Objective To investigate protective effects of the hydrogen saturated saline on acute lung injury and pulmonary fibrosis in rats with paraquat (PQ) poisoning. Method Forty-eight Sprague-Dawley rats were randomly divided into 3 groups, namely control group, PQ poisoning group and intervention group (n = 16 rats in each group) . Animals in PQ poisoning group and intervention group were fed with PQ in dosage of 50 mg / kg. Rats of control group were fed equivalent amount of distilled water instead. One hour after administration of PQ, rats of intervention group were treated with 5 ml / kg hydrogen saturated saline injected intra-peritoneally twice a day until the rats were sacrificed. The rats of poisoning group and control group were treated with intra-peritoneal injection of equivalent amount of normal saline. Arterial partial pressure of oxygen ( PaO2 ), 8-hydroxy-2' -desoxyguanosine (8-OHDG) and transforming growth factor β1 (TGF-β1) of lung tissue were measured on the 3rd and 21st day after PQ administration. Quantitative data was expressed as mean ±standard deviation (x-±s) . SPSS version 12. 0 package was applied for variance analysis and SNK-q test, and statistical differences were considered significant when P ＜ 0. 05. Results ① PaO2 decreased significantly in poisoning group (9. 34 ± 0. 47 kPa) and intervention group (10. 30±0.62 kPa) compared with control group (11.87 +/- 0.42 kPa) on the 3d (P ＜0.01), and as intervention group was compared with poisoning group, there was a significant difference ( P ＜ 0. 05 ) . On the 21st day, PaO2 was still lower in poisoning group (8. 36 ±0. 51 kPa) and intervention group ( 10. 14 ±0. 27 kPa) than that in control group ( 11.87 +0. 24 kPa) (P ＜0. 01 and P ＜0. 05, respectively), and as intervention group was compared with poisoning group, there was a significant difference ( P ＜ 0. 01 ) . ②The levels of 8-OHDG in lung tissue increased significantly in poisoning group (23.58±7. 18 ng/ml ) and intervention group (9. 49± 2. 45 ng/ml) on the 3rd day after PQ administration compared with control group (7.71 + 1.96 ng/ml) (P＜0. 01 and P＜0. 05, respectively), and as intervention group was compared with poisoning group there was a significant difference ( p ＜0. 01 ) . There were no significant differences in 8-OHDG level found among the groups on the 21st day after PQ administration (P ＞ 0. 05 ) . ③ The level of TGF-β1 (measured by mean optic density, MOD) in lung tissue of rats in poisoning group ( 10. 11±2.49 MOD) and intervention group (8. 14 + 1.58 MOD) exhibited in higher levels than control group (5.93 + 1. 98 MOD) on the 3rd and (5.97 + 2. 35 MOD) on the 21st day after PQ administration (P ＜0. 01 and P ＜0. 05, respectively), and however, a lower level of TGF-β1 was observed in intervention group on 3d and 21d compared with poisoning group (P ＜0. 05 and P ＜0. 01, respectively) . Conclusions Hydrogen saturated saline can alleviate oxidative stress, mitigate oxidative damage and inhibit pulmonary fibrosis of lung induced by PQ intoxication.

