I like the MACS system also.
For our larger separations, we ended up buying the Vario MACS system,
which costs quite a bit more than the starter MACS system.
However, for separating large and for RARE cell populations, it works
great. I believe the Vario MACS is running about $5,000 or so now.
The conjugated "beads" (they really are not beads, and are MUCH
smaller than your cells) cost about $400-500.
The Vario MACS allows positive and negative selection capabilities,
and with the use of cleaveable beads, there are many uses.
We have isoalted human dendritic cells also with this system from
For CD4 cell isolation, I still recommend a FICOLL step prior to using
the MACS system. I would also pass the cells through a nylon mesh to
eliminate any cell clumps that may clog up the column.
Hope this helps!
Scientist at Mizuno.com
On Tue, 2 Sep 1997 23:15:00 -0400, "Scotty Wilcoxen"
<wilcoxen at hsc.usc.edu> wrote:
> In our lab we often need to make T cell rich populations, specifically CD4+
>and CD8+, and we use the MACS system. It gives great yields. They use an
>anti-CD4 or anti-CD8 Ab conjugated to a metallic bead. This solution is
>then passed through a column with steel shavings in it. The column sits in
>a huge magnet, and your desired fraction is either eluted out, or remains in
>the column. It is a bit slow, and VERY costly. I hope this helps.
>wilcoxen at hsc.usc.edu>>Robert Owe-Young wrote in article <33FC2D88.6B29 at cfi.unsw.edu.au>...
>>>Does anyone have a favorite method for the isolation of large numbers of
>>CD4 cells. We need to isolate CD4+ cells from apheresis specimens, and
>>our current method has gone out of production.
>>We routinely do a Ficoll step first
>>I would like to hear from anyone who has experience with MACS, R&nce.D,
>>or Baxter systems or any other similar commercially available system.
>>>>Dr Janet Mcpherson
>>>>Please reply to macpherson at angis.su.oz.au>>