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Association between Antimicrobial Peptide Histatin 5 Levels and Prevalence of Candida in Saliva of Patients with Down Syndrome. Antibiotics (Basel) 2021; 10:antibiotics10050494. [PMID: 33925785 PMCID: PMC8145106 DOI: 10.3390/antibiotics10050494] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 04/19/2021] [Accepted: 04/19/2021] [Indexed: 11/30/2022] Open
Abstract
There are no studies on Candida colonization and micropeptides of saliva in any patient. Therefore, we studied the effects of the salivary antimicrobial peptide histatin 5 on oral fungal colonization; subjects were subdivided into Down syndrome (D) and normal (N) groups by age: N-1 and D-1, age <20 years; N-2 and D-2, age >40 years. Histatin 5 concentration in saliva was measured by enzyme-linked immunosorbent assay. Oral Candida species were identified using CHROMagar Candida. Candida colonization was significantly enhanced in the D-1 and D-2 groups compared to the N-1 and N-2 groups. There was no predominant difference in salivary histatin 5 concentration between the D-1 and N-1 groups, but it was significantly lower in the D-2 group than in the N-2 group. Only in the N-2 group was there a correlation between the concentration of histatin 5 and total protein, while no correlation was found in the other groups. In elderly patients with Down syndrome, the decrease in histatin 5 shown in this study may lead to oral Candida colony formation. Therefore, the results of this study suggest that a deficiency of the antimicrobial peptide histatin 5 could possibly induce oral Candida infection in DS.
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Siwakul P, Sirinnaphakorn L, Suwanprateep J, Hayakawa T, Pugdee K. Cellular responses of histatin-derived peptides immobilized titanium surface using a tresyl chloride-activated method. Dent Mater J 2021; 40:934-941. [PMID: 33814533 DOI: 10.4012/dmj.2020-307] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Effects of histatin-derived peptides immobilization by tresyl chloride-activation technique for MC3T3-E1 cellular responses on titanium (Ti) were evaluated. MC3T3-E1 were cultured on sandblasted and acid-etched Ti disks immobilized with histatin-derived peptides, including histatin-1, JH8194, and mixed histatin-1 with JH8194. Surface topography and cellular morphology were examined using a scanning electron microscope. Elemental composition and conformational peptides on Ti surface were examined using energy dispersive X-ray and fourier transform infrared spectroscopy, respectively. Cellular adhesion, proliferation, osteogenesis-related genes, and alkaline phosphatase activity were evaluated. The results showed that peptides were successfully immobilized on Ti surface. Cell attachments on histatin-1 and mixed peptides coated groups are higher than control. Histatin-1 achieved the significantly highest cellular proliferation. Histatin-derived peptides improved the osteogenesis related-gene expression and alkaline phosphatase activity (p<0.05). This study suggested that histatin-1 immobilization by tresyl chloride-activation technique enhanced cellular responses and might be able to promote cellular activities around the dental implants.
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Affiliation(s)
| | | | - Jintamai Suwanprateep
- Biomedical Engineering Research Unit, National Metal and Materials Technology Center, Ministry of Science and Technology
| | - Tohru Hayakawa
- Department of Dental Engineering, Tsurumi University School of Dental Medicine
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Ramezani J, Khaligh MR, Ansari G, Yazdani Y, Mohammadi S. Association of salivary physicochemical characteristics and peptide levels with dental caries in children. J Indian Soc Pedod Prev Dent 2021; 39:189-195. [PMID: 34341240 DOI: 10.4103/jisppd.jisppd_251_20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
AIM The purpose of this investigation was to evaluate the association of physicochemical properties and antimicrobial peptide levels of saliva with caries activity in children. MATERIALS AND METHODS The required volume of unstimulated saliva was collected from 41 children aged 3-12 years with no systemic diseases. Caries activity was calculated using DMFS and dmfs records for each participating child. Collected saliva samples were then examined for their flow rate, pH, and buffering capacity. The concentration of three peptides was assessed including LL-37, human neutrophil peptide (HNP) 1-3, and human beta-defensin (HBD)-3 through an enzyme-linked immunosorbent assay. The correlation between caries activity score (CAS) and salivary variables was looked using the linear regression and Spearman's correlation method. The comparison of CAS means between high- and low-value groups of salivary items was performed using independent sample t-test while the association of CAS and salivary parameters in categorical scale was tested by Chi-square test. RESULTS No statistically significant differences were found between the CAS means at low and high categories of each salivary physicochemical parameter and those of antimicrobial peptides. There was a negative correlation between HNP1-3 and CAS and also between HBD-3 and CAS, but these results were not statistically meaningful. High HNP1-3 concentration was noted in 67% of the low caries rate group and 29% of the high caries rate group, with a statistically significant difference between the low and high caries rate groups (P = 0.019). CONCLUSION Salivary inherent factors are not dominant determinants in caries activity. The current results may suggest that α-defensins (HNP1-3) have a protective role against dental caries.
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Affiliation(s)
- Jamileh Ramezani
- Department of Pediatric Dentistry, Faculty of Dentistry, Golestan University of Medical Sciences; Dental Research Center, Golestan University of Medical Sciences, Gorgan, Iran
| | - Mehrdad Rezaei Khaligh
- Department of Pediatric Dentistry, Faculty of Dentistry, Golestan University of Medical Sciences; Dental Research Center, Golestan University of Medical Sciences, Gorgan, Iran
| | - Ghassem Ansari
- Department of Pediatric Dentistry, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Yaghoub Yazdani
- Department of Medical Immunology, Faculty of Advanced Medical Science Technologies, Golestan University of Medical Sciences, Gorgan, Iran
| | - Saeed Mohammadi
- Department of Molecular Medicine, Faculty of Advanced Medical Science Technologies, Golestan University of Medical Sciences, Gorgan, Iran
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Steinberg R, Koch HG. The largely unexplored biology of small proteins in pro- and eukaryotes. FEBS J 2021; 288:7002-7024. [PMID: 33780127 DOI: 10.1111/febs.15845] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 03/11/2021] [Accepted: 03/26/2021] [Indexed: 12/29/2022]
Abstract
The large abundance of small open reading frames (smORFs) in prokaryotic and eukaryotic genomes and the plethora of smORF-encoded small proteins became only apparent with the constant advancements in bioinformatic, genomic, proteomic, and biochemical tools. Small proteins are typically defined as proteins of < 50 amino acids in prokaryotes and of less than 100 amino acids in eukaryotes, and their importance for cell physiology and cellular adaptation is only beginning to emerge. In contrast to antimicrobial peptides, which are secreted by prokaryotic and eukaryotic cells for combatting pathogens and competitors, small proteins act within the producing cell mainly by stabilizing protein assemblies and by modifying the activity of larger proteins. Production of small proteins is frequently linked to stress conditions or environmental changes, and therefore, cells seem to use small proteins as intracellular modifiers for adjusting cell metabolism to different intra- and extracellular cues. However, the size of small proteins imposes a major challenge for the cellular machinery required for protein folding and intracellular trafficking and recent data indicate that small proteins can engage distinct trafficking pathways. In the current review, we describe the diversity of small proteins in prokaryotes and eukaryotes, highlight distinct and common features, and illustrate how they are handled by the protein trafficking machineries in prokaryotic and eukaryotic cells. Finally, we also discuss future topics of research on this fascinating but largely unexplored group of proteins.
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Affiliation(s)
- Ruth Steinberg
- Institute for Biochemistry and Molecular Biology, Zentrum für Biochemie und Molekulare Medizin (ZMBZ), Faculty of Medicine, Albert-Ludwigs-Universität Freiburg, Germany
| | - Hans-Georg Koch
- Institute for Biochemistry and Molecular Biology, Zentrum für Biochemie und Molekulare Medizin (ZMBZ), Faculty of Medicine, Albert-Ludwigs-Universität Freiburg, Germany
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Handajani J, Kusumajati D, Fathiyah H, Susilowati H, Tandelilin RT. Quality improvement of saliva by chewing tapioca pearls in bubble tea drinks: a randomized experimental trial: (Study on salivary C-reactive protein (CRP) and calcium (Ca) levels). F1000Res 2021; 10:56. [PMID: 35387272 PMCID: PMC8938629 DOI: 10.12688/f1000research.28028.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/01/2022] [Indexed: 01/31/2024] Open
Abstract
Background: Bubble tea drinks contain tea and tapioca pearls. Chewing tapioca pearls in bubble tea drinks may increase salivary components. Because of its proteins, inorganic components, and enzymes, saliva plays an important role in the body's defense against bacteria and viruses. This study aims to analyze the effect of chewing tapioca pearls in bubble tea drinks on salivary C-reactive protein (CRP) and calcium (Ca) levels. Methods: The inclusion criterion was 18-25 years of age. The exclusion criteria were receiving medication, using dentures, a history of dry mouth, smoking and systemic disease. In the first week of the experiment, subjects drank bubble tea with tapioca pearls for three days (intervention week). In the second week, the same subjects drank tea without pearls for three days (control week). Each subject drank the bubble tea for 5 minutes per day over 3 days. Saliva samples were collected on the first day before bubble tea consumption (pretest) and on the third day after tea consumption (posttest). Saliva collection was performed in the morning (09:00 am-12:00 pm) for 1 minute. Sixty saliva samples were collected from 15 subjects. Salivary CRP levels were measured using a commercial ELISA kit, and Ca levels were determined using semi-quantitative test strips. Results: Salivary CRP decreased significantly on the third day in the intervention group but showed no significant difference with the control group. Calcium levels increased significantly on the third day in both groups. Conclusion: Bubble tea drinks could improve the quality of saliva by decreasing salivary CRP and increasing Ca levels. Trial registration: ClinicalTrials.gov, NCT04670341 (17 th December 2020).
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Affiliation(s)
- Juni Handajani
- Department of Oral Biology, Faculty of Dentistry, Universitas Gadjah Mada, Yogyakarta, Indonesia, 55281, Indonesia
| | - Dinda Kusumajati
- Dental Hygiene Study Program, Faculty of Dentistry, Universitas Gadjah Mada, Yogyakarta, Indonesia, 55281, Indonesia
| | - Hania Fathiyah
- Dental Hygiene Study Program, Faculty of Dentistry, Universitas Gadjah Mada, Yogyakarta, Indonesia, 55281, Indonesia
| | - Heni Susilowati
- Department of Oral Biology, Faculty of Dentistry, Universitas Gadjah Mada, Yogyakarta, Indonesia, 55281, Indonesia
| | - Regina T.C. Tandelilin
- Department of Oral Biology, Faculty of Dentistry, Universitas Gadjah Mada, Yogyakarta, Indonesia, 55281, Indonesia
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Portelinha J, Duay SS, Yu SI, Heilemann K, Libardo MDJ, Juliano SA, Klassen JL, Angeles-Boza AM. Antimicrobial Peptides and Copper(II) Ions: Novel Therapeutic Opportunities. Chem Rev 2021; 121:2648-2712. [PMID: 33524257 DOI: 10.1021/acs.chemrev.0c00921] [Citation(s) in RCA: 48] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The emergence of new pathogens and multidrug resistant bacteria is an important public health issue that requires the development of novel classes of antibiotics. Antimicrobial peptides (AMPs) are a promising platform with great potential for the identification of new lead compounds that can combat the aforementioned pathogens due to their broad-spectrum antimicrobial activity and relatively low rate of resistance emergence. AMPs of multicellular organisms made their debut four decades ago thanks to ingenious researchers who asked simple questions about the resistance to bacterial infections of insects. Questions such as "Do fruit flies ever get sick?", combined with pioneering studies, have led to an understanding of AMPs as universal weapons of the immune system. This review focuses on a subclass of AMPs that feature a metal binding motif known as the amino terminal copper and nickel (ATCUN) motif. One of the metal-based strategies of hosts facing a pathogen, it includes wielding the inherent toxicity of copper and deliberately trafficking this metal ion into sites of infection. The sudden increase in the concentration of copper ions in the presence of ATCUN-containing AMPs (ATCUN-AMPs) likely results in a synergistic interaction. Herein, we examine common structural features in ATCUN-AMPs that exist across species, and we highlight unique features that deserve additional attention. We also present the current state of knowledge about the molecular mechanisms behind their antimicrobial activity and the methods available to study this promising class of AMPs.
