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Omari NE, Chamkhi I, Bakrim S, Aanniz T, Benali T, Akhazzane M, Ullah R, Alotaibi A, Bari A, Elhrech H, Zengin G, Bouyahya A. Biological Properties of Mentha viridis L. Essential Oil and Its Main Monoterpene Constituents. Chem Biodivers 2024:e202401209. [PMID: 38865194 DOI: 10.1002/cbdv.202401209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2024] [Revised: 06/10/2024] [Accepted: 06/11/2024] [Indexed: 06/14/2024]
Abstract
This research aimed to evaluate the antidiabetic, dermatoprotective, and antibacterial activities of Mentha viridis L. essential oil (MVEO) collected in the province of Ouezzane (Northwest Morocco). Gas chromatography-mass spectrometry (GC-MS) analysis revealed that the main constituents of MVEO were carvone (37.26 %), 1,8-cineole (11.82 %), limonene (5.27 %), α-terpineol (4.16 %), and β-caryophyllene (4.04 %). MVEO showed strong inhibitory effects on α-amylase and α-glucosidase activities, exceeding those of acarbose, but weak anti-elastase activity. The main compounds, β-caryophyllene (IC50=79.91±2.24 and 62.08±2.78 μg/mL) and limonene (IC50=90.73±3.47 and 68.98±1, 60 μg/mL), demonstrated the strongest inhibitory effects on both digestive enzymes (α-glucosidase and α-amylase, respectively). In silico investigations, using molecular docking, also showed the inhibitory potential of these bioactive compounds against the enzymes tested. In conclusion, MVEO, due to its main components such as limonene, 1,8-cineole, β-caryophyllene, carvone, and α-terpineol, shows promising prospects for drug discovery and natural therapeutic applications.
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Affiliation(s)
- Nasreddine El Omari
- High Institute of Nursing Professions and Health Techniques of Tetouan, Tetouan, Morocco
| | - Imane Chamkhi
- Geo-Biodiversity and Natural Patrimony Laboratory (GeoBio), Geophysics, Natural Patrimony. Research Center (GEOPAC), Scientific Institute, Mohammed V University in Rabat, Morocco
| | - Saad Bakrim
- Geo-Bio-Environment Engineering and Innovation Laboratory, Molecular Engineering, Biotechnology and Innovation Team, Polydisciplinary Faculty of Taroudant, Ibn Zohr University, Agadir, 80000, Morocco
| | - Tarik Aanniz
- Medical Biotechnology Laboratory, Rabat Medical & Pharmacy School, Mohammed V University in Rabat, Rabat, B.P.-6203, Morocco
| | - Taoufiq Benali
- Environment and Health Team, Polydisciplinary Faculty of Safi, Cadi Ayyad University, Safi, B.P.-4162, Morocco
| | - Mohamed Akhazzane
- Cité de l'innovation, Université Sidi Mohamed Ben Abdellah, Route Immouzer, P.O. Box 2626, Fez, 30000, Morocco
| | - Riaz Ullah
- Medicinal Aromatic and Poisonous Plants Research Center, College of Pharmacy King Saud University Riyadh Saudi Arabia
| | - Amal Alotaibi
- Department of Basic Science, College of Medicine, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Ahmed Bari
- Department of Pharmaceutical Chemistry, College of Pharmacy King Saud University Riyadh Saudi Arabia
| | - Hamza Elhrech
- Laboratory of Human Pathologies Biology, Department of Biology, Faculty of Sciences, Mohammed V University in Rabat, Rabat, 10106, Morocco
| | - Gokhan Zengin
- Department of Biology, Science Faculty, Selcuk University, Konya, Turkey
| | - Abdelhakim Bouyahya
- Laboratory of Human Pathologies Biology, Department of Biology, Faculty of Sciences, Mohammed V University in Rabat, Rabat, 10106, Morocco
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Babbar R, Sharma P, Arora R, Sharma T, Garg M, Singh S, Kumar S, Sindhu RK. Unveiling the phyto-restorative potential of ethereal distillates for atopic dermatitis: an advanced therapeutic approach. JOURNAL OF COMPLEMENTARY & INTEGRATIVE MEDICINE 2024; 0:jcim-2024-0103. [PMID: 38708994 DOI: 10.1515/jcim-2024-0103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Accepted: 04/11/2024] [Indexed: 05/07/2024]
Abstract
Atopic dermatitis is acknowledged as a vital inflammatory disorder associated with the integumentary system of the body and is characterized by the formation of thick reddish-grey scars and erythema formation on skin, prevalent amidst the populace. Numerous synthetic drugs are available for treatment like antihistamines, immunosuppressants, glucocorticoids etc., but contrarily, essential oil therapy is exclusively lime lighted to favour the purpose. The utilization of available engineered drugs, possess the marked adverse effects owing to prolonged duration of therapy and therefore, essential oils are explored well and proved to exhibit the anti-eczematic, anti-inflammatory and antipruritic properties. Ethereal distillates own the assorted and selective therapeutic properties attributable to presence of bioactive compounds liable to treat this torturous and integumentary disorder, likely lavender oil, patchouli oil, frankincense oil etc., have been found to exert their pharmacological actions by impeding the liberation and action of inflammatory mediators and immunological hyperactivities that are engaged in exacerbating this idiopathic illness. The current attempt provided the update with the aim to bring forth the naturally originated treatment that is pertinent to provide the invulnerable therapy by circumventing the noxious symptoms i.e. erythema formation and inflamed lesions.
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Affiliation(s)
- Ritchu Babbar
- Chitkara College of Pharmacy, 154025 Chitkara University , Rajpura, Punjab, India
| | - Parth Sharma
- Chitkara College of Pharmacy, 154025 Chitkara University , Rajpura, Punjab, India
| | - Rashmi Arora
- Chitkara College of Pharmacy, 154025 Chitkara University , Rajpura, Punjab, India
| | - Twinkle Sharma
- Chitkara College of Pharmacy, 154025 Chitkara University , Rajpura, Punjab, India
| | - Madhukar Garg
- Chitkara College of Pharmacy, 154025 Chitkara University , Rajpura, Punjab, India
| | - Sumitra Singh
- Department of Pharmaceutical Sciences, 29051 Guru Jambheshwar University of Science and Technology , Hisar, Haryana, India
| | - Satyender Kumar
- School of Pharmacy, 193167 Sharda University , Greater Noida, Uttar Pradesh, India
| | - Rakesh K Sindhu
- School of Pharmacy, 193167 Sharda University , Greater Noida, Uttar Pradesh, India
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Rogowska-van der Molen MA, Berasategui-Lopez A, Coolen S, Jansen RS, Welte CU. Microbial degradation of plant toxins. Environ Microbiol 2023; 25:2988-3010. [PMID: 37718389 DOI: 10.1111/1462-2920.16507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 09/05/2023] [Indexed: 09/19/2023]
Abstract
Plants produce a variety of secondary metabolites in response to biotic and abiotic stresses. Although they have many functions, a subclass of toxic secondary metabolites mainly serve plants as deterring agents against herbivores, insects, or pathogens. Microorganisms present in divergent ecological niches, such as soil, water, or insect and rumen gut systems have been found capable of detoxifying these metabolites. As a result of detoxification, microbes gain growth nutrients and benefit their herbivory host via detoxifying symbiosis. Here, we review current knowledge on microbial degradation of toxic alkaloids, glucosinolates, terpenes, and polyphenols with an emphasis on the genes and enzymes involved in breakdown pathways. We highlight that the insect-associated microbes might find application in biotechnology and become targets for an alternative microbial pest control strategy.
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Affiliation(s)
- Magda A Rogowska-van der Molen
- Department of Microbiology, Radboud Institute for Biological and Environmental Sciences, Radboud University, Nijmegen, The Netherlands
| | - Aileen Berasategui-Lopez
- Department of Microbiology and Biotechnology, University of Tübingen, Tübingen, Baden-Württemberg, Germany
- Amsterdam Institute for Life and Environment, Section Ecology and Evolution, Vrije Universiteit, Amsterdam, The Netherlands
| | - Silvia Coolen
- Department of Microbiology, Radboud Institute for Biological and Environmental Sciences, Radboud University, Nijmegen, The Netherlands
| | - Robert S Jansen
- Department of Microbiology, Radboud Institute for Biological and Environmental Sciences, Radboud University, Nijmegen, The Netherlands
| | - Cornelia U Welte
- Department of Microbiology, Radboud Institute for Biological and Environmental Sciences, Radboud University, Nijmegen, The Netherlands
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The Role of Quorum Sensing Molecules in Bacterial-Plant Interactions. Metabolites 2023; 13:metabo13010114. [PMID: 36677039 PMCID: PMC9863971 DOI: 10.3390/metabo13010114] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 01/03/2023] [Accepted: 01/07/2023] [Indexed: 01/12/2023] Open
Abstract
Quorum sensing (QS) is a system of communication of bacterial cells by means of chemical signals called autoinducers, which modulate the behavior of entire populations of Gram-negative and Gram-positive bacteria. Three classes of signaling molecules have been recognized, Al-1, Al-2, Al-3, whose functions are slightly different. However, the phenomenon of quorum sensing is not only concerned with the interactions between bacteria, but the whole spectrum of interspecies interactions. A growing number of research results confirm the important role of QS molecules in the growth stimulation and defense responses in plants. Although many of the details concerning the signaling metabolites of the rhizosphere microflora and plant host are still unknown, Al-1 compounds should be considered as important components of bacterial-plant interactions, leading to the stimulation of plant growth and the biological control of phytopathogens. The use of class 1 autoinducers in plants to induce beneficial activity may be a practical solution to improve plant productivity under field conditions. In addition, researchers are also interested in tools that offer the possibility of regulating the activity of autoinducers by means of degrading enzymes or specific inhibitors (QSI). Current knowledge of QS and QSI provides an excellent foundation for the application of research to biopreparations in agriculture, containing a consortia of AHL-producing bacteria and QS inhibitors and limiting the growth of phytopathogenic organisms.
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Exposure of Pseudomonas aeruginosa to Cinnamaldehyde Selects Multidrug Resistant Mutants. Antibiotics (Basel) 2022; 11:antibiotics11121790. [PMID: 36551447 PMCID: PMC9774640 DOI: 10.3390/antibiotics11121790] [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: 11/18/2022] [Revised: 12/07/2022] [Accepted: 12/08/2022] [Indexed: 12/14/2022] Open
Abstract
Cinnamaldehyde (CNA), the main component of cinnamon essential oil, is one of the most active plant compounds against nosocomial pathogen Pseudomonas aeruginosa. Exposure of wild-type strain PA14 (MIC 700 µg/mL) for 5 to 10 days to fixed (900 µg/mL) or increasing (from 900 to 1400 µg/mL) concentrations of this natural antibacterial resulted in emergence of resistant mutants CNA-A1 to A3, and CNA-B1 to B7, respectively. Genome sequencing experiments showed that each of CNA-A1 to A3 mutants differed from PA14 by one SNP, and a slight increase in CNA resistance level (from 700 to 900 µg/mL). By comparison, mutants B1 to B7 were more resistant (up to 1100 µg/mL); each of them harbored multiple SNPs (from 24 to 39) likely as a consequence of alteration of DNA mismatch repair gene mutS. Of the ten mutants selected, eight contained mutations in gene nalC, which indirectly downregulates expression of the operon that codes for multidrug efflux system MexAB-OprM, and showed increased resistance (up to 16-fold versus PA14) to antibiotic molecules exported by the pump, including ß-lactams and fluoroquinolones. Of the six mutants with the highest CNA resistance, five were no longer motile because of alteration of genes flgJ, fliE and/or pilJ genes. Altogether, our data show that P. aeruginosa is able to adapt to strong electrophilic molecules such as CNA by upregulating its intrinsic efflux pump MexAB-OprM, and through less well-characterized pleiotropic changes. Whether multidrug-resistant mutants can emerge in patients using cinnamon essential oil as self-medication needs to be assessed further.
