Irritable Bowel Syndrome Symptoms Research Articles

Enhanced Physical Capacity and Gastrointestinal Symptom Improvement in Southern Italian IBS Patients following Three Months of Moderate Aerobic Exercise.

Moderate-intensity aerobic exercise improves gastrointestinal (GI) health and alleviates irritable bowel syndrome (IBS) symptoms. This study explored its effects on physical capacity (PC) and IBS symptoms in 40 patients from Southern Italy (11 males, 29 females; 52.10 ± 7.72 years). The exercise program involved moderate-intensity aerobic exercise (60/75% of HRmax) for at least 180 min per week. Before and after the intervention, participants completed the IBS-SSS questionnaire to assess IBS symptoms, reported their physical activity levels, and underwent field tests to evaluate PC. PC was quantified as the Global Physical Capacity Score (GPCS). A total of 38 subjects (21 males, 17 females; 53.71 ± 7.27 years) without lower GI symptoms served as a No IBS group. No significant differences were found between IBS patients and No IBS subjects, except for the symptom score, as expected. After the exercise, all participants experienced significant improvements in both IBS symptoms and PC. Higher PC levels correlated with greater benefits in IBS symptomatology, especially with GPCS reaching above-average values. Engaging in moderate-intensity aerobic exercise for at least 180 min per week positively impacts IBS symptoms and PC. Monitoring GPCS in IBS patients provides insights into the connection between physical activity and symptom severity, aiding healthcare professionals in tailoring effective treatment plans.

Lactococcus lactis CNCM I-5388 versus NCDO2118 by its GABA hyperproduction ability, counteracts faster stress-induced intestinal hypersensitivity in rats.

Irritable bowel syndrome (IBS) is a functional gastrointestinal disorder characterized by its main symptom, visceral hypersensitivity (VH), which is aggravated by stress. Gut-brain interactions and gut bacteria may alleviate IBS symptoms, including VH. γ-amino butyric acid (GABA), produced notably by lactic acid bacteria (LAB), shows promising result in IBS symptoms treatment. In bacteria, GABA is generated through glutamate decarboxylase (GAD) metabolism of L-glutamic acid, maintaining intracellular pH. In mammals, GABA acts as an inhibitory neurotransmitter, modulating pain, stress, and anxiety. Therefore, utilizing GABA-producing LAB as a therapeutic approach might be beneficial. Our previous work showed that a GABA-producing Lactococcus lactis strain, NCDO2118, reduced VH induced by acute stress in rats after a 10-day oral treatment. Here, we identified the strain CNCM I-5388, with a four-fold higher GABA production rate under the same conditions as NCDO2118. Both strains shared 99.1% identical GAD amino acid sequences and invitro analyses revealed the same optimal pH for GAD activity; however, CNCM I-5388 exhibited 17 times higher intracellular GAD activity and increased resistance to acidic pH. Additionally, invivo experiments have demonstrated that CNCM I-5388 has faster anti-VH properties in rats compared with NCDO2118, starting from the fifth day of treatment. Finally, CNCM I-5388 anti-VH effects partially persisted after 5-day treatment interruption and after a single oral treatment. These findings highlight CNCM I-5388 as a potential therapeutic agent for managing VH in IBS patients.

Factors That Predict Magnitude, Timing, and Persistence of Placebo-Like Response in Patients With Irritable Bowel Syndrome

Placebo response impedes the development of novel irritable bowel syndrome (IBS) therapies and the interpretability of randomized clinical trials. This study sought to characterize the magnitude, timing, and durability of IBS symptom relief in patients undergoing a non-drug placebo-like control. One hundred forty-five Rome III-diagnosed patients (80% F, M age = 42 years) were assigned to education/nondirective support delivered over a 10-week acute phase. Treatment response was based on the IBS version of the Clinical Global Improvement Scale completed 2 weeks after treatment ended. Candidate predictors were assessed at baseline (eg, emotion regulation, pain catastrophizing, distress, neuroticism, stress, somatization, gastrointestinal-specific anxiety) or clinically relevant points during treatment (patient-provider relationship, treatment expectancy/credibility). Midtreatment response was associated with lower levels of stress and somatization at baseline and greater patient-provider agreement on treatment tasks (P < .001). Treatment response was associated with baseline gastroenterologist-rated IBS severity, anxiety, ability to reappraise emotions to reduce their impact [cognitive reappraisal], and agreement that provider and patient shared goals from provider perspective (P < .001). The day-to-day ability to reappraise emotions at baseline distinguished rapid from delayed placebo responders (P = .011). Patient beliefs (eg, perceived stress, cognitive reappraisal) impacted the magnitude, timing, and persistence of placebo response measured at midway point of acute phase and 2 weeks after treatment discontinuation. Baseline beliefs that patients could alter the impact of stressful events by rethinking their unpleasantness distinguished rapid vs delayed placebo responders. Collaborative agreement between doctor and patient around shared tasks/goals from the clinician perspective predicted placebo response.

