1
|
Matiadis D, Liggri PGV, Kritsi E, Tzioumaki N, Zoumpoulakis P, Papachristos DP, Balatsos G, Sagnou M, Michaelakis A. Curcumin Derivatives as Potential Mosquito Larvicidal Agents against Two Mosquito Vectors, Culex pipiens and Aedes albopictus. Int J Mol Sci 2021; 22:8915. [PMID: 34445622 PMCID: PMC8396198 DOI: 10.3390/ijms22168915] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 07/18/2021] [Accepted: 08/13/2021] [Indexed: 01/06/2023] Open
Abstract
Vector-borne diseases have appeared or re-emerged in many Southern Europe countries making the transmission of infectious diseases by mosquitoes (vectors) one of the greatest worldwide health threats. Larvicides have been used extensively for the control of Aedes (Stegomyia) albopictus (Skuse, 1895) (Diptera: Culicidae) and Culex pipiens Linnaeus, 1758 (Diptera: Culicidae) mosquitoes in urban and semi-urban environments, causing the increasing resistance of mosquitoes to commercial insecticides. In this study, 27 curcuminoids and monocarbonyl curcumin derivatives were synthesised and evaluated as potential larvicidal agents against Cx. pipiens and Ae. albopictus. Most of the compounds were more effective against larvae of both mosquito species. Four of the tested compounds, curcumin, demethoxycurcumin, curcumin-BF2 complex and a monocarbonyl tetramethoxy curcumin derivative exhibited high activity against both species. In Cx. pipiens the recorded LC50 values were 6.0, 9.4, 5.0 and 32.5 ppm, respectively, whereas in Ae. albopictus they exhibited LC50 values of 9.2, 36.0, 5.5 and 23.6 ppm, respectively. No conclusive structure activity relationship was evident from the results and the variety of descriptors values generated in silico provided some insight to this end.
Collapse
Affiliation(s)
- Dimitris Matiadis
- Institute of Biosciences and Applications, National Centre for Scientific Research “Demokritos”, 15310 Athens, Greece;
| | - Panagiota G. V. Liggri
- Department of Biochemistry and Biotechnology, University of Thessaly, Biopolis, 41500 Larissa, Greece; (P.G.V.L.); (N.T.)
- Benaki Phytopathological Institute, Scientific Directorate of Entomology and Agricultural Zoology, 14561 Kifissia, Greece; (D.P.P.); (G.B.)
| | - Eftichia Kritsi
- Institute of Chemical Biology, National Hellenic Research Foundation, 48 Vas. Constantinou Avenue, 11635 Athens, Greece; (E.K.); (P.Z.)
- Department of Food Science and Technology, University of West Attica, Ag. Spyridonos, 12243 Egaleo, Greece
| | - Niki Tzioumaki
- Department of Biochemistry and Biotechnology, University of Thessaly, Biopolis, 41500 Larissa, Greece; (P.G.V.L.); (N.T.)
- Benaki Phytopathological Institute, Scientific Directorate of Entomology and Agricultural Zoology, 14561 Kifissia, Greece; (D.P.P.); (G.B.)
| | - Panagiotis Zoumpoulakis
- Institute of Chemical Biology, National Hellenic Research Foundation, 48 Vas. Constantinou Avenue, 11635 Athens, Greece; (E.K.); (P.Z.)
- Department of Food Science and Technology, University of West Attica, Ag. Spyridonos, 12243 Egaleo, Greece
| | - Dimitrios P. Papachristos
- Benaki Phytopathological Institute, Scientific Directorate of Entomology and Agricultural Zoology, 14561 Kifissia, Greece; (D.P.P.); (G.B.)
| | - George Balatsos
- Benaki Phytopathological Institute, Scientific Directorate of Entomology and Agricultural Zoology, 14561 Kifissia, Greece; (D.P.P.); (G.B.)
| | - Marina Sagnou
- Institute of Biosciences and Applications, National Centre for Scientific Research “Demokritos”, 15310 Athens, Greece;
| | - Antonios Michaelakis
- Benaki Phytopathological Institute, Scientific Directorate of Entomology and Agricultural Zoology, 14561 Kifissia, Greece; (D.P.P.); (G.B.)
