Objective: To investigate the anti-inflammatory effects of quinolinic acid.Methods: Kunming mouse or Wistar rat was selected to proceed experiments.Influences of quinolinic acid on tumidness caused by dimethylbenzene in mouse's ear,on wandering of rat WBC caused by CMC injection,on increasement of mouse capillary vessel permeability caused by acetic acid,on granuloma in rat's armpit caused by tampon and phagocytosis of mouse were investigated,respectively.Results: Obvious suppression of all the inflammatory models was observed.Conclusion:Exogenous quinolinic acid is endowed with quite evident anti-inflammatory effects on either acute or subacute animal models with somewhat immunological inhibition.

Adult ; Choroid Plexus Neoplasms ; pathology ; Diagnosis, Differential ; Ear Neoplasms ; pathology ; radiotherapy ; surgery ; Endolymphatic Sac ; pathology ; Glomus Jugulare Tumor ; pathology ; Humans ; Immunohistochemistry ; Magnetic Resonance Imaging ; Male ; Meningioma ; pathology ; Skull Neoplasms ; pathology ; radiotherapy ; surgery ; Temporal Bone ; pathology ; Tomography, X-Ray Computed

To study the relationship between endog-enous digitalis-like substance (EDLS) and ch-ronic renal insuffieiency(CRI), using radioimmu-noassay (RIA)with digoxin kit, we measured serum level of EDLS in patients with CRI, patients on hemodialysis (HD) and renal tra-nsplant patients. The results suggest that serum level of EDLS is closely related with renal function. When renal function goes down, the level of EDLS increases. This suggest that EDLS may be involved in pathogensis of CRI. HD can decrease serum level of EDLS. When the graft is functioning, the serum level of EDLS is similar to that in haalthy controls. The cor-relation between ELLS and renal hypertension is not clear.

BACKGROUND: Caspase-3 exists in normal cell in form of zymogen and is capable of stimulating cell apoptosis after activated by apoptosis inducing factors.OBJECTIVE: To observe the activity of caspase-3 in hippocampal cytosolic S-100 and neuronal apoptosis in hippocampal regions, so as to discuss the relationship between hippocampal neuronal apoptosis and caspase3 activity during the whole brain ishcemic-reperfuasional injury.DESIGN: Randomized controlled experiment.SETTING: Emergency Department of Southwest Hospital Affiliated to the Third Military Medical University of Chinese PLA.MATERIALS: This experiment was carried out at Southwest Hospital Affiliated to the Third Military Medical University of Chinese PLA from January to April 1999. Totally 182 male Wistar rats were randomly divided into 3 groups: namely sham operation group of 14 rats, cerebral IR group of 84, rats acetyl-asp-glu-val-asp-aldehyde (AC-DEVD-CHO) treatment group of 84 rats, rats in the latter two groups were then subdivided into IR 8, 24, 48, 72, 120 and 168 hours time points subgroups with 14 rats in each.METHODS: The whole brain ischemia 20 minutes and reperfusional model was established on rats in brain IR group and Ac-DEVD-CHO treatment group, and rats were executed separately at post-reperfusional 8, 24,48, 72, 120 and 168 hours for obtaining hippocampal specimen; rats in sham operation group were only underwent anesthesia and operation without common carotid arterial occlusion and burns of vertebral artery, they were executed at 72 hours after operation and hippocampal specimen was obtained. The quantity of amino-methylcoumarin that was produced from the same mass of specimen within same decomposition time was used to reflect the activity of caspase-3. Brain slices that were obtained from different time points were stained and embedded for observing the hippocampal cell apoptosis under fluorescence microscope at 330-350 nm.MAIN OUTCOME MEASURS: ① The caspase-3 activity in hippocampal S-100 in different post-IR time point groups. ② The hippocampal cell apoptosis in different post-IR time point groups. ③ relationship between caspase-3 activity and neuronal apoptosis in hippocampal regions.RESULTS: Totally 182 rats were enrolled in this experiment, 14 rats got lost, thereby date of 168 rats was entered the result analysis. ① The changes of caspase-3 activity in hippocampal S-100 in different post-IR time point groups: There was no change in sham operation group at postoperative 72 hours. In contrast with cerebral IR group, there were obvious reduction in Ac-DEVD-CHO treatment group at post-reperfusional 24, 48,72, 120 and 168 hours [(1.71±0.03, 1.22±0.03; 2.77±0.09, 1.59±0.7;5.54±0.51, 2.3±0.19, 6.28±1.71, 3.43±0.46; 3.11±1.21, 1.73±0.14) nkat/kg;P ＜ 0.05 or 0.01]. ② The hippocampal cell apoptosis in different post-IR time point groups: Under 400× field of vision, the number of apoptotic cells in sham operation group was 1.2±0.4 cells at postoperative 72 hours.It was lower in Ac-DEVD-CHO treatment group at post-reperfusional 24,48, 72, 120 and 168 hours than cerebral IR group [(6.4±1.7, 2.8±0.8;11.8±1.3, 5.8±1.9; 19.8±3.1, 10.0±1.9; 31.2±5.9, 16.4±2.4; 19.8±2.3, 9.0±2.3)cells/400× field of vision; P ＜ 0.01]. ③ Relationship between caspase-3activity and neuronal apoptosis in hippocampal regions: It was proved of linear correlation in cerebral IR group and Ac-DEVD-CHO treatment group,displaying significantly positive correlation r= 0.935 6 or 0.980 0, P ＜ 0.01).CONCLUSION: Caspase-3 activation is one of the major inducer for hippocampal neuronal apoptosis, playing important role in hippocampus neuronal apoptosis in rats during IR injury.

