Humans ; Noise, Occupational ; adverse effects ; Occupational Exposure ; standards

Objective To investigate the clinical characteristics and treatments of early-stage acute pancreatitis following laparoscopic cholecystectomy (LC). Methods From April 1998 to June 2006,totally 18 470 cases of LC were performed in our hospital,16 (0.09%) of them developed early-stage acute pancreatitis (

Objective To summarize the clinical experience of laparoscopic cholecystectomy (LC) in the treatment of acute cholecystitis. Methods A total of 93 cases of acute cholecystitis treated by LC from May 2003 to May 2005 was retrospectively reviewed, including 15 cases of preoperative endoscopic retrograde cholangiopancreatography (ERCP) combined with endoscopic sphincterotomy (EST) for common bile duct stones and 6 cases of intraoperative cholangiography. The LC was performed within 48 hours after admission. Results The LC was successfully completed in 91 cases (97.8%), whereas a conversion to open surgery was required in 2 cases (2.2%). The operation time was 35~160 min (mean, 65 min). Postoperatively, biliary leakage occurred in 3 cases (3.2%) and residual stones in the common bile duct were found in 3 cases (3.2%), which were all cured by open surgery combined with ERCP, EST, and endoscopic nasobiliary drainage (ENBD). No iatrogenic injuries happened. Conclusions With proper selection of ERCP and EST, LC for the treatment of acute cholecystitis is feasible and safe. But the incidence of conversions and complications may be high.

Action Potentials ; drug effects ; Animals ; Cadmium ; toxicity ; Guinea Pigs ; Male ; Myocytes, Cardiac ; drug effects ; physiology

Objective To evaluate the inhibitory effect of highly selective M4 receptor antagonist MT3 on the form deprivation myopia in guinea pigs and its potential mechanism. Methods Thirty?two healthy male guinea pigs were ran?domly divided into three groups:control group, form deprivation group, and form deprivation + MT3 group, 8 animals in each group. Refraction was measured by retinoscopy after cycloplegia before and after the experiment. The ocular biological dimensions were measured by A?scan ultrasound. RT?PCR was used to detect the relative expression of TGF?β2 mRNA in the retina and choroid. Results Compared with the right eyes of control group, the right eyes of form deprivation + MT3 group developed relative myopia of -1?44 ± 0?50 D (right?left eye) (P =0?001). The vitreous chamber depth and axial length of the right eyes were significantly prolonged by 0?10 ± 0?02 mm and 0?14 ± 0?07 mm (P<0?001, P<0?001), respectively, but the increases of myopia and axial length were significantly smaller than that of the form deprivation group (P<0?001, P<0?001, P<0?001). Down?regulation of relative mRNA expression of TGF?β2 in retina and choroid was found in the form deprivation group (P<0?001, P =0?014) compared with the right eyes of the control group, while up?regulation of relative mRNA expression of TGF?β2 in retina and choroid was found in the form deprivation + MT3 group ( P<0?001, P<0?001). Conclusions MT3 can inhibit the development of form deprivation myopia in guinea pigs, which may play an important role by the regulation of TGF?β2 mRNA level in the retina and choroid.

Objective To investigated the expression of scavenger receptor A(SR-A) and lipopolysaccharide(LPS) receptor CD14 in endotoxin-induced acute liver injury.Methods Ninety Wistar rats were randomly divided into endotoxaemia group(LPS group) and normal saline group(NS group).The model of endotoxaemia and acute endotoxin-induced liver injury was established by injection of endotoxin(5mg/kg) via tail veins in LPS group,while the rats in NS group received injection of 0.2ml normal saline as control.At 0,1.5,3,6,12h after injection,the levels of endotoxin,TNF-?,IL-1,alanine transaminase(ALT) and total bilirubin(TB) in plasma,SR-A and CD14 expressions in liver tissues were determined,pathological changes of liver tissues and ultrastructural changes of Kupffer cells(KCs) were observed by light and electron microscopy respectively,while the phagocytosis of KCs was determined too.Results Compared with NS group,KCs were activated on morphology and functions(proliferated diffusely,enlarged in size and increased in phagocytosis function),levels of TNF-? and IL-1 increased markedly,the pathological changes of cell degeneration and necrosis and the liver function were gradually aggravated,while SR-A expression decreased and CD14 expression increased obviously(P

Objective: To prepare Danshen Injection (Radix Salviae Miltiorrhizae) by micelle-ultrafiltration. Methods: For preparing Danshen Injection, we packed the impurities in the macrofiltered liquor of Radix Salviae Miltiorrhizae with micelle of Tween-80, and ultrafiltered the compounds with ultrafiltration membrane withholding molecular weight more than 50000. Then we evaluated the process with the comprehensive indexes including loss rate of UV absorbance, loss rate of Protocatechualdehyde and the stability of transparence. Conclusion: The process of Danshen Injection prepared by micelle-ultrafiltration is better than that of ordinary ultrafiltration.

