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Zhou R, Zhou D, Ding Z, Bao X, Jin Q. Effects of polystyrene nanoplastics on melanin interference toxicity and transgenerational toxicity of ethylhexyl salicylate based on DNA methylation sequencing. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2023; 256:106402. [PMID: 36709616 DOI: 10.1016/j.aquatox.2023.106402] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 12/07/2022] [Accepted: 01/21/2023] [Indexed: 06/18/2023]
Abstract
Organic ultraviolet filters (OUVFs) are new hydrophobic organic pollutants in the aquatic environment. When ingested by aquatic organisms, OUVFs can induce a variety of toxic effects in organisms and be transferred to offspring. However, as the main active ingredient in sunscreens, OUVFs have rarely been investigated for their melanin interference toxicity or transgenerational toxic effects on aquatic organisms and their interactive toxic effects with nanoplastics (NPs). Here, we show the mechanism by which OUVFs interfere with melanogenesis in parental or offspring zebrafish and the effect of polystyrene (PS) NPs on the melanin-interference effect of OUVFs. We found that EHS induced significant enrichment of the melanogenesis pathway, inhibited the expression of the key melanin gene microphthalmia-associated transcription factor a (mitfa) and induced the mitf tyrosinase (tyr)-dopachrome tautomerase (dct)-tyrosinase related protein 1 (tyrp1) signaling cascade in parents, which ultimately induced a decrease in melanin content. After reproduction, transgenerational melanin interference effects of EHS may occur through the maternal inheritance of mitfa. Coexisting PS-NPs may inhibit the melanin interference toxicity or transgenerational toxicity of EHS by reducing ultraviolet irritation to the skin through adsorption of EHS. Our results demonstrate the ecotoxic potential of OUVFs in terms of melanin interference and the interference of PS-NP carrier effects on the toxicity of OUVFs. We anticipate that our assay will contribute to the assessment of the toxic effects of OUVFs and provide a basis for the interactive ecotoxicity assessment of PS-NPs and hydrophobic organic pollutants.
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Affiliation(s)
- Ranran Zhou
- School of Environmental Science & Engineering, Nanjing Tech University, 30 Puzhu Southern Road, Nanjing 211816, China
| | - Dao Zhou
- School of Environmental Science & Engineering, Nanjing Tech University, 30 Puzhu Southern Road, Nanjing 211816, China
| | - Zhuhong Ding
- School of Environmental Science & Engineering, Nanjing Tech University, 30 Puzhu Southern Road, Nanjing 211816, China.
| | - Xuhui Bao
- Shanghai Investigation, Design & Research Institute Co., Ltd, No.1-6, Lane 65, Linxin Road, Changning District, Shanghai 200335, China
| | - Qijie Jin
- School of Environmental Science & Engineering, Nanjing Tech University, 30 Puzhu Southern Road, Nanjing 211816, China
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Xie Z, Zhou R, Ding Z, Zhou D, Jin Q. Melanin interference toxicity or transgenerational toxicity of organic UV filter ethylhexyl salicylate on zebrafish. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 845:157365. [PMID: 35842152 DOI: 10.1016/j.scitotenv.2022.157365] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 07/05/2022] [Accepted: 07/10/2022] [Indexed: 06/15/2023]
Abstract
With the improvement of human health awareness, the production and usage of sunscreens have increased dramatically, and their active ingredients, organic ultraviolet (UV) filters (OUVFs), have the potential to induce melanin abnormalities in aquatic organisms due to their UV-absorbing properties as they enter the aquatic environment directly with the washing of skin during water activities. In this paper, the melanin interference toxicity or transgenerational toxicity effects of typical OUVFs ethylhexyl salicylate (EHS) on zebrafish (Danio rerio) were investigated based on transcriptomic sequencing technology. Results showed that EHS induced significant enrichment of the melanin-related pathway cAMP signaling pathway in parental skin tissue through UV absorption, with sensitive genes identified as melanocortin 1 receptor, protein kinase A catalytic subunit beta a, calcium/calmodulin-dependent protein kinase II delta 2, adenylate cyclase 1 and G protein subunit alpha I a. qRT-PCR verification results showed that EHS may inhibit the expression of the melanin master regulator microphthalmia-associated transcription factor a (mitfa) and its induced signaling cascade mitf-tyrosinase (tyr)-dopachrome tautomerase (dct)-tyrosinase related protein 1 (tyrp1) by inducing abnormal expression of the above sensitive genes, thereby reducing melanogenesis. After reproduction, the melanin interference effect of EHS on the parents can be carried over to offsprings through maternal inheritance of abnormally expressed mitfa and parental transfer of pollutants, as evidenced by significant enrichment of melanogenesis pathway, abnormal expression of sensitive genes mitfa, tyr, dct and tyrp1b and significant decreases in melanin content and spinal melanin area. These findings revealed the specific melanin interference toxicity of OUVFs with UV-absorbing properties, facilitating a comprehensive ecological risk assessment of OUVFs and providing scientific support for the management of new pollutants.
