Displaying publications 101 - 120 of 315 in total

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  1. Sharma JN
    Eur J Rheumatol Inflamm, 1991;11(2):30-7.
    PMID: 1365470
    Components of the kallikrein-kininogen-kinin are activated in response to noxious stimuli (chemical, physical or bacterial), which may lead to excessive release of kinins in the synovial joints that may produce inflammatory joint disease. The inflammatory changes observed in synovial tissue may be due to activation of B2 receptors. Kinins also stimulate the synthesis of other pro-inflammatory agents (PGs, LTs, histamine, EDRF, PGI2 and PAF) in the inflamed joint. B2 receptor antagonists may provide valuable agents as new analgesic drugs. Further, it is suggested that substances directed to reduce the activation of KKS may provide a pharmacological basis for the synthesis of novel anti-rheumatic or anti-inflammatory drugs.
    Matched MeSH terms: Arthritis/etiology*; Arthritis/metabolism
  2. Gururaj AK, Chand RP, Chuah SP
    Clin Neurol Neurosurg, 1988;90(3):261-3.
    PMID: 3197355
    Cerebral involvement associated with juvenile rheumatoid arthritis is rare. It is not influenced by treatment and the presentation can be varied. We describe a case of cerebral infarction secondary to vasculitis in a child with juvenile rheumatoid arthritis.
    Matched MeSH terms: Arthritis, Juvenile/complications*; Arthritis, Juvenile/drug therapy
  3. Mohd Shahrir MS, Eashwary M, Heselynn H, Mohd Shahdan S
    DOI: 10.1111/j.1479-8077.2007.00252.x
    Aim: To provide the first case series analysis for psoriatic arthritis (PsA) in Malaysia.
    Methods: Patient records were studied from rheumatology clinics in Universiti Kebangsaan Malaysia Hospital and Putrajaya Hospital in Malaysia.
    Results: Thirty-one patients from two rheumatology centres were studied. Thirteen patients (41.9%) were male and 18 patients (58.1%) were female. Nineteen patients (61.3%) were Malays, four (12.9%) were Chinese, seven (22.6%) were Indians and one (3.2%) was a Sikh. The majority of patients were in the >.50 years age-group (11 [35.5%]) followed by the 41-50 years age-group (10 [32.3%]). Thirteen patients (41.9%) had the disease since 41-50 years of age. Twenty-three patients (77.4%) had no family history of PsA. Twenty-three patients (74.2%) had psoriasis first, seven (22.6%) had arthritis first and one (3.2%) developed psoriasis and arthritis at the same time. Twenty-four patients (77.4%) had positive activity correlation for skin and arthritis. The majority of patients had symmetrical arthritis (20 [64.5%]) and chronic plaque-like lesions (22 [71.0%]). These patients were on NSAIDS and methotrexate (14 [45.2%]). One patient (3.6%) needed surgery for joint replacement.
    Conclusion: Patients who were diagnosed as having PsA were Malays, age group of more than 50, disease onset at 41-50 years of age, no family history, had symmetrical and chronic plaque lesions, had psoriasis first and needed NSAIDS and methotrexate.
    Matched MeSH terms: Arthritis; Arthritis, Psoriatic*
  4. Sakthiswary R, Singh R
    Rev Bras Reumatol Engl Ed, 2016 09 30;57(2):122-128.
    PMID: 28343616 DOI: 10.1016/j.rbre.2016.09.001
    Rheumatoid arthritis (RA) is a well and widely recognized cause of carpal tunnel syndrome (CTS). In the rheumatoid wrist, synovial expansion, joint erosions and ligamentous laxity result in compression of the median nerve due to increased intracarpal pressure. We evaluated the published studies to determine the prevalence of CTS and the characteristics of the median nerve in RA and its association with clinical parameters such as disease activity, disease duration and seropositivity. A total of 13 studies met the eligibility criteria. Pooled data from 8 studies with random selection of RA patients revealed that 86 out of 1561 (5.5%) subjects had CTS. Subclinical CTS, on the other hand, had a pooled prevalence of 14.0% (30/215). The cross sectional area of the median nerve of the RA patients without CTS were similar to the healthy controls. The vast majority of the studies (8/13) disclosed no significant relationship between the median nerve findings and the clinical or laboratory parameters in RA. The link between RA and the median nerve abnormalities has been overemphasized throughout the literature. The prevalence of CTS in RA is similar to the general population without any correlation between the median nerve characteristics and the clinical parameters of RA.
    Matched MeSH terms: Arthritis, Rheumatoid/complications; Arthritis, Rheumatoid/pathology*
  5. Devaraj NK
    Ethiop J Health Sci, 2018 Jan;28(1):101-102.
    PMID: 29622913 DOI: 10.4314/ejhs.v28i1.13
    Background: Rheumatoid arthritis is a devastating condition. More so, the diagnosis of seronegative rheumatoid arthritis is often fraught off with much uncertainty and that leads to further suffering to the unfortunate patient.

