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Fate of Astrocytes in The Gerbil Hippocampus After Transient Global Cerebral Ischemia
Kim, Hyeyoung,Park, Joon Ha,Shin, Myoung Cheol,Cho, Jun Hwi,Lee, Tae-Kyeong,Kim, Hyunjung,Song, Minah,Park, Cheol Woo,Park, Young Eun,Lee, Jae-Chul,Ryoo, Sungwoo,Kim, Young-Myeong,Kim, Dae Won,Hwang, MDPI 2019 INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES Vol.20 No.4
<P>Neuronal death and reactive gliosis are major features of brain tissue damage following transient global cerebral ischemia (tgCI). This study investigated long-term changes in neuronal death and astrogliosis in the gerbil hippocampus for 180 days after 5 min of tgCI. A massive loss of pyramidal neurons was found in the hippocampal CA1 area (CA1) area between 5 and 30 days after tgCI by Fluoro-Jade B (FJB, a marker for neuronal degeneration) histofluorescence staining, but pyramidal neurons in the CA2/3 area did not die. The reaction of astrocytes (astrogliosis) was examined by glial fibrillary acidic protein (GFAP) immunohistochemistry. Morphological change or degeneration (death) of the astrocytes was found in the CA1 area after tgCI, but, in the CA2/3 area, astrogliosis was hardly shown. GFAP immunoreactive astrocytes in the CA1 area was significantly increased in number with time and peaked at 30 days after tgCI, and they began to be degenerated or dead from 40 days after tgCI. The effect was examined by double immunofluorescence staining for FJB and GFAP. The number of FJB/GFAP<SUP>+</SUP> cells (degenerating astrocytes) was gradually increased with time after tgCI. At 180 days after tgCI, FJB/GFAP<SUP>+</SUP> cells were significantly decreased, but FJB<SUP>+</SUP> cells (dead astrocytes) were significantly increased. In brief, 5 min of tgCI induced a progressive degeneration of CA1 pyramidal neurons from 5 until 30 days with an increase of reactive astrocytes, and, thereafter, astrocytes were degenerated with time and dead at later times. This phenomenon might be shown due to the death of neurons.</P>
Clinical Evaluation of Human Papillomavirus DNA Genotyping Assay to Diagnose Women Cervical Cancer
Sunghyun Kim,Dongsup Lee,Yeun Kim,Geehyuk Kim,Sangjung Park,Yeonim Choi,Tae Ue Kim,Kwang Hwa Park,Hyeyoung Lee 대한의생명과학회 2012 Biomedical Science Letters Vol.18 No.2
In this study, we evaluated the human papillomavirus (HPV) genotyping test called MolecuTech REBA HPV-ID® (YD Diagnostics, Seoul, Korea) for 704 women who also had cervical cytological evaluations by Thin Prep. The infection rate of high-risk HPV genotypes was 56.6% in patients with normal cytology, 59.8% in those with benign, low-grade squamous intraepithelial lesions, 51.4% in those with atypical squamous cells of uncertain significance, 92.3% in those with high-grade squamous intraepithelial lesions, and 94.1% in those with squamous cell carcinoma or adenocarcinoma. HPV 16 was the most common genotype detected in any lesion, followed by HPV 53, 58, 33, 52, 45, 31, and 35, in order. The HPV DNA test with PCR-REBA is a very highly sensitive, but less specific, method. The infection rates and HPV genotype distribution of non-Korean people versus people from South Korea showed regional differences.
판상형 Glass-flake를 이용한 내캐비테이션 도료 개발 및 성능평가
박혜영 ( Hyeyoung Park ),김성길 ( Sung-gil Kim ),김상석 ( Sang-suk Kim ),최이찬 ( I-chan Choi ),김병우 ( Byungwoo Kim ),김승진 ( Seung-jin Kim ) 한국화학공학회 2016 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.54 No.2
In response to the cavitation caused by the partial vacuum caused by the fluid flow, a paint was developed by dispersing the lamella-shaped glass-flake in resin for anti-cavitation. This composite paint was developed by using the inorganic filler (lamella shaped glass-flake) and the NBR (Acrylonitrile-butadiene rubber) which was modified epoxy resin. Especially, the glass-flake was a thin film with a thickness of about 100~200 nm and length of about 20~30 μm, the aspect ratio was about 200 to 300 times that of the plate-shaped. So the paint for anti-cavitation have shown excellent performance in corrosion resistance. The results of evaluating anti-cavitation performance was below, tensile strength 4.8~6 N/mm2 or more, rupture elongation 30% or higher, abrasive speed 10 mm2/h or less. In particular, it showed more than twice the superior performance compared to existing advanced foreign products in anti-cavitation performance evaluation.
