Transient exposure to environmentally realistic concentrations of di-(2-ethylhexyl)-phthalate during sensitive windows of development impaired larval survival and reproduction success in Japanese medaka
Di-(2-ethylhexyl) phthalate (DEHP) is a well-known endocrine disruptor and it is ubiquitously distributed in the environment. However, very few studies have investigated the effects of short-term exposure to environmentally realistic concentrations of DEHP during early developmental stages and its c...
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| Format: | Article |
| Language: | English |
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Elsevier
2020-01-01
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| Series: | Toxicology Reports |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214750019305670 |
| _version_ | 1818644692520140800 |
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| author | Bonny Bun Ho Yuen Anna Boya Qiu Bruce Hao Chen |
| author_facet | Bonny Bun Ho Yuen Anna Boya Qiu Bruce Hao Chen |
| author_sort | Bonny Bun Ho Yuen |
| collection | DOAJ |
| description | Di-(2-ethylhexyl) phthalate (DEHP) is a well-known endocrine disruptor and it is ubiquitously distributed in the environment. However, very few studies have investigated the effects of short-term exposure to environmentally realistic concentrations of DEHP during early developmental stages and its chronic effects. This study monitored the long-term effects of transient exposure to DEHP in early life stages (F0 generation) and its subsequent fertilization success in F1 generation using Japanese medaka, Oryzias latipes, as model organism. Embryos (4 h post-fertilization, 4 hpf) of Japanese medaka were exposed to 0.001 ppb, 0.1 ppb, or 10 ppb DEHP for 21 days and returned to control water (without DEHP) for maturation (4 months old). At day 9 of the exposure study, mortality was significantly increased in medaka embryos (before hatching) treated with 0.001 ppb and 10 ppb DEHP. Continual exposure of young hatchlings for an additional 12 days (a total of 21 days of exposure) resulted in a significant increase in mortality in fish exposed to 0.001 ppb, 0.1 and 10 ppb DEHP. Significant reduction in egg production was observed in adult female medaka (4 months old) with prior exposure to 0.1 ppb and 10 ppb DEHP for 21 days during early development. Fertilization and hatching success were also significantly reduced in breeding pairs with prior exposure to 0.001 ppb, 0.1 ppb and 10 ppb DEHP during early life stage. Histological analysis of adult male gonads revealed a significant decline in mature sperm count accompanied by an increase in interstitial space in fish exposed to 0.1 ppb and 10 ppb DEHP during early development. Likewise, the amount of vitellogenic (mature) oocytes observed in the ovaries of adult female with transient exposure to 0.1 ppb and 10 ppb DEHP was significantly reduced when compared with the solvent control group. Our data suggest that transient exposure to ultra low concentrations of DEHP during sensitive time windows of development results in irreversible reproductive impairment which may impact fish populations negatively. |
| first_indexed | 2024-12-17T00:18:53Z |
| format | Article |
| id | doaj.art-3aed96e11ba1418eb42f62aae5001dc9 |
| institution | Directory Open Access Journal |
| issn | 2214-7500 |
| language | English |
| last_indexed | 2024-12-17T00:18:53Z |
| publishDate | 2020-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Toxicology Reports |
| spelling | doaj.art-3aed96e11ba1418eb42f62aae5001dc92022-12-21T22:10:38ZengElsevierToxicology Reports2214-75002020-01-017200208Transient exposure to environmentally realistic concentrations of di-(2-ethylhexyl)-phthalate during sensitive windows of development impaired larval survival and reproduction success in Japanese medakaBonny Bun Ho Yuen0Anna Boya Qiu1Bruce Hao Chen2Corresponding author.; Environmental Science Programme, Division of Science and Technology, Beijing Normal University, Hong Kong Baptist University, United International College, 2000 Jintong Road, Tangjiawan, Zhuhai, Guangdong Province, PR ChinaEnvironmental Science Programme, Division of Science and Technology, Beijing Normal University, Hong Kong Baptist University, United International College, 2000 Jintong