Reducing the Requirement for Serum Supplements in High Yield Microcarrier Cell Culture

Author(s):  
Julian Clark
2021 ◽  
Vol 12 ◽  
pp. 204173142110086
Author(s):  
Jun Yong Kim ◽  
Won-Kyu Rhim ◽  
Yong-In Yoo ◽  
Da-Seul Kim ◽  
Kyoung-Won Ko ◽  
...  

Exosomes derived from mesenchymal stem cells (MSCs) have been studied as vital components of regenerative medicine. Typically, various isolation methods of exosomes from cell culture medium have been developed to increase the isolation yield of exosomes. Moreover, the exosome-depletion process of serum has been considered to result in clinically active and highly purified exosomes from the cell culture medium. Our aim was to compare isolation methods, ultracentrifuge (UC)-based conventional method, and tangential flow filtration (TFF) system-based method for separation with high yield, and the bioactivity of the exosome according to the purity of MSC-derived exosome was determined by the ratio of Fetal bovine serum (FBS)-derived exosome to MSC-derived exosome depending on exosome depletion processes of FBS. The TFF-based isolation yield of exosome derived from human umbilical cord MSC (UCMSC) increased two orders (92.5 times) compared to UC-based isolation method. Moreover, by optimizing the process of depleting FBS-derived exosome, the purity of UCMSC-derived exosome, evaluated using the expression level of MSC exosome surface marker (CD73), was about 15.6 times enhanced and the concentration of low-density lipoprotein-cholesterol (LDL-c), known as impurities resulting from FBS, proved to be negligibly detected. The wound healing and angiogenic effects of highly purified UCMSC-derived exosomes were improved about 23.1% and 71.4%, respectively, with human coronary artery endothelial cells (HCAEC). It suggests that the defined MSC exosome with high yield and purity could increase regenerative activity.


2018 ◽  
Vol 35 (2) ◽  
pp. e2750 ◽  
Author(s):  
Ahmed A. Ahmed ◽  
CJ Luo ◽  
Sandra Perez‐Garrido ◽  
Connor R. Browse ◽  
Christopher Thrasivoulou ◽  
...  

1982 ◽  
Vol 124 (2) ◽  
pp. 353-358 ◽  
Author(s):  
Toshiko Imamura ◽  
Charles L. Crespi ◽  
William G. Thilly ◽  
Henri Brunengraber

1980 ◽  
Vol 6 (3-4) ◽  
pp. 97-100 ◽  
Author(s):  
Héctor Montes Oca
Keyword(s):  

2008 ◽  
Vol 389 (5) ◽  
Author(s):  
M. Keith Howard ◽  
Otfried Kistner ◽  
P. Noel Barrett

AbstractThe rapid spread of avian influenza (H5N1) and its transmission to humans has raised the possibility of an imminent pandemic and concerns over the ability of standard influenza vaccine production methods to supply sufficient amounts of an effective vaccine. We report here on a robust and flexible strategy which uses wild-type virus grown in a continuous cell culture (Vero) system to produce an inactivated whole virus vaccine. Candidate vaccines based on clade 1 and clade 2 influenza H5N1 strains, produced at a variety of manufacturing scales, were demonstrated to be highly immunogenic in animal models without the need for adjuvant. The vaccines induce cross-neutralising antibodies and are protective in a mouse challenge model not only against the homologous virus but against other H5N1 strains, including those from other clades. These data indicate that cell culture-grown, whole virus vaccines, based on the wild-type virus, allow the rapid high-yield production of a candidate pandemic vaccine.


1982 ◽  
Vol 214 (1196) ◽  
pp. 289-303 ◽  

Established biotechnologies overcome cost handicaps, particularly aqueous process dilution, through unique advantages. Ancient fermen­tations confer psychopharmacological, palatable or nutritional qualities on drinks and foods. Modern biotechnologies depend on bacterial versa­tility (sewage disposal), enzyme specificity (hydrolases), high value of complex products (antibiotics, vaccines), chirality (amino acids), high yield (citric acid), or, rarely, process intensity (glucose isomerase). Advances in recombinant DNA have already given valuable human proteins. Numerous new targets include hormones, blood proteins and antibodies. Production techniques will include cell fusion and animal cell culture, and new hosts, some eukaryotic, for human genes. Enhanced production of cells, organelles and enzymes will follow, partly to take advantage of the industrial potential of immobilization. Later still, improved engineering and new biological processes should allow competitive production of fine chemicals, protein and other foods, bulk chemicals and fuels. Some products will require simultaneous change and advance in agriculture: interspecific genetic manipulation, plant cell culture and other modern developments will facilitate these.


1986 ◽  
Vol 9 (4) ◽  
pp. 205-210
Author(s):  
U. Lindskog ◽  
B. Lundgren ◽  
I. Wergeland ◽  
D. Billig

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