OBJECTIVE： To assess the role of cytotoxin-associated gene-A （CagA） positive strains of Helicobacter pylori （Hp） in ischemic stroke （IS） subtypes. DATA SOURCES： A computer-based online search of PubMed, EMBASE...OBJECTIVE： To assess the role of cytotoxin-associated gene-A （CagA） positive strains of Helicobacter pylori （Hp） in ischemic stroke （IS） subtypes. DATA SOURCES： A computer-based online search of PubMed, EMBASE, the Cochrane Collaboration database, the CNKI database and the VIP database, from January 1997 to July 2010, was performed to find relevant studies. DATA SELECTION： Case-control studies relevant to CagA with IS and IS subtypes were selected. Data regarding related factors in the case group and control group were acquired using the same approach. All patients had been diagnosed as exhibiting IS using skull CT or MRI, and were etiologically typed according to the 1993 TOAST diagnosis criteria. Two investigators independently performed the same search and study selection. Meta-analyses were then performed for the selected studies using RevMan 5.0 software （Cochrane Collaboration） after strict screening. Heterogeneity tests, sensitivity analyses and publication bias assessments were then conducted. MAIN OUTCOME MEASURES： Relationship of CagA with IS and IS subtypes. RESULTS： Eight studies were selected, involving data from 879 patients with IS, and 849 healthy controls. Five out of eight of the selected studies were related to large artery atherosclerosis （461 patients with IS and 497 health controls）. The results of our meta-analysis revealed a significant association between prior infection with CagA-positive strains and increased risk of IS （odds ratio （OR） = 2.31,95% confidence interval （C/）： 1.89-2.82, P 〈 0.01）, In addition, we found an association between infection with CagA-negative strains and IS （OR = 0.57, 95%C1：0.47 0.70, P 〈 0.01）. CagA positive and negative strains were found to correlate with large artery atherosclerosis （CagA-positive strains： OR = 2.87, 95%C/： 2.19-3.77, P 〈 0.01; CagA-negative strains： OR = 0.51, 95%CL 0.39 0.67, P 〈 0.01）. Because of the diversity of etiological factors in the case-control study, we conducted further analyses after correcting for confounding factors, and the overall effects were recalculated. The results revealed significant relationships between CagA-positive strains and IS （OR = 2.36, 95%C1： 1.84-3.02, P 〈 0.01）, and between CagA-positive strains and large artery atherosclerosis （OR = 3.10, 95%C1： 2.29-4.19, P 〈 0.01 ）. A heterogeneity test of CagA-positive strains in IS and its subtypes revealed good homogeneity （f = 0%; f = 0%） and we adopted a fixed-effects model to calculate OR. Sensitivity analysis confirmed that the results of the meta-analysis were reliable. However, the funnel plot suggested that the experimental results may be affected by bias, possibly resulting from a lack of published studies reporting negative outcomes in the meta-analysis. CONCLUSION： Infection with CagA-positive strains is a risk factor for IS, especially the large artery atherosclerosis subtype. However, the evidence from case-control studies is weak, and more prospective studies are required to conclusively determine whether infection by CagA-positive strains should be considered a novel risk factor for IS and its subtypes.展开更多
Background: Dry eye syndrome, which affects 10% to 20% of adults, is a disorder of the tear film and is associated with symptoms of ocular discomfort. Smart Plug is a mechanical treatment in which the tear drainage sy...Background: Dry eye syndrome, which affects 10% to 20% of adults, is a disorder of the tear film and is associated with symptoms of ocular discomfort. Smart Plug is a mechanical treatment in which the tear drainage system is blocked in order to aid in the preservation of natural tears on the ocular surface. Purpose: To evaluate the long-term clinical efficacy of Smart Plug in the treatment of aqueous tear deficiency dry eye. Patients and Methods: Retrospective study. Three hundred and two patients with aqueous tear deficiency dry eye were enrolled and all the patients accepted the punctual plug of Smart plug from Jan. 2011 to Jan. 2016. The clinical symptoms, Schirmer’s I test, Fluorescein staining (FL), tear break up time (TBUT), and complications were observed and analyzed. Results: Three hundred and two patients (604 