Abstract:
:The influence of serum on the production of retroviral vectors by the HT1080 human fibrosarcoma-derived packaging cell line FLYRD18 was investigated. A fourfold increase in virus titer was observed under serum-free conditions, as compared with medium supplemented with 10% fetal calf serum. A similar improvement was also seen for bulk transduction efficiency. Serum had a negative and dose-dependent effect on titer without affecting cell growth, virus stability, or infectivity. In contrast to virus from NIH 3T3-derived packaging cells [Hanenberg, H., et al. (1996). Nature Med. 2, 876-882], the FLYRD18-derived virus did not adhere to fibronectin or serum proteins adsorbed at the surface of culture flasks. Electron microscopy supports the conclusion that the effect of serum is at the level of virus production by the cells. Addition of soybean trypsin inhibitor had an inhibitory effect on virus production, while pretreatment of serum with trypsin was found to enhance the retroviral titer. These results suggest that protease inhibitors present in serum may be responsible for the inhibition of virus production. The exact mechanism remains, however, to be determined. As compared with medium supplemented with 10% serum, the combination of increased virus titer and absence of exogenous protein under serum-free conditions resulted in a 300-fold increase in the virus:total protein ratio in the supernatants harvested from the FLYRD18 packaging line. This improvement enhances prospects for further concentration and purification of the virus.
journal_name
Hum Gene Therjournal_title
Human gene therapyauthors
Gerin PA,Gilligan MG,Searle PF,Al-Rubeai Mdoi
10.1089/10430349950017329keywords:
subject
Has Abstractpub_date
1999-08-10 00:00:00pages
1965-74issue
12eissn
1043-0342issn
1557-7422journal_volume
10pub_type
杂志文章abstract::Foamy virus (FV) vectors are a promising gene delivery system for use in hematopoietic stem cell gene therapy. Previous FV vector marking studies in the NOD/SCID xenotransplantation model used umbilical cord blood (UCB)-derived SCID repopulating cells (SRCs) that were assayed 5-10 weeks posttransplantation. We now rep...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/10430340460732481
更新日期:2004-01-01 00:00:00
abstract::The management of disorders of the nervous system remains a medical challenge. The key goals are to understand disease mechanisms, to validate therapeutic targets, and to develop new therapeutic strategies. Viral vector-mediated gene transfer can meet these goals and vectors based on lentiviruses have particularly use...
journal_title:Human gene therapy
pub_type: 杂志文章,评审
doi:10.1089/hum.2006.17.1
更新日期:2006-01-01 00:00:00
abstract::The objective of this phase II investigation is to assess the safety and efficacy of a plasmid mediated approach to induce angiogenesis/arteriogenesis with the angiomatrix protein Del-1 (developmentally regulated endothelial locus 1), in subjects with intermittent claudication (IC) secondary to peripheral arterial dis...
journal_title:Human gene therapy
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
doi:10.1089/104303404323142060
更新日期:2004-06-01 00:00:00
abstract::Defined serum-free conditions have great conceptual advantages for the biological safety and standardization of clinical gene transfer into hematopoietic stem cells. In the only study reported to date, Sekhar et al. achieved low serum conditions by a complex concentration procedure of a retroviral supernatant initiall...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.1998.9.6-771
更新日期:1998-04-10 00:00:00
abstract::Adoptive cellular therapy provides the promise of a potentially powerful general treatment for cancer. Although this is a complex and challenging field, there have been major advances in basic and translational research resulting in clinical trial activity that is now beginning to confirm this promise. However, these ...
journal_title:Human gene therapy
pub_type: 杂志文章,评审
doi:10.1089/hum.2010.086
更新日期:2010-06-01 00:00:00
abstract::Eleven patients with moderate to severe erectile dysfunction (ED) were given a single-dose corpus cavernosum injection of hMaxi-K, a "naked" DNA plasmid carrying the human cDNA encoding hSlo (for human slow-poke), the gene for the alpha, or pore-forming, subunit of the human smooth muscle Maxi-K channel. Three patient...
