Genome-wide identification and characterization of the WOX gene family in Brassica juncea / 生物工程学报

The WUSCHEL related-homeobox (WOX) family is one of the plant-specific transcription factor families, playing important roles in plant growth and development. In this study, 51 WOX gene family members were identified from the genome data of Brassica juncea by searching and screening with HUMMER, Smart and other software. Their protein molecular weight, amino acids numbers, and isoelectric point were analyzed by using Expasy online software. Furthermore, bioinformatics software was used to systematically analyze the evolutionary relationship, conservative region, and gene structure of the WOX gene family. The mustard WOX gene family was divided into three subfamilies: ancient clade, intermediate clade, and WUS clade/modern clade. Structural analysis showed that the type, organization form and gene structure of the conservative domain of WOX transcription factor family members in the same subfamily were highly consistent, while there was a certain diversity among different subfamilies. 51 WOX genes are distributed unevenly on 18 chromosomes of mustard. Most of the promoters of these genes contain cis acting elements related to light, hormone and abiotic stress. Using transcriptome data and real-time fluorescence quantitative PCR (qRT-PCR) analysis, it was found that the expression of mustard WOX gene was spatio-temporal specific, among which BjuWOX25, BjuWOX33, and BjuWOX49 might play an important role in the development of silique, and BjuWOX10, BjuWOX32, and BjuWOX11, BjuWOX23 respectively might play an important role in the response to drought and high temperature stresses. The above results may facilitate the functional study of mustard WOX gene family.

Identification and analysis of the TALE transcription factor family in radish / 生物工程学报

Three-amino acid loop extension (TALE) transcription factors play important roles in plant growth and cell differentiation. There are plenty of studies on TALE transcription factors in several model plants, but not in radish (Raphanus sativas). A genome-wide bioinformatics analysis identified 33 TALE family genes in the Xiang-Ya-Bai (XYB) radish, These genes, are distributed on nine chromosomes and all contain 4-6 exons. The 33 TALE genes in radish showed a co-linearity relationship with the 17 homologous genes in Arabidopsis thaliana. Moreover, a large number of stress response cis-elements were found in the promoter regions of these genes. Expression analysis showed that four genes in the BELL subfamily were highly expressed in roots, and two genes in the KNOX subfamily were highly expressed in shoots of bolting plants and callus. All radish TALE genes contain sequences encoding the conserved HOX domain, except for the gene RSA10037940, which is homologous to Arabidopsis KNATM. The deduced 3D structures of the TALE proteins irrespective of subtypes are highly similar. All the encoded proteins were weakly acidic and hydrophilic. The radish TALE gene family is relatively evolutionarily conserved, which was consistent with results from Arabidopsis, but quite different from that of rice. This study provides important clues for studying the biological functions of TALE transcription factors in radish.

Genipin cross-linked decellularized scaffold for allogenic transplantation in situ / 国际生物医学工程杂志

Objective To explored the bio-compatibility and cartilage regeneration of the rabbits genipin cross-linked decellularized scaffold, to provide experimental and theoretical support for the clinical application of genipin cross-linked decellularized scaffold. Methods Detergent-enzyme method was used to prepare decellularized tracheal scaffolds. Cellular content of native trachea and decellularized trachea were compared by 4', 6-diamidino-2-phenylindole(DAPI) staining. Masson trichrome staining was used to compare the histological structure of the progenitor tube, decellularized trachea, and genipin cross-linked decellularized trachea. Nine adult New Zealand white rabbits were randomly divided into autologous tracheal transplantation group (negative control group), allogeneic tracheal transplantation group (positive control group), and genipin cross-linked decellularized tracheal transplantation group (experimental group). Autologous bone marrow mesenchymal stem cells were implanted on the surface of trachea in each group. The blood cells and type II collagen were detected to compare the inflammatory response and chondrocyte regeneration after tracheal orthotopic transplantation in the three groups. Results After DAPI staining and light microscope observation (×200), the cell content of the acellular 7-cycle trachea [(143.0 ± 71.1) cells/field] was significantly lower than that of the native trachea [(853.5 ± 149.6) cells/ field], and the difference was statistically significant (P<0.001). Masson's trichrome staining showed that the tissue structure of genipin cross -linked decellularized trachea was more complete. Blood cell analysis and type II collagen test results showed that genipin cross-linked decellularized trachea transplanted with bone marrow mesenchymal stem cells after transplantation in situ has little rejection and can be converted into chondrocytes by the action of related growth factors in vivo. Conclusions Genipin cross-linked decellularized tracheal scaffold combined with stem cell transplantation can successfully construct a tracheal in situ replacement model. This study provides a strong support for the research of tissue engineering trachea.

