Cont………..
Charastrastric of Hormones
Composed of small Molecule easily cross
endothelial cell Membrane
Distance from gland act on target organ
Not permanently in circulation excrete in urine
Role of Hormone
Metabolism of carbohydrate, Protein, lipid
Balance of water, electrolytes , minerals
Control of cellular Metabolism
Growth and development
Cont………..
Key Concept One:
For each hormone, what is the target cell
and its receptor?
Single or Multiple Target Cells
Single or Multiple Receptors
Location of Receptors
Cell M ( Proteins , Peptide , Catecholamine)
Cytoplasm ( steroids)
Nucleus ( Thyroids T3, T4)
Cont………..
Regulation of Hormone secretion
Negative Feedback : Insulin secreted by beta cell of
Pancrease response to an increase in blood
glucose by decrease of blood glucose, secretion of
insulin
Positive Feedback: in hypothyroidism which
secretion of thyroid hormone secretion of TSH
increased
Special feature of endocrine illness
Delayed Growth
•Hypothyroidism, Hypopituitarism
Excessive growth
•Can be family, Race or physiologic but disease of pituitary gland
cause excessive GH
Obesity
•BMI 25-29 overweight , BMI over 30 called obesity
•Cushing syndrome, hypothyroidism, DM2,
Loss of weight
•4,5 kg or 5% of body weight decreased during 6-12 months
•Metabolic rate no eating can be both in cancer or one in
hyperthyroidism DM1 ,
Diabetes Mellitus
Definition of DM
Epidemiology
Classification and pathogenesis
Clinical and laboratory findings
treatment and management
Indication for hospitalization
And complication
Definition of DM
Diabetes Mellitus is a clinical syndrome
characterized by chronic hyperglycemia and
disturbance in carbohydrate , lipid and protein
The disease may result from defect in insulin
secretion , resistance or both
Contin…………..
Epidemiologic consideration-
o29.1 million people in the united states have DM which-
1.25 million have Type 1 DM
Most of the rest have Type 2 DM
Some are other specific types of DM
Both type of diabetes progressively increase but DM2 is more
because of obesity and decrease physical activity
Classification
Primary diabetes mellitus (Cause unknown)
Type I or insulin dependent ( IDDM)
Type 2 or non – insulin dependent (NIDDM)
Gestational Diabetes Mellitus
When pregnant woman without a previous history of diabetes
develop high blood sugar level
Secondary diabetes
•Consequence of another medical condition
Etiology
Type I DM (IDDM): result from autoimmune disease
Genetic susceptibility ( HLA DR4 gene mutation)
Inheritance ( this risk is greater with diabetes father than mother) Child of
diabetic mother has 3% risk of developing but child of diabetic father has
6% risk of developing of DM
Viral infection: Auto antibody to coxsackie virus
Panreatic pathology (pancreatitis,hemosidrosis)
Immunological factor ( IDDM is T-cell mediated autoimmune
disease
Contin……
Type 2 DM( NIDDM)
Genetic( twins chance of DM is 70%-90%)
Parents with DM child have more chance for DM
Environmental factor
Life style : obesity which increase resistance to insulin
Pancreatic Pathology
Reduction of insulin secretion
Resistance to insulin
Delayed insulin secretion in response to oral glucose
Pathogenesis
Type I DM: outo immune process destroy B cell of
Pancrease
At birth beta cell is natural progressively destroy
Destruction of cell are different in people
70%-80% cell damage after that clinical feature will
occure
Contin……….
Type 2 DM:
Insulin secretion , Resistance,over production of glucose.
80% patient are obese ( central obesity)
Causes of resistance against insulin
Insulin receptor in obese patient less than normal , in DM patient
alfa cell more than beta cell
Circulating endogenous insulin is sufficient to prevent
ketoacidosis but is inadequate to prevent hyperglycemia
Gastational Diabetes
Hypertrophy and hyperplasia causes resistance against
insulin increased glyconeogenesis and ketogenesis
If there is no enough insulin in pregnancy increase
glyconeogenesis and lipolysis cause ketosis
Esterogen and progesterone increase insulin demand
In third trimester CO increase lots of glucose inter renal tubule
cause glucose urea
Hyperglycemia of mother stimulate secretion of insulin in
fetus cause macrosomia
Clinical feature
Polyuria : due to osmotic diuresis
Polydipsia : due to loss of fluid and electrolyte
Weight loss : due to depletion of glycogen ( Type I )
There is no weight loss in type 2 DM
Blurred of vision : it result from exposure of lens and retina to
hyperosmolar fluid
Postural hypotension
Parasthesia
Ketoacidosis
Contin…………
Nocturia
Xerostomai
Superfacial infection: Genital candidiasis
Nausea
Headache
Delayed healing
Over eating
Chronic feature of DM neuropathy , Opthalmopathy
Reduced muscle mass (Type I DM)
Many other are asymptomatic initially (Type 2 DM)
Contin…………..
