Infected malnourished children displayed changes in early activation andￂ lymphocyte subpopulations

Aim Malnutrition and infections cause immunological changes in lymphocyte subpopulations and their functionality. We evaluated the activation capacity of lymphocytes and memory cells in 10 well nourished, seven well-nourished infected and eight malnourished infected children before and after treatme...

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Bibliographic Details
Published inActa Paediatrica Vol. 106; no. 9; p. 1499
Main Authors Najera-Medina, Oralia, Valencia-Chavarria, Fernando, Cortes-Bejar, Consuelo, Palacios-Martinez, Monika, Rodriguez-Lopez, C Paulina, Gonzalez-Torres, María Cristina
Format Journal Article
LanguageEnglish
Published Stockholm Wiley Subscription Services, Inc 01.09.2017
Subjects
Activation
Activation analysis
Antigens
CD4 antigen
CD45RA antigen
CD69 antigen
CD8 antigen
Cell activation
Cell size
Children
Flow cytometry
Immunological memory
Immunology
Infections
Lymphocytes
Lymphocytes B
Lymphocytes T
Malnutrition
Memory cells
Natural killer cells
Population number
Subpopulations
T cell receptors
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Summary:Aim Malnutrition and infections cause immunological changes in lymphocyte subpopulations and their functionality. We evaluated the activation capacity of lymphocytes and memory cells in 10 well nourished, seven well-nourished infected and eight malnourished infected children before and after treatment. Methods All the children were patients in Mexico City and were less than three years of age. The expression of various cluster of differentiation (CD) cells was assessed by flow cytometry: CD45RA (naïve) and CD45RO (memory) antigens on CD4 lymphocytes and CD69 in all lymphocytes. Results Well-nourished infected children showed a higher percentage of activated T lymphocyte (T cells), CD8+ and CD4+ memory cells during the infectious phase, suggesting that the activation mechanisms were triggered by infection. T cells from malnourished infected children showed a lower percentage of activated and memory cells. The T cell population size returned to baseline during the resolution phase of the infection in well-nourished infected children, but their T, B lymphocyte and natural killer (NK) cell counts remained high. In malnourished infected children, activated NK cells counts were low before and after therapy. Conclusion After therapy, malnourished infected children showed poor NK cell responses during the infection's resolution phase, suggesting a persistent malnutrition-mediated immunological deficiency.
ISSN:0803-5253
1651-2227
DOI:10.1111/apa.13930