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  • gene delivery system  (2)
  • Gene therapy.  (1)
  • block copolymers  (1)
  • cationic lipids  (1)
  • 1
    Online Resource
    Online Resource
    Lisse :Taylor & Francis Group,
    Keywords: Drug delivery systems. ; Drug targeting. ; Gene therapy. ; Genetic vectors. ; Electronic books.
    Description / Table of Contents: 1. Present and Future Status of Gene Therapy 2. DNA Packaging in Non Viral Systems 3. Biological Barriers to Gene Transfer 4. Therapeutic Applications of Lipid-Based Gene Delivery Systems 5. Polycation-based Delivery Systems for Receptor-Mediated Gene Delivery 6. DNA Delivery Systems Based on Synthetic Peptides 7. Expression Plasmids for Non-Viral Gene Therapy 8. Gene Therapy Clinical Trials for Cystic Fibrosis 9. Polymeric Gene Delivery Systems for In Vivo Gene Therapy 10. Intravascular Delivery of Naked Plasmid DNA 11. Cationic Lipid-Based Gene Delivery Systems 12. Gene-based Vaccines 13. Gene Therapy for Cancer: Strategies and Review of Clinical Trials.
    Type of Medium: Online Resource
    Pages: 1 online resource (300 pages)
    Edition: 1st ed.
    ISBN: 9780203303818
    DDC: 616.042
    Language: English
    Note: BOOK COVER -- HALF-TITLE -- TITLE -- COPYRIGHT -- DEDICATION -- CONTENTS -- PREFACE TO THE SERIES -- PREFACE -- CONTRIBUTORS -- 1. PRESENT AND FUTURE STATUS OF GENE THERAPY -- GENE THERAPY OR GENE DELIVERY? -- GENE THERAPY: A PARADIGM -- THE FUTURE OF GENE THERAPY -- A NOVEL WAY TO TREAT METABOLIC DISEASE -- RETROVIRAL VECTORS, A PROTOTYPIC GENE THERAPY SYSTEM -- DEFECTIVE VIRUSES AND TRANS-COMPLEMENTATION -- IMMUNE RESPONSES: THE BANE OF GENE THERAPY? -- A THIRD UNANTICIPATED PROBLEM: RECEPTOR EXPRESSION -- IMMUNE RESPONSES: A BOON FOR GENE THERAPY? -- WHAT FUTURE FOR GENE THERAPY? -- REFERENCES -- 2. EXPRESSION PLASMIDS FOR NON-VIRAL GENE THERAPY -- INTRODUCTION -- EXPRESSION PLASMID STRUCTURE -- Bacterial Elements -- Mammalian Transcription Unit -- Enhancer/Promoter -- 5′ Untranslated Region -- Intron -- Coding Sequence -- 3′ Untranslated Region -- Poly(A) Signal -- MULTIVALENT EXPRESSION PLASMIDS -- Multiple Transcription Units Per Plasmid -- Multicistronic mRNA (IRES-Dependent Translation) -- Alternative RNA Splicing -- IMMUNOSTIMULATORY SEQUENCES -- PERSISTENCE -- Preventing Promoter Attenuation -- Replication/Nuclear Retention -- Integration -- Immune Response -- TISSUE-SPECIFIC EXPRESSION -- Muscle -- Liver -- Lung -- Tumors -- Inducible Promoters -- DRUG-REGULATED EXPRESSION SYSTEMS -- Tetracycline System -- Rapamycin System -- Antiprogestin System -- CONCLUDING REMARKS -- REFERENCES -- 3. DNA PACKAGING IN NON-VIRAL SYSTEMS -- INTRODUCTION -- ASSEMBLY OF POLYAMINE-DNA COMPLEXES: DNA CONDENSATION -- The Morphology of Polyamine-DNA Complexes -- Phenomenological Models for DNA Condensation by Polyamines -- Quantitative Models for DNA Condensation by Polyamines -- Manning's Counterion Condensation Theory -- The Forces of DNA Condensation -- The Coil-Globule Transition as a Model for DNA Condensation -- A Kinetic Model for DNA Condensation. , DNA PACKAGING BY POLYMER CROWDING EFFECTS -- ASSEMBLY OF LIPID-DNA COMPLEXES -- Internal Model -- Electrostatic Model -- Coated Electrostatic Model -- Spaghetti and Meatball Model -- Mixed Model -- Micellar Aggregate Model -- Hydrophobic Complex Model -- LINC (lipid interactive-non condensing) Structures -- DISCUSSION -- REFERENCES -- 4. BIOLOGICAL BARRIERS TO GENE TRANSFER -- INTRODUCTION -- INTRAVENOUS ADMINISTRATION AND BARRIERS TO EXTRAVASATION -- Biodistribution of Colloidal Systems -- Interactions with Blood Components -- Biodistribution of Gene Delivery Systems -- EPITHELIAL BARRIERS -- BIODISTRIBUTION WITHIN TISSUES -- CELLULAR INTERNALIZATION -- Ligand-mediated Uptake -- INTRACELLULAR BARRIERS -- Escape from the Degradative Pathway -- Transport within the Cytoplasm -- Delivery of DNA to the Nucleus -- REFERENCES -- 5. CATIONIC LIPID-BASED GENE DELIVERY SYSTEMS -- INTRODUCTION -- DNA PLASMID DESIGN, TRANSFECTION AND GENE EXPRESSION -- PHASE BEHAVIOR OF DNA -- CATIONIC LIPIDS AND THEIR PHASE BEHAVIOR -- INTERACTIONS OF CATIONIC LIPIDS AND DNA -- STRUCTURE OF THE COMPLEXES -- GENOSOME PREPARATION -- TRANSFECTION AND GENE EXPRESSION IN VITRO AND IN VIVO -- STRUCTURE ACTIVITY RELATIONSHIPS -- CONCLUSION -- REFERENCES -- 6. THERAPEUTIC APPLICATIONS OF LIPID-BASED GENE DELIVERY SYSTEMS -- INTRODUCTION -- REQUIREMENTS FOR OPTIMAL LIPID-BASED GENE TRANSFER -- Pharmacological Considerations -- Transport from the Site of Administration to Target Tissues or Cells -- Intracellular Factors Influencing Transgene Expression from Lipoplex -- EFFECTS OF FORMULATION OF LIPID-BASED DELIVERY SYSTEMS -- Influence of Formulation -- Biological Stability and Pharmacokinetics -- Organ Specificity of Transgene Expression -- Duration of Transgene Expression -- Toxicity -- SCALE UP CONSIDERATIONS OF LIPID PREPARATIONS -- Shelf Stability -- Preparation and Manufacturing. , THERAPEUTIC APPLICATIONS OF LIPID-BASED SYSTEMS -- CONCLUSION -- REFERENCES -- 7. POLYMERIC GENE DELIVERY SYSTEMS FOR IN VIVO GENE THERAPY -- INTRODUCTION -- POLYVINYLPYRIDINIUM-BASED POLYMERS -- CHITOSAN-BASED SYSTEMS -- HYDROXYLATED NYLONS -- POLYETHYLENIMINES -- DENDRIMERS -- METHACRYLATE-BASED POLYMERS -- PINC SYSTEMS -- GELATIN-BASED SYSTEMS -- SUSTAINED RELEASE POLYMERIC SYSTEMS -- OTHER POLYMERIC SYSTEMS -- CONCLUDING REMARKS -- REFERENCES -- 8. POLYCATION-BASED DELIVERY SYSTEMS FOR RECEPTOR-MEDIATED GENE DELIVERY -- POLYELECTROLYTE REACTION AND VECTOR SELF-ASSEMBLY -- Techniques for Determination of Complex Formation -- TARGETED DELIVERY OF POLYELECTROLYTE DNA COMPLEXES TO SPECIFIC CELLS -- Transferrin-mediated Targeting -- Targeting Using the Asialoglycoprotein Receptor -- Targeting Using Other Ligand Systems -- DELIVERY OF GENES FROM THE ENDOSOME/LYSOSOME INTO THE CYTOPLASM -- Chloroquine and Other Weak Bases -- Poly(ethylene imine) and Starburst™ Dendrimers -- Influenza Virus Hemagglutinin Peptides -- Synergistic Effects of Transfection Agents -- NUCLEAR DELIVERY AND EFFICIENCY OF TRANSCRIPTION -- Direct Intracytoplasmic Injection -- Direct Intranuclear Injection -- SYSTEMIC DELIVERY OF POLYELECTROLYTE COMPLEXES -- Barriers to Successful Systemic Gene Delivery -- Nuclease Degradation of DNA in the Bloodstream -- Activation of the Complement Cascade -- Interaction with Serum Proteins -- In Vitro Analysis of Protein Binding -- Oriented Self-assembly Using Block Copolymers to Inhibit Protein Binding -- CONCLUDING REMARKS -- REFERENCES -- 9. DNA DELIVERY SYSTEMS BASED ON SYNTHETIC PEPTIDES -- INTRODUCTION -- Itinerary of a Non-viral DNA Delivery System -- Why Synthetic Peptides? -- DNA CONDENSING PEPTIDES -- Poly-(L-Lysine) -- Synthetic Cationic Peptides -- Lipophilic Cationic Peptides -- ENDOSOMOLYTIC PEPTIDES. , Influenza HA Variants and JTS-1 -- GALA -- NUCLEAR LOCALIZATION SEQUENCES -- SUMMARY AND PERSPECTIVE -- ACKNOWLEDGEMENTS -- REFERENCES -- 10. GENE-BASED VACCINES -- WHAT ARE GENE-BASED