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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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“In the intensive care unit (ICU), probiotics have been studied for the prevention of ventilator-associated pneumonia (VAP).(3,6) Multiple probiotic strains (i.”
BackgroundUhde, M., Indart, A. C., Green, P. H. R., Yolken, R. H., Cook, D. B., Shukla, S. K., Vernon, S. D., & Alaedini, A. (2023) · Brain Behavior & Immunity - Health · doi:10.1016/j.bbih.2023.100627 · Cited by 13
“Translocated circulating LPS can result in the rapid secretion of LBP by gastrointestinal and hepatic epithelial cells, as well as sCD14 by CD14 monocytes/macrophages (Brenchley and Douek, 2012).”
BackgroundRouty, J., Royston, L., & Isnard, S. (2022) · JAIDS Journal of Acquired Immune Deficiency Syndromes · doi:10.1097/qai.0000000000002838 · Cited by 13
Fisiologia da Barreira Epitelial Intestinal
Rodrigues, F. A. P., de Medeiros, P. H. Q. S., Prata, M. D. M. G., & Lima, A. Â. M. (2016) · Editora Blucher eBooks · doi:10.5151/9788580391893-18 · Cited by 12
Chandwe, K., Bwakura‐Dangarembizi, M., Amadi, B., Tawodzera, G., Ngosa, D., Dzikiti, A., Chulu, N., Makuyana, R., Zyambo, K., Mutasa, K., et al. (2024) · Nature Communications · doi:10.1038/s41467-024-45528-0 · Cited by 12
Immune Response to an Acute Moderate Dose of Alcohol in Healthy Young Adults
Monnig, M. A., Lamb, P. S., Parra, J. M., Cioe, P. A., Martone, C. M., Monti, P. M., & Szabó, G. (2020) · Alcohol and Alcoholism · doi:10.1093/alcalc/agaa079 · Cited by 12
“the unphysiological movement of gut microbes into systemic circulation, is a source of chronic immune activation and inflammation in numerous diseases (Brenchley and Douek, 2012).”
BackgroundImmunoinflammatory responses in gastrointestinal tract injury and recovery.
Verma, G., Marella, A., Shaquiquzzaman, M., & Alam, M. M. (2013) · Acta Biochimica Polonica · doi:10.18388/abp.2013_1964 · Cited by 12
“The lumen of the gastrointestinal tract is home to an enormous number of bacterial species, and our microbiota generally thrives in a symbiotic relationship with the host (Brenchley & Douek, 2012).”
BackgroundTurner, T. R., Schmitt, C. A., & Cramer, J. D. (2019) · Cambridge University Press eBooks · doi:10.1017/9781139019941 · Cited by 18
Pandrea, I., Brooks, K., Desai, R. P., Tare, M., Brenchley, J. M., & Apetrei, C. (2022) · Frontiers in Immunology · doi:10.3389/fimmu.2022.899559 · Cited by 11
“However, this phenomenon is not specific to SIV/HIV infection, and occurs in multiple clinical conditions in which mucosal epithelium is altered and gut permeability is increased (17).”
BackgroundSelf-citationMoreno, E., Ron, R., & Villar, S. S. (2023) · Frontiers in Immunology · doi:10.3389/fimmu.2023.1072655 · Cited by 11
Emphysema and soluble CD14 are associated with pulmonary nodules in HIV-infected patients
Triplette, M., Sigel, K. M., Morris, A. M., Shahrir, S., Wisnivesky, J. P., Kong, C. Y., Diaz, P. T., Petraglia, A., & Crothers, K. A. (2017) · AIDS · doi:10.1097/qad.0000000000001529 · Cited by 11
He, T., Falwell, E., Brocca‐Cofano, E., & Pandrea, I. (2017) · Current Opinion in Virology · doi:10.1016/j.coviro.2017.07.012 · Cited by 12
Robinson, J. M., & Henderson, W. A. (2018) · BMC Research Notes · doi:10.1186/s13104-018-3126-y · Cited by 11
“Increased intestinal permeability is associated with a variety of gastrointestinal disorders resulting from perturbation of intestinal epithelial homeostasis [1, 2], these include inflammation, chronic diarrhea [3] and Irritable Bowel Syndrome (IBS) [4, 5].”
