Abstract: The present invention relates to a method of expanding stem cells cultured as cell aggregates in a suspension culture changing culture medium and a method of medium exchange for the same cells characterized in the use of a rotating mesh such as a spinfilter device. The present invention further relates to a use of a rotating mesh for medium exchange in a suspension culture of stem cells.

Abstract: The present invention relates to a method of changing culture medium of a suspension culture, the suspension culture comprising cells suspended in the culture medium, the method comprising: (i) transferring a fraction of the suspension culture into a container, wherein the container comprises at least one opening at the bottom; (ii) allowing the cells comprised in the fraction of the suspension to settle at the at least one opening at the bottom of the container by gravitation, thereby forming a supernatant; (iii) dispensing the cells settled at the bottom of the container (back) into the suspension culture; (iv) discarding the supernatant.