Severe erythroid hypoplasia controlled by immunosuppressive therapy after autologous bone marrow transplantation in a patient with non-Hodgkin's lymphoma.
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Adult↗
Biomedical subjects
T Soma
Publications and source records attributed to T Soma.
No correlation between locations of bcr breakpoints and clinical states in Ph1-positive CML patients.
The majority of patients with chronic myelogenous leukemia (CML) have a characteristic reciprocal translocation between chromosome 9 and 22, resulting in the Philadelphia (Ph1) chromosome. During this translocation, the c-abl oncogene on chromosome 9 is transferred to the Ph1 chromosome and linked to a breakpoint cluster region (bcr), which is part of a large bcr gene. This phenomenon results in the formation of a bcr-c-abl fusion gene, which is transcribed into an 8.5 kb chimeric mRNA encoding a 210 kd bcr-c-abl fusion protein. The fusion protein has tyrosine kinase activity implicated in the pathogenesis of CML. The breakpoint near the c-abl locus on chromosome 9 can occur within a large area. In contrast, the breakpoints on chromosome 22 cluster within the bcr region of 5.8 kb. A chronic phase lasts for an average of 2 to 3 years; and, subsequently, most patients enter blast crisis. In the present study, we examined 15 Ph1-positive CML patients (eight in chronic phase, one in accelerated phase, and six in blast crises) as to whether the identifiable difference in the locations of the bcr breakpoints exist between CML patients in chronic phase and those in blast crisis. In seven of eight CML patients in chronic phase, in one in accelerated phase, and in four out of six CML patients in blast crisis, the bcr breakpoints clustered in the 3' portion of the bcr. Thus, we could not find out the correlation between the locations of the bcr breakpoints and the clinical stage of the CML patients. This might imply that blastic transformation in Ph1-positive CML was caused by other mechanisms than the transition of the bcr breakpoints.
Blast Crisis↗
Effect of ice nucleation by droplet of immobilized silver iodide on freezing of rabbit and bovine embryos.
Silver iodide was immobilized by applying the insoluble reaction between sodium alginate and calcium chloride. The immobilized silver iodide was immersed into a freezing solution in order to trigger ice nucleation. Temperature change during cooling and postthaw in vitro development of embryos were examined in order to evaluate the effectiveness of the immobilized silver iodide (AgI alginate-gel droplet) on embryo development. Samples containing the AgI alginate-gel droplets released the latent heat of fusion at a higher subzero temperature than samples without the AgI alginate-gel droplets. When the AgI alginate-gel droplet was added to the freezing solution of rabbit and bovine embryos, they were successfully preserved in liquid nitrogen.
Journal Article↗
Class switching from gamma 3 to gamma 2b in a murine pre-B cell line.
Class switching from gamma 3 to gamma 2b production at pre-B cell stage was observed in an Abelson virus-transformed murine immature cell line that is able to perform VH to DJH recombinations followed by class switch recombinations. A series of Southern blotting experiments indicates that the class switching from gamma 3 to gamma 2b was mediated by the deletion mechanism of the intervening CH genes on the expressed chromosome and that the break points in the switch recombinations might be different from each other among six independent switching events from gamma 3 to gamma 2b. This in vitro switching system should provide us with much information on the mechanisms of class switch recombination.
Abelson murine leukemia virus↗
[Natural history of ruptured aneurysm of the thoracic aorta. A case report].
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Aged↗
Selective use of the VHQ52 family in functional VH to DJH rearrangements in a B precursor cell line.
AT11-2, an Abelson virus-transformed cell line has DJH complexes on both chromosomes and is able to form functional variable region genes by the joins of VH genes to the DJH complexes during culture. Therefore we examined which VH gene family was used in functional VH to DJH recombinations in AT11-2. Surprisingly, of 32 independent functional VH to DJH recombinational events in AT11-2, 31 events used the VH segments of the VHQ52 family, and the remaining one used the VH segment of the VH7183 family. Thus, we describe here the first B precursor cell line that almost selectively uses the VHQ52 family in functional VH to DJH rearrangements. The selective use of the VHQ52 family in this B precursor cell line strongly indicates nonrandom use of VH gene families, and the existence of a stage at which the VHQ52 family is preferentially used during the normal development of early pre-B cells and has important implications for understanding the ontogeny of VH repertoire development. Furthermore, this cell line should prove extremely valuable in further studies of this kind.
Animals↗
Start of mu-chain production by the further two-step rearrangements of immunoglobulin heavy chain genes on one chromosome from a DJH/DJH configuration in an Abelson virus-transformed cell line: evidence of secondary DJH complex formation.