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Affiliation(s)
- Jasmin Portelinha
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Searle S Duay
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States.,Chemistry Department, Adamson University, 900 San Marcelino Street, Ermita, Manila 1000, Philippines
| | - Seung I Yu
- Department of Molecular and Cell Biology, University of Connecticut, 91 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Kara Heilemann
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - M Daben J Libardo
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Samuel A Juliano
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Jonathan L Klassen
- Department of Molecular and Cell Biology, University of Connecticut, 91 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Alfredo M Angeles-Boza
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States.,Institute of Material Science, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
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Blanco PM, Madurga S, Garcés JL, Mas F, Dias RS. Influence of macromolecular crowding on the charge regulation of intrinsically disordered proteins. SOFT MATTER 2021; 17:655-669. [PMID: 33215185 DOI: 10.1039/d0sm01475c] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In this work we study the coupling between ionization and conformational properties of two IDPs, histatin-5 and β-amyloid 42, in the presence of neutral and charged crowders. The latter is modeled to resemble bovine serum albumin (BSA). With this aim, semi-grand canonical Monte Carlo simulations are performed, so that the IDP charge is a dynamic property, undergoing protonation/deprotonation processes. Both ionization properties (global and specific amino acid charge and binding capacitance) and radius of gyration are analyzed in a large range of pH values and salt concentrations. Without crowder agents, the titration curve of histatin-5, a polycation, is salt-dependent while that of β-amyloid 42, a polyampholyte, is almost unaffected. The salt concentration is found to be particularly relevant at pH values where the protein binding capacitance (directly linked with charge fluctuation) is larger. Upon addition of neutral crowders, charge regulation is observed in histatin-5, while for β-amyloid 42 this effect is very small. The main mechanism for charge regulation is found to be the effective increase in the ionic strength due to the excluded volume. In the presence of charged crowders, a significant increase in the charge of both IDPs is observed in almost all the pH range. In this case, the IDP charge is altered not only by the increase in the effective ionic strength but also by its direct electrostatic interaction with the charged crowders.
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Affiliation(s)
- Pablo M Blanco
- Physical Chemistry Unit, Materials Science and Physical Chemistry Department & Research Institute of Theoretical and Computational Chemistry (IQTCUB) of Barcelona University (UB), Barcelona, Catalonia, Spain.
| | - Sergio Madurga
- Physical Chemistry Unit, Materials Science and Physical Chemistry Department & Research Institute of Theoretical and Computational Chemistry (IQTCUB) of Barcelona University (UB), Barcelona, Catalonia, Spain.
| | - Josep L Garcés
- Chemistry Department, Technical School of Agricultural Engineering & AGROTECNIO of Lleida University (UdL), Lleida, Catalonia, Spain
| | - Francesc Mas
- Physical Chemistry Unit, Materials Science and Physical Chemistry Department & Research Institute of Theoretical and Computational Chemistry (IQTCUB) of Barcelona University (UB), Barcelona, Catalonia, Spain.
| | - Rita S Dias
- Department of Physics, Norwegian University of Science and Technology (NTNU), Trondheim, Norway.
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Valand N, Girija UV. Candida Pathogenicity and Interplay with the Immune System. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1313:241-272. [PMID: 34661898 DOI: 10.1007/978-3-030-67452-6_11] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Candida species are opportunistic fungal pathogens that are part of the normal skin and mucosal microflora. Overgrowth of Candida can cause infections such as thrush or life-threatening invasive candidiasis in immunocompromised patients. Though Candida albicans is highly prevalent, several non-albicans species are also isolated from nosocomial infections. Candida sp. are over presented in the gut of people with Crohn's disease and certain types of neurological disorders, with hyphal form and biofilms being the most virulent states. In addition, Candida uses several secreted and cell surface molecules such as pH related antigen 1, High affinity glucose transporter, Phosphoglycerate mutase 1 and lipases to establish pathogenicity. A strong innate immune response is elicited against Candida via dendritic cells, neutrophils and macrophages. All three complement pathways are also activated. Production of proinflammatory cytokines IL-10 and IL-12 signal differentiation of CD4+ cells into Th1 and Th2 cells, whereas IL-6, IL-17 and IL-23 induce Th17 cells. Importance of T-lymphocytes is reflected in depleted T-cell count patients being more prone to Candidiasis. Anti- Candida antibodies also play a role against candidiasis using various mechanisms such as targeting virulent enzymes and exhibiting direct candidacidal activity. However, the significance of antibody response during infection remains controversial. Furthermore, some of the Candida strains have evolved molecular strategies to evade the sophisticated host attack by proteolysis of components of immune system and interfering with immune signalling pathways. Emergence of several non-albicans species that are resistant to current antifungal agents makes treatment more difficult. Therefore, deeper insight into interactions between Candida and the host immune system is required for discovery of novel therapeutic options.
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Affiliation(s)
- Nisha Valand
- Leicester School of Allied Health and Life sciences, Faculty of Health and Life Sciences, De Montfort University, Leicester, UK
| | - Umakhanth Venkatraman Girija
- Leicester School of Allied Health and Life sciences, Faculty of Health and Life Sciences, De Montfort University, Leicester, UK.
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Guerreiro C, Jesus M, Brandão E, Mateus N, de Freitas V, Soares S. Interaction of a Procyanidin Mixture with Human Saliva and the Variations of Salivary Protein Profiles over a 1-Year Period. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:13824-13832. [PMID: 33170702 DOI: 10.1021/acs.jafc.0c05722] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Procyanidins are widely associated with astringency perception and promptly interact/precipitate salivary proteins (SPs). In this work, the SP profile of 17 volunteers was monitored for 1 year, focusing on the SP families most related to astringency [aPRPs (acidic proline-rich proteins), bPRPs (basic proline-rich proteins), gPRPs (glycosylated proline-rich proteins), cystatins, P-B peptide, and statherin]. Although the total SP content remained constant, bPRPs showed high variability. Saliva from 5 volunteers was selected, each individual's saliva presenting a prominence in one of the referred SP families; each was used to interact with grape seed procyanidin oligomeric fraction. Independent of the prominences, a total depletion in statherin and P-B peptide was observed. These subjects performed a sensory assay and the limit of detection for astringency was determined. Overall, the specificity of SP toward procyanidins seemed to be more important in the interactions than the total SP content. The highest reactivity toward SPs was observed for epicatechin gallate, procyanidin dimers B7, B2g, and trimer C1.
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Affiliation(s)
- Carlos Guerreiro
- REQUIMTE/LAQV, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre, 689 Porto, Portugal
| | - Monica Jesus
- REQUIMTE/LAQV, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre, 689 Porto, Portugal
| | - Elsa Brandão
- REQUIMTE/LAQV, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre, 689 Porto, Portugal
| | - Nuno Mateus
- REQUIMTE/LAQV, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre, 689 Porto, Portugal
| | - Victor de Freitas
- REQUIMTE/LAQV, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre, 689 Porto, Portugal
| | - Susana Soares
- REQUIMTE/LAQV, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre, 689 Porto, Portugal
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Grahl MVC, Lopes FC, Martinelli AHS, Carlini CR, Fruttero LL. Structure-Function Insights of Jaburetox and Soyuretox: Novel Intrinsically Disordered Polypeptides Derived from Plant Ureases. Molecules 2020; 25:molecules25225338. [PMID: 33207637 PMCID: PMC7696265 DOI: 10.3390/molecules25225338] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 11/05/2020] [Accepted: 11/06/2020] [Indexed: 12/24/2022] Open
Abstract
Intrinsically disordered proteins (IDPs) and intrinsically disordered regions (IDRs) do not have a stable 3D structure but still have important biological activities. Jaburetox is a recombinant peptide derived from the jack bean (Canavalia ensiformis) urease and presents entomotoxic and antimicrobial actions. The structure of Jaburetox was elucidated using nuclear magnetic resonance which reveals it is an IDP with small amounts of secondary structure. Different approaches have demonstrated that Jaburetox acquires certain folding upon interaction with lipid membranes, a characteristic commonly found in other IDPs and usually important for their biological functions. Soyuretox, a recombinant peptide derived from the soybean (Glycine max) ubiquitous urease and homologous to Jaburetox, was also characterized for its biological activities and structural properties. Soyuretox is also an IDP, presenting more secondary structure in comparison with Jaburetox and similar entomotoxic and fungitoxic effects. Moreover, Soyuretox was found to be nontoxic to zebra fish, while Jaburetox was innocuous to mice and rats. This profile of toxicity affecting detrimental species without damaging mammals or the environment qualified them to be used in biotechnological applications. Both peptides were employed to develop transgenic crops and these plants were active against insects and nematodes, unveiling their immense potentiality for field applications.
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Affiliation(s)
- Matheus V. Coste Grahl
- Graduate Program in Medicine and Health Sciences, Brain Institute of Rio Grande do Sul (InsCer), Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre CEP 90610-000, Brazil;
| | - Fernanda Cortez Lopes
- Graduate Program in Cellular and Molecular Biology, Center of Biotechnology, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500, Building 43431, Porto Alegre CEP 91501-970, RS, Brazil;
| | - Anne H. Souza Martinelli
- Department of Biophysics & Deparment of Molecular Biology and Biotechnology-Biosciences Institute (IB), Universidade Federal do Rio Grande do Sul, UFRGS, Porto Alegre 91501-970, RS, Brazil;
| | - Celia R. Carlini
- Graduate Program in Medicine and Health Sciences, Brain Institute of Rio Grande do Sul (InsCer), Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre CEP 90610-000, Brazil;
- Brain Institute and School of Medicine, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre 90610-000, RS, Brazil
- Correspondence: (C.R.C.); (L.L.F.); Tel.: +55-51-3320-3485 (C.R.C.); +54-351-535-3850 (L.L.F.)
| | - Leonardo L. Fruttero
- Departamento de Bioquímica Clínica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba CP 5000, Argentina
- Centro de Investigaciones en Bioquímica Clínica e Inmunología (CIBICI), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Córdoba CP 5000, Argentina
- Correspondence: (C.R.C.); (L.L.F.); Tel.: +55-51-3320-3485 (C.R.C.); +54-351-535-3850 (L.L.F.)
