PMID- 10583959 OWN - NLM STAT- MEDLINE DCOM- 19991216 LR - 20220316 IS - 0036-8075 (Print) IS - 0036-8075 (Linking) VI - 286 IP - 5446 DP - 1999 Dec 3 TI - Perforin gene defects in familial hemophagocytic lymphohistiocytosis. PG - 1957-9 AB - Familial hemophagocytic lymphohistiocytosis (FHL) is a rare, rapidly fatal, autosomal recessive immune disorder characterized by uncontrolled activation of T cells and macrophages and overproduction of inflammatory cytokines. Linkage analyses indicate that FHL is genetically heterogeneous and linked to 9q21.3-22, 10q21-22, or another as yet undefined locus. Sequencing of the coding regions of the perforin gene of eight unrelated 10q21-22-linked FHL patients revealed homozygous nonsense mutations in four patients and missense mutations in the other four patients. Cultured lymphocytes from patients had defective cytotoxic activity, and immunostaining revealed little or no perforin in the granules. Thus, defects in perforin are responsible for 10q21-22-linked FHL. Perforin-based effector systems are, therefore, involved not only in the lysis of abnormal cells but also in the down-regulation of cellular immune activation. FAU - Stepp, S E AU - Stepp SE AD - Department of Pathology and the Graduate Program in Immunology, University of Texas Southwestern Medical School, Dallas, TX 75235, USA. FAU - Dufourcq-Lagelouse, R AU - Dufourcq-Lagelouse R FAU - Le Deist, F AU - Le Deist F FAU - Bhawan, S AU - Bhawan S FAU - Certain, S AU - Certain S FAU - Mathew, P A AU - Mathew PA FAU - Henter, J I AU - Henter JI FAU - Bennett, M AU - Bennett M FAU - Fischer, A AU - Fischer A FAU - de Saint Basile, G AU - de Saint Basile G FAU - Kumar, V AU - Kumar V LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Science JT - Science (New York, N.Y.) JID - 0404511 RN - 0 (Codon, Terminator) RN - 0 (Membrane Glycoproteins) RN - 0 (Pore Forming Cytotoxic Proteins) RN - 126465-35-8 (Perforin) RN - EC 3.4.21.- (GZMB protein, human) RN - EC 3.4.21.- (Granzymes) RN - EC 3.4.21.- (Serine Endopeptidases) SB - IM MH - Antigen-Presenting Cells/immunology MH - Cell Death MH - Cell Line MH - Cells, Cultured MH - Chromosome Mapping MH - Chromosomes, Human, Pair 10/*genetics MH - Codon, Terminator MH - Cytoplasmic Granules/chemistry MH - Cytotoxicity, Immunologic MH - Frameshift Mutation MH - Genetic Linkage MH - Granzymes MH - Heterozygote MH - Histiocytosis, Non-Langerhans-Cell/*genetics/immunology MH - Humans MH - Lymphocyte Activation MH - Membrane Glycoproteins/analysis/*genetics/physiology MH - Mutation, Missense MH - Perforin MH - Point Mutation MH - Pore Forming Cytotoxic Proteins MH - Serine Endopeptidases/analysis MH - T-Lymphocytes, Cytotoxic/chemistry/immunology EDAT- 1999/12/03 00:00 MHDA- 1999/12/03 00:01 CRDT- 1999/12/03 00:00 PHST- 1999/12/03 00:00 [pubmed] PHST- 1999/12/03 00:01 [medline] PHST- 1999/12/03 00:00 [entrez] AID - 8053 [pii] AID - 10.1126/science.286.5446.1957 [doi] PST - ppublish SO - Science. 1999 Dec 3;286(5446):1957-9. doi: 10.1126/science.286.5446.1957.