目的探讨体外激活血卟啉、开展光动力学疗法治疗消化道肿瘤的疗效及其毒副反应。
Objective to explore the curative effects and the toxicity of these patients with alimentary canal tumor treated with photodynamic method by using hematoporphyrin derivation (HPD) in Vitro irritated.
研究表明，光动力学治疗可能通过杀死或诱导凋亡，改变了肿瘤细胞的生物学特性，提高了肿瘤细胞的免疫原性。
The study declares PDT change the biological character of tumor cells, enhances immunogenicity by inducing tumor cell apoptosis or killing tumor cell directly.
光动力学疗法已用于多种肿瘤的局部治疗，研究表明光动力学疗法可诱导宿主产生抗肿瘤免疫应答。
As a local therapeutic modality, photodynamic therapy (PDT) has been applied to various cancers. Preclinical studies have shown that PDT induces the host anti-tumor immune response.
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