ArticleMolecular medicine (Cambridge, Mass.)2025
Ghrelin mitigates partial body irradiation-induced gastrointestinal acute radiation syndrome by promoting intestinal stem cell regeneration.
Article in Molecular medicine (Cambridge, Mass.), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Radiotherapy-Induced Side Effects: Epidemiology, Pathogenesis, Prevention and Treatments.MedComm · 2026Review
- Ghrelin Induces CluInternational journal of molecular sciences · 2026Article
- The role of the gut microbiota in radiation enteritis: from mechanistic insights to therapeutic applications.Communications biology · 2026Review
- CRISPR/Cas9 Genome Editing in Oncology: Mechanisms, Therapeutic Platforms and Translational Challenges.Molecular biotechnology · 2026Review
- Radiomitigators: Breakthroughs in Post-Radiation Recovery.Antioxidants (Basel, Switzerland) · 2026Review
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7 authors.
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Abstract
backgroundGastrointestinal acute radiation syndrome (GI-ARS) is characterized by disruption of the intestinal barrier function, leading to bacterial translocation and sepsis. Intestinal stem cells are highly radiosensitive and dramatically reduced after radiation injury. Clusterin (Clu)-positive revival stem cells contribute to the restoration of intestinal stem cells. Ghrelin, a gastric peptide hormone, has been shown to improve intestinal integrity in models of inflammatory enteropathy. In this study, we investigated the effects of ghrelin on intestinal stem cell recovery and its potential to mitigate radiation-induced intestinal injury.
methodsMice were subjected to 12 Gy partial body irradiation (PBI). Ghrelin at the doses of 2 to 6 nmol per mouse was administered daily for 4 consecutive days, starting at 24 h post-PBI, and survival was monitored for 30 days. To assess intestinal histology, cell proliferation, and intestinal stem cell markers, mice were treated with 6 nmol of ghrelin on days 1, 2, and 3 post-PBI, and on day 4 jejunal samples were collected for qPCR, immunofluorescence, and microcolony assays. Intestinal permeability was assessed in vivo by the leakage of gavage-fed 4-kDa FITC-dextran into the circulation.
resultsGhrelin administration significantly improved 30-day survival rate following 12-Gy PBI in a dose-dependent manner. Treatment with ghrelin restored villus length and enhanced intestinal barrier integrity. Ghrelin also significantly increased the expression of proliferation markers in the jejunum. Microcolony assays revealed that ghrelin reversed the decrease in BrdU-positive cells following PBI. The mRNA and protein expression of intestinal stem cell markers was decreased after PBI but was restored by ghrelin treatment. Finally, ghrelin significantly increased the population of Clu
conclusionsThese findings indicate that ghrelin mitigates radiation-induced intestinal injury by promoting the expansion of Clu
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