Endothelial Cell Biology in Health and Disease by G. E. Palade (auth.), Nicolae Simionescu, Maya Simionescu

By G. E. Palade (auth.), Nicolae Simionescu, Maya Simionescu (eds.)

Although blood capillaries have been first saw via a flea-lens microscope by means of Malpighi in 1661,200 extra years elapsed ahead of the mobile nature of the vessel wall was once conclusively confirmed. starting with the center of the nineteenth cen­ tury, our wisdom of the histological association of blood vessels has gradually elevated. besides the fact that, the endothelium, which for a very long time was once thought of to be simply an inert barrier lining, have been slightly explored till 3 many years in the past. considering then, there was an upsurge of curiosity within the nice constitution and serve as of endothelial cells. excessive in vivo and in vitro investigations have printed that the endothelial cellphone is a key point in a large choice of standard actions and illnesses. numerous investigators and laboratories were drawn to endothelial mobilephone study, hence aiding the growth of the constantly develop­ ing and diversifying box of endotheliology. The variety of articles released every year in this topic has elevated from a couple of ranking before everything of the Seventies to greater than one thousand lately, and increasingly more journals, books, societies, and symposia concentrated totally on the vascular en­ dothelium have marked the final decade.

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Dingjan, G. , Emeis, T. , Wamaur, S. , and Ruiter, D. , 1985, Monoclonal antibody PAL-E specific for endothelium, Lab. Invest. 52:71. 67. , Carley, W. , and Palade, G. , 1987, Albumin binding proteins of rat microvessel endothelial cells, J. Cell Bioi. 105:326a. 68. , 1984, Interaction of serum proteins with lung endothelial glycocalyx: Its effect on endothelial permeability, Am. J. Physiol. 247:H206. 69. , Abraham, J. , Fiddes, J. , 1987, Capillary endothelial cells express basic fibroblast growth factor that promotes their own growth, Nature 352:257.

1987, Cultured human endothelial cells express platelet-derived growth factor A chain, Am. J. Pathol. 126:7. 20. Curry, F. , Mason, J. , and Michel, C. , 1976, Osmotic reflection coefficients of capillary walls to low molecular weight solutes measured in single perfused capillaries of the frog mesentery, J. Physiol. (London) 261:319. 21. Curry, F. , and Michel, C. , 1980, A fiber matrix model of capillary permeability, Microvasc. Res. 20:96. 22. Danielli, J. , 1940, Capillary permeability and oedema in the perfused frog, J.

93 ,96 The same probe is used for uptake and discharge, but the fluorescent tag on the probe is changed from one step to the other. The results indicate that isolated endothelia are capable of both endocytosis and exocytosis of a variety of proteins from and to the incubation medium. Together the two operations may represent transcytosis, but since the protocol involves a single chamber, the overall nature of the process remains to be established. The system is ingenious and versatile but some of the results obtained are puzzling: albumin, for instance, is not taken up by these endothelial cells but chemically glycosylated albumin is actively endocytosed.

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