13 Publication(s) found
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Rheumatoid Arthritis, Rheumatology, Extracellular Matrix Research
17. Feb 2017

The minor collagens in articular cartilage

Articular cartilage is a connective tissue consisting of a specialized extracellular matrix (ECM) that dominates the bulk of its wet and dry weight. Type II collagen and aggrecan are the main ECM proteins in cartilage. However, little attention has been paid to less abundant molecular components, es…

Extracellular Matrix Research
27. Jul 2016

Quantification of fibronectin as a method to assess ex vivo extracellular matrix remodeling

Altered architecture, composition and quality of the extracellular matrix (ECM) are pathological hallmarks of several inflammatory and fibro-proliferative pathological processes such as osteoarthritis (OA), rheumatoid arthritis (RA), fibrosis and cancer. One of the most important components of the E…

Rheumatology
16. Jun 2016

Chondrocyte activity is increased in psoriatic arthritis and axial spondyloarthritis

BACKGROUND:
Psoriatic arthritis (PsA) and axial spondyloarthritis (axSpA) are chronic inflammatory rheumatic diseases with complex origins. Both are characterized by altered extracellular matrix remodeling in joints and entheses that results in destructive and osteochondral proliferative lesions. T…

Rheumatology, Osteoarthritis
24. Apr 2015

The effect of protease inhibitors on the induction of osteoarthritis-related biomarkers in bovine full-depth cartilage explants

OBJECTIVE:
The specific degradation of type II collagen and aggrecan by matrix metalloproteinase (MMP)-9, -13 and ADAMTS-4 and -5 (aggrecanase-1 and -2) in the cartilage matrix is a critical step in pathology of osteoarthritis (OA). The aims of this study were: i) To investigate the relative contri…

Osteoarthritis, Rheumatology
17. Oct 2014

Cartilage turnover reflected by metabolic processing of type II collagen: a novel marker of anabolic function in chondrocytes

The aim of this study was to enable measurement of cartilage formation by a novel biomarker of type II collagen formation. The competitive enzyme-linked immunosorbent assay (ELISA) Pro-C2 was developed and characterized for assessment of the beta splice variant of type II procollagen (PIIBNP). This …

Extracellular Matrix Research, Rheumatology
22. Sep 2014

Type X collagen levels are elevated in serum from human osteoarthritis patients and associated with biomarkers of cartilage degradation and inflammation

BACKGROUND:
Osteoarthritis (OA) is the most common degenerative joint disease, of which the pathogenesis is inadequately understood. Hypertrophy-like changes have been observed as part of the progression of OA. The aim of the study was to develop and characterize a novel biomarker of chondrocytes h…

Osteoarthritis
1. Sep 2014

Alpha C-telopeptide of type I collagen is associated with subchondral bone turnover and predicts progression of joint space narrowing and osteophytes in osteoarthritis

OBJECTIVE:
To evaluate joint tissue remodeling using the urinary collagen biomarkers urinary α-C-telopeptide of type I collagen (α-CTX) and urinary C-telopeptide of type II collagen (CTX-II) and to determine the association of these biomarkers with osteoarthritis (OA) severity, progression, and loc…

Rheumatology, Osteoarthritis
1. Aug 2014

Biomarkers of cartilage and surrounding joint tissue

The identification and clinical demonstration of efficacy and safety of osteo- and chondro-protective drugs are met with certain difficulties. During the last few decades, the pharmaceutical industry has, in the field of rheumatology, experienced disappointments associated with the development of di…

Bone, Rheumatology, Osteoarthritis
6. Jun 2014

ALPHA-CTX is associated with subchondral bone turnover and predicts progression of joint space narrowing and osteophytes in osteoarthritis

OBJECTIVE:
To evaluate joint tissue remodeling, with urinary collagen biomarkers, uALPHA CTX and uCTXII, and their association with osteoarthritis (OA) severity, progression, and localized knee bone turnover.

METHODS:
Participants (N=149) with symptomatic and radiographic knee OA underwent fixe…

Rheumatology
12. Dec 2013

Type VI collagen turnover-related peptides-novel serological biomarkers of muscle mass and anabolic response to loading in young men

BACKROUND:
Immobilization-induced loss of muscle mass is a complex phenomenon with several parallels to sarcopenic and cachectic muscle loss. Muscle is a large organ with a protein turnover that is orders of magnitude larger than most other tissues. Thus, we hypothesize that muscle loss and regain …

Rheumatology, Osteoarthritis
24. Apr 2013

The development and characterization of a competitive ELISA for measuring active ADAMTS-4 in a bovine cartilage ex vivo model

ADAMTS-4 (aggrecanase1) is believed to play an important role in the degradation of aggrecan during the progression of joint diseases. ADAMTS-4 is synthesized as a latent pro-enzyme that requires the removal of the pro-domain, exposing the N-terminal neoepitope, to achieve activity. We developed a m…

Hepatic System, Alcoholic Liver Disease
16. May 2012

Enzyme-linked immunosorbent serum assay specific for the 7S domain of Collagen Type IV (P4NP 7S): A marker related to the extracellular matrix remodeling during liver fibrogenesis

AIM:
The present study describes the ability of a newly developed N-terminal pro-peptides of type IV collagen 7S domain (P4NP 7S) competitive enzyme-linked immunosorbent assay (ELISA) for describing liver fibrosis. The assay applies a monoclonal antibody specific for a PIVNP 7S epitope 100% homolog…

Hepatic System, Alcoholic Liver Disease
16. Oct 2011

A novel marker for assessment of liver matrix remodeling: an enzyme-linked immunosorbent assay (ELISA) detecting a MMP generated type I collagen neo-epitope (C1M)

A competitive enzyme-linked immunosorbent assay (ELISA) for detection of a type I collagen fragment generated by matrix metalloproteinases (MMP) -2, -9 and -13, was developed (CO1-764 or C1M). The biomarker was evaluated in two preclinical rat models of liver fibrosis: bile duct ligation (BDL) and c…