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Whitmore M, Tobin I, Burkardt A, Zhang G. Nutritional Modulation of Host Defense Peptide Synthesis: A Novel Host-Directed Antimicrobial Therapeutic Strategy? Adv Nutr 2024; 15:100277. [PMID: 39053604 DOI: 10.1016/j.advnut.2024.100277] [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: 02/28/2024] [Revised: 06/11/2024] [Accepted: 07/19/2024] [Indexed: 07/27/2024] Open
Abstract
The escalating threat of antimicrobial resistance underscores the imperative for innovative therapeutic strategies. Host defense peptides (HDPs), integral components of innate immunity, exhibit profound antimicrobial and immunomodulatory properties. Various dietary compounds, such as short-chain fatty acids, vitamins, minerals, sugars, amino acids, phytochemicals, bile acids, probiotics, and prebiotics have been identified to enhance the synthesis of endogenous HDPs without provoking inflammatory response or compromising barrier integrity. Additionally, different classes of these compounds synergize in augmenting HDP synthesis and disease resistance. Moreover, dietary supplementation of several HDP-inducing compounds or their combinations have demonstrated robust protection in rodents, rabbits, pigs, cattle, and chickens from experimental infections. However, the efficacy of these compounds in inducing HDP synthesis varies considerably among distinct compounds. Additionally, the regulation of HDP genes occurs in a gene-specific, cell type-specific, and species-specific manner. In this comprehensive review, we systematically summarized the modulation of HDP synthesis and the mechanism of action attributed to each major class of dietary compounds, including their synergistic combinations, across a spectrum of animal species including humans. We argue that the ability to enhance innate immunity and barrier function without triggering inflammation or microbial resistance positions the nutritional modulation of endogenous HDP synthesis as a promising host-directed approach for mitigating infectious diseases and antimicrobial resistance. These HDP-inducing compounds, particularly in combinations, harbor substantial clinical potential for further exploration in antimicrobial therapies for both human and other animals.
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Affiliation(s)
- Melanie Whitmore
- Department of Animal and Food Sciences, Oklahoma State University, Stillwater, OK, United States
| | - Isabel Tobin
- Department of Animal and Food Sciences, Oklahoma State University, Stillwater, OK, United States
| | - Amanda Burkardt
- Department of Animal and Food Sciences, Oklahoma State University, Stillwater, OK, United States
| | - Guolong Zhang
- Department of Animal and Food Sciences, Oklahoma State University, Stillwater, OK, United States.
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Mann ER, Lam YK, Uhlig HH. Short-chain fatty acids: linking diet, the microbiome and immunity. Nat Rev Immunol 2024:10.1038/s41577-024-01014-8. [PMID: 38565643 DOI: 10.1038/s41577-024-01014-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/23/2024] [Indexed: 04/04/2024]
Abstract
The short-chain fatty acids (SCFAs) butyrate, propionate and acetate are microbial metabolites and their availability in the gut and other organs is determined by environmental factors, such as diet and use of antibiotics, that shape the diversity and metabolism of the microbiota. SCFAs regulate epithelial barrier function as well as mucosal and systemic immunity via evolutionary conserved processes that involve G protein-coupled receptor signalling or histone deacetylase activity. Indicatively, the anti-inflammatory role of butyrate is mediated through direct effects on the differentiation of intestinal epithelial cells, phagocytes, B cells and plasma cells, and regulatory and effector T cells. Intestinally derived SCFAs also directly and indirectly affect immunity at extra-intestinal sites, such as the liver, the lungs, the reproductive tract and the brain, and have been implicated in a range of disorders, including infections, intestinal inflammation, autoimmunity, food allergies, asthma and responses to cancer therapies. An ecological understanding of microbial communities and their interrelated metabolic states, as well as the engineering of butyrogenic bacteria may support SCFA-focused interventions for the prevention and treatment of immune-mediated diseases.
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Affiliation(s)
- Elizabeth R Mann
- Lydia Becker Institute of Immunology and Inflammation, Faculty of Biology Medicine and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - Ying Ka Lam
- Translational Gastroenterology Unit, University of Oxford, Oxford, UK
| | - Holm H Uhlig
- Translational Gastroenterology Unit, University of Oxford, Oxford, UK.
- Department of Paediatrics, University of Oxford, Oxford, UK.
- Oxford Biomedical Research Centre, University of Oxford, Oxford, UK.
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Wang A, Guan B, Zhang H, Xu H. Danger-associated metabolites trigger metaflammation: A crowbar in cardiometabolic diseases. Pharmacol Res 2023; 198:106983. [PMID: 37931790 DOI: 10.1016/j.phrs.2023.106983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 10/12/2023] [Accepted: 11/03/2023] [Indexed: 11/08/2023]
Abstract
Cardiometabolic diseases (CMDs) are characterized by a series of metabolic disorders and chronic low-grade inflammation. CMDs contribute to a high burden of mortality and morbidity worldwide. Host-microbial metabolic regulation that triggers metaflammation is an emerging field of study that promotes a new perspective for perceiving cardiovascular risks. The term metaflammation denotes the entire cascade of immune responses activated by a new class of metabolites known as "danger-associated metabolites" (DAMs). It is being proposed by the present review for the first time. We summarize current studies covering bench to bedside aspects of DAMs to better understand CMDs in the context of DAMs. We have focused on the involvement of DAMs in the pathophysiological development of CMDs, including the disruption of immune homeostasis and chronic inflammation-triggered damage leading to CMD-related adverse events, as well as emerging therapeutic approaches for targeting DAM metabolism in CMDs.
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Affiliation(s)
- Anlu Wang
- Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing 100091, China; National Clinical Research Center for Chinese Medicine Cardiology, Beijing 100091, China
| | - Baoyi Guan
- Department of Internal Medicine-Cardiovascular, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510000, China
| | - He Zhang
- Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing 100091, China; National Clinical Research Center for Chinese Medicine Cardiology, Beijing 100091, China
| | - Hao Xu
- Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing 100091, China; National Clinical Research Center for Chinese Medicine Cardiology, Beijing 100091, China.
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Liu T, Sun Z, Yang Z, Qiao X. Microbiota-derived short-chain fatty acids and modulation of host-derived peptides formation: Focused on host defense peptides. Biomed Pharmacother 2023; 162:114586. [PMID: 36989711 DOI: 10.1016/j.biopha.2023.114586] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 03/12/2023] [Accepted: 03/21/2023] [Indexed: 03/29/2023] Open
Abstract
The byproducts of bacterial fermentation known as short-chain fatty acids (SCFAs) are chemically comprised of a carboxylic acid component and a short hydrocarbon chain. Recent investigations have demonstrated that SCFAs can affect intestinal immunity by inducing endogenous host defense peptides (HDPs) and their beneficial effects on barrier integrity, gut health, energy supply, and inflammation. HDPs, which include defensins, cathelicidins, and C-type lectins, perform a significant function in innate immunity in gastrointestinal mucosal membranes. SCFAs have been demonstrated to stimulate HDP synthesis by intestinal epithelial cells via interactions with G protein-coupled receptor 43 (GPR43), activation of the Jun N-terminal kinase (JNK) and Mitogen-activated protein kinase kinase (MEK)/extracellular signal-regulated kinase (ERK) pathways, and the cell growth pathways. Furthermore, SCFA butyrate has been demonstrated to enhance the number of HDPs released from macrophages. SCFAs promote monocyte-to-macrophage development and stimulate HDP synthesis in macrophages by inhibiting histone deacetylase (HDAC). Understanding the etiology of many common disorders might be facilitated by studies into the function of microbial metabolites, such as SCFAs, in the molecular regulatory processes of immune responses (e.g., HDP production). This review will focus on the current knowledge of the role and mechanism of microbiota-derived SCFAs in influencing the synthesis of host-derived peptides, particularly HDPs.
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Tobin I, Zhang G. Regulation of Host Defense Peptide Synthesis by Polyphenols. Antibiotics (Basel) 2023; 12:660. [PMID: 37107022 PMCID: PMC10135163 DOI: 10.3390/antibiotics12040660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 03/24/2023] [Accepted: 03/26/2023] [Indexed: 03/30/2023] Open
Abstract
The rise of antimicrobial resistance has created an urgent need for antibiotic-alternative strategies for disease control and prevention. Host defense peptides (HDPs), which have both antimicrobial and immunomodulatory properties, are an important component of the innate immune system. A host-directed approach to stimulate the synthesis of endogenous HDPs has emerged as a promising solution to treat infections with a minimum risk for developing antimicrobial resistance. Among a diverse group of compounds that have been identified as inducers of HDP synthesis are polyphenols, which are naturally occurring secondary metabolites of plants characterized by the presence of multiple phenol units. In addition to their well-known antioxidant and anti-inflammatory activities, a variety of polyphenols have been shown to stimulate HDP synthesis across animal species. This review summarizes both the in vitro and in vivo evidence of polyphenols regulating HDP synthesis. The mechanisms by which polyphenols induce HDP gene expression are also discussed. Natural polyphenols warrant further investigation as potential antibiotic alternatives for the control and prevention of infectious diseases.
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Affiliation(s)
| | - Guolong Zhang
- Department of Animal and Food Sciences, Oklahoma State University, Stillwater, OK 74078, USA;
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Barrier ML, Myszor IT, Sahariah P, Sigurdsson S, Carmena-Bargueño M, Pérez-Sánchez H, Gudmundsson GH. Aroylated phenylenediamine HO53 modulates innate immunity, histone acetylation and metabolism. Mol Immunol 2023; 155:153-164. [PMID: 36812763 DOI: 10.1016/j.molimm.2023.02.003] [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: 07/08/2022] [Revised: 11/18/2022] [Accepted: 02/07/2023] [Indexed: 02/22/2023]
Abstract
In the current context of antibiotic resistance, the need to find alternative treatment strategies is urgent. Our research aimed to use synthetized aroylated phenylenediamines (APDs) to induce the expression of cathelicidin antimicrobial peptide gene (CAMP) to minimize the necessity of antibiotic use during infection. One of these compounds, HO53, showed promising results in inducing CAMP expression in bronchial epithelium cells (BCi-NS1.1 hereafter BCi). Thus, to decipher the cellular effects of HO53 on BCi cells, we performed RNA sequencing (RNAseq) analysis after 4, 8 and 24 h treatment of HO53. The number of differentially expressed transcripts pointed out an epigenetic modulation. Yet, the chemical structure and in silico modeling indicated HO53 as a histone deacetylase (HDAC) inhibitor. When exposed to a histone acetyl transferase (HAT) inhibitor, BCi cells showed a decreased expression of CAMP. Inversely, when treated with a specific HDAC3 inhibitor (RGFP996), BCi cells showed an increased expression of CAMP, indicating acetylation status in cells as determinant for the induction of the expression of the gene CAMP expression. Interestingly, a combination treatment with both HO53 and HDAC3 inhibitor RGFP966 leads to a further increase of CAMP expression. Moreover, HDAC3 inhibition by RGFP966 leads to increased expression of STAT3 and HIF1A, both previously demonstrated to be involved in pathways regulating CAMP expression. Importantly, HIF1α is considered as a master regulator in metabolism. A significant number of genes of metabolic enzymes were detected in our RNAseq data with enhanced expression conveying a shift toward enhanced glycolysis. Overall, we are demonstrating that HO53 might have a translational value against infections in the future through a mechanism leading to innate immunity strengthening involving HDAC inhibition and shifting the cells towards an immunometabolism, which further favors innate immunity activation.
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Affiliation(s)
- Marjorie Laurence Barrier
- Department of Life and Environmental Sciences, Biomedical Center, University of Iceland, Reykjavik, Iceland
| | - Iwona Teresa Myszor
- Department of Life and Environmental Sciences, Biomedical Center, University of Iceland, Reykjavik, Iceland
| | - Priyanka Sahariah
- Department of Life and Environmental Sciences, Biomedical Center, University of Iceland, Reykjavik, Iceland
| | - Snaevar Sigurdsson
- Department of Life and Environmental Sciences, Biomedical Center, University of Iceland, Reykjavik, Iceland
| | - Miguel Carmena-Bargueño
- Structural Bioinformatics and High Performance Computing Research Group (BIO-HPC), UCAM Universidad Católica de Murcia, Guadalupe, Spain
| | - Horacio Pérez-Sánchez
- Structural Bioinformatics and High Performance Computing Research Group (BIO-HPC), UCAM Universidad Católica de Murcia, Guadalupe, Spain
| | - Gudmundur Hrafn Gudmundsson
- Department of Life and Environmental Sciences, Biomedical Center, University of Iceland, Reykjavik, Iceland.
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Morio KA, Sternowski RH, Brogden KA. Induction of Endogenous Antimicrobial Peptides to Prevent or Treat Oral Infection and Inflammation. Antibiotics (Basel) 2023; 12:antibiotics12020361. [PMID: 36830272 PMCID: PMC9952314 DOI: 10.3390/antibiotics12020361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 02/03/2023] [Accepted: 02/05/2023] [Indexed: 02/11/2023] Open
Abstract
Antibiotics are often used to treat oral infections. Unfortunately, excessive antibiotic use can adversely alter oral microbiomes and promote the development of antibiotic-resistant microorganisms, which can be difficult to treat. An alternate approach could be to induce the local transcription and expression of endogenous oral antimicrobial peptides (AMPs). To assess the feasibility and benefits of this approach, we conducted literature searches to identify (i) the AMPs expressed in the oral cavity; (ii) the methods used to induce endogenous AMP expression; and (iii) the roles that expressed AMPs may have in regulating oral inflammation, immunity, healing, and pain. Search results identified human neutrophil peptides (HNP), human beta defensins (HBD), and cathelicidin AMP (CAMP) gene product LL-37 as prominent AMPs expressed by oral cells and tissues. HNP, HBD, and LL-37 expression can be induced by micronutrients (trace elements, elements, and vitamins), nutrients, macronutrients (mono-, di-, and polysaccharides, amino acids, pyropeptides, proteins, and fatty acids), proinflammatory agonists, thyroid hormones, and exposure to ultraviolet (UV) irradiation, red light, or near infrared radiation (NIR). Localized AMP expression can help reduce infection, inflammation, and pain and help oral tissues heal. The use of a specific inducer depends upon the overall objective. Inducing the expression of AMPs through beneficial foods would be suitable for long-term health protection. Additionally, the specialized metabolites or concentrated extracts that are utilized as dosage forms would maintain the oral and intestinal microbiome composition and control oral and intestinal infections. Inducing AMP expression using irradiation methodologies would be applicable to a specific oral treatment area in addition to controlling local infections while regulating inflammatory and healing processes.