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Guefack MGF, Ngangoue MO, Mbaveng AT, Nayim P, Kuete JRN, Ngaffo CMN, Chi GF, Ngameni B, Ngadjui BT, Kuete V. Antibacterial and antibiotic-potentiation activity of the constituents from aerial part of Donella welwitshii (Sapotaceae) against multidrug resistant phenotypes. BMC Complement Med Ther 2022; 22:194. [PMID: 35858857 PMCID: PMC9301822 DOI: 10.1186/s12906-022-03673-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Accepted: 07/12/2022] [Indexed: 11/11/2022] Open
Abstract
Background The rise of multidrug-resistant (MDR) bacteria is a real public health problem worldwide and is responsible for the increase in hospital infections. Donella welwitschii is a liana or shrub belonging to the family Sapotaceae and traditionally used to cure coughs. Objective This study was conducted with the objective to validate the medicinal properties of this plant, the aerial part was studied for its phytochemical composition using column and PTLC chromatography and exploring its antibacterial and antibiotic-modifying activity as well as those of its phytochemicals. Methods The structures of the compounds were elucidated from their physical and spectroscopic data in conjunction with literature. The antibacterial activity of the isolated metabolites was performed toward a panel of MDR Gram negative and Gram-positive bacteria. The broth micro-dilution method was used to determine antibacterial activities, efflux pump effect using the efflux pump inhibitor (EPI) (phenylalanine-arginine-ß-naphthylamide (PAβN)), as well as the modulating activity of antibiotics. Monitoring the acidification of the bacterial growth medium was used to study the effects of the samples on the bacterial proton-ATPase pumps and cellular ATP production. Results Eleven compounds were isolated including pentacyclic triterpenes, C-glucosyl benzophenones. With a MIC value < 10 μg/mL, diospyric acid (7) significantly inhibited the growth of Escherichia coli AG102, Enterobacter aerogenes ATCC13048, Klebsiella pneumoniae KP55, Providencia stuartii NEA16 and Staphylococcus aureus MRSA3. 28-hydroxy-β-amyrin (8) significantly impaired the growth of Enterobacter aerogenes EA27, Klebsiella pneumoniae ATCC11296 and Staphylococcus aureus MRSA6; and oleanolic acid (9) strongly impaired the growth of Escherichia coli AG 102, Enterobacter aerogenes EA27 and Providencia stuartii PS2636. Diospyric acid (7) and 28-hydroxy-β-amyrin (8) induced perturbation of H+-ATPase pump and inhibition of the cellular ATP production. Moreover, at MIC/2 and MIC/4, compounds 7, 8, and 9 strongly improved the antibacterial activity of norfloxacin, ciprofloxacin and doxycycline with antibiotic-modulating factors ranging between 2 and 64. Conclusion The overall results of the current work demonstrate that diospyric acid (7), 28-hydroxy-β-amyrin (8) and oleanolic acid (9) are the major bioactive constituents of Donella welwitschia towards Gram-negative bacteria expressing MDR phenotypes. Supplementary Information The online version contains supplementary material available at 10.1186/s12906-022-03673-3.
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First Evidence of a Combination of Terpinen-4-ol and α-Terpineol as a Promising Tool against ESKAPE Pathogens. Molecules 2022; 27:molecules27217472. [PMID: 36364298 PMCID: PMC9654757 DOI: 10.3390/molecules27217472] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Revised: 10/31/2022] [Accepted: 10/31/2022] [Indexed: 11/06/2022] Open
Abstract
Antimicrobial resistance is a major public health issue raising growing concern in the face of dwindling response options. It is therefore urgent to find new anti-infective molecules enabling us to fight effectively against ever more numerous bacterial infections caused by ever more antibiotic-resistant bacteria. In this quest for new antibacterials, essential oils (or compounds extracted from essential oils) appear to be a promising therapeutic option. In the present work, we investigate the potential antibacterial synergy between a combination of terpinen-4-ol and α-terpineol (10:1) compared to standard tea tree oil. The minimum inhibitory concentration (MIC) and the minimum bactericidal concentration (MBC) were determined. Then, time kill assays, in vitro cytotoxicity and bactericidal activity on latent bacteria (persisters) were investigated. Finally, an in silico study of the pharmacokinetic parameters of α-terpineol was also performed. Altogether, our data demonstrate that the combination of terpinen-4-ol and α-terpineol might be a precious weapon to address ESKAPE pathogens.
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CYP108N12 initiates p-cymene biodegradation in Rhodococcus globerulus. Arch Biochem Biophys 2022; 730:109410. [PMID: 36155781 DOI: 10.1016/j.abb.2022.109410] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 09/18/2022] [Accepted: 09/19/2022] [Indexed: 11/21/2022]
Abstract
Rhodococcus globerulus (R. globerulus) isolated from soil beneath Eucalyptus sp. was found to live on the monoterpenes 1,8-cineole, p-cymene and (R)- and (S)-limonene as sole sources of carbon and energy. Previous metabolic studies revealed that R. globerulus is capable of living on 1,8-cineole, the main monoterpene component of eucalyptus essential oil through the activity of cytochrome P450cin (CYP176A1) [1]. Genomic sequencing of R. globerulus revealed a novel putative cytochrome P450 (CYP108N12) that shares 48% sequence identity with CYP108A1 (P450terp) from Pseudomonas sp., an α-terpineol hydroxylase. Given the sequence similarity between CYP108N12 and P450terp, it was hypothesised that CYP108N12 may be responsible for initiating the biodegradation of a monoterpene structurally similar to α-terpineol such as (R)-limonene, (S)-limonene or p-cymene. Encoded within the operon containing CYP108N12 were two putative bacterial P450 redox partners and putative alcohol and aldehyde dehydrogenases, suggesting a complete catalytic system for activating these monoterpenes. Binding studies revealed that p-cymene and (R)- and (S)-limonene all bound tightly to CYP108N12 but α-terpineol did not. A catalytically active system was reconstituted using the non-native redox partner putidaredoxin and putidaredoxin reductase that act with CYP101A1 (P450cam) from Pseudomonas. This reconstituted system catalysed the hydroxylation of p-cymene to 4-isopropylbenzyl alcohol, and (R)- and (S)-limonene to (R)- and (S)-perillyl alcohol, respectively. R. globerulus was successfully grown on solely p-cymene, (R)-limonene or (S)-limonene. CYP108N12 was detected when R. globerulus was grown on p-cymene, but not either limonene enantiomer. The native function of CYP108N12 is therefore proposed to be initiation of p-cymene biodegradation by methyl oxidation and is a potentially attractive biocatalyst capable of specific benzylic and allylic hydroxylation.
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Akhmouch AA, Hriouech S, Chefchaou H, Tanghort M, Mzabi A, Chami N, Remmal A. The Combination of Amoxicillin and 1,8-Cineole Improves the Bioavailability and the Therapeutic Effect of Amoxicillin in a Rabbit Model. Antibiotics (Basel) 2022; 11:antibiotics11101294. [PMID: 36289952 PMCID: PMC9598364 DOI: 10.3390/antibiotics11101294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 09/14/2022] [Accepted: 09/15/2022] [Indexed: 12/03/2022] Open
Abstract
In this study, the effectiveness of the combination therapy of 1,8-cineole with amoxicillin (AMX) and clavulanic acid (Clav) was investigated. For this, the pharmacokinetic behaviors of AMX in rabbits were studied after a single oral dose. The animals were divided randomly into two groups: the reference group (received AMX/Clav (50/12.5 mg/kg)) and the test group (received AMX/Clav/1,8-cineole (50/12.5/10 mg/kg)). Blood samples were collected prior to administration and after T1h, T2h, T3h, and T6h post-administration. Plasma concentrations of AMX were quantified using a validated HPLC method. The antibacterial activity of plasma and cerebrospinal fluid (CSF) of treated rabbits was tested against Escherichia coli ESBL-producing a strain by microdilution method. The obtained results showed significant differences in pharmacokinetic parameters between the two groups. The resulting AUC0–6h and Cmax mean values of the AMX reference group were 14.74 µg.h/mL and 3.49 µg/mL, respectively. However, those of the AMX test group were 22.30 µg.h/mL and 5.79 µg/mL, respectively. The results showed that the antibacterial activity of the plasma and CSF test group was significantly higher than that of the reference group. The effectiveness of this combination (Olipen: AMX/Clav/1,8-cineole) was demonstrated by increasing the level of the antibiotic and by improving the bioavailability.
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Affiliation(s)
- Ahmed Amin Akhmouch
- Department of Biology, Faculty of Science Dhar El Mahraz, University Sidi Mohammed Ben Abdellah, Fez 30050, Morocco
| | - Soukayna Hriouech
- Department of Biology, Faculty of Science Dhar El Mahraz, University Sidi Mohammed Ben Abdellah, Fez 30050, Morocco
| | - Hanane Chefchaou
- Systems and Sustainable Environment Laboratory, Private University of Fez UPF, Fez 30000, Morocco
| | - Mariam Tanghort
- Systems and Sustainable Environment Laboratory, Private University of Fez UPF, Fez 30000, Morocco
| | - Aouatef Mzabi
- Systems and Sustainable Environment Laboratory, Private University of Fez UPF, Fez 30000, Morocco
| | - Najat Chami
- Department of Biology, Faculty of Science Dhar El Mahraz, University Sidi Mohammed Ben Abdellah, Fez 30050, Morocco
| | - Adnane Remmal
- Department of Biology, Faculty of Science Dhar El Mahraz, University Sidi Mohammed Ben Abdellah, Fez 30050, Morocco
- Correspondence: ; Tel.: +212-661-53-23-98
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Laborda P, Hernando-Amado S, Martínez JL, Sanz-García F. Antibiotic Resistance in Pseudomonas. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2022; 1386:117-143. [DOI: 10.1007/978-3-031-08491-1_5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Cai ZM, Peng JQ, Chen Y, Tao L, Zhang YY, Fu LY, Long QD, Shen XC. 1,8-Cineole: a review of source, biological activities, and application. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2021; 23:938-954. [PMID: 33111547 DOI: 10.1080/10286020.2020.1839432] [Citation(s) in RCA: 70] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Revised: 10/14/2020] [Accepted: 10/15/2020] [Indexed: 06/11/2023]
Abstract
1,8-Cineole (also known as eucalyptol) is mostly extracted from the essential oils of plants, which showed extensively pharmacological properties including anti-inflammatory and antioxidant mainly via the regulation on NF-κB and Nrf2, and was used for the treatment of respiratory diseases and cardiovascular, etc. Although various administration routes have been used in the application of 1.8-cineole, few formulations have been developed to improve its stability and bioavailability. This review retrospects the researches on the source, biological activities, mechanisms, and application of 1,8-cineole since 2000, which provides a view for the further studies on the application and formulations of 1,8-cineole.
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Affiliation(s)
- Zi-Min Cai
- State Key Laboratory of Functions and Applications of Medicinal Plants, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550014, China
- The High Efficacy Application of Natural Medicinal Resources Engineering Center of Guizhou Province, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, China
- The Key Laboratory of Optimal Utilization of Natural Medicine Resources, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, China
| | - Jian-Qing Peng
- State Key Laboratory of Functions and Applications of Medicinal Plants, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550014, China
- The High Efficacy Application of Natural Medicinal Resources Engineering Center of Guizhou Province, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, China
- The Key Laboratory of Optimal Utilization of Natural Medicine Resources, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, China
| | - Yi Chen
- State Key Laboratory of Functions and Applications of Medicinal Plants, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550014, China
- The High Efficacy Application of Natural Medicinal Resources Engineering Center of Guizhou Province, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, China
- The Key Laboratory of Optimal Utilization of Natural Medicine Resources, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, China
| | - Ling Tao
- State Key Laboratory of Functions and Applications of Medicinal Plants, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550014, China
- The High Efficacy Application of Natural Medicinal Resources Engineering Center of Guizhou Province, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, China
- The Key Laboratory of Optimal Utilization of Natural Medicine Resources, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, China
| | - Yan-Yan Zhang
- State Key Laboratory of Functions and Applications of Medicinal Plants, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550014, China
- The High Efficacy Application of Natural Medicinal Resources Engineering Center of Guizhou Province, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, China
- The Key Laboratory of Optimal Utilization of Natural Medicine Resources, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, China
| | - Ling-Yun Fu
- State Key Laboratory of Functions and Applications of Medicinal Plants, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550014, China
- The High Efficacy Application of Natural Medicinal Resources Engineering Center of Guizhou Province, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, China
- The Key Laboratory of Optimal Utilization of Natural Medicine Resources, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, China
| | - Qing-De Long
- State Key Laboratory of Functions and Applications of Medicinal Plants, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550014, China
- The High Efficacy Application of Natural Medicinal Resources Engineering Center of Guizhou Province, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, China
- The Key Laboratory of Optimal Utilization of Natural Medicine Resources, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, China
| | - Xiang-Chun Shen
- State Key Laboratory of Functions and Applications of Medicinal Plants, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550014, China
- The High Efficacy Application of Natural Medicinal Resources Engineering Center of Guizhou Province, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, China
- The Key Laboratory of Optimal Utilization of Natural Medicine Resources, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, China
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D'agostino M, Tesse N, Lavergne RA, Le Pape P, Frippiat JP, Machouart M, Debourgogne A. In vitro antifungal effect of a plant-based product, CIN-102, on antifungal resistant filamentous fungi and their biofilms. J Med Microbiol 2021; 70. [PMID: 34491156 PMCID: PMC8697507 DOI: 10.1099/jmm.0.001399] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Introduction. The increase of invasive fungal infections (IFIs) and associated treatment failure in populations at risk is driving us to look for new treatments.Hypothesis. The CIN-102 compound, derived from cinnamon essential oil, could be a new antifungal class with an activity, in particular, on strains resistant to current antifungals but also on biofilms, a factor of virulence and resistance of fungi.Aim. The aim of this study is to show the activity of CIN-102 on various strains resistant to current antifungals, on the biofilm and to determine the possibility of resistance induced with this compound.Methodology. We studied the MIC of CIN-102 and of current antifungals (voriconazole and amphotericin B) using CLSI techniques against eight different strains of three genera of filamentous fungi involved in IFIs and having resistance phenotypes to current antifungals. We also determined their effects on biofilm formation, and the induced resistance by voriconazole (VRC) and CIN-102.Results. MIC values determined for CIN-102 were between 62.5 and 250 µg ml-1. We demonstrated the antifungal effect of CIN-102 on biofilm, and more particularly on its formation, with 100 % inhibition achieved for most of the strains. CIN-102 at a sub-inhibitory concentration in the medium did not induce resistance in our strains, even after 30 generations.Conclusions. In this study we show that CIN-102 is effective against resistant filamentous fungi and against biofilm formation. In addition, our strains did not acquire a resistance phenotype against CIN-102 over time, unlike with VRC. CIN-102 is therefore an interesting candidate for the treatment of IFIs, including in cases of therapeutic failure linked to resistance, although further studies on its efficacy, safety and mechanism of action are needed.
