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Kang, Yue Jai,Kim, Ki Hong The Korean Society of Fish Pathology 2018 한국어병학회지 Vol.31 No.2
The purpose of the present study was to determine whether the scuticocidal activity of olive flounder (Paralichthys olivaceus) head-kidney leucocytes can be enhanced by stimulation with polyinosine-polycytosine [poly (I:C)]. The growth of Miamiensis avidus was not affected by exposure to unstimulated or poly (I:C)-stimulated leucocytes alone, heat-inactivated immune serum alone, or unstimulated leucocytes plus heat-inactivated immune serum. However, leucocytes stimulated with poly (I:C) showed clearly high scuticocidal activity against M. avidus in the presence of heat-inactivated immune serum. Furthermore, numerous poly (I:C)-stimulated leucocytes occupied the surface of scuticociliates in the presence of the heat-inactivated immune serum, which led to lysis of scuticociliates. These results suggest that both of the stimulation of leukocytes and the immobilization of scuticociliates are necessary to kill scuticociliates by leukocytes.
( Yue Jai Kang ),( Ki Hong Kim ) 한국어병학회 2018 한국어병학회지 Vol.31 No.2
The purpose of the present study was to determine whether the scuticocidal activity of olive flounder (Paralichthys olivaceus) head-kidney leucocytes can be enhanced by stimulation with polyinosine-polycytosine [poly (I:C)]. The growth of Miamiensis avidus was not affected by exposure to unstimulated or poly (I:C)-stimulated leucocytes alone, heat-inactivated immune serum alone, or unstimulated leucocytes plus heat-inactivated immune serum. However, leucocytes stimulated with poly (I:C) showed clearly high scuticocidal activity against M. avidus in the presence of heat-inactivated immune serum. Furthermore, numerous poly (I:C)-stimulated leucocytes occupied the surface of scuticociliates in the presence of the heat-inactivated immune serum, which led to lysis of scuticociliates. These results suggest that both of the stimulation of leukocytes and the immobilization of scuticociliates are necessary to kill scuticociliates by leukocytes.
Kang, Yue-Gyu The Korean Society of Plant Pathology 2000 Plant Pathology Journal Vol.16 No.4
In disease surveys from 1986 ti 1998, disease incidence of tobacco black shank was gradually increased in burley tobacco from 1996. To study the causes of the disease occurrence, one hundred and fourteen isolates of Phytophthora parasitica var. nicotianae (Ppn) were collected from burley tobacco-growing areas in the southern part of Korea during 1996-1997, and tested in vitro for meatlaxyl sensitivity which was determined by measuring the mycelial growth on corn meal agar (CMA) amended with metalaxyl. Of the tested isolates, 78.1% showed sensitive to metalaxyl, having $\textrm{ED}_{50}$ values less than 1.0 $\mu\textrm{g}/$\textrm{ml}, while 1.7% was resistant weth $\textrm{ED}_{50}$ greater than 100 $\mu\textrm{g}/$\textrm{ml}. Ppn isolates from three provinces, Chungnam, Chonbuk and Chonnam showed similar distributions of metalaxyl sensitivity. Metalaxyl-resistant isolates were not significantly different from metalaxyl-sensitive ones in mycelial growth rate, chlamydospore formation capacity and size of the spore, and pathogenicity on tobacco plant (cv. Burley 21). These results suggest that the metalaxyl-resistant Ppn in burley tobacco may be one of the major factors to cause the higher occurrence of the tobacco black shank in the burley tobacco-growing area.
Kang, Yue-Jai,Kim, Ki-Hong The Korean Society of Fisheries and Aquatic Scienc 2010 Fisheries and Aquatic Sciences Vol.13 No.3
Growth hormone (GH) is known as one of the main osmoregulators in euryhaline teleosts during seawater (SW) adaptation. Many of the physiological actions of GH are mediated through insulin-like growth factor-I (IGF-I), and the GH/IGF-I axis is associated with osmoregulation of fish during SW acclimation. However, little information is available on the response of fish IGF-II to hyperosmotic stress. Here we present the first cloned IGF-I and IGF-II cDNAs of marine medaka, Oryzias dancena, and an analysis of the molecular characteristics of the genes. The marine medaka IGF-I cDNA is 1,340 bp long with a 257-bp 5' untranslated region (UTR), a 528 bp 3' UTR, and a 555-bp open reading frame (ORF) encoding a propeptide of 184 amino acid (aa) residues. The full-length marine medaka IGF-II cDNA consists of a 639 bp ORF encoding 212 aa, a 109 bp 5' UTR, and a 416 bp 3' UTR. Homology comparison of the deduced aa sequences with other IGF-Is and IGF-IIs showed that these genes in marine medaka shared high structural homology with orthologs from other teleost as well as mammalian species, suggesting high conservation of IGFs throughout vertebrates. The IGF-I mRNA level increased following transfer of marine medaka from freshwater (FW) to SW, and the expression level was higher than that of the control group, which was maintained in FW. This significantly elevated IGF-I level was maintained throughout the experiment (14 days), suggesting that in marine medaka, IGF-I is deeply involved in the adaptation to abrupt salinity change. In contrast to IGF-I, the increased level of marine medaka IGF-II mRNA was only maintained for a short period, and quickly returned a level similar to that of the control group, suggesting that marine medaka IGF-II might be a gene that responds to acute stress or one that produces a supplemental protein to assist with the osmoregulatory function of IGF-I during an early phase of salinity change.
Xing Yue Xu,Eun Seob Yi,Chang Ho Kang,Ying Liu,Yeong-Geun Lee,Han Sol Choi,Hyun Bin Jang,Yue Huo,Nam In Baek,Deok Chun Yang,Yeon Ju Kim 고려인삼학회 2021 Journal of Ginseng Research Vol.45 No.6
Background: Main bioactive constituents and pharmacological functions of ripened red ginseng berry(Panax ginseng Meyer) have been frequently reported. Yet, the research gap targeting the beneficial activitiesof transformed green ginseng berries has not reported elsewhere. Methods: Ginsenosides of new green berry cultivar K-1 (GK-1) were identified by HPLC-QTOF/MS. Ginsenosidesbioconversion in GK-1 by bgp1 enzyme was confirmed with HPLC and TLC. Then, mechanismsof GK-1 and b-glucosidase (bgp1) biotransformed GK-1 (BGK-1) were determined by QuantitativeReverse Transcription-Polymerase Chain Reaction and Western blot. Results: GK-1 possesses highest ginsenosides especially ginsenoside-Re amongst seven ginseng cultivarsincluding (Chunpoong, Huangsuk, Kumpoong, K-1, Honkaejong, Gopoong, and Yunpoong). Ginseng root’sbiomass is not affected with the harvest of GK-1 at 3 weeks after flowering period. Then, Re is bioconvertedinto a promising pharmaceutical effect of Rg2 via bgp1. According to the results of cell assays,BGK-1 shows decrease of tyrosinase and melanin content in a-melanocyte-stimulating hormonechallenged-murine melanoma B16 cells. BGK-1 which is comparatively more effective than GK-1 extractshows significant suppression of the nuclear factor (NF)-kB activation and inflammatory target genes, inLPS-stimulated RAW 264.7 cells. Conclusion: These results reported effective whitening and anti-inflammatory of BGK-1 as compared toGK-1.