Objective To investigate the effects of 4 °C hypertonic saline (HTS) on S100 protein in serum and brain tissues of rats after cardiac arrest (SCA). Method Thirty SD male rats were randomly divided into shame-operated group (A), NS group (B) ,4℃ NS group (C), HTS group (D) and 4℃. HTS group (E), in e-qual number ( n = 6). Drugs were given to the rats of all groups at the initiation of CPR except group A. The rat model of CA was induced by asphyxia. Over 24 hours after restoration of spontanous circulation ( ROSC), venous blood sample was drawn to detcect the concentration of serum S100 protein in each group, and the rats were sacrificed and their brain tissues were taken for comparing the expressions of S100 protein in hippocampus. One-way analysis of variance and q -test were used for comparison among groups. P < 0.05 was considered significant. Results Compared with group A, the concentration of serum S100 protein in other groups were much higher ( P < 0.01). Compared with group B,the concentrations of serum S100 protein in groups C, D and E were also much lower ( P < 0.01). Compared with groups D and E, the concentration of serum S100 protein in group C was much higher ( P < 0.01). Compared with group D, the concentration of serum S100 protein in group D was higher ( P < 0.05). Compared with group A, the expressions of S100 protein in rats brain tissues of groups B,C and D were much higher ( P < 0.01). The expression of S100 protein in brain tissue of rats in group E was also higher than that in rats of group A ( P < 0.05). Compared with group B, the expressions of S100 protein in brain tissues of rats in groups C,D and E were lower (P < 0.05 and P < 0.01). Compared with group C, the expressions of S100 protein in brain tissues of rats in groups D and E were lower (P < 0.01). Compared with group D, the expression of S100 protein in brain tissue of rats in group E was lower (P < 0.05). Conclusions After CA the 4℃ HTS can decrease serum S100 protein level and inhibit the expression of S100 protein in hippocampus, then protecting the brain tissue.

BACKGROUND: Antinuclear antibody, anticentromere antibody, anti-cytoplasm antibody, and antibody against SCL-70 are the main self-antibodies involved in systemic scleroderma (SSc) and are closely connected with the development of SSc.OBJECTIVE: To probe the value of various self-antibodies and proteins in evaluating the functional prognosis of patients with SSc. DESIGN: Case-control study.SETTING: Clinical Laboratory of Second Hospital Affiliated to Jiangxi Medical College.PARTICIPANTS: Totally 74 patients, 19 males and 55 females aged 12-59years old, were confirmed of SSc at the outpatient and inpatient departments of Second Hospital Affiliated to Jiangxi Medical College between December 1995 and December 2004. There were 46 cases of diffuse cutaneous SSc, 24 cases of localized cutaneous SSc, and 4 cases of overlapping syndrome. Meanwhile40 inpatients (14 males and 26 females aged 19-54years old) who received treatment due to other diseases were recruited from the same hospital.METHODS: The level of antinuclear antibody, anticentromere antibody,and anti-cytoplasm antibody was detected with indirect irnmuneofluorescence assay; antibody against SCL-70 was detected with Western blot; the level of serum immunoglobulin, C-reactive protein (CRP) and rheumatoid factor was examined with velocity dispersion turbidimetry.ticentromere antibody, anti-cytoplasm antibody, and antibody against SCL-70;RESULTS: Blood samples collected from the 74 patients with SSc and 40controls were proved eligible and all data entered the final statistical analanti-cytoplasm antibody, and antibody against SCL-70: It was obviously higher in SSc group than in control group [66% (49/74), 53% (39/74), 39%(29/74), 7% (5/74), 0, (x2=57.15, P ＜ 0.01)]. The positive rate of antinuclear antibody in patients with diffuse cutaneous SSc was significantly lower than in patients with localized cutaneous SSc [57% (26/46), 83%(20/24),(x2=5.03, P ＜ 0.05)], but the positive rate of antibody against SCL70 was significantly higher than localized cutaneous SSc [48% (22/46),rheumatoid factor in patients with SSc was markedly higher thanin control group [(16.89±11.94), (11.89±2.05) g/L; (23.06±6.18), (22.44±5.53) IU/mL,t=8.01, 2.46, P ＜ 0.01].CONCLUSION: The positive rate of antinuclear antibody, anticentromere antibody, anti-cytoplasm antibody, and antibody against SCL-70, as well as the level of immunoglobulin G and rheumatoid factor were obviously increased in patients with SSc, suggesting that these experimental parameters have the value in evaluating the prognosis of SSc.

