151
|
Bayır E, Bilgi E, Şendemir-Ürkmez A, Hameş-Kocabaş EE. The effects of different intensities, frequencies and exposure times of extremely low-frequency electromagnetic fields on the growth of Staphylococcus aureus and Escherichia coli O157:H7. Electromagn Biol Med 2013; 34:14-8. [PMID: 24279632 DOI: 10.3109/15368378.2013.853671] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The impact of different types of extremely low-frequency electromagnetic fields (ELF-EMF) on the growth of Staphylococcus aureus and Escherichia coli O157:H7 was investigated. The cultures of bacteria in broth media were exposed to sinusoidal homogenous ELF-EMF with 2 and 4 mT magnetic intensities. Each intensity for each bacteria was combined with three different frequencies (20, 40 and 50 Hz), and four different exposure times (1, 2, 4 and 6 h). A cell suspension of each experiment was diluted for the appropriate range and inoculated to Mueller-Hinton Agar (MHA) plates after exposure to ELF-EMF. The number of colony forming units (CFU) of both strains was obtained after incubation at 37 °C for 24 h. Data were statistically evaluated by one-way analysis of variance (ANOVA), statistical significance was described at p < 0.05 and data were compared with their non-exposed controls. Magnetic intensity, frequency and exposure time of ELF-EMFs changed the characteristic responses for both microorganisms. Samples exposed to ELF-EMF showed a statistically significant decrease compared to their controls in colony forming capability, especially at long exposure times. An exposure to 4 mT-20 Hz ELF-EMF of 6 h produced maximum inhibition of CFU compared to their controls for both microorganisms (95.2% for S. aureus and 85% for E. coli).
Collapse
Affiliation(s)
- Ece Bayır
- Department of Biomedical Technologies, Graduate School of Natural and Applied Sciences and
| | | | | | | |
Collapse
|
152
|
Klemashevich C, Wu C, Howsmon D, Alaniz RC, Lee K, Jayaraman A. Rational identification of diet-derived postbiotics for improving intestinal microbiota function. Curr Opin Biotechnol 2013; 26:85-90. [PMID: 24679263 DOI: 10.1016/j.copbio.2013.10.006] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Revised: 09/06/2013] [Accepted: 10/04/2013] [Indexed: 01/19/2023]
Abstract
The intestinal microbiota plays an important role in a wide range of functions and whole body homeostasis. Recent advances have linked microbiota dysbiosis to conditions ranging from Crohn's disease to cancer. The restoration or strengthening of the intestinal microbiota through diet-based approaches such as probiotics and prebiotics has been proposed for combating the onset or progression of these diseases. In this review, we highlight the importance of postbiotics for the manipulation of the intestinal microbiota, with special emphasis on systems biology computational tools and targeted metabolomics for the rational discovery and identification of these bioactive molecules. The identification of novel postbiotics and the pathways responsible for their production should lead to improved mechanistic understanding of the role that specific probiotics, prebiotics, and postbiotics have in restoring intestinal microbiota composition and function.
Collapse
Affiliation(s)
- Cory Klemashevich
- Department of Chemical Engineering, Texas A&M University, College Station, TX, United States
| | - Charmian Wu
- Department of Chemical and Biological Engineering, Tufts University, Medford, MA, United States
| | - Daniel Howsmon
- Department of Chemical Engineering, Texas A&M University, College Station, TX, United States
| | - Robert C Alaniz
- Department of Microbial and Molecular Pathogenesis, Texas A&M University Health Science Center, College Station, TX, United States
| | - Kyongbum Lee
- Department of Chemical and Biological Engineering, Tufts University, Medford, MA, United States
| | - Arul Jayaraman
- Department of Chemical Engineering, Texas A&M University, College Station, TX, United States; Department of Microbial and Molecular Pathogenesis, Texas A&M University Health Science Center, College Station, TX, United States.
| |
Collapse
|
153
|
Musculoskeletal system in the old age and the demand for healthy ageing biomarkers. Mech Ageing Dev 2013; 134:541-7. [DOI: 10.1016/j.mad.2013.11.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2013] [Revised: 10/24/2013] [Accepted: 11/11/2013] [Indexed: 12/19/2022]
|
154
|
Guglielmetti S, Fracassetti D, Taverniti V, Del Bo' C, Vendrame S, Klimis-Zacas D, Arioli S, Riso P, Porrini M. Differential modulation of human intestinal bifidobacterium populations after consumption of a wild blueberry (Vaccinium angustifolium) drink. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:8134-8140. [PMID: 23883473 DOI: 10.1021/jf402495k] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Bifidobacteria are gaining increasing interest as health-promoting bacteria. Nonetheless, the genus comprises several species, which can exert different effects on human host. Previous studies showed that wild blueberry drink consumption could selectively increase intestinal bifidobacteria, suggesting an important role for the polyphenols and fiber present in wild blueberries. This study evaluated the modulation of the most common and abundant bifidobacterial taxonomic groups inhabiting the human gut in the same fecal samples. The analyses carried out showed that B. adolescentis, B. breve, B. catenulatum/pseudocatelulatum, and B. longum subsp. longum were always present in the group of subjects enrolled, whereas B. bifidum and B. longum subsp. infantis were not. Furthermore, it was found that the most predominant bifidobacterial species were B. longum subsp. longum and B. adolescentis. The results obtained revealed a high interindividual variability; however, a significant increase of B. longum subsp. infantis cell concentration was observed in the feces of volunteers after the wild blueberry drink treatment. This bifidobacterial group was shown to possess immunomodulatory abilities and to relieve symptoms and promote the regression of several gastrointestinal disorders. Thus, an increased cell concentration of B. longum subsp. infantis in the human gut could be considered of potential health benefit. In conclusion, wild blueberry consumption resulted in a specific bifidogenic effect that could positively affect certain populations of bifidobacteria with demonstrated health-promoting properties.
Collapse
Affiliation(s)
- Simone Guglielmetti
- Department of Food, Environmental and Nutritional Sciences (DeFENS), Division of Food Microbiology and Bioprocessing, Università degli Studi di Milano, Via Celoria 2, 20133 Milano, Italy.
| | | | | | | | | | | | | | | | | |
Collapse
|
155
|
Lewis DA, Brown R, Williams J, White P, Jacobson SK, Marchesi JR, Drake MJ. The human urinary microbiome; bacterial DNA in voided urine of asymptomatic adults. Front Cell Infect Microbiol 2013; 3:41. [PMID: 23967406 PMCID: PMC3744036 DOI: 10.3389/fcimb.2013.00041] [Citation(s) in RCA: 240] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2013] [Accepted: 07/25/2013] [Indexed: 12/14/2022] Open
Abstract
The urinary microbiome of healthy individuals and the way it alters with ageing have not been characterized and may influence disease processes. Conventional microbiological methods have limited scope to capture the full spectrum of urinary bacterial species. We studied the urinary microbiota from a population of healthy individuals, ranging from 26 to 90 years of age, by amplification of the 16S rRNA gene, with resulting amplicons analyzed by 454 pyrosequencing. Mid-stream urine (MSU) was collected by the “clean-catch” method. Quantitative PCR of 16S rRNA genes in urine samples, allowed relative enumeration of the bacterial loads. Analysis of the samples indicates that females had a more heterogeneous mix of bacterial genera compared to the male samples and generally had representative members of the phyla Actinobacteria and Bacteroidetes. Analysis of the data leads us to conclude that a “core” urinary microbiome could potentially exist, when samples are grouped by age with fluctuation in abundance between age groups. The study also revealed age-specific genera Jonquetella, Parvimonas, Proteiniphilum, and Saccharofermentans. In conclusion, conventional microbiological methods are inadequate to fully identify around two-thirds of the bacteria identified in this study. Whilst this proof-of-principle study has limitations due to the sample size, the discoveries evident in this sample data are strongly suggestive that a larger study on the urinary microbiome should be encouraged and that the identification of specific genera at particular ages may be relevant to pathogenesis of clinical conditions.
