Abstract:
:Gene therapy has evolved into a tempting strategy for the management of cancer and other life-threatening diseases. Various approaches employ retroviral vectors to deliver the therapeutic gene. The profound knowledge about retrovirus biology allows the generation of increasingly advanced vector systems as well as an accurate assessment and management of potential safety risks. This study focuses on the genetic stability of retrovirus producer cells as a basic safety requirement and its compromise by autotransduction. It has been shown previously that protection of retroviral packaging systems by superinfection interference is not guaranteed. The current study provides insight into the extent of autotransduction and the time point at which it occurs, and examines strategies to antagonize it. Therefore, a reconstituting vector system was used that obviates transgene expression in virus producer cells by physically separating transgene and promoter. Just on infection two functional expression cassettes are reconstituted, causing highly efficient transgene expression in transduced cells. Equipped with an enhanced green fluorescent protein-encoding gene, this vector allowed accurate quantification of autotransduced cells, which were then isolated by fluorescence-activated cell sorting and further characterized. Sequencing of recloned integrated vector copies demonstrated that high transgene expression levels were strictly associated with the presence of reverse-transcribed vector copies. Envelope protein expression levels, however, were found to be equal in autotransduced and noninfected virus producer cells. Finally, the occurrence of autotransduction could be assigned to an early time point after transfection and was successfully blocked by azidothymidine treatment, yielding a stable and homogeneous population of noninfected retrovirus producer cells.
journal_name
Hum Gene Therjournal_title
Human gene therapyauthors
Brandtner EM,Kodajova P,Knapp E,Ertl R,Tabotta W,Salmons B,Günzburg WH,Hohenadl Cdoi
10.1089/hum.2007.071subject
Has Abstractpub_date
2008-01-01 00:00:00pages
97-102issue
1eissn
1043-0342issn
1557-7422journal_volume
19pub_type
杂志文章abstract::Replacement of the p53 tumor suppressor gene is a rational approach to the management of malignant gliomas because p53 is frequently mutated or inactivated in these cancers. Major weaknesses of this approach are that malignant gliomas are mixtures of cells with wild-type and mutant p53, and that tumor cells exhibiting...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.2005.16.685
更新日期:2005-06-01 00:00:00
abstract::Lentiviral vectors are promising tools for gene transfer into the central nervous system. We have characterized in detail transduction with human immunodeficiency virus type 1 (HIV-1)-derived vectors encoding enhanced green fluorescent protein (eGFP) in the adult mouse brain. Different brain regions such as the striat...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/10430340252899019
更新日期:2002-05-01 00:00:00
abstract::The T cell co-stimulatory molecule B7-1 was transduced into a poorly immunogenic murine neuroblastoma cell line (Neuro-2a, N-2a) alone or in combination with MHC class II genes to test the ability of these genes to stimulate antitumor immunity. N-2a cells transduced with B7-1 exhibited reduced tumorigenicity, whereas ...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.1996.7.17-2059
更新日期:1996-11-10 00:00:00
abstract::Naked plasmid DNA electrotransfer offers advantages over viral-based gene delivery, including being regulatory permissive, but factors influencing expression efficiency and cell fate impact on translational utility. This study compared co-expression of red and green fluorescence reporter plasmids with differing promot...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.2018.062
更新日期:2019-02-01 00:00:00
abstract::Glioblastomas account for approximately 20% of all primary brain tumors in adults. Glioblastoma multiforme (GBM) is a highly malignant tumor. In spite of advances in surgery, chemotherapy, and radiotherapy, the life expectancy of the patient with glioblastoma is approximately 11 months. To enhance glioma-specific gene...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/1043034041648372
更新日期:2004-08-01 00:00:00
abstract::DNA vaccination is an attractive approach for tumor immunotherapy because of its stability and simplicity of delivery. Advances demonstrate that helper T cell responses play a critical role in initiating immune responses. The aim of the current study is to test whether targeting HPV-16 E7 to the endosomal/lysosomal co...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/10430349950016474
更新日期:1999-11-20 00:00:00
abstract::Human hematopoietic stem cells (HSCs) are poorly transduced by vectors based on adenovirus serotype 5 (Ad5). This is primarily due to the paucity of the coxsackievirus-Ad receptor on these cells. In an attempt to change the tropism of Ad5, we constructed a series of chimeric E1-deleted Ad5 vectors in which the shaft a...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/104303401753204562
