丰城鸡血藤与香花崖豆藤的鉴定区别

目的探讨丰城鸡血藤与香花崖豆藤的鉴定区别。方法比较两者的性状,显微、成份及功能、主治并进行分析。结果可以区分丰城鸡血藤和香花崖豆藤。结论经过鉴定区别,丰城鸡血藤与香花崖豆藤在植物形态、组织结构上有区别,不能混淆使用。     

比较研究不同处方痰热清口服液抗流感病毒和抗菌的作用

目的 研究3种不同处方的痰热清口服液抗流感病毒鼠肺适应株及抗菌作用,并比较三者作用的强弱.方法 以病毒滴鼻感染小鼠、采用体内、外抗菌试验观察痰热清口服液的作用.结果 三者均可使病毒感染小鼠死亡率明显降低,存活时间明显延长,含熊去氧胆酸或熊胆粉提取物的痰热清口服液能明显降低肺指数,不含熊去氧胆酸和熊胆粉提取物的口服液此作...     

刺五加叶皂甙单体Sb对培养大鼠心肌细胞动作电位的影响

本研究中所用的刺五加叶皂甙单体Ｓｂ（５０、２００μｇ／ｍＬ），使培养的ｗｉｓｔａｒ大鼠心肌细胞动作电位的波幅、波宽、阈电位、最大舒张电位、超射、最大除极速度及复极（１０％、５０％、９０％）水平的动作电位波宽一致减小。Ｃａ２＋８０μｇ／ｍＬ能使之反转，Ｓｂ作用与尼莫地平作用相似。上述结果表明Ｓｂ具有钙通道阻滞作用。     

自然界中华按蚊种群研究工具及其在生命表制作中的应用

目的：为了能在自然界大型水体和旷野中对中华按蚊种群进行研究。方法：研制出适合于稻田浅水定量研究的实验简,适合于深水的实验网和接近自然状态的大实验笼。应用这些工具进行了自然界中华按蚊种群生命表的研究。结果：利用系列研究工具定量研究出1988年第8代中华按蚊自然种群生命表。求出各发育历期的死亡数和死亡因素,死亡率,存活率和死亡因素k值,分析出各发育阶段的关键死亡因素,计算下代预计产卵量为8288粒,种群趋势指数I为6．3027。结论：系列研究工具使中华按蚊自然种群的定量研究成为可能。郑州中华按蚊第9代种群数量还趋于增加之中。     

护理本科藏族学生中医护理课程学习特点的质性研究

目的探讨跨文化背景下,内地护理本科藏族学生中医护理课程学习特点。方法2019年3月,目的抽样法选取浙江省已学习中医护理课程的18名本科藏族护生为研究对象,采用质性研究法,对其进行半结构式访谈;并采用传统内容分析法进行资料分析。结果共提炼归纳出3个主题:学习动机的发生发展;缺乏学习迁移策略;存在文化适应性问题。结论本科藏族护生学习中医护理动机逐步明确,但缺乏有效的学习方法和学习计划,对中医护理文化内涵缺乏了解。考虑到藏族护生的自身特点,中医护理教育者应针对具体原因,制定相应的教学改革模式,融合民族特色,减少文化差异对课程学习带来的冲击。     

一氧化碳中毒SPECT脑血流灌注显像研究

一氧化碳(CO)中毒可引起多种脑部病变，全面了解这些病变对诊断和治疗有很大的帮助。SPECT脑血流灌注显像已常规用于脑血管病、痴呆、癫痫、精神疾病的诊断中，并被证实具有不可替代的作用，但它应用于CO中毒诊断的报道尚少。我们对45例CO中毒患者不同时期的SPECT脑血流灌注显像结果进行总结，以期了解CO中毒者SPECT脑血流灌注显像特点及其临床应用价值。     

Real-World Palbociclib Use in HR+/HER2− Advanced Breast Cancer in Canada: The IRIS Study

Background: Palbociclib is a selective cyclin-dependent kinase (CDK) 4/6 inhibitor used in combination with aromatase inhibitors or fulvestrant for patients with hormone receptor-positive (HR+) human epidermal growth factor receptor 2 (HER2)-negative advanced/metastatic breast cancer (ABC/MBC). Palbociclib was the first CDK 4/6 inhibitor approved for HR+/HER2− ABC/MBC treatment in Canada in combination with letrozole (P+L) as an initial endocrine-based therapy (approved March 2016), or with fulvestrant (P+F) following disease progression after prior endocrine therapy (approved May 2017). The Ibrance Real World Insights (IRIS) study ({"type":"clinical-trial","attrs":{"text":"NCT03159195","term_id":"NCT03159195"}}NCT03159195) collected real-world outcomes data for palbociclib-treated patients in several countries, including Canada. Methods: This retrospective chart review included women with HR+/HER2− ABC/MBC receiving P+L or P+F in Canada. Physicians reviewed medical records for up to 14 patients, abstracting demographic and clinical characteristics, treatment patterns, and clinical outcomes. Progression-free rates (PFRs) and survival rates (SRs) at 6, 12, 18, and 24 months were estimated via Kaplan–Meier analysis. Results: Thirty-three physicians examined medical records for 247 patients (P+L, n = 214; P+F, n = 33). Median follow-up was 8.8 months for P+L and 7.0 months for P+F. Most patients were initiated on palbociclib 125 mg/d (P+L, 90.2%; P+F, 84.8%). Doses were reduced in 16.6% of P+L and 14.3% of P+F patients initiating palbociclib at 125 mg/d. The PFR for P+L was 90.3% at 12 months and 78.2% at 18 months; corresponding SRs were 95.6% and 93.0%. For P+F, 6-month PFR was 91.0%; 12-month SR was 100.0%. Conclusions: Dose reduction rates were low and PFR and SR were high in this Canadian real-world assessment of P+L and P+F treatments, suggesting that palbociclib combinations are well tolerated and effective.     

