PubMed Health⌕ Search

Biomedical subjects

H Shida

Publications and source records attributed to H Shida.

At least 91 records · Page 5Linked to original sources
PubMed1987

Effect of the recombinant vaccinia viruses that express HTLV-I envelope gene on HTLV-I infection.

The human T-lymphotropic virus type I (HTLV-I) is etiologically linked to adult T-cell leukemia (ATL). To develop a vaccine against ATL, we constructed recombinant vaccinia viruses containing the envelope gene of HTLV-I in the vaccinia virus hemagglutinin (HA) gene, a new site where foreign genes can be inserted. A single inoculation of the recombinant virus induced antibodies to the env proteins of HTLV-I in rabbits and had a protective effect against HTLV-I infection.

Animals↗
PubMed1987

[Colorectal cancer and synchronous adenomatous or malignant polyps--factors influencing its incidence].

A retrospective study was made of 433 patients with colorectal cancer who were operated on between January, 1971 and September, 1986. Two-hundred and forty-eight synchronous polyps (226 adenomas and 22 carcinomas) were found in 128 patients (29.6%). The incidence of polyps varied according to the patient's age, sex, family history of colorectal cancer, and also according to the macroscopic classification, depth of infiltration, and the number of the primary tumors. Of these, macroscopic classification seemed to be the most important factor determined by multivariate analysis. The incidence of synchronous polyps of the protuberant type were the highest (50%), as compared to the ulcerating type (28%) and the infiltrating type (19%) (p less than 0.03).

Adenoma↗
PubMed1986

Nucleotide sequence of the vaccinia virus hemagglutinin gene.

Vaccinia virus hemagglutinin (HA) is expressed at late time of infection cycle, and it is nonessential for virus growth. Location of the HA structural gene was determined by hybrid-arrested and hybrid-selected translation methods at the right terminus of the HindIII A fragment. The position of the HA gene was confirmed by the production of the complete HA protein in the cells transfected with the plasmid containing that region. Examination of this nucleotide sequence revealed the positions of cleavage sites for a number of restriction endonucleases. The deduced amino acid sequence revealed that the HA protein is a member of typical surface membrane glycoproteins. Comparison of the nucleotide sequence upstream of the HA coding region with corresponding region of other late genes suggested the existence of the consensus decanucleotides TTCATTTa/tGT between 34 to 18 bp upstream to the initiation codon followed by a cluster of A or T, a unique feature of the late genes of vaccinia virus. These results in conjunction with the ease of isolating HA- mutants provide a basis for a new site suitable for inserting foreign genes.

Base Sequence↗
PubMed1986

Rare variants of Hodgkin's disease of the thymus: report of two cases and proposal for effective clinical management.

We treated two patients with rare variants of Hodgkin's disease of the thymus. One was a 17-year-old girl with a thymoma-like shadow on the chest X-rays, an increased erythrocyte sedimentation rate and an elevated eosinophil count. Pathologically, a mixed cellularity variant of thymus Hodgkin's disease was evident. The other patient was 22-year-old girl with evidence of mediastinal tumor on the chest X-rays. Pathological examination revealed Hodgkin's disease of the lymphocyte predominance variety. She also had Von der Haeve syndrome. In both cases, Hodgkin's disease was suspected by scintiscanning, using three kinds of radioisotope, 201Thallium-chloride, 67Garium-citrate and 75Selenomethionine. Radical excision of the lesion plus preoperative and postoperative irradiations were carried out. Both are well 6 and 5 years after the treatment, respectively. We propose a new diagnostic procedure and a method of treatment for such patients.

Adolescent↗
PubMed1986

Variants of vaccinia virus hemagglutinin altered in intracellular transport.

Two classes of revertants were isolated from a vaccinia virus mutant whose hemagglutinins (HAs) accumulate on nuclear envelopes and rough endoplasmic reticulums. The HAs of one of the revertants had the same phenotype as the wild type, i.e., rapid and efficient movement to the cell surface. The HAs of the second class had biphasic transport: rapid export to the cell surface as in the wild type and slow movement to the medial cisternae of the Golgi apparatus. Biochemical and nucleotide sequence analyses showed that the HAs of all the mutants examined that have defects in transport from the rough endoplasmic reticulum to the Golgi apparatus have altered cytoplasmic domains and that the HAs of the second class of revertants lack the whole cytoplasmic domain, while the HAs of the first class of revertants have a wild-type cytoplasmic domain.

Animals↗
PubMed1985

Isolation of the non-glycosylated proteins of desmosomes and immunolocalization of a third plaque protein: desmoplakin III.

