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Park JH, Huh MJ, Lee JW, Lee MW, Lee DH, Nam I, Park IK. Seasonal occurrence of bark and woodboring Coleoptera in stands of Pinus densiflora (Pinales: Pinaceae) and Larix kaempferi (Pinales: Pinaceae) and monitoring method using multifunnel traps baited with pine volatiles. J Econ Entomol 2023; 116:2014-2026. [PMID: 37774406 DOI: 10.1093/jee/toad175] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 08/13/2023] [Accepted: 08/24/2023] [Indexed: 10/01/2023]
Abstract
This study investigated the seasonal occurrence of bark and woodboring Coleoptera in Pinus densiflora (Pinales: Pinaceae), and Larix kaempferi (Pinales: Pinaceae) stands using multifunnel traps baited with pine volatiles in Korea. The number and species of bark and woodboring beetles caught in traps baited with ethanol, α-pinene, and ethanol+α-pinene were compared to determine the effective attractants. In addition, the effects of other pine volatiles, such as (-)-β-pinene, β-caryophyllene, (±)-limonene, β-myrcene, and 3-carene, were investigated. A total of 13,134 woodboring beetles from 150 species were collected from pine and larch stands from 2019 to 2020. Tomicus minor (Hartig) (Coleoptera: Curculionidae) adults were more attracted to traps baited with α-pinene, whereas Xyleborinus saxesenii (Ratzeburg) (Coleoptera: Curculionidae), Cyclorhipidion pelliculosum (Eichhoff) (Coleoptera: Curculionidae), and Phloeosinus pulchellus (Blandford) (Coleoptera: Curculionidae) adults were more attracted to traps baited with ethanol. Hylurgops interstitialis (Chapuis) (Coleoptera: Curculionidae), Shirahoshizo genus group, Rhagium inquisitor (Linne) (Coleoptera: Cerambycidae), and Rhadinomerus maebarai (Voss & Chûjô) (Coleoptera: Curculionidae) were more frequently attracted to traps baited with ethanol+α-pinene than to traps baited with other attractants. The addition of 3-carene to ethanol+α-pinene enhanced the capture of H. interstitialis, R. inquisitor, and Hylobius (Callirus) haroldi (Faust) (Coleoptera: Curculionidae).
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Affiliation(s)
- Ji-Hong Park
- Department of Agriculture, Forestry, and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Min-Jung Huh
- Department of Agriculture, Forestry, and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Jae-Woo Lee
- Department of Agriculture, Forestry, and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Min-Woo Lee
- Department of Agriculture, Forestry, and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Dong-Ho Lee
- Department of Agriculture, Forestry, and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Il Nam
- Department of Agriculture, Forestry, and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Il-Kwon Park
- Department of Agriculture, Forestry, and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
- Research Institute of Agriculture and Life Science, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
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Lee MW, Lee DH, Nam I, Lee JW, Huh MJ, Park IK. Acaricidal and Insecticidal Activities of Essential Oils and Constituents of Tasmannia lanceolata (Poir.) A.C.Sm. (Canellales: Winteraceae) Against Tetranychus urticae Koch (Trombidiformes: Tetranychidae) and Myzus persicae Sulzer (Hemiptera: Aphididae). J Econ Entomol 2023; 116:447-455. [PMID: 36708054 DOI: 10.1093/jee/toad011] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Indexed: 05/30/2023]
Abstract
The negative side effects of synthetic pesticides have drawn attention to the need for environmentally friendly agents to control arthropod pests. To identify promising candidates as botanical pesticides, we investigated the acaricidal and insecticidal activities of 44 plant-derived essential oils (EOs) against Tetranychus urticae Koch and Myzus persicae Sulzer. Among the tested EOs, Tasmannia lanceolata (Poir.) A.C.Sm. (Tasmanian pepper) essential oil (TPEO) exhibited strong acaricidal and insecticidal activity. Mortality rates of 100% and 71.4% against T. urticae and M. persicae, respectively, were observed with TPEO at a concentration of 2 mg/ml. Polygodial was determined to be the primary active component after bioassay-guided isolation of TPEO using silica gel open-column chromatography, gas chromatography, and gas chromatography-mass spectrometry. Polygodial demonstrated acaricidal activity against T. urticae with mortality rates of 100%, 100%, 61.9%, and 61.6% at concentrations of 1, 0.5, 0.25, and 0.125 mg/ml, respectively. Insecticidal activity against M. persicae was also evident, with mortality rates of 88.5%, 85.0%, 46.7%, and 43.3% at respective concentrations of 1, 0.5, 0.25, and 0.125 mg/ml. Insecticidal and acaricidal activities of TPEO were greater than those of Eungjinssag, a commercially available organic agricultural material for controlling mites and aphids in the Republic of Korea. These findings suggest that TPEO is a promising candidate for mites and aphids control.
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Affiliation(s)
- Min-Woo Lee
- Department of Agriculture, Forestry, and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Dong-Ho Lee
- Department of Agriculture, Forestry, and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Il Nam
- Department of Agriculture, Forestry, and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Jae-Woo Lee
- Department of Agriculture, Forestry, and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Min-Jung Huh
- Department of Agriculture, Forestry, and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Il-Kwon Park
- Research Institute of Agriculture and Life Science, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
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Nam I, Park JH, Lee JW, Lee DH, Jung W, Lee U, Park IK. Field Confirmation of (Z)-9-Heptacosene and (3Z,6Z,9Z)-Tricosatriene as Key Sex Pheromone Components of Korean Conogethes punctiferalis Guenée (Lepidoptera: Crambidae). J Econ Entomol 2022; 115:1976-1986. [PMID: 36318509 DOI: 10.1093/jee/toac161] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Indexed: 06/16/2023]
Abstract
Recently, insufficient attractiveness of Conogethes punctiferalis Guenée adult males to sex pheromone, -(E)-10-hexadecenal and (Z)-10-hexadecenal, has been reported. To identify the other essential components of sex pheromone, male and female body extracts were analyzed. Two hydrocarbon components, (Z)-9-heptacosene (Z9-27:HC) and (3Z,6Z,9Z)-tricosatriene (Z3,Z6,Z9-23:HC), were identified from only female body extract. There was a significant difference in the electroantennogram (EAG) response of male antennae to Z3,Z6,Z9-23:HC and Z9-27:HC at all test concentrations compared to the response to the hexane control. In field attraction testing, the addition of Z9-27:HC and Z3,Z6,Z9-23:HC to binary aldehyde pheromones significantly increased trap catches of C. punctiferalis male adults. Based on the female and male body extract analysis and field attraction test, Z9-27:HC and Z3,Z6,Z9-23:HC were determined to be other essential sex pheromone components of the Korean C. punctiferalis population. No significant difference was observed in the number of male captures between the bucket trap and delta trap. Pheromone traps with a color close to yellow shade attracted more male adults than traps with a color close to blue shade.
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Affiliation(s)
- Il Nam
- Department of Agriculture, Forestry and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Ji-Hong Park
- Department of Agriculture, Forestry and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Jae-Woo Lee
- Department of Agriculture, Forestry and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Dong Ha Lee
- Korea Institute of Insect Pheromone, Yuseong-gu, Daejeon 34158, Republic of Korea
| | - Wanjo Jung
- Korea Institute of Insect Pheromone, Yuseong-gu, Daejeon 34158, Republic of Korea
| | - Uk Lee
- National Institute of Forest Science, Suwon 16631, Republic of Korea
| | - Il-Kwon Park
- Department of Agriculture, Forestry and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
- Research Institute of Agriculture and Life Science, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
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Lee MW, Lee DH, Nam I, Lee JW, Huh MJ, Roh GH, Park IK. Acaricidal Activities of Dioscorea japonica Thunb. (Dioscoreales: Dioscoreaceae) Extract and its Constituents Against the Two-spotted Spider Mite, Tetranychus urticae Koch (Trombidiformes: Tetranychidae). J Econ Entomol 2022; 115:1921-1929. [PMID: 36287632 DOI: 10.1093/jee/toac164] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Indexed: 06/16/2023]
Abstract
The acaricidal activities of 86 plant extracts were investigated under laboratory conditions. The ethanol extract of Dioscorea japonica Thunb. root showed the strongest acaricidal activity, with 89.3% mortality against two-spotted spider mite, Tetranychus urticae Koch adults at a 2 mg/ml concentration. Bioassay-guided isolation of D. japonica root extract using silica gel open column chromatography, gas chromatography (GC), and gas chromatography-mass spectrometry (GC-MS) identified palmitic acid as the primary active compound. The acaricidal activities of palmitic acid against T. urticae were 91.2% and 69.7% at concentrations of 1 and 0.5 mg/ml, respectively. Among nine saturated fatty acids with carbon chains ranging from C8 to C26, the most vigorous acaricidal activity was observed with octanoic acid, followed by palmitic acid, and decanoic acid at a 1 mg/ml concentration. The acaricidal activity of the other fatty acids was less than 40% mortality at a 1 mg/ml concentration. These results indicate that a suitable carbon length is essential for fatty acids to exhibit acaricidal activity. The acaricidal efficacy of Eungjinssag (EJSG), an organic agricultural material authorized for the management of mites in the Republic of Korea, was compared to D. japonica root extract. At concentrations above 1 mg/ml, the acaricidal activity of D. japonica root extract was stronger than that of EJSG. The results of this study show that D. japonica root extract and palmitic acid are promising candidates as new environmentally-friendly control agents against two-spotted spider mite, which is one of the most severely damaging agricultural arthropod pests.
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Affiliation(s)
- Min-Woo Lee
- Department of Agriculture, Forestry, and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Dong-Ho Lee
- Department of Agriculture, Forestry, and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Il Nam
- Department of Agriculture, Forestry, and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Jae-Woo Lee
- Department of Agriculture, Forestry, and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Min-Jung Huh
- Department of Agriculture, Forestry, and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Gwang-Hyun Roh
- Department of Plant Medicine and Institute of Agriculture and Life Science, Gyeongsang National University, Jinju 52828, Republic of Korea
- Research Institute of Agriculture and Life Science, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Il-Kwon Park
- Department of Agriculture, Forestry, and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
- Research Institute of Agriculture and Life Science, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
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Lee SC, Lee JW, Lee DH, Huh MJ, Nam I, Park JH, Jung M, Park IK. Identification of Sex Pheromone Components of Korean Dioryctria abietella (Lepidoptera: Pyralidae) Population and Synergism of Pheromone and Pine Cone Volatile Blends. J Econ Entomol 2022; 115:178-186. [PMID: 34865067 DOI: 10.1093/jee/toab227] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Indexed: 06/13/2023]
Abstract
(9Z,11E)-tetradecadienyl acetate (9Z,11E-14:OAc) and (3Z,6Z,9Z,12Z,15Z)-pentacosapentaene (C25 pentaene), known as the sex pheromone of the European Dioryctria abietella population, were identified in the Korean D. abietella population. The ratio of 9Z,11E-14:OAc to C25 pentaene extracted from female pheromone glands was 1:23. The electroantennogram (EAG) response of male antennae to 9Z,11E-14:OAc was stronger than to C25 pentaene, whereas an opposite EAG response was observed in female antennae. Major volatile compounds in mature Korean pine cone (Pinus koraiensis), such as limonene, myrcene, and (-)-α-pinene, elicited dose-dependent EAG responses of male and female antennae. In field attraction testing, traps baited with 100:1,000, 100:2,000, and 100:3,000 ug of 9Z,11E-14:OAc to C25 pentaene were the most attractive to male D. abietella. More males were attracted to traps baited with 9Z,11E-14:OAc+C25 pentaene+limonene than traps baited with 9Z,11E-14:OAc+C25 pentaene. This showed that limonene acted as a synergist to sex pheromone. Delta traps, wing traps, and diamond traps were superior to bucket traps for capturing D. abietella males. This study showed that pheromone traps baited with 100:1,000 ~ 100:3,000 ug of 9Z,11E-14:OAc to C25 pentaene and limonene will be useful for the exact monitoring of D. abietella flight phenology in Pinus koraiensis Sieb. & Zucc. (Pinales: Pinaceae) forests.
