Type 2 immunity is maintained during cancer associated adipose tissue wasting
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ABSTRACT:
PROVIDER: PRJNA719394 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR14136106_1.fastq.gz | Fastqsanger.gz | |||
| SRR14136106_2.fastq.gz | Fastqsanger.gz | |||
| SRR14136107_1.fastq.gz | Fastqsanger.gz | |||
| SRR14136107_2.fastq.gz | Fastqsanger.gz | |||
| SRR14136108_1.fastq.gz | Fastqsanger.gz |
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Project description:Purpose: Cachexia is a metabolic phenotype affecting many cancer patients. The immune environment in adipose tissue during the development of cancer associated cachexia has not been characterized. To help address this gap, we isolated visceral adipose tissue from cancer-bearing and sham-operated mice and performed bulk RNA-sequencing. Methods: mRNA expression was evaluated by RNA-sequencing in visceral adipose tissue (VAT) of 10-week old mice which had been subjected to sham surgery (sham) or had received orthotopic pancreatic tumors four weeks prior to harvest (KPC). Paired-end 150 bp single-index sequencing was performed using an Illumina HiSeq system. Transcript quantification was performed with Salmon, using quasi-mapping mode with selective alignment (validateMappings). We set the rangeFactorizationBins to 4 and passed both the seqBias and gcBias flags to correct for sequence-specific bias and fragment-level GC bias, respectively. Transcript quantifications were collapsed to gene-level quantifications using the tximport package and the Ensembl based annotation package EnsDb.Mmusculus.v79. Differential expression analysis was then performed using DESeq2 with fold change shrinkage by ashr. For downstream analysis and visualization, only genes with a mean TPM (transcripts per million) > 2 in VAT from both sham-operated and tumor-bearing mice were considered. Results: We identified over 11,000 genes which were expressed at an average of at least 2 TPM (transcripts per million) in both the sham and KPC adipose tissue samples. Differential expression analysis with DESeq revealed 161 upregulated genes (p < 0.05) and 27 downregulated genes (p < 0.05) in the adipose tissue of cancer bearing mice compared to that of sham operated mice. Gene set enrichment analysis suggested an increase in inflammatory pathways, including type 1 and type 2 interferon pathways, in the adipose tissue of cancer bearing mice. Conclusions: This study represents a comprehensive characterization of adipose tissue in the healthy vs. cachexia setting. The RNA-seq data suggests increased immune infiltration into adipose tissue in the setting of a distant pancreatic tumor. Together with flow cytometry and cytokine abundance analyses, we conclude that reguatory Th2 immunity is maintained in the adipose tissue during this model of cancer associated cachexia.
2021-04-03 | GSE171402 | GEO
Project description:ObjectivesCachexia is a systemic metabolic disorder characterized by loss of fat and muscle mass, which disproportionately impacts patients with gastrointestinal malignancies such as pancreatic cancer. While the immunologic shifts contributing to the development of other adipose tissue (AT) pathologies such as obesity have been well described, the immune microenvironment has not been studied in the context of cachexia.MethodsWe performed bulk RNA-sequencing, cytokine arrays, and flow cytometry to characterize the immune landscape of visceral AT (VAT) in the setting of pancreatic and colorectal cancers.ResultsThe cachexia inducing factor IL-6 is strongly elevated in the wasting VAT of cancer bearing mice, but the regulatory type 2 immune landscape which characterizes healthy VAT is maintained. Pathologic skewing toward Th1 and Th17 inflammation is absent. Similarly, the VAT of patients with colorectal cancer is characterized by a Th2 signature with abundant IL-33 and eotaxin-2, albeit also with high levels of IL-6.ConclusionsWasting AT during the development of cachexia may not undergo drastic changes in immune composition like those seen in obese AT. Our approach provides a framework for future immunologic analyses of cancer associated cachexia.
