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Deconstruction of cellular dynamics after treatment of volumetric muscle loss injury with extracellular matrix

ABSTRACT: Deconstruction of cellular dynamics after treatment of volumetric muscle loss injury with extracellular matrix

PROVIDER: PRJNA1107624 | ENA |

REPOSITORIES: ENA

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Deconstruction of cellular dynamics after treatment of volumetric muscle loss injury with extracellular matrix

Project description:Volumetric muscle loss (VML) is an acute loss of a critical volume of skeletal muscle that results in inflammation, fibrotic scarring in muscle tissue, and permanent muscle defects. The cellular and molecular processes that underlie fibrosis induced from VML injury need to be evaluated in larger animal models. Therefore, we used a canine model of VML alongisde treatment with an extracellular matrix (ECM) hydrogel. Treatment with the ECM hydrogel improved muscle regenerative responses and decreased proportions and spatial signatures of fibrotic and inflammatory cell populations.

2024-06-01 | GSE266585 | GEO

Unwavering Pathobiology of Volumetric Muscle Loss Injury

Project description:Volumetric muscle loss (VML) resulting from extremity trauma presents chronic and persistent functional deficits which ultimately manifest disability. Acellular biological scaffolds, or decellularized extracellular matrices (ECMs), embody an ideal treatment platform due to their current clinical use for soft tissue repair, off-the-shelf availability, and zero autogenous donor tissue burden. ECMs have been reported to promote functional skeletal muscle tissue remodeling in small and large animal models of VML injury, and this conclusion was reached in a recent clinical trial that enrolled 13 patients. However, numerous other pre-clinical reports have not observed ECM-mediated skeletal muscle regeneration. The current study was designed to reconcile these discrepancies. The capacity of ECMs to orchestrate functional muscle tissue remodeling was interrogated in a porcine VML injury model using unbiased assessments of muscle tissue regeneration and functional recovery. Here, we show that VML injury incites an overwhelming inflammatory and fibrotic response that leads to expansive fibrous tissue deposition and chronic functional deficits, which ECM repair does not augment.

2018-05-23 | GSE114798 | GEO

Single cell deconstruction of murine volumetric muscle loss reveals inflammatory imbalances preventing muscle stem cell mediated regeneration

Project description:Single cell deconstruction of murine volumetric muscle loss reveals inflammatory imbalances preventing muscle stem cell mediated regeneration

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Unwavering Pathobiology of Volumetric Muscle Loss Injury

Project description:Unwavering Pathobiology of Volumetric Muscle Loss Injury

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Perfusable adipose decellularized extracellular matrix biological scaffoldco-recellularizedwith adipose-derived stem cellsand L6 promotes functional skeletal muscle regeneration following volumetric muscle loss

Project description:Perfusable adipose decellularized extracellular matrix biological scaffoldco-recellularizedwith adipose-derived stem cellsand L6 promotes functional skeletal muscle regeneration following volumetric muscle loss

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TSG-6 mediated extracellular matrix modifications regulate hypoxic-ischemic brain injury

Project description:TSG-6 mediated extracellular matrix modifications regulate hypoxic-ischemic brain injury

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Basonuclin-2 regulates extracellular matrix production and degradation

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Neural extracellular matrix regulates visual sensory motor integration

Project description:Neural extracellular matrix regulates visual sensory motor integration

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Neural extracellular matrix regulates visual sensory motor integration

Project description:Visual processing depends on sensitive and balanced synaptic neurotransmission. Extracellular matrix proteins in the environment of cells are key modulators in synaptogenesis and synaptic plasticity. In the present study, we provide evidence that the combined loss of the four extracellular matrix components brevican, neurocan, tenascin-C and tenascin-R in quadruple knockout mice leads to severe retinal dysfunction and diminished visual motion processing in vivo. Remarkably, impaired visual motion processing was accompanied by a developmental loss of cholinergic direction-selective starburst amacrine cells. Additionally, we noted imbalance of inhibitory and excitatory synaptic signaling in the quadruple knockout retina. Collectively, the study offers novel insights into the functional importance of four key extracellular matrix proteins for retinal function, visual motion processing and synaptic signaling.

2023-12-18 | GSE230425 | GEO

Extracellular Matrix Formation Enhances the Ability of Streptococcus pneumoniae to Cause Invasive Disease

Project description:Background. During infection, pneumococci exist mainly in sessile biofilms rather than in planktonic form, except during sepsis. However, relatively little is known about how biofilms contribute to pneumococcal pathogenesis. Methods. We performed a biofilm assay and mouse infection experiments on opaque and transparent variants of a clinical serotype 19F strain. Results. After 4 days incubation, scanning electron microscopy revealed that opaque biofilm bacteria produced an extracellular matrix, whereas the transparent variant did not. The opaque biofilm-derived bacteria translocated from the nasopharynx to the lungs and brain of mice, and showed 100-fold greater in vitro adherence to A549 cells. Microarray analysis of planktonic and sessile bacteria from transparent and opaque variants showed differential gene expression in two operons: the lic operon, involved in choline uptake, and in the two-component system, ciaRH. Mutants of these genes did not form an extracellular matrix, could not translocate from the nasopharynx to the lungs or the brain, and adhered poorly to A549 cells. Conclusions. We conclude that only the opaque phenotype is able to form extracellular matrix, and that the lic operon and ciaRH contribute to this process. We propose that during infection, extracellular matrix formation enhances the ability of pneumococci to cause invasive disease. Data is also available from http://bugs.sgul.ac.uk/E-BUGS-117

2011-04-20 | E-BUGS-117 | biostudies-arrayexpress

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