CPIC® Guideline for Potent Volatile Anesthetic Agents and Succinylcholine and RYR1 and CACNA1S update

The ClinGen Malignant Hyperthermia Susceptibility Variant Curation Expert Panel recently published recommendations for RYR1 pathogenicity classifications in malignant hyperthermia susceptibility (PMID: 33767344). These revised ACMG/AMP criteria were applied to the 44 variants originally included in the CPIC recommendations (PMID: 30499100) and 29 variants were classified as pathogenic, 13 as likely pathogenic, and 2 as variants of uncertain significance. Based on this classification, the assignment for the variants c.1589G>A p.(Arg530His) and c.1598G>A p.(Arg533His) has been changed from “malignant hyperthermia-associated” to “uncertain function” in the RYR1 allele functionality table.

Information about the update has been added to the CPIC RYR1, CACNA1S and Volatile anesthetic agents and Succinylcholine guideline page and the PharmGKB annotation for this guideline.