MiRNA expression in aging skin
Ontology highlight
ABSTRACT:
ORGANISM(S): synthetic construct Homo sapiens
PROVIDER: GSE55299 | GEO | 2014/02/25
SECONDARY ACCESSION(S): PRJNA239239
REPOSITORIES: GEO
Similar Datasets
Project description:Fibroblasts were isolated from healthy skin, donors were young, middlege and old. We used Affymetrix miRNA microarrays to detail the global expression of miRNAs. Primary fibroblasts were isolated from healthy skin, donnors were young, middlege and old and kept in culture for a short time in order to avoid scenescence.
2014-02-25 | E-GEOD-55299 | biostudies-arrayexpress
Project description:Fibroblasts are the main dermal cell type and are essential for the architecture and function of human skin. Important differences have been described between fibroblasts localized in distinct dermal layers, and these cells are also known to perform varied functions. However, this phenomenon has not been analyzed comprehensively yet. Here we have used single-cell RNA sequencing to analyze >15,000 cells from a sun-protected area in young and old donors. Our results define four main fibroblast subpopulations that can be spatially localized and functionally distinguished. Importantly, intrinsic aging reduces this fibroblast ‘priming’, generates distinct expression patterns of skin aging-associated genes, and substantially reduces the interactions of dermal fibroblasts with other skin cell types. Our work thus provides comprehensive evidence for a functional specialization of human dermal fibroblasts and suggests that the age-related loss of fibroblast priming contributes to human skin aging.
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Project description:We have employed whole genome microarray expression profiling to identify genes with the potential to distinguish young and aged interfollicular epidermis. Gene expression of paw whole skin samples from 4 young (6 week-old) and 4 aged (102 week-old) C57BL6 mice was analyzed.
2017-07-11 | E-MTAB-4916 | biostudies-arrayexpress
Project description:Human fibroblast of different age were investigated for their gene expression profiles in quiescence. Cultures were established from skin samples derived from young and old donors, obtained from the NIA Aging Cell Repository (Coriell Institute for Medical Research, Camden, NJ). All cell lines originated from 2 mm punch biopsies taken from the medial aspect of the upper arm. The donors were members of the Baltimore Longitudinal Study of Aging (BLSA) where they were characterized as "healthy" indviduals. The cell lines investigated had normal karyotypes.
2010-02-26 | GSE15829 | GEO
Project description:To identify the candidate miRNAs that might compromise wound healing and contribute to the age-associated delay in wound repair, global miRNA profiling was performed in mouse back telogen skin of young (8-week-old) and aged (2-year-old) animals.
2017-03-25 | GSE97034 | GEO
Project description:The changes in the proteome of different human tissues with advancing age are poorly characterized. Here, we studied the proteins present in skin fibroblasts collected from 82 healthy individuals across a wide age spectrum (22 to 89 years old) who participated in the GESTALT (Genetic and Epigenetic Signatures of Translational Aging Laboratory Testing) study of the National Institute on Aging, NIH. Proteins were extracted from lysed fibroblasts and subjected to liquid chromatography-mass spectrometry analysis, and the expression levels of 9341 proteins were analyzed by linear regression models. Several differentially expressed proteins were implicated in processes that change with age, including autophagy, scavenging of reactive oxygen species (ROS), ribosome biogenesis, DNA replication, and DNA repair. Changes on these prominent pathways were further assessed using molecular and cell-culture approaches. Our study establishes a framework of the global proteome governing the homeostasis of the aged skin.
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Project description:Gene expression approach to differences in stress response between human skin fibroblasts derived from chronologically young (~20 years) and old (~90 years) subjects. Expression of CDKN2A was most different between fibroblasts from young and old subjects and
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Project description:During aging, stromal functions are thought to be impaired, yet little is known whether this stems from molecular and cellular changes of fibroblasts, a major component of stroma. Using population- and single-cell whole transcriptomics, and long-term lineage tracing, we studied alterations in murine dermal fibroblasts during physiological aging under different dietary regimes known to affect longevity. We show that the identity of aged fibroblasts becomes undefined, with the distinct fibroblast states present in young skin no longer clearly demarcated. In addition, old fibroblasts not only reduce the expression of genes involved in the formation of the extracellular matrix, but intriguingly, also gain adipogenic traits, paradoxically becoming similar to neonatal pro-adipogenic fibroblasts. These age-related alterations are sensitive to systemic changes in metabolism: long-term caloric restriction prevents them in old fibroblasts in a reversible manner, whereas a high-fat diet potentiates them in young fibroblasts. Finally, inhibition of the master regulator of adipogenesis, PPARgamma, attenuates fibroblast aging in vivo, providing potential anti-aging therapeutic alternatives to caloric restriction.
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