[Show abstract][Hide abstract] ABSTRACT: Genetic factors including Y chromosome microdeletions and androgen receptor (AR) gene mutations are responsible for male infertility. In the present study, genetic analysis was performed in an infertile Iranian male with azoospermia. Multiplex polymerase chain reaction with 6 sequence-tagged site markers on the Yq11 chromosome revealed no microdeletions in the Y chromosome. Single-strand conformational polymorphism and sequencing analyses detected a 1510C→A transversion in exon 1 of the AR gene, which resulted in a p.Pro504Thr substitution in the transactivation domain of the protein. The present study suggested that mutations in the AR gene might be responsible for some cases of idiopathic infertility, and therefore, molecular analyses may be useful for genetic counseling of candidates with regard to the use of assisted reproductive techniques.
Full-text · Article · Dec 2010 · Journal of Andrology
[Show abstract][Hide abstract] ABSTRACT: Genetic factors contribute about 10 per cent of male infertility. Among these, genes in azoospermia factor (AZF) region including AZFa, AZFb, AZFc and AZFd on the long arm of Y chromosome are considered most important for spermatogenesis. Deletions in these regions are thought to be involved in some cases of male infertility associated with azoospermia or oligozoospermia. We studied the incidence of AZF deletions among Iranian infertile men with idiopathic non-obstructive azoospermia.
A total of 100 Iranian azoospermic infertile men were selected for the molecular study of Y chromosome microdeletions. The presence of 13 sequence tagged site (STS) markers from AZF region was investigated using multiplex polymerase chain reaction (M-PCR). One hundred fertile men were also studied as control group.
Twelve (12%) patients showed Y chromosome microdeletions and among these, deletion in AZFb region was the most frequent (66.67%) followed by AZFc (41.67%), AZFd (33.33%) and AZFa (8.33%), respectively.
Because of relatively high incidence of Y chromosome microdeletions among Iranian azoospermic patients, molecular screening may be advised to infertile men before using assisted reproductive treatments.
Full-text · Article · Sep 2010 · The Indian Journal of Medical Research
[Show abstract][Hide abstract] ABSTRACT: 1. Alzheimer’s disease (AD) is the most common form of dementia in the elderly in which interplay between genes and the environment is supposed to be involved. Mitochondrial DNA (mtDNA) has the only noncoding regions at the displacement loop (D-loop) region that contains two hypervariable segments (HVS-I and HVS-II) with high polymorphism. mtDNA has already been fully sequenced and many subsequent publications have shown polymorphic sites, haplogroups, and haplotypes. Haplogroups could have important implications to understand the association between mutability of the mitochondrial genome and the disease.
2. To assess the relationship between mtDNA haplogroup and AD, we sequenced the mtDNA HVS-I in 30 AD patients and 100 control subjects. We could find that haplogroups H and U are significantly more abundant in AD patients (P = 0.016 for haplogroup H and P = 0.0003 for haplogroup U), Thus, these two haplogroups might act synergistically to increase the penetrance of AD disease.
No preview · Article · Jun 2007 · Cellular and Molecular Neurobiology
[Show abstract][Hide abstract] ABSTRACT: Classical galactosemia (McKusick 230400) is an autosomal recessive disorder caused by mutations in the galactose-1-phosphate uridyl transferase (GALT;EC 184.108.40.206) gene.
In the present study, we report molecular analysis of 14 unrelated Iranian galactosemia children with reduced or without GALT activity using PCR-RFLP and SSCP-Sequencing methods.
Q188R mutation was the most observed mutation with the allelic frequency of 57.1%. The allelic frequencies for S135L, Y209S, A320T, and K285N were found to be 7.1%, 7.1%, 7.1%, and 3.57% respectively.
Our results show that galactosemia is a heterogeneous disorder at the molecular level among the Iranian population.
No preview · Article · Aug 2006 · Clinical Biochemistry
[Show abstract][Hide abstract] ABSTRACT: Thirty-seven unrelated Iranian CF families were screened for the presence of seven common mutations (DeltaF508, G542X, W1282X, G551D, N1303K, 1717-1G-->A, and 621-1G-->T) using ARMS PCR and exons 4 and 7 of the CFTR gene by SSCP method. This study resulted in the identification of 26.8 per cent of all CF alleles: DeltaF508 (16.2 per cent), W1282X (4 per cent), G542X (2.7 per cent), R117H (1.3 per cent), R347H (1.3 per cent), and A120T (1.3 per cent) mutations were detected. To the best of our knowledge, it is the first report of an Asian subject carrying the A120T mutation. Our findings suggest heterogeneity in the Iranian population, stressing the need to draw attention to sequence analysis in order to find population-specific mutations.
No preview · Article · Dec 2004 · Journal of Tropical Pediatrics