ArthritisPub Date : 2012-01-01Epub Date: 2012-07-25DOI: 10.1155/2012/240376
David Wallace, Christa Barr
{"title":"The effect of hip bracing on gait in patients with medial knee osteoarthritis.","authors":"David Wallace, Christa Barr","doi":"10.1155/2012/240376","DOIUrl":"https://doi.org/10.1155/2012/240376","url":null,"abstract":"<p><p>Objective. Impaired hip motion has been associated with heightened medial knee joint loading in patients with knee osteoarthritis (OA). A hip external rotation strap designed to pull the femur into external rotation and abduction may serve as one protective mechanism. The primary aim of our study is to determine if the strap decreases medial knee joint loading during level walking in people with knee OA. Design. This study is a single-day repeated measures design. Methods. 15 volunteers with medial knee OA underwent motion analysis data collection during two randomly assigned walking conditions: (1) wearing the strap and (2) control (no strap). Primary outcome measures were peak pelvis, hip and knee joint motions, and torques. These outcomes were averaged across five trials for each condition. Results. Hip abduction (P < 0.01), trunk lean towards the stance limb (P = 0.04) and pelvic tilt (P = 0.02) significantly increased with the strap versus control trials. Knee adduction loading did not significantly change with the strap (P = 0.33). Conclusion. The use of the hip external rotation strap resulted in angular changes at the hip and pelvis which may be beneficial for patients with medial knee osteoarthritis.</p>","PeriodicalId":89323,"journal":{"name":"Arthritis","volume":"2012 ","pages":"240376"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2012/240376","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30830065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ArthritisPub Date : 2012-01-01Epub Date: 2012-12-27DOI: 10.1155/2012/764621
Martin H Gregory, Nicholas Capito, Keiichi Kuroki, Aaron M Stoker, James L Cook, Seth L Sherman
{"title":"A review of translational animal models for knee osteoarthritis.","authors":"Martin H Gregory, Nicholas Capito, Keiichi Kuroki, Aaron M Stoker, James L Cook, Seth L Sherman","doi":"10.1155/2012/764621","DOIUrl":"https://doi.org/10.1155/2012/764621","url":null,"abstract":"<p><p>Knee osteoarthritis remains a tremendous public health concern, both in terms of health-related quality of life and financial burden of disease. Translational research is a critical step towards understanding and mitigating the long-term effects of this disease process. Animal models provide practical and clinically relevant ways to study both the natural history and response to treatment of knee osteoarthritis. Many factors including size, cost, and method of inducing osteoarthritis are important considerations for choosing an appropriate animal model. Smaller animals are useful because of their ease of use and cost, while larger animals are advantageous because of their anatomical similarity to humans. This evidence-based review will compare and contrast several different animal models for knee osteoarthritis. Our goal is to inform the clinician about current research models, in order to facilitate the transfer of knowledge from the \"bench\" to the \"bedside.\"</p>","PeriodicalId":89323,"journal":{"name":"Arthritis","volume":"2012 ","pages":"764621"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2012/764621","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31168448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Expression of Angiotensin II Receptor-1 in Human Articular Chondrocytes.","authors":"Yuki Kawakami, Kosuke Matsuo, Minako Murata, Kazuo Yudoh, Hiroshi Nakamura, Hiroyuki Shimizu, Moroe Beppu, Yutaka Inaba, Tomoyuki Saito, Tomohiro Kato, Kayo Masuko","doi":"10.1155/2012/648537","DOIUrl":"https://doi.org/10.1155/2012/648537","url":null,"abstract":"<p><p>Background. Besides its involvement in the cardiovascular system, the renin-angiotensin-aldosterone (RAS) system has also been suggested to play an important role in inflammation. To explore the role of this system in cartilage damage in arthritis, we investigated the expression of angiotensin II receptors in chondrocytes. Methods. Articular cartilage was obtained from patients with osteoarthritis, rheumatoid arthritis, and traumatic fractures who were undergoing arthroplasty. Chondrocytes were isolated and cultured in vitro with or without interleukin (IL-1). The expression of angiotensin II receptor types 1 (AT1R) and 2 (AT2R) mRNA by the chondrocytes was analyzed using reverse