Insulin resistance is a major risk factor for type 2 diabetes.AMP-activated protein kinase(AMPK)is a drug target in the improvement of insulin sensitivity.Several insulin-sensitizing medicines are able to activate AMP...Insulin resistance is a major risk factor for type 2 diabetes.AMP-activated protein kinase(AMPK)is a drug target in the improvement of insulin sensitivity.Several insulin-sensitizing medicines are able to activate AMPK through inhibition of mitochondrial functions.These drugs,such as metformin and STZ,inhibit ATP synthesis in mitochondria to raise AMP/ATP ratio in the.process of A MPK activation.However,chemicals that activate AMPK directly or by activating its upstream kinases have not been approved for treatment of type 2 diabetes in humans.In an early study,we reported that berberine inhibited oxygen consumption in mitochondria,and increased AMP/ATP ratio in cells.The observation suggests an indirect mechanism for AMPK activation by berberine.Berberine stimulates glycolysis for ATP production that offsets the cell toxicity after mitochondria inhibition.The study suggests that mitochondrial inhibition is an approach for AMPK activation.In this review article,literature is critically reviewed to interpret the role of mitochondria function in the mechanism of insulin resistance,which supports that mitochondria inhibitors represent a new class of AMPK activator.The inhibitors are promising candidates for insulin sensitizers.This review provides a guideline in search for small molecule AMPK activators in the drug discovery for type 2 diabetes.展开更多
Carbon dots(Cdots)with a broad light absorption range could be a potential stable sensitizer for TiO2,which is an excellent ultraviolet(UV)response photocatalyst.Herein,we systematically investigated the different col...Carbon dots(Cdots)with a broad light absorption range could be a potential stable sensitizer for TiO2,which is an excellent ultraviolet(UV)response photocatalyst.Herein,we systematically investigated the different color emissive Cdots-sensitized TiO2 for H2 production.Firstly,all kinds of Cdots enhanced the photocatalytic properties of TiO2.All the Cdots-sensitized TiO2 exhibits visible light H2 production due to their absorption in the visible light region.The photocurrent and H2 production amount display strong dependence on the light absorption range of Cdots.The blue-emissive Cdots endow the weak H2 production rate due to its weak absorption in the visible light.The enhanced photocatalytic activities are mainly contributed to the strong light absorbance and high-efficient charge separation.The light absorption of green-and red-emissive Cdots is another main factor for the high catalytic activities besides charge separation.展开更多
The immune system is involved in the initiation and progression of cancer. Research on cancer and immunity has contributed to the development of several clinically successful immunotherapies. These immunotherapies oft...The immune system is involved in the initiation and progression of cancer. Research on cancer and immunity has contributed to the development of several clinically successful immunotherapies. These immunotherapies often act on a single step of the cancer-immunity cycle. In recent years, the discovery of new nanomaterials has dramatically expanded the functions and potential applications of nanomaterials. In addition to acting as drug-delivery platforms, some nanomaterials can induce the immunogenic cell death(ICD) of cancer cells or regulate the profile and strength of the immune response as immunomodulators.Based on their versatility, nanomaterials may serve as an integrated platform for multiple drugs or therapeutic strategies, simultaneously targeting several steps of the cancer-immunity cycle to enhance the outcome of anticancer immune response. To illustrate the critical roles of nanomaterials in cancer immunotherapies based on cancer-immunity cycle, this review will comprehensively describe the crosstalk between the immune system and cancer, and the current applications of nanomaterials, including drug carriers, ICD inducers, and immunomodulators. Moreover, this review will provide a detailed discussion of the knowledge regarding developing combinational cancer immunotherapies based on the cancer-immunity cycle, hoping to maximize the efficacy of these treatments assisted by nanomaterials.展开更多
基金This work is supported by the National Institute of Health research projects(DK085495,DK068036).
