Groups Of Diabetic Rats Research Articles

FINERENONE PREVENTS RENAL AND VASCULAR DAMAGE IN A NOVEL MODEL OF TYPE 1 DIABETES MELLITUS

Objective: The non-steroidal mineralocorticoid receptor antagonist (MRA), finerenone (FIN) improves renal and cardiovascular outcomes in patients with chronic kidney disease (CKD) in type 2 diabetes (T2D). We explored the effects of FIN in a novel model of CKD in type 1 diabetes (T1D). Design and method: We employed the Munich Wistar Frömter (MWF) rat model of non-diabetic CKD with mild hypertension and albuminuria to generate a novel model of CKD with T1D. This was achieved by an intra-peritoneal injection of streptozotocin (15 mg/kg) and additional exposure to a high-fat/high-sucrose diet. Oral treatment with FIN (10 mg/kg/day in rat chow) in diabetic animals (MWF-DKD-FIN) was compared to a group of diabetic rats receiving no treatment (MWF-DKD-Control) and a group of non-diabetic untreated MWF rats (MWF). Dietary exposure with or without pharmacological treatment was maintained for 6 weeks (n = 7–10 animals per group). Results: After 6 weeks, MWF-DKD-Control and MWF-DKD-FIN exhibited significantly elevated blood glucose levels (271.7 ± 67.1 mg/dl and 266.3 ± 46.8 mg/dl) as compared to MWF (110.3 ± 4.4 mg/dl; p < 0.05). MWF-DKD-Control showed a 10-fold higher expression of renal damage markers Kim-1 and Ngal compared to MWF. This upregulation was significantly suppressed in MWF-DKD-FIN. FIN treatment resulted in a significant reduction of blood pressure and pulse wave velocity compared to MWF-DKD-Control (p < 0.05). Vascular function studies showed an improvement in endothelial function in MWF-DKD-FIN compared to MWF-DKD-Control due to a reduction in pro-contractile prostaglandins, oxidative stress, and inflammatory cytokines (including IL-1, IL-6, TNFalpha and TGFbeta). FIN induced no changes in blood glucose levels, glucose tolerance or the increase in HOMA index compared to MWF-DKD-Control. Conclusions: Our data show that treatment with FIN improves renal and vascular damage in a new rat model of CKD with T1D. These beneficial effects associated with a reduction in inflammation and oxidative stress and was independent from changes in glucose homeostasis.

Cytoprotective Effects of Pancreatic Cells of Interleukin 1 Inhibitors (DIACEREIN) on Glucose Homeostasis and Beta Cell in Diabetic Rat Model

Objective: This study was conducted to evaluate the pancreatic cells regeneration with interleukin 1 inhibitor drugs (diacerein) of natural source. Material & Methods: This experimental study was conducted at the Isra University animal house in which 60 albino rats were divided into 4 subgroups of 10 in each. Experimental group of them given alloxan and induced diabetes. interleukin 1 inhibitor (diacerein) was given to 2 experimental groups, diabetic experimental C and D respectively, in dosages of 30 mg/kg and 50 mg/kg for 21 days. After the completion of the experiment, rats were sacrificed by cervical dislocation. The pancreas of rats was removed and set in 10% formalin for fixation after being washed with normal saline. For appropriate fixation, the slides were placed on a hot plate. Hematoxylin and eosin were used to stain the slides, and under the light microscope, stained slides were examined. The study proforma was used to document all of the data. Results: Diabetic rats showed sustained hyperglycemia, total destruction of beta cells histologically. However, diabetic group rats showed degenerative changes of the pancreatic characterized by ultra-structural changes, shrinkage of beta islet cells, and showing RBCs and fibrosis of regions of endocrine glandular epithelial cells. Beta cells were showing mild regeneration with proliferative changes in the beta cells of islets as well as dilatation of ducts seen in treated groups with interleukin 1 inhibitor with lab findings of improving to euglycemic levels. Conclusions: Pancreatic tissue of diabetic rats showed ultra-structural changes and regeneration, as well as reduction in inflammatory markers as well as obvious effects on D.M., hence would be used as a cheap, safe drug to control and reduce the oxidative injury of pancreatic cells and its regenerative effects. Keywords: Diacerein, interleukin 1 inhibitor, regeneration of pancreas hyperglycemia, diabetes mellitus

