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영지 (Ganoderma lucidum) 자실체 다당류의 분자량에 따른 생리활성
한만덕;김용현;이현수;권현정;전미애;한국일 순천향대학교 기초과학연구소 2010 순천향자연과학연구 논문집 Vol.16 No.2
The study was conducted to investigate the biological activities of an protein-bound polysaccharide (GLP) isolated from the fruit body of Ganoderma lucidum. GLP was extracted by hot water and then it was purified high (GLP-HM) and low (GLP-LM) molecular weight fraction by ethanol precipitation. Both of GLP-HM and GLP-LM at doses of 20 mg/kg in vivo had the ability to inhibit the tumor growth of Sarcoma 180 tumor-bearing mice. Inhibition rates of tumor (%) were inhibited 60.6% and 38.7% by GLP-HM and GLP-LM, respectively. In assay of anti-complementary activity in vitro, the GLP-HM were higher than that of the GLP-LM polysaccharide. And also, the GLP-HM enhanced nitric oxide production of mouse bone marrow cells. When the GLP-HM was injected intraperitoneally in tumor-bearing mouse at doses of 20 mg/kg, the concentration of TNF-α in vivo was 140.9 pg/ml in the serum, 269.6 pg/ml in sarcoma tumor mass and 879.4 pg/ml in liver. This study shows that the high molecular polysaccharide from mushroom can enhance more the bioactivities than that of the low molecular polysaccharide.
Kook, Sung-Ho,Son, Young-Ok,Han, Seong-Kyu,Lee, Hyung-Soon,Kim, Beom-Tae,Jang, Yong-Suk,Choi, Ki-Choon,Lee, Keun-Soo,Kim, So-Soon,Lim, Ji-Young,Jeon, Young-Mi,Kim, Jong-Ghee,Lee, Jeong-Chae Korean Society for Biochemistry and Molecular Biol 2005 Journal of biochemistry and molecular biology Vol.38 No.6
Epstein-Barr virus (EBV) infects more than 90% of the world's population and has a potential oncogenic nature. A histone deacetylase (HDAC) inhibitor, trichostatin A (TSA), has shown potential ability in cancer chemoprevention and treatment, but its effect on EBV-infected Akata cells has not been examined. This study investigated the effect of TSA on the proliferation and apoptosis of the cells. TSA inhibited cell growth and induced cytotoxicity in the EBV infected Akata cells. TSA treatment sensitively induced apoptosis in the cell, which was demonstrated by the increased number of positively stained cells in the TUNEL assay, the migration of many cells to the sub-$G_0/G_1$ phase in flow cytometric analysis, and the ladder formation of genomic DNA. Western blot analysis showed that caspase-dependent pathways are involved in the TSA-induced apoptosis of EBV-infected Akata cells. Overall, this study shows that EBV-infected B lymphomas are quite sensitive to TSA-provoked apoptosis.
Lee, Eun-Ju,Park, Kwan-Sik,Jeon, In-Sook,Cho, Jae-Woon,Lee, Sang-Jeon,Choy, Hyun E.,Song, Ki-Duk,Lee, Hak-Kyo,Choi, Joong-Kook Korean Society for Molecular and Cellular Biology 2016 Molecules and cells Vol.39 No.7
Lysosomes are cellular organelles containing diverse classes of catabolic enzymes that are implicated in diverse cellular processes including phagocytosis, autophagy, lipid transport, and aging. Lysosome-associated membrane proteins (LAMP-1 and LAMP-2) are major glycoproteins important for maintaining lysosomal integrity, pH, and catabolism. LAMP-1 and LAMP-2 are constitutively expressed in Salmonella-infected cells and are recruited to Salmonella-containing vacuoles (SCVs) as well as Salmonella- induced filaments (Sifs) that promote the survival and proliferation of the Salmonella. LAMP-3, also known as DC-LAMP/CD208, is a member of the LAMP family of proteins, but its role during Salmonella infection remains unclear. DNA microarray analysis identified LAMP-3 as one of the genes responding to LPS stimulation in THP-1 macrophage cells. Subsequent analyses reveal that LPS and Salmonella induced the expression of LAMP-3 at both the transcriptional and translational levels. Confocal Super resolution N-SIM imaging revealed that LAMP-3, like LAMP-2, shifts its localization from the cell surface to alongside Salmonella. Knockdown of LAMP-3 by specific siRNAs decreased the number of Salmonella recovered from the infected cells. Therefore, we conclude that LAMP-3 is induced by Salmonella infection and recruited to the Salmonella pathogen for intracellular proliferation.
