Altitude ; Animals ; CA1 Region, Hippocampal ; metabolism ; physiology ; Male ; Neural Cell Adhesion Molecules ; metabolism ; Rats ; Rats, Sprague-Dawley ; Time Factors

AIM: To observe the tear film changes after phacoemulsification combined with intraocular lens implantation in age - related cataract patients and to compare the therapeutic effect of hydroxyl-glucoside and sodium hyaluronate on the postoperative dry eye.
METHODS:A total of 49 patients ( 70 eyes ) with age-related cataract suffering from dry eye after phacoemulsification combined with IOL implantation were divided into treatment group 1 ( group A, 23 eyes with conventional therapy and hydroxyl - glucoside at 7d postoperatively) , treatment group 2 ( group B, 22 eyes with conventional therapy and sodium hyaluronate at 7d postoperatively) and control group ( group C, 25 eyes with conventional therapy only ) . Questionnaire score of dry eye symptoms, SchirmerⅠtest ( SⅠt) , tearfilm break up time ( BUT ) and corneal fluoresce in staining ( CFS ) were measured at 2d preoperatively and 7, 14, 30, 90d postoperatively.
RESULTS: No statistical differences existed among the three groups of preoperative 2d ( P > 0. 05 ). At 2d preoperatively and 90d postoperatively, the results of questionnaire score of dry eye symptoms, SⅠt, BUT, and CFS displayed no statistical differences in the patients of three groups (P>0. 05). While there was statistical significance among preoperatively and 7, 14, 30d postoperatively of the three groups (P<0. 05). At 14, 30d postoperatively, the questionnaire score of dry eye symptoms, SⅠt, BUT, CFS in group A and B were better than in group C, which displayed statistical differences ( P<0. 05). At 30d postoperatively the questionnaire score of dry eye symptoms , SⅠt, BUT in group B were better than in group A, which displayed statistical differences ( P<0. 05).
CONCLUSION: At the early stage after phacoemulsification combined with IOL implantation, the tear film stability is decreased, which may promote eyesymptoms. Management with hydroxyl-glucoside or sodium hyaluronate plays a role in relief of the structure and stability of the tear film and improves dry eye symptoms, while sodium hyaluronate eye drops is more effective.

AIM: To analyze the effect of pigment epithelium derived factor (PEDF) on nitrogen monoxide (NO) and expression of cysteine-containing, aspartate-specific proteases-3 (caspase-3) in retinal tissues of model rats with optic nerve crush injury.METHODS: A total of 60 SD rats were randomly divided into the blank control group, model group and PEDF group, with 20 rats in each group.Except the blank control group, the optic nerve crush injury rat models were established in the other groups, and left eyeballs were taken as samples.After successfully modeling, the model group were treated with intravitreal injection of 5μL of balanced salt solution while PEDF group were treated with intravitreal injection of 5μL of PEDF (0.2μg/μL).Two weeks later, the retinal tissues were collected, and changes of shape were observed under microscope after HE staining.The changes of NO level were measured by colorimetry assay, the expression of caspase-3 mRNA and caspase-3 protein was detected by reverse transcription-polymerase chain reaction (RT-PCR) and Western-blot.RESULTS: HE staining showed that retinal tissues of the blank control group arranged neatly and clearly.Retinal ganglion cells (RGCs) arranged in a monolayer, and cells were oval, uniform in size and distribution, the cell nuclei were clear, closely arranged, with clear boundaries.The retinal tissues of the model group were sparse in shape, RGCs showed vacuolar changes, the overall number of cells was reduced, and cell nuclei of residual RGCs showed pyknosis and uneven staining.RGCs in PEDF group were with slightly edema and arranged closely, and the degree of injury was significantly milder than that in the model group.Levels of Caspase-3 mRNA and protein and NO levels in the three groups showed the model group > PEDF group > blank control group (all P < 0.05).CONCLUSION: The application of PEDF can down regulate the expression of Caspase-3 and NO in rates with optic nerve injury and reduce RGCs injury.

