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Barros MVA, Teixeira KC, da Silva Santos L, Rocha BL, Prados CP, Dos Santos Pereira AK, da Silva Maia AM. Ultraviolet spectrophotometry as method to determine the concentration of β-myrcene released from chitosan in aqueous medium. J Pharmacol Toxicol Methods 2024; 127:107509. [PMID: 38701958 DOI: 10.1016/j.vascn.2024.107509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 03/30/2024] [Accepted: 04/30/2024] [Indexed: 05/06/2024]
Abstract
Myrcene (β-myrcene), found in essential oils from plant species such as hops and cannabis, has many advantageous properties, but its use is limited due to volatility and low solubility in water. One way to circumvent these limitations is to encapsulate the essential oils in a polymer matrix. However, these hydrophobic molecules are difficult to quantify when dispersed in water. Seeking to study the release of this terpene in drug release tests from polymeric matrices, this work aimed to develop an easy and cheap UV spectrophotometric method for the quantification of β-myrcene in aqueous medium. To achieves this goal, samples were prepared in 0.05% (w/v) polysorbate 80 solution, with concentrations of β-myrcene ranging from 0.01% to 0.1% (v/v), and were analyzed at 226 nm. Each sample was analyzed in triplicate and repeated on three different days, to evaluate the repeatability of the results. The results were subjected to Q, F and Student's t-tests. The regression parameters obtained for β-myrcene were above 0.99 and through statistical analysis, it was possible to confirm the repeatability for the results. The values of the limits of detection and quantification indicated that the method is not affected by intrinsic factors of the equipment. The results of accuracy, robustness and selectivity showed recovery rates within acceptable limits. This demonstrates that the quantification of β-myrcene in aqueous medium by UV spectrophotometry is feasible.
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Affiliation(s)
| | - Keila Cardoso Teixeira
- Collegiate of Exact and Biotechnology Sciences, Federal University of Tocantins-UFT, Gurupi, TO 77402-970, Brazil
| | - Laene da Silva Santos
- Collegiate of Exact and Biotechnology Sciences, Federal University of Tocantins-UFT, Gurupi, TO 77402-970, Brazil
| | - Bruna Lima Rocha
- Collegiate of Exact and Biotechnology Sciences, Federal University of Tocantins-UFT, Gurupi, TO 77402-970, Brazil
| | - Carolina Porto Prados
- Collegiate of Exact and Biotechnology Sciences, Federal University of Tocantins-UFT, Gurupi, TO 77402-970, Brazil.
| | | | - Ana Maria da Silva Maia
- Collegiate of Exact and Biotechnology Sciences, Federal University of Tocantins-UFT, Gurupi, TO 77402-970, Brazil.
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Borges JCM, Haddi K, Valbon WR, Costa LTM, Ascêncio SD, Santos GR, Soares IM, Barbosa RS, Viana KF, Silva EAP, Moura WS, Andrade BS, Oliveira EE, Aguiar RWS. Methanolic Extracts of Chiococca alba in Aedes aegypti Biorational Management: Larvicidal and Repellent Potential, and Selectivity against Non-Target Organisms. PLANTS (BASEL, SWITZERLAND) 2022; 11:3298. [PMID: 36501335 PMCID: PMC9735851 DOI: 10.3390/plants11233298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 11/23/2022] [Accepted: 11/25/2022] [Indexed: 06/17/2023]
Abstract
The use of formulations containing botanical products for controlling insects that vector human and animal diseases has increased in recent years. Plant extracts seem to offer fewer risks to the environment and to human health without reducing the application strategy's efficacy when compared to synthetic and conventional insecticides and repellents. Here, we evaluated the potential of extracts obtained from caninana, Chiococca alba (L.) Hitchc. (Rubiaceae), plants as a tool to be integrated into the management of Aedes aegypti, one of the principal vectors for the transmission of arborviruses in humans. We assessed the larvicidal and repellence performance against adult mosquitoes and evaluated the potential undesired effects of the extracts on non-target organisms. We assessed the susceptibility and predatory abilities of the nymphs of Belostoma anurum, a naturally occurring mosquito larva predator, and evaluated the C. alba extract's cytotoxic effects in mammalian cell lines. Our chromatographic analysis revealed 18 compounds, including rutin, naringin, myricetin, morin, and quercetin. The methanolic extracts of C. alba showed larvicidal (LC50 = 82 (72-94) mg/mL) activity without killing or affecting the abilities of B. anurum to prey upon mosquito larvae. Our in silico predictions revealed the molecular interactions between rutin and the AeagOBP1 receptor to be one possible mechanism for the repellent potential recorded for formulations containing C. alba extracts. Low cytotoxicity against mammalian cell lines reinforces the selectivity of C. alba extracts. Collectively, our findings highlight the potential of C. alba and one of its constituents (rutin) as alternative tools to be integrated into the management of A. aegypti mosquitoes.
