Objective To eliminate the side effects of aluminum adjuvant and His-tag,we constructed chimeric VLPs displaying the epitope of EV71(SP70) without His-tagged.Then evaluating whether the VLPs could efficiently evoke ...Objective To eliminate the side effects of aluminum adjuvant and His-tag,we constructed chimeric VLPs displaying the epitope of EV71(SP70) without His-tagged.Then evaluating whether the VLPs could efficiently evoke not only humoral but also cellular immune responses against EV71 without adjuvant.Methods The fusion protein was constructed by inserting SP70 into the MIR of truncated HBc Ag sequence,expressed in E.Coli,and purified through ion exchange chromatography and density gradient centrifugation.Mice were immunized with the VLPs and sera were collected afterwards.The specific antibody titers,Ig G subtypes and neutralizing efficacy were detected by ELISA,neutralization assay,and EV71 lethal challenge.IFN-γ and IL-4 secreted by splenocytes were tested by ELISPOT assay.Results HBc-SP70 proteins can self-assemble into empty VLPs.After immunization with HBc-SP70 VLPs,the detectable anti-EV71 antibodies were effective in neutralizing EV71 and protected newborn mice from EV71 lethal challenge.There was no significant difference for the immune efficacy whether the aluminum adjuvant was added or not.The specific Ig G subtypes were mainly IgG1 and IgG2 b and splenocytes from the mice immunized produced high levels of IFN-γ and IL-4.Conclusion The fusion proteins without His-tagged was expressed and purified as soluble chimeric HBc-SP70 VLPs without renaturation.In the absence of adjuvant,they were efficient to elicit high levels of Th1/Th2 mixed immune response as well as assisted by aluminum adjuvant.Furthermore,the chimeric VLPs have potential to prevent HBV and EV71 infection simultaneously.展开更多
Objective Combination immunotherapy strategies targeting OX40,a co-stimulatory molecule that can enhance antitumor immunity by modulating the proliferation,differentiation,and effector function of tumor-infiltrating T...Objective Combination immunotherapy strategies targeting OX40,a co-stimulatory molecule that can enhance antitumor immunity by modulating the proliferation,differentiation,and effector function of tumor-infiltrating T cells,have attracted much attention for their excellent therapeutic effects.In this study,we aimed to evaluate the antitumor efficacy of combined anti-OX40 and hepatitis B core viruslike particles(HBc VLPs)therapy using a mouse colon cancer model.Methods Humanized B-h OX40 mice were injected subcutaneously with MC38 colon tumor cells and treated with HBc VLPs+anti-h OX40 antibody.Tumor growth was monitored.Flow cytometric analysis was performed to evaluate the populations of T cell subsets in the tumors.Results The combination of anti-OX40 with HBc VLPs resulted in a significant delay in tumor growth,suggesting that a potent antitumor immunity was induced by the combination therapy.Further studies revealed that HBc VLPs+anti-OX40 treatment induced a significant increase in effector T cells(Teffs)and a significant decrease in regulatory T cells(Tregs)in the tumor microenvironment(TME),which accounted for the synergistic antitumor effect of anti-OX40 in combination with HBc VLPs.Conclusion Combination therapy of anti-h OX40 and HBc VLPs provides synergistic antitumor activity in colon cancer-bearing mice,which may represent a potential design strategy for cancer immunotherapy.展开更多
Acute myocardial infarction (AMI) has been associated with poor prognosis,even after revascularization with percutaneous coronary intervention (PCI),likely due to coronary endothelial cell dysfunction and injury.^([1,...Acute myocardial infarction (AMI) has been associated with poor prognosis,even after revascularization with percutaneous coronary intervention (PCI),likely due to coronary endothelial cell dysfunction and injury.^([1,2])Endothelin-1 (ET-1),a peptide that serves as a vasoconstrictor of smooth muscle cell proliferation,can reflect endothelial cell functional states.Due to low circulation levels and short plasma half-life time,measuring plasma ET-1 levels is difficult.In contrast,big ET-1.展开更多
As traced by the Big Bang theory,the starting point of the universe,is called the“Singularity”in Da Ci Hai,an unabridged,comprehensive dictionary.According to cosmological reasoning,the singularity has an infinite d...As traced by the Big Bang theory,the starting point of the universe,is called the“Singularity”in Da Ci Hai,an unabridged,comprehensive dictionary.According to cosmological reasoning,the singularity has an infinite density of matter,an infinite curvature of space and time,and it is invisible and infinite.These characteristics are analogous to the human imagination at the level of innovation.For the innovation of cosmetic raw materials,there is also the possibility of infinite evolution.For example,in recent years,the scientific research in cosmetic industry the for promoting upgrade in raw materials is quite proactive.From the raw material enterprises,down to the brand company,the investment in raw material innovation is also strengthened at a visible rate.展开更多
