IgG Overview
Immunoglobulin G (IgG) is the most predominant immunoglobulin in human serum and extracellular liquid, representing roughly 75% to 80% of complete immunoglobulins in serum, with a serum convergence of 9.5 to 12.5 mg/ml. It is the littlest immunoglobulin, with a run of the mill monomeric structure, created by plasma cells in the spleen, lymph hubs, bone marrow, and bursa cavum. All IgG subclasses can go through the placenta, and it is the main immunoglobulin fit for doing as such, contributing essentially to neonatal enemy of contamination invulnerability. IgG neutralizer is an enormous globulin with a sub-atomic load of around 150kDa, made out of four peptide chains. It is a tetrameric structure because it has two identical heavy chains of about 50 kDa and two identical light chains of about 25 kDa.
Mechanism of action
Antigen recognition: IgG specifically recognizes antigens on the surface of pathogens through the Fab region in its structure. These antigens are usually proteins or polysaccharides on the surface of pathogens. The Fab region of each IgG molecule has a unique antigen binding site that can accurately recognize and bind to specific antigenic determinants, thereby locking specific viruses, bacteria or other pathogens.
Neutralization: When immunoglobulins bind to key structures on the surface of pathogens, they can prevent the interaction between pathogens and host cells, thereby neutralizing their pathogenicity. IgG can bind to glycoproteins on the surface of viruses to prevent viruses from attaching to and entering host cells.
IgG is the most important antibody in the body, with antiviral, virus neutralization, antibacterial and immunomodulatory functions. IgG is also the only antibody that can cross the placenta and plays an important role in neonatal anti-infection.
Source of IgG
Human plasma
Healthy donor plasma: Through blood collection, plasma is separated from the blood of healthy volunteers, and IgG is extracted from it. Suitable for applications requiring human antibodies.
Plasma bank: Plasma from multiple donors is centrally stored, and high-purity IgG is obtained by mixing and screening.
Animal serum
Animals such as horses, rabbits, and goats: By injecting specific antigens into animals, their immune systems are stimulated to produce corresponding IgG. After collecting animal serum, specific IgG is extracted. Commonly used in scientific research reagents and diagnostic tools.
Hybridoma cells: Monoclonal antibody IgG is produced using hybridoma technology (fusion of B cells and tumor cells) to ensure high purity and specificity.
Recombinant technology
Genetic engineering: Recombinant IgG is produced through gene cloning and expression systems (such as CHO cells and HEK293 cells). This method is suitable for large-scale production of humanized antibody drugs to reduce immunogenicity.
Plant and microbial systems
Transgenic plants: Transgenic plants (such as tobacco and sunflower) are used to produce IgG, which has the advantages of low cost and large scale.
Yeast and other microorganisms: Recombinant IgG is produced through genetically engineered yeast or other microorganisms.
Application areas of IgG
Bovine colostrum supplements
Bovine colostrum is rich in IgG and is widely used in nutritional supplements for infants and adults to enhance immune function.
· Immune support
· Anti-infection: IgG can neutralize pathogens and prevent intestinal infections and respiratory diseases.
Intestinal health: Promote intestinal barrier function, reduce the colonization of harmful bacteria, and improve the balance of intestinal microecology.
· Athletes and the elderly
· Immunity enhancement: Enhance the immunity of athletes under high-intensity training and reduce the risk of colds and other infections.
Anti-inflammatory effect: Help the elderly reduce chronic inflammation and improve overall health.
Functional beverages and foods
IgG is added to various functional beverages and foods as a natural immune enhancer.
· Children's nutritional foods
Immune support: By adding IgG, help children build and maintain a healthy immune system and prevent common childhood diseases.
· Adult health products
Antioxidant and anti-inflammatory: Combined with the immunomodulatory effect of IgG, it improves overall health and disease resistance.
Infant formula
IgG is added to infant formula to simulate the immune components in breast milk and provide additional immune protection.
Simulate breast milk immune function
Passive immunity: Provide additional IgG to infants to help them resist pathogens in the environment.
Promote healthy development: Support the healthy development of infants' immune systems and reduce the risk of infection.
Oral immunotherapy
IgG is provided in the form of oral supplements to regulate intestinal immunity and improve digestive health.
Intestinal disease management
Inflammatory bowel disease (IBD): For diseases such as Crohn's disease and ulcerative colitis, oral IgG helps reduce inflammation and promote intestinal repair.
Summary
IgG plays an important role in the pharmaceutical field and nutritional supplements, providing treatment methods and health support solutions for a variety of diseases. With the continuous advancement of biotechnology, the application of IgG will be more extensive and in-depth, promoting the development of the medical and health industries. At the same time, overcoming the challenges in production and application will further enhance the application value of IgG in various fields and make greater contributions to human health.
