DMA4-H228
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Ionizable lipid for LNP and nucleic-acid delivery research.
CICL-1, identified in the cited study as Lipid 829 (L829), is an ionizable lipid used in targeted lipid nanoparticles for in vivo delivery of CAR mRNA to T cells. CD8-targeted L829 tLNPs preferentially engineered CD8-positive T cells in the reported models, produced rapid B-cell depletion, and controlled a humanized leukemia xenograft. In cynomolgus monkeys, anti-CD20 CAR mRNA tLNPs produced deep peripheral and tissue B-cell depletion, followed by repopulation dominated by naïve B cells; the authors described this finding as suggestive of immune reset. The supplied main article does not include Supplementary Table S1, so the complete five-lipid composition and N/P ratio are not presented as verified formulation values. All performance statements below are literature-reported study results, not product specifications or guaranteed outcomes.
| CAS No. | Not available |
| Chemical Name | CICL-1 (L829) |
| Synonyms | L-829, L 829, Capstan-lipid-CICL-1, Capstanlipid CICL1, CICL1, CICL 1, CICL-1, Lipid 829, L-829, L 829, Compound A-11, DC60860 |
| SMILES | CCCCCCCCC(=O)OCC(COC(=O)CCCCCCCC)CC(=O)OCCN(CCOC(=O)CC(COC(=O)CCCCCCCC)COC(=O)CCCCCCCC)C(=O)OCCN(C)C |
| Formula | C55H100O14N2 |
| M.Wt | 1,013.40 |
| Purity | >98% |
| 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 | Hunter TL, Bao Y, Zhang Y, et al. In vivo CAR T cell generation to treat cancer and autoimmune disease. Science. 2025;388(6753):1311-1317. |
| Component | mol% | Role |
|---|---|---|
| L829 (CICL-1) | Not reported | Ionizable lipid |
| Anti-CD8 targeting-moiety lipid conjugate (lipid identity not reported in supplied main article) | Not reported | Targeting-lipid conjugate |
| Three additional lipid components (identities not reported in supplied main article) | Not reported | Additional lipid components |
| Reported total | Not reported | Source values retained |
At 30 µg, four of five mice showed near-complete tumor clearance two days after the first dose, and all five did so three days after the second dose.
CD8-L829-tLNP-CD19; IV 30 µg; twice weekly for five doses; human PBMC plus Nalm6 xenograft · Figure 3G and main text, Science p. 1315The study reported lower liver and spleen luciferase expression with untargeted L829 LNP than with the ALC-0315 benchmark, and rapid L829 clearance from mouse liver while ALC-0315 remained elevated for at least seven days.
Luciferase mRNA and LC-MS studies; WT C57BL/6 mice · Figure 1B,C and main text, Science pp. 1311-1312Rat CD5-L829 tLNP was reported as tolerated up to 5 mg/kg without adverse observations, and a single 3 mg/kg IV dose was reported as safely administered in cynomolgus monkeys. In the repeat-dose anti-CD20 study, however, one monkey in the 1.5 mg/kg group developed a serious immune-effector-cell-associated event 72 h after the third dose and was euthanized.
Study-specific targeted L829 tLNPs; rat and cynomolgus-monkey experiments · Figure 1D,E; main text, Science pp. 1311 and 1316The product molecular weight is prefilled when available and remains editable. Confirm solvent compatibility and solubility before preparation.
Solvent volumes update from the molecular weight above.
| Mass | 1 mM | 5 mM | 10 mM |
|---|---|---|---|
| 10 mg | 9.8678 mL | 1.9736 mL | 986.78 μL |
| 25 mg | 24.6694 mL | 4.9339 mL | 2.4669 mL |
| 50 mg | 49.3389 mL | 9.8678 mL | 4.9339 mL |
| 100 mg | 98.6777 mL | 19.7355 mL | 9.8678 mL |
| 250 mg | 246.6943 mL | 49.3389 mL | 24.6694 mL |
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