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Almeida AR, Morais WA, Oliveira ND, Silva WCG, Gomes APB, Espindola LS, Araujo MO, Araujo RM, Albernaz LC, De Sousa DP, Aragão CFS, Ferreira LS. Nanoemulsions and Solid Microparticles Containing Pentyl Cinnamate to Control Aedes aegypti. Int J Mol Sci 2023; 24:12141. [PMID: 37569517 PMCID: PMC10419096 DOI: 10.3390/ijms241512141] [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: 05/19/2023] [Revised: 06/09/2023] [Accepted: 06/20/2023] [Indexed: 08/13/2023] Open
Abstract
The Aedes aegypti mosquito is a vector of severe diseases with high morbidity and mortality rates. The most commonly used industrial larvicides have considerable toxicity for non-target organisms. This study aimed to develop and evaluate liquid and solid carrier systems to use pentyl cinnamate (PC), derived from natural sources, to control Ae. aegypti larvae. The liquid systems consisting of nanoemulsions with different lecithins systems were obtained and evaluated for stability over 30 days. Microparticles (MPs) were obtained by the spray drying of the nanoemulsions using maltodextrin as an adjuvant. Thermal, NMR and FTIR analysis indicated the presence of PC in microparticles. Indeed, the best nanoemulsion system was also the most stable and generated the highest MP yield. The PC larvicidal activity was increased in the PC nanoemulsion system. Therefore, it was possible to develop, characterize and obtain PC carrier systems active against Ae. aegypti larvae.
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Affiliation(s)
- Addison R. Almeida
- Laboratório de Farmacotécnica, Department of Pharmacy, Federal University of Rio Grande do Norte, Natal 59012-570, Brazil; (A.R.A.); (W.A.M.); (N.D.O.); (W.C.G.S.)
- Laboratório de Controle de Qualidade de Medicamentos, Department of Pharmacy, Federal University of Rio Grande do Norte, Natal 59012-570, Brazil; (A.P.B.G.); (C.F.S.A.)
| | - Waldenice A. Morais
- Laboratório de Farmacotécnica, Department of Pharmacy, Federal University of Rio Grande do Norte, Natal 59012-570, Brazil; (A.R.A.); (W.A.M.); (N.D.O.); (W.C.G.S.)
| | - Nicolas D. Oliveira
- Laboratório de Farmacotécnica, Department of Pharmacy, Federal University of Rio Grande do Norte, Natal 59012-570, Brazil; (A.R.A.); (W.A.M.); (N.D.O.); (W.C.G.S.)
- Laboratório de Controle de Qualidade de Medicamentos, Department of Pharmacy, Federal University of Rio Grande do Norte, Natal 59012-570, Brazil; (A.P.B.G.); (C.F.S.A.)
| | - Wilken C. G. Silva
- Laboratório de Farmacotécnica, Department of Pharmacy, Federal University of Rio Grande do Norte, Natal 59012-570, Brazil; (A.R.A.); (W.A.M.); (N.D.O.); (W.C.G.S.)
| | - Ana P. B. Gomes
- Laboratório de Controle de Qualidade de Medicamentos, Department of Pharmacy, Federal University of Rio Grande do Norte, Natal 59012-570, Brazil; (A.P.B.G.); (C.F.S.A.)
| | - Laila S. Espindola
- Laboratory of Phamacognosy, Brasília University, Campus Universitário Darcy Ribeiro, Brasília 70910-900, Brazil; (L.S.E.); (L.C.A.)
| | - Marianna O. Araujo
- Laboratory of Pharmaceutical Chemistry, Federal University of Paraíba, João Pessoa 58050-085, Brazil; (M.O.A.); (D.P.D.S.)
| | - Renata M. Araujo
- Chemistry Institute, Federal University of Rio Grande do Norte, Natal 59072-970, Brazil;
| | - Lorena C. Albernaz
- Laboratory of Phamacognosy, Brasília University, Campus Universitário Darcy Ribeiro, Brasília 70910-900, Brazil; (L.S.E.); (L.C.A.)
| | - Damião P. De Sousa
- Laboratory of Pharmaceutical Chemistry, Federal University of Paraíba, João Pessoa 58050-085, Brazil; (M.O.A.); (D.P.D.S.)
| | - Cicero F. S. Aragão
- Laboratório de Controle de Qualidade de Medicamentos, Department of Pharmacy, Federal University of Rio Grande do Norte, Natal 59012-570, Brazil; (A.P.B.G.); (C.F.S.A.)
| | - Leandro S. Ferreira
- Laboratório de Controle de Qualidade de Medicamentos, Department of Pharmacy, Federal University of Rio Grande do Norte, Natal 59012-570, Brazil; (A.P.B.G.); (C.F.S.A.)
