Non-alcoholic fatty liver disease(NAFLD)is associated with mutations in lipopolysaccharide-binding protein(LBP),but the underlying epigenetic mechanisms remain understudied.Herein,LBP^(-/-)rats with NAFLD were establi...Non-alcoholic fatty liver disease(NAFLD)is associated with mutations in lipopolysaccharide-binding protein(LBP),but the underlying epigenetic mechanisms remain understudied.Herein,LBP^(-/-)rats with NAFLD were established and used to conduct integrative targetingactive enhancer histone H3 lysine 27 acetylation(H3K27ac)chromatin immunoprecipitation coupled with high-throughput and transcriptomic sequencing analysis to explore the potential epigenetic pathomechanisms of active enhancers of NAFLD exacerbation upon LBP deficiency.Notably,LBP^(-/-)reduced the inflammatory response but markedly aggravated high-fat diet(HFD)-induced NAFLD in rats,with pronounced alterations in the histone acetylome and regulatory transcriptome.In total,1128 differential enhancer-target genes significantly enriched in cholesterol and fatty acid metabolism were identified between wild-type(WT)and LBP^(-/-)NAFLD rats.Based on integrative analysis,CCAAT/enhancer-binding proteinβ(C/EBPβ)was identified as a pivotal transcription factor(TF)and contributor to dysregulated histone acetylome H3K27ac,and the lipid metabolism gene SCD was identified as a downstream effector exacerbating NAFLD.This study not only broadens our understanding of the essential role of LBP in the pathogenesis of NAFLD from an epigenetics perspective but also identifies key TF C/EBPβand functional gene SCD as potential regulators and therapeutic targets.展开更多
目的探究不同亚型重性抑郁障碍(major depressive disorder,MDD)患者事件相关电位(event-related potential,ERP)N170差异。方法纳入MDD患者和健康对照,采用30项抑郁症状量表(30-item inventory of depressive symptomatology,IDS-30)...目的探究不同亚型重性抑郁障碍(major depressive disorder,MDD)患者事件相关电位(event-related potential,ERP)N170差异。方法纳入MDD患者和健康对照,采用30项抑郁症状量表(30-item inventory of depressive symptomatology,IDS-30)、17项汉密尔顿抑郁量表(17-item Hamilton depression rating scale,HAMD-17)将患者分为焦虑型、忧郁型、混合型。对所有受试者评估重复性成套神经心理状态测验(repeatable battery for the assessment of neuropsychological status,RBANS),采集中性面孔刺激任务下N170波幅与潜伏期。结果共纳入74例焦虑型(anxious-somatizing depression,ASD)、40例忧郁型(melancholic depression,MD)、66例混合型MDD患者,以及38名对照。焦虑型、混合型HAMD-17总分、焦虑分比忧郁型高(P<0.05)。焦虑型、混合型RBANS总分低于对照组[中位数及四分位数:449(419,488)vs.481(419,500)vs.507.5(474,542),P<0.05]。事件相关电位N170经重复测量方差分析显示,分组和电极点对波幅有交互作用(P<0.05),其中在Pz电极点,混合型波幅比对照组低[(2.96±4.61)μV vs.(4.75±5.00)μV],差异有统计学意义(P<0.05)。结论焦虑型与混合型MDD患者抑郁症状及认知功能损害比忧郁型严重。在中性情绪面孔刺激下,混合型患者存在面孔认知功能障碍。展开更多
Effects of dietary supplementation of chitosan-oligosaccharides(COS)on the growth performance,immune response,stress resistance,and disease resistance of juvenile rainbow trout Oncorhynchus mykiss were studied.Four ex...Effects of dietary supplementation of chitosan-oligosaccharides(COS)on the growth performance,immune response,stress resistance,and disease resistance of juvenile rainbow trout Oncorhynchus mykiss were studied.Four experimental diets containing 0,20,40,or 60 mg/kg COS(COS0,COS20,COS40,and COS60,respectively)were fed to juvenile rainbow trout(initial weight=5.2±0.3 g)for 8 weeks.By the end of the feeding trial,representative groups of fish from each dietary treatment were challenged with stressor(30 sec air exposure)and pathogen exposure(intraperitoneal injection with Aeromonas hydrophila).Results showed that supplementation of COS in diets did not affect production performance and body composition of rainbow trout.However,fish fed the COS40 diet demonstrated improved phagocytic activities,respiratory burst activities and decreased serum cortisol level.Additionally,survival following A.hydrophila challenge was significant higher among fish fed the COS-supplemented feeds,although there was no difference based on the level of supplementation.The present study suggests that COS can be used as an immuno-stimulant in rainbow trout feeds.展开更多