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Affiliation(s)
- Sung-Chan Lee
- Department of Agriculture, Forestry and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
- Kyungnong, Seocho-gu, Seoul, Republic of Korea
| | - Jae-Woo Lee
- Department of Agriculture, Forestry and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
| | - Dong Ha Lee
- Korea Institute of Insect Pheromone, Yuseong-gu, Daejeon, Republic of Korea
| | - Min-Jung Huh
- Department of Agriculture, Forestry and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
| | - Il Nam
- Department of Agriculture, Forestry and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
| | - Ji-Hong Park
- Department of Agriculture, Forestry and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
| | - Myunghee Jung
- Bioinformatics Group, R&D Center, Insilicogen, Inc., Yongin-si, Gyeonggi-do, Republic of Korea
| | - Il-Kwon Park
- Department of Agriculture, Forestry and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
- Research Institute of Agriculture and Life Science, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
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Yang E, Lee JW, Chang PS, Park IK. Development of chitosan-coated nanoemulsions of two sulfides present in onion (Allium cepa) essential oil and their nematicidal activities against the pine wood nematode, Bursaphelenchus xylophilus. Environ Sci Pollut Res Int 2021; 28:69200-69209. [PMID: 34291413 DOI: 10.1007/s11356-021-15451-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Accepted: 07/11/2021] [Indexed: 05/02/2023]
Abstract
Pine wood nematode, Bursaphelenchus xylophilus, is a plant parasitic nematode which causes severe damage to several Pinus species. Two natural compounds, dipropyl trisulfide (DPTS) and methyl propyl trisulfide (MPTS), showed strong nematicidal activity against the pine wood nematode, presenting 4.24 and 17.81 μg/mL LC50 values, respectively. However, hydrophobicity and low stability have limited their practical use in the field as nematicides. To overcome these problems, chitosan-coated nanoemulsions of DPTS and MPTS were developed. The optimum chitosan concentration for the delivery system of the two sulfides was 0.5%. Optimized chitosan-coated nanoemulsions of sulfides have a uniform size distribution (mean diameter = 203.7 and 207.7 nm, mean polydispersity index = 0.176 and 0.178) with sufficient colloidal stability (mean zeta potential = +40 and +45 mV). The LC50 values of DPTS and MPTS nanoemulsions coated with 0.5% chitosan against the pine wood nematode were 5.01 and 16.60 μg/mL, respectively. In addition, chitosan coating improved the long-term storage stability and persistence of nematicidal activity of the nanoemulsions. This study indicates that the chitosan-coated nanoemulsion is a suitable formulation for sulfides as novel nematicides against the pine wood nematode for field application.
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Affiliation(s)
- Eunhye Yang
- Department of Agricultural Biotechnology, College of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea
| | - Jae-Woo Lee
- Department of Agriculture, Forestry and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea
| | - Pahn-Shick Chang
- Department of Agricultural Biotechnology, College of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea.
- Center for Food and Bioconvergence, College of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea.
- Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea.
- Center for Agricultural Microorganism and Enzyme, Seoul National University, Seoul, 08826, Republic of Korea.
| | - Il-Kwon Park
- Department of Agriculture, Forestry and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea.
- Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea.
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Kwon JH, Huh MJ, Lee DH, Seo SM, Park IK. Effect of pheromone blends, trap type and color on the capture of male clearwing moths, Synanthedon bicingulata (Lepidoptera: Sesiidae). CHEMOECOLOGY 2021. [DOI: 10.1007/s00049-021-00352-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Hong SJ, Nam I, Kim SY, Kim E, Lee CH, Ahn S, Park IK, Kim G. Automatic Pest Counting from Pheromone Trap Images Using Deep Learning Object Detectors for Matsucoccus thunbergianae Monitoring. Insects 2021; 12:insects12040342. [PMID: 33921492 PMCID: PMC8068825 DOI: 10.3390/insects12040342] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 04/08/2021] [Accepted: 04/09/2021] [Indexed: 11/16/2022]
Abstract
Simple Summary The black pine bast scale, Matsucoccus thunbergianae, is a forest pest that causes widespread damage to black pine; therefore, monitoring this pest is necessary to minimize environmental and economic losses in forests. However, monitoring insects in pheromone traps performed by humans is labor intensive and time consuming. To develop an automated monitoring system, we aimed to develop algorithms that detect and count M. thunbergianae from images of pheromone traps using deep-learning-based object detection algorithms. Object detection models based on deep learning neural networks under various conditions were trained, and the performances of detection and counting were compared and evaluated. In addition, the models were trained to detect small objects well by cropping images into multiple windows. As a result, the algorithms based on deep learning neural networks successfully detected and counted M. thunbergianae. These results showed that accurate and constant pest monitoring is possible using the artificial-intelligence-based methods we proposed. Abstract The black pine bast scale, M. thunbergianae, is a major insect pest of black pine and causes serious environmental and economic losses in forests. Therefore, it is essential to monitor the occurrence and population of M. thunbergianae, and a monitoring method using a pheromone trap is commonly employed. Because the counting of insects performed by humans in these pheromone traps is labor intensive and time consuming, this study proposes automated deep learning counting algorithms using pheromone trap images. The pheromone traps collected in the field were photographed in the laboratory, and the images were used for training, validation, and testing of the detection models. In addition, the image cropping method was applied for the successful detection of small objects in the image, considering the small size of M. thunbergianae in trap images. The detection and counting performance were evaluated and compared for a total of 16 models under eight model conditions and two cropping conditions, and a counting accuracy of 95% or more was shown in most models. This result shows that the artificial intelligence-based pest counting method proposed in this study is suitable for constant and accurate monitoring of insect pests.
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Affiliation(s)
- Suk-Ju Hong
- Department of Biosystems Engineering, College of Agriculture and Life Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea; (S.-J.H.); (S.-Y.K.); (E.K.); (C.-H.L.); (S.A.)
| | - Il Nam
- Department of Agriculture, Forestry and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea; (I.N.); (I.-K.P.)
| | - Sang-Yeon Kim
- Department of Biosystems Engineering, College of Agriculture and Life Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea; (S.-J.H.); (S.-Y.K.); (E.K.); (C.-H.L.); (S.A.)
| | - Eungchan Kim
- Department of Biosystems Engineering, College of Agriculture and Life Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea; (S.-J.H.); (S.-Y.K.); (E.K.); (C.-H.L.); (S.A.)
- Global Smart Farm Convergence Major, College of Agriculture and Life Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea
| | - Chang-Hyup Lee
- Department of Biosystems Engineering, College of Agriculture and Life Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea; (S.-J.H.); (S.-Y.K.); (E.K.); (C.-H.L.); (S.A.)
- Global Smart Farm Convergence Major, College of Agriculture and Life Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea
| | - Sebeom Ahn
- Department of Biosystems Engineering, College of Agriculture and Life Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea; (S.-J.H.); (S.-Y.K.); (E.K.); (C.-H.L.); (S.A.)
| | - Il-Kwon Park
- Department of Agriculture, Forestry and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea; (I.N.); (I.-K.P.)
- Research Institute of Agriculture and Life Science, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea
| | - Ghiseok Kim
- Department of Biosystems Engineering, College of Agriculture and Life Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea; (S.-J.H.); (S.-Y.K.); (E.K.); (C.-H.L.); (S.A.)
- Global Smart Farm Convergence Major, College of Agriculture and Life Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea
- Research Institute of Agriculture and Life Science, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea
- Correspondence: ; Tel.: +82-2-880-4603
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Lee JE, Seo SM, Huh MJ, Lee SC, Park IK. Reactive oxygen species mediated-antifungal activity of cinnamon bark (Cinnamomum verum) and lemongrass (Cymbopogon citratus) essential oils and their constituents against two phytopathogenic fungi. Pestic Biochem Physiol 2020; 168:104644. [PMID: 32711777 DOI: 10.1016/j.pestbp.2020.104644] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 06/19/2020] [Accepted: 06/23/2020] [Indexed: 05/09/2023]
Abstract
To find new and safe type of control agents against phytopathogenic fungi, the fumigant antifungal activity of 10 plant essential oils and constituents identified in cinnamon bark (Cinnamomum verum) and lemongrass (Cymbopogon citratus) essential oils was investigated against two phytopathogenic fungi, Raffaelea quercus-mongolicae and Rhizoctonia solani. Among plant essential oils, cinnamon bark and lemongrass essential oils showed 100% inhibition of R. quercus-mongolicae and R. solani at 5 mg/paper disc, respectively. Among test constituents, salicylaldehyde, eugenol, and hydrocinnamaldehyde showed 100% inhibition of growth of R. quercus-mongolicae at 2.5 mg/paper disc. Neral, geraniol, geranial, trans-cinnamaldehyde, methyl cinnamate, isoeugenol, and methyl eugenol exhibited >80% inhibition of growth of R. quercus-mongolicae at 2.5 mg/paper disc. Neral, geranial, trans-cinnamaldehyde, hydrocinnamaldehyde, and salicylaldehyde showed 100% inhibition of growth of R. solani at 2.5 mg/paper disc. A fumigant antifungal bioassay of artificial blends of the constituents identified in cinnamon bark and lemongrass essential oils indicated that trans-cinnamaldehyde and geranial were major contributors to the fumigant antifungal activity of the artificial blend. Confocal laser scanning microscopy images of fungi treated with cinnamon bark and lemongrass essential oils, trans-cinnamaldehyde, neral, and geranial revealed the reactive oxygen species (ROS) generation and cell membrane disruption.
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Affiliation(s)
- Ji-Eun Lee
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea; Forest Insect Pests and Diseases Division, National Institute of Forest Science, Seoul 02455, Republic of Korea
| | - Seon-Mi Seo
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea; Research Institute of Agriculture and Life Science, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Min-Jung Huh
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Sung-Chan Lee
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Il-Kwon Park
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea; Research Institute of Agriculture and Life Science, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea.
