• PMID: 21556890
• Gene Name: HMOX1
• Condition: Male infertility
• Association: This study shows for the first time that GT-repeats expansion in promoter of the HO-1 gene is associated with oligospermia and azoospermia among Iranian infertile cases.
• Mutation: GT-repeats alleles in the promoter of HO-
• Population size: 200
• Population details: 200 (100 cases, 100 normal controls)
• Sex: Male
• Infertility type: Male infertility
• Other associated phenotypes: Male infertility

Study of GT-repeat expansion in Heme oxygenase-1 gene promoter as genetic cause of male infertility

Siasi E, Aleyasin A, Mowla SJ, Sahebkashaf H.

PURPOSE: The length of GT-repeats polymorphic region in the promoter of human Heme oxygenase-1 gene (HO-1) alters the level of its transcriptional activity in response to oxidative stresses. Decreased level of HO-1 protein in the seminal plasma has been reported to be associated with oligospermia and azoospermia in male infertility. This is the first study to investigate the association between GT-repeats expansion in the promoter of the HO-1 gene and male infertility. METHODS: The frequencies of different GT-repeats alleles in the promoter of HO-1 gene were determined in 100 cases and 100 normal controls using PCR-PAGE, ABI fragment analysis genotyping and sequencing analysis. RESULTS: All alleles were classified into S and L alleles. S alleles were specified as number 0 to 3 with <27 GT-repeats and L alleles were specified as number 4 to 6 with >27 repeats. The L allele frequency was significantly higher among case group (54.5%) than that was obtained in the normal control group (37.5%). Statistical analysis provided a significant relationship between L allele and male infertility (P < 0.001). CONCLUSIONS: This study shows for the first time that GT-repeats expansion in promoter of the HO-1 gene is associated with oligospermia and azoospermia among Iranian infertile cases. FAU - Siasi, Elham AU - Siasi E AD - Tarbiat Modarres University, Tehran, Iran. emi_biotech2006@yahoo.ca FAU - Aleyasin, Ahmad AU - Aleyasin A FAU - Mowla, Seyed Javad AU - Mowla SJ