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Intravenous saline infusion in rat increases hyaluronan efflux in intestinal lymph by increasing lymph flow

Acta Physiologica Scandinavica, ISSN: 1365-201X, Vol: 147, Issue: 3, Page: 329-335
1993
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The output of hyaluronan in mesenteric lymph was studied in anaesthetized rats to allow estimation of the turnover rate. The duodenum/jejunum contained 45 ,μg of this glycosaminoglycan per g wet tissue weight. In fasted rats the concentration of hyaluronan in postnodal lymph averaged 15 μg ml and the mean efflux was 2.1 μg h, corresponding to a daily removal of 10% of the intestinal hyaluronan content. An intravenously injected bolus of 0.9% saline 4 ml 100 g followed by an infusion of the same amount per hour increased the hyaluronan concentration in lymph transiently to 22 μg ml. During the 8‐h i.v. infusion the hyaluronan output remained five times above control due to the high lymph flow. Water and hyaluronan content of the small intestine remained unaltered despite the saline load, the maintained tissue level of hyaluronan suggests an increased rate of synthesis. © 1993 Scandinavian Physiological Society

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