Hyaluronic acid-targeted and pH-responsive drug delivery system based on metal-organic frameworks for efficient antitumor therapy

Biomaterials. 2019 Dec:223:119473. doi: 10.1016/j.biomaterials.2019.119473. Epub 2019 Sep 3.

Abstract

Drug delivery systems (DDSs) have emerged to help delivering the required cargo into the region of the tumor, achieving the objectives of extenuating the potential damage to the body and improving the therapeutic effectiveness. Here, we developed a one-pot process for encapsulating the unstable and hydrophobic d-α-Tocopherol succinate (α-TOS) in zeolitic imidazolate framework-8 (ZIF-8) compounds (defined as α-TOS@ZIF-8) and subsequently coated with a hyaluronic acid (HA) shell to form the HA/α-TOS@ZIF-8 nanoplatform. Of particular note was when the concentration of α-TOS is l mg/mL, the loading rate was high up to 43.03 wt%. The study verified that HA shell, which could act as a smart "switch" and tumor-targeted "guider", had the capacity for extending blood circulation, enhancing the tumor-specific accumulation of DDS via CD44-mediated pathway. HA shell could be disintegrated by hyaluronidase (HAase) in the tumor microenvironment (TME) and the wrapped α-TOS@ZIF-8 exposed, thus leading to the decomposition of ZIF-8 in tumor acidic microenvironment to release the loaded α-TOS. Therefore, the HA/α-TOS@ZIF-8 nanoplatform has been achieved as a tumor-specific and on-demand drug delivery system, which improved the treatment efficiency.

Keywords: CD44; Drug delivery systems; Hyaluronic acid; Zeolitic imidazolate framework-8; d-α-tocopherol succinate.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antineoplastic Agents / administration & dosage*
  • Biocompatible Materials
  • Drug Carriers
  • Drug Delivery Systems*
  • Female
  • HeLa Cells
  • Hemolysis
  • Humans
  • Hyaluronan Receptors / metabolism
  • Hyaluronic Acid / chemistry*
  • Hydrogen-Ion Concentration
  • Imidazoles / chemistry
  • Light
  • Metal-Organic Frameworks*
  • Mice
  • Microscopy, Electron, Transmission
  • Nanotechnology / methods
  • Neoplasm Transplantation
  • Scattering, Radiation
  • Temperature
  • Tumor Microenvironment
  • Zeolites / chemistry
  • alpha-Tocopherol / chemistry*

Substances

  • Antineoplastic Agents
  • Biocompatible Materials
  • CD44 protein, human
  • Drug Carriers
  • Hyaluronan Receptors
  • Imidazoles
  • Metal-Organic Frameworks
  • acidified zeolitic imidazolate framework-8
  • Zeolites
  • Hyaluronic Acid
  • alpha-Tocopherol