Ontology highlight
ABSTRACT:
PROVIDER: PRJNA998601 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:Tendon is a highly organized, dense connective tissue that has been demonstrated to have very little turnover. In spite of the low turnover, tendon can grow in response to loading, which may take place primarily at the periphery. Tendon injuries and recurrence of injuries are common in both human and animal in sports. It is unclear why some areas of the tendon are more susceptible to such injury and whether this is due to intrinsic regional differences in extracellular matrix (ECM) production or tissue turnover. This study aimed to compare populations of tenocytes derived from the tendon core and periphery. Tenocytes were isolated from equine superficial digital flexor tendons (SDFT), and the proliferation capacity was determined. ECM production was characterized by immuno- and histological staining and by liquid chromatography-mass spectrometry-based proteomics. Core and periphery SDFT cultures exhibited comparable proliferation rates and had very similar proteome profiles, but showed biological variation in collagen type I deposition. In conclusion, the intrinsic properties of tenocytes from different regions of the tendon are very similar and other factors in the tissue may contribute to how specific areas respond to loading or injury.
2020-08-24 | PXD019974 | Pride
Project description:Tendon is a highly aligned connective tissue, in which the macro-structure consists of collagen-rich fascicles surrounded by interfascicular matrix (IFM). In a series of recent studies in equine tissue, we have demonstrated specialisation of tendon composition, structure and mechanics to achieve the tendon’s functional requirements, specifically reporting extensive specialisation of the IFM region in the energy storing superficial digital flexor tendon. We have also demonstrated loss of functional specialisms with ageing, leading to a hypothesised new paradigm for tendinopathy, focused on the importance of the IFM. However, to date, there have been no studies focused on structure-function specialisation or the IFM in functionally distinct human tendons. Here, we compare the positional anterior tibialis tendon and energy storing Achilles tendon, performing a detailed analysis of the composition and mechanical properties of both fascicle and IFM regions, to test the hypothesis that the IFM in the energy storing Achilles tendon has specialised composition and mechanical properties, and that these specialisations are lost with ageing. We demonstrate that the IFM is specialised in the energy storing Achilles tendon, with greater elasticity and fatigue resistance than in the positional anterior tibialis tendon. While there were few age-related alterations in mechanics, we did identify age-related alterations in the IFM proteome of the Achilles tendon specifically, which is predicted to be regulated by TGF-beta signalling and may be responsible for the trend towards decreased fatigue resistance observed in the Achilles IFM with ageing.
2020-11-11 | PXD018212 | Pride
Project description:An Infinium microarray platform (GPL28271, HorvathMammalMethylChip40) was used to generate DNA methylation data from many tissues from horses We generated DNA methylation data from n=333 horse tissue samples representing tissues. Blood samples were collected via venipuncture into EDTA tubes from across 24 different horse breeds (buffy coat). The other tissues were collected at necropsy. The tissue atlas was generated from two Thoroughbred mares as part of the FAANG initiative 37, with the following tissues profiled: adipose (gluteal), adrenal cortex, blood (PBMCs; only n=1 mare), cartilage (only n=1 mare), cecum, cerebellum (2 samples each from lateral hemisphere and vermis), frontal cortex, duodenum, fibroblast, heart (2 samples each from the right atrium, left atrium, right ventricle, left ventricle), hypothalamus, ileum, jejunum, keratinocyte, kidney (kidney cortex and medulla), lamina, larynx (i.e. cricoarytenoideus dorsalis muscle), liver, lung, mammary gland, mitral valve of the heart, skeletal muscle (gluteal muscle and longissimus muscle), occipital cortex, ovary, parietal cortex, pituitary, sacrocaudalis dorsalis muscle, skin, spinal cord (C1 and T8), spleen, suspensory ligament, temporal cortex, tendon (deep digital flexor tendon and superficial digital flexor tendon), uterus.
2021-11-25 | GSE174767 | GEO
Project description:This dataset is comprised of RNA samples from 11 horses of various ages and sex that comprise the following tissues: Adipose Tissue, Adrenal Cortex, Adrenal Medulla, Aorta, Articular Cartilage (foal), Bladder, Bone, Bone Marrow, Cecum, Cerebrum, Cornea, Embryo (whole embryo, 34d), Endometrium (preg. day 16), Endometrium (preg. day 50), Epididymus, Hoof (germinal epithelium), Kidney, Large Intestine, Liver, Lung Lymph Node, Lymphocytes (activated), Muscle (cardiac), Muscle (skeletal, tongue), Muscle (skeletal), Muscle (smooth), Ovary, Pancreas, Pituitary (anterior), Pituitary (posterior), Placental Villous, Retina, Salivary Gland, Skin (full thickness), Spinal Cord, Spinal Root Ganglia, Spleen (red pulp), Spleen (white pulp), Stomach, Synovial Membrane, Tendon (superficial digital flexor, foal), Testes, Thymus, and Vena Cava. This study was carried out in strict accordance with the recommendations in the Guide for the Care and Use of Laboratory Animals of the National Institutes of Health. Tissue samples for total RNA isolation were collected under a protocol (00814A2004) reviewed and approved by the Office of Research Integrity, Institutional Animal Care and Use Committee, at the University of Kentucky (PHS Assurance Number: A3336-01). Two micrograms of mRNA from each tissue sample was used to generate the final RNA pool. The pooled sample was Illumina and 454 sequenced with the aim to improve equine gene structural annotation.
2015-05-15 | E-MTAB-2879 | biostudies-arrayexpress
Project description:Myotendinous junction samples from horse superficial digital muscle (SDF) were compared to the neighbouring muscle and tendon tissue to identify genes with increased expression in myotendinous junction.
2021-07-12 | GSE166468 | GEO
Project description:the aim of this study was to isolate, characterise and compare the proteome of the IFM and fascicular matrix (FM) in the equine superficial digital flexor tendon (SDFT). We hypothesised that the proteomic profile would differ between the FM and the IFM, with greater complexity and faster turnover in the IFM. Regions of the SDFT were isolated using laser capture microdissection and the protein profile assessed using mass spectrometry. 246 proteins were identified in the IFM, and 141 were identified in the FM. 60 proteins showed a 2-fold difference in abundance between the IFM and FM, including greater abundance of collagen-III and cellular proteins in the IFM, and higher levels of collagens-I and XII, and fibromodulin in the FM. A greater number of neopeptides were identified in the IFM, indicating more rapid turnover than in the FM. There were few alterations in protein abundance with ageing, but the number of neopeptides decreased with age in the IFM specifically, suggesting a decrease in IFM turnover in aged individuals. These results support the hypothesis, showing distinct protein profiles and indicating more rapid turnover in the IFM than in the FM, which appears to decline with ageing in the IFM specifically. This may result in alterations in IFM mechanical properties in aged tendon, contributing to age-related tendon injury.
2016-02-08 | PXD002979 | Pride
Project description:Little is understood about the roles of tendon cells during flexor tendon healing. To better understand tendon cell functions, the Scx-Cre mouse was crossed to the DTR mouse model to facilitate scleraxis lineage cell depletion prior to acute flexor tendon injury and repair. WT (cre-) and experimental (cre+) mice underwent complete transection and repair of the flexor digitorum longus tendon. Repaired tendons were harvested at 14 and 28 days post-repair for bulk RNA-Seq analysis to examine possible mechanisms driving differential healing due to Scx lineage cell depletion.
2021-02-08 | GSE156157 | GEO
Project description:RNA-seq of mouse deep digital flexor tendon after ovariectomy
| PRJDB11879 | ENA