PMID- 23266622 OWN - NLM STAT- MEDLINE DCOM- 20130325 LR - 20130204 IS - 1879-0038 (Electronic) IS - 0378-1119 (Linking) VI - 516 IP - 1 DP - 2013 Mar 1 TI - KIR genes and HLA class I ligands in Gaucher disease. PG - 53-7 LID - S0378-1119(12)01520-X [pii] LID - 10.1016/j.gene.2012.12.014 [doi] AB - Gaucher disease (GD) is caused by reduced activity of the lysosomal enzyme glucocerebrosidase, which leads to a buildup of glucocerebroside within the cells and chronic stimulation of the immune system. GD is associated with clinical variability even in the same family, which suggests the influence of modifier genes. Natural killer (NK) cells play an important role in the immune response, and their number is decreased in GD. Killer-cell immunoglobulin-like receptors (KIR) regulate the activity of NK cells through an interaction with specific human leukocyte antigen (HLA) class I molecules on target cells. OBJECTIVES: To analyze the variability of KIR genes in a sample of GD patients from Southern Brazil, and look for associations between variants and clinical manifestations. METHODOLOGY: Thirty-one GD patients (24 mild, 4 moderate, and 3 severe) were included in the study. Fifteen KIR genes, HLA-C and HLA-Bw4 were analyzed using SSP-PCR. Clinical, biochemical, and radiological data were collected by means of a chart review. RESULTS/DISCUSSION: Age at symptom onset was associated with KIR2DL2 and KIR2DS2 in combination with the ligand HLA-C1 (p=0.038). Patients who have the HLA-C2 variant appear to have more mono- and polyclonal bands on protein electrophoresis (p=0.007, OR 21.3). There was no between-group significant difference in the frequencies of KIR/HLA variants. CONCLUSION: Although exploratory our data suggest a possible association of KIR/HLA variants and the severity of GD. Further study of KIR/HLA variants is required, as they seem to be a phenotype-modifying factor in this disease. CI - Copyright (c) 2012 Elsevier B.V. All rights reserved. FAU - Vairo, Filippo AU - Vairo F AD - Medical Genetics Service, Hospital de Clinicas de Porto Alegre, Brazil. fvairo@hcpa.ufrgs.br FAU - Portela, Pamela AU - Portela P FAU - Salim, Patricia H AU - Salim PH FAU - Jobim, Mariana AU - Jobim M FAU - Netto, Cristina AU - Netto C FAU - Dorneles, Alicia AU - Dorneles A FAU - Mittlestadt, Suzana AU - Mittlestadt S FAU - Jobim, Luiz Fernando AU - Jobim LF FAU - Schwartz, Ida Vanessa D AU - Schwartz IV LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20121221 PL - Netherlands TA - Gene JT - Gene JID - 7706761 RN - 0 (HLA-B Antigens) RN - 0 (HLA-Bw4 antigen) RN - 0 (Histocompatibility Antigens Class I) RN - 0 (Ligands) RN - 0 (Receptors, KIR) SB - IM MH - Adolescent MH - Adult MH - Brazil MH - Female MH - Gaucher Disease/*genetics/immunology MH - Gene Frequency MH - Genes, MHC Class I/*genetics MH - Genetic Variation MH - Genotype MH - HLA-B Antigens/genetics/immunology MH - Histocompatibility Antigens Class I/*genetics/immunology MH - Humans MH - Killer Cells, Natural/metabolism MH - Ligands MH - Male MH - Phenotype MH - Receptors, KIR/*genetics/metabolism MH - Young Adult EDAT- 2012/12/26 06:00 MHDA- 2013/03/26 06:00 CRDT- 2012/12/26 06:00 PHST- 2012/06/28 00:00 [received] PHST- 2012/12/07 00:00 [revised] PHST- 2012/12/10 00:00 [accepted] PHST- 2012/12/26 06:00 [entrez] PHST- 2012/12/26 06:00 [pubmed] PHST- 2013/03/26 06:00 [medline] AID - S0378-1119(12)01520-X [pii] AID - 10.1016/j.gene.2012.12.014 [doi] PST - ppublish SO - Gene. 2013 Mar 1;516(1):53-7. doi: 10.1016/j.gene.2012.12.014. Epub 2012 Dec 21.