Faculty Bibliography

The coexistence of systemic lupus erythematosus (SLE) and myasthaenia gravis (MG) has been reported previously. Because of their shared clinical characteristics and autoantibody-mediated pathogenesis, an SLE expert panel decided to include MG as one of the 19 neuropsychiatric SLE syndromes. This study reports a cluster of three cases of SLE/MG overlap from our cohort and a review of the published data concerning this overlap of SLE and MG. A systematic Medline review revealed 13 cases described in eight publications from 1994 to 2009. In summary, 12 of the 16 patients (three from our cohort and 13 from the reported cases) were women with an average age of 34 years. The most common SLE manifestations were polyarthritis (15 out of 16 patients), skin rashes (5/16), serositis (5/16), and cytopaenias (10/16). All of the patients were anti-nuclear antibodies (ANA) positive and 15/16 were anti-dsDNA positive. Proximal muscle weakness was the most frequent MG-related symptom (9/16), while 11/16 patients were anti-acetylcholine receptor (anti-AChR) antibody positive and 9/16 had diagnostic electromyography (EMG). These data suggest that MG should to be included in the differential diagnosis of lupus patients with fatigue and muscular weakness together with inflammatory and drug-induced myopathy

Purpose: To analyze whether quantitative scores on a multidimensional health assessment questionnaire (MDHAQ) provide clues to the likelihood of inflammatory versus non-inflammatory symptoms and concomitant fibromyalgia, an important challenge in clinical care, according to a global scale for noninflammatory symptoms completed by a rheumatologist in 50 patients with SLE seen in usual care. Methods: A cross-sectional study was performed in 50 consecutive SLE patients of one rheumatologist seen in usual care. On arrival at the clinic, patients completed a multidimensional health assessment questionnaire (MDHAQ) which includes scales for physical function (FN), 0-10 visual analog scales for pain (PN), global estimate (PTGL) and fatigue (FT), and a review of systems symptom checklist (SX). SLE patients also completed a self-report Systemic Lupus Assessment Questionnaire (SLAQ). The rheumatologist, unaware of MDHAQ and SLAQ scores, recorded a physician global estimate (MDGL) and an estimate of non-inflammatory symptoms, each scored on a 0-3 scale in 0.1 increments, as well as four SLE indices: SLEDAI-2K (SLE Disease Activity Index), BILAG (British Isles Lupus Assessment Group index), SLAM (SLE Activity Measure) with and without laboratory tests, and ECLAM (European Consensus Lupus Activity Measurement). SLE patients with scores of <0.5 on the noninflammatory symptom scale were regarded as low and those with scores >=0.5 high noninflammatory symptoms; the two groups were compared using the Mann-Whitney statistic. Results: The study included 45 women and 5 men, mean age 38.7 years, mean disease duration 7.3 years. Of the 50 patients, 16 had high and 34 low scores for non-inflammatory symptoms. Those with high scores for non-inflammatory symptoms had significantly higher scores for FN, PN, FT, PTGL, SX, SLAQ, and SLAM without laboratory tests, as well as significantly lower CRP. No significant differences were seen patients estimated as high and low scoring patients for SLEDAI, BILAG, SLAM, ECLAM, C3, C4, antiDsDNA, or ESR. Fewer than 50% of low patients had FN, PN, PTGL, or FT >=2, while 100% of high patients had FT >2, and 94% PTGL >2. All patients with high non-inflammatory symptoms (16/16) reported more than 5 SX, compared to 15/34 (44%) low patients, and 12/16 (75%) high patients reported >10 SX, compared to 6/34 (18%) low patients. (Table Presented) Conclusion: High scores for dysfunction, pain, fatigue, global estimates, and number of symptoms are common in SLE patients with high versus low levels of non-inflammatory symptoms. SLE indices do not distinguish between patients with high versus low levels of non-inflammatory symptoms. A simple global scale to estimate non-inflammatory symptoms may be informative in therapeutic decisions, particularly if consistent with patient questionnaire patterns

OBJECTIVE: To study the membrane expression of endothelial protein C receptor (mEPCR) in the renal microvasculature in lupus nephritis (LN) as a potential marker of injury and/or prognostic indicator for response to therapy. METHODS: mEPCR expression was analysed by immunohistochemistry in normal kidney and in 59 biopsies from 49 patients with LN. Clinical parameters were assessed at baseline, 6 months and 1 year. RESULTS: mEPCR was expressed in the medulla, arterial endothelium and cortical peritubular capillaries (PTCs) in all biopsies with LN but not in the cortical PTCs of normal kidney. Positive mEPCR staining in >25% of the PTCs was observed in 16/59 biopsies and associated with poor response to therapy. Eleven (84.6%) of 13 patients with positive staining for mEPCR in >25% of the PTCs and follow-up at 6 months did not respond to therapy, compared with 8/28 (28.6%) with mEPCR staining in < or =25% PTCs, P = 0.0018. At 1 year, 10 (83.3%) of 12 patients with positive mEPCR staining in >25% of the PTCs did not respond to therapy (with two progressing to end-stage renal disease) compared with 8/24 (33.3%) with positive staining in < or =25% of the PTCs, P = 0.0116. Although tubulo-interstitial damage (TID) was always accompanied by mEPCR, this endothelial marker was extensively expressed in the absence of TID suggesting that poor response could not be attributed solely to increased TID. mEPCR expression was independent of International Society of Nephrology/Renal Pathology Society class, activity and chronicity indices. CONCLUSION: Increased mEPCR expression in PTCs may represent a novel marker of poor response to therapy for LN

