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Related Experiment Video

Updated: Apr 26, 2026

A RANKL-based Osteoclast Culture Assay of Mouse Bone Marrow to Investigate the Role of mTORC1 in Osteoclast Formation
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[Bone metastasis and RANKL].

Tomoki Nakashima1

  • 1Department of Cell Signaling, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Japan./Japan Science and Technology Agency (JST) , Precursory Research for Embryonic Science and Technology (PRESTO).

Clinical Calcium
|July 29, 2014
PubMed
Summary
This summary is machine-generated.

The RANK/RANKL system is vital for mammary gland development and breast cancer. Disrupting RANK or RANKL impacts pregnancy and can prevent tumor growth and metastasis.

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Area of Science:

  • Oncology
  • Developmental Biology
  • Cell Biology

Context:

  • The RANK/RANKL signaling pathway plays a critical role in mammary gland development and homeostasis.
  • Dysregulation of this pathway is implicated in breast cancer initiation and progression.
  • Hormone replacement therapy is linked to increased breast cancer risk, highlighting the need to understand hormonal influences on mammary tumorigenesis.

Purpose:

  • To investigate the role of the RANK/RANKL system in mammary gland development, breast cancer, and metastasis.
  • To determine the effect of RANK deletion in mammary epithelial cells on tumorigenesis and cancer stem cell self-renewal.
  • To evaluate the impact of RANKL-mediated cell migration and bone metastasis.

Summary:

  • Mice lacking RANK or RANKL show normal pubertal mammary development but impaired lobuloalveolar formation during pregnancy, leading to neonatal death.
  • Specific deletion of RANK in mammary epithelial cells inhibits medroxyprogesterone acetate (MPA)-induced mammary cancer onset and progression, and impairs breast cancer stem cell self-renewal.
  • RANKL promotes directed migration of mammary epithelial, prostate cancer, and melanoma cells.
  • Osteoprotegerin (OPG) reduced bone tumor burden and paralysis in vivo but did not alter metastasis frequency to other tissues.

Impact:

  • The RANK/RANKL system is essential for normal mammary development.
  • Targeting the RANK/RANKL pathway presents a potential therapeutic strategy for breast cancer and bone metastasis.
  • Understanding RANK/RANKL signaling is crucial for developing novel treatments for hormone-driven breast cancers.