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Bariatric surgery reduces obesity associated breast cancer and enhances response to immunotherapy

ABSTRACT: This SuperSeries is composed of the SubSeries listed below. -GEO GSE174760 (bulk mammary fat pad RNA), GSE174761 (bulk tumor RNA),

ORGANISM(S): Mus musculus

PROVIDER: GSE174762 | GEO | 2021/05/21

REPOSITORIES: GEO

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Bariatric surgery reduces obesity associated breast cancer and enhances response to immunotherapy [Mammary Fat Pad RNA-seq]

Project description:Bariatric surgery reduces obesity associated breast cancer and enhances response to immunotherapy [Mammary Fat Pad RNA-seq]

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Bariatric surgery reduces obesity associated breast cancer and enhances response to immunotherapy [Tumor - breast cancer RNA-seq]

Project description:Patients undergoing bariatric surgery are protected from subsequent breast cancer risk. It is unknown whether weight loss alone or surgery-specific alterations mediate risk reduction. We examined breast cancer in a pre-clinical model of diet induced obesity (DIO) followed by vertical sleeve gastrectomy (VSG) or dietary weight loss. DIO exacerbated tumor progression compared to lean controls, while VSG-induced weight loss reversed this exacerbation. However, dietary interventions were more effective than VSG despite similar reductions in weight and adiposity, potentially due to elevated immunosuppression after VSG. In tumor bearing mice, anti-PD-L1 immunotherapy after VSG improved anti-tumor immunity and potently impaired tumor progression. Thus, weight loss before tumor onset was protective regardless of intervention. Importantly, immunotherapy specifically improved outcomes in VSG.

2021-05-21 | GSE174761 | GEO

Bariatric surgery reduces obesity associated breast cancer and enhances response to immunotherapy [Mammary Fat Pad RNA-seq]

2021-05-21 | GSE174760 | GEO

Bariatric surgery reduces obesity associated breast cancer and enhances response to immunotherapy

Project description:Bariatric surgery reduces obesity associated breast cancer and enhances response to immunotherapy

| PRJNA731481 | ENA

Bariatric surgery reduces obesity associated breast cancer and enhances response to immunotherapy [Tumor - breast cancer RNA-seq]

Project description:Bariatric surgery reduces obesity associated breast cancer and enhances response to immunotherapy [Tumor - breast cancer RNA-seq]

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Obesity in children: bariatric surgery.

Project description:The prevalence of childhood obesity in the UK and in many countries worldwide remains high. Behavioural interventions to modify lifestyle, such as diet and physical activity, usually form part of weight management strategies for obese children. Whether or not surgical interventions are effective and safe in treating childhood obesity is unclear.We conducted a systematic overview, aiming to answer the following clinical question: What are the effects of surgical interventions for the treatment of childhood obesity? We searched Medline, Embase, The Cochrane Library, and other important databases up to August 2014 (Clinical Evidence reviews are updated periodically; please check our website for the most up-to-date version of this overview).At this update, after deduplication and removal of conference abstracts, 67 records were screened for inclusion in the overview. Appraisal of titles and abstracts led to the exclusion of 19 studies and the further review of 48 full publications. Of the 48 full articles evaluated, two systematic reviews were included at this update.In this systematic overview, we categorised the efficacy for two comparisons based on information about the effectiveness and safety of bariatric surgery versus no intervention and different types of bariatric surgery versus each other.

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Project description:Effect of bariatric surgery on microbiome composition and microbial metabolomics.

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Obesity and Bariatric Surgery Drive Epigenetic Variation of Spermatozoa in Humans

Project description:Obesity is a heritable disorder, with children of obese fathers at higher risk of developing obesity. Environmental factors epigenetically influence somatic tissues, but the contribution of these factors to the establishment of epigenetic patterns in human gametes is unknown. Here, we hypothesized that weight loss remodels the epigenetic signature of spermatozoa in human obesity. Comprehensive profiling of the epigenome of sperm from lean and obese men showed similar histone positioning, but small non-coding RNA expression and DNA methylation patterns were markedly different. In a separate cohort of morbidly obese men, surgery-induced weight loss was associated with a dramatic remodeling of sperm DNA methylation, notably at genetic locations implicated in the central control of appetite. Our data provide evidence that the epigenome of human spermatozoa dynamically changes under environmental pressure, and offers insight into how obesity may propagate metabolic dysfunction to the next generation.

2015-12-04 | GSE74426 | GEO

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