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    Defective gene behind rheumatoid arthritis identified

    London, August 17 (ANI): A defective gene, can contribute to the onset of rheumatoid arthritis (RA), a new study has shown.

    In their study, researchers from VIB (Flanders Institute for Biotechnology) and Ghent University demonstrated that a cell-specific defect in the expression of the A20 gene could contribute to the development of rheumatoid arthritis in mice, thereby identifying A20 as a possible target for the generation of new drugs.

    A20 is a protein, which plays a key role in the generation of the inflammatory response.

    VIB researchers led by Geert van Loo and Rudi Beyaert at Ghent University have developed mice with myeloid cells incapable of producing A20.

    In collaboration with Dirk Elewaut, rheumatologist at Ghent University Hospital (Ghent University), who co-supervised the research, they found that these mice had elevated levels of pro-inflammatory cytokines in their blood and joints, and spontaneously developed RA with severe inflammation and osteoporosis.

    Interestingly, the arthritis in this mouse model was not dependent on TNF, a cytokine that normally plays an essential role in many inflammatory diseases including RA.

    The study confirms the crucial role of A20 in the control of inflammatory responses and shows that a defect in A20 in myeloid cells can give rise to RA that is not responsive to anti-TNF treatment.

    From a therapeutic perspective, this is a very important finding, since anti-TNF therapy fails in 30 percent of RA patients.

    The study has been published in Nature Genetics. (ANI)

     

    5 comments

    • sm  •  9 months ago
      So glad RA can be explained and now can be better predicted, which means treated early, which means maybe preventing it for years.
      This is exciting.
      • sm 9 months ago
        *better explained
    • droog  •  9 months ago
      I had my first RA symptoms at 45. Woke up one morning and couldn't reach up to turn the bedside light on. {I'm a former Capt of 2 sports college athlete and was a Cat 2 bicycle racer at the time.} It took me 15 minites to get dressed. Five minites to get in and out of the car. I lost fifteen pounds. I was out of work for six weeks. The first "flare" lasted six months. They gave me all the "weaker" drugs to try....not the methotrexate or any DMARDS. The first "flare" I had alot of pain but no real swelling to speak of. I was in "remission" for ten years. Three years ago I had a bad bicycle accident. I broke my leg, dislocated my shoulder, etc. I also had my second "flare" of RA the same time I was trying to recover from the accident. This time I not only had the debilitating pain but alot of swelling too. I was on oxycodone at the time. I was prescribed quite a bit of oxycodone because of my severely broken leg and bad shoulder separation {initially} and what I did was I saved up alot of the oxycodone from the first month so I could take 5 mg a day for 3 or 4 months. Believe it or not this small amount helped me alot. At least at night I could sit and watch tv and not be miserable for a couple hours. The second "flare" lasted about 10 months. With the second "flare" I not only had the pain but the swelling. About 8 months after the second flare {maybe 20 months ago} the 3rd "flare" began. I still bicycle indoors on my trainer six days a week. My knees began to swell. Really swell.....not only in the front of my knee but in the back of my knee. I kept on biking though. For months. It started in my left knee and went to my right knee. My knees were as big as a girls softball. I still biked though. {I used to play athletics with broken bones and stuff. My pain threshold is a 15 on a 10 scale.} Then my wrists began to swell. Then my shoulders got so I couldn't sleep on my side. I had to sleep laying flat in my bed. Sometimes it was excruciating simply trying to push myself up from the toilet. The inflammation got so bad I had it in my teeth. I'm not kidding you. You think I'm kidding but I'm not. I could FEEL the inflammation in my body like something from the exorcist.. It was palpable, like a demon. Life was torture. This went on for months...THEN I got the malaise. Here I am with pain and swelling which was indescribable {I NEVER slept more than 1 1/2 hours in a stretch} and I get the MALAISE. What's the MALAISE? I'll tell you what it is. Here you are in so much pain that your teeth and gums are inflamed, your hips, shoulders, wrists, knees, are all swollen and to add more to this equation all of a sudden you feel like puke. That is the only way I can describe it. 24 hours a day you feel like you've got the worst Sunday morning hangover you've ever had in your life. You feel like a piece of pizza which has been sitting on the back floor of your car for two months {which you find on a 95 degree July day.} This is how I felt. Here I am a former two sport college athlete {Capt of both sports} a guy who used to play with broken bones and sprained ankles and hematoma's of the thigh and dislocated fingers...how did I feel? I used to stand in front of my bathroom mirror at night and cry and pray that I wouldn't wake up in the morning. Beg the good lord to not allow me to awaken from my {one hour at a time} sleep. Like a little baby.....and the thing is no one understands. "Have you tried glucosomine?" {Yeah. Tried it 20 years ago dude.} "What do you think might help?" {Got any heroin on ya?} "Ya. Geez. I know what ya mean. My knee has been bothering me for a week. That arthritis is difficult." {Sure is. My left knee is as big as a volleyball.}
      Finally I took some methotrexate which I'd been avoiding like the plague but about three months after starting it I developed a cough and some trouble breathing issues and stopped it...I've been in remission for awhile, but I won't go back. Bad RA is a nightmare. An absolute horror.
    • Katie  •  9 months ago
      A cure for arthritis would be a major, major breakthrough! I have tried the DMARD injectible drugs. Enbrel took away all my symptoms and was like a cure. However, after three months, I started having a serious reaction on the injection sites. I am now on Humira, which has not done much. Before that, I was on methotrexate with the Enbrel. Who knows what all of this will do to me too.
      My arthritis came kind of out of the blue and had me bedridden for four months. I am thinking a virus set it off. Hope this new discovery will help us millions of victims.
      • Janice B 9 months ago
        I,m about to start down the road on injectable meds. I,m afraid of the process,but the pain continues to mount.Came on over night and I,ve been fighting it since January2011 Humira is what the good Dr has to offer.Mine may have been set off by stress over work w/Holidays and a wedding.A cure for all who suffer this would be a miracle.
    • contessakitty  •  9 months ago
      I have RA so any news that can be tied to the cause is great news! Fantastic news would be a cure but in order to cure, they have to learn more about the cause.
      • cherylann 9 months ago
        So agree - I was just diagnosed in May - the more research the better - let's find a cure!!
    • RoxyMurf87  •  9 months ago
      Now lets find a cure..................