Related Experiment Video
Updated: Jul 6, 2026
10:09
Methods for Evaluating the Role of c-Fos and Dusp1 in Oncogene Dependence
Published on: January 7, 2019
Tumor suppressor FUS1 signaling pathway
1Section of Thoracic Molecular Oncology, Department of Thoracic and Cardiovascular Surgery, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77230-1402, USA. lji@mdanderson.org
Summary
The FUS1 tumor suppressor gene, often lost in lung cancer, can inhibit tumor growth by inducing apoptosis and blocking key kinases. Nanoparticle delivery of FUS1 shows promise for lung cancer treatment.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- FUS1 is a tumor suppressor gene located in the 3p21.3 region, frequently altered in various cancers.
- Reduced FUS1 expression is observed in most lung cancers and premalignant lesions.
- FUS1 deficiency is linked to early genetic alterations in tumorigenesis.
Purpose of the Study:
- To investigate the role of FUS1 in lung cancer.
- To elucidate the mechanisms by which FUS1 inhibits tumor growth.
- To evaluate the therapeutic potential of FUS1 gene delivery using nanoparticles.
Main Methods:
- Restoration of wild-type FUS1 (wt-FUS1) in non-small cell lung carcinoma (NSCLC) cells.
- Analysis of apoptosis induction and cell cycle kinetics.
- Assessment of FUS1's effect on protein tyrosine kinases (EGFR, PDGFR, AKT, c-Abl, c-Kit).
- In vivo studies using nanoparticle-encapsulated FUS1 plasmid in orthotopic human lung cancer xenograft models.
Main Results:
- wt-FUS1 expression significantly inhibited NSCLC cell growth.
- FUS1 induced apoptosis via intrinsic mitochondrial and Apaf-1-associated pathways.
- FUS1 suppressed the activity of multiple protein tyrosine kinases.
- Nanoparticle-mediated FUS1 delivery demonstrated antitumor effects in vivo.
Conclusions:
- FUS1 functions as a tumor suppressor by promoting apoptosis and inhibiting key oncogenic kinases.
- FUS1 nanoparticle gene delivery is a viable strategy for treating lung cancer.
- This approach forms the basis for an ongoing clinical trial.
Related Concept Videos
01:19Interactions 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...
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...
02:23Abnormal 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...
01:05Cancer-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...
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...
01:05Cancer-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...
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...
01:12Loss 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...
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...
01:12Loss 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...
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...