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To observe the effect of indomethacin suppository 100 mg before endoscopic retrograde cholangiopancreatography (ERCP) on the level of platelet microparticles (PMPs) in patients with post-ERCP pancreatitis (PEP). A total of 191 patients receiving ERCP were collected from June 2019 to October 2020 in the First Affiliated Hospital of Anhui Medical University and were randomly divided into the indometacin group ( n=96) and the control group ( n=95) by random number table method. The indometacin group received 100 mg indometacin suppositories before ERCP and the control group received placebo of equal quality. Levels of PMPs before operation, 3 hours and 24 hours after operation were measured by flow cytometry. The levels of IL-1, IL-6 and TNF-α in the plasma before ERCP, 3 hours and 24 hours after ERCP were also detected. The incidence of PEP in the indometacin group was 5.21% (5/96), which was significantly lower than that in the control group [13.68% (13/95), P=0.044]. The preoperative PMPs level in the indometacin group (1 910.01/μL) was slightly lower than that in the control group (2 351.87/μL) with no significant difference ( P>0.05). The PMPs levels in the indometacin group 3 hours and 24 hours after ERCP (1 671.47 /μL, 862.74/μL) were significantly lower than those of the control group (2 443.75/μL, 2 536.76/μL, both P<0.05). Inflammatory cytokines including IL-1, IL-6 and TNF-α showed the same tendency. Indometacin can reduce the incidence of PEP, for the reason that indometacin may decrease the levels of PMPs.
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Objective To investigate the endoscopic ultrasound (EUS) features of distal biliary stricture (DBS), and to provide a clinical basis for the evaluation of DBS by EUS. Methods Related clinical data were collected from 175 patients with DBS who underwent EUS examination in The First Affiliated Hospital of Anhui Medical University from April 2016 to March 2020 to analyze their clinical manifestation, laboratory examination results, imaging findings, and EUS findings, and the patients were followed up to summarize the EUS features of DBS. The chi-square test was used for comparison of categorical data between groups, and the t -test was used for comparison of continuous data between groups. Results Among the 175 patients with DBS, 85(48.57%) had benign DBS and 90(51.43%) had malignant DBS. Compared with the patients with benign DBS, the patients with malignant DBS had a significantly longer length of stricture on EUS (14.1±3.0 mm vs 7.9±3.0 mm, t =13.358, P < 0.001) and significantly higher incidence rates of the characteristic changes on EUS such as hypoechoic space-occupying lesions in lumen (57.8% vs 34.1%, χ 2 =9.843, P =0.002), peripheral lymph node enlargement (26.7% vs 12.9%, χ 2 =5.147, P =0.023), and pancreatic duct dilatation (51.1% vs 28.2%, χ 2 =9.532, P =0.002). EUS combined with magnetic resonance cholangiopancreatography had a sensitivity of 70.6% in the diagnosis of benign DBS and a sensitivity of 92.2% in the diagnosis of malignant DBS. Conclusion The characteristic EUS features of DBS, such as long length of stricture, hypoechoic lesion, peripheral lymph node enlargement, and pancreatic duct dilatation, may help with the differential diagnosis of DBS in clinical practice.
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It is of great importance to measure the lesion area in scientific research and clinical practice. The present study aims to solve barrel distortion and measure lesion area with the technology of computer visualization. With the ultimate purpose to obtain the precise lesion area, the study, based on the original endoscopy system and digital image processing technology, dealt with the correction of barrel distortion by lens adjustment, calculated the gastric ulcer area with the aid of Qt database and finally developed an image processing software--Endoscope Assistant (EAS). The results showed that the EAS was accurate in vitro. It was employed to measure the gastric ulcer area of 45 patients and the results were compared with the traditional formula method. It could be well concluded that this technology is safe, accurate and economical for measuring gastric ulcer area.
