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Alkan Y, Kaymaz A, Behcet M, Bayrak A. Topical Vancomycin is More Efficient than Povidone-Iodine Treatment in Controlling Bacterial Growth in Methicillin-Resistant Staphylococcus Aureus Keratitis Model in Rabbits. Curr Eye Res 2024; 49:923-929. [PMID: 38708825 DOI: 10.1080/02713683.2024.2349661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 03/04/2024] [Accepted: 04/23/2024] [Indexed: 05/07/2024]
Abstract
To evaluate the efficacy of topical vancomycin and povidone iodine (PI) application on methicillin-resistant Staphylococcus aureus (MRSA) keratitis model in rabbits. MRSA keratitis was induced by injecting 0.1 mL MRSA containing 1000 colony-forming units (CFU) into central cornea of right eyes of 24 New Zealand White rabbits. Animals were divided into four groups (n = 6): control (treated with balanced salt solution), 50 mg/mL topical vancomycin, 5% topical PI, and combination; examined before and after treatment, and corneal tissues were harvested for analysis at 9th hour of treatment. Bacterial load was determined as: 7.63 ± 0.82 log10 CFU/g in control group, 6.95 ± 1.66 log10 CFU/g in PI group, 4.67 ± 0.77 log10 CFU/g in combination group, and 4.33 ± 0.71 log10 CFU/g in vancomycin group (p = 0.001). Median of total clinical score increased significantly from 7 [range: 5-8] to 11.5 [range: 11-15] (p = 0.001) in control group, did not change (6 [range: 5-8] to 7 [range: 5-7]; p = 0.695) in vancomycin group, increased significantly from 7 [range: 5-8] to 12.5 [range: 10-14] (p < 0.001) in PI group, increased significantly from 6.5 [range: 5-7] to 8 [range: 7-9] in combination group (p = 0.002). Post-treatment clinical scores for chemosis, conjunctival injection, iritis, hypopyon, epithelial erosion, and corneal infiltrate were significantly lower in vancomycin-treated groups compared to others (p < 0.05). In PI-treated groups, especially scores for chemosis, conjunctival injection, epithelial erosion and corneal infiltrate were significantly higher than vancomycin (p < 0.05). Topical vancomycin significantly inhibited bacterial growth in MRSA keratitis. However, PI was ineffective in controlling this growth; additionally, exerted toxic effect on ocular surface. When vancomycin was combined with PI, no additional increase in efficacy of treatment was detected compared to only vancomycin.
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Affiliation(s)
- Yunus Alkan
- Department of Ophthalmology, Bolu Abant Izzet Baysal University, Training and Research Hospital, Bolu, Turkey
- Department of Ophthalmology, Derik State Hospital, Mardin, Turkey
| | - Abdulgani Kaymaz
- Department of Ophthalmology, Bolu Abant Izzet Baysal University, Training and Research Hospital, Bolu, Turkey
| | - Mustafa Behcet
- Department of Medical Microbiology, Bolu Abant Izzet Baysal University, Training and Research Hospital, Bolu, Turkey
| | - Abdullah Bayrak
- Department of Ophthalmology, Bolu Abant Izzet Baysal University, Training and Research Hospital, Bolu, Turkey
- Department of Ophthalmology, Macuria-Die Makulaexperten, Meckenbeuren, Germany
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Díaz-Gómez JL, Martín-Estal I, Rivera-Aboytes E, Gaxiola-Muñíz RA, Puente-Garza CA, García-Lara S, Castorena-Torres F. Biomedical applications of synthetic peptides derived from venom of animal origin: A systematic review. Biomed Pharmacother 2024; 170:116015. [PMID: 38113629 DOI: 10.1016/j.biopha.2023.116015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Revised: 12/11/2023] [Accepted: 12/13/2023] [Indexed: 12/21/2023] Open
Abstract
Development of therapeutic agents that have fewer adverse effects and have higher efficacy for diseases, such as cancer, metabolic disorders, neurological diseases, infections, cardiovascular diseases, and respiratory diseases, are required. Recent studies have focused on identifying novel sources for pharmaceutical molecules to develop therapies against these diseases. Among the sources for potentially new therapies, animal venom-derived molecules have generated much interest. Various animal venom-derived proteins and peptides have been isolated, identified, synthesized, and tested to develop drugs. Venom-derived peptides have several biomedical properties, such as proapoptotic, cell migration, and autophagy regulation activities in cancer cell models; induction of vasodilation by nitric oxide and regulation of angiotensin II; modification of insulin response by controlling calcium and potassium channels; regulation of pain receptor activity; modulation of immune cell activity; alteration of motor neuron activity; degradation or inhibition of β-amyloid plaque formation; antibacterial, antifungal, antiviral, and antiprotozoal activities; increase in sperm motility and potentiation of erectile function; reduction of intraocular pressure; anticoagulation, fibrinolytic, and antithrombotic activities; etc. This systematic review compiles these biomedical properties and potential biomedical applications of synthesized animal venom-derived peptides reported in the latest research. In addition, the limitations and areas of opportunity in this research field are discussed so that new studies can be developed based on the data presented.
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Affiliation(s)
- Jorge L Díaz-Gómez
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Ave. Morones Prieto 3000, Monterrey 64710, N.L., Mexico
| | - Irene Martín-Estal
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Ave. Morones Prieto 3000, Monterrey 64710, N.L., Mexico
| | - Elizabeth Rivera-Aboytes
- Tecnologico de Monterrey, Escuela de Ingenieria y Ciencias, Ave. Eugenio Garza Sada 2501, Monterrey 64849, N.L., Mexico
| | - Ramón Alonso Gaxiola-Muñíz
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Ave. Morones Prieto 3000, Monterrey 64710, N.L., Mexico
| | - César A Puente-Garza
- Tecnologico de Monterrey, Escuela de Ingenieria y Ciencias, Ave. Eugenio Garza Sada 2501, Monterrey 64849, N.L., Mexico
| | - Silverio García-Lara
- Tecnologico de Monterrey, Escuela de Ingenieria y Ciencias, Ave. Eugenio Garza Sada 2501, Monterrey 64849, N.L., Mexico
| | - Fabiola Castorena-Torres
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Ave. Morones Prieto 3000, Monterrey 64710, N.L., Mexico.
