NCI-H1299 Cells

NCI-H1299, also known as H1299, is a human non-small cell lung cancer (NSCLC) cell line established from a lymph node metastasis derived from an adult male patient with lung carcinoma. Along with H292 cells, H1299 is widely used as an NSCLC model in cancer biology and immuno-oncology research. The cell line exhibits an epithelial-like morphology characterized by adherent, flattened cells with a thickness of less than 5 µm and an approximate doubling time of 22–30 hours. H1299 cells express keratin and vimentin but are negative for neurofilament triplet protein, reflecting a phenotype with both epithelial and mesenchymal characteristics.

Genetically, H1299 cells harbor a homozygous partial deletion in the TP53 gene, resulting in complete loss of p53 protein expression. The line is also characterized by wild-type KRAS status, distinguishing it from other NSCLC models such as A549 cells, which carry endogenous KRAS mutations. Due to the absence of functional p53 signaling combined with intact KRAS, H1299 cells are frequently used to study tumor suppressor biology, oncogenic signaling pathways, apoptosis, metastasis, and therapeutic resistance mechanisms. Compared with more epithelial NSCLC cell lines such as A549, H1299 cells display a more mesenchymal phenotype with reduced epithelial marker expression, making them particularly useful for investigations into epithelial-to-mesenchymal transition (EMT), invasion, and metastatic progression.

H1299 cells have also been reported to synthesize the neuropeptide neuromedin B (NMB) at low levels, while lacking detectable gastrin-releasing peptide (GRP) production. Their robust growth characteristics, high transfectability, and well-characterized molecular background have contributed to their broad use in studies involving targeted therapies, gene editing, immune-mediated cytotoxicity, and downstream KRAS-associated signaling pathways. As with all long-term cultured tumor cell models, periodic authentication and confirmation of key molecular features are recommended to ensure experimental reproducibility.