A variety of neurotrophic factors have been shown to repair the damaged peripheral nerve. However, in clinical practice, nerve growth factor, neurotrophin-3 and brain-derived neurotrophic factor are all peptides or pr...A variety of neurotrophic factors have been shown to repair the damaged peripheral nerve. However, in clinical practice, nerve growth factor, neurotrophin-3 and brain-derived neurotrophic factor are all peptides or proteins that may be rapidly deactivated at the focal injury site; their local effective concentration time following a single medication cannot meet the required time for spinal axons to regenerate and cross the glial scar. In this study, we produced polymer sustained-release microspheres based on the polylactic-co-glycolic acid copolymer; the microspheres at 300-μm diameter contained nerve growth factor, neurotrophin-3 and brain-derived neurotrophic factor. Six microspheres were longitudinally implanted into the sciatic nerve at the anastomosis site, serving as the experimental group; while the sciatic nerve in the control group was subjected to the end-to-end anastomosis using 10/0 suture thread. At 6 weeks after implantation, the lower limb activity, weight of triceps surae muscle, sciatic nerve conduction velocity and the maximum amplitude were obviously better in the experimental group than in the control group. Compared with the control group, more regenerating nerve fibers were observed and distributed in a dense and ordered manner with thicker myelin sheaths in the experimental group. More angiogenesis was also visible. Experimental findings indicate that polylactic-co-glycolic acid composite microspheres containing nerve growth factor, neurotrophin-3 and brain-derived neurotrophic factor can promote the restoration of sciatic nerve in rats after injury.展开更多
Photochemical smog characterized by high concentrations of ozone(O_(3)) is a serious air pollution issue in the North China Plain(NCP)region,especially in summer and autumn.For this study,measurements of O_(3),nitroge...Photochemical smog characterized by high concentrations of ozone(O_(3)) is a serious air pollution issue in the North China Plain(NCP)region,especially in summer and autumn.For this study,measurements of O_(3),nitrogen oxides(NO_(x)),volatile organic compounds(VOCs),carbon monoxide(CO),nitrous acid(HONO),and a number of key physical parameters were taken at a suburban site,Xianghe,in the NCP region during the summer of 2018 in order to better understand the photochemical processes leading to O_(3)formation and find an optimal way to control O_(3)pollution.Here,the radical chemistry and O_(3)photochemical budget based on measurement data from 1−23 July using a chemical box model is investigated.The daytime(0600−1800 LST)average production rate of the primary radicals referred to as RO_(x)(OH+HO2+RO2)is 3.9 ppbv h−1.HONO photolysis is the largest primary RO_(x)source(41%).Reaction of NO2+OH is the largest contributor to radical termination(41%),followed by reactions of RO2+NO2(26%).The average diurnal maximum O_(3)production and loss rates are 32.9 ppbv h−1 and 4.3 ppbv h−1,respectively.Sensitivity tests without the HONO constraint lead to decreases in daytime average primary RO_(x)production by 55%and O_(3)photochemical production by 42%,highlighting the importance of accurate HONO measurements when quantifying the RO_(x)budget and O_(3)photochemical production.Considering heterogeneous reactions of trace gases and radicals on aerosols,aerosol uptake of HO2 contributes 11%to RO_(x)sink,and the daytime average O_(3)photochemical production decreases by 14%.The O_(3)-NO_(x)-VOCs sensitivity shows that the O_(3)production at Xianghe during the investigation period is mainly controlled by VOCs.展开更多
Pursuing material development for next-generation batteries,organic electrode materials have shown great potential for lithium-ion batteries.However,their widespread adopting is plagued by intrinsic problems such as p...Pursuing material development for next-generation batteries,organic electrode materials have shown great potential for lithium-ion batteries.However,their widespread adopting is plagued by intrinsic problems such as poor electronic conductivity,high dissolution inside electrolytes and unstable chemical peculiarity.Recently,nanostructured-strategies promoted organic electrodes with exotic properties for enhancing electron and ion transport together