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Biomedical subjects

S Takagi

Publications and source records attributed to S Takagi.

At least 487 records · Page 27Linked to original sources
PubMed1988

[Clinical studies on sultamicillin fine granules in the urological field].

Clinical studies of sultamicillin (SBTPC) fine granules, an oral antibiotic with ester linked ampicillin and beta-lactamase inhibitor, sulbactam, were performed in acute uncomplicated cystitis and complicated urinary tract infections. 1. SBTPC fine granules were administrated at a dose of 187.5 mg 2-3 times daily for 5-7 days to 6 patients with acute uncomplicated cystitis. Clinical efficacies as judged according to the criteria of the UTI Committee were excellent in 5 cases and moderate in 1 case with an effectiveness rate of 100%. All of 7 identified bacteria were eradicated by the treatment. 2. SBTPC fine granules were administrated at a dose of 187.5 mg or 375 mg 3 times daily for 5-7 days to 17 patients with complicated urinary tract infections. Clinical efficacies as judged according to the criteria of the UTI Committee were excellent in 8 cases, moderate in 4 cases and poor in 5 cases with an effectiveness rate of 70.6%. Out of 17 identified bacteria, 14 (82.4%) were eradicated by the treatment. 3. As adverse reactions, glossitis, diarrhea and pharyngeal redness were observed in 1 case out of 31 cases treated with the drug. These symptoms, however, were mild and transient. No abnormal laboratory test values were observed. From the above results, it appears that SBTPC fine granules are useful in the treatment of urinary tract infections.

Administration, Oral↗
PubMed1988

[A case of ophthalmoplegic migraine with cerebral aneurysm].

A case of ophthalmoplegic migraine with cerebral aneurysm is reported. A 47-year-old female with a 17-year history of migraine was admitted. She had three attacks of severe migrainous headache accompanied with nausea and vomiting within three weeks. Soon after the third attack, she noticed diplopia and left blepharoptosis. Lumbar puncture revealed no hemorrhage but the cerebral angiogram demonstrated an aneurysm at the junction of the left internal carotid artery and the posterior communicating artery. Operation revealed that the oculomotor nerve was not compressed by the aneurysm. But the oculomotor nerve had an indentation produced by the posterior communicating artery at 1-2 mm distal to the midbrain. A piece of sponge was then inserted between the nerve and the responsible artery. After the operation, her oculomotor nerve palsy was gradually improved and she discharged with mild anisocoria. The exact pathogenesis of ophthalmoplegia in ophthalmoplegic migraine is still unknown. In our case, cross compression of the oculomotor nerve with dilated posterior communicating artery seemed to be the cause of ophthalmoplegia.

Cerebral Arteries↗
PubMed1988

[First pass effect by infusing 99mTc-human serum albumin into the hepatic artery].

The fundamental principles of intra-arterial infusion chemotherapy are thought to be increased local drug concentration and the "first-pass" effect. The concentration in the rest of the body can only be decreased if there is local elimination of the infused drug before reaching the systemic circulation. This is referred to as the "first-pass" effect. In the evaluation of "first-pass" effect, the uptake of liver after infusing 99mTc-human serum albumin (99mTc-HSA) in the hepatic artery by injecting the subcutaneously implanted silicon reservoir was compared with that obtained after intravenous administration of 99mTc-HSA. In order to remove the factor of portal infusion, each count of liver up take had been continued for only 24 seconds after starting the liver uptake. The results are as follows: for 24 cases excepting 6 cases with catheter obstruction, the mean i.a./i.v. ratio was 7.92 +/- 3.34 (range 3.25 to 17.25). Although the elimination rate of drugs in the liver varies with each drug, the infusion of intraarterial chemotherapy should be about 8 times more concentrative than intravenous administration on the "first-pass" effect.

Heart↗
PubMed1987

Spatial and temporal expression pattern of N-cadherin cell adhesion molecules correlated with morphogenetic processes of chicken embryos.

