Neurogenic mechanisms in bladder and bowel ageing

Long-term efficacy and complications of a multicentre randomised controlled trial comparing retropubic and transobturator mid-urethral slings: a prospective observational study

OBJECTIVE

There are concerns regarding the risks of mid-urethral slings (MUS) for stress urinary incontinence (SUI), particularly because of the lack of long-term data. We compare patient-reported outcomes of a multicentre randomised controlled trial of retropubic (TVT, GYNECARE™) versus transobturator (TOT, MONARC™) tape surgery at 12 years.

DESIGN AND SETTING

A multicentre study was performed in 11 tertiary referral centres.

POPULATION

A cohort of 180 participants from the original trial, the majority of whom had mixed urinary incontinence.

METHODS

Postal questionnaire survey of patient-reported outcome measures using the International Consultation on Incontinence Questionnaire, Patient Global Impression of Improvement questionnaire (PGI-I) and a numeric rating scale pain questionnaire.

MAIN OUTCOME MEASURES

Comparison of the efficacy and complications between the TVT and TOT procedures in the long term.

RESULTS

A total of 110/180 responses were received: 55 for TVT and 55 for TOT. The mean follow-up was 12.8 ± 0.29 years (SD). TVT was significantly superior to TOT: 41.8% TVT with no SUI, versus 21.8% TOT (P = 0.04). Urgency urinary incontinence (UUI) was the most bothersome urinary symptom: 14.5% of respondents reported UUI after TVT and TOT. This was an improvement from the baseline levels: 61.8% TVT and 76.4% TOT. Seventeen patients (9 TVT and 8 TOT) out of 121 reported moderate or severe pain with severe pain in 3 with TVT and 2 with TOT. Overall, 80% TVT and 77% TOT participants reported their symptoms as improved on the PGI-I.

CONCLUSIONS

TVT is superior to TOT for SUI cure. Efficacy is reduced by 12 years. There is low incidence of severe vaginal or groin pain. Careful patient counselling on long-term outcomes is required. The Retropubic tape appears to be an effective treatment for the majority of women with SUI.

TWEETABLE ABSTRACT

Retropubic tape has superior efficacy to transobturator tape. Complications are comparable with low rates.

Neurokinin 2 receptor-mediated bladder and colorectal responses in aged spinal cord injured rats

STUDY DESIGN

Animal proof of principle study.

OBJECTIVES

Bladder and bowel dysfunction are common after spinal cord injury (SCI) and in the elderly. Neurokinin 2 receptor agonists are known to produce on-demand urination and defecation in adult SCI rats. This study compared the ability of a neurokinin 2 receptor (NK2R) agonist to produce bladder and colorectal contractions in both young adult and aged SCI rats.

SETTING

Dignify Therapeutics and Integrated Laboratory Systems, Durham, NC USA.

METHODS

Bladder and colorectal pressure and voiding efficiency were measured in response to the NK2R agonist, [Lys5,Me,Leu9,Nle10]-NKA_(4-10) (LMN-NKA), in anesthetized animals. The potency and efficacy of LMN-NKA was examined in young adult and aged SCI (T3 or T9 transected) rats, with young adult and aged spinal intact rats included as controls.

RESULTS

LMN-NKA (3-300 μg/kg i.v.) produced dose-dependent increases in bladder and colorectal pressure in all anesthetized rats. No differences in the bladder or colorectal pressure responses or voiding efficiency were observed with age or after SCI. The level of SCI did not change the pharmacodynamic responses to the agonist.

CONCLUSIONS

An NK2R agonist produced similar responses in young adult and aged SCI rats, suggesting this class of agonists could be used as a potential therapy to induce on-demand urination and defecation in aged populations, with or without SCI.

Disorders of the enteric nervous system - a holistic view

The enteric nervous system (ENS) is the largest division of the peripheral nervous system and closely resembles components and functions of the central nervous system. Although the central role of the ENS in congenital enteric neuropathic disorders, including Hirschsprung disease and inflammatory and functional bowel diseases, is well acknowledged, its role in systemic diseases is less understood. Evidence of a disordered ENS has accumulated in neurodegenerative diseases ranging from amyotrophic lateral sclerosis, Alzheimer disease and multiple sclerosis to Parkinson disease as well as neurodevelopmental disorders such as autism. The ENS is a key modulator of gut barrier function and a regulator of enteric homeostasis. A 'leaky gut' represents the gateway for bacterial and toxin translocation that might initiate downstream processes. Data indicate that changes in the gut microbiome acting in concert with the individual genetic background can modify the ENS, central nervous system and the immune system, impair barrier function, and contribute to various disorders such as irritable bowel syndrome, inflammatory bowel disease or neurodegeneration. Here, we summarize the current knowledge on the role of the ENS in gastrointestinal and systemic diseases, highlighting its interaction with various key players involved in shaping the phenotypes. Finally, current flaws and pitfalls related to ENS research in addition to future perspectives are also addressed.

Functional and anatomical deficits in visceral nociception with age: a mechanism of silent appendicitis in the elderly?

