Antibodies are proteins in the immune system produced by B cells, a type of white blood cell. When an antigen or foreign substance enters the body, the immune system detects it and uses antibodies to attack and eliminate the threat. Consequently, your body needs the correct supply of antibodies to enhance the immune system.
However, natural antibody formation in the body can take time, potentially leading to antibody deficiency. For research and therapeutic purposes, antibodies may be required on a large scale, which is only possible through synthetic antibodies. Additionally, specific antibodies are necessary to fight certain antigens, which necessitates the use of customized antibodies. As a result, custom antibody services have emerged to offer tailor-made antibodies.
Since their discovery, custom antibodies, a market hit 1,303.4 million by 2034, have been a game changer in the healthcare industry, from research to therapeutic applications. That’s because these services produce high-quality antibodies that help meet specific needs.
If you are curious about the benefits of custom antibody services, this guide provides you with everything you need to know.
Antibody Production Process in the Body
To appreciate custom antibody production services, you must first understand natural antibody production. The process of antibody production begins when the immune system detects antigens or foreign substances. Specialized cells respond by capturing the foreign molecules, breaking them down, and presenting them to B lymphocytes.
Contact between B cells and antigens triggers somatic hypermutation. This is the formation of a new antibody with a unique part called a paratope, or antigen-binding site. This small part of the antibody can bind to the antigen's epitope.
Each B cell produces an antigen-specific antibody that recognizes and responds to the antigen's epitope. Before release into the bloodstream, the antibodies undergo selection to ensure high specificity to the epitope.
Once in the bloodstream, the antibodies bind with the intruders, allowing the body to attack and eliminate the foreign molecules. Afterward, memory B cells are retained in the bloodstream to produce more antibodies, which will enable the body to respond quickly to similar threats.
Custom Antibody Production
Custom antibody production is the process of creating specific antibodies in a laboratory setting. It starts with injecting antigen samples into host animals. This triggers their immune systems to respond by producing antigen-specific antibodies, which can then be harvested and screened for specificity.
The process is complex, and several factors can compromise the outcome during production. Successful custom antibody production depends on using reputable services with technical expertise and specialized equipment. Such companies can carefully plan and execute the production to create highly specific and sensitive antibodies tailored to various applications.
Why Use Custom Antibody Services
Natural antibody production is a time-consuming process. The need for high-quality antibodies in the shortest timeframe to respond to new antigens, as well as large quantities for diagnostic and research purposes, has necessitated custom antibody production.
Custom antibodies offer greater selectivity and higher binding affinity than natural antibodies. Thanks to advances in biotechnology, gene synthesis companies now help produce synthetic custom antibodies.
There are many advantages to custom antibody services. Here are some of them:
1. Customization
There are two reasons why antibody customization is beneficial. First, it is necessary when the body’s natural antibodies are not antigen-specific. In such cases, an antibody can bind to non-targeted molecules. Custom antibodies can be designed with high specificity, allowing for highly accurate targeting of antigens.
Customization is also necessary when a supplier doesn't have the required antibody in stock. If so, the company is provided with a sample antigen that should ideally have at least 90% purity. Where there are no sample antigens available, the service provider can design them before creating the antibodies.
Custom antibody production services can generate either polyclonal or monoclonal antibodies. Polyclonal antibody production takes around 80 days, resulting in antibodies from different B cells that can target the same antigen at different epitopes. In monoclonal antibody production, the process can take up to 6 months, and antibodies are created to target a single epitope, often engineered to mimic human antibodies.
2. Antibody Fragments
Custom antibody production companies use advanced biotechnology to produce antibody fragments with many advantages compared to full antibodies. They include:
- Better tissue penetration: Their smaller size allows them to quickly move through tissues for improved access to the target areas.
- More rapid clearance from the body: Antibody fragments are cleared faster from the bloodstream than full antibodies. Therefore, they are often less toxic, improving safety.
- Antibody fragments are more stable: They have disulfide bonds that give them better stability than full antibodies. That means better resistance to degradation and higher reliability.
- Lower non-specific binding: With smaller binding areas, antibody fragments exhibit better specificity and reduced binding with the untargeted receptors.
- Great flexibility in antibody labeling: Antibody fragments can be chemically linked to various molecules for improved diagnostic or therapeutic efficiency.
- Reduced production cost: Antibody fragments are often cheaper to produce, making them more accessible to researchers.
3. High Specificity
Custom antibody production can amplify specificity toward target molecules. They can be engineered to target epitopes with high precision by recognizing even the slightest structural differences. This makes working with complex biological samples possible.
On the contrary, finding commercial antibodies ideal for specific uses is challenging. Although there are readily available antibodies, their quality varies, often leading to experimental failure. According to research, around US$800 million is lost on inferior antibodies annually. Using custom antibodies made for a specific use is invaluable in diagnostics, therapeutics, and research.
4. High Affinity
Affinity refers to how strongly an epitope binds to the antibody's paratope. Antibodies with high affinity bind faster to the antigen and maintain that bond even under challenging conditions. This also allows for greater sensitivity in antibody testing. On the contrary, low-affinity antibodies have weak bonds and are not as easy to detect in assays.
Regarding affinity, it's best to use antibody production services you can trust to avoid suboptimal immunization schedules. B cells that produce high-affinity antibodies are essential for proper protection against parasitic and bacterial pathogens. Using low-affinity B cells in short immunization protocols results in a mix of low- and high-affinity antibodies, which are less effective.
5. Better Quality
In terms of consistency, custom-made antibodies are superior to natural antibodies. That’s because the purity of natural antibodies is influenced by environmental, health, and genetic factors.
