Related Experiment Video
Updated: Jun 2, 2026
10:09
Methods for Evaluating the Role of c-Fos and Dusp1 in Oncogene Dependence
Published on: January 7, 2019
Dual-specificity phosphatase DUSP6 has tumor-promoting properties in human glioblastomas
S Messina1, L Frati, C Leonetti
1Department of Pathology, IRCCS Neuromed, Pozzilli, Italy. samantha.messina@uniroma1.it
Oncogene
|April 19, 2011
Summary
Dual-specificity phosphatase 6 (DUSP6) promotes glioblastoma growth and chemoresistance. Upregulation of DUSP6 exacerbates the malignant phenotype, contrary to its tumor suppressor role. This study reveals DUSP6 as a potential therapeutic target.
Area of Science:
- Molecular Biology
- Oncology
- Cell Signaling
Background:
- Dual-specificity phosphatase 6 (DUSP6) regulates the ERK signaling pathway.
- DUSP6 has been previously implicated as a tumor suppressor.
- Glioblastoma exhibits chemoresistance, leading to poor patient outcomes.
Purpose of the Study:
- To investigate the role of DUSP6 in human glioblastomas.
- To determine the effect of DUSP6 expression on glioblastoma cell growth and chemoresistance.
Main Methods:
- Northern hybridization and real-time quantitative PCR to assess DUSP6 mRNA levels.
- Adenovirus-mediated DUSP6 overexpression in glioblastoma cultures.
- Functional assays for cell growth, morphology, and chemoresistance (cisplatin).
- Antisense-mediated depletion of DUSP6.
Main Results:
- DUSP6 is transcriptionally upregulated in human glioblastomas, leading to high protein expression.
- DUSP6 overexpression inhibited glioblastoma cell growth, induced G1-phase delay, and increased anchorage dependence and clonogenic potential.
- Increased DUSP6 expression enhanced resistance to cisplatin-induced cell death in vitro and in vivo.
- Depletion of DUSP6 sensitized glioblastoma cells to DNA-damaging drugs.
Conclusions:
- Upregulation of DUSP6 plays a tumor-promoting role in human glioblastomas.
- DUSP6 exacerbates the malignant phenotype, including growth and chemoresistance.
- DUSP6 represents a potential therapeutic target for glioblastoma treatment.
Related Concept Videos
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...
01:12Loss 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...
03:03mTOR 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...
The mTOR pathway or the...
01:20The Retinoblastoma Gene
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.
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...