Heart Rate Fragmentation in Rats with Streptozotocin‐induced Diabetes

Heart rate fragmentation (HRF) is a recently proposed approach to evaluate sino‐atrial instability characterized by the presence of numerous inflections points in a series of successive values of RR intervals (RRi). HRF has been shown to be increased in aging and coronary diseases and seems to be linked to the risk of life‐threatening cardiovascular events and death. We recently demonstrated that cardiac autonomic modulation in involved in HRF in rats. Moreover, HRF is increased in a rat model of heart failure. Diabetes mellitus (DM) markedly alters HRV indices and might affect HRF as well. Therefore, we hypothesize that HRF is altered in streptozotocin‐ (STZ) induced diabetic rats. Male Sprague‐Dawley rats were injected with STZ (50 mg/kg), or vehicle (citrate buffer) into penile vein. Development of diabetes was confirmed 72h after STZ by the presence of hyperglycemia (> 350 mg/dL). Electrocardiographic (ECG) recordings were performed in conscious rats, 7 days (acute) or 4 weeks (chronic) after STZ or vehicle administration. Series of RR intervals were generated and processed by the customized software PyBios as follows: RRi values were symbolized as “‐1”, “0,” or “1” when the differences between successive RRi were negative, null, or positive, respectively. Transitions between symbols “‐1” and “1” were labeled as “hard” (H) inflection points, while those between “‐1” (or “1”) and “0” were labeled as “soft” (S) inflection points. The percentage of inflection points (PIP) was quantified, as well as sequences of 4 consecutive symbols, so‐called “words”, computing the occurrence of words with zero (W0), one (W1), two (W2), or three (W3) inflections points. The occurrence of words with only hard (WH) or only soft transitions (WS) were also quantified. Both groups of diabetic rats were bradycardic as compared to their control counterparts. Data of HRF are shown in the table below. Occurrences (%, mean ± SEM) of PIP, words with 0 to 3 inflection points, and words with only soft or hard transitions of symbols. As hypothesized, diabetes affects HRF, increasing fragmented indices (PIP, W3 and WH) and decreasing fluent ones (W1 and WS). Moreover, our results showed that changes in HRF due to diabetes in this model is time‐dependent. In addition to traditional methods of analyzing heart rate variability, HRF is a new method that can contribute to the diagnosis and prognosis of cardiovascular diseases in diabetic patients. Further studies are necessary to understand better the mechanisms involved in our findings.

The Effect of Hydroalcoholic Seed Extract of Securigera Securidaca on the Hepatic Renin-Angiotensin System in the Streptozotocin-Induced Diabetic Animal Model

Background: The aim of the study was to investigate the effect of hydroalcoholic seed extract of Securigera securidaca (S. securidaca) (HESS) on liver local reninangiotensin system (RAS) in streptozotocin-induced diabetic rats. Methods: Three groups of diabetic male Wistar rats were treated with different doses of HESS (100, 200, 400 mg/Kg-BW), and the results were compared with diabetic and healthy control groups. To test the effects of HESS on liver local RAS as well as its alternative pathway, the tissue levels of renin, angiotensin-converting enzyme (ACE), ACE2, angiotensin-II (Ang-II), and Ang-(1-7) were measured. The oxidative state of liver tissue was evaluated by biomarkers of malondialdehyde (MDA), total oxidant status (TOS), and total antioxidant status (TAS). Due to the association between local RAS activity and tissue inflammation, the production of interleukins (IL) IL-1, IL-6, tumor necrosis factor alfa (TNF-a), and IL-10 in the liver was assayed in the experimental group. Results: Dose-dependent effects of HESS showed that the highest dose of the extract had a reducing effect on the hepatic levels of local RAS components including angiotensinogen, ACE, and Ang-II. Surprisingly, despite the decrease in tissue level of ACE2, an increase in Ang-(1-7) tissue concentration was observed. Decreased local RAS activity through treatment with the highest dose of HESS was associated with decreased tissue levels of proinflammatory cytokines (IL-1, IL-6, TNF-a), and increased anti-inflammatory cytokine (IL-10). Most of the effects of the extract are attributed to its antioxidant properties. Conclusions: S. securidaca seed can be suggested as a suitable drug supplement to prevent hepatic complications of diabetes.