OBJECTIVE: To evaluate responses to mycophenolate mofetil (MMF) and intravenous cyclophosphamide (CYC) in lupus nephritis in a multiethnic population. METHODS: This was a retrospective study of all patients with systemic lupus erythematosus (SLE) that underwent kidney biopsy at New York University Medical Center. Patients with followup of at least 6 months were included. Clinical response was defined as complete (return to +/- 10% of normal) or partial (improvement of 50% in abnormal renal measurements). RESULTS: Ninty-nine patients were included in the study: 86% females, 86% non-Caucasian, age 34.2 +/- 1.1 years, 62% with proliferative nephritis (PN; ISN/RPS-III and IV), and 32% with membranous nephritis (MN; ISN/RPS-V). Of the 70 patients with PN, 37 were treated with CYC and 33 with MMF. The baseline characteristics of the 2 treatment groups were different in the incidence of ISN/RPS-IV, values of serum creatinine and serum albumin, and type of insurance (p < 0.05). The response rate was greater in the MMF than in the CYC group (70% vs 41%). Responses to MMF were different in Asians (11/11), Caucasians (4/5), African Americans (3/5), and Hispanics (5/11). Responses to CYC had a similar distribution (Asians 6/10, Caucasians 4/5, African Americans 4/9, Hispanics 1/11). In the MN group (N = 23) responses were similar to the PN group (73% MMF and 38% CYC). After adjusting for race, serum creatinine, serum albumin, type of insurance, and class of nephritis, in a logistic regression model, response to MMF was superior to CYC: OR 6.2 (95% CI 1.9-20.2). Hispanics had worse outcome than Caucasians (OR 0.17). Longterm followup suggested no difference in maintenance with MMF or CYC. CONCLUSION: After controlling for the fact that less severe nephritis is preferentially treated with MMF, we found overall that response to MMF was superior to CYC. In this US population, ethnicity was observed to have an influence on response

OBJECTIVE: Individualized therapy based on genetic background and monitoring of metabolites can optimize drug safety and efficacy. Such an approach is available for azathioprine (AZA), the thiopurine antimetabolite. AZA exerts therapeutic effects when metabolized to the active thiopurine nucleotide, 6-thioguanine (6-TGN). In inflammatory bowel disease (IBD), 6-TGN levels in the target range of 235-400 pmol/8x10(8) red blood cells (RBC) are associated with a high likelihood of response. Our objective was to evaluate whether drug escalation based on metabolite levels improves efficacy and maintains safety in patients with systemic lupus erythematosus (SLE). METHODS: We conducted a 6-month open-label dose-escalation clinical study of patients with active SLE treated with azathioprine dosed by body weight and metabolite levels. The primary endpoint was >or=50% improvement in any one parameter of disease activity, or 50% decrease in glucocorticoid dose. RESULTS: Of 50 patients enrolled in the study, 21 achieved clinical responses, 13 of whom had 6-TGN<235 pmol/8 x10(8) RBC. Ten patients had no clinical response at 6 months, yet achieved either therapeutic IBD 6-TGN levels (>235, n=4) or received maximum AZA dose>or=3.5 mg/kg (n=6). In 19 patients the drug was discontinued prematurely due to side effects or SLE activity. For those patients in whom either liver function test or white blood cell count abnormalities were encountered, metabolites guided attribution to drug or disease activity. CONCLUSION: Clinical responses in SLE can occur at levels of 6-TGN lower than the target range established for IBD. During followup, measurements of AZA metabolites may provide a rational approach to safety

OBJECTIVE: Serial measurements of anti-double-stranded DNA (anti-dsDNA) and complement are routine in the management of systemic lupus erythematosus (SLE), but their utility as biomarkers in preemptive treatment to prevent flares remains a subject of controversy. We hypothesized that concomitant elevation of anti-dsDNA and C3a can predict SLE activity in patients with stable or inactive disease and that short-term treatment with corticosteroids can avert flares. METHODS: In this prospective, randomized, double-blind, placebo-controlled trial, 154 patients were evaluated monthly for up to 18 months, with measurements of C3a, C3, C4, CH50, and anti-dsDNA levels. Patients who remained clinically stable but showed serologic evidence of an SLE flare (elevation of both the anti-dsDNA level by 25% and the C3a level by 50% over the previous 1-2 monthly visits) were randomized to receive either prednisone or placebo therapy at a dosage of 30 mg/day for 2 weeks, 20 mg/day for 1 week, and 10 mg/day for 1 week. RESULTS: Forty-one patients (21 randomized to prednisone and 20 randomized to placebo) experienced a serologic flare. Analysis of severe flares occurring </=90 days from randomization revealed that 6 occurred in patients taking placebo and none occurred in patients taking prednisone (P = 0.007). Severe flares resulted in an increase in the prednisone dosage to >40 mg/day and/or the addition of an immunosuppressive agent. Furthermore, improvement in scores on the Systemic Lupus Erythematosus Disease Activity Index, decreased levels of anti-dsDNA antibodies, and increased levels of C4 occurred 1 month after initiation of prednisone treatment. CONCLUSION: These preliminary data support our hypothesis that in a subset of clinically stable SLE patients with a combination of elevated C3a and anti-dsDNA levels, short-term corticosteroid therapy may avert a severe flare