Objective To detect the expression of tenascin-C(TN-C)and tenascin-X(TN-X)in the embryonic heart of rats,investigate their role during the heart development.Methods Sixty-four Spraque-Dawley female rats and 20 male rats were put into the same cage,when vaginal suppository was found,the femate was pregnant 0.5 day(ED 0.5),then executed the pregnant rats on ED 12.5,ED 15.5 and ED 19.5,got out the hearts.Semi-quantitative reverse transcriptase-polymerase chain reaction(RT-PCR)was used to detect the TN-C and TN-X mRNA expression in the rat hearts aged embryonic day 12.5(ED 12.5),ED 15.5 and ED 19.5.The protein expression of TN-C and TN-X in the embryonic hearts was detected by immunohistochemistry.Results TN-C mRNA was highly expressed in ED 12.5 embryonic hearts(0.683 7?0.043 1),the expression of TN-C mRNA of ED 15.5(0.454 3?0.038 8)and ED 19.5(0.250 5?0.038 4)embryonic hearts decreased,they were different from the expression of ED 12.5(Pa

Sodium houttuyfonate (SH) is a derivative of effective component of a Chinese material medica, Houttuynia cordata, which is applied in anti-infection of microorganism. But, the antimicrobial mechanisms of SH still remain unclear. Here, we firstly discovered that SH effectively inhibits the three types of virulence related motility of.Pseudomonas aeruginosa, i.e., swimming, twitching and swarming. The plate assay results showed that the inhibitory action of SH against swimming and twitching in 24 h and swarming in 48 h is dose-dependent; and bacteria nearly lost all of the motile activities under the concentration of 1 x minimum inhibitory concentration (MIC) (512 mg x L(-1) same as azithromycin positive group (1 x MIC, 16 mg x L(-1)). Furthermore, we found that the expression of structural gene flgB and pilG is down-regulated by SH, which implies that inhibitory mechanism of SH against motility of P. aeruginosa may be due to the inhibition of flagella and pili bioformation of P. aeruginosa by SR Therefore, our presented results firstly demonstrate that SH effectively inhibits the motility activities of P. aeruginosa, and suggest that SH could be a promising antipseudomonas agents in clinic.
Alkanes ; pharmacology ; Anti-Bacterial Agents ; pharmacology ; Bacterial Proteins ; genetics ; metabolism ; Biofilms ; drug effects ; Drugs, Chinese Herbal ; pharmacology ; Fimbriae, Bacterial ; drug effects ; genetics ; metabolism ; Houttuynia ; chemistry ; Pseudomonas aeruginosa ; cytology ; drug effects ; genetics ; pathogenicity ; Sulfites ; pharmacology ; Virulence ; drug effects

Chinese materia medica resource (CMM resource) is the foundation of the development of traditional Chinese medicine. In the study of sustainable utilization of CMM resource, adopting innovative theory and method to find new CMM resource is one of hotspots and always highlighted. Pharmacophylogeny interrogates the phylogenetic relationship of medicinal organisms (especially medicinal plants), as well as the intrinsic correlation of morphological taxonomy, molecular phylogeny, chemical constituents, and therapeutic efficacy (ethnopharmacology and pharmacological activity). This new discipline may have the power to change the way we utilize medicinal plant resources and develop plant-based drugs. Phylogenomics is the crossing of evolutionary biology and genomics, in which genome data are utilized for evolutionary reconstructions. Phylogenomics can be integrated into the flow chart of drug discovery and development, and extends the field of pharmacophylogeny at the omic level, thus the concept of pharmacophylogenomics could be redefined in the context of plant pharmaceutical resources. This contribution gives a brief discourse of knowledge pedigree of pharmacophylogeny, epistemology and paradigm shift, highlighting the theoretical and practical values of pharmacophylogenomics. Many medicinally important tribes and genera, such as Clematis, Pulsatilla, Anemone, Cimicifugeae, Nigella, Delphinieae, Adonideae, Aquilegia, Thalictrum, and Coptis, belong to Ranunculaceae family. Compared to other plant families, Ranunculaceae has the most species that are recorded in China Pharmacopoeia (CP) 2010. However, many Ranunculaceae species, e. g., those that are closely related to CP species, as well as those endemic to China, have not been investigated in depth, and their phylogenetic relationship and potential in medicinal use remain elusive. As such, it is proposed to select Ranunculaceae to exemplify the utility of pharmacophylogenomics and to elaborate the new concept empirically. It is argued that phylogenetic and evolutionary relationship of medicinally important tribes and genera within Ranunculaceae could be elucidated at the genomic, transcriptomic, and metabolomic levels, from which the intrinsic correlation between medicinal plant genotype and metabolic phenotype, and between genetic diversity and chemodivesity of closely related taxa, could be revealed. This proof-of-concept study regards pharmacophylogenomics as the updated version of pharmacophylogeny and would enrich the intension and spread the extension of pharmacophylogeny. The interdisciplinary knowledge and techniques will be integrated in the proposed study to promote development of CMM resource discipline and to boost sustainable development of Chinese medicinal plant resources.
China ; Drugs, Chinese Herbal ; chemistry ; pharmacology ; Knowledge ; Medicine, Chinese Traditional ; Phylogeny ; Plants, Medicinal ; chemistry ; classification ; genetics

