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Dyrda-Terniuk T, Pomastowski P. Impact of Ultrafiltration on the Physicochemical Properties of Bovine Lactoferrin: Insights into Molecular Mass, Surface Morphology, and Elemental Composition. J Dairy Sci 2024:S0022-0302(24)01048-8. [PMID: 39098494 DOI: 10.3168/jds.2024-24933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Accepted: 07/10/2024] [Indexed: 08/06/2024]
Abstract
The large-scale isolation of bovine lactoferrin (bLF) typically involves using large amounts of concentrated eluents, which might introduce impurities to the final product. Sometimes, protein pre-concentration is required for the greater accuracy of experimental results. In this research, the supplied bLF sample was subjected to additional ultrafiltration (UF) to eliminate possible small impurities, such as salts and peptides of bLF. Beforehand, the basic characterization of native bLF, including surface-charge properties and the structural sensitivity to the various pH conditions, was performed. The study aimed to evaluate the difference in molecular mass, primary structure, surface morphology, and elemental composition of the protein before and after UF. The research was provided by application of spectroscopic, spectrometric, electrophoretic, and microscopic techniques. The evident changes in the surface morphology of bLF were observed after UF, while the molecular masses of both proteins were comparable. According to MALDI-TOF/MS results, UF had a positive impact on the bLF sample representation, improving the identification parameters, such as sequence coverage and intensity coverage.
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Affiliation(s)
- Tetiana Dyrda-Terniuk
- Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University in Toruń, Wileńska 4, 87-100 Toruń, Poland.
| | - Paweł Pomastowski
- Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University in Toruń, Wileńska 4, 87-100 Toruń, Poland
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2
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Dyrda-Terniuk T, Pomastowski P. The Multifaceted Roles of Bovine Lactoferrin: Molecular Structure, Isolation Methods, Analytical Characteristics, and Biological Properties. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:20500-20531. [PMID: 38091520 PMCID: PMC10755757 DOI: 10.1021/acs.jafc.3c06887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 11/22/2023] [Accepted: 11/27/2023] [Indexed: 12/28/2023]
Abstract
Bovine lactoferrin (bLF) is widely known as an iron-binding glycoprotein from the transferrin family. The bLF molecule exhibits a broad spectrum of biological activity, including iron delivery, antimicrobial, antiviral, immunomodulatory, antioxidant, antitumor, and prebiotic functions, thereby making it one of the most valuable representatives for biomedical applications. Remarkably, LF functionality might completely differ in dependence on the iron saturation state and glycosylation patterns. Recently, a violently growing demand for bLF production has been observed, mostly for infant formulas, dietary supplements, and functional food formulations. Unfortunately, one of the reasons that inhibit the development of the bLF market and widespread protein implementation is related to its negligible amount in both major sources─colostrum and mature milk. This study provides a comprehensive overview of the significance of bLF research by delineating the key structural characteristics of the protein and elucidating their impact on its physicochemical and biological properties. Progress in the development of optimal isolation techniques for bLF is critically assessed, alongside the challenges that arise during its production. Furthermore, this paper presents a curated list of the most relevant instrumental techniques for the characterization of bLF. Lastly, it discusses the prospective applications and future directions for bLF-based formulations, highlighting their potential in various fields.
