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2003 JUL 9 - (NewsRx.com & NewsRx.net) -- Intradermal injection, as opposed to subcutaneous injection, enhanced immunogenicity and suppressed tumorigenicity of tumor cells.
"Tumor cell immunogenicity depends heavily upon the microenvironment in which the cells grow. We have compared the tumorigenicity and immunogenicity of the same tumor cells when injected either into the dermis, a tissue containing numerous dendritic cells (DCs), or s.c. at a site which contains only few DCs," scientists in the United States and France report.
"After s.c. injection, progressive tumors were constantly obtained, whereas most intradermal injections did not give rise to tumor and immunized animals against additional challenge," said Bernard Bonnotte and collaborators at the Mayo Clinic in the United States and INSERM U517 in France. "We present evidence that the high density of DCs at dermal sites facilitates the capture of ...