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sonumlhamo新蟲 (小有名氣)
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[求助]
關(guān)于代謝的文獻(xiàn)里面的一小段,求大俠幫忙翻譯,對(duì)代謝方面是一點(diǎn)都不知道呀~
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Glucans are microbial cell wall carbohydrates that are shed into the circulation of patients with infections. Glucans are immunomodulatory and have structures that are influenced by bacterial or fungal species and growth conditions. We developed a method to covalently label carbohydrates with a fluorophore on the reducing terminus, and used the method to study the pharmacokinetics following intravenous administration of three highly purified and characterized glucans (glucan phosphate, laminarin and scleroglucan) that varied according to molecular size, branching frequency and solution conformation. Elimination half-life was longer (3.8 F 0.8 vs. 2.6 F 0.2 and 3.1 F 0.6 h) and volume of distribution lower (350 F 88 ml/kg vs. 540 F 146 and 612 F 154 ml/kg) for glucan phosphate than for laminarin and scleroglucan. Clearance was lower for glucan phosphate (42 F 6 ml/kg h) than for laminarin (103 F 17 ml/kg h) and scleroglucan (117 F 19 ml/kg h). Since plasma levels at steady state are inversely related to clearance, these differences suggest that pharmacokinetics could favor higher blood levels of glucans with certain physicochemical properties. |
金蟲 (著名寫手)
| 葡聚糖是脫落到感染患者血液循環(huán)系統(tǒng)中的微生物細(xì)胞壁碳水化合物。葡聚糖有免疫調(diào)節(jié)作用并具有受細(xì)菌或真菌以及生長條件影響的結(jié)構(gòu)。我們開發(fā)了一種用一個(gè)熒光團(tuán)于還原末端上對(duì)碳水化合物進(jìn)行共價(jià)標(biāo)記的方法,并且運(yùn)用這種方法跟蹤三種根據(jù)分子大小、分支頻次和溶液構(gòu)象而不同的高度提純并表征的葡聚糖(磷酸葡聚糖、昆布多糖和硬葡聚糖)的靜脈給藥進(jìn)行了藥代動(dòng)力學(xué)研究。與昆布多糖和硬葡聚糖相比,磷酸葡聚糖的消除半衰期更長(3.8 F 0.8對(duì)比2.6 F 0.2和3.1 F 0.6小時(shí))并且分布容積更小350 F 88 ml/kg對(duì)比540 F 146和612 F 154ml/kg)。與昆布多糖(103 F 17ml/kg h和硬葡聚糖(117 F 19ml/kg h)相比,磷酸葡聚糖(42 F 6ml/kg h)的消除率更低。穩(wěn)定狀態(tài)的血漿水平與消除率是逆相關(guān)的,這種差異表明藥代動(dòng)力學(xué)更傾向于較高血中濃度的具有某些物化特性的葡聚糖。 |
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