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MKRN2 inhibits the proliferation of gastric cancer by downregulating PKM2

Zheng Liu1, Shuyao Xiang2, Xingchen Guo1

  • 1The Second Hospital of Lanzhou University, Lanzhou 730000, P.R. China.

Aging
|February 23, 2022
PubMed

Insights

The E3 ubiquitin-protein MKRN2 is down-regulated in gastric cancer, inhibiting cell proliferation and indicating poor prognosis. MKRN2 may serve as a potential therapeutic target for gastric cancer.

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Dysfunction of ubiquitinating enzymes is linked to various diseases, including cancer.
  • The specific role of ubiquitinating enzymes in gastric cancer pathogenesis is not well understood.

Purpose of the Study:

  • To investigate the role of the E3 ubiquitin-protein MKRN2 in gastric cancer.
  • To determine if MKRN2 expression levels correlate with patient prognosis and tumor progression.

Main Methods:

  • Bioinformatics analysis of gastric cancer tissues.
  • Experimental validation including cell proliferation assays (in vitro and in vivo).
  • Analysis of MKRN2's mechanism involving PKM2 ubiquitination and ERK signaling.

Main Results:

  • MKRN2 was found to be significantly down-regulated in gastric cancer tissues.
  • Low MKRN2 expression correlated with poor patient prognosis.
  • Overexpression of MKRN2 inhibited gastric cancer cell proliferation, while knockdown promoted it.
  • MKRN2 facilitates the ubiquitination-mediated degradation of PKM2, thereby attenuating its effect on ERK.

Conclusions:

  • MKRN2 plays a suppressive role in gastric cancer progression.
  • MKRN2 functions by promoting PKM2 degradation, impacting the ERK pathway.
  • MKRN2 represents a potential therapeutic target for gastric cancer treatment.
Keywords:
ERKMKRN2PKM2gastric cancerproliferation

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