| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
¶
From the Departments of Dermatology,* Pharmacology, The Program in Molecular and Cellular Oncology, and The Center for Microscopy and Image Analysis,|| The George Washington University Medical Center, Washington, District of Columbia; the National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland; the Department of Pathology and Comprehensive Cancer Center, University of Alabama, Birmingham, Alabama; the Jake Gittlen Cancer Research Institute,¶ The Pennsylvania State University College of Medicine, Hershey, Pennsylvania; and Free University of Brussels,** Belgium
Previous studies have demonstrated that some tumor cells occupy a pericyte-like location in melanoma, forming angio-tumoral complexes. We hypothesized that these tumor cells are migrating along the abluminal surface of the endothelium, a mechanism termed "extravascular migratory metastasis." In the present study, we have used human and murine melanoma cells that stably express enhanced green fluorescence protein (GFP) to examine, in an ex vivo co-culture model, melanoma cell interactions with vessels that have sprouted from rat aortic rings. We also used in vivo tumor growth on the chick chorioallantoic membrane (CAM) to observe the dissemination pathway of melanoma cells. In the ex vivo rat aorta system, we observed a pericyte-like location of tumor cells that were spreading along the vascular channels. For examination of the CAM in vivo, we have used the Lugassy preparation, allowing one to obtain striking images of the relationship between fluorescent GFP cells and microvessels. Melanoma cells were found cuffing the outside of vessels around the tumor. Tumor cells were observed along the vessels several centimeters from the tumor. Confocal microscopy and histopathology confirmed the pericyte-like location of tumor cells, without any observable intravasation. The results indicate that melanoma cells can migrate along the abluminal surface of vessels. This study also demonstrates that these models can provide quantitation analysis that may prove useful in elucidating the molecular interactions involved in extravascular migratory metastasis.
This article has been cited by other articles:
 |
|
 |
|
  K. Yamauchi, M. Yang, P. Jiang, M. Xu, N. Yamamoto, H. Tsuchiya, K. Tomita, A. R. Moossa, M. Bouvet, and R. M. Hoffman Development of Real-time Subcellular Dynamic Multicolor Imaging of Cancer-Cell Trafficking in Live Mice with a Variable-Magnification Whole-Mouse Imaging System. Cancer Res., April 15, 2006; 66(8): 4208 - 4214. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
E. I. Deryugina, A. Zijlstra, J. J. Partridge, T. A. Kupriyanova, M. A. Madsen, T. Papagiannakopoulos, and J. P. Quigley Unexpected Effect of Matrix Metalloproteinase Down-Regulation on Vascular Intravasation and Metastasis of Human Fibrosarcoma Cells Selected In vivo for High Rates of Dissemination Cancer Res., December 1, 2005; 65(23): 10959 - 10969. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 D. van Poll, J. F. Thompson, M. H. Colman, J. G. McKinnon, R. P. M. Saw, J. R. Stretch, R. A. Scolyer, and R. F. Uren A Sentinel Node Biopsy Does Not Increase the Incidence of In-Transit Metastasis in Patients With Primary Cutaneous Melanoma Ann. Surg. Oncol., August 1, 2005; 12(8): 597 - 608. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
