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Enzymes are widely used in chemical and pharmaceutical industries because of their advantages of high efficiency and specificity. However， the shortcomings of the free enzymes， such as poor stability and difficulty in recycling， limit their application. Therefore， the immobilization and application of enzymes have become one of the research hotspots. The selection of the immobilization carriers is a critical step in the process of enzyme immobilization. Metal-organic frameworks（MOFs）， a kind of porous materials， are formed by the coordination of metal ions or metal clusters with organic ligands. As an emerging immobilization carrier， its advantages such as high porosity， strong stability， and surface modifiability make it ideal for immobilized enzyme carriers. By immobilizing the free enzyme on MOFs， the above mentioned deficiencies of the free enzymes can be effectively solved， which greatly broaden the applicable condition. Ligand fishing is a method to find receptor-specific ligands from complex components， which has the advantages of high efficiency， simple sample pretreatment and high specificity. The MOF-enzyme complex formed by enzyme immobilization can act as a "fishing rod" for ligand fishing， which can screen out the targets from the complex system of components. The complex chemical composition and various active ingredients of traditional Chinese medicine（TCM） make the ligand fishing technology to play a big role in the screening of enzyme inhibitors from TCM. And the screened enzyme inhibitors are expected to be further developed into the lead compounds with good efficacy and low adverse effects， so the immobilized enzymes of MOFs have a wide application in the screening of active ingredients from TCM. Based on this， this paper summarized the methods of immobilized enzymes of MOFs in recent years， analyzed the characteristics， advantages and disadvantages of each method， and summarized the laws of preparation conditions and mechanisms. Meanwhile， the application and future development of immobilized enzymes of MOFs in the field of enzyme inhibitor screening from TCM were also summarized and prospected， with a view to providing a reference for the development of natural ingredients and the modernization of TCM.
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The dysfunction of coronary microcirculation is an important cause of coronary artery disease (CAD). The index of microcirculatory resistance (IMR) is a quantitative evaluation of coronary microcirculatory function, which provides a significant reference for the prediction, diagnosis, treatment, and prognosis of CAD. IMR also plays a key role in investigating the interaction between epicardial and microcirculatory dysfunctions, and is closely associated with coronary hemodynamic parameters such as flow rate, distal coronary pressure, and aortic pressure, which have been widely applied in computational studies of CAD. However, there is currently a lack of consensus across studies on the normal and pathological ranges of IMR. The relationships between IMR and coronary hemodynamic parameters have not been accurately quantified, which limits the application of IMR in computational CAD studies. In this paper, we discuss the research gaps between IMR and its potential applications in the computational simulation of CAD. Computational simulation based on the combination of IMR and other hemodynamic parameters is a promising technology to improve the diagnosis and guide clinical trials of CAD.
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Humanos , Angiografia Coronária , Doença da Artéria Coronariana , Circulação Coronária , Microcirculação , Valor Preditivo dos Testes , Resistência VascularRESUMO
The postoperative pathological staging system (pTNM) has become an important reference for the selection of various tumor treatment strategies and prognosis evaluation at a global scale, and is a powerful predictor of the prognosis of a variety of solid tumors, but the prognosis is still different in patients with the same pTNM staging. In recent years, studies have confirmed that the negative lymph nodes count (NLNC) is related to the prognosis of a variety of solid tumors. Higher NLNC can improve the prognosis of cancer patients, and NLNC can reduce staging migration, which is expected to be a supplement to the pTNM staging system. This article reviews the value of NLNC in the prognosis of solid tumors.
