Molecular genetic analysis of microdeletion on AZF/DAZ gene in patients with idiopathic azoospermia and severe oligozoospermia in Fujian

摘要

Objective: To identify microdeletions in azoospermia factor(AZF) gene loci in patients with idiopathic azoospermia and severe oligozoospermia in Fujian. Methods: Molecular genetic detection method was used to detect microdeletion at the AZFa, AZFb, AZFc /DAZ,SRY region of Y chromosome in 47 azoospermia and 4 severe oligozoospermia patients. Genomic DNA was extracted from peripheral blood. The sequence tagged site (STS) primers tested in each cases were sY84(AZFa), sY 143(AZFb) sY254(AZFc).SRY region of Y chromosome for control. The PCR products were analyzed on a 2.0% agarose gel. Results: Microdeletions of the Y-chromosomal AZF loci were revealed in 18(35.3%,18/51) of 51 patients with idiopathic azoospermia and severe oligozoospermia. AZFa deletion was found in four (7.8%) patients, AZF b in five (9.8%) patients, AZF c in four (7.8%) patients. AZF a+b in one(1.9%)patient, AZF b+c in two (3.9%) patients, AZF a+b+c in two (3.9%)patients respectively. No deletion of SRY region was found. No deletion of AZF a, AZF b, AZF c/DAZ,SRY regions was found in five fertile male who had at least one or more children. Conclusions: Microdeletions on AZF/DAZ gene loci were major genetics defects leading to azoospermia and severe oligozoospermia in male idiopathic infertility in Fujian. It is necessary to have genetic counseling and carry out microdeletion detection on AZF/DAZ gene loci before performing intracytoplasmic sperm injection (ICSI).