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Last Updated: 07/06/2023

Malaria associated pathogenesis of chronic kidney disease (MAP-CKD)

Objectives

The main objective of this project is to evaluate the malaria-associated pathogenesis (MAP) of acute and chronic kidney disease (CKD) after severe malaria.

Two specific aims will be pursued to evaluate the malaria-associated pathogenesis of acute and chronic kidney disease (MAP-CKD) after severe malaria.

  1. Aim 1: the project will determine the clinical risk factors associated with CKD, including the severity and duration of AKI as well as a poorly understood complication of malaria called blackwater fever. Also the genetic risk factors for CKD in children over follow-up will be evaluated, focusing on genes linked to kidney disease (e.g., APOL1) or protection from severe malaria (e.g., sickle cell anemia).
  2. Aim 2: the focus will be on defining mechanisms of maladaptive repair following AKI by measuring biomarkers in children’s blood and urine over follow-up. These studies will have the potential to uncover pathways of maladaptive repair following AKI that lead to the development of CKD and are amenable to intervention.

The long-term goal of this project is to prevent children from developing CKD. These studies will achieve this goal by allowing us to identify children at the highest risk of CKD, providing clinical follow-up and early treatment for CKD. Secondly, by determining the maladaptive nature of the healing process, we will be able to use biomarkers to identify children at risk of CKD. Third, these studies have the potential to identify treatments to promote adaptive renal repair and reduce CKD development. Collectively, the proposed research will provide new insights into kidney disease in malaria and may provide novel insights into mechanisms of maladaptive repair in other conditions characterized by intravascular hemolysis and AKI. The results from this study will help define the burden of CKD following AKI in low-and-middle-income countries, where 80% of global AKI deaths occur.

Principal Investigators / Focal Persons

Andrea Conroy

Rationale and Abstract

Acute kidney injury (AKI) is an abrupt loss of kidney function that occurs in 25-59% of children hospitalized with severe malaria. AKI is one of the strongest risk factors for death in children with severe malaria and is associated with long-term cognitive and kidney problems. Following injury, the kidney undergoes a repair process to restore normal kidney function. If the repair process goes awry and is ‘maladaptive’, it can lead to persistent kidney injury and chronic kidney disease (CKD). Previous studies showed an increased risk of CKD in severe malaria survivors. These results led to the central hypothesis that persistent activation of pathways associated with severe malaria associated-AKI contributes to maladaptive repair following AKI and increases CKD risk. Towards this hypothesis, there is preliminary data showing that persistent immune activation and signs of altered blood vessel function are associated with persistent kidney disease at one-month follow-up. An estimated 15.6% of Ugandan children have persistent kidney injury after severe malaria with 17.5% of children with persistent kidney injury dying within one-year follow-up compared to 3.7% without AKI. Guided by strong preliminary data, a prospective multi-site observational cohort study will be conducted to follow 750 Ugandan children, 90 days to 15 years of age, hospitalized with severe malaria to assess the incidence of CKD. The project will also enroll 189 community children of the same age to define the incidence of CKD in Ugandan children.

Thematic Categories

Basic Science

Date

Jun 2022 — May 2027

Total Project Funding

$644,039

Project Site

Uganda

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