Background Aging is a multifactorial process associated with an impairment of autonomic nervous system(ANS)function.Progressive ANS remodeling includes upregulation of expression of circulating catecholamines and depl...Background Aging is a multifactorial process associated with an impairment of autonomic nervous system(ANS)function.Progressive ANS remodeling includes upregulation of expression of circulating catecholamines and depletion of cardiac autonomic nerve fibers,and it is responsible,in part,for the increased susceptibility to cardiac diseases observed in elderly subjects.Neurotrophic factors,such as brain-derived neurotrophic factor(BDNF)and nerve growth factor(NGF),are involved in synaptogenesis and neurite outgrowth processes,supporting neuronal cell differentiation and maturation.However,whether and how these factors and their downstream signaling are involved in cardiac aging remains unclear.Here,we tested whether,in the aged heart,the overall extent of autonomic fibers is reduced,owing to lower production of trophic factors such as BDNF and NGF.Methods In vivo,we used young(age:3 months;n=10)and old(age:24 months;n=11)male Fisher rats,whereas,we used human neuroblastoma(SH-SY5 Y)cells in vitro.Results Compared to the young rats,old rats displayed a marked reduction in the overall ANS fiber density,affecting both sympathetic and cholinergic compartments,as indicated by dopamineβ-hydroxylase(dβh)and vesicular acetylcholine transporter(Va Ch T)immunohistochemical staining.In addition,a marked downregulation of GAP-43 and BDNF protein was observed in the left ventricular lysates of old rats compared to those of young rats.Interestingly,we did not find any significant difference in cardiac NGF levels between the young and old groups.To further explore the impact of aging on ANS fibers,we treated SH-SY5 Y cells in vitro with serum obtained from young and old rats.Sera from both groups induced a remarkable increase in neuronal sprouting,as evidenced by a crystal violet assay.However,this effect was blunted in cells cultured with old rat serum and was accompanied by a marked reduction in GAP-43 and BDNF protein levels.Conclusions Our data indicate that physiological aging is associated with an impairment of ANS structure and function and that reduced BDNF levels are responsible,at least in part,for these phenomena.展开更多
Fast and sensitive detection of dilute rare earth species still represents a challenge for an on-site survey of new resources and evaluation of the economic value. In this work, a robust and low-cost protocol has been...Fast and sensitive detection of dilute rare earth species still represents a challenge for an on-site survey of new resources and evaluation of the economic value. In this work, a robust and low-cost protocol has been developed to analyze the concentration of rare earth ions using a smartphone camera. The success of this protocol relies on mesoporous silica nanoparticles(MSNs) with large-area negatively charged surfaces, on which the rare earth cations(e.g., Eu^(3+)) are efficiently adsorbed through electrostatic attraction to enable a ‘‘concentrating effect''. The initial adsorption rate is as fast as 4025 mg(g min)^(-1), and the adsorption capacity of Eu^(3+)ions in the MSNs is as high as 4730 mg g^(-1)(equivalent to ～41.2 M) at 70 °C. The concentrated Eu^(3+)ions in the MSNs can form a complex with a light sensitizer of 1,10-phenanthroline to significantly enhance the characteristic red emission of Eu^(3+)ions due to an ‘‘antenna effect'' that relies on the efficient energy transfer from the light sensitizer to the Eu^(3+)ions.The positive synergy of ‘‘concentrating effect'' and ‘‘antenna effect'' in the MSNs enables the analysis of rare earth ions in a wide dynamic range and with a detection limit down to ～80 nM even using a smartphone camera. Our results highlight the promise of the protocol in fieldwork for exploring valuable rare earth resources.展开更多
