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  • Methotrexate not an...

Methotrexate not an additional risk factor for interstitial lung diseases in RA

Written By : Hina Zahid |Medically Reviewed By : Dr. Kamal Kant Kohli Published On 2020-07-08T18:00:05+05:30  |  Updated On 8 July 2020 7:48 PM IST
Methotrexate not an additional risk factor for interstitial lung diseases in RA
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Researchers have found in two new studies that Methotrexate does not appear to be an additional risk factor for chronic interstitial lung diseases in rheumatoid arthritis (RA) patients. Immunosuppressant treatment does not confirm negative effects on lung conditions in patients of rheumatoid arthritis.

Interstitial lung diseases (ILDs) are a common and serious consequence of rheumatoid arthritis (RA). The prevalence varies depending on population and diagnostic method, but at least 5 to 10 percent of all RA patients suffer from this condition, which leads to inflammatory changes in lung tissue and pulmonary alveoli.

It is accompanied by a dry cough and breathing difficulties. A severe course may lead to scarring of lung tissue, which is referred to as lung fibrosis. This may lead to a life-long dependency on oxygen supply or even a lung transplant. "In approximately 10 to 20 percent of all RA patients, lung disease is the cause of premature death1", explains EULAR President Professor Dr. med. Iain B. McInnes from The University of Glasgow, Scotland, Great Britain. "Particularly in these times when we are concerned about respiratory infections, the reduction of additional risk factors for lung damage of rheumatoid arthritis patients must be evaluated."

For this reason, rheumatologists welcome the results of two new studies indicating that the immunosuppressant Methotrexate, which can provoke an acute lung condition (acute pneumonitis), does not appear to be an additional risk factor for chronic interstitial lung diseases in RA patients. In previous years, it was suspected that this immunosuppressant may increase the risk for RA-associated chronic ILD.

"RA patients have a higher risk of suffering from interstitial lung disease than the general population. However, based on our large dataset, there is no evidential correlation to the treatment with Methotrexate," explains Professor Dr. Lene Dreyer from Aalborg University in Denmark, summarising the results of her current cohort study. Dr. Dreyer's research refers to patient data from the Danish National patient registry as well as the DANBIO registry for rheumatic conditions. In cooperation with the team of researcher Else Helene Ibfelt from the Steno Diabetes Center Copenhagen, Denmark, she examined a total of 30,512 RA patients registered there between 1997 and 2015 for ILD and breathing conditions, taking into account their respective medication.

A current case control study also examining the connection between treatment with MTX and lung diseases in France came to the same conclusion. "In a total of 1,223 RA patients, we were not only able to show that MTX has no impact on the development of interstitial lung diseases but, in fact, may contribute to delaying this development," summarises the author Dr. Pierre-Antoine Juge from Bichat-Claude Bernard Hospital in Paris, France. The number of RA patients affected by ILD therapy was reduced by more than half in comparison with RA patients not receiving any MTX treatment."

"Of course, further examinations are required to support the results and assure patients and physicians that treatment with MTX does not have any negative impact on the pulmonary health of patients suffering from rheumatoid arthritis," explains Professor Dr. John Isaacs, EULAR Scientific Chair, The University of Newcastle, Great Britain. Currently there are very few effective treatments for interstitial lung disease, increasing the importance of these results, which may even suggest methotrexate as a potential therapy. But, notwithstanding these data in relation to RA-associated ILD, it remains important to remember that MTX can cause an acute pneumonitis.

Due to the still existing general risk for ILD, experts recommend examining RA patients regularly for any pulmonary changes to enable timely treatment-particularly in times of the COVID-19 pandemic. In case of any suspicion of ILD, the degree of reduction in pulmonary function can be determined by means of functional examinations of the lung. ILD can also be diagnosed by means of medical imaging such as computer tomography or bronchoscopy.

For further reference log on to:

https://www.eular.org/index.cfm

rheumatoid arthritismethotrexateInterstitial lung diseasesuniversity of glasgow
Source : European League Against Rheumatism (EULAR 2020)
Hina Zahid
Hina Zahid

    Hina Zahid Joined Medical Dialogue in 2017 with a passion to work as a Reporter. She coordinates with various national and international journals and association and covers all the stories related to Medical guidelines, Medical Journals, rare medical surgeries as well as all the updates in the medical field. Email: editorial@medicaldialogues.in. Contact no. 011-43720751

    Dr. Kamal Kant Kohli
    Dr. Kamal Kant Kohli

    Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751

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