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Minimal Detectable Amounts of Exogenous DNA after Systemic Cell Engraftment

Author(s): Daniel Rodrigo Marinowic, Daniele Vieira Da Silva, Alessandra Deise Sebben, Denise Cantarelli Machado, Jaderson Costa Da Costa

In cellular therapy models, the establishment of accurate methods to track the homing, cell fate and survival are fundamental to ensure safety and efficacy. The PCR is used to detect donor cells DNA in xenotransplant models. Five different concentrations of EGFP+ DNA from C57/BL6 mouse muscle tissue: 1,000 pg/μL, 500 pg/μL, 100 pg/μL, 10 pg/μL e 1 pg/μL were used to contaminate 10 ng/μL of DNA Wistar rat. Polymerase chain reaction was performed using 2 μL of each sample. EGFP+DNA were detected in samples containing 2,000 pg, 1,000 pg, 200 pg and 20 pg. Samples with 2 pg EGFP+DNA did not show signal. Here we demonstrate an alternative to proving the presence or confirm the absence, of exogenous DNA in organs and tissues. The concentration curve for cell migration detection by real time PCR will allow the use in systemically transplanted cells in animal models subjected to cell therapy.

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