ObjectiveTo evaluate whether AN69 ST membrane would prolong filter lifetime in continuous renal replacement therapy (CRRT) without anticoagulation in patients with high risk of bleeding.Methods A single-center, prospective, randomized, double-blind control trial with crossover design was conducted. From March 1st to December 31st in 2013, patients who were admitted to Department of Critical Care Medicine of the Fourth Hospital of Hebei Medical University meeting CRRT treatment indications, but could not receive systemic anticoagulation because of high risk of bleeding were studied. The selected patients were randomly divided into two groups according to a random number table, and four filters consisting of two AN69 ST100 membrane filters (A) and two traditional AN69 M100 membrane filters (B) were used for them. GroupⅠ with the filter order of A-B-A-B, and groupⅡ with the order of B-A-B-A. The clinical data of patients was recorded in detail, and conventional AN69 ST and AN69 membrane filter lifetime, their influence on coagulability, and the incidence of bleeding complications were compared.Results Seventeen patients were enrolled, with 10 in groupⅠ, and 7 in groupⅡ. The basic medical characteristics including gender, age, acute physiology and chronic health evaluationⅡ (APAECHⅡ) score, sequential organ failure score (SOFA), Acute Renal Injury Network (AKIN) stage, activated partial thromboplastin time (APTT), prothrombin time (PT), international normalized ratio (INR), platelet count (PLT), and use of mechanical ventilation were not significantly different between two groups. But the use of vasoactive drug was more frequent in groupⅡcompared with that of groupⅠ[100.0% (7/7) vs. 30.0% (3/10),χ2 = 8.330,P = 0.010]. AN69 ST filter lifetime (n =34) was (15.92±2.10) hours, there was no statistically significant difference compared with that of AN69 membrane (t = 0.088,P = 0.942), filter lifetime of which (n = 34) was (16.12±1.38) hours. It was also found by Kaplan-Meier survival analysis that there was no significant difference between the two membrane filter lifetime (χ2=1.589,P =0.208). Logistic regression analysis showed that the life of the first filter was not correlated with coagulation indicators, including APTT, PT, INR, and PLT [APTT: odds ratio (OR) = 0.977, 95% confidence interval (95%CI) = 0.892-1.071, P = 0.623; PT:OR = 1.001, 95%CI = 0.901-1.109,P = 0.988; INR:OR = 1.078, 95%CI = 0.348-3.340,P = 0.896;PLT:OR = 0.996, 95%CI = 0.974-1.019,P = 0.735]. The application rate of vasoactive drugs, which was different between two groups for basic medical indications showed no effect on filter life time (OR = 2.541, 95%CI = 0.239-26.955,P = 0.439). Reasons of clotting in filters were also analyzed, and it was found that blood coagulation in the filter ranked the top (88.2%), and the other reasons were catheter-related problems, death, and unscheduled transport. No difference in blood coagulation function was found in both groups after treatment for 12 hours, and there was no bleeding complication.ConclusionDuring the CRRT without systemic anticoagulant, both surface-treatment with polyethyleneimine AN69 and AN69 ST membrane cannot prolong filter lifetime.

Objective To explore the mechanism of tetramethylpyrazine in the treatment of coronary heart disease (CHD)based on the coexpression-protein interaction network analysis.Methods The tar-gets’information of tetramethylpyrazine was obtained from pharmacophore-based virtual screening and da-tabase searching from STITCH &Chemprot,and the protein-protein interactions of the targets were re-trieved by String database.The protein interaction network was constructed by Cytoscape.Next,the co-expression-protein interaction networks were constructed by integrating gene-expression profile under physiological and disease conditions.The modules of disease associated coexpression-protein interaction network were clustered and functional annotated based on fast agglomerate algorithm based on the edge clustering coefficients (FAG-EC)and gene ontology (GO)enrichment,by which the function modules were mapped to the coexpressin-protein interaction network under the normal physiological state to get the corresponding function modules.Then the function modules under two different conditions were compared and analyzed.Results The effect of tetramethylpyrazine on CHD was achieved by means of regulating and controlling immunological regulation or inflammatory response,cell apoptosis signaling pathway, blood circulation,heme metabolism and basal metabolism;myeloperoxidase (MPO)and hemeoxygenase-1 (HMOX1)probably were two key targets in treatment of CHD.Conclusion The mechanism and the key targets of tetramethylpyrazine in the treatment of CHD were illuminated at the molecular networks lev-el,which could provide reference for clinical practice.

