OBJECTIVE: To develop an HPLC method for content determination of protocatechualdehyde in Tong-jingkang oral liquid.METHODS:Zorbax Eclipse XDB-C18(250 mm?4.6 mm,5 ?m) was used as chromatographic column with mobile phase consisted of methanol-water-formic acid(20∶79.5∶0.5) at a flow rate of 1.0 mL?min-1.The detection wavelength was set at 280 nm and the temperature of column was kept at room temperature.RESULTS: The linear range of protocatechualdehyde was 0.025～0.5 ?g(r=0.999 9) with an average recovery of 101.1%(RSD=2.29%,n=6).CONCLUSION: The established method is simple,accurate and it is applicable for the quality control of Tongjingkang oral liquid.

Objective To evaluate the therapeutic efficacy of percutaneous transhepatic portal vein catheterization and thrombolysis on superior mesenteric vein thrombosis.Methods The treatment and therapeutic efficacy of 15 cases of patients with superior mesenteric vein thrombosis underwent percutaneous transhepatic portal vein catheterization and thrombolysis from January 2000 to April 2011 were retrospectively analyzed.Results Percutaneous transhepatic portal vein catheterization was performed successfully in 15patients,without pneumothorax,bile leakage and intra-abdominal hemorrhage after catheterization.Eleven patients had good thrombolytic effect,with majority or complete recanalization on superior mesenteric vein,portal vein and splenic vein.The rate of recanalization Was 73.3％,total mortality was 13.3％.The total amount of urokinase was not more than 500 million U,and there was no cases with systemic bleeding.From 6 months to 36months follow-up,there was no increased portal vein system thrombosis and recurrent cases.Conclnsion Thrombolysis technique of percutaneous transhepatic portal vein catheterization is easy to master,and with good effect of local infusion thrombolytic therapy and lower complication rate.It's a selectable treatment for superior mesenteric vein thrombosis.

Objective:To compare bone marrow-sparing intensity-modulated radiotherapy(BMS-IMRT)with conventional (four-field box[3DCRT]and anteroposterior-posteroanterior[CRT])techniques in the treatment of cervical cancer.Methods:For a cohort of 10 patients,BMS-IMRT,3DCRT and CRT planning were designed.The prescribed dose was 45Gy/1.8Gy/25f,95%of the planning target volume received this dose.Doses were computed with a commercially available TPS.Plans were compared according to dose-volume histogram (DVH)analysis in terms of PTV homogeneity and conformity indices(HI and CI)as well as OARs dose and volume parameters.Results:BMS-IMRT had an advantages over 3DCRT and CRT in terms of CI,but inferior to the latter two for HI.BMS-IMRT was superior to 3DCRT in reducing the dose to PBM,small bowel,bladder and rectum.Compared with CRT,BMS-IMRT reduced the volume irradiated to the doses from 30Gy to 40Gy,but increased the volume irradiated to the low doses from 5Gy to 20Gy.In addition,BMS-IMRT reduced the volume of small bowel,bladder,rectum at nearly all dose levels.Conclusion:BMS-IMRT reduced irradiation of PBM compared with 3DCRT technique.Compared with CRT technique,BMS-IMRT reduced the volume of PBM irradiated to high doses.Therefore,for patients with cervical cancer after hysterectomy,BMS-IMRT might reduce acute hematologic toxicity(HT)compared with conventional techniques.

Objective To study the effect of the location and volume of tumors on the normal lung dose-volume parameters for lung cancer. Methods An sphere with a diameter of 2 cm made of tissue-equiv-alent material used for simulating tumor was inserted into the superior lobe, middle lobe, inferior lobe of the right lung, and superior lobe, inferior lobe of the left lung of the Rando phantom, respectively. 5-field sIM-RT plans were designed. The prescribed dose was 60 Gy/2 Gy/30 f, and 99% of the planning target volume received this dose. Dose-volume parameters of normal lung tissue including V_5, V_(10), V_(20), V_(30), V_50 and mean lung dose were analyzed and compared. Results For the dose-volume parameters, the diameter and the po-sition of the tumor have a significant effect (P < 0.05). With the diameter expanding from 2 cm to 3 cm,the parameters associated with tumor in various lobes increased by a range between 3.83%-125.38%,while the parameters linked with tumor in different lobes increased by a range between 10.46%-51.46% with the diameter expanding from 3 cm to 4 cm. Conclusions Location and diameter of sphere-like tumor have obvious effect on dose-volume parameters. Knowing about the degree of influence will help oncologists and physicists to evaluate treatment planning better and reduce radiation pneumonitis.

