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3H-TdR

3H-TdR的相关文献在1989年到2015年内共计69篇,主要集中在肿瘤学、基础医学、原子能技术 等领域,其中期刊论文69篇、专利文献393175篇;相关期刊50种,包括中国中医基础医学杂志、中药药理与临床、中华实用中西医杂志等; 3H-TdR的相关文献由203位作者贡献,包括苏燎原、朱寿彭、等等。

3H-TdR—发文量

期刊论文>

论文:69 占比:0.02%

专利文献>

论文:393175 占比:99.98%

总计:393244篇

3H-TdR—发文趋势图

3H-TdR

-研究学者

  • 苏燎原
  • 朱寿彭
  • 蔡勇
  • 谢文
  • 谢艳
  • 龚曼丽
  • 刘克良
  • 刘玉龙
  • 刘芬菊
  • 期刊论文
  • 专利文献

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    • 杨晶; 郭丽; 徐军; 杨淑琴
    • 摘要: Objective To explore the distribution and radiation doses of organically bound tritium (OBT) on the organisms and to provide the experimental data for the blood quality and health of the blood donors who have the close contact with tritium. Methods Biological kinetics of 3H-TdR were measured using a liquid scintillation counter after 3H-TdR injection into the mice, and the absorbed doses and dose conversion factors of the organs in the mice were estimated. Results The 3H-TdR was rapidly distributed to organs and reached to peak on day 0.5 to 1 after injection of 3H-TdR into the mice. Then it was cleaned from these organs quickly. The regression equations of 3H-TdR residence curve of the tissues and organs were exponential function equations. According to radioactivity of tissue and organ mass per gram (MBq/g), 3H-TdR was mostly distributed to spleen, thymus, femur, liver and small intestine 1 day after injection. The higher absorbed doses of 3H-TdR were blood, kidney, liver, lung, testicle, brain and heart in turn. The retention is lowest in each organs 16 days after injection, but the accumulative absorbed doses were higher in the organs. The accumulative absorbed dose in spleen and thymus were 9.9 and 8.3 mGy respectively, which were much higher than other organs. The converting factors of absorbed doses (Gy•Bq-1•g) in the organs were increased gradually with the time. Conclusion The radioactivity and absorption dose of peripheral blood were the largest in early stage of 3H-TdR pollution. The absorbed dose of the thymus and spleen reached the peak with the time extension. These results suggest that the peripheral blood and immune organs were the main target organs for 3H-TdR internal pollution. It has laid a foundation for the further study of the blood quality and health effect of the blood donors who have close contact with tritium.%目的:探讨有机结合氚内污染在生物体内的分布规律及其吸收剂量,为评价密切接触氚的献血者的血液质量和健康提供基础资料。