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Affiliation(s)
- Tetiana Dyrda-Terniuk
- Centre for Modern Interdisciplinary
Technologies, Nicolaus Copernicus University
in Toruń, Wileńska 4, 87-100 Toruń, Poland
| | - Paweł Pomastowski
- Centre for Modern Interdisciplinary
Technologies, Nicolaus Copernicus University
in Toruń, Wileńska 4, 87-100 Toruń, Poland
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3
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Alves NS, Azevedo AS, Dias BM, Horbach IS, Setatino BP, Denani CB, Schwarcz WD, Lima SMB, Missailidis S, Ano Bom APD, Silva AMV, Barreto Vieira DF, Silva MAN, Barros CA, Carvalho CAM, Gonçalves RB. Inhibition of SARS-CoV-2 Infection in Vero Cells by Bovine Lactoferrin under Different Iron-Saturation States. Pharmaceuticals (Basel) 2023; 16:1352. [PMID: 37895823 PMCID: PMC10609673 DOI: 10.3390/ph16101352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 08/18/2023] [Accepted: 08/24/2023] [Indexed: 10/29/2023] Open
Abstract
Despite the rapid mass vaccination against COVID-19, the emergence of new SARS-CoV-2 variants of concern, such as omicron, is still a great distress, and new therapeutic options are needed. Bovine lactoferrin (bLf), a multifunctional iron-binding glycoprotein available in unsaturated (apo-bLf) and saturated (holo-bLf) forms, has been shown to exert broad-spectrum antiviral activity against many viruses. In this study, we evaluated the efficacy of both forms of bLf at 1 mg/mL against infection of Vero cells by SARS-CoV-2. As assessed with antiviral assays, an equivalent significant reduction in virus infection by about 70% was observed when either form of bLf was present throughout the infection procedure with the SARS-CoV-2 ancestral or omicron strain. This inhibitory effect seemed to be concentrated during the early steps of virus infection, since a significant reduction in its efficiency by about 60% was observed when apo- or holo-bLf were incubated with the cells before or during virus addition, with no significant difference between the antiviral effects of the distinct iron-saturation states of the protein. However, an ultrastructural analysis of bLf treatment during the early steps of virus infection revealed that holo-bLf was somewhat more effective than apo-bLf in inhibiting virus entry. Together, these data suggest that bLf mainly acts in the early events of SARS-CoV-2 infection and is effective against the ancestral virus as well as its omicron variant. Considering that there are no effective treatments to COVID-19 with tolerable toxicity yet, bLf shows up as a promising candidate.
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Affiliation(s)
- Nathalia S. Alves
- Instituto de Tecnologia em Imunobiológicos, Fundação Oswaldo Cruz, Rio de Janeiro 21040-900, RJ, Brazil; (N.S.A.); (A.S.A.); (B.M.D.); (I.S.H.); (B.P.S.); (C.B.D.); (W.D.S.); (S.M.B.L.); (S.M.); (A.P.D.A.B.); (A.M.V.S.)
| | - Adriana S. Azevedo
- Instituto de Tecnologia em Imunobiológicos, Fundação Oswaldo Cruz, Rio de Janeiro 21040-900, RJ, Brazil; (N.S.A.); (A.S.A.); (B.M.D.); (I.S.H.); (B.P.S.); (C.B.D.); (W.D.S.); (S.M.B.L.); (S.M.); (A.P.D.A.B.); (A.M.V.S.)
| | - Brenda M. Dias
- Instituto de Tecnologia em Imunobiológicos, Fundação Oswaldo Cruz, Rio de Janeiro 21040-900, RJ, Brazil; (N.S.A.); (A.S.A.); (B.M.D.); (I.S.H.); (B.P.S.); (C.B.D.); (W.D.S.); (S.M.B.L.); (S.M.); (A.P.D.A.B.); (A.M.V.S.)
| | - Ingrid S. Horbach
- Instituto de Tecnologia em Imunobiológicos, Fundação Oswaldo Cruz, Rio de Janeiro 21040-900, RJ, Brazil; (N.S.A.); (A.S.A.); (B.M.D.); (I.S.H.); (B.P.S.); (C.B.D.); (W.D.S.); (S.M.B.L.); (S.M.); (A.P.D.A.B.); (A.M.V.S.)
| | - Bruno P. Setatino
- Instituto de Tecnologia em Imunobiológicos, Fundação Oswaldo Cruz, Rio de Janeiro 21040-900, RJ, Brazil; (N.S.A.); (A.S.A.); (B.M.D.); (I.S.H.); (B.P.S.); (C.B.D.); (W.D.S.); (S.M.B.L.); (S.M.); (A.P.D.A.B.); (A.M.V.S.)
| | - Caio B. Denani
- Instituto de Tecnologia em Imunobiológicos, Fundação Oswaldo Cruz, Rio de Janeiro 21040-900, RJ, Brazil; (N.S.A.); (A.S.A.); (B.M.D.); (I.S.H.); (B.P.S.); (C.B.D.); (W.D.S.); (S.M.B.L.); (S.M.); (A.P.D.A.B.); (A.M.V.S.)
| | - Waleska D. Schwarcz
- Instituto de Tecnologia em Imunobiológicos, Fundação Oswaldo Cruz, Rio de Janeiro 21040-900, RJ, Brazil; (N.S.A.); (A.S.A.); (B.M.D.); (I.S.H.); (B.P.S.); (C.B.D.); (W.D.S.); (S.M.B.L.); (S.M.); (A.P.D.A.B.); (A.M.V.S.)