| |
Collapse
|
2
|
França LP, Amaral ACF, Ramos ADS, Ferreira JLP, Maria ACB, Oliveira KMT, Araujo ES, Branches ADS, Silva JN, Silva NG, Barros GDA, Chaves FCM, Tadei WP, Silva JRDA. Piper capitarianum essential oil: a promising insecticidal agent for the management of Aedes aegypti and Aedes albopictus. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:9760-9776. [PMID: 33159226 DOI: 10.1007/s11356-020-11148-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 10/05/2020] [Indexed: 06/11/2023]
Abstract
Mosquitoes are responsible for serious public health problems worldwide, and as such, Aedes aegypti and Aedes albopictus are important vectors in the transmission of dengue, chikungunya, and Zika in Brazil and other countries of the world. Due to growing resistance to chemical insecticides among populations of vectors, environmentally friendly strategies for vector management are receiving ever more attention. Essential oils (EOs) extracted from plants have activities against insects with multiple mechanisms of action. These mechanisms hinder the development of resistance, and have the advantages of being less toxicity and biodegradable. Thus, the present study aimed to evaluate the chemical composition of the EOs obtained from Piper capitarianum Yunck, as well as evaluating their insecticidal potential against Aedes aegypti and A. albopictus, and their toxicity in relation to Artemia salina. The yields of the EOs extracted from the leaves, stems, and inflorescences of P. capitarianum were 1.2%, 0.9%, and 0.6%, respectively, and their main constituents were trans-caryophyllene (20.0%), α-humulene (10.2%), β-myrcene (10.5%), α-selinene (7.2%), and linalool (6.0%). The EO from the inflorescences was the most active against A. aegypti and A. albopictus, and exhibited the respective larvicidal (LC50 = 87.6 μg/mL and 76.1 μg/mL) and adulticide activities (LC50 = 126.2 μg/mL and 124.5 μg/mL). This EO was also the most active in the inhibition of AChE, since it presented an IC50 value of 14.2 μg/mL. Its larvicidal effect was observed under optical and scanning electron microscopy. Additionally, non-toxic effects against A. salina were observed. Docking modeling of trans-caryophyllene and α-humulene on sterol carrier protein-2 (SCP-2) suggests that both molecules have affinity with the active site of the enzyme, which indicates a possible mechanism of action. Therefore, the essential oil of P. capitarianum may be used in the development of new insecticide targets for the control of A. aegypti and A. albopictus in the Amazonian environment.
Collapse
Affiliation(s)
- Leandro P França
- Chromatography Laboratory, Chemistry Department, Federal University of Amazonas, Manaus, AM, Brazil
| | - Ana Claudia F Amaral
- Laboratory of Medicinal Plants and Derivatives, Department of Chemistry of Natural Products, Farmanguinhos, Oswaldo Cruz Foundation, Rio de Janeiro, RJ, Brazil
| | - Aline de S Ramos
- Laboratory of Medicinal Plants and Derivatives, Department of Chemistry of Natural Products, Farmanguinhos, Oswaldo Cruz Foundation, Rio de Janeiro, RJ, Brazil
| | - José Luiz P Ferreira
- Laboratory of Medicinal Plants and Derivatives, Department of Chemistry of Natural Products, Farmanguinhos, Oswaldo Cruz Foundation, Rio de Janeiro, RJ, Brazil
| | - Ana Clara B Maria
- Laboratory of Medicinal Plants and Derivatives, Department of Chemistry of Natural Products, Farmanguinhos, Oswaldo Cruz Foundation, Rio de Janeiro, RJ, Brazil
| | - Kelson Mota T Oliveira
- Laboratory of Theoretical and Computational Chemistry, Chemistry Department, Federal University of Amazonas, Manaus, AM, Brazil
| | - Earle S Araujo
- Laboratory of Theoretical and Computational Chemistry, Chemistry Department, Federal University of Amazonas, Manaus, AM, Brazil
| | - Adjane Dalvana S Branches
- Laboratory of Theoretical and Computational Chemistry, Chemistry Department, Federal University of Amazonas, Manaus, AM, Brazil
| | - Jonathas N Silva
- Laboratory of Theoretical and Computational Chemistry, Chemistry Department, Federal University of Amazonas, Manaus, AM, Brazil
| | - Noam G Silva
- Laboratory of Theoretical and Computational Chemistry, Chemistry Department, Federal University of Amazonas, Manaus, AM, Brazil
| | - Gabriel de A Barros
- Laboratory of Theoretical and Computational Chemistry, Chemistry Department, Federal University of Amazonas, Manaus, AM, Brazil
| | | | - Wanderli P Tadei
- Laboratory of Malaria and Dengue, Institute for Research in the Amazon, Manaus, AM, Brazil
| | | |
Collapse
|
3
|
Paul A, Raj VS, Vibhuti A, Pandey R. Larvicidal efficacy of Andrographis paniculata and Tinospora cordifolia against aedes aegypti: A dengue vector. Pharmacognosy Res 2020. [DOI: 10.4103/pr.pr_35_20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
|
4
|
Sterol Carrier Protein Inhibition-Based Control of Mosquito Vectors: Current Knowledge and Future Perspectives. CANADIAN JOURNAL OF INFECTIOUS DISEASES & MEDICAL MICROBIOLOGY 2019; 2019:7240356. [PMID: 31379982 PMCID: PMC6652082 DOI: 10.1155/2019/7240356] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Accepted: 06/16/2019] [Indexed: 12/27/2022]
Abstract
Cholesterol is one of the most vital compounds for animals as it is involved in various biological processes and acts as the structural material in the body. However, insects do not have some of the essential enzymes in the cholesterol biosynthesis pathway and this makes them dependent on dietary cholesterol. Thus, the blocking of cholesterol uptake may have detrimental effects on the survival of the insect. Utilizing this character, certain phytochemicals can be used to inhibit mosquito sterol carrier protein-2 (AeSCP-2) activity via competitive binding and proven to have effective insecticidal activities against disease-transmitting mosquitoes and other insect vectors. A range of synthetic compounds, phytochemicals, and synthetic analogs of phytochemicals are found to have AeSCP-2 inhibitory activity. Phytochemicals such as alpha-mangostin can be considered as the most promising group of compounds when considering the minimum environmental impact and availability at a low cost. Once the few limitations such as very low persistence in the environment are addressed successfully, these chemicals may be used as an effective tool for controlling mosquitoes and other disease-transmitting vector populations.
Collapse
|
5
|
Andrade-Ochoa S, Correa-Basurto J, Rodríguez-Valdez LM, Sánchez-Torres LE, Nogueda-Torres B, Nevárez-Moorillón GV. In vitro and in silico studies of terpenes, terpenoids and related compounds with larvicidal and pupaecidal activity against Culex quinquefasciatus Say (Diptera: Culicidae). Chem Cent J 2018; 12:53. [PMID: 29748726 PMCID: PMC5945571 DOI: 10.1186/s13065-018-0425-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Accepted: 04/30/2018] [Indexed: 11/10/2022] Open
Abstract
Background In order to develop new larvicidal agents derived from phytochemicals, the larvicidal activity of fifty molecules that are constituent of essential oils was evaluated against Culex quinquefasciatus Say. Terpenes, terpenoids and phenylpropanoids molecules were included in the in vitro evaluation, and QSAR models using genetic algorithms were built to identify molecular and structural properties of biological interest. Further, to obtain structural details on the possible mechanism of action, selected compounds were submitted to docking studies on sterol carrier protein-2 (SCP-2) as possible target. Results Results showed high larvicidal activity of carvacrol and thymol on the third and fourth larval stage with a median lethal concentration (LC50) of 5.5 and 11.1 µg/mL respectively. Myrcene and carvacrol were highly toxic for pupae, with LC50 values of 31.8 and 53.2 µg/mL. Structure–activity models showed that the structural property π-bonds is the largest contributor of larvicidal activity while ketone groups should be avoided. Similarly, property–activity models attributed to the molecular descriptor LogP the most contribution to larvicidal activity, followed by the absolute total charge (Qtot) and molar refractivity (AMR). The models were statistically significant; thus the information contributes to the design of new larvicidal agents. Docking studies show that all molecules tested have the ability to interact with the SCP-2 protein, wherein α-humulene and β-caryophyllene were the compounds with higher binding energy. Conclusions The description of the molecular properties and the structural characteristics responsible for larvicidal activity of the tested compounds were used for the development of mathematical models of structure–activity relationship. The identification of molecular and structural descriptors, as well as studies of molecular docking on the SCP-2 protein, provide insight on the mechanism of action of the active molecules, and the information can be used for the design of new structures for synthesis as potential new larvicidal agents. Electronic supplementary material The online version of this article (10.1186/s13065-018-0425-2) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- S Andrade-Ochoa
- Facultad de Ciencias Químicas, Universidad Autónoma de Chihuahua, Circuito Universitario S/N, Campus Universitario II., Chihuahua, Chihuahua, Mexico.,Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala S/N. Col. Santo Tomas, 11340, México, DF, Mexico
| | - J Correa-Basurto
- Escuela Superior de Medicina, Instituto Politécnico Nacional, Plan de San Luis y Díaz Mirón s/n, Col. Casco de Santo Tomas, Delegación Miguel Hidalgo, C.P. 11340, México, DF, Mexico
| | - L M Rodríguez-Valdez
- Facultad de Ciencias Químicas, Universidad Autónoma de Chihuahua, Circuito Universitario S/N, Campus Universitario II., Chihuahua, Chihuahua, Mexico
| | - L E Sánchez-Torres
- Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala S/N. Col. Santo Tomas, 11340, México, DF, Mexico
| | - B Nogueda-Torres
- Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala S/N. Col. Santo Tomas, 11340, México, DF, Mexico
| | - G V Nevárez-Moorillón
- Facultad de Ciencias Químicas, Universidad Autónoma de Chihuahua, Circuito Universitario S/N, Campus Universitario II., Chihuahua, Chihuahua, Mexico.