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Affiliation(s)
| | | | - Kim A. Brogden
- College of Dentistry, The University of Iowa, Iowa City, IA 52242, USA
- Correspondence:
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Baindara P, Ganguli S, Chakraborty R, Mandal SM. Preventing Respiratory Viral Diseases with Antimicrobial Peptide Master Regulators in the Lung Airway Habitat. Clin Pract 2023; 13:125-147. [PMID: 36648852 PMCID: PMC9844411 DOI: 10.3390/clinpract13010012] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 12/22/2022] [Accepted: 12/28/2022] [Indexed: 01/18/2023] Open
Abstract
The vast surface area of the respiratory system acts as an initial site of contact for microbes and foreign particles. The whole respiratory epithelium is covered with a thin layer of the airway and alveolar secretions. Respiratory secretions contain host defense peptides (HDPs), such as defensins and cathelicidins, which are the best-studied antimicrobial components expressed in the respiratory tract. HDPs have an important role in the human body's initial line of defense against pathogenic microbes. Epithelial and immunological cells produce HDPs in the surface fluids of the lungs, which act as endogenous antibiotics in the respiratory tract. The production and action of these antimicrobial peptides (AMPs) are critical in the host's defense against respiratory infections. In this study, we have described all the HDPs secreted in the respiratory tract as well as how their expression is regulated during respiratory disorders. We focused on the transcriptional expression and regulation mechanisms of respiratory tract HDPs. Understanding how HDPs are controlled throughout infections might provide an alternative to relying on the host's innate immunity to combat respiratory viral infections.
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Affiliation(s)
- Piyush Baindara
- Department of Radiation Oncology, University of Missouri, Columbia, MO 65211, USA
| | - Sriradha Ganguli
- OMICS Laboratory, Department of Biotechnology, University of North Bengal, P.O. NBU, Siliguri 734013, West Bengal, India
| | - Ranadhir Chakraborty
- OMICS Laboratory, Department of Biotechnology, University of North Bengal, P.O. NBU, Siliguri 734013, West Bengal, India
| | - Santi M. Mandal
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
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Hu Q, Yin F, Yang L, Li B, Lei G, Wang C, Yin Y, Liu D. Dietary tributyrin intervention improves the carcass traits, organ indices, and blood biomarker profiles in broilers under the isocaloric diets administration. Poult Sci 2022; 101:102061. [PMID: 36055018 PMCID: PMC9449853 DOI: 10.1016/j.psj.2022.102061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 06/27/2022] [Accepted: 07/19/2022] [Indexed: 11/18/2022] Open
Abstract
The objective of the current study was to investigate the effect of dietary tributyrin (TB) intervention on carcass traits, visceral and immune organ indices, and blood biomarker profiles in Arbor Acres (AA) broilers under the isocaloric diets administration. A total of 432-day-old healthy AA broiler chickens were assigned to 4 treatments, with 12 replicates per treatment and 9 birds per cage, for 42 d. The dietary treatments were a basal diet (control) and the basal diet supplemented with a TB product (Eucalorie) at doses of 0.50 g/kg (TB1), 1.0 g/kg (TB2), and 2.0 g/kg (TB3). The results showed that dietary TB treatment quadratically improved the average daily gain and average daily feed intake in the second (22–42 d) and overall (0–42 d) feeding periods (P < 0.05) while decreasing the feed conversion ratio in the second feeding period (P < 0.05). Dietary TB treatment improved the carcass traits, as evidenced by a higher eviscerated carcass rate and lower abdominal fat yield than those in the control group (P < 0.05). The breast meat yield rate was quadratically improved in response to dietary TB administration (P < 0.05). Dietary TB treatment improved the kidney, spleen, thymus, and bursa indices (P < 0.05) and reduced the lung indices compared with those in the control group (P < 0.05). In particular, the spleen and thymus indices were improved quadratically in response to dietary TB administration (P < 0.05). Dietary TB treatment improved the white and red blood cell counts, platelet count, hemoglobin and hematocrit at d 21, and platelet count at d 42 (P < 0.05), with those in the TB3 group being most affected. Dietary TB administration quadratically decreased the plasma content of uric acid at both d 21 and d 42 as well as that of creatine kinase at d 42 (P < 0.05), while it quadratically increased the plasma albumin/globulin ratio at both d 21 and d 42 (P < 0.05). Collectively, these results demonstrated that dietary TB intervention improved the growth performance, carcass traits, selected visceral and immune organ indices, and some blood biochemical markers under the isocaloric diets administration, which may facilitate better economic profit returns in poultry industry application.
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Affiliation(s)
- Qunbing Hu
- College of Life Sciences, Hunan Normal University, Changsha 410125, China; State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China; Hubei Horwath Biotechnology Co., Ltd., Xianning 437000, China
| | - Fugui Yin
- Hubei Horwath Biotechnology Co., Ltd., Xianning 437000, China; Institute of Subtropical Agriculture, the Chinese Academy of Sciences, Changsha 410125, China
| | - Ling Yang
- Hubei Horwath Biotechnology Co., Ltd., Xianning 437000, China
| | - Baocheng Li
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China; Hubei Horwath Biotechnology Co., Ltd., Xianning 437000, China
| | - Gang Lei
- Hubei Horwath Biotechnology Co., Ltd., Xianning 437000, China
| | - Cong Wang
- Hubei Horwath Biotechnology Co., Ltd., Xianning 437000, China
| | - Yulong Yin
- College of Life Sciences, Hunan Normal University, Changsha 410125, China; Institute of Subtropical Agriculture, the Chinese Academy of Sciences, Changsha 410125, China
| | - Dan Liu
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China.
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Shannon AH, Adelman SA, Hisey EA, Potnis SS, Rozo V, Yung MW, Li JY, Murphy CJ, Thomasy SM, Leonard BC. Antimicrobial Peptide Expression at the Ocular Surface and Their Therapeutic Use in the Treatment of Microbial Keratitis. Front Microbiol 2022; 13:857735. [PMID: 35722307 PMCID: PMC9201425 DOI: 10.3389/fmicb.2022.857735] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Accepted: 05/12/2022] [Indexed: 11/29/2022] Open
Abstract
Microbial keratitis is a common cause of ocular pain and visual impairment worldwide. The ocular surface has a relatively paucicellular microbial community, mostly found in the conjunctiva, while the cornea would be considered relatively sterile. However, in patients with microbial keratitis, the cornea can be infected with multiple pathogens including Staphylococcus aureus, Pseudomonas aeruginosa, and Fusarium sp. Treatment with topical antimicrobials serves as the standard of care for microbial keratitis, however, due to high rates of pathogen resistance to current antimicrobial medications, alternative therapeutic strategies must be developed. Multiple studies have characterized the expression and activity of antimicrobial peptides (AMPs), endogenous peptides with key antimicrobial and wound healing properties, on the ocular surface. Recent studies and clinical trials provide promise for the use of AMPs as therapeutic agents. This article reviews the repertoire of AMPs expressed at the ocular surface, how expression of these AMPs can be modulated, and the potential for harnessing the AMPs as potential therapeutics for patients with microbial keratitis.
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Affiliation(s)
- Allison H. Shannon
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, Davis, CA, United States
| | - Sara A. Adelman
- William R. Pritchard Veterinary Medical Teaching Hospital, School of Veterinary Medicine, University of California, Davis, Davis, CA, United States
| | - Erin A. Hisey
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, Davis, CA, United States
| | - Sanskruti S. Potnis
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, Davis, CA, United States
| | - Vanessa Rozo
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, Davis, CA, United States
| | - Madeline W. Yung
- Department of Ophthalmology & Vision Science, School of Medicine, University of California, Davis, Davis, CA, United States
| | - Jennifer Y. Li
- Department of Ophthalmology & Vision Science, School of Medicine, University of California, Davis, Davis, CA, United States
| | - Christopher J. Murphy
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, Davis, CA, United States
- Department of Ophthalmology & Vision Science, School of Medicine, University of California, Davis, Davis, CA, United States
| | - Sara M. Thomasy
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, Davis, CA, United States
- Department of Ophthalmology & Vision Science, School of Medicine, University of California, Davis, Davis, CA, United States
| | - Brian C. Leonard
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, Davis, CA, United States
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Siednamohammeddeen N, Badi R, Mohammeddeen T, Enan K, AmalSaeed. The effect of gum Arabic supplementation on cathelicidin expression in monocyte derived macrophages in mice. BMC Complement Med Ther 2022; 22:149. [PMID: 35650596 PMCID: PMC9158159 DOI: 10.1186/s12906-022-03627-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 05/17/2022] [Indexed: 11/17/2022] Open
Abstract
Background Antimicrobial peptides (AMPs) are important effectors of the innate defense system. Cathelicidins, (CRAMP in mouse/rat, LL-37 in human) is one of the two major classes of AMPs in humans. The upregulation of LL-37 synthesis is a novel non-antibiotic approach to prevent or treat infectious diseases. Butyrate was found to induce Cathelicidin expression. Gum Arabic (GA), an exudate from Acacia senegaltree, is known for its prebiotic effects. Fermentation of GA by colonic bacteria increases serum butyrate concentrations. This study was conducted to investigate if GA supplementation can increase Cathelicidin expression in macrophages. Methods The study was an in-vivo experiment in mice. Thirty mice were randomly divided into three groups, ten mice per group. The two intervention groups received GA dissolved in drinking water in two different concentrations (15% w/v and 30% w/v) for 28 days. The third group served as a control. Blood was collected on Day 29 to isolate peripheral blood mononuclear cells (PBMC) which were cultured to obtain monocyte derived macrophages (MDMs). The transcription level of CRAMP was determined in MDMsby qPCR. Results We detected a significant increase (p = 0.023) in CRAMP expression in MDMs following 28 days of 15% GA supplementation, compared to the control group, but there was no significant change in the group on 30% GA supplementation (p = 0.055). Conclusion GAsupplementation can induce Cathelicidin expression in MDMs and the effect is dose dependent. Supplementary Information The online version contains supplementary material available at 10.1186/s12906-022-03627-9.
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Affiliation(s)
| | - Rehab Badi
- Physiology Department, College of Medicine, King Khalid University, Abha, Saudi Arabia.,Department of Physiology, Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Tahane Mohammeddeen
- Department of Microbiology, Faculty of Medicine, Red Sea University, Portsudan, Sudan
| | - Khalid Enan
- Department of Virology, Central Laboratory, Ministry of Higher Education and Scientific Reaserch, Khartoum, Sudan
| | - AmalSaeed
- Department of Physiology, Faculty of Medicine, University of Khartoum, Khartoum, Sudan
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12
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Beck LA, Cork MJ, Amagai M, De Benedetto A, Kabashima K, Hamilton JD, Rossi AB. Type 2 Inflammation Contributes to Skin Barrier Dysfunction in Atopic Dermatitis. JID INNOVATIONS 2022; 2:100131. [PMID: 36059592 PMCID: PMC9428921 DOI: 10.1016/j.xjidi.2022.100131] [Citation(s) in RCA: 74] [Impact Index Per Article: 37.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 01/04/2022] [Accepted: 01/06/2022] [Indexed: 01/02/2023] Open
Abstract
Skin barrier dysfunction, a defining feature of atopic dermatitis (AD), arises from multiple interacting systems. In AD, skin inflammation is caused by host-environment interactions involving keratinocytes as well as tissue-resident immune cells such as type 2 innate lymphoid cells, basophils, mast cells, and T helper type 2 cells, which produce type 2 cytokines, including IL-4, IL-5, IL-13, and IL-31. Type 2 inflammation broadly impacts the expression of genes relevant for barrier function, such as intracellular structural proteins, extracellular lipids, and junctional proteins, and enhances Staphylococcus aureus skin colonization. Systemic anti‒type 2 inflammation therapies may improve dysfunctional skin barrier in AD.
