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1. α-Glucosidase inhibitory fatty acids from Morchella fluvialis mushroom

Author

Turk Ayman, Lee Solip, Lee Hak Hyun, Yeon Sang Won, Ryu Se Hwan, Seo Geum Hee, Chang Hyun You, Hwang Bang Yeon, and Lee Mi Kyeong

Subjects
α-glucosidase, linoleic acid, morchella fluvialis, morel, Plant culture, SB1-1110
Abstract

Morchella fluvialis, a morel mushroom, is one of the most famous edible mushrooms all over the world. Interest in this mushroom is steadily increasing due to its organoleptic properties and nutritional value. The methanolic extract of M. fluvialis showed α-glucosidase inhibitory and antioxidant activities in an assay system. Therefore, the purification and characterisation of bioactive metabolites and evaluation of biological activity were conducted. Fractionation of the M. fluvialis extract resulted in the isolation of nine compounds, namely, three fatty acids, (9Z,12Z)-octadecadienoic acid (linoleic acid, 1), (9Z,12Z)-3-hydroxyoctadecadienoic acid (2) and (6Z,9Z)-13-hydroxyoctadecadienoic acid (3); four sterols, stellasterol (4), ergosterol peroxide (5), ergosterol (6) and brassicasterol (7); one sugar alcohol, arabitol (8); and nicotinamide (9). Among them, compounds 2–3 and 7 were first reported from Morchella. In addition, compound 1 exhibited potent α-glucosidase inhibition, with an IC50 value of 14.8 μM. The content of compound 1, the major compound, was 1.2 mg · g–1 extract, as quantitated by HPLC analysis, which was lower than the IC50 value of compound 1. Therefore, M. fluvialis can benefit from diabetes and related diseases through the synergistic effect of linoleic acid (1) and other ingredients.

Published
2023
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20. Antioxidant and α-glucosidase inhibitory potential of the pollen of Hibiscus spp.

Author

Yeon, Sang Won, Kwon, Hae-Yun, Park, Yunmi, Turk, Ayman, Lee, Solip, Ryu, Se Hwan, Han, Yoo Kyong, Lee, Ki Yong, Ela, Maha Aboul, Hwang, Bang Yeon, and Lee, Mi Kyeong

Abstract

Hibiscus species are flowering plants of the Malvaceae family. Hibiscus are widely distributed in tropical and subtropical regions and play an important role not only in ornamental aspects but also traditional medicine. In this study, seven compounds, mukungarrole (1), a new compound and six known flavonoid derivatives (2–7) were isolated from Hibiscus syriacus pollen. Among the isolated compounds, kaempferol (2) and vincetoxicoside B (3) showed antioxidant activity. Additonally, the new compound, mukungarrole (1), along with kaempferol (2) and isorhamnetin-7-O-rhamnoside (5), showed α-glucosidase inhibitory activity and its interaction with α-glucosidase was confirmed using molecular docking analysis. Further comparison of five varieties of Hibiscus spp. showed that all five species contained vincetoxicoside B (3) and kaempferol-7-O-rhamnoside (4) as major components and exhibited antioxidant and α-glucosidase inhibitory activities. However, there was differences in the content of vincetoxicoside B (3) and kaempferol-7-O-rhamnoside (4) and minor components depending on of Hibiscus variety, which contributed to differences in efficacy. This study proves that H. syriacus pollen and its constituents have antioxidant and α-glucosidase inhibitory potentials and the content and efficacy vary depending on Hibiscus species. [ABSTRACT FROM AUTHOR]

Published
2024
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24. Epigenome-wide meta-analysis of DNA methylation and childhood asthma

