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Jin C, Kang YJ, Park SR, Oh YJ, Ko K. Production, expression, and function of dual-specific monoclonal antibodies in a single plant. PLANTA 2023; 259:15. [PMID: 38071691 DOI: 10.1007/s00425-023-04284-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Accepted: 11/07/2023] [Indexed: 12/18/2023]
Abstract
MAIN CONCLUSION LSC CO17-1AK and anti-HER2 VHH-FcK can be produced in a single plant and exhibit anti-tumor activities comparable to those of their respective parent antibodies. Recombinant monoclonal antibodies (mAbs) which can be applied to treat various cancers, are primarily produced using mammalian, insect, and bacteria cell culture systems. Plant expression systems have also been developed to produce antibodies. Plant expression systems present several advantages, including a lack of human pathogenic agents, efficient production costs, and easy large-scale production. In this study, we generated a transgenic plant expressing anti-colorectal cancer large single chain (LSC) CO17-1AK and anti-human epidermal growth factor receptor 2 (HER2) VHH-FcK mAbs by cross-pollinating plants expressing LSC CO17-1AK and anti-HER2 VHH-FcK, respectively. F1 siblings expressing both LSC CO17-1AK and anti-HER2 VHH-FcK were screened using polymerase chain reaction and Western-blot analyses. The cell enzyme-linked immunosorbent assay (Cell ELISA) confirmed the binding of LSC CO17-1AK and anti-HER2 VHH-FcK to target proteins in the SW620 human colorectal cancer and the SKBR-3 human breast cancer cell lines, respectively. The wound healing assay confirmed the inhibitory activity of both antibodies against SW620 and SKBR-3 cell migration, respectively. In conclusion, both LSC CO17-1AK mAb and anti-HER2 VHH-FcK can be produced in a single plant, achieve binding activities to SW620 and SKBR-3 cancer cells, and inhibitory activity against SW620 and SKBR-3 cell migration similar to their parental antibodies, respectively.
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Affiliation(s)
- Caiquan Jin
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul, 06974, South Korea
| | - Yang Joo Kang
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul, 06974, South Korea
| | - Se Ra Park
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul, 06974, South Korea
- Department of Pathology, University of Michigan, Ann Arbor, 48109, USA
| | - Yoo Jin Oh
- Department of Applied Experimental Biophysics, Johannes Kepler University Linz, Linz, 4040, Austria
| | - Kisung Ko
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul, 06974, South Korea.
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Oh S, Kim K, Kang YJ, Hwang H, Kim Y, Hinterdorfer P, Kim MK, Ko K, Lee YK, Kim DS, Myung SC, Ko K. Co-transient expression of PSA-Fc and PAP-Fc fusion protein in plant as prostate cancer vaccine candidates and immune responses in mice. PLANT CELL REPORTS 2023; 42:1203-1215. [PMID: 37269373 DOI: 10.1007/s00299-023-03028-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 05/04/2023] [Indexed: 06/05/2023]
Abstract
KEY MESSAGE PAP-FcK and PSA-FcK prostate cancer antigenic proteins transiently co-expressed in plant induce their specific humoral immune responses in mice. Prostate-specific antigen (PSA) and prostatic acid phosphatase (PAP) have been considered as immunotherapeutic antigens for prostate cancer. The use of a single antigenic agent is unlikely to be effective in eliciting immunotherapeutic responses due to the heterogeneous and multifocal nature of prostate cancer. Thus, multiple antigens have been combined to enhance their anti-cancer effects. In the current study, PSA and PAP were fused to the crystallizable region (Fc region) of immunoglobulin G1 and tagged with KDEL, the endoplasmic reticulum (ER) retention signal motif, to generate PSA-FcK and PAP-FcK, respectively, and were transiently co-expressed in Nicotiana benthamiana. Western blot analysis confirmed the co-expression of PSA-FcK and PAP-FcK (PSA-FcK + PAP-FcK) with a 1:3 ratios in the co-infiltrated plants. PSA-FcK, PAP-FcK, and PSA-FcK + PAP-FcK proteins were successfully purified from N. benthamiana by protein A affinity chromatography. ELISA showed that anti-PAP and anti-PSA antibodies successfully detected PAP-FcK and PSA-FcK, respectively, and both detected PSA-FcK + PAP-FcK. Surface plasmon resonance (SPR) analysis confirmed the binding affinity of the plant-derived Fc fusion proteins to FcγRI/CD64. Furthermore, we also confirmed that mice injected with PSA-FcK + PAP-FcK produced both PSA- and PAP-specific IgGs, demonstrating their immunogenicity. This study suggested that the transient plant expression system can be applied to produce the dual-antigen Fc fusion protein (PSA-FcK + PAP-FcK) for prostate cancer immunotherapy.
