HPLC法同时测定扑麻滴鼻液中2成分的含量

目的:建立同时测定扑麻滴鼻液中盐酸麻黄碱和马来酸氯苯那敏含量的HPLC方法。方法:采用:PurospherSTAR RP18色谱柱(150 mm×4.6 mm,5μm),以磷酸盐缓冲液(p H 3.0±0.1)-乙腈(82∶18)为流动相,流速为1.0 ml·min-1,在210nm波长处同时检测盐酸麻黄碱和马来酸氯苯那敏,柱温35℃,进样量20μl。结果:盐酸麻黄碱和马来酸氯苯那敏分别在19.81~118.85μg·ml-1和6.21~37.25μg·ml-1浓度范围内线性关系良好,r分别为0.999 6和0.999 8。平均回收率分别为100.39%(RSD=0.69%,n=9)和100.11%(RSD=0.60%,n=9)。结论:该方法快速简便、重复性、准确性好,可用于该制剂中盐酸麻黄碱和马来酸氯苯那敏的含量测定。     

Aromatic alkyne insertion into six-membered cyclometalated pyridine complexes of iridium: different insertion modes and structurally novel products

Reactions of 2-benzoylpyridine or 2-benzylpyridine with [Cp*MCl₂]₂ (M = Ir, Rh) have been carried out in the presence of NaOAc in refluxing methanol, which form the corresponding six-membered cyclometalated products (1–3) except for the reaction of 2-benzylpyridine with [Cp*RhCl₂]₂. Insertion reactions of two six-membered cyclometalated pyridine iridium complexes (1 and 2) with terminal or internal aromatic alkynes were studied. Terminal alkynes p-XC₆H₄C CH (X = H, MeO, and F) with 1 give the corresponding five- and seven-membered doubly cycloiridated complexes 4a–c, internal alkynes p-XC₆H₄C CC₆H₄X-p (X = H, MeO, and Br) form the similar five- and seven-membered doubly cycloiridated complexes (5a,b) and/or di-insertion products (6a,c), whereas the acyl alkyne PhC CCOPh affords the novel spiro-metalated complex 7. For complex 2, internal alkynes p-XC₆H₄C CC₆H₄X-p (X = H, MeO, and Br) form similar five- and seven-membered doubly cycloiridated complexes (8a–c). However, in the case of PhC CCOPh, the reaction gives the novel four-membered cyclometalated complex 9. These results suggest that the products formed by alkyne insertion reactions of the six-membered cycloiridated pyridine complexes are very diverse. Plausible pathways for the formation of these novel insertion products were proposed. Molecular structures of seven cyclometalated complexes were determined by X-ray diffraction.

Insertion reactions of aromatic alkynes into the Ir–C bond of six-membered cycloiridated complexes formed various novel products via different insertion modes.     

慢性胰腺炎合并急性梗阻性化脓性胰管炎致假性囊肿感染1例

急性梗阻性化脓性胰管炎在临床上十分罕见,本文报道1例慢性胰腺炎合并急性梗阻性化脓性胰管炎,并在此基础上继发假性囊肿感染的病例,分析了假性囊肿感染的原因,并探讨了内镜治疗及抗感染治疗的策略与挑战。     

不同透析剂量和不同容量控制标准对佳木斯市中心医院透析患者心功能的影响

目的探讨不同透析剂量和不同容量控制标准对透析患者心功能的影响。方法抽取佳木斯市中心医院接诊的92例透析患者为研究对象,随机性分为观察组和对照组,每组46例,对照组患者接受常规容量控制和常规透析,观察组患者接受强化容量控制和强化透析,比较两组患者的心功能变化。结果观察组患者心力衰竭的发生率低于对照组,比较差异具有统计学意义(χ2=8.155,P<0.05);观察组患者左心室功能均优于对照组,组间比较差异具有统计学意义(P<0.05)。结论强化容量控制和强化透析能够有效保护心功能。     

Regenerative responses after mild heart injuries for cardiomyocyte proliferation in zebrafish

Background: The zebrafish heart regenerates after various severe injuries. Common processes of heart regeneration are cardiomyocyte proliferation, activation of epicardial tissue, and neovascularization. In order to further characterize heart regeneration processes, we introduced milder injuries and compared responses to those induced by ventricular apex resection, a widely used injury method. We used scratching of the ventricular surface and puncturing of the ventricle with a fine tungsten needle as injury‐inducing techniques. Results: Scratching the ventricular surface induced subtle cardiomyocyte proliferation and responses of the epicardium. Endothelial cell accumulation was limited to the surface of the heart. Ventricular puncture induced cardiomyocyte proliferation, endocardial and epicardial activation, and neo‐vascularization, similar to the resection method. However, the degree of the responses was milder, correlating with milder injury. Sham operation induced epicardial aldh1a2 expression but not tbx18 and WT1. Conclusions: Puncturing the ventricle induces responses equivalent to resection at milder degrees in a shorter time frame and can be used as a simple injury model. Scratching the ventricle did not induce heart regeneration and can be used for studying wound responses to epicardium. Developmental Dynamics 243:1477–1486, 2014. © 2014 Wiley Periodicals, Inc.     

