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Current Drug Delivery


ISSN (Print): 1567-2018
ISSN (Online): 1875-5704

Research Article

Chloroquine Assisted Delivery of microRNA Mimic Let-7b to NSCLC Cell Line by PAMAM (G5) - HA Nano-Carrier

Author(s): Niloufar Maghsoudnia, Reza Baradaran Eftekhari, Alireza Naderi Sohi and Farid Abedin Dorkoosh*

Volume 18, Issue 1, 2021

Published on: 04 August, 2020

Page: [31 - 43] Pages: 13

DOI: 10.2174/1567201817666200804105017

Price: $65


Aim: Polyamidoamine (PAMAM) dendrimers are attracting interest of the scientists as vehicles for nucleic acid delivery due to their suitable properties. The highly positive surface charged of PAMAM enables an adequate interaction with negatively charged microRNAs.

Purpose: The purpose of this study is to investigate the anti-tumor effect of microRNA Mimic let-7b loaded in PAMAM dendrimers (G5) on Non-Small Cell Lung Cancer (NSCLC) cells.

Objective: In order to increase the anti-tumor effect, chloroquine is employed to enhance the endosomal escape which is counted as a limitation in the advancement of gene delivery. Nanoparticles (NPs) were coated with natural polysaccharide "Hyaluronic Acid (HA)" to develop biodegradable carriers with targeting moiety for over-expressed CD44 receptors on NSCLC cells. The size and zeta potential measurements, gel retardation, cellular uptake, cell viability and gene expression studies were investigated for the designed delivery system.

Results: DLS analysis showed monodispersed small nanoparticles, which was in agreement with TEM results. Remarkably, NPs in the cells pretreated with chloroquine exhibited the highest cytotoxicity and were capable of inducing apoptosis. In cellular uptake study, NPs labeled with Fluorescein Isothiocyanate (FITC), were successfully taken up in cancer cells. Moreover, the expression study of three genes linked with cancer initiation and development in NSCLC, including KRAS, p-21, and BCL-2 indicated a decrease in KRAS and BCL-2 (oncogenic and anti-apoptotic genes) and increase in p-21 (apoptotic gene).

Conclusion: All factors considered, the results declare that application of let-7b-loaded PAMAM-HA NPs in combination with chloroquine can be a promising therapeutic option in cancer cells inhibition. This fact has frequently been highlighted by many researchers upon the potentials of micro RNA delivery in cancer cells.

Keywords: Gene-delivery, NSCLC, PAMAM dendrimers, microRNA let-7b, chloroquine, cancer cells.

Graphical Abstract
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