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Medicinal Chemistry Immunological Drugs
Medicinal Chemistry Immunological Drugs, Mabs, transplant drugs, rheumatoid arthritis
40
Medical
Professional
04/10/2010

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Cards

Term
Hematopoietic Growth Factors
Definition

1. ESA [Erythropoietin Stimulating Agent]

2. G- CSF [Granulocyte Colongy Stimulating Factor]

3. GM-CSF [Gronulocyte Macrophage Colony Stimulating Factor] 

4. Small Molecule antagonist of CXCR4

Term
Epoetin alpha 
Definition

 

  • Trade Name: Epogen or Procrit 
  • Type: ESA 
  • Function: Stimulates Erythropoeisis (rhEPO)
  • Approval Use: Anemia, chronic kidney disease or chronic renal failure, adjunct to chemotherapy, preoperative preparation

Extra Info:

Black box warnings(risk of serious cardiovascular and thromboembolic events)…
Renal failure: Patients experienced greater risks for death and serious cardiovascular events when administered EPO to target higher versus lower hemoglobin levels in clinical studies.  
Adjust the ESA dose to maintain the lowest hemoglobin level necessary to avoid the need for blood transfusions.
Monitor patients’ hemoglobin levels to ensure they do not exceed 12 g/ dL. (Normal = 12-17 g/dL)
Understand that ESAs are given to decrease the chances of receiving transfusions.
Understand that ESAs should not be given to treat the symptoms of anemia, including shortness of breath, dizziness, fatigue, low energy, or poor quality of life. 
Term
Darbepoetin alpha
Definition
  • Trade name:Aranesp
  • Type: ESA 
  • Function: Stimulates erythropoiesis, longer half life (glycosylated- 2 additional N-linked oligosaccharide chains) 
  •  Major Use:Anemia, chronic kidney disease or chronic renal failure, adjunct to chemotherapy, preoperative preparation
Extra Info:
Black box warnings:  (risk of serious cardiovascular and thromboembolicevents)…
Renal failure: Patients experienced greater risks for death and serious cardiovascular events when administered EPO to target higher versus lower hemoglobin levels in clinical studies.  
Adjust the ESA dose to maintain the lowest hemoglobin level necessary to avoid the need for blood transfusions.
Monitor patients’ hemoglobin levels to ensure they do not exceed 12 g/ dL(Normal = 12-17 g/dL)
Understand that ESAs are given to decrease the chances of receiving transfusions.
Understand that ESAs should not be given to treat the symptoms of anemia, including shortness of breath, dizziness, fatigue, low energy, or poor quality of life. 
Term

Methoxy-PEG-epoetin-beta

(PEG=polyethylene glycol) 

Definition

  • Trade name: Micera 
  • Type: ESA
  • Function: stimulates erythropoiesis, longer half life (134 hours) (PEGylated- PEG enhances the stability of the protein). Continuous erythropoietin receptor activator
  •  Major Use:Anemia, chronic kidney disease or chronic renal failure, adjunct to chemotherapy, preoperative preparation. Usually given for anemia in chronic kidney disease though. 
  • Not approved in the US 
Term
Hematide 
Definition

 

  • Trade name: Affymax
  • Type: ESA
  • Function: Same, non-rhEPO PEGylated synthetic dimeric peptide
  •  Major Use: In phase III clinical trials to treat anemia in patients with chronic renal failure. 
  • Hematide™ (Affymax) is a synthetic dimeric peptide-based ESA which is being evaluated for the treatment of anemia in patients with chronic renal failure. It may enter market in 2011

 

Term
Filgrastim
Definition

 

  • Trade name: Neupogen
  • Type: G-CSF (recombinant - human derived)
  • Function: stimulates neutrophil proliferation, differentiation, and migration. 
  •  Major Use: Neutropenia in AIDS or post-chemotherapy or bone-marrow transplantation; severe neutropenia

 

Term
Pegfilgrastim
Definition

 

