Functional dyspepsia (FD) is a prevalent chronic digestive disorder that significantly impacts patients\' quality of life. Sleep disturbance (SD) is common among FD patients, yet the relationship between SD and FD remains poorly characterized. This systematic review explores the bidirectional relationship between FD and SD, investigating underlying mechanisms and implications for management. A rigorous and comprehensive systematic search was conducted across PubMed, PubMed Central (PMC), Google Scholar, Cochrane Library, and ScienceDirect using select keywords related to SD and FD. Only studies published in English from the past 10 years that met inclusion and exclusion criteria were included. Quality assessment tools specific to study types were employed to minimize bias. After applying inclusion and exclusion criteria and quality assessments, the review encompassed 30 studies. The key findings reveal that FD is frequently associated with SD, with a significant proportion of FD patients reporting poor sleep quality. The mechanisms linking SD and FD are complex, involving the circadian rhythm, visceral hypersensitivity, immune responses, and psychological factors. Nonpharmacological treatments like cognitive behavioral therapy (CBT), acupuncture, and pharmacological neuromodulators have shown promise in managing FD and SD, offering hope for improved patient outcomes. SD and FD share a significant bidirectional relationship, influenced by a complex interplay of physiological, psychological, and lifestyle factors. Addressing SD in FD patients may improve overall symptom management. Further research is crucial, as it should focus on isolating specific SD causes and their direct impacts on FD and other functional gastrointestinal disorders (FGIDs), opening up new avenues for understanding and treatment.

Functional dyspepsia is a common functional gastrointestinal disorder that is often challenging to treat. Psychotherapeutic interventions have been proposed as an alternative or adjunctive approach to conventional treatments, but their efficacy remains unclear.
This systematic review and meta-analysis aimed to evaluate the efficacy of psychotherapeutic interventions in the treatment of functional dyspepsia.
A comprehensive search of electronic databases was conducted, from inception to March 2023, for randomized controlled trials (RCTs) that evaluated the effects of psychotherapeutic interventions on patients with functional dyspepsia. The primary outcome measures were gastrointestinal symptoms, quality of life, depression, and anxiety. Data were extracted and analyzed using Review Manager 5.3 software. The risk of bias of the included studies was assessed using the Cochrane Risk of Bias tool.
Sixteen RCTs comprising 1550 patients with functional dyspepsia were included in the meta-analysis. The types of psychotherapeutic interventions used in the included studies were cognitive-behavioral therapy (CBT), hypnotherapy, and mindfulness-based stress reduction (MBSR). The control groups were usual care, placebo, supportive therapy, or no treatment. The meta-analysis showed that psychotherapeutic interventions had a significant effect on reducing gastrointestinal symptoms,depression and anxiety in patients with functional dyspepsia. However, no significant improvement was observed in the quality-of-life scores of patients who received psychotherapeutic interventions compared to those in the control group.
Psychotherapeutic interventions, such as CBT, hypnotherapy, and MBSR, could be a useful adjunct to conventional treatments for functional dyspepsia, as they were found to significantly reduce gastrointestinal symptoms and anxiety in patients. However, further studies are needed to assess the long-term effects and generalizability of these interventions.

