Objective:To establish a microwave digestion and inductively coupled plasma mass spectrometry(ICP-MS)for determination on calcium content of Xiao'er Magan granules and discuss the effect of decocting gypsum into medicine on calcium content.Methods:ICP-MS was adopted to determine the calcium content in the preparation,and the difference of calcium content in the small preparation and Xiao'er Magan granules prepared by different pul-verization degree gypsum and different alcohol precipitation processes were compared.Results:The consistency of calcium content between different enterprises and batches of the same enterprise was poor.The results showed that the larger the particles,the lower the calcium transfer rate.The smaller the particles,the higher the calcium trans-fer rate.Conclusion:The transfer rate of gypsum decocted calcium is related to its degree of comminution to ensure consistency of preparation quality.It is suggested to unify the comminution degree of gypsum.The method can pro-vide guidance for the optimization on preparation technology of Xiao'er Magan granules.

Objective To analyse the quality of Xiao'er Magan granules by the combination of chemometrics and difference analysis of component content.Methods The ultra-performance liquid chromatography/quadrupole time-of-flight-tandem mass spectrometry(UPLC-Q-TOF/MS)method was used to study the characteristic spectrum of basic components.The partial least squares discriminant analysis was used to quantify and screen the markers of quality difference,the methods of muti-component quantification for differential components and fingerprint were established,and the principal component analysis was used to calculate the comprehensive scores of principal components.Results The 12 common peaks were identified by the characteristic spectrum,which were attributed to 6 medicinal herbs,namely Rhizome,Mulberry bark,Bitter almond,Licorice,Perilla seed and Scutellaria.Taking the variable importance projection value＞1 as the criterion,4 characteristic components of quality differences(mulberry A,amygdalin,rosmarinic acid and baicalin)were screened out.The fingerprints similarity of 45 batches of samples were 0.867-0.997.14 components were calibrated,and 8 components were identified,which were mulberroside A,L-amygdalin,amygdalin,rosmarinic acid,baicalin,oroxindin,baicalein and wogonin.The scores of principal component 1 of each enterprise were as follows:G＞H＞A＞C＞E＞D＞F＞I＞B.The scores of principal component 2 were as follows:F＞G＞H＞B＞E＞D＞C＞A＞I.The ranking of the comprehensive scores was as follows:G＞H＞C＞A＞E＞F＞D＞I＞B.Conclusion The preparation quality of enterprise G and H is the best.The established fingerprint and quantitative method of quality differential components are accurate and reliable,which can provide reference for the quality analysis of Xiaoer Magan granules.

ObjectiveTo observe the effect of the Fangfeng Tongshengsan on post-chemoembolization syndrome with primary liver cancer or postoperative liver metastases of colorectal cancer. MethodSeventy-two patients suffered from post-chemoembolization syndrome after transcatheter hepatic arterial chemoembolization were randomly divided into 2 groups， including a Fangfeng Tongshengsan group and a control group， with 36 patients in each group. The patients in Fangfeng Tongshengsan group orally took the decoction for consecutive 7 d. The patients in the control group were physically cooled down with alcohol rub bath and ice pack for consecutive 7 d. Furthermore， the difference of fever， Karnofsky performance status （KPS）， pain in the liver region， nausea vomiting， constipation， and liver function between these two groups were observed. ResultCompared with the control group， Fangfeng Tongshengsan significantly relieved fever， reduced the body temperature （P<0.05）， and shortened the duration of fever （P<0.05）， indicating that Fangfeng Tongshengsan remarkably improved the KPS （P<0.05）. Meanwhile， Fangfeng Tongshengsan obviously alleviated nausea， vomiting， and constipation status and shortened the duration time compared with the control group （P<0.05）. In addition， the parameters of liver function including alanine aminotransferase （ALT）， aspartate aminotransferase （AST）， γ-glutamyl transpeptidase （GGT）， and total bilirubin （TBIL） were significantly decreased in the Fangfeng Tongshengsan group （P<0.05）， which indicated that Fangfeng Tongshengsan alleviated liver dysfunction of patients with post-chemoembolization syndrome. ConclusionFangfeng Tongshengsan can be used to treat post-chemoembolization syndrome with primary liver cancer and postoperative liver metastases of colorectal cancer.

The rapid development of bioeconomy urgently needs the support of biotechnology talents. Establishing an innovative training mode of biotechnology talents can provide support for regional economic development and industrial upgrading. Closely revolved around the concepts of new engineering disciplines development, such as serving the national strategy, docking industry, leading the future development and student-centered, a new economy-oriented training system was developed in School of Bioengineering of Dalian University of Technology. These systems include interdisciplinary curriculum system reconstruction, project-based teaching mode reform, evaluation system implementation and other aspects. The reform and exploration of the first-class biotechnology major under the new economic situation, puts forward the theory of value guidance, deep foundation, strong sense of innovation, technical and non-technical core ability literacy. This reform meets the industry demand for talent diversification, personalization, and dynamic change, helps the merge of industry and education, which provides a way for fostering first-class biotechnology-majored undergraduates.
Humans ; Biotechnology ; Bioengineering ; Biomedical Engineering ; Students ; Curriculum