To investigate the effects of induction temperature on the expression product and the impact of urea concentration on the purification, HIV-1 Gag inclusion bodies from E. coli induced at 30 degrees C (IB30) and 37 degrees C (IB37) were dissolved with urea of different concentrations. The solubility and yield of refolding were compared. IB30 were dissolved with 2 mol/L and 8 mol/L urea, and then purified with chromatography. IB30 were found easier to be solubilized in low concentration of urea and easier to be refolded than IB37. Furthermore, compared to the IB30 dissolved in 8 mol/L urea, Gag protein solubilized in 2 mol/L urea was purified to higher purity with gel filtration (GF) and ion exchange (IEX) chromatography. Gag inclusion body induced at lower temperature may contain more protein with native-like or reversibly-denatured structures, and solubilization in the presence of low concentrations of urea can help to retain these structures. This study has provided new insights into the purification of proteins from inclusion bodies.
Escherichia coli ; genetics ; metabolism ; HIV-1 ; genetics ; Humans ; Inclusion Bodies ; metabolism ; Protein Denaturation ; Recombinant Proteins ; biosynthesis ; genetics ; isolation & purification ; Temperature ; Urea ; chemistry ; gag Gene Products, Human Immunodeficiency Virus ; biosynthesis ; genetics

The property theory of Chinese materia medica is one of the foundations of traditional Chinese medicine.The property of Chinese materia medica (PCMM) is a multi-dimensional expression of the effect of Chinese materia medica (CMM),and it is related to the clinical prescription that fully reflects the clinical effect evaluation of CMM in a holistic,systematic,and scientific way.This paper discusses the source,development,and application of the PCMM by considering not only the five dimensions that constitute the PCMM but also the recognition of the human body and disease as given in traditional Chinese medicine.This paper aims to provide theoretical guidance for the rational use and development of CMM.

Objective:The application of Chinese materia medica(CMM)in clinical diseases is the embodiment and continuation of the property theory of CMM(PTCMM).However,due to a lack of precise quantitative description methods,it is difficult to systematically analyze the property of CMM(PCMM)and clinical effect features at the micro molecular level.Methods:The therapeutic drugs and targets were obtained from the Drugbank database.The molecular descriptors of these drugs were calculated based on Dragon software.Drug-effect relationships that integrated the molecular descriptors and effect descriptors were plotted as grayscale images.These images were used to train the LeNet-5 model and the AlexNet model.The best-performing model was used to predict the effect features of the CMM compounds.Finally,the effect features of the PCMM combinations were calculated based on the support vector machine recursive feature elimination algorithm.Results:The AlexNet model showed a superior prediction performance.The results showed that its accuracy,precision,sensitivity,F-measure,and Matthews correlation coefficient on the training set were 0.940,0.936,0.945,0.940,and 0.880,respectively,and those of the test set were 0.909,0.901,0.920,0.910,and 0.819,respectively.A total of 399 compounds in the 42 CMMs for promoting blood circulation and removing blood stasis were predicted by this model.The key effect features of the Han-Ku-Gan combination were anti-inflammatory,anti-tumor,anti-atherosclerosis,anti-Parkinson,hypoglycemic,and anti-coagulant properties,as well as excitation of uterine smooth muscle.The key effect features of the Wen-Xin-Gan combination were anti-inflammatory,anti-atherosclerosis,anti-hypertensive,anti-coagulant,anti-tumor,and anti-cardiac insufficiency effects,as well as enhanced immunity,sedation and hypnosis,and analgesia.Conclusion:This study provides a new method for the further exploration of the relationship between the PCMM and clinical effect features.

HIV Antibodies ; chemistry ; HIV Infections ; diagnosis ; Humans ; Pharmacies ; Pilot Projects ; Reagent Kits, Diagnostic ; Saliva ; chemistry

OBJECTIVETo explore the methods for the therapeutic effect improvement in the treatment of post-stroke urinary retention.

METHODSSixty-three patients of post-stroke urinary retention were randomized into an observation group (32 cases) and a control group (31 cases). The routine clinical medication of neurology and basic rehabilitation were adopted in the two groups. Additionally, in the control group, the intermittent urinary catheterization and bladder function training were applied. The duration and frequency of catheterization were determined by the autonomic urination and residual urine volume every day. In the observation group, on the basis of the treatment as the control group, acupuncture was applied to the twelve-well points in the sequence offlowing among the twelve meridians [Shaoshang (LU 11), Shangyang (LI 1), Lidui (ST 45), Yinbai (SP 1), Shaochong (HT 9), Shaoze (SI 1), Zhiyin (BL 67), Yongquan (KI 1), Zhongchong (PC 9), Guanchong (TE 1), Zuqiaoyin (GB 44) and Dadun (LR 1)]. Acupuncture was given once a day, 20 treatments were required. In 20 treatments, the clinical therapeutic effects and the residual urine volume were observed.

RESULTSThe total effective rate was 90.6% (29/32) in the observation group, better than 67.7% (21/31) in the control group (<0.01)). After treatment, the residue urine volume was all reduced apparently in the patients of the two groups (both<0.01). The result of the residue urine volume in the observation group was lower apparently than that in the control group (<0.01).

CONCLUSIONAcupuncture at the-well points in the sequence offlowing among meridians combined with bladder function training achieve the apparent therapeutic effects on post-stroke urinary retention. The results are better than those achieved by the routine western medicine with bladder function training involved.