    Case Details: This is a case of Madam A, who presented with many non-specific symptoms and signs involving many systems which was finally diagnosed as seronegative rheumatoid arthritis. This case explores the challenges in reaching this uncommon diagnosis and how anti-inflammatory drugs can bring a miraculous relief to the patient's suffering.

    Conclusion: The diagnosis of seronegative rheumatoid arthritis often presents a real challenge to the medical practitioner and often requires multiple visits and/or shared multidisciplinary care for confirmation of the diagnosis. Once diagnosed and treated with disease modifying anti- rheumatic drugs, often there is a miraculous relief to the patient's suffering.
    Matched MeSH terms: Arthritis, Rheumatoid/diagnosis*; Arthritis, Rheumatoid/drug therapy
  6. Lim CH, Chen HH, Chen YH, Chen DY, Huang WN, Tsai JJ, et al.
    PLoS One, 2017;12(6):e0178035.
    PMID: 28570568 DOI: 10.1371/journal.pone.0178035
    The objective of this study is to determine the risk of tuberculosis (TB) disease in biologics users among rheumatoid arthritis (RA) patients in Taiwan from 2000 to 2015. This retrospective cohort study enrolled adult RA patients initiated on first biologics at Taichung Veterans General Hospital. TB risks were determined as hazard ratio (HR) with 95% confidence interval (CI) using cox regression. A total of 951 patients were recruited; etanercept (n = 443), adalimumab (n = 332), abatacept (n = 74), golimumab (n = 60), tocilizumab (n = 31) and tofacitinib (n = 11). Twenty-four TB cases were identified; 13 in etanercept and 11 in adalimumab group with the TB incidence rate of 889.3/ 100,000 and 1055.6/ 100,000 patient-years respectively. There was no significant difference in TB risk between adalimumab and etanercept users with an incidence rate ratio of 1.27 (p = 0.556 by Poisson model). Significant 2-year TB risk factors included elderly patient >65 year-old (HR: 2.72, 95% CI: 1.06-6.99, p = 0.037), history of TB (HR: 6.24, 95% CI: 1.77-22.00, p = 0.004) and daily glucocorticoid use ≥5mg (HR:5.01, 95% CI: 1.46-17.21, p = 0.010). Sulfasalazine treatment appeared to be protective (HR: 0.32, 95% CI: 0.11-0.97, p = 0.043). Risk management plan (RMP) for TB before initiation of biologics commenced in 2012. The 2-year TB risks after RMP was compared with that before 2012 (HR:0.67, 95% CI: 0.30-1.49, p = 0.323). Elderly RA patients with a history of previous TB infection and concomitant moderate dose glucocorticoid were at higher risk of TB disease. Concurrent sulfasalazine treatment appeared to be a protective factor against TB disease.
    Matched MeSH terms: Arthritis, Rheumatoid/complications*; Arthritis, Rheumatoid/therapy
  7. Syed Mohamed Suhail SM, Nur Atiqah I, Nur Salimi Zakirah ZA, Lailatul Syazwani Z, Batis WW, Md Monoto EM, et al.
    Malays J Pathol, 2019 Dec;41(3):259-265.
    PMID: 31901910
    INTRODUCTION: Rheumatoid arthritis is diagnosed based on the 2010 Rheumatoid Arthritis Classification Criteria whereby rheumatoid factor and anti-citrullinated protein antibody are the serological markers included in these criteria. Anti-RA33 antibody has the potential to provide additional diagnostic value in rheumatoid arthritis. The aim of this study is to determine the diagnostic performance of anti-RA33 antibody as a serological marker for rheumatoid arthritis.

