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Elalouf A, Yaniv-Rosenfeld A, Maoz H. Immune response against bacterial infection in organ transplant recipients. Transpl Immunol 2024; 86:102102. [PMID: 39094907 DOI: 10.1016/j.trim.2024.102102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2024] [Revised: 07/30/2024] [Accepted: 07/30/2024] [Indexed: 08/04/2024]
Abstract
This comprehensive review delves into the intricate dynamics between the immune system and bacterial infections in organ transplant recipients. Its primary objective is to fill existing knowledge gaps while critically assessing the strengths and weaknesses of current research. The paper accentuates the delicate balance that must be struck between preventing graft rejection through immunosuppression and maintaining robust immunity against bacterial threats. In this context, personalized medicine emerges as a transformative concept, offering the potential to revolutionize clinical outcomes by tailoring immunosuppressive regimens and vaccination strategies to the unique profiles of transplant recipients. By emphasizing the pivotal role of continuous monitoring, the review underscores the necessity for vigilant surveillance of transplant recipients to detect bacterial infections and associated immune responses early, thereby reducing the risk of severe infections and ultimately improving patient outcomes. Furthermore, the study highlights the significance of the host microbiome in shaping immune responses, suggesting that interventions targeting the microbiome hold promise for enhancing bacterial immunity in transplant recipients, both in research and clinical practice. In terms of future research directions, the review advocates for large-scale, longitudinal studies encompassing diverse patient cohorts to provide more comprehensive insights into post-transplant immune responses. It also advocates integrating multi-omics approaches, including genomics, transcriptomics, proteomics, and microbiome data, to understand immune responses and their underlying mechanisms. In conclusion, this review significantly enriches our understanding of immune responses in transplant recipients. It paves the way for more effective and personalized approaches to managing infections in this complex setting.
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Affiliation(s)
- Amir Elalouf
- Bar-Ilan University, Department of Management, Ramat Gan 5290002, Israel.
| | | | - Hanan Maoz
- Bar-Ilan University, Department of Management, Ramat Gan 5290002, Israel
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Hwang SW, Kim MK, Kweon MN. Gut microbiome on immune checkpoint inhibitor therapy and consequent immune-related colitis: a review. Intest Res 2023; 21:433-442. [PMID: 37640378 PMCID: PMC10626011 DOI: 10.5217/ir.2023.00019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 04/24/2023] [Accepted: 05/03/2023] [Indexed: 08/31/2023] Open
Abstract
Immune checkpoint inhibitors have dramatically revolutionized the therapeutic landscape for patients with advanced malignancies. Recently, convincing evidence has shown meaningful influence of gut microbiome on human immune system. With the complex link between gut microbiome, host immunity and cancer, the variations in the gut microbiota may influence the efficacy of immune checkpoint inhibitors. Indeed, some bacterial species have been reported to be predictive for cancer outcome in patients treated with immune checkpoint inhibitors. Although immune checkpoint inhibitors are currently proven to be an effective anti-tumor treatment, they can induce a distinct form of toxicity, termed immune-related adverse events. Immune-related colitis is one of the common toxicities from immune checkpoint inhibitors, and it might preclude the cancer therapy in severe or refractory cases. The manipulation of gut microbiome by fecal microbiota transplantation or probiotics administration has been suggested as one of the methods to enhance anti-tumor effects and decrease the risk of immune-related colitis. Here we review the role of gut microbiome on immune checkpoint inhibitor therapy and consequent immune-related colitis to provide a new insight for better anti-cancer therapy.
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Affiliation(s)
- Sung Wook Hwang
- Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Min Kyu Kim
- Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Mi-Na Kweon
- Mucosal Immunology Laboratory, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
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3
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Shao X, Liu L, Zhou Y, Zhong K, Gu J, Hu T, Yao Y, Zhou C, Chen W. High-fat diet promotes colitis-associated tumorigenesis by altering gut microbial butyrate metabolism. Int J Biol Sci 2023; 19:5004-5019. [PMID: 37781523 PMCID: PMC10539701 DOI: 10.7150/ijbs.86717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 09/13/2023] [Indexed: 10/03/2023] Open
Abstract
Background: Dietary fat intake is associated with an increased risk of colitis associated cancer (CAC). A high-fat diet (HFD) leads to systemic low-grade inflammation. The colon is believed to be the first organ suffering from inflammation caused by the infiltration of pro-inflammatory macrophages, and promotes CAC progression. We explored the role of HFD in driving CAC by altering gut microbial butyrate metabolism. Methods: Changes in the gut microbiota caused by HFD were investigated via HFD treatment or fecal microbiota transplantation (FMT). The underlying mechanisms were further explored by analyzing the role of gut microbiota, microbial butyrate metabolism, and NLRP3 inflammasome in colon tissues in a CAC mouse model. Results: HFD accelerated CAC progression in mice, and it could be reversed by broad-spectrum antibiotics (ABX). 16S-rRNA sequencing revealed that HFD inhibited the abundance of butyrate-producing bacteria in the gut. The level of short-chain fatty acids (SCFAs), especially butyrate, in the gut of mice treated with HFD was significantly reduced. In addition, treatment with exogenous butyrate reversed the M1 polarization of proinflammatory macrophages, aggravation of intestinal inflammation, and accelerated tumor growth induced by HFD; the NLRP3/Caspase-1 pathway activated by HFD in the colon was also significantly inhibited. In vitro, macrophages were treated with lipopolysaccharide combined with butyrate to detect the M1 polarization level and NLRP3/Caspase-1 pathway expression, and the results were consistent with those of the in vivo experiments. Conclusion: HFD drives colitis-associated tumorigenesis by inducing gut microbial dysbiosis and inhibiting butyrate metabolism to skew macrophage polarization. Exogenous butyrate is a feasible new treatment strategy for CAC, and has good prospect for clinical application.
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Affiliation(s)
- Xinyu Shao
- Department of Gastroenterology, The First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu, China
- Department of Gastroenterology, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University, Suzhou 215008, Jiangsu, China
| | - Luojie Liu
- Department of Gastroenterology, Changshu Hospital Affiliated to Soochow University, Suzhou 215000, Jiangsu, China
| | - Yuqing Zhou
- Department of Gastroenterology, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University, Suzhou 215008, Jiangsu, China
| | - Kaiqiang Zhong
- Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu, China
| | - Jinrong Gu
- Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu, China
| | - Tong Hu
- Department of Gastroenterology, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University, Suzhou 215008, Jiangsu, China
| | - Yizhou Yao
- Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu, China
| | - Chunli Zhou
- Department of Gastroenterology, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University, Suzhou 215008, Jiangsu, China
| | - Weichang Chen
- Department of Gastroenterology, The First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu, China
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Chen M, Ma L, Yu H, Huang S, Zhang J, Gong J, Yang L, Chen L, Luo H, Tian L, Wang S. JK5G postbiotics attenuate immune-related adverse events in NSCLC patients by regulating gut microbiota: a randomized controlled trial in China. Front Oncol 2023; 13:1155592. [PMID: 37601658 PMCID: PMC10436471 DOI: 10.3389/fonc.2023.1155592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 07/19/2023] [Indexed: 08/22/2023] Open
Abstract
Scope This study aimed to evaluate the effects of JK5G postbiotics to regulate imbalanced gut microbiota and its impacts on the efficacy and incidence rate of immune-related adverse events (irAEs) in non-small-cell lung cancer (NSCLC) patients treated with immune checkpoint inhibitors (ICIs). Methods This randomized, double-blind, placebo-controlled trial was conducted in China and included non-squamous or squamous NSCLC patients without EGFR, ROS1, and ALK alteration, treatment-naive, and stage IIIb-IV. Patients were randomly (1:1) divided into two groups to receive four cycles (three weeks for each cycle) of programmed cell death-1 (PD-1) plus chemotherapy plus placebo (control group, n = 30) or to receive PD-1 plus chemotherapy plus JK5G postbiotics (JK5G group, n = 30). The primary endpoint was objective response rate. The secondary endpoints were quality of life (QoL), adverse effects, and the 16S DNA sequencing of gut microbiota, blood inflammatory cytokines, and lymphocyte subsets. This study was registered at www.chictr.org.cn (ChiCTR2200064690). Results Sixty patients were enrolled. The objective response rate was 36.67% (11/30) in the control group and 50.00% (15/30) in the JK5G group (p = 0.297). The JK5G group had better QoL and nutritional levels, as well as lower depression symptoms than the control group (all p < 0.05). Moreover, the JK5G group had a lower incidence of anemia (63.33% vs. 13.33%, p < 0.001), decreased lymphocyte count (20.00% vs. 0%, p = 0.010), decreased appetite (53.33% vs. 16.67%, p = 0.003), nausea (33.33% vs. 6.67%, p = 0.010), and asthenia (30.00% vs. 6.67%, p = 0.017) than the control group. Moreover, JK5G attenuated gut microbiota imbalance, accompanied by increased Faecalibacterium, Ruminococcaceae, and fecal butyrate concentration, and diminished Escherichia-Shigella. Furthermore, JK5G administration significantly decreased the levels of pro-inflammatory markers, including TNF-α, IL-2, and C-reactive protein (CRP) (all p < 0.05). Significant increases in CD3+CD4+ T cells and CD4/CD8 ratio were observed in the peripheral blood of JK5G group patients (all p < 0.05). The enterotype data showed that patients were clustered into Blautia (E1) and Escherichia-Shigella (E2) enterotypes, and JK5G postbiotics intervention might be related to enterotype modulations. Conclusion Our current findings indicated that JK5G postbiotics might attenuate irAEs, and enhance the QoL and nutrition levels of advanced NSCLC patients who received ICIs. JK5G postbiotics could also improve the gut microbiota structures and ameliorate the tumor microenvironment and inflammation. Clinical trial registration www.chictr.org.cn, identifier ChiCTR2200064690.
