Objective To study the function of liver stem cells during at liver regeneration(LR) at transcriptional level.Methods The liver stem cell growth-and differentiation-related genes were obtained by data collection and literature review,and the gene expressions in rat regenerating liver were checked by Rat Genome 230 2.0 array.The relativity of the LR-associated genes was identified by comparing the discrepancy of gene expression changes between partial hepatectomy(PH) group and sham operation(SO) group.Results Fifty genes were found to be related with liver regeneration.The initial and total expressing gene numbers occurring in the initiation phase of liver regeneration(0.5-4 hours after PH),G_0/G_1 transition(4-6 hours after PH),cell proliferation(6-66 hours after PH),cell differentiation and structure-function reconstruction(72-168 hours after PH) were 24,10,21,2 and 24,23,46,26 respectively,indicating that the related genes were mainly triggered during the initiation phase,and worked at different phases.The total frequencies of their up-and down-regulation expression were 153 and 123 respectively,demonstrating that the expression of the major genes increased,and the minority decreased.Their expression profiles were classified into 6 types,indicating that the activities mentioned above were diverse and complicated during liver regeneration.Conclusion The growth and differentiation of liver stem cells are enhanced during liver regeneration.

Objective To know the indoor air pollution status in the newly decorated residential houses in Jiaozuo and to study the effect of decoration materials on the pollution. Methods To monitor formaldehyde, ammonia and benzene levels in the indoor air of 39 newly decorated rooms in Jiaozuo. Results The exceed standard rates of formaldehyde, ammonia and benzene in the indoor air were 73.6%, 84.7% and 25.8% respectively. Exceed standard rate of formaldehyde in the room which held the new furniture was the highest, 88.8%. Conclusion Decoration may cause indoor air pollution, the most part of the pollutants are formaldehyde and benzene. The level of the pollution depends on the different usages of the rooms.

Objective To investigate the cause and treatment for ischemic ophthalmopathy after cataract phacoemulsification.Methods A total of 3000 patients with cataract underwent phacoemulsification were retrospectively analyzed,and 13 patients with ischemic ophthalmopathy.The ischemic optic neuropathy (ION) were in 8 cases,7 cases occurred in age related cataract,1 cases occurred in the dislocation of lens;The central retinal artery occlusion (CRAO) were occurred in 5 cases,1 cases of age-related cataract,2 cases of congenital cataract,2 cases of traumatic cataract.The patients were diagnosed with fundus,visual field and fundus fluorescein angiography respectively,and then were treated with dilation of blood vessels,nutrition nerves and symptomatic treatment.Results The visual acuity in 6 cases with ION after the treatment were improved in different degrees;The visual acuity in 2 cases with CRAO after treatment were improved,3 cases was not recovered.Conclusion Ischemic ophthalmopathy caused by phacoemulsification cataract surgery may be related to the main vascular disease or optic nerve ischemia and hypoxia during operation,and with early detection and treatment,visual acuity can be improved to some extent.

Objective To study the effect of laparoscopic neoplasty and changes of procalcitonin (PCT) and cell-mediated immunity in elderly patients with duodenal ulcer perforation. Methods Forty-four elderly patients with duodenal ulcer perforation were divided into laparoscopic neoplasty group (n=20) and open neoplasty group (n=24).The level of PCT was assayed by colloid immunization. Blood levels of CD3+, CD4+, CD8+and natural killer (NK) cells were detected by flow cytometry before operation and at 0.5 h, 24 h, 48 h and the 7th day after operation.Surgical complications and postoperative hospital stay were observed in two groups. Results There was no significant difference in the activity of PCT before operation between two groups. There were no significant differences in CD3+, CD4+, CD8+ and NK cells 0.5 h before operation between two groups. The level of PCT was significantly lower at 24 h and 48 h after operation in laparoscopic group than that in open operation group (P<0.05). There were significant differences in the serum levels of CD3+, CD4+, CD8+and NK cells with time changes in two groups (P<0.05). There were significant decreases in CD3+, CD4+and CD8+at 24 h after operation than those before operation in two groups, which were significantly lower in open operation group than those of laparoscopic group except for CD8+. The levels of CD3+, CD4+and CD8+recovered to the levels before operation at 48 h after operation in laparoscopic group. In open operation group CD3+did not return to the level before operation at 7 d after operation. The levels of NK cells were decreased at 24 h after operation in two groups, but there was no significant difference in the level of NK cells between two groups. The level of NK cells returned to preoperative levels at 48 h after operation in laparoscopic group, while there was no significant difference in the level of NK cells before and after operation in open neoplasty group. Compared with the open neoplasty group, there were fewer complications and shorter hospital stay in laparoscopic group. Conclusion The laparoscopic repair operation for gastric and duodenal ulcer perforation has a fewer effects on the stress response and immune function in elderly patients, and has the advantages in the protection of immune function.

