Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research
Date (from‐to) : 2016/04 -2019/03
Author : Hayashi Noriyuki
Photodynamic therapy (PDT) is an attractive, minimally invasive modality for cancer treatment that utilizes the interaction of light and photosensitizer. To improve the efficacy of PDT, development of cancer specificity and selectivity of the photosensitizer is needed.
Macrophages migrating to tumor stroma are called tumor-associated macrophages (TAMs). TAMs play several pro-tumoral roles including tumor cell growth, angiogenesis, matrix remodeling, and metastases. TAMs are known to specifically express abundant levels of CD206, a mannose receptor.We evaluated the anticancer effects of targeting TAM via PDT with M-chlorin. The specific suppression of TAM in cancer stroma significantly suppressed tumor growth in allograft models. Such therapeutic targeting of TAMs as well as cancer cells may represent a new strategy for anticancer therapy.