Ji Hyun Yoo;Jong An Lee;Jae Young Choi;Sang Min Shin;Moon Cheol Shin;Hyeon Ah Kim;Yong Jun Kang;Hee Chung Ji;In Cheol Cho;Byoung Chul Yang
Korean Journal of Agricultural Science
/
v.49
no.4
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pp.963-971
/
2022
Production of high-quality horses is important to make the horse industry grow. Grazing during the growing period can be an important factor affecting the production of high-quality horses. The objective of this study was to determine the effects of grazing on growing horses by analyzing their blood components and intestinal microbiota. Twelve growing horses for evaluating blood components and ten growing horses for evaluating intestinal microbiota were raised for about seven months and separated by two treatments: grazing vs. stable. Complete blood count, blood chemistry, and creatine kinase levels were analyzed as blood components and a 16s rRNA gene sequence analysis was performed to analyze intestinal microbiota. Calcium ions tended to be lower in the group with grazing treatment. Alkaline phosphatase and creatine kinase tended to be higher in the group with grazing treatment. These results indicate that grazing can provide horses with more exercise than staying in stables. At the phylum level, Firmicutes/Bacteroidetes ratios in grazing and stable groups were 4.2 and 6.5, respectively. Because various studies have reported that a. high Firmicutes/Bacteroidetes ratio indicates obesity, the method of raising horses might affect their physical ability. At the species level, rates of Clostridium butyricum in grazing and stable groups were 3.2% and 13.1%, respectively. Some strains of C. butyricum can cause several diseases such as botulism. These results indicate that grazing can positively affect growing horses in terms of blood components and intestinal microbiota. Moreover, grazing can be helpful to make growing horses healthy through proper exercise.
Malignant rhabdoid tumor (MRT) is a highly aggressive pediatric malignancy with no effective therapy. Therefore, it is necessary to identify a target for the development of novel molecule-targeting therapeutic agents. In this study, we report the importance of the runt-related transcription factor 1 (RUNX1) and RUNX1-Baculoviral IAP (inhibitor of apoptosis) Repeat-Containing 5 (BIRC5/survivin) axis in the proliferation of MRT cells, as it can be used as an ideal target for anti-tumor strategies. The mechanism of this reaction can be explained by the interaction of RUNX1 with the RUNX1-binding DNA sequence located in the survivin promoter and its positive regulation. Specific knockdown of RUNX1 led to decreased expression of survivin, which subsequently suppressed the proliferation of MRT cells in vitro and in vivo. We also found that our novel RUNX inhibitor, Chb-M, which switches off RUNX1 using alkylating agent-conjugated pyrrole-imidazole polyamides designed to specifically bind to consensus RUNX-binding sequences (5'-TGTGGT-3'), inhibited survivin expression in vivo. Taken together, we identified a novel interaction between RUNX1 and survivin in MRT. Therefore the negative regulation of RUNX1 activity may be a novel strategy for MRT treatment.
Kim, Bong-Ku;Cho, Chang-Hwan;Kim, Ki-Joon;Lee, Dong-Jin;Yang, Seung-Gyun
KOREAN JOURNAL OF CROP SCIENCE
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v.31
no.2
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pp.162-166
/
1986
Experiments were carried out to find the varietal differences in histological structure and outer characteristics, and its relationships between each characters in the internodes of 15 barley varieties (5 covered barley, 5 naked barley and 5 malting barley). The length of 1st-3th internodes from the top was longer in malting barley varieties, covered barley varieties and naked barley varieties in the order, but of 4th-5th internodes was longer in naked barley varieties, covered barley varieties, and malting barley varieties in the order. The diameter of naked barley varieties internodes was much thicker that of malting barley varieties. The thickness of culm wall in 1st-3rd internodes was thicker naked barley varieties, covered barley varieties, and malting barley varieties in sequence and in 4th-5th inter-nodes was covered barley varieties, malting barley varieties, and naked barley varieties in the order. The number of large vascular bundles in covered barley varieties had more than that of naked barley varieties and malting barley varieties in 1st internodes. The size of large vascular bundles in covered barley varieties and naked barley varieties was larger than that of malting barley varieties. The size of large vascular bundles had significant positive correlation with thickness of culm wall and the diameter of internodes. The thickness of culm wall was negatively correlated with the length of internodes and culm, but positively correlated with the diameter of internodes.