Collapse
Affiliation(s)
- Debbie A Lewis
- Department of Engineering Design and Mathematics, University of the West of England Bristol, UK
| | | | | | | | | | | | | |
Collapse
|
156
|
Abstract
The human intestine is colonised by 10¹³ to 10¹⁴ micro-organisms, the vast majority of which belong to the phyla Firmicutes and Bacteroidetes. Although highly stable over time, the composition and activities of the microbiota may be influenced by a number of factors including age, diet and antibiotic treatment. Although perturbations in the composition or functions of the microbiota are linked to inflammatory and metabolic disorders (e.g. inflammatory bowel diseases, irritable bowel syndrome and obesity), it is unclear at this point whether these changes are a symptom of the disease or a contributing factor. A better knowledge of the mechanisms through which changes in microbiota composition (dysbiosis) promote disease states is needed to improve our understanding of the causal relationship between the gut microbiota and disease. While evidence of the preventive and therapeutic effects of probiotic strains on diarrhoeal illness and other intestinal conditions is promising, the exact mechanisms of the beneficial effects are not fully understood. Recent studies have raised the question of whether non-viable probiotic strains can confer health benefits on the host by influencing the immune system. As the potential health effect of these non-viable bacteria depends on whether the mechanism of this effect is dependent on viability, future research needs to consider each probiotic strain on a case-by-case basis. The present review provides a comprehensive, updated overview of the human gut microbiota, the factors influencing its composition and the role of probiotics as a therapeutic modality in the treatment and prevention of diseases and/or restoration of human health.
Collapse
|
157
|
Magrone T, Jirillo E. The interaction between gut microbiota and age-related changes in immune function and inflammation. IMMUNITY & AGEING 2013; 10:31. [PMID: 23915308 PMCID: PMC3848811 DOI: 10.1186/1742-4933-10-31] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2012] [Accepted: 05/10/2013] [Indexed: 02/07/2023]
Abstract
Intestinal microbiota and gut immune systems interact each other, maintaining a condition of homeostasis in the context of the intestinal habitat. However, both systems undergo modifications in elderly, thus accounting for a low grade inflammatory status which, in turn, may evolve toward more severe pathological conditions such as inflammatory bowel disease and colon rectal cancer. In addition, in western societies dietary habits may negatively influence the microbiota composition, also altering gut immune response which is per se impaired in elderly. In order to prevent the outcome of aged-related disease, supplementation of nutraceuticals able to correct abnormalities of both immune system and microbiota has become more frequent than in the past. In this respect, a better identification of components of the aged microbiota as well as a deeper analysis of gut mucosal immunity function should be pursued.
Collapse
Affiliation(s)
- Thea Magrone
- Department of Basic Medical Sciences, Neuroscience and Sensory Organs, University of Bari, Policlinico, Piazza G, Cesare 11, 70124, Bari, Italy.
| | | |
Collapse
|
158
|
|
159
|
Tran L, Greenwood-Van Meerveld B. Age-associated remodeling of the intestinal epithelial barrier. J Gerontol A Biol Sci Med Sci 2013; 68:1045-56. [PMID: 23873964 DOI: 10.1093/gerona/glt106] [Citation(s) in RCA: 200] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Disorders of the gastrointestinal tract are common in the elderly people; however, the precise trait(s) of aging that contribute to the vulnerability of the gastrointestinal tract are poorly understood. Recent evidence suggests that patients with gastrointestinal disorders have increased intestinal permeability. Here, we address the hypothesis that disruption of the intestinal barrier is associated with aging. Our results demonstrated that permeability was significantly higher in colonic biopsies collected from old baboons compared with young baboons. Additionally, colonic tissue from the older animals had decreased zonula occluden-1, occludin, and junctional adhesion molecule-A tight junction protein expression and increased claudin-2 expression. Upregulation of miR-29a and inflammatory cytokines IFN-γ, IL-6, and IL-1β was also found in colonic biopsies from old baboons relative to young baboons. These results show for the first time that a pivotal contributing factor to geriatric vulnerability to gastrointestinal dysfunction may be increased colonic permeability via age-associated remodeling of intestinal epithelial tight junction proteins.
Collapse
Affiliation(s)
- Lee Tran
- Oklahoma Center for Neuroscience, University of Oklahoma Health Science Center, Oklahoma City, OK73104, USA
| | | |
Collapse
|
160
|
Swann JR, Spagou K, Lewis M, Nicholson JK, Glei DA, Seeman TE, Coe CL, Goldman N, Ryff CD, Weinstein M, Holmes E. Microbial-mammalian cometabolites dominate the age-associated urinary metabolic phenotype in Taiwanese and American populations. J Proteome Res 2013; 12:3166-80. [PMID: 23701591 DOI: 10.1021/pr4000152] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Understanding the metabolic processes associated with aging is key to developing effective management and treatment strategies for age-related diseases. We investigated the metabolic profiles associated with age in a Taiwanese and an American population. ¹H NMR spectral profiles were generated for urine specimens collected from the Taiwanese Social Environment and Biomarkers of Aging Study (SEBAS; n = 857; age 54-91 years) and the Mid-Life in the USA study (MIDUS II; n = 1148; age 35-86 years). Multivariate and univariate linear projection methods revealed some common age-related characteristics in urinary metabolite profiles in the American and Taiwanese populations, as well as some distinctive features. In both cases, two metabolites--4-cresyl sulfate (4CS) and phenylacetylglutamine (PAG)--were positively associated with age. In addition, creatine and β-hydroxy-β-methylbutyrate (HMB) were negatively correlated with age in both populations (p < 4 × 10⁻⁶). These age-associated gradients in creatine and HMB reflect decreasing muscle mass with age. The systematic increase in PAG and 4CS was confirmed using ultraperformance liquid chromatography-mass spectrometry (UPLC-MS). Both are products of concerted microbial-mammalian host cometabolism and indicate an age-related association with the balance of host-microbiome metabolism.
Collapse
Affiliation(s)
- Jonathan R Swann
- Department of Food and Nutritional Sciences, School of Chemistry, Food and Pharmacy, University of Reading, Whiteknights, Reading RG6 6AP, United Kingdom
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
161
|
Sivieri K, Morales MLV, Adorno MAT, Sakamoto IK, Saad SMI, Rossi EA. Lactobacillus acidophilus CRL 1014 improved "gut health" in the SHIME reactor. BMC Gastroenterol 2013; 13:100. [PMID: 23758634 PMCID: PMC3700768 DOI: 10.1186/1471-230x-13-100] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Accepted: 06/07/2013] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND How to maintain "gut health" is a goal for scientists throughout the world. Therefore, microbiota management models for testing probiotics, prebiotics, and synbiotics have been developed. METHODS The SHIME model was used to study the effect of Lactobacillus acidophilus 1014 on the fermentation pattern of the colon microbiota. Initially, an inoculum prepared from human feces was introduced into the reactor vessels and stabilized over 2-wk using a culture medium. This stabilization period was followed by a 2-wk control period during which the microbiota was monitored. The microbiota was then subjected to a 4-wk treatment period by adding 5 mL of sterile peptone water with L. acidophilus CRL1014 at the concentration of 10⁸ CFU/mL to vessel one (the stomach compartment). Plate counts, Denaturing Gradient Gel Electrophoresis (DGGE), short-chain fatty acid (SCFA) and ammonium analyses were carried out for monitoring of the microbial community from the colon compartments. RESULTS A significant increase (p < 0.01) in the Lactobacillus spp. and Bifidobacterium spp. populations was observed during the treatment period. The DGGE obtained showed changes in the lactobacilli community from the colon compartments of the SHIME reactor. The (SCFA) concentration increased (p < 0.01) during the treatment period, due mainly to significant increased levels of acetic, butyric, and propionic acids. However, ammonium concentrations decreased during the same period (p < 0.01). CONCLUSIONS This study showed the beneficial influence of L. acidophilus CRL 1014 on microbial metabolism and lactobacilli community composition for improving human health.
