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Li L, Park YR, Shrestha SK, Cho HK, Soh Y. Suppression of Inflammation, Osteoclastogenesis and Bone Loss by PZRAS Extract. J Microbiol Biotechnol 2020; 30:1543-1551. [PMID: 32807758 PMCID: PMC9728228 DOI: 10.4014/jmb.2004.04016] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 07/10/2020] [Accepted: 08/12/2020] [Indexed: 12/15/2022]
Abstract
Panax ginseng has a wide range of activities including a neuroprotective effect, skin protective effects, enhanced DNA repairing, anti-diabetic activity, and protective effects against vascular inflammation. In the present study, we sought to discover the inhibitory effects of a mixture of natural products containing Panax ginseng, Ziziphus jujube, Rubi fructus, Artemisiae asiaticae and Scutellaria baicalensis (PZRAS) on osteoclastogenesis and bone remodeling, as neither the effects of a mixture containing Panax ginseng extract, nor its molecular mechanism on bone inflammation, have been clarified yet. PZRAS upregulated the levels of catalase (CAT), superoxide dismutase (SOD), glutathione reductase (GSH-R) and glutathione peroxidase (GSH-Px) and reduced malondialdehyde (MDA) in LPS-treated RAW264.7 cells. Moreover, treatment with PZRAS decreased the production of IL-1β and TNF-α. PZRAS also inhibited osteoclast differentiation through inhibiting osteoclastspecific genes like MMP-2, 9, cathepsin K, and TRAP in RANKL-treated RAW264.7 cells. Additionally, PZRAS has inhibitory functions on the RANKL-stimulated activation of ERK and JNK, which lead to a decrease in the expression of NFATc1 and c-Fos. In an in vivo study, bone resorption induced by LPS was recovered by treatment with PZRAS in bone volume per tissue volume (BV/TV) compared to control. Furthermore, the ratio of eroded bone surface of femurs was significantly increased in LPStreated mice compared to vehicle group, but this ratio was significantly reversed in PZRAS-treated mice. These results suggest that PZRAS could prevent or treat disorders with abnormal bone loss.
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Affiliation(s)
- Liang Li
- Department of Dental Pharmacology, School of Dentistry, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Young-Ran Park
- Department of Dental Pharmacology, School of Dentistry, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Saroj Kumar Shrestha
- Department of Dental Pharmacology, School of Dentistry, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Hyoung-Kwon Cho
- Hanpoong Pharm and Foods Co., Ltd., Jeonju 561-841, Republic of Korea
| | - Yunjo Soh
- Department of Dental Pharmacology, School of Dentistry, Jeonbuk National University, Jeonju 54896, Republic of Korea,Department of Pharmacology, School of Pharmacy and Institute of New Drug Development, Jeonbuk National University, Jeonju 54896, Republic of Korea,Corresponding author Phone: +82-63-270-4038 Fax: +82-63-270-4037 E-mail:
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Liu YC, Park YR, Kim SL, Lee ST, Kim SW. MicroRNA-30a Inhibits Colorectal Cancer Metastasis Through Down-Regulation of Type I Insulin-Like Growth Factor Receptor. Dig Dis Sci 2017; 62:3040-3049. [PMID: 28932920 DOI: 10.1007/s10620-017-4763-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [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: 02/15/2017] [Accepted: 09/13/2017] [Indexed: 12/19/2022]
Abstract
BACKGROUND miR-30a expression is down-regulated and regulates tumor suppressors in various cancers. AIM We investigated the mechanisms underlying the biological role of miR-30a in CRC. METHODS MicroRNA, mRNA, and protein expression were analyzed by quantitative real-time PCR and Western blot. The migration and invasion abilities of CRC were determined by wound healing assay, and trans-well migration and invasion. A luciferase reporter assay was used to confirm the targets of miR-30a. RESULTS miR-30a expression was significantly down-regulated in CRC tissues and in CRC tissue with lymph node metastasis compared to CRC tissue without metastasis. Overexpression of miR-30a suppressed migration and invasion through insulin-like growth factor 1 receptor (IGF1R) in CRC cells. miR-30a suppresses IGF1R protein expression and inhibits β-catenin or p-AKT and increases E-cadherin expression. The IGF1R expression level is also up-regulated in CRC tumors and inversely correlated with miR-30a in CRC specimens. CONCLUSIONS miR-30a functions as a tumor-suppressive miRNA, which may provide a therapeutic strategy for metastasis of CRC.
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Affiliation(s)
- Y C Liu
- Department of Physiology, Chonbuk National University Medical School, Jeonju, Republic of Korea
| | - Y R Park
- Department of Internal Medicine of Chonbuk, National University Hospital, Chonbuk National University Medical School, Jeonju, Republic of Korea
- Department of Internal Medicine, Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute, Chonbuk National University Hospital, Chonbuk National University Medical School, 20 Geonji-ro, Deokjin-gu, Jeonju, Jeonbuk, 54907, Republic of Korea
| | - S L Kim
- Department of Internal Medicine of Chonbuk, National University Hospital, Chonbuk National University Medical School, Jeonju, Republic of Korea
- Department of Internal Medicine, Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute, Chonbuk National University Hospital, Chonbuk National University Medical School, 20 Geonji-ro, Deokjin-gu, Jeonju, Jeonbuk, 54907, Republic of Korea
| | - S T Lee
- Department of Internal Medicine of Chonbuk, National University Hospital, Chonbuk National University Medical School, Jeonju, Republic of Korea
- Department of Internal Medicine, Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute, Chonbuk National University Hospital, Chonbuk National University Medical School, 20 Geonji-ro, Deokjin-gu, Jeonju, Jeonbuk, 54907, Republic of Korea
| | - S W Kim
- Department of Internal Medicine of Chonbuk, National University Hospital, Chonbuk National University Medical School, Jeonju, Republic of Korea.
