Microheterogeneity in frozen protein solutions.
Microheterogeneity in frozen protein solutions.
复制标题
冷冻蛋白质溶液中的微观异质性。
DOI:
10.1016/j.ijpharm.2015.04.032
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发表时间:
2015
影响因子:
5.8
通讯作者:
Aksan,Alptekin
中科院分区:
文献类型:
--
作者:
Twomey,Alan;Kurata,Kosaku;Nagare,Yutaka;Takamatsu,Hiroshi;Aksan,Alptekin
In frozen and lyophilized systems, the biological to be stabilized (e.g. therapeutic protein, biomarker, drug-delivery vesicle) and the cryo-/lyo-protectant should be co-localized for successful stabilization. During freezing and drying, many factors cause physical separation of the biological from the cryo-/lyo-protectant, called microheterogeneity (MH), which may result in poor stabilization efficiency. We have developed a novel technique that utilized confocal Raman microspectroscopy in combination with counter-gradient freezing to evaluate the effect of a wide range of freezing temperatures (−20 <TF< 0 °C) on the MH generated within a frozen formulation in only a few experiments. The freezing experiments conducted with a model system (albumin and trehalose) showed the presence of different degrees of MH in the freeze-concentrated liquid (FCL) in all solutions tested. Mainly, albumin tended to accumulate near the ice interface, where it was physically separated from the cryoprotectant. In frozen 10 wt% trehalose solutions, heterogeneity in FCL was relatively low at anyTF. In frozen 20 wt% trehalose solutions, the optimum albumin to trehalose ratio in the FCL can only be ensured if the solution was frozen within a narrow range of temperatures (−16 <TF< −10 °C). In the 30 wt% trehalose solutions, freezing within a much more narrow range (−12 <TF< −10 °C) was needed to ensure a fairly homogeneous FCL. The method developed here will be helpful for the development of uniformly frozen and stable formulations and freezing protocols for biological as MH is presumed to directly impact stability.
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影响因子:
7.4
作者:
Shen, YF;Jacobs, JM;Tompkins, RG
通讯作者:
Tompkins, RG
影响因子:
2.7
作者:
J. Crowe;T. J. Anchordoguy;J. Carpenter;S. H. Loomis;L. Crowe
通讯作者:
L. Crowe
影响因子:
1.8
作者:
C. Körber;M. Scheiwe
通讯作者:
M. Scheiwe
影响因子:
2.7
作者:
E. Shalaev;A. Kanev
通讯作者:
A. Kanev
DOI:
10.1016/s0017-9310(83)80179-3
发表时间:
1983-01-01
影响因子:
5.2
作者:
KORBER, C;SCHEIWE, MW;WOLLHOVER, K
通讯作者:
WOLLHOVER, K