Human FGF4 blocking peptide (CDBP1221)

Synthetic Human FGF4 blocking peptide for BL

Product Overview
Blocking peptide for anti-FGF4 antibody
Target
FGF4
Nature
Synthetic
Species Reactivity
Human
Tag/Conjugate
Unconjugated
Application Notes
For in vitro research use only. Not intended for any diagnostic or therapeutic purpose. Not suitable for human or animal consumption.
Procedure
None
Format
Liquid
Concentration
200 μg/ml
Size
50 μg
Buffer
PBS containing 0.02% sodium azide
Preservative
0.02% Sodium Azide
Storage
Store at -20℃, stable for one year.
UniProt ID
Antigen Description
The protein encoded by this gene is a member of the fibroblast growth factor (FGF) family. FGF family members possess broad mitogenic and cell survival activities and are involved in a variety of biological processes including embryonic development, cell growth, morphogenesis, tissue repair, tumor growth and invasion. This gene was identified by its oncogenic transforming activity. This gene and FGF3, another oncogenic growth factor, are located closely on chromosome 11. Co-amplification of both genes was found in various kinds of human tumors. Studies on the mouse homolog suggested a function in bone morphogenesis and limb development through the sonic hedgehog (SHH) signaling pathway.
Function
fibroblast growth factor receptor binding; growth factor activity; heparin binding; protein tyrosine kinase activity;
Synonyms
FGF4; fibroblast growth factor 4; heparin secretory transforming protein 1 , HSTF1; HBGF 4; HST; HST 1; human stomach cancer; transforming factor from FGF related oncogene; K FGF; kaposi sarcoma oncogene; KFGF; transforming protein KS3; FGF-4; HSTF-1; oncogene HST; heparin-binding growth factor 4; heparin secretory transforming protein 1; heparin secretory-transforming protein 1; fibroblast growth factor 4 splice isoform; human stomach cancer, transforming factor from FGF-related oncogene; HST-1; HSTF1; K-FGF; HBGF-4;

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References


Signal Inhibition Reveals JAK/STAT3 Pathway as Critical for Bovine Inner Cell Mass Development

BIOLOGY OF REPRODUCTION

Authors: Meng, Fanli; Forrester-Gauntlett, Blaise; Turner, Pavla; Henderson, Harold; Oback, Bjoern

The inner cell mass (ICM) of mammalian blastocysts consists of pluripotent epiblast and hypoblast lineages, which develop into embryonic and extraembryonic tissues, respectively. We conducted a chemical screen for regulators of epiblast identity in bovine Day 8 blastocysts. From the morula stage onward, in vitro fertilized embryos were cultured in the presence of cell-permeable small molecules targeting nine principal signaling pathway components, including TGFbeta1, BMP, EGF, VEGF, PDGF, FGF, cAMP, PI3K, and JAK signals. Using 1) blastocyst quality (by morphological grading), 2) cell numbers (by differential stain), and 3) epiblast (FGF4, NANOG) and hypoblast (PDGFRa, SOX17) marker gene expression (by quantitative PCR), we identified positive and negative regulators of ICM development and pluripotency. TGFbeta1, BMP, and cAMP and combined VEGF/PDGF/FGF signals did not affect blastocyst development while PI3K was important for ICM growth but did not alter lineage-specific gene expression. Stimulating cAMP specifically increased NANOG expression, while combined VEGF/PDGF/FGF inhibition up-regulated epiblast and hypoblast markers. The strongest effects were observed by suppressing JAK1/2 signaling with AZD1480. This treatment interfered with ICM formation, but trophectoderm cell numbers and markers (CDX2, KTR8) were not altered. JAK inhibition repressed both epiblast and hypoblast transcripts as well as naive pluripotency-related genes (KLF4, TFCP2L1) and the JAK substrate STAT3. We found that tyrosine (Y) 705-phosphorylated STAT3 (pSTAT3(Y705)) was restricted to ICM nuclei, where it colocalized with SOX2 and NANOG. JAK inhibition abolished this ICM-exclusive pSTAT3(Y705) signal and strongly reduced the number of SOX2-positive nuclei. In conclusion, JAK/STAT3 activation is required for bovine ICM formation and acquisition of naive pluripotency markers.

Genomic imbalances in esophageal carcinoma cell lines involve Wnt pathway genes

WORLD JOURNAL OF GASTROENTEROLOGY

Authors: Brown, Jacqueline; Bothma, Hannelie; Veale, Robin; Willem, Pascale

AIM: To identify molecular markers shared across South African esophageal squamous cell carcinoma (ESCC) cell lines using cytogenetics, fluorescence in situ hybridization (FISH) and single nucleotide polymorphism (SNP) array copy number analysis. METHODS: We used conventional cytogenetics, FISH, and multicolor FISH to characterize the chromosomal rearrangements of five ESCC cell lines established in South Africa. The whole genome copy number profile was established from 250K SNP arrays, and data was analyzed with the CNAT 4.0 and GISTIC software. RESULTS: We detected common translocation breakpoints involving chromosomes 1p11-12 and 3p11.2, the latter correlated with the deletion, or interruption of the EPHA3 gene. The most significant amplifications involved the following chromosomal regions and genes: 11q13.3 (CCND1, FGF3, FGF4, FGF19, MYEOV), 8q24.21(C-MYC, FAM84B), 11q22.1-q22.3 (BIRC2, BIRC3), 5p15.2 (CTNND2), 3q11.2-q12.2 (MINA) and 18p11.32 (TYMS, YES1). The significant deletions included 1p31.2-p31.1 (CTH, GADD45 alpha, DIRAS3), 2q22.1 (LRP1B), 3p12.1-p14.2 (FHIT), 4q22.1-q32.1 (CASP6, SMAD1), 8p23.2-q11.1 (BNIP3L) and 18q21.1-q21.2 (SMAD4, DCC). The 3p11.2 translocation breakpoint was shared across four cell lines, supporting a role for genes involved at this site, in particular, the EPHA3 gene which has previously been reported to be deleted in ESCC. CONCLUSION: The finding that a significant number of genes that were amplified (FGF3, FGF4, FGF19, CCND1 and C-MYC) or deleted (SFRP2 gene) are involved in the Wnt and fibroblast growth factor signaling pathways, suggests that these pathways may be activated in these cell lines. (C) 2011 Baishideng. All rights reserved.

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