PMID- 8725477 OWN - NLM STAT- MEDLINE DCOM- 19961001 LR - 20131121 IS - 0095-6562 (Print) IS - 0095-6562 (Linking) VI - 67 IP - 5 DP - 1996 May TI - Effect of low altitude on glycolytic key enzymes in red blood cells. PG - 478-9 AB - METHOD: The ATP level and the activities of hexokinase (HK), phosphofructokinase-1 (PFK-1) and pyruvate kinase (PK) in red blood cells (RBC) were measured in 50 school students 6-12 yr of age in the Jordan Valley (JV) which is the lowest region below sea level in the world (low altitude: 390 m below sea level, hyperoxic and with an average daily value of 796 mmHg barometric pressure) and in 50 school students of the same age group in Irbid region (normal altitude: 600 m above sea level and with an average daily value of 600 mmHg barometric pressure). The same parameters were measured also in 40 school students at sea level. RESULTS: A significant decrease in HK and PFK-1 activities and an increase in ATP level in the low altitude region, while no significant change in PK activity in JV-group when compared to Irbid and to the sea level control groups. Possible explanations will be discussed to interpret these observations. FAU - Bashir, N A AU - Bashir NA AD - Department of Physiology and Biochemistry, Faculty of Medicine, Jordan University of Science and Technology, Irbid, Jordan. LA - eng PT - Journal Article PL - United States TA - Aviat Space Environ Med JT - Aviation, space, and environmental medicine JID - 7501714 RN - 8L70Q75FXE (Adenosine Triphosphate) RN - EC 2.7.1.1 (Hexokinase) RN - EC 2.7.1.11 (Phosphofructokinase-1) RN - EC 2.7.1.40 (Pyruvate Kinase) SB - IM MH - Adenosine Triphosphate/metabolism MH - *Altitude MH - Child MH - Erythrocytes/*enzymology MH - *Glycolysis MH - Hexokinase/metabolism MH - Humans MH - Male MH - Phosphofructokinase-1/metabolism MH - Pyruvate Kinase/metabolism EDAT- 1996/05/01 00:00 MHDA- 1996/05/01 00:01 CRDT- 1996/05/01 00:00 PHST- 1996/05/01 00:00 [pubmed] PHST- 1996/05/01 00:01 [medline] PHST- 1996/05/01 00:00 [entrez] PST - ppublish SO - Aviat Space Environ Med. 1996 May;67(5):478-9.