(±)-Talapyrones A-F (1-6), six pairs of dimeric polyketide enantiomers featuring unusual 6/6/6 and 6/6/6/5 ring systems, were isolated from the fungus Talaromyces adpressus. Their structures were determined by spectroscopic analysis and HR-ESI-MS data, and their absolute configurations were elucidated using a modified Mosher's method and electronic circular dichroism (ECD) calculations. (±)-Talapyrones A-F (1-6) possess a 6/6/6 tricyclic skeleton, presumably formed through a Michael addition reaction between one molecule of α-pyrone derivative and one molecule of C₈ poly-β-keto chain. In addition, compounds 2/3 and 4/5 are two pairs of C-18 epimers, respectively. Putative biosynthetic pathways of 1-6 were discussed.
Polyketides/isolation & purification* ; Talaromyces/chemistry* ; Stereoisomerism ; Molecular Structure ; Circular Dichroism ; Pyrones/chemistry*

Objective : To explore the role of Argonaute ( Ago) gene and RNA⁃Dependent RNA Polymerase (RDRP) gene of Aspergillus flavus in the growth and development about the RNAi mechanism . Methods : A. flavus Ago1 , Ago2 , RDRP1 , RDRP3 gene mutant strains were constructed by homologous recombination . The growth and development of the mutant strains were observed on potato dextrose agar(PDA) + uracil uridine (UU) medium inoculated with 3 μl 106 CFU/mL spores . 200 , 400 μg cell wall pressure agent conidored ( CR) , 0. 8 mol/L , 1 . 6 mol/L osmotic pressure agent NaCl , 2 mmol/L , 4 mmol/L oxidative pressure agent hydrogen peroxide (H2 O2 ) and 0. 01% , 0. 02% genomic damage agent methyl mesylate (MMS) were added to the Yeast extract Glucose Minimum (YGM) + UU medium to analyze the stress response of the mutant strains . Results : A. flavus mutant strains about ΔAgo1 , ΔAgo2 , ΔRDRP1 , ΔRDRP3 were successfully constructed and its growth and development were normal . The ΔAgo1 and ΔAgo2 strains reduced the stress effects on cell wall and osmotic pressure compared to the control . Ago1 gene deletion reduced the effect of H2 O2 , and conversely RDRP3 gene deletion increased the inhibition of H2 O2 . The Ago2 and RDRP1 strains reduced the effect on genetic damage agent . In addition , ΔRDRP1 increased the effect of osmotic stress . Conclusion The Ago1 , Ago2 , RDRP1 and RDRP3 genes of A. flavus are not in⁃ volved in the regulation of growth rate and asexual reproduction and can participate in the regulating of the host stress response to the environment .

Objective To investigate the application effect of selective cyclooxygenase-2 (COX-2) inhibitor in perioperative preemptive on-demand analgesia of the patients with laparoscopic cholecystectomy under enhanced recovery after surgery(ERAS).Methods The clinical data in 206 cases of gallstones undergoing selective COX-2 inhibitor for preemptive analgesia (new type analgesic group) from June to December 2015 and 198 cases of gallstones undergoing tramadol postoperative analgesia (traditional analgesia group) in the biliary surgery department of West China Hospital of Sichuan University were retrospectively analyzed.The intraoperative anesthesia schemes in the two groups were consistent.The same pain resolution scheme was adopted after operation.Then the VAS pain score,pain relief drug use rate,adverse reactions,analgesic satisfaction and hospitalization time were compared between the two groups.Results The VAS scores at postoperative 2,6,12,24 h in the new type analgesia group were lower than those in the traditional analgesia group,the difference was statistically significant (P＜0.05);the analgesic drug use rate in the new type analgesia group was lower than that in the traditional analgesia group (14.56％ vs.44.95％,P＜0.05),and the use rate of tramadol hydrochloride and pethidine hydrochloride was lower than that in the traditional analgesia group (P＜0.05).The incidence rate of adverse reactions in the new type analgesia group was lower (2.43％ vs.36.36％,P＜0.05).The incidence rate of nausea and vomiting in the new type analgesia group was lower than that in the traditional analgesia group (P＜0.05),and the incidence rate of other complications had no statistically signifiwas higher than that in the traditional analgesia group (P＜0.05);the average hospital stay and postoperative hospital stay had no statistical difference between the two groups (P＞0.05).Conclusion COX-2 inhibitors can effectively reduce perioperative pain degree in the patients with laparoscopic cholecystectomy,reduces the use frequency of analgesic drugs,shortens the hospital stay time and increases the patient satisfaction.cant difference (P＞0.05).The perioperative patient analgesia satisfaction the in the new type analgesia group