Objective To explore the basic medical mechanism of XinBao pill on electrophysiological characteristics of hyperpolarization-activated cyclic nucleotide-gated channel 4 (HCN4), and illustrate the mechanism of its therapeutical effect on bradycardia.Methods Human HCN4 mRNA was injected into the Xenopus laevis oocytes, after incubated for 2 ~3 days, channel current properties of HCN4 perfused with 40 mg/L XinBao Pill were observed by double electrode voltage clamp technique.Results At-90mV test potential, compared with control group (no XinBao pill), HCN4 channel peak current and tail current in 40 mg/L XinBao pill group had obvious changes, and V1/2 from ( -103.61 ±3.57)mV to ( -106.42 ±5.33)mV in XinBao pill group, from( -81.11 ±4.26)mV to( -86.36 ±7.44)mV in control group.The values of k from (15.15 ±2.23)mV to (17.33 ±3.58) mV in XinBao pill group, from(11.78 ±0.85)mV to(12.39 ±1.51)mV in control group(n=10).At test potential -90 mV, 40 mg/L XinBao pill perfusion fluid decreased the instantaneous current of(0.15 ±0.24)%, the EC50 was (30.8 ±4.8)mg/L (n=8).At test potential-140 mV~-100 mV level, 40 mg/L XinBao pill group increased the channel activation time constant compared with control group[(226.73 ±31.36)ms vs(143.67 ± 21.44)ms;-140 mV,n=10,P<0.05].40 mg/L XinBao pill group increased the channel deactivation time constant compared with control group [(1293.53 ±95.02)ms vs (647.12 ±61.35)ms;-140 mV,n=10,P<0.05].Conclusion The XinBao pill enhances the instantaneous current of HCN4 in a concentration-dependent manner, and extents channel activation and deactivation processes.

Objective:To evaluate the clinical safety and effectiveness of heavy specific gravity levobupivacaine in spinal block.Method:30 selective general surgical patients of ASAⅠ～Ⅱin obstetrics and gynecology were randomly di- vided into levobupivacaine group(L group)and bupivacaine group(B group).After opening the venous channel and transfusing equilibrium liquid 30 mins,the T 4-5 space was selected as the puncture site for the epidural puncture.The 2 medicaments were injected in the rate of 0.1 ml/s respectively.Then the anesthetizing onset time,maintenance time,time of motion blockade and restoration,effect of anesthesia,variations of blood pressure and heart rate and adverse drug reac- tion were observed.Result:The onset time was 82.61?22.10 s in L group and 59.30?21.50s in B group,respectively. The variations of SBP,DBP and HR in L group were less than those in B group.There was no significant difference in the 2 groups in maintenance time,time of motion blockade and restoration and effect of anesthesia.Conclusion:Compared with bupivacaine,heavy specific gravity levobupivacaine can make the same anesthesia effect with a steadier blood circulation. The specific gravity levobupivacaine is a safe and feasible drug for spinal anesthesia.

