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Woo‑Ri Shin,Mun‑Jong Lee,SEKHONSIMRANJEET SINGH,Ji Hun Kim,Sun Chang Kim,Byung‑Kwan Cho,Ji‑Young Ahn,Yang‑Hoon Kim 대한독성 유전단백체 학회 2020 Molecular & cellular toxicology Vol.16 No.3
Background Development of genetically modified crops has rapidly increased in last few years. The most widely grown GM crops express genes that confer herbicide tolerance and insect resistance. Detection system of GM crops is important for safety evaluation before its consumption. Objective The purpose of this research is to detect GM crops, especially PAT, in food-samples. Results The bar gene (PAT protein, herbicide resistant) was cloned in pGEX-4T-1 and expressed by E. coli. The high-affinity PAT-specific single-stranded DNA (ssDNA) aptamers were obtained from a random DNA library. MOE docking study was performed to identify the potential binding region of the selected aptamers on PAT. Aptamer-linked immobilized sorbent assay (ALISA) method was used to detect PAT. Conclusion We screened aptamer against PAT for developing an efficient detection method. The selected PAT specific aptamers, HRPA-05 and HRPA-07, showed the distinct target binding behaviors, and detected PAT protein by aptamer-linked immobilized sorbent assay method with high efficiency and selectivity.
신에스더,박희서,이시예,송우리,김명철,김덕환,송근호 충남대학교 수의과대학 동물의과학연구소 2004 動物醫科學硏究誌 Vol.12 No.-
A 3-month-old, 3.85kg female Jin-do dog with chief complaint of bloody diarrhea and depression was referred to the Veterinary Teaching Hospital, Chungnam National University. In fecal examination, trophozoites of giardia were observed and It was diagnosed as canine giardiasis. For treatment, metronidazole was administered orally for 5 days at a dose of 22mg/kg q12h. Diarrhea was not observed on 3 days after medication and most of clinical signs were disappeared on 7 days after medication with metronidazole. General conditions and activitivities became good on 13 days after medication. In addition, cysts or trophozoites of giardia were not detected any more in fecal examination using floating method with zinc sulphate solution. The present patient was a case of canine giardiasis that showed favorable response to metronidazole.
송우리,이시예,신에스더,박희서,정성목,송근호,김명철 충남대학교 수의과대학 동물의과학연구소 2004 動物醫科學硏究誌 Vol.12 No.-
A 4 years old, mixed male dog with a history of traffic accident was presented to the Veterinary Medical Teaching Hospital of Chungnam National University with tachypnea and respiratory distress. Physical examination showed that the dog was auscultated crackles sounds, dysynchronous abdominal breathing pattern, hemoptysis, hematuria, urodynia and right and left scleral congestion. Blood and blood chemical examination revealed that WBC, AST and ALT was highly elevated. Parenchymal pulmonary fluid and closed pneumothorax were observed by thoracic radiography. This case was diagnosed as pulmonary contusion. Intravenous fluid and oxygen was administered and also dexamethasone(1mg/kg, Ⅳ), furosemide(2mg/kg, Ⅳ), (ampicillin, 20mg/kg, Ⅳ) and meloxicam(0.2mg/kg, PO) were intravenously injected for 5 days. Abnormal clinical signs were disappeared after treatment.
Aptamer-Based Paper Strip Sensor for Detecting <i>Vibrio fischeri</i>
Shin, Woo-Ri,Sekhon, Simranjeet Singh,Rhee, Sung-Keun,Ko, Jung Ho,Ahn, Ji-Young,Min, Jiho,Kim, Yang-Hoon American Chemical Society 2018 ACS Combinatorial Science Vol.20 No.5
<P>Aptamer-based paper strip sensor for detecting <I>Vibrio fischeri</I> was developed. Our method was based on the aptamer sandwich assay between whole live cells, <I>V. fischeri</I> and DNA aptamer probes. Following 9 rounds of Cell-SELEX and one of the negative-SELEX, <I>V. fischeri</I> Cell Aptamer (VFCA)-02 and -03 were isolated, with the former showing approximately 10-fold greater avidity (in the subnanomolar range) for the target cells when arrayed on a surface. The colorimetric response of a paper sensor based on VFCA-02 was linear in the range of 4 × 10<SUP>1</SUP> to 4 × 10<SUP>5</SUP> CFU/mL of target cell by using scanning reader. The linear regression correlation coefficient (<I>R</I><SUP>2</SUP>) was 0.9809. This system shows promise for use in aptamer-conjugated gold nanoparticle probes in paper strip format for in-field detection of marine bioindicating bacteria.</P> [FIG OMISSION]</BR>
Development of Dual-functional Aptamer Complex that Inhibit the Pancreatic Cancer Growth
Woo-Ri SHIN,Hee-Young CHO,Ji-Young AHN,Yang-Hoon KIM 한국생물공학회 2021 한국생물공학회 학술대회 Vol.2021 No.10
Pancreatic cancer is hard to diagnose early and are not easily treated once they spread to other organs. The aptamer that have been treated with pancreatic cancer, will be targeted ALPPL2 expressed on the surface of pancreatic cancer cell and downregulated the CTHRC1 function by blocking the Smad. We selected the aptamer against CTHRC1/ALPPL2 protein. Then, we analyzed the binding structure of the protein-aptamer complex, which is confirmed the RNA aptamer bind to the active site of the protein. Aptamers of each binding to CTHRC1/ALPPL2 were conjugated to produce an aptamer complex with two functions that specifically bind to surface and inhibit the growth of pancreatic cancer cell.
Aptamer-Based Pathogen Monitoring for <i>Salmonella enterica</i> ser. Typhimurium
Shin, Woo-Ri,Sekhon, Simranjeet Singh,Kim, Seo-Gyeong,Rhee, Seung Jae,Yang, Gee Na,Won, Kyungho,Rhee, Sung-Keun,Ryu, Hojin,Kim, Kyunghwan,Min, Jiho,Ahn, Ji-Young,Kim, Yang-Hoon American Scientific Publishers 2018 Journal of biomedical nanotechnology Vol.14 No.11