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The enzyme alkaline phosphatase (ALP, alkaline phenyl phosphatase) is a phosphatase with the physiological role of dephosphorylating compounds. The enzyme is found across a multitude of organisms, prokaryotes and eukaryotes alike, with the same general function, but in different structural forms suitable to the environment they function in. Alkaline phosphatase is found in the periplasmic ...
Elevated alkaline phosphatase is most commonly caused by liver disease or bone disorders. Testing for ALP primarily consists of obtaining a blood sample from a patient along with several other tests for the disorder in question that may be associated with the increase in ALP in the blood serum. [ 21 ]
Hyperparathyroidism is an increase in parathyroid hormone (PTH) levels in the blood. [ 1 ] [ 4 ] This occurs from a disorder either within the parathyroid glands ( primary hyperparathyroidism ) or as response to external stimuli ( secondary hyperparathyroidism ). [ 1 ]
The main symptoms of hypoparathyroidism are the result of the low blood calcium level, which interferes with normal muscle contraction and nerve conduction.As a result, people with hypoparathyroidism can experience paresthesia, an unpleasant tingling sensation around the mouth and in the hands and feet, as well as muscle cramps and severe spasms known as "tetany" that affect the hands and feet ...
Tertiary hyperparathyroidism is a condition involving the overproduction of the hormone, parathyroid hormone, produced by the parathyroid glands. [1] The parathyroid glands are involved in monitoring and regulating blood calcium levels and respond by either producing or ceasing to produce parathyroid hormone.
Alkaline phosphatase allows for mineralization of calcium and phosphorus by bones and teeth. [21] ALPL gene mutation leads to insufficient TNAP enzyme and allows for an accumulation of chemicals such as inorganic pyrophosphate [ 21 ] to indirectly cause elevated calcium levels in the body and lack of bone calcification.
It is not clear how the described genetic defects increase the Na + /K +-ATPase activity, but it is suspected that the enzyme becomes more active due to increased thyroid hormone levels. Hyperthyroidism increases the levels of catecholamines (such as adrenaline ) in the blood, increasing Na + /K + -ATPase activity. [ 5 ]
Hypophosphatasia is caused by a genetic defect of tissue-nonspecific alkaline phosphatase (TNSALP), an enzyme that plays a role in bone mineralization. Asfotase alfa is a recombinant glycoprotein that contains the catalytic domain (the active site) of TNSALP. It is thus a form of enzyme replacement therapy. [5] [12]