Related Experiment Video

Updated: Aug 16, 2026

Systems Biology of Metabolic Regulation by Estrogen Receptor Signaling in Breast Cancer
10:36

Systems Biology of Metabolic Regulation by Estrogen Receptor Signaling in Breast Cancer

Published on: March 17, 2016

Estrogen receptor beta in health and disease

Otabek Imamov1, Gil-Jin Shim, Margaret Warner

  • 1Department of Biosciences and Medical Nutrition, Novum, Karolinska Institute, Karolinska University Hospital, Huddinge, SE-141 86 Sweden.

Biology of Reproduction
|July 22, 2005
PubMed

Insights

Estrogen receptors ER alpha and ER beta regulate many bodily functions. Understanding their distinct roles and developing targeted therapies could lead to new treatments for various conditions.

Area of Science:

  • Endocrinology
  • Molecular Biology
  • Pharmacology

Background:

  • Estrogens exert broad physiological effects via two receptors: ER alpha (ESR1) and ER beta (ESR2).
  • These receptors influence reproductive, skeletal, cardiovascular, hematological, and neurological systems.
  • Dysfunctional estrogen signaling is implicated in conditions like polycystic ovarian syndrome, obesity, and infertility.

Purpose of the Study:

  • To investigate the distinct physiological roles of ER alpha and ER beta.
  • To explore the therapeutic potential of targeting specific estrogen receptor subtypes.

Main Methods:

  • Analysis of phenotypes in genetically modified mice lacking ER alpha, ER beta, or both.
  • Review of current therapeutic applications of estrogen agonists and antagonists.

Main Results:

  • Inactivation of ER alpha or ER beta in mice leads to specific developmental and physiological defects.
  • ER beta deficiency is associated with defective ovulation, mimicking polycystic ovarian syndrome.
  • ER alpha deficiency results in obesity, insulin resistance, and infertility in both sexes.

Conclusions:

  • ER alpha and ER beta possess distinct functions crucial for normal physiology.
  • Differences in receptor structure allow for selective ligand binding.
  • Development of selective estrogen receptor modulators targeting specific ER subtypes offers therapeutic promise.

More Related Videos

Profiling of Estrogen-regulated MicroRNAs in Breast Cancer Cells16:24

Profiling of Estrogen-regulated MicroRNAs in Breast Cancer Cells

Published on: February 21, 2014

Related Concept Videos

Transducer Mechanism: Nuclear Receptors01:31

Transducer Mechanism: Nuclear Receptors

Nuclear receptors, or NRs, are unique transcription factors that regulate gene transcription and affect the cellular pathways involved in reproduction, development, or metabolism. Their ability to be stimulated by small lipophilic ligands and control vital cellular processes makes them ideal drug targets. Nearly 10-15% of currently prescribed drugs target these receptors.
About 48 different soluble family members of nuclear receptors are identified that can be divided into two main classes:
Intracellular Hormone Receptors01:08

Intracellular Hormone Receptors

Lipid-soluble hormones diffuse across the plasma and nuclear membrane of target cells to bind to their specific intracellular receptors. These receptors act as transcription factors that regulate gene expression and protein synthesis in the target cell
Receptor Downregulation in MVBs01:15

Receptor Downregulation in MVBs

Multivesicular bodies (MVBs) are mature endosomes that sort ubiquitinated proteins and then fuse with lysosomes to degrade the sorted proteins. Epidermal growth factor (EGF) and its receptor (EGFR) form a complex that can be internalized through endocytosis, sorted into an MVB, and later degraded.
The EGFR can initiate signaling pathways that  lead to cell proliferation, migration, and differentiation. Overexpression of EGFR  stimulates cells to proliferate. Excessive  EGFR activation may...
Role of ER in the Secretory Pathway01:17

Role of ER in the Secretory Pathway

Eukaryotic cells have a special pathway that enables communication between various intracellular membrane-bound compartments and also with the extracellular environment. This pathway is termed as the secretory pathway.
Components of the secretory pathway
About a third of proteins synthesized in the cell are sorted via the secretory route. They shuffle between different compartments in membrane-bound vesicles until they reach their final destination. The main intracellular compartments involved...
Mitogens and the Cell Cycle02:38

Mitogens and the Cell Cycle

Mitogens and their receptors play a crucial role in controlling the progression of the cell cycle. However, the loss of mitogenic control over cell division leads to tumor formation. Therefore, mitogens and mitogen receptors play an important role in cancer research. For instance, the epidermal growth factor (EGF) - a type of mitogen and its transmembrane receptor (EGFR), decides the fate of the cell's proliferation. When EGF binds to EGFR, a member of the ErbB family of tyrosine kinase...
Transducer Mechanism: Enzyme-Linked Receptors01:27

Transducer Mechanism: Enzyme-Linked Receptors

Enzyme-linked receptors are cell-surface receptors acting as an enzyme or associating with an enzyme intracellularly. They make excellent drug targets. Drugs can bind to the extracellular ligand-binding domain or directly affect their enzymatic domain and alter their activity.
Major types that are helpful drug targets include: