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Determination of glucocorticoid receptors in human leukemias

Bestimmung von Glucocorticoid-Rezeptoren in Leukämien

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Zusammenfassung

Bei einigen steroid-sensitiven Neoplasien ist die Bestimmung von Steroid-Rezeptoren für die Voraussage einer Ansprechbarkeit auf die Hormontherapie von Bedeutung. Um die Anwendung dieser Methode auch bei Leukämien nachzuprüfen, haben wir die Glucocorticoid-Rezeptoren in Leukämiezellen von 23 Patienten und in Lymphozyten von 18 Kontrollpersonen untersucht. Die Bestimmung erfolgte nach einer Methode nach Baxter und Tomkins. Normallymphozyten haben circa 4611 spezifische Bindungsstellen pro Zelle. Der Anzahl der Steroid-Rezeptoren in den Blasten von 9 Patienten mit AML schwankten stark (Bereich: 4817–15416 Stellen/Zelle). Fünf von 13 Patienten mit CLL wurden seit Jahren mit Glucocorticoid behandelt und sprachen zur Zeit der Rezeptoren-Bestimmung auf die Therapie nicht mehr an. Die Anzahl der Bindungsstellen der Lymphozyten dieser Patienten war im Mittel niedriger (Bereich: 2047–3999), als bei den Patienten, die neu diagnostiziert worden waren (Bereich: 3734–11020). Unsere Ergebnisse weisen darauf hin, daß die Bestimmung von Steroid-Rezeptoren für die Planung einer Therapie mit Glucocorticoiden von Bedeutung sein könnte.

Summary

Determination of steroid receptors has been used to predict steroid sensitivity in various neoplasias. In an attempt to investigate its applicability in human leukemias we have studied glucocorticoid receptors in the leukemic cells from 23 patients with various hematologic neoplasias and in the lymphocytes from 18 normal donors. Specific glucocorticoid binding in intact cells was determined by a whole cell competitive binding assay. Normal lymphocytes have about 4,611 specific binding sites per cell. The blasts from 9 patients with acute myelogenous leukemias (AML) have strongly varying high levels of specific binding sites, ranging from 4,817 to 15,416 per cell. Of the 13 patients with chronic lymphocytic leukemia (CLL), 5 have received glucocorticoid treatment for years and were clinically resistant to glucocorticoid. Their lymphocytes have lower specific binding sites (range: 2,047 to 3,999) than the other CLL cases which were newly diagnosed (range: 3,734 to 11,020). Our results suggest that determination of glucocorticoid receptors might be of value in predicting clinical responsiveness in leukemias.

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Supported by the Tumorzentrum Heidelberg-Mannheim, and Karl- und Maria-Biesinger-Stiftung, Hirschhorn, F.R.G.

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Ho, A.D., Hunstein, W. & Schmid, W. Determination of glucocorticoid receptors in human leukemias. Klin Wochenschr 58, 43–45 (1980). https://doi.org/10.1007/BF01477143

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