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3
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Cai W, Shen T, Wang D, Li T, Yu J, Peng C, Tang BZ. Efficient antibacterial AIEgens induced ROS for selective photodynamic treatment of bacterial keratitis. Front Chem 2023; 10:1088935. [PMID: 36688052 PMCID: PMC9846558 DOI: 10.3389/fchem.2022.1088935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 11/28/2022] [Indexed: 01/05/2023] Open
Abstract
Bacterial keratitis (BK) is an acute infection of the cornea, accompanied by uneven epithelium boundaries with stromal ulceration, potentially resulting in vision loss. Topical antibiotic is the regular treatment for BK. However, the incidence rate of multidrug-resistant bacteria limits the application of traditional antibiotics. Therefore, a cationic aggregation-induced emission luminogens (AIEgens) named TTVP is utilized for the treatment of BK. TTVP showed no obvious cytotoxicity in maintaining the normal cell morphology and viability under a limited concentration, and revealed the ability to selectively combine with bacteria in normal ocular environment. After light irradiation, TTVP produced reactive oxygen species (ROS), thus exerting efficient antibacterial ability in vitro. What's more, in rat models of Staphylococcus aureus (S. aureus) infection, the therapeutic intervention of TTVP lessens the degree of corneal opacity and inflammatory infiltration, limiting the spread of inflammation. Besides, TTVP manifested superior antibacterial efficacy than levofloxacin in acute BK, endowing its better vision salvage ability than conventional method. This research demonstrates the efficacy and advantages of TTVP as a photodynamic drug in the treatment of BK and represents its promise in clinical application of ocular infections.
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Affiliation(s)
- Wenting Cai
- Department of Ophthalmology, Shanghai Tenth People’s Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Tianyi Shen
- Department of Ophthalmology, Shanghai Tenth People’s Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Dong Wang
- College of Materials Science and Engineering, Shenzhen University, Shenzhen, China
| | - Tingting Li
- Department of Ophthalmology, Shanghai Tenth People’s Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Jing Yu
- Department of Ophthalmology, Shanghai Tenth People’s Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Chen Peng
- Department of Ophthalmology, Shanghai Tenth People’s Hospital, School of Medicine, Tongji University, Shanghai, China,Department of Radiology, Shanghai Public Health Clinical Center, Fudan University, Shanghai, China,*Correspondence: Chen Peng, ; Ben Zhong Tang,
| | - Ben Zhong Tang
- College of Materials Science and Engineering, Shenzhen University, Shenzhen, China,Shenzhen Institute of Molecular Aggregate Science and Engineering, School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Hong Kong SAR, China,*Correspondence: Chen Peng, ; Ben Zhong Tang,
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4
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Animal venoms as a source of antiviral peptides active against arboviruses: a systematic review. Arch Virol 2022; 167:1763-1772. [PMID: 35723756 DOI: 10.1007/s00705-022-05494-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Accepted: 04/04/2022] [Indexed: 11/02/2022]
Abstract
Arthropod-borne viruses (arboviruses), such as Zika virus (ZIKV), chikungunya virus (CHIKV), dengue virus (DENV), yellow fever virus (YFV), and West Nile virus (WNV), are pathogens of global importance. Therefore, there has been an increasing need for new drugs for the treatment of these viral infections. In this context, antimicrobial peptides (AMPs) obtained from animal venoms stand out as promising compounds because they exhibit strong antiviral activity against emerging arboviral pathogens. Thus, we systematically searched and critically analyzed in vitro and in vivo studies that evaluated the anti-arbovirus effect of peptide derivatives from toxins produced by vertebrates and invertebrates. Thirteen studies that evaluated the antiviral action of 10 peptides against arboviruses were included in this review. The peptides were derived from the venom of scorpions, spiders, wasps, snakes, sea snails, and frogs and were tested against DENV, ZIKV, YFV, WNV, and CHIKV. Despite the high structural variety of the peptides included in this study, their antiviral activity appears to be associated with the presence of positive charges, an excess of basic amino acids (mainly lysine), and a high isoelectric point (above 8). These peptides use different antiviral mechanisms, the most common of which is the inhibition of viral replication, release, entry, or fusion. Moreover, peptides with virucidal and cytoprotective (pre-treatment) effects were also identified. In conclusion, animal-venom-derived peptides stand out as a promising alternative in the search and development of prototype antivirals against arboviruses.
