DM-2 Flashcards
Decreased insulin secretion __________ beta cells sensitivity to glucose
decreased
What is the drug of choice for type 2 diabetes
metformin
Metformin is transported into the cells by organic _______ transporters
cation
Metformin is excreted into urine by what
MATE 1 and 2
OCT-1 and OCT-3 are in _______ for activity in the liver
hepatocytes
OCT-2 are in ____ cells for excretion
renal
Metformin has a slow onset and a long duration of action meaning it is what kind of coverage
basal
Effects of metformin in liver
decrease gluconeogenesis
decrease lipogenesis and increase fatty acid oxidation
Effects of metformin in muscle
increase glucose uptake
increase glycogen storage
decrease lipogenesis
Effects of metformin in intestine
decrease intestinal glucose absorption
MOA of metformin (biguanides)
-decrease cellular respiration by inhibiting mitochondrial respiratory chain complex 1
-decrease ATP by inhibiting fructose 1,6 bisphosphate
-activate AMPK causing protein phosphorylation and decrease gluconeogenesis and lipogenesis gene expression
-antagonizes the action of glucagon by inhibiting adenylate cyclase
Adverse effects of metformin
GI upset
Metallic taste
decrease Vit B12
Rare: lactic acidosis
Metformin drug interaction with inhibitors of _____ transporters
OCT
Metformin drug interactions with drugs that increase plasma glucose can _________ the effects
antagonize (corticosteroids, estrogens)
Cimetidine _______ renal elimination of metformin
decreases
Ranolazine ___________ metformin serum levels
increase
Iodinated contrast media can enhance _______ adverse effecrs and renal failure
metformin
Insulin secretagogues are effective in patients with functional ______ cells
beta
Sulfonylureas cover _____ insulin levels and ________ insulin
basal
mealtime
MOA of sulfonylureas
-Bind to SUR 1 complex in Katp channel
-activate exocytosis and release endogenous insulin independent of plasma glucose
-increase tissue sensitivity to insulin (improved metabolic control)
-decreased hepatic glucose production and increase glucose uptake
Sulfonylureas adverse effects
hypoglycemia
weight gain
(GI, hematological rxn, hypersensitivity rxns, SIADH)
Aspirin, sulfonamides, chlorofibrates cause increased hypoglycemic effect in which drug class
Sulfonylureas
Miconazole, chloramphenicol, warfarin decrease __________ metabolism
Sulfonylureas
Ethanol increase action of _____________
Sulfonylureas
_________ are two hormones secreted from enteroendocrine cells in the intestine in response to food intake
incretins
______ is secreted from L-cells
GLP-1
_____ is secreted from K-cells
GIP
Incretins are metabolized by
DPP-4
_______ activate insulin secretion from the pancreas in response to food intake
incretins
GLP-1 MOA
-insulin secretion by activation of GLP-1 GPCR on beta cells
-receptor also in other cells
-PKA phosphorylates the channel (closes it)
-increase calcium from intracellular store -> exocytosis -> insulin secretion
GLP-1 is secreted into circulation from endocrine L cells in ______ __________ after a meal
small intestine
GLP-1 Effects in brain, stomach, liver, pancreas
brain: decrease appetite
stomach: decrease gastric empty
liver: decrease glucose production
pancreas: increase insulin secretion, decrease glucagon secretion
What two classes of drugs can restore GLP-1 activity from decreased GLP-1 postprandial, inadequate glucagon suppression, increase glucose output
GLP-1 analogs
DPP-4 inhibitors
Short-acting GLP-1 receptor agonists (exenatide, lixisenatide) cause what
postprandial hyperglycemia
Long-acting GLP-1 receptor agonists (exenatide, dulaglutide, liraglutide, semaglutide) cause what
basal glycemia
Metabolism of GLP-1 RA
proteolytic degradation and beta oxidation of FA
Adverse effects of GLP-1 RA
