Chondroitin Sulfate Proteoglycan (NG2, CSPG)

The NG2 chondroitin sulfate proteoglycan is a valuable marker for many types of immature progenitor cells including pericytes/smooth muscle cells, chondroblasts and oligodendrocyte progenitors1. NG2 is often expressed in melanomas, chondrosarcomas, glioblastomas and myeloid leukemias2. Studies indicate that NG2 is involved in modulating cellular response to growth factors 3-5 and cell motility 6-7; these are critical functions in proliferation and migration of immature progenitor cells and tumor cells. Oligodendrocyte precursor cells (OPCs) are a population of NG2 expressing cells in the brain that accumulate in response to CNS injuries8. OPCs, together with microglia and astrocytes, form the glial scar, which is believed to inhibit or prevent axonal regeneration partly by producing growth inhibiting NG2 at the injury site8. It has been suggested that inhibiting NG2 at sites of spinal cord injury may increase beneficial axonal regeneration 8-9. Studies suggest that NG2 stimulates tumor growth and neovascularization in glioblastoma multiforme by inhibiting angiostatin and thus promoting angiogenesis10. As NG2 is associated with increased tunmor cell proliferation, it may be a potential therapeutic marker in brain tumors11.\n\nApplications:\nSuitable for use in Immunofluorescence, Immunoprecipitation, Immunoelectron microscopy and FACS analysis. Other applications not tested.\n\nRecommended Dilution:\nImmunoprecipitation: 1ug/106 cells \nFACS analysis: 1-2ug/10e6 cells\nOptimal dilutions to be determined by the researcher.\n\nStorage and Stability:\nMay be stored at 4 degrees C for short-term only. For long-term storage, store at -20 degrees C. Aliquots are stable for at least 12 months at -20 degrees C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.

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SPECIFICATIONS

Catalog Number

C5067-70

Size

100ug

Applications

FC, IF, IP

Hosts

Mouse

Reactivities

Hum

Form

Supplied as a liquid in PBS pH 7.6, 0.25M sodium chloride, 0.1% sodium azide, before the addition of glycerol to 40%. Also available without azide. See C5067-70L.

P Type

Mab

Purity

Purified by Protein A affinity chromatography.

Isotype

IgG2a

References

1. Stallcup WB, et al. J Neurocytol 31(6-7):423-35, 2002.\n2. Stallcup WB, et al. J Cell Sci 114:2315-2325, 2001.\n3. Grako KA and Stallcup WB. Exp Cell Res 221(1):231-40, 1995.\n4. Grako KAJ, et al. Cell Sci 112(6):905-15, 1999.\n5. Goretzki L, et al. J Biol Chem 274(24):16831-7, 1999.\n6. Burg MA, et al. Exp Cell Res 235(1):254-64, 1997.\n7. Fang X, et al. Mol Biol Cell (10):3373-87, 1999.\n8. Chen ZJ, et al. J Neurocytol 31(6-7):481-95, 2002.\n9. Jones LL, et al. J Neurosci 22(7):2792-2803, 2002.\n10. Chekenya M, et al. FASEB J 16:586-588, 2002.\n11. Chekenya M, et al. J Neurocytol (6-7):507-21, 2002.\nGeneral References:\n1. Bumoi, T.F. et al. (1984) J. Biol. Chem. 258: 12733

Additional Info

Recognizes mature chondroitin sulfate proteoglycan core glycoprotein of 250kD as well as precursor polypeptides of 210, 220 and 240kD. Reacts with human melanoma, glioma and proliferating brain endothelial cells.