scholarly journals Heat Stress Prevents the Decrease in Succinate Dehydrogenase Activity in the Extensor Digitorum Longus of Streptozotocin-Induced Diabetic Rats

2018 ◽  
pp. 117-126 ◽  
Author(s):  
K. NONAKA ◽  
S. UNE ◽  
M. KOMATSU ◽  
R. YAMAJI ◽  
J. AKIYAMA
Keyword(s):  
Diabetes Mellitus ◽  
Heat Stress ◽  
Succinate Dehydrogenase ◽  
Extensor Digitorum Longus ◽  
Diabetic Rats ◽  
Extensor Digitorum ◽  
Heat Shock Protein 60 ◽  
Succinate Dehydrogenase Activity ◽  
Male Wistar Rats ◽  
Superoxide Dismutase 2

This study aimed to investigate whether heat stress (HS) prevents a decrease in succinate dehydrogenase (SDH) activity and heat shock protein 60 (HSP60) and superoxide dismutase 2 (SOD2) contents in the extensor digitorum longus of streptozotocin (STZ)-induced diabetic rats. Twelve-week-old male Wistar rats were assigned to one of the four groups (n=6/group): control (Con), HS, diabetes mellitus (DM), and diabetes mellitus and heat stress (DM+HS). Diabetes was induced by the administration of STZ (50 mg/kg). HS was initiated 7 days after STZ treatment and performed at 42 °C for 30 min 5 times a week for 3 weeks. SDH activity was decreased in the DM and DM+HS groups. However, SDH activity was greater in the DM+HS group than in the DM group. Although HSP60 content was lower in the DM group than in the Con group, it was maintained in the DM+HS groups and was higher than that in the DM group. SOD2 content was decreased only in the DM group. These findings suggest that HS prevents the decrease in SDH activity in the skeletal muscle induced by DM. According to this mechanism, the maintenance of SOD2 and HSP60 by HS may suppress the increase in oxidative stress.

Effects of endurance exercise-training on single-fiber contractile properties of insulin-treated streptozotocin-induced diabetic rats

2005 ◽  
Vol 99 (2) ◽  
pp. 472-478 ◽  
Author(s):  
Otto A. Sanchez ◽  
LeAnn M. Snow ◽  
Dawn A. Lowe ◽  
Robert C. Serfass ◽  
LaDora V. Thompson
Keyword(s):  
Exercise Training ◽  
Endurance Exercise ◽  
Extensor Digitorum Longus ◽  
Diabetic Rats ◽  
Contractile Properties ◽  
Extensor Digitorum ◽  
Single Fiber ◽  
Moderate Intensity ◽  
Specific Tension ◽  
Endurance Exercise Training

The purpose of this study was to characterize the contractile properties of individual skinned muscle fibers from insulin-treated streptozotocin-induced diabetic rats after an endurance exercise training program. We hypothesized that single-fiber contractile function would decrease in the diabetic sedentary rats and that endurance exercise would preserve the function. In the study, 28 rats were assigned to either a nondiabetic sedentary, a nondiabetic exercise, a diabetic sedentary, or a diabetic exercise group. Rats in the diabetic groups received subcutaneous intermediate-lasting insulin daily. The exercise-trained rats ran on a treadmill at a moderate intensity for 60 min, five times per week. After 12 wk, the extensor digitorum longus and soleus muscles were dissected. Single-fiber diameter, Ca2+-activated peak force, specific tension, activation threshold, and pCa50 as well as the myosin heavy chain isoform expression (MHC) were determined. We found that in MHC type II fibers from extensor digitorum longus muscle, diameters were significantly smaller from diabetic sedentary rats compared with nondiabetic sedentary rats ( P < 0.001). Among the nondiabetic rats, fiber diameters were smaller with exercise ( P = 0.038). The absolute force-generating capacity of single fibers was lower in muscles from diabetic rats. There was greater specific tension (force normalized to cross-sectional area) by fibers from the rats that followed an endurance exercise program compared with sedentary. From the results, we conclude that alterations in the properties of contractile proteins are not implicated in the decrease in strength associated with diabetes and that endurance-exercise training does not prevent or increase muscle weakness in diabetic rats.

scholarly journals The Protective Effect of Marigold Hydroalcoholic Extract in STZ-Induced Diabetic Rats: Evaluation of Cardiac and Pancreatic Biomarkers in the Serum

