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Instruction Manual for GeticoFect 293 Transfection Reagent1. Product DescriptionGeticoFect 293 Transfection Reagent is a specialized transfection reagent designed for highly effici
Instruction Manual for GeticoFect 293 Transfection Reagent1. Product DescriptionGeticoFect 293 Transfection Reagent is a specialized transfection reagent designed for highly effici
Catalog Number | Specification | Price (CNY) |
131301 | 0.75ml | 2,250.00 |
131302 | 1.5ml | 4,000.00 |
131303 | 15ml | 36,000.00 |
In the fields of modern biotechnology and biomedical research, eukaryotic cell gene transfection technology is a key link for exploring gene functions, conducting drug research and development, and producing biological products. Among them, the efficient and safe delivery of DNA into cells is crucial for achieving gene expression and subsequent research work. As a unique nano-formulated product, GeticoFect™ 293 Transfection Reagent demonstrates excellent performance and broad application prospects in this field.
GeticoFect™ 293 Transfection Reagent adopts a unique nano-formulation technology. Nanomaterials possess special physical and chemical properties; their tiny particle size and large specific surface area enable the reagent to form stable and highly efficient complexes with DNA molecules. These complexes act like precise transport carriers, which can effectively protect DNA from nuclease degradation while enhancing its affinity with cell membranes, thereby achieving more efficient intracellular delivery.
This reagent is widely used for transfecting DNA into various eukaryotic cells, and exhibits outstanding performance especially in the transfection of 293 suspension cells. 293 suspension cells, such as 293-F cells, are common cell models in biopharmaceuticals and genetic research, featuring fast growth rate and easy large-scale culture. GeticoFect™ 293 Transfection Reagent has been carefully optimized to perfectly adapt to the biological characteristics of 293 suspension cells, providing an efficient DNA transfection solution for them. Meanwhile, this reagent can also be used in conjunction with the 293 expression system to further promote the expression of exogenous genes in cells, offering strong support for protein production and research.
GeticoFect™ 293 Transfection Reagent achieves extremely high transfection efficiency for 293 suspension cells. Its unique nano-formulation can enhance the interaction between DNA and cells, allowing more DNA molecules to enter the cell interior and achieve effective expression within the cells. In practical applications, a large amount of experimental data shows that when using this reagent for 293 suspension cell transfection, the transfection efficiency can reach a satisfactory level, providing sufficient guarantee for subsequent gene function research and protein production.
In addition, this reagent not only applies to 293 suspension cells but also achieves good transfection effects on adherent 293 cells. This means that regardless of the culture method adopted, researchers can use GeticoFect™ 293 Transfection Reagent to achieve efficient DNA transfection, greatly improving the flexibility and applicability of experiments.
The defined composition of GeticoFect™ 293 Transfection Reagent is one of its important advantages. In scientific experiments, the clarity of reagent composition is crucial for the stability and repeatability of experimental results. The defined composition allows researchers to accurately understand the mechanism of action of the reagent and its potential impacts, thereby better controlling experimental conditions and reducing experimental errors. At the same time, the defined composition also helps to ensure the quality stability of the reagent, enabling each batch of the reagent to provide consistent transfection effects and offering reliable guarantee for the smooth progress of scientific research work.
Traditional transfection reagents often require cumbersome operations such as removing complexes, changing or adding medium after transfection during use. These operations not only increase the time and workload of experiments but also may cause additional damage to cells, affecting transfection efficiency and cell growth status. However, GeticoFect™ 293 Transfection Reagent eliminates the need for these operations, greatly simplifying the experimental process.
During the transfection process, the complexes formed by this reagent and DNA can stably exist in the cell medium without causing obvious toxic effects on cells. Therefore, there is no need to remove the complexes or change/add medium after transfection, and cells can continue to grow and express exogenous genes in the original culture environment. This not only saves experimental time and costs but also reduces the impact of human factors on experimental results, improving the success rate and reliability of experiments.
In conclusion, with its unique nano-formulation, high transfection efficiency, defined composition, and simplified operation process, GeticoFect™ 293 Transfection Reagent has become an ideal choice for transfecting DNA into 293 cells (including suspension and adherent cells). Whether exploring the mysteries of genes in the field of basic research or conducting large-scale protein production in the biopharmaceutical industry, this reagent will provide strong support for researchers and promote the continuous development of biotechnology and biomedical research.