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Objective:To explore the performance of the commonly used whole blood C-reactive protein (CRP) detection systems and give related recommendation on the performance requirements of detection systems.Methods:A total of 7 540 venous blood samples from 26 maternal, child and children′s hospitals were collected to conduct this multi-center study on the analytical performance of 5 commonly used whole blood CRP detection systems from March to April in 2019. The blank check, carryover, repeatability, intermediate precision, linearity, sample stability, influence of hematocrit/triglyceride/bilirubin, comparison with SIEMENS specific protein analyzer and trueness were evaluated. The 5 systems included BC-5390CRP autohematology analyzer, AstepPLUS specific protein analyzer, Ottoman-1000 Automated Specific Protein POCT Workstation, i-CHROMA Immunofluorometer equipment Reader and Orion QuikRead go detecting instrument. The 5 systems were labeled as a, b, c, d and e randomly.Results:Within the 5 systems, all values of blank check were less than 1.00 mg/L, the carryovers were lower than 1.00%. The repeatability of different ranges of CRP concentrations including 3.00-10.00, 10.00-30.00 and>30.00 mg/L were less than 10.00%, 6.00% and 5.00%, respectively, and the intermediate precision was less than 10.00%. The linearity correlation coefficients of the 5 systems were all above 0.975, while the slope was within 0.950-1.050. Whole blood samples were stable within 72 hours both at room temperature (18-25 ℃) and refrigerated temperature (2-8 ℃). The CRP results were rarely influenced by high triglyceride or bilirubin, except for the immmunoturbidimetric test based on microparticles coated with anti-human CRP F(ab) 2 fragments. When triglyceride was less than 15.46 mmol/L, the deviation of CRP was less than 10.00%. When bilirubin was less than 345.47 μmol/L, the deviation of CRP was less than 10.00%. CRP was more susceptible to Hct on the systems without Hct correction. The deviation of CRP between different Hct dilution concentration and 40% dilution concentration can reach as high as 67.48%. The correlation coefficients ( r) of 5 systems were all more than 0.975 in the range of 0-300.00 mg/L compared with Siemens specific protein analyzer. All systems passed the trueness verification using the samples with specified values of 12.89 and 30.60 mg/L. Conclusion:The performance of 5 systems can basically meet the clinical needs, but it is suggested that the whole blood CRP detection system without automatic Hct correction should be modified manually.
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Noonan syndrome is a genetic multisystem disorder characterised by distinctive facial features, congenital heart disease, short stature, developmental delay, and bleeding diculties. This paper reports a rare Noonan syndrome child who presented chiefly to our institution with severe blepharophimosis. After DAN whole exome sequencing analysis, the patient was diagnosed with the PTPN11 gene c. 1517C> T mutation.
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The significant progress in cosmetic epicanthoplasty from 1959 to 2019 was reviewed in this article. The causes and pathogenesis of congenital epicanthus, the classification and grading of various epicanthus, the development and evolution of epicanthoplasty method were summarized emphatically. Meanwhile, the author presents his predictions for the future development and some related issues in this field.
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Objective: To explore the mechanism of Yinao Jieyu Compound Formula in the treatment of post-stroke stressrats from the perspective of intestinal flora changes. Methods: A total of 48 male clean SD rats were randomly divided into4 groups: sham-operation group, post-stroke stress group, western medicine group and traditional Chinese medicinegroup, with 12 rats in each group. In the sham-operation group, only the free blood vessels were not inserted into thethread embolus. The rats in post-stroke stress group, the western medicine group and the Chinese medicine group weretreated as follows: after 1 week of middle cerebral artery occlusion, the rat model of PSD was prepared by using chronicrestraint stress and single cage feeding. The 7 th day from the beginning of the construction of the cerebral stroke model, the gavage treatment began to be done. The western medicine group was given Fluoxetine Hydrochloride Capsules2.33 mg/ (kg.d), and the Chinese medicine group was given 9.92 g/ (kg·D) . The rest of the rats were gavage with 10 mL/kgdistilled water, 1 time/day. The behavioral changes on the 14 th day