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Selective estrogen receptor modulators (SERMs) for the brain: current status and remaining challenges for developing
Liqin Zhao1, Kathleen O'Neill, Roberta Diaz Brinton
1Department of Molecular Pharmacology and Toxicology and the Program in Neuroscience, School of Pharmacy, University of Southern California, Pharmaceutical Sciences Center, Los Angeles, CA 90089, USA.
Abstract:
Multiple issues regarding the efficacy of estrogen action in the brain remain unresolved. These include the timing, formulation and duration of the therapy intervention. Moreover, issues of thrombotic and neoplastic risks must be factored into the design of estrogen alternatives developed to prevent age-associated neurodegenerative disorders, as well as other climacteric symptoms such as hot flush and sleep dysfunction. One strategy to address these issues is to develop molecules that selectively target and activate estrogen mechanisms of action in the brain while avoiding activation of estrogen receptors peripheral to the brain, particularly in reproductive organs. An overview of recent advances in our understanding of the molecular mechanisms of estrogen action is discussed in the context of designing an efficacious NeuroSERM that will activate cellular, biochemical and genomic events required for the promotion of memory function and neuronal survival. Pharmacological analyses of estrogen receptor subtypes and the case for a membrane-associated estrogen receptor splice variant in mediating these mechanisms are provided along with a summary of the activation profiles of existing clinically relevant estrogen alternatives or SERMs in neurons. Results of these endeavors have yielded insights into strategies for developing novel molecules with NeuroSERM potential in order to prevent brain related climacteric symptoms and neurodegenerative diseases.
Insights
Developing novel neuroestrogen selective estrogen receptor modulators (NeuroSERMs) offers a promising strategy to enhance brain health and prevent neurodegenerative diseases. These targeted therapies aim to improve memory and neuronal survival while minimizing risks associated with traditional estrogen therapies.
Area of Science:
- Neuroscience
- Endocrinology
- Pharmacology
Background:
- Efficacy of estrogen action in the brain presents unresolved challenges, including optimal therapy timing, formulation, and duration.
- Thrombotic and neoplastic risks necessitate careful consideration in developing estrogen alternatives for neurodegenerative disorders and climacteric symptoms.
- Selective targeting of brain estrogen mechanisms is crucial to avoid peripheral side effects, particularly in reproductive organs.
Purpose of the Study:
- To review recent advances in estrogen action mechanisms for designing effective Neuro-SERMs.
- To explore strategies for developing molecules that promote memory function and neuronal survival.
- To identify novel approaches for preventing brain-related climacteric symptoms and neurodegenerative diseases.
Main Methods:
- Overview of molecular mechanisms of estrogen action.
- Pharmacological analysis of estrogen receptor subtypes.
- Evaluation of existing selective estrogen receptor modulators (SERMs) in neurons.
Main Results:
- Insights into designing efficacious NeuroSERMs that activate specific cellular, biochemical, and genomic events in the brain.
- Understanding the role of estrogen receptor subtypes and a potential membrane-associated splice variant in mediating estrogenic effects.
- Identification of strategies for developing novel molecules with NeuroSERM potential.
Conclusions:
- Novel molecules with NeuroSERM potential can be developed to selectively target brain estrogen mechanisms.
- These targeted therapies may prevent brain-related climacteric symptoms and neurodegenerative diseases.
- Further research into selective estrogen receptor modulation is vital for brain health.
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