scholarly journals Effects of L-glutamine supplementation on the myenteric neurons from the duodenum and cecum of diabetic rats

2011 ◽  
Vol 48 (1) ◽  
pp. 66-71 ◽  
Author(s):  
Jacqueline Nelisis Zanoni ◽  
Eleandro Aparecido Tronchini ◽  
Sheila Alves Moure ◽  
Ivan Domicio da Silva Souza
Keyword(s):  
Oxidative Stress ◽  
Diabetes Mellitus ◽  
Neuroprotective Effect ◽  
Natural Aging ◽  
Neurological Complications ◽  
Diabetic Rats ◽  
Glutamine Supplementation ◽  
Complications Of Diabetes ◽  
Myenteric Neurons ◽  
Cellular Antioxidants

CONTEXT: Peripheral neuropathy is one of the chronic complications of diabetes mellitus and is directly related to gastrointestinal consequences of the disease. Myenteric neurons are affected in some pathological conditions such as diabetic neuropathy. The imbalance between cellular antioxidants and free radicals, leading to an increase in oxidative stress, is considered one of the main factors responsible for neuronal damages in diabetes. Drugs that reduce the oxidative stress may play a significant role in the treatment of neurological complications of diabetes mellitus. OBJECTIVE: To evaluate the effect of L-glutamine supplementation on the myenteric neurons from the cecum and duodenum of Wistar rats with streptozotocin-induced diabetes mellitus. METHODS: The animals were divided in four groups (n = 5): non-treated normoglycemics, normoglycemics treated with L-glutamine, non-treated diabetics and diabetics treated with L-glutamine from the 4th day of diabetes induction on. The amino acid L-glutamine was added to their diet at 1%. Giemsa's technique was employed to stain the myenteric neurons. We determined the cell body area of 500 neurons in each group studied. The quantitative analysis was performed by sampling in an area of 16.6 mm² in the cecum and 3.6 mm² in the duodenum of each animal. RESULTS: After the supplementation with L-glutamine in the duodenum, we observed a preservation of neuronal density in groups normoglycemic and diabetic (P<0.05). We also observed a preservation of the cell bodies area in diabetic animals (group treated with L-glutamine) (P<0.05). In the cecum, that preservation was not evident. CONCLUSION: Supplementation with L-glutamine (1%) promoted a neuroprotective effect on the myenteric neurons from the duodenum of rats, both in terms of natural aging and of diabetes mellitus.

scholarly journals The Antioxidant Effect of Curcumin and Rutin on Oxidative Stress Biomarkers in Experimentally Induced Periodontitis in Hyperglycemic Wistar Rats

Molecules ◽  
2021 ◽  
Vol 26 (5) ◽  
pp. 1332
Author(s):  
Gilda M. Iova ◽  
Horia Calniceanu ◽  
Adelina Popa ◽  
Camelia A. Szuhanek ◽  
Olivia Marcu ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Diabetes Mellitus ◽  
Diabetic Rats ◽  
Gingival Tissue ◽  
Control Group ◽  
Albino Rats ◽  
Oxidative Stress Biomarkers ◽  
Significant Difference ◽  
The Impact ◽  
Experimentally Induced

