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Yamamoto Y, Yamamoto T, Miyamoto N, Kinoshita K, Nishikawa S, Adachi T, Takizawa S, Inoue R, Matoba S, Kanamura N. Oral Function and the Oral Microbiome in the Elderly in the Kyotango Area. Dent J (Basel) 2024; 12:16. [PMID: 38248224 PMCID: PMC10814942 DOI: 10.3390/dj12010016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 01/11/2024] [Accepted: 01/16/2024] [Indexed: 01/23/2024] Open
Abstract
INTRODUCTION Prevention of tooth loss contributes to an extended life expectancy, namely longevity. Aging-related oral hypofunction, including tooth loss, markedly increases the risks of functional disorder and mortality. Dysbiosis of the oral microbiome has recently been associated with various diseases, such as liver cirrhosis, pancreatic cancer, colorectal cancer, and inflammatory bowel disease. Therefore, the relationship between the oral microbiome and systemic health has been attracting increasing attention. In the present study, we examined oral function and the oral microbiome in the elderly in a world-leading longevity area. MATERIALS AND METHODS An oral examination, chewing ability/tongue-lip motor function/saliva tests, and a metagenomic analysis with a 16S rRNA gene-targeting next-generation sequencer were conducted on 78 subjects aged ≥80 years. Twenty-six healthy individuals aged between 20 and 39 years were also investigated as controls. The data obtained were statistically analyzed. The protocol of the present study was approved by the Ethics Review Board of our university (ERB-C-885). RESULTS Chewing ability, tongue-lip motor function, and saliva volume were normal in elderly subjects with a current tooth number ≥20, but were significantly lower in those with a current tooth number <20. The oral microbiome in elderly subjects with a current tooth number ≥20 and young controls differed from that in elderly subjects with a current tooth number <20. CONCLUSION Tooth number ≥20 in elderly subjects in the longevity area contributed to the maintenance of both oral function and the diversity of the oral microbiome.
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Affiliation(s)
- Yoshiaki Yamamoto
- Department of Dental Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan; (Y.Y.); (N.M.); (K.K.); (S.N.); (T.A.); (S.T.); (N.K.)
| | - Toshiro Yamamoto
- Department of Dental Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan; (Y.Y.); (N.M.); (K.K.); (S.N.); (T.A.); (S.T.); (N.K.)
| | - Nao Miyamoto
- Department of Dental Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan; (Y.Y.); (N.M.); (K.K.); (S.N.); (T.A.); (S.T.); (N.K.)
| | - Kohei Kinoshita
- Department of Dental Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan; (Y.Y.); (N.M.); (K.K.); (S.N.); (T.A.); (S.T.); (N.K.)
| | - Satomi Nishikawa
- Department of Dental Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan; (Y.Y.); (N.M.); (K.K.); (S.N.); (T.A.); (S.T.); (N.K.)
| | - Tetsuya Adachi
- Department of Dental Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan; (Y.Y.); (N.M.); (K.K.); (S.N.); (T.A.); (S.T.); (N.K.)
| | - Shigeta Takizawa
- Department of Dental Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan; (Y.Y.); (N.M.); (K.K.); (S.N.); (T.A.); (S.T.); (N.K.)
| | - Ryo Inoue
- Laboratory of Animal Science, Department of Applied Biological Sciences, Faculty of Agriculture, Setsunan University, Osaka 572-8508, Japan;
| | - Satoaki Matoba
- Department of Longevity and Regional Epidemiology, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan;
| | - Narisato Kanamura
- Department of Dental Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan; (Y.Y.); (N.M.); (K.K.); (S.N.); (T.A.); (S.T.); (N.K.)