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da Silva CN, Dourado LFN, Silva LM, de Lima AB, de Lima ME, Silva-Cunha A, Fialho SL. Pathophysiological Effects of Lycosa erythrognatha Derived Peptide LyeTxI-b on RKO-AS-45-1 Colorectal Carcinoma Cell Line Using the Chicken Chorioallantoic Membrane Model. Int J Pept Res Ther 2022. [DOI: 10.1007/s10989-021-10349-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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César Moreira Brito J, Gustavo Lima W, Magalhães Resende J, Cristina Sampaio de Assis D, Boff D, Nascimento Cardoso V, Almeida Amaral F, Maria Souza-Fagundes E, Odília Antunes Fernandes S, Elena de Lima M. Pegylated LyeTx I-b peptide is effective against carbapenem-resistant Acinetobacter baumannii in an in vivo model of pneumonia and shows reduced toxicity. Int J Pharm 2021; 609:121156. [PMID: 34624440 DOI: 10.1016/j.ijpharm.2021.121156] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 09/27/2021] [Accepted: 10/03/2021] [Indexed: 10/20/2022]
Abstract
The World Health Organization (WHO) has been warning about the importance of developing new drugs against superbugs. Antimicrobial peptides are an alternative in this context, most of them being involved in innate immunity, acting in various ways, and some even showing synergism with commercial antimicrobial agents. LyeTx I-b is a synthetic peptide derived from native LyeTx I, originally isolated from Lycosa erythrognatha spider venom. Although LyeTx I-b is active against several multidrug-resistant bacteria, it shows some hemolytic and cytotoxic effects. To overcome this hindrance, in the present study we PEGylated LyeTx I-b and evaluated its toxicity and in vitro and in vivo activities on pneumonia caused by multi-resistant Acinetobacter baumannii. PEGylated LyeTx I-b (LyeTx I-bPEG) maintained the same MIC value as the non- PEGylated peptide, showed anti-biofilm activity, synergistic effect with commercial antimicrobial agents, and did not induce resistance. Moreover, in vivo experiments showed its activity against pneumonia. Additionally, LyeTx I-bPEG reduced hemolysis up to 10 times, was approximately 2 times less cytotoxic to HEK-293 cells and 4 times less toxic to mice in acute toxicity models, compared to LyeTx I-b. Our results show LyeTx I-bPEG as a promising antimicrobial candidate, significantly active against pneumonia caused by multidrug-resistant A. baumannii.
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Affiliation(s)
- Júlio César Moreira Brito
- Programa de Inovação Tecnológica e Biofarmacêutica, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil; Fundação Ezequiel Dias, Belo Horizonte, Minas Gerais, Brazil.
| | - William Gustavo Lima
- Laboratório de Radioisótopos, Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Campus Pampulha, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Jarbas Magalhães Resende
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Débora Cristina Sampaio de Assis
- Escola de Veterinária, Departamento de Inspeção Sanitária, Campus Pampulha, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brasil
| | - Daiane Boff
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Valbert Nascimento Cardoso
- Laboratório de Radioisótopos, Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Campus Pampulha, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Flávio Almeida Amaral
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Elaine Maria Souza-Fagundes
- Programa de Inovação Tecnológica e Biofarmacêutica, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
| | - Simone Odília Antunes Fernandes
- Laboratório de Radioisótopos, Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Campus Pampulha, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Maria Elena de Lima
- Programa de Inovação Tecnológica e Biofarmacêutica, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil; Faculdade Santa Casa de Belo Horizonte: Programa de Pós-Graduação em Medicina-Biomedicina, Belo Horizonte, Minas Gerais, Brazil.
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7
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Peng C, Sun W, Zhou C, Qiang S, Jiang M, Lam JWY, Zhao Z, Kwok RTK, Cai W, Tang BZ. Vision redemption: Self-reporting AIEgens for combined treatment of bacterial keratitis. Biomaterials 2021; 279:121227. [PMID: 34736151 DOI: 10.1016/j.biomaterials.2021.121227] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 10/09/2021] [Accepted: 10/22/2021] [Indexed: 12/26/2022]
Abstract
Bacterial keratitis (BK) is one of the most commonly leading causes of visual impairment and blindness worldwide, and suffers the risk of drug-resistant infections due to the abuse of antibiotics. Herein, we report a cationic diphenyl luminogen with aggregation-induced emission called IQ-Cm containing isoquinolinium and coumarin units for theranostic study of BK. IQ-Cm has no obvious cytotoxicity to mammalian cells below a certain concentration, and could preferentially bind to bacteria over mammalian cells. IQ-Cm can be used as a sensitive self-reporting probe to rapidly discriminate live and dead bacteria by the visual emission colors. The intrinsic dark toxicity to bacteria and generation of reactive oxygen species under light irradiation endow IQ-Cm with excellent antibacterial activity in vitro and in BK rabbit models infected with S. aureus. The present study provides a sensitive and efficient theranostic strategy for rapid discrimination of various bacterial states and the combined treatment of BK based on the intrinsic dark antibacterial activity and photodynamic therapy effect.
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Affiliation(s)
- Chen Peng
- Department of Chemical and Biological Engineering, Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Division of Life Science and State Key Laboratory of Molecular Neuroscience, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, 999077, China; Department of Radiology, Shanghai Public Health Clinical Center, Fudan University, Shanghai, 201508, China
| | - Wenjie Sun
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Institute of Advanced Materials for Nano-Bio Applications, School of Ophthalmology and Optometry, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou, 325035, China.
| | - Chengcheng Zhou
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, China
| | - Sujing Qiang
- Department of Ophthalmology, Shanghai Tenth People's Hospital School of Medicine, Tongji University, Shanghai, 200072, China
| | - Meijuan Jiang
- Department of Chemical and Biological Engineering, Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Division of Life Science and State Key Laboratory of Molecular Neuroscience, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, 999077, China
| | - Jacky W Y Lam
- Department of Chemical and Biological Engineering, Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Division of Life Science and State Key Laboratory of Molecular Neuroscience, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, 999077, China
| | - Zheng Zhao
- Shenzhen Institute of Molecular Aggregate Science and Engineering, School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, 518172, China
| | - Ryan T K Kwok
- Department of Chemical and Biological Engineering, Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Division of Life Science and State Key Laboratory of Molecular Neuroscience, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, 999077, China
| | - Wenting Cai
- Department of Ophthalmology, Shanghai Tenth People's Hospital School of Medicine, Tongji University, Shanghai, 200072, China.
| | - Ben Zhong Tang
- Department of Chemical and Biological Engineering, Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Division of Life Science and State Key Laboratory of Molecular Neuroscience, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, 999077, China; Shenzhen Institute of Molecular Aggregate Science and Engineering, School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, 518172, China.
