As a preclinical CRO specializing in oncology, Alfa Cytology provides overexpression cell line construction services to achieve stable, high-level expression of target genes in tumor cell models. By stably integrating target genes into the host cell genome, we generate high-expression cell lines that serve as powerful tools for gain-of-function studies, protein production, and ADC target development, accelerating the pace of your oncology research programs.
Overexpression cell lines are engineered cellular models in which exogenous target genes are stably integrated into the host cell genome, enabling long-term, high-level expression of the target protein. Unlike transient transfection, stable overexpression cell lines ensure that the target gene is continuously transmitted to progeny cells during cell division, thereby achieving sustained and stable protein expression. The construction of overexpression cell lines typically employs lentiviral transduction or non-viral vector systems to stably integrate the target gene expression cassette into the host cell chromosome, followed by antibiotic selection to enrich stably integrated positive clones. Through monoclonal screening and expansion, cell lines with high homogeneity and stable expression levels are ultimately obtained.
Overexpression cell lines are important tools for studying gene function, establishing disease models, and producing recombinant proteins. By achieving high-level stable expression of target proteins, researchers can thoroughly investigate the roles of genes in tumor initiation, progression, and metastasis, screen and validate drug targets, and provide critical reagents for antibody drug development and immunotherapy evaluation. Consequently, overexpression cell lines have become indispensable core tools in oncology drug discovery and development.
Fig. 1 Scheme for the generation of doxycycline (Dox) inducible CENP-A overexpression cell lines. (Sergazy S, et al.; 2025)
Leveraging our in-depth understanding of gene regulation and tumor biological mechanisms, Alfa Cytology provides professional overexpression cell line construction services dedicated to transforming your target gene research needs into stable, high-expression cellular models. With extensive engineering experience across diverse tumor cell lines, we ensure that every overexpression cell line we deliver exhibits high expression levels, genetic stability, and reliable biological functionality, providing a solid cellular foundation for your gain-of-function studies, target validation, and protein production applications.
| Service Step | Service Details | Turnaround Time |
|---|---|---|
| Expression Vector Construction and Optimization | Design target gene expression vectors with strong promoters (CMV/EF-1α) and optional fusion tags, and verify by sequencing.
|
2–3 weeks |
| Transfection and Stable Pool Selection | Transfect host cells, enrich stably transfected mixed pools through antibiotic selection, and cryopreserve early-passage stocks.
|
3–4 weeks |
| Single-Cell Isolation (Optional, upgradeable to monoclonal route) |
|
1 week |
| High-Expression Clone Screening and Expansion |
|
6–10 weeks |
| Stability Testing |
|
8–12 weeks |
| Cell Banking and Quality Release |
|
2–3 weeks |
Our overexpression cell line construction services support a broad spectrum of cancer types, providing high-expression cellular models for gain-of-function studies, target validation, and protein production, including but not limited to:
Ready to advance your oncology research with our overexpression cell line construction services? Whether you require HER2, TROP2, Nectin-4 overexpression cell lines for ADC target development or specific gene overexpression cell lines for gain-of-function studies, Alfa Cytology is fully prepared to assist you. Please contact us today to discuss your specific overexpression cell line needs and discover how our expertise can accelerate your oncology research programs.
Reference
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