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Biomedical subjects

Noriyuki Hayashi

Publications and source records attributed to Noriyuki Hayashi.

6 recordsLinked to original sources
PubMed2005

Synthesis and biological evaluation of benzothiazole derivatives as potent antitumor agents.

Based on 2-methyl-4-nitro-2H-pyrazole-3-carboxylic acid[2-(cyclohexanecarbonylamino)benzothiazol-6-yl]amide (1), which shows selective cytotoxicity against tumorigenic cell lines, 2,6-dichloro-N-[2-(cyclopropanecarbonylamino)benzothiazol-6-yl]benzamide (13b) was designed and synthesized as a biologically stable derivative containing no nitro group. The highly potent derivative 13b exhibited excellent in vivo inhibitory effect on tumor growth.

Animals↗
PubMed2005

[Young woman with repeated late stent thrombosis: a case report].

A 34-year-old woman with hypertension, obesity, and history of smoking presented with unstable angina and severe stenosis of the proximal left anterior descending artery. Percutaneous coronary intervention was performed with stent implantation resulting in adequate expansion. She was treated with aspirin and ticlopidine for 1 month, then only aspirin for 1 month. One year after stenting, she presented with acute myocardial infarction and total occlusion at the stent. Balloon angioplasty was performed. She took ticlopidine and aspirin for 9 months. Two months later, she presented with acute myocardial infarction with reocclusion at the stent. Blood examination showed no manifest collagen disease or thrombophilia. This case of repeated late stent thrombosis occurred in a young woman not treated by brachytherapy.

Adult↗
PubMed2005

[Perioperative multivessel coronary vasospasm as a cause of cardiogenic shock immediately after off-pump coronary artery bypass grafting surgery: a case report].

Perioperative coronary vasospasm has been recognized as a possible cause of myocardial infarction or low output syndrome after open heart operations. A 57-year-old male suffered cardiogenic shock immediately after off-pump coronary artery bypass grafting surgery. Emergent angiography performed under intraaortic balloon pumping and percutaneous cardiopulmonary support revealed severe multivessel coronary vasospasm which was effectively treated with a high dose intracoronary administration of isosorbide dinitrate. Emergent angiography for patients with cardiogenic shock after open heart operation is feasible and effective for the diagnosis and treatment of perioperative coronary vasospasm.

Coronary Angiography↗
PubMed2004

[Tako-tsubo-like transient left ventricular dysfunction with apical thrombus formation: a case report].

A 76-year-old woman with oppressive chest pain was admitted to our hospital. Initial electrocardiography revealed normal sinus rhythm with ST-segment elevation in leads V2-V5. The patient underwent emergent coronary angiography, which demonstrated no significant coronary stenosis. Left ventriculography revealed marked hypokinesis and akinesis of the mid and distal segments of all ventricular walls, with hyperkinesis of the base. Six days after admission, transthoracic echocardiography revealed immobile apical thrombus. The thrombus disappeared without any embolic episode after 2 weeks of anticoagulant therapy with heparin and warfarin. Left ventricular walls returned to normal 3 months after the attack. Tako-tsubo-like cardiomyopathy with apical thrombus has only been reported in three cases. Left ventricular function normalizes within several days or weeks in most cases of tako-tsubo-like transient left ventricular dysfunction. Therefore, if the thrombus remains within the left ventricle, the risk of embolism might be relatively high. Careful management must be required in patients with tako-tsubo-like transient left ventricular dysfunction.

Aged↗
PubMed2002

Sequence-selective visual recognition of nonprotected dipeptides.

[structure: see text] A receptor 1 with phenolphthalein and two crown ethers in the molecule develops brilliant purple color in the presence of dipeptides with a specific amino acid-sequence containing a C-terminal lysine. This type of color development could be extended to the detection of oligopeptides of a specific sequence at the N-terminal such as scyliorhinin I and APP(770)(394-410).

Chemical Phenomena↗