Author(s): David A. Fox, M.D., 2009License: Unless otherwise noted, this material is made available under the terms of the...
Citation Key                          for more information see: http://open.umich.edu/wiki/CitationPolicyUse + Share + Ada...
Rheumatoid Arthritis/Pathogenesis and Clinical Presentation of Joint  Inflammation and Destruction  M2 Musculoskeletal Seq...
Reading AssignmentPrimer on the Rheumatic Diseases, 13th editionChapter 6A, pp 114-121Chapter 6B, pp. 122-132Optional in-d...
Source Undetermined
NB is a 71-year old woman who was diagnosed withrheumatoid arthritis in 1977, involving the hands, wrists,elbows, shoulder...
Rheumatoid Arthritis: 1987 Revised             Diagnostic CriteriaPatients must have 4 of 7 criteria:!  *Morning stiffness...
Factors Useful for Differentiating Early RA from Osteoarthrosis                              (Osteoarthritis)             ...
Causes of Chronic Inflammatory Polyarthritis              (a partial list)    •  Rheumatoid arthritis       "    Systemic ...
Specific Joint Involvement in PolyarthritisJoints Involved            Common With                            Rare InTempor...
Synovial Fluid Leukocyte Count                    (x103)Condition              0     1    2   4     8     16    32     64 ...
Clinical Spectrum of RAJ. Cush, 2002. (All images)
PIP swellingSource Undetermined
PIP nodules, MCP swelling/subluxationSource Undetermined
Boutoniere deformity of the fingersSource Undetermined
Ulnar deviation, MCPs of right handSource Undetermined
Extensor tendon synovitis leading to    rupture of extensor tendons Source Undetermined
Thenar atrophy from wrist synovitis and median             nerve compression      Source Undetermined
MTP deformitiesSource Undetermined
MTP subluxation with plantar ulceration Source Undetermined
Development of bone erosionSource Undetermined
Radiographic Evaluation of Arthritis 1.  Soft tissue swelling 2.  Periarticular demineralization 3.  Articular erosions 4....
Radiographic Features of Rheumatoid      Arthritis and Osteoarthritis in the HandRheumatoid Arthritis                  Rad...
MTP erosionsSource Undetermined
End-stage RASource Undetermined
Source Undetermined
Source Undetermined
Source Undetermined
Pannus eroding cartilage and boneSource Undetermined
Hypothesis for the Cause of RASynoviocyte transformation, synoviocyte interactionwith macrophages, cartilage and boneCellu...
Microbial Organisms Proposed as    Possible Triggers for RABacterial   gram positive cocci            mycobacteria        ...
D. Fox
Genetic Susceptibility"  Familial aggregation and twin studies suggest that   genetics may play a role in the development ...
Hypothesis for the Cause of RASynoviocyte transformation, synoviocyte interactionwith macrophages, cartilage and boneCellu...
Autoantibodies in Rheumatoid Arthritis "  rheumatoid factor (RF) "  anti-nuclear antibodiesanti-type II collagen "  anti-t...
Source Undetermined
Rheumatoid Factor-Evidence for a Role in the Pathogenesis of RA "  Most patients with RA have elevated levels of rheumatoi...
Occurrence of Rheumatoid Factor in Various DiseasesIgM Rheumatoid Factor                         Rheumatoid FactorFrequent...
Anti-CCP and RA"  CCP = cyclic citrullinated peptides"  Arginine      PADI                           citrulline"  PADI = p...
Risk Factors for RA"  Genetic     "    MHC Class II alleles     "    Multiple other genes"  Environmental     "    ? infec...
Relative Risk of seropositive RA in Individuals              with Different SE Genotype          16RR        15          1...
Predicting RA Before  its Clinical Onset   "    Genes   "    Smoking   "    Anti-CCP
Hypothesis for the Cause of RASynoviocyte transformation, synoviocyte interactionwith macrophages, cartilage and boneCellu...
Evidence for a Central Role                  for T cells in RA1.  Large numbers of T cells an antigen-presenting cells are...
Proposed Antigenic Targets for T cells in RAMicrobial antigens            AutoantigensSuperantigens, such as        Collag...
RA a Th-17 disease?"  IL-17 is found in abundance in arthritic joints and serum"  Administration of IL-17 worsens CIA (col...
