• Title/Summary/Keyword: Ahn Jae-Hong

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Investigating the Immune-Stimulating Potential of β-Glucan from Aureobasidium pullulans in Cancer Immunotherapy

  • Jae-Hyeon Jeong;Dae-Joon Kim;Seong-Jin Hong;Jae-Hee Ahn;Dong-Ju Lee;Ah-Ra Jang;Sungyun Kim;Hyun-Jong Cho;Jae-Young Lee;Jong-Hwan Park;Young-Min Kim;Hyun-Jeong Ko
    • Biomolecules & Therapeutics
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    • v.32 no.5
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    • pp.556-567
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    • 2024
  • β-glucan, a polysaccharide found in various sources, exhibits unique physicochemical properties, yet its high polymerization limits clinical applications because of its solubility. Addressing this limitation, we introduce PPTEE-glycan, a highly purified soluble β-1,3/1,6-glucan derived from Aureobasidium pullulans. The refined PPTEE-glycan demonstrated robust immune stimulation in vitro, activated dendritic cells, and enhanced co-stimulatory markers, cytokines, and cross-presentation. Formulated as a PPTEE + microemulsion (ME), it elevated immune responses in vivo, promoting antigen-specific antibodies and CD8+ T cell proliferation. Intratumoral administration of PPTEE + ME in tumor-bearing mice induced notable tumor regression, which was linked to the activation of immunosuppressive cells. This study highlights the potential of high-purity Aureobasidium pullulans-derived β-glucan, particularly PPTEE, as promising immune adjuvants, offering novel avenues for advancing cancer immunotherapy.

Development of One-Stop Web Services (One-Stop Web Services 개발)

  • Cho, Hee-Hyung;Ahn, Sung-Soo;Ahn, Bu-Young;Park, Jae-Hong;Park, Hyung-Seon
    • Proceedings of the Korean Information Science Society Conference
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    • 2005.11b
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    • pp.223-225
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    • 2005
  • 근래 들어 생명과학 및 생명정보에 대한 관심이 높아지면서 활발한 연구 활동의 결과물로 많은 정보를 얻을 수 있게 되었다. 또한 방대한 생명정보를 분석할 수 있는 많은 알고리즘이 개발되었으며 웹 기술이 발달함에 따라 생명정보의 활용도가 높아져서 다양한 방법으로 정보서비스가 가능하게 되었다. 특히 XML, SOAP, WSDL, UDDI를 사용하는 Web Services는 분산 컴포넌트 기반의 컴퓨팅 기술로 최신의 기술이다. 이에, 바이오인포매틱스센터에서는 CCBB, NCBI, EBI, DDBJ 등의 사이트에서 배포한 Web Services에 접근하여 입력 값과 출력된 결과를 확인 및 유지하고, 객체들의 흐름을 볼 수 있는 프로그램으로 One-Stop Web Services를 개발하였다. One-Stop Web Services는 GUI 환경의 인터페이스로 사용자에게는 용이한 실행 환경을 제공하므로, Web Services 개발자에게 사용자 인터페이스 개발 부담을 줄일 수 있다.

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Regulation Fe65 localization to the nucleus by SGK1 phosphorylation of its Ser566 residue

  • Lee, Eun-Jeoung;Chun, Jae-Sun;Hyun, Sung-Hee;Ahn, Hye-Rim;Jeong, Jae-Myung;Hong, Soon-Kwang;Hong, Jin-Tae;Chang, In-Kyeong;Jeon, Hye-Yeon;Han, Yeon-Soo;Auh, Chung-Kyoon;Park, Jae-In;Kang, Sang-Sun
    • BMB Reports
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    • v.41 no.1
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    • pp.41-47
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    • 2008
  • Fe65 is characterized as an adaptor precursor (APP) through its PID2 element, as well as with the other members of the APP protein family. With the serum- and glucocorticoid-induced kinase 1 (SGK1) substrate specificity information, we found that the putative site of phosphorylation in Fe65 by SGK1 is present on its $Ser^{566}$ residue in $^{560}CRVRFLSFLA^{569}$(X60469). Thus, we demonstrated that Fe65 and the fluorescein-labeled Fe65 peptide $FITC-^{560}CRVRFLSFLA^{569}$ are phosphorylated in vitro by SGK1. Phosphorylation of the $Ser^{566}$ residue was also demonstrated using a $Ser^{566}$ phospho-specific antibody. The phospho Fe65 was found mainly in the nucleus, while Fe65 S556A mutant was localized primarily to the cytoplasm. Therefore, these data suggest that SGK1 phosphorylates the $Ser^{566}$ residue of Fe65 and that this phosphorylation promotes the migration of Fe65 to the nucleus of the cell.