Road, Tangjiawan, Zhuhai, Guangdong Province, PR ChinaEnvironmental Science Programme, Division of Science and Technology, Beijing Normal University, Hong Kong Baptist University, United International College, 2000 Jintong Road, Tangjiawan, Zhuhai, Guangdong Province, PR ChinaDi-(2-ethylhexyl) phthalate (DEHP) is a well-known endocrine disruptor and it is ubiquitously distributed in the environment. However, very few studies have investigated the effects of short-term exposure to environmentally realistic concentrations of DEHP during early developmental stages and its chronic effects. This study monitored the long-term effects of transient exposure to DEHP in early life stages (F0 generation) and its subsequent fertilization success in F1 generation using Japanese medaka, Oryzias latipes, as model organism. Embryos (4 h post-fertilization, 4 hpf) of Japanese medaka were exposed to 0.001 ppb, 0.1 ppb, or 10 ppb DEHP for 21 days and returned to control water (without DEHP) for maturation (4 months old). At day 9 of the exposure study, mortality was significantly increased in medaka embryos (before hatching) treated with 0.001 ppb and 10 ppb DEHP. Continual exposure of young hatchlings for an additional 12 days (a total of 21 days of exposure) resulted in a significant increase in mortality in fish exposed to 0.001 ppb, 0.1 and 10 ppb DEHP. Significant reduction in egg production was observed in adult female medaka (4 months old) with prior exposure to 0.1 ppb and 10 ppb DEHP for 21 days during early development. Fertilization and hatching success were also significantly reduced in breeding pairs with prior exposure to 0.001 ppb, 0.1 ppb and 10 ppb DEHP during early life stage. Histological analysis of adult male gonads revealed a significant decline in mature sperm count accompanied by an increase in interstitial space in fish exposed to 0.1 ppb and 10 ppb DEHP during early development. Likewise, the amount of vitellogenic (mature) oocytes observed in the ovaries of adult female with transient exposure to 0.1 ppb and 10 ppb DEHP was significantly reduced when compared with the solvent control group. Our data suggest that transient exposure to ultra low concentrations of DEHP during sensitive time windows of development results in irreversible reproductive impairment which may impact fish populations negatively.http://www.sciencedirect.com/science/article/pii/S2214750019305670DEHPEndocrine disruptorEmbryosReproductionOryzias latipes |
| spellingShingle | Bonny Bun Ho Yuen Anna Boya Qiu Bruce Hao Chen Transient exposure to environmentally realistic concentrations of di-(2-ethylhexyl)-phthalate during sensitive windows of development impaired larval survival and reproduction success in Japanese medaka Toxicology Reports DEHP Endocrine disruptor Embryos Reproduction Oryzias latipes |
| title | Transient exposure to environmentally realistic concentrations of di-(2-ethylhexyl)-phthalate during sensitive windows of development impaired larval survival and reproduction success in Japanese medaka |
| title_full | Transient exposure to environmentally realistic concentrations of di-(2-ethylhexyl)-phthalate during sensitive windows of development impaired larval survival and reproduction success in Japanese medaka |
| title_fullStr | Transient exposure to environmentally realistic concentrations of di-(2-ethylhexyl)-phthalate during sensitive windows of development impaired larval survival and reproduction success in Japanese medaka |
| title_full_unstemmed | Transient exposure to environmentally realistic concentrations of di-(2-ethylhexyl)-phthalate during sensitive windows of development impaired larval survival and reproduction success in Japanese medaka |
| title_short | Transient exposure to environmentally realistic concentrations of di-(2-ethylhexyl)-phthalate during sensitive windows of development impaired larval survival and reproduction success in Japanese medaka |
| title_sort | transient exposure to environmentally realistic concentrations of di 2 ethylhexyl phthalate during sensitive windows of development impaired larval survival and reproduction success in japanese medaka |
| topic | DEHP Endocrine disruptor Embryos Reproduction Oryzias latipes |
| url | http://www.sciencedirect.com/science/article/pii/S2214750019305670 |
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