Physiological plasma proteins and growth factors

Physiological plasma proteins and growth factors represent a broad and heterogeneous class of endogenous molecules circulating in the blood that are vital for systemic homeostasis. Plasma proteins include high-abundance transport proteins like albumin, which maintains oncotic pressure and carries various hydrophobic molecules, as well as specialized proteins involved in the coagulation cascade and the innate immune system (StatPearls: Plasma Protein Binding). Growth factors are a subset of signaling proteins, such as vascular endothelial growth factor (VEGF) and fibroblast growth factors (FGFs), that regulate critical cellular processes including proliferation, differentiation, and tissue repair (NCBI: Growth Factors and Cytokines). In a pharmacological context, these molecules are significant both as therapeutic agents, such as recombinant growth factors or plasma-derived immunoglobulins, and as factors influencing drug pharmacokinetics through protein binding (PubChem: Albumin). Because this entry describes a functional category rather than a specific molecular entity, it is considered a grouping of multiple distinct targets and physiological components.

Other names

Plasma proteinsSerum proteinsCirculating growth factorsBlood proteinsPlasma-derived factors

These molecules operate through diverse mechanisms: transport proteins like albumin bind and distribute ligands; clotting factors act as enzymes in proteolytic cascades; and growth factors function as ligands that activate specific cell-surface receptors to initiate signal transduction (StatPearls: Physiology, Albumin; NCBI: Growth Factors).