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Long-Term Toxic Impact of 2,3,7,8-Tetrachlorodibenzo- p -dioxin on the Reproduction, Sexual Differentiation, and Development of Different Life Stages of Gobiocypris rarus and Daphnia magna

Identifieur interne : 000B02 ( Istex/Corpus ); précédent : 000B01; suivant : 000B03

Long-Term Toxic Impact of 2,3,7,8-Tetrachlorodibenzo- p -dioxin on the Reproduction, Sexual Differentiation, and Development of Different Life Stages of Gobiocypris rarus and Daphnia magna

Auteurs : W. Z. Wu ; W. Li ; Y. Xu ; J. W. Wang

Source :

RBID : ISTEX:4F34B84F621D6B4DF0D94291D1BFF0FB3D64C9D9

English descriptors

Abstract

The sexual ratio of Gobiocypris rarus exposed to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) and 17β-estradiol from embryo to sexually mature revealed feminization and overdevelopment of connective tissue in male fish gonad in 2–30 pg/L TCDD concentration range. Daphnia magna was not sensitive to the high dose of TCDD (0.1–1000 ng/ml), but the reproduction of D. magna treated with TCDD decreased after the 8th day. 7-Ethoxyresorufin-O-deethylase (EROD) activities in newly fertilized eggs of G. rarus exposed to TCDD dosage groups (1000–100,000 pg/L) were significantly induced and increased with TCDD concentrations at the early life stage, while no difference was found between low TCDD dosage groups (<100 pg/L), but a good relationship between the EROD activity and the TCDD concentration was observed during a long-term developmental stage. There was a pericardial edema formed in a 2-week yolk-sac at the concentration of 1000 pg/L TCDD. But in the exposure group (2 pg/L TCDD for 120 days), the cell nuclei of hepatocytes was far from the center and packed toward the cell membrane; the cristae of most mitochondria in the cell dropped and collapsed; the rough endoplasmic reticulum broke into fragments; and numerous lipid droplets formed in the cell.

Url:
DOI: 10.1006/eesa.2000.2013

Links to Exploration step

ISTEX:4F34B84F621D6B4DF0D94291D1BFF0FB3D64C9D9

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<title>Long-Term Toxic Impact of 2,3,7,8-Tetrachlorodibenzo-</title>
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<name type="personal">
<namePart type="given">W.Z.</namePart>
<namePart type="family">Wu</namePart>
<affiliation>State Key Laboratory for Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, P. R. China</affiliation>
<description>To whom correspondence should be addressed. Fax: (0086 27) 87875132. E-mail:wuwz@ihb.ac.cn.</description>
<role>
<roleTerm type="text">author</roleTerm>
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</name>
<name type="personal">
<namePart type="given">W.</namePart>
<namePart type="family">Li</namePart>
<affiliation>State Key Laboratory for Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, P. R. China</affiliation>
<role>
<roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal">
<namePart type="given">Y.</namePart>
<namePart type="family">Xu</namePart>
<affiliation>State Key Laboratory for Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, P. R. China</affiliation>
<role>
<roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal">
<namePart type="given">J.W.</namePart>
<namePart type="family">Wang</namePart>
<affiliation>State Key Laboratory for Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, P. R. China</affiliation>
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<dateIssued encoding="w3cdtf">2001</dateIssued>
<copyrightDate encoding="w3cdtf">2001</copyrightDate>
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<languageTerm type="code" authority="iso639-2b">eng</languageTerm>
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<abstract lang="en">The sexual ratio of Gobiocypris rarus exposed to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) and 17β-estradiol from embryo to sexually mature revealed feminization and overdevelopment of connective tissue in male fish gonad in 2–30 pg/L TCDD concentration range. Daphnia magna was not sensitive to the high dose of TCDD (0.1–1000 ng/ml), but the reproduction of D. magna treated with TCDD decreased after the 8th day. 7-Ethoxyresorufin-O-deethylase (EROD) activities in newly fertilized eggs of G. rarus exposed to TCDD dosage groups (1000–100,000 pg/L) were significantly induced and increased with TCDD concentrations at the early life stage, while no difference was found between low TCDD dosage groups (<100 pg/L), but a good relationship between the EROD activity and the TCDD concentration was observed during a long-term developmental stage. There was a pericardial edema formed in a 2-week yolk-sac at the concentration of 1000 pg/L TCDD. But in the exposure group (2 pg/L TCDD for 120 days), the cell nuclei of hepatocytes was far from the center and packed toward the cell membrane; the cristae of most mitochondria in the cell dropped and collapsed; the rough endoplasmic reticulum broke into fragments; and numerous lipid droplets formed in the cell.</abstract>
<note type="content">Section title: Regular Article</note>
<subject lang="en">
<genre>Keywords</genre>
<topic>TCDD</topic>
<topic>reproduction</topic>
<topic>sexual differentiation</topic>
<topic>development.</topic>
</subject>
<relatedItem type="host">
<titleInfo>
<title>Ecotoxicology and Environmental Safety</title>
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<titleInfo type="abbreviated">
<title>YEESA</title>
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<genre type="journal">journal</genre>
<originInfo>
<dateIssued encoding="w3cdtf">200103</dateIssued>
</originInfo>
<identifier type="ISSN">0147-6513</identifier>
<identifier type="PII">S0147-6513(00)X0002-4</identifier>
<part>
<date>200103</date>
<detail type="volume">
<number>48</number>
<caption>vol.</caption>
</detail>
<detail type="issue">
<number>3</number>
<caption>no.</caption>
</detail>
<extent unit="issue pages">
<start>223</start>
<end>322</end>
</extent>
<extent unit="pages">
<start>293</start>
<end>300</end>
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<identifier type="istex">4F34B84F621D6B4DF0D94291D1BFF0FB3D64C9D9</identifier>
<identifier type="DOI">10.1006/eesa.2000.2013</identifier>
<identifier type="PII">S0147-6513(00)92013-X</identifier>
<accessCondition type="use and reproduction" contentType="copyright">©2001 Academic Press</accessCondition>
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<recordOrigin>Academic Press, ©2001</recordOrigin>
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