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LNCaP
LNCaP cells are a cell line of human cells commonly used in the field of oncology. LNCaP cells are androgen-sensitive human prostate adenocarcinoma cells derived from the left supraclavicular lymph node metastasis from a 50-year-old caucasian male in 1977. They are adherent epithelial cells growing in aggregates and as single cells.
One major obstacle to the conducting the most clinically relevant prostate cancer (PCa) research has been the lack of cell lines that closely mimic human disease progression. Two hallmarks of metastatic human prostate cancer include the shift of aggressive PCa from androgen-sensitivity to an Androgen Insensitive (AI) state, and the propensity of PCa to metastasize to bone. Although the generation of AI cell lines has been quite successful as demonstrated in the “classic” cell lines DU145 and PC3, the behavior of these cells in bone does not fully mimic clinical human disease. It is well established that human PCa bone metastasis form osteoblastic lesions rather than osteolytic lesions seen in other cancers like breast cancer. Similarly, PC-3 and DU145 cells form osteolytic tumors. To develop an AI-PCa cell model that more closely mimics clinical disease, LNCaP sublines have been generated to provide the most clinically relevant tissue culture tools to date.
==History==
The LNCaP cell line was established from a metastatic lesion of human prostatic adenocarcinoma. The LNCaP cells grow readily in vitro (up to 8 x 105 cells/sq cm; doubling time, 60 hr), form clones and are highly resistant to human fibroblast interferon.〔 LNCaP cells have a modal chromosome number of 76 to 91, indicative of a human male karyotype with several marker chromosomes〔 The malignant properties of LNCaP cells are maintained in athymic nude mice which develop tumors at the injection site and show a similar doubling time ''in vivo''.〔
High-affinity specific androgen and estrogen receptors are present in the cytosol and nuclear fractions.〔 The LNCaP line is hormonally responsive, shown by ''in vitro'' 5 alpha-dihydrotestosterone modulation of cell growth and acid phosphatase production.〔 LNCaP cells also express Prostate Specific Antigen (PSA).〔 ''In vivo'', Male mice develop tumors earlier and at a greater frequency than do females and hormonal manipulations show that the frequency of tumor development correlates with serum androgen levels.〔 The rate of the tumor growth, however, is independent of the gender or hormonal status of the host.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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