The ability to sense visceral pain during appendicitis is diminished with age leading to delay in seeking health care and poorer clinical outcomes. To understand the mechanistic basis of this phenomenon, we examined visceral nociception in aged mouse and human tissue. Inflamed and noninflamed appendixes were collected from consenting patients undergoing surgery for the treatment of appendicitis or bowel cancer. Supernatants were generated by incubating samples in buffer and used to stimulate multiunit activity in intestinal preparations, or single-unit activity from teased fibres in colonic preparations, of young and old mice. Changes in afferent innervation with age were determined by measuring the density of calcitonin gene-related peptide-positive afferent fibres and by counting dorsal root ganglia back-labelled by injection of tracer dye into the wall of the colon. Finally, the effect of age on nociceptor function was studied in mouse and human colon. Afferent responses to appendicitis supernatants were greatly impaired in old mice. Further investigation revealed this was due to a marked reduction in the afferent innervation of the bowel and a substantial impairment in the ability of the remaining afferent fibres to transduce noxious stimuli. Translational studies in human tissue demonstrated a significant reduction in the multiunit but not the single-unit colonic mesenteric nerve response to capsaicin with age, indicative of a loss of nociceptor innervation. Our data demonstrate that anatomical and functional deficits in nociception occur with age, underpinning the atypical or silent presentation of appendicitis in the elderly.

Urinary incontinence in older adults: what you need to know

Incontinence is a problem that can affect individuals of all ages. However, it is more frequently seen in older adults. It is a common geriatric syndrome, and its investigation should form part of a comprehensive geriatric assessment. Continence problems are usually ignored by patients and not reported to a medical professional, but with simple assessment and even simpler interventions, a significant improvement can be made for those living with incontinence. Most cases need a simple clinical assessment consisting of a good history and basic examination covering the abdomen, external genitalia and rectum. If no reversible causes are found, further investigations can be considered. The treatment for incontinence can be split into non-surgical and surgical management. Simple conservative measures, such as education around fluid intake, weight loss, managing constipation and pelvic floor exercises, can make a huge and positive impact on managing incontinence. If these are not effective, pharmaceutical therapies and surgical management can be considered, but there needs to be a careful consideration of the risk vs benefit in frail older adults.

Characteristics of urodynamic study parameters associated with intermediate-term continence after robot-assisted radical prostatectomy in elderly patients

PURPOSE

To investigate the relationship between urodynamic study (UDS) data and recovery of urinary incontinence (UI) in elderly patients who underwent robot-assisted radical prostatectomy (RARP).

MATERIALS AND METHODS

Seventy-five prostate cancer (PCa) patients received UDS before and at 3 months after RARP. They were divided into two groups; a younger group (<70 years old, n = 47) and older group (≥70 years, n = 28), and each was classified according to urinary continence (UC) or UI at 3 months post-RARP. Continence was defined as being pad-free or 1-safety pad usage per day.

RESULTS

In the older group, preoperative maximum urethral closure pressure (MUCP) in the UI group was significantly lower than that in the UC group. Detrusor overactivity (DO) rate was significantly higher in the older UI group than in the older UC group at both pre- and 3 months post-RARP. Persistent DO rate pre- and post-RARP was significantly higher in the older group than in the younger group. Regardless of age, postoperative DO was an independent predictor of UI 6 months post-RARP.

CONCLUSIONS

In elderly patients, low preoperative MUCP and both pre- and postoperative DO are associated with postoperative UI.

Colonic Motility and Jejunal Vagal Afferent Firing Rates Are Decreased in Aged Adult Male Mice and Can Be Restored by an Aminosterol

There is a general decline in gastrointestinal function in old age including decreased intestinal motility, sensory signaling, and afferent sensitivity. There is also increased prevalence of significant constipation in aged populations. We hypothesized this may be linked to reduced colonic motility and alterations in vagal-gut-brain sensory signaling. Using in vitro preparations from young (3 months) and old (18–24 months) male CD1 mice we report functional age-related differences in colonic motility and jejunal mesenteric afferent firing. Furthermore, we tested the effect of the aminosterol squalamine on colonic motility and jejunal vagal firing rate. Old mice had significantly reduced velocity of colonic migrating motor complexes (MMC) by 27% compared to young mice (p = 0.0161). Intraluminal squalamine increased colonic MMC velocity by 31% in old mice (p = 0.0150), which also had significantly reduced mesenteric afferent single-unit firing rates from the jejunum by 51% (p < 0.0001). The jejunal vagal afferent firing rate was reduced in aged mice by 62% (p = 0.0004). While the time to peak response to squalamine was longer in old mice compared to young mice (18.82 ± 1.37 min vs. 12.95 ± 0.99 min; p = 0.0182), it significantly increased vagal afferent firing rate by 36 and 56% in young and old mice, respectively (p = 0.0006, p = 0.0013). Our results show for the first time that the jejunal vagal afferent firing rate is reduced in aged-mice. They also suggest that there is translational potential for the therapeutic use of squalamine in the treatment of age-related constipation and dysmotility.

