We used the RayBio® C-Series Rat Growth Factor Array 1 Kit to profile growth factor composition in rat tissue-derived liquid samples, including decellularized tissue matrix extracts and conditioned media. The kit detects 14 rat growth factors simultaneously, which makes it very useful for initial screening and comparative analysis between different sample groups. Samples were processed according to the manufacturer’s instructions. Briefly, protein extracts were prepared in PBS-based buffer with protease inhibitors, clarified by centrifugation, and applied to the membrane array without additional pre-treatment. All incubations were performed at room temperature with gentle agitation, and chemiluminescent detection was used for signal development. The array showed good sensitivity and clear spot definition, with low background after proper washing. Positive and negative controls on the membrane performed as expected, which helped ensure data reliability. Signal intensity was consistent across technical replicates, allowing for semi-quantitative comparison between samples. Overall, this kit is easy to use, reproducible, and suitable for various liquid sample types. It is particularly helpful for exploratory studies to evaluate growth factor retention or differences across experimental conditions before moving on to more quantitative assays such as ELISA or mass spectrometry.

Review by steve, from The University of Texas Southwestern Medical Center, on Dec 10, 2025