Identification of ATP synthase beta subunit (ATPB) on the cell surface as a non-small cell lung cancer (NSCLC) associated antigen
| Autor: | Jinliang Yang, Wei Wang, Qi-fang Song, Feng Luo, Zhiyong Qian, Qi Song, Lantu Gou, Yu Quan Wei, Sa-sa Jiang, Lijuan Chen, Gao-hua Zhang, Zejun Lu, Bin Kan |
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| Jazyk: | angličtina |
| Předmět: |
Cancer Research
Lung Neoplasms medicine.drug_class medicine.medical_treatment Blotting Western non-small cell lung cancer (NSCLC) Monoclonal antibody lcsh:RC254-282 Mice Antigen Antibody Specificity Carcinoma Non-Small-Cell Lung medicine Biomarkers Tumor Genetics Animals Humans Mice Inbred BALB C biology Cancer Antibodies Monoclonal Immunotherapy Mitochondrial Proton-Translocating ATPases lcsh:Neoplasms. Tumors. Oncology. Including cancer and carcinogens medicine.disease Molecular biology Immunohistochemistry Squamous carcinoma respiratory tract diseases Oncology Spectrometry Mass Matrix-Assisted Laser Desorption-Ionization biology.protein Adenocarcinoma Female Antibody Research Article |
| Zdroj: | BMC Cancer BMC Cancer, Vol 9, Iss 1, p 16 (2009) |
| ISSN: | 1471-2407 |
| DOI: | 10.1186/1471-2407-9-16 |
| Popis: | Background Antibody-based immuneotherapy has achieved some success for cancer. But the main problem is that only a few tumor-associated antigens or therapeutic targets have been known to us so far. It is essential to identify more immunogenic antigens (especially cellular membrane markers) for tumor diagnosis and therapy. Methods The membrane proteins of lung adenocarcinoma cell line A549 were used to immunize the BALB/c mice. A monoclonal antibody 4E7 (McAb4E7) was produced with hybridoma technique. MTT cell proliferation assay was carried out to evaluate the inhibitory effect of McAb4E7 on A549 cells. Flow cytometric assay, immunohistochemistry, western blot and proteomic technologies based on 2-DE and mass spectrometry were employed to detect and identify the corresponding antigen of McAb4E7. Results The monoclonal antibody 4E7 (McAb4E7) specific against A549 cells was produced, which exhibited inhibitory effect on the proliferation of A549 cells. By the proteomic technologies, we identified that ATP synthase beta subunit (ATPB) was the corresponding antigen of McAb4E7. Then, flow cytometric analysis demonstrated the localization of the targeting antigen of McAb4E7 was on the A549 cells surface. Furthermore, immunohistochemstry showed that the antigen of McAb4E7 mainly aberrantly expressed in tumor cellular membrane in non-small cell lung cancer (NSCLC), but not in small cell lung cancer (SCLC). The rate of ectopic expressed ATPB in the cellular membrane in lung adenocarcinoma, squamous carcinoma and their adjacent nontumourous lung tissues was 71.88%, 66.67% and 25.81% respectively. Conclusion In the present study, we identified that the ectopic ATPB in tumor cellular membrane was the non-small cell lung cancer (NSCLC) associated antigen. ATPB may be a potential biomarker and therapeutic target for the immunotherapy of NSCLC. |
| Databáze: | OpenAIRE |
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