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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Kamata, Ryo Shiraishi, Fujio Takahashi, Shinji Shimizu, Akira Shiraishi, Hiroaki |
| Description | Country affiliation: Japan Author Affiliation: Kamata R ( Research Centre for Environmental Risk, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan. kamata.ryo@nies.go.jp) |
| Abstract | Avian species have the possible risk of embryonic exposure to persistent, lipophilic environmental contaminants, such as dichlorodiphenyltrichloroethane (DDT), by transfer of chemicals accumulated in mother birds to eggs. To model developmental and reproductive disorders of wild birds living in contaminated areas, we exposed Japanese quails in ovo to o,p'-DDT prior to incubation. A positive estrogenic substance diethylstilbestrol (DES; 1 and 10 ng/g of egg) and o,p'-DDT (1-100 microg/g of egg) were injected into the yolk before incubation. Treatment with o,p'-DDT (10 or 100 microg/g) but not with DES significantly reduced the hatchability of eggs. After sexual maturation, o,p'-DDT affected eggshell formation in female quails but had little influence on laying; high doses of o,p'-DDT significantly reduced eggshell strength, shell weight, and shell thickness, and several females treated with 100 microg o,p'-DDT/g laid eggs lacking shells. Diethylstilbestrol decreased egg production itself but had little effect on the eggshell. Both o,p'-DDT and DES caused dose-dependent shortening of the left oviduct and abnormal development of the right oviduct in females, while testis asymmetry was observed in males treated with a high dose of DES. In the uterus of the oviduct, the mRNAs for calcium-regulating factors osteopontin and calbindin D28K were reduced by both treatments, particularly that with o,p'-DDT. The results indicated that transovarian exposure to o,p'-DDT could bring about population declines in avian species through loss of fecundity caused by depression of hatchability and dysfunction of the reproductive tract. |
| File Format | HTM / HTML |
| ISSN | 07307268 |
| Issue Number | 4 |
| Volume Number | 28 |
| e-ISSN | 15528618 |
| Journal | Environmental Toxicology and Chemistry |
| Language | English |
| Publisher | Wiley |
| Publisher Date | 2009-04-01 |
| Publisher Place | United States |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Testis Research Support, Non-u.s. Gov't Clutch Size Toxicity Discipline Environmental Health Cholesterol Side-chain Cleavage Enzyme Discipline Toxicology Male Blood Journal Article Calbindins Embryology Reproduction S100 Calcium Binding Protein G Ddt Dose-response Relationship, Drug Discipline Chemistry Genetics Diethylstilbestrol Female Physiology Egg Shell Coturnix Abnormalities Rna, Messenger Organ Size Osteopontin Administration & Dosage Drug Effects Growth And Development Oviducts Gene Expression Regulation, Enzymologic Reproducibility Of Results Growth & Development Animals Embryo, Nonmammalian Progesterone Toxicity Tests |
| Content Type | Text |
| Resource Type | Article |
| Subject | Environmental Chemistry Health, Toxicology and Mutagenesis |
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