Gene Therapy最新文献

{"title":"The AAV2.7m8 capsid packages a higher degree of heterogeneous vector genomes than AAV2","authors":"Mengtian Cui, Qin Su, Mitchell Yip, Jackson McGowan, Claudio Punzo, Guangping Gao, Phillip W. L. Tai","doi":"10.1038/s41434-024-00477-7","DOIUrl":"10.1038/s41434-024-00477-7","url":null,"abstract":"Recombinant adeno-associated virus (rAAV) vectors are currently the only proven vehicles for treating ophthalmological diseases through gene therapy. A wide range of gene therapy programs that target ocular diseases are currently being pursued. Nearly 20 years of research have gone into enhancing the efficacy of targeting retinal tissues and improving transgene delivery to specific cell types. The engineered AAV capsid, AAV2.7m8 is currently among the best capsids for transducing the retina following intravitreal (IVT) injection. However, adverse effects, including intraocular inflammation, have been reported following retinal administration of AAV2.7m8 vectors in clinical trials. Furthermore, we have consistently observed that AAV2.7m8 exhibits low packaging titers irrespective of the vector construct design. In this report, we found that AAV2.7m8 packages vector genomes with a higher degree of heterogeneity than AAV2. We also found that genome-loaded AAV2.7m8 stimulated the infiltration of microglia in mouse retinas following IVT administration, while the response to genome-loaded AAV2 and empty AAV2.7m8 capsids produced much milder responses. This finding suggests that IVT administration of AAV2.7m8 vectors may stimulate retinal immune responses in part because of its penchant to package and deliver non-unit length genomes.","PeriodicalId":12699,"journal":{"name":"Gene Therapy","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41434-024-00477-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141970988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correction: Andrew C. G. Porter (1955–2023)","authors":"Rafael J. Yáñez-Muñoz, Jane E. Itzhaki","doi":"10.1038/s41434-024-00474-w","DOIUrl":"10.1038/s41434-024-00474-w","url":null,"abstract":"","PeriodicalId":12699,"journal":{"name":"Gene Therapy","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41434-024-00474-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141901451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correction: Limited potential of AAV-mediated gene therapy in transducing human mesenchymal stem cells for bone repair applications","authors":"Sofia Bougioukli, Morgan Chateau, Heidy Morales, Venus Vakhshori, Osamu Sugiyama, Daniel Oakes, Donald Longjohn, Paula Cannon, Jay R. Lieberman","doi":"10.1038/s41434-024-00472-y","DOIUrl":"10.1038/s41434-024-00472-y","url":null,"abstract":"","PeriodicalId":12699,"journal":{"name":"Gene Therapy","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41434-024-00472-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141874629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Andrew C. G. Porter (1955–2023)","authors":"Rafael J. Yáñez-Muñoz, Jane E. Itzhaki","doi":"10.1038/s41434-024-00470-0","DOIUrl":"10.1038/s41434-024-00470-0","url":null,"abstract":"","PeriodicalId":12699,"journal":{"name":"Gene Therapy","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41434-024-00470-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141792303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preclinical evaluation of tissue-selective gene therapies for congenital generalised lipodystrophy","authors":"Mansi Tiwari, Ahlima Roumane, Nadine Sommer, Weiping Han, Mirela Delibegović, Justin J. Rochford, George D. Mcilroy","doi":"10.1038/s41434-024-00471-z","DOIUrl":"10.1038/s41434-024-00471-z","url":null,"abstract":"Lipodystrophy is a rare disorder which can be life-threatening. Here individuals fail to develop or maintain appropriate adipose tissue stores. This typically causes severe metabolic complications, including hepatic steatosis and lipoatrophic diabetes. There is no cure for lipodystrophy, and treatment options remain very limited. Here we evaluate whether tissue-selective adeno-associated virus (AAV) vectors can provide a targeted form of gene therapy for lipodystrophy, using a preclinical lipodystrophic mouse model of Bscl2 deficiency. We designed AAV vectors containing the mini/aP2 or thyroxine-binding globulin promoter to selectively target adipose or liver respectively. The AAV-aP2 vectors also contained the liver-specific microRNA-122 target sequence, restricting hepatic transgene expression. Systemic delivery of AAV-aP2 vectors overexpressing human BSCL2 restored adipose tissue development and metabolic health in lipodystrophic mice without detectable expression in the liver. High doses (1 × 1012 GCs) of liver-selective vectors led to off target expression and adipose tissue development, whilst low doses (1 × 1010 GCs) expressed selectively and robustly in the liver but did not improve metabolic health. This reveals that adipose tissue-selective, but not liver directed, AAV-mediated gene therapy is sufficient to substantially recover metabolic health in generalised lipodystrophy. This provides an exciting