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Rombolà L, De Rasis E, Sakurada S, Sakurada T, Corasaniti MT, Bagetta G, Scuteri D, Morrone LA. Motor behavior induced by bergamot essential oil in experimental tasks is differentially modulated by pretreatment with metabotropic glutamate receptor 2/3 or 5 antagonists. Phytother Res 2024; 38:3296-3306. [PMID: 38619875 DOI: 10.1002/ptr.8206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 02/26/2024] [Accepted: 03/25/2024] [Indexed: 04/17/2024]
Abstract
Bergamot essential oil shows anxiolytic-relaxant effects devoid of sedative action and motor impairment typical of benzodiazepines. Considering the potential for clinical of these effects, it is important to understand the underlying mechanisms of the phytocomplex. Modulation of glutamate group I and II metabotropic receptors is involved in stress and anxiety disorders, in cognition and emotions and increases locomotor activity and wakefulness. Interestingly, early data indicate that bergamot essential oil modulates glutamatergic transmission in specific manifestations of the central nervous system. The aim of this work is to investigate if selective antagonists of metabotropic glutamate 2/3 and 5 receptors affect behavioral parameters modulated by the phytocomplex. Male Wistar rats were used to measure behavioral parameters to correlate anxiety and motor activity using elevated plus maze (EPM), open field (OF), and rotarod tasks. Bergamot essential oil increases in EPM the time spent in open/closed arms and reduces total number of entries. The essential oil also increases immobility in EPM and OF and not affect motor coordination in rotarod. Pretreatment with the metabotropic glutamate antagonists does not affect the time spent in open/close arms, however, differently affects motor behavior measured after administration of phytocomplex. Particularly, glutamate 2/3 antagonist reverts immobility and glutamate 5 antagonist potentiates this parameter induced by the phytocomplex. Our data show that modulation of both metabotropic glutamate receptors is likely involved in some of behavioral effects of bergamot essential oil.
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Affiliation(s)
- Laura Rombolà
- Preclinical and Translational Pharmacology, Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy
| | - Enrica De Rasis
- Preclinical and Translational Pharmacology, Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy
| | - Shinobu Sakurada
- Department of Physiology and Anatomy, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Tsukasa Sakurada
- First Department of Pharmacology, Daiichi College of Pharmaceutical Sciences, Fukuoka, Japan
| | | | - Giacinto Bagetta
- Preclinical and Translational Pharmacology, Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy
| | - Damiana Scuteri
- Department of Health Sciences, University "Magna Graecia" of Catanzaro, Catanzaro, Italy
| | - Luigi Antonio Morrone
- Preclinical and Translational Pharmacology, Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy
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Georgantopoulos A, Vougioukas A, Kalousi FD, Tsialtas I, Psarra AMG. Comparative Studies on the Anti-Inflammatory and Apoptotic Activities of Four Greek Essential Oils: Involvement in the Regulation of NF-κΒ and Steroid Receptor Signaling. Life (Basel) 2023; 13:1534. [PMID: 37511910 PMCID: PMC10381560 DOI: 10.3390/life13071534] [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: 05/28/2023] [Revised: 06/30/2023] [Accepted: 07/04/2023] [Indexed: 07/30/2023] Open
Abstract
Essential oils (EOs) are well-known for their anti-fungal, anti-microbial, anti-inflammatory and relaxing activities. Steroid hormones, especially glucocorticoids, are also well-known for their anti-inflammatory activities and control of the hypothalamus-pituitary-adrenal (HPA) axis and glucose homeostasis. The biological activities of glucocorticoids render them the most widely prescribed anti-inflammatory drugs, despite their adverse side effects. In this study, comparative studies of the anti-inflammatory activities and interference with glucocorticoids receptor (GR) and estrogen receptor (ER) signaling of EOs from Greek Oregano, Melissa officinalis, Lavender and from the Chios Mastic, produced from the Greek endemic mastic tree, were performed in Human Embryonic Kidney 293 (HEK-293) cells. Chios Mastic (Mastiha) and oregano EOs exhibited the highest anti-inflammatory activities. The former showed a reduction in both NF-κB activity and protein levels. Mastic essential oil also caused a reduction in GR protein levels that may compensate for its boosting effect on dexamethasone (DEX)-induced GR transcriptional activation, ending up in no induction of the gluconeogenic phoshoenolpyruvate carboxykinase (PEPCK) protein levels that constitute the GR target. Oregano, Melissa officinalis and lavender EOs caused the suppression of the transcriptional activation of GR. Furthermore, the most active EO, that taken from Melissa officinalis, showed a reduction in both GR and PEPCK protein levels. Thus, the anti-inflammatory and anti-gluconeogenic activities of the EOs were uncovered, possibly via the regulation of GR signaling. Moreover, cytotoxic actions of Melissa officinalis and lavender EOs via the induction of mitochondrial-dependent apoptosis were revealed. Our results highlight these essentials oils' anti-inflammatory and apoptotic actions in relation to their implication on the regulation of steroid hormones' actions, uncovering their potential use in steroid therapy, with many applications in pharmaceutical and health industries as anti-cancer, anti-hyperglycemic and anti-inflammatory supplements.
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Affiliation(s)
- Achilleas Georgantopoulos
- Department of Biochemistry and Biotechnology, University of Thessaly, Biopolis, 41500 Larissa, Greece
| | - Athanasios Vougioukas
- Department of Biochemistry and Biotechnology, University of Thessaly, Biopolis, 41500 Larissa, Greece
| | - Foteini D Kalousi
- Department of Biochemistry and Biotechnology, University of Thessaly, Biopolis, 41500 Larissa, Greece
| | - Ioannis Tsialtas
- Department of Biochemistry and Biotechnology, University of Thessaly, Biopolis, 41500 Larissa, Greece
| | - Anna-Maria G Psarra
- Department of Biochemistry and Biotechnology, University of Thessaly, Biopolis, 41500 Larissa, Greece
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3
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Infortuna C, Gualano F, Freedberg D, Patel SP, Sheikh AM, Muscatello MRA, Bruno A, Mento C, Chusid E, Han Z, Thomas FP, Battaglia F. Motor Cortex Response to Pleasant Odor Perception and Imagery: The Differential Role of Personality Dimensions and Imagery Ability. Front Hum Neurosci 2022; 16:943469. [PMID: 35903786 PMCID: PMC9314567 DOI: 10.3389/fnhum.2022.943469] [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: 05/13/2022] [Accepted: 06/17/2022] [Indexed: 12/03/2022] Open
Abstract
Background Neuroimaging studies have shown a complex pattern of brain activation during perception of a pleasant odor and during its olfactory imagery. To date, little is known regarding changes in motor cortex excitability during these tasks. Bergamot essential oil (BEO) is extensively used in perfumes and cosmetics for its pleasantness. Therefore, to further our understanding of the human sense of smell, this study aimed to investigate the effect of perception and imagery of a pleasant odor (BEO) on motor cortex using Transcranial magnetic stimulation (TMS). Materials and Methods We examined the primary motor cortex (M1) excitability during perception of a pleasant odor (BEO) or perception of odorless saline (experiment 1). Furthermore, we tested the effect of olfactory imagery (OI) of BEO on corticospinal excitability (experiment 2). The increase in motor evoked potential (MEP) amplitude was correlated with personality dimensions scores, pleasantness, vividness, and general imagery ability. Results The results indicate that the corticospinal excitability changed after both perception and imagery of a pleasant odor (BEO). The correlation analysis shows an association with neuroticism personality trait (experiment 1) and with general olfactory imagery ability (experiment 2). Conclusion Both perception of a pleasant odor and its olfactory imagery modulate motor cortex excitability. The enhanced brain activation is affected by specific individual characteristics. Overall, our findings provide physiological evidence for a complex interaction between the olfactory and motor systems.
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Affiliation(s)
- Carmenrita Infortuna
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, Policlinico Universitario “G. Martino”, University of Messina, Messina, Italy
| | - Francesca Gualano
- Department of Medical Sciences, Hackensack Meridian School of Medicine, Nutley, NJ, United States
- Department of Neurology, Hackensack Meridian School of Medicine, Nutley, NJ, United States
| | - David Freedberg
- Department of Art History and Archeology, Italian Academy for Advanced Studies, Columbia University, New York, NY, United States
| | - Sapan P. Patel
- Department of Art History and Archeology, Italian Academy for Advanced Studies, Columbia University, New York, NY, United States
| | - Asad M. Sheikh
- Department of Pre-Clinical Sciences, New York College of Podiatric Medicine, New York, NY, United States
| | - Maria Rosaria Anna Muscatello
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, Policlinico Universitario “G. Martino”, University of Messina, Messina, Italy
| | - Antonio Bruno
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, Policlinico Universitario “G. Martino”, University of Messina, Messina, Italy
| | - Carmela Mento
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, Policlinico Universitario “G. Martino”, University of Messina, Messina, Italy
| | - Eileen Chusid
- Department of Pre-Clinical Sciences, New York College of Podiatric Medicine, New York, NY, United States
| | - Zhiyong Han
- Department of Medical Sciences, Hackensack Meridian School of Medicine, Nutley, NJ, United States
| | - Florian P. Thomas
- Department of Neurology, Hackensack Meridian School of Medicine, Nutley, NJ, United States
| | - Fortunato Battaglia
- Department of Medical Sciences, Hackensack Meridian School of Medicine, Nutley, NJ, United States
- Department of Neurology, Hackensack Meridian School of Medicine, Nutley, NJ, United States
- *Correspondence: Fortunato Battaglia,
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Scuteri D, Sakurada S, Sakurada T, Tonin P, Bagetta G, Nicotera P, Corasaniti MT. Requirements for translation in clinical trials of aromatherapy: the case of the essential oil of bergamot (BEO) for the management of agitation in severe dementia. Curr Pharm Des 2022; 28:1607-1610. [DOI: 10.2174/1381612828666220509152029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 03/22/2022] [Indexed: 11/22/2022]
Abstract
Abstract:
Due to the tight link between undertreated pain and agitation in dementia patients, aromatherapy can be a useful approach if an essential oil (EO) with powerful analgesic activity is used. The methodological difficulties of most aromatherapy trials have not allowed any definitive conclusion about the effectiveness of aromatherapy in dementia. The objective of the present perspective is to illustrate the long rigorous process leading from preclinical research to clinical translation of the EO of bergamot (BEO) for the management of agitation in dementia. A nanotechnology-based delivery system consisting of odorless alpha-tocopheryl stearate solid lipid nanoparticles (SLN) loaded with EO of bergamot (BEO) (NanoBEO), has been proven active on acute and neuropathic pain models confirming the strong antinociceptive and anti-allodynic efficacy reported for BEO in preclinical studies. In particular, prolonged physicochemical stability of NanoBEO and titration in its main components are remarkable advantages allowing reproducible antinociceptive and anti-itch responses to be measured. Furthermore, the possibility to perform double-blind clinical trials, made impossible so far because of the strong smell of essential oils used in aromatherapy. Demented patients receive limited treatment for chronic pain, particularly neuropathic. The BRAINAID (NCT04321889) trial will assess the effectiveness of NanoBEO on agitation and pain in severely demented patients to offer a safe tool able to provide relief to this fragile population. This double-blind clinical trial will be the first to assess the efficacy and safety of an engineered essential oil and will provide the rationale for the safer treatment of neuropsychiatric symptoms of dementia and pain in clinic.
