NCIt definition : A radioconjugate consisting of the positron emitting radioisotope fluorine F 18 conjugated
to the substance P antagonist receptor quantifier (SPA-RQ) used in radioimaging. [18F]-labeled
substance P antagonist receptor quantifier is an antagonist of the neurokinin 1 (substance
P) receptor (NK1R) and can function as a positron emission tomography (PET) imaging
agent for detecting NK1R-expressing cells and tissues. NK1Rs are frequently expressed
on the plasma membranes of tumor cells from glioblastoma and breast and pancreatic
carcinomas.;
Alternative definition : NCI-GLOSS: A radiolabeled substance being studied in PET imaging of the brain. It
is also being studied as a way to find where cancer cells have spread in patients
with pancreatic cancer. It binds to cell receptors for substance P, also known as
neurokinin-1, which is found on nerve cells and on some types of cancer cells, such
as pancreatic cancer cells. [18F]-labeled substance P antagonist receptor quantifier
is a type of PET radioligand and a type of radiolabeled neurokinin-1 receptor antagonist.;
UNII : 4YL3GT1EV9;
CAS number : 262598-99-2;
Codes from synonyms : CDR0000613892; CDR0000613891;