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Affiliation(s)
- Jaqueline C. M. Borges
- Department of Biotechnology Biodiversity, Graduate School of Biotechnology of Amazônia (Bionorte), Federal University of Tocantins, Gurupi 77413-070, TO, Brazil
| | - Khalid Haddi
- Departmento de Entomologia, Universidade Federal de Lavras (UFLA), Lavras 37200-000, MG, Brazil
- Biotechnology Graduate Program, Federal University of Tocantins, Gurupi 77413-070, TO, Brazil
| | - Wilson R. Valbon
- Departmento de Entomologia, Universidade Federal de Viçosa (UFV), Viçosa 36570-900, MG, Brazil
- Department of Biology, Duke University, Durham, NC 27708, USA
| | - Lara T. M. Costa
- Biotechnology Graduate Program, Federal University of Tocantins, Gurupi 77413-070, TO, Brazil
| | - Sérgio D. Ascêncio
- Biotechnology Graduate Program, Federal University of Tocantins, Gurupi 77413-070, TO, Brazil
| | - Gil R. Santos
- Department of Biotechnology Biodiversity, Graduate School of Biotechnology of Amazônia (Bionorte), Federal University of Tocantins, Gurupi 77413-070, TO, Brazil
- Biotechnology Graduate Program, Federal University of Tocantins, Gurupi 77413-070, TO, Brazil
| | - Ilsamar M. Soares
- Natural Products Research Laboratory, Federal University of Tocantins (UFT), Palmas 77001-090, TO, Brazil
| | - Robson S. Barbosa
- Natural Products Research Laboratory, Federal University of Tocantins (UFT), Palmas 77001-090, TO, Brazil
| | - Kelvinson F. Viana
- Interdisciplinary Center for Life Sciences and Nature, Federal University of Latin American Integration (UNILA), Foz do Iguaçu 85870-901, PR, Brazil
| | - Eder A. P. Silva
- Biotechnology Graduate Program, Federal University of Tocantins, Gurupi 77413-070, TO, Brazil
| | - Wellington S. Moura
- Department of Biotechnology Biodiversity, Graduate School of Biotechnology of Amazônia (Bionorte), Federal University of Tocantins, Gurupi 77413-070, TO, Brazil
| | - Bruno S. Andrade
- Biotechnology Graduate Program, Federal University of Tocantins, Gurupi 77413-070, TO, Brazil
- Department of Biological Sciences, State University of Southwest Bahia, Jequié 45206-190, BA, Brazil
| | - Eugenio E. Oliveira
- Biotechnology Graduate Program, Federal University of Tocantins, Gurupi 77413-070, TO, Brazil
- Departmento de Entomologia, Universidade Federal de Viçosa (UFV), Viçosa 36570-900, MG, Brazil
| | - Raimundo W. S. Aguiar
- Department of Biotechnology Biodiversity, Graduate School of Biotechnology of Amazônia (Bionorte), Federal University of Tocantins, Gurupi 77413-070, TO, Brazil
- Biotechnology Graduate Program, Federal University of Tocantins, Gurupi 77413-070, TO, Brazil
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Cipriano RR, Maia BHLNS, Deschamps C. Chemical variability of essential oils of Eugenia uniflora L. genotypes and their antioxidant activity. AN ACAD BRAS CIENC 2021; 93:e20181299. [PMID: 33909815 DOI: 10.1590/0001-3765202120181299] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 06/27/2019] [Indexed: 11/22/2022] Open
Abstract
Eugenia uniflora, known as the "Brazilian cherry", is an economically important neotropical Myrtaceae in the cosmetics and pharmaceutical industries due the production of essential oils with antioxidant activity. On account of its significant genetic variability, genotype evaluations are needed in order to identify genetic features related to the essential oil production that meet the industry requirements. The main objective of the present study was to evaluate the yield, composition, and antioxidant activity of essential oils isolated from the leaves of 36 genotypes of E. uniflora. Essential oil samples were obtained by hydrodistillation, and their composition was determined by gas chromatography coupled with mass spectrometry. A variation of 0.22% to 1.68% in the essential oil yield was observed, in which 78 compounds, namely oxygenated sesquiterpenes, were identified. According to the cluster analysis of the major compounds, six groups were revealed. The observed diversity demonstrates the genetic variability of the species. Also, the antioxidant activity was affected by the composition of the essential oils, ranging from 176.66 to 867.57 µM TEAC.
