Sensory neuron LKB1 mediates ovarian and reproductive function

Area of Science:

• Neuroscience
• Reproductive Biology
• Metabolism

Background:

• Current treatments for female reproductive disorders, like hormone replacement therapy, present significant health risks.
• Understanding the bidirectional communication between sensory neurons and innervated organs is crucial for novel therapeutic strategies.
• The role of sensory neuron metabolism in reproductive health remains largely unexplored.

Purpose of the Study:

• To investigate the hypothesis that sensory neuron metabolic activity influences reproductive phenotypes.
• To explore the function of liver kinase B1 (LKB1) in regulating sensory neuron metabolism and its impact on female fertility.

Main Methods:

• Utilized a murine model with conditional deletion of LKB1 in sensory neurons (Na_v1.8cre; LKB1^fl/fl).
• Assessed ovarian innervation, follicular turnover, and litter size in genetically modified and control mice.
• Examined the effect of LKB1 genotype in male breeders on fertility outcomes.

Main Results:

• LKB1 deletion in sensory neurons led to reduced ovarian innervation and increased follicular turnover.
• Female mice with LKB1-deficient sensory neurons exhibited significantly higher litter sizes compared to wild-type controls.
• The LKB1 genotype in male breeders did not influence fertility, indicating a female-specific effect.

Conclusions:

• Sensory neuron metabolism, specifically LKB1 expression, plays a critical role in modulating female fertility.
• Altered ovarian sensory innervation due to metabolic changes in neurons impacts reproductive success.
• This research highlights a potential new avenue for treating female reproductive disorders by targeting sensory neuron metabolism.