  • Trade name:Neulasta
  • Type: G-CSF [A covalently linked analog of recombinant G-CSF (filgrastim) and monomethoxypolyethylene glycol (PEG)]
  • Function:Stimulates neutrophil proliferation, differentiation, and migration, but has a longer half life than neupogen 
  •  Major Use: Neutropenia in AIDS or post-chemotherapy or bone-marrow transplantation; severe neutropenia

 

Term
Sargramostim
Definition

 

  • Trade name:Leukine 
  • Type: GM-CSF (recombinant) 
  • Function:Stimulates proliferation and differentiation of neutrophils, eosinophils, and monocytes

  •  Major Use: Following induction chemotherapy in older adults with acute myelogenous leukemia (AML). Before and/or after peripheral blood stem cell transplantation. Mobilizes progenitor cells and helps with myeloid reconstitution after transplant. Protects against infections because it accelerates myeloid recovery, including increases in the number and activity of neutrophils (bacteria protection), monocytes/macrophages (fungi/virus protection) and myeloid-derived dendritic cells (virus protection).  These three key cells provide protection from multiple pathogens
  • This drug shortens the time it takes neutrophils to recover while significantly reducing the number of deaths that would result from infections. 

 

Term
Plerixafor
Definition

 

 

  • Trade name: Mozobil 
  • Type: small molecule antagonist of CXCR4
  • Function: Stem Cell Mobilizer 

     

  •  Major Use: In combination with G-CSF to mobilize HSCs (hematopoetic stem cells) to the peripheral blood for collection and subsequent autologous transplantation in patients with non-Hodgkin’s lymphoma and multiple myeloma.

  •  

    Term
    Infliximab
    Definition

    Trade Name: Remicade

    Type: Chimeric Mab

    Mechanism of Action: TNF-alpha blocker

    Indications: Rheumatoid Arthritis; Plaque Psoriasis; Crohn’s Disease; Psoriatic Arthritis; Ankylosing Spondlyitis; UC-Ulcerative colitis

    Apporoved: 1998

    Other Info

    • 1st in class Mab for RA
    • Given by IV injection

    Term
    Anakinra
    Definition

    Trade Name: Kineret

    Type: recombinant IL-1 protein

    Mechanism of Action: IL-1 receptor antagonist

    Indications: Rheumatoid arthritis 

    Approval: 2001

     

    Term
    Adalimumab
    Definition

    Trade Name: Humira

    Type: Human Mab

    Mechanism of Action: TNF-alpha blocker

    Indications: Rheumatoid Arthritis; Plaque Psoriasis; Crohn’s Disease; Psoriatic Arthritis; Ankylosing Spondlyitis; Juvenile Idopathic Arthritis.

    Approval: 2002

    Other Info: 

     

    • 1st fully Human Mab
    • Taken by injection
    • Half life about 10 -20 days
    • Pre-filled and pre-measured syringe containing 40 mg (0.8 mL) or… Humira pen
    • No mixing, no measuring, no filling
    • Usually injected once every two weeks

     

     

    Term
    Efalizumab
    Definition

    Trade Name: Raptiva

    Type: ---

    Mechanism of Action: ----

    Indications: WITHDRAWN FROM MARKET

    Approval: 2003

     

    Term
    Etanercept
    Definition

    Trade Name: Enbrel

    Type: Infusion Protein

    Mechanism of Action: TNF-alpha blocker

    Indications: Rheumatoid Arthritis; Plaque Psoriasis; Psoriatic Arthritis; Ankylosing SpondlyitisJuvenile IdopathicArthritis

    Approval: 2003

    Other Info: 

     

    • Half life is 3- 5 days
    • This fusion protein is made up of the Fc portion of IgG, and a TNF-a receptor portion (mimics the action of TNF-a receptors on cell surface) , and blocks action of soluble TNF-a.
    • Administered using 25-50mg in a sureclick prefilled autoinjector. 

