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Malinczak CA, Burns Naas LA, Clark A, Conze D, DiNovi M, Kaminski N, Kruger C, Lönnerdal B, Lukacs NW, Merker R, Peterson R. Workshop report: A study roadmap to evaluate the safety of recombinant human lactoferrin expressed in Komagataella phaffii intended as an ingredient in conventional foods - Recommendations of a scientific expert panel. Food Chem Toxicol 2024; 190:114817. [PMID: 38880466 DOI: 10.1016/j.fct.2024.114817] [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: 04/09/2024] [Revised: 06/03/2024] [Accepted: 06/12/2024] [Indexed: 06/18/2024]
Abstract
Human milk lactoferrin (hmLF) is a glycoprotein with well-known effects on immune function. Helaina Inc. has used a glycoengineered yeast, Komatagaella phaffii, to produce recombinant human lactoferrin (Helaina rhLF, Effera™) that is structurally similar to hmLF with intended uses as a food ingredient. However, earlier FDA reviews of rhLF were withdrawn due to insufficient safety data and unanswered safety questions the experts and FDA raised about the immunogenicity/immunotoxicity risks of orally ingested rhLF. Helaina organized a panel of leading scientists to build and vet a safety study roadmap containing the studies and safety endpoints needed to address these questions. Panelists participated in a one-day virtual workshop in June 2023 and ensuing discussions through July 2023. Relevant workshop topics included physicochemical properties of LF, regulatory history of bovine LF and rhLF as food ingredients in the FDA's generally recognized as safe (GRAS) program, and synopses of publicly available studies on the immunogenicity/alloimmunization, immunotoxicology, iron homeostasis, and absorption, distribution, metabolism, and excretion of rhLF. Panelists concluded that the safety study roadmap addresses the unanswered safety questions and the intended safe use of rhLF as a food ingredient for adults and agreed on broad applications of the roadmap to assess the safety and support GRAS of other recombinant milk proteins with immunomodulatory functions.
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Affiliation(s)
| | | | | | | | | | - Norbert Kaminski
- Department of Pharmacology & Toxicology, Institute for Integrative Toxicology, Michigan State University, East Lansing, MI, USA.
| | | | - Bo Lönnerdal
- Department of Internal Medicine, University of California, Davis, CA, USA.
| | - Nicholas W Lukacs
- Mary H. Weiser Food Allergy Center, University of Michigan, Ann Arbor, MI, USA.
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Eker F, Akdaşçi E, Duman H, Yalçıntaş YM, Canbolat AA, Kalkan AE, Karav S, Šamec D. Antimicrobial Properties of Colostrum and Milk. Antibiotics (Basel) 2024; 13:251. [PMID: 38534686 DOI: 10.3390/antibiotics13030251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 03/07/2024] [Accepted: 03/08/2024] [Indexed: 03/28/2024] Open
Abstract
The growing number of antibiotic resistance genes is putting a strain on the ecosystem and harming human health. In addition, consumers have developed a cautious attitude towards chemical preservatives. Colostrum and milk are excellent sources of antibacterial components that help to strengthen the immunity of the offspring and accelerate the maturation of the immune system. It is possible to study these important defenses of milk and colostrum, such as lactoferrin, lysozyme, immunoglobulins, oligosaccharides, etc., as biotherapeutic agents for the prevention and treatment of numerous infections caused by microbes. Each of these components has different mechanisms and interactions in various places. The compound's mechanisms of action determine where the antibacterial activity appears. The activation of the antibacterial activity of milk and colostrum compounds can start in the infant's mouth during lactation and continue in the gastrointestinal regions. These antibacterial properties possess potential for therapeutic uses. In order to discover new perspectives and methods for the treatment of bacterial infections, additional investigations of the mechanisms of action and potential complexes are required.
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Affiliation(s)
- Furkan Eker
- Department of Molecular Biology and Genetics, Çanakkale Onsekiz Mart University, Çanakkale 17000, Turkey
| | - Emir Akdaşçi
- Department of Molecular Biology and Genetics, Çanakkale Onsekiz Mart University, Çanakkale 17000, Turkey
| | - Hatice Duman
- Department of Molecular Biology and Genetics, Çanakkale Onsekiz Mart University, Çanakkale 17000, Turkey
| | - Yalçın Mert Yalçıntaş
- Department of Molecular Biology and Genetics, Çanakkale Onsekiz Mart University, Çanakkale 17000, Turkey
| | - Ahmet Alperen Canbolat
- Department of Molecular Biology and Genetics, Çanakkale Onsekiz Mart University, Çanakkale 17000, Turkey
| | - Arda Erkan Kalkan
- Department of Molecular Biology and Genetics, Çanakkale Onsekiz Mart University, Çanakkale 17000, Turkey
| | - Sercan Karav
- Department of Molecular Biology and Genetics, Çanakkale Onsekiz Mart University, Çanakkale 17000, Turkey
| | - Dunja Šamec
- Department of Food Technology, University North, Trg Dr. Žarka Dolinara 1, 48000 Koprivnica, Croatia
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Peña-Juárez MC, Guadarrama-Escobar OR, Serrano-Castañeda P, Méndez-Albores A, Vázquez-Durán A, Vera-Graziano R, Rodríguez-Pérez B, Salgado-Machuca M, Anguiano-Almazán E, Morales-Florido MI, Rodríguez-Cruz IM, Escobar-Chávez JJ. Synergistic Effect of Retinoic Acid and Lactoferrin in the Maintenance of Gut Homeostasis. Biomolecules 2024; 14:78. [PMID: 38254678 PMCID: PMC10813542 DOI: 10.3390/biom14010078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 12/26/2023] [Accepted: 01/04/2024] [Indexed: 01/24/2024] Open
Abstract
Lactoferrin (LF) is a glycoprotein that binds to iron ions (Fe2+) and other metallic ions, such as Mg2+, Zn2+, and Cu2+, and has antibacterial and immunomodulatory properties. The antibacterial properties of LF are due to its ability to sequester iron. The immunomodulatory capability of LF promotes homeostasis in the enteric environment, acting directly on the beneficial microbiota. LF can modulate antigen-presenting cell (APC) biology, including migration and cell activation. Nonetheless, some gut microbiota strains produce toxic metabolites, and APCs are responsible for initiating the process that inhibits the inflammatory response against them. Thus, eliminating harmful strains lowers the risk of inducing chronic inflammation, and consequently, metabolic disease, which can progress to type 2 diabetes mellitus (T2DM). LF and retinoic acid (RA) exhibit immunomodulatory properties such as decreasing cytokine production, thus modifying the inflammatory response. Their activities have been observed both in vitro and in vivo. The combined, simultaneous effect of these molecules has not been studied; however, the synergistic effect of LF and RA may be employed for enhancing the secretion of humoral factors, such as IgA. We speculate that the combination of LF and RA could be a potential prophylactic alternative for the treatment of metabolic dysregulations such as T2DM. The present review focuses on the importance of a healthy diet for a balanced gut and describes how probiotics and prebiotics with immunomodulatory activity as well as inductors of differentiation and cell proliferation could be acquired directly from the diet or indirectly through the oral administration of formulations aimed to maintain gut health or restore a eubiotic state in an intestinal environment that has been dysregulated by external factors such as stress and a high-fat diet.
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Affiliation(s)
- Ma. Concepción Peña-Juárez
- Unidad de Investigación Multidisciplinaria Lab-12 (Sistemas Transdérmicos y Materiales Nanoestructurados), Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, Carretera Cuautitlán Teoloyucan, Km 2.5, San Sebastián Xhala, Cuautitlán Izcalli 54714, Mexico; (M.C.P.-J.); (O.R.G.-E.); (P.S.-C.); (M.S.-M.); (E.A.-A.); (M.I.M.-F.)
| | - Omar Rodrigo Guadarrama-Escobar
- Unidad de Investigación Multidisciplinaria Lab-12 (Sistemas Transdérmicos y Materiales Nanoestructurados), Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, Carretera Cuautitlán Teoloyucan, Km 2.5, San Sebastián Xhala, Cuautitlán Izcalli 54714, Mexico; (M.C.P.-J.); (O.R.G.-E.); (P.S.-C.); (M.S.-M.); (E.A.-A.); (M.I.M.-F.)
| | - Pablo Serrano-Castañeda
- Unidad de Investigación Multidisciplinaria Lab-12 (Sistemas Transdérmicos y Materiales Nanoestructurados), Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, Carretera Cuautitlán Teoloyucan, Km 2.5, San Sebastián Xhala, Cuautitlán Izcalli 54714, Mexico; (M.C.P.-J.); (O.R.G.-E.); (P.S.-C.); (M.S.-M.); (E.A.-A.); (M.I.M.-F.)
| | - Abraham Méndez-Albores
- Unidad de Investigación Multidisciplinaria Lab-14 (Ciencia y Tecnología de los Materiales), Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, Carretera Cuautitlán Teoloyucan, Km 2.5, San Sebastián Xhala, Cuautitlán Izcalli 54714, Mexico; (A.M.-A.); (A.V.-D.)
| | - Alma Vázquez-Durán
- Unidad de Investigación Multidisciplinaria Lab-14 (Ciencia y Tecnología de los Materiales), Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, Carretera Cuautitlán Teoloyucan, Km 2.5, San Sebastián Xhala, Cuautitlán Izcalli 54714, Mexico; (A.M.-A.); (A.V.-D.)
| | - Ricardo Vera-Graziano
- Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Apartado Postal 70-360, Ciudad Universitaria, Coyoacán, Ciudad de México 04510, Mexico;
| | - Betsabé Rodríguez-Pérez
- Laboratorio de Servicio de Análisis de Propóleos (LASAP), Unidad de Investigación Multidisciplinaria (UIM), Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, Cuautitlán Izcalli 54714, Mexico;
| | - Mariana Salgado-Machuca
- Unidad de Investigación Multidisciplinaria Lab-12 (Sistemas Transdérmicos y Materiales Nanoestructurados), Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, Carretera Cuautitlán Teoloyucan, Km 2.5, San Sebastián Xhala, Cuautitlán Izcalli 54714, Mexico; (M.C.P.-J.); (O.R.G.-E.); (P.S.-C.); (M.S.-M.); (E.A.-A.); (M.I.M.-F.)
| | - Ericka Anguiano-Almazán
- Unidad de Investigación Multidisciplinaria Lab-12 (Sistemas Transdérmicos y Materiales Nanoestructurados), Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, Carretera Cuautitlán Teoloyucan, Km 2.5, San Sebastián Xhala, Cuautitlán Izcalli 54714, Mexico; (M.C.P.-J.); (O.R.G.-E.); (P.S.-C.); (M.S.-M.); (E.A.-A.); (M.I.M.-F.)
| | - Miriam Isabel Morales-Florido
- Unidad de Investigación Multidisciplinaria Lab-12 (Sistemas Transdérmicos y Materiales Nanoestructurados), Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, Carretera Cuautitlán Teoloyucan, Km 2.5, San Sebastián Xhala, Cuautitlán Izcalli 54714, Mexico; (M.C.P.-J.); (O.R.G.-E.); (P.S.-C.); (M.S.-M.); (E.A.-A.); (M.I.M.-F.)
- Laboratorio de Farmacia Molecular y Liberación Controlada, Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana, Mexico City 04960, Mexico
| | - Isabel Marlene Rodríguez-Cruz
- Unidad de Enseñanza e Investigación, Hospital Regional e Alta Especialidad de Sumpango, Carretera Zumpango-Jilotzingo #400, Barrio de Santiago, 2ª Sección, Zumpango 55600, Mexico;
| | - José Juan Escobar-Chávez
- Unidad de Investigación Multidisciplinaria Lab-12 (Sistemas Transdérmicos y Materiales Nanoestructurados), Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, Carretera Cuautitlán Teoloyucan, Km 2.5, San Sebastián Xhala, Cuautitlán Izcalli 54714, Mexico; (M.C.P.-J.); (O.R.G.-E.); (P.S.-C.); (M.S.-M.); (E.A.-A.); (M.I.M.-F.)
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Jafari N, Gheitasi R, Khorasani HR, Golpour M, Mehri M, Nayeri K, Pourbagher R, Mostafazadeh M, Kalali B, Mostafazadeh A. Proteome analysis, bioinformatic prediction and experimental evidence revealed immune response down-regulation function for serum-starved human fibroblasts. Heliyon 2023; 9:e19238. [PMID: 37674821 PMCID: PMC10477462 DOI: 10.1016/j.heliyon.2023.e19238] [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: 11/07/2022] [Revised: 06/15/2023] [Accepted: 08/16/2023] [Indexed: 09/08/2023] Open
Abstract
Emerging evidence indicates that fibroblasts play pivotal roles in immunoregulation by producing various proteins under health and disease states. In the present study, for the first time, we compared the proteomes of serum-starved human skin fibroblasts and peripheral blood mononuclear cells (PBMCs) using Nano-LC-ESI-tandem mass spectrometry. This analysis contributes to a better understanding of the underlying molecular mechanisms of chronic inflammation and cancer, which are intrinsically accompanied by growth factor deficiency.The proteomes of starved fibroblasts and PBMCs consisted of 307 and 294 proteins, respectively, which are involved in lymphocyte migration, complement activation, inflammation, acute phase response, and immune regulation. Starved fibroblasts predominantly produced extracellular matrix-related proteins such as collagen/collagenase, while PBMCs produced focal adhesion-related proteins like beta-parvin and vinculin which are involved in lymphocyte migration. PBMCs produced a more diverse set of inflammatory molecules like heat shock proteins, while fibroblasts produced human leukocytes antigen-G and -E that are known as main immunomodulatory molecules. Fifty-four proteins were commonly found in both proteomes, including serum albumin, amyloid-beta, heat shock cognate 71 kDa, and complement C3. GeneMANIA bioinformatic tool predicted 418 functions for PBMCs, including reactive oxygen species metabolic processes and 241 functions for starved fibroblasts such as antigen processing and presentation including non-classical MHC -Ib pathway, and negative regulation of the immune response. Protein-protein interactions network analysis indicated the immunosuppressive function for starved fibroblasts-derived human leucocytes antigen-G and -E. Moreover, in an in vitro model of allogeneic transplantation, the immunosuppressive activity of starved fibroblasts was experimentally documented. Conclusion Under serum starvation-induced metabolic stress, both PBMCs and fibroblasts produced molecules like heat shock proteins and amyloid-beta, which can have pathogenic roles in auto-inflammatory diseases such as rheumatoid arthritis, type 1 diabetes mellitus, systemic lupus erythematosus, aging, and cancer. However, starved fibroblasts showed immunosuppressive activity in an in vitro model of allogeneic transplantation, suggesting their potential to modify such adverse reactions by down-regulating the immune system.
