Homo sapiens
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ABSTRACT:
PROVIDER: PRJNA121811 | ENA |
REPOSITORIES: ENA
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Project description:To investigate the effects of bariatric surgery on gene expression profile changes in whole blood in obese subjects with type 2 diabetes in a pilot study setting. Whole blood from eleven obese subjects with type 2 diabetes was collected in PAXgene tubes prior to and 6-12 months after bariatric surgery. Total RNA was isolated, amplified, labeled and hybridized to Illumina gene expression microarrays. Clinical and expression data were analyzed using a paired t-test, and correlations between changes in clinical trait and transcript levels were calculated. Pathways were identified using Ingenuity Pathway Analysis and DAVID gene ontology software. Bariatric surgery resulted in significant reduction of BMI, fasting plasma glucose and normalization of HbA1c levels. The expression levels of 204 transcripts, representing 200 unique genes, were significantly altered after bariatric surgery. Among the significantly regulated genes were GGT1, CAMP, DEFA1, LCN2, TP53, ZNF684, GPR50, PDSS1, OLR1, CNTNAP5, DHCR24, HHAT and SARDH, which have been previously implicated in lipid metabolism, obesity and/or type 2 diabetes. The changes in expression of seven transcripts, WDR35, FLF45244, DHCR24, TIGD7, TOPBP1, TSHZ1, and FAM8A1 were strongly correlated with the changes in body weight, fasting plasma glucose and HbA1c content. These preliminary data suggest that whole blood expression levels of specific transcripts may identify biomarkers associated with susceptibility for type 2 diabetes and/or therapeutic response. Trasncriptome profiling was performed on eleven obese subjects with type 2 diabetes, (5 females and 6 males) to compare expression changes before and 6 to 12 months after the subjects underwent bariatric surgery.
2011-01-06 | E-GEOD-19790 | biostudies-arrayexpress
Project description:To investigate the effects of bariatric surgery on gene expression profile changes in whole blood in obese subjects with type 2 diabetes in a pilot study setting. Whole blood from eleven obese subjects with type 2 diabetes was collected in PAXgene tubes prior to and 6-12 months after bariatric surgery. Total RNA was isolated, amplified, labeled and hybridized to Illumina gene expression microarrays. Clinical and expression data were analyzed using a paired t-test, and correlations between changes in clinical trait and transcript levels were calculated. Pathways were identified using Ingenuity Pathway Analysis and DAVID gene ontology software. Bariatric surgery resulted in significant reduction of BMI, fasting plasma glucose and normalization of HbA1c levels. The expression levels of 204 transcripts, representing 200 unique genes, were significantly altered after bariatric surgery. Among the significantly regulated genes were GGT1, CAMP, DEFA1, LCN2, TP53, ZNF684, GPR50, PDSS1, OLR1, CNTNAP5, DHCR24, HHAT and SARDH, which have been previously implicated in lipid metabolism, obesity and/or type 2 diabetes. The changes in expression of seven transcripts, WDR35, FLF45244, DHCR24, TIGD7, TOPBP1, TSHZ1, and FAM8A1 were strongly correlated with the changes in body weight, fasting plasma glucose and HbA1c content. These preliminary data suggest that whole blood expression levels of specific transcripts may identify biomarkers associated with susceptibility for type 2 diabetes and/or therapeutic response.
2011-01-06 | GSE19790 | GEO
Project description:Bariatric (or metabolic) surgery is the most effective treatment for severe obesity, resulting in sustained weight loss and rapid improvement in metabolic outcomes. However, it is currently unknown what molecular changes are induced by the surgery, how they relate to the health improvements, how early they occur, and whether they are maintained over time. In this study, we characterized early gene expression changes following surgery in blood samples from the “Personalised Medicine for Morbid Obesity” cohort. We observed widespread changes in gene expression only a few days after surgery. Pathways related to immune response were affected, in particular with a decreased expression of the NF-κB pathway and neutrophil cytotoxic activity genes, suggesting a reduction of the inflammatory state typically associated with obesity. Metabolic signaling was also affected, with decreased expression of genes from pathways related to glucagon and insulin secretion, and key regulators such as the appetite-controlling hormone ghrelin. Comparisons to publicly available transcriptomics datasets showed that beyond these specific changes, bariatric surgery induces a transcriptome-wide reversal of expression changes associated with obesity and with forms of type 2 diabetes related to obesity. Comparisons to transcriptomics studies with longer-term follow-ups after bariatric surgery showed that a large fraction of early-induced expression changes likely persist for several months. Taken together, we show that previously unreported early changes in blood gene expression after bariatric surgery provide in-depth insights into the resolution of the chronic inflammation associated with severe obesity and its connection with metabolic improvement.
