期刊
SCIENCE TRANSLATIONAL MEDICINE
卷 13, 期 582, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/scitranslmed.abb0036
关键词
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资金
- Helse Sor-Ost
- K.G. Jebsen Inflammation Research Centre (JIRC)
- Norwegian PSC research center
- Knut and Alice Wallenberg Foundation
- Novo Nordisk Foundation
- Swedish Research Council
- Swedish Cancer Society
- Swedish Foundation for Strategic Research
- Swedish Society for Medical Research
- Cancer Research Foundations of Radiumhemmet
- Center for Innovative Medicine, Region Stockholm
- Karolinska Institutet
A heterozygous germline missense mutation in the CD100 gene was found in a family with PSC, leading to T cell functional defects and increased proliferation as well as impaired interferon-gamma production. Mice with homologous mutation showed a higher susceptibility to develop severe cholangitis, which could be attenuated by transferring wild-type T cells. The study suggests a potential therapeutic role for T cells in protecting against PSC.
Primary sclerosing cholangitis (PSC) is a chronic inflammatory liver disease without clear etiology or effective treatment. Genetic factors contribute to PSC pathogenesis, but so far, no causative mutation has been found. We performed whole-exome sequencing in a family with autosomal dominant inheritance of PSC and identified a heterozygous germline missense mutation in SEMA4D, encoding a K849T variant of CD100. The mutation was located in an evolutionarily conserved, unstructured cytosolic region of CD100 affecting downstream signaling. It was found to alter the function of CD100-expressing cells with a bias toward the T cell compartment that caused increased proliferation and impaired interferon-gamma (IFN-gamma) production after stimulation. Homologous mutation knock-in mice developed similar IFN-gamma impairment in T cells and were more prone to develop severe cholangitis when exposed to 3,5-diethoxycarbonyl-1,4-dihydrocollidine (DDC) diet. Transfer of wild-type T cells to knock-in mice before and during DDC exposure attenuated cholangitis. Taken together, we identified an inherited mutation in the disordered cytosolic region of CD100 resulting in T cell functional defects. Our findings suggest a protective role for T cells in PSC that might be used therapeutically.
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