Mechanisms of the dilator action of the Erigerontis Herba on rat aorta

Ethnopharmacological relevance

Erigerontis Herba is widely used as a traditional Chinese medicine and is commonly used for neuroprotection and vascular protection.

Aim of study

In this study, the vasodilator effects of Erigerontis Herba (DZXX) were investigated using rat isolated aorta rings.

Material and method

The involvement of endothelium in the vasorelaxation was studied by comparing response of endothelium-intact and endothelium-denuded aorta rings which precontracted with U46619. The involvement of K⁺ channels was studied by pretreatment of the aorta rings with various K⁺ channel inhibitors. The involvement of Ca²⁺ channel was studied by incubating aorta rings with Ca²⁺-free solution, primed with U46619 prior to elicit contraction by addition of Ca²⁺ solution.

Results

DZXX (0.2–2 mg/ml) induced a concentration-dependent relaxation on U44619-precontracted aorta rings with EC₅₀ of 0.354±0.036 mg/ml. Removal of endothelium or pretreatment with a BK_Ca inhibitor iberiotoxin, K_IR inhibitor barium chloride or K_v inhibitor 4-aminopyridine produced no effect on the DZXX-induced vasorelaxation. However, pretreatment with a K_ATP inhibitor glibenclamide or a non-selective K⁺ channel inhibitor tetraethylammonium produced significant inhibition on the DZXX-induced vasorelaxation by 29.9% and 21.3%, respectively. Pretreatment with DZXX (0.4, 1.2 and 2 mg/ml) produced a concentration-dependent inhibition on Ca²⁺-induced vasoconstriction.

Conclusions

These results suggest that the vasodilator effect of DZXX was endothelium-independent, mediated by decreasing the influx of Ca²⁺ by calcium channel inhibition and increasing the influx of K⁺ by opening of a K_ATP channel.     

灸法研究的战略思考

在中医针灸学现代化和国际化进程中,灸法的应用日益受到关注。灸法作用机理研究已成为针灸医学研究领域亟待解决的关键科学问题。该文在总结前期灸法研究成果的基础上,对灸法下一步深入研究进行了思考和展望,认为亟需开展多学科交叉研究,阐明灸法的内源性调节机制,揭示艾灸得气、灸温、灸材等因素的作用特点、规律和机制,明确艾灸热、光、烟与灸效的关系,并确证艾灸与针刺作用的异同,以推动灸法研究新一轮的发展和创新;并展望灸法在“治未病”及防治疾病中的作用与贡献。     

针刺与硬膜外腔复合麻醉用于胆囊切除术的临床研究

81例胆囊切除术分为 3组 : 组针刺与单纯硬膜外低浓度局麻药复合麻醉 ; 组单纯硬膜外低浓度局麻药麻醉 ; 组硬膜外常规浓度局麻药麻醉。临床观察麻醉效果 , 、 组进行同位素放射免疫测定进行比较研究 ,其结果显示针刺与硬膜外复合麻醉既减少麻醉药用量又对机体有调整作用 ,对手术刺激反应具有保护性抑制作用 ,使循环系统更稳定。     

基于磁共振技术的功能性胃肠病中枢病理变化研究现状＊

目的 通过对基于磁共振技术的功能性胃肠病（Functional Gastrointestinal Disorders，FGIDs）中枢病理变化相关文献进行回顾，分析该领域研究现状，以期为今后研究提供参考与借鉴。方法 以Web of Science收录1993年-2019年相关文献为对象，应用CiteSpace软件对文献的基本情况、研究的病种及重点脑区等进行共现分析，并绘制相关可视化图谱。结果 ①共获得文献151篇，发文量总体呈上升趋势，2017年文献发表数达到最高；②发表论文数量排名前3的国家分别是美国、中国、德国；③发文频次位于前3位的作者分别是Emeran A Mayer、K Tillisch、Fang Zeng；④主要是胃肠疾病类与影像学类相关杂志发文，核心期刊为Gastroenterology，Gut，Neurogastroenty and Molity；⑤对关键词进行聚类分析后，形成10个聚类群，分别为functional dyspepsia、brain response、endoanal ultrasound、prefrontal cortex、image cytometry、colonic function、functional constipation、acupuncture、resting-state、diffusion tensor imaging、default mode network。结论 ①基于神经影像技术，对FGIDs相关中枢机制的研究日益受到关注；②研究的主要病种是肠易激综合征、功能性消化不良和功能性便秘；③大脑前额叶皮质，前扣带回皮质，默认网络是FGIDs神经影像领域中备受关注的区域；④针灸是基于磁共振技术的FGIDs中枢机制研究中最常见的干预治疗方式。     