- Department of Internal Medicine, Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute, Chonbuk National University Hospital, Chonbuk National University Medical School, 20 Geonji-ro, Deokjin-gu, Jeonju, Jeonbuk, 54907, Republic of Korea.
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Park YR, Kim SL, Lee MR, Seo SY, Lee JH, Kim SH, Kim IH, Lee SO, Lee ST, Kim SW. MicroRNA-30a-5p (miR-30a) regulates cell motility and EMT by directly targeting oncogenic TM4SF1 in colorectal cancer. J Cancer Res Clin Oncol 2017; 143:1915-1927. [PMID: 28528497 DOI: 10.1007/s00432-017-2440-4] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Accepted: 05/12/2017] [Indexed: 12/27/2022]
Abstract
PURPOSE Colorectal cancer (CRC) is one of the leading causes of cancer death worldwide, and many oncogenes and tumor suppressor genes are involved in CRC. MicroRNAs (miRNAs) are small non-coding RNAs that can negatively regulate gene expression. Previous studies have revealed that miRNAs regulate the development and progression of many cancers. In this study, we investigated the role of microRNA-30a-5p (miR-30a) in CRC and its unknown mechanisms. METHODS qRT-PCR was used to detect miR-30a and TM4SF1 mRNA expression in CRC specimens and cell lines. CRC cell migration and invasion were assessed after transfection with miR-30a or TM4SF1 using wound healing and trans-well migration and invasion assays. Transmembrane-4-L-six-family protein (TM4SF1) was validated as a target of miR-30a in CRC through luciferase reporter assay and bioinformatics algorithms. Moreover, two EMT regulators, E-cadherin and VEGF, were also identified using Western blotting and immunohistochemistry. RESULTS We found that miR-30a was down-regulated in CRC tumor tissues and cell lines, and miR-30a was inversely associated with advanced stage and lymph node metastatic status compared with normal tissues. miR-30a decreased migration and invasion in CRC cell lines, and miR-30a overexpression not only down-regulated TM4SF1 mRNA and protein expression, but also inhibited the expression of VEGF and enhanced expression of E-cadherin. We also showed that TM4SF1 was up-regulated in CRC tumor specimens compared with adjacent normal tissues, and TM4SF1 expression was significantly associated with advanced stage and lymph node status compared with adjacent normal tissues. CONCLUSIONS These results suggest that miR-30a is an important regulator of TM4SF1, VEGF, and E-cadherin for CRC lymph node metastasis, a potential new therapeutic target in CRC.
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Affiliation(s)
- Y R Park
- Department of Internal Medicine, Chonbuk National University Hospital, Chonbuk National University Medical School, Jeonju, Republic of Korea
- Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute, Chonbuk National University Hospital, Chonbuk National University Medical School, 20 Geonji-ro, Deokjin-gu, Jeonju, Jeonbuk, 54896, Republic of Korea
| | - S L Kim
- Department of Internal Medicine, Chonbuk National University Hospital, Chonbuk National University Medical School, Jeonju, Republic of Korea
- Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute, Chonbuk National University Hospital, Chonbuk National University Medical School, 20 Geonji-ro, Deokjin-gu, Jeonju, Jeonbuk, 54896, Republic of Korea
| | - M R Lee
- Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute, Chonbuk National University Hospital, Chonbuk National University Medical School, 20 Geonji-ro, Deokjin-gu, Jeonju, Jeonbuk, 54896, Republic of Korea
- Department of Surgery, Chonbuk National University Hospital, Chonbuk National University Medical School, Jeonju, Republic of Korea
| | - S Y Seo
- Department of Internal Medicine, Chonbuk National University Hospital, Chonbuk National University Medical School, Jeonju, Republic of Korea
- Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute, Chonbuk National University Hospital, Chonbuk National University Medical School, 20 Geonji-ro, Deokjin-gu, Jeonju, Jeonbuk, 54896, Republic of Korea
| | - J H Lee
- Department of Preventive Medicine, Chonbuk National University Medical School, Jeonju, Jeonbuk, Republic of Korea
| | - S H Kim
- Department of Internal Medicine, Chonbuk National University Hospital, Chonbuk National University Medical School, Jeonju, Republic of Korea
- Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute, Chonbuk National University Hospital, Chonbuk National University Medical School, 20 Geonji-ro, Deokjin-gu, Jeonju, Jeonbuk, 54896, Republic of Korea
| | - I H Kim
- Department of Internal Medicine, Chonbuk National University Hospital, Chonbuk National University Medical School, Jeonju, Republic of Korea
- Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute, Chonbuk National University Hospital, Chonbuk National University Medical School, 20 Geonji-ro, Deokjin-gu, Jeonju, Jeonbuk, 54896, Republic of Korea
| | - S O Lee
- Department of Internal Medicine, Chonbuk National University Hospital, Chonbuk National University Medical School, Jeonju, Republic of Korea
- Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute, Chonbuk National University Hospital, Chonbuk National University Medical School, 20 Geonji-ro, Deokjin-gu, Jeonju, Jeonbuk, 54896, Republic of Korea
| | - S T Lee
- Department of Internal Medicine, Chonbuk National University Hospital, Chonbuk National University Medical School, Jeonju, Republic of Korea
- Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute, Chonbuk National University Hospital, Chonbuk National University Medical School, 20 Geonji-ro, Deokjin-gu, Jeonju, Jeonbuk, 54896, Republic of Korea
| | - Sang Wook Kim
- Department of Internal Medicine, Chonbuk National University Hospital, Chonbuk National University Medical School, Jeonju, Republic of Korea.
- Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute, Chonbuk National University Hospital, Chonbuk National University Medical School, 20 Geonji-ro, Deokjin-gu, Jeonju, Jeonbuk, 54896, Republic of Korea.
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Chung IY, Lee JW, Lee JS, Park YR, Lee Y, Lee SB, Kim HJ, Ko BS, Son BH, Ahn SH. Abstract P6-09-38: Interaction between body mass index and hormone receptor status as a prognostic factor in node-positive breast cancer. Cancer Res 2017. [DOI: 10.1158/1538-7445.sabcs16-p6-09-38] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Purpose: The aim of this study was to investigate the interaction between BMI at breast cancer diagnosis and the various factors including hormone-receptor, menopausal and nodal status, and to find a specific subgroup where BMI has an effect on breast cancer prognosis.
Methods: We retrospectively analyzed the data of 8,763 non-metastatic invasive breast cancer patients from the Asan Medical Center's research database. Overall survival (OS) and breast cancer-specific survival (BCSS) among BMI groups were compared using the Kaplan-Meier method and Cox proportional hazard model with interaction term.
Results: Only in node-positive breast cancer, there was a significant interaction between obesity (BMI ≥ 30.0 kg/m2) at diagnosis and positive hormone receptor which showed worse overall survival (OS) and breast cancer specific survival (BCSS) than normal weight patients (adjusted hazard ratio [HR] = 1.65, 95% confidence interval [CI] = 1.01 to 2.69 and HR = 1.90, 95% CI = 1.15 to 3.15, respectively). Underweight (BMI<18.50 kg/m2) which interacted with negative hormone receptor status in node-positive breast cancer was associated with decreased OS (HR = 2.01, 95% CI = 1.02 to 3.98) and BCSS (HR = 2.15, 95% CI = 1.08 to 4.26). There was no significant interaction between BMI and hormone receptor status in node-negative setting and BMI did not interact with menopausal status in any population.
Conclusions: BMI interacts with hormone receptor status in node positive setting, thereby playing a role in the breast cancer prognosis.
Citation Format: Chung IY, Lee JW, Lee JS, Park YR, Lee Y, Lee SB, Kim HJ, Ko BS, Son BH, Ahn SH. Interaction between body mass index and hormone receptor status as a prognostic factor in node-positive breast cancer [abstract]. In: Proceedings of the 2016 San Antonio Breast Cancer Symposium; 2016 Dec 6-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2017;77(4 Suppl):Abstract nr P6-09-38.
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Affiliation(s)
- IY Chung
- Asan Medical Center, Seoul, Republic of Korea
| | - JW Lee
- Asan Medical Center, Seoul, Republic of Korea
| | - JS Lee
- Asan Medical Center, Seoul, Republic of Korea
| | - YR Park
- Asan Medical Center, Seoul, Republic of Korea
| | - Y Lee
- Asan Medical Center, Seoul, Republic of Korea
| | - SB Lee
- Asan Medical Center, Seoul, Republic of Korea
| | - HJ Kim
- Asan Medical Center, Seoul, Republic of Korea
| | - BS Ko
- Asan Medical Center, Seoul, Republic of Korea
| | - BH Son
- Asan Medical Center, Seoul, Republic of Korea
| | - SH Ahn
- Asan Medical Center, Seoul, Republic of Korea
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Kim HY, Kim SL, Park YR, Liu YC, Seo SY, Kim SH, Kim IH, Lee SO, Lee ST, Kim SW. Balsalazide Potentiates Parthenolide-Mediated Inhibition of Nuclear Factor-κB Signaling in HCT116 Human Colorectal Cancer Cells. Intest Res 2015; 13:233-41. [PMID: 26130998 PMCID: PMC4479738 DOI: 10.5217/ir.2015.13.3.233] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Revised: 12/16/2014] [Accepted: 12/29/2014] [Indexed: 01/27/2023] Open
Abstract
BACKGROUND/AIMS Balsalazide is an anti-inflammatory drug used in the treatment of inflammatory bowel disease. Balsalazide can reduce inflammatory responses via several mechanisms, including inhibition of nuclear factor-κB (NF-κB) activity. Parthenolide (PT) inhibits NF-κB and exerts promising anticancer effects by promoting apoptosis. The present investigated the antitumor effects of balsalazide, combined with PT, on NF-κB in a representative human colorectal carcinoma cell line, HCT116. METHODS We counted cells and conducted annexin-V assays and cell cycle analysis to measure apoptotic cell death. Western blotting was used investigate the levels of proteins involved in apoptosis. RESULTS PT and balsalazide produced synergistic anti-proliferative effects and induced apoptotic cell death. The combination of balsalazide and PT markedly suppressed nuclear translocation of the NF-κB p65 subunit and the phosphorylation of inhibitor of NF-κB. Moreover, PT and balsalazide dramatically enhanced NF-κB p65 phosphorylation. Apoptosis, through the mitochondrial pathway, was confirmed by detecting effects on Bcl-2 family members, cytochrome c release, and activation of caspase-3 and -8. CONCLUSIONS Combination treatment with PT and balsalazide may offer an effective strategy for the induction of apoptosis in HCT116 cells.
