The International Committee of Medical Journal Editors （ICMJE） believes that there is an ethical obligation to responsibly share data generated by interventional clinical trials because participants have put themsel...The International Committee of Medical Journal Editors （ICMJE） believes that there is an ethical obligation to responsibly share data generated by interventional clinical trials because participants have put themselves at risk. In a growing consensus, many funders around the world - foundations, government agencies, and industry - now mandate data sharing. Here, we outline ICMJE＇s proposed requirements to help meet this obligation. We encourage feedback on the proposed requirements. Anyone can provide feedback at www. icmje.org by April 18, 2016.展开更多
AIM： To isolate putative pancreatic stem cells （PSCs） from human adult tissues of pancreas duct using serumfree, conditioned medium. The characterization of surface phenotype of these PSCs was analyzed by flow cyto...AIM： To isolate putative pancreatic stem cells （PSCs） from human adult tissues of pancreas duct using serumfree, conditioned medium. The characterization of surface phenotype of these PSCs was analyzed by flow cytometry. The potential for pancreatic lineage and the capability of β-cell differentiation in these PSCs were evaluated as well. METHODS： By using serum-free medium supplemented with essential growth factors, we attempted to isolate the putative PSCs which has been reported to express nestin and pdx-1. The MatrigelTM was employed to evaluate the differential capacity of isolated cells. Dithizone staining, insulin content/secretion measurement, and immunohistochemistry staining were used to monitor the differentiation. Fluorescence activated cell sorting （FACS） was used to detect the phenotypic markers of putative PSCs. RESULTS： A monolayer of spindle-like cells was cultivated. The putative PSCs expressed pdx-1 and nestin. They were also able to differentiate into insulin-, glucagon-, and somatostatin-positive cells. The spectrum of phenotypic markers in PSCs was investigated; a similarity was revealed when using human bone marrow-derived stem cells as the comparative experiment, such as CD29, CD44, CD49, CD50, CD51, CD62E, PDGFR-α, CD73 （SH2）, CD81, CD105（SH3）. CONCLUSION： In this study, we successfully isolated PSCs from adult human pancreatic duct by using serumfree medium. These PSCs not only expressed nestin and pdx-1 but also exhibited markers attributable to mesenchymal stem cells. Although work is needed to elucidate the role of these cells, the application of these PSCs might be therapeutic strategies for diabetes mellitus.展开更多
国际糖尿病足工作组(IWGDF)1999年发布了关于预防和管理糖尿病足病的循证指南。该指南旨在预防糖尿病患者的足部溃疡,并在2015年,IWGDF对预防指南进行了更新。我们遵循GRADE(grading of recommendations assessment development and eva...国际糖尿病足工作组(IWGDF)1999年发布了关于预防和管理糖尿病足病的循证指南。该指南旨在预防糖尿病患者的足部溃疡,并在2015年,IWGDF对预防指南进行了更新。我们遵循GRADE(grading of recommendations assessment development and evaluation)的评分方法,采用以患者为观察对象、有干预措施、与对照组进行比较、观察结局(patient-intervention-comparison-outcome,PICO)的方法来设计临床问题和关键成果,对医学科学文献进行系统评价,并撰写推荐意见及其理由。这些推荐基于系统评价中发现的证据质量、专家意见,以及益处及危害的权重、患者偏好、可行性和适用性以及与干预相关成本的权衡。我们建议对处于极低溃疡风险的患者每年做一次筛查,了解其是否有周围神经病变和外周血管病变,对高风险人群检查的频率要更高,以筛查其他危险因素。为了预防足溃疡,要对有危险因素的患者进行健康教育,教育患者适当地对足部进行自我护理以及对溃疡前症状进行有效治疗。指导中高危患者穿着合适的治疗鞋,并对其足部皮肤温度进行监测。处方治疗鞋在行走过程中具有明显的减轻足底压力的效果,能够防止足底溃疡复发。急性足溃疡或即将发生的足溃疡保守治疗失败,应考虑手术干预。我们不建议使用神经松解减压术。对高危患者给予综合足部医疗护理,以防溃疡复发。贯彻这些推荐将有助于医疗专业人员对有足溃疡风险的糖尿病患者提供更好的护理,降低糖尿病足溃疡的发生率,使足部健康维持更长的时间即增加无足病的天数,显著减少糖尿病患者和医疗机构的负担。展开更多
A varicocele is defined as the abnormal dilation of the internal testicular vein and pampiniform venus plexus within the spermatic cord. If a semen analysis is not obtained from the adolescent male, in the absence of ...A varicocele is defined as the abnormal dilation of the internal testicular vein and pampiniform venus plexus within the spermatic cord. If a semen analysis is not obtained from the adolescent male, in the absence of other symptoms, the main clinical indication used by many urologists to recommend repair is testicular atrophy. The varicocele may result in testicular damage in some males causing testicular atrophy with impaired sperm production and decreased Leydig cell function, while in other males the varicocele may seemingly cause no ill effects. In adult men, varicoceles are frequently present and surgically correctable, yet the measurable benefits of surgical repair are slight according to a Cochrane review. While occurring more commonly in infertile men than fertile men, only 20% of men with a documented varicocele will suffer from fertility problems. Most varicoceles