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Estrogen receptors alpha and beta in bone

Aysha B Khalid1, Susan A Krum1

  • 1Department of Orthopaedic Surgery and Biomedical Engineering, University of Tennessee Health Science Center, Memphis, TN, United States.

Bone
|April 14, 2016
PubMed

Insights

Estrogens regulate bone metabolism through estrogen receptors alpha (ERα) and ERβ. These receptors antagonize each other, impacting bone mineral density and overall bone health.

Area of Science:

  • Endocrinology
  • Bone Biology
  • Molecular Biology

Background:

  • Estrogens play a crucial role in maintaining bone mineral density through various cellular mechanisms.
  • Estrogen receptors, specifically ERα and ERβ, mediate these effects.
  • The distinct roles of ERα and ERβ are increasingly understood via genetic knockout models.

Purpose of the Study:

  • To review the functions of ERα and ERβ in bone metabolism.
  • To emphasize the antagonistic relationship between ERα and ERβ in bone tissue.

Main Methods:

  • Review of in vitro and in vivo experimental data.
  • Analysis of findings from whole body and tissue-specific receptor knockout studies.

Main Results:

  • Estrogen receptor alpha (ERα) and estrogen receptor beta (ERβ) have distinct and often opposing roles in bone.
  • Evidence from knockout studies demonstrates a functional antagonism between ERα and ERβ in bone.
  • This antagonism influences cellular processes critical for bone metabolism.

Conclusions:

  • ERα and ERβ exhibit antagonistic interactions within the bone microenvironment.
  • Understanding this antagonism is key to comprehending estrogen's complex regulation of bone metabolism.
  • Further research into ERα/ERβ antagonism may reveal therapeutic targets for bone diseases.
Keywords:
BoneEstrogenEstrogen receptor alpha (ERα, ESR1)Estrogen receptor beta (ERβ, ESR2)

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