Navigation Links
Targeting leukemia cell's gene 'addiction' presents new strategy for treatment
Date:3/3/2010

An international team of scientists studying acute forms of Leukaemia have identified a new drug target to inhibit the genes which are vital for the growth of diseased cells. The research, reported in EMBO Molecular Medicine, reveals how leukaemia cells become 'addicted' to genes, which if targeted could prevent diseased cells from developing.

The team, led by Dr Veronika Sexl from the University of Vienna, carried out their research on acute lymphoid leukaemia (ALL) and chronic myelogenous leukaemia (CML), which can both be caused by fusion protein, Bcr-Abl, created through the joining of two or more genes originally coded for separate proteins.

This joining of genes results in a complex tumor supporting 'network' which supports the growth and survival of the leukaemic cells. Inhibitor drugs such as 'Imatinib' can block vital signals and lead to leukemia cell death, but there are several mutations which can resist these inhibitors, making them ineffective.

As an alternative strategy the team investigated transcription factors Stat3 and Stat5 which are linked to bcr/abl-induced transformation. The team tested whether Stat3 and Stat5, acting downstream of Bcr-Abl are critical for leukaemia maintenance and if they could be a alternative target for treatment.

"We developed a tumour-specific gene-deletion approach to analyse the roles of Stat5 and Stat3 in Bcr/Abl-induced leukaemia growth," said Sexl. "We discovered that both factors are required for the development of Bcr-Abl, but once established only Stat5 is crucial for the survival and growth of leukemic Cells."

Even mutated forms of bcr-abl, Leukaemia cells, which are resistant to inhibiting drugs such as Imatinib, are still dependent on Stat5.

"Cancer cells undergo extensive adaptations in their signalling and metabolic pathways, thereby becoming dependent on certain genes," said Sexl. "In fact the activity of these genes can become limiting for a cancer cell."

The term 'Non-oncogene addication' (NOA) has been coined to describe this phenomenon of gene dependency and inhibiting these critical genes within the signalling network is predicted to cause system failure and halt the growth of leukaemia cells.

"In this study we demonstrated that bcr-abl, Leukaemia cells are addicted to Stat5 to maintain the leukameic state, concluded Sexl. "We've identified Stat5 as an Achilles' heel in the signalling network downstream of Bcr-Abl. Thus, inhibition of Stat5 may provide a novel therapeutic approach for treatment of leukaemia."


'/>"/>

Contact: Ben Norman
Lifesciencenews@wiley.com
44-124-377-0375
Wiley-Blackwell
Source:Eurekalert

Related medicine news :

1. Dana-Farber and Sanford-Burnham Institute license flu-targeting antibodies to Genentech and Roche
2. Hacker Attacks Targeting Healthcare Organizations Doubled in the 4th Quarter of 2009 According to SecureWorks Data
3. Targeting cancerous vessels
4. Targeting brain cancer cell metabolism may provide new treatment
5. With White House Jobs Summit This Week KSBH Unveils New TV Ads Targeting Senators on Health Care
6. First live targeting of tumors with RNA-based technology
7. Wistar researchers show targeting normal cells in tumors slows growth
8. Success Targeting Competencies Missed in Traditional Testing Leads to Selection of Amistaff for Poster Presentations on Prophecy's Video-Based Situational Assessments
9. DNA test could be key to targeting treatments for head and neck cancer
10. Another Report Finds Swine Flu Targeting the Young
11. Peregrine Pharmaceuticals Awarded Broad New U.S. Patent for Vascular Imaging Applications of Its PS-Targeting Platform
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/8/2016)... ... December 08, 2016 , ... The Florida Hospital Tampa Wound ... Medical Society (UHMS), the leading authority in hyperbaric medicine. This accreditation identifies the ... hospitals and facilities have earned this distinction. This is the second time the ...
(Date:12/8/2016)... Pennsylvania (PRWEB) , ... December 08, 2016 , ... ... Duck Donuts Franchising Company LLC, announced the first national #QuackGivesBack campaign which ... , “This was our first franchise-wide Quack Gives Back initiative, ...
(Date:12/8/2016)... and JENNERSVILLE, Pa. (PRWEB) , ... December 08, ... ... that Penn Medicine Southern Chester County, a Property owned by an affiliate of ... million, 72,000 square foot Penn Medicine Southern Chester County ambulatory care center (ACC) ...
(Date:12/8/2016)... ... December 08, 2016 , ... CURE Media Group, the nation’s ... groups, has aligned with Upstage Lung Cancer in efforts to combat lung cancer, announced ... J. Hennessy, Jr said, “CURE Media Group is honored to team up with Upstage ...
(Date:12/8/2016)... ... December 08, 2016 , ... David J. Dykeman , ... firm Greenberg Traurig, LLP, will speak at DeviceTalks West, Dec. 12, 2016, at the ... series, and attorneys from the firm’s global Life Sciences & Medical Technology Group have ...
Breaking Medicine News(10 mins):
(Date:12/8/2016)... MOUNTAIN VIEW, Calif. , Dec. 8, 2016 ... it intends to offer newly issued shares of common stock, ... "Shares") pursuant to an underwritten public offering.  The final terms ... at the time of pricing, and there can be no ... completed. IRIDEX expects to use the net proceeds ...
(Date:12/8/2016)... -- Australia Glaucoma Surgery Devices Market Outlook to ... Glaucoma Surgery Devices Market Outlook to 2022", provides ... Devices market. The report provides value, in millions ... prices (USD) within market segement - Glaucoma Drainage ... and distribution shares data for each of these ...
(Date:12/8/2016)...  The global biosurgery market is expected to grow ... of 2016 to 2021. The market is poised to ... billion in 2016. The market is primarily driven by ... injuries and spinal problems, increasing clearance of biosurgery products ... loss management. In this report, the biosurgery ...
Breaking Medicine Technology: