Gene therapy constitutes a promising strategy for the treatment of osteoarthritis (OA). We assessed the use of electroporation (EP) of non-viral gene vectors, and compared its efficacy with that of adeno-associated vi...Gene therapy constitutes a promising strategy for the treatment of osteoarthritis (OA). We assessed the use of electroporation (EP) of non-viral gene vectors, and compared its efficacy with that of adeno-associated virus (AAV) vectors. EP- and AAV-mediated delivery of human interleukin-1 receptor antagonist (hIL-1Ra) was localized performed in the joints of rats following induction of OA. mRNA levels for hIL-1Ra, IL-1β, TNF-α, MMP-13 and ADAMTS-4 in the cartilage and synovial tissues were analyzed. Structural analyses of the subchondral bone at the medial femoral condyle were performed by Micro-CT after treatment. Knee joint specimens were staining with hematoxylin and eosin and Saffron O. Induction of hIL-1Ra by both EP and AAV inhibited inflammatory-induced sub-chondral bone reconstruction, and effectively suppressed IL-1β activity, as evidenced by decreased expression of MMP-13 and ADAMTS-4. Histological analyses revealed significant protection of cartilage, proteoglycan by EP and AAV. hIL-1Ra expression was similar in both the EP and AAV groups. Notably, this gene is not easier degraded transduced by EP compared with AAV. Taken together, these results show that EP offers transfection efficiency comparable to that of AAV, with the potential for longer gene expression, making EP a promising candidate for efficient non-viral delivery of OA gene therapy.展开更多
目的:通过对IL-1受体拮抗剂(IL-1ra)基因多态性的分析,探讨IgA肾病(IgAN)的异质性以及新月体型IgAN与系统性小血管炎之间的联系。方法:随机选取200例IgAN患者、90例过敏紫癜性肾炎(HSPN)患者、45例微型多血管炎(MPA)患者及100例健康志...目的:通过对IL-1受体拮抗剂(IL-1ra)基因多态性的分析,探讨IgA肾病(IgAN)的异质性以及新月体型IgAN与系统性小血管炎之间的联系。方法:随机选取200例IgAN患者、90例过敏紫癜性肾炎(HSPN)患者、45例微型多血管炎(MPA)患者及100例健康志愿者。依据解放军肾脏病研究所拟定的分型标准,将IgAN分为六型。PCR法检测样本IL-1ra基因型。分析IL-1ra基因多态性与IgAN患者临床病理特征的联系及其在不同类型IgAN患者中的分布。分析IgAN总体、新月体型(Cres.)IgAN、HSPN、MPA不同组别间IL-1ra基因多态性的异同。结果:(1)IgAN、MPA患者IL1RN*2等位基因频率和携带率与正常对照组无统计学差异,HSPN患者IL1RN*2频率和携带率显著高于正常对照组(21.1% vs 12.0%,P<0.05;40.0% vs 24.0%,P<0.05)。(2)携带IL1RN*2的IgAN患者反复肉眼血尿发生率、肉眼血尿发作间期尿红细胞≥50万/ml发生率、新月体比例、细胞型/纤维细胞型新月体比例和毛细血管袢坏死发生率显著高于IL1RN*2不携带组(P<0.05)。(3)Cres.IgAN的IL1RN*2携带率(56.3%),显著高于其它类型IgAN及正常人群。(4)HSPN患者IL1RN*2携带组新月体比例、细胞型/纤维细胞型新月体比例以及毛细血管袢坏死发生率显著高于不携带组(P<0.05)。新月体比例≥15%组IL1RN*2携带率显著高于新月体比例<15%组。(6)新月体型IgAN患者IL1RN*2携带率,无论与HSPN总体还是与新月体比例≥15% HSPN患者相比,均无统计学差异;并且与后者数值非常接近(56.3% vs 57.7%)。结论:IL1RN*2等位基因与Cres.IgAN和HSPN的发生均有关。IL1RN*2高携带率可能是Cres.IgAN和HSPN共同的遗传背景之一。展开更多
AIM： To study the association between Interleukin-1 （IL-1） and tumor necrosis factor （TNF）-α polymorphisms, infection by Helicobacter pylori （H pylori） and the development of gastrointestinal diseases.METHODS...AIM： To study the association between Interleukin-1 （IL-1） and tumor necrosis factor （TNF）-α polymorphisms, infection by Helicobacter pylori （H pylori） and the development of gastrointestinal diseases.METHODS： Genomic DNA was extracted from the peripheral blood of 177 patients with various gastrointestinal diseases and from 100 healthy volunteers. The polymorphisms in IL-1β and TNF-α genes were analyzed using the polymerase chain reactionrestriction fragment length polymorphism method （PCRRFLP） and those from IL-1RN with PCR. The presence of infection due to H pylori and the presence of the CagA toxin were detected by serology. The histopathological parameters in the gastric biopsies of the patients were according to the Sydney classification.RESULTS： A comparison of the frequencies of the different polymorphisms studied among the patients and the control group demonstrated that the allele IL- 1RN＊2 was more frequent among patients with gastric ulcers and adenocarcinoma. Carriers of the allele IL- RN＊2 and those with reactive serology for anti-CagA IgG had a greater risk of developing peptic ulcer and gastric adenocarcinoma, as well as a higher degree of inflammation and neutrophilic activity in the gastricCONCLUSION： Our results indicate a positive association between IL-1RN gene polymorphism and infection by positive H pylori CagA strains and the development of gastric ulcers and adenocarcinoma.展开更多