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Affiliation(s)
- Mengting Chen
- Department of Clinical Nutrition, Chongqing University Cancer Hospital, School of Medicine, Chongqing University, Chongqing, China
| | - Liling Ma
- Department of Geriatric Oncology and Department of Palliative Care, Chongqing University Cancer Hospital, School of Medicine, Chongqing University, Chongqing, China
| | - Huiqing Yu
- Department of Clinical Nutrition, Chongqing University Cancer Hospital, School of Medicine, Chongqing University, Chongqing, China
- Department of Geriatric Oncology and Department of Palliative Care, Chongqing University Cancer Hospital, School of Medicine, Chongqing University, Chongqing, China
| | - Shaoyi Huang
- Department of Geriatric Oncology and Department of Palliative Care, Chongqing University Cancer Hospital, School of Medicine, Chongqing University, Chongqing, China
| | - Junhui Zhang
- Department of Geriatric Oncology and Department of Palliative Care, Chongqing University Cancer Hospital, School of Medicine, Chongqing University, Chongqing, China
| | - Juan Gong
- Department of Geriatric Oncology and Department of Palliative Care, Chongqing University Cancer Hospital, School of Medicine, Chongqing University, Chongqing, China
| | - Liejun Yang
- Department of Geriatric Oncology and Department of Palliative Care, Chongqing University Cancer Hospital, School of Medicine, Chongqing University, Chongqing, China
| | - Lan Chen
- Department of Geriatric Oncology and Department of Palliative Care, Chongqing University Cancer Hospital, School of Medicine, Chongqing University, Chongqing, China
| | - Haojun Luo
- Department of Geriatric Oncology and Department of Palliative Care, Chongqing University Cancer Hospital, School of Medicine, Chongqing University, Chongqing, China
| | - Ling Tian
- Department of Geriatric Oncology and Department of Palliative Care, Chongqing University Cancer Hospital, School of Medicine, Chongqing University, Chongqing, China
| | - Sixiong Wang
- Department of Geriatric Oncology and Department of Palliative Care, Chongqing University Cancer Hospital, School of Medicine, Chongqing University, Chongqing, China
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Sheng D, Yue K, Li H, Zhao L, Zhao G, Jin C, Zhang L. The Interaction between Intratumoral Microbiome and Immunity Is Related to the Prognosis of Ovarian Cancer. Microbiol Spectr 2023; 11:e0354922. [PMID: 36975828 PMCID: PMC10100779 DOI: 10.1128/spectrum.03549-22] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Accepted: 02/22/2023] [Indexed: 03/29/2023] Open
Abstract
Microbiota can influence the occurrence, development, and therapeutic response of a wide variety of cancer types by modulating immune responses to tumors. Recent studies have demonstrated the existence of intratumor bacteria inside ovarian cancer (OV). However, whether intratumor microbes are associated with tumor microenvironment (TME) and prognosis of OV still remains unknown. The RNA-sequencing data and clinical and survival data of 373 patients with OV in The Cancer Genome Atlas (TCGA) were collected and downloaded. According to the knowledge-based functional gene expression signatures (Fges), OV was classified into two subtypes, termed immune-enriched and immune-deficient subtypes. The immune-enriched subtype, which had higher immune infiltration enriched with CD8+ T cells and the M1 type of macrophages (M1) and higher tumor mutational burden, exhibited a better prognosis. Based on the Kraken2 pipeline, the microbiome profiles were explored and found to be significantly different between the two subtypes. A prediction model consisting of 32 microbial signatures was constructed using the Cox proportional-hazard model and showed great prognostic value for OV patients. The prognostic microbial signatures were strongly associated with the hosts' immune factors. Especially, M1 was strongly associated with five species (Achromobacter deleyi and Microcella alkaliphila, Devosia sp. strain LEGU1, Ancylobacter pratisalsi, and Acinetobacter seifertii). Cell experiments demonstrated that Acinetobacter seifertii can inhibit macrophage migration. Our study demonstrated that OV could be classified into immune-enriched and immune-deficient subtypes and that the intratumoral microbiota profiles were different between the two subtypes. Furthermore, the intratumoral microbiome was closely associated with the tumor immune microenvironment and OV prognosis. IMPORTANCE Recent studies have demonstrated the existence of intratumoral microorganisms. However, the role of intratumoral microbes in the development of ovarian cancer and their interaction with the tumor microenvironment are largely unknown. Our study demonstrated that OV could be classified into immune-enriched and -deficient subtypes and that the immune enrichment subtype had a better prognosis. Microbiome analysis showed that intratumor microbiota profiles were different between the two subtypes. Furthermore, the intratumor microbiome was an independent predictor of OV prognosis that could interact with immune gene expression. Especially, M1 was closely associated with intratumoral microbes, and Acinetobacter seifertii could inhibit macrophage migration. Together, the findings of our study highlight the important roles of intratumoral microbes in the TME and prognosis of OV, paving the way for further investigation into its underlying mechanisms.
