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Tissue distribution and excretion of 99m Tc-disofenin in three marine species: Pleuronectes americanus (winter flounder), Homarus americanus (lobster), and Mya arenaria (soft-shell clam)

Tissue distribution and excretion of 99m Tc-disofenin in three marine species: Pleuronectes... 227 116 116 3 3 P. R. Burn M. S. Potts R. H. Moore A. J. Fischman H. W. Strauss Suffolk University Beacon Hill 02114 Boston Massachusetts USA Massachusetts General Hospital 02114 Massachusetts Boston USA University of New Hampshire 03824 Durham New Hampshire USA Bristol-Myers Squibb 08543 Princeton New Jersey USA Abstract To determine the pharmacokinetics of a small lipophilic molecule in vivo, the distribution and accumulation of 99m Tc-radiolabelled disofenin (diisopropylacetanilide iminodiacetic acid) were traced during 1991–1992 by scintigraphy and gamma well counting in winter flounder ( Pleuronectes americanus collected from Boston Harbor and Long Island Sound in 1992), lobsters ( Homarus americanus collected from Massachusetts Bay in 1991), and soft-shell clams ( Mya arenaria purchased in 1991). The agent was distributed throughout the bodies of lobsters within 12 s, throughout flounder within 40 s, and throughout clams within 2 min. It was concentrated most strongly by the liver of flounder, which contained 61.2±7.8% of the injected dose within 1 h of injection, and by the lobster hepatopancreas. Accumulation also occurred in the flounder kidney, lobster antennal glands, and the kidney and pericardial glands of clams. The compound was rapidly excreted from the flounder liver into the gall bladder, and from the lobster hepatopancreas into the stomach. The data suggest its excretion from the lobster antennal glands and clam kidneys. The rate of clearance of disofenin from the body varied among species: 99±2.1% of the initial dose remained in flounder sampled 16 to 24 h after injection, compared to 80.5±7% remaining in the lobster after 15 h, and 87.4±5.9% remaining in clams after 27 h. The clearance rates in flounder and lobster are considered to be minimum values because of the lack of gut activity in unfed individuals. Overall, these in vivo tracer studies establish the utility of scintigraphy for assessing the uptake and excretion of a lipid soluble compound in different taxa, and may be applicable for evaluating disease and/or environmental effects on organ function in marine animals. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Marine Biology Springer Journals

Tissue distribution and excretion of 99m Tc-disofenin in three marine species: Pleuronectes americanus (winter flounder), Homarus americanus (lobster), and Mya arenaria (soft-shell clam)

Marine Biology , Volume 116 (3) – Jul 1, 1993

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References (15)

Publisher
Springer Journals
Copyright
Copyright © 1993 by Springer-Verlag
Subject
Life Sciences; Biomedicine general; Oceanography; Ecology; Microbiology; Zoology
ISSN
0025-3162
eISSN
1432-1793
DOI
10.1007/BF00350052
Publisher site
See Article on Publisher Site

Abstract

227 116 116 3 3 P. R. Burn M. S. Potts R. H. Moore A. J. Fischman H. W. Strauss Suffolk University Beacon Hill 02114 Boston Massachusetts USA Massachusetts General Hospital 02114 Massachusetts Boston USA University of New Hampshire 03824 Durham New Hampshire USA Bristol-Myers Squibb 08543 Princeton New Jersey USA Abstract To determine the pharmacokinetics of a small lipophilic molecule in vivo, the distribution and accumulation of 99m Tc-radiolabelled disofenin (diisopropylacetanilide iminodiacetic acid) were traced during 1991–1992 by scintigraphy and gamma well counting in winter flounder ( Pleuronectes americanus collected from Boston Harbor and Long Island Sound in 1992), lobsters ( Homarus americanus collected from Massachusetts Bay in 1991), and soft-shell clams ( Mya arenaria purchased in 1991). The agent was distributed throughout the bodies of lobsters within 12 s, throughout flounder within 40 s, and throughout clams within 2 min. It was concentrated most strongly by the liver of flounder, which contained 61.2±7.8% of the injected dose within 1 h of injection, and by the lobster hepatopancreas. Accumulation also occurred in the flounder kidney, lobster antennal glands, and the kidney and pericardial glands of clams. The compound was rapidly excreted from the flounder liver into the gall bladder, and from the lobster hepatopancreas into the stomach. The data suggest its excretion from the lobster antennal glands and clam kidneys. The rate of clearance of disofenin from the body varied among species: 99±2.1% of the initial dose remained in flounder sampled 16 to 24 h after injection, compared to 80.5±7% remaining in the lobster after 15 h, and 87.4±5.9% remaining in clams after 27 h. The clearance rates in flounder and lobster are considered to be minimum values because of the lack of gut activity in unfed individuals. Overall, these in vivo tracer studies establish the utility of scintigraphy for assessing the uptake and excretion of a lipid soluble compound in different taxa, and may be applicable for evaluating disease and/or environmental effects on organ function in marine animals.

Journal

Marine BiologySpringer Journals

Published: Jul 1, 1993

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