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Rice pollen-specific OsRALF17 and OsRALF19 are essential for pollen tube growth

Journal of Integrative Plant Biology 2023年第9期65卷 2218-2236页

作者： Eui‐Jung Kim Ji‐Hyun Kim Woo‐Jong hong Eun Young Kim Myung‐Hee Kim Su Kyoung Lee cheol Woo Min Sun Tae Kim Soon Ki Park Ki‐hong Jung Yu‐Jin Kim Graduate School of Green Bio‐Science&Crop Biotech Institute Kyung Hee UniversityYongin 17104Republic of Korea Department of Life Science and Environmental Biochemistry Life and Industry Convergence Research InstitutePusan National UniversityMiryang 50463Republic of Korea Department of Smart Farm Science Kyung Hee UniversityYongin 17104Republic of Korea School of Applied Biosciences Kyungpook National UniversityDaegu 41566Republic of Korea Genomics Division Department of Agricultural Bio‐ResourcesNational Institute of Agricultural SciencesRural Development AdministrationJeonju 54874Republic of Korea Department of Plant Bioscience Pusan National UniversityMiryang 50463Republic of Korea Research Center for Plant Plasticity Seoul National UniversitySeoul 08826Republic of Korea

Pollen tube growth is essential for successful double fertilization, which is critical for grain yield in crop plants. Rapid alkalinization factors(RALFs) function as ligands for signal transduction during fertilization. However, functional studies on RALF in monocot plants are ***, we functionally characterized two pollen-specific RALFs in rice(Oryza sativa) using multiple clustered regularly interspaced palindromic repeats(CRISPR)/CRISPR-associated protein 9-induced loss-of-function mutants,peptide treatment, expression analyses, and tag reporter lines. Among the 41 RALF members in rice, OsRALF17 was specifically expressed at the highest level in pollen and pollen *** applied OsRALF17 or OsRALF19peptide inhibited pollen tube germination and elongation at high concentrations but enhanced tube elongation at low concentrations, indicating growth regulation. Double mutants of OsRALF17 and OsRALF19(ralf17/19) exhibited almost full male sterility with defects in pollen hydration, germination, and tube elongation,which was partially recovered by exogenous treatment with OsRALF17 peptide. This study revealed that two partially functionally redundant OsRALF17 and OsRALF19 bind to Oryza sativa male-gene transfer defective 2(OsMTD2) and transmit reactive oxygen species signals for pollen tube germination and integrity maintenance in rice. Transcriptomic analysis confirmed their common downstream genes, in osmtd2 and ralf17/19. This study provides new insights into the role of RALF, expanding our knowledge of the biological role of RALF in regulating rice fertilization.

关键词： CRISPR-Cas9 CrRLK1L monocot Oryza sativa pollen tube growth rapid alkalinization factor(RALF)

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Endoscopic resection using band ligation for esophageal SMT in less than 10mm

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World Journal of Gastroenterology 2015年第10期21卷 2982-2987页

作者： Joung Boom hong cheol Woong Choi Hyung Wook Kim Dae Hwan Kang Su Bum Park Su Jin Kim Dong Jun Kim Department of Internal Medicine Pusan National University School of Medicine and Research Institute for Convergence of Biomedical Science and Technology Pusan National University Yangsan Hospital

AIM:To evaluate the safety and feasibility of endoscopic resection using band ligation(EMR-B) for the diagnostic and therapeutic removal of tumors located in the esophageal subepithelial region having originated from the ***:From May 2009 to September 2014,after medical chart and endoscopic ultrasonography report review,a total of 15 esophageal tumors located in the submucosal layer were resected by *** symptom,location,pathology,complete resection rate,incidence of complications,incidence of minor complication,size,length of procedures time and follow up months were *** evaluate local recurrence at the resection site,periodic follow-up endoscopic examination was undertaken in all of the *** first endoscopic examination was performed about 6 mo after the endoscopic ***,the endoscopic follow up were scheduled ***:The mean age was 50.3 ± 9.67 *** mean tumor size was 6.93 ± 3.15 mm and most of the lesions size was between 5-10 mm in diameter(10/15,66.6%).In all patients,endoscopic en bloc resection was *** one patient,the vertical margin was *** mean procedural time was 8.86 ± 3.66 *** all patients,no evidence of severe complications such as perforation or bleeding *** complications such as chest pain(2/15,13.3%) and heartburn(3/15,13.3%) were reported but they symptoms were controlled by proton pump inhibitors,ulcermin and/or *** assessments of the removed specimens revealed 10 granular cell tumors(66.6%),4 leiomyomas(16.6%) and one lipoma(6.6%).No recurrence was observed during the mean follow up period of 45 ± 3.5 mo(range:5-64 mo).CONCLUSION:EMR-B might be considered safe and effective for the diagnosis and treatment of lesions measuring less than 10 mm in diameter.