方法氚标记胸腺嘧啶核苷(3H-TdR)经动物尾静脉注入,应用均相液体闪烁示踪技术,测量不同时间各组织器官的放射性活度,估算其吸收剂量,并导出各器官吸收剂量转换因子。结果进入血液的3H-TdR可迅速分布于各组织器官,注后0.5~1 d内器官吸收达高峰,然后迅速排除,各组织器官3H-TdR滞留曲线的回归方程为指数函数方程。注后1 d,按单位组织器官质量的放射性活度(MBq/g)计,3H-TdR主要分布于脾脏、胸腺、股骨、肝脏和小肠;吸收剂量较大的组织器官为外周血、肾脏、肝脏、肺、睾丸、脑和心脏。注后16 d,3H-TdR在各组织器官的滞留量均较低,而累积吸收剂量则增高,脾脏和胸腺的累积吸收剂量远大于其它组织器官,分别为9.9和8.3 mGy。吸收剂量转换因子(Gy•Bq-1•g)随时间延长不断增大。结论3H-TdR内污染早期外周血放射性活度和吸收剂量最大,随时间的延长脾脏和胸腺的吸收剂量达高峰,表明外周血和免疫器官是3H-TdR内污染作用的主要组织器官,为进一步研究其对献血者血液质量和健康的影响奠定了基础。
    • 李经伦; 吕英姿; 何晓英; 冯善伟; 张成
    • 摘要: Objective:To study the cellular toxicity of 3H-TdR in labeling mesenchymal stem cells (MSCs). Methods: Different dosage of 3H-TdR was added to the culture bottles. The growth curves of BMSC in different concentrations were made, the apoptosis of cell was observed by Hochest stain and the cell cycle was observed with flow cytometer. The cell surface marks of MSCs( CD29,CD166,CD44,CD45) were detected by flow cytometer and the influence on SOD or MDA level was observed. Results: The researches showed that MSCs growth was suppressed at 4μCi/2ml concentration of 3H-TdR. High concentration of 3H-TdR caused MSCs to be arrested at the S and G2-M stage; MSCs showed obvious apoptosis when the concentration of 3H-TdR exceeded 3μCi/2ml;SOD decreased,MDA increased and their changes were in proportion to the alteration of concentration of 3H-TdR. The proliferation ability of successive progeniture was not affected by 3H-TdR when its concentration didn't exceed 1μCi/2ml. Conclusion: Higher concentration of 3H-TdR can arrest cell cycle of stem cell,affect its growth and tracer function,but concentration lower than 1μCi/2ml has no effect on biological characteristic of stem cell.Therefore it is safe for tracing study.%  目的:研究不同剂量的3H-TdR对骨髓间充质干细胞生长代谢的影响,以确定安全的3H标记剂量。方法:在骨髓间充质干细胞培养瓶加入不同浓度的3H-TdR,描绘各细胞生长曲线,用Hochest染色观察细胞凋亡情况及用流式细胞仪检测细胞周期和骨髓间充质干细胞特有细胞表面标志物CD29、CD166、CD44、CD45的变化,观察对干细胞SOD、MDA的影响。结果:研究发现以4μCi/2ml浓度的3H-TdR标记干细胞时干细胞生长受到抑制,3μCi/2ml以上的浓度细胞均有不同程度的凋亡,流式细胞仪发现高浓度的核素能使干细胞被阻滞在S期及G2-M期,而且其细胞内的SOD下降及MDA升高,上述变化都有随核素剂量变化而变化的趋势;而用1μCi/2ml和正常组差异无统计学意义(P>0.05),标记过的骨髓间充质干细胞连续传代培养其增殖能力不受影响。结论:较高浓度的3H-TdR对干细胞的培养、示踪有影响,而1μCi/2ml的3H-TdR进行示踪研究是安全的。
    • 陈雷; 林建华; 吴朝阳
