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MPP8 Promotes Proliferation and Restrains Apoptosis in Osteosarcoma by Regulating p38αMAPK Pathway

Tao Li1, Na Li2, Lei Wang1

  • 1Department of Orthopaedic Ward 3, Qinghai Provincial People's Hospital, Xining City, Qinghai Province, China.

Technology in Cancer Research & Treatment
|February 18, 2021
PubMed

Insights

M-phase phosphoprotein 8 (MPP8) promotes osteosarcoma growth by increasing cell proliferation and inhibiting apoptosis. Inhibiting MPP8 may offer a therapeutic strategy for this common bone cancer.

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Osteosarcoma is the most common primary bone cancer.
  • Understanding the molecular mechanisms driving osteosarcoma progression is crucial for developing effective treatments.

Purpose of the Study:

  • To investigate the role of M-phase phosphoprotein 8 (MPP8) in osteosarcoma (OS) tumorigenesis.
  • To explore the potential of targeting MPP8 for therapeutic intervention in osteosarcoma.

Main Methods:

  • In vitro study using osteosarcoma cell lines (U2OS and Saos-2).
  • MPP8 expression levels were analyzed in tumor tissues and cell lines.
  • MPP8 knockdown using shRNA and overexpression were performed.
  • Cell viability, proliferation, and apoptosis assays were conducted.
  • Protein levels of HOXA5 and p38αMAPK were assessed.

Main Results:

  • MPP8 expression was significantly upregulated in osteosarcoma tissues and cell lines.
  • MPP8 knockdown inhibited cell viability and proliferation while promoting apoptosis.
  • MPP8 overexpression enhanced proliferation and suppressed apoptosis.
  • MPP8 overexpression reduced HOXA5 and p38αMAPK protein levels.
  • HOXA5 overexpression counteracted the effects of MPP8 overexpression on proliferation and apoptosis.

Conclusions:

  • MPP8 acts as a promoter of osteosarcoma cell proliferation and survival.
  • MPP8 may contribute to osteosarcoma development through the HOXA5/p38αMAPK pathway.
  • Targeting MPP8 presents a potential therapeutic strategy for osteosarcoma treatment.
Keywords:
M-phase phosphoprotein 8apoptosisosteosarcomapathwayproliferation

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