Specific anti-tumor activities in venom peptides of lesser paper wasp Parapolybia varia

Kyungjae Andrew Yoon,Kyungmun Kim,A-Young Kim,Young Han Park,Woo Young Bang,Chang Mu Kim,Young Ho Koh,Si Hyeock Lee 한국응용곤충학회 2016 한국응용곤충학회 학술대회논문집 Vol.2016 No.04

The lesser paper wasp, Parapolybia varia, belongs to large subfamily Polistinae and is distributed in Middle East, the Indo-Papuan region and East Asia. P. varia is known to become aggressive when disturbed for defending their colonies, resulting in fatal envenomation. Vespid chemotactic peptide (VCP) and vespakinin have recently been determined to be the top two genes most abundantly transcribed in venom glands of P. varia. To investigate the pharmacological and toxicological properties of VCP and vespakinin, their antitumor, antimicrobial, and cytotoxic activities were evaluated. VCP exhibited a significantly high antitumor activity against ovarian tumor cell SK-OV-3 at 100 M. VCP also showed higher hemolytic activity than vespakinin. Antimicrobial activity was only observed with VCP against yeast Candida albicans at 1 mM. Since VCP showed a relatively low hemolytic activity but a considerable level of antitumor activity, it has further merits to be exploited as a potential antitumor agent with reduced side effects on normal cells.

PLCγ1 in dopamine neurons critically regulates striatal dopamine release via VMAT2 and synapsin III

Kim Hye Yun,Lee Jieun,Kim Hyun-Jin,Lee Byeong Eun,Jeong Jaewook,Cho Eun Jeong,Jang Hyun-Jun,Shin Kyeong Jin,Kim Min Ji,Chae Young Chan,Lee Seung Eun,Myung Kyungjae,Baik Ja-Hyun,Suh Pann-Ghill,Kim Jae- 생화학분자생물학회 2023 Experimental and molecular medicine Vol.55 No.-

Dopamine neurons are essential for voluntary movement, reward learning, and motivation, and their dysfunction is closely linked to various psychological and neurodegenerative diseases. Hence, understanding the detailed signaling mechanisms that functionally modulate dopamine neurons is crucial for the development of better therapeutic strategies against dopamine-related disorders. Phospholipase Cγ1 (PLCγ1) is a key enzyme in intracellular signaling that regulates diverse neuronal functions in the brain. It was proposed that PLCγ1 is implicated in the development of dopaminergic neurons, while the physiological function of PLCγ1 remains to be determined. In this study, we investigated the physiological role of PLCγ1, one of the key effector enzymes in intracellular signaling, in regulating dopaminergic function in vivo. We found that cell type-specific deletion of PLCγ1 does not adversely affect the development and cellular morphology of midbrain dopamine neurons but does facilitate dopamine release from dopaminergic axon terminals in the striatum. The enhancement of dopamine release was accompanied by increased colocalization of vesicular monoamine transporter 2 (VMAT2) at dopaminergic axon terminals. Notably, dopamine neuron-specific knockout of PLCγ1 also led to heightened expression and colocalization of synapsin III, which controls the trafficking of synaptic vesicles. Furthermore, the knockdown of VMAT2 and synapsin III in dopamine neurons resulted in a significant attenuation of dopamine release, while this attenuation was less severe in PLCγ1 cKO mice. Our findings suggest that PLCγ1 in dopamine neurons could critically modulate dopamine release at axon terminals by directly or indirectly interacting with synaptic machinery, including VMAT2 and synapsin III.

Macrophage-colony Stimulating Factor Enhances MHC -restricted Presen tation of Exogenous Antigen in DC2.4 and BM -derived Dendritic Cells

KIM Kyungjae,HAN Shinha,CHO Kyunhgae,SONG Youngcheon,LEE Young-Hee,LEE Young-Ran,LEE Chong- Kil,KIM Hyunyul,KIM Kwanghee 大韓藥學會 2005 大韓藥學會 總會 및 學術大會 Vol.2005 No.2

FLT3 expression and IL10 promoter polymorphism in acute myeloid leukemia with RUNX1-RUNX1T1

Kim, Myungshin,Kim, Jiyeon,Kim, Jung Rok,Han, Eunhee,Park, Joonhong,Lim, Jihyang,Kim, Yonggoo,Han, Kyungja,Kim, Hee-Je,Min, Woo-Sung,Cho, Bin Springer-Verlag 2015 Molecular biology reports Vol.42 No.2

Auranofin inhibits cross-presentation of exogenous antigen associated with class I MHC molecule and inflammation response

KIM Kyungjae,LEE Cheong- Kill,KWON Jeunghak,KIM Kwanghee,KIM Hyunyul,SONG Youngcheon,HAN Shinha 大韓藥學會 2006 大韓藥學會 總會 및 學術大會 Vol.2006 No.1

Germline <i>CEBPA</i> mutations in Korean patients with acute myeloid leukemia

Kim, Hoon Seok,Han, Eunhee,Jang, Woori,Kim, Myungshin,Kim, Yonggoo,Han, Kyungja,Kim, Hee-Je,Cho, Bin Elsevier 2019 Leukemia research Vol.76 No.-

