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Urinary Cortisol ELISA

  • Regulatory status:RUO
  • Type:Competitive ELISA
  • Species:Human
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New DKO018 96 wells (1 kit)
PubMed Product Details
Technical Data

Type

Competitive ELISA

Applications

Urine

Sample Requirements

10 µl/well

Shipping

Shipped on ice packs. Upon receipt, store the product at the temperature recommended below.

Storage/Expiration

Store the complete kit at 2 – 8 °C. Under these conditions, all components are stable until the expiration date (see label on the box).

Calibration Range

1 - 200 ng/ml

Limit of Detection

0.47ng/ml

Intra-assay (Within-Run)

n=20
CV=7.4%

Inter-assay (Run-to-Run)

n=20
CV=10.8%

Summary

Features

European Union: for in vitro diagnostic use

Rest of the world: for research use only!

The total assay time is less than 1.5 hours

Quantitative determination of free cortisol concentration in human urine
Assay format is 96 wells
Quality Controls (high and low) are ready to use

Standards are ready to use
For routine analysis

Research topic

Autoimmunity, Immune Response, Infection and Inflammation, Reproduction, Steroid hormones

Summary

Cortisol is a steroid hormone released from the adrenal cortex in response to an hormone called ACTH (produced by the pituitary gland), it is involved in the response to stress; it increases blood pressure, blood sugar levels, may cause infertility in women, and suppresses the immune system. Cortisol acts through specific intracellular receptors and has effects in numerous physiologic systems, including immune function, glucose-counter regulation, vascular tone, substrate utilization and bone metabolism. Cortisol is excreted primarily in urine in an unbound (free) form. Cortisol is bound, in plasma, from corticosteroid- binding globulin (CBG, transcotin), with high affinity, and from albumin. Only free cortisol is available to most receptors. These normal endogenous functions are the basis for the physiological consequences of chronic stress - prolonged cortisol secretion causes muscle wastage, hyperglycaemia, and suppresses immune / inflammatory responses. The same consequences arise from long-term use of glucocorticoid drugs. The free cortisol fraction represents the metabolically active cortisol. In normal conditions, less then 1% it comes excrete in urines. In pathological conditions (syndrome of Cushing) the levels of free urinary cortisolo are elevate, because the CBG don’t bound the plasmatic cortisol in excess and it was remove with urines. During pregnancy or estro-progestogen treatment an increase of plasmatic cortisol caused by an increment of the production of the transport protein, but the levels of free urinary cortisol results normal to indicate a correct surrenic functionality. This test is very useful to estimate the real surrenic function, because is dose the free cortisol, it is the metabolically active form. Moreover the measurement of free urinary cortisolo is the better parameter for the diagnosis of the Cushing’s syndrome.

Summary References (7)

References to Cortisol

  • Brock P, Eldred EW, Woiszwillo JE, Doran M, Schoemaker HJ. Direct solid-phase 125I radioimmunoassay of serum cortisol. Clin Chem. 1978 Sep;24 (9):1595-8
  • Check JH, Ubelacker L, Lauer CC. Falsely elevated steroidal assay levels related to heterophile antibodies against various animal species. Gynecol Obstet Invest. 1995;40 (2):139-40
  • Demers LM, Derck DD. Comparison of competitive protein binding analysis and radioimmunoassay for the determination of cortisol in serum and urine. Clin Biochem. 1977 Jun;10 (3):104-8
  • Morris R. A simple and economical method for the radioimmunoassay of cortisol in serum. Ann Clin Biochem. 1978 May;15 (3):178-83
  • Poland RE, Rubin RT. Saliva cortisol levels following dexamethasone administration in endogenously depressed patients. Life Sci. 1982 Jan 11;30 (2):177-81
  • Silver AC, Landon J, Smith DS, Perry LA. Radioimmunoassay of cortisol in saliva with the "GammaCoat" kit. Clin Chem. 1983 Oct;29 (10):1869-70
  • Vecsei P, Penke B, Katzy R, Baek L. Radioimmunological determination of plasma cortisol. Experientia. 1972 Sep 15;28 (9):1104-5
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