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SGLT1: A Potential Drug Target for Cardiovascular Disease
Mengnan Zhao1, Na Li1, Hong Zhou1
1Department of Endocrinology, the Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, People's Republic of China.
Abstract:
SGLT1 and SGLT2 are the two main members of the sodium-glucose cotransporters (SGLTs), which are mainly responsible for glucose reabsorption in the body. In recent years, many large clinical trials have shown that SGLT2 inhibitors have cardiovascular protection for diabetic and non-diabetic patients independent of lowering blood glucose. However, SGLT2 was barely detected in the hearts of humans and animals, while SGLT1 was highly expressed in myocardium. As SGLT2 inhibitors also have a moderate inhibitory effect on SGLT1, the cardiovascular protection of SGLT2 inhibitors may be due to SGLT1 inhibition. SGLT1 expression is associated with pathological processes such as cardiac oxidative stress, inflammation, fibrosis, and cell apoptosis, as well as mitochondrial dysfunction. The purpose of this review is to summarize the protective effects of SGLT1 inhibition on hearts in various cell types, including cardiomyocytes, endothelial cells, and fibroblasts in preclinical studies, and to highlight the underlying molecular mechanisms of protection against cardiovascular diseases. Selective SGLT1 inhibitors could be considered a class of drugs for cardiac-specific therapy in the future.
Insights
Sodium-glucose cotransporter-2 (SGLT2) inhibitors may protect the heart by inhibiting SGLT1, which is highly expressed in the myocardium. This review explores SGLT1
Area of Science:
- Cardiovascular Research
- Metabolic Diseases
- Pharmacology
Background:
- Sodium-glucose cotransporter 1 (SGLT1) and SGLT2 are key in glucose reabsorption.
- SGLT2 inhibitors offer cardiovascular protection beyond glucose lowering.
- SGLT1, not SGLT2, is highly expressed in the heart, suggesting a role in cardiovascular effects.
Purpose of the Study:
- To review the cardioprotective effects of SGLT1 inhibition.
- To elucidate the molecular mechanisms underlying SGLT1 inhibition's cardiac benefits.
- To explore the potential of selective SGLT1 inhibitors for cardiac therapy.
Main Methods:
- Review of preclinical studies on SGLT1 inhibition in cardiac cells (cardiomyocytes, endothelial cells, fibroblasts).
- Analysis of molecular pathways involved in SGLT1-mediated cardioprotection.
- Synthesis of existing clinical trial data on SGLT2 inhibitors and cardiovascular outcomes.
Main Results:
- SGLT1 inhibition demonstrates protective effects against cardiac oxidative stress, inflammation, fibrosis, apoptosis, and mitochondrial dysfunction.
- Evidence suggests SGLT1 inhibition contributes to the cardiovascular benefits of SGLT2 inhibitors.
- Preclinical data support SGLT1's role in various cardiac pathologies.
Conclusions:
- SGLT1 inhibition presents a promising therapeutic strategy for cardiovascular diseases.
- Selective SGLT1 inhibitors may offer a novel approach to cardiac-specific treatment.
- Further research into SGLT1-targeted therapies is warranted.
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