Collapse
Affiliation(s)
- Katia Sivieri
- Department of Food & Nutrition, Faculty of Pharmaceutical Sciences, São Paulo State University, Araraquara Jau Highway, Km1, Araraquara, SP, Brazil
| | - Martha L Villarreal Morales
- University of São Paulo, Faculty of Pharmaceutical Sciences, 580, Prof. Lineu Prestes Av, São Paulo, SP 05508-000, Brazil
| | | | | | - Susana M Isay Saad
- University of São Paulo, Faculty of Pharmaceutical Sciences, 580, Prof. Lineu Prestes Av, São Paulo, SP 05508-000, Brazil
| | - Elizeu A Rossi
- Department of Food & Nutrition, Faculty of Pharmaceutical Sciences, São Paulo State University, Araraquara Jau Highway, Km1, Araraquara, SP, Brazil
| |
Collapse
|
162
|
Valentini Neto J, de Melo CM, Lima Ribeiro SM. Effects of three-month intake of synbiotic on inflammation and body composition in the elderly: a pilot study. Nutrients 2013; 5:1276-86. [PMID: 23595135 PMCID: PMC3705347 DOI: 10.3390/nu5041276] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2013] [Revised: 02/25/2013] [Accepted: 03/25/2013] [Indexed: 12/28/2022] Open
Abstract
We hypothesize that improvements in the gut microbiota are capable of ameliorating gut permeability and, consequently, reducing systemic inflammation and the risk of frailty. This study aims to evaluate some effects of synbiotic supplementation on inflammatory markers and the body composition of the elderly at risk of frailty. In a double-blind study that lasted three months, 17 elderly individuals fulfilling one frailty criteria (grip strength) were randomly distributed into two groups: SYN (n = 9), daily intake of synbiotic (6 g Frutooligossacarides, 108 to 109 CFU Lactobacillus paracasei, 108 to 109 CFU Lactobacillus rhamnosus, 108 to 109 CFU Lactobacillus acidophilus and 108 to 109 CFU Bifidobacterium lactis), or placebo (maltodextrin; PLA; n = 8). Subjects were analyzed for anthropometric measurements, bioelectric impedance with vectorial analysis (BIVA), IL-6 and TNF-α. A comparison between groups did not show any difference for the variables investigated. In turn, individual analysis of electrical impedance (BIVA) demonstrated that the majority of SYN individuals maintained or improved their tissue hydration, when compared to the PLA group after supplementation. In conclusion, three months of synbiotic supplementation did not promote any significant changes in inflammatory cytokines or body composition, but demonstrated a trend towards a preservation of hydration status in apparently healthy elderly individuals.
Collapse
Affiliation(s)
- João Valentini Neto
- School of Arts, Sciences and Humanities, University of São Paulo, São Paulo, CEP 03828-000, Brazil; E-Mail:
| | | | - Sandra Maria Lima Ribeiro
- School of Arts, Sciences and Humanities, University of São Paulo, São Paulo, CEP 03828-000, Brazil; E-Mail:
| |
Collapse
|
163
|
Saffrey MJ. Cellular changes in the enteric nervous system during ageing. Dev Biol 2013; 382:344-55. [PMID: 23537898 DOI: 10.1016/j.ydbio.2013.03.015] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2012] [Revised: 02/22/2013] [Accepted: 03/19/2013] [Indexed: 02/06/2023]
Abstract
The intrinsic neurons of the gut, enteric neurons, have an essential role in gastrointestinal functions. The enteric nervous system is plastic and continues to undergo changes throughout life, as the gut grows and responds to dietary and other environmental changes. Detailed analysis of changes in the ENS during ageing suggests that enteric neurons are more vulnerable to age-related degeneration and cell death than neurons in other parts of the nervous system, although there is considerable variation in the extent and time course of age-related enteric neuronal loss reported in different studies. Specific neuronal subpopulations, particularly cholinergic myenteric neurons, may be more vulnerable than others to age-associated loss or damage. Enteric degeneration and other age-related neuronal changes may contribute to gastrointestinal dysfunction that is common in the elderly population. Evidence suggests that caloric restriction protects against age-associated loss of enteric neurons, but recent advances in the understanding of the effects of the microbiota and the complex interactions between enteric ganglion cells, mucosal immune system and intestinal epithelium indicate that other factors may well influence ageing of enteric neurons. Much remains to be understood about the mechanisms of neuronal loss and damage in the gut, although there is evidence that reactive oxygen species, neurotrophic factor dysregulation and/or activation of a senescence associated phenotype may be involved. To date, there is no evidence for ongoing neurogenesis that might replace dying neurons in the ageing gut, although small local sites of neurogenesis would be difficult to detect. Finally, despite the considerable evidence for enteric neurodegeneration during ageing, and evidence for some physiological changes in animal models, the ageing gut appears to maintain its function remarkably well in animals that exhibit major neuronal loss, indicating that the ENS has considerable functional reserve.
Collapse
Affiliation(s)
- M Jill Saffrey
- Department Life, Health & Chemical Sciences, Open University, Walton Hall, Milton Keynes MK7 6AA, United Kingdom.
| |
Collapse
|
164
|
Duncan SH, Flint HJ. Probiotics and prebiotics and health in ageing populations. Maturitas 2013; 75:44-50. [PMID: 23489554 DOI: 10.1016/j.maturitas.2013.02.004] [Citation(s) in RCA: 116] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2013] [Accepted: 02/15/2013] [Indexed: 02/08/2023]
Abstract
In healthy adults microbial communities that colonise different regions of the human colon contribute nutrients and energy to the host via the fermentation of non-digestible dietary components in the large intestine. A delicate balance of microbial species is required to maintain healthy metabolism and immune function. Disturbance in this microbial balance can have negative consequences for health resulting in elevated inflammation and infection, that are contributory factors in diabetes and cancer. There is a growing awareness that the microbial balance in the colon may become increasingly perturbed with aging and therefore hasten the onset of certain diseases. Societal and dietary factors influence microbial community composition both in the short and long term in the elderly (>65 years old) whilst immunosenescence may also be linked to a perturbed distal gut microbiota and frailty in the elderly. Significant progress has been made in defining some of the dominant members of the microbial community in the healthy large intestine and in identifying their roles in metabolism. There is therefore an urgent need for better awareness of the impact of diet, prebiotic and probiotic strategies in driving human colonic microbial composition in order to understand the possibilities for maintaining healthy gut function and well-being in an increasingly elderly population. Here we review gut microbial changes associated with aging and how diet, prebiotics and probiotics may modulate the gut microbiota to maintain health in the elderly.
Collapse
Affiliation(s)
- Sylvia H Duncan
- Microbial Ecology Group, Rowett Institute of Nutrition and Health, Greenburn Road, Bucksburn, Aberdeen, Scotland, UK.
| | | |
Collapse
|
165
|
Biagi E, Candela M, Turroni S, Garagnani P, Franceschi C, Brigidi P. Ageing and gut microbes: perspectives for health maintenance and longevity. Pharmacol Res 2013; 69:11-20. [PMID: 23079287 DOI: 10.1016/j.phrs.2012.10.005] [Citation(s) in RCA: 160] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2012] [Revised: 10/01/2012] [Accepted: 10/06/2012] [Indexed: 12/13/2022]
Abstract
The ageing process affects the human gut microbiota phylogenetic composition and its interaction with the immune system. Age-related gut microbiota modifications are associated with immunosenescence and inflamm-ageing in a sort of self-sustaining loop, which allows the placement of gut microbiota unbalances among both the causes and the effects of the inflamm-ageing process. Even if, up to now, the link between gut microbiota and the ageing process is only partially understood, the gut ecosystem shows the potential to become a promising target for strategies able to contribute to the health status of older people. In this context, the consumption of pro/prebiotics may be useful in both prevention and treatment of age-related pathophysiological conditions, such as recovery and promotion of immune functions, i.e. adjuvant effect for influenza vaccine, and prevention and/or alleviation of common "winter diseases", as well as constipation and Clostridium difficile-associated diarrhoea. Moreover, being involved in different mechanisms which concur in counteracting inflammation, such as down-regulation of inflammation-associated genes and improvement of colonic mucosa conditions, probiotics have the potentiality to be involved in the promotion of longevity.
