Objective To evaluate the role of ?-irradiation with a liquid 188Re-filled balloon for limiting neointimal proliferation. Methods Balloon overstretch injury was performed in carotid arteries of 12 rabbits and randomly assigned to two groups: the control group (n=6) and the radiation group (n=6), using the liquid 188Re-filled balloon designed to deliver 15 Gy at 0.5 mm from the surface of vessel. All animals survived and were sacrificed in 1 week. Histopathologic analysis was performed. Results The intimal area of radiation group was significantly smaller than that of the control group [(0.04?0.06) mm 2 vs (0.16?0.04) mm 2, P

BACKGROUND:Electrospinning preparation for the tissue engineering scaffold materials is an extremely promising technology.
OBJECTIVE:To review the progress of electrospinning technology in different fields and its main problems in the current application.
METHODS:We searched Medline and CNKI databases for articles published from 2000 to 2013 using the keywords of“electrospinning, tissue engineering”in English and Chinese.
RESULTS AND CONCLUSION:The structure of non-woven cloth materials made by this technology is similar to the extracel ular matrix, which has high surface area and control able mechanical properties. Electrospinning materials have been widely applied in the tissue engineering field, especial y in the biodegradable materials and high biocompatibility molecular polymer synthesis process. Electrospinning has been developed rapidly in tissue engineering applications, especial y in the choice of materials or electrospinning technique combined with different technologies. Different morphological structures and properties of the materials can be wel combined by using electrospinning technology. A series of new polymers were successful y incorporated into a tissue engineering scaffold as the matrix for cel proliferation and regeneration, but there are some important issues to be solved, including how to control the interaction between the scaffold and the biological system that is to achieve the infiltrative growth of cel s, how to control the pore size, mechanical properties and toxicity. This technology clinical y applied in biomedicine stil requires further research, especial y in vivo studies.

With the strengthening of nuclear weapon development and the expanding of neutron application in economic area,the injury accidents of neutron radiation are happening from time to time.Neutron exposure,with high linear energy transfer,has high casualty rate,severe symptom and poor prognosis.In comparison with low-LET radiation damage,neutron irradiation induced injuries are more difficult to rescue.This review focused on the recent research progresses of radiation effects,intrinsic mechanisms and clinical prevention measures of neutron radiation,and to provide a theoretical clue for establishing an effective prevention protocol of neutron radiation damage.

Objective To compare the therapeutic effects of three therapeutics to earlier primary gastric diffuse large B cell lymphoma(PG-DLBCL).Methods By reviewing a data-base of 66 patients with earlier PG-DLBCL from Aug 2000 to Oct 2011 were enrolled,patients were divided into chemotherapy alone(21 cases),radiotherapy combined with chemotherapy(22 cases) and surgery followed chemotherapy group(23 cases),and to comparing the prognosis of the three therapeutics.Results The complete remission rates(CR) of the three groups was 47.6％,77.3％,65.2％ (P ＞ 0.05).The median progression-free survival(PFS)of the three groups in 66 patients was 61.5,90.4 and 79.1 months,the radiotherapy combined group was proven to be significantly better than chemotherapy alone group and surgery followed chemotherapy group(x2 =6.726,P ＜0.05).The 3-year survival rate of the three groups was 81.6％,90.5％ and 82.6％.The five year survival rate was 72.5％,90.5％,82.6％.There was no significant difference (P ＞ 0.05) in 3-year survival rate and 5-year survival rate.Conclusions Radiotherapy combined with chemotherapy can significantly improve the PFS without increasing the risk of other adverse outcomes,and could be the first treatment way for the earlier PG-DLBCL.

Objective To explore the diagnosis and treatment of iatrogenic bile duct injury during choledochocystectomy. Methods Clinical data of 24 cases of iatrogenic bile duct injury were analyzed retrospectively from 2005 to 2009. Results Eight patients underwent early repair of bile duct within 4 days after the injury. 14 patients with later recognized bile duct injury underwent selective operations, and two patients were discharged after their jaundice were relieved without any surgical treatment. Supporting T tubes were left in place in 22 patients for 8 to 14 months after operations, without any biliary obstruction found after one year and six months to five year follow-up. Conclusions Early bile duct injury within 4 days was easily treated, but later bile duct injury should have selective operation. The patients with jaundice could be diagnosed with PTCD and ERCP to observe the bile duct injury. During operation membrane-to-membrane wide hepatojejunostomy helps prevent later anastomotic stenosis. The left in drainage tube in anastomotic stoma for more than 8 months improves success rate in the process of injuried bile duct repair.

