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Related Concept Videos

T Cell Types and Functions01:24

T Cell Types and Functions

When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
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The Effect of Aging on Tissues

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Related Experiment Video

Updated: May 26, 2026

Flow Cytometry Analysis of Immune Cell Subsets within the Murine Spleen, Bone Marrow, Lymph Nodes and Synovial Tissue in an Osteoarthritis Model
12:23

Flow Cytometry Analysis of Immune Cell Subsets within the Murine Spleen, Bone Marrow, Lymph Nodes and Synovial Tissue in an Osteoarthritis Model

Published on: April 24, 2020

Interleukin-7 levels in synovial fluid increase with age and MMP-1 levels decrease with progression of

René Rübenhagen1, Jan Philipp Schüttrumpf, Klaus Michael Stürmer

  • 1Department of Trauma Surgery, Plastic and Reconstructive Surgery, Georg-August University, Goettingen, Germany.

Acta Orthopaedica
|December 31, 2011
PubMed
Summary

Interleukin-7 (IL-7) levels in knee osteoarthritis (OA) synovial fluid correlate with age but decrease in severe OA. Matrix metalloproteinase-1 (MMP-1) levels decline with OA severity, suggesting roles in disease progression.

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Synovial Fluid Analysis to Identify Osteoarthritis
07:51

Synovial Fluid Analysis to Identify Osteoarthritis

Published on: October 20, 2022

Related Experiment Videos

Last Updated: May 26, 2026

Flow Cytometry Analysis of Immune Cell Subsets within the Murine Spleen, Bone Marrow, Lymph Nodes and Synovial Tissue in an Osteoarthritis Model
12:23

Flow Cytometry Analysis of Immune Cell Subsets within the Murine Spleen, Bone Marrow, Lymph Nodes and Synovial Tissue in an Osteoarthritis Model

Published on: April 24, 2020

Synovial Fluid Analysis to Identify Osteoarthritis
07:51

Synovial Fluid Analysis to Identify Osteoarthritis

Published on: October 20, 2022

Area of Science:

  • Biochemistry
  • Immunology
  • Orthopedics

Background:

  • Knee osteoarthritis (OA) pathogenesis involves poorly understood biochemical mediators.
  • Cytokines and metalloenzymes are implicated in OA initiation and progression.

Purpose of the Study:

  • To evaluate the roles of specific cytokines and metalloenzymes in knee OA.
  • To correlate mediator levels with OA grade, patient age, and body mass index (BMI).

Main Methods:

  • Multiplex immunoassay (Luminex) measured 19 biochemical mediators in synovial fluid (SF) from 82 knee surgery patients.
  • Patients were categorized by age, BMI, and OA grade; 24 served as controls.

Main Results:

  • Interleukin-7 (IL-7) SF levels correlated positively with age (p < 0.01) but were depressed in severe, three-compartment OA.
  • Matrix metalloproteinase-1 (MMP-1) SF levels showed a negative correlation with OA grade (p < 0.001).
  • Chemokine (MCP-1) and cytokine (IL-1Ra) levels were identified as key mediators in OA progression.

Conclusions:

  • Elevated IL-7 in elderly OA patients may be linked to cartilage status, while decreased levels in severe OA suggest chondrocyte dysfunction.
  • Reduced MMP-1 in severe OA SF may reflect superficial cartilage layer deterioration.
  • Specific mediators like MCP-1 and IL-1Ra are critical in OA progression.