Immunosuppressants Flashcards
Antithymocyte globulin drug class
Polyclonal IgG
Muromanab-CD3 class
co-stimulatory molecules
Belatacept class
co-stimulatory molecules
Daclizumab drug class
CD25 inhibitors
Basiliximab drug class
CD25 inhibitors
Alemtuzumab drug class
CD52 inhibitors
Cyclosporine class
Calcineurin inhibitors
Tacrolimus drug class
Calcineurin inhibitors
Pimecrolimus drug class
Calcineurin inhibitors
Methylprednisolone drug class
Steroids/nuclear transcription inhibitors
Mycophenolate mofetil class
cell cycle disruptors
Azathioprine class
cell cycle disruptors
Methotrexate class
cell cycle disruptors
Cyclophosphamide class
cell cycle disruptors
Name some drug classes used for maintenance transplant therapy
Calcineurin inhibitors, anti-proliferatives, steroids
What is the order of transplant organs to generate a rejection response?
Lung > heart > kidney > liver
Describe organ responses to immunopharmacologic agents
Renal - very good; heart - good; liver - fair; bone marrow - good
Describe common issues for antibody immunosuppressants
1) Opportunistic infections; 2) Need anti-infective prophylaxis; 3) Malignancy/LPD; 4) Cytokine-release syndrome
Muromanab target
CD3
Belatacept target
CD80/86 (B7)
CD25 is also known as
IL-2 receptor
Daclizumab target
Il-2 receptor (CD25)
Basiliximab target
IL-2 receptor (CD25)
Alemtuzumab target
CD52
Cyclosporine target
Cyclophilin
Tacrolimus target
FKBP12
Sirolimus target
FKBP12
Sirolimus class
mTOR inhibitors
Mycophenolate target
inosine monophosphate dehydrogenase
Azathioprine target
Metabolite blocks DNA synthesis and induces apoptosis
Methotrexate target
Dihydrofolate reductase
If lactating, the patient should avoid these immunosuppressants
Cyclophosphamide; methotrexate; azathioprine; tacrolimus; cyclosporine
Globulin immunosuppressants are all lymphocyte depleting, except for this class of them (give drug members)
CD25 inhibitors Daclizumab and Basilixiumab
Calcineurin inhibitors MOA
Inhibit first phase of T cell activation (IL-2 and IL-4 production)
mTOR inhibitors MOA
Inhibits 2nd phase of T-cell activation; prevents B-cell differentiation and decreases IgM, IgG, IgA
Cyclosporine MOA
Binds to cyclophilin and together inhibits calcineurin which is required for IL-2 transcription
Tacrolimus MOA
Binds to FKBP12 (similar to cyclophiln) which is required for IL-2 transcription
Calcineurin inhibitors side effects
Nephrotoxicity; hypertension; secondary malignancies
Sirolimus MOA
Binds FKBP12 and together complexes with mTOR (whereas cyclosporine binds with calcineurin)
Sirolimus side effects
Hyperlipidemia; thrombo-problems; azotemia; drug target is expressed widely so variety of problems
Azathioprine side effects
Bone marrow suppression; secondary malignancies; avoid if lactating; lowers INR (Warfarin complication)
How does azathioprine work?
It’s a purine analog so it inhibits DNA replication and RNA production, selectively in lymphocytes for the most part
Mycophenolate mofetil MOA
Metabolite is a nucleotide analog that inhibits DNA/RNA synthesis by halting G-MP production; more selective for lymphocytes than azathioprine so it is preferred over it now
Mycophenolate mofetil side effects
GI issues (diarrhea; N/V; abdominal pain…)
These drugs are used to treat acute rejection
Antithymocyte globulin; muromanab; methylprednisolone
Muromonab MOA
Binds to CD3 (TCR signal transduction unit) and destroys T-cell activity
These mABs can cause cytokine release upon infusion
Muromonab and Alemtuzumab (so watch for anaphylaxis)
Daclizumab and Basiliximab MOA
Bind to IL-2 receptor
This drug is used to prevent immune responses from coronary stents
Sirolimus
Methylprednisolone/corticosteroids MOA
Inhibits transcription of pro-inflammatory factors esp. IL-2 by binding to cytosolic receptors, translocating to nucleus, and inhibit HAT (histone acetyltransferase) directly and by activating HDAC to reverse acetylation (of these pro-inflamm genes)
What does mTOR normally do?
Part of clonal expansion pathway downstream from IL-2 receptor stimulation
Alemtuzumab MOA
Anti-CD52 antibody targets T-cell for antibody/complement destruction
Atgam MOA
Polyclonal IgG opsonizes human T-cells for complement destruction
Atgam generic name
Anti-thymocyte globulin (polyclonal IgG anti-T-cell)
Corticosteroids side effects
Cell-surface receptor targets -> rapid neurological issues (insomnia, depression); protein metabolism issues (impaired wound healing, stunted growth); susceptibility to infection (esp TB); hypercholesterolemia; thromboembolism; hypercorticism; aggravation of DM
mTOR inhibitor side effects
Stunts proliferation of other cell types, inc. smooth muscle cell, hepatocyte, fibroblast bc mTOR is widely expressed in body