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Affiliation(s)
- Zhongtang Xie
- Key Laboratory for Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
| | - Ranran Zhou
- School of Environmental Science & Engineering, Nanjing Tech University, 30 Puzhu Southern Road, Nanjing 211816, China.
| | - Zhuhong Ding
- School of Environmental Science & Engineering, Nanjing Tech University, 30 Puzhu Southern Road, Nanjing 211816, China
| | - Dao Zhou
- School of Environmental Science & Engineering, Nanjing Tech University, 30 Puzhu Southern Road, Nanjing 211816, China
| | - Qijie Jin
- School of Environmental Science & Engineering, Nanjing Tech University, 30 Puzhu Southern Road, Nanjing 211816, China
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Identification and characterization of germ cell genes vasa and dazl in a protogynous hermaphrodite fish, orange-spotted grouper (Epinephelus coioides). Gene Expr Patterns 2020; 35:119095. [DOI: 10.1016/j.gep.2020.119095] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2019] [Revised: 01/18/2020] [Accepted: 01/25/2020] [Indexed: 12/21/2022]
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Macromolecular Characterization of Swordfish Oocytes by FTIR Imaging Spectroscopy. Sci Rep 2019; 9:8850. [PMID: 31222120 PMCID: PMC6586932 DOI: 10.1038/s41598-019-45065-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Accepted: 05/27/2019] [Indexed: 01/30/2023] Open
Abstract
During folliculogenesis, primary oocytes of teleosts grow by several orders of magnitude by-self synthesizing proteins and mRNA, or sequestering from blood specific macromolecular components, such as fatty acids and vitellogenin. All these materials are stored into cortical alveoli, yolk globules or oil droplets during oocyte development. The proper synthesis, storage and displacement of these macromolecular components inside the oocyte play a key role for a successful fertilization process and for the subsequently correct embryo development. In this study, for the first time, the FTIR Imaging (FTIRI) spectroscopy has been applied to characterize the chemical building blocks of several cellular components of swordfish oocytes at different developmental stages. In particular, the spectral features of previtellogenic (PV), vitellogenic (VTG), mature (M) and atretic (A) follicles as well as and of cortical alveoli (CA), yolk vesicles (YV), oil droplets (OD) and Zona Radiata (ZR) have been outlined, providing new insights in terms of composition and topographical distribution of macromolecules of biological interest such as lipids, proteins, carbohydrates and phosphates. The macromolecular characterization of swordfish oocytes at different developmental stages represents a starting point and a useful tool for the assessment of swordfish egg quality caught in different conditions, such as periods of the year or different fishing area.
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Wang Y, Li WH, Li Z, Liu W, Zhou L, Gui JF. BMP and RA signaling cooperate to regulate Apolipoprotein C1 expression during embryonic development. Gene 2015; 554:196-204. [DOI: 10.1016/j.gene.2014.10.047] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2014] [Revised: 10/14/2014] [Accepted: 10/27/2014] [Indexed: 12/20/2022]
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Dwarakanath M, Lim M, Xu H, Hong Y. Differential expression of boule and dazl in adult germ cells of the Asian seabass. Gene 2014; 549:237-42. [PMID: 25084124 DOI: 10.1016/j.gene.2014.07.068] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Revised: 07/06/2014] [Accepted: 07/24/2014] [Indexed: 12/22/2022]
Abstract
Fertility genes boule and dazl constitute the evolutionarily conserved DAZ (Deleted in AZoospermia) family of RNA binding proteins essential for germline development across animal phyla. Here we report the cloning and expression analysis of boule and dazl from the Asian seabass (Lates calcarifer), a marine fish that undergoes sequential male-to-female sex reversal. Molecular cloning and sequence comparison led to the identification of boule and dazl cDNAs. RT-PCR analysis showed that both boule and dazl RNAs were restricted to the gonads among adult organs examined. Chromogenic in situ hybridization revealed germ cell-specific expression for both boule and dazl in female and male adults. Importantly, distinct differences were found between boule and dazl in terms of temporospatial expression and subcellular distribution. The boule RNA was abundant in late gametogenic cells except sperm. Interestingly, dazl expression increases in early oocytes and concentrates in a perinuclear speckle that appears to develop ultimately into the Balbiani body in advanced oocytes. The dazl RNA was found to be abundant in spermatocytes but hardly detectable in sperm. These data demonstrate that boule and dazl are germ cell markers in the adult Asian seabass, and that bisexual germline-specific expression has been conserved for boule and dazl in fish.
