Effects of life cycle exposure to polystyrene microplastics on medaka fish (Oryzias latipes)

Protective efficacy of dietary natural antioxidants on microplastic particles-induced histopathological lesions in African catfish (Clarias gariepinus)

“…Fish exposed to MPs also exhibited connective tissue fiber accumulation around renal blood vessels and renal tubules as well as thickened blood vessel walls and a marked decrease in the carbohydrate (mainly glycogen) content within the brush borders and basement membranes of renal tubules and glomeruli. Previous reports have documented MP-induced expansion and congestion of glomerular capillaries, increased glomerular size, glomerular atrophy, vacuolation of glomerular cells, expansion of Bowman’s spaces, inflammatory cell infiltration, shrinkage and convolution of tubules, widening of intertubular spaces, and signs of fatty tubules among other pathogenic changes (Espinosa et al 2017 ; González-Doncel et al 2022 ; Hamed et al 2022a ; Hodkovicova et al 2021 ; Meng et al 2022 ; Zhu et al 2020 ). These changes may stem from increased intrarenal pressure associated with MP-induced congestion and concomitant mechanical stress on glomerular, capillary, and tubular walls (Ichimura et al 2013 ), from cellular oxidative stress, or from both pathomechanisms.…”

“…Some of the main effects that have been identified due to the ingestion of MPs include hindered predatory capacity, neurotoxicity, and reduced metabolic rate, as well as increased mortality rates (Vázquez-Rowe et al 2021 ). There have been numerous reports on the histopathological effects of MPs on fish (da Costa Araújo et al 2020 ; Espinosa et al 2017 ; González-Doncel et al 2022 ; Jabeen et al 2018 ; Karami et al 2016 ; Liu et al 2022 ; Lu et al 2016 , 2022 ; Montero et al 2022 ; Rainieri et al 2018 ; Rochman et al 2013 ; Xia et al 2020 ; Yang et al 2020 ; Yin et al 2018 ; Yu et al 2018 ), and it may be due to oxidative stress and inflammation (Hoseini et al 2022a , b ). Histopathological and histochemical examination methods provide sensitive indicators of cellular and tissue alterations within target organs such as the kidney and liver (Hamed et al 2022b ; Haredi et al 2020 ; Sayed et al 2022 ).…”

The The Effect of Exposure to Microplastic Polyvinyl Chloride (PVC) in Feed on the Growth and Survival of Tilapia (Oreochromis niloticus)

“…Over a long time, continuous exposure to microplastic chemicals can cause stressors that affect the activity of digestive Journal of Fish Health, 4(1), 42-51 (202442-51 ( ) Putrajab et al (2024 https://doi.org/10.29303/jfh.v4i1.4940 enzymes. Research by Doncel et al (2022), which asserts that exposure to microplastics in feed influences growth, further reinforces the influence of microplastic exposure on absolute weight growth. The results of research conducted during 150 days of rearing without exposure to microplastics obtained a growth value of 200 grams.…”

Ethanol, Not Water, Should Be Used as the Dispersant When Measuring Microplastic Particle Size Distribution by Laser Diffraction

“…To prevent these issues in PSD analyses, compatible dispersants are strongly recommended by manufacturers (Malvern Instruments, 2007b;Malvern Instruments, 2013). Despite this, many studies continue to use water as the dispersant (Bell et al, 2021;Curlin et al, 2021;Gonzalez-Doncel et al, 2022;Li et al, 2019;Lopez et al, 2022) or do not mention the dispersant used in their methods (Gardon et al, 2022;Li et al, 2022). In some studies surfactants are added to the dispersant to reduce MP aggregation in water (Al-Azzawi et al, 2020;Seghers et al, 2022), but these surfactants have varying dispersing effects and may generate bubbles that can be mistaken for MPs (Malvern Instruments, 2013).…”