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Affiliation(s)
- Dashuang Sheng
- Department of Biostatistics, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, China
- Microbiome-X, National Institute of Health Data Science of China & Institute for Medical Dataology, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Kaile Yue
- Department of Biostatistics, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, China
- Microbiome-X, National Institute of Health Data Science of China & Institute for Medical Dataology, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Hongfeng Li
- Department of Biostatistics, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, China
- Microbiome-X, National Institute of Health Data Science of China & Institute for Medical Dataology, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Lanlan Zhao
- Department of Biostatistics, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, China
- Microbiome-X, National Institute of Health Data Science of China & Institute for Medical Dataology, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Guoping Zhao
- Department of Biostatistics, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, China
- Microbiome-X, National Institute of Health Data Science of China & Institute for Medical Dataology, Cheeloo College of Medicine, Shandong University, Jinan, China
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
- CAS Key Laboratory of Computational Biology, Bio-Med Big Data Center, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Chuandi Jin
- Department of Biostatistics, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, China
- Microbiome-X, National Institute of Health Data Science of China & Institute for Medical Dataology, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Lei Zhang
- Department of Biostatistics, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, China
- Microbiome-X, National Institute of Health Data Science of China & Institute for Medical Dataology, Cheeloo College of Medicine, Shandong University, Jinan, China
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
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6
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Yu J, Yin Y, Yu Y, Cheng M, Zhang S, Jiang S, Dong M. Effect of concomitant antibiotics use on patient outcomes and adverse effects in patients treated with ICIs. Immunopharmacol Immunotoxicol 2022; 45:386-394. [DOI: 10.1080/08923973.2022.2145966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Jiuhang Yu
- College of Pharmacy, Jiamusi University, Jiamusi, China
- Department of Pharmacy, Harbin Medical University Cancer Hospital, Harbin, China
| | - Yichuang Yin
- College of Pharmacy, Jiamusi University, Jiamusi, China
- Department of Pharmacy, Harbin Medical University Cancer Hospital, Harbin, China
| | - Yang Yu
- Department of Pharmacy, Harbin Medical University Cancer Hospital, Harbin, China
| | - Mengfei Cheng
- Department of Pharmacy, Harbin Medical University Cancer Hospital, Harbin, China
| | - Shuo Zhang
- Department of Pharmacy, Harbin Medical University Cancer Hospital, Harbin, China
| | - Shuai Jiang
- Department of Pharmacy, Harbin Medical University Cancer Hospital, Harbin, China
| | - Mei Dong
- College of Pharmacy, Jiamusi University, Jiamusi, China
- Department of Pharmacy, Harbin Medical University Cancer Hospital, Harbin, China
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7
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Koustas E, Trifylli EM, Sarantis P, Papadopoulos N, Aloizos G, Tsagarakis A, Damaskos C, Garmpis N, Garmpi A, Papavassiliou AG, Karamouzis MV. Implication of gut microbiome in immunotherapy for colorectal cancer. World J Gastrointest Oncol 2022; 14:1665-1674. [PMID: 36187397 PMCID: PMC9516653 DOI: 10.4251/wjgo.v14.i9.1665] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Revised: 05/09/2022] [Accepted: 08/01/2022] [Indexed: 02/05/2023] Open
Abstract
Colorectal cancer (CRC) constitutes the third most frequently reported malignancy in the male population and the second most common in women in the last two decades. Colon carcinogenesis is a complex, multifactorial event, resulting from genetic and epigenetic aberrations, the impact of environmental factors, as well as the disturbance of the gut microbial ecosystem. The relationship between the intestinal microbiome and carcinogenesis was relatively undervalued in the last decade. However, its remarkable effect on metabolic and immune functions on the host has been in the spotlight as of recent years. There is a strong relationship between gut microbiome dysbiosis, bowel pathogenicity and responsiveness to anti-cancer treatment; including immunotherapy. Modifications of bacteriome consistency are closely associated with the immunologic response to immunotherapeutic agents. This condition that implies the necessity of gut microbiome manipulation. Thus, creatingan optimal response for CRC patients to immunotherapeutic agents. In this paper, we will review the current literature observing how gut microbiota influence the response of immunotherapy on CRC patients.
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Affiliation(s)
- Evangelos Koustas
- Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, Athens 11527, Greece
| | - Eleni-Myrto Trifylli
- Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, Athens 11527, Greece
| | - Panagiotis Sarantis
- Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, Athens 11527, Greece
| | - Nikolaos Papadopoulos
- 1st Department of Internal Medicine, 417 Army Share Fund Hospital of Athens, Athens 11521, Attica, Greece
| | - Georgios Aloizos
- 1st Department of Internal Medicine, 417 Army Share Fund Hospital of Athens, Athens 11521, Attica, Greece
| | | | - Christos Damaskos
- N.S. Christeas Laboratory of Experimental Surgery and Surgical Research, Medical School, National and Kapodistrian University of Athens, Athens 11527, Greece
| | - Nikolaos Garmpis
- Second Department of Propedeutic Surgery, Laiko General Hospital, Medical School, National and Kapodistrian University of Athens, Athens 11527, Greece
| | - Anna Garmpi
- First Department of Pathology, Medical School, National and Kapodistrian University of Athens, Athens 11527, Greece
| | - Athanasios G Papavassiliou
- Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, Athens 11527, Greece
| | - Michalis V Karamouzis
- Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, Athens 11527, Greece
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8
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Tan B, Liu YX, Tang H, Chen D, Xu Y, Chen MJ, Li Y, Wang MZ, Qian JM. Gut microbiota shed new light on the management of immune-related adverse events. Thorac Cancer 2022; 13:2681-2691. [PMID: 36043345 PMCID: PMC9527168 DOI: 10.1111/1759-7714.14626] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Accepted: 08/11/2022] [Indexed: 11/30/2022] Open
Abstract
Immunotherapy has dramatically revolutionized the therapeutic landscape for patients with cancer. Although immune checkpoint inhibitors are now accepted as effective anticancer therapies, they introduce a novel class of toxicity, termed immune‐related adverse events, which can lead to the temporary or permanent discontinuation of immunotherapy and life‐threatening tumor progression. Therefore, the effective prevention and treatment of immune‐related adverse events is a clinical imperative to maximize the utility of immunotherapies. Immune‐related adverse events are related to the intestinal microbiota, baseline gut microbiota composition is an important determinant of immune checkpoint inhibitor‐related colitis, and antibiotics exacerbate these undesirable side‐effects. Supplementation with specific probiotics reduces immune checkpoint inhibitor‐related colitis in mice, and fecal microbiota transplantation has now been shown to effectively treat refractory immune checkpoint inhibitor‐related colitis in the clinic. Hence, modifying the microbiota holds great promise for preventing and treating immune‐related adverse events. Microbiomes and their metabolites play important roles in the potential underlying mechanisms through interactions with both innate and adaptive immune cells. Here we review the gut microbiota and immune regulation; the changes occurring in the microbiota during immune checkpoint inhibitor therapy; the relationship between the microbiota and immune‐related adverse events, antibiotics, probiotics/prebiotics, and fecal microbiota transplantation in immune checkpoint inhibitor‐related colitis; and the protective mechanisms mediated by the microbiome and metabolites in immune‐related adverse events.
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Affiliation(s)
- Bei Tan
- Department of Gastroenterology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Science, Beijing, China
| | - Yun-Xin Liu
- Medical Doctor Program, Peking Union Medical College & Chinese Academy of Medical Science, Beijing, China
| | - Hao Tang
- Department of Internal Medicine, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Science, Beijing, China
| | - Dan Chen
- Department of Gastroenterology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Science, Beijing, China
| | - Yan Xu
- Department of Respiratory and Critical Care Medicine, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Science, Beijing, China
| | - Min-Jiang Chen
- Department of Respiratory and Critical Care Medicine, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Science, Beijing, China
| | - Yue Li
- Department of Gastroenterology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Science, Beijing, China
| | - Meng-Zhao Wang
- Department of Respiratory and Critical Care Medicine, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Science, Beijing, China
| | - Jia-Ming Qian
- Department of Gastroenterology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Science, Beijing, China
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9
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Schemczssen-Graeff Z, Pileggi M. Probiotics and live biotherapeutic products aiming at cancer mitigation and patient recover. Front Genet 2022; 13:921972. [PMID: 36017495 PMCID: PMC9395637 DOI: 10.3389/fgene.2022.921972] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Accepted: 07/13/2022] [Indexed: 11/13/2022] Open
Abstract
Molecular biology techniques allowed access to non-culturable microorganisms, while studies using analytical chemistry, as Liquid Chromatography and Tandem Mass Spectrometry, showed the existence of a complex communication system among bacteria, signaled by quorum sensing molecules. These approaches also allowed the understanding of dysbiosis, in which imbalances in the microbiome diversity, caused by antibiotics, environmental toxins and processed foods, lead to the constitution of different diseases, as cancer. Colorectal cancer, for example, can originate by a dysbiosis configuration, which leads to biofilm formation, production of toxic metabolites, DNA damage in intestinal epithelial cells through the secretion of genotoxins, and epigenetic regulation of oncogenes. However, probiotic strains can also act in epigenetic processes, and so be use for recovering important intestinal functions and controlling dysbiosis and cancer mitigation through the metabolism of drugs used in chemotherapy, controlling the proliferation of cancer cells, improving the immune response of the host, regulation of cell differentiation and apoptosis, among others. There are still gaps in studies on the effectiveness of the use of probiotics, therefore omics and analytical chemistry are important approaches to understand the role of bacterial communication, formation of biofilms, and the effects of probiotics and microbiome on chemotherapy. The use of probiotics, prebiotics, synbiotics, and metabiotics should be considered as a complement to other more invasive and hazard therapies, such chemotherapy, surgery, and radiotherapy. The study of potential bacteria for cancer treatment, as the next-generation probiotics and Live Biotherapeutic Products, can have a controlling action in epigenetic processes, enabling the use of these bacteria for the mitigation of specific diseases through changes in the regulation of genes of microbiome and host. Thus, it is possible that a path of medicine in the times to come will be more patient-specific treatments, depending on the environmental, genetic, epigenetic and microbiome characteristics of the host.