Author

Reese, Sarah E., Xu, Cheng-Jian, den Dekker, Herman T., Lee, Mi Kyeong, Sikdar, Sinjini, Ruiz-Arenas, Carlos, Merid, Simon K., Rezwan, Faisal I., Page, Christian M., Ullemar, Vilhelmina, Melton, Phillip E., Oh, Sam S., Yang, Ivana V., Burrows, Kimberley, Söderhäll, Cilla, Jima, Dereje D., Gao, Lu, Arathimos, Ryan, Küpers, Leanne K., Wielscher, Matthias, Rzehak, Peter, Lahti, Jari, Laprise, Catherine, Madore, Anne-Marie, Ward, James, Bennett, Brian D., Wang, Tianyuan, Bell, Douglas A., Vonk, Judith M., Håberg, Siri E., Zhao, Shanshan, Karlsson, Robert, Hollams, Elysia, Hu, Donglei, Richards, Adam J., Bergström, Anna, Sharp, Gemma C., Felix, Janine F., Bustamante, Mariona, Gruzieva, Olena, Maguire, Rachel L., Gilliland, Frank, Baïz, Nour, Nohr, Ellen A., Corpeleijn, Eva, Sebert, Sylvain, Karmaus, Wilfried, Grote, Veit, Kajantie, Eero, Magnus, Maria C., Örtqvist, Anne K., Eng, Celeste, Liu, Andrew H., Kull, Inger, Jaddoe, Vincent W.V., Sunyer, Jordi, Kere, Juha, Hoyo, Cathrine, Annesi-Maesano, Isabella, Arshad, Syed Hasan, Koletzko, Berthold, Brunekreef, Bert, Binder, Elisabeth B., Räikkönen, Katri, Reischl, Eva, Holloway, John W., Jarvelin, Marjo-Riitta, Snieder, Harold, Kazmi, Nabila, Breton, Carrie V., Murphy, Susan K., Pershagen, Göran, Anto, Josep Maria, Relton, Caroline L., Schwartz, David A., Burchard, Esteban G., Huang, Rae-Chi, Nystad, Wenche, Almqvist, Catarina, Henderson, A. John, Melén, Erik, Duijts, Liesbeth, Koppelman, Gerard H., and London, Stephanie J.

Published
2019
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27. Genetic landscape of chronic obstructive pulmonary disease identifies heterogeneous cell-type and phenotype associations

Author

Sakornsakolpat, Phuwanat, Prokopenko, Dmitry, Lamontagne, Maxime, Reeve, Nicola F., Guyatt, Anna L., Jackson, Victoria E., Shrine, Nick, Qiao, Dandi, Bartz, Traci M., Kim, Deog Kyeom, Lee, Mi Kyeong, Latourelle, Jeanne C., Li, Xingnan, Morrow, Jarrett D., Obeidat, Ma’en, Wyss, Annah B., Bakke, Per, Barr, R. Graham, Beaty, Terri H., Belinsky, Steven A., Brusselle, Guy G., Crapo, James D., de Jong, Kim, DeMeo, Dawn L., Fingerlin, Tasha E., Gharib, Sina A., Gulsvik, Amund, Hall, Ian P., Hokanson, John E., Kim, Woo Jin, Lomas, David A., London, Stephanie J., Meyers, Deborah A., O’Connor, George T., Rennard, Stephen I., Schwartz, David A., Sliwinski, Pawel, Sparrow, David, Strachan, David P., Tal-Singer, Ruth, Tesfaigzi, Yohannes, Vestbo, Jørgen, Vonk, Judith M., Yim, Jae-Joon, Zhou, Xiaobo, Bossé, Yohan, Manichaikul, Ani, Lahousse, Lies, Silverman, Edwin K., Boezen, H. Marike, Wain, Louise V., Tobin, Martin D., Hobbs, Brian D., and Cho, Michael H.

Published
2019
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35. Zaluzanin C Alleviates Inflammation and Lipid Accumulation in Kupffer Cells and Hepatocytes by Regulating Mitochondrial ROS.