    MATERIAL AND METHODS: Thirtyfour patients with rheumatoid arthritis and 34 non-rheumatoid arthritis individuals were included in this cross-sectional study. Anti-RA33 antibody and rheumatoid factor were performed on all samples.

    RESULTS: The sensitivity, specificity, positive and negative predictive value for anti-RA33 antibody and rheumatoid factor were 41.1%, 97.1%, 93.3%, 62.3% and 64.7%, 79.4%, 75.9%, 69.2% respectively. The overall sensitivity and specificity if either anti-RA33 antibody or rheumatoid factor are positive were 79.4% and 76.47% respectively.

    CONCLUSION: Anti-RA33 antibody showed good specificity and positive predictive value and could be considered as a potential serological marker for rheumatoid arthritis diagnosis.

    Matched MeSH terms: Arthritis, Rheumatoid/blood*; Arthritis, Rheumatoid/diagnosis*
  8. Che Rahim MJ, Wan Mohamad WM, Saddki N, Taib H, Wan Abhamid WZ, Wong KK, et al.
    Malays J Pathol, 2019 Dec;41(3):267-272.
    PMID: 31901911
    INTRODUCTION: Rheumatoid arthritis (RA) is a chronic autoimmune inflammatory disease of the joints with the involvement of other systems. Previous studies have demonstrated its association with chronic periodontitis (CP), a chronic inflammatory disease of tooth-supporting tissues. Positive rheumatoid factor (RF) and anti-citrullinated protein antibody (ACPA) in RA patients have been found to be associated with CP. The aim of this study is to determine the prevalence of CP in RA patients, and to investigate the association of ACPA, RF status and RA disease activity with CP and non-CP RA patients.

    MATERIALS AND METHODS: A comparative cross-sectional study involving 98 RA patients was conducted at Hospital Universiti Sains Malaysia, Kubang Kerian, Malaysia. Clinical oral examination was carried out to determine the CP status of RA patients. RF, ACPA and erythrocyte sedimentation rate (ESR) were measured, and the 28-joint Disease Activity Score (DAS-28) was assessed.

    RESULTS: Forty-five patients (45.9%) were found to have CP (95% CI: 0.36-0.56). No significant difference was observed in the prevalence of positive RF (p=0.989) or ACPA (p=0.431) in CP and non-CP RA patients. There was also no significant association between active RA disease (DAS-28 score ≥3.2) and RF positivity in CP (p=0.927) and non-CP (p=0.431) RA patients as well as ACPA positivity in CP (p=0.780) and non-CP (p=0.611) RA patients.

    CONCLUSION: In our cohort of RA patients, we did not find significant associations between elevated RF, ACPA, or active RA disease with the presence of CP. There were also no significant associations between elevated RF or ACPA with active RA disease.

    Matched MeSH terms: Arthritis, Rheumatoid/blood*; Arthritis, Rheumatoid/diagnosis
  9. Cheah CW, Al-Maleki AR, Vadivelu J, Danaee M, Sockalingam S, Baharuddin NA, et al.
    Int J Rheum Dis, 2020 Oct;23(10):1344-1352.
    PMID: 32743970 DOI: 10.1111/1756-185X.13919
    INTRODUCTION: Rheumatoid arthritis (RA) is associated with chronic periodontitis (CP) due to shared risk factors, immuno-genetics and tissue destruction pathways. Human cathelicidin LL-37 has been suggested as a possible mechanistic link for these diseases. This study investigated the levels of salivary and serum LL-37 in subjects with RA and CP and their correlation with disease parameters.

