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Biomedical subjects

H Kamata

Publications and source records attributed to H Kamata.

At least 73 records · Page 4Linked to original sources
PubMed1991

Nucleotide sequence of cDNA to the rinderpest virus mRNA encoding the nucleocapsid protein.

The full-length cDNA corresponding to the mRNA encoding the nucleocapsid protein (NP) of rinderpest virus (RV) was cloned and its complete nucleotide sequence was determined. The gene of RV-NP was composed of 1683 nucleotides and contained a single large open reading frame, which is capable of encoding a protein of 525 amino acids with a molecular weight of 58,241 Da. The nucleotide sequence and predicted amino acid sequence were compared with those of measles virus (MV) and canine distemper virus (CDV). The nucleotide sequence of the coding region of RV-NP (53-1630) revealed a homology of 68.1% and 63.0% with MV and CDV-NP, respectively. Relatively moderate homologies of 68.7% (MV) and 64.3% (CDV) were found at nucleotides 53-592. The highest homology of 75.3-74.3% was equally present between RV and both MV and CDV in the middle region at nucleotides 593-1312. The homologies of the predicted amino acids in this region were 88.3% (MV) and 86.3% (CDV). Relatively low (MV) or little (CDV) homology was detected in the last 318 nucleotides toward the 3' terminus (1313-1630). The predicted secondary structures of amino acids at the C terminus differed between the three viruses.

Amino Acid Sequence↗
PubMed1990

Long-term mass screening in uterine cervical carcinoma eradication strategy.

Results of the Tochigi Cancer Detection Center screening of a total of 252,453 women for uterine cervical neoplasm, conducted over fifteen years, are reported. Among the women, 16,454 (6.5%) were referred for precision reexamination and 14,129 (85.9%) responded. Eighty-nine patients with unmistakably invasive carcinomas at International Federation of Gynecology and Obstetrics (FIGO) Stage Ib or more, 81 with microinvasive carcinomas at Stage Ia and 192 with carcinomas in situ were found, all of them receiving appropriate treatment. The cervical neoplasm detection rate decreased from 26.2 per 10,000 to 6.9 per 10,000 during the 15 years (average rate, 0.15%) with a relatively increasing trend of early stage carcinoma (microinvasive and in situ carcinomas) (62.9-84.0%) over frank carcinoma (37.1-16.0%). During the same period, the ratio of the uterine carcinoma mortality rate to that of all carcinomas decreased from 5.0 to 2.7%. The mean ages (years) of patients with frankly invasive (53.4), microinvasive (48.2) and in situ (45.6) carcinomas, however, remained constant over the 15 years. Five-year actuarial survival rates were 86.6% for frank, 98.8% for microinvasive and 98.8% for in situ carcinomas. Among rechecked women, all frank carcinoma patients were rescreened after more than one-and-a-half years of their last check. These results suggest that long-term mass screening and yearly checks would be of value both for detecting uterine carcinoma earlier and for reducing its mortality rate.

Adult↗
PubMed1989

Development of heat-stable recombinant rinderpest vaccine.

Recombinant vaccinia virus (RVV) containing the full-length cDNA of rinderpest virus (RV)-haemagglutinin (H) gene was constructed. The H gene was inserted into the attenuated vaccine strain of vaccinia virus (VV), Le 16 m0, with two different promoters, namely cowpox virus A-type inclusion body (ATI) promoter or VV 7.5 kilodalton (P7.5) promoter. These RVVs produced the same sized fully glycosylated RV-H protein in RK 13 cells as that of the authentic RV-H. Their heat stability in the lyophylized state was similar to that of the parental VV. All rabbits immunized with these RVVs produced virus neutralizing (VN) antibody to RV as well as anti RV-H antibody. Four weeks after immunization, these animals were challenged with RV intravenously. None of the RVV-immunized rabbits developed any clinical signs of RV infection except one which was immunized with RVV containing the ATI promoter and developed low VN titer. These results indicate the possibility of developing a heat-stable recombinant vaccine for the eradication of rinderpest in tropical countries without cold storage systems.

Animals↗
PubMed1989

[The correlation of serum IgE and IgE-RAST of mite, egg white, milk, soybean, rice and wheat: a study by analysis of regression curves].

The correlation of variation in serum IgE and IgE-RAST in 364 cases of patients with atopic dermatitis (AD) aged 4 months to 78 years was analysed by comparison with the scatter diagram and fifth dimension regression curve representing the serum IgE and IgE-RAST scores of mite, egg white, milk, soybean, wheat and rice. The antigens indicating a high IgE-RAST score varied according to age. They were egg white and milk in infancy and mite from one to fifteen years of age. Rice and wheat came later. A high value of serum IgE with AD was seen to depend on the production of specific mite IgE antibody and to be influenced by each specific IgE antibody production, which varied according to age. It seemed that egg white and milk were initiators of AD and mite acted as a promotor. Rice and wheat were accelerators in patients with adult type AD. It was confirmed that, for AD patients of all ages, improvement of the environmental antigens and diet therapy was necessary.

Adolescent↗
PubMed1988

[A case of leukoencephalopathy caused by HCFU].

After a hysterectomy, a bilateral salpingo-oophorectomy, two courses of intra-peritoneal chemotherapy of Cisplatinum, Carmofur (HCFU, 600 mg/day [per os]) were given a patient who had ovarian granulosa cell tumor (malignant, stage Iai). Dizziness and loss of consciousness developed about 60 days after administration of HCFU, and leucoencephalopathy was diagnosed. A CT revealed a diffuse low density area in the white matter of the cerebrum. Myelin Basic Protein in the spinal fluid was found to amount to 9.8 mg/dl, which in norm. person is less than 4.0 mg/dl. Also, it showed parallel changes with the course of the clinical findings. HCFU easily dissolves to fat and changes to 5-FU without enzymes in the liver cell. Further HCFU also passes through Blood Brain Barrier to Produce 5-FU and its derivatives, in which the alpha-Fluoro-beta-Alanine is thought to be the culprit that brings on leucoencephalopathy. Even so, HCFU should be dosed when needed in spite of this risk. Other 5-FU modifiers also have been reported to produce the same effect in several cases.

Adult↗
PubMed1987

Genes encoding two lipoproteins in the leuS-dacA region of the Escherichia coli chromosome.

The coding of two rare lipoproteins by two genes, rlpA and rlpB, located in the leuS-dacA region (15 min) on the Escherichia coli chromosome was demonstrated by expression of subcloned genes in a maxicell system. The formation of these two proteins was inhibited by globomycin, which is an inhibitor of the signal peptidase for the known lipoproteins of E. coli. In each case, this inhibition was accompanied by formation of a new protein, which showed a slightly lower mobility on sodium dodecyl sulfate-polyacrylamide gel electrophoresis and which we suppose to be a prolipoprotein with an N-terminal signal peptide sequence similar to those of the bacterial major lipoproteins and lysis proteins of some bacteriocins. The incorporation of 3H-labeled palmitate and glycerol into the two lipoproteins was also observed. Sequencing of DNA showed that the two lipoprotein genes contained sequences that could code for signal peptide sequences of 17 amino acids (rlpA lipoprotein) and 18 amino acids (rlpB lipoprotein). The deduced sequences of the mature peptides consisted of 345 amino acids (Mr 35,614, rlpA lipoprotein) and 175 amino acids (Mr 19,445, rlpB lipoprotein), with an N-terminal cysteine to which thioglyceride and N-fatty acyl residues may be attached. These two lipoproteins may be important in duplication of the cells.

Amino Acid Sequence↗