Objective To initially investigate the time - dependent relation between breviscapine with peroxisome proliferator‐ac‐tivated receptor‐alpha(PPAR‐α) ,apolipoprotein A5 (apoA5) and triglyceride(TG) in HepG2 cells in different time points by ob‐serving the effect of breviscapine on the expression and contents of PPAR‐α ,apoA5 and TG in order to lay a certain foundation for further exploring the concrete mechanism for its regulating TG metabolism .Methods On the basis of earlier stage experiment ,100 mmol/L breviscapine was selected to treat the HepG2 cells at different time points (0 ,6 ,12 ,24 ,36 ,48 h) .The levels of PPAR‐αand apoA5 gene and protein ,and the TG content in HepG2 cells were detected .Results Breviscapine could increase the levels of PPAR‐α and apoA5 gene and protein and decrease the TG content in HepG2 cells (P< 0 .05) ,moreover which showed the time -dependence .Conclusion Breviscapine may decrease the TG level in HepG2 cells ,its mechanism may be realized by increasing the expression of PPAR‐α ,thus increacing the expression of apoA5 in HepG2 cell .

The present study examined the protective effect of the ethanol extract of Sarcopyramis nepalensis (EESN) on agents-induced hepatotoxicity in mice and the possible mechanism. Acute liver injury was induced by administration of either CCl(4) or D-GalN. The animals were divided into 5 groups in terms of different treatment: normal group, CCl(4) or D-GalN group, silymarin or bifendate group, low dose EESN group (10 mg/kg) and high dose EESN group (30 mg/kg). Liver function was evaluated by detecting the levels of serum alanine aminotransferase (ALT) and aspartate aminotransferase (AST). The oxidize stress markers were measured, including malondialdehyde (MDA), glutathione peroxidase (GSH) and superoxide dismutase (SOD). Liver tissues were histopathologically examined by hematoxylin-eosin (H&E) staining. The acute toxicity study revealed that there was no toxicity of EESN at the dose of 5 g/kg in mice. The levels of ALT and AST in serum, and the MDA level in live tissues were significantly increased and the activities of SOD and GSH substantially decreased in mice after CCl(4) or D-GalN treatment. These biochemical and oxidize stress markers were profoundly improved after treatment with EESN at different doses, which was similar to the results of silymarin or bifendate treatment. The histophathological examination revealed the significant improvement in the pathological changes of the liver in EESN-treated mice as compared to those in CCl(4) or D-GalN group. It was concluded that EESN possesses potential antioxidant and hepatoprotective properties and has therapeutic potential for liver diseases.
Animals ; Ethanol ; chemistry ; Female ; Liver ; drug effects ; Male ; Mice ; Plant Extracts ; chemistry ; pharmacology

The present study examined the protective effect of the ethanol extract of Sarcopyramis nepalensis (EESN) on agents-induced hepatotoxicity in mice and the possible mechanism. Acute liver injury was induced by administration of either CCl(4) or D-GalN. The animals were divided into 5 groups in terms of different treatment: normal group, CCl(4) or D-GalN group, silymarin or bifendate group, low dose EESN group (10 mg/kg) and high dose EESN group (30 mg/kg). Liver function was evaluated by detecting the levels of serum alanine aminotransferase (ALT) and aspartate aminotransferase (AST). The oxidize stress markers were measured, including malondialdehyde (MDA), glutathione peroxidase (GSH) and superoxide dismutase (SOD). Liver tissues were histopathologically examined by hematoxylin-eosin (H&E) staining. The acute toxicity study revealed that there was no toxicity of EESN at the dose of 5 g/kg in mice. The levels of ALT and AST in serum, and the MDA level in live tissues were significantly increased and the activities of SOD and GSH substantially decreased in mice after CCl(4) or D-GalN treatment. These biochemical and oxidize stress markers were profoundly improved after treatment with EESN at different doses, which was similar to the results of silymarin or bifendate treatment. The histophathological examination revealed the significant improvement in the pathological changes of the liver in EESN-treated mice as compared to those in CCl(4) or D-GalN group. It was concluded that EESN possesses potential antioxidant and hepatoprotective properties and has therapeutic potential for liver diseases.