Genipin cross-linked decellularized scaffold for allogenic transplantation in situ / 国际生物医学工程杂志

Objective@#To explored the bio-compatibility and cartilage regeneration of the rabbits genipin cross-linked decellularized scaffold, to provide experimental and theoretical support for the clinical application of genipin cross-linked decellularized scaffold.@*Methods@#Detergent-enzyme method was used to prepare decellularized tracheal scaffolds. Cellular content of native trachea and decellularized trachea were compared by 4′, 6-diamidino-2-phenylindole(DAPI) staining. Masson trichrome staining was used to compare the histological structure of the progenitor tube, decellularized trachea, and genipin cross-linked decellularized trachea. Nine adult New Zealand white rabbits were randomly divided into autologous tracheal transplantation group (negative control group), allogeneic tracheal transplantation group (positive control group), and genipin cross-linked decellularized tracheal transplantation group (experimental group). Autologous bone marrow mesenchymal stem cells were implanted on the surface of trachea in each group. The blood cells and type II collagen were detected to compare the inflammatory response and chondrocyte regeneration after tracheal orthotopic transplantation in the three groups.@*Results@#After DAPI staining and light microscope observation (×200), the cell content of the acellular 7-cycle trachea [(143.0 ± 71.1) cells/field] was significantly lower than that of the native trachea [(853.5 ± 149.6) cells/field], and the difference was statistically significant (P<0.001). Masson′s trichrome staining showed that the tissue structure of genipin cross-linked decellularized trachea was more complete. Blood cell analysis and type II collagen test results showed that genipin cross-linked decellularized trachea transplanted with bone marrow mesenchymal stem cells after transplantation in situ has little rejection and can be converted into chondrocytes by the action of related growth factors in vivo.@*Conclusions@#Genipin cross-linked decellularized tracheal scaffold combined with stem cell transplantation can successfully construct a tracheal in situ replacement model. This study provides a strong support for the research of tissue engineering trachea.

Clinical application of circRNA in non-small cell lung cancer / 国际外科学杂志

Lung cancer is one of the most common cancers in the world,which seriously affects people's physical and mental health.About 85％ of them are non-small cell lung cancers.In recent years,with the rapid development of low-dose computed tomography,Da Vinci robotic surgery and targeted therapy,the therapeutic effect of lung cancer has been greatly improved.However,due to the lack of early diagnosis of biomarkers,therapeutic targets and signs of prognosis,most patients have metastases when they are at the time of treatment.Lung cancer remains the leading cause of cancer-related death.CircRNA is a special endogenous non coding RNA,which is formed by the reverse splicing of the 3'splice donor site and the 5'splice acceptor site to form a covalent closed loop.It is highly conservative and stable.The expression level of circRNA in non-small cell lung cancer is obviously abnormal,which is closely related to the occurrence,development and metastasis of non-small cell lung cancer.It is expected to become an ideal biomarker,which is used for early diagnosis of non-small cell lung cancer,and provides new therapeutic targets and prognostic markers.