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Affiliation(s)
- Zelinda Schemczssen-Graeff
- Comparative Immunology Laboratory, Department of Microbiology, Parasitology and Pathology, Federal University of Paraná, Curitiba, Brazil
| | - Marcos Pileggi
- Environmental Microbiology Laboratory, Structural and Molecular Biology and Genetics Department, Life Sciences and Health Institute, Ponta Grossa State University, Ponta Grossa, Brazil
- *Correspondence: Marcos Pileggi,
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10
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Li Y, Wang S, Lin M, Hou C, Li C, Li G. Analysis of interactions of immune checkpoint inhibitors with antibiotics in cancer therapy. Front Med 2022; 16:307-321. [PMID: 35648368 DOI: 10.1007/s11684-022-0927-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Accepted: 02/24/2022] [Indexed: 11/04/2022]
Abstract
The discovery of immune checkpoint inhibitors, such as PD-1/PD-L1 and CTLA-4, has played an important role in the development of cancer immunotherapy. However, immune-related adverse events often occur because of the enhanced immune response enabled by these agents. Antibiotics are widely applied in clinical treatment, and they are inevitably used in combination with immune checkpoint inhibitors. Clinical practice has revealed that antibiotics can weaken the therapeutic response to immune checkpoint inhibitors. Studies have shown that the gut microbiota is essential for the interaction between immune checkpoint inhibitors and antibiotics, although the exact mechanisms remain unclear. This review focuses on the interactions between immune checkpoint inhibitors and antibiotics, with an in-depth discussion about the mechanisms and therapeutic potential of modulating gut microbiota, as well as other new combination strategies.
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Affiliation(s)
- Yingying Li
- Pharmacy Department, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China
| | - Shiyuan Wang
- Pharmacy Department, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China
| | - Mengmeng Lin
- Pharmacy Department, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China
| | - Chunying Hou
- Pharmacy Department, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China
| | - Chunyu Li
- Pharmacy Department, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China.
| | - Guohui Li
- Pharmacy Department, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China.
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11
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Pagan L, Ederveen RAM, Huisman BW, Schoones JW, Zwittink RD, Schuren FHJ, Rissmann R, Piek JMJ, van Poelgeest MIE. The Human Vulvar Microbiome: A Systematic Review. Microorganisms 2021; 9:2568. [PMID: 34946169 PMCID: PMC8705571 DOI: 10.3390/microorganisms9122568] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 11/25/2021] [Accepted: 12/03/2021] [Indexed: 02/07/2023] Open
Abstract
The link between cancer and the microbiome is a fast-moving field in research. There is little knowledge on the microbiome in ((pre)malignant) conditions of the vulvar skin. This systematic review aims to provide an overview of the literature regarding the microbiome composition of the healthy vulvar skin and in (pre)malignant vulvar disease. This study was performed according to the PRISMA guidelines. A comprehensive, electronic search strategy was used to identify original research articles (updated September 2021). The inclusion criteria were articles using culture-independent methods for microbiome profiling of the vulvar region. Ten articles were included. The bacterial composition of the vulva consists of several genera including Lactobacillus, Corynebacterium, Staphylococcus and Prevotella, suggesting that the vulvar microbiome composition shows similarities with the corresponding vaginal milieu. However, the vulvar microbiome generally displayed higher diversity with commensals of cutaneous and fecal origin. This is the first systematic review that investigates the relationship between microbiome and vulvar (pre)malignant disease. There are limited data and the level of evidence is low with limitations in study size, population diversity and methodology. Nevertheless, the vulvar microbiome represents a promising field for exploring potential links for disease etiology and targets for therapy.
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Affiliation(s)
- Lisa Pagan
- Centre for Human Drug Research, 2333 CL Leiden, The Netherlands; (L.P.); (B.W.H.); (M.I.E.v.P.)
- Department of Gynecology and Obstetrics, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| | - Roos A. M. Ederveen
- Faculty of Health, Medicine and Life Sciences, Maastricht University Medical Centre, 6229 ER Maastricht, The Netherlands;
- Department of Obstetrics and Gynaecology and Catharina Cancer Institute, Catharina Ziekenhuis, Michelangelolaan 2, 5623 EJ Eindhoven, The Netherlands;
| | - Bertine W. Huisman
- Centre for Human Drug Research, 2333 CL Leiden, The Netherlands; (L.P.); (B.W.H.); (M.I.E.v.P.)
- Department of Gynecology and Obstetrics, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| | - Jan W. Schoones
- Directorate of Research Policy (Formerly: Walaeus Library), Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands;
| | - Romy D. Zwittink
- Center for Microbiome Analyses and Therapeutics, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands;
| | - Frank H. J. Schuren
- Netherlands Organisation for Applied Scientific Research, TNO, 3704 HE Zeist, The Netherlands;
- Leiden Skin Institute, 2333 CL Leiden, The Netherlands
| | - Robert Rissmann
- Centre for Human Drug Research, 2333 CL Leiden, The Netherlands; (L.P.); (B.W.H.); (M.I.E.v.P.)
- Leiden Skin Institute, 2333 CL Leiden, The Netherlands
- Leiden Amsterdam Center for Drug Research, Leiden University, 2300 RA Leiden, The Netherlands
| | - Jurgen M. J. Piek
- Department of Obstetrics and Gynaecology and Catharina Cancer Institute, Catharina Ziekenhuis, Michelangelolaan 2, 5623 EJ Eindhoven, The Netherlands;
| | - Mariëtte I. E. van Poelgeest
- Centre for Human Drug Research, 2333 CL Leiden, The Netherlands; (L.P.); (B.W.H.); (M.I.E.v.P.)
- Department of Gynecology and Obstetrics, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands
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12
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Chavez-Dominguez R, Perez-Medina M, Aguilar-Cazares D, Galicia-Velasco M, Meneses-Flores M, Islas-Vazquez L, Camarena A, Lopez-Gonzalez JS. Old and New Players of Inflammation and Their Relationship With Cancer Development. Front Oncol 2021; 11:722999. [PMID: 34881173 PMCID: PMC8645998 DOI: 10.3389/fonc.2021.722999] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Accepted: 11/04/2021] [Indexed: 12/18/2022] Open
Abstract
Pathogens or genotoxic agents continuously affect the human body. Acute inflammatory reaction induced by a non-sterile or sterile environment is triggered for the efficient elimination of insults that caused the damage. According to the insult, pathogen-associated molecular patterns, damage-associated molecular patterns, and homeostasis-altering molecular processes are released to facilitate the arrival of tissue resident and circulating cells to the injured zone to promote harmful agent elimination and tissue regeneration. However, when inflammation is maintained, a chronic phenomenon is induced, in which phagocytic cells release toxic molecules damaging the harmful agent and the surrounding healthy tissues, thereby inducing DNA lesions. In this regard, chronic inflammation has been recognized as a risk factor of cancer development by increasing the genomic instability of transformed cells and by creating an environment containing proliferation signals. Based on the cancer immunoediting concept, a rigorous and regulated inflammation process triggers participation of innate and adaptive immune responses for efficient elimination of transformed cells. When immune response does not eliminate all transformed cells, an equilibrium phase is induced. Therefore, excessive inflammation amplifies local damage caused by the continuous arrival of inflammatory/immune cells. To regulate the overstimulation of inflammatory/immune cells, a network of mechanisms that inhibit or block the cell overactivity must be activated. Transformed cells may take advantage of this process to proliferate and gradually grow until they become preponderant over the immune cells, preserving, increasing, or creating a microenvironment to evade the host immune response. In this microenvironment, tumor cells resist the attack of the effector immune cells or instruct them to sustain tumor growth and development until its clinical consequences. With tumor development, evolving, complex, and overlapping microenvironments are arising. Therefore, a deeper knowledge of cytokine, immune, and tumor cell interactions and their role in the intricated process will impact the combination of current or forthcoming therapies.
