Abstract
The hypoxic preconditioning of mammalian cells has been shown to have beneficial effects against hypoxic injuries. However, very little information is available on the comparative analysis of immunological responses to hypoxic and hypoxia mimetic exposure. Therefore, in the present study, mouse peritoneal macrophages and splenocytes were subjected to hypoxia exposure (0.5 % O2) and hypoxia mimetic Cobalt chloride (CoCl2) treatment to evaluate their effect on immune response and delineate the underlying signaling mechanisms. The results obtained indicated that super oxide generation increased while TLR4 expression and cell surface markers like CD25, CD40 and CD69 were suppressed in both the treatments as compared to normoxia. Cobalt chloride treatment increased NF-κB expression, nitric oxide (NO) and iNOS expression, cytokines TNF-α and IL-6 as compared to hypoxia exposure. Our study showed that CoCl2 stabilizes HIF-1α to create hypoxia like conditions but it mainly influences the inflammatory response via NF-κB signaling pathway by skewing the production of proinflammatory molecules like TNF-α, IL-6 and NO.
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This work was supported by a Grant from the Defence Research and Development Organization (DRDO), Ministry of Defence, Government of India. Shweta thanks DRDO for financial assistance in the form of Senior Research Fellowship.
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Shweta, Mishra, K.P., Chanda, S. et al. A comparative immunological analysis of CoCl2 treated cells with in vitro hypoxic exposure. Biometals 28, 175–185 (2015). https://doi.org/10.1007/s10534-014-9813-9
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DOI: https://doi.org/10.1007/s10534-014-9813-9