Alveolar ridge atrophy brings great challenges for endosteal implantation due to the lack of adequate vertical bone mass to hold the implants.To overcome this limitation,we developed a novel dental implant design:sub-...Alveolar ridge atrophy brings great challenges for endosteal implantation due to the lack of adequate vertical bone mass to hold the implants.To overcome this limitation,we developed a novel dental implant design:sub-scaffold dental implant system(SDIS),which is composed of a metal implant and a micro-nano bioactive glass scaffold.This implant system can be directly implanted under mucous membranes without adding any biomolecules or destroying the alveolar ridge.To evaluate the performance of the novel implant system in vivo,SDISs were implanted into the subepicranial aponeurosis space of Sprague–Dawley rats.After 6 weeks,the SDIS and surrounding tissues were collected and analysed by micro-CT,scanning electron microscopy and histology.Our results showed that SDISs implanted into the sub-epicranial aponeurosis had integrated with the skull without any mobility and could stably support a denture.Moreover,this design achieved alveolar ridge augmentation,as active osteogenesis could be observed outside the cortical bone.Considering that the microenvironment of the sub-epicranial aponeurosis space is similar to that of the alveolar ridge,SDISs have great potential for clinical applications in the treatment of atrophic alveolar ridges.The study was approved by the Animal Care Committee of Guangdong Pharmaceutical University(approval No.2017370).展开更多
目的观察吸入不同浓度七氟醚联合丙泊酚麻醉对罗库溴铵药效学的影响。方法选择2014年11月—2015年2月在我院行择期腹部手术患者67例,按随机数字表法分为3组:丙泊酚联合呼气末0.5最低肺泡有效浓度(MAC)七氟醚组(Ⅰ组,24例);丙泊酚联合0.7...目的观察吸入不同浓度七氟醚联合丙泊酚麻醉对罗库溴铵药效学的影响。方法选择2014年11月—2015年2月在我院行择期腹部手术患者67例,按随机数字表法分为3组:丙泊酚联合呼气末0.5最低肺泡有效浓度(MAC)七氟醚组(Ⅰ组,24例);丙泊酚联合0.75 MAC七氟醚组(Ⅱ组,20例);丙泊酚联合1 MAC七氟醚组(Ⅲ组,23例)。3组患者采用咪达唑仑0.05 mg/kg、舒芬太尼0.3μg/kg、依托咪酯0.3 mg/kg诱导麻醉,闭环肌松输注系统(CLMRIS)输注2倍95%有效剂量(ED95)的罗库溴铵(0.6 mg/kg),并采用T1模式进行肌松监测。记录罗库溴铵平均使用剂量、恢复指数以及丙泊酚和瑞芬太尼的平均使用剂量。结果Ⅰ~Ⅲ组罗库溴铵平均使用剂量依次降低[(9.71±2.38 vs 7.50±0.98 vs 6.90±1.14)μg·kg^(-1)·min^(-1),F=18.562,P<0.05],3组间恢复指数差异无统计学意义[(8.92±2.62 vs 8.95±2.58 vs 10.30±3.65)min,F=1.577,P>0.05],同时Ⅲ组丙泊酚和瑞芬太尼的平均使用剂量较Ⅰ组、Ⅱ组降低(P<0.05)。结论高浓度的七氟醚可增强罗库溴铵的肌松作用,同时可减少丙泊酚和瑞芬太尼使用量。展开更多
Summary： Alveolar epithelial type II （AT II） cells are essential for lung development and remodeling, as they are precursors for type I cells and also produce other non-repair cells （fibroblasts）. Progenitor ceil...Summary： Alveolar epithelial type II （AT II） cells are essential for lung development and remodeling, as they are precursors for type I cells and also produce other non-repair cells （fibroblasts）. Progenitor ceils are believed to possess capability of multi-potent transdifferentiation, which is closely related to the niche, suggesting the importance of establishment of a lung progenitor cell niche model. We hypothesized that pulmonary surfactant-associated protein A （SPA） suicide gene system would cause AT II cell to kill itself through apoptosis and leave its niche. In vitro, the recombinant adeno-associated virus vectors-SPA-thymidine kinase （rAAV-SPA-TK） system was established to get targeted apoptotic AT II cells. The apoptosis of AT II cells was detected by using MTT. The results showed that cloned SPA gene promoter had specific transcriptional activity in SPA high expression cells, and SPA high expression cells （H441） transfected with TK gene had higher sensitivity to ganciclovir （GCV） than SPA low expression cells （A549）. In vivo, increased apoptosis of AT II cells induced by GCV in rAAV-SPA-TK system was observed by TUNEL. Finally, the successful packaging and application of rAAV-SPA-TK system provide experimental basis to get specific lung progenitor cell （AT II） niche in vitro and in vivo.展开更多
基金This study was financially supported by the National Key Research and Development Program of China(No.2018YFC1106300)the China Postdoctoral Science Foundation(No.2020M672732)+2 种基金the Natural Science Foundation of Guangdong Province of China(No.2019A1515110480)the Medical Scientific Research Foundation of Guangdong Province of China(No.A2020107)the Beijing Municipal Health Commission of China(Nos.BMHC-2019-9,BMHC-2018-4,PXM2020_026275_000002).