Mycobacterium paraintracellulare sp. nov., for the genotype INT-1 of Mycobacterium intracellulare
Lee, So-Young,Kim, Byoung-Jun,Kim, Hong,Won, Yu-Seop,Jeon, Che Ok,Jeong, Joseph,Lee, Seon Ho,Lim, Ji-Hun,Lee, Seung-Heon,Kim, Chang Ki,Kook, Yoon-Hoh,Kim, Bum-Joon Microbiology Society 2016 International journal of systematic and evolutiona Vol.66 No.-
Lee, Dong Hee,Lee, In Chul,Kim, Kook Jin,Kim, Dong Su,Na, Hyung Jin,Lee, In-Jung,Kang, Sang-Mo,Jeon, Hyung-Woo,Le, Phi Yen,Ko, Jae-Heung 한국식물학회 2014 Journal of Plant Biology Vol.57 No.2
Gibberellin (GA), a plant hormone, is involved in many aspects of plant growth and development both in vegetative and reproductive phases. GA2-oxidase plays a key role in the GA catabolic pathway to reduce bioactive GAs. We produced transgenic Arabidopsis plants expressing GA2-oxidase 4 (AtGA2ox4) under the control of a senescence-associated promoter (SEN1). As we hypothesized, transgenic plants (SEN1::AtGA2ox4) exhibited a dominant semi-dwarf phenotype with a decrease of bioactive GAs (e.g., GA4 and GA1) up to two-fold compared to control plants. Application of bioactive GA3 resulted in increased shoot length, indicating that the GA signaling pathway functions normally in the SEN1::AtGA2ox4 plants. Expressions of other members of GA2-oxidase family, such as AtGA2ox1, AtGA2ox3, AtGA2ox6, and AtGA2ox8, were decreased slightly in the flower and silique tissues while GA biosynthetic genes (e.g., AtGA20ox1, AtGA20ox2 and AtGA3ox1) were not significantly changed in the SEN::AtGA2ox4 plants. Using proteome profiling (2-D PAGE followed by MALDI-TOF/MS), we identified 29 protein spots that were increased in the SEN1::AtGA2ox4 plants, but were decreased to wild-type levels by GA3 treatment. The majority were found to be involved in photosynthesis and carbon/energy metabolism. Unlike the previous constitutive over-expression of GA2-oxidases, which frequently led to floral deformity and/or loss of fertility, the SEN1::AtGA2ox4 plants retained normal floral morphology and seed production. Accordingly, the expressions of FT and CO genes remained unchanged in the SEN1::AtGA2ox4 plants. Taken together, our results suggest that the dominant dwarf trait carried by SEN1::AtGA2ox4 plants can be used as an efficient dwarfing tool in plant biotechnological applications.
Jeon, Ju-Hyun,Kim, Yeon-Kook,Lee, Sang-Guei,Lee, Geon-Hwi,Lee, Hoi-Seon Korean Society of Applied Entomology 2011 Journal of Asia-Pacific Entomology Vol.20 No.4
Diospyros kaki root-derived materials were examined for insecticidal properties against Nilaparvata lugens and Laodelphax striatellus. Based on the <TEX>$LD_{50}$</TEX> values, the chloroform fraction of D. kaki extracts showed the most activity against N. lugens (3.78 <TEX>${\mu}g$</TEX>/female) and L. striatellus (7.32 <TEX>${\mu}g$</TEX>/female). The active constituent of the chloroform fraction was isolated by various chromatographic methods and was identified as 5-hydroxy-2-methyl-1,4-naphthoquinone by spectroscopic analyses. To establish the structure-activity relationships, the insecticidal effects of 5-hydroxy-2-methyl-1,4-naphthoquinone and its derivatives against N. lugens and L. striatellus were determined using micro-topical application bioassays. On the basis of <TEX>$LD_{50}$</TEX> values, 5-hydroxy-1,4-naphthoquinone was the most effective against N. lugens (0.072 <TEX>${\mu}g$</TEX>/female) and L. striatellus (0.183 <TEX>${\mu}g$</TEX>/female). 2-Bromo-1,4-naphthoquinone, 2-hydroxy-1,4-naphthoquinone, and 5-hydroxy-2-methyl-1,4-naphthoquinone also had potent insecticidal activities against N. lugens and L. striatellus. In contrast, no insecticidal activity was observed with 2-methoxy-1,4-naphthoquinone or 2-methyl-1,4-naphthoquinone. These results indicate that the functional group (bromo- and hydroxyl-) at the C-2 position of the 1,4-naphthoquinone skeleton and the change in position of the hydroxyl group play important roles in insecticidal activity. Therefore, naturally occurring D. kaki root-derived 5-hydroxy-2-methyl-1,4-naphthoquinone and its derivatives may be suitable as insecticides.