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Affiliation(s)
- Negar Jafari
- Student Research Committee, Babol University of Medical Sciences, Babol, Iran
- Cellular and Molecular Biology Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
| | - Reza Gheitasi
- Institutes for Infectious Diseases and Infection Control, Jena University Hospital, Jena, Germany
| | - Hamid Reza Khorasani
- Department of Cancer Medicine, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, Academic Center for Education, Culture and Research (ACECR), Babol, Iran
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, Academic Center for Education, Culture and Research (ACECR), Tehran, Iran
| | - Monireh Golpour
- Department of Immunology, Molecular and Cell Biology Research Center, Student Research Committee, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Maryam Mehri
- Student Research Committee, Babol University of Medical Sciences, Babol, Iran
- Cellular and Molecular Biology Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
| | - Kosar Nayeri
- Student Research Committee, Babol University of Medical Sciences, Babol, Iran
- Cellular and Molecular Biology Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
| | - Roghayeh Pourbagher
- Student Research Committee, Babol University of Medical Sciences, Babol, Iran
- Cellular and Molecular Biology Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
| | | | - Behnam Kalali
- Department of Medicine II, Klinikum Grosshadern, LMU University, 81377, Munich, Germany
| | - Amrollah Mostafazadeh
- Cellular and Molecular Biology Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
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Ohradanova-Repic A, Praženicová R, Gebetsberger L, Moskalets T, Skrabana R, Cehlar O, Tajti G, Stockinger H, Leksa V. Time to Kill and Time to Heal: The Multifaceted Role of Lactoferrin and Lactoferricin in Host Defense. Pharmaceutics 2023; 15:1056. [PMID: 37111542 PMCID: PMC10146187 DOI: 10.3390/pharmaceutics15041056] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Revised: 03/16/2023] [Accepted: 03/21/2023] [Indexed: 04/29/2023] Open
Abstract
Lactoferrin is an iron-binding glycoprotein present in most human exocrine fluids, particularly breast milk. Lactoferrin is also released from neutrophil granules, and its concentration increases rapidly at the site of inflammation. Immune cells of both the innate and the adaptive immune system express receptors for lactoferrin to modulate their functions in response to it. On the basis of these interactions, lactoferrin plays many roles in host defense, ranging from augmenting or calming inflammatory pathways to direct killing of pathogens. Complex biological activities of lactoferrin are determined by its ability to sequester iron and by its highly basic N-terminus, via which lactoferrin binds to a plethora of negatively charged surfaces of microorganisms and viruses, as well as to mammalian cells, both normal and cancerous. Proteolytic cleavage of lactoferrin in the digestive tract generates smaller peptides, such as N-terminally derived lactoferricin. Lactoferricin shares some of the properties of lactoferrin, but also exhibits unique characteristics and functions. In this review, we discuss the structure, functions, and potential therapeutic uses of lactoferrin, lactoferricin, and other lactoferrin-derived bioactive peptides in treating various infections and inflammatory conditions. Furthermore, we summarize clinical trials examining the effect of lactoferrin supplementation in disease treatment, with a special focus on its potential use in treating COVID-19.
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Affiliation(s)
- Anna Ohradanova-Repic
- Institute for Hygiene and Applied Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090 Vienna, Austria
| | - Romana Praženicová
- Laboratory of Molecular Immunology, Institute of Molecular Biology, Slovak Academy of Sciences, 845 51 Bratislava, Slovakia
| | - Laura Gebetsberger
- Institute for Hygiene and Applied Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090 Vienna, Austria
| | - Tetiana Moskalets
- Laboratory of Molecular Immunology, Institute of Molecular Biology, Slovak Academy of Sciences, 845 51 Bratislava, Slovakia
| | - Rostislav Skrabana
- Laboratory of Structural Biology of Neurodegeneration, Institute of Neuroimmunology, Slovak Academy of Sciences, 845 10 Bratislava, Slovakia
| | - Ondrej Cehlar
- Laboratory of Structural Biology of Neurodegeneration, Institute of Neuroimmunology, Slovak Academy of Sciences, 845 10 Bratislava, Slovakia
| | - Gabor Tajti
- Institute for Hygiene and Applied Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090 Vienna, Austria
| | - Hannes Stockinger
- Institute for Hygiene and Applied Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090 Vienna, Austria
| | - Vladimir Leksa
- Institute for Hygiene and Applied Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090 Vienna, Austria
- Laboratory of Molecular Immunology, Institute of Molecular Biology, Slovak Academy of Sciences, 845 51 Bratislava, Slovakia
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Kubo S, Miyakawa M, Tada A, Oda H, Motobayashi H, Iwabuchi S, Tamura S, Tanaka M, Hashimoto S. Lactoferrin and its digestive peptides induce interferon-α production and activate plasmacytoid dendritic cells ex vivo. Biometals 2022; 36:563-573. [PMID: 36018422 PMCID: PMC10181974 DOI: 10.1007/s10534-022-00436-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Accepted: 08/15/2022] [Indexed: 11/25/2022]
Abstract
Plasmacytoid dendritic cells (pDCs) recognise viral single-stranded RNA (ssRNA) or CpG DNA via Toll-like receptor (TLR)-7 and TLR9, and produce interferon (IFN)-α. Activated pDCs upregulate human leukocyte antigen (HLA)-DR and CD86 expression levels. Ingestion of bovine lactoferrin (LF) activates pDCs, but little is known about its effects. In this study, the effects of LF and its pepsin hydrolysate (LFH) on the production of IFN-α from peripheral blood mononuclear cells (PBMCs) and pDCs were examined. PBMCs were prepared from peripheral blood of healthy adults and incubated with LF, LFH, or lactoferricin (LFcin) in the absence or presence of ssRNA derived from human immunodeficiency virus. The concentration of IFN-α in the supernatant and the expression levels of IFN-α, HLA-DR, and CD86 in pDCs were quantified by enzyme-linked immunosorbent assay and flow cytometry. In the absence of ssRNA, the concentration of IFN-α was negligible and LF had no effect on it. In the presence of ssRNA, IFN-α was detected at a certain level, and LF and LFH significantly increased its concentration. The increase caused by LFH and LFcin were comparable. In addition, LF significantly upregulated the expression levels of IFN-α, HLA-DR, and CD86 in pDCs. LF and its digestive peptides induced IFN-α production and activated pDCs in the presence of ssRNA, suggesting that LF modulates the immune system by promoting pDC activation upon viral recognition.
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Affiliation(s)
- Shutaro Kubo
- Food Ingredients and Technology Institute, R&D Division, Morinaga Milk Industry Co., Ltd., 1-83, 5, Higashihara, Zama, Kanagawa, Japan.
| | - Momoko Miyakawa
- Food Ingredients and Technology Institute, R&D Division, Morinaga Milk Industry Co., Ltd., 1-83, 5, Higashihara, Zama, Kanagawa, Japan
| | - Asuka Tada
- Food Ingredients and Technology Institute, R&D Division, Morinaga Milk Industry Co., Ltd., 1-83, 5, Higashihara, Zama, Kanagawa, Japan
| | - Hirotsugu Oda
- Food Ingredients and Technology Institute, R&D Division, Morinaga Milk Industry Co., Ltd., 1-83, 5, Higashihara, Zama, Kanagawa, Japan
| | - Hideki Motobayashi
- Second Department of Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama, Wakayama, Japan
| | - Sadahiro Iwabuchi
- Department of Molecular Pathophysiology, Wakayama Medical University, 811-1 Kimiidera, Wakayama, Wakayama, Japan
| | - Shinobu Tamura
- Department of Hematology/Oncology, Wakayama Medical University, 811-1 Kimiidera, Wakayama, Wakayama, Japan
| | - Miyuki Tanaka
- Food Ingredients and Technology Institute, R&D Division, Morinaga Milk Industry Co., Ltd., 1-83, 5, Higashihara, Zama, Kanagawa, Japan
| | - Shinichi Hashimoto
- Department of Molecular Pathophysiology, Wakayama Medical University, 811-1 Kimiidera, Wakayama, Wakayama, Japan
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7
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Xu Y, Wang Y, He J, Zhu W. Antibacterial properties of lactoferrin: A bibliometric analysis from 2000 to early 2022. Front Microbiol 2022; 13:947102. [PMID: 36060777 PMCID: PMC9428516 DOI: 10.3389/fmicb.2022.947102] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 07/13/2022] [Indexed: 11/13/2022] Open
Abstract
BackgroundHere, a bibliometric and knowledge map analysis are used to analyze the research hot spots and development trends regarding the antibacterial effect of lactoferrin (LF). By looking for research hot spots and new topics, we provide new clues and research directions for future research.MethodsArticles and reviews regarding the antibacterial effect of LF were retrieved and from the Web of Science Core Collection (WoSCC) on 25 June 2022. CiteSpace and VOSviewer were used to conduct the bibliometric and knowledge map analysis.ResultsIn total, 8,292 authors at 2,151 institutions from 86 countries published 1,923 articles in 770 academic journals. The United States was the leader regarding research on the antibacterial effects of LF, while the Netherlands was a pioneer in conducting research in this field. The University of California system contributed the most publications. Bolscher JGM published most articles, while Wayne Bellamy had most cocitations. However, there was insufficient cooperation among the various institutions and authors. BioMetals published most LF-antibacterial activity-related articles, whereas Infection and Immunity was most commonly cocited journal. The most influential research hot spots about the antibacterial effect of LF focused on antimicrobial peptides, casein, human milk, expression, and Escherichia coli-related research. The latest hot spots and research frontier included COVID-19, antibiofilm activity, and immune defense.ConclusionsLF is a multifunctional protein with a broad spectrum of antimicrobial activities. The related field of antibacterial properties of LF will remain a research hot spot in future.
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Affiliation(s)
- Yunling Xu
- Department of Basic Medical, Zhejiang Academy of Traditional Chinese Medicine, Hangzhou, China
| | - Yuji Wang
- Department of Basic Medical, Zhejiang Academy of Traditional Chinese Medicine, Hangzhou, China
| | - Jiaolong He
- Department of Intensive Care, First Affiliated Hospital of Jishou University, Jishou, China
- *Correspondence: Jiaolong He
| | - Wanping Zhu
- Department of Basic Medical, Zhejiang Academy of Traditional Chinese Medicine, Hangzhou, China
- Wanping Zhu
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8
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Lactoferrin as a Human Genome “Guardian”—An Overall Point of View. Int J Mol Sci 2022; 23:ijms23095248. [PMID: 35563638 PMCID: PMC9105968 DOI: 10.3390/ijms23095248] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 05/06/2022] [Accepted: 05/06/2022] [Indexed: 11/22/2022] Open
Abstract
Structural abnormalities causing DNA modifications of the ethene and propanoadducts can lead to mutations and permanent damage to human genetic material. Such changes may cause premature aging and cell degeneration and death as well as severe impairment of tissue and organ function. This may lead to the development of various diseases, including cancer. In response to a damage, cells have developed defense mechanisms aimed at preventing disease and repairing damaged genetic material or diverting it into apoptosis. All of the mechanisms described above are part of the repertoire of action of Lactoferrin—an endogenous protein that contains iron in its structure, which gives it numerous antibacterial, antiviral, antifungal and anticancer properties. The aim of the article is to synthetically present the new and innovative role of lactoferrin in the protection of human genetic material against internal and external damage, described by the modulation mechanisms of the cell cycle at all its levels and the mechanisms of its repair.
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Chéneau C, Eichholz K, Tran TH, Tran TTP, Paris O, Henriquet C, Bajramovic JJ, Pugniere M, Kremer EJ. Lactoferrin Retargets Human Adenoviruses to TLR4 to Induce an Abortive NLRP3-Associated Pyroptotic Response in Human Phagocytes. Front Immunol 2021; 12:685218. [PMID: 34093588 PMCID: PMC8173049 DOI: 10.3389/fimmu.2021.685218] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 05/05/2021] [Indexed: 12/22/2022] Open
Abstract
Despite decades of clinical and preclinical investigations, we still poorly grasp our innate immune response to human adenoviruses (HAdVs) and their vectors. In this study, we explored the impact of lactoferrin on three HAdV types that are being used as vectors for vaccines. Lactoferrin is a secreted globular glycoprotein that influences direct and indirect innate immune response against a range of pathogens following a breach in tissue homeostasis. The mechanism by which lactoferrin complexes increases HAdV uptake and induce maturation of human phagocytes is unknown. We show that lactoferrin redirects HAdV types from species B, C, and D to Toll-like receptor 4 (TLR4) cell surface complexes. TLR4-mediated internalization of the HAdV-lactoferrin complex induced an NLRP3-associated response that consisted of cytokine release and transient disruption of plasma membrane integrity, without causing cell death. These data impact our understanding of HAdV immunogenicity and may provide ways to increase the efficacy of HAdV-based vectors/vaccines.