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Esmaeel Ebrahimi ◽  
Saeed Shirali ◽  
Rahman Talaei
Keyword(s):  
Diabetes Mellitus ◽  
Protective Effect ◽  
Antioxidant Property ◽  
Diabetic Control ◽  
Diabetic Rats ◽  
Control Group ◽  
Dependent Manner ◽  
Hydroalcoholic Extract ◽  
Diabetic Control Group ◽  
Male Wistar Rats

Diabetes mellitus is the most common endocrine disorder worldwide and it is usually along with complications such as retinopathy, neuropathy, nephropathy, and cardiovascular disease. The prevalence of diabetes is increasing and its treatment has created concerns in society. The use of herbal medicine can be helpful in the management of diabetes mellitus. The aim of this study was to investigate the protective effect of marigold hydroalcoholic extract under diabetes condition. A total of 36 male Wistar rats were randomly divided into four groups: normal control group, diabetic control group, and groups treated with 250 or 500 mg/kg hydroalcoholic extract of marigold flower during four weeks. At the end of the study, the rats were anesthetized with ketamine/xylazine, and sampling was performed through cardiac puncture. The results showed that treatment with marigold improved body weight. In addition, we determined that marigold normalized the level of CK-MB, total CK, amylase, and lipase in a dose-dependent manner. Probably these effects resulted from antioxidant property of marigold; thus we suggest that marigold flower can be useful for reduction of diabetes complication.

Type I diabetes suppresses intracellular calcium ion increase normally evoked by heat stress in rat skeletal muscle

2021 ◽  
Author(s):  
Ryo Ikegami ◽  
Hiroaki Eshima ◽  
Toshiaki Nakajima ◽  
Shigeru Toyoda ◽  
David C. Poole ◽  
...  
Keyword(s):  
Heat Stress ◽  
Protein Expression ◽  
Type I Diabetes ◽  
Diabetic Rats ◽  
Diabetic Patients ◽  
Type I ◽  
Male Wistar Rats ◽  
Intracellular Calcium Ion ◽  
And Function

Heat stress, via its effects on muscle intracellular Ca2+ concentrations ([Ca2+]i), has been invoked as a putative therapeutic countermeasure to Type 1 diabetes-induced muscle atrophy. Using in vivo muscle preparation we tested the hypothesis that impaired muscle Ca2+ homeostasis in type I diabetic rats is due to attenuated heat stress tolerance mediated via TRPV1. Male Wistar rats were assigned to 1 of 4 groups: 1.control 30oC (CONT 30oC), 2.CONT 40oC, 3.diabetes 30oC (DIA 30oC), 4.DIA 40oC. 40oC was selected because it just exceeds the TRPV1 activation threshold. Spinotrapezius muscles were exteriorized in vivo and loaded with the fluorescent Ca2+ probe Fura-2AM. [Ca2+]i was estimated over 20min using fluorescence microscopy in quiescent muscle held at the required temperature using calibrated heat source applied to the ventral muscle surface. Western blotting was performed to determine the protein expression levels of TRPV1 in spinotrapezius muscle. After 20min of heat stress, the CONT 40oC condition induced a 12.3% [Ca2+]i elevation that was absent from the DIA 40oC or other conditions. Thus, no significant differences were found among DIA 40oC, DIA 30oC and CONT 30oC. TRPV1 protein expression was decreased by 42.0% in DIA compared with CONT (P<0.05) and, unlike CONT, heat stress did not increase TRPV1 phosphorylation. In conclusion, diabetes suppresses TRPV1 protein expression and function and inhibits the elevated myocyte [Ca2+]i evoked normally by heat stress. These results suggest that capsaicin or other therapeutic strategies to increase Ca2+ accumulation via TRPV1 might be more effective than hyperthermic therapy for Type I diabetic patients.

scholarly journals Effect of Carcinogen 1,2-Dimethylhydrazine Treatment on Fiber Types in Skeletal Muscles of Male Wistar Rats

2017 ◽  
pp. 845-858
Author(s):  
V. SMERDU ◽  
M. PERŠE
Keyword(s):  
Animal Model ◽  
Wistar Rats ◽  
Extensor Digitorum Longus ◽  
Extensor Digitorum ◽  
Fiber Types ◽  
Variable Response ◽  
Hybrid Fiber ◽  
Control Male ◽  
Male Wistar Rats ◽  
Isoform Expression