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Affiliation(s)
- Rodolfo Chavez-Dominguez
- Departamento de Enfermedades Cronico-Degenerativas, Instituto Nacional de Enfermedades Respiratorias "Ismael Cosio Villegas", Mexico City, Mexico.,Posgrado en Ciencias Biologicas, Universidad Nacional Autonoma de Mexico, Mexico City, Mexico
| | - Mario Perez-Medina
- Departamento de Enfermedades Cronico-Degenerativas, Instituto Nacional de Enfermedades Respiratorias "Ismael Cosio Villegas", Mexico City, Mexico.,Laboratorio de Quimioterapia Experimental, Departamento de Bioquímica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City, Mexico
| | - Dolores Aguilar-Cazares
- Departamento de Enfermedades Cronico-Degenerativas, Instituto Nacional de Enfermedades Respiratorias "Ismael Cosio Villegas", Mexico City, Mexico
| | - Miriam Galicia-Velasco
- Departamento de Enfermedades Cronico-Degenerativas, Instituto Nacional de Enfermedades Respiratorias "Ismael Cosio Villegas", Mexico City, Mexico
| | - Manuel Meneses-Flores
- Departamento de Patología, Instituto Nacional de Enfermedades Respiratorias "Ismael Cosio Villegas", Mexico City, Mexico
| | - Lorenzo Islas-Vazquez
- Departamento de Enfermedades Cronico-Degenerativas, Instituto Nacional de Enfermedades Respiratorias "Ismael Cosio Villegas", Mexico City, Mexico
| | - Angel Camarena
- Laboratorio de Human Leukocyte Antigen (HLA), Instituto Nacional de Enfermedades Respiratorias "Ismael Cosio Villegas", Mexico City, Mexico
| | - Jose S Lopez-Gonzalez
- Departamento de Enfermedades Cronico-Degenerativas, Instituto Nacional de Enfermedades Respiratorias "Ismael Cosio Villegas", Mexico City, Mexico
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13
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Yang D, Wang X, Zhou X, Zhao J, Yang H, Wang S, Morse MA, Wu J, Yuan Y, Li S, Hobeika A, Lyerly HK, Ren J. Blood microbiota diversity determines response of advanced colorectal cancer to chemotherapy combined with adoptive T cell immunotherapy. Oncoimmunology 2021; 10:1976953. [PMID: 34595059 PMCID: PMC8477924 DOI: 10.1080/2162402x.2021.1976953] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 08/18/2021] [Accepted: 09/01/2021] [Indexed: 12/17/2022] Open
Abstract
Human microbiota influence the response of malignancies to treatment with immune checkpoint blockade; however, their impact on other forms of immunotherapy is poorly understood. This study explored the effect of blood microbiota on clinical efficacy, represented by progression-free survival (PFS) and overall survival (OS), of combined chemotherapy and adoptive cellular therapy (ACT) in advanced colon cancer patients. Plasma was collected from colorectal cancer patients (CRC) treated with either chemotherapy alone (oxaliplatin and capecitabine) (XELOX CT alone group, n = 19), or ACT with a mixed dendritic cell/cytokine-induced killer cell product (DC-CIK) + XELOX (ICT group, n = 20). Circulating microbiota analysis was performed by PCR amplification and next-generation sequencing of variable regions V3~V4 of bacterial 16S rRNA genes. The association of the blood microbial diversity with clinical response to the therapy as measured by RECIST1.1 and OS was evaluated. The baseline Chao index of blood microbial diversity predicted prolonged PFS and OS of DC/CIK immunotherapy. More diverse blood microbiota that included Bifidobacterium, Lactobacillus, and Enterococcus were identified among responders to DC/CIK compared with non-responders. The plasma bacterial DNA copy number is inversely correlated with the CD3-/CD16+/CD56+ NK cells in circulation and decreased following DC-CIK; however, the Chao index of plasma microbiota significantly increased after administration of the DC-CIK product and this subsequent change was correlated with the number of CD3-/CD16+/CD56+ and CD8+/CD28+ cells infused. The diversity of the blood microbiome is a promising predictive marker for clinical responses to chemotherapy combined with DC-CIK. Cellular immunotherapy can affect the plasma microbiota's diversity in a manner favorable to clinical responses.
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Affiliation(s)
- Duo Yang
- Department of Therapeutic Cancer Vaccines and Medical OncologyBeijing Shijitan Hospital, Capital Medical University, Beijing Key Laboratory for Therapeutic Cancer Vaccines, Beijing, China
| | - Xiaoli Wang
- Department of Therapeutic Cancer Vaccines and Medical OncologyBeijing Shijitan Hospital, Capital Medical University, Beijing Key Laboratory for Therapeutic Cancer Vaccines, Beijing, China
| | - Xinna Zhou
- Department of Therapeutic Cancer Vaccines and Medical OncologyBeijing Shijitan Hospital, Capital Medical University, Beijing Key Laboratory for Therapeutic Cancer Vaccines, Beijing, China
| | - Jing Zhao
- Department of Therapeutic Cancer Vaccines and Medical OncologyBeijing Shijitan Hospital, Capital Medical University, Beijing Key Laboratory for Therapeutic Cancer Vaccines, Beijing, China
| | - Huabing Yang
- Department of Medical Oncology, Fudan University Pudong Medical Center, Shanghai, China
| | - Shuo Wang
- Department of Therapeutic Cancer Vaccines and Medical OncologyBeijing Shijitan Hospital, Capital Medical University, Beijing Key Laboratory for Therapeutic Cancer Vaccines, Beijing, China
| | - Michael A. Morse
- Department of Surgery, Duke University Medical Center, Durham, NC, USA
| | - Jiangping Wu
- Department of Therapeutic Cancer Vaccines and Medical OncologyBeijing Shijitan Hospital, Capital Medical University, Beijing Key Laboratory for Therapeutic Cancer Vaccines, Beijing, China
| | - Yanhua Yuan
- Department of Medical Oncology, Fudan University Pudong Medical Center, Shanghai, China
| | - Sha Li
- Department of Therapeutic Cancer Vaccines and Medical OncologyBeijing Shijitan Hospital, Capital Medical University, Beijing Key Laboratory for Therapeutic Cancer Vaccines, Beijing, China
| | - Amy Hobeika
- Department of Surgery, Duke University Medical Center, Durham, NC, USA
| | | | - Jun Ren
- Department of Medical Oncology, Fudan University Pudong Medical Center, Shanghai, China
- Department of Surgery, Duke University Medical Center, Durham, NC, USA
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14
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Naqash AR, Kihn-Alarcón AJ, Stavraka C, Kerrigan K, Maleki Vareki S, Pinato DJ, Puri S. The role of gut microbiome in modulating response to immune checkpoint inhibitor therapy in cancer. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:1034. [PMID: 34277834 PMCID: PMC8267312 DOI: 10.21037/atm-20-6427] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 01/12/2021] [Indexed: 12/16/2022]
Abstract
Immunotherapy has led to a paradigm shift in the treatment of several cancers. There have been significant efforts to identify biomarkers that can predict response and toxicities related to immune checkpoint inhibitor (ICPI) therapy. Despite these advances, it has been challenging to tease out why a subset of patients benefit more than others or why certain patients experience immune-related adverse events (irAEs). Although the immune-modulating properties of the human gut bacterial ecosystem are yet to be fully elucidated, there has been growing interest in evaluating the role of the gut microbiome in shaping the therapeutic response to cancer immunotherapy. Considerable research efforts are currently directed to utilizing metagenomic and metabolic profiling of stool microbiota in patients on ICPI-based therapies. Dysbiosis or loss of microbial diversity has been associated with a poor treatment response to ICPIs and worse survival outcomes in cancer patients. Emerging data have shown that certain bacterial strains, such as Faecalibacterium that confer sensitivity to ICPI, also have a higher propensity to increase the risk of irAEs. Additionally, the microbiome can modulate the local immune response at the intestinal interface and influence the trafficking of bacterial peptide primed T-cells distally, influencing the toxicity patterns to ICPI. Antibiotic or diet induced alterations in composition of the microbiome can also indirectly alter the production of certain bacterial metabolites such as deoxycholate and short chain fatty acids that can influence the anti-tumor tolerogenesis. Gaining sufficient understanding of the exact mechanisms underpinning the interplay between ICPI induced anti-tumor immunity and the immune modulatory role gut microbiome can be vital in identifying potential avenues of improving outcomes to cancer immunotherapy. In the current review, we have summarized and highlighted the key emerging data supporting the role of gut microbiome in regulating response to ICPIs in cancer.
