Related Experiment Video

Updated: Jun 15, 2026

Deficient Pms2, ERCC1, Ku86, CcOI in Field Defects During Progression to Colon Cancer
28:15

Deficient Pms2, ERCC1, Ku86, CcOI in Field Defects During Progression to Colon Cancer

Published on: July 28, 2010

STAT2 contributes to promotion of colorectal and skin carcinogenesis

Ana M Gamero1, Matthew R Young, Roycelynn Mentor-Marcel

  • 1Temple University School of Medicine, Philadelphia, PA 19140, USA. gameroa@temple.edu

Cancer Prevention Research (Philadelphia, Pa.)
|March 18, 2010
PubMed

Insights

Signal transducer and activator of transcription 2 (STAT2) was found to promote, not prevent, cancer. Deleting STAT2 inhibited colorectal and skin carcinogenesis by reducing inflammatory mediators and STAT3 activation.

Area of Science:

  • Immunology
  • Oncology
  • Molecular Biology

Background:

  • Signal transducer and activator of transcription 2 (STAT2) is crucial for type I interferon signaling, impacting antiviral immunity and cell growth.
  • STAT2 is uniquely activated by interferons (IFNs), which have dual roles in inflammation and proliferation.
  • The role of STAT2 in inflammation-induced carcinogenesis was previously unexplored.

Purpose of the Study:

  • To investigate the role of STAT2 in preventing or promoting inflammation-induced colorectal and skin carcinogenesis.
  • To elucidate the underlying mechanisms by which STAT2 influences carcinogenesis.

Main Methods:

  • Utilized azoxymethane/dextran sodium sulfate (DSS) induced colorectal cancer model in mice.
  • Employed 7,12-dimethylbenz(a)anthracene/12-O-tetradecanoylphorbol-13-acetate (DMBA/TPA) induced skin cancer model in mice.
  • Assessed tumor incidence, size, multiplicity, survival rates, and levels of inflammatory mediators (IL-6, CCL2) and STAT3 activation.

Main Results:

  • STAT2 deficiency significantly inhibited colorectal carcinogenesis, evidenced by increased survival, reduced adenoma incidence, smaller polyps, and less chronic inflammation.
  • STAT2 deletion also suppressed skin carcinogenesis, indicated by reduced papilloma multiplicity.
  • STAT2 deficiency decreased the expression and release of proinflammatory mediators (IL-6, CCL2) and reduced STAT3 activation in both cancer models.

Conclusions:

  • STAT2 acts as a novel promoter of colorectal and skin carcinogenesis, contrary to initial hypotheses.
  • STAT2 may promote cancer by upregulating proinflammatory mediators, which subsequently activate the oncogenic STAT3 pathway.

More Related Videos

Chemical-Induced Skin Carcinogenesis Model Using Dimethylbenz[a]Anthracene and 12-O-Tetradecanoyl Phorbol-13-Acetate (DMBA-TPA)04:12

Chemical-Induced Skin Carcinogenesis Model Using Dimethylbenz[a]Anthracene and 12-O-Tetradecanoyl Phorbol-13-Acetate (DMBA-TPA)

Published on: December 19, 2019

In vitro Organoid Culture of Primary Mouse Colon Tumors07:33

In vitro Organoid Culture of Primary Mouse Colon Tumors

Published on: May 17, 2013

Related Concept Videos

Mutagenicity and Carcinogenicity01:25

Mutagenicity and Carcinogenicity

Mutagenicity and carcinogenicity refer to the ability of drugs to cause genetic defects and induce cancer, respectively. The International Agency for Research on Cancer (IARC) classifies agents into four groups based on their carcinogenic potential. Group 1 agents are known human carcinogens; group 2A agents are probably carcinogenic to humans; group 3 agents lack data to support their role in carcinogenesis; and group 4 includes agents for which data support that they are not likely to be...
Skin Cancer01:30

Skin Cancer

Skin cancer is a type of cancer that occurs when there is an abnormal growth of skin cells, usually triggered by damage to the DNA within the skin cells. It is primarily caused by exposure to ultraviolet (UV) radiation from the sun or artificial sources like tanning beds. Skin cancer is the most common type of cancer worldwide, and its incidence continues to rise.
Basal Cell Carcinoma (BCC): BCC is the most common type of skin cancer, accounting for about 80% of cases. It typically develops in...
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...
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...
Tumor Progression02:07

Tumor Progression

Tumor progression is a phenomenon where the pre-formed tumor acquires successive mutations to become clinically more aggressive and malignant. In the 1950s, Foulds first described the stepwise progression of cancer cells through successive stages.
Colon cancer is one of the best-documented examples of tumor progression. Early mutation in the APC gene in colon cells causes a small growth on the colon wall called a polyp. With time, this polyp grows into a benign, pre-cancerous tumor. Further...