| | - Sheila Maria B. Lima
- Instituto de Tecnologia em Imunobiológicos, Fundação Oswaldo Cruz, Rio de Janeiro 21040-900, RJ, Brazil; (N.S.A.); (A.S.A.); (B.M.D.); (I.S.H.); (B.P.S.); (C.B.D.); (W.D.S.); (S.M.B.L.); (S.M.); (A.P.D.A.B.); (A.M.V.S.)
| | - Sotiris Missailidis
- Instituto de Tecnologia em Imunobiológicos, Fundação Oswaldo Cruz, Rio de Janeiro 21040-900, RJ, Brazil; (N.S.A.); (A.S.A.); (B.M.D.); (I.S.H.); (B.P.S.); (C.B.D.); (W.D.S.); (S.M.B.L.); (S.M.); (A.P.D.A.B.); (A.M.V.S.)
| | - Ana Paula D. Ano Bom
- Instituto de Tecnologia em Imunobiológicos, Fundação Oswaldo Cruz, Rio de Janeiro 21040-900, RJ, Brazil; (N.S.A.); (A.S.A.); (B.M.D.); (I.S.H.); (B.P.S.); (C.B.D.); (W.D.S.); (S.M.B.L.); (S.M.); (A.P.D.A.B.); (A.M.V.S.)
| | - Andréa M. V. Silva
- Instituto de Tecnologia em Imunobiológicos, Fundação Oswaldo Cruz, Rio de Janeiro 21040-900, RJ, Brazil; (N.S.A.); (A.S.A.); (B.M.D.); (I.S.H.); (B.P.S.); (C.B.D.); (W.D.S.); (S.M.B.L.); (S.M.); (A.P.D.A.B.); (A.M.V.S.)
| | - Débora F. Barreto Vieira
- Laboratório de Morfologia e Morfogênese Viral, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro 21040-900, RJ, Brazil; (D.F.B.V.); (M.A.N.S.)
| | - Marcos Alexandre N. Silva
- Laboratório de Morfologia e Morfogênese Viral, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro 21040-900, RJ, Brazil; (D.F.B.V.); (M.A.N.S.)
| | - Caroline A. Barros
- Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil;
- Instituto Federal de Educação, Ciência e Tecnologia do Rio de Janeiro, Rio de Janeiro 20270-021, RJ, Brazil
| | - Carlos Alberto M. Carvalho
- Departamento de Patologia, Centro de Ciências Biológicas e da Saúde, Universidade do Estado do Pará, Belém 66095-662, PA, Brazil
| | - Rafael B. Gonçalves
- Departamento de Bioquímica, Instituto Biomédico, Universidade Federal do Estado do Rio de Janeiro, Rio de Janeiro 20211-040, RJ, Brazil;
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Earnhardt EY, Tipper JL, D’Mello A, Jian MY, Conway ES, Mobley JA, Orihuela CJ, Tettelin H, Harrod KS. Influenza A-induced cystic fibrosis transmembrane conductance regulator dysfunction increases susceptibility to Streptococcus pneumoniae. JCI Insight 2023; 8:e170022. [PMID: 37318849 PMCID: PMC10443798 DOI: 10.1172/jci.insight.170022] [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: 02/24/2023] [Accepted: 06/13/2023] [Indexed: 06/17/2023] Open
Abstract
Influenza A virus (IAV) infection is commonly complicated by secondary bacterial infections that lead to increased morbidity and mortality. Our recent work demonstrates that IAV disrupts airway homeostasis, leading to airway pathophysiology resembling cystic fibrosis disease through diminished cystic fibrosis transmembrane conductance regulator (CFTR) function. Here, we use human airway organotypic cultures to investigate how IAV alters the airway microenvironment to increase susceptibility to secondary infection with Streptococcus pneumoniae (Spn). We observed that IAV-induced CFTR dysfunction and airway surface liquid acidification is central to increasing susceptibility to Spn. Additionally, we observed that IAV induced profound transcriptional changes in the airway epithelium and proteomic changes in the airway surface liquid in both CFTR-dependent and -independent manners. These changes correspond to multiple diminished host defense pathways and altered airway epithelial function. Collectively, these findings highlight both the importance of CFTR function during infectious challenge and demonstrate a central role for the lung epithelium in secondary bacterial infections following IAV.