Yu Zhang;Woocheol Kwon;Ho Yun Lee;Sung Min Ko;Sang-Ha Kim;Won-Yeon Lee;Suk Joong Yong;Soon-Hee Jung;Chun Sung Byun;JunHyeok Lee;Honglei Yang;Junhee Han;Jeanne B. Ackman
Korean Journal of Radiology
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v.22
no.5
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pp.829-839
/
2021
Objective: To compare the diagnostic performance of contrast-enhanced radial T1-weighted gradient-echo 3-tesla (3T) magnetic resonance imaging (MRI) and computed tomography (CT) for the detection of visceral pleural surface invasion (VPSI). Visceral pleural invasion by non-small-cell lung cancer (NSCLC) can be classified into two types: PL1 (without VPSI), invasion of the elastic layer of the visceral pleura without reaching the visceral pleural surface, and PL2 (with VPSI), full invasion of the visceral pleura. Materials and Methods: Thirty-three patients with pathologically confirmed VPSI by NSCLC were retrospectively reviewed. Multidetector CT and contrast-enhanced 3T MRI with a free-breathing radial three-dimensional fat-suppressed volumetric interpolated breath-hold examination (VIBE) pulse sequence were compared in terms of the length of contact, angle of mass margin, and arch distance-to-maximum tumor diameter ratio. Supplemental evaluation of the tumor-pleura interface (smooth versus irregular) could only be performed with MRI (not discernible on CT). Results: At the tumor-pleura interface, radial VIBE MRI revealed a smooth margin in 20 of 21 patients without VPSI and an irregular margin in 10 of 12 patients with VPSI, yielding an accuracy, sensitivity, specificity, positive predictive value, negative predictive value, and F-score for VPSI detection of 91%, 83%, 95%, 91%, 91%, and 87%, respectively. The McNemar test and receiver operating characteristics curve analysis revealed no significant differences between the diagnostic accuracies of CT and MRI for evaluating the contact length, angle of mass margin, or arch distance-to-maximum tumor diameter ratio as predictors of VPSI. Conclusion: The diagnostic performance of contrast-enhanced radial T1-weighted gradient-echo 3T MRI and CT were equal in terms of the contact length, angle of mass margin, and arch distance-to-maximum tumor diameter ratio. The advantage of MRI is its clear depiction of the tumor-pleura interface margin, facilitating VPSI detection.
Ji Young Choi;Jihye Yun;Subin Heo;Dong Wook Kim;Sang Hyun Choi;Jiyoung Yoon;Kyuwon Kim;Kee Wook Jung;Seung-Jae Myung
Korean Journal of Radiology
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v.24
no.11
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pp.1093-1101
/
2023
Objective: Cine magnetic resonance imaging (MRI) has emerged as a noninvasive method to quantitatively assess bowel motility. However, its accuracy in measuring various degrees of small bowel motility has not been extensively evaluated. We aimed to draw a quantitative small bowel motility score from cine MRI and evaluate its performance in a population with varying degrees of small bowel motility. Materials and Methods: A total of 174 participants (28.5 ± 7.6 years; 135 males) underwent a 22-second-long cine MRI sequence (2-dimensional balanced turbo-field echo; 0.5 seconds per image) approximately 5 minutes after being intravenously administered 10 mg of scopolamine-N-butyl bromide to deliberately create diverse degrees of small bowel motility. In a manually segmented area of the small bowel, motility was automatically quantified using a nonrigid registration and calculated as a quantitative motility score. The mean value (MV) of motility grades visually assessed by two radiologists was used as a reference standard. The quantitative motility score's correlation (Spearman's ρ) with the reference standard and performance (area under the receiver operating characteristics curve [AUROC], sensitivity, and specificity) for diagnosing adynamic small bowel (MV of 1) were evaluated. Results: For the MV of the quantitative motility scores at grades 1, 1.5, 2, 2.5, and 3, the mean ± standard deviation values were 0.019 ± 0.003, 0.027 ± 0.010, 0.033 ± 0.008, 0.032 ± 0.009, and 0.043 ± 0.013, respectively. There was a significant positive correlation between the quantitative motility score and the MV (ρ = 0.531, P < 0.001). The AUROC value for diagnosing a MV of 1 (i.e., adynamic small bowel) was 0.953 (95% confidence interval, 0.923-0.984). Moreover, the optimal cutoff for the quantitative motility score was 0.024, with a sensitivity of 100% (15/15) and specificity of 89.9% (143/159). Conclusion: The quantitative motility score calculated from a cine MRI enables diagnosis of an adynamic small bowel, and potentially discerns various degrees of bowel motility.
