Objective To investigate the suppression effect of expressing parvovirus H-1 nonstructural protein 1 (NS1) gene on human gastric cancer cells and the possible mechanisms.Methods A recombinant enhanced green fluorescent protein (eGFP) labeled NS1 of parvovirus H-1 plasmid was constructed.Human gastric cancer cell line SGC7901 was transfected with recombinant plasmid (experiment group) or blank vector (negative control group) and blank control group was treated with equal amount of phosphate buffered saline (blank control group).After transfection,the distribution of fluorescent signal was observed under fluorescent microscope.The expression of NS1 at gene and protein level was measured.Cell growth curve of each group was drawn.The expression of cell senescence-associated β-galactosidase (SA-β-Gal) was tested.The changes of cell cycle were investigated by flowcytometry.Two groups' comparision was performed by t-test.Results After transfection,NS1 was expressed in SGC7901 cells at gene and protein level.Compared with negative control group,the fluorescent signal accumulated in cell nucleus in experiment group.The percentage of SA-β-Gal positive cell in experiment group ((30.5 ± 1.4) ％) was higher than that of negative control group ((4.4± 1.1) ％) and the difference was statistically significant (t =-12.931,P ＜ 0.01).The growth inhibition rate of SGC7901 cells from the first day to the fourth day was 45％,62％,73％ and 77％,respectively.The cell cycle of eGFP-NS1 expressed SGC7901 cells was arrested at G0/G1 phase.Conclusion Parvovirus H-1 NS1 play the role in cell nucleus of gastric cancer cell line SGC7901 and could make cell cycle arrested at G0/G1 phase,which effectively inhibited the proliferation SGC7901 cell.

Objective To study the releasing properties and mechanism in vitro of the active ingredients of the gastric floating sustained-release tablet containning Zuojin Pellet extraction(ZJ-GFST).Methods The release rates of berberine,palmatine,evodiamine,and rutaecarpine from ZJ-GFST in vitro within 8 h were measured by using rotating basket method in Chinese Pharmacopeia.The cumulative curve of drug release data was fitted to zero order,first-order and Higuchi equation to ascertain the kinetic modeling of drug release.Release mechanism was ascertained using Peppas equation.Results The similar factors of the cumulative release curve of all the four ingredients mutually compared were more than 80%,indicating that the release of the four ingredients were similar.The cumulative release rate of all the four ingredients fitted Higuchi equation.The value of slopes of Peppas models of all the four ingredients were more than 0.45,indicating that drug released by concurrent action of diffusion and matrix erode(non-fickian diffusion).Conclusion The releasing properties in vitro of the active ingredients of ZJ-GFST is consistent.

The effect of obesity on idiopathic central precocious puberty (ICPP) girls is still under discussion.The relationship between body mass index (BMI) and sexual hormone levels of gonadotropin-releasing hormone (GnRH) stimulation test in ICPP girls is controversial and the underlying mechanism is unclear.This study aims to further explore the independent effect of excess adiposity on peak luteinizing hormone (LH) level of stimulation test in ICPP girls and the role of other related factors.A retrospective cross-sectional study was performed on 618 girls diagnosed as having ICPP,including 355 cases of normal weight,99 cases of overweight and 164 cases of obese.The results showed that obese group had more progressed Tanner stage and no significant difference (P=0.28) in LH peak was found as basal LH value was used as a covariate.The obese group had higher total testosterone (TT),adrenocorticotrophic hormone (ACTH),17-α hydroxyprogesterone (17-αOHP) and androstendione (AN),with significantly increased fasting insulin (FIN) and homeostasis model of assessment for insulin resistance index (HOMA-IR).Stratified analysis showed inconsistency of the relationship between BMI-standard deviation score (BMI-SDS) and LH peak in different Tanner stages (P for interaction=0.017).Further smoothing plot showed linear and non-linear relationship between BMI-SDS and LH peak in three Tanner stages.Then linear regression model was used to analyze the relationship between BMI-SDS and LH peak in different Tanner stages,with and without different confounding factors being adjusted.In B2 stage,BMI-SDS was negatively associated with LH peak.In B3 stage,when BMI-SDS ＜1.5,as BMI-SDS increased,the level of LH peak decreased (model Ⅰ:β=-1.8,95％ CI=-4.7 to 1.1,P=0.214).When BMI-SDS ≥1.5,BMI-SDS was significantly positively associated with LH peak (model Ⅰ:β=4.5,95％ CI=1.7 to 7.4,P=0.002).In B4 stage,when BMI-SDS ＜1.5,BMI-SDS was negatively associated with LH peak (model Ⅰ:β=-11.6,95％ CI=-22.7 to-4.5,P=0.049).When BMI-SDS ≥1.5,BMI-SDS was positively associated with LH peak (model Ⅰ:β=-4.2,95％ CI=-3.3 to 11.7,P=0.28).It is concluded that there is an independent correlation between BMI-SDS and LH peak of stimulation test in ICPP girls,their relationships are different in different Tanner stages,and the effect of BMI-SDS can be affected by adrenal androgens,estradiol and glucose metabolism parameters.

