Evaluation of Skin, Colonic, and Oral Microbiome and Effect of Time and Antibiotic Treatment on Organism Diversity at Each Site
|First Received Date ICMJE||June 11, 2010|
|Last Updated Date||July 14, 2016|
|Start Date ICMJE||November 2009|
|Primary Completion Date||Not Provided|
|Current Primary Outcome Measures ICMJE||Not Provided|
|Original Primary Outcome Measures ICMJE||Not Provided|
|Change History||Complete list of historical versions of study NCT01143571 on ClinicalTrials.gov Archive Site|
|Current Secondary Outcome Measures ICMJE||Not Provided|
|Original Secondary Outcome Measures ICMJE||Not Provided|
|Current Other Outcome Measures ICMJE||Not Provided|
|Original Other Outcome Measures ICMJE||Not Provided|
|Brief Title ICMJE||Evaluation of Skin, Colonic, and Oral Microbiome and Effect of Time and Antibiotic Treatment on Organism Diversity at Each Site|
|Official Title ICMJE||Evaluation of Skin, Colonic and Oral Microbiota and Effect of Time and Antibiotic Treatment on Organism Diversity at Each Site|
- To collect a set of study samples from individuals who have applied to participate in a study assessing the relationship among the bacteria H. pylori, peptic ulcer disease, and gastric cancer.
- Individuals between the ages of 21 and 65 who are participating in the clinical trial entitled A Phase III Randomized Trial of Three Antibiotic Regimens to Eradicate Helicobacter Pylori.
The study of infectious agents and their role in disease is not new. Most efforts in this area have focused on specific agents, such as human papillomaviruses and cervical cancer, Helicobacter pylori (HP) and gastric diseases and carcinoma, hepatitis B and C virus and liver cancer, to name a few. The body s skin and mucosal surface s play host to microbial communities (the microbiome) whose membership outnumbers our own somatic and germ cells by an order of magnitude or more. The skin, oral, and gastrointestinal (GI) tract are all densely colonized surfaces . Recent technological advances, however, have made exploration of the microbiome, an understudied area, feasible. It is reasonable to hypothesize that some of the infectious agents that naturally reside in the body may impact health, or that perhaps the balance between the various micro-organisms has an effect on health. This new field of study has much promise that could lead to important new discoveries of how infectious agents are associated with disease and how environmental (e.g., diet) and host responses (e.g., immune response and genetics) to these agents determine chronic patterns of colonization and subsequent disease risk.
However, because the study of the human microbiome is a new area of research, much remains to be learned regarding: a) the extent and pattern of the microbiome at various sites, b) determinants of these patterns (e.g., consistency over time), and c) optimal assay techniques.
Prior to launching large-scale epidemiological studies to evaluate the association between microbiome and disease (including cancer), it is crucial to conduct well-designed, systematic, methodological studies to address some of the issues listed above. These methodological studies will begin to provide the baseline information that could be used to plan for, and conduct disease association studies.
We propose to initiate a study to collect oral, skin, vaginal (only women), penile (men only) and colonic samples at enrollment and again 6 months later on up to 150 individuals. Our objectives are:
|Study Type ICMJE||Observational|
|Study Design ICMJE||Time Perspective: Prospective|
|Target Follow-Up Duration||Not Provided|
|Sampling Method||Not Provided|
|Study Population||Not Provided|
|Intervention ICMJE||Not Provided|
|Study Group/Cohort (s)||Not Provided|
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
|Recruitment Status ICMJE||Completed|
|Estimated Enrollment ICMJE||200|
|Completion Date||Not Provided|
|Primary Completion Date||Not Provided|
|Eligibility Criteria ICMJE||
Individuals who meet the age criteria of 18 years and older and are interested in the study will be asked to provide written informed consent. Participants must be willing to reside in the study area for the study duration (6 months). Those individuals with any known medical conditions that may limit life expectancy in the short term (including but not limited to: congestive heart failure, renal failure, prior malignancy, or any other chronic disease that limits functional status to the extent that the individual cannot perform light work or the usual activities of daily self care) are ineligible for inclusion in the study. Female participants must not be pregnant.
Individuals who report recent antibiotic use will be deferred and enrolled after they have been at least 6 weeks without antibiotic use.
In Hojancha, region of Guanacaste, Costa Rica, where our study will be conducted, a population based census was completed in March 2009 and will serve as the basis for enrollment, allowing for recruitment of a representative sample of the population. The same census was used to identify participants for another study in the same area. Therefore, because we will use the same census, we will exclude participants that were enrolled in the other study. Eligible participants must be willing to return for one follow-up visit: 6 months after the initial enrollment visit and willing to allow submission of blood for assays of serum immune markers, host genetic susceptibility and environmental factors, and to provide consent for use of the specimens.
|Ages||18 Years to 100 Years (Adult, Senior)|
|Accepts Healthy Volunteers||Yes|
|Contacts ICMJE||Contact information is only displayed when the study is recruiting subjects|
|Listed Location Countries ICMJE||Costa Rica|
|Removed Location Countries||United States|
|NCT Number ICMJE||NCT01143571|
|Other Study ID Numbers ICMJE||999910018, 10-C-N018|
|Has Data Monitoring Committee||Not Provided|
|Plan to Share Data||Not Provided|
|IPD Description||Not Provided|
|Responsible Party||National Cancer Institute (NCI)|
|Study Sponsor ICMJE||National Cancer Institute (NCI)|
|Collaborators ICMJE||Not Provided|
|Information Provided By||National Institutes of Health Clinical Center (CC)|
|Verification Date||July 2016|
ICMJE Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP