Journal Article

Mitigation of cadmium toxicity in African catfish using biological Nano chitosan: insights into biochemical, genotoxic, and histopathological effects

Saleh, Hamida M., Samak, Dalia H., Saleh, Nehad A., Khalil, Riad H., Abd-Ellatieff, Hoda A.

2025

Overview

Background Cadmium is a highly toxicant heavy metal that poses serious risks to aquatic organisms, animals, and humans. Recent studies have investigated using biological chitosan nanoparticles (Bio-CHNPs) as a potential solution to alleviate the harmful effects of Cd exposure, particularly in aquaculture. Bio-CHNPs have gained attention for their applications in drug delivery and biomedical research, indicating their potential utility in addressing environmental toxicity. Objective This research aims to explore the effectiveness of Bio-CHNPs in mitigating cadmium chloride (CdCL 2 ) toxicity in African catfish ( Clarias gariepinus). Methods One hundred and twenty (n = 120) catfish were divided into 4 groups; G1 (control); G2, intoxicated with 10% LC 50 of CdCL 2 ; G3 received 3 g/kg of Bio-CNPs; G4, treated with 10% LC 50 of CdCL 2 and Bio-CNPs 3 g/kg feed. Results CdCl 2 exposure resulted in severe liver, intestine, and kidney damage, which was evidenced by alterations in biochemical parameters, hormonal imbalance, DNA damage, and micronucleus formation. Antioxidant defense mechanisms were compromised, as the activities of Superoxide Dismutase (SOD), Total Antioxidant Capacity (TAC), and Catalase (CAT) were reduced. mRNA expression levels of inflammatory cytokines such as IL-1β, IL-8, and LBP were also significantly elevated following CdCl 2 exposure. Conversely, Bio-CHNPs treatment showed antioxidant and anti-inflammatory effects, greatly lowering the biochemical, genotoxic, and histopathological effects induced by CdCl 2 . Conclusion The outcomes of this study are indicative of the potential of Bio-CHNPs as a promising aquaculture feed supplement, with a dual advantage of antagonizing the toxicity of environmental pollutants like Cd and imparting antioxidant and immunomodulatory effects. Bio-CHNP supplementation can be a viable strategy for remedying aquatic environmental heavy metal pollution, with the ultimate safeguarding of human health and ecosystem balance.

• Publisher: BioMed Central,BioMed Central Ltd,Springer Nature B.V,BMC
• Subject: Animals / Anticoagulants / antioxidant activity / Antioxidant defense / Antioxidants / Antioxidants - metabolism / Aquaculture / aquaculture feeds / Aquaculture industry / Aquatic ecosystems / Aquatic organisms / Bio-CHNPs / Biochemical / biomedical research / Biosynthesis / Cadmium / Cadmium chloride / Cadmium Chloride - toxicity / catalase / Catfish / Catfishes / Chemical properties / Chitin / Chitosan / Chitosan - administration & dosage / Chitosan - pharmacology / Clarias gariepinus / DNA damage / DNA Damage - drug effects / Drug delivery / Drug delivery systems / Drugs / Ecosystems / ecotoxicology / Environmental aspects / Ethics / feed supplements / Fishes / Food and nutrition / Forensic medicine / Gene expression / Genotoxicity / Health aspects / Heavy metals / histopathology / human health / Immunomodulation / Inflammation / interleukin-8 / intestines / Intestines - drug effects / Intestines - pathology / Kidney - drug effects / Kidney - pathology / kidneys / Laboratories / liver / Liver - drug effects / Liver - pathology / Medical research / Medicine / Medicine & Public Health / mutagens / Nanoparticles / pollution / RNA / Superoxide / Superoxide dismutase / Toxicants / Toxicity / Toxicology / Transgenics / Vehicles / Veterinary medicine / Veterinary Medicine/Veterinary Science / Water Pollutants, Chemical - toxicity / Water quality / Zoology