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Host-Pathogen Interactions in the Plasmodium-Infected Mouse Liver at Spatial and Single-Cell Resolution (VISIUM)

ABSTRACT: During liver infection, the malaria parasite undergoes massive replication whilst remaining clinically silent. Spatial coordination of immune response regulation and metabolic zonation during malaria infection in the true tissue context remains unexplored. We perform spatial transcriptomics combined with snRNA-seq over multiple time points to delineate transcriptional programs of host-pathogen interactions across P. berghei-infected liver tissues. Our data suggest changes in gene expression related to lipid metabolism adjacent to infected hepatocytes, particularly modulation of the expression of genes involved in peroxisome proliferator-activated receptor pathway signaling. The data further indicates the presence of inflammatory hotspots with differential inflammation programs along the lobular axis in infected tissues. Additionally, upregulation of genes involved in inflammation is observed, but considerably delayed, in livers of control mice injected with mosquito salivary gland components. Our study establishes a benchmark for investigating host-parasite interactions, and can easily be implemented to validate de novo malaria drug and vaccine efforts.

ORGANISM(S): Mus musculus Plasmodium berghei ANKA

PROVIDER: GSE268068 | GEO | 2024/06/03

REPOSITORIES: GEO

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Project description:After entering their mammalian host via the bite of an Anopheles mosquito, Plasmodium sporozoites migrate to the liver where they traverse several hepatocytes before invading the one inside which they will develop and multiply into thousands of merozoites. Although this constitutes an essential step in malaria infection, the requirements of Plasmodium parasites in liver cells and how they use the host cell for their own survival and development are poorly understood. To gain new insights into the molecular host-parasite interactions that take place during malaria liver infection, we have used high-throughput microarray technology to determine the transcriptional profile of P. yoelii-infected hepatocytes that were collected from P. yoelii-infected mice 24 and 40 h after infection. This in vivo microarray expression was compared with the microarray analysis of in vitro infected hepatoma cells infected with closely related rodent malaria parasite P. berghei. Differential expression patterns for host genes identify genes and pathways involved in the host response to rodent Plasmodium parasites. Keywords: gene expression Total RNA from sorted liver stage (LS) infected hepatocytes were isolated from PyGFP-infected BALB/c mice as described in Tarun et al (2008). RNA from LS-infected hepatocytes were isolated at two time points post-infection (pi): 24 hr pi (LS24) and 40 hr pi (LS40). As control, RNA from hepatocytes isolated from mock-infected mice (infected with salivary gland extract) at the same time points was also isolated following the same procedure. Total RNA was then subjected to two rounds of linear amplification using the Amino Allyl Message Amp II aRNA Amplification Kit (Ambion) according to manufaturerâs directions. The quality of total and amplified RNAs were examined with the Agilent 2100 BioanalyzerTM (Agilent Technologies) and the quantity of the RNA samples was assessed using a Nanodrop ND-1000 spectrophotometer prior to microarray hybridization. For each timepoint two independent biological replicates were obtained.

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Host-Pathogen Interactions in the Plasmodium-Infected Mouse Liver at Spatial and Single-Cell Resolution (VISIUM)

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