Navigation Links
Melanoma uses body's immune system to spread to lungs
Date:10/7/2010

The way melanoma cells use the immune system to spread and develop into lung tumors may lead to a therapy to decrease development of these tumors, according to Penn State researchers.

"Melanoma is the most aggressive and metastatic form of skin cancer," said Gavin Robertson, professor of pharmacology, pathology, dermatology and surgery in the Penn State College of Medicine. "Therefore, identifying proteins and molecular mechanisms that regulate metastasis is important for developing drugs to treat this disease."

Metastasis is a complex process in which cancer cells detach from the primary tumor and migrate to other sites in the body by traveling through the lymphatic or blood circulatory systems. Researchers in the Foreman Foundation Melanoma Research Laboratory at Penn State developed a model to determine why the roughly one million tumor cells shed daily from a 1-gram melanoma tumor do not form more metastases in the lungs.

After intravenously injecting 1 million human melanoma cells in a mouse, Robertson and colleagues observed entrapment of many of these cells in the lung vessels. Within 24 hours, however, few cells were still present in the lungs.

"In this study, we show that entrapped, circulating melanoma cells can use a person's own immune cells -- specifically a type of white blood cell called neutrophils -- to control lung metastasis development," Robertson said. After injecting the mice with neutrophils an hour following the melanoma cell injection, cancer cell retention was increased in the lung by about three times.

Melanoma cells produce and secrete high levels of a protein called IL-8, which is used to attract neutrophils.

"For patients, this is important because a therapy preventing circulating melanoma cells from secreting IL-8 would have the potential to decrease lung metastasis development by about 50 percent by disrupting interaction of the cancer cells with neutrophils," Robertson said. "Metastases form by proteins on the melanoma and neutrophils interacting and forming physical connections. These connections promote anchoring of the melanoma cells to the lung vessel walls, enabling the cancer cells to migrate through the wall to form lung metastases."

Decreasing the secretion of IL-8 limits the interaction of melanoma cells with neutrophils, dropping the number of melanoma cells retained in the lungs by about half.


'/>"/>

Contact: Matt Solovey
msolovey@hmc.psu.edu
717-531-8606
Penn State
Source:Eurekalert

Related medicine news :

1. Scanning for skin cancer: Infrared system looks for deadly melanoma
2. Non-Melanoma Skin Cancers in the Millions and Rising
3. Late-stage melanoma results in economic burden
4. Clinical trial to test whether vaccine can effectively treat melanoma
5. Wistar scientists explain the persistence of melanoma through dynamic stemness
6. Tanning Beds Can Greatly Boost Melanoma Risk
7. U of M study definitively links indoor tanning to melanoma
8. Indoor Tanning Beds Increase Risk of Melanoma
9. Novel Drug Combats Advanced Melanoma
10. Combination treatment regimen not effective against advanced melanoma
11. New treatment method safe, effective for advanced melanoma patients
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/27/2016)... Overland Park, KS (PRWEB) , ... June 27, 2016 , ... ... leader in retailers of Eyeglasses . , Millions of individuals in the United ... life, eyeglasses have become a way to both correct vision and make a fashion ...
(Date:6/26/2016)... ... ... legally blind and certified personal trainer is helping to develop a weight loss fitness plan ... fix the two major problems leading the fitness industry today:, , ... They don’t eliminate all the reasons people quit their exercise program ...
(Date:6/25/2016)... ... June 25, 2016 , ... "With 30 hand-drawn hand gesture animations, FCPX users ... - CEO of Pixel Film Studios. , ProHand Cartoon’s package transforms over 1,300 ... Pro X . Simply select a ProHand generator and drag it above media or ...
(Date:6/25/2016)... ... June 25, 2016 , ... Conventional wisdom preaches the ... In terms of the latter, setting the bar too high can result in disappointment, ... just slow progress toward their goal. , Research from PsychTests.com reveals ...
(Date:6/24/2016)... ... June 24, 2016 , ... The ... in Dallas that it will receive two significant new grants to support its ... PHA marked its 25th anniversary by recognizing patients, medical professionals and scientists for ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... ITASCA, Ill. , June 23, 2016  In a startling ... states are failing their residents by lacking a comprehensive, proven plan ... , a definitive ranking of how states are tackling the ... rating to only four states – Kentucky , ... and Vermont . Of the 28 failing states, ...
(Date:6/23/2016)... , June 23, 2016 Bracket , a ... its next generation clinical outcomes platform, Bracket eCOA (SM) ... on June 26 – 30, 2016 in Philadelphia ... electronic Clinical Outcome Assessment product of its kind to fully ... Bracket eCOA 6.0 is a flexible platform for ...
(Date:6/23/2016)... -- Guerbet announced today that it has been named a ... One of 12 suppliers to receive the ... of Premier members through exceptional local customer service and ... lower costs. "We ... customer service from Premier," says Massimo Carrara , ...
Breaking Medicine Technology: