Gastric Intestinal MetaplasiaNCT04365946
Microbiome Analysis in Gastric Intestinal Metaplasia and in Gastric Cancer and Subtypes Correlation
An observational study of Gastric Intestinal Metaplasia and Gastric Cancer, run by University Hospital, Ioannina at 1 site in Greece.
Trial summary
The aim of the study will be to analyze the microbiome in the blood and stomach in patients with intestinal metaplasia (IM) and / or gastric cancer (GC). As far as IM is concerned, it has been found that the incomplete type is related to GC mainly intestinal-type. Read more about this study
- Who is it for?
- Ages 18 to 75 yearsHealthy volunteers can take part
- Conditions the study is for
- Gastric Intestinal Metaplasia, Gastric Cancer, Microbiome
- What is being tested?
- Gastroscopy
- Type of treatment
- Surgery or procedure
- How many people
- 80 participants
- Where
- 1 siteGreece
- Study dates
- 18 Apr 2020to 15 May 2023
- How long will I take part?
- 3 Years
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 75 years
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Study population: Patients with gastric intestinal metaplasia and/or gastric cancer, and healthy controls
Who may be able to join
- Patients with gastric intestinal metaplasia and/or gastric cancer
- Healthy controls
Who cannot join
- Metabolic syndrome and its components
- IBD
- Autoimmune diseases
- Otherwise tumours
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Microbiome Analysis in Patients With Gastric Intestinal Metaplasia and in Patients With Gastric Cancer and Correlation With the Subtypes of the Lesions
The aim of the study will be to analyze the microbiome in the blood and stomach in patients with intestinal metaplasia (IM) and / or gastric cancer (GC). As far as IM is concerned, it has been found that the incomplete type is related to GC mainly intestinal-type. Studies show differences in the microbiome in patients with IM and in patients with GC, but do not specify whether these differences are related to histological types.
Our intention is to further analyze the microbiome based on histological types. Most studies on stomach cancer have focused on the microbiota of gastric microbiota. Recent data have shown that the microbiome of the small intestine, especially the mucosa, can play a key role in the condition of the gastrointestinal tract. Disturbance of the microbiome of the small intestine has been found in celiac disease, chronic liver disease, diabetes and irritable bowel syndrome. However, information on the role of the microbiome in IM remains limited.
Read the detailed description
Review of research area Intestinal metaplasia of the stomach (IM) is generally considered a precancerous lesion and is associated with a small increase in the risk of developing gastric cancer (GC). Endoscopic monitoring has been proposed to control the risk of endangered populations. However, due to the lower incidence of GC in the United States and other Western countries, there is no specific monitoring protocol. In general, there are no widely accepted guidelines for IM management. Recently, the European Endoscopic Society as well as other European academic companies have developed documented guidelines for the management of patients with IM.
These guidelines emphasize the increased risk of cancer in patients with gastric atrophy and IM and the need for staging in cases of high-grade dysplasia. Risk factors for IM include Helicobacter pylori infection, high NaCl intake, smoking, alcohol consumption and chronic biliary reflux.
The development of intestinal-type gastric carcinoma occurs in four stages: non-atrophic gastritis, multifocal atrophic gastritis, IM, and dysplasia. The IM of the gastric cardia and the Barrett's esophagus differ in the risk of malignancy. Elevated serum pepsinogen levels have been suggested as an indicator of extensive gastric atrophy. Currently, there are no reliable markers of gastric dysplasia or gastric cancer.
Based on the available data, it appears that the IM of the gastric cardia is a possible precursor to the development of intestinal-type carcinoma of the stomach. It has been found that 45% of patients with gastric carcinoma had residual IM, supporting the idea that IM is a particularly important precursor to its development. Histologically, the IM may be complete or incomplete. Complete (type I) intestinal metaplasia is defined by the mucosa of the small intestinal type with mature absorbent cells, cell cups, and a brush-like outline. Incomplete intestinal metaplasia (type II) secretes cialomycin and is similar to colonic epithelium with columns of "intermediate" cells at various stages of differentiation, irregular mucosal droplets and the absence of a "brush" limit. The highest risk of gastric cancer is associated with incomplete and / or extensive IM.
