Module 3 Flashcards
What are the two types of immunity?
There is natural immunity also called innate/native and specific acquired immunity
Which type of immunity involves physical barriers such as skin, phagocytic cells, and natural killer cells and occur before exposure and respond non specifically?
Innate or natural immunity
Which type of immunity occurs after exposure to foreign substance and becomes more rapid and intense?
Specific acquired immunity
What is an antigen?
A foreign substance
What are two types of specific required immunity?
Cell mediated immunity and antibody mediated/humoral immunity
Which immunity involves antibodies?
Humoral immunity
What cells make antibodies?
B lymphocytes or B cells
All these cells are made from bone marrow
Lymphocytes (b cells, cytolytic t cells, helper T cells) , macrophages, dendritic cell
Which type of cells are attacked and HIV and AIDS patients?
Helper T cells
Which cells release factors that promote type 4 sensitivity reactions— delayed hypersensitivity reactions?
Helper T cells, CD4 cells
What are immune related actions of macrophages?
- are antigen presenting cells which promotes proliferation and differentiation of helper T cells and cytotoxic T cells
- involved in delayed type 4 hypersensitivity reaction (they are the final mediators)
- phagocytize cells tagged with antibodies
What are the two antigen presenting cells?
Macrophages and dendritic cells
Mast cells are derived from what cell?
Basophils
What sells involved in the immediate hypersensitivity reaction?
Mast cells
Neutrophils of ourselves I have been tag with antibodies of what immunoglobulin class?
IgG
Also mediate inflammation and phagocytize bacteria
Eosinophils attack and destroy foreign particles That have been coated with which antibody class?
IgE
What cells usually target helminiths or parasitic worms?
Eosinophils
Which cells are involved in immediate hypersensitivity?
Mast cells,
Basophils, and eosinophils
What are the five classes of antibodies?
IgA, IgD, IgE, IgG, IgM
Name this antibody:
Located in mucous membranes of GI tract and lungs, in secretions. Serves as first line defense against microbes. Transferred to infants via breast milk, not absorbed from the GI tract but protects the infant against microbes in the GI tract
IgA
Name this antibody:
Found on surface of Mature B cells
Serves as a receptor for antigen recognition along with igM
IgD
Name this antibody :
Binds to surface of Mast cells; stimulates release of histamine and other mediators of mast cells
Binds to parasitic worms to help to Lyse the worms
IgE
Name this antibody:
Promotes target cell lysis; transferred across placenta to fetal circulation providing neonatal immunity; it is the major antibody in blood
IgG
Name this antibody:
First antibody that is produced in response to an antigen, present on nature B cells
Works with IgD and serves as antigen recognition
IgM
The discrimination between self and nonself is made possible by what?
By the major histocompatibility complex molecules
When the histocompatibility complex fails, what results?
When the disability discriminate between self and non-self fails, or immune system attacks her own cells
Autoimmune disease
MHC class I
Where are they found?
Who do they help imitate immune response?
Found on mostly all cells except Rbcs
can initiate responses by presenting antigens to cytotoxic T cells
MHC class 2 Where are they found cancer
Who do they help initiate an immune response ?
Found on B cells and antigen presenting cells (macrophages and dendritic cells)
Initiate immune response by presenting antigen to helper T cells
What antigens (2) Can antibodies neutralize without help?
Bacterial toxins and viruses
What is opsonization?
It is antibodies’ way of promoting phagocytosis of resistant bacteria
by providing a handle for phagocytes to “grab”
Most of the anybody’s the act as a
Opsonins belong to what antibodies class?
IgG
What are the actions of histamine?
5 actions
Vasculature (2), lungs, stomach, CNS
Dilate small blood vessels, Produces smooth muscle construction in the lung, Stimulates the secretion of acid, acts as a neurotransmitter
Histamine is synthesized in what two cells?
Mast cells and basophils
Where are mast cells present in the body?
In the skin and soft tissues
Where are basophils present in the body?
In the blood
What immunoglobulin antibody class is involved in allergic release?
IgE
To have an allergic reaction and you have to have a prior exposure
True or false
True
For a non-allergic release of histamine, what type of agents can act directly on my cells to trigger a histamine release?
Remember no prior sensitization is needed, so injury can also cause direct release
Certain drugs, radio contrast media, plasma expanders
H1 antagonists or blockers Are used to treat what disorder?
It is used for the treatment of mild allergic disorders
What is the big difference between H1 antagonists in the first generation from the 2nd generation?
First generation anti-histamines are highly sedating and second generation anti-histamines aren’t that sedating
Does H1 blockers Block the release of histamine from mast cells or basophils?