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Affiliation(s)
| | - Nicolas Tesse
- Société Septeos, 12 avenue de la grande armée, 75017 Paris, France
| | - Rose Anne Lavergne
- Laboratoire de Parasitologie-Mycologie, Institut de Biologie, CHU de Nantes, France.,Département de Parasitologie et Mycologie Médicale, Université de Nantes, Nantes Atlantique Universités, EA1155-IICiMed, Faculté de Pharmacie, Nantes, France
| | - Patrice Le Pape
- Laboratoire de Parasitologie-Mycologie, Institut de Biologie, CHU de Nantes, France.,Département de Parasitologie et Mycologie Médicale, Université de Nantes, Nantes Atlantique Universités, EA1155-IICiMed, Faculté de Pharmacie, Nantes, France
| | | | - Marie Machouart
- Université de Lorraine, SIMPA, F-54000 Nancy, France.,Université de Lorraine, CHRU-Nancy, laboratoire de Microbiologie, F-54000 Nancy, France
| | - Anne Debourgogne
- Université de Lorraine, SIMPA, F-54000 Nancy, France.,Université de Lorraine, CHRU-Nancy, laboratoire de Microbiologie, F-54000 Nancy, France
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13
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Sanz-García F, Gil-Gil T, Laborda P, Ochoa-Sánchez LE, Martínez JL, Hernando-Amado S. Coming from the Wild: Multidrug Resistant Opportunistic Pathogens Presenting a Primary, Not Human-Linked, Environmental Habitat. Int J Mol Sci 2021; 22:8080. [PMID: 34360847 PMCID: PMC8347278 DOI: 10.3390/ijms22158080] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 07/22/2021] [Accepted: 07/24/2021] [Indexed: 12/24/2022] Open
Abstract
The use and misuse of antibiotics have made antibiotic-resistant bacteria widespread nowadays, constituting one of the most relevant challenges for human health at present. Among these bacteria, opportunistic pathogens with an environmental, non-clinical, primary habitat stand as an increasing matter of concern at hospitals. These organisms usually present low susceptibility to antibiotics currently used for therapy. They are also proficient in acquiring increased resistance levels, a situation that limits the therapeutic options for treating the infections they cause. In this article, we analyse the most predominant opportunistic pathogens with an environmental origin, focusing on the mechanisms of antibiotic resistance they present. Further, we discuss the functions, beyond antibiotic resistance, that these determinants may have in the natural ecosystems that these bacteria usually colonize. Given the capacity of these organisms for colonizing different habitats, from clinical settings to natural environments, and for infecting different hosts, from plants to humans, deciphering their population structure, their mechanisms of resistance and the role that these mechanisms may play in natural ecosystems is of relevance for understanding the dissemination of antibiotic resistance under a One-Health point of view.
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Affiliation(s)
| | | | | | | | - José L. Martínez
- Centro Nacional de Biotecnología, CSIC, 28049 Madrid, Spain; (F.S.-G.); (T.G.-G.); (P.L.); (L.E.O.-S.); (S.H.-A.)
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14
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Tetard A, Foley S, Mislin GLA, Brunel JM, Oliva E, Torrealba Anzola F, Zedet A, Cardey B, Pellequer Y, Ramseyer C, Plésiat P, Llanes C. Negative Impact of Citral on Susceptibility of Pseudomonas aeruginosa to Antibiotics. Front Microbiol 2021; 12:709838. [PMID: 34290691 PMCID: PMC8287888 DOI: 10.3389/fmicb.2021.709838] [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: 05/14/2021] [Accepted: 06/11/2021] [Indexed: 11/13/2022] Open
Abstract
Essential oils (EOs) or their components are widely used by inhalation or nebulization to fight mild respiratory bacterial infections. However, their interaction with antibiotics is poorly known. In this study we evaluated the effects of citral, the main component of lemongrass oil, on in vitro susceptibility of Pseudomonas aeruginosa to antibiotics. Exposure of strain PA14 to subinhibitory concentrations of citral increased expression of operons encoding the multidrug efflux systems MexEF-OprN and MexXY/OprM, and bacterial resistance to anti-pseudomonal antibiotics including imipenem (twofold), gentamicin (eightfold), tobramycin (eightfold), ciprofloxacin (twofold), and colistin (≥128-fold). Use of pump deletion mutants showed that in addition to efflux other mechanisms were involved in this citral-induced phenotype. Determination of Zeta potential suggested that citral impairs the cell surface binding of aminoglycosides and colistin used at low concentrations (≤10 μg/mL). Moreover, experiments based on Raman spectroscopy and high-resolution mass spectrometry demonstrated formation of a Schiff base between the aldehyde group of citral and amino-groups of tobramycin and colistin. Chemical synthesis of tobracitryl, the imine compound resulting from condensation of citral and tobramycin, confirmed the loss of antibiotic activity due to adduct formation. Altogether these data point to the potential risk concern of self-medication with EOs containing citral in patients suffering from P. aeruginosa chronic lung infections and being treated with aerosols of aminoglycoside or colistin.
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Affiliation(s)
- Alexandre Tetard
- UMR CNRS 6249 Chrono-Environnement, Université Bourgogne Franche-Comté, Besançon, France
| | - Sarah Foley
- UMR CNRS 6249 Chrono-Environnement, Université Bourgogne Franche-Comté, Besançon, France
| | - Gaëtan L A Mislin
- CNRS/Université de Strasbourg UMR 7242 Biotechnologie et Signalisation Cellulaire, Illkirch, France
| | - Jean-Michel Brunel
- UMR_MD1, U-1261, Aix Marseille Université, INSERM, SSA, MCT, Marseille, France
| | - Estefania Oliva
- Plateforme d'Analyse Chimique de Strasbourg-Illkirch (PACSI), Faculté de Pharmacie de Strasbourg, Illkirch, France
| | | | - Andy Zedet
- PEPITE EA4267, Université de Bourgogne Franche-Comté, Besançon, France
| | - Bruno Cardey
- UMR CNRS 6249 Chrono-Environnement, Université Bourgogne Franche-Comté, Besançon, France
| | - Yann Pellequer
- PEPITE EA4267, Université de Bourgogne Franche-Comté, Besançon, France
| | - Christophe Ramseyer
- UMR CNRS 6249 Chrono-Environnement, Université Bourgogne Franche-Comté, Besançon, France
| | - Patrick Plésiat
- UMR CNRS 6249 Chrono-Environnement, Université Bourgogne Franche-Comté, Besançon, France.,Centre National de Référence de la Résistance aux Antibiotiques, Centre Hospitalier Universitaire de Besançon, Besançon, France
| | - Catherine Llanes
- UMR CNRS 6249 Chrono-Environnement, Université Bourgogne Franche-Comté, Besançon, France
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15
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Zubrova A, Michalikova K, Semerad J, Strejcek M, Cajthaml T, Suman J, Uhlik O. Biphenyl 2,3-Dioxygenase in Pseudomonas alcaliphila JAB1 Is Both Induced by Phenolics and Monoterpenes and Involved in Their Transformation. Front Microbiol 2021; 12:657311. [PMID: 33995321 PMCID: PMC8119895 DOI: 10.3389/fmicb.2021.657311] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 03/29/2021] [Indexed: 01/09/2023] Open
Abstract
The involvement of bacterial aromatic ring-hydroxylating dioxygenases (ARHDs) in the degradation of aromatic pollutants, such as polychlorinated biphenyls (PCBs), has been well studied. However, there is considerable speculation as to the origin of this ability. One hypothesis is centered on a connection between the ability to degrade aromatic pollutants and the necessity of soil bacteria to cope with and/or utilize secondary plant metabolites (SPMs). To investigate this connection, we researched the involvement of biphenyl 2,3-dioxygenase (BPDO), an ARHD essential for the degradation of PCBs, in the metabolism of SPMs in the soil bacterium Pseudomonas alcaliphila JAB1, a versatile degrader of PCBs. We demonstrated the ability of the strain JAB1 to transform a variety of SPMs, namely the flavonoids apigenin, flavone, flavanone, naringenin, fisetin, quercetin, morin, and catechin, caffeic acid, trans-cinnamic acid, and the monoterpenes (S)-limonene and (R)-carvone. Of those, the transformation of flavone, flavanone, and (S)-limonene was conditioned by the activity of JAB1-borne BPDO and thus was researched in more detail, and we found evidence for the limonene monooxygenase activity of the BPDO. Furthermore, the bphA gene in the strain JAB1 was demonstrated to be induced by a wide range of SPMs, with monoterpenes being the strongest inducers of the SPMs tested. Thus, our findings contribute to the growing body of evidence that ARHDs not only play a role in the catabolism of aromatic pollutants, but also of natural plant-derived aromatics, and this study supports the hypothesis that ARHDs participate in ecological processes mediated by SPMs.
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Affiliation(s)
- Andrea Zubrova
- Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology, University of Chemistry and Technology, Prague, Czechia
| | - Klara Michalikova
- Institute of Microbiology, Academy of Sciences of the Czech Republic, Prague, Czechia
| | - Jaroslav Semerad
- Institute of Microbiology, Academy of Sciences of the Czech Republic, Prague, Czechia
| | - Michal Strejcek
- Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology, University of Chemistry and Technology, Prague, Czechia
| | - Tomas Cajthaml
- Institute of Microbiology, Academy of Sciences of the Czech Republic, Prague, Czechia.,Faculty of Science, Institute for Environmental Studies, Charles University, Prague, Czechia
| | - Jachym Suman
- Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology, University of Chemistry and Technology, Prague, Czechia
| | - Ondrej Uhlik
- Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology, University of Chemistry and Technology, Prague, Czechia
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16
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Ahmed MS, Lauersen KJ, Ikram S, Li C. Efflux Transporters' Engineering and Their Application in Microbial Production of Heterologous Metabolites. ACS Synth Biol 2021; 10:646-669. [PMID: 33751883 DOI: 10.1021/acssynbio.0c00507] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Metabolic engineering of microbial hosts for the production of heterologous metabolites and biochemicals is an enabling technology to generate meaningful quantities of desired products that may be otherwise difficult to produce by traditional means. Heterologous metabolite production can be restricted by the accumulation of toxic products within the cell. Efflux transport proteins (transporters) provide a potential solution to facilitate the export of these products, mitigate toxic effects, and enhance production. Recent investigations using knockout lines, heterologous expression, and expression profiling of transporters have revealed candidates that can enhance the export of heterologous metabolites from microbial cell systems. Transporter engineering efforts have revealed that some exhibit flexible substrate specificity and may have broader application potentials. In this Review, the major superfamilies of efflux transporters, their mechanistic modes of action, selection of appropriate efflux transporters for desired compounds, and potential transporter engineering strategies are described for potential applications in enhancing engineered microbial metabolite production. Future studies in substrate recognition, heterologous expression, and combinatorial engineering of efflux transporters will assist efforts to enhance heterologous metabolite production in microbial hosts.
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Affiliation(s)
- Muhammad Saad Ahmed
- Institute for Synthetic Biosystem/Department of Biochemical Engineering, School of Chemistry and Chemical Engineering, Beijing Institute of Technology (BIT), Beijing 100081, P. R. China
- Department of Biological Sciences, National University of Medical Sciences (NUMS), Abid Majeed Road, The Mall, Rawalpindi 46000, Pakistan
| | - Kyle J. Lauersen
- Biological and Environmental Sciences and Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955, Kingdom of Saudi Arabia
| | - Sana Ikram
- Beijing Higher Institution Engineering Research Center for Food Additives and Ingredients, Beijing Technology & Business University (BTBU), Beijing 100048, P. R. China
| | - Chun Li
- Institute for Synthetic Biosystem/Department of Biochemical Engineering, School of Chemistry and Chemical Engineering, Beijing Institute of Technology (BIT), Beijing 100081, P. R. China
- SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering, Key Laboratory of Systems Bioengineering, Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, P. R. China
- Key Laboratory for Industrial Biocatalysis, Ministry of Education, Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
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17
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Essential Oils: A Natural Weapon against Antibiotic-Resistant Bacteria Responsible for Nosocomial Infections. Antibiotics (Basel) 2021; 10:antibiotics10040417. [PMID: 33920237 PMCID: PMC8070240 DOI: 10.3390/antibiotics10040417] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 04/07/2021] [Accepted: 04/09/2021] [Indexed: 12/11/2022] Open
Abstract
The emergence of antibiotic-resistant bacteria has become a major concern worldwide. This trend indicates the need for alternative agents to antibiotics, such as natural compounds of plant origin. Using agar disc diffusion and minimum inhibitory concentration (MIC) assays, we investigated the antimicrobial activity of Citrus aurantium (AEO), Citrus x limon (LEO), Eucalyptus globulus (EEO), Melaleuca alternifolia (TTO), and Cupressus sempervirens (CEO) essential oils (EOs) against three representatives of antibiotic-resistant pathogens and respective biofilms: vancomycin-resistant enterococci (VRE), methicillin-resistant Staphylococcus aureus (MRSA), and extended-spectrum β-lactamase (ESBL)-producing Escherichia coli. Using the checkerboard method, the efficacy of the EOs alone, in an association with each other, or in combination with the reference antibiotics was quantified by calculating fractional inhibitory concentrations (FICs). All the EOs displayed antibacterial activity against all strains to different extents, and TTO was the most effective. The results of the EO–EO associations and EO–antibiotic combinations clearly showed a synergistic outcome in most tests. Lastly, the effectiveness of EOs both alone and in association or combination against biofilm formed by the antibiotic-resistant strains was comparable to, and sometimes better than, that of the reference antibiotics. In conclusion, the combination of EOs and antibiotics represents a promising therapeutic strategy against antibiotic-resistant bacteria, even protected inside biofilms, which can allow decreasing the concentrations of antibiotics used.