Distinct Food Triggers for Migraine, Medication Overuse Headache and Irritable Bowel Syndrome.

Irritable bowel syndrome (IBS) is an under-diagnosed common health problem that impairs quality of life. Migraine and IBS are comorbid disorders that are triggered by foods. We aim to investigate IBS frequency in medication overuse headache (MOH) patients and identify food triggers and food avoidance behavior. Participants who completed the cross-sectional, observational and online survey were included (n = 1118). Demographic data, comorbid disorders, medications used, presence of headache, the diagnostic features of headache and IBS, migraine related subjective cognitive symptoms scale (MigSCog), consumption behavior of patients regarding 125 food/food additives and food triggers were asked about in the questionnaire. Migraine and MOH diagnoses were made in 88% and 30.7% of the participants, respectively. Non-steroidal anti-inflammatory drugs (NSAIDs) were the main overused drug (89%) in MOH patients. IBS symptoms were present in 35.8% of non-headache sufferers, 52% of migraine patients and 65% of MOH patients. Specific food triggers for MOH patients were dopaminergic and frequently consumed as healthy foods such as banana, apple, cherry, apricot, watermelon, olive, ice cream and yogurt. MigSCog scores were significantly higher in episodic migraine and MOH patients when IBS symptoms coexisted. The frequency of IBS was higher in MOH patients compared to migraine patients. Coexistence of IBS seems to be a confounding factor for cognitive functions. MOH specific triggers were mostly dopaminergic foods, whereas migraine specific food triggers were mostly histaminergic and processed foods. Personalized diets focusing on food triggers and interference with leaky gut must be integrated to MOH and migraine treatment to achieve sustainable management of these disorders.

A starch- and sucrose-reduced diet may lead to improvement of intestinal and extraintestinal symptoms in more conditions than irritable bowel syndrome and congenital sucrase-isomaltase deficiency

ObjectivesA starch- and sucrose-reduced diet has been found to improve gastrointestinal and extraintestinal symptoms in irritable bowel syndrome, as well as reduce weight and improve psychological well-being. Our hypothesis was that a starch- and sucrose-reduced diet would also be beneficial in other conditions with similar symptoms. The aim of the present research letter was to describe the role of a starch- and sucrose-reduced diet in a pilot project in patients with diarrhea having varying causes. MethodsOne man, age 36 y, suffering from functional diarrhea and one woman, 56 y, suffering from microscopic colitis, were randomized to a starch- and sucrose-reduced diet for 4 wk. At baseline, dietary information was given, and blood samples collected. Weight and waist circumference were measured. The participants completed the irritable bowel syndrome severity scoring system for evaluating specific gastrointestinal and extraintestinal symptoms and visual analog scale for irritable bowel syndrome for evaluation of specific gastrointestinal symptoms and psychological well-being. The degrees of satiety and sweet craving were measured on visual analog scales. After 4 wk, all procedures were repeated. ResultsWeight, body mass index, and waist circumference were decreased during the intervention. The total amount of gastrointestinal symptoms was decreased in the participants with functional diarrhea, and diarrhea and bloating were decreased in both participants. Both had reduced extraintestinal symptoms and improved psychological well-being. Blood levels had mainly unchanged or slightly increased values of measurements reflecting nutrient intake. ConclusionsA starch- and sucrose-reduced diet may lead to weight reduction, reduced symptoms, and improved well-being in several patient categories, not only in patients suffering from irritable bowel syndrome. Future randomized trials should be done.

