Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

The promise of a tetracycline antibiotic for treating osteoarthritis

30.06.2005


Study shows effectiveness of doxycycline in slowing disease progression



A tetracycline antibiotic, doxycycline, has been successfully used to treat a wide-range of bacterial infections. In addition to its effects as an antibiotic, doxycycline has other actions as a drug and, in laboratory studies with animals and with human tissue, can inhibit the degradation of cartilage in a way that could be useful for the treatment of osteoarthritis (OA). OA is a common form of arthritis associated with pain and disability related to the breakdown of cartilage, the tissue in the joint that absorbs shock and promotes smooth movement.

On the strength of preclinical evidence, a team of rheumatologists affiliated with six clinical research centers across the United States conducted the first long-term clinical trial to determine the benefits of doxycycline in the treatment of OA--particularly, OA of the knee. Their findings, featured in the July 2005 issue of Arthritis & Rheumatism (http://www.interscience.wiley.com/journal/arthritis), suggest that doxycycline may slow the progression of joint damage and point to the need for further research into the drug’s effect on the signs and symptoms of this disease.


For the trial, the team recruited 431 overweight women between the ages of 45 and 64 with moderately advanced OA in one knee. The subjects were randomly assigned to receive either 100 milligrams of doxycycline or a placebo twice a day for 30 months. At baseline, the 2 treatment groups were roughly equal with respect to all demographic variables, body mass index, and types of drugs taken for pain, as well as for the x-ray severity of OA in the affected knee and the level of knee pain and functional impairment. OA progression was assessed by measuring joint space narrowing in the medial tibiofemoral compartment through X-rays obtained at baseline, 16 months and 30 months. Severity of joint pain was assessed every 6 months after a washout period of all nonsteroidal anti-inflammatory drugs (NSAIDs) and analgesics.

71 percent of the subjects completed the treatment protocol. Radiographs were obtained from 85 percent of all subjects at 30 months. After 16 months of treatment, the mean loss of joint space width in the diseased knee in the doxycycline group was 40 percent less than in the placebo group. After 30 months, it was 33 percent less. Yet, despite significantly slowing disease progression, doxycycline did not reduce the severity of joint pain. However, mean pain scores at baseline were low in both treatment groups, leaving only limited opportunity to demonstrate improvement in joint pain. On the other hand, the drug significantly reduced the frequency with which subjects reported increases in knee pain 20 percent or greater than the level of pain they had at their previous semi-annual visit.

Notably, doxycycline seemed to have no effect on joint space narrowing or pain in the relatively disease-free knee. In both knees in both treatment groups, the rate of joint space narrowing was more than twice as rapid in subjects who reported frequent increases in pain than in those with a stable pain score. "Joint pain may serve as an indicator of synovitis that leads to cartilage destruction," observes the study’s leading author, Kenneth D. Brandt, M.D.

Throughout the trial, fewer than 5 percent of all subjects reported side effects. In general, doxycycline seemed to be well tolerated. Subjects in the active treatment group experienced the unexpected side benefits of fewer urinary tract and upper respiratory tract infections than their placebo counterparts.

In conclusion, in this study, doxcycyline showed benefits in slowing the rate of joint space narrowing in knees with established OA. Whether this drug has any value in the early treatment and symptomatic management of OA, however, will require further investigation.

Amy Molnar | EurekAlert!
Further information:
http://www.interscience.wiley.com/journal/arthritis

More articles from Studies and Analyses:

nachricht Antarctic Ice Sheet mass loss has increased
14.06.2018 | Technische Universität Dresden

nachricht WAKE-UP provides new treatment option for stroke patients | International study led by UKE
17.05.2018 | Universitätsklinikum Hamburg-Eppendorf

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Temperature-controlled fiber-optic light source with liquid core

In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.

Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...

Im Focus: Overdosing on Calcium

Nano crystals impact stem cell fate during bone formation

Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...

Im Focus: AchemAsia 2019 will take place in Shanghai

Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.

Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...

Im Focus: First real-time test of Li-Fi utilization for the industrial Internet of Things

The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.

Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.

Im Focus: Sharp images with flexible fibers

An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.

Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Munich conference on asteroid detection, tracking and defense

13.06.2018 | Event News

2nd International Baltic Earth Conference in Denmark: “The Baltic Sea region in Transition”

08.06.2018 | Event News

ISEKI_Food 2018: Conference with Holistic View of Food Production

05.06.2018 | Event News

 
Latest News

Graphene assembled film shows higher thermal conductivity than graphite film

22.06.2018 | Materials Sciences

Fast rising bedrock below West Antarctica reveals an extremely fluid Earth mantle

22.06.2018 | Earth Sciences

Zebrafish's near 360 degree UV-vision knocks stripes off Google Street View

22.06.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>