Background: There is a growing interest in the correlation between antioxidants and periodontal disease. In this study, we aimed to investigate the effect of oxidative stress and the impact of two antioxidants, curcumin and rutin, respectively, in the etiopathology of experimentally induced periodontitis in diabetic rats. Methods: Fifty Wistar albino rats were randomly divided into five groups and were induced with diabetes mellitus and periodontitis: (1) (CONTROL)—control group, (2) (DPP)—experimentally induced diabetes mellitus and periodontitis, (3) (DPC)—experimentally induced diabetes mellitus and periodontitis treated with curcumin (C), (4) (DPR)—experimentally induced diabetes mellitus and periodontitis treated with rutin (R) and (5) (DPCR)—experimentally induced diabetes mellitus and periodontitis treated with C and R. We evaluated malondialdehyde (MDA) as a biomarker of oxidative stress and reduced glutathione (GSH), oxidized glutathione (GSSG), GSH/GSSG and catalase (CAT) as biomarkers of the antioxidant capacity in blood harvested from the animals we tested. The MDA levels and CAT activities were also evaluated in the gingival tissue. Results: The control group effect was statistically significantly different from any other groups, regardless of whether or not the treatment was applied. There was also a significant difference between the untreated group and the three treatment groups for variables MDA, GSH, GSSG, GSH/GSSG and CAT. There was no significant difference in the mean effect for the MDA, GSH, GSSG, GSH/GSSG and CAT variables in the treated groups of rats with curcumin, rutin and the combination of curcumin and rutin. Conclusions: The oral administration of curcumin and rutin, single or combined, could reduce the oxidative stress and enhance the antioxidant status in hyperglycemic periodontitis rats.

scholarly journals Effect of the ascorbic acid treatment on the NADHd-positive myenteric neurons of diabetic rats proximal colon

2007 ◽  
Vol 50 (1) ◽  
pp. 31-38 ◽  
Author(s):  
Jacqueline Nelisis Zanoni ◽  
Renata Virginia Fernandes Pereira ◽  
Priscila de Freitas
Keyword(s):  
Ascorbic Acid ◽  
Acid Treatment ◽  
Neuroprotective Effect ◽  
Proximal Colon ◽  
Diabetic Rats ◽  
Daily Treatment ◽  
Body Area ◽  
Neuronal Density ◽  
Myenteric Neurons ◽  
Intestinal Segments

The aim of this work was to study the effect of the ascorbic acid on the myenteric neurons of diabetic rats proximal colon. Fifteen rats (90 days old) were divided into three groups: control, untreated diabetic and treated diabetic with ascorbic acid (DA). After 120 days of daily treatment with ascorbic acid, the intestinal segments were submitted to the NADH-diaphorase (NADHd) histochemistry technique to expose the myenteric neurons. The group DA showed a higher neuronal density (33.4 %) when compared to the untreated diabetic animals (p < 0.05). Cellular body area of neurons was significantly larger in group DA (17.3 %) when compared to the untreated diabetics (p < 0.05). It could be concluded that the ascorbic acid promoted a neuroprotective effect on the NADHd myenteric neurons of the proximal colon of diabetic rats.

scholarly journals IMPROVEMENT IN OXIDATIVE STRESS AFTER DUODENOJEJUNOSTOMY IN AN EXPERIMENTAL MODEL OF TYPE 2 DIABETES MELLITUS

2016 ◽  
Vol 29 (suppl 1) ◽  
pp. 3-7 ◽  
Author(s):  
Cacio Ricardo WIETZYCOSKI ◽  
João Caetano Dallegrave MARCHESINI ◽  
Sultan AL-THEMYAT ◽  
Fabiola Shons MEYER ◽  
Manoel Roberto Maciel TRINDADE
Keyword(s):  
Oxidative Stress ◽  
Diabetes Mellitus ◽  
Type 2 Diabetes ◽  
Type 2 Diabetes Mellitus ◽  
Diabetic Rats ◽  
Diabetic Group ◽  
Control Group ◽  
Oral Glucose ◽  
Surgical Group

ABSTRACT Background: Type 2 Diabetes Mellitus is a multifactorial syndrome with severe complications. Oxidative stress is accepted as a causal factor of chronic complications Aim: To demonstrate alterations in oxidative stress after metabolic surgery. Methods: Twenty-four 2-day-old Wistar rats were used. In 16, Type 2 Diabetes Mellitus was induced by 100 mg/kg streptozotocin injection. The development of diabetes was confirmed after 10 weeks using an oral glucose tolerance test. Eight diabetic rats composed the diabetic surgical group; the remaining eight composed the diabetic group. Eight animals in which diabetes was not induced formed the clinical control group. The Marchesini technique was used in the diabetic surgical group. After 90 days, the rats were sacrificed, and the oxidative stress markers were measured. Results: Thiobarbituric acid reactive substances, superoxide dismutase and catalase were significantly reduced in the diabetic surgical group compared to the diabetic group. Conclusion: The duodenojejunostomy was effective in controlling the exacerbated oxidative stress present in diabetic rats.

