Isolation of Cultured Human Monocytes/Macrophages in Suspension Utilizing Liquid and Solid Phase Gelatin

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Abstract
We developed a method which provides a mechanism for isolating adherent mononuclear cells without subjecting them to traumatic physical or chemical methods of removal from their surface attachment sites. This method uses gelatin, which is solid at room temperature and liquid at 37d`C, as the adhering surface. Blood monocytes bind to gelatin-coated flasks at room temperature and are easily and gently removed when the gelatin is liquified at 37d`C. Monocytes, so isolated, are viable and functional [phagocytosis, adherence and Fc(IgG) and C3 receptor activity].