YALEPIC^® DNA/RNA Universal Transfection Reagent (LFDR3)

Yes. LFDR3 is a true DNA/RNA universal transfection reagent. The same formulation can efficiently transfect plasmid DNA, siRNA, mRNA, and miRNA mimetics. There is no need to purchase separate specialized reagents for different types of nucleic acids, making it particularly suitable for laboratories that need to conduct both gene overexpression and gene silencing research, significantly reducing reagent procurement costs and management complexity.

Yes. LFDR3 was designed from the outset with co-transfection scenarios in mind. By optimizing the formation conditions of transfection complexes, users can mix plasmid DNA and siRNA at a defined ratio and co-incubate with LFDR3 reagent to form co-transfection complexes containing both types of nucleic acids, enabling simultaneous overexpression and gene silencing in the same cells. For initial use, a 1:1 DNA:siRNA mass ratio is recommended for optimization.

LFDR3’s cytotoxicity is significantly lower than traditional liposome-based transfection reagents. Traditional cationic liposome transfection reagents at high concentrations easily cause cell membrane damage and endoplasmic reticulum stress, leading to cell death. LFDR3 uses an innovative low-toxicity polymer material formulation. Cell viability can be maintained above 90% at 24-48 hours post-transfection (varying by cell type). This is particularly important for the reliability of experimental results with sensitive cell lines (such as primary neurons, immune cells, and stem cells).

In addition to standard adherent cells, LFDR3 performs well in various hard-to-transfect cells, including suspension cells (Jurkat, K562), primary cells (primary neurons, primary fibroblasts), stem cells (mesenchymal stem cells MSC, embryonic stem cells ESC), and some tumor cell lines sensitive to chemical reagents. Transfection efficiency varies between cell lines; a pilot experiment to optimize transfection conditions is recommended before first use.

Yes. LFDR3 can effectively transfect suspension cell lines such as Jurkat (human T-cell leukemia cells) and K562 (human chronic myeloid leukemia cells). For suspension cell transfection: select cells in logarithmic growth phase, adjust cell density to approximately 5×10^5-1×10^6 cells/mL, add the transfection complex directly to the cell suspension after formation, and after 4-6 hours of incubation, optionally replace with fresh culture medium based on experimental requirements.

No. One of LFDR3’s key operational advantages is its excellent serum compatibility. After transfection complex formation, it can be added directly to complete culture medium containing 10% fetal bovine serum (FBS) for transfection. There is no need to wash cells with serum-free medium before transfection, nor to change the medium during transfection. This feature greatly simplifies the workflow, reduces operational errors and contamination risks, and is particularly suitable for high-throughput transfection screening experiments.

For most cell lines, the recommended ratio of DNA amount to LFDR3 reagent volume is 1:2 to 1:3 (i.e., 1 microgram DNA corresponds to 2-3 microL LFDR3 reagent). For initial use, gradient ratios of 1:2, 1:2.5, and 1:3 are recommended for pilot optimization. For sensitive cells or hard-to-transfect cells, it may be necessary to reduce the reagent amount to minimize cytotoxicity. For specific optimization protocols, please refer to the product manual or contact YALI Biotech technical support.

The LFDR3 transfection workflow is very streamlined, taking approximately 30 minutes to complete complex preparation and addition: (1) Dilute DNA/RNA (about 5 minutes); (2) Add LFDR3 reagent (about 5 minutes); (3) Incubate complex at room temperature (10-15 minutes); (4) Add complex directly to cell culture plate (about 5 minutes). No medium change is needed after transfection. Downstream operations can be performed 4-6 hours post-transfection based on experimental requirements. Compared to transfection reagents that require medium changes, a single experiment can save 30-60 minutes.

LFDR3 should be stored at 2-8 degrees C protected from light. Freezing is strictly prohibited (freezing causes reagent structural damage, severely affecting transfection performance). The shelf life is 24 months when unopened. After opening, continue storing at 2-8 degrees C, tighten the cap to prevent evaporation and contamination, and use within the shelf life. For larger experimental volumes, consider aliquoting to reduce repeated cap opening. Mix thoroughly before each use, avoiding vigorous shaking.

Suboptimal transfection results are typically related to the following factors: (1) Cell condition – cell density should be at 70-90% confluence in logarithmic growth phase; (2) Nucleic acid quality – ensure DNA/RNA purity is high, endotoxin-free, with accurate concentration; (3) Ratio optimization – the DNA:reagent ratio may need adjustment based on cell type; (4) Storage conditions – confirm the reagent has not undergone repeated freeze-thaw or prolonged exposure to room temperature. It is recommended to investigate systematically from the directions mentioned above. For more specific questions, contact YALI Biotech technical support for personalized experimental advice.