transcription-polymerase chain reaction (RT-PCR). AT1R expression in cartilage tissue was analyzed using immunohistochemistry. The effect of IL-1 on AT1R/AT2R expression in the chondrocytes was analyzed by quantitative PCR and flow cytometry. Results. Chondrocytes from all patient types expressed AT1R/AT2R mRNA, though considerable variation was found between samples. Immunohistochemical analysis confirmed AT1R expression at the protein level. Stimulation with IL-1 enhanced the expression of AT1R/AT2R mRNA in OA and RA chondrocytes. Conclusions. Human articular chondrocytes, at least partially, express angiotensin II receptors, and IL-1 stimulation induced AT1R/AT2R mRNA expression significantly.</p>","PeriodicalId":89323,"journal":{"name":"Arthritis","volume":"2012 ","pages":"648537"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2012/648537","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31180592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ArthritisPub Date : 2012-01-01Epub Date: 2012-12-31DOI: 10.1155/2012/560634
Elizabeth Dean, Rasmus Gormsen Hansen
{"title":"Prescribing optimal nutrition and physical activity as \"first-line\" interventions for best practice management of chronic low-grade inflammation associated with osteoarthritis: evidence synthesis.","authors":"Elizabeth Dean, Rasmus Gormsen Hansen","doi":"10.1155/2012/560634","DOIUrl":"10.1155/2012/560634","url":null,"abstract":"<p><p>Low-grade inflammation and oxidative stress underlie chronic osteoarthritis. Although best-practice guidelines for osteoarthritis emphasize self-management including weight control and exercise, the role of lifestyle behavior change to address chronic low-grade inflammation has not been a focus of first-line management. This paper synthesizes the literature that supports the idea in which the Western diet and inactivity are proinflammatory, whereas a plant-based diet and activity are anti-inflammatory, and that low-grade inflammation and oxidative stress underlying osteoarthritis often coexist with lifestyle-related risk factors and conditions. We provide evidence-informed recommendations on how lifestyle behavior change can be integrated into \"first-line\" osteoarthritis management through teamwork and targeted evidence-based interventions. Healthy living can be exploited to reduce inflammation, oxidative stress, and related pain and disability and improve patients' overall health. This approach aligns with evidence-based best practice and holds the promise of eliminating or reducing chronic low-grade inflammation, attenuating disease progression, reducing weight, maximizing health by minimizing a patient's risk or manifestations of other lifestyle-related conditions hallmarked by chronic low-grade inflammation, and reducing the need for medications and surgery. This approach provides an informed cost effective basis for prevention, potential reversal, and management of signs and symptoms of chronic osteoarthritis and has implications for research paradigms in osteoarthritis.</p>","PeriodicalId":89323,"journal":{"name":"Arthritis","volume":"2012 ","pages":"560634"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2012/560634","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31180593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ArthritisPub Date : 2012-01-01Epub Date: 2012-10-17DOI: 10.1155/2012/185208
Vandana Ayyar, Richard Burnett, Fiona J Coutts, Marietta L van der Linden, Thomas H Mercer
{"title":"The Influence of Obesity on Patient Reported Outcomes following Total Knee Replacement.","authors":"Vandana Ayyar, Richard Burnett, Fiona J Coutts, Marietta L van der Linden, Thomas H Mercer","doi":"10.1155/2012/185208","DOIUrl":"10.1155/2012/185208","url":null,"abstract":"<p><p>This study retrospectively analysed the effects of obesity as described by Body Mass Index (BMI) on patient reported outcomes following total knee replacement. Participants (105 females and 66 males) who had undergone surgery under the care of a single surgeon were included in the review and were grouped according to their preoperative BMI into nonobese (BMI < 30 kg/m(2)), (n = 73) obese (BMI ≥ 30 kg/m(2)) (n = 98). Oxford Knee Score (OKS) and Short Form 12 scores (SF12) were taken preoperatively and 6 and 12 months after surgery to analyse differences between groups in the absolute scores as well as changes from before to after surgery. Preoperatively, the obese group had a significantly poorer OKS compared to non obese (44.7 versus 41.2, P = 0.003). There were no statistically significant group effects on follow-up or change scores of the OKS and SF12. Correlations coefficients between BMI and follow-up and change scores were low (r < 0.201). There were no significant differences in the number of complications and revisions (local wound infection, 6.7% non obese, 11% obese, postoperative systemic complication, 8% non obese, 12% obese, revision, 4% nonobese, 3% obese). In conclusion, our findings indicate similar degrees of benefits from the surgery irrespective of patient BMI.