Pendetide
Encyclopedia
Pendetide is a chelating agent. It consists of pentetic acid (DTPA) linked to the tripeptide
glycine
(G) – L-tyrosine
(Y) – L-lysine
(K).
are linked to pendetide to chelate a radionuclide
, indium-111. The antibodies selectively bind to certain tumour cells, and the radioactivity is then used for imaging of the tumours.
Tripeptide
A tripeptide is a peptide consisting of three amino acids joined by peptide bonds.Examples of tripeptides are:*Eisenin is a peptide with immunological activity that is isolated from the Japanese marine alga, Eisenia bicyclis, which more commonly is known as, Arame*GHK-Cu is a human copper binding...
glycine
Glycine
Glycine is an organic compound with the formula NH2CH2COOH. Having a hydrogen substituent as its 'side chain', glycine is the smallest of the 20 amino acids commonly found in proteins. Its codons are GGU, GGC, GGA, GGG cf. the genetic code.Glycine is a colourless, sweet-tasting crystalline solid...
(G) – L-tyrosine
Tyrosine
Tyrosine or 4-hydroxyphenylalanine, is one of the 22 amino acids that are used by cells to synthesize proteins. Its codons are UAC and UAU. It is a non-essential amino acid with a polar side group...
(Y) – L-lysine
Lysine
Lysine is an α-amino acid with the chemical formula HO2CCH4NH2. It is an essential amino acid, which means that the human body cannot synthesize it. Its codons are AAA and AAG....
(K).
Use
The following monoclonal antibodiesMonoclonal antibodies
Monoclonal antibodies are monospecific antibodies that are the same because they are made by identical immune cells that are all clones of a unique parent cell....
are linked to pendetide to chelate a radionuclide
Radionuclide
A radionuclide is an atom with an unstable nucleus, which is a nucleus characterized by excess energy available to be imparted either to a newly created radiation particle within the nucleus or to an atomic electron. The radionuclide, in this process, undergoes radioactive decay, and emits gamma...
, indium-111. The antibodies selectively bind to certain tumour cells, and the radioactivity is then used for imaging of the tumours.
- Indium (111In) capromab pendetide (prostate cancer)
- Indium (111In) satumomab pendetide (other cancer types)