RESUMEN

PURPOSE: Biliary atresia (BA) poses a persistent challenge characterized by ongoing liver inflammation and subsequent fibrosis even after the clearance of jaundice (COJ). This study aimed to evaluate the therapeutic potential of eicosapentaenoic acid (EPA) in alleviating liver inflammation and limiting fibrosis during the post-COJ phase of BA. METHODS: Among the BA patients undergoing laparoscopic Kasai portoenterostomy (lapKP) between December 2016 and October 2021, EPA (20-40 mg/kg/day) was administered orally to those whose parents consented. The study included patients from January 2014 to October 2021, classifying them into two groups: EPA-treated (Group E) and untreated (Group N). Their liver fibrosis and clinical course at 1 and 2 years post-lapKP were compared. RESULTS: Group E consisted of 25 patients, while Group N comprised 32 patients. Twenty-one patients in Group E and 25 patients in Group N achieved COJ (p = 0.74). Among jaundice-free patients at 1 and 2 years post-lapKP, Group E exhibited significantly lower M2BPGi levels and platelet counts, and Group E showed a significant reduction in Aminotransferase-to-Platelet Ratio Index (APRI) at 2 years post-lapKP. CONCLUSION: Although EPA administration did not improve COJ, it attenuated the progression of liver fibrosis during the 2 years following lapKP in jaundice-free patients. (200/200Words).

Asunto(s)

RESUMEN

BACKGROUND: In patients with biliary atresia (BA), severe portal hypertension (HTN) develops even with successful bile flow restoration, suggesting an intrinsic factor driving portal HTN independent from bile obstruction. We hypothesize that patients with BA have abnormal portal vein (PV) development, leading to PV hypoplasia. METHODS: In this observational cohort study, we enrolled patients who were referred to a tertiary center from 2017 to 2021 to rule out BA. Newborns who underwent computed tomography (CT) angiogram as a clinical routine before intraoperative cholangiogram, and laparoscopic Kasai hepatoportoenterostomy. The diameter of the PV and hepatic artery (HA) were compared to the degree of liver fibrosis in the wedge biopsies. The jaundice clearance, native liver survival, and clinical portal hypertensive events, including ascites development and intestinal bleeding, were assessed. RESULTS: 47 newborns with cholestasis were included in the cohort; 35 were diagnosed with BA. The patients with BA had a smaller median PV diameter (4.3 vs. 5.1 mm; p < 0.001) and larger median HA diameter (1.4 vs. 1.2 mm; p < 0.05) compared to the patients with other forms of cholestasis. The median PV and HA diameter did not correlate with the degree of liver fibrosis. Among 35 patients with BA, 29 patients (82.9%) achieved jaundice clearance, and 23 patients (65.7%) were alive with their native liver at two years of age. Seven patients (20%) developed intestinal bleeding, and seven patients (20%) developed ascites, with one overlapping patient. CONCLUSION: PV hypoplasia is present in patients with BA independent of liver fibrosis at the time of diagnosis.

RESUMEN

Objective To analyze the clinical characteristics of lung adenocarcinoma patients with positive EGFR mutations detected in pleural effusion.Methods We retrospectively analyzed the clinical characteristics including gender,age,smoking history,presence of other underlying diseases(such as COPD,cardiovascular disease,and diabetes),site of pleural fluid,feature of pleural fluid,and TNM stage in patients with lung adenocar-cinoma who had been admitted to the first Affiliated Hospital of Bengbu Medical College from 2020.01 to 2022.12 for the first time by the detection of EGFR mutation positive in pleural effusion.The data were statistically analyzed using the SPSS 26.0 software.Results A total of 126 patients were screened for enrollment,including 61 patients(48.41%)with EGFR exon 19 deletion mutation(19del),56 patients(44.44%)with exon 21 L858R mutation(21L858R),and 9 patients(7.14%)with non-classical mutations.Univariate analysis showed that the three muta-tion subtypes were statistically significant in terms of gender,age,smoking history,and presence of COPD(P<0.05 for all comparisons),but not in terms of pleural fluid site,feature of pleural fluid,tumor size,and presence of cardiovascular disease,diabetes mellitus,presence of distant metastases,and mediastinal lymph node metastases(P>0.05 for all comparisons);Multivariate analysis showed that 21 L858R mutation was more likely to be found in male,older age,non-smoking,and presence of COPD than 19del mutation;non-classical mutation was more likely to be found in male than 19del mutation.Conclusions There are significant differences among the three mutation subtypes in sex,age,smoking history,and presence of COPD,but not in pleural fluid location,feature of pleural fluid,tumor size,presence of cardiovascular disease or diabetes mellitus,presence of distant metastases,or medias-tinal lymph node metastases;Among lung adenocarcinoma patients with positive EGFR mutations in pleural fluid,21 L858R mutation mostly occurs in male,older age,non-smokers,and those complicated with COPD,while non-classical mutation mainly develops in male.However,more case studies are needed to confirm the above conclusions.

