The author would like to thank Dr. Dongxuan Jia for technical assistance. Some of the images appearing in this article were in collaboration with Dr. Malcolm S. Steinberg, Department of Molecular Biology, Princeton University. The author would also like to thank the Department of Defense Prostate Cancer Research Program (grants PC-030482 and PC-991552) and the NCI/NIH (grant R01CA118755)for their generous support.

1. Preparation of a Single Cell Suspension
<ol>
	<li>Adherent cell cultures should be grown to 90% confluence, whereupon monolayers should be rinsed twice with PBS. After draining well, add 2 mls (for 100 mm plates) of 0.05% trypsin-1 mM EDTA, and incubate at 37&deg;C until cells detach. Stop trypsinization by adding 2 mls of complete medium and gently use a 5 ml pipette to triturate the mixture until cells are in suspension. Transfer cells to a 15 ml conical tube.</li>
	<li>Add 40 &mu;l of a 10 mg/ml DNAse stock and ...

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No conflicts of interest declared.

Studies have shown that culturing cells in a three-dimensional context (3D) produces distinct cellular morphology and signaling when compared to a rigid two-dimensional (2D) culture system9. For example, fibroblast-populated collagen gels demonstrate that fibroblast morphology in 3D is quite distinct from that observed in 2D 10,11. Similarly, 3D culture can induce tissue-specific differentiation of mammary epithelial cells. 3D culture systems have been used to distinguish between normal and malignan...

<ul>
	<li>automatic cell counter (BioRad TC10)</li>
	<li>shaking water bath with CO2 gable cover Model 3540 (Lab-line)</li>
</ul>

a simple hanging drop cell culture protocol for generation of 3d spheroids

Studies of cell-cell cohesion and cell-substratum adhesion have historically been performed on monolayer cultures adherent to rigid substrates. Cells within a tissue, however, are typically encased within a closely packed tissue mass in which cells establish intimate connections with many near-neighbors and with extracellular matrix components. Accordingly, the chemical milieu and physical forces experienced by cells within a 3D tissue are fundamentally different than those experienced by cells grown in monolayer culture. This has been shown to markedly impact cellular morphology and signaling. Several methods have been devised to generate 3D cell cultures including encapsulation of cells in collagen gels1or in biomaterial scaffolds2. Such methods, while useful, do not recapitulate the intimate direct cell-cell adhesion architecture found in normal tissues. Rather, they more closely approximate culture systems in which single cells are loosely dispersed within a 3D meshwork of ECM products. Here, we describe a simple method in which cells are placed in hanging drop culture and incubated under physiological conditions until they form true 3D spheroids in which cells are in direct contact with each other and with extracellular matrix components. The method requires no specialized equipment and can be adapted to include addition of any biological agent in very small quantities that may be of interest in elucidating effects on cell-cell or cell-ECM interaction. The method can also be used to co-culture two (or more) different cell populations so as to elucidate the role of cell-cell or cell-ECM interactions in specifying spatial relationships between cells. Cell-cell cohesion and cell-ECM adhesion are the cornerstones of studies of embryonic development, tumor-stromal cell interaction in malignant invasion, wound healing, and for applications to tissue engineering. This simple method will provide a means of generating tissue-like cellular aggregates for measurement of biomechanical properties or for molecular and biochemical analysis in a physiologically relevant model.

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A Simple Hanging Drop Cell Culture Protocol for Generation of 3D Spheroids

We describe a simple, rapid method of generating 3D tissue-like spheroids and their potential application to quantify differences in cell-cell interactions.

Studies of cell-cell cohesion and cell-substratum adhesion have historically been performed on monolayer cultures adherent to rigid substrates. Cells ...

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56.4K vistas.  UMDNJ-Robert Wood Johnson Medical School. Se describe un método simple, rápido de generación de 3D, como los tejidos esferoides y su potencial aplicación para cuantificar las diferencias en las interacciones célula-célula.