OBJECTIVETo study the epdimiology characteristics and the diversity of VP6 gene of GCRV in Lulong, and to provide the basis for GCRV in-depth research.

METHODS793 stool specimens from porcine with diarrhea or not from Lulong in 2007 and 2008. GCRV was detected by nested multiple reverse transcription- polymerase chain reaction (nested RT-PCR) , and analyzed the identity and conducted phylogenetic tree by the seqences.

RESULTSThe positive rate of GCRV was 16.65%. Porcine GCRV strains of Lulong had significant homology differences. Phylogenetic analysis indicated porcine GCRVs were with significant diversity. Amino acid analysis showed GCRV strains with the same host shared the nearest kinship.

CONCLUSIONThe infection rate of GCRV was high from 2007 to 2008 in Lulong. Homology and phylogenetic analysis showed that VP6 gene diversity was widespread. The experimental data provided basis for molecular characteristics of porcine GCRVs.

Animals ; Antigens, Viral ; genetics ; Capsid Proteins ; genetics ; China ; Genetic Variation ; Humans ; Phylogeny ; Rotavirus ; classification ; genetics ; isolation & purification ; Swine

OBJECTIVETo research the influence of glycyrrhiza extract on the pharmacokinetics characteristic parameters of daphnetin, which was aimed to explore the rationality of concert application of drugs.

METHODThe rats received intragastric administration of daphnetin and glycyrrhiza extract containing the same daphnetin respectively. The blood concentration of daphnetin was assayed by LC-MS. The data was processed by program DAS2.1.1.

RESULTGlycyrrhiza extract can reduce the t(1/2), tmax and Ke of daphnetin, while increased the Ka and AUC(0-infinity).

CONCLUSIONGlycyrrhiza extract promoted the oral absorption of daphnetin, slowed down the elimination and increased the biological availability.

Animals ; Drug Interactions ; Drugs, Chinese Herbal ; pharmacology ; Glycyrrhiza ; chemistry ; Rats ; Rats, Sprague-Dawley ; Tissue Distribution ; drug effects ; Umbelliferones ; pharmacokinetics

Fingerprinting techniques play a increasingly important role in the quality control standards of traditional Chinese medicines (TCM), research and establish the fingerprint about spectral-efficiency could improve the quality control of TCM. The necessity of the fingerprint pharmacodynamics research and the analysis and evaluation of the research methods in the existing literature at home and abroad were reviewed in this article, Combined with the author's laboratory research, we proposed the research methods of fingerprint pharmacodynamics of TCM and provided the basis for effectively promoting the the establishment and development of fingerprint pharmacodynamics of Chinese medicine compound preparations.
Animals ; Biomedical Research ; methods ; Drugs, Chinese Herbal ; chemistry ; Humans ; Medicine, Chinese Traditional ; Pharmacology ; methods

OBJECTIVETo assess the effects of early intestinal application of sijunzi decoction (SJZD) on the immune function in post-operational patients of gastrointestinal tumor.

METHODSNinety-two patients with malignant gastrointestinal tumor were randomly divided into two groups. Patients in both groups were given the isocaloric and isonitrogenous enteral nutritional support starting from the first day after operation for 1 week, but to the tested group, SJZD was given additionally. The concentration of serum cytokines such as interleukin-1 (IL-1), interleukin-2 (IL-2), interleukin-6 (IL-6) and tumor necrosis factor-alpha (TNF-alpha), the peripheral blood cell counts of total lymphocyte, T-lymphocyte, B lymphocyte, and T lymphocyte subsets (CD3, CD4, CD8, CD4/CD8) as well as the levels of IgA, IgG, IGM and C-reactive protein (CRP) were measured on the day before operation, the first morning after operation and at the end of study.

RESULTSAt the end of the study, the concentration of IgA, IgG, 1gM, number of total lymphocyte, CD3, CD4 and CD4 lCD8, and serum IL-2 were obviously higher (P < 0.05), and levels of IL-6, TNF-alpha and CRP were obviously lower in the tested group than those in the control group (P < 0.05).

CONCLUSIONEarly application of SJZD on the base of enteral nutritional therapy can lessen the degree of post-operational stress and inflammatory response, and enhance the immune function of patients.