RESUMEN

Gliomas are the most common primary intracranial tumors in adults, among which high-grade glioma patients are characterized by short survival and poor prognosis. The diagnosis, treatment, evaluation of effective treatments, and prognosis prediction of high-grade gliomas are of great significance for improving patient survival. Conventional enhanced magnetic resonance imaging has deficiencies in delineating tumor extent, identifying tumor progression and treatment-related changes. Therefore, there is a broad consensus to incorporate amino acid PET, and 18F-FET PET inparticular, into the diagnostic and therapeutic process of high-grade gliomas. In this article, we review the new research progress of 18F-FET PET in the diagnosis and treatment of adult high-grade glioma in recent years.

RESUMEN

Gliomas are the most common primary intracranial tumors in adults, among which high-grade glioma patients are characterized by short survival and poor prognosis. The diagnosis, treatment, evaluation of effective treatments, and prognosis prediction of high-grade gliomas are of great significance for improving patient survival. Conventional enhanced magnetic resonance imaging has deficiencies in delineating tumor extent, identifying tumor progression and treatment-related changes. Therefore, there is a broad consensus to incorporate amino acid PET, and 18F-FET PET inparticular, into the diagnostic and therapeutic process of high-grade gliomas. In this article, we review the new research progress of 18F-FET PET in the diagnosis and treatment of adult high-grade glioma in recent years.

