Protective effect and mechanism of Ginkgo biloba extract-EGb 761 on STZ-induced diabetic cardiomyopathy in rats
UNLABELLED: Diabetes mellitus (DM) is a complex metabolic disorder which leads to development of various long-term complications including cardiomyopathy. Oxidative stress due to hyperglycemia plays a key role in the development and progression of diabetic cardiomyopathy (DC). Oxidative stress causes the opening of mitochondrial permeability transition pore (mPTP) eventually leading to myocardium dysfunction. The Ginkgo biloba extract (EGb 761) has antioxidant and mitochondrial membrane potential stabilizing property. Therefore, this study was designed to evaluate the effect of EGb 761 and its possible mechanism of action in DC.
MATERIALS AND METHODS: DM was induced by single injection of Streptozotocin (STZ) (50 mg/kg, i.p.) and cardiac dysfunction was developed on 8(th) weeks after STZ injection. Cardiac dysfunction was assessed by measuring left ventricle weight/body weight (LVW/BW) ratio, left ventricle (LV) collagen content, LV protein content, serum lactate dehydrogenase (LDH) level.
RESULTS: EGb 761 treatment (started after 7(th) week of STZ injection and continued for 3 weeks) attenuated cardiac dysfunction in diabetic rats as evidenced by a decrease in LV collagen content, protein content, LVW/BW ratio, serum LDH level. Moreover, EGb 761 attenuated the oxido-nitrosative stress (thiobarbituric acid reactive substances, superoxide anion generation, myocardium nitrite) and concomitantly improved the antioxidant enzyme (reduced glutathione) level as compared to untreated diabetic rats. However, protective effect of EGb 761 was inhibited by atractyloside (mPTP opener) that was given for 3 weeks, 30 min before the EGb 761 treatment. These results indicate that EGb 761 corrects diabetic cardiac dysfunction probably by its direct radical scavenging activity and its ability to inhibit the opening of mPTP channel since the cardioprotective effect of EGb 761 was completely abolished by atractyloside.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2014 |
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| Erschienen: |
2014 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:10 |
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| Enthalten in: |
Pharmacognosy magazine - 10(2014), 38 vom: 01. Apr., Seite 172-8 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Saini, Arminder Singh [VerfasserIn] |
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| Links: |
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| Themen: |
Cardioprotective |
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| Anmerkungen: |
Date Completed 10.06.2014 Date Revised 21.10.2021 published: Print Citation Status PubMed-not-MEDLINE |
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| doi: |
10.4103/0973-1296.131031 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM239040937 |
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| 100 | 1 | |a Saini, Arminder Singh |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Protective effect and mechanism of Ginkgo biloba extract-EGb 761 on STZ-induced diabetic cardiomyopathy in rats |
| 264 | 1 | |c 2014 | |
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| 500 | |a Date Completed 10.06.2014 | ||
| 500 | |a Date Revised 21.10.2021 | ||
| 500 | |a published: Print | ||
| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a UNLABELLED: Diabetes mellitus (DM) is a complex metabolic disorder which leads to development of various long-term complications including cardiomyopathy. Oxidative stress due to hyperglycemia plays a key role in the development and progression of diabetic cardiomyopathy (DC). Oxidative stress causes the opening of mitochondrial permeability transition pore (mPTP) eventually leading to myocardium dysfunction. The Ginkgo biloba extract (EGb 761) has antioxidant and mitochondrial membrane potential stabilizing property. Therefore, this study was designed to evaluate the effect of EGb 761 and its possible mechanism of action in DC | ||
| 520 | |a MATERIALS AND METHODS: DM was induced by single injection of Streptozotocin (STZ) (50 mg/kg, i.p.) and cardiac dysfunction was developed on 8(th) weeks after STZ injection. Cardiac dysfunction was assessed by measuring left ventricle weight/body weight (LVW/BW) ratio, left ventricle (LV) collagen content, LV protein content, serum lactate dehydrogenase (LDH) level | ||
| 520 | |a RESULTS: EGb 761 treatment (started after 7(th) week of STZ injection and continued for 3 weeks) attenuated cardiac dysfunction in diabetic rats as evidenced by a decrease in LV collagen content, protein content, LVW/BW ratio, serum LDH level. Moreover, EGb 761 attenuated the oxido-nitrosative stress (thiobarbituric acid reactive substances, superoxide anion generation, myocardium nitrite) and concomitantly improved the antioxidant enzyme (reduced glutathione) level as compared to untreated diabetic rats. However, protective effect of EGb 761 was inhibited by atractyloside (mPTP opener) that was given for 3 weeks, 30 min before the EGb 761 treatment. These results indicate that EGb 761 corrects diabetic cardiac dysfunction probably by its direct radical scavenging activity and its ability to inhibit the opening of mPTP channel since the cardioprotective effect of EGb 761 was completely abolished by atractyloside | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Cardioprotective | |
| 650 | 4 | |a EGb 761 | |
| 650 | 4 | |a diabetes mellitus | |
| 650 | 4 | |a mPTP channel | |
| 650 | 4 | |a oxidative stress | |
| 700 | 1 | |a Taliyan, Rajeev |e verfasserin |4 aut | |
| 700 | 1 | |a Sharma, Pyare Lal |e verfasserin |4 aut | |
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