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Key Words
- AD, atopic dermatitis
- AMP, antimicrobial peptide
- CLDN, claudin
- FFA, free fatty acid
- ILC2, type 2 innate lymphoid cell
- Jaki, Jak inhibitor
- K, keratin
- KC, keratinocyte
- MMP, matrix metalloproteinase
- NMF, natural moisturizing factor
- PAR, protease-activated receptor
- PDE-4, phosphodiesterase-4
- SC, stratum corneum
- SG, stratum granulosum
- TCI, topical calcineurin inhibitor
- TCS, topical corticosteroid
- TEWL, transepidermal water loss
- TJ, tight junction
- TLR, toll-like receptor
- TNF-α, tumor necrosis factor alpha
- TYK, tyrosine kinase
- Th, T helper
- ZO, zona occludens
- hBD, human β-defensin
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Affiliation(s)
- Lisa A. Beck
- Department of Dermatology, University of Rochester Medical Center, Rochester, New York, USA,Correspondence: Lisa A. Beck, Department of Dermatology, University of Rochester Medical Center, 601 Elmwood Ave, Box 697, Rochester, New York 14642, USA.
| | - Michael J. Cork
- Sheffield Dermatology Research, Department of Infection, Immunity and Cardiovascular Disease (IICD), The University of Sheffield, The Medical School, Sheffield, United Kingdom
| | - Masayuki Amagai
- Department of Dermatology, Keio University School of Medicine, Tokyo, Japan,Laboratory for Skin Homeostasis, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Anna De Benedetto
- Department of Dermatology, University of Rochester Medical Center, Rochester, New York, USA
| | - Kenji Kabashima
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto University, Kyoto, Japan
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13
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Yang Q, Burkardt AC, Sunkara LT, Xiao K, Zhang G. Natural Cyclooxygenase-2 Inhibitors Synergize With Butyrate to Augment Chicken Host Defense Peptide Gene Expression. Front Immunol 2022; 13:819222. [PMID: 35273602 PMCID: PMC8902166 DOI: 10.3389/fimmu.2022.819222] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Accepted: 01/31/2022] [Indexed: 01/15/2023] Open
Abstract
Enhancing the synthesis of microbicidal and immunomodulatory host defense peptides (HDP) is a promising host-directed antimicrobial strategy to combat a growing threat of antimicrobial resistance. Here we investigated the effect of several natural cyclooxygenase-2 (COX-2) inhibitors on chicken HDP gene regulation. Our results indicated that phenolic COX-2 inhibitors such as quercetin, resveratrol, epigallocatechin gallate, anacardic acid, and garcinol enhanced HDP gene expression in chicken HTC macrophage cell line and peripheral blood mononuclear cells (PBMCs). Moreover, these natural COX-2 inhibitors showed a strong synergy with butyrate in augmenting the expressions of multiple HDP genes in HTC cells and PBMCs. Additionally, quercetin and butyrate synergistically promoted the expressions of mucin-2 and claudin-1, two major genes involved in barrier function, while suppressing lipopolysaccharide-triggered interleukin-1β expression in HTC macrophages. Mechanistically, we revealed that NF-κB, p38 mitogen-activated protein kinase, and cyclic adenosine monophosphate signaling pathways were all involved in the avian β-defensin 9 gene induction, but histone H4 was not hyperacetylated in response to a combination of butyrate and quercetin. Because of their HDP-inducing, barrier-protective, and antiinflammatory activities, these natural COX-2 inhibitors, when combined with butyrate, may be developed as novel host-directed antimicrobial therapeutics.
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Affiliation(s)
- Qing Yang
- Department of Animal and Food Sciences, Oklahoma State University, Stillwater, OK, United States
| | - Amanda C Burkardt
- Department of Animal and Food Sciences, Oklahoma State University, Stillwater, OK, United States
| | - Lakshimi T Sunkara
- Department of Animal and Food Sciences, Oklahoma State University, Stillwater, OK, United States.,Veterinary Diagnostic Center, Clemson University, Clemson, SC, United States
| | - Kan Xiao
- Department of Animal and Food Sciences, Oklahoma State University, Stillwater, OK, United States.,Hubei Key Laboratory of Animal Nutrition and Feed Science, Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan Polytechnic University, Wuhan, China
| | - Guolong Zhang
- Department of Animal and Food Sciences, Oklahoma State University, Stillwater, OK, United States
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14
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Kotlyarov S. Involvement of the Innate Immune System in the Pathogenesis of Chronic Obstructive Pulmonary Disease. Int J Mol Sci 2022; 23:985. [PMID: 35055174 PMCID: PMC8778852 DOI: 10.3390/ijms23020985] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 01/14/2022] [Accepted: 01/15/2022] [Indexed: 01/27/2023] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is a common, socially significant disease characterized by progressive airflow limitation due to chronic inflammation in the bronchi. Although the causes of COPD are considered to be known, the pathogenesis of the disease continues to be a relevant topic of study. Mechanisms of the innate immune system are involved in various links in the pathogenesis of COPD, leading to persistence of chronic inflammation in the bronchi, their bacterial colonization and disruption of lung structure and function. Bronchial epithelial cells, neutrophils, macrophages and other cells are involved in the development and progression of the disease, demonstrating multiple compromised immune mechanisms.
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Affiliation(s)
- Stanislav Kotlyarov
- Department of Nursing, Ryazan State Medical University, 390026 Ryazan, Russia
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15
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Abstract
The gut microbiome produces chemically diverse small molecules to interact with the host, conveying signals from the gut to the whole system. The microbial metabolites feature several unique modes of interaction with host targets, which fits well into the balanced and networked fashion of biological regulation. Hence, fully unveiling the targetome of signaling microbial metabolites may offer new insights into host health and disease, expand the repertoire of druggable targets, and enlighten a bioinspired path to drug design and discovery. In this review, we present an updated understanding of how microbial metabolite interaction with host targets finely orchestrates and integrates multiple signals to pathophysiological phenotypes, contributing new insights into organ crosstalk and holistic homeostasis maintenance in biological systems. We discuss strategies and open questions for mining and biomimicking the microbial metabolite-targetome interactions for pharmacological manipulation, which may lead to a new paradigm of drug discovery.
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Affiliation(s)
- Xiao Zheng
- State Key Laboratory of Natural Medicines, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Xiaoying Cai
- State Key Laboratory of Natural Medicines, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Haiping Hao
- State Key Laboratory of Natural Medicines, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China.
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16
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Yang Q, Fong LA, Lyu W, Sunkara LT, Xiao K, Zhang G. Synergistic Induction of Chicken Antimicrobial Host Defense Peptide Gene Expression by Butyrate and Sugars. Front Microbiol 2021; 12:781649. [PMID: 34956146 PMCID: PMC8696121 DOI: 10.3389/fmicb.2021.781649] [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: 09/23/2021] [Accepted: 11/12/2021] [Indexed: 11/13/2022] Open
Abstract
Antimicrobial resistance is a major concern to public health demanding effective alternative strategies to disease control and prevention. Modulation of endogenous host defense peptide (HDP) synthesis has emerged as a promising antibiotic alternative approach. This study investigated a potential synergy between sugars and butyrate in inducing HDP gene expression in chickens. Our results revealed that sugars differentially regulated HDP expression in both gene- and sugar-specific manners in chicken HD11 macrophage cells. Among eight mono- and disaccharides tested, all were potent inducers of avian β-defensin 9 (AvBD9) gene (p<0.05), but only galactose, trehalose, and lactose obviously upregulated cathelicidin-B1 (CATHB1) gene expression. The expression of AvBD14 gene, on the other hand, was minimally influenced by sugars. Moreover, all sugars exhibited a strong synergy with butyrate in enhancing AvBD9 expression, while only galactose, trehalose, and lactose were synergistic with butyrate in CATHB1 induction. No synergy in AvBD14 induction was observed between sugars and butyrate. Although lactose augmented the expression of nearly all HDP genes, its synergy with butyrate was only seen with several, but not all, HDP genes. Mucin-2 gene was also synergistically induced by a combination of lactose and butyrate. Furthermore, lactose synergized with butyrate to induce AvBD9 expression in chicken jejunal explants (p<0.05). Mechanistically, hyper-acetylation of histones was observed in response to both butyrate and lactose, relative to individual compounds. Mitogen-activated protein kinase, NF-κB, and cyclic adenosine monophosphate signaling pathways were also found to be involved in butyrate- and lactose-mediated synergy in AvBD9 induction. Collectively, a combination of butyrate and a sugar with both HDP-inducing and barrier protective activities holds the promise to be developed as an alternative to antibiotics for disease control and prevention.
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Affiliation(s)
- Qing Yang
- Department of Animal and Food Sciences, Oklahoma State University, Stillwater, OK, United States
| | - Li-An Fong
- Department of Animal and Food Sciences, Oklahoma State University, Stillwater, OK, United States
| | - Wentao Lyu
- Department of Animal and Food Sciences, Oklahoma State University, Stillwater, OK, United States.,State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Agro-Product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Lakshmi T Sunkara
- Department of Animal and Food Sciences, Oklahoma State University, Stillwater, OK, United States.,Veterinary Diagnostic Center, Clemson University, Clemson, SC, United States
| | - Kan Xiao
- Department of Animal and Food Sciences, Oklahoma State University, Stillwater, OK, United States.,Hubei Key Laboratory of Animal Nutrition and Feed Science, Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan Polytechnic University, Wuhan, China
| | - Guolong Zhang
- Department of Animal and Food Sciences, Oklahoma State University, Stillwater, OK, United States
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17
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Javanshir N, Hosseini GNG, Sadeghi M, Esmaeili R, Satarikia F, Ahmadian G, Allahyari N. Evaluation of the Function of Probiotics, Emphasizing the Role of their Binding to the Intestinal Epithelium in the Stability and their Effects on the Immune System. Biol Proced Online 2021; 23:23. [PMID: 34847891 PMCID: PMC8903605 DOI: 10.1186/s12575-021-00160-w] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 11/04/2021] [Indexed: 12/11/2022] Open
Abstract
Due to the importance of using cost-effective methods for therapeutic purposes, the function of probiotics as safe microorganisms and the study of their relevant functional mechanisms have recently been in the spotlight. Finding the mechanisms of attachment and stability and their beneficial effects on the immune system can be useful in identifying and increasing the therapeutic effects of probiotics. In this review, the functional mechanisms of probiotics were comprehensively investigated. Relevant articles were searched in scientific sources, documents, and databases, including PubMed, NCBI, Bactibace, OptiBac, and Bagel4. The most important functional mechanisms of probiotics and their effects on strengthening the epithelial barrier, competitive inhibition of pathogenic microorganisms, production of antimicrobials, binding and interaction with the host, and regulatory effects on the immune system were discussed. In this regard, the attachment of probiotics to the epithelium is very important because the prerequisite for their proper functioning is to establish a proper connection to the epithelium. Therefore, more attention should be paid to the binding effect of probiotics, including sortase A, a significant factor involved in the expression of sortase-dependent proteins (SDP), on their surface as mediators of intestinal epithelial cell binding. In general, by investigating the functional mechanisms of probiotics, it was concluded that the mechanism by which probiotics regulate the immune system and adhesion capacity can directly and indirectly have preventive and therapeutic effects on a wide range of diseases. However, further study of these mechanisms requires extensive research on various aspects.
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Affiliation(s)
- Nahid Javanshir
- Department of Industrial and Environmental Biotechnology, National Institute of Genetic Engineering and Biotechnology. (NIGEB), P.O. Box: 14155-6343, Tehran, Iran
| | | | - Mahdieh Sadeghi
- Department of Science, Islamic Azad University - Parand Branch, Parand, Iran
| | | | - Fateme Satarikia
- Department of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Gholamreza Ahmadian
- Department of Industrial and Environmental Biotechnology, National Institute of Genetic Engineering and Biotechnology. (NIGEB), P.O. Box: 14155-6343, Tehran, Iran.
| | - Najaf Allahyari
- Department of Industrial and Environmental Biotechnology, National Institute of Genetic Engineering and Biotechnology. (NIGEB), P.O. Box: 14155-6343, Tehran, Iran.
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18
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Robinson K, Yang Q, Li H, Zhang L, Aylward B, Arsenault RJ, Zhang G. Butyrate and Forskolin Augment Host Defense, Barrier Function, and Disease Resistance Without Eliciting Inflammation. Front Nutr 2021; 8:778424. [PMID: 34778349 PMCID: PMC8579826 DOI: 10.3389/fnut.2021.778424] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 10/04/2021] [Indexed: 12/13/2022] Open
Abstract
Host defense peptides (HDPs) are an integral part of the innate immune system with both antimicrobial and immunomodulatory activities. Induction of endogenous HDP synthesis is being actively explored as an antibiotic-alternative approach to disease control and prevention. Butyrate, a short-chain fatty acid, and forskolin, a phytochemical, have been shown separately to induce HDP gene expression in human cells. Here, we investigated the ability of butyrate and forskolin to induce the expressions of chicken HDP genes and the genes involved in barrier function such as mucin 2 and claudin 1 both in vitro and in vivo. We further evaluated their efficacy in protecting chickens from Clostridium perfringens-induced necrotic enteritis. Additionally, we profiled the transcriptome and global phosphorylation of chicken HD11 macrophage cells in response to butyrate and forskolin using RNA sequencing and a kinome peptide array, respectively. Our results showed a strong synergy between butyrate and forskolin in inducing the expressions of several, but not all, HDP genes. Importantly, dietary supplementation of butyrate and a forskolin-containing plant extract resulted in significant alleviation of intestinal lesions and the C. perfringens colonization in a synergistic manner in a chicken model of necrotic enteritis. RNA sequencing revealed a preferential increase in HDP and barrier function genes with no induction of proinflammatory cytokines in response to butyrate and forskolin. The antiinflammatory and barrier protective properties of butyrate and forskolin were further confirmed by the kinome peptide array. Moreover, we demonstrated an involvement of inducible cAMP early repressor (ICER)-mediated negative feedback in HDP induction by butyrate and forskolin. Overall, these results highlight a potential for developing butyrate and forskolin, two natural products, as novel antibiotic alternatives to enhance intestinal health and disease resistance in poultry and other animals.