脂肪酸代谢异常是二甲基亚硝胺诱导的大鼠肝纤维化发病机制之一

目的：二甲基亚硝胺（DMN）诱导的大鼠肝纤维化模型是经典的动物模型,其病理变化与人类肝纤维化发生相类似。普遍观点认为,DMN化学刺激导致肝细胞的损伤,是诱导肝纤维化发生的直接原因,然而其具体的发病机制并不清楚。糖脂代谢异常是脂肪性肝病发生的主要原因之一。糖脂代谢紊乱是否也在DMN诱导肝纤维化模型中占有重要地位,至今尚不清楚。本研究采用全基因芯片技术与生物信息技术相结合方式,研究糖脂代谢异常与DMN诱导肝纤维化之间关系。方法：雄性Wistar大鼠每周前3天连续腹腔注射10mg?kg^-1DMN,持续4周,正常组大鼠给予等量生理盐水。造模2周末,正常组和模型组各5只大鼠做动态观察;造模4周末,剩余大鼠被全部处死,收集肝脏标本。进行肝组织全基因芯片分析,将结果导入生物信息分析软件IPA进行分析。结果：2周模型组与正常组之间、4周模型组与正常组之间共有55个共同差异基因（logRatio>2）。共同差异基因构成的分子网络,主要参与了9条信号通路,它们与炎症、免疫、肝纤维化、脂代谢和血管新生有密切关系。在造模2周（肝纤维化形成期）时,以脂肪酸代谢异常为主要表现;在造模4周（肝硬化形成期）时,以细胞增殖为主要表现。结论：脂肪酸代谢紊乱可能是DMN诱导肝纤维大鼠发病机制之一。     

Combined Effect of Metastasis-Related MicroRNA,miR-34 and miR-124 Family,Methylation on Prognosis of Non–Small-Cell Lung Cancer

Background

Many patients with non–small-cell lung cancer (NSCLC) still develop tumor metastasis and recurrence after pulmonary resection and are the primary causes of lung cancer treatment failure and death. MicroRNAs (miRs) have central roles during tumor metastasis and many miR genes are potentially subjected to control by DNA methylation in multiple tumor types. Recently, miR-34 and miR-124 have been demonstrated as potential regulators of the metastasis process in several cancer types.

自体造血干细胞移植治疗恶性淋巴瘤疗效分析

目的:观察自体外周血造血干细胞移植（autologous hematopoietic stem cell transplantation,Auto-HSCT）治疗恶性淋巴瘤的疗效。方法:选择2007年8月-2013年12月恶性淋巴瘤病例28例,均采用Auto-HSCT,移植前采用化疗联合G-CSF动员外周血造血干细胞,并积极预防感染及并发症。结果:本组1例回输后因脑出血死亡,其余均成功植入并快速重建造血,随访至2014年3月1日,共3例死亡,其中1例为回输后因脑出血死亡,其余2例均为复发。共6例复发,中位复发时间为3.5（1-15）个月,2例患者行双次自体移植,均无复发,28例移植患者预期中位无进展生存时间21个月。结论:自体造血干细胞移植能很快重建造血,病死率较低,安全可行,是治疗恶性淋巴瘤有效的手段之一。     

Serum haptoglobin as a novel molecular biomarker predicting colorectal cancer hepatic metastasis

