Alkaline Phosphatase (ALP) Flashcards
Action of ALP
Liberate inorganic phosphate from organic phosphate
Liberation of inorganic phosphate from organic phosphate produce
Alcohol
ALP catalyze
Hydrolysis of phosphomonoester at an alkaline pH (9-10)
Activator used by ALP
Magnesium
In healthy individuals, ALP predominantly found in
Liver
Bones (osteoblast)
Major sources of ALP
Liver
Bones
Placenta
Kidney
Intestine
Enzymatic Assay used in ALP
Bowers and Mccomb
What is being measured in Bowers and Mccomb
P-nitrophenol
Color of P-nitrophenol
Yellow
Absorbance used in measuring ALP
405 nm
Uses B-glycero-phosphate as substrate
Bodansky
Shinowara
Jones
Reinhart
Product of Bodansky, Shinowara, Jones, and Reinhart
Inorganic phosphate + glycerol
A method that uses P-nitrophenyl phosphate as substrate
Bessy, Lowry, and Brock
Bowers and Mccomb
Method that used phenyl phosphate as substrate
King and Armstrong
Product of King and Armstrong Reaction
Phenol
Reference range of ALP:
Adult
30-90 U/l
Reference range of ALP:
0-3 months
70-220 U/l
Reference range of ALP:
3-10 years
50-260 U/l
Reference range of ALP:
10 yrs-puberty
60-295 U/l
why is it ALP is increased in ages 3-puberty
Osteoblast Activity is Active
What is used to differentiate ALP isoenzyme
Electrophoresis
ALP Electrophoretic Migration:
Fastest to slowest
Love, BPI
Liver - Bone - Placenta - Intestine
ALP isoenzyme:
Fastest to migrate towards anode
Liver ALP
Liver ALP is consist of what factors
Major Type
Fast Liver
Heat labile fraction of ALP isoenzyme
Bone ALP
Bone ALP:
temperature increases, ALP ____
Decreases
Bone ALP is significantly increased in what conditions
Paget’s disease
Ostitis deformans
Clinical Significance of Bone ALP
Bone disease
Healing of bone fracture
Physiologic bone growth
ALP isoenzyme:
Heat stable fraction
Placental ALP
Placental ALP is abundant at what stage of gestation
16th - 20th week of gestation
Placental ALP is significant in what condition
carcinoplacental ALP
Intestinal ALP is physiologically increased in what condition
After consumption of fatty meal (Blood type B and O)
Intestinal ALP is pathologically increased in
GIT disorders
Reagent that inhibits Placental and Intestinal ALP
Phenylalanine
Reagent that inhibits Bone ALP
3 M urea
Reagent that inhibits Bone and Liver ALP
Levamisole
Test used to differentiate the elevation of Liver or Bone ALP
Heat stability Test
Heat stabitility Characteristics of ALP
P>I>L>B
Residual Activity decreased to >20%
Liver ALP
Residual activity decreased to <20%
Bone ALP (heat labile)
Heat stability test is done by
Heating serum @56 deg cel. For 10 mins
Carcino Placental ALP are
Regan ALP
Nagao ALP
Most heat stable Placental ALP fraction
Regan ALP
Regan ALP is found in
Lungs
Breast
Gynecological disorder
Co-migrator of Bone
Regan ALP can still act @what temp
65 deg cel. For 30 minutes
Placental ALP fraction found in
Adenocarcinoma of pancreas
Bile duct
Pleural Cancer
Nagao ALP
Nagao ALP inhibitor
Phenylalanine and L-leucine
Regan ALP inhibitor
Phenylalanine