BackgroundAlamer, E., Carpio, V. H., Ibitokou, S. A., Kirtley, M. L., Phoenix, I., Opata, M. M., Wilson, K. D., Cong, Y., Dann, S. M., Chopra, A. K., et al. (2019) · Parasitology Research · doi:10.1007/s00436-019-06349-z · Cited by 11
Affi, R., Gabillard, D., Dunyach‐Remy, C., Ntakpe, J.-B., Moh, R., Badjé, A., Kouamé, G. M., Karcher, S., Carrou, J. L., Danel, C., et al. (2020) · JAIDS Journal of Acquired Immune Deficiency Syndromes · doi:10.1097/qai.0000000000002533 · Cited by 11
The Prevention of Viral Infections: The Role of Intestinal Microbiota and Nutritional Factors
Altomare, A., Giovanetti, M., Baldaro, F., Ciccozzi, M., Cicala, M., & Guarino, M. P. L. (2024) · Nutrients · doi:10.3390/nu16152445 · Cited by 12
“This approach not only helps in managing infections like those caused by respiratory and gastrointestinal viruses but also in preventing severe outcomes following infections [19].”
BackgroundDeciphering the influence of gut and oral microbiomes on menopause for healthy aging
Yu, S., Huang, F., Huang, Y., Yan, F., Li, L., Xu, S., Zhao, Y., Zhang, X., Chen, R., Chen, X., et al. (2024) · Journal of genetics and genomics/Journal of Genetics and Genomics · doi:10.1016/j.jgg.2024.11.010 · Cited by 11
Calcaterra, V., Cena, H., Loperfido, F., Porri, D., Basilico, S., Gazzola, C., Rizzo, C. R., Conti, M. V., Luppino, G., Wasniewska, M. G., et al. (2024) · Nutrients · doi:10.3390/nu17010123 · Cited by 13
“Individuals with IBD have elevated levels of circulating proinflammatory mediators and this systemic inflammation has been suggested to be due to MT because elevated serum levels of LPS, bacterial DNA and LBP can be detected [41–48].”
Shrivastav, K., Nasser, H., Ikeda, T., & Nema, V. (2025) · Viruses · doi:10.3390/v17070990 · Cited by 10
“Indeed, such a damaged intestinal epithelial barrier is a major contributor of HIV-1-associated local and systemic inflammation [12,13] (Figure 1).”
Mantegazza, C., Maconi, G., Furfaro, F., Bezzio, C., Ramponi, G., Monteleone, M., Zuccotti, G., Giacomet, V., & Mameli, C. (2014) · HIV/AIDS - Research and Palliative Care · doi:10.2147/hiv.s60157 · Cited by 10
Comprehensive Review of Molecular Mechanisms during Cholestatic Liver Injury and Cholangiocarcinoma
Virani, S., Akers, A. T., Stephenson, K., Smith, S. M., Kennedy, L. L., Alpini, G. D., & Francis, H. (2018) · Journal of Liver · doi:10.4172/2167-0889.1000231 · Cited by 9
“The translocation of intestinal bacteria across an inflamed, permeable gut combined with decreased proliferation of other beneficial organisms may result in an overall increased immune response to intestinal endotoxins [48,49].”
BackgroundSerum LPS Associated with Hantavirus and Dengue Disease Severity in Barbados
Douglas, K. O., Samuels, T. A., & Hilaire, M. G.-S. (2019) · Viruses · doi:10.3390/v11090838 · Cited by 10
“Human immunodeficiency virus (HIV) also targets monocytes and high endotoxin levels are associated with HIV replication in the GALT due to MT [45,46].”