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Lachowicz JI, Szczepski K, Scano A, Casu C, Fais S, Orrù G, Pisano B, Piras M, Jaremko M. The Best Peptidomimetic Strategies to Undercover Antibacterial Peptides. Int J Mol Sci 2020; 21:E7349. [PMID: 33027928 PMCID: PMC7583890 DOI: 10.3390/ijms21197349] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 09/23/2020] [Accepted: 09/25/2020] [Indexed: 02/05/2023] Open
Abstract
Health-care systems that develop rapidly and efficiently may increase the lifespan of humans. Nevertheless, the older population is more fragile, and is at an increased risk of disease development. A concurrently growing number of surgeries and transplantations have caused antibiotics to be used much more frequently, and for much longer periods of time, which in turn increases microbial resistance. In 1945, Fleming warned against the abuse of antibiotics in his Nobel lecture: "The time may come when penicillin can be bought by anyone in the shops. Then there is the danger that the ignorant man may easily underdose himself and by exposing his microbes to non-lethal quantities of the drug make them resistant". After 70 years, we are witnessing the fulfilment of Fleming's prophecy, as more than 700,000 people die each year due to drug-resistant diseases. Naturally occurring antimicrobial peptides protect all living matter against bacteria, and now different peptidomimetic strategies to engineer innovative antibiotics are being developed to defend humans against bacterial infections.
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Affiliation(s)
- Joanna Izabela Lachowicz
- Department of Medical Sciences and Public Health, University of Cagliari, Cittadella Universitaria, 09042 Monserrato, Italy; (B.P.); (M.P.)
| | - Kacper Szczepski
- Division of Biological and Environmental Sciences and Engineering (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia;
| | - Alessandra Scano
- Department of Surgical Science, OBL Oral Biotechnology Laboratory, University of Cagliari, 09124 Cagliari, Italy; (A.S.); (C.C.); (S.F.); (G.O.)
| | - Cinzia Casu
- Department of Surgical Science, OBL Oral Biotechnology Laboratory, University of Cagliari, 09124 Cagliari, Italy; (A.S.); (C.C.); (S.F.); (G.O.)
| | - Sara Fais
- Department of Surgical Science, OBL Oral Biotechnology Laboratory, University of Cagliari, 09124 Cagliari, Italy; (A.S.); (C.C.); (S.F.); (G.O.)
| | - Germano Orrù
- Department of Surgical Science, OBL Oral Biotechnology Laboratory, University of Cagliari, 09124 Cagliari, Italy; (A.S.); (C.C.); (S.F.); (G.O.)
| | - Barbara Pisano
- Department of Medical Sciences and Public Health, University of Cagliari, Cittadella Universitaria, 09042 Monserrato, Italy; (B.P.); (M.P.)
| | - Monica Piras
- Department of Medical Sciences and Public Health, University of Cagliari, Cittadella Universitaria, 09042 Monserrato, Italy; (B.P.); (M.P.)
| | - Mariusz Jaremko
- Division of Biological and Environmental Sciences and Engineering (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia;
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Boroumand M, Iavarone F, Manconi B, Pieroni L, Greco V, Vento G, Tirone C, Desiderio C, Fiorita A, Faa G, Messana I, Cabras T, Olianas A, Castagnola M. HPLC-ESI-MS top-down analysis of salivary peptides of preterm newborns evidenced high activity of some exopeptidases and convertases during late fetal development. Talanta 2020; 222:121429. [PMID: 33167196 DOI: 10.1016/j.talanta.2020.121429] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 07/13/2020] [Accepted: 07/16/2020] [Indexed: 11/29/2022]
Abstract
To have information on the proteolytic activity of convertases and exo-peptidases on human salivary proteins, this study investigated the relative amounts of the truncated proteoforms in the saliva of preterm newborns and compared them with the relative amounts measured in saliva of at-term newborns, of babies (0-10 years old) and of adults. Results indicated that convertase(s), acting on acidic proline-rich proteins and histatin 3, and carboxypeptidase(s) acting on acidic proline-rich proteins, P-C peptide, histatin 6 and statherin were many folds more active in preterm newborns than in the other groups. Conversely, the aminopeptidase responsible for the removal of the N-terminal Asp residue of statherin was not active in preterm newborns, becoming active only several months after the normal term of delivery. The high activity of convertases determined in preterm newborns suggests that it is required for the molecular events connected to the fetus development, and encourages further studies devoted to the characterization of their specific substrates.
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Affiliation(s)
- Mozhgan Boroumand
- Laboratorio di Proteomica, Centro Europeo di Ricerca Sul Cervello, IRCCS Fondazione Santa Lucia, Roma, Italy.
| | - Federica Iavarone
- Dipartimento di Scienze Biotecnologiche di Base, Cliniche Intensivologiche e Perioperatorie, Università Cattolica Del Sacro Cuore, Roma, Italy; Fondazione Policlinico Universitario "A. Gemelli", IRCCS, Roma, Italy.
| | - Barbara Manconi
- Dipartimento di Scienze Della Vita e Dell'Ambiente, Università di Cagliari, Cagliari, Italy.
| | - Luisa Pieroni
- Laboratorio di Proteomica, Centro Europeo di Ricerca Sul Cervello, IRCCS Fondazione Santa Lucia, Roma, Italy.
| | - Viviana Greco
- Dipartimento di Scienze Biotecnologiche di Base, Cliniche Intensivologiche e Perioperatorie, Università Cattolica Del Sacro Cuore, Roma, Italy; Fondazione Policlinico Universitario "A. Gemelli", IRCCS, Roma, Italy.
| | - Giovanni Vento
- Fondazione Policlinico Universitario "A. Gemelli", IRCCS, Roma, Italy; Divisione di Neonatologia, Dipartimento per La Salute Della Donna e Del Bambino, Università Cattolica Del Sacro Cuore, Roma, Italy.
| | - Chiara Tirone
- Divisione di Neonatologia, Dipartimento per La Salute Della Donna e Del Bambino, Università Cattolica Del Sacro Cuore, Roma, Italy.
| | - Claudia Desiderio
- Istituto di Scienze e Tecnologie Chimiche "Giulio Natta", Consiglio Nazionale Delle Ricerche, Roma, Italy.
| | - Antonella Fiorita
- Fondazione Policlinico Universitario "A. Gemelli", IRCCS, Roma, Italy; Dipartimento di Scienze Dell'Invecchiamento, Neurologiche, Ortopediche e Della Testa e Del Collo, Università Cattolica Del Sacro Cuore, Roma, Italy.
| | - Gavino Faa
- Sezione di Anatomia Patologica, Dipartimento di Scienze Mediche e Sanità Pubblica, University of Cagliari, Cagliari, Italy; Department of Biology, College of Science and Technology, Temple University, Philadelphia, PA, USA.
| | - Irene Messana
- Istituto di Scienze e Tecnologie Chimiche "Giulio Natta", Consiglio Nazionale Delle Ricerche, Roma, Italy.
| | - Tiziana Cabras
- Dipartimento di Scienze Della Vita e Dell'Ambiente, Università di Cagliari, Cagliari, Italy.
| | - Alessandra Olianas
- Dipartimento di Scienze Della Vita e Dell'Ambiente, Università di Cagliari, Cagliari, Italy.
| | - Massimo Castagnola
- Laboratorio di Proteomica, Centro Europeo di Ricerca Sul Cervello, IRCCS Fondazione Santa Lucia, Roma, Italy.
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65
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Zheng Y, Yuan W, Liu H, Huang S, Bian L, Guo R. Injectable supramolecular gelatin hydrogel loading of resveratrol and histatin-1 for burn wound therapy. Biomater Sci 2020; 8:4810-4820. [PMID: 32744545 DOI: 10.1039/d0bm00391c] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Prolonged inflammatory response and insufficient vascularization cause delayed and poor wound healing. In this study, we fabricated a supramolecular host-guest gelatin (HGM) hydrogel loaded with resveratrol (Res) and histatin-1 (His-1) to suppress inflammation and promote vascularization at skin burn wound sites. The HGM hydrogel showed good properties of shear-thinning and injectability, thereby allowing easy in situ injection and fast adaption to irregular wounds. Res and His-1 were demonstrated to enhance angiogenesis in vitro using cell migration and tube formation assays based on human umbilical vein endothelial cells (HUVECs). In an established rat burn wound model, HGM/Res/His-1 hydrogel treatment promoted wound healing by inhibiting expression of the pro-inflammatory factors of interleukin 6 (IL-6), interleukin 1β (IL-1β) and tumor necrosis factor α (TNF-α) and increasing the expression of transforming growth factor β1 (TGF-β1) and platelet endothelial cell adhesion molecule-1 (CD31). HGM/Res/His-1 hydrogel treatment showed comparable efficacy with that of the commercial dressing, Tegaderm™, and therefore shows promising potential for clinical translation.
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Affiliation(s)
- Yuanyuan Zheng
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Guangdong Provincial Engineering and Technological Research Center for Drug Carrier Development, Department of Biomedical Engineering, Jinan University, Guangzhou 510632, China.
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66
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Norris HL, Kumar R, Ong CY, Xu D, Edgerton M. Zinc Binding by Histatin 5 Promotes Fungicidal Membrane Disruption in C. albicans and C. glabrata. J Fungi (Basel) 2020; 6:E124. [PMID: 32751915 PMCID: PMC7559477 DOI: 10.3390/jof6030124] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 07/22/2020] [Accepted: 07/29/2020] [Indexed: 12/20/2022] Open
Abstract
Histatin 5 (Hst 5) is an antimicrobial peptide produced in human saliva with antifungal activity for opportunistic pathogen Candida albicans. Hst 5 binds to multiple cations including dimerization-inducing zinc (Zn2+), although the function of this capability is incompletely understood. Hst 5 is taken up by C. albicans and acts on intracellular targets under metal-free conditions; however, Zn2+ is abundant in saliva and may functionally affect Hst 5. We hypothesized that Zn2+ binding would induce membrane-disrupting pores through dimerization. Through the use of Hst 5 and two derivatives, P113 (AA 4-15 of Hst 5) and Hst 5ΔMB (AA 1-3 and 15-19 mutated to Glu), we determined that Zn2+ significantly increases killing activity of Hst 5 and P113 for both C. albicans and Candida glabrata. Cell association assays determined that Zn2+ did not impact initial surface binding by the peptides, but Zn2+ did decrease cell association due to active peptide uptake. ATP efflux assays with Zn2+ suggested rapid membrane permeabilization by Hst 5 and P113 and that Zn2+ affinity correlates to higher membrane disruption ability. High-performance liquid chromatography (HPLC) showed that the higher relative Zn2+ affinity of Hst 5 likely promotes dimerization. Together, these results suggest peptide assembly into fungicidal pore structures in the presence of Zn2+, representing a novel mechanism of action that has exciting potential to expand the list of Hst 5-susceptible pathogens.
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Affiliation(s)
| | | | | | | | - Mira Edgerton
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, Foster Hall Buffalo, NY 14214, USA; (H.L.N.); (R.K.); (C.Y.O.); (D.X.)
