Age-dependent modifications of mitochondrial trans-membrane potential and mass in rat splenic lymphocytes during proliferation

Carlo Pieri, Rina Recchioni, Fausto Moroni

Research output: Contribution to journalArticlepeer-review

Abstract

The specific fluorescent probes, Rhodamine 123 (Rh-123) and Nonyl-Acridine Orange (NAO) were, respectively, used to monitor the changes in membrane potential and mass of lymphocyte mitochondria during aging and proliferation. An age-dependent increase of the uptake of both fluorochromes was observed in resting cells; however, NAO fluorescence increased to a greater extent when compared with the Rh-123 probe. This resulted in a lower respiratory activity per unit of mitochondrial mass in old cells than in the young ones. Following mitogenic stimulation, most of the lymphocytes from young rats showed an increase in their membrane potential and mass. On the contrary about 50% of cells from old rats had depolarized mitochondria after 72 h from the stimulation. Present data support that mitochondria of lymphocytes from old rats are extremely sensitive to the stressing conditions resulting from mitogenic stimulation.

Original languageEnglish
Pages (from-to)201-212
Number of pages12
JournalMechanisms of Ageing and Development
Volume70
Issue number3
DOIs
Publication statusPublished - Aug 15 1993

Keywords

  • Aging
  • Lymphocytes
  • Mitochondria
  • Proliferative Response

ASJC Scopus subject areas

  • Ageing
  • Biochemistry
  • Developmental Biology
  • Developmental Neuroscience

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