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Affiliation(s)
- Coraline Chéneau
- Institut de Génétique Moléculaire de Montpellier, Université de Montpellier, CNRS, Montpellier, France
| | - Karsten Eichholz
- Institut de Génétique Moléculaire de Montpellier, Université de Montpellier, CNRS, Montpellier, France
| | - Tuan Hiep Tran
- Institut de Génétique Moléculaire de Montpellier, Université de Montpellier, CNRS, Montpellier, France
| | - Thi Thu Phuong Tran
- Institut de Génétique Moléculaire de Montpellier, Université de Montpellier, CNRS, Montpellier, France
| | - Océane Paris
- Institut de Génétique Moléculaire de Montpellier, Université de Montpellier, CNRS, Montpellier, France
| | - Corinne Henriquet
- Institut de Recherche en Cancérologie de Montpellier, INSERM, Université Montpellier, Institut Régional du Cancer, Montpellier, France
| | | | - Martine Pugniere
- Institut de Recherche en Cancérologie de Montpellier, INSERM, Université Montpellier, Institut Régional du Cancer, Montpellier, France
| | - Eric J Kremer
- Institut de Génétique Moléculaire de Montpellier, Université de Montpellier, CNRS, Montpellier, France
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10
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Amirthalingam S, Lee SS, Rajendran AK, Kim I, Hwang NS, Rangasamy J. Addition of lactoferrin and substance P in a chitin/PLGA-CaSO 4 hydrogel for regeneration of calvarial bone defects. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 126:112172. [PMID: 34082973 DOI: 10.1016/j.msec.2021.112172] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 04/24/2021] [Accepted: 05/03/2021] [Indexed: 11/25/2022]
Abstract
Calcium-based injectable hydrogels with various bioactive active molecules possess a great potential for bone regeneration. Herein, we have synthesized a chitin-PLGA-calcium sulfate hydrogel (CSG) containing bioactive molecules - lactoferrin (LF) and substance P (SP). SEM and XRD analysis revealed that CS crystal growth was altered with the addition of LF. Rheological measurements indicated that the injectability of the hydrogels was maintained after the addition of LF, however, there was a reduction in storage modulus after LF addition. The addition of LF increased stem cell proliferation whereas, SP enhanced the cell migration. Osteogenic gene expression revealed that LF concentration at 25 μg/mg of CSG was optimal for a favourable outcome. To this optimized LF containing CSG, SP was incorporated and 0.05 μg/mg was found to be most effective (CSG-L3S2) in vitro studies. Further, the μ-CT and histological studies confirmed that CSG-L3S2 showed enhanced bone regeneration compared to the controls in critical-sized calvarial defect of mice. Thus the results indicate that a combination of the chemotactic agent (SP), pleiotropic growth protein (LF), and CS in the chitin-PLGA hydrogel could be a promising approach for non-load bearing bone defects.
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Affiliation(s)
- Sivashanmugam Amirthalingam
- Centre for Nanosciences and Molecular Medicine, Amrita Vishwa Vidyapeetham, Kochi-682041, India; School of Chemical and Biological Engineering, the Institute of Chemical Processes, Seoul National University, Seoul, 151-742, Republic of Korea
| | - Seunghun S Lee
- Interdisciplinary Program in Bioengineering, Seoul National University, Seoul, 151-742, Republic of Korea
| | - Arun Kumar Rajendran
- School of Chemical and Biological Engineering, the Institute of Chemical Processes, Seoul National University, Seoul, 151-742, Republic of Korea
| | - Inseon Kim
- Interdisciplinary Program in Bioengineering, Seoul National University, Seoul, 151-742, Republic of Korea
| | - Nathaniel S Hwang
- Interdisciplinary Program in Bioengineering, Seoul National University, Seoul, 151-742, Republic of Korea; School of Chemical and Biological Engineering, the Institute of Chemical Processes, Seoul National University, Seoul, 151-742, Republic of Korea; Bio-MAX Institute, Institute of Bio-Engineering, Seoul National University, Seoul, 151-742, Republic of Korea.
| | - Jayakumar Rangasamy
- Centre for Nanosciences and Molecular Medicine, Amrita Vishwa Vidyapeetham, Kochi-682041, India.
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11
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Quitadamo PA, Comegna L, Cristalli P. Anti-Infective, Anti-Inflammatory, and Immunomodulatory Properties of Breast Milk Factors for the Protection of Infants in the Pandemic From COVID-19. Front Public Health 2021; 8:589736. [PMID: 33738273 PMCID: PMC7960784 DOI: 10.3389/fpubh.2020.589736] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 11/30/2020] [Indexed: 12/12/2022] Open
Abstract
COVID-19 pandemic since the end of 2019 spreads worldwide, counting millions of victims. The viral invasion, systemic inflammation, and consequent organ failure are the gravest features of coronavirus disease 2019 (COVID-19), and they are associated with a high mortality rate. The aim of this study is to evaluate the role of breast milk in the COVID-19 pandemic, analyzing its antiviral, anti-inflammatory, and immunoregulatory effects due to its bioactive components, so numerous and important for the protection of infants. The study tried to demonstrate that all the components of human milk are capable of performing functions on all the pathogenic events recognized and described in COVID-19 disease. Those human milk factors are well-tolerated and practically free of side effects, so breast milk should become a research topic to discover therapies even in this epidemic. In the first part, the mechanisms of protection and defense of the breast milk elements will be delineated; in the second section, it will describe the human milk effects in viral infections and it will be hypothesized how the known mechanisms could act in COVID infection.
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Affiliation(s)
- Pasqua Anna Quitadamo
- NICU “Casa Sollievo della Sofferenza” Foundation, Scientific Research and Care Institute, San Giovanni Rotondo, Italy
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12
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Zlatina K, Galuska SP. The N-glycans of lactoferrin: more than just a sweet decoration. Biochem Cell Biol 2021; 99:117-127. [DOI: 10.1139/bcb-2020-0106] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Nearly all extracellular proteins undergo post-translational modification with sugar chains during their transit through the endoplasmic reticulum and the Golgi apparatus. These “sweet” modifications not only influence the activity of its carrier protein, but they themselves often have bioactivity, independent of the carrier function. Lactoferrin belongs to the group of glycoproteins and is modified with several different N-glycans. This minireview summarizes several studies dealing with the diverse glycosylation patterns of lactoferrin from different origins, and the potential impact of these post-translational modifications on the functionality of lactoferrin. A special emphasis is placed on the differences between human and bovine lactoferrin, because the latter form is often selected for the development of novel therapeutic approaches in humans. For this reason, the potential impact of the bovine-specific glycosylation patterns on the observed heterogeneous effects of lactoferrin in humans is discussed within this minireview.
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Affiliation(s)
- Kristina Zlatina
- Institute of Reproductive Biology, Leibniz Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196 Dummerstorf, Germany
- Institute of Reproductive Biology, Leibniz Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196 Dummerstorf, Germany
| | - Sebastian P. Galuska
- Institute of Reproductive Biology, Leibniz Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196 Dummerstorf, Germany
- Institute of Reproductive Biology, Leibniz Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196 Dummerstorf, Germany
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13
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Noh SH, Jo HS, Choi S, Song HG, Kim HJ, Kim KN, Kim SE, Park K. Lactoferrin-Anchored Tannylated Mesoporous Silica Nanomaterials for Enhanced Osteo-Differentiation Ability. Pharmaceutics 2020; 13:pharmaceutics13010030. [PMID: 33375294 PMCID: PMC7823981 DOI: 10.3390/pharmaceutics13010030] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Revised: 12/23/2020] [Accepted: 12/24/2020] [Indexed: 01/28/2023] Open
Abstract
In the present study, we created lactoferrin-anchored mesoporous silica nanomaterials with absorbed tannic acid (LF/TA-MSNs) and evaluated the effect of these LF/TA-MSNs on the in vitro osteo-differentiation ability of adipose-derived stem cells (ADSCs) by testing alkaline phosphatase (ALP) level, calcium accumulation, and expression of osteo-differentiation-specific genes, including osteocalcin (OCN) and osteopontin (OPN). Both bare MSNs and LF/TA-MSNs exhibited round nano-particle structures. The LF/TA-MSNs demonstrated prolonged LF release for up to 28 days. Treatment of ADSCs with LF (50 μg)/TA-MSNs resulted in markedly higher ALP level and calcium accumulation compared to treatment with LF (10 μg)/TA-MSNs or bare MSNs. Furthermore, LF (50 μg)/TA-MSNs remarkably increased mRNA levels of osteo-differentiation-specific genes, including OCN and OPN, compared to MSNs or LF (10 μg)/TA-MSNs. Together, these data suggest that the ability of LF/TA-MSNs to enhance osteo-differentiation of ADSCs make them a possible nanovehicle for bone healing and bone regeneration in patients with bone defect or disease.
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Affiliation(s)
- Sung Hyun Noh
- Department of Neurosurgery, National Health Insurance Service Ilsan Hospital, #100, Ilsan-ro, Ilsan-donggu, Gyeonggi-do, Goyang-si 10444, Korea;
| | - Han-Saem Jo
- Department of Systems Biotechnology, Chung-Ang University, Gyeonggi-do, Anseong-si 17546, Korea; (H.-S.J.); (H.G.S.)
| | - Somang Choi
- Department of Orthopedic Surgery and Rare Diseases Institute, Korea University Guro Hospital, #148, Gurodong-ro, Guro-gu, Seoul 08308, Korea; (S.C.); (H.-J.K.)
| | - Hee Gyeong Song
- Department of Systems Biotechnology, Chung-Ang University, Gyeonggi-do, Anseong-si 17546, Korea; (H.-S.J.); (H.G.S.)
| | - Hak-Jun Kim
- Department of Orthopedic Surgery and Rare Diseases Institute, Korea University Guro Hospital, #148, Gurodong-ro, Guro-gu, Seoul 08308, Korea; (S.C.); (H.-J.K.)
| | - Keung Nyun Kim
- Department of Neurosurgery, Spine and Spinal Cord Institute, Severance Hospital, Yonsei University College of Medicine, #50, Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea
- Correspondence: (K.N.K.); (S.E.K.); (K.P.); Tel.: +82-2-2228-2161 (K.N.K.); +82-2-2626-1999 (S.E.K.); +82-31-670-3357 (K.P.)
| | - Sung Eun Kim
- Department of Orthopedic Surgery and Rare Diseases Institute, Korea University Guro Hospital, #148, Gurodong-ro, Guro-gu, Seoul 08308, Korea; (S.C.); (H.-J.K.)
- Correspondence: (K.N.K.); (S.E.K.); (K.P.); Tel.: +82-2-2228-2161 (K.N.K.); +82-2-2626-1999 (S.E.K.); +82-31-670-3357 (K.P.)
| | - Kyeongsoon Park
- Department of Systems Biotechnology, Chung-Ang University, Gyeonggi-do, Anseong-si 17546, Korea; (H.-S.J.); (H.G.S.)
- Correspondence: (K.N.K.); (S.E.K.); (K.P.); Tel.: +82-2-2228-2161 (K.N.K.); +82-2-2626-1999 (S.E.K.); +82-31-670-3357 (K.P.)
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14
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Chéneau C, Kremer EJ. Adenovirus-Extracellular Protein Interactions and Their Impact on Innate Immune Responses by Human Mononuclear Phagocytes. Viruses 2020; 12:v12121351. [PMID: 33255892 PMCID: PMC7760109 DOI: 10.3390/v12121351] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 11/23/2020] [Accepted: 11/24/2020] [Indexed: 12/11/2022] Open
Abstract
The aim of this review is to highlight how, in a syngeneic system, human mononuclear phagocytes respond to environments containing human adenovirus (HAdV) and soluble extracellular proteins that influence their innate immune response. Soluble extracellular proteins, including immunoglobulins, blood clotting factors, proteins of the complement system, and/or antimicrobial peptides (AMPs) can exert direct effects by binding to a virus capsid that modifies interactions with pattern recognition receptors and downstream signaling. In addition, the presence, generation, or secretion of extracellular proteins can indirectly influence the response to HAdVs via the activation and recruitment of cells at the site of infection.
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15
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Fujishima H, Okada N, Matsumoto K, Shimizu E, Fukuda S, Tomita M. Conjunctival Injection Reduction in Patients with Atopic Keratoconjunctivitis Due to Synergic Effect of Bovine Enteric-Coated Lactoferrin in 0.1% Tacrolimus Ophthalmic Suspension. J Clin Med 2020; 9:jcm9103093. [PMID: 32992801 PMCID: PMC7599790 DOI: 10.3390/jcm9103093] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 09/11/2020] [Accepted: 09/14/2020] [Indexed: 01/03/2023] Open
Abstract
Lactoferrin (LF), a multifunctional glycoprotein found in mammalian milk, is reported to have immunoregulatory effects. The present study aimed to evaluate whether enteric-coated LF (eLF) could improve symptoms in patients with atopic keratoconjunctivitis (AKC). This randomized double-blind placebo-controlled single-center trial comprised Japanese patients (n = 20; aged 22–60 years) with AKC. Patients treated with 0.1% tacrolimus ophthalmic suspension (TALYMUS®) were administered eLF (400 mg/d of bovine LF) or placebo tablets for 12 weeks. Conjunctival injection was examined, papillae formation in the palpebral conjunctiva was evaluated, and corneal fluorescein score, itchy sensation in end-point itching scale, and serum allergic parameters were assessed. Conjunctival injection was significantly reduced in the LF group than in the placebo group (p = 0.0017, Mann–Whitney U-test). Papillae formation in the palpebral conjunctiva showed a statistical decrease in the LF group than in the placebo group (p = 0.010, unpaired T-test). LF combined with TALYMUS® could be a promising treatment strategy to mitigate AKC.