The Role of Gum Arabic for a Protective Kidney Dysfunction Induced Gentamicin on Diabetes Rats

The target of this study was to estimate Gum Arabic for total phenols and flavonoids. In addition to antioxidant activities, estimate gum Arabic for total phenols and flavonoids. In addition to antioxidant activities, the problem of studying the potential effect of experimental diabetes kidney failure induced by gentamicin and the effect of taking gum Arabic. The results were observed to increase the content of phenols and total flavonoids. The method of study was that diabetic rats groups were fed on a basal diet, and intake of drinking water separately at concentrations of 5, 10, 15, and 20 g gum Arabic dissolved in 100 ml of water/day indicated that the lipid profile gradually decreased in triglycerides from group (1) was 128.30 mg/dL to group (4) was 77.53, total cholesterol-lowering from 163.18 mg/dL to 111.19 mg/dL, LDL reducing from 101.61 mg/dL to 37.83 mg/dL, VLDL lessening from 25.73 mg/dL to 15.51 mg/dL, and glucose reduced from 192.52 mg/dL to 111.24 mg/dL. and glucose became less from 192.52 mg/dL to 111.24 mg/dL. The kidney functions indicated to creatinine, urea, uric acid, blood urea nitrogen, and bilirubin were decreased from 1.34, 0.95, 2.24, 45.61, and 0.66 mg/dl in group (1) to 0.78, 29.84, 2.12, 16.25, and 018 mg/dL in group (4), respectively, when taking Gum Arabic. Furthermore, in the treatment group with Gum Arabic at different doses, the results could be noticed that sodium and calcium were gradually increased, and there was gradual reduction in potassium, phosphor, and magnesium. The results found that the treatment with GA had lowered the effects of gentamicin and streptozotocin, as evidenced by improvement of the lipids profile, kidney function, some minerals in serum, and antioxidant enzyme in kidney tissue, which may be referred to as its content of antioxidant active ingredients. Therefore, it is recommended that Gum Arabic is a beneficial dietary tool in reducing the advancement of chronic kidney disease in diabetic rats.

Hepatoprotective Properties of Sarcocephalus latifolius Extract in Hyperglycemic Rat Model

Currently, there is a need for safe, effective, and less costly antidiabetic medications, and investigating medicinal plants for new antidiabetic medication is gaining increased attention. Diabetes mellitus is a chronic metabolic disease associated with hyperglycemia, dyslipidemia, and hepatocellular damage. Sarcocephalus latifolius (family Rubiaceae) has been widely explored in ethnomedicine for the treatment and management of various disorders. The biochemical, hepatoprotective, and histological effects of aqueous-ethanolic leaf extract of S. latifolius in alloxan-induced diabetic rats were investigated. Thirty (30) juvenile male Wistar rats were placed into six groups, each with five rats: Normal rats made up Group 1, while diabetic rats in Groups 2–4 were given 200, 400, and 800 mg/Kg body weight of aqueous-ethanolic leaf extract, respectively; diabetic rats in Group 5 were given a standard anti-diabetic drug (0.2 mg/kg glibenclamide), and diabetic rats in Group 6 were left untreated. When compared to control rats, Alloxan induction led to a significant elevation in plasma glucose level, liver enzymes, low density lipoprotein (LDL), total cholesterol (TC), and triglycerides (TG), but a significant decrease in high density lipoprotein (HDL). The alterations in the following parameters were returned to normal levels when the diabetic rats were administered S. latifolius extract. The results indicate that S. latifolius showed hypoglycemic and hypolipidemic potentials, and may serve as a remedy for the management of diabetes.
 Keywords: Sarcocephalus latifolius, Diabetes, Albino rats, Alloxan, Liver

Fractions of Lawsonia inermis Linn leaves improved the histomorphological appearance of major organs involved in diabetic complications

Diabetes mellitus (DM) is clinically known as diverse sets of biochemical syndromes with a basic symptom of glucose intolerance and is a major cause of morbidity and mortality worldwide. Diabetes mellitus exclusively disrupts glucose metabolism in various tissues and organs leading to complications such as retinopathy, nephropathy and brain micro-infarcts. This study investigated the positive modulatory effect of Lawsonia inermis Linn leaves on major organs involved in diabetic complications in Wister rats experimentally induced by type 1 diabetes using streptozocine. Lawsonia inermis leaves were partitioned using N-hexane, ethyl acetate and methanol. Fractions obtained were assessed for their modulatory potential. Seven groups of diabetic rats (n=5) were orally administered 100mg/kg of each of the three partitioned fractions, metformin (500mg/kg), glibenclamide (5mg/kg), while untreated hyperglycaemic and normoglycaemic rats received distilled water (ad libitum) daily for 28 days. Mean relative organ weight of the brain, heart, kidney, pancreas and liver increased significantly (p<0.05) in untreated diabetic rats when compared to Lawsonia inermis treated rats and non-diabetic control. Diabetic treated rats showed non-significant (p>0.05) increased weight in all the organs except the pancreas that decreased non-significantly when compared to normoglycemic rats. The histopathology results showed that Lawsonia inermis improved the organ damage seen in diabetic complications through prevention of organomegaly and improvement in histoarchitectural appearance that is devoid of lesions when compared to untreated diabetic control with various lesions. Conclusively, Lawsonia inermis Linn leaves improve significant reduction in organ damage during course of Type 1 diabetes mellitus.

