Brain creatine kinase isoenzyme (CK-BB) as a possible biomarker for the diagnosis in vivo of ovine coenurosis in a naturally infected flock

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• 作者：Saverio Paltrinieri ; Antonio Varcasia ; Stefania Cazzaniga ; Alessia Giordano ; Anna Paola Pipia ; Raffaele Marrosu ; Antonio Scala
• 关键词：Creatine kinase (CK) ; Isoenzyme ; Electrophoresis ; Taenia multiceps ; Cerebral Coenurosis ; Sheep
• 刊名：Small Ruminant Research
• 出版年：2010
• 出版时间：November 2010
• 年：2010
• 卷：94
• 期：1-3
• 页码：180-184
• 全文大小：533 K

文摘

To assess the possible role of the “brain isoenzyme” of creatine kinase (CK-BB) as an early diagnostic tools for cerebral coenurosis we examined sera from 68 sheep (10–13 months old) from a flock on which cerebral coenurosis was endemical. After sampling, sheep were slaughtered, and neurological lesions were classified as purulent-necrotic migratory lesions or cystic lesions. The discriminating power of CK-BB to diagnose cerebral coenurosis was assessed using a receiver operating characteristic (ROC) curve.

The prevalence of cerebral coenurosis was 39.7 % (27/68). Migratory lesions were found in 23 sheep (85.1 % ), cystic lesions in 3 sheep (11.2 % ) and both lesions were found in 1 sheep (3.7 % ). The most abundant isoenzymes detected both in controls and in sheep with cerebral coenurosis were CK-MM, Macro-CK2 and CK-BB. No significant differences regarding absolute values of CK-BB were found suggesting that CK-BB is not released in serum during cerebral coenurosis. Conversely, CK-MM was significantly lower (P < 0.05) in sheep with cerebral coenurosis compared with controls, inducing a relative increase of the percentage of CK-BB (P < 0.05). This latter increase had a good discriminating power (area under the ROC curve: 0.71; P < 0.000). Although at its best diagnostic performance (CK-BB higher than 24,4 % ) sensitivity and specificity were moderate (66.7 % and 68.3 % , respectively), the likelihood ratio of increased CK-BB was 2.10. The increased percentage of CK-BB can thus be useful in the diagnostic approach to suspected cases of cerebral coenurosis, when the pre-test probability of disease is high.