Objective To investigate the roles of Caspase 3 in neuron apoptosis following cerebral ischemia/reperfusion in the rat hippocampus. Methods A model of rats with global ischemia induced by occlusion of the four vessels according to the method by Pulsinelli et al was used in this study. A total of 182 Wistar rats [(220?20) g] were divided randomly into three groups: control group ( n =14), cerebral ischemia group ( n =84), and cerebral ischemia group treated with acetyl asp glu val asp aldehyde (Ac DEVD CHO, n =84). Time points for observation included 8, 24, 48, 72, 120, and 168 h in the latter two groups. Caspase 3 activity in cytosolic extracts (S 100) of hippocampus and apoptotic neurons in hippocampus following cerebral ischemia/reperfusion were observed at the above mentioned time points, respectively. Results (1) No caspase 3 activity was detected in S 100 from the control group. In S 100 from the ischemia group, weak caspase 3 activity was detected at 8 h, but it increased gradually and peaked at 120 h, and then decreased apparently at 168 h after reperfusion. After treatment with Ac DEVD CHO following cerebral ischemia/ reperfusion, caspase 3 activity was inhibited to some extent at each time point. (2) Apoptotic cells were occasionally observed in hippocampus in the control group, but the apoptotic cells increased apparently at 24 h, peaked at 120 h, and decreased a few at 168 h after reperfusion in ischemia group. After treatment with Ac DEVD CHO following cerebral ischemia/reperfusion, apoptosis decreased to some extent at each time point (except 8 h following cerebral ischemia/ reperfusion). (3) Caspase 3 activity in S 100 from hippocampus was positively correlated with apoptotic neurons in hippocampus following cerebral ischemia/reperfusion at each time point ( r =0.9356 in ischemia group, r =0.980 0 in treatment group). Conclusion Caspase 3 may be one of the key causes resulting in neuron apoptosis in rat hippocampus after cerebral ischemia/reperfusion. It may play an important role in ischemia reperfusion brain injury.

[Objective] To explore effect of momordin on reversion of multidrug resistance(MDR) in K562/A02 cells,and expression and function of P-glycoprotein(P-gp).[Methods] IC50 was detected by CCK-8,and expression of P-gp and retention of ADM in K562/A02 cells were detected by flow cytometry(FCM).[Results] Momordin can improve sensitivity of K562/A02 cells to many kinds of chemotherapeutical drugs,result in decrease of expression of P-gp,and raise concentration of ADM within cells.[Conclusion] Momordin can partly reverse drug resistance of K562/A02 cells,the mechanism of reversion is related with down regulation of expression of P-gp.

Objective To establish animal models of diffuse axonal injury (DAI) and discuss the early functional MRI findings.Methods Twenty-five adult white rabbits were divided into control group (n =5),mild DAI group and severe DAI group (n =6) according to random number.Mild DAI group was subdivided into mild DAI 3 h (n =6),1 day (n =4) and 1 week (n =4) groups.Routine MRI and diffusion tensor imaging (DTI) were performed.Parameters measured were fractional anisotropy (FA),apparent diffusion coefficient (ADC),axial diffusivity (AD) and radical diffusivity (RD).Results Significantly increased FA (P＜0.01) and decreased ADC (P＜0.05) and RD (P＜0.01) were detected in severe DAI group compared to control group,but there was no significant variation in AD between the two groups (P ＞ 0.05).Each parameter remained almost unchanged in mild DAI 3 h group and mild DAI 1 week group,but FA was increased (P ＜ 0.01) and RD decreased (P ＜ 0.05) in mild DAI 1 day group,with no changes of ADC and AD.Conclusion DTI is a sensitive way to detect the occurrence and development of DAI and can provide referential images for early DAI diagnosis.

Objective To discuss the clinical manifestations and imaging diagnostic value of tuberous sclerosis accompanied by multi-organ injuries.Methods 2 cases in our hospital and 27 cases of tuberous sclerosis from the published reports were collected.The clinical manifestations and imaging features as well as the extent and type of multi-organ lesion were analyzed.Results Among the 29 patients,17 were male and 12 were female.The averaged age was 16.8.The clinical manifestations included:with family history in 6 , epilepsies in 25 (15 with mental retardation),symmetric angiofibroma in the face in 22 (3 with similar changes in the else body surface),fibromas beneath toenail or fingernail in 4, hyperdactylia of thumb in 2 and abdominal masses in 7 (4 with hematuria), tuberous scleroses beneath ependymal layer in 27,17 patients with kidney diseases,9 involved liver,5 involved spleen.Conclusion Multiple organs can be involved by tuberous sclerosis.The calcification of ependymal lyer and harmatoma of kidney are the most valuable in imaging diagnosis of the disease.