Neurokinin A-994

Test info

  
Neurokinin A
  
994
  
LAB994
  
MSO
  
Substance K
  

Neurokinin A is a ten amino acid putative transmitter synthesized in the neurons it is present in.  Neurokinin A is a member of the family called Tachykinins which also include Neurokinin B, Substance P, Physalaemin, and Eledoisin.   Neurokinin A shares 6 of 10 peptide homologies with Neurokinin B even though they are produced by different genes.   Neurokinin A is also very similar in structure to Substance P and produces some of the same biological actions as Substance P.  Neurokinin A is a potent bronchoconstrictor.  In the gut, Neurokinin A is produced by the intrinsic enteric nervous system.

Specimen

  
  • Patient should not be on any medications that affect hypertension, gastrointestinal functions, or pain relievers, if possible, for at least 48 hours prior to specimen collection.

  
Plasma
  
2.0 mL
  
1.0 mL
  
  1. Spin  within two (2 hours of sample collection
  2. Transfer 2.0 mL plasma to a  Screw-cap polypropylene frozen transport vial/tube - 4mL (LabCorp) 
  3. Freeze
  

Frozen (strict) - 14 days

Refrigerated - NO

Ambient - NO

  
  • Specimen not collected in Z preservative tube.

Performance

  
Inter Science Institute via LabCorp (847447): R-NX
  
Varies
  
20 days
  

Direct Radioimmunoassay (RIA)

Clinical and Interpretive info

  

< 40 pg/mL

Billing

  
83519

Tracking

  
05/05/2010
  
12/29/2023
  
12/21/2023