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How are PCR and human cell culture used in molecular and cell biology?

In planning my thesis experiments on gene function, I'll be culturing HEK293 cells and running a lot of PCR. I want to move beyond seeing them as separate techniques on a syllabus. Understanding how they feed into each other in a cohesive strategy like validating genetic manipulation in cultured cells will make me a more effective experimentalist.

 

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By Emma Answered 6 months ago

In my lab, these two techniques are in constant dialogue. Here’s a classic workflow I’ve used countless times: First, we culture HEK293 cells as a model system and transfer them with a plasmid to alter gene expression. The question is, did it work? We harvest cells, isolate RNA, reverse transcribe it to cDNA, and then use quantitative PCR (qPCR) to precisely measure the change in our gene of interest. The cell culture provides the living, reacting biological context; PCR gives us the sensitive, quantitative readout from that context. One technique manipulates and maintains the system, the other interrogates its molecular state.

 

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