Related Experiment Video
Updated: Aug 7, 2026
A Radio-telemetric System to Monitor Cardiovascular Function in Rats with Spinal Cord Transection and Embryonic Neural Stem Cell Grafts
Published on: October 7, 2014
Identification of up-regulated genes after complete spinal cord transection in adult rats
1Department of Neurobiology, Institute of Basic Medical Sciences, Beijing, PR China.
Abstract:
Spinal cord injury (SCI) initiates a cascade of events and these responses to injury are likely to be mediated and reflected by changes in mRNA concentrations. As a step towards understanding the complex mechanisms underlying repair and regeneration after SCI, the gene expression pattern was examined 4.5 days after complete transection at T8-9 level of rat spinal cord. Improved subtractive hybridization was used to establish a subtracted cDNA library using cDNAs from normal rat spinal cord as driver and cDNAs from injured spinal cord as tester. By expressed sequence tag (EST) sequencing, we obtained 73 EST fragments from this library, representing 40 differentially expressed genes. Among them, 32 were known genes and 8 were novel genes. Functions of all annotated genes were scattered in almost every important field of cell life such as DNA repair, detoxification, mRNA quality control, cell cycle control, and signaling, which reflected the complexity of SCI and regeneration. Then we verified subtraction results with semiquantitative RT-PCR for eight genes. These analyses confirmed, to a large extent, that the subtraction results accurately reflected the molecular changes occurring at 4.5 days post-SCI. The current study identified a number of genes that may shed new light on SCI-related inflammation, neuroprotection, neurite-outgrowth, synaptogenesis, and astrogliosis. In conclusion, the identification of molecular changes using improved subtractive hybridization may lead to a better understanding of molecular mechanisms responsible for repair and regeneration after SCI.
Insights
Researchers identified gene expression changes 4.5 days after spinal cord injury (SCI) in rats. This study reveals key molecular mechanisms potentially involved in SCI repair and regeneration, offering new insights into neuroprotection and neurogenesis.
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- Spinal cord injury (SCI) triggers complex cellular responses.
- Understanding gene expression changes is crucial for SCI repair and regeneration research.
Purpose of the Study:
- To investigate gene expression patterns 4.5 days post-SCI.
- To identify molecular mechanisms underlying SCI repair and regeneration.
Main Methods:
- Improved subtractive hybridization to create a subtracted cDNA library.
- Expressed Sequence Tag (EST) sequencing to identify differentially expressed genes.
- Semi-quantitative RT-PCR to validate subtraction results.
Main Results:
- Identified 40 differentially expressed genes, including 32 known and 8 novel genes.
- Annotated genes involved in DNA repair, detoxification, cell cycle control, and signaling.
- Confirmed subtraction results accurately reflected molecular changes post-SCI.
Conclusions:
- The study identified genes relevant to SCI-related inflammation, neuroprotection, neurite outgrowth, synaptogenesis, and astrogliosis.
- Improved subtractive hybridization is effective for identifying molecular changes after SCI.
- Findings contribute to a better understanding of SCI repair and regeneration mechanisms.