    METHOD: Subjects were allocated into RA (n = 49) or non-RA (NRA) (n = 55) groups, where 3 subgroups were further established; chronic periodontitis (CP), gingivitis (G) and periodontal health (H). Demographic and periodontal parameters were collected. Rheumatology data were obtained from hospital records. Serum and salivary LL-37 levels were measured using enzyme-linked immunosorbent assay and compared for all groups.

    RESULTS: For salivary LL-37, RA-CP was significantly higher than NRA-G and NRA-H (P = .047). For serum LL-37, all RA and NRA-CP were significantly higher than NRA-G and NRA-H (P = .024). Salivary LL-37 correlated negatively with clinical attachment loss (CAL) (P = .048), but positively with erythrocyte sedimentation rate (ESR) in RA-H (P = .045). Serum LL-37 showed positive correlation with ESR (P = .037) in RA-G, with C-reactive protein (P = .017) in RA-H, but negative correlation with number of teeth (P = .002) in NRA-CP. Rheumatology data correlated positively with periodontal parameters in RA-CP group.

    CONCLUSION: NRA-CP subjects with high serum LL-37 should receive comprehensive periodontal therapy. Positive correlation between rheumatology data and periodontal parameters showed that RA disease stability may be obtained by assessing the periodontal condition. Periodontal therapy is necessary to compliment RA treatment to achieve optimum outcome for RA patients with concurrent CP.

    Matched MeSH terms: Arthritis, Rheumatoid/complications; Arthritis, Rheumatoid/metabolism*
  10. Faisal M, Roslan A, Nik Abeed NN, Ban Yu-Lin A
    BMJ Case Rep, 2021 Jan 06;14(1).
    PMID: 33408105 DOI: 10.1136/bcr-2020-238173
    Organising pneumonia (OP) in rheumatoid arthritis (RA) may be part of pulmonary manifestation (disease related) or disease-modifying antirheumatic drugs (DMARDs) related. We report a case series of RA patients with DMARDs related OP. A 65-year-old woman developed OP 3 weeks after initiation of methotrexate (MTX). High-resolution CT (HRCT) scan of the thorax revealed bilateral consolidations in the lung bases. She had complete radiological resolution 6 months after corticosteroid therapy with cessation of MTX. The second case was of a 60-year-old woman on MTX with recent addition of leflunomide due to flare of RA. She developed worsening cough 4 months later and HRCT scan revealed consolidation in the left upper lobe with biopsy proven OP. She responded within 6 months of corticosteroid therapy with clinical and radiological resolution. This case series highlights that OP may developed with low-dose MTX (as early as 3 weeks) and leflunomide and the diagnosis requires a high index of suspicion.
    Matched MeSH terms: Arthritis, Rheumatoid/diagnosis; Arthritis, Rheumatoid/drug therapy*
  11. Khir NAM, Noh ASM, Shafin N, Ismail CAN
    Purinergic Signal, 2021 Jun;17(2):201-213.
    PMID: 33594635 DOI: 10.1007/s11302-021-09764-z
    Pain is the most common symptom reported by patients with rheumatoid arthritis (RA) even after the resolution of chronic joint inflammation. It is believed that RA-associated pain is not solely due to inflammation, but could also be attributed to aberrant modifications to the central nervous system. The P2X4 receptor (P2X4R) is an ATP-activated purinergic receptor that plays a significant role in the transmission of information in the nervous system and pain. The involvement of P2X4R during the pathogenesis of chronic inflammatory pain and neuropathic pain is well-established. The attenuation of this receptor alleviates disease pathogenesis and related symptoms, including hyperalgesia and allodynia. Although some studies have revealed the contribution of P2X4R in promoting joint inflammation in RA, how it implicates pain associated with RA at peripheral and central nervous systems is still lacking. In this review, the possible contributions of P2X4R in the nervous system and how it implicates pain transmission and responses were examined.
    Matched MeSH terms: Arthritis, Rheumatoid/complications*; Arthritis, Rheumatoid/genetics*
  12. Paval J, Kaitheri SK, Potu BK, Govindan S, Kumar RS, Narayanan SN, et al.
    Clinics (Sao Paulo), 2009;64(4):357-62.
    PMID: 19488595
    OBJECTIVE: To evaluate the anti-arthritic potential of the plant Justicia gendarussa using two different rat models.

