# The Role of the IL-1 Receptor in the AKI to CKD transition

> **NIH NIH K08** · DUKE UNIVERSITY · 2020 · $187,854

## Abstract

ABSTRACT
 Multi-organ dysfunction syndrome (MODS) leads to significant morbidity and mortality in critically ill patients.
Acute kidney injury (AKI) is one of the most common components of MODS. Unresolved AKI leads to ongoing
renal injury, fibrosis, and subsequent chronic kidney disease (CKD). However, the mechanisms that direct renal
recovery and prevent the AKI to CKD transition are poorly understood. One novel and promising therapeutic
approach is to modulate the functions of macrophages and dendritic cells (DCs) that accumulate in the injured
kidney in order to prevent further injury and fibrosis. Interleukin (IL)-1α/β are canonical pro-inflammatory
cytokines that activate macrophages and DCs after binding to their cell surface receptor, IL-1R1. IL-1R1
activation plays a prominent role in renal healing. However, IL-1R1’s specific effects on macrophage and DC
function following AKI and on the AKI to CKD transition are poorly understood. Based on our preliminary studies,
our central hypothesis is that following AKI, macrophage IL-1R1 activation triggers TNFα (TNF)-dependent renal
cell necroptosis, which directs IL-1R1-dependent migration of DCs to lymph nodes to activate pro-inflammatory
T cells to drive the AKI to CKD transition. We will test our central hypothesis as follows:
 Specific Aim 1: Determine effects of macrophage IL-1R1 activation on TNF-mediated renal cell
 necroptosis following ischemic AKI. Mice with macrophage-specific deletion of IL-1R1 (IL-1R1 MKO) and
 controls (IL-1R1 MWT) will undergo ischemia/reperfusion (I/R)- and septic AKI, and the severity of acute
 kidney damage will be quantified. Renal cell necroptosis will be measured in injured kidneys and in
 macrophage-renal tubular cell (RTC) co-culture. We will employ cell surface phenotyping and single cell
 RNA-seq on sorted leukocytes from injured kidneys to precisely phenotype myeloid cells to determine how
 IL-1R1 activation modulates macrophage polarization and renal injury.
 Specific Aim 2: Elucidate the role of IL-1R1-mediated dendritic cell migration and T cell activation
 during the AKI to CKD transition. Mice with deletion of IL-1R1 in DCs (IL-1R1 DCKO) and controls (IL-1R1
 DCWT) will be subjected to I/R-induced AKI, and at multiple timepoints, the severity of renal damage and
 fibrosis will be compared. We will examine IL-1R1-mediated accumulation of DC subsets in renal lymph
 nodes following I/R and their consequent activation of effector lymphocytes. We will use novel tissue
 cytometry to analyze spatial distribution of DC and T cells within fibrotic areas. Activated DC and T cells will
 be co-cultured with RTC to determine their effect on pro-fibrotic gene expression programs.
 The proposed studies will have a significant positive impact by promoting the development of future targeted
treatments for patients with life-threatening AKI. Together with my training plan, these studies will lay the
foundation for my development as an independent investigator in cri...

## Key facts

- **NIH application ID:** 9895836
- **Project number:** 5K08GM132689-02
- **Recipient organization:** DUKE UNIVERSITY
- **Principal Investigator:** Jamie R Privratsky
- **Activity code:** K08 (R01, R21, SBIR, etc.)
- **Funding institute:** NIH
- **Fiscal year:** 2020
- **Award amount:** $187,854
- **Award type:** 5
- **Project period:** 2019-04-01 → 2024-03-31

## Primary source

NIH RePORTER: https://reporter.nih.gov/project-details/9895836

## Citation

> US National Institutes of Health, RePORTER application 9895836, The Role of the IL-1 Receptor in the AKI to CKD transition (5K08GM132689-02). Retrieved via AI Analytics 2026-05-23 from https://api.ai-analytics.org/grant/nih/9895836. Licensed CC0.

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