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Dos Santos LV, Silva ERMND, Caiado MS, Rezende SRDF, de Carvalho MG, Pontes EG. Differential expression of brummer and levels of TAG in different developmental stages Aedes aegypti (Diptera: Culicidae), including fasted adults. Arch Insect Biochem Physiol 2024; 115:e22084. [PMID: 38288494 DOI: 10.1002/arch.22084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 12/19/2023] [Accepted: 01/08/2024] [Indexed: 02/01/2024]
Abstract
Lipid storage in the form of triacylglycerol (TAG) is essential for insect life, as it enables flight, development, and reproduction. The activity of the lipase brummer (bmm) has been shown to be essential to insects' homeostasis. The objective of this study was to evaluate how bmm expression occurs in Aedes aegypti larvae and adults, and to observe TAG levels during fasting in adult females. The bmm sequence was identified in A. aegypti and exhibited a patatin-like phospholipase domain reinforced by the presence of a catalytic dyad with serine and aspartate residues, revealing a high degree of similarity with other organisms. Bmm expression was differentiated in the larvae and adult fat body (FB) following TAG reserve dynamics. Bmm was expressed three times in larval stages L3, L4, and pupae compared with L1 and L2, which could indicate its role in the maturation of these insects. In the postemergence (PE) and post-blood meal (PBM) FB of adult insects, bmm expression varied over several days. PE adults showed a pronounced bmm increase from the third day onward compared with those not subjected to fasting. This was accompanied by a decrease in TAG from the third day onward, suggesting the participation of bmm. Six hours after blood feeding, TAG levels increased in mosquitos reared in the absence of sucrose, suggesting lipid accumulation to guarantee reproduction. Bmm responded positively to fasting, followed by TAG mobilization in adult FB. During the previtellogenic period, bmm levels responded to low TAG levels, unlike the PBM period.
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Affiliation(s)
- Luan Valim Dos Santos
- Departamento de Bioquímica, Universidade Federal Rural do Rio de Janeiro, Seropédica, Rio de Janeiro, Brazil
| | | | - Matheus Silva Caiado
- Departamento de Bioquímica, Universidade Federal Rural do Rio de Janeiro, Seropédica, Rio de Janeiro, Brazil
| | | | - Mario Geraldo de Carvalho
- Departamento de Química Orgânica, Universidade Federal Rural do Rio de Janeiro, Seropédica, Rio de Janeiro, Brazil
| | - Emerson Guedes Pontes
- Departamento de Bioquímica, Universidade Federal Rural do Rio de Janeiro, Seropédica, Rio de Janeiro, Brazil
- Instituto Nacional de Ciência e Tecnologia em Entomologia Molecular, Rio de Janeiro, Brazil
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Dos Santos FR, da Fonseca Rezende SR, Dos Santos LV, da Silva ERMN, Silva Caiado M, Alves de Souza MA, Guedes Pontes E, de Carvalho MG, Braz Filho R, Castro RN. Larvicidal and Fungicidal Activity of the Leaf Essential Oil of Five Myrtaceae Species. Chem Biodivers 2023; 20:e202300823. [PMID: 37917799 DOI: 10.1002/cbdv.202300823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Revised: 10/19/2023] [Accepted: 10/20/2023] [Indexed: 11/04/2023]
Abstract
Myrtaceae is one of the most diverse and abundant botanical families, exhibiting wide diversity in the chemical composition of essential oils (EOs). EOs have various biotechnological applications such as controlling the populations of organisms that negatively impact humans. This study aimed to extract EOs from Myrtaceae species, chemically characterize them, and evaluate their larvicidal and fungicidal effects. EOs were extracted from the leaves of Eugenia brasiliensis, Eugenia uniflora, Psidium cattleyanum, Psidium guajava, and Syzygium cumini by hydrodistillation for 3 h and characterized by chromatographic analysis. Larvaes of Aedes aegypti and colonies of Fusarium oxysporum were subjected to increasing EO concentrations to determine the larvicidal and fungicidal potential. The EOs of Eugenia and Psidium species are primarily composed of sesquiterpenes (>80 %), whereas S. cumini EO is rich in monoterpenes (more than 60 %). The Eugenia species had similar amounts of oxygenated monoterpenes, which may explain their higher larvicidal potential compared to other species, with CL50 of 86.68 and 147.46 PPM, respectively. In addition to these two study species, S. cumini showed a high inhibition of fungal growth, with more than 65 % inhibition. We demonstrated that the actions of five EOs from Myrtaceae with different biological activities are associated with chemical diversity.
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Affiliation(s)
- Frances Regiane Dos Santos
- Departamento de Química Orgânica, Instituto de Química, Universidade Federal Rural do Rio de Janeiro, Rio de Janeiro, Brasil
| | - Sabrina Rita da Fonseca Rezende
- Departamento de Química Orgânica, Instituto de Química, Universidade Federal Rural do Rio de Janeiro, Rio de Janeiro, Brasil
| | - Luan Valim Dos Santos
- Departamento de Bioquímica, Instituto de Química, Universidade Federal Rural do Rio de Janeiro, Rio de Janeiro, Brasil
| | - Elaine R M Nery da Silva
- Departamento de Bioquímica, Instituto de Química, Universidade Federal Rural do Rio de Janeiro, Rio de Janeiro, Brasil
| | - Matheus Silva Caiado
- Departamento de Bioquímica, Instituto de Química, Universidade Federal Rural do Rio de Janeiro, Rio de Janeiro, Brasil
| | - Marco Andre Alves de Souza
- Departamento de Bioquímica, Instituto de Química, Universidade Federal Rural do Rio de Janeiro, Rio de Janeiro, Brasil
| | - Emerson Guedes Pontes
- Departamento de Bioquímica, Instituto de Química, Universidade Federal Rural do Rio de Janeiro, Rio de Janeiro, Brasil
| | - Mario Geraldo de Carvalho
- Departamento de Química Orgânica, Instituto de Química, Universidade Federal Rural do Rio de Janeiro, Rio de Janeiro, Brasil
| | - Raimundo Braz Filho
- Departamento de Química Orgânica, Instituto de Química, Universidade Federal Rural do Rio de Janeiro, Rio de Janeiro, Brasil
| | - Rosane Nora Castro
- Departamento de Química Orgânica, Instituto de Química, Universidade Federal Rural do Rio de Janeiro, Rio de Janeiro, Brasil
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