计算溶液所需的质量、体积或浓度。
冻干粉,天然 级 提供 ≥95%(SDS-PAGE) 纯度,适用于对基线干扰要求严格的色谱和分析工作流程。
-20°C储存,避免反复冻融。超低温运输 。请查阅批次 COA 获取详细规格。
SDS、COA、产品数据表及规格说明书均可下载。可通过批号查询获取批次 COA。
在色谱分析、有机合成和交叉偶联反应领域已被 0 篇同行评审文献引用。
α1‑酸性糖蛋白(AGP)是重要的药物载体蛋白,可影响药物的药代动力学与药效学性质。AGP 为主要急性期蛋白,参与调控免疫与炎症反应。
蛋白生物学功能
α1‑酸性糖蛋白(AGP)是一种糖蛋白,在血浆中含量为 55–140 mg/dL;分子含有 5 条 N‑连接糖链,糖基部分占总分子量 40–45%,包含唾液酸化的双天线 / 三天线 / 四天线糖结构,这类结构对配体相互作用至关重要,因此该蛋白常作为糖基化研究的标准品。
作为主要急性期反应蛋白,发生炎症时 AGP 表达量最高可升高 5 倍;它可与触珠蛋白联用,用于急性炎症诊断,并区分肝性黄疸与梗阻性黄疸。在病理状态下,其糖基化谱会发生改变:急性炎症时双天线糖链与 α1,3‑岩藻糖基化糖链增多;慢性病变则以三天线、四天线岩藻糖基化糖链升高为主。
AGP 结合孕酮的亲和力是白蛋白的 15 倍;当唾液酸缺失时,还可与维生素 B12 形成复合物,进而影响药物药代动力学及营养物质转运。AGP 通过与 TLR‑2/4 相互作用调控免疫:会加重 TLR‑2 介导的脓毒症死亡风险,同时抑制 LPS 诱导的中性粒细胞胞外诱捕网形成(NETosis)。
AGP 表达异常与类风湿关节炎、华氏巨球蛋白血症以及转移性肿瘤相关;在上述疾病中,不同糖型会改变血小板聚集与中性粒细胞黏附能力。AGP / 触珠蛋白比值可辅助诊断骨髓疾病与溶血性贫血,反映红细胞生成活性。
在临床治疗层面,AGP 的药物结合特性可指导碱性药物(如氯丙嗪)的个体化给药;同时,人工改造糖型的 AGP 也被研究用于靶向抗炎治疗。
Alpha 1 Acid Glycoprotein (AGP) is a key carrier protein of drugs influencing pharmacokinetics and pharmacodynamics. AGP is a major acute phase protein modulating Immune and inflammatory responses.
Role of protein in biology
Alpha-1 acid glycoprotein (AGP), a glycoprotein constituting 55–140 mg/dL of plasma, features five N-linked glycan chains comprising 40–45% of its mass, including sialylated bi-/tri-/tetra-antennary structures critical for ligand interactions. Thus contributing to its use as a standard for glycosylation studies. As a major acute-phase reactant, AGP surges up to 5-fold during inflammation, synergizing with haptoglobin to diagnose acute inflammation and differentiate hepatic vs. obstructive jaundice. Its glycosylation profile shifts in pathologies: acute inflammation increases bi-antennary and α1,3-fucosylated glycans, while chronic states enhance tri-/tetra-antennary fucosylation. AGP binds progesterone 15× more avidly than albumin and complexes with vitamin B-12 when sialic acid-deficient, influencing drug pharmacokinetics and nutrient transport.
AGP modulates immunity via TLR-2/4 interactions, exacerbating TLR-2-mediated sepsis mortality while inhibiting LPS-driven NETosis. Dysregulated AGP correlates with rheumatoid arthritis, Waldenström macroglobulinemia, and metastatic cancers, where glycoforms alter platelet aggregation and neutrophil adhesion. The AGP:haptoglobin ratio aids in diagnosing bone marrow disorders and hemolytic anemia, reflecting erythropoietic activity Therapeutically, AGP’s drug-binding capacity informs personalized dosing for basic drugs (e.g., chlorpromazine), while engineered glycoforms are explored for targeted anti-inflammatory therapies.