found in adolescents are detected during a routine medical examination, and it is difficult to predict which adolescent presenting with a varicocele will ultimately show diminished testicular function in adolescence or adulthood. As in adults, the mainstay of treatment for varicocele in adolescents is surgical correction. However, unlike an adult varicocelectomy （the microsurgical approach is the most common）, treatment for an adolescent varicocele is more often laparoscopic. Nevertheless, the goals of treatment are the same in the adolescent and adult patients. Controversy remains as to which patients to treat, when to initiate the treatment, and what type of treatment is the best. This review will present the current understanding of the etiology, diagnosis and treatment of the adolescent varicocele.展开更多
We examine the intersection of the FAIR principles(Findable,Accessible,Interoperable and Reusable),the challenges and opportunities presented by the aggregation of widely distributed and heterogeneous data about biolo...We examine the intersection of the FAIR principles(Findable,Accessible,Interoperable and Reusable),the challenges and opportunities presented by the aggregation of widely distributed and heterogeneous data about biological and geological specimens,and the use of the Digital Object Architecture(DOA)data model and components as an approach to solving those challenges that offers adherence to the FAIR principles as an integral characteristic.This approach will be prototyped in the Distributed System of Scientific Collections(DiSSCo)project,the pan-European Research Infrastructure which aims to unify over 110 natural science collections across 21 countries.We take each of the FAIR principles,discuss them as requirements in the creation of a seamless virtual collection of bio/geo specimen data,and map those requirements to Digital Object components and facilities such as persistent identification,extended data typing,and the use of an additional level of abstraction to normalize existing heterogeneous data structures.The FAIR principles inform and motivate the work and the DO Architecture provides the technical vision to create the seamless virtual collection vitally needed to address scientific questions of societal importance.展开更多
文摘The International Committee of Medical Journal Editors （ICMJE） believes that there is an ethical obligation to responsibly share data generated by interventional clinical trials because participants have put themselves at risk. In a growing consensus, many funders around the world - foundations, government agencies, and industry - now mandate data sharing. Here, we outline ICMJE＇s proposed requirements to help meet this obligation. We encourage feedback on the proposed requirements. Anyone can provide feedback at www. icmje.org by April 18, 2016.
基金Supported by National Science Council, Yen-Tj ing-Ling Medical Foundation and Taipei Veterans General Hospital
文摘AIM： To isolate putative pancreatic stem cells （PSCs） from human adult tissues of pancreas duct using serumfree, conditioned medium. The characterization of surface phenotype of these PSCs was analyzed by flow cytometry. The potential for pancreatic lineage and the capability of β-cell differentiation in these PSCs were evaluated as well. METHODS： By using serum-free medium supplemented with essential growth factors, we attempted to isolate the putative PSCs which has been reported to express nestin and pdx-1. The MatrigelTM was employed to evaluate the differential capacity of isolated cells. Dithizone staining, insulin content/secretion measurement, and immunohistochemistry staining were used to monitor the differentiation. Fluorescence activated cell sorting （FACS） was used to detect the phenotypic markers of putative PSCs. RESULTS： A monolayer of spindle-like cells was cultivated. The putative PSCs expressed pdx-1 and nestin. They were also able to differentiate into insulin-, glucagon-, and somatostatin-positive cells. The spectrum of phenotypic markers in PSCs was investigated; a similarity was revealed when using human bone marrow-derived stem cells as the comparative experiment, such as CD29, CD44, CD49, CD50, CD51, CD62E, PDGFR-α, CD73 （SH2）, CD81, CD105（SH3）. CONCLUSION： In this study, we successfully isolated PSCs from adult human pancreatic duct by using serumfree medium. These PSCs not only expressed nestin and pdx-1 but also exhibited markers attributable to mesenchymal stem cells. Although work is needed to elucidate the role of these cells, the application of these PSCs might be therapeutic strategies for diabetes mellitus.