     

    Term
    Alefacept
    Definition

    Trade Name: Amevive

    Type: Fusion Protein 

    Mechanism of Action: Blocks CD-2 on memory T cells

    Indications: plaque psoriasis 

    Approval: 2003

    Other Info: 

    Memory T cells  (CD4+) are also a predominant cell type in the psoriatic plaque. 
    Alefacept is a fusion protein consisting of the first extracellular domain of LFA-3 (lymphocyte function–associated antigen 3)  fused to the hinge CH2 and CH3 sequences of human IgG1.
    Alefacept binds to CD2 receptors on memory T -cells, and leads to the inhibition of T cell co-stimulation and a reversible reduction of memory T cells
    Consequently inhibits the inflammatory process.
    Additionally, alefacept binds to Fc receptor on natural killer cells and macrophages, resulting in T cell apoptosis (programmed cell death).  

    Alefacept has a slow onset of action, peaking approximately 18 weeks after the first injection of a 12-week course.

    It is associated with long remissions without the need for maintenance therapy

    Its efficacy improves with subsequent courses

    it has a high safety profile.

    Administered IV or IM 

    Term
    Abatacept
    Definition

    Trade Name: Orencia 

    Type: Fusion Protein

    Mechanism of Action: Blocks CD 80/86 on APC

    Indications: Juvenile Idiopathic Arthritis and Rheumatoid Arthritis

    Approval: 2005

    Other Info: 


    T-cell activation requires  several interactions between a T-cell receptor and antigen presenting cell (APC) of which one of the most important is the interaction between CD28 and CD80/CD86.

    • The expression of CTLA4 is up-regulated on the T cell following activation. Binding of CTLA4 to CD80/CD86 provides a control signal that enhances T-cell activation.
    • Abatacept interrupts the interaction between CD80/CD86 and CD28 or CTLA4, prevents T-cell activation and its effects in RA.
    • Overall, this results in the inhibition of downstream effects of TNF-a and  other inflammatory cytokines.

     

    Term
    Certrolizumab pegol
    Definition

    Trade Name: Cimzia 

    Type: Humanized Mab + PEG - NO-Fc

    Mechanism of Action: TNF alpha blocker

    Indications: Chronn's Disease, Rheumatoid Arthritis 

    Approval: 2008

    Other Info: 

    • Cimzia is a humanized Mab that does not contain the Fc portion (only the Fab portion and a segment (CH1) linked to PEG!)
    • Administered SC (monthly dosing after initial therapy)

    Term
    Golimumab
    Definition

    Trade Name: Simponi 

    Type: Human Mab

    Mechanism of Action: TNF-alpha Blocker

    Indications: Ankylosing Spodylitis, Psoriatic Arthritis, Rheumatoid Arthritis 

    Approval: 2009

    Other Info: 

    Simponi is the first anti TNF-a blocker that offers an effective once-monthly treatment option.
    Dose of Simponi is 50 mg by SC  injection once a month (self administered)
    SmartJect autoinjector

    Term
    Ustekinumab 
    Definition

    Trade Name: Stelara 

    Type: Human Mab

    Mechanism of Action: IL-12 and IL-23 blocker

    Indications: Plaque Psoriasis 

    Approval: 2009

    Other Info: 

    • Dual mechanism of action
    • SC every 12 weeks
    • Blocks IL-12 and IL-23 cytokines from binding to respective IL receptors on surface of T-cells.
    • Prevents T-cell signalling (Th1 and Th17 pathways)

    Term
    Tocilizumab
    Definition

    Trade Name: Actemra 

    Type: Humanized Mab

    Mechanism of Action: IL-6 receptor antagonist

    Indications: Rheumatoid Arthritis

    Approval: 2010

    other Info: 

