1.Serum levels of chemoattractants high-sensitivity Creactive protein and neopterin with acute coronary syndrome and their clinical significance
Zhi CHENG ; Mingding TAN ; Dequan ZHANG
Chinese Journal of Primary Medicine and Pharmacy 2005;0(02):-
Objective To investigate the change of the inflammatory marker high-sensitivity C-reactive protein(HS-CRP) and the immune marker neopterin in patients with acute coronary syndrome(ACS).Methods The study population included 40 patients with acute myocardial infarction(AMI) and 40 patients with unstable angia pectons(UAP).At the same time,we selected 80 patients with chronic stable angia pectons.Serum levels of HS-CRP,neopterin were measured by means of ELISA.Results HS-CRP and neopterin were significantly higher in acute coronary syndrome group than those in chronic stable angina group.Conclusion HS-CRP and Neopterin are elevated in acute coronary syndrome.They can be used as the certain diagnosetic value for ACS.This study also supports the hypothesis that both immune and inflammation play roles in ACS.
2.Effects of esmolol combined with remifentanil on *MAC of isoflurane in patients undergoing upper-abdominal operation
Yanling ZHANG ; Yanping CHEN ; Dequan CAO
Chinese Journal of Anesthesiology 2008;28(8):701-703
Objective To investigate the effects of esmolol and remifentanil on minimum alveolar concentration (MAC) of isoflurane in patients undergoing upper abdominal surgery. Methods One hundred ASAⅠorⅡpatients aged 18-60 yr undergoing upper abdominal surgery under general anesthesia were randomly divided into 5 groups (n=20 each):group A isoflurane alone; group B isoflurane + large dose esmolol; group C isoflurane + remifentanil; group D isoflurane + remifentanil + small dose esmolol and group E isoflurane + remifentanil + large dose esmolol. In group B and E esmolol was infused at 250 μg·kg-1·min-1 after a loading dose of 1 mg/kg (large dose esmolol). In group D esmolol was infused at 50 μg'kg-1·min-1 after a loading dose of 0.5 mg/kg (small dose esmolol). In group C, D and E remifentanil was infused at 0.05 μg·kg-1·min-1 after a loading dose of 0.25 μg/kg. As soon as the patients lost consciousness, tracheal intubation was facilitated with succinyl choline 1.5 mg/kg. The patients were mechanically ventilated (VT=8 ml/kg, RR 12 bpm, FiO2= 100% ). PET CO2 was maintained at 32-38 mm Hg and naso-pharyngeal temperature above 35.5℃. End-tidal isoflurane concentration was continuously monitored. If the patient moved his/her hand, foot, head or body within 60 seconds after skin incision was made the end-tidal isoflurane concentration was increased by 10% in the next patient; if the patient did not respond to skin incision the end-tidal concentration of isoflurane was decreased by 10% in the next patient. The initial end-tidal isoflurane concentration was 1.24% in group A and B, 0.78% in group C, D and E. Results The MAC of isoflurane was 1.24% ± O.14%, 1.22%±0.09%, 0.77%± 0.05%, 0.75% ±0.06%, 0.60%±0.05% in group A, B, C, D, E respectively. Remifentanil significantly reduced MAC of isoflurane in group C, D and E as compared with group A. The MAC of isoflurane was significantly lower in group E than in group C. Conclusion Remifentanil infusion at 0.05 μg·kg-1·min-1 combined with large dose esmolol can reduce MAC of isdlurane by 52% in patients undergoing upper abdominal surgery.
3.A STUDY ON THE FREE SELENICS IN THE SERUM OF RATS AND THEIR KINETICS IN THE MYOCARDIUM
Jiong LI ; Shusheng ZHANG ; Dequan WANG
Journal of Xi'an Jiaotong University(Medical Sciences) 1982;0(04):-
By tracing of ~(75)Se-Na_2SeO_3 incubating and irrigating of the isolated myocardial slices of rats, the numeric relationship between the free selenics in the serum and the serum sdenics, the sodium sdenite doses injected were observed; the absorption of the frce selenics and the serum selenics was compared; the setenics metabolic rate and quantities of the myocardial tissue in different duration after injecting of selcnite, the effect of selenics concentration to the participating were calculated, It is suggested that there is a very close relationship between the free selenics and the selenium metabolism in the myocardium; the ratio betwen the values of the free selenics and the serum selenics may become a stable indicator of the selenium metabolism; the free selenics in the serum may be where the important mediates of selenium metabolism are.