Objective To compare bone marrow-sparing intensity-modulated radiotherapy (BMS-IMRT) with conventional intensity-modulated radiotherapy (IMRT) without considering pelvic bone marrow (PBM) as a planning constraint in the treatment of cervical cancer after hysterectomy. Methods BMS-IM-RT and IMRT planning were separately designed in a cohort of 10 patients with cervical cancer after hysterec-tomy. The prescribed dose was 95% planning target volume receiving 45 Gy/25 f. A commercially available TPS with convolution/superposition (CS) algorithm was used for dose calculation. Plans were compared ac-cording to dose-volume histogram (DVH) analysis in terms of PTV homogeneity (HI), conformity index (CI) as well as dose and volume parameters of organ at risks (OARs). Results BMS-IMRT was better than IMRT in terms of CI, but inferior to the latter for HI. When compared with IMRT, V_5, V_(10), V_(20), V_(30) and V_(40) of PBM in BMS-IMRT were reduced by 1.81% ,8.61% ,31.81% ,29.50% and 28.29%, respec-tively. No statistically significant differences were found between BMS-IMRT and IMRT for dose distritutions of the small bowel, bladder or rectum. Conclusions For patients with cervical cancer after hysterectomy, BMS-IMRT can reduce the PBM volume irradiated by low dose, which may reduce acute hematologic toxici-ties.

Objective To establish a rat model of superior mesenteric vein thrombosis by vein ligation and to simulate the pathological process of the disease, and to provide the basis for studies of its pathogenesis and treatment.Methods Ninety-six SPF male SD rats were randomly divided into three groups: Group A (sham operation group), group B (strangulation group) and group C (simple group), 32 rats in each group.Rats in group A were only opened the abdominal cavity but not blocked the blood supply.The rats were sacrificed at 8, 24, 48 and 72 h after operation.The rats in groups B and C were subjected to establish the strangulation and simple models by superior mesenteric vein thrombosis, respectively, and were sacrificed at 8, 24, 48 and 72 h after modeling.Histological changes (H&E staining) in the rat intestinal tissues were evaluated by a pathological scoring system.The levels of intestinal fatty acid binding protein (IFABP) and α-glutathione S-transferase (α-GST) were detected by ELISA.Results The rat model of mesenteric vein thrombosis was successfully established, with a success rate of 100% (96/96).The pathological analysis revealed that compared with the group A, different degrees of blood stasis and injuries were observed in the intestinal tissues of groups B and C, and the injury were gradually increased in the group B, while gradually reduced in the group C.The degrees of blood stasis and injury were positively correlated with the scope of ligation.The result of ELISA showed that the serum levels of IFABP and α-GST of the rats in groups B and C were significantly higher than those in group A (P < 0.05), and the degree of elevation was positively correlated with the scope of ligation.Conclusions In this study, the rat model of superior mesenteric vein thrombosis is successfully established by vein ligation.This model is simple and easy to operate with a high success rate, and can be used in related research.

Objective To assess the safety and efficacy of preoperative intensity-modulated radiotherapy(IMRT) with oral capecitabine in patients with locally advanced mid-low rectal cancer using a simultaneous integrated boost (SIB) of tomotherapy.Methods Total 16 patients with resectable locally advanced mid-low rectal cancer (patients with T3 to T4 and/or N ± rectal cancer) were enroll in current study.Patients were received IMRT to 2 dose levels simultaneously (55 and 47.5 Gy in 25 fractions) with concurrent capecitabine 825 mg/m2 twice daily,5 days/week.Total mesorectal excision was performed at 8 to 9 week after the completion of chemoradiation.The primary end point included side effect,the rate of sphinctersparing,postoperative complication and pathological complete response rate (pCR) were observed.Side effects were scored using the National Cancer Institute Common Terminology Criteria for Adverse Events version 3.0.Results All patients were received chemoradiotion therapy without any break.Tomotherapy showed superiority with respect to target coverage,homogeneity and conformality.Two patients refused to perform radical surgery because of almost complete primary tumor regression and complete symptom relief after neoadjuvant therapy.Fourteen patients underwent surgical resection and 11 patients (78.6％) underwent sphincter-sparing lower anterior resection.Four patients(28.6％) had a pathological complete response.The incidence of grade 1-2 hematologic,gastro-intestinal toxicities were 62.5％ (10/16) and 18.8％ (3/16).The incidence of grade 3 skin toxicities were 68.8％(10/16).Grade Ⅳ side effect was not observed.Surgical complications (incisional infection on thirteen after surgery) were observed in 1 patient.Conclusion Preoperative simultaneous integrated boost of tomotherapy with concurrent oral capecitabine is safe and well tolerated in patients with a promising local control.However,a larger number of patients and a long follow-up are required to assess its potential superiority.

