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  • 1990-1994  (4)
  • pharmacokinetics  (2)
  • Cytochromec oxidase
  • Gene expression
  • Physics
  • 1
    ISSN: 1432-0533
    Keywords: In situ hybridization ; Mitochondrial DNA ; Mitochondrial myopathy ; Ophthalmoplegia ; Cytochromec oxidase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary To determine whether a mitochondrial mRNA deficiency exists in mitochondrial myopathies, muscle biopsies from a patient with chronic progressive external ophthalmoplegia (CPEO) and a patient with mitochondrial myopathy, encephalopathy, lactic acidosis and stroke-like episodes (MELAS) were studied using in situ hybridization. Histochemistry and immunohistochemistry were performed along with hybridization. Hybridization reactions were widely distributed over the sarcoplasm of all muscle fibers in the patient with MELAS. In the patient with CPEO, 80% of the fibers showed a marked decrease in density of autoradiographic grains. This marked decrease corresponded to the histochemical and immunohistochemical findings of a very weak staining of cytochromec oxidase (CCO). The isotope-labeled cDNA probe used in in situ hybridization in this study complements a part of subunit I of CCO and a part of subunit II of complex I in the mitochondrial gene. Our results suggest a defect in the mRNA in this CPEO patient.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-069X
    Keywords: Gene expression ; TNF-α ; HSP70 ; BehÇet's disease
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-1041
    Keywords: SUN 1165 ; renal failure ; antiarrhythmic agent ; pharmacokinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The pharmacokinetics of a new Class I antiarrhythmic agent, SUN 1165, has been studied in 32 patients with varying degrees of renal impairment following a single oral dose of 50 mg. The apparent volume of distribution at steady state was 1.48 1 · kg−1, the absorption rate constant was 2.2 h−1, and plasma protein binding was 26.8% in subjects with normal renal function. These variables were not altered with renal impairment. More than 60% of SUN 1165 given orally was excreted unchanged via the kidney, both by tubular secretion and glomerular filtration. The elimination rate constant, the apparent total body clearance and the apparent renal clearance were linearly correlated with the endogenous creatinine clearance. The half-time of elimination was 3.4 h in normal subjects and it was prolonged to 23.7 h in severe renal failure (creatinine clearance below 20 ml · min−1 · 1.48 m−2). Dosage adjustment of SUN 1165 is necessary in renal failure.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Veterinary research communications 17 (1993), S. 129-136 
    ISSN: 1573-7446
    Keywords: calves ; carboxyprimaquine ; pharmacokinetics ; plasma ; primaquine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The pharmacokinetics of primaquine was studied in calves of 180–300 kg live weight. Primaquine was injected at 0.29 mg/kg (0.51 mg/kg as primaquine diphosphate) intravenously (IV) or subcutaneously (SC) and the plasma concentrations of primaquine and its metabolite carboxyprimaquine were determined by high-performance liquid chromatography. The extrapolated concentration of primaquine at zero time after IV administration was 0.50±0.48 µg/ml (mean ±SD) which decreased with an elimination half-life of 0.16±0.07 h. Primaquine was rapidly converted to carboxyprimaquine after either route of administration. The peak concentration of carboxyprimaquine was 0.50±0.08 µg/ml at 1.67±0.15 h after IV administration. The corresponding value was 0.47±0.07 µg/ml at 5.05±1.20 h after SC administration. The elimination half-lives of carboxyprimaquine after IV and SC administration were 15.06±0.99 and 12.26±3.06 h, respectively. The areas under the concentration-time curve for carboxyprimaquine were similar following either IV or SC administration of primaquine; the values were 11.85±2.62 µg.h/ml after the former and 10.95±2.65 µg.h/ml after the latter. The mean area under the concentration-time curve for primaquine was less than 0.1 µg.h/ml after either route of administration.
    Type of Medium: Electronic Resource
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