Objective To analyze the value of serum procalcitonin (PCT) in patients with community acquired pneumonia (CAP),and to evaluate the role of PCT in the therapeutic effect,severity and prognosis.Methods A retrospective analysis of data and laboratory tests of 50 patients with CAP admitted from November 15,2011 to November 15,2012 in GICU was carried out.Patients with infection of other parts of body,surgical treatment and trauma were ruled out.The level of PCT (ng/mL) before and during treatment,and the relationships between PCT and respiratory failure,mechanical ventilation,treatment results were analyzed respectively.Results According to the occurrence of sepsis,50 patients were divided into sepsis group and non-sepsis group.In the non-sepsis group,the PCT level before treatment,the highest and average PCT levels during the treatment were 0.1125 (0.078,0.269),0.1235 (0.078,0.494),and 0.1355 (0.08,0.245) respectively.Correspondingly,the PCT levels in the sepsis group were 8.92 (2.715,16.33),13.53 (6.305,25.625),and 4.26 (2.1415,8.2455),and there were statistically significant differences in three values of PCT between groups (ZIst =-4.743,PIST ＜ 0.05 ; ZMax =-5.783,PMax ＜ 0.05 ; ZMean =-5.644,PMean ＜ 0.05).According to the emergence of respiratory failure during treatment,average PCT level in the patients with respiratory failure was 1.7375 (0.224,5.092),and that in the patients without respiratory failure was 0.081 ng/mL (0.049,0.146),presenting the statistically significant difference between two groups (Z =4.472,P ＜ 0.05).In case of using mechanical ventilation (MV),the average PCT level of the patients with mechanical ventilation was 1.618 ng/mL (0.224,5.092),and that in the patients without MV was 0.086 ng/mL (0.061,0.465),producing a significant difference between the two groups (Z =-3.788,P ＜ 0.05).Grouped according to the outcome of patients,the mean value of PCT level in death group was 7.4585 ng/mL (2.392,16.25),and that in the survival group was 0.1965 ng/mL (0.885,0.618),showing statistically significant difference between two groups (Z =3.857,P ＜ 0.05).The first PCT level in the GICU within 24 h after admission was used to make the receiver operating characteristic curve (ROC),and the area under the curve (AUC) was 0.9867,cutoff point was 1.25 ng/mL.Conclusions In case of CAP,the PCT level in patients with sepsis is significantly higher than that in patients without sepsis,and PCT can distinguish sepsis from pneumonia precisely.In addition,PCT is an important biomarker to judge the severity and outcomes of CAP at early stage.

Objective To compare the effect and safety of rituximab plus CHOP (R-CHOP) and CHOP regimens for the treatment of newly diagnosed patients with early-stage primary gastric diffuse large B-cell lymphoma (PG-DLBCL). Methods A total of 65 patients with PG-DLBCL were retrospectively divided into two groups: 35 patients were treated with R-CHOP regimen, the others with CHOP regimen. NHL international efficacy assessment and WHO criteria were used to assess the therapeutic and the adverse reactions respectively. Results The complete remission (CR) rate of R-CHOP group was 74.3 % (26/35), which was significantly higher than that of CHOP group [50.0 % (15/30), P< 0.05], but the adverse reactions rates of two groups had no significant difference (P>0.05). The Kaplan-Meier survival analysis showed that the five-year survival rates of two groups had no significant difference (88.6%vs 75.0%, P>0.05). The PFS of R-CHOP group was better than that of CHOP group (94.4 months vs 74.9 months, P< 0.05). Conclusion Compared with CHOP regimen , R-CHOP regimen increases the therapeutic efficacy in patients with PG-DLBCL, and dose not increase the adverse reactions.

