravenous (IV) curcumin in the rabbit fed high cholesterol diet (HCD). Methods New Zealand white male rabbits (4–6 months old, n=25, weight 2.286±0.256 kg)were fed on a normal chow enriched with 0.5% (w/w) cholesterol for 5 weeks. Atherosclerotic rabbits were randomly divided into three group, including a control group receiving intravenous (IV) injection of saline buffer, two treatment groups receiving IV injection of curcumin at two different dosages, 1and 10 mg/kg/week, for 4 weeks. Blood samples were collected from fasted rabbits at pre- (week 5) and post-treatment (week 11) points for analysis of serum lipid levels, including low-density lipoprotein cholesterol (LDL-c), high-density lipoprotein cholesterol (HDL-c), triglyceride (TG), and total cholesterol (TC). Aortic arch atherosclerotic lesions were assessed using hematoxylin and eosin (H&E) staining. Results To evaluate curcumin's effects on the hyperlipidemic states and atherosclerosis plaque, HCD-fed rabbits were weekly treated with the injectable curcumin at the low (1mg/kg/week) and high (10 mg/kg/week) doses by 4 weeks. At week 4 in compared with the control group, low-dose curcumin could reduce serum levels of LDL-c, HDL-c, TG, and TC by −6.22% ±1.77, −35.24% ±12.49, −29.84% ±10.14, −14.19% ±5.19, respectively. In the case of high-dose curcumin, serum levels of LDL-c, HDL-c, TG, and TC were changed by −44.36%±3.24, 14.05% ±6.39, −25.92% ±5.57, −56.59% ±10.22, respectively, when compared with the control group at week 4. Low-dose curcumin after 4 weeks' treatment could reduce serum levels LDL-c, HDL-c, TG, and TC up to 103±28 mg/dL, 18.33±4.66 mg/dL, 97.5±31 mg/dL, and 356.5±19.5 mg/dL, respectively, when compared with the base line levels (week 0). High-dose curcumin after 4 weeks' treatment could decrease serum levels of LDL-c, HDL-c, TG, HDL-c, and TC up to 207±17.04 mg/dL, 15.5±0.5 mg/dL, 333±40 mg/dL, and 514.5±22.23 mg/dL, respectively (Figure). H&E staining declared that atherosclerotic lesion grades were significantly lower in the curcumin-treated groups than the control group. Changes of lipids in rabbits on curcumin Conclusions The injectable curcumin at the low (1mg/kg) and high (10 mg/kg) could significantly improve dyslipidemia and alleviate atherosclerotic lesion in HCD-induced atherosclerotic rabbits.

scholarly journals Sex-Specific Differences in the Gut Microbiome in Response to Dietary Fiber Supplementation in IL-10-Deficient Mice

Nutrients ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 2088
Author(s):  
Zhengxiao Zhang ◽  
Jae Eun Hyun ◽  
Aducio Thiesen ◽  
Heekuk Park ◽  
Naomi Hotte ◽  
...  
Keyword(s):  
Dietary Fiber ◽  
Alpha Diversity ◽  
Control Group ◽  
High Dose ◽  
Male Mice ◽  
Microbial Composition ◽  
Murine Colitis ◽  
Host Sex ◽  
Inflammatory Bowel ◽  
High Level

There is growing interest in studying dietary fiber to stimulate microbiome changes that might prevent or alleviate inflammatory bowel disease (IBD). However, dietary fiber effects have shown varying degrees of efficacy, for reasons that are unclear. This study examined whether the effects of isomaltodextrin on gut microbiota and IBD were dependent on dose or host sex, using an Interleukin (IL)-10 deficient murine colitis model. After 12 weeks, colonic IL-12p70 was depressed in male mice receiving high-dose isomaltodextrin supplementation compared to the control group (p = 0.04). Male mice receiving high-dose isomaltodextrin exhibited changes in microbial alpha-diversity, including enhanced richness and evenness (p = 0.01) and limited reduction in the relative abundance of Coprococcus (q = 0.08), compared to the control group. These microbial compositional changes were negatively associated with IL-12p70 levels in the male group (rs ≤ −0.51, q ≤ 0.08). In contrast, female mice receiving isomaltodextrin displayed a reduction in alpha-diversity and Coprococcus abundance and a high level of IL-12p70, as did the control group. Together, these results indicate that isomaltodextrin altered the gut microbial composition linking specific immune-regulatory cytokine responses, while the interactions among fiber, microbiota and immune response were dose dependent and largely sex specific. The results further indicate that interactions between environmental and host factors can affect microbiome manipulation in the host.

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