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971.
972.
Bufalin,a bufanolide steroid from the parotoid glands of the Chinese toad,inhibits L‐type Ca2+ channels and contractility in rat ventricular myocytes
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Tao Song Xi Chu Xuan Zhang Qiongtao Song Ying Zhang Yuanyuan Zhang Xue Han Jianping Zhang Li Chu 《Fundamental & clinical pharmacology》2017,31(3):340-346
Bufalin is a bufanolide steroid compound in Chan Su. Chan Su is a traditional Chinese medicine prepared from the dried white secretion of the auricular and skin glands of toads and has been used as an oriental drug. However, the effect of bufalin on cardiac function and its underlying cellular mechanisms remain unclear. Here, we explore the cellular mechanisms of bufalin on myocardial protection via the whole‐cell patch‐clamp recording and video‐based edge detection system. Exposure to bufalin resulted in a concentration‐dependent blockade of ICa‐L, with the half‐maximal inhibitory concentration (IC50) of 60 μm and the maximal inhibitory effect of 71.50 ± 2.67%. Bufalin at 100 μm reduced cell shortening by 33.83 ± 4.01%. Bufalin restrained L‐type Ca2+ channels conductance, and contractility in rat ventricular myocytes. Thus, the protective effects of bufalin on the heart may be determined by the inhibitory effect on ICa‐L and the negative inotropic action caused by the decrease of intracellular Ca2+ in rat myocardial cells. 相似文献
973.
[This corrects the article on p. 1111 in vol. 26, PMID: 21860566.]. 相似文献
974.
975.
目的:通过对产生药房调剂差错原因的分析,找到减少调剂差错的方法。方法:采用美国著名的质量管理专家戴明(W.E.Deming)博士于20世纪50年代初提出的PDCA循环来总结归纳造成调剂差错的主要原因,并寻求可能减少差错的措施。对比采用措施前后一个月内的差错数,来验证措施是否行之有效。PDCA循环,是英文计划(Plan)、实施(Do)、检查(Check)和处理(Action)的缩写。PDCA循环理论最早应用于企业管理,取得了良好的效果,被管理界公认为有效的管理方法之一。结果:比较两个月的调剂差错数量,差错发生件数从290起下降到154起,下降了46.7%。结论:为减少调剂差错数量所采取的措施是行之有效、可采用的。 相似文献
976.
977.
Hye-Na Ahn Si-Yeon Jeong Gyu-Un Bae Minsun Chang Dongwei Zhang Xiyuan Liu Yihua Pei Young-Won Chin Joongku Lee Sei-Ryang Oh Yun Seon Song 《Biomolecules & therapeutics.》2014,22(4):347-354
Larrea nitida is a plant that belongs to the Zygophyllaceae family and is widely used in South America to treat inflammatory diseases, tumors and menstrual pain. However, its pharmacological activity remains unclear. In this study we evaluated the property of selective estrogen receptor modulator (SERM) of Larrea nitida extracts (LNE) as a phytoestrogen that can mimic, modulate or disrupt the actions of endogenous estrogens, depending on the tissue and relative amount of other SERMs. To investigate the property of SERM of LNE, we performed MCF-7 cell proliferation assays, estrogen response element (ERE)-luciferase reporter gene assay, human estrogen receptor (hER) binding assays and in vivo uterotrophic assay. To gain insight into the active principles, we performed a bioassay-guided analysis of LNE employing solvents of various polarities and using classical column chromatography, which yielded 16 fractions (LNs). LNE showed high binding affinities for hERα and hERβ with IC50 values of 1.20 ×10−7 g/ml and 1.00×10−7 g/ml, respectively. LNE induced 17β-estradiol (E2)-induced MCF-7 cell proliferation, however, it reduced the proliferation in the presence of E2. Furthermore, LNE had an atrophic effect in the uterus of immature rats through reducing the expression level of progesterone receptor (PR) proteins. LN08 and LN10 had more potent affinities for binding on hER α and β than other fractions. Our results indicate that LNE had higher binding affinities for hERβ than hERα, and showed SERM properties in MCF-7 breast cancer cells and the rat uterus. LNE may be useful for the treatment of estrogen-related conditions, such as female cancers and menopause. 相似文献
978.
979.
Adam W. Carrico Ean Nil Chhit Sophal Ellen Stein Muth Sokunny Neak Yuthea Jennifer L. Evans Song Ngak Lisa Maher Kimberly Page 《Journal of behavioral medicine》2016,39(3):502-510
Conditional cash transfer (CCT) and cognitive-behavioral treatments are evidence-based approaches to reduce stimulant use and sexual risk taking. We describe the adaptation and implementation of sequential behavioral interventions for Cambodian female entertainment and sex workers (FESW) who use amphetamine-type stimulants (ATS): (1) a 12-week CCT intervention; and (2) a 4-week cognitive-behavioral aftercare (AC) group. An ongoing cluster randomized stepped wedge trial in 10 Cambodian provinces is enrolling FESW with confirmed recent ATS use to examine the effectiveness of CCT + AC. In the first six provinces, 138 of the 183 eligible FESW (75 %) enrolled in CCT and completed a median of 25 (interquartile range 9–32) of the 36 urine screening visits. Of the 84 participants who were eligible for AC, 79 completed at least one session (94 %) and 57 completed three or more sessions (68 %). Culturally tailored behavioral interventions to reduce ATS use and optimize HIV prevention are feasible in resource-limited settings. 相似文献
980.