N-cadherin is a Ca2+-dependent cell-cell adhesion molecule, which was identified in brain cells of mouse and chicken. In the present study, we have determined the pattern of expression of N-cadherin in chicken embryos at various stages by means of immunohistochemistry. N-cadherin was expressed in cells derived from all three primary germ layers. Its expression was transient in many tissues but permanent in others. The transient expression occurred in nephric tubules, skeletal muscles, mesenchymal tissues, endodermal organs, and epidermis, while the permanent expression occurred in nervous systems, lens, and myocardiac cells. Appearance or disappearance of N-cadherin could be generally correlated with morphogenetic events, such as rearrangement, segregation, or association of cells. Comparison of the expression pattern of N-cadherin with that of L-CAM and N-CAM determined by other workers suggests that there is some mechanism controlling expression of multiple classes of adhesion molecules. The pattern of expression of N-cadherin was generally complementary to that of L-CAM; that is, if N-cadherin appeared, L-CAM disappeared or vice versa. We also found cases in which N-cadherin was expressed in the same local regions as L-CAM. The distribution of N-cadherin was similar to that of N-CAM with some exceptions. Thus, N-cadherin and other cell-cell adhesion molecules seem to be expressed under a precise spatial and temporal control so as to be associated with a variety of morphogenetic events during development.

Animals↗
PubMed1987

Specific cell surface labels in the visual centers of Xenopus laevis tadpole identified using monoclonal antibodies.

Monoclonal antibodies (MAbs) against the optic tectum of Xenopus tadpoles were generated and screened by the immunofluorescent staining of frozen sections of tadpole brains. MAb-A5 stains the 8th and 9th plexiform layers of the optic tectum, whereas MAb-B2 stains all but the eighth and ninth plexiform layers of the optic tectum. MAb-A5 antigen is also detectable in the nucleus of Belonci, the corpus geniculatum thalamicum, the pretectal area, and the basal optic nucleus, all targets of the optic nerve, but is not detectable in the optic nerve or the optic tract. On the other hand, MAb-B2 does not stain any of these visual centers, though many fibers surrounding them are stained. Eye-enucleation experiments showed that MAb-A5 antigen is expressed in the optic tectum even when it is not innervated by optic nerves. Staining of viable brains with these MAbs indicates that these antigens are cell surface molecules. Immunoadsorption followed by SDS-PAGE suggests that proteins are constituents of these antigens. The MAb-A5 antigen in the diencephalon and the mesencephalon is not detectable at stage 35/36, but is detectable at stage 39 when the optic nerves begin to innervate the optic tectum. The spatial as well as the temporal patterns of the expression of the MAb-A5 antigen suggest that this molecule may be involved in the target recognition of optic nerve fibers.

Animals↗
PubMed1987

Evidence that estrogen may be a key factor in hyperprolactinemic anovulation: a case report.

Although anovulation associated with hyperprolactinemia is not an uncommon cause of infertility, the precise mechanism of the pathogenic process that induces hyperactivity (hypertrophy with hyperplasia) of pituitary lactotropes is unknown. We have recently experienced a case of anovulation and hyperprolactinemia in a woman with ergot alkaloid intolerance in whom ovulation was restored by tamoxifen citrate administration. Since tamoxifen citrate administration also suppressed prolactin levels, it was suggested that a low but sustained serum level of estradiol and consequently continuous estrogenic stimulation may be an important causative factor in the development of hyperprolactinemic anovulation.

Adult↗
PubMed1987

Effects of diltiazem on left ventricular diastolic behavior in patients with hypertrophic cardiomyopathy: evaluation with exercise pulsed Doppler echocardiography.

To estimate the effects of diltiazem on the left ventricular diastolic abnormalities in patients with hypertrophic cardiomyopathy, transmitral flow velocity during diastole was studied before and immediately after dynamic leg exercise with the pulsed Doppler technique combined with two-dimensional echocardiography. Seventeen patients with hypertrophic cardiomyopathy and 24 apparently healthy men performed bicycle ergometer exercise in the supine position with the target heart rate set at 120 beats/min. The patients with cardiomyopathy were directed to perform the exercise at the same intensity after receiving 30 to 60 mg of diltiazem, three times daily, for 1 or 2 weeks. The pattern of transmitral flow velocity in diastole had two components, one corresponding to the rapid filling phase in early diastole and the other to the atrial contraction phase in late diastole. To assess left ventricular diastolic behavior, the following variables were analyzed: peak velocity in the rapid filling and atrial contraction phases, the ratio of peak velocity in the atrial contraction phase to that in the rapid filling phase, and pressure half-time. The changes in peak velocity in the atrial contraction phase, pressure half-time and the ratio of peak velocity in the atrial contraction phase to that in the rapid filling phase with exercise differed significantly between patients with hypertrophic cardiomyopathy with no medication and control subjects. After diltiazem, the response of these variables to exercise was almost identical in the two groups. These results suggest that diltiazem can lessen the left ventricular diastolic abnormality in patients with hypertrophic cardiomyopathy on dynamic exercise of mild intensity.

