Symptom Severity, Mood, and Healthcare Use Are Associated With Satisfaction in Patients With Irritable Bowel Syndrome

A "Janus" structured nanoclay microgel system for targeted probiotic therapy in diarrhea-predominant irritable bowel syndrome

Probiotic therapy holds potential for preventing and treating various gastrointestinal diseases, including diarrhea-predominant irritable bowel syndrome (IBS-D). Previous studies have suggested that it can help restore intestinal mucosal immunity and gut microbiota dysbiosis in IBS-D patients. Probiotics regulate host microbial metabolism and immune homeostasis, thereby improving host health. Effective and persistent colonization is crucial for probiotic therapy, but oral probiotics often suffer from limited efficacy due to loss of biological activity and insufficient colonization in the complex intestinal environment. Currently, formulations that specifically target gut mucosal colonization are scarce. We developed a "Janus" structured nanoclay microgel via microfluidics encapsulating Pediococcus pentosaceus Li05 (Li05) towards this end. Polydopamine enhanced the microgel's adhesion to the intestinal mucosa, prolonging its residence time in the intestine and enabling targeted delivery of active Li05. The nanoclay promoted Li05 aggregation and growth through charge adsorption, preserving its biological activity and ensuring an effective dose for gut colonization. In vivo studies demonstrated that the nanoclay microgel significantly alleviated diarrhea, mucosal inflammation, and gut microbiota dysbiosis in an IBS-D rat model. These findings suggest that this nanoclay microgel is an effective gut targeted formulation able to promote probiotic growth, offering new approaches for future probiotic therapy in IBS-D.

Satisfaction With Telehealth Among Patients With Irritable Bowel Syndrome During COVID-19: Cross-Sectional Survey Findings

INTRODUCTION

Coronavirus disease 2019 rapidly shifted health care toward telehealth. We assessed satisfaction with and preferences for telehealth among patients with irritable bowel syndrome (IBS).

METHODS

We conducted a cross-sectional survey in an integrated healthcare system in Southern California with members aged 18-90 years with an International Classification of Diseases 9 and 10 codes for IBS from office-based encounters between June 1, 2018, and June 1, 2020. Eligible patients were emailed a survey assessing telehealth satisfaction overall and by patient-related factors, IBS characteristics, health and technologic literacy, utilization, and coronavirus disease 2019 perceptions. We identified perceived telehealth benefits and challenges. Multivariable logistic regression identified predictors of telehealth dissatisfaction.

RESULTS

Of 44,789 surveys sent, 5,832 (13.0%) patients responded and 1,632 (3.6%) had Rome IV IBS. Among 1,314 (22.5%) patients with IBS and prior telehealth use (mean age 52.6 years [17.4]; 84.9% female; and 59.4% non-Hispanic White, 29.0% Hispanic, and 5.6% non-Hispanic Black), 898 (68.3%) were satisfied, 130 (9.9%) were dissatisfied, and 286 (21.8%) felt neutral. In addition, 78.6% would use telehealth again. Independent predictors of telehealth dissatisfaction include social media use of once a week or less (adjusted odds ratio [OR] = 2.1; 1.3-3.5), duration of IBS for <1 year (adjusted OR = 8.2; 1.9-35.8), and willingness to travel 60 plus minutes for face-to-face visits (adjusted OR = 2.6; 1.4-3.7). Patients' main concern with telehealth was a lack of physical examination.

DISCUSSION

Most of the patients with IBS are satisfied with telehealth. Shorter duration of IBS diagnosis, comfort with technology, and increased willingness to travel were associated with telehealth dissatisfaction. These predictors may help identify a target population for a focused IBS-telehealth program.

Baseline Predictors of Discontinuation of Prescription Drug Therapy for IBS-C: Cohort Analysis at an Integrated Healthcare System

BACKGROUND

Effective prescription drug treatment of constipation-predominant irritable bowel syndrome (IBS-C) requires patients to remain on daily therapy, yet predictive factors to optimize treatment selection are unknown.

AIMS

We assessed whether common comorbidities including chronic overlapping pain conditions (COPCs), mood disorders, or concurrent medications influence the risk of discontinuing IBS-C prescription drug therapy.

METHODS

We included all IBS-C patients who initiated treatment with the secretagogues linaclotide or lubiprostone across the Michigan Medicine healthcare system between 2012 and 2016. A Cox proportional hazards model was constructed to model time-to-treatment discontinuation as a valid, quantifiable measure of IBS medication persistence using hazards ratios (HR) with 95% confidence intervals (CI).

RESULTS

Our cohort included 225 patients on linaclotide and 492 on lubiprostone (mean age 48.3 years, 86.9% women, 46.6% with at least one COPC, 60.3% with at least one mood disorder) with an average follow-up of 2.1 years. Patients with at least one COPC (HR = 0.566; 95%CI = 0.371-0.863) and also women (HR = 0.535; 95%CI = 0.307-0.934) had a lower risk of discontinuing linaclotide, while COPCs predicted a trend toward increased discontinuation of lubiprostone (HR = 1.254; 95%CI = 0.997-1.576). Age, comorbid mood disorders, and baseline use of narcotics or benzodiazepines did not significantly mediate the risk of treatment discontinuation; our findings remained stable in univariate and multivariable analyses.

CONCLUSIONS

COPCs and sex appear to influence the likelihood of discontinuation of two commonly prescribed secretagogues, while mood disorders, narcotics, and benzodiazepines may not. Routine assessment for comorbid COPCs prior to initiating therapy may optimize IBS-C treatment selection and outcomes in practice.

