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Idiotype-pulsed dendritic cell vaccination effective.(Brief Article)

Vaccine Weekly

| March 13, 2002 | COPYRIGHT 2002 NewsRX. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)Copyright

2002 MAR 13 - (NewsRx.com & NewsRx.net) -- by Michael Greer, senior medical writer - Dendritic cells (DCs) engineered to carry B-cell, lymphoma-specific antigens can help patients fight off malignancy, researchers in the United States say.

"Tumor-specific clonal immunoglobulin expressed by B-cell lymphomas (idiotype [Id]) can serve as a target for active immunotherapy," according to Dr. John M. Timmerman and colleagues at the Stanford University School of Medicine in Stanford, California.

Therapeutic vaccination with idiotype-pulsed DCs can slow or reverse tumor progression, Timmerman and coauthors found.

After achieving promising results in a preliminary study with 4 B-cell lymphoma patients, the researchers inoculated 35 volunteers with idiotype-pulsed DCs. Ten patients were treated before receiving other therapy, while another 25 were vaccinated after their first chemotherapy regimen, according to the report.

Almost all of the therapy-naive study participants (8 of 10) showed antilymphoma immune responses, study data showed, and 4 of these patients remained progression free for as long as 6 years. Tumor regression was seen in almost a fourth (22%) of the inoculated patients with residual disease and 70% of the chemotherapy-treated patients did not suffer from disease progression for a median of more than three years after vaccination.

The immunogenic carrier protein keyhole limpet hemocyanin (Id-KLH) was needed for high ...

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Source: HighBeam Research, Idiotype-pulsed dendritic cell vaccination effective.(Brief Article)

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