Objective:To investigate the influence of hemoglobin glycation index (HGI) on the risk of incident chronic kidney disease (CDK) among nondiabetic patients.Methods:Prospective cohort study. At baseline, a total of 7 407 nondiabetic patients without a history of CKD from Pingguoyuan Community of the Shijingshan District in Beijing were included from December 2011 to August 2012, who were then divided into three groups according to the tertiles of their baseline HGI levels. The CKD incidence rate was compared among the different HGI groups at last follow-up. Cox multivariable regression was applied to evaluate whether HGI measures predicted CKD risk. Test for trend across tertiles were examined using ordinal values in separate models.Results:The mean age of the subjects was (56.4±7.5) years, and 4 933 (66.6%) were female. At mean follow-up of 3.23 years, 107 (1.4%) individuals developed CKD. The incidence of CKD was gradually increasing from the low to high HGI groups [1.1% (28/2 473) vs. 1.2% (31/2 564) vs. 2.0% (48/2 370), P=0.016]. In the multivariate Cox regression analysis, after adjustment for potential confounders, the high HGI group had a 68.5% increased risk of CKD compared with the low HGI group ( HR=1.685, 95% CI 1.023 to 2.774). CKD risk increased with increasing HGI tertiles ( P for trend=0.028). Conclusion:High HGI is associated with an increased risk for CKD in the nondiabetic population, indicating that HGI may help identify individuals at high risk for CKD.

Objective:To analyze the epidemiological and etiological characteristics of a dengue fever outbreak in Hunan province in 2018.Methods:Real-time PCR assay was performed for the laboratory diagnosis of 8 suspected dengue fever cases. Etiological surveillance was performed in 186 suspected dengue fever cases and fever cases who had close contacts with dengue fever patients. C6/36 cells was used for the virus isolation from acute phase serum. By sequencing the full length of E genes of 15 dengue virus strains, phylogenetic analysis was performed based on the sequences obtained, including reference sequences from the NCBI GenBank database, the serotypes and gene subtypes of the virus were analyzed to trace the possible source of transmission. An emergency monitoring of vector density and a retrospective survey of sero-epidemiology in healthy population were conducted in the epidemic area.Results:In the serum samples of 8 suspected patients, 6 were dengue virus RNA positive, and 4 were NS1 antigen positive. In 186 suspected patients, 96 were dengue virus nucleic acid, NS1 antigen or antibody positive in etiological test. A total of 64 dengue virus strains were isolated. The phylogenetic analysis showed that all the dengue virus strains belonged to type 2, which might be from Guangdong or Zhejiang provinces. The Bretub index was up to 65, indicating an extremely high risk of transmission. The positive rate of the dengue virus IgG antibody was 0.53%(2/377) in retrospective survey of 377 healthy people.Conclusion:The field epidemiologic and the molecular genetics analyses showed the outbreak of dengue fever in Hunan in 2018 was caused by imported cases and dengue virus 2.

Objective:To confirm the first imported Chikungunya fever (CHIK) epidemic in Hunan province.Methods:Serum samples of patients and colleagues were collected. The nucleic acids of Dengue virus (DENV), Yellow fever virus (YFV), Chikungunya virus (CHIKV) were detected by real- time fluorescent quantitative PCR. The positive PCR products were sequenced. Phylogenetic tree was constructed.Results:The serum samples of the patient and one of the five colleagues were positive for CHIKV. The Blast comparison of gene sequence showed 99% homology with CHIKV sequences. The infected CHIKV belonged to ECSA genotype in the phylogenetic tree.Conclusions:The first imported CHIK epidemic in Hunan province was confirmed through the epidemiological survey and etiologic detection.

Objective: To make etiological diagnosis and evaluate the protective effects of post-exposure prophylaxis(PEP) in an event of one dog injured seven persons. Methods: Direct immunofluorescence assay (DFA) and nested polymerase chain reaction (PCR) were employed to detect nucleoprotein and nucleoprotein(N) gene of rabies virus in the brain tissues of the dog, the positive samples were sequenced for the full length of N gene of rabies virus, then the homology of the N gene of rabies virus was analyzed after the phylogenetic tree was constructed. Rapid fluorescent focus inhibition test (RFFIT) was applied to detect the rabies virus neutralizing antibodies(RVNA) on day 0, 14 and 40 after PEP. Results: The cerebral, cerebellar and hippocampal tissues were positive by DFA and nested PCR. The phylogenetic tree indicated the rabies virus belonged to the rabies virus genotype I. The homology of the nucleotide and amino acid of the rabies virus N gene were over 86% with the vaccine strains. The titer of the RVNA increased significantly from the day 0 to day 14 after PEP, the lowest was 5.78 IU/ml and the highest was 26.15 IU/ml. On the day 40, the highest RVNA titer was 51.96 IU/ml. No rabies cases occurred in a one year follow-up visit. Conclusions Normative PEP can effectively prevent the occurrence of rabies cases.