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18
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Denet E, Triadou S, Michalet S, Nazaret S, Favre-Bonté S. Growth of Stenotrophomonas maltophilia and expression of Sme efflux pumps encoding genes in the presence of supernatants from amoebal and bacterial co-cultures: towards the role of amoebal secondary metabolites. ENVIRONMENTAL MICROBIOLOGY REPORTS 2020; 12:702-711. [PMID: 32902135 DOI: 10.1111/1758-2229.12884] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 09/02/2020] [Accepted: 09/07/2020] [Indexed: 06/11/2023]
Abstract
Resistance-Nodulation-Division (RND) efflux pumps are relevant determinants of Stenotrophomonas maltophilia multidrug resistance as they can extrude a broad range of antibiotics and compounds involved in virulence and physiological functions. S. maltophilia, an environmental bacterium, was shown to be associated with amoebae and able to multiply inside them. To explore whether S. maltophilia RND efflux pumps play a role when interacting with amoebae, we evaluated the effect of amoebal culture and co-culture supernatants on the growth of S. maltophilia and the expression of sme efflux pump genes. Acanthamoeba castellanii and Willaertia magna were used as amoebal models and strain S. maltophilia BurE1 as bacterial one. Our data showed that both bacterial growth and sme gene expression were not modified by amoebal culture supernatants. On the contrary, co-culture supernatants negatively impacted the growth of BurE1 and induced the expression of three out of eight efflux pump genes, i.e. smeE, smeN and smeZ. Finally, we evidenced the production of A. castellanii secondary metabolites, putatively belonging to the diterpene family, in the amoebal supernatant and in the co-culture supernatant of A. castellanii and BurE1. Whether these compounds act directly as substrates of the efflux pumps and/or inducers of the sme genes need further investigations.
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Affiliation(s)
- Elodie Denet
- Université Lyon 1, Research Group on Environmental Multi-Resistance and Bacterial Efflux, UMR CNRS 5557/ UMR INRAe 1418 Ecologie Microbienne, 43 Boulevard du 11 Novembre 1918, Villeurbanne Cedex, 69622, France
| | - Sylvain Triadou
- Université Lyon 1, Research Group on Environmental Multi-Resistance and Bacterial Efflux, UMR CNRS 5557/ UMR INRAe 1418 Ecologie Microbienne, 43 Boulevard du 11 Novembre 1918, Villeurbanne Cedex, 69622, France
| | - Serge Michalet
- Université Lyon 1, Research Group on Environmental Multi-Resistance and Bacterial Efflux, UMR CNRS 5557/ UMR INRAe 1418 Ecologie Microbienne, 43 Boulevard du 11 Novembre 1918, Villeurbanne Cedex, 69622, France
| | - Sylvie Nazaret
- Université Lyon 1, Research Group on Environmental Multi-Resistance and Bacterial Efflux, UMR CNRS 5557/ UMR INRAe 1418 Ecologie Microbienne, 43 Boulevard du 11 Novembre 1918, Villeurbanne Cedex, 69622, France
| | - Sabine Favre-Bonté
- Université Lyon 1, Research Group on Environmental Multi-Resistance and Bacterial Efflux, UMR CNRS 5557/ UMR INRAe 1418 Ecologie Microbienne, 43 Boulevard du 11 Novembre 1918, Villeurbanne Cedex, 69622, France
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19
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Francoeur CB, Khadempour L, Moreira-Soto RD, Gotting K, Book AJ, Pinto-Tomás AA, Keefover-Ring K, Currie CR. Bacteria Contribute to Plant Secondary Compound Degradation in a Generalist Herbivore System. mBio 2020; 11:e02146-20. [PMID: 32934088 PMCID: PMC7492740 DOI: 10.1128/mbio.02146-20] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Accepted: 08/11/2020] [Indexed: 02/07/2023] Open
Abstract
Herbivores must overcome a variety of plant defenses, including coping with plant secondary compounds (PSCs). To help detoxify these defensive chemicals, several insect herbivores are known to harbor gut microbiota with the metabolic capacity to degrade PSCs. Leaf-cutter ants are generalist herbivores, obtaining sustenance from specialized fungus gardens that act as external digestive systems and which degrade the diverse collection of plants foraged by the ants. There is in vitro evidence that certain PSCs harm Leucoagaricus gongylophorus, the fungal cultivar of leaf-cutter ants, suggesting a role for the Proteobacteria-dominant bacterial community present within fungus gardens. In this study, we investigated the ability of symbiotic bacteria present within fungus gardens of leaf-cutter ants to degrade PSCs. We cultured fungus garden bacteria, sequenced the genomes of 42 isolates, and identified genes involved in PSC degradation, including genes encoding cytochrome P450 enzymes and genes in geraniol, cumate, cinnamate, and α-pinene/limonene degradation pathways. Using metatranscriptomic analysis, we showed that some of these degradation genes are expressed in situ Most of the bacterial isolates grew unhindered in the presence of PSCs and, using gas chromatography-mass spectrometry (GC-MS), we determined that isolates from the genera Bacillus, Burkholderia, Enterobacter, Klebsiella, and Pseudomonas degrade α-pinene, β-caryophyllene, or linalool. Using a headspace sampler, we show that subcolonies of fungus gardens reduced α-pinene and linalool over a 36-h period, while L. gongylophorus strains alone reduced only linalool. Overall, our results reveal that the bacterial communities in fungus gardens play a pivotal role in alleviating the effect of PSCs on the leaf-cutter ant system.IMPORTANCE Leaf-cutter ants are dominant neotropical herbivores capable of deriving energy from a wide range of plant substrates. The success of leaf-cutter ants is largely due to their external gut, composed of key microbial symbionts, specifically, the fungal mutualist L. gongylophorus and a consistent bacterial community. Both symbionts are known to have critical roles in extracting energy from plant material, yet comparatively little is known about their roles in the detoxification of plant secondary compounds. In this study, we assessed if the bacterial communities associated with leaf-cutter ant fungus gardens can degrade harmful plant chemicals. We identify plant secondary compound detoxification in leaf-cutter ant gardens as a process that depends on the degradative potential of both the bacterial community and L. gongylophorus Our findings suggest that the fungus garden and its associated microbial community influence the generalist foraging abilities of the ants, underscoring the importance of microbial symbionts in plant substrate suitability for herbivores.
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Affiliation(s)
- Charlotte B Francoeur
- Department of Bacteriology, University of Wisconsin-Madison, Madison, Wisconsin, USA
- Department of Energy Great Lakes Bioenergy Research Center, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Lily Khadempour
- Department of Bacteriology, University of Wisconsin-Madison, Madison, Wisconsin, USA
- Department of Energy Great Lakes Bioenergy Research Center, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Rolando D Moreira-Soto
- Sección de Entomología Medica, Departamento de Parasitología, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica
| | - Kirsten Gotting
- Department of Bacteriology, University of Wisconsin-Madison, Madison, Wisconsin, USA
- Laboratory of Genetics, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Adam J Book
- Department of Bacteriology, University of Wisconsin-Madison, Madison, Wisconsin, USA
- Department of Energy Great Lakes Bioenergy Research Center, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Adrián A Pinto-Tomás
- Centro de Investigación en Estructuras Microscópicas, Universidad de Costa Rica, San José, Costa Rica
- Departamento de Bioquímica, Facultad de Medicina, Universidad de Costa Rica, San José, Costa Rica
- Centro de Investigación en Biología Celular y Molecular, Universidad de Costa Rica, San José, Costa Rica
| | - Ken Keefover-Ring
- Departments of Botany and Geography, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Cameron R Currie
- Department of Bacteriology, University of Wisconsin-Madison, Madison, Wisconsin, USA
- Department of Energy Great Lakes Bioenergy Research Center, University of Wisconsin-Madison, Madison, Wisconsin, USA
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20
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Baral B, Mozafari MR. Strategic Moves of "Superbugs" Against Available Chemical Scaffolds: Signaling, Regulation, and Challenges. ACS Pharmacol Transl Sci 2020; 3:373-400. [PMID: 32566906 PMCID: PMC7296549 DOI: 10.1021/acsptsci.0c00005] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Indexed: 12/12/2022]
Abstract
Superbugs' resistivity against available natural products has become an alarming global threat, causing a rapid deterioration in public health and claiming tens of thousands of lives yearly. Although the rapid discovery of small molecules from plant and microbial origin with enhanced bioactivity has provided us with some hope, a rapid hike in the resistivity of superbugs has proven to be the biggest therapeutic hurdle of all times. Moreover, several distinct mechanisms endowed by these notorious superbugs make them immune to these antibiotics subsequently causing our antibiotic wardrobe to be obsolete. In this unfortunate situation, though the time frame for discovering novel "hit molecules" down the line remains largely unknown, our small hope and untiring efforts injected in hunting novel chemical scaffolds with unique molecular targets using high-throughput technologies may safeguard us against these life-threatening challenges to some extent. Amid this crisis, the current comprehensive review highlights the present status of knowledge, our search for bacteria Achilles' heel, distinct molecular signaling that an opportunistic pathogen bestows to trespass the toxicity of antibiotics, and facile strategies and appealing therapeutic targets of novel drugs. Herein, we also discuss multidimensional strategies to combat antimicrobial resistance.
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Affiliation(s)
- Bikash Baral
- Department
of Biochemistry, University of Turku, Tykistökatu 6, Turku, Finland
| | - M. R. Mozafari
- Australasian
Nanoscience and Nanotechnology Initiative, 8054 Monash University LPO, Clayton, Victoria 3168, Australia
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21
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Schempp FM, Hofmann KE, Mi J, Kirchner F, Meffert A, Schewe H, Schrader J, Buchhaupt M. Investigation of monoterpenoid resistance mechanisms in Pseudomonas putida and their consequences for biotransformations. Appl Microbiol Biotechnol 2020; 104:5519-5533. [PMID: 32296906 PMCID: PMC7275096 DOI: 10.1007/s00253-020-10566-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 03/05/2020] [Accepted: 03/20/2020] [Indexed: 12/14/2022]
Abstract
Monoterpenoids are widely used in industrial applications, e.g. as active ingredients in pharmaceuticals, in flavor and fragrance compositions, and in agriculture. Severe toxic effects are known for some monoterpenoids making them challenging compounds for biotechnological production processes. Some strains of the bacterium Pseudomonas putida show an inherent extraordinarily high tolerance towards solvents including monoterpenoids. An understanding of the underlying factors can help to create suitable strains for monoterpenoids de novo production or conversion. In addition, knowledge about tolerance mechanisms could allow a deeper insight into how bacteria can oppose monoterpenoid containing drugs, like tea tree oil. Within this work, the resistance mechanisms of P. putida GS1 were investigated using selected monoterpenoid-hypertolerant mutants. Most of the mutations were found in efflux pump promoter regions or associated transcription factors. Surprisingly, while for the tested monoterpenoid alcohols, ketone, and ether high efflux pump expression increased monoterpenoid tolerance, it reduced the tolerance against geranic acid. However, an increase of geranic acid tolerance could be gained by a mutation in an efflux pump component. It was also found that increased monoterpenoid tolerance can counteract efficient biotransformation ability, indicating the need for a fine-tuned and knowledge-based tolerance improvement for production strain development.Key points• Altered monoterpenoid tolerance mainly related to altered activity of efflux pumps.• Increased tolerance to geranic acid surprisingly caused by decreased export activity. • Reduction of export activity can be beneficial for biotechnological conversions.
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Affiliation(s)
- Florence Miramella Schempp
- DECHEMA-Forschungsinstitut, Industrial Biotechnology, Theodor-Heuss-Allee 25, 60486, Frankfurt am Main, Germany.,Faculty Biological Sciences, Goethe University Frankfurt, Max-von-Laue-Str. 9, 60438, Frankfurt am Main, Germany
| | - Katharina Elisabeth Hofmann
- DECHEMA-Forschungsinstitut, Industrial Biotechnology, Theodor-Heuss-Allee 25, 60486, Frankfurt am Main, Germany
| | - Jia Mi
- DECHEMA-Forschungsinstitut, Industrial Biotechnology, Theodor-Heuss-Allee 25, 60486, Frankfurt am Main, Germany
| | - Ferdinand Kirchner
- DECHEMA-Forschungsinstitut, Industrial Biotechnology, Theodor-Heuss-Allee 25, 60486, Frankfurt am Main, Germany
| | - Annika Meffert
- DECHEMA-Forschungsinstitut, Industrial Biotechnology, Theodor-Heuss-Allee 25, 60486, Frankfurt am Main, Germany
| | - Hendrik Schewe
- DECHEMA-Forschungsinstitut, Industrial Biotechnology, Theodor-Heuss-Allee 25, 60486, Frankfurt am Main, Germany
| | - Jens Schrader
- DECHEMA-Forschungsinstitut, Industrial Biotechnology, Theodor-Heuss-Allee 25, 60486, Frankfurt am Main, Germany
| | - Markus Buchhaupt
- DECHEMA-Forschungsinstitut, Industrial Biotechnology, Theodor-Heuss-Allee 25, 60486, Frankfurt am Main, Germany.