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Affiliation(s)
- Kelsy Robinson
- Department of Animal and Food Sciences, Oklahoma State University, Stillwater, OK, United States.,Poultry Production and Product Safety Research Unit, United States Department of Agriculture (USDA)-Agricultural Research Service, Fayetteville, AR, United States
| | - Qing Yang
- Department of Animal and Food Sciences, Oklahoma State University, Stillwater, OK, United States
| | - Hong Li
- Department of Animal and Food Sciences, Oklahoma State University, Stillwater, OK, United States.,College of Animal Science and Technology, Henan Agriculture University, Zhengzhou, China
| | - Long Zhang
- Department of Animal and Food Sciences, Oklahoma State University, Stillwater, OK, United States.,Institute of Ecology, China West Normal University, Nanchong, China
| | - Bridget Aylward
- Department of Animal and Food Sciences, University of Delaware, Newark, DE, United States
| | - Ryan J Arsenault
- Department of Animal and Food Sciences, University of Delaware, Newark, DE, United States
| | - Guolong Zhang
- Department of Animal and Food Sciences, Oklahoma State University, Stillwater, OK, United States
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19
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Yang Q, Whitmore MA, Robinson K, Lyu W, Zhang G. Butyrate, Forskolin, and Lactose Synergistically Enhance Disease Resistance by Inducing the Expression of the Genes Involved in Innate Host Defense and Barrier Function. Antibiotics (Basel) 2021; 10:antibiotics10101175. [PMID: 34680756 PMCID: PMC8532606 DOI: 10.3390/antibiotics10101175] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 09/15/2021] [Accepted: 09/20/2021] [Indexed: 01/28/2023] Open
Abstract
The rising concern of antimicrobial resistance highlights a need for effective alternatives to antibiotics for livestock production. Butyrate, forskolin, and lactose are three natural products known to induce the synthesis of host defense peptides (HDP), which are a critical component of innate immunity. In this study, the synergy among butyrate, forskolin, and lactose in enhancing innate host defense, barrier function, and resistance to necrotic enteritis and coccidiosis was investigated. Our results indicated that the three compounds synergistically augmented the expressions of multiple HDP and barrier function genes in chicken HD11 macrophages. The compounds also showed an obvious synergy in promoting HDP gene expressions in chicken jejunal explants. Dietary supplementation of a combination of 1 g/kg sodium butyrate, 10 mg/kg forskolin-containing plant extract, and 10 g/kg lactose dramatically improved the survival of chickens from 39% to 94% (p < 0.001) in a co-infection model of necrotic enteritis. Furthermore, the three compounds largely reversed growth suppression, significantly alleviated intestinal lesions, and reduced colonization of Clostridium perfringens or Eimeria maxima in chickens with necrotic enteritis and coccidiosis (p < 0.01). Collectively, dietary supplementation of butyrate, forskolin, and lactose is a promising antibiotic alternative approach to disease control and prevention for poultry and possibly other livestock species.
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Affiliation(s)
- Qing Yang
- Department of Animal and Food Sciences, Oklahoma State University, Stillwater, OK 74078, USA; (Q.Y.); (M.A.W.); (K.R.); (W.L.)
| | - Melanie A. Whitmore
- Department of Animal and Food Sciences, Oklahoma State University, Stillwater, OK 74078, USA; (Q.Y.); (M.A.W.); (K.R.); (W.L.)
| | - Kelsy Robinson
- Department of Animal and Food Sciences, Oklahoma State University, Stillwater, OK 74078, USA; (Q.Y.); (M.A.W.); (K.R.); (W.L.)
- Poultry Production and Product Safety Research Unit, USDA–Agricultural Research Service, Fayetteville, AR 72701, USA
| | - Wentao Lyu
- Department of Animal and Food Sciences, Oklahoma State University, Stillwater, OK 74078, USA; (Q.Y.); (M.A.W.); (K.R.); (W.L.)
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Agro-Product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Guolong Zhang
- Department of Animal and Food Sciences, Oklahoma State University, Stillwater, OK 74078, USA; (Q.Y.); (M.A.W.); (K.R.); (W.L.)
- Correspondence: ; Tel.: +1-405-744-8867
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20
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Hu Q, Yin F, Li B, Guo Y, Yin Y. Dietary Tributyrin Administration Improves Intestinal Morphology and Selected Bacterial and Short-Chain Fatty Acid Profiles in Broilers Under an Isocaloric Feeding Regime. Front Microbiol 2021; 12:715712. [PMID: 34421875 PMCID: PMC8371336 DOI: 10.3389/fmicb.2021.715712] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 07/12/2021] [Indexed: 12/17/2022] Open
Abstract
The current study was conducted to investigate the effect of dietary tributyrin (TB) administration on the intestinal and growth performances in Arbor Acres (AA) broilers under an isocaloric feeding regime. A total of 540 day-old healthy AA broilers were randomly assigned to five treatments with 12 replicates (pens) per treatment and nine birds per pen for 42 days. The dietary treatments were basal diet (control) and basal diet with TB at doses of 0.23 g/kg (TB1), 0.46 g/kg (TB2), 0.92 g/kg (TB3), and 1.84 g/kg (TB4). Particularly, to achieve the isocaloric and cost-saving experimental diets, soybean oil was replaced by the TB product (Eucalorie®) with equivalent metabolic energy contents, and the formulas were rebalanced with zeolite to get the sum of all the feed ingredients to 100%. On days 21 and 42, after weighing, the birds (one bird per replicate) whose body weight was close to the replicate average were euthanized to investigate the effect of dietary TB on intestinal morphology, intestinal bacterial population, and short-chain fatty acid contents. The results revealed that dietary TB administration increased the average daily gain, gain/feed ratio, and European broiler index (P < 0.05) and improved the intestinal morphology (P < 0.05) as indicated by higher villus height and the ratios of villus height/crypt depth in broilers. The incremental levels of TB increased the ileal Lactobacillus content (P = 0.05) and cecal Bacillus content (P = 0.02), respectively. Moreover, dietary TB administration also increased the contents of most of the selected short-chain fatty acids in ileal and cecal digesta (P < 0.05). Collectively, dietary TB administration quadratically improved the growth performance, intestinal morphology, beneficial bacterial population, and short-chain fatty acid levels under the isocaloric feeding regime, indicating better profit return potential in practical poultry operation.
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Affiliation(s)
- Qunbing Hu
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China.,Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China.,Hubei Horwath Biotechnology Co., Ltd., Xianning, China
| | - Fugui Yin
- Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China.,Hubei Horwath Biotechnology Co., Ltd., Xianning, China
| | - Baocheng Li
- Hubei Horwath Biotechnology Co., Ltd., Xianning, China
| | - Yuming Guo
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Yulong Yin
- Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China
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21
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Jia M, Zhang Y, Gao Y, Ma X. Effects of Medium Chain Fatty Acids on Intestinal Health of Monogastric Animals. Curr Protein Pept Sci 2021; 21:777-784. [PMID: 31889482 DOI: 10.2174/1389203721666191231145901] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 07/25/2019] [Accepted: 10/08/2019] [Indexed: 11/22/2022]
Abstract
Medium-chain fatty acids (MCFAs) are the main form of Medium Chain Triglycerides (MCTs) utilized by monogastric animals. MCFAs can be directly absorbed and supply rapid energy to promote the renewal and repair of intestinal epithelial cells, maintain the integrity of intestinal mucosal barrier function, and reduce inflammation and stress. In our review, we pay more attention to the role of MCFAs on intestinal microbiota and mucosa immunity to explore MCFA's positive effect. It was found that MCFAs and their esterified forms can decrease pathogens while increasing probiotics. In addition, being recognized via specific receptors, MCFAs are capable of alleviating inflammation to a certain extent by regulating inflammation and immune-related pathways. MCFAs may also have a certain value to relieve intestinal allergy and inflammatory bowel disease (IBD). Unknown mechanism of various MCFA characteristics still causes dilemmas in the application, thus MCFAs are used generally in limited dosages and combined with short-chain organic acids (SOAs) to attain ideal results. We hope that further studies will provide guidance for the practical use of MCFAs in animal feed.
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Affiliation(s)
- Manyi Jia
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University,
No. 2 Yuanmingyuan West Road, Beijing 100193, China
| | - Yucheng Zhang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University,
No. 2 Yuanmingyuan West Road, Beijing 100193, China
| | - Yuqi Gao
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University,
No. 2 Yuanmingyuan West Road, Beijing 100193, China
| | - Xi Ma
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University,
No. 2 Yuanmingyuan West Road, Beijing 100193, China
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22
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Dvorak Z, Klapholz M, Burris TP, Willing BP, Gioiello A, Pellicciari R, Galli F, March J, O'Keefe SJ, Sartor RB, Kim CH, Levy M, Mani S. Weak Microbial Metabolites: a Treasure Trove for Using Biomimicry to Discover and Optimize Drugs. Mol Pharmacol 2020; 98:343-349. [PMID: 32764096 PMCID: PMC7485585 DOI: 10.1124/molpharm.120.000035] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 07/22/2020] [Indexed: 12/12/2022] Open
Abstract
For decades, traditional drug discovery has used natural product and synthetic chemistry approaches to generate libraries of compounds, with some ending as promising drug candidates. A complementary approach has been to adopt the concept of biomimicry of natural products and metabolites so as to improve multiple drug-like features of the parent molecule. In this effort, promiscuous and weak interactions between ligands and receptors are often ignored in a drug discovery process. In this Emerging Concepts article, we highlight microbial metabolite mimicry, whereby parent metabolites have weak interactions with their receptors that then have led to discrete examples of more potent and effective drug-like molecules. We show specific examples of parent-metabolite mimics with potent effects in vitro and in vivo. Furthermore, we show examples of emerging microbial ligand-receptor interactions and provide a context in which these ligands could be improved as potential drugs. A balanced conceptual advance is provided in which we also acknowledge potential pitfalls-hyperstimulation of finely balanced receptor-ligand interactions could also be detrimental. However, with balance, we provide examples of where this emerging concept needs to be tested. SIGNIFICANCE STATEMENT: Microbial metabolite mimicry is a novel way to expand on the chemical repertoire of future drugs. The emerging concept is now explained using specific examples of the discovery of therapeutic leads from microbial metabolites.
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Affiliation(s)
- Zdenek Dvorak
- Department of Cell Biology and Genetics, Palacký University, Olomouc, Czech Republic (Z.D.); Department of Microbiology, University of Pennsylvania, Philadelphia, Pennsylvania (M.K., M.L.); The Center for Clinical Pharmacology, Washington University in St. Louis and St. Louis College of Pharmacy, St. Louis, Missouri (T.P.B.); Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta (B.P.W.); Department of Pharmaceutical Sciences, University of Perugia, Perugia, Italy (A.G., F.G.); TES Pharma, Corso Vannucci, Perugia, Italy (R.P.); The Department of Biological and Environmental Engineering, Cornell University, Ithaca, New York (J.M.); Division of Gastroenterology and Nutrition, UPMC Presbyterian Hospital, Pittsburgh, Pennsylvania (S.J.O.); Division of Gastroenterology and Hepatology, Department of Medicine, Center for Gastrointestinal Biology and Disease, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (R.B.S.); Department of Pathology, Mary H. Weiser Food Allergy Center, and Rogel Cancer Center, University of Michigan School of Medicine, Ann Arbor, Michigan (C.H.K.); and Department of Medicine, Albert Einstein College of Medicine, Bronx, New York (S.M.)
| | - Max Klapholz
- Department of Cell Biology and Genetics, Palacký University, Olomouc, Czech Republic (Z.D.); Department of Microbiology, University of Pennsylvania, Philadelphia, Pennsylvania (M.K., M.L.); The Center for Clinical Pharmacology, Washington University in St. Louis and St. Louis College of Pharmacy, St. Louis, Missouri (T.P.B.); Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta (B.P.W.); Department of Pharmaceutical Sciences, University of Perugia, Perugia, Italy (A.G., F.G.); TES Pharma, Corso Vannucci, Perugia, Italy (R.P.); The Department of Biological and Environmental Engineering, Cornell University, Ithaca, New York (J.M.); Division of Gastroenterology and Nutrition, UPMC Presbyterian Hospital, Pittsburgh, Pennsylvania (S.J.O.); Division of Gastroenterology and Hepatology, Department of Medicine, Center for Gastrointestinal Biology and Disease, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (R.B.S.); Department of Pathology, Mary H. Weiser Food Allergy Center, and Rogel Cancer Center, University of Michigan School of Medicine, Ann Arbor, Michigan (C.H.K.); and Department of Medicine, Albert Einstein College of Medicine, Bronx, New York (S.M.)
| | - Thomas P Burris
- Department of Cell Biology and Genetics, Palacký University, Olomouc, Czech Republic (Z.D.); Department of Microbiology, University of Pennsylvania, Philadelphia, Pennsylvania (M.K., M.L.); The Center for Clinical Pharmacology, Washington University in St. Louis and St. Louis College of Pharmacy, St. Louis, Missouri (T.P.B.); Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta (B.P.W.); Department of Pharmaceutical Sciences, University of Perugia, Perugia, Italy (A.G., F.G.); TES Pharma, Corso Vannucci, Perugia, Italy (R.P.); The Department of Biological and Environmental Engineering, Cornell University, Ithaca, New York (J.M.); Division of Gastroenterology and Nutrition, UPMC Presbyterian Hospital, Pittsburgh, Pennsylvania (S.J.O.); Division of Gastroenterology and Hepatology, Department of Medicine, Center for Gastrointestinal Biology and Disease, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (R.B.S.); Department of Pathology, Mary H. Weiser Food Allergy Center, and Rogel Cancer Center, University of Michigan School of Medicine, Ann Arbor, Michigan (C.H.K.); and Department of Medicine, Albert Einstein College of Medicine, Bronx, New York (S.M.)
