An overview of peptide development and manufacturing

 In the peptide drug development process, the function and the activity of the peptides are enhanced to a great extent through synthetic peptide manufacturing methods as they are cost effective and cost viable. Peptide drugs are made using synthetic and genetic methods. Synthetic peptides are used as vaccines to immunize against the pathogens. 

Peptide manufacturing focusses on enhancing the relative stability and its robustness by methods of termini protection of C and N terminal by functional groups and amino acid analogs. Other ways are peptide cyclization and conjugation to increase the membrane permeability and biological activity and hence it increases the immunogenicity of the molecule. Enantiomeric replacement method ensures the stability of the peptide molecule. The genetic approach for the peptide synthesis for the development of drugs involves construction, development and screening of DNA molecules. Since the DNA sequence is already available peptide sequencing is not required. These peptides are synthesised by recombinant organisms hence the resulting drugs do not contain residues and chemical groups.

Peptide vaccines can be synthesized and are used as therapeutic vaccines for the treatment of cancer. Peptides from tumour associated antigens are incorporated to effect anti-tumour T –cell response. Peptide drugs are made by using solid phase synthesis technique. Cell penetrating peptides and cyclic peptides are modified peptide drugs used for treating complex diseases. The majority of the peptide drugs are used as hormone analogs like insulin and interfere with protein - protein interactions and therefore used in the treatment of metabolic disorders and cancer. These interactions form the crucial stage in many biological processes depending on the activity of the natural receptors like metabolism, transport, transcription, biosynthesis, translation and post translational systems. Peptide drugs are found to regulate these processes by activating or blocking specific cell receptors by enhancing or disrupting specific cellular processes.

Peptide vaccines are in vitro synthesised   and consist of 20-30 amino acids. They are highly immunogenic and trigger the desired immune response.   Their production is simple, reproducible and fast. They significantly limit the allergenic and reactogenic complications. It reduces the formation of redundant biological side components and impurities by the use of an adjuvant to stimulate long lasting protection against the pathogen.

Peptide manufacturing services emphasises consistently on the antibody development and production. It is necessary to understand the sequence formation of polypeptides and specific sequences injected to produce antibodies against that polypeptide. The antibodies developed by peptide epitope target the specific peptide sequence. Peptide immunogens produce monoclonal and polyclonal antibodies that are helpful for immunogenicity studies. Peptides synthesis helps in to function as proteins to produce antibodies. They undergo conjugation to proteins to function as immunogens. 

Antibody development utilizes solid phase synthesis method of polypeptides where the amino acid is linked with the polymer substrate acting as a catalytic surface, which being insoluble owing to the nature of the polymer is isolated easily from the soluble ones. It is a controlled reaction method but peptides must undergo proper sequence selection to get high quality antibodies. Using peptide synthesis for antibody production and development has become a revolutionary aspect in the biological life science research methods. 

Custom antibodies can also be generated by the use of the recombinant, native or fusion protein. It can also be generated by forming short peptides from short sequences of native protein used as immunogen.