IL-17"  17 kD cytokine"  Secreted by activated and memory T cells,   recently defined as a distinct Th subset"  Six isofor...
IL-23 and IL-17"  IL-23 is a cytokine made by APC s"  IL-23 and IL-12 are both heterodimers"  IL-23 and IL-12 share an ide...
T-Helper Cell DifferentiationChristina M Tato an dJohn J. O Shea, Nature 441, 11 May 2006
Hypothesis for the Cause of RASynoviocyte transformation, synoviocyte interactionwith macrophages, cartilage and boneCellu...
Image of cell-cell interactions in   rheumatoidarthritis removed
Cell-cell Interactions in RA Synovium       Leukocyte endothelial       T cell dendritic cell       T cell macrophage     ...
Source Undetermined
Source Undetermined
Cytokines"  Intercellular messenger molecules"  Synthesis    •  Heterogeneity of cell types    •  Inducible"  Effects    •...
Role of Cytokines and Cytokine   Inhibitors in Chronic Inflammation                                                       ...
Synthesis and Actions of TNF                             TNF!"Macrophageor activatedT-cell                                ...
Key Actions Attributed to TNF         Macrophages # Pro-inflammatory cytokines                        # chemokines        ...
Monocyte                                                     secretes                                                     ...
Actions of IL 1 and Endogenous IL 1Ra                 Image of IL-1                  interactions                    remov...
Role of Interleukin 1 in RA"  Pro-inflammatory cytokine"  Triggers production of other proinflammatory   cytokines, includ...
TNF and IL!1 Play a Critical Role in                     Osteoclast Differentiation         Proliferation              Dif...
RANKL:OPG and the Rate of Progression of Joint Destruction in RA•  RANKL promotes joint   destruction                     ...
Role of Cytokines in Rheumatoid Arthritis Synovium           Producing                        Target Cells              Ce...
Source Undetermined   Source Undetermined
Additional Source Information                        for more information see: http://open.umich.edu/wiki/CitationPolicySl...
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12.01.08(a): Rheumatoid Arthritis/Pathogenesis and Clinical Presentation of Joint Inflammation and Destructio

  1. 1. Author(s): David A. Fox, M.D., 2009License: Unless otherwise noted, this material is made available under the terms of theCreative Commons Attribution – Non-Commercial 3.0 License:http://creativecommons.org/licenses/by-nc/3.0/We have reviewed this material in accordance with U.S. Copyright Law and have tried to maximize your ability to use,share, and adapt it. The citation key on the following slide provides information about how you may share and adapt thismaterial.Copyright holders of content included in this material should contact open.michigan@umich.edu with any questions,corrections, or clarification regarding the use of content.For more information about how to cite these materials visit http://open.umich.edu/education/about/terms-of-use.Any medical information in this material is intended to inform and educate and is not a tool for self-diagnosis or a replacementfor medical evaluation, advice, diagnosis or treatment by a healthcare professional. Please speak to your physician if you havequestions about your medical condition.Viewer discretion is advised: Some medical content is graphic and may not be suitable for all viewers.
  2. 2. Citation Key for more information see: http://open.umich.edu/wiki/CitationPolicyUse + Share + Adapt { Content the copyright holder, author, or law permits you to use, share and adapt. } Public Domain – Government: Works that are produced by the U.S. Government. (17 USC § 105) Public Domain – Expired: Works that are no longer protected due to an expired copyright term. Public Domain – Self Dedicated: Works that a copyright holder has dedicated to the public domain. Creative Commons – Zero Waiver Creative Commons – Attribution License Creative Commons – Attribution Share Alike License Creative Commons – Attribution Noncommercial License Creative Commons – Attribution Noncommercial Share Alike License GNU – Free Documentation LicenseMake Your Own Assessment { Content Open.Michigan believes can be used, shared, and adapted because it is ineligible for copyright. } Public Domain – Ineligible: Works that are ineligible for copyright protection in the U.S. (17 USC § 102(b)) *laws in your jurisdiction may differ { Content Open.Michigan has used under a Fair Use determination. } Fair Use: Use of works that is determined to be Fair consistent with the U.S. Copyright Act. (17 USC § 107) *laws in your jurisdiction may differ Our determination DOES NOT mean that all uses of this 3rd-party content are Fair Uses and we DO NOT guarantee that your use of the content is Fair. To use this content you should do your own independent analysis to determine whether or not your use will be Fair.
