15YR企业会员
发布人:大连阿拉宁生物技术有限公司
发布日期:2024/12/19 13:15:50
由于长链PEG增链步骤繁杂、纯化困难,导致目前市场上单分散PEG产品的实际纯度普遍较低,尤其是长链PEG产品,杂质被包在根部和主峰里面,表面上看纯度很高,实际具有很大的欺骗性。但是科研人员默认了这个事实,因为在市场很难找到合格的产品。多分散PEG同样存在的问题更严重,除大量同系物带来的问题外,不同长度的PEG产生的杂质并不一样,给后续的药学研究带来影响,甚至影响成药的概率。
PEG链可以通过共价或非共价地连接到小分子药物、抗体、肽和核酸上。尽管这些混合物目前用于药物的PEG化,但它们存在几个局限性。很难在不同批次之间保持一致的产品成分,表征具有挑战性,由于PEG尺寸的异质性,药物成分的活性可能会丧失,并且在获得FDA批准方面存在障碍。[1]
过去几十年来为均匀PEG所做的合成工作,以及使用传统分散PEG进行PEG化的局限性和挑战,当分散PEG被单分散PEG替代时,在提高治疗效果和降低细胞毒性方面看到了惊人的变化,并且优化了治疗效果并缓解了副作用。[2],[3]
但是获得PEG12以上的同系物比较困难,随着链长度增加,很难得到高纯度的长链PEG产品,同时伴随着很低的产品收率。同时,通过增链得到长链PEG,由于合成步骤多,纯化困难,导致每个批次的产品质量很难保持一致。第三,长链PEG放大生产的纯化压力非常巨大,导致生产成本高,产量低。
我们抽检了国内外市场上不同类型的PEG产品,包括PEG linker, PEG lipids等,均发现上述提到的质量问题。下面是我们做的案例分析。
Quality evaluation of PEG products from multiple companies
Fmoc-N-amido-PEG24-acid purity and impurity control
Figure 1: LC-Ms of An american company
Figure 2: LC-Ms of A chinese company
Figure 3: LC-Ms of Alabiochem
Figure 5: Ms of main Peak of An american company
Figure 6: Ms of main Peak of Alabiochem
Through the mass spectrometry data in Figures 5 and 6, we found that the main peak of a certain American company's product contains impurities, and there are also many impurities at the root of the main peak. However, the main peak of Alphabiopharm's product is very clean, and there are fewer impurities at the root. Meanwhile, LC-Ms show that products from Alphabiopharm are easily purified to obtain higher quality products, while products from other companies find it difficult to further improve their quality.
超高纯PEG产品介绍
阿拉宁可以通过其创新的合成和分离技术提供高纯度、低同系物和低未知杂质的单分散PEG。以下是我们提供的部分单分散修饰PEG和PEG Lipids。
Cata#
Product Name
Cas
Purity
Homologous impurities
Unspecified impurities
LNP0007
DSPE-PEG45-NH2
474922-26-4
≥98%
≤0.3%
≤0.5%
F0703
Mal-amido-PEG24-acid
871133-36-7
≥98%
≤0.3%
≤0.5%
LNP0027
mPEG45-DSPE
474922-77-5
≥98%
≤0.3%
≤0.5%
F0316
Fmoc-N-amido-PEG24-acid
2170484-59-8
≥98%
≤0.3%
≤0.5%
F0317
Fmoc-N-amido-PEG36-acid
850312-72-0
≥98%
≤0.3%
≤0.5%
F0299
Boc-N-amido-PEG23-Amine
198227-38-2
≥98%
≤0.3%
≤0.5%
F0791
Biotin-PEG24-CH2CH2COOH
721431-18-1
≥98%
≤0.3%
≤0.5%
F0597
m-PEG24-amine
32130-27-1
≥97%
≤0.5%
≤0.7%
其它产品请查看我们的网站: www.alabiochem.com.cn