With the large-scale deployment of satellite constellations such as Starlink and the rapid advancement of technologies including artificial intelligence (AI) and non-terrestrial networks (NTNs), the integration of hig...With the large-scale deployment of satellite constellations such as Starlink and the rapid advancement of technologies including artificial intelligence (AI) and non-terrestrial networks (NTNs), the integration of high, medium, and low Earth orbit satellite networks with terrestrial networks has become a critical direction for future communication technologies. The objective is to develop a space-terrestrial integrated 6G network that ensures ubiquitous connectivity and seamless services, facilitating intelligent interconnection and collaborative symbiosis among humans, machines, and objects. This integration has become a central focus of global technological innovation.展开更多
A novel fabrication process related to a smoothly wet chemical etching profile o f InP-based epitaxial layers in the crystal direction of [01for an InP-based monol ithic vertically integrated transmitter with an M...A novel fabrication process related to a smoothly wet chemical etching profile o f InP-based epitaxial layers in the crystal direction of [01for an InP-based monol ithic vertically integrated transmitter with an MQW laser diode and a heterojunction bipolar tran sistors driver circuit is described.A clear eye output diagram via an O/E converter is demonstrat ed und er a 1.25Gb/s non-return-zero pseudorandom code with a pattern length of 2 the integrated transmitter has a power dissipation of about 120mW with an optical output of 2dBm.展开更多
Interleukin (IL) 28B genetic polymorphism is significantly associated with the sustained virological response rate in patients with chronic hepatitis C treated with pegylated interferon-α (PEG-IFN) plus ri...Interleukin (IL) 28B genetic polymorphism is significantly associated with the sustained virological response rate in patients with chronic hepatitis C treated with pegylated interferon-α (PEG-IFN) plus ribavirin and with spontaneous hepatitis C virus clearance. However, a consensus on the relationship between IL28B genetic polymorphism and the favorable outcome of chronic hepatitis B virus infection defined by hepatitis B e antigen seroconversion, and/or hepatitis B surface antigen seroclearance in patients treated with interferon or PEG-IFN has not been reached. Several reports failed to show a positive association, while some studies demonstrated a positive association in certain subject settings. More prospective studies including large cohorts are needed to determine the possible association between IL28B genetic polymorphism and the outcome of interferon or PEG-IFN treatment for chronic hepatitis B.展开更多
AIM: To evaluate combination transjugular intrahepatic portosystemic shunt(TIPS) and other interventions for hepatocellular carcinoma(HCC) and portal hypertension.METHODS: Two hundred and sixty-one patients with HCC a...AIM: To evaluate combination transjugular intrahepatic portosystemic shunt(TIPS) and other interventions for hepatocellular carcinoma(HCC) and portal hypertension.METHODS: Two hundred and sixty-one patients with HCC and portal hypertension underwent TIPS combined with other interventional treatments(transarterial chemoembolization/transarterial embolization,radiofrequency ablation,hepatic arterio-portal fistulas embolization,and splenic artery embolization) from January 1997 to January 2010 at Beijing Shijitan Hospital. Two hundred and nine patients(121 male and 88 female,aged 25-69 years,mean 48.3 ± 12.5 years) with complete clinical data were recruited. We evaluated the safety of the procedure(procedurerelated death and serious complications),change of portal vein pressure before and after TIPS,symptom relief [e.g.,ascites,hydrothorax,esophageal gastricfundus variceal bleeding(EGVB)],cumulative rates of survival,and distributary channel restenosis. The characteristics of the patients surviving ≥ 5 and < 5 years were also analyzed.RESULTS: The portosystemic pressure was decreased from 29.0 ± 4.1 mm Hg before TIPS to 18.1 ± 2.9 mm Hg after TIPS(t = 69.32,P < 0.05). Portosystemic pressure was decreased and portal hypertension symptoms were ameliorated. During the 5 year followup,the total recurrence rate of resistant ascites or hydrothorax was 7.2%(15/209); 36.8%(77/209) for EGVB; and 39.2%(82/209) for hepatic encephalopathy. The cumulative rates of distributary channel restenosis at 1,2,3,4,and 5 years were 17.2%(36/209),29.7%(62/209),36.8%(77/209),45.5%(95/209) and 58.4%(122/209),respectively. No procedure-related deaths and serious complications(e.g.,abdominal bleeding,hepatic failure,and distant metastasis) occurred. Moreover,Child-Pugh score,portal vein tumor thrombosis,lesion diameter,hepatic arterio-portal fistulas,HCC diagnosed before or after TIPS,stent type,hepatic encephalopathy,and type of other interventional treatments were related to 5 year survival after comparing patient characteristics.CONCLUSION: TIPS combined with other interventional treatments seems to be safe and efficacious in patients with HCC and portal hypertension.展开更多
The intestinal epithelium constitutes a physical and functional barrier between the external environment and the host organism. It is formed by a continuous monolayer of intestinal epithelial cells maintained together...The intestinal epithelium constitutes a physical and functional barrier between the external environment and the host organism. It is formed by a continuous monolayer of intestinal epithelial cells maintained together by intercellular junctional complex, limiting access of pathogens, toxins and xenobiotics to host tissues. Once this barrier integrity is disrupted, inflammatory disorders and tissue injury are initiated and perpetuated. Beneath the intestinal epithelial cells lies a population of astrocyte-like cells that are known as enteric glia. The morphological characteristics and expression markers of these enteric glia cells were identical to the astrocytes of the central nervous system. In the past few years, enteric glia have been demonstrated to have a trophic and supporting relationship with intestinal epithelial cells. Enteric glia lesions and/or functional defects can be involved in the barrier dysfunction. Besides, factors secreted by enteric glia are important for the regulation of gut barrier function. Moreover, enteric glia have an important impact on epithelial cell transcriptome and induce a shift in epithelial cell phenotype towards increased cell adhesion and cell differentiation.Enteric glia can also preserve epithelial barrier against intestinal bacteria insult. In this review, we will describe the current body of evidence supporting functional roles of enteric glia on intestinal barrier.展开更多
文摘With the large-scale deployment of satellite constellations such as Starlink and the rapid advancement of technologies including artificial intelligence (AI) and non-terrestrial networks (NTNs), the integration of high, medium, and low Earth orbit satellite networks with terrestrial networks has become a critical direction for future communication technologies. The objective is to develop a space-terrestrial integrated 6G network that ensures ubiquitous connectivity and seamless services, facilitating intelligent interconnection and collaborative symbiosis among humans, machines, and objects. This integration has become a central focus of global technological innovation.