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Affiliation(s)
- Damiana Scuteri
- Pharmacotechnology Documentation and Transfer Unit, Preclinical and Translational Pharmacology, Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende, Italy
- Regional Center for Serious Brain Injuries, S. Anna Institute, 88900 Crotone, Italy
| | - Shinobu Sakurada
- Department of Physiology and Anatomy, Tohoku Pharmaceutical University, 981-8558 Sendai, Japan
| | - Tsukasa Sakurada
- Department of Pharmacology, Daiichi University of Pharmacy, 815-8511 Fukuoka, Japan
| | - Paolo Tonin
- Regional Center for Serious Brain Injuries, S. Anna Institute, 88900 Crotone, Italy
| | - Giacinto Bagetta
- Pharmacotechnology Documentation and Transfer Unit, Preclinical and Translational Pharmacology, Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende, Italy
| | - Pierluigi Nicotera
- German Center for Neurodegenerative Diseases (DZNE), 53127 Bonn, Germany
- Department of Health Sciences, University 'Magna Graecia' of Catanzaro, 88100 Catanzaro, Italy
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5
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Translational Value of the Transdermal Administration of Bergamot Essential Oil and of Its Fractions. Pharmaceutics 2022; 14:pharmaceutics14051006. [PMID: 35631592 PMCID: PMC9143031 DOI: 10.3390/pharmaceutics14051006] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Revised: 05/01/2022] [Accepted: 05/05/2022] [Indexed: 12/12/2022] Open
Abstract
The essential oil of bergamot (BEO) has consistently proven antinociceptive and antiallodynic properties. Accordingly, the analgesic efficacy of the decolored essential oil (DEC), with higher levels of limonene, and the deterpenated (DET) fraction, with higher levels of linalool and linalyl acetate, was investigated using a formalin test after inhalation. The present study was aimed at characterizing the effects of BEO, its components with the highest pharmacological activity (represented by linalool, limonene, and linalyl acetate), and its DEC and DET fractions on the formalin test after transdermal administration relevant to clinical translation through topical application. To this aim, the schedule of intervention involved administration immediately after formalin injection or as a 5 min pretreatment followed by washout in ddY-strain mice. This study demonstrates, for the first time, the significant analgesic effect of all three constituents in the first and second phases, accounting for the efficacy of the essential oil in the formalin test. While all fractions revealed equal activity toward the phytocomplex in the early phase, the reduction in time of licking/biting during the late phase was more markedly induced by DEC. Moreover, pretreatment with BEO and its fractions followed by washout did not produce a significant reduction in licking/biting time in both phases of formalin-induced nociceptive response.
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Abstract
Citrus essential oils (EOs) are widely used as flavoring agents in food, pharmaceutical, cosmetical and chemical industries. For this reason, their demand is constantly increasing all over the world. Besides industrial applications, the abundance of EOs in the epicarp is particularly relevant for the quality of citrus fruit. In fact, these compounds represent a natural protection against postharvest deteriorations due to their remarkable antimicrobial, insecticidal and antioxidant activities. Several factors, including genotype, climatic conditions and cultural practices, can influence the assortment and accumulation of EOs in citrus peels. This review is focused on factors influencing variation of the EOs’ composition during ripening and on the implications on postharvest quality of the fruit.
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7
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Hartley N, McLachlan CS. Aromas Influencing the GABAergic System. Molecules 2022; 27:molecules27082414. [PMID: 35458615 PMCID: PMC9026314 DOI: 10.3390/molecules27082414] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 03/31/2022] [Accepted: 04/02/2022] [Indexed: 02/07/2023] Open
Abstract
Aromas have a powerful influence in our everyday life and are known to exhibit an array of pharmacological properties, including anxiolytic, anti-stress, relaxing, and sedative effects. Numerous animal and human studies support the use of aromas and their constituents to reduce anxiety-related symptoms and/or behaviours. Although the exact mechanism of how these aromas exert their anxiolytic effects is not fully understood, the GABAergic system is thought to be primarily involved. The fragrance emitted from a number of plant essential oils has shown promise in recent studies in modulating GABAergic neurotransmission, with GABAA receptors being the primary therapeutic target. This review will explore the anxiolytic and sedative properties of aromas found in common beverages, such as coffee, tea, and whisky as well aromas found in food, spices, volatile organic compounds, and popular botanicals and their constituents. In doing so, this review will focus on these aromas and their influence on the GABAergic system and provide greater insight into viable anxiety treatment options.
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Affiliation(s)
- Neville Hartley
- Department of Naturopathy and Western Herbal Medicine, Health Faculty, Fortitude Valley Campus, Torrens University Australia, Brisbane, QLD 4006, Australia
- Correspondence:
| | - Craig S. McLachlan
- Centre for Healthy Futures, Health Faculty, Surry Hills Campus, Torrens University Australia, Sydney, NSW 2010, Australia;
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8
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Antispasmodic Effect of Bergamot Essential Oil on Rat Isolated Gut Tissues. Pharmaceutics 2022; 14:pharmaceutics14040775. [PMID: 35456609 PMCID: PMC9025531 DOI: 10.3390/pharmaceutics14040775] [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: 03/11/2022] [Revised: 03/26/2022] [Accepted: 03/31/2022] [Indexed: 02/04/2023] Open
Abstract
Preclinical data indicate that bergamot essential oil (BEO) can modulate the synaptic functions within the central nervous system (CNS). Particularly, several data shows that essential oil is endowed with reproducible analgesic and anxiolytic effects that may derived from the ability to modulate the excitatory and inhibitory neurotransmission in the CNS. Although there are differences in the functional complexity of the enteric nervous system (ENS), it is likely that the phytocomplex has biological properties in gut superimposable to those showed in the CNS. Accordingly, the aim of this study was to investigate ex-vivo the effect of bergamot essential oil and its main constituents on the contractile activity of rat isolated colon, jejunum and ileum induced by different muscle stimulants such as acetylcholine (10−6 M) and potassium chloride (80 mM). Our present data demonstrate that BEO inhibits cholinergically- and non cholinergically-mediated contractions in rat isolated gut and that linalool is the most active component. These results suggest that the phytocomplex might be useful in the treatment of spastic disorders in ENS mainly characterized by the presence of pain; incidentally, irritable bowel syndrome (IBS) is a painful condition in which a role for neurotransmitter dysfunction has been envisaged. More investigation is required for clinical translation of the present data.
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9
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Scuteri D, Sandrini G, Tamburin S, Corasaniti MT, Nicotera P, Tonin P, Bagetta G. Bergamot rehabilitation AgaINst agitation in dementia (BRAINAID): Study protocol for a randomized, double-blind, placebo-controlled trial to assess the efficacy of furocoumarin-free bergamot loaded in a nanotechnology-based delivery system of the essential oil in the treatment of agitation in elderly affected by severe dementia. Phytother Res 2021; 35:5333-5338. [PMID: 34435395 PMCID: PMC9290822 DOI: 10.1002/ptr.7223] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 06/27/2021] [Accepted: 07/03/2021] [Indexed: 12/24/2022]
Abstract
Pain is underdiagnosed and often not adequately treated, contributing to behavioral and psychological symptoms of dementia (BPSD). BPSD are treated with atypical antipsychotics that are associated with severe cerebrocardiovascular effects. Interestingly, treatment of pain may reduce agitation. Research is focusing on nonpharmacological treatment, such as aromatherapy, for pain and BPSD in dementia. This clinical study will assess the effect on agitation in severely demented elderly of BEO loaded in a nanotechnological odorless cream indistinguishable from placebo. This is a protocol for a randomized, double‐blind, placebo‐controlled trial (NCT04321889). A total of 134 patients aged ≥65 years with severe dementia (mini‐mental state examination <12) will be recruited and randomly allocated 1:1 to either BEO or placebo group. After baseline screening, BEO (80 mg) cream or placebo cream will be trans‐dermally applied on both arms twice a day for 4 weeks with a 4‐week follow‐up period. The effect on agitation will be the primary endpoint. Any adverse events will be reported. A double‐blind, clinical trial evaluating efficacy and safety of an essential oil endowed with strong analgesic properties has never been carried out before. This study could form the basis for a safer and more effective treatment of BPSD in severe dementia.
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Affiliation(s)
- Damiana Scuteri
- Pharmacotechnology Documentation and Transfer Unit, Preclinical and Translational Pharmacology, Department of Pharmacy, Health Science and Nutrition, University of Calabria, Rende, Italy.,S. Anna Institute, Regional Center for Serious Brain Injuries, Crotone, Italy
| | - Giorgio Sandrini
- Department of Brain and Behavioral Sciences, University of Pavia, IRCCS C. Mondino Foundation Neurologic Institute, Pavia, Italy
| | - Stefano Tamburin
- Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
| | | | | | - Paolo Tonin
- S. Anna Institute, Regional Center for Serious Brain Injuries, Crotone, Italy
| | - Giacinto Bagetta
- Pharmacotechnology Documentation and Transfer Unit, Preclinical and Translational Pharmacology, Department of Pharmacy, Health Science and Nutrition, University of Calabria, Rende, Italy
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10
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Aponso M, Patti A, Hearn MTW, Bennett LE. Anxiolytic effects of essential oils may involve anti-oxidant regulation of the pro-oxidant effects of ascorbate in the brain. Neurochem Int 2021; 150:105153. [PMID: 34384852 DOI: 10.1016/j.neuint.2021.105153] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 08/02/2021] [Accepted: 08/05/2021] [Indexed: 01/01/2023]
Abstract
Essential oils (EOs) absorbed via inhalation are consistently reported to produce anxiolytic effects. The underlying neurochemical mechanisms, however, are not well understood. High concentrations of ascorbate in the human brain (~10 mM in neurons) implicates this compound as a key signaling molecule and regulator of oxidative stress. In this study, we demonstrate the significant in vitro capacity of ascorbate to produce H2O2 in the presence of oxygen at physiological pH values, peaking at ~400 μM for ascorbate levels of 1.0 mg/mL (5.6 mM). In comparison, individual EOs and selected neurotransmitters at similar concentrations produced <100 μM H2O2. Systematic studies with binary and ternary mixtures containing ascorbate indicated that EOs and neurotransmitters could variably enhance (pro-oxidant, POX) or suppress (anti-oxidant, AOX) the production of H2O2 versus the ascorbate control, depending on the concentration ratios of the components in the mixture. Moreover, the AOX/POX chemistry observed with binary mixtures did not necessarily predict effects with ternary mixtures, where the POX ascorbate chemistry tended to dominate. A model is proposed to account for the ability of compounds with electron-donating capacity to catalytically regenerate ascorbate from intermediate oxidized forms of ascorbate, thus driving H2O2 production and exerting a net POX effect; whilst compounds that irreversibly reacted with oxidized forms of ascorbate suppressed the production of H2O2 and produced an overall AOX effect. Since the anxiolytic effects of different EOs, including extracts of Lavendula angustifolia (lavender) and Salvia rosmarinus (rosemary), were associated with AOX regulation of H2O2 production by ascorbate, it can be concluded that these anxiolytic effects are potentially related to the AOX properties of EOs. In contrast, EOs driving POX effects (eg, Junipenus communis (Juniper) berry EO) are proposed to be more useful for their potential anti-microbial or cancer cytotoxic applications.
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Affiliation(s)
- Minoli Aponso
- School of Chemistry, Monash University, Clayton, Victoria, 3800, Australia
| | - Antonio Patti
- School of Chemistry, Monash University, Clayton, Victoria, 3800, Australia
| | - Milton T W Hearn
- School of Chemistry, Monash University, Clayton, Victoria, 3800, Australia
| | - Louise E Bennett
- School of Chemistry, Monash University, Clayton, Victoria, 3800, Australia.
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11
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Eddin LB, Jha NK, Meeran MFN, Kesari KK, Beiram R, Ojha S. Neuroprotective Potential of Limonene and Limonene Containing Natural Products. Molecules 2021; 26:4535. [PMID: 34361686 PMCID: PMC8348102 DOI: 10.3390/molecules26154535] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 07/17/2021] [Accepted: 07/20/2021] [Indexed: 11/17/2022] Open
Abstract
Limonene is a monoterpene confined to the family of Rutaceae, showing several biological properties such as antioxidant, anti-inflammatory, anticancer, antinociceptive and gastroprotective characteristics. Recently, there is notable interest in investigating the pharmacological effects of limonene in various chronic diseases due to its mitigating effect on oxidative stress and inflammation and regulating apoptotic cell death. There are several available studies demonstrating the neuroprotective role of limonene in neurodegenerative diseases, including Alzheimer's disease, multiple sclerosis, epilepsy, anxiety, and stroke. The high abundance of limonene in nature, its safety profile, and various mechanisms of action make this monoterpene a favorable molecule to be developed as a nutraceutical for preventive purposes and as an alternative agent or adjuvant to modern therapeutic drugs in curbing the onset and progression of neurodegenerative diseases. This manuscript presents a comprehensive review of the available scientific literature discussing the pharmacological activities of limonene or plant products containing limonene which attribute to the protective and therapeutic ability in neurodegenerative disorders. This review has been compiled based on the existing published articles confined to limonene or limonene-containing natural products investigated for their neurotherapeutic or neuroprotective potential. All the articles available in English or the abstract in English were extracted from different databases that offer an access to diverse journals. These databases are PubMed, Scopus, Google Scholar, and Science Direct. Collectively, this review emphasizes the neuroprotective potential of limonene against neurodegenerative and other neuroinflammatory diseases. The available data are indicative of the nutritional use of products containing limonene and the pharmacological actions and mechanisms of limonene and may direct future preclinical and clinical studies for the development of limonene as an alternative or complementary phytomedicine. The pharmacophore can also provide a blueprint for further drug discovery using numerous drug discovery tools.
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Affiliation(s)
- Lujain Bader Eddin
- Department of Pharmacology and Therapeutics, College of Medicine and Health Sciences, United Arab Emirates University, P.O. Box 17666, Al Ain 17666, United Arab Emirates; (L.B.E.); (M.F.N.M.); (R.B.)
| | - Niraj Kumar Jha
- Department of Biotechnology, School of Engineering & Technology, Sharda University, Greater Noida, Uttar Pradesh 201310, India;
| | - M. F. Nagoor Meeran
- Department of Pharmacology and Therapeutics, College of Medicine and Health Sciences, United Arab Emirates University, P.O. Box 17666, Al Ain 17666, United Arab Emirates; (L.B.E.); (M.F.N.M.); (R.B.)
| | - Kavindra Kumar Kesari
- Department of Applied Physics, School of Science, Aalto University, 00076 Espoo, Finland;
- Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, 00076 Espoo, Finland
| | - Rami Beiram
- Department of Pharmacology and Therapeutics, College of Medicine and Health Sciences, United Arab Emirates University, P.O. Box 17666, Al Ain 17666, United Arab Emirates; (L.B.E.); (M.F.N.M.); (R.B.)
| | - Shreesh Ojha
- Department of Pharmacology and Therapeutics, College of Medicine and Health Sciences, United Arab Emirates University, P.O. Box 17666, Al Ain 17666, United Arab Emirates; (L.B.E.); (M.F.N.M.); (R.B.)
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12
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Scuteri D, Sakurada T, Tonin P, Corasaniti MT, Bagetta G. Editorial: "Novel Pain Therapeutics: From Basic Research to Clinical Translation and Rehabilitation". Front Pharmacol 2021; 12:681422. [PMID: 33935797 PMCID: PMC8080444 DOI: 10.3389/fphar.2021.681422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 03/22/2021] [Indexed: 11/13/2022] Open
Affiliation(s)
- Damiana Scuteri
- Pharmacotechnology Documentation and Transfer Unit, Section of Preclinical and Translational Pharmacology, Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy.,Regional Center for Serious Brain Injuries, S. Anna Institute, Crotone, Italy
| | - Tsukasa Sakurada
- Center for Supporting Pharmaceutical Education, Faculty of Pharmaceutical Sciences, Daiichi University of Pharmacy, Fukuoka, Japan
| | - Paolo Tonin
- Regional Center for Serious Brain Injuries, S. Anna Institute, Crotone, Italy
| | - Maria Tiziana Corasaniti
- Department of Health Sciences, University "Magna Graecia" of Catanzaro, Catanzaro, Italy.,School of Hospital Pharmacy, University "Magna Graecia" of Catanzaro, Catanzaro, Italy
| | - Giacinto Bagetta
- Pharmacotechnology Documentation and Transfer Unit, Section of Preclinical and Translational Pharmacology, Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy
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13
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Development and Translation of NanoBEO, a Nanotechnology-Based Delivery System of Bergamot Essential Oil Deprived of Furocumarins, in the Control of Agitation in Severe Dementia. Pharmaceutics 2021; 13:pharmaceutics13030379. [PMID: 33809385 PMCID: PMC7999378 DOI: 10.3390/pharmaceutics13030379] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 03/03/2021] [Accepted: 03/05/2021] [Indexed: 01/10/2023] Open
Abstract
Dementia is one of the most common causes of disability worldwide characterized by memory loss, cognitive impairment, and behavioral and psychological symptoms (BPSD), including agitation. Treatment of the latter consists of the off-label use of harmful atypical antipsychotics, though a significant reduction is afforded by pain control. The use of an essential oil endowed with analgesic properties and devoid of toxicity would represent an important option for the management of agitation in dementia. Therefore, the aim of this study was to engineer a nanotechnology delivery system based on solid lipid nanoparticles loaded with bergamot essential oil (BEO) and devised in the pharmaceutical form of an odorless cream (NanoBEO) to confirm its analgesic efficacy for further development and application to control agitation in dementia. BEO has proven strong antinociceptive and anti-allodynic properties and, in its bergapten-free form, it is completely devoid of phototoxicity. NanoBEO has been studied in vivo confirming the previously reported analgesic activity of BEO to which is now added its anti-itching properties. Due to the nanotechnology delivery system, the stability of titrated BEO components is guaranteed. Finally, the latter invention, currently under patent consideration, is smell-devoid allowing efficacy and safety to be established in double-blind clinical trials; until now the latter studies have been impeded in aromatherapy by the strong odor of essential oils. A clinical trial NCT04321889 has been designed to provide information about the efficacy and safety of NanoBEO on agitation and pain in patients suffering from severe dementia.
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14
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Scuteri D, Hamamura K, Sakurada T, Watanabe C, Sakurada S, Morrone LA, Rombolà L, Tonin P, Bagetta G, Corasaniti MT. Efficacy of Essential Oils in Pain: A Systematic Review and Meta-Analysis of Preclinical Evidence. Front Pharmacol 2021; 12:640128. [PMID: 33732159 PMCID: PMC7957371 DOI: 10.3389/fphar.2021.640128] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 01/18/2021] [Indexed: 12/21/2022] Open
Abstract
Background: The demand for essential oils (EOs) has been steadily growing over the years. This is mirrored by a substantial increase in research concerned with EOs also in the field of inflammatory and neuropathic pain. The purpose of this present systematic review and meta-analysis is to investigate the preclinical evidence in favor of the working hypothesis of the analgesic properties of EOs, elucidating whether there is a consistent rational basis for translation into clinical settings. Methods: A literature search has been conducted on databases relevant for medical scientific literature, i.e., PubMed/MEDLINE, Scopus, and Web of Science from database inception until November 2, 2020, following the PRISMA (Preferred Reporting Items for Systematic reviews and Meta-Analyses) criteria for systematic reviews and meta-analyses. Results: The search was conducted in order to answer the following PICOS (participants/population, interventions, comparisons, outcomes, and study design) question: are EOs efficacious in reducing acute nociceptive pain and/or neuropathic pain in mice experimental models? The search retrieved 2,491 records, leaving 954 studies to screen after the removal of duplicates. The title and abstract of all 954 studies were screened, which left 127 records to evaluate in full text. Of these, 30 articles were eligible for inclusion. Conclusion: Most studies (27) assessed the analgesic properties of EOs on acute nociceptive pain models, e.g. the acetic acid writhings test, the formalin test, and the hot plate test. Unfortunately, efficacy in neuropathic pain models, which are a more suitable model for human conditions of chronic pain, had fewer results (only three studies). Moreover, some methodologies raised concerns in terms of the risk of bias. Therefore, EOs with proven efficacy in both types of pain were corroborated by methodologically consistent studies, like the EO of bergamot, which should be studied in clinical trials to enhance the translational impact of preclinical modeling on clinical pain research.
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Affiliation(s)
- Damiana Scuteri
- Pharmacotechnology Documentation and Transfer Unit, Section of Preclinical and Translational Pharmacology, Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy.,Regional Center for Serious Brain Injuries, S. Anna Institute, Crotone, Italy
| | - Kengo Hamamura
- Laboratory of Chemical Pharmacology, Faculty of Pharmaceutical Sciences, Daiichi University of Pharmacy, Fukuoka, Japan
| | - Tsukasa Sakurada
- Center for Supporting Pharmaceutical Education, Faculty of Pharmaceutical Sciences, Daiichi University of Pharmacy, Fukuoka, Japan
| | - Chizuko Watanabe
- Department of Physiology and Anatomy, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Shinobu Sakurada
- Department of Physiology and Anatomy, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Luigi Antonio Morrone
- Section of Preclinical and Translational Pharmacology, Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy
| | - Laura Rombolà
- Section of Preclinical and Translational Pharmacology, Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy
| | - Paolo Tonin
- Regional Center for Serious Brain Injuries, S. Anna Institute, Crotone, Italy
| | - Giacinto Bagetta
- Pharmacotechnology Documentation and Transfer Unit, Section of Preclinical and Translational Pharmacology, Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy
| | - Maria Tiziana Corasaniti
- Department of Health Sciences, University "Magna Graecia" of Catanzaro, Catanzaro, Italy.,School of Hospital Pharmacy, University "Magna Graecia" of Catanzaro, Catanzaro, Italy
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15
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Bo JZ, Xue L, Li S, Yin JW, Li ZY, Wang X, Wang JF, Zhang YS. D-serine reduces memory impairment and neuronal damage induced by chronic lead exposure. Neural Regen Res 2021; 16:836-841. [PMID: 33229717 PMCID: PMC8178793 DOI: 10.4103/1673-5374.297086] [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] [Indexed: 11/04/2022] Open
Abstract
Although exogenous D-serine has been applied as a neural regulatory intervention in many studies, the role played by D-serine in hippocampal injuries caused by lead exposure remains poorly understood. Rat models of chronic lead exposure were established through the administration of 0.05% lead acetate for 8 weeks. Simultaneously, rats were administered 30 or 60 mg/kg D-serine, intraperitoneally, twice a day. Our results showed that D-serine treatment shortened the escape latency from the Morris water maze, increased the number of times that mice crossed the original platform location, and alleviated the pathological damage experienced by hippocampal neurons in response to lead exposure. Although D-serine administration did not increase the expression levels of the N-methyl-D-aspartate receptor subtype 2B (NR2B) in the hippocampi of lead-exposed rats, 60 mg/kg D-serine treatment restored the expression levels of NR2A, which are reduced by lead exposure. These findings suggested that D-serine can alleviate learning and memory impairments induced by lead exposure and that the underlying mechanism is associated with the increased expression of NR2A in the hippocampus. This study was approved by the Animal Ethics Committee of North China University of Science and Technology, China (approval No. LX2018155) on December 21, 2018.