    MATERIALS AND METHOD: The anti-arthritic potential of the alcoholic extract of the plant Justicia gendarussa was evaluated using the Freund's adjuvant-induced and collagen-induced arthritic rat models. The rats were treated with the ethanolic extract of Justicia gendarussa and with standard aspirin.

    RESULTS: The ethanolic extract of Justicia gendarussa showed significant anti-arthritic activity that was statistically similar to that of aspirin. Our results suggest that the alcoholic extract of Justicia gendarussa exhibits significant anti-arthritic potential.

    Matched MeSH terms: Arthritis, Experimental/chemically induced; Arthritis, Experimental/drug therapy*
  13. Thumboo J, Tham SN, Tay YK, Chee T, Mow B, Chia HP, et al.
    J Rheumatol, 1997 Oct;24(10):1949-53.
    PMID: 9330937
    OBJECTIVE: To determine the clinical features of psoriatic arthritis (PsA) in a multiethnic Oriental population and to study the effect of ethnicity on disease patterns.
    METHODS: A retrospective study of 80 patients with PsA seen at either a rheumatology or dermatology referral center. Patients and case records were reviewed and data abstracted according to a standard protocol. Eighty consecutive patients with psoriasis without PsA seen at the dermatology center were recruited as controls.
    RESULTS: Asymmetric polyarthritis developing in the 4th decade with an equal male to female ratio was the commonest pattern of arthritis among Chinese, Indians, and Malays. Clinically apparent lumbar spondylitis was significantly more common in Indians than Chinese (10/11 vs 11/20, respectively; p = 0.046), although the prevalence of lumbar spondylitis was similar in all ethnic groups. Eighty-nine percent of subjects required nonsteroidal antiinflammatory drugs and 51% required disease modifying antirheumatic drugs at some time for control of joint disease. PsA was significantly more common among Indians compared to the ethnic distribution of the Singapore population (p < 0.000001). Multiple logistic regression identified Indian ethnicity as a risk factor for the development of PsA (OR 2.39, 95% confidence interval 1.02 to 5.60).
    CONCLUSION: The commonest pattern of PsA in all ethnic groups was asymmetric polyarthritis. Ethnicity affected the development and presentation of PsA in our series: Indians with psoriasis had double the risk of developing PsA compared to Chinese with psoriasis, and lumbar spondylitis when present in Chinese subjects was asymptomatic in 45%, being detectable only on radiological examination.
    Matched MeSH terms: Arthritis, Psoriatic/ethnology*; Arthritis, Psoriatic/epidemiology*
  14. Muhayidina AD, Said MS
    J Clin Med Res, 2009 Aug;1(3):173-7.
    PMID: 22493652 DOI: 10.4021/jocmr2009.08.1254
    This report illustrates five cases of patients admitted to medical ward in HUKM, diagnosed and treated as septic arthritis over the course of two months. Their age ranged from 32 to 67 years old with one patient had history of monoarticular pain and the other four had polyarticular pain. Two of these patients had pre-existing joint disease, namely gouty arthritis and rheumatoid arthritis, and another patient with background history of mixed connective tissue disease on long term steroid therapy. The diagnosis of septic arthritis was made mainly from clinical assessment, supported by synovial fluid assessment and blood investigations. All patients received minimum of two weeks intravenous antibiotic followed by one month course of antibiotic. All of them had arthrocentesis for diagnostic and therapeutic purposes and two had laparoscopic arthroscopy with wash out done.
    Matched MeSH terms: Arthritis, Infectious; Arthritis, Rheumatoid; Arthritis, Gouty
  15. Halder D, Quah BS, Malik AS, Choo KE
    PMID: 9185277
    Neonatal septic arthritis has always been considered as separate from its counterpart in older children. The condition is uncommon but serious. Affected neonates usually survive, but with permanent skeletal deformities. Ten cases of neonatal septic arthritis were diagnosed between January 1989 and December 1993 in the neonatal intensive care units of two referral hospitals in the state of Kelantan, Malaysia. All except one neonate was born prematurely. The mean age of presentation was 15.6 days. Joint swelling (10/10), increased warmth (7/10) and erythema of the overlying skin (7/10) were the common presenting signs. Vague constitutional symptoms preceded the definitive signs of septic arthritis in all cases. The total white cell counts were raised with shift to the left. The knee (60%) was not commonly affected, followed by the hip (13%) and ankle (13%). Three neonates had multiple joint involvement. Coexistence of arthritis with osteomyelitis was observed in seven neonates. The commonest organism isolated was methicillin resistant Staphylococcus aureus (9/10). Needle aspiration was performed in nine neonates and one had incision with drainage. Follow up data was available for five neonates and two of these had skeletal morbidity. Early diagnosis by frequent examination of the joints, prompt treatment and control of nosocomial infection are important for management.
    Matched MeSH terms: Arthritis, Infectious/microbiology; Arthritis, Infectious/epidemiology*; Arthritis, Infectious/physiopathology; Arthritis, Infectious/therapy
  16. Gautam RK, Gupta G, Sharma S, Hatware K, Patil K, Sharma K, et al.
    Int J Rheum Dis, 2019 Jul;22(7):1247-1254.
    PMID: 31155849 DOI: 10.1111/1756-185X.13602
    AIM: The purpose of our investigation is to evaluate the anti-arthritic potential of isolated rosmarinic acid from the rind of Punica granatum.

