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Meepagala KM, Estep AS. Larvicidal constituents from Poncirus trifoliata root extracts. JOURNAL OF MEDICAL ENTOMOLOGY 2023; 60:1016-1021. [PMID: 37409987 DOI: 10.1093/jme/tjad086] [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: 03/07/2023] [Revised: 05/13/2023] [Accepted: 06/23/2023] [Indexed: 07/07/2023]
Abstract
In the search for effective and environmentally friendly mosquito control agents, we have examined natural sources, such as microbes and plants, and the synthetic analogs of natural products. These plants and microbes have evolved in their ecological niches to produce defensive compounds against other competing organisms in their surroundings such as microbes, plants, and insects as a means to enhance their survival. Thus, some of these plants and microbes have bioactive compounds with insecticidal, fungicidal, and phytotoxic activities. In our previous research, we successfully isolated bioactive constituents from natural sources. We have carried out synthetic modifications and total synthesis of marginally active isolated compounds to achieve significantly higher active compounds. We have focused on plants in the Rutaceae family as the members of this family are known to possess bioactive compounds with algicidal, antifungal, insecticidal, and fungicidal activities. In this article, we report the isolation and structure elucidation of mosquito larvicidal constituents from Poncirus trifoliata (Rutaceae) root extract.
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Affiliation(s)
- Kumudini M Meepagala
- USDA-ARS, Natural Products Utilization Research Unit, PO Box 1848, University, MS 38677, USA
| | - Alden S Estep
- USDA-ARS, Mosquito and Fly Research Unit, 1600 S.W. 23rd Drive, Gainesville, FL 32608, USA
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2
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Kearney SE, Gangano AJ, Barrus DG, Rehrauer KJ, Reid TER, Navaratne PV, Tracy EK, Roitberg A, Ghiviriga I, Cunningham CW, Gamage T, Grenning AJ. Axially Chiral Cannabinoids: Design, Synthesis, and Cannabinoid Receptor Affinity. J Am Chem Soc 2023. [PMID: 37314891 DOI: 10.1021/jacs.3c00129] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The resorcinol-terpene phytocannabinoid template is a privileged scaffold for the development of diverse therapeutics targeting the endocannabinoid system. Axially chiral cannabinols (axCBNs) are unnatural cannabinols (CBNs) that bear an additional C10 substituent, which twists the cannabinol biaryl framework out of planarity creating an axis of chirality. This unique structural modification is hypothesized to enhance both the physical and biological properties of cannabinoid ligands, thus ushering in the next generation of endocannabinoid system chemical probes and cannabinoid-inspired leads for drug development. In this full report, we describe the philosophy guiding the design of axCBNs as well as several synthetic strategies for their construction. We also introduce a second class of axially chiral cannabinoids inspired by cannabidiol (CBD), termed axially chiral cannabidiols (axCBDs). Finally, we provide an analysis of axially chiral cannabinoid (axCannabinoid) atropisomerism, which spans two classes (class 1 and 3 atropisomers), and provide first evidence that axCannabinoids retain─and in some cases, strengthen─affinity and functional activity at cannabinoid receptors. Together, these findings present a promising new direction for the design of novel cannabinoid ligands for drug discovery and exploration of the complex endocannabinoid system.
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Affiliation(s)
- Sara E Kearney
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Anghelo J Gangano
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Daniel G Barrus
- Analytical Chemistry and Pharmaceutics, RTI International, Research Triangle Park, North Carolina 27709, United States
| | - Kyle J Rehrauer
- Concordia University Wisconsin School of Pharmacy, Mequon, Wisconsin 53097, United States
| | - Terry-Elinor R Reid
- Concordia University Wisconsin School of Pharmacy, Mequon, Wisconsin 53097, United States
| | - Primali V Navaratne
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Emily K Tracy
- Analytical Chemistry and Pharmaceutics, RTI International, Research Triangle Park, North Carolina 27709, United States
| | - Adrian Roitberg
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Ion Ghiviriga
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | | | - Thomas Gamage
- Analytical Chemistry and Pharmaceutics, RTI International, Research Triangle Park, North Carolina 27709, United States
| | - Alexander J Grenning
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
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Song S, Wan M, Luo Y, Shen H, Shen J. Carboxymethyl Chitosan-Modified Graphene Oxide as a Multifunctional Vector for Deltamethrin Delivery and pH-Responsive Controlled Release, Enhanced Leaf Affinity, and Improved Mosquito-Killing Activity. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:12148-12156. [PMID: 36166331 DOI: 10.1021/acs.langmuir.2c01669] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Traditional deltamethrin (DM) formulations (e.g., emulsifiable concentrates, wettable powders, etc.) have significant disadvantages of poor water dispersion stability, burst release, weak leaf affinity, short duration, poor efficacy, and high environmental toxicity. A nanomaterial-based pesticide delivery system (PDS) has provided effective strategies for green preparation and synergism of pesticide formulations. In this article, we developed carboxymethyl chitosan (CMCS)-modified graphene oxide (GO) as a vector for DM and constructed a pH-responsive PDS for Culex pipiens pallens control. GO-CMCS possesses excellent pesticide loading performance for DM (loading rate 87.76%). After being loading on GO-CMCS, the GO-CMCS-DM has a significantly improved dispersion stability in water. The GO-CMCS-DM exhibits pH-responsive controlled release performance, which can sustain the release of DM into the medium, maintaining an effective long-term concentration. Additionally, the leaf adhesion of GO-CMCS-DM is better than that for free DM, which can improve the pesticide utilization. Therefore, GO-CMCS-DM has a prolonged persistent period and sustained activity against Culex pipiens pallens. Considering the industrialization potential of GO, we believe that GO will play an important role in the pest control and antiepidemic fields.