Given antibodies' crucial role in research and diagnosis, quality should not be compromised. Inferior antibodies will not meet expectations if they are not optimally produced. Custom antibodies have excellent homogeneity, which eliminates inconsistent results in their applications and ensures the entire project's success.
6. Quantity
Custom antibody production comes in handy when there is a need for antibodies in large quantities. It allows for large-scale application in diagnostic testing, treatment of infectious diseases, scientific research, and biosecurity. Custom antibody production services help produce high-affinity antibodies in massive quantities.
7. Time-saving
Custom antibody services are essential when working under tight deadlines, since they have the experience and capacity to produce antibodies quickly. By delivering antibodies with the required qualities, they allow users to meet strict project timelines. However, ensuring the company has the capacity and resources to meet your needs is essential. Working with a reliable producer is a surefire way to get everything right.
It's important to know that antibody production is a complex process. It goes through various stages where several factors could affect quality. Poorly produced antibodies will not meet the required standards, leading to scientific, regulatory, and financial consequences. This is another reason to work with a professional custom antibody production company.
Access to Other Services
Peptide Design and Synthesis
Custom antibody services provide various supplementary services that add quality and convenience for clients. The goal of the peptide synthesis service is to produce top-tier antibodies by accurately assembling amino acid sequences through proper modification and purification. To produce high-quality antibodies, a company needs specific capabilities, such as protein expression and advanced tools for peptide design.
Through gene synthesis, they develop a DNA sequence that is used to produce RNA molecules. The information in the mRNA is then translated for protein synthesis. To achieve this, these companies also offer insect, mammalian, and bacterial protein expression services. The synthetic protein is then purified before undergoing ELISA testing.
A reputable producer helps you determine the best antigenic peptide sequence for a successful custom antibody. They should provide peptides with the highest purity, at least 85%, which is enough to create an immunogen ideal for antibody production.
Isolation and Purification of Antibodies
After peptide engineering or in cases where the client already has high-purity peptides, and design is unnecessary, the company proceeds to antibody purification. This process entails isolating specific antibodies from ascites fluid, serum (for polyclonal antibodies), or hybridoma cell culture supernatant for monoclonal antibodies.
The purification of antibodies is necessary to prevent unwanted interactions with other protein molecules. It also results in high-quality antibodies with superior purity for various applications.
Antibody Labeling
Through antibody labeling services, custom antibody production allows for better control over an antibody’s characteristics. This is achieved through the covalent attachment of gold nanoparticles, fluorescent dyes, enzymes, biotin, or radioactive isotopes to antibodies for detection at target sites. The result is labeled antibodies with high affinity, specificity, and consistency. However, the labeling method used depends on the desired outcome of the assay.
Antibody Characterization
Antibody characterization is essential in both biopharmaceutical development and research. Current technology produces therapeutic proteins with heterogeneous profiles due to various modifications occurring across the production stages. As such, thorough characterization is required to ensure safe and replicable therapeutic proteins. Custom antibody production services use various techniques to ensure they produce thoroughly characterized antibodies.
Monoclonal Antibody Sequencing & Hybridoma Selection
Hybridoma selection helps in identifying and isolating hybridomas that generate desired monoclonal antibodies. It begins with hybridoma development, which entails generating monoclonal antibodies by fusing antibody-producing B cells with myeloma cells to form immortalized cell lines capable of producing identical antibodies in large quantities.
In hybridoma selection, B cells fused with myeloma cells are separated from those that did not fuse. The goal is to select hybridoma cells that produce quality antibodies with the required affinity and specificity. The process involves incubating the cell mixture obtained from the host animal’s spleen for up to 14 days in HAT (hypoxanthine-aminopterin-thymidine) medium, a selection medium that only allows fused cells to survive.
After selecting and cloning hybridoma cells, they produce monoclonal antibodies, which can then be analyzed through monoclonal antibody sequencing. This technique determines the amino acid sequence in the variable regions (the tips of the Y-shaped molecule) to identify those with high specificity for binding antigens. This allows the identification and characterization of antibodies to enhance their efficiency and production for therapeutic, diagnostic, and research use.
Gene Synthesis
Gene synthesis services are also available from custom antibody service providers. This technology allows for the artificial development of specific DNA sequences in the laboratory. These synthetic genes allow researchers in different fields to create custom genes that enable the expression of particular proteins, like antibodies, in various host systems.
The companies offer different gene synthesis services, including gene assembly, cloning, and codon optimization, to meet the varied needs of researchers. Through the use of advanced technology, custom gene synthesis is reliable, accurate, and fast. This allows the creation of high-quality genes on a large scale to ensure the completion of successful projects.
Antibody Testing
Apart from standard ELISA testing of custom antibodies, these companies offer other assay services that help validate antibodies for specific uses. This service is useful to researchers who lack the resources to validate their own samples and need fully validated antibodies.
For those who want to perform their own validation, a custom ELISA kit generation services are helpful. These services create reliable kits that allow for the quantification and detection of unique antigens. However, the service provider should optimize the kits extensively to ensure successful assays.
Conclusion
There are many advantages to custom antibody services that drive various advancements in the medical field. Unique, custom-made polyclonal and monoclonal antibodies play a crucial role in the research and treatment of autoimmune diseases, asthma, and cancer. Designing and producing customized antibodies improves their therapeutic effects because of better affinity and precision. It also prolongs their half-life, which increases their efficacy.
However, creating new custom antibodies is a lengthy and challenging process that requires significant investment. The success of the process depends on many factors, from the intended use to the reliability of quality control. Leveraging the expertise, experience, and state-of-the-art facilities of top custom antibody production companies guarantees success in your projects. From design to antibody production, they provide peace of mind, allowing you to focus on other essential tasks.