Author

Jung, Ji-Won, Wang, Feng, Turk, Ayman, Park, Jeong-Su, Ma, Hwan, Ma, Yuanqiang, Noh, Hye-Rin, Sui, Guoyan, Shin, Dong-Su, Lee, Mi-Kyeong, and Roh, Yoon Seok

Subjects
KUPFFER cells, LIVER cells, TUMOR necrosis factors, MITOCHONDRIA, FATTY acid oxidation, CARYOPHYLLENE, LIPIDS
Abstract

Zaluzanin C (ZC), a sesquiterpene lactone isolated from Laurus nobilis L., has been reported to have anti-inflammatory and antioxidant effects. However, the mechanistic role of ZC in its protective effects in Kupffer cells and hepatocytes has not been elucidated. The purpose of this study was to elucidate the efficacy and mechanism of action of ZC in Kupffer cells and hepatocytes. ZC inhibited LPS-induced mitochondrial ROS (mtROS) production and subsequent mtROS-mediated NF-κB activity in Kupffer cells (KCs). ZC reduced mRNA levels of pro-inflammatory cytokines (Il1b and Tnfa) and chemokines (Ccl2, Ccl3, Ccl4, Cxcl2 and Cxcl9). Tumor necrosis factor (TNF)-α-induced hepatocyte mtROS production was inhibited by ZC. ZC was effective in alleviating mtROS-mediated mitochondrial dysfunction. ZC enhanced mitophagy and increased mRNA levels of fatty acid oxidation genes (Pparα, Cpt1, Acadm and Hadha) and mitochondrial biosynthetic factors (Pgc1α, Tfam, Nrf1 and Nrf2) in hepatocytes. ZC has proven its anti-lipid effect by improving lipid accumulation in hepatocytes by enhancing mitochondrial function to facilitate lipid metabolism. Therefore, our study suggests that ZC may be an effective compound for hepatoprotection by suppressing inflammation and lipid accumulation through regulating mtROS. [ABSTRACT FROM AUTHOR]

Published
2023
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38. Hericerin derivatives activates a pan‐neurotrophic pathway in central hippocampal neurons converging to ERK1/2 signaling enhancing spatial memory.

Author

Martínez‐Mármol, Ramón, Chai, YeJin, Conroy, Jacinta N., Khan, Zahra, Hong, Seong‐Min, Kim, Seon Beom, Gormal, Rachel S., Lee, Dae Hee, Lee, Jae Kang, Coulson, Elizabeth J., Lee, Mi Kyeong, Kim, Sun Yeou, and Meunier, Frédéric A.

Subjects
SPATIAL memory, NEUROTROPHIN receptors, NERVE growth factor, HIPPOCAMPUS (Brain), HERICIUM erinaceus, PERIPHERAL nervous system
Abstract

The traditional medicinal mushroom Hericium erinaceus is known for enhancing peripheral nerve regeneration through targeting nerve growth factor (NGF) neurotrophic activity. Here, we purified and identified biologically new active compounds from H. erinaceus, based on their ability to promote neurite outgrowth in hippocampal neurons. N‐de phenylethyl isohericerin (NDPIH), an isoindoline compound from this mushroom, together with its hydrophobic derivative hericene A, were highly potent in promoting extensive axon outgrowth and neurite branching in cultured hippocampal neurons even in the absence of serum, demonstrating potent neurotrophic activity. Pharmacological inhibition of tropomyosin receptor kinase B (TrkB) by ANA‐12 only partly prevented the NDPIH‐induced neurotrophic activity, suggesting a potential link with BDNF signaling. However, we found that NDPIH activated ERK1/2 signaling in the absence of TrkB in HEK‐293T cells, an effect that was not sensitive to ANA‐12 in the presence of TrkB. Our results demonstrate that NDPIH acts via a complementary neurotrophic pathway independent of TrkB with converging downstream ERK1/2 activation. Mice fed with H. erinaceus crude extract and hericene A also exhibited increased neurotrophin expression and downstream signaling, resulting in significantly enhanced hippocampal memory. Hericene A therefore acts through a novel pan‐neurotrophic signaling pathway, leading to improved cognitive performance. [ABSTRACT FROM AUTHOR]

Published
2023
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39. Adenosine Deaminase Inhibitory Activity of Medicinal Plants: Boost the Production of Cordycepin in Cordyceps militaris.

