Is alkaline phosphatase biomimeticaly immobilized on titanium able to propagate the biomineralization process?

Author(s)

Andrade, Marco A. R. ^{[1, 2]} ; Derradi, Rafael ^[1] ; Simao, Ana M. S. ^[1] ; Millan, Jose Luis ^[3] ; Ramos, Ana P. ^[1] ; Ciancaglini, Pietro ^[1] ; Bolean, Mayte ^[1]

Affiliation

^[1] Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Preto, Dept Quim, BR-14040901 Ribeirao Preto, SP - Brazil

^[2] Univ Fed Uberlandia, Rua Ruy Correa, BR-38702018 Patos De Minas - Brazil

^[3] Sanford Burnham Prebys Med Discovery Inst, La Jolla, CA 92037 - USA

• Document type: Journal article
• Source: Archives of Biochemistry and Biophysics; v. 663, p. 192-198, MAR 15 2019.
• Web of Science Citations: 2

Abstract

Tissue-nonspecific alkaline phosphatase (TNAP) is a key enzyme in the biomineralization process as it produces phosphate from a number of phospho-substrates stimulating mineralization while it also inactivates inorganic pyrophosphate, a potent mineralization inhibitor. We have previously reported on the reconstitution of TNAP on Langmuir monolayers as well as proteoliposomes. In the present study, thin films composed of dimyristoylphosphatidic acid (DMPA) were deposited on titanium supports by the Langmuir-Blodgett (LB) technique, and we determined preservation of TNAP's phosphohydrolytic activity after incorporation into the LB films. Increased mineralization was observed after exposing the supports containing the DMPA:TNAP LB films to solutions of phospho-substrates, thus evidencing the role of TNAP on the growth of calcium phosphates after immobilization. These coatings deposited on metallic supports can be potentially applied as osteoconductive materials, aiming at the optimization of bone-substitutes integration in vivo. (AU)

• FAPESP's process: 17/08892-9 - Bioactive surfaces designed from Langmuir-Blodgett Films and Biominerals
• Grantee: Ana Paula Ramos
• Support Opportunities: Regular Research Grants
• FAPESP's process: 16/21236-0 - Extracellular matrix vesicles (MVs) mimetic systems to study the regulation of the biomineralization process: proteoliposomes containing NPP1 and Annexin V
• Grantee: Pietro Ciancaglini
• Support Opportunities: Regular Research Grants
• FAPESP's process: 15/00345-3 - Lipid microdomains in Langmuir-Blodgett films rich in alkaline phosphatase to obtain a Ti surface osteoinductive
• Grantee: Marco Aurélio Raz de Andrade
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 12/20946-3 - Study of the growth of calcium phosphates and carbonates on organic matrices deposited on mettalic supports: obtainment of osteoinductive biomaterials
• Grantee: Ana Paula Ramos
• Support Opportunities: Regular Research Grants
• FAPESP's process: 14/11941-3 - Are collagen and Annexin V responsible for the control in the biomineralization process?
• Grantee: Pietro Ciancaglini
• Support Opportunities: Regular Research Grants