Human iPSC-Derived Spinal Neural Progenitors Enhance Sensorimotor Recovery in Spinal Cord-Injured NOD-SCID Mice via Differentiation and Microenvironment Regulation
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ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE303787 | GEO | 2025/08/05
REPOSITORIES: GEO
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Project description:Traumatic spinal cord injury (SCI) often leads to loss of locomotor function. Neuroplasticity of spinal circuitry underlies some functional recovery and therefore represents a therapeutic target to improve locomotor function following SCI. However, the cellular and molecular mechanisms mediating neuroplasticity below the lesion level are not fully understood. The present study performed a gene expression profiling in the rat lumbar spinal cord at 1 and 3 weeks after contusive SCI at T9 compared to control rat that received sham injury (laminectomy). The below-level gene expression profiles were compared with those of animals that were subjected to treadmill locomotor training. Rat lumbar spinal cords were taken for the microarray analysis at 1 and 3 weeks after contusive spinal cord injury at the T9 level. Another group of rats received treadmill locomotor training for 3 weeks, and theirs spinal cords were harvested for the microarray. The changes in gene expression after spinal cord injury were analyzed at the two time points. The influence of treadmill locomotor training was evaluated by comparing gene expression profiles between animals with or without treadmill training.
2013-11-27 | E-GEOD-52763 | biostudies-arrayexpress
Project description:Following contusive spinal injury astrocytes undergo inflammatory activation and proliferation in a process known as astrogliosis. Reactive astrocytes are attractive therapeutic targets as they sit central to many of the immune recruitment, injury response, and tissue healing processes of the spinal cord. However, methods of targeted expression of exogenous therapeutic genes within astrocytes must be validated to not alter the normal immunological involvement of astrocytes. To investigate the effect of transgene expression within astrocytes upon the immunological state of the contused cord, we injected the astrocyte-selective AAV5-GfaABC1D-dYFP reporter vector into an animal model of moderate contusive spinal cord injury. Bulk RNA microarrays were used to assess transcriptomic changes of the perilesional tissue.
2021-08-26 | GSE182796 | GEO
Project description:Human iPSC-derived thoracic spinal cord organoids were transplanted into spinal cord injury mice, and spinal cord tissue was collected after 7 weeks. The transplantation resulted in functional recovery and neural circuit remodeling in the injured mice.
2025-08-21 | GSE305911 | GEO
Project description:Traumatic spinal cord injury (SCI) often leads to loss of locomotor function. Neuroplasticity of spinal circuitry underlies some functional recovery and therefore represents a therapeutic target to improve locomotor function following SCI. However, the cellular and molecular mechanisms mediating neuroplasticity below the lesion level are not fully understood. The present study performed a gene expression profiling in the rat lumbar spinal cord at 1 and 3 weeks after contusive SCI at T9. The below-level gene expression profiles were compared with those of animals that were subjected to treadmill locomotor training.
2013-11-27 | GSE52763 | GEO
Project description:Spinal motor neurons deficiency results in a series of devastating disorders such as amyotrophic lateral sclerosis (ALS), spinal muscular atrophy (SMA) and spinal cord injury (SCI). These devastating disorders are currently incurable, while human pluripotent stem cells (hPSCs) derived spinal motor neurons are promising but suffered by low-efficiency, functional immaturity and lacks of posterior cell identity. In this study, we have established human spinal cord neural progenitor cells (hSCNPCs) via hPSCs differentiated neuromesodermal progenitors (NMPs) and demonstrated the hSCNPCs can be continuously expanded up to 40 passages. hSCNPCs can be rapidly differentiated into posterior spinal motor neurons with high efficiency. The functional maturity has been examined in detail. Moreover, a co-culture scheme which is compatible for both neural and muscular differentiation is developed to mimic the neuromuscular junction (NMJ) formation in vitro. Together, these studies highlight the potential avenues for generating clinically relevant motor neurons and modelling neuromuscular diseases through our defined hSCNPCs.
2023-06-01 | GSE205718 | GEO
Project description:OL translatome was determined in female RiboTag:Plp1-CreERT2 mice (C57Bl6 background) at 2, 10, and, 42 days after moderate contusive T9 SCI. Ribotag expression was induced by daily tamoxifen injections (1 mg i.p. over 8 days). Three weeks after completion of the induction protocol moderate contusive SCI was performed at T9 level (IH imactor, 50 kdyn). Uninjured mice (naive) were used as controls. At the time of surgery, animal age was 10-12 weeks. After euthanasia, RNA was isolated from a 5 mm spinal cord segment spanning the injury epicenter. OL tranlsatome was immunopurified using anti-HA antibody and protein A/G coupled magnetic beads following the Ribotag protocol. Total spinal cord RNA and OL translatome RNA samples were analyzed by RNASeq. Each biological sample was prepared by pooling material from two mice (3 biological samples representing 6 animals were used for each timepoint).
2023-12-06 | GSE225308 | GEO
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.
