Objective To discuss the feasibility of double-low technique applied in aortic MSCTA.Methods Totally 70 patients with BMI not more than 25 kg/m2 were divided into a routine group and an experimental group randomly and equally,and then went through aortic MSCTA.Iohexol (350 mgI/ml) was injected with the velocity of 4 ml/s.The routine group had the parameters as 120 kV,120 mAs and 1.5 ml/kg contrast agent,and the experimental group had the parameters as 90 kV,120 mAs and 1.0 ml/kg contrast agent,while the other scanning parameters were kept the same in the two groups.The radiation doses,contrast agent doses and iodine contents were recorded in the two groups,and the image quality was assessed with double-blind method objectively and subjectively.Results The experimental group had the CT dose index volumes (CTDIvol),dose length product (DLP) and effect dose (ED) significantly lower than those in the routine group (P＜0.05).The two groups had the consistency of subjective scores (Kappa＞0.6) and image quality scores (not lower than 2) meet the desired requirements,and there were no significant differences between the scores (P＞0.05).Objective evaluation showed that the signal values of aortic trunk and major branch vessels as well as image noise SD of the experimental group were obviously higher than those in the routine group (P＜0.05).There were no statistical differences between the signal noise ratios (SNR) and contrast to noises (CNR) in the two groups (P＞0.05),The iodine content in the contrast agent of the experimental group was significantly lower than that in the routine group (P＜0.05).Conclusion Double-low technique applied in aortic MSCTA of the patient with BMI not more than 25 kg/m2 reduces the radiation dose and iodine content in the contrast agent,has the image quality meet the desired requirements,and thus is of great value for clinical application.

Objective To explore the clinical application of sural neurovascular flap with anastomosing small saphenous vein to be transferred distally for repairing soft tissue defect of the leg.Methods Seven patients with soft tissue defects in the distal one third of anterior tibia,the foot dorsum,the heel or the ankle were treated with the distally based sural neurovascular flap with anastomosing small saphenous vein.The size of the flap ranged 8 cm?6 cm ~ 18 cm?10 cm.Results The flaps survived in all the 7 patients,with excellent color and texture.Their appearance and function were satisfactory during 6~40 months of follow-up. Conclusions Use of distally based sural neurovascular flap with anastomosing small saphenous vein is reliable.The performance is simple.This flap has a rich blood supply without the sacrifice of major arteries.Venous blood reflux was unobstructed.It can be used for the reconstruction of soft tissue defects in the distal one third of anterior tibia,the foot dorsum,the heel or the ankle.

Objective To investigate the effect of endovascular cooling on perioperative brain injury in patients undergoing intracranial aneurysm resection.Methods Sixteen Hunt-Hess Ⅱ -Ⅳ patients of both sexes aged 18-64 yr undergoing intracranial aneurysm resection were randomly divided into 2 groups(n = 8 each): mild hypothermia group(group MHT)and nonnothermia group(group NT).A CL-2295AE catheter was placed in the femoral vein after anesthesia induction to perform endovascular cooling.Bladder temperature was reduced to 34 ℃ and maintained for 24 h.The hemodynamic parameters were recorded during and after operation.Coagulantion function and electrolyte levels were determined at 24 h before operation and at 12 and 24 h after operation.The serum neuron-specific enolase(NSE)and S100B concentrations were determined at 1 d before operation and at 1,3and 7 d after operation by ELISA.Neurological function was assessed with GOS grade at 1 and 3 months after operation.Results There was no significant difference in hemodynamic parameters,electrolyte levels(Na+ ,K+ ,Ca2+)and coagulantion function(PT,APTT,Plt)between the two groups(P ＞ 0.05).The GOS grade was significantly higher,while serum NSE and S100B concentrations were significantly lower after operation in group MHT than in group NT(P ＜ 0.05).Conclusion Endovascular cooling(34℃,24 h)can reduce the brain injury safely and effectively during the perioperative period in patients undergoing intracranial aneurysm resection and improve the prognosis.