Physical Examination:
BMI
Fundoscopy
Orthostatic hypotension
Peripheral puslse
Site of insulin injection
Hypertension over 140/80mmhg in DM
Contin…….
Type I DM
Before age of 30 years
Thin body
Need insulin in first treatment
Ketoacidosis
Other outo immune disease ( autoimmune thyroiditis, pernicious
anemia)
Type 2 DM:
Occur after age of 30 years
80% are obese
Maybe at first not be used insulin as first treatment
Other problem ( CVD, Resistance to insulin, )
Contin………
Oral glucose tolerance test-
It done If fasting plasma glucose is less than 126mg/dl and DM is suspected
The stages to perform it include of –
oPatient may be on low carbohydrate diet
o
o
o
o
o
This test is interprete in below form-
o
oDiagnostic- if 2hours value greater than 200 mg/dl
oImpaired glucose tolerance- if 2 hours value 140- 199 mg/dl
Contin…………
Glycated hemoglobin(hemoglobin A1)measurement-
It circulate within red blood cells
Reflect the glycemic state over preceding 8-12 weeks
Thereby is method of assessing diabetic control
some condition may affect the value of Hb A1c-
o
survival(e.g splenectomy)
o
survival(e.g hemolysis)
A cutoff value of Hb A1c is 6.5%
Value of 5.7-6.4 should be considered at high risk fpr
developing DM(prediabetes)
Contin……..
Urine and blood ketons-
Qualitative detections of keton bodies
Quantitative detection of ketone bodies
Patients with greater than 3 mmol/L equivalent to very
large ketone bodies require hospitalization
Glycosuria
Type 2 DM ( LDL, TG) increased
Treatment
Goal of treatment:
Diminish sign and symptoms of hyperglycemia
Maintain Euglycemia
Prophylaxis from hypoglycemia
Treatment of dyslipidemia
Prophylaxis from infection
Contin……
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Caloric restriction is distributed as follow-
o45-65% carbohydrate
o10-30% as protein
o25-35% Fats
oAnd <30% as total fat (<7% saturated fat) with <300mg/d of
cholesterol
Patient with progressive kidney disease restriction of protein
intake to 0.8g/kg/d
Contin……
Weight reduction by caloric restriction is an
important goal in obese and Type 2 diabetic
patients
Insoluble fibers such as cellulose and hemicellulose
increase colonic transition and is efficient on colon
function
Soluble fibers such as gum and pectin tends to
retard nutrients absorption rates so that glucose
absorption is slower in diminish hyperglycemia
High soluble fibers content also have a favorable
effect on blood cholesterol decrease absorption of it
Medical Treatment
1.Medication that primarily stimulate insulin secretion by
binding to the sulfonylurea receptor on the beta cell-
A.sulfonylurea-
Stimulate insulin release from beta cells of pancrease
Increased receptor of insulin in target cell
Inhibit liver glycogenolysis
Contraindicate in liver failure , renal failure , pregnancy, type
1
Using in patients with type 2 diabetes but not in type 1
diabetes
Metabolize in the liver and excrete by kidney
Adverse effects of this drug include hypoglycemia and
weight gain
Mechanism of weight gain include improved glucose control and
increased food intake in response to hypoglycemia
Idiosyncratic reactions are rare with skin rashes and
hematologic toxicity(leukopenia,thrombocytopenia)
Contin….
Ther are two generation of sulfonylurea
oFirst generation include-
Tolbutamide
Tolazamide
Acetohexamide
Chlorpropamide
oSecond generation include-
Glyburide
Glipizide
Gliclazide
glimepiride
Contin…….
