Oral microbiota and radiation-induced mucositis
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ABSTRACT:
PROVIDER: PRJEB15392 | ENA |
REPOSITORIES: ENA
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Project description:Objective: Head and neck cancer (HNC) accounts for almost 850,000 new cases per year. Radiotherapy (RT) is used to treat the majority of these patients. A common side-effect of RT-treatment is onset of oral mucositis: a painful irritation and swelling in mouth, which decreases the quality of life and is the major dose-limiting factor in RT. To understand the origin of oral mucositis, the biological mechanisms post-ionizing radiation (IR) need to be understood. This knowledge can be used to develop new treatment targets for oral mucositis and markers for the early identification of “at risk” patients. Results: Mass spectrometry-based proteomics identified 5879 proteins in primary keratinocytes and 4597 proteins in OKF6 cells. Amongst them, 212 proteins in primary keratinocytes and 169 proteins in OKF6 cells were significantly differentially abundant 96 h after 6 Gy irradiation compared to sham-irradiated controls. Protein-protein in silico enrichment predicted interferon (IFN) response and DNA strand elongation pathways as mostly affected pathways in both cell systems. Both pathways were confirmed in OKF6 cells. Immunoblot validations showed a decrease in minichromosome maintenance (MCM) complex proteins 2-7 and an increase in IFN associated proteins STAT1 and ISG15. In line with affected IFN signalling, mRNA levels of IFNβ and interleukin 6 (IL-6) increased significantly following irradiation and also levels of secreted IL-1β IL-6, IP-10, and ISG15 were elevated. Conclusion: This study has investigated biological mechanisms in keratinocytes post-in vitro ionizing radiation. A common radiation signature in keratinocytes was identified. A role of IFN response in keratinocytes along with increased levels of pro-inflammatory cytokines and proteins could hint towards a possible mechanism for oral mucositis.
2023-06-09 | PXD040398 | Pride
Project description:Chemotherapy may cause DNA damage within the oral mucosa of cancer patients leading to mucositis, a dose-limiting side effect for effective cancer treatment. We used whole genome gene expression analysis to identify cellular damage to the mucosal tissue occuring two days post induction chemotherapy and identified gene expression patterns that may or may not be predictive of oral mucositis. Keywords: Treatment effect
2009-01-01 | GSE10746 | GEO
Project description:To reveal the molecular mechanisms underlying oral ulcerative mucositis-induced pain, we investigated putative pain-associated mediators, pain-related behaviors and gene modulation in a rat oral mucositis model. On day 1 after acetic acid treatment, the mucosal area showed slight redness and swelling but no evidence of ulceration or pain induction. On day 2, oral ulcers were obvious, as was the induction of spontaneous and mechanical pain. In the treated mucosal area, bacterial loading and prostaglandin E2 increased beginning on day 2; no significant changes were observed on day 1. DNA microarray analysis of trigeminal ganglion tissue collected on day 2 identified 32 significantly regulated genes (>1.5-fold change in expression). The up-regulation of the top 3 genes, Hamp (hepcidin antimicrobial peptide), Reg3b (regenerating islet-derived 3β) and Serpina3n (serine peptidase inhibitor A3N), was validated through quantitative RT-PCR. Systemic antibiotic pre-treatment did not increase the mRNA levels. Therefore, we conclude that the oral ulcerative mucositis-induced pain is caused by infectious inflammation of the ulcerative area and stimulates anti-bacterial and anti-peptidase gene expressions in sensory neurons. Oral ulcerative mucositis-induced gene expression in trigeminal ganglion tissue was measured. Ten Wistar rats were divided into the following two groups, control, oral ulcerative mucositis (stomatitis). Five rats were anesthetized with sodium pentobarbital. A piece of filter paper was soaked in 50% acetic acid diluted with water and placed in the labial fornix region of the inferior incisors of rats for 30 sec. Other five rats received only anesthesia without any treatment were used as a control. On day 2 after acetic acid treatment, oral ulcerative mucositis was obvious and trigeminal ganglion tissues in two groups were collected for DNA microarray analysis.
2016-06-15 | E-GEOD-83349 | biostudies-arrayexpress
Project description:To reveal the molecular mechanisms underlying oral ulcerative mucositis-induced pain, we investigated putative pain-associated mediators, pain-related behaviors and gene modulation in a rat oral mucositis model. On day 1 after acetic acid treatment, the mucosal area showed slight redness and swelling but no evidence of ulceration or pain induction. On day 2, oral ulcers were obvious, as was the induction of spontaneous and mechanical pain. In the treated mucosal area, bacterial loading and prostaglandin E2 increased beginning on day 2; no significant changes were observed on day 1. DNA microarray analysis of trigeminal ganglion tissue collected on day 2 identified 32 significantly regulated genes (>1.5-fold change in expression). The up-regulation of the top 3 genes, Hamp (hepcidin antimicrobial peptide), Reg3b (regenerating islet-derived 3β) and Serpina3n (serine peptidase inhibitor A3N), was validated through quantitative RT-PCR. Systemic antibiotic pre-treatment did not increase the mRNA levels. Therefore, we conclude that the oral ulcerative mucositis-induced pain is caused by infectious inflammation of the ulcerative area and stimulates anti-bacterial and anti-peptidase gene expressions in sensory neurons.
2016-06-15 | GSE83349 | GEO
Project description:Chemotherapy may cause DNA damage within the oral mucosa of cancer patients leading to mucositis, a dose-limiting side effect for effective cancer treatment. We used whole genome gene expression analysis to identify cellular damage to the mucosal tissue occuring two days post induction chemotherapy and identified gene expression patterns that may or may not be predictive of oral mucositis. Experiment Overall Design: Punch buccal biopsies from healthy controls (HC, samples BRENC1, BRENC2, BRENC3, n=3) and five AML patients pre-chemotherapy (Pre-C, samples BREN11, BREN21, BREN41, BREN51, n=4) and (Post-C, samples BREN22, BREN32, BREN42, BREN52, n=4)(Ntotal=11) gave suitable RNA integrity to perform microarray analysis. Samples Pre-C:BREN31 and post-C:BREN12 were not suitable for microarray analysis. Human Genome U133 Plus 2.0 Array (Affymetrix, Santa Clara, CA) was used to conduct gene expression profiling.
2009-01-14 | E-GEOD-10746 | biostudies-arrayexpress
Project description:Objectives: In patients with tonsil squamous cell cancer (TSCC), radiation-therapy (RT) induce mucositis, which is clinically challenging with limited prophylactic interventions and no predictive tests. In a pilot study set-up, we performed global gene-expression analysis on human oral mucosa tissue and blood cells to identify differential expressed genes involved in mucositis pathogenesis. Materials and Methods: Eight patients with TSCC had consecutive buccal biopsies and blood samples taken before, after 7 days of RT, and 20 days following RT. We monitored clinical mucositis and applied gene-expression analysis to the tissues. Single biopsies and blood tests from 9 healthy individuals served as controls (CON). Results: In response to RT, we did not register changes in the blood cells, but we found upregulation of both apoptosis inducers and inhibitors in the mucosa: EDA2R and MDM2; and POLH, encoding a polymerase that replicates UV-damaged DNA. Six members of the histone cluster family, e.g., HIST1H3B, involved in nucleosome structure, were downregulated. Genes related to proliferation were also altered: MKI67 (downregulated), encoding Ki-67-proliferation; and KRT16 (upregulated), encoding keratin16, characteristic in early differentiated epithelial cells. None of these alterations were associated to mucositis severity. However, before treatment, LY6G6C, which encodes a surface immunoregulatory protein, was upregulated in NM compared to UM, although not significantly. Conclusion: RT caused divergent changes in genes expression related to DNA damage and proliferation, all independently altered of mucositis severity. LY6G6C may be a potential predictive biomarker for UM following RT. Based on these result, we will design a prospective clinical validation trial, including more patients.
2017-12-22 | GSE103412 | GEO
Project description:We studied the radiation effect on cell culture model of oral mucositis. The musositis model (tissues) used is an organotypic model which consisted of 3 dimensional (3-D) cell cultures of primary human oral keratinocytes grown on top of primary oral fibroblasts and resembles oral mucosal (tissues). The tissues were purchased from MatTek corporation (Ashland, MA) and were grown on top of microporous membrane and supplemented with MatTek serum free media. These tissues were irradiated with 12 and 2 Gy. Six hours after the irradiation the tissues were cut in half. Half of the tissue was used to extract total RNA (RNeasy Plus Mini kit, Qiagen, Germantown, MD) and the other half was used to evaluate the histology and the apoptosis. We had the following groups: Non-Irradiated Tissue, Irradiated Tissue with 12 Gy and Irradiated Tissues with 2 Gy.
2014-10-16 | GSE62395 | GEO
Project description:Purpose: Previously, we have reported the effectiveness of elemental diet (ED) Elental® against radiotherapy- or chemoradiotherapy- induced oral mucositis (Support Care Cancer 2016, Mol Clin Oncol 2019). However, administration of additional nutrition or ED in oral cancer patients might also provide extra nutrition for cancer cells, which could result in cancer development. At present, it is still unclear whether the beneficial effect of ED can be expected to surpass its possible harmful effect on oral cancer treatment. In the present study, we tried to clarify whether Elental® has different effects on human oral keratinocyte (HOK) cells compared to oral squamous cell carcinoma (OSCC) cells (HSC2). Method: Gene expression profiles of HOK cells and HSC2 cells treated with Elental® were generated by deep sequencing. Results: Whole transcriptome analysis data suggested that Elental® helped in the proliferation and survival of HOK through the induction of ERK. Moreover, Elental® added stress to HSC2 through the induction of endoplasmic reticulum stress response marker, BiP. Our results showed that Elental® might add stress to HSC2, and provide growth stimulation to HOK. Conclusion: Whole transcriptome analysis showed different gene expression profile between HOK cells and HSC2 cells treated with Elental®, suggesting that effects of Elental® might differ between normal oral cells and oral cancer cells.
2021-07-31 | GSE151420 | GEO
Project description:oral microbiota and radiotherapy for CRC
| PRJEB38064 | ENA
Project description:In cancer patients, an elemental diet (ED) reduces adverse effects of chemotherapy, including oral mucositis. However, the detailed mechanism(s) of the healing effects of an ED remains unclear. In this study, the protective effects of the ED, Elental®, were examined against 5-fluorouracil (5-FU)-induced oral mucositis and salivary gland atrophy in mice. Mucositis was induced in female ICR mice by injection of 5-FU. The mice were orally administered Elental® (ED group) or saline (control group). After treatment, whole transcriptome analysis and network analysis were conducted to understand the mechanism(s) of action of Elental® against oral mucositis. Whole transcriptome analysis and Ingenuity Pathways Analysis (IPA) data suggested that Elental® contributed to the recovery of mitochondrial function in 5-FU-damaged salivary glands.
2022-05-05 | GSE196407 | GEO