Liver cirrhosis is the common endpoint of many hepatic diseases and represents a relevant risk for liver failure and hepatocellular carcinoma.The progress of liver fibrosis and cirrhosis is accompanied by deterioratin...Liver cirrhosis is the common endpoint of many hepatic diseases and represents a relevant risk for liver failure and hepatocellular carcinoma.The progress of liver fibrosis and cirrhosis is accompanied by deteriorating liver function.This review summarizes the regulatory and functional changes in phase Ⅰ and phaseⅡmetabolic enzymes as well as transport proteins and provides an overview regarding lipid and glucose metabolism in cirrhotic patients.Interestingly,phase Ⅰ enzymes are generally down regulated transcriptionally,while phaseⅡenzymes are mostly preserved transcriptionally but are reduced in their function.Transport proteins are regulated in a specific way that resembles the molecular changes observed in obstructive cholestasis.Lipid and glucose metabolism are characterized by insulin resistance and catabolism,leading to the disturbance of energy expenditure and wasting.Possible non-invasive tests,especially breath tests,for components of liver metabolism are discussed.The heterogeneity and complexity of changes in hepatic metabolism complicate the assessment of liver function in individual patients.Additionally,studies in humans are rare,and species differences preclude the transferability of data from rodents to humans.In clinical practice,some established global scores or criteria form the basis for the functional evaluation of patients with liver cirrhosis,but difficult treatment decisions such as selection for transplantation or resection require further research regarding the application of existing non-invasive tests and the development of more specific tests.展开更多
Apolipoprotein E is the major lipid transporter in the brain and an important player in neuron-astrocyte metabolic coupling.It ensures the survival of neurons under stressful conditions and hyperactivity by nourishing...Apolipoprotein E is the major lipid transporter in the brain and an important player in neuron-astrocyte metabolic coupling.It ensures the survival of neurons under stressful conditions and hyperactivity by nourishing and detoxifying them.Apolipoprotein E polymorphism,combined with environmental stresses and/or age-related alterations,influences the risk of developing late-onset Alzheimer’s disease.In this review,we discuss our current knowledge of how apolipoprotein E homeostasis,i.e.its synthesis,secretion,degradation,and lipidation,is affected in Alzheimer’s disease.展开更多
In this study, content and distribution of organic matters （OM） and lipid biomarkers in surface sediments from northern South China Sea （SCS） were identified to reveal the sources and transport of fine-grained sed...In this study, content and distribution of organic matters （OM） and lipid biomarkers in surface sediments from northern South China Sea （SCS） were identified to reveal the sources and transport of fine-grained sediments. Organic matters and lipid biomarkers exhibited distinct spatial variation in northern SCS. Terrestrial discharge from the Pearl River and some mountainous rivers in southwestern Taiwan may contribute to the relatively high organic matters in the corresponding sea areas. The detection of unsaturated fatty acid homologues suggested the algal and/or bacterial OM contribution to surface sediments. The composites and distribution of lipid biomarkers indicate their mixed sources from terrestrial plants, marine algae and bacterial. Together with the proof of clay min- eral composites in the sediments, the results suggested that the currents, including the Guangdong Coastal Current and Kuroshio Current, control the transport and distribution of terrestrial sediment and the sedimentary environment in the northern SCS.展开更多
内质网应激激活的未折叠蛋白反应(unfolded protein response,UPR)是维持机体代谢平衡的重要信号通路。同时,内质网与脂类合成、转运和分解密切相关。近来研究发现UPR对脂类代谢具有调节作用。主要讨论内质网应激激活的UPR对脂类合成、...内质网应激激活的未折叠蛋白反应(unfolded protein response,UPR)是维持机体代谢平衡的重要信号通路。同时,内质网与脂类合成、转运和分解密切相关。近来研究发现UPR对脂类代谢具有调节作用。主要讨论内质网应激激活的UPR对脂类合成、转运和分解的影响及其机制。展开更多
Pulmonary delivery is an effective drug delivery strategy for the treatment of local respiratory diseases.However,the rapid systemic absorption through the lung due to the thin barrier and persistent lung clearances i...Pulmonary delivery is an effective drug delivery strategy for the treatment of local respiratory diseases.However,the rapid systemic absorption through the lung due to the thin barrier and persistent lung clearances influence the drug retention in the lung.In this study,we designed a lipid-coated genistein nanocrystals(Lipo-NCs)formulation to achieve enhanced efficiency of local pulmonary delivery.The LipoNCs were fabricated by modifying genistein nanocrystals(NCs)with phospholipid membrane through thin film hydration following the homogenization method.The prepared Lipo-NCs exhibited a decreased drug release rate compared with the naked NCs.Our results demonstrated that intracellular uptake and transcellular transport of NCs by the Calu-3 epithelial layer were reduced after lipid coating.Furthermore,the macrophages clearance was also impeded by this Lipo-NCs formulation.In vivo lung retention and distribution revealed that more genistein was retained in the lung after intratracheal administration of Lipo-NCs.The pharmacokinetic study displayed that the AUC((0-t))values of Lipo-NCs were 1.59-fold lesser than those of the NCs group,indicating a reduced systemic absorption.In conclusion,this research indicated that Lipo-NCs could be a suitable formulation for reducing systemic absorption and macrophages clearance,and thus enhancing drug concentration in lung by pulmonary delivery.展开更多
