04 November 2019 : Animal Research
Med Sci Monit 2019; 25:8281-8288
BACKGROUND: Spinal cord injury (SCI) is a severe devastating condition associated with serious disability and neurologic deficits. Aberrant micro RNA (miRNA) expression has been related to a variety of central nervous system diseases including SCI. In the present study, we aimed to discover the role of miR-129-5p on SCI.
MATERIAL AND METHODS: An acute SCI rat model was induced, following the modified Allen method. A total of 36 rats were randomly assigned into 4 groups (n=9 in every group): Sham group; Model group (SCI+saline); SCI+NC group; and SCI+miR-129-5p group (100 nm solution, every 2 days). Basso-Beattie-Bresnahan (BBB) locomotor rating score was carried out to determine functional recovery. TUNEL (terminal dUTP nick-end labeling) staining was used to evaluate cell apoptosis. Hematoxylin and eosin staining was performed to assess the pathological state of spinal cord. Furthermore, western blot assay was conducted to measure the calpain1 and calpain2 expression.
RESULTS: Our data suggested that the expression level of miR-129-5p was markedly reduced in rats after SCI. Then miR-129-5p mimic was injected into the vertebral canal. We found that the SCI+miR-129-5p group had a high score in the BBB test compared with the SCI+NC group and the Model group. The overexpression of miR-129-5p obviously reduced tissue loss, damaged cells, and the number of TUNEL positive cells. Moreover, western blot assay exhibited that overexpression of miR-129-5p decreased calpain1, calpain2, and cleaved caspase-3 expression.
CONCLUSIONS: Our findings suggested that overexpression of miR-129-5p improved neurological function by promoting functional recovery, reducing tissue loss and cell apoptosis in rats in an SCI model, possibly through downregulation of calpain1 and calpain2.
Keywords: Calpain, Spinal Cord Injuries, Gene Expression, Neurons, Recovery of Function, Spinal Cord
01 September 2023 : EditorialEditorial: A Rapid Global Increase in COVID-19 is Due to the Emergence of the EG.5 (Eris) Subvariant of Omicron SARS-CoV-2
Med Sci Monit 2023; 29:e942244
22 Sep 2023 : Clinical ResearchComparative Analysis of Symptomatology in Hospitalized Children with RSV, COVID-19, and Influenza Infections
Med Sci Monit In Press; DOI: 10.12659/MSM.941229
21 Sep 2023 : Clinical ResearchThe Impact of Implementing the Vortex Approach on Airway Management Performance in Stressed Medical Student...
Med Sci Monit In Press; DOI: 10.12659/MSM.940372
20 Sep 2023 : Clinical ResearchChanges in Upper Airway Anatomy Following Orthodontic Treatment for Malocclusion: A Comparative Retrospecti...
Med Sci Monit In Press; DOI: 10.12659/MSM.941749
Most Viewed Current Articles
13 Nov 2021 : Clinical ResearchAcceptance of COVID-19 Vaccination and Its Associated Factors Among Cancer Patients Attending the Oncology ...
Med Sci Monit 2021; 27:e932788
30 Dec 2021 : Clinical ResearchRetrospective Study of Outcomes and Hospitalization Rates of Patients in Italy with a Confirmed Diagnosis o...
Med Sci Monit 2021; 27:e935379
08 Mar 2022 : Review articleA Review of the Potential Roles of Antioxidant and Anti-Inflammatory Pharmacological Approaches for the Man...
Med Sci Monit 2022; 28:e936292