Cellular and Molecular Life Sciences

, Volume 67, Issue 24, pp 4213–4232

ADAMTS-2 functions as anti-angiogenic and anti-tumoral molecule independently of its catalytic activity

Authors

  • J. Dubail
    • Laboratory of Connective Tissues BiologyGIGA-R
  • F. Kesteloot
    • Laboratory of Connective Tissues BiologyGIGA-R
  • C. Deroanne
    • Laboratory of Connective Tissues BiologyGIGA-R
  • P. Motte
    • Laboratory of Plant Cellular Biology
  • V. Lambert
    • Laboratory of Development and Tumor BiologyUniversity of Liège
  • J.-M. Rakic
    • Department of OphthalmologyUniversity Hospital
  • C. Lapière
    • Laboratory of Connective Tissues BiologyGIGA-R
  • B. Nusgens
    • Laboratory of Connective Tissues BiologyGIGA-R
    • Laboratory of Connective Tissues BiologyGIGA-R
Research Article

DOI: 10.1007/s00018-010-0431-6

Cite this article as:
Dubail, J., Kesteloot, F., Deroanne, C. et al. Cell. Mol. Life Sci. (2010) 67: 4213. doi:10.1007/s00018-010-0431-6

Abstract

ADAMTS-2 is a metalloproteinase that plays a key role in the processing of fibrillar procollagen precursors into mature collagen molecules by excising the amino-propeptide. We demonstrate that recombinant ADAMTS-2 is also able to reduce proliferation of endothelial cells, and to induce their retraction and detachment from the substrate resulting in apoptosis. Dephosphorylation of Erk1/2 and MLC largely precedes the ADAMTS-2 induced morphological alterations. In 3-D culture models, ADAMTS-2 strongly reduced branching of capillary-like structures formed by endothelial cells and their long-term maintenance and inhibited vessels formation in embryoid bodies (EB). Growth and vascularization of tumors formed in nude mice by HEK 293-EBNA cells expressing ADAMTS-2 were drastically reduced. A similar anti-tumoral activity was observed when using cells expressing recombinant deleted forms of ADAMTS-2, including catalytically inactive enzyme. Nucleolin, a nuclear protein also found to be associated with the cell membrane, was identified as a potential receptor mediating the antiangiogenic properties of ADAMTS-2.

Keywords

ADAMTSAngiogenesisCell adhesionApoptosisTumor

Abbreviations

EB

Embryoid body

EBM

Endothelial basal medium

ES cell

Embryonic stem cell

HEK 293-EBNA cell

Human embryonic kidney 293-Epstein Barr nuclear antigen cell

HMEC

Human microvascular endothelial cell

HMVEC

Human dermal microvascular endothelial cell

HSF

Human skin fibroblasts

HSMC

Human smooth muscle cell

HSPG:

Heparan sulfate proteoglycan

HUVEC

Human umbilical vein endothelial cell

MLC

Myosin light chain

mTS2

Catalytically inactive ADAMTS-2

PAK

p21 Activated kinase

PECAM

Platelet endothelial cell adhesion molecule: CD31

ROCK

Rho kinase

TSR1

Thrombospondin repeat type 1

TS-2

ADAMTS-2

wtTS2

Wild-type ADAMTS-2

Supplementary material

18_2010_431_MOESM1_ESM.tif (4.1 mb)
Figure S1: ADAMTS-2 alters the morphology of endothelial cells cultured on different substrates. HUVEC or HMEC were seeded on gelatin (k, m, o, q) or fibronectin (l, n, p, r) coats for 3 hours in serum free EBM and cultured for 16 hours in control medium (k, l, o, p) or in the presence of ADAMTS-2 at 5 µg/ml (m, n, q, r). Bar = 100 µm. (TIFF 4209 kb)
18_2010_431_MOESM2_ESM.tif (3.1 mb)
Figure S2: Merge pictures of Fig. 2 a-b and c-d. HUVEC were seeded on fibronectin coat for 3 hours in serum-free EBM and cultured for 16 hours in control medium or in medium supplemented with ADAMTS-2 at 5 µg/ml. Cells were fixed, permeabilized with 0.1% Triton X-100, and stained to visualize actin stress fibers (FITC-Phalloidin; green) and focal adhesions (anti-vinculin mAb and TRITC-conjugated secondary antibody; red). Nuclei were stained with DAPI (blue). Bar = 50 µm. Merge picture (TIFF 3178 kb)
18_2010_431_MOESM3_ESM.tif (414 kb)
Figure S3: Identification of nucleolin as a binding partner for ADAMTS-2. Plasma membrane extracts of HMEC were prepared and applied to a column containing immobilized ADAMTS-2 or the uncoupled resin as control. Bound proteins identified by by micro high performance liquid chromatography-electrospray ionization-trap (µHPLC-ESI-Trap) were eluted at 0.5 M NaCl, separated by SDS-PAGE and analysed by Western blotting using antibody directed against nucleolin. (TIFF 413 kb)
18_2010_431_MOESM4_ESM.tif (955 kb)
Figure S4: Choroidal neovascularisation in wild type and ADAMTS-2 -/- mice. LASER impacts were used to injure, as previously described [46], the choroids of wild type (WT) or homozygous ADAMTS-2 deficient mice (ADAMTS-2-/-) [23] in order to induce an angiogenic response. After 14 days, mice were injected with dextran coupled to fluorescein to visualize blood vessels by fluorescence imaging. Flats mounts of the entire choroids were visualized by confocal microscopy (A). Quantification of the angiogenic response was performed by digital image analysis of the green spots surface (n = 8) (B). Bar = 80 µm. (*: p<0.05) (TIFF 954 kb)
18_2010_431_MOESM5_ESM.doc (42 kb)
Supplementary material 5 (DOC 41 kb)
18_2010_431_MOESM6_ESM.mpg (2.8 mb)
Video 1: Morphology of endothelial cells in control conditions. HUVEC were seeded for 5 hours in EBM supplemented with 0.5% FBS and cultured for 20 hours in control medium. Images were recorded every 5 minutes for 20 hours. Videos were performed with 8 frames/second display rate. (MPG 2898 kb)
18_2010_431_MOESM7_ESM.mpg (2.8 mb)
Video 2: ADAMTS-2 rapidly induces modifications of endothelial cells morphology. HUVEC were seeded for 5 hours in EBM supplemented with 0.5% FBS and cultured for 20 hours in presence of ADAMTS-2 at 5 μg/ml. Images were recorded every 5 minutes for 20 hours. Videos were performed with 8 frames/second display rate. (MPG 2886 kb)

Copyright information

© Springer Basel AG 2010