Photothermal catalysis represents a promising strategy to utilize the renewable energy source(e.g.,solar energy)to drive chemical reactions more efficiently.Successful and efficient photothermal catalysis relies on th...Photothermal catalysis represents a promising strategy to utilize the renewable energy source(e.g.,solar energy)to drive chemical reactions more efficiently.Successful and efficient photothermal catalysis relies on the availability of ideal photothermal catalysts,which can provide both large areas of catalytically active surface and strong light absorption power simultaneously.Such duplex requirements of a photothermal catalyst exhibit opposing dependence on the size of the catalyst nanoparticles,i.e.,smaller size is beneficial for achieving higher surface area and more active surface,whereas larger size favors the light absorption in the nanoparticles.In this article,we report the synthesis of ultrafine RuOOH nanoparticles with a size of 2–3 nm uniformly dispersed on the surfaces of silica(SiOx)nanospheres of hundreds of nanometers in size to tackle this challenge of forming an ideal photothermal catalyst.The ultrasmall RuOOH nanoparticles exhibit a large surface area as well as the ability to activate adsorbed molecular oxygen.The SiOx nanospheres exhibit strong surface light scattering resonances to enhance the light absorption power of the small RuOOH nanoparticles anchored on the SiOx surface.Therefore,the RuOOH/SiOx composite particles represent a new class of efficient photothermal catalysts with a photothermal energy conversion efficiency of 92.5%for selective aerobic oxidation of benzyl alcohol to benzylaldehyde under ambient conditions.展开更多
Cardiac amyloidosis(CA)is caused by deposition of amyloid fibrils in the myocardium and has two main sub-types,transthyretin cardiac amyloidosis(ATTR)and immunoglobulin light chain cardiac amyloidosis(AL).ATTR is furt...Cardiac amyloidosis(CA)is caused by deposition of amyloid fibrils in the myocardium and has two main sub-types,transthyretin cardiac amyloidosis(ATTR)and immunoglobulin light chain cardiac amyloidosis(AL).ATTR is further dif-ferentiated into wild-type(wtATTR)and hereditary(hATTR),depending on the absence or presence of mutation in the trans-thyretin gene.The increased recognition of disease with the improvement in diagnostic armamentarium and serendipitous ad-vancements in the therapeutic landscape have changed the status of CA from being a rare and untreatable disease to being a not-so-rare and treatable disease.Both ATTR and AL have certain clinical aspects that can provide early clues for the disease.While electrocardiography followed by echocardiography and subsequently cardiac magnetic resonance can raise suspicion for CA,the definitive diagnosis of ATTR is non-invasively established by bone scintigraphy while that of AL always needs histological con-firmation.Severity of CA can be gauged by serum biomarker-based staging of both ATTR and AL.ATTR therapies work by silen-cing or stabilizing TTR or by degrading amyloid fibrils,while AL is managed with anti-plasma cell therapies and autologous stem cell transplant.展开更多
In 2018,the STAR collaboration collected data from^(96)_(44)Ru+^(96)_(44)Ru and^(96)_(40)Zr+^(96)_(40)Zr at√^(S)NN=200 Ge V to search for the presence of the chiral magnetic effect in collisions of nuclei.The isobar ...In 2018,the STAR collaboration collected data from^(96)_(44)Ru+^(96)_(44)Ru and^(96)_(40)Zr+^(96)_(40)Zr at√^(S)NN=200 Ge V to search for the presence of the chiral magnetic effect in collisions of nuclei.The isobar collision species alternated frequently between 9644 Ru+^(96)_(44)Ru and^(96)_(40)Zr+^(96)_(40)Zr.In order to conduct blind analyses of studies related to the chiral magnetic effect in these isobar data,STAR developed a three-step blind analysis procedure.Analysts are initially provided a"reference sample"of data,comprised of a mix of events from the two species,the order of which respects time-dependent changes in run conditions.After tuning analysis codes and performing time-dependent quality assurance on the reference sample,analysts are provided a species-blind sample suitable for calculating efficiencies and corrections for individual≈30-min data-taking runs.For this sample,species-specific information is disguised,but individual output files contain data from a single isobar species.Only run-by-run corrections and code alteration subsequent to these corrections are allowed at this stage.Following these modifications,the"frozen"code is passed over the fully un-blind data,completing the blind analysis.As a check of the feasibility of the blind analysis procedure,analysts completed a"mock data challenge,"analyzing data from Au+Au collisions at√^(S)NN=27 Ge V,collected in 2018.The Au+Au data were prepared in the same manner intended for the isobar blind data.The details of the blind analysis procedure and results from the mock data challenge are presented.展开更多