Collapse
Affiliation(s)
- Elena Biagi
- Department of Pharmaceutical Sciences, University of Bologna, Via Belmeloro 6, 40126, Bologna, Italy
| | | | | | | | | | | |
Collapse
|
166
|
Rampelli S, Candela M, Severgnini M, Biagi E, Turroni S, Roselli M, Carnevali P, Donini L, Brigidi P. A probiotics-containing biscuit modulates the intestinal microbiota in the elderly. J Nutr Health Aging 2013; 17:166-72. [PMID: 23364497 DOI: 10.1007/s12603-012-0372-x] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
OBJECTIVES Evaluation of the impact of a biscuit containing the probiotics Bifidobacterium longum Bar33 and Lactobacillus helveticus Bar13 on the intestinal microbiota in the elderly. DESIGN Randomized double-blind placebo-controlled trial. PARTICIPANTS Thirty-two elderly volunteers living in Italy. The group was composed of 19 women and 13 men aged between 71 and 88 years (mean 76). INTERVENTION Subjects were randomized in two groups consuming one dose of the probiotics-containing biscuit or placebo once a day for 30 days. MEASUREMENTS For each subject the intestinal microbiota was characterized using the phylogenetic microarray platform HTF-Microbi.Array before and after intervention. RESULTS Our data demonstrated that one-month consumption of a probiotics-containing biscuit was effective in redressing some of the age-related dysbioses of the intestinal microbiota. In particular, the probiotic treatment reverted the age-related increase of the opportunistic pathogens Clostridium cluster XI, Clostridium difficile, Clostridium perfringens, Enterococcus faecium and the enteropathogenic genus Campylobacter. CONCLUSION The present study opens the way to the development of elderly-tailored probiotic-based functional foods to counteract the age-related dysbioses of the intestinal microbiota.
Collapse
Affiliation(s)
- S Rampelli
- Department of Pharmaceutical Sciences, University of Bologna, Bologna, Italy
| | | | | | | | | | | | | | | | | |
Collapse
|
167
|
Jeffery IB, O’Toole PW. Diet-microbiota interactions and their implications for healthy living. Nutrients 2013; 5:234-52. [PMID: 23344252 PMCID: PMC3571646 DOI: 10.3390/nu5010234] [Citation(s) in RCA: 130] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Revised: 01/10/2013] [Accepted: 01/10/2013] [Indexed: 02/06/2023] Open
Abstract
It is well established that diet influences the health of an individual and that a diet rich in plant-based foods has many advantages in relation to the health and well-being of an individual. What has been unclear until recently is the large contribution of the gut microbiota to this effect. As well as providing basic nutritional requirements, the long-term diet of an animal modifies its gut microbiota. In adults, diets that have a high proportion of fruit and vegetables and a low consumption of meat are associated with a highly diverse microbiota and are defined by a greater abundance of Prevotella compared to Bacteroides, while the reverse is associated with a diet that contains a low proportion of plant-based foods. Furthermore, it is becoming increasingly clear that the effect of the microbial ecology of the gut goes beyond the local gut immune system and is implicated in immune-related disorders, such as IBS, diabetes and inflamm-ageing. In this review, we investigate the evidence that a balanced diet leads to a balanced, diverse microbiota with significant consequences for healthy ageing by focusing on conditions of interest.
Collapse
Affiliation(s)
- Ian B. Jeffery
- Department of Microbiology, University College Cork, College Road, Cork, Ireland; E-Mail:
- Alimentary Pharmabiotic Centre, University College Cork, College Road, Cork, Ireland
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +353-(0)21-490-1306; Fax: +353-(0)21-490-3997
| | - Paul W. O’Toole
- Department of Microbiology, University College Cork, College Road, Cork, Ireland; E-Mail:
- Alimentary Pharmabiotic Centre, University College Cork, College Road, Cork, Ireland
| |
Collapse
|
168
|
Lappi J, Kolehmainen M, Mykkänen H, Poutanen K. Do Large Intestinal Events Explain the Protective Effects of Whole Grain Foods Against Type 2 Diabetes? Crit Rev Food Sci Nutr 2013; 53:631-40. [DOI: 10.1080/10408398.2010.550388] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
|
169
|
Ramírez-Puebla ST, Servín-Garcidueñas LE, Jiménez-Marín B, Bolaños LM, Rosenblueth M, Martínez J, Rogel MA, Ormeño-Orrillo E, Martínez-Romero E. Gut and root microbiota commonalities. Appl Environ Microbiol 2013; 79:2-9. [PMID: 23104406 PMCID: PMC3536091 DOI: 10.1128/aem.02553-12] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Animal guts and plant roots have absorption roles for nutrient uptake and converge in harboring large, complex, and dynamic groups of microbes that participate in degradation or modification of nutrients and other substances. Gut and root bacteria regulate host gene expression, provide metabolic capabilities, essential nutrients, and protection against pathogens, and seem to share evolutionary trends.
Collapse
|
170
|
Santini MSS, Koga EC, Aragon DC, Santana EHW, Costa MR, Costa GN, Aragon-Alegro LC. Dried Tomato-Flavored Probiotic Cream Cheese withLactobacillus paracasei. J Food Sci 2012; 77:M604-8. [DOI: 10.1111/j.1750-3841.2012.02931.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
|
171
|
Bäckhed F, Fraser C, Ringel Y, Sanders M, Sartor R, Sherman P, Versalovic J, Young V, Finlay B. Defining a Healthy Human Gut Microbiome: Current Concepts, Future Directions, and Clinical Applications. Cell Host Microbe 2012; 12:611-22. [DOI: 10.1016/j.chom.2012.10.012] [Citation(s) in RCA: 477] [Impact Index Per Article: 39.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
172
|
Dowhower Karpa K, Paul IM, Leckie JA, Shung S, Carkaci-Salli N, Vrana KE, Mauger D, Fausnight T, Poger J. A retrospective chart review to identify perinatal factors associated with food allergies. Nutr J 2012; 11:87. [PMID: 23078601 PMCID: PMC3493351 DOI: 10.1186/1475-2891-11-87] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2012] [Accepted: 10/16/2012] [Indexed: 01/22/2023] Open
Abstract
Background Gut flora are important immunomodulators that may be disrupted in individuals with atopic conditions. Probiotic bacteria have been suggested as therapeutic modalities to mitigate or prevent food allergic manifestations. We wished to investigate whether perinatal factors known to disrupt gut flora increase the risk of IgE-mediated food allergies. Methods Birth records obtained from 192 healthy children and 99 children diagnosed with food allergies were reviewed retrospectively. Data pertaining to delivery method, perinatal antibiotic exposure, neonatal nursery environment, and maternal variables were recorded. Logistic regression analysis was used to assess the association between variables of interest and subsequent food allergy diagnosis. Results Retrospective investigation did not find perinatal antibiotics, NICU admission, or cesarean section to be associated with increased risk of food allergy diagnosis. However, associations between food allergy diagnosis and male gender (66 vs. 33; p=0.02) were apparent in this cohort. Additionally, increasing maternal age at delivery was significantly associated with food allergy diagnosis during childhood (OR, 1.05; 95% CI, 1.017 to 1.105; p=0.005). Conclusions Gut flora are potent immunomodulators, but their overall contribution to immune maturation remains to be elucidated. Additional understanding of the interplay between immunologic, genetic, and environmental factors underlying food allergy development need to be clarified before probiotic therapeutic interventions can routinely be recommended for prevention or mitigation of food allergies. Such interventions may be well-suited in male infants and in infants born to older mothers.
Collapse
Affiliation(s)
- Kelly Dowhower Karpa
- Pennsylvania State University College of Medicine, 500 University Drive, Hershey, PA 17033, USA.
| | | | | | | | | | | | | | | | | |
Collapse
|
173
|
O'Toole PW. Changes in the intestinal microbiota from adulthood through to old age. Clin Microbiol Infect 2012; 18 Suppl 4:44-6. [PMID: 22647048 DOI: 10.1111/j.1469-0691.2012.03867.x] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The human intestinal microbiota comprises a complex community whose composition has been resolved in fine detail by recent culture-independent methodologies. The adult intestinal microbiota is stable within individuals, and individual specific when examined at high resolution. Infants and older persons, however, represent stages of life in which the microbiota is in flux. Since changes in the intestinal microbiota are associated with certain diseases or health issues, we have examined the composition and function of the intestinal microbiota in 500 subjects over 65 years of age in Ireland. Medical, biochemical and immunological parameters were measured for all subjects. Faecal microbiota was measured by amplicon pyrosequencing. The data revealed significant inter-individual variation, especially in the proportions of some major bacterial phyla, and significant differences in the microbiota compared with younger adults. These data support the notion of modulating the intestinal microbiota of older people to promote enhanced nutrition utilization and to improve general health.