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Akutsu T, Watanabe K. A Proposed Procedure for Discriminating between Nasal Secretion and Saliva by RT-qPCR. Diagnostics (Basel) 2020; 10:E519. [PMID: 32722656 PMCID: PMC7460356 DOI: 10.3390/diagnostics10080519] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 07/23/2020] [Accepted: 07/24/2020] [Indexed: 11/16/2022] Open
Abstract
In forensic casework, nasal secretion can be a good source of DNA. Moreover, saliva can prove useful in cases of sexual assault. However, discriminating between these body fluids is often difficult because of cross-reactivity between them on presumptive and confirmatory tests. Therefore, an RT-qPCR procedure was developed to discriminate between nasal secretion and saliva. Characteristic genes in nasal secretion and/or saliva (BPIFA1, STATH, HTN3, and PRH2) were selected as candidates. Discrimination criteria were established based on the expression levels of these markers in various body fluids. In addition, a flowchart was proposed and used to discriminate among nasal secretion, saliva, and other body fluids in various forensic samples. BPIFA1 was highly expressed in nasal secretion but was also expressed in saliva, semen, and vaginal fluid at trace levels. STATH was expressed in nasal secretion and saliva but not in other body fluids. HTN3 was specifically expressed in most of the saliva samples, as reported previously. Unexpectedly, PRH2 was expressed in only a few saliva samples. Using the proposed criteria and flowchart, nasal secretion and saliva were successfully discriminated among the various body fluids tested. The developed procedure could be useful in forensic casework.
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Affiliation(s)
- Tomoko Akutsu
- National Research Institute of Police Science, 6-3-1 Kashiwanoha, Kashiwa-shi, Chiba 277-0882, Japan;
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68
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Espinosa-Gómez FC, Ruíz-May E, Serio-Silva JC, Chapman CA. Salivary proteome of a Neotropical primate: potential roles in host defense and oral food perception. PeerJ 2020; 8:e9489. [PMID: 32765966 PMCID: PMC7382365 DOI: 10.7717/peerj.9489] [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: 01/10/2020] [Accepted: 06/15/2020] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Saliva contains a very complex mixture of proteins for defense against microbiological pathogens and for oral food perception. Howler monkeys are Neotropical primates that can consume a mostly leaf diet. They are well known to thrive in highly disturbed habitats where they may cope with a diversity of dietary challenges and infection risks. We aimed to describe the salivary proteome of howlers to contribute to better understanding of their physiology. METHODS We analyzed the salivary proteins of wild black howler monkeys (Alouatta pigra), by SDS-PAGE-1-D and Nano LC-MS/MS and categorized them by their function involved in host defense and oral food perception. RESULTS Our proteomic analysis identified 156 proteins in howler saliva including a number of host defense peptides that are the first line of defense in mammals, such as defensin, cathelicidin, dermcidin, and lactotransferrin, and proteins with anti-bacterial, anti-fungal, and anti-viral capacity, such as IgA, IgG, IgM, BPI, salivary heat shock 70 kDa protein, beta-2-microbulin, and protein S-100. We also identified key proteins necessary for taste perception, including salivary carbonic anhydrase VI, cystatin D, IgA, and fatty acid-binding protein. Proteins to detect astringent foods were identifying, including four members of cystatins (A, B, C and D), lactoperoxidase, and histidine-rich proteins. No chitinase and amylase were identified as would be expected because howlers do not eat insects and little starch. These findings provide basic information to future studies in oral biology, ingestive physiology, and physiological ecology of mammals and non-human primates.
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Affiliation(s)
- Fabiola Carolina Espinosa-Gómez
- Department of Anthropology and McGill School of Environment, McGill University, Montreal, Quebec, Canada
- Red de Biología y Conservación de Vertebrados, Instituto de Ecología AC, Xalapa, Veracruz, México
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Popular Autónoma del Estado de Puebla, Puebla, Puebla, México
| | - Eliel Ruíz-May
- Red de Estudios Moleculares Avanzados, Instituto de Ecología AC, Xalapa, Veracruz, México
| | - Juan Carlos Serio-Silva
- Red de Biología y Conservación de Vertebrados, Instituto de Ecología AC, Xalapa, Veracruz, México
| | - Colin A. Chapman
- Department of Anthropology and McGill School of Environment, McGill University, Montreal, Quebec, Canada
- Department of Anthropology, Center for the Advanced Study of Human Paleobiology, George Washington University, Washington DC, Washington DC, United States of America
- School of Life Sciences, University of KwaZulu-Natal, Scottsville, Pietermaritzburg, South Africa
- Shaanxi Key Laboratory for Animal Conservation, Northwest University, Xi’an, Xi’an, China
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69
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Bio- and Nanotechnology as the Key for Clinical Application of Salivary Peptide Histatin: A Necessary Advance. Microorganisms 2020; 8:microorganisms8071024. [PMID: 32664360 PMCID: PMC7409060 DOI: 10.3390/microorganisms8071024] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 07/07/2020] [Accepted: 07/08/2020] [Indexed: 12/14/2022] Open
Abstract
Candida albicans is a common microorganism of human’s microbiota and can be easily found in both respiratory and gastrointestinal tracts as well as in the genitourinary tract. Approximately 30% of people will be infected by C. albicans during their lifetime. Due to its easy adaptation, this microorganism started to present high resistance to antifungal agents which is associated with their indiscriminate use. There are several reports of adaptive mechanisms that this species can present. Some of them are intrinsic alteration in drug targets, secretion of extracellular enzymes to promote host protein degradation and efflux receptors that lead to a diminished action of common antifungal and host’s innate immune response. The current review aims to bring promising alternatives for the treatment of candidiasis caused mainly by C. albicans. One of these alternatives is the use of antifungal peptides (AFPs) from the Histatin family, like histatin-5. Besides that, our focus is to show how nanotechnology can allow the application of these peptides for treatment of this microorganism. In addition, our intention is to show the importance of nanoparticles (NPs) for this purpose, which may be essential in the near future.
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Neshani A, Sedighian H, Mirhosseini SA, Ghazvini K, Zare H, Jahangiri A. Antimicrobial peptides as a promising treatment option against Acinetobacter baumannii infections. Microb Pathog 2020; 146:104238. [PMID: 32387392 DOI: 10.1016/j.micpath.2020.104238] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 04/26/2020] [Accepted: 04/27/2020] [Indexed: 12/18/2022]
Abstract
BACKGROUND With the increasing rate of antibiotic resistance in Acinetobacter, the World Health Organization introduced the carbapenem-resistant isolates in the priority pathogens list for which innovative new treatments are urgently needed. Antimicrobial peptides (AMPs) are one of the antimicrobial agents with high potential to produce new anti-Acinetobacter drugs. This review aims to summarize recent advances and compare AMPs with anti-Acinetobacter baumannii activity. METHODS Active AMPs against Acinetobacter were considered, and essential features, including structure, mechanism of action, anti-A. baumannii potent, and other prominent characteristics, were investigated and compared to each other. In this regard, the Google Scholar search engine and databases of PubMed, Scopus, and Web of Science were used. RESULTS Forty-six anti-Acinetobacter peptides were identified and classified into ten groups: Cathelicidins, Defensins, Frog AMPs, Melittin, Cecropins, Mastoparan, Histatins, Dermcidins, Tachyplesins, and computationally designed AMPs. According to the Minimum Inhibitory Concentration (MIC) reports, six peptides of Melittin, Histatin-8, Omega76, AM-CATH36, Hymenochirin, and Mastoparan have the highest anti-A. baumannii power against sensitive and antibiotic-resistant isolates. All anti-Acinetobacter peptides except Dermcidin have a net positive charge. Most of these peptides have alpha-helical structure; however, β-sheet and other structures have been observed among them. The mechanism of action of these antimicrobial agents is divided into two categories of membrane-based and intracellular target-based attack. CONCLUSION Evidence from this review indicates that AMPs would be likely among the main anti-A. baumannii drugs in the post-antibiotic era. Also, the application of computer science to increase anti-A. baumannii activity and reduce toxicity could be helpful.
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Affiliation(s)
- Alireza Neshani
- Applied Microbiology Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran; Department of Laboratory Sciences, School of Paramedical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran; Antimicrobial Resistance Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hamid Sedighian
- Applied Microbiology Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Seyed Ali Mirhosseini
- Applied Microbiology Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Kiarash Ghazvini
- Antimicrobial Resistance Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hosna Zare
- Antimicrobial Resistance Research Center, Mashhad University of Medical Sciences, Mashhad, Iran; Student Research Committee, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Abolfazl Jahangiri
- Applied Microbiology Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran.
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71
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Gerelli Y, Eriksson Skog A, Jephthah S, Welbourn RJL, Klechikov A, Skepö M. Spontaneous Formation of Cushioned Model Membranes Promoted by an Intrinsically Disordered Protein. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:3997-4004. [PMID: 32212610 PMCID: PMC7311080 DOI: 10.1021/acs.langmuir.0c00120] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
In this article, it is shown that by exposing commonly used lipids for biomembrane mimicking studies, to a solution containing the histidine-rich intrinsically disordered protein histatin 5, a protein cushion spontaneously forms underneath the bilayer. The underlying mechanism is attributed to have an electrostatic origin, and it is hypothesized that the observed behavior is due to proton charge fluctuations promoting attractive electrostatic interactions between the positively charged proteins and the anionic surfaces, with concomitant counterion release. Hence, we anticipate that this novel "green" approach of forming cushioned bilayers can be an important tool to mimic the cell membrane without the disturbance of the solid substrate, thereby achieving a further understanding of protein-cell interactions.
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Affiliation(s)
- Yuri Gerelli
- Partnership
for Soft Condensed Matter, Institut Laue-Langevin, 71 Avenue des Martyrs, 38000 Grenoble, France
- Department
of Life and Environmental Sciences, Polytechnic
University of Marche, 60131 Ancona, Italy
| | - Amanda Eriksson Skog
- Partnership
for Soft Condensed Matter, Institut Laue-Langevin, 71 Avenue des Martyrs, 38000 Grenoble, France
- Division
of Theoretical Chemistry, Department of Chemistry, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Stephanie Jephthah
- Partnership
for Soft Condensed Matter, Institut Laue-Langevin, 71 Avenue des Martyrs, 38000 Grenoble, France
| | - Rebecca J. L. Welbourn
- ISIS
Pulsed Neutron Facility, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, STFC, Didcot, Oxon OX11 0QX, United Kingdom
| | - Alexey Klechikov
- Department
of Physics and Astronomy, Uppsala University, P.O. Box 516, SE-75120 Uppsala, Sweden
| | - Marie Skepö
- Division
of Theoretical Chemistry, Department of Chemistry, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
- LINXS—Lund
Institute of Advanced Neutron and X-ray Science, Scheelevägen 19, SE-233 70 Lund, Sweden
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Shimomura-Kuroki J, Nashida T, Miyagawa Y, Morita T, Hayashi-Sakai S. Analysis of salivary factors related to the oral health status in children. J Oral Sci 2020; 62:226-230. [PMID: 32224574 DOI: 10.2334/josnusd.18-0293] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Early detection of oral disease is important to reduce its severity and increase the likelihood of successful treatment. This study aimed to perform a quantitative assessment of the saliva components as a first stage of the research to screen oral homeostasis. Here, saliva secretions collected from children were evaluated, and their constituents were analyzed to investigate the potential correlations between the buffering capacity and a range of salivary factors. Subjects aged 3-16 years in the primary, mixed, or permanent dentition stage, were selected for this study. The following salivary factors were analyzed: flow rate, total protein, total sugar quantifications, and constituent analyses using RT-PCR and western blotting. The associations between each factor and the buffering capacity were then analyzed using multiple regression analysis. Flow rate, BPIFA2 RNA level, histatin 1 and BPIFB1 protein levels as well as female sex were positively associated with buffering capacity. In contrast, total sugar concentration and MUC7 RNA levels showed a negative relationship with the buffering capacity. Some of these constituents may indicate oral homeostasis and are therefore potential biomarkers of oral health status. These results suggest that the analyses of the correlations between oral homeostasis and salivary factors are an effective strategy for identifying the susceptibility to oral diseases.