文摘Insulin resistance is a major risk factor for type 2 diabetes.AMP-activated protein kinase(AMPK)is a drug target in the improvement of insulin sensitivity.Several insulin-sensitizing medicines are able to activate AMPK through inhibition of mitochondrial functions.These drugs,such as metformin and STZ,inhibit ATP synthesis in mitochondria to raise AMP/ATP ratio in the.process of A MPK activation.However,chemicals that activate AMPK directly or by activating its upstream kinases have not been approved for treatment of type 2 diabetes in humans.In an early study,we reported that berberine inhibited oxygen consumption in mitochondria,and increased AMP/ATP ratio in cells.The observation suggests an indirect mechanism for AMPK activation by berberine.Berberine stimulates glycolysis for ATP production that offsets the cell toxicity after mitochondria inhibition.The study suggests that mitochondrial inhibition is an approach for AMPK activation.In this review article,literature is critically reviewed to interpret the role of mitochondria function in the mechanism of insulin resistance,which supports that mitochondria inhibitors represent a new class of AMPK activator.The inhibitors are promising candidates for insulin sensitizers.This review provides a guideline in search for small molecule AMPK activators in the drug discovery for type 2 diabetes.
基金financially supported by the Beijing Municipal High Level Innovative Team Building Program (No. IDHT20180504)the National Natural Science Foundation of China (Nos. 21805004, 21671011, 21872001 and 51801006)+3 种基金Beijing Natural Science Foundation (No. KZ201710005002 and 2192005)the Natural Science Foundation of the Beijing Municipal Education Committee, China Postdoctoral Science Foundation (No. 2018M641133)Beijing Postdoctoral Research Foundation (No. 2018-ZZ-021)Chaoyang District Postdoctoral Research Foundation (No. 2018-ZZ-026)
文摘Carbon dots(Cdots)with a broad light absorption range could be a potential stable sensitizer for TiO2,which is an excellent ultraviolet(UV)response photocatalyst.Herein,we systematically investigated the different color emissive Cdots-sensitized TiO2 for H2 production.Firstly,all kinds of Cdots enhanced the photocatalytic properties of TiO2.All the Cdots-sensitized TiO2 exhibits visible light H2 production due to their absorption in the visible light region.The photocurrent and H2 production amount display strong dependence on the light absorption range of Cdots.The blue-emissive Cdots endow the weak H2 production rate due to its weak absorption in the visible light.The enhanced photocatalytic activities are mainly contributed to the strong light absorbance and high-efficient charge separation.The light absorption of green-and red-emissive Cdots is another main factor for the high catalytic activities besides charge separation.
基金supported by the National Natural Science Foundation of China(22007106,31800842,31922042 and 81771966)Technology&Innovation Commission of Shenzhen Municipality(JCYJ20180507181654186 and JCYJ20170818162637217,China)+1 种基金the Fundamental Research Funds for the Central Universities(2020-RC320-002 and 2019PT320028)the China Postdoctoral Science Foundation(2019TQ0396,China)。
文摘The immune system is involved in the initiation and progression of cancer. Research on cancer and immunity has contributed to the development of several clinically successful immunotherapies. These immunotherapies often act on a single step of the cancer-immunity cycle. In recent years, the discovery of new nanomaterials has dramatically expanded the functions and potential applications of nanomaterials. In addition to acting as drug-delivery platforms, some nanomaterials can induce the immunogenic cell death(ICD) of cancer cells or regulate the profile and strength of the immune response as immunomodulators.Based on their versatility, nanomaterials may serve as an integrated platform for multiple drugs or therapeutic strategies, simultaneously targeting several steps of the cancer-immunity cycle to enhance the outcome of anticancer immune response. To illustrate the critical roles of nanomaterials in cancer immunotherapies based on cancer-immunity cycle, this review will comprehensively describe the crosstalk between the immune system and cancer, and the current applications of nanomaterials, including drug carriers, ICD inducers, and immunomodulators. Moreover, this review will provide a detailed discussion of the knowledge regarding developing combinational cancer immunotherapies based on the cancer-immunity cycle, hoping to maximize the efficacy of these treatments assisted by nanomaterials.
