Genetic Study of IL6, GDF5 and PAPPA2 in Association with Developmental Dysplasia of the Hip.

Background: Developmental dysplasia of the hip (DDH) is one of the most prevalent skeletal disorders. DDH is considered a pathologic condition with polygenic background, but environmental and mechanic factors significantly contribute to its multifactorial etiology. Inheritance consistent with autosomal dominant type has also been observed. Single-nucleotide polymorphisms (SNPs) in various genes mostly related to formation of connective tissue are studied for a possible association with DDH.

Methods: We genotyped three SNPs, rs1800796 located in the promoter region of the gene, rs143383 located in the 5' untranslated region (UTR) of the gene and rs726252 located in the fifth intron of the gene. The study consisted of 45 subjects with DDH and 85 controls from all regions of Slovakia.

Results: Association between DDH occurrence and studied genotypes affected by aforementioned polymorphisms was confirmed in the case of rs143383 in the gene ( = 0.047), where the T allele was over-expressed in the study group. Meanwhile, in the matter of and , we found no association with DDH ( = 0.363 and = 0.478, respectively).

Conclusions: These results suggest that there is an association between DDH and polymorphisms and that the T allele is more frequently presents in patients suffering from DDH.