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Steroid exposure during larval development of Xenopus laevis affects mRNA expression of the reproductive pituitary-gonadal axis in a sex- and stage-dependent manner. , Urbatzka R., Comp Biochem Physiol C Toxicol Pharmacol. March 1, 2014; 160 1-8.
The synthetic gestagen Levonorgestrel disrupts sexual development in Xenopus laevis by affecting gene expression of pituitary gonadotropins and gonadal steroidogenic enzymes. , Lorenz C., Toxicol Sci. December 1, 2011; 124 (2): 311-9.
Expression profiles of LHbeta, FSHbeta and their gonadal receptor mRNAs during sexual differentiation of Xenopus laevis tadpoles. , Urbatzka R., Gen Comp Endocrinol. September 1, 2010; 168 (2): 239-44.
Aqueous leaf extracts display endocrine activities in vitro and disrupt sexual differentiation of male Xenopus laevis tadpoles in vivo. , Hermelink B., Gen Comp Endocrinol. September 1, 2010; 168 (2): 245-55.
Exposure of Xenopus laevis tadpoles to finasteride, an inhibitor of 5-alpha reductase activity, impairs spermatogenesis and alters hypophyseal feedback mechanisms. , Urbatzka R., J Mol Endocrinol. November 1, 2009; 43 (5): 209-19.
Differential regulation of gonadotropins ( FSH and LH) and growth hormone (GH) by neuroendocrine, endocrine, and paracrine factors in the zebrafish--an in vitro approach. , Lin SW., Gen Comp Endocrinol. January 15, 2009; 160 (2): 183-93.
Luteinizing hormone, follicle stimulating hormone, and gonadotropin releasing hormone mRNA expression of Xenopus laevis in response to endocrine disrupting compounds affecting reproductive biology. , Urbatzka R., Gen Comp Endocrinol. April 1, 2006; 146 (2): 119-25.