Identification of new breakpoints in AZFb and AZFc

• Type: Article in International Scientific Journal
• Date: 2008

Authors

Costa, P (Author) Other; Goncalves, R (Author) Other; Ferras, C (Author) Other; Fernandes, S (Author) Other; Fernandes, AT (Author) Other; sousa, m (Author) ICBAS; barros, a (Author) FMUP

Journal

Title: Molecular Human Reproduction

Vol. 14

Pages: 251-258

ISSN: 1360-9947

Publisher: Oxford University Press

Indexing

ISI Web of Knowledge - 33 Citations

Scopus - 36 Citations

Other information

Authenticus ID: P-004-0NG

DOI: 10.1093/molehr/gan014

Abstract (EN): Microdeletions in AZFa, AZFb and AZFc regions lead to different patterns of male infertility, from severe oligozoospermia to non-obstructive azoospermia. Intrachromosomal homologous recombination mechanisms were already identified in patients with simultaneous microdeletions in the AZFb and AZFc regions. Ten patients with atypical AZFb and AZFc deletion patterns were studied. The definition of those microdeletions and the fine characterization of the respective breakpoints were performed using sequence tagged sites/single nucleotide variants-PCR and DNA sequencing. Y-chromosome haplogroups were determined to establish a putative association with the patterns obtained. Seven deletion patterns were identified, P5/terminal (30%; 3/10), P5/P1 distal (20%; 2/10), IR4/distal-P2, IR2/proximal-P1, IR4/distal-P1, P4/terminal and complete AZFb/c deletion (10%; 1/10). Breakpoint sequence analysis suggests that only in one patient the P5/P1 distal deletion pattern was due to a homologous recombination mechanism. Sequence alignment of the other deletion patterns suggest that they have resulted from non-homologous recombination mechanisms.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8