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8
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Fischer T, Riedl R. Paracelsus' legacy in the faunal realm: Drugs deriving from animal toxins. Drug Discov Today 2021; 27:567-575. [PMID: 34678490 DOI: 10.1016/j.drudis.2021.10.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 09/11/2021] [Accepted: 10/12/2021] [Indexed: 12/14/2022]
Abstract
Given the vast number of venomous and poisonous animals, it is surprising that only relatively few animal-derived toxins have been explored and made their way into marketed drugs or are being investigated in ongoing clinical trials. In this review, we highlight marketed drugs deriving from animal toxins as well as ongoing clinical trials and preclinical investigations in the field. We emphasize that more attention should be paid to the rich supply of candidates that nature provides as valuable starting points for addressing serious unmet medical needs.
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Affiliation(s)
- Thomas Fischer
- Center of Organic and Medicinal Chemistry, Institute of Chemistry and Biotechnology, Zurich University of Applied Sciences ZHAW, Einsiedlerstrasse 31, 8820 Wädenswil, Switzerland
| | - Rainer Riedl
- Center of Organic and Medicinal Chemistry, Institute of Chemistry and Biotechnology, Zurich University of Applied Sciences ZHAW, Einsiedlerstrasse 31, 8820 Wädenswil, Switzerland.
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Abdel-Salam MAL, Pinto B, Cassali G, Bueno L, Pêgas G, Oliveira F, Silva I, Klein A, de Souza-Fagundes EM, de Lima ME, Carvalho-Tavares J. LyeTx I-b Peptide Attenuates Tumor Burden and Metastasis in a Mouse 4T1 Breast Cancer Model. Antibiotics (Basel) 2021; 10:1136. [PMID: 34572719 PMCID: PMC8466574 DOI: 10.3390/antibiotics10091136] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 09/11/2021] [Accepted: 09/16/2021] [Indexed: 12/20/2022] Open
Abstract
Cationic anticancer peptides have exhibited potent anti-proliferative and anti-inflammatory effects in neoplastic illness conditions. LyeTx I-b is a synthetic peptide derived from Lycosa erythrognatha spider venom that previously showed antibiotic activity in vitro and in vivo. This study focused on the effects of LyeTxI-b on a 4T1 mouse mammary carcinoma model. Mice with a palpable tumor in the left flank were subcutaneously or intratumorally injected with LyeTx I-b (5 mg/kg), which significantly decreased the tumor volume and metastatic nodules. Histological analyses showed a large necrotic area in treated primary tumors compared to the control. LyeTxI-b reduced tumor growth and lung metastasis in the 4T1 mouse mammary carcinoma model with no signs of toxicity in healthy or cancerous mice. The mechanism of action of LyeTx I-b on the 4T1 mouse mammary carcinoma model was evaluated in vitro and is associated with induction of apoptosis and cell proliferation inhibition. Furthermore, LyeTx I-b seems to be an efficient regulator of the 4T1 tumor microenvironment by modulating several cytokines, such as TGF-β, TNF-α, IL-1β, IL-6, and IL-10, in primary tumor and lung, spleen, and brain. LyeTx I-b also plays a role in leukocytes rolling and adhesion into spinal cord microcirculation and in the number of circulating leukocytes. These data suggest a potent antineoplastic efficacy ofLyeTx I-b.
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Affiliation(s)
- Mostafa A. L. Abdel-Salam
- Programa de Pós-Graduação em Ciências Biológicas: Fisiologia e Farmacologia, Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (M.A.L.A.-S.); (B.P.); (E.M.d.S.-F.)
| | - Bárbara Pinto
- Programa de Pós-Graduação em Ciências Biológicas: Fisiologia e Farmacologia, Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (M.A.L.A.-S.); (B.P.); (E.M.d.S.-F.)
| | - Geovanni Cassali
- Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (G.C.); (G.P.); (F.O.)
| | - Lilian Bueno
- Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil;
| | - Gabriela Pêgas
- Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (G.C.); (G.P.); (F.O.)
| | - Fabrício Oliveira
- Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (G.C.); (G.P.); (F.O.)
| | - Irismara Silva
- Programa de Pós-Graduação em Ciências Biológicas: Fisiologia e Farmacologia, Departamento de Farmacologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (I.S.); (A.K.)
| | - André Klein
- Programa de Pós-Graduação em Ciências Biológicas: Fisiologia e Farmacologia, Departamento de Farmacologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (I.S.); (A.K.)
| | - Elaine Maria de Souza-Fagundes
- Programa de Pós-Graduação em Ciências Biológicas: Fisiologia e Farmacologia, Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (M.A.L.A.-S.); (B.P.); (E.M.d.S.-F.)
| | - Maria Elena de Lima
- Programa de Pós-Graduação em Medicina-Biomedicina, Faculdade Santa Casa de Belo Horizonte, Belo Horizonte 30110-005, Brazil
| | - Juliana Carvalho-Tavares
- Programa de Pós-Graduação em Ciências Biológicas: Fisiologia e Farmacologia, Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (M.A.L.A.-S.); (B.P.); (E.M.d.S.-F.)