Recent studies show that microbial changes are related to the histological stages of gastric oncogenesis. Chronic H. pylori infection can cause inflammation of the mucosa and cause histological changes. It is also recognized as an important risk factor for GC. However, only 3% of patients infected with H. pylori develop GC. In addition, H. pylori has been found to be usually undetectable in GC samples. These studies suggest that H. pylori infection may only be an early event for the gastric mucosa, which will undergo further oncogenic changes and indicate the possible role of mucosal microbes, with the exception of H. pylori in the gastric carcinoma.
The dominant germ type in the gastric mucosa was found to be protein-secreted bacteria, in both H. pylori negative and positive for H. pylori samples. Two previous studies have shown that the microbial count in IM patients was found to be partially overlapped with the group of gastritis and cancer among patients with H. pylori infection. Li et al (2017) found that the microbial amount in gastritis samples overlapped mostly with that of IM samples. In contrast, the microflora of patients with IM and GC had significantly lower microbial richness, while the biodiversity of the microbiology of patients with overt gastritis (EG), chronic gastritis (CG) and IM was similar in total, with the exception of those with GC. These conflicting results suggest that IM may be the key point in microbial change and that there may be other qualitative factors involved in gastric oncogenesis, especially in patients with IM.
Research subject and objectives The study will be performed on patients undergoing gastroscopy who have IM and / or GC findings. In patients with IM, the microbiome will be analyzed and correlated with the type of IM (complete-incomplete). The same will be done for patients with GC (intestinal-type cancer).
Thematic area The aim of the study will be to analyze the microbiome in the blood and stomach in patients with intestinal metaplasia (IM) and / or gastric cancer (GC). As far as IM is concerned, it has been found that the incomplete type is related to GC mainly intestinal-type. Studies show differences in the microbiome in patients with IM and in patients with GC, but do not specify whether these differences are related to histological types.
Our intention is to further analyze the microbiome based on histological types. Most studies on stomach cancer have focused on the microbiota of gastric microbiota. Recent data have shown that the microbiome of the small intestine, especially the mucosa, can play a key role in the condition of the gastrointestinal tract. Disturbance of the microbiome of the small intestine has been found in celiac disease, chronic liver disease, diabetes and irritable bowel syndrome. However, information on the role of the microbiome in IM remains limited.
Keywords Gastric intestinal metaplasia, Complete Type, Incomplete Type, Gastric Cancer, Microbiome
- Conditions
- Gastric Intestinal Metaplasia, Gastric Cancer, Microbiome
- Being tested
- Gastroscopy
- Keywords
- Gastric intestinal metaplasia, Gastric cancer, Subtypes, Microbiome
- Medical subject headings
- Stomach Neoplasms
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
GastroscopyProcedure or surgery
Upper GI endoscopy and biopsy
| Study group | Role | What they receive |
|---|---|---|
| Complete type | Patients with complete-type intestinal metaplasia Receives: Procedure: Gastroscopy | |
| Incomplete type | Patients with incomplete-type intestinal metaplasia Receives: Procedure: Gastroscopy | |
| Controls | Healthy subjects Receives: Procedure: Gastroscopy |
What is being measured
The primary outcome is the main question the study is designed to answer.
Analysis of microbiome in subtypes of intestinal metaplasia and gastric cancer
Microbiome analysis with complete and incomplete type of intestinal metaplasia and subtypes of gastric cancer
Measured: Through study completion, an average of 1 year.
Analysis of microbiome in subtypes of intestinal metaplasia and gastric cancer
Microbiome correlation with complete and incomplete type of intestinal metaplasia and subtypes of gastric cancer
Measured: Through study completion, an average of 1 year.
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted28 Apr 2020
- Study start18 Apr 2020
- Primary completion14 Sep 2020 (estimated)
- Study completion15 May 2023 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (11)Papers the sponsor has linked to this study.
- Other trials for Gastric Intestinal MetaplasiaStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Case-control
- Time perspective
- Prospective
- Enrolment
- 80 participants (estimated)
- Target duration
- 3 Years
Sponsor and investigators
- Lead sponsor
- University Hospital, Ioannina
- Sponsor type
- University, hospital or other
- Collaborators
- University of Ioannina
- Responsible party
- Principal investigator, George Pappas-Gogos, University Hospital, Ioannina
- Investigators
- Konstantinos Vlachos, Prof, Study director, University of IoanninaGeorge Pappas-Gogos, Dr, Principal investigator, University Hospital, Ioannina
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT04365946
- Sponsor's protocol ID
- 1
- Status last verified
- Apr 2020
- First submitted
- 22 Apr 2020
- Last updated
- 28 Apr 2020
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Yes: All collected IPD, all IPD that underlie results in a publication
Publications
Gao JJ, Zhang Y, Gerhard M, Mejias-Luque R, Zhang L, Vieth M, Ma JL, Bajbouj M, Suchanek S, Liu WD, Ulm K, Quante M, Li ZX, Zhou T, Schmid R, Classen M, Li WQ, You WC, Pan KF. Association Between Gut Microbiota and Helicobacter pylori-Related Gastric Lesions in a High-Risk Population of Gastric Cancer. Front Cell Infect Microbiol. 2018 Jun 19;8:202. doi: 10.3389/fcimb.2018.00202. eCollection 2018.
PubMed 29971220Liu X, Shao L, Liu X, Ji F, Mei Y, Cheng Y, Liu F, Yan C, Li L, Ling Z. Alterations of gastric mucosal microbiota across different stomach microhabitats in a cohort of 276 patients with gastric cancer. EBioMedicine. 2019 Feb;40:336-348. doi: 10.1016/j.ebiom.2018.12.034. Epub 2018 Dec 21.
PubMed 30584008Wang L, Zhou J, Xin Y, Geng C, Tian Z, Yu X, Dong Q. Bacterial overgrowth and diversification of microbiota in gastric cancer. Eur J Gastroenterol Hepatol. 2016 Mar;28(3):261-6. doi: 10.1097/MEG.0000000000000542.
PubMed 26657453Gong J, Li L, Zuo X, Li Y. Change of the duodenal mucosa-associated microbiota is related to intestinal metaplasia. BMC Microbiol. 2019 Dec 9;19(1):275. doi: 10.1186/s12866-019-1666-5.
PubMed 31815623Eun CS, Kim BK, Han DS, Kim SY, Kim KM, Choi BY, Song KS, Kim YS, Kim JF. Differences in gastric mucosal microbiota profiling in patients with chronic gastritis, intestinal metaplasia, and gastric cancer using pyrosequencing methods. Helicobacter. 2014 Dec;19(6):407-16. doi: 10.1111/hel.12145. Epub 2014 Jul 23.
PubMed 25052961Park CH, Lee AR, Lee YR, Eun CS, Lee SK, Han DS. Evaluation of gastric microbiome and metagenomic function in patients with intestinal metaplasia using 16S rRNA gene sequencing. Helicobacter. 2019 Feb;24(1):e12547. doi: 10.1111/hel.12547. Epub 2018 Nov 15.
PubMed 30440093Hsieh YY, Tung SY, Pan HY, Yen CW, Xu HW, Lin YJ, Deng YF, Hsu WT, Wu CS, Li C. Increased Abundance of Clostridium and Fusobacterium in Gastric Microbiota of Patients with Gastric Cancer in Taiwan. Sci Rep. 2018 Jan 9;8(1):158. doi: 10.1038/s41598-017-18596-0.
PubMed 29317709Park CH, Lee JG, Lee AR, Eun CS, Han DS. Network construction of gastric microbiome and organization of microbial modules associated with gastric carcinogenesis. Sci Rep. 2019 Aug 27;9(1):12444. doi: 10.1038/s41598-019-48925-4.
PubMed 31455798Jencks DS, Adam JD, Borum ML, Koh JM, Stephen S, Doman DB. Overview of Current Concepts in Gastric Intestinal Metaplasia and Gastric Cancer. Gastroenterol Hepatol (N Y). 2018 Feb;14(2):92-101.
PubMed 29606921Schulz C, Schutte K, Mayerle J, Malfertheiner P. The role of the gastric bacterial microbiome in gastric cancer: Helicobacter pylori and beyond. Ther Adv Gastroenterol. 2019 Dec 18;12:1756284819894062. doi: 10.1177/1756284819894062. eCollection 2019.
PubMed 31897087Cui J, Cui H, Yang M, Du S, Li J, Li Y, Liu L, Zhang X, Li S. Tongue coating microbiome as a potential biomarker for gastritis including precancerous cascade. Protein Cell. 2019 Jul;10(7):496-509. doi: 10.1007/s13238-018-0596-6. Epub 2018 Nov 26.
PubMed 30478535
Study at a glance
From the registry record, last updated by the sponsor on 28 Apr 2020. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Microbiome Analysis in Patients With Gastric Intestinal Metaplasia and in Patients With Gastric Cancer and Correlation With the Subtypes of the Lesions
- ClinicalTrials.gov ID
- NCT04365946
- Acronym / sponsor ID
- 1
- Conditions
- Gastric Intestinal Metaplasia, Gastric Cancer, Microbiome
- Keywords
- Gastric intestinal metaplasia, Gastric cancer, Subtypes, Microbiome
- Study type
- Observational
- Recruitment status
- Unknown status
- Enrolment
- 80 participants (estimated)
- Lead sponsor
- University Hospital, IoanninaUniversity, hospital or other
- Collaborators
- University of Ioannina
- Study start
- 18 Apr 2020 (actual)
- Primary completion
- 14 Sep 2020 (estimated)
- Study completion
- 15 May 2023 (estimated)
- First posted
- 28 Apr 2020 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The aim of the study will be to analyze the microbiome in the blood and stomach in patients with intestinal metaplasia (IM) and / or gastric cancer (GC). As far as IM is concerned, it has been found that the incomplete type is related to GC mainly intestinal-type. Studies show differences in the microbiome in patients with IM and in patients with GC, but do not specify whether these differences are related to histological types.
Our intention is to further analyze the microbiome based on histological types. Most studies on stomach cancer have focused on the microbiota of gastric microbiota. Recent data have shown that the microbiome of the small intestine, especially the mucosa, can play a key role in the condition of the gastrointestinal tract. Disturbance of the microbiome of the small intestine has been found in celiac disease, chronic liver disease, diabetes and irritable bowel syndrome. However, information on the role of the microbiome in IM remains limited.
Detailed description
Review of research area Intestinal metaplasia of the stomach (IM) is generally considered a precancerous lesion and is associated with a small increase in the risk of developing gastric cancer (GC). Endoscopic monitoring has been proposed to control the risk of endangered populations. However, due to the lower incidence of GC in the United States and other Western countries, there is no specific monitoring protocol. In general, there are no widely accepted guidelines for IM management. Recently, the European Endoscopic Society as well as other European academic companies have developed documented guidelines for the management of patients with IM.
These guidelines emphasize the increased risk of cancer in patients with gastric atrophy and IM and the need for staging in cases of high-grade dysplasia. Risk factors for IM include Helicobacter pylori infection, high NaCl intake, smoking, alcohol consumption and chronic biliary reflux.
The development of intestinal-type gastric carcinoma occurs in four stages: non-atrophic gastritis, multifocal atrophic gastritis, IM, and dysplasia. The IM of the gastric cardia and the Barrett's esophagus differ in the risk of malignancy. Elevated serum pepsinogen levels have been suggested as an indicator of extensive gastric atrophy. Currently, there are no reliable markers of gastric dysplasia or gastric cancer.
Based on the available data, it appears that the IM of the gastric cardia is a possible precursor to the development of intestinal-type carcinoma of the stomach. It has been found that 45% of patients with gastric carcinoma had residual IM, supporting the idea that IM is a particularly important precursor to its development. Histologically, the IM may be complete or incomplete. Complete (type I) intestinal metaplasia is defined by the mucosa of the small intestinal type with mature absorbent cells, cell cups, and a brush-like outline. Incomplete intestinal metaplasia (type II) secretes cialomycin and is similar to colonic epithelium with columns of "intermediate" cells at various stages of differentiation, irregular mucosal droplets and the absence of a "brush" limit. The highest risk of gastric cancer is associated with incomplete and / or extensive IM.
Recent studies show that microbial changes are related to the histological stages of gastric oncogenesis. Chronic H. pylori infection can cause inflammation of the mucosa and cause histological changes. It is also recognized as an important risk factor for GC. However, only 3% of patients infected with H. pylori develop GC. In addition, H. pylori has been found to be usually undetectable in GC samples. These studies suggest that H. pylori infection may only be an early event for the gastric mucosa, which will undergo further oncogenic changes and indicate the possible role of mucosal microbes, with the exception of H. pylori in the gastric carcinoma.
The dominant germ type in the gastric mucosa was found to be protein-secreted bacteria, in both H. pylori negative and positive for H. pylori samples. Two previous studies have shown that the microbial count in IM patients was found to be partially overlapped with the group of gastritis and cancer among patients with H. pylori infection. Li et al (2017) found that the microbial amount in gastritis samples overlapped mostly with that of IM samples. In contrast, the microflora of patients with IM and GC had significantly lower microbial richness, while the biodiversity of the microbiology of patients with overt gastritis (EG), chronic gastritis (CG) and IM was similar in total, with the exception of those with GC. These conflicting results suggest that IM may be the key point in microbial change and that there may be other qualitative factors involved in gastric oncogenesis, especially in patients with IM.
Research subject and objectives The study will be performed on patients undergoing gastroscopy who have IM and / or GC findings. In patients with IM, the microbiome will be analyzed and correlated with the type of IM (complete-incomplete). The same will be done for patients with GC (intestinal-type cancer).
Thematic area The aim of the study will be to analyze the microbiome in the blood and stomach in patients with intestinal metaplasia (IM) and / or gastric cancer (GC). As far as IM is concerned, it has been found that the incomplete type is related to GC mainly intestinal-type. Studies show differences in the microbiome in patients with IM and in patients with GC, but do not specify whether these differences are related to histological types.
Our intention is to further analyze the microbiome based on histological types. Most studies on stomach cancer have focused on the microbiota of gastric microbiota. Recent data have shown that the microbiome of the small intestine, especially the mucosa, can play a key role in the condition of the gastrointestinal tract. Disturbance of the microbiome of the small intestine has been found in celiac disease, chronic liver disease, diabetes and irritable bowel syndrome. However, information on the role of the microbiome in IM remains limited.
Keywords Gastric intestinal metaplasia, Complete Type, Incomplete Type, Gastric Cancer, Microbiome
Study design
- Observational model
- Case-control
- Time perspective
- Prospective
- Target follow-up
- 3 Years
- Number of arms
- 3
| Arm | Type | Receives |
|---|---|---|
| Complete type | – | Procedure: GastroscopyPatients with complete-type intestinal metaplasia |
| Incomplete type | – | Procedure: GastroscopyPatients with incomplete-type intestinal metaplasia |
| Controls | – | Procedure: GastroscopyHealthy subjects |
Who may qualify
- Ages
- 18 to 75 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
- Study population
- Patients with gastric intestinal metaplasia and/or gastric cancer, and healthy controls
Key inclusion criteria (2 listed)
- Patients with gastric intestinal metaplasia and/or gastric cancer
- Healthy controls
Key exclusion criteria (4 listed)
- Metabolic syndrome and its components
- IBD
- Autoimmune diseases
- Otherwise tumours
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| GastroscopyUpper GI endoscopy and biopsy | Procedure or surgery | Complete type, Controls, Incomplete type |
Primary outcome
Analysis of microbiome in subtypes of intestinal metaplasia and gastric cancer
Time frame: Through study completion, an average of 1 year.
Microbiome analysis with complete and incomplete type of intestinal metaplasia and subtypes of gastric cancer
Analysis of microbiome in subtypes of intestinal metaplasia and gastric cancer
Time frame: Through study completion, an average of 1 year.
Microbiome correlation with complete and incomplete type of intestinal metaplasia and subtypes of gastric cancer
Results and safety
Results are not available in the source record.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 28 Apr 2020.
- Background: PubMed 29971220Gao JJ, Zhang Y, Gerhard M, Mejias-Luque R, Zhang L, Vieth M, Ma JL, Bajbouj M, Suchanek S, Liu WD, Ulm K, Quante M, Li ZX, Zhou T, Schmid R, Classen M, Li WQ, You WC, Pan KF. Association Between Gut Microbiota and Helicobacter pylori-Related Gastric Lesions in a High-Risk Population of Gastric Cancer. Front Cell Infect Microbiol. 2018 Jun 19;8:202. doi: 10.3389/fcimb.2018.00202. eCollection 2018.
- Background: PubMed 30584008Liu X, Shao L, Liu X, Ji F, Mei Y, Cheng Y, Liu F, Yan C, Li L, Ling Z. Alterations of gastric mucosal microbiota across different stomach microhabitats in a cohort of 276 patients with gastric cancer. EBioMedicine. 2019 Feb;40:336-348. doi: 10.1016/j.ebiom.2018.12.034. Epub 2018 Dec 21.
- Background: PubMed 26657453Wang L, Zhou J, Xin Y, Geng C, Tian Z, Yu X, Dong Q. Bacterial overgrowth and diversification of microbiota in gastric cancer. Eur J Gastroenterol Hepatol. 2016 Mar;28(3):261-6. doi: 10.1097/MEG.0000000000000542.
- Background: PubMed 31815623Gong J, Li L, Zuo X, Li Y. Change of the duodenal mucosa-associated microbiota is related to intestinal metaplasia. BMC Microbiol. 2019 Dec 9;19(1):275. doi: 10.1186/s12866-019-1666-5.
- Background: PubMed 25052961Eun CS, Kim BK, Han DS, Kim SY, Kim KM, Choi BY, Song KS, Kim YS, Kim JF. Differences in gastric mucosal microbiota profiling in patients with chronic gastritis, intestinal metaplasia, and gastric cancer using pyrosequencing methods. Helicobacter. 2014 Dec;19(6):407-16. doi: 10.1111/hel.12145. Epub 2014 Jul 23.
- Background: PubMed 30440093Park CH, Lee AR, Lee YR, Eun CS, Lee SK, Han DS. Evaluation of gastric microbiome and metagenomic function in patients with intestinal metaplasia using 16S rRNA gene sequencing. Helicobacter. 2019 Feb;24(1):e12547. doi: 10.1111/hel.12547. Epub 2018 Nov 15.
- Background: PubMed 29317709Hsieh YY, Tung SY, Pan HY, Yen CW, Xu HW, Lin YJ, Deng YF, Hsu WT, Wu CS, Li C. Increased Abundance of Clostridium and Fusobacterium in Gastric Microbiota of Patients with Gastric Cancer in Taiwan. Sci Rep. 2018 Jan 9;8(1):158. doi: 10.1038/s41598-017-18596-0.
- Background: PubMed 31455798Park CH, Lee JG, Lee AR, Eun CS, Han DS. Network construction of gastric microbiome and organization of microbial modules associated with gastric carcinogenesis. Sci Rep. 2019 Aug 27;9(1):12444. doi: 10.1038/s41598-019-48925-4.
- Background: PubMed 29606921Jencks DS, Adam JD, Borum ML, Koh JM, Stephen S, Doman DB. Overview of Current Concepts in Gastric Intestinal Metaplasia and Gastric Cancer. Gastroenterol Hepatol (N Y). 2018 Feb;14(2):92-101.
- Background: PubMed 31897087Schulz C, Schutte K, Mayerle J, Malfertheiner P. The role of the gastric bacterial microbiome in gastric cancer: Helicobacter pylori and beyond. Ther Adv Gastroenterol. 2019 Dec 18;12:1756284819894062. doi: 10.1177/1756284819894062. eCollection 2019.
- Background: PubMed 30478535Cui J, Cui H, Yang M, Du S, Li J, Li Y, Liu L, Zhang X, Li S. Tongue coating microbiome as a potential biomarker for gastritis including precancerous cascade. Protein Cell. 2019 Jul;10(7):496-509. doi: 10.1007/s13238-018-0596-6. Epub 2018 Nov 26.
- Individual participant dataSharing planned: Yes. All collected IPD, all IPD that underlie results in a publication
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Konstantinos Vlachos, Prof study director
University of Ioannina
George Pappas-Gogos, Dr principal investigator
University Hospital, Ioannina
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Gastric Intestinal Metaplasia and Gastric Cancer, run by University Hospital, Ioannina at 1 site in Greece.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: status not confirmed, as of the sponsor's last update on 28 Apr 2020. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Greece. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
Results are not available in the source record.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Analysis of microbiome in subtypes of intestinal metaplasia and gastric cancer (time frame: Through study completion, an average of 1 year.). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT04365946, which also lists 11 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 28 Apr 2020.