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Biomedical subjects

Y Inada

Publications and source records attributed to Y Inada.

At least 379 records · Page 21Linked to original sources
PubMed1980

Significance of tryptophan residues in the D-domain of the fibrin molecule in fibrin polymer formation.

The modification of fibrin monomer with H2O2 caused reduction of the association activity of fibrin monomer. The association activity was not reduced even by modification of approx. 16 out of the total 64 tryptophan residues in the fibrin molecule; it was then abolished by further modification of the following several residues. Fragment D obtained by proteolysis of fibrinogen with plasmin, inhibited the association activity of fibrin monomer and the modification of approx. six out of the total 21 tryptophan residues in the fragment led to the complete loss of the inhibitory effect. It was concluded from these studies that about six tryptophan residues in the D-domain of fibrin are important for the association of fibrin monomer.

Chemical Phenomena↗
PubMed1980

Cooperativity of albumin and aggrexons A and B for ADP-induced-aggregation of platelets.

Using extensively washed bovine platelets and a chemically defined medium instead of whole plasma, it was demonstrated that aggregation to a near normal extent was induced by ADP only in the presence of at least the following three components from plasma; albumin, Aggrexon A and Aggrexon B. These three proteins apparently acted cooperatively; the elimination of any one of the above mentioned plasma components from the system resulted in marked reduction of the aggregation.

Adenosine Diphosphate↗
PubMed1980

Fibrin membrane endowed with biological function. V. Multienzyme complex of uricase, catalase, allantoinase and allantoicase.

The enzymes (uricase (EC 1.7.3.3), allantoinase (EC 3.5.3.4), and allantoicase (EC 3.5.2.5) which participate in degradation of purine bases, were embedded separately in fibrin membranes formed by fibrinogen-fibrin conversion with thrombin. All of these enzymes together with catalase were also embedded in a single fibrin membrane to make an immobilized multienzyme complex. The multienzyme complex in fibrin membrane thus prepared had an ability of degradation of uric acid to urea and glyoxylic acid via allantoin and allantoic acid. The stability of immobilized uricase or catalase embedded in fibrin membrane upon lyophilization was also tested in a comparison with nonimmobilized enzymes.

Acetates↗
PubMed1980

Acceleration of hypotension and development of stroke in the spontaneously hypertensive rat by unilateral ureteral obstruction.

Unilateral uareteral obstruction (UUO) in 6-week old male spontaneously hypertensive rats (6-w-SHR) accelerated the elevation of blood pressure and developed stroke with high frequency from 3 weeks after operation, whereas UUO had no effect in either 20-week old SHR or 6-week old normotensive Wistar Kyoto rats. Urinary protein excretion and plasma urea and renin concentrations in 6-w-SHR began to increase 2 weeks after UUO. Removal of the obstructed kidney in 6-w-SHR one week after UUO prevented the acceleration of hypertension, while the same treatment 2 weeks after operation did not. In the ureter-obstructed kidneys of 6-w-SHR, hydronephrotic atrophy was markedly observed already one week after operation, while in the opposite kidneys, hypertensive vascular lesions were manifested from the second week. These results indicate that with regard to reversibility of the hypertensive process, the obstructed kidney is more important in the early postoperative stages and the contralateral kidney more important later.

Animals↗
PubMed1980

[Double-blind comparison of L-keflex and cephalexin (Keflex) in dental infections (author's transl)].

