Featured Research

from universities, journals, and other organizations

New targets for anti-angiogenesis drugs revealed

Date:
August 21, 2010
Source:
Tufts University, Health Sciences
Summary:
A new study describes a novel pathway of angiogenesis, the growth of new blood vessels. Targeting the new pathway, scientists identified two approaches that significantly reduced angiogenesis in mice. These discoveries may lead to novel treatments for diseases caused by excessive angiogenesis, including corneal graft rejection, age-related macular degeneration, cancer and diabetes.

On the left: blood vessel formation that resulted from normal galectin-3 function. On the right: reduced blood vessel formation when galectin-3 was depleted.
Credit: Image courtesy of Tufts University

A new study describes how a carbohydrate-binding protein, galectin-3, promotes angiogenesis, the growth of new blood vessels. Targeting the protein, scientists identified two approaches that significantly reduced angiogenesis in mice. These discoveries, published online August 16 in The Journal of Experimental Medicine, may lead to novel treatments for diseases caused by excessive angiogenesis, including age-related macular degeneration, cancer, and diabetes.

When the body needs to expand its network of blood vessels, cells release molecular signals called growth factors that prompt angiogenesis. While this process is key for normal growth, development, and wound healing, it can be harmful when blood vessels supply tumors or other diseased tissue, or when excessive blood vessel growth encroaches on surrounding tissues.

A growing body of research indicates that a protein called galectin-3 promotes angiogenesis, indicating that it may be a valuable target for drugs that halt harmful blood vessel growth. Until now, though, scientists did not understand how galectin-3 promotes angiogenesis.

Led by Noorjahan Panjwani, PhD, researchers propose a mechanism that explains how galectin-3 brings about angiogenesis. Panjwani is a professor in the department of ophthalmology at Tufts University School of Medicine and a member of the biochemistry and cell, molecular and developmental biology program faculties at the Sackler School of Graduate Biomedical Sciences.

"Our study shows that galectin-3 protein binds to glycans (carbohydrate portions) of specific cell-adhesion proteins, the integrins, to activate the signaling pathways that bring about angiogenesis. This improved understanding may provide a more targeted approach to preventing harmful angiogenesis," said Panjwani.

"We found that application of a galectin-3 inhibitor significantly reduced angiogenesis in mice. We also found that preventing galectin-3 from binding with the integrins reduced angiogenesis," said first author Anna Markowska, a PhD student in the biochemistry program at the Sackler School of Graduate Biomedical Sciences at Tufts.

"By deciphering the mechanism of galectin-3 action, we were able to establish more than one therapeutic target. The more we know about how this pathway works, the more options we have for potential treatments," said Panjwani.

Panjwani's lab is dedicated to understanding the cell biological and biochemical mechanisms of wound healing and angiogenesis, specifically for the purpose of developing improved treatments for blinding eye diseases. Panjwani's research is also focused on Acanthamoebakeratitis, a rare and painful parasitic infection of the cornea that can affect contact lens wearers. She is currently working on strategies to protect against the infection and is developing a test that identifies at-risk individuals by sampling their tears.

Fu-Tong Liu, MD, PhD, professor and chair of the department of dermatology at University of California Davis School of Medicine, is also an author of the study.

This work was funded by the National Eye Institute, part of the National Institutes of Health, the Massachusetts Lions Eye Research Fund, and Research to Prevent Blindness.


Story Source:

The above story is based on materials provided by Tufts University, Health Sciences. Note: Materials may be edited for content and length.


Journal Reference:

  1. Markowska AI, Liu FT, Panjwani N. Galectin-3 is an Important Mediator of VEGF- and bFGF-mediated Angiogenic Response. The Journal of Experimental Medicine, 2010; 207 (9) DOI: 10.1084/jem.20090121

Cite This Page:

Tufts University, Health Sciences. "New targets for anti-angiogenesis drugs revealed." ScienceDaily. ScienceDaily, 21 August 2010. <www.sciencedaily.com/releases/2010/08/100816110417.htm>.
Tufts University, Health Sciences. (2010, August 21). New targets for anti-angiogenesis drugs revealed. ScienceDaily. Retrieved October 21, 2014 from www.sciencedaily.com/releases/2010/08/100816110417.htm
Tufts University, Health Sciences. "New targets for anti-angiogenesis drugs revealed." ScienceDaily. www.sciencedaily.com/releases/2010/08/100816110417.htm (accessed October 21, 2014).

Share This



More Health & Medicine News

Tuesday, October 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

CDC Revamps Ebola Guidelines After Criticism

CDC Revamps Ebola Guidelines After Criticism

Newsy (Oct. 21, 2014) The Centers for Disease Control and Prevention have issued new protocols for healthcare workers interacting with Ebola patients. Video provided by Newsy
Powered by NewsLook.com
First-Of-Its-Kind Treatment Gives Man Ability To Walk Again

First-Of-Its-Kind Treatment Gives Man Ability To Walk Again

Newsy (Oct. 21, 2014) A medical team has for the first time given a man the ability to walk again after transplanting cells from his brain onto his severed spinal cord. Video provided by Newsy
Powered by NewsLook.com
CDC Issues New Ebola Guidelines for Health Workers

CDC Issues New Ebola Guidelines for Health Workers

Reuters - US Online Video (Oct. 21, 2014) The U.S. Centers for Disease Control and Prevention has set up new guidelines for health workers taking care of patients infected with Ebola. Linda So reports. Video provided by Reuters
Powered by NewsLook.com
'Cadaver Dog' Sniffs out Human Remains

'Cadaver Dog' Sniffs out Human Remains

AP (Oct. 21, 2014) Where's a body buried? Buster's nose can often tell you. He's a cadaver dog, specially trained to find human remains and increasingly being used by law enforcement and accepted in courts. These dogs are helping solve even decades-old mysteries. (Oct. 21) Video provided by AP
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


Health & Medicine

Mind & Brain

Living & Well

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