TY - JOUR
T1 - Pyoderma gangrenosum, acne and ulcerative colitis in a patient with a novel mutation in the PSTPIP1 gene
AU - Zeeli, T.
AU - Padalon-Brauch, G.
AU - Ellenbogen, E.
AU - Gat, A.
AU - Sarig, O.
AU - Sprecher, E.
N1 - Publisher Copyright:
© 2015 British Association of Dermatologists.
PY - 2015/6/1
Y1 - 2015/6/1
N2 - Background Pyogenic sterile arthritis, pyoderma gangrenosum and acne (PAPA) syndrome is a rare hereditary, autosomal dominant, auto-inflammatory disease caused by mutations in the PSTPIP1 gene, which encodes proline-serine-threonine phosphatase interacting protein 1. The fact that PSTPIP1 is involved in immune regulation provides a rationale for treatment of this rare disease with interleukin (IL)-1 signalling blocking agents. Aim We investigated a 33-year-old man with a long-standing history of ulcerative colitis, severe acne and recurrent skin ulcerations, and a 3-year history of a recalcitrant pustular rash. Methods We used direct sequencing to search for mutations in the PSTPIP1 gene. Results Examination of biopsies obtained from pustules and skin ulcers revealed folliculitis and ulceration with a diffuse neutrophilic dermal infiltrate, consistent with a diagnosis of pyoderma gangrenosum. Because of the known association of acne and pyoderma gangrenosum in PAPA syndrome, we determined the entire coding sequence of the PSTPIP1 gene, and identified a hitherto unreported heterozygous mutation predicted to alter a highly conserved residue (p.G403R) and to be damaging to the protein function. Based on this finding, we initiated treatment with a human IL-1 receptor antagonist, anakinra, which led to a dramatic improvement in the patient's condition. Conclusions We describe a novel mutation in PSTPIP1 resulting in pyoderma gangrenosum, acne and ulcerative colitis. This novel constellation of clinical manifestations, which we term 'PAC syndrome', suggests the need to regroup all PSTPIP1-associated phenotypes under one aetiological group.
AB - Background Pyogenic sterile arthritis, pyoderma gangrenosum and acne (PAPA) syndrome is a rare hereditary, autosomal dominant, auto-inflammatory disease caused by mutations in the PSTPIP1 gene, which encodes proline-serine-threonine phosphatase interacting protein 1. The fact that PSTPIP1 is involved in immune regulation provides a rationale for treatment of this rare disease with interleukin (IL)-1 signalling blocking agents. Aim We investigated a 33-year-old man with a long-standing history of ulcerative colitis, severe acne and recurrent skin ulcerations, and a 3-year history of a recalcitrant pustular rash. Methods We used direct sequencing to search for mutations in the PSTPIP1 gene. Results Examination of biopsies obtained from pustules and skin ulcers revealed folliculitis and ulceration with a diffuse neutrophilic dermal infiltrate, consistent with a diagnosis of pyoderma gangrenosum. Because of the known association of acne and pyoderma gangrenosum in PAPA syndrome, we determined the entire coding sequence of the PSTPIP1 gene, and identified a hitherto unreported heterozygous mutation predicted to alter a highly conserved residue (p.G403R) and to be damaging to the protein function. Based on this finding, we initiated treatment with a human IL-1 receptor antagonist, anakinra, which led to a dramatic improvement in the patient's condition. Conclusions We describe a novel mutation in PSTPIP1 resulting in pyoderma gangrenosum, acne and ulcerative colitis. This novel constellation of clinical manifestations, which we term 'PAC syndrome', suggests the need to regroup all PSTPIP1-associated phenotypes under one aetiological group.
UR - http://www.scopus.com/inward/record.url?scp=84929297224&partnerID=8YFLogxK
U2 - 10.1111/ced.12585
DO - 10.1111/ced.12585
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C2 - 25683018
AN - SCOPUS:84929297224
SN - 0307-6938
VL - 40
SP - 367
EP - 372
JO - Clinical and Experimental Dermatology
JF - Clinical and Experimental Dermatology
IS - 4
ER -