文摘Alveolar ridge atrophy brings great challenges for endosteal implantation due to the lack of adequate vertical bone mass to hold the implants.To overcome this limitation,we developed a novel dental implant design:sub-scaffold dental implant system(SDIS),which is composed of a metal implant and a micro-nano bioactive glass scaffold.This implant system can be directly implanted under mucous membranes without adding any biomolecules or destroying the alveolar ridge.To evaluate the performance of the novel implant system in vivo,SDISs were implanted into the subepicranial aponeurosis space of Sprague–Dawley rats.After 6 weeks,the SDIS and surrounding tissues were collected and analysed by micro-CT,scanning electron microscopy and histology.Our results showed that SDISs implanted into the sub-epicranial aponeurosis had integrated with the skull without any mobility and could stably support a denture.Moreover,this design achieved alveolar ridge augmentation,as active osteogenesis could be observed outside the cortical bone.Considering that the microenvironment of the sub-epicranial aponeurosis space is similar to that of the alveolar ridge,SDISs have great potential for clinical applications in the treatment of atrophic alveolar ridges.The study was approved by the Animal Care Committee of Guangdong Pharmaceutical University(approval No.2017370).
文摘目的观察吸入不同浓度七氟醚联合丙泊酚麻醉对罗库溴铵药效学的影响。方法选择2014年11月—2015年2月在我院行择期腹部手术患者67例,按随机数字表法分为3组:丙泊酚联合呼气末0.5最低肺泡有效浓度(MAC)七氟醚组(Ⅰ组,24例);丙泊酚联合0.75 MAC七氟醚组(Ⅱ组,20例);丙泊酚联合1 MAC七氟醚组(Ⅲ组,23例)。3组患者采用咪达唑仑0.05 mg/kg、舒芬太尼0.3μg/kg、依托咪酯0.3 mg/kg诱导麻醉,闭环肌松输注系统(CLMRIS)输注2倍95%有效剂量(ED95)的罗库溴铵(0.6 mg/kg),并采用T1模式进行肌松监测。记录罗库溴铵平均使用剂量、恢复指数以及丙泊酚和瑞芬太尼的平均使用剂量。结果Ⅰ~Ⅲ组罗库溴铵平均使用剂量依次降低[(9.71±2.38 vs 7.50±0.98 vs 6.90±1.14)μg·kg^(-1)·min^(-1),F=18.562,P<0.05],3组间恢复指数差异无统计学意义[(8.92±2.62 vs 8.95±2.58 vs 10.30±3.65)min,F=1.577,P>0.05],同时Ⅲ组丙泊酚和瑞芬太尼的平均使用剂量较Ⅰ组、Ⅱ组降低(P<0.05)。结论高浓度的七氟醚可增强罗库溴铵的肌松作用,同时可减少丙泊酚和瑞芬太尼使用量。
基金supported by the National Natural Science Foundation of China(No.30500224)
文摘Summary： Alveolar epithelial type II （AT II） cells are essential for lung development and remodeling, as they are precursors for type I cells and also produce other non-repair cells （fibroblasts）. Progenitor ceils are believed to possess capability of multi-potent transdifferentiation, which is closely related to the niche, suggesting the importance of establishment of a lung progenitor cell niche model. We hypothesized that pulmonary surfactant-associated protein A （SPA） suicide gene system would cause AT II cell to kill itself through apoptosis and leave its niche. In vitro, the recombinant adeno-associated virus vectors-SPA-thymidine kinase （rAAV-SPA-TK） system was established to get targeted apoptotic AT II cells. The apoptosis of AT II cells was detected by using MTT. The results showed that cloned SPA gene promoter had specific transcriptional activity in SPA high expression cells, and SPA high expression cells （H441） transfected with TK gene had higher sensitivity to ganciclovir （GCV） than SPA low expression cells （A549）. In vivo, increased apoptosis of AT II cells induced by GCV in rAAV-SPA-TK system was observed by TUNEL. Finally, the successful packaging and application of rAAV-SPA-TK system provide experimental basis to get specific lung progenitor cell （AT II） niche in vitro and in vivo.