</p>","PeriodicalId":89323,"journal":{"name":"Arthritis","volume":"2012 ","pages":"185208"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3483674/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31018814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ArthritisPub Date : 2012-01-01Epub Date: 2012-11-07DOI: 10.1155/2012/239310
Mohammad Javad Fattahi, Abbas Mirshafiey
{"title":"Prostaglandins and rheumatoid arthritis.","authors":"Mohammad Javad Fattahi, Abbas Mirshafiey","doi":"10.1155/2012/239310","DOIUrl":"https://doi.org/10.1155/2012/239310","url":null,"abstract":"<p><p>Rheumatoid arthritis (RA) is a chronic, autoimmune, and complex inflammatory disease leading to bone and cartilage destruction, whose cause remains obscure. Accumulation of genetic susceptibility, environmental factors, and dysregulated immune responses are necessary for mounting this self-reacting disease. Inflamed joints are infiltrated by a heterogeneous population of cellular and soluble mediators of the immune system, such as T cells, B cells, macrophages, cytokines, and prostaglandins (PGs). Prostaglandins are lipid inflammatory mediators derived from the arachidonic acid by multienzymatic reactions. They both sustain homeostatic mechanisms and mediate pathogenic processes, including the inflammatory reaction. They play both beneficial and harmful roles during inflammation, according to their site of action and the etiology of the inflammatory response. With respect to the role of PGs in inflammation, they can be effective mediators in the pathophysiology of RA. Thus the use of agonists or antagonists of PG receptors may be considered as a new therapeutic protocol in RA. In this paper, we try to elucidate the role of PGs in the immunopathology of RA.</p>","PeriodicalId":89323,"journal":{"name":"Arthritis","volume":"2012 ","pages":"239310"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2012/239310","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31082877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Usefulness of patients-reported outcomes in rheumatoid arthritis focus group.","authors":"Jenny Amaya-Amaya, Diana Botello-Corzo, Omar-Javier Calixto, Rolando Calderón-Rojas, Aura-Maria Domínguez, Paola Cruz-Tapias, Gladis Montoya-Ortiz, Ruben-Dario Mantilla, Juan-Manuel Anaya, Adriana Rojas-Villarraga","doi":"10.1155/2012/935187","DOIUrl":"10.1155/2012/935187","url":null,"abstract":"<p><p>Objective. Patient-reported outcomes (PROs) have become an essential part of the assessment of patients with rheumatoid arthritis (RA). We aimed to evaluate the agreement and correlation between PROs and the physician's measurements. Methods. This was a cross-sectional analytical study in which 135 patients with RA were clinically evaluated during two different sessions of focus group interviews. Rheumatologist recorded 28 swollen (SJCs) and tender joint counts (TJCs). The patients filled out the PROs instruments (MDHAQ, RADAI, RAPID3, 4, and 5 and self-report articular index (SAI) diagram for pain and joint swelling). DAS28 was calculated (C-reactive protein). An adjusted multiple lineal regression model was done (DAS28 as dependent variable). Results. Highly significant agreements were found between SJC and TJC registered by the physician and patient. There was moderate correlation between DAS28 with patient SJC (r = 0.52), patient TJC (r = 0.55), RADAI (r = 0.56), RAPID3 (r = 0.52), RAPID4 (r = 0.56), RAPID5 (r = 0.66), and VAS-Global (r = 0.51). Likewise, we found moderate to high correlations between CDAI and SDAI with all variable measurements done by the patients. The resulting predictive equation was DAS28(CRP) = 2.02 + 0.037 × RAPID4 + 0.042× patient SJC. Conclusion. PROs applied in focus groups interview are a useful tool for managing patients with RA regardless of gender, educational level, and duration of disease.</p>","PeriodicalId":89323,"journal":{"name":"Arthritis","volume":"2012 ","pages":"935187"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2012/935187","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31001527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ArthritisPub Date : 2012-01-01Epub Date: 2012-10-18DOI: 10.1155/2012/604187