AIM: To observe the changes of transient receptor potential channel 5 (TRPC5) in vascular smooth muscle cells ( VSMCs) of apolipoprotein E-knockout ( ApoE-/-) mice and the effect of atorvastatin interference, and to investigate the mechanism of atorvastatin therapy.METHODS:Male ApoE-/-mice at 6 weeks of age were used to establish the atherosclerosis model by feeding with hyperlipidic diet.The mice were randomly divided into model group and atorvastatin group.The mice in atorvastatin group were lavaged with atorvastatin at 20 mg· kg-1 · d-1 , while the mice in model group received normal saline.The healthy C57BL/6J mice with the same age and the same genetic background, feeding with ordinary food, served as control group.At the time points of 14 and 24 weeks, the mice were sacrificed.The serum was collected for detecting the lipid levels.The aortic roots of the heart were taken to make paraffin sections with HE staining for measuring and comparing the relative atherosclerotic plaque area in each section.The expression of TRPC5 in VSMCs was examined with immunohistochemical staining.The mRNA levels of TRPC5 in the serum and the thoracoabdom-inal aorta were measured by real-time PCR.RESULTS: Compared with model group, blood lipids in atorvastatin group were significantly decreased, and the formation of plaque under aorta intima also decreased.The protein expression of TR-PC5 in atorvastatin group decreased significantly compared with model group.Compared with 20-week model group, TRPC5 in 30-week model group showed increasing tendency, but has no statistical significance.Compared with 20-week atorvasta-tin group, TRPC5 of 30-week atorvastatin group declined.CONCLUSION: Atorvastatin suppresses TRPC5 expression, thus attenuating atherosclerotic development in ApoE-/-mice.

Objective To evaluate the similarities and differences between four-dimensional radiotherapy (4D-CT ) and active breathing control techniques(ABC) in respiratory management in lung radiotherapy ,and investigate the indications and feasibility of different breathing control techniques for different patients .Methods Twenty-one patients treated with lung radiotherapy received respiratory management .4D-CT technology was used in 11 patients ,while ABC technology was adopted in the rest 10 .The ratios of planning target volume(PGTV) to gross tumor volume(GTV)[(PGTV/GTV)] were calculated .The differences between these two respiratory management technologies were compared in terms of the PGTV ,positioning time ,planning time and treatment time to investigate the indications .Results 4D-CT technology had higher PGTV/GTV ratio ,and shorter positioning time and irradiation time than ABC technology(P<0 .05) ,but there was no significant difference in the planning time(P>0 .05) .In patients with ABC and 4D-CT technology ,objective response rates were 50 .0% ,45 .5% ,respectively ,and the radiation pneumonitis rates were 30 .0% ,27 .3% ,respectively .There was no significant difference in both groups (P>0 .05) .Conclusion In lung tumor radiothera-py ,ABC can reduce irradiation volume ,suitable for patients with good performance status .4D-CT is time-saving and well tolerated , suitable for patients with smaller tumors .

Objective To summarize the long term effect of the whole-breast external beam radiation therapy after breast conserving surgery coupled with brachytherapy or local electronic boost radiation. Methods The survival rate and cosmetic results were retrospectively analyzed for 96 patients with early stage breast cancer received breast conserving surgery and hormone therapy from January 1995 to December 2003 in Yunnan Tumor Hospital. The enrolled conditions included single lesion, tumor maximum diameter ≤ 3cm, microscopically negative surgical margin, negative axillary lymph node dissection, and pathological type of invasive ductal carcinoma. 53 cases with comprehensive follow-up data were selected. Among them, 23 cases were treated with whole breast tangent conventional fractionated irradiation: 46-50 G/23-25 fractions, local tumor bedarea with high dose-rate brachytherapy: 8-10 Gy/1-2 fractions in postoperative,and 30 cases in control group were treated with electron beam irradiation of 10 Gy/5 fractions. The efficacy and cosmetic results were observed in every three months within two years,in every six months from three to five years, and in every year five years later. Results All the patients were followed up for 217 months (average follow-up 165 months), of which 2 patients died of distant metastasis 62 months and 158 months later after treatment. The excellent cosmetic result was more than 78%, and no local recurrence was observed in the group. The 3-,5-,10-and 15-years survival rates were 100%,100%,95.7%and 88.3%,respectively. In control group,3 patients were died of distant metastasis 46 months,97 months and 87 months later after treatment,also with excellent cosmetic results. There was only one case of local recurrence,and the local control rate was 97.0%. The 3-,5-,10-and 15-years survival rates were 100%,96.7%,93.6%and 82.3%, respectively. There was no significant difference in local recurrence and survival rates between the two groups ( >0.05) . Conclusion Both radiation brachytherapy and electronic boost have the same effect and good cosmetic results. The radiation brachytherapy shows a high quality of life and a short treatment time.