ABSTRACT
Background:Hydrotalcite has been used in the treatment of gastric ulcer,but its mechanism is not clear. Aims:To investigate the efficacy and mechanism of hydrotalcite on experimental gastric ulcer in rats. Methods:Experimental acetic acid-induced gastric ulcer model was established in rats. Model rats were randomly assigned into control group,low and high dose hydrotalcite groups,and 0. 9% NaCl solution,880 mg·kg - 1 ·d - 1 ,1 230 mg·kg - 1 ·d - 1 hydrotalcite were intragastrically administrated,respectively. After 14 days,macroscopic examination was performed;and HE staining, CD31 staining and VG staining were used to evaluate the histological maturity,AB-PAS staining,level of hexosamine, immunohistochemical staining,serum levels of epidermal growth factor( EGF),prostaglandin E2( PGE2 )were used to evaluate the functional maturity. Results:Compared with control group,ulcer index(UI)was significantly decreased in high dose hydrotalcite group(P < 0. 05). Thickness of restored mucosa was significantly increased(P < 0. 05),number of cystically dilated gland was significantly decreased(P < 0. 01),microvessel density(MVD),collagen fiber,secretion of mucus,level of hexosamine,expressions of EGF,EGR receptor(EGFR)and PGE2 ,serum levels of EGF and PGE2 were significantly increased in low and high hydrotalcite groups( P < 0. 05,P < 0. 01). Conclusions:Hydrotalcite could obviously improve the histological and functional maturity of regenerative mucosa,as well as the quality of ulcer healing. The mechanism might be related to the neutralization of gastric acid,enhancement of mucus-HCO3 - barrier and up-regulation of expressions of EGF and PGE2 .
ABSTRACT
Objective To clone and identify the heat shock factors(HSFs)of Schistosoma japonicum and analyze its molec?ular structure and alternative splicing pattern. Methods The New Zealand rabbits were infected with the cercariae of Schistoso?ma japonicum and were killed and dissected 42 days post?infection,and the adult worms of S. japonicum and the livers of the rabbits were harvested. Then,the total RNA was extracted by using Trizol reagent. The Sj?hsf open reading frame(ORF)and the alternative splicing fragments were amplified by RT?PCR from the female,male and egg samples,then cloned and verified by enzyme digestion and sequencing. DNAMAN 8.0,InterPro,Mega 6 combined with the Internet databases were utilized to clarify the gene structure,functional domains,alternative splicing pattern,and the homology and phylogenetic tree of HSFs. Re?sults Sj?hsf ORF and the alternative splicing fragments were amplified from the female,male and egg samples of S. japonicum by RT?PCR. After cloning,the positive recombinant plasmids pBSjHSFf?F,pBSjHSFf?M,pBSjHSFf?E containing Sj?hsf ORF, pBSjHSFs?F,pBSjHSFs?M,pBSjHSFs?E with Sj?hsf alternative splicing fragments were identified by enzyme digestion and se?quencing. Three alternative splicing Sj?hsf isoforms were observed through sequence analysis:Sj?hsf?isoform1(2 050 bp),Sj?hsf ?isoform2(2 086 bp)and Sj?hsf?isoform3(2 111 bp);the GenBank accession numbers were KU954546,KX119143 and KX119144,respectively. All the three isoforms located in the same Contig SJC_S000780 of S. japonicum genome and all ex?pressed at female,male and egg stages,but Sj?hsf?isoform1 with a high?level expression. Sj?HSF?isoform1(671 aa)and Sj?HSF?isoform2(683 aa)had DBD(DNA binding domain),HR?A/B and HR?C domains,while Sj?HSF?isoform3(282 aa)stopped in advance without HR?C domain. Phylogenetic tree analysis of HSFs illustrated that Sj?HSFs belonged to HSF1 family,with a close phylogenetic relationship to Sm?HSFs. Conclusions There are three alternative splicing isoforms of Sj?HSF existing in the female,male and egg stages of S. japonicum,but Sj?HSF?isoform1 expresses in a high?level. This study lays the foundation for further study on molecular mechanisms of Sj?HSFs in regulating the heat shock response system.