Our previous studies have shown that long noncoding RNA(lncRNA)H19 is upregulated in injured rat sciatic nerve during the process of Wallerian degeneration,and that it promotes the migration of Schwann cells and slows...Our previous studies have shown that long noncoding RNA(lncRNA)H19 is upregulated in injured rat sciatic nerve during the process of Wallerian degeneration,and that it promotes the migration of Schwann cells and slows down the growth of dorsal root ganglion axons.However,the mechanism by which lncRNA H19 regulates neural repair and regeneration after peripheral nerve injury remains unclear.In this study,we established a Sprague-Dawley rat model of sciatic nerve transection injury.We performed in situ hybridization and found that at 4–7 days after sciatic nerve injury,lncRNA H19 was highly expressed.At 14 days before injury,adeno-associated virus was intrathecally injected into the L4–L5 foramina to disrupt or overexpress lncRNA H19.After overexpression of lncRNA H19,the growth of newly formed axons from the sciatic nerve was inhibited,whereas myelination was enhanced.Then,we performed gait analysis and thermal pain analysis to evaluate rat behavior.We found that lncRNA H19 overexpression delayed the recovery of rat behavior function,whereas interfering with lncRNA H19 expression improved functional recovery.Finally,we examined the expression of lncRNA H19 downstream target SEMA6D,and found that after lncRNA H19 overexpression,the SEMA6D protein level was increased.These findings suggest that lncRNA H19 regulates peripheral nerve degeneration and regeneration through activating SEMA6D in injured nerves.This provides a new clue to understand the role of lncRNA H19 in peripheral nerve degeneration and regeneration.展开更多
BACKGROUND:To investigate the most appropriate dual antiplatelet therapy(DAPT)duration for patients with acute coronary syndrome(ACS)after drug-eluting stent(DES)implantation in the largest cardiovascular center of Ch...BACKGROUND:To investigate the most appropriate dual antiplatelet therapy(DAPT)duration for patients with acute coronary syndrome(ACS)after drug-eluting stent(DES)implantation in the largest cardiovascular center of China.METHODS:We enrolled 5,187 consecutive patients with ACS who received DES from January to December 2013.Patients were divided into four groups based on DAPT duration:standard DAPT group(11-13 months,n=1,568)and prolonged DAPT groups(13-18 months[n=308],18-24 months[n=2,125],and>24 months[n=1,186]).Baseline characteristics and 5-year clinical outcomes were recorded.RESULTS:Baseline characteristics were similar across the four groups.Among the four groups,those with prolonged DAPT(18-24 months)had the lowest incidence of major adverse cardiovascular and cerebrovascular events(MACCEs)(14.1%vs.11.7%vs.9.6%vs.24.2%,P<0.001),all-cause death(4.8%vs.3.9%vs.2.1%vs.2.6%,P<0.001),cardiac death(3.1%vs.2.6%vs.1.4%vs.1.9%,P=0.004),and myocardial infarction(MI)(3.8%vs.4.2%vs.2.5%vs.5.8%,P<0.001).The incidence of bleeding was not different among the four groups(9.9%vs.9.4%vs.11.0%vs.9.4%,P=0.449).Cox multivariable analysis showed that prolonged DAPT(18-24 months)was an independent protective factor for MACCEs(hazard ratio[HR]0.802,95%confidence interval[CI]0.729-0.882,P<0.001),all-cause death(HR 0.660,95%CI 0.547-0.795,P<0.001),cardiac death(HR 0.663,95%CI 0.526-0.835,P<0.001),MI(HR 0.796,95%CI 0.662-0.957,P=0.015),and target vessel revascularization(HR 0.867,95%CI 0.755-0.996,P=0.044).Subgroup analysis for high bleeding risk showed that prolonged DAPT remained an independent protective factor for all-cause death and MACCEs.CONCLUSION:For patients with ACS after DES,appropriately prolonging the DAPT duration may be associated with a reduced risk of adverse ischemic events without increasing the bleeding risk.展开更多
