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Biomedical subjects

T Matsubayashi

Publications and source records attributed to T Matsubayashi.

At least 55 records · Page 3Linked to original sources
PubMed1987

Six chloroplast genes (ndhA-F) homologous to human mitochondrial genes encoding components of the respiratory chain NADH dehydrogenase are actively expressed: determination of the splice sites in ndhA and ndhB pre-mRNAs.

Sequences (ndhA-F) homologous to human mitochondrial genes for components of the respiratory chain NADH dehydrogenase have been found in the chloroplast DNA of tobacco. The ndhA, D, E and F sequences corresponding to the mitochondrial URF1, 4, 4L and 5 are located in the small single copy region, the ndhB sequence corresponding to URF2 in the inverted repeat and the ndhC sequence corresponding to URF3 in the large single copy region of the chloroplast DNA. Northern blot hybridization revealed that all six ndh sequences are actively expressed in the chloroplasts. The ndhA and ndhB sequences contain single introns and the splice sites of their pre-mRNAs were determined by reverse transcription analysis. These findings suggest that potential components of an NADH dehydrogenase are synthesized in the chloroplasts.

Amino Acid Sequence↗
PubMed1987

The gene for the 9 kd polypeptide, a possible apoprotein for the iron-sulfur centers A and B of the photosystem I complex, in tobacco chloroplast DNA.

The gene for the 9 kd polypeptide (a possible apoprotein for the iron-sulfur centers A and B) of photosystem I has been located in the small single-copy region of tobacco chloroplast DNA. This gene (psaC) was identified by comparing the N-terminal amino acid sequence of the spinach 9 kd polypeptide with the entire sequence of tobacco chloroplast genome. The gene organization is ndhE (101 codons)--263 bp spacer--psaC (81 codons)--94 bp spacer--ndhD (509 codons). Northern blot hybridization revealed that psaC is transcribed in the chloroplasts. The deduced amino acid sequence and secondary structure are presented. The predicted polypeptide is rich in cysteine residues and contains a unique repeated sequence.

Amino Acid Sequence↗
PubMed1986

The complete nucleotide sequence of the tobacco chloroplast genome: its gene organization and expression.

The complete nucleotide sequence (155 844 bp) of tobacco (Nicotiana tabacum var. Bright Yellow 4) chloroplast DNA has been determined. It contains two copies of an identical 25 339 bp inverted repeat, which are separated by a 86 684 bp and a 18 482 bp single-copy region. The genes for 4 different rRNAs, 30 different tRNAs, 39 different proteins and 11 other predicted protein coding genes have been located. Among them, 15 genes contain introns. Blot hybridization revealed that all rRNA and tRNA genes and 27 protein genes so far analysed are transcribed in the chloroplast and that primary transcripts of the split genes hitherto examined are spliced. Five sequences coding for proteins homologous to components of the respiratory-chain NADH dehydrogenase from human mitochondria have been found. The 30 tRNAs predicted from their genes are sufficient to read all codons if the ;two out of three' and ;U:N wobble' mechanisms operate in the chloroplast. Two sequences which autonomously replicate in yeast have also been mapped. The sequence and expression analyses indicate both prokaryotic and eukaryotic features of the chloroplast genes.

Journal Article↗
PubMed1986

Serum haloperidol levels of schizophrenics receiving treatment for tuberculosis.

Serum haloperidol levels were studied in schizophrenic patients with and without antituberculosis therapy, and the effect of these agents on serum haloperidol level was evaluated. Rifampicin caused significant suppression of serum haloperidol levels in all cases studied (n = 7). The serum haloperidol clearance rate was accelerated in patients taking rifampicin, with a shortened half-life (4.9 h) compared with the control group (9.4 h). Among 18 schizophrenic patients receiving isoniazid, three showed significantly elevated serum haloperidol levels. It is possible that isoniazid can elevate haloperidol levels in some patients depending upon some unknown factors. The elevation of serum haloperidol level was though to be due to prolonged clearance of haloperidol secondary to isoniazid interaction with hepatic enzymes involved in drug metabolism. These observations suggest that haloperidol doses in schizophrenic patients receiving rifampicin or isoniazid must be carefully monitored.

Adult↗
PubMed1985

A case of hypophyseal prolactinoma with treatable delusions of dermatozoiasis.

The case of an autopsied patient with hypophyseal prolactinoma and dermatozoic delusions is reported, and the mechanism of onset of this special form of delusion is discussed from the neuroendocrinological view point, including response to medications, and neuropathological and pituitary hormonal studies. The subject (69-year-old female) with dermatozoic delusions suffered hypophyseal prolactinoma with high serum prolactin level. Major tranquilizers, minor tranquilizers, or drugs enhancing cerebral blood flow and/or cerebral metabolism did not expell the delusion. Bromocriptine (dopamine agonist) was administered for prolactinoma treatment. After bromocriptine treatment, small doses of haloperidol successfully expelled the delusion. The neuropathological study indicates that the genesis of this delusion is not based on any organic change, but is induced by functional changes related to the prolactin and dopamine systems.

Aged↗
PubMed1983

The response of neoplastic intestinal vessels to prostaglandin F2 alpha: angiographic observations with emphasis on therapeutic applications.

The effects of prostaglandin (PG) F2 alpha in 16 patients with vascular malignant intestinal tumors were analyzed by angiography. It was found that PGF2 alpha reduced tumor vascular flow selectively in all but one patient, a rectal carcinoma case. Among the remaining group, a case of intestinal choriocarcinoma complicated by massive gastrointestinal hemorrhage was successfully controlled with intraarterial infusion of PGF2 alpha into the superior mesenteric artery. Owing to the reduced blood flow in tumors, PGF2 alpha is expected to be used extensively as a vasoconstrictor to control bleeding from tumors of the alimentary tract.

Adult↗
PubMed1981

Arthrographic study of the rheumatoid knee. Part 2. Articular cartilage and menisci.

The changes of the articular cartilage and of the menisci in 129 knee joints with classical rheumatoid arthritis have been investigated by an improved arthrographic technique. The changes of the intra-articular components on the arthrograms coincided well with direct views at arthroscopy and surgery. The changes of the articular cartilage on the arthrograms were graded as normal, deposit and pooling, thinning, filling defect, destruction, and disappearance, and those of the menisci as normal, degeneration, tear, and disappearance. The results showed that: (1) The radiographs did not always reflect the changes of those intra-articular components in the early stages; especially in stage 2 they showed various conditions from intact to destruction. (2) The changes of the menisci were less advanced than those of the articular cartilage in the early stages. (3) The changes in those components progressed almost symmetrically in both compartments. It is necessary to appreciate not only the pathological condition of the bones of the knee joints but also that of the intra-articular components to devise more careful programmes of treatment for rheumatoid knees.

Adult↗
PubMed1980

Case report 118.

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Adult↗