The cancerogen 1,2-dimethylhydrazine (DMH), widely used in the experimental animal model of carcinogenesis, affects various organs, but its effect on muscle fibers is unknown. To evaluate the effect of 15-week DMH treatment on the fiber size and myosin heavy chain (MyHC) isoforms, which substantially determine fiber types and their contractile characteristics, pure and hybrid fiber types were immunohistochemically determined according to the MyHC isoform expression in soleus, extensor digitorum longus, gastrocnemius medialis and lateralis muscles of DMH-treated and control male Wistar rats. Whereas the size of fibers was mostly unaffected, the MyHC isoform expression was partially affected in both gastrocnemius samples, but not in the soleus and extensor digitorum longus of DMH-treated rats. The lower proportions of hybrid fiber types and especially that of type 1/2x in most gastrocnemius samples of DMH-treated rats resulted in a shift towards a single MyHC isoform expression, but the extent and pattern of the MyHC isoform shift varied across the different gastrocnemius samples. Such variable response to DMH treatment across muscles indicates that each muscle possesses its own adaptive range. These findings are essential for an accurate evaluation of skeletal muscle characteristics in DMH animal model.

scholarly journals Protective effects of phytomediated synthesized magnesium hydroxide nanomaterials using Monodora myristica against diabetes-associated hepatopathy, nephropathy and neuropathy in streptozotocin-exposed rat

2021 ◽  
Author(s):  
Olakunle Bamikole Afolabi ◽  
Omotade I Oloyede ◽  
Bukola T Aluko ◽  
Jonathan Johnson
Keyword(s):  
Diabetes Mellitus ◽  
Wistar Rats ◽  
Low Dose ◽  
Diabetic Rats ◽  
Enzymatic Antioxidants ◽  
Protective Effects ◽  
Control Groups ◽  
Male Wistar Rats ◽  
Monodora Myristica ◽  
Standard Techniques

Abstract There is recently a fast growing interest in green nanotechnology as a better approach for managing diabetes mellitus (DM) and its associated complications. This study therefore aimed at exploring the protective potentials of biogenic phytomediated magnesium-based nanoparticles using Monodora myristica seed (Mg(OH)2NP-Mm) against streptozotocin-induced diabetic hepatopathy, nephropathy and neuropathy in Wistar rats. Mg(OH)2NP-Mm was biosynthesized and characterized using standard techniques. Forty-eight (48) adult male Wistar rats weighing 150-200 g, were indiscriminately grouped into eight (8) groups of six (6) rats (n=6) each. Diabetes was induced with a low dose of streptozotocin (STZ) (55 mg/kg bw) and diabetic animals administered 50, 100, 150 and 200 mg/kg bw Mg(OH)2NP-Mm for 21 days, while control groups received glibenclamide (5 mg/kg bw) and Mg(OH)2-STD (150 mg/kg bw), respectively. In this study, treatment with Mg(OH)2NP-Mm caused a significant (p < 0.05) improvement in fasting blood sugar (FBG), serum hepatic biomarkers (AST, ALT and ALP activities), renal clearance markers (creatinine and urea), total protein (TP) and bilirubin. Enzymatic and non-enzymatic antioxidants, as well as histomorphological examinations indicated a significant (p < 0.05) restoration of the hepatic, renal and brain tissues. This finding therefore, hypothesizes attenuation of redox imbalance which probably could be the basis for the protective effect demonstrated by Mg(OH)2NP-Mm in the tissues examined from STZ-induced diabetic rats.

scholarly journals Morphological Changes of Gingiva in Streptozotocin Diabetic Rats

2009 ◽  
Vol 2009 ◽  
pp. 1-4 ◽  
Author(s):  
C. Tesseromatis ◽  
A. Kotsiou ◽  
H. Parara ◽  
E. Vairaktaris ◽  
M. Tsamouri
Keyword(s):  
Diabetes Mellitus ◽  
Morphological Changes ◽  
Diabetic Rats ◽  
Control Group ◽  
Diabetic Patients ◽  
Histological Investigation ◽  
Bacterial Diseases ◽  
Male Wistar Rats ◽  
Streptozotocin Induced Diabetes ◽  
Routine Assay

