Rotenone mediated developmental toxicity in Drosophila melanogaster

Area of Science:

• Toxicology
• Developmental Biology
• Genetics

Background:

• Rotenone (ROT) is a natural pesticide with unclear effects on growth and development.
• Investigating ROT's impact on reproductive systems and larval development is crucial.

Purpose of the Study:

• To investigate the effects of ROT exposure on the reproductive structure and function of female Drosophila melanogaster.
• To assess ROT's impact on the development and behavior of third instar larvae.

Main Methods:

• Exposure of female Drosophila melanogaster and third instar larvae to ROT.
• Analysis of ovarian morphology, gene expression (Osk, Grk, Nos, Bic-d), and kinesin motor protein (KIF-5B) levels.
• Measurement of caspase activities (Caspase 3, 8, & 9) and assessment of apoptosis and larval developmental time.

Main Results:

• ROT exposure caused developmental inhibition and ovarian abnormalities in female fruit flies.
• Observed were disrupted border cell growth, nurse cell misorientation, altered gene expression, reduced KIF-5B, increased caspases, and apoptosis.
• ROT-treated larvae showed behavioral deficits and delayed development.

Conclusions:

• Rotenone exposure induces significant developmental toxicity in Drosophila melanogaster.
• ROT disrupts key reproductive processes and cellular mechanisms, impacting overall development.
• Findings highlight ROT as a potential developmental toxicant, necessitating further investigation.