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22
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Solarte AL, Astorga RJ, de Aguiar FC, Tarradas C, Luque I, Gómez-Gascón L, Huerta B. Reduced Susceptibility of Salmonella Typhimurium Strains to Oregano Essential Oil and Enrofloxacin: An In Vitro Assay. Foodborne Pathog Dis 2019; 17:29-34. [PMID: 31710243 DOI: 10.1089/fpd.2019.2635] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Several European animal nutrition companies have incorporated essential oils (EOs) into animal feed as a result of the prohibition of antibiotics to promote animal growth. Previous studies of EOs have highlighted the absence of bacterial resistance for these substances, although most of the published works focus on studying their tolerance to subinhibitory doses. For this study, oregano essential oil (OEO) was chosen for its proven inhibitory and bactericidal activity. This study is an in vitro assay of the possible induction of Salmonella enterica serovar Typhimurium strains with reduced susceptibility to OEO by mutation, seeking to calculate the mutant prevention concentration (MPC) since this is an important measurement for the control Salmonella's resistance to fluoroquinolones such as enrofloxacin (ENR), the treatment of choice for this infection. To establish the MPC, we used a bacterial inoculum ≥109 colony-forming unit (CFU)/mL and examined the bases for points of resistance to ENR and mutations of target genes of the quinolone resistance determining region (QRDR). The three strains of Salmonella Typhimurium used in this study showed an MPC of four times the minimum inhibitory concentration (MIC) for ENR. In all cases, strains with reduced susceptibility to ENR were obtained, although none reached the point of resistance. The QRDR characterization region was in all cases of wild type (wt). Two of the strains tested with OEO grew at a concentration of 1 × MIC, which could be strains with reduced susceptibility, associated with mutation or not. In this case, the MPC was 2 × MIC. Once isolated and identified as Salmonella Typhimurium, the MIC against OEO of all strains obtained in the induction test indicated a possible reduction in susceptibility. However, the result obtained for both strains coincided with MIC of the original strains, rejecting a priori such a reduced susceptibility of Salmonella Typhimurium to OEO.
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Affiliation(s)
- Ana Lucía Solarte
- Animal Health Department, Veterinary Faculty, Rabanales Campus, University of Cordoba, Cordoba, Spain.,"International Excellence Agrifood Campus, CeiA3," University of Cordoba, Cordoba, Spain.,Office of the Vicerrector of Research, Universidad CESMAG, Pasto, Colombia
| | - Rafael Jesús Astorga
- Animal Health Department, Veterinary Faculty, Rabanales Campus, University of Cordoba, Cordoba, Spain.,"International Excellence Agrifood Campus, CeiA3," University of Cordoba, Cordoba, Spain
| | - Fabiana C de Aguiar
- Animal Health Department, Veterinary Faculty, Rabanales Campus, University of Cordoba, Cordoba, Spain.,"International Excellence Agrifood Campus, CeiA3," University of Cordoba, Cordoba, Spain
| | - Carmen Tarradas
- Animal Health Department, Veterinary Faculty, Rabanales Campus, University of Cordoba, Cordoba, Spain.,"International Excellence Agrifood Campus, CeiA3," University of Cordoba, Cordoba, Spain
| | - Inmaculada Luque
- Animal Health Department, Veterinary Faculty, Rabanales Campus, University of Cordoba, Cordoba, Spain.,"International Excellence Agrifood Campus, CeiA3," University of Cordoba, Cordoba, Spain
| | - Lidia Gómez-Gascón
- Animal Health Department, Veterinary Faculty, Rabanales Campus, University of Cordoba, Cordoba, Spain.,"International Excellence Agrifood Campus, CeiA3," University of Cordoba, Cordoba, Spain
| | - Belen Huerta
- Animal Health Department, Veterinary Faculty, Rabanales Campus, University of Cordoba, Cordoba, Spain.,"International Excellence Agrifood Campus, CeiA3," University of Cordoba, Cordoba, Spain
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23
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Essential Oils and Their Natural Active Compounds Presenting Antifungal Properties. Molecules 2019; 24:molecules24203713. [PMID: 31619024 PMCID: PMC6832927 DOI: 10.3390/molecules24203713] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 10/13/2019] [Accepted: 10/14/2019] [Indexed: 12/14/2022] Open
Abstract
The current rise in invasive fungal infections due to the increase in immunosuppressive therapies is a real concern. Moreover, the emergence of resistant strains induces therapeutic failures. In light of these issues, new classes of antifungals are anticipated. Therefore, the plant kingdom represents an immense potential of natural resources to exploit for these purposes. The aim of this review is to provide information about the antifungal effect of some important essential oils, and to describe the advances made in determining the mechanism of action more precisely. Finally, the issues of toxicity and resistance of fungi to essential oils will be discussed.
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24
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Cinnamaldehyde Induces Expression of Efflux Pumps and Multidrug Resistance in Pseudomonas aeruginosa. Antimicrob Agents Chemother 2019; 63:AAC.01081-19. [PMID: 31383658 DOI: 10.1128/aac.01081-19] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Accepted: 07/27/2019] [Indexed: 01/23/2023] Open
Abstract
Essential oils or their components are increasingly used to fight bacterial infections. Cinnamaldehyde (CNA), the main constituent of cinnamon bark oil, has demonstrated interesting properties in vitro against various pathogens, including Pseudomonas aeruginosa In the present study, we investigated the mechanisms and possible therapeutic consequences of P. aeruginosa adaptation to CNA. Exposure of P. aeruginosa PA14 to subinhibitory concentrations of CNA caused a strong albeit transient increase in the expression of operons that encode the efflux systems MexAB-OprM, MexCD-OprJ, MexEF-OprN, and MexXY/OprM. This multipump activation enhanced from 2- to 8-fold the resistance (MIC) of PA14 to various antipseudomonal antibiotics, including meropenem, ceftazidime, tobramycin, and ciprofloxacin. CNA-induced production of pump MexAB-OprM was found to play a major role in the adaption of P. aeruginosa to the electrophilic biocide, through the NalC regulatory pathway. CNA was progressively transformed by bacteria into the less toxic metabolite cinnamic alcohol (CN-OH), via yet undetermined detoxifying mechanisms. In conclusion, the use of cinnamon bark oil or cinnamaldehyde as adjunctive therapy to treat P. aeruginosa infections may potentially have antagonistic effects if combined with antibiotics because of Mex pump activation.
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25
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Casimiro-Soriguer CS, Loucera C, Perez Florido J, López-López D, Dopazo J. Antibiotic resistance and metabolic profiles as functional biomarkers that accurately predict the geographic origin of city metagenomics samples. Biol Direct 2019; 14:15. [PMID: 31429791 PMCID: PMC6701120 DOI: 10.1186/s13062-019-0246-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Accepted: 08/06/2019] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND The availability of hundreds of city microbiome profiles allows the development of increasingly accurate predictors of the origin of a sample based on its microbiota composition. Typical microbiome studies involve the analysis of bacterial abundance profiles. RESULTS Here we use a transformation of the conventional bacterial strain or gene abundance profiles to functional profiles that account for bacterial metabolism and other cell functionalities. These profiles are used as features for city classification in a machine learning algorithm that allows the extraction of the most relevant features for the classification. CONCLUSIONS We demonstrate here that the use of functional profiles not only predict accurately the most likely origin of a sample but also to provide an interesting functional point of view of the biogeography of the microbiota. Interestingly, we show how cities can be classified based on the observed profile of antibiotic resistances. REVIEWERS Open peer review: Reviewed by Jin Zhuang Dou, Jing Zhou, Torsten Semmler and Eran Elhaik.
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Affiliation(s)
- Carlos S. Casimiro-Soriguer
- Clinical Bioinformatics Area, Fundación Progreso y Salud (FPS), CDCA, Hospital Virgen del Rocio, c/Manuel Siurot s/n, 41013 Sevilla, Spain
| | - Carlos Loucera
- Clinical Bioinformatics Area, Fundación Progreso y Salud (FPS), CDCA, Hospital Virgen del Rocio, c/Manuel Siurot s/n, 41013 Sevilla, Spain
| | - Javier Perez Florido
- Clinical Bioinformatics Area, Fundación Progreso y Salud (FPS), CDCA, Hospital Virgen del Rocio, c/Manuel Siurot s/n, 41013 Sevilla, Spain
| | - Daniel López-López
- Clinical Bioinformatics Area, Fundación Progreso y Salud (FPS), CDCA, Hospital Virgen del Rocio, c/Manuel Siurot s/n, 41013 Sevilla, Spain
| | - Joaquin Dopazo
- Clinical Bioinformatics Area, Fundación Progreso y Salud (FPS), CDCA, Hospital Virgen del Rocio, c/Manuel Siurot s/n, 41013 Sevilla, Spain
- Functional Genomics Node (INB), FPS, Hospital Virgen del Rocio, 41013 Sevilla, Spain
- Bioinformatics in Rare Diseases (BiER), Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER). FPS, Hospital Virgen del Rocio, 41013 Sevilla, Spain
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26
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Lamut A, Peterlin Mašič L, Kikelj D, Tomašič T. Efflux pump inhibitors of clinically relevant multidrug resistant bacteria. Med Res Rev 2019; 39:2460-2504. [PMID: 31004360 DOI: 10.1002/med.21591] [Citation(s) in RCA: 109] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 03/31/2019] [Accepted: 04/02/2019] [Indexed: 12/29/2022]
Abstract
Bacterial infections are an increasingly serious issue worldwide. The inability of existing therapies to treat multidrug-resistant pathogens has been recognized as an important challenge of the 21st century. Efflux pumps are important in both intrinsic and acquired bacterial resistance and identification of small molecule efflux pump inhibitors (EPIs), capable of restoring the effectiveness of available antibiotics, is an active research field. In the last two decades, much effort has been made to identify novel EPIs. However, none of them has so far been approved for therapeutic use. In this article, we explore different structural families of currently known EPIs for multidrug resistance efflux systems in the most extensively studied pathogens (NorA in Staphylococcus aureus, AcrAB-TolC in Escherichia coli, and MexAB-OprM in Pseudomonas aeruginosa). Both synthetic and natural compounds are described, with structure-activity relationship studies and optimization processes presented systematically for each family individually. In vitro activities against selected test strains are presented in a unifying manner for all the EPIs described, together with the most important toxicity, pharmacokinetic and in vivo efficacy data. A critical evaluation of lead-likeness characteristics and the potential for clinical development of the most promising inhibitors of the three efflux systems is described. This overview of EPIs is a good starting point for the identification of novel effective antibacterial drugs.
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Affiliation(s)
- Andraž Lamut
- Chair of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia
| | - Lucija Peterlin Mašič
- Chair of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia
| | - Danijel Kikelj
- Chair of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia
| | - Tihomir Tomašič
- Chair of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia
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27
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Owen L, White AW, Laird K. Characterisation and screening of antimicrobial essential oil components against clinically important antibiotic-resistant bacteria using thin layer chromatography-direct bioautography hyphenated with GC-MS, LC-MS and NMR. PHYTOCHEMICAL ANALYSIS : PCA 2019; 30:121-131. [PMID: 30280447 DOI: 10.1002/pca.2797] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 08/31/2018] [Accepted: 09/06/2018] [Indexed: 06/08/2023]
Abstract
INTRODUCTION The antimicrobial activity of many essential oils (EOs) is well established, indicating that EOs may be a source of compounds for antimicrobial drug development. Thin layer chromatography-direct bioautography (TLC-DB) can quickly identify antimicrobial components in complex mixtures and can be applied to the screening of EOs for lead compounds. OBJECTIVES This study aimed to identify antimicrobial components of oregano, rosewood and cumin EOs against antibiotic-sensitive and -resistant bacteria using TLC-DB and a multi-faceted approach of GC-MS, LC-MS and NMR techniques to characterise bioactive compounds. The study also aimed to quantify the antimicrobial activity of bioactive compounds in order to evaluate their potential for the development of therapies against antibiotic-resistant bacteria. MATERIALS AND METHODS EOs were eluted on TLC plates and sprayed with a suspension of Staphylococcus aureus, Enterococcus faecium, Escherichia coli or Pseudomonas aeruginosa (antibiotic-sensitive and -resistant isolates). Zones of inhibition, visualised with iodonitrotetrazolium chloride, were subject to GC-MS, LC-MS and NMR to characterise the bioactive compounds. RESULTS Seven compounds were identified from the three EOs using GC-MS, while LC-MS and NMR failed to detect the presence of any further non-volatile or heat labile compounds. Carvacrol was most antimicrobial compound identified, with minimum inhibitory concentrations ranging 0.99-31.62 mM. CONCLUSION The identified antimicrobial compounds present in oregano, rosewood and cumin EOs including carvacrol may be candidates for the development of novel antimicrobial therapies against antibiotic-resistant bacteria.