after post-stroke were observed and the microbialcommunity structure and composition was analyzed by Illumina-MiSeq high throughput sequencing technique. Results:Compared with the sham operation group, the sucrose water preference, open field score and swimming struggle time ofthe post-stroke stress group were significantly decreased (P ＜ 0.01, P ＜ 0.01, P ＜ 0.01), and the proportions ofAllobaculum, Sutterella, Dorea and rc4-4 in the feces decreased significantly (P ＜ 0.01, P ＜ 0.01, P ＜ 0.01, P ＜ 0.05) .The proportion of Oscillospira increased significantly (P ＜ 0.01, P ＜ 0.05, P ＜ 0.01) . Compared with the post-strokestress group, the horizontal scores and swimming struggling time of the rats in the Chinese medicine group weresignificantly increased (P ＜ 0.05, P ＜ 0.05), and the proportions of the 6 species of Lactobacillus and Bacteroides weresignificantly increased in the feces. The difference between Lactobacillus and Bacteroides was the most obvious with27.91％ vs 5.96％ and 24.21％ vs 9.62％ (P ＜ 0.01, P ＜ 0.01) . The proportion of Oscillospira was significantly decreased (P ＜ 0.05) . Compared with the western medicine group, there was no significant difference in the behavioral scores of therats in the traditional Chinese medicine group (P＞ 0.05), and the proportion of Bacteroides and rc4-4 in the feces wassignificantly increased (P ＜ 0.01, P ＜ 0.05) . Conclusion: Yinao Jieyu Compound Formula can alleviate similar depressivesymptoms in post-stroke stress rats by increasing the content of Lactobacillus and Bacteroides in the intestine of rats.
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Objective@#To evaluate the therapeutic effect of choosing different surgical incisions in eyebrow lifting.@*Methods@#This research recruited 87 female who underwent eyebrow lifting in our hospital from January 2015 to December 2017, with the mean age of 52.4 years ranging from 25 to 71 years. According to the degree of the upper eyelid soft tissue laxity the level of eyebrow drooping and cosmetic patients personal requirements, we performed different surgical incisions respectively. Therefore, there were 39 cases upper-eyebrow incision, 31 cases under-eyebrow incision and 17 cases combined with upper and lower eyebrow incision.@*Results@#87 women who had undergone the 3 months to 4 years follow-up (average period, 6.3-month), are pleased with their eyebrow and rejuvenation after eyebrow lifting, with 90.8% (79 of 87) satisfaction, 6.9% (6 of 87) satisfaction basically and 2.3% (2 of 87) dissatisfaction. And only 2 patients had secondary surgery for unacceptable brow shape.@*Conclusions@#By choosing different eyebrow incisions and removing skin around the eyebrow, there were efficient ways to rectify the upper eyelid skin relaxation and eyebrow drooping, widen the double eyelid line as well as to improve crow′s-feet. We firmly believe that it is essential for surgeons to sufficiently get to know patients′ requirements and design a personalized treatment scheme according to the relaxation degree of the upper eyelid soft tissue and the shape of eye-brow.
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A 43-year-old female presented with multiple, painful, erythematous papules and nodules on the dorsal of the body over the past 17 years. The tumor was painful after cold stimulus and the significant symptoms improved for recent 3 years. Histopathological examinations confirmed the clinical diagnosis of cutaneous leiomyomas. A surgical procedure was one of the therapeutic options in the case of multiple and painful leiomyomas.
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Objective To investigate the applicability of autoregressive integrated moving average (ARIMA) model in predicting healthcare-associated infection(HAI) in children.Methods The ARIMA model was constructed according to the incidence of HAI in a hospital from January 2011 to December 2014.With the use of information criterion,optimal model was determined;HAI data in 2015 was as test samples,the feasibility of the model was evaluated.Results ARIMA (0,1,1) was the optimal prediction model for HAI rate,the Akaike Information Criterion (AIC) and Bayesian Information Criterion(BIC) of the ARIMA (0,1,1) were 66.61 and 70.76,respectively.The Ljung-Box statistics value Q =14.14 was not significantly different (P =0.658),suggesting a white noise sequence of residuals with a good model fitting.The mean absolute percent error(MAPE) between actual and fitting value of HAI was 22.4,the actual values were within the 95％ confidence interval.Conclusion ARIMA model fits the time series data,and can achieve satisfactory effect on predicting the incidence of HAI in hospitalized children.
