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RNA-seq analysis in residual pancreatic β-cells of Bmal1KO/DTA mice following massive ablation

ABSTRACT: RNA-seq analysis in residual pancreatic β-cells of Bmal1KO/DTA mice following massive ablation

PROVIDER: PRJNA635560 | ENA |

REPOSITORIES: ENA

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RNA-seq analysis in residual pancreatic β-cells of Bmal1KO/DTA mice following massive ablation

Project description:We aimed to fill the gap in understanding functional roles of the islet cellular oscillators under diabetic conditions following massive β-cell ablation, and during β-cell regeneration. We assessed diurnal regulation of β-cell proliferation and transcriptional landscape in separated α- and residual β-cells -utilizing rtTA/TET-DTA mouse model that bears α- and β-cell specific labeling. Acute hyperglycemia and loss of β-cell mass perturbed absolute expression levels and temporal transcriptome profiles in residual β-cells, whereas in neighboring α-cells only changes in temporal profiles were observed. Strikingly, compensatory regeneration of β-cells exhibited circadian rhythmicity. In arrhythmic BMAL1 knockout mice, massive β-cell ablation led to aggravated hyperglycemia, hyperglucagonemia and a fatal non-compensated diabetes. No activation of β-cell regeneration via entry into cell-cycle was observed in arrhythmic mice, suggesting essential role of functional circadian clocks in this process.

2020-10-01 | GSE151338 | GEO

Circadian clocks drive regeneration of pancreatic β-cells in mice

Project description:We aimed to understand the functional roles of islet cellular oscillators under diabetic conditions and during β-cell regeneration. We assessed diurnal regulation of β-cell proliferation and the transcriptional landscape in α- and residual β-cells following β-cell ablation in Insulin-rtTA/TET-DTA mice that simultaneously expressed α- and β-cell specific fluorescent reports. The mouse pancreatic islets were isolated over 24-h with 4-h interval, followed by separation of α- and β- cells using FACS sorting, RNA extraction and RNA sequencing. Acute hyperglycemia and loss of β-cell mass perturbed absolute expression levels and temporal transcriptome profiles in residual β-cells, whereas in neighboring α-cells only changes in temporal profiles were observed. Strikingly, compensatory regeneration of β-cells exhibited circadian rhythmicity. In arrhythmic Bmal1 deficient mice, massive β-cell ablation led to aggravated hyperglycemia, hyperglucagonemia and a fatal diabetes. No compensatory proliferation of β-cells was observed in arrhythmic mice, suggesting an essential role of circadian clocks in β-cell regeneration.

2020-10-16 | GSE152751 | GEO

Lhx8 ablation leads to massive autophagy of mouse oocytes associated with DNA damage

Project description:Lhx8 ablation leads to massive autophagy of mouse oocytes associated with DNA damage

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Stage-specific transcriptomic changes in α-cells after massive β-cell loss

Project description:Conversion of α-cells into insulin-producers upon β-cell loss is modulated by constitutive signals ensuring α-cell identity maintenance. Here, we characterized the plasticity of mouse α-cells by profiling their transcriptome at different time-points after massive β-cell ablation. Our results show that α-cells undergo stage-specific transcriptional changes 5- and 15-days post-diphtheria toxin (DT)-mediated β-cell ablation. At 5 days, α-cells transiently upregulate various genes associated with interferon signaling and proliferation, including Interferon Induced Protein with Tetratricopeptide Repeats 3 (Ifit3). Subsequently, at 15 days post β-cell ablation, α-cells undergo a transient downregulation of genes from several pathways including Insulin receptor, mTOR and MET signaling. These results pinpoint novel markers discriminating α-cells at different stages after acute β-cell loss, and highlight additional signaling pathways that could be involved in reprogramming the functional identity of α-cells.

2021-04-27 | GSE155519 | GEO

Fludeoxyglucose F 18-PET Imaging for Early Detection of Residual Disease in Patients Undergoing Radiofrequency Ablation of Liver Metastases From Colorectal Cancer

Project description:RATIONALE: Diagnostic procedures, such as fludeoxyglucose F 18-PET imaging, may be effective in detecting residual disease after radiofrequency ablation of liver metastases in patients with colorectal cancer. PURPOSE: This clinical trial is studying fludeoxyglucose F 18-PET imaging to see how well it works for early detection of residual disease in patients undergoing radiofrequency ablation of liver metastases from colorectal cancer.

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Screen of differential expressed genes from residual MHCC97H treated by POSTN or not

Project description:Incomplete thermal ablation may induce invasiveness of hepatocellur carcinoma, however, the mechasim is not fully understood. Here, we investigated whether activated hepatic stellate cells would accelerate the progression of residual HCC after sublethal heat treatment via the secretion of POSTN. We used microarrays to detail the global programme of up-regulated genes of residual HCC cells induced by POSTN.

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Expression data during plantaris muscle hypertrophy with/without satellite cells induced by synergist ablation in young adult Pax7-DTA mice

2014-02-20 | GSE52597 | GEO

Expression data during plantaris muscle hypertrophy with/without satellite cells induced by synergist ablation in young adult Pax7-DTA mice

Project description:Global gene expression patterns were determined from microarray results from sham surgery or following 1 week of plantaris muscle hypertrophy induced by synergist ablation in young adult Pax7-DTA mice (4 months). Vehicle treated mice have their full complement of satellite cells; tamoxifen treated mice have had their satellite cells genetically depleted through Cre-loxP technology After sham surgery or 1 week of overload, Affymetrix chips (mouse430_2.0) were used with 1 Âµg of total RNA derived from a pooled sample of the right and left plantaris muscles from 11 animals.

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Proteome of Ins1E beta cell line with CerS2 ablation

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2022-09-22 | PXD029848 | Pride

Expression data from muscle samples following synergist ablation

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2016-09-30 | GSE62388 | GEO

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