Replication of the tumor necrosis factor receptor-associated factor 1/complement component 5 region as a susceptibility locus for rheumatoid arthritis in a European family-based study

OBJECTIVE

We recently showed, using a candidate gene approach in a case-control association study, that a 65-kb block encompassing tumor necrosis factor receptor-associated factor 1 (TRAF1) and C5 is strongly associated with rheumatoid arthritis (RA). Compared with case-control association studies, family-based studies have the added advantage of controlling potential differences in population structure and are not likely to be hampered by variation in population allele frequencies, as is seen for many genetic polymorphisms, including the TRAF1/C5 locus. The aim of this study was to confirm this association in populations of European origin by using a family-based approach.

METHODS

A total of 1,356 western European white individuals from 452 "trio" families were genotyped for the rs10818488 polymorphism, using the TaqMan allelic discrimination assay.

RESULTS

We observed evidence for association, demonstrating departure from Mendel's law, with an overtransmission of the rs10818488 A allele (A = 55%; P = 0.036). By taking into consideration parental phenotypes, we also observed an increased A allele frequency in affected versus unaffected parents (A = 64%; combined P = 0.015). Individuals carrying the A allele had a 1.2-fold increased risk of developing RA (allelic odds ratio 1.24, 95% confidence interval 1.04-1.50).

CONCLUSION

Using a family-based study that is robust against population stratification, we provide evidence for the association of the TRAF1/C5 rs10818488 A allele and RA in populations of European descent, further substantiating our previous findings. Future functional studies should yield insight into the biologic relevance of this locus to the pathways involved in RA.

Yet more evidence that osteoarthritis is not a cartilage disease

A better insight into the realities behind osteoarthritis

Autologous stem cell transplantation in the treatment of systemic sclerosis: report from the EBMT/EULAR Registry

OBJECTIVE

To analyse the durability of the responses after haematopoietic stem cell transplantation (HSCT) for severe systemic sclerosis (SSc) and determine whether the high transplant related mortality (TRM) improved with experience. This EBMT/EULAR report describes the longer outcome of patients originally described in addition to newly recruited cases.

METHODS

Only patients with SSc, treated by HSCT in European phase I-II studies from 1996 up to 2002, with more than 6 months of follow up were included. Transplant regimens were according to the international consensus statements. Repeated evaluations analysed complete, partial, or non-response and the probability of disease progression and survival after HSCT (Kaplan-Meier).

RESULTS

Given as median (range). Among 57 patients aged 40 (9.1-68.7) years the skin scores improved at 6 (n = 37 patients), 12 (n = 30), 24 (n = 19), and 36 (n = 10) months after HSCT (p<0.005). After 22.9 (4.5-81.1) months, partial (n = 32) or complete response (n = 14) was seen in 92% and non-response in 8% (n = 4) of 50 observed cases. 35% of the patients with initial partial (n = 13/32) or complete response (n = 3/14) relapsed within 10 (2.2-48.7) months after HSCT. The TRM was 8.7% (n = 5/57). Deaths related to progression accounted for 14% (n = 8/57) of the 23% (n = 13/57) total mortality rate. At 5 years, progression probability was 48% (95% CI 28 to 68) and the projected survival was 72% (95% CI 59 to 75).

CONCLUSION

This EBMT/EULAR report showed that response in two thirds of the patients after HSCT was durable with an acceptable TRM. Based on these results prospective, randomised trials are proceeding.

Phase I/II trial of autologous stem cell transplantation in systemic sclerosis: procedure related mortality and impact on skin disease

BACKGROUND

Systemic sclerosis (SSc, scleroderma) in either its diffuse or limited skin forms has a high mortality when vital organs are affected. No treatment has been shown to influence the outcome or significantly affect the skin score, though many forms of immunosuppression have been tried. Recent developments in haemopoietic stem cell transplantation (HSCT) have allowed the application of profound immunosuppression followed by HSCT, or rescue, to autoimmune diseases such as SSc.

METHODS

Results for 41 patients included in continuing multicentre open phase I/II studies using HSCT in the treatment of poor prognosis SSc are reported. Thirty seven patients had a predominantly diffuse skin form of the disease and four the limited form, with some clinical overlap. Median age was 41 years with a 5:1 female to male ratio. The skin score was >50% of maximum in 20/33 (61%) patients, with some lung disease attributable to SSc in 28/37 (76%), the forced vital capacity being <70% of the predicted value in 18/36 (50%). Pulmonary hypertension was described in 7/37 (19%) patients and renal disease in 5/37 (14%). The Scl-70 antibody was positive in 18/32 (56%) and the anticentromere antibody in 10% of evaluable patients. Peripheral blood stem cell mobilisation was performed with cyclophosphamide or granulocyte colony stimulating factor, alone or in combination. Thirty eight patients had ex vivo CD34 stem cell selection, with additional T cell depletion in seven. Seven conditioning regimens were used, but six of these used haemoimmunoablative doses of cyclophosphamide +/- anti-thymocyte globulin +/- total body irradiation. The median duration of follow up was 12 months (3-55).

