Test Catalog

Test ID: USTEK    
Ustekinumab Quantitation with Antibodies, Serum

Method Description Describes how the test is performed and provides a method-specific reference

Ustekinumab quantitation and anti-ustekinumab antibody measurements are performed using enzyme-linked immunosorbent assay (ELISA). Microwell strips are coated with a target antigen. Calibrators, controls, and patient samples are added to separate wells, allowing ustekinumab (UTK), or antibodies to ustekinumab (ATU), to bind to immobilized antigen. Unbound sample is washed away, and a conjugate is added to each well. A second incubation step allows the conjugate to bind to the UTK or ATU that has become attached to the microwells. After washing away the excess of unbound conjugate, the remaining enzyme activity is determined by adding a substrate and measuring the intensity of the color that develops in a spectrophotometer. The signal obtained is proportional to the amount of UTK or ATU in the patient sample.(Package inserts: Promonitor-UTK, Kit Product Number: 5371430000. Progenika Biopharma SA; Rev. 2, 4/2019; Promonitor-ANTI-UTK, Kit Product Number: 5381430000. Progenika Biopharma SA; Rev. 3, 4/2019)

PDF Report Indicates whether the report includes an additional document with charts, images or other enriched information


Day(s) and Time(s) Test Performed Outlines the days and times the test is performed. This field reflects the day and time the sample must be in the testing laboratory to begin the testing process and includes any specimen preparation and processing time required before the test is performed. Some tests are listed as continuously performed, which means assays are performed several times during the day.

Tuesday, Friday; 11:00 a.m.

Analytic Time Defines the amount of time it takes the laboratory to setup and perform the test. This is defined in number of days. The shortest interval of time expressed is "same day/1 day," which means the results may be available the same day that the sample is received in the testing laboratory. One day means results are available 1 day after the sample is received in the laboratory.

1 day

Maximum Laboratory Time Defines the maximum time from specimen receipt at Mayo Clinic Laboratories until the release of the test result

4 days

Specimen Retention Time Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded

14 days

Performing Laboratory Location Indicates the location of the laboratory that performs the test