    • IL-6 is essential for regulation of the immune process; however, overproduction of the cytokine leads to inflammation and disease (RA, CD, etc.)
    • As a result, the cytokine must be regulated to control both the magnitude and duration of response.
    • Actemra is an IL-6 RECEPTOR blocker. Does not directly block the cytokine IL-6, but competes for binding on IL-6R
    • Administered IV

    Term
    Muromonab-CD3
    Definition

    Trade Name: Orthoclone OKT3

    Type: Murine Mab (Anti- CD3 Mab) 

    Target: T-cell CD3 receptor

    Indications: Transplant Rejection

    Approved: 1986

    Additional Info: 

    Term
    Daclizumab
    Definition

    Trade Name: Zenapax

    Type: Humanized Mab (anti-IL 2 rMab) 

    Target: IL-2 receptor

    Indications: Transplant Rejection

    Approved: 1997

    Additional Info: 

     

    Bind specifically to IL-2 receptor alpha-subunit on surface of activated T-cells.
    Competitively inhibits IL-2 activation of T-cells, a critical pathway in the cellular immune response in transplant rejection.

    Indicated for induction therapy in patients receiving kidney transplants; used in conjunction with cyclosporine and corticosteroids.
    •Similar in efficacy and safety
    IV administration

     

    Term
    Basiliximab
    Definition

    Trade Name: Simulect

    Type: Chimeric (anti IL-2 rMab)

    Target: IL-2 receptor 

    Indications: Transplant Rejection

    Approved: 1998

    Additional Info: 

    Bind specifically to IL-2 receptor alpha-subunit on surface of activated T-cells.

    Competitively inhibits IL-2 activation of T-cells, a critical pathway in the cellular immune response in transplant rejection.

    Indicated for induction therapy in patients receiving kidney transplants; used in conjunction with cyclosporine and corticosteroids.
    •Similar in efficacy and safety
    IV administration
    Term
    Palivizumab
    Definition

    Trade Name: Synagis

    Type: Humanized Mab

    Target: epitome of the F protein of RSV (epitome means short arm) 

    Indications: Respiratory Syncytial Virus (RSV)

    Approved: 1998

    Additional Info:

     

    • Palivizumab is a IgG1k MAb (humanized) composed of human (95%) and murine (5%) antibody sequences, with a MWT of 148 kDa.
    • Directed to an epitope of the F protein of respiratory syncytial virus (RSV).
    • Exhibits neutralizing and fusion-inhibitory activity against RSV.
    • Indicated for the prevention of serious lower respiratory tract disease caused by RSV in pediatric patients at high risk of RSV disease.
    • Administered Intramuscularly (IM)
    • Protects infants for 30 days/dose

     

     

    Term
    Ranibizumab
    Definition

    Trade Name: Lucentis

    Type: Humanized Mab

    Target: VEGF (Vascular endothelial growth factor -stimulates growth of new blood vessels)

     Indications: Age related Macular Degeneration

    Approved: 2006

    Additional Info: 

     

    • Intravitreal injection once a month (inject the eye!)
    • Cost about 24k per year
    • Efficacy demonstrated in clinical trials vs. sham or PDT (photodynamic therapy)
    • -Unlike bevacizumab, the parent molecule from which it is derived, it is an Ig with a molecular weight of 150 kD, ranibizumab is approximately 33% the weight and size, allowing it to pass through the retina and reach the sub-retinal space where neovascularization occurs.
    • A key difference between pegaptanib and ranibizumabis the number of VEGF-A isoforms each can bind and inhibit. With a binding site at the end of a string of 165 amino acids, pegaptanib easily binds VEGF-Aisoform 165, but not the shorter isoforms 110 and 121. With a more proximal binding site, ranibizumabis able to bind and inhibit all three VEGF-A isoforms. (So lucentis has the ability to knock out otherisoforms giving it a better clinical profile)
    Term
    Natalizumab
    Definition

    Trade Name: Tysabri

    Type: Humanized Mab

    Target: T-cell VLA4 receptor

    Indications: Multiple Sclerosis

    Approved: 2006

    Additional Info: 