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Affiliation(s)
- Lucy Owen
- Infectious Disease Research Group, School of Pharmacy, De Montfort University, Leicester, UK
| | - Alex W White
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Cardiff, UK
| | - Katie Laird
- Infectious Disease Research Group, School of Pharmacy, De Montfort University, Leicester, UK
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28
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Puentes-Cala E, Harder J. An RND transporter in the monoterpene metabolism of Castellaniella defragrans. Biodegradation 2018; 30:1-12. [PMID: 30334144 PMCID: PMC6394551 DOI: 10.1007/s10532-018-9857-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Accepted: 09/27/2018] [Indexed: 11/28/2022]
Abstract
The betaproteobacterium Castellaniella defragrans 65Phen grows on monoterpenes at concentrations toxic to many bacteria. Tolerance mechanisms include modifications of the membrane fatty acid composition and the mineralization of monoterpenes. In this study, we characterized an efflux transporter associated to the monoterpene metabolism. The inner-membrane transporter AmeD (apolar monoterpene efflux) affiliated to the HAE3 (hydrophobe/amphiphile efflux) family within the Resistance-Nodulation-Division (RND) superfamily. RND pumps of the HAE3 family are known for transporting substrates into the periplasm. AmeD is co-expressed with the outer membrane protein AmeA and the periplasmic proteins AmeB and AmeC, suggesting an export channel into the environment similar to HAE1-type RND exporters. Proteins AmeABCD are encoded within a genetic island involved in the metabolism of acyclic and cyclic monoterpenes. The deletion of ameABCD translated into a decrease in tolerance to monoterpenes in liquid cultures. The addition of acetate as cosubstrate in limonene-containing cultures partially alleviated monoterpene toxicity in the deletion mutant. Accumulation of Nile Red in cells of C. defragrans required dissipation of the proton motive force with carbonyl cyanide m-chlorophenylhydrazone (CCCP). Cells lacking AmeABCD accumulated more Nile Red, suggesting an export function of the proteins. Our observations suggest that the tetrapartite RND transporter AmeABCD acts as an exporter during monoterpene detoxification in C. defragrans.
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Affiliation(s)
- Edinson Puentes-Cala
- Dept. of Microbiology, Max Planck-Institute for Marine Microbiology, Celsiusstr. 1, 28359, Bremen, Germany.
| | - Jens Harder
- Dept. of Microbiology, Max Planck-Institute for Marine Microbiology, Celsiusstr. 1, 28359, Bremen, Germany
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29
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Blanco P, Sanz-García F, Hernando-Amado S, Martínez JL, Alcalde-Rico M. The development of efflux pump inhibitors to treat Gram-negative infections. Expert Opin Drug Discov 2018; 13:919-931. [PMID: 30198793 DOI: 10.1080/17460441.2018.1514386] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
INTRODUCTION One of the possibilities for reducing the emergence and spread of antibiotic resistance is the use of anti-resistance compounds capable of resensitizing resistant microorganisms to current antimicrobials. For this purpose, multidrug efflux pumps, whose inhibition may increase bacterial susceptibility to several antibiotics, including macrolides to which Gram-negatives are considered intrinsically resistant, have emerged as suitable targets. Areas covered: In the current review, the authors discuss different mechanisms that can be exploited for inhibiting multidrug efflux pumps and describe the properties and the potential therapeutic value of already studied efflux pumps inhibitors. Although efforts have already been made to develop these inhibitors, there are currently no good candidates for treating infectious diseases. Consequently, the authors also discuss potential approaches for their development. Expert opinion: Classical anti-resistance drugs such as beta-lactamases inhibitors, while useful, are only purposeful for treating infections caused by beta-lactamase producers. However, inhibitors of multidrug efflux pumps, which are present on all organisms, can sensitize both susceptible and resistant bacteria to antibiotics belonging to several different structural families. Since some efflux pumps are involved in bacterial infections, their inhibition may also reduce the infectivity of Gram-negative bacterial pathogens.
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Affiliation(s)
- Paula Blanco
- a Department of Microbial Biotechnology , Centro Nacional de Biotecnología. CSIC , Madrid , Spain
| | - Fernando Sanz-García
- a Department of Microbial Biotechnology , Centro Nacional de Biotecnología. CSIC , Madrid , Spain
| | - Sara Hernando-Amado
- a Department of Microbial Biotechnology , Centro Nacional de Biotecnología. CSIC , Madrid , Spain
| | - José Luis Martínez
- a Department of Microbial Biotechnology , Centro Nacional de Biotecnología. CSIC , Madrid , Spain
| | - Manuel Alcalde-Rico
- a Department of Microbial Biotechnology , Centro Nacional de Biotecnología. CSIC , Madrid , Spain
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30
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Nascimento F, Vicente C, Cock P, Tavares M, Rossi M, Hasegawa K, Mota M. From plants to nematodes: Serratia grimesii BXF1 genome reveals an adaptation to the modulation of multi-species interactions. Microb Genom 2018; 4. [PMID: 29781797 PMCID: PMC6113876 DOI: 10.1099/mgen.0.000178] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Serratia grimesii BXF1 is a bacterium with the ability to modulate the development of several eukaryotic hosts. Strain BXF1 was isolated from the pinewood nematode, Bursaphelenchus xylophilus, the causative agent of pine wilt disease affecting pine forests worldwide. This bacterium potentiates Bursaphelenchus xylophilus reproduction, acts as a beneficial pine endophyte, and possesses fungal and bacterial antagonistic activities, further indicating a complex role in a wide range of trophic relationships. In this work, we describe and analyse the genome sequence of strain BXF1, and discuss several important aspects of its ecological role. Genome analysis indicates the presence of several genes related to the observed production of antagonistic traits, plant growth regulation and the modulation of nematode development. Moreover, most of the BXF1 genes are involved in environmental and genetic information processing, which is consistent with its ability to sense and colonize several niches. The results obtained in this study provide the basis to a better understanding of the role and evolution of strain BXF1 as a mediator of interactions between organisms involved in a complex disease system. These results may also bring new insights into general Serratia and Enterobacteriaceae evolution towards multitrophic interactions.
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Affiliation(s)
- Francisco Nascimento
- 2Information and Computer Sciences, James Hutton Institute, Invergowrie, Dundee DD2 5DA, UK.,1Nemalab/ICAAM - Instituto de Ciências Agrárias e Ambientais Mediterrânicas, Departamento de Biologia, Universidade de Évora, Núcleo da Mitra, Ap. 94, 7002-554 Évora, Portugal
| | - Cláudia Vicente
- 1Nemalab/ICAAM - Instituto de Ciências Agrárias e Ambientais Mediterrânicas, Departamento de Biologia, Universidade de Évora, Núcleo da Mitra, Ap. 94, 7002-554 Évora, Portugal.,3Department of Environmental Biology, College of Bioscience and Biotechnology, Chubu University, 1200 Matsumoto, Kasugai, Aichi 487-8501, Japan
| | - Peter Cock
- 2Information and Computer Sciences, James Hutton Institute, Invergowrie, Dundee DD2 5DA, UK
| | - Maria Tavares
- 4Departamento de Microbiologia, Laboratório de Bioprocessos, Universidade Federal de Santa Catarina, Florianópolis SC 88040-900, Brazil
| | - Márcio Rossi
- 4Departamento de Microbiologia, Laboratório de Bioprocessos, Universidade Federal de Santa Catarina, Florianópolis SC 88040-900, Brazil
| | - Koichi Hasegawa
- 3Department of Environmental Biology, College of Bioscience and Biotechnology, Chubu University, 1200 Matsumoto, Kasugai, Aichi 487-8501, Japan
| | - Manuel Mota
- 1Nemalab/ICAAM - Instituto de Ciências Agrárias e Ambientais Mediterrânicas, Departamento de Biologia, Universidade de Évora, Núcleo da Mitra, Ap. 94, 7002-554 Évora, Portugal.,5Departamento Ciências da Vida, EPCV Universidade Lusófona de Humanidades e Tecnologias, C. Grande 376, Lisboa, 1749-024, Portugal
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31
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Zolfo M, Asnicar F, Manghi P, Pasolli E, Tett A, Segata N. Profiling microbial strains in urban environments using metagenomic sequencing data. Biol Direct 2018; 13:9. [PMID: 29743119 PMCID: PMC5944035 DOI: 10.1186/s13062-018-0211-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Accepted: 04/26/2018] [Indexed: 11/10/2022] Open
Abstract
Background The microbial communities populating human and natural environments have been extensively characterized with shotgun metagenomics, which provides an in-depth representation of the microbial diversity within a sample. Microbes thriving in urban environments may be crucially important for human health, but have received less attention than those of other environments. Ongoing efforts started to target urban microbiomes at a large scale, but the most recent computational methods to profile these metagenomes have never been applied in this context. It is thus currently unclear whether such methods, that have proven successful at distinguishing even closely related strains in human microbiomes, are also effective in urban settings for tasks such as cultivation-free pathogen detection and microbial surveillance. Here, we aimed at a) testing the currently available metagenomic profiling tools on urban metagenomics; b) characterizing the organisms in urban environment at the resolution of single strain and c) discussing the biological insights that can be inferred from such methods. Results We applied three complementary methods on the 1614 metagenomes of the CAMDA 2017 challenge. With MetaMLST we identified 121 known sequence-types from 15 species of clinical relevance. For instance, we identified several Acinetobacter strains that were close to the nosocomial opportunistic pathogen A. nosocomialis. With StrainPhlAn, a generalized version of the MetaMLST approach, we inferred the phylogenetic structure of Pseudomonas stutzeri strains and suggested that the strain-level heterogeneity in environmental samples is higher than in the human microbiome. Finally, we also probed the functional potential of the different strains with PanPhlAn. We further showed that SNV-based and pangenome-based profiling provide complementary information that can be combined to investigate the evolutionary trajectories of microbes and to identify specific genetic determinants of virulence and antibiotic resistances within closely related strains. Conclusion We show that strain-level methods developed primarily for the analysis of human microbiomes can be effective for city-associated microbiomes. In fact, (opportunistic) pathogens can be tracked and monitored across many hundreds of urban metagenomes. However, while more effort is needed to profile strains of currently uncharacterized species, this work poses the basis for high-resolution analyses of microbiomes sampled in city and mass transportation environments. Reviewers This article was reviewed by Alexandra Bettina Graf, Daniel Huson and Trevor Cickovski. Electronic supplementary material The online version of this article (10.1186/s13062-018-0211-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Moreno Zolfo
- Centre for Integrative Biology, University of Trento, Via Sommarive 9, 38123, Trento, TN, Italy
| | - Francesco Asnicar
- Centre for Integrative Biology, University of Trento, Via Sommarive 9, 38123, Trento, TN, Italy
| | - Paolo Manghi
- Centre for Integrative Biology, University of Trento, Via Sommarive 9, 38123, Trento, TN, Italy
| | - Edoardo Pasolli
- Centre for Integrative Biology, University of Trento, Via Sommarive 9, 38123, Trento, TN, Italy
| | - Adrian Tett
- Centre for Integrative Biology, University of Trento, Via Sommarive 9, 38123, Trento, TN, Italy
| | - Nicola Segata
- Centre for Integrative Biology, University of Trento, Via Sommarive 9, 38123, Trento, TN, Italy.
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32
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Owen L, Laird K. Synchronous application of antibiotics and essential oils: dual mechanisms of action as a potential solution to antibiotic resistance. Crit Rev Microbiol 2018; 44:414-435. [PMID: 29319372 DOI: 10.1080/1040841x.2018.1423616] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Antibiotic resistance has increased dramatically in recent years, yet the antibiotic pipeline has stalled. New therapies are therefore needed to continue treating antibiotic resistant infections. One potential strategy currently being explored is the use of non-antibiotic compounds to potentiate the activity of currently employed antibiotics. Many natural products including Essential Oils (EOs) possess broad spectrum antibacterial activity and so have been investigated for this purpose. This article aims to review recent literature concerning the antibacterial activity of EOs and their interactions with antibiotics, with consideration of dual mechanisms of action of EOs and antibiotics as a potential solution to antibiotic resistance. Synergistic interactions between EOs and their components with antibiotics have been reported, including several instances of antibiotic resensitization in resistant isolates, in support of this strategy to control antibiotic resistance. However, a lack of consistency in methods and interpretation criteria makes drawing conclusions of efficacy of studied combinations difficult. Synergistic effects are often not explored beyond preliminary identification of antibacterial interactions and mechanism of action is rarely defined, despite many hypotheses and recommendations for future study. Much work is needed to fully understand EO-antibiotic associations before they can be further developed into novel antibacterial formulations.
