Partitioning of actinides from lanthanides is pivotal for advancing nuclear waste management and sustaining nuclear energy development,yet it remains a formidable challenge due to the intricate chemical behaviors of t...Partitioning of actinides from lanthanides is pivotal for advancing nuclear waste management and sustaining nuclear energy development,yet it remains a formidable challenge due to the intricate chemical behaviors of these f-block elements.In this study,we introduce 3,6-di-2-pyridyl-1,2,4,5-tetrazine(L1),whose hydrolysis product of pyridine-2-carbox-aldehyde(pyridine-2-carbonyl)-hydrazone(L2)can fractionally crystallize U(Ⅵ)ions over Ln(Ⅲ)cations with high selectivity and efficiency.Through hydrolysis-induced C–N bond cleavage,L2 acts as a tetradentate ligand,coordinating with two UO_(2)^(2+) ions in a planar arrangement to form a zerodimensional cluster,[(UO_(2))2(μ_(3)-O)(L2)(CH_(3)COO)]·DMF(U-L2),while lanthanide ions(Ln=La,Pr,Nd,Sm,Eu,Gd,Tb,Yb,and Lu)remain in solution due to their inability to achieve similar coordination.This selective crystallization strategy yields exceptional separation factors(SFs)between U(Ⅵ)and Ln(Ⅲ),with a value of 756276 between U(Ⅵ)and Sm(Ⅲ),the highest reported to date.Furthermore,this fractional crystallization separation process can be achieved under mild ambient conditions with high SFs,enabling the development of a rapid,safe and energy-efficient strategy for once-through separation of high oxidation state actinides from lanthanides.展开更多
Objective Several epidemiological observational studies have related particulate matter(PM)exposure to Inflammatory bowel disease(IBD),but many confounding factors make it difficult to draw causal links from observati...Objective Several epidemiological observational studies have related particulate matter(PM)exposure to Inflammatory bowel disease(IBD),but many confounding factors make it difficult to draw causal links from observational studies.The objective of this study was to explore the causal association between PM_(2.5)exposure,its absorbance,and IBD.Methods We assessed the association of PM_(2.5)and PM_(2.5)absorbance with the two primary forms of IBD(Crohn’s disease[CD]and ulcerative colitis[UC])using Mendelian randomization(MR)to explore the causal relationship.We conducted two-sample MR analyses with aggregated data from the UK Biobank genome-wide association study.Single-nucleotide polymorphisms linked with PM_(2.5)concentrations or their absorbance were used as instrumental variables(IVs).We used inverse variance weighting(IVW)as the primary analytical approach and four other standard methods as supplementary analyses for quality control.Results The results of MR demonstrated that PM_(2.5)had an adverse influence on UC risk(odds ratio[OR]=1.010;95%confidence interval[CI]=1.001–1.019,P=0.020).Meanwhile,the results of IVW showed that PM_(2.5)absorbance was also causally associated with UC(OR=1.012;95%CI=1.004–1.019,P=0.002).We observed no causal relationship between PM_(2.5),PM_(2.5)absorbance,and CD.The results of sensitivity analysis indicated the absence of heterogeneity or pleiotropy,ensuring the reliability of MR results.Conclusion Based on two-sample MR analyses,there are potential positive causal relationships between PM_(2.5),PM_(2.5)absorbance,and UC.展开更多
BACKGROUND Coronavirus disease 2019(COVID-19)is a global pandemic putting the population at a high risk of infection-related health hazards,mortality and a potential failure of proper medical therapies.Therefore,it is...BACKGROUND Coronavirus disease 2019(COVID-19)is a global pandemic putting the population at a high risk of infection-related health hazards,mortality and a potential failure of proper medical therapies.Therefore,it is necessary to evaluate the potential use of the existing drugs that could be used as options for the medical management of COVID-19 patients.AIM To evaluate the role of the H_(2) receptor blocker“famotidine”in COVID-19 illness.METHODS This study was done on seriously ill COVID-19 patients admitted to the intensive care unit(ICU)from different institutes in Bangladesh.Patients were divided into famotidine treatment group“A”(famotidine 40 mg to 60 mg oral formulation every 8 h with other treatment as given),and control group“B”(treatment as given).National early warning score(NEWS)-2,and sequential organ failure assessment day-1 score was calculated to evaluate the outcome.Outcomes were evaluated by the time required