BACKGROUND:Intertrochanteric fracture showed shattered state of different degrees in the clinic. The medial cortex is often a lack of continuity. Indentation and lesser trochanter displacement often cause destruction of biomechanics of femoral calcar to different degrees. Under this condition, it is very important to perform detailed classification of fractures and to strictly master indication of dynamic hip screw. OBJECTIVE:To further analyze the reasons for failure of internal fixation with dynamic hip screw for intertrochanteric fracture. METHODS:Data of 82 patients with intertrochanteric fracture repaired by internal fixation with dynamic hip screw, who were treated at the Department of Orthopedics, Kangtai Branch of the Second Hospital of Lanzhou University from March 2004 to December 2013, were retrospectively analyzed. The reason for failure of internal fixation and prevention method were explored. RESULTS AND CONCLUSION:Al patients were fol owed up for 4-48 months. Time of fracture healing was 12-38 weeks. Fixation failure was found in 12 cases, with an incidence of 15%. Of 12 failure cases, 7 cases affected hip screw cutting out femoral head neck (including 1 case combined with avascular necrosis of the femoral head), 1 case suffered from compression screw slipping out of the tube, 3 cases experienced screw pul ing out and breaking, plate loosening, and 1 case affected steel plate breakage. There were 1 case of Evans II type (8%), 3 cases of type III (25%), 5 cases of type IV (42%), and 3 cases of type V (25%). Lesser trochanter was not completely reset in 5 cases (42%). There were tip-apex distance>25 mm in 7 cases (58%) and early weight loading (3 weeks after fixation) in 1 case (8%). These data confirmed that the selection of indications, the degree of stability after reduction, accuracy of implant position and postoperative unreasonable exercise wil cause fixation failure of dynamic hip screw. Preoperative careful and comprehensive analysis, intraoperative precise operation and postoperative reasonable functional exercise are the keys to ensure success of fixation.

BACKGROUND:Pedicle screw is the major instrumentation of surgery in thoracic spine. However, there have been few reports about pedicle morphology relevant to screw insertion tracts, and few reports comparing the normal adolescents and adolescent idiopathic scoliosis patients. OBJECTIVE:To compare the morphologic characteristics of the thoracic pedicle with regard to safe thoracic pedicle screw placement in normal adolescents and adolescent idiopathic scoliosis patients. METHODS: Thoracic pedicles of thirty-five normal adolescents and thirty-five adolescent idiopathic scoliosis patients were measured with three-dimensional reconstruction CT images. Measured parameters include (1) critical distance: the shortest distance from an entry point to the ventral cortex of the lamina. (2) Safe distance: the distance from the entry point to the tangent of the spinal canal at the medial wal of the pedicle. (3) Pedicle screw length. (4) Pedicle width. (5) Pedicle transverse angle. The dangerous area was defined as the distance between the critical distance and the safe distance. RESULTS AND CONCLUSION: The mean critical distance was (9.2±1.0) mm for the normal adolescents, and (9.4±1.2) mm for the adolescent idiopathic scoliosis patients. Safe distances were significantly less in normal adolescents (14.7±0.8) mm than that of the adolescent idiopathic scoliosis group (15.4±1.4) mm (P < 0.001). The dangerous area was (5.4±0.7) mm for the normal adolescents, which was significantly less than that of the adolescent idiopathic scoliosis patients (6.0±1.0) mm (P < 0.001). Pedicle screw length was (36.6±4.1) mm for the normal adolescents and (37.1±5.3) mm for the adolescent idiopathic scoliosis patients. Pedicle width was (5.8±1.2) mm for the normal adolescents and (5.7±1.7) mm for the adolescent idiopathic scoliosis patients. No significant difference in critical distance, pedicle screw length and pedicle width was found between the two groups (P=0.382, 0.135, 0.293). Pedicle transverse angle decreased gradualy from T1 to T12 in both groups. These results verify that pedicle morphology of many parameters is different between normal adolescents and adolescent idiopathic scoliosis patients, especialy in the apical area of the thoracic curve.

