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Lee AJ, Yoo EH, Bae YC, Jung SB, Jeon CH. Differential identification of urine crystals with morphologic characteristics and solubility test. J Clin Lab Anal 2022; 36:e24707. [PMID: 36164743 DOI: 10.1002/jcla.24707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Revised: 08/11/2022] [Accepted: 08/12/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Urinary crystals are the most diverse forms of urine sediments. Reference images for typical urinary crystals are common, however, but images for interpreting atypical urinary crystals are very rare. The authors reviewed various forms and solubility tests of urine crystals to interpret atypical crystals found in clinical specimens. METHODS We reviewed textbooks on urinary crystals and articles published in PubMed. Some atypical crystals were confirmed using a solubility test. RESULTS The classification, shape, chemical structure, and solubility of the crystals were summarized. In the solubility test, some crystals showed different results; therefore, a new solubility test was proposed based on the literature review. We presented various types of calcium oxalates. CONCLUSIONS These review articles will be helpful in the examination of atypical crystals found in clinical specimens. The solubility test requires additional studies to discriminate the inconsistent results between the authors.
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Affiliation(s)
- A-Jin Lee
- Department of Laboratory Medicine, Daegu Catholic University School of Medicine, Daegu, South Korea
| | - Eun-Hyung Yoo
- Department of Laboratory Medicine, Daegu Catholic University School of Medicine, Daegu, South Korea
| | - Young-Cheol Bae
- Department of Laboratory Medicine, Daegu Catholic University Medical Center, Daegu, South Korea
| | - Sang Bong Jung
- Department of Clinical Laboratory Science, Daekyeung University, Gyeongsan-si, South Korea
| | - Chang-Ho Jeon
- Department of Laboratory Medicine, Daegu Catholic University School of Medicine, Daegu, South Korea
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Lee JS, Roh MS, Lee HW, Lee EH, Pak MG, Kim K, Nam HY, Kim KM, Jung SB. Prognostic significance of glucose-related protein 94 in colorectal cancer. Pathol Res Pract 2020; 216:153013. [PMID: 32534715 DOI: 10.1016/j.prp.2020.153013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 04/27/2020] [Accepted: 05/10/2020] [Indexed: 12/27/2022]
Abstract
AIMS The expression of glucose-related protein 94 (GRP94), a member of the heat shock protein 90 family, was correlated with a variety of clinicopathological factors and patient survival in a large colorectal cancer (CRC) cohort. We aimed to elucidate the role of GRP94 in the prognosis of CRC patients. METHODS Tissue microarray blocks were generated from 709 CRC samples and immunohistochemically stained for GRP94. RESULTS Of the 709 tumours, 164 (23.1%) and 545 (76.9%) were classified in the low and high expression groups, respectively. GRP94 expression was high in CRC cases with larger tumours (p = 0.005) and advanced pT stage (p = 0.021). GRP94 expression was higher in females than males (p = 0.024). In univariate and multivariate survival analyses, high GRP94 expression was unexpectedly associated with better overall survival in CRC patients younger than 65 years of age (p = 0.001) CONCLUSION: Our conflicting results indicate that GRP94 has the ability to switch between oncogenic and tumour-suppressive roles depending on the conditions and microenvironment of the tumour cells. Furthermore, GRP94 could be a candidate biomarker to predict better prognosis in CRC patients.
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Affiliation(s)
- Jae Seok Lee
- Department of Pathology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, South Korea
| | - Mee Sook Roh
- Department of Pathology, Dong-A University College of Medicine, Busan, South Korea
| | - Hyoun Wook Lee
- Department of Pathology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, South Korea.
| | - Eun Hee Lee
- Department of Pathology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, South Korea
| | - Min Gyoung Pak
- Department of Pathology, Dong-A University College of Medicine, Busan, South Korea
| | - Kyungeun Kim
- Department of Pathology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - Hyun-Yeol Nam
- Department of Nuclear Medicine, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, South Korea
| | - Kwang Min Kim
- Division of Gastroenterology, Department of Medicine, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, South Korea
| | - Sang Bong Jung
- Department of Clinical Laboratory Science, Dong-Eui Institute of Technology, Busan, South Korea
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Lee HW, Ock SY, Kim BK, Kwon SK, Choi YS, Kim JH, Jung SB. Diagnostic value of BRAFV600E mutation analysis in fine needle aspiration for evaluation of thyroid nodules. KMJ 2018. [DOI: 10.7180/kmj.2018.33.1.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Objectives Ultrasound-guided fine-needle aspiration (FNA) is routinely used in the evaluation of thyroid nodules. However, it has several pitfalls, as has been noted in nondiagnostic and indeterminate cases. This study aims to investigate the value of BRAF V600E mutation co-testing in FNA cytology. Method A total of 310 patients underwent BRAF V600E mutation co-testing in FNA cytology on thyroid nodules between June 2013 and June 2014. Of the 310 patients, 69 patients who had undergone a surgery for thyroid nodules were included in this study. The presence of the BRAF V600E mutation was determined by allele-specific polymerase chain reaction amplification of exon 15 of the BRAF gene. Results Of 69 cases, 33 (47.8%) were BRAF V600E mutation positive. The BRAF V600E mutation was not significantly associated with high-risk features such as tumor size, lymph node metastasis, and pathological stage. The respective diagnostic performance of FNA ( P = 0.02), BRAF V600E mutation ( P = 0.03), and ultrasonographic ( P = 0.00) findings was statistically significant. The sensitivity, specificity and positive predictive value of FNA was 64.9%, 83.3%, and 94.8%. The sensitivity, specificity and positive predictive value of BRAF V600E mutation was 56.1%, 91.7%, and 96.9% and the US features was 91.2%, 91.7%, and 98.1% respectively. However, sensitivity of FNA with BRAF V600E mutation (77.2%) was lower than FNA with US (92.9%) and combination all together (92.9%). Conclusion In this study, we found that US features were the most useful in preoperative differential diagnosis of thyroid nodules. BRAF V600E mutation co-testing in FNA cytology was also useful for diagnosis of thyroid tumors.
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Roh MS, Lee HW, Jung SB, Kim K, Lee EH, Park MI, Lee JS, Kim MS. Expression of miR-200c and its clinicopathological significance in patients with colorectal cancer. Pathol Res Pract 2018; 214:350-355. [PMID: 29496312 DOI: 10.1016/j.prp.2018.01.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 01/06/2018] [Accepted: 01/24/2018] [Indexed: 01/21/2023]
Abstract
MicroRNA-200c (miR-200c) is known to play a pivotal role in the regulation of epithelial-to-mesenchymal and mesenchymal-to-epithelial transition processes. However, the biological function of miR-200c in human carcinogenesis remains controversial. We examined the association of miR-200c expression with various clinicopathological factors, including KRAS mutation status and survival, in patients with colorectal cancer (CRC). The expression level of miR-200c was evaluated in 109 paired CRC and normal tissue samples using quantitative reverse transcription polymerase chain reaction. The KRAS mutation status of the CRC samples was determined using the PNAClamp™ KRAS Mutation Detection kit. Compared with the normal tissue group, miR-200c expression was significantly upregulated in the CRCs (P < .001). The expression of miR-200c was increased in CRCs with higher grade (P = .009), advanced stage (P = .042), and lymphovascular invasion (P = .003). Thirty-one CRCs (28.4%) had KRAS mutations in codon 12 or 13. CRCs with KRAS mutations had significantly higher miR-200c expression than CRCs with wild-type KRAS (P = .003). In survival analysis, high miR-200c expression was correlated with worse overall survival (P = .017) and recurrence-free survival (P = .048). Our results indicate that miR-200c is involved in tumor progression and aggressiveness in CRCs, and this oncogenic role of miR-200c may be triggered by activation of the KRAS signaling pathway.
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Affiliation(s)
- Mee Sook Roh
- Department of Pathology, Dong-A University College of Medicine, Busan, South Korea
| | - Hyoun Wook Lee
- Department of Pathology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, South Korea.
| | - Sang Bong Jung
- Department of Clinical Laboratory Science, Dong-Eui Institute of Technology, Busan, South Korea
| | - Kyungeun Kim
- Department of Pathology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - Eun Hee Lee
- Department of Pathology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, South Korea
| | - Moon-Il Park
- Department of Pathology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, South Korea
| | - Jae Seok Lee
- Department of Pathology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, South Korea
| | - Mee-Seon Kim
- Department of Pathology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, South Korea
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Choi YS, Ock S, Kwon S, Jung SB, Seok KH, Kim YJ, Kim BK, Jeong JY. Excessive Iodine Status among School-Age Children in Korea: A First Report. Endocrinol Metab (Seoul) 2017; 32:370-374. [PMID: 28956367 PMCID: PMC5620034 DOI: 10.3803/enm.2017.32.3.370] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 05/25/2017] [Accepted: 06/28/2017] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Korea is considered an iodine sufficient country, and several studies have been conducted regarding iodine status in healthy Korean adults, pregnant women, and preschool children. However, data on iodine status in Korean school-age children are lacking. Therefore, the iodine nutrition status of Korean school-age children was investigated by measuring urine iodine concentration (UIC). METHODS This cross-sectional study conducted between April and September 2016 comprised 373 school-age children. UIC was determined using a modified microplate method employing ammonium persulfate digestion followed by Sandell-Kolthoff reaction. RESULTS The median UIC was 458.2 μg/L. Excessive iodine intake (>300 μg/L) was found in 286 children (76.7%), with extremely high values exceeding 1,000 μg/L in 19.6% of subjects. Insufficient iodine intake (<100 μg/L) was observed in eight children (2.1%). UIC values were not significantly different between sexes. CONCLUSION Korean school-age children showed excessive iodine intake. Therefore, education regarding adequate iodine intake in school-age children is needed.
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Affiliation(s)
- Young Sik Choi
- Department of Internal Medicine, Kosin University College of Medicine, Busan, Korea
| | - Soyoung Ock
- Department of Internal Medicine, Kosin University College of Medicine, Busan, Korea
| | - Sukyoung Kwon
- Department of Internal Medicine, Kosin University College of Medicine, Busan, Korea
| | - Sang Bong Jung
- Department Clinical Laboratory Science, Dong-Eui Institute of Technology, Busan, Korea
| | - Kwang Hyuk Seok
- Department of Biochemistry, Kosin University College of Medicine, Busan, Korea
- Cancer Research Institute, Kosin University College of Medicine, Busan, Korea
| | - Young Jin Kim
- Department of Biochemistry, Kosin University College of Medicine, Busan, Korea
- Cancer Research Institute, Kosin University College of Medicine, Busan, Korea
| | - Bu Kyung Kim
- Department of Internal Medicine, Kosin University College of Medicine, Busan, Korea.
| | - Jee Yeong Jeong
- Department of Biochemistry, Kosin University College of Medicine, Busan, Korea
- Cancer Research Institute, Kosin University College of Medicine, Busan, Korea.
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Jay R, Jung SB, Park BH, Jeong BC, Seo SI, Jeon SS, Lee HM, Choi HY, Jeon HG. Compensatory structural and functional adaptation after radical nephrectomy for renal cell carcinoma according to preoperative stage of chronic kidney disease. Choi DK, Jung SB, Park BH, Jeong BC, Seo SI, Jeon SS, Lee HM, Choi HY, Jeon HG.J Urol. 2015 Oct;194(4):910-5. [Epub 2015 Apr 28]. doi: 10.1016/j.juro.2015.04.093. Urol Oncol 2017; 35:118-119. [PMID: 28159494 DOI: 10.1016/j.urolonc.2016.12.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
PURPOSE We investigated structural hypertrophy and functional hyperfiltration as compensatory adaptations after radical nephrectomy in patients with renal cell carcinoma according to the preoperative chronic kidney disease stage. MATERIALS AND METHODS We retrospectively identified 543 patients who underwent radical nephrectomy for renal cell carcinoma between 1997 and 2012. Patients were classified according to preoperative glomerular filtration rate as no chronic kidney disease-glomerular filtration rate 90ml/min/1.73m2 or greater (230, 42.4%), chronic kidney disease stage II-glomerular filtration rate 60 to less than 90ml/min/1.73m2 (227, 41.8%), and chronic kidney disease stage III-glomerular filtration rate 30 to less than 60ml/min/1.73m2 (86, 15.8%). Computerized tomography performed within 2 months before surgery and 1 year after surgery was used to assess functional renal volume for measuring the degree of hypertrophy of the remnant kidney, and the preoperative and postoperative glomerular filtration rate per unit volume of functional renal volume was used to calculate the degree of hyperfiltration. RESULTS Among all patients (mean age = 56.0y) mean preoperative glomerular filtration rate, functional renal volume, and glomerular filtration rate/functional renal volume were 83.2ml/min/1.73m2, 340.6cm3, and 0.25ml/min/1.73m2/cm3, respectively. The percent reduction in glomerular filtration rate was statistically significant according to chronic kidney disease stage (no chronic kidney disease 31.2% vs. stage II 26.5% vs. stage III 12.8%, P<0.001). However, the degree of hypertrophic functional renal volume in the remnant kidney was not statistically significant (no chronic kidney disease 18.5% vs. stage II 17.3% vs. stage III 16.5%, P = 0.250). The change in glomerular filtration rate/functional renal volume was statistically significant (no chronic kidney disease 18.5% vs. stage II 20.1% vs. stage III 45.9%, P<0.001). Factors that increased glomerular filtration rate/functional renal volume above the mean value were body mass index (P = 0.012), diabetes mellitus (P = 0.023), hypertension (P = 0.015), and chronic kidney disease stage (P<0.001). CONCLUSIONS Patients with a lower preoperative glomerular filtration rate had a smaller reduction in postoperative renal function than those with a higher preoperative glomerular filtration rate due to greater degrees of functional hyperfiltration.
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Rahimi-Midani A, Kim KH, Lee SW, Jung SB, Choi TJ. Isolation and Characterization of a Bacteriophage Preying an Antifungal Bacterium. Plant Pathol J 2016; 32:584-588. [PMID: 27904467 PMCID: PMC5117869 DOI: 10.5423/ppj.nt.07.2016.0153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Revised: 08/01/2016] [Accepted: 08/04/2016] [Indexed: 06/06/2023]
Abstract
Several Bacillus species were isolated from rice field soils, and 16S rRNA gene sequence analysis showed that Bacillus cereus was the most abundant. A strain named BC1 showed antifungal activity against Rhizoctonia solani. Bacteriophages infecting strain BC1 were isolated from the same soil sample. The isolated phage PK16 had an icosahedral head of 100 ± 5 nm and tail of 200 ± 5 nm, indicating that it belonged to the family Myoviridae. Analysis of the complete linear dsDNA genome revealed a 158,127-bp genome with G + C content of 39.9% comprising 235 open reading frames as well as 19 tRNA genes (including 1 pseudogene). Blastp analysis showed that the proteins encoded by the PK16 genome had the closest hits to proteins of seven different bacteriophages. A neighbor-joining phylogenetic tree based on the major capsid protein showed a robust clustering of phage PK16 with phage JBP901 and BCP8-2 isolated from Korean fermented food.
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Affiliation(s)
| | - Kyoung-Ho Kim
- Department of Microbiology, Pukyong National University, Busan 48547,
Korea
| | - Seon-Woo Lee
- Department of Applied Biology, Dong-A University, Busan 49315,
Korea
| | - Sang Bong Jung
- Department of Clinical Laboratory Science, Dong-Eui Institute of Technology, Busan 47230,
Korea
| | - Tae-Jin Choi
- Department of Microbiology, Pukyong National University, Busan 48547,
Korea
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Roh MS, Lee JH, Kang KW, Nam HY, Jung SB, Kim K, Lee EH, Park MI, Kim MS, Lee HW. Phosphorylated 4E-binding protein 1 expression is associated with poor prognosis in small-cell lung cancer. Virchows Arch 2015; 467:667-673. [PMID: 26445970 DOI: 10.1007/s00428-015-1860-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Revised: 08/28/2015] [Accepted: 09/29/2015] [Indexed: 12/25/2022]
Abstract
Phosphorylation of eukaryotic translation initiation factor 4E (eIF4E) binding protein (4E-BP1) results in release of eIF4E, which sequentially relieves translational repression and enhances oncogenic protein synthesis. We assessed the expression of phosphorylated 4E-BP1 (p-4E-BP1) in small-cell lung cancer (SCLC) and its correlation with clinicopathological factors and patient survival. This study included 117 SCLCs, which comprised 108 primary and 9 metastatic tumor tissues. We performed immunohistochemical staining for p-4E-BP1 in 117 tumors and found that 77 (66 %) were positive for p-4E-BP1 with cytoplasmic and/or nuclear immunostaining. The positive rate of p-4E-BP1 staining was significantly higher in never smokers (p = 0.034) and metastatic tumor tissues (p = 0.027). Patients with p-4E-BP1-positive SCLC tended to have poor performance status, although the difference was not statistically significant (p = 0.087). High p-4E-BP1 expression was significantly correlated with worse overall survival (OS) in all cohorts (p = 0.016). After stratification by clinical stage, p-4E-BP1 expression showed a stronger relationship with OS in patients with limited disease (p = 0.008). In addition, when stratified by treatment status, p-4E-BP1 expression was still significantly associated with worse OS in a subgroup of patients who completed treatment (p = 0.021). Our results indicate that p-4E-BP1 expression could represent oncogenic potential and contribute to the progression and aggressiveness of SCLC, suggesting it could be a candidate prognostic biomarker of SCLC, especially in limited disease.
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Affiliation(s)
- Mee Sook Roh
- Department of Pathology, Dong-A University College of Medicine, Busan, South Korea
| | - Ji Hyun Lee
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, South Korea
| | - Kyung Woo Kang
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, South Korea
| | - Hyun-Yeol Nam
- Department of Nuclear Medicine, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, South Korea
| | - Sang Bong Jung
- Department of Clinical Laboratory Science, Dong-Eui Institute of Technology, Busan, South Korea
| | - Kyungeun Kim
- Department of Pathology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - Eun Hee Lee
- Department of Pathology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, 50, Hapsung-dong, Masan Hoewon-gu, Changwon, 630-723, South Korea
| | - Moon-Il Park
- Department of Pathology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, 50, Hapsung-dong, Masan Hoewon-gu, Changwon, 630-723, South Korea
| | - Mee-Seon Kim
- Department of Pathology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, 50, Hapsung-dong, Masan Hoewon-gu, Changwon, 630-723, South Korea
| | - Hyoun Wook Lee
- Department of Pathology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, 50, Hapsung-dong, Masan Hoewon-gu, Changwon, 630-723, South Korea.
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Lee KD, Lee HS, Kim SW, Park T, Hong JC, Chang HK, Jung SB, Jeon CH, Park JW. Clinical significance of melanoma-associated antigen A1-6 expression in sputum of patients with squamous cell carcinoma of the larynx and hypopharynx. Head Neck 2015; 38 Suppl 1:E736-40. [PMID: 25900108 DOI: 10.1002/hed.24081] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/13/2015] [Indexed: 01/29/2023] Open
Abstract
BACKGROUND Several studies have reported the expression of the melanoma-associated antigen (MAGE) gene in head and neck squamous cell carcinoma (HNSCC). In this study, we evaluated the correlations between MAGE expression in sputum and the clinical features and oncologic outcomes of SCC of the larynx and hypopharynx. METHODS We performed a retrospective review of 119 patients treated for SCC of the larynx and hypopharynx and analysis of their induced sputum by nested reverse transcription-polymerase chain reaction (RT-PCR) to detect the MAGE-A1-6 gene. The associations between MAGE expression and clinical characteristics were analyzed. RESULTS Expression of MAGE-A1-6 in sputum was identified in 57 of 119 patients (47.9%), and was independently correlated to double primary cancer (p = .024; odds ratio [OR] = 4.135). Expression of MAGE-A1-6 in sputum was correlated to poor survival. CONCLUSION Expression of MAGE-A1-6 in sputum predicts poor oncologic outcome in patients with SCC of the larynx and hypopharynx. © 2015 Wiley Periodicals, Inc. Head Neck 38: E736-E740, 2016.
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Affiliation(s)
- Kang Dae Lee
- Department of Otolaryngology-Head and Neck Surgery, Kosin University College of Medicine, Busan, Republic of South Korea
| | - Hyoung Shin Lee
- Department of Otolaryngology-Head and Neck Surgery, Kosin University College of Medicine, Busan, Republic of South Korea
| | - Sung Won Kim
- Department of Otolaryngology-Head and Neck Surgery, Kosin University College of Medicine, Busan, Republic of South Korea
| | - Taejung Park
- Department of Otolaryngology-Head and Neck Surgery, Kosin University College of Medicine, Busan, Republic of South Korea
| | - Jong Chul Hong
- Department of Otolaryngology-Head and Neck Surgery, Dong-A University College of Medicine, Busan, Republic of South Korea
| | - Hee Kyung Chang
- Department of Pathology, Kosin University College of Medicine, Busan, Republic of South Korea
| | - Sang Bong Jung
- Department of Clinical Pathology, Gimhae College, Busan, Republic of South Korea
| | - Chang-Ho Jeon
- Department of Laboratory Medicine, Catholic University of Daegu School of Medicine, Daegu, Republic of South Korea
| | - Jong Wook Park
- Department of Immunology, School of Medicine, Keimyung University, Daegu, Republic of South Korea
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Lee HW, Park MI, Kim MS, Kim SH, Roh MS, Kim K, Jung SB, Lee EH. Overexpression of phosphorylated 4E-binding protein 1 and its clinicopathological significances in gastric cancer. Pathol Res Pract 2015; 211:298-302. [PMID: 25661069 DOI: 10.1016/j.prp.2014.12.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Revised: 12/02/2014] [Accepted: 12/25/2014] [Indexed: 12/28/2022]
Abstract
Multiple intracellular transforming signals regulate eukaryotic translation initiation factor 4E (eIF4E)-binding protein (4E-BP1). The signals result in hierarchical phosphorylation of 4E-BP1, resulting in release of eIF4E, relieving translational repression and enhancing oncogenic protein synthesis. This study assessed the expression of phosphorylated 4E-BP1 (p-4E-BP1) in gastric cancer and its correlation with clinicopathological parameters and patient survival. Tissue microarray blocks were generated from 179 gastric carcinomas and immunohistochemically stained for p-4E-BP1. The expression of p-4E-BP1 was higher in tumors that were intestinal-type (P=0.028); had a diameter smaller than 5cm (P=0.001); were lower pathological T stage (P<0.001), N stage (P=0.004), or TNM stage (P<0.001); did not have distant metastasis (P=0.027). High p-4E-BP1 expression significantly correlated with prolonged overall survival (P=0.046) and disease-free survival (P=0.035), but was not an independent prognostic factor in multivariate analysis. Our results indicate that p-4E-BP1 is more highly expressed in early gastric cancers than in advanced ones, and has limited potential as an independent prognostic biomarker in patients with gastric cancer. Larger well-controlled studies with molecular validation are warranted to elucidate more exact prognostic significance and working mechanism of p-4E-BP1 in gastric cancer.
