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Biomedical subjects

R Mori

Publications and source records attributed to R Mori.

At least 163 records · Page 9Linked to original sources
PubMed1984

Difference in age distribution of antibody to herpes simplex virus in Fukuoka, Manila and Busan.

Age distribution of antibody to herpes simplex virus (HSV) in Fukuoka, Manila and Busan was investigated by the neutralization test. The results show that a large number of young people lack antibody to HSV in Fukuoka, but not in Manila or Busan. In Manila and Busan, the rates of positive neutralizing antibody to HSV in younger generations are maintained at high levels, showing a significant difference from that of Fukuoka. Such difference is considered to have been derive from the different socioeconomical standards and sanitary conditions.

Adolescent↗
PubMed1984

Effects of antithyroid drugs on Con A-induced suppressor cell activity.

It is well established that Concanavalin A (Con A)-induced human peripheral blood lymphocytes exert suppressive effects on mitogen-induced proliferation of responder cells. Using peripheral blood lymphocytes from healthy individuals, effects of antithyroid drugs on Con A-induced suppressor function were studied. We found an enhancement of Con A-stimulated suppressor activity by MMI and PTU in all these subjects. In the light of these data, an enhancement in suppressor activity by antithyroid drugs may contribute, in part, to a remission of Graves' disease.

Adult↗
PubMed1984

[Prediction of Ovulation and timing of AIH].

The relation among ultrasonographic follicular diameter, serum estradiol (E2), luteinizing hormone (LH), cervical mucus changes, and basal body temperature (BBT) was studied. One hundred and eight cycles were examined in forty-two infertile patients. The last low day of the BBT curve was taken as day zero. In 83 of the 85 cycles, 158 of 163 times, follicles could be observed by ultrasonography. Follicular rupture was confirmed in 12 cycles. The mean diameter of the follicles measured the day before estimated ovulation was 24.00 +/- 3.10mm (mean +/- S.D.). Serum E2 levels were more than 400pg /ml from day -2 to day -1 and the peak serum LH levels occurred on day 0. The volume of cervical mucus (C.M.) was more than 100mm3 from day -2 to day +1. The volume was decreased in clomid stimulated cycles and the C.M. displayed a 3+ ferning 23/28 cycles on day 0. Among 5 pregnancies induced by homologous artificial insemination (AIH), three were done on day -2, one on day +1 and one on day +2. The best time to do AIH is when serum E2 is more than 400pg /ml, serum LH is more than 60m IU/ml, cervical mucus is 3+ ferning , and the follicular diameter is more than 20mm.

Cervix Mucus↗
PubMed1983

Infantile digital fibromatosis. Identification of actin filaments in cytoplasmic inclusions by heavy meromyosin binding.

Cell cultures were carried out from four patients with infantile digital fibromatosis. The cultured cells, which contained cytoplasmic inclusions identical to those of the original tumor cells, possessed cortical bundles of microfilaments, rich network of granular endoplasmic reticulum, and well-developed Golgi complex. To demonstrate the distribution of actin filaments in the cultured cells, the heavy meromyosin-binding method was applied to saponin-treated cells from one of the four patients. The microfilaments constituting the inclusions as well as the cortical bundles were decorated with heavy meromyosin, presenting the "arrowhead complexes" specific for actin filaments. The inclusion may represent abnormal contraction of actin filaments in the cytoplasm of myofibroblasts.

Actins↗
PubMed1983

Protection of newborn mice against herpes simplex virus infection by prenatal and postnatal transmission of antibody.

Pre- and postnatally acquired protection against herpes simplex virus type 2(HSV-2) infection mediated by maternal antibody was investigated in the newborn mouse. Newborn mice, 2 days old, were inoculated with HSV-2 intraperitoneally after maternal immunization with live or inactivated virus. The survival rates improved in proportion to the maternal neutralizing antibody titres. Ninety-three percent of animals delivered by Caesarean section from immune mothers and suckled by non-immune mothers survived viral infection, whereas 7% of control animals survived. The same was true with animals born to non-immune mothers and nursed by immune mothers. In foetal sera and milk of immunized mice, anti-HSV activity was associated primarily with antibody of the IgG class as measured by enzyme-linked immunosorbent assay (ELISA). In addition, oral administration of antibody conferred protection on newborn mice. These studies indicate that maternal IgG, acquired not only postnatally but also prenatally, plays an important role in protecting newborn mice against HSV infection.

Animals↗
PubMed1983

Analysis of peripheral T lymphocyte subpopulations in Graves' disease.

To detect possible changes in the T lymphocyte subpopulations in patients with Graves' disease, T mu and T gamma lymphocytes and "active" T lymphocytes were counted in the peripheral blood lymphocytes. Antithyroid autoantibodies were also measured in correlation with T lymphocyte subset analysis. We found no alteration whatever in T lymphocyte subpopulations, although there was a slight increase in the proportion of "active" T lymphocytes and T gamma lymphocytes in the untreated group, as compared to treated group, but the difference was not statistically significant. There was no correlation between T lymphocyte subpopulations and antithyroid autoantibodies. These data indicate that the defects in T gamma lymphocytes with suppressor function, probably does not explain the etiology of Graves' disease, despite the hypothesis that defects in suppressor cells may lead to the production of thyroid stimulating immunoglobulins and antithyroid autoantibodies in Graves' disease.

Autoantibodies↗
PubMed1983

Effects of antithyroid drugs on lymphocyte proliferative responses to lectins: relationship between insulin autoimmune syndrome and methimazole.

Using peripheral blood lymphocytes from 8 healthy individuals and 5 patients with untreated Graves' disease, direct effects of methimazole (MMI) and propylthiouracil (PTU) on lectin-induced lymphocyte proliferative response were studied. Lymphocytes were cultured for 72 hr in the presence of lectins and antithyroid drugs. Lymphocyte DNA synthesis was counted by incorporation of 3H-thymidine. MMI at 1,000 microM enhanced lectin-induced lymphoproliferation of peripheral blood lymphocytes from both patients with Graves' disease and healthy individuals, at every point of culture time, while PTU showed a tendency toward suppression. These results suggest that this lympho-stimulation by MMI may be a causative factor related to insulin autoimmune syndrome, as deduced from the clinical reports that insulin autoimmune syndrome is, sometimes, found in patients with Graves' disease treated with MMI. This lympho-stimulation was evident regardless of the time of MMI addition, thus indicating that MMI is, by its action, a lymphoid stimulator and may lead to the insulin autoimmune syndrome in predisposed subjects with underlying Graves' disease.

Autoimmune Diseases↗
PubMed1982

Further studies on bacterial lipopolysaccharide-induced protection against experimental allergic encephalomyelitis in guinea pigs. Effects of chemical modifications.

Bacterial lipopolysaccharide (LPS)-induced protection against experimental allergic encephalomyelitis (EAE) was studied in guinea pigs using chemically modified derivatives. Hydroxylaminolysis or alkaline hydrolysis of LPS, by which ester-linked fatty acids are removed from LPS, resulted in total loss of its mitogenic activity for B lymphocytes, and EAE-suppressive activity was simultaneously reduced. Similar diminished activity was observed in delayed-type skin reactions to myelin basic protein (BP) and anti-BP antibody production detected by passive hemagglutination and enzyme-linked immunosorbent assay (ELISA). These results indicate that the active site of LPS in suppressing EAE is in the lipid portion and that there exists a good correlation between the capacity of LPS to suppress EAE and its mitogenic activity.

Animals↗
PubMed1982

Dissemination of herpes simplex virus in nude mice after intracutaneous inoculation and effect of antibody on the course of infection.

