Objective:To compare the effects of Zn~(2+)onthe P2X receptor-mediated,ATP-induced currents in neurons separated from rat superior cervical ganglion(SCG),nodose ganglion(NG),and otic ganglion(OTG).Methods: Whole-cell patch clamp recording technique was used to study the regulatory effects of Zn~(2+) on ATP/??-me ATP-induced currents in the above 3 ganlglion neurons.Results: All SCG neurons responded to ATP with a sustained current,while no neurons responded to ??-me ATP;Zn~(2+) potentiated ATP-induced sustained currents to(1 442?34)% of the original value.All NG neurons responded to ATP and ??-me ATP with a similar sustained current;coapplication of Zn~(2+)(10 ?mol/L) potentiated their responses to(180?12)% and(262?28)%,respectively.All OTG neurons responded to both ATP and ??-me ATP with a sustained current.Coapplication of Zn~(2+)(10 ? mol/L) did not significantly potentiate the sustained currents induced by 10 ?mol/L ATP,but when ATP was at 30 ?mol/L,Zn~(2+)(10-100 ?mol/L) inhibited ATP-induced sustained currents in a dose dependent manner.If TNP-ATP(100 nmol/L) was first used to inhibit ATP-induced current to(26?2)% of the original value,Zn~(2+) at 10 ?mol/L potentiated the inhibited current to(127?9)% of its original value.Coapplication of Zn~(2+)(10 ?mol/L) potentiated ??-me ATP-induced currents to(146?5)% of the control.Zn~(2+)(300 ?mol/L) had no effect on ?_(on) and ?_(off) of ATP-and ??-me ATP-induced(30 ?mol/L) currents in OTG neurons.Conclusion:(1) Zn~(2+) is an allosteric modulator of P2X_(2) and P2X_(2/3) receptors in SCG and NG neurons and can potentiate the currents they induced.(2)The predominant receptor subtypes in OTG appear to be homomeric P2X_(2/3) and a little P2X_(2).Zn~(2+) has an inhibitory effect on the ATP-induced currents in OTG neurons,suggesting some novel members of the P2X purinoceptor exist in these neurons.

Objective: To compare the effects of Zn2+ on the P2X receptor-mediated, ATP-induced currents in neurons separated from rat superior cervical ganglion (SCG), nodose ganglion (NG), and otic ganglion (OTG). Methods: Whole-cell patch clamp recording technique was used to study the regulatory effects of Zn2+ on ATP/αβ-me ATP-induced currents in the above 3 ganlglion neurons. Results: All SCG neurons responded to ATP with a sustained current, while no neurons responded to αβ-me ATP; Zn2+ potentiated ATP-induced sustained currents to (1442±34)% of the original value. All NG neurons responded to ATP and αβ-me ATP with a similar sustained current; coapplication of Zn2+ (10 μmol/L) potentiated their responses to (180±12)% and (262±28)%, respectively. All OTG neurons responded to both ATP and αβ-me ATP with a sustained current. Coapplication of Zn2+ (10 μ mol/L) did not significantly potentiate the sustained currents induced by 10 μmol/L ATP, but when ATP was at 30 μmol/L, Zn2+ (10-100 μmol/L) inhibited ATP-induced sustained currents in a dose dependent manner. If TNP-ATP (100 nmol/L) was first used to inhibit ATP-induced current to (26±2)% of the original value, Zn2+ at 10 μmol/L potentiated the inhibited current to (127±9)% of its original value. Coapplication of Zn2+ (10 μmol/L) potentiated αβ-me ATP-induced currents to (146±5)% of the control. Zn2+ (300 μmol/L) had no effect on τon and τoff of ATP- and αβ-me ATP-induced (30 μmol/L) currents in OTG neurons. Conclusion: (1) Zn2+ is an allosteric modulator of P2X2 and P2X2/3 receptors in SCG and NG neurons and can potentiate the currents they induced. (2) The predominant receptor subtypes in OTG appear to be homomeric P2X2/3 and a little P2X2. Zn2+ has an inhibitory effect on the ATP-induced currents in OTG neurons, suggesting some novel members of the P2X purinoceptor exist in these neurons.

Adult ; China ; epidemiology ; Extraction and Processing Industry ; Female ; Humans ; Incidence ; Male ; Middle Aged ; Occupational Exposure ; Pneumoconiosis ; epidemiology ; Young Adult

Objective To investigate the relationship between the mutation of the exon 4 of leptin receptor gene(4Lys 109 Arg)and left ventricular function and renal hemodynamics in patients with hypertension.Methods From December 2005 to December 2006,digoxin marked primer enzyme coloration technique was used to detect the 4Lys 109 Arg polymorphism.The color Doppler echocardiography was used to detect the left ventricular function and the renal hemodynamics.The study covered 90 patients with hypertension (hypertension group)and 52 controls (control group).Results The frequencies of 4Lys109Arg in hypertension group and control group had no significant difference.The hypertension with GG genotype was significant difference in left ventrieular ejection fraction(LVEF),E/A,left ventrieular fractional shortening(LVFS),resistance index(BI),pulsatility index(PI)(P<0.05).The hypertension with GA genotype had significant difference in LVEF,E/A,LVFS(P<0.05).In hypertension group,LVEF,E/A,LVFS.RI and PI had significant difference between GG and AA genotype(P<0.05).In control goup,RI had significant difference between GG and AA genotype(0.65 ±0.02 vs 0.63±0.02,P<0.05).Conclusion The renal hemodynamics and the left ventricular function are associated with 4Lys109Arg polymorphism.

