Nanoparticle vaccine delivery
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Nanotechnology is increasingly important in vaccine development. As vaccines are evolving toward less immunogenic minimalist compositions, adjuvants and delivery systems that increase the effectiveness of the antigen are of increasing importance. The use of nanoparticles in vaccine formulations not only improves antigen immunogenicity and stability, more importantly, targeted nanoparticle vaccine delivery and controlled release are also achieved. https://www.creative-biolabs.com/vaccine/nanoparticles.htm
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The document provides an overview of immunology and the immune system. It discusses key topics such as antigens, antibodies, antigen-antibody reactions, innate immunity, acquired immunity, and hypersensitivity. The immune system is made up of cells and organs that protect the body from pathogens and foreign substances. It responds to antigens through both cellular and humoral responses in order to neutralize or eliminate the antigen.
Monoclonal and polyclonal antibody
The document discusses monoclonal and polyclonal antibodies. Monoclonal antibodies recognize a single epitope of an antigen, while polyclonal antibodies recognize multiple epitopes of a single antigen. Monoclonal antibodies are produced through cell fusion and screening of hybridoma cells, allowing for large quantities of identical antibodies. Polyclonal antibodies are produced by immunizing an animal and collecting the antiserum, resulting in recognition of multiple epitopes. The advantages and disadvantages of each are provided, along with their diagnostic and therapeutic applications.
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What is oncolytic virus
Recently, the development of molecular biotechnology allows modifications of viral genomes genetically and optimizes the transformation of available viruses with weak pathogenicity. These methods are used to enhance the oncolytic effect and reduce adverse reactions to maximize both efficacy and safety. Indeed, the oncolytic virus can stimulate a pro-inflammatory tumor environment by enhancing antigen recognition and robust immune responses. It overcomes the immune evasiveness and escape of malignant cells to eliminate the tumor cells.
https://www.creative-biolabs.com/oncolytic-virus/definition-of-an-oncolytic-virus.htm
What is oncolytic virus therapy
An oncolytic virus is a form of promising therapeutic tool for the treatment of malignant tumors, which uses viruses to selectively infect and kill tumor cells and further to induce or boost specific antitumor immunity. https://www.creative-biolabs.com/oncolytic-virus/definition-of-an-oncolytic-virus.htm
Reporter-encoding Oncolytic Virus
Oncolytic viruses encoding reporter genes utilized for in vivo molecular imaging are useful to locate the distribution of oncolytic viruses in pre-clinical tests. Optical detection methods mainly include green fluorescent protein (GFP), enhanced GFP (eGFP), discosoma red fluorescent protein (DsRed), and bioluminescence imaging (BLI), which utilizes luciferases. Reporter-encoding oncolytic viruses, including vaccinia virus, adenovirus, herpes simplex virus and vesicular stomatitis virus, allow accurate tracking of gene expression, tumor metastases, viral infection as well as assessment of gene therapy.
https://www.creative-biolabs.com/oncolytic-virus/category-reporter-encoding-oncolytic-virus-293.htm
Pre-made Oncolytic VACV
Vaccinia virus can accommodate more than 30 kb of foreign DNA. Foreign genes can be stably integrated into the viral genome, resulting in efficient and long-term gene expression. The deletion of the viral genes of thymidine kinase (TK) and vaccinia growth factors (VGF) results in enhanced tumor-selectively and antitumor activity, and reduced virus virulence. https://www.creative-biolabs.com/oncolytic-virus/category-pre-made-oncolytic-vaccinia-virus-291.htm
Pre-made Oncolytic Vaccinia Virus
Oncolytic viruses are a class of antitumor agents that selectively kill tumor cells without affecting normal cells. Vaccinia virus (VACV) is a large, enveloped virus that is considered as the most potential live biotherapeutic agent because of its strong oncolytic efficacy and potent antigen presentation capability that can combine well with its natural oncolytic activities for cancer immunotherapy. Many types of modified vaccinia virus have been used for in vitro and in vivo studies, as well as clinical trials.https://www.creative-biolabs.com/oncolytic-virus/category-pre-made-oncolytic-vaccinia-virus-291.htm
Pre-made Oncolytic HSV
Partial deletion of the HSV gene results in superior packaging capacity of >30 kb foreign DNA with low toxicity as an expression vector. Multiple modified purified oncolytic herpes simplex virus (oHSV) products can avoid evading the host immune response and reduce toxicity by gene knock-out, such as ICP0, ICP4, ICP22, ICP27 or ICP47.https://www.creative-biolabs.com/oncolytic-virus/category-pre-made-oncolytic-herpes-simplex-virus-290.htm
Pre-made Oncolytic Herpes Simplex Virus
Oncolytic viruses are using for the treatment of cancer due to the specific antitumor activity in tumor cells. Herpes simplex virus (HSV) is a human neurogenic dsDNA virus that has the characteristic of life-long latent infection of neurons and allows for long-term transgene expression.https://www.creative-biolabs.com/oncolytic-virus/category-pre-made-oncolytic-herpes-simplex-virus-290.htm
Oncolytic Virus Delivery
Oncolytic viruses have the potential to powerfully and selectively kill cancer cells and have shown impressive efficacy in preclinical and clinical settings. However, their potential can be restricted by inefficient delivery into the complex tumor environment. Thus, the efficient delivery of oncolytic viruses remains a significant challenge in the field of oncology, limiting their therapeutic effect. https://www.creative-biolabs.com/oncolytic-virus/approaches-to-delivery-of-oncolytic-viruses.htm
Oncolytic Virus Application
Numerous viruses are being developed pre-clinically and clinically. An investigation of all registered clinical trials in 2017 demonstrates 78 interventional trials regarding OVs. This ability for near-universal therapeutic impact in cancer makes OVs a popular therapeutic tool. Today, both preclinical and early-stage clinical trials are intensively investigating the approach to improve oncolytic virotherapy.
