Related Experiment Video

Updated: Aug 10, 2026

Development of Recombinant Proteins to Treat Chronic Pain
10:37

Development of Recombinant Proteins to Treat Chronic Pain

Published on: April 11, 2018

Inhibition of cartilage destruction by double gene transfer of IL-1Ra and IL-10 involves the activin pathway

E Neumann1, M Judex, F Kullmann

  • 1Department of Internal Medicine I, University of Regensburg, Germany.

Gene Therapy
|October 31, 2002
PubMed

Insights

Double gene transfer of interleukin-1 receptor antagonist (IL-1Ra) and viral IL-10 (vIL-10) effectively inhibited rheumatoid arthritis (RA) fibroblast cartilage degradation. This approach modulates the activin pathway, offering a potential therapy for RA joint erosion.

Area of Science:

  • Immunology
  • Gene Therapy
  • Rheumatology

Background:

  • Rheumatoid arthritis (RA) involves synovial fibroblast activation leading to cartilage degradation.
  • Interleukin-1 receptor antagonist (IL-1Ra) and viral IL-10 (vIL-10) are key anti-inflammatory and cartilage-protective cytokines.
  • Developing effective gene therapies for RA remains a critical challenge.

Purpose of the Study:

  • To investigate the efficacy of combined IL-1Ra and vIL-10 gene transfer into RA synovial fibroblasts.
  • To elucidate the molecular mechanisms underlying the effects of this double gene transfer in a SCID mouse model.
  • To assess the impact on cartilage erosion in RA.

Main Methods:

  • Retroviral and adenoviral vectors were used for gene transfer of IL-1Ra and vIL-10 into human RA synovial fibroblasts.
  • SCID mice were engrafted with transduced fibroblasts and normal cartilage to model RA cartilage erosion.
  • Gene expression analysis (RNA arbitrarily primed PCR and cDNA array) was performed before and after gene transfer.

Main Results:

  • Combined IL-1Ra and vIL-10 gene transfer significantly inhibited cartilage invasion and degradation by RA synovial fibroblasts.
  • Compared to controls, implants with double gene transfer showed reduced cartilage damage.
  • Gene expression analysis revealed that the activin pathway was modulated by the double gene transfer.

Conclusions:

  • Virus-based gene transfer of IL-1Ra and vIL-10 is a feasible strategy to inhibit RA fibroblast-mediated cartilage degradation.
  • The therapeutic effects involve the modulation of the activin pathway.
  • This combined gene therapy approach holds promise for treating RA joint destruction.

More Related Videos

An Ex Vivo Tissue Culture Model of Cartilage Remodeling in Bovine Knee Explants07:10

An Ex Vivo Tissue Culture Model of Cartilage Remodeling in Bovine Knee Explants

Published on: November 3, 2019

Creation of a Knee Joint-on-a-Chip for Modeling Joint Diseases and Testing Drugs12:44

Creation of a Knee Joint-on-a-Chip for Modeling Joint Diseases and Testing Drugs

Published on: January 27, 2023

Related Concept Videos

Hedgehog Signaling Pathway02:33

Hedgehog Signaling Pathway

The Hedgehog gene (Hh) was first discovered due to its control of the growth of disorganized, hair-like bristles phenotype in Drosophila, much like hedgehog spines. Hh plays a crucial role in the development of organs and the maintenance of homeostasis in both invertebrates and vertebrates. However, while Drosophila has only one Hh protein, mammals have multiple functional Hedgehog proteins - Sonic (Shh), Desert (Dhh), and Indian Hedgehog (Ihh). All of these homologous proteins have adapted to...
Growth of Cartilage and Bone Tissue01:27

Growth of Cartilage and Bone Tissue

Chondrocytes form a temporary cartilaginous model by dividing and secreting a thick gel-like extracellular matrix. Once the chondrocytes undergo programmed cell death, osteoblasts enter the site of the cartilaginous model. The process of replacing the temporary cartilaginous model with bone in an ordered manner is called endochondral ossification. In endochondral ossification, not all of the cartilage is replaced by bone tissue. Some cartilage that performs a protective and supportive function...
TGF - β Signaling Pathway01:16

TGF - β Signaling Pathway

The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors are of three kinds RI, RII, and RIII. The RI...
Bone Remodeling and Repair01:31

Bone Remodeling and Repair

Osteoclasts are cells responsible for bone resorption and remodeling. They originate from hematopoietic progenitor cells present in the bone marrow. Numerous progenitor cells fuse to form multinucleated cells, each with 10-20 nuclei. A single osteoclast has a diameter of 150 to 200 µM. These cells have ruffled borders that break down the underlying bone tissue and release minerals such as calcium into the blood in bone resorption. Osteoclasts cling to bones with their ruffled edges during bone...
Bone Formation by Endochondral Ossification01:24

Bone Formation by Endochondral Ossification

Bone formation, or ossification, begins around the sixth to seventh week of embryonic development. Most bones develop from a cartilaginous template through the process of endochondral ossification. Cartilage formation begins when clusters of mesenchymal cells differentiate into chondrocytes. These chondrocytes proliferate rapidly and secrete an extracellular matrix that becomes encased in a membrane called the perichondrium. The resulting cartilage model provides a template that resembles the...
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.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...