Biomaterial Database

Studies on phosphoglucose isomerase from cultured human fibroblasts: absence of detectable ageing effects on the enzyme. 1978

V Shakespeare, and J H Buchanan

Some properties of the enzyme phosphoglucose isomerase (PGI) from the foetal lung fibroblast strain MRC-5 have been investigated throughout the in vitro lifespan of this cell strain. No significant age-related alterations in specific activity or thermostability of PGI could be detected. Titration of enzymatic activity with antibody directed against purified PGI showed no detectable differences in PGI from extracts of early passage cells compared with enzyme from senescent cells. The effect of p-fluorophenylalanine incorporation on PGI was examined in early passage fibroblasts. Thermostability studies showed increased heat lability of PGI from analogue treated cells when compared with enzyme from control cells at the same passage. However, no inactive PGI protein could be detected by anti-serum titration in extracts from analogue-treated cells. The results indicate that no significant amount of altered or inactive PGI is produced in ageing fibroblasts.

UI	MeSH Term	Description	Entries
D010135	p-Fluorophenylalanine	3-(p-Fluorophenyl)-alanine.	para-Fluorophenylalanine,4-Fluorophenylalanine,p Fluorophenylalanine,4 Fluorophenylalanine,Fluorophenylalanine, p,para Fluorophenylalanine
D002460	Cell Line	Established cell cultures that have the potential to propagate indefinitely.	Cell Lines,Line, Cell,Lines, Cell
D002470	Cell Survival	The span of viability of a cell characterized by the capacity to perform certain functions such as metabolism, growth, reproduction, some form of responsiveness, and adaptability.	Cell Viability,Cell Viabilities,Survival, Cell,Viabilities, Cell,Viability, Cell
D005956	Glucose-6-Phosphate Isomerase	An aldose-ketose isomerase that catalyzes the reversible interconversion of glucose 6-phosphate and fructose 6-phosphate. In prokaryotic and eukaryotic organisms it plays an essential role in glycolytic and gluconeogenic pathways. In mammalian systems the enzyme is found in the cytoplasm and as a secreted protein. This secreted form of glucose-6-phosphate isomerase has been referred to as autocrine motility factor or neuroleukin, and acts as a cytokine which binds to the AUTOCRINE MOTILITY FACTOR RECEPTOR. Deficiency of the enzyme in humans is an autosomal recessive trait, which results in CONGENITAL NONSPHEROCYTIC HEMOLYTIC ANEMIA.	Glucosephosphate Isomerase,Phosphoglucose Isomerase,Phosphohexose Isomerase,Autocrine Motility Factor,Isomerase, Glucose 6 Phosphate,Neuroleukin,Tumor Autocrine Motility Factor,Tumor-Cell Autocrine Motility Factor,Factor, Autocrine Motility,Glucose 6 Phosphate Isomerase,Isomerase, Glucose-6-Phosphate,Isomerase, Glucosephosphate,Isomerase, Phosphoglucose,Isomerase, Phosphohexose,Motility Factor, Autocrine,Tumor Cell Autocrine Motility Factor
D006358	Hot Temperature	Presence of warmth or heat or a temperature notably higher than an accustomed norm.	Heat,Hot Temperatures,Temperature, Hot,Temperatures, Hot
D000941	Antigens	Substances that are recognized by the immune system and induce an immune reaction.	Antigen