Block 2 Flashcards
(209 cards)
RF of MS, location
> 37th parallel, most common in scandinavian ancestry
Proposed etiology of MS?
Attack of self-myelin or self-oligodendrocyte antigens
CD4 cells activated in periphery and recognized myelin basic protein
Activated T cells cross BBB and bind to HLA class II molecules of myelin
Where are the lesions found in MS?
Brain, spinal cord, and optic nerves via MRI
What are the T cell subtypes found in MS?
Th1 (pro-inflamm)
Th2 (protective)
Th17 (pro-inflamm)
Treg (protective prevention)
Which matter of the brain can be affected by MS?
Both white and grey matter
What is relapsing remitting type MS (RRMS)?
At onset of new attack that lasts 24hrs, separated by other sx by 30 days followed by remission
First attack of MS is called?
Clinically isolated syndrome
What is secondary progressive type MS?
20% of RRMS pt enter a progressive phase where attacks/remissions are difficult to identify
What is primary progressive type MS (PPMS)?
Occurs in 15% of MS (versus 85 in RRMS)
Slow onset w/o attacks and worsens over time
Increased suicide rate
What is the standard tool for MS diagnosis and progression evaluation?
MRI
What are some favorable/unfavorable prognostic indicators for MS?
Favorable - <40, female, optic neuritis or sensory sx
Unfavorable - >40, male, motor/cerebellar sx
How do you treat acute RRMS?
Acute attack (optic nerve damage)
Tx w/ IV solu-medrol, if they dont respond give plasma exchange
How do you treat RRMS (not acute)?
BARPE
Betaseron (1b) - non-glycosylated
Avanex (1a) - glycosylated
Rebif (1a) - glycosylated
Plegridy (1a) - pegylated
Extavia (1b) - non-glycosylated
Betaseron AE?
Flu-like sx, SOB, tachycardia, depression
Betaseron, Avanex, Rebif, Plegridy are limited due to what?
Neutralizing AB (not dose dependent, but rather time); increases at 6 months, but can develop as early as 3 months
MIGHT be due to number of injections (lower inj = better?)
Glatiramer (Copaxone) aka Copolymer 1 MOA?
Suppresses T cell activation and possibly migration
Mimics myelin basic protein of myelin sheath
Glatiramer (Copaxone) aka Copolymer 1 AE?
10% experience chest tightness, flushing and dyspnea a few min after inj
What is the first oral agent for MS?
Fingolimod (F,Gilenya) + is allowed in PEDIATRICS
Fingolimod MOA?
Acts on S1P1R or S1P5R that is responsible for lymphocyte release from lymphoid organs
Depletes CD4 and 8 in the blood AND doesnt inhibit T or B cells (meaning no immunosuppression or increased risk of infection :O)
any drug that ends w/ -mod
Fingolimod AE?
Decreased HR, decreased lymph count and increased LFT, QT prolongaition
Teriflunomide MOA?
Inhibits dihydroorotate dehydrogenase
Teriflunomide AE?
Monitor LFTs 6 months prior and after, alopecia, and flu
BBW of hepatoxicity and teratogenicity
Which MS rx has interactions?
Teriflunomide
Inhibits CYP2C8 + induces 1At
Inhibits OAT
Decreases INR w/ warfarin use
Dimethyl Fumarate MOA?
Unknown