DLL4 Protein, Human, Recombinant (ECD, hFc Tag)

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DLL4 Protein, Human, Recombinant (ECD, hFc Tag): 产品信息

纯度
> 95 % as determined by SDS-PAGE
内毒素
< 1.0 EU per μg of the protein as determined by the LAL method
生物活性
1. Measured by its binding ability in a functional ELISA. Immobilized Mouse NOTCH1-His (Cat: 50654-M08B) at 2 μg/ml (100 μl/well) can bind human DLL4-hFc (Cat: 10171-H02H), the EC50 of human DLL4-hFc is 15-90 ng/mL.
2. Measured by the ability of the immobilized protein to enhance BMP2-induced alkaline phosphatase activity in C3H10T1/2 mouse embryonic fibroblast cells. The ED50 for this effect is typically 1-8 µg/mL in the presence of 500 ng/mL recombinant human BMP2.
蛋白构建
A DNA sequence encoding the extracellular domain (Met1-Pro524) of human DLL4 (NP_061947.1) was expressed with the Fc region of human IgG1 at the C-terminus.
NP No.
表达宿主
HEK293 Cells
种属
Human
预测 N 端
Ser 27
分子量
The recombinant human DLL4/Fc is a disulfide-linked homodimeric protein after removal of the signal peptide. The reduced monomer consists of 736 amino acids and predicts a molecular mass of 81 kDa. As a result of glycosylation, the rh DLL4/Fc monomer migrates as approximately 100-110 kDa band in SDS-PAGE under reducing conditions.
缓冲液
Lyophilized from sterile PBS, pH 7.4
Please contact us for any concerns or special requirements.
Normally 5 % - 8 % trehalose, mannitol and 0.01% Tween80 are added as protectants before lyophilization.
Please refer to the specific buffer information in the hard copy of CoA.
运输方式
In general, recombinant proteins are provided as lyophilized powder which are shipped at ambient temperature.
Bulk packages of recombinant proteins are provided as frozen liquid. They are shipped out with blue ice unless customers require otherwise.
稳定性 & 储存条件
Samples are stable for up to twelve months from date of receipt at -20℃ to -80℃
Store it under sterile conditions at -20℃ to -80℃. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.
复溶
A hardcopy of COA with reconstitution instruction is sent along with the products. Please refer to it for detailed information.

DLL4 Protein, Human, Recombinant (ECD, hFc Tag): 图片

Measured by its binding ability in a functional ELISA. Immobilized Mouse NOTCH1-His (Cat: 50654-M08B) at 2 μg/ml (100 μl/well) can bind human DLL4-hFc (Cat: 10171-H02H), the EC50 of human DLL4-hFc is 15-90 ng/mL.
Measured by the ability of the immobilized protein to enhance BMP2-induced alkaline phosphatase activity in C3H10T1/2 mouse embryonic fibroblast cells. The ED50 for this effect is typically 1-8 µg/mL in the presence of 500 ng/mL recombinant human BMP2.

DLL4 Protein, Human, Recombinant (ECD, hFc Tag): 别称

Delta-like 4 Protein, Human; hdelta2 Protein, Human

DLL4 背景信息

Delta-like protein 4 (DLL4, Delta4), a type I membrane-bound Notch ligand, is one of five known Notch ligands in mammals and interacts predominantly with Notch 1, which has a key role in vascular development. Recent studies yield substantial insights into the role of DLL4 in angiogenesis. DLL4 is induced by vascular endothelial growth factor (VEGF) and acts downstream of VEGF as a 'brake' on VEGF-induced vessel growth, forming an autoregulatory negative feedback loop inactivating VEGF. DLL4 is downstream of VEGF signaling and its activation triggers a negative feedback that restrains the effects of VEGF. Attenuation of DLL4/Notch signaling results in chaotic vascular network with excessive branching and sprouting. DLL4 is widely distributed in tissues other than vessels including many malignancies. Furthermore, the molecule is internalized on binding its receptor and often transported to the nucleus. In pathological conditions, such as cancer, DLL4 is up-regulated strongly in the tumour vasculature. Blockade of DLL4-mediated Notch signaling strikingly increases nonproductive angiogenesis, but significantly inhibits tumor growth in preclinical mouse models. In preclinical studies, blocking of DLL4/Notch signaling is associated with a paradoxical increase in tumor vessel density, yet causes marked growth inhibition due to functionally defective vasculature. Thus, DLL4 blockade holds promise as an additional strategy for angiogenesis-based cancer therapy.
全称
delta-like 4 (Drosophila)
参考文献
  • Yan M, et al. (2007) Delta-like 4/Notch signaling and its therapeutic implications. Clin Cancer Res. 13(24): 7243-6.
  • Sainson RC, et al. (2007) Anti-Dll4 therapy: can we block tumour growth by increasing angiogenesis? Trends Mol Med. 13(9): 389-95.
  • Martinez JC, et al. (2009) Nuclear and membrane expression of the angiogenesis regulator delta-like ligand 4 (DLL4) in normal and malignant human tissues. Histopathology. 54(5): 598-606.
  • Li JL, et al. (2010) Targeting DLL4 in tumors shows preclinical activity but potentially significant toxicity. Future Oncol. 6(7): 1099-103.
  • Technical Advance: Ascorbic acid induces development of double-positive T cells from human hematopoietic stem cells in the absence of stromal cells
    Author
    Huijskens, MJ;Walczak, M;Koller, N;Briedé, JJ;Senden-Gijsbers, BL;Schnijderberg, MC;Bos, GM;Germeraad, WT;
    Year
    2014
    Journal
    J. Leukoc. Biol.
    Application
    culture
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