potential new avenue for an effective, targeted, and thereby safer therapeutic intervention.","PeriodicalId":12699,"journal":{"name":"Gene Therapy","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41434-024-00471-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141785508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Amelioration of airway and GI disease in G551D-CF ferrets by AAV1 and AAV6","authors":"Cristian Ciobanu, Murali Yanda, Adi Zeidan, Jessica Izzi, William B. Guggino, Liudmila Cebotaru","doi":"10.1038/s41434-024-00469-7","DOIUrl":"10.1038/s41434-024-00469-7","url":null,"abstract":"Gene therapy for CF has concentrated on targeting the lung. Here we took a different approach by injecting into the cephalic vein and spraying into the trachea of G551D, CF ferrets either AAV1 or 6 containing Δ27-264-CFTR, a truncated version of CFTR. Treatment with the potentiator VX-770 was halted for 7 days before instillation to induce a disease phenotype. Indeed, all ferrets were pancreas-insufficient when they entered the study. Four ferrets (three receiving AAV1 and one AAV6) were necropsied 48 days after vector delivery, and four (three receiving AAV6, one AAV1) were euthanized or died prior to the planned necropsy. AAV1 or AAV6 vector genomes, mRNA expression, and CFTR protein were detected in all tracheal and lung samples and in the liver, pancreas, and ileum of the treated ferrets. Surface and basal airway cells, pancreatic and bile ducts, and ileal crypts and villi were successfully transduced. Obstruction of the airways accompanied by pulmonary hemorrhaging, plugged pancreatic and bile ducts as well as mucous plugs in the ileum were noticed in untreated but absent from transduced ferrets necropsied at 48 days. Transduction of G551D ferrets suggests that a combination of systemic and airway application may be the preferred route of delivery for CF.","PeriodicalId":12699,"journal":{"name":"Gene Therapy","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41434-024-00469-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141777539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Gene drives: an alternative approach to malaria control?","authors":"Kubendran Naidoo, Shüné V Oliver","doi":"10.1038/s41434-024-00468-8","DOIUrl":"https://doi.org/10.1038/s41434-024-00468-8","url":null,"abstract":"<p><p>Genetic modification for the control of mosquitoes is frequently touted as a solution for a variety of vector-borne diseases. There has been some success using non-insecticidal methods like sterile or incompatible insect techniques to control arbovirus diseases. However, control by genetic modifications to reduce mosquito populations or create mosquitoes that are refractory to infection with pathogens are less developed. The advent of CRISPR-Cas9-mediated gene drives may advance this mechanism of control. In this review, use and progress of gene drives for vector control, particularly for malaria, is discussed. A brief history of population suppression and replacement gene drives in mosquitoes, rapid advancement of the field over the last decade and how genetic modification fits into the current scope of vector control are described. Mechanisms of alternative vector control by genetic modification to modulate mosquitoes' immune responses and anti-parasite effector molecules as part of a combinational strategy to combat malaria are considered. Finally, the limitations and ethics of using gene drives for mosquito control are discussed.</p>","PeriodicalId":12699,"journal":{"name":"Gene Therapy","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141747935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization of brain transduction capability of a BBB-penetrant AAV vector in mice, rats and macaques reveals differences in expression profiles","authors":"María Bunuales,&nbsp;Angeles Garduno,&nbsp;Miguel Chillon,&nbsp;Assumpció Bosch,&nbsp;Manuela Gonzalez-Aparicio,&nbsp;Maria Espelosin,&nbsp;Marta Garcia-Gomara,&nbsp;Alberto J. Rico,&nbsp;Ana Garcia-Osta,&nbsp;Mar Cuadrado-Tejedor,&nbsp;Jose L. Lanciego,&nbsp;Ruben Hernandez-Alcoceba","doi":"10.1038/s41434-024-00466-w","DOIUrl":"10.1038/s41434-024-00466-w","url":null,"abstract":"Different screening methods are being developed to generate adeno-associated viral vectors (AAV) with the ability to bypass the blood-brain barrier (BBB) upon intravenous administration. Recently, the AAV9P31 stood out as the most efficient version among a library of peptide-displaying capsids selected in C57BL/6 mice using RNA-driven biopanning. In this work we have characterized in detail its biodistribution in different mouse strains (C57BL/6 and Balb/c), as well as in Sprague Dawley rats and non-human primates (Macaca fascicularis). Using GFP and NanoLuc reporter genes, we confirmed homogeneous infection and transgene expression across the CNS of mice injected intravenously with AAV9P31. A more restricted pattern was observed upon either intracerebroventricular or intraparenchymal injection. Following intravenous delivery, region- and cell-specific differential patterns of transduction were observed in the mouse