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Biomedical subjects

T Noguchi

Publications and source records attributed to T Noguchi.

At least 775 records · Page 43Linked to original sources
PubMed1988

Gizzerosine raises the intracellular cyclic adenosine-3',5'-monophosphate level in isolated chicken proventriculus.

Gizzerosine, which was originally found in fish meal, is a compound that causes gizzard erosion and ulceration in chicks. The action of gizzerosine on the isolated cells of chicken proventriculus was studied in the present investigations. Gizzerosine increased intracellular cyclic adenosine-3',5'-monophosphate (cAMP) levels, reaching a plateau within 30 min. Similar maxima of cAMP level were observed in the presence of histamine or gizzerosine. However, the potency of gizzerosine was approximately 1,000-fold higher than that of histamine. The action of gizzerosine was depressed by cimetidine, a histamine H2-receptor antagonist, but not by pyrilamine, a histamine H1-receptor antagonist, indicating that gizzerosine is a very strong histamine H2-receptor agonist. The mucosal cells isolated from the proventriculus by the present procedure had both histamine H1 and H2-receptors. Gizzerosine showed a higher affinity to the cell surface histamine receptor than histamine. These results partly explain the potent activity of gizzerosine in inducing gastric acid secretion and causing gizzard erosion and ulceration in chickens.

Animals↗
PubMed1988

Activation of a mcf.2 oncogene by deletion of amino-terminal coding sequences.

The mcf.2 transforming sequence was previously identified by tumorigenicity-assay of the mammary carcinoma cell line MCF-7, molecularly cloned and localized to Xq27 by in situ hybridization. cDNA clones representing both the activated gene and the corresponding portion of its normal counterpart were isolated and their nucleotide sequence determined. Sequence analysis showed that the mcf.2 gene was activated by rearrangement and loss of 5' sequences and no other alteration. Comparison of the mcf.2 nucleotide sequence with the recently published dbl sequence (Eva, A., G. Vecchio, D. Rao, S. Tronick & S. Aaronson (1988) Proc. Natl. Acad. Sci. USA, 85, 2061-2065) revealed that mcf.2 and dbl represent two different activated versions of the same proto-oncogene.

Amino Acid Sequence↗
PubMed1988

Detection of transforming sequences in human melanomas and leukemias.

DNA extracted from fresh solid human melanoma tumors and untreated acute myeloid leukemic cells was used in two assays designed to detect oncogenes, based on the transfection of murine NIH 3T3 fibroblasts followed by selection of transformed cells in low serum concentration or induction of tumors in athymic mice. Ras and non-ras oncogenes were detected.

Animals↗
PubMed1988

[Computer aided design of anticancer drugs].

The recent advances in computer science and technology enabled us to use computer for drug-design. Calculation of structural features of drugs and modeling of biomacromolecules by means of 3D-computer graphics afford a new approach to comprehend a molecular interaction which is important for drug action. As target molecules for anticancer drug, DNA structure can be elucidated and drug-DNA complex model can be constructed to give further insight for drug design. For example, complex of DNA double helix and bleomycin was built and by conjunction with other complex model such as mitomycin C, anthramycin, and netropsin it would be able to design a base sequence specific DNA-groove binding molecule. In addition, DNA is also a target molecule for antibiotics which intercalate between base pairs. Rational design of intercalator and groove binder thus would lead a novel anticancer drug. On the other hand, combination of the fruitful results of molecular biology and gene engineering with computer technology, will give a detail of protein structure which is one of most desired information for designing novel drugs.

Antineoplastic Agents↗
PubMed1988

[Importance of nutritional management for the treatment of carcinoma of the pancreas].

Because the majority of patients with carcinoma of the pancreas are already in a state of malnutrition on admission, various complications can easily occur after surgery and adjuvant therapy such as radiation and chemotherapy. Therefore, the importance of nutritional management in the treatment of pancreatic carcinoma was examined in our department and the following results were obtained: 1) Preoperative nutritional assessment The nutritional state was evaluated using the Prognostic Nutritional Index for Surgery: PNI-S = -0.147 X (ratio of weight loss) + 0.046 X (weight for height) + 0.010 X (% triceps skin fold thickness) + 0.051 X (hepaplastin test), which was calculated from our results. In patients with the PNI-S of over 8, total pancreatectomy was performed safely, and when the PNI-S was more than 6, pancreaticoduodenectomy was done successfully. When the PNI-S was more than 5, it was possible to perform distal pancreatectomy or bypass operation. Depending on the nutritional assessment before surgery, the appropriate operative method could be selected, and the operative results could be improved by preoperative nutritional support. 2) Postoperative nutritional management Administration of a high-calorie by both parenteral and enteral nutrition during the early postoperative period produces good operative results, accompanied by a reduction of postoperative complications, such as fatty liver and so on. This approach also reduces the adverse effects of adjuvant therapy, such as radiation and chemotherapy, with an improvement of prognosis. Thus, it was revealed that nutritional assessment and management was very important for improving the therapeutic results in cases of carcinoma of the pancreas.

Enteral Nutrition↗
PubMed1988

[Sensori-motor neuropathy associated with congenital bilateral club feet: histological and ultrastructural study of the sural nerve].

A 53-year-old female with sensori-motor neuropathy associated with bilateral club feet was reported. She was admitted because of numbness in the bilateral feet and gait disturbance. Her parents were not related. There was no family history of any neurological diseases. She had bilateral club feet which were present at birth to developed in early childhood. She could walk, but could not run. Since 5 years prior to the admission she noted gradually increasing disturbance of gait. Neurological examination revealed muscular weakness and wasting in the distal parts of the lower extremities and decreased deep tendon reflexes. There were hypesthesia, hypalgesia and dysesthesia in the lateral portions of the bilateral feet. Deep sensation was normal. There was no weakness or wasting in the upper extremities. Motor nerve conduction velocities were normal and sensory nerve conduction velocities were reduced in the median nerve. No action potentials could not be elicited in the bilateral tibial and peroneal nerves. A sural nerve biopsy showed a markedly hypertrophic perineurium, 28-150 micron thick, a large Renaut body measured 140 micron by 200 micron in diameters and a markedly reduced number of the myelinated fibers. Fiber size histogram showed many unmyelinated fibers larger than 1 micron, despite loss of fibers of the usual size. Therefore, a part of the unmyelinated fibers might be demyelinated. There were no axonal degeneration and onion-bulb formation. Segmental demyelination was found in approximately 30% of the myelinated fibers.(ABSTRACT TRUNCATED AT 250 WORDS)

Clubfoot↗