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Background: In the discovery of DNA intercalators, β-carbolines compose one member of the most interesting alkaloid family and are of clinical importance. In the efforts, N-(3-benzyloxycarbonyl-β-carboline-1-yl)ethyl-Ser-Ala-OBzl (BCESA) was designed as a nano-scaled DNA intercalator without Dox-like toxicity. Methods: Based on the structural analysis and CDOCKER energy comparison, BCESA was rationally designed as such a nano-scaled intercalator. The anti-tumor activity, the toxicity and the tumor targeting action of BCESA were evaluated on mouse models. Results: The in vitro proliferation of cancer cells, but not non-cancer cells, was effectively inhibited by BCESA. On S180 mouse model BCESA dose-dependently slowed the tumor growth, and 0.01 μmol/kg/day was found as a minimal effective dose. Both BCESA and its moiety were found in the tumor tissue, but not in the organs and the blood, of S180 mice. Conclusion: BCESA should be a nano-scaled intercalator capable of targeting tumor tissue to release anti-tumoral β-carboline-3-carboxylic acid and its 1-methyl derivative, while Ser-Ala-OBzl is a simple and desirable carrier.

international journal of nanomedicine

&lt;p&gt;BCESA: a nano-scaled intercalator capable of targeting tumor tissue and releasing anti-tumoral &amp;beta;-carboline-3-carboxylic acid&lt;/p&gt;