更新日期:2001-11-01 00:00:00
abstract::Traditionally, skeletal muscle and liver are the preferred target organs for gene transfer to supply a transgene product into the systemic circulation. In this respect, adipose tissue presents a number of attractive features. However, adipose tissue transduction in vivo has not been feasible by conventional methods. T...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.2006.17.921
更新日期:2006-09-01 00:00:00
abstract::Gyrate atrophy is a progressive blindness associated with deficiency of ornithine aminotransferase (OAT). The strategy of using an autologous keratinocyte graft, modified to express high levels of OAT as an ornithine-catabolizing skin-based enzyme sink, is investigated. Two OAT-containing retroviral vectors were const...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.1997.8.17-2125
更新日期:1997-11-20 00:00:00
abstract::Hereditary tyrosinemia type 1 (HT1) is an autosomal recessive disorder caused by deficiency of fumarylacetoacetate hydrolase (FAH). It has been previously shown that ex vivo hepatocyte-directed gene therapy using an integrating lentiviral vector to replace the defective Fah gene can cure liver disease in small- and la...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.2017.252
更新日期:2018-11-01 00:00:00
abstract::Gene transfer for therapeutic angiogenesis represents a novel treatment for patients with chronic angina refractory to standard medical therapy and not amenable to conventional revascularization. We sought to assess the role of intraoperative multiplane transesophageal echocardiography (MPTEE) in guiding injection of ...
journal_title:Human gene therapy
pub_type: 临床试验,杂志文章
doi:10.1089/10430349950016951
更新日期:1999-09-20 00:00:00
abstract::Baculovirus vectors recently have been shown to be capable of efficient transduction of human hepatoma cells and primary hepatocytes in culture. This paper describes the generation of a novel recombinant baculovirus (VGZ3) in which the vesicular stomatitis virus glycoprotein G (VSV G) is present in the viral envelope....
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.1997.8.17-2011
更新日期:1997-11-20 00:00:00
abstract::pZIG(hGCSFR) is a retroviral vector that can co-express two genes and also provides alternative selection markers. This retroviral vector has been constructed to incorporate an internal ribosome entry site (IRES) element to co-express two exogenous genes in mammalian cells. Two marker/selection genes have been cloned ...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.1997.8.8-979
更新日期:1997-05-20 00:00:00
abstract::La Crosse virus (LACV)-mediated encephalitis is the most frequently reported arboviral disease in the United States, but to date no vaccine against this virus is available. We have established a new animal model, genetically targeted mice lacking a functional interferon type I receptor (IFNAR-1). These mice show an ag...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/10430349950017653
更新日期:1999-07-01 00:00:00
abstract::Direct arterial gene transfer has been previously achieved using double-balloon catheters and perforated balloons, in most cases facilitated by the use of cationic liposomes or viral vectors. These gene delivery systems, however, have been compromised by issues relating to efficacy and/or safety, and furthermore requi...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.1993.4.6-749
更新日期:1993-12-01 00:00:00
abstract::When transferring the human multidrug resistance 1 (MDR1) cDNA, FMEV retroviral vectors mediate high-dose multidrug resistance and, thus, background-free selection in primary human hematopoietic progenitor cells. Here, we analyzed strategies for co-expression of a second gene from an FMEV:MDR1 vector. When linking the...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.1998.9.1-33
更新日期:1998-01-01 00:00:00
abstract::Conditionally replicative adenovirus (CRAd) vectors are designed for specific oncolytic replication in tumor tissues with concomitant sparing of normal cells. As such, CRAds offer an unprecedented level of anticancer potential for malignancies that have been refractory to previous cancer gene therapy interventions. CR...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/10430340152710504
更新日期:2001-12-10 00:00:00
abstract::Leukocyte adhesion deficiency type I (LAD-I) is a primary immunodeficiency caused by mutations in the ITGB2 gene and is characterized by recurrent and life-threatening bacterial infections. These mutations lead to defective or absent expression of β2 integrins on the leukocyte surface, compromising adhesion and extrav...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.2016.016
更新日期:2016-09-01 00:00:00