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Vidal-Albalat A, Kindahl T, Rajeshwari R, Lindgren C, Forsgren N, Kitur S, Tengo LS, Ekström F, Kamau L, Linusson A. Structure-Activity Relationships Reveal Beneficial Selectivity Profiles of Inhibitors Targeting Acetylcholinesterase of Disease-Transmitting Mosquitoes. J Med Chem 2023; 66:6333-6353. [PMID: 37094110 PMCID: PMC10184127 DOI: 10.1021/acs.jmedchem.3c00234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2023]
Abstract
Insecticide resistance jeopardizes the prevention of infectious diseases such as malaria and dengue fever by vector control of disease-transmitting mosquitoes. Effective new insecticidal compounds with minimal adverse effects on humans and the environment are therefore urgently needed. Here, we explore noncovalent inhibitors of the well-validated insecticidal target acetylcholinesterase (AChE) based on a 4-thiazolidinone scaffold. The 4-thiazolidinones inhibit AChE1 from the mosquitoes Anopheles gambiae and Aedes aegypti at low micromolar concentrations. Their selectivity depends primarily on the substitution pattern of the phenyl ring; halogen substituents have complex effects. The compounds also feature a pendant aliphatic amine that was important for activity; little variation of this group is tolerated. Molecular docking studies suggested that the tight selectivity profiles of these compounds are due to competition between two binding sites. Three 4-thiazolidinones tested for in vivo insecticidal activity had similar effects on disease-transmitting mosquitoes despite a 10-fold difference in their in vitro activity.
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Affiliation(s)
| | - Tomas Kindahl
- Department of Chemistry, Umeå University, SE-90187 Umeå, Sweden
| | | | | | - Nina Forsgren
- CBRN Defence and Security, Swedish Defence Research Agency, SE-90621 Umeå, Sweden
| | - Stanley Kitur
- Centre for Biotechnology Research and Development, Kenya Medical Research Institute, PO Box 54840-00200 Nairobi, Kenya
| | - Laura Sela Tengo
- Centre for Biotechnology Research and Development, Kenya Medical Research Institute, PO Box 54840-00200 Nairobi, Kenya
| | - Fredrik Ekström
- CBRN Defence and Security, Swedish Defence Research Agency, SE-90621 Umeå, Sweden
| | - Luna Kamau
- Centre for Biotechnology Research and Development, Kenya Medical Research Institute, PO Box 54840-00200 Nairobi, Kenya
| | - Anna Linusson
- Department of Chemistry, Umeå University, SE-90187 Umeå, Sweden
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Larvicidal activity of plant extracts from Colombian North Coast against Aedes aegypti L. mosquito larvae. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Makri A, Papachristos DP, Michaelakis A, Vidali VP. Colupulone, colupone and novel deoxycohumulone geranyl analogues as larvicidal agents against Culex pipiens. PEST MANAGEMENT SCIENCE 2022; 78:4217-4222. [PMID: 35705833 DOI: 10.1002/ps.7039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 06/10/2022] [Accepted: 06/15/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND As climate change proceeds, the management of the population of mosquitoes becomes more and more challenging. Insect adulticides and larvicides constitute significant control techniques, with the latter being considered the leading mosquito control method. However, the development of mosquito resistance development and the adverse side effects caused by the extensive use of synthetic insecticides have turned research towards the discovery of environmentally-friendly solutions. Plants and bacteria have historically proven to be a good source of insecticidally active compounds, which may possess novel modes of action to overcome current resistance mechanisms and could also possess favorable human and environmental safety profiles. A previous study demonstrated that the naturally occurring prenylated acyl phloroglucinol deoxycohumulone is a potent larvicidal agent against Culex pipiens. Herein the structural characteristics that improve it are explored by evaluating colupulone and novel geranylated analogues. RESULTS Colupulone, a prenylated acyl phloroglucinol isolated from Humulus lupulus, colupone, and novel geranylated acyl phloroglucinol congeners, were synthesized and evaluated against Cx. pipiens larva. Results indicated that selected derivatives exhibited superior potency than deoxycohumulone (LC50 43.7 mg L-1 ). Thus, strong activity was observed for colupulone (LC50 19.7 mg L-1 ), and some novel geranyl analogues of deoxycohumulone reaching at LC50 17.1 mg L-1 , while colupone and similar compounds were almost inactive. CONCLUSION The results determined the relationship between the target activity and the chemical structure of the tested compounds, and they revealed significantly improved larvicidal candidates. These results highlight the potential of the acyl phloroglucinol chemistry for further development of mosquito larvicides. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Apostolia Makri
- Natural Products and Bioorganic Chemistry Laboratory, Institute of Nanoscience & Nanotechnology, NCSR "Demokritos", Athens, Greece
- Department of Food Science and Human Nutrition, Agricultural University of Athens, Athens, Greece
| | - Dimitrios P Papachristos
- Scientific Directorate of Entomology and Agricultural Zoology, Benaki Phytopathological Institute, Kifissia, Greece
| | - Antonios Michaelakis
- Scientific Directorate of Entomology and Agricultural Zoology, Benaki Phytopathological Institute, Kifissia, Greece
| | - Veroniki P Vidali
- Natural Products and Bioorganic Chemistry Laboratory, Institute of Nanoscience & Nanotechnology, NCSR "Demokritos", Athens, Greece
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