RESUMEN

Objective:To analyze the expression levels of urinary interleukin-6 (IL-6), signal transducer and activator of transcription 3 (STAT3) and heparin-binding protein (HBP) in urinary tract infection and its correlation with infection prognosis.Methods:The clinical data of 100 patients with urinary tract infection (urinary tract infection group) from January 2021 to December 2022 in the Affiliated Hospital of Jining Medical College were retrospectively analyzed. Among them, simple urinary tract infection was in 62 cases, and complex urinary tract infection was in 38 cases; after treatment, 25 cases were not cured, and 75 cases were cured. Another 50 healthy examinees were selected as the health control group. The level of urine IL-6 was detected by luminescence assay method, the level of urine STAT3 was detected by enzyme-linked immunosorbent assay method, and the level of urine HBP was detected by fluorescence immunochromatography method. The blood routine was detected by fully automated blood cell analyzer, and the blood cell count was recorded. The levels of serum C-reactive protein (CRP) and procalcitonin (PCT) were detected by radioimmunoassay. The correlation between urine IL-6, STAT3, HBP and blood routine inflammatory response markers was analyzed by Pearson method. The receiver operating characteristic (ROC) curve was used to evaluate the predictive effectiveness of urine IL-6, STAT3, HBP and blood routine inflammatory response markers in infection prognosis.Results:The urine IL-6, STAT3, HBP, and blood CRP, PCT, white blood cell count in urinary tract infection group were significantly higher than those in healthy control group: (33.19 ± 11.02) μg/L vs. (16.84 ± 3.57) μg/L, (66.77 ± 19.58) μg/L vs. (38.69 ± 11.04) μg/L, (151.98 ± 42.00) μg/L vs. (28.55 ± 9.16) μg/L, (12.57 ± 4.19) mg/L vs. (5.23 ± 1.80) mg/L, (0.58 ± 0.19) μg/L vs. (0.22 ± 0.07) μg/L and (9.86 ± 3.20) × 10 9/L vs. (6.44 ± 2.13) ×10 9/L, and there were statistical differences ( P<0.01). The urine IL-6, STAT3, HBP, and blood CRP, PCT, white blood cell count in patients with complex urinary tract infection were significantly higher than those in patients with simple urinary tract infection: (40.25 ± 10.34) μg/L vs. (28.87 ± 8.55) μg/L, (79.50 ± 17.92) μg/L vs. (58.96 ± 13.43) μg/L, (186.51 ± 35.92) μg/L vs. (130.82 ± 39.74) μg/L, (14.09 ± 4.18) mg/L vs. (11.64 ± 3.55) mg/L, (0.64 ± 0.20) μg/L vs. (0.55 ± 0.13) μg/L and (11.27 ± 3.08) × 10 9/L vs. (8.99 ± 2.36) × 10 9/L, and there were statistical differences ( P<0.01). The urine IL-6, STAT3, HBP, and blood CRP, PCT, white blood cell count in patients with untreated urinary tract infection were significantly higher than those in patients with cured urinary tract infection: (42.97 ± 11.51) μg/L vs. (29.93 ± 8.66) μg/L, (86.81 ± 20.35) μg/L vs. (60.09 ± 17.43) μg/L, (264.27 ± 28.76) μg/L vs. (114.55 ± 21.38) μg/L, (19.11 ± 3.28) mg/L vs. (10.39 ± 2.40) mg/L, (0.85 ± 0.14) μg/L vs. (0.49 ± 0.11) μg/L and (12.26 ± 2.77) × 10 9/L vs. (9.06 ± 2.34) ×10 9/L, and there were statistical differences ( P<0.01). Pearson correlation analysis result showed that urine IL-6, STAT3, HBP were positively correlated with blood CRP, PCT, white blood cell count ( P<0.01). The ROC curve analysis result showed that the area under curve (AUC) of urine IL-6, STAT3 and HBP in predicting the infection prognosis in patients with urinary tract infection was greater than that of blood CRP, PCT and white blood cell count; moreover, the AUC and sensitivity of the combined of urine IL-6, STAT3 and HBP in predicting the infection prognosis in patients with urinary tract infection were significantly higher than the combined of blood CRP, PCT and white blood cell count (0.937 vs. 0.898 and 96.00% vs. 76.00%), but with lower specificity (81.33% vs. 98.67%). Conclusions:Urinary tract infections can cause elevated urine IL-6, STAT3 and HBP, and the degree of elevation is related to the types of simple or complicated infection and the infection prognosis. The combined detection of the urine IL-6, STAT3 and HBP is expected to be a method to predict the infection prognosis, and it provides reference information for clinical diagnosis and treatment.

RESUMEN

Objective:To investigate the effects of educational level on smoking cessation in patients with moderate to severe tobacco dependence, explore effective individualized smoking cessation methods, and increase smoking cessation rate.Methods:A total of 480 patients with moderate to severe tobacco dependence who were willing to quit smoking and received treatment in the Department of Respiratory and Critical Care Medicine, Shengli Oilfield Central Hospital from January to December 2020 were included in this study. They were divided into four groups ( n = 120/group) according to their educational level: group A (elementary school and below), group B (junior high school and senior high school), group C (technical secondary school or college), and group D (university and above). All patients were randomly assigned to undergo "5A" intervention alone or "5A" intervention combined with varenicline intervention (combined intervention). Patients' awareness of the health risks of tobacco smoking was compared among the four groups. The smoking cessation rate measured at different time points was compared between different intervention strategies. Results:The scores of health risk of tobacco smoking in groups D, C, B, and A were (806.5 ± 35.7) points, (710.8 ± 26.2) points, (643.6 ± 43.4) points, and (512.4 ± 30.1) points, respectively. Patients with high education levels had high awareness of the health risk of tobacco smoking ( F = 1 543.26, P < 0.001). At 1, 3, and 6 months, the smoking cessation rate of combined intervention was higher than that of "5A" intervention alone in each group (group A: χ2 = 3.85, 4.23, 4.10, group B: χ2 = 4.30, 4.09, 4.60, group C: χ2 = 6.81, 4.30, 4.03, group D: χ2 = 6.71, 6.51, 4.73, all P < 0.05). The smoking cessation rate after 6 months of "5A" intervention alone or combined intervention in group D was 60.0% and 78.3% respectively, which were significantly higher than 41.7% and 60.0% in group C, 23.3% and 41.7% in group B, and 20.0% and 36.7% in group A ( χ2 = 26.59, 26.12, both P < 0.001). At different time points, the smoking cessation rates of the "5A" intervention alone in group D were significantly higher than those of combined intervention in groups A and B ( χ2 = 9.25, 25.04, 7.29, all P < 0.05). Conclusion:Awareness of the health risks of tobacco smoking is related to a patient's educational level, and affects smoking cessation. Individualized smoking cessation interventions based on a patient's educational level can increase the rate of smoking cessation.

