"Previous studies have demonstrated that cell populations that are cultured with heterologous animal products can acquire xenoantigens, potentially limiting their clinical utility because of immune responses. Embryonic stem cells (ESCs) are an attractive source of multiple potential cellular therapies and are typically derived and routinely cultured on murineembryonicfibroblast (MEF) feeder cell layers in commercially available serum replacement (SR) medium or fetal calf serum (FCS)-containing medium," scientists in the United States report.
"Recently, we found that a strong antibody response was generated in human subjects after the second infusion of therapeutic...
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