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Affiliation(s)
- Junko Shimomura-Kuroki
- Department of Pediatric Dentistry, The Nippon Dental University School of Life Dentistry at Niigata
| | - Tomoko Nashida
- Department of Biochemistry, The Nippon Dental University School of Life Dentistry at Niigata
| | - Yukio Miyagawa
- The Nippon Dental University Graduate School of Life Dentistry at Niigata
| | - Takao Morita
- Department of Biochemistry, The Nippon Dental University School of Life Dentistry at Niigata
| | - Sachiko Hayashi-Sakai
- Division of Oral and Maxillofacial Radiology, Department of Oral Health Science, Course for Oral Life Science, Niigata University Graduate School of Medical and Dental Sciences
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Peptide Self-Assembly Is Linked to Antibacterial, but Not Antifungal, Activity of Histatin 5 Derivatives. mSphere 2020; 5:5/2/e00021-20. [PMID: 32238567 PMCID: PMC7113582 DOI: 10.1128/msphere.00021-20] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Antimicrobial peptides are important modulators of host defense against bacterial, fungal, and viral pathogens in humans and other multicellular organisms. Two converging paradigms point to a link between antimicrobial peptides that self-assemble into amyloid-like nanoassemblies and classical amyloidogenic peptides that often have potent broad-spectrum antimicrobial activity, suggesting that antimicrobial and amyloidogenic peptides may represent two sides of the same coin. Here, we asked if the ability of an antifungal peptide to self-assemble affects its antifungal or antibacterial activity. We found that modifications of classical antifungal peptide derivative allowed it to self-assemble and did not alter its antifungal activity, and yet self-assembly substantially increased the antibacterial activity of the peptide. These results support the idea that peptide self-assembly can enhance antibacterial activities and emphasize a distinction between the action of antifungal peptides and that of antibacterial peptides. Accordingly, we suggest that the possible generality of this distinction should be widely tested. The rise of multidrug-resistant pathogens has awakened interest in new drug candidates such as antimicrobial peptides and their derivatives. Recent work suggests that some antimicrobial peptides have the ability to self-assemble into ordered amyloid-like nanostructures which facilitate their antibacterial activity. Here, we evaluate a histatin-based antimicrobial peptide, and its self-assembling derivative, in the interplay between self-assembly, membrane interactions, and antibacterial and antifungal activities. We demonstrate substantial membrane targeting by both peptides, as well as mechanistic insights into this mode of action, which correlates to their antifungal activity and is not affected by their self-assembling state. The ability to self-assemble does, however, significantly affect peptide antibacterial activity against both Gram-negative and Gram-positive bacteria. These results are surprising and hint at important distinctions between antifungal and antibacterial peptide activities in prokaryotes and eukaryotic microbes. IMPORTANCE Antimicrobial peptides are important modulators of host defense against bacterial, fungal, and viral pathogens in humans and other multicellular organisms. Two converging paradigms point to a link between antimicrobial peptides that self-assemble into amyloid-like nanoassemblies and classical amyloidogenic peptides that often have potent broad-spectrum antimicrobial activity, suggesting that antimicrobial and amyloidogenic peptides may represent two sides of the same coin. Here, we asked if the ability of an antifungal peptide to self-assemble affects its antifungal or antibacterial activity. We found that modifications of classical antifungal peptide derivative allowed it to self-assemble and did not alter its antifungal activity, and yet self-assembly substantially increased the antibacterial activity of the peptide. These results support the idea that peptide self-assembly can enhance antibacterial activities and emphasize a distinction between the action of antifungal peptides and that of antibacterial peptides. Accordingly, we suggest that the possible generality of this distinction should be widely tested.
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Salivary Histatin 1 and 2 Are Targeted to Mitochondria and Endoplasmic Reticulum in Human Cells. Cells 2020; 9:cells9040795. [PMID: 32225006 PMCID: PMC7226139 DOI: 10.3390/cells9040795] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 03/20/2020] [Accepted: 03/25/2020] [Indexed: 01/24/2023] Open
Abstract
Human salivary histatin 1 (Hst1) and Hst2 exhibit a series of cell-activating properties (e.g., promoting adhesion, spreading, migration and metabolic activity of mammalian cells). In contrast, Hst5 shows an anti-fungal property but no cell-activating properties. Previous findings suggest that their uptake and association with subcellular targets may play a determinant role in their functions. In this study, we studied the uptake dynamics and subcellular targets of Hst1, Hst2 and Hst5 in epithelial cells (HO1N1 human buccal carcinoma epithelial cell line). Confocal laser scanning microscopy (CLSM) revealed that fluorescently labeled Hst1 (F-Hst1) was taken up into the intracellular space of epithelial cells. Then, 60 min post-incubation, the total fluorescence of cell-associated F-Hst1, as measured using flow cytometry, was significantly higher compared to those of F-Hst2 and F-Hst5. In contrast, virtually no association occurred using the negative control—scrambled F-Hst1 (F-Hstscr). CLSM images revealed that F-Hst1, 2 and 5 co-localized with mitotrackerTM-labeled mitochondria. In addition, F-Hst1 and F-Hst2 but neither F-Hst5 nor F-Hst1scr co-localized with the ER-trackerTM-labeled endoplasmic reticulum. No co-localization of Hst1, 2 and 5 with lysosomes or the Golgi apparatus was observed. Furthermore, Hst1 and Hst2 but not Hst5 or Hst1scr significantly promoted the metabolic activity of both human epithelial cell lines, HaCaT human keratinocytes and primary human gingival fibroblasts.
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75
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Hyltegren K, Polimeni M, Skepö M, Lund M. Integrating All-Atom and Coarse-Grained Simulations-Toward Understanding of IDPs at Surfaces. J Chem Theory Comput 2020; 16:1843-1853. [PMID: 32036660 DOI: 10.1021/acs.jctc.9b01041] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We present a scheme for transferring conformational degrees of freedom from all-atom (AA) simulations of an intrinsically disordered protein (IDP) to coarse-grained (CG) Monte Carlo (MC) simulations using conformational swap moves. AA simulations of a single histatin 5 peptide in water were used to obtain a structural ensemble, which is reweighted in a CGMC simulation in the presence of a negatively charged surface. For efficient sampling, the AA trajectory was condensed using two approaches: RMSD clustering (based on the root-mean-square difference in atom positions) and a "naı̈ve" truncation, where only every 100th frame of the trajectory was included in the library. The results show that even libraries with few structures well reproduce the radius of gyration and interaction free energy as functions of the distance from the surface. We further observe that the surface slightly promotes the secondary structure of histatin 5 and more so if using explicit surface charges rather than smeared charges.
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Affiliation(s)
- Kristin Hyltegren
- Division of Theoretical Chemistry, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Marco Polimeni
- Division of Theoretical Chemistry, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Marie Skepö
- Division of Theoretical Chemistry, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden.,LINXS-Lund Institute of Advanced Neutron and X-ray Science, Scheelevägen 19, SE-223 70 Lund, Sweden
| | - Mikael Lund
- Division of Theoretical Chemistry, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden.,LINXS-Lund Institute of Advanced Neutron and X-ray Science, Scheelevägen 19, SE-223 70 Lund, Sweden
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76
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Vila T, Sultan AS, Montelongo-Jauregui D, Jabra-Rizk MA. Oral Candidiasis: A Disease of Opportunity. J Fungi (Basel) 2020; 6:jof6010015. [PMID: 31963180 PMCID: PMC7151112 DOI: 10.3390/jof6010015] [Citation(s) in RCA: 161] [Impact Index Per Article: 40.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 01/10/2020] [Accepted: 01/13/2020] [Indexed: 12/14/2022] Open
Abstract
Oral candidiasis, commonly referred to as “thrush,” is an opportunistic fungal infection that commonly affects the oral mucosa. The main causative agent, Candida albicans, is a highly versatile commensal organism that is well adapted to its human host; however, changes in the host microenvironment can promote the transition from one of commensalism to pathogen. This transition is heavily reliant on an impressive repertoire of virulence factors, most notably cell surface adhesins, proteolytic enzymes, morphologic switching, and the development of drug resistance. In the oral cavity, the co-adhesion of C. albicans with bacteria is crucial for its persistence, and a wide range of synergistic interactions with various oral species were described to enhance colonization in the host. As a frequent colonizer of the oral mucosa, the host immune response in the oral cavity is oriented toward a more tolerogenic state and, therefore, local innate immune defenses play a central role in maintaining Candida in its commensal state. Specifically, in addition to preventing Candida adherence to epithelial cells, saliva is enriched with anti-candidal peptides, considered to be part of the host innate immunity. The T helper 17 (Th17)-type adaptive immune response is mainly involved in mucosal host defenses, controlling initial growth of Candida and inhibiting subsequent tissue invasion. Animal models, most notably the mouse model of oropharyngeal candidiasis and the rat model of denture stomatitis, are instrumental in our understanding of Candida virulence factors and the factors leading to host susceptibility to infections. Given the continuing rise in development of resistance to the limited number of traditional antifungal agents, novel therapeutic strategies are directed toward identifying bioactive compounds that target pathogenic mechanisms to prevent C. albicans transition from harmless commensal to pathogen.
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Affiliation(s)
- Taissa Vila
- Department of Oncology and Diagnostic Sciences, School of Dentistry, University of Maryland, Baltimore, MD 21201, USA; (T.V.); (A.S.S.); (D.M.-J.)
| | - Ahmed S. Sultan
- Department of Oncology and Diagnostic Sciences, School of Dentistry, University of Maryland, Baltimore, MD 21201, USA; (T.V.); (A.S.S.); (D.M.-J.)
| | - Daniel Montelongo-Jauregui
- Department of Oncology and Diagnostic Sciences, School of Dentistry, University of Maryland, Baltimore, MD 21201, USA; (T.V.); (A.S.S.); (D.M.-J.)
| | - Mary Ann Jabra-Rizk
- Department of Oncology and Diagnostic Sciences, School of Dentistry, University of Maryland, Baltimore, MD 21201, USA; (T.V.); (A.S.S.); (D.M.-J.)
