دورية أكاديمية
Quantitative MRI reveals heterogeneous impacts of treatment on diseased bone marrow in a mouse model of myelofibrosis.
| العنوان: | Quantitative MRI reveals heterogeneous impacts of treatment on diseased bone marrow in a mouse model of myelofibrosis. |
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| المؤلفون: | Robison, Tanner H., Lee, Winston, Luker, Kathryn E., Pettit, Kristen, Talpaz, Moshe, Chenevert, Thomas L., Ross, Brian D., Luker, Gary D. |
| المصدر: | Magnetic Resonance in Medicine; Jun2024, Vol. 91 Issue 6, p2568-2578, 11p |
| مصطلحات موضوعية: | MYELOFIBROSIS, BONE marrow, BONE marrow diseases, LABORATORY mice, ANIMAL disease models, MAGNETIC resonance imaging |
| مستخلص: | Purpose: Analyzing bone marrow in the hematologic cancermyelofibrosis requires endpoint histology in mouse models and bone marrow biopsies in patients. These methods hinder the ability tomonitor therapy over time. Preclinical studies typically begin treatment before mice develop myelofibrosis, unlike patients who begin therapy only after onset of disease. Using clinically relevant, quantitative MRI metrics allowed us to evaluate treatment in mice with established myelofibrosis. Methods: We used chemical shift-encoded fat imaging, DWI, and magnetization transfer sequences to quantify bone marrow fat, cellularity, and macromolecular components in a mouse model of myelofibrosis. We monitored spleen volume, the established imaging marker for treatment, with anatomic MRI. After confirming bone marrow disease by MRI, we randomized mice to treatment with an approved drug (ruxolitinib or fedratinib) or an investigational agent, navitoclax, for 33 days. We measured the effects of therapy over time with bone marrow and spleen MRI. Results: All treatments produced heterogeneous responses with improvements in bone marrow evident in subsets of individual mice in all treatment groups. Reductions in spleen volume commonly occurred without corresponding improvement in bone marrow. MRI revealed patterns associated with effective and ineffective responses to treatment in bone marrow and identified regional variations in efficacy within a bone. Conclusions: Quantitative MRI revealed modest, heterogeneous improvements in bone marrow disease when treating mice with established myelofibrosis. These results emphasize the value of bone marrow MRI to assess treatment in preclinical models and the potential to advance clinical trials for patients. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: | Complementary Index |
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