The goal of this comprehensive review was to verify if the prevalence of Helicobacter pylori (Hp) bacteria in patients with dyspepsia is higher in the oral cavity of periodontal or non-periodontal patients. The bibliographic search was conducted on scientific studies published in PubMed, Cochrane Library, SciELO, and BVS. The focus question was: \"In patients with dyspepsia and periodontitis, is the prevalence of Hp bacteria in the oral cavity higher than in patients with only dyspepsia or without any disease?\" The inclusion criteria were human studies in English, Portuguese, or Spanish languages, published between 2000 and 2022, that included patients over the age of 18 and aimed to evaluate the presence of Hp bacteria in the oral cavity and in the protective mucosal layer of the gastric lining of patients with the diseases (periodontitis and dyspepsia) or without disease; clinical trials, randomized controlled clinical trials, comparative studies, case-control studies, cross-sectional studies, and cohort studies. The methodological quality evaluation of the included articles was performed using the Joanna Briggs Institute tools. The final scores could be of \"Low\" quality (at least two \"no\" [red] or ≥ five \"unclear\" found), \"Moderate\" quality (one \"no\" [red] was found or up to four \"unclear\" criteria were met), or \"High\" quality (all green [yes] or at maximum two \"unclear\"). Of 155 potentially eligible articles, 10 were included in this comprehensive review after the application of the eligibility criteria. The selected studies were scrutinized regarding the relationship between Hp colonization in the oral cavity and stomach, its impact on severity and complications of gastric infection, as well as the effect of the presence of oral and gastric Hp on dental and systemic parameters. Hp can colonize periodontal pockets regardless of its presence in the stomach. There was a higher prevalence of oral biofilm in dyspeptic patients with periodontal disease, and worse control of bleeding and low oral hygiene was observed in periodontal compared to non-periodontal patients. For que quality assessment, the scientific studies included presented low to moderate methodological quality. Conclusions: It is possible to conclude that Hp is a bacterium that can colonize dental plaque independently of the stomach and vice versa; however, when both diseases are found, its presence may be more significant. Supra and subgingival dental plaque may be a reservoir of Hp, suggesting that patients with gastric infections are more likely to have Hp in the oral cavity. The results must be carefully analyzed due to the limitations present in this review.

OBJECTIVE: Disorders of gut-brain interaction may arise after acute gastroenteritis. Data on the influence of pathogen type on the risk of postinfection IBS (PI-IBS), as on postinfection functional dyspepsia (PI-FD), are limited. We conducted a systematic review and meta-analysis to determine prevalence of PI-IBS or PI-FD after acute gastroenteritis.
METHODS: We included observational studies recruiting ≥50 adults and reporting prevalence of IBS or FD after acute gastroenteritis with ≥3-month follow-up. A random effects model was used to estimate prevalence and ORs with 95% CIs.
RESULTS: In total, 47 studies (28 170 subjects) were eligible. Overall prevalence of PI-IBS and PI-FD were 14.5% and 12.7%, respectively. IBS persisted in 39.8% of subjects in the long-term (>5 years follow-up) after diagnosis. Individuals experiencing acute gastroenteritis had a significantly higher odds of IBS (OR 4.3) and FD (OR 3.0) than non-exposed controls. PI-IBS was most associated with parasites (prevalence 30.1%), but in only two studies, followed by bacteria (18.3%) and viruses (10.7%). In available studies, Campylobacter was associated with the highest PI-IBS prevalence (20.7%) whereas Proteobacteria and SARS-CoV-2 yielded the highest odds for PI-IBS (both OR 5.4). Prevalence of PI-FD was 10.0% for SARS-CoV-2 and 13.6% for bacteria (Enterobacteriaceae 19.4%).
CONCLUSIONS: In a large systematic review and meta-analysis, 14.5% of individuals experiencing acute gastroenteritis developed PI-IBS and 12.7% PI-FD, with greater than fourfold increased odds for IBS and threefold for FD. Proinflammatory microbes, including Proteobacteria and subcategories, and SARS-CoV-2, may be associated with the development of PI-IBS and PI-FD.

OBJECTIVE: To determine the prevalence and associations between anxiety/depression, and gastrointestinal (GI) symptoms across gastroparesis and functional dyspepsia.
METHODS: Twenty adult studies were identified through systematic searches of three databases (PubMed, CINAHL and PsycINFO) in September 2023. Meta-analysis was performed to estimate the pooled prevalence rates of anxiety and depression across gastroparesis and functional dyspepsia, and to determine whether the associations of anxiety/depression and gastrointestinal (GI) symptoms differ in gastroparesis versus functional dyspepsia.
RESULTS: The overall pooled prevalence rate for anxiety was similar (χ2(1) = 2.45, p = .12) in gastroparesis (49%) and functional dyspepsia (29%). The overall pooled prevalence rate for depression in gastroparesis (39%), and functional dyspepsia (32%) was also similar (χ2(1) = 0.81, p = .37). No significant relationship between anxiety and GI symptoms (r = 0.11) or depression and GI symptoms (r = 0.16) was found in gastroparesis, whilst significant, though weak, positive relationships between anxiety and GI symptoms (r = 0.30) and depression and GI symptoms (r = 0.32) were found in functional dyspepsia. The association between GI symptoms and anxiety, but not depression, across gastroparesis and functional dyspepsia was found to be significant (χ2(1) = 5.22, p = .02).
CONCLUSIONS: Contributing to ongoing debate as to whether gastroparesis and functional dyspepsia are interchangeable syndromes, this review found that anxiety and depression prevalence was similar in both conditions. Psychological assessment and the utilisation of effective and holistic care in both conditions is therefore warranted.

BACKGROUND: For centuries, spring and other natural waters have been recommended as external or internal remedies for numerous diseases. For studies that examined the effects of drinking mineral waters against heartburn, gastroesophageal reflux disease (GERD), or functional dyspepsia, a systematic review is lacking.
OBJECTIVE: The main aim of this systematic review was to examine the effects of drinking natural mineral waters on heartburn from various causes by identifying all published intervention studies and critically appraising their methods as well as summarizing their results.
METHODS: We systematically searched the largest medical literature database MEDLINE, further relevant web sources, and gray literature for randomized and nonrandomized trials, with or without control groups, up to September 2021 and no language restrictions. Further inclusion criteria were adult patients with heartburn, drinking cure with natural mineral water as the intervention, compared to no or other interventions (care-as-usual, waiting list). We defined the reduction of heartburn symptoms and duration of disease episodes as primary and quality of life as secondary outcomes. Two reviewers independently carried out the study quality assessments (risk of bias) using the National Institutes of Health-Study Quality Assessment Tools.
RESULTS: Nine trials comprising 393 patients from Italy, Russia, Ukraine, and Germany fulfilled all inclusion criteria. We identified three randomized controlled trials (all with poor methodological quality), plus six before-after (pre/post) intervention studies without a control group. The intervention groups of the three comparative trials seemed to show a stronger reduction of self-reported heartburn symptoms, and duration of heartburn episodes than the respective control groups; however, they all had poor methodological quality.
CONCLUSIONS: Based on the best available evidence of clinical studies, we cannot recommend or advise against drinking natural mineral waters as a treatment for heartburn. The potential benefits of natural mineral waters that were reported in some studies with a lower evidence level (e.g., lacking a control group) should be verified by good quality randomized clinical trials with adequate comparison groups and longer follow-up periods.
Seit Jahrhunderten werden Quell- und andere natürliche Wässer als äußerliche oder innerliche Heilmittel für zahlreiche Krankheiten empfohlen. Für Studien, die die Wirkung des Trinkens von Mineralwasser gegen Sodbrennen, gastroösophageale Refluxkrankheit (GERD) oder funktionelle Dyspepsie untersuchten, fehlt eine systematische Übersicht.Das Hauptziel dieser systematischen Übersichtsarbeit war es, die Auswirkungen von Trinkkuren mit natürlichen Mineralwässern auf Sodbrennen verschiedener Ursachen zu untersuchen, indem alle veröffentlichten Interventionsstudien identifiziert und ihre Methoden kritisch bewertet sowie ihre Ergebnisse zusammengefasst wurden.Wir durchsuchten systematisch die größte medizinische Literaturdatenbank MEDLINE, weitere relevante Internetquellen und graue Literatur nach randomisierten und nicht-randomisierten Studien, mit oder ohne Kontrollgruppen, bis September 2021 und ohne sprachliche Einschränkungen. Weitere Einschlusskriterien waren erwachsene Patienten mit Sodbrennen, Trinkkur mit natürlichem Mineralwasser als Intervention, im Vergleich zu keiner oder anderen Interventionen (care-as-usual, Warteliste). Wir definierten die Abnahme der Symptome des Sodbrennens und die Dauer der Krankheitsepisoden als primäre und die Lebensqualität als sekundäre Endpunkte. Zwei Gutachter bewerteten unabhängig voneinander die Qualität der Studien (Verzerrungsrisiko) anhand der National Institutes of Health-Study Quality Assessment Tools.Neun Studien mit 393 Patienten aus Italien, Russland, der Ukraine und Deutschland erfüllten alle Einschlusskriterien. Wir identifizierten drei randomisierte kontrollierte Studien (alle mit schlechter methodischer Qualität) sowie sechs Vorher-Nachher-Studien (Prä-/Post-Studien) ohne Kontrollgruppe. Die Interventionsgruppen der drei randomisierten Vergleichsstudien schienen eine stärkere Verringerung der selbstberichteten Symptome und der Dauer der Episoden des Sodbrennens zu zeigen als die jeweiligen Kontrollgruppen, allerdings waren sie alle von schlechter methodischer Qualität.Auf der Grundlage der besten verfügbaren Belege aus klinischen Studien können wir das Trinken natürlicher Mineralwässer zur Behandlung von Sodbrennen weder empfehlen noch davon abraten. Die potenziellen Vorteile natürlicher Mineralwässer, die in einigen Studien mit geringerer Evidenz (z. B. ohne Kontrollgruppe) berichtet wurden, sollten durch qualitativ hochwertige randomisierte klinische Studien mit angemessenen Vergleichsgruppen und längeren Nachbeobachtungszeiträumen überprüft werden.

