Autoinflammatory & rare systemic diseases

A Multicenter Integrative Cohort Characterizing the Genetic, Clinical, and Transcriptomic Features of ACP5 Deficiency

Arthritis RheumatolPublished Multicentre cohort study with integration of previously reported cases

Authors' conclusion

This study expanded the genetic and clinical spectrum of ACP5 deficiency. An up-regulated IFN signature was revealed, and monocytes were identified as a major cellular source of inflammation.

Study context

Population
Patients with SPENCDI (ACP5 deficiency) from Egypt and China, integrated with previously reported casesnew cohort
Participants
17 patients
Outcome
Genetic and clinical spectrum of ACP5 deficiency (SPENCDI): variants identified and clinical manifestations
Methodological detailswhole-exome sequencing, bulk and single-cell RNA sequencing
  • Whole-exome sequencing
  • Bulk and single-cell RNA sequencing

Main finding

As reported in the abstract

Patients with ACP5 deficiency identified (Egypt and China)
17
Novel pathogenic variants (A260D, L257P, G32D, K190Nfs*22, T305Nfs*12)
5
Novel missense variants with loss of tartrate-resistant acid phosphatase (TRAP) activity
3
Skeletal system involvement (most frequent)
32.31%
Skeletal dysplasia
94.32%
Short stature
81.82%

Observational data: associations, not effects.

Original publication

A Multicenter Integrative Cohort Characterizing the Genetic, Clinical, and Transcriptomic Features of ACP5 Deficiency. Arthritis Rheumatol. Published 16 July 2026. doi:10.1002/art.70279

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