1
|
Kim UJ, Kim CM, Jang SJ, Lee SB, Cho SS, Jeong SH, Ko YJ, Kang SH, Park G, Kim DM, Yoon NR, Ahn YJ, Lim DH, Kook JK. Evaluation of Synergistic Effect of Combined Treatment with Linalool and Colistin on Multidrug-Resistant Acinetobacter baumannii to Expand Candidate for Therapeutic Option. Ann Clin Microbiol 2020. [DOI: 10.5145/acm.2020.23.1.11] [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: 11/05/2022] Open
Affiliation(s)
- Ung-Jun Kim
- Department of Laboratory Medicine, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Choon-Mee Kim
- Premedical Science, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Sook-Jin Jang
- Department of Laboratory Medicine, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Seul-Bi Lee
- Department of Laboratory Medicine, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Seong-Sik Cho
- Department of Laboratory Medicine, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Seok-Hoon Jeong
- Department of Laboratory Medicine and Research Institute of Antimicrobial Resistance, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Young-Jin Ko
- Department of Laboratory Medicine, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Seong-Ho Kang
- Department of Laboratory Medicine, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Geon Park
- Department of Laboratory Medicine, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Dong-Min Kim
- Department of Internal Medicine, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Na-Ra Yoon
- Department of Internal Medicine, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Young-Joon Ahn
- Department of Medical Education, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Dong-hoon Lim
- Department of Urology, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Joong-Ki Kook
- Korean Collection for Oral Microbiology and Department of Oral Biochemistry, College of Dentistry, Chosun University, Gwang-Ju, Republic of Korea
| |
Collapse
|
2
|
Jeon JH, Han M, Chang HE, Park SS, Lee JW, Ahn YJ, Hong DJ. Incidence and seasonality of respiratory viruses causing acute respiratory infections in the Northern United Arab Emirates. J Med Virol 2019; 91:1378-1384. [PMID: 30900750 PMCID: PMC7166826 DOI: 10.1002/jmv.25464] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 10/16/2018] [Accepted: 10/25/2018] [Indexed: 01/29/2023]
Abstract
Background The data on the seasonality of respiratory viruses helps to ensure the optimal vaccination period and to monitor the possible outbreaks of variant type. Objectives This study was designed to describe the molecular epidemiology and seasonality of acute respiratory infection (ARI)‐related respiratory viruses in the United Arab Emirates (UAE). Methods Both upper and lower respiratory specimens were collected for the analysis from all the patients who visited the Sheikh Khalifa Specialty Hospital (SKSH) with ARI for over 2 years. The multiplex real‐time reverse transcription polymerase chain reaction (rRT‐PCR) test was used to detect respiratory viruses, which include human adenovirus, influenza virus (FLU) A and B, respiratory syncytial virus, parainfluenza viruses, human rhinovirus (HRV), human metapneumovirus, human enterovirus, human coronavirus, and human bocavirus. Results A total of 1,362 respiratory samples were collected from 733 (53.8%) male and 629 (46.2%) female patients with ARI who visited the SKSH between November 2015 and February 2018. The rRT‐PCR test revealed an overall positivity rate of 37.2% (507/1362). The positive rate increased during winter; it was highest in December and lowest in September. FLU was the most frequently detected virus (273/1362 [20.0%]), followed by human rhinovirus (146/1362 [10.7%]). The FLU positivity rate showed two peaks, which occurred in August and December. The peak‐to‐low ratio for FLU was 2.26 (95% confidence interval: 1.52‐3.35). Conclusions The pattern of FLU in the UAE parallels to that of temperate countries. The trend of the small peak of FLU in the summer suggests a possibility of semi‐seasonal pattern in the UAE.
Collapse
Affiliation(s)
- Jae-Hyun Jeon
- Department of Infectious Disease, Sheikh Khalifa Specialty Hospital, Ras Al Khaimah, UAE.,Department of Infectious Disease, Division of Internal Medicine, Veterans Health System Medical Center, Seoul, Republic of Korea
| | - Minje Han
- Department of Laboratory Medicine, Sheikh Khalifa Specialty Hospital, Ras Al Khaimah, UAE.,Department of Laboratory Medicine, Seoul National University Hospital, Seoul, Republic of Korea
| | - Ho-Eun Chang
- Department of Laboratory Medicine, Sheikh Khalifa Specialty Hospital, Ras Al Khaimah, UAE.,Department of Laboratory Medicine, Seoul National University Bundang Hospital, Kyunggi-do, Republic of Korea
| | - Sung-Soo Park
- Division of Intensive Care Medicine, Sheikh Khalifa Specialty Hospital, Ras Al Khaimah, UAE.,Division of Intensive Care Medicine, Seoul National University Hospital, Seoul, Republic of Korea
| | - Jae-Woong Lee
- Division of Intensive Care Medicine, Sheikh Khalifa Specialty Hospital, Ras Al Khaimah, UAE.,Division of Intensive Care Medicine, Seoul National University Hospital, Seoul, Republic of Korea
| | - Young-Joon Ahn
- Division of Intensive Care Medicine, Sheikh Khalifa Specialty Hospital, Ras Al Khaimah, UAE.,Division of Intensive Care Medicine, Seoul National University Hospital, Seoul, Republic of Korea
| | - Duck-Jin Hong
- Department of Laboratory Medicine, Sheikh Khalifa Specialty Hospital, Ras Al Khaimah, UAE.,Department of Laboratory Medicine, Seoul National University Hospital, Seoul, Republic of Korea
| |
Collapse
|
3
|
Wang Z, Perumalsamy H, Wang X, Ahn YJ. Toxicity and possible mechanisms of action of honokiol from Magnolia denudata seeds against four mosquito species. Sci Rep 2019; 9:411. [PMID: 30674912 PMCID: PMC6344527 DOI: 10.1038/s41598-018-36558-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Accepted: 11/22/2018] [Indexed: 12/18/2022] Open
Abstract
This study was performed to determine the toxicity and possible mechanism of the larvicidal action of honokiol, extracted from Magnolia denudata seeds, and its 10 related compounds against third-instar larvae of insecticide-susceptible Culex pipiens pallens, Aedes aegypti, and Aedes albopictus and Anopheles sinensis resistant to deltamethrin and temephos. Honokiol (LC50, 6.13–7.37 mg/L) was highly effective against larvae of all of the four mosquito species, although the toxicity of the compound was lower than that of the synthetic larvicide temephos. Structure–activity relationship analyses indicated that electron donor and/or bulky groups at the ortho or para positions of the phenol were required for toxicity. Honokiol moderately inhibited acetylcholinesterase and caused a considerable increase in cyclic AMP levels, indicating that it might act on both acetylcholinesterase and octopaminergic receptors. Microscopy analysis clearly indicated that honokiol was mainly targeted to the midgut epithelium and anal gills, resulting in variably dramatic degenerative responses of the midgut through sequential epithelial disorganization. Honokiol did not affect the AeCS1 mRNA expression level in Ae. aegypti larvae, but did enhance expression of the genes encoding vacuolar-type H+-ATPase and aquaporin 4, indicating that it may disturb the Na+, Cl− and K+ co-transport systems. These results demonstrate that honokiol merits further study as a potential larvicide, with a specific target site, and as a lead molecule for the control of mosquito populations.
Collapse
Affiliation(s)
- Zhangqian Wang
- Department of Agricultural Biotechnology, Seoul National University, Seoul, 08826, Republic of Korea.,Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Wuhan University), Ministry of Education, and Wuhan University School of Pharmaceutical Sciences, Wuhan, 430071, Hubei, China
| | - Haribalan Perumalsamy
- Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea
| | - Xue Wang
- School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, 325035, Zhejiang, China
| | - Young-Joon Ahn
- Department of Agricultural Biotechnology, Seoul National University, Seoul, 08826, Republic of Korea. .,Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea.
| |
Collapse
|
4
|
Hong TK, Perumalsamy H, Jang KH, Na ES, Ahn YJ. Ovicidal and larvicidal activity and possible mode of action of phenylpropanoids and ketone identified in Syzygium aromaticum bud against Bradysia procera. Pestic Biochem Physiol 2018; 145:29-38. [PMID: 29482729 DOI: 10.1016/j.pestbp.2018.01.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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: 10/30/2017] [Revised: 12/18/2017] [Accepted: 01/10/2018] [Indexed: 05/06/2023]
Abstract
Bradysia procera is a serious insect pest of Panax ginseng plants. This study was conducted to determine the toxicity and mechanism of action of three phenylpropanoids, three terpenoids, and a ketone from Syzygium aromaticum bud methanol extract and hydrodistillate against third-instar larvae and eggs of B. procera. In a filter-paper mortality bioassay, methyl salicylate (LC50, 5.26μg/cm2) was the most toxic compound, followed by 2-nonanone, eugenol, and eugenyl acetate (8.77-15.40μg/cm2). These compounds were significantly less toxic than either thiamethoxam, clothianidin, or cypermethrin. Egg hatching was inhibited by 97, 85, and 40% at 11.7μg/cm2 of methyl salicylate, 2-nonanone, and eugenol, respectively. The egg-hatching inhibition of these insecticides was between 90 and 94% at 0.09μg/cm2. These constituents were consistently more toxic in closed versus open containers, indicating that toxicity was achieved mainly through the action of vapor. The mechanism of larvicidal action of methyl salicylate, eugenol, and eugenyl acetate might be primarily due to interference with the octopaminergic system. 2-Heptyl acetate and 2-nonanone might act on both acetylcholinesterase and the octopaminergic receptor. 2-Heptanone might act primarily on acetylcholinesterase. Further studies will warrant possible applications of S. aromaticum bud-derived products as potential larvicides and ovicides for the control of B. procera.
Collapse
Affiliation(s)
- Tae-Kyun Hong
- Department of Agricultural Biotechnology, Seoul National University, Seoul 08826, Republic of Korea; Laboratory of Resource Analysis, R&D Headquarter, Korea Ginseng Cooperation, Daejeon 34128, Republic of Korea
| | - Haribalan Perumalsamy
- Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Kyoung-Hwa Jang
- Laboratory of Resource Analysis, R&D Headquarter, Korea Ginseng Cooperation, Daejeon 34128, Republic of Korea
| | - Eun-Shik Na
- Laboratory of Resource Analysis, R&D Headquarter, Korea Ginseng Cooperation, Daejeon 34128, Republic of Korea
| | - Young-Joon Ahn
- Department of Agricultural Biotechnology, Seoul National University, Seoul 08826, Republic of Korea; Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea.
| |
Collapse
|
5
|
Kim JR, Perumalsamy H, Shin HM, Lee SG, Ahn YJ. Toxicity of Juniperus oxycedrus oil constituents and related compounds and the efficacy of oil spray formulations to Dermatophagoides farinae (Acari: Pyroglyphidae). Exp Appl Acarol 2017; 73:385-399. [PMID: 29181675 DOI: 10.1007/s10493-017-0201-3] [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: 10/11/2017] [Accepted: 11/23/2017] [Indexed: 06/07/2023]
Abstract
The American house dust mite (AHDM), Dermatophagoides farinae Hughes (Acari: Pyroglyphidae), is recognized as an important source of allergens in the domestic environment. This study was conducted to determine whether 19 constituents from essential oil of cade, Juniperus oxycedrus L. (Cupressaceae), eight structurally related compounds, and another 16 previously known cade oil constituents were toxic for adult AHDMs and to determine the route of acaricidal action of the test compounds, as well as to assess the control efficacy of four experimental spray formulations containing the oil (10-40 mg/L sprays). In a fabric-circle contact mortality bioassay, methyleugenol (LD50, 5.82 µg/cm2) and guaiacol (8.24 µg/cm2) were the most toxic compounds against the mites, and the toxicity of these compounds and benzyl benzoate did not significantly differ. High toxicity was also observed with eugenol, m-cresol, and nerolidol (LD50, 12.52-19.52 µg/cm2), and these compounds were significantly more toxic than N,N-diethyl-3-methylbenzamide (DEET) (LD50, 37.67 µg/cm2). Cade applied as 30 or 40 mg/L experimental sprays provided 96 and 100% mortality against the mites, respectively, whereas permethrin (cis:trans, 25:75) 2.5 g/L spray treatment resulted in 17% mortality. In vapor-phase mortality tests, the compounds described were consistently more toxic in closed versus open containers, indicating that toxicity was achieved mainly through the action of vapor. Reasonable mite control in indoor environments can be achieved by spray formulation containing the 40 mg/L cade oil as potential contact-action fumigants.
Collapse
Affiliation(s)
- Jun-Ran Kim
- Experiment and Analysis Division, Animal and Plant Quarantine Agency, Honam Regional Office, Gunsan-si, Jeollabuk-do, 54096, Republic of Korea
| | - Haribalan Perumalsamy
- Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea
| | - He Min Shin
- Department of Agricultural Biotechnology, Seoul National University, Seoul, 08826, Republic of Korea
| | - Sang-Guei Lee
- Crop Protection Division, Department of Crop Life Safety, National Academy of Agricultural Science, Rural Development Administration, Jeonju, 55365, Republic of Korea
| | - Young-Joon Ahn
- Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea.
- Department of Agricultural Biotechnology, Seoul National University, Seoul, 08826, Republic of Korea.
| |
Collapse
|
6
|
Chang KS, Jeon JH, Kim GH, Jang CW, Jeong SJ, Ju YR, Ahn YJ. Repellency of zerumbone identified in Cyperus rotundus rhizome and other constituents to Blattella germanica. Sci Rep 2017; 7:16643. [PMID: 29192195 PMCID: PMC5709496 DOI: 10.1038/s41598-017-16099-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Accepted: 11/07/2017] [Indexed: 01/09/2023] Open
Abstract
The compounds 1,8-cineole and zerumbone (ZER) from the Cyperus rotundus rhizome along with another 11 previously identified rhizome essential oil constituents and α-humulene, which lacks the only carbonyl group present in ZER, as well as binary mixtures of ZER and seven active compounds were tested for repellency to male B. germanica. The results were compared to N,N-diethyl-3-methylbenzamide (deet). In filter-paper choice tests, ZER was the most repellent compound, and α-humulene was ineffective, which indicates that the α,β-unsaturated carbonyl group of ZER is a prerequisite component for repellency. At 81.5 μg cm−2, enhanced repellency was produced by binary mixtures of ZER and 1,8-cineole, (+)-dihydrocarvone or (R)-(+)-limonene (70:30, 50:50 and 30:70 ratios by weight). These mixtures were very effective against male B. germanica within 24 h and were more repellent than a single compound or deet alone. The optimum ZER content was determined to be more than 50%. In Ebeling choice box tests at 652.4 μg cm−2, these compounds and deet resulted in complete repellency to intact male B. germanica, while they exhibited 35–47% repellency to antennectomized male one. Mixtures formulated from the active constituents of the C. rotundus rhizome could be useful as potential repellents for controlling B. germanica.
Collapse
Affiliation(s)
- Kyu-Sik Chang
- Division of Vectors and Parasitic Diseases, Centers for Disease Control and Prevention, Osong, 28159, Chungbuk, South Korea
| | - Jin-Hwan Jeon
- Division of Vectors and Parasitic Diseases, Centers for Disease Control and Prevention, Osong, 28159, Chungbuk, South Korea
| | - Gi-Hun Kim
- Division of Vectors and Parasitic Diseases, Centers for Disease Control and Prevention, Osong, 28159, Chungbuk, South Korea
| | - Chang-Won Jang
- Division of Vectors and Parasitic Diseases, Centers for Disease Control and Prevention, Osong, 28159, Chungbuk, South Korea
| | - Se-Jin Jeong
- Division of Vectors and Parasitic Diseases, Centers for Disease Control and Prevention, Osong, 28159, Chungbuk, South Korea
| | - Young-Ran Ju
- Division of Vectors and Parasitic Diseases, Centers for Disease Control and Prevention, Osong, 28159, Chungbuk, South Korea
| | - Young-Joon Ahn
- Department of Agricultural Biotechnology, Seoul National University, Seoul, 08826, South Korea.
| |
Collapse
|
7
|
Kim CM, Kim SW, Kim DM, Yoon NR, Jha P, Jang SJ, Ahn YJ, Lim D, Lee SH, Hwang SD, Lee YS. Case Report: Polymerase Chain Reaction Testing of Tick Bite Site Samples for the Diagnosis of Human Granulocytic Anaplasmosis. Am J Trop Med Hyg 2017; 97:403-406. [PMID: 28829732 DOI: 10.4269/ajtmh.16-0570] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Human granulocytic anaplasmosis (HGA) is a tick-borne infectious disease caused by Anaplasma phagocytophilum, an obligate intracellular bacterium. Until now, the utility of tick-bite site samples for HGA diagnosis has not been reported. Using a patient's buffy coat and tick-bite site crust samples, we performed polymerase chain reaction (PCR) testing using Ehrlichia- or Anaplasma-specific primers. PCR with buffy coat and crust samples obtained before doxycycline administration was positive. Six days after doxycycline administration, PCR with the buffy coat sample was negative but PCR with a crust tissue sample from the tick-bite site remained positive. This is the first case to suggest that crust tissue at the tick-bite site may be useful for early HGA diagnosis in patients who have already been treated with antibiotics such as doxycycline.
Collapse
Affiliation(s)
- Choon-Mee Kim
- Premedical Science, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Seok Won Kim
- Department of Neurosurgery, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Dong-Min Kim
- Department of Internal Medicine, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Na-Ra Yoon
- Department of Internal Medicine, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Piyush Jha
- Department of Internal Medicine, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Sook Jin Jang
- Department of Laboratory Medicine, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Young-Joon Ahn
- Department of Medical Education, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Donghoon Lim
- Department of Urology, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Seung Hun Lee
- Division of Zoonoses, Center for Immunology and Pathology, Korea National Institute of Health, Korea Centers for Disease Control and Prevention, Cheongju-si, Chungcheongbuk-do, Republic of Korea
| | - Seon Do Hwang
- Division of Zoonoses, Center for Immunology and Pathology, Korea National Institute of Health, Korea Centers for Disease Control and Prevention, Cheongju-si, Chungcheongbuk-do, Republic of Korea
| | - Yeong Seon Lee
- Division of Zoonoses, Center for Immunology and Pathology, Korea National Institute of Health, Korea Centers for Disease Control and Prevention, Cheongju-si, Chungcheongbuk-do, Republic of Korea
| |
Collapse
|
8
|
Xiao L, Jia HF, Jeong IH, Ahn YJ, Zhu YZ. Isolation and Characterization of 2,4-D Butyl Ester Degrading Acinetobacter sp. ZX02 from a Chinese Ginger Cultivated Soil. J Agric Food Chem 2017; 65:7345-7351. [PMID: 28771369 DOI: 10.1021/acs.jafc.7b02140] [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] [Indexed: 06/07/2023]
Abstract
Strain ZX02 was isolated from Chinese ginger cultivated soil contaminated with various pesticides, which could utilize 2,4-dichlorophenoxyacetic acid butyl ester (2,4-D butyl ester) as the sole carbon source. On the basis of the sequence analysis of 16S rRNA gene as well as the morphological, biochemical, and physiological characteristics of strain ZX02, the organism belonged to Gram-negative bacterium and was identified as Acinetobacter sp. ZX02. The strain ZX02 showed a remarkable performance in 2,4-D butyl ester degradation (100% removal in <96 h) in pure culture. Strain ZX02 was sensitive to tetracycline and resistant to amoxicillin and chloramphenicol in an antibiotic sensitivity test. The curing study indicates that the gene for degradation of 2,4-D butyl ester was encoded on a single plasmid of 23 kb. The gene encoding resistance to polymixin B sulfate was also located on this plasmid. On the basis of its greater biodegradation activity, this bacterium is a potential candidate as a bioremediation agent in soils contaminated with 2,4-D butyl ester.
Collapse
Affiliation(s)
- Lin Xiao
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University , Changcheng Road, Chengyang District, Qingdao, Shandong 266-109, China
| | - Hai-Fei Jia
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University , Changcheng Road, Chengyang District, Qingdao, Shandong 266-109, China
| | - In-Hong Jeong
- Division of Crop Protection, National Institute of Agricultural Science, Rural Development Administration , Jeonju 55365, Jeollabuk-do Republic of Korea
| | - Young-Joon Ahn
- Department of Agricultural Biotechnology, Seoul National University , Seoul 08826, Republic of Korea
| | - Yong-Zhe Zhu
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University , Changcheng Road, Chengyang District, Qingdao, Shandong 266-109, China
| |
Collapse
|
9
|
Kim SI, Ahn YJ. Larvicidal activity of lignans and alkaloid identified in Zanthoxylum piperitum bark toward insecticide-susceptible and wild Culex pipiens pallens and Aedes aegypti. Parasit Vectors 2017; 10:221. [PMID: 28472971 PMCID: PMC5418860 DOI: 10.1186/s13071-017-2154-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Accepted: 04/22/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The yellow fever mosquito, Aedes aegypti, and the common house mosquito, Culex pipiens pallens, transmit dengue fever and West Nile virus diseases, respectively. This study was conducted to determine the toxicity of the three lignans (-)-asarinin, sesamin and (+)-xanthoxylol-γ,γ-dimethylallylether (XDA), and the alkaloid pellitorine from Zanthoxylum piperitum (Rutaceae) bark to third-instar larvae from insecticide-susceptible C. pipiens pallens and Ae. aegypti as well as wild C. pipiens pallens resistant to deltamethrin, cyfluthrin, fenthion, and temephos. METHODS The toxicities of all isolates were compared with those of mosquito larvicide temephos. LC50 values for each species and their treatments were significantly different from one another when their 95% confidence intervals did not overlap. RESULTS XDA was isolated from Z. piperitum as a new larvicidal principle. XDA (LC50, 0.27 and 0.24 mg/l) was 4, 53, and 144 times and 4, 100, and 117 times more toxic than pellitorine, sesamin, and asarinin toward larvae from susceptible C. pipiens pallens and Ae. aegypti, respectively. Overall, all the isolates were less toxic than temephos (LC50, 0.006 and 0.009 mg/l). These constituents did not differ in toxicity to larvae from the two Culex strains. The present finding indicates that the lignans and alkaloid and the insecticides do not share a common mode of larvicidal action or elicit cross-resistance. CONCLUSION Naturally occurring Z. piperitum bark-derived compounds, particularly XDA, merit further study as potential mosquito larval control agents or as lead compounds for the control of insecticide-resistant mosquito populations.
Collapse
Affiliation(s)
- Soon-Il Kim
- NARESO R&D Center, Seoul National University Business Incubator, Suwon, 16614, South Korea
| | - Young-Joon Ahn
- Department of Agricultural Biotechnology, Seoul National University, Seoul, 08826, South Korea.
| |
Collapse
|
10
|
Ahn YJ, Hong KE, Yum HR, Lee JH, Kim KS, Youn YA, Park SH. Characteristic clinical features associated with aggressive posterior retinopathy of prematurity. Eye (Lond) 2017; 31:924-930. [PMID: 28234354 DOI: 10.1038/eye.2017.18] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Accepted: 12/22/2016] [Indexed: 12/13/2022] Open
Abstract
PurposeTo identify the risk factors for, and clinical features and treatment outcomes of aggressive posterior retinopathy of prematurity (APROP) in Korean infants.MethodsAmong 770 premature infants who underwent screening, 105 infants (198 eyes, 13.63%) received treatment for ROP. A total of 24 infants (48 eyes, 3.12%) developed APROP while 81 infants (150 eyes, 10.52%) developed non-APROP treatment-requiring type. The medical records of ROP-treated infants were reviewed retrospectively. The associated systemic and maternal risk factors were analyzed and anatomical outcomes were compared according to the severity of ROP and treatment modalities.ResultsThe mean gestational age and birth weight at birth in the APROP group were significantly lower than those in the non-APROP group (P=0.019, P<0.001, respectively). Infants who were born small for their GA developed APROP more frequently than non-APROP patients (P<0.001). Chorioamnionitis-positive infants also showed higher incidence rate of APROP (APROP vs non-APROP; P<0.001 and zone I APROP vs posterior zone II APROP; P=0.036, respectively). Infants with APROP required heavier laser treatment with a higher retreatment rate compared to infants with non-APROP. Favorable anatomical outcomes were achieved in 95.3% from treatment-requiring non-APROP group, 85.7% from zone I APROP and 84.6% from posterior zone II APROP group.ConclusionIntrauterine growth restriction and chorioamnionitis were associated with development of APROP. These findings suggest that perinatal maternal environment inhibiting normal retinal vascular growth in utero may contribute to increasing the risk of APROP in premature infants.
Collapse
Affiliation(s)
- Y J Ahn
- Department of Ophthalmology and Visual Science, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - K E Hong
- Department of Ophthalmology and Visual Science, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - H R Yum
- Department of Ophthalmology, Konyang University Hospital, Daejeon, South Korea
| | - J H Lee
- Department of Ophthalmology and Visual Science, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - K S Kim
- Apgujeong St Mary's Eye Center, Seoul, South Korea
| | - Y A Youn
- Department of Pediatrics, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - S H Park
- Department of Ophthalmology and Visual Science, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| |
Collapse
|
11
|
Kim CM, Choi IS, Jang SJ, Yun NR, Kim DM, Lim D, Ahn YJ, Kang SH, Park G, Moon DS. Assessment of Efflux Activity Using H33342 Accumulation in Tigecycline-Resistant Acinetobacter baumannii Clinical Isolates. Ann Clin Microbiol 2017. [DOI: 10.5145/acm.2017.20.4.90] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- Choon-Mee Kim
- Premedical Science, College of Medicine, Chosun University, Gwangju, Korea
| | - In Sun Choi
- Department of Laboratory Medicine, College of Medicine, Chosun University, Gwangju, Korea
| | - Sook Jin Jang
- Department of Laboratory Medicine, College of Medicine, Chosun University, Gwangju, Korea
| | - Na-Ra Yun
- Department of Internal Medicine, College of Medicine, Chosun University, Gwangju, Korea
| | - Dong-Min Kim
- Department of Internal Medicine, College of Medicine, Chosun University, Gwangju, Korea
| | - Donghoon Lim
- Department of Urology, College of Medicine, Chosun University, Gwangju, Korea
| | - Young-Joon Ahn
- Department of Medical Education, College of Medicine, Chosun University, Gwangju, Korea
| | - Seong Ho Kang
- Department of Laboratory Medicine, College of Medicine, Chosun University, Gwangju, Korea
| | - Geon Park
- Department of Laboratory Medicine, College of Medicine, Chosun University, Gwangju, Korea
| | - Dae Soo Moon
- Department of Laboratory Medicine, College of Medicine, Chosun University, Gwangju, Korea
| |
Collapse
|
12
|
Yang BK, Yi SR, Ahn YJ, Im SH, Park SH. Ischial Tuberosity Avulsion Stress Fracture after Short Period of Repetitive Training. Hip Pelvis 2016; 28:187-190. [PMID: 27777924 PMCID: PMC5067398 DOI: 10.5371/hp.2016.28.3.187] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 08/31/2016] [Accepted: 09/06/2016] [Indexed: 11/24/2022] Open
Abstract
Fatigue fracture of the pelvis is the form of fracture due to repetitive micro-stress accumulation, can be affected by a number of factors such as patient's nutritional status, biomechanics, social status and so on. Still there is no study about precise standard degree of external force that lead to stress fracture, but it may caused by compression force, traction force or complex force and others. Avulsion stress to ischial tuberosity or anterior superior iliac spine by attached muscle is known as the main factor for the avulsion fracture. This report will deal with 19 years old conscripted policeman who occurred ischial tuberosity avulsion fracture after training of 6-hour running for 5 days accompanying hip hyper-flexion motion. This reports aims to provide case study of stress fracture occurred after 5 days of exercise which is relatively short period who had no specific trauma history or pain.
