Regulation of Drosophila matrix metalloprotease Mmp2 is essential for wing imaginal disc:trachea association and air sac tubulogenesis.

Regulation of Drosophila matrix metalloprotease Mmp2 is essential for wing imaginal disc:trachea association and air sac tubulogenesis.
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DOI:
10.1016/j.ydbio.2009.09.005
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发表时间:
2009-11-15
影响因子:
2.7
通讯作者:
Kornberg, Thomas B.
Kornberg, Thomas B.
中科院分区:
生物学3区
文献类型:
--
作者:
Guha, Arjun;Lin, Li;Kornberg, Thomas B.

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果蝇背侧气囊原基(ASP)是一种在翅膀成像盘中向无分支的成纤维细胞生长的气管原基。我们发现,天冬氨酸三叉神经节起源于一支气管分支,该分支侵入椎间盘的基底板,直接与椎间盘细胞并列。我们研究了基质金属蛋白酶(MMPs)的作用,发现MMP2活性降低扰乱了盘-气管联合,改变了IV型胶原和Perlecan在气管周围的分布,失调了ASP的生长,并破坏了背侧气囊的发育。尽管MMP2在ASP中的功能是非细胞自主的,但我们发现它在ASP和Disk中可能具有不同的组织特异性作用。这些发现证明了MMP2在诱导后小管形成中的关键作用,并暗示MMP2调节细胞外基质的动态和本质变化。
The Drosophila dorsal Air Sac Primordium (ASP) is a tracheal tube that grows toward Branchless FGF-expressing cells in the wing imaginal disc. We show that the ASP arises from a tracheal branch that invades the basal lamina of the disc to juxtapose directly with disc cells. We examined the role of matrix metalloproteases (Mmps), and found that reducing Mmp2 activity perturbed disc-trachea association, altered peritracheal distributions of Collagen IV and Perlecan, misregulated ASP growth, and abrogated development of the dorsal air sacs. Whereas the function of the membrane-tethered Mmp2 in the ASP is non-cell autonomous we find that it may have distinct tissue-specific roles in the ASP and disc. These findings demonstrate a critical role for Mmp2 in tubulogenesis post-induction, and implicate Mmp2 in regulating dynamic and essential changes to the extracellular matrix.
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