Potentiation of the anti-tumour effects of Photofrin-based photodynamic therapy by localized treatment with G-CSF.
Br J Cancer
; 82(8): 1485-91, 2000 Apr.
Article
em En
| MEDLINE
| ID: mdl-10780531
ABSTRACT
Photofrin-based photodynamic therapy (PDT) has recently been approved for palliative and curative purposes in cancer patients. It has been demonstrated that neutrophils are indispensable for its anti-tumour effectiveness. We decided to evaluate the extent of the anti-tumour effectiveness of PDT combined with administration of granulocyte colony-stimulating factor (G-CSF) as well as the influence of Photofrin and G-CSF on the myelopoiesis and functional activity of neutrophils in mice. An intensive treatment with G-CSF significantly potentiated anti-tumour effectiveness of Photofrin-based PDT resulting in a reduction of tumour growth and prolongation of the survival time of mice bearing two different tumours colon-26 and Lewis lung carcinoma. Moreover, 33% of C-26-bearing mice were completely cured of their tumours after combined therapy and developed a specific and long-lasting immunity. The tumours treated with both agents contained more infiltrating neutrophils and apoptotic cells then tumours treated with either G-CSF or PDT only. Importantly, simultaneous administration of Photofrin and G-CSF stimulated bone marrow and spleen myelopoiesis that resulted in an increased number of neutrophils demonstrating functional characteristics of activation. Potentiated anti-tumour effects of Photofrin-based PDT combined with G-CSF observed in two murine tumour models suggest that clinical trials using this tumour therapy protocol would be worth pursuing.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Fotoquimioterapia
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Adenocarcinoma
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Fator Estimulador de Colônias de Granulócitos
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Éter de Diematoporfirina
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Neoplasias do Colo
Tipo de estudo:
Guideline
/
Prognostic_studies
Limite:
Animals
/
Humans
Idioma:
En
Revista:
Br J Cancer
Ano de publicação:
2000
Tipo de documento:
Article