Surface-enhanced localized surface plasmon resonance biosensing of avian influenza DNA hybridization using subwavelength metallic nanoarrays

Kim, Shin Ae,Byun, Kyung Min,Kim, Kyujung,Jang, Sung Min,Ma, Kyungjae,Oh, Youngjin,Kim, Donghyun,Kim, Sung Guk,Shuler, Michael L,Kim, Sung June IOP Pub 2010 Nanotechnology Vol.21 No.35

<P>We demonstrated enhanced localized surface plasmon resonance (SPR) biosensing based on subwavelength gold nanoarrays built on a thin gold film. Arrays of nanogratings (1D) and nanoholes (2D) with a period of 200 nm were fabricated by electron-beam lithography and used for the detection of avian influenza DNA hybridization. Experimental results showed that both nanoarrays provided significant sensitivity improvement and, especially, 1D nanogratings exhibited higher SPR signal amplification compared with 2D nanohole arrays. The sensitivity enhancement is associated with changes in surface-limited reaction area and strong interactions between bound molecules and localized plasmon fields. Our approach is expected to improve both the sensitivity and sensing resolution and can be applicable to label-free detection of DNA without amplification by polymerase chain reaction. </P>

Effects of SBF-land SBF-2, protein components of Cordyceps militaris, on macrophage activation

KIM Kyungjae,HAN Shinha,LEE Seungjeong,KIM Dong-Joo,SONG Youngcheon,KIM Hyunyul,KIM Kwanghee,KWON Jeunghak 大韓藥學會 2006 大韓藥學會 總會 및 學術大會 Vol.2006 No.1

A micro-computed tomographic study of remaining filling materials of two bioceramic sealers and epoxy resin sealer after retreatment

Kim, KyungJae,Kim, Da Vin,Kim, Sin-Young,Yang, SungEun The Korean Academy of Conservative Dentistry 2019 Restorative Dentistry & Endodontics Vol.44 No.2

Objective: This study evaluated the presence of residual root canal filling material after retreatment using micro-computed tomography (micro-CT). Materials and Methods: Extracted human teeth (single- and double-rooted, n = 21/each; C-shaped, n = 15) were prepared with ProFile and randomly assigned to three subgroups for obturation with gutta-percha and three different sealers (EndoSeal MTA, EndoSequence BC sealer, and AH Plus). After 10 days, the filling material was removed and the root canals were instrumented one size up from the previous master apical file size. The teeth were scanned using micro-CT before and after retreatment. The percentage of remaining filling material after retreatment was calculated at the coronal, middle, and apical thirds. Data were analyzed using the Kruskal-Wallis test and Mann-Whitney U test with Bonferroni post hoc correction. Results: The tested sealers showed no significant differences in the percentage of remaining filling material in single- and double-rooted teeth, although EndoSeal MTA showed the highest value in C-shaped roots (p < 0.05). The percentage of remaining filling material of AH Plus and EndoSeal MTA was significantly higher in C-shaped roots than in single- or double-roots (p < 0.05), while that of BC sealer was similar across all root types. EndoSeal MTA showed the highest values at the apical thirds of single- and double-roots (p < 0.05); otherwise, no significant differences were observed among the coronal, middle, and apical thirds. Conclusions: Within the limitations of this study, a large amount of EndoSeal MTA remained after retreatment, especially in C-shaped root canals.

