Background: Neuroendocrine molecules are now believed to play a significant role in the progression of human prostate cancer (CaP), especially in the androgen-independent stage. Materials and methods: In the present study, we evaluated the presence and the function of the receptors for neuropeptide Y (NPY) in human CaP cell lines (the androgen-dependent LNCaP, and the androgen-independent DU 145 and PC-3). Results: The presence of high-affinity binding sites for NPY was shown on PC-3 cells (radioreceptor assay). Reverse transcription-polymerase chain reaction analysis indicated that these sites correspond to the Y1 and Y2 receptor isoforms. A Y1 receptor protein (70 kDa) was also detected in PC-3 cell extracts by Western blot analysis. The activation of these receptors by NPY resulted in a reduction of forskolin-induced cAMP accumulation and an increase of [Ca2+]i. Moreover, a prolonged treatment with NPY induced a dose-related proliferation of PC-3 cells. Conclusions: By showing that NPY receptors are expressed in the androgen-independent cell line PC-3 and that their activation results in cell proliferation, the present date suggest that NPY-related mechanisms might be relevant in certain stages of CaP, such as the progression of the disease during the androgen-independent stage.
Expression of neuropeptide Y receptors in human prostate cancer cells / P. Magni, M. Motta. - In: ANNALS OF ONCOLOGY. - ISSN 0923-7534. - 12:Suppl. 2(2001), pp. S27-S29. [10.1093/annonc/12.suppl_2.S27]
Expression of neuropeptide Y receptors in human prostate cancer cells
P. Magni
;M. MottaUltimo
2001
Abstract
Background: Neuroendocrine molecules are now believed to play a significant role in the progression of human prostate cancer (CaP), especially in the androgen-independent stage. Materials and methods: In the present study, we evaluated the presence and the function of the receptors for neuropeptide Y (NPY) in human CaP cell lines (the androgen-dependent LNCaP, and the androgen-independent DU 145 and PC-3). Results: The presence of high-affinity binding sites for NPY was shown on PC-3 cells (radioreceptor assay). Reverse transcription-polymerase chain reaction analysis indicated that these sites correspond to the Y1 and Y2 receptor isoforms. A Y1 receptor protein (70 kDa) was also detected in PC-3 cell extracts by Western blot analysis. The activation of these receptors by NPY resulted in a reduction of forskolin-induced cAMP accumulation and an increase of [Ca2+]i. Moreover, a prolonged treatment with NPY induced a dose-related proliferation of PC-3 cells. Conclusions: By showing that NPY receptors are expressed in the androgen-independent cell line PC-3 and that their activation results in cell proliferation, the present date suggest that NPY-related mechanisms might be relevant in certain stages of CaP, such as the progression of the disease during the androgen-independent stage.File | Dimensione | Formato | |
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