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Tetramic acid-motif natural products from a marine fungus Tolypocladium cylindrosporum FB06 and their anti-Parkinson activities

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Marine Life Science & Technology 2024年第1期6卷 84-92页

作者： Yuna Jung Chaesun Kwon Taeyeon Kim Jin Woo Lee Min-Kyoo shin Sang hee Shim Natural Products Research Institute College of PharmacySeoul National UniversitySeoul 08826Republic of Korea College of Pharmacy and Research Institute of Pharmaceutical Sciences Seoul National UniversitySeoul 08826Republic of Korea College of Pharmacy Duksung Women’s UniversitySeoul 01369Republic of Korea

Tetramic acid-containing natural products are attracting significantly increasing attention from biologists and chemists due to their intriguing structures and biological activities.In the present study,two new tetramic acid alkaloids tolypyridone I(1)and tolypyridone J(2),together with five known ones(3–7),were isolated from cultures of a marine fungus Tolypocladium cylindrosporum FB06 isolate obtained from a marine sediment in Beaufort sea of North Alaska.Their structures were elucidated using 1D,2D NMR,and HRESIMS.Their configurations were established on the basis of 1H coupling constants,ROESY correlations and DP4 calculations.Compound 2 was isolated as mixtures of rotational isomers with C-3 to C-7 axis between 4-hydroxy-2-pyridone and 1-ethyl-3,5-dimethylcyclohexane,hindering rotation.In our unbiased screening to discover neuroprotective compounds in an in vitro Parkinson’s disease(PD)model,SH-SY5Y dopaminergic cells were treated with isolated compounds followed by treatment with 1-methyl-4-phenylpyridinium(MPP^(+)),a parkinsonian neurotoxin.Among tested compounds,F-14329(7)significantly protected cells from MPP^(+)-induced cytotoxicity.MPP^(+)-mediated cell death is known to be related to the regulation of Bcl-2 family proteins,specifically the down-regulation of anti-apoptotic Bcl-2 and the up-regulation of pro-apoptotic Bax levels.Treatment with 2 mmol/L of MPP^(+)for 24 h significantly reduced Bcl-2 levels compared to control treated with vehicle.However,treatment with F-14329(7)attenuated such reduction.This study demonstrates that tetramic acid-motif compounds could be potential lead compounds for treating PD.

关键词： Tolypocladium cylindrosporum Tetramic acid Tolypyridone Parkinson’s disease

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Methane Emission from Rice Fields:Necessity for Molecular Approach for Mitigation

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Rice science 2024年第2期31卷 159-178页

作者： Sujeevan RAJENDRAN Hyeonseo PARK Jiyoung KIM Soon Ju PARK Dongjin shin Jong-hee LEE Young Hun SONG Nam-Chon PAEK Chul Min KIM Department of Horticulture Industry Wonkwang UniversityIksan 54538Korea Plant Molecular Biology and Biotechnology Research Center Gyeongsang National UniversityJinju 52828Korea Department of Southern Area Crop Science National Institute of Crop ScienceMiryang 50424Korea Department of Agricultural Biotechnology Seoul National UniversitySeoul 08826Korea Department of Plant Science Plant Genomics and Breeding InstituteResearch Institute of Agriculture and Life SciencesSeoul National UniversitySeoul 08826Korea

Anthropogenic methane emissions are a leading cause of the increase in global averagetemperatures,often referred to as global warming.Flooded soils play a significant role in methaneproduction,where the anaerobic conditions promote the production of methane by methanogenicmicroorganisms.Rice fields contribute a considerable portion of agricultural methane emissions,as riceplants provide both factors that enhance and limit methane production.Rice plants harbor both methaneproducingand methane-oxidizing microorganisms.Exudates from rice roots provide source for methaneproduction,while oxygen delivered from the root aerenchyma enhances methane oxidation.Studies haveshown that the diversity of these microorganisms depends on rice cultivars with some genes characterizedas harboring specific groups of microorganisms related to methane emissions.However,there is still aneed for research to determine the balance between methane production and oxidation,as rice plantspossess the ability to regulate net methane production.Various agronomical practices,such as fertilizerand water management,have been employed to mitigate methane emissions.Nevertheless,studiescorrelating agronomic and chemical management of methane with productivity are limited.Moreover,evidences for breeding low-methane-emitting rice varieties are scattered largely due to the absence ofcoordinated breeding programs.Research has indicated that phenotypic characteristics,such as rootbiomass,shoot architecture,and aerenchyma,are highly correlated with methane emissions.This reviewdiscusses available studies that involve the correlation between plant characteristics and methaneemissions.It emphasizes the necessity and importance of breeding low-methane-emitting rice varieties inaddition to existing agronomic,biological,and chemical practices.The review also delves into the idealphenotypic and physiological characteristics of low-methane-emitting rice and potential breeding techniques,drawing from studies conducted with diverse varieties,mutants,and transgenic p