The cytoplasmic plaque of the spot desmosome or macula adhaerens mediates the attachment of bundles of intermediate filaments to the plasma membrane. We have isolated from a bovine epidermal desmosome preparation a fraction that is highly enriched in the non-glycosylated desmosomal proteins. Plastic-embedded and thin-sectioned high-speed pellets of this fraction reveal closely packed filaments that resemble plaque regions of the low pH whole desmosome preparation from which they are derived. NaDodSO4/polyacrylamide gel electrophoresis reveals four major, non-glycosylated proteins of 240, 210, 81, and 77 kDa. In agreement with a previous study, we find the 240- and 210-kDa proteins (desmoplakins I and II) to be closely related, whereas the 81- and 77-kDa proteins are unique. This is shown both immunologically and by one-dimensional proteolytic peptide mapping. Monospecific, polyclonal rabbit antibodies were prepared against the 81-kDa protein and used, in conjunction with protein A-complexed colloidal gold particles (PAG), to immunolocalize this antigen on ultrathin sections of bovine muzzle epidermis. On antibody-labeled sections, PAG particles were associated principally with the desmosomal cytoplasmic plaque. Sections exposed to preimmune serum showed little or no labeling. We conclude that the 81-kDa protein, like the 240/210-kDa protein family, is one of the major components of the desmosomal plaque. We designate it as "desmoplakin III." The location of the 77-kDa protein remains to be definitively established.

Animals↗
PubMed1985

[Surgical indication and outcome of Crohn's disease with special reference to management of anal lesions].

A total of 31 cases of Crohn's disease; 23 males and 8 females; 8 small bowel, 11 colon, 8 both small and large bowels involvement and 4 unknown, were collected and analysed. Twelve cases were treated medically and 19 were operated with 61% of operative and 37% of reoperative rate. There was no death due to Crohn's disease. IVH was successful as non-surgical treatment. Indications for surgery were stricture, fistula formation and unsuccessful medical treatment. Limited resection of the diseased segment was performed and in 4 cases diseased segment was left behind without significant postoperative symptoms. Quality of life of the surgically and medically treated patients was satisfactory except one who had many operations during 20 years and still suffers from Crohn's disease. In 15 (48.4%) periproctal abscess or fistula was associated. There were 2 types of anal lesions, the one being ordinary type of low intersphincteric abscess or fistula and the other complex or Crohn's disease related high abscess or fistula. The former was successfully treated by laying-open whereas the latter was treated rather conservatively by drainage not to damage external sphincter muscles. Outcome of medical and surgical treatment of Crohn's disease was quite satisfactory and operation should not be hesitated in patients with serious complications. Type of anal lesion is to be identified and proper surgical treatment should be performed in feasible cases.

Anal Canal↗
PubMed1983

Analysis of the hemagglutinin glycoprotein from mutants of vaccinia virus that accumulates on the nuclear envelope.

We isolated mutants whose vaccinia hemagglutinin (HA) accumulates on nuclear envelopes and the rough endoplasmic reticulum. Mutant HA must be blocked at a pre-Golgi step because it has high-mannose-type carbohydrates but no fucose. Neither N- nor O-glycosidically linked carbohydrates are involved in the transport defect of the mutant HA, because tunicamycin, an inhibitor of N-type glycosylation, has no effect, and O-type glycosylation takes place in the Golgi organelle. The unglycosylated form of the mutant HA synthesized in the presence of tunicamycin is 3000 daltons larger than the wild type. This higher molecular weight is related to the transport defect. HAs translated in vitro also show this difference, evidence that it reflects mutation in the HA structural gene. Portions of HAs that project into the cytoplasm seem to account for this weight difference. Thus the cytoplasmic tail of glycoprotein has an important function in transport out of the rough endoplasmic reticulum.

Fucose↗
PubMed1983

Significance of renin-angiotensin system during and after surface-induced simple hypothermia in open-heart surgery.

The present studies were performed to investigate the metabolic role of the lungs in the renin-angiotensin system under hypothermia by measuring plasma renin activity, plasma angiotensin I (A I), plasma angiotensin II (A II), plasma aldosterone and plasma angiotensin converting enzyme activity on 14 patients who underwent open-heart surgery with surface-induced simple hypothermia. In addition, dog experiments were performed, in which changes of renal blood flow and angiotensin metabolism in lungs and kidneys under hypothermia were studied in vivo. The following results were obtained: 1) During and after open-heart surgery with surface-induced simple hypothermia, the homeostasis in the renin-angiotensin system is still maintained. 2) An increase of A II may play an important role in maintaining blood pressure under hypothermia. 3) Under hypothermia, the conversion of A I to A II in the kidneys may contribute to an increase of plasma A II.

Adolescent↗
PubMed1983

Angiotensin II-induced myocardial damage with a special reference to low cardiac output syndrome.

The effects of large doses of angiotensin II on the rabbit kidney and heart and or the ability of perfused canine kidney to inactivate angiotensin II were examined to clarify the role of angiotensin II in the low cardiac output syndrome after open-heart surgery. Intravenous infusion of angiotensin II at a rate of 1.1 to 1.4 microgram/Kg/min for 48 hours caused multifocal myocardial necrosis and renal mononuclear cell infiltration and necrosis. Isolated canine kidney preparations inactivated 76% of angiotensin I and 79% of angiotensin II. The results indicates that the kidney can inactivate angiotensin and that high doses of angiotensin II can produce myocardial and renal lesions. It is suggested that an increased concentration of angiotensin II may result in the low cardiac output syndrome through myocardial damage, and that decreased inactivation of angiotensin II by the kidney accelerates the myocardial damage.

Angiotensin II↗