14-3-3 protein

Dr Daniel J Bell and Dr Henry Knipe et al.

14-3-3 proteins are found in the cerebrospinal fluid (CSF), and are currently used to help identify patients with sporadic Creutzfeldt-Jakob disease (sCJD). 

Seven distinct 14-3-3 proteins have been found in humans.

In diagnosing sCJD, the sensitivity of 14-3-3 protein is 92% and its specificity is 80% 1. A negative 14-3-3 assay may be helpful in reducing the suspicion of sCJD.

Results need to be correlated with the patient's history as CSF 14-3-3 can be false positive in acute stroke, encephalitis, and other dementias 1.

History and etymology

The unusual name of the protein family derived from the time of the first protein's discovery when it was found to distribute in the 14th fraction when eluted with DEAE chromatography, and then within fraction 3.3 after additional analysis with gel electrophoresis 4.

Share article

Article information

rID: 43597
Section: Pathology
Tag: cases
Synonyms or Alternate Spellings:
  • Protein 14-3-3
  • 14-3-3 protein in CSF

Support Radiopaedia and see fewer ads

Updating… Please wait.
Loadinganimation

Alert accept

Error Unable to process the form. Check for errors and try again.

Alert accept Thank you for updating your details.