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Affiliation(s)
- Jian-Zhu Bo
- College of Public Health, North China University of Science and Technology, Tangshan, Hebei Province, China
| | - Ling Xue
- College of Public Health, North China University of Science and Technology, Tangshan, Hebei Province, China
| | - Shuang Li
- Laboratory Animal Center, North China University of Science and Technology, Tangshan, Hebei Province, China
| | - Jing-Wen Yin
- College of Public Health, North China University of Science and Technology, Tangshan, Hebei Province, China
| | - Zheng-Yao Li
- College of Public Health, North China University of Science and Technology, Tangshan, Hebei Province, China
| | - Xi Wang
- College of Public Health, North China University of Science and Technology, Tangshan, Hebei Province, China
| | - Jun-Feng Wang
- College of Public Health, North China University of Science and Technology, Tangshan, Hebei Province, China
| | - Yan-Shu Zhang
- College of Public Health; Laboratory Animal Center, North China University of Science and Technology, Tangshan, Hebei Province, China
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16
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Gentile D, Berliocchi L, Russo R, Bagetta G, Corasaniti MT. Effects of the autophagy modulators d-limonene and chloroquine on vimentin levels in SH-SY5Y cells. Biochem Biophys Res Commun 2020; 533:764-769. [PMID: 32988589 PMCID: PMC7518972 DOI: 10.1016/j.bbrc.2020.09.073] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Accepted: 09/20/2020] [Indexed: 01/07/2023]
Abstract
The molecular target and mechanism by which d-limonene induces LC3 lipidation and autophagosome formation remain elusive. Here, we report that this monoterpene rapidly enhances Ca2+ levels in SH-SY5Y cells; yet this effect does not lead to calpain- or caspase-mediated proteolysis of α-spectrin, nor calpain activity is required for the established enhancement of LC3-II levels by d-limonene. However, d-limonene rapidly reduced vimentin levels, an unexpected effect also induced by the autophagy inhibitor chloroquine (CQ). The magnitude of vimentin reduction parallels accumulation of LC3-II caused by a brief incubation with d-limonene or CQ. For longer exposure (48 h), d-limonene does not reduce vimentin, nor it increases LC3-II levels; conversely, a clear reduction of vimentin along with a massive accumulation of LC3-II is evident in cells treated with CQ. Vimentin participates in organelle positioning and in other cellular processes that have linked this intermediate filament protein to various diseases, including cancer, inflammatory and autoimmune disorders, and to virus replication and internalization. Our findings suggest an inverse relationship between vimentin reduction and LC3-II accumulation, whose causal link needs to be examined. Further experiments are needed to dissect the role of vimentin reduction in the mechanisms through which CQ impairs fusion of autophagosome with lysosomes as well as in other effects of this drug.
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Affiliation(s)
- Debora Gentile
- Department of Health Sciences, University "Magna Graecia" of Catanzaro, Campus Universitario "Salvatore Venuta", Viale Europa, 88100, Catanzaro, Italy
| | - Laura Berliocchi
- Department of Health Sciences, University "Magna Graecia" of Catanzaro, Campus Universitario "Salvatore Venuta", Viale Europa, 88100, Catanzaro, Italy
| | - Rossella Russo
- Department of Pharmacy, Health and Nutritional Sciences, Section of Preclinical and Translational Pharmacology, University of Calabria, Via Pietro Bucci, 87036, Rende (Cosenza), Italy
| | - Giacinto Bagetta
- Department of Pharmacy, Health and Nutritional Sciences, Section of Preclinical and Translational Pharmacology, University of Calabria, Via Pietro Bucci, 87036, Rende (Cosenza), Italy
| | - Maria Tiziana Corasaniti
- Department of Health Sciences, University "Magna Graecia" of Catanzaro, Campus Universitario "Salvatore Venuta", Viale Europa, 88100, Catanzaro, Italy.
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17
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Cui Y, Che Y, Wang H. Bergamot essential oil attenuate aluminum-induced anxiety-like behavior through antioxidation, anti-inflammatory and GABA regulation in rats. Food Chem Toxicol 2020; 145:111766. [PMID: 32971212 DOI: 10.1016/j.fct.2020.111766] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 09/06/2020] [Accepted: 09/17/2020] [Indexed: 02/07/2023]
Abstract
A large number of studies showed that aluminum (Al) has potential neurotoxicity to human and animal bodies. Al-treated animals showed anxiety-like behavior, oxidative stress, neuroinflammation and γ-aminobutyric acid (GABA) changes. Bergamot essential oil (BEO) is a kind of well-known plant extract from the fresh fruit of bergamot. Previous studies suggested that BEO improved mood and relieved symptoms of stress-induced anxiety. This study was designed to study the effects of BEO on anxiety-like behavior, oxidative stress, neuroinflammation and GABA system in aluminum trichloride (AlCl3) treated rats. Results showed that AlCl3 exposure induced anxiety-like behavior in the elevated plus maze and the open field test. Moreover, AlCl3 exposure decreased the level of GABA and the activity of glutathione peroxidase (GPx), catalase (CAT) and superoxide dismutase (SOD) in the hippocampus (HP) and the frontal cortex (FC). In addition, AlCl3 exposure increased the levels of malondialdehyde (MDA) and 8-hydroxy-2'-deoxyguanosine (8-OHdG) and the levels of interleukin-1 beta (IL-1β), interleukin-6 (IL-6) and tumor necrosis factor-alpha (TNF-α) in the HP and the FC. To the contrary, co-administration of BEO and AlCl3 improved the anxiety-like behavior, GABA system, oxidative stress and neuroinflammation. These results indicated that BEO can alleviate the anxiety-like behavior of AlCl3-exposed rats through the combined action of antioxidant, anti-inflammatory and GABA regulation.
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Affiliation(s)
- Yonghua Cui
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, People's Republic of China; Medical College of Soochow University, Suzhou, 215123, People's Republic of China; School of Food Science and Technology, Jiangnan University, Wuxi, 214122, People's Republic of China; National Engineering Research Center for Functional Food, Wuxi, 214122, People's Republic of China.
| | - Yi Che
- Medical College of Soochow University, Suzhou, 215123, People's Republic of China
| | - Hongxin Wang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, People's Republic of China; School of Food Science and Technology, Jiangnan University, Wuxi, 214122, People's Republic of China; National Engineering Research Center for Functional Food, Wuxi, 214122, People's Republic of China.
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18
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Lizarraga-Valderrama LR. Effects of essential oils on central nervous system: Focus on mental health. Phytother Res 2020; 35:657-679. [PMID: 32860651 DOI: 10.1002/ptr.6854] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Revised: 07/18/2020] [Accepted: 08/01/2020] [Indexed: 01/14/2023]
Abstract
Essential oils have been used as remedies since ancient times for the treatment of numerous illnesses on account of their wide range of biological activities. Recent preclinical and clinical studies have shown varying pharmacological responses in the nervous system leading to anxiolytic, antidepressant, sedative, and anticonvulsant effects. Experimentation in animal models has evidenced the involvement of multiple neurotransmitter systems in the mode of action of essential oils, resulting in measurable physiological effects in the brain. Additionally, clinical trials have demonstrated the influence of essential oils in physiological parameters such as blood pressure, heart rate, respiratory rate, brain waves composition, and cortisol serum levels with concomitant psychological effects. Although there is growing evidence of measurable effects of essential oils in animal brains, more clinical research is required to validate their influence in the human central nervous system. This will enable the development of essential oil-based drugs for the treatment of mental illnesses such as depression, anxiety and dementia.
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Affiliation(s)
- Lorena R Lizarraga-Valderrama
- Research and Innovation, University of Plymouth, Plymouth, UK.,Made for Life Organics, Cornwall, UK.,School of Life Sciences, University of Nottingham, Nottinghamshire, UK
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19
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Leherbauer I, Stappen I. Selected essential oils and their mechanisms for therapeutic use against public health disorders. An overview. Z NATURFORSCH C 2020; 75:205-223. [PMID: 32623381 DOI: 10.1515/znc-2020-0007] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 06/04/2020] [Indexed: 12/27/2022]
Abstract
Today, the numbers of people suffering from lifestyle diseases like diabetes, obesity, allergies and depression increases mainly in industrialised states. That does not only lower patients' quality of life but also severely stresses the health care systems of these countries. Essential oils (EO) have been in use as therapeutic remedies for centuries against various complaints, but still their effectiveness is being underestimated. In the last decades, a great number of controlled studies have supported efficacy of these volatile secondary plant metabolites for various therapeutic indications. Besides others, EO has antidepressant, anti-obesity, antidiabetic, antifirogenic and antiallergic effects. In this review the pharmacological mechanisms for selected EO are summarised and discussed with the main attention on their impact against public health disorders. Additionally, toxicity of these oils as well as possible drug interactions is presented.
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Affiliation(s)
- Ingrid Leherbauer
- Department of Pharmaceutical Chemistry, University of Vienna, Vienna, Austria
| | - Iris Stappen
- Department of Pharmaceutical Chemistry, University of Vienna, Vienna, Austria
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20
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Straface M, Makwana R, Palmer A, Rombolà L, Aleong JC, Morrone LA, Sanger GJ. Inhibition of Neuromuscular Contractions of Human and Rat Colon by Bergamot Essential Oil and Linalool: Evidence to Support a Therapeutic Action. Nutrients 2020; 12:nu12051381. [PMID: 32408669 PMCID: PMC7284490 DOI: 10.3390/nu12051381] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 05/06/2020] [Accepted: 05/09/2020] [Indexed: 12/20/2022] Open
Abstract
Bergamot essential oil (BEO) added to food and drink promotes a citrus flavour. Folklore suggests benefits on gastrointestinal functions but with little supporting evidence. BEO and major constituents (linalool, limonene, linalyl acetate) were therefore examined for any ability to influence neuromuscular contractions of human and rat colon. Circular muscle strips (macroscopically-normal human colon obtained following ethical approval at cancer surgery; Sprague-Dawley rats) were suspended in baths (Krebs solution; 37 °C; 5% CO2 in O2) for measurement of neuronally-mediated contractions (prevented by tetrodotoxin or atropine) evoked by electrical field stimulation (5 Hz, 0.5 ms pulse width, 10s/minute, maximally-effective voltage), or contractions evoked by KCl (submaximally-effective concentrations). BEO and each constituent concentration dependently inhibited neuronally-mediated and KCl-induced contractions. In human: apparent pIC50 for BEO (volume/volume Krebs), respectively, 3.8 ± 0.3 and 4.4 ± 0.3; Imax 55.8% ± 4.2% and 37.5% ± 4.2%. For the constituents, the rank order of potency differed in human (linalool > limonene >> linalyl-acetate) and rat colon (linalyl-acetate > limonene = linalool), but rank order of efficacy was similar (linalool >> (BEO) = linalyl-acetate >> limonene). Thus, linalool had high efficacy but greater potency in human colon (Imax 76.8% ± 6.9%; pIC50 6.7 ± 0.2; n = 4) compared with rat colon (Imax 75.3% ± 1.9%; pIC50 5.8 ± 0.1; n = 4). The ability of BEO and linalool to inhibit human colon neuromuscular contractility provides a mechanism for use as complementary treatments of intestinal disorders.
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Affiliation(s)
- Marilisa Straface
- Preclinical and Translational Pharmacology, Department of Pharmacy, Health Science and Nutrition, University of Calabria, 87036 Rende, Italy; (M.S.); (L.R.); (L.A.M.)
- Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London E1 4NS, UK; (R.M.); (A.P.)
| | - Raj Makwana
- Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London E1 4NS, UK; (R.M.); (A.P.)
| | - Alexandra Palmer
- Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London E1 4NS, UK; (R.M.); (A.P.)
| | - Laura Rombolà
- Preclinical and Translational Pharmacology, Department of Pharmacy, Health Science and Nutrition, University of Calabria, 87036 Rende, Italy; (M.S.); (L.R.); (L.A.M.)
| | - Joanne Chin Aleong
- Department of Pathology, Royal London Hospital, Barts Health NHS Trust, London E1 1BB, UK;
| | - Luigi Antonio Morrone
- Preclinical and Translational Pharmacology, Department of Pharmacy, Health Science and Nutrition, University of Calabria, 87036 Rende, Italy; (M.S.); (L.R.); (L.A.M.)
| | - Gareth J. Sanger
- Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London E1 4NS, UK; (R.M.); (A.P.)
