Cathy Richter, PhD
Dr. Cathy Richter is a Research Molecular Biologist at the Columbia Environmental Research Center.
Science and Products
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ECALS: Loading studies interim report October 2013 ECALS: Loading studies interim report October 2013
Here we follow up the loading studies interim report from July 2013 and include results from laboratory studies assessing the effects of diet on eDNA shedding rates by bigheaded carps(silver and bighead carp). In order to understand how eDNA behavesin the environment, we must understand how it enters the system. In our July interim report, we addressed three of our four hypotheses that...
Authors
Katy Klymus, Cathy Richter, Duane Chapman, Craig P. Paukert
ECALS: Loading studies interim report July 2013 ECALS: Loading studies interim report July 2013
Since the initial detection of Asian carp moving up the Mississippi Basin, the potential for invasion of the Great Lakes by Silver Carp and Bighead Carp has been a major concern to stakeholders. To combat this problem, sampling for environmental DNA (eDNA) is used to monitor the waterways near Lake Michigan. This monitoring area includes the Chicago Area Waterways System (CAWS) and the...
Authors
Katy E. Klymus, Cathy A. Richter, Duane Chapman, Craig P. Paukert
Identification of the thiamin pyrophosphokinase gene in rainbow trout: Characteristic structure and expression of seven splice variants in tissues and cell lines and during embryo development Identification of the thiamin pyrophosphokinase gene in rainbow trout: Characteristic structure and expression of seven splice variants in tissues and cell lines and during embryo development
Thiamin pyrophosphokinase (TPK) converts thiamin to its active form, thiamin diphosphate. In humans, TPK expression is down-regulated in some thiamin deficiency related syndrome, and enhanced during pregnancy. Rainbow trout are also vulnerable to thiamin deficiency in wild life and are useful models for thiamin metabolism research. We identified the tpk gene transcript including seven...
Authors
Shinya Yuge, Catherine A. Richter, Maureen K. Wright-Osment, Diane Nicks, Stephanie K. Saloka, Donald E. Tillitt, Weiming Li
Paenibacillus thiaminolyticus is not the cause of thiamine deficiency impeding lake trout (Salvelinus namaycush) recruitment in the Great Lakes Paenibacillus thiaminolyticus is not the cause of thiamine deficiency impeding lake trout (Salvelinus namaycush) recruitment in the Great Lakes
Thiamine (vitamin B1) deficiency is a global concern affecting wildlife, livestock, and humans. In Great Lakes salmonines, thiamine deficiency causes embryo mortality and is an impediment to restoration of native lake trout (Salvelinus namaycush) stocks. Thiamine deficiency in fish may result from a diet of prey with high levels of thiaminase I. The discoveries that the bacterial species
Authors
Catherine A. Richter, Allison N. Evans, Maureen K. Wright-Osment, James L. Zajicek, Scott A. Heppell, Stephen C. Riley, Charles C. Krueger, Donald E. Tillitt
Gene expression changes in female zebrafish (Danio rerio) brain in response to acute exposure to methylmercury Gene expression changes in female zebrafish (Danio rerio) brain in response to acute exposure to methylmercury
Methylmercury (MeHg) is a potent neurotoxicant and endocrine disruptor that accumulates in aquatic systems. Previous studies have shown suppression of hormone levels in both male and female fish, suggesting effects on gonadotropin regulation in the brain. The gene expression profile in adult female zebrafish whole brain induced by acute (96 h) MeHg exposure was investigated. Fish were...
Authors
Catherine A. Richter, Natàlia Garcia-Reyero, Chris Martyniuk, Iris Knoebl, Marie Pope, Maureen K. Wright-Osment, Nancy D. Denslow, Donald E. Tillitt
Atrazine reduces reproduction in fathead minnow (Pimephales promelas) Atrazine reduces reproduction in fathead minnow (Pimephales promelas)
Atrazine, the widely used herbicide, has shown to affect the hypothalamus–pituitary–gonad axis in certain vertebrate species, but few studies have examined reproductive effects of this chemical on fish. Our study was designed to evaluate a population endpoint (egg production) in conjunction with histological (e.g., gonad development) and biochemical (e.g., hormone production) phenotypes...
