• Cell–ECM adhesion and matrix receptors coordinate how fibroblasts and epidermal cells interact with collagen and basement membranes, via a plasma membrane glycoprotein adhesion mediator, fibronectin–collagen associations, and pericellular matrix organization that shapes attachment on native and denatured collagen [1], [4], [5], [8], [11], [18].

• Collagen biosynthesis, processing, and cross-linking sit at the core of matrix biology: from structural collagen synthesis in cultured fibroblasts and collagen’s primary sequence to intramolecular cross-links, secretion analysis, and matrix remodeling via collagenases [3], [9], [13], [14], [15], [19].

• Epidermal/keratinocyte biology in matrix contexts reveals how adhesion, basement membrane interactions, and growth factor signaling govern skin development, colony formation, and maturation of keratinocytes in culture [5], [6], [12], [20].

• Tissue engineering emphasizes matrix-directed morphogenesis: fibroblast-driven contraction of collagen lattices yields tissue-like structures, underscoring collagenous matrices’ role in cell adhesion, growth, and organized tissue formation [8], [9], [19].

• Matrix remodeling through proteolysis highlights collagenase production, activity, purification, and inhibition in skin fibroblasts, illustrating how proteolytic remodeling governs matrix turnover [7], [15], [17].