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Clinical and Vaccine Immunology, February 2008, p. 243-252, Vol. 15, No. 2
1071-412X/08/$08.00+0     doi:10.1128/CVI.00328-07
Copyright © 2008, American Society for Microbiology. All Rights Reserved.

Differentiation of C2D Macrophage Cells after Adoptive Transfer{triangledown}

Betsey E. Potts,1 Marcia L. Hart,1 Laura L. Snyder,1 Dan Boyle,1 Derek A. Mosier,2 and Stephen K. Chapes1*

Division of Biology,1 Department of Diagnostic Medicine and Pathobiology, Kansas State University, Manhattan, Kansas 665062

Received 8 August 2007/ Returned for modification 7 October 2007/ Accepted 5 December 2007

C2D macrophage cells protect immunocompromised mice from experimentally induced pneumonias after intraperitoneal (i.p.) adoptive transfer. These macrophage cells are immature and display minimal activity in vitro. Therefore, we wanted to understand how adoptive transfer affected these cells. We believe that the in vivo environment affects the phenotypic and functional characteristics of macrophages that help maintain the physiological integrity of the host. To test this hypothesis, we characterized the trafficking patterns and cellular changes of the established macrophage C2D cell line after adoptive transfer. We examined phenotypic changes of the C2D macrophage cells in vivo with and without stimulation with gamma interferon (IFN-{gamma}). After in vivo i.p. adoptive transfer, C2D macrophage cells trafficked to the lungs, spleen, lymph nodes, and bone marrow of recipient mice. The cells were detected for as long as 2 months, and the cells expressed increased levels of CD11b, c-fms, and F4/80 on their surface, becoming more differentiated macrophages compared to cells maintained in vitro. Upon in vivo stimulation with IFN-{gamma}, c-fms levels decreased while Gr-1 levels increased compared to in vivo, unstimulated, phosphate-buffered saline-injected controls. These responses were independent of the genetic backgrounds of the recipient mice. These data support the hypothesis and indicate that C2D macrophage cells respond to in vivo signals that are absent during in vitro culture.

* Corresponding author. Mailing address: Division of Biology, Kansas State University, 116 Ackert Hall, Manhattan, KS 66506-4901. Phone: (785) 532-6795. Fax: (785) 532-6653. E-mail: skcbiol{at}ksu.edu

{triangledown} Published ahead of print on 19 December 2007.

Clinical and Vaccine Immunology, February 2008, p. 243-252, Vol. 15, No. 2
1071-412X/08/$08.00+0     doi:10.1128/CVI.00328-07
Copyright © 2008, American Society for Microbiology. All Rights Reserved.





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