OR35-01 Colonic Mitochondrial Dysfunction and Sub-acute Gastrointestinal Inflammation in Two Hyperandrogenemic Rodent Models of PCOS

Abstract Disclosure: N. Hoang: None. S. Rezq: None. J. Basnet: None. A.M. Huffman: None. K. Brooks: None. L.L. Yanes Cardozo: None. D.G. Romero: None. K.S. Edwards: None. Introduction: Polycystic ovarian syndrome (PCOS) is the most common endocrine disorder in women during their reproductive years. Approximately 80% of PCOS women suffer from hyperandrogenemia. PCOS women often exhibited symptoms of irritable bowel syndrome (IBS) that is associated with sub-acute gastrointestinal (GI) inflammation. However, the underlying pathophysiology for the development of IBS is unknown. Mitochondrial dysfunction is associated with the development of inflammation and hyperandrogenemia can alter mitochondrial function. This study aims to investigate the mechanisms linking PCOS and mitochondrial dysfunction to the development of IBS symptoms. Methods: The hyperandrogenemic female (HAF) rodent models exhibit characteristics similar to PCOS women such as increased body weight, fat mass, and food intake. At 4 weeks of age, female rats received dihydrotestosterone (DHT, 7.5mg/90 days) pellets. At 3 weeks of age female mice were implanted with Silastic tubes filled with DHT (8mg) or vehicle. At 15 weeks of age, colon tissues were collected for histology (H&amp;E staining) and mitochondria isolation. Intact mitochondrial respiration, mitochondrial reactive oxygen species (mtROS), and complex IV activity, a marker for oxidative phosphorylation capacity, were measured using the Oroboros O2k-FluoRespirometer. Data was normalized to mitochondrial content using citrate synthase (CS) activity. Results: Histology from the colon of HAF rats showed an increase in immune cell infiltration and structural derangement. Both HAF rodent models showed an increase in GI inflammation and alterations to colon mitochondrial function. Complex I-driven respiration showed a significant (p&amp;lt;0.05) decrease (60%) in both rats and mice. Both rats and mice showed a significant (p&amp;lt;0.05) decrease (50%) in complex II-driven respiration. Quality of mitochondria is determined by the respiratory control ratio (RCR). A significant (p&amp;lt;0.05) decrease in RCR was observed for both rats (40%) and mice (20%). Both rats and mice showed a 2-fold increase in mtROS (p&amp;lt;0.05). Complex IV activity was significantly (p&amp;lt;0.05) decreased in both rats (3.91±0.97 vs. 5.22±1.13 nmol e-/CS activity) and mice (0.03±0.01 vs. 0.05±0.01 nmol e-/CS activity) compared to control. Conclusions: The observed colonic inflammation and associated mitochondrial dysfunction in both rodent models of PCOS suggests that mitochondrial dysfunction is involved in the development of IBS symptoms in PCOS. This study provides a better understanding of the role of mitochondria in the development of IBS with PCOS and an avenue for the development of strategies to re-establish normal mitochondrial function. This could provide options for preventive and therapeutic interventions for IBS where there are limited treatment options in PCOS women. Supported by NIH grants: P20PGM121334 Presentation Date: Sunday, June 18, 2023

SAT390 Western Diet Exacerbates Colonic Mitochondrial Dysfunction in the Hyperandrogenemic Female Rat Model of Polycystic Ovary Syndrome

Abstract Disclosure: K. Edwards: None. N. Hoang: None. K. Brooks: None. R.M. Quin: None. K. Davenport: None. N.M. Shawky Elsayed: None. Introduction: Polycystic ovarian syndrome (PCOS) is the most common endocrine disorder in women with approximately 80% suffering from hyperandrogenemia. Hyperandrogenemia causes PCOS women to suffer from additional comorbidities such as irritable bowel syndrome (IBS), a result of sub-acute gastrointestinal (GI) inflammation. Diet plays a role in the severity of symptoms. Mitochondrial dysfunction is associated with development of inflammation. Excess androgens can also alter mitochondrial function. This study aims to investigate the mechanisms linking PCOS and diet with the development of IBS. Methods: The hyperandrogenemic female (HAF) rat model exhibits characteristics similar to PCOS women such as increased body weight, fat mass, and food intake. At 4 weeks of age, female rats received dihydrotestosterone (DHT, 7.5mg/90 days, s.c.) pellets and were started on either a control diet (CD; n=9) or a western diet (WD: 17% protein, 43% carbohydrates mainly sucrose, and 40% fat; n=9-11). Two parallel groups of control rats (placebo pellets) were also fed either CD or WD. At 22 weeks of age, colon tissues were collected for mitochondrial isolation. Complex I-driven respiration, complex II-driven respiration or fatty acid oxidation were measured simultaneously with mitochondrial reactive oxygen species (mtROS) using the Oroboros O2k-FluoRespirometer. Data was normalized to mitochondrial content using citrate synthase. Results: In the colons from HAF rats, we observed a significant decrease in mitochondrial complex I-driven respiration (33%, p=0.0174), complex II-driven respiration (34%, p=0.0022), LCFA oxidation (35%, p=0.0309), and MCFA oxidation (47%, p=0.0016) compared to controls. In control females, WD significantly decreased complex I-driven respiration (54%, p=0.0004), complex II-driven respiration (50%, p&amp;lt;0.0001), LCFA oxidation (45%, p=0.006), and MCFA oxidation (58%, p=0.0001). In the HAF rats, WD further decreased complex I-driven respiration (30%, p=0.0144), while all other respirations rates were decreased by 10%. Regardless of substrate provided, colon mtROS was significantly increased in both control (2.6-fold; p=0.0028) and HAF (1.9-fold; p=0.0104) on WD. HAF rats showed a significant increase in in mtROS production compared to controls (1.3-fold increase, p=0.0164). Conclusion: Both hyperandrogenemia and WD consumption induce distinct forms of mitochondrial dysfunction that is exaggerated by the combination of both factors. This suggests that WD consumption could increase the severity in IBS symptoms in hyperandrogenemic PCOS women. This study highlights a potential avenue to the development of strategies to re-establish normal mitochondrial function that would provide options for preventive and therapeutic interventions for IBS where there are limited treatment options in PCOS women. Funding: P20GM121334 (KE, NMS), AHA CDA 938320 (NMS). Presentation Date: Saturday, June 17, 2023

Apigenin attenuates visceral hypersensitivity in water avoidance stress rats by modulating the microbiota-gut-brain axis and inhibiting mast cell activation

Visceral hypersensitivity (VH) and gut microbiota dysbiosis significantly contribute to the occurrence and development of irritable bowel syndrome (IBS), exacerbated by stress. Apigenin, a natural flavonoid derived from plants, possesses a range of beneficial properties. However, additional research is necessary to investigate its potential in alleviating symptoms of IBS and elucidating its underlying mechanisms of action. Our study confirms that apigenin effectively reverses mast cell and microglial activation, regulates the composition and abundance of the gut microbiota, improves intestinal barrier function in rats induced with water-avoidance stress, and mitigates VH and colonic hypermotility. Furthermore, in vitro studies suggest a potential role of dysbiotic gut microbiota in activating mast cells at the cellular level. Notably, apigenin inhibits mast cell degranulation through the toll-like receptor 4 (TLR4) / myeloid differentiation primary response gene 88 (MyD88) / nuclear factor-kappa B (NF-κB) pathway. In conclusion, this study discusses the potential therapeutic effects of apigenin in alleviating VH and modulating the gut-brain axis in water-avoidance stress rats, providing a novel or alternative treatment approach for IBS.

A Study to Evaluate the Effectiveness of "Mindfulness-Based Stress Reduction Therapy(MBSRT)" in Reducing Symptom Severity and Improving Quality of Life in Patients Suffering From Irritable Bowel Syndrome.

Irritable bowel syndrome (IBS) is a functional gastrointestinal disease with a high prevalence. IBS is considered a disorder of brain-gut interaction. Mindfulness-Based Stress Reduction Therapy (MBSRT) is a form of treatment that uses meditation and relaxation to foster awareness and acceptance of the present moment. This kind of therapy requires individuals to practice noticing and observing details about their surroundings without passing judgment or reacting to triggers in the environment. After making the diagnosis of IBS, 30 patients were subjected to concomitant MBSRT in addition to pharmacological therapy(Case Group) while the remaining were given only pharmacotherapy (Control Group). MBSRT was performed by a Clinical Psychologist. Seventeen patients were given only pharmacological therapy (Control Group). Scores were assessed using the IBS Symptom Severity Scale (IBS-SSS), Five Facets of Mindfulness Questionnaire(FFMQ), and World Health Organisation Quality Of Life-BREF (WHO-QOL-BREF) before and after the completion of MBSRT sessions. The study included 47 patients (30 in the case group and 17 in the control group) who presented to Medicine OPD and were diagnosed with IBS. Kendall tau correlation test was applied for IBS-SSS scores, which showed significant improvement in IBS-SSS scores postmindfulness therapy in the case group with P value of <0.001. McNemar test was applied for FFMQ scores, which showed significant improvement in FFMQ scores postmindfulness therapy in the case group with a P value of <0.001. A logistic regression model was also generated, which showed a significant change in QOL scores after MBSRT. IBS patients who received MBSRT had a greater improvement in the quality of life and mindfulness components and reduced IBS symptoms as compared with the control group.

