Estrogen and estrogen receptors mediate the mechanobiology of bone disease and repair.
Level 5 - mechanism / opinion, no new human data
Narrative review of mechanistic biological pathways without systematic review methodology or new clinical data.
PubMed 39106937 · doi:10.1016/j.bone.2024.117220
What was done
This narrative review summarizes literature regarding the role of estrogen and estrogen receptors (ERs) in bone mechanobiology. It examines how estrogen signaling interacts with mechanical loading pathways (including integrins, Wnt/beta-catenin, RhoA/ROCK, and YAP/TAZ) in osteocytes, osteoblasts, osteoclasts, and marrow stromal cells, and explores implications for managing osteoporosis and bone fractures.
What was found
The abstract reports no quantitative data or numerical outcomes. It describes qualitative mechanistic findings showing that estrogen and ERs augment cellular mechanosensitivity and mechanotransduction across multiple bone cell lineages, modulating bone formation and repair under mechanical stimulus.
Why it matters
Clarifying the interaction between biochemical estrogen signaling and physical loading provides a mechanistic rationale for combined interventions, such as high-impact exercise alongside targeted or localized hormone delivery, to optimize bone fragility management.
Limits
As a narrative review, it lacks a systematic literature search, risk-of-bias assessment, or pooled quantitative effect sizes. The abstract presents no original experimental or clinical trial data, and optimal mechanical or hormonal dosing parameters for humans are not established.
Cited by
- context Ceasing estrogen replacement therapy results in a rapid decline in bone mineral density because estrogen is the primary transducing signal that couples mechanical bone loading to osteoblast and osteoclast activity.