Antibody reverses final throes of cancer in mice
For the first time, a treatment in mice has shown promise against the final, metastatic stages of terminal cancer. Unusually, the antibody targets healthy tissue, not tumour cells, suggesting normal cells play an unwitting role in terminal cancers.
The mouse treatment uses an antibody that binds exclusively to a receptor found on healthy epithelial cells lining organs and blood vessels, called platelet endothelial cell adhesion molecule 1 (PECAM-1).
“It is both unexpected and counter-intuitive that a receptor expressed on normal epithelial cells plays a significant role in orchestrating the fatal progression of advanced metastases,” says Robert Debs of the California Pacific Medical Center Research Institute in San Francisco, head of the research team.
The antibody also stopped the weight loss, muscle atrophy and fatigue that characterises terminal cancer.
Debs and his colleagues found that the antibody stopped the growth of secondary tumours from breast, lung, colon and melanoma cancers in mice. But the antibody didn’t work against earlier, less-aggressive stages of cancer, suggesting it disrupts a process common only to the final stages of major cancers.
“Given its dramatic activity against pre-terminal metastases,” Debs says. “We suspect the antibody will be effective in significantly prolonging life.”
This study suggests that we could potentially target and destroy cancer even after it has spread, says Margaret Frame of Cancer Research UK. “Further testing and refinement is needed to establish the value of this as a potential treatment, but it is very encouraging.”
Journal reference: Proceedings of the National Academy of Sciences, DOI: 10.1073/pnas.1004654107
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Antibody reverses final throes of cancer in mice
Tags: terminal cancers, colon cancers, secondary tumours, medical center research institute
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