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Affiliation(s)
- Saijie Song
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Minghui Wan
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Yi Luo
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - He Shen
- CAS Key Laboratory of Nano-Bio Interface, CAS Center for Excellence in Nanoscience, Division of Nanobiomedicine, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
| | - Jian Shen
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
- Jiangsu Engineering Research Center of Interfacial Chemistry, Nanjing University, Nanjing 210023, China
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McComic SE, Meepagala KM, Swale DR. Characterization of Toxicological and Neurophysiological Effects of Natural Product Based Chromenes to Fall Armyworm, Spodoptera frugiperda. JOURNAL OF ECONOMIC ENTOMOLOGY 2021; 114:2485-2492. [PMID: 34499738 DOI: 10.1093/jee/toab172] [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: 07/11/2021] [Indexed: 06/13/2023]
Abstract
We previously extracted and purified a chromene amide from Amyris texana and found this scaffold is moderately insecticidal and thus, this study aimed to test the insecticidal properties of 13 synthetically derived chromene analogs to the fall armyworm (FAW, Spodoptera frugiperda). Microinjection of chromenes with alcohol or aldehydes substitutions at the meta position on the benzopyran moiety led to moderate toxicity that was approximately 2- to 3-fold less toxic when compared to permethrin, yet microinjection of differently substituted chromenes exhibited little to no toxicity. Similarly, chromenes with alcohol or aldehydes substitutions at the meta position on the benzopyran moiety were among the most toxic chromenes studied through ingested exposure. In addition to acute toxicity, select chromenes significantly increased the percentage of developmental defects upon eclosion that prevented adult moths from being capable of flight, suggesting these compounds alter development. Interestingly, microinjection yielded differing signs of intoxication between alcohol and aldehyde substitutions where the alcohol resulted in flaccid paralysis and lethargy whereas aldehyde led to tonic contractions and hyperactivity. These contrasting signs of intoxication were also observed in electrophysiological assays where alcohol substitutions led to the depression of central neuron firing activity and aldehyde substitutions led to hyperexcitation of central neurons. In summary, the chromene amides led to acute lethality and/or altered developmental trajectories of FAW, yet the high doses required for acute mortality suggest these scaffolds hold relatively little promise for development into FAW-directed insecticides but may represent novel growth regulators for FAW.
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Affiliation(s)
- Sarah E McComic
- Department of Entomology, Louisiana State University AgCenter, Baton Rouge, LA 70803, USA
| | - Kumudini M Meepagala
- Natural Products Utilization Research Unit, USDA-ARS, PO Box 1848, University, MS 38677, USA
| | - Daniel R Swale
- Department of Entomology, Louisiana State University AgCenter, Baton Rouge, LA 70803, USA
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Akihara Y, Kamikawa S, Harauchi Y, Ohta E, Nehira T, Ômura H, Ohta S. Hydroxylated furanoditerpenoids from pupal cases produced by the bruchid beetle Sulcobruchus sauteri inside the seeds of Caesalpinia decapetala. PHYTOCHEMISTRY 2018; 156:151-158. [PMID: 30296708 DOI: 10.1016/j.phytochem.2018.09.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 09/14/2018] [Accepted: 09/25/2018] [Indexed: 06/08/2023]
Abstract
Seven undescribed hydroxylated cassane-type furanoditerpenoids were isolated from pupal cases formed from the secretion/excretion of the larvae of the wild bruchid seed beetle Sulcobruchus sauteri in infested Caesalpinia decapetala seeds, and their structures were elucidated by interpreting their spectra. The hydroxylated furanoditerpenoids found in the pupal cases were not present in the seeds of the host plant. Caesalacetal and caesaljapin obtained from the intact seeds exhibited larvicidal activity against the larvae of Aedes albopictus, while the hydroxylated furanoditerpenoids isolated from the pupal cases were inactive. The larvae of S. sauteri are proposed to detoxify larvicidal diterpenoids that occur in the seeds of the host plant by regiospecific hydroxylation.