Radiomics is an emerging tumor diagnosis and auxiliary detection technique that has undergone rapid development in the past few decades.The availability of new imaging equipment and reagents, as well as the use of standardized imaging protocol, has made quantitative and standardized imaging analysis possible.Radiomics is a field of study that involves the extraction of a large number of quantitative features from areas of interest in medical images using data-characterization algorithms, and transformation of these data into first-order or high-order data.The accuracy of clinical diagnosis and prognostic value of radiomics can be further improved by analyzing the relationship between data layers.Although radiomics has many advantages and has made great progress, its standardization, reliability, and application in large data and multicenter studies will need to be further optimized.

BACKGROUND: Type Ⅰ collagen is a specific collagen secreted by in vitro cultured osteoblast, and the formed network is the basis of bone mineralization, which also reflects the ability of osteoblast bone formation. Studies have shown astragalus root increased osteoblast proliferation. However, the effect of astragalus root on improving type Ⅰ collagen expression of osteoblast remains poorly understood.OBJECTIVE: To evaluate the effect of astragalus root injection on the abilities of rat cranium-derived osteoblast proliferation and type Ⅰ collagen expression.METHODS: Rat osteoblast was cultured in vitro and divided into control group (MEM culture solution containing calf serum) and astragalus root groups (different concentrations). The effect on osteoblast proliferation was evaluated on days 1, 3, 5, 7, and 9 by MTT method. Moreover, the expression of type Ⅰ collagen protein was observed after 6 hours of treatment with astragalus root injection using in cell western-blot method. In addition, the gene expression of COLLal was investigated by real-time PCR method.RESULTS AND CONCLUSION: From days 3 to 9, the different concentrations of astragalus root injection improved osteoblast proliferation, respectively compared with control group (P ＜ 0.05), and this ascending trend peaked on day 7. Different concentretions of astragalus root injection improved COLLol mRNA expression, especially 15% astragalus root injection was the most effective. The type Ⅰ collagen protein expression of 15% and 10% astragalus root injection were significantly greater compared with the control group (P ＜ 0.05). Astragalus root injection improved in vitro cultured osteoblast proliferation and type Ⅰ collagen secretion in a certain dose-effect manner.

The classical prescriptions in Typhoid Miscellaneous Disease can be used to alleviate the common hung cancer symptoms and complications like fever, cough, pain and pleural effusion effectively. The preoperative medication can improve lung cancer patients’ surgical tolerance, and postoperative medication can facilitate patients’ postoperative rehabilitation. And if combined with chemotherapy, they cound reduce toxicity and enhance efficiency, enhance the patients’ immunity and improve their life quality. Research shows that classical prescriptions can improve the immunity of lung cancer model mice, facilitate apoptosis of tumor cell and control its migration. This paper sumed up the clinical and experimental research of lung cancer treatment with classical prescriptions in recent 5 years.

Objective Genotype data of nine CODIS STR loci were gathered to examine the features of population differentiation and gene flow of seven Xinjiang minorities.Methods Heterozygosity,Nei's coefficient of genetic differentiation,Nei's genetic distance and Wright's F-statistics were calculated. Statistical tests using exact method were performed to measure the level of differentiation.Phylogenetic trees were constructed by Mega;AMOVA was processed by Arlequin.R-matrix model had been applied to describe the patterns of gene flow.Results It shows that average genetic heterogeneity for each population was above 0.7 with genetic differentiation coefficient below 2%.Statistical tests for population differentiation were significant for most of the loci.Phylogenetic analysis and AMOVA showed that all populations were divided into three main groups.The R-matrix analysis reflected that Uygur,Kirgiz and Ozbek had more amounts of gene flow than other populations,while the pattern of Hui was more isolated.Conclusion The seven minorities in Xinjiang are independent populations,while the level of differentiation is at average.The relationship in evolution is not far from each other,with wide gene flow.

Objective To strengthen the understanding of the imaging features in congenital aberrant left pulmonary artery (CALPA). Methods All 4 patients underwent chest film and Doppler echocardiography. Thres cases were examined by enhanced spiral CT examination. In addition, MRI and DSA were performed in 2 cases respectively. Thres cases were proven by surgery or autopsy. Results (1) appearances on chest films included cardiomegaly, pulmonary overvascularity, left hilum a little lower than the right one, emphysema, atelectasis, and pneumonia. (2) bronchography showed stenosis of trachea and/or bronchia. (3) Barium esophagram showed an imprint on the left anterior wall of esophagus. (4) Contrast-enhanced spiral CT and MRI showed marked dilatation of main pulmonary artery (MPA) and the root of MPA extended backward to become right pulmonary artery (RPA), the left pulmonary artery (LPA) arose from the RPA directly. (5) echocardiography indicated LPA arose from RPA. (6) DSA showed MPA was marked dilated, and LPA arose from RPA. (7) other abnormalities included 3 PDA, 2 PLSVC, and ~1 ASD. Conclusion CT and MRI are the best methods to diagnose CALPA.

