Inflammation in acute kidney injury

Area of Science:

• Nephrology
• Immunology
• Pathophysiology

Background:

• Ischemia-reperfusion injury (IRI) is a primary cause of acute kidney injury (AKI).
• Both innate and adaptive immune responses are increasingly recognized as critical contributors to renal IRI.
• Kidney cells, including endothelial and tubular epithelial cells, actively participate in the inflammatory cascade post-IRI.

Purpose of the Study:

• To review recent advancements in understanding the immune mechanisms underlying renal IRI.
• To elucidate the roles of various immune cells and kidney cells in AKI pathogenesis.
• To highlight the complex interplay between innate and adaptive immunity in renal IRI.

Main Methods:

• This study is a review of current literature on renal IRI and immune responses.
• It synthesizes findings on the involvement of leukocytes, endothelial cells, and tubular epithelial cells.
• The review examines the activation and function of dendritic cells, neutrophils, macrophages, T cells, B cells, and NKT cells.

Main Results:

• Kidney endothelial cells enhance inflammation by increasing adhesion molecules and vascular permeability.
• Kidney tubular epithelial cells contribute to inflammation via complement binding and toll-like receptor upregulation, leading to cytokine production.
• Multiple immune cell types, including neutrophils, macrophages, T cells, B cells, and NKT cells, are implicated in AKI development.

Conclusions:

• The immune system, encompassing both innate and adaptive components, plays a pivotal role in the pathogenesis of AKI following IRI.
• Recent research has significantly advanced the understanding of these complex immune interactions.
• Further research into these immune mechanisms is essential for developing targeted therapies for AKI.