Hi
I recently ran a multiplex assay examining GM-CSF, IL-6, IL-8, IL-10, IL-1β, and TNF-α. After analyzing the data, I saw different results for my IL-6 and IL-8 than when I previously ran these same samples with an In-House ELISA. The significant trend observed in the ELISA is no longer present in the multiplex. I am trying to figure out why this is happening. I have contacted the company, but I am trying to determine why the results differ.
I would like to note that in the ELISA, I used a 1:5 dilution (20 μL of sample), which was done with fresh samples.
The multiplex was run neat with 25 μL of sample, and the samples had undergone two freeze-thaws before being run.