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Biomedical subjects

Y Takemoto

Publications and source records attributed to Y Takemoto.

At least 253 records · Page 14Linked to original sources
PubMed1983

Chemical structures of angiotensins formed by incubating plasma with the kidney and the corpuscles of Stannius in the chum salmon, Oncorhynchus keta.

The chemical structures of salmon angiotensins produced by incubating tissue extract of the kidney or the corpuscles of Stannius (CS) with homologous plasma are proposed. Two angiotensins, [Asp1, Val5, Asn9] and [Asn1, Val5, Asn9] angiotensin I, were proposed from both kidney and CS incubations by amino acid analysis and the fluorescent peptide-mapping techniques. CS angiotensins were not organ specific, because these two angiotensins were produced by both kidney and CS incubations in a ratio of 1:2 under the same conditions. Whether [Asp1, Val5, Asn9] angiotensin I is a naturally occurring form remains to be clarified; however, [Asn1, Val5, Asn9] angiotensin I may be the major form of angiotensin formed from plasma by salmon kidney and CS.

Amino Acid Sequence↗
PubMed1982

[Correlation between coagulation and fibrinolysis in patient with cerebrovascular accident at acute stage].

Ninety five patients with cerebrovascular accidents were studied on their coagulation and fibrinolysis at acute stage of their onset. From the data collected in the present study, following findings were obtained; 1) Hypercoagulable state, which are responsible for the decreased antithrombin III levels, was observed at acute stage of cerebral infarction. 2) Findings from patients with cerebral hemorrhage were normal antithrombin III levels and slightly decreased alpha 2-plasmin inhibitor. These imply the fact of increased fibrinolytic activities. It is suggested that increased fibrinolysis are secondary reaction of cerebral hemorrhage. 3) Findings from patients with subarachnoid hemorrhage showed hypercoagulable state and increased fibrinolytic activities. It is considered that subarachnoid hemorrhage might have mostly a preparatory condition of disseminated intravascular coagulation among cerebrovascular accidents.

Acute Disease↗
PubMed1978

Toxicological studies on pipemidic acid. V. Effect on diarthrodial joints of experimental animals.

Pipemidic acid (PPA) orally given in a dose of 100 mg/kg/day or more was found to cause lame gait in immature beagle dogs of about 3 months old. Their diarthrodial joints were abnormal with increased synovial fluid and blister formation under the outer layer of the articular cartilage. However, such an abnormality was not found in dogs younger than 2 weeks or older than 12 months. The blisters were formed at the joint areas bearing the body weight at a time when PPA was considered to be present there. Nalidixic and piromidic acids, structural analogues of PPA, also caused abnormality similar to PPA. The severity of the arthropathy was slight with piromidic acid as compared with PPA and nalidixic acid. The gait abnormality was almost disappeared spontaneously even if medication was continued. The incidence of the arthropathy was not or rarely observed in any young rats, rabbits and monkeys.

Aging↗
PubMed1977

Periodic EEG patterns observed in two cases with partial seizures.

Two cases with partial seizure and periodic EEG pattern were reported. Case 1. A 74-year-old woman reveal typical periodic lateralized epileptiform discharges (PLED's) on the right hemisphere. The patient was semicomatous with mild jaundice and epilepsia partialis continua in the left lower limb. Postmortem examination revealed a main metastatic carcinoma of pancreas head origin in the right parietooccipital region. In the right hemisphere, the cortical structures were relatively preserved, but the white matter including the frontal lobe was swollen and its demyelinating changes were observed diffusely. The PLED's might result from an anatomical or functional severance of the cerebral cortex from normal connections with deeper structures. Case 2. A 61-year-old woman, with idiopathic hypoparathyroidism showed partial complex seizure. The EEG revealed an anterior temporal spike focus and slowing in the right hemisphere, corresponding with repetitive seizures of about one minute duration and with several minutes interval. An interictal periodic EEG pattern appeared in the right anterior and mid-temporal region. No cerebral abnormalities were found with other neurological examinations including brain scanning, carotisangiogram, and echoencephalogram. The periodic pattern was assumed as subclinical focal seizure discharges from the right anterior temporal deep structures.

Aged↗