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Lee JE, Jung M, Lee SC, Huh MJ, Seo SM, Park IK. Antibacterial mode of action of trans-cinnamaldehyde derived from cinnamon bark (Cinnamomum verum) essential oil against Agrobacterium tumefaciens. Pestic Biochem Physiol 2020; 165:104546. [PMID: 32359541 DOI: 10.1016/j.pestbp.2020.02.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 01/20/2020] [Accepted: 02/17/2020] [Indexed: 06/11/2023]
Abstract
The fumigant antibacterial activities of 50 plant essential oils belonging to 10 families were investigated against Agrobacterium tumefaciens. Among the test plant essential oils, Cinnamomum verum (cinnamon bark) essential oil showed the most potent fumigant antibacterial activity. When we investigated the antibacterial activities of compounds identified from cinnamon bark essential oil and 9 congeners of trans-cinnamaldehyde, lengths of inhibition zone of trans-cinnamaldehyde, salicylaldehyde and hydrocinnamaldehyde were 1.28, 1.73, and 1.24 cm at 0.625 mg/paper disc concentration, respectively. To determine the mode of action of trans-cinnamaldehyde and salicylaldehyde, intercellular reactive oxygen species (ROS) generation and cell membrane integrity were determined using a confocal laser scanning microscopy. Furthermore, we compared the up- and down-regulated gene expression of A. tumefaciens treated with trans-cinnamaldehyde and salicylaldehyde with that of untreated A. tumefaciens. With cutoffs of |log2FC| > 1 and FDR < 0.05, 29 and 43 down-regulated genes and 27 and 117 up-regulated genes were found in the treatment of trans-cinnamaldehyde and salicylaldehyde, respectively. Based on the ROS generation results, cell membrane integrity assay, and gene expression, we conclude that the antibacterial mode of action of trans-cinnamaldehyde and salicylaldehyde is ROS generation by the Fenton reaction caused by the down-regulation of an ATP synthesis-related gene cluster, corrupted iron ion homeostasis, and a corrupted ROS defense mechanism. The high concentration of ROS damaged the A. tumefaciens cell membrane, which caused cell death.
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Affiliation(s)
- Ji-Eun Lee
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea; Forest Insect Pests and Diseases Division, National Institute of Forest Science, Seoul 02455, Republic of Korea
| | - Myunghee Jung
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea; Bioinformatics Group, R&D Center, Insilicogen, Inc., Yongin-si, Gyeonggi-do 16954, Republic of Korea
| | - Sung-Chan Lee
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Min-Jung Huh
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Seon-Mi Seo
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea; Research Institute of Agriculture and Life Science, College of Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea
| | - Il-Kwon Park
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea; Research Institute of Agriculture and Life Science, College of Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea.
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Shin J, Na K, Shin S, Seo SM, Youn HJ, Park IK, Hyun J. Biological Activity of Thyme White Essential Oil Stabilized by Cellulose Nanocrystals. Biomolecules 2019; 9:biom9120799. [PMID: 31795185 PMCID: PMC6995595 DOI: 10.3390/biom9120799] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 11/22/2019] [Accepted: 11/26/2019] [Indexed: 11/19/2022] Open
Abstract
Cellulose nanocrystals (CNCs) are produced by sulfonic acid hydrolysis and used for the formation of Pickering emulsion (PE) with thyme white essential oil (EO). Highly volatile and hydrophobic thyme white is encapsulated in PE by the amphiphilicity of CNCs. Encapsulation of EO in a CNC shell is determined by confocal microscopy with distinct fluorescent labelling. The amount of CNC affects the size distribution of PE, and the emulsion stability is confirmed by rheological property. The antimicrobial activity of the emulsion is evaluated against Escherichia coli and Staphylococcus aureus by minimal inhibitory concentration and minimum bactericidal concentration. The larvicidal activity is also investigated against Aedes albopictus by dispersing the emulsion in water.
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Affiliation(s)
- Jonghyun Shin
- Department of Biosystems and Biomaterials Science and Engineering, Seoul National University, Seoul 08826, Korea; (J.S.); (S.S.)
| | - Kyunga Na
- Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea; (K.N.); (S.-M.S.); (H.J.Y.); (I.-K.P.)
| | - Sungchul Shin
- Department of Biosystems and Biomaterials Science and Engineering, Seoul National University, Seoul 08826, Korea; (J.S.); (S.S.)
| | - Seon-Mi Seo
- Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea; (K.N.); (S.-M.S.); (H.J.Y.); (I.-K.P.)
- Department of Forest Sciences, Seoul National University, Seoul 08826, Korea
| | - Hye Jung Youn
- Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea; (K.N.); (S.-M.S.); (H.J.Y.); (I.-K.P.)
- Department of Forest Sciences, Seoul National University, Seoul 08826, Korea
| | - Il-Kwon Park
- Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea; (K.N.); (S.-M.S.); (H.J.Y.); (I.-K.P.)
- Department of Forest Sciences, Seoul National University, Seoul 08826, Korea
| | - Jinho Hyun
- Department of Biosystems and Biomaterials Science and Engineering, Seoul National University, Seoul 08826, Korea; (J.S.); (S.S.)
- Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea; (K.N.); (S.-M.S.); (H.J.Y.); (I.-K.P.)
- Correspondence: ; Tel.: +82-2-880-4624
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Lee SC, Kwon JH, Cha DJ, Kim DS, Lee DH, Seo SM, Lee HR, Huh MJ, Jung M, Park IK. Effects of Pheromone Dose and Trap Height on Capture of a Bast Scale of Pine, Matsucoccus thunbergianae (Hemiptera: Margarodidae) and Development of a New Synthesis Method. J Econ Entomol 2019; 112:1752-1759. [PMID: 31009531 DOI: 10.1093/jee/toz079] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Indexed: 06/09/2023]
Abstract
Matsuone is a well-known sex pheromone of the genus Matsucoccus (Hemiptera: Margarodidae), including species Matsucoccus matsumurae (Kuwana), Matsucoccus resinosae Bean & Goldwin, and Matsucoccus thunbergianae Miller & Park. In this study, we investigated the effects of matsuone dose and trap height on the capture of M. thunbergianae and developed an alternative synthesis of racemic matsuone. In field trapping experiments, M. thunbergianae males showed dose-dependent attraction to (6R,10R/S)-matsuone from 100 μg up to an approximate saturation level of 1,600 μg per rubber septum lure. Traps baited with (6R,10R/S)-matsuone and installed 50 cm above ground level attracted more males than traps 100 and 150 cm above ground level. To reduce synthesis procedures, time, and labor, we developed a new synthetic route to racemic matsuone and conducted field experiments with the product. Although traps baited with the racemic matsuone were less attractive than traps baited with (6R,10R/S)-matsuone synthesized by a previously reported method, the new synthetic route could be an economically favorable alternative to the previous method used in production of lures for field application.
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Affiliation(s)
- Sung-Chan Lee
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
| | - Jun Hyeong Kwon
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
| | - Deok Jea Cha
- Forest Biomaterials Research Center, National Institute of Forest Science, Jinju, Gyeongnam, Republic of Korea
| | - Dong-Soo Kim
- Forest Biomaterials Research Center, National Institute of Forest Science, Jinju, Gyeongnam, Republic of Korea
| | - Dong Ha Lee
- Korea Institute of Insect Pheromone, Hanbat National University, Daejeon, Republic of Korea
| | - Seon-Mi Seo
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
- Research Institute of Agriculture and Life Science, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
| | - Hyo-Rim Lee
- Forest Bioresources Department, National Institute of Forest Science, Jinju, Republic of Korea
| | - Min-Jung Huh
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
| | - Myunghee Jung
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
- Bioinformatics Group, Research and Development Center, Insilicogen, Inc., Yongin-si, Gyeonggi-do, Republic of Korea
| | - Il-Kwon Park
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
- Research Institute of Agriculture and Life Science, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
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Park M, Cho S, Park J, Lee H, Song W, Park IK, Kim HS. Size-dependent variation in leaf functional traits and nitrogen allocation trade-offs in Robinia pseudoacacia and Cornus controversa. Tree Physiol 2019; 39:755-766. [PMID: 30924868 DOI: 10.1093/treephys/tpy150] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 11/24/2018] [Accepted: 12/22/2018] [Indexed: 06/09/2023]
Abstract
Tree species vary in how they invest resources to different functions throughout their life histories, and investigating the detailed patterns of ontogenetic changes in key functional traits will aid in predicting forest dynamics and ecosystem processes. In this context, we investigated size-dependent changes in key leaf functional traits and nitrogen (N) allocation trade-offs in black locust (Robinia pseudoacacia L., an N-fixing pioneer species) and giant dogwood (Cornus controversa Hemsl., a mid-successional species), which have different life-history strategies, especially in their light use. We found that the leaf mass per area and leaf carbon concentrations increased linearly with tree size (diameter at breast height, DBH), whereas leaf N concentrations decreased nonlinearly, with U- and hump-shaped patterns in black locust and giant dogwood, respectively. We also discovered large differences in N allocation between the two species. The fraction of leaf N invested in cell walls was much higher in black locust than in giant dogwood, while the opposite was true for the light harvesting N fraction. Furthermore, these fractions were related to DBH to varying degrees: the cell wall N fraction increased with DBH for both species, whereas the light harvesting N fraction of giant dogwood decreased nonlinearly and that of black locust remained constant. Instead, black locust reduced the fraction of leaf N invested in other N pools, resulting in a smaller fraction compared to that of giant dogwood. On the other hand, both species had similar fraction of leaf N invested in ribulose-1,5-bisphosphate carboxylase/oxygenase across tree size. This study indicated that both species increased leaf mechanical toughness through characteristic changes in N allocation trade-offs over the lifetimes of the trees.
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Affiliation(s)
- Minjee Park
- Department of Forest Sciences, Seoul National University, Seoul, Republic of Korea
| | - Sungsik Cho
- Interdisciplinary Program in Agricultural and Forest Meteorology, Seoul National University, Seoul, Republic of Korea
- National Center for Agro Meteorology, Seoul, Republic of Korea
| | - Juhan Park
- Department of Forest Sciences, Seoul National University, Seoul, Republic of Korea
- National Center for Agro Meteorology, Seoul, Republic of Korea
| | - HoonTaek Lee
- Department of Forest Sciences, Seoul National University, Seoul, Republic of Korea
| | - Wookyung Song
- Department of Forest Sciences, Seoul National University, Seoul, Republic of Korea
| | - Il-Kwon Park
- Department of Forest Sciences, Seoul National University, Seoul, Republic of Korea
- Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
| | - Hyun Seok Kim
- Department of Forest Sciences, Seoul National University, Seoul, Republic of Korea
- Interdisciplinary Program in Agricultural and Forest Meteorology, Seoul National University, Seoul, Republic of Korea
- National Center for Agro Meteorology, Seoul, Republic of Korea
- Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
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14
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Lee SH, Ha KB, Park DH, Fang Y, Kim JH, Park MG, Woo RM, Kim WJ, Park IK, Choi JY, Je YH. Plant-derived compounds regulate formation of the insect juvenile hormone receptor complex. Pestic Biochem Physiol 2018; 150:27-32. [PMID: 30195384 DOI: 10.1016/j.pestbp.2018.06.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 06/05/2018] [Accepted: 06/16/2018] [Indexed: 06/08/2023]
Abstract
Insect growth regulators (IGRs) are attractive pest control agents due to their high target specificity and relative safety to the environment. Recently, plants have been shown to synthesize IGRs that affect the insect juvenile hormone (JH) as a part of their defense mechanisms. Using a yeast two-hybrid system transformed with the Aedes aegypti JH receptor as a reporter system, we identified several JH agonists (JHAs) and antagonists (JHANs) causing retardation in the ovarian development of female Asian tiger mosquito, Aedes albopictus, from plant essential oil compounds. While the JHAs increased the expression of a JH-induced gene, the JHANs caused a reduction in the expression of the same gene. The compounds identified in this study could provide insights into plant-insect interactions and may be useful for the development of novel IGR insecticides.