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10
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Reis PVM, Lima VM, Souza KR, Cardoso GA, Melo-Braga MN, Santos DM, Verly RM, Pimenta AMC, Dos Santos VL, de Lima ME. Synthetic Peptides Derived From Lycosa Erythrognatha Venom: Interaction With Phospholipid Membranes and Activity Against Resistant Bacteria. Front Mol Biosci 2021; 8:680940. [PMID: 34169094 PMCID: PMC8217815 DOI: 10.3389/fmolb.2021.680940] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Accepted: 05/25/2021] [Indexed: 11/13/2022] Open
Abstract
Superbugs are a public health problem, increasing the need of new drugs and strategies to combat them. Our group has previously identified LyeTxI, an antimicrobial peptide isolated from Lycosa erythrognatha spider venom. From LyeTxI, we synthesized and characterized a derived peptide named LyeTxI-b, which has shown significant in vitro and in vivo activity. In this work, we elucidate the interaction of LyeTxI-b with artificial membranes as well as its effects on resistant strains of bacteria in planktonic conditions or biofilms. Isothermal titration calorimetry revealed that LyeTxI-b interacts more rapidly and with higher intensity with artificial vesicles, showing higher affinity to anionic vesicles, when compared to synthetic LyeTxI. In calcein experiments, LyeTxI-b caused greater levels of vesicle cleavage. Both peptides showed antibacterial activity at concentrations of μmol L−1 against 12 different clinically isolated strains, in planktonic conditions, in a concentration-dependent manner. Furthermore, both peptides elicited a dose-dependent production of reactive oxygen species in methicillin-resistant Staphylococcus aureus. In S. aureus biofilm assay, LyeTxI-b was more potent than LyeTxI. However, none of these peptides reduced Escherichia coli biofilms. Our results show LyeTxI-b as a promising drug against clinically resistant strains, being a template for developing new antibiotics.
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Affiliation(s)
- Pablo V M Reis
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo (USP), São Paulo, Brazil.,Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Vinícius M Lima
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Kelton R Souza
- Departamento de Química, FACET, Universidade Federal dos Vales do Jequitinhonha e Mucuri - Campus JK, Diamantina, Brazil
| | - Gabriele A Cardoso
- Departamento de Química, FACET, Universidade Federal dos Vales do Jequitinhonha e Mucuri - Campus JK, Diamantina, Brazil
| | - Marcella N Melo-Braga
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Daniel M Santos
- Departamento de Bioquímica e Biologia Molecular, Campos Centro Oeste. Universidade Federal de São João Del-Rei, Diamantina, Brazil
| | - Rodrigo M Verly
- Departamento de Química, FACET, Universidade Federal dos Vales do Jequitinhonha e Mucuri - Campus JK, Diamantina, Brazil
| | - Adriano M C Pimenta
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Vera Lúcia Dos Santos
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Maria Elena de Lima
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil.,Faculdade Santa Casa de Belo Horizonte, Programa de Pós-Graduação em Medicina - Biomedicina, Belo Horizonte, Brazil
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11
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Gorman LM, Judge SJ, Harris JB, Caldwell GS. Lesser weever fish (Echiichthys vipera Cuvier, 1829) venom is cardiotoxic but not haemorrhagic. Toxicon 2021; 194:63-69. [PMID: 33631138 DOI: 10.1016/j.toxicon.2021.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Revised: 01/22/2021] [Accepted: 02/15/2021] [Indexed: 11/26/2022]
Abstract
Despite comprising over half of the biodiversity of living venomous vertebrates, fish venoms are comparatively understudied. Venom from the lesser weever fish (Echiichthys vipera syn. Trachinus vipera) has received only cursory attention despite containing one of the most potent venom toxins (trachinine). Literature records are further complicated by early studies combining the venom with that of the related greater weever (Trachinus draco). The current study used a chicken chorioallantoic membrane assay to investigate venom bioactivity following the application of measured quantities of crude venom to a major bilateral vein at 1 cm distance from the heart. The venom had a dose-dependent effect on survival rate and exhibited dose-dependent cardiotoxic properties at day six of development. Crude E. vipera triggered tachycardia at doses of 37.58 and 44.88 μg/μL and bradycardia at 77.4 μg/μL. The three highest doses (65.73, 77.4 and 151.24 μg/μL) caused significant mortality. These data also suggested intra-specific variation in E. vipera venom potency. Unlike a number of other piscine venoms, E. vipera venom was not haemorrhagic at the concentrations assayed.
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Affiliation(s)
- Lucy M Gorman
- School of Natural and Environmental Sciences, Newcastle University, NE1 7RU, UK; Current Address: School of Biological Sciences, Victoria University of Wellington, Wellington, New Zealand
| | - Sarah J Judge
- School of Biomedical, Nutritional and Sport Sciences, Newcastle University, NE2 4HH, UK
| | - John B Harris
- School of Neurology, Neurobiology and Psychiatry, Newcastle University, NE2 4HH, UK
| | - Gary S Caldwell
- School of Natural and Environmental Sciences, Newcastle University, NE1 7RU, UK.
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12
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Lee JW, Somerville T, Kaye SB, Romano V. Staphylococcus aureus Keratitis: Incidence, Pathophysiology, Risk Factors and Novel Strategies for Treatment. J Clin Med 2021; 10:jcm10040758. [PMID: 33668633 PMCID: PMC7918096 DOI: 10.3390/jcm10040758] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 02/09/2021] [Accepted: 02/09/2021] [Indexed: 02/07/2023] Open
Abstract
Bacterial keratitis is a devastating condition that can rapidly progress to serious complications if not treated promptly. Certain causative microorganisms such as Staphylococcus aureus and Pseudomonas aeruginosa are notorious for their resistance to antibiotics. Resistant bacterial keratitis results in poorer outcomes such as scarring and the need for surgical intervention. Thorough understanding of the causative pathogen and its virulence factors is vital for the discovery of novel treatments to avoid further antibiotic resistance. While much has been previously reported on P. aeruginosa, S. aureus has been less extensively studied. This review aims to give a brief overview of S. aureus epidemiology, pathophysiology and clinical characteristics as well as summarise the current evidence for potential novel therapies.
