Recombinant antibodies, also known as genetically engineered antibodies, refer to antibodies obtained through the following process: first, the corresponding gene sequences of antibodies are modified and recombined as needed using DNA recombination technology, then constructed into plasmids, and finally the constructed plasmids are transfected/transformed into suitable host cells for expression via protein heterologous expression technology.
In the field of monoclonal antibody preparation, cell fusion is a key link in obtaining hybridoma cells. The purpose is to fuse B lymphocytes and myeloma cells together so that the genetic material of the two cells can be recombined with each other. The hybridoma cells obtained in this way can not only maintain the function of B cells secreting antibodies, but also obtain the characteristics of unlimited proliferation of myeloma cells.
In the preparation of monoclonal antibodies and polyclonal antibodies, animal immunization is one of the core steps. Its purpose is to stimulate the animal's immune system to produce specific antibodies against the target antigen. The immunization procedures for the two types of antibodies share certain commonalities, but also exhibit differences due to their distinct preparation objectives.
Selecting the appropriate secondary antibody is the core link to ensure the accuracy of experimental results, focusing on the characteristics of the primary antibody, experimental methods and detection needs, mainly considering the following factors: 1. Match the source species of the primary antibody; 2. Match the antibody subtype of the primary antibody; 3. Select markers according to the experimental method; 4. Pay attention to specificity and purification methods; 5. Avoid species cross-reactivity
Both mAbs and pAbs have their own distinct characteristics and advantages. Monoclonal antibodies exhibit high specificity and are less prone to cross-reactivity. Once a hybridoma cell line or recombinant expression system is successfully established, theoretically unlimited production can be achieved, which ensures the stability of supply and the possibility of large-scale application. The advantage of polyclonal antibodies is that they can recognize multiple epitopes, which are especially suitable for detecting less abundant proteins, and can play a natural role in signal amplification in some detection methods.
Antibodies, also known as immunoglobulins (Ig), are a class of highly specific glycoproteins produced by the immune system, particularly by B lymphocytes, in response to antigenic stimulation. They are the core effector molecules of adaptive humoral immunity and play an irreplaceable role in defending against pathogen infections, clearing abnormal cells, and maintaining homeostasis within the body.