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Project description:Rodents exposed to the environmental contaminant, TCDD, suffer from a number of acute and chronic toxicities, including lethality and a wasting syndrome. Hypothesizing that the wasting syndrome may be caused by changes in adipose tissue -- either in its hormonal regulation or in homeostatic effects -- we profiled the transcriptional response of rat white adipose to TCDD. We employed two separate rat strains: the Long-Evans strain is sensitive to TCDD toxicities while the Han/Wistar strain is over four orders of magnitude more resistant. One day after TCDD exposure few genes were altered in either strain, but after four days a modest number of transcriptional alterations were observed. Strikingly, TCDD had far fewer effects than did a feed-restriction protocol intended to mimic the wasting syndrome itself. Notably several classic TCDD-responsive genes were modulated at all time-points, including Cyp1a1, Cyp1b1, and Nqo1. We therefore concluded that rat adipose tissue is unlikely to be the primary driver of the wasting syndrome, and that another tissue is likely involved. Two strains, each with drug-treated vs. vehicle-control
2010-05-19 | E-GEOD-18301 | biostudies-arrayexpress
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2009-03-07 | E-GEOD-14363 | biostudies-arrayexpress
Project description:In the skin, Trypanosoma brucei colonises the subcutaneous white adipose tissue (WAT) and harbours a pool of parasites competent for forward transmission. The interaction between parasites, adipose tissue, and the local immune system is likely to drive adipose tissue wasting and weight loss observed in cattle and humans infected with T. brucei. However, mechanistically, this process is not fully understood. Here, using several complementary approaches including mass cytometry by time of flight, bulk and single cell transcriptomics, we found that T. brucei infection drives a local expansion of several IL-17A-producing cells in the murine WAT, including TH17 and V6+ T cells. We also found that global IL-17 deficiency, or mice lacking IL-17 receptor expression specifically on adipocytes, were protected from infection-induced WAT wasting and weight loss. Unexpectedly, we found that abrogation of IL-17 signalling on adipocytes results in higher burden of extravascular parasites in the WAT. Taken together, our study highlights the central role of IL-17 signalling on adipocytes in controlling WAT responses to infection, suggesting that adipocytes are a critical coordinator of the tissue immune response to T. brucei infection.
2023-05-27 | GSE233311 | GEO
Project description:In the skin, Trypanosoma brucei colonises the subcutaneous white adipose tissue (WAT) and harbours a pool of parasites competent for forward transmission. The interaction between parasites, adipose tissue, and the local immune system is likely to drive adipose tissue wasting and weight loss observed in cattle and humans infected with T. brucei. However, mechanistically, this process is not fully understood. Here, using several complementary approaches including mass cytometry by time of flight, bulk and single cell transcriptomics, we found that T. brucei infection drives a local expansion of several IL-17A-producing cells in the murine WAT, including TH17 and V6+ T cells. We also found that global IL-17 deficiency, or mice lacking IL-17 receptor expression specifically on adipocytes, were protected from infection-induced WAT wasting and weight loss. Unexpectedly, we found that abrogation of IL-17 signalling on adipocytes results in higher burden of extravascular parasites in the WAT. Taken together, our study highlights the central role of IL-17 signalling on adipocytes in controlling WAT responses to infection, suggesting that adipocytes are a critical coordinator of the tissue immune response to T. brucei infection.
2023-05-27 | GSE233312 | GEO
Project description:We studied the role of the cAMP responsive factor CREB in promoting insulin resistance following its activation in adipose under obese conditions We identified genes that were upregulated in primary cultures of mouse adipocytes following exposure to forskolin; and we characterized genes that are also induced in white adipose tissue in mice maintained on a high fat diet. Keywords: signaling study
2009-03-03 | GSE14363 | GEO
Project description:Rodents exposed to the environmental contaminant, TCDD, suffer from a number of acute and chronic toxicities, including lethality and a wasting syndrome. Hypothesizing that the wasting syndrome may be caused by changes in adipose tissue -- either in its hormonal regulation or in homeostatic effects -- we profiled the transcriptional response of rat white adipose to TCDD. We employed two separate rat strains: the Long-Evans strain is sensitive to TCDD toxicities while the Han/Wistar strain is over four orders of magnitude more resistant. One day after TCDD exposure few genes were altered in either strain, but after four days a modest number of transcriptional alterations were observed. Strikingly, TCDD had far fewer effects than did a feed-restriction protocol intended to mimic the wasting syndrome itself. Notably several classic TCDD-responsive genes were modulated at all time-points, including Cyp1a1, Cyp1b1, and Nqo1. We therefore concluded that rat adipose tissue is unlikely to be the primary driver of the wasting syndrome, and that another tissue is likely involved.
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2021-04-01 | GSE133979 | GEO