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Affiliation(s)
- Soyeon Oh
- Department of Medical Science, College of Medicine, Chung-Ang University, Seoul, South Korea
| | - Kibum Kim
- Department of Medical Science, College of Medicine, Chung-Ang University, Seoul, South Korea
| | - Yang Joo Kang
- Department of Medical Science, College of Medicine, Chung-Ang University, Seoul, South Korea
| | - Hyunjoo Hwang
- Department of Medical Science, College of Medicine, Chung-Ang University, Seoul, South Korea
| | - Yerin Kim
- Department of Medical Science, College of Medicine, Chung-Ang University, Seoul, South Korea
| | - Peter Hinterdorfer
- Institute of Biophysics, Johannes Kepler University, 4020, Linz, Austria
| | - Mi Kyung Kim
- Department of Pathology, College of Medicine, Chung-Ang University, Seoul, South Korea
| | - Kinarm Ko
- Department of Stem Cell Biology, Konkuk University School of Medicine, Konkuk University, Seoul, South Korea
| | - Young Koung Lee
- Institute of Plasma Technology, Korea Institute of Fusion Energy, 37 Dongjangsan-ro, Gunsan-si, 54004, South Korea
| | - Do-Sun Kim
- Vegetable Research Division, National Institute of Horticultural and Herbal Science, Rural Development Administration, Wanju-gun, South Korea
| | - Soon Chul Myung
- Department of Urology, College of Medicine, Chung-Ang University, Seoul, South Korea
| | - Kisung Ko
- Department of Medical Science, College of Medicine, Chung-Ang University, Seoul, South Korea.
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CHOI HE, LEE JI, JO SY, CHAE YC, LEE JH, SUN HJ, KO K, HONG S, KONG KH. Functional expression of the sweet-tasting protein brazzein in transgenic tobacco. FOOD SCIENCE AND TECHNOLOGY 2022. [DOI: 10.1590/fst.40521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Song I, Lee YK, Kim JW, Lee SW, Park SR, Lee HK, Oh S, Ko K, Kim MK, Park SJ, Kim DH, Kim MS, Kim DS, Ko K. Effect of an Endoplasmic Reticulum Retention Signal Tagged to Human Anti-Rabies mAb SO57 on Its Expression in Arabidopsis and Plant Growth. Mol Cells 2021; 44:770-779. [PMID: 34711693 PMCID: PMC8560589 DOI: 10.14348/molcells.2021.2002] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2020] [Revised: 08/20/2021] [Accepted: 08/27/2021] [Indexed: 11/30/2022] Open
Abstract
Transgenic Arabidopsis thaliana expressing an anti-rabies monoclonal antibody (mAb), SO57, was obtained using Agrobacterium-mediated floral dip transformation. The endoplasmic reticulum (ER) retention signal Lys-Asp-Glu-Leu (KDEL) was tagged to the C-terminus of the anti-rabies mAb heavy chain to localize the mAb to the ER and enhance its accumulation. When the inaccurately folded proteins accumulated in the ER exceed its storage capacity, it results in stress that can affect plant development and growth. We generated T1 transformants and obtained homozygous T3 seeds from transgenic Arabidopsis to investigate the effect of KDEL on plant growth. The germination rate did not significantly differ between plants expressing mAb SO57 without KDEL (SO plant) and mAb SO57 with KDEL (SOK plant). The primary roots of SOK agar media grown plants were slightly shorter than those of SO plants. Transcriptomic analysis showed that expression of all 11 ER stress-related genes were not significantly changed in SOK plants relative to SO plants. SOK plants showed approximately three-fold higher mAb expression levels than those of SO plants. Consequently, the purified mAb amount per unit of SOK plant biomass was approximately three times higher than that of SO plants. A neutralization assay revealed that both plants exhibited efficient rapid fluorescent focus inhibition test values against the rabies virus relative to commercially available human rabies immunoglobulins. KDEL did not upregulate ER stress-related genes; therefore, the enhanced production of the mAb did not affect plant growth. Thus, KDEL fusion is recommended for enhancing mAb production in plant systems.