A variant was selected from an Abelson virus-transformed cell line with identifiable and distinguishable DJH rearrangements on both chromosomes. Southern blotting experiments suggested that this variant resulted from a secondary DJH complex formation accompanied with the deletion of one of the DJH rearrangements on the same chromosome. Furthermore, this variant started making mu-chains by the further functional join of a VH gene to the secondarily formed DJH complex. Thus, we describe here the first evidence of a secondary DJH complex formation.
Abelson murine leukemia virus↗
Effect of rapid addition and dilution of dimethyl sulfoxide and 37 degrees C equilibration on viability of rabbit morulae thawed rapidly.
The aim of the present study was to examine the effects of various conditions of addition and dilution of dimethyl sulfoxide (Me2SO) and 37 degrees C equilibration, and also the effects of freezing in the solution which was prepared in advance and stored in plastic straws at -20 degrees C on the viability of rabbit morulae thawed rapidly. The embryos were cooled from room temperature to -30 degrees C at 1 degree C/min in the presence of 1.5 M Me2SO using a programmable liquid nitrogen vapor freezing machine with an automatic seeding device, then cooled rapidly, and stored in liquid nitrogen. The frozen straws were thawed rapidly (greater than 1000 degrees C/min). When Me2SO was added in a single step, equilibrated with embryos at 37 degrees C for 15 min and diluted out in a single step, a very high survival was obtained: transferable/recovered, 90%: developed/recovered, 96%. When embryos were pipetted into 1.5 M Me2SO that was prepared in advance, stocked in straws at -20 degrees C, and cooled, the proportions of transferable and developed embryos were equivalent to those of embryos frozen in the solution that was prepared immediately before use.
Animals↗
Differentiation of an Abelson virus-transformed immature B precursor cell line under the expression of tyrosine kinase activity of v-abl oncogene product.
The expression of v-abl oncogene during the in vitro differentiation of an Abelson-virus-transformed immature B precursor cell line from immunoglobulin-null to intracytoplasmic mu-positive cells and further to intracytoplasmic gamma 2b-positive cells was examined. The results showed no significant alteration in the amounts and tyrosine kinase activity of v-abl oncogene product during differentiation, indicating that B cell differentiation processes are independent of v-abl functions.
Abelson murine leukemia virus↗
Magnetic resonance imaging of heterotopic gray matter.
Heterotopic gray matter was detected by means of magnetic resonance imaging in a 3-year-old girl with left hemiparesis and atonic seizures. In the inversion recovery sequence, a large area of decreased signal intensity was noted in the right centrum semiovale and differentiation of the right basal ganglia was not clear. We speculated that the brain malformation in our patient occurred at ten weeks conceptional age.
Basal Ganglia↗
Randomized controlled study of postoperative adjuvant immunochemotherapy with Nocardia rubra cell wall skeleton (N-CWS) and Tegafur for gastric carcinoma.
We performed a randomized controlled study of postoperative adjuvant immunochemotherapy with Nocardia rubra cell wall skeleton (N-CWS) and Tegafur for gastric carcinoma between September 1979 and March 1983. A total of 309 patients were entered into this trial. Of the 309 patients, there were 98 evaluable patients in the chemotherapy group and 115 evaluable patients in the immunochemotherapy group. In both groups, Tegafur was given as chemotherapy at a daily dose of 400 to 800 mg, starting at 24-29 days after gastrectomy. In the immunochemotherapy group, 400 micrograms of N-CWS was injected i.d. within the 2nd postoperative week. It was given weekly during the first month and subsequently monthly for as long as practicable. The patients were surveyed for length of survival in March 1985. The postoperative survival rate was analyzed for all cases, and for patients with various histopathological stages of carcinoma for comparison between the two treatment groups. No statistical difference was detected between the two groups in terms of age, sex, surgical curability, or stage of carcinoma. The overall survival rate for all patients was significantly higher in the immunochemotherapy group than in the chemotherapy group (p less than 0.05). With stage III plus IV disease, 53 patients from the chemotherapy group and 61 patients from the immunochemotherapy group were included for the analysis. As a consequence, a highly significant survival rate was observed in patients with stage III plus IV carcinoma in the immunochemotherapy group (p less than 0.005) as compared to the chemotherapy group. The overall 5-year (1800 days) survival rate after surgical treatment was 60.2% for the chemotherapy group and 73.2% for the immunochemotherapy group. In patients with stage III plus IV disease, the 5-year survival rates of the two treatment groups were 28.8% and 52.4%, respectively. Accordingly, the 50% survival period of patients with stage III plus IV cancer was 1800 days or more in the immunochemotherapy group, whereas it was only 722 days in the chemotherapy group. These results emphasize the effectiveness of N-CWS as an adjuvant immunotherapeutic agent in postoperative gastric cancer patients. The main side effects of N-CWS were skin lesions in the injected sites and fever, but these were temporary and not serious.