Dissemination of herpes simplex virus (HSV) in nude mice after intracutaneous inoculation in the midflank, and the effect of passively administered antibody on the course of infection were investigated. In untreated infected mice the skin lesions developed rapidly and HSV could first be recovered from the homogenate of the dorsal root ganglia on day 3 after infection, from the spinal cord on day 7 and from the brain on day 11. HSV could not be recovered from the blood, spleen or liver. In mice passively immunized with human gamma globulin, development of the skin lesions was rather slow and HSV could not be recovered from the homogenate of the dorsal root ganglia until day 16. From the results of explant culture of the ganglia, HSV was found to have reached the ganglia as early as 48 h after infection, even in mice administered human gamma globulin. The protective action of antibody seems to originate from the inhibition of virus growth not only at the inoculation site but also in the dorsal root ganglia.

Animals↗
PubMed1982

Mechanism of antibody-mediated protection against herpes simplex virus infection in athymic nude mice: requirement of Fc portion of antibody.

Experiments were performed to investigate the resistance of the host due to antibody-mediated mechanisms to herpes simplex virus (HSV) infection. Transfer of hyperimmune anti-HSV mouse serum inhibited the development of skin lesions and prolonged the survival of lethally HSV-infected nude mice. Relatively high concentrations of antibody were required to achieve this protection. Antisera prepared in heterologous animals were also effective, while administration of anti-cowpox virus serum or interferon provided no protection. This type of protection is therefore due to specific antibody and cannot be attributed to interferon. In order to delineate the requirement for antibody in antibody-mediated protection, human gamma globulin preparations were transferred to lethally HSV-infected nude mice. Transfer of intact human gamma globulin (GG) was effective in controlling infection. S-sulfonation of GG did not diminish the protective ability. However, purified F(ab')2 did not have any protective action even when it was administered frequently to maintain serum neutralizing antibody titer. GG was effective in C5-deficient mice lethally infected with HSV. These results indicate that in vivo antibody-mediated protection to HSV infection requires the Fc region of the intact IgG molecule and suggest that antibody-dependent cell-mediated cytotoxicity may be operative in vivo.

Animals↗
PubMed1982

Gossypol as oral contraceptive for male: trial case report.

Gossypol has been used as oral contraceptive for man in People's Republic of China. There are also some reports of studies in which gossypol acetic acid is used in animal experiments. In this study we used tablet preparation of gossypol, which is actually used as oral contraceptive for male in People's Republic of China, on a volunteer. The administration of 20 mg/day gossypol tablets for 19 days resulted in a tendency of decreasing sperm density and total sperm count, but had no effect on serum LH, FSH, PRL or testosterone. Furthermore, the volunteer had no complaints of side effects and his general laboratory findings were normal. Ten days after the termination of gossypol administration, sperm density returned to its preadministrative level. Our study suggests gossypol may be effective as a male oral contraceptive with no acute side effect.

Adult↗
PubMed1981

Biosynthesis of porphyrin precursors in mammals. Identity of alanine: gamma, delta-dioxovalerate aminotransferase with alanine:glyoxylate aminotransferase.

Alanine: gamma, delta-dioxovalerate aminotransferase had been purified from bovine liver mitochondria, and the capacity of this enzyme to form delta-aminolevulinic acid had been suggested to be far greater than that of delta-aminolevulinate synthase (EC 2.3.1.37) from the same mitochondria (Varticovski, L., Kushner, J. P., and Burnham, B. F. (1980) J. Biol. Chem. 255, 3742-3747). In the present study, alanine: gamma, delta-dioxovalerate aminotransferase and alanine-glyoxylate aminotransferase (EC 2.6.1.44) were co-purified to homogeneity from bovine liver mitochondria. The ratio of the two activities remains constant during purification and is unchanged by a variety of treatments of the purified enzyme. Alanine: gamma, delta-dioxovalerate aminotransferase activity is competitively inhibited by glyoxylate. Some kinetic data are presented. These results show that the two activities are associated with the same protein. The enzyme is much higher in the glyoxylate aminotransferase activity than in the dioxovalerate aminotransferase activity. The purified enzyme has a molecular weight of approximately 240,000 with four identical subunits and an isoelectric point of 5.4. The ratio of the gamma, delta-dioxovalerate aminotransferase activity to the glyoxylate aminotransferase was determined with alanine:glyoxylate aminotransferase preparations from various mammalian liver and kidney.

Alanine Transaminase↗