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  • 1
    Electronic Resource
    Electronic Resource
    Syntheses of amino acids from unsaturated aliphatic carboxylic acid by contact glow discharge electrolysis (1978)
    Springer
    Cellular and molecular life sciences 34 (1978), S. 17-18 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Hydroxy amino acids are synthesized from unsaturated aliphatic carboxylic acid using aqueous ammonia under conditions of contact glow discharge electrolysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01921874
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  • 2
    Electronic Resource
    Electronic Resource
    Combined protein and DNA measurements by the ninhydrin-Schiff and Feulgen techniques (1979)
    Springer
    Histochemistry and cell biology 63 (1979), S. 35-45 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Feulgen nuclear staining with pararosanilin-SO2 was combined with the ninhydrin-Schiff technique. The aldehyde groups converted from primary amino groups are stained with an acriflavine-Schiff reaction. This results in a red nuclear fluorescence and a bright yellow cytoplasmic and nuclear fluorescence. The combined fluorescence staining facilitates cytofluorometric determination of total protein and DNA in the same cell. The ninhydrin-Schiff reaction is affected by the fixation procedure and the duration of the ninhydrin reaction. Investigations with a model system showed that proportionality beween the fluorescence intensity of acriflavine and the amount of protein stained by the procedure was obtained after fixation with a fixation mixture suggested by Böhm et al. (1968) and a reaction with ninhydrin at 37° C for 10 h. The ninhydrin-Schiff reaction has no effect on the fluorescence intensity of cells previously treated with pararosanilin-Feulgen staining and it is not affected itself by this previous procedure. Testing this double fluorescence staining on cytology specimens taken from patients with gastric carcinoma and uterine cervial carcinoma, cancer cells were shown to have markedly increased protein and DNA contents compared with those of normal cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00508010
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of α1-adrenoceptor antagonists, prazosin and urapidil, on a finger skin vasoconstrictor response to cold stimulation (1996)
    Springer
    European journal of clinical pharmacology 49 (1996), S. 371-375 
    Details
    ISSN: 1432-1041
    Keywords: Prazosin ; Urapidil ; Vasoconstrictor response ; laser Doppler flow ; finger tip blood flow ; cold stimulation ; healthy volunteers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Abstract Objectives: Cold stimulation causes a finger skin vasoconstrictor response, which is regulated by stimulation of α-adrenergic receptors and is reduced by administration of prazosin. The purpose of this study was to investigate, using a laser Doppler flowmeter, whether the decrease in the finger skin vasoconstrictor response to cold stimulation produced by administration of two different α1-adrenoceptor antagonists, prazosin and urapidil, was correlated with the corresponding plasma drug concentration, and whether this method could be used to evaluate the relative potency of these α1-adrenoceptor antagonists in human subjects. Method: In thirteen healthy male subjects (20–42 y), finger tip skin blood flow was measured during cold stimulation before and 1, 2, 3, 6, and 9 h after administration of placebo, prazosin (1 mg) or urapidil (60 mg). Results: Both prazosin and urapidil significantly decreased the vasoconstrictor response to cold stimulation. The degree of the decrement in the response indicated by the reduction ratio was significantly correlated with the plasma concentration of prazosin and urapidil. The α1-adrenoceptor blocking activity of prazosin estimated by the regression lines was about 130-times more potent than that of urapidil. Conclusion: These findings suggest that the cold stimulation response of finger skin vasoconstriction may be used to evaluate the relative α1-adrenoceptor blocking potency of drugs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00203780
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  • 4
    Electronic Resource
    Electronic Resource
    Renal clearance of lomefloxacin is decreased by furosemide (1994)
    Springer
    European journal of clinical pharmacology 46 (1994), S. 267-269 
    Details
    ISSN: 1432-1041
    Keywords: Lomefloxacin ; Furosemide ; Renal clearance ; drug interaction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Abstract The interaction between lomefloxacin, a new quinolone, and furosemide, a loop diuretic, has been examined. Oral lomefloxacin 200 mg and furosemide 40 mg were given together or separately to 8 healthy subjects, and blood and urine samples were obtained over the following 12 h. The plasma concentrations of lomefloxacin following coadministration with furosemide were higher than after lomefloxacin alone and its AUC was increased, and its total and renal clearances were decreased. No change in the pharmacokinetics of furosemide was found after coadministration of lomefloxacin. As quinolones and furosemide are reported to be excreted in urine by the renal tubular anion transport system, the present results suggest that the renal tubular secretion of lomefloxacin is diminished by furosemide. It is not clear whether this pharmacokinetic interaction might be clinically important.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00192560