Nocturia and its clinical implications in older women

The aim of this study is to demonstrate the relationship between nocturia and geriatric syndromes, and comprehensive geriatric assessment parameters (CGA) in older women. 858 older outpatient women were included in this cross-sectional study. For the nocturia variable, the question, "Generally, during the past 30 days, how many times did you usually urinate after you have gone to sleep at night until the time you got up in the morning?'' was used. The relationships between nocturia status and common geriatric syndromes, and CGA parameters were determined. The mean age of patients was 74.1 ± 8.0 years. The prevalence of patients who reported average of 0, ≥1, ≥2, ≥3, and ≥4 nocturnal episodes was 14.7%, 85.3%, 66.3%, 42.13%, and 24.1%, respectively. When all the covariates including age, education, Charlson Comorbidities Index score, glomerular filtration rate, antimuscarinic drugs and alpha-blockers use, diabetes mellitus, chronic obstructive pulmonary disease, and incontinence were adjusted, there were higher rates of insomnia, recurrent falls and higher scores of Timed Up-Go test in older women with ≥2 nocturia episodes (p < 0.05). There was a significant correlation between ≥3 nocturia episodes and lower Instrumental Activities of Daily Living scores and a significant correlation between ≥4 nocturnal episodes and frailty and polypharmacy (p < 0.05). Nocturia is quite common and associated with insomnia, frailty, polypharmacy, incontinence, falls, lower gait speed, and functionality in older women.Therefore, nocturia is very important for geriatric practice and ≥2 nocturia episodes can be a marker of poor health status in older women.

Quality of Life Changes >10 Years After Postoperative Radiation Therapy After Radical Prostatectomy for Prostate Cancer

PURPOSE

To analyze long-term quality-of-life (QoL) changes related to postoperative radiation therapy (RT) after radical prostatectomy.

METHODS AND MATERIALS

Patients who received postoperative 3-dimensional conformal RT in the years 2003 to 2008 with 1.8 to 2.0 Gy fractions up to 66.0 to 66.6 Gy (n = 181) were surveyed using the Expanded Prostate Cancer Index Composite questionnaire before the beginning of RT (A); on the last day (B); and 2 months (C), 1 to 3 years (D), 6 to 9 years (E), and 10 to 13 years (F) after RT.

RESULTS

Mean urinary bother, urinary incontinence bother, and bowel bother score changes (in relation to baseline at time A) of 13, 14, and 7 and 14, 15, and 7 were found at times E and F, respectively (P < .01 for all comparisons). Sexual function scores decreased 6 and 8 points on average (P < .01). Patient age at the time of RT had a considerable impact on urinary bother and urinary incontinence bother, with increasing differences over time when comparing patients aged <68 versus ≥68 years: 0 versus 7 and 0 versus 7 points at time D and 8 versus 23 and 6 versus 35 points at time F, respectively. Patients who did not respond to RT with a decreasing prostate-specific antigen level had greater urinary and urinary incontinence bother and bowel bother score changes >10 years after treatment (25 vs 12; P = .04, 36 vs 10; P = .03, and 20 vs 5; P = .07, respectively). A higher rectal dose was associated with greater acute and long-term bowel bother score decrease. No correlation was found between the dose to the bladder and QoL changes.

CONCLUSIONS

In contrast to early evaluations in the first years, significantly decreasing QoL in the urinary, bowel, and sexual domains was found >5 years after RT. Aging is likely to be a major factor. Younger patients who responded to the treatment had the most favorable long-term QoL results. As 3-dimensional conformal RT was used in this study, intensity modulated concepts could result in improved outcomes.

Overactive bladder symptoms after midurethral sling surgery in women: Risk factors and management

INTRODUCTION

Overactive bladder syndrome (OAB) including urgency and urgency urinary incontinence (UUI) occurs frequently after stress urinary incontinence (SUI) surgery. It is important to identify the risk factors for the occurrence of OAB symptoms in order to adequately inform the patient before surgery. Furthermore, when facing OAB after sling surgery it is crucial to know how to manage these symptoms.

METHODS

We conducted a literature review in order to assess the risk factors and management of OAB symptoms after SUI surgery. We searched for relevant articles in PubMed that specifically addressed the topic of OAB symptoms after midurethral sling surgery.

RESULTS

The incidence of de novo and persistent urgency and UUI is reported around 15% and 30%, respectively. Several studies demonstrated that women with mixed incontinence who have a predominant urge component will have worse outcomes after surgery. Older age was also found to be a predictive factor in three studies. Furthermore, urodynamic signs of overactive bladder (eg, DO, low bladder capacity, elevated detrusor pressure) can predict postoperative urgency or UUI. The management of OAB symptoms after SUI surgery is essentially the same as in idiopathic OAB. However, before commencing therapy it is crucial to rule out other factors than can cause urgency, including bladder outlet obstruction, urinary tract infection, or sling erosion.

CONCLUSIONS

OAB symptoms are frequently reported after sling surgery. Women with mixed incontinence and older women are at risk of developing post-operative OAB symptoms. We have proposed an algorithm for the treatment of these symptoms which can be useful in clinical practice.