eyes) were treated with Smart Plug (22 cases accepted upper and lower punctual plug, 280 cases only lower punctual plug). There were 109 males (36.1%) and 193 females (63.9%) with a mean age of 44.54 years old (Range from 25 to 83 years). Ten cases required the upper Smart Plug after lower punctual plug insertion because of no significantly improved symptoms. Smart plug was removed in 3 patients (1%) due to tearing. Six patients had mild postoperative tearing and no special treatment was required. Lacrimal canaliculitis occurred postoperatively in 8 cases (2.6%) (6 lower and 2 upper), and the affected plug was removed and treated with topical antibiotic eye drops. The BUT, SIT and FL scores of all patients were significantly improved from (2.11 ± 1.01, 4.20 ± 1.07, 6.06 ± 1.97) to (4.34 ± 1.22, 9.01 ± 1.56, 2.33 ± 1.28) respectively after at least 36 months of follow-up (All P P Conclusion: During a mean follow-up of 4.3 years, Smart plug is an effective method for the treatment of aqueous tear deficiency dry eye in spite of its postoperative complications such as canaliculitis and tearing.展开更多
Previous studies have demonstrated that Helicobacterpylori infection is associated with coronary atherosclerotic heart disease, but the correlation between Helicobacterpylori infection and ischemic stroke remains uncl...Previous studies have demonstrated that Helicobacterpylori infection is associated with coronary atherosclerotic heart disease, but the correlation between Helicobacterpylori infection and ischemic stroke remains unclear. The present study assessed the effects of Helicobacter pylori infection on atherothrombotic stroke. This study included 115 individuals with atherothrombotic stroke, all of whom were patients receiving treatment at the Department of Neurology, Aerospace Central Hospital （Aerospace Clinical Medical College Affiliated to Peking University） in China, from March 2006 to July 2009. In addition, 131 controls without the history of cardiovascular disease, cerebrovascular disease or atherothrombosis were also enrolled in the study. Results show that the Helicobacterpylori-lgG positive rate was greater in the atherothrombotic stroke patients than in the controls, but the difference was not statistically significant （67.8% vs. 61.8%, OR = 1.301,95%C/： 0.769-2.203, P = 0.327）. After correction for potential risk factors for Helicobacter pylori infection and known risk factors for ischemic stroke, no significant difference was detected between them （OR = 1.278, 95%C1： 0.667-2.449, P = 0.459）. These results indicate that there is no specific correlation between Helicobacterpylori infection and atherothrombotic stroke. This finding requires further verification in large-sample prospective studies.展开更多
Background: The potential impact of β cell function and insulin sensitivity on adverse pregnancy outcomes in women with gestational diabetes mellitus (GDM) remains uncertain. We aimed to investigate the association b...Background: The potential impact of β cell function and insulin sensitivity on adverse pregnancy outcomes in women with gestational diabetes mellitus (GDM) remains uncertain. We aimed to investigate the association between β cell dysfunction, insulin resistance, and the composite adverse pregnancy outcomes.Methods: This observational study included 482 women diagnosed with GDM during pregnancy. Quantitative metrics on β cell function and insulin sensitivity during pregnancy were calculated using traditional equations. The association of β cell dysfunction and insulin resistance with the risk of the composite adverse pregnancy outcomes was investigated using multivariable-adjusted logistic regression models.Results: Multivariable-adjusted odds ratios (ORs) of adverse pregnancy outcomes across quartiles of homeostatic model assessment for insulin resistance (HOMA-IR) were 1.00, 0.95, 1.34, and 2.25, respectively (P for trend = 0.011). When HOMA-IR was considered as a continuous variable, the multivariable-adjusted OR of adverse pregnancy outcomes was 1.34 (95% confidence interval 1.16-1.56) for each 1-unit increase in HOMA-IR. Multivariable-adjusted ORs of adverse pregnancy outcomes across quartiles of homeostatic model assessment for β cell function (HOMA-β) were 1.00, 0.51, 0.60, and 0.53, respectively (P for trend = 0.068). When HOMA-β was considered as a continuous variable, the multivariable-adjusted OR of adverse pregnancy outcomes was 0.57 (95% CI 0.24-0.90) for each 1-unit increase in HOMA-β. However, other quantitative metrics were not associated with the composite adverse pregnancy outcomes.Conclusions: We demonstrated a significant association of β cell function and insulin sensitivity with the risk of adverse pregnancy outcomes. We have provided additional evidence on the early identification of adverse pregnancy outcomes besides the glycemic values.展开更多