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Affiliation(s)
- Hyun-Young Kim
- Department of Internal Medicine, Medical School of Chonbuk National University, Jeonju, Korea
| | - Se-Lim Kim
- Department of Internal Medicine, Medical School of Chonbuk National University, Jeonju, Korea. ; Colon Carcinogenesis and Inflammation Laboratory, Biomedical Research Institute of Chonbuk National University Hospital, Jeonju, Korea
| | - Young-Ran Park
- Department of Internal Medicine, Medical School of Chonbuk National University, Jeonju, Korea. ; Colon Carcinogenesis and Inflammation Laboratory, Biomedical Research Institute of Chonbuk National University Hospital, Jeonju, Korea
| | - Yu-Chuan Liu
- Department of Internal Medicine, Medical School of Chonbuk National University, Jeonju, Korea. ; Colon Carcinogenesis and Inflammation Laboratory, Biomedical Research Institute of Chonbuk National University Hospital, Jeonju, Korea
| | - Seung Young Seo
- Department of Internal Medicine, Medical School of Chonbuk National University, Jeonju, Korea
| | - Seong Hun Kim
- Department of Internal Medicine, Medical School of Chonbuk National University, Jeonju, Korea
| | - In Hee Kim
- Department of Internal Medicine, Medical School of Chonbuk National University, Jeonju, Korea
| | - Seung Ok Lee
- Department of Internal Medicine, Medical School of Chonbuk National University, Jeonju, Korea
| | - Soo Teik Lee
- Department of Internal Medicine, Medical School of Chonbuk National University, Jeonju, Korea. ; Colon Carcinogenesis and Inflammation Laboratory, Biomedical Research Institute of Chonbuk National University Hospital, Jeonju, Korea
| | - Sang Wook Kim
- Department of Internal Medicine, Medical School of Chonbuk National University, Jeonju, Korea. ; Colon Carcinogenesis and Inflammation Laboratory, Biomedical Research Institute of Chonbuk National University Hospital, Jeonju, Korea
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Lee WS, Kim N, Park YR, Oh HH, Myung E, Kim SH, Yu HM, Kim MY, Oak CY, Chung CY, Park HC, Myung DS, Cho SB, Joo YE. Myeloid cell leukemia-1 promotes epithelial-mesenchymal transition of human gastric cancer cells. Oncol Rep 2015; 34:1011-6. [PMID: 26058661 DOI: 10.3892/or.2015.4040] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Accepted: 05/04/2015] [Indexed: 11/06/2022] Open
Abstract
Epithelial-mesenchymal transition (EMT) is a critical process that occurs during cancer progression, and cancer stem cells have been shown to acquire the EMT phenotype. Myeloid cell leukemia-1 (Mcl-1) has been implicated in cancer progression and is overexpressed in a variety of human cancers. However, the interaction between Mcl-1 and EMT in human gastric cancer (GC) is unclear. We investigated the impact of Mcl-1 expression levels on EMT and the underlying signaling pathways in human GC cells. We used the human GC cell lines, AGS and SNU638, and small interfering RNAs (siRNAs) to evaluate the effects of Mcl-1 knockdown on cell adhesion, migration and invasion. Expression of Mcl-1 and other target genes was determined using reverse transcription-polymerase chain reaction assays and western blotting. The results revealed that expression levels of Mcl-1 mRNA and protein in the AGS and SNU638 cells were reduced following transfection with Mcl-1 siRNAs. Knockdown of Mcl-1 led to increased cellular adhesion to fibronectin and collagen. Expression levels of vimentin, MMP-2, MMP-9 and Snail protein were decreased following knockdown of Mcl-1. However, expression of E-cadherin was increased in the AGS cells following knockdown of Mcl-1. The expression of cancer stemness markers, such as CD44 and CD133, was not altered by knockdown of Mcl-1. Knockdown of Mcl-1 suppressed tumor cell migration and invasion in both human GC cell lines. Signaling cascades, including the β-catenin, MEK1/2, ERK1/2 and p38 pathways, were significantly blocked by knockdown of Mcl-1. Our results indicate that Mcl-1 expression induces EMT via β-catenin, MEK1/2 and MAPK signaling pathways, which subsequently stimulates the invasive and migratory capacity of human GC cells.
