2.Rat intestine absorption kinetics study on cucurbitacin B-sodium deoxycholate/phospholipid mixed nanomicelles with in vitro everted gut sacs model.
Ling CHENG ; Bao-de SHEN ; Juan-juan LI ; Ling QIU ; Gang SHEN ; Li-hong ZHANG ; Jin HAN ; Hai-long YUAN
China Journal of Chinese Materia Medica 2015;40(14):2876-2881
To investigate the absorption kinetics of Cu B-SDC/PLC-MMs in rat different intestinal segments and compared with the absorption of Cu B suspension. The in vitro everted gut sacs model was established to study the absorption characteristics of Cu B-SDC/ PLC-MMs in rat duodenum, jejunum, ileum and colon, and the content of cucurbitacin B was detected by HPLC method, and the effects of concentrations on intestinal absorption were evaluated as well. The results showed that the absorption of Cu B-SDC/PLC-MMs was linearity at different intestine segment and different concentrations (R2 > 0.9), which was consistent with zero order rate process. The Ka of different intestine segments showed a concentration-dependent increasing along with the raised concentration of Cu B-SDC/ PLC-MMs, indicating that it was likely to be a mechanism of passive absorption. The best absorption site of Cu B-SDC/PLC-MMs was ileum, and its absorptions in different intestinal segments were superior to cucurbitacin B suspension. SDC/PLC-MMs could significantly enhance the intestinal absorption of cucurbitacin B, and the study of intestinal absorption kinetics of Cu B-SDC/PLC-MMs had gave a support to its further reasonable solidfication.
Animals
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Deoxycholic Acid
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administration & dosage
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Female
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Intestinal Absorption
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Kinetics
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Male
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Micelles
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Nanoparticles
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Phospholipids
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administration & dosage
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Rats
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Rats, Wistar
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Triterpenes
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administration & dosage
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pharmacokinetics
3.Effects of nitric oxide,endothelin-1, and liver sieve on biliary fibrosis in rats
Wenjun YANG ; Zhengming LEI ; Ling MA ; Daiyu LI ; Jing LI ; De SHI
Chinese Journal of General Surgery 2001;0(10):-
Objective To study the effects of nitric oxide (NO) and endothelin-1(ET-1) on cholestasis liver fibrosis. Methods Forty-eight Wistar rats were randomily divided into 3 groups:the control group,the common bile dute ligation(CBDL)group,and the CBDL plus lactulose group.The animals were killed on the 3rd,7th,14th, and 21th days respectively to determine the contents of plasma endotoxin,NO,ET-1, and transaminases(ALT,AST).The degree of hepatic fibrosis was observed by microscopy and the ultrastructural changes of liver were observed by electron microscope. Results After common bile dute ligation,the contents of plasma ET-1 and NO increased significahtly,the plasma endotoxin level also increased and there were positive correlation between the levels of ET-1,and NO and the level of endotoxin.Plasma transaminases also increased greatly compared with those of the control group.The hepatic sinusoidal steonsis and widen Disse space were found.The diameter and number of fenestrate on hepatic sinusoid greatly decreased.Treatment with lactulose could partially alleviate all the pathological changes noted above. Conclusions NO and ET-1 may damage the "liver sieve"to cause the cholestasis liver fibrosis.
4.CLONING OF NATTOKINASE GENE AND EXPRESSION IN E. COLI
Li-Xin LUO ; Zhi-Li HUANG ; Ru-De YANG ; Jun-Jian LING ; Shi-Zhong LIANG ;
Microbiology 1992;0(03):-
In this study, nattokinase gene was amplified by PCR using bacillus subtilis chromosomal DNA as template and cloned into expressed vector pBV220. After transforming recombinant plasmid into E.coli HB101, the recombinant strain was yielded. It was proved that expression products was secretive and expression protein was 12% of total cell protein by SDS-PAGE. Optimum culture time and inducing time was determined as 6h and 5h respectively. The plasmid stability studies showed that recombinant plasmid has excellent segregational stability but the structural stability was not good in the host cell.