    METHOD: Rosmarinic acid was isolated by bioactivity-guided isolation from butanolic fraction of Punica granatum and acute toxicity of rosmarinic acid was carried out. The experiment was conducted at doses of 25 and 50 mg/kg, in Freund's complete adjuvant (FCA)-induced arthritic rats. Various parameters, that is arthritic score, paw volume, thickness of paw, hematological, antioxidant and inflammatory parameters such as glutathione (GSH), superoxide dismutase (SOD), malonaldehyde (MDA) and tumor necrosis factor-α (TNF-α) were also estimated.

    RESULTS: Rosmarinic acid significantly decreased the arthritic score, paw volume, joint diameter, white blood cell count and erythrocyte sedimentation rate. It also significantly increased body weight, hemoglobin and red blood cells. The significantly decreased levels of TNF-α were observed in treated groups as compared to arthritic control rats (P 

    Matched MeSH terms: Arthritis, Experimental/chemically induced; Arthritis, Experimental/metabolism; Arthritis, Experimental/pathology; Arthritis, Experimental/prevention & control*
  17. Yahya A, Bengtsson C, Larsson P, Too CL, Mustafa AN, Abdullah NA, et al.
    Mod Rheumatol, 2014 Mar;24(2):271-4.
    PMID: 24593203 DOI: 10.3109/14397595.2013.854076
    OBJECTIVES: Silica exposure has been associated with an increased risk of developing rheumatoid arthritis (RA), especially among smokers. In this study, we aimed at examining the association between silica exposure (and its interaction with smoking) and the risk of RA in the Malaysian population.
    METHODS: In total, 149 cases and 213 matched controls, all men, were included between August 2005 and December 2009. A case was defined as a person with early diagnosed RA using the 1987 American College of Rheumatology criteria for RA. Controls were randomly selected matched on sex, age and residential area. Silica exposure was defined as exposure to stone dust, rock drilling or stone crushing, and smoking status was categorized as ever/never cigarette smoking.
    RESULTS: An increased risk of anti-citrullinated protein antibody (ACPA)-positive RA (OR = 2.4, 95 % CI 1.0-5.6) was observed among those exposed to silica. Ever-smokers exposed to silica had a particularly high risk of developing ACPA-positive RA (OR = 7.5, 95 % CI 2.3-24.2), compared with never-smokers not exposed to silica. No association was found regarding ACPA-negative RA.
    CONCLUSION: Our data demonstrate that exposure to both silica and cigarette smoke comprise risks for developing RA in the Malaysian genetic context. The findings expand a link between environmental lung exposures and ACPA-positive RA to Asian populations.
    Matched MeSH terms: Arthritis, Rheumatoid/etiology*; Arthritis, Rheumatoid/immunology
  18. Tsuru T, Terao K, Murakami M, Matsutani T, Suzaki M, Amamoto T, et al.
    Mod Rheumatol, 2014 May;24(3):511-6.
    PMID: 24252023 DOI: 10.3109/14397595.2013.843743
    To evaluate humoral immune response to influenza vaccine and polysaccharide pneumococcal vaccine in patients with rheumatoid arthritis (RA) or Castleman's disease (CD) during tocilizumab therapy.
    Matched MeSH terms: Arthritis, Rheumatoid/drug therapy*; Arthritis, Rheumatoid/immunology
  19. Bajuri MN, Abdul Kadir MR, Murali MR, Kamarul T
    Med Biol Eng Comput, 2013 Feb;51(1-2):175-86.
    PMID: 23124814 DOI: 10.1007/s11517-012-0982-9
