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Aquatide Activation of SIRT1 Reduces Cellular Senescence through a SIRT1-FOXO1-Autophagy Axis
Lim, Chae Jin,Lee, Yong-Moon,Kang, Seung Goo,Lim, Hyung W.,Shin, Kyong-Oh,Jeong, Se Kyoo,Huh, Yang Hoon,Choi, Suin,Kor, Myungho,Seo, Ho Seong,Park, Byeong Deog,Park, Keedon,Ahn, Jeong Keun,Uchida, Yos The Korean Society of Applied Pharmacology 2017 Biomolecules & Therapeutics(구 응용약물학회지) Vol.25 No.5
Ultraviolet (UV) irradiation is a relevant environment factor to induce cellular senescence and photoaging. Both autophagy- and silent information regulator T1 (SIRT1)-dependent pathways are critical cellular processes of not only maintaining normal cellular functions, but also protecting cellular senescence in skin exposed to UV irradiation. In the present studies, we investigated whether modulation of autophagy induction using a novel synthetic SIRT1 activator, heptasodium hexacarboxymethyl dipeptide-12 (named as Aquatide), suppresses the UVB irradiation-induced skin aging. Treatment with Aquatide directly activates SIRT1 and stimulates autophagy induction in cultured human dermal fibroblasts. Next, we found that Aquatide-mediated activation of SIRT1 increases autophagy induction via deacetylation of forkhead box class O (FOXO) 1. Finally, UVB irradiation-induced cellular senescence measured by $SA-{\beta}-gal$ staining was significantly decreased in cells treated with Aquatide in parallel to occurring SIRT1 activation-dependent autophagy. Together, Aquatide modulates autophagy through SIRT1 activation, contributing to suppression of skin aging caused by UV irradiation.
Aquatide Activation of SIRT1 Reduces Cellular Senescence through a SIRT1-FOXO1-Autophagy Axis
( Chae Jin Lim ),( Yong-moon Lee ),( Seung Goo Kang ),( Hyung W. Lim ),( Kyong-oh Shin ),( Se Kyoo Jeong ),( Yang Hoon Huh ),( Suin Choi ),( Myungho Kor ),( Ho Seong Seo ),( Byeong Deog Park ),( Keedo 한국응용약물학회 2017 Biomolecules & Therapeutics(구 응용약물학회지) Vol.25 No.5
Ultraviolet (UV) irradiation is a relevant environment factor to induce cellular senescence and photoaging. Both autophagy- and silent information regulator T1 (SIRT1)-dependent pathways are critical cellular processes of not only maintaining normal cellular functions, but also protecting cellular senescence in skin exposed to UV irradiation. In the present studies, we investigated whether modulation of autophagy induction using a novel synthetic SIRT1 activator, heptasodium hexacarboxymethyl dipeptide-12 (named as Aquatide), suppresses the UVB irradiation-induced skin aging. Treatment with Aquatide directly activates SIRT1 and stimulates autophagy induction in cultured human dermal fibroblasts. Next, we found that Aquatide-mediated activation of SIRT1 increases autophagy induction via deacetylation of forkhead box class O (FOXO) 1. Finally, UVB irradiation-induced cellular senescence measured by SA-β-gal staining was significantly decreased in cells treated with Aquatide in parallel to occurring SIRT1 activation-dependent autophagy. Together, Aquatide modulates autophagy through SIRT1 activation, contributing to suppression of skin aging caused by UV irradiation.
Neuroprotective effects of Korean White ginseng and Red ginseng in an ischemic stroke mouse model
Myungho Jin,Kyung-Min Kim,Chiyeon Lim,Suin Cho,Young Kyun Kim 고려인삼학회 2022 Journal of Ginseng Research Vol.46 No.2
Background: Stroke is a neurological disorder characterized by brain tissue damage following a decrease in oxygen supply to brain due to blocked blood vessels. Reportedly, 80% of all stroke cases are classified as cerebral infarction, and the incidence rate of this condition increases with age. Herein, we compared the efficacies of Korean White ginseng (WG) and Korean Red Ginseng (RG) extracts (WGex and RGex, respectively) in an ischemic stroke mouse model and confirmed the underlying mechanisms of action. Methods: Mice were orally administered WGex or RGex 1 h before middle cerebral artery occlusion (MCAO), for 2 h; the size of the infarct area was measured 24 h after MCAO induction. Then, the neurological deficit score was evaluated and the efficacies of the two extracts were compared. Finally, their mechanisms of action were confirmed with tissue staining and protein quantification. Results: In the MCAO-induced ischemic stroke mouse model, WGex and RGex showed neuroprotective effects in the cortical region, with RGex demonstrating superior efficacy than WGex. Ginsenoside Rg1, a representative indicator substance, was not involved in mediating the effects of WGex and RGex. Conclusion: WGex and RGex could alleviate the brain injury caused by ischemia/reperfusion, with RGex showing a more potent effect. At 1,000 mg/kg body weight, only RGex reduced cerebral infarction and edema, and both anti-inflammatory and anti-apoptotic pathways were involved in mediating these effects.
