Publications by authors named "S S Wideman"

Malaria and iron deficiency are major global health problems with extensive epidemiological overlap. Iron deficiency-induced anaemia can protect the host from malaria by limiting parasite growth. On the other hand, iron deficiency can significantly disrupt immune cell function.

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Generation of mature cells from progenitors requires tight coupling of differentiation and metabolism. During erythropoiesis, erythroblasts are required to massively upregulate globin synthesis then clear extraneous material and enucleate to produce erythrocytes. has remained in synteny with the α-globin genes for >500 million years, and harbours the majority of the α-globin enhancers.

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Lipids play a major role in inflammatory diseases by altering inflammatory cell functions, either through their function as energy substrates or as lipid mediators such as oxylipins. Autophagy, a lysosomal degradation pathway that limits inflammation, is known to impact on lipid availability, however, whether this controls inflammation remains unexplored. We found that upon intestinal inflammation visceral adipocytes upregulate autophagy and that adipocyte-specific loss of the autophagy gene Atg7 exacerbates inflammation.

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Low plasma iron (hypoferremia) induced by hepcidin is a conserved inflammatory response that protects against infections but inhibits erythropoiesis. How hypoferremia influences leukocytogenesis is unclear. Using proteomic data, we predicted that neutrophil production would be profoundly more iron-demanding than generation of other white blood cell types.

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Article Synopsis
  • Iron deficiency is the most prevalent micronutrient deficiency globally, and its impact on immunity, especially adaptive immunity, is unclear, prompting the study of its effects through various experimental models.* -
  • Research demonstrated that low iron levels, caused by increased hepcidin, significantly hinder immune responses to vaccinations and viral infections in both animal models and humans, indicating a critical role of iron in T cell and antibody function.* -
  • The findings suggest that while hypoferremia serves as an innate response to infection, it can negatively affect the development of adaptive immunity, highlighting the need to address iron deficiency to enhance vaccine efficacy and overall immune health in various populations.*
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