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Affiliation(s)
- Erin Y. Earnhardt
- Department of Anesthesiology and Perioperative Medicine, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Jennifer L. Tipper
- Department of Anesthesiology and Perioperative Medicine, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Adonis D’Mello
- Department of Microbiology and Immunology, Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Ming-Yuan Jian
- Department of Anesthesiology and Perioperative Medicine, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Elijah S. Conway
- Department of Anesthesiology and Perioperative Medicine, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - James A. Mobley
- Department of Anesthesiology and Perioperative Medicine, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Carlos J. Orihuela
- Department of Microbiology, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Hervé Tettelin
- Department of Microbiology and Immunology, Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Kevin S. Harrod
- Department of Anesthesiology and Perioperative Medicine, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
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5
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He S, Qin H, Guan L, Liu K, Hong B, Zhang X, Lou F, Li M, Lin W, Chen Y, He C, Liu F, Lu S, Luo S, Zhu S, An X, Song L, Fan H, Tong Y. Bovine lactoferrin inhibits SARS-CoV-2 and SARS-CoV-1 by targeting the RdRp complex and alleviates viral infection in the hamster model. J Med Virol 2023; 95:e28281. [PMID: 36329614 PMCID: PMC9878033 DOI: 10.1002/jmv.28281] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 10/13/2022] [Accepted: 10/26/2022] [Indexed: 11/06/2022]
Abstract
Breast milk has been found to inhibit coronavirus infection, while the key components and mechanisms are unknown. We aimed to determine the components that contribute to the antiviral effects of breastmilk and explore their potential mechanism. Lactoferrin (Lf) and milk fat globule membrane inhibit severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)-related coronavirus GX_P2V and transcription- and replication-competent SARS-CoV-2 virus-like particles in vitro and block viral entry into cells. We confirmed that bovine Lf (bLf) blocked the binding between human angiotensin-converting enzyme 2 and SARS-CoV-2 spike protein by combining receptor-binding domain (RBD). Importantly, bLf inhibited RNA-dependent RNA polymerase (RdRp) activity of both SARS-CoV-2 and SARS-CoV in vitro in the nanomolar range. So far, no biological macromolecules have been reported to inhibit coronavirus RdRp. Our result indicated that bLf plays a major role in inhibiting viral replication. bLf treatment reduced viral load in lungs and tracheae and alleviated pathological damage. Our study provides evidence that bLf prevents SARS-CoV-2 infection by combining SARS-CoV-2 spike protein RBD and inhibiting coronaviruses' RdRp activity, and may be a promising candidate for the treatment of coronavirus disease 2019.
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Affiliation(s)
- Shi‐ting He
- College of Life Science and TechnologyBeijing University of Chemical TechnologyBeijingChina
| | - Hongbo Qin
- College of Life Science and TechnologyBeijing University of Chemical TechnologyBeijingChina
| | - Lin Guan
- College of Life Science and TechnologyBeijing University of Chemical TechnologyBeijingChina
| | - Ke Liu
- College of Life Science and TechnologyBeijing University of Chemical TechnologyBeijingChina
| | - Bixia Hong
- College of Life Science and TechnologyBeijing University of Chemical TechnologyBeijingChina
| | - Xiaoxu Zhang
- Beijing Advanced Innovation Center for Soft Matter Science and EngineeringBeijing University of Chemical TechnologyBeijingChina
| | - Fuxing Lou
- College of Life Science and TechnologyBeijing University of Chemical TechnologyBeijingChina
| | - Maochen Li
- College of Life Science and TechnologyBeijing University of Chemical TechnologyBeijingChina
| | - Wei Lin
- College of Life Science and TechnologyBeijing University of Chemical TechnologyBeijingChina
| | - Yangzhen Chen
- College of Life Science and TechnologyBeijing University of Chemical TechnologyBeijingChina
| | - Chengzhi He
- Beijing Advanced Innovation Center for Soft Matter Science and EngineeringBeijing University of Chemical TechnologyBeijingChina
| | - Feitong Liu
