scholarly journals Attenuation of Apoptosis and Oxidative Stress by Endurance Training in the Cerebellum of Diabetic Rats

2021 ◽  
Vol In Press (In Press) ◽  
Author(s):  
Asma Taheri ◽  
Abdolhamid Habibi ◽  
Saeid Shakerian ◽  
Mohammad Reza Tabandeh ◽  
Masoud Nikbakht
Keyword(s):  
Oxidative Stress ◽  
Endurance Training ◽  
Exercise Group ◽  
Diabetic Rats ◽  
Moderate Intensity ◽  
Control Group ◽  
Diabetic Patients ◽  
The Brain ◽  
And Oxidative Stress ◽  
Training Protocol

Objectives: Identifying the effective exercise protocol that attenuates the functional and molecular disturbances in different regions of the brain, in particular the cerebellum, can help the proper management of neuropathies in diabetic patients. Methods: Twenty rats were randomly divided into four groups: (1) Normal control group (CON), (2) normal exercise group (TH), (3) diabetes control group (DC), and (4) diabetes exercise group (TD). Diabetes was induced by i.p injection of a single dose of streptozotocin (50 mg/kg). The endurance training protocol was performed on a treadmill for five days a week for six weeks with moderate intensity. The activities of antioxidant enzymes and the expression or release of apoptotic factors were analyzed based on data from rat cerebellum tissue at the end of the experiments. Results: Six weeks of endurance training improved the oxidative defense system by increasing the activities of SOD (from 3.70 ± 0.64 to 6.55 ± 0.56), GPx (from 3.42 ± 0.73 to 4.84 ± 0.62), and catalase (from 1.36 ± 0.23 to 3.59 ± 0.37) and reducing the MDA concentration (from 6.81 ± 1.34 to 4.33 ± 1.03) in the cerebellum of diabetic rats. Increased expression or cytosolic release of apoptotic effectors such as bax, caspase 3, and cytochrome c in the cerebellum of diabetic rats were attenuated following exercise training. Conclusions: Our research results showed that six weeks of endurance training may be helpful for the attenuation of neuropathies in diabetic patients by the attenuation of apoptosis and oxidative stress in the cerebellum.

The effects of crocin (active contstituent of saffron) treatment on brain antioxidant enzyme mRNA levels in diabetic rats / Diyabetik ratlarda safranın aktif içeriği olan krosin tedavisinin beyindeki antioksidan enzimlerin mRNA seviyeleri üzerine etkisi

2016 ◽  
Vol 41 (2) ◽  
Author(s):  
Eyüp Altınöz ◽  
Cemal Ekici ◽  
Berna Özyazgan ◽  
Yılmaz Çiğremiş
Keyword(s):  
Oxidative Stress ◽  
Antioxidant Enzymes ◽  
Mrna Expression ◽  
Antioxidant Enzyme ◽  
Diabetic Rats ◽  
Control Group ◽  
Mrna Levels ◽  
The Brain ◽  
And Oxidative Stress

AbstractObjective: The aim of the present study is to evaluate the effect of crocin on mRNA expression of antioxidant enzymes, SOD, CAT and GPX in the brain of the STZ induced diabetic rats.Methods: Thirty animals randomized in three groups containing ten animals in each group as follows; control (non-diabetic rats), DM (STZ-induced untreated diabetic rats), DM+crocin (STZ-induced diabetic rats treated with crocin,). Crocin was given at a dose of 20 mg/kg bw/day by gavage for 21 days.Results: STZ injection caused a significant increase in mRNA expression of antioxidant enzymes, SOD, CAT and GPX when compared to control group. Crocin given to diabetic rats significantly decreased mRNA expression of antioxidant enzymes, SOD, CAT and GPX when compared to DM group.Conclusion: The present study demonstrates that crocin can modulate mRNA expression of antioxidant enzymes, SOD, CAT and GPX and oxidative stress in the brain of the STZ induced diabetic rats.

scholarly journals The Effect of Herniarin on Spatial Working Memory, Pain Threshold, and Oxidative Stress in Ischemic Hypoperfusion Model in Rats