OBJECTIVE To investigate the optimal duration of dual antiplatelet therapy(DAPT)in patients with diabetes mellitus(DM)requiring complex percutaneous coronary intervention(PCI).METHODS A total of 2403 patients with DM ...OBJECTIVE To investigate the optimal duration of dual antiplatelet therapy(DAPT)in patients with diabetes mellitus(DM)requiring complex percutaneous coronary intervention(PCI).METHODS A total of 2403 patients with DM who underwent complex PCI from January to December 2013 were consecutively enrolled in this observational cohort study and divided according to DAPT duration into a standard group(11-13 months,n=689)and two prolonged groups(13-24 months,n=1133;>24 months,n=581).RESULTS Baseline characteristics,angiographic findings,and complexity of PCI were comparable regardless of DAPT duration.The incidence of major adverse cardiac and cerebrovascular event was lower when DAPT was 13-24 months than when it was 11-13 months or>24 months(4.6%vs.8.1%vs.6.0%,P=0.008),as was the incidence of all-cause death(1.9%vs.4.6%vs.2.2%,P=0.002)and cardiac death(1.0%vs.3.0%vs.1.2%,P=0.002).After adjustment for confounders,DAPT for 13-24 months was associated with a lower risk of major adverse cardiac and cerebrovascular event[hazard ratio(HR)=0.544,95%CI:0.373-0.795]and all-cause death(HR=0.605,95%CI:0.387-0.944).DAPT for>24 months was associated with a lower risk of all-cause death(HR=0.681,95%CI:0.493-0.942)and cardiac death(HR=0.620,95%CI:0.403-0.952).The risk of major bleeding was not increased by prolonging DAPT to 13-24 months(HR=1.356,95%CI:0.766-2.401)or>24 months(HR=0.967,95%CI:0.682-1.371).CONCLUSIONS For patients with DM undergoing complex PCI,prolonging DAPT might improve the long-term prognosis by reducing the risk of adverse ischemic events without increasing the bleeding risk.展开更多
BACKGROUND Lugol chromoendoscopy(LCE)has served as a standard screening technique in high-risk patients with esophageal cancer.Nevertheless,LCE is not suitable for general population screening given its side effects.L...BACKGROUND Lugol chromoendoscopy(LCE)has served as a standard screening technique in high-risk patients with esophageal cancer.Nevertheless,LCE is not suitable for general population screening given its side effects.Linked color imaging(LCI)is a novel image-enhanced endoscopic technique that can distinguish subtle differences in mucosal color.AIM To compare the diagnostic performance of LCI with LCE in detecting esophageal squamous cell cancer and precancerous lesions and to evaluate whether LCE can be replaced by LCI in detecting esophageal neoplastic lesions.METHODS In this prospective study,we enrolled 543 patients who underwent white light imaging(WLI),LCI and LCE successively.We compared the sensitivity and specificity of LCI and LCE in the detection of esophageal neoplastic lesions.Clinicopathological features and color analysis of lesions were assessed.RESULTS In total,43 patients(45 neoplastic lesions)were analyzed.Among them,36 patients(38 neoplastic lesions)were diagnosed with LCI,and 39 patients(41 neoplastic lesions)were diagnosed with LCE.The sensitivity of LCI was similar to that of LCE(83.7%vs 90.7%,P=0.520),whereas the specificity of LCI was greater than that of LCE(92.4%vs 87.0%,P=0.007).The LCI procedure time in the esophageal examination was significantly shorter than that of LCE[42(34,50)s vs 160(130,189)s,P<0.001].The color difference between the lesion and surrounding mucosa in LCI was significantly greater than that observed with WLI.However,the color difference in LCI was similar in different pathological types of esophageal squamous cell cancer.CONCLUSION LCI offers greater specificity than LCE in the detection of esophageal squamous cell cancer and precancerous lesions,and LCI represents a promising screening strategy for general populations.展开更多
As a direct wide bandgap semiconductor,CsPbCl_(3)has great potential applications in the eld of near-ultraviolet photodetectors,lasers and higher-order multiphoton uores-cent detectors.In this work,we synthesized CsPb...As a direct wide bandgap semiconductor,CsPbCl_(3)has great potential applications in the eld of near-ultraviolet photodetectors,lasers and higher-order multiphoton uores-cent detectors.In this work,we synthesized CsPbCl_(3)micro/nanocrystals by vapor depo-sition method with CsCl and PbCl_(2)powders as the source materials.It was con rmed that the formation of CsPbCl_(3)perovskite through the chemical reaction of CsCl with PbCl_(2)occurred in the quartz boat before the source evaporation,not in vapor or on sub-strate surface.The evaporated CsPbCl_(3)can form micro/nanocrystals on substrate surfaces under appropriate conditions.Various morphologies including irregular polyhedrons,rods and pyramids could be observed at lower temperature,while stable and uniform CsPbCl_(3)single crystal microplatelets were controllably synthesized at 450℃.Prolonging the growth time could modulate the size and density of the microcrystals,but could not change the morphology.Substrate types made little di erence to the morphology of CsPbCl_(3)crystals.The photoluminescence spectra indicated that the crystallinity and morphology of CsPbCl_(3)micro/nanocrystals have signi cant e ects on their optical properties.The work is expected to be helpful to the development of optoelectronic devices based on individual CsPbCl_(3)microcrystal.展开更多
