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Ligtenberg AJM, Bikker FJ, Bolscher JGM. LFchimera: a synthetic mimic of the two antimicrobial domains of bovine lactoferrin. Biochem Cell Biol 2021; 99:128-137. [PMID: 33560169 DOI: 10.1139/bcb-2020-0285] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Saliva is essential for the maintenance of oral health. When salivary flow is impaired, the risk of various oral diseases such as caries and candidiasis increases drastically. Under healthy conditions, saliva provides effective protection against microbial colonization by the collaborative action of numerous host-defense molecules. This review describes how saliva has been the guideline for the design and characterization of a heterodimeric antimicrobial construct called LFchimera. This construct mimics the helical parts of two antimicrobial domains in the crystal structure of bovine lactoferrin. It shows high antimicrobial activity against a broad spectrum of Gram-positive and Gram-negative bacteria, fungi, and parasites including biowarfare agents such as Bacillus anthracis, Burkholderia pseudomallei, and Yersinia pestis. Further, sublethal concentrations of LFchimera inhibited biofilm formation, the invasiveness of HeLa cells by Yersinia spp., and prevented haemolysis of enteropathogenic Escherichia coli, demonstrating the versatility of these peptides.
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Affiliation(s)
- A J M Ligtenberg
- Department of Oral Biochemistry, Academic Centre for Dentistry Amsterdam, Free University and University of Amsterdam, G. Mahlerlaan 3004, 1081LA Amsterdam, the Netherlands.,Department of Oral Biochemistry, Academic Centre for Dentistry Amsterdam, Free University and University of Amsterdam, G. Mahlerlaan 3004, 1081LA Amsterdam, the Netherlands
| | - F J Bikker
- Department of Oral Biochemistry, Academic Centre for Dentistry Amsterdam, Free University and University of Amsterdam, G. Mahlerlaan 3004, 1081LA Amsterdam, the Netherlands.,Department of Oral Biochemistry, Academic Centre for Dentistry Amsterdam, Free University and University of Amsterdam, G. Mahlerlaan 3004, 1081LA Amsterdam, the Netherlands
| | - J G M Bolscher
- Department of Oral Biochemistry, Academic Centre for Dentistry Amsterdam, Free University and University of Amsterdam, G. Mahlerlaan 3004, 1081LA Amsterdam, the Netherlands.,Department of Oral Biochemistry, Academic Centre for Dentistry Amsterdam, Free University and University of Amsterdam, G. Mahlerlaan 3004, 1081LA Amsterdam, the Netherlands
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2
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Ramírez-Sánchez DA, Arredondo-Beltrán IG, Canizalez-Roman A, Flores-Villaseñor H, Nazmi K, Bolscher JGM, León-Sicairos N. Bovine lactoferrin and lactoferrin peptides affect endometrial and cervical cancer cell lines. Biochem Cell Biol 2020; 99:149-158. [PMID: 33307991 DOI: 10.1139/bcb-2020-0074] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Cervical, uterine, and ovarian cancers are the most common malignancies of the female genital tract worldwide. Despite advances in prevention, early diagnosis, effective screening, and treatment programs, mortality remains high. Consequently, it is important to search for new treatments. The activity of bovine lactoferrin (bLF) and LF peptides against several types of cancer has been studied; however, only a few studies report the effect of bLF and LF peptides against cervical and endometrial cancers. In this study, we explored the effect of bLF as well as LF chimera and its constituent peptides LFcin17-30 and LFampin265-284 on the viability of cervical (HeLa, SiHa) and endometrial (KLE, HEC-1A) cancer cell lines. Cell proliferation was quantified with an MTT assay, cell morphological changes and damage were determined by Giemsa and phalloidin-TRITC and DAPI staining, and apoptotic and necrotic cells were identified by Alexa Fluor® 488 Annexin V and propidium iodide staining. Additionally, the effect of combinations of bLF and LF peptides with cisplatin was assessed. bLF and LF peptides inhibited the proliferation of uterine cancer cells and caused cellular morphological changes and damage to cell monolayers. bLF induced apoptosis, LFcin17-30 and LFampin265-284 induced apoptosis and necrosis, and LF chimera induced necrosis. Additionally, bLF and LF chimera showed an additive interaction with cisplatin against uterine cancer cells.
