Published in:
01-12-2011 | Original Research
Immunohistochemical Detection of Autotaxin (ATX)/Lysophospholipase D (lysoPLD) in Submucosal Invasive Colorectal Cancer
Authors:
Shinsuke Kazama, Joji Kitayama, Junken Aoki, Ken Mori, Hirokazu Nagawa
Published in:
Journal of Gastrointestinal Cancer
|
Issue 4/2011
Login to get access
Abstract
Purpose
Autotaxin (ATX) is molecularly identical to lysophospholipase D (lysoPLD) and is a main enzyme producing lysophosphatidic acid (LPA), which mediates a broad range of cellular responses including stimulation of cell motility.
Patients and Methods
Using immunohistochemical staining, we examined the expression of ATX/lysoPLD in 98 cases of early colorectal cancer with submucosal invasion. ATX/lysoPLD was highly expressed in infiltrating cells in tumor tissue in the submucosal layer, which were characterized as mast cells.
Results
The number of ATX/lysoPLD-positive cells was significantly greater in tumors with a macroscopically depressed lesion than in tumors without depression. The density of ATX/lysoPLD-positive cells tended to have a positive correlation with microvessel vascular density (MVD), while it was not correlated with vessel invasion and nodal metastases as well as lymphovascular vessel density (LVD).
Conclusion
Our results suggest that local production of LPA through ATX/lysoPLD may weakly correlate with formation of a depressive lesion and tumor angiogenesis in the early stage of colorectal cancer.