Navigation Links
Multiple Sclerosis Drug May Be Linked to Melanoma
Date:2/6/2008

Doctors report 2 cases of the deadly skin cancer developing in patients taking Tysabri

WEDNESDAY, Feb. 6 (HealthDay News) -- Almost immediately after a 46-year-old woman with multiple sclerosis received her first dose of the drug Tysabri, a mole that had been on her shoulder for years suddenly took on a dangerous new character.

It turned out to be a melanoma that spread like wildfire. The woman now has just a few months to live.

At almost the same time, a 45-year-old woman who also has multiple sclerosis developed melanoma in her retina after receiving several doses of Tysabri. She had a family history of melanoma and also had atypical moles on her body; the mole on her retina went back at least nine years.

Although these are just two -- albeit dramatic -- examples, the authors of a letter in the Feb. 7 issue of the New England Journal of Medicine are cautioning doctors who care for MS patients to keep this potential risk in mind.

"Neurologists who have patients who report a family history of melanoma or have funny moles should send them to a dermatologist first. Don't just start them on drugs [Tysabri]," said Dr. John Thomas Mullen, co-author of the letter and a surgical oncologist with Beth Israel Deaconess Medical Center, in Boston.

"I can't say it's cause-and-effect definitively because it's just an observation, but the first patient had had that mole forever. She took the drug and almost instantaneously the lesion changed," added Mullen, who saw both patients.

"We don't know if the two are related right now," said Patricia O'Looney, vice president of biomedical research at the National Multiple Sclerosis Society. "There are so many people taking Tysabri, we should go forward with caution... One should always consult with their doctor and go over their personal family history and decide what is best."

Tysabri (natalizumab), a monoclonal antibody that helps treat autoimmune disorders such as MS and Crohn's disease, has had a clouded history. It first received U.S. Food and Drug Administration approval in November 2004, only to be pulled from the market three months later after several patients in clinical trials developed a rare but deadly viral infection of the brain called progressive multifocal leukoencephalopathy.

In June 2006, the FDA allowed the drug back on the market but with strict conditions governing its use.

Just last month, the FDA approved Tysabri to treat people with a moderate to severe form of Crohn's disease.

But there is basic science to support Mullen's observations.

One of the participants in an earlier study of Tysabri had developed (and subsequently died of) a metastatic melanoma that appeared as soon as he got his first dose of the drug, Mullen said.

And in a study done before Tysabri received FDA approval, melanomas in mice that were given the drug had an increased tendency to detach from the primary tumor and spread.

Tysabari may have a dampening effect on the immune system that encourages the formation of the potentially deadly skin cancer, the letter stated.

And now that Tysabri has been approved for people with Crohn's disease, more people may be at risk, although those with no family history of melanoma and no moles probably don't need to worry, Mullen said.

"Doctors should ask for a family history of melanoma and do a quick skin check," he said. "Tysabri isn't the only drug in our arsenal. You could give the patient something else if you were concerned about that."

More information

The National Multiple Sclerosis Society has more on treatments for MS.



SOURCES: John Thomas Mullen, M.D., assistant professor, surgery, Harvard Medical School, and surgical oncologist, Beth Israel Deaconess Medical Center, Boston; Patricia O'Looney, Ph.D., vice president, biomedical research, National Multiple Sclerosis Society, New York City; Feb. 7, 2008, New England Journal of Medicine


'/>"/>
Copyright©2008 ScoutNews,LLC.
All rights reserved

Related medicine news :

1. DNA vaccine against multiple sclerosis appears safe, potentially beneficial
2. New MRI finding sheds light on multiple sclerosis disease progressio
3. Genomic Health Announces Multiple Studies on Oncotype DX(TM) Presented at 2007 American Society of Clinical Oncology (ASCO) Breast Cancer Symposium
4. Emory researchers identify signaling protein for multiple myeloma
5. Study suggests brain tumors need treatment with multiple targeted drugs
6. Gene profiling can single out the worst cases of multiple myeloma and guide therapy
7. Cell-surface sugar defects may trigger nerve damage in multiple sclerosis patients
8. Multiple corticosteroid injections in pregnant women may increase cerebral palsy
9. Multiple Sclerosis Patients Find Dietary Treatment More Effective Than Pharmaceutical Regimens
10. IVF technique enables pregnancy without multiple births, Stanford researchers find
11. Ingenious Med Forms Multiple Billing Company Partnerships to Market Inpatient Practice Management Solutions
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/5/2016)... ... February 05, 2016 , ... Today, the Whole-Food Warrior TV ... the much-anticipated feature with author Jahnavi Foster, specialist in healthy vegetarian cuisine, will stream ... Each week, on his weekly Whole-Food Warrior TV show, Frank Davis highlights Whole-Food Warriors ...
(Date:2/5/2016)... CA (PRWEB) , ... February 05, 2016 , ... ... to announce the addition of micro-needling services in their Napa Valley office. The ... founders of Plastic Surgery Associates, Dr. Canales and Dr. Furnas, are part of ...
(Date:2/5/2016)... Miami, Florida (PRWEB) , ... February 05, 2016 ... ... largest non-profit organization devoted exclusively to funding innovative lymphoma research and serving the ... services – is poised to once again host, Swirl, A Wine Tasting Event ...
(Date:2/5/2016)... ... February 05, 2016 , ... Regular gym users know the routine: ... wait longer to access the treadmills. It’s a predictable trend. After the excesses of ... and get in shape by joining gyms, starting new walking or running routines, or ...
(Date:2/5/2016)... , ... February 05, 2016 , ... At its annual ... Patrick McDermott as Chairman of the National Board of Directors. Mr. McDermott succeeds former ... the Board,” stated Leslie A. Chambers , APDA President and CEO. “Pat has ...
Breaking Medicine News(10 mins):
(Date:2/5/2016)... , Feb. 5, 2016 Aethlon Medical, Inc. (Nasdaq: ... Chairman and CEO, will be presenting at Source Capital Group,s ... York, NY at 2:15 p.m. ET on Wednesday, ... Immunotherapy Panel discussion taking place at 3:15 p.m. ET. ... approximately one hour after the conclusion of the live event. ...
(Date:2/5/2016)... Feb. 5, 2016  Zimmer Biomet Holdings, Inc. (NYSE ... previously announced underwritten secondary offering of 11,027,558 shares of ... of affiliates of Blackstone and Goldman Sachs.  The shares ... price of $96.45 per share. The selling stockholders will ... Zimmer Biomet nor any of its directors, officers or ...
(Date:2/5/2016)... France , Germany ... and Israel ). It includes a 10-year epidemiology forecast ... segmented by age and sex in these markets. GD epidemiology report is ... in-depth, high quality, transparent and market-driven, providing expert analysis of disease trends ... Germany , Italy , Spain ...
Breaking Medicine Technology: