Park, So Young;Park, Yong Bum;Choi, Jeong Hee;Lee, Jae Young;Kim, Jae-Seok;Mo, Eun Kyung
Tuberculosis and Respiratory Diseases
/
v.66
no.1
/
pp.13-19
/
2009
Background: The interferon-gamma assay is reported to have high sensitivity and specificity for making the diagnosis of latent tuberculosis infection. The clinical usefulness of this essay for detecting active tuberculosis has not fully defined. We evaluated the diagnostic value of the commercial interferon-gamma assay kit (QuantiFERONTB GOLD) for patients with suspected tuberculosis. Methods: From January to August 2007, we recruited 52 patients with suspected tuberculosis infection. We performed chest X-ray, sputum smear, culture, PCR and the QuantiFERON-TB GOLD test. Pleural fluid analysis and pleural biopsy were also done for the patients with pleural effusion. Results: Of the 52 patients we studied, 30 patients had a positive QuantiFERON-TB GOLD test result. 35 patients were finally diagnosed with active tuberculosis: twenty-five with a positive QuantiFERON-TB GOLD test and 10 with a negative QuantiFERON-TB GOLD test. The sensitivity of the QuantiFERON-TB GOLD test was 71.4% and the specificity was 64.7%. The positive predictive value was 0.83 and the negative predictive value was 0.50. There was no significant difference of any of the clinical and laboratory characteristics between the two groups of patients except the C-reactive protein (CRP) level. The CRP level was 29.2${\pm}$27.3 mg/dL in the pulmonary tuberculosis patients with a positive QuantiFERON-TB GOLD test and 72.9${\pm}$67.9 mg/dL in the patients with a negative QuantiFERON-TB GOLD test (p<0.05). Conclusion: The sensitivity and specificity of the QuantiFERON-TB GOLD test were inadequate for making the diagnosis of active tuberculosis. We suggest that the QuantiFERON-TB GOLD test should not be used by itself to exclude the diagnosis of active tuberculosis. The relationship of the QuantiFERON-TB GOLD test and the CRP level in patients with TB would be further investigated.
Background : Accumulating evidence shows that interleukin(IL)-1 plays a critical role in inflammation and connective tissue destruction observed in both osteoarthritis and rheumatoid arthritis. IL-1 induces gene expression related to cytokines, chemokines and matrix metalloproteinases by activation of many different transcription factors. Materials and Methods : The chondrosarcoma cell line, SW1353, is known to be a valuable in vitro system for investigating catabolic gene regulation by IL-$1{\beta}$ in chondrocytic cells. To explore and analyze the changes in gene expression by IL-1 responsible for arthritis, SW1353 was treated with IL-1 for 1, 6 and 24 h and then total RNAs were purified for each time. The changes in gene expression were analyzed with 17k human cDNA microarrays and validated by semi-quantitative RT-PCR. Results : Greater than a two-fold change was observed in 1,200 genes including metallothioneins, matrix metalloproteinases, extracellular matrix proteins, antioxidant proteins, cytoskeleton proteins, cell cycle regulatory proteins, proteins for cell growth and apoptosis, signaling proteins and transcription factors. These changes appeared to be correlate with the pathophysiological changes observed in early osteoarthritis. Conclusion : cDNA microarray analysis revealed a marked variability in gene expression, and provided insight into the overall molecular changes. The result of this study provide initial information for further studies to identify therapeutic targets in osteoarthritis pathogenesis.
Background: Preoperative 5-fluorouracil (5-FU)-based chemoradiotherapy is a standard treatment for locally advanced colorectal cancer (CRC). However, CRC cells often develop chemoradiation resistance (CRR). Recent studies have shown that long non-coding RNA (lncRNA) plays critical roles in a myriad of biological processes and human diseases, as well as chemotherapy resistance. Since the roles of lncRNAs in 5-FU-based CRR in human CRC cells remain unknown, they were investigated in this study. Materials and Methods: A 5-FU-based concurrent CRR cell model was established using human CRC cell line HCT116. Microarray expression profiling of lncRNAs and mRNAs was undertaken in parental HCT116 and 5-FU-based CRR cell lines. Results: In total, 2,662 differentially expressed lncRNAs and 2,398 mRNAs were identified in 5-FU-based CRR HCT116 cells when compared with those in parental HCT116. Moreover, 6 lncRNAs and 6 mRNAs found to be differentially expressed were validated by quantitative real time PCR (qRT-PCR). Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis for the differentially expressed mRNAs indicated involvement of many, such as Jak-STAT, PI3K-Akt and NF-kappa B signaling pathways. To better understand the molecular basis of 5-FU-based CRR in CRC cells, correlated expression networks were constructed based on 8 intergenic lncRNAs and their nearby coding genes. Conclusions: Changes in lncRNA expression are involved in 5-FU-based CRR in CRC cells. These findings may provide novel insight for the prognosis and prediction of response to therapy in CRC patients.