文摘A novel fabrication process related to a smoothly wet chemical etching profile o f InP-based epitaxial layers in the crystal direction of [01for an InP-based monol ithic vertically integrated transmitter with an MQW laser diode and a heterojunction bipolar tran sistors driver circuit is described.A clear eye output diagram via an O/E converter is demonstrat ed und er a 1.25Gb/s non-return-zero pseudorandom code with a pattern length of 2 the integrated transmitter has a power dissipation of about 120mW with an optical output of 2dBm.
文摘Interleukin (IL) 28B genetic polymorphism is significantly associated with the sustained virological response rate in patients with chronic hepatitis C treated with pegylated interferon-α (PEG-IFN) plus ribavirin and with spontaneous hepatitis C virus clearance. However, a consensus on the relationship between IL28B genetic polymorphism and the favorable outcome of chronic hepatitis B virus infection defined by hepatitis B e antigen seroconversion, and/or hepatitis B surface antigen seroclearance in patients treated with interferon or PEG-IFN has not been reached. Several reports failed to show a positive association, while some studies demonstrated a positive association in certain subject settings. More prospective studies including large cohorts are needed to determine the possible association between IL28B genetic polymorphism and the outcome of interferon or PEG-IFN treatment for chronic hepatitis B.
文摘AIM: To evaluate combination transjugular intrahepatic portosystemic shunt(TIPS) and other interventions for hepatocellular carcinoma(HCC) and portal hypertension.METHODS: Two hundred and sixty-one patients with HCC and portal hypertension underwent TIPS combined with other interventional treatments(transarterial chemoembolization/transarterial embolization,radiofrequency ablation,hepatic arterio-portal fistulas embolization,and splenic artery embolization) from January 1997 to January 2010 at Beijing Shijitan Hospital. Two hundred and nine patients(121 male and 88 female,aged 25-69 years,mean 48.3 ± 12.5 years) with complete clinical data were recruited. We evaluated the safety of the procedure(procedurerelated death and serious complications),change of portal vein pressure before and after TIPS,symptom relief [e.g.,ascites,hydrothorax,esophageal gastricfundus variceal bleeding(EGVB)],cumulative rates of survival,and distributary channel restenosis. The characteristics of the patients surviving ≥ 5 and < 5 years were also analyzed.RESULTS: The portosystemic pressure was decreased from 29.0 ± 4.1 mm Hg before TIPS to 18.1 ± 2.9 mm Hg after TIPS(t = 69.32,P < 0.05). Portosystemic pressure was decreased and portal hypertension symptoms were ameliorated. During the 5 year followup,the total recurrence rate of resistant ascites or hydrothorax was 7.2%(15/209); 36.8%(77/209) for EGVB; and 39.2%(82/209) for hepatic encephalopathy. The cumulative rates of distributary channel restenosis at 1,2,3,4,and 5 years were 17.2%(36/209),29.7%(62/209),36.8%(77/209),45.5%(95/209) and 58.4%(122/209),respectively. No procedure-related deaths and serious complications(e.g.,abdominal bleeding,hepatic failure,and distant metastasis) occurred. Moreover,Child-Pugh score,portal vein tumor thrombosis,lesion diameter,hepatic arterio-portal fistulas,HCC diagnosed before or after TIPS,stent type,hepatic encephalopathy,and type of other interventional treatments were related to 5 year survival after comparing patient characteristics.CONCLUSION: TIPS combined with other interventional treatments seems to be safe and efficacious in patients with HCC and portal hypertension.
基金Supported by the National Natural Science Foundation of China,NSFC,No.81200270the Scientific Research Foundation for Outstanding Young Scientist of Shandong Province,No.BS2012SW012
文摘The intestinal epithelium constitutes a physical and functional barrier between the external environment and the host organism. It is formed by a continuous monolayer of intestinal epithelial cells maintained together by intercellular junctional complex, limiting access of pathogens, toxins and xenobiotics to host tissues. Once this barrier integrity is disrupted, inflammatory disorders and tissue injury are initiated and perpetuated. Beneath the intestinal epithelial cells lies a population of astrocyte-like cells that are known as enteric glia. The morphological characteristics and expression markers of these enteric glia cells were identical to the astrocytes of the central nervous system. In the past few years, enteric glia have been demonstrated to have a trophic and supporting relationship with intestinal epithelial cells. Enteric glia lesions and/or functional defects can be involved in the barrier dysfunction. Besides, factors secreted by enteric glia are important for the regulation of gut barrier function. Moreover, enteric glia have an important impact on epithelial cell transcriptome and induce a shift in epithelial cell phenotype towards increased cell adhesion and cell differentiation.Enteric glia can also preserve epithelial barrier against intestinal bacteria insult. In this review, we will describe the current body of evidence supporting functional roles of enteric glia on intestinal barrier.
