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Modulatory effects of CNNM4 on protein- l -isoaspartyl- O -methyltransferase repair function during alcohol-induced hepatic damage. | LitMetric

AI Article Synopsis

  • - Alcohol-associated liver disease (ALD) is a major cause of liver-related deaths, with few treatment options, and chronic alcohol use is connected to magnesium deficiency, potentially affecting liver disease progression.
  • - The study found that the magnesium transporter CNNM4 is overexpressed in both patients with ALD and animal models, leading to magnesium homeostasis imbalance and disease progression; silencing CNNM4 shows promise as a new treatment strategy.
  • - Targeting CNNM4 using N-acetylgalactosamine silencing RNA can enhance mitochondrial function and restore essential repair mechanisms in the liver, ultimately improving outcomes for ALD patients by repairing ethanol-induced protein damage.

Article Abstract

Background And Aims: Alcohol-associated liver disease (ALD) is a leading cause of liver-related mortality worldwide, with limited treatment options beyond abstinence and liver transplantation. Chronic alcohol consumption has been linked to magnesium (Mg 2+ ) deficiency, which can influence liver disease progression. The mechanisms underlying Mg 2+ homeostasis dysregulation in ALD remain elusive. This study aimed to investigate the role of the Mg 2+ transporter Cyclin M4 (CNNM4) in ALD by analyzing its expression patterns in patients with ALD and preclinical animal models.

Approach And Results: In this study, CNNM4 is upregulated in the liver of both patients with ALD and animal models. CNNM4 overexpression triggers Mg 2+ homeostasis dysregulation, linked to ALD progression. We propose a novel therapeutic approach for ALD treatment using N -acetylgalactosamine silencing RNA technology to specifically modulate Cnnm4 expression in the liver, improving mitochondrial function and alleviating endoplasmic reticulum stress. Notably, silencing Cnnm4 restores protein isoaspartyl methyltransferase (PCMT1) activity, essential for repairing ethanol-induced protein damage. Enhancing mitochondrial activity through Cnnm4-dependent mechanisms increases S -adenosylmethionine levels, crucial for PCMT1 function, highlighting the interconnected roles of mitochondrial health and protein homeostasis in ALD treatment.

Conclusions: These findings shed light on the dysregulation of Mg 2+ homeostasis in ALD, providing a promising therapeutic approach targeting CNNM4. N -acetylgalactosamine si Cnnm4 therapy boosts the repair processes of ethanol-damaged proteins through the upregulation of PCMT1 activity.

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Source
http://dx.doi.org/10.1097/HEP.0000000000001156DOI Listing

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