Fiber2026

Gut feelings and sweet teeth: nutritional solutions to the gut damage in inflammatory bowel disease and HIV infection.

Labiner Anna, Spoiala Elena-Lia, Apetrei Cristian, Trandafir Laura Mihaela et al. — Frontiers in nutrition

Summary

This paper explores how inflammatory bowel disease (IBD) and HIV infection both cause damage to the gut lining, leading to inflammation and imbalances in gut bacteria. It suggests that dietary changes, particularly increasing fiber intake, can be a promising non-medication strategy to help repair the gut, reduce inflammation, and improve overall health for individuals with these conditions.

AI-generated summary — read the original

Key points

Inflammatory bowel disease (IBD) and HIV infection both damage the gut lining, leading to inflammation and an imbalance of gut bacteria.
This gut damage can contribute to broader health issues throughout the body.
Dietary interventions, such as increasing fiber intake, show promise as a non-medication approach to support gut health.
Proper nutrition may help reduce inflammation and improve overall well-being in individuals with these conditions.

What the study looked at

This paper investigated how two seemingly different conditions, inflammatory bowel disease (IBD) and HIV infection, both lead to damage in the gut lining. It also explored whether nutritional strategies could offer solutions to repair this damage and reduce associated inflammation. This was a review article that synthesized existing scientific literature. It compared the impact of IBD (specifically in children) and HIV infection (using nonhuman primate models) on the gut's integrity and the balance of its microbial communities. The authors also examined various dietary interventions, such as micronutrient intake, specific feeding methods, and different diets including high-fiber, Mediterranean, and high-fat approaches, to understand their effects on disease progression and cellular processes. The review highlighted that both IBD and HIV infection disrupt the gut's protective barrier, leading to increased inflammation and an imbalance in gut bacteria, although the exact ways they do this differ. In both conditions, there's a shift away from beneficial, fiber-fermenting bacteria towards those that can fuel inflammation. The paper concluded that dietary interventions, particularly those focusing on nutrition like high-fiber diets, hold considerable promise as non-drug methods to improve gut health, lessen inflammation, and positively impact overall well-being.

Dietary takeaway

This review suggests that prioritizing a diet rich in fiber could be a valuable strategy for individuals managing conditions like IBD or HIV, as fiber supports a healthy gut environment and may help reduce inflammation. Incorporating more fruits, vegetables, whole grains, and legumes into daily meals can increase fiber intake. However, it's important to remember that this is a review of existing research, and while promising, no single study or review provides definitive medical advice; always consult healthcare professionals for personalized guidance.

Abstract

Damage to the mucosal layer of the gut is a central feature of chronic inflammatory diseases, often resulting in gut dysbiosis, microbial imbalances, and dysregulated immunometabolism. Gut dysfunction significantly impacts human health, disrupting metabolic, cardiovascular, and neurological systems, and leading to metabolic syndrome. Here, we discuss two clinical entities that are apparently unrelated but actually share similar alterations to gut mucosal barrier integrity: inflammatory bowel disease (IBD) and human immunodeficiency virus (HIV). We use the particular cases of pediatric IBD and nonhuman primate models of HIV infection to compare and contrast the impact of these diseases on gut integrity and microbiome composition. We also explore potential therapies, focusing on dietary interventions. Both HIV infection and IBD cause gut barrier disruption, but via different mechanisms. HIV rapidly depletes mucosal CD4 T cells (especially Th17 cells), weakening epithelial defenses, leading to a loss of tight junctions ("leaky gut"), microbial translocation, and systemic inflammation. In IBD (Crohn's disease and ulcerative colitis), chronic immune attacks on the gut lining produce ulcers and tight-junction defects. These ulcerations trigger immune-cell infiltration and markedly increase permeability. In both conditions, impaired mucus and epithelial integrity result in higher circulating lipopolysaccharides (LPS), macrophage activation, and systemic inflammation. HIV and IBD also induce distinct yet overlapping dysbioses. HIV infection is associated with markedly reduced bacterial diversity and an overgrowth of potentially inflammatory taxa (e.g., Proteobacteria, Prevotella). Similarly, IBD patients have low diversity and loss of beneficial Firmicutes (notably ) with relative overabundance. In both diseases, the gut flora shifts away from fiber-fermenting commensals to "pathobionts," fueling local inflammation. While the therapeutic potential of targeting metabolic products is widely explored, there is also a push towards discovering nondrug solutions, particularly through diet and nutrition. We present the effects of micronutrient intake, feeding mechanisms (exclusive enteral nutrition), and different diets (high fiber, Mediterranean, high fat) on disease progression and cellular metabolism. As a low-intervention approach, nutrition has enormous potential to improve human health by reducing inflammation and associated metabolic disturbances. Finally, we emphasize the capabilities of using animal models to elucidate the complexities of disease mechanics in IBD and HIV.

View on PubMed →DOI: 10.3389/fnut.2026.1878885