ABSTRACT
<p><b>OBJECTIVE</b>To examine the expression profile and immunofluorescence localization of the major egg antigen p40 of Schistosoma japonicum (Sjp40) during granuloma formation in the liver of infected New Zealand white rabbits.</p><p><b>METHODS</b>New Zealand white rabbits were infected with S. japonicum cercariae, and the livers were harvested at 29 and 45 days post-infection (dpi). The total RNA of the liver tissues was extracted for expression profiling of Sjp40 by quantitative reverse transcription-PCR (qRT-PCR) with GAPDH of S. japonicum as the endogenous reference gene. The expression of Sjp40 in the liver were detected by Western blotting using anti-Sjp40 monoclonal antibody (mAb) 9G7 or anti-Toxoplasma gondii tSAG1 mAb Y3A8 (control) as the primary antibody. Paraffin sections of the liver were prepared for observing egg granuloma formation using HE staining and for indirect immunofluorescence assay of Sjp40 location in the trapped eggs and egg granulomas.</p><p><b>RESULTS</b>The level of Sjp40 mRNA in the eggs trapped in rabbit livers was significantly higher at 45 dpi than that at 29 dpi (P<0.05), and Western blotting confirmed the presence of Sjp40 protein in the rabbit livers at both 29 and 45 dpi. Immunofluorescence assay demonstrated localized expression of Sjp40 in the immature eggs in the rabbit liver at 29 dpi, but at 45 dpi fluorescence was detected in clusters of mature eggs containing miracidium and in the surrounding egg granulomas.</p><p><b>CONCLUSIONS</b>The transcriptional levels of Sjp40 significantly increased with the maturation of eggs trapped in the rabbit livers. Sjp40 protein spread from the eggs to the surrounding egg granuloma at 45 dpi when acute liver granulomatous lesions occur, suggesting that Sjp40 plays a key role in egg granulomas formation in the livers of infected New Zealand white rabbits.</p>
Subject(s)
Animals , Rabbits , Antibodies, Monoclonal , Antigens, Helminth , Metabolism , Fluorescent Antibody Technique , Gene Expression Profiling , Granuloma , Parasitology , Helminth Proteins , Metabolism , Liver , Parasitology , RNA, Messenger , Schistosoma japonicum , Schistosomiasis japonicaABSTRACT
Objective To evaluate the short term clinical efficacy of recombinant human B‐type natriuretic peptide(rhBNP) in the treatment of dilated cardiomyopathy complicating heart failure .Methods 121 patients with dilated cardiomyopathy complicating heart failure were selected ,the cardiac function grade Ⅲ - Ⅳ ,and randomly divided into the conventional treatment group(control group ,n= 61) and the rhBNP treatment group(rhBNP group ,n = 60) .The disease history was recorded and clinical symptoms , heart color echocardiography ,cardiac function ,renal function and plasma NT‐proBNP levels were observed before and after treat‐ment .Results The NT‐proBNP level after 72 h treament in the rhBNP group was significantly lower than that in the control group (P< 0 .01) ;LVEDd after 1 week treatment in the rhBNP group was significantly lower than that in the control group ( P =0 .033) ;LVEF was increased in the both groups ,but the increase in the rhBNP group was more significant compared with the con‐trol group (P< 0 .01) .The total effective rate was 91 .6% in the rhBNP group and 72 .1% in the control group with statistical dif‐fernece between the two groups(P= 0 .005) ;the average hospital stay time in the rhBNP group was significantly shorter than that in the control group(P= 0 .041) .The proportion of the major adverse cardiovascular events(MACE) occurrence had no statistical difference between the two groups(P= 0 .492) .Conclusion rhBNP is safe and effective in treating the acute decompensation of di‐lated cardiomyopathy .
