Similar Datasets
Project description:Molecular insights into an ancient bone disorder
| PRJNA485979 | ENA
Project description:Paget disease of bone (PDB) is a chronic skeletal disorder with contemporary cases characterised by one or a few affected bones in individuals over 55 years of age. PDB-like changes have been noted in archaeological remains as old as Roman although accurate diagnoses and knowledge of the natural history of ancient forms of the disease are lacking. Previous macroscopic and radiographic analyses of six skeletons from a collection of 130 excavated at Norton Priory in Cheshire, UK, and dating to late Medieval times, noted unusually extensive pathological changes resembling PDB affecting up to 75% of individual skeletons. Here we report the prevalence of the disease in the collection is also remarkably high (at least 15.8% of the adult sample) with age-at-death estimations as low as 35 years. Despite these profound phenotypic differences paleoproteomic analyses identified SQSTM1/p62 (p62), a protein central to the pathological milieu of classical PDB, as one of the few non-collagenous human sequences preserved in skeletal samples, indicating that the disorder was likely an ancient precursor of contemporary PDB. Western blotting indicated abnormal migration of ancient p62 protein, with subsequent targeted proteomic analyses detecting more than 60% of the p62 primary sequence and directing sequencing analyses of ancient DNA that excluded contemporary PDB-associated SQSTM1 mutations. Together our observations indicate the ancient p62 protein is likely modified within its C-terminal ubiquitin-associated (UBA) domain. Ancient miRNAs were also remarkably well preserved in an osteosarcoma from a skeleton with extensive disease, with miR-16 expression changes consistent with that reported in contemporary PDB-associated bone tumours. Our work demonstrates the potential of proteomics to inform diagnoses of ancient disease and supports the proposal that Medieval Norton Priory was a ‘hotspot’ for an ancient form of PDB, with unusual features presumably potentiated by as yet unidentified environmental or genetic factors.
2019-04-09 | PXD011743 | Pride
Project description:Isotope analyses are some of the most common analytical methods applied to ancient bone, aiding the interpretation of past diets and chronology. For this, the evaluation of “collagen” yield is a routine step that allows for the selection of the specimens that are adequate for subsequent analyses, and samples with below ~1% yield normally discarded. Additionally, during the “collagen extraction” procedure, several sample fractions are generated and subsequently discarded but could contain proteins of analytical interest. In this study we evaluated the proteome variability of different fractions generated during the “collagen extraction” process of 29 samples, and their correlation with the collagen yield. We found that these fractions contained a significant amount of both collagenous and non-collagenous protein (NCP) spectra and that these were not correlated with the collagen yield. The variety of the extracted NCPs was comparable with that normally obtained from ancient samples, and the information obtained can be used to conduct species identification, phylogenetic studies, isotopic analyses and may be used to perform radiocarbon dating on the specimens. Overall, these findings suggest that not only is there value in retaining the fractions typically discarded as waste, but that low collagen yield specimens can still yield useful information.
2021-02-08 | PXD020516 | Pride
Project description: Not available
| S-EPMC6535003 | biostudies-literature
Project description:Profiling array: in order to investigate the microRNAs differentially expressed between osteosarcoma and their normal bone counterpart. Specimens were kept at 4 C in RNAlater for up to 1 week, then stored at 80 C. When formal pathologic interpretation of histology from other portions of the biopsy specimen rendered a diagnosis of osteosarcoma, the RNA-preserving tissue specimens were banked and annotated. In preparation for these specific experiments, total RNA was extracted from banked specimens with the TRIzol reagent and method (Invitrogen). Control samples were derived from to-be-discarded bone fragments obtained from similarly consented patients undergoing debridement surgeries for acute, traumatic injuries to the long bones.
2012-05-21 | E-MTAB-1136 | biostudies-arrayexpress
Project description:Patient-derived bone tumor (osteosarcoma and giant cell tumor of bone) cells, and the normal mesenchymal stem cells and osteoblasts were cultured and subjected to UV crosslinking (UV) at 254 nm or without crosslinking (noUV) as negative controls. Subsequently, RNA-binding proteins (RBPs) were identified by eRIC.
2024-02-28 | PXD038185 | Pride
Project description:Canine osteosarcoma tissues vs. normal bone
| PRJNA437637 | ENA
Project description:Due to the lack of a precise in vitro model that can mimic the nature microenvironment in osteosarcoma, the understanding of its resistance to chemical drugs remains limited. Here, we report a novel three-dimensional model of osteosarcoma constructed by seeding tumor cells (MG-63 and MNNG/HOS Cl #5) within in demineralized bone matrix scaffolds. Demineralized bone matrix scaffolds retain the original components of the natural bone matrix (hydroxyapatite and collagen type I), and possess good biocompatibility allowing osteosarcoma cells to proliferate and aggregate into clusters within the pores. Growing within the scaffold conferred elevated resistance to doxorubicin on MG-63 and MNNG/HOS Cl #5 cell lines as compared with two-dimensional cultures. Transcriptomic analysis showed an increased enrichment for drug resistance genes along with enhanced glutamine metabolism in osteosarcoma cells in demineralized bone matrix scaffolds. Inhibition of glutamine metabolism resulted a decrease in drug resistance of osteosarcoma, which could be restored by α-ketoglutarate supplementation. Overall, our study suggests that microenvironmental cues in demineralized bone matrix scaffolds can enhance osteosarcoma drug responses and that targeting glutamine metabolism may be a strategy for treating osteosarcoma drug resistance.
2023-12-20 | GSE234632 | GEO
Project description:We performed whole transcriptome analysis of osteosarcoma bone samples. Initially we sequenced total RNA from 36 fresh-frozen samples (18 tumoral bone samples and 18 non-tumoral paired samples) matching in pairs for each osteosarcoma patient. We also performed independent gene expression analysis of formalin-fixed paraffin-embedded (FFPE) samples to verify the RNAseq results. The use of FFPE samples allowed to analyse the effect of chemotherapy. Data were analysed with DESeq2 and Reactome packages of R. We found 6775 genes expressed differentially between the normal bone and osteosarcoma tissues with an FDR below 0.1, of which 4092 genes were up-regulated and 2683 were down-regulated. Among those genes, BTNL9, MMP14, ABCA10, ACACB, COL11A1 and PKM2 were expressed differentially with the highest significance between tumor and normal bone. Functional annotation with the Reactome identified significant changes in the pathways related to the extracellular matrix degradation and collagen biosynthesis. Analysis of independent FFPE samples largely verified our findings in fresh frozen samples, indicating that osteosarcoma is characterized by massive bone loss. We also found that chemotherapy induced the bone formation and reverses the bone loss caused by sarcoma. Taken together, our results indicate that changes in the degradation of extracellular matrix seem to be an important mechanism of osteosarcoma and efficient chemotherapy induces the genes related to bone formation.
2017-11-03 | GSE99671 | GEO