2021 ◽  
Vol 7 (1) ◽  
pp. 42-50
Author(s):  
Zahra Nazari Barchestani ◽  
◽  
Maryam Rafieirad ◽  
Keyword(s):  
Oxidative Stress ◽  
Pain Threshold ◽  
Male Rats ◽  
Control Group ◽  
Tail Flick ◽  
Pain Thresholds ◽  
Ischemic Group ◽  
Significant Difference ◽  
The Brain ◽  
And Oxidative Stress

Background: Ischemia causes severe neuronal damage and induces oxidative stress, memory impairment, and reduces pain threshold. Herniarin is a powerful antioxidant. Objectives: This study aimed to evaluate the effect of herniarin on memory, pain, and oxidative stress in an ischemia model in male rats. Materials & Methods: In this study, 50 male rats were divided into 5 groups of control, sham, ischemic, and two other ischemic groups, which received herniarin at doses of 150 and 300 mg/kg by gavage for 14 days. Behavioral tests were performed by shuttle box, and Y-maze and pain tests were performed by Tail-Flick test. Then, the rats’ brains were extracted to evaluate lipid peroxidation and measure the levels of thiol and Glutathione Peroxidase (GPX) in the hippocampus and striatum tissues. The results were expressed as Mean±SEM and then analyzed using suitable statistical methods of ANOVA and least significant difference post-hoc test in SPSS V. 20. Results: Herniarin significantly increased the avoidance memory, spatial memory, and pain thresholds of ischemic rats at different concentrations (P<0.001). Besides, the amount of malondialdehyde (MDA) and thiol in the ischemic group increased significantly in comparison to the control group (P<0.001). Also, in the ischemic group, GPX (P<0.001) significantly decreased. Decreased MDA (P<0.001) and thiol (P<0.001) and increased GPX levels were observed with herniarin administration (P<0.01). Conclusion: According to this study’s results, herniarin can remove free radicals and oxidant substances from the brain. Thus, it improves memory and pain thresholds in the brain hypoperfusion ischemia model.

The Effect of Curcumin Nano-Suspension on Myocardial Fibrosis in Diabetic Rats

2020 ◽  
Vol 12 (10) ◽  
pp. 1215-1220
Author(s):  
Bingshuang Xue ◽  
Yi Xue ◽  
Jiaojiao Zhou ◽  
Qichao Yang
Keyword(s):  
Oxidative Stress ◽  
Myocardial Fibrosis ◽  
Hot Spot ◽  
Health And Safety ◽  
Diabetic Rats ◽  
Diabetic Patients ◽  
Therapeutic Drugs ◽  
Tnf Α ◽  
Mda Content ◽  
And Oxidative Stress

The occurrence of complications of diabetic patients not only increases the difficulty and burden of treatment but also significantly affects the health and safety of patients. Traditional therapeutic drugs are prone to drug resistance, which affects the therapeutic effect. In recent years, the application of plant-derived natural compounds in the treatment of diseases has become a hot spot in the research of diabetes drugs. Curcumin has anti-tumor, anti-inflammation, anti-oxidation and antimicrobial effects, but the mechanism of its effect on cardiomyocytes in diabetic patients is not yet clear. In this study, curcumin was prepared into nano-preparations and its mechanism of action in the process of myocardial fibrosis in diabetic rats was further explored. We found that injection of curcumin nano-suspension can increase the LVIDd and LVFS of rats, while reducing the serum CKMB, LDH, AST and cTnI levels. Further exploration found that curcumin can reduce serum TNF- α and IL-1 β levels in diabetic rats, while increasing the SOD and GSH-Px activities of myocardial tissue, and reducing MDA content. These suggests that curcumin can reduce inflammation and oxidative stress in diabetic rats. Therefore, this study believes that curcumin nano-suspension can effectively inhibit diabetic cardiomyocyte fibrosis, oxidative stress, and inflammation and protect the rat myocardium.

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.