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Affiliation(s)
- Manali Dwarakanath
- Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, 117543, Singapore
| | - Menghuat Lim
- Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, 117543, Singapore
| | - Hongyan Xu
- Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, 117543, Singapore
| | - Yunhan Hong
- Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, 117543, Singapore.
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Yuan Y, Li M, Hong Y. Light and electron microscopic analyses of Vasa expression in adult germ cells of the fish medaka. Gene 2014; 545:15-22. [DOI: 10.1016/j.gene.2014.05.017] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Revised: 04/20/2014] [Accepted: 05/01/2014] [Indexed: 12/18/2022]
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Li M, Zhu F, Hong N, Zhang L, Hong Y. Alternative transcription generates multiple Mitf isoforms with different expression patterns and activities in medaka. Pigment Cell Melanoma Res 2013; 27:48-58. [PMID: 24118994 DOI: 10.1111/pcmr.12183] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2013] [Accepted: 10/09/2013] [Indexed: 12/21/2022]
Abstract
Microphthalmia-associated transcription factor (Mitf) is best known for distinct functions in multiple cell lineages including melanocytes, mast cells, and osteoclasts. In mammals, mitf produces multiple Mitf isoforms by alternative transcription and splicing. The fish medaka has two mitf genes, mitf1 and mitf2. Here, we report differential expression and activities of medaka Mitf isoforms. Molecular cloning identified four mitf1 variants encoding isoforms Mitf1A, MitfB, MitfH, and MitfM, and only one mitf2RNA encoding Mitf2M, which exhibited differential expression. Mitf1 isoforms and Mitf2M differed dramatically in activating the dazl and tyrosinase promoters DAZ and TYR. Interestingly, Mitf1ΔN, an N-terminus-less Mitf1 mutant form, retained activity to activate TYR but not DAZ. Importantly, Mitf1B was also sufficient for inducing melanocyte differentiation and endogenous tyrosinase RNA expression in medaka embryonic stem cells. Intriguingly, Mitf1 isoforms possessed considerable differences in inducing the expression of multiple cell lineage marker genes. Therefore, alternative mitf transcription is a conserved mechanism from fish to mammals, and medaka Mitf1 isoforms show differences in expression and activity. We conclude that differential expression of isoforms contributes to multiple distinct functions of Mitf in vertebrates.
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Affiliation(s)
- Mingyou Li
- Department of Biological Sciences, National University of Singapore, Singapore City, Singapore; College of Fisheries and Life Science, Shanghai Ocean University, Shanghai, China
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Li M, Zhu F, Hong Y. Differential evolution of duplicated medakafish mitf genes. Int J Biol Sci 2013; 9:496-508. [PMID: 23781143 PMCID: PMC3677685 DOI: 10.7150/ijbs.4668] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2012] [Accepted: 05/08/2013] [Indexed: 12/22/2022] Open
Abstract
Gene duplication is a major force of evolution. One whole genome duplication (WGD) event in the fish ancestor generated genome-wide duplicates in all modern species. Coloration and patterning on the animal body surface exhibit enormous diversity, representing a mysterious and ideal system for understanding gene evolution. Surface colors and patterns are determined primarily by pigment cells in the skin and eye. Thus, microphthalmia-associated transcription factor (Mitf) as a master regulator of melanocyte development is excellent for studying the evolution of WGD-derived gene duplicates. Here we report the evolution of mitf duplicate, mitf1 and mitf2, in the fish medaka (Oryzias latipes), which encode medaka co-homologs Mitf1 and Mitf2 of the mouse Mitf. Compared to mitf1, mitf2 exhibits an accelerated sequence divergence and loses melanocytic expression in embryos at critical developmental stages. Compared to a Xiphophorus counterpart, the medaka Mitf2 displayed a reduced activity in activating melanogenic gene expression by reporter assays and RT-PCR analyses. We show that the medaka Mitf2 has the ability to induce melanocyte differentiation in medaka embryonic stem cells but at a remarkably reduced efficiency compared to the Xiphophorus counterpart. Our data suggest differential evolution of the medaka mitf duplicate, with mitf1 adopting conservation and mitf2 employing degeneration, which is different from the duplication-degeneration-complementation proposed as the mechanism to preserve many gene duplicates in zebrafish. Our finding reveals species-specific variations for mitf duplicate evolution, in agreement with enormous diversity of body coloration and patterning.
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Affiliation(s)
- Mingyou Li
- Department of Biological Sciences, National University of Singapore, Singapore 117543, Singapore
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