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Developing animal models for analyzing SERM activity
1Receptor Biology Section, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina 27709, USA.
Abstract:
Estrogens have effects on many organ systems, beyond the reproductive system, in both females and males. Estrogen effects are exerted through specific receptors, of which there are two types: estrogen receptor (ER) alpha and estrogen receptor (ER) beta. To study the roles of each receptor in vivo, a series of mice were generated lacking either a functional ER alpha or ER beta or both. These mice, labeled alphaERKO, betaERKO, or alphabetaERKO, respectively, have been useful in defining the tissue specificities, localization, and functions of each of the estrogen receptors. These mouse models also show great promise for use in defining the effectiveness of putative SERMs.
Insights
Researchers studied estrogen receptor (ER) alpha and ER beta functions using genetically engineered mice lacking these receptors. These models help understand ER roles in various tissues and evaluate potential drugs.
Area of Science:
- Endocrinology and Molecular Biology
- Reproductive Medicine and Hormone Research
Background:
- Estrogens exert widespread effects across multiple organ systems in both sexes.
- Estrogen signaling is mediated by two primary receptors: estrogen receptor (ER) alpha and estrogen receptor (ER) beta.
Purpose of the Study:
- To elucidate the distinct in vivo roles of ER alpha and ER beta.
- To establish a foundation for evaluating selective estrogen receptor modulators (SERMs).
Main Methods:
- Generation of genetically modified mouse models: alphaERKO (lacking ER alpha), betaERKO (lacking ER beta), and alphabetaERKO (lacking both).
Main Results:
- These mouse models have been instrumental in defining tissue-specific functions and localization of ER alpha and ER beta.
- The models provide a platform for investigating the physiological impact of estrogen receptor signaling pathways.
Conclusions:
- The developed ER knockout mouse models are crucial tools for dissecting the complex roles of estrogen receptors.
- These models hold significant potential for preclinical assessment of novel SERMs and understanding estrogen-mediated processes.