Title : Vitamin D enhances the efficacy of photodynamic therapy in a murine model of breast cancer.

Pub. Date : 2015 May

PMID : 25712788






4 Functional Relationships(s)
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1 Here, we report that breast cancer nodules in mice can be effectively treated by preconditioning the tumors with 1alpha, 25-dihydroxyvitamin D3 (calcitriol; Vit D) prior to administering 5-aminolevulinate (ALA)-based PDT. Aminolevulinic Acid vitrin Mus musculus
2 The addition of Vit D increased intratumoral accumulation of protoporphyrin IX (PpIX) by 3.3 +- 0.5-fold, relative to mice receiving ALA alone. Aminolevulinic Acid vitrin Mus musculus
3 Vit D stimulated proliferation (10.7 +- 2.8-fold) and differentiation (9.62 +- 1.7-fold) in tumor cells, underlying an augmented cellular sensitivity to ALA-PDT. Aminolevulinic Acid vitrin Mus musculus
4 The observed enhancement of tumor responses to ALA-PDT after low, nontoxic doses of Vit D supports a new combination approach that deserves consideration in the clinical setting, and offers potential for improved remission of cutaneous breast cancer metastases. Aminolevulinic Acid vitrin Mus musculus