Objective: To compare inverse three-dimensional conformal radiotherapy (Inv 3D-CRT) and intensity modulated ra-diotherapy (IMRT) for non-small cell lung cancer. Methods: For a cohort of 10 patients, Inv 3D-CRT and three groups of IMRT plannings were designed for per patient. The prescribed dose was 60 Gy/2 Gy/30f, 95% of the planning target volume received this dose. Dose was computed with a commercially available TPS using convolution/superposition (CS) algorithm. Plans were compared according to the PTV_(95)V_(20) ratio (PTV_(95)V_(20)) and D_(max)-D_(min). Results: Compared with Inv 3D-CRT, the PTV_(95)V_(20) ratio of three groups of IMRT increased by 1.08 (P = 0.014), 0.72 (P = 0.089) and 0.42 (P = 0.318), respectively. Conclusions: For NSCLC, IMRT can reduce the dose to the lungs compared with inverse 3D-CRT by improving the conformity of the plan and is worth spreading in clinical work.

Objective To explore the effect of TNF-αon expression of TROP-2 and to explore the role of TROP-2 in the metastasis and invasion of colon cancer HCT-116 cells. Methods HCT-116 cells were cultured and treated with 0, 10, 20, 30, 50, 100 and 200μg/L TNF-α. Cell viability was assessed by MTT. The expression of TROP-2 was determined by western blot. The effects of 20μg/L TNF-αon cell migration and invasion were investigated by wound healing assay and Transwell method. Small interfering RNA (siRNA) was used to knock down endogenous TROP-2 expression. The transcrip?tion and translation levels of TROP-2 were detected by qPCR and Western blot respectively. The migratory and invasive ca?pability of HCT-116 cells transfected with TROP-2 siRNA were checked by wound healing assay and Transwell method re?spectively. Results There is no significant change of cell viability between HCT-116 cells treated with 0,10, 20, 30 and 50μg/L TNF-α, but cell viability of HCT-116 decreased significantly with treatment of 100μg/L and 200μg/L TNF-α. Low concentration of TNF-α(≤50μg/L) led to increase of TROP-2 protein expression that peaks when 20μg/L TNF-αwas add?ed. High concentration of TNF-α(100, 200μg/L) result in decrease of TROP-2 protein. TROP-2 siRNA significantly down-regulated the expression of TROP-2 at both mRNA and protein levels in colon cancer HCT-116 cells. Compared with con?trol group, silencing TROP-2 by TROP-2 siRNA inhibited the migratory and invasive capability of HCT-116 cells. Wound healing rate and the number of transwell cell both decreased in siRNA group compared with those of control group ( P <0.05). Conclusion The mechanism that low concentration of TNF-α promoted HCT-116 cells migration and invasion might be through up-regulating the expression of TROP-2.

Objective To investigate the expression change of RACK1 ,Src and Bcl‐2 in gastric carcinoma tissue and adjacent carcinomatous tissue .Methods Eighty specimens of gastric carcinoma and adjacent carcinomatous tissues in our hospital from Au‐gust 1 ,2011 to February 1 ,2014 were collected .The immunohistochemistry staining and Western blotting methods were adopted to detect the expression of RACK1 ,Src and Bcl‐2 protein in gastric carcinoma and adjacent carcinomatous tissues ,and their correlation was analyzed and performed the statistical analysis by combining with the clinicopathological data .Results The immunohistochem‐istry staining and Western blotting detection displayed that the expression positive rate and expression level of RACK 1 in gastric carcinoma tissue were obviously lower than those in the adjacent carcinomatous tissue ,while the expression positive rate and ex‐pression level of Src and Bcl‐2 in gastric carcinoma tissue were obviously higher than those in the adjacent carcinomatous tissue ,the differences were statistically significant (P<0 .05) .The RACK1 expression in gastric carcinoma tissue was negatively correlated with the Src and Bcl‐2 expression(r= -0 .632 ,-0 .754 ,P<0 .01) ,while Src had no obvious correlation with Bcl‐2 protein(r=0 .217 ,P>0 .05) .Conclusion The expression of RACK1 in gastric carcinoma tissue is significantly decreased ,while the expres‐sions of Src and Bcl‐2 are increased .