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Nobuhiro Hiraishi, Yo-ichi Ishida, Masami Nagahama
Nuclear VCP-like 2 (NVL2) is a chaperone-like nucleolar ATPase of the AAA (ATPase associated with diverse cellular activities) family, which exhibits a high level of amino acid sequence similarity with the cytosolic AAA-ATPase VCP/p97. These proteins generally act on macromolecular complexes to stimulate energy-dependent release of their constituents. We previously showed that NVL2 interacts with RNA processing/degradation machinery containing an RNA helicase MTR4/DOB1 and an exonuclease complex, nuclear exosome, and involved in the biogenesis of 60S ribosomal subunits...
November 20, 2015: Biochemical and Biophysical Research Communications
Farid E Ahmed
Early screening for colon cancer (CC) allows for early stage diagnosis of the malignancy and potentially reduces disease mortality as the cancer is most likely curable at its earliest stages. Early detection would be desirable if accurate, practical and cost-effective diagnostic measures for this cancer were available. Mortality and morbidity from CC represent a major health problem involving a malignant disease that is theoretically preventable through screening. Current screening methods (e.g., the convenient and inexpensive immunological fecal occult blood test, FOBTi, obtained from patients' medical records) either lack sensitivity and require dietary restriction, which impedes compliance and use; are costly (e...
April 2014: Expert Review of Anticancer Therapy
Keiichi Tamai, Nobuyuki Tanaka, Takashi Nakano, Eiji Kakazu, Yasuteru Kondo, Jun Inoue, Masaaki Shiina, Koji Fukushima, Tomoaki Hoshino, Kouichi Sano, Yoshiyuki Ueno, Tooru Shimosegawa, Kazuo Sugamura
Exosomes are nanovesicles derived from multivesicular bodies (MVBs) in antigen-presenting cells. The components of the ESCRT (endosomal sorting complex required for transport) pathway are critical for the formation of MVBs, however the relationship between the ESCRT pathway and the secretion of exosomes remains unclear. We here demonstrate that Hrs, an ESCRT-0 protein, is required for fascilitating the secretion of exosomes in dendritic cells (DCs). Ultrastructural analyses showed typical saucer-shaped exosomes in the culture supernatant from both the control and Hrs-depleted DCs...
August 27, 2010: Biochemical and Biophysical Research Communications
K Kurashima, M Numata, A Yachie, Y Sai, N Ishizaka, M Fujimura, T Matsuda, S Ohkuma
The presence of vacuolar H(+)-ATPase (V-ATPase) on exocytotic granules in eosinophils and the role of this enzyme in exocytosis were explored in this study. Antibody against 116-kd subunit of V-ATPase positively stained eosinophil granules in immunofluorescence analysis. When eosinophil lysate was extracted immunomagnetically with the same antibody, the extracted fraction contained a considerable amount of eosinophil peroxidase, a marker of eosinophil-specific granules, which indicates that V-ATPase was present on the membranes of eosinophil exsosomal granules...
November 1996: Laboratory Investigation; a Journal of Technical Methods and Pathology
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