Cost analysis based on bioreactor cultivation conditions: Production of a soluble recombinant protein using Escherichia coli BL21(DE3).

The impact of the strategy on the cultivation of recombinant protein production costs are very important to define cost-effective bioreactor operating conditions. This paper presents a methodology to assess and compare the impact of costs associated with utilities and media composition, using the simple design equations and data can be accessed.

Data from batch bioreactor culture Parasite Recombinant Proteins is used as a case study involving the production of pneumococcal surface protein A, soluble recombinant proteins, employing E. coli BL21 (DE3). aquaculture strategy and the corresponding cost of the process include a variety of operating conditions, including different media, inducers, and temperature. 

Core costs associated with the media and cooling. When the price of peptone is above the threshold value of US $ 30 / kg, the medium is defined to be the best choice. IPTG and temperatures around 32 ° C led to a culture that is shorter and lower production costs PspA4Pro. The procedure offers a simple, accessible theoretical tool to identify effective strategies production costs by using a bioreactor.

 Recombinant protein Klotho increases cholesterol efflux from THP-1 macrophage-derived foam cells by pressing the Wnt / β-catenin signaling pathway.

Atherosclerosis (AS) is the basis of cardiovascular diseases, which are characterized by disorders of lipid metabolism and chronic inflammation. Although the anti-inflammatory effect of Klotho in the US has shown clearly, lipid-lowering effects is not clear. In this study, we investigated the effects of recombinant protein Klotho (Re-KL) on lipid accumulation in foam cells.THP-1 cells were exposed to 100 nM phorbol myristate acetate for 24 hours and then oxidized low-density lipoprotein (LDL ox-; 80 mg / mL) to induce the formation of foam cells.

Furthermore, the foam cells were incubated with Re-tos and / or DKK1, inhibitors of the Wnt / β-catenin pathway.Oil red O staining and cholesterol intake assay revealed that foam cell model is built successfully. Pre-treatment of foam cells with Re-KL decreased total cholesterol levels, up-regulated the expression of ATP binding transporter Purified Recombinant Proteins cassette A1 (ABCA1) and G1 (ABCG1), and down-regulated the expression of acyl coenzyme cholesterol acyltransferase 1 (ACAT1) and family members scavengers (SR-A1 and CD36). 

In addition, expression of Wnt / β-catenin signaling pathway associated proteins in the foam cells significantly decreased by the stimulus of Re-KL. Interestingly, the effect of Re-KL is similar to the foam cells.The DKK1 Re-KL-induced up-regulation of reverse cholesterol transport capacity to promote cholesterol efflux and reduce the accumulation of lipid by pressing the Wnt / β-catenin signaling pathway in the cell foam.