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Biomedical subjects

T Fujiwara

Publications and source records attributed to T Fujiwara.

At least 1,045 records · Page 58Linked to original sources
PubMed1988

Effects of nilvadipine on the cardiovascular system in experimental animals.

The effects of 5-isopropyl 3-methyl 2-cyano-1,4-dihydro-6-methyl-4-(m-nitrophenyl)-3,5-pyridinedicarboxylate (nilvadipine, FR 34235, FK 235) on the cardiovascular system were investigated in isolated organs and whole animals. 1. Nilvadipine inhibited Ca2+-induced contractions of isolated dog coronary artery in high-K+, Ca2+-free medium, and the pA2 value was 10.64. In this effect, nilvadipine was 18 times more potent than nifedipine and 525 times more potent than diltiazem. In contrast, its inhibitory effect on Ca2+-induced contractions of isolated guinea pig atria was weaker (pA2:8.2): only twice that of nifedipine and 25 times that of diltiazem. 2. Nilvadipine also inhibited K+-induced 45Ca2+ uptake in isolated dog coronary arteries and isolated guinea pig atria. In the coronary arteries, the IC50 value of nilvadipine was 2.7 x 10(-10) mol/l, which was, respectively 17, 8, and 589 times lower than that of nifedipine, nicardipine and diltiazem. In the atria, on the other hand, the IC50 value of nilvadipine was 4.4 x 10(-9) mol/l, almost the same as that of nifedipine or nicardipine, and 47 times lower than that of diltiazem. These 45Ca2+ uptake inhibitory effects of the drugs were consistent with their effects on mechanical response in both tissues. 3. Nilvadipine (2.6 x 10(-10) mol/l and higher) dose-dependently inhibited ergometrine (ergonovine)-, serotonin-, and norepinephrine-induced contractions of isolated dog coronary artery, and its effects were 2 to 450 times more potent than those of nifedipine, nicardipine and diltiazem. 4. Nilvadipine (2.6 x 10(-8) mol/l or more, 32 micrograms/heart or more), like nifedipine, produced negative inotropic and chronotropic effects in isolated guinea pig atria and in dog heart-lung preparation, and was more potent than nifedipine in the negative chronotropic effect. 5. Nilvadipine in intravenous doses of 1-32 micrograms/kg decreased total peripheral resistance and systemic blood pressure, and slightly increased cardiac output, pulmonary arterial blood flow and stroke volume, but had no significant effects on pulmonary vascular resistance or pulmonary arterial blood pressure. Heart rate decreased at doses of 32 micrograms/kg or more. Nifedipine had almost the same effects as nilvadipine on total peripheral resistance and blood pressure, but was more potent than nilvadipine in increasing effects on cardiac output, stroke volume and pulmonary arterial blood flow.(ABSTRACT TRUNCATED AT 400 WORDS)

Animals↗
PubMed1988

[Serum CA125 and CA19-9 levels in adenocarcinoma of the uterine cervix and endometrial carcinoma].

The changes in serum CA125, CA19-9, CEA, Ferritin, TPA, IAP and LDH concentrations were measured in 22 primary cases and 7 recurrent cases of adenocarcinoma of the uterine cervix and endometrial carcinoma in order to examine the clinical usefullness of CA125 and CA19-9 as a tumor marker. Localization of CA125 and CA19-9 was also examined in adenocarcinoma, normal endocervix and endometrium immunohistochemically. 1. Twenty-seven percent of primary cases had increased serum CA125 and CA19-9 which decreased rapidly after operation or chemotherapy, reflecting reduction of the tumor mass. 2. In these cases, CA125 or CA19-9 was localized in carcinoma tissues immunohistochemically. On the other hand, in normal endocervical and endometrial glands, CA125 was localized, but CA19-9 was not. 3. In most recurrent cases, serum CA125 and CA19-9 increased early and markedly, compared with the other markers. 4. The change in serum Ferritin, CEA, TPA, IAP and LDH didn't reflect clinical courses such as operation and chemotherapy. In recurrent cases they increased even more slowly and slightly than CA125 or CA19-9. These results show that CA125 and CA19-9 are useful tumor markers in the management of adenocarcinoma of the uterine cervix and endometrial carcinoma, especially in advanced or recurrent cases.

Adenocarcinoma↗
PubMed1988

[Effect of hypertension on asymmetrical septal hypertrophy: an echocardiographic study].