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Affiliation(s)
- Ilchan Song
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Young Koung Lee
- Plasma Technology Research Center, National Fusion Research Institute, Gunsan 54004, Korea
| | - Jin Wook Kim
- Department of Urology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Seung-Won Lee
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Se Ra Park
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Hae Kyung Lee
- Division of Zoonotic and Vector Borne Diseases Research, Korea National Institute of Health, Osong 28159, Korea
| | - Soyeon Oh
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Kinarm Ko
- Department of Stem Cell Biology, Konkuk University School of Medicine, Seoul 05029, Korea
| | - Mi Kyung Kim
- Department of Pathology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Soon Ju Park
- Division of Biological Sciences, Wonkwang University, Iksan 54538, Korea
| | - Dae Heon Kim
- Department of Biology, Sunchon National University, Sunchon 57922, Korea
| | - Moon-Soo Kim
- Department of Chemistry, Western Kentucky University, Bowling Green, KY 42101, USA
| | - Do Sun Kim
- Vegetable Research Division, National Institute of Horticultural and Herbal Science, Rural Development Administration (RDA), Wanju 55365, Korea
| | - Kisung Ko
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea
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Kim K, Kang YJ, Park SR, Kim DS, Lee SW, Ko K, Ponndorf D, Ko K. Effect of leaf position and days post-infiltration on transient expression of colorectal cancer vaccine candidate proteins GA733-Fc and GA733-FcK in Nicotiana benthamiana plant. PeerJ 2021; 9:e10851. [PMID: 33868796 PMCID: PMC8035899 DOI: 10.7717/peerj.10851] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 01/06/2021] [Indexed: 12/15/2022] Open
Abstract
Immunization with thetumor-associated antigen GA733 glycoprotein, which is highly expressed in colorectal cancer, is considered to be a promising strategy for cancer prevention and treatment. We cloned a fusion gene of GA733 and immunoglobulin Fc fragment (GA733-Fc), and that of GA733-Fc and an endoplasmic reticulum retention motif (GA733-FcK) into the Cowpea mosaic virus (CPMV)-based transient plant expression vector, pEAQ-HT. Agrobacterium tumefaciens (LBA4404) transformed with the vectors pEAQ-HT-GA733-Fc and pEAQ-HT-GA733-FcK was infiltrated into the leaves of Nicotiana benthamiana plants. To optimize harvesting of leaf to express therapeutic glycoproteins both spatially and temporally, protein expression levels at various leaf positions (top, middle, and base) and days post-infiltration (dpi) were investigated. The GA733-Fc and GA733-FcK genes were detected in leaves at 1–10 dpi using PCR. As assessed by western blot, GA733-Fc and GA733-FcK were expressed at the highest levels in the top leaf position at 5 dpi, and GA733-FcK was expressed more than GA733-Fc. The proteins were successfully purified from infiltrated N. benthamiana leaves using protein A affinity chromatography. ELISA verified that an anti-GA733 antibody recognized both purified proteins. Thus, a functional GA733-Fc colorectal cancer vaccine protein can be transiently expressed using a CPMV virus-based vector, with an optimized expression time and leaf position post-infiltration.