Turmeric improves glycemic control and exhibits insulin secretagogue activity in Alloxan induced diabetic rat model.

Objective: To analyze effects of turmeric in glycemic control and insulin secretagogue activity in alloxan induced diabetic rat model. Study Design: Experimental Study. Setting: Department of Surgery, Liaquat University of Medical and Health Sciences, Jamshoro/Hyderabad. Period: February 2019 to January 2020. Material & Methods: A sample of 100 adult male rats was selected according to inclusion criteria. Rats were grouped as negative control (group A), positive control – diabetic rats (group B), and experimental groups C – E. Group C- was diabetic rat + 100 mg ethanol extract of turmeric, Group D- was diabetic rat + 300 mg ethanol extract of turmeric, and Group E- was diabetic rat + 500 mg ethanol extract of turmeric. Overnight fasting rats were administered Alloxan 120 mg/Kg body weight intraperitoneally (i.p) by pinching abdominal wall under skin for the induction of diabetes mellitus in the rats. Blood glucose, glycated hemoglobin A1 (A1C) and serum insulin were analyzed. Statistical analysis was performed on SPSS package (ver. 21.0, IBM, incorporation, USA) at p≤ 0.05 (Confidence interval 95%). Results: Blood glucose, A1C and serum Insulin levels were improved in turmeric treated experimental rats. Significant reduction in blood glucose and A1C were found in turmeric treated rats (P=0.0001). Serum insulin levels were found increased in turmeric treated experimental groups C – E compared to positive control B (P=0.0001). Conclusion: Administration of turmeric significantly reduced the blood glucose and A1C with increased serum insulin levels in alloxan induced diabetic rats.

Hydrogel films of methanolic Mentha piperita extract and silver nanoparticles enhance wound healing in rats with diabetes Type I

Poor wound healing is considered an obstacle in diabetics, which requires effective therapy. Our goal was to investigate the combined effect of mint and silver nanoparticle hydrogel films as wound-healing agents in diabetic rats. Thirty rats were arranged into five groups. The hydrogel films were prepared through an eco-friendly method, excluding toxic solvents and diluents. Gel 1 and fucidin showed complete wound-healing effect on the 22nd day, while Gel 2 showed a faster effect on the 16th day, all compared to group 1 which healed in 25 days. Diabetic rats in group 2 healed beyond 25 days. Moreover, Gel 1 and Gel 2 decreased the fasting blood glucose. Gel 2 enhances wound healing in diabetic rats via multiple mechanisms of action, possibly due to the ability of mint and silver nanoparticles to sustain their concentration at the wound site with limited toxicity. Abbreviations: CO: castor oil; CS: corn starch; DIW: deionized water; H: hydrogel film; H-MME: hydrogel film developed with CS, PVA, CO and MME; H-SMME: hydrogel film developed with CS, PVA, CO and MME/ SNP; MME: methanolic mint extract; PVA: polyvinyl alcohol; SNP: silver nanoparticles; STZ: streptozotocin

Comparative Assessment of Portulaca oleracea, Omega-3 Fatty Acids, and Combination of Selenium Plus Vitamin E on Histopathology of Pancreas in Diabetic Rats

Introduction: Antidiabetic effects of Portulaca oleracea (PO) plant, omega-3 and a combination of Selenium and Vitamin E have been reported which could compensate for defective insulin release and enhance antioxidant levels. The purpose of the present study was to compare the serum glucose levels and histopathological effects on PO, Omega-3, and a combination of Selenium and Vitamin E in the pancreas of adult male diabetic rats.
 Materials and methods: A total of 96 adult male Wistar rats, weighing approximately 220 g were used. The rats were divided into four groups with 4 replicates for each group accidentally. The rats were diabetic via a single injection of streptozotocin solution (60 mg/kg, IP injection). The groups contained the control group of diabetic rats, which received the standard ration daily, the second group of diabetic rats was fed the standard ration plus Portulaca oleracea extract (1.5 mg/kg/day/orally), the third group of diabetic rats was fed standard ration plus omega 3 (500 mg/kg/day/orally), the fourth group of diabetic rats was fed standard ration plus Vitamin E (400 iu/kg/day/orally) and Selenium (0.5 mg/kg/day/orally) for a period of 14 days. At the end of the study, the samples were taken for histopathological investigation of the pancreas and serum glucose levels. The mean diameter of pancreatic islets and percentage of beta and alpha cells were calculated in all groups.
 Results: The percentage of alpha cells in the treatment groups was higher than in the control group. The percentage of beta cells in the third group was higher than in the fourth group and control group. The mean diameter of pancreatic islets in omega-3-treated rats was higher than in other groups. The insulin level increased in treated rats in comparison with the rats that were not treated significantly.
 Conclusion: Diabetic male rats treated with omega-3 showed more positive effects on pancreatic islets and blood glucose compared to other treatment groups.

