PMID- 19328949 OWN - NLM STAT- MEDLINE DCOM- 20090729 LR - 20090330 IS - 0041-1345 (Print) IS - 0041-1345 (Linking) VI - 41 IP - 2 DP - 2009 Mar TI - Mannose binding lectin (+54) exon 1 gene polymorphism in Tunisian kidney transplant patients. PG - 660-2 LID - 10.1016/j.transproceed.2009.01.030 [doi] AB - Mannose-binding lectin (MBL), a collagen-like serum protein, is a key component of innate immunity. MBL binding to carbohydrates present on pathogens mediates lectin-dependent activation of the complement pathway. There is growing interest in the importance of innate immunity in host defense, particularly when adaptive immunity is compromised. Three single nucleotide polymorphisms (SNPs) of the MBL gene have been described in the first exon to be associated with low MBL serum concentrations as well as impaired MBL structure and function. Clinical studies have shown that these MBL SNPs are associated with increased susceptibility to infections, especially in immunocompromised patients. To investigate the association between acute kidney transplant rejection and polymorphism at codon 54 of the MBL gene, the DNA genomic of 133 renal transplant recipients and 117 healthy blood donors was analyzed by restriction fragment length polymorphism-polymerase chain reaction. The patients were classified into two groups: group 1 included 32 HLA-identical recipients and group 2, 101 one haplo-identical recipients. Forty-eight (36.1%) subjects had developed one or more acute rejection episodes (AREs) within the first 6 months after transplantation: 9 in group 1 (28.12%) and 39 in group 2 (38.61%). The genotype and allele frequencies of (+54) MBL gene polymorphism among patients and controls did not reveal a significant difference. However, the frequency of MBL-B mutant allele was increased among patients with AREs compared with those without AREs: group 1 (0.167 vs 0.065) versus group 2 (0.205 vs 0.105). Although the difference was not significant, perhaps because of the small number of patients, the MBL at codon (+54) polymorphism could be involved in the susceptibility of Tunisian kidney transplant recipients to acute allograft rejection episodes. FAU - Gorgi, Y AU - Gorgi Y AD - Immunology Laboratory, Charles Nicolle Hospital, Tunis, Tunisia. yousr_gorgi@yahoo.fr FAU - Sfar, I AU - Sfar I FAU - Aouadi, H AU - Aouadi H FAU - Makhlouf, M AU - Makhlouf M FAU - Abderrahim, E AU - Abderrahim E FAU - Jendoubiayed, S AU - Jendoubiayed S FAU - Bardi, R AU - Bardi R FAU - Ben Abdallah, T AU - Ben Abdallah T FAU - Ayed, K AU - Ayed K LA - eng PT - Journal Article PL - United States TA - Transplant Proc JT - Transplantation proceedings JID - 0243532 RN - 0 (Codon) RN - 0 (HLA Antigens) RN - 0 (Mannose-Binding Lectin) RN - 9007-49-2 (DNA) SB - IM MH - Adult MH - Blood Donors MH - Codon/genetics MH - DNA/blood/genetics/isolation & purification MH - Exons/*genetics MH - Female MH - Gene Frequency MH - Genetic Predisposition to Disease MH - Genotype MH - Graft Rejection/genetics/immunology MH - HLA Antigens/immunology MH - Histocompatibility Testing MH - Humans MH - Kidney Transplantation/immunology/*physiology MH - Male MH - Mannose-Binding Lectin/*genetics MH - *Polymorphism, Genetic MH - Polymorphism, Restriction Fragment Length MH - *Polymorphism, Single Nucleotide MH - Tunisia MH - Young Adult EDAT- 2009/03/31 09:00 MHDA- 2009/07/30 09:00 CRDT- 2009/03/31 09:00 PHST- 2009/03/31 09:00 [entrez] PHST- 2009/03/31 09:00 [pubmed] PHST- 2009/07/30 09:00 [medline] AID - S0041-1345(09)00032-3 [pii] AID - 10.1016/j.transproceed.2009.01.030 [doi] PST - ppublish SO - Transplant Proc. 2009 Mar;41(2):660-2. doi: 10.1016/j.transproceed.2009.01.030.