한국인의 급성 림프구성 백혈병과 HLA 연관성

이은정,윤정숙,김명신,임지향,김용구,한경자,김학기,민우성,김춘추,김원일 대한조혈모세포이식학회 2000 대한조혈모세포이식학회지 Vol.5 No.2

배경:주조직 적합항원 복합체(Major Histocompatibility Complex : MHC)는 쥐에서 처음 이식 항원으로 발견된 이래 이식 면역 분야에서 광범위하게 연구되어 왔으며, 면역 반응을 조절하는 주요 유전자로서 감염, 종양, 자가면역 질환 등의 발생에 관여한다. 사람에서 자가 면역 질환과 HLA 연관성이 증명되어 있으나, 백혈병에서 HLA 연관성에 관한 연구는 드물며 대상군 수가 유의한 결론을 얻기에 부족하다. 본 연구에서는 급성 림프구성 백혈병(ALL) 환자를 대상으로 HLA class I, II 항원 및 2-유전자좌 일배체형 빈도를 구하고, 이를 정상 대조군과 비교하는 통계적 방법으로 ALL군과 연관된 HLA 항원 및 일배체형이 있는지 살펴보고, ALL군은 FAB 분류와 면역 표현형 분류에 따른 아군으로 분류하여 각 아군과 연관된 HLA 항원 및 일배체형을 관찰함으로써 ALL 군과 HLA의 연관성을 규명해 보고자 하였다. 방법:1991년 1월부터 1998년 7월까지 성모병원에 내원하여 미세림프구독성검사를 이용한 혈청학적 방법으로 HLA Class I, II 항원 형별 검사를 실시한 222례의 ALL 환자를 대상으로 하여 FAB 분류 및 면역 표현형 아군에서 HLA 항원 빈도와 유전자 빈도를 구하고, 항원 빈도를 대조군과 비교하여 Haldane‘s 법에 따라 상대 위험도를 구하고 chi-square method로 유의성을 검정하였다. ALL 각 질환군과 아군에서 square root 법을 이용하여 HLA A-B, C-B, B-DR 2-유전자좌 일배체형 빈도를 구하고, 이를 대조군과 비교하여 chi-square 법으로 유의성을 검정하였다. 결과:1) Cw8이 ALL군에서 RR 0.12로 매우 감소하여 강한 연관성 정도를 나타냈고, p-value 0.001 이하의 높은 통계적 유의성을 나타냈다. 이는 Cw8이 ALL 발생에 저항성을 나타내는 유전자이거나, 저항성을 나타내는 다른 유전자에 linkage되어있을 가능성을 시사하며, 또는 Cw8이 leukemia virus 등 외부 항원에 대해 증가된 면역 반응을 암호화하는 유전자이거나, 면역 반응을 조절하는 다른 유전자에 linkage되어있을 가능성이나, Cw8이 면역 감시 기능에 주요 역할을 담당하는 항원일 가능성을 시사한다. 2) Cw3이 ALL군에서 유의하게 증가하였고 p-value 0.001 이하의 통계적 유의성을 나타내어, Cw3이 급성 림프구성 백혈병 발생을 예측하는 표지자가 될 수 있을 것으로 사료되었다. 3) B-blank와 DR-blank 유전자 빈도가 ALL 군에서 증가하였으며, 특히 이 현상은 DR locus에서 현저하으며 이는 ALL 질환군에서 B와 DR 항원의 동형접합체의 증가 때문이거나, 대립유전자의 변형이나 소실로 인하여 검출되지 않은 항원이 증가한 때문으로 사료된다. 4) FAB 분류 및 면역 표현형, 임상적 아군과 연관된 HLA 항원들이 검출되었으며, 특히 A11, B62, DR4는 T-cell 면역 표면형과 높은 연관성을 나타냈고, 이중 DR4는 CD3과 100%의 일치율을 보여 DR4가 T-cell ALL 발생을 예측하는 강력한 표지자가 될 수 있을 것으로 사료되었다. 결론:급성 림프구성 백혈병은 HLA와 연관된 질환이며, 급성 림프구성 백혈병의 발생 및 백혈병 세포의 분화 단계를 예측하는데 본 연구가 유용한 기준 자료가 될 것으로 생각되었다. Backgrounds:The MHC(Major Histocompatibility Complex) has been widely studied in the field of transplantation immunology, since initially defined as transplantation antigen in mouse in 1936, and it's a major genetic complex which regulates immune responses, associated with development of infectious diseases, cancers, or autoimmune diseases. Although associations have been demonstrated between many autoimmune diseases and HLA antigens or haplotypes in human, the studies of human leukemia or other hemopoietic disease and HLA association are rare and have too small sample sizes to get a significant result. We tried to investigate the association of ALL with HLA in 222 patients by using appropriate statistical methods, and invesgate HLA associations in FAB and immunological subgroup in ALL. Methods: The subject of this study was 222 patients with ALL who admitted in St. Mary's hospital from January 1991 to July 1998 and was typed for HLA Class I, II antigens by using serological method of NIH standard microlymphocytotoxicity. We calculated the HLA antigen, gene and 2-locus haplotype frequencies in each ALL subgroup including FAB classification and immunophenotypical subgroup, and calculated relative risk by Haldane's method by comparing HLA antigen frequencies in ALL group with those in normal control population. The chi-square method or Fisher's exact test was used to assess the significance of the differencies in the antigen and haplogtype distributions in the control vs. ALL population. Results: 1)The frequencies of Cw8 were decreased in ALL with relative risk 0.12 and high statistical significance with p-values less than 0.001 was found, suggesting strong Cw8 associations with ALL. This means Cw8 may be a gene which resists to development of ALL or may be linked to other recessive gene, or Cw8 may be a gene which encodes increased immune responses to exogenous antigens such as leukemia virus, or may be linked to other gene. Otherwise, Cw8 may be an antigen which has a key role in immune surveillance to development of ALL. 2) The frequencies of Cw3 were increased significantly in ALL and revealed p-values less than 0.001 in ALL, suggesting Cw3 could be a marker predicting development of ALL. 3) B and DR-blank gene frequencies were increased in ALL and this phenomenon was prominent in DR locus, showing 12.9% of DR-blank gene frequencies and 45.80 of relative risk in overall 630 patients who were typed for DR antigen. This suggests increased B and DR homozygosity or increased undetected antigens due to loss or modification of DR allele in ALL. 4) Several HLA antigens were detected associated with each ALL group and subgroup. Especially A11, B62, DR4 antigens were strongly associated with T-cell immunophenotypes, and DR4 had a 100% correlation with CD3, suggesting DR4 could be a strong marker predicting development of T-cell ALL. Conclusion: ALL is a disease associated with HLA and this study will be worth predicting development of ALL, and differentiation stages of leukemic cells in ALL.