关键词： methane emission rice breeding aerenchyma greenhouse gas radial oxygen loss

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High Na-ion conductivity andmechanical integrity of anion-exchanged polymeric hydrogel electrolytes for flexible sodium ion hybrid energy storage

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SusMat 2024年第1期4卷 140-153页

作者： JungWoo Hong Harpalsinh H.Rana Jeong hee Park Jun Su Kim Sang Joon Lee Gun Jang Tae Hoon Kang Kang Ho shin Sang Ha Baek Wooseok Yang Kwang Ho Kim Ju-Hyuk Lee Ho Seok Park School of Chemical Engineering Sungkyunkwan UniversitySuwonRepublic of Korea Clean Energy Research Center Korea Institute of Science and Technology(KIST)SeoulRepublic of Korea KIST-SKKU Carbon-Neutral Research Center Sungkyunkwan University(SKKU)SuwonRepublic of Korea SKKU Institute of Energy Science and Technology(SIEST) Sungkyunkwan UniversitySuwonRepublic of Korea COSMOS LAB/92 Jomaru-ro 385beon-gilBucheon-siRepublic of Korea SKKU Advanced Institute of Nano Technology(SAINT) Sungkyunkwan UniversitySuwonRepublic of Korea Department of Health Sciences and Technology Samsung Advanced Institute for Health Sciences and Technology(SAIHST)Sungkyunkwan UniversitySuwonRepublic of Korea

The polymeric gel electrolytes are attractive owing to their higher ionic conductivities than those of dry polymer electrolytes and lowered water activity for enlarged potential window.However,the ionic conductivity and mechanical strength of the Na-ion conducting polymeric gel electrolytes are limited by below 20 mS cm−1 and 2.2 MPa.Herein,we demonstrate Na-ion conducting and flexible polymeric hydrogel electrolytes of the chemically coupled poly(diallyldimethylammonium chloride)-dextrin-N,N′-methylene-bisacrylamide film immersed in NaClO_(4) solution(ex-DDA-Dex+NaClO_(4))for flexible sodium-ion hybrid capacitors(f-NIHC).In particular,the anion exchange reaction and synergistic interaction of ex-DDA-Dex with the optimum ClO_(4)−enable to greatly improve the ionic conductivity up to 27.63 mS cm−1 at 25◦C and electrochemical stability window up to 2.6 V,whereas the double networking structure leads to achieve both the mechanical strength(7.48 MPa)and softness of hydrogel electrolytes.Therefore,the f-NIHCs with the ex-DDA-Dex+NaClO_(4) achieved high specific and high-rate capacities of 192.04 F g^(−1)at 500 mA g^(−1)and 116.06 F g^(−1)at 10000 mA g^(−1),respectively,delivering a large energy density of 120.03Wh kg^(−1)at 906Wkg^(−1)and long cyclability of 70%over 500 cycles as well as demonstrating functional operation under mechanical stresses.