VACCINES? -- OVERVIEW OF IMMUNE RESPONSES TO VACCINES -- WHAT ARE THE SHORTCOMINGS OF ANTIGEN-BASED VACCINES? -- ADVANTAGES OF GENE-BASED VACCINES -- DESIGN AND MECHANISM OF GENE-BASED VACCINES -- Basic Design of Plasmid DNA Vaccines -- Methods of DNA Vaccine Delivery -- Nature and Mechanism of Antigen Presentation and T-Cell Responses -- Nature and Mechanism of Humoral Responses -- POTENTIAL APPLICATIONS FOR GENE-BASED VACCINES -- Prophylactic Vaccination Against Infectious Diseases -- Immunotherapeutic Vaccination for Chronic Infections -- Immunotherapy for Cancer -- OTHER CONSIDERATIONS -- Safety and Regulatory Issues -- Implications for Gene Therapy -- Gene Vaccines as a Research Tool -- REFERENCES -- 11. INTRAVASCULAR DELIVERY OF NAKED PLASMID DNA -- INTRODUCTION -- INTERSTITIAL DELIVERY TO MUSCLE -- INTRAVASCULAR DELIVERY TO MUSCLE -- INTRAVASCULAR DELIVERY TO LIVER -- CONCLUSIONS -- REFERENCES -- 12. GENE THERAPY CLINICAL TRIALS FOR CYSTIC FIBROSIS: VIRAL AND NON-VIRAL APPROACHES -- INTRODUCTION -- THE GOALS OF CF GENE THERAPY -- CF AIRWAY BIOLOGY -- CELLULAR TARGETS IN CF GENE THERAPY -- GENE TRANSFER-HOW MUCH IS ENOUGH? -- IN VIVO PRECLINICAL STUDIES -- VIRAL VECTORS -- Adenovirus -- Adeno-associated Virus (AAV) -- NON-VIRAL DELIVERY SYSTEMS -- PHASE 1 CLINICAL TRIALS: VECTORS AND DOSAGES -- Viral -- Non Viral Delivery Systems -- CRITICAL REVIEW OF RESULTS AND DESIGN -- THE WAY FORWARD -- SUMMARY -- REFERENCE -- 13. GENE THERAPY FOR CANCER: STRATEGIES AND REVIEW OF CLINICAL TRIALS -- INTRODUCTION -- METHODS FOR GENE TRANSFER INTO SOLID TUMORS -- Non-viral or DNA-Mediated Gene Transfer into Solid Tumors -- Viral-Mediated Gene Transfer into Solid Tumors. , Retroviral Vectors -- Pseudotyped Retroviral Vectors -- Adenoviral Vectors -- Second Generation Adenoviral Vectors -- Adeno-associated Viral Vectors (AAV) -- Other Viral Vectors -- GENERAL APPROACHES FOR GENE THERAPY OF SOLID TUMORS -- GENE THERAPY STRATEGIES AND CLINICAL TRIALS FOR SOLID TUMORS -- Drug Sensitivity Genes and "Suicide Genes" -- Herpes Simplex Virus Thymidine Kinase Gene Therapy -- Cytosine Deaminase Gene Therapy -- Drug Sensitivity and Suicide Gene Therapy Clinical Trials -- Immunomodulation Using Gene Therapy -- Cytokine Genes -- Granulocyte-Monocyte Colony Stimulating Factor (GM-CSF) -- Interleukin-2 (IL-2) -- Interleukin-4 (IL4) -- Interleukin-7 (IL-7) -- Interleukin-12 (IL-12) -- Interferon-gamma (INF-g) -- Tumor Necrosis Factor (TNF) -- Introduction of Major Histocompatibility Complex (MHC) Genes -- Co-stimulatory Molecules -- Tumor-Specific Antigens -- Tumor Suppressor and Oncogene Inactivation Gene Therapy -- Oncogene-Targeted Antisense Clinical Trials -- p53 Gene Therapy Clinical Trials -- SUMMARY -- REFERENCES -- INDEX.
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Pharmaceutical research 12 (1995), S. 1435-1438 
    ISSN: 1573-904X
    Keywords: surface tension ; micelles ; block copolymers ; phagocytosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Purpose. This work was carried out to determine the surface tension of block copolymer micelles of 14C labelled ABA poly (oxyethylene-bi-isoprene-b-oxyethylene) which have a long circulating half life in animals. Methods. The method used was that of phagocytosis. The percentage of micelles phagocytosed by human mononuclear cells was determined in solutions of different surface tension. Results. The values obtained were 72 mN/m which may be predicted for a particle with a long circulating half life in animals. The method also gave an estimate of the surface tension for the mononuclear cells. Conclusions. This technique has the advantage of determining the surface tension of highly hydrated small particles including stable micelles in an environment similar to that in which they normally exist.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1573-904X
