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Microbial Translocation Across the GI Tract
Open accessAbstract
The lumen of the gastrointestinal (GI) tract is home to an enormous quantity of different bacterial species, our microbiota, that thrive in an often symbiotic relationship with the host. Given that the healthy host must regulate contact between the microbiota and its immune system to avoid overwhelming systemic immune activation, humans have evolved several mechanisms to attenuate systemic microbial translocation (MT) and its consequences. However, several diseases are associated with the failure of one or more of these mechanisms, with consequent immune activation and deleterious effects on health. Here, we discuss the mechanisms underlying MT, diseases associated with MT, and therapeutic interventions that aim to decrease it.
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“However, in the absence of infection, endotoxin still crosses the mucosal membranes of gut, gums, nose or lungs, the main source being intestinal permeability [36, 37].”
From The endotoxin hypothesis of neurodegeneration (2019) · cites this paper as [37]
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“43 Understanding bacterial-mediated mechanisms which contribute to preferential microbial translocation may enable improved therapeutics to manage non-AIDS defining comorbidities for the millions of people living with HIV.”
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Aerobactin is a key driver of hypervirulent Klebsiella pneumoniae translocation and virulence
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“HIV has also been shown to be associated with microbiome shift and immune activation that may affect the outcome of disease progression [7] Antibiotics have been considered the standard treatment of most infections caused by bacteria.”
BackgroundPotential Role of Microbiota in the Prevention and Therapeutic Management of Infectious Diseases
Shahid, A., Nasir, K., Aslam, S., Kamran, M., Sarfraz, M. H., Saleem, H. G. M., & Khurshid, M. (2022) · Pakistan Journal of Biochemistry and Biotechnology · doi:10.52700/pjbb.v3i1.75 · Cited by 3
“Whenever there is a disruption in the colonization of gut mucosa it results in the translocation of gut microbiota which causes inflammation [33].”
BackgroundImmune profiling in Puerto Rican injection drug users with and without HIV-1 infection
Bennett, S. J., Davila, C. A., Reyes, Z., Valentín-Acevedo, A., Carrasco, K. G., Abadie, R., Marlin, M. C., Beel, M., Chapple, A. G., Fernando, S. C., et al. (2023) · Journal of Leukocyte Biology · doi:10.1093/jleuko/qiad045 · Cited by 2
Nemphos, S. M., Green, H. C., Prusak, J. E., Fell, S. L., Goff, K. A., Varnado, M., Didier, K., Guy, N., Moström, M. J., Tatum, C., et al. (2024) · Viruses · doi:10.3390/v16071036 · Cited by 2
Role of aspirin on colorectal cancer risk and bacterial translocation to bloodstream
Mignozzi, S., Pinto, G. D., Guglielmetti, S., Riso, P., Cintolo, M., Penagini, R., Gargari, G., Marino, M., Ciafardini, C., Ferraroni, M., et al. (2025) · PLoS ONE · doi:10.1371/journal.pone.0319750 · Cited by 2
“Aspirin, CRC and bacterial translocation Necrosis Factor α (TNF-α) and Interleukin-8 levels [25], and this can alter immune response to microbial invasion and also in terms of bacterial selectivity [26].”
Circulating bacterial DNA in cardiovascular disease
Appleby, S. L., & Purcell, R. V. (2025) · Frontiers in Cardiovascular Medicine · doi:10.3389/fcvm.2025.1476165 · Cited by 2
Monnig, M. A., Lamb, P. S., Clark, S. E., & Monti, P. M. (2025) · Alcoholism Clinical and Experimental Research · doi:10.1111/acer.70106 · Cited by 2
Intestinal Inflammation and Cancer of the Gastrointestinal Tract
Neurath, M. F., Fichtner‐Feigl, S., & Kesselring, R. (2015) · Elsevier eBooks · doi:10.1016/b978-0-12-415847-4.00091-4 · Cited by 2
Stenberg, R., Uhde, M., Ajamian, M., Green, P. H., Myléus, A., & Alaedini, A. (2021) · Journal of Pediatric Gastroenterology and Nutrition · doi:10.1097/mpg.0000000000003181 · Cited by 2
“Increased intestinal permeability has been shown to be associated with microbial translocation, leading to enhanced systemic immune reactivity to microbial and dietary antigens, including gluten (22,43).”
BackgroundRole of Microbiota in Health and Disease
Ahmed, M. M., Farhan, M. S., Hamad, A. A., & Edan, A. I. (2022) · Research Journal of Pharmacy and Technology · doi:10.52711/0974-360x.2022.00810 · Cited by 2
Host-microbiota interactions and oncogenesis: Crosstalk and its implications in etiology
Khan, A. A., Nema, V., & Ashraf, M. T. (2023) · Microbial Pathogenesis · doi:10.1016/j.micpath.2023.106063 · Cited by 2
Zhang, G., Wu, R.-D., Zheng, H., Zhang, X.-L., Zhang, M., Tian, R., Liu, G., Pang, W., & Zheng, Y. (2015) · Journal of Immunology Research · doi:10.1155/2015/202738 · Cited by 2
“As previously reported, the translocation of LPS contributes to the systemic immune activation in HIV-1 infection [33], and microbial translocation (especially LPS) has been associated with HIV disease progression [34, 35].”