文摘Liver cirrhosis is the common endpoint of many hepatic diseases and represents a relevant risk for liver failure and hepatocellular carcinoma.The progress of liver fibrosis and cirrhosis is accompanied by deteriorating liver function.This review summarizes the regulatory and functional changes in phase Ⅰ and phaseⅡmetabolic enzymes as well as transport proteins and provides an overview regarding lipid and glucose metabolism in cirrhotic patients.Interestingly,phase Ⅰ enzymes are generally down regulated transcriptionally,while phaseⅡenzymes are mostly preserved transcriptionally but are reduced in their function.Transport proteins are regulated in a specific way that resembles the molecular changes observed in obstructive cholestasis.Lipid and glucose metabolism are characterized by insulin resistance and catabolism,leading to the disturbance of energy expenditure and wasting.Possible non-invasive tests,especially breath tests,for components of liver metabolism are discussed.The heterogeneity and complexity of changes in hepatic metabolism complicate the assessment of liver function in individual patients.Additionally,studies in humans are rare,and species differences preclude the transferability of data from rodents to humans.In clinical practice,some established global scores or criteria form the basis for the functional evaluation of patients with liver cirrhosis,but difficult treatment decisions such as selection for transplantation or resection require further research regarding the application of existing non-invasive tests and the development of more specific tests.
基金supported by the financial support of the Louis-Jeantet Foundation(to ACG).
文摘Apolipoprotein E is the major lipid transporter in the brain and an important player in neuron-astrocyte metabolic coupling.It ensures the survival of neurons under stressful conditions and hyperactivity by nourishing and detoxifying them.Apolipoprotein E polymorphism,combined with environmental stresses and/or age-related alterations,influences the risk of developing late-onset Alzheimer’s disease.In this review,we discuss our current knowledge of how apolipoprotein E homeostasis,i.e.its synthesis,secretion,degradation,and lipidation,is affected in Alzheimer’s disease.
基金supported by the In-novative Program of CAS(No.KZCX2-YW-GJ03)973 Pro-ject(No.2009CB219502-04)+1 种基金Tfounded by the Natural Science Foundation of Guangdong Province(No.S2013010013744)Scientific Frontier Program for Young Talents of the South China Sea Institute of Oceanology,CAS(No.SQ200909)
文摘In this study, content and distribution of organic matters （OM） and lipid biomarkers in surface sediments from northern South China Sea （SCS） were identified to reveal the sources and transport of fine-grained sediments. Organic matters and lipid biomarkers exhibited distinct spatial variation in northern SCS. Terrestrial discharge from the Pearl River and some mountainous rivers in southwestern Taiwan may contribute to the relatively high organic matters in the corresponding sea areas. The detection of unsaturated fatty acid homologues suggested the algal and/or bacterial OM contribution to surface sediments. The composites and distribution of lipid biomarkers indicate their mixed sources from terrestrial plants, marine algae and bacterial. Together with the proof of clay min- eral composites in the sediments, the results suggested that the currents, including the Guangdong Coastal Current and Kuroshio Current, control the transport and distribution of terrestrial sediment and the sedimentary environment in the northern SCS.
基金supported by the Multi-Year Research Grants from the University of Macao(No.MYRG2019–00032-ICMS)Natural Science Foundation of Jiangsu Province(No.BK20210912)+1 种基金the startup grant of Xuzhou Medical University(D2021004)Macao Science and Technology Development Fund(No.0017/2019/AKP)。
文摘Pulmonary delivery is an effective drug delivery strategy for the treatment of local respiratory diseases.However,the rapid systemic absorption through the lung due to the thin barrier and persistent lung clearances influence the drug retention in the lung.In this study,we designed a lipid-coated genistein nanocrystals(Lipo-NCs)formulation to achieve enhanced efficiency of local pulmonary delivery.The LipoNCs were fabricated by modifying genistein nanocrystals(NCs)with phospholipid membrane through thin film hydration following the homogenization method.The prepared Lipo-NCs exhibited a decreased drug release rate compared with the naked NCs.Our results demonstrated that intracellular uptake and transcellular transport of NCs by the Calu-3 epithelial layer were reduced after lipid coating.Furthermore,the macrophages clearance was also impeded by this Lipo-NCs formulation.In vivo lung retention and distribution revealed that more genistein was retained in the lung after intratracheal administration of Lipo-NCs.The pharmacokinetic study displayed that the AUC((0-t))values of Lipo-NCs were 1.59-fold lesser than those of the NCs group,indicating a reduced systemic absorption.In conclusion,this research indicated that Lipo-NCs could be a suitable formulation for reducing systemic absorption and macrophages clearance,and thus enhancing drug concentration in lung by pulmonary delivery.
