Diseases of the cardiovascular system are the leading cause of mortality in the world, responsible for an average of 17.9 million deaths per year. 1 The most expressive are the ischemic heart diseases which occur due to the obstruction of blood vessels. In this scenario, some of the main alternatives to restore blood flow are autologous grafts, balloon catheters, and metal stents. However, these treatments can cause several problems in the long run, such as inflammation, thrombosis, and neointimal hyperplasia. 2 Tubular scaffolds based on tissue engineering (TE) techniques have been considered to address these problems and must mimic the structure of blood vessels with proteins of the natural tissue. The scaffolds must also be compatible with endothelial cells for tissue repair. Polymeric biomaterials are often applied for vascular and other soft TE scaffolds, due to the similarity of their properties to those of the natural tissues. 3,4 Proteins, as collagen (Col) and elastin (El), are natural polymers with "green" or environmentally safe properties. These proteins have great appeal to be used as scaffolds considering their biocompatibility, related to the interaction with cell surface receptors, 5 and natural degradation by proteases producing amino acids that are non-toxic and can be easily absorbed by the body. 6 In particular, Col provides structural support and resistance to the extracellular matrix (ECM). 7 It consists of a fibrous protein largely used as a biomaterial, because of its endogeny and interaction