BACKGROUND Per-oral endoscopic myotomy(POEM)is emerging as a prefer treatment option for pediatric achalasia.However,data are limited on the long-term efficacy of POEM in children and adolescents with achalasia.AIM To...BACKGROUND Per-oral endoscopic myotomy(POEM)is emerging as a prefer treatment option for pediatric achalasia.However,data are limited on the long-term efficacy of POEM in children and adolescents with achalasia.AIM To evaluate the safety and long-term efficacy of POEM for pediatric patients with achalasia and compare those outcomes with adult patients.METHODS This retrospective cohort study was conducted in patients with achalasia who underwent POEM.Patients aged under 18 years were included in the pediatric group;patients aged between 18 to 65 years who underwent POEM in the same period were assigned to the control group.For investigation of long-term followup,the pediatric group were matched with patients from the control group in a 1:1 ratio.The procedure-related parameters,adverse events,clinical success,gastroesophageal reflux disease(GERD)after POEM,and quality of life(QoL)were evaluated.RESULTS From January 2012 to March 2020,POEM was performed in 1025 patients aged under 65 years old(48 in the pediatric group,1025 in the control group).No significant differences were observed in the occurrence of POEM complications between the two groups(14.6%vs 14.6%;P=0.99).Among the 34 pediatric patients(70.8%)who underwent follow-up for 5.7 years(range 2.6-10.6 years),clinical success was achieved in 35 patients(35/36;97.2%).No differences were observed in post-POEM GERD occurrence(17.6%vs 35.3%;P=0.10).QoL was significantly improved in both groups after POEM.CONCLUSION POEM is safe and effective for pediatric patients with achalasia.It can achieve significant symptoms relief and improve QoL.展开更多
新一代的三维视频编码标准——3D-HEVC (3D High Efficient Video Coding)为了显著减少视点个数,增加了包含视频场景几何信息的深度图像,但深度图像编码的计算复杂度非常高,其编码时间是彩色图像的4倍左右。为了降低深度图像编码的计算...新一代的三维视频编码标准——3D-HEVC (3D High Efficient Video Coding)为了显著减少视点个数,增加了包含视频场景几何信息的深度图像,但深度图像编码的计算复杂度非常高,其编码时间是彩色图像的4倍左右。为了降低深度图像编码的计算复杂度,文中提出了一种基于纹理特征分析的深度图像帧内编码单元(CU)快速划分算法。首先,对深度图像的编码树单元(CTU)进行初级纹理特征分析,根据深度图像的纹理变化特征,在大津法的基础上对全局灰度进行分级,再通过判断CTU内采样点的纹理复杂度以及纹理方向标识来确定当前CTU的划分趋势。然后,对纹理复杂度高的CTU进行CU级别的精细纹理特征分析,利用CU内部像素分布的统计特征,自底向上计算不同尺寸的CU的纹理划分标识。最后,根据CTU的纹理复杂度、纹理方向标识以及CU的纹理划分标识预测当前CTU的划分深度范围,并判断是否提前终止CU划分。实验结果表明,与3D-HEVC参考模型中的原始算法相比,所提算法在平均增加0.8%左右码率的同时,能够降低45%左右的编码时间,同时保持了良好的编码率失真性能;与现有的3种快速算法相比,所提算法在整体序列上分别降低了约12%,3%,4%的编码时间,而在大分辨率序列上则分别降低了14%,11%,10%的编码时间,并具有相近的编码率失真性能。展开更多
Objective:To observe effect of alprostadil combined with Diammonium glycyrrhizinate on renal interstitial fibrosis in SD rate.Methods:A total of 75 SD rate were randomly divided into A,B,C,D,E groups with 15 in each g...Objective:To observe effect of alprostadil combined with Diammonium glycyrrhizinate on renal interstitial fibrosis in SD rate.Methods:A total of 75 SD rate were randomly divided into A,B,C,D,E groups with 15 in each group.Rats in group A served as the control group received just only but tissue separation without modeling operation,while model of unilateral ureteral obstruction(UUO) was established in B,C,D,E groups.Rats in A,B group were given saline lavage placebo treatment,while rats in C,D,E groups were given dianunonium glycyrrhizinate and alprostadil injection.Five rats were sacrificed 1,2,3 weeks after modeling,serum creatinine level of femoral venous blood was determined.Transforming growth factor- β1(TCF- β1) and concentration of connective tissue growth factor(CTGF) were also detected by using ELISA.Line renal interstitial tissue was taken after HE staining,renal interstitial TGF- β1 and CTGF expression were detected by using immunohistochemical method.Results:Serum creatinine levels of B,C,D,E group at different time points in were significantly higher than that of group A(P<0.05);serum creatinine levels in group B were significantly higher than that of C,D,E group at each time point(P<0.05).Serum creatinine level of Croup E was significantly lower than C,D group after 2,3 weeks(P<0.05).Rate in A group at each time point showed no significant changes in TGF- β1 and CREA concentration in serum and kidney tissues(P>0.05);while serum and kidney tissue TGF- β1,concentration of CREA.expression of rats in B,C,D,E groups showed a gradual increasing trend over time.TCF- β1 and CREF of Group B in serum and kidney tissues at each time point were significantly higher than that of the other groups(P<0.05).TCF- β1 and CREF of Group E in serum and kidney tissues at each time point were significantly lower than that of B,C,D group at all time points in serum and kidney tissues(P<0.05).Conclusions:Alprostadil combined with diammonium glycyrrhizinate can significantly lower the expression of TGF- β1 and CTGF in serum and tissues of SD rat with renal interstitial fibrosis,thus inhibit rat renal interstitial fibrosis process.It has synergy protective effect.展开更多