- Department of Microbiology and Immunology, School of Medicine, University of Maryland, Baltimore, MD 21201, USA
- Correspondence: ; Tel.: +1-410-706-0508; Fax: +1-410-706-0519
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77
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Dawes C, Wong DTW. Role of Saliva and Salivary Diagnostics in the Advancement of Oral Health. J Dent Res 2020; 98:133-141. [PMID: 30782091 DOI: 10.1177/0022034518816961] [Citation(s) in RCA: 92] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The objective of this article was to provide an account of some of the developments related to saliva over the first 100 years of the Journal of Dental Research and to outline some of the many biomarkers identified in saliva in the last few years. The first section covers findings in salivary physiology, biochemistry, calcium phosphate chemistry related to saliva, microbiology, and the role of saliva in maintaining oral health. The second section highlights salivary diagnostics, salivaomics, and saliva exosomics in the context of the emerging theme of personalized and precision medicine.
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Affiliation(s)
- C Dawes
- 1 Department of Oral Biology, Dental College, University of Manitoba, Winnipeg, MB, Canada
| | - D T W Wong
- 2 Center for Oral/Head and Neck Oncology Research, Division of Oral Biology and Medicine, School of Dentistry, University of California, Los Angeles, CA, USA
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78
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Jayakara T, Rekha CV, Annamalai S, Baghkomeh P. Salivary peptide human neutrophil defensin1–3 and its relationship with early childhood caries. Dent Res J (Isfahan) 2020. [DOI: 10.4103/1735-3327.302893] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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79
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Proteomic profile of saliva collected directly from ducts: a systematic review. Clin Oral Investig 2019; 24:559-568. [DOI: 10.1007/s00784-019-03165-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Accepted: 11/21/2019] [Indexed: 01/20/2023]
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80
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Specific metallo-protein interactions and antimicrobial activity in Histatin-5, an intrinsically disordered salivary peptide. Sci Rep 2019; 9:17303. [PMID: 31754129 PMCID: PMC6872563 DOI: 10.1038/s41598-019-52676-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Accepted: 10/10/2019] [Indexed: 02/06/2023] Open
Abstract
Histatin-5 (Hst-5) is an antimicrobial, salivary protein that is involved in the host defense system. Hst-5 has been proposed to bind functionally relevant zinc and copper but presents challenges in structural studies due to its disordered conformation in aqueous solution. Here, we used circular dichroism (CD) and UV resonance Raman (UVRR) spectroscopy to define metallo-Hst-5 interactions in aqueous solution. A zinc-containing Hst-5 sample exhibits shifted Raman bands, relative to bands observed in the absence of zinc. Based on comparison to model compounds and to a family of designed, zinc-binding beta hairpins, the alterations in the Hst-5 UVRR spectrum are attributed to zinc coordination by imidazole side chains. Zinc addition also shifted a tyrosine aromatic ring UVRR band through an electrostatic interaction. Copper addition did not have these effects. A sequence variant, H18A/H19A, was employed; this mutant has less potent antifungal activity, when compared to Hst-5. Zinc addition had only a small effect on the thermal stability of this mutant. Interestingly, both zinc and copper addition shifted histidine UVRR bands in a manner diagnostic for metal coordination. Results obtained with a K13E/R22G mutant were similar to those obtained with wildtype. These experiments show that H18 and H19 contribute to a zinc binding site. In the H18A/H19A mutant the specificity of the copper/zinc binding sites is lost. The experiments implicate specific zinc binding to be important in the antimicrobial activity of Hst-5.
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81
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Ikonomova SP, Moghaddam-Taaheri P, Wang Y, Doolin MT, Stroka KM, Hube B, Karlsson AJ. Effects of histatin 5 modifications on antifungal activity and kinetics of proteolysis. Protein Sci 2019; 29:480-493. [PMID: 31675138 DOI: 10.1002/pro.3767] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 10/07/2019] [Accepted: 10/28/2019] [Indexed: 12/31/2022]
Abstract
Histatin 5 (Hst-5) is an antimicrobial peptide with strong antifungal activity against Candida albicans, an opportunistic pathogen that is a common cause of oral thrush. The peptide is natively secreted by human salivary glands and shows promise as an alternative therapeutic against infections caused by C. albicans. However, Hst-5 can be cleaved and inactivated by a family of secreted aspartic proteases (Saps) produced by C. albicans. Single-residue substitutions can significantly affect the proteolytic resistance of Hst-5 to Saps and its antifungal activity; the K17R substitution increases resistance to proteolysis, while the K11R substitution enhances antifungal activity. In this work, we showed that the positive effects of these two single-residue modifications can be combined in a single peptide, K11R-K17R, with improved proteolytic resistance and antifungal activity. We also investigated the effect of additional single-residue substitutions, with a focus on the effect of addition or removal of negatively charged residues, and found Sap-dependent effects on degradation. Both single- and double-substitutions affected the kinetics of proteolytic degradation of the intact peptide and of the fragments formed during degradation. Our results demonstrate the importance of considering proteolytic stability and not just antimicrobial activity when designing peptides for potential therapeutic applications.
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Affiliation(s)
- Svetlana P Ikonomova
- Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland
| | | | - Yan Wang
- Proteomics Core, University of Maryland, College Park, Maryland
| | - Mary T Doolin
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland
| | - Kimberly M Stroka
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland
| | - Bernhard Hube
- Department of Microbial Pathogenicity Mechanisms, Hans Knöll Institute, Jena, Germany.,Institute of Microbiology, Friedrich Schiller University, Jena, Germany
| | - Amy J Karlsson
- Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland.,Fischell Department of Bioengineering, University of Maryland, College Park, Maryland
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82
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Affiliation(s)
- Taissa Vila
- Department of Oncology and Diagnostic Sciences, Dental School, University of Maryland, Baltimore, United States of America
- * E-mail:
| | - Alexandra M. Rizk
- Department of Oncology and Diagnostic Sciences, Dental School, University of Maryland, Baltimore, United States of America
| | - Ahmed S. Sultan
- Department of Oncology and Diagnostic Sciences, Dental School, University of Maryland, Baltimore, United States of America
| | - Mary Ann Jabra-Rizk
- Department of Oncology and Diagnostic Sciences, Dental School, University of Maryland, Baltimore, United States of America
- Department of Microbiology and Immunology, School of Medicine, University of Maryland, Baltimore, United States of America
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83
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Oshiro KGN, Rodrigues G, Monges BED, Cardoso MH, Franco OL. Bioactive Peptides Against Fungal Biofilms. Front Microbiol 2019; 10:2169. [PMID: 31681179 PMCID: PMC6797862 DOI: 10.3389/fmicb.2019.02169] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Accepted: 09/04/2019] [Indexed: 12/20/2022] Open
Abstract
Infections caused by invasive fungal biofilms have been widely associated with high morbidity and mortality rates, mainly due to the advent of antibiotic resistance. Moreover, fungal biofilms impose an additional challenge, leading to multidrug resistance. This fact, along with the contamination of medical devices and the limited number of effective antifungal agents available on the market, demonstrates the importance of finding novel drug candidates targeting pathogenic fungal cells and biofilms. In this context, an alternative strategy is the use of antifungal peptides (AFPs) against fungal biofilms. AFPs are considered a group of bioactive molecules with broad-spectrum activities and multiple mechanisms of action that have been widely used as template molecules for drug design strategies aiming at greater specificity and biological efficacy. Among the AFP classes most studied in the context of fungal biofilms, defensins, cathelicidins and histatins have been described. AFPs can also act by preventing the formation of fungal biofilms and eradicating preformed biofilms through mechanisms associated with cell wall perturbation, inhibition of planktonic fungal cells’ adhesion onto surfaces, gene regulation and generation of reactive oxygen species (ROS). Thus, considering the critical scenario imposed by fungal biofilms and associated infections and the application of AFPs as a possible treatment, this review will focus on the most effective AFPs described to date, with a core focus on antibiofilm peptides, as well as their efficacy in vivo, application on surfaces and proposed mechanisms of action.
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Affiliation(s)
- Karen G N Oshiro
- Programa de Pós-Graduação em Patologia Molecular, Faculdade de Medicina, Universidade de Brasília, Brasília, Brazil.,S-Inova Biotech, Programa de Pós-Graduação em Biotecnologia, Universidade Católica Dom Bosco, Campo Grande, Brazil
| | - Gisele Rodrigues
- Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Brazil
| | - Bruna Estéfani D Monges
- S-Inova Biotech, Programa de Pós-Graduação em Biotecnologia, Universidade Católica Dom Bosco, Campo Grande, Brazil
| | - Marlon Henrique Cardoso
- S-Inova Biotech, Programa de Pós-Graduação em Biotecnologia, Universidade Católica Dom Bosco, Campo Grande, Brazil.,Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Brazil
| | - Octávio Luiz Franco
- Programa de Pós-Graduação em Patologia Molecular, Faculdade de Medicina, Universidade de Brasília, Brasília, Brazil.,S-Inova Biotech, Programa de Pós-Graduação em Biotecnologia, Universidade Católica Dom Bosco, Campo Grande, Brazil.,Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Brazil
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84
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Evaluation of the Antifungal and Wound-Healing Properties of a Novel Peptide-Based Bioadhesive Hydrogel Formulation. Antimicrob Agents Chemother 2019; 63:AAC.00888-19. [PMID: 31332066 DOI: 10.1128/aac.00888-19] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Accepted: 07/14/2019] [Indexed: 12/25/2022] Open
Abstract
Oral candidiasis (OC) caused by the fungal pathogen Candida albicans is the most common opportunistic infection in immunocompromised populations. The dramatic increase in resistance to common antifungal agents has emphasized the importance of identifying alternative therapeutic options. Antimicrobial peptides have emerged as promising drug candidates due to their antimicrobial properties; specifically, histatin-5 (Hst-5), a peptide naturally produced and secreted by human salivary glands, has demonstrated potent activity against C. albicans However, as we previously demonstrated vulnerability for Hst-5 to proteolysis by C. albicans proteolytic enzymes at specific amino acid residues, a new variant (K11R-K17R) was designed with amino acid substitutions at the identified cleavage sites. The new resistant peptide demonstrated no cytotoxicity to erythrocytes or human oral keratinocytes. To evaluate the potential of the new peptide for clinical application, we utilized our FDA-approved polymer-based bioadhesive hydrogel as a delivery system and developed a therapeutic formulation specifically designed for oral topical application. The new formulation was demonstrated to be effective against C. albicans strains resistant to the traditional antifungals, and the in vitro therapeutic efficacy was found to be comparable to that of the common topical antifungal agents in clinical use. Importantly, in addition to its antifungal properties, our findings also demonstrated that the new peptide variant induces cell proliferation and rapid cell migration of human oral keratinocytes, indicative of wound healing properties. The findings from this study support the progression of the novel formulation as a therapeutic agent against oral candidiasis, as well as a therapeutic modality for promoting wound healing.