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Affiliation(s)
- Seok-Hee Lee
- Department of Agricultural Biotechnology, College of Agriculture & Life Science, Seoul National University, Seoul 08826, Republic of Korea
| | - Kyu Baik Ha
- Department of Agricultural Biotechnology, College of Agriculture & Life Science, Seoul National University, Seoul 08826, Republic of Korea
| | - Dong Hwan Park
- Department of Agricultural Biotechnology, College of Agriculture & Life Science, Seoul National University, Seoul 08826, Republic of Korea
| | - Ying Fang
- Department of Agricultural Biotechnology, College of Agriculture & Life Science, Seoul National University, Seoul 08826, Republic of Korea
| | - Jong Hoon Kim
- Department of Agricultural Biotechnology, College of Agriculture & Life Science, Seoul National University, Seoul 08826, Republic of Korea
| | - Min Gu Park
- Department of Agricultural Biotechnology, College of Agriculture & Life Science, Seoul National University, Seoul 08826, Republic of Korea
| | - Ra Mi Woo
- Department of Agricultural Biotechnology, College of Agriculture & Life Science, Seoul National University, Seoul 08826, Republic of Korea
| | - Woo Jin Kim
- Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Il-Kwon Park
- Department of Forest Science, College of Agriculture & Life Science, Seoul National University, Seoul 08826, Republic of Korea
| | - Jae Young Choi
- Department of Agricultural Biotechnology, College of Agriculture & Life Science, Seoul National University, Seoul 08826, Republic of Korea.
| | - Yeon Ho Je
- Department of Agricultural Biotechnology, College of Agriculture & Life Science, Seoul National University, Seoul 08826, Republic of Korea; Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea.
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15
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Lee HR, Lee SC, Lee DH, Jung M, Kwon JH, Huh MJ, Kim DS, Lee JE, Park IK. Identification of Aggregation-Sex Pheromone of the Korean Monochamus alternatus (Coleoptera: Cerambycidae) Population, the Main Vector of Pine Wood Nematode. J Econ Entomol 2018; 111:1768-1774. [PMID: 29788181 DOI: 10.1093/jee/toy137] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Indexed: 06/08/2023]
Abstract
We confirmed an aggregation-sex pheromone of the Korean Monochamus alternatus Hope (Coleoptera: Cerambycidae) population, which primarily transmitted the pine wood nematode in Korea. Only the M. alternatus male emitted monochamol which has been previously reported in the Chinese M. alternatus population. In field attraction testing, the monochamol+α-pinene+ethanol combination attracted more M. alternatus adult beetles than traps containing only monochamol, ethanol, or α-pinene. The bark beetle aggregation pheromone compounds of ipsenol, ipsdienol, and ipsenol+ipsdienol, did not show synergistic effects with the monochamol+α-pinene+ethanol combination. No synergistic effects were observed when each host volatile compound of 3-carene, β-caryophyllene, limonene, myrcene, and β-pinene was added to traps containing monochamol+α-pinene+ethanol. The ratio of female beetles was much higher in traps containing the monochamol+α-pinene+ethanol combination than that of the natural population. Our results indicated that pheromone and synergists could be useful for managing the M. alternatus population.
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Affiliation(s)
- Hyo-Rim Lee
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
- Research Institute of Agriculture and Life Science, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
| | - Sung-Chan Lee
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
| | - Dong Ha Lee
- Korea Institute of Insect Pheromone, Hanbat National University, Daejeon, Republic of Korea
| | - Myunghee Jung
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
- Bioinformatics Group, R&D Center, Insilicogen, Inc., Yongin-si Gyeonggi-do, Republic of Korea
| | - Jun-Hyeong Kwon
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
| | - Min-Jung Huh
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
| | - Dong-Soo Kim
- Southern Forest Resources Research Center, National Institute of Forest Science, Jinju, Gyeongnam, Republic of Korea
| | - Ji-Eun Lee
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
| | - Il-Kwon Park
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
- Research Institute of Agriculture and Life Science, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
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Hwang JY, Byun MS, Choe YM, Lee JH, Yi D, Yoon HN, Park IK, Lee YJ, Lee DY. 0249 Association Between Sleep-Wake Cycle And Brain Cortical Thickness In Young Adults. Sleep 2018. [DOI: 10.1093/sleep/zsy061.248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- J Y Hwang
- Seoul National University College of Medicine, Seoul, KOREA, REPUBLIC OF
| | - M S Byun
- Institute of Human Behavioral Medicine, Medical Research Center Seoul National University, Seoul, KOREA, REPUBLIC OF
| | - Y M Choe
- Department of Psychiatry, Ulsan University Hospital, Ulsan, KOREA, REPUBLIC OF
| | - J H Lee
- Department of Psychiatry, Seoul National University Hospital, Seoul, KOREA, REPUBLIC OF
| | - D Yi
- Institute of Human Behavioral Medicine, Medical Research Center Seoul National University, Seoul, KOREA, REPUBLIC OF
| | - H N Yoon
- Department of Biomedical Engineering, Seoul National University College of Medicine, Seoul, KOREA, REPUBLIC OF
| | - I K Park
- Center for Sleep and Chronobiology, Department of Psychiatry, Seoul National University Hospital, Seoul, KOREA, REPUBLIC OF
| | - Y J Lee
- Center for Sleep and Chronobiology, Department of Psychiatry, Seoul National University Hospital, Seoul, KOREA, REPUBLIC OF
| | - D Y Lee
- Department of Psychiatry, Seoul National University Hospital, Seoul, KOREA, REPUBLIC OF
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Yeom HJ, Lee HR, Lee SC, Lee JE, Seo SM, Park IK. Insecticidal Activity of Lamiaceae Plant Essential Oils and Their Constituents Against Blattella germanica L. Adult. J Econ Entomol 2018; 111:653-661. [PMID: 29474548 DOI: 10.1093/jee/tox378] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The insecticidal activities of 13 Lamiaceae plant oils and their components against adult German cockroaches, Blattella germanica L. (Blattodea: Blattellidae), were evaluated using fumigant and contact bioassay. Among the tested oils, basil, pennyroyal, and spearmint showed the strongest insecticidal activities against adult B. germanica. Insecticidal activity of pennyroyal was 100% against male B. germanica at 1.25 mg concentration in fumigant bioassay. Basil and spearmint revealed 100% and 100% insecticidal activity against male B. germanica at 5 mg concentration, but their activities reduced to 80% and 25% at 2.5 mg concentration, respectively. In contact, toxicity bioassay, basil, pennyroyal, and spearmint oils exhibited 100%, 100%, and 98% mortality against female B. germanica at 1 mg/♀, respectively. Among the constituents identified in basil, pennyroyal, and spearmint oils, insecticidal activity of pulegone was the strongest against male and female B. germanica.
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Affiliation(s)
- Hwa-Jeong Yeom
- Incheon International Airport Regional Office, Animal and Plant Quarantine Agency, Gonghang-ro, Jung-gu, Incheon, Republic of Korea
| | - Hyo-Rim Lee
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
- Research Institute of Agriculture and Life Science, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
| | - Sung-Chan Lee
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
| | - Ji-Eun Lee
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
| | - Seon-Mi Seo
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
- Research Institute of Agriculture and Life Science, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
| | - Il-Kwon Park
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
- Research Institute of Agriculture and Life Science, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
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Seo SM, Lee HR, Lee JE, Jeong YC, Kwon HW, Moon JK, Moloney MG, Park IK. Larvicidal and Nematicidal Activities of 3-Acylbarbituric Acid Analogues against Asian Tiger Mosquito, Aedes albopictus, and Pine Wood Nematode, Bursaphelenchus xylophilus. Molecules 2017; 22:molecules22071196. [PMID: 28714917 PMCID: PMC6151981 DOI: 10.3390/molecules22071196] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2017] [Accepted: 07/12/2017] [Indexed: 11/16/2022] Open
Abstract
Widespread concern for the occurrence of resistant strains, along with the avoidance of the use of highly toxic insecticides and their wide environmental dispersal, highlights the need for the development of new and safer pest control agents. Natural products provide inspiration for new chemical entities with biological activities, and their analogues are good lead compounds for the development of new pest control agents. For this purpose, we evaluated the larvicidal and nematicidal activities of 48 3-acylbarbituric acid analogues against the Asian tiger mosquito, Aedes albopictus and the pine wood nematode, Bursaphelenchus xylophilus, organisms of increasing global concern. Among the 48 3-acylbarbituric acid analogues, four compounds—10, 14d, 14g and 19b—showed >90% larvicidal activity against Ae. albopictus at 10 μg/mL concentration, and one (compound 10) showed the strongest larvicidal activity against Ae. albopictus, with a LC50 value of 0.22 μg/mL. Only compound 18 showed strong nematicidal activity against pine wood nematode. Most active compounds possessed similar physicochemical properties; thus, actives typically had ClogP values of around 1.40–1.50 and rel-PSA values of 16–17% and these similar cheminformatic characteristics reflect their similar structure. This study indicates that active 3-acylbarbituric acids analogues have potential as lead compounds for developing novel mosquito control agents.
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Affiliation(s)
- Seon-Mi Seo
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea.
- Research Institute of Agriculture and Life Science, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea.
| | - Hyo-Rim Lee
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea.
- Research Institute of Agriculture and Life Science, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea.
| | - Ji-Eun Lee
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea.
| | - Yong-Chul Jeong
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Rd, Oxford OS1 3TA, UK.
| | - Hyung-Wook Kwon
- Division of Life Sciences and Bio-Resource and Environmental Center, College of Life Science & Bioengineering, Incheon National University, 119 Academy-ro, Yeonsu-gu, Incheon 22012, Korea.
- Convergence Research Center for Insect Vector, College of Life Science & Bioengineering, Incheon National University, 119 Academy-ro, Yeonsu-gu, Incheon 22012, Korea.
| | - Joon-Kwan Moon
- Department of Plant Life and Environmental Sciences, hankyong National University, 327 Jungangro, Anseong, Gyeonggi 17579, Korea.
| | - Mark G Moloney
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Rd, Oxford OS1 3TA, UK.
| | - Il-Kwon Park
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea.
- Research Institute of Agriculture and Life Science, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea.
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Lee HR, Kim GH, Choi WS, Park IK. Repellent Activity of Apiaceae Plant Essential Oils and their Constituents Against Adult German Cockroaches. J Econ Entomol 2017; 110:552-557. [PMID: 28165121 DOI: 10.1093/jee/tow290] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Indexed: 06/06/2023]
Abstract
We evaluated the repellent activity of 12 Apiaceae plant essential oils and their components against male and female adult German cockroaches, Blattella germanica L., to find new natural repellents. Of all the plant essential oils tested, ajowan (Trachyspermum ammi Sprague) and dill (Anethum graveolens L.) essential oils showed the most potent repellent activity against male and female adult German cockroaches. Repellent activities of chemicals already identified in active oils were also investigated. Of the compounds identified, carvacrol, thymol, and R-(-)-carvone showed >80% repellent activity against male and female adult German cockroaches at 2.5 µg/cm2. S-(+)-Carvone, (+)-dihydrocarvone, and terpinen-4-ol showed >70% repellent activity against male and female adult German cockroaches at 10 µg/cm2. Our results indicated that Apiaceae plant essential oils and their constituents have good potential as natural repellents against adult German cockroaches.
