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Lamins and bone disorders: current understanding and perspectives.

Chiara Gargiuli1, Elisa Schena1,2, Elisabetta Mattioli1,2

  • 1CNR Institute of Molecular Genetics, Unit of Bologna, Bologna, Italy.

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|June 2, 2018
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Summary

Lamin A/C protein dysfunction causes laminopathies, leading to bone diseases like scoliosis and osteolysis. Understanding its role in bone turnover may reveal new treatments for rare bone disorders.

Keywords:
LMNA-related congenital muscular dystrophy (L-CMD)bone turnoverhutchinson-gilford progeria syndrome (HGPS)lamin A/Cmandibuloacral dysplasia (MADA, MADB)

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Area of Science:

  • Cell Biology
  • Genetics
  • Orthopedics

Background:

  • Lamin A/C is crucial for nuclear lamina structure and function.
  • Laminopathies are genetic disorders linked to Lamin A/C, often causing severe skeletal abnormalities.
  • Specific bone sites are disproportionately affected in various laminopathies.

Purpose of the Study:

  • To review current knowledge on laminopathies affecting bone.
  • To elucidate the role of Lamin A/C in bone turnover.
  • To highlight therapeutic opportunities for bone disorders.

Main Methods:

  • Literature review of laminopathies and bone abnormalities.
  • Analysis of Lamin A/C's involvement in osteoclastogenesis pathways.
  • Examination of specific bone districts affected in laminopathies.

Main Results:

  • Lamin A/C mutations activate non-canonical osteoclastogenesis pathways, such as TGF-beta 2.
  • Distinct bone regions exhibit specific pathologies in different laminopathies.
  • Lamin A/C plays a regulatory role in bone turnover mechanisms.

Conclusions:

  • Lamin A/C is a key regulator of bone turnover.
  • Understanding Lamin A/C's role offers potential therapeutic targets for laminopathies and other rare bone diseases.
  • Further research into lamin-dependent bone mechanisms is warranted.