Effect of progesterone on phosphamidon-induced impairment of memory and oxidative stress in rats

2011 ◽  
Vol 30 (10) ◽  
pp. 1626-1634 ◽  
Author(s):  
Amit K Sharma ◽  
Swapan K Bhattacharya ◽  
Naresh Khanna ◽  
Ashok K Tripathi ◽  
Tarun Arora ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Cognitive Function ◽  
Organophosphorus Pesticides ◽  
Thiobarbituric Acid ◽  
Treated Group ◽  
Control Group ◽  
Protein Thiols ◽  
Acute And Chronic Exposure ◽  
The Brain ◽  
And Oxidative Stress

Progesterone (a neurosteroid) is an important modulator of the nervous system functioning. Organophosphorus pesticides like phosphamidon have been shown to adversely affect memory and induce oxidative stress on both acute and chronic exposure. The present study was therefore designed to investigate the effects of progesterone (PROG) on phosphamidon-induced modulation of cognitive function and oxidative stress in rats. Cognitive function was assessed using step-down latency (SDL) on a passive avoidance apparatus and transfer latency (TL) on an elevated plus maze. Oxidative stress was assessed by examining the levels of thiobarbituric acid reactive species (TBARS) and non-protein thiols (NP-SH) in isolated homogenized whole brain samples. The results showed a significant reduction in SDL and prolongation of TL in the phosphamidon (1.74 mg/kg/d; p.o.) treated group at weeks 6 and 8 as compared to the control group. Two weeks treatment with PROG (15 mg/kg/d; i.p.) antagonized the effect of phosphamidon on SDL as well as TL. Phosphamidon alone produced a significant increase in the brain TBARS levels and decrease in the brain NP-SH levels. Treatment with PROG (15 mg/kg/d; i.p.) attenuated the effect of phosphamidon on oxidative stress. Together, the results showed that progesterone attenuated the cognitive dysfunction and increased oxidative stress induced by phosphamidon in the brain.

scholarly journals Aerobic exercise training reduces blood pressure, angiotensin II and oxidative stress of patients with resistant hypertension: the EnRiCH trial

2021 ◽  
Vol 42 (Supplement_1) ◽  
Author(s):  
S Lopes ◽  
J Mesquita-Bastos ◽  
M Teixeira ◽  
D Figueiredo ◽  
J Oliveira ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Angiotensin Ii ◽  
Exercise Training ◽  
Aerobic Exercise ◽  
Resistant Hypertension ◽  
Exercise Group ◽  
Aerobic Exercise Training ◽  
Control Group ◽  
Exercise Training Program ◽  
And Oxidative Stress

Abstract Introduction Resistant hypertension is a major challenge of modern cardiovascular medicine, as it is a puzzling problem without a clear solution. Exercise training clearly reduces blood pressure (BP) and oxidative stress in patients with hypertension, however evidence is limited regarding resistant hypertension. Purpose To determine the effect of an aerobic exercise training program in BP, angiotensin II and oxidative stress in patients with resistant hypertension. Methods EnRicH is a prospective, two-center, single-blinded, randomized controlled trial with a parallel two-arm group. Sixty patients with resistant hypertension were randomly assigned in a 1:1 ratio to undergo a 12-week aerobic exercise training program (exercise) or usual care (control). The powered primary efficacy measure was 24-hour ambulatory systolic BP change from baseline. Secondary outcome measures included daytime and nighttime ambulatory BP, office BP, cardiorespiratory fitness, and oxidative stress and inflammatory biomarkers: Interferon-gamma (IFN-y), Angiotensin II, vascular endothelial growth factor (VEGF), and superoxide dismutase (SOD). Results Fifty-three patients (exercise n=26, control n=27) completed the study. Patients were mainly women (54.7%), with an office BP of 140.7±15.9/84.2±9.4 mm Hg and taking an average of 4.6 antihypertensive medications (median, 5; range, 3 to 7). At baseline, no differences were found between groups for the study outcomes and patient characteristics. Ambulatory systolic BP was reduced −7.1 mm Hg (95% CI, −12.8 to −1.4; P=0.015) in the exercise group (127.4±12.2 to 121.2±12.2, p=0.007) compared to control group (126.1±17.2 to 126.9±15.2, p=514) over 24-hour. In addition, 24-hour ambulatory diastolic BP (−5.1 mm Hg, −7.9 to −2.3, P=0.001), daytime ambulatory systolic (−8.4 mm Hg, −14.3 to −2.5, P=0.006), and diastolic BP (−5.7 mm Hg, −9.0 to −2.4, P=0.001) were also reduced in the exercise group compared to the control group. There were no differences in the change of nighttime ambulatory BP between groups. Cardiorespiratory fitness improved in the exercise group by 14% (4.7 ml.kg-1.min-1, P&lt;0.001), while it remained unchanged in the control group (−0.37 ml.kg-1.min-1, P=0.442). A significant between-group difference in favor of exercise group was found for IFN-y (−4.3 pg/mL, 95% CI: −7.1 to −1.5; P=0.003), Angiotensin II (−157.0 pg/mL, 95% CI: −288.1 to −25.9; P=0.020), VEGF (10.53 pg/mL, 95% CI: 0.60 to 22.54; P=0.035), and SOD (0.35 pg/mL, 95% CI: 0.10 to 0.58; P=0.009). Conclusions A 12-week moderate intensity aerobic exercise program reduced ambulatory BP, angiotensin II and oxidative stress in patients with resistant hypertension. The antihypertensive effects of exercise in patients with resistant hypertension may be mediated by positive changes in oxidative stress and inflammatory biomarkers. FUNDunding Acknowledgement Type of funding sources: Foundation. Main funding source(s): European Union through European Regional Development Fund – Operational Competitiveness Factors Program (COMPETE)Portuguese Government through FCT - Foundation for Science and Technology