Antiviral Activity of Hederasaponin B from Hedera helix against Enterovirus 71 Subgenotypes C3 and C4a

  • Song, JaeHyoung;Yeo, Sang-Gu;Hong, Eun-Hye;Lee, Bo-Ra;Kim, Jin-Won;Kim, JeongHoon;Jeong, HyeonGun;Kwon, YongSoo;Kim, HyunPyo;Lee, SangWon;Park, Jae-Hak;Ko, Hyun-Jeong
    • Biomolecules & Therapeutics
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    • v.22 no.1
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    • pp.41-46
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    • 2014
  • Enterovirus 71 (EV71) is the predominant cause of hand, foot and mouth disease (HFMD). The antiviral activity of hederasaponin B from Hedera helix against EV71 subgenotypes C3 and C4a was evaluated in vero cells. In the current study, the antiviral activity of hederasaponin B against EV71 C3 and C4a was determined by cytopathic effect (CPE) reduction method and western blot assay. Our results demonstrated that hederasaponin B and 30% ethanol extract of Hedera helix containing hederasaponin B showed significant antiviral activity against EV71 subgenotypes C3 and C4a by reducing the formation of a visible CPE. Hederasaponin B also inhibited the viral VP2 protein expression, suggesting the inhibition of viral capsid protein synthesis.These results suggest that hederasaponin B and Hedera helix extract containing hederasaponin B can be novel drug candidates with broad-spectrum antiviral activity against various subgenotypes of EV71.

Clinical Study on a Case of Transverse Myelitis (비증(痺證)으로 변증한 횡단성 척수염 환자에 대한 증례 보고)

  • Kim, Jeong-Eun;Kim, Su-Min;Yoon, Hyun-Min;Ahn, Chang-Beohm;Jang, Kyung-Jun;Kim, Cheol-Hong;Kim, Jae-Hong;Kim, Won-Il
    • Journal of Pharmacopuncture
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    • v.11 no.2
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    • pp.141-149
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    • 2008
  • Objectives This report intended to estimate effect taken by using Oriental medical method on the patient with Tranverse Myelitis. Methods From 28th April, 2006 to 19th June, 2006. The patient dignosed as a Transverse Myelitis receive acupuncture, moxibustion, cupping and physical therapy and herbal medication by estimating arthralgia syndrome(痺證). Results The patient's incipient symptoms-both lower limb paresthesia and weakness, voluntary urination and defecation-all were improved. Conclusions This study demonstrates that oriental medical treatment has respectable effect in improving as though we didn't exclude effect of western medical therapy on the patient with transverse myelitis. More research of transverse myelitis is needed.

An Algorithm of Localization by using the Score of Multiple Power Beacon Signals in Wireless Sensor Networks (센서 네트워크에서 다중 파워 비콘신호의 SCORE 이용한 위치추정 알고리즘)

  • Ahn, Hong-Beom;Lee, Pyeong-Jae;Hong, Jin-Pyo
    • Proceedings of the Korean Information Science Society Conference
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    • 2010.06d
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    • pp.165-169
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    • 2010
  • 무선 센서 네트워크에서 LBS(Location Based Services) 에 적합한 기술적인 요구사항이 증가하고 있다. 최근 LBS의 가장 기본이 되는 위치추정(Localization) 에 관련하여 많은 알고리즘이 제안되고 있지만 센서 네트워크를 위한 요구사항을 만족하지 못하고 있다. 본 논문에서는 센서 네트워크에서 5가지 주된 위치추정방식의 요구사항을 정의하고 이를 만족하는 SCORE 알고리즘을 제안한다. 고정노드는 다중 파워의 비콘신호를 전승하게 되며, 이때 고정노드는 센서노드에게 위치정보를 비콘 신호에 담아서 전승하게 되는데 이때 다중 비콘신호에 신호 순서에 해당하는 SCORE 라고 고정노드로부터 센서노드까지의 거리에 대한 값을 포함하여서 전승하게 된다. 여러 고정노드로부터 수신한 위치정보를 수집한 센서노드는 간단한 연산과정을 거쳐 자신의 위치를 분산적으로 추정하게 된다. CAB 위치추정 알고리즘의 2 가지 알고리즘을 동시에 사용하는 복잡성 문제와 Diffusion 알고리즘의 네트워크 외곽에서 발생하는 큰 위치추정 오류의 문제점을 SCORE 알고리즘에서는 해결하였다. 시뮬레이션 결과 SCORE 알고리즘은 독립적인 알고리즘 사용임에도 불구하고 CAB 위치추정 알고리즘과 비슷한 성능을 나타내었으며, Diffusion 알고리즘에서 발생한 네트워크 외곽 센서노드들의 오류를 평균 7% 이상 향상 시켰다.