Objective To investigate the effects of Lipo-PGE1 on the expression of T-bet and Gata-3,and its potential mechanisms causing the shift of T cells from Th1 to Th2 on Acute lung injury(ALI)induced by Lipopolysaccharide(LPS)in mice.Methods Sixty male BALB-C mice were randomly divided into three groups(n =20 in each group):(1)control group,mice were treated with intravenous injection of NS in dose of 10 ml/kg,(2)LPS group,mice were exposed to LPS with dosage of 5 mg/kg(0.5 g/ml diluted in saline),and(3)LPS + PGE1 group,mice were treated with Lipo-PGE1 in dose of 15μg/kg.Sixhours after injection,the lungs were removed for observing the histopathological changes and determination of wet/dry lung weight(W/D)ratio.The levels of Th1 and Th2 were determined by flow cytometry,and the expressions of T-bet and Gata-3 mRNA were detected by using RT-PCR.One-way ANOVA was used for comparing differences between groups,and all data were presented in((x)± s).Results The histological changes of lung injury were lessened by PGEC ompared with the W/D ratio(5.74 ± 0.31)in LPS group,the one(4.92 ±0.27)in LPS +PGE1 group was lower significantly(P ＜0.01).The levels of Th1 and Th2 and their ratio Were higher in LPS +PGE1 group[(20.31 ±2.20)％,(10.50±0.80)％,(1.93±0.05)]than in LPS group[(16.65 ±1.70)％,(9.40 ±1.25)％,(1.73 ±0.03)](P＜0.01).Compared with control group,the expressions ofT-bet mRNA(1.183 ±0.495),and Gata-3 mRNA(0.693±0.285),and their ratio(1.713 ± 0.131)were lower(P ＜0.01); compared with LPS group,PGE1 significantly increased the expressions of T-bet mRNA(1.827 ± 0.705)and the ratio of T-bet/Gata-3 (2.502 ±0.352)(P ＜0.01),while didn(t)increased the expressions of Gata-3 mRNA(0.7191 ±0.186)significantly(P ＞ 0.05).Conclusions Lipo-PGE1 may up-regulate transcription factor T-bet which participates in the Th1 differentiation ratio,and then improve the inflammatorv svmntom.

Objective Mongolian gerbil can make themself urine concentration for saving water and adapt to the harsh desert environment, due to their very unique moisture control system in the body.Methods Mongolian gerbil is resistant to drought on account of their special kidney. Histology of the kidney, ureter and bladder in Meriones Unguiculataus were observed by light microscopy using HE staining.Results The results showed that compared with rats and mice, the Mongolian gerbils have more developed distal tubules, and well developed inner renal medulla.Conclusions We hope that the findings of this study enrich our understanding of the histology of urinary system in Mongolian gerbils and provide support for the laboratory animalization of this animal.