with the stability during electrochemical process,have received increasing attention and have been extensive applied in boosting the organic lithium-ion based energy storage.In this review,we summarize the applications of nanostructures to improve the performance of both organic anodes and cathodes,including(i)nanoscale design of zero-dimensional organic electrode materials,(ii)strategies of one-dimensional nanostructured organic electrode materials,(iii)construction of two-dimensional nanosized organic composite electrodes,and(iv)three-dimensional exploration of nanosized organic electrodes.We hope to stimulate high-quality applied research on understanding and handling the relationship between the nanostructure and performance of organic lithium-ion batteries that might speed up the commercialization of organic lithium ion batteries.展开更多
Black carbon(BC)reduces the photolysis coefficient by absorbing solar radiation,thereby affecting the concentration of ozone(O_(3))near the ground.The influence of BC on O_(3)has thus received much attention.In this s...Black carbon(BC)reduces the photolysis coefficient by absorbing solar radiation,thereby affecting the concentration of ozone(O_(3))near the ground.The influence of BC on O_(3)has thus received much attention.In this study,Mie scattering and the tropospheric Ultraviolet and Visible radiation model are used to analyze the effect of BC optical properties on radiation.Combined with data of O_(3)precursors in Nanjing in 2014,an EKMA curve is drawn,and the variations in O_(3)concentration are further investigated using a zero-dimensional box mechanism model(NCAR MM).When O_(3)precursors are unchanged,radiation and O_(3)show a highly similar tendency in response to changing BC optical properties(R=0.997).With the increase of modal radius,the attenuation of fresh BC to radiation and O_(3)first trends upward before decreasing.In the mixing process,the attenuation of BC to radiation and O_(3)presents an upward tendency with the increase of relative humidity but decreases rapidly before increasing slowly with increasing thickness of coating.In addition,mass concentration is another major factor.When the BC to PM_(2.5)ratio increases to 5%in Nanjing,the radiation decreases by approximately 0.13%-3.71%while O_(3)decreases by approximately 8.13%-13.11%.The radiative effect of BC not only reduces O_(3)concentration but also changes the EKMA curve.Compared with the NO_(x)control area,radiation has a significant influence on the VOCs control area.When aerosol optical depth(AOD)increases by 17.15%,the NO_(x)to VOCs ratio decreases by 8.27%,and part of the original NO_(x)control area is transferred to the VOCs control area.展开更多
We prepared rabbit polyclonal antibodies against Kaposi's sarcoma-associated herpesvirus(KSHV)-encoded vcyclin(ORF 72)and detected the natural viral protein using these polyclonal antibodies.Three antigenic polype...We prepared rabbit polyclonal antibodies against Kaposi's sarcoma-associated herpesvirus(KSHV)-encoded vcyclin(ORF 72)and detected the natural viral protein using these polyclonal antibodies.Three antigenic polypeptides of v-cyclin were designed and synthesized.A fragment of the v-cyclin gene was cloned into a eukaryotic expression vector pEF-MCS-Flag-IRES/Puro to construct a recombinant vector,pEF v-cyclin.Then,pEF v-cyclin was transfected into 293T and EA.hy926 cells to obtain v-cyclin-Flag fusion proteins.Six New Zealand white rabbits were immunized with KLH-conjugated peptides to generate polyclonal antibodies against v-cyclin.The polyclonal antibodies were then characterized by ELISA and Western blotting assays.Finally,the polyclonal antibodies against v-cyclin were used to detect natural viral protein expressed in BCBL-1,BC-3,and JSC-1 cells.The results showed that using the Flag antibody,v-cyclin-Flag fusion protein was detected in 293T and EA.hy926 cells transfected with pEF-v-cyclin.Furthermore,ELISA showed that the titer of the induced polyclonal rabbit anti-vcyclin antibodies was higher than 1:8,000.In Western blotting assays,the antibodies reacted specifically with the v-cyclin-Flag fusion protein as well as the natural viral protein.The recombinant expression vector pEF-v-cyclin was constructed successfully,and the polyclonal antibodies prepared can be used for various biological tests including ELISA and Western blotting assays.展开更多