Synclisia scabrida protects against oxidative stress, hepatotoxicity and hyperglycaemia in alloxan-induced diabetic rats.

Synclisia scabrida is commonly used in traditional medical practices for the management of diseases like diabetes and its complications. This study seeks to establish a scientific rationale for this practice. Thirty Wistar rats were randomly and equally grouped into six. Alloxan was used to induce diabetes in the rats in groups 2 to 6. The diabetic rats in group 2 were treated with glibenclamide, while those in group 3 were not treated. Also, the diabetic rats in groups 4, 5 and 6 were, respectively, treated with the ethanol extracts of the stem, root and leaf of S. scabrida. After 28days of treatment, blood and organ samples were collected for biochemical studies. S. scabrida possesses high amounts of useful phytochemicals. It also exhibits high total reducing capacity, FRAP activity, DPPH and ABTS scavenging ability. The inhibition of the α-glucosidase and α-amylase activities by the methanol extracts of S. scabrida stem, leaf and root were significantly (p < 0.05) higher than that of glibenclamide. Administration of S. scabrida extracts to the alloxan-induced diabetic rats caused significant (p < 0.05) decreases in the blood glucose, total bilirubin, AST, ALT, and ALP of the treated groups as compared to that of the untreated group. Treatment with the extracts also resulted in significantly (p < 0.05) lower LPO and significantly (p < 0.05) higher levels of GSH, SOD and CAT. S. scabrida extracts exhibited antioxidative, hepatoprotective and hypoglycaemic properties which are similar to that of the standard drug, glibenclamide.

ANTIDIABETIC AND ANTIOXIDANT ACTIVITIES OF POLYHERBAL FORMULATION IN ALLOXAN INDUCED DIABETIC WISTAR RAT

Objective: To investigate the effect of polyherb (formulated by some plants) on physiological, biochemical alterations and oxidative stress induced by experimental diabetes in rats.&#x0D; Materials and methods: Twenty female albino Wistar rats were randomly divided into 4 groups (n=5); Control, Polyherb, diabetic rats and Diabetic rats treated with polyherb. All types of treatments were given to rats orally for 21 days.&#x0D; Results: In vitro phytochemical analysis results revealed that polyherb contains phenols, flavonoids, alkaloids, terpenoids, tannins and steroids. In vivo results, in diabetic group showed an alteration in lipid profile and biochemical parameters. While, results showed an increase in MDA level and a decrease in GSH and SOD levels compared to control. Moreover, the hematological parameters revealed that Diabetes induce a significant diminution (P&lt;0.01) of RBC, MCV and HCT levels. In the other hand, histopathological analysis noted an alteration in pancreas tissues of diabetic rats group compared to control. However, treatment of Diabetic rats by Polyherb ensured a partial amelioration and correction of the previous parameters.&#x0D; Conclusion: Use of Polyherb appears to be the dominant limited of development and complications of diabetes which can have a benefic effect against others diseases which oxidative stress plays an important role.

Comparative Study of Metformin, N-Acetylcysteine and L-Arginine on Hyperglycemia in Streptozotocin-Induced Diabetic Rats