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Affiliation(s)
- Wan-Sik Lee
- Department of Internal Medicine, Chonnam National University Medical School, Gwangju 501-190, Republic of Korea
| | - Nuri Kim
- Department of Internal Medicine, Chonnam National University Medical School, Gwangju 501-190, Republic of Korea
| | - Young-Ran Park
- Department of Internal Medicine, Chonnam National University Medical School, Gwangju 501-190, Republic of Korea
| | - Hyung-Hoon Oh
- Department of Internal Medicine, Chonnam National University Medical School, Gwangju 501-190, Republic of Korea
| | - Eun Myung
- Department of Internal Medicine, Chonnam National University Medical School, Gwangju 501-190, Republic of Korea
| | - Seung-Hun Kim
- Department of Internal Medicine, Chonnam National University Medical School, Gwangju 501-190, Republic of Korea
| | - Hyung-Min Yu
- Department of Internal Medicine, Chonnam National University Medical School, Gwangju 501-190, Republic of Korea
| | - Mi-Young Kim
- Department of Internal Medicine, Chonnam National University Medical School, Gwangju 501-190, Republic of Korea
| | - Chan-Young Oak
- Department of Internal Medicine, Chonnam National University Medical School, Gwangju 501-190, Republic of Korea
| | - Cho-Yun Chung
- Department of Internal Medicine, Chonnam National University Medical School, Gwangju 501-190, Republic of Korea
| | - Hyung-Chul Park
- Department of Internal Medicine, Chonnam National University Medical School, Gwangju 501-190, Republic of Korea
| | - Dae-Seong Myung
- Department of Internal Medicine, Chonnam National University Medical School, Gwangju 501-190, Republic of Korea
| | - Sung-Bum Cho
- Department of Internal Medicine, Chonnam National University Medical School, Gwangju 501-190, Republic of Korea
| | - Young-Eun Joo
- Department of Internal Medicine, Chonnam National University Medical School, Gwangju 501-190, Republic of Korea
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Choi JB, Park YR, Kim SJ, Kang HS, Park BY, Kim IS, Yang YS, Kim GB. Pressure distribution and wall shear stress in stenosis and abdominal aortic aneurysm by computational fluid dynamics modeling (CFD). KOREAN J CHEM ENG 2013. [DOI: 10.1007/s11814-013-0215-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Park YR, Kim SJ, Kim SJ, Kim JS, Kang HS, Kim GB. A Study on Hemodynamic Characteristics at the Stenosed Blood Vessel Using Computational Fluid Dynamics Simulations. J Biomed Nanotechnol 2013; 9:1137-45. [DOI: 10.1166/jbn.2013.1516] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Abstract
Interest in neural networks has expanded rapidly in recent years. Selecting the best structure for a given task, however, remains a critical issue in neural-network design. Although the performance of a network clearly depends on its structure, the procedure for selecting the optimal structure has not been thoroughly investigated, it is well known that the number of hidden units must be sufficient to discriminate each observation correctly. A large number of hidden units requires extensive computational time for training and often times prediction results may not be as accurate as expected. This study attempts to apply the principal component analysis (PCA) to determine the structure of a multilayered neural network for time series forecasting problems. The main focus is to determine the number of hidden units for a multilayered feedforward network. One empirical experiment with sunspot data is used to demonstrate the usefulness of the proposed approach.
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Affiliation(s)
- Y R Park
- Sch. of Bus., Savannah State Coll., GA
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Park YR, Shim JY, Kim GB, Kim SJ, Kang HS, Kim JS, Kim MH, Hong CU, Kim SJ. Structural Analysis for Constructing a Balloon Type Extracoporeal Membrane Oxygenator using CFD Analysis. Korean Chemical Engineering Research 2011. [DOI: 10.9713/kcer.2011.49.2.238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Kim GB, Park YR, Kim SJ, Hong CU, Kang HS, Kim JS, Kim SJ, Kim MH. Study on the Fluid Dynamics Modeling in Artificial Lung Assist Device. Korean Chemical Engineering Research 2011. [DOI: 10.9713/kcer.2011.49.2.230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Kim GB, Cheong WS, Park YR, Kim SJ, Kim SJ, Kang HS, Kim JS, Hong CU. Study of the Surface Acoustic Wave Biosensors for Detection of the Immunoglobulin G. Korean Chemical Engineering Research 2011. [DOI: 10.9713/kcer.2011.49.2.224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Choi HJ, Nepal M, Park YR, Lee HK, Oh SR, Soh Y. Stimulation of chondrogenesis in ATDC5 chondroprogenitor cells and hypertrophy in mouse by Genkwadaphnin. Eur J Pharmacol 2011; 655:9-15. [DOI: 10.1016/j.ejphar.2011.01.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2010] [Revised: 12/10/2010] [Accepted: 01/07/2011] [Indexed: 10/18/2022]
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Kim KA, Choi HJ, Kim BG, Park YR, Kim JS, Ryu JH, Soh YJ. Hexane Soluble Fraction of Chungpesagan-tang Exhibits Protective Effect against Hypoxia/Reoxygenation-Induced N2a Cell Damage. Biomol Ther (Seoul) 2008. [DOI: 10.4062/biomolther.2008.16.4.377] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