They do not block
Anti-histamines are really effective when given before an allergic reaction occurs it can take them a while to control the signs and symptoms when there is an allergic reaction occurring
Overdosing with anti-histamines Can produce what?
It can produce CNS stimulation and seizures frequently result
What is the most common side effect of an anti-histamine?
Sedation
The degree of impairment is the same when anti-histamine equals that when alcohol level exceeds the legal limit
Patient should avoid alcohol and other CNS depressants which will intensify the depressant effects of the H1 antagonist
What can be done for patients who have daytime sedation While taking an H1 antagonist?
Daytime sedation can be minimized by administering the entire daily dose at night
Which generation of anti-histamines have a low solubility, can’t cross the blood brain barrier, and a low affinity to type H1 receptors found in the brain?
Second generation anti-histamines
Which generation of anti-histamines have a hi lipid solubility, can cross the blood brain barrier, and have a high affinity for H1 receptors of the CNS?
First generation antihistamines
In regards to antihistamines, what population can have a paradoxical side effect Which can result in insomnia, nervousness tremors and even seizures?
Older patients are sensitive to these actions.
Children can have CNS stimulation after an overdose
What similar anticholinergic effects does H1 antagonist possess?
It can produce drying of mucous membranes or dry mouth, Urinary hesitancy, constipation and palpitations
Which generation is anti-cholinergic affects more common in among the anti-histamines?
First generation antihistamines
What is the black box warning for promethazine or Phenergan?
What population is it contraindicated in?
What generation of histamine is this drug in?
It can cause severe respiratory depression
Should not be used in Children younger than two years old
It is a first generation H1 blocker
Can antihistamines be used during pregnancy? When should they be avoided?
Anti-histamines should only be used when clearly necessary and
Should be avoided in late third trimester Because newborns are sensitive to the adverse effects of these drugs
Are anti-histamines excreted in the milk and should they be avoided by women who are breast-feeding?
Yes they are excreted in the milk posing a risk to the nursing infant and Should be avoided by women who are breast-feeding because it can interfere with milk production
What is fexofenadine’s brand name?
Allegra
Certain fruit juices such as apple, orange, grapefruit juice can reduce fexofenadine’s absorption, To ensure proper absorption patient should do what?
Patient should not drink fruit juices within four hours before dosing or One or two hours after dosing
For antihistamines, who are high risk patients?
Treating young children, older adults and patients with conditions that may be aggravated by the muscarinic blockade which include asthma, urinary retention, open angle glaucoma and prostatic hypertrophy
What’s special to know about alkylamines?
Brompheniramine, chloroheniramine, and dexchlorpheniramine
They are first generation H1 anti-histamines antagonists and are the least sedating among.
Diphenhydramine and Clemastine are apart of what 1st generating agents of H1 antihistamine blockers?
Ethanolamines
Cetirizine, levocetrizine, fexofenadine, Loratadine, and desloratadine are also of what generation of H1 blockers?
2nd generation (nonsedating) agents
What is the main difference between seasonal allergic rhinitis also called a fever and perennial Allergic rhinitis?
Seasonal rhinitis occurs and reaction to outdoor allergens like pollen, weeds grasses, and trees.
Perennial or nonseasonal allergic Granados is triggered by indoor allergens that you can’t get away from such as house dust, Dogs, cat dander, roaches etc.
What is the most effective drug for prevention and treatment of seasonal and perennial allergic Rhinitis?
What do these drugs do?
Intranasal glucocorticoids are the most effective drugs for prevention and treatment of season one perennial rhinitis
These drugs can prevent or suppress the major signs and symptoms of allergic rhinitis such as rhinorrhea, congestion, sneezing ,nasal itching, and erythema
What three medications are available without prescription that are intranasal glucocorticoids?
Budesonide (rhinocort aqua), fluticasone propionate(Flonase), and triamvinolone (nasocort allergy 24 hrs)
For patients using intranasal glucocorticoids, patients with seasonal allergic rhinitis will start seeing effects in how much time versus a patient who has perennial allergic rhinitis?
For Patients with Seasonal allergic rhinitis it can take up to one week or more to see an initial responses though can be seen in hours,
for a patient with perennial allergic rhinitis, it can take 2 to 3 weeks to develop because they are more congested and it’s a continuous year round thing for them
Oral histamines and intranasal glucocorticoids are effective therapy for first line drugs for allergic rhinitis
Oral histamines differ by how
Oral histamines are more effective when taking prophylactically and are less helpful after s/s appear.
Oral histamines don’t relieve nasal congestion!! Which makes them less effective than glucocorticoids
Which class of drugs used to treat allergic rhinitis has no adverse effects but is moderately effective but extremely safe?
Cromolyn
Or intranasal cromolyn sodium