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Affiliation(s)
- Kibum Kim
- Department of Medicine, Therapeutic Protein Engineering Lab, College of Medicine, Chung-Ang University, Seoul, South Korea
| | - Yang Joo Kang
- Department of Medicine, Therapeutic Protein Engineering Lab, College of Medicine, Chung-Ang University, Seoul, South Korea
| | - Se Ra Park
- Department of Medicine, Therapeutic Protein Engineering Lab, College of Medicine, Chung-Ang University, Seoul, South Korea
| | - Do-Sun Kim
- Vegetable Research Division, National Institute of Horticultural and Herbal Science, Rural Development Administration, Wanju-gun, South Korea
| | - Seung-Won Lee
- Department of Medicine, Therapeutic Protein Engineering Lab, College of Medicine, Chung-Ang University, Seoul, South Korea
| | - Kinarm Ko
- Department of Stem Cell Biology, Konkuk University School of Medicine, Konkuk University, Seoul, South Korea
| | - Daniel Ponndorf
- Department of Biological Chemistry, John Innes Centre, Norwich Research Park, Colney, Colney, Norwich, UK
| | - Kisung Ko
- Department of Medicine, Therapeutic Protein Engineering Lab, College of Medicine, Chung-Ang University, Seoul, South Korea
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Lee YR, Lim CY, Lim S, Park SR, Hong JP, Kim J, Lee HE, Ko K, Kim DS. Expression of Colorectal Cancer Antigenic Protein Fused to IgM Fc in Chinese Cabbage ( Brassica rapa). PLANTS 2020; 9:plants9111466. [PMID: 33143243 PMCID: PMC7693566 DOI: 10.3390/plants9111466] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 10/22/2020] [Accepted: 10/23/2020] [Indexed: 12/11/2022]
Abstract
The epithelial cell adhesion molecule (EpCAM) is a tumor-associated antigen and a potential target for tumor vaccine. The EpCAM is a cell-surface glycoprotein highly expressed in colorectal carcinomas. The objective of the present study is to develop an edible vaccine system through Agrobacterium-mediated transformation in Chinese cabbage (Brassica rapa). For the transformation, two plant expression vectors containing genes encoding for the EpCAM recombinant protein along with the fragment crystallizable (Fc) region of immunoglobulin M (IgM) and Joining (J)-chain tagged with the KDEL endoplasmic reticulum retention motif (J-chain K) were constructed. The vectors were successfully transformed and expressed in the Chinese cabbage individually using Agrobacterium. The transgenic Chinese cabbages were screened using genomic polymerase chain reaction (PCR) in T0 transgenic plant lines generated from both transformants. Similarly, the immunoblot analysis revealed the expression of recombinant proteins in the transformants. Further, the T1 transgenic plants were generated by selfing the transgenic plants (T0) carrying EpCAM-IgM Fc and J-chain K proteins, respectively. Subsequently, the T1 plants generated from EpCAM-IgM Fc and J-chain K transformants were crossed to generate F1 plants carrying both transgenes. The presence of both transgenes was validated using PCR in the F1 plants. In addition, the expression of Chinese cabbage-derived EpCAM-IgM Fc × J-chain K was evaluated using immunoblot and ELISA analyses in the F1 plants. The outcomes of the present study can be utilized for the development of a potential anti-cancer vaccine candidate using Chinese cabbage.
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Affiliation(s)
- Ye-Rin Lee
- Vegetable Research Division, National Institute of Horticultural and Herbal Science, Rural Development Administration, Wanju-gun 55365, Korea; (Y.-R.L.); (C.-Y.L.); (J.-P.H.); (J.K.); (H.-E.L.)
| | - Chae-Yeon Lim
- Vegetable Research Division, National Institute of Horticultural and Herbal Science, Rural Development Administration, Wanju-gun 55365, Korea; (Y.-R.L.); (C.-Y.L.); (J.-P.H.); (J.K.); (H.-E.L.)
| | - Sohee Lim
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea; (S.L.); (S.R.P.)
| | - Se Ra Park
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea; (S.L.); (S.R.P.)
| | - Jong-Pil Hong
- Vegetable Research Division, National Institute of Horticultural and Herbal Science, Rural Development Administration, Wanju-gun 55365, Korea; (Y.-R.L.); (C.-Y.L.); (J.-P.H.); (J.K.); (H.-E.L.)
| | - Jinhee Kim
- Vegetable Research Division, National Institute of Horticultural and Herbal Science, Rural Development Administration, Wanju-gun 55365, Korea; (Y.-R.L.); (C.-Y.L.); (J.-P.H.); (J.K.); (H.-E.L.)
| | - Hye-Eun Lee
- Vegetable Research Division, National Institute of Horticultural and Herbal Science, Rural Development Administration, Wanju-gun 55365, Korea; (Y.-R.L.); (C.-Y.L.); (J.-P.H.); (J.K.); (H.-E.L.)
| | - Kisung Ko
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea; (S.L.); (S.R.P.)
