Werner Kloas - Publications

Publications (66)

XB-PERS-3384

Publications By Werner Kloas

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Impacts of the synthetic androgen Trenbolone on gonad differentiation and development - comparisons between three deeply diverged anuran families., Rozenblut-Kościsty B, Ogielska M, Hahn J, Kleemann D, Kossakowski R, Tamschick S, Schöning V, Krüger A, Lutz I, Lymberakis P, Kloas W, Stöck M., Sci Rep. July 3, 2019; 9 (1): 9623.
Endocrine disruption by environmental gestagens in amphibians - A short review supported by new in vitro data using gonads of Xenopus laevis., Ziková A, Lorenz C, Hoffmann F, Kleiner W, Lutz I, Stöck M, Kloas W., Chemosphere. August 1, 2017; 181 74-82.
Diclofenac can exhibit estrogenic modes of action in male Xenopus laevis, and affects the hypothalamus-pituitary-gonad axis and mating vocalizations., Efosa NJ, Kleiner W, Kloas W, Hoffmann F., Chemosphere. April 1, 2017; 173 69-77.
p,p'-Dichlordiphenyldichloroethylene (p,p'-DDE) can elicit antiandrogenic and estrogenic modes of action in the amphibian Xenopus laevis., Hoffmann F, Kloas W., Physiol Behav. December 1, 2016; 167 172-178.
The plasticizer bisphenol A affects somatic and sexual development, but differently in pipid, hylid and bufonid anurans., Tamschick S, Rozenblut-Kościsty B, Ogielska M, Kekenj D, Gajewski F, Krüger A, Kloas W, Stöck M., Environ Pollut. September 1, 2016; 216 282-291.
The synthetic gestagen levonorgestrel directly affects gene expression in thyroid and pituitary glands of Xenopus laevis tadpoles., Lorenz C, Opitz R, Trubiroha A, Lutz I, Zikova A, Kloas W., Aquat Toxicol. August 1, 2016; 177 63-73.
Impaired gonadal and somatic development corroborate vulnerability differences to the synthetic estrogen ethinylestradiol among deeply diverged anuran lineages., Tamschick S, Rozenblut-Kościsty B, Ogielska M, Lehmann A, Lymberakis P, Hoffmann F, Lutz I, Schneider RJ, Kloas W, Stöck M., Aquat Toxicol. August 1, 2016; 177 503-14.
Sex reversal assessments reveal different vulnerability to endocrine disruption between deeply diverged anuran lineages., Tamschick S, Rozenblut-Kościsty B, Ogielska M, Lehmann A, Lymberakis P, Hoffmann F, Lutz I, Kloas W, Stöck M., Sci Rep. March 31, 2016; 6 23825.
17α-Ethinylestradiol can disrupt hemoglobin catabolism in amphibians., Garmshausen J, Kloas W, Hoffmann F., Comp Biochem Physiol C Toxicol Pharmacol. May 1, 2015; 171 34-40.
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, Lorenz C, Wiedemann C, Lutz I, Kloas W., Comp Biochem Physiol C Toxicol Pharmacol. March 1, 2014; 160 1-8.
Sex chromosome conservation, DMRT1 phylogeny and gonad morphology in diploid Palearctic green toads (Bufo viridis subgroup)., Tamschick S, Rozenblut-Kościsty B, Bonato L, Dufresnes C, Lymberakis P, Kloas W, Ogielska M, Stöck M., Cytogenet Genome Res. January 1, 2014; 144 (4): 315-24.
Physiological responses of Xenopus laevis tadpoles exposed to cyanobacterial biomass containing microcystin-LR., Ziková A, Lorenz C, Lutz I, Pflugmacher S, Kloas W., Aquat Toxicol. March 15, 2013; 128-129 25-33.
Effects of environmentally relevant concentrations of the xeno-androgen, methyldihydrotestosterone, on male and female mating behavior in Xenopus laevis., Hoffmann F, Kloas W., Chemosphere. June 1, 2012; 87 (11): 1246-53.
The synthetic progestogen, Levonorgestrel, but not natural progesterone, affects male mate calling behavior of Xenopus laevis., Hoffmann F, Kloas W., Gen Comp Endocrinol. May 1, 2012; 176 (3): 385-90.
Estrogens can disrupt amphibian mating behavior., Hoffmann F, Kloas W., PLoS One. January 1, 2012; 7 (2): e32097.
The antiestrogens tamoxifen and fulvestrant abolish estrogenic impacts of 17α-ethinylestradiol on male calling behavior of Xenopus laevis., Hoffmann F, Kloas W., PLoS One. January 1, 2012; 7 (9): e44715.
