Project description:We compared the therapeutic effects and mechanism of transplanted rat cranial bone-derived mesenchmay stem cell (rcMSCs) and rat bone marrow-derived mesenchymal stem cell (rbMSCs) in a rat cervical spinal cord injury (cSCI) model. We performed gene expression profiling analysis using data obtained from RNA-seq of rcMSCs and rbMSCs
Project description:Summary: Spinal cord injury (SCI) is a damage to the spinal cord induced by trauma or disease resulting in a loss of mobility or feeling. SCI is characterized by a primary mechanical injury followed by a secondary injury in which several molecular events are altered in the spinal cord often resulting in loss of neuronal function. Analysis of the areas directly (spinal cord) and indirectly (raphe and sensorimotor cortex) affected by injury will help understanding mechanisms of SCI. Hypothesis: Areas of the brain primarily affected by spinal cord injury are the Raphe and the Sensorimotor cortex thus gene expression profiling these two areas might contribute understanding the mechanisms of spinal cord injury. Specific Aim: The project aims at finding significantly altered genes in the Raphe and Sensorimotor cortex following an induced moderate spinal cord injury in T9.
Project description:Human bone marrow-derived marrow stromal cell (BM-MSC) and neurosphere (BM-neurosphere) transplantation shows limited efficacy as a therapeutic adjunct to surgical decompression in an implantable polymer-induced degenerative cervical myelopathy (DCM) model Degenerative cervical myelopathy (DCM) is a prevalent spinal cord disorder in the developed world. The study investigates the therapeutic potential of human bone marrow-derived mesenchymal stem cells (BM-MSC) and BM-neurospheres as adjunct therapies to surgical decompression in a polymer-induced DCM rat model. The study assessed locomotor function, blood-spinal cord barrier (BSCB) integrity, and cell engraftment. Results showed delayed locomotor recovery upon cervical decompression and limited efficacy of BM-MSCs and BM-neurospheres in improving outcomes under the experimental conditions.
Project description:<p>Bone regeneration requires spatiotemporal coordination of immune modulation, stem cell recruitment, angiogenesis, and osteogenesis, yet most scaffolds lack sequential control across healing phases. We develop a near-infrared (NIR)-responsive therapeutic platform that integrates clinically available irradiation with an engineered 3D radially aligned nanofiber scaffold functionalized with black phosphorus (BP) and a bone marrow mesenchymal stem cell (BMSC)-targeting aptamer (Apt19S). NIR photothermal stimulation accelerates BP degradation, releasing phosphate ions and activating a heat-shock program to promote macrophage polarization, endogenous MSC homing, neovascularization, and osteogenic differentiation. Metabolomics reveals cooperative regulation of HSP-linked signaling and lipid metabolism. In a rat critical-size calvarial defect, the platform achieves robust bone regeneration without exogenous cells or growth factors. The system is simple, structurally tunable, and shape-customizable, providing a clinically translatable and modular framework for spatiotemporal microenvironment programming in bone and other regenerative settings.</p>
Project description:Mesenchymal stem cells (MSCs) and their cellular response to various stimuli have been characterized in great detail in culture conditions. In contrast, the cellular response of MSCs in an in vivo setting is still uncharted territory. In this study, we investigated the cellular response of MSCs following transplantation into spinal cord injury (SCI).Mouse bone marrow-derived MSCs were transplanted 24h following severe contusion SCI in mice. As controls, MSCs transplanted to uninjured spinal cord and non-transplanted MSCs were used. At seven days post transplantation, the MSCs were isolated from the SCI, and their global transcriptional changes investigated using RNA-sequencing. We found that MSCs transplanted into SCI down-regulate their response to cytokines, tendency to adhere and to undergo phagocytosis but up-regulate their ability to repair DNA and proliferate.