Q: What is the design principle and unique advantage of GeticoFect 293 Transfection Reagent?
A: GeticoFect 293 Transfection Reagent is a unique nano-formulated reagent. Developed based on nanotechnology, it can form stable complexes with DNA and effectively protect DNA from nuclease degradation. Compared with other similar reagents, its advantage lies in its efficient transfection ability for 293 cells, which is especially suitable for transfecting various 293 cell lines, such as common 293T and 293F cells. Moreover, it has relatively low cytotoxicity, providing a more reliable cellular basis for subsequent experiments.
Q: Is this reagent suitable for all types of 293 cells, including adherent and suspension 293 cells?
A: Yes, GeticoFect 293 Transfection Reagent is widely applicable to various eukaryotic cells and has been specially optimized for 293 cells. Whether it is adherent-growing 293 cell lines or suspension-cultured 293 cells (such as 293F suspension cells), it can exhibit good transfection effects, meeting the needs of different experiments for 293 cell transfection.
Q: What may cause low transfection efficiency and how to solve it?
A: Low transfection efficiency may be caused by multiple factors, as detailed below:
• Poor cell status: Use 293 cells with good viability and passage number less than 15. Excessive passage times may reduce the transfection ability of cells. Seed the cells one day before transfection to ensure that the cell confluency reaches 60%-70% during transfection (e.g., inoculate approximately 5×10^5 cells per well in a 6-well plate). If the cell density is too high (exceeding 80% confluency), the mutual contact inhibition between cells is not conducive to the entry of transfection complexes into cells; if the density is too low (below 50% confluency), the cells have relatively insufficient nutrients and unstable status, which will also affect transfection.
• Nucleic acid quality issues: Ensure that the DNA purity (OD260/280) is between 1.8 and 2.0. Insufficient purity or degradation will lead to low transfection efficiency. If the DNA contains impurities such as proteins and RNA, or the DNA itself is broken and degraded, it will affect the formation of effective complexes with the transfection reagent. Use high-quality nucleic acid extraction kits (such as Qiagen's EndoFree Plasmid Kits) to extract DNA, use enzyme-free consumables throughout the process, and detect the integrity of DNA by agarose gel electrophoresis after extraction.
• Unoptimized transfection conditions: Conduct preliminary experiments to optimize the ratio of transfection reagent to DNA (e.g., 1:1, 2:1, 3:1, μg DNA:μL transfection reagent). The optimal transfection conditions required for different experimental purposes (such as different transfected plasmid sizes and expressed proteins) are different. Incubate at room temperature for 15-30 minutes as required by the instruction manual to form stable complexes; improper incubation time will also affect transfection efficiency.
• Inappropriate transfection method or reagent: Select an appropriate transfection method (such as electroporation) according to the cell type and specific conditions. If the reagent is inappropriate, try other reagents specially designed for 293 cells (such as 293fectin and ExpiFectamine 293) and conduct comparative experiments. Although GeticoFect 293 is specially designed for 293 cells, 293 cells from different sources or with different treatment methods may have slight differences and may respond differently to this reagent.
Q: What should I do if the transfection efficiency is unstable and the repeatability is poor?
A: The instability of transfection efficiency and poor repeatability can be solved from the following aspects:
• Unstable transfection parameters: Strictly control parameters such as cell density, transfection reagent dosage, and incubation time. Use precise tools (such as multi-channel pipettes) to add transfection reagents and DNA, and record the operation parameters of each step in detail in the experimental records to facilitate subsequent analysis and adjustment. Fluctuations in cell seeding density exceeding 10% in different batches of experiments or differences in incubation time after mixing the transfection reagent and DNA of more than 5 minutes may lead to poor transfection repeatability.
• Unstable cell status: Thaw cells regularly (every 2-3 months) and use cells with fewer passage times. You can select cell sublines with higher and more stable transfection efficiency (e.g., 293T cell line has relatively more stable transfection efficiency in some cases). For 293 cells with different passage times, the expression of surface receptors and metabolic activity may change, thereby affecting the transfection effect.
• Experimental environment factors: Use air conditioners, humidifiers, etc., to control the laboratory temperature at 22-25℃ and humidity at 40%-60%. Conduct transfection operations in a clean bench to reduce interference. Changes in conditions such as temperature and humidity in the experimental environment may affect the transfection effect; for example, temperature will affect the stability of transfection complexes and the physiological state of cells.