    Keywords: muscle ; DNA plasmid ; gene delivery system ; polyvinyl pyrrolidone ; polyvinyl alcohol ; non-viral gene therapy ; gene expression system
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Purpose. DNA plasmids (pDNA) can be taken up by and expressed in striated muscle after direct intramuscular injection. We have developed interactive polymeric gene delivery systems that increase pDNA bioavailability to muscle cells by both protecting pDNA from nucleases and controlling the dispersion and retention of pDNA in muscle tissue. Methods. A DNA plasmid, containing a CMV promoter and a β-galactosidase reporter gene (CMV-β-gal), was injected either in saline or formulated in polyvinyl pyrrolidone (PVP) and polyvinyl alcohol (PVA) solutions. Interactions between PVP and pDNA were assessed by dynamic dialysis, Isothermal Titration Calorimetry (ITC), and Fourier-Transformed Infra Red (FT-IR) spectroscopy. Formulations (50 µl) were injected into rat tibialis muscles after surgical exposure. Immuno-histochemistry for β-gal was used to visualize the sites of expression in muscle. Results. β-gal expression using pDNA in saline reached a plateau while β-gal expression using PVP formulations increased linearly in the dose range studied (12.5–150 µg pDNA injected) and resulted in an increase in the number and distribution of cells expressing β-gal. The interaction between PVP and pDNA was found to be an endothermic process governed largely by hydrogen-bonding and results in protection of pDNA from extracellular nucleases. Conclusions. Significant enhancement of gene expression using interactive polyvinyl-based delivery systems has been observed. The improved tissue dispersion and cellular uptake of pDNA using polyvinyl-based systems after direct injection into muscle is possibly due to osmotic effects.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1573-904X
    Keywords: gene transfer ; airways ; cationic lipids ; surface charge ; co-lipid content ; topology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Purpose. Cationic lipids are capable of transferring foreign genes to the pulmonary epithelium in vivo. It is becoming increasingly clear that factors other than lipid molecular structure also influence efficiency of delivery using cationic lipid systems. This study is aimed at evaluating the effect of formulation variables such as cationic lipid structure, cationic lipid/DNA ratio, particle size, co-lipid content and plasmid topology on transgene expression in the lung. Methods. The effect of varying the surface and colloidal properties of cationic lipid-based gene delivery systems was assessed by intratracheal instillation into rats. An expression plasmid encoding chloramphenicol acetyl transferase (CAT) was used to measure transgene expression. Results. Cationic lipid structure, cationic lipid/DNA ratio, particle size, co-lipid content and topology of the plasmid, were found to significantly affect transgene expression. Complexation with lipids was found to have a protective effect on DNA integrity in bronchoalveolar lavage fluid (BALF). DNA complexed with lipid showed enhanced persistence in rat lungs as measured by quantitative polymerase chain reaction. Conclusions. Fluorescence microscopy analysis indicated that the instilled formulation reaches the lower airways and alveolar region. Data also suggests cationic lipid-mediated gene expression is primarily localized in the lung parenchyma and not infiltrating cells isolated from the BALF.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1573-904X
