Related Experiment Video

Updated: Aug 8, 2026

Combined Conditional Knockdown and Adapted Sphere Formation Assay to Study a Stemness-Associated Gene of Patient-derived Gastric Cancer Stem Cells
09:24

Combined Conditional Knockdown and Adapted Sphere Formation Assay to Study a Stemness-Associated Gene of Patient-derived Gastric Cancer Stem Cells

Published on: May 9, 2020

KCNE2, a down-regulated gene identified by in silico analysis, suppressed proliferation of gastric cancer cells

Pan Yanglin1, Zhao Lina, Liu Zhiguo

  • 1State Key Laboratory of Cancer Biology and Institute of Digestive Diseases, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi Province, PR China.

Cancer Letters
|May 9, 2006
PubMed

Insights

Identifying key genes in stomach cancer is crucial. This study found that KCNE2 (potassium channel protein) is down-regulated in gastric cancer and suppresses tumor growth and proliferation.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Gastric cancer (stomach cancer) pathogenesis involves complex molecular alterations.
  • Identifying differentially expressed genes is vital for understanding tumorigenesis and finding therapeutic targets.

Purpose of the Study:

  • To identify novel genes involved in gastric cancer development using in silico methods.
  • To investigate the role of the down-regulated potassium channel protein KCNE2 in gastric cancer progression.

Main Methods:

  • In silico analysis to identify 38 differentially expressed genes between gastric cancer and normal tissues.
  • Investigated KCNE2 expression in gastric cancer tissues and cell lines.
  • Examined the effect of KCNE2 overexpression on gastric cancer cell proliferation, cell cycle, soft agar colony formation, and in vivo tumorigenicity.

Main Results:

  • KCNE2 expression was significantly down-regulated in gastric cancer tissues and cell lines.
  • Forced overexpression of KCNE2 suppressed SGC7901 cell proliferation and cell cycle progression, potentially via down-regulation of Cyclin D1.
  • KCNE2 inhibited SGC7901 cell growth in soft agar and reduced tumor formation in nude mice.

Conclusions:

  • In silico approaches are effective for identifying cancer-related genes.
  • KCNE2 acts as a tumor suppressor in gastric cancer by inhibiting cell proliferation and tumorigenesis.
  • KCNE2 represents a potential novel therapeutic target for stomach cancer.

Related Concept Videos

Cancer-Critical Genes II: Tumor Suppressor Genes01:05

Cancer-Critical Genes II: Tumor Suppressor Genes

Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
Cancer-Critical Genes II: Tumor Suppressor Genes01:05

Cancer-Critical Genes II: Tumor Suppressor Genes

Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
Receptor Downregulation in MVBs01:15

Receptor Downregulation in MVBs

Multivesicular bodies (MVBs) are mature endosomes that sort ubiquitinated proteins and then fuse with lysosomes to degrade the sorted proteins. Epidermal growth factor (EGF) and its receptor (EGFR) form a complex that can be internalized through endocytosis, sorted into an MVB, and later degraded.
The EGFR can initiate signaling pathways that  lead to cell proliferation, migration, and differentiation. Overexpression of EGFR  stimulates cells to proliferate. Excessive  EGFR activation may...
Abnormal Proliferation02:23

Abnormal Proliferation

Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the daughter...
Loss of Tumor Suppressor Gene Functions01:12

Loss of Tumor Suppressor Gene Functions

Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
When the tumor suppressor genes develop mutations or are lost, cells start growing out of control, leading to cancer. However, a single functional copy of the tumor suppressor gene is enough for the cells to maintain their normal functions and cell...
Cell Specific Gene Expression01:58

Cell Specific Gene Expression

Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...