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Dietary exposure to sulfamethazine,nanoplastics and their binary mixture disrupts the spermatogenesis of marine medaka(oryzias melastigma)

引用

Acta Oceanologica Sinica 2024年第8期43卷 104-110页

作者： Yuting Zhang Ruanni Chen Zhiqiang Chen Xiaoyu Fu Ziyi Wu Jinwan Chen Lingtian Xie Humin Zong Jingli Mu Fujian Key Laboratory on Conservation and Sustainable Utilization of Marine Biodiversity College of Geography and OceanographyMinjiang UniversityFuzhou 350108China College of Environmental and Safety Engineering Fuzhou UniversityFuzhou 350108China SCNU Environmental Research Institute Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety&MOE Key Laboratory of Theoretical Chemistry of EnvironmentSouth China Normal UniversityGuangzhou 510006China National Marine Environmental Monitoring Center Dalian 116023China

In the coastal environment,the co-occurrence of antibiotic and nanoplastic pollution is *** their individual and combined toxicity to marine organisms is of great *** the present study,the reproductive toxicity of sulfamethazine(SMZ)and nanoplastics(polystyrene,PS)via the dietary route on the spermatogenesis of marine medaka(oryzias melastigma)was *** 30 d of dietary exposure,SMZ alone decreased the gonadosomatic index(GSI)value(~35%)and the proportion of undifferentiated type A spermatogonia(A_(und))(~40%),probably by disrupting the testicular sex hormone production,the spermatogenesis-related growth factor network and the balance of *** exposure to PS did not affect the GSI value or the proportions of germ cells at different developmental stages,but dysregulated the expression of several spermatogenesis-related ***,the presence of PS alleviated the decreased GSI value caused by *** alleviation effect was achieved by enhancing the spermatogonia differentiation instead of reversing the suppressed self-renewal of A_(und),suggesting that the mixture of PS and SMZ could cause reproductive effects in a different *** findings expand our knowledge of threats of ubiquitous antibiotic and nanoplastic pollution to fish reproduction and population.

关键词： nanoplastics antibiotics spermatogenesis combined toxicity oryzias melastigma

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