高原肺水肿治疗前后血浆血栓素和前列环素的变化

目的：探讨高原肺水肿９ＨＡＰＥ）患者血浆内皮源性血管活性物质血栓素Ｂ２（ＴＸＢ２）及６－酮－前列腺素Ｆ１α（６－Ｋｅｔｏ－ＰＧＦ１α）浓度变化及其临床意义。方法：在海拔３７００ｍ处我高原肺水肿患者治疗前和临床治愈后用放射免疫分析法测定血浆血栓素Ｂ２（ＴＸＢ２）和６－酮－前列腺素Ｆ１α（６－Ｋｅｔｏ－ＰＧＦ１α）的含量变化。     

蛛网膜下腔药物灌注治疗对脊髓损伤后TXA2／PGI2变化的影响

目的：研究蛛网膜下腔灌注地塞米松和维拉帕米对脊髓损伤（ＳＣＩ）后血栓素Ａ２（ＴＸＡ２）和前列腺素（ＰＧＩ２）变化的影响．方法：用Ａｌｅｎ法制作ＳＣＩ模型，放免法检测脊髓打击部位的ＴＸＢ２和６－酮－前列腺素Ｆ１α（６－Ｋｅｔｏ－ＰＧＦ１α）含量，同时行病理学检查．结果：药物灌注治疗显著降低了血栓素Ｂ２（ＴＸＢ２）含量和ＴＸＢ２／６－Ｋｅｔｏ－ＰＧＦ１α比值，使６－Ｋｅｔｏ－ＰＧＦ１α含量相对升高，并减轻了脊髓损伤程度．结论：蛛网膜下腔灌注地塞米松和维拉帕米治疗具有防止ＳＣＩ后ＴＸＡ２／ＰＧＩ２平衡紊乱作用，从而改善脊髓血流，促进神经功能的恢复．     

低强度He－Ne激光血管内照射对冠心病患者血小板活性的影响

为探讨低强度Ｈｅ－Ｎｅ激光血管内照射（简称ＩＬＬＬＩ）在临床应用上的理论根据，对６０例不同类型冠心病（ＣＨＤ）患者进行低强度Ｈｅ－Ｎｅ激光血管内照射，观察反映血小板功能指标的血浆血栓素Ｂ２（ＴＸＢ２）、ＴＸＢ２／６－酮前列腺素Ｆ１α（ＴＸＢ２／６－ｋｅｔｏ－ＰＧＦ１α）和血小板膜颗粒糖蛋白（ＧＭＰ－１４０）的变化，并将同期口服阿司匹林治疗的１８例急性心肌梗塞（ＡＭＩ）患者的诸指标与其比较，结果显示ＩＬＬＬＩ治疗后ＡＭＩ组和不稳定性心绞痛组的血浆ＴＸＢ２／６－ｋｅｔｏ－ＰＧＦ１α及ＧＭＰ－１４０均显著降低，而阿司匹林治疗的ＡＭＩ患者血浆ＴＸＢ２及ＴＸＢ２／６－ｋｅｔｏ－ＰＧＦ１α虽也下降，但ＧＭＰ－１４０无明显变化，提示ＩＬＬＬＩ抑制血小板活化的功能超过阿司匹林。     

肺心病患者血浆中栓素B2,6—酮—前列素F1a,环磷腺苷,环磷鸟…

对３０例慢性肺心病患者观察血浆中血栓素Ｂ２（ＴＸＢ２）、６－酮－前列腺素Ｆ１ａ（６－ＫＰＧＦ１ａ）、环磷腺苷（ｃＡＭＰ）、环磷鸟苷（ｃＧＭＰ）与血流动力学、缺氧的变化及用消心痛治疗后的关系。结果：（１）慢性肺心病患者血浆ＴＸＢ２水平明显高于健康对照组，血浆６－ＫＰＧＦ１ａ水平明显低于对照组；肺动脉平均压（Ｐｐａ）与６－ＫＰＧＦ１ａ呈负相关，Ｐｐａ与ＴＸＢ２、ＴＸＢ２／６－ＫＰＧＦ１ａ呈正相关。（２     

高原对大鼠血浆与组织6—Keto—PGF1α和TXB2含量的影响及丹参的保护…

为观察高原对大鼠血浆组织６－Ｋｅｔｏ－ＰＧＦ１α和ＴＸＢ２含量的影响及丹参的保护作用。采用３Ｈ－ＴＸＢ２及３Ｈ－６－Ｋｅｔｏ－ＰＧＦ１α药盒及方法。结果：平原大鼠进入海拔４４７５ｍ高原后，其心、肝、脾脏组织及血栓素Ｂ２（ＴＸＢ２）含量显著升高（Ｐ〈０．０５）；心脏和血浆中６－酮－前列素Ｆ１α（６－Ｋｅｔｏ－ＰＧＦ１α）含量则显著降低（Ｐ〈０．０１）；各项Ｔ／Ｋ比值均显著增大（Ｐ〈０．０１），丹参合     

脑卒中患者内皮源性血管活性物质与局部脑血流量的关系

目的 探讨急性脑卒中患者血浆内皮源性血管活性物质内皮素（ＥＴ）、血栓素Ｂ２（ＴＸＢ２）、６－酮－前列腺素Ｆ１α（６－Ｋ－ＰＧＦ１α）浓度变化及其与局部脑血流量（ｒＣＢＦ）的关系。方法 应用放射免疫分析法测定６４例脑卒中患者和３０例正常对照者的血浆ＥＴ、ＴＸＢＷ、６－Ｋ－ＰＧＦ１α浓度,并同步应用＾１３３Ｘｅ吸入法测定ｒＣＢＦ。结果 脑卒中患者血浆ＥＴ含量为（１０３．８±４２．６）ｎｇ／Ｌ、ＴＸＢ２     

偏头痛飞行员血浆神经递质和调质的变化

对３２例无先兆型偏头痛的男性飞行员进行血浆血管紧张素Ⅱ（ＡＴＤ－Ⅱ）、强啡肽（ＤＹＮＡ）、Ｐ物质（ＳＰ）、６－酮前列环素（６－ｋｅｔｏ－ＰＧＦ１）、血栓素Ｂ２（ＴＸＢ２）含量的测定，并与３０例健康飞行员对照。结果显示偏头痛组血浆ＡＴ－Ⅱ、ＴＸＢ２升高，６－ｋｅｔｏ－ＰＧＦ１降低，发作期ＤＹＮＡ降低，ＳＰ升高，与对照组比较均Ｐ＜０．０５或０．０１，而间歇期ＤＹＮＡ、ＳＰ无变化。表明偏头痛发作与神经内分泌失调有关，ＡＴ－Ⅱ升高提示肾素－血管紧张素系功能亢进；ＳＰ升高，ＤＹＮＡ降低提示与痛阈降低和对疼痛敏感有关；ＴＸＢ２升高、６－ｋｅｔｏ－ＰＧＦ１．降低表明其血管、血小板功能异常。     

冻伤大鼠血浆中前列环素与血栓素含量的变化

报道了冻伤对大鼠血浆中前列环素和血栓素（ＴＸＡ２）的代谢产物６－ｋｅｔｏ－ＰＧＦ１α（Ｐ）和ＴＸＢ２（Ｔ）含量的影响。冻伤后大鼠血浆中６－ｋｅｔｏ－ＰＧＦ１α和ＴＸＢ２含量均发生明显改变，其改变程度与冻伤程度有密切关系；重度冻伤组直至冻后７ｄ，血浆中Ｔ／Ｐ比值仍显著高于正常对照组。表明冻伤可使血管内皮细胞和血小板的正常生理功能受到影响，血浆液固性增加导致血液循环障碍最终引起局部组织坏死。     

低强度He—Ne激光血管内照射对冠心病患者血小板活性的影响

为探讨低强度Ｈｅ－Ｎｅ激光务管内照射在临床应用上的理论根据，对６０例不同类型冠心病患者进行低强度Ｈｅ－Ｎｅ激光血管内照射，观察反映血小板功能指标的血浆血栓素Ｂ２９ＴＸＢ２），ＴＸＢ２／６－酮前列腺素Ｆ１α（ＴＸＢ２／６－ｋｅｔｏ－ＰＧＦ１）和血小板膜颗粒糖蛋白的变化，并将同期口服阿司匹林治疗的１８例急性心肌梗塞患者的诸指标与其比较，结果显示ＩＬＬＬＩ治疗后，ＡＭＩ组和不稳定性心绞痛组的血浆ＴＸＢ２     

健康人多极运动中血浆TXB_2、6-K-PGF_(1a)的变化

观察了Ｂｒｕｃｅ运动试验对２８名年轻健康人血浆血栓素Ｂ２（ＴＸＢ２）、６－酮－前列腺素（６－Ｋ－ＰＧＦ１ａ）的影响。结果表明：Ｂｒｕｃｅ试验进行１２分钟时与试验前、试验６分钟时比较，ＴＸＢ２显著升高（ｐ＜０．０１）；试验停止后８分钟时与运动１２分钟时比较，血浆ＴＸＢ２显著下降（ｐ＜０．０１）。６－Ｋ－ＰＦ１ａ在１２分钟运动试验内变化不明显，但在试验停止后８分钟却显著升高（ｐ＜０．０１）。结论：多极运动可致血浆ＴＸＢ２、６－Ｋ－ＰＧＦ１ａ升高。这可能是运动防治高血压的机理之一。     

2-CAT: 2-concentric arc technique

We used conventional three-dimensional (3D) planning software and blocking to design a radiation dose distribution in the shape of a hollow sphere. The technique, known as 2-CAT, employs arcing beams with blocking of the center of the field, along with partial transmission blocking of the poles of the portal. The central core can subsequently be irradiated to deliver a relatively even dose to the entire volume. The technique differs from conventional planning in that the central portion of the tumor, while surrounded, is not included in the initial treatment volume. The clinical usefulness of the method will require future testing, as the technique has not yet been clinically proven..     

T—2四醇和T—2五醇的制备

目的：进一步探讨Ｔ－２毒素与其结构效应的关系，制备Ｔ－２毒素的两个衍生物。Ｔ－２和Ｔ－２五醇。     

Synthesis of no-carrier-added fluorine- 18 2-fluoro-2-deoxy-D-glucose

A new synthetic procedure for the preparation of fluorine- 18 2-fluoro-2-deoxy-glucose has been developed. This procedure offers the advantages of flexibility in the source of the fluorine- 18, high yields, and short synthesis times. The procedure works at the no-carrier-added level and gives a product of very high specific activity.     

VO2 responses to running speeds above VO2max

This study compared VO2, heart rate (HR) and electromyographic (iEMG) responses to speeds above the velocity associated with VO2max (v-VO2max). Eight male, middle-distance runners performed a graded exercise test to determine VO2max and v-VO2max and runs to fatigue at 100 % and 110 % v-VO2max. Breath-by-breath VO2 and HR were continuously recorded; lactate [La (-)] measured pre- and post-run and iEMG measures of rectus femoris (RF) and vastus lateralis were recorded during the first and last 20 s of each run. Analysis indicated longer time to fatigue in the 100 % v-VO2max run with no differences between conditions for VO2 or HR amplitudes or post-run [La (-)] (p > 0.05). There were significantly faster tau values (p < 0.05) in the 110 % condition in VO2 and HR. No significant correlations were observed between VO2 or HR tau values and time to fatigue. RF iEMG was significantly larger in 110 % compared to 100 % run in the first 20 s (p < 0.05). While no association between treadmill performance and VO2 response was evident, faster running speeds resulted in faster VO2 and HR responses, with no difference in amplitude or % VO2max attained. This may potentially be as a result of an increased muscle fibre recruitment stimulus during the faster running velocity resulting in faster cardiodynamic responses.     

New high-yield synthesis of 18F-labelled 2-deoxy-2-fluoro-D-glucose

A new high-yield synthesis for the production of 18F-2-FDG has been developed by reacting 18F-labelled acetyl hypofluorite, prepared by in situ reaction of 18F-molecular fluorine with sodium acetate in glacial acetic acid, and tri-acetyl-D-glucal at room temperature. Molecular fluorine labelled with 18F was produced by a 20Ne(d, alpha) 18F reaction. 1,3,4,6-tri-O-acetyl-2-deoxy-2-fluoro-D-glucopyranose is extracted with methylene chloride, evaporated to dryness and hydrolyzed, yielding 98% radiochemically pure 18F-2-FDG. Overall radiochemical yield is about 24 +/- 3%. The specific activity of the final product at the end of synthesis is about 25.38 GBq/mmol (685 mCi/mmol). The synthesis time is approximately 60 min. The synthesis proves that small medical cyclotrons are able to produce 18F-molecular fluorine at the levels needed for the synthesis of 18F-2-FDG used in functional imaging with positron emission tomography.