Aim Tostudythetherapeuticeffectof CJ016 on human lung cancer model and the mecha-nism.Methods Anexperimentalhumanlungadeno-carcinoma model of A549 was set up to investigate the anti-tumor effect of CJ016,while the effect of angio-genesis and apoptosis in tumor were detected.Results In vitro,the cell proliferation was inhibited signifi-cantly by CJ016,and the value of IC50 was 34. 22 nmol ·L-1 .In vivo,the tumor inhibition rate and T/C%value were 70. 08%and 27. 75%,respectively,at the dose of 20 mg·kg-1 .Meanwhile,CJ016 could reduce the expression of CD31 and promote the apoptosis of tumorcells.Conclusion CJ016caninhibitthegrowth of A549 cells,and the possible mechanism may be re-lated to the reduction of angiogenesis and inducing tumor cell apoptosis.

Objective To compare bolus infusion and replenishment using real low mechanical index contrast enhanced ultrasound in assessing the change of renal cortical perfusion.Methods Using dopamine (i.v.) at the dose of 0.5,2.0,5.0μg · kg- 1 · min- 1 to change renal blood perfusion of 20 rabbits,then during bolus or contant injection of SonoVue,at coded pulse inversion mode,real-time contrast ultrasound was performed,the latter method needed destroying microbubble at a high MI when amplitude reach a steady state,then recording the replenishment,peak intensity(A) and time to peak (PPT) were obtained through raw time-intensity curve,and slope rate of TIC(k) was acquired by curve fitting,standard effective renal plasma flow(ERPF) was measured through 4-aminohippuric acid clearancerate method,meanwhile correlations between ERPF and parameters were analyzed,as well as the paired samples t test for each parameter before and after dopamine administration.Results The ascending branchs of raw TIC of bolus infusion increased sharply and were approximately straight,then descended gradually,while that of replenishment looked like two straightlines with different slopes,then stayed horizontal Both the value of A of two methods were positively correlated with ERPF ( r b =0.85,r re =0.66),and were different at the same ERPF,meanwhile the value of TTP were negatively correlated with ERPF( r b =-0.92,r re =- 0.76),and there were no statistically difference between the two methods.k from Gamma fitting was far from correct,while k from exponential fitting was apparently correlated with ERPF ( r re =0.77 ).Conclusions Both bolus injection and constant injection-replenishment method can assess renal cortical blood perfusion,TIC parameters A and TTP represent regional blood volume fraction and microbubble velocity respectively.Bolus-infusion with real low mechanical index is more precise and available.Comparing with k,TTP is more appropriate to reflect perfusion velocity.

Objective To investigate the effects of transplantated tumor capillary permeability under microbubble enhanced diagnostic ultrasound exposure.Methods Fourty eight rats were randomly divided into four groups after Walker 256 carcinomas were subcutaneousely implanted,named the control group (A),microbubbles group (B),ultrasound group (C),microbubbles and ultrasound group (D).Using Evans blue(EB) as the indicator for tumor capillary permeability,the microbubbles were injected through the vein with diagnostic ultrasound frequency as 1.75 MHz,mechanical index as 1.4.The spillover of EB was estimated under confocal laser microscope,meanwhile the contents of EB in the tumor tissues were calculated according to the standard curve and spectrophotometry.Results EB spillover was observed around the capillaries in the group D,while EB spillover was only observable on capillary in group A,B and C.The EB content was also significantly higher than those in group A,B and C.Conclusions Exposure to both diagnostic ultrasound and microbubbles results in increased capillary permeability of rat tumor tissues,which might become a potential therapeutic method on clinical chemotherapy.

