[The Construction of ROR1 Targeting Chimeric Antigen Receptor Modified T Cells and Its Killing Effect for ROR1-positive Tumor Cells].
Sichuan Da Xue Xue Bao Yi Xue Ban
; 50(2): 145-151, 2019 Mar.
Article
em Zh
| MEDLINE
| ID: mdl-31106530
ABSTRACT
OBJECTIVE:
To test the killing effect of type â receptor tyrosine kinase-like orphan receptor (ROR1) chimeric antigen receptor T cell (CAR-T) on several ROR1-expressing tumor cells in vitro.METHODS:
The CAR gene was designed and synthesized by constructing the lentiviral vector plasmid, and BamHâ /EcoRâ was used to identify the plasmid. The expression levels of ROR1 among a variety of tumor cell lines were compared using flow cytometry (FCM). The killing effect of CAR-T on positive cells was detected by FCM, the LDH assay and ELISA.RESULTS:
The double enzyme digestion identified CAR gene was successfully constructed to the lentivirus vector plasmid. FCM detection showed that the efficiency of CAR-T infection was about 47.23%. Multiple tumor cells expressed ROR1 in varying degrees. The FCM and the LDH assay indicated that CAR-T specifically killed ROR1-positive tumor cells. On positive target cells, more interferonI-γ (FN-γ) could be released during the CAR-T killing process than control T (P<0.05).CONCLUSION:
We successfully constructed ROR1 CAR-T. CAR-T can specifically kill ROR1-positive tumor cells and cause the release of large amounts of IFN-γ, providing an experimental basis for clinical application.Palavras-chave
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Base de dados:
MEDLINE
Assunto principal:
Receptores de Antígenos de Linfócitos T
/
Linfócitos T
/
Imunoterapia Adotiva
/
Receptores Órfãos Semelhantes a Receptor Tirosina Quinase
/
Receptores de Antígenos Quiméricos
Idioma:
Zh
Ano de publicação:
2019
Tipo de documento:
Article