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85
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Koehbach J, Craik DJ. The Vast Structural Diversity of Antimicrobial Peptides. Trends Pharmacol Sci 2019; 40:517-528. [DOI: 10.1016/j.tips.2019.04.012] [Citation(s) in RCA: 115] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 04/25/2019] [Accepted: 04/29/2019] [Indexed: 01/08/2023]
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86
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Jourdain M, Velard F, Pierrard L, Sergheraert J, Gangloff SC, Braux J. Cationic antimicrobial peptides and periodontal physiopathology: A systematic review. J Periodontal Res 2019; 54:589-600. [DOI: 10.1111/jre.12676] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 04/15/2019] [Accepted: 05/20/2019] [Indexed: 12/12/2022]
Affiliation(s)
- Marie‐Laure Jourdain
- EA 4691 "Biomatériaux et Inflammation en Site Osseux" (BIOS) Université de Reims‐Champagne‐Ardenne Reims France
- UFR Odontologie Reims France
- Pôle de Médecine Bucco‐Dentaire CHU de Reims Reims France
| | - Frédéric Velard
- EA 4691 "Biomatériaux et Inflammation en Site Osseux" (BIOS) Université de Reims‐Champagne‐Ardenne Reims France
- UFR Odontologie Reims France
| | - Loïc Pierrard
- UFR Odontologie Reims France
- Pôle de Médecine Bucco‐Dentaire CHU de Reims Reims France
| | - Johan Sergheraert
- UFR Odontologie Reims France
- Pôle de Médecine Bucco‐Dentaire CHU de Reims Reims France
| | - Sophie C. Gangloff
- EA 4691 "Biomatériaux et Inflammation en Site Osseux" (BIOS) Université de Reims‐Champagne‐Ardenne Reims France
- UFR Pharmacie Reims France
| | - Julien Braux
- EA 4691 "Biomatériaux et Inflammation en Site Osseux" (BIOS) Université de Reims‐Champagne‐Ardenne Reims France
- UFR Odontologie Reims France
- Pôle de Médecine Bucco‐Dentaire CHU de Reims Reims France
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87
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van Dijk IA, Veerman ECI, Reits EAJ, Bolscher JGM, Stap J. Salivary peptide histatin 1 mediated cell adhesion: a possible role in mesenchymal-epithelial transition and in pathologies. Biol Chem 2019; 399:1409-1419. [PMID: 30138105 DOI: 10.1515/hsz-2018-0246] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 07/31/2018] [Indexed: 12/21/2022]
Abstract
Histatins are histidine-rich peptides present in the saliva of humans and higher primates and have been implicated in the protection of the oral cavity. Histatin 1 is one of the most abundant histatins and recent reports show that it has a stimulating effect on cellular adherence, thereby suggesting a role in maintaining the quality of the epithelial barrier and stimulating mesenchymal-to-epithelial transition. Here we summarize these findings and discuss them in the context of previous reports. The recent findings also provide new insights in the physiological functions of histatin 1, which are discussed here. Furthermore, we put forward a possible role of histatin 1 in various pathologies and its potential function in clinical applications.
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Affiliation(s)
- Irene A van Dijk
- Department of Medical Biology, Academic Medical Center, University of Amsterdam, Meibergdreef 15, NL-1105 AZ 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, NL-1081 AL Amsterdam, The Netherlands
| | - Eric A J Reits
- Department of Oral Biochemistry, Academic Centre for Dentistry Amsterdam, University of Amsterdam and VU University Amsterdam, Gustav Mahlerlaan 3004, NL-1081 AL 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, NL-1081 AL Amsterdam, The Netherlands
| | - Jan Stap
- Department of Medical Biology, Academic Medical Center, University of Amsterdam, Meibergdreef 15, NL-1105 AZ Amsterdam, The Netherlands
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88
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Esteves CV, Campos WGD, Souza MMD, Lourenço SV, Siqueira WL, Lemos-Júnior CA. Diagnostic potential of saliva proteome analysis: a review and guide to clinical practice. Braz Oral Res 2019; 33:e043. [PMID: 31508727 DOI: 10.1590/1807-3107bor-2019.vol33.0043] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Accepted: 04/25/2019] [Indexed: 01/26/2023] Open
Abstract
Proteomic techniques have become popular in medicine and dentistry because of their widespread use in analyzing bodily fluids such as blood, saliva, urine, and gingival crevicular fluids as well as hard tissues such as enamel, dentine, and cementum. This review is a guide to proteomic techniques in general dentistry, summarizing techniques and their clinical application in understanding and diagnosing diseases and their use in identifying biomarkers of various diseases.
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Affiliation(s)
- Camilla Vieira Esteves
- Department of Stomatology, School of Dentistry, Universidade de São Paulo, São Paulo, SP, Brazil
| | | | | | - Silvia Vanessa Lourenço
- Department of General Pathology, School of Dentistry, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Walter Luiz Siqueira
- Schulich School of Medicine & Dentistry, University of Western Ontario, London, ON, Canada
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89
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Kuppusamy R, Willcox M, Black DS, Kumar N. Short Cationic Peptidomimetic Antimicrobials. Antibiotics (Basel) 2019; 8:antibiotics8020044. [PMID: 31003540 PMCID: PMC6628222 DOI: 10.3390/antibiotics8020044] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 04/15/2019] [Accepted: 04/15/2019] [Indexed: 12/28/2022] Open
Abstract
The rapid growth of antimicrobial resistance against several frontline antibiotics has encouraged scientists worldwide to develop new alternatives with unique mechanisms of action. Antimicrobial peptides (AMPs) have attracted considerable interest due to their rapid killing and broad-spectrum activity. Peptidomimetics overcome some of the obstacles of AMPs such as high cost of synthesis, short half-life in vivo due to their susceptibility to proteolytic degradation, and issues with toxicity. This review will examine the development of short cationic peptidomimetics as antimicrobials.
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Affiliation(s)
- Rajesh Kuppusamy
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia.
| | - Mark Willcox
- School of Optometry and Vision Science, University of New South Wales, Sydney, NSW 2052, Australia.
| | - David StC Black
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia.
| | - Naresh Kumar
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia.
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90
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Histatin-1 counteracts the cytotoxic and antimigratory effects of zoledronic acid in endothelial and osteoblast-like cells. J Periodontol 2019; 90:766-774. [DOI: 10.1002/jper.18-0644] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 12/27/2018] [Accepted: 12/28/2018] [Indexed: 12/12/2022]
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91
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The role of natural salivary defences in maintaining a healthy oral microbiota. J Dent 2019; 80 Suppl 1:S3-S12. [DOI: 10.1016/j.jdent.2018.08.010] [Citation(s) in RCA: 151] [Impact Index Per Article: 30.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Accepted: 08/22/2018] [Indexed: 01/19/2023] Open
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92
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Nicola AM, Albuquerque P, Paes HC, Fernandes L, Costa FF, Kioshima ES, Abadio AKR, Bocca AL, Felipe MS. Antifungal drugs: New insights in research & development. Pharmacol Ther 2018; 195:21-38. [PMID: 30347212 DOI: 10.1016/j.pharmthera.2018.10.008] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The need for better antifungal therapy is commonly accepted in view of the high mortality rates associated with systemic infections, the low number of available antifungal classes, their associated toxicity and the increasing number of infections caused by strains with natural or acquired resistance. The urgency to expand the range of therapeutic options for the treatment of fungal infections has led researchers in recent decades to seek alternative antifungal targets when compared to the conventional ones currently used. Although new potential targets are reported, translating the discoveries from bench to bedside is a long process and most of these drugs fail to reach the patients. In this review, we discuss the development of antifungal drugs focusing on the approach of drug repurposing and the search for novel drugs for classical targets, the most recently described gene targets for drug development, the possibilities of immunotherapy using antibodies, cytokines, therapeutic vaccines and antimicrobial peptides.
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Affiliation(s)
| | - Patrícia Albuquerque
- Faculty of Ceilândia, University of Brasília, Brazil; Graduate Programme in Microbial Biology, University of Brasília, Brazil
| | - Hugo Costa Paes
- Division of Clinical Medicine, University of Brasília Medical School, Brazil
| | - Larissa Fernandes
- Faculty of Ceilândia, University of Brasília, Brazil; Graduate Programme in Microbial Biology, University of Brasília, Brazil
| | - Fabricio F Costa
- Graduate Programme in Genomic Science and Biotechnology, Catholic University of Brasília, Brazil; MATTER, Chicago, IL, USA; Cancer Biology and Epigenomics Program, Ann & Robert Lurie Children's Hospital of Chicago Research Center, Northwestern University's Feinberg School of Medicine, Chicago, Illinois, USA
| | - Erika Seki Kioshima
- Department of Clinical Analysis and Biomedicine, State University of Maringá, Paraná, Brazil
| | - Ana Karina Rodrigues Abadio
- School for Applied Social and Agricultural Sciences, State University of Mato Grosso, Nova Mutum Campus, Mato Grosso, Brazil
| | | | - Maria Sueli Felipe
- Graduate Programme in Genomic Science and Biotechnology, Catholic University of Brasília, Brazil; Department of Cell Biology, Institute of Biological Sciences, University of Brasília, Brazil.
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93
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Edens MH, Carpenter MD, Napeñas JJ, Brennan MT. Impact of salivary hypofunction on incidence of orofungal infections with use of topical steroids for management of oral lichen planus and xerostomia. Oral Surg Oral Med Oral Pathol Oral Radiol 2018; 126:501-505. [PMID: 30309830 DOI: 10.1016/j.oooo.2018.06.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 06/22/2018] [Accepted: 06/25/2018] [Indexed: 01/20/2023]
Abstract
OBJECTIVES The aim of this study was to determine if salivary hypofunction increases the incidence of oral fungal infections (OFIs) after topical steroid use for the management of oral lichen planus (OLP). STUDY DESIGN Patients with a diagnosis of OLP, treated for at least 2 weeks with topical steroids, had baseline salivary flow evaluations completed, and had a follow-up visit within 5 weeks of steroids being prescribed were assessed. Patients were evaluated for clinical signs of fungal infection at follow-up visits. RESULTS Forty-Seven patients (91% female) met the inclusion criteria, with 21.3% developing an OFI after topical steroid use. Demographic characteristics, type of OLP, steroid used, and antifungal used did not impact the development of an OFI. The mean stimulated salivary flow was significantly lower in the group that developed an OFI compared with the group that did not develop an OFI (8.31 mL/15 min vs 15.4 mL/15 min, respectively; P = 0.0006). A higher incidence of OFIs occurred in the low stimulated flow group versus the normal flow group (39% vs 4%, respectively). Most patients in the OFI group received a preventative antifungal (90%). CONCLUSIONS OFIs increased after steroid treatment in patients with OLP who had low stimulated salivary flows. Antifungals (90%) were not effective in preventing OFIs in patients with OLP who had salivary hypofunction and were treated with topical steroids.
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Affiliation(s)
- Mary Hil Edens
- Oral Medicine Resident, Department of Oral Medicine, Carolinas Medical Center, Charlotte, NC, USA
| | - Michael D Carpenter
- Research Assistant, Department of Oral Medicine, Carolinas Medical Center, Charlotte, NC, USA
| | - Joel J Napeñas
- Associate Professor, Oral Medicine Residency Director, Department of Oral Medicine, Carolinas Medical Center, Charlotte, NC, USA
| | - Michael T Brennan
- Professor and Department Chair, Department of Oral Medicine, Carolinas Medical Center, Charlotte, NC, USA.