基金supported by the National Science-technology Support Plan Projects 'The development of EV71 genetic engineering vaccine'[2008BAI69B02]
文摘Objective To eliminate the side effects of aluminum adjuvant and His-tag,we constructed chimeric VLPs displaying the epitope of EV71(SP70) without His-tagged.Then evaluating whether the VLPs could efficiently evoke not only humoral but also cellular immune responses against EV71 without adjuvant.Methods The fusion protein was constructed by inserting SP70 into the MIR of truncated HBc Ag sequence,expressed in E.Coli,and purified through ion exchange chromatography and density gradient centrifugation.Mice were immunized with the VLPs and sera were collected afterwards.The specific antibody titers,Ig G subtypes and neutralizing efficacy were detected by ELISA,neutralization assay,and EV71 lethal challenge.IFN-γ and IL-4 secreted by splenocytes were tested by ELISPOT assay.Results HBc-SP70 proteins can self-assemble into empty VLPs.After immunization with HBc-SP70 VLPs,the detectable anti-EV71 antibodies were effective in neutralizing EV71 and protected newborn mice from EV71 lethal challenge.There was no significant difference for the immune efficacy whether the aluminum adjuvant was added or not.The specific Ig G subtypes were mainly IgG1 and IgG2 b and splenocytes from the mice immunized produced high levels of IFN-γ and IL-4.Conclusion The fusion proteins without His-tagged was expressed and purified as soluble chimeric HBc-SP70 VLPs without renaturation.In the absence of adjuvant,they were efficient to elicit high levels of Th1/Th2 mixed immune response as well as assisted by aluminum adjuvant.Furthermore,the chimeric VLPs have potential to prevent HBV and EV71 infection simultaneously.
基金supported by National Major Science and Technology Projects of China 2017ZX10105015-001-002。
文摘Objective Combination immunotherapy strategies targeting OX40,a co-stimulatory molecule that can enhance antitumor immunity by modulating the proliferation,differentiation,and effector function of tumor-infiltrating T cells,have attracted much attention for their excellent therapeutic effects.In this study,we aimed to evaluate the antitumor efficacy of combined anti-OX40 and hepatitis B core viruslike particles(HBc VLPs)therapy using a mouse colon cancer model.Methods Humanized B-h OX40 mice were injected subcutaneously with MC38 colon tumor cells and treated with HBc VLPs+anti-h OX40 antibody.Tumor growth was monitored.Flow cytometric analysis was performed to evaluate the populations of T cell subsets in the tumors.Results The combination of anti-OX40 with HBc VLPs resulted in a significant delay in tumor growth,suggesting that a potent antitumor immunity was induced by the combination therapy.Further studies revealed that HBc VLPs+anti-OX40 treatment induced a significant increase in effector T cells(Teffs)and a significant decrease in regulatory T cells(Tregs)in the tumor microenvironment(TME),which accounted for the synergistic antitumor effect of anti-OX40 in combination with HBc VLPs.Conclusion Combination therapy of anti-h OX40 and HBc VLPs provides synergistic antitumor activity in colon cancer-bearing mice,which may represent a potential design strategy for cancer immunotherapy.
基金National Clinical Research Center for Cardiovascular Diseases,Fuwai Hospital,Chinese Academy of Medical Sciences(NCRC2020013)CAMS Innovation Fund for Medical Sciences(2020-I2M-C&T-B-049)。
文摘Acute myocardial infarction (AMI) has been associated with poor prognosis,even after revascularization with percutaneous coronary intervention (PCI),likely due to coronary endothelial cell dysfunction and injury.^([1,2])Endothelin-1 (ET-1),a peptide that serves as a vasoconstrictor of smooth muscle cell proliferation,can reflect endothelial cell functional states.Due to low circulation levels and short plasma half-life time,measuring plasma ET-1 levels is difficult.In contrast,big ET-1.
文摘As traced by the Big Bang theory,the starting point of the universe,is called the“Singularity”in Da Ci Hai,an unabridged,comprehensive dictionary.According to cosmological reasoning,the singularity has an infinite density of matter,an infinite curvature of space and time,and it is invisible and infinite.These characteristics are analogous to the human imagination at the level of innovation.For the innovation of cosmetic raw materials,there is also the possibility of infinite evolution.For example,in recent years,the scientific research in cosmetic industry the for promoting upgrade in raw materials is quite proactive.From the raw material enterprises,down to the brand company,the investment in raw material innovation is also strengthened at a visible rate.