Objective To investigate the antimicrobial resistant mechanisms of high level carbapenem resistant Klebsiella pneumoniae infection of burn patients .Methods A retrospective study was conducted on totally 18 non-repetitive high level CR-KP which were isolated from burn patients hospitalized between July 2014 and June 2015.MIC of antibiotics were determined by using the GN 13 cards and agar dilution method.The specific PCR and DNA sequence analysis were performed to confirm the β-lactamase type.Plasmid conjugation transfer experiments and southem hybridization were applied to study the mode of carbapenem resistance transmission .Outer membrane proteins ( Omps) were isolated and examined by PCR and ( sodium dodecyl sulfate polyacrylamide gel electrophores ) SDS-PAGE.Pulsed-field gel electrophoresis( PFGE ) and Multilocus sequence typing ( MLST ) was used to determine the genotypes . Results Susceptibility of antimicrobial agents indicated that all these strains with multiple drug resistance . The resistance rate to piperacillin/tazobactam, ceftriaxone, levofloxacin, ciprofloxacin, gentamicin, tobramycin, cefotetan, ceftazidime, cefepime, aztreonam, imipenem, and meropenem was 100％ (18/18).Moreover, the resistance rate of CR-KP isolates to amikacin was 72.2％ ( 13/18 ) , compound sulfamethoxazole was 61.1％(11/18), tigecycline was 0％(0/18).Conjugation study with Escherictda coli J53 resulted in the transfer of significant reduced carbapenem susceptibility from donors (MICs increased at least 8-fold).By PCR, eighteen strains of Klebsiella pneumoniae carried NDM-1 gene, 5 strains carried KPC-2 gene.The blaNDM-1 was transferable by plasmids.Southern blot hybridization indicated that the blaNDM-1 gene was located on plasmid in size of 46 kb.The plasmid belonged to incompatibility group IncX 3.Seven types of CR-KP were detected by PFGE.In addition, MLST assigned them to sequence type ( ST)11, ST395, ST17, ST37, ST263, ST14 and ST76 types.SDS-PAGE and ompK35/36 genes sequence analysis of Omp indicated that there was absence of outer membrane proteins OmpK 36 in ST11, ST395, ST37 strains.However, the other STs strains expressed lower quantities of OmpK 36.Conclusions High level carbapenem resistance in K.pneumoniae causing infection in burn patients is attributable to production of plasmid-mediated metallo· β-laetamase NDM-1 combined with porin OmpK36 deficiency or low expression .The K.pneumoniae with NDM-1 and KPC-2 carbapenemase were detected .

Objective To investigate the capsular polysaccharide (CPS) serotypes and molecular characteristics of carbapenem resistant hypermucoviscous Klebsiella pneumoniae (CR-HMKP) and study the possible mechanism of carbapenem resistance. Methods A retrospective study was conducted on 18 nonduplicate CR-HMKP strains which were collected from the First Affiliated Hospital of Nanchang University from 2012 to 2016. The clinical data were retrieved from medical records. The capsular serotypes, resistance genes and virulence factors were detected by polymerase chain reaction and DNA sequencing. Antimicrobial susceptibility testing was determined on VITEK 2 compact system. The CR-HMKP strains were characterized molecularly by using PCR, multilocus sequence typing (MLST) and pulsed field gel electrophoresis (PFGE). Modified carbapenem inactivation method was used to screen carbapenemase-producing strains. Plasmid conjugation transfer experiments were carried out to study transmission of carbapenem resistance. Results Eighteen (2.7％) CR-HMKP isolates were identified, which belonged to 4 serotypes, including wzi128-K1 (n=1), wzi206-K57 (n=1), wzi2-K2 (n=2), and wzi64-K14.64 (n=14). PCR and sequencing analysis identified blaNDM-1 gene in 2 CR-HMKP strains, blaKPC-2 gene in 17 strains, qnrS1 gene in 18 strains, blaCTX-M-3 gene in 3 strains, blaCTX-M-14 gene in 18 strains, blaTEM-1 gene in 16 strains, blaSHV-12 gene in 17 strains, and rmtB in 5 strains. All the 18 CR-HMKP strains carried virulence-associated genes, including rmpA (88.9％, 16/18), magA (5.6％, 1/18), iroN (83.3％, 15/18), aerobactin (27.8％, 5/18), rmpA2 (66.7％, 12/18) and mrkD (100％, 18/18). Three sequence types (STs) were identified by MLST, including ST11 (15 strains), ST86 (2 strains), and ST412 (1 strain). PFGE resulted in three major PFGE clusters, of which cluster A corresponds to ST1 isolates, and cluster B corresponds to ST86 isolates, and cluster C corresponds to ST412 isolates. All the blaKPC-2- positive strains belonged to ST11. Plasmid conjugation was successful in 5 (27.8％) of the 18 CR-HMKP isolates. Conclusions wzi64-K14.64 is the predominant capsule serotype of the CR-HMKP strains in this hospital. KPC-2 gene conjugationmay contribute to the emergence of CR-HMKP isolates. In addition, CRHMKP strain may be the highly prevalent ST11, and highly virulent CPS serotypes harboring K1/K2.