Autoinflammatory & rare systemic diseases

Clinical Manifestations of VEXAS Syndrome Across a Broad Spectrum of UBA1 Mutation Burden

Arthritis RheumatolPublished Cross-sectional study

Authors' conclusion

VEXAS syndrome disease severity and penetrance increase at higher VAFs.

Study context

Population
Participants of Geisinger MyCode Community Health Initiative and Mount Sinai BioMe Biobank with disease-causing UBA1 variantsof 192,584 sequenced
Participants
23 participants
Exposure
High UBA1 variant allele frequency (VAF) vs low VAF
Outcome
Macrocytic anaemia development
Methodological detailswhole exome sequencing, two biobanks
  • Whole exome sequencing
  • Two biobanks

Main finding

As reported in the abstract

P = 0.009

Observational data: associations, not effects.

Further findings

OutcomeLow VAFP value
Macrocytic anaemia at time of genetic testing13.3%P = 0.001
Development of anaemia or thrombocytopenia · no significant difference
P = 0.53

Original publication

Clinical Manifestations of VEXAS Syndrome Across a Broad Spectrum of UBA1 Mutation Burden. Arthritis Rheumatol. Published 21 September 2025. doi:10.1002/art.43327

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