Abstract
The antibody-based targeted delivery of bioactive molecules to tumor vasculature is an attractive avenue to concentrate therapeutic agents at cancer sites, while sparing normal organs. L19, F8 and F16 are clinical-stage human monoclonal antibodies, which selectively recognize splice isoforms of fibronectin and tenascin-C in the modified extracellular matrix of neoplastic lesions. Here, we report the first comparative immunohistochemical analysis of L19, F8 and F16 in human Hodgkin and non-Hodgkin lymphomas. F16 was found to strongly stain the majority of lymphomas but also specimens of nonspecific lymphadenitis. By contrast, L19 exhibited a better discrimination between tumoral and inflammatory processes, yet at the expense of a weaker staining of the majority of lymphoma specimens investigated. The staining patterns observed for F8 were intermediate between the ones observed for L19 and F16. This study provides a rationale basis for the clinical investigation of therapeutic derivatives of the three antibodies in lymphoma patients.
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