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Modulation of hepatic sinusoidal endothelial cell function by Kupffer cells: An example of intercellular communication in the liver
Author(s) -
Deaciuc Ion V.,
Bagby Gregory J.,
Niesman Michael R.,
Skrepnik Nebojsa,
Spitzer John J.
Publication year - 1994
Publication title -
hepatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.488
H-Index - 361
eISSN - 1527-3350
pISSN - 0270-9139
DOI - 10.1002/hep.1840190227
Subject(s) - intracellular , kupffer cell , microbiology and biotechnology , function (biology) , modulation (music) , hepatic stellate cell , sinusoid , endothelial stem cell , chemistry , biology , pathology , medicine , endocrinology , biochemistry , physics , in vitro , acoustics
We tested the hypothesis that Kupffer cells modulate sinusoidal endothelial cell function in the liver. Rats were treated with Kupffer cell–depleting agents (gadolinium chloride and liposome‐encapsulated dichloromethylene diphosphonate) or with inhibitors of phospholipase A 2 or leukotriene A 4 synthase (dexamethasone and diethylcarbamazine, respectively). Hyaluronan uptake by the isolated, perfused liver was measured as an index of the functional state of the sinusoidal endothelial cell. Plasma hyaluronan concentration was also determined. Three hours after Escherichia coli lipopolysaccharide administration (100 μg/100 gm body wt, intravenously) plasma hyaluronan levels were significantly increased (280 to 320), whereas hepatic hyaluronan uptake was markedly decreased (approximately 76). Pretreatment with gadolinium chloride (0.5 mg/100 gm body wt, intravenously, 21 hr before saline solution or lipopolysaccharide administration), liposome‐encapsulated dichloromethylene diphosphonate (40 μmol/100 gm body wt, intravenously, 44 hr before saline solution or lipopolysaccharide injection), dexamethasone (40 μg/100 gm body wt, intravenously, 1 hr before saline solution or lipopolysaccharide administration) or diethylcarbamazine (repeated doses, 10 mg/100 gm body wt, intravenously, 1 hr before saline solution or lipopolysaccharide injection) counteracted the lipopolysaccharide inhibitory effect on hepatic hyaluronan uptake. With the exception of gadolinium chloride, all other agents also prevented the lipopolysaccharide‐induced increase in plasma hyaluronan concentration. Gadolinium chloride only attenuated the lipopolysaccharide effect on plasma hyaluronan level. Taken together with earlier results from our laboratory, these data indicate that: (a) Kupffer cell activation by lipopolysaccharide results in suppression of hyaluronan uptake by sinusoidal endothelial cells and (b) such modulation of endothelial cell function is likely mediated by products of the lipoxygenase pathway of arachidonate metabolism. (Hepatology 1994;19:464–470).