Journal
JOURNAL OF CLINICAL IMMUNOLOGY
Volume 31, Issue 2, Pages 265-271Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10875-010-9480-8
Keywords
Human; immunodeficiency diseases; transcription factors; signal transduction; nontuberculous mycobacteria; MSMD; STAT1
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Partial defects in interferon (IFN)-gamma signaling lead to susceptibility to infections with nontuberculous mycobacteria. The receptors for IFN-alpha and IFN-gamma activate components of the Janus kinase-signal transducer and activator of transcription (STAT) signaling pathway. Some defects in STAT1 mainly affect IFN-gamma signaling, thus resulting in mendelian susceptibility to mycobacterial disease (MSMD). MSMD is a severe disease but patients show a favorable response to anti-mycobacterial chemotherapy. Other defects in STAT1 affect both IFN-alpha and IFN-gamma signaling resulting in mycobacterial and lethal viral disease. We report here a patient with two novel STAT1 alleles, which in combination results in a recessive trait with partial STAT1 deficiency and mycobacterial disease. Cells from the patient did respond to mycobacterial antigen, but both the expression of STAT1 and phosphorylation of STAT1 in response to IFN-gamma treatment were reduced. This is the first report of a mutation in the N-terminal part of STAT1 involved in causing mycobacterial disease.
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