nausea, vomiting, diarrhea
weight loss
(hypersensitivity, hypoglycemia, altered kidney function, thyroid cancer, pancreatitis)
Contraindications of GLP-1 RAs
hypersensitivity rxns
GI problems or moderate to severe kidney disease
FH of medullary thyroid cancer
pregnancy
breast-feeding
Drugs that affect gastric emptying and drug absorption from GI tract cause a drug interaction with what class of drugs
GLP-1 RAs
Increased risk of hypoglycemia when used with other antidiabetic drugs cause a drug interaction with what class of drugs
GLP-1 RAs
Drugs that elevate plasma glucose and antagonize effect cause drug interaction with what class of drugs
GLP-1 RAs
What class of drug is Tirzepatide and what does it treat
GIP/GLP-1 RA
diabetes and obesity
Effects of Tirzepatide
significantly lower blood glucose levels
improve insulin sensitivity
reduce weight
amend dyslipidemia
When to take DPP-4 drugs
mealtime
DPP-4 MOA
-inhibit DPP-4 enzyme found on cell membrane
-serine protease cleaves N-t aa to inactivate incretins
-inhibit degradation of GLP-1 and GIP increasing levels of endogenous incretins and increase insulin secretion in a glucose independent manner
Effects of DPP-4 I
increase cellular glucose uptake
decrease hepatic glucose output
Adverse effects of DPP-4
pharyngitis/upper respiratory tract infections
hypoglycemia w/ other antidiabetic agents
(pancreatitis, hypersensitivity rxn, hepatotoxicity)
Drugs that inhibit CYP3A4/5 will elevate plasma levels in which class of drugs
DPP-4
Corticosteroids decrease effects of which class of drugs
DPP-4
All metabolites of SGLT-2s are _______
inactive
Filtered glucose is returned to the circulation by the action what
SGLT 1 and 2
_________ is in the s1/s2 segments and is a low affinity and high capacity transporter
SGLT-2
________ is in s3 segment of the proximal convoluted tubule and has high affinity and is a low capacity transporter
SGLT-1
SGLT2 Inhibitors MOA
-suppress of glucose reabsorption
-insulin-dependent
-decrease hyperglycemia by increasing urinary clearance of glucose to improve glycemic control and decrease toxicity
-do not confer a risk of hypoglycemia
-efficacy is reduced in renal impaired function
What SGLT-2 drug is the only inhibitor that also inhibits SGLT-1
Invokana
Side effects of SGLT2
-genital fungal and urinary infection
-GI, nausea, constipation
-hypotension and hypovolemia
-hypersensitivity
-not used in pregnancy
Side effects of metformin
diarrhea
stomach upset
nausea
vit B12 deficiency
Renal considerations in metformin
GFR <30 Cl contraindication
GFR <45 no new start, cut dose by 50%
What are these other considerations drug class apart of: weight neutral and insulin sensitizer
Metformin
GLP-1 agonists and GLP/G1P agonist side effects
nausea
vomiting
Other consideration in GLP-1 agonists and GLP/G1P agonists
injection
weight loss
reverse/improve insulin deficiency
global shortages
GLP-1 RAs risk and reduction
benefit: CKD and ASCVD
used: clinical ASCVD and high risk, albuminuria (>300mg/g)
SGLT-2 Inhibitors side effects
genital infections (yeast and UTI)
Other considerations in SGLT-2 inhibitors
weight loss
diuresis (BP lowering)
SGLT-2’s risk and reduction
Benefits: CKD, ASCVD, heart failure
Used: clinical and high-risk ASCVD, albuminuria (>300mg/g +eGFR >25), HF
Sulfonylureas side effects
weight gain
hypoglycemia
Sulfonylureas other considerations
pancreas burn out
renal adjustment needed
mechanistically unfavorable
DPP-IV inhibitors side effects
infectious complications (URIs)
usually very well tolerated
Other consideration in DPP-IV Inhibitors
renal adjustment (except tradjenta)
weight neutral
What are the 5 steps in diabetes management
glucose control
cardiorenal risk (anti-clotting, statin, ACE, GLP-1, SGLT-2)
DRP
Monitor
Follow-up