The clinical impact of family history of cancer in female never-smoker lung adenocarcinoma
Lee, Youngjoo,Jeon, Jae Hyun,Goh, Sung-Ho,Roh, Hanseong,Yun, Ji-Young,Kwon, Nak-Jung,Choi, Jin Ho,Yang, Hee Chul,Kim, Moon Soo,Lee, Jong Mog,Lee, Geon Kook,Han, Ji-Youn Elsevier 2019 Lung cancer Vol.136 No.-
<P><B>Abstract</B></P> <P><B>Objectives</B></P> <P>Accumulating evidence reveals the association between the risk of never-smoker lung cancer and family history of cancer. However, the clinicogenomic effect of family history of cancer in never-smoker lung cancer remains unknown.</P> <P><B>Material and methods</B></P> <P>We screened 3,241 lung cancer patients who (a) underwent curative resection at National Cancer Center (Goyang, Korea) between 2001–2014, and (b) completed a pre-designed interview about family/smoking history at the time of diagnosis and identified 604 female never smoker lung adenocarcinoma. A positive family history of cancer [categorized as pulmonary cancer (FH-PC) or non-pulmonary cancer (FH-NPC)] was defined as a self-reported history of cancer in first-degree relatives. Survival data were followed up until January 2017. Multiplexed targeted next-generation sequencing was performed for genetic profiling.</P> <P><B>Results</B></P> <P>Of 604 patients, 29.1% (n = 176) had a FH, including 132 (21.9%) with FH-NPC and 44 (7.3%) with FH-PC. Patients with the FH-NPC had a higher proportion of young patients (≤45 years) than those without the FH-NPC (FH-NPC, FH-PC, and no FH; 13.6%, 2.3%, and 8.2%, respectively; <I>P</I> = 0.032). Patients with the FH-NPC had an increased risk of recurrence (hazard ratio [HR]: 1.90; 95% confidence interval [CI]: 1.40–2.56; <I>P<</I>0.001) and death (HR: 1.67; 95% CI: 1.18–2.37; <I>P=</I>0.004). In contrast, the FH-PC had no prognostic effect on recurrence (HR: 1.23; 95% CI: 0.71–2.15; <I>P = 0.456</I>) and death (HR: 0.93; 95% CI: 0.45–1.91; <I>P=</I>0.838). Among three driver oncogene alterations, <I>EGFR</I> mutation was significantly associated with the FH-PC (53.8%, 84.1%, and 65.8%, respectively; <I>P</I> = 0.016), <I>ALK</I>/<I>ROS1</I>/<I>RET</I> fusions was significantly associated with the FH-NPC (13.7%, 0.0%, and 5.0%, respectively; <I>P</I> = 0.004), but <I>KRAS</I> mutation was not associated with any type of the FH (13.8% vs. 6.0% vs. 7.8%, respectively; <I>P</I> = 0.288).</P> <P><B>Conclusion</B></P> <P>The type of family history of cancer was associated with distinct clinocogenomic subtypes and prognosis of never-smoker lung adenocarcinoma.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Family history of cancer is related to distinct subtypes of never smoker lung cancer. </LI> <LI> <I>ALK/ROS1/RET</I> fusions are enriched in patients with family history of nonlung cancer. </LI> <LI> <I>EGFR</I> mutations are enriched in patients with family history of lung cancer. </LI> <LI> Family history of nonlung cancer is associated with poor prognosis after operation. </LI> </UL> </P>
Lee, Jin-Kook,Kim, Mi-Ra,Lee, Hyun-Jeong,Chung, Ildoo,Lim, Kwon Taek,Jeon, Sangik,Lee, Won-Ki WILEY-VCH Verlag 2006 Macromolecular symposia Vol.239 No.1
<P>In the stereocomplex between enantiomeric poly(l-lactide) (l-PLA) and poly(d-lactide), crystallites formed as a result of stereocomplexation, equimolar l- and d-lactide unit sequences are packed side by side. The stereocomplex exhibits a melting temperature higher by about 50 °C than that of each homopolymer. In this study, we attempt to obtain further insight into the stereocomplex-induced surface structure of enantiomeric PLA blend films. The design of the blend systems is based on principles of surface segregation of multicomponent polymeric systems with a low surface energy, triblock copolymer (l-PLA-b-PDMS-b-l-PLA) of l-PLA and poly-(dimethyl siloxane). (l-PLA-b-PDMS-b-l-PLA/l-PLA) blend films showed the surface segregation of PDMS, regardless of blend composition while the surface composition of PDMS in the (l-PLA-b-PDMS-b-l-PLA/d-PLA) blend films was strongly depended on blend composition or a degree of complexation. These results are likely due to strong interaction between d- and l-lactide unit sequences, which prevents the surface segregation of PDMS.</P>