Abstract Title:

Teratogenic and anti-metamorphic effects of bisphenol A on embryonic and larval Xenopus laevis.

Abstract Source:

Gen Comp Endocrinol. 2003 Sep;133(2):189-98. PMID: 12928009

Abstract Author(s):

Shawichi Iwamuro, Michiaki Sakakibara, Megumi Terao, Akiko Ozawa, Chizuko Kurobe, Tomokuni Shigeura, Mayuko Kato, Sakae Kikuyama

Article Affiliation:

Department of Biology, Faculty of Science, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan. iwamuro@bio.sci.toho-u.ac.jp


Effects of bisphenol A (BPA) on embryonic and larval development were investigated. In Xenopus laevis blastulae treated with 2.5-3.0 x 10(-5) M BPA or with 10(-5) M 17beta estradiol (E2), malformation of the head region, scoliosis (curved vertebrate), and suppression of organogenesis were observed. In addition, 10(-5)-10(-4) M BPA blocked tri-iodothyronine (T3)-inducible resorption of the tail segments from premetamorphic (stage 52-54) larvae in vitro. When stage 52 tadpoles were immersed in 1.0-2.5 x 10(-5) M BPA, deceleration of both spontaneous and thyroxin (T4)-induced metamorphic changes occurred. Furthermore, BPA suppressed thyroid hormone receptor (TR) beta gene expression both in vivo and in vitro. Thus, we concluded that BPA at the concentrations examined affects both embryonic development and larval metamorphosis.

Study Type : Animal Study
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