关键词： anion exchange chemistry flexible energy storage hybrid energy storage hydrogel electrolytes renewable electrolytes sodium storage

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Glucose-mediated mitochondrial reprogramming by cholesterol export at TM4SF5-enriched mitochondria-lysosome contact sites

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Cancer Communications 2024年第1期44卷 47-75页

作者： Ji Eon Kim So-Young Park Chulhwan Kwak Yoonji Lee Dae-Geun Song Jae Woo Jung Haesong Lee Eun-Ae shin Yangie Pinanga Kyung-hee Pyo Eun Hae Lee Wonsik Kim Soyeon Kim Chang-Duck Jun Jeanho Yun Sun Choi Hyun-Woo Rhee Kwang-Hyeon Liu Jung Weon Lee Department of Pharmacy College of PharmacySeoul National UniversitySeoulRepublic of Korea Research Institute of Pharmaceutical Sciences College of PharmacySeoul National UniversitySeoulRepublic of Korea BK21 FOUR Community-Based Intelligent Novel Drug Discovery Education Unit College of Pharmacy and Research Institute of Pharmaceutical SciencesKyungpook National UniversityDaeguRepublic of Korea Department of Chemistry Seoul National UniversitySeoulRepublic of Korea College of Pharmacy Chung-Ang UniversitySeoulRepublic of Korea Natural Product Informatics Research Center Korea Institute of Science and Technology(KIST)Gangneung-siGangwon-doRepublic of Korea School of Life Sciences Gwangju Institute of Science and Technology(GIST)GwangjuRepublic of Korea Department of Biochemistry College of MedicineDong-A UniversityBusanRepublic of Korea Global AI Drug Discovery Center College of Pharmacy and Graduate School of Pharmaceutical SciencesEwha Womans UniversitySeoulRepublic of Korea Interdisciplinary Program in Genetic Engineering Seoul National UniversitySeoulRepublic of Korea

Background:Transmembrane 4 L six family member 5(TM4SF5)translocates subcellularly and functions metabolically,although it is unclear how intracellu-lar TM4SF5 translocation is linked to metabolic contexts.It is thus of interests to understand how the traffic dynamics of TM4SF5 to subcellular endosomal membranes are correlated to regulatory roles of metabolisms.Methods:Here,we explored the metabolic significance of TM4SF5 localization at mitochondria-lysosome contact sites(MLCSs),using in vitro cells and in vivo animal systems,via approaches by immunofluorescence,proximity labelling based proteomics analysis,organelle reconstitution etc.Results:Upon extracellular glucose repletion following depletion,TM4SF5 became enriched at MLCSs via an interaction between mitochondrial FK506-binding protein 8(FKBP8)and lysosomal TM4SF5.Proximity labeling showed molecular clustering of phospho-dynamic-related protein I(DRP1)and certain mitophagy receptors at TM4SF5-enriched MLCSs,leading to mitochondrial fis-sion and autophagy.TM4SF5 bound NPC intracellular cholesterol transporter 1(NPC1)and free cholesterol,and mediated export of lysosomal cholesterol to mitochondria,leading to impaired oxidative phosphorylation but intact tri-carboxylic acid(TCA)cycle andβ-oxidation.In mouse models,hepatocyte Tm4sf5 promoted mitophagy and cholesterol transport to mitochondria,both with positive relations to liver malignancy.Conclusions:Our findings suggested that TM4SF5-enriched MLCSs regu-late glucose catabolism by facilitating cholesterol export for mitochondrial reprogramming,presumably while hepatocellular carcinogenesis,recapitulating aspects for hepatocellular carcinoma metabolism with mitochondrial repro-gramming to support biomolecule synthesis in addition to glycolytic energetics.

关键词： cholesterol fluorescent imaging glucose catabolism hepatocellular carcinogenesis mem-brane contact sites mitochondria function mitophagy oxidative phosphorylation protein-protein interaction tetraspanin

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Comparative efficacy and optimal duration of first-line antibiotic regimens for acute otitis media in children and adolescents:a systematic review and network meta-analysis of 89 randomized clinicaltrials

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World Journal of Pediatrics 2024年第3期20卷 219-229页