Kim, Dae Hyun;Kim, In-Soo;Lee, Gunsup;Cho, In-Sook;Cho, Kang Hee;Shin, Il Sheob;Kim, Se Hee;Chun, Jae An;Choi, In-Myung
Journal of Plant Biotechnology
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v.42
no.1
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pp.43-48
/
2015
It is a serious situation that the farmers' income has gradually decreased due to the decline of productivity of fruit trees infected with viroids. It has been known that Persimmon viroid (PVd) and Citrus viroid (CVd) are economically important viroids that can infected persimmon. In this study, the incidence of CVd and PVd in 'Fuyu' persimmon were identified as 41% and 34% in JeollaNam-do, respectively. The collected persimmon samples infected by both PVd and CVd were used for testing efficiency of the viroid inactivation methods. The samples were subjected to single treatment of the heat treatment ($37^{\circ}C$), cold treatment ($4^{\circ}C$), or antiviral agent treatment (Ribavirin), and double treatment of combinations of the three methods. Viroid inactivation efficiency was confirmed through RT-PCR. In the case of the samples subjected to cold treatment for 4 weeks, the viroid inactivation efficiency was most significantly high as 67% against the survival rate of 100%. In addition, in the case of the samples treated for 2 weeks with the antiviral agents and cold treatment, the viroid inactivation rate was similar to that of the cold treatment. In conclusion, the cold treatment showed the highest viroid inactivation efficiency, and this result will provide valuable information for production of viroid-free persimmon.
Im, Ik-Jae;Lee, Mee Jeong;Chung, Eun Hee;Yu, Jeesuk;Chang, Young Pyo;Park, Woo Sung;Park, Kwisung;Song, Nak Soo;Baek, Kyung Ah;Cha, Yune Tae
Pediatric Infection and Vaccine
/
v.13
no.2
/
pp.147-155
/
2006
Purpose : The purpose of this study is to evaluate epidemiological data of pathogens obtained from stool exams and compare them with the clinical course in pediatric patients with symptoms of acute gastroenteritis. Methods : Subjects were selected from patients presenting with symptoms of acute gastroenteritis who visited the outpatient clinic or who were admitted to the Dankook University Hospital from December of 2004 to December of 2005. Stool exams for 17 pathogens was performed. RT-PCR was used to detect norovirus and enzyme-linked immunoabsorbant assay (ELISA) was used to detect rotavirus, adenovirus and astrovirus in the subjects stool samples. Ten different species of bacteria(Salmonella spp., Shigella spp., Clostridium perfrigens, Campylobacter spp., Escherichia coli, Vibrio spp., Staphylococcus aureus, Bacillus cereus, Yersinia spp., and L. monocytogenes) were each selectively cultivated and enzyme immunoassays(EIA) was used to test for antigens for C. parvum, E. histolytica and G. lamblia. Retrospective chart review was performed for comparisons of clinical manifestations. Results : A total of 215 subjects was selected and of these 89 cases(41.4%) showed positive results for at least one pathogen. Male to female ratio was 1.3:1. Age distribution showed 4 cases less than one month(4.5%), 4 cases from 1~2 months(4.5%), 24 cases from 3~12 months(26.7%), 47 cases form 13~48 months(52.8%), 10 cases greater than 48 months (21.2%). Viruses showed the greatest proportion of cases with 68 subjects(77.5%), of these rotavirus being the most commonly reported in 50 cases. Bacteria was identified in 26 cases (29.2%), of these nontyphoidal salmonella was noted in 10 cases. Protozoa followed with 21 cases(23.6%), of these C. parvum was noted in 11 cases and G. lamblia was noted in 10 cases. Mixed infections with more than two pathogens were seen in 22 cases(24.7%), of these viral infection with accompanying parasitic infection was seen in 12(54.5%) cases. Conclusion : In this study we examined various pathogens known to cause acute gastroenteritis in children. Further studies for various pathogens can provide useful information for management of the acute gastroenteritis.