PE-133: Fate of Potential Living Donors for Liver Transplantation
( Taishi Fang ),( Ok-kyung Kim ),( Sanghee Song ),( Ok Soo Kim ),( Curi Ahn ),( Hyeyoung Kim ),( Suk Kyun Hong ),( Kyung Chul Yoon ),( Hyo-sin Kim ),( Hyeyoung Kim ),( Youngrok Choi ),( Hae Won Lee ) 대한간학회 2016 춘·추계 학술대회 (KASL) Vol.2016 No.1
Aims: In this study, we aimed to elucidate the fate of potential live liver donors. Methods: From July of 2011 to June of 2013, 372 potential donors were evaluated for 302 matched recipients. Data was prospectively collected. Results: Among 302 recipients, 209 patients received LDLT finally. Among 302 recipients, 53 recipients (17.5%) had more than 1 potential donor. 64.8% of donors was male and 53.5% was children of the recipients. Among 372 potential donors, 209 donors (56.2%) finally received donor hepatectomy for living donation. 159 cases (42.7%) were excluded for various reasons. Among 159 excluded cases, 87 cases were excluded due to donor reasons. The other 72 cases could not donate due to recipient reasons e.g. death, infection or Deceased donor LT. Donor reasons for exclusion consisted of withdrawal of consents (n=25, 28.7%), medical problems (n=24, 27.6%), small remnant volume (n=17, 19.5%), and others (n=21, 24.1%). The main reasons for donor exclusion were medical problem and withdrawal of consent. Therefore, thorough medical clearing and careful examination for donor voluntarism are important in donor evaluation process. Conclusions: The main reasons for donor exclusion were medical problem and withdrawal of consent. Therefore, thorough medical clearing and careful examination for donor voluntarism are important in donor evaluation process.
Hur, Yun-Gyoung,Kim, Ahreum,Kang, Young Ae,Kim, An Sik,Kim, Dae Yeon,Kim, Yeun,Kim, Youngmi,Lee, Hyeyoung,Cho, Sang-Nae American Society for Microbiology 2015 Journal of clinical microbiology Vol.53 No.3
<P>This study aimed to evaluate the serodiagnostic potential of immunoglobulin G (IgG) responses to <I>Mycobacterium tuberculosis</I> antigens in pulmonary tuberculosis (TB) patients, recent TB contacts with latent TB infection (LTBI), and healthy subjects. Infections were assessed using tuberculin skin tests, QuantiFERON-TB Gold In-Tube tests, drug susceptibility testing, and molecular genotyping of clinical isolates. Serum IgG responses to selective <I>M. tuberculosis</I> antigens, including the 38-kDa and 16-kDa antigens, lipoarabinomannan (LAM), and recombinant early secreted antigen target 6 kDa (ESAT-6) and culture filtrate protein 10 kDa (CFP-10), were determined. We found that the serum IgG responses to all antigens might differentiate between active TB and LTBI, with LAM having the highest diagnostic value (area under the curve [AUC] of 0.7756, <I>P</I> < 0.001). Recurrent TB cases showed significantly higher IgG responses to 38 kDa, CFP-10 (<I>P</I> < 0.01), and LAM (<I>P</I> < 0.05) than new cases, and male patients had higher levels of antigen-specific IgG than females (<I>P</I> < 0.05). Conversely, drug resistance and patient body mass index did not affect IgG responses (<I>P</I> > 0.05). LAM-specific IgG responses differentiated between acid-fast bacillus (AFB) smear-positive and -negative patients (<I>P</I> < 0.01), whereas antigen-specific IgG responses did not vary with the <I>M. tuberculosis</I> genotype (<I>P</I> > 0.05). Significantly higher IgG responses to 38 kDa and 16 kDa were observed in AFB smear-negative patients than in controls. These results suggest that assessment of serum IgG responses to selective purified <I>M. tuberculosis</I> antigens may help improve the diagnosis of active TB, particularly for sputum smear-negative patients or recurrent cases, and these may also help to differentiate between active TB and LTBI.</P>