Potential natural vegetation(PNV)is a valuable reference for ecosystem renovation and has garnered increasing attention worldwide.However,there is limited knowledge on the spatio-temporal distributions,transitional pr...Potential natural vegetation(PNV)is a valuable reference for ecosystem renovation and has garnered increasing attention worldwide.However,there is limited knowledge on the spatio-temporal distributions,transitional processes,and underlying mechanisms of global natural vegetation,particularly in the case of ongoing climate warming.In this study,we visualize the spatio-temporal pattern and inter-transition procedure of global PNV,analyse the shifting distances and directions of global PNV under the influence of climatic disturbance,and explore the mechanisms of global PNV in response to temperature and precipitation fluctuations.To achieve this,we utilize meteorological data,mainly temperature and precipitation,from six phases:the Last Inter-Glacial(LIG),the Last Glacial Maximum(LGM),the Mid Holocene(MH),the Present Day(PD),2030(20212040)and 2090(2081–2100),and employ a widely-accepted comprehensive and sequential classification sy–stem(CSCS)for global PNV classification.We find that the spatial patterns of five PNV groups(forest,shrubland,savanna,grassland and tundra)generally align with their respective ecotopes,although their distributions have shifted due to fluctuating temperature and precipitation.Notably,we observe an unexpected transition between tundra and savanna despite their geographical distance.The shifts in distance and direction of five PNV groups are mainly driven by temperature and precipitation,although there is heterogeneity among these shifts for each group.Indeed,the heterogeneity observed among different global PNV groups suggests that they may possess varying capacities to adjust to and withstand the impacts of changing climate.The spatio-temporal distributions,mutual transitions and shift tendencies of global PNV and its underlying mechanism in face of changing climate,as revealed in this study,can significantly contribute to the development of strategies for mitigating warming and promoting re-vegetation in degraded regions worldwide.展开更多
Non-small cell lung cancer(NSCLC)is a highly lethal cancer,and better treatments are urgently needed.Many studies have implicated circular RNAs(circRNAs)in the progression of multiple malignant tumors.Nonetheless,the ...Non-small cell lung cancer(NSCLC)is a highly lethal cancer,and better treatments are urgently needed.Many studies have implicated circular RNAs(circRNAs)in the progression of multiple malignant tumors.Nonetheless,the functions of circRNAs in NSCLC remain unclear.To study new targets for the treatment of NSCLC,circRNA expression profiling was performed on NSCLC tissues and para-carcinoma nonmalignant tissues.RNA was isolated and used for circRNA sequencing.Biological studies were performed in vitro and in vivo to determine the functions of circRNAs in NSCLC,including their functions in cell proliferation and migration.How circRNAs function in NSCLC was explored to clarify the underlying regulatory mechanisms.We found that circUCP2 was upregulated in NSCLC tissues compared with neighboring nonmalignant tissues.circUCP2 promoted the proliferation and metastasis of NSCLC cells.circUCP2 promoted NSCLC progression by sponging miR-149 and upregulating UCP2.The circUCP2/miR-149/UCP2 axis accelerates the progression of NSCLC,and circUCP2 may therefore be a novel diagnostic biomarker for the progression of NSCLC.展开更多
基金funded by the National Natural Science Foundation of China(grants No.30960264,31160475 and 42071258)Open Research Fund of TPESER(grant No.TPESER202208)+2 种基金Special Fund for Basic Scientific Research of Central Colleges,Chang’an University,China(grant No.300102353501)Natural Science Foundation of Gansu Province,China(grant No.22JR5RA857)Higher Education Novel Foundation of Gansu Province,China(grant No.2021B-130)。
文摘Potential natural vegetation(PNV)is a valuable reference for ecosystem renovation and has garnered increasing attention worldwide.However,there is limited knowledge on the spatio-temporal distributions,transitional processes,and underlying mechanisms of global natural vegetation,particularly in the case of ongoing climate warming.In this study,we visualize the spatio-temporal pattern and inter-transition procedure of global PNV,analyse the shifting distances and directions of global PNV under the influence of climatic disturbance,and explore the mechanisms of global PNV in response to temperature and precipitation fluctuations.To achieve this,we utilize meteorological data,mainly temperature and precipitation,from six phases:the Last Inter-Glacial(LIG),the Last Glacial Maximum(LGM),the Mid Holocene(MH),the Present Day(PD),2030(20212040)and 2090(2081–2100),and employ a widely-accepted comprehensive and sequential classification sy–stem(CSCS)for global PNV classification.We find that the spatial patterns of five PNV groups(forest,shrubland,savanna,grassland and tundra)generally align with their respective ecotopes,although their distributions have shifted due to fluctuating temperature and precipitation.Notably,we observe an unexpected transition between tundra and savanna despite their geographical distance.The shifts in distance and direction of five PNV groups are mainly driven by temperature and precipitation,although there is heterogeneity among these shifts for each group.Indeed,the heterogeneity observed among different global PNV groups suggests that they may possess varying capacities to adjust to and withstand the impacts of changing climate.The spatio-temporal distributions,mutual transitions and shift tendencies of global PNV and its underlying mechanism in face of changing climate,as revealed in this study,can significantly contribute to the development of strategies for mitigating warming and promoting re-vegetation in degraded regions worldwide.
基金supported by grants from the Science and Technology Program of Guangzhou(202102080084,Han Yang)the Key Project of Scientific Research Plan of Hunan Provincial Health Commission(C202301047982,Wei Du)+1 种基金the Wings Scientific and Technological Foundation of The First People’s Hospital of Changde City(2022ZZ05,Wei Du)the Traditional Chinese Medicine Bureau of Guangdong Province(20161062,Qing Liu).
文摘Non-small cell lung cancer(NSCLC)is a highly lethal cancer,and better treatments are urgently needed.Many studies have implicated circular RNAs(circRNAs)in the progression of multiple malignant tumors.Nonetheless,the functions of circRNAs in NSCLC remain unclear.To study new targets for the treatment of NSCLC,circRNA expression profiling was performed on NSCLC tissues and para-carcinoma nonmalignant tissues.RNA was isolated and used for circRNA sequencing.Biological studies were performed in vitro and in vivo to determine the functions of circRNAs in NSCLC,including their functions in cell proliferation and migration.How circRNAs function in NSCLC was explored to clarify the underlying regulatory mechanisms.We found that circUCP2 was upregulated in NSCLC tissues compared with neighboring nonmalignant tissues.circUCP2 promoted the proliferation and metastasis of NSCLC cells.circUCP2 promoted NSCLC progression by sponging miR-149 and upregulating UCP2.The circUCP2/miR-149/UCP2 axis accelerates the progression of NSCLC,and circUCP2 may therefore be a novel diagnostic biomarker for the progression of NSCLC.