Early detection of liver metastasis is important for improving colorectal cancer (CRC) patient survival. Our previous studies showed haptoglobin was highly expressed in primary CRC tissues, especially in heterochronous metastatic cases. Here, we assessed the potential of serum haptoglobin (sHP) as a biomarker for early detection of CRC liver metastasis by evaluating the sHP in 475 CRC patients and 152 healthy volunteers. In the training set (250 cases), sHP level in CRC‐M1 (1773.18 ± 690.25 ng/mL) were significantly increased as compared to in CRC‐M0 (1544.37 ± 1497.65 ng/mL) or healthy (917.76 ± 571.59 ng/mL). And the high sHP level was correlated with poor survival. Logistic regression analysis revealed that sHP, serum carcinoembryonic antigen (sCEA) and serum carbohydrate antigen 19.9 (sCA19.9) level were the significant parameters for detecting liver metastasis. In leave‐one‐out‐cross‐validation, these three markers resulted in 89.1% sensitivity and 85.8% specificity for hepatic metastasis detection. In an independent test set (225 cases), receiver operating characteristic curve analysis of sHP in CRC liver metastasis showed an area under the curve of 0.735, with a sensitivity of 87.2% and a specificity of 59.9%. Combination of sHP, sCEA and sCA19.9 improved diagnostic accuracy to 0.880, with a sensitivity of 88.5% and a specificity of 87.8%. Silencing of HP by specific shRNA significantly inhibited the LOVO and SW620 cell invasion, and suppressed xenograft tumor invasive growth. In summary, these results demonstrate that sHP is associated with poor prognosis of CRC patients and that HP promotes colorectal cancer cell invasion. sHP combining with sCA19.9 and sCEA may be used as accurate predictors of CRC liver metastasis.     

子宫颈鳞癌ⅠA_1期30例临床分析

背景与目的:宫颈鳞癌ⅠA1期术前诊断和处理仍有争议,本研究旨在探讨ⅠA1期宫颈鳞癌诊断和处理的恰当方式。方法:回顾分析我院1992～2001年收治的30例宫颈鳞癌ⅠA1期患者的临床和病理资料。结果:30例患者中7例既无症状又无明显体征(23.3%)。23例行细胞学检查,阳性率为86.9%(20/23);23例行阴道镜检查,准确率为78.2%(18/23);10例行宫颈管刮取术,4例阳性。30例患者中22例行广泛或次广泛全子宫切除术(73.3%),6例行全子宫切除术,2例行宫颈冷刀锥切术;28例子宫切除标本宫旁组织均未受侵,阴道残端均无癌残留,其中8例行盆腔淋巴结清扫术,平均切除淋巴结22枚,均为阴性,两例锥切标本切缘干净;术前诊断与最后诊断符合率为56.7%(17/30)。术后中位随访时间34个月(17～111个月),均无复发。结论:ⅠA1期宫颈鳞癌术前阴道镜检查及宫颈多点活检诊断准确率低;冷刀锥切可提高诊断准确率,同时又可作为要求保留生育功能的ⅠA1期宫颈鳞癌患者的治疗方式。     

3.0TMR多期动态增强扫描在鉴别乳腺导管原位癌与乳腺腺病中的价值

目的:探讨3.0T MR动态增强扫描在鉴别乳腺导管原位癌和乳腺腺病中的价值。方法:研究纳入了经手术或穿刺活检证实的38例导管原位癌和40例乳腺腺病患者,对两组病变的MR多期动态增强表现进行回顾性对照分析,评价指标包括:强化形态、内部强化特点及时间-信号强度曲线,并对有统计学显著性差异的影像学征象的鉴别诊断价值进行分析。结果:导管样强化、节段样强化和肿块样强化多见于导管原位癌(P=0.04,0.04,0.02)。区域性强化和弥漫性强化多见于乳腺腺病(P=0.03,0.02)。点簇样强化及边缘强化多见于导管原位癌(P=0.02,0.03)。不均匀性强化多见于乳腺腺病(P=0.04)。速升缓降型曲线和速升平台型曲线多见于导管原位癌(P=0.03,0.02),持续缓升型和缓升平台型多见于腺病(P=0.03,0.04)。病变强化形态的鉴别诊断价值要高于内部强化特点和时间-信号强度曲线,其敏感度、特异度及准确度分别为69.2%、71.2%和70.4%。结论:3.0T MR动态增强扫描有助于鉴别导管原位癌和乳腺腺病,病变强化形态的鉴别诊断价值要高于内部强化特点和时间-信号强度曲线。