RESUMEN

OBJECTIVE To explore the effects of posaconazole combined with proton pump inhibitors （PPI） on the blood concentration and the risk of invasive fungal disease （IFD） in patients with malignant hematological disorder. METHODS In accordance with the random number table method， 40 patients with malignant hematological disorders who were admitted to the hematology department of our hospital between December 2020 and December 2021 were chosen and divided into control group （20 cases） and observation group （20 cases）. The control group received Posaconazole oral suspension alone， while the observation group received Posaconazole oral suspension combined with PPI. The incidence of IFD， attainment rate of blood concentration， the time from the start of prophylaxis to IFD onset， the fatality associated with IFD， treatment of infected patients， and blood concentrations of posaconazole on 7th， 14th， 21st， and 28th day after posaconazole application were compared between 2 groups； the occurrence of adverse events during drug administration in the two groups was recorded. RESULTS The study was stopped because 2 patients in the observation group and 9 patients in the control group received hospital departures after taking posaconazole for fewer than 7 days. The incidence of IFD in the observation group was significantly higher than control group， and the attainment rate of blood concentration in the observation group was significantly lower than control group （P＜0.05）. There was no significant difference in the time from the start of prophylaxis to IFD onset， the fatality associated with IFD， treatment of infected patients and the incidence of adverse events （P＞ 0.05）. The blood concentration of posaconazole in the observation group was significantly lower than control group on 7th day of medication （P＜0.05）； there was no significant in blood concentration of posaconazole between 2 groups on the 14th day of medication （P＞0.05）. CONCLUSIONS Posaconazole combined with PPI can reduce the blood concentration of patients with malignant hematological disorders， increase the risk of IFD. Clinical practice should try to avoid the combination of the two or use them under the guidance of therapeutic drug monitoring.

RESUMEN

The clinical characteristics, laboratory results, response to treatment, and prognosis of 46 macrofocal multiple myeloma(MFMM) patients at our center from January 2013 to December 2019 were analyzed retrospectively. The other 92 patients were selected as matched-controls based on diagnostic period and treatment. Among the 1 137 MM patients, 46 patients met the definition criteria of MFMM (4.0%), with median age 56 years, which was not statistically different from whole MM population ( P=0.066). According to the international staging system (ISS) and Revised ISS, the proportion of patients with advanced stage in MFMM group was less common than that of controls ( P<0.05). More plasmacytomas in MFMM patients were presented (43.5% vs. 18.5%, P<0.05). Regarding cytogenetic abnormalities, there were minor patients manifesting high-risk features in MFMM group (15.8% vs. 32.2%, P=0.058). Translocation(11;14) could be detected in 32.4% MFMM patients and 9.4% typical myeloma patients ( P<0.05). The treatment regimens were comparable. As to the best response of treatment, the complete response (CR) rate in MFMM group was significantly higher than that of controls (78.3% vs. 60.9%, P<0.05). The median follow-up time was 37.9 months. The median progression-free survival in MFMM and control groups were 77.5 vs. 39.8 months, respectively ( P<0.05). The overall survival (OS) of MFMM patients was significantly longer (not reached vs. 68.2 months, P<0.05).

