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Single-cell atlases of Aedes aegypti midgut and fat body reveal cellular and metabolic dynamics after a blood-meal

ABSTRACT: Single-cell atlases of Aedes aegypti midgut and fat body reveal cellular and metabolic dynamics after a blood-meal

PROVIDER: PRJNA1185208 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR31316075_1.fastq.gz	Fastqsanger.gz
	SRR31316075_2.fastq.gz	Fastqsanger.gz
	SRR31316076_1.fastq.gz	Fastqsanger.gz
	SRR31316076_2.fastq.gz	Fastqsanger.gz
	SRR31316077_1.fastq.gz	Fastqsanger.gz

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Single-cell atlases of Aedes aegypti midgut and fat body reveal cellular and metabolic dynamics after a blood-meal

Project description:Aedes aegypti mosquito, vector for several viral diseases, undergoes significant physiological changes after a blood meal. Through single-cell RNA sequencing and metabolomics, we unveiled dynamic cellular composition and metabolic adaptations within abdominal midgut and fat body tissues. We revealed high cell diversity, specialized in digestion, metabolism, immunity, and reproduction. While the midgut primarily comprises enterocytes, enteroendocrine, cardia and intestinal stem cells, the fat body consists of not only trophocytes and oenocytes, but also a substantial population of hemocytes and fat body-yolk cells (FYC). The fat body, exhibiting a more complex metabolomic profile than the midgut, played a central role in immune and metabolic gene expression, particularly within trophocytes and FYCs. Additionally, insect-specific viruses were detected at the single-cell level, mainly in the midgut at later stages post-blood meal. These findings offer new vector control strategies by targeting specific abdominal cell populations and metabolic pathways involved after a blood meal.

2024-11-17 | GSE281673 | GEO

The midgut transcriptome of Aedes aegypti fed with saline or protein meals containing chikungunya virus reveals genes potentially involved in viral midgut escape

Project description:This study seeks to understand the mechanism of midgut escape and identify candidate genes and potential biochemical pathways involved in the midgut infection of chikungunya virus (CHIKV) in vector mosquito Aedes aegypti. We conducted a comparative transcriptomic analysis of midgut samples of female mosquitoes,after feeding a saline meal (SM) or a protein meal (PM) containing CHIKV. Our results allow the conclusion that midgut-expressed genes not involved in blood or protein digestion can be identified by substituting either a bloodmeal or PM for a SM. In presence of orally acquired CHIKV in midguts of SM fed mosquitoes, the majority of the upregulated DE genes belonged to the categories immune system and catalytic activity. These genes included several serine-type endopeptidases, trypsins, collagenases, and M1 zinc metalloproteases, which potentially could be involved in the midgut escape mechanism of CHIKV. One of the serine metalloproteinase genes, AeLT, was further analyzed showing strong (MMP) collagenase activity in vitro. Our results present a set of candidate genes potentially responsible for overcoming the arbovirus midgut escape barrier (MEB) in Ae. aegypti.

2017-05-17 | GSE95378 | GEO

Transcriptomic analysis of Aedes aegypti midgut epithelial cells upon heme exposure

Project description:The female mosquito Aedes aegypti requires amino acids and other nutrients like heme and iron from a blood meal to initiate vitellogenesis. Heme is a pro-oxidant molecule that acts as a nutrient, signaling molecule and in large quantities, as a toxin. Ae. aegypti has developed a few strategies to handle heme toxicity, as during a typical meal ~10mM is released into the midgut lumen. These strategies include heme aggregation to the peritrophic matrix and the degradation of heme by heme oxygenase in the cytosol of the midgut epithelium. However, despite the importance of heme as a nutrient and toxin, the mechanism of entry into the midgut epithelial cells is not currently known. As no heme transport proteins in have been identified in any dipteran, heme fluorescent analog studies were performed to visualize changes in expression caused by heme followed by global expression analyses performed in midgut tissues using NGS-based RNA sequencing with the end goal to identify the gene(s) that encode the membrane bound heme import proteins responsible for heme uptake during blood digestion. Examination of differential expression of mRNA transcripts at the gene level, found 65 significant DE genes at the adjusted p-value cut off of 0.0001, 38 of which are TM containing and only 2 of which showed high expression changes, AAEL019570 (-2.04 log2, ~0.243), unknown function, and AAEL000717 (3.91 log2, ~15.03), a protocadherin. This list was further reduced to 16 genes with potential heme import function and 7 genes with potential heme export function by examination of differential expression, number of TM domains and function relating to transport. As very few highly differentially expressed genes were found in the analysis, heme import may be controlled by a redundant system of multiple transport proteins instead of a single highly expressed one. Alternatively, heme transport in Ae. aegypti could be regulated post-translationally.

