rs11881222 IFNL3
Allele G is associated with increased response to peginterferon alfa-2a and ribavirin in people with Hepatitis C, Chronic as compared to allele A.
What is rs11881222?
rs11881222 is a single-nucleotide polymorphism (SNP) in the IFNL3 gene (Interferon lambda 3). Each person carries two copies, one from each parent, so a result is reported as a pair of letters such as G. The table below describes what studies associate with each genotype; the association is statistical, across populations, and is not a diagnosis.
What does each rs11881222 genotype mean?
| Genotype | Association | What the evidence says | Confidence |
|---|---|---|---|
| G | typical | Allele G is associated with increased response to peginterferon alfa-2a and ribavirin in people with Hepatitis C, Chronic as compared to allele A. | 80% |
| AA | typical | Genotype AA is associated with increased response to peginterferon alfa-2a, peginterferon alfa-2b and ribavirin in people with Hepatitis C, Chronic as compared to genotype AG. | 80% |
Which drugs have annotations for rs11881222?
PharmGKB clinical annotations (level 1A is the strongest evidence, 4 the weakest):
| Drug | Annotation type | Evidence level |
|---|---|---|
| Allele G is associated with increased response to peginterferon alfa-2a and ribavirin in people with Hepatitis C, Chronic as compared to allele A., Genotype AA is associated with increased response to peginterferon alfa-2a, peginterferon alfa-2b and ribavirin in people with Hepatitis C, Chronic as compared to genotype AG. |
Is rs11881222 on 23andMe and AncestryDNA chips?
Chip coverage is not recorded for this variant. Orviva reports it when a raw-data file contains it directly or via a well-correlated proxy SNP, and says so when it does not.
Sources
Upload your 23andMe, AncestryDNA or WeGene raw file → · Ask G2: “What is my genotype at rs11881222 and what does it mean for me?”
Genetic associations describe risk across populations, not a diagnosis for any one person. Most variants shift risk modestly and act alongside lifestyle, environment and other genes. Consumer DNA chips do not read every position and can be wrong at any single one. For general education only; talk to a clinician or genetic counsellor before acting on anything here, and never change a prescribed medicine without your prescriber.