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Affiliation(s)
- Hyo-Rim Lee
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea (; )
| | - Gil-Hah Kim
- Department of Plant Medicine, College of Agriculture, Life and Environment Sciences, Chungbuk National University, Cheongju 28644, Republic of Korea
| | - Won-Sil Choi
- Labatory of Chromatography, National Instrumentation Center for Environmental Management, Seoul National University, Seoul 08826, Republic of Korea
| | - Il-Kwon Park
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea ( ; )
- Research Institute of Agriculture and Life Science, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
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Song YR, Choi MS, Choi GW, Park IK, Oh CS. Antibacterial Activity of Cinnamaldehyde and Estragole Extracted from Plant Essential Oils against Pseudomonas syringae pv. actinidiae Causing Bacterial Canker Disease in Kiwifruit. Plant Pathol J 2016; 32:363-70. [PMID: 27493612 PMCID: PMC4968647 DOI: 10.5423/ppj.nt.01.2016.0006] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Revised: 02/24/2016] [Accepted: 03/02/2016] [Indexed: 06/06/2023]
Abstract
Pseudomonas syringae pv. actinidiae (Psa) causes bacterial canker disease in kiwifruit. Antibacterial activity of plant essential oils (PEOs) originating from 49 plant species were tested against Psa by a vapor diffusion and a liquid culture assays. The five PEOs from Pimenta racemosa, P. dioica, Melaleuca linariifolia, M. cajuputii, and Cinnamomum cassia efficiently inhibited Psa growth by either assays. Among their major components, estragole, eugenol, and methyl eugenol showed significant antibacterial activity by only the liquid culture assay, while cinnamaldehyde exhibited antibacterial activity by both assays. The minimum inhibitory concentrations (MICs) of estragole and cinnamaldehyde by the liquid culture assay were 1,250 and 2,500 ppm, respectively. The MIC of cinnamaldehyde by the vapor diffusion assay was 5,000 ppm. Based on the formation of clear zones or the decrease of optical density caused by these compounds, they might kill the bacterial cells and this feature might be useful for managing the bacterial canker disease in kiwifruit.
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Affiliation(s)
- Yu-Rim Song
- Department of Horticultural Biotechnology and Institute of Life Sciences & Resources, Kyung Hee University, Yongin 17104,
Korea
| | - Min-Seon Choi
- Department of Horticultural Biotechnology and Institute of Life Sciences & Resources, Kyung Hee University, Yongin 17104,
Korea
| | - Geun-Won Choi
- Department of Horticultural Biotechnology and Institute of Life Sciences & Resources, Kyung Hee University, Yongin 17104,
Korea
| | - Il-Kwon Park
- Department of Forest Sciences, Seoul National University, Seoul 08826,
Korea
| | - Chang-Sik Oh
- Department of Horticultural Biotechnology and Institute of Life Sciences & Resources, Kyung Hee University, Yongin 17104,
Korea
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Kim SW, Lee HR, Jang MJ, Jung CS, Park IK. Fumigant Toxicity of Lamiaceae Plant Essential Oils and Blends of Their Constituents against Adult Rice Weevil Sitophilus oryzae. Molecules 2016; 21:361. [PMID: 26999084 PMCID: PMC6273776 DOI: 10.3390/molecules21030361] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Revised: 03/07/2016] [Accepted: 03/10/2016] [Indexed: 11/16/2022] Open
Abstract
To find a new and safe alternative to conventional insecticides, we evaluated the fumigant toxicity of eight Lamiaceae essential oils and their constituents against the adult rice weevil Sitophilus oryzae. Of the eight species tested, hyssop (Hyssopus offcinalis), majoram (Origanum majorana), and Thymus zygis essential oils showed strong fumigant toxicity against S. oryzae adults at 25 mg/L air concentration. Constituents of active essential oils were analyzed by gas chromatography coupled to flame ionization detector (FID) and gas chromatography-mass spectrometry. A total of 13, 15, and 17 compounds were identified from hyssop, majoram, and Thymus zygis essential oils, respectively. Pinocamphone and isopinocamphone were isolated by open column chromatography. Among the test compounds, pinocamphone and isopinocamphone showed the strongest fumigant toxicity against S. oryzae. Sabinene hydrate, linalool, α-terpineol, and terpinen-4-ol exhibited 100% fumigant toxicity against S. oryzae at 3.9 mg/L air concentration. The measured toxicity of the artificial blends of the constituents identified in hyssop, majoram, and Thymus zygis oils indicated that isopinocamphone, terpine-4-ol, and linalool were major contributors to the fumigant toxicity of the artificial blend, respectively.
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Affiliation(s)
- Sung-Woong Kim
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea.
| | - Hyo-Rim Lee
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea.
| | - Myeong-Jin Jang
- Division of Forest Insect Pests and Diseases, Korea Forest Research Institute, Seoul 02455, Korea.
| | - Chan-Sik Jung
- Division of Forest Insect Pests and Diseases, Korea Forest Research Institute, Seoul 02455, Korea.
| | - Il-Kwon Park
- Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea.
- Research Institute of Agriculture and Life Science, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea.
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Seo SM, Jung CS, Kang J, Lee HR, Kim SW, Hyun J, Park IK. Larvicidal and acetylcholinesterase inhibitory activities of apiaceae plant essential oils and their constituents against aedes albopictus and formulation development. J Agric Food Chem 2015; 63:9977-9986. [PMID: 26500081 DOI: 10.1021/acs.jafc.5b03586] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
This study evaluated the larvicidal activity of 12 Apiaceae plant essential oils and their components against the Asian tiger mosquito, Aedes albopictus, and the inhibition of acetylcholine esterase with their components. Of the 12 plant essential oils tested, ajowan (Trachyspermum ammi), caraway seed (Carum carvi), carrot seed (Daucus carota), celery (Apium graveolens), cumin (Cuminum cyminum), dill (Anethum graveolens), and parsley (Petroselinum sativum) resulted in >90% larval mortality when used at 0.1 mg/mL. Of the compounds identified, α-phellandrene, α-terpinene, p-cymene, (-)-limonene, (+)-limonene, γ-terpinene, cuminaldehyde, neral, (S)-+-carvone, trans-anethole, thymol, carvacrol, myristicin, apiol, and carotol resulted in >80% larval mortality when used at 0.1 mg/mL. Two days after treatment, 24.69, 3.64, and 12.43% of the original amounts of the celery, cumin, and parsley oils, respectively, remained in the water. Less than 50% of the original amounts of α-phellandrene, 1,8-cineole, terpinen-4-ol, cuminaldehyde, and trans-antheole were detected in the water at 2 days after treatment. Carvacrol, α-pinene, and β-pinene inhibited the activity of Ae. albopictus acetylcholinesterase with IC50 values of 0.057, 0.062, and 0.190 mg/mL, respectively. A spherical microemulsion of parsley essential oil-loaded poly(vinyl alcohol) (PVA) was prepared, and the larvicidal activity of this formulation was shown to be similar to that of parsley oil.
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Affiliation(s)
- Seon-Mi Seo
- Lifetree Biotech Company, Ltd., Maesonggosaek-ro, Kwonsun-gu, Suwon, Gyeonggido 441-813, Republic of Korea
| | - Chan-Sik Jung
- Division of Forest Insect Pests and Diseases, Korea Forest Research Institute , Seoul 130-712, Republic of Korea
| | - Jaesoon Kang
- Gyeongnam Department of Environmental Toxicology and Chemistry, Korea Institute of Toxicology , Jin-Ju 660-844, Gyeongnam, Republic of Korea
| | | | - Sung-Woong Kim
- Division of Forest Insect Pests and Diseases, Korea Forest Research Institute , Seoul 130-712, Republic of Korea
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Kim E, Oh CS, Koh SH, Kim HS, Kang KS, Park PS, Jang MJ, Lee HR, Park IK. Antifungal activities after vaporization of ajowan (Trachyspermum ammi) and allspice (Pimenta dioica) essential oils and blends of their constituents against threeAspergillusspecies. Journal of Essential Oil Research 2015. [DOI: 10.1080/10412905.2015.1110062] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Hardstone MC, Strycharz JP, Kim J, Park IK, Yoon KS, Ahn YJ, Harrington LC, Lee SH, Clark JM. Development of multifunctional metabolic synergists to suppress the evolution of resistance against pyrethroids in insects that blood feed on humans. Pest Manag Sci 2015; 71:842-849. [PMID: 25044360 DOI: 10.1002/ps.3856] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Accepted: 07/08/2014] [Indexed: 06/03/2023]
Abstract
BACKGROUND Pyrethroids are the insecticides of choice when exposure to humans is likely, such as occurs in vector and public-health-related control programs. Unfortunately, the pyrethroids share a common resistance mechanism with dichlorodiphenyltrichloroethane (DDT), knockdown resistance (kdr), and prior extensive use of DDT has predisposed the pyrethroids to cross-resistance via kdr. Given the widespread occurrence of kdr, the use of synergists with pyrethroids is considered to be prudent to guard against the selection of multiply resistant insects. RESULTS 3-Phenoxybenzyl hexanoate (PBH) was synthesized as a multifunctional pyrethroid synergist that, besides being a surrogate substrate for sequestration/hydrolytic carboxylesterases, now also functions as a substrate for oxidative xenobiotic metabolism. The addition of PBH to permethrin-treated females of the ISOP450 strain of Culex pipiens quinquefasciatus resulted in a threefold increase in synergism, as judged by the synergistic ratio. Similarly, PBH synergized the action of deltamethrin sixfold on females of the common bed bug, Cimex lectularius, and was 2.8-fold more synergistic than piperonyl butoxide (PBO). CONCLUSIONS PBH synergized the action of both type I and type II pyrethroids in a mosquito vector (Cx. p. quinquefasciatus) and in a public-health pest, C. lectularius, respectively, indicating a broad spectrum of action on blood-feeding insects. PBH appears to have residual properties similar to permethrin and is itself non-toxic, unlike PBO, and therefore should be compatible with existing pyrethroid formulations used for insecticide-treated nets and home/residential sprays.
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Affiliation(s)
- Melissa C Hardstone
- Department of Entomology, Comstock Hall, Cornell University, Ithaca, NY, USA
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Moon M, Kang KS, Park IK, Kim T, Kim HS. Effects of leaf nitrogen allocation on the photosynthetic nitrogen-use efficiency of seedlings of three tropical species in Indonesia. ACTA ACUST UNITED AC 2015. [DOI: 10.1007/s13765-015-0074-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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26
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Yeom HJ, Jung CS, Kang J, Kim J, Lee JH, Kim DS, Kim HS, Park PS, Kang KS, Park IK. Insecticidal and acetylcholine esterase inhibition activity of Asteraceae plant essential oils and their constituents against adults of the German cockroach (Blattella germanica). J Agric Food Chem 2015; 63:2241-2248. [PMID: 25664467 DOI: 10.1021/jf505927n] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The fumigant and contact toxicities of 16 Asteraceae plant essential oils and their constituents against adult male and female Blattella germanica were examined. In a fumigant toxicity test, tarragon oil exhibited 100% and 90% fumigant toxicity against adult male German cockroaches at 5 and 2.5 mg/filter paper, respectively. Fumigant toxicities of Artemisia arborescens and santolina oils against adult male German cockroaches were 100% at 20 mg/filter paper, but were reduced to 60% and 22.5% at 10 mg/filter paper, respectively. In contact toxicity tests, tarragon and santolina oils showed potent insecticidal activity against adult male German cockroaches. Components of active oils were analyzed using gas chromatography, gas chromatography-mass spectrometry, or nuclear magnetic resonance spectrometer. Among the identified compounds from active essential oils, estragole demonstrated potent fumigant and contact toxicity against adult German cockroaches. β-Phellandrene exhibited inhibition of male and female German cockroach acetylcholinesterase activity with IC50 values of 0.30 and 0.28 mg/mL, respectively.