The synthetic gestagen Levonorgestrel disrupts sexual development in Xenopus laevis by affecting gene expression of pituitary gonadotropins and gonadal steroidogenic enzymes., Lorenz C, Contardo-Jara V, Trubiroha A, Krüger A, Viehmann V, Wiegand C, Pflugmacher S, Nützmann G, Lutz I, Kloas W., Toxicol Sci. December 1, 2011; 124 (2): 311-9.
The synthetic gestagen levonorgestrel impairs metamorphosis in Xenopus laevis by disruption of the thyroid system., Lorenz C, Contardo-Jara V, Pflugmacher S, Wiegand C, Nützmann G, Lutz I, Kloas W., Toxicol Sci. September 1, 2011; 123 (1): 94-102.
Mate calling behavior of male South African clawed frogs (Xenopus laevis) is suppressed by the antiandrogenic endocrine disrupting compound flutamide., Behrends T, Urbatzka R, Krackow S, Elepfandt A, Kloas W., Gen Comp Endocrinol. September 1, 2010; 168 (2): 269-74.
Expression profiles of LHbeta, FSHbeta and their gonadal receptor mRNAs during sexual differentiation of Xenopus laevis tadpoles., Urbatzka R, Lorenz C, Lutz I, Kloas W., 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, Urbatzka R, Wiegand C, Pflugmacher S, Lutz I, Kloas W., Gen Comp Endocrinol. September 1, 2010; 168 (2): 245-55.
Aromatase mRNA expression in the brain of adult Xenopus laevis exposed to Lambro river water and endocrine disrupting compounds., Massari A, Urbatzka R, Cevasco A, Canesi L, Lanza C, Scarabelli L, Kloas W, Mandich A., Gen Comp Endocrinol. September 1, 2010; 168 (2): 262-8.
Developmental regulation of gene expression in the thyroid gland of Xenopus laevis tadpoles., Opitz R, Kloas W., Gen Comp Endocrinol. September 1, 2010; 168 (2): 199-208.
An environmentally relevant endocrine-disrupting antiandrogen, vinclozolin, affects calling behavior of male Xenopus laevis., Hoffmann F, Kloas W., Horm Behav. September 1, 2010; 58 (4): 653-9.
Effects of 17 beta-estradiol exposure on Xenopus laevis gonadal histopathology., Wolf JC, Lutz I, Kloas W, Springer TA, Holden LR, Krueger HO, Hosmer AJ., Environ Toxicol Chem. May 1, 2010; 29 (5): 1091-105.
Exposure of Xenopus laevis tadpoles to finasteride, an inhibitor of 5-alpha reductase activity, impairs spermatogenesis and alters hypophyseal feedback mechanisms., Urbatzka R, Watermann B, Lutz I, Kloas W., J Mol Endocrinol. November 1, 2009; 43 (5): 209-19.
Corticosteroids disrupt amphibian metamorphosis by complex modes of action including increased prolactin expression., Lorenz C, Opitz R, Lutz I, Kloas W., Comp Biochem Physiol C Toxicol Pharmacol. August 1, 2009; 150 (2): 314-21.
A critical analysis of the biological impacts of plasticizers on wildlife., Oehlmann J, Schulte-Oehlmann U, Kloas W, Jagnytsch O, Lutz I, Kusk KO, Wollenberger L, Santos EM, Paull GC, Van Look KJ, Tyler CR., Philos Trans R Soc Lond B Biol Sci. July 27, 2009; 364 (1526): 2047-62.
Teratogenic effects of chronic treatment with corticosterone on tadpoles of Xenopus laevis., Lorenz C, Opitz R, Lutz I, Kloas W., Ann N Y Acad Sci. April 1, 2009; 1163 454-6.
Does atrazine affect larval development and sexual differentiation of South African clawed frogs?, Kloas W, Lutz I, Urbatzka R, Springer T, Krueger H, Wolf J, Holden L, Hosmer A., Ann N Y Acad Sci. April 1, 2009; 1163 437-40.
Endocrine disrupting effects of herbicides and pentachlorophenol: in vitro and in vivo evidence., Orton F, Lutz I, Kloas W, Routledge EJ., Environ Sci Technol. March 15, 2009; 43 (6): 2144-50.
Does atrazine influence larval development and sexual differentiation in Xenopus laevis?, Kloas W, Lutz I, Springer T, Krueger H, Wolf J, Holden L, Hosmer A., Toxicol Sci. February 1, 2009; 107 (2): 376-84.
Perchlorate and ethylenethiourea induce different histological and molecular alterations in a non-mammalian vertebrate model of thyroid goitrogenesis., Opitz R, Schmidt F, Braunbeck T, Wuertz S, Kloas W., Mol Cell Endocrinol. January 27, 2009; 298 (1-2): 101-14.
Development, standardization and refinement of procedures for evaluating effects of endocrine active compounds on development and sexual differentiation of Xenopus laevis., Lutz I, Kloas W, Springer TA, Holden LR, Wolf JC, Krueger HO, Hosmer AJ., Anal Bioanal Chem. April 1, 2008; 390 (8): 2031-48.
