Gene Therapy Could Prevent Arthritis

By Lisa Raffensperger | March 13, 2013 1:22 pm

Most people who live to old age will suffer from arthritis. The condition’s prevalence is growing alongside a graying world population.

However the only treatments at the moment address the symptoms rather than the cause—the loss of cartilage in joints. Joint replacement is a last-ditch solution for some sufferers. Now a gene therapy approach has demonstrated promise in staving off arthritis in mice, opening the door to human testing.

The inspiration for the research came from studying children with a genetic form of arthritis that strikes early. These children are deficient in the gene for a protein called lubricin. Lubricin is thought to act as a lubricant between the bones in a joint.

Since a lack of lubricin caused arthritis, researchers thought perhaps additional lubricin could stave it off.

They tested this hypothesis by creating a strain of mice with an additional lubricin gene in their DNA. When these mice suffered an injury to their knees they didn’t develop injury-induced arthritis. Inspection of the mice’s joints found that their cartilage resembled mice who’d never been injured in the first place. Non-modified mice, on the other hand, had symptoms of arthritis just a month after injury.

What’s more, as the mice that made extra lubricin aged, their cartilage stayed youthful. That suggests the protein may protect against both common forms of arthritis: injury-related and age-related.

The treatment also works if the replacement genes are injected right into the joint itself, the researchers report in Science Translational Medicine today. Its delivery to human patients, then, could be similar to the injection of joint lubricants that some arthritis sufferers currently rely on.

However no gene therapies are currently approved by the FDA for human treatment, so this research will likely stay in the lab for some time yet.

And, importantly, the gene therapy just staves off cartilage loss; it doesn’t regenerate lost cartilage. But the treatment could be a promising option for preventing the onset of arthritis in early stages of the disease or after injury.

Image courtesy OneSmallSquare / Shutterstock

CATEGORIZED UNDER: Health & Medicine, top posts
MORE ABOUT: arthritis, gene therapy
  • Guest

    gene therapy is mean that inject a certain gene from mouse that can produce lubricants to our human body?? if like that, it will be rejected by our body or not?

  • chang kek ning I12001777

    gene therapy is mean that inject a certain gene from mouse that can produce lubricants to our human body?? if like that, it will be rejected by our body or not?

  • http://www.facebook.com/mendy8i8 Mendy Hartsook

    I hope collagen genes are next!

  • http://www.facebook.com/profile.php?id=1468472758 Carol McCormack Stone

    Just start taking glucosamine/condroitan and calcium/magnesium/D/zinc at an early age for prevention.

  • Lucell Hanson

    Unfortunately, someone has died from the Gene Therapy. Back in 2007 a woman received a total of two injections. 22 days after her first injection, she passed away.

    http://www.medpagetoday.com/Rheumatology/Arthritis/15007

  • http://www.jeetchowhan.com/ Jeet Chowhan

    Gene therapy
    manipulates the genetic code specific to every individual (all unique – no
    two person’s DNA is exactly the same – twins have very, very similar, but not
    identical, DNA). Genetic disorders are almost always traced back to a fault
    at the chromosomal level, and sometime even deeper at the nucleotide level.
    By manipulating the DNA nucleotide we can change the structure of the
    associated protein of that particular disorder. By changing the protein,
    we can either make the disorder easier to manage or get rid of it completely.

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