RESULTS

An improvement in skin score of >25% after transplantation occurred in 20/29 (69%) evaluable patients, and deterioration in 2/29 (7%). Lung function did not change significantly after transplantation. One of five renal cases deteriorated but with no new occurrences of renal disease after HSCT, and the pulmonary hypertension did not progress in the evaluable cases. Disease progression was seen in 7/37 (19%) patients after HSCT with a median period of 67 (range 49-255) days. Eleven (27%) patients had died at census and seven (17%) deaths were considered to be related to the procedure (direct organ toxicity in four, haemorrhage in two, and infection/neutropenic fever in one). The cumulative probability of survival at one year was 73% (95% CI 58 to 88) by Kaplan-Meier analysis.

CONCLUSION

Despite a higher procedure related mortality rate from HSCT in SSc compared with patients with breast cancer and non-Hodgkin's lymphoma, the marked impact on skin score, a surrogate marker of mortality, the trend towards stabilisation of lung involvement, and lack of other treatment alternatives justify further carefully designed studies. If future trials incorporate inclusion and exclusion criteria based on this preliminary experience, the predicted procedure related mortality should be around 10%.

Evaluating hand surgery in patients with rheumatoid arthritis: short-term effect on dexterity and pain and its relationship with patient satisfaction

Short-term effect of hand surgery on hand function in activities of daily life (dexterity) and pain were studied in 70 patients with rheumatoid arthritis. Only surgical interventions aimed at improvement of function and/or pain relief were included in the study. Patients were assessed before surgery and 6 and 12 months after surgery. Clinical change in the surgical group was observed in the number of painful and swollen joints, observed dexterity, and pain in the hand. Six months after surgery 74% of the patients showed positive clinical change in hand functioning and/or hand pain. Clinical effects remained stable between 6 and 12 months after surgical assessments. Both change in observed dexterity and pain had an independent impact on the patient's satisfaction with the results of the surgery.

The negative effect of decreasing the level of activity in coping with pain in rheumatoid arthritis: an increase in psychological distress and disease impact

The objective of this study was to analyze the effect of coping with pain in rheumatoid arthritis (RA) on subsequent changes in psychological distress and disease impact. A sample of 109 randomly selected RA patients was asked to participate in a longitudinal study. Patients were measured at baseline and after 3 years. Both measurements were completed in 80 patients. At each assessment the following variables were assessed: disease activity, pain, physical and psychological distress, disease impact, and coping. The relation between coping with pain at baseline and subsequent changes in psychological distress and disease impact was analyzed using stepwise regression. Disease status variables assessed at baseline and after 3 years were entered in the regression analysis as control variables. Results show that cognitive coping with pain at baseline was not related to subsequent changes in psychological distress or disease impact. On the other hand, behavioral pain coping assessed at baseline was related to subsequent changes in psychological distress and disease impact. "Decreasing activity" was related to an increase in self-reported psychological distress and disease impact after controlling for disease status at both assessments. It was concluded that cognitive pain coping did not predict any subsequent changes in psychological distress or disease impact. "Decreasing activity" as a behavioral pain coping style has a negative effect on subsequent changes in psychological distress and disease impact.

Behavioral coping and physical functioning: the effect of adjusting the level of activity on observed dexterity

OBJECTIVE

To assess the relationship between behavioral coping and dexterity in rheumatoid arthritis (RA) after controlling for disease activity, impairment of the hands, and pain.

METHODS

A random sample of 109 patients with RA was assessed twice within one year. Dexterity, disease activity, and impairment of the hands were measured using observational methods. Pain and coping with RA were assessed using self-report instruments.

RESULTS

Correlational findings showed that "decreasing activity" to cope with pain was negatively related to dexterity. "Pacing" as a way of coping with limitations was positively related to dexterity. Both relations were significant after controlling for duration of disease, impairment of hands, disease activity, and pain. "Decreasing activity" as a way of coping with pain was related to a decrease in dexterity in the subsequent year, after controlling for baseline measurements of dexterity, impairment, and disease activity as well as measurements of current disease activity and pain. "Pacing" as a way of coping with limitations was unrelated to subsequent changes in dexterity, after controlling for the above mentioned variables.

CONCLUSION

Behaviorial coping is related to current and subsequent levels of dexterity. Therefore, it is concluded that more attention should be given to behaviorial coping in both research and clinical practice.

Predictors of changes in observed dexterity during one year in patients with rheumatoid arthritis

OBJECTIVE

To determine which disease-related variables predict loss of dexterity in patients with rheumatoid arthritis (RA).

METHODS

A random sample of 94 RA patients was measured twice 1 yr apart. Dexterity, or hand-related disability, was measured with the Sequential Occupational Dexterity Assessment (SODA). The SODA measures dexterity in activities of daily life based on the observation of standardized tasks. Impairment of the hands, disease activity, pain and self-reported functioning were additionally assessed.

RESULTS

After 1 yr, observed dexterity was significantly decreased. Change in dexterity was predicted by impairment of the hands at baseline. Changes in dexterity were related to changes in grip strength, disease activity indicators, self-care, depressive mood and cheerful mood. An increase in the number of swollen joints was most strongly correlated with a decrease in dexterity, even after controlling for impairment at baseline.