Q: What causes high cytotoxicity and how to solve it?
A: The causes of high cytotoxicity and corresponding solutions are as follows:
• Excessively long incubation time of transfection solution: According to the instructions, the incubation time after mixing GeticoFect 293 Transfection Reagent with DNA should not exceed 30 minutes; avoid exceeding the time limit. As the incubation time increases, the complexes may aggregate or change their structure, increasing damage to cells.
• Low cell seeding density: Appropriately increase the density (e.g., increase the number of cells seeded per well in a 6-well plate from 4×10^5 to 6×10^5) to enhance the tolerance of cells to the transfection reagent. When the number of cells is small, the ratio of transfection complexes to cells in the unit volume increases, which enhances the stimulation to cells and leads to increased cytotoxicity.
• High ratio of transfection reagent to DNA: Optimize the ratio through preliminary experiments (e.g., start with 2:1 (μg DNA:μL transfection reagent)) to find the optimal ratio that balances transfection efficiency and low toxicity. Excessive transfection reagent may damage the cell membrane structure, affect the normal metabolism of cells, and lead to increased cytotoxicity.
• Medium composition issues: Prepare transfection complexes using serum-free DMEM medium, and avoid high concentrations of phosphate, chondroitin sulfate, etc. When adding antibiotics, select types with little impact and do not use excessively high concentrations. Using medium containing serum or certain inhibitors when preparing transfection complexes may increase cytotoxicity. Proteins and other components in serum may interact with the transfection reagent, interfering with the formation of complexes, and certain inhibitors may cause additional damage to cells.
Q: What should I do if precipitation occurs in the transfection complex?
A: Precipitation in the transfection complex may be caused by the following reasons, with corresponding solutions:
• Presence of excess EDTA: Dissolve DNA in pure water or EDTA-free buffer (such as Tris-HCl buffer pH 8.0), and remove excess EDTA by methods such as ethanol precipitation after extraction. If DNA is dissolved in TE buffer containing excess EDTA, EDTA will react with the cationic transfection reagent, resulting in precipitation, which interferes with the combination of the transfection reagent and DNA and destroys the formation of complexes.
• Excessive dosage of transfection reagent or nucleic acid: Use the recommended dosage according to the standard procedure, strictly follow the ratio optimized in the preliminary experiment (e.g., 2-3μL of transfection reagent per μg of DNA), and do not increase the dosage arbitrarily. During the formation of transfection complexes, excessive transfection reagent or DNA will cause precipitation. When the ratio exceeds the appropriate range, the transfection reagent and nucleic acid cannot combine effectively, and the excess components will aggregate and precipitate.
Q: How should GeticoFect 293 Transfection Reagent be stored, and what is its shelf life?
A: This reagent should be stored in a 4℃ refrigerator; freezing should be avoided as it may damage the structure of components such as liposomes. If it is accidentally frozen, observe whether there is stratification or turbidity after thawing; if there is any abnormality, it is not recommended to use it. Under proper storage conditions, the shelf life is [X] months. When approaching the expiration date, it is recommended to conduct a preliminary experiment to detect the transfection efficiency; if it decreases significantly, replace it in time.
Q: What precautions should be taken during the operation?
A: The following precautions should be noted during the operation:
• Mixing operation: When mixing the transfection reagent and DNA, gently pipette (10-15 times) or invert to mix; avoid violent vortexing. Violent vortexing will damage the structure of the transfection reagent and affect the formation of complexes.
• Adding sequence: First dilute the DNA in serum-free medium, then dilute the transfection reagent. After incubating for 5 minutes, slowly add the diluted DNA to the transfection reagent instead of the reverse order; this helps to form stable transfection complexes.
• Cell culture environment: Ensure that the cells are in a good state before transfection, the medium is fresh (pH 7.2-7.4), the CO₂ concentration in the incubator is stably maintained at 5%-6%, and the temperature is 37℃. A good cell culture environment is conducive to improving the success rate of transfection.
• Avoid interfering substances: Contaminants may kill cells, and salts may interfere with the complexation, thereby reducing transfection efficiency. Do not add selective antibiotics to the medium during transfection, as this may reduce transfection efficiency. If it is necessary to add antibiotics to the medium, select types with little impact on transfection and do not use excessively high concentrations.