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Affiliation(s)
- Diana A Ramírez-Sánchez
- CIASaP, Facultad de Medicina, Universidad Autónoma de Sinaloa, Culiacán Sinaloa, México.,Programa Regional del Noroeste para el Doctorado en Biotecnología, Facultad de Ciencias Químico-Biológicas, Universidad Autónoma de Sinaloa, Culiacán Sinaloa, México
| | - Izamar G Arredondo-Beltrán
- CIASaP, Facultad de Medicina, Universidad Autónoma de Sinaloa, Culiacán Sinaloa, México.,Maestría en Ciencias en Biomedicina Molecular, Facultad de Medicina, Universidad Autónoma de Sinaloa, Culiacán Sinaloa, México
| | - Adrián Canizalez-Roman
- CIASaP, Facultad de Medicina, Universidad Autónoma de Sinaloa, Culiacán Sinaloa, México.,Hospital de la Mujer, Servicios de Salud de Sinaloa, Culiacán Sinaloa, México
| | | | - Kamran Nazmi
- Department of Oral Biochemistry ACTA, University of Amsterdam and VU University, Amsterdam, the Netherlands
| | - Jan G M Bolscher
- Department of Oral Biochemistry ACTA, University of Amsterdam and VU University, Amsterdam, the Netherlands
| | - Nidia León-Sicairos
- CIASaP, Facultad de Medicina, Universidad Autónoma de Sinaloa, Culiacán Sinaloa, México.,Departamento de Investigación del Hospital Pediátrico, Servicios de Salud de Sinaloa, Culiacán Sinaloa, México
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3
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Sijbrandij T, Ligtenberg AJ, Nazmi K, van den Keijbus PAM, Veerman ECI, Bolscher JGM, Bikker FJ. LFchimera protects HeLa cells from invasion by Yersinia spp. in vitro. Biometals 2018; 31:941-950. [PMID: 30136243 PMCID: PMC6245033 DOI: 10.1007/s10534-018-0136-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 08/17/2018] [Indexed: 11/30/2022]
Abstract
Yersinia pestis is the causative agent of plague. As adequate antibiotic treatment falls short and currently no effective vaccine is available, alternative therapeutic strategies are needed. In order to contribute to solving this problem we investigated the therapeutic potential of the peptide construct LFchimera against the safer-to-handle Y. pestis simulants Yersinia enterocolitica and Yersinia pseudotuberculosis in vitro. LFchimera is a heterodimeric peptide construct mimicking two antimicrobial domains of bovine lactoferrin, i.e. lactoferrampin and lactoferricin. LFchimera has been shown to be a potent antimicrobial peptide against a variety of bacteria in vitro and in vivo. Also Y. enterocolitica and Y. pseudotuberculosis have been shown to be susceptible for LFchimera in vitro. As Yersiniae spp. adhere to and invade host cells upon infection, we here investigated the effects of LFchimera on these processes. It was found that LFchimera has the capacity to inhibit host-cell invasion by Yersiniae spp. in vitro. This effect appeared to be host-cell mediated, not bacteria-mediated. Furthermore it was found that exposure of human HeLa epithelial cells to both LFchimera and the bacterial strains evoked a pro-inflammatory cytokine release from the cells in vitro.
