Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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Transcription profiling of rat single cell derived calvaria cell colonies with adipocyte and bone markers

ABSTRACT: Single cell-derived colonies were obtained by sorting 21 days fetal Rat calvaria cells into microtitre wells using flow cytometry. Colonies were categorized according to a limited gene expression profiling for a specific bone (osteocalcin) and a specific adipocyte (adipsin) marker by real-time PCR. Colonies expressing neither, one or both bone and adipocyte markers are in the sample set. Microarray analysis will address the global gene expression profiles of CFU-O (bone marker only), CFU-F (neither bone nor adipocyte marker) and CFU-bipotential (both markers) derived from single cells. CFU-A (adipocyte marker only) samples are also available for analysis if warranted. Experiment Overall Design: this experiment include 3 samples and 18 replicates

ORGANISM(S): Rattus norvegicus

SUBMITTER: OGIC Info Ontario Genomics Innovation Centre (OGIC)

PROVIDER: E-GEOD-3775 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Project description:Paleoproteomics and the study of ancient proteins has become an important consideration in bioarchaeological research as we seek to understand the relationship between the physical skeleton and its underlying biochemistry. Osteocalcin (OC) is an abundant, non-collagenous protein that is accessible archaeologically due to its affinity for hydroxyapatite in bone. Manufactured by the osteoblast cells during normal bone metabolism, osteocalcin is inherently linked to the process of bone remodelling. Clinical studies have consistently shown the impact of biological (i.e., sex and age) and pathological (i.e., disease) factors on osteocalcin concentrations within the body; however, this connection has yet to be fully explored bioarchaeologically. For this study, 46 individuals from the Danish Sct. Albert’s cemetery (AD 1250-1536) were analyzed with cortical bone samples harvested from the femur. Each sample was demineralized and quantified using established paleoproteomic methods (ELISA) and tested for diagenesis using FTIR-ATR. 4 samples were validated by LC-MS. No significant differences were found in the osteocalcin concentrations between adult males and females. However, males had a wider range of osteocalcin variability perhaps explained in part by their increased prevalence of pathological conditions characterized by bone remodelling. Similarly, non-adults had a wide range of osteocalcin variability but there were no significant differences when compared to the adult mean. No correlations were found between osteocalcin concentrations and diagenesis suggesting that the protein can survive across a range of temporal periods and variable burial environments. While no clear pattern emerged between osteocalcin concentrations and biological and/or pathological factors, this study is significant in that it further explores the use of paleoproteomics in bioarchaeological contexts and how we may unite our macroscopic and biochemical assessments of human skeletal remains.

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Transcription profiling of rat single cell derived calvaria cell colonies with adipocyte and bone markers

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