Actuarial Analysis↗
Effect of silver iodide as an ice inducer on viability of frozen-thawed rabbit morulae.
A new method was devised for inducing ice crystal formation in extracellular solution using silver iodide. A latent heat occurred immediately before temperature of sample reached -7 degrees C, when a column 70 mm high of 1.5M dimethyl sulfoxide (the freezing solution, FS) was aspirated into a plastic straw followed by 3 mm high of air and 10 mm high of 1% suspension of silver iodide in distilled water (1% AgI). To examine the effect of silver iodide as an inducer of ice crystal formation in extracellular solution on in vitro development of frozen-thawed rabbit morulae, the straws were filled by successive aspiration of the following fractions: 175 mul of FS containing the embryos, 7.5 mul of air, 25 mul of 1% AgI. The straws were cooled to -7 degrees C at 1 degrees C/min, and held at -7 degrees C for 10 min without initiating seeding; they were then cooled again to -30 degrees C at 1 degrees C/min and plunged into liquid nitrogen. After rapid thawing (>1000 degrees C/min), 100 of 109 (92%) embryos that were recovered developed into expanding blastocysts.
Journal Article↗
Rearrangement of immunoglobulin heavy chain genes and T3 expression in the absence of rearrangement of T-cell receptor beta-chain gene in a patient with T-cell malignant lymphoma.
We describe the rearrangement of immunoglobulin genes and T3 expression in the absence of rearrangement of T-cell receptor beta-chain genes in a patient with T-cell malignant lymphoma. He had a mediastinal mass and his lymphoma cells expressed T-cell antigens (OKT3+, OKT9+, and OKT10+). When we examined genomic DNA from the lymphoma cells, we detected the rearrangement of immunoglobulin heavy chain genes with a germ-line configuration of light chain genes and no rearrangement of T-cell receptor beta-chain gene. These results indicated that the rearrangement of immunoglobulin genes could occur in T-cell malignant lymphoma, and that T3 antigen could be expressed prior to the rearrangement of T-cell receptor beta-chain genes under certain circumstances.
Adult↗
[Rupture of the right pulmonary artery aneurysm after shunt operation of tetralogy of Fallot].
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Adolescent↗
Effect of rapid addition and dilution of dimethyl sulfoxide on the viability of frozen-thawed rabbit morulae.
The aim of the present study was to examine effects of altering thawing conditions and procedure of addition and dilution of Me2SO on the viability of frozen-thawed rabbit morulae. Five hundred and sixty two rabbit morulae were cooled from room temperature to -80 degrees C at 1 degree C/min in the presence of 1.5 M dimethyl sulfoxide (Me2SO) using a programmable liquid nitrogen vapor freezing machine with an automatic seeding device, cooled rapidly, and stored in liquid nitrogen. When Me2SO was added in a single step, the frozen embryos were thawed in ambient air at 40 degrees C/min and Me2SO was diluted in a single step, 99 of 107 (93%) embryos cultured for 48 hr and 12 of 32 (38%) embryos transferred to 6 recipients developed to expanding blastocysts and viable fetuses, respectively. When Me2SO was added in a single step and the frozen embryos were thawed at the same rate and transferred directly without removal of Me2SO to culture media or oviducts of 8 recipients, 67 of 75 (89%) embryos cultured and 12 of 40 (30%) embryos transferred developed to expanding blastocysts and viable fetuses, respectively. There were no significant differences between these survival rates and survival rates obtained by conventional method, i.e., frozen embryos were thawed at 4 degrees C/min by interrupted slow method and Me2SO was added and diluted in a stepwise manner.
Animals↗
[Infectious complications and infection prevention in patients with acute leukemia].
Febrile episodes in 147 patients undergoing first remission induction therapy for acute leukemia were analyzed. Febrile episodes occurred 254 times in 136 patients. The cause of fever could not be identified in 54.3% of all episodes. Antibiotic therapy was effective in 81.1% of these episodes with no cause determined. Postmortem examinations proved infections in 65.2% of patients who had fever of unknown origin before death. Sepsis and pneumonia together accounted for 53.4% of documented infections. Sepsis and pneumonia occurred most often when the patients had neutropenia (less than 500/mm3). Increase in neutrophil count and achievement of hematologic remission produced good prognosis of the infections, and the reverse was also true in some patients. Fifty percent of fetal patients died of infection. The incidence of infections, especially pneumonia and infections caused by fungi and Proteus species indicating such infections were exogenous, reduced markedly in laminar air flow rooms.
Acute Disease↗
[Chronic myelomonocytic leukemia (CMMoL) and chronic monocytic leukemia (CMoL)--with special reference to their difference, therapy and blastic crisis].
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Aged↗