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  • 5
    Electronic Resource
    Electronic Resource
    Influence of age on venodilator effect of isoproterenol and amrinone (1996)
    Springer
    European journal of clinical pharmacology 50 (1996), S. 37-40 
    Details
    ISSN: 1432-1041
    Keywords: Key words Isoproterenol ; Amrinone ; Elderly; venodilation ; age-related change ; dorsal hand vein technique
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Abstract Objective: To investigate the influence of age on the venodilator effect of isoproterenol, a β-adrenoceptor agonist, and amrinone, a selective phosphodiesterase (PDE) III inhibitor, in human subjects. Methods: In eight young and eight elderly male subjects, the drugs were infused into a dorsal hand vein preconstricted with phenylephrine and its diameter was measured using a linear variable differential transformer. Results: The maximum venodilation (Emax) induced by isoproterenol was significantly smaller and the infusion rate of isoproterenol required to induce 50% of maximum venodilation (ED50) was significantly larger in the elderly than in the young subjects [Emax: 29.8 vs 95.1%, ED50: 97.3 vs 51.6 ng ⋅min–1]. A significant age-related change in Emax or ED50 was not observed for amrinone (Emax: 95.8 vs 100.8%, ED50: 40.1 vs 31.6 μg ⋅min–1). Conclusion: The data show that the venodilator effect of amrinone is not influenced by age. As amrinone increases cyclic AMP by inhibition of PDE III, it is suggested that the action of cyclic AMP is not altered by age. The decreased effect of isoproterenol might be caused by reduced production of cyclic AMP in elderly subjects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002280050066
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  • 6
    Electronic Resource
    Electronic Resource
    Effect of ranitidine on renal clearance of lomefloxacin (1996)
    Springer
    European journal of clinical pharmacology 51 (1996), S. 95-98 
    Details
    ISSN: 1432-1041
    Keywords: Key words Lomefloxacin ; Ranitidine; renal clearance ; drug interaction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Abstract Objective: To examine the effect of ranitidine on the renal clearance of lomefloxacin. Setting: Department of Clinical Pharmacology, Jichi Medical School. Methods: Lomefloxacin 200 mg and ranitidine 300 mg or its placebo were given orally in a randomised, double-blind, crossover design. Blood and urine samples were obtained during a 24-h period after dosing. Results: The area under the plasma concentration-time curve and the elimination half-life of lomefloxacin were significantly increased following coadministration with ranitidine. These effects were caused by significant decreases in total (7.8%) and renal (22%) clearance of lomefloxacin. In contrast, creatinine clearance and urinary excretion of electrolytes were not influenced by ranitidine. Conclusion: As lomefloxacin and ranitidine are excreted in urine by renal tubular secretion, the present results suggest that the renal tubular secretion of lomefloxacin is diminished by ranitidine. As the reduction in lomefloxacin clearance is only marginal, it is probable that the drug interaction observed in this study is not of clinical significance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002280050167
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  • 7
    Electronic Resource
    Electronic Resource
    Effects of dopamine on veins in humans: comparison with noradrenaline and influence of age (1998)
    Springer
    European journal of clinical pharmacology 54 (1998), S. 227-230 
    Details
    ISSN: 1432-1041
    Keywords: Key words Noradrenaline ; Dopamine ; Venoconstriction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Abstract Objective: To compare the venoconstricting effect of dopamine with that of noradrenaline and to investigate the influence of age on the responsiveness to dopamine in human subjects. Methods: In eight young and eight elderly male subjects, increasing doses of dopamine or noradrenaline were infused into a dorsal hand vein and its diameter was measured using a linear variable differential transformer. Results: There was no significant difference between the maximum venoconstriction (Emax) for dopamine and that for noradrenaline. The infusion rate to induce 50% of Emax (ED50) for dopamine in the young and elderly subjects was 363 ng · min−1 and 352 ng · min−1, and the ED50 for noradrenaline was 40.7 ng · min−1 and 43.8 ng · min−1, respectively. Neither in the Emax nor in the ED50 for these drugs were there significant differences between the young and elderly subjects. Conclusion: The venoconstricting effect of dopamine is 5–20 times less than that of noradrenaline, and aging does not influence the responsiveness to dopamine and noradrenaline in human subjects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002280050450
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  • 8
    Electronic Resource
    Electronic Resource
    Effect of α1-adrenoceptor antagonists, prazosin and urapidil, on a finger skin vasoconstrictor response to cold stimulation (1996)
    Springer
    European journal of clinical pharmacology 49 (1996), S. 371-375 
    Details
    ISSN: 1432-1041