静磁场作用下金属离子对成骨细胞的毒性

背景:体内体外实验研究证明,静磁场具有促进成骨细胞分化及骨形成的作用。目的:观察静磁场作用下金属离子对成骨细胞毒性的影响。方法:将CoCl2粉末与CrCl3粉末溶于无菌注射用水配制成CoCl2溶液和CrCl3溶液,将金属离子Co2+、Cr3+分别与小鼠颅骨成骨细胞(MC3T3-E1)在不同的磁场强度(1,10,100mT)下共培养。实验分4组:设Co2++Cr3+组(对照组)和Co2++Cr3+分别+1,10,100mT组。结果与结论:恒磁场作用下的成骨细胞呈现更加成熟的形态学特征,Co2+、Cr3+金属离子对成骨细胞MC3T3的毒性明显降低;同时G2M(分裂期)分布比例明显增加,细胞停滞在G0G1(休眠期)的比率明显减少;与对照组相比,不同场强磁场加载后,成骨细胞碱性磷酸酶活性明显增强(P<0.05)。提示一定强度的静磁场可拮抗Co2+、Cr3+金属离子对成骨细胞的毒性作用。     

STK15 F31I polymorphism is associated with breast cancer risk: a meta-analysis involving 25,014 subjects

Published data on the association between STK15 F31I polymorphism and breast cancer risk are inconclusive. In order to derive a more precise estimation of the relationship, a meta-analysis was performed. Medline, PubMed, Embase, Web of Science, and Chinese Biomedicine Database were searched. Crude ORs with 95% CIs were used to assess the strength of association between the STK15 F31I polymorphism and breast cancer risk. The pooled ORs were performed for codominant model (FI vs. FF; II vs. FF), dominant model (FI + II vs. FF), and recessive model (II vs. FI + FF), respectively. A total of 10 studies including 10,537 cases and 14,477 controls were involved in this meta-analysis. Overall, significantly elevated breast cancer risk was associated with II variant genotype in homozygote comparison and recessive genetic model when all studies were pooled into the meta-analysis (for II vs. FF: OR = 1.23, 95% CI = 1.10–1.37; for recessive model: OR = 1.21, 95% CI = 1.05–1.40). In the subgroup analysis by ethnicity, significantly increased risks were found for II allele carriers among Caucasians (for II vs. FF: OR = 1.24, 95% CI = 1.08–1.43; for recessive model: OR = 1.21, 95% CI = 1.00–1.45); significantly increased risks were also found among Asians for II versus FF (OR = 1.21; 95% CI = 1.01–1.45). In conclusion, this meta-analysis suggests that the STK15 31II allele is a low-penetrant risk factor for developing breast cancer.     

Altered white matter microstructure identified with tract-based spatial statistics in irritable bowel syndrome: a diffusion tensor imaging study

The neural mechanisms underlying the pathophysiology of irritable bowel syndrome(IBS) are far from being completely understood. The purpose of the present study was to investigate potential white matter (WM) microstructural changes and underlying causes for WM impairment in IBS using diffusion tensor imaging. The present prospective study involved 19 patients with IBS and 20 healthy controls. Whole-brain voxel-wise analyses of fractional anisotropy (FA), mean diffusivity (MD), axial diffusivity (AD), and radial diffusivity (RD) were performed by tract-based spatial statistics (TBSS) to localize abnormal WM regions between the 2 groups. We found that IBS patients had significantly reduced FA (P < 0.05) in the splenium of the corpus callosum, the right retrolenticular area of the internal capsule and the right superior corona radiata. We also found increased MD (P < 0.05) in the splenium and body of the corpus callosum, the right retrolenticular area of the internal capsule, the right superior corona radiata and the right posterior limb of the internal capsule. In addition, IBS patients had significantly increased AD (P < 0.05) in the splenium of the corpus callosum, the bilateral retrolenticular area of the internal capsule and the left posterior limb of the internal capsule. We conclude that the WM microstructure is changed in IBS and the underlying pathological basis may be attributed to the axonal injury and loss. These results may lead to a better understanding of the pathophysiology of IBS.