A novel transgenic marker for migrating limb muscle precursors and for vascular smooth muscle cells

A novel transgenic marker for migrating limb muscle precursors and for vascular smooth muscle cells
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用于迁移肢体肌肉前体和血管平滑肌细胞的新型转基因标记

DOI:
10.1002/1097-0177(2000)9999:9999
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发表时间:
2001
影响因子:
2.5
通讯作者:
M. Shani
M. Shani
中科院分区:
生物学3区
文献类型:
--
作者:
Avital Tidhar;Moshe Reichenstein;Dana Cohen;A. Faerman;N. Copeland;D. Gilbert;N. Jenkins;M. Shani

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在转基因小鼠系中发现了LacZ表达的独特模式,这可能是由于整合位点处的调控元件。两个新的基因侧翼的转基因进行了鉴定。在发育的早期阶段,转基因在从体节迁移到肢芽的腹外侧demomyotomal细胞中瞬时表达。在发育后期和成人中,lacZ染色标记整个血管床的血管平滑肌细胞,除了主要弹性动脉和周细胞。在骨骼肌和平滑肌中未检测到表达。在血管树的不同水平、动脉以及静脉中观察到血管平滑肌中的不同表达模式。血管损伤导致平滑肌细胞增殖和迁移的刺激,与转基因下调相关。新生内膜增厚形成后,它被重新激活。因此,这种转基因插入可以用作有用的标记,以鉴定参与血管平滑肌表型调节的新生理学线索或遗传元件。它也可以提供一个实验工具,研究血管和周细胞参与调节微血管稳态。© 2001 Wiley利斯公司
A unique pattern of LacZ expression was found in a transgenic mouse line, likely due to regulatory elements at the site of integration. Two new genes flanking the transgene were identified. At early stages of development, the transgene is transiently expressed in ventro‐lateral demomyotomal cells migrating from the somites into the limb buds. At late developmental stages and in the adult, lacZ staining marks vascular smooth muscle cells throughout the vascular bed, with the exception of the major elastic arteries, and in pericytes. No expression was detected in skeletal and smooth muscles. Different patterns of expression in vascular smooth muscles was observed at distinct levels of the vascular tree, in arteries as well as in veins. Vessel injury, resulting in stimulation of smooth muscle cells proliferation and migration, is associated with transgene down‐regulation. After the formation of neointima thickening, it is reactivated. This transgenic insertion may therefore be used as a useful marker to identify novel physiological cues or genetic elements involved in the regulation of the vascular smooth muscle phenotype(s). It may also provide an experimental tool for studying vasculature and the involvement of pericytes in regulating microvascular homeostasis. © 2001 Wiley‐Liss, Inc.
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