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64 Cards in this Set

  • Front
  • Back

What does aspirin not affect?

PT and aPTT

Endocrine system

odd organ system


None are usually connected


secrete hormones to excite target cells

Pancreas

made up of 2 types of secretory tissues, which reflect the dual function.


Exocrine(digestive enzymes) and endocrine

Endocrine cell


-another name


-types of cells


-amount

pancreatic islets (Islets of Langerhans)




Alpha cells produce glucagon (20%)




Beta cells produce insulin (75%)

Discuss the pathway for insulin release

90 BG > eat > increase BG > stimulate Beta cells > release insulin > insulin receptors in the liver where glucose is stored > BG decreases and insulin release does the same.

Discuss the pathway for glucagon release

90 bg > decrease in BG > Alpha cells stimulated to release glucagon > breaks down glycogen through glycogenolysis > increase in BG

What lvls correlate directly with insulin lvls?

Glucose lvls

What are the four types of diabetes?

Type 1 - insulin dependent


-generally autoimmune. 80-90% functioning beta cells are lost.-fatigue


-develop diabetic ketoacidosis -polydipsia, polyphagia, polyuria, wt loss


Type 2 - non-insulin dependent


-metabolic syndrome, less insulin, increased resistance to insulin


Type 3 - other causes of BG


Type 4 - Gestational


-7%, hormones block

Type 2 Diabetes

Treat via diet and exercise and medication




Clinical manifestations: recurrent infections, vision problems, neuropathy, dehydration(nonketotic hyperosmolar coma), nephropathy.

Polyol pathway

type 2 diabetes where it hold onto sorbitol and fructose, which will increase intracellular osmotic pressure.

What is the microvascular disease caused by?

Glycosilation

What are the ways to DX diabetes?

Fasting Blood glucose


-fasting, then given orange syrup(1 time)




Glucose tolerance test


-draw labs for a 3 hours period

How will you be able to monitor how well diabteics are sticking to the regimen?

Glucose POC, self monitoring




Hemogloblin A1C


-shows long term

Diabetes Insipidus

Nothing to do with Insulin


insufficiency with ADH(polyuria, polydipsia)


Neurogenic(not enough) and nephrogenic(not responding to)

How do beta cells make insulin?

1st preproinsulin


proinsulin


insulin(activated in granules)

What is the C-peptide in insulin?

No function connects alpha and beta (active forms of insulin)

What insulin can we use, if we don't like recombinent?

Porcine




only one amino acid off.

GLUT2 transporters

Important in that it has a low affinity, so the glucose will not go into beta cells so readily, if that were to occur, then the beta cells would constantly be releasing insulin.

When GLUT2 allows glucose in the cell, what happens?

Metabolism increases > ATP increases > K channel ATP sensitive close in excess amounts of ATP > current increases to depolarization > Ca++ opens up and exocytosis of insulin occurs.

What is the insulin receptor?

It is a tyrosine kinase receptor




dimer that sets off a phosphorylation cascade.




for membrane translocation of GLUT, increase glycogen formation, and activation of transcription factors

GLUT 1, 3, 4, 5

membrane translocation of GLUT

GLUT1

Brain and RBC

GLUT 4

only one with intermediate affinity of glucose




=5




Muscle and adipose

GLUT 1 3 5 are

high affinity transporters

What are the 4 main effects of insulin?

-Increase glucose absorption into all the cells of the body


-Promote glucose stores as glycogen


-Inhibits glycogenolysis


-Inhibits conversation of fatty acids and amino acids to ketones

Rapid Acting Insulin

lispro, aspart, glulisine

Short Acting Insulin(Regular)

Novolin, humulin

Intermeadiate Acting Insulin

Neutral Protamine Hagedorn, isophan

Long Acting Insulin

Glargine, detemir

Insulin dosing

some people want the low basal rate and give short acting for meals, others want less injections, so they take the 70/30.

Insulin delivery

SQ injections


Portable pens


Conintuous SQ insulin infusion


-sterile change Q 2-3 days


-Best for tight insulin control




Inject where fat is!

Intensive Insulin regimen

IIDM: tight control




Need basal and bolus


-sliding scale(illness increases the dose)`

What is the complication of treatment for those with Diabetes?

Hypoglycemia


anxiety, blurred vision, palpitations, shakiness, slurred speech, sweating


Treat: give sugar or glucagon

Biguanines

Metformin


1st line therapy(with meals)


Reduces hepatic production of glucose

Insulin Secretagogues

Stimulate the release of insulin by binding to K+ ATP sensitive channels.