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Humans , Algorithms , Gastroscopy , Methods , Image Enhancement , Image Processing, Computer-Assisted , Methods , Software , Stomach Diseases , Diagnosis , PathologyABSTRACT
Objective To determine the pathway of macrophage metalloelastase (MME)generate active angiostatin by decomposing plasminogen and its effect on inhibiting growth of tumor and microvessel density (MVD) in vivo in mouse models. Methods The recombined plasmid pEGFPC1-MME was constructed. Thirty mice were subcutaneously inoculated with CT-26 cells that were stably transfected with pEGFP-C1-MME (MME-transfected group), 30 with CT-26 cells transfected with empty vector pEGFP-C1 (vector-transfected group) and 30 with CT-26 cells (non-transfected group). Radioiodination and radioisotope tracer were used to explore the pathway of angiostatin generation in vivo. Results SDS-PAGE electrophoresis analysis revealed that, in the PAGE gel contained the protein with molecular weights of 35 000 and 38 000, radioactivity in MME-transfected group was significantly higher than vector-transfected and non-transfected groups (P = 0. 00).Western blotting analysis demonstrated two bands containing 35 000 and 38 000 fragments in three groups. Quantification of the protein signals by image analysis revealed that the levels of 35 000 and 38 000 fragments were obviously increased in MME-transfected group (9.32±1.52 and 5.61±2.24,respectively) than those in vector-transfected (2.47 ± 0.23 and 0. 67 ± 0. 12, respectively) and nontransfected (1.21±0. 69 and 0. 86 ± 0.44, respectively) groups (P= 0.00). The average value of MVD and fluorescent express of vascular endothelial growth factor (VEGF) were lower in MMEtransfected group when compared with those in vector-transfected and non-transfected groups (P =0.00). The average tumor size in MME-transfected group was small in comparison with vectortransfected and non-transfected groups (P= 0.00). Conclusions MME is demonstrated to be one of matrix metalloproteinase that closely related with angiostatin production and has inhibitory effect on tumor growth in tumor-bearing mice.
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Aim To establish the method of detecting the Arylamine N-acetyltransferase-1(NAT1) genotype and its distribution of polymorphism,and analyze the correlation between the genotype and the phenotype in a Chinese Hans population.Methods The peripheral blood samples from 140 Han people were collected and analyzed for NAT1 genotypes by multiple PCR and PCR-RFLP method.The NAT1 enzyme kinetics in leukocytes in 32 persons with different genotypes from 140 Han people,were determinated for NAT1 phenotype by HPLC,the values of intrinsic clearance(Clint) and V_(max) and Michaelis constant(K_m) of NAT1 were calculated for evaluation of para-aminobenozic acid as a specific substrate.Results The NAT1 genotype of Chinese Hans population was distinguished accurately by multiple PCR and PCR-RFLP methods,and was not interfered by the interaction of several restriction endonucleases.The allelic frequencies of NAT1~*3,NAT1~*4,NAT1~*10 and NAT1~*11 from 140 Han people,were 0.082,0.496,0.40 and 0.022,respectively.The frequency of NAT1~*4 allele was significantly lower than that of Caucasian populations,but higher than that of Southeast Asia and African.Frequencies of NAT1~*3 and NAT1~*11 allele were comparable with those of many Asian populations,but the frequency of NAT1~*10 allele was higher than that of in Europe and America populations.Compared with the activity of wild genotype NAT1 ~*4/~*4,activities of the homozygote or heterozygote NAT1~*10 genotypes which include the NAT1 ~*4/~*10,the NAT1 ~*10/~*10 and the NAT1 ~*10/~*3 were higher significantly(P
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Objective To evaluate the diagnostic accuracy of drug-induced liver injury over a 10-year period . Methods The 112 cases of drug-induced liver injury were retrospectively studied. Inter-national consensus criteria were applied to assess the causality of suspected drug hepatotoxicity,in which the chronological criteria and elimination of other causes were analysed. Results Among 1127 adult inpatients with acute hepatitis over 10-year period, 112 patients(10%) were recorded as drug-induced liver injury. Based on the causality assessment of 112 cases, either incompatible time to apparent onset of the reaction or incompatible course of the reaction was found in 60 cases(53.6%) and 20 cases(17.9%), respectively. The presence of other possible causes for the reaction was found in 34 patients (37.5%). Therefore, 26 cases(23.2%) of liver injury were related to the incriminated drug, 25 cases(22.3%) unrelated,61(54.5%) were considered to indeterminate cause. Conclusions The international consensus criteria were helpful to identify drug-related or unrelated liver injury, but more than half of reported hepatic adverse drug reactions are still in suspected condition. The current diagnostic methods for drug-induced liver injury are needed to be revised in clinical practice.