Dataset Information
A novel splicing variant in DNAH8 causes asthenozoospermia.
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ABSTRACT: Purpose
To identify the genetic factors responsible for asthenozoospermia, which is a major cause of male infertility characterized by immotile and malformed spermatozoa.Methods
Whole-exome sequencing was performed in two brothers from a family with asthenozoospermia to identify pathogenic variants. The functional effect of the identified variant was investigated in HEK293T cells using a minigene assay.Results
We identified a novel homozygous splicing variant c.6311-2A>G in DNAH8 from two affected brothers belonging to the same consanguineous family. The splicing variant altered a consensus splice acceptor site of DNAH8 intron 44, which led to the deletion of exon 45 and resulted in a frameshift and a predicted truncated protein (p.G2104Efs*19). Although most spermatozoa from the patients presented with reduced sperm motility, intracytoplasmic sperm injection was able to overcome the inability of the spermatozoa to reach the ovum and thus produce a healthy child for the proband.Conclusions
This finding expands the mutational spectrum of DNAH8, making it a potential genetic diagnostic marker for those suffering from primary male infertility.
SUBMITTER: Zhou Z
PROVIDER: S-EPMC8266938 | biostudies-literature | 2021 Jun
REPOSITORIES: biostudies-literature
Publications
A novel splicing variant in DNAH8 causes asthenozoospermia.
Journal of assisted reproduction and genetics 20210220 6
<h4>Purpose</h4>To identify the genetic factors responsible for asthenozoospermia, which is a major cause of male infertility characterized by immotile and malformed spermatozoa.<h4>Methods</h4>Whole-exome sequencing was performed in two brothers from a family with asthenozoospermia to identify pathogenic variants. The functional effect of the identified variant was investigated in HEK293T cells using a minigene assay.<h4>Results</h4>We identified a novel homozygous splicing variant c.6311-2A>G ...[more]