Molecular characterization of mutations in thehprt gene of normal human skin keratinocytes treated withN-ethyl-N-nitrosourea: Influence of O6-alkylguanine alkyltransferase

Author(s):  
Hua Hua Tong ◽  
Jeong Hae Park ◽  
Tonya Brady ◽  
Christopher M. Weghorst ◽  
Steven M. D`Ambrosio
2020 ◽  
Vol 726 ◽  
pp. 138526 ◽  
Author(s):  
Daolei Cui ◽  
Jue Bi ◽  
Zhen-Ning Zhang ◽  
Meng-Ying Li ◽  
Yi-Shu Qin ◽  
...  

1998 ◽  
Vol 46 (2) ◽  
pp. 165-176 ◽  
Author(s):  
Birthe Sauter ◽  
Dagmar Foedinger ◽  
Barbara Sterniczky ◽  
Klaus Wolff ◽  
Klemens Rappersberger

We performed a comparative investigation of the immunomorphological characteristics of lymphatic and blood microvascular endothelial cells in normal human skin, cutaneous lymphangiomas, and hemangiomas, employing a pre-embedding immunogold electron microscopic technique. We stained for cell membrane proteins that are commonly used for light microscopic characterization of blood endothelial cells. With blood microvascular endothelial cells, we observed uniform labeling of the luminal cell membranes with monoclonal antibodies (MAbs) JC70 (CD31), EN-4 (CD31), BMA120, PAL-E, and QBEND-10 (CD34), and strong staining of the vascular basal lamina for Type IV collagen under normal and pathological conditions. In contrast, lymphatic microvascular endothelial cells in normal human skin and in lymphangiomas displayed, in addition to a luminal labeling, pronounced expression of CD31 and CD34 along the abluminal cell membranes. Moreover, CD31 was preferentially detected within intercellular junctions. The expression of CD34 was mostly confined to abluminal endothelial microprocesses and was upregulated in lymphangiomas and hemangiomas. Type IV collagen partially formed the luminal lining of initial lymphatics and occasionally formed bridges over interendothelial gaps. Our findings suggest a function of transmigration protein CD31 in recruitment of dendritic cells into the lymphatic vasculature. CD34 labeling may indicate early endothelial cell sprouting. The distribution of Type IV collagen also supports its role as a signal for migration and tube formation for lymphatic endothelial cells.


Author(s):  
Cécile Chamayou‐Robert ◽  
Carole DiGiorgio ◽  
Olivier Brack ◽  
Olivier Doucet

1998 ◽  
Vol 16 ◽  
pp. S71
Author(s):  
V. Vormwald-Dogan ◽  
R. Figueroa ◽  
H. Lindenmaier ◽  
P. Boukamp

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