| |
Collapse
|
6
|
Singarapu KK, Ahuja A, Potula PR, Ummanni R. Solution Nuclear Magnetic Resonance Studies of Sterol Carrier Protein 2 Like 2 (SCP2L2) Reveal the Insecticide Specific Structural Characteristics of SCP2 Proteins in Aedes aegypti Mosquitoes. Biochemistry 2016; 55:4919-27. [DOI: 10.1021/acs.biochem.6b00322] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Kiran Kumar Singarapu
- Center for NMR and Structural Chemistry and §Center for Chemical
Biology, CSIR-Indian Institute of Chemical Technology, Uppal Road, Tarnaka, Hyderabad 500007, India
| | - Ashish Ahuja
- Center for NMR and Structural Chemistry and §Center for Chemical
Biology, CSIR-Indian Institute of Chemical Technology, Uppal Road, Tarnaka, Hyderabad 500007, India
| | - Purushotam Reddy Potula
- Center for NMR and Structural Chemistry and §Center for Chemical
Biology, CSIR-Indian Institute of Chemical Technology, Uppal Road, Tarnaka, Hyderabad 500007, India
| | - Ramesh Ummanni
- Center for NMR and Structural Chemistry and §Center for Chemical
Biology, CSIR-Indian Institute of Chemical Technology, Uppal Road, Tarnaka, Hyderabad 500007, India
| |
Collapse
|
7
|
da Silva JBP, Navarro DMDAF, da Silva AG, Santos GKN, Dutra KA, Moreira DR, Ramos MN, Espíndola JWP, de Oliveira ADT, Brondani DJ, Leite ACL, Hernandes MZ, Pereira VRA, da Rocha LF, de Castro MCAB, de Oliveira BC, Lan Q, Merz KM. Thiosemicarbazones as Aedes aegypti larvicidal. Eur J Med Chem 2015; 100:162-75. [PMID: 26087027 DOI: 10.1016/j.ejmech.2015.04.061] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Revised: 04/28/2015] [Accepted: 04/29/2015] [Indexed: 01/21/2023]
Abstract
A set of aryl- and phenoxymethyl-(thio)semicarbazones were synthetized, characterized and biologically evaluated against the larvae of Aedes aegypti (A. aegypti), the vector responsible for diseases like Dengue and Yellow Fever. (Q)SAR studies were useful for predicting the activities of the compounds not included to create the QSAR model as well as to predict the features of a new compound with improved activity. Docking studies corroborated experimental evidence of AeSCP-2 as a potential target able to explain the larvicidal properties of its compounds. The trend observed between the in silico Docking scores and the in vitro pLC50 (equals -log LC50, at molar concentration) data indicated that the highest larvicidal compounds, or the compounds with the highest values for pLC50, are usually those with the higher docking scores (i.e., greater in silico affinity for the AeSCP-2 target). Determination of cytotoxicity for these compounds in mammal cells demonstrated that the top larvicide compounds are non-toxic.
Collapse
Affiliation(s)
- João Bosco P da Silva
- Departamento de Química Fundamental, Centro de Ciências Exatas e da Natureza, Universidade Federal de Pernambuco, 50670-901, Recife, PE, Brazil.
| | - Daniela Maria do A F Navarro
- Departamento de Química Fundamental, Centro de Ciências Exatas e da Natureza, Universidade Federal de Pernambuco, 50670-901, Recife, PE, Brazil.