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Affiliation(s)
- Lucy Owen
- a Infectious Disease Research Group, The School of Pharmacy , De Montfort University , Leicester , UK
| | - Katie Laird
- a Infectious Disease Research Group, The School of Pharmacy , De Montfort University , Leicester , UK
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33
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Bua A, Usai D, Donadu MG, Delgado Ospina J, Paparella A, Chaves-Lopez C, Serio A, Rossi C, Zanetti S, Molicotti P. Antimicrobial activity of Austroeupatorium inulaefolium (H.B.K.) against intracellular and extracellular organisms. Nat Prod Res 2017; 32:2869-2871. [PMID: 29017356 DOI: 10.1080/14786419.2017.1385014] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The antimicrobial activity of Austroeupatorium inulaefolium (H.B.K.) essential oil was studied in different pathogens species and its cytotoxicity activity was determinated on different cellular lines. Despite the good antibacterial activity of A. inulaefolium, it has been cytotoxic at low concentrations. Consequently it might be interesting to determine the antimicrobial activity and cytotoxicity of the major compounds of this essential oil.
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Affiliation(s)
- A Bua
- a Department of Biomedical Science , University of Sassari , Sassari , Italy
| | - D Usai
- a Department of Biomedical Science , University of Sassari , Sassari , Italy
| | - M G Donadu
- a Department of Biomedical Science , University of Sassari , Sassari , Italy
| | - J Delgado Ospina
- b Grupo de Biotecnología , University of San Buenaventura Sede Cali , Cali , Colombia
| | - A Paparella
- c Faculty of Bioscience and Technology for Food, Agricolture and Environment , University of Teramo , Teramo , Italy
| | - C Chaves-Lopez
- c Faculty of Bioscience and Technology for Food, Agricolture and Environment , University of Teramo , Teramo , Italy
| | - A Serio
- c Faculty of Bioscience and Technology for Food, Agricolture and Environment , University of Teramo , Teramo , Italy
| | - C Rossi
- c Faculty of Bioscience and Technology for Food, Agricolture and Environment , University of Teramo , Teramo , Italy
| | - S Zanetti
- a Department of Biomedical Science , University of Sassari , Sassari , Italy
| | - P Molicotti
- a Department of Biomedical Science , University of Sassari , Sassari , Italy
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Markelova NN, Semenova EF. Sensitivity of nonfermentative gram-negative bacteria to essential oils of different origin. Microbiology (Reading) 2017. [DOI: 10.1134/s0026261717050150] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Talat SE, El-Mongy MA, Mabrouk MI, Mohammed AA, Hamza HA. Molecular Characterization of β-lactam Antibiotic Resistant Pseudomonas aeruginosa Isolated from Egyptian Food. INT J PHARMACOL 2017. [DOI: 10.3923/ijp.2017.313.322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Brochot A, Guilbot A, Haddioui L, Roques C. Antibacterial, antifungal, and antiviral effects of three essential oil blends. Microbiologyopen 2017; 6. [PMID: 28296357 PMCID: PMC5552930 DOI: 10.1002/mbo3.459] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 01/09/2017] [Accepted: 01/25/2017] [Indexed: 01/01/2023] Open
Abstract
New agents that are effective against common pathogens are needed particularly for those resistant to conventional antimicrobial agents. Essential oils (EOs) are known for their antimicrobial activity. Using the broth microdilution method, we showed that (1) two unique blends of Cinnamomum zeylanicum, Daucus carota, Eucalyptus globulus and Rosmarinus officinalis EOs (AB1 and AB2; cinnamon EOs from two different suppliers) were active against the fourteen Gram‐positive and ‐negative bacteria strains tested, including some antibiotic‐resistant strains. Minimal inhibitory concentrations (MICs) ranged from 0.01% to 3% v/v with minimal bactericidal concentrations from <0.01% to 6.00% v/v; (2) a blend of Cinnamomum zeylanicum, Daucus carota, Syzygium aromaticum, Origanum vulgare EOs was antifungal to the six Candida strains tested, with MICs ranging from 0.01% to 0.05% v/v with minimal fungicidal concentrations from 0.02% to 0.05% v/v. Blend AB1 was also effective against H1N1 and HSV1 viruses. With this dual activity, against H1N1 and against S. aureus and S. pneumoniae notably, AB1 may be interesting to treat influenza and postinfluenza bacterial pneumonia infections. These blends could be very useful in clinical practice to combat common infections including those caused by microorganisms resistant to antimicrobial drugs.
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Affiliation(s)
| | | | | | - Christine Roques
- Fonderephar, Toulouse Cedex 09, France.,Laboratoire de Génie Chimique UMR 5503, Faculté des Sciences Pharmaceutiques, Université Paul Sabatier, Toulouse, France
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Leite de Souza E. The effects of sublethal doses of essential oils and their constituents on antimicrobial susceptibility and antibiotic resistance among food-related bacteria: A review. Trends Food Sci Technol 2016. [DOI: 10.1016/j.tifs.2016.07.012] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Alcalde-Rico M, Hernando-Amado S, Blanco P, Martínez JL. Multidrug Efflux Pumps at the Crossroad between Antibiotic Resistance and Bacterial Virulence. Front Microbiol 2016; 7:1483. [PMID: 27708632 PMCID: PMC5030252 DOI: 10.3389/fmicb.2016.01483] [Citation(s) in RCA: 138] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Accepted: 09/06/2016] [Indexed: 01/24/2023] Open
Abstract
Multidrug efflux pumps can be involved in bacterial resistance to antibiotics at different levels. Some efflux pumps are constitutively expressed at low levels and contribute to intrinsic resistance. In addition, their overexpression may allow higher levels of resistance. This overexpression can be transient, in the presence of an effector (phenotypic resistance), or constitutive when mutants in the regulatory elements of the expression of efflux pumps are selected (acquired resistance). Efflux pumps are present in all cells, from human to bacteria and are highly conserved, which indicates that they are ancient elements in the evolution of different organisms. Consequently, it has been suggested that, besides antibiotic resistance, bacterial multidrug efflux pumps would likely contribute to other relevant processes of the microbial physiology. In the current article, we discuss some specific examples of the role that efflux pumps may have in the bacterial virulence of animals’ and plants’ pathogens, including the processes of intercellular communication. Based in these evidences, we propose that efflux pumps are at the crossroad between resistance and virulence of bacterial pathogens. Consequently, the comprehensive study of multidrug efflux pumps requires addressing these functions, which are of relevance for the bacterial–host interactions during infection.
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Affiliation(s)
- Manuel Alcalde-Rico
- Departamento de Biotecnología Microbiana, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas Madrid, Spain
| | - Sara Hernando-Amado
- Departamento de Biotecnología Microbiana, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas Madrid, Spain
| | - Paula Blanco
- Departamento de Biotecnología Microbiana, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas Madrid, Spain
| | - José L Martínez
- Departamento de Biotecnología Microbiana, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas Madrid, Spain
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F Souza C, Baldissera MD, A Vaucher R, Lopes LQS, Vizzotto BS, Raffin RP, Santos RCV, L da Veiga M, U M da Rocha MI, Stefani LM, Baldisserotto B. In vivo bactericidal effect of Melaleuca alternifolia essential oil against Aeromonas hydrophila: Silver catfish (Rhamdia quelen) as an experimental model. Microb Pathog 2016; 98:82-7. [PMID: 27392700 DOI: 10.1016/j.micpath.2016.07.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2016] [Revised: 07/03/2016] [Accepted: 07/04/2016] [Indexed: 11/26/2022]
Abstract
Aeromonas hydrophila is one of the main causative agent of high mortality and significative economic losses in aquaculture and has become increasingly resistant to conventional antibiotics. One feasible alternative to control and treat it is the use of essential oils. This study aimed to evaluate A. hydrophila susceptibility to tea tree oil (TTO-Melaleuca alternifolia) in vivo, and the effect of this treatment. In vivo tests were performed using silver catfish (Rhamdia quelen) as the experimental model. Silver catfish were treated with TTO at 25 and 50 μL/L for seven days before infection. After seven days, the fish were inoculated with A. hydrophila via intramuscularly. Treatment with TTO at 50 μL/L was able to extend longevity of infected fish, and showed 88% of therapeutic success, even though it did not show curative efficacy. TTO treatment was not toxic under these tested concentrations, since biomarkers of hepatic and renal functions were not affected, and the concentration of 50 μL/L was able to prevent increased levels of aspartate aminotransferase. There was no significative differences regarding hematological parameters (p < 0.05). Treatment with TTO 50 μL/L was able to reduce histopathological alterations usually caused by this type of bacteria in the gills, but it was unable to reduce hepatic histopathological alterations. Our results showed, for the first time, that TTO has high activity against A. hydrophila and proved to be a natural alternative to prevent and control this pathogen.
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Affiliation(s)
- Carine F Souza
- Department of Physiology and Pharmacology, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil.
| | - Matheus D Baldissera
- Department of Microbiology and Parasitology, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - Rodrigo A Vaucher
- Laboratory of Nanotechnology, Centro Universitário Franciscano, Santa Maria, RS, Brazil; Laboratory of Microbiology, Centro Universitário Franciscano, Santa Maria, RS, Brazil
| | - Leonardo Q S Lopes
- Laboratory of Nanotechnology, Centro Universitário Franciscano, Santa Maria, RS, Brazil; Laboratory of Microbiology, Centro Universitário Franciscano, Santa Maria, RS, Brazil
| | - Bruno S Vizzotto
- Laboratory of Microbiology, Centro Universitário Franciscano, Santa Maria, RS, Brazil
| | - Renata P Raffin
- Laboratory of Nanotechnology, Centro Universitário Franciscano, Santa Maria, RS, Brazil
| | - Roberto C V Santos
- Laboratory of Nanotechnology, Centro Universitário Franciscano, Santa Maria, RS, Brazil; Laboratory of Microbiology, Centro Universitário Franciscano, Santa Maria, RS, Brazil
| | - Marcelo L da Veiga
- Laboratory of Experimental Morphophysiology, Department of Morphology, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - Maria Izabel U M da Rocha
- Laboratory of Experimental Morphophysiology, Department of Morphology, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - Lenita M Stefani
- Department of Animal Science, Universidade do Estado de Santa Catarina (UDESC), Chapecó, SC, Brazil
| | - Bernardo Baldisserotto
- Department of Physiology and Pharmacology, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
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Hosseinkhani F, Jabalameli F, Banar M, Abdellahi N, Taherikalani M, Leeuwen WBV, Emaneini M. Monoterpene isolated from the essential oil of Trachyspermum ammi is cytotoxic to multidrug-resistant Pseudomonas aeruginosa and Staphylococcus aureus strains. Rev Soc Bras Med Trop 2016; 49:172-6. [DOI: 10.1590/0037-8682-0329-2015] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2015] [Accepted: 02/19/2016] [Indexed: 11/22/2022] Open
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Mbaveng AT, Ignat AG, Ngameni B, Zaharia V, Ngadjui BT, Kuete V. In vitro antibacterial activities of p-toluenesulfonyl-hydrazinothiazoles and hydrazinoselenazoles against multi-drug resistant Gram-negative phenotypes. BMC Pharmacol Toxicol 2016; 17:3. [PMID: 26782344 PMCID: PMC4717659 DOI: 10.1186/s40360-016-0046-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Accepted: 01/11/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Bacterial multidrug resistance (MDR) constitutes a major hurdle in the treatment of infectious diseases worldwide. The present study was designed to evaluate the antibacterial activities of synthetic p-toluenesulfonyl-hydrazinothiazoles against multidrug resistant Gram-negative bacteria. METHODS The broth microdilution method was used to determine the minimal inhibitory concentrations (MIC). RESULTS The results demonstrated that the best activities were obtained with hydrazinoselenazoles. p-Chloro-benzyliden-selenosemicarbazide, 4-methyl-2-[(4-chloro-benzyliden)-hydrazinyl]-1,3-selenazole, p-chloro-benzoyl-selenosemicarbazide and 4-chloromethyl-2-[(4-chlorobenziliden)-N-acetyl-hydrazinyl]-1,3-selenazole were more active than the choramphenicol on Klebsiella pneumoniae KP63. Tested alone, the lowest MIC value of 16 mg/L was obtained with p-methoxy-benzyliden-selenosemicarbazide against Enterobacter aerogenes ATCC13048, K. pneumoniae ATCC112296 and KP55. Tested in the presence of an efflux pump inhibitor, phenylalanine arginine β-naphthylamide (PAβN), the activity of p-chloro-benzyliden-selenosemicarbazide, 4-methyl-2-[(4-chloro-benzyliden)-hydrazinyl]-1,3-selenazole, p-chloro-benzoyl-selenosemicarbazide and p-methoxy-benzyliden-selenosemicarbazide significantly increased with MIC values below 10 mg/L obtained respectively on 43.8 %, 31.3 %, 62.5 % and 100 % of the 16 tested bacterial strains. The lowest MIC value of 0.5 mg/L in the presence of PAβN was recorded with p-chloro-benzoyl-selenosemicarbazide against Escherichia coli ATCC8739 and KP55 as well as p-methoxy-benzyliden-selenosemicarbazide against E. aerogenes KP55. p-Chloro-benzyliden-selenosemicarbazide and p-chloro-benzoyl-selenosemicarbazide contained the same pharmacophore as p-methoxy-benzyliden-selenosemicarbazide. CONCLUSION This study indicates that p-chloro-benzyliden-selenosemicarbazide, p-chloro-benzoyl-selenosemicarbazide and p-methoxy-benzyliden-selenosemicarbazide could be explored more to develop novel antimicrobial drugs to fight MDR bacterial infections.