基金supported by the National Natural Science Foundation of China(81971875,82300661)Natural Science Foundation of Anhui province(2308085QH246)+3 种基金Natural Science Foundation of the Anhui Higher Education Institutions(KJ2021A0205)Basic and Clinical Cooperative Research Program of Anhui Medical University(2019xkjT002,2019xkjT022,2022xkjT013)Talent Training Program,School of Basic Medical Sciences,Anhui Medical University(2022YPJH102)National College Students Innovation and Entrepreneurship Training Program of China(202210366024)。
文摘Non-alcoholic fatty liver disease(NAFLD)is associated with mutations in lipopolysaccharide-binding protein(LBP),but the underlying epigenetic mechanisms remain understudied.Herein,LBP^(-/-)rats with NAFLD were established and used to conduct integrative targetingactive enhancer histone H3 lysine 27 acetylation(H3K27ac)chromatin immunoprecipitation coupled with high-throughput and transcriptomic sequencing analysis to explore the potential epigenetic pathomechanisms of active enhancers of NAFLD exacerbation upon LBP deficiency.Notably,LBP^(-/-)reduced the inflammatory response but markedly aggravated high-fat diet(HFD)-induced NAFLD in rats,with pronounced alterations in the histone acetylome and regulatory transcriptome.In total,1128 differential enhancer-target genes significantly enriched in cholesterol and fatty acid metabolism were identified between wild-type(WT)and LBP^(-/-)NAFLD rats.Based on integrative analysis,CCAAT/enhancer-binding proteinβ(C/EBPβ)was identified as a pivotal transcription factor(TF)and contributor to dysregulated histone acetylome H3K27ac,and the lipid metabolism gene SCD was identified as a downstream effector exacerbating NAFLD.This study not only broadens our understanding of the essential role of LBP in the pathogenesis of NAFLD from an epigenetics perspective but also identifies key TF C/EBPβand functional gene SCD as potential regulators and therapeutic targets.
文摘目的探究不同亚型重性抑郁障碍(major depressive disorder,MDD)患者事件相关电位(event-related potential,ERP)N170差异。方法纳入MDD患者和健康对照,采用30项抑郁症状量表(30-item inventory of depressive symptomatology,IDS-30)、17项汉密尔顿抑郁量表(17-item Hamilton depression rating scale,HAMD-17)将患者分为焦虑型、忧郁型、混合型。对所有受试者评估重复性成套神经心理状态测验(repeatable battery for the assessment of neuropsychological status,RBANS),采集中性面孔刺激任务下N170波幅与潜伏期。结果共纳入74例焦虑型(anxious-somatizing depression,ASD)、40例忧郁型(melancholic depression,MD)、66例混合型MDD患者,以及38名对照。焦虑型、混合型HAMD-17总分、焦虑分比忧郁型高(P<0.05)。焦虑型、混合型RBANS总分低于对照组[中位数及四分位数:449(419,488)vs.481(419,500)vs.507.5(474,542),P<0.05]。事件相关电位N170经重复测量方差分析显示,分组和电极点对波幅有交互作用(P<0.05),其中在Pz电极点,混合型波幅比对照组低[(2.96±4.61)μV vs.(4.75±5.00)μV],差异有统计学意义(P<0.05)。结论焦虑型与混合型MDD患者抑郁症状及认知功能损害比忧郁型严重。在中性情绪面孔刺激下,混合型患者存在面孔认知功能障碍。
基金Financial support was provided by 11th 5-year National Key Technologies R & D Program Project No.2006BAD12B06,2006BAD12B08
文摘Effects of dietary supplementation of chitosan-oligosaccharides(COS)on the growth performance,immune response,stress resistance,and disease resistance of juvenile rainbow trout Oncorhynchus mykiss were studied.Four experimental diets containing 0,20,40,or 60 mg/kg COS(COS0,COS20,COS40,and COS60,respectively)were fed to juvenile rainbow trout(initial weight=5.2±0.3 g)for 8 weeks.By the end of the feeding trial,representative groups of fish from each dietary treatment were challenged with stressor(30 sec air exposure)and pathogen exposure(intraperitoneal injection with Aeromonas hydrophila).Results showed that supplementation of COS in diets did not affect production performance and body composition of rainbow trout.However,fish fed the COS40 diet demonstrated improved phagocytic activities,respiratory burst activities and decreased serum cortisol level.Additionally,survival following A.hydrophila challenge was significant higher among fish fed the COS-supplemented feeds,although there was no difference based on the level of supplementation.The present study suggests that COS can be used as an immuno-stimulant in rainbow trout feeds.
