Abstract
There are few case reports describing small cell lung carcinoma (SCLC), which secrete parathyroid hormone (PTH)-related protein (PTHrP) and result in hypercalcemia. We have established a novel cell line, derived from a 37-year-old woman with SCLC, which produced PTH, PTH-rP, and a part of proopiomelanocortin (POMC), and led to hypercalcemia. The cell line, named SS-1, was grown as floating cell clusters in DMEM/F12 medium supplemented with 10% fetal bovine serum and had a population doubling time of 72 h. The modal chromosome number was 47 (88%); marker chromosomes were not observed. The SS-1 cell line secreted not only PTHrP but also PTH, and both were decreased by CaCl2 administration. Decreasing the concentration of Ca++ in the growth medium stimulated the secretion of both PTHrP and PTH. The cell line had calcium sensing receptor (Cas-R). Since PTHrP and PTH secretion from the SS-1 cells was related to Ca++ concentration in the growth medium, the cell line might be useful for the study of PTH-rP and PTH regulation as well as for SCLC analysis. In addition, the cells secreted N terminal POMC, the precursor of adrenocorticotropic hormone, in response to stimulation with corticotropin releasing hormone. In summary, we established a novel cell line, SS-1 from SCLC, which produced PTHrP, PTH and N terminal POMC.
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Ishikawa, M., Kimura, K., Tachibana, T. et al. Establishment and characterization of a novel cell line derived from a human small cell lung carcinoma that secretes parathyroid hormone, parathyroid hormone-related protein, and pro-opiomelanocortin. Hum Cell 23, 58–64 (2010). https://doi.org/10.1111/j.1749-0774.2010.00082.x
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DOI: https://doi.org/10.1111/j.1749-0774.2010.00082.x