The COX Colorimetric Inhibitor Screening Assay measures the peroxidase component of cyclooxygenases. The peroxidase activity is assayed colorimetrically by monitoring the appearance of oxidized TMPD at 590 nm. Inhibition of COX activity by a variety of selective and nonselective inhibitors shows…

This assay kit provides an accurate and convenient method for screening LO inhibitors. This assay measures the hydroperoxides generated from the incubation of a LO (5-, 12-, or 15-LO) with either arachidonic or linoleic acid.

The sPLA2 (Type V) Inhibitor Screening Assay is a convenient colorimetric assay designed for rapid screening of Type V sPLA2 inhibitors in a 96-well format. Each kit contains assay buffer, DTNB, diheptanoyl thio-PC, human sPLA2 (Type V), a 96-well plate, plate cover, and complete instructions.

Leukotrienes (LTs) are a group of acute inflammatory mediators derived from arachidonic acid in eosinophils, mast cells, and macrophages. Their biosynthesis proceeds via the 5-lipoxygenase (5-LO) pathway in which 5-LO converts arachidonic acid into LTA4 with 5(S)-HpETE as an intermediate. The…

The measurement of FFA can be useful in determining metabolic status. Cayman’s Free Fatty Acid (FFA) Assay can be used for measuring free fatty acids in plasma, serum, and urine. The FFA Assay utilizes a coupled enzymatic reaction that results in generation of the highly fluorescent product resorufin.

The COX Activity Assay utilizes the peroxidase component of cyclooxygenases. The peroxidase activity is assayed colorimetrically by monitoring the appearance of oxidized TMPD at 590 nm.The assay can be used to measure COX activity (COX-1 and COX-2) in cell lysates, tissue homogenates, and purified…

Mammalian sEH is a member of the α/β-hydrolase fold family of enzymes that catalyze the hydrolysis of exogenous and endogenous epoxides to vicinal diols. Endogenous substrates for sEH include EETs which exhibit vasodilatory and anti-inflammatory activity. Cayman’s sEH Cell-Based…

Latanoprost is an F-series PG analog which has been approved for use as an ocular hypotensive drug. PG esters and other similar derivatives act as prodrugs which are converted to the active free acid form by an esterase/amidase activity in ocular tissues. The free acid form of Latanoprost is 200…

Resolvin D2 (RvD2) is produced physiologically from the sequential oxygenation of docosahexaenoic acid (DHA) by 15- and 5-lipoxygenases. RvD2 reduces polymorphonuclear leukocyte transendothelial migration, the earliest event in acute inflammation, by ~70% at doses as low as 10 pg in the mouse model…

Sphingomyelin is an important lipid component of cell membranes and lipoproteins. Cayman’s SM Assay provides a specific, sensitive, and convenient method for quantifying SM in plasma or serum in a 96-well format with a colorimetric readout at 595 nm.

Quantification of lipid peroxidation is essential to assess the role of oxidative injury in pathophysiological disorders. Lipid peroxidation results in the formation of highly reactive, unstable hydroperoxides of both saturated and unsaturated lipids. Cayman’s Lipid Hydroperoxide Assay…

Cayman’s STAT-8-isoprostane ELISA is a competitive assay that permits the rapid measurement of 8-iso PGF2α from biological samples, requiring only 1 hour incubation and development times for each step. This assay format is similar to that employed in Cayman’s original…

This assay was developed for screening applications in which the relative amount of PG production for a large number of cell culture samples must be determined. The antiserum used in this assay exhibits high cross reactivity for most PGs which will allow quantification of all the PGs in a given…

This kit contains all reagents necessary for simple one-step purification of 8-isoprostane from most biological samples.

Prostaglandin E2 is one of the primary cyclooxygenase products of arachidonic acid and one of the most widely investigated prostaglandins. Its activity influences inflammation, fertility and parturition, gastric mucosal integrity, and immune modulation. The effects of PGE2 are transduced by at…

For the quantification of TXB₂ in urine, serum, tissue culture supernatants, and other sample matrices Sensitivity (80% B/B0): 5 pg/ml Assay Range: 1.6-1,000 pg/ml Thromboxane A2 (TXA2) is produced from arachidonic acid by many cells and causes irreversible platelet…

The COX Colorimetric Inhibitor Screening Assay measures the peroxidase component of cyclooxygenases. The peroxidase activity is assayed colorimetrically by monitoring the appearance of oxidized N,N,N',N'-tetramethyl-p-phenylenediamine (TMPD) at 590 nm. Inhibition of COX activity, measured…