文摘国际糖尿病足工作组(IWGDF)1999年发布了关于预防和管理糖尿病足病的循证指南。该指南旨在预防糖尿病患者的足部溃疡,并在2015年,IWGDF对预防指南进行了更新。我们遵循GRADE(grading of recommendations assessment development and evaluation)的评分方法,采用以患者为观察对象、有干预措施、与对照组进行比较、观察结局(patient-intervention-comparison-outcome,PICO)的方法来设计临床问题和关键成果,对医学科学文献进行系统评价,并撰写推荐意见及其理由。这些推荐基于系统评价中发现的证据质量、专家意见,以及益处及危害的权重、患者偏好、可行性和适用性以及与干预相关成本的权衡。我们建议对处于极低溃疡风险的患者每年做一次筛查,了解其是否有周围神经病变和外周血管病变,对高风险人群检查的频率要更高,以筛查其他危险因素。为了预防足溃疡,要对有危险因素的患者进行健康教育,教育患者适当地对足部进行自我护理以及对溃疡前症状进行有效治疗。指导中高危患者穿着合适的治疗鞋,并对其足部皮肤温度进行监测。处方治疗鞋在行走过程中具有明显的减轻足底压力的效果,能够防止足底溃疡复发。急性足溃疡或即将发生的足溃疡保守治疗失败,应考虑手术干预。我们不建议使用神经松解减压术。对高危患者给予综合足部医疗护理,以防溃疡复发。贯彻这些推荐将有助于医疗专业人员对有足溃疡风险的糖尿病患者提供更好的护理,降低糖尿病足溃疡的发生率,使足部健康维持更长的时间即增加无足病的天数,显著减少糖尿病患者和医疗机构的负担。
文摘A varicocele is defined as the abnormal dilation of the internal testicular vein and pampiniform venus plexus within the spermatic cord. If a semen analysis is not obtained from the adolescent male, in the absence of other symptoms, the main clinical indication used by many urologists to recommend repair is testicular atrophy. The varicocele may result in testicular damage in some males causing testicular atrophy with impaired sperm production and decreased Leydig cell function, while in other males the varicocele may seemingly cause no ill effects. In adult men, varicoceles are frequently present and surgically correctable, yet the measurable benefits of surgical repair are slight according to a Cochrane review. While occurring more commonly in infertile men than fertile men, only 20% of men with a documented varicocele will suffer from fertility problems. Most varicoceles found in adolescents are detected during a routine medical examination, and it is difficult to predict which adolescent presenting with a varicocele will ultimately show diminished testicular function in adolescence or adulthood. As in adults, the mainstay of treatment for varicocele in adolescents is surgical correction. However, unlike an adult varicocelectomy （the microsurgical approach is the most common）, treatment for an adolescent varicocele is more often laparoscopic. Nevertheless, the goals of treatment are the same in the adolescent and adult patients. Controversy remains as to which patients to treat, when to initiate the treatment, and what type of treatment is the best. This review will present the current understanding of the etiology, diagnosis and treatment of the adolescent varicocele.
文摘We examine the intersection of the FAIR principles(Findable,Accessible,Interoperable and Reusable),the challenges and opportunities presented by the aggregation of widely distributed and heterogeneous data about biological and geological specimens,and the use of the Digital Object Architecture(DOA)data model and components as an approach to solving those challenges that offers adherence to the FAIR principles as an integral characteristic.This approach will be prototyped in the Distributed System of Scientific Collections(DiSSCo)project,the pan-European Research Infrastructure which aims to unify over 110 natural science collections across 21 countries.We take each of the FAIR principles,discuss them as requirements in the creation of a seamless virtual collection of bio/geo specimen data,and map those requirements to Digital Object components and facilities such as persistent identification,extended data typing,and the use of an additional level of abstraction to normalize existing heterogeneous data structures.The FAIR principles inform and motivate the work and the DO Architecture provides the technical vision to create the seamless virtual collection vitally needed to address scientific questions of societal importance.