scholarly journals Oxidative Stress as the Main Target in Diabetic Retinopathy Pathophysiology

2019 ◽  
Vol 2019 ◽  
pp. 1-21 ◽  
Author(s):  
Olvera-Montaño Cecilia ◽  
Castellanos-González José Alberto ◽  
Navarro-Partida José ◽  
Cardona-Muñoz Ernesto Germán ◽  
López-Contreras Ana Karen ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Diabetes Mellitus ◽  
Diabetic Retinopathy ◽  
Vision Impairment ◽  
Complications Of Diabetes ◽  
Cellular Degeneration ◽  
Neural Damage ◽  
Main Target ◽  
Focus Point

Diabetic retinopathy (DR) is one of the most common complications of diabetes mellitus (DM) causing vision impairment even at young ages. There are numerous mechanisms involved in its development such as inflammation and cellular degeneration leading to endothelial and neural damage. These mechanisms are interlinked thus worsening the diabetic retinopathy outcome. In this review, we propose oxidative stress as the focus point of this complication onset.

scholarly journals Comparative Study of the Antioxidant Effects of Metformin, Glibenclamide, and Repaglinide in Alloxan-Induced Diabetic Rats

2016 ◽  
Vol 2016 ◽  
pp. 1-5 ◽  
Author(s):  
Bonaventure Chukwunonso Obi ◽  
Theophine Chinwuba Okoye ◽  
Victor Eshu Okpashi ◽  
Christiana Nonye Igwe ◽  
Edwin Olisah Alumanah
Keyword(s):  
Oxidative Stress ◽  
Diabetes Mellitus ◽  
Diabetic Complications ◽  
Significant Proportion ◽  
Diabetic Control ◽  
Diabetic Rats ◽  
Control Group ◽  
Diabetic Control Group ◽  
Antioxidant Effects ◽  
And Oxidative Stress

Diabetes mellitus is one of the serious global health problems affecting a significant proportion of both developed and developing countries. Overproduction of free radicals and oxidative stress has been associated with the development of diabetic complications. In the present study, the antioxidant effects of metformin (MET), glibenclamide (GLI), and repaglinide (REP) were evaluated in alloxan-induced diabetic rats. The findings from this study may possibly help in understanding the efficacy of these standard drugs in managing the complications arising from diabetes mellitus (DM). Alloxan (130 mg/kg BW) was administered as a single dose to induce diabetes. Four (4) groups of rats (n=6) were used; group 1 served as diabetic control while groups 2, 3, and 4 were the diabetic test groups that received MET (25 mg/kg), GLI (2.5 mg/kg), and REP (0.5 mg/kg), respectively. The result of the study showed significant (p<0.05) improvement in the altered antioxidant enzymes (SOD, CAT) and GSH concentration in diabetic treated rats compared with the diabetic control group. MET and REP produced significant effect on the MDA concentration while GLI showed insignificant reduction in the MDA concentration compared with the diabetic control. Findings from this study suggest that the administration of MET, GLI, and REP exerts significant antioxidant effects in alloxan-induced diabetic rats, thus contributing to the protective effect against oxidative stress-induced damage during diabetic complications.

Functional food supplements to ameliorate the secondary complications in high fructose fed diabetic rats

2017 ◽  
Vol 8 (5) ◽  
pp. 1840-1850 ◽  
Author(s):  
S. S. Gite ◽  
S. A. Yadav ◽  
S. S. Nilegaonkar ◽  
V. V. Agte
Keyword(s):  
Oxidative Stress ◽  
Lipid Profile ◽  
Kidney Function ◽  
Functional Food ◽  
Diabetic Rats ◽  
Food Supplements ◽  
Effective Management ◽  
Secondary Complications ◽  
Complications Of Diabetes ◽  
High Fructose

Poly-herbal functional food supplements inhibited high fructose induced glycation in diabetic rats and showed promise for effective management of secondary complications of diabetes such as improved lipid profile, kidney function and reduction of oxidative stress.