文摘Gene therapy constitutes a promising strategy for the treatment of osteoarthritis (OA). We assessed the use of electroporation (EP) of non-viral gene vectors, and compared its efficacy with that of adeno-associated virus (AAV) vectors. EP- and AAV-mediated delivery of human interleukin-1 receptor antagonist (hIL-1Ra) was localized performed in the joints of rats following induction of OA. mRNA levels for hIL-1Ra, IL-1β, TNF-α, MMP-13 and ADAMTS-4 in the cartilage and synovial tissues were analyzed. Structural analyses of the subchondral bone at the medial femoral condyle were performed by Micro-CT after treatment. Knee joint specimens were staining with hematoxylin and eosin and Saffron O. Induction of hIL-1Ra by both EP and AAV inhibited inflammatory-induced sub-chondral bone reconstruction, and effectively suppressed IL-1β activity, as evidenced by decreased expression of MMP-13 and ADAMTS-4. Histological analyses revealed significant protection of cartilage, proteoglycan by EP and AAV. hIL-1Ra expression was similar in both the EP and AAV groups. Notably, this gene is not easier degraded transduced by EP compared with AAV. Taken together, these results show that EP offers transfection efficiency comparable to that of AAV, with the potential for longer gene expression, making EP a promising candidate for efficient non-viral delivery of OA gene therapy.
文摘目的:通过对IL-1受体拮抗剂(IL-1ra)基因多态性的分析,探讨IgA肾病(IgAN)的异质性以及新月体型IgAN与系统性小血管炎之间的联系。方法:随机选取200例IgAN患者、90例过敏紫癜性肾炎(HSPN)患者、45例微型多血管炎(MPA)患者及100例健康志愿者。依据解放军肾脏病研究所拟定的分型标准,将IgAN分为六型。PCR法检测样本IL-1ra基因型。分析IL-1ra基因多态性与IgAN患者临床病理特征的联系及其在不同类型IgAN患者中的分布。分析IgAN总体、新月体型(Cres.)IgAN、HSPN、MPA不同组别间IL-1ra基因多态性的异同。结果:(1)IgAN、MPA患者IL1RN*2等位基因频率和携带率与正常对照组无统计学差异,HSPN患者IL1RN*2频率和携带率显著高于正常对照组(21.1% vs 12.0%,P<0.05;40.0% vs 24.0%,P<0.05)。(2)携带IL1RN*2的IgAN患者反复肉眼血尿发生率、肉眼血尿发作间期尿红细胞≥50万/ml发生率、新月体比例、细胞型/纤维细胞型新月体比例和毛细血管袢坏死发生率显著高于IL1RN*2不携带组(P<0.05)。(3)Cres.IgAN的IL1RN*2携带率(56.3%),显著高于其它类型IgAN及正常人群。(4)HSPN患者IL1RN*2携带组新月体比例、细胞型/纤维细胞型新月体比例以及毛细血管袢坏死发生率显著高于不携带组(P<0.05)。新月体比例≥15%组IL1RN*2携带率显著高于新月体比例<15%组。(6)新月体型IgAN患者IL1RN*2携带率,无论与HSPN总体还是与新月体比例≥15% HSPN患者相比,均无统计学差异;并且与后者数值非常接近(56.3% vs 57.7%)。结论:IL1RN*2等位基因与Cres.IgAN和HSPN的发生均有关。IL1RN*2高携带率可能是Cres.IgAN和HSPN共同的遗传背景之一。
基金Supported by Secretaria Executiva de Ciência,Tecnologiae Meio Ambiente-SECTAM and Coordenao de Aperfeioamento de Pessoal de Nível Superior-CAPES
文摘AIM： To study the association between Interleukin-1 （IL-1） and tumor necrosis factor （TNF）-α polymorphisms, infection by Helicobacter pylori （H pylori） and the development of gastrointestinal diseases.METHODS： Genomic DNA was extracted from the peripheral blood of 177 patients with various gastrointestinal diseases and from 100 healthy volunteers. The polymorphisms in IL-1β and TNF-α genes were analyzed using the polymerase chain reactionrestriction fragment length polymorphism method （PCRRFLP） and those from IL-1RN with PCR. The presence of infection due to H pylori and the presence of the CagA toxin were detected by serology. The histopathological parameters in the gastric biopsies of the patients were according to the Sydney classification.RESULTS： A comparison of the frequencies of the different polymorphisms studied among the patients and the control group demonstrated that the allele IL- 1RN＊2 was more frequent among patients with gastric ulcers and adenocarcinoma. Carriers of the allele IL- RN＊2 and those with reactive serology for anti-CagA IgG had a greater risk of developing peptic ulcer and gastric adenocarcinoma, as well as a higher degree of inflammation and neutrophilic activity in the gastricCONCLUSION： Our results indicate a positive association between IL-1RN gene polymorphism and infection by positive H pylori CagA strains and the development of gastric ulcers and adenocarcinoma.
