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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Archives of toxicology 69 (1995), S. 379-383 
    ISSN: 1432-0738
    Keywords: Keywords Cyclohexylmethylphosphonofluoridate ; Rhesus monkey ; Serum ; Biochemistry ; Hemotology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Changes in serum biochemical and hematological parameters were studied in 20 male rhesus monkeys following acute poisoning by the organophosphate nerve agent cyclohexylmethylphosphonofluoridate (CMPF or GF). Animals were challenged with 5×LD50 GF (233 μg/kg, IM) following pretreatment with pyridostigmine (0.3–0.7 mg/kg per 24 h) and treated with atropine (0.4 mg/kg, IM) and either 2-PAM (25.7 mg/kg, IM) or HI6 (37.8 mg/kg, IM) at the onset of clinical signs or at 1 min after exposure. Muscle fasciculations, tremors, or convulsions occurred in 19 of 20 animals. Serum biochemical and hematologic parameters were analyzed 2 days and 7 days after exposure and compared to pre-exposure baseline values. Significant increases in creatine kinase (CK), lactate dehydrogenase (LD), aspartate transaminase (AST), alanine transaminase (ALT) and potassium ion (K+), associated with damage to striated muscle and metabolic acidosis, occurred in both oxime-treated groups 2 days after exposure. Total protein, albumin, red blood cell (RBC) count, hemoglobin concentration (Hb) and hematocrit (Hct), were decreased in both oxime-treated groups at 7 days. The results demonstrate that animals exposed to a single high dose of GF and treated with standard therapy exhibit changes in serum biochemical and hematological indices directly and indirectly associated with their clinical presentations.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-136X
    Keywords: Key words Proximal and distal intestine ; Mannitol flux ; Transepithelial electrical resistance ; Enhancement ; Salmon
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The objective of this study was to assess regional variations in the permeability of the salmon posterior intestine and to evaluate the effect of permeability enhancers as a basis for oral delivery of biologically active peptides. Proximal and distal portions of the posterior intestine of the chinook salmon (Oncorhynchus tshawytscha) were removed, mounted as flat sheets in Ussing chambers and superfused with trout Ringer's. Intestinal permeability was assessed under short-circuit conditions by measurement of 14C-mannitol (mucosal to serosal) flux. Tissues were treated either with the mucolytic agent dithiothreitol (10 mmol · l−1), the permeability enhancer sodium deoxycholate (5.0 mmol · l−1) or both and compared to untreated controls. Both proximal and distal control tissues had low permeabilities, but the distal region had a lower transepithelial electrical resistance and produced significantly less mucus. Treatment with either dithiothreitol or sodium deoxycholate alone reduced mucus adhering to tissue in both regions but did not increase permeability or change transepithelial electrical resistance. In the distal region, sequential treatment with both agents significantly reduced adhering mucus, decreased transepithelial electrical resistance, and increased tissue permeability. The salmon posterior intestine can be divided into proximal and distal regions. The distal region is more likely to have the necessary permeability and responsiveness to enhancement for the successful delivery of peptides or polar drugs.
    Type of Medium: Electronic Resource
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