The RHO-1 RhoGTPase modulates fertility and multiple behaviors in adult C. elegans

Area of Science:

• Molecular Biology
• Developmental Biology
• Genetics

Background:

• Rho GTPases are vital for embryonic development, but their adult functions are less understood.
• Studying Rho signaling in adult organisms presents significant challenges.

Purpose of the Study:

• To investigate the post-developmental functions of Rho signaling in adult Caenorhabditis elegans.
• To characterize the phenotypic consequences of manipulating Rho signaling in adult C. elegans.

Main Methods:

• Utilized inducible transgenes to express a constitutively active RHO-1 or C3 transferase (Rho inhibitor) in adult C. elegans.
• Observed phenotypes related to locomotion, organ function, morphology, and survival.

Main Results:

• Altered RHO-1 signaling in cholinergic neurons impacted locomotion, pharyngeal pumping, and fecundity.
• Changes in RHO-1 signaling outside cholinergic neurons affected defecation, ovulation, and body morphology.
• Both hyperactivation and inhibition of RHO-1 signaling in adults resulted in rapid lethality.

Conclusions:

• RhoA signaling pathways are essential for multiple post-developmental processes in adult C. elegans.
• The observed phenotypes offer a platform for genetic screens to further elucidate these pathways.