| | - Aluizio G da Silva
- Departamento de Química Fundamental, Centro de Ciências Exatas e da Natureza, Universidade Federal de Pernambuco, 50670-901, Recife, PE, Brazil
| | - Geanne K N Santos
- Departamento de Química Fundamental, Centro de Ciências Exatas e da Natureza, Universidade Federal de Pernambuco, 50670-901, Recife, PE, Brazil
| | - Kamilla A Dutra
- Departamento de Química Fundamental, Centro de Ciências Exatas e da Natureza, Universidade Federal de Pernambuco, 50670-901, Recife, PE, Brazil
| | - Diogo Rodrigo Moreira
- Departamento de Química Fundamental, Centro de Ciências Exatas e da Natureza, Universidade Federal de Pernambuco, 50670-901, Recife, PE, Brazil
| | - Mozart N Ramos
- Departamento de Química Fundamental, Centro de Ciências Exatas e da Natureza, Universidade Federal de Pernambuco, 50670-901, Recife, PE, Brazil
| | - José Wanderlan P Espíndola
- Departamento de Ciências Farmacêuticas, Centro de Ciências da Saúde, Universidade Federal de Pernambuco, 50740-521, Recife, PE, Brazil
| | - Ana Daura T de Oliveira
- Departamento de Ciências Farmacêuticas, Centro de Ciências da Saúde, Universidade Federal de Pernambuco, 50740-521, Recife, PE, Brazil
| | - Dalci José Brondani
- Departamento de Ciências Farmacêuticas, Centro de Ciências da Saúde, Universidade Federal de Pernambuco, 50740-521, Recife, PE, Brazil
| | - Ana Cristina L Leite
- Departamento de Ciências Farmacêuticas, Centro de Ciências da Saúde, Universidade Federal de Pernambuco, 50740-521, Recife, PE, Brazil
| | - Marcelo Zaldini Hernandes
- Departamento de Ciências Farmacêuticas, Centro de Ciências da Saúde, Universidade Federal de Pernambuco, 50740-521, Recife, PE, Brazil
| | - Valéria R A Pereira
- Departamento de Imunologia, Centro de Pesquisas Aggeu Magalhães, Fundação Oswaldo Cruz, 50670-420, Recife, PE, Brazil
| | - Lucas F da Rocha
- Departamento de Imunologia, Centro de Pesquisas Aggeu Magalhães, Fundação Oswaldo Cruz, 50670-420, Recife, PE, Brazil
| | - Maria Carolina A B de Castro
- Departamento de Imunologia, Centro de Pesquisas Aggeu Magalhães, Fundação Oswaldo Cruz, 50670-420, Recife, PE, Brazil
| | - Beatriz C de Oliveira
- Departamento de Imunologia, Centro de Pesquisas Aggeu Magalhães, Fundação Oswaldo Cruz, 50670-420, Recife, PE, Brazil
| | - Que Lan
- Department of Entomology, University of Wisconsin-Madison, 1630 Linden Drive, Madison, WI 53706, USA
| | - Kenneth M Merz
- Quantum Theory Project, University of Florida, 2234 New Physics Building, Gainesville, PO Box 118435, Florida, USA
| |
Collapse
|
8
|
Du X, Ma H, Zhang X, Liu K, Peng J, Lan Q, Hong H. Characterization of the sterol carrier protein-x/sterol carrier protein-2 gene in the cotton bollworm, Helicoverpa armigera. JOURNAL OF INSECT PHYSIOLOGY 2012; 58:1413-1423. [PMID: 22922458 DOI: 10.1016/j.jinsphys.2012.08.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2012] [Revised: 08/10/2012] [Accepted: 08/13/2012] [Indexed: 06/01/2023]
Abstract
Cholesterol is a membrane component and the precursor of ecdysteroids in insects, but insects cannot synthesize cholesterol de novo. Therefore, cholesterol uptake and transportation during the feeding larval stages are critical processes in insects. The sterol carrier protein-2 domain (SCP-2) in sterol carrier proteins-x (SCP-x) has been speculated to be involved in intracellular cholesterol transfer and metabolism in vertebrates. However, a direct association between SCP-x gene expression, cholesterol absorption and development in lepidopteran insects is poorly understood. We identified the Helicoverpa armigera sterol carrier protein-x/2 (HaSCP-x/2) gene from the larval midgut cDNAs. The HaSCP-x/2 gene is well conserved during evolution and relatively divergent in heterogenetic species. Transcripts of HaSCP-x/2 were detected by qRT-PCR at the highest level in the midgut of H. armigera during the larval stages. Expression knockdown of HaSCP-x/2 transcripts via dsRNA interference resulted in delayed larval development and decreased adult fecundity. Sterol carrier protein-2 inhibitors were lethal to young larvae and decreased fertility in adults emerged from treated elder larvae in H. armigera. The results taken together suggest that HaSCPx/2 gene is important for normal development and fertility in H. armigera.
Collapse
Affiliation(s)
- Xin Du
- College of Life Sciences, Central China Normal University, 100 Luoyu Road, Wuhan, Hubei 430079, PR China
| | | | | | | | | | | | | |
Collapse
|
9
|
ANSTROM DAVIDM, ZHOU XIA, KALK CODYN, SONG BAOAN, LAN QUE. Mosquitocidal properties of natural product compounds isolated from Chinese herbs and synthetic analogs of curcumin. JOURNAL OF MEDICAL ENTOMOLOGY 2012; 49:350-355. [PMID: 22493854 PMCID: PMC3538819 DOI: 10.1603/me11117] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Because of resistance to current insecticides and to environmental, health, and regulatory concerns, naturally occurring compounds and their derivatives are of increasing interest for the development of new insecticidal compounds against vectors of disease-causing pathogens. Fifty-eight compounds, either extracted and purified from plants native to China or synthetic analogs of curcumin, were evaluated for both their larvicidal activity against Aedes aegypti (L.) and their ability to inhibit binding of cholesterol to Ae. aegypti sterol carrier protein-2 in vitro. Of the compounds tested, curcumin analogs seem especially promising in that of 24 compounds tested five were inhibitors of Ae. aegypti sterol carrier protein-2 with EC50 values ranging from 0.65 to 62.87 microM, and three curcumin analogs exhibited larvicidal activity against fourth instar Ae. aegypti larvae with LC50 values ranging from 17.29 to 27.90 microM. Adding to the attractiveness of synthetic curcumin analogs is the relative ease of synthesizing a large diversity of compounds; only a small fraction of such diversity has been sampled in this study.