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Affiliation(s)
- Abdul Rafeh Naqash
- Department of Investigational Cancer Therapeutics, National Cancer Institute, Bethesda, MD, USA
| | - Alba J Kihn-Alarcón
- Department of Research, Liga Nacional Contra el Cáncer & Instituto de Cancerología, Guatemala City, Guatemala
| | - Chara Stavraka
- Department of Medical Oncology, Guy's and St Thomas' NHS Foundation Trust, Great Maze Pond, London, UK
| | - Kathleen Kerrigan
- Division of Medical Oncology Huntsman Cancer Institute at the University of Utah, Salt Lake City, UT, USA
| | - Saman Maleki Vareki
- Division of Experimental Oncology, Department of Oncology, University of Western Ontario, London, ON, Canada.,Department of Pathology and Laboratory Medicine, University of Western Ontario, London, ON, Canada.,Cancer Research Laboratory Program, Lawson Health Research Institute, London, ON, Canada
| | | | - Sonam Puri
- Division of Medical Oncology Huntsman Cancer Institute at the University of Utah, Salt Lake City, UT, USA
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15
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Varayathu H, Sarathy V, Thomas BE, Mufti SS, Naik R. Combination Strategies to Augment Immune Check Point Inhibitors Efficacy - Implications for Translational Research. Front Oncol 2021; 11:559161. [PMID: 34123767 PMCID: PMC8193928 DOI: 10.3389/fonc.2021.559161] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 04/30/2021] [Indexed: 12/22/2022] Open
Abstract
Immune checkpoint inhibitor therapy has revolutionized the field of cancer immunotherapy. Even though it has shown a durable response in some solid tumors, several patients do not respond to these agents, irrespective of predictive biomarker (PD-L1, MSI, TMB) status. Multiple preclinical, as well as early-phase clinical studies are ongoing for combining immune checkpoint inhibitors with anti-cancer and/or non-anti-cancer drugs for beneficial therapeutic interactions. In this review, we discuss the mechanistic basis behind the combination of immune checkpoint inhibitors with other drugs currently being studied in early phase clinical studies including conventional chemotherapy drugs, metronomic chemotherapy, thalidomide and its derivatives, epigenetic therapy, targeted therapy, inhibitors of DNA damage repair, other small molecule inhibitors, anti-tumor antibodies hormonal therapy, multiple checkpoint Inhibitors, microbiome therapeutics, oncolytic viruses, radiotherapy, drugs targeting myeloid-derived suppressor cells, drugs targeting Tregs, drugs targeting renin-angiotensin system, drugs targeting the autonomic nervous system, metformin, etc. We also highlight how translational research strategies can help better understand the true therapeutic potential of such combinations.
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Affiliation(s)
- Hrishi Varayathu
- Department of Translational Medicine and Therapeutics, HealthCare Global Enterprises Limited, Bangalore, India
| | - Vinu Sarathy
- Department of Medical Oncology, HealthCare Global Enterprises Limited, Bangalore, India
| | - Beulah Elsa Thomas
- Department of Clinical Pharmacology, HealthCare Global Enterprises Limited, Bangalore, India
| | - Suhail Sayeed Mufti
- Department of Translational Medicine and Therapeutics, HealthCare Global Enterprises Limited, Bangalore, India
| | - Radheshyam Naik
- Department of Medical Oncology, HealthCare Global Enterprises Limited, Bangalore, India
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16
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Abbasi A, Rad AH, Ghasempour Z, Sabahi S, Kafil HS, Hasannezhad P, Rahbar Saadat Y, Shahbazi N. The biological activities of postbiotics in gastrointestinal disorders. Crit Rev Food Sci Nutr 2021; 62:5983-6004. [PMID: 33715539 DOI: 10.1080/10408398.2021.1895061] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
According to outcomes from clinical studies, an intricate relationship occurs between the beneficial microbiota, gut homeostasis, and the host's health status. Numerous studies have confirmed the health-promoting effects of probiotics, particularly in gastrointestinal diseases. On the other hand, the safety issues regarding the consumption of some probiotics are still a matter of debate, thus to overcome the problems related to the application of live probiotic cells in terms of clinical, technological, and economic aspects, microbial-derived biomolecules (postbiotics) were introducing as a potential alternative agent. Presently scientific literature confirms that the postbiotic components can be used as promising tools for both prevention and treatment strategies in gastrointestinal disorders with less undesirable side-effects, particularly in infants and children. Future head-to-head trials are required to distinguish appropriate strains of parent cells, optimal dosages of postbiotics, and assessment of the cost-effectiveness of postbiotics compared to alternative drugs. This review provides an overview of the concept and safety issues regarding postbiotics, with emphasis on their biological role in the treatment of some important gastrointestinal disorders.
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Affiliation(s)
- Amin Abbasi
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Food Science and Technology, Faculty of Nutrition & Food Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Aziz Homayouni Rad
- Department of Food Science and Technology, Faculty of Nutrition & Food Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Zahra Ghasempour
- Department of Food Science and Technology, Faculty of Nutrition & Food Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Sahar Sabahi
- Department of Nutritional Sciences, School of Paramedical Sciences, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Hossein Samadi Kafil
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Paniz Hasannezhad
- Department of Medical Engineering Science, University College of Rouzbahan, Sari, Iran
| | - Yalda Rahbar Saadat
- Nutrition Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Nayyer Shahbazi
- Faculty of Agriculture Engineering, Department of Food Science, Shahrood University of Technology, Shahrood, Iran
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17
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Vazhappilly CG, Amararathna M, Cyril AC, Linger R, Matar R, Merheb M, Ramadan WS, Radhakrishnan R, Rupasinghe HPV. Current methodologies to refine bioavailability, delivery, and therapeutic efficacy of plant flavonoids in cancer treatment. J Nutr Biochem 2021; 94:108623. [PMID: 33705948 DOI: 10.1016/j.jnutbio.2021.108623] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 01/21/2021] [Accepted: 02/28/2021] [Indexed: 02/06/2023]
Abstract
Over the last two decades, several advancements have been made to improve the therapeutic efficacy of plant flavonoids, especially in cancer treatment. Factors such as low bioavailability, poor flavonoid stability and solubility, ineffective targeted delivery, and chemo-resistance hinder the application of flavonoids in anti-cancer therapy. Many anti-cancer compounds failed in the clinical trials because of unexpected altered clearance of flavonoids, poor absorption after administration, low efficacy, and/or adverse effects. Hence, the current research strategies are focused on improving the therapeutic efficacy of plant flavonoids, especially by enhancing their bioavailability through combination therapy, engineering gut microbiota, regulating flavonoids interaction with adenosine triphosphate binding cassette efflux transporters, and efficient delivery using nanocrystal and encapsulation technologies. This review aims to discuss different methodologies with examples from reported dietary flavonoids that showed an enhanced anti-cancer efficacy in both in vitro and in vivo models. Further, the review discusses the recent progress in biochemical modifications of flavonoids to improve bioavailability, solubility, and therapeutic efficacy.
