Thank you for your interest in this product.
Please provide us with your contact information and your local representative
will contact you with a customized quote. Where appropriate, they can also assist you with a(n):
Estimated delivery time for your area
Product sample or exclusive offer
Basic fibroblast growth factor (bFGF) is a prototypic member of the fibroblast growth factor family. Cytokines in the FGF family possess broad mitogenic and cell survival activities (Folkman & Klagsbrun; Kimelman & Kirschner) and are involved in a variety of biological processes including cell proliferation, differentiation, survival, and apoptosis (Folkman & Klagsbrun; Klagsbrun; Rifkin & Moscatelli). bFGF has the β-trefoil structure (Ponting & Russell), binds to the four FGF receptor (FGFR) family members, and activates JAK/STAT, PI3K, ERK1/2, and other receptor tyrosine kinase (RTK) signaling pathways. It supports the maintenance of undifferentiated human embryonic stem cells (Xu et al.; Kang et al.), stimulates human embryonic stem cells to form neural rosettes (Zhang et al.), and improves proliferation of human mesenchymal stem cells and enhances chondrogenic differentiation (Solchaga et al.).
(A) The biological activity of Human Recombinant bFGF was tested by its ability to promote the proliferation of BALB/c 3T3 cells. Cell
proliferation was measured using a fluorometric assay method. The EC50 is defined as the effective concentration of the growth factor at
which cell proliferation is at 50% of maximum. The EC50 in the above example is 0.1 ng/mL.
(B) 2 μg of Human Recombinant bFGF was resolved with SDS-PAGE under reducing (+) and non-reducing (-) conditions and visualized
by Coomassie Blue staining. Human Recombinant bFGF has a predicted molecular mass of 17.1 kDa.
This product is designed for use in the following research area(s) as part
of the highlighted workflow stage(s). Explore these workflows to learn more about the other products we
offer to support each research area.
Retinoblastoma-binding proteins 4 and 9 are important for human pluripotent stem cell maintenance.
O'Connor MD et al.
Experimental hematology 2011 AUG
OBJECTIVE: The molecular mechanisms that maintain human pluripotent stem (PS) cells are not completely understood. Here we sought to identify new candidate PS cell regulators to facilitate future improvements in their generation, expansion, and differentiation. MATERIALS AND METHODS: We used bioinformatic analyses of multiple serial-analysis-of-gene-expression libraries (generated from human PS cells and their differentiated derivatives), together with small interfering RNA (siRNA) screening to identify candidate pluripotency regulators. Validation of candidate regulators involved promoter analyses, Affymetrix profiling, real-time PCR, and immunoprecipitation. RESULTS: Promoter analysis of genes differentially expressed across multiple serial-analysis-of-gene-expression libraries identified E2F motifs in the promoters of many PS cell-specific genes (e.g., POU5F1, NANOG, SOX2, FOXD3). siRNA analyses identified two retinoblastoma binding proteins (RBBP4, RBBP9) as required for maintenance of multiple human PS cell types. Both RBBPs were bound to RB in human PS cells, and E2F motifs were present in the promoters of genes whose expression was altered by decreasing RBBP4 and RBBP9 expression. Affymetrix and real-time PCR studies of siRNA-treated human PS cells showed that reduced RBBP4 or RBBP9 expression concomitantly decreased expression of POU5F1, NANOG, SOX2, and/or FOXD3 plus certain cell cycle genes (e.g., CCNA2, CCNB1), while increasing expression of genes involved in organogenesis (particularly neurogenesis). CONCLUSIONS: These results reveal new candidate positive regulators of human PS cells, providing evidence of their ability to regulate expression of pluripotency, cell cycle, and differentiation genes in human PS cells. These data provide valuable new leads for further elucidating mechanisms of human pluripotency.
Xeno-free, defined, feeder-free medium for maintenance of undifferentiated human ES and iPS cells
Item added to your cart
Human Recombinant bFGF
PRODUCTS ARE FOR RESEARCH USE ONLY AND NOT INTENDED FOR HUMAN OR ANIMAL DIAGNOSTIC OR THERAPEUTIC USES UNLESS OTHERWISE STATED. FOR ADDITIONAL INFORMATION ON QUALITY AT STEMCELL, REFER TO WWW.STEMCELL.COM/COMPLIANCE.
Contact STEMCELL Technologies
StemCell Technologies Inc. and affiliates ("STEMCELL Technologies") does not
share your email address with third parties. StemCell Technologies Inc. will use your email address to
confirm your identity and send you newsletters, transaction-related emails, promotional and customer
your email preferences at any time.