Role of Th1/Th2/Th17 cytokines in maintaining virological response after entecavir discontinuation in patients with chronic hepatitis B / 中华实验和临床病毒学杂志

Objective@#To explore the characteristics underlying Th1/Th2/Th17 expression level after entecavir (ETV) discontinuation of chronic hepatitis B (CHB) patients who were HBeAg-positive and define the role of Th1/Th2/Th17 in maintaining virological response after ETV discontinuation.@*Methods@#We selected 112 HBeAg positive CHB patients who met the withdrawal criteria according to the guideline of prevention and treatment of chronic hepatitis B (2010 version), and we also separated them into virology sustained response (SVR) group and virological relapse (VR) group according to the recurrence in 52 weeks. We detected serum level of Th1/Th2/h17 related cytokines during 0, 12, 24 and 52 weeks follow-up to further analyze their dynamic changes and expression differences.@*Results@#The results of the study reveals that serum levels of IFN-γ in the group of SVR were at a higher level compared with VR group during follow-up (all P<0.05). While, the serum level of IL-10 decreased in SVR group and was lower than the paired IL-10 level in VR group with significance during follow-up. In VR group, the serum level of IFN-γ decreased during the first 24 weeks after ETV withdrawal, and after then, the level rose. The serum levels of IFN-γ (Th1) in SVR patients were significantly higher than those in VR patients in the different follow-up time points after ETV discontinuation (all P<0.05). And the serum levels of IL-10 (Th2) in SVR patients were significantly lower than that in VR patients (all P<0.05). The comparison of serum levels of IL-17A (Th17) between the two groups had no significant difference (all P>0.005).@*Conclusions@#The serum level of IFN-γ in SVR group maintained a high level is conducive to maintaining virological response after ETV withdrawal and high level of IL-10 may be related to virologic relapse.

Application of ERAS in the perioperative period of lung cancer / 中华胸心血管外科杂志

With the rapid development of image technology , the detection rate of early lung cancer is higher and higher in the early stage of lung cancer with small lesions such as ground glass nodules ( GGO) and subcentimeter nodules( less than or e-qual to 1 cm).The traditional treatment of perioperative period is greatly challenged.At the same time, the occurrence of pul-monary embolism and the bad effect of analgesia can seriously influence the rehabilitation and quality of life of patients , reduce patient satisfaction and prolong hospital stay.Through the improvement of the perioperative measures , ERAS promote postoper-ative rehabilitation and improve the quality of life of patients.

Research progress of tissue-engineered tracheal re-epithelialization / 中华胸心血管外科杂志

Artificial tracheal grafts are required when repairing extensive tracheal defects that exceed 50％ of total length in adults and 30％ in infants.Alternative options for trachea replacement now are being developed,including autografts,allografts,and prosthetics,or a combination of these,but they have limitations including inflammation,infection.With the advancements made in tissue engineering (TE) in recent years,researchers are focusing their attention on using a tracheal scaffold made from a synthetic polymer or a cadaveric allotransplant.Considering the critical role of epithelium in the trachea,the repithelialization of tracheal grafts has gradually become the focus of tissue engineering tracheal reconstruction.This article will make a summary of the researches on the correlation of tissue-engineered tracheal re-epithelialization.

The correlation between interleukin-21 and the recurrence of chronic hepatitis B after entecavir discontinuation / 中华传染病杂志