for clinical improvement,characterized as duration required from enrollment to the achievement of NEWS-2 of≤2 maintained for 24 h;time to symptomatic recovery,defined as the duration in days(from randomization)required for the recovery of the COVID-19 symptoms;mortality rate;duration of ICU and hospital stay;total period of hospitalization;the rate of supplementary oxygen requirement;the computed tomography(CT)chest recovery(%),the time required for the viral clearance and“NEWS-2”on discharge.RESULTS A total of 208 patients were enrolled in this study with 104 patients in each group.The famotidine treatment group had comparatively better recovery of 75%and a low mortality of 25%than the control with a recovery of 70%and a mortality of 30%.Duration of clinical improvement(group A 9.53 d,group B 14.21 d);hospitalization period among the recovered patients(group A 13.04 d,group B 16.31 d),pulmonary improvement in chest CT(group A 21.7%,group B 13.2%),and the time for viral clearance(group A 20.7 d,group B 23.8 d)were found to be statistically significant P≤0.05.However,the Kaplan Meier survival test was not significant among the two study groups,P=0.989.CONCLUSION According to our study,treatment with famotidine achieved a better clinical outcome compared to the control group in severe COVID-19 illness,although no significant survival benefit was found.展开更多
:Colorectal cancer(CRC)is a heterogeneous cancer,and many risk factors for colorectal cancer have been established.For CRC metastasis,tumor cell migration,adhesion as well as invasion are important processes.Wiskott-A...:Colorectal cancer(CRC)is a heterogeneous cancer,and many risk factors for colorectal cancer have been established.For CRC metastasis,tumor cell migration,adhesion as well as invasion are important processes.Wiskott-Aldrich syndrome protein family member 3(WASF3)is necessary for metastasis of various types of cancers.However,its role in CRC progression has not been fully elucidated.This study examined the in vitro functional roles of WASF3 in the CRC and explored the underlying molecular mechanisms.We used siRNA-WASF3 to gene silence WASF3 in colon cancer cell(HCT116)in vitro.The effects of WASF3 silencing on HCT116 cell apoptosis,proliferation,migration,as well as invasion were assessed by flow cytometry,CCK-8,and transwell assays.ZNF471 protein expressions were detected by immunofluorescence staining and RT-PCR.Moreover,the effects of ZNF471 were studied on a series of in vitro antitumor-promoting assays using HCT116.WASF3 knockdown expression using small interfering RNA(siRNA)ameliorated CRC cell proliferation,anchorage-independent growth,invasion,and metastasis.Furthermore,we observed that WASF3 contributed to upregulating the metastasis signaling pathway through inhibiting the expression of ZNF471.Our study suggests that targeting WASF3 signaling might be a novel therapeutic strategy for treating CRC.展开更多
基金supported by the National Natural Science Foundation of China(U22B20139,22322609,22076152,and 22476158).
文摘Partitioning of actinides from lanthanides is pivotal for advancing nuclear waste management and sustaining nuclear energy development,yet it remains a formidable challenge due to the intricate chemical behaviors of these f-block elements.In this study,we introduce 3,6-di-2-pyridyl-1,2,4,5-tetrazine(L1),whose hydrolysis product of pyridine-2-carbox-aldehyde(pyridine-2-carbonyl)-hydrazone(L2)can fractionally crystallize U(Ⅵ)ions over Ln(Ⅲ)cations with high selectivity and efficiency.Through hydrolysis-induced C–N bond cleavage,L2 acts as a tetradentate ligand,coordinating with two UO_(2)^(2+) ions in a planar arrangement to form a zerodimensional cluster,[(UO_(2))2(μ_(3)-O)(L2)(CH_(3)COO)]·DMF(U-L2),while lanthanide ions(Ln=La,Pr,Nd,Sm,Eu,Gd,Tb,Yb,and Lu)remain in solution due to their inability to achieve similar coordination.This selective crystallization strategy yields exceptional separation factors(SFs)between U(Ⅵ)and Ln(Ⅲ),with a value of 756276 between U(Ⅵ)and Sm(Ⅲ),the highest reported to date.Furthermore,this fractional crystallization separation process can be achieved under mild ambient conditions with high SFs,enabling the development of a rapid,safe and energy-efficient strategy for once-through separation of high oxidation state actinides from lanthanides.
基金supported by the National Natural Science Foundation of China(No.82303169)the Key Research and Development Program of Shaanxi(No.2021ZDLSF02-06).
