An 18-Month, Randomized, and Double-Blind Trial
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Hindawi Publishing Corporation Evidence-Based Complementary and Alternative Medicine Volume 2014, Article ID 857456, 9 pages http://dx.doi.org/10.1155/2014/857456 Research Article Treatment of Rheumatoid Arthritis with Marine and Botanical Oils: An 18-Month, Randomized, and Double-Blind Trial George W. Reed,1 Katherine Leung,1 Ronald G. Rossetti,2 Susan VanBuskirk,3 John T. Sharp,4 and Robert B. Zurier5 1 University of Massachusetts Medical School, Department of Medicine, Division of Preventive and Behavioral Medicine, 55 Lake Avenue North, Shaw Building, Worcester, MA 01655, USA 2 University of Massachusetts Medical School, Department of Medicine, Rheumatology Division, 55 Lake Avenue North, LRB 240, Worcester, MA 01655, USA 3 University of Massachusetts Medical School, Department of Family Medicine and Community Health, 55 Lake Avenue North, Benedict Building A3-214, Worcester, MA 01655, USA 4 University of Washington School of Medicine, Bainbridge Island, Seattle, WA, USA 5 University of Massachusetts Medical School, Department of Medicine, Rheumatology Division, 55 Lake Avenue North, LRB 840D, Worcester, MA 01655, USA Correspondence should be addressed to Robert B. Zurier; [email protected] Received 8 November 2013; Accepted 10 February 2014; Published 19 March 2014 Academic Editor: JoseLuisR´ ´ıos Copyright © 2014 George W. Reed et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Objective. To determine whether a combination of borage seed oil rich in gamma linolenic acid (GLA) and fish oil rich in eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) is superior to either oil alone for treatment of rheumatoid arthritis (RA). Methods. Patients were randomized into a double-blind, 18-month trial. Mixed effects models compared trends over time in disease activity measures. Results. No significant differences were observed in changes in disease activity among the three randomized groups. Each group exhibited significant reductions in disease activity (DAS28) at 9 months (fish: −1.56[−2.16, −0.96], borage: −1.33[−1.83, −0.84], combined: −1.18[−1.83, −0.54]) and in CDAI (fish: −16.95[−19.91, −13.98], borage: −11.20[−14.21, −8.19], and combined: −10.31[−13.61, −7.01]). There were no significant differences in change of RA medications among the three groups. Reduced disease activity in study patients was similar to matched patients from an RA registry, and reduction in DMARD use was greater ( < 0.03)instudypatients.Conclusion. All 3 treatment groups exhibited similar meaningful clinical responses after 9 months, improvements which persisted for 18 months, and a response similar to matched patients from an RA registry. Study patients were able to reduce DMARD therapy given in combination with TNF antagonists to a greater extent than registry patients. This paper is dedicated to the memory of Dr. John T. Sharp, M.D., a pioneer and innovator in the field of musculoskeletal radiology. 1. Introduction inflammation, and joint tissue injury6 [ ], may therefore be amenable to control by treatment with oils rich in particular Abundant experimental evidence supports the view that polyunsaturated fatty acids. eicosanoids participate in development and regulation of Gamma linolenic acid (GLA: 18 : 3 omega 6) is an essen- immunological and inflammatory responses [1–4]. Because tial fatty acid found in borage seed oil. GLA is metabolized essential fatty acids are precursors to eicosanoids and are to dihomogamma linolenic acid (DGLA; 20 : 3 omega 6), important determinants of cell function, they influence the immediate precursor of prostaglandin E1 (PGE1), an immune responses [5]. A disease such as rheumatoid arthri- eicosanoid with anti-inflammatory and immunoregulatory tis (RA), characterized by abnormal immune responses, properties [7]. In addition, GLA cannot be converted to 2 Evidence-Based Complementary and Alternative Medicine inflammatory leukotrienes by 5-lipoxygenase. Instead, it is >28 mm/hr or morning stiffness of at least 45 min. Patients converted to 15-hydroxy DGLA, which has the virtue of were on a stable dose of disease modifying antirheumatic suppressing 5-lipoxygenase activity [8]. GLA and DGLA drugs (DMARDs) and/or biologic agents for at least 2 months also modulate immune responses in an eicosanoid indepen- before the screening visit, with a total duration of therapy dent manner by acting directly on T lymphocytes [9], and of at least 6 months. An NSAID dose (with or without GLA suppresses acute and chronic inflammation, including othertreatment)wasstableforatleastonemonthbefore arthritis, in animal models [10]. More importantly, in several screening, and a prednisone (or equivalent corticosteroid) randomized, placebo-controlled trials in RA patients, GLA in dose ≤10 mg/d was stable for at least one month before borage or primrose seed oils reduced synovitis and the need screening. for nonsteroidal anti-inflammatory agents [11–13]. Patients were ineligible for the study if they had been Fish oil, rich in eicosapentaenoic acid (EPA; 20 : 5 omega treated with investigational drugs within one month of entry. 