Author

Turk, Ayman, Lee, Solip, Yeon, Sang Won, Ryu, Se Hwan, Han, Yoo Kyong, Kim, Young Jun, Ko, Sung Min, Kim, Beom Seok, Hwang, Bang Yeon, Lee, Ki Yong, and Lee, Mi Kyeong

Subjects
ADENOSINE deaminase, MEDICINAL plants, CORDYCEPS, BROWN rice, MOLECULAR docking, DEOXYADENOSINE, ADENOSINES
Abstract

Cordycepin, also known as 3′-deoxyadenosine, is a major active ingredient of Cordyceps militaris with diverse pharmacological effects. Due to its limited supply, many attempts have been conducted to enhance the cordycepin content. As part of this study, eight medicinal plants were supplemented with cultivation substrates of Cordyceps to increase the cordycepin content. Cordyceps cultivated on brown rice supplemented with Mori Folium, Curcumae Rhizoma, Saururi Herba, and Angelicae Gigantis Radix exhibited increased cordycepin content compared to a brown rice control. Among them, the addition of 25% Mori Folium increased the cordycepin content up to 4 times. Adenosine deaminase (ADA) modulates the deamination of adenosine and deoxyadenosine, and the inhibitors have therapeutic potential with anti-proliferative and anti-inflammatory properties. As ADA is also known to be involved in converting cordycepin to 3′-deoxyinosine, the inhibitory activity of medicinal plants on ADA was measured by spectrophotometric analysis using cordycepin as a substrate. As expected, Mori Folium, Curcumae Rhizoma, Saururi Herba, and Angelicae Gigas Radix strongly inhibited ADA activity. Molecular docking analysis also showed the correlation between ADA and the major components of these medicinal plants. Conclusively, our research suggests a new strategy of using medicinal plants to enhance cordycepin production in C. militaris. [ABSTRACT FROM AUTHOR]

Published
2023
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46. Genome-wide association analysis identifies six new loci associated with forced vital capacity

Author

Loth, Daan W, Artigas, María Soler, Gharib, Sina A, Wain, Louise V, Franceschini, Nora, Koch, Beate, Pottinger, Tess D, Smith, Albert Vernon, Duan, Qing, Oldmeadow, Chris, Lee, Mi Kyeong, Strachan, David P, James, Alan L, Huffman, Jennifer E, Vitart, Veronique, Ramasamy, Adaikalavan, Wareham, Nicholas J, Kaprio, Jaakko, Wang, Xin-Qun, Trochet, Holly, Kähönen, Mika, Flexeder, Claudia, Albrecht, Eva, Lopez, Lorna M, de Jong, Kim, Thyagarajan, Bharat, Alves, Alexessander Couto, Enroth, Stefan, Omenaas, Ernst, Joshi, Peter K, Fall, Tove, Viñuela, Ana, Launer, Lenore J, Loehr, Laura R, Fornage, Myriam, Li, Guo, Wilk, Jemma B, Tang, Wenbo, Manichaikul, Ani, Lahousse, Lies, Harris, Tamara B, North, Kari E, Rudnicka, Alicja R, Hui, Jennie, Gu, Xiangjun, Lumley, Thomas, Wright, Alan F, Hastie, Nicholas D, Campbell, Susan, Kumar, Rajesh, Pin, Isabelle, Scott, Robert A, Pietiläinen, Kirsi H, Surakka, Ida, Liu, Yongmei, Holliday, Elizabeth G, Schulz, Holger, Heinrich, Joachim, Davies, Gail, Vonk, Judith M, Wojczynski, Mary, Pouta, Anneli, Johansson, Åsa, Wild, Sarah H, Ingelsson, Erik, Rivadeneira, Fernando, Völzke, Henry, Hysi, Pirro G, Eiriksdottir, Gudny, Morrison, Alanna C, Rotter, Jerome I, Gao, Wei, Postma, Dirkje S, White, Wendy B, Rich, Stephen S, Hofman, Albert, Aspelund, Thor, Couper, David, Smith, Lewis J, Psaty, Bruce M, Lohman, Kurt, Burchard, Esteban G, Uitterlinden, André G, Garcia, Melissa, Joubert, Bonnie R, McArdle, Wendy L, Musk, A Bill, Hansel, Nadia, Heckbert, Susan R, Zgaga, Lina, van Meurs, Joyce B J, Navarro, Pau, Rudan, Igor, Oh, Yeon-Mok, Redline, Susan, Jarvis, Deborah L, Zhao, Jing Hua, Rantanen, Taina, O'Connor, George T, Ripatti, Samuli, Scott, Rodney J, Karrasch, Stefan, Grallert, Harald, Gaddis, Nathan C, Starr, John M, Wijmenga, Cisca, Minster, Ryan L, Lederer, David J, Pekkanen, Juha, Gyllensten, Ulf, Campbell, Harry, Morris, Andrew P, Gläser, Sven, Hammond, Christopher J, Burkart, Kristin M, Beilby, John, Kritchevsky, Stephen B, Gudnason, Vilmundur, Hancock, Dana B, Williams, O Dale, Polasek, Ozren, Zemunik, Tatijana, Kolcic, Ivana, Petrini, Marcy F, Wjst, Matthias, Kim, Woo Jin, Porteous, David J, Scotland, Generation, Smith, Blair H, Viljanen, Anne, Heliövaara, Markku, Attia, John R, Sayers, Ian, Hampel, Regina, Gieger, Christian, Deary, Ian J, Boezen, H Marike, Newman, Anne, Jarvelin, Marjo-Riitta, Wilson, James F, Lind, Lars, Stricker, Bruno H, Teumer, Alexander, Spector, Timothy D, Melén, Erik, Peters, Marjolein J, Lange, Leslie A, Barr, R Graham, Bracke, Ken R, Verhamme, Fien M, Sung, Joohon, Hiemstra, Pieter S, Cassano, Patricia A, Sood, Akshay, Hayward, Caroline, Dupuis, Josée, Hall, Ian P, Brusselle, Guy G, Tobin, Martin D, and London, Stephanie J