Collapse
Affiliation(s)
- P W O'Toole
- Department of Microbiology and Alimentary Pharmabiotic Centre, University College, Cork, Ireland.
| |
Collapse
|
174
|
Tachon S, Zhou J, Keenan M, Martin R, Marco ML. The intestinal microbiota in aged mice is modulated by dietary resistant starch and correlated with improvements in host responses. FEMS Microbiol Ecol 2012; 83:299-309. [DOI: 10.1111/j.1574-6941.2012.01475.x] [Citation(s) in RCA: 151] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2012] [Revised: 08/02/2012] [Accepted: 08/09/2012] [Indexed: 01/11/2023] Open
Affiliation(s)
- Sybille Tachon
- Department of Food Science and Technology; The University of California; Davis; CA; USA
| | | | - Michael Keenan
- Louisiana State University Agricultural Center; Baton Rouge; LA; USA
| | | | - Maria L. Marco
- Department of Food Science and Technology; The University of California; Davis; CA; USA
| |
Collapse
|
175
|
O'Sullivan O, Coakley M, Lakshminarayanan B, Conde S, Claesson MJ, Cusack S, Fitzgerald AP, O'Toole PW, Stanton C, Ross RP. Alterations in intestinal microbiota of elderly Irish subjects post-antibiotic therapy. J Antimicrob Chemother 2012; 68:214-21. [PMID: 22949626 DOI: 10.1093/jac/dks348] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
OBJECTIVES The human intestinal microbiota composition alters naturally with age, but is unusually perturbed by antibiotic therapy. The impact of antibiotic therapy on the composition of the intestinal microbiota of a cross-section of elderly Irish subjects (n = 185, ≥ 65 years) was investigated, taking into consideration their residence location. METHODS Forty-two of the 185 elderly subjects were treated with at least one antibiotic within 1 month prior to faecal microbiota profiling. The residence locations of the subjects varied from long-term nursing care and rehabilitation wards to day hospitals and the community. RESULTS Culture-dependent methods indicated that faecal Bifidobacterium spp. numbers were significantly reduced following antibiotic treatment (P = 0.004, 7-fold reduction), while levels of Lactobacillus spp. and Enterobacteriaceae were unaffected. The largest decrease in Bifidobacterium spp. numbers was linked to the administration of nucleic acid synthesis inhibitors (P = 0.004, 23-fold reduction). Microbiota profiling revealed a significant compositional change across nine genera following antibiotic therapy, including a relative increase in Lactobacillus spp. (P = 0.031), as well as a decrease in the number of genera identified in the antibiotic-treated subjects (n = 58), when compared with untreated subjects (n = 79). More alterations in the intestinal microbiota were observed post-nucleic acid synthesis inhibitor therapy, most notably a decrease in relative Faecalibacterium spp. numbers (P < 0.001). CONCLUSIONS The impact of antibiotic therapy on the intestinal microbiota in the elderly should be considered for long-term health effects, and differential susceptibility may require the development of products (e.g. prebiotics and probiotics) for at-risk subjects.
Collapse
Affiliation(s)
- Orla O'Sullivan
- Teagasc Food Research Centre, Moorepark, Fermoy, Co Cork, Ireland
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
176
|
Steegenga WT, de Wit NJ, Boekschoten MV, Ijssennagger N, Lute C, Keshtkar S, Bromhaar MMG, Kampman E, de Groot LC, Muller M. Structural, functional and molecular analysis of the effects of aging in the small intestine and colon of C57BL/6J mice. BMC Med Genomics 2012; 5:38. [PMID: 22929163 PMCID: PMC3534289 DOI: 10.1186/1755-8794-5-38] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2012] [Accepted: 08/17/2012] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND By regulating digestion and absorption of nutrients and providing a barrier against the external environment the intestine provides a crucial contribution to the maintenance of health. To what extent aging-related changes in the intestinal system contribute to the functional decline associated with aging is still under debate. METHODS Young (4 M) and old (21 M) male C57BL/6J mice were fed a control low-fat (10E%) or a high-fat diet (45E%) for 2 weeks. During the intervention gross energy intake and energy excretion in the feces were measured. After sacrifice the small and large intestine were isolated and the small intestine was divided in three equal parts. Swiss rolls were prepared of each of the isolated segments for histological analysis and the luminal content was isolated to examine alterations in the microflora with 16S rRNA Q-PCR. Furthermore, mucosal scrapings were isolated from each segment to determine differential gene expression by microarray analysis and global DNA methylation by pyrosequencing. RESULTS Digestible energy intake was similar between the two age groups on both the control and the high-fat diet. Microarray analysis on RNA from intestinal scrapings showed no marked changes in expression of genes involved in metabolic processes. Decreased expression of Cubilin was observed in the intestine of 21-month-old mice, which might contribute to aging-induced vitamin B12 deficiency. Furthermore, microarray data analysis revealed enhanced expression of a large number of genes involved in immune response and inflammation in the colon, but not in the small intestine of the 21-month-old mice. Aging-induced global hypomethylation was observed in the colon and the distal part of the small intestine, but not in the first two sections of the small intestine. CONCLUSION In 21-month old mice the most pronounced effects of aging were observed in the colon, whereas very few changes were observed in the small intestine.
Collapse
Affiliation(s)
- Wilma T Steegenga
- Division of Human Nutrition, Wageningen University, Wageningen, The Netherlands.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
177
|
Flores R, Shi J, Gail MH, Gajer P, Ravel J, Goedert JJ. Assessment of the human faecal microbiota: II. Reproducibility and associations of 16S rRNA pyrosequences. Eur J Clin Invest 2012; 42:855-63. [PMID: 22385292 PMCID: PMC3369017 DOI: 10.1111/j.1365-2362.2012.02659.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
BACKGROUND We conducted a pilot study of reproducibility and associations of microbial diversity and composition in faecal microbial DNA. METHODS AND RESULTS Participants (25 men and 26 women, aged 17-65 years) provided questionnaire data and multiple samples of one stool collected with two Polymedco and two Sarstedt devices preloaded with RNAlater. 16S rRNA genes in each faecal DNA aliquot were amplified, sequenced (Roche/454 Life Sciences) and assigned to taxa. Devices were compared for ease of use and reproducibility [intraclass correlation coefficient (ICC)] between duplicate aliquots on diversity and taxonomic assignment. Associations were tested by linear regression. Both collection devices were easy to use. Both alpha diversity (Shannon index) and beta diversity (UniFrac) were higher between than within duplicates (P ≤ 10(-8) ) and did not differ significantly by device (P ≥ 0·62). Reproducibility was good (ICC≥0·77) for alpha diversity and taxonomic assignment to the most abundant phyla, Firmicutes and Bacteroidetes (71·5% and 25·0% of sequences, respectively), but reproducibility was low (ICC≤0·48) for less abundant taxa. Alpha diversity was lower with nonantibiotic prescription medication (P = 0·02), with younger age (P = 0·03) and marginally with higher body mass index (P = 0·08). CONCLUSIONS With sampling from various parts of a stool, both devices provided good reproducibility on overall microbial diversity and classification for the major phyla, but not for minor phyla. Implementation of these methods should provide insights into how broad microbial parameters, but not necessarily rare microbes, affect risk of various conditions.
Collapse
Affiliation(s)
- Roberto Flores
- Infections and Immunoepidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, MD, USA
| | | | | | | | | | | |
Collapse
|
178
|
Abstract
Probiotics are live microorganisms present in several foods and nutritional supplements that may prevent or limit the effects of various illnesses and infections and elicit a range of health benefits in physically active individuals. The primary clinical areas of interest with probiotics include metabolism; gastrointestinal, inflammatory, and functional disorders; the respiratory system; and a range of infections and allergies. The gastrointestinal tract is a key element controlling and regulating adaptation to exercise and physical activity. Gut symptomatology such as nausea, bloating, cramping, pain, diarrhea, and bleeding occurs in some highly active individuals such as athletes, particularly in prolonged exhaustive events. A small number of studies examining probiotic supplementation in highly active individuals indicate modest clinical benefits in terms of reduced frequency, severity, and/or duration of respiratory and gastrointestinal illness. The purported mechanisms of action for probiotics include direct interaction with the gut microbiota, interaction with the gut epithelium and mucosal immune system, and via immune signaling to organs and systems including the liver, brain, and respiratory tract. Future research will identify additional biologically and clinically beneficial strains, validate multicomponent formulations, clarify dose–response issues, and inform the development of guidelines for clinicians, health care practitioners, and the general community.