作者： Min Seo Kim Jae Han Kim Seohyun Ryu Seung Won Lee Dong Keon Yon Eunyoung Kim Ai Koyanagi Elena Dragioti Jae Il shin Lee Smith Samsung Advanced Institute forHealth Sciences&Technology(SAIHST) Samsung Medical CenterSungkyunkwan UniversitySeoulRepublic of Korea Yonsei University Collegeof Medicine SeoulRepublicof Korea Department of Precision Medicine Sungkyunkwan University School of MedicineSuwonRepublic of Korea Center for Digital Health Medical Science Research InstituteKyung Hee University College of MedicineSeoulRepublic of Korea Evidence-Based Research Laboratory Department of Clinical Pharmacy and Pharmaceutical CareCollege of PharmacyChung-Ang UniversitySeoulRepublic of Korea Parc Sanitari Sant Joan de Deu/CIBERSAM/ISCIII Universitat de BarcelonaFundacio Sant Joan de Déu.Sant Boi de LlobregatBarcelonaSpain ICREA Pg.Lluis Companys 23BarcelonaSpain Pain and Rehabilitation Centre and Department of Medical and Health SciencesLinkoping University58185 LinkopingSweden Department of Pediatrics Yonsei University College of MedicineYonsei-ro 50Seodaemun-gu8044Seoul 03722Republic of Korea Centre for Health Performanceand WellbeingAnglia Ruskin UniversityCambridge CB11PTUK Research Laboratory Psychology of Patients Families&Health ProfessionalsDepartment of NursingSchool of Health SciencesUniversity of IoanninaIoannina 45500Greece

Introduction Antibiotic use for acute otitis media(AOM)is one of the major sources of antimicrobial resistance.However,the effective minimal antibiotic duration for AOM remains unclear.Moreover,guidelines often recommend broad ranges(5-10 days)of antibiotic use,yet the clinical impact of such a wide window has not been assessed.Methods We systematically searched PubMed/MEDLINE,Embase,Scopus,Web of Science,and Cochrane Library from database inception to 6 October 2021.Network meta-analysis was conducted on randomized controlled trials that assessed antibiotic treatment for AOM in children(PROSPERO CRD42020196107).Results For amoxicillin and amoxicillin-clavulanate,7-day regimens were noninferior to 10-day regimens in clinical responses[amoxicillin:risk ratio(RR)0.919(95%CI 0.820-1.031),amoxicillin-clavulanate:RR 1.108(0.957-1.282)],except for≤2 years.For the third-generation cephalosporins,7-day and 10-day regimens had similar clinical responses compared to placebo[7-day:RR 1.420(1.190-1.694),10-day:RR 1.238(1.125-1.362)compared to placebo].However,5-day regimens of amoxicillin-clavulanate and third-generation cephalosporins were inferior to 10-day regimens.Compared to amoxicillin,a shorter treatment duration was tolerable with amoxicillin-clavulanate.Conclusions Our findings indicated that 1O days of antibiotic use may be unnecessarily long,while the treatment duration should be longer than 5 days.Otherwise,5-day regimens would be sufficient for a modest treatment goal.Our findings revealed that the current wide range of recommended antibiotic durations may have influenced the clinical outcome of AOM,and a narrower antibiotic duration window should be re-established.

关键词： Amoxicillin-potassium Amoxicillin Antibacterial agents Cephalosporins Duration of therapy

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Studying empathy behavior in the mouse

Studying empathy behavior in the mouse

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中国神经科学学会第九届全国学术会议暨第五次会员代表大会

作者： hee-sup shin Brain Science Institute Korea Institute of Science and Technology

Fear can be acquired vicariously through social observation of others suffering from aversive stimuli.We have developed a robust assay in which a mouse can be conditioned for fear associated with a context without direct experience of aversive stimulus(unconditioned stimulus) but by observing other mice(demonstrator) receiving repetitive foot shocks.The degree of the conditioning was increased when the demonstrator mouse was related to the observer mouse,such as siblings or mating partners.These findings suggest that this observational fear learning is mediated by empathy.Using local inactivation techniques,we showed that anterior cingulate cortex(ACC) and parafascicular or mediodorsal thalamic nuclei,which comprise the medial pain system for pain affection,are critically involved in this observational fear learning,whereas inactivation of sensory thalamic nuclei had no effect.During the observational fear learning,the ACC neuronal activities were increased and synchronized with those of the lateral amygdala at the theta rhythm frequency.Using the local gene deletion techniques,we also showed that Cav1.2 Ca channels in the ACC is required for observational fear learning,suggesting the involvement of Cav1.2 channels of the ACC in this empathy fear.Currently,we are trying to define further the circuits underlying the cortical mechanism for this social learning behavior.