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Affiliation(s)
- Hiroshi Fujishima
- Department of Ophthalmology, Tsurumi University School of Dental Medicine, Tsurumi, Yokohama 230-8501, Japan;
- Correspondence: ; Tel.: +81-45-580-8599
| | - Naoko Okada
- Department of Ophthalmology, Tsurumi University School of Dental Medicine, Tsurumi, Yokohama 230-8501, Japan;
- Department of Pharmaceutical Sciences, Nihon Pharmaceutical University, Saitama 362-0806, Japan
| | - Kenji Matsumoto
- Department of Allergy and Clinical Immunology, National Research Institute for Child Health and Development, Tokyo 157-8535, Japan;
| | - Eisuke Shimizu
- Department of Ophthalmology, Keio University School of Medicine, Tokyo 160-8582, Japan;
| | - Shinji Fukuda
- Institute for Advanced Biosciences, Keio University, Tsuruoka, Yamagata 997-0052, Japan; (S.F.); (M.T.)
- Intestinal Microbiota Project, Kanagawa Institute of Industrial Science and Technology, Kawasaki 210-0821, Kanagawa, Japan
- Transborder Medical Research Center, University of Tsukuba, Tsukuba 305-8575, Ibaraki, Japan
| | - Masaru Tomita
- Institute for Advanced Biosciences, Keio University, Tsuruoka, Yamagata 997-0052, Japan; (S.F.); (M.T.)
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16
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Ueda K, Shimizu M, Ohashi A, Murata D, Suzuki T, Kobayashi N, Baba J, Takeuchi T, Shiga Y, Nakamura M, Kagaya S, Sato A. Albumin fusion at the N-terminus or C-terminus of human lactoferrin leads to improved pharmacokinetics and anti-proliferative effects on cancer cell lines. Eur J Pharm Sci 2020; 155:105551. [PMID: 32946958 DOI: 10.1016/j.ejps.2020.105551] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 08/23/2020] [Accepted: 09/12/2020] [Indexed: 12/18/2022]
Abstract
Human lactoferrin (hLF), a soluble factor of the innate immune system, exhibits various biological functions and therefore has potential as a therapeutic protein. However, the clinical applications of hLF are limited by its low stability in blood. We therefore attempted to resolve this by producing recombinant hLF fused to human serum albumin (HSA). Two HSA-fused hLFs with different fusion orientations (hLF-HSA and HSA-hLF) were produced in Chinese hamster ovary (CHO) DG44 cells. hLF-HSA revealed higher thermal stability, resistance to peptic degradation, and stability during the process of cellular uptake and release in an intestinal enterocyte model (Caco-2 cells) than HSA-hLF. The lower stability of HSA-hLF is presumably due to the steric hindrance imposed by HSA fusion to the N-terminus of hLF. Both HSA fusion proteins, especially HSA-hLF, displayed improved pharmacokinetic properties despite the lower protein stability of HSA-hLF. hLF-HSA and HSA-hLF exhibited approximately 3.3- and 20.7-fold longer half-lives (64.0 and 403.6 min), respectively, than holo-rhLF (19.5 min). Both HSA fusion proteins were found to exert enhanced growth inhibition effects on cancer cells in vitro, but not normal cells. Their enhanced growth inhibitory activities were considered to be due to the synergetic effects of hLF and HSA because hLF alone or HSA alone failed to exert such an effect. Altogether, Fusion of HSA to hLF yielded superior pharmacokinetics and anti-proliferative activities against cancer cells. HSA-fused hLF is a novel candidate for further application of hLF as biopharmaceuticals for intravenous administration.
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Affiliation(s)
- Keisuke Ueda
- School of Bioscience and Biotechnology, Tokyo University of Technology, 1404-1, Katakura, Hachioji, Tokyo, 192-0982, Japan
| | - Maya Shimizu
- School of Bioscience and Biotechnology, Tokyo University of Technology, 1404-1, Katakura, Hachioji, Tokyo, 192-0982, Japan
| | - Aimi Ohashi
- School of Bioscience and Biotechnology, Tokyo University of Technology, 1404-1, Katakura, Hachioji, Tokyo, 192-0982, Japan
| | - Daisuke Murata
- School of Bioscience and Biotechnology, Tokyo University of Technology, 1404-1, Katakura, Hachioji, Tokyo, 192-0982, Japan
| | - Takuo Suzuki
- Division of Biological Chemistry and Biologicals, National Institute of Health, Sciences, Kawasaki, Kanagawa, 210-9501, Japan
| | - Natsuki Kobayashi
- School of Bioscience and Biotechnology, Tokyo University of Technology, 1404-1, Katakura, Hachioji, Tokyo, 192-0982, Japan
| | - Junpei Baba
- School of Bioscience and Biotechnology, Tokyo University of Technology, 1404-1, Katakura, Hachioji, Tokyo, 192-0982, Japan
| | - Takashi Takeuchi
- Department of Veterinary Medicine, Tottori University, Koyama-Minami, Tottori, 680-8553, Japan
| | - Yuki Shiga
- School of Bioscience and Biotechnology, Tokyo University of Technology, 1404-1, Katakura, Hachioji, Tokyo, 192-0982, Japan
| | - Masao Nakamura
- School of Bioscience and Biotechnology, Tokyo University of Technology, 1404-1, Katakura, Hachioji, Tokyo, 192-0982, Japan
| | - Shinji Kagaya
- NRL Pharma, Inc., Kawasaki, Kanagawa, 213-0012, Japan
| | - Atsushi Sato
- School of Bioscience and Biotechnology, Tokyo University of Technology, 1404-1, Katakura, Hachioji, Tokyo, 192-0982, Japan.
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17
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Berrington JE, McGuire W, Embleton ND. ELFIN, the United Kingdom preterm lactoferrin trial: interpretation and future questions 1. Biochem Cell Biol 2020; 99:1-6. [PMID: 32830532 DOI: 10.1139/bcb-2020-0073] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Results from previous studies have suggested that supplemental bovine lactoferrin (BLF) given to preterm infants (<32 weeks gestation) reduces late-onset sepsis (LOS) and necrotising enterocolitis (NEC). The Enteral Lactoferrin in Neonates (ELFIN) study, performed in the UK, aimed to further address this issue with a well powered double-blind placebo controlled trial of >2200 preterm infants. The results from ELFIN did not demonstrate a reduction in LOS or NEC, or several other clinically important measures. Of the 1093 infants, 316 (29%) in the intervention group developed late-onset sepsis versus 334 (31%) of 1089 in the control group, with an adjusted risk ratio of 0.95 (95% CI = 0.86-1.04; p = 0.233). Reasons for the differences in ELFIN trial results and other studies may include population differences, the routine use of antifungal prophylaxis in the UK, timing of administration of the lactoferrin in relation to disease onset, or specific properties of the lactoferrin used in the different trials. The UK National Institutes for Health Research funded "Mechanisms Affecting the Guts of Preterm Infants in Enteral feeding trials" (MAGPIE) study is further exploring the use of lactoferrin, and the results should be available soon.
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Affiliation(s)
- Janet Elizabeth Berrington
- Newcastle Upon Tyne Hospitals NHS Foundation Trust, and Translational and Clinical Medicine, Newcastle University, Newcastle, UK
| | - William McGuire
- Centre for Reviews and Dissemination, University of York, York YO10 5DD, UK
| | - Nicholas David Embleton
- Newcastle Upon Tyne Hospitals NHS Foundation Trust, and Population Health Sciences, Newcastle University, Newcastle, UK
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18
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Dierick M, Vanrompay D, Devriendt B, Cox E. Lactoferrin, a versatile natural antimicrobial glycoprotein that modulates the host's innate immunity. Biochem Cell Biol 2020; 99:61-65. [PMID: 32585120 DOI: 10.1139/bcb-2020-0080] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Lactoferrin is a multifunctional protein found in the secretions of mammals. The antimicrobial activity of lactoferrin was the first to be discovered and was assumed to be solely dependent on its iron-chelating ability. However, lactoferrin has been reported to display proteolytic activity towards bacterial virulence factors and to modulate the host defence by stimulating the immune system and balancing pathogen-induced inflammation. Here, we review the current understandings of the antimicrobial effect, interaction with host cells, and innate immune modulation of lactoferrin, and put forward this moonlighting protein as a possible alternative for antibiotics.
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Affiliation(s)
- Matthias Dierick
- Laboratory of Immunology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Daisy Vanrompay
- Laboratory for Immunology and Animal Biotechnology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Bert Devriendt
- Laboratory of Immunology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Eric Cox
- Laboratory of Immunology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
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19
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Choi HJ, Choi S, Kim JG, Song MH, Shim KS, Lim YM, Kim HJ, Park K, Kim SE. Enhanced tendon restoration effects of anti-inflammatory, lactoferrin-immobilized, heparin-polymeric nanoparticles in an Achilles tendinitis rat model. Carbohydr Polym 2020; 241:116284. [PMID: 32507170 DOI: 10.1016/j.carbpol.2020.116284] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 04/07/2020] [Accepted: 04/09/2020] [Indexed: 01/04/2023]
Abstract
Gradual wear and tear can cause a local inflammatory response in tendons. The trauma and inflammatory reaction eventually impair the biomechanical properties of the tendon. In this study, we prepared lactoferrin-immobilized, heparin-anchored, poly(lactic-co-glycolic acid) nanoparticles (LF/Hep-PLGA NPs) and evaluated their in vitro anti-inflammatory effects on interleukin-1β (IL-1β)-treated tenocytes and in vivo tendon healing effects in a rat model of Achilles tendinitis. Long-term LF-deliverable NPs (LF/Hep-PLGA NPs) remarkably decreased mRNA levels of pro-inflammatory factors [cyclooxygenase-2 (COX-2), IL-1β, matrix metalloproteinase-3 (MMP-3), MMP-13, IL-6, and tumor necrosis factor-α (TNF-α)] and increased mRNA levels of anti-inflammatory cytokines (IL-4 and IL-10) in both IL-1β-treated tenocytes and the Achilles tendons of a collagenase-induced Achilles tendinitis rat model. Interestingly, anti-inflammatory LF/Hep-PLGA NPs greatly enhanced collagen content, mRNA levels of tenogenic markers [collagen type I (COL1A1), decorin (DCN), tenascin-C (TNC)], and biomechanical properties such as tendon stiffness and tensile strength. These results suggest that anti-inflammatory LF/Hep-PLGA NPs are effective at restoring tendons in Achilles tendinitis.
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Affiliation(s)
- Hong Joon Choi
- Department of Orthopedic Surgery, College of Medicine Korea University, Anam-dong, Seongbuk-gu, Seoul, 02841, Republic of Korea; Yonsei gunwoo Hospital, #1814, Nambusunhwan-ro, Gwanak-gu, Seoul, 08787, Republic of Korea
| | - Somang Choi
- Department of Biomedical Science, College of Medicine Korea University, Anam-dong, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - Jae Gyoon Kim
- Department of Orthopedic Surgery, Korea University, College of Medicine, Korea University Ansan Hospital 123, Jeokgeum-ro, Danwon-gu, Ansan-si, Gyeonggi-do, 15355, Republic of Korea
| | - Mi Hyun Song
- Department of Orthopedic Surgery and Rare Diseases Institute, Korea University Guro Hospital, #80, Guro-dong, Guro-gu, Seoul, 08308, Republic of Korea
| | - Kyu-Sik Shim
- Department of Orthopedic Surgery and Rare Diseases Institute, Korea University Guro Hospital, #80, Guro-dong, Guro-gu, Seoul, 08308, Republic of Korea
| | - Youn-Mook Lim
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, 1266 Sinjeong-dong, Jeongeup-si, Jeollabuk-do, 56212, Republic of Korea
| | - Hak-Jun Kim
- Department of Orthopedic Surgery and Rare Diseases Institute, Korea University Guro Hospital, #80, Guro-dong, Guro-gu, Seoul, 08308, Republic of Korea.
| | - Kyeongsoon Park
- Department of Systems Biotechnology, Chung-Ang University, Anseong, Gyeonggi, 17546, Republic of Korea.
| | - Sung Eun Kim
- Department of Orthopedic Surgery and Rare Diseases Institute, Korea University Guro Hospital, #80, Guro-dong, Guro-gu, Seoul, 08308, Republic of Korea.
