The amphoteric and hydrophilic properties of cartilage surface in mammalian joints: Interfacial tension and molecular dynamics simulation studies

Janicka K, Beldowski P, Majewski T, Urbaniak W, Petelska AD (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Molecules MDPI

Book Volume: 24

Article Number: 2248

Journal Issue: 12

DOI: 10.3390/molecules24122248

Abstract

In this paper, we explain the amphoteric character of the cartilage surface by studying a lipid bilayer model built from phospholipids. We examined the interfacial tension values and molecular dynamics simulation in solutions of varying pH. The effects of negative and positive charge density (or fixed charges) on the (cartilage/cartilage) friction coefficient were investigated. In physiological (or synovial) fluid, after the isoelectric point (pI), the curve of interfacial tension decreases rapidly as it reaches pH 7.4 and then approaches a constant value at higher pH. It was shown that the curve of the interfacial tension curve exhibits a maximum value at the isoelectric point with a Gaussian shape feature. The phospholipid bilayers facilitate an almost frictionless contact in the joint. Moreover, the slippage of the bilayer and the short-range repulsion between the surfaces of the negatively charged cartilage surfaces are the main determinants of the low frictional properties of the joint.

Authors with CRIS profile

Piotr Beldowski Lehrstuhl für Multiscale Simulation of Particulate Systems

Involved external institutions

University of Białystok PL Poland (PL) Technische Militärakademie in Warschau PL Poland (PL) Kazimierz Wielki University in Bydgoszcz / Uniwersytet Kazimierza Wielkiego w Bydgoszcz (UKW) PL Poland (PL)

How to cite

APA:

Janicka, K., Beldowski, P., Majewski, T., Urbaniak, W., & Petelska, A.D. (2019). The amphoteric and hydrophilic properties of cartilage surface in mammalian joints: Interfacial tension and molecular dynamics simulation studies. Molecules, 24(12). https://dx.doi.org/10.3390/molecules24122248

MLA:

Janicka, Katarzyna, et al. "The amphoteric and hydrophilic properties of cartilage surface in mammalian joints: Interfacial tension and molecular dynamics simulation studies." Molecules 24.12 (2019).

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