SCN9A Gene

What is the SCN9A gene?

SCN9A encodes sodium voltage-gated channel alpha subunit 9, a protein involved in voltage-gated sodium channel signaling. It belongs to the Pain Sensory category and is part of the Pain & Sensory Processing biological cluster. SCN9A encodes Nav1.7, a voltage-gated sodium channel critical for pain signal transmission in peripheral sensory neurons.

Biological role and pathway

SCN9A is involved in the voltage-gated sodium channel signaling pathway, which plays a central role in regulating physiological processes relevant to immune defence, cellular energy, and systemic homeostasis. Genes within the Pain & Sensory Processing cluster work together to maintain balanced function across interconnected biological systems.

Variants in genes within this pathway may influence an individual's predisposition to altered function in these systems — particularly under conditions of physiological stress such as viral infection or prolonged illness.

Known genetic variants

The following variants (SNPs) in the SCN9A gene have been studied in relation to pain sensory and chronic illness. Each variant represents a single nucleotide position where individuals may carry different alleles.

• rs6754031— SCN9A variant
• rs4369876— SCN9A variant

Conditions studied in relation to SCN9A

Research into SCN9A variants has explored associations with the following conditions. These are areas of scientific investigation and do not imply that SCN9A causes or treats any condition.

Genetic insights from DNA data

Consumer DNA files from 23andMe, AncestryDNA, and MyHeritage contain raw SNP data. When you upload your file to ChronicDNA, the analysis engine checks your genotype against a curated panel of 80+ genes selected for their relevance to Long COVID, ME/CFS, and connected biological pathways - some of which may include SCN9A and related genes in the pain & sensory processing pathway.

The report is educational - it explains which variants you carry, what the research says about them, and how they fit into the biological pathways most relevant to chronic illness. Results are presented in plain English with appropriate scientific context, no medical jargon, no scare tactics. All results should be discussed with a qualified healthcare provider.

Related genes in the Pain & Sensory Processing pathway

SCN9A does not act in isolation. The following genes are functionally related and may be analysed together for a more complete picture of your genetic predispositions.

Frequently asked questions