基金supported by the National Natural Science Foundation of China,Nos.31971277(to DBY),31950410551(to DBY)Scientific Research Foundation for Returned Scholars,Ministry of Education of China(to DBY)+2 种基金a project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)(to DBY)the Postgraduate Research&Practice Innovation Program of Jiangsu Province of China,No.KYCX 19-2050(to JS)Jiangsu College Students’Innovation and Entrepreneurship Training Program,No.202213993005Y(to YY)。
文摘Our previous studies have shown that long noncoding RNA(lncRNA)H19 is upregulated in injured rat sciatic nerve during the process of Wallerian degeneration,and that it promotes the migration of Schwann cells and slows down the growth of dorsal root ganglion axons.However,the mechanism by which lncRNA H19 regulates neural repair and regeneration after peripheral nerve injury remains unclear.In this study,we established a Sprague-Dawley rat model of sciatic nerve transection injury.We performed in situ hybridization and found that at 4–7 days after sciatic nerve injury,lncRNA H19 was highly expressed.At 14 days before injury,adeno-associated virus was intrathecally injected into the L4–L5 foramina to disrupt or overexpress lncRNA H19.After overexpression of lncRNA H19,the growth of newly formed axons from the sciatic nerve was inhibited,whereas myelination was enhanced.Then,we performed gait analysis and thermal pain analysis to evaluate rat behavior.We found that lncRNA H19 overexpression delayed the recovery of rat behavior function,whereas interfering with lncRNA H19 expression improved functional recovery.Finally,we examined the expression of lncRNA H19 downstream target SEMA6D,and found that after lncRNA H19 overexpression,the SEMA6D protein level was increased.These findings suggest that lncRNA H19 regulates peripheral nerve degeneration and regeneration through activating SEMA6D in injured nerves.This provides a new clue to understand the role of lncRNA H19 in peripheral nerve degeneration and regeneration.
基金supported by the National High Level Hospital Clinical Research Funding(2022-GSP-QN-1)the National Clinical Research Center for Cardiovascular Diseases,Fuwai Hospital,Chinese Academy of Medical Sciences(NCRC2020013)+1 种基金the National Natural Science Foundation of China(81900323)China International Exchange and Promotion Association for Medical and Healthcare Investigator Sponsored Study(CN174125,DIREGL08735-DAPT)。
文摘BACKGROUND:To investigate the most appropriate dual antiplatelet therapy(DAPT)duration for patients with acute coronary syndrome(ACS)after drug-eluting stent(DES)implantation in the largest cardiovascular center of China.METHODS:We enrolled 5,187 consecutive patients with ACS who received DES from January to December 2013.Patients were divided into four groups based on DAPT duration:standard DAPT group(11-13 months,n=1,568)and prolonged DAPT groups(13-18 months[n=308],18-24 months[n=2,125],and>24 months[n=1,186]).Baseline characteristics and 5-year clinical outcomes were recorded.RESULTS:Baseline characteristics were similar across the four groups.Among the four groups,those with prolonged DAPT(18-24 months)had the lowest incidence of major adverse cardiovascular and cerebrovascular events(MACCEs)(14.1%vs.11.7%vs.9.6%vs.24.2%,P<0.001),all-cause death(4.8%vs.3.9%vs.2.1%vs.2.6%,P<0.001),cardiac death(3.1%vs.2.6%vs.1.4%vs.1.9%,P=0.004),and myocardial infarction(MI)(3.8%vs.4.2%vs.2.5%vs.5.8%,P<0.001).The incidence of bleeding was not different among the four groups(9.9%vs.9.4%vs.11.0%vs.9.4%,P=0.449).Cox multivariable analysis showed that prolonged DAPT(18-24 months)was an independent protective factor for MACCEs(hazard ratio[HR]0.802,95%confidence interval[CI]0.729-0.882,P<0.001),all-cause death(HR 0.660,95%CI 0.547-0.795,P<0.001),cardiac death(HR 0.663,95%CI 0.526-0.835,P<0.001),MI(HR 0.796,95%CI 0.662-0.957,P=0.015),and target vessel revascularization(HR 0.867,95%CI 0.755-0.996,P=0.044).Subgroup analysis for high bleeding risk showed that prolonged DAPT remained an independent protective factor for all-cause death and MACCEs.CONCLUSION:For patients with ACS after DES,appropriately prolonging the DAPT duration may be associated with a reduced risk of adverse ischemic events without increasing the bleeding risk.
基金supported by the National High Level Hospital Clinical Research Fund(2022-GSP-QN-1)the Young Talent Program of the Academician Fund(YS-2022-002)+1 种基金the National Key Research and Development Program of China(2016YFC130130&2016YFC1301301)the National Clinical Research Center for Cardiovascular Diseases,Fuwai Hospital,Chinese Academy of Medical Sciences(NCRC2020013).
