Gastrointest. Disord., Volume 7, Issue 2 (June 2025) – 8 articles

Gastroesophageal reflux disease (GERD) is a common chronic gastrointestinal disorder that greatly influences patients’ quality of life and represents a growing public health concern. Characterized by typical and atypical symptoms, GERD encompasses a range of clinical phenotypes and is associated with complications such as erosive esophagitis and Barrett’s esophagus. This review intends to provide a thorough overview of current scientific knowledge on the etiological factors, risk determinants, and pathophysiology of GERD, while exploring diagnostic challenges and therapeutic approaches. Proton pump inhibitors (PPIs) remain the mainstay of medical therapy; however, concerns regarding their long-term safety have encouraged interest in adjunctive and alternative strategies. Emerging pharmacological agents, plant-based treatments, and integrative approaches rooted in traditional medicine offer promising modalities for enhanced management. Additionally, dietary and lifestyle modifications such as weight control, meal timing, and avoidance of trigger foods, are essential components of effective care. A multidisciplinary framework incorporating pharmacological, nutritional, and behavioral strategies is emphasized as the most reliable path toward personalized and sustainable GERD management. This review further aims to synthesize current therapeutic modalities and evolving perspectives in the treatment of GERD. Full article

Background: The relationship between gut microbiota and metabolic health has garnered significant attention in recent years. In this study, we aim to explore the intricate link between gut microbiota and metabolic outcomes, with a focus on lifestyle factors such as smoking, diet, and living environment. Materials and Methods: We investigated the gut microbiota and metabolic profiles of adult patients with type 2 diabetes, all receiving metformin therapy, to assess how lifestyle factors impact metabolic health. Key metabolic parameters and body composition indices were measured, alongside gut microbiota composition. Results: Our cohort included 30 patients, and we identified significant associations between smoking and adverse body composition changes, as well as dietary patterns favoring plant-based foods correlating with improved metabolic outcomes. Urban participants displayed distinct microbiota profiles and metabolic markers compared to their rural counterparts, highlighting the potential influence of environmental factors. Conclusions: The current data does not directly demonstrate a causal link between metformin usage and specific changes in gut microbiota composition. These findings align with the existing literature while providing novel insights into specific population dynamics. Future research should focus on longitudinal studies and interventions targeting the gut microbiota to further unravel its therapeutic potential. Full article

Background/Objectives: This study aimed to identify molecular variants associated with the progression of gastric precancerous lesions in a follow-up study conducted on patients from Southwestern Colombia. Methods: Whole-exome sequencing (WES) was performed on patients enrolled in the Colombian chemoprevention trial, who were classified into two groups—progression and regression—based on changes in the severity of their gastric precancerous lesions over 16 years of follow-up. The bioinformatics pipeline included steps for quality control, mapping, variant calling, filtering, and annotation. Associations between molecular variants and lesion progression were analyzed using Fisher’s exact test and the Cochran–Armitage trend test. Additionally, functional impact and pathway enrichment analyses were performed for variants that showed significant associations. Results: Thirty-eight molecular variants from thirty-seven participants were associated with the progression of gastric precancerous lesions. These variants were found in tumor suppressor genes like CDKN2A and CDK4, which are involved in cell cycle regulation and apoptosis. Additionally, variants were identified in extracellular matrix regulators such as COL23A1, LAMA2, and TNR. Other noteworthy findings included variants in FLT1, which is linked to VEGF signaling in angiogenesis, and APOB, which is involved in modulating inflammatory responses. Furthermore, alterations in genes associated with the hemostatic system, such as FGA and F5, underscored the connection between hemostasis and carcinogenesis. Conclusions: This exploratory analysis highlighted some molecular variants that may affect the function, structure, and expression of key proteins involved in cancer development, contributing to the progression of gastric precancerous lesions. Full article

Background: The increasing availability of gastrointestinal (GI) interventions has raised the need to treat luminal defects. Endoscopic suturing (ES) is a minimally invasive technique that is used for a wide range of indications. This retrospective cohort study aimed to evaluate the performance of ES in treating upper GI defects. Materials and Methods: Data from a tertiary centre were collected for patients undergoing ES to treat upper GI defects. The primary outcome was long-term outcomes, defined as the successful sutures deployment. Secondary outcomes included technical success, immediate clinical success (confirmation of closure at the time of the procedure), recurrence, and complications. Descriptive statistics and x² test were used to calculate the rates of the outcomes and assess any link between independent variables and results. Results: Forty-two procedures were performed on 25 patients between 2018 and 2023. The mean age was 55 (±16.2) years, and 56% were female. The long-term clinical success rate was 69.6% (16/23), the technical success rate was 88.1% (37/42), and the immediate clinical success rate was 91.9% (34/37), with only two (4.8%) adverse events. The overall recurrence rate was 61.8% (21/34). Technical success was higher in the esophagus (92.3%), and stomach (100%) (p = 0.002), and immediate clinical success was more likely in patients with leaks (88.9%) or fistula (95.2%) compared to perforation (50%; p = 0.005). Conclusions: ES demonstrated high rates of technical and immediate clinical success for defect closure in the upper GI tract, with low rates of complications. The benefit is most prominently seen among patients with leaks and fistulas in the stomach and esophagus. Full article

Microbiome dysbiosis—an imbalance in gut microbial communities—has emerged as a critical factor in the pathogenesis of neurological disorders, particularly Alzheimer’s and Parkinson’s diseases. This review examines the role of gut microbiota in neurodegeneration, emphasizing how dysbiosis disrupts gut–brain communication through mechanisms such as impaired gut permeability, systemic inflammation, and neuroinflammation. The gastrointestinal and central nervous systems interact bidirectionally, with microbial metabolites like short-chain fatty acids playing a pivotal role in maintaining gut and brain health. Dysbiotic shifts in microbial composition can compromise the blood–brain barrier, enabling inflammatory molecules to alter brain biochemistry and potentially accelerate neurodegenerative processes. Additionally, this review explores therapeutic strategies—including probiotics, prebiotics, and dietary modifications—designed to restore microbial balance, reduce neuroinflammation, and slow disease progression. Further research is essential to refine microbiome-targeted therapies and fully elucidate their potential in managing neurodegenerative diseases. Full article

Background: Single-Anastomosis Duodenoileostomy with Sleeve Gastrectomy (SADI-S) has been reported as both a safe and effective surgical procedure. However, these findings have not been directly compared to those of more established and less complex procedures, such as Sleeve Gastrectomy (SG), which remains the most commonly performed technique in Metabolic and Bariatric Surgery (MBS). Objective: This study aimed to assess and contrast the intraoperative and postoperative outcomes between patients who underwent SADI-S and those who underwent SG. Methods: A systematic review and meta-analysis were performed and registered under PROSPERO with the ID CRD42024532504. A comprehensive search strategy was executed on 15 April 2024, covering PubMed, Embase, Cochrane Library, Scopus, Web of Science, and Science Direct from the first reports to March 2024. The search strategy incorporated relevant keywords, including: “SADI-S” OR “Single Anastomosis Duodenal-Ileal bypass” and “Sleeve Gastrectomy”. We included studies comparing adult patients (≥18 years old) undergoing SADI-S and SG, reporting at least one clinical outcome of interest. Results: Five studies published between 2019 and 2023, comprising 3593 patients, were included. Of these, 461 patients (12.8%) underwent SADI-S, while 3132 (87.2%) underwent SG. The mean patient age was 42.96 years, with 89.6% female participants. Patients undergoing SADI-S had a significantly higher Body Mass Index (BMI) than those undergoing SG (Mean: 49.73 ± 8.10 vs. 45.64 ± 7.84; Mean Difference [MD]: 3.83, 95% CI: 0.52–7.14; p = 0.02) and an increased risk of hypertension (OR: 1.38, 95% CI: 1.04–1.84; p = 0.03). SADI-S also resulted in longer operative times (125.63 ± 51.91 min vs. 49.67 ± 26.07 min; MD: 65.97 min, 95% CI: 61.71–70.25; p < 0.001) and length of hospital stay (2.30 ± 2.76 days vs. 1.21 ± 0.81 days; MD: 1.03 days, 95% CI: 0.70–1.37; p < 0.001). Moreover, patients who underwent SADI-S demonstrated a significantly higher risk of postoperative complications, such as readmissions and reinterventions (OR: 3.17, 95% CI: 2.15–4.67; p < 0.001), and experienced greater excess weight loss (MD: 12.42%, 95% CI: 0.92–23.92; p = 0.03). No significant differences were observed between the groups regarding age, sex, or the prevalence of obstructive sleep apnea (OSA). Conclusions: SADI-S appears to be a promising surgical technique for facilitating substantial weight loss in individuals with severe obesity. Given the higher risk of postoperative complications associated with SADI-S, careful evaluation and personalized decision-making for patient selection and education are essential to optimize clinical and safety outcomes. Full article

Background: Colorectal cancer (CRC) remains a leading cause of cancer-related mortality worldwide. While screening tools such as the fecal immunochemical test (FIT) aid in early detection, they do not provide insights into individual risk factors or strategies for primary prevention. This study aimed to develop and internally validate an interpretable machine learning-based model that estimates an individual’s probability of developing CRC using readily available clinical and lifestyle factors. Methods: We analyzed data from 154,887 adults, aged 55–74 years, who participated in the Prostate, Lung, Colorectal, and Ovarian (PLCO) Cancer Screening Trial. A risk prediction model was built using the Light Gradient Boosting Machine (LightGBM) algorithm. To translate these findings into clinical practice, we implemented the model into a risk estimator that categorizes individuals as average, increased, or high risk, highlighting modifiable risk factors to support patient–clinician discussions on lifestyle changes. Results: The LightGBM model incorporated 12 predictive variables, with age, weight, and smoking history identified as the strongest CRC risk factors, while heart medication use appeared to have a potentially protective effect. The model achieved an area under the receiver operating characteristic curve (AUROC) of 0.726 (95% confidence interval [CI]: 0.698–0.753), correctly distinguishing high-risk from average-risk individuals 73 out of 100 times. Conclusions: Our findings suggest that this model could support clinicians and individuals considering screening by guiding informed decision making and facilitating patient–clinician discussions on CRC prevention through personalized lifestyle modifications. However, before clinical implementation, external validation is needed to ensure its reliability across diverse populations and confirm its effectiveness in real-world healthcare settings. Full article