    The total replacement of wrists affected by rheumatoid arthritis (RA) has had mixed outcomes in terms of failure rates. This study was therefore conducted to analyse the biomechanics of wrist arthroplasty using recently reported implants that have shown encouraging results with the aim of providing some insights for the future development of wrist implants. A model of a healthy wrist was developed using computed tomography images from a healthy volunteer. An RA model was simulated based on all ten general characteristics of the disease. The ReMotion ™ total wrist system was then modelled to simulate total wrist arthroplasty (TWA). Finite element analysis was performed with loads simulating the static hand grip action. The results show that the RA model produced distorted patterns of stress distribution with tenfold higher contact pressure than the healthy model. For the TWA model, contact pressure was found to be approximately fivefold lower than the RA model. Compared to the healthy model, significant improvements were observed for the TWA model with minor variations in the stress distribution. In conclusion, the modelled TWA reduced contact pressure between bones but did not restore the stress distribution to the normal healthy condition.
    Matched MeSH terms: Arthritis, Rheumatoid/physiopathology*; Arthritis, Rheumatoid/surgery*
  20. Gomez EL, Gun SC, Somanath SD, Chinna K, Radhakrishnan AK
    Mod Rheumatol, 2013 Jul;23(4):716-21.
    PMID: 22854883 DOI: 10.1007/s10165-012-0718-6
    OBJECTIVES: The prognostic significance of rheumatoid factor (RF) and anticyclic citrullinated peptide antibody (anti-CCP) in rheumatoid arthritis (RA) remains contentious due to the conflicting lines of evidence. This study aims to determine the association between RF isotypes and anti-CCP with disease severity in RA patients from three ethnic groups.
    METHODS: A total of 147 RA patients from three different ethnic groups (Malays, Chinese, and Indians) who fulfilled the 1987 American College of Rheumatology (ACR) revised criteria for RA were recruited into this study. The seroprevalence of RF isotypes immunoglobulin (Ig)A, IgG, and IgM, as well as anti-CCP was determined using commercial enzyme-linked immunosorbent assay (ELISA) kits. Multinomial regression analysis was performed to assess the independent effects of autoantibody status on the development of deforming and erosive RA and the presence of extra-articular manifestations (EAM).
    RESULTS: In Chinese patients, we found a significant association (p < 0.05) between IgG RF and anti-CCP and the presence of erosive disease, as well as IgM RF and IgG RF with the presence of joint deformities. In Indian patients, IgM RF was associated with deforming disease, whereas none of the antibodies were associated with disease severity in Malay patients. Multinomial regression analysis revealed that IgG RF was the most important predictor variable for erosive disease in Chinese patients, and IgM RF the only predictor variable associated with deforming disease in both Chinese and Indian RA patients.
    CONCLUSIONS: There is variability in the phenotypic association of RF isotypes and anti-CCP in relation to disease severity of RA in the three ethnic groups. RF, in particular, IgG and IgM, may be better prognosticators of severe disease in Chinese and Indian patients.
    Matched MeSH terms: Arthritis, Rheumatoid/ethnology; Arthritis, Rheumatoid/immunology*
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