文摘Objective Several epidemiological observational studies have related particulate matter(PM)exposure to Inflammatory bowel disease(IBD),but many confounding factors make it difficult to draw causal links from observational studies.The objective of this study was to explore the causal association between PM_(2.5)exposure,its absorbance,and IBD.Methods We assessed the association of PM_(2.5)and PM_(2.5)absorbance with the two primary forms of IBD(Crohn’s disease[CD]and ulcerative colitis[UC])using Mendelian randomization(MR)to explore the causal relationship.We conducted two-sample MR analyses with aggregated data from the UK Biobank genome-wide association study.Single-nucleotide polymorphisms linked with PM_(2.5)concentrations or their absorbance were used as instrumental variables(IVs).We used inverse variance weighting(IVW)as the primary analytical approach and four other standard methods as supplementary analyses for quality control.Results The results of MR demonstrated that PM_(2.5)had an adverse influence on UC risk(odds ratio[OR]=1.010;95%confidence interval[CI]=1.001–1.019,P=0.020).Meanwhile,the results of IVW showed that PM_(2.5)absorbance was also causally associated with UC(OR=1.012;95%CI=1.004–1.019,P=0.002).We observed no causal relationship between PM_(2.5),PM_(2.5)absorbance,and CD.The results of sensitivity analysis indicated the absence of heterogeneity or pleiotropy,ensuring the reliability of MR results.Conclusion Based on two-sample MR analyses,there are potential positive causal relationships between PM_(2.5),PM_(2.5)absorbance,and UC.
基金the support and cooperation of The First Affiliated Hospital of Xi’an Jiaotong University
文摘BACKGROUND Coronavirus disease 2019(COVID-19)is a global pandemic putting the population at a high risk of infection-related health hazards,mortality and a potential failure of proper medical therapies.Therefore,it is necessary to evaluate the potential use of the existing drugs that could be used as options for the medical management of COVID-19 patients.AIM To evaluate the role of the H_(2) receptor blocker“famotidine”in COVID-19 illness.METHODS This study was done on seriously ill COVID-19 patients admitted to the intensive care unit(ICU)from different institutes in Bangladesh.Patients were divided into famotidine treatment group“A”(famotidine 40 mg to 60 mg oral formulation every 8 h with other treatment as given),and control group“B”(treatment as given).National early warning score(NEWS)-2,and sequential organ failure assessment day-1 score was calculated to evaluate the outcome.Outcomes were evaluated by the time required for clinical improvement,characterized as duration required from enrollment to the achievement of NEWS-2 of≤2 maintained for 24 h;time to symptomatic recovery,defined as the duration in days(from randomization)required for the recovery of the COVID-19 symptoms;mortality rate;duration of ICU and hospital stay;total period of hospitalization;the rate of supplementary oxygen requirement;the computed tomography(CT)chest recovery(%),the time required for the viral clearance and“NEWS-2”on discharge.RESULTS A total of 208 patients were enrolled in this study with 104 patients in each group.The famotidine treatment group had comparatively better recovery of 75%and a low mortality of 25%than the control with a recovery of 70%and a mortality of 30%.Duration of clinical improvement(group A 9.53 d,group B 14.21 d);hospitalization period among the recovered patients(group A 13.04 d,group B 16.31 d),pulmonary improvement in chest CT(group A 21.7%,group B 13.2%),and the time for viral clearance(group A 20.7 d,group B 23.8 d)were found to be statistically significant P≤0.05.However,the Kaplan Meier survival test was not significant among the two study groups,P=0.989.CONCLUSION According to our study,treatment with famotidine achieved a better clinical outcome compared to the control group in severe COVID-19 illness,although no significant survival benefit was found.
基金Key Research and Development Program of Shaanxi(Program No.2019SF-023)Basic Research Program of Natural Science in Shaanxi Province(Program No.2020JM-381)for their financial support.
文摘:Colorectal cancer(CRC)is a heterogeneous cancer,and many risk factors for colorectal cancer have been established.For CRC metastasis,tumor cell migration,adhesion as well as invasion are important processes.Wiskott-Aldrich syndrome protein family member 3(WASF3)is necessary for metastasis of various types of cancers.However,its role in CRC progression has not been fully elucidated.This study examined the in vitro functional roles of WASF3 in the CRC and explored the underlying molecular mechanisms.We used siRNA-WASF3 to gene silence WASF3 in colon cancer cell(HCT116)in vitro.The effects of WASF3 silencing on HCT116 cell apoptosis,proliferation,migration,as well as invasion were assessed by flow cytometry,CCK-8,and transwell assays.ZNF471 protein expressions were detected by immunofluorescence staining and RT-PCR.Moreover,the effects of ZNF471 were studied on a series of in vitro antitumor-promoting assays using HCT116.WASF3 knockdown expression using small interfering RNA(siRNA)ameliorated CRC cell proliferation,anchorage-independent growth,invasion,and metastasis.Furthermore,we observed that WASF3 contributed to upregulating the metastasis signaling pathway through inhibiting the expression of ZNF471.Our study suggests that targeting WASF3 signaling might be a novel therapeutic strategy for treating CRC.
