title: Impact of iron deficiency anaemia on T lymphocytes & their subsets in children.
abstract: OBJECTIVE
  While there is evidence of an altered immune profile in iron deficiency, the precise immunoregulatory role of iron is not known. Information particular in children who are vulnerable to iron deficiency and infection, is lacking. We undertook this study with the aim of documenting the changes in T cell subsets in children in the age group of 1 to 5 yr with iron deficiency.
  
  
  METHODS
  The levels of T lymphocytes, their CD4+ and CD8+ subsets and the CD4 : CD8 ratio were evaluated in 40 iron deficient and 30 healthy children. The impact of oral iron supplementation for three months on the same parameters was also noted in 30 children.
  
  
  RESULTS
  Significantly lower levels of T lymphocytes as well as CD4+ cells was observed in the iron deficient children (P<0.01 and 0.002 respectively). The CD4 : CD8 ratio was also significantly lower in this group (P<0.05). Iron supplementation improved the CD4 counts significantly.
  
  
  CONCLUSIONS
  Our study demonstrated quantitatively altered T cell subsets in iron deficiency in children, and a relationship between the severity of haematological and immunological compromise. The clinical and epidemiological implications of this relationship have topical relevance since ID is the most common micronutrient deficiency worldwide.
authors.affiliation: Department of Pathology, St John's Medical College, Bangalore, India.
authors.forename: Shalini
authors.initials: S
authors.lastname: Mullick
authors.forename: Usha
authors.initials: U
authors.lastname: Rusia
authors.forename: Meera
authors.initials: M
authors.lastname: Sikka
authors.forename: M A
authors.initials: MA
authors.lastname: Faridi
mesh_terms: D018798:Anemia, Iron-Deficiency / Q000276:immunology*; D017252:CD3 Complex / Q000032:analysis; D018791:CD4 Lymphocyte Count; D016516:CD4-CD8 Ratio; D002675:Child, Preschool; D006801:Humans; D007111:Immunity, Cellular; D007223:Infant; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D017252:CD3 Complex