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Chae SC, Park YR, Shim SC, Lee IK, Chung HT. Eotaxin-3 gene polymorphisms are associated with rheumatoid arthritis in a Korean population. Hum Immunol 2005; 66:314-20. [PMID: 15784470 DOI: 10.1016/j.humimm.2005.01.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2004] [Revised: 12/27/2004] [Accepted: 01/03/2005] [Indexed: 11/23/2022]
Abstract
The eotaxin gene family (eotaxin, eotaxin-2, and eotaxin-3) has been implicated in the recruitment of eosinophils, basophiles and Th2 lymphocytes that is a central aspect of allergic diseases. We previously suggested that Eo2+179T>C and Eo2+275C>T of the eotaxin-2, and Eo3+2497T>G of the eotaxin-3 were significantly associated with susceptibility to asthma. To precisely determine whether these single nucleotide polymorphisms (SNPs) are associated with susceptibility to autoimmune disease such as rheumatoid arthritis (RA) in Koreans, we analyzed the genotype and allele frequencies for four SNPs (Eo2+179T>C, Eo2+275C>T, Eo2+304A>C, and Eo2+1272A>G) of the eotaxin-2, and three SNPs (Eo3+77C>T, Eo3+1577G>A, and Eo3+2497T>G) of the eotaxin-3 by single-base extension method. Although the genotype and allele frequencies of the eotaxin-2 SNPs gene between patients with RA and controls were not significantly different, the genotype and allele frequencies of the eotaxin-3SNPs between them were significantly associated. The genotype frequencies of Eo3+1577G>A and Eo3+2497T>G in patients with RA were significantly different from those in the controls (p = 0.0001 and p < 0.0001, respectively). Our results strongly suggest that the polymorphisms of eotaxin-3 might be associated with susceptibility to RA.
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Affiliation(s)
- Soo-Cheon Chae
- Genome Research Center for Immune Disorders, Wonkwang University School of Medicine, Iksan, Chonbuk, Korea.
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Chae SC, Park YR, Shim SC, Yoon KS, Chung HT. The polymorphisms of Th1 cell surface gene Tim-3 are associated in a Korean population with rheumatoid arthritis. Immunol Lett 2005; 95:91-5. [PMID: 15325803 DOI: 10.1016/j.imlet.2004.06.008] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2004] [Revised: 06/16/2004] [Accepted: 06/21/2004] [Indexed: 12/12/2022]
Abstract
The family of T-cell immunoglobulin domain and mucin domain (TIM) proteins is identified to be expressed on T cells. A member of TIM family, TIM-3 is selectively expressed on the surface of differentiated Th1 cells. TIM-3 might have an important role in the induction of autoimmune diseases by regulating macrophage activation and interacts with TIM-3 ligand to regulate Th1 responses. In the present study, we analyzed the association of the genotype and allele frequencies between rheumatoid arthritis (RA) patients and the controls without RA using large samples size at the -1516G>T, -574T>G and 4259G>T polymorphic sites of human Tim-3 gene. We further investigated the relationships between the genotypes of each single nucleotide polymorphisms (SNPs) and C-reactive protein (CRP) or rheumatoid factor (RF) levels in RA patients. The genotype and allele frequencies of the -574T>G (P = 0.001 and 0.001, respectively) as well as the 4259G>T (P = 0.001 ands 0.003, respectively) between RA patients and non-RA controls were significantly different. These results strongly suggest that -574T>G and 4259G>T polymorphism of the Tim-3 might be associated with susceptibility to RA.
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Affiliation(s)
- Soo-Cheon Chae
- Genome Research Center for Immune Disorders, Wonkwang University School of Medicine, Iksan, Chonbuk 570-749, Korea
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Chae SC, Park YR, Oh GJ, Lee JH, Chung HT. The suggestive association of eotaxin-2 and eotaxin-3 gene polymorphisms in Korean population with allergic rhinitis. Immunogenetics 2004; 56:760-4. [PMID: 15580493 DOI: 10.1007/s00251-004-0746-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2004] [Revised: 10/28/2004] [Indexed: 11/25/2022]
Abstract
The eotaxin gene family (eotaxin, eotaxin-2 and eotaxin-3) has been implicated in the recruitment of eosinophils, basophiles and Th2 lymphocytes that are central aspects of allergic diseases. To determine whether single-nucleotide polymorphisms (SNPs) of the eotaxin-2 and eotaxin-3 genes are associated with susceptibility to allergic rhinitis, we scanned 178 allergic rhinitis patients and 281 controls without allergic rhinitis using the direct sequencing and single-base extension (SBE) methods. We also calculated the haplotype frequencies between +179T>C and +275C>T of eotaxin-2 and +2497T>G of eotaxin-3 in both controls and allergic rhinitis patients. The haplotype frequency between controls and allergic rhinitis patients was suggestively associated (P=0.0001). The genotype frequencies of eotaxin-3 +2497T>G in allergic rhinitis patients were suggestively different from those in non-allergic rhinitis controls (P=<0.0007). Our results strongly suggest that the SNP of eotaxin-3 might be associated with susceptibility to allergic rhinitis.
