1. 重组蛋白
  2. Cytokines and Growth Factors
  3. Noggin 蛋白, Human (CHO)

Noggin 是骨形态发生蛋白 (BMPs) 的拮抗剂和 TGF-β超家族拮抗剂,以同源二聚体形式存在。Noggin 通过结合 BMP-2/-4/-7,抑制其与 BMPR-I/II 受体结合,而在 HMSC 中协同诱导骨分化、在 hESC 中维持多能性、在 HUVEC 中抑制血管生成,并在少突胶质细胞中促进髓鞘化,发挥神经活性。Noggin 蛋白, Human (CHO) 是重组的人源 Noggin 蛋白,由 CHO 细胞表达,不带标签。

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描述

Noggin is an antagonist of bone morphogenetic proteins (BMPs) and a member of the TGF-β superfamily, existing as a homodimer. Noggin binds to BMP-2/-4/-7 and inhibits their binding to BMPR-I/II receptors, thereby synergistically inducing bone differentiation in HMSCs, maintaining pluripotency in hESCs, inhibiting angiogenesis in HUVECs, and promoting myelination in oligodendrocytes, exerting neural activity[1][2][3][4]. Noggin Protein, Human (CHO) is a recombinant human Noggin protein expressed in CHO cells with tag-free.

研究背景

1. Noggin 的特点
Noggin 属于 TGF-β 超家族拮抗剂,并与 Chordin、Gremlin 等同属 BMP 结合蛋白家族,通过分泌型蛋白机制发挥作用,对于骨骼的正常发育至关重要[1][5][6]。Noggin 是由二硫键连接的糖基化同源二聚体,含保守的半胱氨酸结结构域 (cysteine-knot domain)。Noggin 可特异性靶向 BMP-2、-4、-7 等配体而抑制其与受体结合[3],对 hBMP-4 具有高亲和力,对 hBMP-4 具有较低亲和力,还是 hBMP-7 的拮抗剂[5]。Noggin 结合 BMPs (如 BMP-2/-4) 阻断其与 I 型 (BMPR-IA/IB) 和 II 型 (BMPR-II) 丝氨酸/苏氨酸激酶受体的相互作用,抑制 Smad1/5/8 磷酸化及下游转录。
Noggin 参与骨分化调控:在人间充质干细胞 (HMSC) 中,Noggin 协同 T 细胞炎症因子 (TTII) 或 Dexamethasone (HY-14648) 诱导碱性磷酸酶活性与矿化,上调 BMP-2 和骨钙素 (Osteocalcin) 表达,但不影响 Runx2[1]
Noggin 参与干细胞多能性维持:在人胚胎干细胞 (hESC) 中抑制 BMP4 诱导的分化,维持 Oct4、Nanog 等多能性基因表达,促进细胞增殖[2]
Noggin 抑制血管生成:在人脐静脉内皮细胞 (HUVEC) 中阻断 BMP-4 信号,抑制细胞迁移、管形成及血管生成,下调 BMP-4 mRNA 水平[3]
Noggin 促进神经髓鞘化:在少突胶质细胞分化中,解除 BMP 对 Sox10/Nkx2.2 的抑制,促进 Myelin Basic Protein (MBP) 表达及髓鞘形成[4]

2. Noggin 的应用
Noggin 与 BMP 联用调控成骨-破骨平衡,用于骨缺损修复,而适用于骨组织工程[1]。Noggin 还维持 hESC 多能性,可优化少突胶质前体细胞分化,用于多发性硬化等髓鞘疾病模型的研究[2]。Noggin 还通过抑制内皮细胞迁移防治肿瘤血管生成,具有抗癌活性。Noggin 预处理少突胶质前体细胞可增强其在 BMP 缺陷 shiverer 小鼠的髓鞘化[4]

体外研究
(In Vitro)

Noggin Protein (人源;200 ng/mL;10 d 或 3 周) 在人间充质干细胞 (HMSC) 中诱导碱性磷酸酶活性与矿化,与 T 细胞炎症因子 (TTII:TNF-α,TGF-β,IFN-γ,IL-17) 或 100 nM Dexamethasone (HY-14648) 协同作用,可上调 BMP-2 和骨钙素基因表达,但不影响 Runx2 表达[1]
Noggin Protein (人源;400 ng/mL;14 d) 在人胚胎干细胞 (hESC) 中维持多能性,抑制自发分化,促进细胞增殖,与 Matrigel 联用可增强 Oct4 和 SSEA-4 表达[2]

体内研究
(In Vivo)

Noggin Protein (人源;0.45-0.9 mg/kg;皮下渗透泵植入;4 周) 在 C57BL/6 和 apoE-/- 小鼠中可拮抗 BMP4 诱发的高血压、血管 NADPH 氧化酶活化以及内皮功能障碍[7]

生物活性

1.ED50 < 2.5 ng/mL, measured in a bioassay using ATDC5 cells in the presence of 10 ng/mL human BMP-4.
2.Measured by its ability to inhibit BMP-4-induced alkaline phosphatase production by ATDC5 mouse chondrogenic cells. The ED50 for this effect is ≤43.8 ng/mL in the presence of 50 ng/mL of Recombinant Human BMP-4 (HY-P7007).

  • Measured by its ability to inhbit BMP-4-induced alkalnephosphatase production by ATDC5 mouse chondrogenic cells in the presence of Recombinant Human BMP-4 (40 ng/mL), with an ED50 of 4 ng/mL.
种属

Human

表达系统

CHO

标签

Tag Free

蛋白编号

Q13253 (Q28-C232)

基因 ID
蛋白结构
N-term
Noggin (Q28-C232)
Accession # Q13253
C-term
蛋白长度

Full Length of Mature Protein

中文名
Noggin 蛋白
同用名
rHuNoggin; NOG
氨基酸序列

QHYLHIRPAPSDNLPLVDLIEHPDPIFDPKEKDLNETLLRSLLGGHYDPGFMATSPPEDRPGGGGGAAGGAEDLAELDQLLRQRPSGAMPSEIKGLEFSEGLAQGKKQRLSKKLRRKLQMWLWSQTFCPVLYAWNDLGSRFWPRYVKVGSCFSKRSCSVPEGMVCKPSKSVHLTVLRWRCQRRGGQRCGWIPIQYPIISECKCSC

分子量

Approximately 25-31 kDa due to the glycosylation.

糖基化修饰
Yes
纯度

Greater than 95% as determined by reducing SDS-PAGE.

性状

无菌粉末

组分

Lyophilized from a 0.2 μm filtered solution of PBS, pH 7.4. Normally 8% trehalose is added as protectant before lyophilization.

内毒素含量

<0.2 EU/μg, determined by LAL method.

复溶方法

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH2O. For long term storage it is recommended to add a carrier protein (0.1% BSA, 5% HSA, 10% FBS or 5% Trehalose).

保存条件 & 期限

Stored at -20°C for 2 years from date of receipt. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

运输条件

Room temperature in continental US; may vary elsewhere.

文件资料
参考文献

Noggin Protein, Human (CHO) 相关分类

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

  • 复溶计算器

  • 重组蛋白稀释计算器

  • 比活力计算器

The reconstitution calculator equation

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration
= ÷

The dilution calculator equation

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

浓度 (start) × 体积 (start) = 浓度 (final) × 体积 (final)
× = ×
C1   V1   C2   V2

The specific activity calculator equation

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)
Unit/mg = 106 ÷ ng/mL

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产品名称:
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目录号:
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