Objective To investigate the protein expression of cyclooxygenase(COX)-2 and matrix metalloproteinase(MMP)-2 and their correlation in human gastric carcinoma.Methods The protein expression of COX-2 and MMP-2 was determined by immunohistochemistry in tumor tissues and adjacent cancerous tissues (3 cm and 6 cm away from tumor margin) of 30 patients with gastric cancer,and in gastric mucosa of 10 healthy individuals.Results Expression of COX-2 was found in cancer cells of 26 out of 30 cases (86.67%),which was significantly higher than that in normal control (0 of 10,P

Objective: To determine the inhibitory effects of anti-bone sialoprotein(BSP) antibody on human breast cancer cells adhering to bone matrix in vitro.Methods: Expression of BSP in 3 different cancer cell lines(bone seeking breast cancer cell MDA-MB-231-BO,lung adenocarcinoma cell SPCA-1 and colon carcinoma cell LOVO)was detected immunohistochemically.Cells adhering test was carried out to investigate the adhering of the 3 different cancer cell lines to mouse bone matrix in vitro and the inhibitory effect of anti-BSP antibody on MDA-MB-231-BO cells adhering to mouse bone matrix;Enzyme-linked immunosorbent assay was carried out for quantitative detection of TGF-?.Results: BSP immunostaining was positive in MDA-MB-231-BO cells and negative in SPCA-1 and Lovo cells.The number of MDA-MB-231-F10 cells adhering to mouse bone matrix was significantly more than SPCA-1 or Lovo cells(P

Objective: To investigate the pathological changes of human hepatocellular carcinoma (HCC) after continuous passaging in nude mice. Methods: The mice model of HCC SMMU-LTMN were continuously observed for 20 years (1987-2007) . The subcutaneously transplanted carcinoma had been passaged for 228 generations. The pathological data of abdominally transplanted HCC, orthotopically transplanted HCC in nude mice, and orthotopically transplanted HCC in NOD-SCID mice were recorded. The pathological studies were conducted by light microscope, electron microscope, image analysis, chromosomal analysis, and measurement of alpha-fetoprotein (AFP) in peripheral blood. Results: (1) The local invasion and metastasis of of tumors were present in all the above 4 models for a long time. The local invasion rate and the pulmonary metastasis rate of subcutaneously transplanted tumors were 59.70% (40/67) and 37.10% (23/62), respectively. The pulmonary metastasis rate of abdominally transplanted tumors was 59.02%(36/61). The intra-hepatic and pulmonary metastasis rate of the othotopically transplanted tumors were 18.18%(4/22) and 31.82% (7/22), respectively. The pulmonary metastasis rate of HCC in NOD-SCID mice was 53.85%. (2) The tissue structure and the differentiation of the 10th generation tumor cells was similar to those of primary HCC, with grade 2 differentiation and coarse trabecular pattern as the main characteristics. From the 11th generation to the 228th generation, the main characteristics of tumor cells were grade 3 differentiation and lump pattern. Electron microscope also showed worse differentiation. (3)The AFP level was 92 500 ?g/L in cells before the 32th generation; it decreased to 6 729?g/L from the 33th-130th generation cells; and the level of the 220th generation was 1 000-5 000 ?g/L.(4)The DNA contents had a wide distribution (from 2c to 6c) in abdominally transplanted tumors and the pulmonary metastatic tumors; the mean DNA index in the former tumors (2.60?0.20) was wider than the that in the latter (2.10?0.26) . (5)From the 55th generation to 206th generation, it was found that tumor cells had integrated into the chromosome of the nude mice. Conclusion: The subcutaneously transplanted HCC in nude mice can be stably expressed for 20 years, with no change in the local invasion and metastasis ability of HCC. The differentiation of the tumor cells worsenes and the AFP level is decreased in the blood; some chromosome of tumor cells integrate into the chromosome of nude mice, which may be related to the internal environment of nude mice and the multi-potential differentiation of the tumor cells.