CTD Flashcards
pathogenesis of SLE
loss of immune regulation increased and defective apoptosis nuclear material act as autoantigens B and T cells stimulated autoantibodies produced
what kidney problems can occur in SLE
Glomerulonephritis
how might glomerulonephritis due to SLE present
Proteinuria Urine sediments Urine RBC and casts Hypertension Acute renal failure Chronic renal failure
investigations for SLE
FBC U&Es CRP, ESR Complement levels Renal function tests
Anti-nuclear antibody (ANA)
Anti-double stranded DNA antibodies (dsDNA)
Extractable nuclear antigens (ENA) - Anti-Sm, Anti-RNP, Anti-RO
why does a positive ANA not mean it is SLE
it is found in other conditions
e.g. RA, HIV, Hep C
when should a positive ANA be taken seriously
when other anti-nuclear antibodies are positive Anti-dsDNA Anti-Sm Anti-Ro Anti-RNP
what antibody is highly specific for SLE
Anti-double stranded DNA antibody (Anti-dsDNA)
what is Anti-Ro associated with
anti-la
Cutaneous manifestations
secondary sjogre’s features
congenital heart block
which antibody is high specific for SLE and associated with neurological involvement
Anti-Sm
which antibody in SLE correlates with activity
Anti-dsDNA
SLE general management
lifestyle changes
dietary advice, smoking cessation, sun protection, and exercise
SLE drug treatment
NSAIDs - normally Naproxen
Analgesia
When NSAID ineffective;
Anti-malarial - hydroxychloroquine
what is used in SLE when NSAIDs and hydroxychloroquine ineffective
steroids
what is the last line of treatment for SLE
immunosuppressives
e.g. Azathioprine, Methotrextae
cons of immunosuppressies
All can cause bone marrow suppression
All can cause increased susceptibility to infection
Potentially teratogenic
what do patients with SLE die of
Infection
CV disease
what are key features of anti-phospholipid syndrome
Hx of 1 or more episodes of venous, arterial, or microvascular thrombosis
Hx of pregnancy loss
Hx of pregnancy-associated morbidity e.g. pre-eclampsia