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Related Experiment Videos

Attenuating trabecular morphology associated with low magnesium diet evaluated using micro computed tomography.

Shu-Ju Tu1,2, Shun-Ping Wang3,4, Fu-Chou Cheng5

  • 1Department of Medical Imaging and Radiological Sciences, College of Medicine, Chang Gung University, Tao-Yuan, Taiwan.

Plos One
|April 4, 2017
PubMed
Summary

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A low-magnesium diet negatively impacts bone health, reducing bone mineral density and altering trabecular bone structure in mouse femurs. This study quantifies these detrimental effects using micro-CT analysis.

Area of Science:

  • Biochemistry
  • Orthopedics
  • Nutrition Science

Background:

  • Inadequate dietary magnesium (Mg) intake is linked to compromised bone mineral density (BMD) and altered femoral trabecular bone architecture.
  • Microcomputed tomography (micro-CT) is a valuable tool for detailed analysis of bone structure.

Purpose of the Study:

  • To characterize and quantify the impact of a low-magnesium diet on femoral trabecular bone in mice using micro-CT.
  • To assess changes in BMD and trabecular bone morphology under low-Mg dietary conditions.

Main Methods:

  • Male C57BL/6J mice (4 weeks old) were fed normal or low-Mg diets for 8 weeks.
  • Femur tissues were analyzed using micro-CT, and plasma/urine samples underwent biochemical analysis.
  • Computational algorithms were employed to assess morphological characteristics of trabecular bone, treated as cylindrical rods.

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Main Results:

  • Low-Mg diet significantly reduced total tissue volume, bone volume, percent bone volume, fractal dimension, trabecular segment number, connecting nodes, bone mineral content, and BMD.
  • The structural model index and surface-area-to-volume ratio increased in low-Mg mice.
  • Plasma Mg and Ca levels decreased by 43% and 40%, respectively, with significant urinary excretion changes.

Conclusions:

  • Micro-CT analysis revealed a reduced population of femoral trabecular bones and decreased BMD in the distal metaphysis of low-Mg mice.
  • Despite structural alterations, the average length and radius of individual trabecular segments remained comparable between low-Mg and normal diet groups.