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Accelerated Osteogenic Differentiation of MC3T3-E1 Cells by Lactoferrin-Conjugated Nanodiamonds through Enhanced Anti-Oxidant and Anti-Inflammatory Effects. NANOMATERIALS 2019; 10:nano10010050. [PMID: 31878270 PMCID: PMC7022293 DOI: 10.3390/nano10010050] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 12/17/2019] [Accepted: 12/18/2019] [Indexed: 01/16/2023]
Abstract
The purpose of this study was to investigate the effects of lactoferrin (LF)-conjugated nanodiamonds (NDs) in vitro on both anti-oxidant and anti-inflammation activity as well as osteogenic promotion. The application of LF-NDs resulted in sustained release of LF for up to 7 days. In vitro anti-oxidant analyses performed using Dichlorofluorescin diacetate (DCF-DA) assay and cell proliferation studies showed that LF (50 μg)-NDs effectively scavenged the reactive oxygen species (ROS) in MC3T3-E1 cells (osteoblast-like cells) after H2O2 treatment and increased proliferation of cells after H2O2 treatment. Treatment of lipopolysaccharide (LPS)-induced MC3T3-E1 cells with LF-NDs suppressed levels of pro-inflammatory cytokines, including interleukin-1β (IL-1β) and tumor necrosis factor-α (TNF-α). In addition, LF-NDs were associated with outstanding enhancement of osteogenic activity of MC3T3-E1 cells due to increased alkaline phosphatase (ALP) and calcium deposition. Our findings suggest that LF-NDs are an important substrate for alleviating ROS effects and inflammation, as well as promoting osteogenic differentiation of cells.
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Ibrahim HM, Mohammed-Geba K, Tawfic AA, El-Magd MA. Camel milk exosomes modulate cyclophosphamide-induced oxidative stress and immuno-toxicity in rats. Food Funct 2019; 10:7523-7532. [PMID: 31674611 DOI: 10.1039/c9fo01914f] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Camel milk proteins exhibit many beneficial properties including immuno-modulatory and anti-oxidant effects. Recent studies demonstrated that most of these properties are ascribed to the presence of extracellular nanovesicles known as exosomes. Therefore, the current study aimed to investigate the effect of the immuno-modulatory and anti-oxidant properties of camel milk exosomes on the immuno-toxicity and oxidative stress induced by cyclophosphamide (CTX) in albino rats. Exosomes were isolated from camel milk and exosomal kappa casein and lactoferrin mRNAs were detected and then sequenced. CTX was used to induce immunosuppression in rats, which were further treated with camel milk and its exosomes. The alterations in biochemical parameters, antioxidant status, cytokine profile, spleen histopathology and flow cytometric analysis were detected. Treatment with CTX resulted in a significant decrease in total protein, albumin, globulin, catalase (CAT), superoxide dismutase (SOD) and glutathione peroxidase (GPx) levels associated with a significant increase in the levels of malondialdehyde (MDA) when compared with the control group. Moreover, CTX depleted lymphocytes in the spleen tissue, significantly reduced the expression of interferon gamma (IFN-γ) in the spleen cells and decreased the CD4+ and CD8+ cell percentages in the blood and spleen, while it induced a significant increase in the expression of interleukin (IL)-6 and tumor necrosis factor (TNF)-α. Co-administration of camel milk exosomes was able to normalize the antioxidant status and most of the biochemical and immunological parameters. This study clarifies that camel milk and its exosomes successfully ameliorate immunosuppression and oxidative stress induced by CTX in rats.
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Affiliation(s)
- Hany M Ibrahim
- Department of Zoology, Faculty of Science, Menoufia University, Shebin El-Kom, Egypt.
| | - Khaled Mohammed-Geba
- Department of Zoology, Faculty of Science, Menoufia University, Shebin El-Kom, Egypt.
| | - Amr A Tawfic
- Department of Zoology, Faculty of Science, Menoufia University, Shebin El-Kom, Egypt.
| | - Mohammed A El-Magd
- Department of Anatomy and Embryology, Faculty of Veterinary Medicine, Kafrel shiekh University, Egypt.
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Hård A, Nilsson AK, Lund A, Hansen‐Pupp I, Smith LEH, Hellström A. Review shows that donor milk does not promote the growth and development of preterm infants as well as maternal milk. Acta Paediatr 2019; 108:998-1007. [PMID: 30565323 PMCID: PMC6520191 DOI: 10.1111/apa.14702] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Revised: 10/09/2018] [Accepted: 12/12/2018] [Indexed: 12/28/2022]
Abstract
Aim This nonsystematic review examined differences in the composition of raw maternal breastmilk and pasteurised donor milk and possible health effects on preterm infants. Methods We searched PubMed up to July 2018 for studies published in English that focused on four comparisons as follows: raw maternal milk versus donor milk, human milk before and after Holder pasteurisation, milk from mothers who delivered preterm and at term and milk collected during early and late lactation. We also searched for possible effects of the milk components, as well as the effects of maternal and donor milk on preterm infants’ health. Results Raw maternal milk contained factors involved in antioxidant and anti‐inflammatory defence, gut microbiome establishment and the maturation of immune defences, food tolerability and metabolism. Many of these factors were reduced or abolished in processed donor milk. Both maternal milk and donor milk have been associated with a reduced incidence of necrotising enterocolitis. High‐dose feeding with maternal milk during the neonatal period reportedly reduced the risk of other morbidities and promoted growth and neurodevelopment. Conclusion Many of the components in raw maternal breastmilk were lacking in pasteurised donor milk, which was inferior in promoting the growth and development of very preterm infants.
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Affiliation(s)
- Anna‐Lena Hård
- Department of Ophthalmology Institute of Neuroscience and Physiology Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
| | - Anders K. Nilsson
- Department of Ophthalmology Institute of Neuroscience and Physiology Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
| | - Anna‐My Lund
- Department of Pediatrics Institute of Clinical Sciences Lund Lund University and Skane University Hospital Lund Sweden
| | - Ingrid Hansen‐Pupp
- Department of Pediatrics Institute of Clinical Sciences Lund Lund University and Skane University Hospital Lund Sweden
| | - Lois E. H. Smith
- Department of Ophthalmology Boston Children's Hospital Harvard Medical School Boston MA USA
| | - Ann Hellström
- Department of Ophthalmology Institute of Neuroscience and Physiology Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
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Orchestration of Adaptive T Cell Responses by Neutrophil Granule Contents. Mediators Inflamm 2019; 2019:8968943. [PMID: 30983883 PMCID: PMC6431490 DOI: 10.1155/2019/8968943] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 01/28/2019] [Accepted: 02/06/2019] [Indexed: 01/05/2023] Open
Abstract
Neutrophils are the most abundant leukocytes in peripheral blood and respond rapidly to danger, infiltrating tissues within minutes of infectious or sterile injury. Neutrophils were long thought of as simple killers, but now we recognise them as responsive cells able to adapt to inflammation and orchestrate subsequent events with some sophistication. Here, we discuss how these rapid responders release mediators which influence later adaptive T cell immunity through influences on DC priming and directly on the T cells themselves. We consider how the release of granule contents by neutrophils—through NETosis or degranulation—is one way in which the innate immune system directs the phenotype of the adaptive immune response.
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Anghel L, Radulescu A, Erhan RV. Structural aspects of human lactoferrin in the iron-binding process studied by molecular dynamics and small-angle neutron scattering. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2018; 41:109. [PMID: 30229350 DOI: 10.1140/epje/i2018-11720-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 08/28/2018] [Indexed: 06/08/2023]
Abstract
Lactoferrin is a non-heme protein known for its ability to bind tightly Fe(III) ions in various physiological environments. Due to this feature lactoferrin plays an important role in the processes of iron regulation at the cellular level preventing the body from damages produced by high levels of free iron ions. The X-ray crystal structure of human lactoferrin shows that the iron-binding process leads to conformational changes within the protein structure. The present study was addressed to conformation stability of human lactoferrin in solution. Using molecular dynamics simulations, it was shown that Arg121 is the key amino acid in the stabilization of the Fe(III) ion in the N-lobe of human lactoferrin. The small-angle neutron scattering method allowed us to detect the structural differences between the open and closed conformation of human lactoferrin in solution. Our results indicate that the radius of gyration of apolactoferrin appears to be smaller than that of the hololactoferrin, [Formula: see text] Å and [Formula: see text] Å, respectively. The low-resolution three-dimensional models computed for both forms of human lactoferrin in solution also show visible differences, both having a more compact conformation compared to the high-resolution structure.
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Affiliation(s)
- Lilia Anghel
- Institute of Chemistry (ICh), Academiei 3, MD-2028, Chisinau, Republic of Moldova
| | - Aurel Radulescu
- Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ), Forschungszentrum Jülich GmbH, Lichtenbergstraße 1, 85748, Garching, Germany
| | - Raul Victor Erhan
- Neutron materials characterization (NØYTRON), Institute for Energy Technology (IFE), Instituttveien 18, P.O. Box 40, 2027, Kjeller, Norway.
- Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH), Reactorului 30, P.O. Box MG-6, Bucharest - Magurele, Romania.
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Telang S. Lactoferrin: A Critical Player in Neonatal Host Defense. Nutrients 2018; 10:nu10091228. [PMID: 30181493 PMCID: PMC6165050 DOI: 10.3390/nu10091228] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 08/30/2018] [Accepted: 08/30/2018] [Indexed: 12/15/2022] Open
Abstract
Newborn infants are at a high risk for infection due to an under-developed immune system, and human milk has been shown to exhibit substantial anti-infective properties that serve to bolster neonatal defenses against multiple infections. Lactoferrin is the dominant whey protein in human milk and has been demonstrated to perform a wide array of antimicrobial and immunomodulatory functions and play a critical role in protecting the newborn infant from infection. This review summarizes data describing the structure and important functions performed by lactoferrin in protecting the neonate from infection and contributing to the maturation of the newborn innate and adaptive immune systems. We also briefly discuss clinical trials examining the utility of lactoferrin supplementation in the prevention of sepsis and necrotizing enterocolitis in newborn infants. The data reviewed provide rationale for the continuation of studies to examine the effects of lactoferrin administration on the prevention of sepsis in the neonate.
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Affiliation(s)
- Sucheta Telang
- Division of Neonatology, Department of Pediatrics, University of Louisville, Louisville, KY 40202, USA.
- Division of Hematology/Oncology, Department of Medicine, James Graham Brown Cancer Center, University of Louisville, Louisville, KY 40202, USA.
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26
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Alexander MR, Norlander AE, Elijovich F, Atreya RV, Gaye A, Gnecco JS, Laffer CL, Galindo CL, Madhur MS. Human monocyte transcriptional profiling identifies IL-18 receptor accessory protein and lactoferrin as novel immune targets in hypertension. Br J Pharmacol 2018; 176:2015-2027. [PMID: 29774543 DOI: 10.1111/bph.14364] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Revised: 03/30/2018] [Accepted: 04/30/2018] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND AND PURPOSE Monocytes play a critical role in hypertension. The purpose of our study was to use an unbiased approach to determine whether hypertensive individuals on conventional therapy exhibit an altered monocyte gene expression profile and to perform validation studies of selected genes to identify novel therapeutic targets for hypertension. EXPERIMENTAL APPROACH Next generation RNA sequencing identified differentially expressed genes in a small discovery cohort of normotensive and hypertensive individuals. Several of these genes were further investigated for association with hypertension in multiple validation cohorts using qRT-PCR, regression analysis, phenome-wide association study and case-control analysis of a missense polymorphism. KEY RESULTS We identified 60 genes that were significantly differentially expressed in hypertensive monocytes, many of which are related to IL-1β. Uni- and multivariate regression analyses of the expression of these genes with mean arterial pressure (MAP) revealed four genes that significantly correlated with MAP in normotensive and/or hypertensive individuals. Of these, lactoferrin (LTF), peptidoglycan recognition protein 1 and IL-18 receptor accessory protein (IL18RAP) remained significantly elevated in peripheral monocytes of hypertensive individuals in a separate validation cohort. Interestingly, IL18RAP expression associated with MAP in a cohort of African Americans. Furthermore, homozygosity for a missense single nucleotide polymorphism in LTF that decreases antimicrobial function and increases protein levels (rs1126478) was over-represented in patients with hypertension relative to controls (odds ratio 1.16). CONCLUSIONS AND IMPLICATIONS These data demonstrate that monocytes exhibit enhanced pro-inflammatory gene expression in hypertensive individuals and identify IL18RAP and LTF as potential novel mediators of human hypertension. LINKED ARTICLES This article is part of a themed section on Immune Targets in Hypertension. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v176.12/issuetoc.
