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Age-dependent modifications of mitochondrial trans-membrane potential and mass in rat splenic lymphocytes during proliferation.
Pieri, C; Recchioni, R; Moroni, F.
Affiliation
  • Pieri C; Cytology Center, Gerontological Research Department of I.N.R.C.A., Ancona, Italy.
Mech Ageing Dev ; 70(3): 201-12, 1993 Aug 15.
Article in En | MEDLINE | ID: mdl-8246634
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.
Subject(s)
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Database: MEDLINE Main subject: Spleen / Aging / Lymphocytes / Intracellular Membranes / Mitochondria Limits: Animals Language: En Year: 1993 Type: Article
Search on Google
Database: MEDLINE Main subject: Spleen / Aging / Lymphocytes / Intracellular Membranes / Mitochondria Limits: Animals Language: En Year: 1993 Type: Article