Diabetes mellitus (DM) is a chronic metabolic syndrome which results from deficiencies/defects in the pancreatic insulin secretions or insulin action on the target tissues. Purpose: To compare the beneficial effects of Metformin, N -acetylcysteine and L-arginine on dyslipidemia and hyperglycemia in Streptozotocin-induced diabetic rats. Study Design: Randomized controlled trial. Methodology: A total of 35 rats were used with 5 rats randomly allocated in 7 groups. Diabetic model was created by using streptozotocin (35 mg/kg) single dose intraperitoneal (IP). After 48 hours the animals with blood sugar concentration more than 300 mg/dl were considered diabetic. First group and second group were controls with Diabetic Mellitus (DM) rats. The group three, four and five with diabetic rats were given Metformin, N -acetylcysteine (NAC) and L-arginine (L-Arg) respectively. The sixth group of diabetic rats was given combination of Metformin and NAC while the seventh group of diabetic rats was given Metformin and L-Arg. All groups were treated for four weeks. At the end of the experimental period, groups were compared for fasting blood glucose. Statistical analysis: SPSS 25.0 statistical software was used to analyze the whole data. The difference between all the groups was analyzed using One-Way Analysis of Variance (ANOVA). Results: Significant improvement, with regards to the BSF test in L-Arginine Group, Metformin plus L-Arginine Group and the Metformin plus N-acetylcysteine group. Conclusion: It was concluded that in streptozotocin induced diabetic model, hyperglycaemia was significantly attenuated by the use of novel antioxidants; L-Arginine and N-acetylcysteine. Keywords: Hyperglycemia, L-arginine, Metformin, N-acetylcysteine and Streptozotocin.

Compensatory Role of Insulin in the Extinction but Not Reinstatement of Morphine-Induced Conditioned Place Preference in the Streptozotocin-Induced Diabetic Rats.

Insulin receptors are distributed in the whole brain, including different parts of the reward circuit that modulate dopamine as the primary neurotransmitter implicated in addiction. The goal of the current study was to illuminate the role of insulin in the extinction period and reinstatement of morphine-induced conditioned place preference (CPP) in the naïve and diabetic rats. One hundred and twelve male rats were randomly divided into two naïve and diabetic groups. Diabetes was induced by one dose administration of streptozotocin (STZ; 60mg/kg; IP) ten days before the conditioning procedure. To evaluate the insulin's role in the duration of extinction period of morphine-CPP, naïve and diabetic rats received insulin (10 U/kg; IP) before each morphine injection (5mg/kg; sc) during the 3-day conditioning phase. All rats that passed the conditioning phase and then underwent the extinction period. Morphine priming-induced reinstatement was determined in both naïve and diabetic rats by injection of different ineffective doses of morphine (0.5 and 1mg/kg; sc) in extinguished rats. In the following experiments, three groups of diabetic rats received insulin during the conditioning, expression, or reinstatement phase to illustrate insulin's effect on the morphine-induced reinstatement and the duration of the extinction period (insulin was only treated during the acquisition phase). The results showed that the extinction period and reinstatement of morphine were potentiated in the STZ-induced diabetic rats. The obtained findings also revealed that insulin replacement shortened the extinction period of morphine-induced CPP in STZ-diabetic rats. However, insulin replacements in conditioning, expression, and reinstatement phases did not affect morphine priming-induced reinstatement in diabetic animals.

The effect of Kappaphycus alvarezii active fraction on oxidative stress and inflammation in streptozotocin and nicotinamide-induced diabetic rats

BackgroundHigh glucose concentration increases the glycation process which leads to oxidative stress and inflammation, that can cause complications in diabetes. Several medicinal plants have been used in the treatment of diabetes and its complications. One of them is Kappaphycus alvarezii, an algae that has known antidiabetic abilities. This study aimed to examine the effect of K. alvarezii active fraction on plasma hydrogen peroxide (H2O2) and Tumor Necrosis Factor α (TNFα) levels, renal NADPH oxidase 4 (NOX4) and Nuclear Factor κ B (NFκB) gene expressions.MethodsActive fraction was obtained from bioassay-guided fractionation with antiglycation ability. In vivo study was performed on twenty Wistar male rats. The level of H2O2 was measured using H2O2 Assay Kit, the Optical Density value measured using spectrophotometer at a wavelength of 405 nm. Plasma TNFα level was measured using ELISA. Renal NOX4 and NFκB gene expression was analyzed using qPCR.ResultsActive fraction significantly reduced plasma H2O2 but not TNFα levels. Furthermore, renal NOX4 gene expression was lower in the diabetic rat group treated with active fraction compared to the untreated group but not NFκB gene expression.ConclusionsK. alvarezii active fraction has an activity to reduce plasma H2O2 as well as renal NOX4 gene expression. Therefore, this fraction could be developed as a potential candidate for diabetes treatment through oxidative stress mechanisms.