2007-10-08 | E-GEOD-2270 | biostudies-arrayexpress
Project description:Improved outcome of contusive spinal cord injury in Bmal1-/- mice is associated with protection of the blood spinal cord barrier
| PRJNA636885 | ENA
Project description:In the past decade, NOD.Cg- Prkdcscid Il2rgtm1Wjl/SzJ (NSG, NOD scid gamma) mice have become a model of choice in several areas of biomedical research; however, comprehensive data on their spontaneous age-related pathology are not currently available in the literature. The prevalence of spontaneous morbidity affecting aged NSG female breeders enrolled in a parasitology study was documented with classification of neoplastic and non-neoplastic (inflammatory, metabolic, degenerative) lesions. Malignant mammary neoplasms were most commonly diagnosed, often accompanied by pulmonary metastases, while a low frequency of lymphoma and histiocytic sarcoma was documented. The major inflammatory conditions were suppurative pleuropneumonia and bronchopneumonia with abscess formation, from which Pasteurella pneumotropica was commonly isolated, followed by otitis media. Both inflammatory and degenerative lesions of the genital tract were identified, along with neoplasms such as endometrial yolk sac carcinomas and granulosa cell tumors. Novel conditions identified included renal tubular degeneration and necrosis associated with 2 concurrent types of intranuclear inclusions, focal or multifocal hyperostosis of the skull, and neuroendocrine tumors of the mesometrium. The majority of degenerative lesions that affected the genital tract, endocrine, and skeletal systems did not represent the actual underlying cause of death but rather were considered incidental findings. This study indicates that both inflammatory and neoplastic conditions contribute to morbidity and mortality in experimentally manipulated aged female NSG mice.
| S-EPMC5548647 | biostudies-literature
Project description:Purpose: Spinal cord injury (SCI) is a devastating neurological disease without effective treatment. To generate a comprehensive view of the mechanisms involved in SCI pathology, we applied RNA-sequencing (RNA-seq) technology to characterize the temporal changes in global gene expression after contusive SCI in mice. Method Part1: A total of 27 female C57BI/6J mice (10-16 weeks of age; 20-25g; The Jackson Laboratory, Bar Harbor, ME) were used with 9 mice in each of following groups: shame control, 2 and 7 days after SCI. The surgical procedure for SCI were described previously [PMID:23289019]. Briefly, after anesthetization with a mixed solution of ketamine (80 mg/kg, ip) and xylazine (10 mg/kg, ip), mice received a dorsal laminectomy at the 9th thoracic vertebral (T9) level to expose the spinal cord and then a moderate T9 contusive injury using an Infinite Horizons impactor (PrecisionSystems and Instrumentation) at 60 kdyn with the spinestabilized using steel stabilizers inserted under the transverse processes one vertebra above and below the injury [PMID:19196178] . The shame control mice received only a dorsal laminectomy without contusive injury. Afterwards, the wound was sutured in layers, bacitracin ointment(Qualitest Pharmaceuticals,Huntsville, AL) was applied tothe wound area, 0.1mL of a 20 mg/ml stock of gentamicin(ButlerSchein, Dublin, OH) was injected subcutaneously, and the animals recovered on a water-circulating heating pad. Then mice received analgesic agent, buprenorphin(0.05 mg/kg, SQ; Reckitt Benckise, Hull, England)twice a day for two days. Bladders were manually expressed until automatic voiding returned spontaneously, which generally was within 7 days. At 2 or 7 days after SCI, the mice were anesthetized again with ketamine and xylazine and perfused briefly with normal physical saline. The injured spinal cords were then dissected and three 0.5 mm pieces of spinal cord were cut in the injured epicenter. All spinal cords were immediately frozen in liquid nitrogen and processed for RNA isolation. The spinal cords from three mice were combined into one biological replicate for RNA extraction. Three biological replicates were used. Method Part2: RNA-Seq was performed on the polyadenylated fraction of RNA isolated from tissue samples of acute (2D) and subacute phase (7D) and normal tissues (control, denoted as CTR hereafter). Three biological replicates were used for each phase.150-300 ng total RNAs were used for each sequencing library. RNA samples were polyA selected and paired-end sequencing libraries were constructed using TruSeq RNA Sample Prep Kit as described in the TruSeq RNA Sample Preparation V2 Guide (Illumina).The samples were then sequenced using the Illumina HiSeq sequencer. More than 30 million 100bp paired-end reads were generated from each biological replicate. Method Part3: Read mapping and Transcriptome construction were done by using optimized pipeline which integrate Tophat followed by Cufflinks. Result: We sequenced tissue samples from acute and subacute phases (2 days and 7 days after injury) and systematically characterized the transcriptomes with the goal of identifying pathways and genes critical in SCI pathology. The top enriched functional categories include ‘inflammation response’, ‘neurological disease’, ‘cell death and survival’ and ‘nervous system development’. The top enriched pathways include LXR/RXR Activation and Atherosclerosis Signaling etc. Furthermore, we developed a systems-based analysis framework in order to identify key determinants in the global gene networks of the acute and sub-acute phases. Some candidate genes that we identified have been shown to play important roles in SCI, which demonstrates the validity of our approach. There are also many genes whose functions in SCI have not been well studied and can be further investigated by future experiments. We have also incorporated pharmacogenomic information into our analyses. Among the genes identified, the ones with existing drug information can be readily tested in SCI animal models. Conclusion: in this study we have described an example of how global gene profiling can be translated to screening genes of interest and generating new hypotheses. Additionally, the RNA-seq enables splicing isoform identification and the estimation of expression levels, thus providing useful information for increasing the specificity of drug design and reducing potential side effect. In summary, these results provide a valuable reference data resource for a better understanding of the SCI process in the acute and sub-acute phases. mRNA profiles of Acute/subacute phase Spinal Cord Injury sample from mice were generated by RNA-sequencing using Illumina HiSeq.
2013-08-22 | E-GEOD-45376 | biostudies-arrayexpress