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  • Title: [Autoimmune lymphoproliferative syndrome: an inherited or a somatic defect of apoptosis].
    Author: Rieux-Laucat F.
    Journal: Med Sci (Paris); 2006; 22(6-7):645-50. PubMed ID: 16828042.
    Abstract:
    Control of lymphocyte homeostasis is essential to ensure efficient immune responses and to prevent autoimmunity. Expansion followed by contraction of the lymphocyte pool are the basis of adaptive immune responses, and apoptosis is a crucial cellular modus operandi of the contraction phase. The death receptor Fas is a key player in lymphocyte apoptosis induction and patients lacking a functional Fas receptor develop a chronic lymphoproliferation termed autoimmune lymphoproliferative syndrome (ALPS). In rare instances, defects of the Fas signaling pathway have been associated with the ALPS condition. Although these defects with familial history are usually caused by inherited mutations of the corresponding genes, somatic mosaicism of these Fas mutations were also found in sporadic cases of ALPS. These findings might have important implications in deciphering the pathophysiological bases of other autoimmune diseases.
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