CONCLUSION

It was concluded that even in patients with longer disease duration, observed dexterity declines gradually.

Disease-specific stressors in rheumatoid arthritis: coping and well-being

Results with Coping with Rheumatic Stressors (CORS) are reported. The CORS measures eight coping styles directed at the most important chronic stressors of RA i.e. pain, limitations, and dependence. The relation between coping and well-being was analysed while controlling for relevant disease status variables. Comforting cognitions, decreasing activity and diverting attention were styles of coping with pain that were related to well-being, when level of pain was controlled. Optimism, pacing, and seeking creative solutions were styles of coping with limitations. Both optimism and pacing were related to well-being, when functional capacity was being controlled. Acceptance and showing consideration were styles of coping with dependence. Consideration was the only coping style related to well-being, when functional capacity and social network were being controlled.

Mucocutaneous reactions to gold: a prospective study of 74 patients with rheumatoid arthritis

OBJECTIVE

To describe causality, morphology, course, and risk factors of mucocutaneous reactions to gold.

METHODS

A prospective study of 74 patients with rheumatoid arthritis starting with gold thioglucose.

RESULTS

Thirty-nine patients experienced an episode of gold dermatitis. Sixteen patients continued gold treatment. The estimated treatment withdrawal at 1 year was 26%. The clinical picture was variable and nonspecific. Gold dermatitis was associated with HLA-B35 and disease duration.

CONCLUSION

Mucocutaneous reactions to gold are nonspecific, therefore a causality assessment is necessary. Incidence is high, but treatment can often be continued with dose reduction and local steroids. The predictive value of risk factors is low.

Stress caused by rheumatoid arthritis: relation among subjective stressors of the disease, disease status, and well-being

Two integrated studies, examining the chronic stressors specific to the disease rheumatoid arthritis, are described. Pain, limitation, and dependence were rated as the most annoying chronic stressors of the disease. Pain was measured with the Visual Analog Scale and the McGill Pain Questionnaire. Both pain scores were only weakly related to the medical assessment variables. New scales were developed to measure perceived limitation and dependence. Perceived limitation was inversely related to both mobility and self-care, but this association was not strong. Perceived dependence was unrelated to any of the health status measures. All three stressors were associated with indicators of quality of life even after controlling for interaction with clinical assessment and functional status variables. It was concluded from these studies that patients with rheumatoid arthritis must cope simultaneously with pain, limitation, and dependence.

[Pain in rheumatoid arthritis measured with the visual analogue scale and the Dutch version of the McGill Pain Questionnaire]

Chronic pain is an important symptom of rheumatoid arthritis (RA). Pain is a complex experience and is not easily measured with a single instrument. Recently a Dutch version of the McGill Pain Questionnaire (MPQ) became available. The MPQ is a measure of the quality of pain as opposed to the traditional measures of pain intensity such as the Visual Analog Scale (VAS). In a study of 415 RA patients both measures of pain were administered. Both pain measures were only weakly related to medical variables. The VAS is easily administered and is reliable. The MPQ offers insight in the sensory experience of pain and gives more information about the quality of life of the patient. The conclusion is that the MPQ is a useful instrument to obtain a better picture of the complexity of the pain experience in RA.

Longterm treatment with nonsteroidal antiinflammatory drugs in rheumatoid arthritis: a prospective drug survival study

The longterm use of nonsteroidal antiinflammatory drugs (NSAID) was studied in a consecutive sample of 148 patients with recently diagnosed rheumatoid arthritis. A survival analysis was done in which treatment terminations due to side effects and to insufficient therapeutic effect were used as index causes. Cumulative drug 'survival' of indomethacin with treatment terminations due to untoward reactions as endpoints was significantly less compared to naproxen and diclofenac (p less than 0.001). No significant difference with termination due to lack of efficacy as index cause was observed (p greater than 0.90). No influence of sex or age on the drug survival with the different endpoints mentioned above could be established.

Circulating immune complexes and rheumatoid arthritis: the induction of immune complex formation between rheumatoid factor and IgG by polyethylene glycol

Circulating immune complexes (CIC) as detected by the C1q binding assay (C1qBA) in sera from patients with rheumatoid arthritis (RA) were not demonstrable in these sera with the indirect granulocyte phagocytosis test (IGPT). This discrepancy could be explained by the finding that polyethylene glycol (PEG), used in the C1qBA, enhanced the binding of rheumatoid factor IgM (RFIgM) and IgG resulting in immune complex (IC) formation. The addition of PEG to RA sera and subsequent testing of these sera in the IGPT revealed increased uptake of IC by these cells, dependent on the PEG dose. Addition of purified RFIgM to a normal human serum generated a positive IGPT in a dose dependent way. We conclude that in RA sera PEG induces IC between RFIgM and IgG. Therefore, assays devised to measure CIC in RA sera which are based on PEG (like the C1qBA) overestimate the amounts of IC present in the circulation in vivo.