3) and docosahexaenoic acid (DHA; 22 : 6 omega-3), sup- If a patient was taking a fish oil or borage oil supplement, presses formation of the inflammatory eicosanoids PGE2, the dose was stable and ≤2000 mg/d for each supplement for thromboxane A2 (TXA2), and leukotriene B4 (LTB4). The 2 months before screening. An intra-articular corticosteroid LTB5 which is produced is a far less potent mediator injection within 6 months of screening excluded that joint than LTB4. Each of 12 randomized, placebo-controlled, and from evaluation until 6 months after injection. An aspartate double-blind trials of fish oil in RA documents clinical transaminase (AST) or alanine transaminase (ALT), or crea- improvement, including reductions in duration of morning tinine > 1.5 times upper limit of normal, or a total bilirubin > stiffness, number of tender joints, joint pain, time to fatigue, 1.8 mg/dL excluded patients. and increased grip strength. Those studies that monitored NSAID use suggest that fish oil treatment has an NSAID sparing effect [14, 15]. 4. Treatment A combination of EPA and GLA enriched oils exhibits Patients were randomized to receive either 6 borage seed synergy in reduction of synovitis in animal models [16], oil(1.8gmGLA)capsulesplus7sunflowerseedoilcapsules and treatment of RA patients with black currant seed oil, daily, or 7 fish oil (2.1 gm EPA/1.4 gm DHA) capsules and 6 which contains both the n-3 fatty acid alpha linolenic acid sunflower seed oil capsules daily, or 6 borage seed oil capsules (converts to EPA) and the n-6 GLA, suppresses synovitis in plus 7 fish oil capsules daily. All capsules were identical in these patients [17]. These results suggest that a combination appearance and color and were purchased from Bioriginal ofGLAandEPAmaybeamoreusefultherapyforRAthan Food and Service Corp., Saskatoon, Canada, who shipped the each fatty acid alone. Therefore, we carried out a phase 3 trial capsules in coded opaque plastic bottles to the University of of borage seed oil, fish oil, and a combination of the two oils in Massachusetts University Hospital Pharmacy, from whence patients with RA and active synovitis, to determine whether they were distributed to participating centers. Capsules were the combination is superior to treatment with either oil alone. taken in 2 or 3 divided doses with meals. 2. Study Design 5. Clinical Assessment The study was an 18-month randomized, double-blind com- Each individual patient was evaluated by the same examiner parison of borage seed oil, fish oil, and the combination at each visit. The 4-value modified disease activity score using of both oils in RA patients with synovitis. Patients were ESR (DAS 28) was the primary outcome measure. evaluated at 3-month intervals. The protocol was reviewed The DAS 28 has been validated [20] and is as represen- and approved by the Committee for the Protection of Human tative of change in disease status as the ACR criteria [21]. A Subjects in Research at the University of Massachusetts validated [22] Clinical Disease Activity Index (CDAI), omit- Medical School and by the Food and Drug Administration. ting acute phase reactants, was also used. The CDAI is valid Subsequent approvals were obtained from Review Boards at for assessment of RA activity and treatment response [23]. theUniversityofAlabama,GeisingerClinic,FallonHealth Patients were evaluated at baseline and 3-month intervals. Care, and the New England IRB. Written informed consent Patients were instructed to maintain their typical diet. was obtained from each patient. Dietary 24 hr recalls were collected at baseline and 18 months, or the terminal visit. 3. Eligibility 6. Evaluation of Radiographs Patients were eligible to participate in the study if they had RA according to the 1987 criteria of the American Rheumatism Radiographs of hands and feet were obtained at baseline and Association [18], were in functional class I, II, or III according 18 months, or early exit, unless the patient exited before 12 to the revised criteria of the American College of Rheuma- months. All available radiographs were scored for erosions tology [19], and were between the ages of 18 and 85. Patients (scale 0–5) and joint space narrowing (0–4) by Dr. John T had active disease as manifest by at least 3 swollen joints Sharp. Erosion and narrowing scores were summed to estab- and 6 tender joints at the time of enrollment. In addition, lish a total score. Radiographs were evaluated in patient sets patientshadanerythrocytesedimentationrate(ESR)of without knowledge of the order taken or treatment received Evidence-Based Complementary and Alternative Medicine 3 Recruited: 156 Randomized: 150 Borage Combination Fish group: group: 52 group: 45 53 Dropped: Dropped: 23 28 Dropped: 25 Borage group: Combination Fish group: 24 group: 22 28 Reason dropped Frequency (%) GI upsets 20 26.32 Capsules too large/too many 16 21.05 Lack of efficacy 7 9.21 Other 33 43.42 Total 76 100 65 subjects out of 76 dropped before 9 months.