    • 摘要: 目的 探讨骨髓基质干细胞复合Ⅰ型胶原海绵对兔膝关节浅层大面积软骨缺损的修复作用;观察3H-TdR对骨髓基质干细胞的示踪作用.方法 骨髓基质干细胞复合组织工程支架Ⅰ型胶原海绵,植入修复兔膝关节大面积浅层软骨缺损模型,分别于术后4、12、24周取材,观察修复效果;运用3H-TdR标记骨髓基质干细胞,同法植入软骨缺损区,分别于术后4、12、16及24周取材,液体闪烁计数定量分析、乳胶封片、4周后显影定性分析.结果 实验组术后4周缺损表面未见明显的新生软骨形成;12周,缺损表面有少量的新生软骨形成;24周,缺损表面的新生软骨较4、12周的新生软骨明显,仍存在部分缺损尚未修复.对照组则均未见明显的修复.修复组织的细胞核内均有放射活性,与对照组比较,差异均有统计学意义(P<0.05),提示修复组织的细胞来源为体外移植的细胞,而非自体细胞,至术后24周,植入的细胞仍然存活.结论 该方法对兔膝关节软骨缺损具有修复作用,但不能完全修复;所修复组织的细胞来源为植入的骨髓基质干细胞;3H-TdR标记对骨髓基质干细胞具有较好的长期示踪作用.%Objective To investigate the feasibility of repairing the whole layer cartilage defects of lateral tibial plateau of rabbits by implanting bone marrow-derived mesenchymal stem cells (BMSCs) and human placenta collagen Ⅰ -sponge,and to track BMSCs labeled by 3 H-TdR.Methods Bone marrow aspirate of rabbits was cultured and expanded to the 3rd passage,mixed with human placenta collagen Ⅰ- sponge and transplanted to the whole layer cartilage defects of adult rabbit in lateral tibial plateau.The repair results were observed after 4,12 and 24 weeks.BMSCs P3 were labeled with 3 H-TdR,and transplanted by using the same method.Results Nearly no obvious neo-cartilage formed 4 weeks after operation,little neo-cartilage formed 12 weeks after operation,more obvious neo-cartilage formed at 24th week than at 4th and 12th week after operation.At 24th week postoperation,the surface was smooth,but partial defects still existed.No obvious repair evidence was found on the surface of the control group.Radioactivity existed in all repair tissue.There was significant difference between experimental group and control group (P <0.05).After 24 weeks,the implanted cells were still alive.Conclusion The tissue-engineering cartilage by this method can repair the defects of the whole layer cartilage defects of lateral tibial plateau of rabbits,but it can not repair the defects completely.The resource of the repaired tissue is implanted BMSCs.3 H-TdR labeling is a good tracing of implanted BMSCs in long-term observation.
    • 吴瑕
    • 摘要: 目的:探讨生长激素促进肝癌细胞Bel-7402的增值.方法:用放射性配体法了解GHR在Bel-7402肝癌细胞株的表达情况.分别采用肿瘤细胞计数、噻唑蓝比色法和集落形成实验来了解噻唑蓝比色法和集落形成实验肝癌细胞株在不同浓度的rhGH作用下的药物敏感性,计算细胞生长率和集落形成率.而且用3H-TdR深入法来了解肿瘤细胞DNA的代写情况.结果:放射配体法发现了3H-TdR肝癌细胞可以表达GHR,rhGH对体外培养的3701肝癌细胞的生长有某种程度的刺激作用,rhGH在100ng/mL的浓度的时候可以促进肝癌细胞的增殖比较显著,而rhGH在其它浓度的时候的部分时段,对肝癌细胞的增殖也能表现一定的促进作用,但是总体效果比较rhGH在100ng/mL浓度的时候为弱.结论:一定浓度范围的rhGH对3701肝癌细胞的增殖有促进的作用,发生这个的原因可能与肝癌细胞能够表达GHR有关系.
    • 万建美; 张友九; 范我; 朱然; 宁萍; 崔凤梅
    • 摘要: Objective To compare the incorporation method of 3H-TdR and 125Ⅰ-UdR on determining the proliferation effect of lymphocytes. Methods The proliferation effects of lymphocyte and Daudi lymphoma cells were estimated by 3H-TdR and 125Ⅰ-UdR incorporation. Results The incorporating fraction of 3H-TdR and 125Ⅰ-UdR into lymphocyte was 20.95% ± 1.06% and 1.00% ±0.04%,respectively, and the incorporating fraction for the lymphoma cells was 29. 94% ± 4. 10% and 6. 02% ±0. 73% ,respectively. The incorporation fractions of 3H-TdR into lymphocyte and lymphoma cells were much higher than those of 125Ⅰ-UdR, but the incorporating fractions of 3H-TdR or 125Ⅰ-UdR into the lymphoma cells were much higher than those of lymphocytes. Conclusions For lymphocytes, 125Ⅰ-UdR cannot substitute 3H-TdR as a tracer agent. But for lymphoma cells, whether 125Ⅰ-UdR could be replace 3H-TdR or not needs further research.%目的 比较3H-TdR与125Ⅰ-UdR掺入淋巴细胞的增殖效应.方法 用3H-TdR与125Ⅰ-UdR掺入法测定淋巴细胞和Daudi淋巴瘤细胞的增殖效应.结果 3H-TdR和125Ⅰ-UdR在正常淋巴细胞中的掺入率分别为20.95%±1.06%和1.00%±0.04%,在Daudi淋巴瘤细胞中的掺入率分别为29.94%±4.10%和6.02%±0.73%.3H-TdR在细胞中的掺入率明显高于125Ⅰ-UdR;且3H-TdR和125Ⅰ-UdR在淋巴瘤细胞中的掺入率高于正常淋巴细胞.结论 就淋巴细胞而言,作为示踪剂125Ⅰ-UdR不能替代3H-TdR;但对于淋巴瘤细胞,能否代替3H-TdR有待于进一步研究.
    • 谢文; 马克昌; 谢艳; 朱太咏; 冯坤
    • 摘要: 目的:研究益气活血法对骨折断端细胞活性的影响。方法:用3H-TdR和3H-UR标记方法,测定小鼠骨折后36h和第5天骨折端和对侧DNA和RNA合成活性及RNA的含量,并观察益气生骨冲剂对骨折断端细胞活性的影响。结果:创伤骨折使DNA和RNA合成活性受到不同程度的抑制,RNA的含量有所降低;益气生骨冲剂组DNA和RNA合成活性明显提高,RNA含量有所增加,以骨折侧尤甚。结论:益气生骨冲剂的益气活血作用明显促进了骨折断端细胞的增殖和合成活性。
    • 肖荣冬; 翁国星
    • 摘要: 目的 采用新方法研究天然生物支架材料胶原/透明质酸膜,明胶海绵的细胞相容性.方法 应用WST-1法测定平滑肌细胞与材料的粘附率,增殖力,3H-TDR掺入法测定DNA合成率,BrdU细胞标记免疫组化鉴定,分析组织工程生物支架材料的细胞相容性.结果 WST-1法测定,3H-TDR掺入法测定DNA合成率,BrdU细胞标记结果表明:胶原/透明质酸膜与平滑肌细胞的粘附率最高,细胞的增殖和代谢状况较好,明胶海绵较低.结论 应用WST-1法测定,3H-TDR掺入法测定DNA合成率,BrdU细胞标记方法研究细胞相容性方法简便可行;天然复合生物材料胶原/透明质酸膜具有较理想的细胞相容性.
    • 赵燕凌; 陈跃; 范旗; 何菱; 李举联
    • 摘要: 目的 观察99mTc-DTPA-DG对人乳腺癌MCF-7细胞DNA合成的影响,探讨99mTc-DTPA-DG作为一种分子显像剂评价肿瘤的疗效.方法 采用一步法合成99mTc-DTPA-DG,培养人乳腺癌MCF-7细胞,分别加入不同浓度的DTPA-DG、FDG和DG(每毫升生理盐水中分别加入DTPA-DG、FDG和DG为5mg,25 mg及50 mg),干预24 h后,掺入3H-TdR6 h,检测3种药物是否参与人乳腺癌MCF-7细胞DNA的合成,比较不同的浓度下细胞的摄取率,以及不同药物对细胞增殖的影响.结果 DTPA-DG及DG均掺入人乳腺癌MCF-7细胞的增殖,DTPA-DG组摄取率高于DG组和FDG组(n=4,P<0.00),且浓度为0.5 mg时3H-TdR摄取率最高.FDG随着时间的延长和浓度的升高,摄取率逐渐下降,可能不掺入细胞核或者产生了细胞毒性.结论 99mTc-DTPA-DG能够参与肿瘤细胞的增殖,反映细胞核的活性,可以作为一种分子显像剂评价肿瘤的疗效.
    • 张宏方; 金志甲; 李军; 张瑛; 胥冰
    • 摘要: 目的研究小鼠胸膜间皮细胞培养上清(MPMS)对脾细胞生长与功能的影响。方法取BALB/c小鼠胸膜组织块直接培养和用胰蛋白酶消化后培养胸膜间皮细胞。于培养的不同时间,取MPMS对ConA刺激脾细胞的增殖,采用3H-TdR掺入法测定。结果直接培养法收集的MPMS-A分别以1∶1及1∶10的比例稀释时,对脾细胞自发掺入3H-TdR的增殖均具有明显地抑制作用,与对照组(培基+脾细胞,MS)相比较差异显著(P<0.05-0.001);用胰蛋白酶消化收集的培养3 d的MPMS-B,在1∶1稀释度时,对小鼠脾细胞的增殖具有促进作用(P<0.05-0.01)。而培养3 d收集的MPMS-B,作1:10的比例稀释时,其对ConA刺激的脾细胞增殖反应具有促进作用,与对照组(MS+ConA)相比较差异显著(P<0.01)。结论胸膜细胞培养上清对脾细胞增殖呈双向作用影响,而抑制作用大于增强作用。可为研究中医藏像理论与免疫的关系提供基础研究依据。
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