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Affiliation(s)
- Tjitske Sijbrandij
- Department of Oral Biochemistry, Academic Centre for Dentistry Amsterdam, University of Amsterdam and VU University Amsterdam, Gustav Mahlerlaan 3004, 1081 LA, Amsterdam, The Netherlands
| | - Antoon J Ligtenberg
- Department of Oral Biochemistry, Academic Centre for Dentistry Amsterdam, University of Amsterdam and VU University Amsterdam, Gustav Mahlerlaan 3004, 1081 LA, Amsterdam, The Netherlands
| | - Kamran Nazmi
- Department of Oral Biochemistry, Academic Centre for Dentistry Amsterdam, University of Amsterdam and VU University Amsterdam, Gustav Mahlerlaan 3004, 1081 LA, Amsterdam, The Netherlands
| | - Petra A M van den Keijbus
- Department of Oral Biochemistry, Academic Centre for Dentistry Amsterdam, University of Amsterdam and VU University Amsterdam, Gustav Mahlerlaan 3004, 1081 LA, Amsterdam, The Netherlands
| | - Enno C I Veerman
- Department of Oral Biochemistry, Academic Centre for Dentistry Amsterdam, University of Amsterdam and VU University Amsterdam, Gustav Mahlerlaan 3004, 1081 LA, Amsterdam, The Netherlands
| | - Jan G M Bolscher
- Department of Oral Biochemistry, Academic Centre for Dentistry Amsterdam, University of Amsterdam and VU University Amsterdam, Gustav Mahlerlaan 3004, 1081 LA, Amsterdam, The Netherlands
| | - Floris J Bikker
- Department of Oral Biochemistry, Academic Centre for Dentistry Amsterdam, University of Amsterdam and VU University Amsterdam, Gustav Mahlerlaan 3004, 1081 LA, Amsterdam, The Netherlands.
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4
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Kieckens E, Rybarczyk J, Cox E, Vanrompay D. Antibacterial and immunomodulatory activities of bovine lactoferrin against Escherichia coli O157:H7 infections in cattle. Biometals 2018; 31:321-330. [PMID: 29442205 DOI: 10.1007/s10534-018-0082-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Accepted: 02/06/2018] [Indexed: 12/27/2022]
Abstract
Enterohemorrhagic Escherichia coli (EHEC) O157:H7 is a zoonotic pathogen that causes food-borne disease in humans ranging from watery diarrhea to bloody diarrhea and severe hemorrhagic colitis, renal failure and hemolytic uremic syndrome. Cattle, the most important source of E. coli O157:H7 transmission to humans, harbor the bacteria in their gastrointestinal tract without showing clinical symptoms. Prevention of E. coli O157:H7 infections in ruminants could diminish the public health risk. However, there is no specific treatment available nor a vaccine or a therapeutic agent which completely prevents E. coli O157:H7 infections in cattle. This paper provides an overview of latest research data on eradicating enterohemorrhagic E. coli O157:H7 in ruminants by use of bovine lactoferrin administration. The article provides insights into the anti-microbial and immunomodulatory activities of bovine lactoferrin against E. coli O157:H7 infections in cattle.
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Affiliation(s)
- Evelien Kieckens
- Laboratory of Immunology and Animal Biotechnology, Department of Animal Production, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Joanna Rybarczyk
- Laboratory of Immunology and Animal Biotechnology, Department of Animal Production, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Eric Cox
- Laboratory of Immunology, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - Daisy Vanrompay
- Laboratory of Immunology and Animal Biotechnology, Department of Animal Production, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium.
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5
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Acosta-Smith E, Viveros-Jiménez K, Canizalez-Román A, Reyes-Lopez M, Bolscher JGM, Nazmi K, Flores-Villaseñor H, Alapizco-Castro G, de la Garza M, Martínez-Garcia JJ, Velazquez-Roman J, Leon-Sicairos N. Bovine Lactoferrin and Lactoferrin-Derived Peptides Inhibit the Growth of Vibrio cholerae and Other Vibrio species. Front Microbiol 2018; 8:2633. [PMID: 29375503 PMCID: PMC5768654 DOI: 10.3389/fmicb.2017.02633] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 12/15/2017] [Indexed: 12/18/2022] Open
Abstract
Vibrio is a genus of Gram-negative bacteria, some of which can cause serious infectious diseases. Vibrio infections are associated with the consumption of contaminated food and classified in Vibrio cholera infections and non-cholera Vibrio infections. In the present study, we investigate whether bovine lactoferrin (bLF) and several synthetic peptides corresponding to bLF sequences, are able to inhibit the growth or have bactericidal effect against V. cholerae and other Vibrio species. The antibacterial activity of LF and LF-peptides was assessed by kinetics of growth or determination of colony forming unit in bacteria treated with the peptides and antibiotics. To get insight in the mode of action, the interaction between bLF and bLF-peptides (coupled to FITC) and V. cholera was evaluated. The damage of effector-induced bacterial membrane permeability was measured by inclusion of the fluorescent dye propidium iodide using flow cytometry, whereas the bacterial ultrastructural damage in bacteria treated was observed by transmission electron microscopy. The results showed that bLF and LFchimera inhibited the growth of the V. cholerae strains; LFchimera permeabilized the bacteria which membranes were seriously damaged. Assays with a multidrug-resistant strain of Vibrio species indicated that combination of sub-lethal doses of LFchimera with ampicillin or tetracycline strongly reduced the concentration of the antibiotics to reach 95% growth inhibition. Furthermore, LFchimera were effective to inhibit the V. cholerae counts and damage due to this bacterium in a model mice. These data suggest that LFchimera and bLF are potential candidates to combat the V. cholerae and other multidrug resistant Vibrio species.
