Plasmid Transfection
Plasmid Transfection - Related Videos
02:44
Generation of Recombinant Adeno-Associated Virus Through Plasmid Transfection
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2026
Source: Ding, J., et al. Preparation of rAAV9 to Overexpress or Knockdown Genes in Mouse Hearts. J. Vis. Exp. (2016)This video demonstrates the production of recombinant adeno-associated virus particles through plasmid transfection in mammalian cells. It highlights the coordinated expression of Rep, Cap, and helper proteins that drive viral genome replication and capsid assembly within the nucleus.
02:22
Production of Pseudovirus Using Plasmid Transfection in Human Cells
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2026
Source: Chang, X., et al. Preparation of Pseudo-Typed H5 Avian Influenza Viruses with Calcium Phosphate Transfection Method and Measurement of Antibody Neutralizing Activity. J. Vis. Exp. (2021)This video demonstrates the production of influenza pseudoviruses in human cells using calcium phosphate-mediated plasmid transfection, enabling safe generation of single-cycle viral particles for downstream applications such as antibody neutralization assays under biosafety level 2 conditions.
05:11
Organoid Electroporation: A Method to Transfect Plasmid DNA into Gastrointestinal Organoids
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2023
This video describes the electroporation protocol for transfecting large plasmids into three-dimensional gastrointestinal organoids to prove its universal functionality in different entities, namely pancreatic ductal adenocarcinoma (PDAC), colorectal cancer (CRC), cholangiocarcinoma (CCC), and gastric cancer (GC) organoids.
03:23
Nucleofection of Parasite Forms: An Electroporation-Based Transfection Method to Deliver Fluorescent Protein Encoding-Plasmids Into Sporozoite Nucleus
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2025
In this video, we describe nucleofection, an electroporation-based transfection procedure to deliver fluorescent reporter protein-encoding plasmid DNA into sporozoite form of the chicken Eimeria parasite.
08:16
Plasmid Purification
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2023
Plasmid purification is a technique used to isolate and purify plasmid DNA from genomic DNA, proteins, ribosomes, and the bacterial cell wall. A plasmid is a small, circular, double-stranded DNA that is used as a carrier of specific DNA molecules. When introduced into a host organism via transformation, a plasmid will be replicated, creating numerous copies of the DNA fragment under study. In this video, a step-by-step generalized procedure is described for how to perform plasmid purification.
FAQs
Delivery systems temporarily alter the barrier posed by the cell membrane, allowing plasmid DNA to enter eukaryotic cells. Lipid-based reagents, calcium phosphate, and electroporation represent different ways to promote this transfer. After entry, the plasmid must reach the nucleus, where cellular machinery can read its encoded sequence and drive the intended protein production or gene-activity change.
Plasmid design determines which selected protein or gene-activity change the experiment can produce. The DNA may support transient expression, or integration and selection may be used when longer-term expression is needed. Consequently, the construct must match the biological question: short-lived expression can suit an immediate study, whereas sustained expression supports longer-term investigation.
Transfection efficiency is influenced by plasmid design, delivery conditions, and the target cell type. These variables also affect cellular effects, so a condition that introduces DNA effectively may not produce the same biological response in another cell population. Evaluating both DNA delivery and cell behavior is therefore important when interpreting protein production or altered gene activity.
A basic workflow begins by choosing an engineered plasmid that encodes the protein or gene-activity change of interest, then pairing it with a delivery approach such as a lipid-based reagent, calcium phosphate, or electroporation. Following cellular uptake and nuclear access, the experiment assesses the resulting protein production or gene-activity change, while considering whether expression is transient or longer term.
Researchers apply Plasmid Transfection to investigate gene function, produce recombinant proteins, model disease, screen drugs, and evaluate gene-therapy strategies. These uses differ in their immediate goal, but each relies on changing cellular gene activity or producing a selected protein in an experimental setting. The method therefore connects molecular manipulation with medically relevant research questions.
Medical applications require attention to both intended molecular output and cellular response. A transfected system may be used to produce a recombinant protein, model disease, screen drugs, or evaluate a gene-therapy strategy, but outcomes depend on plasmid design, delivery conditions, and target cell type. These variables help determine how confidently results can be connected to the medical question.