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A study on the new high efficiency rectifier system (고효율 신형 정류시스템에 대한 고찰)

  • Kim, Gue-Hong;Jeong, Jae-Hoon;Cho, Man-Hyun;Ahn, Che-Hong
    • Proceedings of the KIEE Conference
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    • 1999.07g
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    • pp.3172-3174
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    • 1999
  • 교환기나 전송장치 등 각종 통신설비에 전원을 공급하기 위해서 정류기, 축전지 및 발전기 등의 전원설비가 사용되고 있다. 이들 중에서도 정류기는 통신설비에 직류전원을 공급하기 때문에 다른 전원설비 보 다도 신뢰성 및 안정성이 확보된 장치로 인식되어 왔다. 그러나 현재 사내전화국에 설치 운용중인 정류기는 교환 기별로 종류가 다양하여 유지보수에 어려움이 내재하고 있을 뿐만 아니라 통신망의 광대역화, 대용량화에 대처가 곤란하며 정류기를 전력실 또는 통신실에 집중해서 설치 운용하는 집중공급방식으로는 축전지의 만충전이 곤란하다. 또한 현재의 이러한 급전방식은 통신장치의 광대역화, 고도화 등 통신망의 급격한 발전과 함께 다음과 같은 문제점이 대두되고 있다. 첫째, 전력실에서 총괄하여 교류전력을 직류48V로 변환해서 급전하기 때문에 급전전류가 크게되고, 또한 전력실에서 통신실까지의 급전손실이 크다 둘째, 통신설비의 증감에 따른 전원설비의 증감이 어렵기 때문에 설비 가동율이 나쁘다 셋째, 전원설비의 고장에 의한 전화국 전체설비에 심각한 영향을 미칠수 있다 이러한 문제점을 해소하기 위하여 집중 및 분산급전방식으로 운용이 가능하며, 또한 모든 전원설비를 감시/제어하는 전원 집중관리 시스템과의 인터페이스 등이 가능한 정류시스템을 1997년부터 개발하였다. 본고에서는 신형 정류기와 기존의 정류기와의 성능 및 특성에 대해 비교하였고, 특히 경제성측면과 설치상련에 대해 비교분석 하였다. 또한 집중급전방식과 분산급전방식의 특성에 대해서도 서술하였다.

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Analysis of Cadmium in Urine using Flame and Flameless Atomic Absorption Spectrophotometry (불꽃 및 비불꽃원자흡수분광법을 이용한 뇨중 카드뮴 분석)

  • Ham, Yong-Gyu;Lee, Seok-Ki;Jeon, Jae-Hong;Joung, Chang-Ung;Son, Bu-Soon
    • Analytical Science and Technology
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    • v.12 no.5
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    • pp.355-359
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    • 1999
  • Trace cadmium was determined in urine by flame and nameless AAS. Inflame method, cadmium was extracted into MIBK from Cd-DDTC complex. In flameless method, samples were pretreated with 1%, Triton X-100. 1% $HNO_3$ and matrix modifier $Pd(NO_3)_2$. Analysis of cadmium was, performed at $450-750^{\circ}C$ ashing temperature by use of pyrocoated tubes. Results of analysis, flameless method superior in sample treatment and reproducibility to flame method and highest absorbance was obtained at $550^{\circ}C$ ashing temperature. 100 mg/L $Pd(NO_3)_2$ concentration. Proposed method were applied to the determination of cadmium in standard urine Lononorm-Metalle 3.

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Lichen Flora around the Korean Antarctic Scientific Station, King George Island, Antarctic

  • Kim, Ji-Hee;Ahn, In-Young;Hong, Soon-Gyu;Andreev, Mikhail;Lim, Kwang-Mi;Oh, Mi-Jin;Koh, Young-Jin;Hur, Jae-Seoun
    • Journal of Microbiology
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    • v.44 no.5
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    • pp.480-491
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    • 2006
  • As part of the long-term monitoring projects on Antarctic terrestrial vegetation in relation to global climate change, a lichen floristical survey was conducted around the Korean Antarctic Station (King Sejong Station), which is located on Barton Peninsula, King George Island, in January and February of 2006. Two hundred and twenty-five lichen specimens were collected and sixty-two lichen species in 38 genera were identified by morphological characteristics, chemical constituents, TLC analysis and ITS nucleotide sequence analysis.

Consideration of LED Saloon light for rolling stock (철도차량 LED 실내등 적용 검토)

  • Jeong, Hyun-Jeong;Kim, Shin-Gug;Ahn, Hong-Kwan;Kim, Jae-Gi
    • Proceedings of the KSR Conference
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    • 2011.05a
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    • pp.1457-1465
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    • 2011
  • The saloon light is the device that can offer convenience and comfort to the driver and passenger when the train is operated at night or in the tunnel. Generally, The fluorescent type saloon for the rolling stock have been used, but the problems that are short life and the generation of heat have been brought about because the saloon lihgts of rolling stock are supposed to operated continuously long time, and high power consumption. So, the development of new type of saloon lights has been requested in order to solve these problems. And recently the various LED type lights have been developed and LED type saloon lights for rolling stock also has been developed. Therefore, we survey the characteristic, function and needed condition of the LED type saloon lights for rolling stock, and analyze the good and bad point, and then research the complement of weak point. We want to find the direction and develop the design of future LED saloon light type.

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