Collapse
Affiliation(s)
- Bo-Kyu Yang
- Department of Orthopedic Surgery, National Police Hospital, Seoul, Korea
| | - Seung-Rim Yi
- Department of Orthopedic Surgery, National Police Hospital, Seoul, Korea
| | - Young-Joon Ahn
- Department of Orthopedic Surgery, National Police Hospital, Seoul, Korea
| | - Se-Hyuk Im
- Department of Orthopedic Surgery, National Police Hospital, Seoul, Korea
| | - Sang-Hyun Park
- Department of Orthopedic Surgery, National Police Hospital, Seoul, Korea
| |
Collapse
|
13
|
Jha P, Kim CM, Kim DM, Chung JH, Yoon NR, Jha B, Kim SW, Jang SJ, Ahn YJ, Chung JK, Jeon DY. Transmission of Enterobacter aerogenes septicemia in healthcare workers. Springerplus 2016; 5:1397. [PMID: 27610316 PMCID: PMC4994813 DOI: 10.1186/s40064-016-3011-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [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: 12/17/2015] [Accepted: 08/05/2016] [Indexed: 11/10/2022]
Abstract
Enterobacter aerogenes is recognized as an important bacterial pathogen in hospital-acquired infections. This report describes two unusual cases of septicemia caused by E. aerogenes in immunocompetent healthcare workers. E. aerogenes was isolated from blood cultures of the two patients experiencing septicemia. The clinical isolates were initially identified as E. aerogenes using a VITEK II automated system and 16S rRNA sequence analysis, and; both isolates involved in the outbreak shared a common pulse-field gel electrophoresis pattern. The similarities between the two cases included the simultaneous development of gastroenteritis symptoms, severe sepsis and thrombocytopenia after taking intravenous injections of ketorolac tromethamine. A common source of normal saline, a 100 mL bottle, was used for diluting the analgesic in both cases. In addition to the general population, healthcare workers, especially those who are also intravenous drug abusers, should be considered subjects that could cause a transmission of Enterobacter infection.
Collapse
Affiliation(s)
- Piyush Jha
- Department of Internal Medicine, School of Medicine, Chosun University, 588 Seosuk-dong, Dong-gu, Gwangju, 501-717 Republic of Korea
| | - Choon-Mee Kim
- Premedical Science, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Dong-Min Kim
- Department of Internal Medicine, School of Medicine, Chosun University, 588 Seosuk-dong, Dong-gu, Gwangju, 501-717 Republic of Korea
| | - Jong-Hoon Chung
- Department of Internal Medicine, School of Medicine, Chosun University, 588 Seosuk-dong, Dong-gu, Gwangju, 501-717 Republic of Korea
| | - Na-Ra Yoon
- Department of Internal Medicine, School of Medicine, Chosun University, 588 Seosuk-dong, Dong-gu, Gwangju, 501-717 Republic of Korea
| | - Babita Jha
- Department of Internal Medicine, School of Medicine, Chosun University, 588 Seosuk-dong, Dong-gu, Gwangju, 501-717 Republic of Korea
| | - Seok Won Kim
- Department of Neurosurgery, School of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Sook Jin Jang
- Department of Laboratory Medicine, School of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Young-Joon Ahn
- Department of Medical Education, School of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Jae Keun Chung
- Health and Environment Research Institute of Gwangju Metropolitan City, Gwangju, Republic of Korea
| | - Doo Young Jeon
- Microbiology Division, Jeollanam-do Institute of Health and Environment, Muan, Republic of Korea
| |
Collapse
|
14
|
Yi CG, Hieu TT, Lee SH, Choi BR, Kwon M, Ahn YJ. Toxicity of Lavandula angustifolia oil constituents and spray formulations to insecticide-susceptible and pyrethroid-resistant Plutella xylostella and its endoparasitoid Cotesia glomerata. Pest Manag Sci 2016; 72:1202-1210. [PMID: 26350499 DOI: 10.1002/ps.4098] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [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: 05/07/2015] [Revised: 07/20/2015] [Accepted: 08/11/2015] [Indexed: 06/05/2023]
Abstract
BACKGROUND Plutella xylostella is one of the most serious insect pests of cruciferous crops. This study was conducted to determine the toxicity of 21 constituents from Lavandula angustifolia essential oil (LA-EO) and another 16 previously known LA-EO constituents and the toxicity of six experimental spray formulations containing the oil (1-6 g L(-1) sprays) to susceptible KS-PX and pyrethroid-resistant JJ-PX P. xylostella larvae, as well as to its endoparasitoid Cotesia glomerata adults. RESULTS Linalool and linalool oxide (LC50 = 0.016 mg cm(-3) ) were the most toxic fumigant compounds and were 10.7-fold less toxic than dichlorvos to KS-PX larvae. Either residual or fumigant toxicity of these compounds was almost identical against larvae from either of the two strains. Against C. glomerata, dichlorvos (LC50 = 7 × 10(-6) mg cm(-3) ) was the most toxic insecticide. LA-EO was ∼1430 times less toxic than dichlorvos. The oil applied as 6 g L(-1) spray and emamectin benzoate 21.5 g L(-1) emulsifiable concentrate provided 100% mortality against larvae from either of the two strains. CONCLUSION Reasonable P. xylostella control in greenhouses can be achieved by a spray formulation containing the 6 g L(-1) oil as potential contact-action fumigant. © 2015 Society of Chemical Industry.
Collapse
Affiliation(s)
- Chang Geun Yi
- Department of Agricultural Biotechnology, Seoul National University, Seoul, South Korea
| | - Tran Trung Hieu
- Department of Plant Biotechnology and Biotransformation, Faculty of Biology, Ho Chi Minh City University of Science, Vietnam National University, Ho Chi Minh, Vietnam
| | - Si Hyeock Lee
- Department of Agricultural Biotechnology, Seoul National University, Seoul, South Korea
| | - Byeoung-Ryeol Choi
- Crop Protection Division, Department of Crop Life Safety, National Academy of Agricultural Science, Rural Development Administration, Jeonju, South Korea
| | - Min Kwon
- Highland Agriculture Research Institute, National Institute of Crop Science, Rural Development Administration, Pyeongchang, South Korea
| | - Young-Joon Ahn
- Department of Agricultural Biotechnology, Seoul National University, Seoul, South Korea
| |
Collapse
|
15
|
Wang ZQ, Perumalsamy H, Wang M, Shu S, Ahn YJ. Larvicidal activity of Magnolia denudata seed hydrodistillate constituents and related compounds and liquid formulations towards two susceptible and two wild mosquito species. Pest Manag Sci 2016; 72:897-906. [PMID: 26085316 DOI: 10.1002/ps.4064] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [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: 03/20/2015] [Revised: 06/15/2015] [Accepted: 06/15/2015] [Indexed: 06/04/2023]
Abstract
BACKGROUND Anopheles sinensis, Aedes aegypti and Aedes albopictus and Culex pipiens pallens mosquitoes transmit malaria, dengue fever and West Nile virus diseases respectively. This study was conducted to determine the toxicity of 17 constituents from Magnolia denudata seed hydrodistillate (MD-SHD) and four experimental MD-SHD liquid formulations (10-50 mg L(-1) liquid) to third-instar larvae from insecticide-susceptible Cx. p. pallens and Ae. aegypti as well as wild Ae. albopictus and An. sinensis. RESULTS 2,4-Di-tert-butylphenol was the most toxic constituent (LC50 1.98-3.90 mg L(-1)), followed by linoleic acid (7.19-10.49 mg L(-1)), towards larvae of the four mosquito species. High toxicity was also produced by nerolidol, (±)-limonene, α-terpinene and γ-terpinene (LC50 9.84-36.42 mg L(-1)). The toxicity of these compounds was virtually identical towards larvae of the four mosquito species, even though An. sinensis larvae were resistant to deltamethrin and temephos. The MS-SHD 50 mg L(-1) liquid resulted in 92-100% control towards larvae of the four mosquito species, while commercial temephos 200 g L(-1) emulsifiable concentrate was almost ineffective towards An. sinensis larvae (30% mortality). CONCLUSION Reasonable mosquito control in the aquatic environment can be achieved by MD-SHD 50 mg L(-1) liquid as a potential larvicide.
Collapse
Affiliation(s)
- Zhang-Qian Wang
- Entomology Major, Department of Agricultural Biotechnology, Seoul National University, Seoul, South Korea
| | - Haribalan Perumalsamy
- Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
| | - Mo Wang
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Shaohua Shu
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Young-Joon Ahn
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
- Biomodulation Major, Department of Agricultural Biotechnology, Seoul National University, Seoul, South Korea
| |
Collapse
|
16
|
Ham DY, Choi WS, Song SH, Ahn YJ, Park HK, Kim HG, Son H. Prospective Randomized Controlled Study on the Efficacy of Multimedia Informed Consent for Patients Scheduled to Undergo Green-Light High-Performance System Photoselective Vaporization of the Prostate. World J Mens Health 2016; 34:47-55. [PMID: 27169129 PMCID: PMC4853770 DOI: 10.5534/wjmh.2016.34.1.47] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Revised: 03/20/2016] [Accepted: 03/21/2016] [Indexed: 11/24/2022] Open
Abstract
Purpose The aim of this study was to evaluate the efficacy of a multimedia informed consent (IC) presentation on the understanding and satisfaction of patients who were scheduled to receive 120-W green-light high-performance system photoselective vaporization of the prostate (HPS-PVP). Materials and Methods A multimedia IC (M-IC) presentation for HPS-PVP was developed. Forty men with benign prostatic hyperplasia who were scheduled to undergo HPS-PVP were prospectively randomized to a conventional written IC group (W-IC group, n=20) or the M-IC group (n=20). The allocated IC was obtained by one certified urologist, followed by a 15-question test (maximum score, 15) to evaluate objective understanding, and questionnaires on subjective understanding (range, 0~10) and satisfaction (range, 0~10) using a visual analogue scale. Results Demographic characteristics, including age and the highest level of education, did not significantly differ between the two groups. No significant differences were found in scores reflecting the objective understanding of HPS-PVP (9.9±2.3 vs. 10.6±2.8, p=0.332) or in subjective understanding scores (7.5±2.1 vs. 8.6±1.7, p=0.122); however, the M-IC group showed higher satisfaction scores than the W-IC group (7.4±1.7 vs. 8.4±1.5, p=0.033). After adjusting for age and educational level, the M-IC group still had significantly higher satisfaction scores. Conclusions M-IC did not enhance the objective knowledge of patients regarding this surgical procedure. However, it improved the satisfaction of patients with the IC process itself.
Collapse
Affiliation(s)
- Dong Yeub Ham
- Department of Urology, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, Korea
| | - Woo Suk Choi
- Department of Urology, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, Korea
| | - Sang Hoon Song
- Department of Urology, Asan Medical Center, Seoul, Korea
| | - Young-Joon Ahn
- Department of Surgery, SMG-SNU Boramae Medical Center, Seoul National University Collegy of Medicine, Seoul, Korea
| | - Hyoung Keun Park
- Department of Urology, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, Korea
| | - Hyeong Gon Kim
- Department of Urology, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, Korea
| | - Hwancheol Son
- Department of Urology, SMG-SNU Boramae Medical Center, Seoul National University Collegy of Medicine, Seoul, Korea
| |
Collapse
|
17
|
Kim JR, Perumalsamy H, Lee JH, Ahn YJ, Lee YS, Lee SG. Acaricidal activity of Asarum heterotropoides root-derived compounds and hydrodistillate constitutes toward Dermanyssus gallinae (Mesostigmata: Dermanyssidae). Exp Appl Acarol 2016; 68:485-495. [PMID: 26708137 DOI: 10.1007/s10493-015-0005-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [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: 06/09/2015] [Accepted: 12/15/2015] [Indexed: 06/05/2023]
Abstract
The acaricidal activity of Asarum heterotropoides root-derived principles, methyleugenol, safrole, 3-carene, α-asarone, pentadecane and A. heterotropoides root steam distillate constituents was tested against poultry red mites Dermanyssus gallinae (De Geer). All active principles were identified by spectroscopic analysis. Results were compared with those of two conventional acaricides, benzyl benzoate and N,N-diethyl-3-methylbenzamide (DEET). Methyleugenol (24 h LC50 = 0.57 µg/cm(2)) and safrole (24 h LC50 = 8.54 µg/cm(2)) were the most toxic compounds toward D. gallinae, followed by 3,4,5-trimethoxytoluene, 3,5-dimethoxytoluene, estragole, α-terpineol, verbenone, eucarvone, linalool, and terpinen-4-ol (LC50 = 15.65-27.88 µg/cm(2)). Methyleugenol was 16.7× and 11.0× more toxic than benzyl benzoate (LC50 = 9.52 μg/cm(2)) and DEET (LC50 = 6.28 μg/cm(2)), respectively; safrole was 1.1× and 0.73× more toxic. Asarum heterotropoides root-derived materials, particularly methyleugenol and safrole, merit further study as potential acaricides. Global efforts to reduce the level of highly toxic synthetic acaricides in indoor environments justify further studies on A. heterotropoides root extract and steam distillate preparations containing the active constituents described as potential contact-action fumigants for the control of mites.