关键词： Band ligation Endoscopic mucosal resection Esophag

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Needle-knife fistulotomy vs double-guidewire technique in patients with repetitive unintentional pancreatic cannulations

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World Journal of Gastroenterology 2015年第19期21卷 5918-5925页

作者： Su Jin Kim Dae Hwan Kang Hyung Wook Kim cheol Woong Choi Su Bum Park Byeong Jun Song Young Mi hong Department of Internal Medicine Medical Research Institute Pusan National University School of Medicine and Research Institute for Convergence of Biomedical Science and Technology Pusan National University Yangsan Hospital Pusan National University School of Medicine and Research Institute for Convergence of Biomedical Science and Technology Pusan National University Hospital

AIM: To compare the success rates and adverse events of early needle-knife fistulotomy(NKF) and double-guidewire technique(DGT) in patients with repetitive unintentional pancreatic ***: From a total of 1650 patients admitted for diagnostic or therapeutic endoscopic retrograde cholangiopancreatography(ERCP) at a single tertiary care hospital(Pusan National University Yangsan Hospital, Yangsan, South Korea) between January2009 and December 2012, 134(8.1%) patients with unsuccessful biliary cannulation after 5 min trial of conventional methods, together with 5 or more repetitive unintentional pancreatic cannulations, were enrolled in the study. Early NKF and DGT groups were assigned 67 patients each. In the DGT group, NKF was performed for an additional 7 min if successful cannulation was not ***: The success rates with early NKF andthe DGT were 79.1%(53/67) and 44.8%(30/67)(P< 0.001), respectively. The incidence of post-ERCP pancreatitis(PEP) was lower in the early NKF group than in the DGT group [4.5%(3/67) vs 14.9%(10/67),P = 0.041]. The mean cannulation times in the early NKF and DGT groups after assignment were 257 s and312 s(P = 0.013), ***: Our data suggest that early NKF should be considered as the first approach to selective biliary cannulation in patients with repetitive unintentional pancreatic cannulations.

关键词： Endoscopic retrograde cholangiopancreatography Cannulation Pancreatitis Needle knifefistulotomy Double guidewire technique

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Application of extracellular vesicles from mesenchymal stem cells promotes hair growth by regulating human dermal cells and follicles

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World Journal of Stem Cells 2022年第7期14卷 527-538页

作者： Ramya Lakshmi Rajendran Prakash Gangadaran Mi Hee Kwack Ji Min Oh Chae Moon hong Young KwanSung Jaetae Lee Byeong-cheol Ahn Department of Nuclear Medicine School of MedicineKyungpook National UniversityDaegu 41944South Korea BK21 FOUR KNU Convergence Educational Program of Biomedical Sciences for Creative Future Talents Department of Biomedical SciencesSchool of MedicineKyungpook National UniversityDaegu 41944South Korea Department of Immunology School of MedicineKyungpook National UniversityDaegu 41944South Korea Department of Nuclear Medicine Kyungpook National University HospitalDaegu 41944South Korea

BACKGROUND Dermal papillae(DP)and outer root sheath(ORS)cells play important roles in hair growth and regeneration by regulating the activity of hair follicle(HF)*** To investigate the effects of human mesenchymal stem cell-derived extracellular vesicles(hMSC-EVs)on DP and ORS cells as well as *** are known to regulate various cellular ***,the effects of hMSC-EVs on hair growth,particularly on human-derived HF cells(DP and ORS cells),and the possible mechanisms underlying these effects are *** hMSC-EVs were isolated and characterized using transmission electron microscopy,nanoparticle tracking analysis,western blotting,and flow *** activation of DP and ORS cells was analyzed using cellular proliferation,migration,western blotting,and real-time polymerase chain *** growth was evaluated ex vivo using human *** Wnt3a is present in a class of hMSC-EVs and associated with the EV ***-EVs promote the proliferation of DP and ORS ***,they translocateβ-catenin into the nucleus of DP cells by increasing the expression ofβ-catenin target transcription factors(Axin2,EP2 and LEF1)in DP *** with hMSC-EVs also promoted the migration of ORS cells and enhanced the expression of keratin(K)differentiation markers(K6,K16,K17,and K75)in ORS ***,treatment with hMSC-EVs increases hair shaft elongation in cultured human *** These findings suggest that hMSC-EVs are potential candidates for further preclinical and clinical studies on hair loss treatment.

