ONCOLYTIC ACTIVITY OF HUMAN ORTHOPNEUMOVIRUS IN CANCER CELL LINES.

Q3 Medicine
I M Aziz, R Bhat, M A Farrag, F N Almajhdi
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引用次数: 1

Abstract

Oncolytic virotherapy is an emerging biotherapeutic platform for selectively infecting cancer cells and triggering apoptosis in a number of malignant cells due to robust viral replication. Studies related to the oncolytic activity of human orthopneumovirus (hOPV) are conflicting.

Aim: This study was designed to elucidate the possible role of hOPV in the modulation of cell growth and apoptosis in cancer cell lines including human epidermoid carcinoma (HEp-2), lung epithelial cell line (A549), and breast cancer cell line (MCF-7).

Materials and methods: The oncolytic activity of hOPV on cancer cells was studied in vitro. The virus titers were determined by tissue culture infectious dose (TCID50/mL) in A549 cell. The cytotoxic effect of the virus on HEp-2, A549, and MCF-7 was determined using MTT and trypan blue dye exclusion test assays. hOPV in the infected cells was detected using real-time reverse transcription polymerase chain reaction (rRT-PCR) and indirect immunofluorescence (IIF) assays. The relative expression of apoptosis-related genes (CASP-3, -8, -9, Bax, Bcl-2, Bcl-XL, TP53, P21) during virus infection was estimated using rRT-PCR assay in comparison with the house-keeping gene (GAPDH).

Results: hOPV infection inhibited the growth of HEp-2, A549, and MCF-7 cells in a dose-and time-dependent manner. At a multiplicity of infection (MOI) of 5, hOPV reduced the viability of A549 cells to about 16%, HEp-2 to 22%, and MCF-7 to 28% (p = 0.001), while no significant inhibitory effect was observed when cells were infected at MOI of 1 and 2. hOPV mRNA and antigens were detected in infected HEp-2, A549, and MCF-7 cells by RT-PCR and IIF. Upon hOPV infection, expression of CASP-3, -8, -9, as well as Bax, TP53, and p21 mRNA increased while expression of Bcl-2, Bcl-xL anti-apoptotic genes decreased. In hOPV-infected A549 cells, the fold increase of CASP-8 and CASP-9, Bax, TP53, and P21 expression exceeded significantly compared to that in HEp-2 or MCF-7 cells.

Conclusions: Our results provide evidence that hOPV could be a potential candidate for oncolytic virotherapy.

人肺病毒在肿瘤细胞系中的溶瘤活性。
溶瘤病毒疗法是一种新兴的生物治疗平台,由于病毒的强大复制,它可以选择性地感染癌细胞并触发许多恶性细胞的凋亡。关于人正肺病毒(hOPV)溶瘤活性的研究存在矛盾。目的:本研究旨在阐明hOPV在人表皮样癌(HEp-2)、肺上皮细胞系(A549)和乳腺癌细胞系(MCF-7)细胞生长和凋亡调控中的可能作用。材料与方法:体外研究hOPV对肿瘤细胞的溶瘤活性。采用A549细胞组织培养感染剂量(TCID50/mL)测定病毒滴度。采用MTT和台盼蓝染料排除试验测定病毒对HEp-2、A549和MCF-7的细胞毒作用。采用实时逆转录聚合酶链反应(rRT-PCR)和间接免疫荧光(IIF)检测感染细胞的hOPV。采用rRT-PCR方法,比较病毒感染过程中凋亡相关基因(CASP-3、-8、-9、Bax、Bcl-2、Bcl-XL、TP53、P21)与看家基因(GAPDH)的相对表达量。结果:hOPV感染抑制HEp-2、A549和MCF-7细胞的生长,并呈剂量和时间依赖性。当感染多重倍数(multiplicity of infection, MOI)为5时,hOPV使A549细胞的活力降低16%左右,使HEp-2细胞的活力降低22%,使MCF-7细胞的活力降低28% (p = 0.001),而当感染多重倍数(multiplicity of infection, MOI)为1和2时,对A549细胞的活力没有明显的抑制作用。采用RT-PCR和IIF检测感染的HEp-2、A549和MCF-7细胞的hOPV mRNA和抗原。hOPV感染后,CASP-3、-8、-9及Bax、TP53、p21 mRNA表达升高,Bcl-2、Bcl-xL抗凋亡基因表达降低。在hopv感染的A549细胞中,CASP-8、CASP-9、Bax、TP53、P21的表达量明显高于HEp-2或MCF-7细胞。结论:我们的研究结果提供了hOPV可能是溶瘤病毒治疗的潜在候选者的证据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Experimental oncology
Experimental oncology Medicine-Oncology
CiteScore
1.40
自引率
0.00%
发文量
49
期刊介绍: The Experimental Oncology is an English-language journal that publishes review articles, original contributions, short communications, case reports and technical advances presenting new data in the field of experimental and fundamental oncology. Manuscripts should be written in English, contain original work, which has not been published or submitted for publication elsewhere. It also implies the transfer of the Copyright from the author to “Experimental Oncology”. No part of journal publications may be reproduced, stored in a retrieval system or transmitted in any form or by any means without the prior permission of the publisher.
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