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Hierarchical assembly of hyaluronan coated albumin nanoparticles for pancreatic cancer chemoimmunotherapy

Abstract

Pancreatic cancer is a highly malignant carcinoma with limited effective treatment options resulting in poor patient survival rate of less than 5%. In this study, cationic albumin nanoparticles were assembled with negatively charged hyaluronic acid (HA) to achieve a hierarchical nanostructure and efficient delivery of small molecule drugs to the tumor site in pancreas. A combination of chemotherapy with indoleamine-2,3-dioxygenase (IDO) inhibition was explored to enhance the chemotherapeutic efficacy in vivo. Hydrophobic celastrol (CLT) and hydrophilic 1-methyltryptophan (MT) were concurrently loaded in HA coated cationic albumin nanoparticles (HNPs) with an average size of ~300 nm. The size of HNPs was reduced in the presence of hyaluronidase to facilitate penetration into deep tumor tissues. Also, the biodistribution study in C57BL/6 mice xenograft model showed enhanced tumor accumulation and prolonged circulation of HNPs. Compared with CLT solution, the combination of CLT with MT showed significantly enhanced tumor inhibition in both xenograft and orthotopic pancreatic cancer mice models via downregulating the immunosuppressive tumor microenvironment. Taken together, the combination of CLT with MT administered via HNPs represents a highly promising strategy for targeted pancreatic cancer therapy.

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Supplementary files

Publication details

The article was received on 30 Apr 2019, accepted on 25 Jul 2019 and first published on 30 Jul 2019


Article type: Paper
DOI: 10.1039/C9NR03684A
Nanoscale, 2019, Accepted Manuscript

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    Hierarchical assembly of hyaluronan coated albumin nanoparticles for pancreatic cancer chemoimmunotherapy

    Y. Hu, X. Chen, Y. Xu, X. Han, M. Wang, T. Gong, Z. Zhang, J. Kao and Y. Fu, Nanoscale, 2019, Accepted Manuscript , DOI: 10.1039/C9NR03684A

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