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Affiliation(s)
- Hyoun Wook Lee
- Department of Pathology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, South Korea
| | - Moon-Il Park
- Department of Pathology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, South Korea
| | - Mee-Seon Kim
- Department of Pathology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, South Korea
| | - Seok-Hyun Kim
- Department of Internal Medicine, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, South Korea
| | - Mee Sook Roh
- Department of Pathology, Dong-A University College of Medicine, Busan, South Korea
| | - Kyungeun Kim
- Department of Pathology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - Sang Bong Jung
- Department of Clinical Laboratory Science, Gimhae College, Gimhae, South Korea
| | - Eun Hee Lee
- Department of Pathology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, South Korea.
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Kim MK, Jung SB, Kim JS, Roh MS, Lee JH, Lee EH, Lee HW. Expression of microRNA miR-126 and miR-200c is associated with prognosis in patients with non-small cell lung cancer. Virchows Arch 2014; 465:463-71. [PMID: 25124149 DOI: 10.1007/s00428-014-1640-4] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Revised: 07/22/2014] [Accepted: 08/06/2014] [Indexed: 12/18/2022]
Abstract
MicroRNAs (miRNAs) are short non-coding RNAs that exert a critical influence on tumorigenesis through post-transcriptional modification and are considered to be potential biomarkers for the diagnosis or prognosis of various cancers. Although several miRNAs have been proposed as relevant biomarkers for non-small cell lung cancer (NSCLC), detailed working mechanisms and validated prognostic significance of these miRNAs remain controversial. In this study, we evaluated expression levels of miRNA-126 (miR-126) and miR-200c in 72 NSCLCs and 30 benign lung tissues by quantitative reverse transcription polymerase chain reaction (qRT-PCR) and analyzed the correlation of miRNA expression with a variety of clinicopathological factors and patient survival. Compared with the benign control group, miR-126 expression was significantly downregulated in NSCLCs (p < 0.001), while miR-200c expression was significantly upregulated in NSCLCs (p < 0.001). The expression of miR-126 was significantly higher in NSCLCs with a tumor size of ≤3 cm than in those with a tumor size of >3 cm (p = 0.026). There were no other significant associations between miRNA expression and clinicopathological features. In univariate survival analysis for all NSCLC patients, high miR-200c expression (p = 0.037), large tumor size (p = 0.026), and lymphovascular invasion (p = 0.012) were significantly correlated with worse overall survival. High miR-126 expression was significantly associated with favorable prognosis only in patients with adenocarcinoma (p = 0.033). In multivariate analysis, miR-200c and tumor size remained as independent prognostic factors. Our results suggest that miR-126 might play tumor-suppressive and miR-200c an oncogenic role, and these miR's are potential prognostic biomarkers for NSCLC.
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Affiliation(s)
- Mi Kyeong Kim
- Department of Clinical Laboratory Science, Gimhae College, Gimhae, South Korea
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12
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Lee HY, Kim JI, Cho SH, Ko TY, Kim HS, Park SD, Cho SR, Chang HK, Hwang GJ, Jung SB. Expression of the brother of the regulator of imprinted sites gene in the sputum of patients with lung cancer. Korean J Thorac Cardiovasc Surg 2014; 47:378-83. [PMID: 25207247 PMCID: PMC4157501 DOI: 10.5090/kjtcs.2014.47.4.378] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2013] [Revised: 11/22/2013] [Accepted: 11/24/2013] [Indexed: 11/20/2022]
Abstract
Background Brother of the regulator of imprinted sites (BORIS) is a putative new oncogene that is classified as a cancer germline gene; however, its role in the development of cancer is unclear. This study investigated the expression of BORIS in lung cancer and its clinical implications. Methods The expression of BORIS messenger ribonucleic acid (mRNA) in the sputum of 100 patients with lung cancer (50 with squamous cell carcinoma, 36 with adenocarcinoma, and 14 with small-cell carcinoma) was evaluated by reverse transcription polymerase chain reaction. Results The overall expression rate of BORIS in patients with lung cancer was 36.0%: 19 of 50 squamous cell carcinomas (38.0%), 13 of 36 adenocarcinomas (36.1%), and 4 of 14 (28.6%) small-cell carcinomas. There was no significant difference in the BORIS expression according to age, gender, or histologic type. However, the mRNA expression of BORIS was significantly related to the pathologic cancer stage (p=0.004) and lymph node metastasis (p=0.001). The expression of the melanoma antigen gene family A1–6 was not associated with the expression of BORIS. Conclusion Our results suggest that the expression of BORIS might be a negative prognostic factor in lung cancers and implicate BORIS as a molecular target for immunotherapy.
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Affiliation(s)
- Hae Young Lee
- Department of Thoracic and Cardiovascular Surgery, Kosin University Gospel Hospital, Kosin University College of Medicine
| | - Jong In Kim
- Department of Thoracic and Cardiovascular Surgery, Kosin University Gospel Hospital, Kosin University College of Medicine
| | - Sung Ho Cho
- Department of Thoracic and Cardiovascular Surgery, Kosin University Gospel Hospital, Kosin University College of Medicine
| | - Taek Yong Ko
- Department of Thoracic and Cardiovascular Surgery, Kosin University Gospel Hospital, Kosin University College of Medicine
| | - Hyun Su Kim
- Department of Thoracic and Cardiovascular Surgery, Kosin University Gospel Hospital, Kosin University College of Medicine
| | - Sung Dal Park
- Department of Thoracic and Cardiovascular Surgery, Kosin University Gospel Hospital, Kosin University College of Medicine
| | - Sung Rae Cho
- Department of Thoracic and Cardiovascular Surgery, Kosin University Gospel Hospital, Kosin University College of Medicine
| | - Hee Kyung Chang
- Department of Pathology, Kosin University Gospel Hospital, Kosin University College of Medicine
| | - Guk Jin Hwang
- Department of Familly Medicine, Kosin University Gospel Hospital, Kosin University College of Medicine
| | - Sang Bong Jung
- Department of Clinical Laboratory Science, Gimhae College
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Lee HW, Lee EH, Kim SH, Roh MS, Jung SB, Choi YC. Heat shock protein 70 (HSP70) expression is associated with poor prognosis in intestinal type gastric cancer. Virchows Arch 2013; 463:489-95. [PMID: 23913168 DOI: 10.1007/s00428-013-1461-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Revised: 06/20/2013] [Accepted: 07/16/2013] [Indexed: 12/31/2022]
Abstract
Heat shock protein 70 (HSP70) is a molecular chaperone which plays an important role in cellular protection against various stressful stimuli and in the regulation of cellular growth and apoptosis. This study was conducted in gastric carcinoma (GC) to assess correlations of HSP70 expression with clinicopathological parameters and overall survival (OS). Tissue microarray blocks were constructed from 172 GCs and immunohistochemically stained for HSP70. Low HSP70 expression was found in 122 GCs (71 %), whereas 50 (29 %) had high expression. HSP70 expression was higher in tumours in the cardia (p = 0.008), with non-signet ring cell histology (p < 0.001), of intestinal type (p = 0.045) and of higher pathological T stage (p = 0.026). When considering the cohort as a whole, HSP70 expression did not correlate with OS (p = 0.092). In intestinal type carcinomas, however, high HSP70 expression significantly correlated with worse OS (p = 0.034). These results suggest that HSP70 expression might be an unfavourable prognostic factor in patients with GC, especially of intestinal type.
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Affiliation(s)
- Hyoun Wook Lee
- Department of Pathology, Samsung Changwon Hospital, School of Medicine, Sungkyunkwan University, Changwon, South Korea
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14
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Lee HS, Kim SW, Hong JC, Jung SB, Jeon CH, Park JW, Park SY, Lee KD. Expression of MAGE A1-6 and the clinical characteristics of papillary thyroid carcinoma. Anticancer Res 2013; 33:1731-1735. [PMID: 23564824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
BACKGROUND The expression of melanoma-associated antigen (MAGE) gene has been studied in many types of cancer. In the present study we evaluated the correlation between MAGE expression and the clinical features and oncologic outcomes of patients with papillary thyroid cancer (PTC). MATERIALS AND METHODS We performed a retrospective review of 85 patients who underwent surgery for PTC and analysis of their tumor tissue by nested reverse transcription-polymerase chain reaction (RT-PCR) with the MAGE common primer to detect the MAGE A1-6 gene. The associations between MAGE expression and clinical characteristics were analyzed. RESULTS Expression of MAGE A1-6 in PTC was identified in 31 patients (36.5%). Only papillary thyroid microcarcinoma (PTMC) was significantly related to MAGE expression in our univariate analysis (p=0.002) and multivariate analysis (p=0.006). MAGE had no significant impact on survival. CONCLUSION Expression of MAGE A1-6 in PTC is significantly correlated with the presence of PTMC. Our study suggests that MAGE expression may be related to early-stage PTC.
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Affiliation(s)
- Hyoung Shin Lee
- Department of Otolaryngology-Head and Neck Surgery, Kosin University College of Medicine, Busan, South Korea
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Choi YS, Kwon HJ, Kim BK, Kwon SK, Park YH, Kim JH, Jung SB, Lee CH, Lee SK, Uchino S. A Case of medullary thyroid carcinoma with de novo V804M RET germline mutation. J Korean Med Sci 2013; 28:156-9. [PMID: 23341727 PMCID: PMC3546095 DOI: 10.3346/jkms.2013.28.1.156] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Accepted: 08/27/2012] [Indexed: 11/20/2022] Open
Abstract
Many cases of RET proto-oncogene mutations of hereditary medullary thyroid carcinoma (MTC) have been reported in Korea. However, MTC with V804M RET proto-oncogene germline mutations have not been reported in Korea. A 33-yr-old man was diagnosed with a 0.7-cm sized thyroid nodule. Laboratory testing revealed serum calcitonin was elevated. The patient underwent total thyroidectomy with central compartment neck dissection for the thyroid tumor. RET gene analysis was performed in both the index patient and his family. There were no V804M RET mutation and abnormal laboratory findings within his family except the index patient. Therefore, this patient was a de novo V804M RET germline mutation.
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Affiliation(s)
- Young Sik Choi
- Department of Internal Medicine, Kosin University College of Medicine, Busan, Korea.
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16
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Kim DY, Jung SB, Choi GG, Kim YB, Rhee YH. Biosynthesis of polyhydroxyalkanoate copolyester containing cyclohexyl groups by Pseudomonas oleovorans. Int J Biol Macromol 2001; 29:145-50. [PMID: 11589966 DOI: 10.1016/s0141-8130(01)00144-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Production of polyhydroxyalkanoates (PHAs) substituted with cyclohexyl groups by Pseudomonas oleovorans grown with 4-cyclohexylbutyric acid (4-CHB) and its mixtures with nonanoic acid (NA) was investigated. Addition of NA to medium gave rise to an increase in the total concentration of 3-hydroxy-4-cyclohexylbutyrate repeating unit in the PHAs, indicating that the bioconversion rate of 4-CHB to polyester was significantly improved by the cometabolic effect. Increasing the proportion of NA from 1.0 to 7.5 mM at a concentration of 10 mM total carbon substrate also accelerated the uptake speed of 4-CHB by the organism and resulted in an increase of the ratio of 3-hydroxynonanoate to 3-hydroxyheptanoate from 1.28 to 2.05. Differential scanning calorimetric analysis of the PHAs bearing the corresponding functional groups showed one melting transition and one glass transition temperature varying according to the composition. These results indicated that random copolyesters were obtained from the carbon substrates used in this study.
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Affiliation(s)
- D Y Kim
- Department of Microbiology, Chungnam National University, Daejon 305-764, South Korea
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17
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Kim DK, Kim JJ, Kim JH, Woo YM, Kim S, Yoon DW, Choi CS, Kim I, Park WJ, Lee N, Jung SB, Ahn BY, Nam SW, Yoon SM, Choi WJ. Comparison of two immunization schedules for a Pseudomonas aeruginosa outer membrane proteins vaccine in burn patients. Vaccine 2000; 19:1274-83. [PMID: 11137267 DOI: 10.1016/s0264-410x(00)00235-8] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The aim of the present study was to compare two immunization schedules for a Pseudomonas aeruginosa outer membrane proteins (OMPs) vaccine in burn patients. In a double-blind, randomized and placebo-controlled clinical trial, 95 adult patients with burn injuries in 10% or greater of total body surface area were randomly allocated to either placebo or immunization groups. Three doses of the vaccine (0.5 or 1.0 mg) were administered intramuscularly at either 3- or 7-day intervals. The vaccine was well tolerated, and no severe adverse reactions were observed in any of the vaccinees. After three immunizations, 88 patients were available for evaluation of serum antibody titers. Elevation of OMPs-specific antibody titers in the immunization groups was significantly higher as compared with the placebo group, and the highest antibody response was obtained by immunization with 1.0-mg doses at 3-day intervals. Conventional blood culture, tissue culture of wound biopsy specimens and a nested polymerase chain reaction (PCR) assay of blood specimens were performed to determine the protective efficacy. The results of the nested PCR indicated that the overall detection rate of P. aeruginosa in blood was significantly lower among immunized patients than placebo patients (6.1 vs. 40.0%, P<0.001). Based on these results, we concluded that the P. aeruginosa OMPs vaccine is safe and highly immunogenic in burn patients, especially with 1.0-mg doses at 3-day intervals, and may be effective in conferring protection against P. aeruginosa bacteremia in burn patients.
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Affiliation(s)
- D K Kim
- Hangang Sacred Heart Hospital, School of Medicine, Hallym University, Youngdungpo-ku, 150-020, Seoul, South Korea.
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Lee NG, Jung SB, Ahn BY, Kim YH, Kim JJ, Kim DK, Kim IS, Yoon SM, Nam SW, Kim HS, Park WJ. Immunization of burn-patients with a Pseudomonas aeruginosa outer membrane protein vaccine elicits antibodies with protective efficacy. Vaccine 2000; 18:1952-61. [PMID: 10699346 DOI: 10.1016/s0264-410x(99)00479-x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The aim of this study was to determine whether the antibodies raised in burn patients by active immunization with a Pseudomonas aeruginosa OMPs vaccine have a protective efficacy against infection with P. aeruginosa. The binding patterns with P. aeruginosa OMPs of immunized burn patient sera were similar to the sera of immunized healthy humans as determined by immunoblot and immunoprecipitation analyses. The sera pooled from immunized burn patients after three immunizations showed a significantly higher opsonophagocytic-killing activity than the corresponding pre-immune sera, while the sera from unimmunized patients collected at the same day did not. Passive immunization of mice with post-immune sera of burn patients significantly enhanced the survival rate upon a lethal challenge with P. aeruginosa compared to the pre-immune sera, indicating the protective ability of the antibodies induced in burn patients by immunization. These results suggest that anti-P. aeruginosa OMPs antibodies elicited in burn patients by active immunization are protective against infection with P. aeruginosa, and provide a rational for further development of the vaccine for prevention against P. aeruginosa infection in burn patients.
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Affiliation(s)
- N G Lee
- R&D Center of Bioscience, Institute of Science and Technology, Cheiljedang Corp., Ichon, Kyonggi, South Korea
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Lee N, Ahn B, Jung SB, Kim YG, Kim H, Park WJ. Conformation-dependent antibody response to Pseudomonas aeruginosa outer membrane proteins induced by immunization in humans. FEMS Immunol Med Microbiol 2000; 27:79-85. [PMID: 10617794 DOI: 10.1111/j.1574-695x.2000.tb01415.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Outer membrane proteins (OMPs) of pathogenic bacteria have been used as protective antigens in developing bacterial vaccines. In the present study, we compared the antibody responses to a Pseudomonas aeruginosa OMP vaccine elicited in humans and rabbits by immunization. Immunization with the vaccine induced high titers of serum IgG antibody both in rabbits and humans but reactivities of the induced antibodies with the OMPs were different. The rabbit immune sera recognized most of the OMPs in the vaccine both in immunoblot and immunoprecipitation analyses. In contrast, a great variation in band pattern and intensity was observed among the human immune sera in immunoblot analysis, but not in immunoprecipitation analysis. Denaturation of the OMPs did not affect the binding activity of the rabbit immune sera as determined by ELISA, but substantially reduced those of the human immune sera and anti-OMP IgG purified from a pooled normal human plasma. These data suggest that antibody response to P. aeruginosa OMPs elicited by immunization in humans is mainly directed against discontinuous or conformation-dependent epitopes, which should be taken into account in developing vaccines, especially for OMP-derived synthetic peptides.
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Affiliation(s)
- N Lee
- R and D Center of Bioscience, Institute of Science and Technology, Cheiljedang Corp., Ichon, Kyonggi, South Korea.