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Affiliation(s)
- Soo-Cheon Chae
- Genome Research Center for Immune Disorders, Wonkwang University School of Medicine, Iksan, Chonbuk, 570-749, Korea
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Chae SC, Park YR, Lee YC, Lee JH, Chung HT. The association of TIM-3 gene polymorphism with atopic disease in Korean population. Hum Immunol 2004; 65:1427-31. [PMID: 15603868 DOI: 10.1016/j.humimm.2004.07.002] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2004] [Revised: 07/07/2004] [Accepted: 07/08/2004] [Indexed: 11/27/2022]
Abstract
The family of T-cell immunoglobulin domain and mucin domain (TIM) proteins is identified to be expressed on T cells. A member of the TIM family, TIM-3 is selectively expressed on the surface of differentiated T helper 1 (Th1) cells. TIM-3 might have an important role in the induction of autoimmune diseases by regulating macrophage activation and interacts with the TIM-3 ligand to regulate Th1 responses. In the present study, we analyzed the association of the genotype and allele frequencies between asthma or allergic rhinitis patients and nonatopic controls using large samples size at -1516G > T, -574T > G, and 4259G > T polymorphic sites of the Tim-3 gene. The genotype and allele frequencies of -574T > G polymorphism in asthma patients (p = 0.042 and p = 0.017, respectively) as well as allergic rhinitis patients (p = 0.008 and p = 0.003, respectively) were significantly different from those of nonatopic controls. Furthermore, the allele frequency of 4259G > T polymorphism in allergic rhinitis patients (p = 0.029) was also significantly different. Our results strongly suggest that the -574T > G polymorphism of Tim-3 might be associated with the susceptibility of atopic diseases such as asthma and allergic rhinitis.
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MESH Headings
- Adult
- Alleles
- Asthma/genetics
- Asthma/immunology
- Base Sequence
- Case-Control Studies
- DNA, Complementary/genetics
- Female
- Gene Frequency
- Genotype
- Hepatitis A Virus Cellular Receptor 2
- Humans
- Hypersensitivity, Immediate/genetics
- Hypersensitivity, Immediate/immunology
- Korea
- Male
- Membrane Proteins/genetics
- Membrane Proteins/immunology
- Middle Aged
- Polymorphism, Single Nucleotide
- Receptors, Virus
- Rhinitis, Allergic, Perennial/genetics
- Rhinitis, Allergic, Perennial/immunology
- Rhinitis, Allergic, Seasonal/genetics
- Rhinitis, Allergic, Seasonal/immunology
- Th1 Cells/immunology
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Affiliation(s)
- Soo-Cheon Chae
- Genome Research Center for Immune Disorders, Wonkwang University School of Medicine, Iksan, Korea
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Chae SC, Park YR, Song JH, Shim SC, Yoon KS, Chung HT. The polymorphisms of Tim-1 promoter region are associated with rheumatoid arthritis in a Korean population. Immunogenetics 2004; 56:696-701. [PMID: 15565336 DOI: 10.1007/s00251-004-0743-5] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.9] [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: 04/06/2004] [Revised: 10/21/2004] [Indexed: 10/26/2022]
Abstract
It has been determined that the family of T-cell immunoglobulin domain and mucin domain (TIM) proteins is expressed on T cells. A member of the TIM family, TIM-1, is considered to be a membrane protein associated with the development of Th2-biased immune responses and selectively expressed on Th2 cells. We previously showed that the exon 4 variations of Tim-1 are associated with susceptibility to allergic diseases, as well as autoimmune diseases such as rheumatoid arthritis (RA). In this study, we assessed the association between genotype and allele frequencies of the Tim-1 gene promoter region, in both RA patients and the controls without RA, using polymerase chain reaction-restriction fragment length polymorphism and single-base extension methods. We further investigated the relationships among the genotypes of each polymorphism and C-reactive protein or rheumatoid factor levels in RA patients. The genotype and allele frequencies of the -1637A>G polymorphism in RA patients are significantly different from those in the non-RA controls (P=0.0004 and P=0.001, respectively). Our results strongly suggest that polymorphism in the Tim-1 promoter region might be associated with susceptibility to RA.
