Navigation Links
Patient's Own Infection-Fighting T Cells Put Late-Stage Melanoma Into Long-Term Remission - Without Chemotherapy or Radiation
Date:6/18/2008

Case is first to show safety and effectiveness of using cloned cells alone

to kill tumors

SEATTLE, June 18 /PRNewswire/ -- 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.

Researchers in Yee's lab, the University of Washington School of Medicine and the Ludwig Institute for Cancer Research in New York collaborated on the research. The Burroughs-Wellcome Foundation, Damon Runyon Cancer Research Foundation, Edson Foundation and National Cancer Institute funded the study.

At Fred Hutchinson Cancer Research Center, our interdisciplinary teams of world-renowned scientists and humanitarians work together to prevent, diagnose and treat cancer, HIV/AIDS and other diseases. Our researchers, including three Nobel laureates, bring a relentless pursuit and passion for health, knowledge and hope to their work and to the world. For more information, please visit http://fhcrc.org.

CONTACT:

Dean Forbes

206-667-2896

dforbes@fhcrc.org Available Topic Expert(s): For information on the listed expert(s), click appropriate link. Dean Forbes https://profnet.prnewswire.com/Subscriber/ExpertProfile.aspx?ei=4123


'/>"/>
SOURCE Fred Hutchinson Cancer Research Center
Copyright©2008 PR Newswire.
All rights reserved

Related medicine technology :

1. Dendreon Announces Publication of Phase 1 Study Highlighting Immunologic and Clinical Activity of Lapuleucel-T (Neuvenge(R)) in Advanced Breast Cancer Patients
2. Cephalon Announces Positive Results from a Pivotal Study of FENTORA in Opioid-tolerant Patients with Non-cancer Breakthrough Pain
3. Millennium Initiates Clinical Trial to EVOLVE the Treatment of Patients with Newly Diagnosed Multiple Myeloma
4. Allos Therapeutics Initiates Study of PDX in Patients with Cutaneous T-Cell Lymphoma
5. Vion Pharmaceuticals Completes Accrual of 85 Patients to its Pivotal Phase II Trial of Cloretazine(R) (VNP40101M) in Elderly AML
6. Sixty-One Percent of Newly Diagnosed Parkinsons Disease Patients Do Not Receive Any Drug Treatment in the First Year of Diagnosis
7. Callisto Pharmaceuticals Opens Additional Sites for Phase II Clinical Trial of Atiprimod in Advanced Carcinoid Cancer Patients
8. Many Heart Attack Patients Dont Get Best Emergency Treatment
9. Video: Landmark Study in The Lancet: Patients Treated With Betaseron(R) After First MS Attack Experienced Significant Delay in MS Progression
10. Phase 2a Multi-Dose Study Initiated by MedImmune in Patients With Asthma to Further Expand Anti-Interleukin-9 Program
11. MedImmune Initiates Phase 2a Multi-Dose Study in Patients with Asthma
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/8/2016)... 8, 2016 KEY FINDINGS The ... in 2017-2023. Various reasons for growth of the medical ... incidences of chronic diseases, high recovery cost of injuries ... Medical lifting sling refers to an assistive device ... These slings connect to the lift and hold the ...
(Date:12/8/2016)... Dec. 8, 2016 Allergy Diagnostics Market: ... and tests that are used to determine the ... milk, or drugs etc. in the samples by ... immune system. The report on global allergy diagnostics ... the market. The report consists of an executive ...
(Date:12/8/2016)... Dec 8, 2016 Research and Markets has ... and Trends - Adhesion Type, Application, Usability - Forecast to 2025" ... , ... Electrodes Market is poised to grow at a CAGR of around ... the market is witnessing include advancements in extracellular microelectrode arrays and ...
Breaking Medicine Technology:
(Date:12/8/2016)... ... December 08, 2016 , ... STAT courier is pleased to announce that due ... Texas, they are expanding their presence in Dallas. One of the most exciting parts ... new jobs to the Dallas and Forth Worth market. STAT takes pride in treating ...
(Date:12/8/2016)... , ... December 08, 2016 , ... ... after surgery as possible. With this in mind, SIGVARIS has created a new ... blood clot) during bed rest and provide the benefits of graduated compression when ...
(Date:12/8/2016)... Francisco, California (PRWEB) , ... December 08, 2016 , ... ... coaches, has raised an $18M Series B led by Canvas Ventures . Other ... the capital to scale its mobile platform to serve more consumers who are managing ...
(Date:12/8/2016)... ... December 08, 2016 , ... The Dianne ... offices headquartered in Hamilton County, is embarking on a charity drive with the ... finding new homes for orphaned or neglected senior dogs in the Cincinnati region, ...
(Date:12/8/2016)... AZ (PRWEB) , ... December 08, 2016 , ... ... firm with offices that serve communities in and around the greater Phoenix metropolitan ... the Homeless Youth Connection. , The mission of the Homeless Youth Connection is ...
Breaking Medicine News(10 mins):