Effect of hydroalcoholic Allium ampeloprasum extract on oxidative stress, diabetes mellitus and dyslipidemia in alloxan-induced diabetic rats

2017 ◽  
Vol 86 ◽  
pp. 363-367 ◽  
Author(s):  
Mohammad Rahimi-Madiseh ◽  
Esfandiar Heidarian ◽  
Soleiman Kheiri ◽  
Mahmoud Rafieian-Kopaei
Keyword(s):  
Oxidative Stress ◽  
Diabetes Mellitus ◽  
Diabetic Rats ◽  
Allium Ampeloprasum

scholarly journals Beneficial effects of walnut (Juglans regia L.) oil-derived polyunsaturated fatty acid prevents a prooxidant status and hyperlipidemia in pregnant rats with diabetes

2020 ◽  
Author(s):  
Bingmei Sun ◽  
Hua Yan ◽  
Chao Li ◽  
Linlin Yin ◽  
Fei Li ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Diabetes Mellitus ◽  
Fatty Acid ◽  
Gestational Diabetes ◽  
Gestational Diabetes Mellitus ◽  
Juglans Regia ◽  
Diabetic Rats ◽  
Pregnant Rats ◽  
Beneficial Effects ◽  
Pregnant Diabetic

Abstract Background: Gestational diabetes mellitus has a long-term effect on pregnant women. Walnut (Juglans regia L.) oil-derived polyunsaturated fatty acid (PUFA) possesses multifarious pharmacological activities. This study investigated the beneficial effects of walnut oil-derived PUFA on glucose metabolism, pregnancy outcomes, oxidative stress, and lipid metabolism in gestational diabetes mellitus.Methods: The GDM rat model was generated by intraperitoneal injection of streptozotocin (40 mg/kg) on gestational day (GD) 6, GD7 and GD8. The differences between groups were estimated using one-way ANOVA followed by the Tukey’s multiple comparison test for post-hoc analysis.Results: The results indicated that PUFA could mitigate GDM in pregnant diabetic rats, as embodied by the decrease of fasting blood glucose and the increase of plasma insulin and hepatic glycogen levels. Also, PUFA could suppress oxidative stress in pregnant diabetic rats, as reflected by the decrease of malondialdehyde (MDA) content, an increase of superoxide dismutase (SOD), catalase (CAT) and gutathione peroxidase (GSH-Px) activities. PUFA could also mitigate the abnormal changes of lipid profiles in plasma and hepatic tissue. Moreover, the relative mRNA expression of sterol regulatory element-binding transcription factor-1 (SREBP-1), stearoyl-CoA desaturase-1 (SCD-1), fatty acid synthase (FAS), and acetyl-coenzyme A carboxylase (ACC), was suppressed by PUFA in pregnant diabetic rats.Conclusions: These results suggested that PUFA supplementation during pregnancy is beneficial in preventing diabetic complications in pregnant rats.

scholarly journals Curcumin and Its Analog Alleviate Diabetes-induced Damages by Regulating Inflammation and Oxidative Stress in Brain of Diabetic Rats​

2020 ◽  
Author(s):  
Chengfeng Miao ◽  
Hanbin Chen ◽  
Yulian Li ◽  
Ying Guo ◽  
Feifei Xu ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Diabetes Mellitus ◽  
Western Blot ◽  
Diabetic Rats ◽  
High Dose ◽  
Diabetic Encephalopathy ◽  
Sprague Dawley ◽  
The Brain ◽  
And Oxidative Stress ◽  
Myelin Staining