    Keywords: gene delivery system ; gene targeting ; glycopeptide ; hepatocyte ; transfection efficiency
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Purpose. To design, synthesize, and test synthetic glycopeptide-baseddelivery systems for gene targeting to hepatocytes by systemicadministration.Methods. All peptides were synthesized by the solid phase methoddeveloped using Fmoc chemistry on a peptide synthesizer. The bindingof galactosylated peptides to HepG2 cells and accessibility of thegalactose residues on particle surface was demonstrated by acompetition assay using 125I-labeleld asialoorosomucoid and RCA lectinagglutination assay, respectively. DNA plasmid encoding chloramphenicolacetyl transferase (CAT) gene was complexed with a tri-galactosylatedpeptide (GM245.3) or tri-galactosylated lipopeptide (GM246.3) in thepresence of an endosomolytic peptide (GM225.1) or endosomolyticlipopeptide (GM227.3) to obtain DNA particles of 100–150 nm insize. The plasmid/peptide complexes were added to HepG2 cell culturesor intravenously administered by tail vein injection into normal miceor rats. Plasmid uptake and expression was quantified by qPCR andELISA, respectively.Results. Multiple antennary glycopeptides that have the ability tocondense and deliver DNA plasmid to hepatocytes were synthesized andcomplexed with DNA plasmid to obtain colloidally stable DNA/peptidecomplexes. Addition of DNA/GM245.3/GM225.1 peptide complexes(1:3:1 (−/+/−)) to HepG2 cell cultures yielded CAT expression intransfected cells. The transfection efficiency was significantly reducedin the absence of galactose ligand or removal of endosomolytic peptide.Intravenous administration of DNA/GM245.3 peptide complexes (1:0.5(−/+)) into the tail vein of normal rats yielded DNA uptake in theliver. Substitution of GM245.3 by galactosylated lipopeptide GM246.3resulted in more stable DNA particles, and a 10-fold enhancement inliver plasmid uptake. CAT expression was detectable in liver followingintravenous administration of DNA/GM246.3 complexes. Addition ofendosomolytic lipopeptide GM227.3 into the complexes(DNA/GM246.3/GM227.3 (1:0.5:1 (−/+/−))) yielded a 5-fold increase inCAT expression. Liver expression was 8-fold and 40-fold higher thanlung and spleen, respectively, and localized in the hepatocytes only.The transfection efficiency in liver was enhanced by increasing DNAdose and injection volume. The plasmid uptake and expression in liverusing DNA/GM246.3/GM227.3 complexes was 100-200-fold higherthan DNA formulated in glucose. Tissue examination and serumbiochemistry did not show any adverse effect of the DNA/GM246.3/GM227.3 (1:0.5:1 (−/+/−)) complexes after intravenous delivery.Conclusions. Gene targeting to hepatocytes was achieved by systemicadministration of a well-tolerated synthetic glycopeptide-baseddelivery system. The transfection efficiency of this glycopeptide deliverysystem was dependent on peptide structure, endosomolytic activity,colloidal particle stability, and injection volume.
    Type of Medium: Electronic Resource
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