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Cell migration is a fundamental biological process involving membrane polarization and cytoskeletal dynamics, both of which are regulated by Rho family GTPases. Among these molecules, Rac is crucial for generating the actin-rich lamellipodial protrusion, a principal part of the driving force for movement. The CDM family proteins, Caenorhabditis elegans… (More)
Organ-specific autoimmune diseases have been postulated to be the result of T cell response against organ-specific self-peptides bound to MHC molecules. Contrary to this paradigm, we report here that transgenic mice lacking MHC class I expression and expressing an MHC class II I-A(b) molecule that presents only a single peptide (E alpha 52-68) spontaneously… (More)
T cell differentiation in the thymus is driven by positive selection through the interaction of alphabeta T cell receptors (TCRs) with self-peptides bound to self-major histocompatibility complex molecules, yet the influence of the peptide sequence on this process remains unknown. To address this issue, we have compared CD4(+) T cell differentiation between… (More)
Intestinal microbiotas of human subjects and effect of antibiotic treatment on them have been reported with cultivation independent methods. However, Japanese fecal microbiotas have not been studied enough. We have constructed a clone library method to obtain results within 3 d. In this study, intestinal microbiotas of 29 healthy Japanese adults, whose… (More)
We report a unique case of acute cholecystitis due to strangulation of a floating gallbladder by the lesser omentum, which could be detected by abdominal ultrasonography. We believe this case to be the first case of reported literatures in English.