Growth factors and chemokines

Growth factors and chemokines are broad categories of signaling proteins essential for intercellular communication and the regulation of complex biological processes. Growth factors, including families like Vascular Endothelial Growth Factor (VEGF) and Epidermal Growth Factor (EGF), are primarily involved in stimulating cellular growth, proliferation, and systemic development by activating receptor tyrosine kinases (RTKs) [1]. These molecules play critical roles in wound healing and tissue regeneration under normal physiological conditions [1]. Chemokines are a specialized family of cytokines that function as chemoattractants, directing the migration of leukocytes to specific tissues during immune surveillance and inflammatory responses via G protein-coupled receptors (GPCRs) [2]. They are categorized into four main subfamilies (CXC, CC, C, and CX3C) based on the arrangement of conserved cysteine residues [2]. In many diseases, particularly cancer and chronic inflammation, the overproduction or aberrant signaling of these molecules promotes pathological angiogenesis, tumor metastasis, and tissue destruction [1, 2]. Consequently, they are major focuses of drug development, with therapies such as monoclonal antibodies (e.g., bevacizumab) and small molecule inhibitors (e.g., maraviroc) designed to disrupt their signaling axes [3]. Therapeutic challenges include the high degree of redundancy in chemokine signaling and the potential for significant off-target effects when inhibiting growth factor pathways essential for normal homeostasis [1, 2, 3]. [1] StatPearls. "Physiology, Growth Factors." https://www.ncbi.nlm.nih.gov/books/NBK542331/ [2] Annual Review of Immunology. "Chemokines and chemokine receptors: positioning cells for host defense and immunity." https://www.annualreviews.org/doi/10.1146/annurev-immunol-032713-120145 [3] DrugBank Online. "Bevacizumab." https://go.drugbank.com/drugs/DB00112

Other names

CytokinesSignaling proteinsMitogensChemoattractant cytokines

Ligand neutralization, receptor antagonism, and inhibition of downstream signal transduction pathways.