Determination of the Molecular Weight Distribution of the PEGylated Bovine Hemoglobin (PEG-bHb)

Characterization of Poly(ethylene glycol)-modified Bovine Hemoglobin By Capillary Zone Electrophoresis

In this study capillary zone electrophoresis (CZE) was used to analyze the poly(ethylene glycol)-modified bovine hemoglobin(PEG-bHb). The results show that CZE separated the subunit of bovine hemoglobin based on the number of PEG conjugating to the protein surface, which makes it possible to evaluate the degree of modification of hemoglobin subunit; meanwhile, it also reflected the stability of PEG attaching to hemoglobin after incubating with hydroxylamine, which makes it successful to detect the distribution of attachment site and evaluate the stability of PEG on the surface of hemoglobin. As a simple, fast and accurate method, CZE is suitable to monitor the production procedures and quality control of the final products of the PEG-bHb.

Blood substitutes based on nanobiotechnology

Stimulated by concerns of potential infective agents in donated blood, commercial enterprises have attempted to develop blood substitutes since the 1900s. After several years of development, a few of the many leads are showing promise. In this article, nanobiotechnological approaches that are now in phase III clinical trials are reviewed, followed by a discussion of how important basic knowledge gained is being used to develop new generations of blood substitutes based on nanobiotechnology.