VIROMER BLUE and GREEN

Transcription

1 VIROMER BLUE and GREEN In vitro sirna/mirna Standard Transfection PRODUCT INFORMATION... 2 GENERAL... 2 BLUE OR GREEN?... 3 PROTOCOL GUIDELINES... 4 GENERAL REMARKS... 4 CELL CULTURE AND PLATING... 4 INITIAL OPTIMIZATION... 5 TRANSFECTION PROTOCOL (SINGLE WELL)... 6 DOSE RESPONSE CURVES... 7 TROUBLESHOOTING / MINIMIZING BACKGROUND... 8 TECHNICAL SUPPORT AND ORDERS... 9 Viromer BLUE and GREEN Manual 04/2015 1

2 PRODUCT INFORMATION General Technology: Viromer are polymeric transfection reagents of chemical nature taking advantage of a viral membrane fusion mechanism (hence their name). The membrane-like character is provided by alkyl moieties in combination with long chain fatty acids. During endocytosis, Viromer will become exposed to an acidic environment. The low ph renders the fatty acid moieties uncharged and hydrophobic, a switch that facilitates membrane crossing. This Active Endosome Escape technology maximizes transfection efficiency and reduces off-target effects. Key Benefits: Active Escape Technology Zero Charge Stable Particles Lipid free Reverse Transfection Efficient for both adherent and suspension cells Compatible with serum or antibiotics. Gentle on cells Reproducible results Reliable results, no interference with cell s lipid metabolism Ready for High-throughput Screening (HTS) Content: Each package contains - 500µl of Viromer BLUE or GREEN. This amount is sufficient for at least transfections in the 24-well plate format. The number of transfections that can be performed will depend on the cell type, the optimal transfection scale and the culture plate format (see Table on Page 6). Test samples of Viromer contain 50µl. - Start Positive Controls (optional): the controls are manufactured at Lipocalyx GmbH according to the protocol given in the following sections and lyophilized for stability. It comprises (i) a GAPDH-siRNA and, (ii) a non-targeted sirna labeled with Cy3, both complexed to Viromer. Reconstituted each one yields 153µl of Start Positive Controls. Storage: Viromer should be stored between 2-8 C and are stable for 2 years. Please always tighten the screw caps vial to avoid evaporation, contamination or uptake of CO 2. Reagent use: Viromer BLUE and GREEN are optimized for the transfection of sirna and mirna. For single-stranded antagomirs or antisense oligonucleotides, please use Viromer BLACK, a premium Viromer BLUE and GREEN Manual 04/2015 2

3 reagent also suitable for extremely challenging cells. For the transfection of plasmid DNA, please refer to Viromer RED or YELLOW. Product use limitations: This product is intended for research use only; it must not be used for therapeutic, veterinary or diagnostic applications. The purchase of this product implies a limited, nontransferable right to the purchaser to use this product, or parts from this product, only for its internal research. All further commercial applications of Lipocalyx products require a license from Lipocalyx GmbH. BLUE or GREEN? BLUE is a versatile standard with broad support in the user data. GREEN is more selective for particular cells. Viromer BLUE and GREEN are highly-effective on a wide range of standard and hard-to-transfect cells including suspension cells, stem cells and primary cells without affecting cellular and lipid metabolism. Please refer to our selection guide at If a cell type is not listed, parallel tests with both Viromer BLUE and GREEN are recommended. What is different? Viromer BLUE and GREEN differ in their surface and backbone chemistry. Why testing more than one? While we have optimized the Active Endosome Escape Technology, Viromer have no built-in cell specific motifs. Hence their uptake may differ between cell types. Viromer BLUE and GREEN Manual 04/2015 3

4 PROTOCOL GUIDELINES General Remarks Protocol steps: - Growing and plating of cells - Initial Optimization/Transfection (preparation 10 min, incubation 15 min) - Final incubation before analysis (1-3 days) Conditions of use and required materials: Warm all reagents to room temperature. The complexation and transfection of Viromer should be done under a sterile workbench using sterile, RNAse free and apyrogenic tips and tubes. Complexes should be prepared freshly. Opti-MEM and nuclease-free sterile water are required to make dilutions and are not provided with the product. Media: Cells are cultivated in complete medium, which optionally can be changed before transfection. Viromer are fully compatible with cell culture media, sera or antibiotics, so no dilutions or washings are required. Simply keep the Viromer on the cells for the entire experiment. Cell Culture and Plating Grow cells to about 65% confluency. Use the volume of complete medium as mentioned in the table below. Optional: Change the medium before transfection. Recommended starting conditions for common cell culture plates are: Multiwell plate type Adherent cells Cells seeded per well 12,000 30,000 60, , ,000 Range * ±3,000 ±10,000 ±20,000 ±40,000 ±80,000 Suspension cells Cells seeded per well 48, , , ,000 1,000,000 Range * ±12,000 ±40,000 ±80,000 ±160,000 ±320,000 Medium per well (ml) *In reverse transfection protocols, cell numbers should be on the higher end. Viromer BLUE and GREEN Manual 04/2015 4

