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Galectin-3 Activation and Inhibition in Heart Failure and Cardiovascular Disease: An Update
Navin Suthahar1, Wouter C Meijers1, Herman H W Silljé1
1University Medical Center Groningen, University of Groningen, Department of Cardiology, PO Box 30.001, 9700 RB Groningen, the Netherlands.
Abstract:
Galectin-3 is a versatile protein orchestrating several physiological and pathophysiological processes in the human body. In the last decade, considerable interest in galectin-3 has emerged because of its potential role as a biotarget. Galectin-3 is differentially expressed depending on the tissue type, however its expression can be induced under conditions of tissue injury or stress. Galectin-3 overexpression and secretion is associated with several diseases and is extensively studied in the context of fibrosis, heart failure, atherosclerosis and diabetes mellitus. Monomeric (extracellular) galectin-3 usually undergoes further "activation" which significantly broadens the spectrum of biological activity mainly by modifying its carbohydrate-binding properties. Self-interactions of this protein appear to play a crucial role in regulating the extracellular activities of this protein, however there is limited and controversial data on the mechanisms involved. We therefore summarize (recent) literature in this area and describe galectin-3 from a binding perspective providing novel insights into mechanisms by which galectin-3 is known to be "activated" and how such activation may be regulated in pathophysiological scenarios.
Insights
Galectin-3, a key protein in disease, undergoes activation through self-interaction, altering its function. Understanding this activation mechanism is crucial for targeting galectin-3 in various pathologies like fibrosis and heart failure.
Area of Science:
- Biochemistry
- Molecular Biology
- Pathophysiology
Background:
- Galectin-3 is a protein involved in numerous physiological and pathophysiological processes.
- Its expression is altered in response to tissue injury and stress, and it's linked to diseases such as fibrosis, heart failure, atherosclerosis, and diabetes mellitus.
- Galectin-3 is recognized as a potential therapeutic target due to its role in disease.
Purpose of the Study:
- To review and synthesize recent literature on galectin-3 activation.
- To provide novel insights into the mechanisms of galectin-3 activation from a binding perspective.
- To elucidate how galectin-3 activation is regulated in pathophysiological conditions.
Main Methods:
- Literature review focusing on galectin-3 binding properties and self-interactions.
- Analysis of existing data on galectin-3 activation mechanisms.
- Synthesis of information regarding the regulation of galectin-3 activity in disease contexts.
Main Results:
- Monomeric extracellular galectin-3 can be activated, broadening its biological activities by modifying carbohydrate-binding properties.
- Self-interactions of galectin-3 are critical for regulating its extracellular functions.
- The precise mechanisms of galectin-3 self-interaction and activation remain incompletely understood but are central to its pathophysiological roles.
Conclusions:
- Galectin-3 activation, particularly through self-interaction, significantly impacts its biological functions.
- A deeper understanding of galectin-3 binding and activation mechanisms is essential for developing targeted therapies.
- Further research into galectin-3 regulation in disease states is warranted to explore its therapeutic potential.
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