TSL, thermosensitive liposomes; NTSL, non-thermosensitive liposomes. |
Gd-TSL, HT |
MRI |
TSL + HT |
20 min |
Strong T1 effect visible after liposomal heating in 4/6 animals |
31 |
99mTc-lip, HT |
Planar scintigraphy |
1. 99mTc-lip + HT |
120, 240, 480 min |
2-13-fold increase in liposome accumulation w/ HT (p = 0.001) |
10 |
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2. 99mTc-lip-HT |
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Gd-NTSL, rhodamine-NTSL |
MRI |
1. Gd-NTSL vs. rhodamine-NTSL into primate brain |
∼ 20 min (?) |
Imaging of Gd-NTSL was ‘highly accurate at determining tissue distribution’ compared to histologic analysis of rhodamine-NTSL distribution |
32 |
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2. Real-time Gd-NTSL into primate brain |
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99mTc-lip, Doxil (NTSL), HT |
PET |
1. Doxil + HT |
5 h, 18 h |
HT increased intratumoral 99mTc (p = 0.0006); positive correlation between [99mTc] and [doxorubicin] in both HT and unheated groups (Pearson's = 0.92) |
11 |
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2. Doxil-HT |
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3. 99mTc-lip + HT |
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4. 99mTc-lip-HT |
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5. 99mTc-lip + Doxil + HT |
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6. 99mTc-lip + Doxil - HT |
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MnSo4-Dox liposomes, HT |
MRI |
1. NSTL + HT |
0, 5 min, 30 min, 90 min |
1. Rapid + stable peripheral enhancement |
34 |
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2. NTSL - HT |
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2. More uniform enhancement |
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3. TSL + HT |
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3. Intermediate between 1 and 2 |
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4. TSL - HT |
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4. Minimal enhancement |
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MnSo4-Dox liposomes, HT |
MRI |
1. NSTL + HT |
45 min |
Positive correlation between HPLC and histologic fluorescence estimate of [DOX] and T1-based estimate |
35 |
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2. NTSL - HT |
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3. TSL + HT |
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4. TSL - HT |
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MnSo4-Dox liposomes, HT |
MRI |
1. TSL prior to HT |
During treatment, 60 days |
1. Central drug distribution |
36 |
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2. TSL during HT |
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2. Peripheral drug distribution; highest/fastest intratumoral concentration and longest growth delay |
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3. TSL prior to and during HT |
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3. Uniform drug distribution |
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