Hyaluronic acid and polyethylenimine self-assembled polyion complexes as pH-sensitive drug carrier for cancer therapy

•The PICs had negatively charged surface and were stable in physiological milieu.•The PICs could load small molecules and induce targeted drug delivery.•The PICs could behave pH responsive drug release behavior. In this study, a series of polyion complexes (PICs) were prepared via electrostatic inte...

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