Lipid H5T5
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93-O17S is an imidazole-based synthetic lipidoid for in vivo mRNA delivery. Lipid nanoparticles (LNPs) with 93-O17S promotes both the cross-presentation of tumor antigens and the intracellular delivery of cGAMP (STING agonist).
| CAS No. | 2227008-67-3 |
| Chemical Name | 93-O17S |
| Synonyms | 93O17S, 93 O17S |
| SMILES | O=C(CCN(CCC(OCCSCCCCCCCCCCCCCC)=O)CCCN1C=NC=C1)OCCSCCCCCCCCCCCCCC |
| Formula | C44H83N3O4S2 |
| M.Wt | 782.3 |
| Purity | >95% by ELSD-HPLC |
| Storage | Pure form: −20 °C, 1 year; In solvent: −80 °C, 6 months; −20 °C, 1 month. Sealed and protected from light. |
| Shipping condition | Ships from Shanghai. Pure lipid is stable during ice-pack transport. |
| Publication | Chen J, et al. In situ cancer vaccination using lipidoid nanoparticles. Science Advances. 2021;7(19):eabf1244. |
| Component | Reported mass ratio (w/w) | Role |
|---|---|---|
| 93-O17S | 16 | Ionizable lipid |
| Cholesterol | 4 | Sterol |
| DOPE | 1 | Helper phospholipid |
| Reported ratio sum | 21 | Original ratio retained |
| Experiment | Study condition | Reported result |
|---|---|---|
| cGAMP delivery | RAW264.7 and DC2.4; 4 h | Cytosolic distribution; 85% cGAMP-Fluo encapsulation |
| OVA vaccination | Prime/boost on days 1 and 14 | ~1.8% OVA-specific CD8+ T cells with cGAMP |
| Tumor therapy | DOX day 0; 93-O17S-F/cGAMP days 1 and 5 | 2/7 mice tumor-free by day 30 |
Primary article Figs. 3, 4 and 6.
93-O17S-F changed size and zeta potential after mixing with tumor lysate and delivered model antigen to draining lymph nodes in vivo.
Protein/tumor-lysate capture experiments · Primary article Results, Fig. 5 and cited Supplementary Figs. S5-S693-O17S-F/cGAMP without DOX pretreatment produced only modest tumor inhibition; the strongest effect required prior DOX-induced antigen release.
B16F10 model · Primary article Results, Fig. 6Among mice that recovered from the primary tumor and were rechallenged, 71% were tumor-free 30 days after rechallenge.
Selected primary-tumor responders; n=7 rechallenge · Primary article Results, Fig. 6GThe product molecular weight is prefilled when available and remains editable. Confirm solvent compatibility and solubility before preparation.
Do not convert the 16:4:1 weight ratio into mol% without a separately defined calculation purpose. N/P was not reported and is not inferred.
Solvent volumes update from the molecular weight above.
| Mass | 1 mM | 5 mM | 10 mM |
|---|---|---|---|
| 10 mg | 12.7828 mL | 2.5566 mL | 1.2783 mL |
| 25 mg | 31.9570 mL | 6.3914 mL | 3.1957 mL |
| 50 mg | 63.9141 mL | 12.7828 mL | 6.3914 mL |
| 100 mg | 127.8282 mL | 25.5656 mL | 12.7828 mL |
| 250 mg | 319.5705 mL | 63.9141 mL | 31.9570 mL |
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