Na Yeon Yoon;Doo Hoe Ha;Sang Min Lee;Hye Jung Choi
Journal of the Korean Society of Radiology
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v.85
no.3
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pp.607-617
/
2024
Purpose Recent studies have demonstrated the usefulness of diffusion-weighted MR neurography (DW MRN) for assessing nerve roots. This study aimed to evaluate the utility of DW MRN with a unidirectional motion-probing gradient (MPG) for the lumbar nerve roots at 1.5T MR. Materials and Methods Sixty-four lumbar spine MRI scans with DW MRN using anteroposterior unidirectional MPG were retrospectively analyzed. Any changes in the 512 lumbar spinal nerve roots from L3 to S1 were evaluated using T2-weighted imaging (T2WI), contrast-enhanced T1-weighted imaging (CE T1WI), and DW MRN, with agreement and correlation analysis. Results T2WI revealed compression of 78 nerve roots, and CE T1WI revealed 52 instances of nerve root enhancement. Sixty-seven nerve roots showed swelling and hyperintensity on DW MRN. A total of 42 nerve roots showed changes in the CE T1WI and DW MRN sequences. Moderate to substantial agreement and moderate positive correlation were observed between DW MRN and CE T1WI, as well as DW MRN and T2WI (κ = 0.59-0.65, ρ = 0.600-0.653). Conclusion DW MRN with unidirectional anteroposterior MPG can help evaluate neuritisrelated changes in spinal nerve roots and could serve as a sequence capable of complementing or substituting gadolinium CE imaging.
The mechanism by which $V_H$ region gene segments is selected in B lymphocyte is not known. Moreover, evidence for both random and nonrandom expression of $V_H$ genes in matured B cells has been presented previously. In this report, the technique of in situ hybridization allowed us to analyze expressed $V_H$ gene families in normal B lymphocyte at the single cell level. The analysis of normal B cells in this study eliminated any posssible bias resulting from transformation protocols used previously and minimized limitation associated with sampling size. Therefore, an accurate measure of the functional and expressed $V_H$ gene repertoire in B lymphocyte could be made. One of the most important controls for the optimization of in situ hybridization is to establish probe concentration and washing stringency due to the degree of nucleotide sequence similarlity between different families which in some cases can be as high as 70%. When the radioactive $C{\mu}$ and $V_{H}J558$ RNA probes are tested on LPS-stimulated adult spleen cells, $2{\sim}4{\times}106cpm$/slide shows low background and reasonable frequency of specific positive cells. For the washing condition. 40~50% formamide at $54^{\circ}C$ is found to be optimum for the $C{\mu}$. $V_{H}S107$ and $V_{H}J558$ probes. The analyzed results clearly demonstrate that the level of each different $V_H$ gene family expression is dependent upon the complexity or size of that family. These findings are also extended to the level of $V_H$ gene family expression in separated bone marrow B cells depend upon the various stage of differentiation and conclude no preferential utilization of specific $V_H$ gene family. Thus, the utilization of VH gene segments in B lymphocyte of adult BALB/c mice is random and is not regulated or changed during the differentiation of B cells.
Rhee, Kang Won;Yun, Sin Weon;Lee, Dong Keun;Choi, Eung Sang;Yoo, Byeong Hoon;Lee, Mi Kyung
Clinical and Experimental Pediatrics
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v.48
no.6
/
pp.640-648
/
2005
Purpose : Kawasaki disease(KD) is known as an acute multi-systemic vasculitis with various immunologic abnormalities. Adhesion of leukocyte to endothelial cells is a key event in the sequence of inflammatory response. This study was performed to investigate the clinical significance of serum soluble intercellular adhesion molecule-1(sICAM-1) and soluble vascular cell adhesion molecule-1 (sVCAM-1) in acute and subacute stages of typical KD for diagnostic and prognostic value. Methods : A typical KD group was 32 patients who were hospitalized from Jan. 2002 to Jun. 2004 was enrolled. Control was 16 non-KD patients with febrile illness. sICAM-1 and sVCAM-1 were measured and compared by Echocardiographic and clinical findings and cardiac troponin T and I. Results : sICAM-1 and sVCAM-1 levels of acute KD were significantly elevated over control(P=0.019 vs. P=0.049, respectively) and sICAM-1 was significantly decreased in subacute stage(P=0.0015). sICAM-1 and sVCAM-1 had positive correlation with each other in both stages(P=0.0067, P=0.015, retrospectively). Neither sICAM-1 nor sVCAM-1 correctly reflected the coronary abnormalities and responsiveness to intravenous gammaglobulin(IVGG) in both stages. But sVCAM-1 was significantly increased in the carditis group in both stages(P=0.025, P=0.014, retrospectively) and had a positive correlation with troponin T(r=0.63, P=0.00063). Conclusion : The levels of sICAM-1 and sVCAM-1 were not very useful tools for detecting and predicting subsequent coronary abnormalities and responsiveness to IVGG in KD patients. However, sVCAM-1 appears to play a significant role in carditis of KD. Further studies are needed about various adhesion molecules and cytokines in the pathogenesis of KD.
