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Is Complement Deficiency Genetic?
- Heritability
- ~100%
- Inheritance
- autosomal-recessive
- Key genes
- C3,C5,C6,C7
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Hereditary complement deficiencies predispose to recurrent bacterial infections particularly with encapsulated organisms. C2 deficiency is the most common complement deficiency.
How Genetic Is Complement Deficiency?
Complement Deficiency has a strong genetic basis. Research estimates heritability at approximately 100%, meaning genetic factors account for the majority of variation in whether individuals develop this condition.
Key genes associated with Complement Deficiency: C3,C5,C6,C7. Variants in these genes have been identified through genome-wide association studies (GWAS) and clinical research as influencing susceptibility or severity.
Source: MedlinePlus Genetics
Does Family History Matter for Complement Deficiency?
Yes — family history is one of the strongest predictors of Complement Deficiency. If a first-degree relative (parent, sibling, or child) has been diagnosed, your own risk may be significantly elevated. Discussing your family history with a healthcare provider or genetic counsellor is strongly recommended.
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