基金financially supported by a grant from the Natural Science Foundation of Hunan Province of China,No.13JJ6016
文摘A variety of neurotrophic factors have been shown to repair the damaged peripheral nerve. However, in clinical practice, nerve growth factor, neurotrophin-3 and brain-derived neurotrophic factor are all peptides or proteins that may be rapidly deactivated at the focal injury site; their local effective concentration time following a single medication cannot meet the required time for spinal axons to regenerate and cross the glial scar. In this study, we produced polymer sustained-release microspheres based on the polylactic-co-glycolic acid copolymer; the microspheres at 300-μm diameter contained nerve growth factor, neurotrophin-3 and brain-derived neurotrophic factor. Six microspheres were longitudinally implanted into the sciatic nerve at the anastomosis site, serving as the experimental group; while the sciatic nerve in the control group was subjected to the end-to-end anastomosis using 10/0 suture thread. At 6 weeks after implantation, the lower limb activity, weight of triceps surae muscle, sciatic nerve conduction velocity and the maximum amplitude were obviously better in the experimental group than in the control group. Compared with the control group, more regenerating nerve fibers were observed and distributed in a dense and ordered manner with thicker myelin sheaths in the experimental group. More angiogenesis was also visible. Experimental findings indicate that polylactic-co-glycolic acid composite microspheres containing nerve growth factor, neurotrophin-3 and brain-derived neurotrophic factor can promote the restoration of sciatic nerve in rats after injury.
基金This work was supported by grants from the National Key Research and Development Program of China(Grant No.2017YFC0210003).
文摘Photochemical smog characterized by high concentrations of ozone(O_(3)) is a serious air pollution issue in the North China Plain(NCP)region,especially in summer and autumn.For this study,measurements of O_(3),nitrogen oxides(NO_(x)),volatile organic compounds(VOCs),carbon monoxide(CO),nitrous acid(HONO),and a number of key physical parameters were taken at a suburban site,Xianghe,in the NCP region during the summer of 2018 in order to better understand the photochemical processes leading to O_(3)formation and find an optimal way to control O_(3)pollution.Here,the radical chemistry and O_(3)photochemical budget based on measurement data from 1−23 July using a chemical box model is investigated.The daytime(0600−1800 LST)average production rate of the primary radicals referred to as RO_(x)(OH+HO2+RO2)is 3.9 ppbv h−1.HONO photolysis is the largest primary RO_(x)source(41%).Reaction of NO2+OH is the largest contributor to radical termination(41%),followed by reactions of RO2+NO2(26%).The average diurnal maximum O_(3)production and loss rates are 32.9 ppbv h−1 and 4.3 ppbv h−1,respectively.Sensitivity tests without the HONO constraint lead to decreases in daytime average primary RO_(x)production by 55%and O_(3)photochemical production by 42%,highlighting the importance of accurate HONO measurements when quantifying the RO_(x)budget and O_(3)photochemical production.Considering heterogeneous reactions of trace gases and radicals on aerosols,aerosol uptake of HO2 contributes 11%to RO_(x)sink,and the daytime average O_(3)photochemical production decreases by 14%.The O_(3)-NO_(x)-VOCs sensitivity shows that the O_(3)production at Xianghe during the investigation period is mainly controlled by VOCs.