BackgroundBiological Resources for Genomic Investigation in the Vervet Monkey (Chlorocebus)
Jasinska, A. J. (2019) · Cambridge University Press eBooks · doi:10.1017/9781139019941.002 · Cited by 3
Furch, B. D., Mwakamui, S., Sianongo, S., Zyambo, K., Heimburger, D. C., Koethe, J. R., & Kelly, P. M. (2021) · Transactions of the Royal Society of Tropical Medicine and Hygiene · doi:10.1093/trstmh/trab103 · Cited by 1
Xu, P., Shi, S., Yu, Z., Li, D., & Zhang, C. (2025) · Frontiers in Oncology · doi:10.3389/fonc.2025.1444149 · Cited by 1
“BT characterizes the translocation of intestinal microbes and their products from the intestinal lumen to sterile sites, including circulating blood, mesenteric lymph nodes, abdominal cavity, and internal organs (21).”
Ho, G. G., Achando, B. S., Ali, S., Hemlock, C., Pitchik, H. O., Stewart, C. P., Tofail, F., Rahman, M. Z., Alauddin, M., Rao, G., et al. (2025) · American Journal of Clinical Nutrition · doi:10.1016/j.ajcnut.2025.05.034 · Cited by 1
“This translocation can lead to immune activation, potentially triggering systemic in fl am-mation, which, in turn, may divert much-needed resources away from child neurodevelopment [48,50].”
Torrini, L., Diaco, F., Viscido, A., Sacco, F., Sfara, G., Compagnino, D. E., Puggioni, G., Coletti, M., Antonelli, G., & Raponi, G. (2025) · Diagnostic Microbiology and Infectious Disease · doi:10.1016/j.diagmicrobio.2025.117014 · Cited by 1
Abdulla, A. H., Sheikhnoor, A., Ferrao, K., Stiles, L. I., & Mehta, K. J. (2026) · Clinical and Experimental Medicine · doi:10.1007/s10238-026-02102-w · Cited by 1
“This may result in alco - hol-induced microbial translocation [ 154 , 155 ] which could worsen the inflammation in IBD, given that microbial trans - location plays a major role in IBD pathogenesis [160, 161].”
Inflammaging and the role of micronutrients as immunomodulators: a pathway to healthy aging
Tan, S. S. L., Garg, V., Dhiman, A., Bansal, N., & Conway, P. L. (2026) · Immunity & Ageing · doi:10.1186/s12979-026-00569-5 · Cited by 1
“Combined with elevated oxidative stress, these changes significantly increase intestinal permeability and lead to increased translocation of microbial products such as peptidoglycans, lipopolysaccharides (LPS), and flagel-lins into systemic circulation [87].”
Decoding the power of the microbiome in human health
Kumar, M., Almohannadi, N., & Khodor, S. A. (2026) · Frontiers in Cellular and Infection Microbiology · doi:10.3389/fcimb.2026.1877371 · Cited by 1
Life History of Savanna Monkeys
Turner, T. R., Schmitt, C. A., & Cramer, J. D. (2019) · Cambridge University Press eBooks · doi:10.1017/9781139019941.014 · Cited by 1
Gut Microbiota in Health and Disease - An Overview
Shrihari, T. G. (2018) · Gastroenterology Medicine & Research · doi:10.31031/gmr.2018.02.000531 · Cited by 1
“Microbiome interventions aimed at restoring the homeostasis of the gut microbiome have recently emerged, such as the ingestion of specific fibers or therapeutic microbes [30,31].”
BackgroundTipple, C., Moiemen, N. S., Ioannou, C., Paglione, M. G., Goodson, S. G., McGee, K. C., O’Neil, D. M., Winder, C. L., Barnett, C., Wolf, A. I., et al. (2020) · Burns Open · doi:10.1016/j.burnso.2020.05.005 · Cited by 1
Yatskov, I. A., Beloglazov, V. A., Kubyshkin, A. V., Nikolaeva, A. P., Александровна, Ш. Н., Zyablitskaya, E. Y., Kunitskaya, Y. E., & Lavrenchuk, N. E. (2022) · Бюллетень Восточно-Сибирского научного центра Сибирского отделения Российской академии медицинских наук · doi:10.29413/abs.2022-7.1.2 · Cited by 1
Antimicrobial and cytotoxic extractives from Ficus sycomorus L. (Moraceae)
Mandou, V. S. M., Tsopgni, W. D. T., Nsangou, M. F., Happi, G. M., Waffo, A. F. K., & Happi, E. N. (2022) · Natural Resources for Human Health · doi:10.53365/nrfhh/155330 · Cited by 1
Suba, M.-I., Hogea, B. G., Abu-Awwad, A., Lăzureanu, V. E., Roșca, O., Gurguş, D., Laitin, S. M. D., & Abu-Awwad, S.-A. (2024) · Diseases · doi:10.3390/diseases12120313 · Cited by 1
Ethnoprimatology and Savanna Monkeys
Turner, T. R., Schmitt, C. A., & Cramer, J. D. (2019) · Cambridge University Press eBooks · doi:10.1017/9781139019941.019 · Cited by 1
Wiemken, T. L. (2020) · The University of Louisville Journal of Respiratory Infections · doi:10.18297/jri/vol4/iss2/1 · Cited by 1
“[46-48] If gut microbiota induced systemic inflammation can trigger mood disorders, modulation of the gut microbiota may play a role in depression therapy and prevention of infection.”