Effect of antibiotic pretreatment on bacterial engraftment after Fecal Microbiota Transplant (FMT) in IBS-D

Fecal microbiota transplantation (FMT) is an attractive strategy to correct microbial dysbiosis in diarrhea-predominant irritable bowel syndrome (IBS-D). Although the mechanism of FMT is thought to be bacterial engraftment, the best approach to achieve engraftment after FMT in IBS-D (and other diseases) is not clear. We evaluated the effect of FMT (with or without pretreatment with antibiotics) on gut microbiome and symptoms in patients with IBS-D. In this randomized, placebo-controlled, single-center study, 44 patients with IBS-D with a least moderate severity (IBS severity scoring system, i.e., IBS-SSS, ≥175) were randomly assigned to one of four groups: single-dose oral FMT alone, single-dose oral FMT following a 7-day pretreatment course of Ciprofloxacin and Metronidazole (CM-FMT) or Rifaximin (R-FMT), or Placebo FMT. Primary endpoint was engraftment post-FMT and secondary endpoints were changes in IBS-SSS, and IBS-quality of life (IBS-QOL) at week 10. Median engraftment was significantly different among the three FMT groups (P = .013). Engraftment post-FMT was significantly higher in the FMT alone arm (15.5%) compared to that in R-FMT group (5%, P = .04) and CM-FMT group (2.4%, P = .002). The mean change in IBS-SSS and IBS-QOL from baseline were not significantly different among the four groups or between the three FMT groups combined vs. placebo at week 10. In summary, antibiotic pretreatment significantly reduced bacterial engraftment after FMT in patients with IBS-D.

Bacteriophage-mediated manipulations of microbiota in gastrointestinal diseases

Although some gastrointestinal diseases could be managed using various antibiotics regimen, this therapeutic approach lacks precision and damages the microbiota. Emerging literature suggests that phages may play a key role in restoring the gut microbiome balance and controlling disease progression either with exogenous phage intervention or filtered fecal transplantation or even engineered phages. In this review, we will discuss the current phage applications aiming at controlling the bacterial population and preventing infection, inflammation, and cancer progression in the context of gastrointestinal diseases.

Price Is Right: Exploring Prescription Drug Coverage Barriers for Irritable Bowel Syndrome Using Threshold Pricing Analysis

BACKGROUND

Prescription drug costs exert profound effects on commercial insurance coverage and access to effective therapy.

AIMS

We aimed to assess threshold pricing to achieve budget neutrality of FDA-approved drugs treating irritable bowel syndrome from an insurance perspective, based on cost-savings resulting in decreased healthcare utilization through effective disease management.

METHODS

We constructed a decision-analytic model from an insurance perspective to assess the budget impact of IBS prescription drugs under usual insurance coverage levels in practice: (1) unrestricted drug access or (2) step therapy in a primary care population of middle-age, care-seeking IBS patients. Budget-neutral drug prices were then calculated which resulted in $0 budget impact to insurers with a short-term, one-year time horizon.

RESULTS

If used according to FDA labeling, IBS-D drugs cost between $4778 and $16,844 per year and IBS-C drugs cost between $4319 and $4955 per year. These drug costs often exceed insurance expenditures of $6999 for IBS-D and $3929 for IBS-C if left untreated. Therefore, for drugs to have $0 budget impact to insurers, their prices would need to be discounted 36.7-74.2% for IBS-D drugs and 59.3-82.5% for IBS-C. IBS drugs are already priced to support step therapy "failing one of several common, inexpensive IBS treatments with a responder rate > 30-40%," reflecting the subpopulation with more severe disease and greater healthcare costs.

CONCLUSIONS

Broader prescription drug coverage for patients failing common, inexpensive IBS treatments to which at least 30-40% of patients would typically respond appears warranted to enable gastroenterologists to offer personalized approaches targeting specific mechanisms of this heterogeneous disease.

Efficacy of a low-FODMAP diet in adult irritable bowel syndrome: a systematic review and meta-analysis

Purpose

This review provides an updated overview of observational and intervention studies investigating the effect of a low-FODMAP (fermentable oligo-, di- and monosaccharides, and polyols) diet (LFD) on gastrointestinal (GI) symptoms, quality of life (QoL), nutritional adequacy, and gut microbiome in irritable bowel syndrome (IBS) patients.

Methods

We systematically searched available literature until October 2020 for studies that investigated the effect of LFDs on GI symptoms, QoL, nutritional adequacy, and the gut microbiome in IBS patients. The data were represented as standardized mean differences (SMD) for IBS severity, and as mean differences (MD) for IBS-QoL. Meta-analyses were performed for the quantitative analyses using random effects models with inverse variance weighing.

Results

Twelve papers (nine parallel trials, three crossover studies) were included for the meta-analysis. The LFD reduced IBS severity by a moderate-to-large extent as compared to a control diet (SMD − 0.66, 95% CI − 0.88, − 0.44, I² = 54%). When analyzing only studies that used the validated IBS-SSS questionnaire, a mean reduction of 45 points (95% CI − 77, − 14; I² = 89%) was observed. Subgroup analyses on adherence, age, intervention duration, IBS subtype, outcome measure, and risk of bias revealed no significantly different results. The LFD also increased IBS-QoL scores, when compared with a control diet (MD 4.93; 95% CI 1.77, 8.08; I² = 42%).

Conclusions

The low-FODMAP diet reduces GI symptoms and improves quality of life in IBS subjects as compared to control diets. Future work is required to obtain definitive answers regarding potential long-term effects of such diets on nutritional adequacy and the gut microbiome.

PROSPERO registration number

CRD42020175157.

Supplementary Information

The online version contains supplementary material available at 10.1007/s00394-020-02473-0.