基金financial support by the National Natural Science Foundation of China(Grant nos.51722210,51972285 and U1802254)the Natural Science Foundation of Zhejiang Province(Grant nos.LY17E020010,LD18E020003 and LQ20E030012)the Innovation Fund of the Zhejiang Kechuang New Materials Research Institute(Grant no.ZKN-18-P05)。
文摘Pursuing material development for next-generation batteries,organic electrode materials have shown great potential for lithium-ion batteries.However,their widespread adopting is plagued by intrinsic problems such as poor electronic conductivity,high dissolution inside electrolytes and unstable chemical peculiarity.Recently,nanostructured-strategies promoted organic electrodes with exotic properties for enhancing electron and ion transport together with the stability during electrochemical process,have received increasing attention and have been extensive applied in boosting the organic lithium-ion based energy storage.In this review,we summarize the applications of nanostructures to improve the performance of both organic anodes and cathodes,including(i)nanoscale design of zero-dimensional organic electrode materials,(ii)strategies of one-dimensional nanostructured organic electrode materials,(iii)construction of two-dimensional nanosized organic composite electrodes,and(iv)three-dimensional exploration of nanosized organic electrodes.We hope to stimulate high-quality applied research on understanding and handling the relationship between the nanostructure and performance of organic lithium-ion batteries that might speed up the commercialization of organic lithium ion batteries.
基金This work was supported by grants from the National Key Research and Development Program of China(Grant No.2017YFC0210003)the National Natural Science Foundation of China(Grant No.42075177)the Qing Lan Project.
文摘Black carbon(BC)reduces the photolysis coefficient by absorbing solar radiation,thereby affecting the concentration of ozone(O_(3))near the ground.The influence of BC on O_(3)has thus received much attention.In this study,Mie scattering and the tropospheric Ultraviolet and Visible radiation model are used to analyze the effect of BC optical properties on radiation.Combined with data of O_(3)precursors in Nanjing in 2014,an EKMA curve is drawn,and the variations in O_(3)concentration are further investigated using a zero-dimensional box mechanism model(NCAR MM).When O_(3)precursors are unchanged,radiation and O_(3)show a highly similar tendency in response to changing BC optical properties(R=0.997).With the increase of modal radius,the attenuation of fresh BC to radiation and O_(3)first trends upward before decreasing.In the mixing process,the attenuation of BC to radiation and O_(3)presents an upward tendency with the increase of relative humidity but decreases rapidly before increasing slowly with increasing thickness of coating.In addition,mass concentration is another major factor.When the BC to PM_(2.5)ratio increases to 5%in Nanjing,the radiation decreases by approximately 0.13%-3.71%while O_(3)decreases by approximately 8.13%-13.11%.The radiative effect of BC not only reduces O_(3)concentration but also changes the EKMA curve.Compared with the NO_(x)control area,radiation has a significant influence on the VOCs control area.When aerosol optical depth(AOD)increases by 17.15%,the NO_(x)to VOCs ratio decreases by 8.27%,and part of the original NO_(x)control area is transferred to the VOCs control area.
文摘We prepared rabbit polyclonal antibodies against Kaposi's sarcoma-associated herpesvirus(KSHV)-encoded vcyclin(ORF 72)and detected the natural viral protein using these polyclonal antibodies.Three antigenic polypeptides of v-cyclin were designed and synthesized.A fragment of the v-cyclin gene was cloned into a eukaryotic expression vector pEF-MCS-Flag-IRES/Puro to construct a recombinant vector,pEF v-cyclin.Then,pEF v-cyclin was transfected into 293T and EA.hy926 cells to obtain v-cyclin-Flag fusion proteins.Six New Zealand white rabbits were immunized with KLH-conjugated peptides to generate polyclonal antibodies against v-cyclin.The polyclonal antibodies were then characterized by ELISA and Western blotting assays.Finally,the polyclonal antibodies against v-cyclin were used to detect natural viral protein expressed in BCBL-1,BC-3,and JSC-1 cells.The results showed that using the Flag antibody,v-cyclin-Flag fusion protein was detected in 293T and EA.hy926 cells transfected with pEF-v-cyclin.Furthermore,ELISA showed that the titer of the induced polyclonal rabbit anti-vcyclin antibodies was higher than 1:8,000.In Western blotting assays,the antibodies reacted specifically with the v-cyclin-Flag fusion protein as well as the natural viral protein.The recombinant expression vector pEF-v-cyclin was constructed successfully,and the polyclonal antibodies prepared can be used for various biological tests including ELISA and Western blotting assays.