Objective To observe the MRI findings of normal pancreas in piglets. Methods Eight healthy piglets underwent MR examination, and the morphology, size, signal intensity of pancreas were observed. After MR imaging, all piglets were abdominally incised to observe the anatomy of pancreas and pancreatic adjacent structures. The opening of both common bile duct and pancreatic duct were detected during operation. Two piglets were sacrificed after operation and the whole pancreases were dissected for anatomic research. Results The pancreas of piglets was composed of three parts: right lobe, median lobe and left lobe. All the lobes were displayed clearly on MRI. The signal intensity of pancreas was higher than that of liver and spleen on T1WI, whereas lower than that of liver and spleen on T2WI. On MRCP, pancreatic duct was not presented, whereas the common bile duct could be seen clearly. The opening of common bile duct located at superior part of duodenum (nearby the pylorus) and the opening of pancreatic duct situated at duodenal papilla corresponding to pancreatic right lobe. Conclusion MRI can show the pancreas of piglets very well. The morphology of pancreas and features of common bile duct conjunction with pancreatic duct in piglet are different from those in human.

Objective To study MRI findings of pancreatic ducts of piglets with chronic pancreatitis (CP) induced by pancreatic duct ligation and analyze the relationship between pancreatic duct changes in piglets with CP and the pathological severity of CP. Methods Thirty healthy piglets were included in this study. Five piglets were randomly selected as normal control group, and the remaining 25 piglets were served as the experimental group. The duct ligation operations were performed on experimental group. After 2 to 18 weeks, pancreas and pancreatic ducts were observed on MRI. Then the pancreas was removed and graded into three types by histopathology. The relationship between the diameter of pancreatic duct or the pancreatic branch displaying rate and the severity of CP was analyzed by Spearman correlation coefficient. Results CP was found in 21 piglets( 84. 0% ) in the experimental group including mild ( n = 7 ), moderate ( n = 8 ) and severe( n = 6) pancreatitis. Pancreatic ducts were shown in mild CP and the edge of pancreatic ducts was irregular in three cases. The dilated RPD, LPD and MPD constituted the "person" form in moderate and severe CP. The diameter of pancreatic ducts was(0. 9 ±0. 3)mm, (2. 9 ± 1.4)mm and (4. 8 ± 1.2)mm in mild, moderate, and severe CP respectively. The expansion extent of pancreatic ducts was correlated with the severity of CP of piglets (r = 0. 837, P ＜ 0. 05). The pancreatic branch displaying rate increased with the increase of the severity of CP ( r = 0. 990, P ＜ 0. 05 ); the displaying rate was 0/7 for mild, 3/8 for moderate, and 5/6 for severe CP. Conclusions The dilated pancreatic ducts with "person" form in piglets with obstructive CP created by pancreatic duct ligation. The pancreatic duct changes on MRI reflect the severity of CP of piglets.

The present study is to elucidate the mechanisms underlying Gleevec-induced apoptosis of chronic myeloid leukemia (CML) K562 cells in vitro. The apoptotic cell death and cell cycle distribution after Gleevec treatment and the effect of PDCD4 siRNA on Gleevec-induced apoptosis of K562 cells were analyzed by flow cytometry. The effect of Gleevec on p-Crkl, caspase-3, PARP and PDCD4 protein levels, and the knockdown efficacy of PDCD4 siRNA were detected by Western blotting. The results showed that Gleevec dramatically suppressed the phosphorylation level of Crkl in a dose-dependent manner and induced significant apoptosis and G0/G1 cell cycle arrest of K562 cells in time- and dose-dependent manners. In addition, Gleevec activated caspase-3 and its downstream substrates PARP, and the caspase pan inhibitor Z-VAD-FMK (50 micromol x L(-1)) markedly reduced Gleevec-induced apoptosis from 47.97% +/- 10.56% to 31.05% +/- 9.206% (P < 0.05). Moreover, Gleevec significantly increased the protein expression of programmed cell death 4 (PDCD4). PDCD4 knockdown by siRNA reduced Gleevec-induced apoptosis from 46.97% +/- 14.32% to 42.8% +/- 11.43%. In summary, Gleevec induced apoptosis in K562 cells via caspase-3 activation.
Amino Acid Chloromethyl Ketones ; Apoptosis ; drug effects ; Benzamides ; pharmacology ; Caspase 3 ; metabolism ; Cell Cycle ; drug effects ; Humans ; Imatinib Mesylate ; K562 Cells ; Phosphorylation ; Piperazines ; pharmacology ; Pyrimidines ; pharmacology