During the COVID-19 epidemic,the treatment of critically ill patients has been increasingly difficult and challenging.During the epidemic,some patients with neurological diseases also have COVID-19,which could be misd...During the COVID-19 epidemic,the treatment of critically ill patients has been increasingly difficult and challenging.During the epidemic,some patients with neurological diseases also have COVID-19,which could be misdiagnosed and cause silent transmission and nosocomial infection.Such risk is high in a neurological intensive care unit(NCU).Therefore,prevention and control of epidemic in critically ill patients is of utmost importance.The principle of NCU care should include comprehensive screening and risk assessment,weighing risk against benefits and reducing the risk of COVID-19 transmission while treating patients as promptly as possible.展开更多
Remarkable progress has been made in developing intramuscular vaccines against severe acute respiratory syndrome coronavirus 2(SARS-CoV-2);however,they are limited with respect to eliciting local immunity in the respi...Remarkable progress has been made in developing intramuscular vaccines against severe acute respiratory syndrome coronavirus 2(SARS-CoV-2);however,they are limited with respect to eliciting local immunity in the respiratory tract,which is the primary infection site for SARS-CoV-2.To overcome the limitations of intramuscular vaccines,we constructed a nasal vaccine candidate based on an influenza vector by inserting a gene encoding the receptor-binding domain(RBD)of the spike protein of SARSCoV-2,named CA4-d NS1-n CoV-RBD(d NS1-RBD).A preclinical study showed that in hamsters challenged 1d after single-dose vaccination or 9 months after booster vaccination,d NS1-RBD largely mitigated lung pathology,with no loss of body weight.Moreover,such cellular immunity is relatively unimpaired for the most concerning SARS-Co V-2 variants,especially for the latest Omicron variant.In addition,this vaccine also provides cross-protection against H1N1 and H5N1 influenza viruses.The protective immune mechanism of d NS1-RBD could be attributed to the innate immune response in the nasal epithelium,local RBD-specific T cell response in the lung,and RBD-specific Ig A and Ig G response.Thus,this study demonstrates that the intranasally delivered d NS1-RBD vaccine candidate may offer an important addition to the fight against the ongoing coronavirus disease 2019 pandemic and influenza infection,compensating limitations of current intramuscular vaccines.展开更多
Previous genetic fate-mapping studies have indicated that embryonic glial fibrillary acidic protein- positive （GFAP＋） cells are multifunctional progenitor/ neural stem cells that can produce astrocytes as well as n...Previous genetic fate-mapping studies have indicated that embryonic glial fibrillary acidic protein- positive （GFAP＋） cells are multifunctional progenitor/ neural stem cells that can produce astrocytes as well as neurons and oligodendrocytes throughout the adult mouse central nervous system （CNS）. However, emerging evi- dence from recent studies indicates that GFAP＋ cells adopt different cell fates and generate different cell types in different regions. Moreover, the fate of GFAP＋ cells in the young adult mouse CNS is not well understood. In the present study, hGFAP-Cre/R26R transgenic mice were used to investigate the lineage of embryonic GFAP＋ cells in the young adult mouse CNS. At postnatal day 21, we found that GFAP＋ cells mainly generated NeuN＋ neurons in the cerebral cortex （both ventral and dorsal）, hippocam- pus, and cerebellum. Strangely, these cells were negative for the Purkinje cell marker calbindin in the cerebellum and the neuronal marker NeuN in the thalamus. Thus, contrary to previous studies, our genetic fate-mapping revealed that the cell fate of embryonic GFAP＋ cells at the young adult stage is significantly different from that at the adult stage.展开更多