RESUMEN

Objective:To compare the short-term clinical efficacy, adverse reactions and pharmacoeconomics of advanced mutation negative lung adenocarcinoma treated by albumin-bound paclitaxel or pemetrexed combined with cisplatin.Methods:From September 2019 to October 2020, 80 patients with advanced lung adenocarcinoma diagnosed in the First Affiliated Hospital of Bengbu Medical College were divided into observation group and the control group according to the randomized digital table, with 40 cases in each group. The observation group received albumin-bound paclitaxel combined with cisplatin, and the control group received pemetrexed combined with cisplatin. After 2 cycles of treatment, the short-term efficacy and the adverse reactions of the two groups were evaluated. The cost of chemotherapy drugs and the average length of hospital stay were compared between the two groups.Results:The objective response rates of the observation group and the control group were 30.0% (12/40) and 32.5% (13/40), the disease control rates were 77.5% (31/40) and 82.5% (33/40) respectively, and there were no significant differences ( χ2=0.058, P=0.809; χ2=0.313, P=0.576). The adverse reactions of the two groups were mainly grade Ⅰ-Ⅱ. The incidences of leucopenia, neutropenia, thrombocytopenia, hemoglobin decreased, gastrointestinal reaction, liver function damage and renal function damage in the observation group were 20.0% (8/40), 20.0% (8/40), 20.0% (8/40), 17.5% (7/40), 37.5% (15/40), 12.5% (5/40) and 7.5% (3/40) respectively, those in the control group were 25.0% (10/40), 20.0% (8/40), 17.5% (7/40), 15.0% (6/40), 32.5% (13/40), 17.5% (7/40) and 5.0% (2/40) respectively, and there were no statistically significant differences between the two groups ( χ2=0.287, P=0.592; χ2<0.001, P>0.999; χ2=0.082, P=0.775; χ2=0.092, P=0.762; χ2=0.220, P=0.639; χ2=0.392, P=0.531; χ2<0.001, P>0.999). The median cost of chemotherapy drugs and the median length of hospital stay in the observation group were 7 453 yuan and 6 days respectively, which were less than 8 956 yuan and 7 days in the control group, with statistically significant differences ( Z=-3.057, P=0.002; Z=-2.733, P=0.006). Conclusion:The short-term efficacy of albumin-bound paclitaxel combined with cisplatin is equal to pemetrexed combined with cisplatin in treatment of advanced mutation negative lung adenocarcinoma, and the adverse reactions are similar. However, the average cost of chemotherapy drugs of albumin-bound paclitaxel combined with cisplatin is less than pemetrexed combined with cisplatin, and the average length of hospital stay is shorter.

RESUMEN

Nuclear receptor subfamily 2, group F, member 6 (NR2F6) is a member of orphan nuclear receptors, which is expressed in major tissues and organs of the human body, and plays an important role in the regulation of various biological functions and gene expressions. Recent studies have shown that the expression of NR2F6 was up-regulated in a variety of malignant tumors and showed significant correlations with cancer progression. These findings triggered the widespread interest in understanding the relationship between NR2F6 and cancer development and progression. In addition, the latest studies have underscored that NR2F6 was involved in enhancing antitumor immune responses that could serve as a potential target for immune regulation. This review summarizes the biological functions of NR2F6 and its role in tumors, with the aim to provide new insights into effective cancer therapies.

Asunto(s)