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Affiliation(s)
- Hwa-Jeong Yeom
- Division of Forest Insect Pests and Diseases, Korea Forest Research Institute , Seoul 130-712, Republic of Korea
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Seo SM, Kim J, Koh SH, Ahn YJ, Park IK. Nematicidal activity of natural ester compounds and their analogues against pine wood nematode, Bursaphelenchus xylophilus. J Agric Food Chem 2014; 62:9103-8. [PMID: 25153339 DOI: 10.1021/jf503631e] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
In this study, we evaluated the nematicidal activity of natural ester compounds against the pine wood nematode, Bursaphelenchus xylophilus, to identify candidates for the development of novel, safe nematicides. We also tested the nematicidal activity of synthesized analogues of these ester compounds to determine the structure-activity relationship. Among 28 ester compounds tested, isobutyl 2-methylbutanoate, 3-methylbutyl 2-methylbutanoate, 3-methylbutyl tiglate, 3-methyl-2-butenyl 2-methylbutanoate, and pentyl 2-methylbutanoate showed strong nematicidal activity against the pine wood nematode at a 1 mg/mL concentration. The other ester compounds showed weak nematicidal activity. The LC50 values of 3-methylbutyl tiglate, isobutyl 2-methylbutanoate, 3-methylbutyl 2-methylbutanoate, 3-methyl-2-butenyl 2-methylbutanoate, and pentyl 2-methylbutanoate were 0.0218, 0.0284, 0.0326, 0.0402, and 0.0480 mg/mL, respectively. The ester compounds described herein merit further study as potential nematicides for pine wood nematode control.
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Affiliation(s)
- Seon-Mi Seo
- Lifetree Biotech Co., Ltd. , Maesonggosaek-ro, Kwonsun-gu, Suwon, Gyeonggido 441-813, Republic of Korea
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Seo SM, Kim J, Kang J, Koh SH, Ahn YJ, Kang KS, Park IK. Fumigant toxicity and acetylcholinesterase inhibitory activity of 4 Asteraceae plant essential oils and their constituents against Japanese termite (Reticulitermes speratus Kolbe). Pestic Biochem Physiol 2014; 113:55-61. [PMID: 25052527 DOI: 10.1016/j.pestbp.2014.06.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Revised: 05/30/2014] [Accepted: 06/02/2014] [Indexed: 06/03/2023]
Abstract
This study investigated the fumigant toxicity of 4 Asteraceae plant essential oils and their constituents against the Japanese termite Reticulitermes speratus Kolbe. Fumigant toxicity varied with plant essential oils or constituents, exposure time, and concentration. Among the tested essential oils, those from Chamaemelum nobile exhibited the strongest fumigant toxicity, followed by those from Santolina chamaecyparissus, Ormenis multicaulis, and Eriocephalus punctulatus at 2 days after treatment. In all, 15, 24, 19, and 9 compounds were identified in the essential oils from C. nobile, E. punctulatus, O. multicaulis, and S. chamaecyparissus, respectively, by using gas chromatography, gas chromatography-mass spectrometry, or open-column chromatography. The identified compounds were tested individually for their fumigant toxicity against Japanese termites. Among the test compounds, trans-pinocarveol, caryophyllene oxide, sabinene hydrate, and santolina alcohol showed strong fumigant toxicity against Japanese termites. Acetylcholinesterase (AChE) inhibition activity of the identified compounds from C. nobile, E. punctulatus, O. multicaulis, and S. chamaecyparissus essential oils were tested to determine the mode of their action. The IC50 values of (+)-α-pinene, (-)-limonene, (-)-α-pinene, β-pinene, and β-phellandrene against Japanese termite AChE were 0.03, 0.13, 0.41, 0.42, and 0.67mg/mL, respectively. Further studies are warranted to determine the potential of these essential oils and their constituents as fumigants for termite control.
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Affiliation(s)
- Seon-Mi Seo
- Lifetree Biotech Co., Ltd., Maesonggosaek-ro, Kwonsun-gu, Suwon, Gyeonggido 441-813, Republic of Korea
| | - Junheon Kim
- Institute of Agriculture and Life Science, Gyeongsang National University, Jinju, Gyeongnamdo 660-701, Republic of Korea
| | - Jaesoon Kang
- Gyeongnam Department of Environmental Toxicology and Chemistry, Korea Institute of Toxicology, Jin-Ju, Gyeongnam, Republic of Korea
| | - Sang-Hyun Koh
- Division of Forest Insect Pests and Diseases, Korea Forest Research Institute, Seoul 130-712, Republic of Korea
| | - Young-Joon Ahn
- Department of Agricultural Biotechnology, College of Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea
| | - Kyu-Suk Kang
- Department of Forest Science, College of Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea
| | - Il-Kwon Park
- Department of Forest Science, College of Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea.
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Kang JS, Kim E, Lee SH, Park IK. Inhibition of acetylcholinesterases of the pinewood nematode, Bursaphelenchus xylophilus, by phytochemicals from plant essential oils. Pestic Biochem Physiol 2013; 105:50-56. [PMID: 24238290 DOI: 10.1016/j.pestbp.2012.11.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2012] [Revised: 11/01/2012] [Accepted: 11/19/2012] [Indexed: 06/02/2023]
Abstract
To understand the nematicidal mode of action of phytochemicals derived from plant essential oils against the pinewood nematode (Bursaphelenchus xylophilus), we evaluated 97 compounds (49 monoterpenes, 17 phenylpropenes, 16 sesquiterpenes, and 15 sulfides) for their inhibitory effects on B. xylophilus acetylcholinesterases (BxACEs). In the primary inhibition assay using B. xylophilus crude protein, more than 50% BxACE inhibition activity was observed with 3 monoterpenes, (+)-α-pinene, (-)-α-pinene, and 3-carene; 2 phenylpropenes, ο-anisaldehyde, and coniferyl alcohol; and 1 sesquiterpene, cis-nerolidol. Other compounds showed moderate or weak inhibitory activity. The inhibitory activities against 3 recombinant BxACEs were subsequently estimated using the identified active compounds in a primary inhibition assay. (+)-α-Pinene showed the strongest inhibition of BxACE-1 followed by 3-carene, coniferyl alcohol, (-)-α-pinene, o-anisaldehyde, and cis-nerolidol. The half maximal inhibitory concentration (IC50) values of (+)-α-pinene, 3-carene, o-anisaldehyde, cis-nerolidol, and (-)-α-pinene against BxACE-2 were found to be 0.64, 1.41, 8.18, 8.53, 15.28, and 18.03mM, respectively. Coniferyl alcohol showed the strongest inhibition of BxACE-3 followed by (+)-α-pinene and cis-nerolidol.
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Affiliation(s)
- Jae Soon Kang
- Division of Forest Insect Pests and Diseases, Korea Forest Research Institute, Seoul 130-712, Republic of Korea
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Kim E, Park IK. Fumigant antifungal activity of Myrtaceae essential oils and constituents from Leptospermum petersonii against three Aspergillus species. Molecules 2012; 17:10459-69. [PMID: 22945026 PMCID: PMC6268886 DOI: 10.3390/molecules170910459] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2012] [Revised: 08/16/2012] [Accepted: 08/27/2012] [Indexed: 11/30/2022] Open
Abstract
Commercial plant essential oils obtained from 11 Myrtaceae plant species were tested for their fumigant antifungal activity against Aspergillus ochraceus, A. flavus, and A. niger. Essential oils extracted from Leptospermum petersonii at air concentrations of 56 × 10(-3) mg/mL and 28 × 10(-3) mg/mL completely inhibited the growth of the three Aspergillus species. However, at an air concentration of 14 × 10(-3) mg/mL, inhibition rates of L. petersonii essential oils were reduced to 20.2% and 18.8% in the case of A. flavus and A. niger, respectively. The other Myrtaceae essential oils (56 × 10(-3) mg/mL) only weakly inhibited the fungi or had no detectable affect. Gas chromatography-mass spectrometry analysis identified 16 compounds in L. petersonii essential oil. The antifungal activity of the identified compounds was tested individually by using standard or synthesized compounds. Of these, neral and geranial inhibited growth by 100%, at an air concentration of 56 × 10(-3) mg/mL, whereas the activity of citronellol was somewhat lover (80%). The other compounds exhibited only moderate or weak antifungal activity. The antifungal activities of blends of constituents identified in L. petersonii oil indicated that neral and geranial were the major contributors to the fumigant and antifungal activities.
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Affiliation(s)
- Eunae Kim
- Division of Forest Insect Pests and Diseases, Korea Forest Research Institute, Seoul 130-712, Korea.
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31
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Lee HJ, Nguyen YTC, Muthiah M, Vu-Quang H, Namgung R, Kim WJ, Yu MK, Jon S, Lee IK, Jeong YY, Park IK. MR traceable delivery of p53 tumor suppressor gene by PEI-functionalized superparamagnetic iron oxide nanoparticles. J Biomed Nanotechnol 2012; 8:361-71. [PMID: 22764405 DOI: 10.1166/jbn.2012.1407] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Cancer gene therapy involves the replacement of missing or altered genes with healthy ones. In this paper, we have proposed tumor suppressor gene-carrying superparamagnetic iron oxide nanoparticles (SPIONs) for anti-cancer gene therapy. Thermally crosslinked SPIONs (TCL-SPIONs) were conjugated with branched polyethylenimine (PEI 1800 Da) by EDC-NHS chemistry for p53 plasmid DNA delivery. The morphology of the bPEI conjugated TCL-SPIONs (bPEI-TCL-SPION) and pDNA-loaded bPEI-TCL-SPION nanoparticles was measured using transmission electron microscopy (TEM). The particle sizes of the pDNA-loaded bPEI-TCL-SPION nanoparticles were also confirmed by dynamic light scattering, and ranged from 100 to 130 nm, depending on the molar charge ratio. The fluorescently labeled pDNA was complexed with bPEI-TCL-SPION and its intracellular internalization was investigated using confocal microscopy. The p53 plasmid-loaded bPEI-TCL-SPION nanoparticles achieved significantly higher p53 tumor suppressor gene expression and cellular viability compared to positive controls. The expressed wild-type p53 protein suppressed tumor cell proliferation as compared to the mutant control. When transgene expression of the p53 tumor suppressor gene was evaluated at the mRNA level and quantified using real-time PCR, the results were highly dependent on the molar charge ratio (N/P) as well as the cancer cell type. SPIONs internalized within cancer cells were tracked by magnetic resonance (MR) imaging. It was concluded that bPEI-TCL-SPION could be used as efficient gene delivery carriers that can be tracked by MR imaging.
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Affiliation(s)
- H J Lee
- Department of Biomedical Sciences, Research Institute of Medical Sciences, Chonnam National University Medical School, Gwangju 501-746, South Korea
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Yeom HJ, Kang JS, Kim GH, Park IK. Insecticidal and acetylcholine esterase inhibition activity of Apiaceae plant essential oils and their constituents against adults of German cockroach (Blattella germanica). J Agric Food Chem 2012; 60:7194-203. [PMID: 22746406 DOI: 10.1021/jf302009w] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We evaluated the insecticidal and acetylcholine esterase (AChE) inhibition activity of 11 Apiaceae plant essential oils and their constituents in adult male and female Blattella germanica. Of the 11 Apiaceae plant essential oils tested, dill (Anethum graveolens), carvi (Carum carvi), and cumin (Cuminum cyminum) demonstrated >90% fumigant toxicity against adult male German cockroaches at a concentration of 5 mg/filter paper. In a contact toxicity test, dill (Anethum graveolens), carvi (Carum carvi), cumin (Cuminum cyminum), and ajowan (Trachyspermum ammi) produced strong insecticidal activity against adult male and female German cockroaches. Among the test compounds, (S)-(+)-carvone, 1,8-cineole, trans-dihydrocarvone, cuminaldehyde, trans-anethole, p-cymene, and γ-terpinene demonstrated strong fumigant toxicity against adult male and female B. germanica. In a contact toxicity test, carveol, cuminaldehyde, (S)-(+)-carvone, trans-anethole, thymol, and p-cymene showed strong contact toxicity against adult male and female B. germanica. IC(50) values of α-pinene, carvacrol, and dihydrocarvone against female AChE were 0.28, 0.17, and 0.78 mg/mL, respectively. The toxicity of the blends of constituents identified in 4 active oils indicated that carvone, cuminaldehyde, and thymol were major contributors to the fumigant activity or contact toxicity of the artificial blend.
