Effect of ergosterol peroxide derivatives on the proliferation ，migration and invasion of human triple negative breast cancer cell / 中国药房

OBJECT IVE To study the effects of ergosterol peroxide derivatives EP-3P on the proliferation ，migration and invasion of human tripe negative breast cancer cell MDA-MB- 231，and to provide reference for the development of breast cancer related drugs. METHODS MTT assay was adopted to detect the proliferation of MDA-MB- 231 cells after treated with 0（blank control），1.25，2.5，5，10，20，40 μmol/L EP-3P for 24，48 and 72 h. Wound healing assay and Transwell chamber method were adopted to detect the migration and invasion ability of MDA-MB- 231 cells after treated with 0（blank control ），5，10，20 EP-3P for 24 h. The apoptosis and cell cycle distribution were detected by flow cytometry. Western blot assay was used to detect the expressions of B-cell lympho ma-2（Bcl-2），Bcl-2 associated X protein （Bax），caspase-3，cleaved-caspase-3，cytochrome C （Cyt-C），matrix metalloproteinase- 2（MMP-2）and MMP- 9. RESULTS Compared with blank control group ，2.5，5，10，20，40 μmol/L EP-3P could significantly increase the inhibitory rate of cell proliferation （P＜0.05 or P＜0.01）in a dose and time- dependent manner. After 24 h treatment of EP- 3P（10，20 μmol/L），the rate of cell migration and the number of invasive cells were decreased significantly （P＜0.01），and cell was arrested at G 2/M stage （P＜0.05 or P＜0.01）；the apoptotic rate was increased significantly （P＜0.05）；the protein expressions of Bax ，Cyt-C and cleaved-caspase- 3 were upregulated significantly ， while those of Bcl- 2，caspase-3，MMP-2 and MMP- 9 were downregulated significantly （P＜0.01）. CONCLUSIONS EP-3P can inhibit the proliferation ，migration and invasion of human tripe negative breast cancer cells MDA-MB- 231 through mitochondrial mediated endogenous caspase pathway ，and induce the apoptosis of cells .

A fraction from Petiveria alliacea induces apoptosis via a mitochondria-dependent pathway and regulates HSP70 expression / Una fracción de Petiveria alliacea induce apoptosis dependiente de la mitocondria y regula la expresión de la proteína HSP70 / Uma fração de Petiveria alliacea induz apoptose dependente da mitocôndria e regula a expressão da proteína HSP70

Objective. To evaluate the biological activity of Petiveria alliacea extracts on tumoral cells in vitro. Materials and methods. P.alliacea fractions prepared by a bioguided purification protocol were characterized by their biological activities on two human tumoral cell lines. Morphological changes, cell viability, mitochondrial membrane depolarization, nuclear staining and activity on HSP70 were analyzed. Results. The present study demonstrates that P.alliacea fractions can induce apoptosis in a mitochondria-dependent pathway and down regulate HSP70 expression in vitro. The possible compounds present in P.alliacea responsible for the described biological activities were identified by dereplication methods. Conclusion. The present study provides new knowledge on the antitumoral properties of the plant species P. alliacea described in several ethnobotanical studies.

Objetivo. Evaluar la actividad biológica in vitro de extractos de Petiveria alliacea utilizando líneas celulares tumorales. Materiales y métodos. Las fracciones de P.alliacea fueron preparadas mediante un protocolo de purificación biodirigido. La actividad biológica fue caracterizada utilizando dos líneas celulares tumorales de origen humano, donde se analizaron los cambios morfológicos, la viabilidad celular, la actividad sobre la membrana mitocondrial y la fragmentación nuclear. Asimismo se evaluó la actividad de las fracciones sobre la expresión de la proteína HSP70. Resultados. El presente estudio muestra que las fracciones de P.alliacea inducen muerte celular por apoptosis dependiente de la mitocondria y además regulan negativamente la expresión de la proteína HSP70. Los compuestos que posiblemente son responsables de la actividad biológica presente en las fracciones de P.alliacea fueron identificados por dereplicación. Conclusión. El presente estudio contribuye a explicar en parte las propiedades antitumorales de la planta P.alliacea descritas en diversos escritos etnobotánicos.

Objetivo. Avaliar a atividade biológica in vitro de extratos de Petiveria alliacea utilizando linhagens de células tumorais. Materiais e métodos. Frações de P.alliacea foram preparadas utilizando um protocolo de purificação bio-dirigido. A atividade biológica foi caracterizada utilizando duas linhagens de células tumorais de origem humana, onde se analisaram as alterações morfológicas, a viabilidade celular, a atividade na membrana mitocondrial e a fragmentação nuclear. Também se avaliaram a atividade das frações sobre a expressão da proteína HSP70. Resultados. Este estudo mostra que as frações de P.alliacea induzem a morte celular por apoptose dependente da mitocôndria e também regulam negativamente a expressão da proteína HSP70. Os compostos que provavelmente são responsáveis pela atividade biológica presente nas frações de P.alliacea foram identificados por dereplicação. Conclusão. Este estudo ajuda a explicar, em parte, as propriedades antitumorais da planta P.alliacea descrita em vários escritos etnobotônicos.

DIET AND NUTRIENTS AS RISK FACTORS OF COLON CANCER-A POPULATION-BASED CASE-CONTROL STUDY IN SHANGHAI / 营养学报

In order to describe the epidemiological features and explore the risk factors of colon cancer, a population-based case-control study involving 476 cases of colon cancer and 857 controls matched by age and sex was carried out from Sep. 1988 to Aug. 1989. In this paper the risk factors related to colon cancer are reported as follows; The major risk factors of colon cancer in the area were generally in accordance with the prevalent hypothesis, colon cancer in Shanghai urban area may present the characteristics of low risk areas. Analysis of single and multiple factors of food intake frequency and quantity indicated that most vegetables usually cast a protective effect. Males in the highest quartile of intake of vegetables had a OR of 0.4 (P trend