2020-08-03 | GSE141651 | GEO

Aedes aegypti response to bloodfeeding and bacterial ingestion in midgut tissues of females from two strains

Project description:Rockefeller and Singapore strain Aedes aegypti female mosquitoes differ in the number of bacteria present in the midgut. Females from each strain were either maintained on 3% sucrose solution, fed a sterile blood meal, or fed a blood meal containing a cocktail of bacteria. Differential transcript abundance was compared between females from each strain/treatment combination and a common reference sample pool. The overall goal was to determine how gene expression in Rockefeller females differs from Singapore females in order to better understand why the gut microbiome differs between the strains.

2017-06-09 | GSE99799 | GEO

SAGE analysis reveals variation in midgut transcriptomes of dengue-2 susceptible and refractory Aedes aegypti mosquitoes

Project description:Oral susceptibility of Aedes aegypti mosquitoes to dengue viruses varies between different Aedes species and strains. However, the midgut-specific transcriptional profile that may produce this variation is presently obscure and was the subject of our investigation. The variation in active expression between dengue-2 susceptible (SUS) and refractory (REF) mosquitoes was investigated during the first critical 96 hours after infection Transcriptional profiles were mined from respective guts using the serial analysis of gene expression technique (SAGE) and libraries constructed from midguts obtained from mosquitoes that received a dengue-2 infected blood meal (DENV-2), a non infected blood meal (naive) or a 5% sucrose meal (SM). Here we report that variation between DENV-2 infected libraries versus respective naÃ¯ve libraries revealed very few transcripts that were common and statistically significant in DENV-2 infected libraries. In addition, the expression profiles among libraries displayed up regulation of antisense transcripts especially in the SUS strain. A strong proclivity towards strain-specificity in differential expression was observed, which suggested an exclusive transcription that is likely up-regulated after DENV-2 infection Thirty Aedes aegypti female mosquitoes aged 4-5 days were transferred to 500 ml paper cups and offered a 5% sucrose meal (SM), a naÃ¯ve blood meal or a dengue-2 (JAM 1409 strain) infectious blood meal, using standard artificial membrane feeders. Fully engorged females were isolated and maintained on a 5% sucrose solution ad libitum at 26oC and relative humidity till dissection

2013-09-30 | E-GEOD-14384 | biostudies-arrayexpress

A cell atlas of the adult female Aedes aegypti midgut revealed by single-cell RNA sequencing

Project description:Midgut is an important immune organ of Aedes aegypti. To help further studies on host-pathogen interaction of midgut, we established a midgut cell atlas using scRNA-seq.

2023-11-17 | GSE246612 | GEO

RNAseq analysis of blood-meal induced gene-expression changes in Aedes aegypti ovaries

Project description:We report here RNAseq analysis of the comparison of gene expression between sugar fed and blood fed Aedes aegypti ovaries, to understand blood meal induced changes in gene expression.

2020-06-11 | GSE152209 | GEO

The Adult Aedes aegypti Midgut Peritrophic Matrix Proteome

Project description:This study was undertaken to characterize the proteome of the midgut peritrophic matrix of Aedes aegypti.

2018-04-05 | PXD007627 | Pride

A cell atlas of the adult Aedes aegypti midgut revealed by single nucleus RNA-Seq

Project description:Mosquitoes are the most notorious hematophagous insects and due to their blood feeding behavior and genetic compatibility, numerous mosquito species are highly efficient vectors for certain human pathogenic parasites and viruses. The mosquito midgut is the principal organ of blood meal digestion and nutrient absorption. It is also the initial site of infection with blood meal acquired parasites and viruses. We conducted an analysis based on single-nucleus RNA sequencing(snRNA-Seq) to assess the cellular diversity of the midgut and how individual cells respond to blood meal ingestion to facilitate its digestion.

2023-10-17 | GSE245622 | GEO

SAGE analysis reveals variation in midgut transcriptomes of dengue-2 susceptible and refractory Aedes aegypti mosquitoes

Project description:Oral susceptibility of Aedes aegypti mosquitoes to dengue viruses varies between different Aedes species and strains. However, the midgut-specific transcriptional profile that may produce this variation is presently obscure and was the subject of our investigation. The variation in active expression between dengue-2 susceptible (SUS) and refractory (REF) mosquitoes was investigated during the first critical 96 hours after infection Transcriptional profiles were mined from respective guts using the serial analysis of gene expression technique (SAGE) and libraries constructed from midguts obtained from mosquitoes that received a dengue-2 infected blood meal (DENV-2), a non infected blood meal (naive) or a 5% sucrose meal (SM). Here we report that variation between DENV-2 infected libraries versus respective naïve libraries revealed very few transcripts that were common and statistically significant in DENV-2 infected libraries. In addition, the expression profiles among libraries displayed up regulation of antisense transcripts especially in the SUS strain. A strong proclivity towards strain-specificity in differential expression was observed, which suggested an exclusive transcription that is likely up-regulated after DENV-2 infection

2013-09-30 | GSE14384 | GEO

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