Endocrine disrupting chemicals (EDC) with (anti)estrogenic and (anti)androgenic modes of action affecting reproductive biology of Xenopus laevis: II. Effects on gonad histomorphology., Cevasco A, Urbatzka R, Bottero S, Massari A, Pedemonte F, Kloas W, Mandich A., Comp Biochem Physiol C Toxicol Pharmacol. March 1, 2008; 147 (2): 241-51.
Endocrine disrupters with (anti)estrogenic and (anti)androgenic modes of action affecting reproductive biology of Xenopus laevis: I. Effects on sex steroid levels and biomarker expression., Urbatzka R, Bottero S, Mandich A, Lutz I, Kloas W., Comp Biochem Physiol C Toxicol Pharmacol. January 1, 2007; 144 (4): 310-8.
Aromatase, steroid-5-alpha-reductase type 1 and type 2 mRNA expression in gonads and in brain of Xenopus laevis during ontogeny., Urbatzka R, Lutz I, Kloas W., Gen Comp Endocrinol. January 1, 2007; 153 (1-3): 280-8.
Expression of sodium-iodide symporter mRNA in the thyroid gland of Xenopus laevis tadpoles: developmental expression, effects of antithyroidal compounds, and regulation by TSH., Opitz R, Trubiroha A, Lorenz C, Lutz I, Hartmann S, Blank T, Braunbeck T, Kloas W., J Endocrinol. July 1, 2006; 190 (1): 157-70.
Effects of tetrabromobisphenol A on larval development and thyroid hormone-regulated biomarkers of the amphibian Xenopus laevis., Jagnytsch O, Opitz R, Lutz I, Kloas W., Environ Res. July 1, 2006; 101 (3): 340-8.
Evaluation of histological and molecular endpoints for enhanced detection of thyroid system disruption in Xenopus laevis tadpoles., Opitz R, Hartmann S, Blank T, Braunbeck T, Lutz I, Kloas W., Toxicol Sci. April 1, 2006; 90 (2): 337-48.
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, Lutz I, Opitz R, Kloas W., Gen Comp Endocrinol. April 1, 2006; 146 (2): 119-25.
Analysis of thyroid hormone receptor betaA mRNA expression in Xenopus laevis tadpoles as a means to detect agonism and antagonism of thyroid hormone action., Opitz R, Lutz I, Nguyen NH, Scanlan TS, Kloas W., Toxicol Appl Pharmacol. April 1, 2006; 212 (1): 1-13.
Environmental signals: synthetic humic substances act as xeno-estrogen and affect the thyroid system of Xenopus laevis., Lutz I, Jie Z, Opitz R, Kloas W, Ying X, Menzel R, Steinberg CE., Chemosphere. December 1, 2005; 61 (8): 1183-8.
Regulation of estrogen receptors in primary cultured hepatocytes of the amphibian Xenopus laevis as estrogenic biomarker and its application in environmental monitoring., Lutz I, Blödt S, Kloas W., Comp Biochem Physiol C Toxicol Pharmacol. August 1, 2005; 141 (4): 384-92.
Description and initial evaluation of a Xenopus metamorphosis assay for detection of thyroid system-disrupting activities of environmental compounds., Opitz R, Braunbeck T, Bögi C, Pickford DB, Nentwig G, Oehlmann J, Tooi O, Lutz I, Kloas W., Environ Toxicol Chem. March 1, 2005; 24 (3): 653-64.
Estrogen-like effects of ultraviolet screen 3-(4-methylbenzylidene)-camphor (Eusolex 6300) on cell proliferation and gene induction in mammalian and amphibian cells., Klann A, Levy G, Lutz I, Müller C, Kloas W, Hildebrandt JP., Environ Res. March 1, 2005; 97 (3): 274-81.
Hormonelike effects of humic substances on fish, amphibians, and invertebrates., Steinberg CE, Höss S, Kloas W, Lutz I, Meinelt T, Pflugmacher S, Wiegand C., Environ Toxicol. August 1, 2004; 19 (4): 409-11.
Identification of angiotensin I in several vertebrate species: its structural and functional evolution., Takei Y, Joss JM, Kloas W, Rankin JC., Gen Comp Endocrinol. February 1, 2004; 135 (3): 286-92.
Retinol-binding protein as a biomarker to assess endocrine-disrupting compounds in the environment., Levy G, Lutz I, Krüger A, von Tümpling W, Kloas W., Anal Bioanal Chem. February 1, 2004; 378 (3): 676-83.
Bisphenol A induces feminization in Xenopus laevis tadpoles., Levy G, Lutz I, Krüger A, Kloas W., Environ Res. January 1, 2004; 94 (1): 102-11.