- Correspondence: (K.K.); (D.-S.K.); Tel.: +82-63-238-6670 (K.K.); +82-63-238-6670 (D.-S.K.)
| | - Do-Sun Kim
- Vegetable Research Division, National Institute of Horticultural and Herbal Science, Rural Development Administration, Wanju-gun 55365, Korea; (Y.-R.L.); (C.-Y.L.); (J.-P.H.); (J.K.); (H.-E.L.)
- Correspondence: (K.K.); (D.-S.K.); Tel.: +82-63-238-6670 (K.K.); +82-63-238-6670 (D.-S.K.)
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Lim S, Kim DS, Ko K. Expression of a Large Single-Chain 13F6 Antibody with Binding Activity against Ebola Virus-Like Particles in a Plant System. Int J Mol Sci 2020; 21:E7007. [PMID: 32977599 PMCID: PMC7582593 DOI: 10.3390/ijms21197007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Revised: 09/17/2020] [Accepted: 09/20/2020] [Indexed: 11/16/2022] Open
Abstract
Pathogenic animal and human viruses present a growing and persistent threat to humans worldwide. Ebola virus (EBOV) causes zoonosis in humans. Here, two structurally different anti-Ebola 13F6 antibodies, recognizing the heavily glycosylated mucin-like domain (MLD) of the glycoprotein (GP), were expressed in transgenic Nicotiana tabacum plants and designed as inexpensive and effective diagnostic antibodies against Ebola virus disease (EVD). The first was anti-EBOV 13F6 full size antibody with heavy chain (HC) and light chain (LC) (monoclonal antibody, mAb 13F6-FULL), while the second was a large single-chain (LSC) antibody (mAb 13F6-LSC). mAb 13F6-LSC was constructed by linking the 13F6 LC variable region (VL) with the HC of mAb 13F6-FULL using a peptide linker and extended to the C-terminus using the endoplasmic reticulum (ER) retention motif KDEL. Agrobacterium-mediated plant transformation was employed to express the antibodies in N. tabacum. PCR, RT-PCR, and immunoblot analyses confirmed the gene insertion, transcription, and protein expression of these antibodies, respectively. The antibodies tagged with the KDEL motif displayed high-mannose type N-glycan structures and efficient binding to EBOV-like particles (VLPs). Thus, various forms of anti-EBOV plant-derived mAbs 13F6-FULL and LSC with efficient binding affinity to EBOV VLP can be produced in the plant system.
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Affiliation(s)
- Sohee Lim
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea;
| | - Do-Sun Kim
- Vegetable Research Division, National Institute of Horticultural and Herbal Science, Rural Development Administration, Jeonju 55365, Korea;
| | - Kisung Ko
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea;
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Song I, Kang YJ, Kim DH, Kim MK, Ko K. Expression and in vitro function of anti-cancer mAbs in transgenic Arabidopsis thaliana. BMB Rep 2020. [PMID: 31234954 PMCID: PMC7196188 DOI: 10.5483/bmbrep.2020.53.4.106] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The anti-colorectal cancer monoclonal antibody CO17-1A (mAb CO), which recognizes the tumor-associated antigen EpCAM, was expressed in transgenic Arabidopsis plants. PCR and western blot analyses showed the insertion and expression of heavy chain (HC)/HC fused to the KDEL ER retention modif (HCK) and light chain (LC) of mAb CO and mAb CO with HCK (mAb COK) in Arabidopsis transformants. Both plant-derived mAbP CO and mAbP COK were purified from a biomass of approximately 1,000 seedlings grown in a greenhouse. In sandwich ELISA, both mAbP CO showed a slightly higher binding affinity for the target, EpCAM, compared to mAbM CO. In cell ELISA, both mAbsP COs showed binding affinity to the human colorectal cancer cell line SW480. Furthermore, mAbM CO, mAbP CO, and mAbP COK exhibited dose and time-dependent regression effects on SW480 cells in vitro. In summation, both mAbP CO and mAbP COK, expressed in Arabidopsis, recognized the target antigen EpCAM and showed anti-proliferative activity against human colorectal cancer cells.