https://www.creative-biolabs.com/oncolytic-virus/applications-of-oncolytic-viruses-in-cancer-treatment.htm
Oncolytic Virus Animal Model
To fully optimize oncolytic virotherapy and provide meaningful mechanistic insight, it is important to have representative animal models of oncolysis in various tumor types. https://www.creative-biolabs.com/oncolytic-virus/animal-models-for-oncolytic-virus-study.htm
Abciximab mechanism of action
Abciximab (also known as abcixifiban or c7E3 Fab), is the Fab fragment of the chimeric human-murine, monoclonal antibody 7E3. It is composed of murine variable regions and human constant regions.https://www.creativebiolabs.net/abciximab-overview.htm
Abagovomab mechanism of action
Abagovomab is a murine monoclonal anti-idiotypic antibody (MW: 165-175 kDa), produced by a mouse hybridoma and generated against OC125, which serves to functionally imitate the human cancer antigen 125 (CA-125). https://www.creativebiolabs.net/abagovomab-overview.htm
Wnt Pathway
Wnt comprises a diverse family of secreted lipid-modified signaling glycoproteins that are 350-400 amino acids in length. Wnt is an acronym in the field of genetics that stands for 'Wingless/Integrated'.https://www.creativebiolabs.net/wnt-signaling-pathway.htm
TNF Pathway
TNF works through two receptors, TNFR1 and TNFR2. TNFR1 is the major signal receptor of TNF-α. TNFR2, which mediates limited biological responses, binds to TNF-α and TNF-β. TNF signaling transduction through TNFR1 and TNFR2 can induce a variety of cellular responses, which depends on many factors, including the metabolic state of the cell and the adaptor proteins present in the cell.https://www.creativebiolabs.net/tnf-signaling-pathway.htm
TLR Pathway
Innate immune receptors, also known as pattern recognition receptors (PRRs), have been identified in the serum, on the cell surface, in endosomes, and in the cytoplasm. Toll-like receptors (TLRs) is one of the particularly important groups of PRRs.https://www.creativebiolabs.net/tlr-signal-pathway.htm
TGF-β Pathway
Transforming growth factor beta (TGF-β) is a cytokine that participates in both physiological and pathological processes.https://www.creativebiolabs.net/tgf-beta-signaling-pathway.htm
TCR Pathway
T-cell receptor (TCR) is a heterodimers composed of α and β peptide chains. TCR is mainly responsible for recognizing the antigens presented by major histocompatibility complex (MHC) molecules on the surface of antigen presenting cells (APC).https://www.creativebiolabs.net/tcr-signal-pathway.htm
RAS Pathway
Ras, which is a low-molecular-weight GDP/GTP-binding guanine triphosphatase, is the prototypical member of the Ras superfamily of proteins. https://www.creativebiolabs.net/ras-signaling-pathway.htm
PPAR Pathway
Peroxisome proliferator-activated receptors (PPARs) are ligand-activated transcription factors, which are responsible for regulating gene expression.https://www.creativebiolabs.net/ppar-signaling-pathway.htm
VPI3K-AKT Pathway
PI3K-Akt signaling pathway is one of the important signal transduction pathways in cells. It is involved in regulating cell metabolism, growth, proliferation, survival, transcription and protein synthesis by affecting the activation of downstream effector molecules. https://www.creativebiolabs.net/pi3k-akt-signaling-pathway.htm
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Nanoparticle vaccine delivery
- 1. NANOPARTICLES www.creative-biolabs.com/vaccine LIPOSOMES Liposomes can encapsulate antigen within the core or display on the surface of the liposomes for delivery, and incorporate the virus envelope glycoprotein to form virus particles. 1 IMMUNOSTIMULATING COMPLEX (ISCOM) 2 ISCOMATRIX contains antigen-free ISCOMs. ISCOMATRIX can be mixed with antigens to make ISCOMs more flexible by eliminating the limitations of hydrophobic antigens. VIRUS-LIKE PARTICLES (VLPS) 3 Virus-like particles resemble and mimic the structure of real viruses without being infectious. Since they do not contain any viral genetic material, they have significant potential to trigger a strong immune response without causing any actual harm. POLYMERIC NANOPARTICLES 4 A range of synthetic polymers are used to prepare the nanoparticles. These polymeric nanoparticles entrap antigen for delivery to certain cells or sustain antigen release by virtue of their slow biodegradation rate. INORGANIC NANOPARTICLES 5 These nanoparticles have the advantages of structural rigidity and controlled synthesis, but most are not biodegradable. EMULSION6 Nano-sized emulsion particles may exist in the form of oil-in-water or water-in-oil, where the droplet size may vary from 50 nm to 600 nm. Emulsions may carry antigens in their core, or simply be mixed with antigens for efficient vaccine delivery.