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Alshehri AS, El-Kott AF, Eleawa SM, El-Gerbed MSA, Khalifa HS, El-Kenawy AE, Albadrani GM, Abdel-Daim MM. Kaempferol protects against streptozotocin-induced diabetic cardiomyopathy in rats by a hypoglycemic effect and upregulating SIRT1. J Physiol Pharmacol 2021; 72. [PMID: 34810287 DOI: 10.26402/jpp.2021.3.04] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 06/30/2021] [Indexed: 11/03/2022]
Abstract
This study investigated if kaempferol could attenuate the oxidative, inflammatory, and fibrotic damage of the left ventricles (LVs) in streptozotocin (STZ)-diabetic rats by modulating silent mating type information regulation 2 homolog 1 (SIRT1) signaling. Adult male rats were divided into 5 groups (n = 12/each) as control, control + kaempferol, STZ-induced diabetes mellitus (STZ-DM), STZ-DM + kaempferol, and STZ-DM + kaempferol + EX-527, a sirtuin 1 (SIRT1) inhibitor. Administration of kaempferol to diabetic rats significantly preserved the systolic and diastolic functions of the LVs that was associated with a significant reduction in ventricular collagen deposition, infiltration of inflammatory cells, and protein expression of Bcl2-associated X protein (Bax), cleaved caspase-3, and cytochrome-C. In both the control and diabetic rats, kaempferol attenuated the loss in body weights, reduced fasting glucose levels, and increased fasting insulin levels and HOMA-β. Besides, kaempferol lowered the levels of reactive oxygen species (ROS), malondialdehyde (MDA), tumor necrosis factor-α (TNF-α), and interleukin-6 (IL-6), downregulated the transforming growth factor-β1 (TGF-β1) and reduced the nuclear levels of NF-κB p65. In concomitant, kaempferol increased the LV levels of manganese superoxide dismutase (MnSOD) and glutathione (GSH) and stimulated the total protein levels of Bcl2, the nuclear activity of SIRT1, and nuclear levels of nuclear factor erythroid 2-related factor 2 (Nrf2). These events were associated with increased deacetylase activity and total levels of SIRT1 and a parallel decrease in the acetylation of Nrf2, NF-κB, smad2, and FOXO1. In conclusion: kaempferol attenuate diabetic cardiomyopathy in STZ-treated rats through its hypoglycaemic and insulin-releasing effects, as well as a cardiac independent mechanism that involves activation of SIRT1.
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Affiliation(s)
- A S Alshehri
- Biology Department, College of Science, King Khalid University, Abha, Saudi Arabia
| | - A F El-Kott
- Biology Department, College of Science, King Khalid University, Abha, Saudi Arabia. ; ; .,Zoology Department, College of Science, Damanhour University, Damanhour, Egypt
| | - S M Eleawa
- Applied Medical Sciences Department, College of Health Sciences, PAAET, Safat, Kuwait
| | - M S A El-Gerbed
- Zoology Department, College of Science, Damanhour University, Damanhour, Egypt
| | - H S Khalifa
- Zoology Department, College of Science, Damanhour University, Damanhour, Egypt
| | - A E El-Kenawy
- Pathology Department, College of Medicine, Taif University, Taif, Saudi Arabia
| | - G M Albadrani
- Biology Department, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
| | - M M Abdel-Daim
- Pharmaceutical Sciences Department, Pharmacy Program, Batterjee Medical College, Jeddah, Saudi Arabia.,Pharmacology Department, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, Egypt
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