71例新型冠状病毒肺炎不同病程生物学样本核酸检测分析

目的 对新型冠状病毒肺炎（coronavirus disease 2019, COVID-19）患者在不同病程阶段不同生物学样本新型冠状病毒（SARS-CoV-2）进行核酸检测,并分析其临床意义。 方法 采用横断面观察性研究设计,收集烟台市奇山医院1月24日—2月28日COVID-19确诊患者病例的相关临床资料,应用实时荧光逆转录聚合酶链反应检测技术,在疾病不同阶段采集鼻/咽拭子、痰液样本进行SARS-CoV-2核酸检测。对危（重）型及普通型患者的核酸阴转时间进行统计学分析。 结果 共纳入71例确诊患者,男性40例,女性31例。患者首发症状80.3%为发热,57.8%为咳嗽。普通型病例57例（占80.3%）,轻型病例5例（占7.0%）,重型病例8例（占11.3%）,危重型病例1例（占1.4%）。治愈出院40例,平均住院（22.78±6.19）d;鼻咽拭子和痰液样本在发病的1、2、3、4和5周的核酸检出率分别为100.0%和87.5%、48.6%和88.2%、44.7%和86.1%、19.1%和58.7%、11.5%和33.3%。鼻咽拭子的假阴性率在发病的1、2、3、4和5周分别为12.5%、52.9%、、44.1%、42.9%、20.0%。同期两种样本送检结果一致率在发病第1周及第5周较高;发病1周无病毒学核酸检测阴转的病例,发病2周有2例（占3.9%）,3周有12例（占23.5%）,4周有20例（占39.2%）,5周有16例（占31.4%）,5周后有1例（占2.0%）。第4~5周病毒核酸转阴率最高（占70.6%）;危（重）型和普通型病人的核酸阴转时间分别为（30.00±3.54）d和（24.00±5.84）d ,差异有统计学意义（P<0.05）。 结论 COVID-19的主要症状为发热,干咳。普通型病例为主。痰液样本核酸检测的阳性率高于鼻咽拭子样本,鼻咽拭子检测结果存在假阴性,两种样本联合送检可减少假阴性的发生。在发病的第4周及第5周病毒核酸转阴率最高。重症患者病毒的持续存在,可能是病情加重的主要因素之一。     

王自平应用补肾化瘀法治疗子宫内膜异位症

子宫内膜异位症发生的基础是肾气亏虚,发病的关键因素是胞宫瘀血内阻。瘀血既是发病之因,又是病理产物,肾虚和血瘀互为因果,致使本病迁延难愈。王自平教授认为,补肾化瘀法是治疗本病的常用方法。临证时,将补肾类与活血类中药联合应用,活血化瘀以治标,补益肾气以治本;结合中药灌肠、中药热敷、针灸以补益肾气、活血化瘀;同时顾护脾胃,常用健运脾胃类中药培补后天脾胃以生血,佐以活血调经补冲任。如此可有效地改善患者激素水平,增加子宫内膜的局部血液循环,提高子宫内膜异位症患者的临床妊娠率。     

他莫昔芬对ER- GPER+乳腺癌细胞上皮间质转化的影响及机制

目的：探讨他莫昔芬（TAM）对雌激素受体（ER）阴性、G蛋白偶联雌激素受体（GPER）阳性乳腺癌细胞上皮间质转化（EMT）的影响。方法：以ER阴性（ER-）、GPER阳性（GPER+）乳腺癌MDA-MB-468细胞为研究对象,用TAM处理细胞,GPER特异性抑制剂G15抑制胞内GPER活性,siRNA干扰GPER蛋白表达,侵袭小室实验检测细胞侵袭能力,Western blot检测ERα、GPER、Vimentin、E-cadherin及N-cadherin蛋白表达变化。结果：TAM（5 μmol/L）可明显增强MDA-MB-468细胞的侵袭能力（P＜0.01）;G15（10 μmol/L）预处理能显著抑制TAM诱导的细胞侵袭活动（P＜0.01）;GPER-siRNA可明显干扰MDA-MB-468细胞GPER蛋白表达（P＜0.01）;干扰GPER蛋白表达能有效抑制TAM诱导的细胞侵袭活动（P＜0.01）。TAM处理明显诱导Vimentin和N-cadherin蛋白表达上调（P＜0.01）,E-cadherin蛋白表达下调（P＜0.01）;G15预处理或干扰GPER蛋白表达均能抑制TAM的上述诱导作用（均P＜0.05）。结论：TAM能诱导ER- GPER+乳腺癌MDA-MB-468细胞EMT,其作用与其激活GPER有关。