Published
2014
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49. Characterization of Antioxidant and α-Glucosidase Inhibitory Compounds of Cratoxylum formosum ssp. pruniflorum and Optimization of Extraction Condition.

Author

An, Heewon, Thanh, Le Nguyen, Khanh, Le Quoc, Ryu, Se Hwan, Lee, Solip, Yeon, Sang Won, Lee, Hak Hyun, Turk, Ayman, Lee, Ki Yong, Hwang, Bang Yeon, and Lee, Mi Kyeong

Subjects
ANTIOXIDANTS, RESPONSE surfaces (Statistics), SOLVENT extraction, REGRESSION analysis, XANTHONE, BENZOPHENONES, FLAVONOIDS, FUNCTIONAL foods
Abstract

Cratoxylum formosum ssp. pruniflorum (Kurz.) Gogel (Guttiferae), called kuding tea, is widely distributed in Southeast Asia. In this study, the constituents and biological activity of C. formosum ssp. pruniflorum were investigated. Extract of its leaves, roots and stems showed antioxidant and α-glucosidase inhibitory activity. Interestingly, comparison of the metabolite profiles of leaves, roots and stems of C. formosum ssp. pruniflorum by LC-MS analysis showed a great difference between the roots and leaves, whereas the roots and stems were quite similar. Purification of the roots and leaves of C. formosum ssp. pruniflorum through various chromatographic techniques resulted in the isolation of 25 compounds. The structures of isolated compounds were elucidated on the basis of spectroscopic analysis as 18 xanthones, 5 flavonoids, a benzophenone and a phenolic compound. Among them, a xanthone (16) and a benzophenone (19) were first reported from nature. Evaluation of biological activity revealed that xanthones had a potent α-glucosidase inhibitory activity, while flavonoids were responsible for the antioxidant activity. To maximize the biological activity, yield and total phenolic content of C. formosum ssp. pruniflorum, extraction conditions such as extraction solvent, time and temperature were optimized using response surface methodology with Box–Behnken Design (BBD). Regression analysis showed a good fit of the experimental data, and the optimal condition was obtained as MeOH concentration in EtOAc, 88.1%; extraction time, 6.02 h; and extraction temperature 60.0 °C. α-Glucosidase inhibitory activity, yield and total phenolic content under the optimal condition were found to be 72.2% inhibition, 10.3% and 163.9 mg GAE/g extract, respectively. These results provide useful information about C. formosum ssp. pruniflorum as functional foods for oxidative stress–related metabolic diseases. [ABSTRACT FROM AUTHOR]

Published
2023
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