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Objective To investigate the clinical effect of PKP combined with anti osteoporosis drugs in the treatment of osteoporotic vertebral compression fractures.Methods 100 cases of osteoporotic vertebral compression fractures treated in our hospital from January 2014 to December 2016 were compression fracture as the research object in the course of the study, and were randomly divided into control group and experimental group,with 50 cases in each group.Patients in the control group were treated with PKP, while the experimental group was treated with PKP combined with anti osteoporosis drugs.The related clinical indicators of the two groups were compared and analyzed.Results After the corresponding treatment, there was no significant difference between the experimental group and the control group in the rate of cement leakage and the amount of bone cement injection.After operation, the ODI index and VAS scoreof the two groups were significantly better than before treatment, the difference was statistically significant(P<0.05), the patient's cone height was well recovered.After 14 to 24 months of follow-up found that, the fracture rate of the experimental group was 10.0%, significantly lower than the control group 24.0%, the difference was statistically significant(P<0.05).Conclusion PKP combined with anti osteoporosis drugs for the treatment of osteoporotic vertebral compression fractures has good clinical effect, can effectively reduce the adjacent segment cone fracture rate, improve the quality of life of patients, with further clinical promotion and application significance.
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Objective To investigate the effect of ganoderic acid A( GA-A) on apoptosis, invasion and KDR expression of human U251 cells.Methods Ganoderic acid A( GA-A) was prepared, human U251 cells were treated with 0.1, and 0.5 mmol/L GA-A, and the experiment was divided into blank control, low concentration and high concentration group.The expressions of KDR mRNA and KDR protein was assayed by RT-PCR and Western blot.The effect of GA-A on the proliferation and invasion capability of U251 cells was determined by CCK-8 and transwell assay in vitro, respectively.Flow cytometry was used to detect the influence of GA-A on the cell cycle and apoptosis of U251 cells, and TUNEL staining was detected the cell apoptosis too.Results Compared with the control group, KDR mRNA and protein expression of high concentration and low concentration group were significantly decreased(P <0.05), GA-A can significantly reduce the cell growth rate, reduce the proportion of cells in G1 phase and increase the proportion of S phase and G2 /M phase,cells apoptosis was significantly increased in the high concentration and low concentration group ( P <0.01), and cells proliferation and invasion was significantly decreased (P <0.05).Compared with low concentration group, the high concentration group induce cell apoptosis and inhibit the expression of KDR more significant (P <0.05). Conclusions Ganoderma acid A can induce apoptosis in U251 cells, inhibit proliferation and invasion, and can inhibit the expression of KDR mRNA and protein, which may be one of the mechanisms of anti-tumor.
