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Published on: July 20, 2022
Osteopontin in Atrial Fibrillation and Atrial Remodeling
Argen Mamazhakypov1, Balram Neupane2, Akpay Sarybaev3
1Department of Internal Medicine, Institute for Lung Health, Cardio-Pulmonary Institute, Member of the German Center for Lung Research Justus Liebig University of Giessen Giessen Germany.
Insights
Osteopontin plays a key role in atrial remodeling and the development of atrial fibrillation (AF). Elevated osteopontin levels may serve as a biomarker for this common heart arrhythmia.
Area of Science:
- Cardiology
- Molecular Biology
- Biochemistry
Background:
- Atrial fibrillation (AF) is a prevalent cardiac arrhythmia with poorly understood mechanisms, often involving atrial inflammation and fibrosis.
- Osteopontin, an extracellular matrix protein, is increasingly recognized for its involvement in cardiovascular diseases.
Purpose of the Study:
- To review the role of osteopontin in atrial remodeling and arrhythmogenesis.
- To examine osteopontin's molecular mechanisms in structural and electrical atrial remodeling.
- To assess osteopontin's potential as a biomarker for atrial fibrillation.
Main Methods:
- Review of recent human and in vitro studies on osteopontin's function in cardiovascular disease.
- Analysis of osteopontin's modulation of cellular processes like fibroblast activation and cytokine production.
- Examination of osteopontin's association with atrial fibrillation prevalence and progression.
Main Results:
- Osteopontin is implicated in atrial myocardial inflammation and fibrosis, key to AF pathogenesis.
- Circulating osteopontin levels correlate with atrial fibrillation presence and progression in human studies.
- In vitro data show osteopontin influences fibroblast activation, extracellular matrix remodeling, and inflammation.
Conclusions:
- Osteopontin is a significant mediator of atrial remodeling and arrhythmogenesis.
- Osteopontin holds potential as a valuable biomarker for atrial fibrillation.
- Understanding osteopontin's molecular role may lead to novel therapeutic strategies for AF.
Abstract:
Atrial fibrillation is the most prevalent sustained cardiac arrhythmia, characterized by limited therapeutic options because of incompletely understood mechanisms of its development. The key underlying pathogenetic mechanisms involve atrial myocardial inflammation and fibrosis in response to pressure or volume overload, myocardial infarction, as well as metabolic alterations. Recent studies have highlighted the crucial role of osteopontin in diverse cardiovascular diseases, including atrial fibrillation. Osteopontin is a multifunctional extracellular matrix protein that has recently emerged as a potential mediator of atrial remodeling and arrhythmogenesis. Human studies have revealed that circulating osteopontin levels can serve as a valuable biomarker for atrial fibrillation and its progression. Furthermore, in vitro studies have demonstrated that osteopontin modulates several key cellular processes involved in atrial inflammation and fibrosis, including fibroblast activation, extracellular matrix remodeling, and proinflammatory cytokine production. This review critically examines the available evidence on the role of osteopontin in atrial remodeling and arrhythmia starting from the molecular mechanisms by which osteopontin contributes to structural and electrical remodeling of the atria, to its potential as a biomarker for atrial fibrillation.
