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Journal article
Locomotor Exercise Enhances Supraspinal Control of Lower-Urinary-Tract Activity to Improve Micturition Function after Contusive Spinal-Cord Injury
Cells (Basel, Switzerland), v 11(9), 1398
20 Apr 2022
PMID: 35563703
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The recovery of lower-urinary-tract activity is a top priority for patients with spinal-cord injury. Historically, locomotor training improved micturition function in both patients with spinal cord injury and animal models. We explore whether training augments such as the supraspinal control of the external urethral sphincter results in enhanced coordination in detrusor-sphincter activity. We implemented a clinically relevant contusive spinal-cord injury at the 12th thoracic level in rats and administered forced wheel running exercise for 11 weeks. Awake rats then underwent bladder cystometrogram and sphincter electromyography recordings to examine the micturition reflex. Subsequently, pseudorabies-virus-encoding red fluorescent protein was injected into the sphincter to trans-synaptically trace the supraspinal innervation of Onuf's motoneurons. Training in the injury group reduced the occurrence of bladder nonvoiding contractions, decreased the voiding threshold and peak intravesical pressure, and shortened the latency of sphincter bursting during voiding, leading to enhanced voiding efficiency. Histological analysis demonstrated that the training increased the extent of spared spinal-cord tissue around the epicenter of lesions. Compared to the group of injury without exercise, training elicited denser 5-hydroxytryptamine-positive axon terminals in the vicinity of Onuf's motoneurons in the cord; more pseudorabies virus-labeled or c-fos expressing neurons were detected in the brainstem, suggesting the enhanced supraspinal control of sphincter activity. Thus, locomotor training promotes tissue sparing and axon innervation of spinal motoneurons to improve voiding function following contusive spinal-cord injury.
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Details
- Title
- Locomotor Exercise Enhances Supraspinal Control of Lower-Urinary-Tract Activity to Improve Micturition Function after Contusive Spinal-Cord Injury
- Creators
- Lingxiao Deng - Indiana University School of Medicine - LafayetteTao Sui - Nanjing Medical UniversityDong V Wang - Drexel UniversityShaoping Hou - Drexel UniversityXiaojian Cao - Nanjing Medical UniversityKaiwen Peng - Indiana University School of Medicine - LafayetteZaocheng Xu - Indiana University School of Medicine - LafayetteXiaoming Xu - Indiana University School of Medicine - Lafayette
- Publication Details
- Cells (Basel, Switzerland), v 11(9), 1398
- Publisher
- MDPI
- Grant note
- N/A / Mari Hulman George Endowment Funds R01 NS099076, R01MH119102 / NIH HHS R01 NS100531, R01 NS103481, R01 NS111776 / NIH HHS I01 BX002356, I01 BX003705, I01 RX002687 / United States Department of Veterans Affairs N/A / the Indiana Traumatic Spinal Cord and Brain Injury Research Fund from the Indiana State Department of Health
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Neurobiology and Anatomy
- Web of Science ID
- WOS:000794477000001
- Scopus ID
- 2-s2.0-85128814273
- Other Identifier
- 991019167857504721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Cell Biology