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BACKGROUND:It has been demonstrated that there are different expressions of fatty acid binding proteins (FABPs) in most malignant tumors such as breast cancer, prostate cancer, liver cancer, lung carcinoma and bladder carcinoma;therefore, FABPs are closely related to the occurrence, metastasis, invasion and drug resistance of malignant tumors. OBJECTIVE:To investigate the effects of fatty acid binding protein-5 (FABP-5) silencing on the proliferation, invasion and apoptosis of U251 cel s (human glioma cel s). METHODS:siRNA molecules targeting the mRNA of FABP-5 was designed and chenical y synthesized, which was transiently transfected into U251 cel s. U251 cel s were divided into three groups:Lv-shRNA-FABP-5 was added into FABP-5-shRNA group, LV-shRNA-NC added into negative control group, and blank control group underwent normal culture. mRNA and protein expressions of FABP-5 were detected by RT-PCR and western blot assay, respectively. The cel proliferation in vitro was determined by cel counting kit-8 assay, the cel cycle, apoptosis and expressions of CD44+and CD133+were detected by flow cytometry, and the apoptosis was observed using TUNEL staining. RESULTS AND COUNCLUSION:mRNA and protein expressions of FABP-5 in the FABP-5-shRNA group were significantly lower than those in the negative control and blank control groups. Compared with the negative control and blank control groups, the cel growth rate was significantly decreased, the cel cycle arrested in the G0/G1 phase, and the cel number in the S phase was decreased, and moreover, the proportion of CD44+/CD133+expression was significantly decreased in the FABP-5-shRNA group (P<0.05). Besides, compared with the negative control and blank control groups, the apoptosis rate was significantly increased, and the cel proliferation and invasiveness were significantly decreased in the FABP-5-shRNA group (P<0.05). In conclusion, it is possible that FABP-5 directly or indirectly regulates the cel cycle and apoptosis of glioma cel s, and its expression changes share a close relationship with the invasiveness of tumor cel s.
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Objective To study the clinical effect of microsurgical surgery for the treatment of intracranial aneurysms in the acute phase. Methods 88 patients with intracranial aneurysm who were treated with the microscopic surgery in our hospital were selected as the research object. The prognosis was evaluated by Glasgow scale ( GOS) ,and the mortality rate during the follow-up period and postoperative complications were observed. Results All the patients received surgery success. The operation time was (60. 5 ± 20. 3) min,and the intraop-erative blood loss was (45. 2 ± 21. 5) mL. 12 months after operation,according to the GOS score of daily living ability,42 patients were of good prognosis and the other 46 cases were of poor prognosis. The good prognosis rate was 47. 7% and it is significantly higher than that of 3 months and 6 months after surgery. The difference was statistically significant (P<0. 05). There were 4 cases died among the 88 patients with a mortality of 4. 5%. Conclusion Using microsurgical treatment to treat intracranial aneurysms can receive good prognosis and low mortality rate. Complications were significantly improved after symptomatic treatment.
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AimTo find out the comprehensive strength and trends in scientific research area,and to provide foundation for decision-making on pushing the paediatric research forward,we reviewed the achievements of the scientific papers publication and the professional background of the authors between 2001 and 2010. Methods We extracted data and described the distribution characteristics of the paper publication amount,degree in the 10 years,as well as age,construction of professional and technical title,the education qualification of the authors. Moreover,we statistically analyzed the variability of the publication conditions within statistical source journals among the authors with different technical title.ResultsThe amount of paper publication increased anually in the 10 years,but with few published in statistical source journals,and the core authors group have not formed yet.Meanwhile,the general internal medicine maintained the dominant propotion.Authors aged 30 -50 years old,with middle technical title and with bachelor degree published the majority of the papers.The propotion of the papers published in statistical source journals and in the Zhonghua series medical journals were significantly higher in authors with master degree and above.ConclusionsIn order to construct a stable core authors group and increase the amount of the paper publication,we should continue to encourage those author groups with high output rate and make greater support on the potential authors.Furthermore,we must take more effort on impoving publication quality in the future.
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@#ObjectiveTo observe the effect of early rehabilitation on motor function, high-sensitivity C-reactive protein (hs-CRP), interleukin-1（IL-1） and interleukin-6（IL-6） in patients with acute cerebral infarction (ACI). Methods160 patients with ACI were randomly divided into rehabilitation group (n=80) and control group (n=80), who accepted early rehabilitation and routine medicine or medicine only, respectively. They were assessed with modified Edinburgh-Scandinavian Stroke Scale (MESSS) and their peripheral level of hs-CRP, IL-1 and IL-6 were detected before and 1, 2, 4, and 8 weeks after treatment. Results4 and 8 weeks after treatment, the level of hs-CRP, IL-1 and IL-6 were lower in rehabilitation group than in control group（P＜0.05）, as well as the scores of the MESSS （P＜0.01）. The incidence of improvement is more in rehabilitation group than in control group（P＜0.05）. ConclusionEarly rehabilitation can reduce the expression of hs-CRP, IL-1 and IL-6, and improve the neurological function in patients with ACI.