  3. 3. Rheumatoid Arthritis/Pathogenesis and Clinical Presentation of Joint Inflammation and Destruction M2 Musculoskeletal Sequence Fall 2008 David A. Fox, M.D.
  4. 4. Reading AssignmentPrimer on the Rheumatic Diseases, 13th editionChapter 6A, pp 114-121Chapter 6B, pp. 122-132Optional in-depth readingArthritis and Allied Conditions – A textbook of Rheumatology, WJ Koopman, Ed.Chapter 52, pp. 1089-1115, 15th EditionLearning Objectives1. Understand how to distinguish rheumatoid arthritis (RA) from other forms of arthritis, such as osteoarthritis.2. Understand the main clinical features of RA in the joints.3. Understand the major theories concerning the cause of RA.4. Understand mechanisms of tissue destruction in the RA joint.5. Understand the role of TNF (tumor necrosis factor) and other key cytokines in RA.NOTE: The lecture will include interaction with a patient who has had RA for 29 years, and demonstration of some changes that RA can cause in the joints – material that is not included in this handout. The first half hour will focus on an interview with the patient, including opportunities for the students to ask questions.
  5. 5. Source Undetermined
  6. 6. NB is a 71-year old woman who was diagnosed withrheumatoid arthritis in 1977, involving the hands, wrists,elbows, shoulders, feet and eventually cervical spine.Family history is notable for autoimmune disease affectingboth of the patient s daughters, one with rheumatoidarthritis and the other with systemic lupus. During thefirst ten years of her illness medical treatment includedsalicylates, non-steroidals, intramuscular gold, oral goldand prednisone. Methotrexate was first administered in1989 and her initial visit at the University of Michigan wasin 1993. Due to the rheumatoid arthritis the patient hadto retire from her position as a high school Englishteacher.
  7. 7. Rheumatoid Arthritis: 1987 Revised Diagnostic CriteriaPatients must have 4 of 7 criteria:!  *Morning stiffness lasting at least 1 hour!  *Simultaneous arthritis of 3 or more joints!  *Arthritis of hand joints!  *Symmetrical arthritis!  Rheumatoid nodules!  Abnormal serum rheumatoid factor!  Typical changes on PA x-ray film of hand and wrist* Must persist for at least 6 weeks Patients may also have another rheumatic disease so long as RA criteria are met. RA no longer to be designated classical, definite, or probable. Adapted from Arnett FC, Edworthy SM, Bloch DA, et al: Arthritis Rheum 1988; 31:319.
  8. 8. Factors Useful for Differentiating Early RA from Osteoarthrosis (Osteoarthritis) RA OsteoarthrosisAge of onset Usually age 20-65 Increases with age peak incidence in 50 sPredisposing factors HLA-DR4 Trauma, obesity (OA of the knee), congenital abnormalities (e.g., shallow acetabulum)Symptoms, early Morning stiffness Pain increases through the day and with useJoints involved Hands (metacarpophalangeal , Distal interphalangeal joints proximal interphalangeal joints) (Heberden s nodes), proximal wrists, elbows, shoulders, interphalangeal joints hips, knees, ankles, feet (Bouchard s nodes), weight- cervical spine. The thoracic bearing joints (hips, knees), spine, lumbar spine and distal spine (any region). interphalangeal joints of the hand are almost never affected.Physical findings Soft tissue swelling, warmth, Bony osteophytes, minimal deformities soft tissue swelling earlyRadiographic findings Periarticular osteopenia, Subchondral sclerosis, marginal erosions osteophytes, cartilage lossLaboratory findings Increased erythrocyte Normal sedimentation rate: rheumatoid factor, anemia, thrombocytosis, hypoalbuminemia
  9. 9. Causes of Chronic Inflammatory Polyarthritis (a partial list) •  Rheumatoid arthritis "  Systemic rheumatic disease •  Systemic lupus •  Scleroderma •  Polymyositis •  Vasculitis "  Spondylarthropathies •  Ankylosing spondylitis •  Reiter’s syndrome "  Psoriatic arthritis "  Gout "  Pseudogout "  Rheumatic fever "  Juvenile rheumatoid arthritis
  10. 10. Specific Joint Involvement in PolyarthritisJoints Involved Common With Rare InTemporomandibular Rheumatoid arthritis, juvenile Gout rheumatoid arthritisLarynx (crico-arytenoid) Rheumatoid arthritis All otherElbows, wrists,metacarpophalangeals Any synovitis OsteoarthritisDistal interphalangeal Osteoarthritis, psoriatic arthritis Rheumatoid arthritisjoints (hand)Hips Osteoarthritis, rheumatoid Gout arthritisCervical spine Rheumatoid arthritis, juvenile Gout rheumatoid arthritis, psoriasis, osteoarthritis, spondyoarthropathiesThoracolumbar spine Spondyloarthropathies: Gout, Ankylosing spondylitis Rheumatoid Arthritis Psoriatic arthritis Reiter s syndrome Inflammatory bowel disease-associated arthritis Osteoarthritis
  11. 11. Synovial Fluid Leukocyte Count (x103)Condition 0 1 2 4 8 16 32 64 128 PUSNormal xxxOsteoarthritis xxxxxxxxRheumatoid arthritis xxxxxxxxxxxxxxxxxxxxxxxxxxxxxJuvenile rheumatoid xxxxxxxxxxxxxxxxxxxxxxxxxxxxx arthritisGout xxxxxxxxxxxxxxxxxxxxxxSeptic arthritis xxxxxxxxxxxxxxxxxxx
  12. 12. Clinical Spectrum of RAJ. Cush, 2002. (All images)
  13. 13. PIP swellingSource Undetermined
  14. 14. PIP nodules, MCP swelling/subluxationSource Undetermined
  15. 15. Boutoniere deformity of the fingersSource Undetermined
  16. 16. Ulnar deviation, MCPs of right handSource Undetermined
  17. 17. Extensor tendon synovitis leading to rupture of extensor tendons Source Undetermined
  18. 18. Thenar atrophy from wrist synovitis and median nerve compression Source Undetermined
  19. 19. MTP deformitiesSource Undetermined
  20. 20. MTP subluxation with plantar ulceration Source Undetermined
  21. 21. Development of bone erosionSource Undetermined
  22. 22. Radiographic Evaluation of Arthritis 1.  Soft tissue swelling 2.  Periarticular demineralization 3.  Articular erosions 4.  Reactive bone formation 5.  Joint narrowing 6.  Joint deformity 7.  Distribution of involvement
  23. 23. Radiographic Features of Rheumatoid Arthritis and Osteoarthritis in the HandRheumatoid Arthritis Radiograhic Findings Osteoarthritisprominent, fusiform soft tissue swelling mild, focalprominent, early periarticular demineralization not presentsurface, pocketed or cystic articular erosions occasionally, cysticminimal reactive bone formation prominent osteophytosis and subchondral sclerosismid to late, uniform joint narrowing early, irregularlate, subluxations an ddislocations joint deformity early, mild subluxationwrists, metacarpophalangeal and distribution of involvement distal interphalangeal, proximalproximal interphalangeal joints interphalangeal and 1st carpometacarpal jointsearly, asymmetric and non- asymetric and non-uniformuniformlate, symmetric and uniform
  24. 24. MTP erosionsSource Undetermined
  25. 25. End-stage RASource Undetermined
  26. 26. Source Undetermined
  27. 27. Source Undetermined
  28. 28. Source Undetermined
  29. 29. Pannus eroding cartilage and boneSource Undetermined
  30. 30. Hypothesis for the Cause of RASynoviocyte transformation, synoviocyte interactionwith macrophages, cartilage and boneCellular immune mechanisms(T cells, cytokines, monocytesHumoral immune mechanisms(RF, immune complexes,complement)Infection 1920 1940 1960 1980 2000
  31. 31. Microbial Organisms Proposed as Possible Triggers for RABacterial gram positive cocci mycobacteria proteus E. coli mycoplasmaViral Epstein-Barr virus parvovirus retroviruses cytomegalovirus rubella human herpes virus 6
  32. 32. D. Fox
  33. 33. Genetic Susceptibility"  Familial aggregation and twin studies suggest that genetics may play a role in the development of RA"  Multiple genes involved"  In many populations (excluding most southern Europeans), approximately 80% of patients with RA share a common amino acid sequence in HLA-DR4 molecules (QKRAA) (shared epitope hypothesis)"  The presence of multiple copies of QKRAA may also predict disease severity"  Several non-MHC loci identified, all related to cellular immune responses
