4.7 Article

Hypoxia-Inducible Factors and Burn-Associated Acute Kidney Injury-A New Paradigm?

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Publisher

MDPI
DOI: 10.3390/ijms23052470

Keywords

hypoxia; hypoxia-inducible factors; burns; acute kidney injury; oxidative stress

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O-2 deprivation induces stress and oxidative stress. Hypoxia can occur in both physiological and pathological conditions, and severe burns may lead to acute kidney injury. HIFs play a crucial role in cellular responses to hypoxia.
O-2 deprivation induces stress in living cells linked to free-radical accumulation and oxidative stress (OS) development. Hypoxia is established when the overall oxygen pressure is less than 40 mmHg in cells or tissues. However, tissues and cells have different degrees of hypoxia. Hypoxia or low O-2 tension may be present in both physiological (during embryonic development) and pathological circumstances (ischemia, wound healing, and cancer). Meanwhile, the kidneys are major energy-consuming organs, being second only to the heart, with an increased mitochondrial content and O-2 consumption. Furthermore, hypoxia-inducible factors (HIFs) are the key players that orchestrate the mammalian response to hypoxia. HIFs adapt cells to low oxygen concentrations by regulating transcriptional programs involved in erythropoiesis, angiogenesis, and metabolism. On the other hand, one of the life-threatening complications of severe burns is acute kidney injury (AKI). The dreaded functional consequence of AKI is an acute decline in renal function. Taking all these aspects into consideration, the aim of this review is to describe the role and underline the importance of HIFs in the development of AKI in patients with severe burns, because kidney hypoxia is constant in the presence of severe burns, and HIFs are major players in the adaptative response of all tissues to hypoxia.

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