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Cancer Health Center

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Anemia Drug May Hurt Cancer Treatment

Worse Survival, Cancer Control Seen With Cancer-Related Anemia Drug

Conflicting Research

But why would the results of this trial differ from those of previous studies suggesting benefits of drugs for cancer-related anemia beyond its effect on anemia?

Henke cites differences in how earlier studies were done compared with this newer, more powerful study. In addition, many previous studies looked at quality of life rather than survival or cancer control, he says.

Because this study was done exclusively in patients receiving radiation therapy for cancers of the mouth and throat, Rizzo warns against extrapolating these findings to patients receiving chemotherapy or to those with other types of cancer.

Henke says that his study did not address the effect of cancer-related anemia drugs in other settings but he believes that the results would be similar.

Similarly, he says he doubts these findings are specific to the epoetin beta used in this study, referring to a study in the August issue of The Lancet showing a negative effect of epoetin alfa in women with breast cancer. "If epoetin stimulates tumor growth, it shouldn't matter which specific compound you use," Henke says.

Experts Agree

How and when should these findings be applied to clinical practice? All experts interviewed by WebMD agreed on the need for additional well-controlled trials as well as for long-term follow-up on patients already receiving epoetin in ongoing studies.

"This alarming, well-performed study and the recent report of a prematurely terminated breast cancer study should alert and give rise to concern to all investigators working in the field of epoetin treatment for cancer-related anemia," Michael Hedenus, MD, head of hematology at County Hospital in Sundsvall, Sweden, tells WebMD.

However, he's not convinced that these findings would be the same for different cancers.

Hedenus has received unrestricted research funds from Roche and has given lectures paid for by Roche and Amgen (maker of Procrit). Roche and Amgen are WebMD sponsors.

"We have to remember that cancers consist of different entities, each with its own biology and responsiveness to different [body chemicals] and hormones," Hedenus says.

Hedenus has performed studies on the effect of epoetin on anemia related to blood cancers and says he is not aware of disease progression or deaths linked to epoetin. On the contrary, he cites his own study and two others suggesting either no effect or an improvement on survival for epoetin compared with placebo.

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