Enhanced expression of soluble antibody fragments by low-temperature and overdosing with a nitrogen source.

Escherichia coli has been a primary host for the prokaryotic production of antibody fragments (Fabs) and has contributed to several successes in the pharmaceutical industry. Nevertheless, the requirement of disulfide bonds often results in low-yield fermentation and a lack of cost-effectiveness. Despite the improved production of functional Fabs by fermentation below 30 °C, the limited cellular growth needs further work.

Purification of antibody fragments for the reduction of charge variants using cation exchange chromatography.

Recently, antibody fragments have been studied as therapeutic agents because they lack Fc effector function while having affinity similar to their original monoclonal antibody and can be produced using E. coli. Antibody fragments can be purified using affinity chromatography in the capture step, although they need a polishing step because of product-related impurities, mainly charge variants.

Altered oral absorption of alcohol by combined aqueous extracts of four herbal plants in rats.

This study examined the effect of combined aqueous extracts (BHR) of Ginko biloba, Mentha arvensis var. piperascens, Citrus unshiu, and Pueraria lobata var. chinensis on oral absorption of alcohol in rats.

The prolonged half-lives of new erythropoietin derivatives via peptide addition.

Erythropoietin, or Epo, is a hematopoietic cytokine that promotes erythropoiesis, and recombinant human Epo has been used in the treatment of anemia in various chronic diseases. Here, we have constructed novel Epo derivatives with prolonged half-lives by adding peptides to the carboxy terminus of Epo without using linkers. The fused peptides were selected from the carboxy terminal region of human chorionic gonadotropin (hCG) or human thrombopoietin (hTpo), which promote the proper folding, secretion, and stabilization of bioactive glycoproteins.