Oldest class - sulfonylureas (Increased cardio mortality rate)


Meglitinides(shorter duration of action)

Thiazolidinediones

Decreases insulin resistance and increases insulin signal transduction.




Increase risk for MI




Had an access program, but you had to know it increases risk for MI

Alpha-Glucosidase Inhibitors

Block digestion of complex carbohydrates




good for pre-diabtics




GI effects: flatulence, diarhhea, and ABD pain

Bile Acid Binding resins

Large cation exchange resins-not absorbed that bind to cholesterol and surround it.


Bind bile acids-prevent reabsorption


GI upset

Hyperglucagonemia

Excess glucagon because of pts taking insulin or meds that increase insulin.

Symlin (Amylin)

Released by beta cells to suppress glucagon release.


Need to use with insulin


Decreases circulating glucose

GLP-1

Increases insulin, decreases glucagon


GI hormone


pancreatic cancer risk

Januvia

DDP-4 antagonist


found in gila monster saliva


Incretine therapy


Gi hormone

Gliflozins

SGLT2 inhibitor


SGLT2 (Proximal convoluted tubule: filter out 180 G, and 90% reabsorbed in distal segment) More glucose goes out into the urine. Osmotic diuretic.


Wt loss, dehydration, increase in urethral infections


What the combination therapy steps?

1. Biguanide


2. Biguanide + insulin OR Secretagogue


3. Biguanide + 2-3 other classes


4. Intensive Insulin Therapy

What is the first measure of taking care of Diabetics?

Eat right and exercise and check your feet and eyes

Sterols

Precursors to cholesterol


can be found in animals and plants


Need for many functions in the body.

cholesterol

we eat and make it through the mevalonate pathway.

cholesterol synthesis

acetyl-CoA > Mevalonate > squalene > cyclation of squalene > cholesterol

Atherosclerosis

leading cause of death in U.S.


Lipid deposits in CA

HDL

Good cholesterol. scavenger lipoprotein and takes lipids from different areas.




Want it to be Higher

LDL

Bad cholesterol, deposits lipids into the arteries. Higher lipid to protein. Transfer lipids to the cells. Excess amounts causes it to be deposited into the arteries.




Want it to be lower

Reminant Lipid Particles

breakdown of HDL and LDL

Chylomicrons

Formed in the intestine, then goes to helptic portal system and goes to the liver




Carry triglycerides and cholesterol



VLDL

Secreted by the liver, go to peripheral tissues and converted to IDL and LDL

How does plaque formation occur?

The LDL are swallowed up by macrophages > become foam cells > proinflammatory > Increased cytokines > increased cells and edema > release reactive oxygen species > oxidize the LDL > more inflammation > macrophages breakdown and become calcified

If we take the total cholesterol and divide by the HDL, what should it look like?

The number should be low.

What the first thing we can do about dyslipidemia?

Control diet and exercise.


<20% fat for total calorie intake


wt reduction


omega-3 fatty acids

How much should fat be a part of your diet?

<20%

Where does the majority of the dyslipidemia medications work?

In the hepatocyte.

Statins

LDL(-40%), prescribed in Coranary symptoms regardless of lipidemia. Look like HMG-CoA.


HDL(+10%). Modest decrease in triglycerides.


A: 40-70% oral bioavailablity


-extensive 1st pass, but that where it works


E: Heptic metabolism and kidney



Niacin

Decreases VLDL secretion from liver and LDL(-20%). HDL(+25%). Drop triglycerides.




2-6mg daily




cutaneous vasodilation, pruitis, dry skin, rash, ADB discomfort, elevation of liver enzymes

Fibrates

PPAR mediated lipolysis, decrease VLDL, LDL(-10%), HDL(+15%), drop triglycerides


Rare GI upset

Bile acid binding resins

LDL(-20%), HDL(+5%) & BG. May increase VLDL.


5-30 g/day mixed with liquid and must be with meals


Constipation, bloating, steatorrhea, oral drug absorption impairmentcompletely surround the fatty acids in gut. Not great for pts with malabsorption issues.

Ezetmibe (Zetia)

Blocks NPC1L1, inhibits cholesterol absorption


LDL(-20%), HDL(+5%)


A:Readily absorbed, increased with fibrates, decreased with resins.


D: Peak blood lvls 12-14 hrs T1/2: 22 hrs


E: 80% in feces