Novel RHOXF1 mutation causes male infertility by inducing severe oligoasthenozoospermia

Area of Science:

• Human Genetics
• Reproductive Biology
• Endocrinology

Background:

• Oligoasthenozoospermia (OAT) is a significant cause of male infertility.
• Genetic defects are frequently identified as the underlying cause of OAT.
• Understanding the genetic basis of OAT is crucial for diagnosis and treatment.

Purpose of the Study:

• To identify the genetic cause of severe OAT in a patient and his family.
• To investigate the functional consequences of the identified genetic mutation.
• To establish a novel genetic cause for OAT in human males.

Main Methods:

• Recruitment of a severe OAT patient and family for genetic analysis.
• Identification of a heterozygous RHOXF1 mutation (c.412 G>A p.Glu138Lys) through sequencing.
• Analysis of hormonal levels including testosterone and luteinizing hormone (LH).

Main Results:

• A heterozygous RHOXF1 mutation (c.412 G>A p.Glu138Lys) was identified in the affected individuals, inherited from their mother.
• The RHOXF1 mutation led to reduced testosterone secretion and elevated LH levels.
• The mutation resulted in disrupted sex hormone secretion and impaired sperm production, causing severe OAT.

Conclusions:

• This study reports the RHOXF1 gene mutation (c.412 G>A p.Glu138Lys) as a cause of severe OAT in human males.
• This finding expands the known spectrum of genetic defects linked to male infertility.
• The identification facilitates improved genetic screening and clinical diagnosis for OAT.