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Related Experiment Videos

Androgen receptors in bone-forming tissue.

B Noble1, J Routledge, H Stevens

  • 1University of Cambridge School of Clinical Medicine (Bone Research Group), Level 4, Addenbrooke's Hospital, Cambridge, UK.

Hormone Research
|March 30, 1999
PubMed
Summary

Androgen receptors (AR) are present in human growth plates and osteoblasts. AR translocation to the nucleus in osteoblasts may depend on differentiation and culture conditions.

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Area of Science:

  • Endocrinology
  • Cell Biology
  • Orthopedics

Background:

  • Androgen receptors (AR) play a role in various physiological processes.
  • Understanding AR localization and function in bone cells is crucial for skeletal development and health.

Purpose of the Study:

  • To investigate the presence and localization of androgen receptors in human growth plate chondrocytes and osteoblasts.
  • To examine the translocation of AR into the nucleus of osteoblasts in response to androgens.

Main Methods:

  • Immunohistochemical staining of AR in human growth plate sections and cultured osteoblasts.
  • Culturing human osteoblasts with androgens (5alpha-dihydrotestosterone, methyltrienolone) and assessing AR localization via microscopy.

Main Results:

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  • AR were predominantly found in the cytoplasm of chondrocytes in the human growth plate.
  • Osteoblasts and osteocytes exhibited numerous AR, primarily in the cytoplasm.
  • Androgen stimulation induced AR translocation into the nucleus in osteoblasts from some, but not all, specimens.

Conclusions:

  • Androgen receptors are present in human growth plate chondrocytes and osteoblasts.
  • Osteoblasts derived from osteoarthritic patients show AR translocation to the nucleus upon androgen exposure.
  • The capacity for AR nuclear translocation in osteoblasts may be influenced by cellular differentiation and culture conditions.