Collapse
Affiliation(s)
- DAVID M. ANSTROM
- Department of Entomology, University of Wisconsin, 840 Russell Labs, 1630 Linden Drive, Madison, WI 53706
| | - XIA ZHOU
- Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for Research and Development of Fine Chemicals, Guizhou University, Guiyang 550025, People’s Republic of China
| | - CODY N. KALK
- Department of Entomology, University of Wisconsin, 840 Russell Labs, 1630 Linden Drive, Madison, WI 53706
| | - BAOAN SONG
- Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for Research and Development of Fine Chemicals, Guizhou University, Guiyang 550025, People’s Republic of China
| | - QUE LAN
- Department of Entomology, University of Wisconsin, 840 Russell Labs, 1630 Linden Drive, Madison, WI 53706
| |
Collapse
|
10
|
Peng R, Maklokova VI, Chandrashekhar JH, Lan Q. In vivo functional genomic studies of sterol carrier protein-2 gene in the yellow fever mosquito. PLoS One 2011; 6:e18030. [PMID: 21437205 PMCID: PMC3060925 DOI: 10.1371/journal.pone.0018030] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2010] [Accepted: 02/18/2011] [Indexed: 11/19/2022] Open
Abstract
A simple and efficient DNA delivery method to introduce extrachromosomal DNA into mosquito embryos would significantly aid functional genomic studies. The conventional method for delivery of DNA into insects is to inject the DNA directly into the embryos. Taking advantage of the unique aspects of mosquito reproductive physiology during vitellogenesis and an in vivo transfection reagent that mediates DNA uptake in cells via endocytosis, we have developed a new method to introduce DNA into mosquito embryos vertically via microinjection of DNA vectors in vitellogenic females without directly manipulating the embryos. Our method was able to introduce inducible gene expression vectors transiently into F0 mosquitoes to perform functional studies in vivo without transgenic lines. The high efficiency of expression knockdown was reproducible with more than 70% of the F0 individuals showed sufficient gene expression suppression (<30% of the controls' levels). At the cohort level, AeSCP-2 expression knockdown in early instar larvae resulted in detectable phenotypes of the expression deficiency such as high mortality, lowered fertility, and distorted sex ratio after induction of AeSCP-2 siRNA expression in vivo. The results further confirmed the important role of AeSCP-2 in the development and reproduction of A. aegypti. In this study, we proved that extrachromosomal transient expression of an inducible gene from a DNA vector vertically delivered via vitellogenic females can be used to manipulate gene expression in F0 generation. This new method will be a simple and efficient tool for in vivo functional genomic studies in mosquitoes.
Collapse
Affiliation(s)
- Rong Peng
- College of Life Sciences, Central China Normal University, Wuhan, Hubei, China
- Department of Entomology, University of Wisconsin, Madison, Wisconsin, United States of America
| | - Vilena I. Maklokova
- Division of Pharmaceutical Sciences, School of Pharmacy, University of Wisconsin, Madison, Wisconsin, United States of America
| | | | - Que Lan
- Department of Entomology, University of Wisconsin, Madison, Wisconsin, United States of America
- * E-mail:
| |
Collapse
|
11
|
Radek JT, Dyer DH, Lan Q. Effects of mutations in Aedes aegypti sterol carrier protein-2 on the biological function of the protein. Biochemistry 2010; 49:7532-41. [PMID: 20681612 DOI: 10.1021/bi902026v] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Sterol carrier protein-2 (SCP-2) is a nonspecific intracellular lipid carrier protein. However, the molecular mechanism of ligand selectivity and the in vivo function of SCP-2 remain unclear. In this study, we used site-directed mutagenesis to investigate the ligand selectivity and in vivo function of the yellow fever mosquito sterol carrier protein-2 protein (AeSCP-2). Mutations to amino acids in AeSCP-2 known to interact with bound ligand also weakened NBD-cholesterol binding. Substitution of amino acids in the ligand cavity changed the ligand specificity of mutant AeSCP-2. Overexpressing wild-type AeSCP-2 in the Aedes aegypti cultured Aag-2 cells resulted in an increase in the level of incorporation of [(3)H]cholesterol. However, overexpressing mutants that were deleterious to the binding of NBD-cholesterol in AeSCP-2 showed a loss of ability to enhance uptake of [(3)H]cholesterol in cultured cells. Interestingly, when [(3)H]palmitic acid was used as the substrate for incorporation in vivo, there was no change in the levels of incorporation with overexpression of wild-type protein or mutated AeSCP-2s. The in vivo data suggest that AeSCP-2 is involved in sterol uptake, but not fatty acid uptake. This is the first report that the cholesterol binding ability may directly correlate with AeSCP-2's in vivo function in aiding the uptake of cholesterol.
