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Updated: Jul 31, 2025
Induction and Assessment of Ischemia-reperfusion Injury in Langendorff-perfused Rat Hearts
Published on: July 27, 2015
Methods for studying primary cilia in heart tissue after ischemia-reperfusion injury
Catalina Kretschmar1, María Paz Hernández-Cáceres2, Montserrat Reyes3
1Instituto de Investigación en Ciencias Odontológicas (ICOD), Facultad de Odontología, Universidad de Chile, Santiago, Chile; Advanced Center for Chronic Diseases (ACCDiS), Facultad de Ciencias Químicas y Farmacéuticas & Facultad de Medicina, Universidad de Chile, Santiago, Chile; Autophagy Research Center, Universidad de Chile, Santiago, Chile.
Insights
Primary cilia are crucial for cardiac fibrosis following heart injury. This study details methods to investigate the presence and function of these structures in cardiac remodeling after ischemia/reperfusion injury in mice.
Area of Science:
- Cardiovascular Biology
- Cellular Biology
- Fibrosis Research
Background:
- Cardiovascular diseases are a leading global cause of mortality.
- Heart injury from myocardial ischemia/infarction leads to tissue damage and fibrotic replacement.
- Primary cilia are implicated in signaling pathways relevant to cardiac fibrosis.
Purpose of the Study:
- To describe methods for evaluating primary cilia in cardiac fibroblasts.
- To investigate the role of primary cilia in cardiac fibrosis after ischemia/reperfusion (I/R) injury.
- To address the functional relevance of cilia-dependent signaling in myocardial injury.
Main Methods:
- Utilizing mouse models of myocardial ischemia/reperfusion (I/R) injury.
- Employing techniques to identify and quantify primary cilia in cardiac fibroblasts.
- Assessing the impact of cilia on fibrosis development and cardiac remodeling.
Main Results:
- Primary cilia are present and enriched in cardiac fibroblasts at sites of I/R-induced myocardial injury.
- Ciliated cardiac fibroblasts play a role in the fibrotic response to cardiac injury.
- Cilia-dependent signaling pathways are involved in I/R-induced cardiac fibrosis.
Conclusions:
- Primary cilia are integral components of the fibrotic response in the injured heart.
- Understanding cilia's role offers potential therapeutic targets for cardiovascular diseases.
- Further investigation into cilia-dependent signaling is warranted for cardiac fibrosis.
Abstract:
Cardiovascular diseases are the leading cause of death and disability worldwide. After heart injury triggered by myocardial ischemia or myocardial infarction, extensive zones of tissue are damaged and some of the tissue dies by necrosis and/or apoptosis. The loss of contractile mass activates a series of biochemical mechanisms that allow, through cardiac remodeling, the replacement of the dysfunctional heart tissue by fibrotic material. Our previous studies have shown that primary cilia, non-motile antenna-like structures at the cell surface required for the activation of specific signaling pathways, are present in cardiac fibroblasts and required for cardiac fibrosis induced by ischemia/reperfusion (I/R) in mice. I/R-induced myocardial fibrosis promotes the enrichment of ciliated cardiac fibroblasts where the myocardial injury occurs. Given discussions about the existence of cilia in specific cardiac cell types, as well as the functional relevance of studying cilia-dependent signaling in cardiac fibrosis after I/R, here we describe our methods to evaluate the presence and roles of primary cilia in cardiac fibrosis after I/R in mice.