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Affiliation(s)
- Jason W. Lee
- School of Medicine, University of Liverpool, Liverpool L69 3GE, UK;
| | - Tobi Somerville
- Department of Eye and Vision Science, University of Liverpool, Liverpool L7 8TX, UK; (T.S.); (S.B.K.)
- St Paul’s Eye Unit, Royal Liverpool University Hospital, Liverpool L7 8XP, UK
| | - Stephen B. Kaye
- Department of Eye and Vision Science, University of Liverpool, Liverpool L7 8TX, UK; (T.S.); (S.B.K.)
- St Paul’s Eye Unit, Royal Liverpool University Hospital, Liverpool L7 8XP, UK
| | - Vito Romano
- Department of Eye and Vision Science, University of Liverpool, Liverpool L7 8TX, UK; (T.S.); (S.B.K.)
- St Paul’s Eye Unit, Royal Liverpool University Hospital, Liverpool L7 8XP, UK
- Correspondence:
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13
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Fuscaldi LL, de Avelar Júnior JT, dos Santos DM, Boff D, de Oliveira VLS, Gomes KAGG, Cruz RDC, de Oliveira PL, Magalhães PP, Cisalpino PS, Farias LDM, de Souza-Fagundes EM, Delp J, Leist M, Resende JM, Amaral FA, Pimenta AMDC, Fernandes SOA, Cardoso VN, de Lima ME. Shortened derivatives from native antimicrobial peptide LyeTx I: In vitro and in vivo biological activity assessment. Exp Biol Med (Maywood) 2021; 246:414-425. [PMID: 33175610 PMCID: PMC7885047 DOI: 10.1177/1535370220966963] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 09/27/2020] [Indexed: 11/15/2022] Open
Abstract
In the continuing search for novel antibiotics, antimicrobial peptides are promising molecules, due to different mechanisms of action compared to classic antibiotics and to their selectivity for interaction with microorganism cells rather than with mammalian cells. Previously, our research group has isolated the antimicrobial peptide LyeTx I from the venom of the spider Lycosa erythrognatha. Here, we proposed to synthesize three novel shortened derivatives from LyeTx I (LyeTx I mn; LyeTx I mnΔK; LyeTx I mnΔKAc) and to evaluate their toxicity and biological activity as potential antimicrobial agents. Peptides were synthetized by Fmoc strategy and circular dichroism analysis was performed, showing that the three novel shortened derivatives may present membranolytic activity, like the original LyeTx I, once they folded as an alpha helix in 2.2.2-trifluorethanol and sodium dodecyl sulfate. In vitro assays revealed that the shortened derivative LyeTx I mnΔK presents the best score between antimicrobial (↓ MIC) and hemolytic (↑ EC50) activities among the synthetized shortened derivatives, and LUHMES cell-based NeuriTox test showed that it is less neurotoxic than the original LyeTx I (EC50 [LyeTx I mnΔK] ⋙ EC50 [LyeTx I]). In vivo data, obtained in a mouse model of septic arthritis induced by Staphylococcus aureus, showed that LyeTx I mnΔK is able to reduce infection, as demonstrated by bacterial recovery assay (∼10-fold reduction) and scintigraphic imaging (less technetium-99m labeled-Ceftizoxime uptake by infectious site). Infection reduction led to inflammatory process and pain decreases, as shown by immune cells recruitment reduction and threshold nociception increment, when compared to positive control group. Therefore, among the three shortened peptide derivatives, LyeTx I mnΔK is the best candidate as antimicrobial agent, due to its smaller amino acid sequence and toxicity, and its greater biological activity.
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Affiliation(s)
- Leonardo Lima Fuscaldi
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG 31270-901, Brazil
| | - Joaquim Teixeira de Avelar Júnior
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG 31270-901, Brazil
| | - Daniel Moreira dos Santos
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG 31270-901, Brazil
| | - Daiane Boff
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG 31270-901, Brazil
| | - Vívian Louise Soares de Oliveira
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG 31270-901, Brazil
| | - Karla Aparecida Guimarães Gusmão Gomes
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG 31270-901, Brazil
| | - Rosana de Carvalho Cruz
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG 31270-901, Brazil
| | - Patrícia Luciana de Oliveira
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG 31270-901, Brazil
| | - Paula Prazeres Magalhães
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG 31270-901, Brazil
| | - Patricia Silva Cisalpino
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG 31270-901, Brazil
| | - Luiz de Macêdo Farias
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG 31270-901, Brazil
| | - Elaine Maria de Souza-Fagundes
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG 31270-901, Brazil
| | - Johannes Delp
- In Vitro Toxicology and Biomedicine, University of Konstanz, Konstanz 78457, Germany
- Cooperative Doctorate College InViTe, University of Konstanz, Konstanz 78457, Germany
| | - Marcel Leist
- In Vitro Toxicology and Biomedicine, University of Konstanz, Konstanz 78457, Germany
| | - Jarbas Magalhães Resende
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG 31270-901, Brazil
| | - Flávio Almeida Amaral
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG 31270-901, Brazil
| | - Adriano Monteiro de Castro Pimenta
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG 31270-901, Brazil
| | - Simone Odília Antunes Fernandes
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG 31270-901, Brazil
| | - Valbert Nascimento Cardoso
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG 31270-901, Brazil
| | - Maria Elena de Lima
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG 31270-901, Brazil
- Instituto de Ensino e Pesquisa, Santa Casa de Belo Horizonte, R. Domingos Vieira, 590, Belo Horizonte, MG 30150-242, Brazil
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14
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Melo-Braga MN, De Marco Almeida F, Dos Santos DM, de Avelar Júnior JT, Dos Reis PVM, de Lima ME. Antimicrobial Peptides From Lycosidae (Sundevall, 1833) Spiders. Curr Protein Pept Sci 2021; 21:527-541. [PMID: 31951167 DOI: 10.2174/1389203721666200116091911] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 12/31/2019] [Accepted: 12/31/2019] [Indexed: 01/27/2023]
Abstract
Antimicrobial peptides (AMPs) have been found in all organism taxa and may play an essential role as a host defense system. AMPs are organized in various conformations, such as linear peptides, disulfide bond-linked peptides, backbone-linked peptides and circular peptides. AMPs apparently act primarily on the plasma membrane, although an increasing number of works have shown that they may also target various intracellular sites. Spider venoms are rich sources of biomolecules that show several activities, including modulation or blockage of ion channels, anti-insect, anti-cancer, antihypertensive and antimicrobial activities, among others. In spider venoms from the Lycosidae family there are many linear AMPs with a wide range of activities against several microorganisms. Due to these singular activities, some Lycosidae AMPs have been modified to improve or decrease desirable or undesirable effects, respectively. Such modifications, especially with the aim of increasing their antibiotic activity, have led to the filing of many patent applications. This review explores the abundance of Lycosidae venom AMPs and some of their derivatives, and their use as new drug models.