- H&H Group, H&H ResearchChina Research and InnovationGuangzhouChina
| | - Shanshan Lu
- College of Life Science and TechnologyBeijing University of Chemical TechnologyBeijingChina
| | - Shengdong Luo
- The Fifth Medical CenterChinese PLA People's Liberation Army General HospitalBeijingChina
| | - Shaozhou Zhu
- College of Life Science and TechnologyBeijing University of Chemical TechnologyBeijingChina
| | - Xiaoping An
- College of Life Science and TechnologyBeijing University of Chemical TechnologyBeijingChina
| | - Lihua Song
- College of Life Science and TechnologyBeijing University of Chemical TechnologyBeijingChina
| | - Huahao Fan
- College of Life Science and TechnologyBeijing University of Chemical TechnologyBeijingChina
| | - Yigang Tong
- College of Life Science and TechnologyBeijing University of Chemical TechnologyBeijingChina
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FU J, YANG L, TAN D, LIU L. Iron transport mechanism of lactoferrin and its application in food processing. FOOD SCIENCE AND TECHNOLOGY 2023. [DOI: 10.1590/fst.121122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
| | - Liu YANG
- Shenyang Agricultural University, China
| | | | - Ling LIU
- Shenyang Agricultural University, China
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7
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Wang X, Zu X, Wang T, Zhao Y, Liang Y, Wang X, Chai Q, Zhang Y, Chen H, Wang H. N, S-Doped Carbon Dots Prepared by Peanut Protein Isolates and Cysteamine as Highly Sensitive Fluorescent Sensors for Fe 2+, Fe 3+ and Lactoferrin. Polymers (Basel) 2022; 15:polym15010216. [PMID: 36616565 PMCID: PMC9823515 DOI: 10.3390/polym15010216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 12/21/2022] [Accepted: 12/26/2022] [Indexed: 01/03/2023] Open
Abstract
Lactoferrin (LF) is an iron-binding glycoprotein with various biological activities that has been extensively used in food and medical applications. Several methods for detecting LF have been reported, but they still face challenges in terms of sensitivity and simplicity of detection. To achieve an accurate and efficient detection of LF, we developed a method for the determination of LF in lactoferrin supplements using carbon dots (CDs) fluorescent probes. The N, S-doped PPI carbon dots (N, S-PPI-CDs) were prepared using a protein (peanut protein isolate) and cysteamine as precursors. The prepared N, S-PPI-CDs exhibited intense blue fluorescence and good biocompatibility, while the fluorescence intensity of the N, S-PPI-CDs showed a good linear relationship with Fe2+/Fe3+ concentration (0-2 μM). The N, S-PPI-CDs exhibited a high potential ability to rapidly detect Fe2+/Fe3+ within 30 s, with a limit of detection (LoD) of 0.21 μM/0.17 μM. Due to the reversible binding of LF to Fe, the N, S-PPI-CDs showed a high sensitivity and selectivity for LF, with a limit of detection (LoD) of 1.92 μg/mL. In addition, LF was quantified in real sample LF supplements and showed a fluctuation in recovery of less than 2.48%, further demonstrating the effectiveness of the fluorescent N, S-PPI-CDs sensor.
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Affiliation(s)
- Xinxin Wang
- State Key Laboratory of Biobased Material and Green Papermaking, School of Food Sciences and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Xinyu Zu
- State Key Laboratory of Biobased Material and Green Papermaking, School of Food Sciences and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Ting Wang
- College of Biotechnology, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Yanan Zhao
- State Key Laboratory of Biobased Material and Green Papermaking, School of Food Sciences and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Yan Liang
- State Key Laboratory of Biobased Material and Green Papermaking, School of Food Sciences and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
- Correspondence: (Y.L.); (H.W.)
| | - Xiaochen Wang
- Shandong Center for Food and Drug Evaluation & Inspection, Jinan 250014, China
| | - Qian Chai
- Shandong Center for Food and Drug Evaluation & Inspection, Jinan 250014, China
| | - Yunjuan Zhang
- Shandong Center for Food and Drug Evaluation & Inspection, Jinan 250014, China
| | - Hongzhong Chen
- Shandong Center for Food and Drug Evaluation & Inspection, Jinan 250014, China
| | - Hua Wang
- School of Materials Science and Engineering, Shandong University, Jinan 250061, China
- Correspondence: (Y.L.); (H.W.)
