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Biomedical subjects

T Otsuka

Publications and source records attributed to T Otsuka.

At least 343 records · Page 19Linked to original sources
PubMed1988

[Clinicopathological studies of diffuse axonal injury--five autopsy cases].

In severe head injuries, delayed intracerebral hematoma appearing lately is noted due to the spread use of serial CT scan. The authors experienced the autopsy of 5 cases who presented diffuse axonal injury (DAI) among these new lesions in repeated CT scan findings and report the pathohistological findings. Subjects were as follows: The age range of the patients was 15 to 25 years. The consciousness levels of the 5 cases on admission were 6 or less by the Glasgow coma scale. CT findings of DAI were revealed hemorrhage of the corpus callosum, basal ganglia, tegmentum of pons, intraventricular, and acute brain swelling. Total clinical courses were 2 to 29 days, but most of them were 9 or less days. In the macroscopic findings, marked congestion and edema revealed mainly in deep part of the white matter of the frontal lobe in all 5 cases. Callosal disruption and hematoma adjacent the corpus callosum revealed in 4 out of 5 cases. Cerebral contusion with hemorrhage revealed in 3 out of 5 cases. Intraventricular hemorrhage and traumatic subarachnoid hemorrhage revealed in 2 out of 5 cases. Hemorrhage of basal ganglia and base of pons revealed in 2 cases. Microscopic examination of all 5 cases revealed pallor of myelin in the corpus callosum and white matter surrounding hemorrhagic lesion, and abnormal tortuous, swelling and fragmentation of axons in stained preparation. Axonal retraction ball was recognized in 3 out of 5 cases. In conclusion, five autopsied cases who presented acute brain swelling and hemorrhage of corpus callosum and tegmentum of pons in serial CT scan were examined.(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗
PubMed1987

Effect of human recombinant granulocyte/macrophage colony-stimulating factor and native granulocyte colony-stimulating factor on clonogenic leukemic blast cells.

The effects of human recombinant granulocyte/macrophage colony-stimulating factor (GM-CSF) and human native purified granulocyte colony-stimulating factor (G-CSF) on the growth of clonogenic leukemic blast cells from eight Japanese patients with acute myeloblastic leukemia were studied, using an in vitro leukemic blast colony assay. The results showed that GM-CSF stimulated leukemic blast colony formation in all cases examined, whereas G-CSF stimulated colony formation in four of the eight cases. The maximum stimulating activity of GM-CSF on the growth of clonogenic leukemic blast cells was higher than that of G-CSF in the majority of cases, while sometimes GM-CSF and G-CSF worked synergistically. Thus, the clonogenic leukemic blast cell populations seemed to be heterogeneous with respect to their in vitro response to growth regulators.

Colony-Stimulating Factors↗
PubMed1987

Structural analysis of the mouse chromosomal gene encoding interleukin 4 which expresses B cell, T cell and mast cell stimulating activities.

Based on homology with the mouse interleukin 4 (IL-4) cDNA that expresses B cell, T cell, and mast cell stimulating activities (Lee, F. et al., (1986) Proc. Natl. Acad. Sci. USA 83, 2061), we have isolated from a Balb/c mouse liver DNA library the mouse chromosomal gene and analyzed its overall structure. The gene occurs as a single copy in the haploid genome and contains four exons and three introns. The exon sequences almost completely match the cloned cDNA sequence. Interestingly, there is a fairly high degree of homology between mouse IL-4 and mouse IL-2 genes extending more than 200 bp upstream of a "TATA" like sequence located 20 bp upstream of the transcription initiation site. These sequences may play an important role in the regulated expression of this gene in concanavalin A or antigen-stimulated T lymphocytes. The supernatant of COS7 cells transfected with plasmid DNA containing the entire gene exhibited both T cell growth factor and mast cell growth factor activities.

Amino Acid Sequence↗
PubMed1987

Intracranial pressure in head-injured patients with various intracranial lesions is identical throughout the supratentorial intracranial compartment.

Subarachnoid pressure was measured by bifrontal catheterization to obtain concurrent comparative intracranial pressures (ICPs). These ICPs were compared in 15 head-injured patients who had differences in the pathological processes affecting the right and left hemispheres. ICPs in these patients ranged from -3 to 130 mm Hg, but no difference was found in the concurrent comparative ICPs. These findings suggest that the supratentorial space can generally be considered as one compartment regardless of the differences in types of intracranial lesions.