2025-06-18 | GSE273902 | GEO
Project description:Bariatric surgery, an effective treatment for obesity and diabetes, leads to profound remodeling of whole body energy homeostasis. We utilized a mouse model of vertical sleeve gastrectomy (VSG), a common bariatric surgery as a tool to identify novel secreted proteins and peptides that might act as important metabolic regulators. We analyzed gene expression in the stomach and intestines following VSG or sham surgery in diet-induced obese mice and sought to identify differentially regulated genes encoding secreted proteins/peptides.
2017-10-14 | GSE104956 | GEO
Project description:Bariatric surgery is highly effective for the treatment of obesity in individuals without (OB ) and in those with type 2 diabetes (T2D ). However, whether bariatric surgery triggers similar or distinct molecular changes in OB and T2D remains unknown. Given that individuals with type 2 diabetes often exhibit more severe metabolic deterioration, we hypothesized that bariatric surgery induces distinct molecular adaptations in skeletal muscle, the major site of glucose uptake, of OB and T2D after surgery-induced weight loss. All participants (OB, n=13; T2D, n=13) underwent detailed anthropometry before and one year after the surgery. Skeletal muscle biopsies were isolated at both time points and subjected to transcriptome and methylome analyses using a comprehensive bioinformatic pipeline.
2024-07-17 | GSE272137 | GEO
Project description:Bariatric surgery is highly effective for the treatment of obesity in individuals without (OB ) and in those with type 2 diabetes (T2D ). However, whether bariatric surgery triggers similar or distinct molecular changes in OB and T2D remains unknown. Given that individuals with type 2 diabetes often exhibit more severe metabolic deterioration, we hypothesized that bariatric surgery induces distinct molecular adaptations in skeletal muscle, the major site of glucose uptake, of OB and T2D after surgery-induced weight loss. All participants (OB, n=13; T2D, n=13) underwent detailed anthropometry before and one year after the surgery. Skeletal muscle biopsies were isolated at both time points and subjected to transcriptome and methylome analyses using a comprehensive bioinformatic pipeline.
2024-07-17 | GSE272133 | GEO
Project description:This experiment captures the DNA methylation in obese patients with type 2 diabetes in relevant tissues from the disease: liver, subcutaneous and visceral adipose tissues, and whole blood. Samples were obtained during bariatric surgery and preserved in RNAlater at -70 C in RNAlater, until the nucleic acid extraction.
2018-02-15 | E-MTAB-5291 | biostudies-arrayexpress
Project description:This experiment captures the expression profiling in obese with type 2 diabetes and non-diabetic patients, in relevant tissues from the disease: liver, subcutaneous and visceral adipose tissues, and whole blood. Samples were obtained during bariatric surgery and preserved in RNA later at -70 C until the nucleic acid extraction.
2018-02-15 | E-MTAB-5288 | biostudies-arrayexpress
Project description:We aimed to characterize bariatric surgery-induced transcriptome changes associated with diabetes remission and the predictive role of the baseline transcriptome.
2024-07-09 | GSE271700 | GEO
Project description:Bariatric surgery is associated with improved breast cancer (BC) outcomes, including greater immunotherapy effectiveness in a pre-clinical BC model. A potential mechanism of bariatric surgery-associated protection is through the gut microbiota. Here, we demonstrate the dependency of improved immunotherapy response on the post-bariatric surgery gut microbiome via fecal microbial transplant. Cecal contents were isolated from either obese controls that received sham surgery or formerly obese mice following bariatric surgery-induced weight loss and transferred by FMT to lean recipients. Response to αPD-1 immunotherapy was significantly improved following FMT from formerly obese bariatric-surgery treated mice. Microbes can impact tumor burden through microbially derived metabolites produced or modified by gut microbiota including branched chain amino acids (BCAA). Circulating BCAA correlated significantly with NK T cell content in the tumor microenvironment in both donor mice after bariatric surgery and in FMT recipients of donor cecal content after bariatric surgery compared to obese sham controls. Findings implicate a role of microbially-derived BCAA in activating anti-tumor immunity that is dependent upon bariatric surgery. Importantly, when stool from a patient who exhibited 25% weight loss post-bariatric surgery was transplanted into recipient mice and compared to the patient’s pre-bariatric surgery stool transplant. Patient samples post bariatric surgery significantly reduced tumor burden by 2.4-fold and immunotherapy effectiveness was doubled. Taken together, findings suggest that reinvigorating anti-tumor immunity may be dependent upon microbially derived metabolites such as BCAA.
2025-04-14 | GSE291031 | GEO