Cayman’s PLA2 ELISA Kit is an immunometric (i.e. "sandwich") assay that can be used for the quantification of sPLA2 in plasma, synovial fluid, and other sample matrices. Each kit contains AChE:s PLA2 antibody conjugate, antiserum, human recombinant sPLA2 standard, Ellman’s…

Resolvin D1 (RvD1) is produced physiologically from the sequential oxygenation of DHA by 15- and 5-lipoxygenases. The 17(R)-epimer of RvD1 can also be generated with aspirin-treatment. Both RvD1 and its 17(R) configuration reduce human polymorphonuclear leukocyte (PMNL) transendothelial migration,…

11β-PGF2α is the primary plasma metabolite of PGD2 in vivo, the levels of which can increase from 6 pg/ml in a normal healthy volunteer to 490 ng/ml in patients with systemic mastocytosis. The normal human urinary excretion of 11β-PGF2α is about 11 ng/mmol creatinine (~400…

Cayman’s PGD2-MOX Express ELISA is a competitive assay that permits the rapid measurement of PGD2 from biological samples, requiring only 1 hour incubation and development times for each step. The methodology for the assay is the same as that employed in the PGD2-MOX ELISA (Item No. 512011).…

PGF2α is one of the five primary PGs derived enzymatically directly from the endoperoxide PGH2. The majority of the functional roles ascribed to it relate to fertility, pregnancy, and parturition. Like all of the primary PGs, PGF2α has a very short half-life in the general circulation.…

Arachidonoyl thio-PC is a substrate for cPLA2 by virtue of the presence of arachidonic acid at the sn-2 position of the glycerophospholipid. Hydrolysis of the arachidonoyl thioester bond at the sn-2 position by PLA2 releases free thiol which can be detected by DTNB. This assay can be used to…

Because of the rapid metabolism of PGE2, the determination of in vivo PGE2 biosynthesis is often best accomplished by the measurement of PGE2 metabolites. Cayman’s PGEM Assay converts all 13,14-dihydro-15-keto PGE2 and 13,14-dihydro-15-keto PGA2 into a single stable derivative, which is…

Cayman’s AMP+ Mass Spectrometry Kit contains a positively charged reagent (AMP+) that can be coupled quantitatively to free carboxylic acids through an amide bond linkage. The resulting derivatized product thus contains a positively charged group that shows improved electrospray ionization…

COX-1 and COX-2 catalyze the production of the PG and TX precursor PGH2. COX-2 is primarily responsible for the biosynthesis of PGs under acute inflammatory conditions. The COX-2 (human recombinant) Inhibitor Screening Assay measures PGF2α that is produced by SnCl2 reduction of COX-2-derived…

Leukotriene E4 (LTE4) is a product of the 5-lipoxygenase (5-LO) pathway in activated mast cells, eosinophils, and monocytes. LTA4, the primary 5-LO metabolite, is rapidly converted to LTC4 and sequentially to LTD4 and LTE4. While plasma levels of LTC4 are virtually undetectable, exogenously…

15(S)-HETE is produced from arachidonic acid by the enzyme 15-LO. In humans it is formed primarily in the respiratory epithelium, leukocytes, and reticulocytes. It may contribute to allergic rhinitis, has anti-inflammatory properties, and acts as a vasoconstrictor. Cayman’s 15(S)-HETE ELISA…

Prostaglandin D2 (PGD2) is biosynthesized in the brain by a soluble, 26 kDa glutathione-independent lipocalin-type PGD2 synthase. This PGD2 accumulates in the cerebrospinal fluid (CSF), where it induces physiologic sleep in rats and humans. PGD2 is also synthesized in mast cells and leukocytes by a…

tetranor-PGDM is a major metabolite of PGD2 found in human and murine urine. Normal levels of tetranor-PGDM in human and murine urine are 1.5 ng/mg creatinine and 8.1 ng/mg creatinine respectively. Cayman’s tetranor-PGDM ELISA is a competitive assay that can be used for quantification of…

The EP4 receptor is one of four GPCRs that mediate the actions of prostaglandin E2 (PGE2). The diverse effects of PGE2 acting via EP4 receptors point to the need to identify novel agonists and antagonists, both to further elucidate the function of this receptor subtype and for use as therapeutics…

Thromboxane A2 (TXA2), produced from arachidonic acid, causes irreversible platelet aggregation, vascular, and bronchial smooth muscle contraction. TXA2 is rapidly hydrolyzed non-enzymatically to form TXB2. However, most of the TXB2 measured in the plasma or urine of healthy individuals is due to…