- Correspondence: ; Tel.: +44-(0)-207-882-6027
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21
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Role of 5-HT1A Receptor in the Anxiolytic-Relaxant Effects of Bergamot Essential Oil in Rodent. Int J Mol Sci 2020; 21:ijms21072597. [PMID: 32283606 PMCID: PMC7177770 DOI: 10.3390/ijms21072597] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 04/04/2020] [Accepted: 04/07/2020] [Indexed: 12/20/2022] Open
Abstract
The essential oil obtained by the fresh fruit of Citrus bergamia Risso et Poiteau is used worldwide in aromatherapy to reduce pain, facilitate sleep induction, and/or minimize the effects of stress-induced anxiety. Preclinical pharmacological data demonstrate that bergamot essential oil (BEO) modulates specific neurotransmissions and shows an anxiolytic-relaxant effect not superimposable to that of the benzodiazepine diazepam, suggesting that neurotransmissions, other than GABAergic, could be involved. Several studies on essential oils indicate a role for serotonergic (5-HT) neurotransmission in anxiety. Interestingly, among serotonergic receptors, the 5-HT1A subtype seems to play a key role in the control of anxiety. Here, we report that modulation of the 5-HT1A receptor by selective agonist ((±)8-OH-DPAT) or antagonist (WAY-100635) may influence some of the anxiolytic-relaxant effects of BEO in Open Field and Elevated Plus Maze tests.
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22
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Zhang N, Yao L. Anxiolytic Effect of Essential Oils and Their Constituents: A Review. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:13790-13808. [PMID: 31148444 DOI: 10.1021/acs.jafc.9b00433] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Essential oils are usually used in aromatherapy to alleviate anxiety symptoms. In comparison to traditional drugs, essential oils have fewer side effects and more diversified application ways, including inhalation. This review provides a comprehensive overview of studies on anxiolytic effects of essential oils in preclinical and clinical trials. Most of the essential oils used in clinical studies have been proven to be anxiolytic in animal models. Inhalation and oral administration were two common methods for essential oil administration in preclinical and clinical trials. Massage was only used in the clinical trials, while intraperitoneal injection was only used in the preclinical trails. In addition to essential oils that are commonly used in aromatherapy, essential oils from many folk medicinal plants have also been reported to be anxiolytic. More than 20 compounds derived from essential oils have shown an anxiolytic effect in rodents, while two-thirds of them are alcohols and terpenes. Monoamine neurotransmitters, amino acid neurotransmitters, and the hypothalamic-pituitary-adrenal axis are thought to play important roles in the anxiolytic effects of essential oils.
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23
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Scuteri D, Rombolá L, Tridico L, Mizoguchi H, Watanabe C, Sakurada T, Sakurada S, Corasaniti MT, Bagetta G, Morrone LA. Neuropharmacological Properties of the Essential Oil of Bergamot for the Clinical Management of Pain-Related BPSDs. Curr Med Chem 2019. [PMID: 29521195 DOI: 10.2174/0929867325666180307115546] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
BACKGROUND Alzheimer's Disease (AD) accounts for approximately 50% of all cases of dementia and, in spite of the great effort for the development of disease-modifying drugs, a definitive treatment of cognitive impairment is not available yet. A perfect adherence to the current therapy of cognitive decline is needed for a better control of the disease and this is proven to reduce, though not completely abolish, the associated Behavioural and Psychological Symptoms of Dementia (BPSDs) from occurring. This cluster of symptoms, remarkably affecting patients' health-related quality of life (HRQL), is tightly associated with pain states. Antipsychotics are the only treatment for BPSDs. However, these drugs are more effective and safer in the short-term (6-12 weeks), they are able to manage aggression but not agitation and they cannot control pain. Aromatherapy with Melissa officinalis and Lavandula officinalis has been employed to handle BPSDs, but it has not provided strong evidence to offer relief from pain. OBJECTIVE Bergamot Essential Oil (BEO) exerts antinociceptive activity through several pharmacological mechanisms: in particular, it is able to enhance autophagy, a process undergoing derangement in chronic pain. Thus, the sound pharmacological basis for clinical translation of aromatherapy with BEO in the treatment of BPSDs has been pointed out. CONCLUSION The antinociceptive effects elicited by BEO in experimental pain models make it a possible candidate for the pharmacological management of pain-related BPSDs.
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Affiliation(s)
- Damiana Scuteri
- Department of Pharmacy, Health Science and Nutrition, Section of Translational Pharmacology, University of Calabria, 87036 Rende (CS), Italy
| | - Laura Rombolá
- Department of Pharmacy, Health Science and Nutrition, Section of Translational Pharmacology, University of Calabria, 87036 Rende (CS), Italy
| | - Laura Tridico
- Department of Pharmacy, Health Science and Nutrition, Section of Translational Pharmacology, University of Calabria, 87036 Rende (CS), Italy
| | - Hirokazu Mizoguchi
- Department of Physiology and Anatomy, Tohoku Pharmaceutical University, Sendai, Japan
| | - Chizuko Watanabe
- Department of Physiology and Anatomy, Tohoku Pharmaceutical University, Sendai, Japan
| | - Tsukasa Sakurada
- Department of Physiology and Anatomy, Tohoku Pharmaceutical University, Sendai, Japan
| | - Shinobu Sakurada
- First Department of Pharmacology, Daiichi College of Pharmaceutical Sciences, Fukuoka, Japan
| | - Maria T Corasaniti
- Department of Health Science, University Magna Graecia, Catanzaro, Italy
| | - Giacinto Bagetta
- Department of Pharmacy, Health Science and Nutrition, Section of Translational Pharmacology, University of Calabria, 87036 Rende (CS), Italy
| | - Luigi A Morrone
- Department of Pharmacy, Health Science and Nutrition, Section of Translational Pharmacology, University of Calabria, 87036 Rende (CS), Italy
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24
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Anxiolytic-Like Effects of Bergamot Essential Oil Are Insensitive to Flumazenil in Rats. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2019; 2019:2156873. [PMID: 31485242 PMCID: PMC6710760 DOI: 10.1155/2019/2156873] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 06/20/2019] [Accepted: 07/24/2019] [Indexed: 11/18/2022]
Abstract
Anxiety disorders are one of the most common mental disorders, and benzodiazepines (BDZs), acting on gamma-aminobutyric acid type A (GABA-A) receptor complex, represent the most common antianxiety medications in the world. However, chronic BDZ use elicits several adverse reactions. Reportedly, aromatherapy is safer for the management of anxiety. Bergamot essential oil (BEO) extracted from Citrus bergamia Risso et Poiteau fruit, like other essential oils, is widely used in aromatherapy to relieve symptoms of stress-induced anxiety. Interestingly, preclinical data indicate that BEO induces anxiolytic-like/relaxant effects in animal behavioural tasks not superimposable to those of benzodiazepine diazepam. To better elucidate the involvement of GABAergic transmission, the present study examines the effects of pretreatment with flumazenil (FLZ), a benzodiazepine site antagonist, on BEO effects using open-field task (OFT) in rats. The data yielded show that FLZ does not significantly affect behavioural effects of the phytocomplex. These results demonstrate the lack of overlapping between BEO and BDZ behavioural effects, contributing to the characterization of the neurobiological profile of the essential oil for its rational use in aromatherapy.
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Scuteri D, Rombolà L, Morrone LA, Bagetta G, Sakurada S, Sakurada T, Tonin P, Corasaniti MT. Neuropharmacology of the Neuropsychiatric Symptoms of Dementia and Role of Pain: Essential Oil of Bergamot as a Novel Therapeutic Approach. Int J Mol Sci 2019; 20:E3327. [PMID: 31284573 PMCID: PMC6651821 DOI: 10.3390/ijms20133327] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 06/24/2019] [Accepted: 07/05/2019] [Indexed: 01/03/2023] Open
Abstract
Aging of the population makes of dementia a challenge for health systems worldwide. The cognitive disturbance is a serious but not the only issue in dementia; behavioral and psychological syndromes known as neuropsychiatric symptoms of dementia remarkably reduce the quality of life. The cluster of symptoms includes anxiety, depression, wandering, delusions, hallucinations, misidentifications, agitation and aggression. The pathophysiology of these symptoms implicates all the neurotransmitter systems, with a pivotal role for the glutamatergic neurotransmission. Imbalanced glutamatergic and GABAergic neurotransmissions, over-activation of the extrasynaptic N-methyl-D-aspartate (NMDA) receptors and alterations of the latter have been linked to the development of neuropsychiatric symptoms experienced by almost the entire demented population. Drugs with efficacy and safety for prevention or long term treatment of these disorders are not available yet. Aromatherapy provides the best evidence for positive outcomes in the control of agitation, the most resistant symptom. Demented patients often cannot verbalize pain, resulting in unrelieved symptoms and contributing to agitation. Bergamot essential oil provides extensive preclinical evidence of analgesic properties. Incidentally, the essential oil of bergamot induces anxyolitic-like effects devoid of sedation, typical of benzodiazepines, with a noteworthy advantage for demented patients. These data, together with the reported safety profile, form the rational basis for bergamot as a neurotherapeutic to be trialed for the control of behavioral and psychological symptoms of dementia.
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Affiliation(s)
- Damiana Scuteri
- Preclinical and Translational Pharmacology, Department of Pharmacy, Health Science and Nutrition, University of Calabria, 87036 Rende, Italy
| | - Laura Rombolà
- Preclinical and Translational Pharmacology, Department of Pharmacy, Health Science and Nutrition, University of Calabria, 87036 Rende, Italy
| | - Luigi Antonio Morrone
- Preclinical and Translational Pharmacology, Department of Pharmacy, Health Science and Nutrition, University of Calabria, 87036 Rende, Italy
| | - Giacinto Bagetta
- Preclinical and Translational Pharmacology, Department of Pharmacy, Health Science and Nutrition, University of Calabria, 87036 Rende, Italy.
| | - Shinobu Sakurada
- Department of Physiology and Anatomy, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan
| | - Tsukasa Sakurada
- Daiichi College of Pharmaceutical Sciences-First Department of Pharmacology Fukuoka, Fukuoka 815-8511, Japan
| | - Paolo Tonin
- Regional Center for Serious Brain Injuries, S. Anna Institute, 88900 Crotone, Italy
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Perna S, Spadaccini D, Botteri L, Girometta C, Riva A, Allegrini P, Petrangolini G, Infantino V, Rondanelli M. Efficacy of bergamot: From anti-inflammatory and anti-oxidative mechanisms to clinical applications as preventive agent for cardiovascular morbidity, skin diseases, and mood alterations. Food Sci Nutr 2019; 7:369-384. [PMID: 30847114 PMCID: PMC6392855 DOI: 10.1002/fsn3.903] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 11/07/2018] [Accepted: 11/09/2018] [Indexed: 12/14/2022] Open
Abstract
We summarize the effects of bergamot (extract, juice, essential oil, and polyphenolic fraction) on cardiovascular, bone, inflammatory, skin diseases, mood alteration, anxiety, pain, and stress. This review included a total of 31 studies (20 studies on humans with 1709 subjects and 11 in animals (rats and mice)). In humans, bergamot-derived extract (BE) exerts positive effects on hyperlipidemia with an oral dose from 150 mg to 1000 mg/day of flavonoids administered from 30 to 180 days, demonstrating an effect on body weight and in modulating total cholesterol, triglycerides, LDL, and HDL. Studies in animals confirm promising data on glucose control (500/1000 mg/day of BE with a treatment lasting 30 days) are available in rats. In animals models, bergamot essential oil (BEO, 10 mg/kg or 20 mg/kg daily for 20 weeks) increases bone volume, decreases psoriatic plaques, increases skin collagen content, and promotes hair growth. Bergamot juice (20 mg/kg) is promising in terms of pro-inflammatory cytokine reduction. In humans, aromatherapy (from 15 to 30 min) does not appear to be useful in order to reduce stress, anxiety, and nausea, compared to placebo. Compared to baseline, BE topical application and BEO aromatherapy reduce blood diastolic and systolic pressure and could have a significant effect on improving mental conditions.