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Affiliation(s)
- Erika Acosta-Smith
- Programa Regional Para el Doctorado en Biotecnología, Facultad de Ciencias Químico-Biológicas, Universidad Autónoma de Sinaloa, Culiacán, Mexico
| | - Karina Viveros-Jiménez
- Centro de Investigación Aplicada para la Salud Pública (CIASaP), Facultad de Medicina, Universidad Autónoma de Sinaloa, Culiacán, Mexico
| | - Adrian Canizalez-Román
- Centro de Investigación Aplicada para la Salud Pública (CIASaP), Facultad de Medicina, Universidad Autónoma de Sinaloa, Culiacán, Mexico.,Hospital de la Mujer, Servicios de Salud de Sinaloa, Culiacán, Mexico
| | - Magda Reyes-Lopez
- Departamento de Biología Celular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Mexico, Mexico
| | - Jan G M Bolscher
- Department of Oral Biochemistry ACTA, University of Amsterdam and VU University, Amsterdam, Netherlands
| | - Kamran Nazmi
- Department of Oral Biochemistry ACTA, University of Amsterdam and VU University, Amsterdam, Netherlands
| | - Hector Flores-Villaseñor
- Centro de Investigación Aplicada para la Salud Pública (CIASaP), Facultad de Medicina, Universidad Autónoma de Sinaloa, Culiacán, Mexico.,Laboratorio Estatal de Salud Pública de Sinaloa, Culiacán, Mexico
| | - Gerardo Alapizco-Castro
- Centro de Investigación Aplicada para la Salud Pública (CIASaP), Facultad de Medicina, Universidad Autónoma de Sinaloa, Culiacán, Mexico
| | - Mireya de la Garza
- Departamento de Biología Celular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Mexico, Mexico
| | - Jesús J Martínez-Garcia
- Centro de Investigación Aplicada para la Salud Pública (CIASaP), Facultad de Medicina, Universidad Autónoma de Sinaloa, Culiacán, Mexico.,Departamento de Investigación, Hospital Pediátrico de Sinaloa, Culiacán, Mexico
| | - Jorge Velazquez-Roman
- Centro de Investigación Aplicada para la Salud Pública (CIASaP), Facultad de Medicina, Universidad Autónoma de Sinaloa, Culiacán, Mexico
| | - Nidia Leon-Sicairos
- Centro de Investigación Aplicada para la Salud Pública (CIASaP), Facultad de Medicina, Universidad Autónoma de Sinaloa, Culiacán, Mexico.,Departamento de Investigación, Hospital Pediátrico de Sinaloa, Culiacán, Mexico
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6
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Reyes-Cortes R, Acosta-Smith E, Mondragón-Flores R, Nazmi K, Bolscher JGM, Canizalez-Roman A, Leon-Sicairos N. Antibacterial and cell penetrating effects of LFcin17-30, LFampin265-284, and LF chimera on enteroaggregative Escherichia coli. Biochem Cell Biol 2016; 95:76-81. [PMID: 28165291 DOI: 10.1139/bcb-2016-0088] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Lactoferrin (LF) is a protein with antimicrobial activity, which is conferred in part by 2 regions contained in its N-terminal lobe. These regions have been used to develop the following synthetic peptides: lactoferricin17-30, lactoferrampin265-284, and LF chimera (a fusion of lactoferricin17-30 and lactoferrampin265-284). We have reported that these LF peptides have antibacterial activity against several pathogenic bacteria; however, the exact mechanism of action has not been established. Here, we report the effects of LF peptides on the viability of enteroaggregative Escherichia coli (EAEC) and the ability of these peptides to penetrate into the bacteria cytoplasm. The viability of EAEC treated with LF peptides was determined via enumeration of colony-forming units, and the binding and internalization of the LF peptides was followed via immunogold labeling and electron microscopy. Treatment of EAEC with 20 and 40 μmol/L LF peptides reduced bacterial growth compared with untreated bacteria. Initially the peptides associated with the plasma membrane, but after 5 to 30 min of incubation, the peptides were found in the cytoplasm. Remarkably, bacteria treated with LF chimera developed cytosolic electron-dense structures that contained the antimicrobial peptide. Our results suggest that the antibacterial mechanism of LF peptides on EAEC involves their interaction with and penetration into the bacteria.
