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Σημαντική δημοσίευση από την ομάδα Γ. Σταθόπουλου, Πανεπιστήμιο Πατρών

Δημοσίευση σημαντικής εργασίας από ομάδα της Ιατρικής Πατρών με υπεύθυνο τον Αναπλ. Καθηγητή Γιώργο Σταθόπουλο στο πολύ έγκριτο ιατρικό περιοδικό "The Journal of Clinical Investigation" (5-year impact factor: 14.69; 2013/2014: 13.765).

Περισσότερες πληροφορίες για το άρθρο:
J Clin Invest. 2015 Apr 27. pii: 79840. doi: 10.1172/JCI79840. [Epub ahead of print]
Mast cells mediate malignant pleural effusion formation.
Giannou AD, Marazioti A, Spella M, Kanellakis NI, Apostolopoulou H, Psallidas I, Prijovich ZM, Vreka M, Zazara DE, Lilis I, Papaleonidopoulos V, Kairi CA, Patmanidi AL, Giopanou I, Spiropoulou N, Harokopos V, Aidinis V, Spyratos D, Teliousi S, Papadaki H, Taraviras S, Snyder LA, Eickelberg O, Kardamakis D, Iwakura Y, Feyerabend TB, Rodewald HR, Kalomenidis I, Blackwell TS, Agalioti T, Stathopoulos GT.

Abstract
Mast cells (MCs) have been identified in various tumors; however, the role of these cells in tumorigenesis remains controversial. Here, we quantified MCs in human and murine malignant pleural effusions (MPEs) and evaluated the fate and function of these cells in MPE development. Evaluation of murine MPE-competent lung and colon adenocarcinomas revealed that these tumors actively attract and subsequently degranulate MCs in the pleural space by elaborating CCL2 and osteopontin. MCs were required for effusion development, as MPEs did not form in mice lacking MCs, and pleural infusion of MCs with MPE-incompetent cells promoted MPE formation. Once homed to the pleural space, MCs released tryptase AB1 and IL-1β, which in turn induced pleural vasculature leakiness and triggered NF-κB activation in pleural tumor cells, thereby fostering pleural fluid accumulation and tumor growth. Evaluation of human effusions revealed that MCs are elevated in MPEs compared with benign effusions. Moreover, MC abundance correlated with MPE formation in a human cancer cell-induced effusion model. Treatment of mice with the c-KIT inhibitor imatinib mesylate limited effusion precipitation by mouse and human adenocarcinoma cells. Together, the results of this study indicate that MCs are required for MPE formation and suggest that MC-dependent effusion formation is therapeutically addressable.

 

 


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