关键词： Mesenchymal stem cells Extracellular vesicles Hair growth Dermal papillae Outer root sheath cells

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Utilizing hybrid faradaic mechanism via catalytic and surface interactions for high-performance flexible energy storage system

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Journal of Energy Chemistry 2023年第8期83卷 541-548,I0013页

作者： Dong-Gyu Lee Hyeonggeun Choi Yeonsu Park Min-cheol Kim Jong Bae Park Suok Lee Younghyun Cho Wook Ahn A-Rang Jang Jung Inn Sohn John hong Young-Woo Lee Department of Energy Engineering Soonchunhyang UniversityAsan 31538Republic of Korea Division of Physics and Semiconductor Science Dongguk University-SeoulSeoul 04620Republic of Korea Jeonju Centre Korea Basic Science InstituteJeonju 54907Republic of Korea Division of Electrical Electronic and Control EngineeringKongju National UniversityCheonan 31080Republic of Korea School of Materials Science and Engineering Kookmin UniversitySeoul 02707Republic of Korea

Improving the capacitance and energy density is a significant challenge while developing practical and flexible energy storage system(ESS).Redox mediators(RMs),as redox-active electrolyte additives,can provide additional energy storing capability via electrochemical faradaic contribution on electrodes for high-performance flexible ***,determining effective material combinations between electrodes and RMs is essential for maximizing surface faradaic redox reactions for energy-storage *** this study,an electrode-RM system comprising heterostructured hybrid(carbon fiber(CF)/MnO_(2)) faradaic electrodes and iodine RMs(I-RMs) in a redox-active electrolyte is *** CF/MnO_(2)with the 1-RMs(CF/MnO_(2)-I) induces dominant catalytic faradaic interaction with the I-RMs,significantly enhancing the surface faradaic kinetics and increasing the overall energy-storage *** CF/MnO_(2)-I ESSs show a 12.6-fold(or higher) increased volumetric energy density of 793.81 mWh L^(-1)at a current of 10 μA relative to ESSs using CF/MnO_(2)without I-RMs(CF/MnO_(2)).Moreover,the CF/MnO_(2)-I retains 93.1% of its initial capacitance after 10,000 cycles,validating the excellent ***,the flexibility of the ESSs is tested at different bending angles(180° to 0°),demonstrating its feasibility for flexible and high-wear ***,CF/MnO_(2)electrodes present a practical material combination for high-performance flexible energy-storage devices owing to the catalytic faradaic interaction with I-RMs.

关键词： Energy storage system Redox mediators Faradaic electrodes Catalytic interactions Mechanical stability

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Pattern of instent neointimal formation compared to native atherosclerosis in the coronary bifurcation lesions： volumetric intravascular ultrasound analysis

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Chinese Medical Journal 2013年第18期126卷 3505-3510页

作者： XU Jian-qiang Young Bin Song Joo-Yong Hahn Seung-Hyuk Choi Jin-Ho Choi LU Cheng-zhi Sang Hoon Lee Kyung pyo hong Jeung Euy Park Hyeon-cheol Gwon Division of Cardiology Department of Medicine Samsung MedicalCenter Sungkyunkwan University School of Medicine Seoul Korea Cardiovascular CenterTianjin First Central Hospital Tianjin 300192 China

Background No clinical study has systematically analyzed and compared circumferential neointimal and plaque distribution of stent neointimal proliferation and in native atherosclerotic plaques. This study aimed to investigate and compare the pattern of instent neointimal formation and native atherosclerosis in the coronary bifurcation lesions by volumetric analysis using systematic intravascular ultrasound （IVUS）. Methods We examined bifurcation lesions in native coronary artery （plaque group, n=102） and stented bifurcations at 9-month follow-up （neointima group, n=51） using volumetric IVUS analysis of both the main vessel （MV） and side branch （SB）. Three 5-mm segments were analyzed; the proximal MV （MVp）, distal MV （MVd） and SB ostium （SBo）. For each segment, volumetric analysis was performed in each of four quadrants （divided according to the branch takeoff and the geometric center of the lumen）; carinal, epicardial, abcarinal, and myocardial. The eccentricity index was defined as the ratio of the abcarinal plaque （or neointimal） volume to the carinal plaque （or neointimal） volume. Results The plaque distribution differed significantly between the four quadrants, with the largest in the abcarinal quadrant, followed by the myocardial, epicardial, and carinal quadrants. The distribution of neointima was similar in the MV, but the four quadrants in the SB did not differ significantly. The eccentricity indices of both the MVd （P 〈0.001） and SBo （P=-0.001） were significantly higher for the plaque group than the neointima group. Conclusions The distribution of neointimal proliferation seems to have a similar pattern to that of atherosclerotic plaque in native coronary arteries. Darticularlv in the main vessel, but the trend is less prominent.

关键词： atherosclerosis bifurcations plaque distribution neointimal distribution intravascular ultrasound

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Adaptive Rate Control Scheme for H.264/AVC

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Journal of Measurement Science and Instrumentation 2010年第2期1卷 192-195页

作者： Myoung-jin KIM Min-cheol hong School of Electronic Engineering Soongsil UniversitySeoul 156-743Korea

The purpose of this paper is to improve allocation of the number of bits without skipping the frame by accurately estimating the target bits in H. 264/AVC rate control. The scheme ImPoses an enhancement method of the target frame rate based on H. 264/AVC bit allocation. The enhancement uses a frame complexion estimation to improve the existing Mean Absolute Difference （MAD） complexity measurement. Bit allocation to each frame is not just computed by target frame rote but also adjusted by a combined frame complexity measure. Using the statistical characteristic, the scheme obtains change of occurrence bit about QP to apply the bit amount by QP from the video characteristic and apply it in the estimated bit amount of the current frame. Simulation results show that the proposed rate eontrol scheme achieves time saving of mine than 99% over existing rate control algorithm. Nevertheless, Peak Signal-to-Noise Ration （PSNR） and bit rate were almost the same as the performances.

关键词： computational complexity Mean Absolute Difference rote control Peak Signal-to-Noise Ration

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A Simple Adaptive Rate Control for H.264/AVC

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Journal of Measurement Science and Instrumentation 2010年第S1期1卷 151-154页

作者： Myoung-Jin Kim Min-cheol hong School of Electronic Engineering Soongsil University

The purpose of this paper is to improve allocation of the number of bits without skipping the frame by accurately estimating the target bits in H.264/AVC rate *** our scheme,we propose an enhancement method of the target frame rate based H.264/AVC bit *** enhancement uses a frame complexity estimation to improve the existing mean absolute difference(MAD)complexity measurement Bit allocation to each frame is not just computed by target frame rate but also adjusted by a combined frame complexity *** the statistical characteristic,we obtain change of occurrence bit about QP to apply the bit amount by QP from the video characteristic and applied in the estimated bit amount of the current frame. Simulation results show that the proposed rate control scheme could not only achieves time saving of more than 99%over existing rate control algorithm,but also increase the average PSNR of reconstructed video for around 0.02～0.78 dB in all the sequences.

关键词： H.264 Computational Complexity Mean Absolute Difference Rate Control Peak Signal-to-Noise Ration

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Quantization Skipping Method for H.264/AVC Video Coding

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Journal of Measurement Science and Instrumentation 2010年第3期1卷 247-249页

作者： Won-seon SONG Min-cheol hong School of Electronics Engineering Soongsil UniversitySeoul 156-743Korea

This paper presents a quantization skipping method for H. 264/AVC video coding standard. In order to reduce the conputational-cost of quantization process coming from integer discrete cosine transform of H. 264/AVC, a quantization skipping condition is derived by the analysis of integer transform and quantization procedures. The expeerimental results show that the proposed algorithm has the capability to reduce the computional cost about 10% -2.5%.

关键词： H. 264/AVC quantization skipping integer transform computational-cost

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Improved Rate Control Using Statistical Information in Unit-Layer for H.264/AVC

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Journal of Measurement Science and Instrumentation 2011年第3期2卷 256-259页

作者： Myoung-jin KIM Min-cheol hong School of Electronic Engineering Soongsil University

The purpose of this paper is to improve allocation of the number of bits by estimating the target bits in H.264/AVC rate *** the scheme,an enhancement method of the target unit-layer bit allocation is proposed,which uses a frame and unit complexity estimation to improve the existing mean absolute difference(MAD)complexity *** the statistical characteristics,we obtain change of occurrence bit about QP to apply the bit amount by QP from the video characteristics in the estimated bit amount of the current *** results show that not only the proposed rate control scheme could achieve time saving of more than 99% over existing rate control algorithm,but also PSNR and bit rate were almost the same as the performance in all the sequences.

关键词： bit rate control MAD unit-layer statistical information

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