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Title: Bone marrow adsorbed dose of rhenium-186-HEDP and the relationship with decreased platelet counts

Rhenium-186(Sn)-1,1-hydroxyethylidene diphosphonate ({sup 186}Re-HEDP) has been used for palliation of metastatic bone pain. The purpose of this study was to find a relationship between the bone marrow absorbed dose and the toxicity, expressed as the percentage decrease in the peripheral blood platelet count. The bone marrow absorbed dose was calculated according to the MIRD model using data obtained from ten treatments of patients suffering from metastatic prostate cancer; noninvasive and pharmacokinetic method were used. The bone marrow doses were related to toxicity using the pharmacodynamic sigmoid E{sub max} model. The mean bone marrow absorbed doses using the noninvasive and pharmacokinetic methods were in a close range to each other (1.07 mGy/MBq and 1.02 mGy/MBq, respectively). There was a good relationship between the toxicity and the bone marrow absorbed dose (r = 0.80). Furthermore, the EDrm{sub 50} (i.e., the bone marrow absorbed dose producing a 50% platelet decrease) to bone marrow for {sup 186}Re-HEDP was on the order of 2 Gy. Although the function of normal bone marrow is affected by metastases in patients with metastatic bone disease, the MIRD model can be used to relate toxicity to the bone marrow absorbed dose after a therapeutic dosage of {sup 186}Re-HEDP. 33more » refs., 1 fig., 1 tab.« less
Authors:
; ;  [1]
  1. Univ. Hospital Utrecht (Netherlands) [and others
Publication Date:
OSTI Identifier:
240982
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Nuclear Medicine; Journal Volume: 37; Journal Issue: 1; Other Information: PBD: Jan 1996
Country of Publication:
United States
Language:
English
Subject:
56 BIOLOGY AND MEDICINE, APPLIED STUDIES; 55 BIOLOGY AND MEDICINE, BASIC STUDIES; BONE MARROW; METASTASES; RHENIUM 186; TOXICITY; ADSORPTION; BLOOD PLATELETS; BIOLOGICAL RADIATION EFFECTS; MATHEMATICAL MODELS; PROSTATE; NEOPLASMS; THERAPY; RADIATION DOSES; PATIENTS