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FLRT3 – Kallmann syndrome

In a targeted sequencing study of 386 unrelated CHH individuals and 155 controls, heterozygous missense variants in FLRT3 were identified in 3 probands with Kallmann syndrome ([PMID:23643382]). The variants included c.1016A>G (p.Lys339Arg) and two additional missense changes, all absent from controls and population databases.

No family segregation or CHH-specific functional assays for FLRT3 were reported. Given the small proband count and absence of segregation or in vitro disease modeling, the overall clinical validity is Limited. Key take-home: FLRT3 is a candidate contributor to KS in an oligogenic FGFR1 pathway context, meriting further familial and mechanistic studies before routine diagnostic implementation.

References

  • American journal of human genetics • 2013 • Mutations in FGF17, IL17RD, DUSP6, SPRY4, and FLRT3 are identified in individuals with congenital hypogonadotropic hypogonadism. PMID:23643382

Evidence Based Scoring (AI generated)

Gene–Disease Association

Limited

3 probands with FLRT3 variants ([PMID:23643382]), no segregation or disease-specific functional validation

Genetic Evidence

Limited

Heterozygous missense variants in 3 unrelated KS cases; absent in controls

Functional Evidence

Limited

No functional assays linking FLRT3 variants to CHH/KS pathogenesis