    Keywords: Key words Prazosin ; Urapidil; Vasoconstrictor response ; laser Doppler flow ; finger tip blood flow ; cold stimulation ; healthy volunteers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Abstract Objectives: Cold stimulation causes a finger skin vasoconstrictor response, which is regulated by stimulation of α-adrenergic receptors and is reduced by administration of prazosin. The purpose of this study was to investigate, using a laser Doppler flowmeter, whether the decrease in the finger skin vasoconstrictor response to cold stimulation produced by administration of two different α1-adrenoceptor antagonists, prazosin and urapidil, was correlated with the corresponding plasma drug concentration, and whether this method could be used to evaluate the relative potency of these α1-adrenoceptor antagonists in human subjects. Method: In thirteen healthy male subjects (20–42 y), finger tip skin blood flow was measured during cold stimulation before and 1, 2, 3, 6, and 9 h after administration of placebo, prazosin (1 mg) or urapidil (60 mg). Results: Both prazosin and urapidil significantly decreased the vasoconstrictor response to cold stimulation. The degree of the decrement in the response indicated by the reduction ratio was significantly correlated with the plasma concentration of prazosin and urapidil. The α1-adrenoceptor blocking activity of prazosin estimated by the regression lines was about 130-times more potent than that of urapidil. Conclusion: These findings suggest that the cold stimulation response of finger skin vasoconstriction may be used to evaluate the relative α1-adrenoceptor blocking potency of drugs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002280050034
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  • 9
    Electronic Resource
    Electronic Resource
    Comparison of venodilatory effect of nicardipine, diltiazem, and verapamil in human subjects (1998)
    Springer
    European journal of clinical pharmacology 54 (1998), S. 31-34 
    Details
    ISSN: 1432-1041
    Keywords: Key words Diltiazem ; Verapamil ; Nicardipine ; Vein
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Abstract Objective: Venodilatory effects of calcium antagonists have not been fully investigated, especially in human subjects. The present study was undertaken to compare the direct venodilatory effects of nicardipine, diltiazem and verapamil using the dorsal hand-vein technique. Methods: In eight healthy male subjects, increasing doses (0.001, 0.01, 0.1, 1 and 10 μg · min−1) of these drugs and saline alone were infused, on four separate occasions, into the dorsal hand vein preconstricted with noradrenaline, and its diameter was measured by a linear-variable differential transformer. Result and conclusions: Diltiazem caused significant venodilation at a dose of 0.01 μg · min−1 or more, while verapamil and nicardipine only caused this effect at 1 μg · min−1 or more. The potency of the effect was diltiazem 〉 verapamil 〉 nicardipine. The venodilation at a dose of 1 μg · min−1 was 41.7%, 16.2% and 8.5%, respectively, for each drug. These findings indicate that the venodilatory effect of diltiazem is larger than that of verapamil and nicardipine in human subjects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002280050416
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  • 10
    Electronic Resource
    Electronic Resource
    Therapy for oral squamous cell carcinoma by tegafur and streptococcal agent OK-432 in combination with radiotherapy: Association of the therapeutic effect with differentiation and apoptosis in the cancer cells (1997)
    Springer
    Apoptosis 2 (1997), S. 227-238 
    Details
    ISSN: 1573-675X
    Keywords: Apoptosis ; differentiation ; OK-432 ; oral squamous cell carcinoma ; radiotherapy ; tegafur
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Twenty patients with oral squamous cell carcinoma having mainly stage II or III lesions without distant metastasis, were treated with tegafur and streptococcal agent, OK-432, in combination with radiotherapy. As a consequence, 16 cases among the treated 20 cases showed complete remission by this therapy alone. Especially, we have found that the squamous cell carcinoma arising in non-keratinizing oral epithelium rather than in keratinizing oral epithelium has better response to this therapy. Among the 16 cases with complete remission (CR) by the current therapy, 10 cases were histopathologically diagnosed as well-differentiated squamous cell carcinoma and six cases as moderately differentiated squamous cell carcinoma. When we examined immunohistochemically the expres-sion of various antigens such as proliferating cell nuclear antigen (PCNA), p53 and LeY or the presence of DNA fragmentation by nick-end labelling in the biopsy materials taken at the first visit to our clinic from 20 patients treated with the current therapy, the CR group showed a significantly increased LeY expres-sion level ( p〈 0.05) and DNA fragmentation rate ( p〈 0.05) as compared with the partial response (PR, n= 3) + no change (NC, n= 1) group. On the other hand, the CR group with respect to PCNA expression level was significantly decreased as compared with the PR + NC group ( p〈 0.05). From these findings, it can be considered that the therapy for oral squamous cell carcinoma by UFT and OK-432 in combination with radiotherapy is very effective, which may be associated with differentiation or apoptosis in oral squamous carcinoma cells. In addition, we present the clinical findings and results of immunohistochemical staining for the biopsy materials obtained from four CR cases treated with the current therapeutic method.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026428918301
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