     

    • is the first alpha-4 antagonist in the new selective adhesion molecule (SAM) inhibitor class. (It blocks T-cells from entering and gaining access to CNS) The drug is designed to inhibit the migration of T-cells into chronically inflamed tissue of the CNS where they may cause or maintain inflammation. 
    • Natalizumab works by blocking the T-cell surface integrin and preventing immune cells from migrating through blood vessels in the brain to areas of inflammation.
    • Indicated for treatment of RRMS (relapsing remitting multiple sclerosis), slow progression of disease and reduce flare-ups associated with MS.
    • Also indicated for Crohn’s Disease!! Patients with moderately to severely active CD with evidence of inflammation who have had an inadequate response to, or are unable to tolerate, conventional CD therapies and inhibitors of TNF-α.
    • Interaction between the integrin a4b1 and vascular cell adhesion molecule 1 (VCAM1), which is blocked by natalizumab, is important in the entry of leukocytes, including T cells, into the central nervous system. These cells are thought to contribute to the damage of the myelin sheath and possibly the axon through several complex mechanisms.  The damage is specific to a protective barrier around the neurons, it won’t be wide spread 
    • Natalizumab therapy increases the risk of progressive multifocal leukoencephalopathy (PML), an opportunistic viral infection of the brain that usually leads to death or severe disability. This is a fatal condition in the brain. 
    • Was removed from the market because of PML but returned in 2006 with new standards from FDA. 
    • Because of the risk of PML, TYSABRI® is available only through a special restricted distribution program called the TOUCH™ Prescribing Program.  (part of restriction imposed on the drug when it re-entered the market by the FDA)
    • Under the TOUCH™ Prescribing Program, only prescribers, infusion centers, and pharmacies associated with infusion centers registered with the program are able to prescribe, distribute, or infuse the product.
    • In addition, TYSABRI® must be administered only to patients who are enrolled in and meet all the conditions of the TOUCH™ Prescribing Program
    • Cost (12 infusions/year)  30k per year

     

    Term
    Anti-thymocyte Globulin (ATG) 
    Definition

    Trade Name: Thymoglobulin 

    Type: Pab (polyclonal antibody) 

    Target: Ig mediated T-cell Depletion by an unknown mechanism  

    Indications: Induction Therapy of Transplant Patients (immediate, profound immunosuppression for approximately 2 weeks post transplant) 

    Approved: -- 

    Additional Info:

     

    • It is a purified IgG –based polyclonals obtained by immunization of rabbits with human thymocytes.
    • This immunosuppressive product contains cytotoxic antibodies directed against antigens expressed on human T-lymphocytes.
    • In patients, T-cell depletion is usually observed within a day from initiating Thymoglobulin therapy.

     

    Term
    Prednisone
    Definition

    Trade Name: Prednisone 

    Type: small molecule (corticosteroid) 

    Target: Suppress release of IL-1 and IL-6  from APC’s

    (this prevents Tc-cell activation and APC communication)

    [they inhibit NK-beta activation and inflammatory cytokine production] 

    Indications: Maintenance therapy for transplant patients (reduce the immune system's ability to recognize and reject the foreign organ or tissue, while limiting toxicity. This is a lifelong therapy tailored for each patient) 

     Approved

    Additional Info: 

     

    Term
    Methylprednisone
    Definition

     

    Trade Name: Methyl-Prednisone 

    Type: small molecule (corticosteroid) 

    Target: Suppress release of IL-1 and IL-6  from APC’s (this prevents Tc-cell activation and APC communication)

    [they inhibit NK-beta activation and inflammatory cytokine production] Indications: Maintenance therapy for transplant patients (reduce the immune system's ability to recognize and reject the foreign organ or tissue, while limiting toxicity. This is a lifelong therapy tailored for each patient) 

     Approved

    Additional Info: 


     

    Term
    Tacrolimus
    Definition

    Trade Name: Prograf

    Type: Small Molecule (calcineurin inhibitor...cyclosporine is another but it isn't used much at all) 

    Target: Inhibits calcineurin, Blocks production of IL-2 from T-cells.