BackgroundGoraya, N., & Wesson, D. E. (2019) · Current Opinion in Nephrology & Hypertension · doi:10.1097/mnh.0000000000000568 · Cited by 10
“Gut dysbiosis is associated with increased gut permeability to gut toxins [60,69,70] thereby allowing”
BackgroundWang, H., Li, C., Jiang, Y., Li, H., & Zhang, D. (2020) · Gastroenterology Research and Practice · doi:10.1155/2020/8953453 · Cited by 10
“Previous studies have found that impaired intestinal tight junction (TJ) barrier of SAP leads to increased intestinal permeability, which is one of the pathways for intestinal bacteria to enter the blood circulation and causes bacterial translocation (BT) [11].”
BackgroundKuchta, K., & Cameron, S. (2021) · Frontiers in Pharmacology · doi:10.3389/fphar.2021.705077 · Cited by 10
Lucero, C. M., Junecko, B. A. F., Klamar-Blain, C., Sciullo, L. A., Berendam, S. J., Cillo, A. R., Qin, S., Sui, Y., Sanghavi, S., Murphey‐Corb, M., et al. (2013) · Clinical and Vaccine Immunology · doi:10.1128/cvi.00651-12 · Cited by 10
“Since both of these effects could impact intestinal epithelial barrier integrity, extrapolating to HIV-1-infected individuals, outcomes might include increased microbial translocation and systemic immune activation (40).”
BackgroundCogswell, A. C., Ferguson, N., & Barker, E. (2020) · Journal of Virology · doi:10.1128/jvi.01914-19 · Cited by 10
“Eventually, the microbial products wind up in circulation (53).”
BackgroundMicrobial Translocation and Infectious Diseases: What Is the Link?
d’Ettorre, G., Douek, D. C., Paiardini, M., Ceccarelli, G., & Vullo, V. (2012) · International Journal of Microbiology · doi:10.1155/2012/356981 · Cited by 10
“The authors proposed that this phenomenon contributes to systemic immune activation in people with HIV, and thus plays a causative role in the progression of the disease [3, 4].”
BackgroundSelf-citationCruciani, C., Mathé, C., Puthenparampil, M., Ojer, P. T., Docampo, M. J., Opfer, R., Jelčić, I., Nicot, A. B., Laplaud, D. A., Martinꝉ, R., et al. (2025) · Journal of Clinical Medicine · doi:10.3390/jcm14165771 · Cited by 9
Heightened Microbial Translocation Is a Prognostic Biomarker of Recurrent Tuberculosis
Kumar, N. P., Moideen, K., Viswanathan, V., Sivakumar, S., Ahamed, S. F., Ponnuraja, C., Hissar, S. S., Kornfeld, H., & Babu, S. (2022) · Clinical Infectious Diseases · doi:10.1093/cid/ciac236 · Cited by 9
T cell activation is insufficient to drive SIV disease progression
Apetrei, C., Gaufin, T., Brocca‐Cofano, E., Sivanandham, R., Sette, P., He, T., Sivanandham, S., Sosa, N. M., Martin, K. J., Raehtz, K. D., et al. (2023) · JCI Insight · doi:10.1172/jci.insight.161111 · Cited by 9
“vate innate and adaptive immune responses in HIV/SIV infections (12), the causative relationship between intestinal dysfunction and HIV/SIV disease progression has never been proved.”
So Pathogenic or So What?—A Brief Overview of SIV Pathogenesis with an Emphasis on Cure Research
Kleinman, A. J., Pandrea, I., & Apetrei, C. (2022) · Viruses · doi:10.3390/v14010135 · Cited by 11
Zhang, W., Hu, X., & Jiang, Z. (2022) · Cells · doi:10.3390/cells11111780 · Cited by 9
“The highly permeable intestinal mucosal barrier is connected by tight junctions, avoiding direct contact between the intestinal microbiota and immune cells [74,75].”