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Affiliation(s)
| | - Madumani Amararathna
- Department of Plant, Food, and Environmental Sciences, Faculty of Agriculture, Dalhousie University, Truro, Nova Scotia, Canada
| | - Asha Caroline Cyril
- College of Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai, UAE
| | - Rebecca Linger
- Department of Pharmaceutical and Administrative Sciences, University of Charleston, Charleston, West Virginia, USA
| | - Rachel Matar
- Department of Biotechnology, American University of Ras Al Khaimah, Ras Al Khaimah, UAE
| | - Maxime Merheb
- Department of Biotechnology, American University of Ras Al Khaimah, Ras Al Khaimah, UAE
| | - Wafaa S Ramadan
- Sharjah Institute for Medical Research, University of Sharjah, Sharjah, UAE; College of Medicine, University of Sharjah, Sharjah, UAE
| | - Rajan Radhakrishnan
- College of Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai, UAE
| | - H P Vasantha Rupasinghe
- Department of Plant, Food, and Environmental Sciences, Faculty of Agriculture, Dalhousie University, Truro, Nova Scotia, Canada; Department of Pathology, Faculty of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada
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18
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Liu W, Wang Y, Luo J, Liu M, Luo Z. Pleiotropic Effects of Metformin on the Antitumor Efficiency of Immune Checkpoint Inhibitors. Front Immunol 2021; 11:586760. [PMID: 33603734 PMCID: PMC7884468 DOI: 10.3389/fimmu.2020.586760] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 12/16/2020] [Indexed: 01/01/2023] Open
Abstract
Cancer is an important threat to public health because of its high morbidity and mortality. In recent decades, immune checkpoint inhibitors (ICIs) have ushered a new therapeutic era in clinical oncology. The rapid development of immune checkpoint therapy is due to its inspiring clinical efficacy in a group of cancer types. Metformin, an effective agent for the management of type 2 diabetes mellitus (T2DM), has shown beneficial effects on cancer prevention and cancer treatment. Emerging studies have suggested that metformin in combination with ICI treatment could improve the anticancer effects of ICIs. Hence, we conducted a review to summarize the effects of metformin on ICI therapy. We also review the pleiotropic mechanisms of metformin combined with ICIs in cancer therapy, including its direct and indirect effects on the host immune system.
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Affiliation(s)
- Wenhui Liu
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, China.,Institute of Clinical Pharmacy, Central South University, Changsha, China
| | - Ying Wang
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, China.,Institute of Clinical Pharmacy, Central South University, Changsha, China
| | - Jianquan Luo
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, China.,Institute of Clinical Pharmacy, Central South University, Changsha, China
| | - Mouze Liu
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, China.,Institute of Clinical Pharmacy, Central South University, Changsha, China
| | - Zhiying Luo
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, China.,Institute of Clinical Pharmacy, Central South University, Changsha, China
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19
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Lu PH, Tsai TC, Chang JWC, Deng ST, Cheng CY. Association of prior fluoroquinolone treatment with survival outcomes of immune checkpoint inhibitors in Asia. J Clin Pharm Ther 2020; 46:408-414. [PMID: 33332621 DOI: 10.1111/jcpt.13298] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 08/28/2020] [Accepted: 09/30/2020] [Indexed: 01/22/2023]
Abstract
WHAT IS KNOWN AND OBJECTIVE Gut microbiota plays an important role in shaping immune responses. Several studies have reported that antibiotics may alter gut microbiota diversity and compromise the therapeutic response to immune checkpoint inhibitors (ICIs). Nevertheless, the impact of a specific class of antibiotics on ICIs therapy is still not known. The aim of this study was to analyse the influence of antibiotics on the clinical outcomes of non-small cell lung cancer (NSCLC) patients treated with ICIs and to compare the effects of fluoroquinolones vs. other broad-spectrum antibiotics. METHODS This retrospective cohort study (n = 340) analysed data from Chang Gung Research Database, which comprises work from seven medical institutions in Taiwan. Patients with NSCLC who received ICIs between January 2016 and March 2019 were evaluated. The data of patients who received antibiotics (ie fluoroquinolone) within 30 days prior to ICIs therapy were analysed. Overall survival (OS) was the goal of our study and was calculated from the time the ICIs therapy start. Survival analysis was estimated using the Kaplan-Meier and Cox statistics. RESULTS A total of 340 patients were identified for analysis. Of the 340 patients, only over one third (38%) of patients received antibiotics 30 days prior to ICI therapy. These patients exhibited a shorter OS compared with those not receiving antibiotics (median OS, 266 days vs. 455 days; hazard ratio (HR), 2.9; 95% confidence interval (CI), 1.1-8.1, p = 0.003). In this study, 127 out of 128 patients who were exposed to antibiotics had received at least one broad-spectrum antibiotic. We observed patients who had received fluoroquinolone had a shorter OS compared with those receiving other broad-spectrum antibiotics (median OS, 121 days vs. 370 days; HR, 1.582; 95% CI 1.007-2.841; p = 0.047). WHAT IS NEW AND CONCLUSION Antibiotic treatment, especially fluoroquinolone, prior to ICIs therapy was associated with poorer clinical efficacy in NSCLC patients. Antibiotics should not be withheld when there is a clear need for them despite the possibility of interfering with the microbiome, which may, in turn, adversely affect the ICI's effectiveness. However, one should consider avoiding the use of fluoroquinolones antibiotics.
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Affiliation(s)
- Po-Hsien Lu
- Department of Pharmacy, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - Tzu-Cheng Tsai
- Department of Pharmacy, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - John Wen-Cheng Chang
- Division of Hematology-Oncology, Department of Internal Medicine, Chang Gung Memorial Hospital at Linkou, Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Shin-Tarng Deng
- Department of Pharmacy, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - Chi-Yuan Cheng
- Department of Pharmacy, Chang Gung Memorial Hospital, Linkou, Taiwan
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Sampsell K, Hao D, Reimer RA. The Gut Microbiota: A Potential Gateway to Improved Health Outcomes in Breast Cancer Treatment and Survivorship. Int J Mol Sci 2020; 21:E9239. [PMID: 33287442 PMCID: PMC7731103 DOI: 10.3390/ijms21239239] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 11/28/2020] [Accepted: 12/01/2020] [Indexed: 12/14/2022] Open
Abstract
Breast cancer is the most frequently diagnosed cancer in women worldwide. The disease and its treatments exert profound effects on an individual's physical and mental health. There are many factors that impact an individual's risk of developing breast cancer, their response to treatments, and their risk of recurrence. The community of microorganisms inhabiting the gastrointestinal tract, the gut microbiota, affects human health through metabolic, neural, and endocrine signaling, and immune activity. It is through these mechanisms that the gut microbiota appears to influence breast cancer risk, response to treatment, and recurrence. A disrupted gut microbiota or state of 'dysbiosis' can contribute to a biological environment associated with higher risk for cancer development as well as contribute to negative treatment side-effects. Many cancer treatments have been shown to shift the gut microbiota toward dysbiosis; however, the microbiota can also be positively manipulated through diet, prebiotic and probiotic supplementation, and exercise. The objective of this review is to provide an overview of the current understanding of the relationship between the gut microbiota and breast cancer and to highlight potential strategies for modulation of the gut microbiota that could lead to improved clinical outcomes and overall health in this population.