| | - Benjamin P Willing
- Department of Cell Biology and Genetics, Palacký University, Olomouc, Czech Republic (Z.D.); Department of Microbiology, University of Pennsylvania, Philadelphia, Pennsylvania (M.K., M.L.); The Center for Clinical Pharmacology, Washington University in St. Louis and St. Louis College of Pharmacy, St. Louis, Missouri (T.P.B.); Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta (B.P.W.); Department of Pharmaceutical Sciences, University of Perugia, Perugia, Italy (A.G., F.G.); TES Pharma, Corso Vannucci, Perugia, Italy (R.P.); The Department of Biological and Environmental Engineering, Cornell University, Ithaca, New York (J.M.); Division of Gastroenterology and Nutrition, UPMC Presbyterian Hospital, Pittsburgh, Pennsylvania (S.J.O.); Division of Gastroenterology and Hepatology, Department of Medicine, Center for Gastrointestinal Biology and Disease, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (R.B.S.); Department of Pathology, Mary H. Weiser Food Allergy Center, and Rogel Cancer Center, University of Michigan School of Medicine, Ann Arbor, Michigan (C.H.K.); and Department of Medicine, Albert Einstein College of Medicine, Bronx, New York (S.M.)
| | - Antimo Gioiello
- Department of Cell Biology and Genetics, Palacký University, Olomouc, Czech Republic (Z.D.); Department of Microbiology, University of Pennsylvania, Philadelphia, Pennsylvania (M.K., M.L.); The Center for Clinical Pharmacology, Washington University in St. Louis and St. Louis College of Pharmacy, St. Louis, Missouri (T.P.B.); Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta (B.P.W.); Department of Pharmaceutical Sciences, University of Perugia, Perugia, Italy (A.G., F.G.); TES Pharma, Corso Vannucci, Perugia, Italy (R.P.); The Department of Biological and Environmental Engineering, Cornell University, Ithaca, New York (J.M.); Division of Gastroenterology and Nutrition, UPMC Presbyterian Hospital, Pittsburgh, Pennsylvania (S.J.O.); Division of Gastroenterology and Hepatology, Department of Medicine, Center for Gastrointestinal Biology and Disease, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (R.B.S.); Department of Pathology, Mary H. Weiser Food Allergy Center, and Rogel Cancer Center, University of Michigan School of Medicine, Ann Arbor, Michigan (C.H.K.); and Department of Medicine, Albert Einstein College of Medicine, Bronx, New York (S.M.)
| | - Roberto Pellicciari
- Department of Cell Biology and Genetics, Palacký University, Olomouc, Czech Republic (Z.D.); Department of Microbiology, University of Pennsylvania, Philadelphia, Pennsylvania (M.K., M.L.); The Center for Clinical Pharmacology, Washington University in St. Louis and St. Louis College of Pharmacy, St. Louis, Missouri (T.P.B.); Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta (B.P.W.); Department of Pharmaceutical Sciences, University of Perugia, Perugia, Italy (A.G., F.G.); TES Pharma, Corso Vannucci, Perugia, Italy (R.P.); The Department of Biological and Environmental Engineering, Cornell University, Ithaca, New York (J.M.); Division of Gastroenterology and Nutrition, UPMC Presbyterian Hospital, Pittsburgh, Pennsylvania (S.J.O.); Division of Gastroenterology and Hepatology, Department of Medicine, Center for Gastrointestinal Biology and Disease, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (R.B.S.); Department of Pathology, Mary H. Weiser Food Allergy Center, and Rogel Cancer Center, University of Michigan School of Medicine, Ann Arbor, Michigan (C.H.K.); and Department of Medicine, Albert Einstein College of Medicine, Bronx, New York (S.M.)
| | - Francesco Galli
- Department of Cell Biology and Genetics, Palacký University, Olomouc, Czech Republic (Z.D.); Department of Microbiology, University of Pennsylvania, Philadelphia, Pennsylvania (M.K., M.L.); The Center for Clinical Pharmacology, Washington University in St. Louis and St. Louis College of Pharmacy, St. Louis, Missouri (T.P.B.); Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta (B.P.W.); Department of Pharmaceutical Sciences, University of Perugia, Perugia, Italy (A.G., F.G.); TES Pharma, Corso Vannucci, Perugia, Italy (R.P.); The Department of Biological and Environmental Engineering, Cornell University, Ithaca, New York (J.M.); Division of Gastroenterology and Nutrition, UPMC Presbyterian Hospital, Pittsburgh, Pennsylvania (S.J.O.); Division of Gastroenterology and Hepatology, Department of Medicine, Center for Gastrointestinal Biology and Disease, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (R.B.S.); Department of Pathology, Mary H. Weiser Food Allergy Center, and Rogel Cancer Center, University of Michigan School of Medicine, Ann Arbor, Michigan (C.H.K.); and Department of Medicine, Albert Einstein College of Medicine, Bronx, New York (S.M.)
| | - John March
- Department of Cell Biology and Genetics, Palacký University, Olomouc, Czech Republic (Z.D.); Department of Microbiology, University of Pennsylvania, Philadelphia, Pennsylvania (M.K., M.L.); The Center for Clinical Pharmacology, Washington University in St. Louis and St. Louis College of Pharmacy, St. Louis, Missouri (T.P.B.); Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta (B.P.W.); Department of Pharmaceutical Sciences, University of Perugia, Perugia, Italy (A.G., F.G.); TES Pharma, Corso Vannucci, Perugia, Italy (R.P.); The Department of Biological and Environmental Engineering, Cornell University, Ithaca, New York (J.M.); Division of Gastroenterology and Nutrition, UPMC Presbyterian Hospital, Pittsburgh, Pennsylvania (S.J.O.); Division of Gastroenterology and Hepatology, Department of Medicine, Center for Gastrointestinal Biology and Disease, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (R.B.S.); Department of Pathology, Mary H. Weiser Food Allergy Center, and Rogel Cancer Center, University of Michigan School of Medicine, Ann Arbor, Michigan (C.H.K.); and Department of Medicine, Albert Einstein College of Medicine, Bronx, New York (S.M.)
| | - Stephen J O'Keefe
- Department of Cell Biology and Genetics, Palacký University, Olomouc, Czech Republic (Z.D.); Department of Microbiology, University of Pennsylvania, Philadelphia, Pennsylvania (M.K., M.L.); The Center for Clinical Pharmacology, Washington University in St. Louis and St. Louis College of Pharmacy, St. Louis, Missouri (T.P.B.); Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta (B.P.W.); Department of Pharmaceutical Sciences, University of Perugia, Perugia, Italy (A.G., F.G.); TES Pharma, Corso Vannucci, Perugia, Italy (R.P.); The Department of Biological and Environmental Engineering, Cornell University, Ithaca, New York (J.M.); Division of Gastroenterology and Nutrition, UPMC Presbyterian Hospital, Pittsburgh, Pennsylvania (S.J.O.); Division of Gastroenterology and Hepatology, Department of Medicine, Center for Gastrointestinal Biology and Disease, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (R.B.S.); Department of Pathology, Mary H. Weiser Food Allergy Center, and Rogel Cancer Center, University of Michigan School of Medicine, Ann Arbor, Michigan (C.H.K.); and Department of Medicine, Albert Einstein College of Medicine, Bronx, New York (S.M.)
| | - R Balfour Sartor
- Department of Cell Biology and Genetics, Palacký University, Olomouc, Czech Republic (Z.D.); Department of Microbiology, University of Pennsylvania, Philadelphia, Pennsylvania (M.K., M.L.); The Center for Clinical Pharmacology, Washington University in St. Louis and St. Louis College of Pharmacy, St. Louis, Missouri (T.P.B.); Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta (B.P.W.); Department of Pharmaceutical Sciences, University of Perugia, Perugia, Italy (A.G., F.G.); TES Pharma, Corso Vannucci, Perugia, Italy (R.P.); The Department of Biological and Environmental Engineering, Cornell University, Ithaca, New York (J.M.); Division of Gastroenterology and Nutrition, UPMC Presbyterian Hospital, Pittsburgh, Pennsylvania (S.J.O.); Division of Gastroenterology and Hepatology, Department of Medicine, Center for Gastrointestinal Biology and Disease, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (R.B.S.); Department of Pathology, Mary H. Weiser Food Allergy Center, and Rogel Cancer Center, University of Michigan School of Medicine, Ann Arbor, Michigan (C.H.K.); and Department of Medicine, Albert Einstein College of Medicine, Bronx, New York (S.M.)
| | - Chang H Kim
- Department of Cell Biology and Genetics, Palacký University, Olomouc, Czech Republic (Z.D.); Department of Microbiology, University of Pennsylvania, Philadelphia, Pennsylvania (M.K., M.L.); The Center for Clinical Pharmacology, Washington University in St. Louis and St. Louis College of Pharmacy, St. Louis, Missouri (T.P.B.); Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta (B.P.W.); Department of Pharmaceutical Sciences, University of Perugia, Perugia, Italy (A.G., F.G.); TES Pharma, Corso Vannucci, Perugia, Italy (R.P.); The Department of Biological and Environmental Engineering, Cornell University, Ithaca, New York (J.M.); Division of Gastroenterology and Nutrition, UPMC Presbyterian Hospital, Pittsburgh, Pennsylvania (S.J.O.); Division of Gastroenterology and Hepatology, Department of Medicine, Center for Gastrointestinal Biology and Disease, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (R.B.S.); Department of Pathology, Mary H. Weiser Food Allergy Center, and Rogel Cancer Center, University of Michigan School of Medicine, Ann Arbor, Michigan (C.H.K.); and Department of Medicine, Albert Einstein College of Medicine, Bronx, New York (S.M.)
| | - Maayan Levy
- Department of Cell Biology and Genetics, Palacký University, Olomouc, Czech Republic (Z.D.); Department of Microbiology, University of Pennsylvania, Philadelphia, Pennsylvania (M.K., M.L.); The Center for Clinical Pharmacology, Washington University in St. Louis and St. Louis College of Pharmacy, St. Louis, Missouri (T.P.B.); Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta (B.P.W.); Department of Pharmaceutical Sciences, University of Perugia, Perugia, Italy (A.G., F.G.); TES Pharma, Corso Vannucci, Perugia, Italy (R.P.); The Department of Biological and Environmental Engineering, Cornell University, Ithaca, New York (J.M.); Division of Gastroenterology and Nutrition, UPMC Presbyterian Hospital, Pittsburgh, Pennsylvania (S.J.O.); Division of Gastroenterology and Hepatology, Department of Medicine, Center for Gastrointestinal Biology and Disease, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (R.B.S.); Department of Pathology, Mary H. Weiser Food Allergy Center, and Rogel Cancer Center, University of Michigan School of Medicine, Ann Arbor, Michigan (C.H.K.); and Department of Medicine, Albert Einstein College of Medicine, Bronx, New York (S.M.)
| | - Sridhar Mani
- Department of Cell Biology and Genetics, Palacký University, Olomouc, Czech Republic (Z.D.); Department of Microbiology, University of Pennsylvania, Philadelphia, Pennsylvania (M.K., M.L.); The Center for Clinical Pharmacology, Washington University in St. Louis and St. Louis College of Pharmacy, St. Louis, Missouri (T.P.B.); Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta (B.P.W.); Department of Pharmaceutical Sciences, University of Perugia, Perugia, Italy (A.G., F.G.); TES Pharma, Corso Vannucci, Perugia, Italy (R.P.); The Department of Biological and Environmental Engineering, Cornell University, Ithaca, New York (J.M.); Division of Gastroenterology and Nutrition, UPMC Presbyterian Hospital, Pittsburgh, Pennsylvania (S.J.O.); Division of Gastroenterology and Hepatology, Department of Medicine, Center for Gastrointestinal Biology and Disease, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (R.B.S.); Department of Pathology, Mary H. Weiser Food Allergy Center, and Rogel Cancer Center, University of Michigan School of Medicine, Ann Arbor, Michigan (C.H.K.); and Department of Medicine, Albert Einstein College of Medicine, Bronx, New York (S.M.)
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Pinheiro da Silva F, Vinicius Macarini Bruzaferro E, Olsen Saraiva Câmara N. Antimicrobial peptides in the gut-brain axis: A straightforward review to unravel some missing links. J Neurosci Res 2020; 98:2384-2389. [PMID: 32945561 DOI: 10.1002/jnr.24729] [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: 03/04/2020] [Revised: 05/26/2020] [Accepted: 08/30/2020] [Indexed: 11/11/2022]
Abstract
Antimicrobial peptides (AMPs) are intriguing molecules, able to directly kill several microorganisms and to regulate multiple aspects of the immune response. Despite the extensive studies on the role of AMPs in the epithelial barrier, placing them as a pivotal line of defense against pathogen invasion, little attention has been directed to their role in the maintenance and modulation of the gut microbiota and, by consequence, of the homeostasis of extra intestinal tissues. Here, we review the recent literature about the microbiome-gut-brain axis, focusing on the role of AMPs in this scenario. We provide a straightforward revision of current data in order to provide an overview of the subject, discussing more in depth some points that, in our opinion, are crucial and have received little attention.
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Affiliation(s)
- Fabiano Pinheiro da Silva
- Laboratório de Emergências Clínicas, Faculdade de Medicina FMUSP, Universidade de São Paulo, São Paulo, Brazil
| | | | - Niels Olsen Saraiva Câmara
- Laboratório de Imunobiologia de Transplantes, Departamento de Imunologia, Instituto de Ciências Biológicas, Universidade de São Paulo, São Paulo, Brazil
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24
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Wu J, Ma N, Johnston LJ, Ma X. Dietary Nutrients Mediate Intestinal Host Defense Peptide Expression. Adv Nutr 2020; 11:92-102. [PMID: 31204774 PMCID: PMC7442325 DOI: 10.1093/advances/nmz057] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 04/14/2019] [Accepted: 05/17/2019] [Indexed: 02/06/2023] Open
Abstract
The intestinal tract is the shared locus of intestinal epithelial cells, immune cells, nutrient digestion and absorption, and microbial survival. The gut in animals faces continuous challenges in communicating with the external environment. Threats from endogenous imbalance and exogenous feeds, especially pathogens, could trigger a disorder of homeostasis, leading to intestinal disease and even systematic disease risk. As a part of the intestinal protective barrier, endogenous host defense peptides (HDPs) play multiple beneficial physiological roles in the gut mucosa. Moreover, enhancing endogenous HDPs is being developed as a new strategy for resisting pathogens and commensal microbes, and to maintain intestinal health and reduce antibiotic use. In recent years, multiple nutrients such as branched-chain amino acids, SCFAs, lactose, zinc, and cholecalciferol (vitamin D3) have been reported to significantly increase HDP expression. Nutritional intervention has received more attention and is viewed as a promising means to defend against pathogenic infections and intestinal inflammation. The present review focuses on current discoveries surrounding HDP expression and nutritional regulation of mechanisms in the gut. Our aim is to provide a comprehensive overview, referable tactics, and novel opinions.
