Lipoxidase

(redirected from lipooxygenase)
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lipoxidase

[li′päk·sə‚dās]
(biochemistry)
An enzyme catalyzing the oxidation of the double bonds of an unsaturated fatty acid.

Lipoxidase

 

an enzyme of the oxydoreductase class that oxidizes unsaturated fatty acids to peroxides.

Lipoxidase was first discovered in 1934 in soybeans. It was later found to exist in the seeds of other plants and in the muscle tissue of fish and mammals. The principal substrates for lipoxygenase are linoleic, linolenic, and arachidonic acids and their respective esters. Lipoxidase is activated by polypeptides.

REFERENCE

Kretovich, V. L. Vvedenie v enzimologiiu. Moscow, 1967.
References in periodicals archive ?
This model is thought to induce pain by indirectly acting on the abdominal release of prostaglandins and lipooxygenase products.
Proanthocyanidins demonstrate their free-radical scavenger and antioxidant activity through vasodilator, anti-carcinogenic, anti-allergic, anti-inflammatory, antibacterial, cardio-protective, immune-stimulant, antiviral, estrogenic effects related to cyclooxygenase, phospholipase A2, and lipooxygenase inhibition (9-11).
The ligand-receptor complex is then internalized and degraded leading to (1) activation of phospholipase A2-release of arachidon- ic acid which via cyclooxygenase and lipooxygenase activity leads to formation of prostaglandins and leu- cotriens; (2) activation of phospholipase-C through a G-protein with degradation of PIP2 and formation of IP3 and DAG; and (3) recruitment of substrate pro- teins to an oligomerized growth factor receptor with increased tyrosine kinase activity.
ROS can be produced by the action of NADPH oxidase, uncoupled nitric oxide synthase (NOS), mitochondrial electron transport, xanthine oxidase, cyclooxygenase, lipooxygenase, heme oxygenase and cytochrome P450 monooxygenase.
Cyclooxygenase and lipooxygenase inhibitors have been reported from onions (Bayer et al.
Curcumin, an atoxic antioxidant and natural NFkappaB, cyclooxygenase-2, lipooxygenase, and inducible nitric oxide synthase inhibitor: a shield against acute and chronic diseases.
Nettle leaf has cyclooxygenase and lipooxygenase that may slow the enzymes that trigger inflammation.
Studies have shown that they also inhibit lipid peroxidation, thrombocyte aggregation, capillary permeability, and various enzymatic systems including cyclooxygenase and lipooxygenase.
The dexamethasone acts by inhibiting phospholipase enzyme, thereby blocking oxygenase and lipooxygenase pathway and reduce the synthesis of prostaglandins thereby reducing edema and pain [16].
Lichochalone A is a COX as well as a lipooxygenase inhibitor, also allowing for anti-inflammatory effects.
In addition to this, CAPE is a lipooxygenase inhibitor with antioxidant properties (Natarajan et al.