Irritable Bowel Syndrome Patient Experience: A Survey of Patient-Reported Symptoms by Irritable Bowel Syndrome Subtype and Impact on Quality of Life.

Irritable bowel syndrome (IBS) is a chronic, debilitating, functional gastrointestinal disorder with symptoms of abdominal pain, bloating, and altered bowel behaviours of constipation (IBS-C), diarrhea (IBS-D), or a mixture of both (IBS-M). There is limited information published on the impact of symptoms on everyday life in the Canadian population. An online survey was conducted with individuals diagnosed with IBS to capture the severity and frequency of patient-reported symptoms, including impact on productivity, quality of life, healthcare utilization, treatment access, and corresponding symptom relief. Responses from the three subtypes of IBS were categorized to illustrate differences among these. There were 2,470 qualified respondents (filtered from 2,981, which included nonspecific IBS). IBS-M was the most common subtype, at 44 percent. Most individuals from all three IBS subtypes reported experiencing moderate to severe abdominal pain (63-70 percent) and bloating (59-75 percent) over the previous 3 months. Persons living with IBS-C reported severe bloating (32 percent), straining (72 percent), and tenesmus (78 percent) whereas those with IBS-D experienced severe urgency (63 percent) and incontinence (29 percent). Symptoms interfered in daily life, sometimes in 46 percent and often in 23 percent of respondents. Patients reported mood and anxiety disorders as common comorbidities with IBS (mood disorders: 30-34 percent; anxiety disorders: 25-30 percent). This study focuses on the differences among the IBS subtypes. IBS impacts productivity and healthcare utilization, which requires further investigation on approaches to improve treatment. The frequency and severity of symptoms in IBS are high and only a few respondents reported that their symptoms are under control.

Efficacy of probiotics, prebiotics and synbiotics in irritable bowel syndrome: a systematic review and meta-analysis of randomized, double-blind, placebo-controlled trials.

Introduction. Irritable bowel syndrome (IBS) is a common gastrointestinal disorder that affects the quality of life of numerous people worldwide.Gap statement. The therapeutic role of gut microbiota modulation in IBS remains controversial.Aim. We aimed to assess the efficacy of probiotics, prebiotics or synbiotics in patients with IBS.Methodology. We searched MEDLINE and EMBASE up to 1 August 2023, to identify the randomized, double-blind, placebo-controlled trials investigating the effectiveness of probiotics, prebiotics or synbiotics among patients with IBS. Pooled analyses of the effects of probiotics in relieving IBS symptoms were calculated using a random-effects model. Further subgroup analyses were performed by different genera, doses and duration of treatment.Results. Our final analysis included 52 trials involving 6289 IBS patients. Probiotics significantly increased the overall response rate (RR:1.64; P<0.00001), subjective relief rate (RR:1.50; P=0.0002) and abdominal pain relief rate (RR:1.69; P<0.00001). As for specific genera, mixed probiotics (RR:1.41; P=0.0001), Bifidobacterium (RR:1.76; P<0.00001), Lactobacillus (RR:1.97; P=0.0004) and Saccharomyces (RR:1.31; P=0.0004) markedly relieved IBS symptoms. Mixed probiotics (RR:1.31; P=0.005), Lactobacillus (RR:2.22; P=0.04) and Bifidobacterium (RR:1.62; P<0.0001) elevated patients' subjective relief rate. Besides, probiotics effectively relieved the abdominal pain in IBS patients (RR:1.69; P<0.00001). Probiotics appeared to show a remarkable beneficial role at a dose of 109 c.f.u./day or above (RR:1.662; P<0.0001) and started to work at 4 weeks (RR 1.72; P<0.00001). Efficacy of prebiotics and synbiotics in IBS remained uncertain, due to the deficiency of available RCTs.Conclusions. Probiotics have a therapeutic role in IBS. However, the effect of different probiotics varies. The minimal effective dose of probiotics may be 109 c.f.u./day. With appropriate probiotic formula, the therapeutic effect can occur at 4 weeks. These data provide a basis for further research on the optimal probiotic therapy in IBS.