Objective To study the correlation between interleukin(IL)-21 and the recurrence of chronic hepatitis B(CHB)in hepatitis B e antigen(HBeAg)-positive patients after discontinuation of entecavir(ETV).Methods A total of 112 HBeAg-positive CHB patients treated with ETV were enrolled.Serum levels of IL-21 at week 0,12,24 and 52 after ETV discontinuation were detected.The Cox regression model was used to analyze the correlation between IL-21 and the recurrence after ETV discontinuation.The receiver operating characteristic(ROC)curve was applied to determine the predictive value of IL-21 for CHB recurrence after ETV discontinuation.The expression differences of IL-21 were compared between sustained viral response(SVR)group and viral relapse(VR)group.The t test and Chi-square test were used for statistical analysis.Results The serum levels of IL-21 in SVR group at week 0,12,24 and 52 after ETV withdrawal were(60.0 ± 10.8),(60.2 ± 14.7),(60.6 ± 19.5)and (61.2 ± 15.4)ng/L,respectively,which were all significantly higher than those in VR group(47.5 ± 10.7),(47.3 ± 12.9),(46.9 ± 12.2)and(46.4 ± 12.8)ng/L,respectively(t=6.153,4.926,4.382 and 5.515,respectively,all P< 0.01).The area under curve(AUC)was 0.811(95% CI:0.728 ~0.893,P<0.01)and the best cut-off value of serum IL-21 level was 49.8 ng/L.The recurrence rates of patients with serum IL-21 level ≥49.8 ng/L and <49.8 ng/L at time of ETV withdrawal was 25.4%(16/63)and 77.6%(38/49),respectively.The difference was statistically significant(χ2=30.027,P<0.01).The serum IL-21 level at the time of drug withdrawal(P= 0.005),serum hepatitis B surface antigen(HBsAg)level at the time of HBeAg seroconversion(P= 0.008)and age(P= 0.016)were factors associated with CHB recurrence after ETV withdrawal by multivariate Cox model analysis.The serum levels of ALT,HBV DNA,HBeAg and HBsAg in SVR group were significantly lower than those of VR group at week 12,24 and 52 after ETV withdrawal(t= -5.968,-7.691,-8.093; -3.047,-9.477,-28.900;-2.872,-10.424,-18.330;-4.633,-4.030 and -5.032,respectively;all P<0.01).Serum level of IL-21 was negatively correlated with HBsAg in SVR group after ETV withdrawal (r= -0.241,P<0.01),while positively correlated with HBsAg in VR group(r=0.286,P<0.01). Conclusions The serum IL-21 level at the time of drug withdrawal is associated with the recurrence after ETV discontinuation.IL-2l may play an important role as an immunomodulatory factor in maintaining virological responses in HBeAg-positive CHB patients after ETV withdrawal.

Inhibitory effects of atractylenolide 3 on platelet and its mechanism / 国际药学研究杂志

Objective To study the effects of atractylenolide 3 on human platelet in vitro and explore the underlying mecha?nism. Methods The effects of atractylenolide 3 on human platelet aggregation induced by thrombus alkane analogues(U46619)was tested by turbidimetry in vitro. ATP secretion weas detected by luciferase detection,and the phosphorylation levels of Erk and Akt were detected by Western blotting. Results Atractylenolide 3 diminished U46619-induced human platelet aggregation in concentra?tion dependence. Compared with DMSO control group,the inhibitory rate were significant increased in each experiment group(P<0.01). Atractylenolide 3 inhibited adenosine triphosphate(ATP)secreted by human platclet in concentration dependence. Compared with the DMSO control group,the inhibitory rate were significant increased in each experiment group(P<0.01),and the levels of phospho-Akt(Ser473)and phospho-Erk1/2 were significant downregulated in the presence of atractylenolide 3 in each experiment group(P<0.01). Conclusion Atractylenolide 3 exhibits a concentration-dependent inhibitory effect on human platelet aggregation and secretion induced by U46619. Also,it regulated the MAPK and PI3K-Akt signaling pathways. These results show that atractyleno?lide 3 is an effective antiplatelet compound,may serve as new antithrombotic drugs.

Proximal femoral nail antirotationversus artificial femoral head replacement for intertrochanteric fracture in the elderly：a meta-analysis / 中国组织工程研究

BACKGROUND:Proximal femoral nail antirotation and femoral head replacement could quickly recover hip function in intertrochanteric fractures in the elderly, but whose efficacy is better remains controversial. OBJECTIVE:To compare the differences in the effects of proximal femoral nail antirotation and femoral head replacement on intertrochanteric fractures in the elderly by using a meta-analysis. METHODS:The relevant literatures were searched in PubMed, Cochrane, CNKI, Wanfang database and VIP, and other relevant journal such asChinese Journal of Orthopaedicsand Orthopedic Journal of Chinafor articles published in recent five years. Randomized controled trials concerning proximal femoral nail antirotation and femoral head replacement for the treatment of intertrochanteric fractures in the Chinese elderly were colected. Baseline data, operation time, intraoperative blood loss, postoperative out-of-bed time, length of stay, Harris score, complication rate and number of death were colected and processed using RevMan 5.30 software for meta analysis. RESULTS AND CONCLUSION:Totaly 37 clinical controled trials with 3 216 patients were recruited. Meta-analysis results showed that compared with femoral head replacement, proximal femoral nail antirotation was at a disadvantage in postoperative out-of-bed time, length of stay and joint function in the early stage. No significant difference in complication and mortality was detected between proximal femoral nail antirotation and femoral head replacement. However, proximal femoral nail antirotation had some advantages such as short operation time, smal trauma, and less intraoperative blood loss, and showed good midterm and long-term outcomes of joint function.