Impacts of the synthetic androgen Trenbolone on gonad differentiation and development - comparisons between three deeply diverged anuran families., Rozenblut-Kościsty B, Ogielska M, Hahn J, Kleemann D, Kossakowski R, Tamschick S, Schöning V, Krüger A, Lutz I, Lymberakis P, Kloas W, Stöck M., Sci Rep. July 3, 2019; 9 (1): 9623.

Endocrine disruption by environmental gestagens in amphibians - A short review supported by new in vitro data using gonads of Xenopus laevis., Ziková A, Lorenz C, Hoffmann F, Kleiner W, Lutz I, Stöck M, Kloas W., Chemosphere. August 1, 2017; 181 74-82.

Diclofenac can exhibit estrogenic modes of action in male Xenopus laevis, and affects the hypothalamus-pituitary-gonad axis and mating vocalizations., Efosa NJ, Kleiner W, Kloas W, Hoffmann F., Chemosphere. April 1, 2017; 173 69-77.

p,p'-Dichlordiphenyldichloroethylene (p,p'-DDE) can elicit antiandrogenic and estrogenic modes of action in the amphibian Xenopus laevis., Hoffmann F, Kloas W., Physiol Behav. December 1, 2016; 167 172-178.

The plasticizer bisphenol A affects somatic and sexual development, but differently in pipid, hylid and bufonid anurans., Tamschick S, Rozenblut-Kościsty B, Ogielska M, Kekenj D, Gajewski F, Krüger A, Kloas W, Stöck M., Environ Pollut. September 1, 2016; 216 282-291.

The synthetic gestagen levonorgestrel directly affects gene expression in thyroid and pituitary glands of Xenopus laevis tadpoles., Lorenz C, Opitz R, Trubiroha A, Lutz I, Zikova A, Kloas W., Aquat Toxicol. August 1, 2016; 177 63-73.

