Rheumatoid arthritis

Role of cytolytic impairment of natural killer and natural killer T-cell populations in rheumatoid arthritis

Innate immunity has been widely accepted as one of the major cause for the alteration of immune system and progression of autoimmune diseases. Natural killer (NK) cells and natural killer T (NKT) cells have not been explored in clinical studies for their cytolytic components in association with rheumatoid arthritis (RA). The literature available for these potential candidates is controversial in terms of their protective or pathogenic role in disease severity of RA. Present study explained the role of NK and NKT cell populations and intracellular expression of caspases, perforin, granzymes A and B in the pathogenesis of RA in patients. DAS28 score was measured as the disease severity. Immunochemical parameters were studied by using monoclonal antibodies (mAbs) against different cell types in flow cytometry. Results indicated that that whatsoever is the change in percentage cell populations, ratio of NK and NKT cell populations always remained poised even in the disease state. Reactive oxygen species (ROS) levels were elevated with increased intracellular active caspase-3, perforin and granzyme expression in RA patients. Their elevated expressions were positively correlated with DAS28 suggesting the pathogenic role in RA. The expressions of pro-inflammatory cytokines were enhanced while the anti-inflammatory cytokine expressions were diminished in the patients. Present study may point towards futuristic therapeutic targets which can fascinate the pharmaceutical industries to selectively target these molecules in designing the therapeutic strategy of RA patients.

Vascular function and morphology in rheumatoid arthritis: a systematic review

OBJECTIVES

RA associates with significantly increased morbidity and mortality from cardiovascular disease (CVD). This may be due to complex interactions between traditional CVD risk factors, systemic rheumatoid inflammation and the vasculature. We reviewed the current literature to answer: (i) whether there is sufficient evidence that patients with RA have altered vascular function and morphology compared with normal controls; (ii) whether there is sufficient evidence to determine if such changes relate predominantly to systemic inflammation; and (iii) whether any changes of vascular function and morphology in RA can be modified with therapy.

METHODS

The MEDLINE database was searched to identify publications from 1974 to 1 November 2010 pertaining to vascular function and morphology in RA. The total number of articles included in the present review was 93. This included 57 cross-sectional studies, 27 longitudinal studies without randomization and 9 longitudinal studies with randomization.

RESULTS

Vascular function and morphology was impaired in RA relative to healthy controls. The majority of studies reported no associations between systemic inflammation and vascular function. Treatment with anti-inflammatory medication resulted in both transient and long-term improvements in the vasculature, but only a few studies reported associations between change in inflammation and change in vascular function and morphology.

CONCLUSION

The link between systemic inflammation and vascular function and morphology is not wholly supported by the available literature. Long-term studies examining specific predictors (including CVD risk factors) on the vasculature in RA are needed.

Conservative hand therapy treatments in rheumatoid arthritis--a randomized controlled trial

OBJECTIVE

To evaluate the effectiveness of three different physiotherapeutic approaches in the management of the rheumatoid hand.

METHODS

In a randomized controlled trial, participants with rheumatoid arthritis (RA) recruited from a rheumatology department in Mid-Staffordshire, UK (February 1999 to January 2001) were randomized to three groups. All received joint protection (JP) information delivered by a therapist at baseline. Group 1 participants received a set of additional hand-strengthening and mobilizing home exercises, group 2 a different set of additional hand-stretching exercises and group 3 the JP information alone. The primary outcome was the Arthritis Impact Measurement Scales II (AIMS II) (upper limb; hand and finger function subscales). Outcomes were assessed at baseline and 1, 3 and 6 months. Analysis was by intention to treat.

RESULTS

Sixty-seven participants (mean age 59.6 yr) were recruited: group 1 n = 21, group 2 n = 24 and group 3 n = 22. A 78% follow-up was achieved at 6 months. There was a mean fall (SD) in AIMS II upper limb function 0-6 month change scores in group 1 of 1.00 (1.07). In groups 2 and 3 there was a mean increase in AIMS II scores of 0.18 (1.54) and 0.30 (1.22), respectively. The differences in AIMS change scores between group 1 and groups 2 and 3 were statistically significant (P = 0.007) and remained so after adjustment for multiple testing (P = 0.012).

CONCLUSION

Statistically significant improvements in arm function have been demonstrated following a programme of home-strengthening hand exercises in RA patients compared with simple stretches or advice alone.

The incidence of whiplash trauma and the effects of different factors on recovery

We performed a prospective study of patients with a whiplash trauma to the cervical spine to describe the incidence of these injuries and to evaluate prognostic factors for disability and recovery. A total of 356 patients were enrolled in the study. All the patients received a comprehensive questionnaire after the injury, and 296 cases responded to the follow-up protocol more than 1 year after the accident. Disability related to the whiplash trauma was used as the outcome variable for the assessment of prognostic factors. The annual incidence of acute whiplash trauma in the catchment area was 4.2 per 1,000 inhabitants and 3.2 per 1,000 for whiplash-associated disorder grades 1-3. Thirty-two percent reported persisting disability at follow-up. The following factors were significantly associated with a poor prognosis: pretraumatic neck pain, low educational level, female gender, and whiplash-associated disorder grades 2-3.