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Cheng C, Tian W, Wu Y, Wei J, Yang L, Wei Y, Jiang J. Microplastics have additive effects on cadmium accumulation and toxicity in Rice flower carp (Procypris merus). THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 930:172679. [PMID: 38677436 DOI: 10.1016/j.scitotenv.2024.172679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 03/30/2024] [Accepted: 04/20/2024] [Indexed: 04/29/2024]
Abstract
Procypris merus, a local fish species found in Guangxi, China is often exposed to both microplastics (MPs) and Cd. However, it remains unclear how these two pollutants affect P. merus. Therefore, we investigated the effects of MPs on Cd accumulation in P. merus. To this end, P. merus was separately exposed to Cd and MPs (500 μg/L) or their combination for 14 days. We found that MPs enhanced Cd accumulation in liver and gills of P. merus. Further, both the single-contaminant (MP and Cd) and combined treatments resulted in lesions in these two tissues, with more severe damage associated with the combined treatment. Even though the effect of MP on the antioxidant defense system of P. merus was limited, the Cd-only and combined treatments considerably affected the antioxidant parameters of P. merus, with the combined treatment showing a stronger effect. GO and KEGG analyses revealed that the differentially expressed genes (DEGs; TNF-related apoptosis-inducing ligand receptor, trail-r) in the Cd-only treatment group were enriched for immune-related GO terms and cell growth and death related pathways, indicating that Cd toxicity affected immune defense in P. merus. The MP-only treatment downregulated DEGs (acyl-CoA synthetase long chain family member 1a, acsl1a) related to lipid metabolism, possibly leading to lipid accumulation in the liver. The combined treatment also upregulated DEGs (aspartate aminotransferase 1, ast 1) associated with immune-related GO terms and amino acid metabolism pathways, suggesting that it affected immune function in P. merus, thereby negatively impacting its health. Results indicated that MPs have additive effects on Cd accumulation and toxicity in rice flower carp. Consequently, MPs ingested by P. merus can promote Cd accumulation, more adverse effects on the health may occur after combined exposure, which can eventually reach humans through the food chain and pose potential risks to human health.
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Affiliation(s)
- Chunxing Cheng
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Guangxi Normal University, Ministry of Education, Guilin 541006, China
| | - Wenfei Tian
- College of Intelligent Medicine and Biotechnology, Guilin Medical University, Guilin 541004, China
| | - Yangyang Wu
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Guangxi Normal University, Ministry of Education, Guilin 541006, China
| | - Jinyou Wei
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Guangxi Normal University, Ministry of Education, Guilin 541006, China
| | - Liu Yang
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Guangxi Normal University, Ministry of Education, Guilin 541006, China
| | - Yuwei Wei
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Guangxi Normal University, Ministry of Education, Guilin 541006, China
| | - Jiaoyun Jiang
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Guangxi Normal University, Ministry of Education, Guilin 541006, China; Guangxi Key Laboratory of Rare and Endangered Animal Ecology, Gangxi Normal University, Guilin 541006, China; Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning 530001, China.
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Liu F, Zhang X, Wei X, Li Y, Liu W, Gan G, Xiao L, Wang X, Luo H. Gonadal transcriptome analysis of paradise fish Macropodus opercularis to reveal sex-related genes. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. PART D, GENOMICS & PROTEOMICS 2023; 48:101125. [PMID: 37666127 DOI: 10.1016/j.cbd.2023.101125] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 08/14/2023] [Accepted: 08/16/2023] [Indexed: 09/06/2023]
Abstract
Macropodus opercularis is an ornamental fish species endemic to China, with obvious sexual dimorphism in phenotype. To obtain the gene expression profile of the gonads of M. opercularis and explore its sex-related genes, six cDNA libraries were constructed from the sexually mature M. opercularis, and RNA-seq analysis was performed. The sequenced clean data were assembled by de novo splicing to generate 171,415 unigenes, and differentially expressed genes (DEGs) screening revealed that there were 41,638 DEGs in the gonads of M. opercularis. By comparing those DEGS in the ovary with the testis, we found 29,870 DEGs were upregulated and 11,768 DEGs were downregulated. Kyoto Encyclopedia of Genes and Genomes (KEGG) and gene ontology (GO) enrichment analysis showed that GO terms related to cell cycle and gamete formation were enriched, and pathway signals related to sex differences, such as FoxO signalling pathway and PI3K-Akt signalling pathway, were also detected. Reverse transcript fluorescence quantitative PCR (RT-qPCR) validation of 14 DEGs associated with sex differences showed that the RT-qPCR results were consistent with RNA-Seq analysis, and five genes, foxl2, sox3, foxo, zar1, cyp19a1, were significantly expressed in the ovaries. dmrt1, cyp11b, amh, sf1, sox9, gdf6, dmrt3, fstl1 and hsd11b2, a total of nine genes were significantly expressed in the testis. The results of this study provide a basis for the study of gonadal differentiation, developmental mechanisms and related functional genes in M. opercularis.
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Affiliation(s)
- Fan Liu
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, College of Fisheries, Southwest University, Chongqing 402460, China. https://twitter.com/@FanLiu_
| | - Xueling Zhang
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, College of Fisheries, Southwest University, Chongqing 402460, China
| | - Xiaokai Wei
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, College of Fisheries, Southwest University, Chongqing 402460, China
| | - Yu Li
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, College of Fisheries, Southwest University, Chongqing 402460, China
| | - Wei Liu
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, College of Fisheries, Southwest University, Chongqing 402460, China
| | - Guochen Gan
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, College of Fisheries, Southwest University, Chongqing 402460, China
| | - Lingling Xiao
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, College of Fisheries, Southwest University, Chongqing 402460, China
| | - Xinyue Wang
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, College of Fisheries, Southwest University, Chongqing 402460, China
| | - Hui Luo
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, College of Fisheries, Southwest University, Chongqing 402460, China.
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