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Affiliation(s)
- Simone Perna
- Department of BiologyCollege of ScienceUniversity of BahrainZallaqBahrain
| | - Daniele Spadaccini
- Department of Public Health, Experimental and Forensic MedicineSection of Human Nutrition, Endocrinology and Nutrition UnitAzienda di Servizi alla PersonaUniversity of PaviaPaviaItaly
| | - Leonardo Botteri
- Department of Public Health, Experimental and Forensic MedicineSection of Human Nutrition, Endocrinology and Nutrition UnitAzienda di Servizi alla PersonaUniversity of PaviaPaviaItaly
| | - Carolina Girometta
- Department of Earth and Environmental SciencesMycology and Plant Pathology LaboratoryPaviaItaly
| | | | | | | | - Vittoria Infantino
- Department of Public Health, Experimental and Forensic MedicineSection of Human Nutrition, Endocrinology and Nutrition UnitAzienda di Servizi alla PersonaUniversity of PaviaPaviaItaly
- Department of Biomedical Science and Human OncologyUniversity of BariBariItaly
| | - Mariangela Rondanelli
- Department of Public Health, Experimental and Forensic MedicineSection of Human Nutrition, Endocrinology and Nutrition UnitAzienda di Servizi alla PersonaUniversity of PaviaPaviaItaly
- IRCCS Mondino FoundationPaviaItaly
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Figoli A, Marino T, Galiano F, Blasi E, Belsito E, Liguori A, Leggio A, Rombolà L, Morrone L. Potentiality of polymeric membranes in aromatherapy: Application to bergamot essential oil. Sep Purif Technol 2018. [DOI: 10.1016/j.seppur.2018.05.065] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Antinociceptive effect of inhalation of the essential oil of bergamot in mice. Fitoterapia 2018; 129:20-24. [DOI: 10.1016/j.fitote.2018.06.007] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 06/09/2018] [Accepted: 06/11/2018] [Indexed: 11/21/2022]
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Val-Laillet D, Elmore JS, Baines D, Naylor P, Naylor R. Long-term exposure to sensory feed additives during the gestational and postnatal periods affects sows' colostrum and milk sensory profiles, piglets' growth, and feed intake. J Anim Sci 2018; 96:3233-3248. [PMID: 29961882 PMCID: PMC6095397 DOI: 10.1093/jas/sky171] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Accepted: 06/25/2018] [Indexed: 11/12/2022] Open
Abstract
This study investigated the effect of feed supplementation in sows and/or their progeny with 2 sensory feed additives (FA1: limonene and cinnamaldehyde; FA2: menthol, carvone, and anethole) on sows' feed intake, body weight, fat deposition, and colostrum/milk composition, as well as piglets' feed intake growth and feed efficiency from birth to slaughter at postnatal day 160 (PND160). During the last third of gestation and the whole of lactation, sows were subjected to a control diet (C) or the same diet containing FA1 or FA2 at 0.1% of complete feed content. Colostrum/milk samples were taken at days 1, 14, and 28 of lactation for gas chromatography-mass spectrometry analyses. After weaning, the progeny was subjected to a control diet (C) or experimental diets with a sweetener (0.015%) but no other additive (S), or to diets with a sweetener and the additive FA1 (FA1S) or FA2 (FA2S). There was no effect of dietary treatment on sows' feed intake, body weight, or adiposity (P > 0.15 for all), but the sensory characteristics of their colostrum/milk were modified by the diet and diet*time interaction. Limonene concentrations were higher in FA1 samples from PND1 to PND28, whereas carvone and anethole concentrations were higher in FA2 samples from PND1 to PND28. The concentration of these 3 compounds increased with time in the respective groups where they were mostly detected. Menthol concentrations were higher in FA2 samples at PND14 and PND28, but there was no time effect. Overall, cinnamaldehyde was always below the detection range. Piglets born from FA1 and FA2 sows had higher body weight (P = 0.034 at PND160), average daily gain (ADG; P = 0.036 for PND0-160), and average daily feed intake (ADFI; P = 0.006 for PND28-160) than piglets born from C sows. Overall, piglets that were never exposed to FA or only after weaning had lower ADG (P = 0.030 for PND0-160) and ADFI (P = 0.016 for PND28-160) than piglets that were exposed to FA only via the maternal diet, the condition combining both pre- and post-natal exposure being intermediary. In conclusion, FA1 and FA2 provided to gestating and lactating sows increased the progeny's feed intake and growth, suggesting nutritional programming and/or sensory conditioning during the perinatal period. Addition of FA only in the progeny's diet was not beneficial.
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Affiliation(s)
- David Val-Laillet
- INRA, INSERM, Univ Rennes, Nutrition Metabolisms and Cancer, NuMeCan, Saint-Gilles, France
| | - J Stephen Elmore
- Department of Food and Nutritional Sciences, University of Reading, Whiteknights, Reading, UK
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Dosoky NS, Setzer WN. Biological Activities and Safety of Citrus spp. Essential Oils. Int J Mol Sci 2018; 19:E1966. [PMID: 29976894 PMCID: PMC6073409 DOI: 10.3390/ijms19071966] [Citation(s) in RCA: 145] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 07/01/2018] [Accepted: 07/03/2018] [Indexed: 12/13/2022] Open
Abstract
Citrus fruits have been a commercially important crop for thousands of years. In addition, Citrus essential oils are valuable in the perfume, food, and beverage industries, and have also enjoyed use as aromatherapy and medicinal agents. This review summarizes the important biological activities and safety considerations of the essential oils of sweet orange (Citrus sinensis), bitter orange (Citrus aurantium), neroli (Citrus aurantium), orange petitgrain (Citrus aurantium), mandarin (Citrus reticulata), lemon (Citrus limon), lime (Citrus aurantifolia), grapefruit (Citrus × paradisi), bergamot (Citrus bergamia), Yuzu (Citrus junos), and kumquat (Citrus japonica).
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Affiliation(s)
- Noura S Dosoky
- Aromatic Plant Research Center, 230 N 1200 E, Suite 102, Lehi, UT 84043, USA.
| | - William N Setzer
- Aromatic Plant Research Center, 230 N 1200 E, Suite 102, Lehi, UT 84043, USA.
- Department of Chemistry, University of Alabama in Huntsville, Huntsville, AL 35899, USA.
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Berliocchi L, Chiappini C, Adornetto A, Gentile D, Cerri S, Russo R, Bagetta G, Corasaniti MT. Early LC3 lipidation induced by d-limonene does not rely on mTOR inhibition, ERK activation and ROS production and it is associated with reduced clonogenic capacity of SH-SY5Y neuroblastoma cells. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2018; 40:98-105. [PMID: 29496180 DOI: 10.1016/j.phymed.2018.01.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Revised: 12/20/2017] [Accepted: 01/13/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND d-Limonene is a natural monoterpene abundant in Citrus essential oils. It is endowed with several biological activities, including inhibition of carcinogenesis and promotion of tumour regression. Recently, d-limonene has been shown to modulate autophagic markers in vitro at concentrations found in vivo, in clinical pharmacokinetic studies. Autophagy is an intracellular catabolic process serving as both an adaptive metabolic response and a quality control mechanism. Because autophagy defects have been linked to a wide range of human pathologies, including neurodegeneration and cancer, there is a need for new pharmacological tools to control deregulated autophagy. PURPOSE To better understand the effects of d-limonene on autophagy, to identify the molecular mechanisms through which this monoterpene rapidly triggers LC3 lipidation and to evaluate the role for autophagy in long-term effects of d-limonene. METHODS Human SH-SY5Y neuroblastoma, HepG2 hepatocellular carcinoma and MCF7 breast cancer cells were used. Endogenous LC3-II levels were evaluated by western blotting. Autophagic flux assay was performed using bafilomycin A1 and chloroquine. Intracellular distribution of LC3 protein was studied by confocal microscopy analysis of LC3B-GFP transduced cells. Expression of lysosomal-membrane protein LAMP-1 was assessed by immunofluorescence analysis. Phosphorylated levels of downstream substrates of mTOR kinase (p70S6 kinase, 4E-BP1, and ULK1) and ERK were analyzed by western blotting. Production of reactive oxygen species (ROS) was assessed by live confocal microscopy of cells loaded with CellROX® Green Reagent. Clonogenic assay was used to evaluate the ability of treated cells to proliferate and form colonies. RESULTS LC3 lipidation promoted by d-limonene correlates with autophagosome formation and stimulation of basal autophagy. LC3 lipidation does not rely on inhibition of mTOR kinase, which instead appears to be transiently activated. In addition, d-limonene rapidly activates ERK and stimulates ROS generation, yet none of these events is implicated in lipidation of LC3, which was only partly reduced by chelation of intracellular calcium. The early LC3 lipidation induced by d-limonene is associated with inhibition of clonogenic capacity which is reverted by the autophagy inhibitor chloroquine. CONCLUSIONS d-Limonene rapidly stimulates the autophagic flux in cultured cancer cells, which could be usefully exploited for therapeutic purposes.
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Affiliation(s)
- Laura Berliocchi
- Department of Health Sciences, University "Magna Graecia" of Catanzaro, Campus Universitario "Salvatore Venuta", V Livello Edificio delle Bioscienze, Viale Europa, 88100 Catanzaro, Italy
| | - Carlotta Chiappini
- Department of Health Sciences, University "Magna Graecia" of Catanzaro, Campus Universitario "Salvatore Venuta", V Livello Edificio delle Bioscienze, Viale Europa, 88100 Catanzaro, Italy
| | - Annagrazia Adornetto
- Department of Pharmacy, Health and Nutritional Sciences, Section of Preclinical and Translational Pharmacology, University of Calabria, 87036 Rende (Cosenza), Italy
| | - Debora Gentile
- Department of Health Sciences, University "Magna Graecia" of Catanzaro, Campus Universitario "Salvatore Venuta", V Livello Edificio delle Bioscienze, Viale Europa, 88100 Catanzaro, Italy
| | - Silvia Cerri
- Center for Research in Neurodegenerative Diseases, C. Mondino National Neurological Institute, 27100 Pavia, Italy
| | - Rossella Russo
- Department of Pharmacy, Health and Nutritional Sciences, Section of Preclinical and Translational Pharmacology, University of Calabria, 87036 Rende (Cosenza), Italy
| | - Giacinto Bagetta
- Department of Pharmacy, Health and Nutritional Sciences, Section of Preclinical and Translational Pharmacology, University of Calabria, 87036 Rende (Cosenza), Italy.
| | - Maria Tiziana Corasaniti
- Department of Health Sciences, University "Magna Graecia" of Catanzaro, Campus Universitario "Salvatore Venuta", V Livello Edificio delle Bioscienze, Viale Europa, 88100 Catanzaro, Italy.
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Rombolà L, Tridico L, Scuteri D, Sakurada T, Sakurada S, Mizoguchi H, Avato P, Corasaniti MT, Bagetta G, Morrone LA. Bergamot Essential Oil Attenuates Anxiety-Like Behaviour in Rats. Molecules 2017; 22:molecules22040614. [PMID: 28398260 PMCID: PMC6154596 DOI: 10.3390/molecules22040614] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Revised: 04/07/2017] [Accepted: 04/09/2017] [Indexed: 11/16/2022] Open
Abstract
Preclinical studies have recently highlighted that bergamot essential oil (BEO) is endowed with remarkable neurobiolological effects. BEO can affect synaptic transmission, modulate electroencephalographic activity and it showed neuroprotective and analgesic properties. The phytocomplex, along with other essential oils, is also widely used in aromatherapy to minimize symptoms of stress-induced anxiety and mild mood disorders. However, only limited preclinical evidences are actually available. This study examined the anxiolytic/sedative-like effects of BEO using an open field task (OFT), an elevated plus-maze task (EPM), and a forced swimming task (FST) in rats. This study further compared behavioural effects of BEO to those of the benzodiazepine diazepam. Analysis of data suggests that BEO induces anxiolytic-like/relaxant effects in animal behavioural tasks not superimposable to those of the DZP. The present observations provide further insight to the pharmacological profile of BEO and support its rational use in aromatherapy.
