A Twist between ROS and Sperm-Mediated Intergenerational Epigenetic Inheritance.

Area of Science:

• Reproductive Biology
• Epigenetics
• Molecular Cell Biology

Background:

• Paternal diet can influence offspring health.
• Spermatozoa carry epigenetic information beyond DNA.
• Reactive oxygen species (ROS) play roles in cellular signaling and disease.

Purpose of the Study:

• To investigate the effects of a paternal low-protein diet on testicular germ cells and spermatozoa.
• To identify molecular mechanisms linking paternal diet to intergenerational effects.

Main Methods:

• Analysis of reactive oxygen species (ROS) levels in testicular germ cells.
• Assessment of ATF7 activity and H3K9me2 histone modification.
• Examination of target gene expression, including tRNA loci.
• Investigation of tsRNA biogenesis in spermatozoa.

Main Results:

• A paternal low-protein diet elevates ROS in testicular germ cells.
• Altered ATF7 activity and H3K9me2 abundance were observed on target genes.
• These molecular changes were maintained in spermatozoa.
• Sperm tsRNA biogenesis was regulated by these diet-induced alterations.

Conclusions:

• Paternal low-protein diet induces epigenetic and molecular changes in germ cells.
• These modifications are transmitted via spermatozoa, affecting tsRNA biogenesis.
• The study demonstrates a mechanism for intergenerational transmission of dietary effects.