The effect of hypertension on asymmetrical septal hypertrophy was studied by echocardiography to differentiate idiopathic asymmetrical septal hypertrophy (ASH) from ASH with hypertension. One hundred eight patients with ASH proven by echocardiography were categorized in two groups; 53 patients with hypertension (greater than 160 systolic, greater than 95 diastolic) (hypertensive group: HT) and 55 patients with normal blood pressure (normotensive group: NT). Septal hypertrophy was classified as mid-portion (M-type), diffuse (D-type), and basal (B-type) hypertrophy by the long-axis view, and also diffuse (I-type), anterolateral (II-type), anteroseptal (III-type), and anterior septal (IV-type) by the short-axis view, respectively. Endomyocardial biopsy and left ventriculography were performed in 50 patients (18 hypertensives and 32 normotensives). In the hypertensive group, 45%, 30%, and 25% of cases had diffuse, basal and mid-portion hypertrophy, respectively. There was no case in the basal hypertrophy whose biopsy findings were compatible with hypertrophic cardiomyopathy. In the normotensive group, 78% and 22% of patients had midportion and diffuse hypertrophy, respectively, but none of them had the basal hypertrophy. Type IV was seen in only six patients in the normotensive group.

Adult↗
PubMed1988

[Detection of perinatal Chlamydia trachomatis infection by an enzyme immunoassay method].

During the one year period from February 1986 to January 1987, 839 pregnant women were screened for Chlamydia trachomatis infection of the uterine cervical canal by the enzyme immunoassay (EIA, Chlamydiazyme) method. Out of 768 normal pregnant women positive results were obtained in 21 women for a positive rate of 2.7%. In none of 64 women with spontaneous abortion or 7 women with stillbirth were positive results obtained. In 20 of EIA positive women labor was controlled. Extraordinary maternal abnormalities were not seen through labor and puerperium. Out of 21 babies born to these 20 pregnant women, chlamydial pneumonitis developed in 2 babies (10%) and chlamydial conjunctivitis in 1 baby (5%) and these babies were treated. Urethral samples were taken from 16 husbands of EIA positive women, and they were all EIA negative. As to the correlation between EIA and the culture method using HeLa 229 cells, the consistency rate was 78% (n = 18) for positive results and 100% (n = 66) for negative results. Chlamydial IgG antibodies were assayed in 19 out of 21 cases, and all of them yielded positive results. From these results, the importance of screening for Chlamydia trachomatis infection in our country was affirmed.

Adult↗
PubMed1988

[Studies on tissue PO2 and biochemical analysis of the skeletal muscle of legs with chronic arterial occlusive diseases].

Measurements of maximum tissue PO2 during 100% O2 inhalation (PtO2max) and biochemical analysis of the skeletal muscle were performed in 3 legs without ischemia and 14 legs with chronic arterial occlusive disease requiring amputation. There were significant good correlations between PtO2max and levels of pH, lactate, enzymes (CPK, LDH, Aldolase) and ATP in the skeletal muscle with ischemia. In regions in which PtO2max was below 10mmHg, ischemic changes in the muscle were considered to be irreversible. On the contrary, primary wound healing was obtained in regions with 40mmHg or more of PtO2max. Measurements of the PtO2max of the ischemic muscles provided much useful information concerning the reversibility of muscle ischemia and for decision of the amputation level.

Adenosine Triphosphate↗
PubMed1987

Chemical synthesis of the trisaccharide unit of the species-specific phenolic glycolipid from Mycobacterium leprae.

O-(3,6-Di-O-methyl-beta-D-glucopyranosyl)-(1----4)-O-(2,3-di-O-methyl- alpha-L-rhamnopyranosyl)-(1----2)-3-O-methyl-L-rhamnopyranose, the haptenic trisaccharide of the Mycobacterium leprae-specific phenolic glycolipid I (PGL-I) antigen, and related trisaccharides, were synthesized by allylation of O-2 of benzyl 4-O-benzyl-alpha-L-rhamnopyranoside using phase-transfer catalysis, methylation of the product, deallylation, and coupling to O-(2,4-di-O-acetyl-3,6-di-O-methyl-beta-D-glucopyranosyl)-(1----4)-2,3- di-O-methyl-L-rhamnopyranosyl bromide or related disaccharides. Anomeric mixtures of the trisaccharide derivatives were separated by preparative t.l.c., deacetylated, and hydrogenolyzed, to give the pure trisaccharides. It had already been demonstrated that only those trisaccharides containing an intact, terminal 3,6-di-O-methyl-beta-D-glucopyranosyl unit are effective in inhibiting the specific binding between PGL-I and anti-PGL-I immunoglobulin M antibodies in human lepromatous leprosy sera.

Antigen-Antibody Complex↗