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Uterine rupture due to adenomyosis in an adolescent:A case report and review of literature

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World Journal of Clinical Cases 2023年第32期11卷 7888-7894页

作者： Nah Ihm Kim Ji shin Lee Jong hee Nam Department of Pathology Chonnam National University HospitalGwangju 61469South Korea Department of Pathology Chonnam National University Hwasun HospitalHwasun 58128South Korea Department of Pathology Chonnam National University Medical SchoolGwangju 61469South Korea

BACKGROUND Uterine rupture is a fatal medical complication with a high mortality rate.Most cases of uterine rupture occur in late pregnancy or during labor and are mainly related to uterine scarring due to previous surgical procedures.Adenomyosis is a possible risk factor for uterine rupture.However,spontaneous uterine rupture due to severe adenomyosis in a non-gravida-teenaged female has not been reported in the literature to date.CASE SUMMARY A 16-year-old girl was referred to our hospital for acute abdominal pain and hypovolemic shock with a blood pressure of 90/50 mmHg.Radiologic studies revealed a huge endometrial mass with multiple nodules in the lung,suggesting lung metastasis.The patient underwent an emergency total hysterectomy and wedge resection of the lung nodules.Histologically,the uterus showed diffuse adenomyosis with glandular and stromal dissociation.Lung nodules were endometrioma with massive hemorrhage.Immunohistochemistry demonstrated that the tumor cells were positive for PAX8,ER,and PR expression,leading to a final diagnosis of pulmonary endometriosis and uterine adenomyosis.Following surgery,the patient remains in good condition without recurrence.CONCLUSION This is the first case of spontaneous uterine rupture due to adenomyosis in a nongravida adolescent.

关键词： Uterus Adenomyosis Malignancy Endometrioma Case report

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Effects of electroacupuncture on the functionality of NG2-expressing cells in perilesional brain tissue of mice following ischemic stroke

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Neural Regeneration Research 2022年第7期17卷 1556-1565页

作者： Hong Ju Lee Da hee Jung Nam Kwen Kim Hwa Kyoung shin Byung Tae Choi Department of Korean Medical Science School of Korean MedicinePusan National UniversityYangsanRepublic of Korea Graduate Training Program of Korean Medicine for Healthy Aging Pusan National UniversityYangsanRepublic of Korea Department of Korean Ophthalmology Otolaryngology and DermatologySchool of Korean MedicinePusan National UniversityYangsanRepublic of Korea

Neural/glial antigen 2(NG2)-expressing cells has multipotent stem cell activity under cerebral ischemia.Our study examined the effects of electroacupuncture(EA)therapy(2 Hz,1 or 3 mA,20 minutes)at the Sishencong acupoint on motor function after ischemic insult in the brain by investigating the rehabilitative potential of NG2-derived cells in a mouse model of ischemic stroke.EA stimulation alleviated motor deficits caused by ischemic stroke,and 1 mA EA stimulation was more efficacious than 3 mA EA stimulation or positive control treatment with edaravone,a free radical scavenger.The properties of NG2-expressing cells were altered with 1 mA EA stimulation,enhancing their survival in perilesional brain tissue via reduction of tumor necrosis factor alpha expression.EA stimulation robustly activated signaling pathways related to proliferation and survival of NG2-expressing cells and increased the expression of neurotrophic factors such as brain-derived neurotrophic factor,tumor growth factor beta,and neurotrophin 3.In the perilesional striatum,EA stimulation greatly increased the number of NG2-expressing cells double-positive for oligodendrocyte,endothelial cell,and microglia/macrophage markers(CC1,CD31,and CD68).EA therapy also greatly activated brain-derived neurotrophic factor/tropomyosin receptor kinase B and glycogen synthase kinase 3 beta signaling.Our results indicate that EA therapy may prevent functional loss at the perilesional site by enhancing survival and differentiation of NG2-expressing cells via the activation of brain-derived neurotrophic factor-induced signaling,subsequently ameliorating motor dysfunction.The animal experiments were approved by the Animal Ethics Committee of Pusan National University(approval Nos.PNU2019-2199 and PNU2019-2884)on April 8,2019 and June 19,2019.