Elimination of Perfluorooctanoic Acid Interference from Liquid Chromatography System by Impurity Delay / 分析化学

A high performance liquid chromatography tandem mass spectrometric ( HPLC-MS/MS ) method was developed for the determination of seven perfluorinated alkyl acidin ( C4-C10 ) and perfluorooctane sulfonate in water. After the particulate was removed by leaching, surrogate standard was added, then the sample was loading to a pre-conditioned WAX cartridge for purification, and then the eluent was concentrated and analyzed by HPLC-MS/MS. Due to the situation that the fluoride polymer was unavoidable to be used in the LC system, a delay column was employed and the perfluorooctanoic acid ( PFOA ) of interference was departed from the PFOA in sample. The method detection limit ( MDL) of PFOA was 0. 8 ng/L, and the lowest quantitative concentration (LQC) was 3. 2 ng/L. For other compounds, the MDL was ranged from 0. 2 to 1. 2 ng/L, and the LQC was 0. 8-4. 8 ng/L. This method also had good reproducibility, for six duplicated samples, the relative standard deviations ( RSD ) of all target compounds were less than 16%. And the recoveries of target compounds at six spiked matrix samples ranged from 87% to 129%, and the RSD were less than 15%. Because of the connection of delay column, the background was well controlled, and a relatively lower MDL were obtained.

Hepatocyte transplantation for treatment of hepatic failure / 中国组织工程研究

Cell therapy refers to a method that transplants stem cells or differentiated functioning cells into diseased regions to compensate the losing functions of diseased cells or uses the stem cells for treatment of diseases after in vitro genetic manipulation. After more than 30 years of study, great progress in hepatocyte transplantation technique has been acquired. This technique can acquire in situ liver transplantation effects. Hepatocyte transplantation, as an effective method for treatment of fulminant hepatic failure, has been widely confirmed in the animal model experiments and clinical practice. In addition, application of remedial hepatic stem cells can solve the problems regarding the source, number and immune rejection of hepatocytes, and offers a wide prospect for treatment of acute and chronic liver diseases. There are many problems about the study on hepatic stem cells. Up to date, many manuscripts addressing animal hepatic stem cell transplantation have been found, but few of them focus on the case report of treatment of liver disease by hepatocyte transplantation. Therefore, study on hepatic stem cells is still in its initial stage. The study methods should be developed and improved.

Splanchnic hemodynamic changes after liver transplantation for patients with cirrhosis / 中国普通外科杂志

0.05). PBF was still increased more then normal values 1 years after OLT(P

Postoperatiive renal hemodynamic in orthotopic liver transplant recipents / 中国普通外科杂志

Objective To investigate the renal hemodynamic changes after orthotopic liver transplantation(OLT)and the correlative parameters. Methods In 20 patients undergoing OLT for cirrhosis,the following renal arterial resistance index(RI) was measured before surgery and 7days,30days, 6 months and 1 year after operation by using color Doppler flow imaging(CDFI) and serum creatinine detection.Meanwhile the same parameters were measured in 10 healthy as controls. Results Both RI and serum Cr rised after OLT ( P 0.05). Conclusions Most alteration of renal hemodynamic parameters in cirrhosis are restored to normal after OLT in 1 year. Preoperative renal abnormalities and intraopterative alteration of hemodynamic may contribute to postoperative renal dysfunction. Cyclosporine (CsA) is the most likely etiologic agent of postoperative renal dysfunction.