A syndromic extreme insulin resistance caused by biallelic POC1A mutations in exon 10

Elisa Giorgio, Elisa Rubino, Alessandro Bruselles, Simone Pizzi, Innocenzo Rainero, Sergio Duca, Fabio Sirchia, Barbara Pasini, Marco Tartaglia, Alfredo Brusco

Research output: Contribution to journalArticlepeer-review


POC1A encodes a protein with a role in centriole assembly and stability, and in ciliogenesis. Biallelic loss-of-function mutations affecting POC1A cause SOFT syndrome, an ultra-rare condition characterized by short stature, onychodysplasia, facial dysmorphism and hypotrichosis. Using exome sequencing, we identified a homozygous frameshift mutation (c.1047_1048dupC; p.G337Rfs*25) in a patient presenting with short stature, facial hirsutism, alopecia, dyslipidemia and extreme insulin resistance. The truncating variant affected exon 10, which is retained in only two of the three POC1A-mature RNAs, due to alternative processing of the transcript. Clinical discrepancies with SOFT syndrome support the hypothesis that POC1A mutations affecting exon 10 are associated with a distinct condition, corroborating a previous hypothesis based on a similar case. Furthermore, this report provides an additional example of a genetic condition presenting with clinical heterogeneity due to alternative transcript processing. In conclusion, POC1A mutations in exon 10 should be taken into account in patients with extreme insulin resistance and short stature.

Original languageEnglish
Pages (from-to)K21-K27
JournalEuropean Journal of Endocrinology
Issue number5
Publication statusPublished - Nov 1 2017

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Endocrinology


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