Reduced fibulin-2 contributes to loss of basement membrane integrity and skin blistering in mice lacking integrin α3β1 in the epidermis

Reduced fibulin-2 contributes to loss of basement membrane integrity and skin blistering in mice lacking integrin α3β1 in the epidermis
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fibulin-2 减少导致表皮缺乏整合素 α3β1 的小鼠基底膜完整性丧失和皮肤起泡

DOI:
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发表时间:
2014
影响因子:
6.5
通讯作者:
C. DiPersio
C. DiPersio
中科院分区:
医学1区
文献类型:
--
作者:
W. Longmate;Ruby Monichan;M. Chu;T. Tsuda;M. Mahoney;C. DiPersio

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表皮粘附力不足是起泡皮肤病和慢性伤口的标志,这表明整合素是潜在的治疗靶点。整合素 α3β1 是表皮中粘附层粘连蛋白 332 的主要受体,在皮肤发育过程中的基底膜组织中发挥着关键作用。在当前的研究中,我们确定了α3β1通过诱导fibulin-2(一种结合层粘连蛋白-332的基质相关蛋白)促进新生表皮基底膜稳定性的作用。我们证明,表皮中缺乏 α3β1 的小鼠在伤口新表皮下表现出破裂的基底膜,其特征是广泛起泡。这种连接处起泡的表型缺陷在新生α3缺失小鼠以及α3基因突变的人类患者中报告,表明α3β1在基底膜组织中的发育作用在伤口愈合过程中得到重现。缺乏表皮α3β1的小鼠的fibulin-2表达也降低,并且fibulin-2缺失的小鼠表现出与α3β1缺陷小鼠相似的围产期皮肤水疱。有趣的是,α3缺失的伤口表皮或角质形成细胞也显示出层粘连蛋白-332γ2链的加工受损,尽管这种缺陷与减少的fibulin-2无关并且似乎不会引起水泡。我们的研究结果表明,在新生儿皮肤和成人伤口中,整合素 α3β1 通过 fibulin-2 诱导在基底膜稳定性中发挥作用。
Deficient epidermal adhesion is a hallmark of blistering skin disorders and chronic wounds, implicating integrins as potential therapeutic targets. Integrin α3β1, a major receptor in epidermis for adhesion to laminin-332, plays critical roles in basement membrane organization during skin development. In the current study, we identify a role for α3β1 in promoting stability of nascent epidermal basement membranes through induction of fibulin-2, a matrix-associated protein that binds laminin-332. We demonstrate that mice lacking α3β1 in epidermis display ruptured basement membrane beneath neo-epidermis of wounds, characterized by extensive blistering. This junctional blistering phenocopies defects reported in newborn α3-null mice, as well as in human patients with α3 gene mutations, indicating that the developmental role of α3β1 in basement membrane organization is recapitulated during wound healing. Mice lacking epidermal α3β1 also have reduced fibulin-2 expression, and fibulin-2-null mice display perinatal skin blisters similar to those in α3β1-deficient mice. Interestingly, α3-null wound epidermis or keratinocytes also show impaired processing of the laminin-332 γ2 chain, although this defect was independent of reduced fibulin-2 and did not appear to cause blistering. Our findings indicate a role for integrin α3β1 in basement membrane stability through fibulin-2 induction, both in neonatal skin and adult wounds.
Alpha 3 beta 1 整合素在肾脏和肺器官发生中起着至关重要的作用。
DOI: 10.1242/dev.122.11.3537
发表时间: 1996
期刊: Development (Cambridge, England)
影响因子: --
作者:
Kreidberg,JA;Donovan,MJ;Goldstein,SL;Rennke,H;Shepherd,K;Jones,RC;Jaenisch,R
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α 3A β 1 整合素定位于焦点接触以响应不同的细胞外基质蛋白。
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发表时间: 1995
影响因子: 4
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DOI: 10.1093/hmg/4.5.959
发表时间: 1995-05-01
影响因子: 3.5
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DOI: --
发表时间: 1999-08
影响因子: 4
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层粘连蛋白 5 的 α3β1 和 α6β4 整合素受体对于皮肤发育过程中的表皮形态发生和稳态不是必需的。
DOI: 10.1242/jcs.113.17.3051
发表时间: 2000
影响因子: 4
作者:
DiPersio,CM;vanderNeut,R;Georges-Labouesse,E;Kreidberg,JA;Sonnenberg,A;Hynes,RO
通讯作者: Hynes,RO