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Affiliation(s)
- Marcella Nunes Melo-Braga
- Departamento de Bioquimica e Imunologia, Instituto de Ciencias Biologicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Flávia De Marco Almeida
- Departamento de Bioquimica e Imunologia, Instituto de Ciencias Biologicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | | | - Joaquim Teixeira de Avelar Júnior
- Departamento de Bioquimica e Imunologia, Instituto de Ciencias Biologicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Pablo Victor Mendes Dos Reis
- Departamento de Bioquimica e Imunologia, Instituto de Ciencias Biologicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Maria Elena de Lima
- Departamento de Bioquimica e Imunologia, Instituto de Ciencias Biologicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.,Santa Casa-Belo Horizonte: Ensino e Pesquisa, Belo Horizonte, MG, Brazil
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15
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Antimicrobial peptides - Advances in development of therapeutic applications. Life Sci 2020; 260:118407. [PMID: 32931796 PMCID: PMC7486823 DOI: 10.1016/j.lfs.2020.118407] [Citation(s) in RCA: 102] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 09/02/2020] [Accepted: 09/07/2020] [Indexed: 02/07/2023]
Abstract
The severe infection is becoming a significant health problem which threaten the lives of patients and the safety and economy of society. In the way of finding new strategy, antimicrobial peptides (AMPs) - an important part of host defense family, emerged with tremendous potential. Up to date, huge numbers of AMPs has been investigated from both natural and synthetic sources showing not only the ability to kill microbial pathogens but also propose other benefits such as wound healing, anti-tumor, immune modulation. In this review, we describe the involvements of AMPs in biological systems and discuss the opportunity in developing AMPs for clinical applications. In the detail, their properties in antibacterial activity is followed by their application in some infection diseases and cancer. The key discussions are the approaches to improve biological activities of AMPs either by modifying chemical structure or incorporating into delivery systems. The new applications and perspectives for the future of AMPs would open the new era of their development.
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16
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da Silva CN, Dourado LFN, de Lima ME, da Silva Cunha-Jr A. PnPP-19 Peptide as a Novel Drug Candidate for Topical Glaucoma Therapy Through Nitric Oxide Release. Transl Vis Sci Technol 2020; 9:33. [PMID: 32855879 PMCID: PMC7422904 DOI: 10.1167/tvst.9.8.33] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Accepted: 05/31/2020] [Indexed: 12/22/2022] Open
Abstract
Purpose Evaluation of PnPP-19 safety and efficacy in reducing the intraocular pressure (IOP) of animals with healthy (normotensive) and ocular hypertensive eyes. PnPP-19 is a synthetic peptide designed from Phoneutria nigriventer spider toxin PnTx2-6. Methods Toxicity tests used chicken chorioallantoic membranes. Electroretinograms (ERGs) were recorded before and after administration of different doses of PnPP-19 on the eyes of Wistar rats. Histological sections of corneas and retinas were prepared. The efficacy of PnPP-19 in reducing IOP was evaluated for normotensive and ocular hypertensive animals using a tonometer. Ocular hypertension was induced in the right eye through injection of hyaluronic acid (HA) into the anterior chamber. ERG was recorded before and after glaucoma induction. The eyes were enucleated, and the corneas and retinas were histologically evaluated. Results PnPP-19 showed no toxicity, being safe for ocular application. A single topical instillation of one eye drop of the peptide solution was able to reduce IOP, both in healthy and ocular hypertensive rats, for 24 hours, without eliciting any apparent toxicity. PnPP-19 is a nitric oxide inducer and the results suggest that it may improve the conventional outflow of aqueous humor (AH), preventing the progression of optic nerve degeneration. Conclusions PnPP-19 has great potential to emerge as a promising drug for the treatment of ocular hypertension. Translational Relevance We regard our findings as exciting progress in translational glaucoma research, combining drug discovery, natural product research, and pharmacology, which may contribute to the establishment of new therapies for the treatment of this disease.
