Biallelic RIPK1 mutations in humans cause severe immunodeficiency, arthritis, and intestinal inflammation

We report four patients from three unrelated families with complete RIPK1 deficiency caused by rare homozygous mutations. The patients suffered from recurrent infections, early-onset inflammatory bowel disease, and progressive polyarthritis. They had immunodeficiency with lymphopenia and altered production of various cytokines revealed by whole-blood assays. In vitro, RIPK1-deficient cells showed impaired mitogen-activated protein kinase activation and cytokine secretion and were prone to necroptosis. Hematopoietic stem cell transplantation reversed cytokine production defects and resolved clinical symptoms in one patient. Thus, RIPK1 plays a critical role in the human immune system.

Source: ScienceNOW - August 23, 2018 Category: Science Authors: Cuchet-Lourenco, D., Eletto, D., Wu, C., Plagnol, V., Papapietro, O., Curtis, J., Ceron-Gutierrez, L., Bacon, C. M., Hackett, S., Alsaleem, B., Maes, M., Gaspar, M., Alisaac, A., Goss, E., AlIdrissi, E., Siegmund, D., Wajant, H., Kumararatne, D., AlZahran Tags: Medicine, Diseases reports Source Type: news