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 Effect of 2-weeks Coenzyme Q10 Supplementation on Malondialdehyde and Catalase Serum Levels Following Moderate and Severe Acute Resistance Training in Inactive Female Students

2019 ◽  
Vol 25 (4) ◽  
pp. 256-269
Author(s):  
Yeganeh Feizi ◽  
◽  
Mohammad Esmaeil Afzalpur ◽  
Seyed-Hosein Abtahi-Eivary ◽  
◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Resistance Training ◽  
Coenzyme Q10 ◽  
Serum Levels ◽  
Female Students ◽  
Moderate Intensity ◽  
Control Group ◽  
Short Term ◽  
Coenzyme Q10 Supplementation ◽  
And Oxidative Stress

Aims Physical activity is usually accompanied by free radicals’ production and oxidative stress. Moreover, to prevent adverse effects, coaches and athletes have to use proper supplementation. Therefore, the present study aimed to investigate the effect of short-term coenzyme Q10 supplementation on malondialdehyde and serum catalase enzyme activity following moderate and severe acute resistance training in inactive female students. Methods & Materials In total, 27 female students were randomly divided into three groups; the groups were homogeneous and equal (two groups of resistance training and one control group). The experimental groups were subjected to moderate-intensity acute (70% 1RM) acute and severe acute activity (85% 1RM) and supplemented with coenzyme Q10 (30 mg /d). CAT and MDA were measured in ELISA using a human kit. Findings Moderate and severe acute resistance activities did not alter MDA and catalytic activity (P>0.05); however, after 2 weeks of coenzyme Q10 supplementation, those resulted in a significant decrease in MDA (0.006 and 0.01, respectively) and CAT (0.04 and 0.007, respectively). There were no significant differences between the effects of two exercises (P>0.05). Conclusion Short-term (two weeks) supplementation of coenzyme Q10 and severe acute resistance activity could reduce two important oxidative stress indexes (MDA and CAT).

scholarly journals Effects of Metformin in Combination with a Herbal Capsule (Glucoblock) on Insulin Resistance and Oxidative Stress Index in Type 2 Diabetic Rats

2021 ◽  
pp. 18-25
Author(s):  
Ojoye N. Briggs ◽  
Kemzi N. Elechi-amadi ◽  
Justice C. Ohaka ◽  
Edna O. Nwachuku ◽  
Bartimaeus S. Ebirien-agana
Keyword(s):  
Oxidative Stress ◽  
Insulin Resistance ◽  
Diabetic Control ◽  
Negative Control ◽  
Diabetic Rats ◽  
Stress Index ◽  
Control Group ◽  
Oxidative Stress Index ◽  
Treatment Groups ◽  
And Oxidative Stress

