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Orientin Alleviates Oxidative Stress And Apoptosis In Diabetic Cardiomyopathy Via The Lncrna
Xun Wang1, Xiaofang Xiong1, Wei Jiang1
1Wuhan Third Hospital, Wuhan - China.
Background:
Diabetic cardiomyopathy (DCM) is an irreversible cardiovascular complication of diabetes mellitus characterized by detrimental cardiac remodeling. Orientin, a water-soluble flavonoid present in many medicinal plants, exerts various pharmacological effects.
Objectives:
To investigate the cardioprotective effects of orientin in diabetic conditions and elucidate the mechanisms associated with non-coding RNAs.
Methods:
The streptozotocin-induced DCM model was established by a combined use of streptozotocin and a high-fat diet. Cardiac structure and function in diabetes mellitus mice were evaluated using histological and echocardiographic analyses. Masson, TUNEL, western blot, and ELISA in mouse hearts were performed to analyze cardiac fibrosis, apoptosis, and oxidative stress. Expression levels of lncRNA H19, miR-103-3p, ALDH2, and PI3K/AKT-related proteins in mouse heart and HL-1 cells were evaluated using real-time qPCR or western blot. The significance level was set at p<0.05.
Results:
Orientin improved cardiac function and ameliorated cardiac injury in diabetic mice. Orientin inhibited cardiac fibrosis, reduced cardiomyocyte apoptosis, and increased the activities of antioxidant enzymes. In pathological conditions, H19 and ALDH2 levels were reduced while miR-103-3p levels increased, which were reversed by orientin. H19 upregulated ALDH2 expression by binding to miR-103-3p and activated the PI3K/AKT pathway in high glucose-treated HL-1 cells. H19 depletion or PI3K inhibitor reversed the effects of orientin on apoptosis and oxidative stress in HL-1 cells under high glucose conditions.
Conclusions:
These findings reveal a protective mechanism of orientin in DCM, which involves the regulation of the H19/miR-103-3p/ALDH2/PI3K/AKT signaling axis, providing a potential strategy for treating DCM.
Insights
Orientin protects against diabetic cardiomyopathy by regulating the H19/miR-103-3p/ALDH2/PI3K/AKT pathway. This study offers a potential therapeutic strategy for diabetic heart disease.
Area of Science:
- Cardiovascular Research
- Molecular Biology
- Pharmacology
Background:
- Diabetic cardiomyopathy (DCM) is a severe complication of diabetes mellitus, leading to irreversible cardiac remodeling.
- Orientin, a flavonoid from medicinal plants, possesses known pharmacological benefits.
Purpose of the Study:
- To investigate orientin's cardioprotective effects in diabetic conditions.
- To elucidate the role of non-coding RNAs in orientin's mechanism of action.
Main Methods:
- A mouse model of streptozotocin-induced diabetic cardiomyopathy was established.
- Cardiac function, fibrosis, apoptosis, and oxidative stress were assessed.
- Expression of lncRNA H19, miR-103-3p, ALDH2, and PI3K/AKT pathway proteins was analyzed.
Main Results:
- Orientin improved cardiac function and reduced injury in diabetic mice.
- Orientin inhibited fibrosis, apoptosis, and oxidative stress, while reversing altered H19, miR-103-3p, and ALDH2 levels.
- The H19/miR-103-3p/ALDH2 axis and PI3K/AKT pathway were identified as key mediators.
Conclusions:
- Orientin demonstrates cardioprotective effects in DCM via the H19/miR-103-3p/ALDH2/PI3K/AKT signaling pathway.
- This pathway regulation presents a potential therapeutic target for treating diabetic cardiomyopathy.
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