Polydatin Beneficial Effects in Zebrafish Larvae Undergoing Multiple Stress Types

Area of Science:

• Biochemistry
• Toxicology
• Pharmacology

Background:

• Polydatin, a polyphenol, exhibits known anti-inflammatory and antioxidant properties.
• Copper homeostasis is crucial for organism health; altered copper levels can cause oxidative stress.

Purpose of the Study:

• To investigate polydatin's efficacy in counteracting stress induced by copper sulfate (CuSO4) exposure and caudal fin amputation in zebrafish larvae.
• To explore polydatin's impact on inflammatory markers and antioxidant responses.

Main Methods:

• Zebrafish larvae were exposed to CuSO4 or underwent caudal fin amputation.
• Polydatin administration was assessed for its effects on stress markers.
• Gene expression (il1b, cxcl8b.1, sod1) and neutrophil migration were analyzed.
• Catalase (CAT) activity was measured.

Main Results:

• Polydatin reduced CuSO4-induced stress by lowering il1b and cxcl8b.1 levels and decreasing neutrophil migration.
• Polydatin also reduced neutrophil presence at the fin cut site.
• The compound upregulated sod1 mRNA expression and enhanced CAT activity, indicating an improved antioxidant response.

Conclusions:

• Polydatin administration modulates stress responses in zebrafish larvae.
• Polydatin is more effective in mitigating existing stress effects than in preventing chemical damage.
• The findings support polydatin's potential as a therapeutic agent against stress-related conditions.