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Contraindications for Live attenuated vaccination?
- Immunocompromised patients should not receive live vaccinations.
- Pregnancy
- hypersensitivity to any component of vaccine
- Precautions: persons with moderate or severe acute illness with or without fever.
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Innate immunity
natural bodies defense-Skin, mucous membranes, cilia in airways, lyosozymes
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Humoral immunity
- hematopoietic stem cell in bone marrow creates all cells.
- Non specific defenses: innate immunity: generalized protective mechanisms-example inflammation to contain infection.
- specific defenses: Humoral immunity: B cells secrete specific antibodies to specific antigens
- Memory B-cells will remember antigens.
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Immunomodulators: Immunostimulants? BRM-biologic response modifiers and others.
- BRM
- Vaccines
- interferon alpha 2B /Intron A
- aldesleukin IL2
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Immunomodulators: Immunosuppressants: MAB-monoclonal antibodies and others
- steroidal anti-inflammatory: prednisone
- Calcineurin inhibitor: cyclosporine/sandimmune
- cytotoxic agents: azathioprine/imuran
- MAB antibodies: infliximab
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Vaccine types?
- Attenuated live vaccines: Microbes weakened unable to cause disease (MMR)
- Inactivated killed vaccines: microbes inactivated by heat or chemicals, boosters often necessary. (Influenza)
- Toxiods: Contain inactivated bacterial toxins-incapable of causing disease. (Diphtheria & tetanus)
- subunit (recombinant): contain partial organism or microbial proteins. (Hep B)
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Hepatitis B Vaccine (engerix-B, recombivax-B)
- primary use: prevention of Hep B
- Preg: C
- MOA:Conveys active immunity-stimulates endogenous antibodies-long lasting.
- Contraindications: hypersensitivity
- Caution: avoid vaccinating during active infections
- Adverse effects: pain and inflammation at injection site, transient fever, fatigue.
- antibody response lower in persons >60 years
- reduced response with concurrent use of immunosuppressants.
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IFN alpha-2B (Intron A)
BRM
Alpha interferons have the greatest clinical utility. Also have many severe SE.
- Therapeutic class: antiviral, antineoplastic, Immunostimulant
- Preg: C
- MOA: Produced by infected lymphocytes & macrophages»Attach to nearby cells stimulating production of protective antiviral proteins»“Warn” surrounding cells that infection has occurred-suppresses cancer growth, increased phagocytosis, enhanced immune response.
- Indications: Hairy cell leukemia, malignant melanoma, non-hodgkin, HPV, aids related to kaposi sarcoma, chronic hep b/c
- Contraindications: hypersensitivity, autoimmune hep, not for use with infants and neonates causes brain damage.
- Caution
: fever/active infection, compromised cardiopulmonary system, elevated LFP (Liver function panel) may need D/C, herpes zoster recent exposure to chickenpox. - Adverse: Flulike symptoms >50%, neurotoxic-severe depression, aggression, SI, Cardiotoxic, GI-Anorexia/N/V, neutropenia, thrombocytopenia.
- Monitor: Blood work each month hydration status=2500+, CBC, LFT, renal function, assess flu symptoms, daily body weight, oral cavity.
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Interferon Beta can treat?
MS
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Atopy?
- an Exaggerated IgE-mediated immune response: Type 1 hypersensitivity
- Four types.
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cyclosporine (Sandimmune)
calcineurin inhibitor
- Therapeutic class: calcineurin inhibitor, immunesuppressant
- Preg: C
- Alert: Do not eat grapefruit-juice with medication, Do not breast feed with medication, practice good oral hygiene.
- MOA: reduces activity of the immune system, interferes with the activity and growth of T-cells.
- Indications: prevention of transplant rejection, psoriasis, chronic immune urticaria, other autoimmune.
- Contraindications: hypersensitivity, active infection
- Adverse: acute headache, unusual hair growth, mouth sores, n/v, abd pain, muscle pain, weight gain.
- Interactions: Many with drugs and herbs.
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Type 1: Immune-hypersensitivityn
- IgE mediated hypersensitivity
- inflammatory response can range from uncomfortable or life threatening.
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Type II: immune hypersensitvity
- Antibody dependent cytotoxic hypersensitivity
- hyperacute graft rejection of organ transplant
- hashimoto thyroiditis is an example
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Type III: immune hypersensitvity
- Immune complex disease: leads to antibodies attaching to tissue causing inflammation and scarring.