Collapse
Affiliation(s)
- David B. Pyne
- Department of Physiology, Australian Institute of Sport, Canberra (DBP)
- Griffith Health, Griffith University, Gold Coast (DBP, NPW, AWC)
- The Australian National University Medical School, Canberra (DBP)
- Faculty of Health, University of Canberra, Canberra, Australia (DBP)
| | - Nicholas P. West
- Department of Physiology, Australian Institute of Sport, Canberra (DBP)
- Griffith Health, Griffith University, Gold Coast (DBP, NPW, AWC)
- The Australian National University Medical School, Canberra (DBP)
- Faculty of Health, University of Canberra, Canberra, Australia (DBP)
| | - Allan W. Cripps
- Department of Physiology, Australian Institute of Sport, Canberra (DBP)
- Griffith Health, Griffith University, Gold Coast (DBP, NPW, AWC)
- The Australian National University Medical School, Canberra (DBP)
- Faculty of Health, University of Canberra, Canberra, Australia (DBP)
| |
Collapse
|
179
|
Holmes E, Kinross J, Gibson GR, Burcelin R, Jia W, Pettersson S, Nicholson JK. Therapeutic Modulation of Microbiota-Host Metabolic Interactions. Sci Transl Med 2012; 4:137rv6. [DOI: 10.1126/scitranslmed.3004244] [Citation(s) in RCA: 181] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
180
|
Arboleya S, González S, Salazar N, Ruas-Madiedo P, de los Reyes-Gavilán CG, Gueimonde M. Development of probiotic products for nutritional requirements of specific human populations. Eng Life Sci 2012. [DOI: 10.1002/elsc.201100129] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Affiliation(s)
- Silvia Arboleya
- Department of Microbiology and Biochemistry of Dairy Products; Instituto de Productos Lácteos de Asturias (IPLA-CSIC); Villaviciosa; Asturias; Spain
| | - Sonia González
- Department of Functional Biology; University of Oviedo; Oviedo; Asturias; Spain
| | - Nuria Salazar
- Department of Microbiology and Biochemistry of Dairy Products; Instituto de Productos Lácteos de Asturias (IPLA-CSIC); Villaviciosa; Asturias; Spain
| | - Patricia Ruas-Madiedo
- Department of Microbiology and Biochemistry of Dairy Products; Instituto de Productos Lácteos de Asturias (IPLA-CSIC); Villaviciosa; Asturias; Spain
| | - Clara G. de los Reyes-Gavilán
- Department of Microbiology and Biochemistry of Dairy Products; Instituto de Productos Lácteos de Asturias (IPLA-CSIC); Villaviciosa; Asturias; Spain
| | - Miguel Gueimonde
- Department of Microbiology and Biochemistry of Dairy Products; Instituto de Productos Lácteos de Asturias (IPLA-CSIC); Villaviciosa; Asturias; Spain
| |
Collapse
|
181
|
Abstract
The human body is home to more than 1 trillion microbes, with the gastrointestinal tract alone harboring a diverse array of commensal microbes that are believed to contribute to host nutrition, developmental regulation of intestinal angiogenesis, protection from pathogens, and development of the immune response. Recent advances in genome sequencing technologies and metagenomic analysis are providing a broader understanding of these resident microbes and highlighting differences between healthy and disease states. The aim of this review is to provide a detailed summary of current pediatric microbiome studies in the literature, in addition to highlighting recent findings and advancements in studies of the adult microbiome. This review also seeks to elucidate the development of, and factors that could lead to changes in, the composition and function of the human microbiome.
Collapse
Affiliation(s)
- Coreen L. Johnson
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, Texas; and
| | - James Versalovic
- Departments of Pathology & Immunology and Pediatrics, Baylor College of Medicine, Department of Pathology, Texas Children’s Hospital, Houston, Texas
| |
Collapse
|
182
|
Payne AN, Chassard C, Banz Y, Lacroix C. The composition and metabolic activity of child gut microbiota demonstrate differential adaptation to varied nutrient loads in an in vitro model of colonic fermentation. FEMS Microbiol Ecol 2012; 80:608-23. [DOI: 10.1111/j.1574-6941.2012.01330.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2011] [Revised: 01/30/2012] [Accepted: 02/06/2012] [Indexed: 10/14/2022] Open
Affiliation(s)
- Amanda N. Payne
- Institute of Food, Nutrition and Health; ETH Zürich; Zürich; Switzerland
| | | | - Yannick Banz
- Institute of Food, Nutrition and Health; ETH Zürich; Zürich; Switzerland
| | - Christophe Lacroix
- Institute of Food, Nutrition and Health; ETH Zürich; Zürich; Switzerland
| |
Collapse
|
183
|
Krajmalnik-Brown R, Ilhan ZE, Kang DW, DiBaise JK. Effects of gut microbes on nutrient absorption and energy regulation. Nutr Clin Pract 2012; 27:201-14. [PMID: 22367888 DOI: 10.1177/0884533611436116] [Citation(s) in RCA: 500] [Impact Index Per Article: 41.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Malnutrition may manifest as either obesity or undernutrition. Accumulating evidence suggests that the gut microbiota plays an important role in the harvest, storage, and expenditure of energy obtained from the diet. The composition of the gut microbiota has been shown to differ between lean and obese humans and mice; however, the specific roles that individual gut microbes play in energy harvest remain uncertain. The gut microbiota may also influence the development of conditions characterized by chronic low-level inflammation, such as obesity, through systemic exposure to bacterial lipopolysaccharide derived from the gut microbiota. In this review, the role of the gut microbiota in energy harvest and fat storage is explored, as well as differences in the microbiota in obesity and undernutrition.
Collapse
|
184
|
Biagi E, Candela M, Fairweather-Tait S, Franceschi C, Brigidi P. Aging of the human metaorganism: the microbial counterpart. AGE (DORDRECHT, NETHERLANDS) 2012; 34:247-67. [PMID: 21347607 PMCID: PMC3260362 DOI: 10.1007/s11357-011-9217-5] [Citation(s) in RCA: 215] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2010] [Accepted: 01/30/2011] [Indexed: 05/26/2023]
Abstract
Human beings have been recently reviewed as 'metaorganisms' as a result of a close symbiotic relationship with the intestinal microbiota. This assumption imposes a more holistic view of the ageing process where dynamics of the interaction between environment, intestinal microbiota and host must be taken into consideration. Age-related physiological changes in the gastrointestinal tract, as well as modification in lifestyle, nutritional behaviour, and functionality of the host immune system, inevitably affect the gut microbial ecosystem. Here we review the current knowledge of the changes occurring in the gut microbiota of old people, especially in the light of the most recent applications of the modern molecular characterisation techniques. The hypothetical involvement of the age-related gut microbiota unbalances in the inflamm-aging, and immunosenescence processes will also be discussed. Increasing evidence of the importance of the gut microbiota homeostasis for the host health has led to the consideration of medical/nutritional applications of this knowledge through the development of probiotic and prebiotic preparations specific for the aged population. The results of the few intervention trials reporting the use of pro/prebiotics in clinical conditions typical of the elderly will be critically reviewed.