Graphitic carbon nitride(g-C3N4)has attracted considerable attention due to its special structure and properties,such as its good chemical and thermal stability under ambient conditions,low cost and non-toxicity,and f...Graphitic carbon nitride(g-C3N4)has attracted considerable attention due to its special structure and properties,such as its good chemical and thermal stability under ambient conditions,low cost and non-toxicity,and facile synthesis.Recently,g-C3N4-based sensors have been demonstrated to be of high interests in the areas of sensing due to the unique optical,electronic and catalytic properties of g-C3N4.This review focuses on the most salient advances in luminescent sensors based on g-C3N4,chemiluminescence,cataluminescence and electrochemiluminescence methods are discussed.This review provides valuable information for researchers of related areas and thus may inspire the development of more practical and effective approaches for designing two-dimensional(2D)nanomaterial-assisted luminescent sensors.展开更多
Vaccination is the most effective and feasible way to contain the coronavirus disease 2019(COVID-19)pandemic.The rapid development of effective COVID-19 vaccines is an extraordinary achievement.This study reviewed the...Vaccination is the most effective and feasible way to contain the coronavirus disease 2019(COVID-19)pandemic.The rapid development of effective COVID-19 vaccines is an extraordinary achievement.This study reviewed the efficacy/effectiveness,immunogenicity,and safety profile of the 12 most progressed COVID-19 vaccines and discussed the challenges and prospects of the vaccine-based approaches in a global crisis.Overall,most of the current vaccines have shown safety and efficacy/effectiveness during actual clinical trials or in the real-world studies,indicating a development of pandemic control.However,many challenges are faced by pandemic control in terms of maximizing the effect of vaccines,such as rapid vaccine coverage,strategies to address variants with immune escape capability,and surveillance of vaccine safety in the medium-and long-terms.展开更多
基金School-level Foundation,No. 200503Ministry Youth Innovation Fund Project,No. 200901
文摘OBJECTIVE： To assess the role of cytotoxin-associated gene-A （CagA） positive strains of Helicobacter pylori （Hp） in ischemic stroke （IS） subtypes. DATA SOURCES： A computer-based online search of PubMed, EMBASE, the Cochrane Collaboration database, the CNKI database and the VIP database, from January 1997 to July 2010, was performed to find relevant studies. DATA SELECTION： Case-control studies relevant to CagA with IS and IS subtypes were selected. Data regarding related factors in the case group and control group were acquired using the same approach. All patients had been diagnosed as exhibiting IS using skull CT or MRI, and were etiologically typed according to the 1993 TOAST diagnosis criteria. Two investigators independently performed the same search and study selection. Meta-analyses were then performed for the selected studies using RevMan 5.0 software （Cochrane Collaboration） after strict screening. Heterogeneity tests, sensitivity analyses and publication bias assessments were then conducted. MAIN OUTCOME MEASURES： Relationship of CagA with IS and IS subtypes. RESULTS： Eight studies were selected, involving data from 879 patients with IS, and 849 healthy controls. Five out of eight of the selected studies were related to large artery atherosclerosis （461 patients with IS and 497 health controls）. The results of our meta-analysis revealed a significant association between prior infection with CagA-positive strains and increased risk of IS （odds ratio （OR） = 2.31,95% confidence interval （C/）： 1.89-2.82, P 〈 0.01）, In addition, we found an association between infection with CagA-negative strains and IS （OR = 0.57, 95%C1：0.47 0.70, P 〈 0.01）. CagA positive and negative strains were found to correlate with large artery atherosclerosis （CagA-positive strains： OR = 2.87, 95%C/： 2.19-3.77, P 〈 0.01; CagA-negative strains： OR = 0.51, 95%CL 0.39 0.67, P 〈 0.01）. Because of the diversity of etiological factors in the case-control study, we conducted further analyses after correcting for confounding factors, and the overall effects were recalculated. The results revealed significant relationships between CagA-positive