Lipid TOT-5
Version 1.51b7a273 · 2026-09-13
| CAS No. | Not available |
| Chemical Name | Lipid TOT-5 |
| Synonyms | Lipid TOT 5，TOT5 |
| SMILES | CCCCCCCC/C=C\CCCCCCCC(=O)OCC(COC(=O)CCCCCCC/C=C\CCCCCCCC)(COC(=O)CCCCCCC/C=C\CCCCCCCC)NC(=O)CCN1CCCCC1 |
| Formula | C66H120N2O7 |
| M.Wt | 1,052.91 |
| Purity | ELSD-HPLC>95% |
| Storage | Original product: up to 1 year under the storage conditions stated on the vial, kept tightly sealed. Stock solutions: aliquots at -20°C, generally up to one month. |
| Shipping condition | Ships from Shanghai. Pure lipid is stable during ice-pack transport. |
| Publication | Splenic B cell-targeting lipid nanoparticles for safe and effective mRNA vaccine delivery-Yuichi Suzuki etl,Journal of Controlled Release |
TOT-5, a tri-oleoyl-Tris ionizable lipid (pKa 6.2), enables splenic B cell-targeted mRNA delivery via 15% DSPC-incorporated LNPs. Its charge-neutral, hydrophobic surface minimizes hepatic ApoE uptake and enhances complement C3 adsorption, facilitating CD21/35-mediated uptake by marginal zone B cells. In vivo, intravenous 15%DSPC-LNPs showed 8-fold higher spleen-to-liver luciferase expression vs 3%DSPC, with anti-CD21/35 blocking 60% B cell uptake. Intramuscular administration induced robust OVA-specific IgG (10^5 titer) and CTL responses (3.5% tetramer+ CD8+ T cells) while reducing hepatotoxicity (ALT/AST levels ≤40 U/L vs SM-102-LNPs' 80-120 U/L). Cryo-ET confirmed stable lamellar structures (80-100 nm, ζ-potential -2 mV). This formulation achieves safe, ligand-free splenic targeting for mRNA vaccines.
Specifications shown are product-page values, not batch test results.
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