Navigation Links
Worm studies shed light on human cancers
Date:4/21/2011

MADISON -- Research in the worm is shedding light on a protein associated with a number of different human cancers, and may point to a highly targeted way to treat them.

University of Wisconsin-Madison scientists were studying a worm protein called TFG-1, which is present in many cell types but whose exact role had never been understood. The scientists discovered that the protein controls key aspects of the movement, or secretion, of growth factors out of cells.

"TFG-1 has never been implicated in the secretory process before," says Dr. Anjon Audhya, an assistant professor of biomolecular chemistry in the School of Medicine and Public Health. "It turns out that humans carry a very similar protein, and we think it plays the same role in humans as in worms."

Reviewing the scientific literature, the researchers found that the gene encoding TFG in humans is fused to at least three other genes implicated in anaplastic large cell lymphoma, papillary thyroid carcinoma and extraskeletal chondrosarcoma. The fusions occur when two broken or rearranged pieces of DNA combine to form a "chimeric" gene with completely distinct properties.

Audhya's studies of TFG-1 in the worm led him to develop a model that explains how TFG fusions may stimulate cancer in humans. As reported in the current issue of Nature Cell Biology (Advanced Online Publication), he proposes that abnormal levels of growth factor secretion may produce a rich micro-environment that helps tumors form and thrive. "We think certain properties of TFG lead it to be a very effective precursor oncogene," he says.

Normally, a growth factor primed to leave a cell is encompassed by a sac, or vesicle, and then transported from one structure inside the cell to anotherendoplasmic reticulum (ER) to Golgibefore it leaves the cell and discharges into the extracellular space.

Through their genetic studies, the Wisconsin researchers found that TFG-1 in the worm controls vesicle formation and secretion out of the ER.

"We found TFG-1 lies at the interface between the ER and the Golgi, in a scaffolding structure called the ER exit site, where it regulates the formation of vesicles carrying their critical cargo," Audhya says.

The research revealed the precise location where TFG-1 does its work and the mechanism by which it spurs unchecked activity.

The scientists demonstrated that human TFG also functions at ER exit sites, which contain a characterized scaffolding protein called Sec16, and likely regulates secretion of multiple cargoes out of cells.

"In the case of one fusion gene, TFG-NTRK-1, the concentrated non-stop activity of NTRK-1 at ER exit sites may cause the first steps that can transform a normal cell into a cancer cell," Audhya says.

The TFG fusions offer a direct target for future "designer" therapies.

"If you identified patients who have fusion genes that express chimeric proteins, you could create a drug that affects only those proteins," he says, adding that TFG fusions leading to chimeric proteins do not exist in healthy people.

Excited about the possibility that their basic science investigations may be applied to several areas of clinical medicine, the researchers have also begun studying TFG as it relates to B-cell development and the secretion of antibodies.


'/>"/>

Contact: Dian Land
dj.land@hosp.wisc.edu
608-261-1034
University of Wisconsin-Madison
Source:Eurekalert

Related medicine news :

1. UC studies show marijuana has therapeutic value, reports to legislature
2. Second Dose of Gene Therapy for Inherited Blindness Proves Safe in Animal Studies
3. Studies Detail Possible Benefits of omega-3 Fatty Acids for Dogs With Arthritis
4. COPPERTONE(R) Solar Research Center Unveils Studies on Efficacy of Topical Antioxidants in Sunscreens at 2010 Annual Meeting of The American Academy of Dermatology
5. Promega - TOP srl Agreement Enables Live Animal Imaging for Cancer Studies
6. Most Drug Studies Dont Help Docs Pick Best Treatment
7. Gays, Lesbians Excluded From Some Medical Studies
8. Studies Show Significant Increases of C. Difficile Infections (CDI)
9. Studies examine Third Eye Retroscope during colonoscopy
10. Statement of Ralph B. Everett, President and CEO, Joint Center for Political and Economic Studies, on House Passage of Health Reform Legislation
11. New studies on surgical options in inherited breast cancer show drastic treatment is not always best
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/20/2017)... ... January 20, 2017 , ... A new partnership between Goodwill® and ... longer use or need, from clothes to couches to dressers and bicycles. Roadie — ... them to the nearest Goodwill donation center through February 28th. , “January is ...
(Date:1/20/2017)... , ... January 20, 2017 , ... Doctor C LLC, ... attended the January ECRM trade show to continue the marketing and distribution of its ... supplement, known for providing 400 percent better absorption than traditional vitamin C supplements. At ...
(Date:1/20/2017)... ... January 20, 2017 , ... ... enhance people’s everyday lives, recently attended the January ECRM Trade Show in Hilton ... is known for its large range of supplements that keep the body functioning ...
(Date:1/20/2017)... ... January 20, 2017 , ... "TransFlare 4K Mystique comes ... of Final Cut Pro X," said Christina Austin - CEO of Pixel Film Studios. ... Utilizing the Dragon Sensor,TransFlare 4K Mystique lens flare and light leak transitions have a ...
(Date:1/20/2017)... ... January 20, 2017 , ... “The Angel”: a heartwarming ... set out for each of his children. “The Angel” is the creation of published ... in New York City, and impassioned writer. , When asked of her new book, ...
Breaking Medicine News(10 mins):
(Date:1/21/2017)... 2017  Faruqi & Faruqi, LLP, a leading national securities ... "Company") (NASDAQ: KMPH ) of the federal securities ... and directors and underwriters of the Company,s April 16, 2015 ... lead plaintiff. The lawsuit has been filed in ... Johnson County on behalf of all those ...
(Date:1/20/2017)... Research and Markets has announced the addition of ... OTC Amplifiers, Diagnostic Instruments), Sales Volume, Company Analysis and Forecast ... ... Sales Volume, Company Analysis and Forecast to 2022 provides a ... The growing prevalence of hearing impairment coupled with an ...
(Date:1/20/2017)... 20, 2017 Stock-Callers.com today evaluates the ... SGYP ), Novo Nordisk A/S (NYSE: NVO ), ... Therapeutics Holdings Inc. (NASDAQ: PTX ). These stocks ... 19 th , 2017, finishing near its session lows. As ... over 0.7%, while shares of health care companies in the ...
Breaking Medicine Technology: