多器官保存液的研究进展(Ⅰ)

本文综述了30年来多器官保存液的基础研究和临床应用的状况及进展。论述了器官保存的关键点。对现有的多器官保存液,包括:组氨酸-色氨酸-α-酮戊二酸溶液、威斯康星大学溶液、高渗枸橼酸盐腺嘌呤溶液、自制长征-1号溶液、Celsior溶液、Euro-Collins溶液、Carolina rinse溶液、St.ThomasⅡ溶液、乳果糖-组氨酸-聚蔗糖溶液、上海多器官溶液及其他器官保存液的成分及其特点进行分析,评估了上述器官保存液对脏器的保存效果,简述了中药在器官保存液中的应用。     

癌症靶向疗法

正常细胞周期进程和细胞分裂被破坏一直被认为是引起癌症发生的主要原因之一。该过程涉及与DNA损伤、癌细胞增殖或凋亡有关的调节因子、肿瘤微环境和应急信号等多个因素构成的复杂网络。和常规的癌症疗法相比，癌细胞分子水平变化方面的研究进展使以功能异常的分子或途径为靶点的靶向疗法呈现良好前录；     

超声波作用下NaBH4/ZrCl4还原9(E)-红霉素肟制备9(S)-红霉胺

9(S)-红霉胺是合成地红霉素和CP-544372的中间体，此化合物可在超声波的作用下利用NaBH4／ZrCl4于室温下还原9(E)-红霉素肟制得，收率为69％，其结构经IR、NMR和MS确证。该方法是制备9(S)-红霉胺的方便、有效的途径。     

急性精神分裂症神经内分泌激发试验研究

目的:研究急性精神分裂症患者中枢五羟色胺(5-HT)的功能状态及其临床意义.方法:对27例急性精神分裂症进行神经内分泌激发试验,以催乳素作为应答指标,对临床症状采用阳性和阴性综合征量表进行评定.结果:催乳素基础水平与健康对照组无显著差异(P＞0.05).激发后的催乳素水平呈增高趋势,且幅度趋于明显,与对照组比较,存在显著差异(P＜0.05.P＜0.01).催乳素基础水平、激发反应值以及曲线下面积与PANSS量表因子及总分之间均未发现明显的相关关系(P＞0.05).结论:急性精神分裂症患者中枢五羟色胺的功能可能更加亢进,但与精神症状之间无明显相关性.     

Effects of GM-CSF, IL-3, and GM-CSG/IL-3 fusion protein on apoptosis of human myeloid leukemic cell line Tf-1 induced by irradiation

AIM: To observe the effects of three cytokines on the apoptosis of Tf-1 cells induced by y irradiation and investigate the relationship between apoptosis and caspase-3 activity. METHODS: Different cytokines GM-CSF, IL-3 and GM-CS/IL-3 fusion protein were added into the irradiated Tf-1 cells. MTT assay, morphology, flow cytometry, and DNA fragmentation assay were used to observe the effects of cytokines on apoptosis. The caspase-3 activity was determined with a fluorocytometer. RESULTS: Irradiated Tf-1 cells showed typical morphological characteristic of apoptosis demonstrated by transmission electron microscopy and were accumulated in G0/G1 phase. In the groups treated with growth factors after irradiation, three cytokines significantly increased the viability rate, distinctly decreased the apoptosis rate and the proportion of DNA fragmentation. When Tf-1 cells were irradiated by y     

异丙酚靶控输注系统研究不同麻醉深度下兔海马c-fos mRNA水平的改变

目的 :研究异丙酚不同麻醉深度对兔脑海马c fosmRNA水平的影响。方法 :30只日本大耳兔 ,随机分为 3组 ,即对照组 ,浅麻醉组 ,深麻醉组。浅麻醉组 ,深麻醉组予以异丙酚靶控输注 (TCI)达到所需麻醉状态 30min后断头处死 ,0～ 4℃分离取脑 ,采用原位杂交法测定海马各区c fosmRNA表达水平。结果 :与对照组比较 ,海马CA1区 ,齿状回(DG)区c fosmRNA表达水平随着麻醉深度的增加而显著升高 (P <0 .0 5 )。海马CA3区未见明显变化。结论 :异丙酚可能通过影响c fosmRNA的表达 ,从而影响随后反应基因的转录而发挥抑制中枢的作用且此作用存在区域性差异。     