Purpose: This study was to investigate whether the application of different diagnostic criteria affected the frequency of convergence insufficiency (CI). Methods: Eighty one subjects with mean age of 22.54 years (20 to 27 years) were evaluated. Binocularity tests after refraction were performed as the following tests: near point of convergence (NPC) with an accommodative target, phoria using von Graefe method, positive fusional vergence (PFV) with a phoropter. Subjects with CI were diagnosed when exophoria (exo) was greater at near than at distance ($exo{\geq}4{\Delta}$, or >$6{\Delta}$), fusional vergence was $PFV{\leq}11{\Delta}$ for blur, $PFV{\leq}15{\Delta}$ for break, Sheard's or Percival's criterion, and NPC was $NPC{\geq}6cm$, ${\geq}7.5cm$ or >10 cm. Results: Frequency of CI with one diagnostic criterion was ranged from 6.2% to 77.8%, and was overestimated or underestimated according to criteria. It was reduced to the range of 6.2% to 43.2% with diagnostic criteria more than two, especially to the range of 24.7% to 28.4% with lower variability in diagnostic criteria including phoria and Sheard's criterion. There were high relationship between total score of signs and phoria score (r = 0.772, p<0.001), and measured phoria and Sheard's criterion (r = -0.654, p<0.001), but NPC had a high variability and a weak or no significant relationship with other diagnostic criteria. Results suggested $exo{\geq}4{\Delta}$, Sheard's criterion and $NPC{\geq}7.5cm$ for diagnostic criteria of signs and sequence for CI. Conclusions: Frequency of CI is likely to be over- and underestimated with diagnostic criteria. Cutoff values and procedures for phoria, Sheard's criterion and NPC as clinical signs should be suggested definitely in diagnosis associated with CI.
Park, Sung-Hee;Choi, Ok-Kyung;Jeong, Jin-A;Kim, Woon-Ho;Lee, Yea-Eun;Park, Kwang-Hee;Yoon, Mi-Hye
Korean Journal of Microbiology
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v.52
no.3
/
pp.286-297
/
2016
Clostridium perfringens is both a ubiquitous environmental bacterium and a major cause of human gastrointestinal disease, and C. perfringens food poisoning ranks among the most common gastrointestinal diseases in developed countries. 120 isolates of C. perfringens were obtained from food-poisoning outbreaks in 2013~2014, Gyeonggi-do. Using PCR, all 120 isolates were identified as C. perfringens type A. Of the tested isolates, 49 isolates carried the cpe gene, 71 isolates carried the cpb2 gene. The outbreak cases of cpb2 and cpe /cpb2 genes were 7 and 7, whereas the outbreak cases of cpe-gene were 2. The epidemiological relationship between C. perfringens isolates has previously been investigated chiefly by pulsed-field gel electrophoresis (PFGE) and multi-locus sequence typing (MLST). The genetics relatedness of the isolates raged from 53.5-100% and 75 district PFGE type were observed. The PFGE results revealed a wide genetic diversity among the 64 cpb2 carrying isolates (except 7 isolates), while 46 cpe-carrying isolates (except 3 isolates) showed a high genetic similarity. The MLST analysis revealed that 14 cpe isolates (cpe-chromosomal isolates) belong to a distinct cluster that is significantly distant from all the other cpb2 isolates (cpe-plasmid carrying and cpe-negative isolates). The isolates carrying a cpb2 appear to be rarely related, and are more variable than chromosomal cpe isolates. The results suggest that the cpe-positive outbreak isolates showed close genetic relation, whereas the cpb2-positive isolates revealed a wide genetic diversity.
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