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Lee NG, Jung SB, Ahn BY, Kim YG, Lee Y, Jeon YJ, Park WJ. Protection of mice against P. aeruginosa infections by large-scale affinity-purified human IgG specific to P. aeruginosa outer membrane proteins. Vaccine 1999; 18:665-74. [PMID: 10547426 DOI: 10.1016/s0264-410x(99)00273-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
In order to develop an effective means to treat Pseudomonas aeruginosa infections, we designed a large-scale process for purification of human IgG specific to P. aeruginosa outer membrane proteins (Oprs) from normal human sera. The process we developed includes affinity column chromatography using P. aeruginosa Oprs as ligands, protein A column chromatography and ultrafiltration, which enriched P. aeruginosa Oprs-specific IgG antibody by 500-fold. The purified anti-Oprs IgG was specific to the Oprs as confirmed by an ELISA competition assay and retained opsonophagocytic-killing capacity. In vivo protective efficacy of anti-Oprs IgG was evaluated by passive protection assays in mice where the 50% protective dose of anti-Oprs IgG against P. aeruginosa infections was 41 microg/kg, which was 20 times lower than that of normal serum IgG. When administered to mice 3 h after bacterial challenge, only anti-Oprs IgG afforded protection. These data demonstrate the feasibility of use of the purification process in producing functionally active target-specific human antibodies for clinical use and provide a rationale for use of anti-Oprs IgG as a valuable adjunct to treat P. aeruginosa infections.
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Affiliation(s)
- N G Lee
- Department of Biomedical Science, R&D Center, Cheiljedang Inc., Ichon, Kyonggi, South Korea
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Lee NG, Ahn BY, Jung SB, Kim YG, Lee Y, Kim HS, Park WJ. Human anti-Pseudomonas aeruginosa outer membrane proteins IgG cross-protective against infection with heterologous immunotype strains of P. aeruginosa. FEMS Immunol Med Microbiol 1999; 25:339-47. [PMID: 10497864 DOI: 10.1111/j.1574-695x.1999.tb01358.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In order to develop an effective means to treat and prevent Pseudomonas aeruginosa infections, we have purified P. aeruginosa outer membrane protein (Oprs)-specific human IgG antibody using a large-scale affinity column. In this study, we investigated the cross-protective activity of the purified anti-Oprs IgG against various immunotype strains of P. aeruginosa. The anti-Oprs IgG reacted with Oprs isolated from seven Fisher-Devlin immunotype strains of P. aeruginosa and was able to promote opsonophagocytic killing of all seven immunotype strains by human phagocytic cells. Administration of 500 microg anti-Oprs IgG to mice raised the LD50 of the P. aeruginosa strains by 8-250-fold, indicating the protective capacity against heterologous P. aeruginosa strains as well as homologous strains. In contrast, despite high titers against P. (aeruginosa Oprs, total serum IgG isolated from burn patient sera was no better than normal serum IgG in protecting mice from infection with P. aeruginosa. These data demonstrate that the affinity-purified human anti-Oprs IgG could afford protection against heterologous immunotype P. aeruginosa strains and provide a rationale to use anti-Oprs IgG as an adjunct for treatment of P. aeruginosa infections in humans.
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Affiliation(s)
- N G Lee
- R&D Center of Bioscience, Institute of Technology and Science, CheilJedang Inc., Ichon, Kyonggi, South Korea
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Jang IJ, Kim IS, Park WJ, Yoo KS, Yim DS, Kim HK, Shin SG, Chang WH, Lee NG, Jung SB, Ahn DH, Cho YJ, Ahn BY, Lee Y, Kim YG, Nam SW, Kim HS. Human immune response to a Pseudomonas aeruginosa outer membrane protein vaccine. Vaccine 1999; 17:158-68. [PMID: 9987150 DOI: 10.1016/s0264-410x(98)00159-5] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
In order to evaluate in humans the safety and immunogenicity of a Pseudomonas aeruginosa vaccine composed of outer membrane proteins (OMPs), CFC-101, we carried out a phase I/IIa clinical trial in healthy male volunteers. Groups of six volunteers were immunized either subcutaneously (s.c.) or intramuscularly (i.m.) with three dosages of the vaccine three times at 7-day intervals. The vaccine was well tolerated by volunteers. Local reactions in the injection sites were generally mild and transient. Significant increases in OMP-specific antibody were observed in both route groups after vaccinations but was higher in the i.m.-immunized group, where vaccination with 0.5 or 1.0 mg doses yielded 100% seroconversion. The specificity of the induced antibodies to P. aeruginosa OMP was demonstrated by western blot analysis and immunoprecipitation assay. An increase in Clq-binding capacity and ability to confer mice protection from lethal challenges with P. aeruginosa indicated the protective efficacy of the elicited antibodies. Based on these data, we concluded that the P. aeruginosa OMP vaccine is safe and effective in humans with an optimal dose of 0.5 and 1.0 mg and that i.m. is the better route than s.c. for this vaccine.
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Affiliation(s)
- I J Jang
- Department of Pharmacology and Microbiology, College of Medicine, Seoul National University, Korea
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Koo JH, Jung SB, Byun HS, Kim YS. Cloning and sequencing of genes encoding malonate decarboxylase in Acinetobacter calcoaceticus. Biochim Biophys Acta 1997; 1354:49-54. [PMID: 9375791 DOI: 10.1016/s0167-4781(97)00134-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Malonate decarboxylase from Acinetobacter calcoaceticus was isolated and characterized (Kim, Y.S., Byun, H.S., J. Biol. Chem. 269 (1994) 29636-29641), and its subunits were reanalyzed recently to be alpha, beta, gamma, and delta. The genes for the subunits, MdcA (548 a.a.), B (295 a.a.), C (238 a.a.), and D (102 a.a.), of the enzyme have been cloned by using oligonucleotide primers deduced from amino acid sequences of peptides isolated from the purified enzyme, and sequenced to be clustered in an operon in the order of A-D-B-C. The operon was found to encode more genes than mdcABCD. The Escherichia coli, transformed with the vector containing the insert mdcADBC and about 1.7 kb of an upstream region, expressed the four subunits of the enzyme but the proteins did not show enzyme activity. It indicates that, like the enzymes from Malonomonas rubra and Klebsiella pneumoniae, more genes are needed for the formation of the functional malonate decarboxylase.
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Affiliation(s)
- J H Koo
- Department of Biochemistry, College of Science, Bioproducts Research Center, Yonsei University, Seoul, South Korea
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