Navigation Links
Physical and functional interaction of key cell growth molecules linked to cancer

Scientists have uncovered new information about a specific mechanism involved in the biology of malignant human tumor cells. The findings, published in the June issue of Cancer Cell, significantly advance knowledge about epidermal growth factor receptor (EGFR).

EGFR is a well-studied cell surface receptor that stimulates cell growth by transmitting growth factor signals acting outside the cell. EGFR is often present at abnormally elevated levels in human cancer cells. Increased EGFR activity has been linked to metastasis and treatment resistance for aggressive human tumors and, as a result, the EGFR has been identified as an attractive target for cancer therapeutics. However, the precise role of EGFR in cancer cell biology has remained elusive.

Recent studies have shown that in response to growth factor stimulation, a fraction of EGFR molecules move from the cell membrane into the nucleus, where the genetic material of the cell is located. These research studies suggest that EGFR itself probably does not directly regulate gene expression, but may interact with other as yet unidentified molecules in the nucleus. A better understanding of the role of the EGFR signaling pathway in the progression of cancer will be useful for development of new anticancer therapeutics.

In the current study, Dr. Mien-Chie Hung and colleagues from the Department of Molecular and Cellular Oncology at the University of Texas M.D. Anderson Cancer Center found that EGFR interacts with STAT3 in the cell nucleus. STAT3 is a molecule that is known to bind to DNA and directly regulate gene expression. STAT3 has also been shown to have a major role in oncogenesis. Importantly, interaction with STAT3 provides a mechanism for EGFR-driven regulation of gene transcription. The researchers also discovered that the EGFR/STAT3 interaction leads increased expression of inducible nitric oxide synthase (iNOS). Although elevated iNOS is also a key characteristic of many human malignanc ies, there has previously been no direct connection made between EGFR and the iNOS/NO pathway.

The researchers conclude that the complex formed by EGFR and STAT3 can directly regulate gene expression and provides a new transcriptional mechanism that may play a significant role in human cancers, transducing cell signals from outside the cell into the nucleus. According to Dr. Hung, "As in OS serves as a direct target of the identified EGFR/STAT3 transcriptional complex, the deregulated iNOS/NO pathway may, in part, contribute to the malignant biology of tumor cells with high levels of nuclear EGFR and STAT3." This research may open new avenues for designing anticancer therapies against EGFR, STAT3, and iNOS/NO.


'"/>

Source:Cell Press


Related biology news :

1. Towards precise classification of cancers based on robust gene functional expression profiles
2. Bone marrow cells can become functional gut lining cells
3. Virus-host interactions at sea effect global photosynthesis
4. Future diabetes drugs may target new protein interaction
5. Computational verification of protein-protein interactions by orthologous co-expression
6. Confirmation of human protein interaction data by human expression data
7. Complex gene interactions account for autism risk
8. Image of myosin-actin interaction revealed in cover story of Molecular Cell
9. A real time look at interactions between RNA and proteins
10. U of MN researchers develop way to visualize synchronized interactions of nerve cells in the brain
11. Biologists visualize protein interaction that may initiate viral infection
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:4/15/2016)... -- A new partnership announced today will help life ... a fraction of the time it takes today, ... insurance policies to consumers without requiring inconvenient and ... rapid testing (A1C, Cotinine and HIV) and higi,s ... pulse, BMI, and activity data) available at local ...
(Date:4/13/2016)... 13, 2016  IMPOWER physicians supporting Medicaid patients in ... new clinical standard in telehealth thanks to a new ... higi platform, IMPOWER patients can routinely track key health ... mass index, and, when they opt in, share them ... to a local retail location at no cost. By ...
(Date:3/29/2016)... Florida , March 29, 2016 ... the "Company") LegacyXChange "LEGX" and SelectaDNA/CSI Protect are pleased ... in ink used in a variety of writing instruments, ... Buyers of originally created collectibles from athletes on LegacyXChange ... forensic analysis of the DNA. Bill ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... -- Liquid Biotech USA , Inc. ... Research Agreement with The University of Pennsylvania ("PENN") ... patients.  The funding will be used to assess ... outcomes in cancer patients undergoing a variety of ... to support the design of a therapeutic, decision-making ...
(Date:6/24/2016)... ... June 24, 2016 , ... While the majority of commercial spectrophotometers ... 5000 and the 6000i models are higher end machines that use the more unconventional ... spectrophotometer’s light beam from the bottom of the cuvette holder. , FireflySci has ...
(Date:6/23/2016)...   Boston Biomedical , an industry leader ... target cancer stemness pathways, announced that its lead ... Designation from the U.S. Food and Drug Administration ... gastroesophageal junction (GEJ) cancer. Napabucasin is an orally ... stemness pathways by targeting STAT3, and is currently ...
(Date:6/23/2016)... ... June 23, 2016 , ... Charm Sciences, Inc. is ... has received AOAC Research Institute approval 061601. , “This is another AOAC-RI approval ... Bob Salter, Vice President of Regulatory and Industrial Affairs. “The Peel Plate methods ...
Breaking Biology Technology: