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NCI-H157 is a human non-small cell lung carcinoma (NSCLC) cell line, primarily used in cancer research to study tumorigenesis, chemotherapy resistance, and the molecular pathways involved in lung cancer progression. NCI-H157 cells are particularly useful for investigating the role of hypoxia-inducible factor-1 alpha (HIF-1α) in NSCLC. Studies have shown that HIF-1α plays a crucial role in promoting angiogenesis, proliferation, and survival of cancer cells under hypoxic conditions. Downregulation of HIF-1α via siRNA in NCI-H157 cells significantly reduces cell proliferation, induces apoptosis, and impairs the invasive ability of the tumor cells.
Moreover, combination treatments using HIF-1α siRNA and chemotherapy agents, such as cisplatin (DDP), enhance the cytotoxic effects on NCI-H157 cells. The reduction of HIF-1α expression has been shown to increase the activity of apoptotic proteins like caspases 3 and 9 while decreasing the levels of anti-apoptotic proteins such as Bcl-2. Additionally, HIF-1α knockdown inhibits key signaling pathways involved in tumor growth, including the PI3K/AKT and Raf/MEK/ERK pathways. These molecular alterations contribute to the suppression of tumor cell survival and invasiveness.
The NCI-H157 cell line is also responsive to various natural compounds and plant extracts. For example, extracts from *Stellera chamaejasme* L. have been found to induce apoptosis in NCI-H157 cells through the Fas death receptor pathway, further emphasizing the cell line's utility in evaluating novel therapeutic agents for lung cancer.
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- cultureMedium: RPMI 1640, w: 2.0 mM stable Glutamine, w: 2.0 g/L NaHCO3 (Cytion article number 820700a)
- supplements: Supplement the medium with 10% FBS
- dissociationReagent: Accutase
- subculturing: Remove the old medium from the adherent cells and wash them with PBS that lacks calcium and magnesium. For T25 flasks, use 3-5 ml of PBS, and for T75 flasks, use 5-10 ml. Then, cover the cells completely with Accutase, using 1-2 ml for T25 flasks and 2.5 ml for T75 flasks. Let the cells incubate at room temperature for 8-10 minutes to detach them. After incubation, gently mix the cells with 10 ml of medium to resuspend them, then centrifuge at 300xg for 3 minutes. Discard the supernatant, resuspend the cells in fresh medium, and transfer them into new flasks that already contain fresh medium.
- freezeMedium: As a cryopreservation medium, use complete growth medium (including FBS) + 10% DMSO for adequate post-thaw viability, or CM-1 (Cytion catalog number 800100), which includes optimized osmoprotectants and metabolic stabilizers to enhance recovery and reduce cryo-induced stress.
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