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Affiliation(s)
- Armelle T Mbaveng
- Department of Biochemistry, Faculty of Science, University of Dschang, Dschang, Cameroon.
| | - Adriana Grozav Ignat
- Department of Organic Chemistry, Faculty of Pharmacy, "Iuliu Hatieganu" University of Medicine and Pharmacy, Cluj-Napoca, Romania.
| | - Bathélémy Ngameni
- Department of Pharmacognosy and Pharmaceutical Chemistry, Faculty of Medicine and Biomedical Sciences University of Yaoundé I, Yaoundé, Cameroon.
| | - Valentin Zaharia
- Department of Organic Chemistry, Faculty of Pharmacy, "Iuliu Hatieganu" University of Medicine and Pharmacy, Cluj-Napoca, Romania.
| | - Bonaventure T Ngadjui
- Department of Organic Chemistry, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon.
| | - Victor Kuete
- Department of Biochemistry, Faculty of Science, University of Dschang, Dschang, Cameroon.
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Murbach Teles Andrade BF, Nunes Barbosa L, Bérgamo Alves FC, Albano M, Mores Rall VL, Sforcin JM, Fernandes AAH, Fernandes Júnior A. The antibacterial effects ofMelaleuca alternifolia,Pelargonium graveolensandCymbopogon martiniiessential oils and major compounds on liquid and vapor phase. JOURNAL OF ESSENTIAL OIL RESEARCH 2015. [DOI: 10.1080/10412905.2015.1099571] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Melo ADB, Amaral AF, Schaefer G, Luciano FB, de Andrade C, Costa LB, Rostagno MH. Antimicrobial effect against different bacterial strains and bacterial adaptation to essential oils used as feed additives. CANADIAN JOURNAL OF VETERINARY RESEARCH = REVUE CANADIENNE DE RECHERCHE VETERINAIRE 2015; 79:285-289. [PMID: 26424908 PMCID: PMC4581672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Accepted: 05/08/2015] [Indexed: 06/05/2023]
Abstract
The aim of this study was to evaluate the antimicrobial activity and determine the minimum bactericidal concentration (MBC) of the essential oils derived from Origanum vulgare (oregano), Melaleuca alternifolia (tea tree), Cinnamomum cassia (cassia), and Thymus vulgaris (white thyme) against Salmonella Typhimurium, Salmonella Enteritidis, Escherichia coli, Staphylococcus aureus and Enterococcus faecalis. The study also investigated the ability of these different bacterial strains to develop adaptation after repetitive exposure to sub-lethal concentrations of these essential oils. The MBC of the essential oils studied was determined by disc diffusion and broth dilution methods. All essential oils showed antimicrobial effect against all bacterial strains. In general, the development of adaptation varied according to the bacterial strain and the essential oil (tea tree > white thyme > oregano). Therefore, it is important to use essential oils at efficient bactericidal doses in animal feed, food, and sanitizers, since bacteria can rapidly develop adaptation when exposed to sub-lethal concentrations of these oils.
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Affiliation(s)
- Antonio Diego Brandão Melo
- Address all correspondence to Antonio Diego Brandão Melo; telephone: +55 41 3299-4314; fax: +55 41 3299-4363; e-mail:
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Yang J, Xiong ZQ, Song SJ, Wang JF, Lv HJ, Wang Y. Improving heterologous polyketide production in Escherichia coli by transporter engineering. Appl Microbiol Biotechnol 2015; 99:8691-700. [DOI: 10.1007/s00253-015-6718-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Revised: 04/27/2015] [Accepted: 05/21/2015] [Indexed: 10/23/2022]
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Stappen I, Tabanca N, Ali A, Wedge DE, Wanner J, Kaul VK, Lal B, Jaitak V, Gochev VK, Schmidt E, Jirovetz L. Chemical Composition and Biological Activity of Essential Oils from Wild Growing Aromatic Plant Species of Skimmia laureola and Juniperus macropoda from Western Himalaya. Nat Prod Commun 2015. [DOI: 10.1177/1934578x1501000669] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The Himalayan region is very rich in a great variety of medicinal plants. In this investigation the essential oils of two selected species are described for their antimicrobial and larvicidal as well as biting deterrent activities. Additionally, the odors are characterized. Analyzed by simultaneous GC-MS and GC-FID, the essential oils’ chemical compositions are given. The main components of Skimmia laureola oil were linalool and linalyl acetate whereas sabinene was found as the main compound for Juniperus macropoda essential oil. Antibacterial testing by agar dilution assay revealed highest activity of S. laureola oil against all tested bacteria, followed by J. macropoda oil. Antifungal activity was evaluated against the strawberry anthracnose causing plant pathogens Colletotrichum acutatum, C. fragariae and C. gloeosporioides. Juniperus macropoda essential oil indicated higher antifungal activity against all three pathogens than S. laureola oil. Both essential oils showed biting deterrent activity above solvent control but low larvicidal activity.
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Affiliation(s)
- Iris Stappen
- Department of Medicinal Chemistry, University of Vienna, Vienna, Austria
| | - Nurhayat Tabanca
- National Center for Natural Products Research, The University of Mississippi, University, MS 38677, USA
| | - Abbas Ali
- National Center for Natural Products Research, The University of Mississippi, University, MS 38677, USA
| | - David E. Wedge
- US Department of Agriculture, Agricultural Research Service, Natural Products Utilization Research Unit, University of Mississippi, University, MS 38677, USA
| | | | - Vijay K. Kaul
- CSIR-Institute of Himalayan Bioresource Technology, Palampur 176061, H.P., India
| | - Brij Lal
- Biodiversity Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, India
| | - Vikas Jaitak
- Centre for Chemical and Pharmaceutical Sciences, Central University of Punjab, Bathinda, India
| | - Velizar K. Gochev
- Department of Biochemistry and Microbiology, “Paisii Hilendarski”- University of Plovdiv, Plovdiv, Bulgaria
| | - Erich Schmidt
- Department of Medicinal Chemistry, University of Vienna, Vienna, Austria
| | - Leopold Jirovetz
- Department of Medicinal Chemistry, University of Vienna, Vienna, Austria
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Li XZ, Plésiat P, Nikaido H. The challenge of efflux-mediated antibiotic resistance in Gram-negative bacteria. Clin Microbiol Rev 2015; 28:337-418. [PMID: 25788514 PMCID: PMC4402952 DOI: 10.1128/cmr.00117-14] [Citation(s) in RCA: 899] [Impact Index Per Article: 99.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
The global emergence of multidrug-resistant Gram-negative bacteria is a growing threat to antibiotic therapy. The chromosomally encoded drug efflux mechanisms that are ubiquitous in these bacteria greatly contribute to antibiotic resistance and present a major challenge for antibiotic development. Multidrug pumps, particularly those represented by the clinically relevant AcrAB-TolC and Mex pumps of the resistance-nodulation-division (RND) superfamily, not only mediate intrinsic and acquired multidrug resistance (MDR) but also are involved in other functions, including the bacterial stress response and pathogenicity. Additionally, efflux pumps interact synergistically with other resistance mechanisms (e.g., with the outer membrane permeability barrier) to increase resistance levels. Since the discovery of RND pumps in the early 1990s, remarkable scientific and technological advances have allowed for an in-depth understanding of the structural and biochemical basis, substrate profiles, molecular regulation, and inhibition of MDR pumps. However, the development of clinically useful efflux pump inhibitors and/or new antibiotics that can bypass pump effects continues to be a challenge. Plasmid-borne efflux pump genes (including those for RND pumps) have increasingly been identified. This article highlights the recent progress obtained for organisms of clinical significance, together with methodological considerations for the characterization of MDR pumps.
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Affiliation(s)
- Xian-Zhi Li
- Human Safety Division, Veterinary Drugs Directorate, Health Products and Food Branch, Health Canada, Ottawa, Ontario, Canada
| | - Patrick Plésiat
- Laboratoire de Bactériologie, Faculté de Médecine-Pharmacie, Centre Hospitalier Régional Universitaire, Université de Franche-Comté, Besançon, France
| | - Hiroshi Nikaido
- Department of Molecular and Cell Biology, University of California, Berkeley, California, USA
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Marmulla R, Harder J. Microbial monoterpene transformations-a review. Front Microbiol 2014; 5:346. [PMID: 25076942 PMCID: PMC4097962 DOI: 10.3389/fmicb.2014.00346] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Accepted: 06/21/2014] [Indexed: 11/17/2022] Open
Abstract
Isoprene and monoterpenes constitute a significant fraction of new plant biomass. Emission rates into the atmosphere alone are estimated to be over 500 Tg per year. These natural hydrocarbons are mineralized annually in similar quantities. In the atmosphere, abiotic photochemical processes cause lifetimes of minutes to hours. Microorganisms encounter isoprene, monoterpenes, and other volatiles of plant origin while living in and on plants, in the soil and in aquatic habitats. Below toxic concentrations, the compounds can serve as carbon and energy source for aerobic and anaerobic microorganisms. Besides these catabolic reactions, transformations may occur as part of detoxification processes. Initial transformations of monoterpenes involve the introduction of functional groups, oxidation reactions, and molecular rearrangements catalyzed by various enzymes. Pseudomonas and Rhodococcus strains and members of the genera Castellaniella and Thauera have become model organisms for the elucidation of biochemical pathways. We review here the enzymes and their genes together with microorganisms known for a monoterpene metabolism, with a strong focus on microorganisms that are taxonomically validly described and currently available from culture collections. Metagenomes of microbiomes with a monoterpene-rich diet confirmed the ecological relevance of monoterpene metabolism and raised concerns on the quality of our insights based on the limited biochemical knowledge.
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Affiliation(s)
- Robert Marmulla
- Department of Microbiology, Max Planck Institute for Marine Microbiology Bremen, Germany
| | - Jens Harder
- Department of Microbiology, Max Planck Institute for Marine Microbiology Bremen, Germany
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Apolónio J, Faleiro ML, Miguel MG, Neto L. No induction of antimicrobial resistance inStaphylococcus aureusandListeria monocytogenesduring continuous exposure to eugenol and citral. FEMS Microbiol Lett 2014; 354:92-101. [DOI: 10.1111/1574-6968.12440] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Revised: 03/26/2014] [Accepted: 04/04/2014] [Indexed: 11/29/2022] Open
Affiliation(s)
- Joana Apolónio
- IBB-Centro de Biomedicina Molecular e Estrutural; Faculdade de Ciências e Tecnologia; Universidade do Algarve; Faro Portugal
- Instituto de Higiene e Medicina Tropical; Universidade Nova de Lisboa; Lisboa Portugal
| | - Maria L. Faleiro
- IBB-Centro de Biomedicina Molecular e Estrutural; Faculdade de Ciências e Tecnologia; Universidade do Algarve; Faro Portugal
| | - Maria G. Miguel
- IBB-Centro de Biotecnologia Vegetal; Faculdade de Ciências e Tecnologia; Universidade do Algarve; Faro Portugal
| | - Luís Neto
- Faculdade de Ciências e Tecnologia; Study Center of Agricultural Sciences and Technology; Universidade do Algarve; Faro Portugal
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Noumedem JAK, Mihasan M, Kuiate JR, Stefan M, Cojocaru D, Dzoyem JP, Kuete V. In vitro antibacterial and antibiotic-potentiation activities of four edible plants against multidrug-resistant gram-negative species. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2013; 13:190. [PMID: 23885762 PMCID: PMC3734210 DOI: 10.1186/1472-6882-13-190] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/07/2013] [Accepted: 07/24/2013] [Indexed: 11/21/2022]
Abstract
Background The present study was designed to investigate the antibacterial activities of the methanol extracts of four Cameroonian edible plants, locally used to treat microbial infections, and their synergistic effects with antibiotics against a panel of twenty nine Gram-negative bacteria including Multi-drug resistant (MDR) phenotypes expressing active efflux pumps. Methods The broth microdilution method was used to determine the minimum inhibitory concentrations (MICs) of the extracts [alone and in the presence of the efflux pumps inhibitor (EPI) Phenylalanine-Arginine β-Naphtylamide (PAβN)], and those of antibiotics in association with the two of the most active ones, Piper nigrum and Telfairia occidentalis. The preliminary phytochemical screening of the extracts was conducted according to the standard phytochemical methods. Results Phytochemical analysis showed the presence of alkaloids and flavonoids in all studied extracts. Other chemical classes of secondary metabolites were selectively present in the extracts. The results of the MIC determination indicated that the crude extracts from P. nigrum and V. amygdalina were able to inhibit the growth of all the twenty nine studied bacteria within a concentration range of 32 to 1024 μg/mL. At a similar concentration range (32 to 1024 μg/mL) the extract from T. occidentalis inhibited the growth of 93.1% of the tested microorganisms. At MIC/2 and MIC/5, synergistic effects were noted between the extracts from P. nigrum and T. occidentalis and seven of the tested antibiotics on more than 70% of the tested bacteria. Conclusion The overall results of the present study provide information for the possible use of the studied edible plants extracts in the control of bacterial infections including MDR phenotypes.
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50
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Enhancing isoprenoid production through systematically assembling and modulating efflux pumps in Escherichia coli. Appl Microbiol Biotechnol 2013; 97:8057-67. [DOI: 10.1007/s00253-013-5062-z] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Revised: 05/31/2013] [Accepted: 06/14/2013] [Indexed: 02/01/2023]
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