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Affiliation(s)
- Hwa-Jeong Yeom
- Division of Forest Insect Pests and Diseases, Korea Forest Research Institute, Seoul 130-712, Republic of Korea
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Seo SM, Park HM, Park IK. Larvicidal activity of ajowan ( Trachyspermum ammi ) and Peru balsam ( Myroxylon pereira ) oils and blends of their constituents against mosquito, Aedes aegypti , acute toxicity on water flea, Daphnia magna , and aqueous residue. J Agric Food Chem 2012; 60:5909-5914. [PMID: 22620984 DOI: 10.1021/jf301296d] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
This study evaluated the larvicidal activity of 20 plant essential oils and components from ajowan ( Trachyspermum ammi ) and Peru balsam ( Myroxylon pereira ) oils against the mosquito, Aedes aegypti . Of the 20 plant essential oils, ajowan and Peru balsam oils at 0.1 mg/mL exhibited 100 and 97.5% larval mortality, respectively. At this same concentration, the individual constituents, (+)-camphene, benzoic acid, thymol, carvacrol, benzyl benzonate, and benzyl trans-cinnamate, caused 100% mortality. The toxicity of blends of constituents identified in two active oils indicated that thymol and benzyl benzoate were major contributors to the larvicidal activity of the artificial blend. This study also tested the acute toxicity of these two active oils and their major constituents against the water flea, Daphnia magna . Peru balsam oil and benzyl trans-cinnamate were the most toxic to D. magna. Two days after the treatment, residues of ajowan and Peru balsalm oils in water were 36.2 and 85.1%, respectively. Less than 50% of benzyl trans-cinnamate and thymol were detected in the water at 2 days after treatment. The results show that the essential oils of ajowan and Peru balsam and some of their constituents have potential as botanical insecticides against Ae. aegypti mosquito larvae.
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Affiliation(s)
- Seon-Mi Seo
- Division of Forest Insect Pests and Diseases, Korea Forest Research Institute , Seoul 130-712, Republic of Korea
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Park IK. Larvicidal Activity of Constituents Identified in Piper nigrum L. Fruit Against the Diamondback moth, Plutella xylostella. ACTA ACUST UNITED AC 2012. [DOI: 10.5656/ksae.2012.02.0.02] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Seo SM, Park IK. Larvicidal activity of medicinal plant extracts and lignan identified in Phryma leptostachya var. asiatica roots against housefly (Musca domestica L.). Parasitol Res 2011; 110:1849-53. [PMID: 22065063 DOI: 10.1007/s00436-011-2709-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2011] [Accepted: 10/21/2011] [Indexed: 11/30/2022]
Abstract
Medicinal plant extracts from 27 plant species in 20 families were tested for their larvicidal activity against housefly, Musca domestica (L.). Responses varied with plant material and concentration. Among plant species tested, Phryma leptostachya var. asiatica showed 100% larvicidal activity against M. domestica at 10 mg/g concentration. Larvicidal activities of Atractylodes japonica, Saussurea lappa, Asiasarum sieboldi, and Gleditsia japonica var. koraiensis were 89.3%, 85.3%, 93.3%, and 96.6% at 10 mg/g concentration, respectively. Extracts of Prunus persica, Curcuma longa, and Paeonia moutan produced moderate activity. Larvicidal activity of other plant extracts was less than 50%. Among test plant species, P. leptostachya var. asiatica showed the most potent larvicidal activity. The active constituent of P. leptostachya var. asiatica roots was identified as the leptostachyol acetate by spectroscopic analysis. The LC(50) values of leptostachyol acetate against M. domestica larvae were 0.039 mg/g. Naturally occurring medicinal plant extracts and P. leptostachya var. asiatica root-derived compounds merit further study as potential housefly larval control agents or lead compounds.
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Affiliation(s)
- Seon-Mi Seo
- Division of Forest Insect Pests and Diseases, Korea Forest Research Institute, Seoul, 130-712, Republic of Korea
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Park IK. Insecticidal activity of isobutylamides derived from Piper nigrum against adult of two mosquito species, Culex pipiens pallens and Aedes aegypti. Nat Prod Res 2011; 26:2129-31. [PMID: 22010905 DOI: 10.1080/14786419.2011.628178] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
The insecticidal activity of Piper nigrum fruit-derived piperidine alkaloid (piperine) and N-isobutylamide alkaloids (pellitorine, guineensine, pipercide and retrofractamide A) against female adults of Culex pipiens pallens and Aedes aegypti was examined. On the basis of 24-h LD(50) values, the compound most toxic to female C. pipiens pallens was pellitorine (0.4 µg/♀) followed by guineensine (1.9 µg/♀), retrofractamide A (2.4 µg/♀) and pipercide (3.2 µg/♀). LD(50) value of chlorpyrifos was 0.03 µg/♀. Against female A. aegypti, the insecticidal activity was more pronounced in pellitorine (0.17 µg/♀) than in retrofractamide A (1.5 µg/♀), guineensine (1.7 µg/♀), and pipercide (2.0 µg/♀). LD(50) value of chlorpyrifos was 0.0014 µg/♀.
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Affiliation(s)
- Il-Kwon Park
- Division of Forest Insect Pests and Diseases, Korea Forest Research Institute, Republic of Korea.
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Haam SJ, Lee JG, Kim DJ, Chung KY, Park IK. Oesophagography and oesophagoscopy are not necessary in patients with spontaneous pneumomediastinum. Emerg Med J 2011; 27:29-31. [PMID: 20029003 DOI: 10.1136/emj.2008.065565] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND Because the condition is rare, the proper assessment of spontaneous pneumomediastinum (SPM) remains controversial. The purpose of this study was to determine whether additional oesophageal investigations beyond chest x ray and chest computed tomography (CT) scan are necessary for the diagnosis of SPM. METHODS The medical records of 25 patients diagnosed and treated for SPM from March 1986 to December 2007 were retrospectively reviewed. RESULTS There were 22 men and 3 women, with a median age of 19 years (range 15-57 years). All patients received chest x rays, which revealed air shadows within the mediastinum or subcutaneous emphysema in 24 patients. Twenty-two patients underwent chest CT scans, which showed pneumomediastinum in all cases. Oesophagography was performed in 14 patients and oesophagoscopy in three. All oesophagographies and oesophagoscopies were clear. Despite conservative treatment, no patients developed mediastinitis or complications associated with oesophageal injury. CONCLUSIONS Chest x ray and CT scan are sufficient to diagnose SPM. Additional diagnostic assessments such as oesophagography and oesophagoscopy are not necessary in patients without evidence of mediastinitis or a history of oesophageal injury.
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Affiliation(s)
- S J Haam
- 134 Sinchon-dong, Seodaemun-gu, CPO Box 8044, Seoul 120-752, South Korea;
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Park HM, Kim J, Chang KS, Kim BS, Yang YJ, Kim GH, Shin SC, Park IK. Larvicidal activity of Myrtaceae essential oils and their components against Aedes aegypti, acute toxicity on Daphnia magna, and aqueous residue. J Med Entomol 2011; 48:405-410. [PMID: 21485381 DOI: 10.1603/me10108] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The larvicidal activity of 11 Myrtaceae essential oils and their constituents was evaluated against Aedes aegypti L. Of the 11, Melaleuca linariifolia Sm., Melaleuca dissitiflora F. Muell., Melaleuca quinquenervia (Cav.) S. T. Blake, and Eucalyptus globulus Labill oils at 0.1 mg/ml exhibited > or = 80% larval mortality. At this same concentration, the individual constituents tested, allyl isothiocyanate, alpha-terpinene, p-cymene, (+)-limonene, (-)-limonene, gamma-terpinene, and (E)-nerolidol, resulted in > or = 95% mortality. We also tested the acute toxicity of these four active oils earlier mentioned and their constituents against Daphnia magna Straus. M. linariifolia and allyl isothiocyanate was the most toxic to D. magna. Twodays after treatment, residues of M. dissitiflora, M. linariifolia, M. quinquenervia, and E. globulus oils in water were 55.4, 46.6, 32.4, and 14.8%, respectively. Less than 10% of allyl isothiocyanate, alpha-terpinene, p-cymene, (-)-limonene, (+)-limonene, and gamma-terpinene was detected in the water at 2 d after treatment. Our results indicated that oils and their constituents could easily volatilize in water within a few days after application, thus minimizing their effect on the aqueous ecosystem. Therefore, Myrtaceae essential oils and their constituents could be developed as control agents against mosquito larvae.
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Affiliation(s)
- Hye-Mi Park
- Division of Forest Insect Pests and Diseases, Korea Forest Research Institute, Seoul 130-712, Republic of Korea
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Park IK, Seo SM, Kim J. Nematicidal activity of plant essential oils and components from Gaultheria fragrantissima and Zanthoxylum alatum against the pine wood nematode, Bursaphelenchus xylophilus. NEMATOLOGY 2011. [DOI: 10.1163/138855410x504907] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
AbstractCommercial essential oils from 29 plant species were tested for their nematicidal activity against the pine wood nematode, Bursaphelenchus xylophilus. Good nematicidal activity against B. xylophilus was achieved with essential oils of Gaultheria fragrantissima and Zanthoxylum alatum. GC-MS analysis of the corresponding oils led to the identification of two and ten major compounds, respectively. Four compounds, methyl salicylate, ethyl salicylate, methyl trans-cinnamate and ethyl trans-cinnamate, were tested individually for their nematicidal activities against the pine wood nematode. Methyl and ethyl salicylates showed strong nematicidal activity at concentration of 2.0 mg ml–1. Concentrations of 1.0 mg ml–1, as well as lower concentrations showed only minor effects. Another compound, methyl trans-cinnamate, showed 100% activity at concentrations of 0.0625-2.0 mg ml–1. With ethyl trans-cinnamate, 100% mortality was observed at concentrations of 0.25-2.0 mg ml–1. The essential oils and their components described herein merit further study as potential nematicides against the pine wood nematode.
