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Advances in the roles of ATF4 in osteoporosis

Yaosheng Xiao1, Xunlu Xie2, Zhixi Chen3

  • 1Department of Orthopaetics, First Affiliated Hospital of Gannan Medical University, Ganzhou 341000, China.

Biomedicine & Pharmacotherapy = Biomedecine & Pharmacotherapie
|November 10, 2023
PubMed

Insights

Activating transcription factor 4 (ATF4) is crucial for bone health, promoting bone formation and inhibiting osteoporosis. Targeting ATF4 offers a promising therapeutic strategy for treating osteoporosis and maintaining bone homeostasis.

Area of Science:

  • Molecular biology
  • Cell biology
  • Biochemistry

Background:

  • Osteoporosis (OP) is a condition marked by low bone mass and increased fracture risk.
  • Activating transcription factor 4 (ATF4) regulates key cellular processes including differentiation, metabolism, and apoptosis.
  • ATF4 influences bone metabolism by modulating osteoblast and osteoclast activity.

Purpose of the Study:

  • To comprehensively review the biological activities of ATF4 in maintaining bone homeostasis.
  • To explore ATF4's role in inhibiting osteoporosis development.
  • To highlight ATF4 as a potential therapeutic target for OP.

Main Methods:

  • Literature review of studies on ATF4 and bone metabolism.
  • Analysis of ATF4's interactions with other factors (e.g., RUNX2, OCN, Osx).
  • Examination of signaling pathways regulating ATF4 (e.g., Wnt/β-catenin, BMP2/Smad).

Main Results:

  • ATF4 promotes osteoblast differentiation and activity while inhibiting osteoclast formation.
  • ATF4 regulates osteoblast energy metabolism and promotes angiogenesis.
  • ATF4 interacts with RUNX2 to up-regulate key bone formation markers like OCN and Osx.

Conclusions:

  • ATF4 plays a multifaceted role in maintaining bone homeostasis and preventing osteoporosis.
  • Modulation of ATF4 activity presents a viable therapeutic avenue for osteoporosis treatment.
  • Further research into ATF4-targeting agents could lead to novel OP therapies.
Keywords:
ATF4Bone remodelingOsteoblastOsteoclastOsteogenic differentiationOsteoporosis

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