Cultrex PathClear Reduced Growth Factor BME, Type 2

Basement Membrane Extract
Catalog # Availability Size / Price Qty
3533-005-02
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Cultrex PathClear Reduced Growth Factor BME, Type 2 Summary

Endotoxin Level
<8.0 EU per 1 μg of the protein by the LAL method.
Activity
Functional Assay - Tube formation assay: BME promotes formation of capillary-like structures by human (HBMVEC; HUVEC) or mouse (SVEC4-10) endothelial cells.

Gelling Assay - BME gels in less than 30 minutes at 37°C, and maintains the gelled form in culture medium for a minimum of 14 days at 37°C.
Source

Murine Engelbreth-Holm-Swarm (EHS) tumor.

Product Datasheets

3533-005-02

Formulation 12 - 18 mg/mL.
Shipping The product is shipped with dry ice or equivalent. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage: Product is stable for a minimum of 3 months from date of shipment when stored at –20°C in a manual defrost freezer. For optimal stability, store at –80°C. Avoid freeze-thaw cycles.

Storage Buffer: Dulbecco’s Modified Eagle’s medium without phenol red, with 10 μg/ml gentamicin sulfate.

Sterility Testing:
• PathClear® - Negative by PCR test for mycoplasma; 17 bacterial and virus strains typically included in mouse antibody production (MAP) testing, plus 13 additional murine infectious agents including LDEV, for a total of 31 organisms and viruses.
• No bacterial or fungal growth detected after incubation at 37°C for 14 days following USP sterility testing guidelines.
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Background: Basement Membrane Extracts

Cultrex® Basement Membrane Extract (BME) is a soluble form of basement membrane purified from Engelbreth-Holm-Swarm (EHS) tumor. The extract gels at 37°C to form a reconstituted basement membrane. The major components of BME include laminin, collagen IV, entactin, and heparin sulfate proteoglycan. BME can be used in a multiple applications, under a variety of cell culture conditions, for maintaining growth or promoting differentiation of primary endothelial, epithelial, smooth muscle and stem cells. BME can also be utilized in cell attachment, neurite outgrowth, angiogenesis, in vitro cell invasion and in vivo tumorigenicity assays.

Recently we have developed two additional formulations of Cultrex® BME known as Cultrex® BME Type 2 and Cultrex® BME Type 3. Cultrex® BME Type 2 provides a proprietary formulation that is higher in tensile strength when compared to our original BME, while Cultrex® BME Type 3 is physiologically aligned with the in vivo solid tumors environment and is recommended for xenografts and other in vivo applications.

There are many applications for Cultrex® BME, which require different thicknesses and concentrations. In general, BME at a protein concentration ≥ 10 mg/ml is used for differentiation studies of primary cells. For applications such as endothelial cell formation of capillary-like structures (Tube Formation Assay), the differentiation of rat aorta tissue into capillary-like structures (Aortic Ring Assay), epithelial organoid formation, or tumor organoid formation, a thick gel is needed. Some applications, such as propagation of primary cells, require a thin layer coating and not a thick gel; therefore, the thin layer method should be used.

Alternate Names
Basement Membrane Extracts

FAQs

  1. How does Cultrex® BME promote cell differentiation?

    • All epithelial and endothelial cells are in contact with a basement membrane matrix on at least one of their surfaces. By providing them with their natural matrix in vitro as a substrate for the cells that provides biological cues, the cells can assume a more physiological morphology (i.e. correct shape) and begin expression of cell-lineage specific proteins. Two-dimensional plastic substrates, in combination with serum-containing media, cause cells to flatten, proliferate and de-differentiate.

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