Meglitinide analogs-
Absorbed from intestine and metabolized in the liver
Half life is less than one hour, stimulate insulin from beta cell
Starting dose is 0.5 mg three times a day 15 minutes before
each meal
The dose can be titrated to 16 mg
Like sulfonylurea it can be use in combination to metformin
Side effect are include of hypoglycemia and weight gain
D-phenylalanine derivative-
Stimulate insulin secretion from beta cell
Rapidly absorbing from intestine and metabolized in the liver
Cause brief rapid pulse of insulin, when given before meal
reduce the postprandial raise of glucose
Starting and maintenance dose is 120mgr three times a day
Like other agents side effects are hypoglycemia and weight
gain
Posterior Anterior
Continue-
2.Medication that primarily lower glucose level by their action
on the liver,muscle,and adipose tissue- increase insulin
receptor
A.Metformin-( Biguanide)
Is the first line therapy in the patients with tye 2 diabetes
Inhibit glyconeogensis
Combine with sulfonylurea
Its ineffective in patients with type 1 diabetes
Half life is 1.5-3 hours and is not bind to plasma proteins
,being excreted unchanged by kidneys
Improve both fasting and postprandial hyperglycemia and
hypertriglyceridemia
Continue-
Posterior Anterior
This drug is avoided in CKD patients because of lactic
acidosis
In the united states this drug is not recommended at or
above a serum creatinine level of 1.4mg/dl in women and
1.5mg/dl in men
The medication should be stopped if creatinine exceeds
150mcmol/L(1.7mg/dl) or the GFR is below 30ml/min/1.73m
The maximum dose of metformin is 2550 mg
Its important to start from minimal dose and increase
gradually to reduce gastrointestinal upsets
The most frequent side effects of metformin are
gastrointestinal symptoms
Continue-
B. thiazolidinedione's-
Two medication of this class rosiglitazone and
pioglitazone are available
Sensitize peripheral tissue to insulin
Like biguanides does not cause hypoglycemia
And is effective as monotherapy and in combination with
sulfonylureas
Increase risk of angina pectoris and myocardial infarction
And also cause edema in 3-4 %
3.Medications that affects absorption of glucose-
Alpha-glucosidase inhibitor that competitively inhibit the
alpha glucosidase enzyme in the gut
Two below agents are most common:
oAcarbose
omiglitole
Continue-
4.Incretin –
Oral glucose provokes a threefold to fourfold higher
insulin response than an equivalent dose of glucose
given intravenously
Because oral glucose cause release of gut hormones
principally glucagon-like peptide1(GLP 1) and glucose
dependent insulinotropic polypeptide(GIP1) from L cell of
small intestine,
Infusion of GLP1 stimulate insulin secretion and lower
glucose level, decrease appetite and delayed stomach
emptying and cause weight loss
Continue-
Two group of drugs are include in this type-
A.GLP-1 receptor agonists-
oExenatide
oLiraglutide
oAlbiglutide
oDulaglutide
oLixisenatide
B.DPP-4 inhibitors
oSitagliptine
oSaxagliptine
oAlogliptine
oLinagliptine
ovildagliptine
Continue-
5.Sodium-glucose co- transporter 2 inhibitor-
90% inhibit glucose from proximal tubule
There are three agents in this group-
oCanagliflozine
oDapagliflozin
oEmpagliflozin
6.others-
oPramlintide
oBromocriptine
ocolesevelam
Continue-
Insulin indication :
Type I DM
Diabetic ketoacidosis
Hyperosmolar state
Gestational diabetes
Type 2 DM not response against oral agent
Type 2 DM patient with liver, renal, heart failure
Patient under large operation and general
anesthesia
Complication of insulin
Lipodystrophy
Dystrophy or hypertrophy in the site of injection
Antibody against insulin
Local ( edema, erythema , urticarial ) systemic(
angioedema, anaphylactic shock )
Hypoglycemia
Commonly in type 1DM
Chronic complications of DM
2. Diabetic retinopathy-
There are two main categories of diabetic
retinopathy-
oNo proliferative retinopathy- represent the earlier stage of
retinal involvement:
Micro aneurysm
Dot hemorrhage
Exudate
And retinal edema
oProliferative retinopathy- involves the growth of new
capillaries and fibrous tissue within the retina and vitreous
chamber
Contin……..
proliferative retinopathy can occur in both types of
diabetes
oWhich is more common in type 1 diabetes
oDeveloping about 7-10 years after onset of symptoms
oVision threatening retinopathy virtually never appears in type
1 in the first 3-5years
oUp to 20% of patients with type 2 have retinopathy at the
time of diagnosis
oAnnual ophthalmologist consultation must be arranged for
diabetic patients
3.Glaucoma-
oOccurs in approximately 6% diabetic patients
Contin……….