Collapse
Affiliation(s)
- Elena Biagi
- Department of Pharmaceutical Sciences, University of Bologna, Via Belmeloro 6, 40126 Bologna, Italy
| | - Marco Candela
- Department of Pharmaceutical Sciences, University of Bologna, Via Belmeloro 6, 40126 Bologna, Italy
| | | | - Claudio Franceschi
- Department of Experimental Pathology and CIG—Interdipartimental Center L. Galvani, University of Bologna, Bologna, Italy
| | - Patrizia Brigidi
- Department of Pharmaceutical Sciences, University of Bologna, Via Belmeloro 6, 40126 Bologna, Italy
| |
Collapse
|
185
|
|
186
|
Jirillo F, Jirillo E, Magrone T. Restoration of host–microbiota homeostasis for attaining healthy aging: the role of milk and fermented milk. MEDITERRANEAN JOURNAL OF NUTRITION AND METABOLISM 2011. [DOI: 10.1007/s12349-011-0051-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
187
|
The aging gut microbiota: new perspectives. Ageing Res Rev 2011; 10:428-9. [PMID: 21402177 DOI: 10.1016/j.arr.2011.03.004] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2011] [Accepted: 03/07/2011] [Indexed: 11/23/2022]
|
188
|
In silico phylogenetic analysis of lactic acid bacteria and new primer set for identification of Lactobacillus plantarum in food samples. Eur Food Res Technol 2011. [DOI: 10.1007/s00217-011-1508-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
189
|
Gerritsen J, Smidt H, Rijkers GT, de Vos WM. Intestinal microbiota in human health and disease: the impact of probiotics. GENES & NUTRITION 2011; 6:209-40. [PMID: 21617937 PMCID: PMC3145058 DOI: 10.1007/s12263-011-0229-7] [Citation(s) in RCA: 432] [Impact Index Per Article: 33.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/04/2011] [Accepted: 04/20/2011] [Indexed: 02/07/2023]
Abstract
The complex communities of microorganisms that colonise the human gastrointestinal tract play an important role in human health. The development of culture-independent molecular techniques has provided new insights in the composition and diversity of the intestinal microbiota. Here, we summarise the present state of the art on the intestinal microbiota with specific attention for the application of high-throughput functional microbiomic approaches to determine the contribution of the intestinal microbiota to human health. Moreover, we review the association between dysbiosis of the microbiota and both intestinal and extra-intestinal diseases. Finally, we discuss the potential of probiotic microorganism to modulate the intestinal microbiota and thereby contribute to health and well-being. The effects of probiotic consumption on the intestinal microbiota are addressed, as well as the development of tailor-made probiotics designed for specific aberrations that are associated with microbial dysbiosis.
Collapse
Affiliation(s)
- Jacoline Gerritsen
- Laboratory of Microbiology, Wageningen University, Dreijenplein 10, 6703 HB, Wageningen, The Netherlands,
| | | | | | | |
Collapse
|
190
|
O'Sullivan Ó, Coakley M, Lakshminarayanan B, Claesson MJ, Stanton C, O'Toole PW, Ross RP. Correlation of rRNA gene amplicon pyrosequencing and bacterial culture for microbial compositional analysis of faecal samples from elderly Irish subjects. J Appl Microbiol 2011; 111:467-73. [PMID: 21718396 DOI: 10.1111/j.1365-2672.2011.05067.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AIMS The aim of this investigation was to establish the degree of correlation between measurements from culture-dependent microbiological techniques and from next generation sequencing technologies. METHODS AND RESULTS Data generated by both techniques were collected from faecal samples from 185 elderly Irish people involved in the ongoing ELDERMET study (http://eldermet.ucc.ie). The results for three groups of intestinal bacteria were compared. Bifidobacterium sp., Lactobacillus sp. and Enterobacteriaceae were enumerated on selective media through culture-dependent techniques, whereas proportions of these bacteria were determined through sequencing technology against the background of other bacteria. The Spearman's rank correlation coefficient determined a good correlation between results from culture-dependent microbiology and culture-independent techniques for all three bacterial groups assessed (correlation coefficients for Bifidobacterium sp., Lactobacillus sp. and Enterobacteriaceae were 0·380, 0·366 and 0·437, respectively). CONCLUSION Correlation between the two methods implies that a single method is capable of profiling intestinal Bifidobacterium, Lactobacillus and Enterobacteriaceae populations. However, both methods have advantages that justify their use in tandem. SIGNIFICANCE AND IMPACT OF THE STUDY This is the first extensive study to compare bacterial counts from culture-dependent microbiological techniques and from next generation sequencing technologies.
Collapse
Affiliation(s)
- Ó O'Sullivan
- Teagasc Food Research Centre, Moorepark, Fermoy, Co. Cork, Ireland
| | | | | | | | | | | | | | | |
Collapse
|
191
|
Zhao L, Qiao X, Zhu J, Zhang X, Jiang J, Hao Y, Ren F. Correlations of fecal bacterial communities with age and living region for the elderly living in Bama, Guangxi, China. J Microbiol 2011; 49:186-92. [PMID: 21538237 DOI: 10.1007/s12275-011-0405-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2010] [Accepted: 11/21/2010] [Indexed: 01/18/2023]
Abstract
Bama County (Guangxi, China) is famous for its longevous population. In this study, intestinal microflora of 17 healthy elderly subjects of different ages and from different regions (rural and urban) in Bama, were analyzed by denaturing gradient gel electrophoresis (DGGE). Significant effects of age and living region on the whole intestinal bacterial communities were observed by redundancy analysis (RDA). A total of 11 bacterial strains that were correlated with age and living region were identified using a t-value biplot combined with band sequencing. Four bacterial strains were correlated with both age and living region of the elderly in Bama. Two Bacteroides strains and one Ruminococcaceae strain were abundant in the rural, younger elderly; conversely, one Desulfovibrio strain was high in the urban, older elderly. Another Bacteroidetes strain was only correlated with the participant's age, and its abundance increased with the age of the elderly. The richness of one Clostridium sordellii strain, which was only correlated with the elderly living region, was high in the urban elderly. The study also found five other novel bacterial strains that were correlated with the age or living region of the elderly in Bama. These results expand our understanding of age- and region-effects on the intestinal microflora of the elderly and raise the possibility of developing probiotics originating from centenarians.
Collapse
Affiliation(s)
- Liang Zhao
- Key Laboratory of Functional Dairy, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, P R China
| | | | | | | | | | | | | |
Collapse
|
192
|
Dominguez-Bello MG, Blaser MJ, Ley RE, Knight R. Development of the human gastrointestinal microbiota and insights from high-throughput sequencing. Gastroenterology 2011; 140:1713-9. [PMID: 21530737 PMCID: PMC10924805 DOI: 10.1053/j.gastro.2011.02.011] [Citation(s) in RCA: 256] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2010] [Revised: 02/04/2011] [Accepted: 02/09/2011] [Indexed: 12/02/2022]
Abstract
Little was known about the development of the gastrointestinal (GI) tract microbiota, until recently, because of difficulties in obtaining sufficient sequence information from enough people or time points. Now, with decreased costs of DNA sequencing and improved bioinformatic tools, we can compare GI tract bacterial communities among individuals, of all ages from infancy to adulthood. Some key recent findings are that the initial bacterial community, even in the GI tract, depends strongly on delivery mode; that the process of early development of the microbiota is highly unstable and idiosyncratic; that the microbiota differs considerably among children from different countries; and that older adults have substantially different GI tract communities than younger adults, indicating that the GI tract microbiota can change throughout life. We relate these observations to different models of evolution including the evolution of senescence and suggest that probiotics be selected based on patient age. Studies of the microbiota in older people might tell us which probiotics could increase longevity. Drug metabolism varies among individuals with different microbial communities, so age- and region-specific clinical trials are required to ensure safety and efficacy.
Collapse
Affiliation(s)
| | - Martin J. Blaser
- Departments of Medicine and Microbiology and University Langone Medical Center, New York, NY 10016
- Veterans Affairs Medical Center, New York University Langone Medical Center, New York, NY 10016
- Department of Biology, New York University, New York, NY 10003
| | - Ruth E. Ley
- Department of Microbiology, Cornell University, Ithaca, NY 14850
| | - Rob Knight
- Howard Hughes Medical Institute, Boulder, CO 80309
- Department of Chemistry & Biochemistry, University of Colorado at Boulder, Boulder, CO 80309
| |
Collapse
|
193
|
Cusack S, Claesson MJ, O’Toole PW. How beneficial is the use of probiotic supplements for the aging gut? ACTA ACUST UNITED AC 2011. [DOI: 10.2217/ahe.11.8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The specific health benefits of probiotic supplementation in aging populations remain relatively undefined. Although some probiotic research performed to date has focused on specific populations – particular disease groups or those in dynamic life stages such as the very young and older adults – dedicated studies of older subjects with a typical range of age-related conditions are few. Published studies also feature a narrow range of probiotic strains. Exploitation of strain specificity to modulate the composition and function of the microbiota is crucial to maximize the potential benefit of probiotics. A combination of prebiotic (dietary) and probiotic agents may prove most effective in targeted modulation of the microbiota. The efficacy of specific probiotic strains in modulating the microbiota of older populations is worth pursuing, although the role of antibiotics and polypharmacy (use of multiple medications) in influencing the potential benefits of probiotic intervention requires more dedicated study.
