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Effects of Microplastic Exposure on Catfish(Clarias gariepinus) Feed to Cyp19b Gene
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This study investigated how microplastic exposure in African catfish (Clarias gariepinus) affects expression of the Cyp19b gene, which is involved in estrogen metabolism, finding that microplastic ingestion can disrupt sex hormone-related gene expression in farmed fish.
Microplastics that are eaten by fish will bioaccumulate and will settle in the fish's body, especially in the gills and stomach organs. Exposure to microplastics in farmed animals can cause damage to gonadal cells and increase the level of aromatase in fish body so that the synthesis of androgens to become estrogene is higher. Cyp19b is a gene responsible for the synthesis of the aromatase enzyme which is related to the androgen hormone. The purpose of this study was to analyse the effect of giving polystyrene to catfish (C. gariepinus) feed on changes in the Cyp19b gene sequence. This research was descriptive experimental research. Results and observation data were analysed using a comparative descriptive method. The study was conducted by examining the brain of catfish (C. gariepinus) to determine changes in the Cyp19b gene sequence. The first step was to extract DNA from the gonads and fish brains, then examine the Cyp19b gene sequence. The next step was constructed a phylogenetic tree to determine if there is a change in kinship in the Cyp19b gene sequence. The results showed a trend towards changes in the Cyp19b gene sequence which can be described in a phylogenetic tree.
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This study investigated low-density polyethylene microplastics as carriers of estrogen-disrupting chemicals in marine fish, finding that LDPE adsorbed estrogens and their dietary ingestion elevated vitellogenin and CYP1A gene expression, indicating endocrine disruption in exposed organisms.
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Researchers exposed Nile tilapia to 100 nm polystyrene microplastics and performed comprehensive transcriptomic profiling of cytochrome P450 genes in liver tissue, identifying hepatic cyp24a1 as a sensitive and specific biomarker for diagnosing polystyrene microplastic exposure in fish.
Effect of Microplastic Exposures to The Male Gonad Histology of Catfish (Clarias gariepinus)
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This study found that microplastic exposure damaged the reproductive organs of male catfish, causing structural changes in gonad tissue. The findings raise concerns about microplastic effects on fish reproductive health, which could impact aquaculture productivity and suggests that these particles may pose broader reproductive risks to aquatic species in our food supply.
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