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  • Doxycycline Use for Arthritis in the TMJ's

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    Old 11-28-2005, 08:46 PM   #1
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    CherylL24 HB UserCherylL24 HB UserCherylL24 HB User
    Lightbulb Doxycycline Use for Arthritis in the TMJ's

    I thought some with arthritis in the TMJ's may find this case study interesting.

    The potential role of doxycycline in the treatment of osteoarthritis of the temporomandibular joint.

    Israel HA, Ramamurthy NS, Greenwald R, Golub L.

    Columbia University, New York, New York, USA.

    Collagenase and gelatinase are matrix metalloproteinases (MMPs) which play an important role in tissue destruction in arthritic joints. Studies have demonstrated that tetracyclines can inhibit MMPs and prevent tissue destruction independent of their antimicrobial activity. The purpose of this pilot study is to assess the potential therapeutic role of Doxycycline in patients with advanced osteoarthritis of the temporomandibular joint (TMJ). This ongoing investigation includes patients with a diagnosis of osteoarthritis of the TMJ based on clinical and diagnostic imaging findings, symptoms (localized TMJ pain, limited mobility, dysfunction) for a minimum of 36 months, and failure of previous non-surgical and surgical modalities to alleviate the symptoms. A synovial fluid sample is collected by a saline injection and aspiration technique, followed by diagnostic arthroscopy. Patients are placed on Doxycycline 50 mg BID for three months and then undergo repeat diagnostic arthroscopy and synovial fluid collection. The samples are stored at -80 degrees C. Collagenase activity is determined by a combination of SDS-polyacrylamide gel electrophoresis and fluorography and calculated based on the percentage of collagen alpha chains that are degraded into alphaA breakdown products. Three patients have completed the three-month course of Doxycycline thus far, and 5 joints with osteoarthritis have been analyzed. All patients were female (mean age = 35, mean duration of symptoms = 132 months) and had undergone previous bilateral arthroscopies. One patient had undergone unilateral arthroplasty. The mean collagenase activity showed 55% collagen lysis prior to Doxycycline treatment and 19% after three months of therapy. The mean gelatinase activity was 28% prior to Doxycycline treatment and 7% after three months of therapy. The mean interincisal opening was 33 mm initially and 41 mm after three months of Doxycycline. Subjectively, two of the three patients reported significant improvement in their overall symptoms, which they had not experienced over the previous three years. One patient did not experience any change in symptoms, in spite of a marked reduction in collagenase activity from 86.4% to 9.6%. Because of the very small numbers of patients enrolled in this pilot study so far, no statistically significant differences could be appreciated. However, the dramatic reduction in collagenase activity in these patients, with a long history of TMJ symptoms from osteoarthritis, suggests the potential promising role of Doxycycline in the management of osteoarthritis, and further investigation is warranted.

    PMID: 9972122 [PubMed - indexed for MEDLINE]
    [url] ids=9972122&dopt=Abstract[/url]

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    Old 11-29-2005, 07:12 AM   #2
    Join Date: May 2005
    Location: Upstate NY
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    raylp HB User
    Re: Doxycycline Use for Arthritis in the TMJ's

    I read that a pilot study was done recently on knees as well. Apparently injecting the doxy into the knee helped alot with arthritis. It isn't FDA approved yet though.

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