Pyroglutamate aminopeptidase activity in human cerebrospinal fluid decreases with age. 1987

C Prasad, and H J Robertson, and A Jayaraman, and J K Rao

The activity of pyroglutamate aminopeptidase, the major enzyme catalyzing thyrotropin-releasing hormone (TRH) metabolism in human CSF, decreased with age. This decrement is not due to age-dependent appearance of any enzyme inhibitor in CSF. The results of these studies underline the importance of using age-matched controls in assessing abnormalities of TRH metabolism in CSF during disease states.

UI MeSH Term Description Entries
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D011751 Pyroglutamyl-Peptidase I An enzyme that catalyzes the release of a N-terminal pyroglutamyl group from a polypeptide provided the next residue is not proline. It is inhibited by thiol-blocking reagents and occurs in mammalian tissues, microorganisms, and plants. (From Enzyme Nomenclature, 1992) EC 3.4.19.3. 5-Oxoprolyl-Peptidase,Pyroglutamate Aminopeptidase,Pyrrolidonecarboxylate Peptidase,Pyrrolidonyl Peptidase,Pyroglutamyl-Peptide Hydrolase,5 Oxoprolyl Peptidase,Aminopeptidase, Pyroglutamate,Peptidase, Pyrrolidonecarboxylate,Peptidase, Pyrrolidonyl,Pyroglutamyl Peptidase I,Pyroglutamyl Peptide Hydrolase
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D000368 Aged A person 65 years of age or older. For a person older than 79 years, AGED, 80 AND OVER is available. Elderly
D000375 Aging The gradual irreversible changes in structure and function of an organism that occur as a result of the passage of time. Senescence,Aging, Biological,Biological Aging
D000626 Aminopeptidases A subclass of EXOPEPTIDASES that act on the free N terminus end of a polypeptide liberating a single amino acid residue. EC 3.4.11. Aminopeptidase

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