In order to evaluate efficacy and safety of L-Keflex (granule form of sustained release cephalexin), a double blind study comparing it with Keflex (capsule of regular cephalexin) was conducted in dental infections. Evaluable cases in adults for efficacy of the drugs were 196 consisting of 97 for L-Keflex and 99 for Keflex. Those in children were 19 (8 for L-Keflex and 11 for Keflex). There were no significant differences in background of the patients and severity of the diseases between both groups (L-Keflex and Keflex groups). The daily doses used in both groups were 1,000 mg in adults and 500 mg in children, respectively. The dose was given in two divided doses for L-Keflex group and in four divided doses for Keflex group. Following are evaluation by the committee members for the study: Adults 1. Clinical response rate at final therapy day was 93.8% in L-Keflex group and 92.9% in Keflex group, showing no significant difference between both groups. 2. No significant difference in severity of subjective and objective symptoms between both groups was observed at each therapy day. 3. Side effects were found in 6.7% of 105 patients receiving L-Keflex and in 5.6% of 107 patients with Keflex, and there was no significant difference between both groups. As the side effects, gastrointestinal symptoms, rash and itching were observed, but no any other side effects were found in both groups. Children 1. As shown in the above, number of the cases enough to evaluate statistically was not obtained, but all of both groups clinically responded to the drugs. 2. As for side effects diarrhea was observed in only one patient of Keflex group consisting of 12 patients. In the patient, however, discontinuation of the drug was not required and the side effect disappeared during the therapy. From the above results, L-Keflex (granule) is judged to have more convenience than Keflex (capsule) in that (1) it can be administered with b.i.d. regimen and (2) it can be easily taken in dental patients such as patients having difficulty in opening mouth of swallowing pain.

Adolescent↗
PubMed1979

Fibrin suspension as a substrate fop plasmin: determination and kinetics.

Fibrin polymers formed from fibrinogen with thrombin in the presence of EDTA were suspended in a medium containing glucose, arabic gum and imidazole-HCl buffer and were sonicated at 20 kHz for 20 min to make a suspension containing fibrin particles of small size. The fibrin suspension was used as a substrate of plasmin for determining the enzymic activity of plasmin and plasminogen activated with urokinase. The kinetic study on the reaction of the fibrin particles with plasmin in the presence and the absence of fibrinogen revealed that Km value of fibrin for plasmin is 4.2 x 10(-7) M and the Ki value of fibrinogen is 1.2 x 10(-5) M.

Electrophoresis, Disc↗
PubMed1979

Inhibition of E coli ATPase activity by a troponin component, TN-I, and by mitochondrial ATPase inhibitor.

The enzymic activity of Mg2+- or Ca2+-stimulated ATPase from Escherichia coli was inhibited by one of the troponin components, TN-I, and by mitochondrial ATPase inhibitor (F1-inhibitor). The inhibitory ability of component TN-I against Mg2+-stimulated AtPase activity was lost after digestion of component TN-I with trypsin. The Mg2+-stimulated ATPase activity inhibited by component TN-I was completely restored by the addition of another troponin component TN-C.

Adenosine Triphosphatases↗
PubMed1979

A mixed antiglobulin test for the detection of immunoglobulin G antibody to lymphocytes.

A mixed antiglobulin test with lymphocytes as test antigens has been developed for the detection of IgG antibodies. Free lymphocytes were counted before and after the addition of anti-D-coated indicator erythrocytes to quantitate the test. The optimal ratio of lymphocytes to indicator erythrocytes was 1: 30. Both anti-T and anti-B lymphocyte antibodies were detected by the test. Nonspecific agglutination of B lymphocytes and detector erythrocytes was avoided by the use of an appropriate dilution of the goat anti-human gamma chain reagent. Unlike cytotoxicity tests it could be used with dead lymphocytes that were frozen and stored intact as well as with live lymphocytes. Lymphocytes were better test antigens than were kidney cells from the same donors in the test. The mixed antiglobulin test with lymphocytes was also more sensitive in the detection of antibodies in hemodialysis patients than was the microlymphocytotoxicity test.

Antibodies, Anti-Idiotypic↗
PubMed1979

Modification of yeast uricase with polyethylene glycol: disappearance of binding ability towards anti-uricase serum.

Uricase from Candida utilis was modified with activated polyethylene glycol (2-O-methoxypolyethylene glycol-4,6-dichloro-s-triazine) of molecular weight of 5,000 daltons. The modification of 43% of the total amino groups in the uricase molecule gave rise to a complete loss of the binding ability towards anti-uricase serum from rabbit. This modified uricase retained 15% of the enzymic activity of non-modified uricase.

Animals↗