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Affiliation(s)
- Soo-Cheon Chae
- Genome Research Center for Immune Disorders, Wonkwang University School of Medicine, Iksan, Chonbuk, 570-749, Korea
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Chae SC, Lee YC, Park YR, Shin JS, Song JH, Oh GJ, Hong ST, Pae HO, Choi BM, Chung HT. Analysis of the polymorphisms in eotaxin gene family and their association with asthma, IgE, and eosinophil. Biochem Biophys Res Commun 2004; 320:131-7. [PMID: 15207712 DOI: 10.1016/j.bbrc.2004.05.136] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2004] [Indexed: 11/17/2022]
Abstract
The eotaxin gene family (eotaxin, eotaxin-2, and eotaxin-3) has been implicated in the recruitment of eosinophils, basophiles, and Th2 lymphocytes that is a central aspect of allergic diseases such as asthma. To determine whether the single nucleotide polymorphisms (SNPs) of eotaxin gene family are associated with susceptibility to asthma, we scanned 225 asthma patients and 294 non-asthmatic controls using the direct sequencing method. We further investigated the relationships among each SNP, eosinophils, and serum total IgE levels in asthma patients. Eleven SNPs were identified in the eotaxin gene family. We found that EoB179T > C (P = 0.0001), EoB275C > T (P = 0.018) of the eotaxin-2 and EoA2497T > G (P = 0.003) of the eotaxin-3 were significantly associated with the susceptibility of asthma. Furthermore, our data demonstrated for the first time that EoA2497T > G (P = 0.005) is related to serum total IgE level while EoA77C > T (P = 0.035) and EoA2497T > G (P = 0.033) are related to the peripheral blood eosinophil counts in asthma. Our results suggest that the polymorphisms of the eotaxin gene family are associated with the susceptibility of asthma and Eotaxin-3 might play the critical role for the recruitment of eosinophils and the maintenance of IgE levels.
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Affiliation(s)
- Soo-Cheon Chae
- Genome Research Center for Immune Disorders, Wonkwang University School of Medicine, Iksan, Chonbuk 570-749, Republic of Korea
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Han MK, Kim SJ, Park YR, Shin YM, Park HJ, Park KJ, Park KH, Kim HK, Jang SI, An NH, Kim UH. Antidiabetic effect of a prodrug of cysteine, L-2-oxothiazolidine-4-carboxylic acid, through CD38 dimerization and internalization. J Biol Chem 2002; 277:5315-21. [PMID: 11679582 DOI: 10.1074/jbc.m106439200] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.4] [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: 11/06/2022] Open
Abstract
CD38 is a bifunctional enzyme synthesizing (ADP-ribosyl cyclase) and degrading (cyclic ADP-ribose (cADPR) hydrolase) cADPR, a potent Ca(2+) mobilizer from intracellular pools. CD38 internalization has been proposed as a mechanism by which the ectoenzyme produced intracellular cADPR, and thiol compounds have been shown to induce the internalization of CD38. Here, we show that the disulfide bond between Cys-119 and Cys-201 in CD38 may be involved in CD38 dimerization and internalization. We tested the effect of a reducing agent, l-2-oxothiazolidine-4-carboxylic acid (OTC), a prodrug of cysteine, on CD38 internalization in pancreatic islets. OTC enhanced insulin release from isolated islets as well as CD38 internalization and cytoplasmic Ca(2+) level. Furthermore, islet cells treated with antisense CD38 oligonucleotide showed inhibition of OTC-induced insulin secretion. Intake of OTC in db/db mice ameliorated glucose tolerance, insulin secretion, and morphology of islets when compared with control mice. These data indicate that OTC improves glucose tolerance by enhancing insulin secretion via CD38/cADPR/Ca(2+) signaling machinery. Thus, OTC may represent a novel class of antidiabetic drug.
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Affiliation(s)
- Myung-Kwan Han
- Department of Biochemistry and Institute for Medical Sciences, Chonbuk National University Medical School, Chonju 561-182, Korea
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Park IK, Park YH, Shin BA, Choi ES, Kim YR, Akaike T, Cho CS, Park YK, Park YR. Galactosylated chitosan-graft-dextran as hepatocyte-targeting DNA carrier. J Control Release 2000; 69:97-108. [PMID: 11018549 DOI: 10.1016/s0168-3659(00)00298-4] [Citation(s) in RCA: 134] [Impact Index Per Article: 5.6] [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: 11/21/2022]
Abstract
Lactobionic acid bearing galactose group was coupled with chitosan for liver specificity, and dextran was grafted to galactosylated chitosan (GC) for stability in water. Compared to the GC/DNA complex, the stability of the galactosylated chitosan-graft-dextran (GCD)/DNA complex could be enhanced. The particle size of the GCD/DNA complexes decreased as the charge ratio of GCD to DNA increased. Conformational change of DNA did not occur after complex formation with GCD compared with the conformation of DNA itself. The GCD/DNA complexes were only transfected into Chang liver cells and that of Hep G2 having asialoglycoprotein receptors (ASGR), indicative of specific interaction of ASGRs on cells and galactose ligands on chitosan.
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Affiliation(s)
- I K Park
- School of Agricultural Biotechnology, Seoul National University, Suwon 441-744, South Korea
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Abstract
Chloroprocaine, 0.5 per cent, with physiologic saline solution, has a specific gravity of 1.007 and a osmolarity of 283 mOsm/l, which increase to a specific gravity of 1.025 and an osmolarity of 542 mOsm/l when chloroprocaine is prepared in dextrose, 5 per cent. Chloroprocaine, 2.7 per cent, shows similar increases in specific gravity and osmolarity with dextrose 5 per cent. The highest sensory anesthesia level attained in pregnant patients following epidural injection of 10 ml of each of these solutions was determined. Chloroprocaine in dextrose, 5 per cent, produced a significant lowering of the highest sensory anesthesia level attained, compared with solutions to which dextrose was not added.
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