Gingivitis and periodontitis are chronic bacterial diseases of the underlying and surrounding tooth tissues. Diabetes mellitus is responsible for tooth deprivation both by decay and periodontal disease. The streptozotocin-induced diabetes results in a diabetic status in experimental animals similar to that observed in diabetes patients. The aim of the study was to investigate the relationship between the gingival lesions and the microangiopathy changes in streptozotocin-induced diabetes mellitus. Forty male Wistar rats were divided into two groups (control and experimental). Diabetes mellitus was induced by 45 mg/kg IV streptozotocin. The histological investigation of the marginal gingival and the relevant gingival papilla showed inflammation of the lamina propria and the squamous epithelium as well as marked thickness of the arteriole in the diabetic group, but no changes were observed in the control group. The results suggested a probable application of a routine gingival histological investigation in diabetic patients in order to control the progress of disease complications. It may be concluded that histological gingival investigation can be used as a routine assay for the control of the diabetic disease and prevention of its complications.

scholarly journals The effect of diabetes mellitus on rat skeletal extensor digitorum longus muscle tissue: An FTIR study

2007 ◽  
Vol 21 (3) ◽  
pp. 151-160 ◽  
Author(s):  
Ozlem Bozkurt ◽  
Mehmet Dincer Bilgin ◽  
Feride Severcan
Keyword(s):  
Diabetes Mellitus ◽  
Extensor Digitorum Longus ◽  
Structural Changes ◽  
Experimental Models ◽  
Extensor Digitorum ◽  
Nucleic Acid Content ◽  
Type I ◽  
Muscle Tissues ◽  
Chronic Disorder ◽  
Edl Muscle

Diabetes mellitus (DM) is a chronic disorder of carbohydrate, fat and protein metabolism, which is characterized by a defective insulin secretory response. Skeletal muscle takes role in determination of carbohydrate and lipid metabolism, therefore; it is one of the target tissues of diabetes. Herein this study, application of Fourier Transform Infrared (FTIR) spectroscopy in diabetic skeletal Extensor Digitorum Longus (EDL) muscle tissues will be presented which highlight the promise of this technique in medical research. Type I DM was induced in rats by injection of streptozotocin (STZ) which is one of the most popular experimental models. In diabetes, a significant increase was observed in lipid order together with an increase in hydration of phospholipid molecules in membrane structure. There was a decrease in lipid and nucleic acid content in diabetic EDL muscles. A dramatic increase in the bandwidth of amide II band (1540 cm−1) and shifting of the position of this band to lower frequency values in diabetes was observed indicating structural changes occurring in proteins of diabetic EDL muscles.

scholarly journals Leaf Extracts of Anchomanes difformis Ameliorated Kidney and Pancreatic Damage in Type 2 Diabetes

Plants ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 300
Author(s):  
Toyin Dorcas Alabi ◽  
Nicole L. Brooks ◽  
Oluwafemi O Oguntibeju
Keyword(s):  
Diabetes Mellitus ◽  
Type 2 Diabetes ◽  
Microvascular Complications ◽  
Diabetic Rats ◽  
Leaf Extracts ◽  
Pancreatic Damage ◽  
Body Weights ◽  
Male Wistar Rats ◽  
End Stage

Kidney disease in diabetes is one of the common microvascular complications of diabetes mellitus implicated in end-stage renal failure. This study explored the ability of Anchomanes difformis to ameliorate kidney and pancreatic damage in type 2 diabetes mellitus using male Wistar rats. Two weeks of fructose (10%) administration followed by streptozotocin (40 mg/kg) were used to induce type 2 diabetes. Leaf extract (aqueous) of Anchomanes difformis (200 mg and 400 mg/kgBW) was administered orally for six weeks. Body weights were monitored, urea and creatinine were measured. Interleukins (IL)-1β, IL-6, IL-10, IL-18, and TNFα were measured in the kidney lysate. CAT, SOD, ORAC, FRAP, and MDA levels were also evaluated in the kidney. Transcription factors (Nrf2 and NF-ĸB/p65) and apoptotic markers (Bcl2 and caspase 3) were investigated in the kidney. Histological sections of the pancreas and kidney tissues were examined for any visible pathology. Supplementation with Anchomanesdifformis enhanced antioxidant status, modulated inflammatory response, and reduced apoptosis in the kidney. It also restored the kidney and pancreatic histoarchitecture of the treated diabetic rats. The pathophysiology associated with diabetic nephropathy and pancreatic damage showcase the importance of exploring the use of antidiabetic, nephroprotective agents such as Anchomanes difformis to kidney damage in type 2 diabetes.

Sign in / Sign up

Export Citation Format

Share Document