Authors
Donald E. Tillitt, Diana M. Papoulias, Jeffrey J. Whyte, Catherine A. Richter
Non-USGS Publications**
Taylor, J.A., Richter, C.A., Suzuki, A., Watanabe, H., Iguchi, T., Coser, K.R., Shioda, T., and vom Saal, F.S., 2012, Dose-related estrogen effects on gene expression in fetal mouse prostate mesenchymal cells: PLOS ONE, v. 7, no. 10, p. e48311
Taylor, J.A., Richter, C.A., Ruhlen, R.L., and vom Saal, F.S., 2011, Estrogenic environmental chemicals and drugs: Mechanisms for effects on the developing male urogenital system: The Journal of Steroid Biochemistry and Molecular Biology, v. 127, no. 1, p. 83-95
Richter, C.A., Taylor, J.A., Ruhlen, R.L., Welshons, W.V., and vom Saal, F.S., 2007, Estradiol and Bisphenol A stimulate androgen receptor and estrogen receptor gene expression in fetal mouse prostate mesenchyme cells: Environmental Health Perspectives, v. 115, no. 6, p. 902-908
vom Saal, F.S., Richter, C.A., Mao, J., and Welshons, W.V., 2005, Commercial animal feed: Variability in estrogenic activity and effects on body weight in mice: Birth Defects Research Part A: Clinical and Molecular Teratology, v. 73, no. 7, p. 474-475
Timms, B.G., Howdeshell, K.L., Barton, L., Bradley, S., Richter, C.A., and vom Saal, F.S., 2005, Estrogenic chemicals in plastic and oral contraceptives disrupt development of the fetal mouse prostate and urethra: Proceedings of the National Academy of Sciences of the United States of America, v. 102, no. 19, p. 7014-7019
Richter, C., Timms, B., and vom Saal, F., 2005, Prostate development: mechanisms for opposite effects of low and high doses of estrogenic chemicals, in Naz, R., ed., Endocrine Disruptors: Effects on Male and Female Reproductive Systems: New York, CRC Press, p. 379-410.
vom Saal, F.S., Richter, C.A., Ruhlen, R.R., Nagel, S.C., Timms, B.G., and Welshons, W.V., 2005, The importance of appropriate controls, animal feed, and animal models in interpreting results from low-dose studies of bisphenol A: Birth Defects Research Part A: Clinical and Molecular Teratology, v. 73, no. 3, p. 140-145
vom Saal, F.S., Richter, C.A., Ruhlen, R.R., Nagel, S.C., and Welshons, W.V., 2004, Disruption of laboratory experiments due to leaching of Bisphenol A from polycarbonate cages and bottles and uncontrolled variability in components of animal feed, in National Research Council, ed., The Development of Science-based Guidelines for Laboratory Animal Care: Proceedings of the November 2003 International Workshop: The National Academies Press, p. 65-69.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 25
No Result Found
Filter Total Items: 49
ECALS: Loading studies interim report October 2013 ECALS: Loading studies interim report October 2013
Here we follow up the loading studies interim report from July 2013 and include results from laboratory studies assessing the effects of diet on eDNA shedding rates by bigheaded carps(silver and bighead carp). In order to understand how eDNA behavesin the environment, we must understand how it enters the system. In our July interim report, we addressed three of our four hypotheses that...
Authors
Katy Klymus, Cathy Richter, Duane Chapman, Craig P. Paukert
ECALS: Loading studies interim report July 2013 ECALS: Loading studies interim report July 2013
Since the initial detection of Asian carp moving up the Mississippi Basin, the potential for invasion of the Great Lakes by Silver Carp and Bighead Carp has been a major concern to stakeholders. To combat this problem, sampling for environmental DNA (eDNA) is used to monitor the waterways near Lake Michigan. This monitoring area includes the Chicago Area Waterways System (CAWS) and the...
Authors
Katy E. Klymus, Cathy A. Richter, Duane Chapman, Craig P. Paukert
Identification of the thiamin pyrophosphokinase gene in rainbow trout: Characteristic structure and expression of seven splice variants in tissues and cell lines and during embryo development Identification of the thiamin pyrophosphokinase gene in rainbow trout: Characteristic structure and expression of seven splice variants in tissues and cell lines and during embryo development
Thiamin pyrophosphokinase (TPK) converts thiamin to its active form, thiamin diphosphate. In humans, TPK expression is down-regulated in some thiamin deficiency related syndrome, and enhanced during pregnancy. Rainbow trout are also vulnerable to thiamin deficiency in wild life and are useful models for thiamin metabolism research. We identified the tpk gene transcript including seven...