Myungho Lee,You Lim Kim,Mun Sun Maeng,Youn Suk Lee 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
The remaining residue in the package after consuming the food products has recently been a major issue in the food industry due to the food waste or loss, and the recycling difficulty of packaging materials. Most liquid foods can easily adhere to the inner surface of the container and remain it leading to food-wasting. Superhydrophobic (SHPC) surface of the package may reduce the remaining portion of the residual liquid food. Surface coating on the package with waxes as the food safety compounds is an eco-friendly treatment of low surface energy hydrocarbons for providing SHPC properties. However, use of only waxes for the surface coating is limited due to the low adhesive forces and thermally unstable for hot food application. This study focuses on the development of liquid food sticky resistance polymeric film with SHPC properties. The coating package structure is fabricated with waxes and silica aerogel via spraying method on LLDPE film. SHPC property of the fabricated film is evaluated using static contact angle and durability test. The results show that the aerogel/wax coated films represent good SHPC properties which have up to 150o contact angle compared to the control.
AQUATIDE Plays a Role as Innovative Skin-Care Vaccine Through The Autophagy Induction
( Chaejin Lim ),( Myungho Kor ),( Seokjeong Yoon ),( Heungjae Kim ),( Kyungho Park ),( Keedon Park ) 한국피부장벽학회 2016 한국피부장벽학회지 Vol.18 No.2
Natural moisturizing factor (NMF) in the stratum corneum has a high moisture retaining efficacy, and plays a major role in the skin barrier function. Pyrrolidone carboxylic acid (PCA) is one of the major NMFs found in human skin. Aquatide, a PCA-mimetic peptide, improves the skin barrier function by stimulating filaggrin expression as well as reducing Trans-Epidermal Water Loss (TEWL) correlated with increased water retention and moisturization. Autophagy is the natural destructive mechanism that allows the orderly degradation and recycling of cellular damaged components. So, Increased autophagy delays ageing process and extends longevity. Sirtuin1 (SIRT1) is a nicotinamide adenine dinucleotide (NAD+)-dependent deacetylase functioning in the regulation of metabolism, cell survival and organismal lifespan. AQUATIDE alleviates ROS- and heavy metal-mediated senescence and cytotoxicity of cells by SIRT1-dependent autophagy. Furthermore, AQUATIDE reduces pollen-mediated PGE2 release and keeps the skin healthy during an allergic reaction against pollen treatment. In conclusion, AQUATIDE is considered as the first needle-free “skin-care vaccine” for various troubled skins including inflamed and irritated skin as well as aged skin.
Zang, Yunxiang,Lim, Myungho,Park, Beomseok,Hong, Seungbeom,Kim, Doohwan Korean Society for Molecular Biology 2008 Molecules and cells Vol.25 No.2
Indole glucosinolates (IG) play important roles in plant defense, plant-insect interactions, and stress responses in plants. In an attempt to metabolically engineer the IG pathway flux in Chinese cabbage, three important Arabidopsis cDNAs, CYP79B2, CYP79B3, and CYP83B1, were introduced into Chinese cabbage by Agrobacterium-mediated transformation. Overexpression of CYP79B3 or CYP83B1 did not affect IG accumulation levels, and overexpression of CYP79B2 or CYP79B3 prevented the transformed callus from being regenerated, displaying the phenotype of indole-3-acetic acid (IAA) overproduction. However, when CYP83B1 was overexpressed together with CYP79B2 and/or CYP79B3, the transformed calli were regenerated into whole plants that accumulated higher levels of glucobrassicin, 4-hydroxy glucobrassicin, and 4-methoxy glu-cobrassicin than wild-type controls. This result suggests that the flux in Chinese cabbage is predominantly channeled into IAA biosynthesis so that coordinate expression of the two consecutive enzymes is needed to divert the flux into IG biosynthesis. With regard to IG accumulation, overexpression of all three cDNAs was no better than overexpression of the two cDNAs. The content of neoglucobrassicin remained unchanged in all transgenic plants. Although glucobrassicin was most directly affected by overexpression of the transgenes, elevated levels of the parent IG, glucobrassicin, were not always accompanied by increases in 4-hydroxy and 4-methoxy glucobrassicin. However, one transgenic line producing about 8-fold increased glucobrassicin also accumulated at least 2.5 fold more 4-hydroxy and 4-methoxy glucobrassicin. This implies that a large glucobrassicin pool exceeding some threshold level drives the flux into the side chain modification pathway. Aliphatic glucosinolate content was not affected in any of the transgenic plants.