Objective:To investigate the influence of sCD80-Linker-sCD40L fusion protein on the unspecific anti- tumor immunity in vitro.Methods:Ovarian cancer SKOV3 cells were separately transfected with recombinant adenoviral vectors containing sCD80-Linker-sCD40L fusion gene,sCD80 gene,sCD40L gene or with control adenovirus.The expres- sion of the sCD80-Linker-sCD40L fusion protein,sCD80 protein and sCD40L protein in the supernatants of SKOV3 cells was determined by ELISA.Dendritic cells(DCs)were cultured with peripheral blood mononuclear cells from a patient with ovarian carcinoma.DCs and autologous T cells were co-cuhured and were exposed to different supernatants for 48 h. The allostimulatory effects of DCs on T cells were determined by mixed lymphocyte reaction(MLR).The unspecific kill- ing activities of induced T cells against SKOV3/K562 cells were measured by LDH-releasing assay.Results:ELISA assay showed that levels of the sCD80-Linker-sCD40L fusion protein,sCD80 protein and sCD40L protein in the supernatants of transfeced SKOV3 cells were 2.791 ng/ml,1.956 ng/ml and 1.407 ng/ml,respectively.The fusion protein-exposed DCs ([0.382?0.053]vs[0.167?0.028],P

Objective To study the effects of salt sensitivity on evolution of blood pressure and develope- ment to hypertension from adolescents to youth.Methods A baseline survey was carried out in 4623 adolescents aged 6-15 years old in Hanzhong rural area in 1987,310 of them were recruited for determination of salt sensitiv- ity using the tests of oral saline load and furosemide sodium-volume depletion.Salt sensitivity (SS) were diag- nosed in 101 while 209 subjects as no-sah sensitivity (NSS).This cohort of adolescents were followed up for av- erage 18 years.Results The response rate for this cohort of adolescents was 71.9%.At the end of follow up period,BP in subjects with baseline SS was higher in youth than that in NSS (SBP:122.9?13.1 vs 117.3?12.4, P

OBJECTIVETo investigate the clonal origin of the apoptotic hematopoietic cells in myelodysplastic syndromes (MDS).

METHODSNineteen patients with MDS whose karyotypes had been analysed with G- or R-binding were studied. ISEL (DNA in situ end labelling) and FISH (fluorescence in situ hybridization) (simplified as ISEL/FISH) were performed simultaneously in a single nucleated cells on cytospin slides in 10/19 of the patients. The ratio of FISH positive cells to all nucleated cells and to apoptotic cells were counted. Eight slides from 4 normal donors induced apoptosis by Fas monoclonal antibody (McAb) were used as methodology control. For the rest 9 patients, different fractions of cells (PI-, Annexin V+PI-, Annexin V-PI-) were sorted by flow cytometry and then cytospined for FISH analysis (simplified as FCM/FISH).

RESULTSThe mean percentage of abnormal clonal cells in nuclear cells in the 10 cases detected by ISEL/FISH was 37.1%, whereas it was 24.0% in apoptotic cells. Induction by Fas McAb didn't lead to change of karyotype. Moreover, 8/9 patients analysed by FCM/FISH showed higher cell proportion with normal karyotypes in apoptosis-undergoing cells than that in non-apoptotic cells.

CONCLUSIONOver apoptotic hematopoietic cells in MDS are mainly residual normal hematopoietic cells.

Adult ; Aged ; Aged, 80 and over ; Apoptosis ; Bone Marrow Cells ; metabolism ; pathology ; Cells, Cultured ; Clone Cells ; metabolism ; pathology ; Female ; Flow Cytometry ; Humans ; In Situ Hybridization, Fluorescence ; In Situ Nick-End Labeling ; Karyotyping ; Male ; Middle Aged ; Myelodysplastic Syndromes ; genetics ; metabolism ; pathology ; fas Receptor ; metabolism