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Affiliation(s)
- Ilchan Song
- Departments of Pathology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
- Departments of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Yang Joo Kang
- Departments of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Dae Heon Kim
- Department of Biology, Sunchon National University, Sunchon 57922, Korea
| | - Mi Kyung Kim
- Departments of Pathology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Kisung Ko
- Departments of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea
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Park SR, Lee JH, Kim K, Kim TM, Lee SH, Choo YK, Kim KS, Ko K. Expression and In Vitro Function of Anti-Breast Cancer Llama-Based Single Domain Antibody VHH Expressed in Tobacco Plants. Int J Mol Sci 2020; 21:E1354. [PMID: 32079309 PMCID: PMC7072948 DOI: 10.3390/ijms21041354] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 01/28/2020] [Accepted: 02/13/2020] [Indexed: 12/18/2022] Open
Abstract
Overexpression of human epidermal growth factor receptor type 2 (HER2) is considered as a prognostic factor of breast cancer, which is positively associated with recurrence when cancer metastasizes to the lymph nodes. Here, we expressed the single variable domain on a heavy chain (VHH) form of anti-HER2 camelid single domain antibody in tobacco plants and compared its in vitro anticancer activities with the anti-HER2 full size antibody. The gene expression cassette containing anti-HER2 camelid single domain antibody VHH fused to human IgG Fc region with KDEL endoplasmic reticulum (ER) (VHH-FcK) was transferred into the tobacco plant via the Agrobacterium-mediated transformation. The transformants were screened with polymerase chain reaction and Western blot analyses. Enzyme-linked immunosorbent assay (ELISA) confirmed the binding of the purified anti-HER2 VHH-FcK to the HER2-positive breast cancer cell line, SK-BR-3. Migration assay results confirmed anticancer activity of the plant-derived anticancer camelid single chain antibody. Taken together, we confirmed the possibility of using anti-HER2 VHH-FcK as a therapeutic anticancer agent, which can be expressed and assembled and purified from a plant expression system as an alternative antibody production system.
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Affiliation(s)
- Se Ra Park
- Department of Medicine, Medical Research Institute, College of Medicine, Chung-Ang University, Seoul 156-756, Korea; (S.R.P.); (J.-H.L.); (K.K.)
| | - Jeong-Hwan Lee
- Department of Medicine, Medical Research Institute, College of Medicine, Chung-Ang University, Seoul 156-756, Korea; (S.R.P.); (J.-H.L.); (K.K.)
| | - Kibum Kim
- Department of Medicine, Medical Research Institute, College of Medicine, Chung-Ang University, Seoul 156-756, Korea; (S.R.P.); (J.-H.L.); (K.K.)
- Department of Otorhinolaryngology-Head and Neck Surgery, Chung-Ang University College of Medicine, Seoul 156-756, Korea
| | - Taek Min Kim
- Major of Nano-Bioengineering, College of Life Sciences and Bioengineering, Incheon-National University, Incheon 22012, Korea; (T.M.K.); (S.H.L.)
| | - Seung Ho Lee
- Major of Nano-Bioengineering, College of Life Sciences and Bioengineering, Incheon-National University, Incheon 22012, Korea; (T.M.K.); (S.H.L.)
| | - Young-Kug Choo
- Department of Biological science, College of Natural Sciences, Wonkwang University, 460, Iksan-daero, Iksan-si, Jeollabuk-do 54538, Korea;
| | - Kyung Soo Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Chung-Ang University College of Medicine, Seoul 156-756, Korea
| | - Kisung Ko
- Department of Medicine, Medical Research Institute, College of Medicine, Chung-Ang University, Seoul 156-756, Korea; (S.R.P.); (J.-H.L.); (K.K.)
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