文摘OBJECTIVE To investigate the optimal duration of dual antiplatelet therapy(DAPT)in patients with diabetes mellitus(DM)requiring complex percutaneous coronary intervention(PCI).METHODS A total of 2403 patients with DM who underwent complex PCI from January to December 2013 were consecutively enrolled in this observational cohort study and divided according to DAPT duration into a standard group(11-13 months,n=689)and two prolonged groups(13-24 months,n=1133;>24 months,n=581).RESULTS Baseline characteristics,angiographic findings,and complexity of PCI were comparable regardless of DAPT duration.The incidence of major adverse cardiac and cerebrovascular event was lower when DAPT was 13-24 months than when it was 11-13 months or>24 months(4.6%vs.8.1%vs.6.0%,P=0.008),as was the incidence of all-cause death(1.9%vs.4.6%vs.2.2%,P=0.002)and cardiac death(1.0%vs.3.0%vs.1.2%,P=0.002).After adjustment for confounders,DAPT for 13-24 months was associated with a lower risk of major adverse cardiac and cerebrovascular event[hazard ratio(HR)=0.544,95%CI:0.373-0.795]and all-cause death(HR=0.605,95%CI:0.387-0.944).DAPT for>24 months was associated with a lower risk of all-cause death(HR=0.681,95%CI:0.493-0.942)and cardiac death(HR=0.620,95%CI:0.403-0.952).The risk of major bleeding was not increased by prolonging DAPT to 13-24 months(HR=1.356,95%CI:0.766-2.401)or>24 months(HR=0.967,95%CI:0.682-1.371).CONCLUSIONS For patients with DM undergoing complex PCI,prolonging DAPT might improve the long-term prognosis by reducing the risk of adverse ischemic events without increasing the bleeding risk.
基金Supported by the National Natural Science Foundation of China,No.81270564 and 82100697.
文摘BACKGROUND Lugol chromoendoscopy(LCE)has served as a standard screening technique in high-risk patients with esophageal cancer.Nevertheless,LCE is not suitable for general population screening given its side effects.Linked color imaging(LCI)is a novel image-enhanced endoscopic technique that can distinguish subtle differences in mucosal color.AIM To compare the diagnostic performance of LCI with LCE in detecting esophageal squamous cell cancer and precancerous lesions and to evaluate whether LCE can be replaced by LCI in detecting esophageal neoplastic lesions.METHODS In this prospective study,we enrolled 543 patients who underwent white light imaging(WLI),LCI and LCE successively.We compared the sensitivity and specificity of LCI and LCE in the detection of esophageal neoplastic lesions.Clinicopathological features and color analysis of lesions were assessed.RESULTS In total,43 patients(45 neoplastic lesions)were analyzed.Among them,36 patients(38 neoplastic lesions)were diagnosed with LCI,and 39 patients(41 neoplastic lesions)were diagnosed with LCE.The sensitivity of LCI was similar to that of LCE(83.7%vs 90.7%,P=0.520),whereas the specificity of LCI was greater than that of LCE(92.4%vs 87.0%,P=0.007).The LCI procedure time in the esophageal examination was significantly shorter than that of LCE[42(34,50)s vs 160(130,189)s,P<0.001].The color difference between the lesion and surrounding mucosa in LCI was significantly greater than that observed with WLI.However,the color difference in LCI was similar in different pathological types of esophageal squamous cell cancer.CONCLUSION LCI offers greater specificity than LCE in the detection of esophageal squamous cell cancer and precancerous lesions,and LCI represents a promising screening strategy for general populations.
基金supported by the National Natu-ral Science Foundation of China(No.11575187)the National Key Research and Development Program(No.2016YFB0700205).
文摘As a direct wide bandgap semiconductor,CsPbCl_(3)has great potential applications in the eld of near-ultraviolet photodetectors,lasers and higher-order multiphoton uores-cent detectors.In this work,we synthesized CsPbCl_(3)micro/nanocrystals by vapor depo-sition method with CsCl and PbCl_(2)powders as the source materials.It was con rmed that the formation of CsPbCl_(3)perovskite through the chemical reaction of CsCl with PbCl_(2)occurred in the quartz boat before the source evaporation,not in vapor or on sub-strate surface.The evaporated CsPbCl_(3)can form micro/nanocrystals on substrate surfaces under appropriate conditions.Various morphologies including irregular polyhedrons,rods and pyramids could be observed at lower temperature,while stable and uniform CsPbCl_(3)single crystal microplatelets were controllably synthesized at 450℃.Prolonging the growth time could modulate the size and density of the microcrystals,but could not change the morphology.Substrate types made little di erence to the morphology of CsPbCl_(3)crystals.The photoluminescence spectra indicated that the crystallinity and morphology of CsPbCl_(3)micro/nanocrystals have signi cant e ects on their optical properties.The work is expected to be helpful to the development of optoelectronic devices based on individual CsPbCl_(3)microcrystal.
