High expression of NEK2 promotes gastric cancer progression via activating AKT signaling

Hao Wan1, Lin Xu2, Huangbin Zhang1

  • 1Department of General Surgery, The First Affiliated Hospital of Nanchang University, No.17 Yongwaizheng Street, Donghu District, Nanchang, 330006, Jiangxi, China.

Insights

Never in mitosis gene A-related kinase 2 (NEK2) drives gastric cancer by activating AKT pathways. NEK2 overexpression promotes tumor growth and impairs treatment response, suggesting NEK2 as a therapeutic target.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • Never in mitosis gene A-related kinase 2 (NEK2) is an identified oncogene in various cancers.
  • Gastric cancer, prevalent in Eastern Asia, has a poor prognosis, and NEK2's role remains unclear.
  • Understanding NEK2's function in gastric cancer is crucial for developing effective treatments.

Purpose of the Study:

  • To investigate the association between NEK2 and gastric cancer development and progression.
  • To elucidate the molecular mechanisms by which NEK2 influences gastric cancer.
  • To explore NEK2 as a potential therapeutic target for gastric cancer.

Main Methods:

  • Investigated NEK2 expression levels in gastric cancer patients.
  • Examined the interaction between NEK2 and protein phosphatase 1 (PP1).
  • Analyzed the activation of AKT signaling pathways and downstream targets (HIF1α, mTOR) upon NEK2 modulation.
  • Assessed the impact of NEK2 on glucose metabolism and autophagy.
  • Evaluated the effects of NEK2 silencing on gastric cancer cell growth and treatment response.

Main Results:

  • NEK2 is overexpressed in gastric cancer, correlating with larger tumor size and lymph node metastasis.
  • NEK2 overexpression inhibits PP1, leading to AKT activation and downstream oncogenic signaling.
  • The AKT/HIF1α axis promotes aerobic glycolysis for cancer cell energy.
  • The AKT/mTOR axis suppresses autophagy, enhancing cell survival and treatment resistance.
  • NEK2 silencing reduces aerobic glycolysis, induces autophagic cell death, and inhibits tumor growth.

Conclusions:

  • NEK2 promotes gastric cancer progression through AKT-mediated activation of oncogenic pathways.
  • NEK2 influences glucose metabolism and autophagy in gastric cancer cells.
  • Targeting NEK2 offers a potential therapeutic strategy for gastric cancer treatment.

Related Concept Videos

mTOR Signaling and Cancer Progression03:03

mTOR Signaling and Cancer Progression

The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
4.2K
Mitogens and the Cell Cycle02:38

Mitogens and the Cell Cycle

Mitogens and their receptors play a crucial role in controlling the progression of the cell cycle. However, the loss of mitogenic control over cell division leads to tumor formation. Therefore, mitogens and mitogen receptors play an important role in cancer research. For instance, the epidermal growth factor (EGF) - a type of mitogen and its transmembrane receptor (EGFR), decides the fate of the cell's proliferation. When EGF binds to EGFR, a member of the ErbB family of tyrosine kinase...
7.4K
PI3K/mTOR/AKT Signaling Pathway01:22

PI3K/mTOR/AKT Signaling Pathway

The mammalian target of rapamycin  (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1  (mTORC1) and mTOR complex 2  (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast,  mTORC2 consists of a...
4.8K
Role Of Notch Signalling In Intestinal Stem Cell Renewal01:12

Role Of Notch Signalling In Intestinal Stem Cell Renewal

Notch signaling was first discovered in Drosophila melanogaster, where it is involved in cell lineage differentiation. Notch signaling regulates the maintenance and differentiation of intestinal stem cells or ISCs by controlling the expression of atonal homolog 1 or Atoh1. Atoh1 directs cells to differentiate into secretory cells.
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...
2.3K
MAPK Signaling Cascades01:07

MAPK Signaling Cascades

Mitogen-activated protein kinase, or MAPK pathway, activates three sequential kinases to regulate cellular responses such as proliferation, differentiation, survival, and apoptosis. The canonical MAPK pathway starts with a mitogen or growth factor binding to an RTK. The activated RTKs stimulate Ras, which recruits Raf or MAP3 Kinase (MAPKKK), the first kinase of the MAPK signaling cascade. Raf further phosphorylates and activates MEK or MAP2 Kinases (MAPKK), which in turn phosphorylates MAP...
7.4K
Interactions Between Signaling Pathways01:19

Interactions Between Signaling Pathways

Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
6.9K