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Affiliation(s)
- Ruth Reyes-Cortes
- a CIASaP, Facultad de Medicina, Universidad Autónoma de Sinaloa, Cedros y Sauces, Fracc. Fresnos C.P. 80246, Culiacán, Sinaloa, Mexico
| | - Erika Acosta-Smith
- a CIASaP, Facultad de Medicina, Universidad Autónoma de Sinaloa, Cedros y Sauces, Fracc. Fresnos C.P. 80246, Culiacán, Sinaloa, Mexico
| | - Ricardo Mondragón-Flores
- b Departamento de Bioquímica, Centro de Investigación y Estudios Avanzados del IPN, Avenida IPN #2508, Del. G.A. Madero, Ciudad de México, Mexico
| | - Kamran Nazmi
- c Department of Oral Biochemistry, Academic Centre for Dentistry Amsterdam, University of Amsterdam and VU University, 1081 LA, Amsterdam, the Netherlands
| | - Jan G M Bolscher
- c Department of Oral Biochemistry, Academic Centre for Dentistry Amsterdam, University of Amsterdam and VU University, 1081 LA, Amsterdam, the Netherlands
| | - Adrian Canizalez-Roman
- a CIASaP, Facultad de Medicina, Universidad Autónoma de Sinaloa, Cedros y Sauces, Fracc. Fresnos C.P. 80246, Culiacán, Sinaloa, Mexico.,d Departamento de Investigación, Hospital de la Mujer, Boulevard Miguel Tamayo Espinoza de los Monteros S/N, Col. Desarrollo Urbano Tres Ríos, Culiacán 80020, Sinaloa, Mexico
| | - Nidia Leon-Sicairos
- a CIASaP, Facultad de Medicina, Universidad Autónoma de Sinaloa, Cedros y Sauces, Fracc. Fresnos C.P. 80246, Culiacán, Sinaloa, Mexico.,e Departamento de Investigación, Hospital Pediátrico de Sinaloa, Boulevard Constitución S/N, col. Jorge Almada, Culiacan 80200, Sinaloa, Mexico
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7
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Samaniego-Barrón L, Luna-Castro S, Piña-Vázquez C, Suárez-Güemes F, de la Garza M. Two outer membrane proteins are bovine lactoferrin-binding proteins in Mannheimia haemolytica A1. Vet Res 2016; 47:93. [PMID: 27599994 PMCID: PMC5013584 DOI: 10.1186/s13567-016-0378-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Accepted: 07/14/2016] [Indexed: 11/10/2022] Open
Abstract
Mannheimia haemolytica is a Gram negative bacterium that is part of the bovine respiratory disease, which causes important economic losses in the livestock industry. In the present work, the interaction between M. haemolytica A1 and bovine lactoferrin (BLf) was studied. This iron-chelating glycoprotein is part of the mammalian innate-immune system and is present in milk and mucosal secretions; Lf is also contained in neutrophils secondary granules, which release this glycoprotein at infection sites. It was evidenced that M. haemolytica was not able to use iron-charged BLf (BholoLf) as a sole iron source; nevertheless, iron-lacked BLf (BapoLf) showed a bactericidal effect against M. haemolytica with MIC of 4.88 ± 1.88 and 7.31 ± 1.62 μM for M. haemolytica strain F (field isolate) and M. haemolytica strain R (reference strain), respectively. Through overlay assays and 2-D electrophoresis, two OMP of 32.9 and 34.2 kDa with estimated IP of 8.18 and 9.35, respectively, were observed to bind both BapoLf and BholoLf; these OMP were identified by Maldi-Tof as OmpA (heat-modifiable OMP) and a membrane protein (porin). These M. haemolytica BLf binding proteins could be interacting in vivo with both forms of BLf depending on the iron state of the bovine.
