Purification of capsular polysaccharide from Neisseria meningitidis serogroup C by liquid chromatography
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- 作者：Tâ ; nia Pinheiro Pato ; Antonio de Pá ; dua R. Barbosa and José ; Godinho da Silva Junior
- 关键词：Neisseria meningitidis ; Capsular polysaccharide ; Purification by liquid chromatography
- 刊名：Journal of Chromatography B, Analytical Technologies in the Biomedical and Life Sciences
- 出版年：2006
- 出版时间：7 March 2006
- 年：2006
- 卷：832
- 期：2
- 页码：262-267
- 全文大小：141 K
文摘
Neisseria meningitidis serogroup C capsular polysaccharide (MenCPS) is an important antigen against meningococcal infection. This paper describes a new purification methodology employing liquid chromatography that resulted in a polysaccharide showing the characteristics recommended by the World Health Organization for vaccine purposes. In this method, steps of the traditional procedure that yield low recovery and use toxic materials were modified. The present process consists in the following steps: (1) continuous flow centrifugation of the culture for removal of the cells; (2) supernatant concentration by tangential filtration (100 kDa cutoff); (3) addition of 0.5 % DOC, heating to 55 °C during 30 min and tangential filtration (100 kDa cutoff); (4) anion exchange chromatography (Source 15Q) and (5) size exclusion chromatography (Sepharose CL-4B). The polysaccharide C fraction obtained in that way was dialyzed and freeze-dried. The structural identity of the polysaccharide was demonstrated by 1H-NMR spectrometry.