A low cartilage formation and repair endotype predicts radiographic progression of symptomatic knee osteoarthritis

What Was Tested

This randomized controlled trial paper looks at Calcitonin in the context of osteoarthritis, cartilage loss & avoiding joint replacement.

The aim of this study is to examine the associations of level of cartilage formation with OA severity and radiographic OA progression.

The researchers used the blood-based marker PRO-C2, reflecting type II collagen formation, to assess levels of cartilage formation.

Why It Was Studied

Osteoarthritis (OA) is a disease with multiple endotypes.

A hallmark of OA is loss of cartilage; however, it is evident that the rate of cartilage loss differs among patients, which may partly be attributed to differential capacity for cartilage repair.

Who Took Part

PubMed indexes the participants as middle-aged adults and older adults, both men and women.

The type II collagen propeptide PRO-C2 was measured in the serum/plasma of knee OA subjects from New York University (NYU, n = 106) and a subcohort of the phase III oral salmon calcitonin (sCT) trial SMC021-2301 (SMC, n = 147).

How the Study Was Run

The design is described as randomized.

Because people in this Calcitonin study were split into groups at random, differences between the groups are less likely to reflect who happened to join each one.

The timeline in the abstract includes 24 months.

Risk of radiographic medial joint space narrowing (JSN) over 24 months was compared between quartiles (very low, low, moderate, and high) of PRO-C2.

Associations were adjusted for age, gender, BMI, race, baseline pain levels, and baseline joint space width.

What Was Measured

Level III post hoc exploratory analysis of one longitudinal cohort and a sub-study from one phase III clinical trial.

The subject headings attached to it are Biomarkers, Bone Density Conservation Agents, Calcitonin, Calcium-Binding Proteins, Cartilage, Articular, Chondrogenesis and Cohort Studies.

The authors tagged it with the keywords Cartilage biomarker, Extracellular matrix, Joint space narrowing, Knee osteoarthritis and Matrix synthesis.

What This Means in Plain Language

The paper is a randomized study of Calcitonin in people with osteoarthritis, cartilage loss & avoiding joint replacement over 24 months.

Its findings take up roughly 5 sentences of the abstract and are left out here on purpose; the source paper is the place to read them.

The publication is from 2021 (Journal of orthopaedics and traumatology : official journal of the Italian Society of Orthopaedics and Traumatology), a journal based in Italy.

More context: the Calcitonin compound page, Osteoarthritis, cartilage loss & avoiding joint replacement research.