SUCNR1
SUCNR1 (Succinate Receptor 1), also known as GPR91, is a G protein-coupled receptor (GPCR) that has been identified as a receptor for succinate, an intermediate of the citric acid cycle (TCA cycle) that plays a crucial role in cellular metabolism and energy production. The discovery of SUCNR1 has significantly advanced our understanding of how succinate acts as a signaling molecule, influencing a wide range of physiological and pathological processes.
Function[edit | edit source]
SUCNR1 is expressed in various tissues, including the kidney, liver, heart, spleen, and retina, indicating its diverse roles in the body. Upon binding to succinate, SUCNR1 activates intracellular signaling pathways that can influence blood pressure, inflammation, and tissue repair. In the kidney, for example, activation of SUCNR1 by succinate has been linked to the regulation of blood pressure and the renin-angiotensin system, a hormone system that regulates blood pressure and fluid balance. In the immune system, succinate has been shown to act as a signal for inflammation, where it can attract immune cells to sites of tissue damage or infection.
Clinical Significance[edit | edit source]
The role of SUCNR1 in disease has become a subject of intense research. Its involvement in mechanisms such as hypertension, diabetes, inflammation, and tissue injury suggests that it could be a potential target for therapeutic intervention. For instance, modulating SUCNR1 activity has been proposed as a strategy to treat high blood pressure and reduce the risk of cardiovascular diseases. Additionally, because succinate levels are often elevated in inflammatory conditions, targeting SUCNR1 could help in the management of chronic inflammatory diseases.
Research[edit | edit source]
Research into SUCNR1 has also extended into the field of metabolism and metabolic diseases. Studies have suggested that succinate, through SUCNR1, can influence metabolic pathways, potentially linking it to conditions such as obesity and type 2 diabetes. Furthermore, the role of SUCNR1 in the retina suggests it may be involved in the regulation of blood flow to the eye and possibly in the pathogenesis of diseases such as diabetic retinopathy.
Future Directions[edit | edit source]
The ongoing research into SUCNR1 and its ligand succinate is opening new avenues for understanding how metabolism is connected to a range of physiological responses and disease processes. As our knowledge of this receptor expands, so too does the potential for developing novel therapeutic strategies that target the succinate-SUCNR1 signaling pathway.
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Contributors: Prab R. Tumpati, MD