Human Y chromosome microdeletion analysis by PCR multiplex protocols identifying only clinically relevant AZF...

Area of Science:

• Genetics
• Reproductive Biology
• Molecular Diagnostics

Background:

• Y chromosome microdeletions, particularly in Azoospermia Factor (AZF) regions, are a significant cause of male infertility.
• These deletions disrupt Y genes crucial for spermatogenesis, leading to distinct testicular pathologies.
• Current methods may not differentiate between deletions with and without clinical relevance.

Purpose of the Study:

• To develop a targeted multiplex PCR assay for identifying clinically relevant AZF microdeletions.
• To specifically detect deletions associated with male infertility and specific testicular pathologies.
• To improve diagnostic accuracy for male infertility by focusing on functionally significant gene deletions.

Main Methods:

• Utilized multiplex PCR assays targeting Sequence Tagged Site (STS) deletion markers within expressed Y genes in AZFa, AZFb, and AZFc regions.
• Integrated quality control measures following European Molecular Genetics Quality Network (EMQN) guidelines.
• Developed an additional assay to analyze AZF breakpoint borderlines for complete AZF region deletions.

Main Results:

• The proposed assay effectively identifies specific AZF microdeletions relevant to male infertility and testicular pathology.
• Distinguishes between complete and partial AZF deletions, including those with and without clinical impact.
• The assay provides reliable diagnosis comparable to classical AZF microdeletion detection.

Conclusions:

• A targeted multiplex PCR assay offers a clinically relevant approach to diagnosing male infertility caused by Y chromosome microdeletions.
• This method enhances diagnostic precision by focusing on deletions with known pathological consequences.
• The assay adheres to strict quality control standards for reliable molecular diagnostics.