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Updated: Apr 9, 2026
Experimental Protocol for Using Drosophila As an Invertebrate Model System for Toxicity Testing in the Laboratory
Published on: July 10, 2018
Potassium sorbate induces developmental and microbiome changes in Drosophila melanogaster with attenuated
Yuling Dong1, Beibei Du2, Changjian Xie1
1School of Life Sciences and Medicine, Institute of Anti-aging and Regenerative Medicine Research, Shandong University of Technology, Zibo, Shandong, China.
Insights
Potassium sorbate (PS) exposure during development can impact growth and lifespan in fruit flies. High doses caused developmental delays and gut microbiome changes that persisted across generations.
Area of Science:
- Developmental Biology
- Toxicology
- Microbiology
Background:
- Potassium sorbate (PS) is a common preservative with unknown effects on early development and gut microbiota.
- Early life stages are vulnerable to chemical exposures, with potential long-term consequences.
- Trans-generational effects of PS exposure are not well understood.
Purpose of the Study:
- To investigate the effects of potassium sorbate (PS) on fruit fly development, gut microbiota, and gene regulation.
- To assess the trans-generational impact of PS exposure during a critical developmental window.
- To elucidate the mechanisms underlying PS toxicity.
Main Methods:
- Utilized *Drosophila melanogaster* as a model organism to study conserved developmental and host-microbiota interactions.
- Evaluated PS toxicity across various doses on developmental timing, adult lifespan, and gut microbiota composition.
- Analyzed gene expression changes in key developmental pathways and assessed trans-generational effects in offspring.
Main Results:
- Observed a dose-dependent biphasic effect of PS: low doses accelerated development, while high doses (≥500 mg/L) delayed development and reduced lifespan.
- Trans-generational analysis revealed persistent developmental delays in F1 offspring exposed to high-dose PS.
- High-dose PS disrupted endocrine signaling and altered developmental gene expression, with partial reversibility in offspring.
- Gut microbiota remained stable in exposed parents but showed significant alterations in offspring, indicating trans-generational dysbiosis.
Conclusions:
- Potassium sorbate exposure during development can perturb conserved biological processes across generations.
- Early-life PS exposure can lead to developmental delays and gut microbiome dysbiosis with trans-generational effects.
- Findings in *Drosophila* provide insights into potential risks of early-life chemical exposures in higher organisms.
Abstract:
Potassium sorbate (PS) is a widely used antimicrobial additive employed as a preservative in food, cosmetics, and animal feed. Early childhood represents a critical developmental window characterized by rapid growth, immune system maturation, gut microbiota establishment, and physiological homeostasis development, which may be particularly vulnerable to chemical exposures (during which chemical exposures may exert heightened impacts). Nevertheless, the effects of PS on childhood development and gut microbiota remain poorly understood, and its potential trans-generational effects have yet to be elucidated. In this study, we employed Drosophila melanogaster, an established model for studying evolutionarily conserved aspects of development, metabolism, and host-microbiota interactions, to systematically evaluate PS toxicity across multiple parameters: developmental dynamics, gut microbiota composition, gene regulation in adulthood, and trans-generational effects. Our findings demonstrate a dose-dependent biphasic response: while low-dose PS exposure (25 mg/L) accelerated larval pupation and adult emergence, suggesting a potential growth-promoting effect, high-dose exposure (≥ 500 mg/L) significantly delayed development and reduced adult lifespan (observed in females at 1,000 and males at 500-1,000 mg/L). Notably, trans-generational analysis revealed persistent developmental delays in the F1 generation, with offspring of 1,000 mg/L-exposed parents showing prolonged larval pupation time despite normal adult emergence timelines, indicative of partial developmental recovery. Mechanistically, high-dose PS disrupted endocrine signaling and altered expression of key developmental pathway regulators (EcR, InR, TOR, and E74B). These transcriptional changes were largely reversible in offspring, further supporting a similar gradually wash out recovery. While gut microbiota remained stable in exposed parents, offspring of 1,000 mg/L-exposed flies had significant microbiome alterations, highlighting clear trans-generational dysbiosis. This study provides new evidence that PS exposure during a sensitive developmental period in D. melanogaster can perturb development and gut microbial homeostasis across generations, offering insights relevant to understanding how early-life chemical exposures might influence conserved biological processes in higher organisms.