Ha Chang-Woo;Joo Hee-Jung;Park Ji-Kyoung;Chung Woo-Yeong
Childhood Kidney Diseases
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v.8
no.1
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pp.10-17
/
2004
Purpose : $Henoch-Sch\"{o}nlein$ purpura(HSP) nephritis has a variable range of prevalence from 25 to 50% among HSP patients and is a common cause of chronic glomerulonephritis in children. In our study, we evaluated the distribution and the association of the angioten-sinogen(AGT) M235T polymorphism with the clinical manifestations, particularly proteinuria in children with HSP with or without nephritis. Methods : The AGT M235T polymorphism was determined in children with HSP nephritis (n=33) or HSP without nephritis(n=28) who had been diagnosed at Busan Paik hospital from January 1996 to June 2001. The M235T polymorphism of the AGT gene was determined by PCR amplification of the genomic DNA. Results : The M235T polymorphism of AGT gene frequency was MM 75%, MT : 25%, TT : 0% in HSP and MM : 64%, MT : 36%, TT : 0% in HSP nephritis, there was no significant differences in the genotype and allele frequencies between the two groups. No significant differences in clinical manifestations at onset and last follow-up were seen between the two genotypes. When statistical analysis was done according to the presence of the M allele, the amount of 24-hour urinary protein excretion and the incidence of moderate to heavy proteinuria(>500 $mg/m^2/day$) at onset and at last follow-up were higher in the MT genotype than in those of in the MM genotype but these difference were not statistically significant. Conclusion : We suggest a lack of association between M235T polymorphism of the AGT gene and clinical manifestations in children with HSP nephritis. However, further follow-up studies based on sufficient number of patients and long term follow up periods are necessary to confirm the role of M235T polymorphism of AGT gene in children with HSP nephritis.
Pemetrexed has demonstrated clinical activity in non-small cell lung cancer (NSCLC) as well as other solid tumors. It transports into the cells via reduced folate carrier (RFC) and is polyglutamated by folypolyglutamate synthetase (FPGS). Pemetrexed directly inhibits several folate-dependent enzymes such as thymidylate synthase (TS), dihydrofolate reductase (DHFR), and glycinamide ribonucleotide formyltransferase (GARFT). We investigated the effects of genetic variations and the expression of RFC, FPGS, TS and DHFR enzymes on drug sensitivity to pemetrexed in NSCLC cells. Polymorphisms in RFC, FPGS, and DHFR were genotyped in four NSCLC cells - A549, PC14, HCC-1588, and H226. Real-time RT-PCR and Western blot was performed to evaluate mRNA transcripts and protein of these genes. The cytotoxicity of pemetrexed was measured by SRB assay. In PC14 and H226 cells, increased mRNA expressions of RFC and FPGS were associated with higher cytotoxicity to pemetrexed. 2R/2R genotype of TS and its increased mRNA expression were associated with drug resistance to pemetrexed in A549 cells, whereas 3R/3R genotype in TS with decreased mRNA expression was associated with higher sensitivity in H226 cells. After pemetrexed treatment, an inverse change of DHFR mRNA and protein expression was found. The strongest linkage disequilibrium (LD) was discovered between-1726C>T and -1188A>C SNP of DHFR gene. Our findings suggest the cytotoxic effect of pemetrexed may be associated with genetic polymorphisms and the expression level of genes involved in pemetrexed metabolisms in NSCLC cells.