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Chen JF, Hsia KC, Kuo YW, Chen SH, Huang YY, Li CM, Hsu YC, Tsai SY, Ho HH. Safety Assessment and Probiotic Potential Comparison of Bifidobacterium longum subsp. infantis BLI-02, Lactobacillus plantarum LPL28, Lactobacillus acidophilus TYCA06, and Lactobacillus paracasei ET-66. Nutrients 2023; 16:126. [PMID: 38201957 PMCID: PMC10780348 DOI: 10.3390/nu16010126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 12/25/2023] [Accepted: 12/28/2023] [Indexed: 01/12/2024] Open
Abstract
Bifidobacterium longum subsp. infantis BLI-02, Lactobacillus paracasei ET-66, Lactobacillus plantarum LPL28, and Lactobacillus acidophilus TYCA06, isolated from healthy breast milk, miso, and the healthy human gut, were assessed for safety in this study. BLI-02, LPL28, TYCA06, and ET-66 exhibited no antibiotic resistance and mutagenic activity in the Ames test at the highest dosage (5000 μg/plate). No genotoxicity was observed in micronucleus and chromosomal aberration assays in rodent spermatogonia at the maximum dosage of 10 g/kg body weight (BW). No acute and sub-chronic toxicity occurred in mice and rats at the maximum tested dosage of 10 g/kg BW and 1.5 g/kg BW, respectively. The lyophilized powder of these strains survived a low pH and high bile salt environment, adhering strongly to Caco-2 cells. Unique antimicrobial activities were noted in these strains, with BLI-02 demonstrating the best growth inhibition against Vibrio parahaemolyticus, LPL28 exhibiting the best growth inhibition against Helicobacter pylori, and ET-66 showing the best growth inhibition against Aggregatibacter actinomycetemcomitans. Based on the present study, the lyophilized powder of these four strains appears to be a safe probiotic supplement at tested dosages. It should be applicable for clinical or healthcare applications.
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Affiliation(s)
- Jui-Fen Chen
- Research Product Department, R&D Center, Glac Biotech Co., Ltd., Tainan City 744, Taiwan; (J.-F.C.); (K.-C.H.); (Y.-Y.H.); (C.-M.L.); (Y.-C.H.); (S.-Y.T.)
| | - Ko-Chiang Hsia
- Research Product Department, R&D Center, Glac Biotech Co., Ltd., Tainan City 744, Taiwan; (J.-F.C.); (K.-C.H.); (Y.-Y.H.); (C.-M.L.); (Y.-C.H.); (S.-Y.T.)
| | - Yi-Wei Kuo
- Functional Investigation Department, R&D Center, Glac Biotech Co., Ltd., Tainan City 744, Taiwan;
| | - Shu-Hui Chen
- Process Department, R&D Center, Glac Biotech Co., Ltd., Tainan City 744, Taiwan;
| | - Yen-Yu Huang
- Research Product Department, R&D Center, Glac Biotech Co., Ltd., Tainan City 744, Taiwan; (J.-F.C.); (K.-C.H.); (Y.-Y.H.); (C.-M.L.); (Y.-C.H.); (S.-Y.T.)
| | - Ching-Min Li
- Research Product Department, R&D Center, Glac Biotech Co., Ltd., Tainan City 744, Taiwan; (J.-F.C.); (K.-C.H.); (Y.-Y.H.); (C.-M.L.); (Y.-C.H.); (S.-Y.T.)
| | - Yu-Chieh Hsu
- Research Product Department, R&D Center, Glac Biotech Co., Ltd., Tainan City 744, Taiwan; (J.-F.C.); (K.-C.H.); (Y.-Y.H.); (C.-M.L.); (Y.-C.H.); (S.-Y.T.)
| | - Shin-Yu Tsai
- Research Product Department, R&D Center, Glac Biotech Co., Ltd., Tainan City 744, Taiwan; (J.-F.C.); (K.-C.H.); (Y.-Y.H.); (C.-M.L.); (Y.-C.H.); (S.-Y.T.)
| | - Hsieh-Hsun Ho
- Research Product Department, R&D Center, Glac Biotech Co., Ltd., Tainan City 744, Taiwan; (J.-F.C.); (K.-C.H.); (Y.-Y.H.); (C.-M.L.); (Y.-C.H.); (S.-Y.T.)
- Functional Investigation Department, R&D Center, Glac Biotech Co., Ltd., Tainan City 744, Taiwan;
- Process Department, R&D Center, Glac Biotech Co., Ltd., Tainan City 744, Taiwan;
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