Microcirculatory alteration in low-grade gastric mucosa-associated lymphoma by Helicobacter heilmannii infection: its relation to vascular endothelial growth factor and cyclooxygenase-2.

Abstract:

BACKGROUND:There are clinical reports that Helicobacter heilmannii, as well as Helicobacter pylori, has been clinically reported to cause gastric low-grade mucosa-associated lymphoid tissue-type (MALT) lymphoma, although its precise mechanism remains to be clarified. Thus, the present study was undertaken to elucidate the alteration of the microcirculatory structure and the relation to angiogenetic factors in mice infected with H. heilmannii for 3 and 6 months. METHODS:Immunohistochemical studies have been performed by FITC-dextran intra-aortic infusion or CD31, vascular endothelial growth factor-A, cyclooxygenase 2 antibodies using our recently established model of gastric mucosa-associated lymphoid tissue-type gastric B-cell lymphoma in C57BL/6 mice. RESULTS:Increased microcirculatory network was recognized surrounding the MALT lymphoma tissues by both the FITC-dextran infusion method and CD31 immunoreactivity. Vascular endothelial growth factor-A immunoreactivity was recognized within the lymphoma tissues as well as in the marginal area, while cyclooxygenase-2 immunoreactivity was localized in the area surrounding the MALT lymphoma tissues. CONCLUSION:Increased microvascular network as well as enhanced VEGF-A immunoreactivity was shown to be related to expansion of the MALT lymphoma formed by Helicobacter heilmannii infection.

authors

Nakamura M,Takahashi S,Matsui H,Murayama SY,Aikawa C,Sekiya Y,Nishikawa K,Matsumoto T,Yamada H,Tsuchimoto K

doi

10.1111/j.1440-1746.2008.05554.x

subject

Has Abstract

pub_date

2008-12-01 00:00:00

pages

S157-60

eissn

0815-9319

issn

1440-1746

pii

JGH5554

journal_volume

23 Suppl 2

pub_type

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