H-2 complex influences cytokine gene expression in Leishmania infantum-infected macrophages

Olivia Roos Rodrigues, Rita Aguiar Moura, Sandra Gomes-Pereira, Gabriela Maria Santos-Gomes

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


This work aims to study the influence of H-2 locus in the control of Leishmania infantum infection by evaluating whether cytokine responses by host macrophages of different H-2 haplotype are differentially regulated, either induced or actively impaired during parasite growth and replication. This study shows that macrophages of "non-cure" phenotype (H-2d) are more susceptible to infection with virulent L. infantum promastigotes. Virulent parasites lead to impaired IL-12 and inhibited TNF-α expression. The degree of parasite virulence is an important contributing factor to differences detected in cytokine expression. Virulent parasites also induced TGF-β, a deactivating cytokine that is known to suppress Th-1 type responses, thus allowing the parasite to subvert antimicrobial activity and increase its chances of survival. Depending on specific host haplotype, cells differentially respond to infection since TNF-α expression is inhibited and TGF-β is enhanced by macrophages of "non-cure" phenotype, thus perhaps determining their degree of susceptibility in this strain of mice.

Original languageEnglish
Pages (from-to)118-126
Number of pages9
JournalCellular Immunology
Issue number2
Publication statusPublished - Oct 2006


  • Bone marrow derived-macrophages
  • Cytokines
  • H-2 haplotype
  • Leishmania infantum
  • Parasite virulence


Dive into the research topics of 'H-2 complex influences cytokine gene expression in Leishmania infantum-infected macrophages'. Together they form a unique fingerprint.

Cite this