OBJECTIVE: To assess the effectiveness of acupuncture for treating depression and anxiety in patients diagnosed with functional dyspepsia (FD).
METHODS: PubMed, Embase, Cochrane Library, Web of Science, CNKI, Wanfang Data, Sinomed, and VIP Database were searched until April 30, 2023 for Randomized Controlled Trials (RCTs) comparing acupuncture to placebo or drugs for symptom alleviation. Two independent reviewers conducted the study search, data extraction, and bias risk assessment using the Cochrane Risk of Bias tool. Mean difference (MD), risk ratio (RR), and corresponding 95% confidence intervals (CI) were computed. Subgroup and sensitivity analyses were also performed. The Grading of Recommendations Assessment, Development, and Evaluation (GRADE) system was employed to evaluate the evidence level.
RESULTS: A total of 16 RCTs involving 1315 participants were included. Acupuncture demonstrated marked superiority over placebo (MD = -7.07, 95%CI: -11.03 to -3.10, very low quality evidence) in mitigating Self-Rating Anxiety Scale (SAS) scores and was found to be more effective in reducing Self-Rating Depression Scale (SDS) scores than either placebo (MD = -4.63, 95%CI: -6.28 to -2.98, low quality evidence) or first-line drugs (MD = -2.71, 95%CI: -5.19 to -0.23, very low quality evidence). In terms of attenuating Hamilton Anxiety Rating Scale (HAMA) and Hamilton Depression Rating Scale (HAMD) scores, acupuncture consistently outperformed both placebo (HAMA: MD = -2.58, 95%CI: -4.33 to -0.83, very low quality evidence; HAMD: MD = -1.89, 95%CI: -3.11 to -0.67, low quality evidence) and first-line drugs (HAMA: MD = -5.76, 95%CI: -10.18 to -1.35, very low quality evidence; HAMD: MD = -5.59, 95%CI: -7.59 to -3.59, very low quality evidence). However, no significant difference was observed between acupuncture and placebo in terms of improvement in Hospital Anxiety and Depression Scale (HADS) scores.
CONCLUSIONS: Based on current clinical evidence, acupuncture might have a positive effect on depression and anxiety in patients with FD. Further large-sample, multi-center, high-quality RCTs validation are required, as the conclusion is limited by the quantity and quality of the included studies.