brain, including a preferential transduction of astrocytes and neurons in the cerebral cortex and striatum, whereas neurons were the only transduced cell type in subcortical locations across the hippocampus, thalamus, hypothalamus, mesencephalon, brainstem and cerebellum. Furthermore, transduced microglial cells were never found in any CNS location. Peripheral organs transduced upon intravenous administration included lung, liver, peritoneum, heart and skeletal muscle. However, a comparable performance of AAV9P31 to bypass the BBB in rats and macaques was not observed, although a more limited neuronal transduction was found in the brainstem of rats upon intravenous delivery. Finally, intracerebroventricular delivery in macaques resulted in neuronal transduction in cortical, subcortical structures and cerebellum following a patchy pattern. In conclusion, the widespread CNS transduction obtained in mice upon intravenous delivery of AAV9P31 represents a powerful tool for modeling a wide variety of neurological disorders as well as an appealing choice for the evaluation of gene therapy-based therapeutics.","PeriodicalId":12699,"journal":{"name":"Gene Therapy","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41434-024-00466-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141747934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Suppression of viral rebound by a Rev-dependent lentiviral particle in SIV-infected rhesus macaques.","authors":"Brian Hetrick, Summer Siddiqui, Mark Spear, Jia Guo, Huizhi Liang, Yajing Fu, Zhijun Yang, Lara Doyle-Meyers, Bapi Pahar, Ronald S Veazey, Jason Dufour, Ali Andalibi, Binhua Ling, Yuntao Wu","doi":"10.1038/s41434-024-00467-9","DOIUrl":"https://doi.org/10.1038/s41434-024-00467-9","url":null,"abstract":"<p><p>Persistence of human immunodeficiency virus (HIV) reservoirs prevents viral eradication, and consequently HIV-infected patients require lifetime treatment with antiretroviral therapy (ART) [1-5]. Currently, there are no effective therapeutics to prevent HIV rebound upon ART cessation. Here we describe an HIV/SIV Rev-dependent lentiviral particle that can be administered to inhibit viral rebound [6-9]. Using simian immunodeficiency virus (SIV)-infected rhesus macaques as a model, we demonstrate that the administration of pre-assembled SIV Rev-dependent lentiviral particles into SIVmac239-infected Indian rhesus macaques can lead to reduction of viral rebound upon ART termination. One of the injected animals, KC50, controlled plasma and CNS viremia to an undetectable level most of the time for over two years after ART termination. Surprisingly, detailed molecular and immunological characterization revealed that viremia control was concomitant with the induction of neutralizing antibodies (nAbs) following the administration of the Rev-dependent vectors. This study emphasizes the importance of neutralizing antibodies (nAbs) for viremia control [10-15], and also provides proof of concept that the Rev-dependent vector can be used to target viral reservoirs, including the CNS reservoirs, in vivo. However, future large-scale in vivo studies are needed to understand the potential mechanisms of viremia control induced by the Rev-dependent vector.</p>","PeriodicalId":12699,"journal":{"name":"Gene Therapy","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141723411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The impact of heparin and direct thrombin inhibitors on cell-penetrating polymer siRNA transfection","authors":"Lucas Mota,&nbsp;Max Zhu,&nbsp;John N. Tomeo,&nbsp;Melina Recarey,&nbsp;Nyah Patel,&nbsp;Leena Pradhan-Nabzdyk,&nbsp;Frank W. LoGerfo,&nbsp;Patric Liang","doi":"10.1038/s41434-024-00460-2","DOIUrl":"10.1038/s41434-024-00460-2","url":null,"abstract":"Gene therapy using siRNA has become a promising strategy to achieve targeted gene knockdown for treatment of cardiovascular pathologies. However, efficient siRNA transfection often relies on cationic delivery vectors such as synthetic cell-penetrating polymers which are susceptible to interference by negatively charged molecules. Anticoagulants such as heparin, which is negatively charged and widely used in cardiovascular applications, may pose a significant barrier to effective siRNA delivery. We therefore conducted in vitro studies utilizing human smooth muscle and endothelial cells transfected with glyceraldehyde-3-phosphate dehydrogenase (GAPDH) and β2-microglobulin (B2M) siRNA in the presence of heparin, argatroban, and bivalirudin in order to determine which anticoagulant therapy is most compatible for siRNA delivery. We observed that while heparin, at clinical doses, decreases the efficiency of siRNA targeted mRNA knockdown, mRNA knockdown is not inhibited in the presence of either argatroban or bivalirudin. Our data suggests that heparin should be avoided during siRNA therapy with cationic transfection agents, and argatroban and bivalirudin should be used in its stead.","PeriodicalId":12699,"journal":{"name":"Gene Therapy","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141626527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}