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8
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Li C, Liu X, Huang Z, Zhai Y, Li H, Wu J. Lactoferrin Alleviates Lipopolysaccharide-Induced Infantile Intestinal Immune Barrier Damage by Regulating an ELAVL1-Related Signaling Pathway. Int J Mol Sci 2022; 23:ijms232213719. [PMID: 36430202 PMCID: PMC9696789 DOI: 10.3390/ijms232213719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 11/02/2022] [Accepted: 11/03/2022] [Indexed: 11/09/2022] Open
Abstract
As the most important intestinal mucosal barrier of the main body, the innate immune barrier in intestinal tract plays especially pivotal roles in the overall health conditions of infants and young children; therefore, how to strengthen the innate immune barrier is pivotal. A variety of bioactivities of lactoferrin (LF) has been widely proved, including alleviating enteritis and inhibiting colon cancer; however, the effects of LF on intestinal immune barrier in infants and young children are still unclear, and the specific mechanism on how LF inhibits infantile enteritis by regulating immune signaling pathways is unrevealed. In the present study, we firstly performed pharmacokinetic analyses of LF in mice intestinal tissues, stomach tissues and blood, through different administration methods, to confirm the metabolic method of LF in mammals. Then we constructed in Vitro and in Vivo infantile intestinal immune barrier damage models utilizing lipopolysaccharide (LPS), and evaluated the effects of LF in alleviating LPS-induced intestinal immune barrier damage. Next, the related immune molecular mechanism on how LF exerted protective effects was investigated, through RNA-seq analyses of the mouse primary intestinal epithelial cells, and the specific genes were analyzed and screened out. Finally, the genes and their related immune pathway were validated in mRNA and protein levels; the portions of special immune cells (CD4+ T cells and CD8+ T cells) were also detected to further support our experimental results. Pharmacokinetic analyses demonstrated that the integrity of LF could reach mice stomach and intestine after oral gavage within 12 h, and the proper administration of LF should be the oral route. LF was proven to down-regulate the expression levels of inflammatory cytokines in both the primary intestinal epithelial cells and mice blood, especially LF without iron (Apo-LF), indicating LF alleviated infantile intestinal immune barrier damage induced by LPS. And through RNA-seq analyses of the mouse primary intestinal epithelial cells treated with LPS and LF, embryonic lethal abnormal vision Drosophila 1 (ELAVL1) was selected as one of the key genes, then the ELAVL1/PI3K/NF-κB pathway regulated by LF was verified to participate in the protection of infantile intestinal immune barrier damage in our study. Additionally, the ratio of blood CD4+/CD8+ T cells was significantly higher in the LF-treated mice than in the control mice, indicating that LF distinctly reinforced the overall immunity of infantile mice, further validating the strengthening bioactivity of LF on infantile intestinal immune barrier. In summary, LF was proven to alleviate LPS-induced intestinal immune barrier damage in young mice through regulating ELAVL1-related immune signaling pathways, which would expand current knowledge of the functions of bioactive proteins in foods within different research layers, as well as benefit preclinical and clinical researches in a long run.
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Affiliation(s)
- Chaonan Li
- Beijing Key Laboratory of Food Processing and Safety in Forestry, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100085, China
| | - Xinkui Liu
- School of Chinese Pharmacy, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Zhihong Huang
- School of Chinese Pharmacy, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Yiyan Zhai
- School of Chinese Pharmacy, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Huiying Li
- Beijing Key Laboratory of Food Processing and Safety in Forestry, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100085, China
- Correspondence: (H.L.); (J.W.)
| | - Jiarui Wu
- School of Chinese Pharmacy, Beijing University of Chinese Medicine, Beijing 102488, China
- Correspondence: (H.L.); (J.W.)
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9
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Bovine Lactoferrin Induces Cell Death in Human Prostate Cancer Cells. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:2187696. [PMID: 36092155 PMCID: PMC9463017 DOI: 10.1155/2022/2187696] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 08/22/2022] [Indexed: 12/03/2022]
Abstract
Bovine lactoferrin (bLf) is a multifunctional protein widely associated with anticancer activity. Prostate cancer is the second most frequent type of cancer worldwide. This study was aimed at evaluating the influence of bLf on cell viability, cell cycle progression, reactive oxygen species (ROS) production, and rate of apoptosis in the human prostate cancer cell line (DU-145). MTT assay and trypan blue exclusion were used to analyze cell viability. Morphological changes were analyzed through optical microscopy after 24 h and 48 h of bLf treatment. FITC-bLf internalization and cellular damage were observed within 24 h by confocal fluorescence microscopy. Cell cycle analyses were performed by flow cytometry and propidium iodide. For caspases 3/7 activation and reactive oxygen species production evaluation, cells were live-imaged using the high-throughput system Operetta. The cell viability assays demonstrated that bLf induces cell death and morphological changes after 24 h and 48 h of treatment compared to control on DU-145 cells. The bLf internalization was detected in DU-145 cells, G1-phase arrest of the cell cycle, caspase 3/7 activation, and increased oxidative stress on bLf-treated cells. Our data support that bLf has an important anticancer activity, thus offering new perspectives in preventing and treating prostate cancer.
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