Technological, Sensory, and Hypoglycemic Effects of Quinoa Flour Incorporation into Biscuits

Background. Biscuits are consumed by all of society in the world. Incorporation of different ratios of quinoa flour into wheat flour for the production of biscuits is needed for the production of functional foods. Objective. This study aimed to evaluate the incorporation of 12.5% or 25% quinoa flour into biscuit production, evaluate rheological and sensory characteristics, and investigate the effect of the consumption of 20% cooked biscuits on diabetic rats. Design. The gross chemical composition, total carotenoids, phenolic and flavonoids of wheat flour and quinoa flour, and the rheological properties of the control, 12.5% quinoa, and 25% quinoa biscuit dough were determined. The effects of consumption of 12.5% quinoa and 25% quinoa biscuits on diabetic rats were investigated. Results. Quinoa flour had significantly higher levels of the gross chemical composition except for carbohydrate and increased phenolic compound and flavonoids content than those in wheat flour. Increasing the amount of quinoa flour in the biscuits could increase the farinograph and extensograph values of the dough. Biological results showed that the highest improvement in nutritional values appeared in the diabetic rat group, which consumed 25% quinoa biscuit for 60 days. The consumption of 12.5% quinoa biscuit and 25% quinoa biscuit showed a decline in blood glycosylated hemoglobin and glucose and an elevation in insulin levels compared with the positive control diabetic rat group. Discussion and Conclusion. It is encouraging to replace wheat flour with quinoa flour in biscuit manufacturing owing to positive effects on both the technological properties and sensory evaluation of biscuits. The increase of quinoa flour up to 25% had favorable nutritional values and hypoglycemic effects.

Gastric Electrical Stimulation Increases the Proliferation of Interstitial Cells of Cajal and Alters the Enteric Nervous System in Diabetic Rats

BackgroundLack of interstitial cells of Cajal (ICC) and neuropathy were the most possible pathological mechanisms of diabetic gastroparesis. Gastric electrical stimulation (GES) is a promising way to treat gastroparesis. This study aimed to explore the impact of GES on ICC together with enteric neurons in diabetic rats and the possible mechanisms involved. Materials and MethodsA total of 60 rats were randomized into six groups, including the normal control group, diabetic group (DM), diabetic with sham GES group (DM + SGES), and three groups of diabetic rats with GES (DM + GES1, DM + GES2, and DM + GES3). The proliferation of ICC and expressions of 5-hydroxytryptamine (serotonin) receptor 2B (5-HT2B), neuronal nitric oxide synthase (nNOS), choline acetyltransferase (CHAT), protein gene product 9.5, and glia cell line–derived neurotrophic factor (GDNF) in the antrum of the stomach were evaluated by immunofluorescence staining or Western blot. The levels of 5-HT in blood and tissue were determined by enzyme-linked immunosorbent assay. ResultsThe proliferation of ICC was significantly reduced in the DM group, together with the DM + SGES group, but increased in the three DM + GES groups. The expression of 5-HT2B was decreased in the DM group and enhanced in the DM + GES groups. Similarly, the levels of 5-HT in the blood and distal stomach tissue were increased in the DM + GES groups. Both nNOS labeled neurons and CHAT-positive neurons were reduced in the myenteric plexus of the DM group, whereas these neurons were dramatically increased the in DM + GES groups. The expression of GDNF protein in the diabetic rats was down-regulated, whereas GES increased the expression of GDNF. ConclusionsGES improves the proliferation of ICC possibly related with the 5-HT/5-HT2B signal pathway and alters the enteric nervous system partly though the GDNF expression.

Antidiabetic and Hepatoprotective Activity of a Novel Polyherbal preparation against Streptozotocin-Induced Diabetes Rats and its Formulation into a Tablet Dosage Form