Objective To investigate the feasibility of transfecting gene into HepG2 by therapeutic ultrasound combined with microbubble,and to explore the optimal ultrasonic parameters for high transfection efficiency.Methods HepG2 cells were cross-interval planted in 24-well plates.EGFP plasmid DNA and microbubbles were added to the cultured HepG2 and three parameters of the therapeutic ultrasound were optimized.Firstly,set ultrasonic intensity gradient (group A,from A1 to A5),which were 0.4 W/cm,0.8 W/cm2,1.2 W/cm2,1.6 W/cm2 and 2.0 W/cm2 respectively.Secondly,set the duty cycle gradient group (group B,from B1 to B3),which were 10％,20％ and 50％ respectively.Lastly,set the exposure time group(group C,from C1 to C3),which were 30 s,90 s and 180 s.After 24 hours,the expression of GFP was observed by fluorescence microscopy,the transfection rates was detected by flow cytometry,the cell death were assessed by trypan blue exclusion.Results The plasmid transfection efficiency was varied under different ultrasonic parameters.Within a certain range,the increasing of parameters can improve the transfection efficiency,but when the parameters were too large (eg.the intensity＞1.6 W/cm2 or 50％ duty cycle),the actual transfection efficiency decreased due to the increased cell death.When the ultrasonic intensity was 1.2 W/cm2,the transfection efficiency and mortality were better than the other subgroups of group A.When the duty cycle was 20％,the transfection efficiency and mortality rate were better than the other subgroups of group B.Continue to increase the exposure time over 90 s was not statistically significant (P ＞0.05) for transfection efficiency and cell mortality.Conclusions The ultrasound-targeted microbubble destruction is an efficient method for gene delivery in vitro.The transfection efficiency vary greatly under different parameters,so optimization parameters is conducive to the promotion of gene transfection.

The CT findings in 200 cases of increased intracranial pressure without localizing signs were reported 132 out of the 200 cases (63.1%) were CT positive, among them there were 8 cases with brain metastatic cancer, 11 cerebral cysticercosis, 14 intracranial inflammatory lesions, 18 hydrocephalus with symmetrical ventricular enlargement, 66 mass lesions in the brain and 15 others. 77 out of the 209 cases (36.9%) were CT negative, among whom the diagnosis of the 61 cases coincided with that of BIH. It seems that our BIH cases were much different from those typical cases reported abroad, and the cause would be pending further investigation. It is to be noted that the following remarks, according to our study, would be associated with the positive findings in CT examination: 1. age, 60 years; 2. course of disease, within 6 months; 3. papilloedema and/or "soft" signs; and 4. local and severe abnomalities in EEG.

Objective To investigate the correlation between mRNA expression of VEGF,bFGF and dynamic contrast-enhancedT_1-weighted MRI together with conventional MRI features in pituitary adenomas.Methods Conventional MRI and gadolinium-enhanced dynamic Turbo-FLASH imaging was performed preoperatively in 30 patients with histologically verified pituitary adenoms.VEGF and bFGF mRNA expression were determined in pituitary adenomas by using comparative reverse transcription-polymerase chain reaction(RT-PCR) in all patients.The correlation between mRNA expression of VEGF/bFGF and dynamic contrast-enhanced and conventional MRI featureswere studied.Results Significant difference in VEGF and bFGF mRNA expression was found among pituitary adenomas according to different signal intensity-time curve(SI-TC) type(P

Objective To study the significance of antibody to double-stranded DNA (anti- dsDNA) in autoimmune hepatitis(AIH). Methods Anti-dsDNA were detected by immunological blotting. According to the anti-dsDNA, the patients were separated two groups: anti-dsDNA positive group and anti-dsDNA negative group. The clinical characteristics were compared between anti-dsDNA positive AIH group and negative group. Results Among the 43 serum samples, 13 (30.23%) eases with anti-dsDNA positive were found. The average level of AST(aspartate aminotransferase) and TBIL(total bilirubin) were (647.56 ±529.77) IU/L and (10.81± 8.08) rag/L, respectively, which was higher than that of the control group (P < 0.05). PTA (prothrombin activity) was 75.72%± 30.23 %, lower than that of the control group(P < 0.05). The liver cirrhosis rate in the anti-dsDNA positive AIH group was 61.5% (8/13), ,significantly higher than that of the control group. The time from the onset to liver cirrhosis was significantly shorter in an- ti-dsDNA positive AIH group than that of control group by the survival analysis and log rank test (P = 0. 0074). Conclusion AIH patients with anti-dsDNA positive generally associate with the serious liver damage, and prognosis is worse.