  34. 34. Hypothesis for the Cause of RASynoviocyte transformation, synoviocyte interactionwith macrophages, cartilage and boneCellular immune mechanisms(T cells, cytokines, monocytesHumoral immune mechanisms(RF, immune complexes,complement)Infection 1920 1940 1960 1980 2000
  35. 35. Autoantibodies in Rheumatoid Arthritis "  rheumatoid factor (RF) "  anti-nuclear antibodiesanti-type II collagen "  anti-type IX collagen "  anti-cardiolipin "  anti-neutrophil cytoplasmic antibodies "  anti-keratin antibodies "  anti-perinuclear factor "  anti-calpastatin "  anti-citrullinated peptides (anti-CCP)
  36. 36. Source Undetermined
  37. 37. Rheumatoid Factor-Evidence for a Role in the Pathogenesis of RA "  Most patients with RA have elevated levels of rheumatoid factor "  High titers of rheumatoid factor correlate with severe articular disease and with development of extra-articular manifestations. "  Pre-existing elevations of rheumatoid factor predict subsequent development of RA. "  Rheumatoid factor production is prominent in RA synovial tissue, and such rheumatoid factors show evidence of antigen-driven affinity maturation. "  Rheumatoid factor can enhance formation of pathogenic immune complexes. "  B cells bearing surface rheumatoid factor can trap antigens contained in immune complexes and present them to primed T cells.
  38. 38. Occurrence of Rheumatoid Factor in Various DiseasesIgM Rheumatoid Factor Rheumatoid FactorFrequently Present Usually AbsentRheumatic diseases Osteoarthritis Ankylosing spondylitisRheumatoid arthritis GoutSjogren s syndrome (with or with arthritis) ChondrocalcinosisSystemic lupus erythematosus Suppurative arthritisProgressive systemic sclerosis Psoriatic arthritisPolymyositis/dermatomyositis Enteropathic arthritisCryoglobulinemia Reiter s syndromeInfectious diseases IgM Rheumatoid Factor Frequently PresentBacterial endocarditisTuberculosis Noninfectious diseasesSyphillisInfectious hepatitis Normal aged individualsLeprosy Diffuse interstitial pulmonary fibrosisSchistosomiasis Cirrhosis of liver, chronic active hepatitis Sarcoidosis Waldenstrom s macroglobulinemia
  39. 39. Anti-CCP and RA"  CCP = cyclic citrullinated peptides"  Arginine PADI citrulline"  PADI = peptidyl arginine deiminase"  Citrullinated proteins abundant in inflamed synovium"  Smoking citrullination of proteins in the lung
  40. 40. Risk Factors for RA"  Genetic "  MHC Class II alleles "  Multiple other genes"  Environmental "  ? infection "  smoking
  41. 41. Relative Risk of seropositive RA in Individuals with Different SE Genotype 16RR 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Current smokers No SE genes Never smokers Single SE gene Double SE gene Never smokers Current smokers Source: Padyukov, Silva, Stolt, Alfredsson, Klareskog; A&R 2004;50:3085-92 D. Fox
  42. 42. Predicting RA Before its Clinical Onset "  Genes "  Smoking "  Anti-CCP
  43. 43. Hypothesis for the Cause of RASynoviocyte transformation, synoviocyte interactionwith macrophages, cartilage and boneCellular immune mechanisms(T cells, cytokines, monocytesHumoral immune mechanisms(RF, immune complexes,complement)Infection 1920 1940 1960 1980 2000
  44. 44. Evidence for a Central Role for T cells in RA1.  Large numbers of T cells an antigen-presenting cells are present in synovial tissue and fluid.2.  Synovial T cells express activation and memory makers.3.  T cell subsets and possibly clonal T cell populations, accumulate in RA joints in a non-random manner.4.  RA is associated with specific MHC class II alleles (DR and/or DQ).5.  RA is associated with a polymorphism at PTPN22, a tyrosine phosphatase that regulates signaling through the T cell receptor.6.  T cell-directed therapeutic interventions may be effective in RA, and are clearly effective in animal models.7.  T cell cytokines, such as IL-17, that are present in RA joints, mediate biologic effects highly relevant to the pathogenesis of joint inflammation and damage.
