Purpose: Descending necrotizing mediastinitis(DNM) is a lethal and acute suppurative disease. This report aimed to summarize our experience in the treatment of DNM with continuous negative pressure catheter drainage a...Purpose: Descending necrotizing mediastinitis(DNM) is a lethal and acute suppurative disease. This report aimed to summarize our experience in the treatment of DNM with continuous negative pressure catheter drainage and transnasal jejunal feeding by interventional techniques. Materials and Methods: We retrospectively analyzed relevant clinical data of patients with DNM who underwent continuous negative pressure catheter drainage and transnasal jejunal feeding. All drainage catheters and jejunal feeding tubes were inserte d by interventional techniques. Results: In total, 21 patients were diagnosed with DNM by esophagography and computed tomography(CT). Catheters for the drainage of mediastinal abscesses as well as transnasal jejunal feeding tubes were successfully placed in all patients, indicating a 100% success rate. Of all patients, 13 underwent insertion of abscess drainage catheters through percutaneous puncture under DynaCT guidance, while eight had drainage catheter insertion through fistula orifices in the posterior nasopharyngeal wall or esophagus under fluoroscopic guidance. In total, 26 drainage tubes were inserted. One patient with diabetes died of sepsis and diabetic ketoacidosis 5 days postoperatively, while the remaining 20 patients showed good recovery with successful removal of the drainage catheters. Durations of catheterization were 45.2±50.44 days. The overall clinical success rate was 95.2%. Conclusion: The above described methods are non-surgical, minimally invasive and efficacious, and may be alternative therapeutic tools for patients who are not eligible for surgical operation, have a high postoperative risk, or are more likely to choose minimally invasive techniques.展开更多
Currently,the incidence and fatality rate of SARS-CoV-2 remain continually high worldwide.COVID-19 patients infected with SARS-CoV-2 exhibited decreased type I interferon(IFN-I)signal,along with limited activation of ...Currently,the incidence and fatality rate of SARS-CoV-2 remain continually high worldwide.COVID-19 patients infected with SARS-CoV-2 exhibited decreased type I interferon(IFN-I)signal,along with limited activation of antiviral immune responses as well as enhanced viral infectivity.Dramatic progresses have been made in revealing the multiple strategies employed by SARS-CoV-2 in impairing canonical RNA sensing pathways.However,it remains to be determined about the SARS-CoV-2 antagonism of cGAS-mediated activation of IFN responses during infection.In the current study,we figure out that SARS-CoV-2 infection leads to the accumulation of released mitochondria DNA(mtDNA),which in turn triggers cGAS to activate IFN-I signaling.As countermeasures,SARS-CoV-2 nucleocapsid(N)protein restricts the DNA recognition capacity of cGAS to impair cGAS-induced IFN-I signaling.Mechanically,N protein disrupts the assembly of cGAS with its co-factor G3BP1 by undergoing DNA-induced liquid-liquid phase separation(LLPS),subsequently impairs the double-strand DNA(dsDNA)detection ability of cGAS.Taken together,our findings unravel a novel antagonistic strategy by which SARS-CoV-2 reduces DNA-triggered IFN-I pathway through interfering with cGAS-DNA phase separation.展开更多
In this paper,we first establish the existence of blow-up solutions with two antipodal points of the fourth order mean field equations on S^(4).Moreover,we construct non-axially symmetric solutions with blow-up points...In this paper,we first establish the existence of blow-up solutions with two antipodal points of the fourth order mean field equations on S^(4).Moreover,we construct non-axially symmetric solutions with blow-up points at the vertices of regular configurations,i.e.,equilateral triangles on a great circle,regular tetrahedrons,cubes,octahedrons,icosahedrons and dodecahedrons.The bubbling rates of these blow-up solutions rely on various bubbling configurations.展开更多
The ongoing 2019 novel coronavirus disease(COVID-19)caused by SARS-CoV-2 has posed a worldwide pandemic and a major global public health threat.The severity and mortality of COVID-19 are associated with virus-induced ...The ongoing 2019 novel coronavirus disease(COVID-19)caused by SARS-CoV-2 has posed a worldwide pandemic and a major global public health threat.The severity and mortality of COVID-19 are associated with virus-induced dysfunctional inflammatory responses and cytokine storms.However,the interplay between host inflammatory responses and SARS-CoV-2 infection remains largely unknown.Here,we demonstrate that SARS-CoV-2 nucleocapsid(N)protein,the major structural protein of the virion,promotes the virus-triggered activation of NF-kB signaling.After binding to viral RNA,N protein robustly undergoes liquid-liquid phase separation(LLPS),which recruits TAK1 and IKK complex,the key kinases of NF-kB signaling,to enhance NF-kB activation.Moreover,1,6-hexanediol,the inhibitor of LLPS,can attenuate the phase separation of N protein and restrict its regulatory functions in NF-kB activation.These results suggest that LLPS of N protein provides a platform to Induce NF-kB hyper-activation,which could be a potential therapeutic target against COVID-19 severe pneumonia.展开更多
文摘Purpose: Descending necrotizing mediastinitis(DNM) is a lethal and acute suppurative disease. This report aimed to summarize our experience in the treatment of DNM with continuous negative pressure catheter drainage and transnasal jejunal feeding by interventional techniques. Materials and Methods: We retrospectively analyzed relevant clinical data of patients with DNM who underwent continuous negative pressure catheter drainage and transnasal jejunal feeding. All drainage catheters and jejunal feeding tubes were inserte d by interventional techniques. Results: In total, 21 patients were diagnosed with DNM by esophagography and computed tomography(CT). Catheters for the drainage of mediastinal abscesses as well as transnasal jejunal feeding tubes were successfully placed in all patients, indicating a 100% success rate. Of all patients, 13 underwent insertion of abscess drainage catheters through percutaneous puncture under DynaCT guidance, while eight had drainage catheter insertion through fistula orifices in the posterior nasopharyngeal wall or esophagus under fluoroscopic guidance. In total, 26 drainage tubes were inserted. One patient with diabetes died of sepsis and diabetic ketoacidosis 5 days postoperatively, while the remaining 20 patients showed good recovery with successful removal of the drainage catheters. Durations of catheterization were 45.2±50.44 days. The overall clinical success rate was 95.2%. Conclusion: The above described methods are non-surgical, minimally invasive and efficacious, and may be alternative therapeutic tools for patients who are not eligible for surgical operation, have a high postoperative risk, or are more likely to choose minimally invasive techniques.