BackgroundExploring the Complex Relationship Between Microbiota and Systemic Lupus Erythematosus
Yu, L., Liu, Q., Li, Q., Zhao, C., Zhao, M., & Lu, Q. (2023) · Current Rheumatology Reports · doi:10.1007/s11926-023-01102-z · Cited by 10
Chichetto, N. E., Plankey, M. W., Sheps, D. S., Abraham, A. G., Chen, X., SHOPTAW, S. J., Kaplan, R. C., Post, W. S., & Cook, R. L. (2017) · Drug and Alcohol Dependence · doi:10.1016/j.drugalcdep.2017.09.034 · Cited by 9
“While low level consumption of alcohol may have favorable lipid or antithrombotic effects, low levels of alcohol use have been shown to increase systemic inflammation, as well as risk for microbial translocation (Brenchley and Douek, 2012).”
BackgroundFrom Gut to Blood: Redistribution of Zonulin in People Living with HIV
Augustin, M., Horn, C., Ercanoglu, M. S., Bondet, V., de Silva, U. S., Suárez, I., Chon, S., Nierhoff, D., Zoufaly, A., Wenisch, C., et al. (2024) · Biomedicines · doi:10.3390/biomedicines12102316 · Cited by 8
“The disruption of GI barrier integrity results in microbial translocation, which allows gut microbes and their products to enter the systemic circulation, leading to chronic immune activation [1,2].”
BackgroundOlwenyi, O. A., Asingura, B., Naluyima, P., Anywar, G., Nalunga, J., Nakabuye, M., Semwogerere, M., Bagaya, B. S., Cham, F., Tindikahwa, A., et al. (2021) · BMC Complementary Medicine and Therapies · doi:10.1186/s12906-021-03288-0 · Cited by 9
“This causes gut microbes and bacterial products to transverse the gut protective barrier [13].”
BackgroundFiuza, J. A., Colt, S., de Ornellas, L. G., Matoso, L. F., Gazzinelli, A., Friedman, J. F., & Corrêa‐Oliveira, R. (2022) · PLoS neglected tropical diseases · doi:10.1371/journal.pntd.0010837 · Cited by 8
“MT is typically detected by the presence of serum lipopolysaccharide (LPS) or endotoxin, LPS binding protein (LBP), or circulating antibodies against LPS [30] in serum.”
BackgroundSavanna Monkeys: The Genus Chlorocebus
Turner, T. R., Schmitt, C. A., & Cramer, J. D. (2019) · Cited by 8
Vinton, C. L., Starke, C. E., Ortiz, A. M., Lai, S. H., Flynn, J. K., Sortino, O., Knox, K. S., Sereti, I., & Brenchley, J. M. (2020) · Pathogens and Immunity · doi:10.20411/pai.v5i1.363 · Cited by 8
Self-citationGabriel, E. M., Salinas, T. R. W., Gosselin, A., Larouche-Anctil, E., Durand, M., LANDAY, A. L., Far, M. E., Tremblay, C. L., Routy, J., & Ancuța, P. (2021) · AIDS · doi:10.1097/qad.0000000000002972 · Cited by 8
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“…diagnostic category (medical, surgical, trauma) 38 ; age \ 65 yr, 65–75 yr, and [ 75 yr 39,40 ; frailty status (baseline Clinical Frailty Score [ 5 vs \ 5) 41 ; patients who received vs did not receive antibiotics within two days of randomization; 27 prevalent (present at the time of enrolment)…”
Peritoneal lavage with povidone-iodine solution in colorectal cancer–induced rats
Song, H., Zhang, D., Wen, H., Wang, M., Zhao, N., Gao, Y., & Ding, N. (2018) · Journal of Surgical Research · doi:10.1016/j.jss.2018.02.055 · Cited by 7
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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