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Affiliation(s)
- Laura Rombolà
- Department of Pharmacy, Health and Nutritional Sciences, Section of Preclinical and Translational Pharmacology, University of Calabria, 87036 Rende, Italy.
| | - Laura Tridico
- Department of Pharmacy, Health and Nutritional Sciences, Section of Preclinical and Translational Pharmacology, University of Calabria, 87036 Rende, Italy.
| | - Damiana Scuteri
- Department of Pharmacy, Health and Nutritional Sciences, Section of Preclinical and Translational Pharmacology, University of Calabria, 87036 Rende, Italy.
| | - Tsukasa Sakurada
- First Department of Pharmacology, Daiichi College of Pharmaceutical Sciences, 815-8511 Fukuoka, Japan.
| | - Shinobu Sakurada
- Department of Physiology and Anatomy, Tohoku Pharmaceutical University, 981-8558 Sendai, Japan.
| | - Hirokazu Mizoguchi
- Department of Physiology and Anatomy, Tohoku Pharmaceutical University, 981-8558 Sendai, Japan.
| | - Pinarosa Avato
- Department of Pharmacy-Drug Sciences, University of Bari Aldo Moro, IT-70125 Bari, Italy.
| | | | - Giacinto Bagetta
- Department of Pharmacy, Health and Nutritional Sciences, Section of Preclinical and Translational Pharmacology, University of Calabria, 87036 Rende, Italy.
| | - Luigi Antonio Morrone
- Department of Pharmacy, Health and Nutritional Sciences, Section of Preclinical and Translational Pharmacology, University of Calabria, 87036 Rende, Italy.
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Val-Laillet D, Meurice P, Clouard C. Familiarity to a Feed Additive Modulates Its Effects on Brain Responses in Reward and Memory Regions in the Pig Model. PLoS One 2016; 11:e0162660. [PMID: 27610625 PMCID: PMC5017780 DOI: 10.1371/journal.pone.0162660] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Accepted: 08/28/2016] [Indexed: 11/18/2022] Open
Abstract
Brain responses to feed flavors with or without a feed additive (FA) were investigated in piglets familiarized or not with this FA. Sixteen piglets were allocated to 2 dietary treatments from weaning until d 37: the naive group (NAI) received a standard control feed and the familiarized group (FAM) received the same feed added with a FA mainly made of orange extracts. Animals were subjected to a feed transition at d 16 post-weaning, and to 2-choice feeding tests at d 16 and d 23. Production traits of the piglets were assessed up to d 28 post-weaning. From d 26 onwards, animals underwent 2 brain imaging sessions (positron emission tomography of 18FDG) under anesthesia to investigate the brain activity triggered by the exposure to the flavors of the feed with (FA) or without (C) the FA. Images were analyzed with SPM8 and a region of interest (ROI)-based small volume correction (p < 0.05, k ≥ 25 voxels per cluster). The brain ROI were selected upon their role in sensory evaluation, cognition and reward, and included the prefrontal cortex, insular cortex, fusiform gyrus, limbic system and corpus striatum. The FAM animals showed a moderate preference for the novel post-transition FA feed compared to the C feed on d 16, i.e., day of the feed transition (67% of total feed intake). The presence or absence of the FA in the diet from weaning had no impact on body weight, average daily gain, and feed efficiency of the animals over the whole experimental period (p ≥ 0.10). Familiar feed flavors activated the prefrontal cortex. The amygdala, insular cortex, and prepyriform area were only activated in familiarized animals exposed to the FA feed flavor. The perception of FA feed flavor in the familiarized animals activated the dorsal striatum differently than the perception of the C feed flavor in naive animals. Our data demonstrated that the perception of FA in familiarized individuals induced different brain responses in regions involved in reward anticipation and/or perception processes than the familiar control feed flavor in naive animals. Chronic exposure to the FA might be necessary for positive hedonic effects, but familiarity only cannot explain them.
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A Systematic Review of the Anxiolytic-Like Effects of Essential Oils in Animal Models. Molecules 2015; 20:18620-60. [PMID: 26473822 PMCID: PMC6332383 DOI: 10.3390/molecules201018620] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Revised: 09/24/2015] [Accepted: 10/02/2015] [Indexed: 01/22/2023] Open
Abstract
The clinical efficacy of standardized essential oils (such as Lavender officinalis), in treating anxiety disorders strongly suggests that these natural products are an important candidate source for new anxiolytic drugs. A systematic review of essential oils, their bioactive constituents, and anxiolytic-like activity is conducted. The essential oil with the best profile is Lavendula angustifolia, which has already been tested in controlled clinical trials with positive results. Citrus aurantium using different routes of administration also showed significant effects in several animal models, and was corroborated by different research groups. Other promising essential oils are Citrus sinensis and bergamot oil, which showed certain clinical anxiolytic actions; along with Achillea wilhemsii, Alpinia zerumbet, Citrus aurantium, and Spiranthera odoratissima, which, like Lavendula angustifolia, appear to exert anxiolytic-like effects without GABA/benzodiazepine activity, thus differing in their mechanisms of action from the benzodiazepines. The anxiolytic activity of 25 compounds commonly found in essential oils is also discussed.
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Role of natural antioxidants and potential use of bergamot in treating rheumatoid arthritis. PHARMANUTRITION 2015. [DOI: 10.1016/j.phanu.2015.03.002] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Navarra M, Mannucci C, Delbò M, Calapai G. Citrus bergamia essential oil: from basic research to clinical application. Front Pharmacol 2015; 6:36. [PMID: 25784877 PMCID: PMC4345801 DOI: 10.3389/fphar.2015.00036] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Accepted: 02/11/2015] [Indexed: 11/13/2022] Open
Abstract
Citrus bergamia Risso et Poiteau, also known as "Bergamot," is a plant belonging to the Rutaceae family, defined as a hybrid of bitter orange and lemon. It is an endemic plant of the Calabria region (Italy). Bergamot fruit is primarily used for the extraction of its essential oil (bergamot essential oil: BEO), employed in perfume, cosmetics, food, and confections. The aim of this review was to collect recent data from the literature on C. bergamia essential oil and, through a critical analysis, focus on safety and the beneficial effects on human health. Clinical studies on the therapeutic applications of BEO exclusively focus on the field of aromatherapy, suggesting that its use can be useful for reducing anxiety and stress.
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Affiliation(s)
- Michele Navarra
- Department of Drug Sciences and Products for Health, University of MessinaMessina, Italy
| | - Carmen Mannucci
- Department of Clinical and Experimental Medicine, University of MessinaMessina, Italy
| | | | - Gioacchino Calapai
- Department of Clinical and Experimental Medicine, University of MessinaMessina, Italy
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Exploitation of cytotoxicity of some essential oils for translation in cancer therapy. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2015; 2015:397821. [PMID: 25722735 PMCID: PMC4334976 DOI: 10.1155/2015/397821] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 11/30/2014] [Accepted: 01/13/2015] [Indexed: 01/07/2023]
Abstract
Essential oils are complex mixtures of several components endowed with a wide range of biological activities, including antiseptic, anti-inflammatory, spasmolytic, sedative, analgesic, and anesthetic properties. A growing body of scientific reports has recently focused on the potential of essential oils as anticancer treatment in the attempt to overcome the development of multidrug resistance and important side effects associated with the antitumor drugs currently used. In this review we discuss the literature on the effects of essential oils in in vitro and in vivo models of cancer, focusing on the studies performed with the whole phytocomplex rather than single constituents.
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KATSUYAMA S, OTOWA A, KAMIO S, SATO K, YAGI T, KISHIKAWA Y, KOMATSU T, BAGETTA G, SAKURADA T, NAKAMURA H. Effect of plantar subcutaneous administration of bergamot essential oil and linalool on formalin-induced nociceptive behavior in mice . Biomed Res 2015; 36:47-54. [DOI: 10.2220/biomedres.36.47] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Soh KATSUYAMA
- Department of Clinical Pharmaceutics, Tohoku Pharmaceutical University
| | - Akira OTOWA
- Department of Clinical Pharmaceutics, Tohoku Pharmaceutical University
| | - Satomi KAMIO
- Department of Clinical Pharmaceutics, Tohoku Pharmaceutical University
| | - Kazuma SATO
- Department of Clinical Pharmaceutics, Tohoku Pharmaceutical University
| | - Tomomi YAGI
- Department of Clinical Pharmaceutics, Tohoku Pharmaceutical University
| | | | - Takaaki KOMATSU
- Department of Pharmacology, Daiichi College of Pharmaceutical Sciences
| | - Giacinto BAGETTA
- Department of Pharmacobiology and University Consortium for Adaptive Disorders and Headache, Section of Neuropharmacology of Normal and Pathological Neuronal Plasticity, University of Calabria
| | - Tsukasa SAKURADA
- Department of Pharmacology, Daiichi College of Pharmaceutical Sciences
| | - Hitoshi NAKAMURA
- Department of Clinical Pharmaceutics, Tohoku Pharmaceutical University
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Russo R, Cassiano MGV, Ciociaro A, Adornetto A, Varano GP, Chiappini C, Berliocchi L, Tassorelli C, Bagetta G, Corasaniti MT. Role of D-Limonene in autophagy induced by bergamot essential oil in SH-SY5Y neuroblastoma cells. PLoS One 2014; 9:e113682. [PMID: 25419658 PMCID: PMC4242674 DOI: 10.1371/journal.pone.0113682] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Accepted: 10/30/2014] [Indexed: 01/10/2023] Open
Abstract
Bergamot (Citrus bergamia, Risso et Poiteau) essential oil (BEO) is a well characterized, widely used plant extract. BEO exerts anxiolytic, analgesic and neuroprotective activities in rodents through mechanisms that are only partly known and need to be further investigated. To gain more insight into the biological effects of this essential oil, we tested the ability of BEO (0.005–0.03%) to modulate autophagic pathways in human SH-SY5Y neuroblastoma cells. BEO-treated cells show increased LC3II levels and appearance of dot-like formations of endogenous LC3 protein that colocalize with the lysosome marker LAMP-1. Autophagic flux assay using bafilomycin A1 and degradation of the specific autophagy substrate p62 confirmed that the observed increase of LC3II levels in BEO-exposed cells is due to autophagy induction rather than to a decreased autophagosomal turnover. Induction of autophagy is an early and not cell-line specific response to BEO. Beside basal autophagy, BEO also enhanced autophagy triggered by serum starvation and rapamycin indicating that the underlying mechanism is mTOR independent. Accordingly, BEO did not affect the phosphorylation of ULK1 (Ser757) and p70S6K (Thr389), two downstream targets of mTOR. Furthermore, induction of autophagy by BEO is beclin-1 independent, occurs in a concentration-dependent manner and is unrelated to the ability of BEO to induce cell death. In order to identify the active constituents responsible for these effects, the two most abundant monoterpenes found in the essential oil, d-limonene (125–750 µM) and linalyl acetate (62.5–375 µM), were individually tested at concentrations comparable to those found in 0.005–0.03% BEO. The same features of stimulated autophagy elicited by BEO were reproduced by d-limonene, which rapidly increases LC3II and reduces p62 levels in a concentration-dependent manner. Linalyl acetate was ineffective in replicating BEO effects; however, it greatly enhanced LC3 lipidation triggered by d-limonene.