Authors
Shinya Yuge, Catherine A. Richter, Maureen K. Wright-Osment, Diane Nicks, Stephanie K. Saloka, Donald E. Tillitt, Weiming Li
Paenibacillus thiaminolyticus is not the cause of thiamine deficiency impeding lake trout (Salvelinus namaycush) recruitment in the Great Lakes Paenibacillus thiaminolyticus is not the cause of thiamine deficiency impeding lake trout (Salvelinus namaycush) recruitment in the Great Lakes
Thiamine (vitamin B1) deficiency is a global concern affecting wildlife, livestock, and humans. In Great Lakes salmonines, thiamine deficiency causes embryo mortality and is an impediment to restoration of native lake trout (Salvelinus namaycush) stocks. Thiamine deficiency in fish may result from a diet of prey with high levels of thiaminase I. The discoveries that the bacterial species
Authors
Catherine A. Richter, Allison N. Evans, Maureen K. Wright-Osment, James L. Zajicek, Scott A. Heppell, Stephen C. Riley, Charles C. Krueger, Donald E. Tillitt
Gene expression changes in female zebrafish (Danio rerio) brain in response to acute exposure to methylmercury Gene expression changes in female zebrafish (Danio rerio) brain in response to acute exposure to methylmercury
Methylmercury (MeHg) is a potent neurotoxicant and endocrine disruptor that accumulates in aquatic systems. Previous studies have shown suppression of hormone levels in both male and female fish, suggesting effects on gonadotropin regulation in the brain. The gene expression profile in adult female zebrafish whole brain induced by acute (96 h) MeHg exposure was investigated. Fish were...
Authors
Catherine A. Richter, Natàlia Garcia-Reyero, Chris Martyniuk, Iris Knoebl, Marie Pope, Maureen K. Wright-Osment, Nancy D. Denslow, Donald E. Tillitt
Atrazine reduces reproduction in fathead minnow (Pimephales promelas) Atrazine reduces reproduction in fathead minnow (Pimephales promelas)
Atrazine, the widely used herbicide, has shown to affect the hypothalamus–pituitary–gonad axis in certain vertebrate species, but few studies have examined reproductive effects of this chemical on fish. Our study was designed to evaluate a population endpoint (egg production) in conjunction with histological (e.g., gonad development) and biochemical (e.g., hormone production) phenotypes...
Authors
Donald E. Tillitt, Diana M. Papoulias, Jeffrey J. Whyte, Catherine A. Richter
Non-USGS Publications**
Taylor, J.A., Richter, C.A., Suzuki, A., Watanabe, H., Iguchi, T., Coser, K.R., Shioda, T., and vom Saal, F.S., 2012, Dose-related estrogen effects on gene expression in fetal mouse prostate mesenchymal cells: PLOS ONE, v. 7, no. 10, p. e48311
Taylor, J.A., Richter, C.A., Ruhlen, R.L., and vom Saal, F.S., 2011, Estrogenic environmental chemicals and drugs: Mechanisms for effects on the developing male urogenital system: The Journal of Steroid Biochemistry and Molecular Biology, v. 127, no. 1, p. 83-95
Richter, C.A., Taylor, J.A., Ruhlen, R.L., Welshons, W.V., and vom Saal, F.S., 2007, Estradiol and Bisphenol A stimulate androgen receptor and estrogen receptor gene expression in fetal mouse prostate mesenchyme cells: Environmental Health Perspectives, v. 115, no. 6, p. 902-908
vom Saal, F.S., Richter, C.A., Mao, J., and Welshons, W.V., 2005, Commercial animal feed: Variability in estrogenic activity and effects on body weight in mice: Birth Defects Research Part A: Clinical and Molecular Teratology, v. 73, no. 7, p. 474-475
Timms, B.G., Howdeshell, K.L., Barton, L., Bradley, S., Richter, C.A., and vom Saal, F.S., 2005, Estrogenic chemicals in plastic and oral contraceptives disrupt development of the fetal mouse prostate and urethra: Proceedings of the National Academy of Sciences of the United States of America, v. 102, no. 19, p. 7014-7019
Richter, C., Timms, B., and vom Saal, F., 2005, Prostate development: mechanisms for opposite effects of low and high doses of estrogenic chemicals, in Naz, R., ed., Endocrine Disruptors: Effects on Male and Female Reproductive Systems: New York, CRC Press, p. 379-410.
vom Saal, F.S., Richter, C.A., Ruhlen, R.R., Nagel, S.C., Timms, B.G., and Welshons, W.V., 2005, The importance of appropriate controls, animal feed, and animal models in interpreting results from low-dose studies of bisphenol A: Birth Defects Research Part A: Clinical and Molecular Teratology, v. 73, no. 3, p. 140-145
vom Saal, F.S., Richter, C.A., Ruhlen, R.R., Nagel, S.C., and Welshons, W.V., 2004, Disruption of laboratory experiments due to leaching of Bisphenol A from polycarbonate cages and bottles and uncontrolled variability in components of animal feed, in National Research Council, ed., The Development of Science-based Guidelines for Laboratory Animal Care: Proceedings of the November 2003 International Workshop: The National Academies Press, p. 65-69.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.