  45. 45. Proposed Antigenic Targets for T cells in RAMicrobial antigens AutoantigensSuperantigens, such as Collagen (Type II and other types) staphylococcal toxins gp39Epstein-Barr virus antigens Cartilage link proteinHeat shock proteins Cartilage proteoglycanMycobacterial antigens 205kDa synovial fluid antigensParvovirus antigens Immunoglobulin binding protein (BiP)Peptidoglycan from Heat shock proteins gram+ bacteria Class II MHC (shared epitope) IgG (Fc portion) RA33 (heterogeneous nuclear ribonucleoprotein A2) Filaggrin Glycosaminoglycans
  46. 46. RA a Th-17 disease?"  IL-17 is found in abundance in arthritic joints and serum"  Administration of IL-17 worsens CIA (collagen-induced arthritis, an animal model of RA)"  IL-17 R and IL-17 knockout mice develop less severe arthritis"  Neutralizing antibody to IL-17 reduces severity of CIA"  IL-23 deficient mice develop less severe arthritis"  Recent human study shows IL-17 and TNF mRNA in RA synovium predict aggressive disease
  47. 47. IL-17"  17 kD cytokine"  Secreted by activated and memory T cells, recently defined as a distinct Th subset"  Six isoforms, termed IL-17 A-F"  IL-17 = IL-17A"  Induced by IL-6 and TGF
  48. 48. IL-23 and IL-17"  IL-23 is a cytokine made by APC s"  IL-23 and IL-12 are both heterodimers"  IL-23 and IL-12 share an identical p40 subunit"  IL-23 also contains a p19 subunit, IL-12 a p35 subunit"  IL-12 induces gamma-interferon"  IL-23 induces IL-17"  Co-stimulatory signals can also induce IL-17 when TCR is triggered
  49. 49. T-Helper Cell DifferentiationChristina M Tato an dJohn J. O Shea, Nature 441, 11 May 2006
  50. 50. Hypothesis for the Cause of RASynoviocyte transformation, synoviocyte interactionwith macrophages, cartilage and boneCellular immune mechanisms(T cells, cytokines, monocytesHumoral immune mechanisms(RF, immune complexes,complement)Infection 1920 1940 1960 1980 2000
  51. 51. Image of cell-cell interactions in rheumatoidarthritis removed
  52. 52. Cell-cell Interactions in RA Synovium Leukocyte endothelial T cell dendritic cell T cell macrophage Macrophage fibroblast T cell fibroblast B cell fibroblast
  53. 53. Source Undetermined
  54. 54. Source Undetermined
  55. 55. Cytokines"  Intercellular messenger molecules"  Synthesis •  Heterogeneity of cell types •  Inducible"  Effects •  Primarily local (systemic when produced in abundance) •  Mediated through "  Cell-associated receptors on target cells "  Intracellular signaling and gene transcription"  Regulation controlled at many steps "  Message induction "  Soluble receptors "  Soluble receptor antagonists
  56. 56. Role of Cytokines and Cytokine Inhibitors in Chronic Inflammation IL-1 Soluble TNF Receptor Receptor IL-10 Antagonist TNF! IL-1 Pro-inflammatory Anti-inflammatoryAdapted with permission from Feldmann M et al. Cell. 1996:85:307-310.