     Indications: Maintenance Therapy for Transplant patients 

    Approved

    Additional Info: 

     

    Term
    Sirolimus
    Definition

    Trade Name: Rapamune 

    Type: Small Molecule (mTOR inhibitor) 

    Target: Inhibits mTOR; Blocks  IL-2-driven T-cell proliferation 

     Indications: Induction Therapy for Transplant Patients

    Approved -- 

    Additional Info: 

     

    Term
    Microphenolate Mofetil 
    Definition

    Trade Name: Cellcept

    Type: Small Molecule

    Target: Blocks purine synthesis and T-cell proliferation

    Indications: Maintenance therapy for transplant patients 

    Approved: -- 

    Additional Info: 

     

    Term
    Glatiramer Acetate
    Definition

    Trade Name: Copaxone 

    Type: It composed of acetate salts (L-glutamic acid, L-glysine, L-tyrosine, L- lysine) 

    Target: 

    GA is believed to activate T-cells, and thesse GA-specific activated T-cells enter CNS and release ANTIINFLAMMATORY cytokines IL-10 and TGF-b (tumor growth factor beta). They are both involved in the production of anti-inflammatory mediators.
    IL-10 is a potent regulatory cytokine in autoimmunity that inhibits Th1 cells and macrophage activation .
    TGF-b- suppresses cytotoxic T cell response, production of TNF as well as other factors that contribute to myelin damage .

    Hence, the ability of GA-specific infiltrating T-cells to express and induce the formation and release of these potent modulating cytokines may contribute to its therapeutic activity

    Indications: Treatment of Multiple Sclerosis

    Approved

    Additional Info: 

     

    Term
    Albuterol
    Definition

    Trade Name: Proventil, Ventolin, Proair 

    Type: 

     

    • b2-agonists (Short acting)

     

    Target:

     

    • Causes relaxation of the bronchial smooth muscles through stimulation of beta-2-adrenergic receptors. 

     

    Indications

     

    • Bronchodilators (b2-agonists) are the best choice for relieving sudden attacks of asthma and for preventing attacks from being triggered by exercise. THey workTo prevent asthma symptoms while exercising
    • As the main treatment for mild intermittent asthma. These medications also are used to relieve sudden asthma symptoms. They do not control the inflammation 

     

    Approved: -- 

    Additional Info:

     

    • Acts mainly in lung cells and have little effect on other organs, such as the heart. 
    • Start acting within minutes, increasing airflow and making it easier to breathe.  Good for four to six hours.
    • They may be taken orally, inhaled, or injected.

     

     

    Term
    Fluticasone
    Definition

    Trade Name: Flovent 

    Type: long term anti-asthmatic medication

    Target: 

     

    • Corticosteroids resemble natural body hormones which reduce inflammation in the bronchial tubes. They also decrease the mucus made by the bronchial tubes and make breathing easier. (They are meant to block inflammation. Certain steroids can block events very early in T cell activation on a transcription level.)

     

     Indications: 

     

    • When steroids are taken by inhalation for a long period, asthma attacks become less frequent as the airways become less sensitive to allergens

     

    Approved

    Additional Info:

     

    • Usually administered by Metered Dose Inhalers (MDI) or Dry Powder Inhalers (DPI).  Used in combination with other medications.