手术治疗对阻塞性睡眠呼吸暂停低通气综合征患者夜间微觉醒与心率变异的影响

目的:探讨阻塞性睡眠呼吸暂停低通气综合征(OSAHS)患者微觉醒与心率变异(HRV)的关系及手术后的变化。方法:对54例重度OSAHS患者行手术前后PSG。分析1 h内每个呼吸紊乱相关微觉醒开始前10 s的平均心率(HR)和微觉醒开始后10 s的最高HR比较。同时计算1 h内呼吸紊乱相关微觉醒指数(B-Arl)和脉率升高指数(PRRI)并作相关分析。比较不伴微觉醒事件和伴有微觉醒事件的心率差(△HR)及手术后的影响。结果:微觉醒开始后10 s的最高HR显著高于微觉醒开始前的平均HR,且B-Arl与PRRI呈显著正相关,伴有微觉醒的呼吸事件终止前后△HR显著高于不伴微觉醒的呼吸事件的△HR,手术后患者△HR显著低于术前。结论:B-Arl与夜间HRV相关,提示微觉醒可影响心血管调节功能,频繁的微觉醒是导致心血管疾病的重要原因之一。手术可通过减少微觉醒来减轻患者的心血管损害。     

Nitrogen-doped graphene–poly(hydroxymethylated-3,4-ethylenedioxythiophene) nanocomposite electrochemical sensor for ultrasensitive determination of luteolin

An ultrasensitive luteolin electrochemical sensor was constructed by co-electropolymerization of nitrogen-doped graphene (N-GR) and hydroxymethylated-3,4-ethylenedioxythiophene (EDOT-MeOH) using cyclic voltammetry (CV). Because of the synergistic effects of the large surface area, superior electrical conductivity, and large amount of chemically active sites of N-GR together with the satisfactory water solubility and high conductivity of poly(hydroxymethylated-3,4-ethylenedioxythiophene) (PEDOT-MeOH), the N-GR–PEDOT-MeOH nanocomposite sensor exhibited high electrochemical sensitivity towards luteolin with a wide linear range of 0.005–10.06 μM and low detection limit of 0.05 nM. Satisfactory reproducibility, selectivity, and stability were exhibited by this electrochemical sensor. Additionally, the proposed sensor was employed for trace-level analysis of luteolin in actual samples of herbal medicines (thyme (Thymus vulgaris L.), honeysuckle (Lonicera japonica Thunb.), and Tibetan Duyiwei (Lamiophlomis rotata (Benth.) Kudo)) with satisfactory results.

A sensitive and selective electrochemical sensor was constructed by one-step co-electropolymerization of hydroxymethylated-3,4-ethylenedioxythiophene and nitrogen-doped graphene for the trace-level analysis of luteolin in Thymus vulgaris, Lonicera japonica, and Lamiophlomis rotata.     

颈动脉与冠状动脉粥样硬化的病理对比分析

目的探讨颈动脉粥样硬化与冠状动脉粥样硬化病变之间的关系。方法应用图象分析对17例尸检患者的272段颈动脉和冠状动脉血管进行测量,比较内容包括动脉壁厚比值腔面积/截面积比值和狭窄血管支数比值。结果颈动脉和冠状动脉粥样硬化病变血管支数的比值呈正相关(r=0.79,P<0.01),其余比值无相关性。结论颈动脉粥样硬化病变的存在可以预示冠状动脉有病变,但二者病变的严重程度无明确的相关性。     

应激性血糖浓度对急性心肌梗死的影响

目的观察应激性高血糖浓度对急性心肌梗死预后的影响。方法选择符合急性心肌梗死诊断标准且有糖耐量异常患者183例,按入院后空腹血糖数值分为两组;糖耐量减低组65例,糖尿病组118例;观察两组患者血糖的变化、并发症发生的情况和死亡率。结果糖耐量减低组组患者出现并发症者18例,糖尿病组出现并发症者51例,χ2=4.30,P<0.05;糖耐量减低组30 d死亡6例,糖尿病组30 d死亡15例,χ2=0.50,P>0.05;糖耐量减低组1年内死亡12,糖尿病组1年内死亡38例,χ2=3.99,P<0.05。结论应激性高血糖浓度对缺血心肌的损害是肯定的,要及时监测和调控急性心肌梗死的血糖,阻断其对心肌细胞的进一步损害,以降低急性心肌梗死的病死率和并发症等。