Collapse
Affiliation(s)
- Jun-Ran Kim
- Crop Protection Division, Department of Agro-food Safety and Crop Protection, National Institute of Agricultural Sciences, Rural Development Administration, Wanju, 565-851, Republic of Korea.
| | - Haribalan Perumalsamy
- Research Institute for Agriculture and Life Science, Seoul National University, Seoul, 151-921, South Korea
| | - Ju-Hee Lee
- Crop Protection Division, Department of Agro-food Safety and Crop Protection, National Institute of Agricultural Sciences, Rural Development Administration, Wanju, 565-851, Republic of Korea
| | - Young-Joon Ahn
- Research Institute for Agriculture and Life Science, Seoul National University, Seoul, 151-921, South Korea
| | - Young Su Lee
- Gyeonggi Agricultural Research and Extension Services, Hwaseong, 445-784, Republic of Korea
| | - Sang-Guie Lee
- Crop Protection Division, Department of Agro-food Safety and Crop Protection, National Institute of Agricultural Sciences, Rural Development Administration, Wanju, 565-851, Republic of Korea
| |
Collapse
|
18
|
Ahn YJ, Jo SH, Lee SH, Lim JH. The Review Study on Yoga, Qigong, and Taichi Interventions for Anxiety: Based on Korean Journal Articles from 2009 to 2015. ACTA ACUST UNITED AC 2016. [DOI: 10.7231/jon.2016.27.1.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
19
|
Wang X, Sankarapandian K, Cheng Y, Woo SO, Kwon HW, Perumalsamy H, Ahn YJ. Relationship between total phenolic contents and biological properties of propolis from 20 different regions in South Korea. Altern Ther Health Med 2016; 16:65. [PMID: 26888665 PMCID: PMC4758169 DOI: 10.1186/s12906-016-1043-y] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Accepted: 02/12/2016] [Indexed: 11/10/2022]
Abstract
Background Propolis (or bee glue), collected from botanical sources by honey bee, has been used as a popular natural remedies in folk medicine throughout the world. This study was conducted to assess growth inhibitory effects of ethanol extracts of propolis (EEPs) from 20 different regions in South Korea on human intestinal bacteria as well as their human β-amyloid precursor cleavage enzyme (BACE-1), acetylcholinesterase (AChE) inhibitory, antioxidant, antiproliferative, and anti-human rhinovirus activities. Methods The Bonferroni multiple-comparison method was used to test for significant differences in total polyphenol and flavonoid contents among EEP samples using SAS 9.13 program. Correlation coefficient (r) analysis of the biological activities of EEP samples was determined using their 50 % inhibition concentration or minimal inhibitory concentration values and their polyphenol or flavonoid contents in 20 native Korean EEP samples. Results The amounts of total polyphenol and flavonoids in the Korean EEP samples ranged from 49 to 239 mg gallic acid equivalent (GAE)/g EEP (Brazilian, Chinese, and Australian samples, 127–142 mg GAE/g EEP) and from 21 to 50 mg quercetin equivalent (QE)/g EEP (Brazilian, Chinese, and Australian samples, 33–53 mg QE/g EEP), respectively. Correlation coefficient analysis showed that total polyphenol contents may be negatively correlated with 2,2-diphenyl-1-picrylhydrazyl free radical scavenging activity (r = −0.872) and total flavonoid content has no correlation with the activity (r = 0.071). No direct correlation between BACE-1 inhibition, AChE inhibition, or antiproliferative activity and total polyphenol or total flavonoid content in Korean EEP samples was found. Gram-positive and Gram-negative bacteria were observed to have different degrees of antimicrobial susceptibility to the EEP samples examined, although ciprofloxacin susceptibility among the bacterial groups did not differ greatly. Conclusions Further studies will warrant possible applications of propolis as potential therapeutic BACE-1 blocker, antioxidant, antiproliferative agent, and antimicrobial agent.
Collapse
|
20
|
Lee M, Jung JW, Kim D, Ahn YJ, Hong S, Kwon HW. Discrimination of Umami Tastants Using Floating Electrode-Based Bioelectronic Tongue Mimicking Insect Taste Systems. ACS Nano 2015; 9:11728-11736. [PMID: 26563753 DOI: 10.1021/acsnano.5b03031] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We report a floating electrode-based bioelectronic tongue mimicking insect taste systems for the detection and discrimination of umami substances. Here, carbon nanotube field-effect transistors with floating electrodes were hybridized with nanovesicles containing honeybee umami taste receptor, gustatory receptor 10 of Apis mellifera (AmGr10). This strategy enables us to discriminate between l-monosodium glutamate (MSG), best-known umami tastant, and non-umami substances with a high sensitivity and selectivity. It could also be utilized for the detection of MSG in liquid food such as chicken stock. Moreover, we demonstrated the synergism between MSG and disodium 5'-inosinate (IMP) for the umami taste using this platform. This floating electrode-based bioelectronic tongue mimicking insect taste systems can be a powerful platform for various applications such as food screening, and it also can provide valuable insights on insect taste systems.
Collapse
Affiliation(s)
- Minju Lee
- Department of Physics and Astronomy, and Institute of Applied Physics, Seoul National University , Seoul 151-747, Korea
| | - Je Won Jung
- Biomodulation Major, Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, College of Agriculture & Life Sciences, Seoul National University , Seoul 151-921, Korea
| | - Daesan Kim
- Department of Biophysics and Chemical Biology, Seoul National University , Seoul 151-747, Korea
| | - Young-Joon Ahn
- Biomodulation Major, Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, College of Agriculture & Life Sciences, Seoul National University , Seoul 151-921, Korea
| | - Seunghun Hong
- Department of Physics and Astronomy, and Institute of Applied Physics, Seoul National University , Seoul 151-747, Korea
| | - Hyung Wook Kwon
- Biomodulation Major, Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, College of Agriculture & Life Sciences, Seoul National University , Seoul 151-921, Korea
| |
Collapse
|
21
|
Wang X, Perumalsamy H, Kwon HW, Na YE, Ahn YJ. Effects and possible mechanisms of action of acacetin on the behavior and eye morphology of Drosophila models of Alzheimer's disease. Sci Rep 2015; 5:16127. [PMID: 26530776 PMCID: PMC4632086 DOI: 10.1038/srep16127] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Accepted: 10/06/2015] [Indexed: 12/03/2022] Open
Abstract
The human β-amyloid (Aβ) cleaving enzyme (BACE-1) is a target for Alzheimer’s disease (AD) treatments. This study was conducted to determine if acacetin extracted from the whole Agastache rugosa plant had anti-BACE-1 and behavioral activities in Drosophila melanogaster AD models and to determine acacetin’s mechanism of action. Acacetin (100, 300, and 500 μM) rescued amyloid precursor protein (APP)/BACE1-expressing flies and kept them from developing both eye morphology (dark deposits, ommatidial collapse and fusion, and the absence of ommatidial bristles) and behavioral (motor abnormalities) defects. The reverse transcription polymerase chain reaction analysis revealed that acacetin reduced both the human APP and BACE-1 mRNA levels in the transgenic flies, suggesting that it plays an important role in the transcriptional regulation of human BACE-1 and APP. Western blot analysis revealed that acacetin reduced Aβ production by interfering with BACE-1 activity and APP synthesis, resulting in a decrease in the levels of the APP carboxy-terminal fragments and the APP intracellular domain. Therefore, the protective effect of acacetin on Aβ production is mediated by transcriptional regulation of BACE-1 and APP, resulting in decreased APP protein expression and BACE-1 activity. Acacetin also inhibited APP synthesis, resulting in a decrease in the number of amyloid plaques.
Collapse
Affiliation(s)
- Xue Wang
- Department of Agricultural Biotechnology, Seoul National University, Seoul 151-921, Republic of Korea
| | - Haribalan Perumalsamy
- Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea
| | - Hyung Wook Kwon
- Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea
| | - Young-Eun Na
- R&D Coordination Division, Rural Development Administration, Jeonju 560-500, Republic of Korea
| | - Young-Joon Ahn
- Department of Agricultural Biotechnology, Seoul National University, Seoul 151-921, Republic of Korea.,College of Plant Science &Technology, Huazhong Agricultural University, Wuhan 430070, Hubei, P.R. China
| |
Collapse
|
22
|
Jayakodi M, Jung JW, Park D, Ahn YJ, Lee SC, Shin SY, Shin C, Yang TJ, Kwon HW. Genome-wide characterization of long intergenic non-coding RNAs (lincRNAs) provides new insight into viral diseases in honey bees Apis cerana and Apis mellifera. BMC Genomics 2015; 16:680. [PMID: 26341079 PMCID: PMC4559890 DOI: 10.1186/s12864-015-1868-7] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2015] [Accepted: 08/19/2015] [Indexed: 01/22/2023] Open
Abstract
BACKGROUND Long non-coding RNAs (lncRNAs) are a class of RNAs that do not encode proteins. Recently, lncRNAs have gained special attention for their roles in various biological process and diseases. RESULTS In an attempt to identify long intergenic non-coding RNAs (lincRNAs) and their possible involvement in honey bee development and diseases, we analyzed RNA-seq datasets generated from Asian honey bee (Apis cerana) and western honey bee (Apis mellifera). We identified 2470 lincRNAs with an average length of 1011 bp from A. cerana and 1514 lincRNAs with an average length of 790 bp in A. mellifera. Comparative analysis revealed that 5 % of the total lincRNAs derived from both species are unique in each species. Our comparative digital gene expression analysis revealed a high degree of tissue-specific expression among the seven major tissues of honey bee, different from mRNA expression patterns. A total of 863 (57 %) and 464 (18 %) lincRNAs showed tissue-dependent expression in A. mellifera and A. cerana, respectively, most preferentially in ovary and fat body tissues. Importantly, we identified 11 lincRNAs that are specifically regulated upon viral infection in honey bees, and 10 of them appear to play roles during infection with various viruses. CONCLUSIONS This study provides the first comprehensive set of lincRNAs for honey bees and opens the door to discover lincRNAs associated with biological and hormone signaling pathways as well as various diseases of honey bee.
Collapse
Affiliation(s)
- Murukarthick Jayakodi
- Department of Plant Science, Plant Genomics and Breeding Institute, Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, 151-921, Republic of Korea.
| | - Je Won Jung
- WCU Biomodulation Major, Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, 151-921, Republic of Korea.
| | - Doori Park
- WCU Biomodulation Major, Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, 151-921, Republic of Korea.
| | - Young-Joon Ahn
- WCU Biomodulation Major, Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, 151-921, Republic of Korea.
| | - Sang-Choon Lee
- Department of Plant Science, Plant Genomics and Breeding Institute, Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, 151-921, Republic of Korea.
| | - Sang-Yoon Shin
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, 151-921, Republic of Korea.
| | - Chanseok Shin
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, 151-921, Republic of Korea.
| | - Tae-Jin Yang
- Department of Plant Science, Plant Genomics and Breeding Institute, Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, 151-921, Republic of Korea.
| | - Hyung Wook Kwon
- WCU Biomodulation Major, Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, 151-921, Republic of Korea.
| |
Collapse
|
23
|
Hieu TT, Choi WS, Kim SI, Wang M, Ahn YJ. Enhanced repellency of binary mixtures of Calophyllum inophyllum nut oil fatty acids or their esters and three terpenoids to Stomoxys calcitrans. Pest Manag Sci 2015; 71:1213-1218. [PMID: 25204729 DOI: 10.1002/ps.3904] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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: 06/08/2014] [Revised: 08/14/2014] [Accepted: 09/04/2014] [Indexed: 06/03/2023]
Abstract
BACKGROUND An assessment was made of the repellency to female stable flies of tamanu nut oil fatty acids or their esters alone (each 0.5 mg cm(-2) ) or in combination with cuminyl alcohol, cuminaldehyde and α-phellandrene (each 0.25 mg cm(-2) ), using an exposed human hand bioassay. Results were compared with those of synthetic repellent DEET (0.25 mg cm(-2) ). RESULTS Based upon protection time (PT) (time to first bite of stable fly), oleic acid, linoleic acid, methyl oleate or methyl linoleate synergised the repellency of each monoterpenoid and DEET. For example, the binary mixture of oleic acid and cuminyl alcohol (PT 2.05 h) resulted in significantly greater repellency than either oleic acid (0.55 h), cuminyl alcohol (0.70 h) or DEET alone (1.50 h). The binary mixtures of oleic acid and cuminyl alcohol or DEET (PT 2.10 h) did not differ significantly in repellency. The structure-activity relationship indicates that the degree of saturation, the side chain length and the functional group of fatty acids appear to play a role in determining the fatty acid repellency to stable flies. CONCLUSION Mixtures formulated from fatty acid and monoterpenoid could be useful as potential repellents for protecting humans and possibly domestic animals from bites caused by stable fly.
Collapse
Affiliation(s)
- Tran Trung Hieu
- Department of Plant Biotechnology and Biotransformation, Faculty of Biology, Ho Chi Minh City University of Science, Vietnam National University, Ho Chi Minh, Vietnam
| | - Won Sil Choi
- National Instrumentation Centre for Environmental Management, Seoul National University, Seoul, South Korea
| | - Soon-Il Kim
- Nareso Co., Ltd, Bio Venture Valley, Seoul National University, Suwon, Gyeonggi, South Korea
| | - Mo Wang
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Young-Joon Ahn
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
- Department of Agricultural Biotechnology, Seoul National University, Seoul, South Korea
| |
Collapse
|
24
|
Kim KH, Yi CG, Ahn YJ, Kim SI, Lee SG, Kim JR. Fumigant toxicity of basil oil compounds and related compounds to Thrips palmi and Orius strigicollis. Pest Manag Sci 2015; 71:1292-1296. [PMID: 25315807 DOI: 10.1002/ps.3925] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [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: 02/21/2014] [Revised: 09/28/2014] [Accepted: 10/06/2014] [Indexed: 06/04/2023]
Abstract
BACKGROUND This study was aimed at assessing the fumigant toxicity to adult Thrips palmi (a serious insect pest) and Orius strigicollis (a beneficial predator insect) of basil (Ocimum basilicum) essential oil compounds and structurally related compounds using vapour-phase toxicity bioassays. RESULTS Against adult T. palmi, linalool (LD50 0.0055 mg cm(-3) ) was the most toxic fumigant and was 15.2-fold more effective than dichlorvos (0.0837 mg cm(-3) ). Strong fumigant toxicity was also observed in pulegone (0.0095 mg cm(-3) ), (±)-camphor (0.0097 mg cm(-3) ) and 1,8-cineole (0.0167 mg cm(-3) ). Moderate toxicity was produced by camphene, 3-carene, (-)-menthone, (+)-α-pinene, (+)-β-pinene, α-terpineol and (-)-α-thujone (0.0215-0.0388 mg cm(-3) ). Against adult O. strigicollis, dichlorvos (LD50 9.0 × 10(-10) mg cm(-3) ) was the most toxic fumigant, whereas the LD50 values of these compounds ranged from 0.0127 to >0.23 mg cm(-3) . Based upon the selective toxicity ratio, the compounds described are more selective than dichlorvos. CONCLUSION The basil oil compounds described merit further study as potential insecticides for control of T. palmi in greenhouses because of their generally lower toxicity to O. strigicollis and their greater activity as a fumigant than dichlorvos.
Collapse
Affiliation(s)
- Kwang-Ho Kim
- Crop Protection Division, Department of Crop Life Safety, National Academy of Agricultural Science, Rural Development Administration, Wanju, Republic of Korea
| | - Chang-Geun Yi
- Department of Agricultural Biotechnology, Seoul National University, Seoul, Republic of Korea
| | - Young-Joon Ahn
- Department of Agricultural Biotechnology, Seoul National University, Seoul, Republic of Korea
| | - Soon Il Kim
- Department of Agricultural Biotechnology, Seoul National University, Seoul, Republic of Korea
| | - Sang-Guei Lee
- Crop Protection Division, Department of Crop Life Safety, National Academy of Agricultural Science, Rural Development Administration, Wanju, Republic of Korea
| | - Jun-Ran Kim
- Crop Protection Division, Department of Crop Life Safety, National Academy of Agricultural Science, Rural Development Administration, Wanju, Republic of Korea
| |
Collapse
|
25
|
Murugan K, Sanoopa CP, Madhiyazhagan P, Dinesh D, Subramaniam J, Panneerselvam C, Roni M, Suresh U, Nicoletti M, Alarfaj AA, Munusamy MA, Higuchi A, Kumar S, Perumalsamy H, Ahn YJ, Benelli G. Rapid biosynthesis of silver nanoparticles usingCrotalaria verrucosaleaves against the dengue vectorAedes aegypti: what happens around? An analysis of dragonfly predatory behaviour after exposure at ultra-low doses. Nat Prod Res 2015; 30:826-33. [DOI: 10.1080/14786419.2015.1074230] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
26
|
Yi JH, Perumalsamy H, Sankarapandian K, Choi BR, Ahn YJ. Fumigant Toxicity of Phenylpropanoids Identified in Asarum sieboldii Aerial Parts to Lycoriella ingenua (Diptera: Sciaridae) and Coboldia fuscipes (Diptera: Scatopsidae). J Econ Entomol 2015; 108:1208-1214. [PMID: 26470247 DOI: 10.1093/jee/tov064] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [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: 01/03/2015] [Accepted: 03/03/2015] [Indexed: 06/05/2023]
Abstract
Lycoriella ingenua (Dufour) (Diptera: Sciaridae) and Coboldia fuscipes (Meigen) (Diptera: Scatopsidae) are two of the most economically important insect pests of cultivated mushrooms. The toxicities to the fly larvae of the three phenylpropanoids (methyleugenol, myristicin, and safrole) from aerial parts of Asarum sieboldii Miquel (Aristolochiaceae) were compared with those of the currently available carbamate insecticide benfuracarb. In a contact+fumigant mortality bioassay with L. ingenua and C. fuscipes larvae, methyleugenol (1.46 and 2.33 µg/cm2) was the most toxic compound, followed by safrole (2.03 and 2.59 µg/cm2) and myristicin (3.59 and 4.96 µg/cm2), based on 24-h LC50 values. The phenylpropanoids were less toxic than benfuracarb (LC50, 0.75 and 0.55 µg/cm2). In vapor-phase mortality tests with the larvae, the phenylpropanoids were consistently more toxic in closed versus open containers, indicating that the effect of the compounds was largely a result of vapor action. Global efforts to reduce the level of highly toxic synthetic insecticides in the agricultural environment justify further studies on A. sieboldii plant-derived products as potential fumigants for the control of mushroom fly populations in mushroom houses and mushroom compost.
Collapse
Affiliation(s)
- Jee Hwan Yi
- Department of Agricultural Biotechnology, College of Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea.
| | - Haribalan Perumalsamy
- Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea
| | - Karuppasamy Sankarapandian
- Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea
| | - Byeoung-Ryeol Choi
- Crop Protection Division, Department of Crop Life Safety, National Academy of Agricultural Science, Rural Development Administration, Wanju 565-851, Jeollabuk-do, 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.
| |
Collapse
|
27
|
Kim JR, Perumalsamy H, Kwon MJ, Chae SU, Ahn YJ. Toxicity of hiba oil constituents and spray formulations to American house dust mites and copra mites. Pest Manag Sci 2015; 71:737-743. [PMID: 24916027 DOI: 10.1002/ps.3843] [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: 02/19/2014] [Revised: 05/26/2014] [Accepted: 06/02/2014] [Indexed: 06/03/2023]
Abstract
BACKGROUND Dermatophagoides farinae and Tyrophagus putrescentiae are recognised as an important source of allergens. An assessment was made of the toxicity of hiba, Thujopsis dolabrata var. hondai, oil and 13 organic compounds and the control efficacy of four experimental spray formulations containing the oil (5-30 g L(-1) spray) against both mite species. RESULTS In a contact + fumigant mortality bioassay, (-)-thujopsene was the most toxic constituent against D. farinae and T. putrescentiae (24 h LC50 9.82 and 10.92 µg cm(-2)), and the toxicity of the compound was nearly identical to that of benzyl benzoate (9.33 and 10.14 µg cm(-2)). The toxicity was more pronounced in carvacrol, (+)-terpinen-4-ol, β-thujaplicin, (-)-terpinen-4-ol, cedrol and α-terpineol (LC50 12.05-15.20 and 12.74-16.48 µg cm(-2)) than in N,N-diethyl-3-methylbenzamide (LC50 35.53 and 38.42 µg cm(-2)) against both mite species. The hiba oil 30 g L(-1) spray and commercial permethrin (cis:trans 25:75) 2.5 g L(-1) spray treatment resulted in 100 and 11% mortality against the two mite species respectively. In vapour-phase mortality tests, the two compounds were consistently more toxic in closed versus open containers, indicating that toxicity was achieved mainly through the action of vapour. CONCLUSION Reasonable mite control in indoor environments can be achieved by a spray formulation containing the 30 g L(-1) hiba oil as a potential contact-action fumigant.
Collapse
Affiliation(s)
- Jun-Ran Kim
- Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
| | | | | | | | | |
Collapse
|
28
|
Perumalsamy H, Jang MJ, Kim JR, Kadarkarai M, Ahn YJ. Larvicidal activity and possible mode of action of four flavonoids and two fatty acids identified in Millettia pinnata seed toward three mosquito species. Parasit Vectors 2015; 8:237. [PMID: 25928224 PMCID: PMC4410478 DOI: 10.1186/s13071-015-0848-8] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Accepted: 04/08/2015] [Indexed: 11/29/2022] Open
Abstract
Background Aedes aegypti and Aedes albopictus and Culex pipiens pallens mosquitoes transmit dengue fever and West Nile virus diseases, respectively. This study was conducted to determine the toxicity and mechanism of action of four flavonoids and two fatty acids from Millettia pinnata (Fabaceae) seed as well as six pure fatty acids and four fatty acid esters toward third instar larvae from insecticide-susceptible C. pipiens pallens and A. aegypti as well as wild A. albopictus. Efficacy of 12 experimental liquid formulations containing M. pinnata seed methanol extract and hydrodistillate (0.5–10.0% liquids) was also assessed. Methods The contact toxicities of all compounds and 12 formulations were compared with those of two larvicides, temephos and fenthion and the commercial temephos 200 g/L emulsifiable concentrate (EC). The possible mode of larvicidal action of the constituents was elucidated using biochemical methods. Larval mortality and cAMP level were analyzed by the Bonferroni multiple-comparison method. Results Potent toxicity was produced by karanjin, oleic acid, karanjachromene, linoleic acid, linolenic acid, pongamol, pongarotene, and elaidic acid toward C. pipiens pallens larvae (24 h LC50, 14.61–28.22 mg/L) and A. aegypti larvae (16.13–37.61 mg/L). Against wild A. albopictus larvae, oleic acid (LC50, 18.79 mg/L) and karanjin (35.26 mg/L) exhibited potent toxicity. All constituents were less toxic than either temephos or fenthion. Structure–activity relationship indicates that the degree of saturation, the side chain length, and the geometric isomerism of fatty acids appear to play a role in determining the fatty acid toxicity. Acetylcholinesterase (AChE) is the main site of action of the flavonoids, oleic acid, and palmitic acid. The mechanism of larvicidal action of elaidic acid, arachidic acid, and behenic acid might be due to interference with the octopaminergic system. Linoleic acid and linolenic acid might act on both AChE and octopaminergic receptor. M. pinnata seed extract or hydrodistillate applied as 10% liquid provided 100% mortality toward the three mosquito species larvae and the efficacy of the liquids was comparable to that of temephos 200 g/L EC. Conclusion Further studies will warrant possible applications of M. pinnata seed-derived products as potential larvicides for the control of mosquito populations. Electronic supplementary material The online version of this article (doi:10.1186/s13071-015-0848-8) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Haribalan Perumalsamy
- Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 151-921, Republic of Korea.
| | - Myung Jin Jang
- Department of Agricultural Biotechnology, Seoul National University, Seoul, 151-921, Republic of Korea.
| | - Jun-Ran Kim
- National Academy of Agricultural Science, Rural Development Administration, Wanju, 565-851, Jeollabuk-do, Republic of Korea.
| | - Murugan Kadarkarai
- Department of Zoology, Bharathiar University, Coimbatore, 641046, Tamil Nadu, India.
| | - Young-Joon Ahn
- Department of Agricultural Biotechnology, Seoul National University, Seoul, 151-921, Republic of Korea.
| |
Collapse
|
29
|
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.
Collapse
Affiliation(s)
- Seon-Mi Seo
- Lifetree Biotech Co., Ltd. , Maesonggosaek-ro, Kwonsun-gu, Suwon, Gyeonggido 441-813, Republic of Korea
| | | | | | | | | |
Collapse
|
30
|
Kawaguchi H, Kim M, Ishida M, Ahn YJ, Yamamoto T, Yamaoka R, Kozuka M, Goto K, Takahashi S. Several Antifeedants from Phellodendron amurense against Reticulitermes speratus. ACTA ACUST UNITED AC 2014. [DOI: 10.1080/00021369.1989.10869702] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Hitoshi Kawaguchi
- Central Research Laboratories, Taiyo Kagaku Co., Ltd., 1–3, Takaramachi, Yokkaichi, Mie 510, Japan
| | - Mujo Kim
- Central Research Laboratories, Taiyo Kagaku Co., Ltd., 1–3, Takaramachi, Yokkaichi, Mie 510, Japan
| | - Munetaka Ishida
- Central Research Laboratories, Taiyo Kagaku Co., Ltd., 1–3, Takaramachi, Yokkaichi, Mie 510, Japan
| | - Young-Joon Ahn
- Central Research Laboratories, Taiyo Kagaku Co., Ltd., 1–3, Takaramachi, Yokkaichi, Mie 510, Japan
| | | | - Ryohei Yamaoka
- Department of Applied Biology, Kyoto Institute of Technology, Kyoto, Japan
| | - Mutsuo Kozuka
- Department of Pharmacognosy, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Katumi Goto
- Department of Pharmacognosy, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Shozo Takahashi
- Pesticide Research Institute, Kyoto University, Kyoto, Japan
| |
Collapse
|
31
|
|
32
|
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.