BackgroundMolecular triggers of non-celiac wheat sensitivity
Alaedini, A. (2021) · Elsevier eBooks · doi:10.1016/b978-0-12-821594-4.00010-4 · Cited by 1
Immunodeficiency and the GI Tract
Mehandru, S. (2014) · doi:10.1002/9781118932759.ch26 · Cited by 1
Santos, V. M. (2016) · Digital Library of Theses and Dissertations (Universidade de São Paulo) · doi:10.11606/d.42.2016.tde-24022016-110550 · Cited by 1
Maponga, T. G. (2016) · SUNScholar (Stellenbosch University) · Cited by 1
Gut IgA Enhances Systemic IgG Responses to Pneumococcal Vaccines Through the Commensal MicrobiotaPreprint
Gutzeit, C., Grasset, E. K., Matthews, D. B., Maglione, P. J., Magri, G., Britton, G. J., Tomalin, L. E., Pybus, M., Vaquero, S. T., Veeramreddy, P. K., et al. (2021) · bioRxiv (Cold Spring Harbor Laboratory) · doi:10.1101/2021.04.29.439534 · Cited by 1
“This finding was associated with that of augmented circulating sCD14, a soluble antigen released by myeloid cells as a result of hyperactivation by translocated gut bacteria antigens (Brenchley and Douek, 2012; Fadlallah et al., 2018).”
BackgroundConrey, P. E., Denu, L., O’Boyle, K. C., Green, J., Maslanka, J. R., Lubin, J., Duranova, T., Haltzman, B. L., Gianchetti, L., Oldridge, D. A., et al. (2021) · medRxiv · doi:10.1101/2021.08.20.21261620 · Cited by 1
“We investigated the integrity of intestinal barrier function by measuring a widely used marker of intestinal barrier dysfunction and bacterial translocation, the serum concentration of soluble CD14 (sCD14)(Brenchley and Douek, 2012).”
BackgroundMethodGiron, L. B., Peluso, M. J., Ding, J., Kenny, G., Zilberstein, N., Koshy, J., Hong, K. Y., Rasmussen, H. E., Miller, G., Bishehsari, F., et al. (2022) · bioRxiv (Cold Spring Harbor Laboratory) · doi:10.1101/2022.04.12.488051 · Cited by 1
Pedroso-Roussado, C., Guppy, F. M., Bowler, L. D., & Inácio, J. (2022) · Preprints.org · doi:10.20944/preprints202212.0205.v1
Aslam, M. (2023) · Preprints.org · doi:10.20944/preprints202303.0040.v1 · Cited by 1
Teeman, C. S. (2021) · FIU - Digital Commons (Florida International University) · doi:10.25148/etd.fidc010264 · Cited by 1
Poovan, K. (2014) · SUNScholar (Stellenbosch University)
Gut immunopathology in response to Vibrio parahaemolyticus infection
Read, K. A. (2025) · Library, Museums and Press - UDSpace (University of Delaware) · doi:10.58088/p41c-5x29
Metadata
- Authors
- Brenchley, J. M., & Douek, D. C.
- Affiliations
- National Institutes of Health (US)
- Venue
- Annual Review of Immunology
- Publisher
- Annual Reviews
- Published
- 2012-04-23
- Volume
- 30
- Issue
- 1
- Pages
- 149-173
- ISSN
- 0732-0582 (ISSN-L)
- 1545-3278
- PMC
- PMC3513328
- OpenAlex
- W2146488133
- Cited by
- 496
- References
- 222
- Citations by year
- 2026: 22 · 2025: 32 · 2024: 42 · 2023: 30 · 2022: 44 · 2021: 33 · 2020: 42 · 2019: 59 · 2018: 24 · 2017: 40 · 2016: 34 · 2015: 20 · 2014: 27 · 2013: 32 · 2012: 15
- FWCI
- 2.74
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Annual Review of Immunology (publishedVersion)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- Funders
- National Institutes of Health
- National Institute of Allergy and Infectious Diseases (Z01AI001029, ZIAAI005034)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
- Health Sciences › Medicine › Gastroenterology › Gastrointestinal motility and disorders
- Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
- Keywords
- microbial translocation, gut microbiota, gastrointestinal tract, host-microbe interactions, immune activation, systemic inflammation, therapeutic interventions
- MeSH terms
- Animals, Anti-Infective Agents, Digestive System Diseases, Humans, Immunologic Factors, Probiotics, Gastrointestinal Tract, Host-Pathogen Interactions, Metagenome
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