Impaired gonadal and somatic development corroborate vulnerability differences to the synthetic estrogen ethinylestradiol among deeply diverged anuran lineages., Tamschick S, Rozenblut-Kościsty B, Ogielska M, Lehmann A, Lymberakis P, Hoffmann F, Lutz I, Schneider RJ, Kloas W, Stöck M., Aquat Toxicol. August 1, 2016; 177 503-14.

Sex reversal assessments reveal different vulnerability to endocrine disruption between deeply diverged anuran lineages., Tamschick S, Rozenblut-Kościsty B, Ogielska M, Lehmann A, Lymberakis P, Hoffmann F, Lutz I, Kloas W, Stöck M., Sci Rep. March 31, 2016; 6 23825.

17α-Ethinylestradiol can disrupt hemoglobin catabolism in amphibians., Garmshausen J, Kloas W, Hoffmann F., Comp Biochem Physiol C Toxicol Pharmacol. May 1, 2015; 171 34-40.

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, Lorenz C, Wiedemann C, Lutz I, Kloas W., Comp Biochem Physiol C Toxicol Pharmacol. March 1, 2014; 160 1-8.

Sex chromosome conservation, DMRT1 phylogeny and gonad morphology in diploid Palearctic green toads (Bufo viridis subgroup)., Tamschick S, Rozenblut-Kościsty B, Bonato L, Dufresnes C, Lymberakis P, Kloas W, Ogielska M, Stöck M., Cytogenet Genome Res. January 1, 2014; 144 (4): 315-24.

Physiological responses of Xenopus laevis tadpoles exposed to cyanobacterial biomass containing microcystin-LR., Ziková A, Lorenz C, Lutz I, Pflugmacher S, Kloas W., Aquat Toxicol. March 15, 2013; 128-129 25-33.

Effects of environmentally relevant concentrations of the xeno-androgen, methyldihydrotestosterone, on male and female mating behavior in Xenopus laevis., Hoffmann F, Kloas W., Chemosphere. June 1, 2012; 87 (11): 1246-53.

The synthetic progestogen, Levonorgestrel, but not natural progesterone, affects male mate calling behavior of Xenopus laevis., Hoffmann F, Kloas W., Gen Comp Endocrinol. May 1, 2012; 176 (3): 385-90.

Estrogens can disrupt amphibian mating behavior., Hoffmann F, Kloas W., PLoS One. January 1, 2012; 7 (2): e32097.

The antiestrogens tamoxifen and fulvestrant abolish estrogenic impacts of 17α-ethinylestradiol on male calling behavior of Xenopus laevis., Hoffmann F, Kloas W., PLoS One. January 1, 2012; 7 (9): e44715.

The synthetic gestagen Levonorgestrel disrupts sexual development in Xenopus laevis by affecting gene expression of pituitary gonadotropins and gonadal steroidogenic enzymes., Lorenz C, Contardo-Jara V, Trubiroha A, Krüger A, Viehmann V, Wiegand C, Pflugmacher S, Nützmann G, Lutz I, Kloas W., Toxicol Sci. December 1, 2011; 124 (2): 311-9.

The synthetic gestagen levonorgestrel impairs metamorphosis in Xenopus laevis by disruption of the thyroid system., Lorenz C, Contardo-Jara V, Pflugmacher S, Wiegand C, Nützmann G, Lutz I, Kloas W., Toxicol Sci. September 1, 2011; 123 (1): 94-102.

Mate calling behavior of male South African clawed frogs (Xenopus laevis) is suppressed by the antiandrogenic endocrine disrupting compound flutamide., Behrends T, Urbatzka R, Krackow S, Elepfandt A, Kloas W., Gen Comp Endocrinol. September 1, 2010; 168 (2): 269-74.

Expression profiles of LHbeta, FSHbeta and their gonadal receptor mRNAs during sexual differentiation of Xenopus laevis tadpoles., Urbatzka R, Lorenz C, Lutz I, Kloas W., 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, Urbatzka R, Wiegand C, Pflugmacher S, Lutz I, Kloas W., Gen Comp Endocrinol. September 1, 2010; 168 (2): 245-55.