journal_title:Human gene therapy
pub_type: 杂志文章,多中心研究
doi:10.1089/hum.2006.17.1165
更新日期:2006-12-01 00:00:00
abstract::Gene therapy for heart diseases requires availability of an efficient vector for gene transfer into myocardium. Recombinant adenovirus expressing the Escherichia coli beta-galactosidase (beta-Gal) gene was shown to infect rat cardiocytes efficiently in vivo. However, a time course of gene expression showed that transg...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.1995.6.10-1265
更新日期:1995-10-01 00:00:00
abstract::Gutted adenoviral (Ad) vectors have a greater cloning capacity and elicit less immune response than conventional Ad vectors. Unfortunately, clinical use of gutted vectors has been slowed by production difficulties, including low yield and a tendency for recombinant virus to emerge. These two problems are related, beca...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/10430340252809810
更新日期:2002-03-01 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::Immunotherapy with whole cell cancer vaccines has been tested in various tumor types. This study investigated the safety profile and antitumor activity of an allogeneic prostate carcinoma cell line, LNCaP, expressing recombinant human interleukin-2 and human interferon-gamma. Thirty HLA-A*0201-matched patients with pr...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.2009.101
更新日期:2009-12-01 00:00:00
abstract::The therapeutic use of neurotrophic factors for neurodegenerative diseases is promising, however, optimal methods for continuous delivery of these substances to the human central nervous system (CNS) remains problematic. One approach would be to graft genetically engineered human cells that continuously secrete high l...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.1997.8.3-331
更新日期:1997-02-10 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::Neurodegeneration in Parkinson's disease (PD) affects mainly dopaminergic neurons in the substantia nigra, where age-related, increasing percentages of cells lose detectable respiratory activity associated with depletion of intact mitochondrial DNA (mtDNA). Replenishment of mtDNA might improve neuronal bioenergetic fu...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.2009.023
更新日期:2009-08-01 00:00:00
abstract::The rapid inactivation of murine-derived retroviral vectors in human or nonhuman primate sera is largely attributed to the activity of complement mediated through the classical pathway. In this study, we have further investigated the relationship between the human complement cascade and retrovirus inactivation. Preinc...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.1995.6.4-429
更新日期:1995-04-01 00:00:00
abstract::Malignant pleural mesothelioma (MPM) is a fatal disease with a median survival of less than 14 months. For the first time, a genetically engineered vaccinia virus is shown to produce efficient infection, replication, and oncolytic effect against MPM. GLV-1h68 is a replication-competent engineered vaccinia virus carryi...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.2008.036
更新日期:2008-08-01 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::Development of multidrug resistance (MDR) is the major obstacle to successful cancer chemotherapy. We have developed Daudi human lymphoma cells that are 20-fold more resistant than the parent cell line to vincristine (VCR) by infecting cells with pHaMDR1/A retroviral vector (Daudi/MDR20). Three DNA sequences of anti-M...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/10430349950018175
更新日期:1999-05-01 00:00:00
abstract::Atrogin-1 or muscle atrophy F-box (MAFbx) is a major atrophy-related E3 ubiquitin ligase highly expressed in skeletal muscle during muscle atrophy and other disease states such as sepsis, cancer cachexia, and fasting. In this paper, we report experiments inhibiting MAFbx activity in fasting mice and in the skeletal my...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.2010.057
更新日期:2011-03-01 00:00:00
abstract::Serum-induced inactivation of retroviruses is the most critical limitation for in vivo gene transfer therapy. To solve this problem, we searched for reagents that protect retroviruses from inactivation. The effects of the protease inhibitors FOY-007 and FOY-305 and of an inhibitor of the complement pathway FUT-175, al...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.1997.8.13-1575
更新日期:1997-09-01 00:00:00
abstract::Targeted integration into a genomic safe harbor, such as the AAVS1 locus on chromosome 19, promises predictable transgene expression and reduces the risk of insertional mutagenesis in the host genome. The application of gamma-retroviral long terminal repeat (LTR)-driven vectors, which semirandomly integrate into the g...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.2019.194
更新日期:2020-02-01 00:00:00
abstract::Replication-deficient adenoviruses are known to induce acute injury and inflammation of infected tissues, thus limiting their use for human gene therapy. However, molecular mechanisms triggering this response have not been fully defined. To characterize this response, chemokine expression was evaluated in DBA/2 mice f...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/10430349950018364
更新日期:1999-04-10 00:00:00
abstract::Laminin-5 is composed of three distinct polypeptides, alpha3, beta3, and gamma2, which are encoded by three different genes, LAMA3, LAMB3, and LAMC2, respectively. We have isolated epidermal keratinocytes from a patient presenting with a lethal form of junctional epidermolysis bullosa characterized by a homozygous mut...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.1998.9.9-1359
更新日期:1998-06-10 00:00:00
abstract::The purpose of this study was to determine the safety and antitumor activity of IFN-gamma retroviral vector in patients with advanced melanoma. Seventeen patients (9 single courses, 8 multiple courses) received a total of 363 intratumor injections of IFN-gamma retroviral vector (1 x 10(7) PFU/ml administered at 0.3, 0...
journal_title:Human gene therapy
pub_type: 临床试验,杂志文章
doi:10.1089/10430349950017978
更新日期:1999-05-20 00:00:00
abstract::The enzyme hypoxanthine-guanine phosphoribosyltransferase (HGPRT) expressed by the parasite Trypanosoma brucei (Tb) can convert allopurinol, a purine analogue, to corresponding nucleotides with greater efficiency than its human homologue. We have developed a retroviral system that expresses the parasitic enzyme and te...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/10430340152528165
更新日期:2001-09-01 00:00:00
abstract::Recombinant adeno-associated virus (AAV) holds much promise for human gene therapy. While evidence indicates that AAV mediates long-term gene transfer in several different tissues, difficulty in preparing and purifying this viral vector in large quantities remains a major obstacle for evaluating AAV vectors in clinica...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/104303400750001390
更新日期:2000-10-10 00:00:00
abstract::Replication-deficient viral vectors are currently being used in gene transfer strategies to treat cancer cells. Unfortunately, viruses are limited in their ability to diffuse through tissue. This makes it virtually impossible to infect the majority of tumor cells in vivo and results in inadequate gene transfer. This p...
journal_title:Human gene therapy
pub_type: 杂志文章
doi:10.1089/hum.1998.9.8-1209
更新日期:1998-05-20 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::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::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::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