基金Supported by National Natural Science Foundation of China,No.82070682。
文摘BACKGROUND Per-oral endoscopic myotomy(POEM)is emerging as a prefer treatment option for pediatric achalasia.However,data are limited on the long-term efficacy of POEM in children and adolescents with achalasia.AIM To evaluate the safety and long-term efficacy of POEM for pediatric patients with achalasia and compare those outcomes with adult patients.METHODS This retrospective cohort study was conducted in patients with achalasia who underwent POEM.Patients aged under 18 years were included in the pediatric group;patients aged between 18 to 65 years who underwent POEM in the same period were assigned to the control group.For investigation of long-term followup,the pediatric group were matched with patients from the control group in a 1:1 ratio.The procedure-related parameters,adverse events,clinical success,gastroesophageal reflux disease(GERD)after POEM,and quality of life(QoL)were evaluated.RESULTS From January 2012 to March 2020,POEM was performed in 1025 patients aged under 65 years old(48 in the pediatric group,1025 in the control group).No significant differences were observed in the occurrence of POEM complications between the two groups(14.6%vs 14.6%;P=0.99).Among the 34 pediatric patients(70.8%)who underwent follow-up for 5.7 years(range 2.6-10.6 years),clinical success was achieved in 35 patients(35/36;97.2%).No differences were observed in post-POEM GERD occurrence(17.6%vs 35.3%;P=0.10).QoL was significantly improved in both groups after POEM.CONCLUSION POEM is safe and effective for pediatric patients with achalasia.It can achieve significant symptoms relief and improve QoL.
文摘新一代的三维视频编码标准——3D-HEVC (3D High Efficient Video Coding)为了显著减少视点个数,增加了包含视频场景几何信息的深度图像,但深度图像编码的计算复杂度非常高,其编码时间是彩色图像的4倍左右。为了降低深度图像编码的计算复杂度,文中提出了一种基于纹理特征分析的深度图像帧内编码单元(CU)快速划分算法。首先,对深度图像的编码树单元(CTU)进行初级纹理特征分析,根据深度图像的纹理变化特征,在大津法的基础上对全局灰度进行分级,再通过判断CTU内采样点的纹理复杂度以及纹理方向标识来确定当前CTU的划分趋势。然后,对纹理复杂度高的CTU进行CU级别的精细纹理特征分析,利用CU内部像素分布的统计特征,自底向上计算不同尺寸的CU的纹理划分标识。最后,根据CTU的纹理复杂度、纹理方向标识以及CU的纹理划分标识预测当前CTU的划分深度范围,并判断是否提前终止CU划分。实验结果表明,与3D-HEVC参考模型中的原始算法相比,所提算法在平均增加0.8%左右码率的同时,能够降低45%左右的编码时间,同时保持了良好的编码率失真性能;与现有的3种快速算法相比,所提算法在整体序列上分别降低了约12%,3%,4%的编码时间,而在大分辨率序列上则分别降低了14%,11%,10%的编码时间,并具有相近的编码率失真性能。
基金supported by Yantai Science and Technology Development Projects(2008142-19)
文摘Objective:To observe effect of alprostadil combined with Diammonium glycyrrhizinate on renal interstitial fibrosis in SD rate.Methods:A total of 75 SD rate were randomly divided into A,B,C,D,E groups with 15 in each group.Rats in group A served as the control group received just only but tissue separation without modeling operation,while model of unilateral ureteral obstruction(UUO) was established in B,C,D,E groups.Rats in A,B group were given saline lavage placebo treatment,while rats in C,D,E groups were given dianunonium glycyrrhizinate and alprostadil injection.Five rats were sacrificed 1,2,3 weeks after modeling,serum creatinine level of femoral venous blood was determined.Transforming growth factor- β1(TCF- β1) and concentration of connective tissue growth factor(CTGF) were also detected by using ELISA.Line renal interstitial tissue was taken after HE staining,renal interstitial TGF- β1 and CTGF expression were detected by using immunohistochemical method.Results:Serum creatinine levels of B,C,D,E group at different time points in were significantly higher than that of group A(P<0.05);serum creatinine levels in group B were significantly higher than that of C,D,E group at each time point(P<0.05).Serum creatinine level of Croup E was significantly lower than C,D group after 2,3 weeks(P<0.05).Rate in A group at each time point showed no significant changes in TGF- β1 and CREA concentration in serum and kidney tissues(P>0.05);while serum and kidney tissue TGF- β1,concentration of CREA.expression of rats in B,C,D,E groups showed a gradual increasing trend over time.TCF- β1 and CREF of Group B in serum and kidney tissues at each time point were significantly higher than that of the other groups(P<0.05).TCF- β1 and CREF of Group E in serum and kidney tissues at each time point were significantly lower than that of B,C,D group at all time points in serum and kidney tissues(P<0.05).Conclusions:Alprostadil combined with diammonium glycyrrhizinate can significantly lower the expression of TGF- β1 and CTGF in serum and tissues of SD rat with renal interstitial fibrosis,thus inhibit rat renal interstitial fibrosis process.It has synergy protective effect.