Objective To observe the dynamic serological test results of 28 patients with acute brucellosis,and to investigate the relationship between serological test results and diagnosis,curative effect and prognosis of brucellosis.Methods Twenty eight patients(infected with sheep brucellosis) with acute brucellosis in the Department of Brucellosis in Heilongjiang Provincial Land Reclamation Headquarters General Hospital were selected as research subjects,and their serological changes were tested by means of tube agglutination test (SAT)and clinical outcomes were compared before and after each stage of treatment.In addition,symptoms of fever,weakness,sweating,joint pain,swollen lymph nodes and biochemical parameters [alanine aminotransferase (ALT),lactate dehydrogenase (LDH)] were also tested 3,6 and 9 weeks after the treatment.Results Antibody titer reached the peak at the third week,1 ∶ 400(++),which accounted for 39.29％ (11/28); 2857％(8/28) of the patients became negative at the sixth week; 50.00％ (14/28) became negative at the ninth week.Before the treatment,20(71.43％) patients had the symptom of fever,8 (28.57％) patients had the symptom of hyperhidrosis,28 (100.00％) patients had the symptom of joint pain,7(25.00％) patients had the symptom of lymph node enlargement,28 (100.00％) patients' ALT was elevated,and 26(92.86％) patients' LDH was elevated.After three weeks of treatment,except the three patients (10.71％) who occasionally had fever,the rest of the patient's temperature was returned to normal.Also the numbers of patients with the symptoms of fatigue,sweating and joint pain were significantly reduced,and specifically,the conesponding number was 13(46.43％),2(7.14％),and 21 (75.00％)patients,respectively.ALT and LDH returned to normal(only one patient's ALT was out of the range).At the sixth week,all the patients' symptoms of fever and hyperhidrosis disappeared.The number of patients with the symptoms of joint pain and lymph node enlargement reduced to 12(42.86％) and 3(10.71％),respectively.The results of biochemical tests(ALT and LDT) returned to normal.At the ninth week,most patients' clinical symptoms disappeared.A few patients still had the symptoms of weakness[2(7.14％)] and joint piin[6(21.43％)].Conclusions After effective treatment,antibody titer of patients decreases rapidly,at the same time,the clinical symptoms improve quickly.There is a parallel relationship between the change of antibody titer and clinical symptoms.It is demonstrated that the appearing time of brucellosis specific antibodies,the ampfitude and speed of change of antibody titers can be used in diagnosis,therapeutic evaluation and prognosis of the disease.

Objective To observe the clinical features of brucellosis spondylitis and analyse the reasons for its misdiagnosis,and improve the level of diagnosis and differential diagnosis.Methods Forty-two clinically diagnosed patients with brucellosis spondylitis were studied retrospectively,and these patients were diagnosed and hospitalized in the General Hospital of Heilongjiang Land Reclamation Bureau.Their medical records were analyzed,which included the general information,medical history,clinical symptoms,results of magnetic resonance imaging(MRI) and serum tube agglutination test(SAT) and so on.Results Main clinical symptoms and signs were severe persistent neck,back and leg pain.They also had plate shape low back but without kyphosis.In addition,patients had to keep in one posture because their spinal activity was limited.Also,scoliosis or pelvic tilt and lameness may occur when standing,which were typical symptoms of nerve root compression.Thirteen cases were diagnosed as tuberculosis,accounting for 30.95％(13/42); 6 cases were diagnosed as lumbar disc herniation,accounting for 14.28％ (6/42); 2 cases were diagnosed as ankylosing spondylitis,accounting for 4.76％ (2/42).Therefore,the total rate of misdiagnosis was 50％ (21/42).Abnormal MRI signal intensity can be seen in the pathological vertebrae.Specifically,T1-weighted images (T1WI) showed low signal,T2-weighted images (T2WI) showed high signal,or mixed high and low signal intensity was observed.Vertebral showed wedge deformation without collapse and sequestrum; strip and sheet abnormal signal can also be found within the intervertebral disc.Normal structure disappeared and disc space became narrow.Accordingly,the plane dural sac was compressed to form visible abscess near the spine,but psoas abscess was not found.Patients with positive SAT result accounted for 92.85％ (39/42).Conclusion Reasons for misdiagnosis include lack of detailed medical records,atypical clinical symptoms and similar imaging changes and so on.