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Affiliation(s)
- Jianmin Wu
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Ning Ma
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Lee J Johnston
- Swine Nutrition and Production, West Central Research and Outreach Center, University of Minnesota, Morris, MN, USA
| | - Xi Ma
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
- Department of Internal Medicine, Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX, USA
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25
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Chen J, Zhai Z, Long H, Yang G, Deng B, Deng J. Inducible expression of defensins and cathelicidins by nutrients and associated regulatory mechanisms. Peptides 2020; 123:170177. [PMID: 31704211 DOI: 10.1016/j.peptides.2019.170177] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2018] [Revised: 10/16/2019] [Accepted: 10/17/2019] [Indexed: 02/07/2023]
Abstract
Host defense peptides (HDPs) are crucial components of the body's first line of defense that protect organisms from infections and mediate immune responses. Defensins and cathelicidins are the two most important families of HDPs in mammals. In this review, we summarize the nutrients that are involved in inducible expression of endogenous defensins and cathelicidins. In addition, the mitogen-activated protein kinases (MAPK), nuclear factor kappa B (NF-κB) and histone deacetylase (HDAC) signaling pathways that play vital roles in the induction of defensin and cathelicidin expression are highlighted. Endogenous defensins and cathelicidins induced by nutrients may be potential alternatives to antibiotic treatments against infection and diseases. This review mainly focuses on the inducible expression and regulatory mechanisms of defensins and cathelicidins in multiple species by different nutrients and the potential applications of defensin- and cathelicidin-inducing nutrients.
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Affiliation(s)
- Jialuo Chen
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, Subtropical Institute of Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Zhenya Zhai
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, Subtropical Institute of Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Hongrong Long
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, Subtropical Institute of Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Guangming Yang
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, Subtropical Institute of Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Baichuan Deng
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, Subtropical Institute of Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou, China.
| | - Jinping Deng
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, Subtropical Institute of Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou, China.
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26
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Singh P, Ochoa Allemant P, Brown J, Perides G, Freedman SD, Martin CR. Effect of polyunsaturated fatty acids on postnatal ileum development using the fat-1 transgenic mouse model. Pediatr Res 2019; 85:556-565. [PMID: 30653193 PMCID: PMC6397682 DOI: 10.1038/s41390-019-0284-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Revised: 12/05/2018] [Accepted: 12/18/2018] [Indexed: 11/09/2022]
Abstract
BACKGROUND Long-chain polyunsaturated fatty acids (LCPUFAs) play a critical role in neonatal health. We hypothesized that LCPUFAs play an essential role in priming postnatal gut development. We studied the effect of LCPUFAs on postnatal gut development using fat-1 transgenic mice, which are capable of converting n-6 to n-3 LCPUFAs, and wild-type (WT) C57BL/6 mice. METHODS Distal ileum sections were collected from fat-1 and WT mice on days 3, 14, and 28. Fatty acid analyses, histology, RT-qPCR and intestinal permeability were performed. RESULTS Fat-1 mice, relative to WT mice, showed increased n-3 LCPUFAs levels (α-linolenic acid, docosahexaenoic acid, and eicosapentaenoic acid, p < 0.05) and decreased arachidonic acid levels (p < 0.05) in the ileum. Preweaning fat-1 mice, compared to WT, showed >50% reduced muc2, Tff3, TLR9, and Camp expression (p < 0.05), markers of the innate immune response. There was a >two-fold increased expression of Fzd5 and EphB2, markers of cell differentiation (p < 0.05), and Fabp2 and 6, regulators of fatty acid transport and metabolism (p < 0.05). Despite reduced expression of tight junction genes, intestinal permeability in fat-1 was comparable to WT mice. CONCLUSIONS Our data support the hypothesis that fatty acid profiles early in development modulate intestinal gene expression in formative domains, such as cell differentiation, tight junctions, other innate host defenses, and lipid metabolism.
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Affiliation(s)
- Pratibha Singh
- Division of Gastroenterology, Beth Israel Deaconess Medical Center, MA,,Harvard Medical School, Boston, MA
| | - Pedro Ochoa Allemant
- Division of Gastroenterology, Beth Israel Deaconess Medical Center, MA,,Harvard Medical School, Boston, MA
| | - Joanne Brown
- Division of Gastroenterology, Beth Israel Deaconess Medical Center, MA,,Harvard Medical School, Boston, MA
| | - George Perides
- Division of Gastroenterology, Beth Israel Deaconess Medical Center, MA,,Harvard Medical School, Boston, MA
| | - Steven D. Freedman
- Division of Gastroenterology, Beth Israel Deaconess Medical Center, MA,,Division of Translational Research, Beth Israel Deaconess Medical Center, MA,,Harvard Medical School, Boston, MA
| | - Camilia R Martin
- Department of Neonatology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
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27
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Haney EF, Straus SK, Hancock REW. Reassessing the Host Defense Peptide Landscape. Front Chem 2019; 7:43. [PMID: 30778385 PMCID: PMC6369191 DOI: 10.3389/fchem.2019.00043] [Citation(s) in RCA: 216] [Impact Index Per Article: 43.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Accepted: 01/15/2019] [Indexed: 12/18/2022] Open
Abstract
Current research has demonstrated that small cationic amphipathic peptides have strong potential not only as antimicrobials, but also as antibiofilm agents, immune modulators, and anti-inflammatories. Although traditionally termed antimicrobial peptides (AMPs) these additional roles have prompted a shift in terminology to use the broader term host defense peptides (HDPs) to capture the multi-functional nature of these molecules. In this review, we critically examined the role of AMPs and HDPs in infectious diseases and inflammation. It is generally accepted that HDPs are multi-faceted mediators of a wide range of biological processes, with individual activities dependent on their polypeptide sequence. In this context, we explore the concept of chemical space as it applies to HDPs and hypothesize that the various functions and activities of this class of molecule exist on independent but overlapping activity landscapes. Finally, we outline several emerging functions and roles of HDPs and highlight how an improved understanding of these processes can potentially be leveraged to more fully realize the therapeutic promise of HDPs.
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Affiliation(s)
- Evan F Haney
- Centre for Microbial Diseases and Immunity Research, University of British Columbia, Vancouver, BC, Canada
| | - Suzana K Straus
- Department of Chemistry, University of British Columbia, Vancouver, BC, Canada
| | - Robert E W Hancock
- Centre for Microbial Diseases and Immunity Research, University of British Columbia, Vancouver, BC, Canada
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28
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Zhou Z, Huang J, Hao H, Wei H, Zhou Y, Peng J. Applications of new functions for inducing host defense peptides and synergy sterilization of medium chain fatty acids in substituting in-feed antibiotics. J Funct Foods 2019. [DOI: 10.1016/j.jff.2018.11.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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Design of Antimicrobial Peptides: Progress Made with Human Cathelicidin LL-37. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1117:215-240. [PMID: 30980360 DOI: 10.1007/978-981-13-3588-4_12] [Citation(s) in RCA: 85] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The incorporation of the innate immune system into humans is essential for survival and health due to the rapid replication of invading microbes and the delayed action of the adaptive immune system. Antimicrobial peptides are important components of human innate immunity. Over 100 such peptides have been identified in various human tissues. Human cathelicidin LL-37 is best studied, and there has been a growing interest in designing new peptides based on LL-37. This chapter describes the alternative processing of the human cathelicidin precursor, protease digestion, and lab cutting of LL-37. Both a synthetic peptide library and structure-based design are utilized to identify the active regions. Although challenging, the determination of the 3D structure of LL-37 enabled the identification of the core antimicrobial region. The minimal region of LL-37 can be function-dependent. We discuss the design and potential applications of LL-37 into antibacterial, antibiofilm, antiviral, antifungal, immune modulating, and anticancer peptides. LL-37 has been engineered into 17BIPHE2, a stable, selective, and potent antimicrobial, antibiofilm, and anticancer peptide. Both 17BIPHE2 and SAAP-148 can eliminate the ESKAPE pathogens and show topical in vivo antibiofilm efficacy. Also discussed are other application strategies, including peptide formulation, antimicrobial implants, and peptide-inducing factors such as vitamin D and sunlight. Finally, we summarize what we learned from peptide design based on human LL-37.
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30
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Lu S, Lu R, Song H, Wu J, Liu X, Zhou X, Yang J, Zhang H, Tang C, Guo H, Hu J, Mao G, Lin H, Su Z, Zheng H. Metabolomic study of natrin-induced apoptosis in SMMC-7721 hepatocellular carcinoma cells by ultra-performance liquid chromatography-quadrupole/time-of-flight mass spectrometry. Int J Biol Macromol 2018; 124:1264-1273. [PMID: 30508545 DOI: 10.1016/j.ijbiomac.2018.11.060] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 11/02/2018] [Accepted: 11/11/2018] [Indexed: 12/21/2022]
Abstract
Natrin, a new member of the cysteine-rich secretory protein (CRISP) family purified from the snake venom of Naja naja atra, has been demonstrated to have anticancer activity. However, the underlying molecular mechanisms need further elucidation. In this study, MTT was used to evaluate cell viability. Apoptotic cells were analyzed by employing a transmission electron microscope (TEM). Metabolomic study of the metabolic perturbations caused by natrin-induced apoptosis in differentiated SMMC-7721 cells was performed for the first time by using integrative ultra-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UPLC-Q/TOF MS). To investigate the possible mechanism in the mitochondrial pathway of natrin-induced apoptosis, we measured apoptosis-related mRNA changes using real-time fluorescent quantitative PCR (FQ-PCR). Cell proliferation was significantly inhibited after treatment with natrin in a dose-dependent manner. Principal component analysis (PCA) and partial least squares-discriminate analysis (PLS-DA) clearly demonstrated that metabolic profiles were affected by natrin. The results of multivariate statistical analysis showed that a total of 13 metabolites were characterized as potential biomarkers highly implicated in natrin-induced apoptosis, which corresponded to fluctuations of five pathways, including sphingolipid metabolism, fatty acid biosynthesis, fatty acid metabolism, glycerophospholipid metabolism and glycosphingolipid biosynthesis. Furthermore, natrin-induced apoptosis showed an increase in the Bax/Bcl-2 ratio in the mitochondrial pathway compared with controls. This study illustrated that rapid and holistic cell metabolomics combining molecular biological approaches might be a powerful tool for evaluating the underlying mechanisms of natrin-induced apoptosis, which would help to deepen specific insights into the anti-hepatoma mechanisms of natrin and facilitate the clinical application of natrin in the future.
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Affiliation(s)
- Shiyin Lu
- Pharmaceutical College, Guangxi Medical University, Nanning, China; Department of Pharmacy, Liuzhou Traditional Chinese Medical Hospital, Liuzhou, China
| | - Rigang Lu
- Guangxi Institute For Food and Drug Control, Nanning, China
| | - Hui Song
- Pharmaceutical College, Guangxi Medical University, Nanning, China.
| | - Jinxia Wu
- Pharmaceutical College, Guangxi Medical University, Nanning, China
| | - Xuwen Liu
- Pharmaceutical College, Guangxi Medical University, Nanning, China
| | - Xiaoling Zhou
- Department of Gastroenterology, Liuzhou Traditional Chinese Medical Hospital, Liuzhou, China
| | - Jianqing Yang
- Department of Pharmacy, Liuzhou Traditional Chinese Medical Hospital, Liuzhou, China
| | - Hongye Zhang
- Pharmaceutical College, Guangxi Medical University, Nanning, China
| | - Chaoling Tang
- Pharmaceutical College, Guangxi Medical University, Nanning, China
| | - Hongwei Guo
- Pharmaceutical College, Guangxi Medical University, Nanning, China
| | - Jian Hu
- Department of Pharmacy, Liuzhou Traditional Chinese Medical Hospital, Liuzhou, China
| | - Guifu Mao
- Department of Pharmacy, Liuzhou Traditional Chinese Medical Hospital, Liuzhou, China
| | - Hanmei Lin
- Gynaecology, The First Affiliated Hospital, Guangxi Traditional Chinese Medicine University, Nanning, China.
| | - Zhiheng Su
- Pharmaceutical College, Guangxi Medical University, Nanning, China.
| | - Hua Zheng
- Medical Scientific Research Center, Guangxi Medical University, Nanning, China.
