Abstract
In this report milk-derived exosomes have been investigated for oral delivery of the chemotherapeutic drug paclitaxel (PAC) as an alternative to conventional i.v. therapy for improved efficacy and reduced toxicity. PAC-loaded exosomes (ExoPAC) were found to have a particle size of ~108 nm, a narrow particle size distribution (PDI ~0.190), zeta potential (~ −7 mV) and a practical loading efficiency of ~8%. Exosomes and ExoPAC exhibited excellent stability in the presence of simulated-gastrointestinal fluids, and during the storage at −80 °C. A sustained release of PAC was also observed up to 48 h in vitro using PBS (pH 6.8). Importantly, ExoPAC delivered orally showed significant tumor growth inhibition (60%; P < 0.001) against human lung tumor xenografts in nude mice. Treatment with i.p. PAC at the same dose as ExoPAC, however, showed modest but statistically insignificant inhibition (31%). Moreover, ExoPAC demonstrated remarkably lower systemic and immunologic toxicities as compared to i.v. PAC.
| Original language | English |
|---|---|
| Pages (from-to) | 1627-1636 |
| Number of pages | 10 |
| Journal | Nanomedicine: Nanotechnology, Biology, and Medicine |
| Volume | 13 |
| Issue number | 5 |
| DOIs | |
| State | Published - Jul 2017 |
Bibliographical note
Publisher Copyright:© 2017
Funding
Funding: This work was supported by the USPHS grant R41-CA-189517 and KSTC-184-512-15-209, and, in part, by Agnes Brown Duggan Endowment and Helmsley Trust Fund, awarded to RCG. Ramesh Gupta holds the Agnes Brown Duggan Chair in Oncological Research.
| Funders | Funder number |
|---|---|
| Agnes Brown Duggan Endowment | |
| Helmsley Trust Fund | |
| National Childhood Cancer Registry – National Cancer Institute | R41CA189517 |
| National Childhood Cancer Registry – National Cancer Institute | |
| U.S. Public Health Service | KSTC-184-512-15-209, R41-CA-189517 |
| U.S. Public Health Service |
Keywords
- Antitumor efficacy
- Exosomes
- Immunological responses
- Lung cancer
- Systemic toxicity
- Taxol
ASJC Scopus subject areas
- Bioengineering
- Medicine (miscellaneous)
- Molecular Medicine
- Biomedical Engineering
- General Materials Science
- Pharmaceutical Science