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Affiliation(s)
- Kara Sampsell
- Faculty of Kinesiology, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada;
| | - Desirée Hao
- Department of Medical Oncology, Tom Baker Cancer Centre and Cumming School of Medicine, 3330 Hospital Drive NW, Calgary, AB T2N 4N1, Canada;
| | - Raylene A. Reimer
- Faculty of Kinesiology, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada;
- Department of Biochemistry & Molecular Biology, Cumming School of Medicine, University of Calgary, 3330 Hospital Drive NW, Calgary, AB T2N 4N1, Canada
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21
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Homayouni Rad A, Aghebati Maleki L, Samadi Kafil H, Fathi Zavoshti H, Abbasi A. Postbiotics as Promising Tools for Cancer Adjuvant Therapy. Adv Pharm Bull 2020; 11:1-5. [PMID: 33747846 PMCID: PMC7961229 DOI: 10.34172/apb.2021.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 02/15/2020] [Accepted: 04/16/2020] [Indexed: 12/13/2022] Open
Abstract
As many investigations have reported, there is a complicated relation between fermented foods, lactic acid bacteria (LAB), and human health. It seems that bioactive components such as prebiotics, probiotics, and postbiotics are key mediators of the complex and direct association between these factors. LAB activity in the matrix of fermented foods and improving their growth by prebiotic compounds ultimately results in the production of bioactive molecules (postbiotics), which possess specific biological and physiological properties. The term "postbiotics" refers to a complex of biological micro- and macromolecules, if consumed in adequate amounts, provides the host with different health-promoting effects. Different reports have suggested that postbiotics possess the ability to moderate the effectiveness of cancer treatment and reduce the side-effects of conventional therapies in cancer patients due to their anti-proliferative, anti-inflammatory and anti-cancer properties. Consequently, postbiotics, for their unique characteristics, have gained great scientific attention and are considered as a novel approach for adjuvant therapy in patients with cancer.
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Affiliation(s)
- Aziz Homayouni Rad
- Nutrition Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Hossein Samadi Kafil
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hamideh Fathi Zavoshti
- Department of Food Hygiene and Aquatics, Faculty of Veterinary Medicine, Tabriz University, Tabriz, Iran
| | - Amin Abbasi
- Student's Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
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22
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Schwartz DJ, Langdon AE, Dantas G. Understanding the impact of antibiotic perturbation on the human microbiome. Genome Med 2020; 12:82. [PMID: 32988391 PMCID: PMC7523053 DOI: 10.1186/s13073-020-00782-x] [Citation(s) in RCA: 149] [Impact Index Per Article: 37.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 09/11/2020] [Indexed: 02/08/2023] Open
Abstract
The human gut microbiome is a dynamic collection of bacteria, archaea, fungi, and viruses that performs essential functions for immune development, pathogen colonization resistance, and food metabolism. Perturbation of the gut microbiome's ecological balance, commonly by antibiotics, can cause and exacerbate diseases. To predict and successfully rescue such perturbations, first, we must understand the underlying taxonomic and functional dynamics of the microbiome as it changes throughout infancy, childhood, and adulthood. We offer an overview of the healthy gut bacterial architecture over these life stages and comment on vulnerability to short and long courses of antibiotics. Second, the resilience of the microbiome after antibiotic perturbation depends on key characteristics, such as the nature, timing, duration, and spectrum of a course of antibiotics, as well as microbiome modulatory factors such as age, travel, underlying illness, antibiotic resistance pattern, and diet. In this review, we discuss acute and chronic antibiotic perturbations to the microbiome and resistome in the context of microbiome stability and dynamics. We specifically discuss key taxonomic and resistance gene changes that accompany antibiotic treatment of neonates, children, and adults. Restoration of a healthy gut microbial ecosystem after routine antibiotics will require rationally managed exposure to specific antibiotics and microbes. To that end, we review the use of fecal microbiota transplantation and probiotics to direct recolonization of the gut ecosystem. We conclude with our perspectives on how best to assess, predict, and aid recovery of the microbiome after antibiotic perturbation.
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Affiliation(s)
- D. J. Schwartz
- Department of Pediatrics, Division of Infectious Diseases, Washington University School of Medicine in St. Louis, St. Louis, MO 63110 USA
- The Edison Family Center for Genome Sciences & Systems Biology, Washington University School of Medicine in St. Louis, St. Louis, MO 63110 USA
| | - A. E. Langdon
- The Edison Family Center for Genome Sciences & Systems Biology, Washington University School of Medicine in St. Louis, St. Louis, MO 63110 USA
- Department of Pathology and Immunology, Division of Laboratory and Genomic Medicine, Washington University School of Medicine in St. Louis, St. Louis, MO 63110 USA
| | - G. Dantas
- The Edison Family Center for Genome Sciences & Systems Biology, Washington University School of Medicine in St. Louis, St. Louis, MO 63110 USA
- Department of Pathology and Immunology, Division of Laboratory and Genomic Medicine, Washington University School of Medicine in St. Louis, St. Louis, MO 63110 USA
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO 63110 USA
- Department of Molecular Microbiology, Washington University School of Medicine in St. Louis, St. Louis, MO 63110 USA
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23
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Rosa BA, Mihindukulasuriya K, Hallsworth-Pepin K, Wollam A, Martin J, Snowden C, Dunne WM, Weinstock GM, Burnham CA, Mitreva M. Improving Characterization of Understudied Human Microbiomes Using Targeted Phylogenetics. mSystems 2020; 5:e00096-20. [PMID: 32098835 PMCID: PMC7043343 DOI: 10.1128/msystems.00096-20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 02/08/2020] [Indexed: 02/07/2023] Open
Abstract
Whole-genome bacterial sequences are required to better understand microbial functions, niche-specific bacterial metabolism, and disease states. Although genomic sequences are available for many of the human-associated bacteria from commonly tested body habitats (e.g., feces), as few as 13% of bacterium-derived reads from other sites such as the skin map to known bacterial genomes. To facilitate a better characterization of metagenomic shotgun reads from underrepresented body sites, we collected over 10,000 bacterial isolates originating from 14 human body habitats, identified novel taxonomic groups based on full-length 16S rRNA gene sequences, clustered the sequences to ensure that no individual taxonomic group was overselected for sequencing, prioritized bacteria from underrepresented body sites (such as skin and respiratory and urinary tracts), and sequenced and assembled genomes for 665 new bacterial strains. Here, we show that addition of these genomes improved read mapping rates of Human Microbiome Project (HMP) metagenomic samples by nearly 30% for the previously underrepresented phylum Fusobacteria, and 27.5% of the novel genomes generated here had high representation in at least one of the tested HMP samples, compared to 12.5% of the sequences in the public databases, indicating an enrichment of useful novel genomic sequences resulting from the prioritization procedure. As our understanding of the human microbiome continues to improve and to enter the realm of therapy developments, targeted approaches such as this to improve genomic databases will increase in importance from both an academic and a clinical perspective.IMPORTANCE The human microbiome plays a critically important role in health and disease, but current understanding of the mechanisms underlying the interactions between the varying microbiome and the different host environments is lacking. Having access to a database of fully sequenced bacterial genomes provides invaluable insights into microbial functions, but currently sequenced genomes for the human microbiome have largely come from a limited number of body sites (primarily feces), while other sites such as the skin, respiratory tract, and urinary tract are underrepresented, resulting in as little as 13% of bacterium-derived reads mapping to known bacterial genomes. Here, we sequenced and assembled 665 new bacterial genomes, prioritized from a larger database to select underrepresented body sites and bacterial taxa in the existing databases. As a result, we substantially improve mapping rates for samples from the Human Microbiome Project and provide an important contribution to human bacterial genomic databases for future studies.
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Affiliation(s)
- Bruce A Rosa
- McDonnell Genome Institute at Washington University, St. Louis, Missouri, USA
- Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | | | | | - Aye Wollam
- McDonnell Genome Institute at Washington University, St. Louis, Missouri, USA
| | - John Martin
- McDonnell Genome Institute at Washington University, St. Louis, Missouri, USA
| | - Caroline Snowden
- McDonnell Genome Institute at Washington University, St. Louis, Missouri, USA
| | - William Michael Dunne
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - George M Weinstock
- The Jackson Laboratory for Genomic Medicine, Farmington, Connecticut, USA
| | - C A Burnham
- Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Makedonka Mitreva
- McDonnell Genome Institute at Washington University, St. Louis, Missouri, USA
- Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
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Lin TL, Shu CC, Lai WF, Tzeng CM, Lai HC, Lu CC. Investiture of next generation probiotics on amelioration of diseases – Strains do matter. MEDICINE IN MICROECOLOGY 2019. [DOI: 10.1016/j.medmic.2019.100002] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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