4.Effect of FK506 and Leflunomide on T-cell subsets after islet xenotransplantation
Lei ZHANG ; Shiguang SHAN ; Dequan WU
Chinese Journal of Organ Transplantation 1996;0(04):-
Objective To assess the preventive effects of FK506 and Leflunomide (Lef) on islet xenograft acute rejection in rat-to-mouse models. Methods The islets of rat were transplanted under the kidney capsule of streptozotocin-induced diabetic mouse. The recipients were randomly divided into control group, un-treatment group, mono-therapy group and combination-therapy group. All immunosuppressants were administrated daily from 0 to 9 days. CD4 +\, CD8 + T-cell subsets and IL-2 were examined on the 5?th day after transplantation. Results Compared with un-treatment group, xenoislet survival could be significally prolonged in mono-therapy group. Combination-therapy of FK506 with Lef could significantly prolong the survival of xenoislet when compared with FK506 or Lef used alone. The number of CD4 + T-cells in mono-therapy group and combination-therapy group was much less than in un-treatment group. Conclusion Both FK506 and Lef can suppress proliferation of CD4 + T-cells and prevent or delay islet xenograft rejection.
5.Protective effect of heme oxygenase-1 induced by doxorubicin on hepatic ischemia-reperfusion in rats
Haishan ZHANG ; Xuewen ZHANG ; Damin WANG ; Dequan LIU ; Deheng ZHANG
Journal of Jilin University(Medicine Edition) 2006;0(04):-
0.05).The results of Western blotting and immunohistochemical method showed that HO-1 protein expression increased in DOX group and DOX-IR group,and was negative in normal group.More distruction of ultrastructural changes of hepatic cells in IR group was found than in DOX-IR group by transmission electron microscope.Conclusion Doxorubicin pretreatment could protect the liver from ischemia-reperfusion injury,which may be related to HO-1 expression induced by doxorubicin,low dosage of doxorubicin does little harm to rat liver.
6.Simultaneous Determination of Nine Nucleosides in Fritillaria taipaiensis P. Y. Li from ;Different Producing Areas by RP-HPLC
Jing LUO ; Hua ZHANG ; Dequan ZHANG ; Sisi YANG ; Nong ZHOU
Chinese Journal of Information on Traditional Chinese Medicine 2016;23(9):106-109
Objective To develop a sensitive and reliable RP-HPLC method for the simultaneous determination of nine nucleosides including uracil, cytidine, guanine, uridine, adenine, guanosine, thymidine, adenosine and 2'-deoxyadenosine from Fritillaria taipaiensis P. Y. Li that had been cultivated in different producing areas; To compare the contents of these nucleosides from different producing areas. Methods The analysis was performed on a Venusil MP C18 (2) column (4.6 mm×250 mm, 5 μm) with a gradient of methanol-water at a flow rate of 1.0 mL/min;the detective wavelength was set at 260 nm; the column temperature was set at 35 ℃. Results Uracil, cytidine, guanine, uridine, adenine, guanosine, thymidine, adenosine and 2'-deoxyadenosine were obtained in the good linear range of 0.269 5–16.17 μg/mL, 0.132 1–7.927 5 μg/mL, 0.095 5–5.73 μg/mL, 1.16–69.6 μg/mL, 0.48–28.8 μg/mL, 0.571 5–57.15 μg/mL, 0.526–52.6 μg/mL, 3.307 5–198.45 μg/mL, 0.530 5–31.83 μg/mL, respectively (r≥0.999 5);the recovery was in the range of 96.49%–101.65%(RSD≤2.92%). Conclusion The contents of the nine nucleosides from different producing areas have differences. Fritillaria taipaiensis P. Y. Li from Xianyi Village, Chengkou County, Chongqing City, whether the cultivated ones or wild ones, contain the highest level of nucleosides. The established method can provide references for the perfection of quality standard for Fritillaria taipaiensis P. Y. Li.
7.Comparison Between Varian Localization System and Tosplane Localization System
Dequan YU ; Hong GAO ; Qiuju SHAO ; Xi ZHANG
Chinese Medical Equipment Journal 1989;0(01):-
Objective To investigate precision error between Varian auri-point localization system and Tosplane digital-bed localization system. Methods Varian Eclipse localization method and Topslane localization method were used separately to locate one target area for one same patient. Then deviations on the tumor center coordinate were measured under the simu- lation localization machine. Results Under two localization methods, the length error: 1.7mm ?0.3mm; the width error: 0.5mm?0.4mm; the altitude error: 1.2mm?0.4mm. Conclusion The curative effect of radiotherapy would be improved by applying the Topslane localization bed to the Varian Eclipse plan system.