Aromatase mRNA expression in the brain of adult Xenopus laevis exposed to Lambro river water and endocrine disrupting compounds., Massari A, Urbatzka R, Cevasco A, Canesi L, Lanza C, Scarabelli L, Kloas W, Mandich A., Gen Comp Endocrinol. September 1, 2010; 168 (2): 262-8.

Developmental regulation of gene expression in the thyroid gland of Xenopus laevis tadpoles., Opitz R, Kloas W., Gen Comp Endocrinol. September 1, 2010; 168 (2): 199-208.

An environmentally relevant endocrine-disrupting antiandrogen, vinclozolin, affects calling behavior of male Xenopus laevis., Hoffmann F, Kloas W., Horm Behav. September 1, 2010; 58 (4): 653-9.

Effects of 17 beta-estradiol exposure on Xenopus laevis gonadal histopathology., Wolf JC, Lutz I, Kloas W, Springer TA, Holden LR, Krueger HO, Hosmer AJ., Environ Toxicol Chem. May 1, 2010; 29 (5): 1091-105.

Exposure of Xenopus laevis tadpoles to finasteride, an inhibitor of 5-alpha reductase activity, impairs spermatogenesis and alters hypophyseal feedback mechanisms., Urbatzka R, Watermann B, Lutz I, Kloas W., J Mol Endocrinol. November 1, 2009; 43 (5): 209-19.

Corticosteroids disrupt amphibian metamorphosis by complex modes of action including increased prolactin expression., Lorenz C, Opitz R, Lutz I, Kloas W., Comp Biochem Physiol C Toxicol Pharmacol. August 1, 2009; 150 (2): 314-21.

A critical analysis of the biological impacts of plasticizers on wildlife., Oehlmann J, Schulte-Oehlmann U, Kloas W, Jagnytsch O, Lutz I, Kusk KO, Wollenberger L, Santos EM, Paull GC, Van Look KJ, Tyler CR., Philos Trans R Soc Lond B Biol Sci. July 27, 2009; 364 (1526): 2047-62.

Teratogenic effects of chronic treatment with corticosterone on tadpoles of Xenopus laevis., Lorenz C, Opitz R, Lutz I, Kloas W., Ann N Y Acad Sci. April 1, 2009; 1163 454-6.

Does atrazine affect larval development and sexual differentiation of South African clawed frogs?, Kloas W, Lutz I, Urbatzka R, Springer T, Krueger H, Wolf J, Holden L, Hosmer A., Ann N Y Acad Sci. April 1, 2009; 1163 437-40.

Endocrine disrupting effects of herbicides and pentachlorophenol: in vitro and in vivo evidence., Orton F, Lutz I, Kloas W, Routledge EJ., Environ Sci Technol. March 15, 2009; 43 (6): 2144-50.

Does atrazine influence larval development and sexual differentiation in Xenopus laevis?, Kloas W, Lutz I, Springer T, Krueger H, Wolf J, Holden L, Hosmer A., Toxicol Sci. February 1, 2009; 107 (2): 376-84.

Perchlorate and ethylenethiourea induce different histological and molecular alterations in a non-mammalian vertebrate model of thyroid goitrogenesis., Opitz R, Schmidt F, Braunbeck T, Wuertz S, Kloas W., Mol Cell Endocrinol. January 27, 2009; 298 (1-2): 101-14.

Development, standardization and refinement of procedures for evaluating effects of endocrine active compounds on development and sexual differentiation of Xenopus laevis., Lutz I, Kloas W, Springer TA, Holden LR, Wolf JC, Krueger HO, Hosmer AJ., Anal Bioanal Chem. April 1, 2008; 390 (8): 2031-48.

Endocrine disrupting chemicals (EDC) with (anti)estrogenic and (anti)androgenic modes of action affecting reproductive biology of Xenopus laevis: II. Effects on gonad histomorphology., Cevasco A, Urbatzka R, Bottero S, Massari A, Pedemonte F, Kloas W, Mandich A., Comp Biochem Physiol C Toxicol Pharmacol. March 1, 2008; 147 (2): 241-51.

