A nanobody targeting carcinoembryonic antigen as a promising molecular probe for non-small cell lung cancer
نویسندگان
چکیده
Carcinoembryonic antigen (CEA) is a biomarker and therapy target for non‑small cell lung cancer (NSCLC), which is the most common type of lung cancer. Nanobodies with high target specificity are promising candidates to function as anti‑CEA probes. In the present study, the targeting effects of an anti‑CEA nanobody obtained from phage display were investigated using technetium‑99 m (99mTc) and fluorescence labeling. In vitro binding and immunofluorescent staining assays, as well as in vivo blood clearance and biodistribution assays were performed. High specificity and affinity of the nanobody for CEA‑positive H460 cells was observed in vitro. The pharmacokinetics assay of the 99mTc‑nanobody in Wistar rats demonstrated that the nanobody had appropriate T1/2α and T1/2β, which were 20.2 and 143.5 min, respectively. The biodistribution assay using H460 xenograft‑bearing nude mice demonstrated a high ratio of signal in tumor compared with background, which confirmed that the nanobody may be useful as a molecular probe for CEA‑positive cancer, particularly in NSCLC.
منابع مشابه
Engineered Jurkat Cells for Targeting Prostate-Specific Membrane Antigen on Prostate Cancer Cells by Nanobody-Based Chimeric Antigen Receptor
Background: Recently, modification of T cells with chimeric antigen receptor (CAR) has been an attractive approach for adoptive immunotherapy of cancers. Typically, CARs contain a single-chain variable domain fragment (scFv). Most often, scfvs are derived from a monoclonal antibody of murine origin and may be a trigger for host immune system that leads to the T-cell clearance. Nanobody is a spe...
متن کاملTargeting Colorectal Cancer Cell Lines Using Nanobodies; AgSK1as a Potential Target
Background: Colorectal cancer is the third most common type of aggressive cancers. Chemotherapy, surgery,and radiotherapy are the common therapeutic options for treating this cancer. Due to the adverse side-eff ects of these methods, immunotherapy is considered as an appropriate alternative therapeutic option. Treatment through the application of monoclonal antibodies is considered as a n...
متن کاملIdentification of a Novel Tumor-Binding Peptide for Lung Cancer Through in-vitro Panning
Tumor-targeted therapies are playing growing roles in cancer research. The exploitation of these powerful therapeutic modalities largely depends on the discovery of tumor-targeting ligands. Phage display has proven a promising high throughput screening tool for the identification of novel specific peptides with high binding affinity to cancer cells. In the present study, we describe the use of ...
متن کاملIdentification of a Novel Tumor-Binding Peptide for Lung Cancer Through in-vitro Panning
Tumor-targeted therapies are playing growing roles in cancer research. The exploitation of these powerful therapeutic modalities largely depends on the discovery of tumor-targeting ligands. Phage display has proven a promising high throughput screening tool for the identification of novel specific peptides with high binding affinity to cancer cells. In the present study, we describe the use of ...
متن کاملIn vivo immunotherapy of lung cancer using cross-species reactive vascular endothelial growth factor nanobodies
Objective(s): Lung cancer is the main leading cause of cancer death worldwide. Angiogenesis is the main step in proliferation and spreading of tumor cells. Targeting vascular endothelial growth factor (VEGF) is an effective approach for inhibition of cancer angiogenesis. Nanobodies (NBs) are a novel class of antibodies derived from the camel. Unique characteristics of Nbs like their small size ...
متن کامل