RESUMEN

ObjectiveTo investigate the performance of serological test and dynamics of serum antibody with the progress of SARS-CoV-2 infections. MethodsA total of 419 patients were enrolled including 19 confirmed cases and 400 patients from fever clinics. Their serial serum samples collected during the hospitalization were menstruated for IgM and IgG against SARS-CoV-2 using gold immunochromatographic assay and chemiluminescence immunoassay. We investigated whether thermal inactivation could affect the results of antibody detection. The dynamics of antibodies with the disease progress and false positive factors for antibody testing were also analyzed. ResultsThe positive rate of IgG detection was 91.67% and 83.33% using two CLIA, respectively. However, the IgM positive rate was dramatically declined might due to the lack of blood samples at early stages of the disease. The chemiluminescence immunoassay had a favorable but narrow linear range. Our work showed increased IgG values in serums from virus-negative patients and four negative samples were IgG weak-positive after thermal incubation. Our data showed the specificity of viral N+S proteins was higher than single antigen. Unlike generally thought that IgM appeared earlier than IgG, there is no certain chronological order of IgM and IgG seroconversion in COVID-19 patients. It was difficult to detect antibodies in asymptomatic patients suggesting that their low viral loads were not enough to cause immune response. Analysis of common interferent in three IgG false-positive patients, such as rheumatoid factor, proved that false positives were not caused by these interfering substances and antigenic cross-reaction. ConclusionsViral serological test is an effective means for SARS-CoV-2 infect detection using both chemiluminescence immunoassay and gold immunochromatographic assay. Chemiluminescence immunoassay against multi-antigens has obvious advantages but still need improve in reducing false positives.

RESUMEN

The acetabular labrum, a tough fibrocartilaginous structure attached to the periphery of the osseous acetabular rim, plays an important role in maintaining hip stability, pressure balance, and growth.In the developmental dysplasia of the hip(DDH), the abnormal stress on the acetabulum after dislocation or subluxation of the femoral head causes the labrum to become hypertrophy and degeneration, which become the obstacle of the central reduction.However, the treatment of acetabular labrum in DDH is still controversial.This article reviews the anatomical and imaging features of the normal labrum and DDH labrum and its effect on DDH treatment.

RESUMEN

The acetabular labrum,a tough fibrocartilaginous structure attached to the periphery of the osseous acetabular rim,plays an important role in maintaining hip stability,pressure balance,and growth.In the developmental dysplasia of the hip (DDH),the abnormal stress on the acetabulum after dislocation or subluxation of the femoral head causes the labrum to become hypertrophy and degeneration,which become the obstacle of the central reduction.However,the treatment of acetabular labrum in DDH is still controversial.This article reviews the anatomical and imaging features of the normal labrum and DDH labrum and its effect on DDH treatment.

RESUMEN

Although great progress has been made in the treatment of multiple myeloma (MM), it is still an incurable malignant plasma cell tumor. In addition to the MM cell itself, the bone marrow microenvironment also plays a critically important role to prompt MM cell's survival, growth, and drug resistance. Bone microenvironment reformed by MM cells could not only help the proliferation of MM cells, but also inhibit the killing of the immune system to MM. A variety of cell components and mechanisms participate in the formation of immune microenvironment, including high-profile tumor associated myeloid cells (TAMC). This paper introduces the mechanisms of TAMC in MM immunosuppressive microenvironment.

RESUMEN

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.

RESUMEN

The increasing number of genetic manipulation approaches and high-resolution live imaging technique applied in zebrafish have propelled the rise of this organism as a mainstream model for developmental biology and human diseases studies. Zebrafish has many advantages for functional genomics analysis, allowing for easy, cheap and fast functional characterization of novel genes in the vertebrate genome. Here we provide an overview of the principles of genetic manipulation in zebrafish, such as Ethylnitrosourea (ENU) mutagenesis, insertional mutagenesis, gene trapping mutagenesis, Morpholino mediated gene knockdown, targeting induced local lesions in genomes (TILLING), genome editing with engineered nucleases ZFN (Zinc finger nuclease), TALEN (Transcription activator-like effector nuclease) and CRISPR/Cas9 system, and transgenic methods used in zebrafish.

