Arthropathies Flashcards
_____ have increased frequency of Heberden’s and Bouchard’s nodes
Women
_____ hypothesis: HLA-B27 has a propensity to misfold in the ER, leading to a stress response
Unfolded Protein Hypothesis
______ crystals are rhomboid-shaped and ______ bifringent
Calcium pyrophosphate dehyrate (CPPD); positively
______ have more severe osteoarthritis.
Women
______ hypothesis: homodimers of HLA-B27 heavy chains can trigger activation of Natural Killer (NK) cells through killer cell immunoglobulin-like receptors (KIRs)
Free Heavy Chain
______ hypothesis: induction of autoreactivity to self antigens between epitopes of infecting organism/antigen and a portion of the HLA-B27 molecule (or other self peptides)
Molecular Mimicry
______ hypothesis: make RF and anti-CCP antibodies that may lead to production of immune complexes, enhancing local inflammation
B cell
_______ crystals are enedle shaped and ________ bifringent
monosodium urate; negatively
_______ emigrate from circulation under influence of cytokines, IL-8, and TGFb into the synovium
Neutrophils
_______ hypothesis: may recognize citrullinated peptides, or proteoglycan or collagen altered by enzymatic degradation with presentation of neoepitopes
T cell
_______ hypothesis: microbial peptides that bind to HLA-B27 and then are presented uniquely to CTLs to result in disease
Arthritogenic peptides
_______: arthritis, urethritis, inflammatory eye disease, and mucocutaneous lesions
Reiter’s Syndrome
______: decrease uric acid production in over-producers
Xanthine oxidase inhibitors
______: directly opposed to articular cartilage and marginal bone, responsible for most of the joint tissue destruction
Pannus
______: enhances renal excretion of uric acid in under-excreters
Uricosuric
_____: aggregated deposits of monosodium urate crystals occurring in joints, bones, and soft tissue
Tophi
_____: diminished migration, metabolic, and phagocytic activity of PMNs, may block NLRP3 inflammasome activation in monocytes
colchine
____: renal interstitial, glomerular, and/or tubular deposition of MSU crystals
Gouty nephropathy
Ankylosing Spondylitis Specific Therapy Strategies
Back exercises/Good posture; smoking avoidance (to prevent loss of chest wall function)
Bouchard’s nodes are bone swellings of the ____ joints
PIP
Cause of urethritis in reactive arthritis
Chlamydia
Causes of diarrhea in reactive arthritis (4)
Campylobacter, shigella, salmonella, yersinia
Factors affecting Monosodium Urate solubility (5)
Temperature, Dehydration; Trauma, Proteolytic abnormalities, pH
Gout can result from decreased excretion of uric acid due to activation of _____.
URAT1
Gout can result from increased production of uric acid, due to _____ activity of ______ or deficiency of ______.
increased, phosphoribosyl-pyrophosphate synthetase (PRPP); hypoxanthine-guianine phosphoribosyltransferase (HGPRT)
Heberden’s nodes are bone swellings of the ____ joints
DIP
Igs (typically Ig__) that recognize epitopes in _______.
M; the Fc region of IgG
In ankylosing spondylitis, ______ may contribute to development of calcification at entheses and in joint
TGF-beta, WNT proteins, Bone Morphogenic Proteins (BMPs)
In ankylosing spondylitis, the environmental trigger is unknown but thought to be common to all patients, such as________
normal bowel flora
In osteoarthritis, water content _____, proteoglycan content ______, and chondrocyte numer ______.
increases; increases; initially increases then decreases
In Rheumatoid arthritis, the cellular infiltrate into the synovium primarily consists of ______.
mononuclear cells (lymphocytes and monocytes) and fibroblasts
Inflammatory response depends on ______, promoted by IL-8, _______ chemoattractant protein-1, and cytokines (IL-1 and TNF)
PMNs; neutrophil
Lifestyle/Nutritional changes in treating gout (3)
Weight loss; reduction of high purine foods (meat, shellfish) in diet; limitation of fructose and alcohol consumption
MSU crystals engage ________, activating _________ with IL-1β production
caspase-1; NLRP3 inflammasome
Other gene mutations associated with Ankylosing Spondylitis (5)
ERAP1, IL23R, IL-IR2, ANTXR2, Genes associated with TNF pathway
Recognition of MSU crystals by_____ leads to inflammatory response
TLR2/TLR4
The common HLA allele in Ankylosing Spondylitis is _____.
HLA-B27
The common HLA allele in reactive arthritis, psoriatic spondylitis, and colitic spondylitis is _____.
HLA-B27