Gabison Eric E, Huet Eric, Baudouin Christophe, Menashi Suzanne
CNRS UMR 7149, Université Paris 12, Créteil, France.
Prog Retin Eye Res. 2009 Jan;28(1):19-33. doi: 10.1016/j.preteyeres.2008.11.001. Epub 2008 Nov 17.
In the cornea, the epithelium and the underlying stroma are separated by the basement membrane and Bowman's layer. The disruption of these anatomical barriers during wound healing represents a key step which initiates tissue remodeling through the modification of the epithelial-stromal interactions (ESI). Diffusible cytokines are generally viewed as central modulators in the bidirectional communication between these epithelial and stromal compartments and their implication in all stages of the wound healing process has been an active area of research for many years. Our studies which aimed to explore mechanisms of matrix degradation in pathological corneal wound healing have shown that EMMPRIN, a glycoprotein expressed on corneal epithelial cell surface, can induce matrix metalloproteinase (MMP) production and myofibroblasts differentiation after direct interaction with corneal fibroblasts. EMMPRIN appears therefore as a potential mediator of ESI by direct cell-cell contact which represents a new mechanism for dysregulated MMPs' induction observed in corneal ulcerations. These direct epithelial-stromal interactions (direct-ESI) can occur when delayed epithelial healing prevents regeneration of the basement membrane and allows the two cell types to come into close proximity. We propose that prevention of these interactions through inhibition of EMMPRIN may represent a promising therapeutic strategy in the inhibition of MMP induction in ulceration.
在角膜中,上皮细胞层与下方的基质被基底膜和Bowman层分隔开。伤口愈合过程中这些解剖学屏障的破坏是一个关键步骤,它通过改变上皮-基质相互作用(ESI)启动组织重塑。可扩散的细胞因子通常被视为这些上皮和基质区室之间双向通讯的核心调节因子,并且它们在伤口愈合过程所有阶段的作用多年来一直是一个活跃的研究领域。我们旨在探索病理性角膜伤口愈合中基质降解机制的研究表明,角膜上皮细胞表面表达的一种糖蛋白——细胞外基质金属蛋白酶诱导因子(EMMPRIN),在与角膜成纤维细胞直接相互作用后可诱导基质金属蛋白酶(MMP)产生和成肌纤维细胞分化。因此,EMMPRIN似乎是通过直接细胞间接触成为ESI的潜在介质,这代表了在角膜溃疡中观察到的MMP诱导失调的一种新机制。当延迟的上皮愈合阻止基底膜再生并使两种细胞类型紧密靠近时,就会发生这些直接的上皮-基质相互作用(直接-ESI)。我们提出,通过抑制EMMPRIN来阻止这些相互作用可能是抑制溃疡中MMP诱导的一种有前景的治疗策略。
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