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Park Se Jin,Kang Daeun,Lee Minhyeok,Lee Su Yel,Park Young Gyu,Oh TaeJeong,Jang Seunghyun,Hwang Wan Jin,Kwon Sun Jung,An Sungwhan,Son Ji Woong,Jeong In Beom 대한의학회 2024 Journal of Korean medical science Vol.39 No.2
Background: When suspicious lesions are observed on computer-tomography (CT), invasive tests are needed to confirm lung cancer. Compared with other procedures, bronchoscopy has fewer complications. However, the sensitivity of peripheral lesion through bronchoscopy including washing cytology is low. A new test with higher sensitivity through bronchoscopy is needed. In our previous study, DNA methylation of PCDHGA12 in bronchial washing cytology has a diagnostic value for lung cancer. In this study, combination of PCDHGA12 and CDO1 methylation obtained through bronchial washing cytology was evaluated as a diagnostic tool for lung cancer. Methods: A total of 187 patients who had suspicious lesions in CT were enrolled. PCDHGA12 methylation test, CDO1 methylation test, and cytological examination were performed using 3-plex LTE-qMSP test. Results: Sixty-two patients were diagnosed with benign diseases and 125 patients were diagnosed with lung cancer. The sensitivity of PCDHGA12 was 74.4% and the specificity of PCDHGA12 was 91.9% respectively. CDO1 methylation test had a sensitivity of 57.6% and a specificity of 96.8%. The combination of both PCDHGA12 methylation test and CDO1 methylation test showed a sensitivity of 77.6% and a specificity of 90.3%. The sensitivity of lung cancer diagnosis was increased by combining both PCDHGA12 and CDO1 methylation tests. Conclusion: Checking DNA methylation of both PCDHGA12 and CDO1 genes using bronchial washing fluid can reduce the invasive procedure to diagnose lung cancer.
Kim, Beom Joon,Lee, Hyo-Sang,Lee, Joong Seok,Cho, Sanghyeok,Kim, Hyunjung,Son, Hae Jung,Kim, Honggon,Ko, Min Jae,Park, Sungnam,Kang, Moon Sung,Oh, Se Young,Kim, BongSoo,Cho, Jeong Ho American Chemical Society 2013 JOURNAL OF PHYSICAL CHEMISTRY C - Vol.117 No.22
<P>We characterized the electrical properties of ambipolar polymer field-effect transistors (PFETs) based on the low-band-gap polymer, pNAPDO-DPP-EH. The polymer consisted of electron-rich 2,6-di(thienyl)naphthalene units with decyloxy chains (NAPDO) and electron-deficient diketopyrrolopyrrole units with 2-ethylhexyl chains (DPP-EH). The as-spun pNAPDO-DPP-EH PFET device exhibited ambipolar transport properties with a hole mobility of 3.64 × 10<SUP>–3</SUP> cm<SUP>2</SUP>/(V s) and an electron mobility of 0.37 × 10<SUP>–3</SUP> cm<SUP>2</SUP>/(V s). Thermal annealing of the polymer film resulted in a dramatic increase in the carrier mobility. Annealing at 200 °C yielded hole and electron mobilities of 0.078 and 0.002 cm<SUP>2</SUP>/(V s), respectively. The mechanism by which the mobility had improved was investigated via grazing incidence X-ray diffraction studies, atomic force microscopy, and temperature-dependent transport measurements. These results indicated that thermal annealing improved the polymer film crystallinity and promoted the formation of a longer-range lamellar structure that lowered the thermal activation energy for charge hopping. Thermal annealing, moreover, reduced charge trapping in the films and thus improved the electrical stability of the PFET device. This work underscores the fact that long-range ordering in a crystalline polymer is of great importance for efficient charge transport and high electrical stability.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jpccck/2013/jpccck.2013.117.issue-22/jp400664r/production/images/medium/jp-2013-00664r_0010.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/jp400664r'>ACS Electronic Supporting Info</A></P>
Jaeeun Yoo,Beom Se Son,Eunhee Han,Gyong Gi Yu,이승옥 대한임상검사정도관리협회 2020 Journal of Laboratory Medicine And Quality Assuran Vol.42 No.3
Background: The quantification of the hepatitis B virus (HBV) or hepatitis C virus (HCV) is critical for the diagnosis and prognostic follow-up of the viral infection. The Alinity m assay is a recently developed, fully automated “random-access” system for quantitative molecular assays. The aim of this study was to verify the validity of the Alinity m assay by comparing its performance in HBV and HCV quantifications with the established Abbott m2000 HBV and HCV assays. Methods: The precision, linearity, limit of detection (LOD), correlation with the Abbott m2000 assay, and interference were evaluated. Results: The within-laboratory standard deviation ranged from 0.106 to 0.137 log IU/mL for HBV and from 0.073 to 0.097 log IU/mL for HCV, which was lower than the manufacturer’s specification of 0.25 log IU/mL, indicating good precision. Linearity was observed from 1.14 to 8.14 log IU/mL for the HBV assay and from 1.09 to 7.09 log IU/mL for the HCV assay. The LODs of HBV and HCV were 10 and 6.39 IU/mL, respectively, which were equivalent to or better than those claimed by the manufacturer. For comparative evaluation between Alinity m and m2000 assays, 142 HBV and 70 HCV samples were tested. The correlation test revealed a strong correlation for both markers, and the Passing–Bablok regression analysis did not reveal any significant deviation. Conclusions: The Alinity m assay demonstrated excellent performance for HBV and HCV quantifications with reduced hands-on time and a randomaccess format.
