Johnson C, Fan H. Three-dimensional culture of an ovine pulmonary adenocarcinoma-derived cell line results in re-expression of surfactant proteins and Jaagsiekte sheep retrovirus.
Virology 2011;
414:91-6. [PMID:
21481432 DOI:
10.1016/j.virol.2011.03.018]
[Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2011] [Revised: 02/24/2011] [Accepted: 03/18/2011] [Indexed: 11/16/2022]
Abstract
Jaagsiekte sheep retrovirus (JSRV) is the causative agent of ovine pulmonary adenocarcinoma (OPA) in sheep. A major interest is elucidating the mechanism(s) of transformation by the viral envelope (Env) that functions as an oncogene. These studies would benefit from a cell line derived from type II pneumocytes that have maintained the differentiation state. In this study we used an OPA-derived cell line (JS7), which has lost structural and functional properties of type II pneumocytes, and no longer expresses JSRV when grown in 2-D monolayer culture. When JS7 cells were placed in 3-D culture using Matrigel, they grew as small spheres of polarized cells that re-expressed surfactant proteins characteristic of type II pneumocytes. Moreover, JS7 cells grown in 3-D re-expressed JSRV virus by several criteria. This study underscores the importance of the culture environment on maintaining the differentiation state of OPA tumor cells as well as expression of JSRV.
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