NDLI: Trehalose 6,6′-Dimycolate (Cord Factor) Enhances Neovascularization through Vascular Endothelial Growth Factor Production by Neutrophils and Macrophages

Content Provider	PubMed Central
Author	Sakaguchi, Ikuyo Ikeda, Norikazu Nakayama, Miki Kato, Yoshiko Yano, Ikuya Kaneda, Kenji
Editor	Moore, R. N.
Copyright Year	2000
Abstract	Trehalose 6,6′-dimycolate (TDM) plays important roles in the development of granulomatous inflammation during infection with Mycobacterium spp., Rhodococcus spp., etc. To reveal the augmenting effect of TDM on vascular endothelial growth factor (VEGF) production and neovascularization, we investigated murine granulomatous tissue air pouches induced by Rhodococcus sp. strain 4306 TDM dissolved in Freund's incomplete adjuvant (FIA), comparing them to pouches treated with FIA alone. Histologically, granulomatous tissue and new vessel formation, which reached a maximum at day 7, was greatly enhanced by treatment with TDM. At day 1, VEGF-positive neutrophils accumulated in the pouch wall with frequency of 95% of total infiltrating cells, adhering to TDM-containing micelles. By day 3, granulomatous tissue and new vessels started to develop, and VEGF-positive macrophages appeared in a small number and gradually increased in number thereafter. The pouch contents of VEGF, interleukin-1β, tumor necrosis factor alpha, and transforming growth factor β were significantly elevated in TDM-treated pouches, with peaks at days 1, 0.5, 1, and 3, respectively, compared to those of control pouches, while that of basic fibroblast growth factor showed no significant increase. Treatment with anti-VEGF antibody inhibited TDM-induced granulomatous tissue formation and neovascularization, and administration of recombinant VEGF into pouches treated with FIA alone induced neovascularization comparable to that in the TDM-treated pouches. Incubation of neutrophils and macrophages on TDM-coated plastic dishes increased the VEGF release. The present results indicate that TDM augments VEGF production by neutrophils and macrophages and induces neovascularization in the granulomatous tissue.
Starting Page	2043
File Format	PDF
ISSN	10985522
e-ISSN	10985522
Journal	Infection and Immunity
Issue Number	4
Volume Number	68
Language	English
Publisher	American Society for Microbiology
Publisher Date	2000-04-01
Access Restriction	Open
Rights Holder	American Society for Microbiology
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Infectious Diseases Parasitology Immunology Microbiology

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Trehalose 6,6′-Dimycolate (Cord Factor) Enhances Neovascularization through Vascular Endothelial Growth Factor Production by Neutrophils and Macrophages

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