StemXVivo Osteogenic/Adipogenic Base Media

Kit Summary

Base media for the differentiation of MSCs into osteocytes or adipocytes. For use with StemXVivo^® Osteogenic or Adipogenic Supplements.

Why Induce Osteogenic or Adipogenic Differentiation in MSCs with Defined Media?

Despite the well-characterized factors and protocols used to differentiate mesenchymal stem/stromal cells (MSCs) into osteocytes or adipocytes, differentiation efficiencies can vary depending on the quality of the MSC starting population and the reagents used to expand and differentiate MSCs.

Osteogenic/Adipogenic Base Media:

• Supports reproducible human, mouse, and rat MSC differentiation.
• Offers flexibility to evaluate novel cytokine and growth factor combinations to induce osteogenesis or adipogenesis.
• Has been developed and optimized using MSCs.
• Can be used with StemXVivo^® Osteogenic Supplement (Catalog # CCM008 or CCM009) or StemXVivo^® Adipogenic Supplement (Catalog # CCM011) to reduce variation in differentiation.

Mesenchymal Stromal Cells or Mesenchymal Stem Cells?

The term ‘mesenchymal stromal cells’ is commonly used to describe a heterogeneous population of cultured cells that are adherent to plastic, have a distinct morphology, and express a specific set of marker proteins. Within this heterogeneous population are cells referred to as ‘mesenchymal stem cells.’

Mesenchymal stem cells are multipotent, self-renewing cells that have the ability to differentiate into adipocytes, chondrocytes, and osteoblasts when cultured in vitro. Read More about MSC Nomenclature

Human/Mouse/Rat StemXVivo^® Osteogenic/Adipogenic Base Media Components

Supplied in a 250 mL volume, this defined media contains high quality factors to drive MSC differentiation into osteocytes or adipocytes when used with additional differentiation factors.

• Supplemented with sodium bicarbonate but does not contain antibiotics.

*This kit requires supplements (not included), such as StemXVivo^® Osteogenic Supplement (Catalog # CCM008 or CCM009), StemXVivo^® Adipogenic Supplement (Catalog # CCM011), or user-selected cytokines and growth factors.

2006 Proposed Change to MSC Nomenclature

Although mesenchymal stromal cells were once referred to as ‘mesenchymal stem cells’, a change to ‘mesenchymal stromal cells’ was proposed by the International Society for Cellular Therapy in 2006.¹

The change in nomenclature originates from two important factors:

• Methods used to isolate mesenchymal stem cells yield a heterogeneous population of cells with only a fraction of these cells demonstrating multipotency.
• The absence of direct evidence that mesenchymal stem cells can self-renew and differentiate in vivo.

Use of Mesenchymal Stem and Stromal Cell Terminology

Data supporting MSC self-renewal and multipotency have been obtained using in vitro conditions, which does not adequately reflect the in vivo environment. The lack of in vivo data has led some researchers to question the validity of the term ‘mesenchymal stem cell’ providing further support for the use of ‘mesenchymal stromal cells’ to describe MSCs.² While ‘mesenchymal stromal cells’ may be the more scientifically accurate term for MSCs, the two terms are often used interchangeably in the literature. R&D Systems recognizes the use of both mesenchymal stem cells and mesenchymal stromal cells and uses ‘MSC’ to indicate mesenchymal stem/stromal cells to account for both designations.

Definitions of Mesenchymal Stromal Cells and Mesenchymal Stem Cells

• Mesenchymal Stromal Cells – A heterogeneous population of cultured cells with similar characteristics such as the ability to adhere to plastic and the expression of specific marker proteins.
• Mesenchymal Stem Cells – A subpopulation of mesenchymal stromal cells that have the capacity to self-renew and differentiate into mesodermal lineages when cultured in vitro. The capacity to self-renew and differentiate in vivo has yet to be clearly demonstrated for mesenchymal stem cells.

References

• Dominici, M. et al. (2006) Cytotherapy 8:315.
• Keating, A. (2012) Cell Stem Cell 10:709.