STRUCTURAL FEATURES OF NONIONIC POLYGLYCOL POLYMER-MOLECULES RESPONSIBLE FOR THE PROTECTIVE EFFECT IN SPARGED ANIMAL-CELL BIOREACTORS

被引：73
作者：
MURHAMMER, DW [1 ]
GOOCHEE, CF [1 ]
机构：
[1] UNIV HOUSTON,DEPT CHEM ENGN,HOUSTON,TX 77204
来源：
BIOTECHNOLOGY PROGRESS | 1990年 / 6卷 / 02期
关键词：
D O I：
10.1021/bp00002a008
中图分类号：
Q81 [生物工程学（生物技术）]; Q93 [微生物学];
学科分类号：
071005 ; 0836 ; 090102 ; 100705 ;
摘要：
The nonionic surfactant Pluronic F‐68 polyol is commonly used to protect cultured animal cells from the detrimental effects of sparging. In this study we investigated the structural features of the Pluronic F‐68 molecule responsible for this protective behavior. Poly(oxyethylene)‐poly(oxypropylene) block copolymer polyols of various molecular weights and percentages of hydrophobe (poly(oxypropylene)), including both Pluronic and reverse Pluronic polyols, were considered. The potential toxicity of these agents was examined in the absence of sparging (i.e., in spinner flasks) by using the attachment‐independent Sf9 insect cell line as a model system. Each polyol resulted in one of three distinct types of behavior in these spinner flask experiments: (1) cells lysed at an exponential rate, (2) inhibition of cell growth (i.e., no net cell growth), or (3) uninhibited cell growth. It was then shown that all of the Pluronic and reverse Pluronic polyols that did not inhibit cell growth provided protection from sparging in the bioreactors used in this study; thus, finding a polyol that protected cells was synonymous with finding one that did not inhibit cell growth. The ability of these polyols to protect animal cells in sparged bioreactors was found to correlate well with the hydrophilic‐lipophilic balance (HLB). Those polyols with the largest HLB values were found to be protective agents. These poly(oxyethylene)‐poly(oxypropylene) polyols were also shown to be more effective protective agents than pure poly(oxyethylene); thus, the presence of the hydrophobe (poly(oxypropylene)) is important in their ability to serve as protective agents. Copyright © 1990 American Institute of Chemical Engineers (AIChE)
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页码：142 / 148
页数：7
相关论文
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