ABSTRACT
Objective To explore the efficacy of tepronone and folic acid in the treatment of chronic atrophic gastritis (CAG) evaluated by the marking targeting biopsy (MTB).Methods A total of 224 H.pylori negative CAG patients were selected and divided into group A (n 96,tepronone 50 mg/time,folic acid 10 mg/time,three times/day),group B (n=23,tepronone 50 mg/time,three times/day),group C (n=74,unspecific treatment) and group D (n=31,no treatment).The treatment course lasted for one year.The clinical symptoms improvement of each group was observed before and after treatment.The pathological improvement of gastric mucosa by MTB was inspected before and after treatment.The chi square test was performed for the comparison between groups.Results The total efficacy rates of group A,B,C and D were 43.8％ (42/96),39.1％ (9/23),33.8％(25/74) and 32.3％ (10/31) respectively,there was no significant difference between groups (x2 =2.328,P =0.507).For the significant efficacy rate of gastric mucosa pathological improvement,group A was compared with group D,group A was compared with group C and group B was comparedwith group D,the differences were significant (x2 =14.520,14.628 and 8.995,all P＜0.01).In the total efficacy rate of gastric mucosa pathological improvement,group A (49.8％,131/263) was compared with group D (24.2％,16/66),group A was compared with group C (35.9％,66/184)and group B (44.7％,21/47) was compared with group D,the differences were significant (x2 =13.953,8.535 and 5.207,all P＜0.05).Conclusion Teprenone alone or teprenone and folic acid combination can obviously improve pathological changes of CAG patients.
ABSTRACT
Objective To evaluate the efficacy of stomach intestine power regulator, intestinal microecology preparation and tricyclic antidepressant treatment in irritable bowel syndrome (IBS), and to investigate its pathological mechanism. Methods From November 2006 to November 2010, 103 patients with diarrhea-dominant IBS (D-IBS), who fulfilled the Rome Ⅱ criteria and were excluded from organic disease by entewscope were divided into pinaverium bromide group (26 cases), pinaverium bromide + bifid triple viable group (28 cases), pinaverium bromide + doxepin group (25 cases) and pinaverium bromide +bifid triple viable + doxepin group(24 cases ) by random digits table. The symptom grade, intestinal flora and SCL-90 was tested before treatment and 4 weeks after treatment. Results The total effective rate of pinaverium bromide + bifid triple viable + doxepin group was 83.33%(20/24), significant higher than that in pinaverium bromide group [65.38%(17/26)], pinaverium bromide + bifid triple viable group [71.43%(20/28)], pinaverium bromide + doxepin group [68.00% ( 17/25 )] (P < 0.05 ). Five kinds of intestinal flora and psychiatric symptoms were improved in the four groups, and those in pinaverium bromide + bifid triple viable + doxepin group improved significantly. Conclusions To interfere the correlation factor of IBS can have better efficacy. There is a close relation between brain and gut in patients with IBS, which may be involved in the pathogenesis of IBS.
ABSTRACT
OBJECTIVE:To analyse the advantages and disvantages of split tablets given to in-patients.METHODS:We collected13kinds of oral tablets(10tablets each kind and260pieces of the split tablet altogether),which were often splitted by pharmaceutists.We tested and analysed the weight variation of the split tablet on the basis of the dosage consistency metioned in the USP which is applied to the whole tablet.RESULTS:None of the13kinds of prescription drug passed the consistent testing after splitting.There was some relationship between the effect of the split tablet and its shape.It was relatively easy to break off the tablet with nick in half.The loss of dosage inevitably occurred during the process of splitting the tablet.CONCLUSION:Breaking off the tablet in half led to high ratio of weight variation.The modus operandi of splitting the tablet in half for saving expenses can only be applied to those drugs with low toxicities and relatively flat dose-effect curve.In the case of those drugs which bear high toxicities and steep dose-effect curve,carefulness should always be taken when applying such method.