ADAMTS metalloproteases generate active versican fragments that regulate interdigital web regression.

ADAMTS metalloproteases generate active versican fragments that regulate interdigital web regression.
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DOI:
10.1016/j.devcel.2009.09.008
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发表时间:
2009-11
期刊:
影响因子:
11.8
通讯作者:
Apte, Suneel S.
Apte, Suneel S.
中科院分区:
生物学1区
文献类型:
--
作者:
McCulloch, Daniel R.;Nelson, Courtney M.;Dixon, Laura J.;Silver, Debra L.;Wylie, James D.;Lindner, Volkhard;Sasaki, Takako;Cooley, Marion A.;Argraves, W. Scott;Apte, Suneel S.

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We show that combinatorial mouse alleles for the secreted metalloproteases Adamts5, Adamts20 (bt), and Adamts9 result in fully penetrant soft-tissue syndactyly. Interdigital webs in Adamts5−/−; bt/bt mice had reduced apoptosis and decreased cleavage of the proteoglycan versican; however, the BMP-FGF axis, which regulates interdigital apoptosis was unaffected. BMP4 induced apoptosis, but without concomitant versican proteolysis. Haploinsufficiency of either Vcan or Fbln1, a co-factor for versican processing by ADAMTS5, led to highly penetrant syndactyly in bt mice, suggesting that cleaved versican was essential for web regression. The local application of an amino-terminal versican fragment corresponding to ADAMTS-processed versican, induced cell death in Adamts5−/−; bt/bt webs. Thus, ADAMTS proteases cooperatively maintain versican proteolysis above a required threshold to create a permissive environment for apoptosis. The data highlight the developmental significance of proteolytic action on the ECM, not only as a clearance mechanism, but also as a means to generate bioactive versican fragments.
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