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Affiliation(s)
- Luisa Samaniego-Barrón
- Departamento de Biología Celular, Centro de Investigación y de Estudios Avanzados del IPN (CINVESTAV-IPN), Avenida Instituto Politécnico Nacional No. 2508, Colonia San Pedro Zacatenco, CP 07360 Ciudad de México, Mexico
| | - Sarahí Luna-Castro
- Facultad de Medicina Veterinaria y Zootecnia Dr. Norberto Treviño Zapata, Universidad Autónoma de Tamaulipas, Carretera a Cd. Mante Km 5, CP 87000 Ciudad Victoria, Tamaulipas Mexico
| | - Carolina Piña-Vázquez
- Departamento de Biología Celular, Centro de Investigación y de Estudios Avanzados del IPN (CINVESTAV-IPN), Avenida Instituto Politécnico Nacional No. 2508, Colonia San Pedro Zacatenco, CP 07360 Ciudad de México, Mexico
| | - Francisco Suárez-Güemes
- Departamento de Microbiología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México (UNAM), Av. Universidad 3000, Cd. Universitaria, Coyoacán, CP 04510 Ciudad de México, Mexico
| | - Mireya de la Garza
- Departamento de Biología Celular, Centro de Investigación y de Estudios Avanzados del IPN (CINVESTAV-IPN), Avenida Instituto Politécnico Nacional No. 2508, Colonia San Pedro Zacatenco, CP 07360 Ciudad de México, Mexico
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8
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Ultrastructural effects and antibiofilm activity of LFchimera against Burkholderia pseudomallei. World J Microbiol Biotechnol 2016; 32:33. [DOI: 10.1007/s11274-015-1988-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Accepted: 11/28/2015] [Indexed: 01/28/2023]
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9
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Tan L, Zhang Y, Peng W, Chen J, Li H, Ming F. Detection of anti-lactoferrin antibodies and anti-myeloperoxidase antibodies in autoimmune hepatitis: a retrospective study. J Immunoassay Immunochem 2015; 35:388-97. [PMID: 24547729 DOI: 10.1080/15321819.2013.879450] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Anti-lactoferrin antibodies (ALA) and anti-myeloperoxidase antibodies (AMPA) are specific serological markers for autoimmune hepatitis (AIH). The project aimed to detect ALA and AMPA and explore their clinical significances in AIH patients. 59 AIH patients, 217 non AIH patients, and 50 healthy controls were enrolled in this study. ALA and AMPA were detected by ELISA. Antineutropil cytoplasmic antibodies (ANCA) and anti-smooth muscle antibodies (ASMA) were examined by indirect immunofluorescence. Antimitochondrial antibody M2 subtype (AMA-M2), anti-liver kidney microsomal antibody Type 1 (LKM1), anti-liver cytosol antibody Type 1 (LC1), and anti-soluble liver antigen/liver-pancreas antibodies (SLA/LP) were tested by immunoblot. The positivity for ALA was 18.6% in AIH group, only one patient in non-AIH group was positive for ALA; the positivity for AMPA was 59.3% in AIH group, with significant differences (P < 0.01) compared with other groups. The specificities for ALA and AMPA were 99.63% and 97.75%; the sensitivities were 18.64% and 59.32%; and the accuracy rates were 84.97% and 90.80%, respectively. A certain correlation was observed between ALA and SLA/LP, AMPA and ANCA, ASMA in AIH group. ALA and AMPA were associated with AIH, and had high clinical diagnostic value. Co-detection with other relative autoantibodies could play an important role in differential diagnosis of AIH.
