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  • 1995-1999  (4)
  • 1975-1979
  • 1950-1954
  • pharmacokinetics  (3)
  • Bamboo mosaic potexvirus  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Paracetamol disposition in Thai patients during and after treatment of falciparum malaria (1995)
    Springer
    European journal of clinical pharmacology 48 (1995), S. 65-69 
    Details
    ISSN: 1432-1041
    Schlagwort(e): Paracetamol ; Malaria ; pharmacokinetics ; phase II conjugation ; glucuronidation ; sulphation
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Medizin
    Notizen: Abstract Investigations in animals have suggested that conjugation of paracetamol may be reduced in malaria. We have measured plasma concentrations and the urinary excretion of paracetamol and its phase II metabolites in eight Thai patients during uncomplicated falciparum malaria and in convalescence, following a 1000 mg single oral dose. The apparent oral clearance (Malaria, 3.6; Convalescence, 3.9; ml·min−1·kg−1), the elimination half-life (Malaria, 3.8; Convalescence, 3.7 h) and apparent volume of distribution (Malaria, 1.2; Convalescence, 1.2; l·kg−1) of paracetamol were similar during malaria and convalescence. In addition, the urinary excretion of paracetamol and its major phase II metabolites and their formation clearances from paracetamol were not significantly different between the two study phases. These data show that clinical malaria infection has no effect on the conjugation of paracetamol in man.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00202175
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Pharmacokinetics and bioavailability of oral and intramuscular artemether (1997)
    Springer
    European journal of clinical pharmacology 52 (1997), S. 307-310 
    Details
    ISSN: 1432-1041
    Schlagwort(e): Key words Artemether ; Thai males; malaria ; dihydroartemisinin ; pharmacokinetics ; bioavailability
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Medizin
    Notizen: Abstract Objective: The pharmacokinetics and bioavailability of artemether and dihydroartemisinin were investigated in eight Thai males following the administration of single oral and intramuscular doses of artemether (300 mg) in a randomized two-way cross-over study. Results: Both oral and intramuscular artemether were well-tolerated. In most cases, artemether and dihydroartemisinin were detected in plasma after 30 min and declined to levels below the limit of detection within 18–24 h. Compared with intramuscular administration, oral administration of artemether resulted in a relatively rapid but incomplete absorption [Cmax: 474 vs 540 ng · ml−1; t max: 2.0 vs 3.9 h; AUC: 2.17 vs 5.20 μg · h · ml−1]. Geographic means of lag-time and absorption half-life (t 1/2a) of oral vs intramuscular artemether were 0.28 and 1.1 h vs 0.30 and 2 h, respectively. t 1/2z was significantly shortened after the oral dose [2.8 vs 6.9 h]. Mean oral bioavailability relative to intramuscular administration was 43.2%. The ratio of the AUCs of artemether to dihydroartemisinin was significantly lower after the oral than after the intramuscular dose (geometric mean: 0.29 vs 0.60).
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s002280050295
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  • 3
    Digitale Medien
    Digitale Medien
    Pharmacokinetics of quinine in patients with chronic renal failure (1996)
    Springer
    European journal of clinical pharmacology 49 (1996), S. 497-501 
    Details
    ISSN: 1432-1041
    Schlagwort(e): Quinine ; Malaria ; pharmacokinetics ; chronic renal failure
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Medizin
    Notizen: Abstract Methods: We investigated the pharmacokinetics of quinine (Qn) following administration of a single oral dose of 600 mg Qn sulphate in six male Thai patients with a moderate degree of chronic renal failure (CRF), and six male Thai subjects with normal renal function. Results: The drug was well tolerated in both groups of subjects; no major adverse reactions were observed. A marked alteration in the pharmacokinetics of Qn was found in patients with CRF compared to healthy subjects; there were six signifiicant changes in the pharmacokinetic parameters. Absorption was delayed, but increased in CRF (tmax 4.5 vs 1.6 h, Cmax 6.17 vs 3.45 μg·ml−1). Total clearance was significantly reduced 0.94 vs 2.84 ml·min−1·kg−1, whereas Vz/f remained unchanged (1.82 vs 2.78 1·kg−1). This resulted in the increased values of AUC and prolongation of the t1/2z and MRT in the patients (AUC 181.5 vs 61.8 μg·min−1·ml−1, t1/2z 26 vs 9.7 h, MRT 36.4 vs 11.3 h). Median concentrations of plasma unbound fraction of Qn collected at 4 h after drug administration in patients and healthy subjects were 7.3 vs 9.8%, respectively.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00195937
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  • 4
    Digitale Medien
    Digitale Medien
    A Defective RNA Associated with Bamboo Mosaic Virus and the Possible Common Mechanisms for RNA Recombination in Potexviruses (1999)
    Springer
    Virus genes 18 (1999), S. 121-128 
    Details
    ISSN: 1572-994X
    Schlagwort(e): Bamboo mosaic potexvirus ; defective RNA ; RNA combination
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract A naturally occurring 1.1 kb RNA was isolated from purified virions of bamboo mosaic potexvirus isolate S (BaMV-S). This RNA is a defective RNA (D RNA) derived from a single internal deletion of the BaMV genome. A cDNA clone representing the complete nucleotide sequence of the BaMV-S D RNA was generated and its nucleotide sequence was determined. The BaMV D cDNA is 1015 nts in length [excluding the poly(A) tail] and consists of two regions corresponding to 867 nts of the 5′ terminus and 148 nts of the 3′ terminus of the BaMV genomic RNA. BaMV D cDNA contains a single open reading frame (ORF) encoding a putative 29.7 kDa protein comprised of a fusion of the first 258 amino acids of BaMV ORF 1 and the last 2 amino acids of coat protein. The coding capacity of D RNA was verified by in vitro translation of native BaMV-S D RNA and of 1.1 kb RNA transcribed in vitro from the full-length D cDNA. BaMV D RNA can be reproducibly generated by serial passages of BaMV-S in Nicotiana benthamiana and is the first D RNA in the potexvirus group shown to be generated de novo. Alignments of sequences surrounding the 5′ and 3′ junction borders of reported potexvirus D RNAs reveal a 65.2–84.6% sequence identity, suggesting that common mechanisms for viral RNA recombination are involved in the generation of potexvirus D RNAs.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1008008400653
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