strains and IS （OR = 2.36, 95%C1： 1.84-3.02, P 〈 0.01）, and between CagA-positive strains and large artery atherosclerosis （OR = 3.10, 95%C1： 2.29-4.19, P 〈 0.01 ）. A heterogeneity test of CagA-positive strains in IS and its subtypes revealed good homogeneity （f = 0%; f = 0%） and we adopted a fixed-effects model to calculate OR. Sensitivity analysis confirmed that the results of the meta-analysis were reliable. However, the funnel plot suggested that the experimental results may be affected by bias, possibly resulting from a lack of published studies reporting negative outcomes in the meta-analysis. CONCLUSION： Infection with CagA-positive strains is a risk factor for IS, especially the large artery atherosclerosis subtype. However, the evidence from case-control studies is weak, and more prospective studies are required to conclusively determine whether infection by CagA-positive strains should be considered a novel risk factor for IS and its subtypes.
文摘Background: Dry eye syndrome, which affects 10% to 20% of adults, is a disorder of the tear film and is associated with symptoms of ocular discomfort. Smart Plug is a mechanical treatment in which the tear drainage system is blocked in order to aid in the preservation of natural tears on the ocular surface. Purpose: To evaluate the long-term clinical efficacy of Smart Plug in the treatment of aqueous tear deficiency dry eye. Patients and Methods: Retrospective study. Three hundred and two patients with aqueous tear deficiency dry eye were enrolled and all the patients accepted the punctual plug of Smart plug from Jan. 2011 to Jan. 2016. The clinical symptoms, Schirmer’s I test, Fluorescein staining (FL), tear break up time (TBUT), and complications were observed and analyzed. Results: Three hundred and two patients (604 eyes) were treated with Smart Plug (22 cases accepted upper and lower punctual plug, 280 cases only lower punctual plug). There were 109 males (36.1%) and 193 females (63.9%) with a mean age of 44.54 years old (Range from 25 to 83 years). Ten cases required the upper Smart Plug after lower punctual plug insertion because of no significantly improved symptoms. Smart plug was removed in 3 patients (1%) due to tearing. Six patients had mild postoperative tearing and no special treatment was required. Lacrimal canaliculitis occurred postoperatively in 8 cases (2.6%) (6 lower and 2 upper), and the affected plug was removed and treated with topical antibiotic eye drops. The BUT, SIT and FL scores of all patients were significantly improved from (2.11 ± 1.01, 4.20 ± 1.07, 6.06 ± 1.97) to (4.34 ± 1.22, 9.01 ± 1.56, 2.33 ± 1.28) respectively after at least 36 months of follow-up (All P P Conclusion: During a mean follow-up of 4.3 years, Smart plug is an effective method for the treatment of aqueous tear deficiency dry eye in spite of its postoperative complications such as canaliculitis and tearing.
基金Supported by the School-level Foundation, No. 200503
文摘Previous studies have demonstrated that Helicobacterpylori infection is associated with coronary atherosclerotic heart disease, but the correlation between Helicobacterpylori infection and ischemic stroke remains unclear. The present study assessed the effects of Helicobacter pylori infection on atherothrombotic stroke. This study included 115 individuals with atherothrombotic stroke, all of whom were patients receiving treatment at the Department of Neurology, Aerospace Central Hospital （Aerospace Clinical Medical College Affiliated to Peking University） in China, from March 2006 to July 2009. In addition, 131 controls without the history of cardiovascular disease, cerebrovascular disease or atherothrombosis were also enrolled in the study. Results show that the Helicobacterpylori-lgG positive rate was greater in the atherothrombotic stroke patients than in the controls, but the difference was not statistically significant （67.8% vs. 61.8%, OR = 1.301,95%C/： 0.769-2.203, P = 0.327）. After correction for potential risk factors for Helicobacter pylori infection and known risk factors for ischemic stroke, no significant difference was detected between them （OR = 1.278, 95%C1： 0.667-2.449, P = 0.459）. These results indicate that there is no specific correlation between Helicobacterpylori infection and atherothrombotic stroke. This finding requires further verification in large-sample prospective studies.
