Coenzyme Q supports distinct developmental processes in Caenorhabditis elegans

Area of Science:

• Biochemistry
• Genetics
• Developmental Biology

Background:

• Coenzyme Q (Q) is vital for cellular energy production and aging.
• Q deficiency is linked to human pathologies.
• The role of Q in C. elegans development and lifespan is not fully understood.

Purpose of the Study:

• To investigate the function of Coenzyme Q (Q) in Caenorhabditis elegans development and lifespan.
• To explore the impact of COQ-8 gene deletion on Q biosynthesis and organismal health.
• To determine the necessity of Q for embryonic development and fertility.

Main Methods:

• Utilized a coq-8 deleted C. elegans strain (coq-8(ok840)) to assess Q levels.
• Quantified endogenous Q(9) content in knockout and wild-type strains.
• Administered exogenous Q and uridine to knockout worms and analyzed developmental and reproductive parameters.
• Observed embryonic development in relation to COQ-8 expression timing.

Main Results:

• coq-8 knockouts exhibited significantly reduced Q(9) levels (approx. 7% of wild-type).
• Knockouts displayed abnormal gonad and hypodermis development, reduced fertility, and shortened lifespan.
• Exogenous Q administration partially rescued these phenotypes.
• Embryonic development arrested at COQ-8 expression onset in knockouts.
• Uridine supplementation improved egg production and progeny in Q-rich conditions.

Conclusions:

• A critical level of Coenzyme Q (Q) is essential for C. elegans embryo development and fertility.
• COQ-8 plays a role in regulating Q biosynthesis rate.
• Extra-mitochondrial functions of Q are crucial for linking development and bioenergetics in C. elegans.