Glucose metabolism of human mononuclear cell subpopulations.

Abstract:

:Previous studies have demonstrated metabolic dysfunction in the mononuclear cells of some children with abnormal cell-mediated immunity. Interpretation of these observations has been complicated by the extreme heterogeneity of cell types examined. The glycolytic metabolism of relatively enriched T-cells, non-T mononuclear cells (NTM), non-T lymphocytes (NTL), and monocytes was studied in an attempt to measure the metabolism of subpopulations of mononuclear cells. Lactate production by monocytes was 11 times greater than that of T-cells and 2 1/2 times greater than that of non-T lymphocytes. Exposure to phytohemagglutinin (PHA) stimulated glycolytic metabolism in T-cells but did not stimulate glucose utilization or lactate production in NTM. Even when T-cells were maximally stimulated by PHA, their observed metabolism was still lower than that of NTL. The ATP content of T lymphocytes and NTL was similar and was constant under the conditions of incubation. The initial ATP content of monocytes was higher than that of lymphocytes, and diminished during incubation. Tricarboxylic acid cycle activity did not contribute significantly to ATP synthesis in any of the mononuclear cell subpopulations, under the conditions of incubation used in this study. Significant hexose monophosphate shunt activity was observed in all mononuclear cell types. These studies demonstrate major metabolic differences between mononuclear cell subtypes. Any correlation of metabolic observation with clinical dysfunction of mononuclear cells requires the study of relatively pure cell populations.

journal_name

Pediatr Res

journal_title

Pediatric research

authors

Storch S,Klein W,Feig SA,Henderson T

doi

10.1203/00006450-198002000-00005

subject

Has Abstract

pub_date

1980-02-01 00:00:00

pages

96-8

issue

2

eissn

0031-3998

issn

1530-0447

journal_volume

14

pub_type

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