Objective To investigate the effects of valsartan on the expression of acyl-coenzyme A: cholesterol acyltransferase-1(ACAT-1) and peroxisome proliferator activated receptor-gamma(PPAR-?) in atherosclerotic plaques on rabbit aortic wall.Methods Twenty-four male Japanese white rabbits were randomly assigned into three groups(8 each): control group,valsartan group and high cholesterol feeding group.All rabbits were fed according to the experimental protocol for 12 weeks.Blood samples were taken from vein for measurement of serum lipids.The ratio of intima/media thickness of the aorta was measured.ACAT-1 mRNA/protein and PPAR-? mRNA/protein were determined by reverse transcription polymerase chain reaction(RT-PCR) and Western blotting,respectively.Results After 12 weeks,the levels of serum total cholesterol(TC),triglyeride(TG) and low density lipoprotein-cholesterol(LDL-C) in valsartan group and cholesterol group were significantly higher than those in control group(P0.05).The intima thickness and the ratio of intima/media in carotid arteries in cholesterol group were significantly higher than those in control group and valsartan group(P

The digitallization of field medical equipment for the modern troop is an important sign on military logistics modernization.The use of CR technology on the existing field X-ray equipment for digitallization upgrading can be combined with CR and PASC system,which is an effective channel on achieving digitalization of our military field X-ray image system.So the design plan of field CR and micro-PACS system combination is advanced.

Objective To discuss the establishment and application of PACS of our hospital, and its significance for the digitization of the radiology department. Methods PACS was adopted to store and transmission of images by CR, CT, MRI, DSA. The radiologist used PACS workstation to perform post-processing of the images. Results With PACS, filmless viewing, improved diagnosis quality, accelerated generation of diagnosis report could all be implemented. Conclusion With the application of PACS to digital and filmless imaging, the patient service by the hospital can be highly improved.

Serum CA19-9 is one of the markers most frequently detected in the diagnosis and biliopancreatic diseases.The levels of CA19-9 is important for the diagnosis,treatment and prognosis of biliopancreatic diseases.With the development of medical technology,the comprehension of the value of serum CA19-9 is more and more thoroughly.The benign and malignant diseases of biliopancreatic systems can be differentiated by the variation of the values of serum CA19-9,which has high sensitivity in malignant tumors.Serum CA19-9 is one of the independent indicators for evaluation of resectability of tumors and the survival time and life quality of the patients.In this article,the significance of serum CA19-9 in the diagnosis,treatment and prognosis evaluation for biliopancreatic diseases were reviewed.

Objective:To optimize the extraction process of Hegan Lidan granules. Methods:In order to choose the optimal tech-nological parameters, the content of baicalin was determined by HPLC. An orthogonal method was utilized with solvent volume, extrac-tion time and extraction times as the impacting factors and the content of baicalin and extraction rate as the indices. Results:The opti-mal parameters were as follows:using 8-fold water as the solvent, the raw material was extracted three times with 2 h for each. Con-clusion:The process is steady and feasible, and can be used in the extraction of Hegan Lidan granules.

Objective To analyze the relationship between the direct signs of invasive ductal carcinoma and the metastasis in the mammography.Methods 21 7 patients with invasive ductal carcinoma in the mammography were divided into four groups:mass with calcification group,mass without calcification group,calcification without mass group and the group without both mass and calcification. The correlation between metastasis and the size and shape of mass or calcification was studied.Results The rate of metastasis in the group with mass and calcification was 56.31%,and the percentage of the skin and nipple depressed in this group was 38.83%,both of whom were highest (P =0.004 and P =0.043)among four groups.The rate of metastasis in mass group was higher than that in the group without mass (46.27% vs 18.75%,P =0.033).Meanwhile,the edge burr and lobulation of the mass didn’t exert remarkable influence on the rate of metastasis (46.70% vs 25.00% and 43.37% vs 52.00%,P =0.389 and P =0.348).The probability of me-tastasis in the calcification group was higher than that in noncalcification group (53.57% vs 34.29%,P =0.001 ).However,in the calcification group,the different shapes of calcification did not result in significant difference in the rate of metastasis (51.19% vs 60.71%, P =0.382).In the 201 patients with breast cancer mass,the size of mass did not correlate with metastasis [(81.04±1 1 9.45)mm3 vs (70.06±208.30)mm3 ,P =0.654].The masses with lobulation were bigger than others [(7 6 .5 0 ± 1 7 4 .1 3 )mm 3 vs (8 .3 9 ± 1 0 .2 7 )mm 3 ,P =0.000],while the masses with edge burr were smaller than those with smooth edges [(52.10 ±85.90)mm3 vs (144.75±304.13)mm3 ,P =0.038].There was no significant correlation between the size of mass and the calcification [(80.39 ± 126.62)mm3 vs (69.63±209.12)mm3 ,P =0.660].However,the masses with point calcification were larger than those with both point and worm calcifications [(92.79±137.21)mm3 vs (41.71±94.58)mm3 ,P =0.041].Conclusion The mass and calcification in the mammography are valuable for judging the malignant degree of invasive ductal carcinoma.