Коморбидность в гинекологии: в фокусе – предменструальный синдром и синдром раздраженного кишечника

According to various sources, from 50 to 80% of women of reproductive age note certain premenstrual symptoms. According to the results of a recent epidemiological study, the prevalence of premenstrual syndrome (PMS) in the Russian Federation is 95%. The prevalence of irritable bowel syndrome (IBS) is 15–20%, while 2/3 of people experiencing IBS symptoms do not go to the doctor ("iceberg phenomenon"). As part of clinical practice, we noted that quite often in patients with functional gastrointestinal disorders, primarily with IBS, a certain worsening of clinical symp-toms coincided in time with the luteal phase of the menstrual cycle. We reviewed the literature in information databases regarding the possible relationship between functional gastrointestinal disorders and PMS. The similarity of the etiology and pathogenesis of IBS and PMS was noted. The presence of a possible comorbidity of IBS and PMS is evidenced by the results of a number of studies and reviews devoted to the study of this relationship, which determines the need for cooperation between gynecologists and gastroenterologists/internists in the management of women with PMS and IBS, and also determines the feasibility of additional studies of the relationship between these two disorders.

Fecal Microbiota Transplantation in Irritable Bowel Syndrome: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.

Irritable bowel syndrome (IBS) poses a significant challenge due to its poorly understood pathogenesis, substantial morbidity, and often inadequate treatment outcomes. The role of fecal microbiota transplantation (FMT) in managing IBS symptoms remains inconclusive. This systematic review and meta-analysis aimed to ascertain the effectiveness of FMT in relieving symptoms in IBS patients. A thorough search was executed on PubMed/Medline and Embase databases until 14 June 2023, including all studies on FMT use in IBS patients. We examined the efficiency of FMT in reducing patients' symptoms overall and in particular subgroups, classified by placebo preparation, FMT preparation, frequency, and route of administration. Among 1015 identified studies, seven met the inclusion criteria for the meta-analysis. The overall symptomatology of FMT-treated IBS patients did not significantly differ from the control group (Odds Ratio (OR) = 0.99, 95% Confidence Interval (CI) 0.39-2.5). Multiple doses of FMT compared with non-FMT placebo, or single-donor FMT therapy compared with autologous FMT placebo also showed no significant benefit (OR = 0.32, 95%CI (0.07-1.32), p = 0.11, and OR = 1.67, 95%CI (0.59-4.67), p = 0.32, respectively). However, a single dose of multiple-donor FMT administered via colonoscopy (lower gastrointestinal (GI) administration) significantly improved patient symptoms compared with autologous FMT placebo (OR = 2.54, 95%CI (1.20-5.37), p = 0.01, and OR = 2.2, 95%CI (1.20-4.03), p = 0.01, respectively). The studies included in the analysis showed a low risk of bias and no publication bias. In conclusion, lower GI administration of a single dose of multiple-donor FMT significantly alleviates patient complaints compared with the autologous FMT used as a placebo. The underlying mechanisms need to be better understood, and further experimental studies are desired to fill the current gaps.

The Low-FODMAP Diet, IBS, and BCFAs: Exploring the Positive, Negative, and Less Desirable Aspects-A Literature Review.

The literature about the association of branched short-chain fatty acids (BCFAs) and irritable bowel syndrome (IBS) is limited. BCFAs, the bacterial products of the catabolism of branched-chain amino acids, are proposed as markers for colonic protein fermentation. IBS is a gastrointestinal disorder characterized by low-grade inflammation and intestinal dysbiosis. The low-FODMAP diet (LFD) has increasingly been applied as first-line therapy for managing IBS symptoms, although it decreases the production of short-chain fatty acids (SCFA), well known for their anti-inflammatory action. In parallel, high protein consumption increases BCFAs. Protein fermentation alters the colonic microbiome through nitrogenous metabolites production, known for their detrimental effects on the intestinal barrier promoting inflammation. Purpose: This review aims to explore the role of BCFAs on gut inflammation in patients with IBS and the impact of LFD in BCFAs production. Methods: A literature search was carried out using a combination of terms in scientific databases. Results: The included studies have contradictory findings about how BCFAs affect the intestinal health of IBS patients. Conclusions: Although evidence suggests that BCFAs may play a protective role in gut inflammation, other metabolites of protein fermentation are associated with gut inflammation. Further research is needed in order to clarify how diet protein composition and, consequently, the BCFAs are implicated in IBS pathogenesis or in symptoms management with LFD+.

Poor Subjective Sleep Quality Predicts Symptoms in Irritable Bowel Syndrome Using the Experience Sampling Method.