Adult↗
PubMed1987

Enhanced enamel F uptake by monocalcium phosphate monohydrate gels.

Application of DCPD-forming solutions has been shown to increase substantially the enamel reactivity toward F. The effectiveness of a variation of this treatment procedure, in which the DCPD-forming solution was replaced by a viscous carboxymethylcellulose gel containing monocalcium phosphate monohydrate (MCPM), was evaluated by use of 12 extracted human molars. The MCPM gel was highly effective in enhancing the F uptake by enamel. The mean F uptakes by teeth treated with MCPM gel, followed by exposure to a F solution, were 3972 (+/- 565), 2383 (+/- 312), and 1751 (+/- 313) ppm, respectively, in the outer 5-, 10-, and 15-microns depths in enamel. These uptakes were 2374, 1273, and 852 ppm more than those of the control teeth. Because the F solution was undersaturated with respect to CaF2, the F incorporated into the enamel was believed to be in apatitic form and not as CaF2. The MCPM gel has advantages over the DCPD-forming solution because (1) much longer gel-tooth contact times can be achieved, and (2) the treatment agent can readily be delivered to specific sites where the tooth needs the protection most.

Apatites↗
PubMed1987

The effectiveness of a cation resin (Kayexalate) as an adsorbent of paraquat: experimental and clinical studies.

The cation-exchange-resin Kayexalate has an adsorption capacity for paraquat 15 times greater than activated charcoal and 6 times greater than Adsorbin. The oral LD50 of paraquat in rats rose 2.1 times by intragastric injection of Kayexalate. In the present study, the survival rate of rats given Kayexalate or Adsorbin after paraquat administration was examined. Results of clinical studies on 22 patients are also presented.

Animals↗
PubMed1987

A study of cytoplasmic and nuclear estrogen and progestin receptors in gynecologic neoplasms.

A rapid method for simultaneous preparation of cytosol and nuclear estrogen (E) and progestin (P) receptors and their in vitro determination is described. The method was applied to several uterine or ovarian surgical specimens to evaluate their steroid hormone "dependence". The results suggest that low cytoplasmic E receptor levels (ERc) are associated with higher nuclear E receptor (ERn) levels but no apparent correlation was observed between PRc and ERn levels. The method appeared to be suitable for screening steroid hormone receptor content in tumor tissues and may provide better estimation of steroid dependence since both cytoplasmic and nuclear compartments can be studied simultaneously.

Adult↗
PubMed1987

Pathophysiological role of thyroid blocking antibody in patients with primary hypothyroidism.

The pathophysiological role of thyroid blocking antibody (TBAb) in patients with adult primary hypothyroidism and the mechanism of TBAb action were studied. A sensitive bioassay for TBAb, which inhibits the TSH-induced cAMP accumulation, was established using normal human thyroid cells in culture. Thirty-four patients with primary hypothyroidism consisting of 17 goitrous and 17 non-goitrous patients were examined. Two out of 17 goitrous patients (11.8%) and three out of 17 non-goitrous patients (17.6%) were TBAb positive. There were no significant differences between TBAb positive and negative patients in terms of the severity of hypothyroidism or the titers of MCHA or TGHA. Four out of the five TBAb-positive IgGs had strongly positive thyrotropin binding inhibitor immunoglobulin activities. All five TBAb-positive IgGs inhibited the cAMP increase induced by Graves' IgG, but did not affect the action of either prostaglandin E1 or cholera toxin. However, three TBAb positive IgG also inhibited the cAMP increase induced by forskolin. These findings indicate: 1) TBAb is present in hypothyroid patients with autoimmune thyroiditis and TBAb may play a role in the pathophysiology of these patients. 2) TBAb may inhibit the action of TSH not only at the level of the TSH receptor, but also at a different site from the TSH receptor.

Adolescent↗