abstract::Targeted delivery of intravenously administered genetically altered cells or stem cells is still in an early stage of investigation. We developed a method of delivering iron oxide (ferumoxide)-labeled mesenchymal stem cells (MSCs) to a targeted area in an animal model by applying an external magnet. Rats with or witho...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/104303404322959506
更新日期:2004-04-01 00:00:00
abstract::Gene therapy for hemophilia B has been shown to result in long-term expression and immune tolerance to factor IX (F.IX) after in vivo transduction of hepatocytes with adeno-associated viral (AAV-2) vectors in experimental animals. An optimized protocol was effective in several strains of mice with a factor 9 gene dele...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.2008.161
更新日期:2009-07-01 00:00:00
abstract::In the next decades, gene editing technologies are expected to be used in the treatment and prevention of human diseases. Yet, the future uses of gene editing in medicine are still unknown, including its applicability and effectiveness to the treatment and prevention of infectious diseases, cancer, and monogenic and p...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.2020.136
更新日期:2020-08-01 00:00:00
abstract::The gene therapy strategy using the hsvl-thymidine kinase gene (TK) and ganciclovir (GCV) injections that has been used for treating human glioblastomas has not been as effective as expected after the first animal experiments. A better understanding of the different steps involved in this treatment, like gene transfer...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.1997.8.16-1945
更新日期:1997-11-01 00:00:00
abstract::The central nervous system (CNS) is a predominant site of involvement in several lysosomal storage diseases (LSDs); and for many patients, these diseases are diagnosed only after the onset of symptoms related to the progressive accumulation of macromolecules within lysosomes. The mucopolysaccharidosis type VII (MPS VI...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/10430340050015707
更新日期:2000-03-01 00:00:00
abstract::We reported that SNV-derived retroviral vectors, which display single-chain antibodies on the viral surface, enable cell type-specific gene delivery into various human cells. In particular, the SNV cell type-specific gene delivery vector system appears to be well suited to transduce genes into cells of the human hemat...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/10430349950016663
更新日期:1999-11-01 00:00:00
abstract::Antitumor gene therapy using herpes simplex type 1 thymidine kinase (TKh) and ganciclovir (GCV) treatment has revealed an important intratumoral bystander effect. A whole tumor can be eliminated when only a fraction of its tumor cells express TKh. We now report that the bystander effect not only acts within a tumor, b...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.1997.8.15-1807
更新日期:1997-10-10 00:00:00
abstract::This Phase I study, "Ribozyme Gene Therapy of HIV-1 Infection" (UCSD HSC #971072, FDA BB-IND 6405), is a prospective, open-label trial of infusion of autologous gene-altered cells into asymptomatic HIV-1 seropositive individuals. The objectives of this trial are to test the safety, feasibility, and potential efficacy ...
journal_title:Human gene therapy
pub_type: 临床试验,杂志文章
doi:10.1089/hum.1998.9.16-2407
更新日期:1998-11-01 00:00:00
abstract::This multicenter phase I/II study evaluated the safety, pharmacokinetics, and antitumor effects of repeated doses of NV1020, a genetically engineered oncolytic herpes simplex virus, in patients with advanced metastatic colorectal cancer (mCRC). Patients with liver-dominant mCRC received four fixed NV1020 doses via wee...
journal_title:Human gene therapy
pub_type: 杂志文章,多中心研究
doi:10.1089/hum.2010.020
更新日期:2010-09-01 00:00:00
abstract::Adenovirus type 5 (Ad5) is a commonly used vector for gene therapy, but its efficacy is limited by high seroprevalence and off-target hepatic and splenic sequestration. In order to circumvent these limitations, the use of vectors derived from rare species adenoviruses is appealing. The opportunity to retarget rare spe...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.2014.016
更新日期:2014-04-01 00:00:00
abstract::Virotherapy is a unique modality for the treatment of cancer with oncolytic viruses (OVs) that selectively infect and lyse tumor cells, spread within tumors, and activate anti-tumor immunity. Various viruses are being developed as OVs preclinically and clinically, several of them engineered to encode therapeutic prote...
journal_title:Human gene therapy
pub_type: 杂志文章,评审
doi:10.1089/hum.2017.138
更新日期:2017-10-01 00:00:00
abstract::This study focuses on the design, construction, and evaluation of a chimeric promoter for gene therapy applications where it is desirable to have low-level basal expression of the newly transferred gene, which can be induced to higher levels of expression by the administration of pharmacologic agents that can be safel...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.1996.7.15-1883
更新日期:1996-10-01 00:00:00