RESUMEN

The effects of tanshinone IIA on the proliferation of the human non-small cell lung cancer cell line A549 and its possible mechanism on the VEGF/VEGFR signal pathway were investigated. The exploration of the interaction between tanshinone IIA and its target proteins provides a feasible platform for studying the anticancer mechanism of active components of herbs. The CCK-8 assay was used to evaluate the proliferative activity of A549 cells treated with tanshinone IIA (2.5-80 μmol/L) for 24, 48 and 72 h, respectively. Flow cytometry was used for the detection of cell apoptosis and cell cycle perturbation. VEGF and VEGFR2 expression were studied by Western blotting. The binding mode of tanshinone IIA within the crystal structure of the VEGFR2 protein was evaluated with molecular docking analysis by use of the CDOCKER algorithm in Discovery Studio 2.1. The CCK-8 results showed that tanshinone IIA can significantly inhibit A549 cell proliferation in a dose- and time-dependent manner. Flow cytometry results showed that the apoptosis rate of tested group was higher than the vehicle control, and tanshinone IIA-treated cells accumulated at the S phase, which was higher than the vehicle control. Furthermore, the expression of VEGF and VEGFR2 was decreased in Western blot. Finally, molecular docking analysis revealed that tanshinone IIA could be stably docked into the kinase domain of VEGFR2 protein with its unique modes to form H-bonds with Cys917 and π-π stacking interactions with Val848. In conclusion, tanshinone IIA may suppress A549 proliferation, induce apoptosis and cell cycle arrest at the S phase. This drug may suppress angiogenesis by targeting the protein kinase domains of VEGF/VEGFR2.

RESUMEN

The combined effects of temperature and ammonia concentration on the percent fertilization and percent hatching in Crassostrea ariakensis were examined under laboratory conditions using the central composite design and response surface methodology. The results indicated: (1) The linear effects of temperature and ammonia concentration on the percent fertilization were significant (P<0.05), and the quadratic effects were highly significant (P<0.01). The interactive effect between temperature and ammonia concentration on the percent fertilization was not significant (P>0.05). (2) The linear effect of temperature on the percent hatching was highly significant (P<0.01), and that of ammonia concentration was nonsignificant (P>0.05). The quadratic effects of temperature and ammonia concentration on the percent hatching were highly significant (P<0.01). The interaction on the percent hatching was not significant (P>0.05). Temperature was more important than ammonia in influencing the fertilization and hatching in C. ariakensis. (3) The model equations of the percent fertilization and hatching towards temperature and ammonia concentration were established, with the coefficients of determination R(2)=99.4% and 99.76%, respectively. Through the lack-of-fit test, these models were of great adequacy. The predictive coefficients of determination for the two model equations were as high as 94.6% and 98.03%, respectively, showing that they could be used for practical projection. (4) Via the statistical simultaneous optimization technique, the optimal factor level combination, i.e., 25°C/0.038mgmL(-1), was derived, at which the greatest percent fertilization 95.25% and hatching 83.26% was achieved, with the desirability being 97.81%. Our results may provide advantageous guidelines for the successful reproduction of C. ariakensis.

Asunto(s)

RESUMEN

Objective To analyze the conding region of hantanvirus S gene and predict the structure of nucleoprotein for diagnostic antigen study.Methods RT-PCR was used to amplify the S gene of hantanvirus Hunan03 strain after designing specific primers.The amplification product was cloned into pGM-T vector and then the recombinant vector was transformed into E.coli TOP10,gene sequencing was carried out after blue-white selection and PCR screening for positive clones.The database of NCBI and Swiss-Prot/TrEMBL were used to predict and analyze the structure,biological characteristics and protein structures of S gene.Results The amplification product was about 1290 bp,the pGM-T/S vector was constructed and successfully sequenced,the whole length of the open reading frame (ORF) was composed of 1290 nucleotide residues,among them the GC content was 44.11％ and the AT content was 55.89％,it was composed of 429 amino acids (20 kinds),the accession number of the sequence submitted to GenBank was JN712306,its homology of nucleotides to the 76-118 strain was 83％ and the homology of amino acids was 98％,ten nonspecific variation sites were found.The grand average of hydropathicity was-0.405.There were three transmembrane domains and four non transmembrane domains in the secondary structure of nucleoprotein including 55％ of helix structure,6.1％ of sheet structure and 38.9％ of loop structure.Conclusion The bioinformatics analysis of Hunan03 strain S gene might be important for provide the substructure data to reveal the significance of S gene characteristics on hemorrhagic fever renal syndrome (HFRS) prevention and control.