  57. 57. Synthesis and Actions of TNF TNF!"Macrophageor activatedT-cell Induction of mediators" TNF ! receptor" Target cell" Source Undetermined
  58. 58. Key Actions Attributed to TNF Macrophages # Pro-inflammatory cytokines # chemokines Increased inflammation Endothelium # Adhesion molecules Increased cell infiltrationTNF # Vascular endothelial growth factor (VEGF) Increased angiogenesis Increased Hepatocytes # Acute phase response CRP in serum Articular Synoviocytes # Metalloproteinase synthesis cartilage degradation Osteoclast Progenitors # RANKL expression Bone erosionsD. Fox
  59. 59. Monocyte secretes Monocyte Osteoclast activates activates ODF TNFEndothelial Cell elaborates activates secretes Surface activates activates Adhesion IL-1 Molecules Synovial Fibroblast T-cell attacks cartilage Matrix secretes metalloproteases IL-8 prostaglandin E2 IL-6 Helps stimulate migration through endothelium into synovial tissue Adherence of T-cells and monocytes from circulation Source Undetermined
  60. 60. Actions of IL 1 and Endogenous IL 1Ra Image of IL-1 interactions removed Source of original image: Dinarello CA. N Engl J Med. 2000;343:733.
  61. 61. Role of Interleukin 1 in RA"  Pro-inflammatory cytokine"  Triggers production of other proinflammatory cytokines, including TNF"  Causes T cell/neutrophil accumulation in synovium by inducing expression of endothelial adhesion molecules"  Stimulates production of collagenase and stromelysin"  Stimulates osteoclast differentiation through intermediary TNF family cytokine, RANKL Source: Bresnihan and Cunnane. Rheum Dis Clin North Am. 1998;24:615-628.
  62. 62. TNF and IL!1 Play a Critical Role in Osteoclast Differentiation Proliferation Differentiation Survival & Fusion ActivationCFU-M Cells of monocytes/ Prefusion Multinucleated Activated macrophage lineages osteoclasts osteoclasts osteoclasts (pOCs) M-CSF CTR (-) M-CSF TNF CTR (+) IL-1 CTR (+) TRAP (-) + CTR (+) TRAP (+) TRAP (+) M-CSF TNF RANKL TRAP (+) RANKL Ruffled Ruffled IL-1 border (-) border (+) D. Fox
  63. 63. RANKL:OPG and the Rate of Progression of Joint Destruction in RA•  RANKL promotes joint destruction 10•  OPG ameliorates RANKL-induced (Sharp units/ Radiographic progression 8 destruction of joints year) 6•  The RANKL:OPG ratio correlates well with the rate 4 Low of joint destruction 2•  In RA osteoclasts destroy bone 0 High while synovial fibroblasts High Low destroy cartilage RANKL Geusens P, et al. Arthritis Rheum. 2003;48(suppl):5458 [Abstract 1145].
  64. 64. Role of Cytokines in Rheumatoid Arthritis Synovium Producing Target Cells Cells Synovial Synovial Macrophages Macrophages T and/or T and/orCytokine cells Fibroblasts cells Fibroblasts OtherIL-1 + ++ + + osteoclastTNF! + ++ + + endotheliumIL-6 +/- + + - hepatocyte, chondrocyteIL-8 +/- + +/- - neutrophilIL-15 - + + - -IL-17 + - - + -
  65. 65. Source Undetermined Source Undetermined
  66. 66. Additional Source Information for more information see: http://open.umich.edu/wiki/CitationPolicySlide 5: Source UndeterminedSlide 12: J. Cush, 2002. (All images)Slide 13: Source UndeterminedSlide 14: Source UndeterminedSlide 15: Source UndeterminedSlide 16: Source UndeterminedSlide 17: Source UndeterminedSlide 18: Source UndeterminedSlide 19: Source UndeterminedSlide 20: Source UndeterminedSlide 21: Source UndeterminedSlide 24: Source UndeterminedSlide 25: Source UndeterminedSlide 26: Source UndeterminedSlide 27: Source UndeterminedSlide 28: Source UndeterminedSlide 29: Source UndeterminedSlide 32: David FoxSlide 36: Source UndeterminedSlide 41: David FoxSlide 49: Christina M Tato an dJohn J. O Shea, Nature 441, 11 May 2006Slide 53: Source UndeterminedSlide 54: Source UndeterminedSlide 56: Adapted with permission from Feldmann M et al. Cell. 1996:85:307-310.Slide 57: Source UndeterminedSlide 58: David FoxSlide 59: Source UndeterminedSlide 62: David FoxSlide 63: Geusens P, et al. Arthritis Rheum. 2003;48(suppl):5458 [Abstract 1145].Slide 65: Sources Undetermined

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