Marmiroli Sandra, Bertacchini Jessika, Beretti Francesca, Cenni Vittoria, Guida Marianna, De Pol Anto, Maraldi Nadir M, Lattanzi Giovanna
Department of Anatomy and Histology and CIPro Proteomics Centre, University of Modena and Reggio Emilia, Via Del Pozzo 71, I-41100 Modena, I.G.M.-CNR, Unit of Bologna, c/o IOR, via di Barbiano, Bologna I-40136, Italy.
J Cell Physiol. 2009 Sep;220(3):553-61. doi: 10.1002/jcp.21807.
Lamin A/C is a nuclear lamina constituent mutated in a number of human inherited disorders collectively referred to as laminopathies. The occurrence and significance of lamin A/C interplay with signaling molecules is an old question, suggested by pioneer studies performed in vitro. However, this relevant question has remained substantially unanswered, until data obtained in cellular and organismal models of laminopathies have indicated two main aspects of lamin A function. The first aspect is that lamins establish functional interactions with different protein platforms, the second aspect is that lamin A/C activity and altered function may elicit different effects in different cells and tissue types and even in different districts of the same tissue. Both these observations strongly suggest that signaling mechanisms targeting lamin A/C or its binding partners may regulate such a plastic behavior. A number of very recent data show involvement of kinases, as Akt and Erk, or phosphatases, as PP1 and PP2, in lamin A-linked cellular mechanisms. Moreover, altered activation of signaling in laminopathies and rescue of the pathological phenotype in animal models by inhibitors of signaling pathways, strongly suggest that signaling effectors related to lamin A/C may be implicated in the pathogenesis of laminopathies and may represent targets of therapeutic intervention. In face of such an open perspective of basic and applied research, we review current evidence of lamin A/C interplay with signaling molecules, with particular emphasis on the lamin A-Akt interaction and on the biological significance of their relationship.
核纤层蛋白A/C是一种核纤层成分,在一些统称为核纤层蛋白病的人类遗传性疾病中发生突变。核纤层蛋白A/C与信号分子相互作用的发生及意义是一个由来已久的问题,早期的体外研究就已提出。然而,这个相关问题基本上一直没有得到解答,直到在核纤层蛋白病的细胞和机体模型中获得的数据表明了核纤层蛋白A功能的两个主要方面。第一个方面是核纤层蛋白与不同的蛋白质平台建立功能相互作用,第二个方面是核纤层蛋白A/C的活性和功能改变可能在不同的细胞和组织类型中甚至在同一组织的不同区域引发不同的效应。这两个观察结果都强烈表明,靶向核纤层蛋白A/C或其结合伙伴的信号机制可能调节这种可塑性行为。最近的一些数据显示,激酶(如Akt和Erk)或磷酸酶(如PP1和PP2)参与了与核纤层蛋白A相关的细胞机制。此外,核纤层蛋白病中信号激活的改变以及信号通路抑制剂在动物模型中对病理表型的挽救,强烈表明与核纤层蛋白A/C相关的信号效应器可能与核纤层蛋白病的发病机制有关,并且可能代表治疗干预的靶点。面对基础研究和应用研究的这种开放前景,我们综述了核纤层蛋白A/C与信号分子相互作用的当前证据,特别强调了核纤层蛋白A与Akt的相互作用及其关系的生物学意义。