Adolescent↗
PubMed1987

Aplastic anemia associated with type A viral hepatitis--possible role of T-lymphocytes.

Posthepatitic aplastic anemia (PHAA) is rather uncommon. Most reported cases have developed after non-A, non-B or B type hepatitis. The only case of PHAA occurring after hepatitis A reported so far, was described by Smith et al., who diagnosed it by the long-term elevation of IgG-class antibody in response to hepatitis A virus. Recently, the detection of IgM-class antibody specific against hepatitis A virus (IgM anti-HAV) has been commonly employed for precise diagnosis of hepatitis A. The case reported here is the first case of PHAA occurring after hepatitis A to be diagnosed by radioimmunoassay of IgM anti-HAV. Furthermore, evidence is presented suggesting that the PHAA may have been an immune-related response. Addition of the patient's peripheral T-lymphocytes to cultures of her own bone marrow cells resulted in a reduction in the number of colony-forming units in culture (CFU-C).

Adult↗
PubMed1987

Human bladder carcinoma cell line HTB9, which secretes a factor to stimulate clonogenic leukemic blast growth, expresses the granulocyte-macrophage colony-stimulating factor gene.

Media conditioned by the human bladder carcinoma cell line HTB9 contained high leukemic blast growth factor activity and also showed granulocyte-macrophage colony-stimulating factor (GM-CSF) activity. Northern blotting analysis of total RNA from HTB9 cells using GM-CSF cDNA as a probe demonstrated abundant expression of the GM-CSF gene. Thus, this cell line secretes GM-CSF, and this factor contributes to the proliferation of clonogenic leukemic blast cells.

Carcinoma↗
PubMed1987

Stimulatory effect of forphenicinol on normal human bone marrow granulocyte-macrophage progenitor cells mediated by T-lymphocytes.

Forphenicinol, L-2-(4-formyl-3-hydroxymethylphenyl) glycine, is a newly discovered low molecular weight immunomodifier. Its effects on normal human bone marrow granulocyte-macrophage progenitor cells (CFU-C) were studied in vitro. Addition of forphenicinol to cell cultures resulted in a significant (p less than 0.05) increase in the number of, and preservation of the ability to form CFU-C colonies per fixed number of human non-adherent bone marrow cells. This effect was not observed in T-lymphocyte depleted fractions of human non-adherent bone marrow cells. Furthermore, colony stimulating factor was released when T-lymphocytes were incubated with forphenicinol. These data suggested that T-lymphocytes mediated the stimulatory effect of forphenicol on human bone marrow CFU-C.

Adjuvants, Immunologic↗
PubMed1987

[Therapeutic goals for fluid management in profound shock].

The therapeutic goals for fluid replacement in 9 patients were studied. Five cases in sepsis, 2 in necrotizing pancreatitis and 2 in fat embolism were treated as dehydration or hypovolemia. Fluid replacement was performed with the view of obtaining the amelioration of circulation and urine output, even if CVP or PCWP had been elevated on admission. The values of CVP and PCWP, renal function and pulmonary function were assessed retrospectively. Out of 9 patients, one died of refractory shock, brain edema due to fat embolism and remaining one after recovery of shock. Out of 6 survivors, 2 showed oliguric renal failure, and 2 nonoliguric renal failure. The volume of administered fluid ranged from 5445 ml/10 hrs to 15820 ml/14 hrs and speeds of fluid administration were 545 ml/hr to 1248 ml/hr. CVP value on admission ranged from 4.0 to 22.0 cmH2O (3.0 to 16.3 mmHg), mean value 14.0 +/- 6.5 cmH2O. Through the course, the highest CVP and PCWP ranged from 12.5 to 26.5 (mean 19.8) mmHg and 14 to 36 (mean 20.9) mmHg, respectively. Out of 9 patients, 8 were suffering from respiratory distress, however, 7 recovered by PEEP except for one refractory shock. High values of CVP or PCWP could be recognized even if in hypovolemic shock and/or septic shock. Maintenance of higher values (18-20 mmHg) in CVP and/or PCWP during fluid resuscitation might be recommended because adequate fluid resuscitation could sustain the renal function, and result in good outcome.

Adolescent↗