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Development of a Cell-Based High-Throughput Screening Assay to Identify Porcine Host Defense Peptide-Inducing Compounds. J Immunol Res 2018; 2018:5492941. [PMID: 30581875 PMCID: PMC6276403 DOI: 10.1155/2018/5492941] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 09/19/2018] [Accepted: 09/30/2018] [Indexed: 12/12/2022] Open
Abstract
Novel alternatives to antibiotics are needed for the swine industry, given increasing restrictions on subtherapeutic use of antibiotics. Augmenting the synthesis of endogenous host defense peptides (HDPs) has emerged as a promising antibiotic-alternative approach to disease control and prevention. To facilitate the identification of HDP inducers for swine use, we developed a stable luciferase reporter cell line, IPEC-J2/PBD3-luc, through permanent integration of a luciferase reporter gene driven by a 1.1 kb porcine β-defensin 3 (PBD3) gene promoter in porcine IPEC-J2 intestinal epithelial cells. Such a stable reporter cell line was employed in a high-throughput screening of 148 epigenetic compounds and 584 natural products, resulting in the identification of 41 unique hits with a minimum strictly standardized mean difference (SSMD) value of 3.0. Among them, 13 compounds were further confirmed to give at least a 5-fold increase in the luciferase activity in the stable reporter cell line, with 12 being histone deacetylase (HDAC) inhibitors. Eight compounds were subsequently observed to be comparable to sodium butyrate in inducing PBD3 mRNA expression in parental IPEC-J2 cells in the low micromolar range. Six HDAC inhibitors including suberoylanilide hydroxamine (SAHA), HC toxin, apicidin, panobinostat, SB939, and LAQ824 were additionally found to be highly effective HDP inducers in a porcine 3D4/31 macrophage cell line. Besides PBD3, other HDP genes such as PBD2 and cathelicidins (PG1–5) were concentration-dependently induced by those compounds in both IPEC-J2 and 3D4/31 cells. Furthermore, the antibacterial activities of 3D4/31 cells were augmented following 24 h exposure to HDAC inhibitors. In conclusion, a cell-based high-throughput screening assay was developed for the discovery of porcine HDP inducers, and newly identified HDP-inducing compounds may have potential to be developed as alternatives to antibiotics for applications in swine and possibly other animal species.
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Caprylic acid and nonanoic acid upregulate endogenous host defense peptides to enhance intestinal epithelial immunological barrier function via histone deacetylase inhibition. Int Immunopharmacol 2018; 65:303-311. [PMID: 30342347 DOI: 10.1016/j.intimp.2018.10.022] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Revised: 10/06/2018] [Accepted: 10/14/2018] [Indexed: 12/13/2022]
Abstract
The intestinal epithelial barrier plays a critical role in the etiopathogenesis of ulcerative colitis. This study aims to explore the potential effects and underlying mechanisms of medium chain fatty acids (caprylic acid and nonanoic acid) on intestinal epithelial barrier function. Using the porcine jejunal epithelial cell line IPEC-J2, a well-established model, challenged with Escherichia coli ATCC 43889 (O157:H7), we found that treatment with caprylic acid (C8) and nonanoic acid (C9) significantly reduced bacterial translocation, enhanced antibacterial activity, and remarkably increased the secretion of porcine β-defensins 1 (pBD-1) and pBD-2. Mechanistically, like TSA (a histone deacetylase inhibitor), C8 and C9 attenuated the activity of the classical histone deacetylase pathway to facilitate the acetylation of histone 3 lysine 9 (H3K9) at the promoters pBD-1 and pBD-2, and consequently augmented the gene expression of pBD-1 and pBD-2. In conclusion, with their combined antibacterial and defense peptide-induced roles, the use of C8 and C9 may provide a novel method to protect the intestinal barrier of animals and humans from bacterial infection.
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van Dijk A, Hedegaard CJ, Haagsman HP, Heegaard PMH. The potential for immunoglobulins and host defense peptides (HDPs) to reduce the use of antibiotics in animal production. Vet Res 2018; 49:68. [PMID: 30060758 PMCID: PMC6066942 DOI: 10.1186/s13567-018-0558-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Accepted: 06/28/2018] [Indexed: 02/08/2023] Open
Abstract
Innate defense mechanisms are aimed at quickly containing and removing infectious microorganisms and involve local stromal and immune cell activation, neutrophil recruitment and activation and the induction of host defense peptides (defensins and cathelicidins), acute phase proteins and complement activation. As an alternative to antibiotics, innate immune mechanisms are highly relevant as they offer rapid general ways to, at least partially, protect against infections and enable the build-up of a sufficient adaptive immune response. This review describes two classes of promising alternatives to antibiotics based on components of the innate host defense. First we describe immunoglobulins applied to mimic the way in which they work in the newborn as locally acting broadly active defense molecules enforcing innate immunity barriers. Secondly, the potential of host defense peptides with different modes of action, used directly, induced in situ or used as vaccine adjuvants is described.
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Affiliation(s)
- Albert van Dijk
- Division Molecular Host Defence, Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Chris J. Hedegaard
- Innate Immunology Group, National Veterinary Institute, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Henk P. Haagsman
- Division Molecular Host Defence, Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Peter M. H. Heegaard
- Innate Immunology Group, National Veterinary Institute, Technical University of Denmark, Kongens Lyngby, Denmark
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Nath A, Haktanirlar G, Varga Á, Molnár MA, Albert K, Galambos I, Koris A, Vatai G. Biological Activities of Lactose-Derived Prebiotics and Symbiotic with Probiotics on Gastrointestinal System. ACTA ACUST UNITED AC 2018; 54:medicina54020018. [PMID: 30344249 PMCID: PMC6037253 DOI: 10.3390/medicina54020018] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2018] [Revised: 03/23/2018] [Accepted: 04/04/2018] [Indexed: 02/07/2023]
Abstract
Lactose-derived prebiotics provide wide ranges of gastrointestinal comforts. In this review article, the probable biochemical mechanisms through which lactose-derived prebiotics offer positive gastrointestinal health are reported along with the up-to-date results of clinical investigations; this might be the first review article of its kind, to the best of our knowledge. Lactose-derived prebiotics have unique biological and functional values, and they are confirmed as ‘safe’ by the Food and Drug Administration federal agency. Medical practitioners frequently recommend them as therapeutics as a pure form or combined with dairy-based products (yoghurt, milk and infant formulas) or fruit juices. The biological activities of lactose-derived prebiotics are expressed in the presence of gut microflora, mainly probiotics (Lactobacillus spp. in the small intestine and Bifidobacterium spp. in the large intestine). Clinical investigations reveal that galacto-oligosaccharide reduces the risks of several types of diarrhea (traveler’s diarrhea, osmotic diarrhea and Clostridium difficile associated relapsing diarrhea). Lactulose and lactosucrose prevent inflammatory bowel diseases (Crohn’s disease and ulcerative colitis). Lactulose and lactitol reduce the risk of hepatic encephalopathy. Furthermore, lactulose, galacto-oligosaccharide and lactitol prevent constipation in individuals of all ages. It is expected that the present review article will receive great attention from medical practitioners and food technologists.
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Affiliation(s)
- Arijit Nath
- Department of Food Engineering, Faculty of Food Science, Szent István University, Ménesi st 44, H-1118 Budapest, Hungary.
- Soós Ernő Water Technology Research Centre, Faculty of Engineering, University of Pannonia, Zrínyi M. u. 18, H-8800 Nagykanizsa, Hungary.
| | - Gokce Haktanirlar
- Department of Food Engineering, Faculty of Food Science, Szent István University, Ménesi st 44, H-1118 Budapest, Hungary.
| | - Áron Varga
- Department of Food Engineering, Faculty of Food Science, Szent István University, Ménesi st 44, H-1118 Budapest, Hungary.
| | - Máté András Molnár
- Department of Food Engineering, Faculty of Food Science, Szent István University, Ménesi st 44, H-1118 Budapest, Hungary.
| | - Krisztina Albert
- Department of Food Engineering, Faculty of Food Science, Szent István University, Ménesi st 44, H-1118 Budapest, Hungary.
| | - Ildikó Galambos
- Soós Ernő Water Technology Research Centre, Faculty of Engineering, University of Pannonia, Zrínyi M. u. 18, H-8800 Nagykanizsa, Hungary.
| | - András Koris
- Department of Food Engineering, Faculty of Food Science, Szent István University, Ménesi st 44, H-1118 Budapest, Hungary.
| | - Gyula Vatai
- Department of Food Engineering, Faculty of Food Science, Szent István University, Ménesi st 44, H-1118 Budapest, Hungary.
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Dietary modulation of endogenous host defense peptide synthesis as an alternative approach to in-feed antibiotics. ACTA ACUST UNITED AC 2018; 4:160-169. [PMID: 30140755 PMCID: PMC6104571 DOI: 10.1016/j.aninu.2018.01.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2017] [Revised: 01/01/2018] [Accepted: 01/06/2018] [Indexed: 12/11/2022]
Abstract
Traditionally, antibiotics are included in animal feed at subtherapeutic levels for growth promotion and disease prevention. However, recent links between in-feed antibiotics and a rise in antibiotic-resistant pathogens have led to a ban of all antibiotics in livestock production by the European Union in January 2006 and a removal of medically important antibiotics in animal feeds in the United States in January 2017. An urgent need arises for antibiotic alternatives capable of maintaining animal health and productivity without triggering antimicrobial resistance. Host defense peptides (HDP) are a critical component of the animal innate immune system with direct antimicrobial and immunomodulatory activities. While in-feed supplementation of recombinant or synthetic HDP appears to be effective in maintaining animal performance and alleviating clinical symptoms in the context of disease, dietary modulation of the synthesis of endogenous host defense peptides has emerged as a cost-effective, antibiotic-alternative approach to disease control and prevention. Several different classes of small-molecule compounds have been found capable of promoting HDP synthesis. Among the most efficacious compounds are butyrate and vitamin D. Moreover, butyrate and vitamin D synergize with each other in enhancing HDP synthesis. This review will focus on the regulation of HDP synthesis by butyrate and vitamin D in humans, chickens, pigs, and cattle and argue for potential application of HDP-inducing compounds in antibiotic-free livestock production.
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Mohammed I, Said DG, Dua HS. Human antimicrobial peptides in ocular surface defense. Prog Retin Eye Res 2017; 61:1-22. [DOI: 10.1016/j.preteyeres.2017.03.004] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Revised: 03/22/2017] [Accepted: 03/27/2017] [Indexed: 01/17/2023]
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Alcayaga-Miranda F, Cuenca J, Khoury M. Antimicrobial Activity of Mesenchymal Stem Cells: Current Status and New Perspectives of Antimicrobial Peptide-Based Therapies. Front Immunol 2017; 8:339. [PMID: 28424688 PMCID: PMC5371613 DOI: 10.3389/fimmu.2017.00339] [Citation(s) in RCA: 161] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 03/09/2017] [Indexed: 12/20/2022] Open
Abstract
While mesenchymal stem cells (MSCs)-based therapy appears to be promising, there are concerns regarding possible side effects related to the unwanted suppression of antimicrobial immunity leading to an increased risk of infection. Conversely, recent data show that MSCs exert strong antimicrobial effects through indirect and direct mechanisms, partially mediated by the secretion of antimicrobial peptides and proteins (AMPs). In fact, MSCs have been reported to increase bacterial clearance in preclinical models of sepsis, acute respiratory distress syndrome, and cystic fibrosis-related infections. This article reviews the current evidence regarding the direct antimicrobial effector function of MSCs, focusing mainly on the role of MSCs-derived AMPs. The strategies that might modulate the expression and secretion of these AMPs, leading to enhanced antimicrobial effect, are highlighted. Furthermore, studies evaluating the presence of AMPs in the cargo of extracellular vesicles (EVs) are underlined as perspective opportunities to develop new drug delivery tools. The antimicrobial potential of MSCs-derived EVs can also be heightened through cell conditioning and/or drug loading. Finally, improving the pharmacokinetics and delivery, in addition to deciphering the multi-target drug status of AMPs, should synergistically lead to key advances against infections caused by drug-resistant strains.
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Affiliation(s)
- Francisca Alcayaga-Miranda
- Laboratory of Nano-Regenerative Medicine, Faculty of Medicine, Universidad de Los Andes, Santiago, Chile.,Cells for Cells, Santiago, Chile
| | - Jimena Cuenca
- Laboratory of Nano-Regenerative Medicine, Faculty of Medicine, Universidad de Los Andes, Santiago, Chile.,Cells for Cells, Santiago, Chile
| | - Maroun Khoury
- Laboratory of Nano-Regenerative Medicine, Faculty of Medicine, Universidad de Los Andes, Santiago, Chile.,Cells for Cells, Santiago, Chile.,Consorcio Regenero, Chilean Consortium for Regenerative Medicine, Santiago, Chile
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Alva-Murillo N, Ochoa-Zarzosa A, López-Meza JE. Sodium Octanoate Modulates the Innate Immune Response of Bovine Mammary Epithelial Cells through the TLR2/P38/JNK/ERK1/2 Pathway: Implications during Staphylococcus aureus Internalization. Front Cell Infect Microbiol 2017; 7:78. [PMID: 28361042 PMCID: PMC5350129 DOI: 10.3389/fcimb.2017.00078] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2016] [Accepted: 02/27/2017] [Indexed: 12/19/2022] Open
Abstract
Bovine mammary epithelial cells (bMECs) contribute to mammary gland defense against invading pathogens, such as Staphylococcus aureus (intracellular facultative), which is recognized by TLR2. In a previous report, we showed that sodium octanoate [NaO, a medium chain fatty acid (C8)] induces (0.25 mM) or inhibits (1 mM) S. aureus internalization into bMECs and differentially regulates the innate immune response (IIR). However, the molecular mechanisms have not been described, which was the aim of this study. The results showed that α5β1 integrin membrane abundance (MA) was increased in 0.25 mM NaO-treated cells, but TLR2 or CD36 MA was not modified. When these receptors were blocked individually, 0.25 mM NaO-increased S. aureus internalization was notably reduced. Interestingly, in this condition, the IIR of the bMECs was impaired because MAPK (p38, JNK, and ERK1/2) phosphorylation and the activation of transcription factors related to these pathways were decreased. In addition, the 1 mM NaO treatment induced TLR2 MA, but neither the integrin nor CD36 MA was modified. The reduction in S. aureus internalization induced by 1 mM NaO was increased further when TLR2 was blocked. In addition, the phosphorylation levels of the MAPKs increased, and 13 transcriptional factors related to the IIR were slightly activated (CBF, CDP, c-Myb, AP-1, Ets-1/Pea-3, FAST-1, GAS/ISRE, AP-2, NFAT-1, OCT-1, RAR/DR-5, RXR/DR-1, and Stat-3). Moreover, the 1 mM NaO treatment up-regulated gene expression of IL-8 and RANTES and secretion of IL-1β. Notably, when 1 mM NaO-treated bMECs were challenged with S. aureus, the gene expression of IL-8 and IL-10 increased, while IL-1β secretion was reduced. In conclusion, our results showed that α5β1 integrin, TLR2 and CD36 are involved in 0.25 mM NaO-increased S. aureus internalization in bMECs. In addition, 1 mM NaO activates bMECs via the TLR2 signaling pathways (p38, JNK, and ERK1/2), which improves IIR before S. aureus invasion. Additionally, NaO (1 mM) might exert anti-inflammatory effects after bacterial internalization.