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Affiliation(s)
- Roger R Cipriano
- Programa de Pós-Graduação em Agronomia/Produção Vegetal, Universidade Federal do Paraná, Setor de Ciências Agrárias, Departamento de Fitotecnia e Fitossanitarismo, Rua dos Funcionários, 1540, Juvevê, 80035-050 Curitiba, PR, Brazil
| | - Beatriz H L N S Maia
- Programa de Pós-Graduação em Química, Universidade Federal do Paraná, Setor de Ciências Exatas, Departamento de Química, Centro Politécnico, Av. Cel. Francisco H. Santos, 100, Jardim das Américas, 81531-980 Curitiba, PR, Brazil
| | - Cícero Deschamps
- Programa de Pós-Graduação em Agronomia/Produção Vegetal, Universidade Federal do Paraná, Setor de Ciências Agrárias, Departamento de Fitotecnia e Fitossanitarismo, Rua dos Funcionários, 1540, Juvevê, 80035-050 Curitiba, PR, Brazil
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Prolonged mosquitocidal activity of Siparuna guianensis essential oil encapsulated in chitosan nanoparticles. PLoS Negl Trop Dis 2019; 13:e0007624. [PMID: 31398198 PMCID: PMC6703692 DOI: 10.1371/journal.pntd.0007624] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 08/21/2019] [Accepted: 07/10/2019] [Indexed: 01/03/2023] Open
Abstract
Background The use of synthetic insecticides is one of the most common strategies for controlling disease vectors such as mosquitos. However, their overuse can result in serious risks to human health, to the environment, as well as to the selection of insecticidal resistant insect strains. The development of efficient and eco-friendly insect control is urgent, and essential oils have been presented as potential alternatives to synthetic insecticides. Moreover, nanoencapsulation techniques can enhance their efficiency by protecting from degradation and providing a controlled release rate. Results We assessed the potential of chitosan nanoparticles in encapsulating Siparuna guianensis essential oil, and maintaining its efficiency and prolonging its activity for the control of Aedes aegypti larvae. The encapsulation was characterized by scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA), with an encapsulation efficiency ranging from 84.8% to 88.0%. Toxicity studies have demonstrated efficacy against mosquito larvae over 50% for 19 days with 100% mortality during the first week. This persistent action is presumably due to the enhanced contact and slow and maintained release conferred by chitosan nanoparticles. Furthermore, the exposure of aquatic non-target organisms (e.g. embryos and small adult fishes) revealed adequate selectivity of these nanoparticles. Conclusions The encapsulation of S. guianensis essential oil in chitosan nanoparticles showed promising potential as a larvicide control alternative and should be considered within strategies for fighting Ae. aegypti. Numerous outbreaks of infectious diseases such as dengue, zika, and chikungunya in tropical countries have occurred where the mosquito Aedes aegypti is the transmitting vector. In Brazil, these infections are responsible for deaths and severe sequelae. Thus, many efforts have been made by governmental and research groups to control these outbreaks. However, complete success in this control has so far remained unachieved. Parallel to the need to develop new technologies that contribute to the control of insects that transmit diseases, there is a growing societal awareness regarding the risks associated with the use of synthetic insecticides, which has led to a search for natural alternatives such as essential oils from plants. Thus, our group conducted experiments to evaluate the application of nanotechnology in obtaining an efficient prolonged release system to combat Ae. aegypti larvae using the essential oil of a plant native to the Cerrado and Amazonian forests. These results demonstrate that using a simple and easily scalable encapsulation technique; it is possible to keep the low toxicity against non-target organism and prolong the activity of an essential oil in water and maintain larval mortality at a significant level for more than a week with a single application.
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