Adult ; Aged ; CD4-CD8 Ratio ; Drugs, Chinese Herbal ; therapeutic use ; Female ; Gastrointestinal Neoplasms ; drug therapy ; immunology ; surgery ; Humans ; Immunoglobulin A ; blood ; Immunoglobulin G ; blood ; Interleukin-1 ; blood ; Interleukin-2 ; blood ; Male ; Middle Aged ; Phytotherapy ; Postoperative Period

·AIM: To evaluate the safety and postoperative complications of femtosecond laser - assisted small incision lenticule extraction (SMILE). ·METHODS: Retrospective case series. A total of 1127 patients (2 236 eyes) who were treated with SMILE for myopia or myopia astigmatism between June 2016 and May 2017 were enrolled in this study. Eyes that developed postoperative complications were noted and identified. The incidence, risk factors, management and prognosis were analyzed. The follow-up was 6mo. ·RESULTS: The rate of postoperative complications was 8. 05%, included diffuse lamellar keratitis (3. 31%), delayed visual acuity (2. 59%), minor interface residue (0. 63%), and ghost images ( 1. 52%). These complications had an impact on best corrected visual acuity (BCVA) at 3mo in only 1 eye with decentered ablation and was re-treated with topography-guided laser- assisted subepithelial keratomileusis (LASEK). Good visual outcomes were achieved in all eyes finally. · CONCLUSION: Although few eyes suffered postoperative complications, SMILE is an acceptable safe surgery. Careful surgical skill, appropriate surgical parameter, and rational postoperative medication can decrease the risk of complication.

Objective To evaluate the predictive value of a combined model based on clinical and radiomics features for the invasiveness of lung adenocarcinoma manifesting as ground glass nodule(GGN).Methods Clinical data of patients with GGN-type lung adenocarcinoma who underwent chest CT and were confirmed by surgical pathology at some hospital from January to December 2019 were analyzed retrospectively,and the extraction of imaging histological features was performed using Python-based open resource Pyradiomics.A clinical model was constructed based on independent risk factors obtained from univariate and multivariate analyses,a radiomics model was built using the screened radiomics features,and a combined model was established with the predictive values of the clinical models and radiomics scores(Radscore).The predictive performance of the three models in the training and test sets was assessed using ROC curves,the statistical significance of the differences in the ROC curves of the three models for predicting GGN-type lung adenocarcinoma was assessed using the Delong test,and the net benefits of the models were analyzed using clinical decision curves.Results Logistic multifactor analysis showed that age(P=0.020 2)and vascular characteristics(P=0.002 2)were the independent predictors of the degree of the invasiveness of lung adenocarcinoma.The AUCs of the radiomics model,clinical model and combined model were 0.876,0.867 and 0.904 on the training set,and 0.828,0.828 and 0.864 on the test set,respectively.The difference between the ROC curves of the combined model and the clinical and radiomics models was not statistically significant(P>0.05)on the test set.Clinical decision curves showed a higher clinical benefit when using the combined model to predict the invasiveness under most conditions of threshold probability.Conclusion The combined model based on clinical and radiomics features enhances the predictive performance for the invasiveness of GGN-type lung adenocarcinoma.

OBJECTIVETo evaluate the efficacy of the interferon alpha-2b nasal spray in prevention of rubella and measles virus infections.

METHODSThe properly selected volunteer groups have been divided into interferon alpha-2b experimental and control group. The experimental group received interferon alpha-2b treatment by nasal spray for 2 days before the immunization, then both groups were challenged with rubella and measles attenuated live vaccine respectively through nasal spray. The sera from pre-immunization and 21 and 28 days after immunization were collected to test the IgG antibody titers. The influence on the viral antibody titer reflects the viral preventive effect by interferon alpha-2b.

RESULTSThe antibody titer difference of measles virus between experimental and control group was 1.26 (21 day) and 2.96 (28 day), there were statistically difference between them; the difference of rubella virus was 0.95 (21 day) and 0.37 (28 day), but there were no statistically differences found.

CONCLUSIONThe preliminary results showed that the interferon alpha-2b can be used as prevention method for measles and rubella viral infections.

Administration, Intranasal ; Adult ; Antibodies, Viral ; blood ; Antiviral Agents ; administration & dosage ; therapeutic use ; Female ; Humans ; Interferon-alpha ; administration & dosage ; therapeutic use ; Male ; Measles ; immunology ; prevention & control ; virology ; Measles Vaccine ; immunology ; therapeutic use ; Measles virus ; drug effects ; immunology ; Recombinant Proteins ; Rubella ; immunology ; prevention & control ; virology ; Rubella Vaccine ; immunology ; therapeutic use ; Rubella virus ; drug effects ; immunology ; Treatment Outcome ; Vaccination ; methods ; Vaccines, Attenuated ; immunology ; therapeutic use ; Young Adult