ObjectiveTo prepare a novel etimicin-encapsuled chitosan/hydroxyapatite nano-scaffolds and offer assistances for bone defect or osteomylitis.MethodsDrug-carried chitosan nanoparticles which was prepared by ionotropic gelation were combined with nano-hydroxyapatite.The mixture were shaped in molds and then prepared into porous scaffolds by freeze-dry.The surface of one scaffold was scanned.The grinded,particles of the scaffold were detected by field emission scanning electron microscope; X-ray diffraction was used to analyze components of the scaffold and total porosity.Staphylococcus aureus was choosed as the experimental bacteria,we studied lasting antibacterial property of drug-carried bone scaffold by antibacterial experiments,long-term drug releasing experiments and accumulation drug releasing experiments.Bone mesenchymal stem cells were used to detect the histocompatibility and inductivity of etimicin-carried scaffold.ResultsFreeze-dried porous scaffold has a surface with proper pore distribution (total porosity 70.68％) and the grinded scaffold has a globular and coliformed microstructure known after scanned by electron microscope.The drug-carried scaffold has a typical wave of hydroxyapatite under X-ray diffraction.The lasting antibacterial property study indicated that the drug-carried bone scaffold had maintained an inhibition zone for more than 7 days.The long-term drug releasing experiments and accumulation drug releasing experiments show that the fictional drug-carried bone scaffold released above the bacteriostasis concentration after one week and the accumulative amount within the safety scale.The scaffold had not an inhibitory effect on bone mesenchymal stem cells.ConclusionThe etimicin-encapsuled chitosar/ hydroxyapatite nano-scaffolds has similar microstructure and components of bone tissue.It is promising in bone tissue engineering applications because of its slow-release,antibacterial properties and satisfactory histocompatibility.

Objective To investigate the role of acid and bile reflux in children with gastroesophageal reflux disease (GERD) and to evaluate the significance of detecting acid and bile reflux in diagnosing GERD in children.Methods Using ambulatory 24 h pH mo-(nitoring) and bilirubin monitoring technique, we simultaneously assessed the changes of intraesophageal pH and bile reflux in 23 subjects (including 11 healthy controls and 12 patients with GERD).Results The time of esophageal acid exposure (pH

Nerve growth factor is one of the most important factors playing an important role in regulating the growth, development and survival of the neuron. The purified NGF from human placenta has been reported, the tissue from which can be isolated the NGF is very limited. It is important for basic research and clinic application to expression hNGF by genetic engineering. By polymerase chain reaction,gene fragment encoding the mature part of ?-NGF was amplified using the DNA of human placenta as template. The fragment was sequenced and inserted into expression vector pET-15b, and the recombinant expression vector pET15b-NGF was transformed into E.coli BL21(DE3)pLysS. After inducing with IPTG the NGF was higher expressed up to 25% of the total cell proteins. The expression product was purified with metal chelate affinity chromatography on Ni-IDA agarose under denaturing condition. The purity of rNGF was higher than 90% and yield of rNGF was 4.56mg/L expressing bacteria. SDS-PAGE revealed the NGF expression product had a Mr 16kDa. Western-blot displayed the recombinant product had strong immunological activity with rabbit anti-human ?-NGF polyclonic antibodies. The expression products were dealed with solubilizing inclusion bodies and refolding protein. The test of nerve fiber growth of chicken embryo DRG neurons displayed rNGF had biological activity.