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Related Experiment Videos

Increased bone resorption during the first year after stroke

Y Sato1, H Kuno, M Kaji

  • 1Department of Neurology, Kurume University Medical Center, Japan. y-sato@ktarn.or.jp

Stroke
|July 11, 1998
PubMed
Summary
This summary is machine-generated.

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Stroke survivors experience bone density loss on the affected side. Early bone loss is linked to increased resorption from immobilization, while later loss is influenced by hemiplegia severity and vitamin D levels.

Area of Science:

  • Orthopedics
  • Neurology
  • Metabolic Bone Disease

Background:

  • Stroke frequently leads to significant bone mineral density (BMD) reduction on the hemiplegic side.
  • Understanding the mechanisms behind this bone loss is crucial for preventing fractures in stroke survivors.

Purpose of the Study:

  • To investigate the pathogenesis of reduced BMD in stroke patients with hemiplegia.
  • To compare bone metabolism markers and BMD in early (within 1 year) and long-term (1-2 years) post-stroke groups.

Main Methods:

  • Serum samples from 51 early and 93 long-term hemiplegic stroke patients were analyzed.
  • Bone resorption marker (pyridinoline cross-linked carboxy-terminal telopeptide of type I collagen - ICTP) and bone formation marker (bone Gla protein) were measured.
  • Bone mineral density (BMD) z scores were determined in the second metacarpals.

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Main Results:

  • Serum ICTP levels were significantly higher in the early group compared to the long-term group.
  • Multiple regression identified factors like Barthel Index and hemiplegia severity influencing ICTP in both groups.
  • Significant correlations were found between BMD z scores and various factors including illness duration, Barthel Index, 25-hydroxyvitamin D (25-OHD), and ICTP.

Conclusions:

  • The pathogenesis of osteopenia differs between early and long-term stroke phases.
  • In the early phase, immobilization-induced bone resorption is a key factor.
  • In the long-term phase, hemiplegia severity and 25-OHD levels are primary determinants of osteopenia.