基金supported by the National Key R&D Program of China (2020YFA0908700)Guangdong Provincial Key R&D Program for Covid 19 (232020012620600001)+4 种基金National Natural Science Foundation of China (82025001,31970700,32170876)Guangdong Basic and Applied Basic Research Foundation (2020B1515120090)Natural Science Foundation of Guangdong Province,China (2021A1515012179)Guangdong Clinical Research Center for Critical Care Medicine (2020B1111170005)the Sun Yat‑sen University Clinical Research Program 5010 (2019002).
文摘Currently,the incidence and fatality rate of SARS-CoV-2 remain continually high worldwide.COVID-19 patients infected with SARS-CoV-2 exhibited decreased type I interferon(IFN-I)signal,along with limited activation of antiviral immune responses as well as enhanced viral infectivity.Dramatic progresses have been made in revealing the multiple strategies employed by SARS-CoV-2 in impairing canonical RNA sensing pathways.However,it remains to be determined about the SARS-CoV-2 antagonism of cGAS-mediated activation of IFN responses during infection.In the current study,we figure out that SARS-CoV-2 infection leads to the accumulation of released mitochondria DNA(mtDNA),which in turn triggers cGAS to activate IFN-I signaling.As countermeasures,SARS-CoV-2 nucleocapsid(N)protein restricts the DNA recognition capacity of cGAS to impair cGAS-induced IFN-I signaling.Mechanically,N protein disrupts the assembly of cGAS with its co-factor G3BP1 by undergoing DNA-induced liquid-liquid phase separation(LLPS),subsequently impairs the double-strand DNA(dsDNA)detection ability of cGAS.Taken together,our findings unravel a novel antagonistic strategy by which SARS-CoV-2 reduces DNA-triggered IFN-I pathway through interfering with cGAS-DNA phase separation.
基金supported by National Science Foundation of USA (Grant No.DMS-1901914)supported by National Natural Science Foundation of China (Grant Nos.12101612 and 12171456)。
文摘In this paper,we first establish the existence of blow-up solutions with two antipodal points of the fourth order mean field equations on S^(4).Moreover,we construct non-axially symmetric solutions with blow-up points at the vertices of regular configurations,i.e.,equilateral triangles on a great circle,regular tetrahedrons,cubes,octahedrons,icosahedrons and dodecahedrons.The bubbling rates of these blow-up solutions rely on various bubbling configurations.
基金This work was supported by the National Key R&D Program of China(2020YFA0908700 and 2020YFC0842400)National Natural Science Foundation of China(31870862,82025001,31700760,31970700,and 31800751)+2 种基金Guangdong Basic and Applied Basic Research Foundation(2020B1515120090)the Fundamental Research Funds for the Central Universities(18lgpy49 and 18lgpy53)Natural Science Foundation of Guangdong Province,China(2021A1515012179).
文摘The ongoing 2019 novel coronavirus disease(COVID-19)caused by SARS-CoV-2 has posed a worldwide pandemic and a major global public health threat.The severity and mortality of COVID-19 are associated with virus-induced dysfunctional inflammatory responses and cytokine storms.However,the interplay between host inflammatory responses and SARS-CoV-2 infection remains largely unknown.Here,we demonstrate that SARS-CoV-2 nucleocapsid(N)protein,the major structural protein of the virion,promotes the virus-triggered activation of NF-kB signaling.After binding to viral RNA,N protein robustly undergoes liquid-liquid phase separation(LLPS),which recruits TAK1 and IKK complex,the key kinases of NF-kB signaling,to enhance NF-kB activation.Moreover,1,6-hexanediol,the inhibitor of LLPS,can attenuate the phase separation of N protein and restrict its regulatory functions in NF-kB activation.These results suggest that LLPS of N protein provides a platform to Induce NF-kB hyper-activation,which could be a potential therapeutic target against COVID-19 severe pneumonia.