Y Chromosome Loss and Implications for Oncology

Area of Science:

• Oncology
• Genetics
• Male Health

Background:

• The Y chromosome influences male sex determination and fertility.
• Males have shorter lifespans and higher cancer rates than females, a disparity not fully explained by environmental factors.
• Loss of the Y chromosome (LOY) in blood cells (mosaic LOY) is age-related and associated with reduced lifespan and increased cancer risk.

Purpose of the Study:

• To review the Y chromosome's roles in oncology.
• To explore the link between Y chromosome alterations and male cancer disparities.
• To highlight how Y-encoded genes influence cancer risk and mortality.

Main Methods:

• Review of existing literature on the Y chromosome, male health, and cancer.
• Analysis of data linking mosaic LOY to cancer incidence and mortality.
• Examination of Y-encoded genes, such as lysine-specific demethylase 5 D, and their oncogenic or tumor-suppressive functions.

Main Results:

• Mosaic LOY is a common event in aging males, correlating with increased cancer incidence and mortality.
• Different tumor types show varying frequencies of Y chromosome loss.
• Y-encoded genes have demonstrated causal roles in cancer, acting as oncogenes or tumor suppressors.

Conclusions:

• The Y chromosome plays a significant role in male cancer risk and mortality.
• Understanding Y chromosome biology, including gene functions and loss events, is crucial for explaining sex disparities in cancer.
• The complete human Y chromosome sequence offers a resource for investigating the molecular basis of male cancer disparities.