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lydialing

Member Since 05 Sep 2009
Offline Last Active Oct 19 2012 01:32 AM
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Posts I've Made

In Topic: [Question] How to remove cell debris stuck on the attached cells in primary card

11 August 2012 - 07:42 AM

View Postleelee, on 09 August 2012 - 07:18 PM, said:

You could use a P200 and suck the clumps away individually Posted Image
In addition to the larger clump, many are singles cells that instead of adhere to the well but landed on other cells and stick there.  They can be seen only under a microscope.

In Topic: [Question] how to make primary-cultured cells evenly distributed?

11 August 2012 - 07:28 AM

Thanks for your attached file, bob1. Since this unevenly distribution is only seen in cardiomyocyte culture but not in my other cell cultures in the same incubator, I feel it may not be due to the mechanic vibration. I attached a sketch of the uneven cell seeding I encountered, trying to show the two problems when using a 4-chamber slide, tangled cells in patches (or maybe not digested completely? How do I know the digestion is just enough?)  most observed in the middle of the chamber, and cells landed heavily around the well ( Was the way I shake the chamber slide wrong? It seems hard to handle containers with small wells, such as 24 well plates.)
Leelee, I use an intelli-mixer to rotate the tissuses at the speed of 4 RPM. After filtered the cells, however, I didn’t do so many times of pipetting as you said. I’ll pay attention to this next time and see if it helps, thanks.
And thanks you all, dear forum fellows. Posted Image

In Topic: [Question] how to make primary-cultured cells evenly distributed?

09 August 2012 - 01:08 AM

Dear all,

Thank you for your reply and suggestions.
I feel there’s a need to describe my question more clearly.
I’m doing primary cardiomyocyte culture using either embryos or neonates. The wells or chambers are coated with rat tail collagen I. The collagenase digestion is about 35 min but no less than 30min and no longer than 40 min at warm room for somehow the cell survival rate is low if the digestion time is out of the range. (Any indicators to show that the digestion is just good enough/ complete and not over-digested?) When seeding, I was pipetting in the middle of the chamber to disperse the cells and gentle shake back and forth, but the cells ended up to form a line in the middle of the chamber and around the chamber.

The cells attach well and they can beat so the coating is ok I think.
I attached 2 pictures for your reference.

Any idea I can do to get cell distribution more even and in a way that the outline of each cell is easier to tell? Thank you.

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