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Retrovirus production & media color (pH)

Retrovirus

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3 replies to this topic

#1 Byung K. Min

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Posted 20 March 2012 - 02:20 AM

Hi, all.
I have been trying to produce retroviruses by transfecting GP2 cells with lipofectamine.
According to a protocol, I should collect viruses between 48 to 72hr post transfection,
but the media turns yellow (no red at all) at around 40hr.
Strange thing was that the cell never reached the confluency.
Viruses collected in the condition worked very poorly.

I asked to many people, but they told me they never experienced that.
I don't know what's wrong and what to do...

Somebody with similar experience?
If you do, how did you solve the problem?

#2 bob1

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Posted 21 March 2012 - 12:13 PM

Have you checked your cells for contamination?

#3 Byung K. Min

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Posted 21 March 2012 - 06:51 PM

yep.
No contamination was detected.

#4 bob1

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Posted 22 March 2012 - 11:48 AM

Check your incubator for too much CO2, check that your medium was prepared properly.

It could be the transfection - do you have an untransfected control (you should always have one of these) and a transfection reagent only control? If so, have a look at those, how do they look compared to the transfections?





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