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Related Concept Videos

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Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
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Osteoclasts are cells responsible for bone resorption and remodeling. They originate from hematopoietic progenitor cells present in the bone marrow. Numerous progenitor cells fuse to form multinucleated cells, each with 10-20 nuclei. A single osteoclast has a diameter of 150 to 200 µM. These cells have ruffled borders that break down the underlying bone tissue and release minerals such as calcium into the blood in bone resorption. Osteoclasts cling to bones with their ruffled edges during...
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Updated: Jun 3, 2025

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Osteoporosis and stroke: a bidirectional mendelian randomization study.

Miao He1, Haochuan Yong1, Zhidong Cao1

  • 1Department of Orthopedic Surgery, Chongqing Emergency Medical Center (Chongqing University Central Hospital), Jiankang Road 1, Chongqing, 400010, China.

Journal of Bone and Mineral Metabolism
|January 10, 2025
PubMed
Summary
This summary is machine-generated.

This study found no direct causal link between osteoporosis and stroke using Mendelian randomization. While direct genetic causation is absent, secondary effects may still connect these conditions.

Keywords:
Genome-wide association studyMendelian randomizationOsteoporosisStroke

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Area of Science:

  • Genetics
  • Epidemiology
  • Public Health

Background:

  • Observational studies suggest a link between osteoporosis and stroke.
  • The causal genetic relationship between osteoporosis and stroke remains unclear.
  • This study investigates the bidirectional causal relationship using genetic data.

Purpose of the Study:

  • To determine if osteoporosis causally influences stroke risk.
  • To ascertain if stroke causally influences osteoporosis risk.
  • To investigate the genetic basis of the osteoporosis-stroke relationship.

Main Methods:

  • Two-sample Mendelian randomization (MR) approach.
  • Utilized genome-wide association study (GWAS) data for osteoporosis and stroke.
  • Employed inverse-variance weighted (IVW), MR-Egger, and median-weighted methods for causal inference.

Main Results:

  • No significant bidirectional causal relationship was found between osteoporosis and stroke or its subtypes.
  • Sensitivity analyses confirmed the robustness and stability of the findings.
  • Results were consistent regardless of pleiotropic single nucleotide polymorphism (SNP) inclusion.

Conclusions:

  • There is no direct causal genetic relationship between osteoporosis and stroke in either direction.
  • While direct causation is absent, secondary effects may link these conditions.
  • Findings contribute to understanding the complex interplay between bone health and cerebrovascular disease.