基金supported by grants from the Shanghai Health and Family Planning Commission(Nos.20184Y0362,20204Y0431)the Shanghai Municipal Education Commission–Gaofeng Clinical Medicine Grant Support(No.20161430)supported by the funding of retrospective studies from Shanghai Sixth People’s Hospital.
文摘Background: The potential impact of β cell function and insulin sensitivity on adverse pregnancy outcomes in women with gestational diabetes mellitus (GDM) remains uncertain. We aimed to investigate the association between β cell dysfunction, insulin resistance, and the composite adverse pregnancy outcomes.Methods: This observational study included 482 women diagnosed with GDM during pregnancy. Quantitative metrics on β cell function and insulin sensitivity during pregnancy were calculated using traditional equations. The association of β cell dysfunction and insulin resistance with the risk of the composite adverse pregnancy outcomes was investigated using multivariable-adjusted logistic regression models.Results: Multivariable-adjusted odds ratios (ORs) of adverse pregnancy outcomes across quartiles of homeostatic model assessment for insulin resistance (HOMA-IR) were 1.00, 0.95, 1.34, and 2.25, respectively (P for trend = 0.011). When HOMA-IR was considered as a continuous variable, the multivariable-adjusted OR of adverse pregnancy outcomes was 1.34 (95% confidence interval 1.16-1.56) for each 1-unit increase in HOMA-IR. Multivariable-adjusted ORs of adverse pregnancy outcomes across quartiles of homeostatic model assessment for β cell function (HOMA-β) were 1.00, 0.51, 0.60, and 0.53, respectively (P for trend = 0.068). When HOMA-β was considered as a continuous variable, the multivariable-adjusted OR of adverse pregnancy outcomes was 0.57 (95% CI 0.24-0.90) for each 1-unit increase in HOMA-β. However, other quantitative metrics were not associated with the composite adverse pregnancy outcomes.Conclusions: We demonstrated a significant association of β cell function and insulin sensitivity with the risk of adverse pregnancy outcomes. We have provided additional evidence on the early identification of adverse pregnancy outcomes besides the glycemic values.
文摘During the COVID-19 epidemic,the treatment of critically ill patients has been increasingly difficult and challenging.During the epidemic,some patients with neurological diseases also have COVID-19,which could be misdiagnosed and cause silent transmission and nosocomial infection.Such risk is high in a neurological intensive care unit(NCU).Therefore,prevention and control of epidemic in critically ill patients is of utmost importance.The principle of NCU care should include comprehensive screening and risk assessment,weighing risk against benefits and reducing the risk of COVID-19 transmission while treating patients as promptly as possible.
