^99Tc^m-(HYNIC-BMS-200261)(tricine)--(TPPTS)的制备及对荷乳腺癌裸鼠的显像研究  被引量:3

Preparation of ^99Tc^m-( HYNIC-BMS-200261 ) (tricine) (TPPTS) and its biodistribution and preliminary imaging study in nude mice bearing human breast cancer

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作  者:李环[1] 刘晓建[1] 刘杰[1] 金超岭 王猛[1] 方纬 戴皓洁[3] 颜珏[1] 郑玉民[1] 

机构地区:[1]中日友好医院核医学科,北京100029 [2]中国医学科学院、北京协和医学院阜外心血管病医院核医学科,北京100037 [3]首都医科大学附属北京同仁医院核医学科,100730

出  处:《中华核医学与分子影像杂志》2016年第2期175-179,共5页Chinese Journal of Nuclear Medicine and Molecular Imaging

摘  要:目的 制备^99Tcm-(HYNIC-BMS-200261)(N-三羟甲基甘氨酸)(三苯基膦三间磺酸钠盐)[^99Tcm-(HYNIC-BMS-200261)(tricine)(TPPTS)]三重配位化合物,评价其在正常小鼠及荷乳腺癌裸鼠体内的生物分布,并对荷乳腺癌裸鼠进行初步显像研究。方法 先用双功能螯合剂HYNIC与BMS-200261耦联,再以tricine和TPPTS为协同配体,进行^99Tcm标记,合成三重配位化合物^99Tcm-(HYNIC-BMS-200261)(tricine)(TPPTS),测定其放化纯及稳定性,并进行正常小鼠、荷乳腺癌MDA-MB-435裸鼠体内生物分布实验和荷乳腺癌裸鼠γ显像。结果 ^99Tcm-(HYNIC-BMS-200261)(tricine)(TPPTS)的放化纯〉90%,室温下放置4 h其放化纯仍大于85%。正常小鼠体内分布结果表明,该标记物的血液清除迅速,注射后2 h血液中的放射性摄取值为(0.08±0.02) %ID/g,主要经肝、肾排泄,脾、胃肠道摄取较少,注射后2 h脾、胃、小肠中的放射性摄取值分别为(0.35±0.13)、(0.27±0.11)和(0.25±0.07) %ID/g。荷乳腺癌MDA-MB-435裸鼠在注药后30 min显像即可见肿瘤部位有放射性浓聚影,1 h后T/NT比值最高,达3.40±0.30。结论 ^99Tcm-(HYNIC-BMS-200261)(tricine)(TPPTS)三重配位化合物制备成功,标记方法可行,放化纯高,稳定性好,生物分布特性良好,有望用于乳腺癌显像研究。Objective To synthesize ^99Tc^m-(HYNIC-BMS-200261)(tricine)(trisodium triphenylphosphine-3, 3', 3″-trisulfonate)(^99Tc^m-(HYNIC-BMS-200261)(tricine)(TPPTS)) and evaluate its biodistribution and feasibility of imaging in nude mice bearing human breast cancer xenografts.Methods HYNIC was conjugated to BMS-200261, then tricine and TPPTS were used as coligands for ^99Tc^m-labeling. The radiochemical purity and stability of ^99Tc^m-(HYNIC-BMS-200261) (tricine) (TPPTS) were measured with HPLC. Biodistribution in normal mice and imaging in nude mice bearing MDA-MB-435 breast cancer xenografts were performed respectively.Results The radiochemical purity of ^99Tc^m-(HYNIC-BMS-200261)(tricine)(TPPTS) was over 90%, and remained over 85% after 4 h at room temperature. The biodistribution data in normal mice showed a rapid clearance from blood. The tracer uptake of blood was (0.08±0.02) %ID/g at 2 h postinjection. ^99Tc^m-(HYNIC-BMS-200261)(tricine)(TPPTS) was excreted mainly via the liver and kidneys. There was little radioactivity accumulation in gastrointestinal tract. The tracer uptake of spleen, stomach and small intestine were (0.35±0.13), (0.27±0.11) and (0.25±0.07) %ID/g at 2 h postinjection. Gamma imaging showed the tumor tissue uptake was remarkable at 30 min postinjection, with the maximum T/NT ratio of 3.40±0.30 at 1 h postinjection. Conclusions ^99Tc^m-(HYNIC-BMS-200261)(tricine) (TPPTS) may be easily prepared with high radiochemical purity and stability. The imaging results and biodistribution characteristics suggest it may be promising for the detection of breast cancer.

关 键 词:(HYNIC-BMS-200261)(tricine)-(TPPTS) 同位素标记  放射性核素显像 乳腺癌 小鼠 

分 类 号:R737.9[医药卫生—肿瘤] R730.44[医药卫生—临床医学]

 

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