Diabetes mellitus and subjects' ageing: A study on the ATP content and ATP-related enzyme activities in human erythrocytes

R. A. Rabini, E. Petruzzi, R. Staffolani, M. Tesei, P. Fumelli, M. Pazzagli, L. Mazzanti

Research output: Contribution to journalArticlepeer-review

Abstract

Na+/K+- and Ca2+-ATPase are the major ATP-dependent membrane-bound enzymes that regulate the cation transmembrane gradient which is altered both in red blood cell (RBC) senescence and in RBCs of diabetic patients. In an attempt to clarify the possible connection between diabetes mellitus and ageing, we investigated the relationship between RBC ATP content, Na+/K+-ATPase, Ca2+-ATPase activities and ageing in healthy, insulin-dependent (IDDM) and non-insulin-dependent (NIDDM) subjects. A significant correlation was found (r = -0.82; P <0.001) between RBC ATP content and subject's age only in the control group. A significant reduction in Na+/K+-ATPase activity was observed in the older group (C2) Of control subjects, in comparison with the younger (C1) one. In both IDDM and NIDDM subjects, the enzymatic activity was significantly decreased when compared with healthy subjects of similar age (P <0.001). A significant negative correlation was found between age and enzymatic activity in healthy subjects (r = -0.60; P <0.001). No difference was observed in the RBC membrane Ca2+-ATPase activity between younger (C1) and older (C2) healthy subjects. Ca2+-ATPase activity was significantly increased both in IDDM patients compared with C1 (P <0.001) and in NIDDM patients compared with C2 (P <0.001). The present data indicate that ageing causes a reduction in the erythrocyte ATP content in both healthy and diabetic subjects. In diabetic patients Na+/K+-ATPase activity decreases independently of age.

Original languageEnglish
Pages (from-to)327-332
Number of pages6
JournalEuropean Journal of Clinical Investigation
Volume27
Issue number4
Publication statusPublished - 1997

Keywords

  • Ageing
  • ATP content
  • Ca-ATPase
  • Erythrocyte
  • NaK-ATPase

ASJC Scopus subject areas

  • Medicine(all)

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