Diabetes Drugs Flashcards
What are the criterion for diagnosing Diabetes?
A1C>or = 6.5%
Fasting glucose of > or = 126mg/DL
Plasma glucose>or = 200mg/dL
What is the pathophysiology of Type 1 Diabetes?
No functional insulin secreting pancreatic B-Cells. (Insulin dependent) Age of onset= 12 yrs
Type 2 diabets is normally associated with____________ and has a ___________ association.
- Obesity
2. Family history
How does Hyperlipidemia occur in diabetes?
Increased fatty acid mobilization from fat cells and increased fatty acid oxidation=====> Ketoacidosis.
Name 5 complications of diabetes
- Micro and macro angiopathies
- Neuropathy (Increased utilization of the polyol pathway (Aldose reductase)
- Nephropathy
- Ocular
- Increased infections.
What effect does hyperglycemia have on proteins?
Oxidation products of glucose react reversibly with proteins to form Advanced Glycation End-productsroducts (AGE)
What is Methylglyoxal?
It is an AGE precursur that inhibits vasorelaxation stimilated by ACh/NO
What is the role of the Alpha subunit of the insuline receptor?
It is the regulatory unit of the receptor. It represses the catalytic activity of the Beta subunit. Repression is relieved by insulin binding.
What is the role of the Beta subunit on the Insulin receptor?
It contains tyrosine-kinase catalytic domains. (Autophosphorylation)
Outline the cellular signaling mechanism for lipogenesis on insulin binding to a cell.
Insulin binds====> Autophosphorylation of heat shock proteins===>MAPK activation===> Lipogenesis
Outline the cellular signaling mechanism for Glycolysis on insulin binding to a cell.
Induline binds=====> Autophosphorylation====>PI3K====>PDK1=====>PKB====> glycolysis
What does insulin do to liver, muscle and Fat cells on binding?
Increases expression of GLUT receptors.
What GLUT receptor is located on Skeletal Muscle?
GLUT4
What GLUT receptor is located on Adipose tissue?
GLUT4
What GLUT receptor is located in the liver?
GLUT2
What effects does insulin have on the liver?
Inhibits: Glycohenolysis, Ketogenesis, Gluconeogenesis
Stimulates: Glycogen synthesis, Triglyceride synthesis.
What effect does insulin have on skeletal muscle?
Stimulates: Glucose transport, amino acid transport
What effect insulin have on Adipose tissue?
Stimulates: Triglyceride storage, glucose transport
What effect doe insulin have on free fatty acids in the blood?
It decreases serum FFA: Decreased FFAs enchance insulin action on skeletal muscle, reduce hepatic glucose production.
Glut 1 is expressed _______________
Constitutively and in every damn tissue one would say it is the #1 GLUT!
GLUT 2 is expressed_____________
Constitutively and is expressed in B-cells, and Liver.
GLUT 3 is expressed in the ______________
Constitutively and in neurons.
GLUT 4 is expressed in the _______________
It is insulin induced!!!!Skeletal muscle and adipose tissue.
Whaich of these GLUT receptors has the highest Km?
GLUT2
What do the A cells of the Islet of Langerhans cells secrete?
Glucagon
What do the D cells of the Islet of Langerhans cells secrete?
Somatostatin
What do the B cells of the Islet of Langerhans cells secrete?
Insulin and Amylin
What is the role of glucagon?
Stimulate glycogen breakdown.
What does somatostatin do?
General inhibitor of secretion
What does insulin do?
Stimulates uptake and utilization of glucose.
What does Amylin do?
- Co-secreted with insulin and:
1. Slows gastric emptying
2. Decreases food intake
3. Inhibits glucagon secretion.
How id insulin synthesized?
As a single peptide and deposited in secretory granules where it is cleaved into A, B, and C (Connecting) peptide.
Name two recombinant human insulins?
Humulin
Novolin
What are the Ultra rapid onset/Very short action insulins?
Lispro, Aspart, Glulisine (they certainsly don’t LAG behind)
Name the rapid onset/Short action Insulin
Regular insulin (“R”apid “R”egular)
Name one intermediate onset/action insulin
NPH
Name three Slow Onset/Long action insulins
Glargine, Detemir, Degludee (Slow is GooDD)-Yes this may be a dirty joke
NPH Insuline (N)= Nautral Protamine Hagedorn
Has Protamine as an insoluble complex, tissue proteases cleave insulin off…..this increases it’s absorption and duration of action
Lispro is a _________acting insulin
Ultra-rapid/Short duration (USe immediately before meals
Insuline Aspart is a _____________acting insulin
Ultra-rapid/Short duration (Use immediately before meals)
Insulin Glulisine is a _____________acting insulin.
Ultra-rapid/Short duration (Use immediately before meals)
Insulin Glargine is a_____________acting insulin
Slow onset/ Slow release (24hrs duration 1X a day)
Insulin Detemir is a ________________acting insulin
slow onset/ Slow release Insulin. It binds albumin serum extensively!
Degludec
slow onset/ Slow release Insulin. Binds albumin extensively. (the DD’s love albumin)
When are the fast onset, short acting insulins taken
Before meals
When are the long/Intermediate acting insulins taken?
At bedtime and after breakfast
Humalog what is it?
A mixed fast-onset and long acting insulin
How are insulins administered?
Sub Q, Insulin infusion pump. (Buffered regular, Lyspro, Aspart, Glulisine), IV for severe hyperglycemia or ketoacedosis.
Which insulin can you inhale?
Afrezza (it’s a powder)-Contraindicated in pats with COPD as may reduce lung function (FEV)
Insulin is used to treat…..
- Type 1 diabetics
- Pts w/ ketosis and hyperosmolar coma
- Some type 2 diabetics
What 3 actions does insulin have in the body?
Decrease liver glucose output
Increase fat storage
Increase glucose uptake
What are the adverse effects of insulin?
Hypoglycemia (Too much insulin/not enough food)
Some symptoms of hypoglycemia include…..
Weakness, Sweating, Hunger, Tachycardia, Increased irritability, tremor, blurred vision, seizures, coma, increased sympathetic output.
How is hypoglycemia treated?
Give them some damn glucose or glucagon.
What are some other adverse reactions to insulin?
Lipodystrophy
Lipoatrophy
Insulin resistance (immune response)
Name some agents that increase blood glucose in diabetics
Catecholamines, Glucocorticoids, oral conraceptives, thyroid hormone, calcitonin, Somatropin, Isoniazid, phenothiazides, morphine.
Agents that may increase risk for insulin hypoglycemia
ETHANOL! ACE inhibitors, fluoxetine, MAO inhibitors, anabolic steroids, B-adrenergic blockers.
How do you manage type 2 diabetes?
Diet+Exercise
Diet+Exersise+oral antidiabetic drugs and or GLP-1 Analogs
How do you manage type 1 diabetes?
Insulin+ Diet+ Exercise