Cesar A Speck-Hernandez, Gladis Montoya-Ortiz
{"title":"Silicon, a Possible Link between Environmental Exposure and Autoimmune Diseases: The Case of Rheumatoid Arthritis.","authors":"Cesar A Speck-Hernandez, Gladis Montoya-Ortiz","doi":"10.1155/2012/604187","DOIUrl":"https://doi.org/10.1155/2012/604187","url":null,"abstract":"<p><p>Silicon is one of the most common chemicals on earth. Several compounds such as silica, asbestos, silicone or, nanoparticles are built from tetrahedral units with silicon as the central atom. Despite these, structural similarities, they have rarely been analyzed as a group. These compounds generate significant biological alterations that include immune hyperactivation, production of the reactive species of oxygen and tissue injury. These pathological processes may trigger autoimmune responses and lead to the development of rheumatoid arthritis. Populations at risk include those that constantly work in industrial process, mining, and agriculture as well as those that undergo silicone implants. Herein a review on the main features of these compounds and how they may induce autoimmune responses is presented.</p>","PeriodicalId":89323,"journal":{"name":"Arthritis","volume":"2012 ","pages":"604187"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2012/604187","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31018815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ArthritisPub Date : 2012-01-01Epub Date: 2012-01-11DOI: 10.1155/2012/735472
Akikazu Ishihara, Jeffrey S Bartlett, Alicia L Bertone
{"title":"Inflammation and immune response of intra-articular serotype 2 adeno-associated virus or adenovirus vectors in a large animal model.","authors":"Akikazu Ishihara, Jeffrey S Bartlett, Alicia L Bertone","doi":"10.1155/2012/735472","DOIUrl":"https://doi.org/10.1155/2012/735472","url":null,"abstract":"<p><p>Intra-articular gene therapy has potential for the treatment of osteoarthritis and rheumatoid arthritis. To quantify in vitro relative gene transduction, equine chondrocytes and synovial cells were treated with adenovirus vectors (Ad), serotype 2 adeno-associated virus vectors (rAAV2), or self-complementary (sc) AAV2 vectors carrying green fluorescent protein (GFP). Using 6 horses, bilateral metacarpophalangeal joints were injected with Ad, rAAV2, or scAAV2 vectors carrying GFP genes to assess the in vivo joint inflammation and neutralizing antibody (NAb) titer in serum and joint fluid. In vitro, the greater transduction efficiency and sustained gene expression were achieved by scAAV2 compared to rAAV2 in equine chondrocytes and synovial cells. In vivo, AAV2 demonstrated less joint inflammation than Ad, but similar NAb titer. The scAAV2 vectors can induce superior gene transduction than rAAV2 in articular cells, and both rAAV2 and scAAV2 vectors were showed to be safer for intra-articular use than Ad vectors.</p>","PeriodicalId":89323,"journal":{"name":"Arthritis","volume":"2012 ","pages":"735472"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2012/735472","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30421522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ArthritisPub Date : 2011-01-01Epub Date: 2010-12-29DOI: 10.1155/2011/683970
Elena V Tchetina
{"title":"Developmental mechanisms in articular cartilage degradation in osteoarthritis.","authors":"Elena V Tchetina","doi":"10.1155/2011/683970","DOIUrl":"https://doi.org/10.1155/2011/683970","url":null,"abstract":"<p><p>Osteoarthritis is the most common arthritic condition, which involves progressive degeneration of articular cartilage. The most recent accomplishments have significantly advanced our understanding on the mechanisms of the disease development and progression. The most intriguing is the growing evidence indicating that extracellular matrix destruction in osteoarthritic articular cartilage resembles that in the hypertrophic zone of fetal growth plate during endochondral ossification. This suggests common regulatory mechanisms of matrix degradation in OA and in the development and can provide new approaches for the treatment of the disease by targeting reparation of chondrocyte phenotype.</p>","PeriodicalId":89323,"journal":{"name":"Arthritis","volume":" ","pages":"683970"},"PeriodicalIF":0.0,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2011/683970","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40123736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}