AIM: To study the electrophysiological effects of nitric oxide (NO) on the pacemaker cells in guinea-pig left ventricular outflow tract under the condition of ischemia/reperfusion ( I/R) .METHODS:The spontaneous slow action potentials of guinea-pig left ventricular outflow tract were recorded by conventional intracellular microelectrode technique.The effects of NO donor sodium nitroprusside ( SNP) on the spontaneous slow action potentials under normal or I/R condition were investigated.RESULTS:SNP at concentrations of 1, 10 and 100μmol/L but not 1000μmol/L signif-icantly increased velocity of diastolic depolarization ( VDD) and rate of pacemaker firing ( RPF) , SNP at concentrations of 1, 10, 100 and 1 000μmol/L notably increased maximal diastolic potential (MDP), amplitude of action potential (APA) and maximal rate of depolarization ( Vmax ) , shortened 50%and 90%of the duration ( APD50 and APD90 ) .In ischemia 10 min group, VDD and RPF were significantly decreased, APA and Vmax were notably increased, and APD50 and APD90 were markedly lengthened compared with control group.In reperfusion 10 min group, VDD and RPF were significantly in-creased, MDP and APA were notably decreased, and APD50 and APD90 were markedly shortened compared with I 10 min group.In reperfusin 10 min group, the pacemaker activity was always irregular.In reperfusion 10 min group, the parame-ters of spontaneous slow action potentials restored to the levels of control group except for VDD and Vmax .In 1, 10 and 100 μmol/L SNP+R groups, VDD and RPF were significantly increased than in ischemia 10 min group .In 1, 10, 100 and 1 000 μmol/L SNP+R groups, APA, APD50 and APD90 were restored to the levels of control group.CONCLUSION:SNP significantly increases the spontaneous activity of left ventricular outflow tract, and relieves the effects of I/R on the sponta-neous slow action potential markedly.

Objective To study the hemodynamic changes of rabbit VX2 liver tumors before and after ethanol injection by perfusion imaging of MSCT and investigate the correlation between perfusion parameters and microvessel density (MVD). Methods All of 15 Japanese long-ear white rabbits were divided into control group and experiment group. All rabbits were inoculated with VX2 liver tumor. Perfusion imaging of MSCT scans were conducted in 5 rabbits in the control group on the 14 th day after VX2 tumor inoculation, and the borders of the tumors were stained with immunohistochemical stains, and MVD was measured by anti-CD34. Perfusion imaging of MSCT scans were conducted in all 10 rabbits in the experiment group on the 14 th day after VX2 tumor inoculation. Then absolute alcohol was injected into the tumors by laparotomy. CT scans were conducted 3 and 30 days after absolute alcohol injection, and the borders of the tumors were stained immunohistochemically, and MVD was measured by anti-CD34. The differences of perfusion parameters such as hepatic blood ( BF), hepatic blood volume (BV), mean transit time ( MTT),permeability of capillary vessel surface (PS), and hepatic arterial fraction (HAF), hepatic arterial perfusion (HAP) were compared to evaluate the liver hemodynamic changes. Statistical repeated measurement t test, correlation analysis were performed. Results BF of border of the tumor between pretreatment, 3 days after ethanol injection and 30 days after ethanol injection were ( 280. 62 ± 59. 87 ),(322.03 ± 86. 94 ), ( 177.05 ± 75.96) ml · min -1; HAF were 0. 59 ± 0. 08, 0. 89 ± 0. 12, 0. 23 ± 0. 07;HAP were ( 189. 26 ± 25.46), ( 251.57 ± 31.78 ), (40. 90 ± 5.17 ) ml · min - 1 · ml - 1. HAP increased significantly after ethanol injection 3 days ( P ＜ 0. 05 ); BF, HAF, HAP decreased significantly 30 days after ethanol injection compared with 3 days after ethanol injection ( P ＜ 0. 05 ); BF, HAF, HAP decreased significantly 30 days after ethanol injection compared with pre-treatment ( P ＜ 0. 05 ). It showed positive correlation between BF, PS, HAF, HAP and MVD (r=0. 916, 0. 726, 0. 870, 0. 889; P ＜0. 05). MVD decreased significantly compared with the control group (43.9 ± 4. 0)/HP 30 days after ethanol injection (21.8±3.5)/HP (t = 12.271, P ＜0.05). Conclusion Perfusion imaging of MSCT can detect the hemodynamic changes in rabbit VX2 liver tumors, and also in tumors before and after ethanol injection. CT perfusion can take the place of MVD to evaluate the tumor angiogenesis.

0.05).The ADCs of low-grade(gradeⅠ～Ⅱ) astrocytomas were significantly higher(P

Objective:To study the expression and physiological significance of water channel proteins in human T lymphocytes.Methods:AQP0-9 mRNA and protein in inactivated and activated human T lymphocytes were analyzed using reverse transcriptase-polymerase chain reaction (RT-PCR) analysis and Western blot.Results:No AQP was expressed in inactivated lymphocytes.However,AQP3 mRNA and protein were expressed in PHA activated T lymphocytes.Conclusion:Water and glycerol transport mediated by AQP3 may be important in T lymphocyte activation.