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Affiliation(s)
- Yui Akihara
- Graduate School of Biosphere Science, Hiroshima University, 1-7-1 Kagamiyama, Higashi-Hiroshima 739-8521, Japan
| | - Sayuri Kamikawa
- Graduate School of Biosphere Science, Hiroshima University, 1-7-1 Kagamiyama, Higashi-Hiroshima 739-8521, Japan
| | - Yui Harauchi
- Graduate School of Biosphere Science, Hiroshima University, 1-7-1 Kagamiyama, Higashi-Hiroshima 739-8521, Japan
| | - Emi Ohta
- Graduate School of Biosphere Science, Hiroshima University, 1-7-1 Kagamiyama, Higashi-Hiroshima 739-8521, Japan
| | - Tatsuo Nehira
- Graduate School of Integrated Arts and Sciences, Hiroshima University, 1-7-1 Kagamiyama, Higashi-Hiroshima 739-8521, Japan
| | - Hisashi Ômura
- Graduate School of Biosphere Science, Hiroshima University, 1-7-1 Kagamiyama, Higashi-Hiroshima 739-8521, Japan
| | - Shinji Ohta
- Graduate School of Biosphere Science, Hiroshima University, 1-7-1 Kagamiyama, Higashi-Hiroshima 739-8521, Japan.
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Meepagala KM, Estep AS, Clausen BM, Becnel JJ. Mosquitocidal Activity of a Naturally Occurring Isochroman and Synthetic Analogs from the Plant Pathogenic Fungus, Diaporthe eres Against Aedes aegypti (Diptera: Culicidae). JOURNAL OF MEDICAL ENTOMOLOGY 2018; 55:969-974. [PMID: 29474636 DOI: 10.1093/jme/tjy016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Indexed: 06/08/2023]
Abstract
The culture filtrate of a plant pathogenic fungus that infects English ivy (Hedera helix L., Araliaceae) was investigated for mosquitocidal constituents by bioassay-guided isolation. The fungus responsible for pathogenic effects on the plant H. helix has been identified as Diaporthe eres Nitschke by molecular techniques. The mosquito adulticidal constituent in the culture filtrate was identified as 3,4-dihydro-8-hydroxy-3,5-dimethylisocoumarin (1) by spectroscopic techniques. Laboratory bioassays showed that (1) had larvicidal activity against permethrin-susceptible and -resistant Aedes aegypti strains. This compound was not active as an adulticide when tested by topical bioassay. Several analogs of (1) were synthesized and had better mosquitocidal activities than the naturally occurring (1) constituent.
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Affiliation(s)
| | - Alden S Estep
- USDA, ARS, CMAVE, Gainesville, FL
- Navy Entomology Center of Excellence, CMAVE Detachment, Gainesville, FL
| | - Brandon M Clausen
- USDA-ARS, Natural Products Utilization Research Unit, University, MS
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Arbabi HA, Soltani SS, Salehi H, Rezazadeh S, Zonouzi A, Toosibashi M. Convenient Synthesis of Heterocyclic Azo Dyes in the Class of Pyranopyrazoles and Chromenes. JOURNAL OF CHEMICAL RESEARCH 2018. [DOI: 10.3184/174751918x15177611816526] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A series of novel azo group fused 2 H-chromenes and 4 H-chromenes were synthesised as well as pyranopyrazole derivatives via the Knoevenagel condensation reaction of C–H acid compounds with 5-(arylazo)salicylaldehydes by a nucleophilic addition to the carbonyl group followed cyclisation.
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Affiliation(s)
| | - Siavash Salek Soltani
- School of Chemistry, University College of Science, University of Tehran, Tehran, Iran
| | - Hasan Salehi
- School of Chemistry, University College of Science, University of Tehran, Tehran, Iran
| | - Shahla Rezazadeh
- School of Chemistry, University College of Science, University of Tehran, Tehran, Iran
| | - Afsaneh Zonouzi
- School of Chemistry, University College of Science, University of Tehran, Tehran, Iran
| | - Mansoureh Toosibashi
- School of Chemistry, University College of Science, University of Tehran, Tehran, Iran
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