Linked Life Data

16139362

Source:http://linkedlifedata.com/resource/pubmed/id/16139362

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2006-6-9
pubmed:abstractText
The West African clawed frog (Silurana tropicalis), which resembles the South African clawed frog (Xenopus laevis), but is somewhat smaller, has a diploid genome and a shorter generation time. Therefore, S. tropicalis has the potential for use as a new model in ecotoxicology. We demonstrated a S. tropicalis metamorphosis assay based on Xenopus Metamorphosis Assay (XEMA) using 1 microg/L thyroxine (T4) and 75 mg/L propylthiouracil (PTU). Tadpoles at developmental stages 48-50 were exposed to chemicals for 28 days and total body length, developmental stage, and hind limb length were recorded every 7 days. Significant differences in developmental stage and total body length were found for both T4 and PTU after 7-day exposure, which were similar to the results of the XEMA ring-test using the same chemicals. Moreover, in the present study, we measured hind limb length as a new endpoint of thyroid axis. Significant differences in the hind limb length were encountered in both T4 and PTU treatments after 7 days of exposure. These results suggest that S. tropicalis can be used in a XEMA-like protocol to detect agonist and antagonist effects of chemicals on the thyroid system. Hind limb length is also a suitable endpoint in such protocols. A new test protocol detecting both thyroid disruption and reproductive effects of chemicals using S. tropicalis should be established in the near future.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0147-6513
pubmed:author
pubmed:issnType
Print
pubmed:volume
64
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
281-7
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2006
pubmed:articleTitle
Development of metamorphosis assay using Silurana tropicalis for the detection of thyroid system-disrupting chemicals.
pubmed:affiliation
Biotechnology Research Laboratory, Towa Kagaku Co., Ltd., 3-13-26 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-0046, Japan.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't, Validation Studies