Independent living and housing stability are core principles of the psychiatric recovery process.Only when basic needs such as safe,affordable and permanent housing are met can individuals with serious mental illnesse...Independent living and housing stability are core principles of the psychiatric recovery process.Only when basic needs such as safe,affordable and permanent housing are met can individuals with serious mental illnesses(SMI)reintegrate into their community,consistently engage with mental health services and begin(or restart)recovery.'Yet,post-discharged individuals with SMI and their psychiatric care providers often grapple with where to go after discharge from psychiatric hospitalisation.This question is particularly central in safety-net hospitals serving people affected by severe health disparities with myriad deficits in social determinants of health(SDoH).In this commentary,we aim to shed light on post-discharge challenges related to housing often encountered by safety-net psychiatric hospitals and propose ways to address them.展开更多
基金supported by R01 HL136918(to N.P.)STAR 2016 program(to GR)partly supported by the Italian Ministry of Education,Universities,and Research-Rita Levi Montalcini 2016(to AC)。
文摘Background Aging is a multifactorial process associated with an impairment of autonomic nervous system(ANS)function.Progressive ANS remodeling includes upregulation of expression of circulating catecholamines and depletion of cardiac autonomic nerve fibers,and it is responsible,in part,for the increased susceptibility to cardiac diseases observed in elderly subjects.Neurotrophic factors,such as brain-derived neurotrophic factor(BDNF)and nerve growth factor(NGF),are involved in synaptogenesis and neurite outgrowth processes,supporting neuronal cell differentiation and maturation.However,whether and how these factors and their downstream signaling are involved in cardiac aging remains unclear.Here,we tested whether,in the aged heart,the overall extent of autonomic fibers is reduced,owing to lower production of trophic factors such as BDNF and NGF.Methods In vivo,we used young(age:3 months;n=10)and old(age:24 months;n=11)male Fisher rats,whereas,we used human neuroblastoma(SH-SY5 Y)cells in vitro.Results Compared to the young rats,old rats displayed a marked reduction in the overall ANS fiber density,affecting both sympathetic and cholinergic compartments,as indicated by dopamineβ-hydroxylase(dβh)and vesicular acetylcholine transporter(Va Ch T)immunohistochemical staining.In addition,a marked downregulation of GAP-43 and BDNF protein was observed in the left ventricular lysates of old rats compared to those of young rats.Interestingly,we did not find any significant difference in cardiac NGF levels between the young and old groups.To further explore the impact of aging on ANS fibers,we treated SH-SY5 Y cells in vitro with serum obtained from young and old rats.Sera from both groups induced a remarkable increase in neuronal sprouting,as evidenced by a crystal violet assay.However,this effect was blunted in cells cultured with old rat serum and was accompanied by a marked reduction in GAP-43 and BDNF protein levels.Conclusions Our data indicate that physiological aging is associated with an impairment of ANS structure and function and that reduced BDNF levels are responsible,at least in part,for these phenomena.
基金supported by the start-up and OVPR seed Grant from Temple University
文摘Fast and sensitive detection of dilute rare earth species still represents a challenge for an on-site survey of new resources and evaluation of the economic value. In this work, a robust and low-cost protocol has been developed to analyze the concentration of rare earth ions using a smartphone camera. The success of this protocol relies on mesoporous silica nanoparticles(MSNs) with large-area negatively charged surfaces, on which the rare earth cations(e.g., Eu^(3+)) are efficiently adsorbed through electrostatic attraction to enable a ‘‘concentrating effect''. The initial adsorption rate is as fast as 4025 mg(g min)^(-1), and the adsorption capacity of Eu^(3+)ions in the MSNs is as high as 4730 mg g^(-1)(equivalent to ～41.2 M) at 70 °C. The concentrated Eu^(3+)ions in the MSNs can form a complex with a light sensitizer of 1,10-phenanthroline to significantly enhance the characteristic red emission of Eu^(3+)ions due to an ‘‘antenna effect'' that relies on the efficient energy transfer from the light sensitizer to the Eu^(3+)ions.The positive synergy of ‘‘concentrating effect'' and ‘‘antenna effect'' in the MSNs enables the analysis of rare earth ions in a wide dynamic range and with a detection limit down to ～80 nM even using a smartphone camera. Our results highlight the promise of the protocol in fieldwork for exploring valuable rare earth resources.