B. Diabetic nephropathy-
25-45% of patients with either type developes nephropathy
Is the leading cause of ESRD
And is the major cause of mortality and morbidity
Protein urea 30-299mg 24hr micro protein urea
24hr 300mg overt protein uria
Most common in type 1 than type 2 DM
Protein 0.8mg/kg , treatment of HTN
Captopril 50mg twice daily decrease protein uria
Sulfonylurea and metformin contraindicate in this
condition
Contin….
Diabetic Neuropathy :
50% in type 1 and type 2 DM
Poly neuropathy, mononeuropathy, Autonomic
Without CNS effect all other part of nervous system
Commonly bilateral peripheral neuropathy, paresthesia during
night spontaneously disappear
Poly neuropathy of lower limb
“Distal symmetric polyneuropathy”
Progressive loss of sensation: distal proximal
•Severe cases: motor weakness
Glove stocking neuropathy
Generally not reversible
•Glucose control slows progression
•Pain in feet (burning or stabbing)
•SNRIs: duloxetine or venlafaxine
•TCAs: amitriptyline,desipramine or nortriptyline
•AEDs: pregabalin or gabapentin
Contin….
Some autonomic neuropathy include of –
Orthostatic hypotension,
CV: orthostatic hypotension, silent ischemia
Intractable nausea and vomiting
Diabetic cystopathy
Chronic , persistent diarrhea , Dysphagia , Gastroparesis
Macro vascular complication of DM include of –
Coronary heart disease
Peripheral vascular disease
Cerebrovascular disease
50% of type 2 DM patient use antihypertensive drug
Miscellaneous complication of DM include of-
Erectile dysfunction
hypoglycemia
Contin…..
Lower extremity complication
Ulcer and infection are common
DM are common cause of non traumatic
amputation of lower extremity
Risk factor
•Neuropathy
•Peripheral vascular disease
•Ischemia
•Diabetic foot ulcer most in male, 10year of DM
history ,smoking , previously have ulcer
Contin…..
A.Acute complications-
1.Diabetic ketoacidosis- (Most commonly in type1 DM)
Symptoms
oNausea and vomiting
oThirst and polyuria
oAbdominal pain and shortness of breath
Physical findings-
oTachycardia
oDehydration/hypotension
oTachypnea/kussmaul respiration/respiratory distress
oAbdominal tenderness
oLethargy/edema and possibly coma
Contin….
Precipitating events-
oInadequate insulin administration
oInfection(pneumonia/UTI/gastroenteritis/sepsis)
oInfarction(cerebral/coronary/mesenteric/peripheral)
oDrugs(cocaine)
oPregnancy
oStress
Under these circumstance hormonal changes cause
glyconeogenesis
Decrease consumption of glucose in peripheral tissue cause
hyperglycemia
During lipolysis free fatty acid inter to liver synthesis of keton body
cause acidosis
Laboratory abnormalities
DKA is characterized by-
oHyperglycemia(serum glucose350-900mg/dl)
oKetosis
oAnd metabolic acidosis(serumbicarbonate<15mmol/L
PH ranges betw 6.8 and 7.3 depending on the severity of
acidosis
Level of potassium 5-8meq/lit , Hyponatremia ,
Hypophosphatemia
Phosphaturia caused by osmotic diuresis
•Loss of ATP
•Muscle weakness (respiratory failure)
•Heart failure (↓
Urine glucose and ketone positive
Hyperlipidemia
Leukocytosis with infection
Treatment of DKA
metabolic acidosis )
Patient admitted in ICU
Evaluation of serum electrolyte, renal function test
Serum saline (0.9% 2-3lit ) 1-3 first hr after 0.45% saline
250-500 ml per hr until plasma glucose 250 mgr/ dl
Glucose 5% and saline 0.45% 150-250ml/hr