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Updated: Aug 16, 2026
Functional Characterization of Endogenously Expressed Human RYR1 Variants
Published on: June 9, 2021
Ryanodine receptor 1 mutations, dysregulation of calcium homeostasis and neuromuscular disorders
Susan Treves1, Ayuk A Anderson, Sylvie Ducreux
1Dipartimento di Medicina Sperimentale e Diagnostica, sezione Patologia Generale, Università degli Studi di Ferrara, Via Borsari 46, 44100 Ferrara, Italy.
Abstract:
The skeletal muscle ryanodine receptor is an intracellular calcium release channel which plays a central role in excitation contraction coupling. At least 80 mutations have been identified in the gene encoding the skeletal muscle ryanodine receptor and linked to several neuromuscular disorders, whose common feature appears to be a dysregulation of calcium homeostasis. A decade of research into the functional consequences of how these mutations affect the functional properties of the ryanodine receptor and their impact on disease, have significantly advanced our understanding of Malignant Hyperthermia, Central Core Disease and Multiminicore Disease. This review gives an overview of the important findings in the field of calcium homeostasis in skeletal muscle and describes how mutations in the ryanodine receptor gene might affect the function of this intracellular calcium release channel and lead to neuromuscular disorders.
Insights
Mutations in the skeletal muscle ryanodine receptor gene disrupt calcium homeostasis, leading to neuromuscular disorders like Malignant Hyperthermia. Understanding these changes is key to advancing treatment for these debilitating conditions.
Area of Science:
- Physiology
- Molecular Biology
- Genetics
Background:
- The skeletal muscle ryanodine receptor is crucial for muscle contraction by regulating intracellular calcium release.
- Dysregulation of calcium homeostasis is a common feature in various neuromuscular disorders.
- Over 80 mutations in the ryanodine receptor gene are linked to neuromuscular diseases.
Purpose of the Study:
- To review the current understanding of calcium homeostasis in skeletal muscle.
- To explore how mutations in the ryanodine receptor gene impact its function.
- To elucidate the link between ryanodine receptor gene mutations and neuromuscular disorders.
Main Methods:
- Literature review of research on ryanodine receptor mutations and neuromuscular disorders.
- Analysis of functional consequences of identified mutations on ryanodine receptor activity.
- Examination of the role of calcium dysregulation in disease pathogenesis.
Main Results:
- Significant advancements in understanding Malignant Hyperthermia, Central Core Disease, and Multiminicore Disease.
- Mutations alter the functional properties of the ryanodine receptor, affecting calcium release.
- Altered calcium signaling is a central mechanism in these genetic neuromuscular disorders.
Conclusions:
- Mutations in the skeletal muscle ryanodine receptor gene are directly implicated in neuromuscular disorders.
- Understanding these mutations' effects on calcium channels is vital for disease mechanisms.
- Further research into ryanodine receptor function and calcium homeostasis can inform therapeutic strategies.
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