Inflammatory bowel disease (IBD), a continuum of chronic inflammatory diseases, is tightly associated with immune system dysregulation and dysbiosis, leading to inflammation in the gastrointestinal tract (GIT) and multiple extraintestinal manifestations. The pathogenesis of IBD is not completely elucidated. However, it is associated with an increased risk of colorectal cancer (CRC), which is one of the most common gastrointestinal malignancies. In both IBD and CRC, a complex interplay occurs between the immune system and gut microbiota (GM), leading to the alteration in GM composition. Melatonin, a neuroendocrine hormone, was found to be involved with this interplay, especially since it is present in high amounts in the gut, leading to some protective effects. Actually, melatonin enhances the integrity of the intestinal mucosal barrier, regulates the immune response, alleviates inflammation, and attenuates oxidative stress. Thereby, the authors summarize the multifactorial interaction of melatonin with IBD and with CRC, focusing on new findings related to the mechanisms of action of this hormone, in addition to its documented positive outcomes on the treatment of these two pathologies and possible future perspectives to use melatonin as an adjuvant therapy.

Background: Percutaneous endoscopic lumbar discectomy (PELD) is a minimally invasive surgical technique for the treatment of lumbar disc herniation. Despite its growing popularity, limited research has explored the influence of patient characteristics and the choice of technique on post-operative outcomes and patient satisfaction. Objective: To investigate the impact of patient characteristics and surgical technique (interlaminar vs. transforaminal) on the surgical outcomes and patient satisfaction following PELD. Methods: A retrospective analysis was conducted on 177 patients who underwent PELD (53.1% males, age = 46.11 ± 14.2 years), including 147 patients with the interlaminar approach and 30 with the transforaminal approach. Demographic data, pre-operative clinical features, surgical technique, intra-operative and post-operative complications and complaints, patient-reported outcomes (disability, quality of life, satisfaction), and revision surgery rates were documented and analyzed. The mean follow-up duration was 5.55 years ± 2.73 years. Results: No significant differences were observed in demographics, pre-operative status, or post-operative complaints and complication rates between two surgical techniques, except that transforaminal technique showed a higher incidence for dural tear and persistent muscle weakness (p = 0.028 and p = 0.046, respectively). Both techniques led to excellent patient-reported outcomes with no significant differences. Total patient satisfaction with PELD was 93.8%, which correlated positively with the absence of complications and complaints and negatively with persistent back pain, recurrent herniation and revision surgery. Conclusions: Interlaminar and transforaminal PELD are both effective and safe minimally invasive surgical techniques for the treatment of lumbar disc herniation with a high patient satisfaction rate. Further prospective studies are warranted to confirm these findings.

Objective The Lebanese people have endured through several disasters, such as the Beirut explosion, coronavirus pandemic, and cholera outbreak. However, volunteers who have tried to overcome such national disasters develop emotional stress after witnessing people’s death. This study was conducted to explore whether volunteers’ depression or anxiety mediates the relationship between grief response and post-traumatic stress disorder (PTSD) symptoms.Methods We conducted an anonymous online survey study and collected responses from 270 volunteers in Lebanon from March 20–26, 2023. Demographic information and responses to the questionnaires, which included the Patient Health Questionnaire-9 (PHQ-9), Generalized Anxiety Disorder-7 (GAD-7), Post-Traumatic Stress Disorder Checklist for DSM-5 (PCL-5), Public Service Motivation scale (PSM scale), Connor-Davidson Resilience Scale-2, and Prolonged Grief Disorder (PG-13) were collected. Variables were compared between volunteers who did and did not witness people’s death. Furthermore, we explored the relationships among variables in volunteers who witnessed people’s death (n=72).Results Among 270 participants, 72 (26.67%) witnessed people’s death. The regression model demonstrated that scores for PG-13 (β= 0.31, p<0.001), PHQ-9 (β=0.21, p=0.011), and GAD-7 (β=0.44, p<0.001) were predictors of the PCL-5 score. Mediation analysis showed that grief reaction directly influenced PTSD symptoms (Z=6.19, p<0.001), whereas depression (Z=1.99, p=0.047) and anxiety (Z=2.79, p=0.005) individually mediated the relationship between grief reaction and PTSD symptoms.Conclusion Our study helps understand the mediating effects of volunteers’ depression or anxiety on the relationship between grief reactions and PTSD symptoms.