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Affiliation(s)
- Il-Kwon Park
- 1Division of Forest Insect Pests and Diseases, Korea Forest Research Institute, Seoul 130-712, South Korea;,
| | - Seon-Mi Seo
- 2Division of Forest Insect Pests and Diseases, Korea Forest Research Institute, Seoul 130-712, South Korea
| | - Junheon Kim
- 3Division of Forest Insect Pests and Diseases, Korea Forest Research Institute, Seoul 130-712, South Korea
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Park IK, Kim E, Kim J. Nematicidal activity of Korean domestic plant extracts against the pine wood nematode, Bursaphelenchus xylophilus. NEMATOLOGY 2011. [DOI: 10.1163/138855410x543517] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Seo SM, Kim J, Kim E, Park HM, Kim YJ, Park IK. Structure-activity relationship of aliphatic compounds for nematicidal activity against pine wood nematode (Bursaphelenchus xylophilus). J Agric Food Chem 2010; 58:1823-7. [PMID: 20055406 DOI: 10.1021/jf902575f] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Nematicidal activity of aliphatic compounds was tested to determine a structure-activity relationship. There was a significant difference in nematicidal activity among functional groups. In a test with alkanols and 2E-alkenols, compounds with C(8)-C(11) chain length showed 100% nematicidal activity against pine wood nematode, Bursaphelenchus xylophilus , at 0.5 mg/mL concentration. C(6)-C(10) 2E-alkenals exhibited >95% nematicidal activity, but the other compounds with C(11)-C(14) chain length showed weak activity. Nematicidal activity of alkyl acetates with C(7)-C(11) chain length was strong. Compounds belonging to hydrocarbons, alkanals, and alkanoic acetates showed weak activity at 0.5 mg/mL concentration. Nematicidal activity of active compounds was determined at lower concentrations. At 0.25 mg/mL concentration, whole compounds except C(8) alkanol, C(8) 2E-alkenol, and C(7) alkanoic acid showed >80% nematicidal activity. C(9)-C(11) alkanols, C(10)-C(11) 2E-alkenols, C(8)-C(9) 2E-alkenals, and C(9)-C(10) alkanoic acids showed >80% nematicidal activity at 0.125 mg/mL concentration. Only C(11) alkanol exhibited strong nematicidal activity at 0.0625 mg/mL concentration, the lowest concentration that was tested.
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Affiliation(s)
- Seon-Mi Seo
- Division of Forest Insect Pests and Diseases, Korea Forest Research Institute, Seoul, Republic of Korea
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Park IK, Sir JJ, Jung HJ, Jo SY, Cho WH, Choi SK. Atypical takotsubo cardiomyopathy associated with nasal packing for paranasal sinus surgery. ACTA ACUST UNITED AC 2009; 11:186-8. [PMID: 20042420 DOI: 10.1093/ejechocard/jep174] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Takotsubo cardiomyopathy (TC) is characterized by reversible left ventricular (LV) apical ballooning and no significant coronary artery stenosis. New variants of TC with localized wall motion abnormality or inversed pattern with hyperdynamic apex have been reported. We present the case of a 24-year-old female with atypical presentation of TC occurring in the setting of paranasal sinus surgery under local anaesthesia with post-surgical nasal packing. She did not demonstrate ST-segment elevation on electrocardiogram, but transient moderate LV systolic dysfunction and localized wall motion abnormality affecting basal to mid-ventricular anterior and anteroseptal wall. She rapidly and completely recovered without sequelae.
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Affiliation(s)
- Il-Kwon Park
- Department of Internal Medicine, Cardiovascular Center, Inje University Seoul Paik Hospital, Inje University College of Medicine, 85 Jeo-Dong 2-ga, Jung-Gu, Seoul, Republic of Korea
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Park JD, Shin SC, Kim CS, Jeon MJ, Park IK. Biological Characteristic of Obolodiplosis robiniae and Control Effects of Some Insecticides. ACTA ACUST UNITED AC 2009. [DOI: 10.5656/ksae.2009.48.3.327] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Matsumoto Y, Park IK, Kohyama K. Matrix Metalloproteinase (MMP)-9, but Not MMP-2, Is Involved in the Development and Progression of C Protein-Induced Myocarditis and Subsequent Dilated Cardiomyopathy. J Immunol 2009; 183:4773-81. [DOI: 10.4049/jimmunol.0900871] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Seo SM, Kim J, Lee SG, Shin CH, Shin SC, Park IK. Fumigant antitermitic activity of plant essential oils and components from Ajowan ( Trachyspermum ammi ), Allspice ( Pimenta dioica ), caraway ( Carum carvi ), dill ( Anethum graveolens ), Geranium ( Pelargonium graveolens ), and Litsea ( Litsea cubeba ) oils against Japanese termite ( Reticulitermes speratus Kolbe). J Agric Food Chem 2009; 57:6596-6602. [PMID: 19722567 DOI: 10.1021/jf9015416] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Plant essential oils from 26 plant species were tested for their insecticidal activities against the Japanese termite, Reticulitermes speratus Kolbe, using a fumigation bioassay. Responses varied with source, exposure time, and concentration. Among the essential oils tested, strong insecticidal activity was observed with the essential oils of ajowan ( Trachyspermum ammi ), allspice ( Pimenta dioica ), caraway ( Carum carvi ), dill ( Anethum graveolens ), geranium ( Pelargonium graveolens ), and litsea ( Litsea cubeba ). The composition of six essential oils was identified by using gas chromatography-mass spectrometry. The compounds thus identified were tested individually for their insecticidal activities against Japanese termites. Responses varied in a dose-dependent manner for each compound. Phenol compounds exhibited the strongest insecticidal activity among the test compounds; furthermore, alcohol and aldehyde groups were more toxic than hydrocarbons. The essential oils and compounds described herein merit further study as potential fumigants for termite control.
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Affiliation(s)
- Seon-Mi Seo
- Division of Forest Insect Pests and Diseases, Korea Forest Research Institute, Seoul 130-712, Republic of Korea
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Hiraki K, Park IK, Kohyama K, Matsumoto Y. Characterization of CD8-positive macrophages infiltrating the central nervous system of rats with chronic autoimmune encephalomyelitis. J Neurosci Res 2009; 87:1175-84. [PMID: 18951531 DOI: 10.1002/jnr.21924] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
CD8+ macrophages appear in the central nervous system (CNS) under various pathological conditions such as trauma and ischemia. Furthermore, macrophages expressing CD8 were found in CNS lesions of chronic, but not acute, experimental autoimmune encephalomyelitis (EAE). To further characterize cells with this phenotype, we examined CD8+ macrophages/monocytes in the CNS and peripheral organs during the course of acute and chronic EAE that had been induced by immunization of rats with myelin basic protein and myelin oligodendrocyte glycoprotein, respectively. Counting CD8+ macrophages in CNS lesions revealed that their numbers increased reaching about 60% of total infiltrating macrophages in chronic EAE, while CD8+ macrophages remained less than 5% throughout the course of acute EAE. Unexpectedly, however, higher abundance of CD8+ monocytes/macrophages in the peripheral blood was found in both acute and chronic EAE. Real-time polymerase chain reaction analysis revealed no significant difference in the levels of chemokines and chemokine receptors of blood CD8+ monocytes between acute and chronic EAE. mRNA expression of perforin, a cytotoxic substance, was up-regulated in CD8+ monocytes compared with that of CD8- monocytes in both acute and chronic EAE. These findings suggest that activated CD8+ macrophages may play a cytotoxic role in chronic EAE lesions and that cells other than CD8+ monocytes/macrophages determined the difference in CNS pathology between acute and chronic EAE. Analysis of CD8+ monocytes/macrophages may provide useful information to permit further dissect the pathomechanisms of multiple sclerosis and to develop effective immunotherapies against autoimmune diseases in the CNS.
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Affiliation(s)
- Keiko Hiraki
- Department of Molecular Neuropathology, Tokyo Metropolitan Institute for Neuroscience, Tokyo, Japan
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Park JID, Kim MY, Lee SG, Shin SC, Kim JH, Park IK. Biological Characteristics of Lycorma delicatula and the Control Effects of Some Insecticides. ACTA ACUST UNITED AC 2009. [DOI: 10.5656/ksae.2009.48.1.053] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Abstract
The ambrosia beetle, Platypus koryoensis , is a vector of Korean oak wilt disease, which causes massive mortality of oak trees (mainly Quercus mongolica ) in Korea. So that a semiochemical-based control method could be developed, its aggregation pheromone was investigated. Whole body extract and body part extracts of male and female P. koryoensis were analysized using gas chromatography-flame ionization detector (GC-FID) and gas chromatography-mass spectrometry (GC-MS). All samples of male extracts contained nerol, neral, geraniol, and geranial. Those compounds were detected from female whole body extract as minor constituents and not detected from any female body part extracts. In addition to those compounds, citronellol was detected from the extract of boring dust produced by an unmated male. However, none of the five compounds were detected from the extract of boring dust produced by mated males and females or in artificial sawdust obtained from a beetle-infected Q. mongolica log. Male and female antennae of P. koryoensis responded to all five compounds in an electroantennography test. The blend of five components was tested in the field and attractive for male and female P. koryoensis. This result suggested that the blend of citronellol, nerol, neral, geraniol, and geranial served as an aggregation pheromone to P. koryoensis.
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Affiliation(s)
- Junheon Kim
- Division of Forest Insect Pests and Diseases, Korea Forest Research Institute, Seoul 130-712, Republic of Korea
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Abstract
Cor triatriatum is a rare congenital cardiac malformation characterized by a fibromuscular membrane that divides the left atrium into two distinct chambers. In almost all cases, it is diagnosed in childhood, whereas adult cases are extremely rare. Herein, we describe an unusual case of cor triatriatum in a 55-year-old woman who presented with embolic cerebral infarction. The patient experienced sudden-onset, transient left-sided homonymous hemianopsia and echocardiography and multidetector computed tomography detected a membrane-like structure across the left atrium, confirming the diagnosis of a cor triatriatum. The laboratory examination for hypercoagulopathy was negative. She was conservatively treated with anticoagulation and her neurological manifestation gradually improved.
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Affiliation(s)
- Kyung-Jun Park
- Department of Internal Medicine, Inje University Seoul Paik Hospital, Inje University, Seoul, Republic of Korea
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Matsumoto Y, Park IK, Hiraki K, Ohtani S, Kohyama K. Role of pathogenic T cells and autoantibodies in relapse and progression of myelin oligodendrocyte glycoprotein-induced autoimmune encephalomyelitis in LEW.1AV1 rats. Immunology 2008; 128:e250-61. [PMID: 19175799 DOI: 10.1111/j.1365-2567.2008.02955.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Accumulating evidence suggests that T cells and autoantibodies reactive with myelin oligodendrocyte glycoprotein (MOG) play a critical role in the pathogenesis of multiple sclerosis (MS). In the present study, we have tried to elucidate the pathomechanisms of development and progression of the disease by analysing T cells and autoantibodies in MOG-induced rat experimental autoimmune encephalomyelitis (EAE), which exhibits various clinical subtypes mimicking MS. Analysis using overlapping peptides revealed that encephalitogenic epitopes resided in peptide 7 (P7, residue 91-108) and P8 (residue 103-125) of MOG. Immunization with MOGP7 and MOGP8 induced relapsing-remitting or secondary progressive EAE. T cells taken from MOG-immunized and MOGP7-immunized rats responded to MOG and MOGP7 and sera from MOG-immunized rats reacted to MOG and MOGP1. Significant epitope spreading was not observed at either T-cell or antibody levels. Interestingly, sera from MOGP7-immunized rats with clinical signs did not react to MOG and MOG peptides throughout the observation period, suggesting that disease development and relapse in MOGP7-induced EAE occur without autoantibodies. However, MOGP7 immunization with adoptive transfer of anti-MOG antibodies aggravated the clinical course of EAE only slightly. Analysis of antibodies against conformational epitope (cme) suggests that anti-MOG(cme) may play a role in the pathogenicity of anti-MOG antibodies. Collectively, these findings demonstrated that relapse of a certain type of MOG-induced EAE occurs without autoantibodies but that autoantibodies may play a role in disease progression. Relapses and the progression of MS-mimicking EAE are differently immunoregulated so immunotherapy should be designed appropriately on the basis of precise information.
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Affiliation(s)
- Yoh Matsumoto
- Department of Molecular Neuropathology, Tokyo Metropolitan Institute for Neuroscience, Tokyo, Japan.
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