Collapse
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.
| |
Collapse
|
33
|
Chae SC, Kwon YH, Min KI, Kim HS, Kim NJ, Kim JR, Son BG, Ahn YJ. Predation and control efficacies of Misgurnus mizolepis (Cypriniformes: Cobitidae) toward Culex pipiens molestus (Diptera: Culicidae) and fish toxicity of temephos in laboratory and septic tank conditions. J Med Entomol 2014; 51:817-823. [PMID: 25118414 DOI: 10.1603/me13203] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Culex pipiens molestus Forskal (Diptera: Culicidae) is the dominant mosquito species in septic tanks in South Korea. An assessment was made of the biological control potential of mud loaches, Misgurnus mizolepis Günther (Cypriniformes: Cobitidae), toward Cx. p. molestus larvae in laboratory and septic tanks. Results were compared with those of temephos 20% emulsifiable concentrate. In laboratory tests, all mud loaches survived on sedimentation chamber- and effluent chamber-collected water of aerobic septic tanks (ASTs), whereas all mud loaches died within 3-12 h after introduction into sedimentation chamber- and effluent chamber-collected water of anaerobic septic tanks, Gill hyperplasia and hemorrhages at the bases of pectoral fins were detected in all dead mud loaches. These appeared to have been caused by bacterial disease, rather than the physical and chemical characteristics of the septic tank water. A mud loach consumed an average range of 1,072-1,058 larvae of Cx. p. molestus in the AST water at 24 h. At the manufacturer's recommended rate (10 ml/ton) in the AST water, the temephos formulation did not cause fish mortality. In the AST experiment, predation of mosquito larvae by mud loaches at a release rate of one fish per 900 mosquito larvae resulted in complete mosquito control from the third day after treatment throughout the 18-wk survey period, compared with temephos 20% emulsifiable concentrate-treated AST water (reduction rate, 40% at 28 days after treatment). Reasonable mosquito control in aerobic septic tanks can be achieved by mosquito breeding season stocking of a rate of one mud loach per 900 mosquito larvae.
Collapse
|
34
|
Chang KS, Shin EH, Yoo DH, Ahn YJ. Enhanced toxicity of binary mixtures of Bacillus thuringiensis subsp. israelensis and three essential oil major constituents to wild Anopheles sinensis (Diptera: Culicidae) and Aedes albopictus (Diptera: Culicidae). J Med Entomol 2014; 51:804-810. [PMID: 25118412 DOI: 10.1603/me13128] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
An assessment was made of the toxicity of 12 insecticides and three essential oils as well as Bacillus thuringiensis subsp. israelensis (Bti) alone or in combination with the oil major constituents (E)-anethole (AN), (E) -cinnamaldehyde (CA), and eugenol (EU; 1:1 ratio) to third instars of bamboo forest-collected Aedes albopictus (Skuse) and rice paddy field-collected Anopheles sinensis Wiedemann. An. sinensis larvae were resistant to various groups of the tested insecticides. Based on 24-h LC50 values, binary mixtures of Bti and CA, AN, or EU were significantly more toxic against Ae. albopictus larvae (0.0084, 0.0134, and 0.0237 mg/liter) and An. sinensis larvae (0.0159, 0.0388, and 0.0541 mg/liter) than either Bti (1.7884 and 2.1681 mg/liter) or CA (11.46 and 18.56 mg/liter), AN (16.66 and 25.11 mg/liter), or EU (24.60 and 31.09 mg/liter) alone. As judged by cotoxicity coefficient (CC) and synergistic factor (SF), the three binary mixtures operated in a synergy pattern (CC, 140.7-368.3 and SF, 0.0007-0.0010 for Ae. albopictus; CC, 75.1-245.3 and SF, 0.0008-0.0017 for An. sinensis). Global efforts to reduce the level of highly toxic synthetic insecticides in the aquatic environment justify further studies on the binary mixtures of Bti and essential oil constituents described, in particular CA, as potential larvicides for the control of malaria vector mosquito populations.
Collapse
|
35
|
Park SW, Kwon MJ, Yoo JY, Choi HJ, Ahn YJ. Antiviral activity and possible mode of action of ellagic acid identified in Lagerstroemia speciosa leaves toward human rhinoviruses. BMC Complement Altern Med 2014; 14:171. [PMID: 24885569 PMCID: PMC4052798 DOI: 10.1186/1472-6882-14-171] [Citation(s) in RCA: 38] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Accepted: 05/21/2014] [Indexed: 12/02/2022]
Abstract
BACKGROUND Human rhinoviruses (HRVs) are responsible for more than half of all cases of the common cold and cause billions of USD annually in medical visits and school and work absenteeism. An assessment was made of the cytotoxic and antiviral activities and possible mode of action of the tannin ellagic acid from the leaves of Lagerstroemia speciosa toward HeLa cells and three rhinoviruses, HRV-2, -3, and -4. METHODS The antiviral property and mechanism of action of ellagic acid were evaluated using a sulforhodamine B assay and real-time reverse transcription-PCR (RT-PCR) with SYBR Green dye. Results were compared with those of the currently used broad-spectrum antiviral agent, ribavirin. RESULTS As judged by 50% inhibitory concentration values, natural ellagic acid was 1.8, 2.3, and 2.2 times more toxic toward HRV-2 (38 μg/mL), HRV-3 (31 μg/mL), and HRV-4 (29 μg/mL) than ribavirin, respectively. The inhibition rate of preincubation with 50 μg/mL ellagic acid was 17%, whereas continuous presence of ellagic acid during infection led to a significant increase in the inhibition (70%). Treatment with 50 μg/mL ellagic acid considerably suppressed HRV-4 infection only when added just after the virus inoculation (0 h) (87% inhibition), but not before -1 h or after 1 h or later (<20% inhibition). These findings suggest that ellagic acid does not interact with the HRV-4 particles and may directly interact with the human cells in the early stage of HRV infections to protect the cells from the virus destruction. Furthermore, RT-PCR analysis revealed that 50 μg/mL ellagic acid strongly inhibited the RNA replication of HRV-4 in HeLa cells, suggesting that ellagic acid inhibits virus replication by targeting on cellular molecules, rather than virus molecules. CONCLUSIONS Global efforts to reduce the level of antibiotics justify further studies on L. speciosa leaf-derived materials containing ellagic acid as potential anti-HRV products or a lead molecule for the prevention or treatment of HRV infection.
Collapse
Affiliation(s)
- Sang Wook Park
- Interdisciplinary Program in Agricultural Biotechnology, College of Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea
| | - Min Jung Kwon
- Department of Agricultural Biotechnology, Seoul National University, Seoul 151-921, Republic of Korea
| | - Ji Young Yoo
- Department of Agricultural Biotechnology, Seoul National University, Seoul 151-921, Republic of Korea
| | - Hwa-Jung Choi
- Department of Infection Biology, Zoonosis Research Center, Wonkwang University School of Medicine, Iksan 570-749, Jeollabuk-do, Republic of Korea
| | - Young-Joon Ahn
- Department of Agricultural Biotechnology, Seoul National University, Seoul 151-921, Republic of Korea
| |
Collapse
|
36
|
Perumalsamy H, Kim JY, Kim JR, Hwang KNR, Ahn YJ. Toxicity of basil oil constituents and related compounds and the efficacy of spray formulations to Dermatophagoides farinae (Acari: Pyroglyphidae). J Med Entomol 2014; 51:650-657. [PMID: 24897858 DOI: 10.1603/me13235] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Pyroglyphid house dust mites are the most common cause of allergic symptoms in humans. An assessment was made of the toxicity of basil, Ocimum basilicum L, essential oil, 11 basil oil constituents, seven structurally related compounds, and another 22 previously known basil oil constituents to adult American house dust mites, Dermatophagoides farinae Hughes. The efficacy of four experimental spray formulations containing basil oil (1, 2, 3, and 4% sprays) was also assessed. Results were compared with those of two conventional acaricides benzyl benzoate and N,N-diethyl-3-methylbenzamide. The active principles of basil oil were determined to be citral, alpha-terpineol, and linalool. Citral (24 h LC50, 1.13 microg/cm2) and menthol (1.69 microg/cm2) were the most toxic compounds, followed by methyl eugenol (5.78 microg/cm2). These compounds exhibited toxicity greater than benzyl benzoate (LC50, 8.41 microg/cm2) and N,N-diethyl-3-methylbenzamide (37.67 microg/cm2). Potent toxicity was also observed with eugenol, menthone, spathulenol, alpha-terpineol, nerolidol, zerumbone, and nerol (LC50, 12.52-21.44 microg/cm2). Interestingly, the sesquiterpenoid alpha-humulene, lacking only the carbonyl group present in zerumbone, was significantly less effective than zerumbone, indicating that the alpha,beta-unsaturated carbonyl group of zerumbone is a prerequisite component for toxicity. These compounds were consistently more toxic in closed versus open containers, indicating that their mode of delivery was largely a result of vapor action. Basil oil applied as 3 and 4% sprays provided 97 and 100% mortality against the mites, respectively, whereas permethrin (cis:trans, 25:75) 2.5 g/liter spray treatment resulted in 17% mortality. Our results indicate that practical dust mite control in indoor environments can be achieved by basil oil spray formulations (3 and 4% sprays) as potential contact-action fumigants.
Collapse
|
37
|
Lee HK, Song HE, Lee HB, Kim CS, Koketsu M, Thi My Ngan L, Ahn YJ. Growth inhibitory, bactericidal, and morphostructural effects of dehydrocostus lactone from Magnolia sieboldii Leaves on antibiotic-susceptible and -resistant strains of Helicobacter pylori. PLoS One 2014; 9:e95530. [PMID: 24747984 PMCID: PMC3991664 DOI: 10.1371/journal.pone.0095530] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Accepted: 03/21/2014] [Indexed: 01/25/2023] Open
Abstract
Helicobacter pylori is associated with various diseases of the upper gastrointestinal tract, such as gastric inflammation and duodenal and gastric ulcers. The aim of the study was to assess anti-H. pylori effects of the sesquiterpene lactone dehydrocostus lactone (DCL) from Magnolia sieboldii leaves, compared to commercial pure DCL, two previously known sesquiterpene lactones (costunolide and parthenolide), (-)-epigallocatechin gallate, and four antibiotics. The antibacterial activity of natural DCL toward antibiotic-susceptible H. pylori ATCC 700392 and H. pylori ATCC 700824 strains (MIC, 4.9 and 4.4 mg/L) was similar to that of commercial DCL and was more effective than costunolide, parthenolide, and EGCG. The activity of DCL was slightly lower than that of metronidazole (MIC, 1.10 and 1.07 mg/L). The antibacterial activity of DCL was virtually identical toward susceptible and resistant strains, even though resistance to amoxicillin (MIC, 11.1 mg/L for PED 503G strain), clarithromycin (49.8 mg/L for PED 3582GA strain), metronidazole (21.6 mg/L for H. pylori ATCC 43504 strain; 71.1 mg/L for 221 strain), or tetracycline (14.2 mg/L for B strain) was observed. This finding indicates that DCL and the antibiotics do not share a common mode of action. The bactericidal activity of DCL toward H. pylori ATCC 43504 was not affected by pH values examined (4.0-7.0). DCL caused considerable conversion to coccoid form (94 versus 49% at 8 and 4 mg/L of DCL for 48 h). The Western blot analysis revealed that urease subunits (UreA and UreB) of H. pylori ATCC 43504 were not affected by 10 mM of DCL, whereas UreA monomer band completely disappeared at 0.1 mM of (-)-epigallocatechin gallate. Global efforts to reduce the level of antibiotics justify further studies on M. sieboldii leaf-derived materials containing DCL as potential antibacterial products or a lead molecule for the prevention or eradication of drug-resistant H. pylori.
Collapse
Affiliation(s)
- Hyun-Kyung Lee
- Interdisciplinary Program in Agricultural Biotechnology, College of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
| | - Ha Eun Song
- Biomodulation Major, Department of Agricultural Biotechnology, Seoul National University, Seoul, South Korea
| | - Haeng-Byung Lee
- Interdisciplinary Program in Agricultural Biotechnology, College of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
| | - Cheol-Soo Kim
- Halla Botanical Garden, Jeju City, Jeju, South Korea
| | - Mamoru Koketsu
- Department of Chemistry and Biomolecular Science, Gifu University, Gifu, Japan
| | - Luong Thi My Ngan
- Department of Plant Biotechnology and Biotransformation, Faculty of Biology, Ho Chi Minh City University of Science, Vietnam National University, Ho Chi Minh City, Vietnam
- * E-mail: (Y-JA); (LTMN)
| | - Young-Joon Ahn
- Biomodulation Major, Department of Agricultural Biotechnology, Seoul National University, Seoul, South Korea
- * E-mail: (Y-JA); (LTMN)
| |
Collapse
|
38
|
Wang X, Kim JR, Lee SB, Kim YJ, Jung MY, Kwon HW, Ahn YJ. Effects of curcuminoids identified in rhizomes of Curcuma longa on BACE-1 inhibitory and behavioral activity and lifespan of Alzheimer's disease Drosophila models. Altern Ther Health Med 2014; 14:88. [PMID: 24597901 PMCID: PMC3946151 DOI: 10.1186/1472-6882-14-88] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2013] [Accepted: 02/25/2014] [Indexed: 01/01/2023]
Abstract
Background Alzheimer’s disease (AD) is the most common type of presenile and senile dementia. The human β-amyloid precursor cleavage enzyme (BACE-1) is a key enzyme responsible for amyloid plaque production, which implicates the progress and symptoms of AD. Here we assessed the anti-BACE-1 and behavioral activities of curcuminoids from rhizomes of Curcuma longa (Zingiberaceae), diarylalkyls curcumin (CCN), demethoxycurcumin (DMCCN), and bisdemethoxycurcumin (BDMCCN) against AD Drosophila melanogaster models. Methods Neuro-protective ability of the curcuminoids was assessed using Drosophila melanogaster model system overexpressing BACE-1 and its substrate APP in compound eyes and entire neurons. Feeding and climbing activity, lifespan, and morphostructural changes in fly eyes also were evaluated. Results BDMCCN has the strongest inhibitory activity toward BACE-1 with 17 μM IC50, which was 20 and 13 times lower than those of CCN and DMCCN respectively. Overexpression of APP/BACE-1 resulted in the progressive and measurable defects in morphology of eyes and locomotion. Remarkably, supplementing diet with either 1 mM BDMCCN or 1 mM CCN rescued APP/BACE1-expressing flies and kept them from developing both morphological and behavioral defects. Our results suggest that structural characteristics, such as degrees of saturation, types of carbon skeleton and functional group, and hydrophobicity appear to play a role in determining inhibitory potency of curcuminoids on BACE-1. Conclusion Further studies will warrant possible applications of curcuminoids as therapeutic BACE-1 blockers.