Abstract Background: Diabetic encephalopathy is a severe diabetes complication with cognitive dysfunction and neuropsychiatric disability. The mechanisms underlying diabetic encephalopathy is believed to be relevant with oxidative stress, vascular amylin deposition, immune receptors, inflammation, etc. This study wanted to evaluate the ability of curcumin and its analog A13 to alleviate oxidative stress and inflammation in diabetes-induced damages in brain.Methods: Sixty adult male Sprague-Dawley rats were divided into 5 groups: normal control (NC) group, diabetes mellitus (DM) group, curcumin-treated diabetes mellitus (CUR) group, high dose of A13-treated diabetes mellitus (HA) group, low dose of A13-treated diabetes mellitus (LA) group. Activation of the nuclear factor kappa-B (NF-κB p65) pathway was detected by RT-qPCR, immunohistochemical (IHC) staining and Western blot; oxidative stress was detected by biochemical detection kit; brain tissue sections were stained with hematoxylin–eosin (HE) staining and Myelin staining. Results: RT-qPCR, IHC staining and Western blot showed that curcumin and A13 treatment could inhibit the NF-κB p65 pathway. Curcumin and A13 increased the activity of superoxide dismutase and decreased the malondialdehyde level in the brain of diabetic rats. Furthermore, HE staining and Myelin staining demonstrated that the histological lesions of the brain in diabetic rats could be significantly ameliorated by curcumin and A13.Conclusion: Curcumin analog A13 could alleviate the damages in the brain of diabetes rats by regulating the pathways of inflammation and oxidative stress. A13 may be a new potential therapeutic agent for diabetic encephalopathy.

scholarly journals Supplementation with 0.1% and 2% vitamin e in diabetic rats: analysis of myenteric neurons immunostained for myosin-V and nNOS in the jejunum

2012 ◽  
Vol 49 (4) ◽  
pp. 284-290 ◽  
Author(s):  
Eleandro Aparecido Tronchini ◽  
Aline Rosa Trevizan ◽  
Cristiano Massao Tashima ◽  
Renata Virginia Ferreira Pereira ◽  
Jacqueline Nelisis Zanoni
Keyword(s):  
Diabetes Mellitus ◽  
Nervous System ◽  
Vitamin E ◽  
Enteric Nervous System ◽  
Neurological Complications ◽  
Diabetic Rats ◽  
Diabetic Group ◽  
Diabetic Patients ◽  
Myosin V ◽  
Gastric Stasis

CONTEXT: Diabetes mellitus is a disease characterized by hyperglycemia that, when allowed to progress long-term untreated, develops vascular and neurological complications, which are responsible for the development of alterations in the enteric nervous system in diabetic patients. In the gastrointestinal tract, diabetes mellitus promotes motor and sensory changes, and in the reflex function of this system, causing gastroparesis, diarrhea, constipation, megacolon, slow gastrointestinal transit, gastric stasis and dilation with decreased or increased peristaltic contractions. Several studies have shown that oxidative stress is the main responsible for the vascular and neurological complications affecting the enteric nervous system of diabetics. OBJECTIVE: The effects of 0.1% and 2% vitamin E on myosin-V- and nNOS-immunoreactive neurons in the jejunum of diabetic rats were investigated. METHODS: Thirty rats were divided into the groups: normoglycemic, normoglycemic treated with 0.1% vitamin E, normoglycemic treated with 2% vitamin E, diabetic, diabetic treated with 0.1% vitamin E, and diabetic treated with 2% vitamin E. The neuronal density and areas of neuron cell bodies were determined. RESULTS: Diabetes (diabetic group) significantly reduced the number of myosin-V-immunoreactive neurons compared with the normoglycemic group. The diabetic treated with 0.1% vitamin E and diabetic treated with 2% vitamin E groups did not exhibit a greater density than the D group (P>0.05). Nitrergic density did not change with diabetes (P>0.05). The areas of myosin-V- and nNOS-immunoreactive neurons significantly increased in the normoglycemic treated with 2% vitamin E and diabetic groups compared with the normoglycemic group. CONCLUSION: Supplementation with 2% vitamin E had a neurotrophic effect only in the area of myosin-V-immunoreactive neurons compared with the diabetic group.

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