BACKGROUND: Pathophysiological mechanism of local microenvironment is complex after central nerve injury; especially,both inflammatory reaction at an acute phase and formation of secondary glial scar have tremendous effects on effective regeneration of axon, regeneration and arrangement of local nerve cells, proliferation and migration of local stem cells;therefore, it becomes a basic reason for blocking nerve repair in an early period. Thus, how to effectively resist inflammatory factors in injured region at an acute phase and how to optimize microenvironment of neural regeneration are the most important strategies for repairing spinal cord injury in recent years.OBJECTIVE: To design, establish and screen the best expression of interleukin-6 receptor (IL-6R) α to inhibit shRNA adenovirus expression vector by using spinal cord injury models.DESIGN: Duplicative measurement study.SETTING: Department of Spine Surgery, the Second People's Hospital of Shenzhen.MATERIALS: A total of 40 healthy Wistar rats, either gender, 8-10 weeks old, were selected in this study. Rabbit-anti-rat glial fibrillary acidic protein (GFAP) antibody Ⅰ was provided by Santa Cruz Compan; siRNA eukaryon expression plasmid pGenesil (cohtaining green fluorescent expression system) was provided by Wuhan Jingsai Bioengineering Company.METHODS: The experiment was carried out in ImmuneOpening Laboratory, Basic Medical Faulty, Tongji Medical College, Huazhong University of Science and Technology, and Medica Laboratory Center, the Second People's Hospital of Shenzhen in November 2006. Three pairs of shRNA template which composed of 19 bp reverse repeated motif of IL-6 receptor (IL-6R) α target sequence with 9 bp spacer were designed and synthesized, then the recombinant adenovirus expression vectors with green fluorescence protein were constructed in vitro respectively. The acute spinal cord injury models were completed, and the adenovirus recombinants were regionally injected post 12 hours after spinal cord injury;in addition, the inhibitory effect of RNA interference (RNAi) on expression of IL-6R in local region after spinal cord injury were detected by using real-time fluorescence quantitative reverse transcription polymerase chain reaction (RT-PCR) and Western blot so as to screen adenovirus expression vector which had the best inhibitory effect on expression of IL-6R.MAIN OUTCOME MEASURES: Inhibitory effect of RNAi on expressions of IL-6R RNA and protein in local region after spinal cord injury.RESULTS: Sequence analysis showed that IL-6R-shRNA recombinant adenovirus expression vector was successfully constructed, and optimal IL-6R-shRNA recombinant adenovirus expression vector was screened by using real-time fluorescence quantitative RT-PCR and Western blot. The IL-6R expressions were 49% and 56% at the levels of mRNA and protein, respectively.CONCLUSION: The IL-6R--shRNA recombinant adenovirus expression vector is successfully constructed and screened.The gene expression of IL-6R can be highly inhibited after acute spinal cord injury.

Fructus psoralea is a tonic traditional Chinese herb commonly used in clinic.The chemical constituents of Fructus psoralea are complicated,mainly containing coumarins,flavonoids and monoterpene phenols with various pharmacological effects.Since the increasing number of reports on the toxicity of Fructus psoralea in clinic,the side effects including toxicity on the liver and kidney,as well as skin allergies have gradually attracted attention.The toxicity of Fructus psoralea is produced from ADME (absorption,distribution,metabolism and excretion) in vivo.In this paper,we collected and clarified the studies of ADME of Fructus psoralea in vivo,and summarized recent adverse clinical events and research over its toxicity.We propose to make a thorough study on the toxic material basis of Fructus psoralea and the toxicological mechanism of its extraction,fractions and compounds.The review provided a possible reference and the direction of research for the safe clinical use of Fructus psoralea.