Related Experiment Video
Updated: Aug 1, 2026
10:00
High-throughput Quantitative Real-time RT-PCR Assay for Determining Expression Profiles of Types I and III Interferon Subtypes
Published on: March 24, 2015
13.5K
Direct type I interferon signaling in hepatocytes controls malaria
Camila Marques-da-Silva1, Kristen Peissig1, Michael P Walker2
1Department of Cellular Biology, University of Georgia, Athens, GA, USA; Center for Tropical and Emerging Global Diseases, University of Georgia, Athens, GA, USA.
Cell Reports
|July 20, 2022
Summary
Type I interferons directly control malaria by signaling in infected liver cells. The study reveals innate, cell-autonomous immunity in hepatocytes, offering new avenues for malaria treatments and vaccines.
Area of Science:
- Immunology
- Infectious Diseases
- Hepatology
Background:
- Malaria, caused by Plasmodium parasites, requires liver stage development before red blood cell infection.
- Type I interferons (IFNs) are implicated in innate immune control of Plasmodium in the liver, but the mechanisms are unclear.
- Understanding these mechanisms is crucial for developing novel anti-malarial strategies.
Purpose of the Study:
- To elucidate the role of type I IFN signaling in hepatocytes during Plasmodium infection.
- To investigate potential cell-autonomous immune responses within infected hepatocytes.
- To challenge existing paradigms in Plasmodium immunobiology.
Main Methods:
- Transcriptomic analysis of infected hepatocytes.
- Infection studies using Plasmodium parasites.
- Utilizing a transgenic Plasmodium strain engineered for Cre recombinase export and trafficking.
Main Results:
- Direct type I IFN signaling in Plasmodium-infected hepatocytes is essential for controlling malaria.
- A significant proportion of infected hepatocytes exhibit natural clearance of Plasmodium infection.
- Evidence suggests the existence of cell-autonomous anti-malarial immune responses in hepatocytes.
Conclusions:
- Type I IFN signaling directly within hepatocytes is a critical host defense mechanism against Plasmodium.
- Infected hepatocytes possess intrinsic capabilities to eliminate malaria parasites.
- These findings provide a foundation for developing new anti-malarial therapies and vaccines targeting liver-stage immunity.
Related Concept Videos
01:29Malaria
Malaria pathogenesis in humans reflects a delicate interplay between parasite biology and host response. Clinical illness reflects a host’s immune response to the parasite’s asexual replication cycle, which is often asymptomatic in individuals with partial immunity. From the parasite's perspective, transmission between mosquito and human with minimal host pathology is evolutionarily advantageous. Among the six Plasmodium species infecting humans, P. falciparum and P. vivax dominate in global...
01:30Inhibitors of Viral Protein Synthesis
Protein synthesis is indispensable for viral replication, as viruses lack the cellular machinery required for this process and must hijack the host's translational apparatus. In response, host cells deploy a critical innate immune defense involving interferons, specialized cytokines that play a central role in inhibiting viral propagation.Upon viral detection, infected cells release interferons that bind to receptors on adjacent uninfected cells, activating the JAK-STAT signaling pathway and...