BACKGROUND: The secretory epithelial cells of the prostate gland use sophisticated vehicles in the form of prostasomes to relay important information to sperm cells in semen. This prostasome-forming and secretory ability of the epithelial cells is also preserved in poorly differentiated prostate cancer cells. The aim of the present investigation was to conduct a proteomic analysis of metastasis-derived prostasomes. MATERIALS AND METHODS: We investigated prostasomes from vertebral metastases of prostate cancer by 2-dimensional electrophoresis and matrix-assisted laser desorption-ionization time-of-flight (MALDI-TOF) protein characterization. RESULTS: Twenty-five unique protein spots were identified by MALDI-TOF and another five proteins were determined by mass spectrometry (MS)/MS. Annexins A1, A3 and A5, as well as dimethylarginine dimethylaminohydrolase 1 were among the identified proteins. The annexins and dimethylarginine dimethylaminohydrolase 1 found in cancer-derived prostasomes can act, among others, as angiogenic factors and can increase the vascular development in the neighbourhood of the tumour. CONCLUSION: Cancer-derived prostasomes may play an important role in the interaction between tumour cells and their environment.
BACKGROUND: The secretory epithelial cells of the prostate gland use sophisticated vehicles in the form of prostasomes to relay important information to sperm cells in semen. This prostasome-forming and secretory ability of the epithelial cells is also preserved in poorly differentiated prostate cancer cells. The aim of the present investigation was to conduct a proteomic analysis of metastasis-derived prostasomes. MATERIALS AND METHODS: We investigated prostasomes from vertebral metastases of prostate cancer by 2-dimensional electrophoresis and matrix-assisted laser desorption-ionization time-of-flight (MALDI-TOF) protein characterization. RESULTS: Twenty-five unique protein spots were identified by MALDI-TOF and another five proteins were determined by mass spectrometry (MS)/MS. Annexins A1, A3 and A5, as well as dimethylarginine dimethylaminohydrolase 1 were among the identified proteins. The annexins and dimethylarginine dimethylaminohydrolase 1 found in cancer-derived prostasomes can act, among others, as angiogenic factors and can increase the vascular development in the neighbourhood of the tumour. CONCLUSION:Cancer-derived prostasomes may play an important role in the interaction between tumour cells and their environment.
Authors: Laura Corrigan; Siamak Redhai; Aaron Leiblich; Shih-Jung Fan; Sumeth M W Perera; Rachel Patel; Carina Gandy; S Mark Wainwright; John F Morris; Freddie Hamdy; Deborah C I Goberdhan; Clive Wilson Journal: J Cell Biol Date: 2014-08-25 Impact factor: 10.539
Authors: Steven L Wood; Margaret A Knowles; Douglas Thompson; Peter J Selby; Rosamonde E Banks Journal: Nat Rev Urol Date: 2013-02-26 Impact factor: 14.432
Authors: Simona Principe; E Ellen Jones; Yunee Kim; Ankit Sinha; Julius O Nyalwidhe; Jasmin Brooks; O John Semmes; Dean A Troyer; Raymond S Lance; Thomas Kislinger; Richard R Drake Journal: Proteomics Date: 2013-04-23 Impact factor: 3.984