NDLI: Cytogenetic and molecular analysis of male infertility : Y chromosome deletion during nonobstructive azoospermia and severe oligozoospermia

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Cytogenetic and molecular analysis of male infertility : Y chromosome deletion during nonobstructive azoospermia and severe oligozoospermia

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Cytogenetic and molecular analysis of male infertility : Y chromosome deletion during nonobstructive azoospermia and severe oligozoospermia

Content Provider	Springer Nature Link
Author	Dada, Rima Gupta, N. P. Kucheria, K.
Copyright Year	2006
Abstract	Reduced male fertility and subfertility can be caused by genetic factors that affect both germ cell development, differentiation, and function; in particular, chromosome abnormalities and Yq microdeletions are a possible cause of spermatogenetic impairment in males as shown by their higher frequency in infertile men than in the general male population. Microdeletion of the long arm of the Y chromosome (Yq) are associated with spermatogenic failure and have been used to define three regions on Yq (AZFa, AZFb, and AZFc) that are critical for germ cell development. With the advent of assisted reproductive technology and intracytoplasmic sperm injection, knowledge about the various factors leading to spermatogenic impairment is one of the most important aspects of scientific research. Therefore, this study was designed to identify the frequency of cytogenetic and submicroscopic interstitial deletions in azoospermia factor loci in infertile Indian males. One hundred and eighty males with nonobstructive oligozoospermia and azoospermia were included in this study. Semen analysis was done in each case to determine the spermatogenic status. Individuals were subjected to detailed clinical examination, family history, and endocrinological and cytogenetic study after consent from the patient. Peripheral blood cultures were set up according to standard protocols and 30 G-banded metaphases were analyzed in each case. Numerical and structural chromosomal abnormalities were detected in 40 infertile cases. Fluorescence in situ hybridization analysis was done in some cases to identify the percentage of mosaic cell lines and any cryptic or low-level mosaicism. Polymerase chain reaction microdeletion analysis was done in 140 cytogenetically normal cases. Of the 140 cases, 8 showed deletion of at least one of the sequence-tagged site markers. Review of literature has shown that the overall frequency of microdeletions varies from 1 to 55%. In the present study, the frequency of microdeletion was 5.8%, and deletions were identified in cases with undescended testis and varicocele and cases with bilateral severe testiculopathy.
Starting Page	171
Ending Page	177
Page Count	7
File Format	PDF
ISSN	10859195
Journal	Cell Biochemistry and Biophysics
Volume Number	44
Issue Number	1
e-ISSN	15590283
Language	English
Publisher	Humana Press
Publisher Date	2006-01-01
Publisher Place	Totowa
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biochemistry Pharmacology/Toxicology Biotechnology Cell Biology
Content Type	Text
Resource Type	Article
Subject	Cell Biology Medicine Biochemistry Biophysics

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