Impaired B-Cell Differentiation in a Patient With STAT1 Gain-of-Function Mutation

Hypogammaglobulinemia is a rare complication of STAT1 gain-of-function (GOF) mutations. We report an adult patient diagnosed with hypogammaglobulinemia caused by B-cell depletion during the treatment of disseminated cryptococcosis. The patient carried the STAT1 GOF mutation (c.820C>T, p.R274W). T...

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Detalles Bibliográficos
Autores principales: Nemoto, Kazuki, Kawanami, Toshinori, Hoshina, Takayuki, Ishimura, Masataka, Yamasaki, Kei, Okada, Satoshi, Kanegane, Hirokazu, Yatera, Kazuhiro, Kusuhara, Koichi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2020
Materias:
Immunology
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7550620/
https://www.ncbi.nlm.nih.gov/pubmed/33133069
http://dx.doi.org/10.3389/fimmu.2020.557521
Descripción
Sumario:Hypogammaglobulinemia is a rare complication of STAT1 gain-of-function (GOF) mutations. We report an adult patient diagnosed with hypogammaglobulinemia caused by B-cell depletion during the treatment of disseminated cryptococcosis. The patient carried the STAT1 GOF mutation (c.820C>T, p.R274W). The flow cytometric analysis of his bone marrow revealed that B-cell differentiation was blocked in the stages between pre-B1b and pre-B2 cells. On the other hand, his brother who carried the same mutation displayed normal B-cell counts, thereby indicating that the unrecognized variants in same or other gene might be associated with abnormal B-cell differentiation in the patients. In conclusion, impaired B-cell differentiation in the bone marrow can cause hypogammaglobulinemia in patients with STAT1 GOF mutations.

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