Keum, Bo Ram;Hyeon, Jin Yi;Choe, So Hui;Jin, Ji Young;Jeong, Ji Woo;Lim, Jong Min;Park, Dong Chan;Cho, Kwang Keun;Choi, Eun Young;Choi, In Soon
Journal of Life Science
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v.27
no.11
/
pp.1256-1261
/
2017
${\beta}$-glucan is a constituent of the cell wall of fungi, yeast and plants. It plays an important role in the immune system such as activation of immunocyte, release of pro-inflammatory and anti-cancer effect. The immune system maintains a healthy immune homeostasis. However, when pathogenic substances enter the body, immune homeostasis can break down and disease can be triggered. Therefore, we studied a substance that regulates immune homeostasis. The purpose of the study we demonstrated whether the ${\beta}$-glucan can be applied to the immune-modulation effects in human monocytic THP-1 cells. ${\beta}$-glucan was incubated in THP-1 cells at various concentrations. The $TNF-{\alpha}$ mRNA expression and protein levels were analyzed by ELISA and Real-time PCR. Additionally, the expression of MAPKs (p38 and JNK), $I{\kappa}B-{\alpha}$ and $NF-{\kappa}B$ p50 were analyzed by western blot. ${\beta}$-glucan enhanced the production of $TNF-{\alpha}$ mRNA expression and protein levels in human monocytic THP-1 cells. In addition, activation of MAPKs (p38 and JNK) and $NF-{\kappa}B$ p50 induced by ${\beta}$-glucan were increased. The study suggests that ${\beta}$-glucan contributes to immune-stimulation effect by production $TNF-{\alpha}$ in human monocytic THP-1 cells, and that MAPKs and $NF-{\kappa}B$ p50 are involved in the process. Synthetically, we have suggested ${\beta}$-glucan may be improved to immune system effect in human monocytic THP-1 cells.
As one of the mucous components of Cheonggukjang, traditional fermented soybean paste, $\gamma$-PGA is a natural substance with diverse functions. In this paper, an in-vivo experiment has been performed using NC/Nga mice in order to find out the efficacy of $\gamma$-PGA in human atopic dermatitis. The NC/Nga mice with BMAC-induced atopic dermatitis were administered $\gamma$-PGA (PGA-HM) with 300 kDa and low-molecular $\gamma$-PGA (PGA-LM), respectively. As a result, a significant decrease in clinical skin severity score was detected in the group that was administered PGA-LM. In terms of serum IgE levels, a significant decline was observed in PGA-LM, compared to the control group. The serum IgG1 levels also decreased more in PGA-LM than in the control group. However, no significant difference was observed in both groups. To witness the induction of $CD4^+CD25^+foxp3^+$ Treg cells, mRNA was sampled from the back of PGA-HM- and PGA-LM-administered NC/Nga mice with atopic dermatitis. In terms of the production amount of foxp3 mRNA, which was measured in real-time PCR, the group that was administered PGA-LM was twice as high as the control group. According to a biopsy on the skin on the backs of the mice, the experimental group was also far lower than the control group in terms of epidermis thickness, mast cell infiltration and the number of $CCR3^+$ cells. Therefore, it has been confirmed that the atopic dermatitis symptoms decreased more in the PGA-LM-administered NC/Nga mice than the PGA-HM-administered group by facilitating $CD4^+CD25^+foxp3^+$ Treg cells and suppressing the activity of eosinophils and production of IgE and pro-inflammatory cytokines.
Purpose :NOS2 induce NO Production and NO activate TGF-${\beta}$. The TGF-${\beta}$ is a inhibitor of NOS2. If this negative feedback mechanism operating in radiation pneumonitis model, NOS2 inhibitor may play a role in TGF-${\beta}$ suppression. We planned this study to evaluate the expression patterns of NO, NOS2 and TGF-${\beta}$ in vivo radiation pneumonitis model. Materials and Methods : Sixty sprague-Dawley rat were irradiated 5 Gy or 20 Gy. They were sacrificed 3, 7, 14, 28 and 56 days after irradiation. During sacrifice, we peformed broncho-alveolar lavage (BAL). The BAL fluids were centrifuged and supernatents were used for measure NO and TGF-${\beta}$, and the cells were used for RT-PCR. Results : After 5 Gy of radiation, NO in BAL fluid increased at 28 days in both lung and TGF-${\beta}$ in left lung at 56 days. NO increased in BAL fluid at 28 days in both lung after irradiation and TGF-${\beta}$ in right lung at 28-56 days after 20 Gy of radiation. After 5 Gy of radiation, NOS2 expression was increased in right lung at 14 days, in both lung at 28 days and in left lung at 56 days. TGF-${\beta}$ expression was reduced in both lung at 28 days and increased in left lung at 56 days. Conclusions :The Proposed feedback mechanism of NO, NOS2 and TGF-${\beta}$ was operated in vivo radiation pneumonitis model. At 56 days, however, NOS2 and TGF-${\beta}$ expressed concurrently in left lung after 5 Gy and in both lung after 20 Gy of radiation.
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