     

     

    Term
    Zafirlukast and Montelukast
    Definition

    Trade Name: Montelukast - Singulair 

    Type: Leukotriene Modifiers

    Target:

     

    •  inhibit leukotriene receptors, resulting in the reduction of leukotriene-induced bronchoconstriction.
    • They work by counteracting leukotrienes, substances released in the lung that cause the air passages to constrict and promote mucus secretion. Leukotriene pathway modifiers improve lung function and decrease asthma symptoms 

     

    Indications: Asthma (work on inflammation side of the disease) 

    Approved: -- 

    Additional Info: Can be used in combination with steroids 

     

    Term
    Salmeterol and Formeterol
    Definition

    Trade Name: -- 

    Type: Both are Long-acting b2-agonists (bronchodilators)

    Target: :  relax smooth muscle in the bronchial tubes, allowing the tubes to remain open longer and making breathing easier.  Prevent the late phase of bronchoconstriction induced by allergen exposure.

     Indications: long term treatment of bronchospasm during asthma

    Approved: -- 

    Additional Info:

     

    • Long-acting inhaled b2-agonists are indicated for use only by people who are also taking inhaled corticosteroids. They may be used in the following situations:
      • To treat moderate persistent and severe persistent asthma
      • In combination with an inhaled corticosteroid, because they enhance steroids anti-inflammatory action for controlling asthma and preventing asthma attacks
      • These work well to control asthma during exercise and while sleeping

     

     

    Term
    Cromolyn Sodium or Nedocromil Sodium
    Definition

    Trade Name: --

    Type: Mast Cell Stabilizer 

    Target:  

     

    • Target Mast Cells
    • These medications can prevent attacks when given before exercise or when exposure to an allergen cannot be avoided. Regular use of cromolyn improves lung function and the ability to exercise. Peak expiratory flow rates are improved, and the need for short-acting b2-agonists is decreased.

     

    Indications: Long term care of asthma 

    Approved

    Additional Info: 

     

    • Initially used in children as a long term treatment to prevent asthma attacks. 
    • These are safe drugs but are expensive, and must be taken regularly even if there are no symptoms!
    • These medications have few side effects but many patients complain of the taste. Nausea, vomiting, and diarrhea occur, as seen in other medications, but these symptoms are rare

     

     

    Term
    Omalizumab
    Definition

     

    Trade Name: Xolair
    Type: Monoclonal Antibody (Humanized Mab that binds to IgE) 
    Target: This is an anti-IgE antibody. An antibody that inhibits an antibody. Inhibits the amount of IgE binding to Mast cells, basophils, and eosinophils. It binds to IgE which decreases the cell bound IgE in blood, decreases expression of high affinity receptors, decreases the release of soluble mediators, thus it decreases inflammation and asthma symptoms. 

     Indications:Moderate/severe allergic asthma whose symptoms not controlled by inhaled steroids. You have to have been on inhaled steroids before you go on this biologic product. It is not used for actute attacks but should be used prophylacticallybecause you can’t wait until T-cells are produced.
    Extra Info
    • Not used for acute attacks.
    • 150 to 375 mg SC/ every 2 to 4 weeks (Not self-injectable)
    • Expensive:  $10k to 12k per year

     

    Term
    Pegaptanib Sodium
    Definition

    Trade Name: Macugen

    Target:anti-VEGF inhibitor approved by the FDA

    Indication: the treatment of Wet Age-Related Macular Degeneration. ("wet" means there is abnormal growth or development of vasculature in the eye that causes a degradation of visual acuity ) 

    Additional Info:

     

    • Aptamers are RNA or DNA molecules selected in vitro from vast populations of random sequence that recognize specific ligands. They fold up into unique 3-D structures, allowing them to bind specifically to proteins, like VEGF.
    • Binding to VEGF prevents angiogenesis, or stimulation of blood vessel formation and prevention of vascular permeability (leaky vessels), in WET but not DRY macular degeneration.
    • A key difference between pegaptanib and ranibizumab is the number of VEGF-A isoforms each can bind and inhibit. With a binding site at the end of a string of 165 amino acids, pegaptanib easily binds VEGF-A isoform 165, but not the shorter isoforms 110 and 121. With a more proximal binding site, ranibizumab is able to bind and inhibit all three VEGF-A isoforms. (So lucentis has the ability to knock out other isoforms giving it a better clinical profile)
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