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Affiliation(s)
- Liming Tan
- a Department of Clinical Laboratory , The Second Affiliated Hospital of Nanchang University , Nanchang , P. R. China
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10
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León-Sicairos N, Angulo-Zamudio UA, Vidal JE, López-Torres CA, Bolscher JGM, Nazmi K, Reyes-Cortes R, Reyes-López M, de la Garza M, Canizalez-Román A. Bactericidal effect of bovine lactoferrin and synthetic peptide lactoferrin chimera in Streptococcus pneumoniae and the decrease in luxS gene expression by lactoferrin. Biometals 2014; 27:969-80. [PMID: 25053107 DOI: 10.1007/s10534-014-9775-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Accepted: 07/05/2014] [Indexed: 11/28/2022]
Abstract
Streptococcus pneumoniae (pneumococcus) is responsible for nearly one million child deaths annually. Pneumococcus causes infections such as pneumonia, otitis media, meningitis, and sepsis. The human immune system includes antibacterial peptides and proteins such as lactoferrin (LF), but its activity against pneumococcus is not fully understood. The aim of this work was to evaluate the bactericidal effect of bovine lactoferrin (bLF) and the synthetic LF-peptides lactoferricin (LFcin17-30), lactoferrampin (LFampin265-284), and LFchimera against S. pneumoniae planktonic cells. The mechanism of damage was also investigated, as well as the impact of these peptides on the transcription levels of genes known to encode important virulence factors. S. pneumoniae planktonic cells were treated with bLF, LFcin17-30, LFampin265-284 and LFchimera at different time points. The viability of treated planktonic cells was assessed by dilution and plating (in CFU/ml). The interaction between LF and LF-peptides coupled to fluorescein was visualized using a confocal microscope and flow cytometry, whereas the damage at structural levels was observed by electron microscopy. Damage to bacterial membranes was further evaluated by membrane permeabilization by use of propidium iodide and flow cytometry, and finally, the expression of pneumococcal genes was evaluated by qRT-PCR. bLF and LFchimera were the best bactericidal agents. bLF and peptides interacted with bacteria causing changes in the shape and size of the cell and membrane permeabilization. Moreover, the luxS gene was down-regulated in bacteria treated with LF. In conclusion, LF and LFchimera have a bactericidal effect, and LF down-regulates genes involved in the pathogenicity of pneumococcus, thus demonstrating potential as new agents for the treatment of pneumococcal infections.
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Affiliation(s)
- Nidia León-Sicairos
- Unidad de Investigación, Facultad de Medicina, Universidad Autónoma de Sinaloa, Cedros y Sauces, Fracc. Fresnos., C.P. 80246, Culiacán, Sinaloa, Mexico,
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11
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Kanthawong S, Puknun A, Bolscher JGM, Nazmi K, van Marle J, de Soet JJ, Veerman ECI, Wongratanacheewin S, Taweechaisupapong S. Membrane-active mechanism of LFchimera against Burkholderia pseudomallei and Burkholderia thailandensis. Biometals 2014; 27:949-56. [PMID: 24961697 DOI: 10.1007/s10534-014-9760-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Accepted: 06/06/2014] [Indexed: 12/27/2022]
Abstract
LFchimera, a construct combining two antimicrobial domains of bovine lactoferrin, lactoferrampin265-284 and lactoferricin17-30, possesses strong bactericidal activity. As yet, no experimental evidence was presented to evaluate the mechanisms of LFchimera against Burkholderia isolates. In this study we analyzed the killing activity of LFchimera on the category B pathogen Burkholderia pseudomallei in comparison to the lesser virulent Burkholderia thailandensis often used as a model for the highly virulent B. pseudomallei. Killing kinetics showed that B. thailandensis E264 was more susceptible for LFchimera than B. pseudomallei 1026b. Interestingly the bactericidal activity of LFchimera appeared highly pH dependent; B. thailandensis killing was completely abolished at and below pH 6.4. FITC-labeled LFchimera caused a rapid accumulation within 15 min in the cytoplasm of both bacterial species. Moreover, freeze-fracture electron microscopy demonstrated extreme effects on the membrane morphology of both bacterial species within 1 h of incubation, accompanied by altered membrane permeability monitored as leakage of nucleotides. These data indicate that the mechanism of action of LFchimera is similar for both species and encompasses disruption of the plasma membrane and subsequently leakage of intracellular nucleotides leading to cell dead.