5 NOTE: Viromer can be used in forward or reverse transfection. In forward transfection protocol, cells are seeded the day before transfection and the sirna/mirna:viromer complexes are freshly prepared at the transfection day. Initial Optimization Volumes given here support 24 or 96 well format. For 6 well, scale 4 fold. 1. Dilute your sirna/mirna to 0.28 μm using Opti-MEM. For suspension cells, use 0.73 μm. Provide a volume of 150 μl. 2. Place 3 μl Viromer onto the wall of a fresh tube. 3. Pipette the 150 μl of diluted sirna/mirna from step 1 directly onto the Viromer droplet. Always add diluted sirna/mirna to Viromer, not vice versa! 4. Carefully pipette up and down. 5. Incubate for about 15 min at room temperature. 6. Add sirna/mirna:viromer complexes from step 5 to your cells. Titrate as per the table below to identify optimal conditions. OPTIONAL: For preparation of the Start Positive Controls, rehydrate them with 153 μl of nucleasefree water and use them in step 6. Volume of complexes to add per well (μl) sirna on cells [nm] Transfection 96 well 24 well 6 well Adherent Suspension Scale Monitor sirna/mirna effects h after transfection. Viromer BLUE and GREEN Manual 04/2015 5

6 Transfection Protocol (Single Well) During the Initial Optimization, a Transfer Volume of sirna/mirna:viromer complexes and a Transfection Scale were identified. Please proceed with these specific settings. The table below is a protocol using the 1.0 Transfection Scale. Please adjust all volumes according to the optimal transfection scale. 1. Start with diluting sirna/mirna to 0.28 µm in Opti-MEM (0.73 µm for suspension cells) 96 well 24 well 6 well my protocol 2. Viromer (μl) sirna/mirna in Opti-MEM (μl) Always add diluted sirna/mirna to Viromer, not vice versa! 4. Carefully pipette up and down 5. Allow complexation for about 15 min at room temperature 6. Transfer sirna/mirna:viromer complexes to the cells Transfer volume (μl) Monitor sirna/mirna effects h after transfection. Viromer BLUE and GREEN Manual 04/2015 6

7 Dose Response Curves As a final step in the optimization, the sirna/mirna concentration should be limited to the amount necessary to obtain a clear phenotype with maximum separation from any response to a control sirna/mirna (e.g. substantial knock-down). In dose response experiments, always use the amount of Viromer previously optimized and only vary the sirna/mirna concentration. The following is a sample protocol for adherent cells using 25nM sirna/mirna in the Initial Optimization step (1.0 Transfection Scale). sirna in nm Dilute sirna/mirna in Opti-MEM to μm Use target and control sirna/mirna Add 50 μl of diluted sirna/mirna from step 1 to 1-μl of Viromer 3 24-well plates: Transfect the cells using a transfer volume of 50-μl 96-well plates: Transfect the cells using a transfer volume of 10-μl 4 Incubate and analyze knock-down Viromer BLUE and GREEN Manual 04/2015 7

8 Troubleshooting / Minimizing Background The following steps are recommended for troubleshooting: 1. If transfection was successful but slightly toxic Change the medium 4h after transfection. 2. If there is still toxicity Try a different sirna/mirna. Keep in mind that even non-target control sequences may create background. 3. If there is still no signal Increase the incubation time before the analysis of the targeted mrna or protein. The suggested time point of hours is commonly accepted, but the half-life of a specific mrna or protein may be much longer. Parameters to adjust for minimizing background: Cell density: Test several seeding densities of the cells depending on growth rate and duration of the experiment. For adherent cells, target about 80% confluency at the time of knock-down analysis. In case of little to no effects on suspension cells, we recommend to increase the ratio [concentration of sirna:viromer complex] / [cell density]; either by reducing the cell density or by increasing the concentration of the sirna:viromer complex. Type of sirna: sirna designs have seen major updates to improve the specificity and reduce immunogenicity. We recommend using sirna pools and chemically modified sirnas. If immunogenicity is a concern, monitor levels of central genes coding for essential proteins, such as OAS1. For additional recommendations, please visit our support pages at (incl. updated FAQs) or contact us! Viromer BLUE and GREEN Manual 04/2015 8

9 TECHNICAL SUPPORT and ORDERS Technical Support Dr. Christian Reinsch Info & Customer Service Bettina Weber Dr. Olivia Zabel Dr. Sandra Lagauzère Mail Orders FAX Orders Webshop Lipocalyx GmbH Weinbergweg Halle Germany Viromer BLUE and GREEN Manual 04/2015 9