Although functional dyspepsia (FD) is a common functional gastroduodenal disorder with a high socioeconomic burden, little is known about its global prevalence. Thus, we performed a comprehensive study to estimate long-term trends in the prevalence of FD. We searched PubMed/MEDLINE, Embase, and Google Scholar from 1990 to 2022 for population-based studies that reported the prevalence of FD in adults (≥ 18 years old) according to Rome I, II, III, or IV criteria. The prevalence of FD was extracted from included studies to obtain pooled prevalence with 95% confidence intervals (CI) and 95% prediction intervals. Subgroup analysis was performed according to certain characteristics, including geographic region. A total of 44 studies met the eligibility criteria, including 256,915 participants from 40 countries across six continents. The overall global pooled prevalence of FD was 8.4% (95% CI 7.4-.9.5). The prevalence was the highest in Rome I (11.9%; 95% CI 5.1-25.4) and lowest in Rome IV (6.8%; 95% CI 5.8-7.9). Developing countries showed a higher prevalence than developed countries (9.1% versus 8.0%), and prevalence was higher in women, irrespective of the definition used (9.0% versus 7.0%). The pooled prevalence gradually decreased from 1990 to 2020 (12.4% [8.2-18.3] in 1990-2002 versus 7.3% [6.1-8.7] in 2013-2020). The prevalence of FD differs by country, economic status, geographical region, and sex, and the global prevalence has been gradually declining. Despite the heterogeneity of sample population, our study estimates the current global burden of FD and provides information to heath care policy decisions.

Acotiamide is a prokinetic with a novel mechanism of action - an antagonist of muscarinic M1 and M2 receptors and an acetylcholinesterase inhibitor. Acetylcholine is the central mediator of the tone of the muscular components of the gastrointestinal tract, increasing its motor activity. Blockade of presynaptic M1 and M2 receptors neutralizes the inhibitory effect of the feedback mechanism on the acetylcholine synthesis, while inhibition of acetylcholinesterase in the synaptic cleft reduces the acetylcholine degradation. Currently, the clinical efficacy of acotiamide in the population of patients with functional dyspepsia is demonstrated in more than 10 clinical studies in different regions of the world, demonstrating a reduction of the symptoms of the disease during treatment with this agent and an improvement in the quality of life of patients. In addition, the combination of acotiamide with proton pump inhibitors optimizes the management of patients with gastroesophageal reflux disease.
Акотиамид является прокинетиком принципиально нового механизма действия – антагонист мускариновых М1- и М2-рецепторов, а также ингибитор ацетилхолинэстеразы. Блокада М1- и М2-рецепторов на пресинаптической мембране нивелирует тормозное влияние по механизму обратной отрицательной связи на синтез ацетилхолина, тогда как ингибирование ацетилхолинэстеразы в синаптической щели снижает распад данного нейротрансмиттера, который представляет собой основной медиатор тонуса мышечных компонентов желудочно-кишечного тракта, увеличивая его моторную активность. В настоящее время клиническая эффективность молекулы акотиамида на популяции пациентов с функциональной диспепсией показана более чем в 10 клинических исследованиях из разных регионов мира, демонстрирующих регресс симптоматики заболевания на фоне применения данного прокинетика и улучшение качества жизни пациентов. Помимо этого комбинация акотиамида с ингибиторами протонной помпы позволяет оптимизировать тактику ведения пациентов с симптомами гастроэзофагеальной рефлюксной болезни.

Functional dyspepsia (FD) is a common upper gastrointestinal disorder, characterized by bothersome epigastric pain or burning, fullness after meals or early satiety. The precise pathophysiology remains incompletely understood but may include the role of disordered gut-brain communication leading to disturbances in gastro-duodenal physiological functioning. Even if there are several pharmacological treatment options, it is a chronic and relapsing disorder with persistent symptoms that makes its management difficult. Yoga is a fast-spreading complementary and alternative medicine (CAM) specialty, that has gained attention in the medical field for its ability to address the physical, emotional, mental and social aspects of health and disease. Various other CAM therapies are being used for FD with varying efficacy. However, apart from one research study that used yoga therapy on abdominal pain related functional gastrointestinal disorders in children which included a few FD cases as well (11.6%), no other study using yoga therapy has been done in FD as per our best knowledge. Therefore, in the present review, we have summarized the current scientific understanding of the probable effects of yoga on the pathophysiological mechanisms involved in FD (gastric motility, fundic accommodation, hypersensitivity, duodenal inflammation, psychological distress and gut-brain dysfunction). The literature suggests yoga can have a beneficial role in the management of FD. However, rigorous research and clinical trials are required to confirm the same.