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Affiliation(s)
- Matthew R Alexander
- Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Allison E Norlander
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN, USA
| | - Fernando Elijovich
- Division of Clinical Pharmacology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Ravi V Atreya
- Department of Biomedical Informatics, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Amadou Gaye
- Metabolic, Cardiovascular and Inflammatory Disease Genomics Branch, National Human Genome Research Institute, Bethesda, MD, USA
| | - Juan S Gnecco
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University, Nashville, TN, USA
| | - Cheryl L Laffer
- Division of Clinical Pharmacology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Cristi L Galindo
- Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Meena S Madhur
- Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, TN, USA.,Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN, USA.,Division of Clinical Pharmacology, Vanderbilt University Medical Center, Nashville, TN, USA
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27
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Multifunctional capacity and therapeutic potential of lactoferrin. Life Sci 2018; 195:61-64. [DOI: 10.1016/j.lfs.2018.01.002] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 12/30/2017] [Accepted: 01/03/2018] [Indexed: 01/06/2023]
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28
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Lactoferrin-induced growth factors and cytokines expression profile in pre-osteoblast MC3T3-E1 cell and LRP1 stable knockdown MC3T3-E1 cell. J Funct Foods 2017. [DOI: 10.1016/j.jff.2017.07.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
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29
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Benefits of Lactoferrin, Osteopontin and Milk Fat Globule Membranes for Infants. Nutrients 2017; 9:nu9080817. [PMID: 28788066 PMCID: PMC5579611 DOI: 10.3390/nu9080817] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 07/23/2017] [Accepted: 07/24/2017] [Indexed: 12/11/2022] Open
Abstract
The provision of essential and non-essential amino acids for breast-fed infants is the major function of milk proteins. In addition, breast-fed infants might benefit from bioactivities of milk proteins, which are exhibited in the intestine during the digestive phase and by absorption of intact proteins or derived peptides. For lactoferrin, osteopontin and milk fat globule membrane proteins/lipids, which have not until recently been included in substantial amounts in infant formulas, in vitro experiments and animal models provide a convincing base of evidence for bioactivities, which contribute to the protection of the infant from pathogens, improve nutrient absorption, support the development of the immune system and provide components for optimal neurodevelopment. Technologies have become available to obtain these compounds from cow´s milk and the bovine compounds also exhibit bioactivities in humans. Randomized clinical trials with experimental infant formulas incorporating lactoferrin, osteopontin, or milk fat globule membranes have already provided some evidence for clinical benefits. This review aims to compare findings from laboratory and animal experiments with outcomes of clinical studies. There is good justification from basic science and there are promising results from clinical studies for beneficial effects of lactoferrin, osteopontin and the milk fat globule membrane complex of proteins and lipids. Further studies should ideally be adequately powered to investigate effects on clinically relevant endpoints in healthy term infants.
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30
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Shi P, Wang Q, Yu C, Fan F, Liu M, Tu M, Lu W, Du M. Hydroxyapatite nanorod and microsphere functionalized with bioactive lactoferrin as a new biomaterial for enhancement bone regeneration. Colloids Surf B Biointerfaces 2017; 155:477-486. [DOI: 10.1016/j.colsurfb.2017.04.042] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 04/15/2017] [Accepted: 04/19/2017] [Indexed: 11/25/2022]
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31
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Hu L, Hu X, Long K, Gao C, Dong HL, Zhong Q, Gao XM, Gong FY. Extraordinarily potent proinflammatory properties of lactoferrin-containing immunocomplexes against human monocytes and macrophages. Sci Rep 2017; 7:4230. [PMID: 28652573 PMCID: PMC5484712 DOI: 10.1038/s41598-017-04275-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Accepted: 05/14/2017] [Indexed: 12/25/2022] Open
Abstract
Lactoferrin (LTF), an important first line defense molecule against infection, is a common target for humoral autoimmune reactions in humans. Since LTF is a multifunctional protein capable of activating innate immune cells via various surface receptors, we hypothesized that LTF-containing immune complexes (ICs) (LTF-ICs), likely formed in patients with high titer anti-LTF autoantibodies, could possess unique monocyte/macrophage-activating properties compared with other ICs. ELISA analysis on serum samples from rheumatoid arthritis (RA) patients (n = 80) and healthy controls (n = 35) for anti-LTF autoantibodies confirmed a positive correlation between circulating LTF-specific IgG and RA. ICs between human LTF and LTF-specific IgG purified from patient sera or immunized rabbits and mice, but not control ICs, LTF or Abs alone, elicited strong production of TNF-α and IL-1β by freshly fractionated human peripheral blood monocytes and monocytes-derived macrophages. Furthermore, LTF-ICs utilized both membrane-anchored CD14 and CD32a (FcγRIIa) to trigger monocyte activation in an internalization-, Toll-like receptor (TLR)4- and TLR9-dependent manner, and also that LTF-IC-induced cytokine production was blocked by specific inhibitors of caspase-1, NF-κB and MAPK. These results uncover a possible pathway for LTF-ICs perpetuating local inflammation and contributing to the pathogenesis of autoimmune diseases by triggering activation of infiltrating monocytes or tissue macrophages in vivo.
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Affiliation(s)
- Lulu Hu
- Institute of Biology and Medical Sciences, School of Biology and Basic Medical Sciences, Soochow University, Suzhou, China
| | - Xiaomin Hu
- Institute of Biology and Medical Sciences, School of Biology and Basic Medical Sciences, Soochow University, Suzhou, China
| | - Kai Long
- Department of Immunology, Peking University Health Science Center, Beijing, China.,Department of Physiology, Jiujiang College, Jiangxi Province, China
| | - Chenhui Gao
- Institute of Biology and Medical Sciences, School of Biology and Basic Medical Sciences, Soochow University, Suzhou, China
| | - Hong-Liang Dong
- Institute of Biology and Medical Sciences, School of Biology and Basic Medical Sciences, Soochow University, Suzhou, China
| | - Qiao Zhong
- Institute of Biology and Medical Sciences, School of Biology and Basic Medical Sciences, Soochow University, Suzhou, China
| | - Xiao-Ming Gao
- Institute of Biology and Medical Sciences, School of Biology and Basic Medical Sciences, Soochow University, Suzhou, China.
| | - Fang-Yuan Gong
- Institute of Biology and Medical Sciences, School of Biology and Basic Medical Sciences, Soochow University, Suzhou, China.
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Breedveld A, Groot Kormelink T, van Egmond M, de Jong EC. Granulocytes as modulators of dendritic cell function. J Leukoc Biol 2017. [DOI: 10.1189/jlb.4mr0217-048rr] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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33
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Horie K, Watanabe M, Chanbora C, Awada T, Kunimatsu R, Uchida T, Takata T, Tanimoto K. Bovine lactoferrin reduces extra-territorial facial allodynia/hyperalgesia following a trigeminal nerve injury in the rat. Brain Res 2017; 1669:89-96. [PMID: 28465227 DOI: 10.1016/j.brainres.2017.04.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 04/20/2017] [Accepted: 04/21/2017] [Indexed: 01/03/2023]
Abstract
There is an urgent clinical need for an effective therapeutic agent to treat neuropathic pain. This study explored whether intrathecal administration of bovine lactoferrin (bLF), in combination with signal transduction pathway inhibition or an inflammatory cytokine production, results in reduced allodynia/hyperalgesia in the whisker pad area following mental nerve transection (MNT) in rats. Rats were intrathecally infused with bLF, lipopolysaccharide from Rhodobacter sphaeroides (LPS-RS), an antagonist of Toll-like receptor 4 (TLR4), or interleukin (IL)-18 binding protein (BP). bLF attenuated allodynia/hyperalgesia and blocked upregulation of phosphorylated (p)-p38 mitogen-activated protein kinase (MAPK), p-nuclear factor (NF)-κB p65, p-IκB kinase, and IL-18 in the trigeminal subnucleus caudalis (Vc). Microglia expressed p-p38 and astrocytes expressed p-NF-κB p65 in the Vc following MNT. LPS-RS had the same effects as bLF, except for attenuation of p-NF-κB p65. IL-18BP attenuated allodynia/hyperalgesia and IL-18 upregulation in the Vc. These results suggest that bLF suppresses IL-18 production, which is involved in allodynia/hyperalgesia following MNT, by inhibiting TLR4-derived p38 MAPK activation in microglia. Additionally, binding of bLF to tumor necrosis factor receptor-associated factor 6 might result in inhibition of p38 MAPK and NF-κB activation. The findings suggest that bLF could serve as a potent therapeutic agent for neuropathic pain.
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Affiliation(s)
- Kayo Horie
- Department of Orthodontics, Applied Life Sciences, Hiroshima University, Institute of Biomedical & Health Sciences, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| | - Mineo Watanabe
- Department of Oral Biology, Basic Life Sciences, Hiroshima University, Institute of Biomedical & Health Sciences, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan.
| | - Chea Chanbora
- Department of Oral and Maxillofacial Pathobiology, Basic Life Sciences, Hiroshima University, Institute of Biomedical & Health Sciences, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| | - Tetsuya Awada
- Department of Orthodontics, Applied Life Sciences, Hiroshima University, Institute of Biomedical & Health Sciences, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| | - Ryo Kunimatsu
- Department of Orthodontics, Applied Life Sciences, Hiroshima University, Institute of Biomedical & Health Sciences, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| | - Takashi Uchida
- Department of Oral Biology, Basic Life Sciences, Hiroshima University, Institute of Biomedical & Health Sciences, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| | - Takashi Takata
- Department of Oral and Maxillofacial Pathobiology, Basic Life Sciences, Hiroshima University, Institute of Biomedical & Health Sciences, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| | - Kotaro Tanimoto
- Department of Orthodontics, Applied Life Sciences, Hiroshima University, Institute of Biomedical & Health Sciences, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
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Takayama Y, Aoki R, Uchida R, Tajima A, Aoki-Yoshida A. Role of CXC chemokine receptor type 4 as a lactoferrin receptor. Biochem Cell Biol 2016; 95:57-63. [PMID: 28075616 DOI: 10.1139/bcb-2016-0039] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Lactoferrin exerts its biological activities by interacting with receptors on target cells, including LDL receptor-related protein-1 (LRP-1/CD91), intelectin-1 (omentin-1), and Toll-like receptor 4 (TLR4). However, the effects mediated by these receptors are not sufficient to fully explain the many functions of lactoferrin. C-X-C-motif cytokine receptor 4 (CXCR4) is a ubiquitously expressed G-protein coupled receptor for stromal cell-derived factor-1 (SDF-1/CXCL12). Lactoferrin was found to be as capable as SDF-1 in blocking infection by an HIV variant that uses CXCR4 as a co-receptor (X4-tropic HIV), suggesting that lactoferrin interacts with CXCR4. We addressed whether CXCR4 acts as a lactoferrin receptor using HaCaT human keratinocytes and Caco-2 human intestinal cells. We found that bovine lactoferrin interacted with CXCR4-containing lipoparticles, and that this interaction was not antagonized by SDF-1. In addition, activation of Akt in response to lactoferrin was abrogated by AMD3100, a small molecule inhibitor of CXCR4, or by a CXCR4-neutralizing antibody, suggesting that CXCR4 functions as a lactoferrin receptor able to mediate activation of the PI3K-Akt signaling pathway. Lactoferrin stimulation mimicked many aspects of SDF-1-induced CXCR4 activity, including receptor dimerization, tyrosine phosphorylation, and ubiquitination. Cycloheximide chase assays indicated that turnover of CXCR4 was accelerated in response to lactoferrin. These results indicate that CXCR4 is a potent lactoferrin receptor that mediates lactoferrin-induced activation of Akt signaling.
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Affiliation(s)
- Yoshiharu Takayama
- a Functional Biomolecules Research Group, National Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization (NARO), 2 Ikenodai, Tsukuba, Ibaraki 305-0901, Japan
| | - Reiji Aoki
- a Functional Biomolecules Research Group, National Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization (NARO), 2 Ikenodai, Tsukuba, Ibaraki 305-0901, Japan
| | - Ryo Uchida
- a Functional Biomolecules Research Group, National Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization (NARO), 2 Ikenodai, Tsukuba, Ibaraki 305-0901, Japan.,b Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - Atsushi Tajima
- b Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - Ayako Aoki-Yoshida
- a Functional Biomolecules Research Group, National Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization (NARO), 2 Ikenodai, Tsukuba, Ibaraki 305-0901, Japan.,c Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
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Kim SE, Lee DW, Yun YP, Shim KS, Jeon DI, Rhee JK, Kim HJ, Park K. Heparin-immobilized hydroxyapatite nanoparticles as a lactoferrin delivery system for improving osteogenic differentiation of adipose-derived stem cells. Biomed Mater 2016; 11:025004. [DOI: 10.1088/1748-6041/11/2/025004] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Lievense L, Aerts J, Hegmans J. Immune Therapy. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 893:59-90. [PMID: 26667339 DOI: 10.1007/978-3-319-24223-1_4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Lung cancer has long been considered an unsuitable target for immunotherapy due to its proposed immunoresistant properties. However, recent evidence has shown that anti-tumor immune responses can occur in lung cancer patients, paving the way for lung cancer as a novel target for immunotherapy. In order to take full advantage of the potential of immunotherapy, research is focusing on the presence and function of various immunological cell types in the tumor microenvironment. Immune cells which facilitate or inhibit antitumor responses have been identified and their prognostic value in lung cancer has been established. Knowledge regarding these pro- and anti-tumor immune cells and their mechanisms of action has facilitated the identification of numerous potential immunotherapeutic strategies and opportunities for intervention. A plethora of immunotherapeutic approaches is currently being developed and studied in lung cancer patients and phase 3 clinical trials are ongoing. Many different immunotherapies have shown promising clinical effects in patients with limited and advanced stage lung cancer, however, future years will have to tell whether immunotherapy will earn its place in the standard treatment of lung cancer.
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Affiliation(s)
- Lysanne Lievense
- Department of Pulmonary Medicine, Erasmus MC Cancer Institute, Dr. Molewaterplein 50, Rotterdam, 3015 GD, The Netherlands
| | - Joachim Aerts
- Department of Pulmonary Medicine, Erasmus MC Cancer Institute, Dr. Molewaterplein 50, Rotterdam, 3015 GD, The Netherlands
| | - Joost Hegmans
- Department of Pulmonary Medicine, Erasmus MC Cancer Institute, Dr. Molewaterplein 50, Rotterdam, 3015 GD, The Netherlands.