Collapse
Affiliation(s)
- James T Radek
- Department of Entomology, University of Wisconsin, Madison, Wisconsin 53706, USA
| | | | | |
Collapse
|
12
|
Kriska T, Pilat A, Schmitt JC, Girotti AW. Sterol carrier protein-2 (SCP-2) involvement in cholesterol hydroperoxide cytotoxicity as revealed by SCP-2 inhibitor effects. J Lipid Res 2010; 51:3174-84. [PMID: 20656919 DOI: 10.1194/jlr.m008342] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Sterol carrier protein-2 (SCP-2) plays an important role in cholesterol trafficking and metabolism in mammalian cells. The purpose of this study was to determine whether SCP-2, under oxidative stress conditions, might also traffic hydroperoxides of cholesterol, thereby disseminating their cytotoxic effects. Two inhibitors, SCPI-1 and SCPI-3, known to block cholesterol binding by an insect SCP-2, were used to investigate this. A mouse fibroblast transfectant clone (SC2F) overexpressing SCP-2 was found to be substantially more sensitive to apoptotic killing induced by liposomal 7α-hydroperoxycholesterol (7α-OOH) than a wild-type control. 7α-OOH uptake by SC2F cells and resulting apoptosis were both inhibited by SCPI-1 or SCPI-3 at a subtoxic concentration. Preceding cell death, reactive oxidant accumulation and loss of mitochondrial membrane potential were also strongly inhibited. Similar SCPI protection against 7α-OOH was observed with two other types of SCP-2-expressing mammalian cells. In striking contrast, neither inhibitor had any effect on H(2)O(2)-induced cell killing. To learn whether 7α-OOH cytotoxicity is due to uptake/transport by SCP-2, we used a fluorescence-based competitive binding assay involving recombinant SCP-2, NBD-cholesterol, and SCPI-1/SCPI-3 or 7α-OOH. The results clearly showed that 7α-OOH binds to SCP-2 in SCPI-inhibitable fashion. Our findings suggest that cellular SCP-2 not only binds and translocates cholesterol but also cholesterol hydroperoxides, thus expanding their redox toxicity and signaling ranges under oxidative stress conditions.
Collapse
Affiliation(s)
- Tamas Kriska
- Department of Biochemistry, Medical College of Wisconsin, Milwaukee, WI, USA
| | | | | | | |
Collapse
|
13
|
Kim MS, Lan Q. Sterol carrier protein-x gene and effects of sterol carrier protein-2 inhibitors on lipid uptake in Manduca sexta. BMC PHYSIOLOGY 2010; 10:9. [PMID: 20534138 PMCID: PMC2903571 DOI: 10.1186/1472-6793-10-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2009] [Accepted: 06/09/2010] [Indexed: 01/04/2023]
Abstract
BACKGROUND Cholesterol uptake and transportation during the feeding larval stages are critical processes in insects because they are auxotrophic for exogenous (dietary) cholesterol. The midgut is the main site for cholesterol uptake in many insects. However, the molecular mechanism by which dietary cholesterol is digested and absorbed within the midgut and then released into the hemolymph for transportation to utilization or storage sites is poorly understood. Sterol carrier proteins (SCP), non-specific lipid transfer proteins, have been speculated to be involved in intracellular cholesterol transfer and metabolism in vertebrates. Based on the high degree of homology in the conserved sterol transfer domain to rat and human SCP-2, it is supposed that insect SCP-2 has a parallel function to vertebrate SCP-2. RESULTS We identified the Manduca sexta sterol carrier protein-x and the sterol carrier protein-2 (MsSCP-x/SCP-2) gene from the larval fat body and the midgut cDNAs. The MsSCP-x/SCP-2 protein has a high degree of homology in the SCP-2 domain to other insects' SCP-2. Transcripts of MsSCP-2 were detected at high levels in the midgut and the fat body of M. sexta during the larval stages. Recombinant MsSCP-2 bound to NBD-cholesterol with high affinity, which was suppressed by sterol carrier protein-2 inhibitors. CONCLUSIONS The results suggest that MsSCP-2 may function as a lipid carrier protein in vivo, and targeting insect SCP-2 may be a viable approach for the development of new insecticides.
