Iranian
Biomedical Journal
Volume 27, Issue 5 (9-2023)
IBJ 2023, 27(5): 269-279 |
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Mohammadkhani N, Rahimpour A, Hoseinpoor R, Rajabibazl M. Development of Stable CHO-K1 Cell Lines Overexpressing Full Length Human CD20 Antigen. IBJ 2023; 27 (5) :269-279
URL: http://ibj.pasteur.ac.ir/article-1-3916-en.html
URL: http://ibj.pasteur.ac.ir/article-1-3916-en.html
Abstract:
Background: CD20 is a differentiation-related antigen exclusively expressed on the membrane of B lymphocytes. CD20 amplification is observed in numerous immune-related disorders, making it an ideal target for immunotherapy of hematological malignancies and autoimmune diseases. MAb-based therapies targeting CD20 have a principal role in the treatment of several immune-related disordes and cancers, including CLL. Fc gamma receptors mediate CD20 internalization in hematopoietic cells; therefore, this study aimed to establish non-hematopoietic stable cell lines overexpressing full-length human CD20 antigen as an in vitro model for CD20-related studies.
Methods: CD20 gene was cloned into the transfer vector. The lentivirus system was transfected to packaging HEK 293T cells, and the supernatants were harvested. CHO-K1 cells were transduced using recombinant viruses, and a stable cell pool was developed by the antibiotic selection. CD20 expression was confirmed at the mRNA and protein levels.
Results: Simultaneous expression of GFP protein facilitated the detection of CD20-expressing cells. Immunophenotyping analysis of stable clones demonstrated expression of CD20 antigen. In addition, the mean fluorescence intensity was significantly higher in the CD20-CHO-K1 clones than the wild-type CHO-K1 cells.
Conclusion: This study is the first report on using second-generation lentiviral vectors for the establishment of a non-hematopoietic cell-based system, which stably expresses full-length human CD20 antigen. Results of stable CHO cell lines with different levels of CD20 antigen are well suited to be
used for CD20-based investigations, including binding and functional assays.
Methods: CD20 gene was cloned into the transfer vector. The lentivirus system was transfected to packaging HEK 293T cells, and the supernatants were harvested. CHO-K1 cells were transduced using recombinant viruses, and a stable cell pool was developed by the antibiotic selection. CD20 expression was confirmed at the mRNA and protein levels.
Results: Simultaneous expression of GFP protein facilitated the detection of CD20-expressing cells. Immunophenotyping analysis of stable clones demonstrated expression of CD20 antigen. In addition, the mean fluorescence intensity was significantly higher in the CD20-CHO-K1 clones than the wild-type CHO-K1 cells.
Conclusion: This study is the first report on using second-generation lentiviral vectors for the establishment of a non-hematopoietic cell-based system, which stably expresses full-length human CD20 antigen. Results of stable CHO cell lines with different levels of CD20 antigen are well suited to be
used for CD20-based investigations, including binding and functional assays.
Type of Study: Full Length/Original Article |
Subject:
Medical Biotechnology
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