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Lemjabbar-Alaoui H, Hassan OU, Yang YW, Buchanan P. Lung cancer: Biology and treatment options. BIOCHIMICA ET BIOPHYSICA ACTA 2015; 1856:189-210. [PMID: 26297204 PMCID: PMC4663145 DOI: 10.1016/j.bbcan.2015.08.002] [Citation(s) in RCA: 436] [Impact Index Per Article: 48.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2015] [Revised: 07/30/2015] [Accepted: 08/16/2015] [Indexed: 12/25/2022]
Abstract
Lung cancer remains the leading cause of cancer mortality in men and women in the U.S. and worldwide. About 90% of lung cancer cases are caused by smoking and the use of tobacco products. However, other factors such as radon gas, asbestos, air pollution exposures, and chronic infections can contribute to lung carcinogenesis. In addition, multiple inherited and acquired mechanisms of susceptibility to lung cancer have been proposed. Lung cancer is divided into two broad histologic classes, which grow and spread differently: small-cell lung carcinomas (SCLCs) and non-small cell lung carcinomas (NSCLCs). Treatment options for lung cancer include surgery, radiation therapy, chemotherapy, and targeted therapy. Therapeutic-modalities recommendations depend on several factors, including the type and stage of cancer. Despite the improvements in diagnosis and therapy made during the past 25 years, the prognosis for patients with lung cancer is still unsatisfactory. The responses to current standard therapies are poor except for the most localized cancers. However, a better understanding of the biology pertinent to these challenging malignancies, might lead to the development of more efficacious and perhaps more specific drugs. The purpose of this review is to summarize the recent developments in lung cancer biology and its therapeutic strategies, and discuss the latest treatment advances including therapies currently under clinical investigation.
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Affiliation(s)
- Hassan Lemjabbar-Alaoui
- Department of Surgery, Thoracic Oncology Division, University of CA, San Francisco 94143, USA
| | - Omer Ui Hassan
- Department of Surgery, Thoracic Oncology Division, University of CA, San Francisco 94143, USA
| | - Yi-Wei Yang
- Department of Surgery, Thoracic Oncology Division, University of CA, San Francisco 94143, USA
| | - Petra Buchanan
- Department of Surgery, Thoracic Oncology Division, University of CA, San Francisco 94143, USA
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Talactoferrin in Severe Sepsis: Results From the Phase II/III Oral tAlactoferrin in Severe sepsIS Trial. Crit Care Med 2015; 43:1832-8. [PMID: 26010687 DOI: 10.1097/ccm.0000000000001090] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE Talactoferrin alfa is a recombinant form of the human glycoprotein, lactoferrin, which has been shown to have a wide range of effects on the immune system. This phase II/III clinical trial compared talactoferrin with placebo, in addition to standard of care, in patients with severe sepsis. DESIGN Multicenter, randomized, placebo-controlled, phase II/III clinical study. SETTING Seventy-seven centers in 10 countries. PATIENTS Adult (> 18 yr) patients admitted to one of the participating centers with severe sepsis who were receiving antimicrobial therapy and able to take liquid medication by mouth or feeding tube. INTERVENTIONS Patients were randomized to receive either talactoferrin (1.5 g, 15 mL) or placebo three times a day orally or by another enteral route for 28 days or until ICU discharge. MEASUREMENTS AND MAIN RESULTS The study was terminated after 305 patients had been enrolled (153 talactoferrin and 152 placebo) because of futility and safety concerns identified by the Data Safety Monitoring Board. There were no significant differences between groups in baseline characteristics including age, sex, site of infection, and severity scores. Twenty-eight-day mortality was higher in talactoferrin-treated patients although this difference was not statistically significant (24.8% vs 17.8% placebo; p = 0.117). The difference was largely the result of differences in patients with shock (talactoferrin, 33/105 [31.4%] vs placebo, 21/104 [20.2%]; p = 0.064); no mortality difference was seen in patients without shock (talactoferrin, 5/48 [10.4%] vs placebo, 6/48 [12.5%]; p = 0.806). In-hospital (43/153 [28.1%] vs 27/152 [17.8%]; p = 0.037) and 3-month (46/153 [30.1%] vs 31/152 [20.4%]; p = 0.036) mortality rates were significantly higher in talactoferrin-treated patients than in patients in the placebo group. The occurrence of treatment-related adverse or serious adverse events was similar between groups. CONCLUSIONS Administration of oral talactoferrin was not associated with reduced 28-day mortality in patients with severe sepsis and may even be harmful.
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Modulatory Effects of Oral Bovine Lactoferrin on the IgA Response at Inductor and Effector Sites of Distal Small Intestine from BALB/c Mice. Arch Immunol Ther Exp (Warsz) 2015; 64:57-63. [PMID: 26318768 DOI: 10.1007/s00005-015-0358-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Accepted: 05/29/2015] [Indexed: 02/07/2023]
Abstract
Bovine lactoferrin (bLf) up-modulates intestinal IgA that is essential for homeostasis and which might confer protection to the distal small intestine that is vulnerable to inflammation. This study analyzed the effects of bLf administered orally on the IgA response at inductive (Peyer's patches) and effector (lamina propria) sites of the distal small intestine in mice. Groups of five healthy male BALB/c mice were orally treated with 5 mg of bLf for 7, 14, 21, or 28 days. Then, mice were killed and the distal small intestine was dissected. Intestinal fluid samples were analyzed to determine IgA and IgM levels by enzyme-immuno assay. Peyer's patches and lamina propria were analyzed for IgA(+) or IgM(+) plasma cells, B, CD4(+) T and CD8(+) T cells as well as CD4(+) T cells positive for either pro-inflammatory cytokines [tumor necrosis factor (TNF)-α, interferon-γ and interleukin (IL)-12] or for IgA-producing ILs (IL-4, -5, -10 and -6) by cytofluorometry. Antibodies, antibody-secreting cells, and B and T responses in both Peyer's patches and lamina propria were higher in bLf-treated than bLf-untreated mice. The generation of IL-10 and IL-6 CD4(+) T cells in Peyer's patches or TNF-α and IL-12 CD4(+) T cells in lamina propria showed similar response patterns. On days 14 and 28, cytokine/IL CD4(+) T cell responses were increased in Peyer's patches or decreased in lamina propria. The effect of bLf on the elicitation of IgA indicates a potential application of bLf as a nutraceutical to control inflammation in the distal small intestine.
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Hwang SA, Kruzel ML, Actor JK. CHO expressed recombinant human lactoferrin as an adjuvant for BCG. Int J Immunopathol Pharmacol 2015; 28:452-68. [PMID: 26315722 DOI: 10.1177/0394632015599832] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Accepted: 07/15/2015] [Indexed: 01/31/2023] Open
Abstract
Lactoferrin (LF), an iron binding protein with immune modulatory activities, has adjuvant activity to enhance vaccine efficacy. Tuberculosis (TB) is a pulmonary disease caused by the pathogen Mycobacterium tuberculosis (MTB). Progressive TB disease is clinically defined by damaging pulmonary pathology, a result of inflammation due to immune reactivity. The current vaccine for TB, an attenuated strain of Mycobacterium bovis, Bacillus Calmette Guerin (BCG), has only limited efficacy to prevent adult pulmonary TB. This study examines a Chinese hamster ovary (CHO) expressed recombinant human LF (rHLF) to boost efficacy of the BCG vaccine and delay early pathology post infectious challenge. C57BL/6 mice were immunized with BCG, or BCG admixed with either rHLF or bovine LF (bLF; internal control), or remained unvaccinated. Mice were then aerosol challenged with Erdman MTB. All vaccinated mice demonstrated decreased organ bacterial load up to 19 weeks post infection compared with non-vaccinated controls. Furthermore, mice receiving bLF or rHLF supplemented BCG vaccines showed a modest decrease in lung pathology developed over time, compared to the BCG vaccine alone. While mice vaccinated with BCG/rHLF demonstrated increased general lung inflammation at day 7, it occurred without noticeable increase in pro-inflammatory cytokines. At later times, decreased pathology in the rHLF groups correlated with decreased inflammatory cytokines. Splenic recall to BCG antigens showed BCG/rHLF vaccination increased production of IFN-γ, IL-6, and GM-CSF compared to naïve, BCG, and BCG/bLF groups. Analysis of T cell stimulating functions of bone marrow derived macrophages and dendritic cells treated with BCG/bLF or BCG/rHLF showed decreases in IL-10 production when co-cultured with sensitized CD4 and CD8 T cells, compared to those cultured with macrophages/dendritic cells treated with BCG without LF. These results indicate that addition of rHLF to the BCG vaccine can modulate development of host pathology early post infectious challenge, most likely through host immune regulation affecting hypersensitive responses.
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Affiliation(s)
- Shen-An Hwang
- Department of Pathology, Medical School, University of Texas-Houston Medical School, Houston, TX, USA
| | - Marian L Kruzel
- Department of Integrative Biology and Pharmacology, University of Texas-Houston Medical School, Houston, TX, USA
| | - Jeffrey K Actor
- Department of Pathology, Medical School, University of Texas-Houston Medical School, Houston, TX, USA
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Filkor K, Németh T, Nagy I, Kondorosi É, Urbán E, Kemény L, Szolnoky G. The expression of inflammatory cytokines, TAM tyrosine kinase receptors and their ligands is upregulated in venous leg ulcer patients: a novel insight into chronic wound immunity. Int Wound J 2015; 13:554-62. [PMID: 26192232 DOI: 10.1111/iwj.12473] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Revised: 05/28/2015] [Accepted: 06/04/2015] [Indexed: 12/26/2022] Open
Abstract
The systemic host defence mechanisms, especially innate immunity, in venous leg ulcer patients are poorly investigated. The aim of the current study was to measure Candida albicans killing activity and gene expressions of pro- and anti-inflammatory cytokines and innate immune response regulators, TAM receptors and ligands of peripheral blood mononuclear cells separated from 69 venous leg ulcer patients and 42 control probands. Leg ulcer patients were stratified into responder and non-responder groups on the basis of wound healing properties. No statistical differences were found in Candida killing among controls, responders and non-responders. Circulating blood mononuclear cells of patients overexpress pro-inflammatory (IL-1α, TNFα, CXCL-8) and anti-inflammatory (IL-10) cytokines as well as TAM receptors (Tyro, Axl, MerTK) and their ligands Gas6 and Protein S compared with those of control individuals. IL-1α is notably overexpressed in venous leg ulcer treatment non-responders; in contrast, Axl gene expression is robustly stronger among responders. These markers may be considered as candidates for the prediction of treatment response among venous leg ulcer patients.
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Affiliation(s)
- Kata Filkor
- Institute of Biochemistry, Biological Research Centre of the Hungarian Academy of Sciences, Szeged, Hungary
| | - Tibor Németh
- Department of Microbiology, University of Szeged, Szeged, Hungary
| | - István Nagy
- Institute of Biochemistry, Biological Research Centre of the Hungarian Academy of Sciences, Szeged, Hungary
| | - Éva Kondorosi
- Institute of Biochemistry, Biological Research Centre of the Hungarian Academy of Sciences, Szeged, Hungary
| | - Edit Urbán
- Institute of Clinical Microbiology and Diagnostics, University of Szeged, Szeged, Hungary
| | - Lajos Kemény
- Department of Dermatology and Allergology, University of Szeged, Szeged, Hungary.,Dermatological Research Group of the Hungarian Academy of Sciences, University of Szeged, Szeged, Hungary
| | - Győző Szolnoky
- Department of Dermatology and Allergology, University of Szeged, Szeged, Hungary
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Makkar S, Rath NC, Packialakshmi B, Huff WE, Huff GR. Nutritional effects of egg shell membrane supplements on chicken performance and immunity. Poult Sci 2015; 94:1184-9. [PMID: 25840966 DOI: 10.3382/ps/pev098] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/04/2015] [Indexed: 12/26/2022] Open
Abstract
Eggshell membranes (ESM) contain a variety of proteins and peptides which help in the development of embryo and provide protection to it. Many of the peptides and proteins associated with ESM have antimicrobial, immune-modulatory, and adjuvant properties. We hypothesized that the membrane byproducts from egg, provided as posthatch nutritional supplements to chickens, may improve their performance and immunity. To explore its effect, we fed 3 groups of broiler chicks with feed containing 0, 0.2, and 0.4% ESM from d 1 posthatch through 14 d and regular feed thereafter. The birds were individually weighed at the onset of the study and at weekly intervals until the termination at third wk when they were bled and euthanized. The relative weights of liver, spleen, bursa, and heart, hematology profiles, and clinical chemistry variables including serum IgM, IgG, and corticosterone concentrations were measured. The chickens in the ESM treated groups showed a statistically significant increase in BW with no impact on relative organ weights. Compared with controls, the WBC and lymphocyte percentage increased in chickens fed 0.4% ESM whereas the monocyte percentage decreased at both levels of ESM. Except for the serum protein which increased in ESM fed birds no other metabolic clinical chemistry variables showed any significant change. Both IgM and IgG(Y) levels were elevated and corticosterone levels reduced in chickens fed ESM supplemented diets. Our results suggest that ESM supplements during the early phases of growth may improve immunity and stress variables, and enhance their growth performance without any detrimental effect on other physiological parameters.
