Estimation of angiogenesis with anti-CD105 immunostaining in the process of colorectal cancer development.
BACKGROUND
The expression of panendothelial markers (eg, CD34, CD31, and factor VIII) is not always observed in angiogenic vessels, and such markers are not useful for measuring angiogenesis. In contrast, CD105 is preferentially expressed in angiogenic vessels and thus may be valuable for measuring angiogenesis. We hypothesized that microvessel quantification by means of CD105 might be useful for measuring angiogenesis in the colorectal adenoma-carcinoma sequence.


METHODS
We immunohistochemically investigated 54 cases of colorectal adenomas and 20 cases of carcinomas using monoclonal antibodies CD34 and CD105, and microvessel density (MVD) was counted at x200 magnification.


RESULTS
Microvessels positive for CD34 were distributed almost uniformly in adenomas. In contrast, microvessels positive for CD105 were preferentially observed in the surface area of adenomas. In carcinomas, CD34 stained only a proportion of blood vessels that were positive for CD105. No significant difference of MVD for CD34 was observed in the colorectal adenoma-carcinoma sequence. In contrast, an increment of MVD for CD105 from low-grade to high-grade dysplasia (P <.0001) and that from high-grade dysplasia to carcinomas (P <.05) was statistically significant.


CONCLUSIONS
Assessing neovascularization with CD105 in the process of colorectal cancer development may thus be a valuable marker for predicting the risk of colorectal cancer development.
Akagi
Kazunari
K
Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
Ikeda
Yoichi
Y
Sumiyoshi
Yasushi
Y
Kimura
Yasue
Y
Kinoshita
Junko
J
Miyazaki
Mitsuhiro
M
Abe
Toru
T
D000236:Adenoma / Q000737:chemistry / Q000473:pathology*; D000906:Antibodies; D015703:Antigens, CD; D018952:Antigens, CD34 / Q000032:analysis / Q000276:immunology; D002277:Carcinoma / Q000737:chemistry / Q000473:pathology; D015179:Colorectal Neoplasms / Q000737:chemistry / Q000473:pathology*; D000071063:Endoglin; D006801:Humans; D008833:Microcirculation; D009389:Neovascularization, Pathologic / Q000473:pathology*; D011956:Receptors, Cell Surface; D019010:Vascular Cell Adhesion Molecule-1 / Q000032:analysis* / Q000276:immunology
D000906:Antibodies; D015703:Antigens, CD; D018952:Antigens, CD34; C064206:ENG protein, human; D000071063:Endoglin; D011956:Receptors, Cell Surface; D019010:Vascular Cell Adhesion Molecule-1