LUBRIJOINT

Molecular Mechanism of Synovial Joint Lubrication

Coordinatore	TECHNION - ISRAEL INSTITUTE OF TECHNOLOGY    more  Organization address address: TECHNION CITY - SENATE BUILDING city: HAIFA postcode: 32000 contact info Titolo: Mr. Nome: Mark Cognome: Davison Email: send email Telefono: +972 4 829 4854 Fax: +972 4 823 2958
Nazionalità Coordinatore	Israel [IL]
Totale costo	45˙000 €
EC contributo	45˙000 €
Programma	FP7-PEOPLE Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013)
Code Call	FP7-PEOPLE-2007-2-2-ERG
Funding Scheme	MC-ERG
Anno di inizio	2009
Periodo (anno-mese-giorno)	2009-06-01   -   2014-01-14

 Partecipanti

#	participant	country	role	EC contrib. [€]
1	TECHNION - ISRAEL INSTITUTE OF TECHNOLOGY  Organization address address: TECHNION CITY - SENATE BUILDING city: HAIFA postcode: 32000 contact info Titolo: Mr. Nome: Mark Cognome: Davison Email: send email Telefono: +972 4 829 4854 Fax: +972 4 823 2958	IL (HAIFA)	coordinator	0.00

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 Obiettivo del progetto (Objective)

'This application is concerned with the study of the molecular basis of skeletal joint lubrication in order to improve the design of artificial joint prostheses. These joints eventually fail mainly because of problems associated with inadequate lubrication and revision surgery is an increasingly expensive burden as the population ages. A better understating of such processes should lead to better strategies for minimizing lubrication breakdown in natural joints, as well as to strategies for improving lubrication and wear of prosthetic joint implants and other biological surfaces where prevention of adhesion is required. This proposal seeks to investigate the molecular basis of the remarkably efficient lubrication in mammalian synovial joints, by constructing surfaces partly analogous in structure to that of articular cartilage and measuring forces between them under strictly controlled conditions. Using a surface force balance apparatus, we intend to measure the normal and friction forces between layers of (i) negatively charged hyaluronic acid (HA)-aggrecan (ii) lubricin and HA-aggrecan and (iii) HA-aggrecan and phosphatidylcholine-based phospholipids (PL). Firstly, a pre-biotynilated HA will be attached to mica surface via streptavidin. Aggrecan, extracted from mammalian cartilage, will be added to the HA-coated mica to form supramolecular aggregates similar to those at the cartilage/synovium interface. Secondly, a well-characterized lubricin layers and in a later stage fluorescent or radio-labeled PL will be adsorbed onto the HA-aggrecan mica surface and the interactions studied. Our ultimate goal is to address the interactions between lubricin, PL and HA – the main players in synovial lubrication. At each stage of the project, mica-attached layers will be characterized using AFM, X-ray photoelectron spectroscopy and SFB, and their tribological properties will be examined, on a nanometer scale, in a wide range relevant to physiological conditions.'