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Dynamin II Expression and Morphological Comparison of NIH3T3 and NIH3T3 (ras) Cells  

Lee, Chul-Woo (Department of Oral & Maxillofacial Surgery, College of Dentistry, Chosun University)
Kim, Su-Gwan (Department of Oral & Maxillofacial Surgery, College of Dentistry, Chosun University)
Choi, Jeong-Yun (Department of Oral Histology, College of Dentistry, Chosun University)
Choi, Baik-Dong (Department of Oral Histology, College of Dentistry, Chosun University)
Bae, Chun-Sik (College of Veterinary Medicine, Biotechnology Research Institute, Chonnam National University)
Jeong, Soon-Jeong (Department of Oral Histology, College of Dentistry, Chosun University)
Jeong, Moon-Jin (Department of Oral Histology, College of Dentistry, Chosun University)
Publication Information
Applied Microscopy / v.35, no.3, 2005 , pp. 121-128 More about this Journal
Abstract
It has been known that ras signaling transduction leads to cell proliferation and migration including various adaptor molecules. Dynamin protein has been implicated in the formation of nascent vesicles in both the endocytic and secretory pathways. Dynamin was classified into three isoforms: dynamin I is only expressed in neuronal tissue, dynamin II is expressed ubiquitously in all tissue but that of dynamin III is confined to testis. We have reported in previous study that Grb2, binding to ras, was associated with dynamin II in NIH3T3 cells. Therefore we have tried to identify the relative expression of dynamin II according to overexpressed ras protein in ras oncogene transfected cells (NIH3T3 (ras)). For the detection of differential expression of dynamin II, we have used immunofluorescent staining and western blot methods in NIH3T3 and NIH3T3 (ras) cells. Next we have described the morphological differences between NIH3T3 and NIH3T3 (ras) cells using SEM and TEM. From these experiments dynamin II was highly expressed in NIH3T3 (ras) cells. NIH3T3 cells was transformed to more spindle shape with many cell process by transfection of ras oncogene. Moreover dynamin II was more concentrated in endocytotic membrane of the NIH3T3 (ras) cells compared to that of NIH3T3 cells. The present results suggested that dynamin II may involve the intermediate messenger in Ras signaling transduction pathway.
Keywords
Dynamin II; NIH3T3; NIH3T3 (ras); ras;
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