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  • Gastrointestinal Function
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Medicinal Cannabis and the Intestinal Microbiome

Abstract Historically, the multiple uses of cannabis as a medicine, food, and for recreational purposes as a psychoactive drug span several centuries. The various components of the plant (i.e., seeds, roots, leaves and flowers) have been utilized to alleviate symptoms of inflammation and pain (e.g., osteoarthritis, rheumatoid arthritis), mood disorders such as anxiety, and intestinal problems such as nausea, vomiting, abdominal pain and diarrhea. It has been established that the intestinal microbiota progresses neurological, endocrine, and immunological network effects through the gut–microbiota–brain axis, serving as a bilateral communication pathway between the central and enteric nervous systems. An expanding body of clinical evidence emphasizes that...
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Relief in Gastrointestinal Symptoms with Medical Marijuana Over 1 Year

Abstract Introduction: Subjective improvement in gastrointestinal (GI) symptoms was assessed among patients using medical marijuana (MMJ). Methods: Participants completed surveys at 0 days, 30 days, 6 months, and 12 months with questions about the severity of their GI symptoms on a scale from 1 (mild) to 3 (severe). Results: In each survey, participants reported a significant decrease in GI symptom severity when using MMJ versus when not using MMJ (p < 0.05). The most common self-reported side effects from using MMJ were increased appetite (12–21.4%), fatigue (6–16.7%), anxiety (4–11.9%), cough (4–11.9%), headache (6–7.9%), and dry mouth (4–7.1%). Conclusion: In patients with chronic GI symptoms, MMJ may provide persistent symptom severity improvement. Limited...
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Cannabis and cannabinoid-microbiome interactions in varied clinical contexts: A comprehensive systematic review

Abstract With legalisation of cannabis for both medicinal and recreational use expanding to more world nations, grasping its effects on the human body is vital. The microbiome is critical to human health and disease, and accumulating data suggests that it is influenced by a variety of external variables, including marijuana/cannabis and cannabinoids. We therefore conducted a comprehensive assessment of the literature to analyse cannabis and cannabinoid effects on the human microbiota. We searched PubMed, Embase and Cochrane Library CENTRAL databases for studies involving the use of marijuana, medical cannabis, cannabinoids and cannabinoid-like lipid mediators on microbiota, across all clinical conditions. Nine studies were identified:...
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Cannabis-Induced Gastrointestinal Tract Symptoms in the Adult Population: A Systematic Review

Abstract Objective: Cannabinoid usage is widespread in the self-management of various medical ailments. However, adverse effects have been reported with use, especially pertaining to the gastrointestinal system in adults and aged patients. These range from nausea, vomiting, bloating, or abdominal pain. This systematic review of previously reported cannabis-induced gastrointestinal symptoms in the adult population from the literature provides an analysis of relevant data to enhance knowledge and awareness of this topic.Methods: PubMed, Ovid MEDLINE, Cochrane Central, EMBASE, and Google Scholar databases were searched for relevant studies published from inception to March 2023. Results: The search yielded 598 results, of which 13 were deemed relevant and underwent further...
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Acute Δ9-tetrahydrocannabinol blocks gastric hemorrhages induced by the nonsteroidal anti-inflammatory drug diclofenac sodium in mice

Please use this link to access this publication. Abstract Nonsteroidal anti-inflammatory drugs (NSAIDs), which are among the most widely used analgesics in the world, cause gastrointestinal inflammation that is potentially life-threatening. Although inhibitors of endocannabinoid catabolic enzymes protect against gastropathy in fasted NSAID-treated mice, the gastroprotective effects of Δ9-tetrahydrocannabinol (THC), the primary psychoactive component of marijuana, have yet to be investigated. Male C57BL/6J mice were fasted, administered vehicle or Δ9-THC (.01–50 mg/kg; oral or intraperitoneal), and then treated with the NSAID diclofenac sodium (100 mg/kg, p.o.) to induce gastric lesions. In separate groups of mice, the cannabimimetic behavioral effects of Δ9-THC given via each route of administration were compared using a battery of tests, consisting...
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Cannabinoid Attenuation of Intestinal Inflammation in Chronic SIV-Infected Rhesus Macaques Involves T Cell Modulation and Differential Expression of Micro-RNAs and Pro-inflammatory Genes

Abstract Cannabis use is frequent in HIV-infected individuals for its appetite stimulation and anti-inflammatory effects. To identify the underlying molecular mechanisms associated with these effects, we simultaneously profiled micro-RNA (miRNA) and mRNA expression in the colon of chronically simian immunodeficiency virus (SIV)-infected rhesus macaques administered either vehicle (VEH/SIV; n = 9) or Δ9-tetrahydrocannabinol (Δ9-THC; THC/SIV; n = 8). Pro-inflammatory miR-130a, miR-222, and miR-29b, lipopolysaccharide-responsive miR-146b-5p and SIV-induced miR-190b were significantly upregulated in VEH/SIV rhesus macaques. Compared to VEH/SIV rhesus macaques, 10 miRNAs were significantly upregulated in THC/SIV rhesus macaques, among which miR-204 was confirmed to directly target MMP8, an extracellular matrix-degrading collagenase that was significantly downregulated in THC/SIV...
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Combination of cannabinoids, delta-9-tetrahydrocannabinol (THC) and cannabidiol (CBD), mitigates experimental autoimmune encephalomyelitis (EAE) by altering the gut microbiome

Please use this link to access this publication. Abstract Currently, a combination of marijuana cannabinoids including delta-9-tetrahydrocannabinol (THC) and cannabidiol (CBD) is used as a drug to treat muscle spasticity in patients with Multiple Sclerosis (MS). Because these cannabinoids can also suppress inflammation, it is unclear whether such patients benefit from suppression of neuroinflammation and if so, what is the mechanism through which cannabinoids act. In the currently study, we used a murine model of MS, experimental autoimmune encephalomyelitis (EAE), to study the role of gut microbiota in the attenuation of clinical signs of paralysis and inflammation caused by cannabinoids. THC + CBD treatment attenuated EAE and caused significant decrease...
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Fish Oil, Cannabidiol and the Gut Microbiota: An Investigation in a Murine Model of Colitis

Abstract Inflammatory bowel disorders can be associated with alterations in gut microbiota (dysbiosis) and behavioral disturbances. In experimental colitis, administration of fish oil (FO) or cannabinoids, such as cannabidiol (CBD), reduce inflammation. We investigated the effect of combined FO/CBD administration on inflammation and dysbiosis in the dextran sulphate sodium (DSS) model of mouse colitis, which also causes behavioral disturbances. Colitis was induced in CD1 mice by 4% w/v DSS in drinking water for five consecutive days followed by normal drinking water. FO (20–75 mg/mouse) was administered once a day starting two days after DSS, whereas CBD (0.3–30 mg/kg), alone or after FO administration, was...
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Marijuana Use in Patients with Symptoms of Gastroparesis: Prevalence, Patient Characteristics, and Perceived Benefit

Please use this link to access this publication. Abstract Background Marijuana may be used by some patients with gastroparesis (Gp) for its potential antiemetic, orexigenic, and pain-relieving effects. Aims The aim of this study was to describe the use of marijuana by patients for symptoms of Gp, assessing prevalence of use, patient characteristics, and patients’ perceived benefit on their symptoms of Gp. Methods Patients with symptoms of Gp underwent history and physical examination, gastric emptying scintigraphy, and questionnaires assessing symptoms. Patients were asked about the current use of medications and alternative medications including marijuana. Results Fifty-nine of 506 (11.7%) patients with symptoms of Gp...
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Potential Probiotic or Trigger of Gut Inflammation – The Janus-Faced Nature of Cannabidiol-Rich Cannabis Extract

Please use this link to access this publication. Abstract Cannabidiol (CBD) is the major non-psychotropic phytocannabinoid present in Cannabis sativa. In 2018, Congress designated certain C. sativa plant material as “hemp,” thus removing it from the DEA’s list of controlled substances. As a result, CBD-containing hemp extracts and other CBD products are now widely available and heavily marketed, yet their FDA regulatory status is still hotly debated. The goal of this study was to investigate the effects of a cannabidiol-rich cannabis extract (CRCE) on the gut microbiome and associated histomorphological and molecular changes in the mouse gut mucosa. Male C57BL6/J mice were gavaged with either 0, 61.5,...
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