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Liposome Circulation Time is Prolonged by CD47 Coating.

Hayat, SMG, Jaafari, MR, Hatamipour, M, Penson, P and Sahebkar, A (2020) Liposome Circulation Time is Prolonged by CD47 Coating. Protein & Peptide Letters, 27 (1). ISSN 0929-8665

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INTRODUCTION: Bio-degradable nano-particles have many applications as drug delivery vehicles because of their good bio-availability, controlled release, low toxicity and potential for encapsulation. However, the most important obstacle to nanoparticulate drug delivery is elimination by macrophages which reduces the residence time of nanoparticles in the blood. To overcome this problem, the surface of the nanoparticle can be passivated by coating with Polyethylene glycol (PEG). However, the use of PEG has its own disadvantages. CD47 receptor acts as a self marker on the surface of many cells and inhibits phagocytosis. This study used a CD47 mimicry peptide as a substitute for PEG to fabricate "stealth" nanoliposome with reduced macrophage clearance. METHODS: Doxorubibin was used as a model drug because of its inherent fluorescence. Doxorubicin-containing liposomes were coated with different percentages of CD47 mimicry peptide (0.5% and 1%). PEGfunctionalized doxorubicin-containing liposomes, were used as a comparator. The liposomal formulations were intravenously injected into mice. Serum was collected at pre-defined time points and tissue samples were taken at 24 hours. Fluorescence was used to determine the concentration doxorubicin in serum, heart, spleen, kidney, liver and lung tissues. RESULTS: Tissue biodistribution and serum kinetic studies indicated that compared with PEG, the use of CD47 mimicry peptide increased the circulation time of doxorubicin in the circulation. Moreover, unwanted accumulation of doxorubicin in the reticuloendothelial tissues (liver and spleen), kidney and heart was significantly decreased by the CD47 mimicry peptide. CONCLUSION: The use of a CD47 mimicry peptide on the surface of nanoliposomes improved the residence time of liposomal doxorubicin in the circulation. The accumulation of drug in non-target tissues was reduced, thereby potentially reducing toxicity.

Item Type: Article
Uncontrolled Keywords: 0304 Medicinal and Biomolecular Chemistry, 0601 Biochemistry and Cell Biology
Subjects: Q Science > QD Chemistry
Q Science > QH Natural history > QH301 Biology
R Medicine > RM Therapeutics. Pharmacology
Divisions: Pharmacy & Biomolecular Sciences
Publisher: Bentham Science Publishers
Related URLs:
Date Deposited: 05 May 2020 11:57
Last Modified: 04 Sep 2021 07:21
DOI or ID number: 10.2174/0929866527666200413100120
URI: https://researchonline.ljmu.ac.uk/id/eprint/12880
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