8.Effect of esmolol on bispectral index in patients undergoing orotracheal intubation during induction of anesthesia
Dequan CAO ; Yanping CHEN ; Yanling ZHANG ; Yetian CHANG
Chinese Journal of Anesthesiology 2010;30(z1):13-14
Objective To evaluate the effect of esmolol on bispectral index (BIS) in patients undergoing orotracheal intubation during induction of anesthesia and to investigate the mechanism of inhibiting the cardiovascular responses to tracheal intubation.Methode Forty patients in physical status of ASA Ⅰ or Ⅱ and aged 20-60 years were randomly divided into 2 groups ( n = 20 each): esmolol group (group E) and control group (group C). Anesthesia was induced with midazolam 0.1 mg/kg, fentanyl 5 μg/kg and vecuronium 0.1 mg/kg. In group E, esmolol 1 mg/kg was given intravenously before anesthesia induction and followed by an infusion of esmolol 250 μg· kg- 1·min-1, while a comparable volume of saline was given for group C. Mean arterial pressure (MAP), heart rate (HR) and BIS were recorded before esmolol administration, before induction of anesthesia, before orotracheal intubation, and at 1, 2 and 5 min after intubation, respectively.Results There were no significant differences in HR, MAP and BIS between the two groups before tracheal intubation. HR and MAP significantly increased after tracheal intubation in both groups, but BIS only in group C significantly increased after intubation.HR, MAP and BIS were significantly lower after intubation in group E than in group C ( P< 0.05).Conclusion Esmolol can decrease BIS during tracheal intubation and its antinociceptive property is related to the mechanism of inhibiting cardiovascular responses to tracheal intubation.
9.Influence of microextension on clinical target volume delineation in adenocarcinoma and squamous cell carcinoma among patients with non-small cell lung cancer
Weike ZHANG ; Limei XIE ; Zhongshan WANG ; Dequan PANG
Chinese Journal of Radiation Oncology 2017;26(5):522-526
Objective To better understand the relationship between the maximum tumor diameter and the most distant micrometastases in different types of non-small cell lung cancer (NSCLC) and to provide histological evidence for the delineation of clinical target volume (CTV) from gross tumor volume.Methods We retrospectively studied the pathological specimens from 113 surgically treated NSCLC patients (44 squamous cell carcinoma patients and 69 adenocarcinoma patients) who were admitted to our hospital from 2014 to 2015.The maximum tumor diameter was determined by a combination of gross and microscopic measurements.Micrometastases were microscopically determined.The distances between the tumor edges and micrometastases outside the tumor boundaries were measured by an ocular micrometer followed by a calculation.Quantitative data were analyzed by t test, and qualitative data were analyzed by logistic regression.Results The regression relationship between the maximum tumor diameter and micrometastases was significant in the adenocarcinoma group, but not significant in the squamous cell carcinoma group (P=0.151).The association between the presence or absence of lymph node metastasis and the most distant micrometastasis was significant in the adenocarcinoma group, but not significant in the squamous cell carcinoma group (P=0.597).No association between the degree of tumor differentiation and the most distant micrometastasis was observed in either group (P=0.113).The average measurement of the most distant micrometastases was 2.94 mm in the adenocarcinoma group, with 7.5 mm as the distance to cover 95% of the most distant micrometastases.To reach the same coverage, 4 mm was needed for tumor size smaller than 3 cm, 6 mm for those between 3 cm and 5 cm, and 7.5 mm for those larger than 5 cm.The average measurement of the most distant micrometastases was 2.69 mm in the squamous cell carcinoma group, with 6 mm as the distance to cover 95% of the most distant micrometastases.Conclusions For NSCLC, the most distant micrometastasis of adenocarcinoma is associated with the maximum tumor diameter and presence or absence of lymph node metastasis, and the CTV should thus be adjusted accordingly;no relevance between the most distant micrometastasis and maximum tumor diameter is observed in squamous cell carcinoma;there is no relationship between the most distant micrometastasis and the degree of tumor differentiation in adenocarcinoma and squamous cell carcinoma.
10.Research progress of MicroRNA in colon cancer
Haogang ZHANG ; Xunzheng XU ; Pengfei QIAO ; Dequan WU
Chinese Journal of Postgraduates of Medicine 2017;40(9):861-864
Colon cancer is a common malignant tumor. Early diagnosis and treatment is one of the most important clinical challenges. Since MicroRNA is discovered to closely relate to cancer, it has been suggested to be used in the diagnosis and treatment of cancer. This review focuses on recent advances in the diagnosis and treatment of MicroRNA in colon cancer and the role of MicroRNA in Wnt signaling pathways and epidermal growth factor receptor (EGFR) signaling pathways.