title: Effect of silicone on the collagen fibrillogenesis and stability.
abstract: Collagen, the most abundant protein in mammals, is able to form fibrils, which have central role in tissue repair, fibrosis, and tumor invasion. As a component of skin, tendons, and cartilages, this protein contacts with any implanted materials. An inherent problem associated with implanted prostheses is their propensity to be coated with host proteins shortly after implantation. Also, silicone implants undergoing relatively long periods of contact with blood can lead to formation of thrombi and emboli. In this paper, we demonstrate the existence of interactions between siloxanes and collagen. Low-molecular-weight cyclic siloxane (hexamethylcyclotrisiloxane-D3) and polydimethylsiloxanes (PDMS) forming linear chains, ranging in viscosity from 20 to 12,000 cSt, were analyzed. We show that D3 as well as short-chain PDMS interact with collagen, resulting in a decrease in fibrillogenesis. However, loss of collagen native structure does not occur because of these interactions. Rather, collagen seems to be sequestered in its native form in an interlayer formed by collagen-siloxane complexes. On the other hand, silicone molecules with longer chains (i.e., PDMS with viscosity of 1000 and 12,000 cSt, the highest viscosity analyzed here) demonstrate little interaction with this protein and do not seem to affect collagen activity.
authors.affiliation: Department of Molecular and Cellular Biology, Intercollegiate Faculty of Biotechnology of the University of Gdansk and Medical University of Gdansk, Gdansk, Poland.
authors.forename: Leszek
authors.initials: L
authors.lastname: Kadziński
authors.forename: Magdalena
authors.initials: M
authors.lastname: Prokopowicz
authors.forename: Joanna
authors.initials: J
authors.lastname: Jakóbkiewicz-Banecka
authors.forename: Magdalena
authors.initials: M
authors.lastname: Gabig-Cimińska
authors.forename: Jerzy
authors.initials: J
authors.lastname: Łukasiak
authors.forename: Bogdan
authors.initials: B
authors.lastname: Banecki
mesh_terms: D024042:Collagen Type I / Q000737:chemistry*; D004129:Dimethylpolysiloxanes / Q000737:chemistry* / Q000633:toxicity; D015394:Molecular Structure; D008970:Molecular Weight; D019736:Prostheses and Implants / Q000009:adverse effects; D011474:Prosthesis Design; D066329:Protein Aggregates; D011489:Protein Denaturation; D055550:Protein Stability; D017433:Protein Structure, Secondary; D012833:Siloxanes / Q000737:chemistry* / Q000633:toxicity; D013329:Structure-Activity Relationship; D013997:Time Factors; D014783:Viscosity
chemical_list: D024042:Collagen Type I; D004129:Dimethylpolysiloxanes; D066329:Protein Aggregates; D012833:Siloxanes; C013830:baysilon; C024035:hexamethylcyclotrisiloxane
keywords: FTIR; biocompatibility; emulsion; interaction; light-scattering; micelle; polymers; protein aggregation; silica