- Acute transplant rejection
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Type IV: immune hypersensitivity
- Delayed hypersensitvity
- T-cell mediated
- contact dermatitis
- chronic transplant rejection
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corticosteroids
Anti-inflammatory
Exogenous glucocorticoids are much higher than what our body produces. affects almost every aspect of immune response.
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Prednisone (Deltasone)
Masks infections and lowers resistant to infections.
- Therapeutic class: Corticosteroid
- Preg: C
- Alert: Must tapper off when used for longer than 10 days.
- MOA: Metabolized to an active form of glucocorticoid, suppresses renal function, suppresses inflammatory response
- Indications: inflammation, neoplasia, asthma, arthritis, used for short and long term inflammation.
- Contraindications: active infections,
- Adverse: Longterm-Mood changes, cushings, hyperglycemia, osteoporosis
- Interactions: decreases efficacy of anti-seizure meds, increased GI toxicity with nsaid/ASA. many interactions.
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Tissue and organ transplant typing?
- Human leukocyte antigen: HLA
- ABO type antigens
- Autograft: transplant of tissue to the same person
- Isograft: transplant from a donor to a genetically identical recipient
- allograft: transplant between two genetically non-identical members of same species.
- xenograft: transplant from different species.
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imuran (Azathioprine)
purine synthesis inhibitor
- Therapeutic class: immunosuppressant
- Preg: D
- MOA: inhibits T-cell and B-cell proliferation
- Indications: prophylaxis of kidney transplant rejection, severe rheumatoid arthritis, other inflammatory disorders (off-label),
- Contraindications: hypersensitivity, pregnancy, caution with pre-existing hematological disease, hepatic impairment, recent exposure to chicken pox.
- Adverse: Liver toxicity, n/v, neutropenia, fatigue, joint pain, diarrhea
- Interactions: Allopurinal-increases SE, ACE inhibitor- severe leukopenia, Warfarin- reduced blood level of drug.
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Cytokines
- regulators of host response to inflammation, infection, trauma, immune response.
- Proinflammatory cytokines make disease worse-interleukin 1 (IL 1), tumor necrosis factor (TNF)
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infliximab (Remicade)
Immunosuppressant
- Therapeutic class: MAB, TNF-inhibitor,
- Preg: B
- MOA: TNF blocker, Chimeric monoclonal antibody-binds to TNF receptors on synovial cells. delaying disease process
- Indications: moderate to severe Rheumatoid arthritis and chrons.
- Contraindications: active infection, hypersensitivity, TB, HF
- Cation: Active infections, MS, renal or hepatic impairment, immunosuppression, elderly.
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zidovudine (Retrovir, AZT)
Nucleoside reverse transcriptase inhibitor (NRTI)
- Therapeutic class: antiretroviral
- Preg: C
- MOA: As the reverse transcriptase enzyme begins to synthesize viral DNA, it mistakenly uses zidovudine as one of the nucleosides, creating a defective DNA strand.
- Indications: used for HIV, postexposure prophylaxis in health care workers, also for mother prior to birth to decrease the chances of the baby receiving the disease.
- Contraindications: hypersensitivity, suppresses bone marrow function, hematologic toxicity,
- Adverse: fatigue, malaise, anorexia, n/v, diarrhea, headache is prevalent. Rare cases of lactic acidosis.
- Interactions: many, inerferon alfa, dapsone, flucystosine, vincristine should be avoided due to cumulative immunosuppression.
- Labs: MCV may increase during therapy. may also cause neutropenia.
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efavirenz (Sustiva)
nonnucleoside reverse transcriptase inhibitor
- Therapeutic class: antiretroviral
- Preg: C
- MOA: inhibits reverse transcriptase, can penetrate the CSF, preferred drug for initial therapy of HIV infection.
- indications: HIV
- Contraindications: known teratogen to animals-must not be given to pregnant patients.
- Adverse: 50% of patients experience CNS adverse effects (sleep disorders, nightmares, dizziness, reduced concentration, delusions-these deminish after 3-4 weeks of treatment. can also causes rashes, bone marrow suppression. decreases seizure threshold
- interactions: LFT, may effect wafarin levels
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lopinavir with ritonavir (Kalestra)
protease inhibitor
- Therapeutic class: Antiretroviral
- Preg: C
- MOA: Block viral enzyme protease which is responsible for the final assembly of HIV virions.
- Indications: HIV
- Contraindications: patients
- Adverse: diarrhea, headache, GI related effects, n/v, vomiting, dyspepsia(indigestion), DM.
- Interactions: lopinavir is extensively metabolized by hepatic enzymes. Statins should not be administered with this drug due to myopathies. Many interactions increased Adverse effects with SSRI, and other antidepressants.
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