Cardamonin suppressed the migration,invasion, epithelial mesenchymal transition (EMT) and lung metastasis of colorectal cancer cells by down-regulating ADRB2 expression

ContextCardamonin (CDN) can suppress cell growth in colorectal cancer (CRC), a common digestive malignancy.ObjectiveWe explored the effect and mechanism of CDN on metastatic CRC.Materials and methodsTwo cell lines (HT29 and HCT116) were initially treated with CDN at different concentrations (5, 10 and 20 μmol/L) or 50 μmol/L propranolol (positive control) for 24 or 48 h. Then, the two cell lines were separately transfected with siADRB2 and ADRB2 overexpression plasmids, and further treated with 10 μmol/L CDN for 24 h. The cell viability, migration and invasion were determined by cell counting kit-8 (CCK-8), wound healing and transwell assays, respectively. The levels of ADRB2, matrix metalloprotease (MMP)-2, MMP-9, E-cadherin and N-cadherin were measured by Western blotting or/and RT-qPCR. A CRC metastasis model was established to evaluate the antimetastatic potential of CDN (25 mg/kg).ResultsADRB2 (3.2-fold change; p < 0.001) was highly expressed in CRC tissues. CDN at 10 μmol/L suppressed viability (69% and 70%), migration (33% and 66%), invasion (43% and 72%) and ADRB2 expression (2.2- and 2.84-fold change) in HT29 and HCT116 cells (p < 0.001). CDN at 10 μmol/L inhibited MMP-2, MMP-9 and N-cadherin expression but promoted E-cadherin expression in CRC cells (p < 0.001). Importantly, the effect of CDN on CRC cells was impaired by ADRB2 overexpression, but further enhanced by ADRB2 down-regulation (p < 0.01). Additionally, ADRB2 overexpression reversed the inhibitory effect of CDN on metastatic lung nodules (p < 0.05). Discussion and conclusions: CDN is a potential candidate for the treatment of metastatic CRC in clinical practice.     

山沉香化学成分研究

目的 研究山沉香Syringa pinnatifolia干燥茎的化学成分.方法 采用硅胶、ODS、Sephadex LH-20及RP-HPLC等色谱技术对山沉香干燥茎的化学成分进行分离纯化,根据理化性质及波谱数据鉴定化合物结构.结果 从山沉香干燥茎95％乙醇提取物的醋酸乙酯部位分离得到11个化合物,分别鉴定为开环异落叶松脂醇(1)、(8R,8'R,9R)-3,3',9-三甲氧基-4,4'-二羟基-9,9'-环氧木脂素(2)、(8R,8'R,9S)-3,3',9-三甲氧基-4,4'-二羟基-9,9'-环氧木脂素(3)、左旋松脂醇(4)、(8R,8'R,9'S)-3,3',9 '-三甲氧基-4,4 '-二羟基-9,9'-环氧木脂素(5)、(8R,8'R,9'R)-3,3',9'-三甲氧基-4,4'-二羟基-9,9'-环氧木脂素(6)、(9S)-9-O-methylcubebin (7)、邻苯二甲酸二丁酯(8)、菲律宾胡椒素Ⅵ (9)、蛇菰宁(10)、落叶松萘酮(11).结论 化合物2～11均为首次从该植物中分离得到.     

E-Cad、MMP9血清中的表达与胃癌痰湿证型关系的临床研究

目的立足于肿瘤转移的生物学特性与痰的病理特征相似基础上,探讨痰在肿瘤转移中发挥作用的可能物质基础。方法以酶联免疫吸附法检测胃癌痰湿证型患者30例治疗前后与非痰湿证型患者32例以及健康对照组10例血清中上皮钙黏附分子(E-Cad)、基质金属蛋白酶(MMP9)的表达;痰湿证组服用消痰散结方1个月,非痰湿证组不治疗。观察治疗前后血清中E-Cad、MMP9的表达变化,并与非痰湿组血清中E-Cad、MMP9的表达进行比较对照。结果两种黏附分子表达在痰湿证型与非痰湿证型中的表达均较健康组升高(P<0.05),痰湿组较非痰湿组升高(P<0.05);治疗组治疗后E-Cad的表达明显降低(P<0.05),MMP9的表达有降低趋势,但差异不显著。结论痰在肿瘤转移中发挥作用的途径可能是通过影响黏附分子的表达,两者存在相关性。     

强力霉素凝胶治疗大鼠口腔溃疡的实验研究

目的研究强力霉素对口腔溃疡的治疗作用,为临床用药提供指导。方法采用60%水醋酸酸蚀SD大鼠口腔颊黏膜建立大鼠溃疡模型。取36只造模成功大鼠随机分为3组,每组12只,分别给予高低剂量强力霉素及空白凝胶作局部治疗,分别于用药第2天、第4天、第6天每组处死4只大鼠,经过切取标本,石蜡包埋,制片,HE染色、麦氏染色和免疫组化染色后,于光镜下进行观察。结果用药后,强力霉素高低剂量组较对照组炎性渗出明显减少,充血情况明显减轻,胶原纤维降解、MMP-9的表达明显减少,溃疡愈合更快。结论强力霉素可能是通过抑制MMP-9的表达,减少胶原纤维的降解,促进口腔溃疡愈合。     

Desempenho Diagnóstico da Angiotomografia Computadorizada e da Avaliação Seriada de Troponina Cardíaca Sensível em Pacientes com Dor Torácica e Risco Intermediário para Eventos Cardiovasculares

BackgroundCoronary tomography angiography (CTA) has been mainly used for chest pain evaluation in low-risk patients, and few data exist regarding patients at intermediate risk.ObjectiveTo evaluate the performance of serial measures of sensitive troponin and CTA in intermediate-risk patients.MethodsA total of 100 patients with chest pain, TIMI risk scores of 3 or 4, and negative troponin were prospectively included. All patients underwent CTA and those with coronary stenosis ≥ 50% were referred to invasive coronary angiography. Patients with coronary lesions <50% were discharged and contacted 30 days later by a telephone call to assess clinical outcomes. Outcomes were hospitalization, death, and myocardial infarction at 30 days. The comparison between methods was performed by Kappa agreement test. The performance of troponin measures and CTA for detecting significant coronary lesions and clinical outcomes was calculated. Results were considered statistically significant when p < 0.05.ResultsCoronary stenosis ≥ 50% on CTA was found in 38% of patients and significant coronary lesions on coronary angiography were found in 31 patients. Two clinical events were observed. Kappa agreement analysis showed low agreement between troponin measures and CTA in the detection of significant coronary lesions (kappa = 0.022, p = 0.78). The performance of CTA for detecting significant coronary lesions on coronary angiography or for predicting clinical events at 30 days was better than sensitive troponin measures (accuracy of 91% versus 60%).ConclusionCTA performed better than sensitive troponin measures in the detection of significant coronary disease in patients with chest pain and intermediate risk for cardiovascular events.