Fig. 5From: An ultra-stable redox-controlled self-assembling polypeptide nanotube for targeted imaging and therapy in cancerCytotoxicity evaluation using MTT assay. a HeLa, b MDAMB231. The IC50 of nanotube-DOX for HeLa is 0.69 µM and free DOX is 0.78 µM. In the case of MDAMB231, IC50 of nanotube-DOX is 3.45 µM and free DOX is 3.97 µM. suggesting the nanotube-DOX matches the efficiency of DOX with minimal cytotoxicityBack to article page