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Affiliation(s)
- S Makkar
- Department of Poultry Science, University of Arkansas, Fayetteville, AR 72701
| | - N C Rath
- USDA/Agricultural Research Service, University of Arkansas, Fayetteville, AR 72701
| | - B Packialakshmi
- Poultry Science Center, Cell and Molecular Biology Program, University of Arkansas, Fayetteville, AR
| | - W E Huff
- USDA/Agricultural Research Service, University of Arkansas, Fayetteville, AR 72701
| | - G R Huff
- USDA/Agricultural Research Service, University of Arkansas, Fayetteville, AR 72701
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Aerts JG, Lievense LA, Hoogsteden HC, Hegmans JP. Immunotherapy prospects in the treatment of lung cancer and mesothelioma. Transl Lung Cancer Res 2015; 3:34-45. [PMID: 25806279 DOI: 10.3978/j.issn.2218-6751.2013.11.04] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Accepted: 11/25/2013] [Indexed: 12/18/2022]
Abstract
A very recent finding is the role of immune activation in cancer. The assumption that stimulating the patient's immune system to attack tumors is a valuable treatment option in malignant diseases has gained more acceptance. However the high immunosuppressive effects caused by the tumor limits this beneficial effect. There is a delicate balance between immunoactivation and immunosuppression in a patient. Especially in non small cell lung cancer (NSCLC), the role of immunosuppressive cells hampering immune activation is high. But also in small cell lung cancer (SCLC) and mesothelioma immunosuppressive activity is high. This is suggested to be related to the type of tumor, advanced stage of the disease, and the tumor load. In this review, we provide an overview of the progress and challenges in the immunotherapeutic approaches in lung cancer. We conclude with the concept that immunotherapy in thoracic malignancies must be tailored made to the balance of the immune system.
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Affiliation(s)
- Joachim G Aerts
- 1 Department of Pulmonary Medicine, Erasmus MC Cancer Institute, Rotterdam, The Netherlands ; 2 Department of Pulmonary Diseases, Amphia Hospital Breda, The Netherlands
| | - Lysanne A Lievense
- 1 Department of Pulmonary Medicine, Erasmus MC Cancer Institute, Rotterdam, The Netherlands ; 2 Department of Pulmonary Diseases, Amphia Hospital Breda, The Netherlands
| | - Henk C Hoogsteden
- 1 Department of Pulmonary Medicine, Erasmus MC Cancer Institute, Rotterdam, The Netherlands ; 2 Department of Pulmonary Diseases, Amphia Hospital Breda, The Netherlands
| | - Joost P Hegmans
- 1 Department of Pulmonary Medicine, Erasmus MC Cancer Institute, Rotterdam, The Netherlands ; 2 Department of Pulmonary Diseases, Amphia Hospital Breda, The Netherlands
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Shiga Y, Oshima Y, Kojima Y, Sugimoto A, Tamaki N, Murata D, Takeuchi T, Sato A. Recombinant human lactoferrin-Fc fusion with an improved plasma half-life. Eur J Pharm Sci 2015; 67:136-143. [DOI: 10.1016/j.ejps.2014.11.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Revised: 10/11/2014] [Accepted: 11/12/2014] [Indexed: 12/30/2022]
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Hwang SA, Kruzel ML, Actor JK. Effects of CHO-expressed recombinant lactoferrins on mouse dendritic cell presentation and function. Innate Immun 2014; 21:553-61. [PMID: 25537452 DOI: 10.1177/1753425914564609] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Accepted: 11/15/2014] [Indexed: 12/11/2022] Open
Abstract
Lactoferrin (LF), a natural iron-binding protein, has previously demonstrated effectiveness in enhancing the Bacillus Calmette-Guérin (BCG) tuberculosis vaccine. This report investigates immune modulatory effects of Chinese hamster ovary (CHO) cell-expressed recombinant mouse and human LFs on mouse bone marrow-derived dendritic cells (BMDCs), comparing homologous and heterologous functions. BCG-infected BMDCs were cultured with LF, and examined for class II presentation molecule expression. Culturing of BCG-infected BMDCs with either LF decreased the class II molecule-expressing population. Mouse LF significantly increased the production of IL-12p40, IL-1β and IL-10, while human LF-treated BMDCs increased only IL-1β and IL-10. Overlaying naïve CD4 T-cells onto BCG-infected BMDCs cultured with mouse LF increased IFN-γ, whereas the human LF-exposed group increased IFN-γ and IL-17 from CD4 T cells. Overlay of naïve CD8 T cells onto BCG-infected BMDCs treated with mouse LF increased the production of IFN-γ and IL-17, while similar experiments using human LF only increased IL-17. This report is the first to examine mouse and human recombinant LFs in parallel experiments to assess murine DC function. These results detail the efficacy of the human LF counterpart used in a heterologous system to understand LF-mediated events that confer BCG efficacy against Mycobacterium tuberculosis challenge.
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Affiliation(s)
- Shen-An Hwang
- Department of Pathology, University of Texas-Houston Medical School, Houston, TX, USA
| | - Marian L Kruzel
- Department of Integrative Biology and Pharmacology, University of Texas-Houston Medical School, Houston, TX, USA
| | - Jeffrey K Actor
- Department of Pathology, University of Texas-Houston Medical School, Houston, TX, USA Program in Immunology, University of Texas Health Science Center, Houston, TX, USA
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Abstract
OBJECTIVES Lactoferrin (Lf) is an iron-binding glycoprotein present in high concentration in human milk. It is a pleiotropic protein and is involved in diverse bioactivities, such as stimulation of cell proliferation and differentiation, immune competence, antimicrobial activities, anti-infection, and anticancer activities. Lf has been shown to be partly resistant to proteolysis in the gastrointestinal tract and may thus play important roles in the intestine and liver during infancy. Talactoferrin alfa (TLf) is a recombinant human Lf shown to protect against sepsis and necrotizing enterocolitis as well as cancer. Because bovine Lf (bLf) and human Lf have different amino acid composition and all 3 Lfs differ in glycosylation, they may have different functions/potency. The objective of the present study was to investigate and compare bioactivities of TLf and Lfs from human and bovine milk and thus to provide a better understanding of the bioactivities of different forms of Lf and their potential applications. METHODS In the present study, Caco-2 and C3A cells were used as intestine and liver models to evaluate internalization of Lfs by intestine and liver cells, effects of Lfs on cell proliferation and differentiation, growth of enteropathogenic Escherichia coli (EPEC), chemokine (C-C motif) ligand 20 (CCL20) secretion, and transforming growth factor (TGF)-β1 expression. In addition, HT-29 cells were used as a colon cancer cell model to examine the effects of Lfs on apoptosis. RESULTS All Lfs significantly enhanced cell proliferation and differentiation, apoptosis, CCL20 secretion, and TGF-β1 expression. They also markedly suppressed growth of EPEC. Compared with bLf, TLf showed stronger effects on suppression of EPEC growth and enhancement of TGF-β1 secretion, whereas bLf exhibited more potent effects on cell differentiation, apoptosis, and CCL20 secretion. CONCLUSIONS Our results demonstrate that TLf has several bioactivities similar to human Lf and bLf from milk and may play critical roles in immune and intestinal development in infants as well as having anti-cancer activities in adults. TLf and bLf may be used for different applications owing to their various potencies. TLf may preferentially be used for anti-bacterial applications, whereas bLf may be used for cancer therapy because it exhibits stronger effects on CCL20 secretion, cell differentiation, and apoptosis.
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Generation of bi-transgenic pigs overexpressing human lactoferrin and lysozyme in milk. Transgenic Res 2014; 24:365-73. [PMID: 25236863 DOI: 10.1007/s11248-014-9835-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Accepted: 09/06/2014] [Indexed: 10/24/2022]
Abstract
Intensive swine production industry uses antibiotics to treat diseases and improve pig growth. This can not only cause antibiotic resistance, but can also pollute the environment or eventually affect human public health. To date, human lactoferrin (hLF) and human lysozyme (hLZ) have been known as non-adaptive but interactive antimicrobial members and could act in concert against bacteria, which contribute to host defense. Therefore, their expression in pigs might be an alternative strategy for replacing antibiotics in the pig production industry. In our study, we produced hLF and hLZ bi-transgenic pigs and assessed the milk's antibacterial ability. Integration of both transgenes was confirmed by PCR and southern blot. Both the hLF and hLZ were expressed in the mammary gland of bi-transgenic pigs, as detected by western blotting. The expression amounts were 6.5 g/L for hLF and 1.1 mg/L for hLZ using ELISA. Interestingly, pig milk containing hLF and hLZ had synergistic antimicrobial activity. Our results suggest an alternative approach for avoiding the use of antibiotics in the pig industry, which would be of great benefit to the commercial swine production.
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Rolfo C, Sortino G, Smits E, Passiglia F, Bronte G, Castiglia M, Russo A, Santos ES, Janssens A, Pauwels P, Raez L. Immunotherapy: is a minor god yet in the pantheon of treatments for lung cancer? Expert Rev Anticancer Ther 2014; 14:1173-87. [PMID: 25148289 DOI: 10.1586/14737140.2014.952287] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Immunotherapy has been studied for many years in lung cancer without significant results, making the majority of oncologists quite skeptical about its possible application for non-small cell lung cancer treatment. However, the recent knowledge about immune escape and subsequent 'cancer immunoediting' has yielded the development of new strategies of cancer immunotherapy, heralding a new era of lung cancer treatment. Cancer vaccines, including both whole-cell and peptide vaccines have been tested both in early and advanced stages of non-small cell lung cancer. New immunomodulatory agents, including anti-CTLA4, anti-PD1/PDL1 monoclonal antibodies, have been investigated as monotherapy in metastatic lung cancer. To date, these treatments have shown impressive results of efficacy and tolerability in early clinical trials, leading to testing in several large, randomized Phase III trials. As these results will be confirmed, these drugs will be available in the near future, offering new exciting therapeutic options for lung cancer treatment.
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Affiliation(s)
- Christian Rolfo
- Oncology Department, Phase I - Early Clinical Trials Unit, Antwerp University Hospital, Wilrijkstraat 10, 2650 Edegem, Belgium
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Kim SE, Yun YP, Shim KS, Park K, Choi SW, Suh DH. Effect of lactoferrin-impregnated porous poly(lactide-co-glycolide) (PLGA) microspheres on osteogenic differentiation of rabbit adipose-derived stem cells (rADSCs). Colloids Surf B Biointerfaces 2014; 122:457-464. [PMID: 25096719 DOI: 10.1016/j.colsurfb.2014.06.057] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 06/20/2014] [Accepted: 06/24/2014] [Indexed: 12/24/2022]
Abstract
The aim of this study was to develop lactoferrin (LF)-impregnated porous poly(lactide-co-glycolide) (PLGA) microspheres (PMs) to induce osteogenic differentiation of rabbit adipose-derived stem cells (rADSCs). Porous PLGA PMs were fabricated by a fluidic device and their surfaces were modified with heparin-dopamine (Hep-DOPA). Then, LF (100μg, 500μg, and 1000μg) was impregnated on the surface of heparinized PMs (Hep-PMs) via electrostatic interactions to yield LF-impregnated PMs. PMs and modified PMs were characterized by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). Osteogenic differentiation of rADSCs on PMs and modified PMs was demonstrated by alkaline phosphatase (ALP) activity, calcium deposition, and mRNA expression of osteocalcin and osteopontin. Successful immobilization of Hep-DOPA and LF on the surface of PMs was confirmed by XPS analysis. LF-impregnated PMs generated significantly greater ALP activity, calcium deposition, and mRNA expression of osteocalcin and osteopontin compared with PMs. These results suggested that LF-impregnated PMs effectively induced osteogenic differentiation of rADSCs.
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Affiliation(s)
- Sung Eun Kim
- Department of Orthopedic Surgery and Rare Diseases Institute, Korea University Medical College, Guro Hospital, #80, Guro-dong, Guro-gu, Seoul 152-703, Republic of Korea
| | - Young-Pil Yun
- Department of Orthopedic Surgery and Rare Diseases Institute, Korea University Medical College, Guro Hospital, #80, Guro-dong, Guro-gu, Seoul 152-703, Republic of Korea
| | - Kyu-Sik Shim
- Department of Biomedical Science, College of Medicine, Korea University, Anam-dong, Seongbuk-gu 136-701, Republic of Korea
| | - Kyeongsoon Park
- Division of Bio-imaging, Chuncheon Center, Korea Basic Science Institute, 192-1 Hyoja 2-dong, Chuncheon, Gangwon-do 200-701, Republic of Korea
| | - Sung-Wook Choi
- Department of Biotechnology, The Catholic University of Korea, 43 Jibong-ro Wonmi-gu, Bucheon-si, Gyeonggi-do 420-743, Republic of Korea
| | - Dong Hun Suh
- Department of Orthopedic Surgery, Korea University Medical College, Ansan Hospital, Gojan 1-dong, Danwon-gu, Gyeonggi-do 425-707, Republic of Korea.
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Siqueiros-Cendón T, Arévalo-Gallegos S, Iglesias-Figueroa BF, García-Montoya IA, Salazar-Martínez J, Rascón-Cruz Q. Immunomodulatory effects of lactoferrin. Acta Pharmacol Sin 2014; 35:557-66. [PMID: 24786230 DOI: 10.1038/aps.2013.200] [Citation(s) in RCA: 188] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Accepted: 12/23/2013] [Indexed: 01/13/2023] Open
Abstract
Lactoferrin (Lf) is an iron-binding glycoprotein of the transferrin family, which is expressed in most biological fluids with particularly high levels in mammalian milk. Its multiple activities lie in its capacity to bind iron and to interact with the molecular and cellular components of hosts and pathogens. Lf can bind and sequester lipopolysaccharides, thus preventing pro-inflammatory pathway activation, sepsis and tissue damages. Lf is also considered a cell-secreted mediator that bridges the innate and adaptive immune responses. In the recent years much has been learned about the mechanisms by which Lf exerts its activities. This review summarizes the recent advances in understanding the mechanisms underlying the multifunctional roles of Lf, and provides a future perspective on its potential prophylactic and therapeutic applications.
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