Talin-dependent integrin activation is required for endothelial proliferation and postnatal angiogenesis.
Talin-dependent integrin activation is required for endothelial proliferation and postnatal angiogenesis.
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DOI:
10.1007/s10456-020-09756-4
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发表时间:
2021-03
期刊:
影响因子:
9.8
通讯作者:
Petrich BG
中科院分区:
文献类型:
--
作者:
Pulous FE;Carnevale JC;Al-Yafeai Z;Pearson BH;Hamilton JAG;Henry CJ;Orr AW;Petrich BG
Integrin activation contributes to key blood cell functions including adhesion, proliferation and migration. An essential step in the cell signaling pathway that activates integrin requires the binding of talin to the β-integrin cytoplasmic tail. Whereas this pathway is understood in platelets in detail, considerably less is known regarding how integrin-mediated adhesion in endothelium contributes to postnatal angiogenesis. We utilized an inducible EC-specific talin1 knock-out mouse (Tln1 EC-KO) and talin1 L325R knock-in mutant (Tln1 L325R) mouse, in which talin selectively lacks the capacity to activate integrins, to assess the role of integrin activation during angiogenesis. Deletion of talin1 during postnatal days 1-3 (P1-P3) caused lethality by P8 with extensive defects in retinal angiogenesis and widespread hemorrhaging. Tln1 EC-KO mice displayed reduced retinal vascular area, impaired EC sprouting and proliferation relative to Tln1 CTRLs. In contrast, induction of talin1 L325R in neonatal mice resulted in modest defects in retinal angiogenesis and mice survived to adulthood. Interestingly, deletion of talin1 or expression of talin1 L325R in ECs increased MAPK/ERK signaling. Strikingly, B16-F0 tumors grown in Tln1 L325R adult mice were 55% smaller and significantly less vascularized than tumors grown in littermate controls. EC talin1 is indispensable for postnatal development angiogenesis. The role of EC integrin activation appears context-dependent as its inhibition is compatible with postnatal development with mild defects in retinal angiogenesis but results in marked defects in tumor growth and angiogenesis. Inhibiting EC pan-integrin activation may be an effective approach to selectively target tumor blood vessel growth
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DOI:
10.1084/jem.20071800
发表时间:
2007-12-24
期刊:
The Journal of experimental medicine
影响因子:
--
作者:
Petrich BG;Marchese P;Ruggeri ZM;Spiess S;Weichert RA;Ye F;Tiedt R;Skoda RC;Monkley SJ;Critchley DR;Ginsberg MH
通讯作者:
Ginsberg MH
影响因子:
20.3
作者:
Haling, Jacob R.;Monkley, Susan J.;Petrich, Brian G.
通讯作者:
Petrich, Brian G.
影响因子:
64.8
作者:
Carmeliet, Peter;Jain, Rakesh K.
通讯作者:
Jain, Rakesh K.
DOI:
10.1084/jem.20071827
发表时间:
2007-12-24
期刊:
The Journal of experimental medicine
影响因子:
--
作者:
Nieswandt B;Moser M;Pleines I;Varga-Szabo D;Monkley S;Critchley D;Fässler R
通讯作者:
Fässler R
影响因子:
15.3
作者:
Mahabeleshwar, Ganapati H.;Feng, Weiyi;Phillips, David R.;Byzova, Tatiana V.
通讯作者:
Byzova, Tatiana V.