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Monitoring mitochondrial calcium and metabolism in the beating MCU-KO heart
- Source :
- Cell Reports; October 2021, Vol. 37 Issue: 3
- Publication Year :
- 2021
-
Abstract
- Optical methods for measuring intracellular ions including Ca2+revolutionized our understanding of signal transduction. However, these methods are not extensively applied to intact organs due to issues including inner filter effects, motion, and available probes. Mitochondrial Ca2+is postulated to regulate cell energetics and death pathways that are best studied in an intact organ. Here, we develop a method to optically measure mitochondrial Ca2+and demonstrate its validity for mitochondrial Ca2+and metabolism using hearts from wild-type mice and mice with germline knockout of the mitochondria calcium uniporter (MCU-KO). We previously reported that germline MCU-KO hearts do not show an impaired response to adrenergic stimulation. We find that these MCU-KO hearts do not take up Ca2+, consistent with no alternative Ca2+uptake mechanisms in the absence of MCU. This approach can address the role of mitochondrial Ca2+to the myriad of functions attributed to alterations in mitochondrial Ca2+.
Details
- Language :
- English
- ISSN :
- 22111247
- Volume :
- 37
- Issue :
- 3
- Database :
- Supplemental Index
- Journal :
- Cell Reports
- Publication Type :
- Periodical
- Accession number :
- ejs58074219
- Full Text :
- https://doi.org/10.1016/j.celrep.2021.109846