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Affiliation(s)
- Nayeli Alva-Murillo
- Licenciatura en Genómica Alimentaria, Universidad de La Ciénega del Estado de Michoacán de OcampoSahuayo, Mexico
| | - Alejandra Ochoa-Zarzosa
- Facultad de Medicina Veterinaria y Zootecnia, Centro Multidisciplinario de Estudios en Biotecnología, Universidad Michoacana de San Nicolás de HidalgoMorelia, Mexico
| | - Joel E. López-Meza
- Facultad de Medicina Veterinaria y Zootecnia, Centro Multidisciplinario de Estudios en Biotecnología, Universidad Michoacana de San Nicolás de HidalgoMorelia, Mexico
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Bachmann M, Meissner C, Pfeilschifter J, Mühl H. Cooperation between the bacterial-derived short-chain fatty acid butyrate and interleukin-22 detected in human Caco2 colon epithelial/carcinoma cells. Biofactors 2017; 43:283-292. [PMID: 27801948 DOI: 10.1002/biof.1341] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2016] [Revised: 09/28/2016] [Accepted: 10/04/2016] [Indexed: 12/29/2022]
Abstract
By generating biologically active factors luminal microbiota shape the intestinal micro-milieu thereby regulating pathological processes such as inflammation and carcinogenesis. Preclinical data suggest that bacterial-derived butyrate and the signal transducer and activator of transcription (STAT)-3 activating cytokine interleukin (IL)-22 display concordant protective properties at the inflamed colonic epithelium. Herein, biochemical cooperation between the short-chain fatty acid butyrate and IL-22 was investigated by focusing on human Caco2 colon epithelial/carcinoma cells. We report that physiological levels of butyrate enhance IL-22 signaling thereby enforcing expression of the prototypic STAT3-downstrean target genes α1-antichymotrypsin and suppressor of cytokine signaling (SOCS)-3. A dual mode of butyrate action on the IL-22/STAT3 axis was identified. Butyrate acted by upregulating IL-22R1, the decisive chain of the heterodimeric IL-22 receptor, and, independent from that, has the potential to directly amplify STAT3-mediated gene activation as detected by chromatin immunoprecipitation analysis of STAT3 binding to the SOCS3 promoter. Since trichostatin A acted similarly, inhibition of histone deacetylases is likely at the root of these butyrate biological properties. The mutual benefit gained from interactions between the host and commensal intestinal bacteria-derived factors is an expanding field of research beginning to affect clinical practice. Data presented herein propose a supportive and fine-tuning role for butyrate in IL-22 signaling that might be therapeutically exploited by local butyrate administration or by increasing its bacterial production in the context of a fiber-rich diet. © 2016 BioFactors, 43(2):283-292, 2017.
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Affiliation(s)
- Malte Bachmann
- Pharmazentrum Frankfurt/ZAFES, University Hospital Goethe-University Frankfurt, 60590 Frankfurt am Main, Germany
| | - Carlotta Meissner
- Pharmazentrum Frankfurt/ZAFES, University Hospital Goethe-University Frankfurt, 60590 Frankfurt am Main, Germany
| | - Josef Pfeilschifter
- Pharmazentrum Frankfurt/ZAFES, University Hospital Goethe-University Frankfurt, 60590 Frankfurt am Main, Germany
| | - Heiko Mühl
- Pharmazentrum Frankfurt/ZAFES, University Hospital Goethe-University Frankfurt, 60590 Frankfurt am Main, Germany
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40
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Smolinska S, Groeger D, O'Mahony L. Biology of the Microbiome 1: Interactions with the Host Immune Response. Gastroenterol Clin North Am 2017; 46:19-35. [PMID: 28164850 DOI: 10.1016/j.gtc.2016.09.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The intestinal immune system is intimately connected with the vast diversity of microbes present within the gut and the diversity of food components that are consumed daily. The discovery of novel molecular mechanisms, which mediate host-microbe-nutrient communication, have highlighted the important roles played by microbes and dietary factors in influencing mucosal immune responses. Dendritic cells, epithelial cells, innate lymphoid cells, T regulatory cells, effector lymphocytes, natural killer T cells, and B cells can all be influenced by the microbiome. Many of the mechanisms being described are bacterial strain or metabolite specific.
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Affiliation(s)
- Sylwia Smolinska
- Department of Clinical Immunology, Wroclaw Medical University, Chalubinskiego 5, Wroclaw 50-368, Poland
| | - David Groeger
- Alimentary Health Pharma Davos, Obere Strasse 22, Davos Platz 7270, Switzerland
| | - Liam O'Mahony
- Molecular Immunology, Swiss Institute of Allergy and Asthma Research, University of Zurich, Obere Strasse 22, Davos Platz 7270, Switzerland.
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41
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Alcayaga-Miranda F, Cuenca J, Khoury M. Antimicrobial Activity of Mesenchymal Stem Cells: Current Status and New Perspectives of Antimicrobial Peptide-Based Therapies. Front Immunol 2017. [PMID: 28424688 DOI: 10.3389/fimmu.2017.0033] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023] Open
Abstract
While mesenchymal stem cells (MSCs)-based therapy appears to be promising, there are concerns regarding possible side effects related to the unwanted suppression of antimicrobial immunity leading to an increased risk of infection. Conversely, recent data show that MSCs exert strong antimicrobial effects through indirect and direct mechanisms, partially mediated by the secretion of antimicrobial peptides and proteins (AMPs). In fact, MSCs have been reported to increase bacterial clearance in preclinical models of sepsis, acute respiratory distress syndrome, and cystic fibrosis-related infections. This article reviews the current evidence regarding the direct antimicrobial effector function of MSCs, focusing mainly on the role of MSCs-derived AMPs. The strategies that might modulate the expression and secretion of these AMPs, leading to enhanced antimicrobial effect, are highlighted. Furthermore, studies evaluating the presence of AMPs in the cargo of extracellular vesicles (EVs) are underlined as perspective opportunities to develop new drug delivery tools. The antimicrobial potential of MSCs-derived EVs can also be heightened through cell conditioning and/or drug loading. Finally, improving the pharmacokinetics and delivery, in addition to deciphering the multi-target drug status of AMPs, should synergistically lead to key advances against infections caused by drug-resistant strains.
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Affiliation(s)
- Francisca Alcayaga-Miranda
- Laboratory of Nano-Regenerative Medicine, Faculty of Medicine, Universidad de Los Andes, Santiago, Chile
- Cells for Cells, Santiago, Chile
| | - Jimena Cuenca
- Laboratory of Nano-Regenerative Medicine, Faculty of Medicine, Universidad de Los Andes, Santiago, Chile
- Cells for Cells, Santiago, Chile
| | - Maroun Khoury
- Laboratory of Nano-Regenerative Medicine, Faculty of Medicine, Universidad de Los Andes, Santiago, Chile
- Cells for Cells, Santiago, Chile
- Consorcio Regenero, Chilean Consortium for Regenerative Medicine, Santiago, Chile
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Kuroda K, Okumura K, Isogai H, Isogai E. The Human Cathelicidin Antimicrobial Peptide LL-37 and Mimics are Potential Anticancer Drugs. Front Oncol 2015; 5:144. [PMID: 26175965 PMCID: PMC4485164 DOI: 10.3389/fonc.2015.00144] [Citation(s) in RCA: 103] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Accepted: 06/15/2015] [Indexed: 01/08/2023] Open
Abstract
Antimicrobial peptides (AMPs) play a critical role in innate host defense against microbial pathogens in many organisms. The human cathelicidin, LL-37, has a net positive charge and is amphiphilic, and can eliminate pathogenic microbes directly via electrostatic attraction toward negatively charged bacterial membranes. A number of studies have shown that LL-37 participates in various host immune systems, such as inflammatory responses and tissue repair, in addition to its antibacterial properties. Moreover, recent evidence suggests that it is also involved in the regulation of cancer. Indeed, previous studies have suggested that human LL-37 is involved in carcinogenesis via multiple reporters, such as FPR2 (FPRL1), epidermal growth factor receptor, and ERBb2, although LL-37 and its fragments and analogs also show anticancer effects in various cancer cell lines. This discrepancy can be attributed to peptide-based factors, host membrane-based factors, and signal regulation. Here, we describe the association between AMPs and cancer with a focus on anticancer peptide functions and selectivity in an effort to understand potential therapeutic implications.
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Affiliation(s)
- Kengo Kuroda
- Laboratory of Animal Microbiology, Graduate School of Agricultural Science, Tohoku University , Sendai , Japan
| | - Kazuhiko Okumura
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Health Sciences University of Hokkaido , Hokkaido , Japan
| | - Hiroshi Isogai
- Animal Research Center, Sapporo Medical University , Sapporo , Japan
| | - Emiko Isogai
- Laboratory of Animal Microbiology, Graduate School of Agricultural Science, Tohoku University , Sendai , Japan
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Frei R, Akdis M, O'Mahony L. Prebiotics, probiotics, synbiotics, and the immune system: experimental data and clinical evidence. Curr Opin Gastroenterol 2015; 31:153-8. [PMID: 25594887 DOI: 10.1097/mog.0000000000000151] [Citation(s) in RCA: 152] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
PURPOSE OF REVIEW The intestinal immune system is constantly exposed to foreign antigens, which for the most part should be tolerated. Certain probiotics, prebiotics, and synbiotics are able to influence immune responses. In this review, we highlight the recent publications (within the last 2 years) that have substantially progressed this field. RECENT FINDINGS The immunological mechanisms underpinning probiotics, prebiotics, and synbiotics effects continue to be better defined with novel mechanisms being described for dendritic cells, epithelial cells, T regulatory cells, effector lymphocytes, natural killer T cells, and B cells. Many of the mechanisms being described are bacterial strain or metabolite specific, and should not be extrapolated to other probiotics or prebiotics. In addition, the timing of intervention seems to be important, with potentially the greatest effects being observed early in life. SUMMARY In this review, we discuss the recent findings relating to probiotics, prebiotics, and synbiotics, specifically their effects on immunological functions.
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Affiliation(s)
- Remo Frei
- aSwiss Institute of Allergy and Asthma Research, University of Zurich bChristine Kühne - Center for Allergy Research and Education (CK-CARE), Davos, Switzerland
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44
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Wang G. Human antimicrobial peptides and proteins. Pharmaceuticals (Basel) 2014; 7:545-94. [PMID: 24828484 PMCID: PMC4035769 DOI: 10.3390/ph7050545] [Citation(s) in RCA: 337] [Impact Index Per Article: 33.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Revised: 04/15/2014] [Accepted: 04/29/2014] [Indexed: 12/11/2022] Open
Abstract
As the key components of innate immunity, human host defense antimicrobial peptides and proteins (AMPs) play a critical role in warding off invading microbial pathogens. In addition, AMPs can possess other biological functions such as apoptosis, wound healing, and immune modulation. This article provides an overview on the identification, activity, 3D structure, and mechanism of action of human AMPs selected from the antimicrobial peptide database. Over 100 such peptides have been identified from a variety of tissues and epithelial surfaces, including skin, eyes, ears, mouths, gut, immune, nervous and urinary systems. These peptides vary from 10 to 150 amino acids with a net charge between -3 and +20 and a hydrophobic content below 60%. The sequence diversity enables human AMPs to adopt various 3D structures and to attack pathogens by different mechanisms. While α-defensin HD-6 can self-assemble on the bacterial surface into nanonets to entangle bacteria, both HNP-1 and β-defensin hBD-3 are able to block cell wall biosynthesis by binding to lipid II. Lysozyme is well-characterized to cleave bacterial cell wall polysaccharides but can also kill bacteria by a non-catalytic mechanism. The two hydrophobic domains in the long amphipathic α-helix of human cathelicidin LL-37 lays the basis for binding and disrupting the curved anionic bacterial membrane surfaces by forming pores or via the carpet model. Furthermore, dermcidin may serve as ion channel by forming a long helix-bundle structure. In addition, the C-type lectin RegIIIα can initially recognize bacterial peptidoglycans followed by pore formation in the membrane. Finally, histatin 5 and GAPDH(2-32) can enter microbial cells to exert their effects. It appears that granulysin enters cells and kills intracellular pathogens with the aid of pore-forming perforin. This arsenal of human defense proteins not only keeps us healthy but also inspires the development of a new generation of personalized medicine to combat drug-resistant superbugs, fungi, viruses, parasites, or cancer. Alternatively, multiple factors (e.g., albumin, arginine, butyrate, calcium, cyclic AMP, isoleucine, short-chain fatty acids, UV B light, vitamin D, and zinc) are able to induce the expression of antimicrobial peptides, opening new avenues to the development of anti-infectious drugs.
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Affiliation(s)
- Guangshun Wang
- Department of Pathology and Microbiology, College of Medicine, University of Nebraska Medical Center, 986495 Nebraska Medical Center, Omaha, NE 68198-6495, USA.
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