脂质是生物体的重要组成成分,参与细胞膜流动、神经递质传递和运输以及能量供应等多个过程。研究表明,癌细胞为了适应不断变化的生物微环境和快速增殖的需求,其脂质代谢过程不同于正常细胞。因而,对脂质组分进行快速检测、识别及监测研...脂质是生物体的重要组成成分,参与细胞膜流动、神经递质传递和运输以及能量供应等多个过程。研究表明,癌细胞为了适应不断变化的生物微环境和快速增殖的需求,其脂质代谢过程不同于正常细胞。因而,对脂质组分进行快速检测、识别及监测研究,对了解生命过程、监测诊疗过程变化、提升诊疗效率等具有重要意义。质谱是直接获取分子结构最有效的手段之一,在生物分子及脂质鉴定中具有独特优势。近年来,常压质谱技术(ambient mass spectrometry,AMS)不断涌现,该技术无需样品预处理,为直接快速脂质识别及监测提供了有效手段。软电离技术的不断发展也为复杂多样的脂质分子检测提供了广阔的发展空间。电喷雾离子化(ESI)作为主要的软电离技术之一,易于离子化中高极性的生物样品,能够满足生物体内大多数脂质的检测需求。因此,研究人员基于ESI技术,开展了广泛的癌症脂质代谢研究,实现了不同脂质的鉴定和相对定量研究。由于脂质存在丰富的异构体,人们又创新性地将各种化学衍生法和其他技术与AMS结合起来,实现了对复杂脂质结构异构体的准确识别和相对定量研究。基于此,本文综述了近5年用于脂质检测的主要常压质谱技术及应用进展,并汇总了质谱解析脂质精细结构的典型策略。展开更多
One novel complex of （）99mTc-salicylidene-tyrosine Schiff base was designed and synthesized, and its biodistribution was investigated. The theoretical simulation revealed that the cis- and trans-（isomers） might co...One novel complex of （）99mTc-salicylidene-tyrosine Schiff base was designed and synthesized, and its biodistribution was investigated. The theoretical simulation revealed that the cis- and trans-（isomers） might co-exist in aqueous solution. A yield higher than 90% under the optimal condition of synthesis was obtained. Good water-solubility was demonstrated. Very little uptakes in muscle, brain, heart and S-180 sarcoma, as well as very rapid blood clearance were revealed in mice. Good accumulation in bone was shown. At 1 h postinjection the bone uptake was 10.9%ID/g. At 3 and 5 h postinjection, bone-to-muscle ratios were 19.0 and 9.3, and bone-to-blood ratios were 31.6 and 28.9, respectively. The result indicates a bone imaging potency of the complex.展开更多
文摘脂质是生物体的重要组成成分,参与细胞膜流动、神经递质传递和运输以及能量供应等多个过程。研究表明,癌细胞为了适应不断变化的生物微环境和快速增殖的需求,其脂质代谢过程不同于正常细胞。因而,对脂质组分进行快速检测、识别及监测研究,对了解生命过程、监测诊疗过程变化、提升诊疗效率等具有重要意义。质谱是直接获取分子结构最有效的手段之一,在生物分子及脂质鉴定中具有独特优势。近年来,常压质谱技术(ambient mass spectrometry,AMS)不断涌现,该技术无需样品预处理,为直接快速脂质识别及监测提供了有效手段。软电离技术的不断发展也为复杂多样的脂质分子检测提供了广阔的发展空间。电喷雾离子化(ESI)作为主要的软电离技术之一,易于离子化中高极性的生物样品,能够满足生物体内大多数脂质的检测需求。因此,研究人员基于ESI技术,开展了广泛的癌症脂质代谢研究,实现了不同脂质的鉴定和相对定量研究。由于脂质存在丰富的异构体,人们又创新性地将各种化学衍生法和其他技术与AMS结合起来,实现了对复杂脂质结构异构体的准确识别和相对定量研究。基于此,本文综述了近5年用于脂质检测的主要常压质谱技术及应用进展,并汇总了质谱解析脂质精细结构的典型策略。
文摘One novel complex of （）99mTc-salicylidene-tyrosine Schiff base was designed and synthesized, and its biodistribution was investigated. The theoretical simulation revealed that the cis- and trans-（isomers） might co-exist in aqueous solution. A yield higher than 90% under the optimal condition of synthesis was obtained. Good water-solubility was demonstrated. Very little uptakes in muscle, brain, heart and S-180 sarcoma, as well as very rapid blood clearance were revealed in mice. Good accumulation in bone was shown. At 1 h postinjection the bone uptake was 10.9%ID/g. At 3 and 5 h postinjection, bone-to-muscle ratios were 19.0 and 9.3, and bone-to-blood ratios were 31.6 and 28.9, respectively. The result indicates a bone imaging potency of the complex.