Aim: This study evaluated the effects of metformin in combination with a herbal capsule (glucoblock) on insulin resistance and oxidative stress index in type 2 diabetic rats. Methodology: A total of 35 male Wistar albino rats weighing between 120-220 g were used for this study. The rats were placed on high fat diet, and diabetes was induced by a single intraperitoneal injection of freshly prepared streptozotocin (STZ) (45 mg/kg body wt). Fasting plasma glucose (FPG) was determined using the glucose oxidase method. Fasting plasma insulin (FPI), total oxidant status (TOS), total antioxidant status (TAS) and superoxide dismutase (SOD) levels were quantitatively determined by a rat-specific sandwich-enzyme linked immunosorbent assay (ELISA) method. Insulin resistance (IR) was determined using the homeostatic model assessment for insulin resistance (HOMA-IR) method. Oxidative stress index (OSI) was determined by the ratio of TOS to TAS. Phytochemical analysis on the herbal capsule was done using classical methods. Results: The results revealed the presence of alkaloids (100.31μg/mg), flavonoids (131.45μg/mg), cardiac glycosides (55.93μg/mg) and saponins (61.47μg/mg) in the herbal drug glucoblock. The results showed significantly lower FPG levels in the treatment groups when compared to the diabetic control. Group 3 administered metformin had significantly higher FPG levels compared to the negative control. Group 4 administered the herbal drug glucoblock and group 5 administered a combination of metformin and glucoblock, showed no significant differences in FPG levels when compared to the negative control. The diabetic control had significantly higher FPI levels compared to the negative control and treatment groups. The treatment groups showed no significant differences in FPI levels when compared to the negative control. HOMA-IR was significantly higher in the diabetic control compared to the negative control and treatment groups. Also, HOMA-IR values in the treatment groups showed no significant difference compared to the negative control except for group 3 (metformin), that was significantly higher than the negative control. SOD was significantly lower in the diabetic control, compared to the negative control and treatment groups. There were no significant differences in SOD levels in the treatment groups compared to the negative control. TOS levels in the negative control group and treatment groups were significantly lower, compared to the diabetic control. TAS was significantly lower in the diabetic control and treatment groups compared to the negative control. OSI in the diabetic control was significantly higher, compared to the negative control and treatment groups. Also, the treatment groups had significantly higher OSI compared to the negative control. Conclusion: High fat diet and streptozotocin induction produced significant insulin resistance and oxidative stress in the diabetic rats. Glucoblock was more effective in reducing insulin resistance compared to metformin. The combination showed synergistic drug-herb reaction as glucoblock potentiated the actions of metformin. Both showed antioxidant potential but were not effective in lowering oxidative stress to normal levels. There is need to incorporate antioxidant therapy in the treatment protocol for diabetes mellitus.

scholarly journals Correlation between the Activity of Aldehyde Dehydrogenase and Oxidative Stress Markers in the Saliva of Diabetic Patients

2019 ◽  
Vol 27 (1) ◽  
pp. 67-73
Author(s):  
Hina Younus ◽  
Sumbul Ahmad ◽  
Md. Fazle Alam
Keyword(s):  
Oxidative Stress ◽  
Aldehyde Dehydrogenase ◽  
Early Stage ◽  
Control Group ◽  
Diabetic Patients ◽  
Oxidative Stress Markers ◽  
Stress Markers ◽  
Patients With Diabetes ◽  
Markers Of Oxidative Stress ◽  
And Oxidative Stress

Background: Reactive aldehydes are involved in diseases associated with oxidative stress, including diabetes. Human salivary aldehyde dehydrogenase (hsALDH) presumably protects us from many toxic ingredient/contaminant aldehydes present in food. Objective: This study aimed to probe the activity of hsALDH in patients with diabetes and than to correlate it with various oxidative stress markers in the saliva. Methods: The saliva samples were collected from total 161 diabetic patients from Rajiv Gandhi Centre for Diabetes, Jawaharlal Nehru Medical College (JNMC), AMU, Aligarh, (India). HsALDH activity and markers of oxidative stress [8-hydroxydeoxyguanosine (8-OHDG), malondialdehyde (MDA) and advanced glycation end products (AGEs)] were measured in the saliva samples. Results: Patients with early stage of diabetes had higher activity of hsALDH when compared with the control group. As the history of diabetes increases, the activity of the enzyme decreases and also higher oxidative stress markers (8-OHDG, MDA and AGEs) are detected in the saliva samples. Negative significant correlation between hsALDH activity and oxidative stress markers were observed (p <0.0001). Conclusion: The activity of hsALDH increases in early stages of diabetes most probably to counter the increased oxidative stress associated with diabetes. However, in later stages of diabetes, the activity of the enzyme decreases, possibly due to its inactivation resulting from glycation.

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