Collapse
Affiliation(s)
| | - Marcus J Claesson
- Department of Microbiology, University College Cork, Ireland
- Alimentary Pharmabiotic Centre, University College Cork, Ireland
| | - Paul W O’Toole
- Department of Microbiology, University College Cork, Ireland
- Alimentary Pharmabiotic Centre, University College Cork, Ireland
| |
Collapse
|
194
|
Sparkes AH. Feeding old cats--an update on new nutritional therapies. Top Companion Anim Med 2011; 26:37-42. [PMID: 21435625 DOI: 10.1053/j.tcam.2011.01.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2010] [Accepted: 01/10/2011] [Indexed: 11/11/2022]
Abstract
Aging is associated with a wide variety of physiological changes that compromise the ability of the body to respond to stress or change, and ultimately contribute to morbidity and mortality. Much research has been done on the aging process in humans and experimental animals, and the impact of diet, but there is relatively little data from companion animal studies. However, although many of the aging changes are likely to be similar between different mammals, it is known that there are some differences with cats. In contrast to dogs and humans, elderly cats experience an increase in their maintenance energy requirements rather than a continued decline, which may be mediated partly through a better-maintained basal metabolic rate but also through progressive compromise in fat and protein digestion. Old age is also associated with a progressive loss of lean body mass that may be mitigated in part by feeding higher protein levels. Diets designed for healthy elderly cats should therefore concentrate on being energy dense, highly digestible and with an increase in the proportion of protein calories, and being fed with the aim of supporting optimal body weight. There is also strong evidence emerging that dietary manipulation in cats may be able to modify aspects of the aging process, with a long-term longitudinal study of cats demonstrating both survival and health benefits from feeding a diet supplemented with antioxidants, fatty acids, and a prebiotic source.
Collapse
|
195
|
Aging of the human metaorganism: the microbial counterpart. AGE (DORDRECHT, NETHERLANDS) 2011. [PMID: 21347607 DOI: 10.1007/s11357] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Human beings have been recently reviewed as 'metaorganisms' as a result of a close symbiotic relationship with the intestinal microbiota. This assumption imposes a more holistic view of the ageing process where dynamics of the interaction between environment, intestinal microbiota and host must be taken into consideration. Age-related physiological changes in the gastrointestinal tract, as well as modification in lifestyle, nutritional behaviour, and functionality of the host immune system, inevitably affect the gut microbial ecosystem. Here we review the current knowledge of the changes occurring in the gut microbiota of old people, especially in the light of the most recent applications of the modern molecular characterisation techniques. The hypothetical involvement of the age-related gut microbiota unbalances in the inflamm-aging, and immunosenescence processes will also be discussed. Increasing evidence of the importance of the gut microbiota homeostasis for the host health has led to the consideration of medical/nutritional applications of this knowledge through the development of probiotic and prebiotic preparations specific for the aged population. The results of the few intervention trials reporting the use of pro/prebiotics in clinical conditions typical of the elderly will be critically reviewed.
Collapse
|
196
|
Diversity and metabolic impact of intestinal Lactobacillus species in healthy adults and the elderly. Br J Nutr 2011; 105:1235-44. [PMID: 21303568 DOI: 10.1017/s0007114510004770] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The present study aimed at assessing the counts and species distribution of intestinal lactobacilli and exploring if the data are associated with BMI and blood glucose level in healthy adults and elderly persons. The BMI (P < 0·01), the level of fasting blood glucose (P < 0·001) and the total counts of lactobacilli (P < 0·01 by bacteriology; P < 0·001 by real-time PCR) were higher in the elderly. The number of species in adults was lower (P < 0·05), who were more often colonised with Lactobacillus acidophilus (P = 0·031) and L. helveticus (P < 0·001). In contrast, L. plantarum (P = 0·035), L. paracasei (P < 0·001) and L. reuteri (P = 0·031) were more prevalent in the elderly. L. rhamnosus was detected in adults (P < 0·001), but not in any elderly person. BMI was associated with counts of lactobacilli, adjusted for age and sex (P = 0·008). The higher BMI in both groups of persons was associated with the presence of obligate homofermentative lactobacilli and L. sakei, both adjusted for age and sex. Plasma glucose values were positively correlated with BMI and negatively correlated with colonisation with L. paracasei (P = 0·0238) in adults and on the borderline with L. fermentum (P = 0·052) in the elderly. Thus, the species-specific PCR analysis of Lactobacillus sp. combined with viable plating data indicates substantial age-related structural differences in the intestinal lactobacilli communities. The higher counts of intestinal Lactobacillus sp. are associated with higher BMI and blood glucose content, while their specific fermentative groups and species of lactobacilli appear at different glucose levels both in adults and in the elderly.
Collapse
|
197
|
Abstract
PURPOSE OF REVIEW The interest and scope for research in the field of probiotics has significantly widened in recent years. This brief review covers the significant advances in the field of probiotics. RECENT FINDINGS These include conclusive evidence for the benefits of probiotics in preventing all cause mortality and necrotizing enterocolitis (NEC) in preterm very low birth weight (VLBW) neonates, understanding the role of probiotics as vaccine adjuvants, and in modulating inflammatory bowel diseases, bowel cancer, type 1 diabetes mellitus, obesity, high cholesterol levels, and bacterial resistance. Other areas of progress include understanding the role of probiotics in oral health and ageing. SUMMARY Current evidence will lead to routine probiotic supplementation to prevent all cause mortality and NEC in preterm VLBW neonates. Probiotics may also become novel agents as vaccine adjuvants, and in dealing with major public health issues such as obesity, type I diabetes mellitus, and poor oral health. Research in applications of probiotics in food products will rationalize product development, and health claims. As new frontiers continue to be explored the challenges to the basis of the hygiene hypothesis will influence further developments in the field of probiotics.
Collapse
|
198
|
Giongo A, Gano KA, Crabb DB, Mukherjee N, Novelo LL, Casella G, Drew JC, Ilonen J, Knip M, Hyöty H, Veijola R, Simell T, Simell O, Neu J, Wasserfall CH, Schatz D, Atkinson MA, Triplett EW. Toward defining the autoimmune microbiome for type 1 diabetes. ISME JOURNAL 2010; 5:82-91. [PMID: 20613793 DOI: 10.1038/ismej.2010.92] [Citation(s) in RCA: 574] [Impact Index Per Article: 41.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Several studies have shown that gut bacteria have a role in diabetes in murine models. Specific bacteria have been correlated with the onset of diabetes in a rat model. However, it is unknown whether human intestinal microbes have a role in the development of autoimmunity that often leads to type 1 diabetes (T1D), an autoimmune disorder in which insulin-secreting pancreatic islet cells are destroyed. High-throughput, culture-independent approaches identified bacteria that correlate with the development of T1D-associated autoimmunity in young children who are at high genetic risk for this disorder. The level of bacterial diversity diminishes overtime in these autoimmune subjects relative to that of age-matched, genotype-matched, nonautoimmune individuals. A single species, Bacteroides ovatus, comprised nearly 24% of the total increase in the phylum Bacteroidetes in cases compared with controls. Conversely, another species in controls, represented by the human firmicute strain CO19, represented nearly 20% of the increase in Firmicutes compared with cases overtime. Three lines of evidence are presented that support the notion that, as healthy infants approach the toddler stage, their microbiomes become healthier and more stable, whereas, children who are destined for autoimmunity develop a microbiome that is less diverse and stable. Hence, the autoimmune microbiome for T1D may be distinctly different from that found in healthy children. These data also suggest bacterial markers for the early diagnosis of T1D. In addition, bacteria that negatively correlated with the autoimmune state may prove to be useful in the prevention of autoimmunity development in high-risk children.
Collapse
Affiliation(s)
- Adriana Giongo
- Department of Microbiology and Cell Science, University of Florida, Gainesville, FL 32611-0700, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|