Abstract | UNLABELLED: METHODS: Patients received from 519 mCi to 2.1 Ci (19.2 GBq to 77.7 GBq) of holmium-166 (166Ho) complexed with a bone-seeking agent, DOTMP (1,4,7,10-tetraazacyclododecane-1,4,7,10-tetramethylene-phosphonic acid). The reproducibility of pharmacokinetics from multiple injections of 166Ho-DOTMP administered to these myeloma patients was demonstrated from blood (r2 = 0.926) and whole-body retention (r2 = 0.983), which allowed therapeutic parameters to be determined from a diagnostic study. RESULTS: Over 50% of the 166Ho-DOTMP injected dose was excreted within 2-3 hr postinjection, increasing to 75%-85% over a 24-hr period. Rapid blood clearance minimized radiation dose to nontarget tissue: less than 10% of the injected activity was retained in the blood pool at 1 hr postinjection, and less than 2% remained after 5 hr. The total radiation absorbed dose delivered to the bone marrow for the six patients ranged from 7.9 Gy to 41.4 Gy. CONCLUSION: All patients demonstrated severe bone marrow toxicity with a white blood cell (WBC) count < 1,000 cells/microliters, two patients exhibited marrow ablation (WBC count < 100 cells/microliters), and no other toxicity > or = grade 2 was observed in any of the patients.
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Authors | J E Bayouth, D J Macey, L P Kasi, J R Garlich, K McMillan, M A Dimopoulos, R E Champlin |
Journal | Journal of nuclear medicine : official publication, Society of Nuclear Medicine
(J Nucl Med)
Vol. 36
Issue 5
Pg. 730-7
(May 1995)
ISSN: 0161-5505 [Print] United States |
PMID | 7738641
(Publication Type: Clinical Trial, Clinical Trial, Phase I, Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Organometallic Compounds
- Organophosphorus Compounds
- holmium-1,4,7,10-tetraazacyclododecane-N,N',N'',N'''-tetrakis(methylenephosphonic acid)
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Topics |
- Bone Marrow
(pathology, radiation effects)
- Bone Marrow Purging
- Bone Marrow Transplantation
- Humans
- Leukocyte Count
- Multiple Myeloma
(blood, therapy)
- Organometallic Compounds
(administration & dosage, adverse effects, pharmacokinetics, therapeutic use)
- Organophosphorus Compounds
(administration & dosage, adverse effects, pharmacokinetics, therapeutic use)
- Radiation Dosage
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