Sleep quality may affect symptom experience in irritable bowel syndrome (IBS). Our aim was to investigate the relationship between sleep quality and gastrointestinal (GI) symptoms using actigraphy and the experience sampling method. Patients with IBS were recruited from a tertiary Neurogastroenterology clinic and the community. GI symptoms and mood were recorded on a smartphone application, 10 times per day, over 7 consecutive days. Subjective sleep quality was recorded every morning to reflect the night before. Objective measures of sleep quality were estimated from wrist-worn actigraphy. Cross-lagged structural equation models were built to assess the directionality of sleep-symptom relationships over time. Eighty patients with IBS completed the study (mean age: 37 years [range 20-68], 89% female, 78% community). Approximately 66% had a Pittsburgh Sleep Quality Index score ≥ 8, indicating a clinically significant sleep disturbance. Approximately 82% (95% CI: 72-90) screened positive for a sleep disorder, most commonly insomnia. In cross-lagged analysis, poor subjective sleep quality predicted next-day abdominal pain (0.036 < P < 0.040) and lower GI symptoms (0.030 < P < 0.032), but not vice versa. No significant relationship with GI symptoms was found for any objective sleep measure using actigraphy. Poor subjective sleep quality was associated with higher next-day lower GI symptom levels, but not vice versa. Objective sleep measures did not predict next-day abdominal symptoms, potentially supporting the conclusion that it is the perception of sleep quality that is most influential. This study may be used to guide future research into the effect of sleep interventions on GI symptoms.

Cognitive function in patients with irritable bowel syndrome: impairment is common and only weakly correlated with depression/anxiety and severity of gastrointestinal symptoms

Objective To investigate cognitive function in patients with irritable bowel syndrome (IBS) and its relation to anxiety/depression and severity of gastrointestinal (GI) symptoms. Methods Patients with IBS (n = 65) and healthy controls (HCs, n = 37) performed the ten subtests of the Repeatable Battery for the Assessment of Neuropsychological Status (RBANS). Age-normed index scores of five cognitive domains (Immediate memory, Visuospatial function, Language function, Attention, Recall) and a total (Fullscale) score were derived from the performance. Emotional function was assessed using the Hospital Anxiety and Depression Scale (HADS), and the IBS Symptom Scoring System (IBS-SSS) was used to define the severity of GI symptoms. Results Patients with IBS reported significantly higher scores than the HC group on symptom measures of anxiety and depression, and significantly lower scores on the Immediate memory, Recall, and Fullscale RBANS indexes. Approximately 30% of the IBS patients obtained index scores at least one standard deviation below the population mean, and more than 50% scored above the screening threshold for an anxiety disorder. The severity of GI symptoms was significantly correlated with the severity level of anxiety symptoms (p=.006), but neither the severity level of emotional nor GI symptoms was significantly correlated with the RBANS index scores in the IBS group. Conclusion Cognitive and emotional function were more severely affected in patients with IBS than in HCs. The weak correlation between the two functional areas suggests that both should be assessed as part of a clinical examination of patients with IBS.

The Impact of Type 2 Diabetes Mellitus on Treatment Success in IBS Patients

Aim: This study aimed to investigate the impact of type 2 diabetes mellitus (T2DM) on treatment outcomes in patients diagnosed with irritable bowel syndrome (IBS) according to the Rome IV criteria. Materials and Methods: A prospective, observational cohort study was conducted at a gastroenterology clinic between March 2023 and July 2023. Participants included adults diagnosed with IBS based on Rome IV criteria. Patients with significant gastrointestinal disorders, psychiatric conditions, or contraindications to IBS treatment were excluded. Clinical assessments, including Visual Analog Scale (VAS), Bristol Stool Chart, IBS Symptom Severity Score (IBS-SSS), and IBS Quality of Life (IBS-QoL) scores, were conducted before and after treatment. Results: Of the 363 included patients, 174 had T2DM, and 189 did not. T2DM-positive patients were older, had higher BMI and HbA1c levels. The DM-negative group showed significantly better treatment responses in all clinical scores (VAS, Bristol Stool, IBS-SSS, and IBS-QoL) after treatment. While there was no initial difference in clinical scores, posttreatment scores showed a significant disparity between the two groups. Conclusion: This study highlights the complex interplay between T2DM and IBS, emphasizing the need for a comprehensive approach to patient care. It suggests that exocrine pancreatic insufficiency (EPI) may mimic IBS symptoms in T2DM patients, calling for a reconsideration of diagnosis and treatment strategies. These findings underscore the importance of looking beyond surface-level diagnoses and considering comorbidities, leading to improved healthcare for all. Further research with larger and more diverse samples is warranted to validate these results and explore treatment options in more detail.

