Project description:Data set contains LC-MS/MS data acquired on human skin with swabs to determine the impact of the developed beauty product on human skin of different types with emphasis on chemical and microbial changes
Project description:Data from skin swabs. Swabs collected from volunteers armpits, chests, upper and lower back. Study aims to reveal an impact of clothing onto the human body and microbiome
2017-07-24 | MSV000081379 | GNPS
Project description:The Immune Microbiome Product Against COVID infecTion (IMPACT) study
Project description:Swedish snus is a smokeless tobacco product that contains reduced levels of harmful compounds compared with cigarette smoke. In Sweden, where snus use exceeds smoking among men, relatively low rates of major smoking-related diseases have been recorded. To better understand how snus use could align with current tobacco harm reduction strategies, its potential mechanisms of toxicity must be investigated. This study aimed to determine, via a systems toxicology approach, the biological impact of repeated 72-hour exposure of human gingival epithelial organotypic cultures to extracts from both a commercial and a reference snus and the total particulate matter (TPM) from cigarette smoke. At concentrations relevant for human use, cultures treated with snus extracts induced mild, generally reversible biological changes, while TPM treatment induced substantial morphological and inflammatory alterations. Network enrichment analysis and integrative analysis of the global mRNA and miRNA expression profiles indicated a limited and mostly transient impact of the snus extracts, in particular on xenobiotic metabolism, while the effects of TPM were marked and sustained over time. High-confidence miRNAs that might be related to pathological conditions in vivo were identified. This study highlights the limited biological impact of Swedish snus extract on human organotypic gingival cultures.
Project description:Swedish snus is a smokeless tobacco product that contains reduced levels of harmful compounds compared with cigarette smoke. In Sweden, where snus use exceeds smoking among men, relatively low rates of major smoking-related diseases have been recorded. To better understand how snus use could align with current tobacco harm reduction strategies, its potential mechanisms of toxicity must be investigated. This study aimed to determine, via a systems toxicology approach, the biological impact of repeated 72-hour exposure of human gingival epithelial organotypic cultures to extracts from both a commercial and a reference snus and the total particulate matter (TPM) from cigarette smoke. At concentrations relevant for human use, cultures treated with snus extracts induced mild, generally reversible biological changes, while TPM treatment induced substantial morphological and inflammatory alterations. Network enrichment analysis and integrative analysis of the global mRNA and miRNA expression profiles indicated a limited and mostly transient impact of the snus extracts, in particular on xenobiotic metabolism, while the effects of TPM were marked and sustained over time. High-confidence miRNAs that might be related to pathological conditions in vivo were identified. This study highlights the limited biological impact of Swedish snus extract on human organotypic gingival cultures.
Project description:Endogenous glucocorticoids (GCs) are pivotal in controlling inflammation. Keratinocyte-derived GCs contribute to local skin homeostasis as deletion of the GC-producing enzyme 11β-hydroxylase (Cyp11b1) in keratinocytes exacerbated skin inflammation. Since local tamoxifen-induced knockout (KO) induction may contribute to skin irritation, we implemented intraperitoneal injections to induce a systemic skin GC depletion preventing experimental skin irritation in order to reveal the importance of skin GC in steady-state. Both, local and systemic skin GC deficiency models exhibited reduced skin GC levels and increased migration of skin antigen-presenting cells to draining lymph nodes. However, systemic skin GC ablation did not result in pronounced skin inflammation as seen in local model. Interestingly, systemic skin GC deficiency elevated systemic inflammatory markers and provoked adrenal GC synthesis. RNA sequencing of keratinocytes revealed distinct gene expression patterns between local and systemic KOs. Local skin GC ablation showed a stronger inflammatory and apoptotic response, while systemic skin GC deficiency triggered several compensatory regulatory pathways, mitigating extensive skin inflammation. These findings underscore the critical role of local GCs in skin immune resilience against minor skin irritations and highlight the interplay between skin and adrenal GC levels.
Project description:<p>Parkinson's Disease (PD) has been associated with a distinct odour, which emanates from the skin and is strongest in sebum-rich areas. In this study, sebum was sampled from participants using cotton gauze and the volatile components emanating from these swabs were analysed directly with thermal desorption gas chromatography-mass spectrometry (TD GC-MS). We analysed subjects with clinically established PD (n=46) along with healthy controls (n=28) sampled from two sites. The volatilome profiles obtained for PD and control cohorts were compared with the profile of participants (n=9) with idiopathic REM sleep behaviour disorder (iRBD) to investigate metabolite changes in probable prodromal PD. We also compared PD participants sampled at yearly intervals for a total of three years. Volatile compounds from TD GC-MS analysis were found in different quantities between PD, control and iRBD subjects. We found 55 significant features where abundance in samples from individuals with iRBD was intermediate between that found for PD and control samples. Significant features were found to be alkanes and fatty acid methyl esters (FAMEs), with other metabolites identified as an aldehyde, purine and tropinone. In olfactory analysis of the iRBD samples three out of nine were classified PD, and on clinical follow up two of these showed PD symptoms. Further, when analysing the volatilome from longitudinal PD sampling, almost two-thirds of the significant features showed differential regulation over the three visits. Our findings support the use of sebum as an accessible biofluid rich with measurable volatile compounds which alter in abundance in individuals with PD and iRBD, as the disease progresses.</p>