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Affiliation(s)
- Rossella Russo
- Department of Pharmacy, Health and Nutritional Sciences, Section of Preclinical and Translational Pharmacology, University of Calabria, Rende, Cosenza, Italy
- * E-mail: (RR); (MTC)
| | | | - Antonella Ciociaro
- Department of Health Sciences, University “Magna Graecia” of Catanzaro, Catanzaro, Italy
| | - Annagrazia Adornetto
- Department of Pharmacy, Health and Nutritional Sciences, Section of Preclinical and Translational Pharmacology, University of Calabria, Rende, Cosenza, Italy
| | - Giuseppe Pasquale Varano
- Department of Pharmacy, Health and Nutritional Sciences, Section of Preclinical and Translational Pharmacology, University of Calabria, Rende, Cosenza, Italy
| | - Carlotta Chiappini
- Department of Health Sciences, University “Magna Graecia” of Catanzaro, Catanzaro, Italy
| | - Laura Berliocchi
- Department of Health Sciences, University “Magna Graecia” of Catanzaro, Catanzaro, Italy
| | - Cristina Tassorelli
- Headache Science Centre, National Neurological Institute “C. Mondino,” and Department of Brain and Behavioural Sciences, University of Pavia, Pavia, Italy
| | - Giacinto Bagetta
- Department of Pharmacy, Health and Nutritional Sciences, Section of Preclinical and Translational Pharmacology, University of Calabria, Rende, Cosenza, Italy
| | - Maria Tiziana Corasaniti
- Department of Health Sciences, University “Magna Graecia” of Catanzaro, Catanzaro, Italy
- * E-mail: (RR); (MTC)
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Cosentino M, Luini A, Bombelli R, Corasaniti MT, Bagetta G, Marino F. The Essential Oil of Bergamot Stimulates Reactive Oxygen Species Production in Human Polymorphonuclear Leukocytes. Phytother Res 2014; 28:1232-9. [DOI: 10.1002/ptr.5121] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Revised: 11/19/2013] [Accepted: 12/22/2013] [Indexed: 12/20/2022]
Affiliation(s)
- Marco Cosentino
- Center for Research in Medical Pharmacology; University of Insubria; Varese Italy
| | - Alessandra Luini
- Center for Research in Medical Pharmacology; University of Insubria; Varese Italy
| | - Raffaella Bombelli
- Center for Research in Medical Pharmacology; University of Insubria; Varese Italy
| | - Maria T. Corasaniti
- Department of Health Sciences; University ‘Magna Graecia’ of Catanzaro; Catanzaro Italy
| | - Giacinto Bagetta
- Department of Pharmacy, Health Science and Nutrition, Section of Preclinical and Translational Pharmacology; University of Calabria; Arcavacata di Rende Cosenza Italy
| | - Franca Marino
- Center for Research in Medical Pharmacology; University of Insubria; Varese Italy
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Ayan M, Tas U, Sogut E, Suren M, Gurbuzler L, Koyuncu F. Investigating the effect of aromatherapy in patients with renal colic. J Altern Complement Med 2012; 19:329-33. [PMID: 23072267 DOI: 10.1089/acm.2011.0941] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
AIM The aim of the present study was to investigate the usefulness of rose essential oil as a supplementary and adjunctive therapy for the relief of renal colic, specifically because rose essential oil is soothing and can act as a muscle relaxant. MATERIALS Eighty patients who were diagnosed with renal colic in the emergency room were included in the study, with ages ranging from 19 to 64 years. Half of the patients (n=40) were treated with conventional therapy (diclofenac sodium, 75 mg intramuscularly) plus placebo (physiological serum, 0.9% NaCl), while the other half (n=40) were given aromatherapy (rose essential oil) in addition to conventional therapy. In each patient, the severity of pain was evaluated using the Visual Analog Scale (VAS) (0 [no pain] to 10 [very severe pain]). FINDINGS The VAS values prior to the start of therapy, and 10 and 30 minutes after therapy were 8.18 ± 1.36, 5.60 ± 2.02, and 3.75 ± 2.08 for the conventional therapy plus placebo group, while for the conventional therapy plus aromatherapy group, the VAS values were 8.63 ± 1.03, 4.25 ± 1.72, and 1.08 ± 1.07, respectively. There was no statistically significant difference between the starting VAS values of the two groups, but the VAS values 10 or 30 minutes after the initiation of therapy were statistically lower in the group that received conventional therapy plus aromatherapy. CONCLUSION This study demonstrated that rose essential oil therapy in addition to conventional therapy effectively reduces renal colic pain.
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Affiliation(s)
- Murat Ayan
- Department of Emergency Medicine, Faculty of Medicine, Gaziosmanpasa University, Tokat, Turkey.
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Saiyudthong S, Marsden CA. Acute effects of bergamot oil on anxiety-related behaviour and corticosterone level in rats. Phytother Res 2010; 25:858-62. [PMID: 21105176 DOI: 10.1002/ptr.3325] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2009] [Revised: 08/22/2010] [Accepted: 09/16/2010] [Indexed: 11/08/2022]
Abstract
Bergamot essential oil (BEO), Citrus aurantium subsp. bergamia (Risso) Wright & Arn. (Rutaceae), is used widely in aromatherapy to reduce stress and anxiety despite limited scientific evidence. A previous study showed that BEO significantly increased gamma-aminobutyric acid levels in rat hippocampus, suggesting potential anxiolytic properties. The aim of this study was to investigate the effect of BEO (1.0%, 2.5% and 5.0% w/w) administered to rats on both anxiety-related behaviours (the elevated plus-maze (EPM) and hole-board tests) and stress-induced levels of plasma corticosterone in comparison with the effects of diazepam. Inhalation of BEO (1% and 2.5%) and injection of diazepam (1 mg/kg, i.p.) significantly increased the percentage of open arm entries on the EPM. The percentage time spent in the open arms was also significantly enhanced following administration of either BEO (2.5% and 5%) or diazepam. Total arm entries were significantly increased with the highest dose (5%), suggesting an increase in locomotor activity. In the hole-board test, 2.5% BEO and diazepam significantly increased the number of head dips. 2.5% BEO and diazepam attenuated the corticosterone response to acute stress caused by exposure to the EPM. In conclusion, both BEO and diazepam exhibited anxiolytic-like behaviours and attenuated HPA axis activity by reducing the corticosterone response to stress.
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Affiliation(s)
- Somrudee Saiyudthong
- Department of Physiology, Faculty of Medicine, Srinakharinwirot University, Bangkok, Thailand.
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The NADPH oxidase NOX2 controls glutamate release: a novel mechanism involved in psychosis-like ketamine responses. J Neurosci 2010; 30:11317-25. [PMID: 20739552 DOI: 10.1523/jneurosci.1491-10.2010] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Subanesthetic doses of NMDA receptor antagonist ketamine induce schizophrenia-like symptoms in humans and behavioral changes in rodents. Subchronic administration of ketamine leads to loss of parvalbumin-positive interneurons through reactive oxygen species (ROS), generated by the NADPH oxidase NOX2. However, ketamine induces very rapid alterations, in both mice and humans. Thus, we have investigated the role of NOX2 in acute responses to subanesthetic doses of ketamine. In wild-type mice, ketamine caused rapid (30 min) behavioral alterations, release of neurotransmitters, and brain oxidative stress, whereas NOX2-deficient mice did not display such alterations. Decreased expression of the subunit 2A of the NMDA receptor after repetitive ketamine exposure was also precluded by NOX2 deficiency. However, neurotransmitter release and behavioral changes in response to amphetamine were not altered in NOX2-deficient mice. Our results suggest that NOX2 is a major source of ROS production in the prefrontal cortex controlling glutamate release and associated behavioral alterations after acute ketamine exposure. Prolonged NOX2-dependent glutamate release may lead to neuroadaptative downregulation of NMDA receptor subunits.
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Bagetta G, Morrone LA, Rombolà L, Amantea D, Russo R, Berliocchi L, Sakurada S, Sakurada T, Rotiroti D, Corasaniti MT. Neuropharmacology of the essential oil of bergamot. Fitoterapia 2010; 81:453-61. [DOI: 10.1016/j.fitote.2010.01.013] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2009] [Revised: 01/02/2010] [Accepted: 01/10/2010] [Indexed: 01/25/2023]
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Intraplantar injection of bergamot essential oil into the mouse hindpaw: effects on capsaicin-induced nociceptive behaviors. INTERNATIONAL REVIEW OF NEUROBIOLOGY 2009. [PMID: 19607974 DOI: 10.1016/s0074-7742(09)85018-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/29/2023]
Abstract
Despite the increasing use of aromatherapy oils, there have not been many studies exploring the biological activities of bergamot (Citrus bergamia, Risso) essential oil (BEO). Recently, we have investigated the effects of BEO injected into the plantar surface of the hindpaw in the capsaicin test in mice. The intraplantar injection of capsaicin produced an intense and short-lived licking/biting response toward the injected hindpaw. The capsaicin-induced nociceptive response was reduced significantly by intraplantar injection of BEO. The essential oils of Clary Sage (Salvia sclarea), Thyme ct. linalool (linalool chemotype of Thymus vulgaris), Lavender Reydovan (Lavandula hybrida reydovan), and True Lavender (Lavandula angustifolia), had similar antinociceptive effects on the capsaicin-induced nociceptive response, while Orange Sweet (Citrus sinensis) essential oil was without effect. In contrast to a small number of pharmacological studies of BEO, there is ample evidence regarding isolated components of BEO which are also found in other essential oils. The most abundant compounds found in the volatile fraction are the monoterpene hydrocarbons, such as limonene, gamma-terpinene, beta-pinene, and oxygenated derivatives, linalool and linalyl acetate. Of these monoterpenes, the pharmacological activities of linalool have been examined. Following intraperitoneal (i.p.) administration in mice, linalool produces antinociceptive and antihyperalgesic effects in different animal models in addition to anti-inflammatory properties. Linalool also possesses anticonvulsant activity in experimental models of epilepsy. We address the importance of linalool or linalyl acetate in BEO-or the other essential oil-induced antinociception.
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Amantea D, Fratto V, Maida S, Rotiroti D, Ragusa S, Nappi G, Bagetta G, Corasaniti MT. Prevention of Glutamate Accumulation and Upregulation of Phospho-Akt may Account for Neuroprotection Afforded by Bergamot Essential Oil against Brain Injury Induced by Focal Cerebral Ischemia in Rat. INTERNATIONAL REVIEW OF NEUROBIOLOGY 2009; 85:389-405. [PMID: 19607983 DOI: 10.1016/s0074-7742(09)85027-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The effects of bergamot essential oil (BEO; Citrus bergamia, Risso) on brain damage caused by permanent focal cerebral ischemia in rat were investigated. Administration of BEO (0.1-0.5 ml/kg but not 1 ml/kg, given intraperitoneally 1 h before occlusion of the middle cerebral artery, MCAo) significantly reduced infarct size after 24 h permanent MCAo. The most effective dose (0.5 ml/kg) resulted in a significant reduction of infarct extension throughout the brain, especially in the medial striatum and the motor cortex as revealed by TTC staining of tissue slices. Microdialysis experiments show that BEO (0.5 ml/kg) did not affect basal amino acid levels, whereas it significantly reduced excitatory amino acid, namely aspartate and glutamate, efflux in the frontoparietal cortex typically observed following MCAo. Western blotting experiments demonstrated that these early effects were associated, 24 h after permanent MCAo, to a significant increase in the phosphorylation and activity of the prosurvival kinase, Akt. Indeed, BEO significantly enhanced the phosphorylation of the deleterious downstream kinase, GSK-3beta, whose activity is negatively regulated via phosphorylation by Akt.
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Affiliation(s)
- Diana Amantea
- Department of Pharmacobiology and Center of Neuropharmacology of Normal and Pathological Neuronal Plasticity, UCADH, University of Calabria, 87036 Cosenza, Italy
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