关键词： brain-derived neurotrophic factor differentiation electroacupuncture motor function neural/glial antigen 2 perilesional striatum stroke survival

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A unique and well-designed 2D graphitic carbon nitride with sponge-like architecture for enhanced visible-light photocatalytic activity

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Journal of Materials Science & Technology 2023年第28期159卷 99-111页

作者： Mahdieh Razi Asrami Milad Jourshabani Min hee Park Daiha shin Byeong-Kyu Lee Department of Civil and Environment Engineering University of UlsanDaehakro 93NamguUlsan 680-749Republic of Korea Western Seoul Center Korea Basic Science InstituteSeoul 03759Republic of Korea

A unique and well-designed 2D graphitic carbon nitride(g-CN)with sponge-like architecture has been successfully synthesized by engineering supramolecular self-assembly and well-organized SiO 2 nanoparti-cles.The resulting material showed great optical and textural characteristics with plenty of open and uni-form pores,which are very helpful whether for multiple light scattering or mass transfer.The formation of boosted delocalizedπ-conjugated electrons at the molecular level and condensed heptazine building blocks result in enhanced carrier density and charge transfer dynamics.Optical emission spectroscopy and time-resolved fluorescence lifetime(TRPL)strongly confirmed the enhancement of light harvesting and prolonged charge carrier lifetime.The optimized sample exhibited a degradation performance of 95%of bisphenol A(BPA,10 mg L-1)after 60 min under visible-light irradiation at pH=5.All the scavenging experiments,probing experiments as well as electron paramagnetic resonance(EPR)confirm that•O 2-is the dominant reactive species that fragments bisphenol A.Interestingly,density functional theory(DFT)calculations unveil that the BPA interaction with a modified g-CN containing porous structure is energeti-cally more favorable than non-porous pure g-CN.Moreover,the toxicity assessment showed that the final degradation products were placed in the non-harmful category based on acute and chronic toxicity.This study presents a promising strategy to modify the g-CN properties and provides an efficient technique for boosting its visible-light photocatalytic activity.

关键词： Sponge-like Carbon nitride Photocatalysis Visible-light

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Primary duodenal dedifferentiated liposarcoma:A case report and literature review

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World Journal of Clinical Cases 2022年第6期10卷 2007-2014页

作者： Nah Ihm Kim Ji shin Lee Chan Choi Jong hee Nam Yoo Duk Choi hee Joon Kim Sung Sun Kim Department of Pathology Chonnam National University HospitalGwangju 61469South Korea Department of Pathology Chonnam National University Hwasun HospitalHwasun 58128South Korea Department of Surgery Chonnam National University HospitalGwangju 61469South Korea

BACKGROUND Dedifferentiated liposarcoma(DDLPS)is an extremely rare neoplasm that exhibits various morphologies.The tumor is characterized by immunoreactivity to MDM2 and CDK4 and can be confirmed by detecting MDM2 amplification via fluorescence in situ hybridization(FISH).Herein,we report an unusual case of DDLPS arising from the duodenum.CASE SUMMARY A 64-year-old man presented with repeated abdominal pain and weight loss.Radiologic studies revealed a mass of the duodenum involving the pancreas.The patient was treated with pylorus-preserving pancreaticoduodenectomy.Histologically,the tumor showed a high-grade sarcoma.Immunohistochemistry demonstrated that the tumor cells were positive for MDM2 and CDK4 expression.MDM2 amplification was detected via FISH,leading to the final diagnosis of DDLPS.Following surgery,the patient was treated in the intensive care unit due to peritonitis,and died 60 d after surgery.CONCLUSION To the best of the authors’knowledge,this is the first case of primary duodenal DDLPS in Korea and the third case in the English-language literature.Care must be taken not to misdiagnose DDLPS as another high-grade tumor.Liposarcoma should be in the differential diagnosis list.

关键词： Liposarcoma Primary Small bowel Duodenum Immunohistochemistry Case report

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