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Affiliation(s)
- Sakawrat Kanthawong
- Department of Microbiology, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand
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Luna-Castro S, Aguilar-Romero F, Samaniego-Barrón L, Godínez-Vargas D, de la Garza M. Effect of bovine apo-lactoferrin on the growth and virulence of Actinobacillus pleuropneumoniae. Biometals 2014; 27:891-903. [DOI: 10.1007/s10534-014-9752-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2014] [Accepted: 05/15/2014] [Indexed: 01/01/2023]
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Adhesion of Diarrheagenic Escherichia coli and Inhibition by Glycocompounds Engaged in the Mucosal Innate Immunity. BIOLOGY 2013; 2:810-31. [PMID: 24832810 PMCID: PMC3960885 DOI: 10.3390/biology2020810] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Revised: 05/18/2013] [Accepted: 05/22/2013] [Indexed: 11/17/2022]
Abstract
Escherichia coli colonizes the human intestine shortly after birth, with most strains engaging in a commensal relationship. However, some E. coli strains have evolved toward acquiring genetic traits associated with virulence. Currently, five categories of enteroadherent E. coli strains are well-recognized, and are classified in regard to expressed adhesins and the strategy used during the colonization. The high morbidity associated with diarrhea has motivated investigations focusing on E. coli adhesins, as well on factors that inhibit bacterial adherence. Breastfeeding has proved to be the most effective strategy for preventing diarrhea in children. Aside from the immunoglobulin content, glycocompounds and oligosaccharides in breast milk play a critical role in the innate immunity against diarrheagenic E. coli strains. This review summarizes the colonization factors and virulence strategies exploited by diarrheagenic E. coli strains, addressing the inhibitory effects that oligosaccharides and glycocompounds, such as lactoferrin and free secretory components, exert on the adherence and virulence of these strains. This review thus provides an overview of experimental data indicating that human milk glycocompounds are responsible for the universal protective effect of breastfeeding against diarrheagenic E. coli pathotypes.
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Prevalence and antibiotic resistance profiles of diarrheagenic Escherichia coli strains isolated from food items in northwestern Mexico. Int J Food Microbiol 2013; 164:36-45. [PMID: 23587712 DOI: 10.1016/j.ijfoodmicro.2013.03.020] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Revised: 03/07/2013] [Accepted: 03/15/2013] [Indexed: 01/06/2023]
Abstract
Diarrheogenic Escherichia coli (DEC) strains are an important cause of intestinal syndromes in the developing world mainly affecting children. DEC strains often infect tourists from developed countries traveling to Mexico, causing so-called "traveler diarrhea". DEC strains are typically transmitted by contaminated food and water; however, the prevalence of these strains in food items that are produced, consumed and sometimes exported in northwestern Mexico has not been evaluated. In this study, we conducted a large microbiological survey of DEC strains in 5162 food items and beverages consumed throughout Sinaloa state during 2008 and 2009. We developed a panel of eight sequential PCR reactions that detected the presence of all DEC categories, including typical or atypical variants. Thermotolerant coliforms (also known as fecal coliforms) and E. coli were detected by conventional bacteriology in 13.4% (692/5162) and 7.92% (409/5162) of food items, respectively. Among 409 E. coli isolates, 13.6% (56/409) belonged to DEC strains. Dairy products (2.8%) were the most contaminated with DEC, while DEC strains were not detected in beverages and ice samples. The pathogenic type that was most commonly isolated was EPEC (78.5%), followed by EAEC (10.7%), STEC (8.9%) and ETEC (1.7%). EHEC, DAEC and EIEC strains were not detected. Approximately 80% of EPEC and EAEC strains were classified as atypical variants; they did not adhere to a culture of HEp-2 cell. Of the isolated DEC strains, 66% showed resistance to at least one commonly prescribed antibiotic. In conclusion, the presence of DEC strains in food items and beverages available in northwestern Mexico is low and may not represent a threat for the general population or those traveling to tourist areas.
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