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Background:

There are many methods to extract proteins form human tissues out there. The majority of them use an extraction buffer containing variable concentrations of detergents and protease inhibitors to preserve the extracted proteins as much as possible and keep them functional until being analyzed by downstream applications, like western blot, ELISA, etc. One drawback of this chemical extraction is the interaction of the buffer components with antigen-antibody binding in the analysis. The interaction is sometimes difficult to predict, therefore, validation of the sample matrix is necessary before going into the real analysis, e.g., for ELISA, spike-and-recovery, linearity-of-dilution are two known validation assays to this effect. For more info about these two assay you may find this answer useful. One optimal way would be to avoid such interaction by avoiding the use of extraction buffer altogether and using mechanical methods plus protease inhibitors, instead. I don't know the drawback of this method, but one may be it is not as effective to get cytokines out their vesicles to be accessible by assay analysis.

Questions:

  1. How to use Microstrainer as a mechanical substitute for protein extraction in human gastric tissue?
  2. What are the pros and cons of using the Microstrainer?
  3. How effective is it to measure human cytokines from tissues?
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what is a micro strainer? is this an idea you have or a reference to a specific piece of equipment? several methods of the sort you have described may be used, but i've not heard of a microstrainer... –  shigeta May 18 '13 at 22:52
    
@shigeta, it is some sort of milli-pore filter that would disrupt tissue by vortexing. I have never used it, here you can find a reference that used it. –  doctorate May 20 '13 at 17:37
    
thanks - never used it so can't comment - sounds cleaner and more $$$ than a hydraulic press, a bead beater or other similar methods.. :) –  shigeta May 20 '13 at 19:37

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