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Post-injury bladder management strategy influences lower urinary tract dysfunction in the mouse model of spinal cord injury.

ABSTRACT: To examine the effects of a different number of daily bladder squeezes on bladder dysfunction in mice with spinal cord injury (SCI).Spinal cord was transected at the Th8/9 in female C57BL/6N mice. Their bladders were manually squeezed to eliminate urine inside every day for 4 weeks. The mice were divided into three groups depending on the number of bladder squeezes; A: once daily, B: twice daily, C: three times daily. Four weeks after transection, single-filling cystometry were performed under an awake condition. NGF in the bladder mucosa and mRNA expression of P2X receptors and TRP channels in L6/S1 dorsal root ganglia (DRG) were measured.Bladder weight in group C was less than that of group A. Bladder capacity, post-void residual, and the number of non-voiding contractions during the storage phase were significantly larger in group A compared to group B or C. The level of NGF in groups C were lower compared to group A or B. The expression of P2X3 and TRPA1 in groups B and C was decreased compared to group A. The expression of P2X2 was decreased in groups B compared to group A.The post-injury bladder management after SCI with an increased number of daily bladder emptying improves the storage and voiding bladder dysfunction associated with the reduction of NGF in the bladder as well as P2X and TRP transcripts in lumbosacral DRG.

SUBMITTER: Wada N

PROVIDER: S-EPMC5650194 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature

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Post-injury bladder management strategy influences lower urinary tract dysfunction in the mouse model of spinal cord injury.

Wada Naoki N Shimizu Takahiro T Takai Shun S Shimizu Nobutaka N Kanai Anthony J AJ Tyagi Pradeep P Kakizaki Hidehiro H Yoshimura Naoki N

Neurourology and urodynamics 20161024 5

<h4>Aims</h4>To examine the effects of a different number of daily bladder squeezes on bladder dysfunction in mice with spinal cord injury (SCI).<h4>Methods</h4>Spinal cord was transected at the Th8/9 in female C57BL/6N mice. Their bladders were manually squeezed to eliminate urine inside every day for 4 weeks. The mice were divided into three groups depending on the number of bladder squeezes; A: once daily, B: twice daily, C: three times daily. Four weeks after transection, single-filling cyst ...[more]

PMID: 27778376

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Project description:BackgroundTraumatic spinal cord injury (SCI) is also a combat-related injury that is increasing in modern warfare. The aim of this work is to inform medical experts regarding the different course of bladder cancer in able-bodied patients compared with SCI patients based on the latest medical scientific knowledge, and to present decision-making aids for the assessment of bladder cancer as a late sequela of traumatic SCI.MethodsA study conducted between January 1998 and December 2019 in the BG Trauma Hospital Hamburg formed the basis for the decision-making aids. Urinary bladder cancer was diagnosed in 40 out of 7396 treated outpatient and inpatient SCI patients. General patient information, latency period, age at initial diagnosis, type of bladder management and survival of SCI patients with bladder cancer were collected and analysed. T category, grading and tumour entity in these patients were compared with those in the general population. Relevant bladder cancer risk factors in SCI patients were analysed. Furthermore, relevant published literature was taken into consideration.ResultsInitial diagnosis of urinary bladder cancer in SCI patients occurs at a mean age of 56.4 years (SD ± 10.7 years), i.e., approximately 20 years earlier as compared with the general population. These bladder cancers are significantly more frequently muscle invasive (i.e., T category ≥ T2) and present a higher grade at initial diagnosis. Furthermore, SCI patients show a significantly higher proportion of the more aggressive squamous cell carcinoma than that of the general population in areas not endemic for the tropical disease schistosomiasis. Consequently, the survival time is extremely unfavourable. A very important finding, for practical reasons is that, in the Hamburg study as well as in the literature, urinary bladder cancer is more frequently observed after 10 years or more of SCI. Based on these findings, a matrix was compiled where the various influencing factors, either for or against the recognition of an association between SCI and urinary bladder cancer, were weighted according to their relevance.ConclusionsThe results showed that urinary bladder cancer in SCI patients differs considerably from that in able-bodied patients. The presented algorithm is an important aid in everyday clinical practice for assessing the correlation between SCI and bladder cancer.

Dataset Information

Post-injury bladder management strategy influences lower urinary tract dysfunction in the mouse model of spinal cord injury.

Publications

Post-injury bladder management strategy influences lower urinary tract dysfunction in the mouse model of spinal cord injury.

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