|
1
|
Parisi JR, Fernandes KR, Aparecida do Vale GC, de França Santana A, de Almeida Cruz M, Fortulan CA, Zanotto ED, Peitl O, Granito RN, Rennó ACM. Marine spongin incorporation into Biosilicate® for tissue engineering applications: An in vivo study. J Biomater Appl 2020; 35:205-214. [PMID: 32362163 DOI: 10.1177/0885328220922161] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Biomaterials and bone grafts, with the ability of stimulating tissue growth and bone consolidation, have been emerging as very promising strategies to treat bone fractures. Despite its well-known positive effects of biosilicate (BS) on osteogenesis, its use as bone grafts in critical situations such as bone defects of high dimensions or in non-consolidated fractures may not be sufficient to stimulate tissue repair. Consequently, several approaches have been explored to improve the bioactivity of BS. A promising strategy to reach this aim is the inclusion of an organic part, such as collagen, in order to mimic bone structure. Thus, the present study investigated the biological effects of marine spongin (SPG)-enriched BS composites on the process of healing, using a critical experimental model of cranial bone defect in rats. Histopathological and immunohistochemistry analyzes were performed after two and six weeks of implantation to investigate the effects of the material on bone repair (supplemental material-graphical abstract). Histological analysis demonstrated that for both BS and BS/SPG, similar findings were observed, with signs of material degradation, the presence of granulation tissue along the defect area and newly formed bone into the area of the defect. Additionally, histomorphometry showed that the control group presented higher values for Ob.S/BS (%) and for N.Ob/T.Ar (mm2) (six weeks post-surgery) compared to BS/SPG and higher values of N.Ob/T.Ar (mm2) compared to BS (two weeks post-surgery). Moreover, BS showed higher values for OV/TV (%) compared to BS/SPG (six weeks post-surgery). Also, VEGF immunohistochemistry was increased for BS (two weeks post-surgery) and for BS/SPG (six weeks) compared to CG. TGFb immunostaining was higher for BS compared to CG. The results of this study demonstrated that the BS and BS/SPG scaffolds were biocompatible and able to support bone formation in a critical bone defect in rats. Moreover, an increased VEGF immunostaining was observed in BS/SPG.
Collapse
Affiliation(s)
- Julia Risso Parisi
- Department of Physiotherapy, Federal University of São Carlos (UFSCar), São Carlos, SP, Brazil
| | | | | | - Alan de França Santana
- Department of Biosciences, Federal University of São Paulo (UNIFESP), Santos, SP, Brazil
| | | | - Carlos Alberto Fortulan
- Department of Mechanical Engineering, São Carlos School of Engineering São Carlos, SP, Brazil
| | - Edgar Dutra Zanotto
- Department of Materials Engineering, Vitreous Materials Laboratory (LaMaV), Federal University of São Carlos (UFSCar), São Carlos, Brazil
| | - Oscar Peitl
- Department of Materials Engineering, Vitreous Materials Laboratory (LaMaV), Federal University of São Carlos (UFSCar), São Carlos, Brazil
| | - Renata Neves Granito
- Department of Biosciences, Federal University of São Paulo (UNIFESP), Santos, SP, Brazil
| | | |
Collapse
|