Endocrine disrupters with (anti)estrogenic and (anti)androgenic modes of action affecting reproductive biology of Xenopus laevis: I. Effects on sex steroid levels and biomarker expression., Urbatzka R, Bottero S, Mandich A, Lutz I, Kloas W., Comp Biochem Physiol C Toxicol Pharmacol. January 1, 2007; 144 (4): 310-8.

Aromatase, steroid-5-alpha-reductase type 1 and type 2 mRNA expression in gonads and in brain of Xenopus laevis during ontogeny., Urbatzka R, Lutz I, Kloas W., Gen Comp Endocrinol. January 1, 2007; 153 (1-3): 280-8.

Expression of sodium-iodide symporter mRNA in the thyroid gland of Xenopus laevis tadpoles: developmental expression, effects of antithyroidal compounds, and regulation by TSH., Opitz R, Trubiroha A, Lorenz C, Lutz I, Hartmann S, Blank T, Braunbeck T, Kloas W., J Endocrinol. July 1, 2006; 190 (1): 157-70.

Effects of tetrabromobisphenol A on larval development and thyroid hormone-regulated biomarkers of the amphibian Xenopus laevis., Jagnytsch O, Opitz R, Lutz I, Kloas W., Environ Res. July 1, 2006; 101 (3): 340-8.

Evaluation of histological and molecular endpoints for enhanced detection of thyroid system disruption in Xenopus laevis tadpoles., Opitz R, Hartmann S, Blank T, Braunbeck T, Lutz I, Kloas W., Toxicol Sci. April 1, 2006; 90 (2): 337-48.

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, Lutz I, Opitz R, Kloas W., Gen Comp Endocrinol. April 1, 2006; 146 (2): 119-25.

Analysis of thyroid hormone receptor betaA mRNA expression in Xenopus laevis tadpoles as a means to detect agonism and antagonism of thyroid hormone action., Opitz R, Lutz I, Nguyen NH, Scanlan TS, Kloas W., Toxicol Appl Pharmacol. April 1, 2006; 212 (1): 1-13.

Environmental signals: synthetic humic substances act as xeno-estrogen and affect the thyroid system of Xenopus laevis., Lutz I, Jie Z, Opitz R, Kloas W, Ying X, Menzel R, Steinberg CE., Chemosphere. December 1, 2005; 61 (8): 1183-8.

Regulation of estrogen receptors in primary cultured hepatocytes of the amphibian Xenopus laevis as estrogenic biomarker and its application in environmental monitoring., Lutz I, Blödt S, Kloas W., Comp Biochem Physiol C Toxicol Pharmacol. August 1, 2005; 141 (4): 384-92.

Description and initial evaluation of a Xenopus metamorphosis assay for detection of thyroid system-disrupting activities of environmental compounds., Opitz R, Braunbeck T, Bögi C, Pickford DB, Nentwig G, Oehlmann J, Tooi O, Lutz I, Kloas W., Environ Toxicol Chem. March 1, 2005; 24 (3): 653-64.

Estrogen-like effects of ultraviolet screen 3-(4-methylbenzylidene)-camphor (Eusolex 6300) on cell proliferation and gene induction in mammalian and amphibian cells., Klann A, Levy G, Lutz I, Müller C, Kloas W, Hildebrandt JP., Environ Res. March 1, 2005; 97 (3): 274-81.

Hormonelike effects of humic substances on fish, amphibians, and invertebrates., Steinberg CE, Höss S, Kloas W, Lutz I, Meinelt T, Pflugmacher S, Wiegand C., Environ Toxicol. August 1, 2004; 19 (4): 409-11.

Identification of angiotensin I in several vertebrate species: its structural and functional evolution., Takei Y, Joss JM, Kloas W, Rankin JC., Gen Comp Endocrinol. February 1, 2004; 135 (3): 286-92.

Retinol-binding protein as a biomarker to assess endocrine-disrupting compounds in the environment., Levy G, Lutz I, Krüger A, von Tümpling W, Kloas W., Anal Bioanal Chem. February 1, 2004; 378 (3): 676-83.

Bisphenol A induces feminization in Xenopus laevis tadpoles., Levy G, Lutz I, Krüger A, Kloas W., Environ Res. January 1, 2004; 94 (1): 102-11.

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