Shinpei Nakazawa

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Bcr-Abl kinase is known to reverse apoptosis of cytokine-dependent cells due to cytokine deprivation, although it has been controversial whether chronic myeloid leukemia (CML) progenitors have the potential to survive under conditions in which there are limited amounts of cytokines. Here we demonstrate that early hematopoietic progenitors (Sca-1(+) c-Kit(+)(More)
Total excision is the treatment of choice in preventing the relapse of craniopharyngioma, but for tumors involving an extensive area, it is often associated with increased risks of complications. The efficacy of postoperative radiotherapy has not yet been established. The authors have performed minimal tumor excision followed by intensive injection of(More)
Using the polymerase chain reaction followed by single-strand conformation polymorphism (PCR-SSCP) analysis and direct nucleotide sequence determination, the p53 gene was analyzed in six fresh leukemia samples from which cell lines with p53 mutations were established. Mutations of the p53 gene which were identical to those in the cell lines were observed in(More)
BACKGROUND AND STUDY AIMS Intraductal ultrasonography (IDUS) is a useful method for the diagnosis of pancreatobiliary diseases, but the images obtained using the presently available ultrasonic probes are limited by their two-dimensional nature and are sometimes difficult to interpret. The possible application of three-dimensional intraductal ultrasonography(More)
The thyrotropin-releasing hormone (TRH) test was performed in 30 patients soon after trauma to evaluate the effects of acute head injury on hypothalamohypophyseal functions. Plasma prolactin (PRL) and thyrotropin (TSH) were measured before and after TRH loading. The basal level of the plasma PRL was elevated in patients with severe head injuries compared to(More)
The peroxisome proliferator-activated receptor gamma (PPAR gamma), a member of the nuclear receptor superfamily, is expressed at highest levels in adipose tissue and functions as a central regulator in the process of adipocyte differentiation. In the present study, we showed that human leukemic cell lines, not only myeloid but also lymphoid, express PPAR(More)
Tumor necrosis factor (TNF)-related apoptosis-inducing ligand (TRAIL) and Fas ligand (FasL) have been implicated in antitumor immunity and therapy. In the present study, we investigated the sensitivity of Philadelphia chromosome (Ph1)-positive leukemia cell lines to TRAIL- or FasL-induced cell death to explore the possible contribution of these molecules to(More)
The unliganded glucocorticoid receptor is a multi-oligomer complex consisting of a ligand-binding protein with which two 90 kDa heat shock proteins (hsp90s) are associated. Upon binding of glucocorticoid to the receptor, the ligand-binding protein, which dissociated from hsp90s, enters the nucleus, binds to a specific site in DNA, and thus transmits(More)
Hypercalcemia is relatively rare but clinically important complication in childhood leukemic patients. To clarify the clinical characteristics, mechanisms of hypercalcemia, response to management for hypercalcemia, incidence of t(17;19) and final outcome of childhood acute lymphoblastic leukemia (ALL) accompanied by hypercalcemia, clinical data of 22 cases(More)