Context: Diabetes is estimated to affect 79.4 million individuals in India by 2030. Aim: A polyherbal mixture containing hydroalcoholic extracts of Cinnamomum zeylanicum (CZ) bark, Eugenia jambolana (EJ) seed, Vinca rosea (VR) entire plant, and Gymnema sylvestre (GS) leaves was tested for anti-diabetic and hepatoprotective properties in different proportions. Materials and Methods: In normal and diabetic rats, the anti-diabetic and hepatoprotective efficacy was evaluated. Male and female Albino Wistar rats weighing 150–200 g were utilized in the experiment. Streptozotocin (60 mg/kg, i.p.) was used to induce diabetes. Group 1 acts as a normal control, Group 2 as a diabetic control, and Group 3 as a standard control, all animals of Group 3 were given Glibenclamide at a dose of 5 mg/kg p. o. Diabetic rats in groups 4–7 and 8–11 were given polyherbal preparations (PHPs) containing a combination of the above-mentioned plants in different proportions at doses of 200 and 400 mg/kg body weight, respectively, for dosage optimization and to determine the most efficacious and safe dose. The treatments were administered for a total of 28 days. Blood was drawn on the 7th, 14th, 21st, and 28th days to determine diabetic and hepatoprotective indicators such as body weight, blood glucose (BGL) levels, liver glycogen, total protein, urea, creatinine, serum glutamic oxaloacetic transaminase, and serum glutamic pyruvic transaminase. On the 28th day of the research, rats were sacrificed, and the pancreas examined for histological results. Results: BGL levels and serum liver enzymes were significantly reduced when a polyherbal mixture including CZ: EJ: VR: GS: 2: 1: 2: 2 at 400 mg/kg was administered. The optimum PHP ratio was then translated into tablet formulations (F1-F9) and tested for quality control characteristics. The weight, hardness, thickness, friability, and disintegration time of polyherbal tablets were all found to be within acceptable pharmacopeial parameters. Formulation F8, which included 20% sodium starch glycolate, had a disintegration time of 291 s. Formulation F8 was further tested for description, hardness, friability, and disintegration time during a 3-month accelerated stability testing. The results of a short-term stability investigation were likewise positive and comparable to the original formulation. Conclusion: As a result, the produced polyherbal formulation F8 may be utilized as a solid dosage form that is stable, patient-friendly, and cost-effective.

Modulatory Effect of Lawsonia inermis Linn. Leaves on Andrological Parameters and Histopathological Changes of Testes in Streptozocine Induced Diabetic Wistar Rats

Diabetes mellitus (DM) has been known to be a major health challenge that have harmful effects on the quality of life globally as a result of its numerous complications. One of the most prevalent secondary complication of the disease is male reproductive system dysfunction. Oral hypoglycaemic drugs are used for managing diabetes but their use has been reported to possess side effects on male reproductive organ leading to significant alteration of spermatogenesis. Lawsonia inermis Linn are used in the treatment of both infectious and non-infectious diseases like poliomyelitis, measles, menorrhagia, vaginal discharge and leucorrhoea. Lawsonia inermis leaves were sectioned using N-hexane, ethyl acetate and methanol. Fractions obtained were assessed for their modulatory effect. Thirteen groups of diabetic rats (n=5) were orally administered 25, 50 and 100 mg/kg of each of the three partitioned fraction, metformin (500 mg/kg), glibenclamide (5 mg/kg), while untreated hyperglycaemic and normoglycaemic rats received distilled water for 28 days. Sperm parameters showed significant (p&lt;0.05) decreased motility in most treatment group compared to normoglycaemic control but significant improvement was observed in sperm parameters when compared to untreated diabetic control. The sperm volume and live/dead ratio of diabetic treated rats showed little or no significant alteration in all the administered dosage compared to both diabetic and non-diabetic controls. Methanol fraction at 100mg/kg presented non-significant (p&gt;0.05) decreased total abnormal sperm cell compared to normoglycemic control. Diabetic and non-diabetic control had a greater number of spermatozoa with tailless head abnormality compared to Lawsonia inermis treatment groups. Histopathology result of diabetic untreated testes showed histological abnormality represented by degenerated seminiferous tubules when compared to normoglycemic control cases. Treatment groups with fractions of Lawsonia inermis presents normal histological appearance. We concluded that this study showed that Lawsonia inermis has significant modulatory or ameliorative effect on various sperm abnormalities and testicular degeneration seen in diabetic ones.

The effect of stevia sweetener on diabetic nephropathy in rats

Diabetic nephropathy (DN) is considered a clinical syndrome, which is a diabetic kidney disease characterized by increasing blood pressure, albuminuria, and chronic kidney disease. The current study aimed to determine the effect of sweetener (Stevia rebaudiana ) on diabetic nephropathy in a diabetic rat model. Four groups (n=7) of male albino rats (Rattus norvegicus): the control group, diabetic control group (induced streptozotocin intraperitoneally), two diabetic rat groups treated with 2 doses of stevia (200 and 400 mg/kg body weight) for 4 weeks. Biomarkers of nephropathy were measured in plasma and kidneys at the end of the experiment. The levels of plasma glucose, urea, uric acid, creatinine, renal malondialdehyde (MDA), and caspase-3 significantly increased in diabetic rats and levels of insulin, renal catalase, superoxide dismutase, and vascular endothelial growth factor A (VEGF-A) were significantly decreased. After treating the diabetic rats with natural sweetener (stevia), the kidney and plasma biochemical parameters were improved significantly. These results indicated the major role of stevia in diabetic nephropathy.