Digesting the Impact of Diet on Irritable Bowel Syndrome (IBS): Exploring Solutions for Controlling IBS.

Irritable bowel syndrome (IBS) plagues nearly a fifth of the general population. It is a chronic illness that can significantly lower quality of life (QoL) and work productivity. The relationship between diet and the functional gastrointestinal (GI) symptoms present in IBS is gaining more and more attention. In addition to being a factor in the pathophysiology of IBS, diet also has a significant impact on symptoms and overall well-being. Recent research has also shown that short-chain fermentable carbohydrates increase colonic gas production and small intestine water volume, which in turn causes functional GI symptoms in those with visceral hypersensitivity.This review article has consolidated various studies highlighting the association between certain foods and the pathophysiology of IBS. It has also talked about how restricting certain food items from the diet of affected individuals can relieve symptoms and in some cases can be more effective than pharmacotherapy. Although the low reduced fermentable oligosaccharide, disaccharide, monosaccharide, and polyol (FODMAP) diet (LFD) is a well-known method of treating IBS symptoms, over a third of individuals do not benefit from it. This article has also discussed the effectiveness and applicability of the LFD compared to other dietary therapies for the long-term management of IBS.

The Potential Relationship between Gastric and Small Intestinal-Derived Endotoxin on Serum Testosterone in Men

The association between H. pylori and small intestinal permeability (IP) on serum testosterone levels in men as mediated by metabolic endotoxemia remains unclear. We sought to explore relationships using correlational analysis between H. pylori IgG class antibody levels and small IP via dual sugar probe analysis on T levels in 50 male participants of reproductive age. Sleep quality, physical activity levels, and Irritable Bowel Syndrome (IBS) symptom severity were measured as potential confounders. Measures for H. pylori (antibodies) increased small IP (lactulose/rhamnose ratio), and hypogonadism (testosterone) did not exceed diagnostic cut-off values for respective pathologies. There was no correlation between lactulose/rhamnose e ratio and GI function markers, zonulin, H. pylori, and IBS questionnaire scores; inflammatory markers, high-sensitivity C-reactive Protein (hsCRP) and Lipopolysaccharide-Binding Protein (LBP); nor endocrine markers, testosterone, Luteinizing hormone (LH), and Follicle-stimulating hormone (FSH). There was a moderate inverse relationship revealed between IBS symptom severity and LBP (r = −0.457, p = 0.004); and hsCRP and testosterone (r = −0.398, p = 0.004). This was independent of physical activity level and sleep quality, but not BMI, which supports the existing link between adiposity, inflammation, and hypogonadism currently present in the literature.

An 8-Week Course of Bifidobacterium longum 35624® Is Associated with a Reduction in the Symptoms of Irritable Bowel Syndrome.

Irritable bowel syndrome (IBS) is one of the disorders most frequently diagnosed by gastroenterologists. Probiotics are promising tools for the management of IBS. The objective of the present study was to evaluate the effectiveness and tolerability of a probiotic (Bifidobacterium longum 35624®) in adults (aged 18 or over) with IBS (as defined by the Rome IV criteria). In an open-label, observational, post-market study conducted in Germany, adults with IBS and a prior recommendation for the intake of B. longum 35624® were recruited by family physicians. During the 8-week course of treatment, the study participants filled out a weekly questionnaire that enabled calculation of a total IBS symptom score (TISS, the sum of abdominal pain, bloating, passage of gas, constipation, and diarrhea individual symptom scores) and the well-known IBS severity scoring system (IBS-SSS) score. Thirty-seven patients were included. The course of B. longum 35624® was associated with a significant reduction (43.4%) in the TISS vs. baseline. The mean individual symptom grades for passage of gas and bloating fell significantly from "moderate" at baseline to "very mild to mild" after 8 weeks of treatment, whereas those for abdominal pain and diarrhea fell significantly from "mild to moderate" to "very mild to mild." Over 60% of the participants achieved clinically meaningful reductions in the TISS (> 30%) and the IBS-SSS score (> 50 points). The effectiveness of B. longum 35624® was rated as "good to satisfactory" by study participants and the investigating physicians. One mild adverse event (nausea) was potentially linked to the study treatment. We conclude that an 8-week course of B. longum 35624® was associated with significant, clinically meaningful symptom relief in a typical population of adult patients with IBS.