基金supported by the start-up from Temple University
文摘Photothermal catalysis represents a promising strategy to utilize the renewable energy source(e.g.,solar energy)to drive chemical reactions more efficiently.Successful and efficient photothermal catalysis relies on the availability of ideal photothermal catalysts,which can provide both large areas of catalytically active surface and strong light absorption power simultaneously.Such duplex requirements of a photothermal catalyst exhibit opposing dependence on the size of the catalyst nanoparticles,i.e.,smaller size is beneficial for achieving higher surface area and more active surface,whereas larger size favors the light absorption in the nanoparticles.In this article,we report the synthesis of ultrafine RuOOH nanoparticles with a size of 2–3 nm uniformly dispersed on the surfaces of silica(SiOx)nanospheres of hundreds of nanometers in size to tackle this challenge of forming an ideal photothermal catalyst.The ultrasmall RuOOH nanoparticles exhibit a large surface area as well as the ability to activate adsorbed molecular oxygen.The SiOx nanospheres exhibit strong surface light scattering resonances to enhance the light absorption power of the small RuOOH nanoparticles anchored on the SiOx surface.Therefore,the RuOOH/SiOx composite particles represent a new class of efficient photothermal catalysts with a photothermal energy conversion efficiency of 92.5%for selective aerobic oxidation of benzyl alcohol to benzylaldehyde under ambient conditions.
文摘Cardiac amyloidosis(CA)is caused by deposition of amyloid fibrils in the myocardium and has two main sub-types,transthyretin cardiac amyloidosis(ATTR)and immunoglobulin light chain cardiac amyloidosis(AL).ATTR is further dif-ferentiated into wild-type(wtATTR)and hereditary(hATTR),depending on the absence or presence of mutation in the trans-thyretin gene.The increased recognition of disease with the improvement in diagnostic armamentarium and serendipitous ad-vancements in the therapeutic landscape have changed the status of CA from being a rare and untreatable disease to being a not-so-rare and treatable disease.Both ATTR and AL have certain clinical aspects that can provide early clues for the disease.While electrocardiography followed by echocardiography and subsequently cardiac magnetic resonance can raise suspicion for CA,the definitive diagnosis of ATTR is non-invasively established by bone scintigraphy while that of AL always needs histological con-firmation.Severity of CA can be gauged by serum biomarker-based staging of both ATTR and AL.ATTR therapies work by silen-cing or stabilizing TTR or by degrading amyloid fibrils,while AL is managed with anti-plasma cell therapies and autologous stem cell transplant.
文摘In 2018,the STAR collaboration collected data from^(96)_(44)Ru+^(96)_(44)Ru and^(96)_(40)Zr+^(96)_(40)Zr at√^(S)NN=200 Ge V to search for the presence of the chiral magnetic effect in collisions of nuclei.The isobar collision species alternated frequently between 9644 Ru+^(96)_(44)Ru and^(96)_(40)Zr+^(96)_(40)Zr.In order to conduct blind analyses of studies related to the chiral magnetic effect in these isobar data,STAR developed a three-step blind analysis procedure.Analysts are initially provided a"reference sample"of data,comprised of a mix of events from the two species,the order of which respects time-dependent changes in run conditions.After tuning analysis codes and performing time-dependent quality assurance on the reference sample,analysts are provided a species-blind sample suitable for calculating efficiencies and corrections for individual≈30-min data-taking runs.For this sample,species-specific information is disguised,but individual output files contain data from a single isobar species.Only run-by-run corrections and code alteration subsequent to these corrections are allowed at this stage.Following these modifications,the"frozen"code is passed over the fully un-blind data,completing the blind analysis.As a check of the feasibility of the blind analysis procedure,analysts completed a"mock data challenge,"analyzing data from Au+Au collisions at√^(S)NN=27 Ge V,collected in 2018.The Au+Au data were prepared in the same manner intended for the isobar blind data.The details of the blind analysis procedure and results from the mock data challenge are presented.
文摘Independent living and housing stability are core principles of the psychiatric recovery process.Only when basic needs such as safe,affordable and permanent housing are met can individuals with serious mental illnesses(SMI)reintegrate into their community,consistently engage with mental health services and begin(or restart)recovery.'Yet,post-discharged individuals with SMI and their psychiatric care providers often grapple with where to go after discharge from psychiatric hospitalisation.This question is particularly central in safety-net hospitals serving people affected by severe health disparities with myriad deficits in social determinants of health(SDoH).In this commentary,we aim to shed light on post-discharge challenges related to housing often encountered by safety-net psychiatric hospitals and propose ways to address them.