Collapse
|
39
|
Park D, Jung JW, Lee MO, Lee SY, Kim B, Jin HJ, Kim J, Ahn YJ, Lee KW, Song YS, Hong S, Womack JE, Kwon HW. Functional characterization of naturally occurring melittin peptide isoforms in two honey bee species, Apis mellifera and Apis cerana. Peptides 2014; 53:185-93. [PMID: 24512991 DOI: 10.1016/j.peptides.2014.01.026] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Revised: 01/20/2014] [Accepted: 01/21/2014] [Indexed: 12/21/2022]
Abstract
Insect-derived antimicrobial peptides (AMPs) have diverse effects on antimicrobial properties and pharmacological activities such as anti-inflammation and anticancer properties. Naturally occurring genetic polymorphism have a direct and/or indirect influence on pharmacological effect of AMPs, therefore information on single nucleotide polymorphism (SNP) occurring in natural AMPs provides an important clue to therapeutic applications. Here we identified nucleotide polymorphisms in melittin gene of honey bee populations, which is one of the potent AMP in bee venoms. We found that the novel SNP of melittin gene exists in these two honey bee species, Apis mellifera and Apis cerana. Nine polymorphisms were identified within the coding region of the melittin gene, of which one polymorphism that resulted in serine (Ser) to asparagine (Asp) substitution that can potentially effect on biological activities of melittin peptide. Serine-substituted melittin (Mel-S) showed more cytotoxic effect than asparagine-substituted melittin (Mel-N) against E. coli. Also, Mel-N and Mel-S had different inhibitory effects on the production of inflammatory factors such as IL-6 and TNF-α in BV-2 cells. Moreover, Mel-S showed stronger cytotoxic activities than Mel-N peptide against two human ovarian cancer cell lines. Using carbon nanotube-based transistor, we here characterized that Mel-S interacted with small unilamellar liposomes more strongly than Mel-N. Taken together, our present study demonstrates that there exist different characteristics of the gene frequency and the biological activities of the melittin peptide in two honey bee species, Apis mellifera and A. cerana.
Collapse
Affiliation(s)
- Doori Park
- WCU Biomodulation Major, Department of Agricultural Biotechnology, College of Agriculture & Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea
| | - Je Won Jung
- WCU Biomodulation Major, Department of Agricultural Biotechnology, College of Agriculture & Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea
| | - Mi Ok Lee
- Department of Veterinary Pathobiology, Texas A&M University, College Station, TX 77843, United States
| | - Si Young Lee
- WCU Biomodulation Major, Department of Agricultural Biotechnology, College of Agriculture & Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea
| | - Boyun Kim
- WCU Biomodulation Major, Department of Agricultural Biotechnology, College of Agriculture & Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea
| | - Hye Jun Jin
- Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Republic of Korea
| | - Jiyoung Kim
- WCU Biomodulation Major, Department of Agricultural Biotechnology, College of Agriculture & Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea
| | - Young-Joon Ahn
- WCU Biomodulation Major, Department of Agricultural Biotechnology, College of Agriculture & Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea
| | - Ki Won Lee
- WCU Biomodulation Major, Department of Agricultural Biotechnology, College of Agriculture & Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea
| | - Yong Sang Song
- WCU Biomodulation Major, Department of Agricultural Biotechnology, College of Agriculture & Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea
| | - Seunghun Hong
- Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Republic of Korea
| | - James E Womack
- Department of Veterinary Pathobiology, Texas A&M University, College Station, TX 77843, United States
| | - Hyung Wook Kwon
- WCU Biomodulation Major, Department of Agricultural Biotechnology, College of Agriculture & Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea.
| |
Collapse
|
40
|
Chae SH, Kim SI, Yeon SH, Perumalsamy H, Ahn YJ. Fumigant toxicity of summer savory and lemon balm oil constituents and efficacy of spray formulations containing the oils to B- and neonicotinoid-resistant Q-biotypes of Bemisia tabaci (Homoptera: Aleyrodidae). J Econ Entomol 2014; 107:286-292. [PMID: 24665712 DOI: 10.1603/ec13287] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
An assessment was made of the fumigant toxicity of 36 constituents from lemon balm oil (LBO) and summer savory oil (SSO) and another additional nine previously identified compounds of the oils, as well as of the control efficacy of four experimental spray formulations containing individual oils (0.5 and 0.1% sprays) and spinosad 10% suspension concentrate (SC) to females from B- and neonicotinoid-resistant Q-biotypes of Bemisia tabaci (Gennadius) (Homoptera: Aleyrodidae). Based on 24-h LC50 values, Q-biotype females (0.20 microg/cm3) were 40 times less susceptible to dichlorvos than B-biotype females (0.005 microg/cm3). Thymol (LC50, 0.35 microg/cm3) and carvacrol (0.56 microg/cm3) were the most toxic compounds toward Q-biotype females, followed by (1S)-(-)-borneol, alpha-terpineol, nerol, linalool, and carvone (1.06-1.38 microg/cm3). The toxicity of these compounds was virtually identical toward both biotype females, indicating that the terpenoids and the insecticides (neonicotinoids and dichlorvos) do not share a common mode of action or elicit cross-resistance. The 0.5% spray of LBO, SSO, and spinosad 10% SC resulted in >90% mortality toward both biotype females. Global efforts to reduce the level of toxic synthetic insecticides in the agricultural environment justify further studies on LBO- and SSO-derived materials as potential contact-action fumigants for the control of B. tabaci populations.
Collapse
|
41
|
Chang YR, Ahn YJ, Jang JY, Kang MJ, Kwon W, Jung WH, Kim SW. Percutaneous cholecystostomy for acute cholecystitis in patients with high comorbidity and re-evaluation of treatment efficacy. Surgery 2014; 155:615-22. [PMID: 24548617 DOI: 10.1016/j.surg.2013.12.026] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Accepted: 12/26/2013] [Indexed: 02/06/2023]
Abstract
BACKGROUND In high-risk and unfit-for-surgery patients with acute cholecystitis (AC), treatment options are controversial. Few studies have reported the results of long-term follow-up. This study aimed to evaluate the clinical course of patients after removal of the percutaneous cholecystostomy (PC) catheter in high-risk patients with AC, time interval to relapse, and factors influencing relapse. METHODS From 2000 to 2011, 183 patients with AC underwent PC and catheter removal in Seoul National University Hospital and Boramae Hospital, Korea. Sixty cases were reviewed retrospectively after excluding cases with intended interval cholecystectomy, malignant biliary obstruction, loss to follow-up, and insufficient follow-up information. RESULTS The mean age was 68.6 ± 13.8 years, and the mean Karnofsky performance score was 24.8 ± 9.7. After insertion of a PC catheter, symptom resolution and improvement on imaging were achieved in 95% and 97.9% of patients, respectively. Laboratory values were also improved (P < .01). There was no mortality during admission; 2 patients (3.3%) experienced complications during removal of the PC catheter. Relapse was observed in 7 patients (11.7%) during a median follow-up of 38.1 ± 24.8 months. There were no differences in clinical, laboratory, or imaging findings between relapsing and nonrelapsing patients. Therefore, prediction of relapse was not possible. CONCLUSION Among high-risk patients with AC, 88.3% were managed with PC without relapse within a median follow-up period of 38.1 months, despite radiologically severe AC in some patients. We conclude that a temporary PC can be a first-line treatment for AC without interval cholecystectomy.
Collapse
Affiliation(s)
- Ye Rim Chang
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - Young-Joon Ahn
- Department of Surgery, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul, Korea
| | - Jin-Young Jang
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea.
| | - Mee Joo Kang
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - Wooil Kwon
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - Woo Hyun Jung
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - Sun-Whe Kim
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
| |
Collapse
|
42
|
Hieu TT, Jung J, Kim SI, Ahn YJ, Kwon HW. Behavioural and electroantennogram responses of the stable fly (Stomoxys calcitrans L.) to plant essential oils and their mixtures with attractants. Pest Manag Sci 2014; 70:163-172. [PMID: 23564737 DOI: 10.1002/ps.3547] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [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: 10/24/2012] [Revised: 02/21/2013] [Accepted: 04/05/2013] [Indexed: 06/02/2023]
Abstract
BACKGROUND Insect olfactory organs possess many olfactory receptor neurons, which detect many different sets of odorants in nature. In order to feed on blood meals, stable flies locate host animals and humans using chemical cues such as 1-octen-3-ol and butyric acid. In the present study, behavioural and electroantennogram (EAG) response patterns to repellent volatiles from essential oils (EOs) of Zanthoxylum piperitum and Z. armatum in combination with the attractants were investigated. RESULTS Components of the EOs such as cuminaldehyde, citronellal, neral, linalool, linalool oxide, terpinen-4-ol, 1,8-cineole, and piperitone induced remarkable repellent behaviours in the stable fly. EAG responses in the fly antenna to these chemicals showed a dose-dependent manner. The patterns of behavioural and EAG responses were significantly altered depending on the ratios of 1-octen-3-ol or butyric acid to the EOs or compounds in the air mixtures. CONCLUSION The present study demonstrated that the Zanthoxylum EOs decreased the levels of response of flight behaviours of the stable fly towards host volatile compounds. The combinations of odorant mixtures of the attractants with the EOs and their components affect the representation of behavioural and EAG responses of the flies. The summation and integration patterns of olfactory responses measured by the EAG indicated that the peripheral olfactory networks in antennae could process the odorant complexity of different odorant mixtures between attractants and repellents.
Collapse
Affiliation(s)
- Trung Tran Hieu
- Department of Agricultural Biotechnology, Seoul National University, Seoul, 151-921, Republic of Korea
| | | | | | | | | |
Collapse
|
43
|
Perumalsamy H, Kim JR, Oh SM, Jung JW, Ahn YJ, Kwon HW. Novel histopathological and molecular effects of natural compound pellitorine on larval midgut epithelium and anal gills of Aedes aegypti. PLoS One 2013; 8:e80226. [PMID: 24260359 PMCID: PMC3832413 DOI: 10.1371/journal.pone.0080226] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Accepted: 10/01/2013] [Indexed: 11/19/2022] Open
Abstract
The yellow fever mosquito, Aedes aegypti, is a vector for transmitting dengue fever and yellow fever. In this study, we assessed the histopathological and molecular effects of pellitorine, an isobutylamide alkaloid, on the third instar of Ae. aegypti larvae. At 5 mg/l concentration of pellitorine, the whole body of the treated larvae became dark in color, particularly damaged thorax and abdominal regions. Pellitorine was targeted mainly on midgut epithelium and anal gills, indicating variably dramatic degenerative responses of the midgut through a sequential epithelial disorganization. The anterior and posterior midgut was entirely necrosed, bearing only gut lumen residues inside the peritrophic membranes. Pellitorine caused comprehensive damage of anal gill cells and branches of tracheole and debris was found in hemolymph of the anal gills. RT-PCR analysis indicates that the compound inhibited gene expression encoding V-type H+-ATPase and aquaporine 4 after treatment with 2.21 mg/l pellitorine. These results verify that pellitorine merits further study as a potential larvicide with a specific target site and a lead molecule for the control of mosquito populations.
Collapse
Affiliation(s)
- Haribalan Perumalsamy
- Research Institute for Agriculture and Life Science, Seoul National University, Seoul, Republic of Korea
- WCU Biomodulation Major, Department of Agricultural Biotechnology, Seoul National University, Seoul, Republic of Korea
| | - Jun-Ran Kim
- Research Institute for Agriculture and Life Science, Seoul National University, Seoul, Republic of Korea
- WCU Biomodulation Major, Department of Agricultural Biotechnology, Seoul National University, Seoul, Republic of Korea
| | - Sang Mi Oh
- WCU Biomodulation Major, Department of Agricultural Biotechnology, Seoul National University, Seoul, Republic of Korea
| | - Je Won Jung
- WCU Biomodulation Major, Department of Agricultural Biotechnology, Seoul National University, Seoul, Republic of Korea
| | - Young-Joon Ahn
- WCU Biomodulation Major, Department of Agricultural Biotechnology, Seoul National University, Seoul, Republic of Korea
- * E-mail: (Y-JA); (HWK)
| | - Hyung Wook Kwon
- WCU Biomodulation Major, Department of Agricultural Biotechnology, Seoul National University, Seoul, Republic of Korea
- * E-mail: (Y-JA); (HWK)
| |
Collapse
|
44
|
Jung JW, Kim JH, Pfeiffer R, Ahn YJ, Page TL, Kwon HW. Neuromodulation of olfactory sensitivity in the peripheral olfactory organs of the American cockroach, Periplaneta americana. PLoS One 2013; 8:e81361. [PMID: 24244739 PMCID: PMC3828268 DOI: 10.1371/journal.pone.0081361] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Accepted: 10/11/2013] [Indexed: 12/19/2022] Open
Abstract
Olfactory sensitivity exhibits daily fluctuations. Several studies have suggested that the olfactory system in insects is modulated by both biogenic amines and neuropeptides. However, molecular and neural mechanisms underlying olfactory modulation in the periphery remain unclear since neuronal circuits regulating olfactory sensitivity have not been identified. Here, we investigated the structure and function of these signaling pathways in the peripheral olfactory system of the American cockroach, Periplaneta americana, utilizing in situ hybridization, qRT-PCR, and electrophysiological approaches. We showed that tachykinin was co-localized with the octopamine receptor in antennal neurons located near the antennal nerves. In addition, the tachykinin receptor was found to be expressed in most of the olfactory receptor neurons in antennae. Functionally, the effects of direct injection of tachykinin peptides, dsRNAs of tachykinin, tachykinin receptors, and octopamine receptors provided further support for the view that both octopamine and tachykinin modulate olfactory sensitivity. Taken together, these findings demonstrated that octopamine and tachykinin in antennal neurons are olfactory regulators in the periphery. We propose here the hypothesis that octopamine released from neurons in the brain regulates the release of tachykinin from the octopamine receptor neurons in antennae, which in turn modulates the olfactory sensitivity of olfactory receptor neurons, which house tachykinin receptors.