ObjectiveTo observe the effect of rhubarb as the main composition in the therapy for patients with acute paraquat poisoning (APP).MethodsA prospective randomized controlled trial was conducted. 128 patients with APP admitted to Harrison International Peace Hospital from March 2011 to December 2013 were randomly divided into western medicine control group (n = 64) and western medicine and traditional Chinese medicine (TCM) combination group (n = 64). All the patients were treated with repeated gastric lavage and oral kaolin. The patients in western medicine control group were given 20% mannitol and (or) magnesium sulfate for catharsis, early (within 8 hours of admission) hemoperfusion (HP), and also given the routine combined therapy. In TCM combination group, in addition to the above treatment patients were given oral paraquat poisoning detoxification prescription No.1 every 2 hours for catharsis, which was composed of rhubarb 10 g, glauber salt 12 g, agrimony 12 g, and licorice 6 g. When green stool disappeared, detoxification therapy was changed to No. 2 compound once a day for 14 days, which was consisted of rhubarb 10 g, ginseng 6 g, agrimony 15 g, rhizoma chuanxiong 10 g, licorice 6 g. The poison volume, first dose of oral drug, time for the first HP, time of the first defecation, the time of last green stool, decontamination time, white blood cell count (WBC), C-reactive protein (CRP), arterial blood gas analysis, blood lactic acid (Lac), liver and kidney functions, myocardial enzyme spectrum, chest CT, adverse reaction, days of hospitalization, and mortality rate were observed in both groups. The levels of paraquat in plasma and urine were determined before treatment and 12 hours after poisoning in both groups. Sixty days after discharge, chest CT was taken for observation of pulmonary fibrosis. ResultsThere were no significant differences in the poison volume, ingestion time and the time for the first HP between the two groups. Compared with western medicine control group, the first defecation time (hours: 3.94±1.14 vs. 6.17±1.52), the last time of green stool (hours: 36.90±4.10 vs. 51.63±4.91), and poison clean-up time from plasma (hours: 19.48±3.63 vs. 23.84±3.29) in combination with TCM group were significantly earlier (allP< 0.01). WBC, CRP, alanine aminotransferase (ALT), blood urea nitrogen (BUN), and serum creatinine (SCr) levels were gradually increased after admission in combination with TCM group, and they peaked on 5th day [WBC (×109/L): 15.35±2.17 vs. 17.47±2.09, CRP (mg/L): 32.62±2.76 vs. 39.51±2.45, ALT (U/L): 270.88±11.06 vs. 334.67±7.85, BUN (mmol/L): 13.29±1.90 vs. 17.63±1.42, SCr (μmol/L): 203.54±18.40 vs. 251.53±14.38, allP< 0.05], and then they declined; Lac after admission was gradually increased, and peaked at 7 days (mmol/L: 3.53±0.21 vs. 3.82±0.14, P< 0.05), and then it was decreased. Myocardial enzyme spectrum was increased after admission, and peaked on 3rd day [creatine kinase (CK, U/L): 192.09±16.26 vs. 216.20±11.96, creatine kinase isoenzyme enzyme (CK-MB, U/L):39.03±3.75 vs. 47.22±5.84, bothP< 0.05), and then they declined gradually. Arterial partial pressure of oxygen (PaO2) and base excess (BE) were gradually decreased after admission, down to trough on the 7th day after admission [PaO2 (mmHg, 1 mmHg = 0.133 kPa): 87.04±2.37 vs. 84.93±2.44, BE (mmol/L): -7.31±2.31 vs. -9.18±2.49, bothP< 0.05], and then they were increased. At 12 hours after poisoning, paraquat contents in plasma and urine in combination with TCM group were significantly lower than those of the western medicine control group [plasma (ng/L):0.83±0.08 vs. 0.96±0.10, urine (ng/L): 0.88±0.09 vs. 0.97±011, bothP< 0.05]. The injury to lung tissue was significantly improved in combination with TCM group compared with that in the western medicine control group, and no serious adverse reactions was found, and the hospital stay time (days: 20.46±6.07 vs. 29.73±9.16) was significantly shortened (P< 0.01), and the mortality rate [35.9% (23/64) vs. 45.3% (29/64)] was significantly lowered compared with western medicine control group (P< 0.05). In the combination with TCM group pulmonary fibrosis was lighter than that in the western medicine control group during the 60-day follow-up. ConclusionThe sequential treatment of No. 1 and No. 2 detoxification of APP, using rhubarb as the main drug, can effectively eliminate paraquat, reduce absorption of the toxin, prevent the development of multiple organ dysfunction syndrome (MODS) induced by the toxin, shorten the hospital stay days, and improve the prognosis of APP.