Collapse
Affiliation(s)
- Min-Sik Kim
- Division of Pharmaceutical Sciences, School of Pharmacy, University of Wisconsin, 777 Highland Avenue, Madison, WI 53705-2222, USA
| | - Que Lan
- Department of Entomology, University of Wisconsin, 1630 Linden Drive, Madison, WI 53706, USA
| |
Collapse
|
14
|
LARSON RYANT, LORCH JEFFREYM, PRIDGEON JULIAW, BECNEL JAMESJ, CLARK GARYG, LAN QUE. The biological activity of alpha-mangostin, a larvicidal botanic mosquito sterol carrier protein-2 inhibitor. JOURNAL OF MEDICAL ENTOMOLOGY 2010; 47:249-57. [PMID: 20380307 PMCID: PMC2855149 DOI: 10.1603/me09160] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
alpha-Mangostin derived from mangosteen was identified as a mosquito sterol carrier protein-2 inhibitor via high throughput insecticide screening, alpha-Mangostin was tested for its larvicidal activity against third instar larvae of six mosquito species, and the median lethal concentration values range from 0.84 to 2.90 ppm. The residual larvicidal activity of alpha-mangostin was examined under semifield conditions. The results indicated that alpha-mangostin was photolytic with a half-life of 53 min in water under full sunlight exposure. The effect of alpha-mangostin on activities of major detoxification enzymes such as P450, glutathione S-transferase, and esterase was investigated. The results showed that alpha-mangostin significantly elevated activities of P450 and glutathione S-transferase in larvae, whereas it suppressed esterase activity. Toxicity of alpha-mangostin against young rats was studied, and there was no detectable adverse effect at dosages as high as 80 mg/kg. This is the first multifaceted study of the biological activity of alpha-mangostin in mosquitoes. The results suggest that alpha-mangostin may be a lead compound for the development of a new organically based mosquito larvicide.
Collapse
Affiliation(s)
- RYAN T. LARSON
- Department of Entomology, University of Wisconsin, Madison, WI 53706
| | - JEFFREY M. LORCH
- Molecular and Environmental Toxicology Center, University of Wisconsin, Madison, WI 53706
| | - JULIA W. PRIDGEON
- U.S. Department of Agriculture-Agricultural Research Service, Center for Medical and Veterinary Entomology, 1600 S.W. 23rd Drive, Gainesville, FL 32608
| | - JAMES J. BECNEL
- U.S. Department of Agriculture-Agricultural Research Service, Center for Medical and Veterinary Entomology, 1600 S.W. 23rd Drive, Gainesville, FL 32608
| | - GARY G. CLARK
- U.S. Department of Agriculture-Agricultural Research Service, Center for Medical and Veterinary Entomology, 1600 S.W. 23rd Drive, Gainesville, FL 32608
| | - QUE LAN
- Department of Entomology, University of Wisconsin, Madison, WI 53706
- Corresponding author: Department of Entomology, University of Wisconsin, 1630 Linden Drive, Madison, WI 53706 ()
| |
Collapse
|
15
|
Li T, Lan Q, Liu N. Larvicidal activity of mosquito sterol carrier protein-2 inhibitors to the insecticide-resistant mosquito Culex quinquefasciatus (Diptera: Culicidae). JOURNAL OF MEDICAL ENTOMOLOGY 2009; 46:1430-1435. [PMID: 19960692 DOI: 10.1603/033.046.0626] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
AeSCP-2 inhibitors (SCPIs) compete with cholesterol for binding to a mosquito sterol carrier protein-2 (AeSCP-2) known to aid in the uptake of cholesterol in mosquito cells. The larvicidal activities of AeSCP-2 inhibitor-1 (SCPI-1) and inhibitor-2 (SCPI-2) against Culex quinquefasciatus Say (Diptera: Culicidae) were therefore examined in insecticide-resistant Culex mosquitoes HAmCq(G9), MAmCq(G2), and BAmCq(G0). All of the resistant Culex mosquito strains exhibited similar sensitivity to SCPI-1 and SCPI-2 inhibitors compared with a susceptible S-Lab strain. When an AeSCP-2 inhibitor was applied simultaneously with permethrin, the toxicity of permethrin to the second-instar larvae of all four strains of Culex mosquitoes increased, suggesting a synergistic effect of AeSCP-2 inhibitors on the toxicity of permethrin against Culex mosquitoes. Both SCPI-1 and SCPI-2 inhibitors caused a 2.4- to 3-fold reduction in the level of permethrin resistance in the highly resistant strain HAmCq(G9). This result suggests that the mode of action of the AeSCP-2 inhibitors, which reduces the uptake of cholesterol by inhibiting the function of AeSCP-2 in mosquito cells, may interfere with the mechanisms or ability that govern permethrin resistance in the HAmCq(G9) mosquito strain.
Collapse
Affiliation(s)
- Ting Li
- Department of Entomology and Plant Pathology, Auburn University, Auburn, AL 36849, USA
| | | | | |
Collapse
|