Collapse
Affiliation(s)
- Je Won Jung
- WCU Biomodulation Major, Department of Agricultural Biotechnology, College of Agriculture & Life Sciences, Seoul, Republic of Korea
| | - Jin-Hee Kim
- WCU Biomodulation Major, Department of Agricultural Biotechnology, College of Agriculture & Life Sciences, Seoul, Republic of Korea
| | - Rita Pfeiffer
- Department of Biological Sciences, Vanderbilt University, Nashville, Tennessee, United States of America
| | - Young-Joon Ahn
- WCU Biomodulation Major, Department of Agricultural Biotechnology, College of Agriculture & Life Sciences, Seoul, Republic of Korea
| | - Terry L. Page
- Department of Biological Sciences, Vanderbilt University, Nashville, Tennessee, United States of America
| | - Hyung Wook Kwon
- WCU Biomodulation Major, Department of Agricultural Biotechnology, College of Agriculture & Life Sciences, Seoul, Republic of Korea
- * E-mail:
| |
Collapse
|
45
|
Lee JH, Kim JR, Koh YR, Ahn YJ. Contact and fumigant toxicity of Pinus densiflora needle hydrodistillate constituents and related compounds and efficacy of spray formulations containing the oil to Dermatophagoides farinae. Pest Manag Sci 2013; 69:696-702. [PMID: 23109302 DOI: 10.1002/ps.3421] [Citation(s) in RCA: 2] [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] [Received: 04/26/2012] [Revised: 07/01/2012] [Accepted: 09/06/2012] [Indexed: 06/01/2023]
Abstract
BACKGROUND The toxicity of red pine needle hydrodistillate (RPN-HD), 19 RPN-HD constituents and another 12 structurally related compounds and the control efficacy of four experimental spray formulations containing RPN-HD (0.5. 1, 2 and 3% sprays) to adult Dermatophagoides farinae were evaluated. RESULTS RPN-HD (24 h LC50 , 68.33 µg cm(-2) ) was toxic to mites. Menthol was the most toxic compound (12.69 µg cm(-2) ), and the toxicity of this compound and benzyl benzoate did not differ significantly. High toxicity was also produced by α-terpineol, bornyl acetate, geranyl acetate, thymol, linalyl acetate, terpinyl acetate, citral, linalool and camphor (18.79-36.51 µg cm(-2) ). These compounds were more toxic than either deet or dibutyl phthalate. In vapour-phase mortality tests, these compounds were consistently more toxic in closed versus open containers, indicating that their mode of delivery was largely a result of vapour action. RPN-HD 3% experimental spray provided 95% mortality against adult D. farinae, whereas permethrin (cis:trans, 25:75) 2.5 g L(-1) spray treatment resulted in 0% mortality. CONCLUSION In the light of global efforts to reduce the level of highly toxic synthetic acaricides in indoor environments, RPN-HD and the compounds described merit further study as potential biocides for the control of Dermatophagoides populations as fumigants with contact action.
Collapse
Affiliation(s)
- Ju-Hee Lee
- WCU Biomodulation Major, Department of Agricultural Biotechnology, Seoul National University, Seoul, South Korea
| | | | | | | |
Collapse
|
46
|
Lee DC, Ahn YJ. Laboratory and Simulated Field Bioassays to Evaluate Larvicidal Activity of Pinus densiflora Hydrodistillate, Its Constituents and Structurally Related Compounds against Aedes albopictus, Aedes aegypti and Culex pipiens pallens in Relation to Their Inhibitory Effects on Acetylcholinesterase Activity. Insects 2013; 4:217-29. [PMID: 26464387 PMCID: PMC4553520 DOI: 10.3390/insects4020217] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [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: 04/01/2013] [Revised: 04/24/2013] [Accepted: 04/25/2013] [Indexed: 11/16/2022]
Abstract
The toxicity of Pinus densiflora (red pine) hydrodistillate, its 19 constituents and 28 structurally related compounds against early third-instar larvae of Aedes albopictus (Ae. albopictus), Aedes aegypti (Ae. aegypti) and Culex pipiens palles (Cx. p. pallens) was examined using direct-contact bioassays. The efficacy of active compounds was further evaluated in semi-field bioassays using field-collected larval Cx. p. pallens. Results were compared with those of two synthetic larvicides, temephos and fenthion. In laboratory bioassays, Pinus densiflora hydrodistillate was found to have 24 h LC50 values of 20.33, 21.01 and 22.36 mg/L against larval Ae. albopictus, Ae. aegypti and Cx. p. pallens respectively. Among the identified compounds, thymol, δ-3-carene and (+)-limonene exhibited the highest toxicity against all three mosquito species. These active compounds were found to be nearly equally effective in field trials as well. In vitro bioassays were conducted to examine the acetylcholinesterase (AChE) inhibitory activity of 10 selected compounds. Results showed that there is a noticeable correlation between larvicidal activity and AChE inhibitory activity. In light of global efforts to find alternatives for currently used insecticides against disease vector mosquitoes, Pinus densiflora hydrodistillate and its constituents merit further research as potential mosquito larvicides.
Collapse
Affiliation(s)
- Dong Chan Lee
- International Course, Hankuk Academy of Foreign Studies, Yongin 449-854, Korea.
| | - Young-Joon Ahn
- WCU Biomodulation Major, Department of Agricultural Biotechnology, Seoul National University, Seoul 151-921, Korea.
| |
Collapse
|
47
|
Shin EH, Song BG, Lee IH, Park MY, Ahn YJ, Chang KS. Repellency of cassia bark, eucalyptus, and star anise oils and their major constituents to Leptotrombidium pallidum (Acari: Trombiculidae). J Med Entomol 2013; 50:579-584. [PMID: 23802452 DOI: 10.1603/me12129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Leptotrombidium pallidum (Nagoya, Miyagawa, Mitamura & Tamiya) is a primary vector of Orientia tsutsugamushi (Hyashi), the causative agent of scrub typhus. An assessment is made of the repellency to L. pallidum larvae (chiggers) of cassia bark, eucalyptus, and star anise oils and major constituents (E)-cinnamaldehyde, 1,8-cineole, and (E)-anethole of the corresponding oils. Results were compared with those of conventional repellents DEET (N,N-diethyl-3-methylbenzamide), IR3535 [(ethyl 3-[acetyl(butyl)amino]propanoate)], and permethrin. Based on the median repellent concentration (RC50) values, (E)-cinnamaldehyde, (E)-anethole, cassia bark oil, and star anise oil (RC50, 0.95-1.52 mg/cm2) exhibited significantly more potent repellency than DEET (3.85 mg/cm2). (E)-cinnamaldehyde, (E)-anethole, cassiabark oil, 1,8-cineole, and star anise oil were approximately 43, 16, 11, 8, and 4 times more effective than IR3535 (CC5, 6.51%) as judged by the median climbing distance-disturbing concentration (CC50) values. The median residual duration time of repellency (RT50) was significantly more pronounced in DEET (RT50, 323 min) than in all essential oils and constituents (108-167 min). In the light of global efforts to reduce the level of highly toxic synthetic repellents, the three essential oils and their major constituents described merit further study as potential biorepellents for the control of L. pallidum populations.
Collapse
Affiliation(s)
- E-Hyun Shin
- Division of Medical Entomology, National Institute of Health, Osong 363-951, Chungbuk, South Korea
| | | | | | | | | | | |
Collapse
|
48
|
Zhao XM, Wang ZQ, Shu SH, Wang WJ, Xu HJ, Ahn YJ, Wang M, Hu X. Ethanol and methanol can improve huperzine A production from endophytic Colletotrichum gloeosporioides ES026. PLoS One 2013; 8:e61777. [PMID: 23613930 PMCID: PMC3629160 DOI: 10.1371/journal.pone.0061777] [Citation(s) in RCA: 31] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2012] [Accepted: 03/13/2013] [Indexed: 11/18/2022] Open
Abstract
Huperzine A (HupA) is a plant alkaloid that is of great interest as a therapeutic candidate for the treatment of Alzheimer's disease. However, the current production of HupA from plants in large quantity is unsustainable because the plant resource is scarce and the content of HupA in plants is extremely low. Surprisingly, this compound was recently found to be produced by various endophytic fungi, which are much more controllable than the plants due to simpler genetics and ease of manipulation. However, it might be due to the innate properties of endophytic symbiosis, that production of this chemical in large quantity from endophytes has not yet been put into practice. Endophytic Colletotrichum gloeosporioides ES026 was previously isolated from a HupA producing plant and the fungi also proved to produce HupA. In this study, various fermentation conditions were tried to optimize the production of HupA from C. gloeosporioides ES026. Optimization of these parameters resulted in a 25.58% increase in HupA yield. Potato extracts supplemented with glucose or sucrose but not maltose facilitated HupA producing from the fungi. A final concentration of 0.5–2% ethanol stimulated the growth of fungi while methanol with the same treatment slightly inhibited the growth. However, both methanol and ethanol greatly increased the HupA production with the highest yield of HupA (51.89% increment) coming from ethanol treatment. Further analysis showed that both ethanol and methanol were strong inducers of HupA production, while ethanol was partially used as a carbon source during fermentation. It was noticed that the color of that ethanol treated mycelia gradually became dark while methanol treated ones stayed grey during fermentation. The present study sheds light on the importance of optimizing the fermentation process, which, combined with effective inducers, maximizes production of chemicals of important economic interest from endophytic fungi.
Collapse
Affiliation(s)
- Xin-Mei Zhao
- Institute of Medicinal Plant, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
- College of Life Sciences, Xinyang Normal University, Henan, China
| | - Zhang-Qian Wang
- WCU Biomodulation Major, Department of Agricultural Biotechnology, Seoul National University, Seoul, Republic of Korea
| | - Shao-Hua Shu
- Institute of Medicinal Plant, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Wen-Juan Wang
- Institute of Medicinal Plant, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Hai-Jie Xu
- Institute of Medicinal Plant, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Young-Joon Ahn
- WCU Biomodulation Major, Department of Agricultural Biotechnology, Seoul National University, Seoul, Republic of Korea
| | - Mo Wang
- Institute of Medicinal Plant, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
- * E-mail: (MW); (XH)
| | - Xuebo Hu
- Institute of Medicinal Plant, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
- * E-mail: (MW); (XH)
| |
Collapse
|
49
|
Ahn YJ, Jeon YJ, Shin SY. Cell Selectivity and Anti-inflammatory Activity of a Novel Tritrpticin Analog Containing Homo-tryptophan Peptoid Residues. B KOREAN CHEM SOC 2013. [DOI: 10.5012/bkcs.2013.34.3.963] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
50
|
Jang JY, Yoon YS, Kang MJ, Kwon W, Park JW, Chang YR, Ahn YJ, Cho JY, Han HS, Kim SW. Laparoscopic excision of a choledochal cyst in 82 consecutive patients. Surg Endosc 2012; 27:1648-52. [PMID: 23239299 DOI: 10.1007/s00464-012-2646-0] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2012] [Accepted: 09/29/2012] [Indexed: 11/30/2022]
Abstract
INTRODUCTION Despite it being a benign disease, a choledochal cyst must be removed with the gallbladder (GB) due to the risk of cancer in the biliary tract. Most patients are young females or children, all of whom express strong interest in the cosmetic results in addition to the complete resolution of their medical problems. Here, we introduce a laparoscopic management technique for a choledochal cyst. METHODS Between 2003 and 2011, we performed a laparoscopic choledochal cyst excision procedure on 82 patients using a four-hole method. There were three open-conversion cases, one case involving robotic surgery, and one case involving combined laparoscopic liver resection because the cyst had affected the liver. Excision of the cyst and anastomosis were performed laparoscopically. We will present our method with a video. RESULTS The mean operation time was 230 min. The estimated blood loss was 197 ml. The average hospital stay was 8.6 days. The most common complications were minor bile leakage (7 %) and fluid collection (2.5 %), both of which were managed conservatively. CONCLUSIONS Laparoscopic management can be a treatment of choice for the most instances of choledochal cyst considering its good cosmetic results and its feasible level of operative safety.
Collapse
Affiliation(s)
- Jin-Young Jang
- Department of Surgery and Cancer Research Institute, Seoul National University College of Medicine, 28 Yongon-dong, Chongno-gu, Seoul 110-744, South Korea.
| | | | | | | | | | | | | | | | | | | |
Collapse
|