基金supported by the National Program on Key Research Project of China(2020YFC0842600)the National Natural Science Foundation of China(82041038,81871651,and 81991491)+1 种基金the Major Science and Technology Program of Fujian Province(2020YZ014001)the Natural Science Foundation of Fujian Province(2021J02006)。
文摘Remarkable progress has been made in developing intramuscular vaccines against severe acute respiratory syndrome coronavirus 2(SARS-CoV-2);however,they are limited with respect to eliciting local immunity in the respiratory tract,which is the primary infection site for SARS-CoV-2.To overcome the limitations of intramuscular vaccines,we constructed a nasal vaccine candidate based on an influenza vector by inserting a gene encoding the receptor-binding domain(RBD)of the spike protein of SARSCoV-2,named CA4-d NS1-n CoV-RBD(d NS1-RBD).A preclinical study showed that in hamsters challenged 1d after single-dose vaccination or 9 months after booster vaccination,d NS1-RBD largely mitigated lung pathology,with no loss of body weight.Moreover,such cellular immunity is relatively unimpaired for the most concerning SARS-Co V-2 variants,especially for the latest Omicron variant.In addition,this vaccine also provides cross-protection against H1N1 and H5N1 influenza viruses.The protective immune mechanism of d NS1-RBD could be attributed to the innate immune response in the nasal epithelium,local RBD-specific T cell response in the lung,and RBD-specific Ig A and Ig G response.Thus,this study demonstrates that the intranasally delivered d NS1-RBD vaccine candidate may offer an important addition to the fight against the ongoing coronavirus disease 2019 pandemic and influenza infection,compensating limitations of current intramuscular vaccines.
基金supported by the National Youth Fund of China(81400931)a Public Support Project of the Science and Technology Department of Zhejiang Province(2013C37001)
文摘Previous genetic fate-mapping studies have indicated that embryonic glial fibrillary acidic protein- positive （GFAP＋） cells are multifunctional progenitor/ neural stem cells that can produce astrocytes as well as neurons and oligodendrocytes throughout the adult mouse central nervous system （CNS）. However, emerging evi- dence from recent studies indicates that GFAP＋ cells adopt different cell fates and generate different cell types in different regions. Moreover, the fate of GFAP＋ cells in the young adult mouse CNS is not well understood. In the present study, hGFAP-Cre/R26R transgenic mice were used to investigate the lineage of embryonic GFAP＋ cells in the young adult mouse CNS. At postnatal day 21, we found that GFAP＋ cells mainly generated NeuN＋ neurons in the cerebral cortex （both ventral and dorsal）, hippocam- pus, and cerebellum. Strangely, these cells were negative for the Purkinje cell marker calbindin in the cerebellum and the neuronal marker NeuN in the thalamus. Thus, contrary to previous studies, our genetic fate-mapping revealed that the cell fate of embryonic GFAP＋ cells at the young adult stage is significantly different from that at the adult stage.
基金the National Natural Science Foundation of China[nos.21405107 and 21375089].
文摘Graphitic carbon nitride(g-C3N4)has attracted considerable attention due to its special structure and properties,such as its good chemical and thermal stability under ambient conditions,low cost and non-toxicity,and facile synthesis.Recently,g-C3N4-based sensors have been demonstrated to be of high interests in the areas of sensing due to the unique optical,electronic and catalytic properties of g-C3N4.This review focuses on the most salient advances in luminescent sensors based on g-C3N4,chemiluminescence,cataluminescence and electrochemiluminescence methods are discussed.This review provides valuable information for researchers of related areas and thus may inspire the development of more practical and effective approaches for designing two-dimensional(2D)nanomaterial-assisted luminescent sensors.
基金supported by the National Natural Science Foundation of China(No.81991491)the Fujian Natural Science Foundation for Distinguished Young Scholars(No.2020J06007)the Bill and Melinda Gates Foundation(No.INV-005834).
文摘Vaccination is the most effective and feasible way to contain the coronavirus disease 2019(COVID-19)pandemic.The rapid development of effective COVID-19 vaccines is an extraordinary achievement.This study reviewed the efficacy/effectiveness,immunogenicity,and safety profile of the 12 most progressed COVID-19 vaccines and discussed the challenges and prospects of the vaccine-based approaches in a global crisis.Overall,most of the current vaccines have shown safety and efficacy/effectiveness during actual clinical trials or in the real-world studies,indicating a development of pandemic control.However,many challenges are faced by pandemic control in terms of maximizing the effect of vaccines,such as rapid vaccine coverage,strategies to address variants with immune escape capability,and surveillance of vaccine safety in the medium-and long-terms.
