About Bioline  All Journals  Testimonials  Membership  News

Indian Journal of Human Genetics
Medknow Publications on behalf of Indian Society of Human Genetics
ISSN: 0971-6866
EISSN: 0971-6866
Vol. 17, No. 2, 2011, pp. 59-64
Bioline Code: hg11015
Full paper language: English
Document type: Research Article
Document available free of charge

Indian Journal of Human Genetics, Vol. 17, No. 2, 2011, pp. 59-64

 en The first report described as an important study: The association of mannose-binding lectin gene 2 polymorphisms in children with down syndrome
Demirhan, Osman; Tastemir, Deniz; Günesacar, Ramazan; Güzel, Ali Irfan. & Alptekin, Davut


Background: Mannose-binding lectin gene 2 (MBL2) plays a very important role in the first line of host immune response in Down syndrome (DS). The importance of MBL2 gene polymorphisms in children with DS is unclear, and no research has addressed MBL2 gene polymorphisms in patients with DS. This is the first report describing an important association between MBL2 gene polymorphisms and infections in children with DS.
Materials and Methods: We compared the frequency of single-nucleotide polymorphisms (SNPs) at two codons of the MBL2 gene in a cross sectional cohort of 166 children with DS and 229 controls. Polymorphisms at codons 54 (GGC→GAC) and 57 (GGA→GAA) in exon 1 of the MBL2 gene were typed by polymerase chain reaction (PCR)-restriction fragment length polymorphism (RFLP) technique using the restriction enzymes BshN1 (derivated from Bacillus sphaericus check for this species in other resources ) and MboII (derivated from Moraxella bovis check for this species in other resources ), respectively.
Results: MBL2 codon 54 GA genotype frequency was found to be lower in patients with DS (22.9%) than those of healthy controls (35.8%), differences were statistically significant (OR = 0.532, 95% CI = 0.339-0.836, P = 0.008). On the other hand, codon 57 polymorphism in the MBL2 gene was detected in none of the DS patients, but only one person in the control group showed codon 57 GA genotype (OR = 1.004, 95% CI = 0.996-1.013, P = 1.000).
Conclusion : Our data provides an evidence for the first time that a homozygote or heterozygote for the variant, MBL2 alleles, is not associated with infections in patients with DS, and do not influence the incidence of infections.

Down syndrome, Mannose-binding lectin gene 2 gene polymorphisms, single-nucleotide polymorphisms

© Copyright 2011 Indian Journal of Human Genetics.
Alternative site location:

Home Faq Resources Email Bioline
© Bioline International, 1989 - 2024, Site last up-dated on 01-Sep-2022.
Site created and maintained by the Reference Center on Environmental Information, CRIA, Brazil
System hosted by the Google Cloud Platform, GCP, Brazil