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NCI-H196 is a small-cell lung cancer (SCLC) cell line used to study the mechanisms of cancer progression, chemotherapy resistance, and cellular responses to oxidative stress. Research involving NCI-H196 has demonstrated its sensitivity to the cytotoxic effects of pyrrolidine dithiocarbamate (PDTC), a pro-oxidant agent. PDTC induces S-phase cell cycle arrest and significantly reduces the viability of NCI-H196 cells in a dose-dependent manner. This cytotoxicity is attributed to the induction of oxidative stress, as evidenced by increased reactive oxygen species (ROS) and changes in the expression of oxidative stress-related genes. The addition of antioxidants like N-acetyl-L-cysteine (NAC) can effectively reverse PDTC-induced cytotoxicity, confirming the role of oxidative stress in cell death.
Further studies have shown that PDTC enhances the cytotoxicity of cisplatin, a first-line chemotherapy drug used for SCLC treatment. Combining low doses of cisplatin with non-toxic concentrations of PDTC leads to synergistic cytotoxicity in NCI-H196 cells. This combination therapy is believed to be effective due to PDTC’s downregulation of ATP7A, a copper efflux transporter associated with cisplatin resistance. By inhibiting ATP7A, PDTC may increase intracellular copper and sensitize NCI-H196 cells to cisplatin, highlighting its potential as an adjunct therapy for SCLC.
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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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