5.Relationship between Imbalance of Suppressors of Cytokine Signaling 1/Suppressors of Cytokine Signaling 3 and Abnormal Activation of Monocytes/Macrophages in Children with Asthma
ying, ZU ; cheng-rong, LI ; de-fa, LI ; yao-jie, ZHENG ; hong-ling, MA
Journal of Applied Clinical Pediatrics 2006;0(16):-
Objective To investigate the relationship between the imbalance of suppressors of cytokine signaling 1(SOCS1)/SOCS3 and abnormal activation of monocytes/ macrophages in children with acute-phase asthma, and explore the molecular mechanism of chronic inflammatory process on airway.Methods The present study enrolled 20 asthmatic children and 20 age-matched normal children. Dual-color flow cytometric analysis was performal to detect the percentage of CD_ 80 、CD_ 86 expressing on CD_ 14 ~+ cell. Reverse transcriptase-polymerase chain reaction and real-time PCR were used to analyze SOCS1,SOCS3 expression in monocytes/ macrophages.Results The proportions of CD_ 80 ,CD_ 86 expressed on CD_ 14 ~+ cell in children with asthma were significantly higher than those in control subjects(CD_ 80 :7.0% vs 1.70%),(CD_ 86 :11.37% vs 2.03%),all P
6.The behavioral presentations of audio-visual integration in rats
Xiang-Yao LI ; Ling LI ; Ji-Ping ZHANG ; Xin-De SUN ;
Academic Journal of Second Military Medical University 1985;0(05):-
Objective:To study whether the orientation behavior of rats is affected by multi-sensory information.Methods: SD rats were randomly divided into 2 groups:the audio-visual integration group and pure audio group.The orientation behaviors of rats were observed after given single modal and multi-modal sensory cues with spatial disparities.Results:We found that when the temporal and spatial audio cues were coincident to a target visual cue,the rats had a markedly reduced reaction time and increased success rate in orientation behaviors;there was an obvious audio-visual integration effect.The integration effect was more obvious when the intensity of target visual cue was weak,with the enhancement efficiency being(87.3?8.5)%, significantly higher than that when the intensity of target visual cue was stronger(27.6%,P
7.A study of histopathological changes of small bowel allograft during acute rejection in rats
Shicheng LUO ; De SHI ; Hui YANG ; Ling LI ; Jun ZHU ; Jianhu GUO
Chinese Journal of General Surgery 2000;0(11):-
Objective To investigate the features and significance of pathologic changes in apoptosis of small bowel allograft during acute rejection in rats. Methods All 24 recipients were equally divided into four groups ; group A: nonoperative control; group B: allograft ; group C: isograft, group D: treatment control. The graft samples were harvested on day 3, 5, 7, 10 after transplantation, and subjected to histologic examination . Mucosal thickness, villous height and crypt depth were measured, and apoptotic cells of intestinal mucosa of grafts on day 3,5 and 7 after transplantation were examined. Results The mucosal structure was normal in group A; The degree of the inflammatory infiltrated cells ,intestinal mucosa cell apoptosis and structural injury of mucosa in group B were significantly severe compared with groups C and D. As the post-transplanted time increased, the number of musocal apoptotic cells and the degree of mucosal structural injury were significantly increased. The degree of mucosal structural injury in group C was milder than in group B. A few infiltrated cells and mild edema of mucosa occurred in group D , but no mucosal structural injury was found. Conclusions Inflammatory cell infiltration, mucosal epithelial cell apoptosis and mucosal structural damage are the main pathologic features of small bowel allograft during acute rejection. Dynamic observation of the pathologic changes and cell apoptosis of small bowel graft is of certain value in the diagnosis of acute rejection of small bowel graft and in assessment of the degree of small bowel injury.
8.Evaluation of therapeutic effect of acupuncture at Jiaji (EX-B 2) on hyperosteogeny of lumbar vertebrae.
De-hua LI ; Ling ZHAO ; Hong LIN
Chinese Acupuncture & Moxibustion 2005;25(8):534-536
OBJECTIVETo assess therapeutic effect of acupuncture at Jiaji (EX-B 2) on hyperosteogeny of lumbar vertebrae.
METHODSSeventy-two cases were treated with Huatuo jiaji (EX-B 2) of L2 approximately L5 as main acupoints, and their clinical therapeutic effects were assessed with Oswestry Disability Index (ODI).
RESULTSODI was 0.562 +/- 0.199 before treatment and 0.123 +/- 0.196 after treatment with a significant difference before and after treatment (P<0.01), and the effective rate was 94.4%.
CONCLUSIONAcupuncture at Jiaji (EX-B 2) can improve functional activity for the patient of hyperosteogeny of lumbar vertebrae.
Acupuncture Points ; Acupuncture Therapy ; Humans ; Lumbar Vertebrae
9.Multiplex RT-PCR assay for the detection of 8 kinds of respiratory viruses
De WU ; Yanling MO ; Lirong ZOU ; Hui LI ; Qiuxia CHEN ; Ling FANG ; Ping HUANG ; Changwen KE
Chinese Journal of Laboratory Medicine 2009;32(8):861-865
. Conclusions Two multiplex RT-PCR assays show high consistency with common RT-PCR. The multiplex RT-PCR assays were initially established.
10.Studies on chemical constituents of Zhuang medicine Excoecaria venenata and their cytotoxic activity.
De-sheng NING ; Xiao-xu YAN ; Si-si HUANG ; Ling CHENG ; Juan LI ; Zheng-hong PAN
China Journal of Chinese Materia Medica 2015;40(4):686-690
Fourteen compounds were isolated from 95% ethanol extract by silica gel, MCI, and ODS column chromatography. These compounds were respectively identified as quercetin (1), kaempferol (2), (+)-catechin (3), fraxin (4), protocatechuic acid (5), gallic acid (6), methyl gallate (7), ethyl gallate (8), apocynol A (9), baccatin (10), cerevisterol (11), ellagic acid (12), 3, 3',4'-tri-0-methylellagic acid(13) and N-benzoyl-L-phenylalaninyl-N-benzoyl-L-phenylalaninate(14) by analyzing their spectral data and comparing with the previously reported literatures. Except for gallic acid (6), all other compounds were isolated from this plant for the first time. Compounds 1, 2 and 6 showed moderate anti-proliferation activities on tumor cells.
Cell Line, Tumor
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Cell Proliferation
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drug effects
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Cell Survival
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drug effects
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Drugs, Chinese Herbal
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chemistry
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toxicity
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Euphorbiaceae
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chemistry
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Humans
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Plants, Medicinal
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chemistry
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Spectrometry, Mass, Electrospray Ionization