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Affiliation(s)
- Carolina Nunes da Silva
- Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte-MG, Zipcode 31270-901, Brazil
| | | | - Maria Elena de Lima
- Santa Casa de Belo Horizonte: Instituto de Ensino e Pesquisa, Belo Horizonte-MG, Zipcode 30150-240, Brazil
| | - Armando da Silva Cunha-Jr
- Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte-MG, Zipcode 31270-901, Brazil
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17
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Li G, Xu L, Jiang M, Wu X. Eye drops and eye gels of levofloxacin: comparison of ocular absorption characterizations and therapeutic effects in the treatment of bacterial keratitis in rabbits. Drug Dev Ind Pharm 2020; 46:673-681. [PMID: 32233932 DOI: 10.1080/03639045.2020.1750626] [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: 10/24/2022]
Abstract
The aim was to reveal the characteristic profiles of the marketed levofloxacin eye drops (5 mg/ml) and levofloxacin eye gel (3 mg/g) from the pharmacokinetics and pharmacodynamics views of rabbits' eyes. A mild and a heavy bacterial keratitis models in rabbits were established. Different regimens of levofloxacin eye drops and eye gel, including phosphate buffer solution (the PBS group), the 4-Sol + 1-Gel group (rabbits were treated with 4 doses of levofloxacin eye drops and 1 dose levofloxacin eye gel per day), the 3-Sol + 1-Gel group (3 doses drops and 1 dose gel), the 4-Sol group (4 doses drops), the 4-Gel group (4 doses gel), the 3-Sol group (3 doses drops), and the 3-Gel group (3 doses gel), were applied to evaluate their efficacies. The ocular pharmacokinetics of levofloxacin eye drops and gel were also investigated. The results of mild infection groups showed that all treatment regimens significantly relieved the infection symptoms, and the treatment effect followed this order: 4-Gel > 4-Sol + 1-Gel > 3-Sol + 1-Gel > 4-Sol > 3-Gel > 3-Sol. In the heavy infection groups, all the treatment regimens significantly relieved the infection symptoms, and the treatment effect also followed the order with the mild infection results. All treatment regimens lowered the number of corneal colony forming units (CFU). Levofloxacin eye gel significantly increased intraocular penetration in rabbits' eyes. It can be concluded that the levofloxacin eye gel was more effective in treating bacterial keratitis than the levofloxacin eye drops in rabbit keratitis model with a proper treatment regimen such as 4-Gel.
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Affiliation(s)
- Guigang Li
- Department of Ophthalmology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Lingjuan Xu
- Department of Ophthalmology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Menglin Jiang
- Department of Ophthalmology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xianggen Wu
- Department of Pharmacy, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, China.,Key Laboratory of Pharmaceutical Research for Metabolic Diseases, Qingdao University of Science and Technology, Qingdao, China
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18
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Rádis-Baptista G, Konno K. Arthropod Venom Components and Their Potential Usage. Toxins (Basel) 2020; 12:toxins12020082. [PMID: 31991714 PMCID: PMC7076755 DOI: 10.3390/toxins12020082] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Accepted: 01/21/2020] [Indexed: 01/03/2023] Open
Abstract
Arthropods comprise a predominant and well-succeeded phylum of the animal kingdom that evolved and diversified in millions of species grouped in four subphyla, namely, Chelicerata (arachnids), Crustacea, Myriapoda (centipedes), and Hexapoda (insects) [...].
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Affiliation(s)
- Gandhi Rádis-Baptista
- Laboratory of Biochemistry and Biotechnology, Institute for Marine Sciences, Federal University of Ceara, Fortaleza CE 60165-081, Brazil
- Correspondence: (G.R.-B.); (K.K.)
| | - Katsuhiro Konno
- Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama, Toyama 930-0194, Japan
- Correspondence: (G.R.-B.); (K.K.)
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19
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Oliveira Silva R, da Costa BL, da Silva CN, da Mata Martins TM, Nunes Dourado LF, de Goes AM, Lopes MT, Salas CE, Silva-Cunha AD, da Silva FR. The proteolytic fraction from Vasconcellea cundinamarcensis accelerates wound healing after corneal chemical burn in rabbits. Burns 2019; 46:928-936. [PMID: 31722838 DOI: 10.1016/j.burns.2019.10.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2019] [Revised: 09/25/2019] [Accepted: 10/02/2019] [Indexed: 10/25/2022]
Abstract
INTRODUCTION Chemical ocular burns are among the most frequently eye-related injuries, which require immediate and intensive evaluation and care since they may lead to potential complications such as superinfection, corneal perforation, and blindness.Vasconcellea cundinamarcensis, a species from Caricaceae family, contains highly active proteolytic enzymes in its latex that show healing activity in animal models bearing lesions of different etiologies. METHODS We evaluate the ocular toxicity of the proteolytic fraction from V. cundinamarcensis (P1G10) by the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay and Hen's Egg Test-Chorioallantoic Membrane test. The corneal healing property of P1G10 was studied by the ethanol-chemical burn in the rabbit's eyes. RESULTS P1G10 is safe for ocular administration, except when administrated at 10μg/mL. P1G10 at 1μg/mL accelerates the corneal re-epithelization achieving complete wound closure after 72h of chemical burn. Also, P1G10 modulated the inflammatory response and controlled the arrangement of collagen fibers in the stroma, demonstrating its potential corneal healing properties. CONCLUSIONS Our work was the first one to evaluate the ophthalmic application of P1G10. Here we demonstrated that P1G10 is suitable for ocular administration and it has a promising corneal healing activity which may emerge as a new pharmacological tool to the development of a new drug for ocular surface chemical injuries in the future.
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Affiliation(s)
| | - Bruna Lopes da Costa
- Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
| | - Carolina Nunes da Silva
- Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
| | - Thaís Maria da Mata Martins
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
| | | | - Alfredo Miranda de Goes
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
| | - Miriam Teresa Lopes
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
| | - Carlos Edmundo Salas
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
| | - Armando da Silva-Cunha
- Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
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20
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Treatment for chemical burning using liquid crystalline nanoparticles as an ophthalmic delivery system for pirfenidone. Int J Pharm 2019; 568:118466. [DOI: 10.1016/j.ijpharm.2019.118466] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 06/23/2019] [Accepted: 06/24/2019] [Indexed: 12/15/2022]
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