Navigation Links
Patient's own infection-fighting T cells put late-stage melanoma into long-term remission
Date:6/18/2008

SEATTLE Researchers describe the first successful use of a human patient's cloned infection-fighting T cells as the sole therapy to put an advanced solid-tumor cancer into long-term remission. A team led by Cassian Yee, M.D., an associate member of the Clinical Research Division at Fred Hutchinson Cancer Research Center, reports these findings in the June 19 issue of the New England Journal of Medicine.

Yee and colleagues removed CD4+ T cells, a type of white blood cell, from a 52-year-old man whose Stage 4 melanoma had spread to a groin lymph node and to a lung. T cells specific to targeting the melanoma were then expanded vastly in the laboratory using modifications to existing methods. The lab-grown cells were then infused into the patient with no additional pre- or post-conditioning therapies, such as growth-factor or cytokine treatment. Two months later, PET and CT scans revealed no tumors. The patient remained disease free two years later, when he was last checked.

"We were surprised by the anti-tumor effect of these CD4 T cells and its duration of response," Yee said. "For this patient we were successful, but we would need to confirm the effectiveness of therapy in a larger study."

Yee cautioned that these results, presented in the journal's "Brief Report" section, represent only one patient with a specific type of immune system whose tumor cells expressed a specific antigen. More studies are needed to confirm the effectiveness of the experimental T-cell therapy. If proven successful in more patients, Yee predicted this therapy could be used for the 25 percent of all late-stage melanoma patients who have the same immune-system type and tumor antigen.

Using a patient's own immune system to combat cancer, called immunotherapy, is a growing area of research that aims to develop less-toxic cancer treatments than standard chemotherapy and radiation.

The patient in the journal report was one of nine patients with metastatic melanoma who were being treated in a recently completed clinical trial to test dose- escalation of autologous CD4+ T cells. Earlier studies performed by Yee used CD8+ T cells, which do not persist in the body without the support of CD4+ T cells or growth factors such as interleukin 2. Yee and colleagues theorized that infusion of a massive dose of CD4+ T cells would persist longer in the body because they make their own growth factor, interleukin 2, while stimulating the anti-tumor effect of the patient's existing CD8+ T cells. However, until recently there was no feasible way to isolate and expand anti-tumor CD4+ T cells in the lab.

The researchers were successful in all of these areas. The patient received a dose of 5 billion cloned CD4+ T cells with specificity for the melanoma-associated NY-ESO-1 antigen. The cells persisted for at least 80 days in the patient's body. And, even though only 50 percent to 75 percent of the patient's tumor cells expressed the NY-ESO-1 antigen, the entire tumor regressed following the infusion. The scientists postulated that the patient's immune response was broadened to other antigens expressed by the tumor cells. Follow-up tests showed T-cell responses to two additional tumor antigens, MAGE-3 and MART-1.


'/>"/>

Contact: Dean Forbes
dforbes@fhcrc.org
206-667-2896
Fred Hutchinson Cancer Research Center
Source:Eurekalert

Related medicine news :

1. World Renowned Hand Surgeon Helps Patients Conquer Joint Discomfort Naturally
2. FDA Panel Recommends Enbrel for Pediatric Patients
3. FDA approves NeuRx diaphragm pacing system for use in spinal cord- injured patients
4. Medicsight ColonCAD Technology Successfully Identified Cancer in 100% of Patients Included in Data Presented at ESGAR 2008
5. Patient Data Analysis Report Finds More Than 75 Percent of Chronically Ill Patients Unable to Obtain Needed Healthcare Have Some Form of Insurance
6. Decatur Memorial Hospital Becomes First in Illinois to Treat Cancer Patients With RapidArc(TM) Radiotherapy Technology
7. Long-Term Safety Data on Lialda(TM) (mesalamine) for Patients With Ulcerative Colitis Published in Leading GI Journal
8. Same-day pregnancy test provides valuable guidance to pre-surgery patients
9. Future hope for patients with breast cancers resistant to tamoxifen
10. Some patients may not need insulin for long-term control of type 2 diabetes
11. Nurses, Doctors, Patients to Protest Health Insurers at National Day of Action - June 19th
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/2/2016)... ... December 02, 2016 , ... ... launch of its 60-day free trial program for all of the company’s desktop ... offer a truly hassle free experience. , FlexiSpot’s unique desktop risers use an ...
(Date:12/2/2016)... ... December 02, 2016 , ... ... two ostomy patients, standing as living proof that attitude and determination can combine ... and issues that spike around the holidays. This campaign will offer patients a ...
(Date:12/2/2016)... Hawaii (PRWEB) , ... December 02, 2016 , ... ... 2016 at the Hyatt Regency Waikiki Beach Resort and Spa in Honolulu, offering ... in the field of pain management. , The demand for supplemental training ...
(Date:12/2/2016)... ... December 02, 2016 , ... "Pro3rd Accents Volume 2 is ... create versatile lower third titles with just a few clicks of the mouse," said ... includes 30 lower third animations. Choose from various styles with accented animations, rigid boxes, ...
(Date:12/2/2016)... ... 02, 2016 , ... ‘Tis the season for giving! Today, 20 creative teams ... Family Partnership and the Drug Enforcement Administration as part of the National Red Ribbon ... winning schools who decorated their campuses with this year’s Red Ribbon Week theme: “YOLO. ...
Breaking Medicine News(10 mins):
(Date:12/2/2016)... Columbia , December 2, 2016 bioLytical Laboratories, ... INSTI HIV-Selbsttest, bei den Mitgliedern des Apothekenbundes von Kenia eingeführt. ... ... INSTI HIV Self Test! (PRNewsFoto/bioLytical Laboratories) ...      (Photo: http://photos.prnewswire.com/prnh/20161201/444905 ) ...
(Date:12/2/2016)... BEIJING , Dec. 2, 2016 ... ("Lianluo Smart" or "the Company") which develops, markets ... products in China and ... Cardiovascular Disease Diagnosis and Treatment New Progress Forum, ... Guangdong Province , Guangdong Provincial ...
(Date:12/2/2016)... Research and Markets has announced the addition of Jain ... and Companies" to their offering. ... , , Drug ... market value of drug delivery technologies and the anticancer drugs are ... to organs involved and the types of cancer as well as ...
Breaking Medicine Technology: