Oral microbiome and history of smoking and colorectal cancer
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Study information
-
Quality control
- Retracted paper
- Contamination issues suspected
- Batch effect issues suspected
- Uncontrolled confounding suspected
- Results are suspect (various reasons)
- Tags applied
study design
Citation
PMID PubMed identifier for scientific articles.
DOI Digital object identifier for electronic documents.
URI
Authors
Kato I, Vasquez AA, Moyerbrailean G, Land S, Sun J, Lin HS, Ram JL
Journal
Journal of epidemiological research
Year
2016
Keywords:
Cigarette smoking, Colorectal cancer, Oral microbiome
BACKGROUND: The equilibrium of oral microbiome may be altered by environmental factors, including cigarette smoking. Several recent studies also suggest that oral pathogens causing periodontal disease, such as Fusobacterium nucleatum, are involved in pathogenesis of colorectal cancer. METHODS: For this study oral rinse DNA samples from 190 participants in a population-based case-control study for colorectal cancer were used to amplify a V3-V4 region of bacterial 16S rRNA gene. The amplicons were sequenced using Illumina MiSeq paired end chemistry on two runs, yielding approximately 35 million filtered reads which were assigned to bacterial phyla. RESULTS: No association was found between Fusobacterium abundance or presence and colorectal cancer. However, adjusted for age and experimental batch, colorectal cancer history was associated with increased presence of genus Lactobacillus and increased relative abundance of Rothia by 28% and current smoking was associated with a 33% decrease in relative counts of Betaproteobacteria (primarily Neisseria) and 23% increase in relative abundance of Veillonellaceae family. We also found that smoking had significant effects on the 2nd component scores and 2nd coordinate distances in principal component and coordinate analyses. CONCLUSIONS: It remains to be elucidated whether the observed differences can be translated into biochemical changes in oral environment, thus potentially affecting oral health.
Statistical test
Negative Binomial Regression Zero-Inflated Beta Regression
Experiment 1
Reviewed Marked as Reviewed by Lwaldron on 2023-6-7
Subjects
- Location of subjects
- United States of America
- Host species Species from which microbiome was sampled (if applicable)
- Homo sapiens
- Body site Anatomical site where microbial samples were extracted from according to the Uber Anatomy Ontology
- Saliva Sailva normalis,Saliva atomaris,Saliva molecularis,Salivary gland secretion,Saliva
- Condition The experimental condition / phenotype studied according to the Experimental Factor Ontology
- colorectal cancer cancer of colorectum,cancer of large bowel,cancer of large intestine,cancer of the large bowel,colon cancer,colorectal cancer,colorectum cancer,CRC,large intestine cancer,malignant colorectal neoplasm,malignant colorectal tumor,malignant colorectum neoplasm,malignant large bowel neoplasm,malignant large bowel tumor,malignant large intestine neoplasm,malignant large intestine tumor,malignant neoplasm of colorectum,malignant neoplasm of large bowel,malignant neoplasm of large intestine,malignant neoplasm of the large bowel,malignant neoplasm of the large intestine,malignant tumor of large bowel,malignant tumor of large intestine,malignant tumor of the large bowel,malignant tumor of the large intestine
- Group 0 name Corresponds to the control (unexposed) group for case-control studies
- Healthy Controls(HC)
- Group 1 name Corresponds to the case (exposed) group for case-control studies
- Colorectal cancer
- Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group
- colorectal cancer; 24% of the colorectal cancer cases were current smokers. 16% habitual alcohol drinkers
- Group 0 sample size Number of subjects in the control (unexposed) group
- 122
- Group 1 sample size Number of subjects in the case (exposed) group
- 68
- Antibiotics exclusion Number of days without antibiotics usage (if applicable) and other antibiotics-related criteria used to exclude participants (if any)
- None specified
Lab analysis
- Sequencing type
- 16S
- 16S variable region One or more hypervariable region(s) of the bacterial 16S gene
- V3-V4
- Sequencing platform Manufacturer and experimental platform used for quantifying microbial abundance
- Illumina
Statistical Analysis
- Data transformation Data transformation applied to microbial abundance measurements prior to differential abundance testing (if any).
- relative abundances
- Significance threshold p-value or FDR threshold used for differential abundance testing (if any)
- 0.05
- Matched on Factors on which subjects have been matched on in a case-control study
- race, region of residence, sex
- Confounders controlled for Confounding factors that have been accounted for by stratification or model adjustment
- age, smoking status
Alpha Diversity
- Shannon Estimator of species richness and species evenness: more weight on species richness
- unchanged
- Chao1 Abundance-based estimator of species richness
- unchanged
- Simpson Estimator of species richness and species evenness: more weight on species evenness
- unchanged
- Richness Number of species
- unchanged
Signature 1
Reviewed Marked as Reviewed by Lwaldron on 2023-6-7
Source: Table 3
Description: The effects** and 95% confidence intervals (in parenthesis) of age, cancer history and current smoking on relative bacterial count at each taxonomic level based on negative binomial models
Abundance in Group 1: increased abundance in Colorectal cancer
| NCBI | Quality Control | Links |
|---|---|---|
| Actinomycetales | ||
| Actinomycetota | ||
| Bacilli | ||
| Lactobacillaceae | ||
| Lactobacillales | ||
| Lactobacillus | ||
| Micrococcaceae | ||
| Rothia | ||
| Rothia mucilaginosa | ||
| Bacillota |
Revision editor(s): Aiyshaaaa
Signature 2
Reviewed Marked as Reviewed by Lwaldron on 2023-6-7
Source: Table 3
Description: The effects** and 95% confidence intervals (in parenthesis) of age, cancer history and current smoking on relative bacterial count at each taxonomic level based on negative binomial models
Abundance in Group 1: decreased abundance in Colorectal cancer
| NCBI | Quality Control | Links |
|---|---|---|
| Pseudomonadota | ||
| Bacteroidia | ||
| Fusobacteriia |
Revision editor(s): Aiyshaaaa
Experiment 3
Reviewed Marked as Reviewed by Lwaldron on 2023-6-7
Differences from previous experiment shown
Subjects
- Group 0 name Corresponds to the control (unexposed) group for case-control studies
- Young
- Group 1 name Corresponds to the case (exposed) group for case-control studies
- Old (≥ 65 yrs)
- Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group
- “Advanced age” was defined as 65 years or older.
- Group 0 sample size Number of subjects in the control (unexposed) group
- 103
- Group 1 sample size Number of subjects in the case (exposed) group
- 87
Lab analysis
Statistical Analysis
Alpha Diversity
- Shannon Estimator of species richness and species evenness: more weight on species richness
- unchanged
- Chao1 Abundance-based estimator of species richness
- unchanged
- Simpson Estimator of species richness and species evenness: more weight on species evenness
- unchanged
- Richness Number of species
- unchanged
Signature 1
Reviewed Marked as Reviewed by Lwaldron on 2023-6-7
Source: Table 3
Description: The effects** and 95% confidence intervals (in parenthesis) of age, cancer history and current smoking on relative bacterial count at each taxonomic level based on negative binomial models
Abundance in Group 1: increased abundance in Old (≥ 65 yrs)
| NCBI | Quality Control | Links |
|---|---|---|
| Porphyromonas gingivalis | ||
| Streptococcus gordonii | ||
| Bacillota | ||
| Bacilli | ||
| Lactobacillales | ||
| Streptococcaceae | ||
| Streptococcus |
Signature 2
Reviewed Marked as Reviewed by Lwaldron on 2023-6-7
Source: Table 3
Description: The effects** and 95% confidence intervals (in parenthesis) of age, cancer history and current smoking on relative bacterial count at each taxonomic level based on negative binomial models
Abundance in Group 1: decreased abundance in Old (≥ 65 yrs)
| NCBI | Quality Control | Links |
|---|---|---|
| Bacteroidia | ||
| Bacteroidales | ||
| Porphyromonadaceae | ||
| Porphyromonas | ||
| Actinomycetales | ||
| Micrococcaceae | ||
| Rothia | ||
| Rothia mucilaginosa | ||
| Actinomycetota | ||
| Pseudomonadota | ||
| Fusobacteriia |
Revision editor(s): Aiyshaaaa
Experiment 4
Reviewed Marked as Reviewed by Lwaldron on 2023-6-7
Differences from previous experiment shown
Subjects
- Group 0 name Corresponds to the control (unexposed) group for case-control studies
- Non Smokers
- Group 1 name Corresponds to the case (exposed) group for case-control studies
- Current Smokers
- Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group
- Current smokers, where defined as ever smokers who smoked at least one cigarette per day for six months or longer and were smoking within 2 year prior to interview.
- Group 0 sample size Number of subjects in the control (unexposed) group
- 138
- Group 1 sample size Number of subjects in the case (exposed) group
- 52
Lab analysis
Statistical Analysis
- Matched on Factors on which subjects have been matched on in a case-control study
- region of residence, race, sex
Alpha Diversity
- Shannon Estimator of species richness and species evenness: more weight on species richness
- unchanged
- Chao1 Abundance-based estimator of species richness
- unchanged
- Simpson Estimator of species richness and species evenness: more weight on species evenness
- unchanged
- Richness Number of species
- unchanged
Signature 1
Reviewed Marked as Reviewed by Lwaldron on 2023-6-7
Source: Table 3
Description: The effects** and 95% confidence intervals (in parenthesis) of age, cancer history and current smoking on relative bacterial count at each taxonomic level based on negative binomial models
Abundance in Group 1: increased abundance in Current Smokers
| NCBI | Quality Control | Links |
|---|---|---|
| Bacillota | ||
| Clostridia | ||
| Clostridiales bacterium | ||
| Veillonellaceae | ||
| Veillonella | ||
| Veillonella atypica | ||
| Bacteroidia | ||
| Actinomycetota |
Signature 2
Reviewed Marked as Reviewed by Lwaldron on 2023-6-7
Source: Table 3
Description: The effects** and 95% confidence intervals (in parenthesis) of age, cancer history and current smoking on relative bacterial count at each taxonomic level based on negative binomial models
Abundance in Group 1: decreased abundance in Current Smokers
| NCBI | Quality Control | Links |
|---|---|---|
| Pseudomonadota | ||
| Betaproteobacteria | ||
| Neisseriales | ||
| Neisseriaceae | ||
| Neisseria | ||
| Neisseria mucosa | ||
| Fusobacteriia |
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