Featured Research

from universities, journals, and other organizations

Blocking common gateway to inflammation suppresses cancer

Date:
June 13, 2011
Source:
Cell Press
Summary:
There is an intimate and complex relationship between inflammation and cancer; and it is well established that tumors secrete many different chemicals that attract host cells which drive inflammation and help to support tumor growth. Now, a new study identifies a single protein that is required for trafficking of immune cells involved in inflammation. The research opens up new avenues for therapeutics that can indirectly suppress malignancy by disrupting the inflammatory response.

There is an intimate and complex relationship between inflammation and cancer; and it is well established that tumors secrete many different chemicals that attract host cells which drive inflammation and help to support tumor growth. Now, a new study published by Cell Press in the June issue of the journal Cancer Cell identifies a single protein that is required for trafficking of immune cells involved in inflammation. The research opens up new avenues for therapeutics that can indirectly suppress malignancy by disrupting the inflammatory response.

"Tumors induce inflammatory responses that stimulate tumor survival and progression. Therefore, targeting tumor inflammation could provide substantial therapeutic benefit to most, if not all, cancer patients," says senior study author, Dr. Judith A. Varner from the University of California, San Diego. "However, effective suppression of tumor inflammation requires identification and targeting of mechanisms that are common to the many diverse inflammatory pathways that are activated during tumor growth."

In their study, Dr. Varner and colleagues investigated the mechanisms that control tumor growth and inflammation by looking at molecular signals that are commonly activated by multiple diverse tumor-derived chemical signals. The researchers made the unexpected discovery that a single enzyme called PI3Kinase gamma served as a convergent point for a wide range of signaling pathways that controlled both tumor inflammation and progression.

A variety of experimental approaches with mouse and human cells demonstrated that disrupting PI3Kinase gamma prevented invasion of inflammatory cells into the tumor. Tumors developed more slowly and metastasis was suppressed in mice lacking PI3Kinase gamma even though cancer cells did not express PI3Kinase gamma and inhibitors had no direct effect on the tumor cells. The PI3Kinase gamma inhibitors indirectly interfered with the progression of cancer by preventing inflammation. Importantly, because the inhibitors do not directly influence tumor cells, it is not likely that they will develop resistance to PI3Kinase gamma inhibitors.

"Our studies show that PI3Kinase gamma is an excellent target for cancer therapeutics, as this enzyme is primarily expressed in specific immune cells and is a gatekeeper of tumor inflammation and tumor progression," concludes Dr. Varner. "We found that PI3Kinase gamma inhibitors strongly suppressed tumor growth and progression in mice without apparent side effects. Thus, selective inhibitors of PI3Kinase gamma could serve as relatively nontoxic therapeutics to suppress tumor malignancy by blocking diverse pathways promoting tumor inflammation."


Story Source:

The above story is based on materials provided by Cell Press. Note: Materials may be edited for content and length.


Journal Reference:

  1. Michael C. Schmid, Christie J. Avraamides, Holly C. Dippold, Irene Franco, Philippe Foubert, Lesley G. Ellies, Lissette M. Acevedo, Joan R.E. Manglicmot, Xiaodan Song, Wolfgang Wrasidlo, Sara L. Blair, Mark H. Ginsberg, David A. Cheresh, Emilio Hirsch, Seth J. Field, Judith A. Varner. Receptor Tyrosine Kinases and TLR/IL1Rs Unexpectedly Activate Myeloid Cell PI3Kγ, A Single Convergent Point Promoting Tumor Inflammation and Progression. Cancer Cell, Volume 19, Issue 6, 715-727, 14 June 2011 DOI: 10.1016/j.ccr.2011.04.016

Cite This Page:

Cell Press. "Blocking common gateway to inflammation suppresses cancer." ScienceDaily. ScienceDaily, 13 June 2011. <www.sciencedaily.com/releases/2011/06/110613122525.htm>.
Cell Press. (2011, June 13). Blocking common gateway to inflammation suppresses cancer. ScienceDaily. Retrieved October 21, 2014 from www.sciencedaily.com/releases/2011/06/110613122525.htm
Cell Press. "Blocking common gateway to inflammation suppresses cancer." ScienceDaily. www.sciencedaily.com/releases/2011/06/110613122525.htm (accessed October 21, 2014).

Share This



More Plants & Animals News

Tuesday, October 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

White Lion Cubs Born in Belgrade Zoo

White Lion Cubs Born in Belgrade Zoo

AFP (Oct. 20, 2014) Two white lion cubs, an extremely rare subspecies of the African lion, were recently born at Belgrade Zoo. They are being bottle fed by zoo keepers after they were rejected by their mother after birth. Duration: 00:42 Video provided by AFP
Powered by NewsLook.com
Traditional Farming Methods Gaining Ground in Mali

Traditional Farming Methods Gaining Ground in Mali

AFP (Oct. 20, 2014) He is leading a one man agricultural revolution in Mali - Oumar Diatabe uses traditional farming methods to get the most out of his land and is teaching others across the country how to do the same. Duration: 01:44 Video provided by AFP
Powered by NewsLook.com
Goliath Spider Will Give You Nightmares

Goliath Spider Will Give You Nightmares

Buzz60 (Oct. 20, 2014) An entomologist stumbled upon a South American Goliath Birdeater. With a name like that, you know it's a terrifying creepy crawler. Sean Dowling (@SeanDowlingTV) has the details. Video provided by Buzz60
Powered by NewsLook.com
Adorable Video of Baby Rhino and Lamb Friend Playing

Adorable Video of Baby Rhino and Lamb Friend Playing

Buzz60 (Oct. 20, 2014) Gertjie the Rhino and Lammie the Lamb are teaching the world about animal conservation and friendship. TC Newman (@PurpleTCNewman) has the adorable video! Video provided by Buzz60
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins