Involvement of active sodium transport in the rectal absorption of gentamicin sulfate in the presence and absence of absorption-promoting adjuvants
| Autor: | Joseph A. Fix, Paula S. Leppert, Patricia A. Porter |
|---|---|
| Rok vydání: | 1983 |
| Předmět: |
Male
Sodium Inorganic chemistry Pharmaceutical Science chemistry.chemical_element Biological Availability Biological Transport Active Absorption (skin) chemistry.chemical_compound Animals Ouabain Sodium salicylate Adjuvants Pharmaceutic Rectum Rats Inbred Strains Bioavailability Rats Gentamicin Sulfate chemistry Rectal Absorption Intestinal Absorption Ionic strength Gentamicins Choline chloride Nuclear chemistry |
| Zdroj: | Journal of pharmaceutical sciences. 72(6) |
| ISSN: | 0022-3549 |
| Popis: | The involvement of active sodium transport in the rectal absorption of gentamicin sulfate was examined in rats, employing aqueous microenemas of known total ionic strength (mu) in the presence or absence of absorption-promoting adjuvants. Rectal gentamicin bio-availability, which is negligible (1 +/- 1.2%) at an ionic strength of 0.15 without adjuvants, is significantly (p less than 0.01) increased by including adjuvants in the formulation (sodium salicylate, 12 +/- 4.0%; sodium-5-bromosalicylate, 59 +/- 15.1%; disodium ethylene (dinitrilo)tetraacetate, 24 +/- 9.3%). Pretreating the rectal mucosa cells with ouabain, a specific inhibitor of active sodium transport, significantly (p less than 0.01) reduced gentamicin absorption in response to all three adjuvants. In contrast to previous findings with sodium chloride, high ionic strength choline chloride (mu = 1.056) did not promote gentamicin absorption. The data indicate that active sodium transport is an integral component of rectal absorption of water-soluble compounds and may be involved in the mechanism of action of absorption-promoting adjuvants. |
| Databáze: | OpenAIRE |
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