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Experimental elimination of the splenic function by an intravenous injection of ethyl palmitate emulsion in Wistar rats

Experimentelle Eliminierung der Sequestrationsfunktion der Milz nach i. v. Injektion von EP-Emulsion in Wistar Ratten

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Zusammenfassung

Die Verfasser versuchten mittels Äthylpalmitat (EP) an Wistar Ratten die experimentelle Eliminierung der Sequestrationsfunktion der Milz zu demonstrieren. Nach einer i. v. Injektion von EP-Emulsion (0,35 g und 0,10 g per 100 g Körpergewicht) wurde die Clearance der51Cr-markierten und wärmebeschädigten Erythrozyten aus dem Blut in Intervallen von 24 h, 3, 10, 20 und 50 Tagen nach EP-Behandlung untersucht und deren Sequestration in der Milz und Leber verfolgt. Eine große Dosis von EP verursachte bei Tieren, vor allem nach 24 h, 3 oder 10 Tagen einen markanten Abfall der Radioaktivität in der Milz, und verlängerte signifikant die Erythrozyten-Clearance. Hinsichtlich des Umfangs sind die Veränderungen mit denen der chirurgischen Splenektomie vergleichbar. In späteren Zeitintervallen (20 und 50 Tage nach der EP-Injektion) wiesen einige Tiere teilweise Regenerierung der Sequestrationsfunktion der Milz auf, bei anderen Tieren dagegen persistierten die Milzschäden weiter. Die Veränderungen als Folge einer kleinen EP-Dosis waren ausgeprägt und hatten vorübergehenden Charakter.

Summary

Attempts were made at the experimental elimination of the sequestration function of the spleen on Wistar rats using ethyl palmitate (EP). Following an i. v. injection of EP emulsion in an amount of 0.35 g and 0.10 g/ 100 g of body weight the clearance of51Cr-labeled and heat-damaged red cells from the blood and their sequestration in the spleen and liver at 24-h, 3-, 10-, 20-, and 50-day intervals was examined. A high dose of EP caused, notably at 24 h and also after 3- and 10-day intervals, a significant decrease of radioactivity in the spleen and considerably prolonged the clearance time of the red0 cells. The extent of changes were comparable to those of surgical splenectomy. At later intervals (20 and 50 days after EP injection) some animals showed partial regeneration of the sequestration ability of the spleen; in some other animals the splenic damage was permanent. Changes induced by small doses of EP were less pronounced and of transient character.

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Abbreviations

EP:

ethyl palmitate

S.D.:

standard deviation

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Šebestík, V., Jelínek, J. Experimental elimination of the splenic function by an intravenous injection of ethyl palmitate emulsion in Wistar rats. Blut 40, 429–435 (1980). https://doi.org/10.1007/BF01029685

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