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Objective To explore the role of EphB4 in proliferation of glioma cells. Methods The mRNA and protein expressions of EphB4 were detected using RT-PCR, immunochemistry, and Western-blot, respectively. EphB4 siRNA was synthesized and transfected into U251 cells using Lipofectamine 2000. Glioma cell proliferation, apoptosis, and invasion were determined by MTT assay, TUNEL and transwell experiment, respectively. Results The expression (P<0.05) and proliferation of EphB4 were obviously decreased in U251 transfected with EphB4 siRNA and the proliferation was further decreased with the increased concetrations of siRNA. Compared with U251 group and siRNASCR group, EphB4 siRNA at different concentrations (25, 50 or 100 nmol/L) significantly reduced the invasion ability of cells and increased the number of apoptotic cells (P<0.05). Conclusions EphB4 plays an important role in the regulation of glioma cell proliferation, apoptosis and invasion.
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Objective To investigate the efficacy of tolterodine plus tamsulosin in rats with benign prostatic hyperplasia(BPH)induced low urinary tract syndrome(LUTS).Methods Male rats were castrated,then testosterone propionate were given by subcutaneous injection to induce BPH/LUTS model.Model rats were intragastrically administrated with 0.4mg/kg of tolterodine,0.04mg/kg of tamsulosin or(0.4+0.04)mg/kg of tolterodine plus tamsulosin for 14 days and urodynamics,residual urine volume and volume of bladder were mearsured.Results Tolterodine plus tamsulosin could simultaneously shorten the micturition duration,prolong the interval duration between micturition,decrease the threshold intravesical pressure at micturition and the max intravesical Pressure at micturition significantly.The combined-therapy method could also decrease the residual urine volume to a certein extent and had no obvious influence on enlarging the volume of bladder(P＜0.05 or P＜0.01).Conclusion Combination treatment with tolterodine and tamsulosin may efficiently ameliorate bladder outlet obstrution and overactive bladder simultaneously,with no extra danger of uroschesis.
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Calcineurin is a serine-threonine protein phosphatase that plays a pivotal role in a wide series of crucial physiologic processes such as T-cell activation, apoptosis, skeletal myocyte differentiation, and cardiac hypertrophy. A new family of regulators of calcineurin (RCANs) has been shown to modulate calcineurin activity through direct binding of it in vivo. Calcineurindependent signals are transduced to the nucleus by nuclear factor of activated T-cells (NFAT) transcription factors that undergo nuclear translocation upon dephosphorylation and promote transcriptional activation of target genes. The recent researches have revealed that RCAN1 modulating catalytic activity of calcineurin can function as an endogenous backfeed inhibitor during the calcineurin-NFAT signalling pathway. RCANs have now been implicated in several pathological conditions including Alzheimer’s disease, down syndrome and cardiac hypertrophy. In addition, the RCAN family is a rational, functional name for RCAN gene and it is proposed in 2007. It is, therefore, necessary to review the RCAN gene, RCANs and the roles of RCANs in a wide variety of diseases especially including Alzheimer’s disease. It is suggested that regulation of RCAN expression may be a new target on neurodegeneration disease.
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Aim To investigate the rationality and the dose of TSD combined with TSA on reducing serum uric acid and anti-inflammatory.Methods Mice hyperuricemic models were made by uric acid intraperitoneal injection or yeast extract paste intragastric administration.Mice ear swelling model was induced by locally painting dimethylbenzene.Optimized combination dosage of TSD and TSA was obtained using the Codrug software.Results In the mice hyperuricemic models,the serum uric acid in TSD group,TSD plus TSA group and positive control groups was significantly reduced compared with the model group(P