RESUMEN
Acrylamide (AA) is a common endogenous contaminant in food, with a complex toxicity mechanism. The study on liver damage to experimental animals caused by AA has aroused a great attention. Rosmarinic acid (RosA) as a natural antioxidant shows excellent protective effects against AA-induced hepatotoxicity, but the potential mechanism is still unclear. In the current study, the protective effect of RosA on BRL-3A cell damage induced by AA was explored. RosA increased the activity of SOD and GSH, reduced the content of ROS and MDA, and significantly reduced the oxidative stress (OS) damage of BRL-3A cells induced by AA. RosA pretreatment inhibited the MAPK signaling pathway activated by AA, and down-regulated the phosphorylation of JNK, ERK and p38. RosA pretreatment also reduced the production of calcium ions caused by AA. In addition, the key proteins p-IRE1α, XBP-1s, TRAF2 of the IRE1 pathway, and the expression of endoplasmic reticulum stress (ERS) characteristic proteins GRP78, p-ASK1, Caspase-12 and CHOP were also down-regulated by RosA. NAC blocked the activation of the MAPK signaling pathway and inhibited the ERS pathway. RosA reduced the rate of apoptosis and down-regulated the expression of Bax/Bcl-2 and Caspase-3, thereby inhibiting AA-induced apoptosis. In conclusion, RosA reduced the OS and ERS induced by AA in BRL-3A cells, thereby inhibiting cell apoptosis, and it could be used as a potential protective agent against AA toxicity.
Asunto(s)
Acrilamida/toxicidad , Apoptosis/efectos de los fármacos , Cinamatos/farmacología , Depsidos/farmacología , Acetilcisteína/farmacología , Animales , Antioxidantes/farmacología , Línea Celular , Cinamatos/administración & dosificación , Depsidos/administración & dosificación , Relación Dosis-Respuesta a Droga , Estrés del Retículo Endoplásmico/efectos de los fármacos , Sistema de Señalización de MAP Quinasas/efectos de los fármacos , Estrés Oxidativo/efectos de los fármacos , Ratas , Estaurosporina/farmacología , Ácido RosmarínicoRESUMEN
Objective To study the repairment of pancreas mesenchymal stem cells(MSCs) on injured pancreas of rats,and find a new source of cells for treatment of diabetes. Methods ① Pancreases were taken out of three-day-old Wistar rats under bioclean condition,and cells were obtained by V-collagenase digestion. Generations were passed by conventional culture,cells were purified by adherence screening method,cell morphous was observed by Giemsa staining. The expressions of surface marker CD34 and CD44 were determined by FCM,and compared with bone marrow MSCs(BM-MSCs),the differences in character and function were observed. ②The experimental rats were divided into two groups randomly. Pancreas ischemic necrosis model was made by deligation,then the purified pancreas MSCs were marked with DAPI and then were transplantated partially. After two weeks,the survival rate was measured and histopathological detection was performed. Results ① The cells had concordant morphous gradually with vigorous generation. There was no significant difference in morphology and surface antigen compared with BM-MSCs.② The survival rate in experimental group was 75% ,the necrotic tissue had basi-rebounded. Blue fluorescent was observed in repaired pancreas tissues. The survival rate in control group was 20%. The survival rate in experimental group was higher than that in control group (P
RESUMEN
0.999 9).The minimum quantitative concentrations were 0.027 ?g?mL-1,0.033 ?g?mL-1,0.095 ?g?mL-1,respectively.The 3 kinds of organic solvents were not found in each batch except 0.10% and 0.15% ethyl acetate was found in 2 batches of samples.CONCLUSIONS:The established method is accurate,sensitive and accurate for the determination of 3 kinds of residual organic solvents in beclometasone dipropionate simultaneously.
