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C Sakashita

Publications and source records attributed to C Sakashita.

7 recordsLinked to original sources
PubMed2001

Adenovirus is a key pathogen in hemorrhagic cystitis associated with bone marrow transplantation.

Late-onset hemorrhagic cystitis (HC) is a well-known complication of bone marrow transplantation (BMT) that is mainly attributed to infection with BK virus (BKV) and adenovirus (AdV). From 1986 through 1998, 282 patients underwent BMT, and 45 of them developed HC. Urine samples tested positive for AdV in 26 patients, of which 22 showed virus type 11. Among patients who underwent allogeneic BMT, logistic regression analysis revealed acute graft-versus-host disease (grade, > or = 2) to be the most significant predictive factor for HC (P < .0001). In addition, a total of 193 urine samples regularly obtained from 26 consecutive patients who underwent allogeneic BMT were examined for BKV, JC virus (JCV), and AdV by means of polymerase chain reaction. Of patients without HC, approximately 30% of the specimens tested positive for BKV (58 samples) and JCV (55 samples), whereas 5 (3%) tested positive for AdV. Of the 3 samples obtained from patients with HC, the numbers of positive results for BKV, JCV, and AdV were 3, 1, and 1, respectively; the numbers of positive results increased to 14 of 17, 9 of 17, and 10 of 17, respectively, when we added another 14 samples obtained from 14 patients with HC (P < .0001, P = .026, and P < .0001, respectively). In conclusion, there was significant correlation between AdV and HC in the patients we studied.

Adenovirus Infections, Human↗
PubMed2001

Acquired storage-pool disorders occurring late after allogeneic bone marrow transplantation: partial activation of platelets in asymptomatic patients.

Bone marrow transplantation (BMT) may be complicated by coagulation abnormalities. The present study evaluated whether platelets might be activated in patients who had undergone BMT without significant coagulopathy. The patients selected had received allogeneic BMTs a median of 39 months before the study (range, 11-124 months) and had not received cyclosporine, FK506 (tacrolimus), or other medication affecting cyclo-oxygenase for at least 3 months prior to the collection of blood samples. Furthermore, patients had platelet counts greater than 100 x 10(9) cells/L and normal serum creatinine levels. Twenty-five healthy volunteers acted as controls. Platelet aggregation studies and a mepacrine assay of platelets showed abnormal aggregation and decreased staining in some patients. The platelet storage-pool adenosine 5'-triphosphate (ATP) level in 15 patients after BMT was 0.45+/-0.24 micromol per 10(11) platelets, whereas the level in 18 controls was 1.03+/-0.36 micromol per 10(11) platelets (P = .00078). The total ATP levels of platelets in patients and controls were 4.33+/-1.14 and 5.63+/-1.51 micromol per 10(11) platelets, respectively (P = .016). With the exception of 1 patient, plasma levels of thrombomodulin and von Willebrand factor were all within the normal range. The average plasma level of 11-dehydrothromboxane B2 was significantly increased in 15 patients after BMT compared with controls, 20.6+/-8.2 and 10.3+/-1.2 pg/mL, respectively (P = .0004). These findings suggest a long-term process of platelet activation in patients after BMT and, following the cessation of cyclosporine, development of acquired storage-pool disorder of platelets.

Adenosine Triphosphate↗
PubMed2000

[Allogeneic bone marrow transplantation for primary myelofibrosis after splenectomy].

A 46-year-old woman was given a diagnosis of primary myelofibrosis (PMF) in 1996. Because of the progression of anemia and splenomegaly, she was scheduled for allogeneic bone marrow transplantation (BMT) from an HLA-matched sibling donor in April 1998. Cyclophosphamide and busulfan were used as the conditioning regimen. Before BMT, the patient was treated with hydroxycarbamide, which did not resolve splenomegaly. She then underwent a splenectomy, which was followed by massive portal vein thrombosis without any significant clinical outcome. After BMT, the patient obtained rapid hematologic engraftment. Moreover, the alleviation of marrow fibrosis was confirmed 4 months after BMT. We concluded that allogenic BMT can cure patients with PMF, but that the issue of splenectomy and the indications for BMT need to be evaluated further.

Bone Marrow Transplantation↗
PubMed1999

Establishment of a double Philadelphia chromosome-positive acute lymphoblastic leukemia-derived cell line, TMD5: effects of cytokines and differentiation inducers on growth of the cells.

A double Philadelphia chromosome (Ph)-positive leukemia cell line with common-B cell phenotype, designated TMD5, was established from the blast cells of a patient with double Ph-positive acute lymphoblastic leukemia. TMD5 cells expressed 190 kDa BCR/ABL chimeric protein and 145 kDa ABL protein. The cells proliferated without added growth factors. Autocrine growth mechanism was not recognized. The addition of growth factors such as G-CSF, GM-CSF, IL-3, IL-6, or Stem Cell Factor did not affect the growth. Herbimycin A suppressed the growth of TMD5 cells at the low concentration that did not affect Ph-negative cells. It suppressed tyrosine phosphorylation of intracellular proteins in TMD5 cells. Dexamethasone and dibutyryl cyclic AMP also suppressed the growth. They, however, did not affect the phosphorylation significantly. Neither all-trans retinoic acid nor interferon-alpha affected the growth. TMD5 cells, characterized minutely here and rare in that they have double Ph chromosomes, will be a useful tool for the study of Ph-positive leukemia.

Adult↗
PubMed1998

Two M-components in a single cell lineage in a patient with a dual isotype secretory B-cell tumour.

We describe a case of Waldenström's macroglobulinaemia with two M-components (IgM and IgG) with the same lambda light chain. Southern blot analysis of bone marrow cells showed rearrangements of immunoglobulin heavy and lambda light chain genes. Sequencing of the complementarity determining region 3 of the two lambda and mu transcripts showed 100% homology. Immunofluorescence study showed that most cells stained for both IgG and IgM. These findings indicated that a single population of cells was expressing two isotypic variants of IgG and IgM, as the genes responsible for production of both components had the same origin.

Base Sequence↗
PubMed1997

[Plasma cell leukemia with amyloid deposition and osteogenetic change at the site of an extramedullary plasmacytoma].

A 49-year-old man was admitted with swelling in the left lower extremity, and a mass in the left lower abdomen. Laboratory findings showed an increased WBC of 15,000/microliter with 41% plasma cells, and immunoglobulin (Ig) A of 2,557mg/dl with a monoclonal component. A roentgenogram and computed tomograph of the abdomen revealed that a 5 x 10 cm mass with calcification located in the iliopsoas muscle. Plasma cell leukemia with extramedullary plasmacytoma was diagnosed, and the patient was treated with high-dose dexamethasone (40 mg/day for 4 days), resulting in a good response with the disappearance of plasma cells in peripheral blood and a marked decrease in serum Ig A. However, the patient's condition deteriorated in spite of various treatments, and he died of heart failure 5 months after admission. With informed consent from relatives, a necropsy was performed and infiltration of plasma cells in the mass in the iliopsoas muscle was noted. We reported this case because plasma cell leukemia with amyloid deposition and osteogenesis at the site of extramedullary plasmacytoma is very rare.

Amyloid↗