( Daeun Kang ),( In Beom Jung ),( Su Yel Lee ),( Se Jin Park ),( Wan Jin Hwang ),( Minhyeok Lee ),( Sun Jung Kwon ),( Dong Ho Park ),( Ji Woong Son ) 대한결핵 및 호흡기학회 2020 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.128 No.-
Particulate matter (PM) has various systemic effects, such as respiratory, cardiovascular, endocrine, as well as having effects on the nervous systems. So far, there have been many epidemiologic studies, but studies related to the biological mechanisms are insufficient. We researched the effects of PM on lung epithelial cells with Next Generation Sequencing (NGS) and validated this with quantitative real-time polymerase chain reaction (qRT-PCR). We cultured the group treated with PM10 at a concentration of 50μg/mL and the untreated group for seven days in five lung cell lines: NCI-H358, HCC-827, A549, NCI-H292, BEAS-2B. Then, we extracted the RNA from the sample and performed NGS. As a result of NGS, various gene expressions were upregulated or downregulated. Among them, we selected the gene whose mean fold change was more than doubled and changed in the same direction in all five cell lines. Based on these genes, we selected the top 10 genes, either upregulated or downregulated, to validate with the qRT-PCR. There were the four genes that matched the NGS and qRT-PCR Results, all of which were upregulated genes(Table 1). The four genes are CYP1A1, CYP1B1, LINC01816, and BPIFA2. All four genes that matched the two Results were up-regulated genes and none of the down-regulated genes matched. CYP1A1 and CYP1B1 are known to cause lung cancer by metabolizing polycyclic aromatic hydrocarbons, and long non-coding RNA is also known to play an important role in lung cancer. Considering this, we thought that PM10 might be associated with lung cancer by activating CYP1A1, CYP1B1, and LINC01816.
( Minhyeok Lee ),( Ji Woong Son ),( Chang Ryul Park ),( Daeun Kang ),( Su Yel Lee ),( Se Jin Park ),( Wan Jin Hwang ),( Gwan Woo Ku ),( Seong Lan Yu ),( In Beom Jeong ),( Sun Jung Kwon ),( Jaeku Kang 대한결핵 및 호흡기학회 2021 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.129 No.-
Purpose Cancer stem cells (CSCs) identified in lung cancer exhibit resistance to chemotherapy, radiotherapy, and targeted therapy. Therefore, a technology to control of CSCs is needed to overcome such resistance to cancer therapy. Various evidences about the association between epithelial-mesenchymal transition related transcriptomic alteration and acquisition of CSC phenotype have been proposed recently. In our previous research, down-regulated miR-26a-5p is closely related to mesenchymal-like lung cancer cell lines. These findings suggest that miR-26a-5p might be involved in lung cancer stemness. Methods RNA polymerase III subunit G (POLR3G) was selected as a candidate target of miR-26a-5p related to cancer stemness. its quantitative relationship was investigated by polymerase chain reaction, western blot after transfection of miR-26a-5p. luciferase assay were done for investigating the direct regulation of miR-26a-5p on POLR3G expression. After transfection of miR-26a-5p, colony formation assay and sphere formation assay were performed to evaluate the effect on cancer stemness. By treating cancer cell by miR-26a-5p and paclitaxel, cell viability was checked by 3-(4,5-dimethylthiazol-2-yl)-5-(3- carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium (MTS) assay and Muse cell analyzer. Expression level of each gene and its impact on survival were revealed by the cancer genome atlas pancancer database. Results miR-26a-5p regulated the expression of POLR3G directly. Overexpression of miR-26a-5p induced down regulation of POLR3G and a marked reduction of colony formation and sphere formation. Co-treatment of miR-26a-5p with paclitaxel decreased cell growth, suggesting that miR-26a-5p might play a role as a chemotherapy sensitizer. In the cancer genome atlas data, downregulated miR-26a-5p and up-regulated POLR3G were shown compared to adjacent normal tissue. High miR-26a-5p and low POLR3G expression were also related to higher survival rate of patients with lung adenocarcinoma. Conclusions Overexpression of miR-26a-5p can suppress lung cancer stemness and make cancer cell become sensitive to chemotherapy. This finding provides a novel insight into a potential lung cancer treatment by regulating stemness.