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94
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Su G, Tang F, Chen D, Yu B, Huang Z, Luo Y, Mao X, Zheng P, Yu J, Luo J, He J. Expression, Purification and Characterization of a Novel Antimicrobial Peptide: Gloverin A2 from Bombyx mori. Int J Pept Res Ther 2018. [DOI: 10.1007/s10989-018-9732-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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95
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Pedersen A, Sørensen CE, Proctor GB, Carpenter GH. Salivary functions in mastication, taste and textural perception, swallowing and initial digestion. Oral Dis 2018; 24:1399-1416. [PMID: 29645367 DOI: 10.1111/odi.12867] [Citation(s) in RCA: 119] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Accepted: 04/03/2018] [Indexed: 12/18/2022]
Abstract
Saliva exerts multiple functions in relation to the initial digestive processes taking place in the upper parts of the gastrointestinal tract. Ingestion of food and beverages, in turn, is a strong stimulus for secretion of saliva with a differential composition depending on the neuronal stimulation pattern. This review paper provides insight into the mechanisms by which saliva acts in relation to taste, mastication, bolus formation, enzymatic digestion and swallowing. Also, the protective functions of saliva including maintenance of dental and mucosal integrity will be discussed as they indirectly influence the digestive process. The final part of this study focuses on the implications of xerostomia and salivary gland dysfunction on gastrointestinal functions.
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Affiliation(s)
- Aml Pedersen
- Section 1, Oral Medicine, Oral Pathology & Clinical Oral Physiology, Department of Odontology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - C E Sørensen
- Section of Oral Biochemistry, Cariology & Endodontics, Department of Odontology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - G B Proctor
- Mucosal & Salivary Biology Division, King's College London Dental Institute, Guy's & St Thomas' Hospitals, London, UK
| | - G H Carpenter
- Mucosal & Salivary Biology Division, King's College London Dental Institute, Guy's & St Thomas' Hospitals, London, UK
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96
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Expression in Escherichia coli of novel recombinant hybrid antimicrobial peptide AL32-P113 with enhanced antimicrobial activity in vitro. Gene 2018; 671:1-9. [PMID: 29859288 DOI: 10.1016/j.gene.2018.05.106] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 05/25/2018] [Accepted: 05/29/2018] [Indexed: 01/22/2023]
Abstract
Antibiotic-resistant pathogens have become a major public health problem worldwide. New discoveries and strategies as regards antibiotic drug development are urgently in need for curing infected patients. Antimicrobial peptides (AMPs) are short cationic peptides that play important roles in innate immune system with a broad spectrum of antimicrobial activity. Recently, hybrid AMPs have been reported to increase antimicrobial activity, stability, and in vivo half-life. In the present study, a gene encoding for AL32-P113 hybrid peptide consisting of two truncated active forms of human LL-37 and histatin-5 (Hst-5) was commercially constructed, cloned into pTXB-1 commercial plasmid, and expressed in E. coli BL21 (DE3). To increase the yield of target protein expression, IPTG concentration, time and temperature were optimized. The results indicate that AL32-P113-intein fusion protein with 33.7 kDa was expressed mostly in inclusion form and estimated to be 20% of the total protein. After chitin affinity purification, 5.7-kDa of AL32-P113 peptide was separated with an average concentration of 12.1 mg per litre of bacterial culture and over 86% purity. The minimum inhibitory concentration (MIC) was evaluated for antimicrobial activity determination of recombinant AL32-P113 compared to synthetic peptides, LL-37, Hst-5, and L31-P113. The results implied that both hybrid peptides exhibited potent antimicrobial activity against gram-negative bacteria and yeast cells whereas the L31-P113 peptide possessed approximately four times greater antimicrobial activity in gram-positive bacteria than parent LL-37. An increasing of undesired hemolysis of these hybrid peptides toward human red cells was also observed when red blood cell hemolytic assay was performed. Several factors including charge and secondary structure predicted by public software were utilized for explanation of the antimicrobial potency of both hybrid peptides. This study proved that hybrid peptides show broader and more potent antimicrobial ability against pathogens and they could be applied as a therapeutic approach for topical treatment of microbial infection in the future.
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97
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Neelabh, Singh K, Rani J. Sequential and Structural Aspects of Antifungal Peptides from Animals, Bacteria and Fungi Based on Bioinformatics Tools. Probiotics Antimicrob Proteins 2018; 8:85-101. [PMID: 27060002 DOI: 10.1007/s12602-016-9212-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Emerging drug resistance varieties and hyper-virulent strains of microorganisms have compelled the scientific fraternity to develop more potent and less harmful therapeutics. Antimicrobial peptides could be one of such therapeutics. This review is an attempt to explore antifungal peptides naturally produced by prokaryotes as well as eukaryotes. They are components of innate immune system providing first line of defence against microbial attacks, especially in eukaryotes. The present article concentrates on types, structures, sources and mode of action of gene-encoded antifungal peptides such as mammalian defensins, protegrins, tritrpticins, histatins, lactoferricins, antifungal peptides derived from birds, amphibians, insects, fungi, bacteria and their synthetic analogues such as pexiganan, omiganan, echinocandins and Novexatin. In silico drug designing, a major revolution in the area of therapeutics, facilitates drug development by exploiting different bioinformatics tools. With this view, bioinformatics tools were used to visualize the structural details of antifungal peptides and to predict their level of similarity. Current practices and recent developments in this area have also been discussed briefly.
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Affiliation(s)
- Neelabh
- Department of Zoology (MMV), Banaras Hindu University, Varanasi, 221005, India
| | - Karuna Singh
- Department of Zoology (MMV), Banaras Hindu University, Varanasi, 221005, India.
| | - Jyoti Rani
- Department of Zoology (MMV), Banaras Hindu University, Varanasi, 221005, India
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98
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Tryptophan-Rich and Proline-Rich Antimicrobial Peptides. Molecules 2018; 23:molecules23040815. [PMID: 29614844 PMCID: PMC6017362 DOI: 10.3390/molecules23040815] [Citation(s) in RCA: 107] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 03/29/2018] [Accepted: 03/30/2018] [Indexed: 12/25/2022] Open
Abstract
Due to the increasing emergence of drug-resistant pathogenic microorganisms, there is a world-wide quest to develop new-generation antibiotics. Antimicrobial peptides (AMPs) are small peptides with a broad spectrum of antibiotic activities against bacteria, fungi, protozoa, viruses and sometimes exhibit cytotoxic activity toward cancer cells. As a part of the native host defense system, most AMPs target the membrane integrity of the microorganism, leading to cell death by lysis. These membrane lytic effects are often toxic to mammalian cells and restrict their systemic application. However, AMPs containing predominantly either tryptophan or proline can kill microorganisms by targeting intracellular pathways and are therefore a promising source of next-generation antibiotics. A minimum length of six amino acids is required for high antimicrobial activity in tryptophan-rich AMPs and the position of these residues also affects their antimicrobial activity. The aromatic side chain of tryptophan is able to rapidly form hydrogen bonds with membrane bilayer components. Proline-rich AMPs interact with the 70S ribosome and disrupt protein synthesis. In addition, they can also target the heat shock protein in target pathogens, and consequently lead to protein misfolding. In this review, we will focus on describing the structures, sources, and mechanisms of action of the aforementioned AMPs.
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99
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Torres P, Castro M, Reyes M, Torres VA. Histatins, wound healing, and cell migration. Oral Dis 2018; 24:1150-1160. [PMID: 29230909 DOI: 10.1111/odi.12816] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Revised: 12/04/2017] [Accepted: 12/05/2017] [Indexed: 12/20/2022]
Abstract
Wounds in the oral mucosa heal faster and more efficiently than those in the skin, although the mechanisms underlying these differences are not completely clear. In the last 10 years, a group of salivary peptides, the histatins, has gained attention on behalf of their ability to improve several phases of the wound-healing process. In addition to their roles as anti-microbial agents and in enamel maintenance, histatins elicit other biological effects, namely by promoting the migration of different cell types contained in the oral mucosa and in non-oral tissues. Histatins, and specifically histatin-1, promote cell adhesion and migration in oral keratinocytes, gingival and dermal fibroblasts, non-oral epithelial cells, and endothelial cells. This is particularly relevant, as histatin-1 promotes the re-epithelialization phase and the angiogenic responses by increasing epithelial and endothelial cell migration. Although the molecular mechanisms associated with histatin-dependent cell migration remain poorly understood, recent studies have pointed to the control of signaling endosomes and the balance of small GTPases. This review aimed to update the literature on the effects of histatins in cell migration, with a focus on wound healing. We will also discuss the consequences that this increasing field will have in disease and therapy design.
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Affiliation(s)
- P Torres
- Faculty of Dentistry, Institute for Research in Dental Sciences, Universidad de Chile, Santiago, Chile
| | - M Castro
- Faculty of Dentistry, Institute for Research in Dental Sciences, Universidad de Chile, Santiago, Chile
| | - M Reyes
- Faculty of Dentistry, Institute for Research in Dental Sciences, Universidad de Chile, Santiago, Chile
| | - V A Torres
- Faculty of Dentistry, Institute for Research in Dental Sciences, Universidad de Chile, Santiago, Chile.,Advanced Center for Chronic Diseases (ACCDiS), Universidad de Chile, Santiago, Chile
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100
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Agrawal P, Bhalla S, Chaudhary K, Kumar R, Sharma M, Raghava GPS. In Silico Approach for Prediction of Antifungal Peptides. Front Microbiol 2018. [PMID: 29535692 PMCID: PMC5834480 DOI: 10.3389/fmicb.2018.00323] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
This paper describes in silico models developed using a wide range of peptide features for predicting antifungal peptides (AFPs). Our analyses indicate that certain types of residue (e.g., C, G, H, K, R, Y) are more abundant in AFPs. The positional residue preference analysis reveals the prominence of the particular type of residues (e.g., R, V, K) at N-terminus and a certain type of residues (e.g., C, H) at C-terminus. In this study, models have been developed for predicting AFPs using a wide range of peptide features (like residue composition, binary profile, terminal residues). The support vector machine based model developed using compositional features of peptides achieved maximum accuracy of 88.78% on the training dataset and 83.33% on independent or validation dataset. Our model developed using binary patterns of terminal residues of peptides achieved maximum accuracy of 84.88% on training and 84.64% on validation dataset. We benchmark models developed in this study and existing methods on a dataset containing compositionally similar antifungal and non-AFPs. It was observed that binary based model developed in this study preforms better than any model/method. In order to facilitate scientific community, we developed a mobile app, standalone and a user-friendly web server ‘Antifp’ (http://webs.iiitd.edu.in/raghava/antifp).
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Affiliation(s)
- Piyush Agrawal
- Council of Scientific and Industrial Research, Institute of Microbial Technology, Chandigarh, India
| | - Sherry Bhalla
- Council of Scientific and Industrial Research, Institute of Microbial Technology, Chandigarh, India
| | - Kumardeep Chaudhary
- Council of Scientific and Industrial Research, Institute of Microbial Technology, Chandigarh, India
| | - Rajesh Kumar
- Council of Scientific and Industrial Research, Institute of Microbial Technology, Chandigarh, India
| | - Meenu Sharma
- Council of Scientific and Industrial Research, Institute of Microbial Technology, Chandigarh, India
| | - Gajendra P S Raghava
- Council of Scientific and Industrial Research, Institute of Microbial Technology, Chandigarh, India.,Center for Computational Biology, Indraprastha Institute of Information Technology, New Delhi, India
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