Time filter

Source Type

Huang W.-S.,Chang Gung University | Yang J.-T.,Chang Gung University | Lu C.-C.,Chang Gung University | Chang S.-F.,Chang Gung Memorial Hospital Chiayi Branch | And 3 more authors.
International Journal of Molecular Sciences | Year: 2015

A high level of serum resistin has recently been found in patients with a number of cancers, including colorectal cancer (CRC). Hence, resistin may play a role in CRC development. Fulvic acid (FA), a class of humic substances, possesses pharmacological properties. However, the effect of FA on cancer pathophysiology remains unclear. The aim of this study was to investigate the effect of resistin on the endothelial adhesion of CRC and to determine whether FA elicits an antagonistic mechanism to neutralize this resistin effect. Human HCT-116 (p53-negative) and SW-48 (p53-positive) CRC cells and human umbilical vein endothelial cells (HUVECs) were used in the experiments. Treatment of both HCT-116 and SW-48 cells with resistin increases the adhesion of both cells to HUVECs. This result indicated that p53 may not regulate this resistin effect. A mechanistic study in HCT-116 cells further showed that this resistin effect occurs via the activation of NF-κB and the expression of intercellular adhesion molecule-1 (ICAM-1) and vascular cell adhesion molecule-1 (VCAM-1). Co-treating cells with both FA and resistin revealed that FA significantly attenuated the resistin-increased NF-κB activation and ICAM-1/VCAM-1 expression and the consequent adhesion of HCT-116 cells to HUVECs. These results demonstrate the role of resistin in promoting HCT-116 cell adhesion to HUVECs and indicate that FA might be a potential candidate for the inhibition of the endothelial adhesion of CRC in response to resistin. © 2015 by the authors; licensee MDPI, Basel, Switzerland. Source

Chang S.-F.,Chang Gung Memorial Hospital Chiayi Branch | Hsieh R.-Z.,Chang Gung Memorial Hospital Chiayi Branch | Huang K.-C.,Chang Gung Memorial Hospital Chiayi Branch | Chang C.A.,National Yang Ming University | And 6 more authors.
PLoS ONE | Year: 2015

Bone morphogenetic proteins (BMPs) play positive roles in cartilage development, but they can barely be detected in healthy articular cartilage. However, recent evidence has indicated that BMPs could be detected in osteoarthritic and damaged cartilage and their precise roles have not been well defined. Extremely high amounts of leptin have been reported in obese individuals, which can be associated with osteoarthritis (OA) development. The aim of this study was to investigate whether BMPs could be induced in human primary chondrocytes during leptin-stimulated OA development and the underlying mechanism. We found that expression of BMP-2 mRNA, but not BMP-4, BMP-6, or BMP-7 mRNA, could be increased in human primary chondrocytes under leptin stimulation. Moreover, this BMP-2 induction was mediated through transcription factor-signal transducer and activator of transcription (STAT) 3 activation via JAK2-ERK1/2-induced Ser727-phosphorylation. Of note, histone deacetylases (HDACs) 3 and 4 were both involved in modulating leptin-induced BMP-2 mRNA expression through different pathways: HDAC3, but not HDAC4, associated with STAT3 to form a complex. Our results further demonstrated that the role of BMP-2 induction under leptin stimulation is to increase collagen II expression. The findings in this study provide new insights into the regulatory mechanism of BMP-2 induction in leptin-stimulated chondrocytes and suggest that BMP-2 may play a reparative role in regulating leptin-induced OA development. © 2015 Chang et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Source

Chan H.-L.,Linkou Chang Gung Memorial Hospital | Hsieh Y.-H.,Linkou Chang Gung Memorial Hospital | Lin C.-F.,Linkou Chang Gung Memorial Hospital | Lin C.-F.,Chung Shan Medical University | And 6 more authors.
Medicine (United States) | Year: 2015

To our knowledge, no prior population-based study has been published wherein the primary aim was to evaluate whether an association between psychotropic drug prescription and cervical cancer exists. Herein we have conducted the first study that primarily aimed to determine the association between antidepressants use and risk of invasive cervical cancer in the general population. This is a population-based study utilizing Taiwans National Health Insurance Research Database. We identified 26,262 cases with invasive cervical cancer and 129,490 controls. We adopted the conditional logistic regression model as the statistical method and adjusted for potential confounding factors. The prescription of selective serotonin reuptake inhibitors (SSRIs) (adjusted OR0.93, 95% CI0.841.04), tricyclic antidepressants (TCAs), monoamine oxidase inhibitors (MAOIs), serotonin norepinephrine reuptake inhibitors (SNRIs), mirtazapine and bupropion, adjusting for cumulative dose, was not associated with an increased, or decreased, risk for invasive cervical cancer. An association between trazodone prescription and invasive cervical cancer was observed (adjusted OR1.22, 95% CI1.031.43). An association between the major classes of antidepressants and invasive cervical cancer was not observed herein. Our preliminary finding regarding a possible association between trazodone and cervical cancer requires replication. © 2015 Wolters Kluwer Health, Inc. All rights reserved. Source

Kuo H.-C.,Kaohsiung Chang Gung Memorial Hospital | Kuo H.-C.,Chang Gung University | Onouchi Y.,RIKEN | Hsu Y.-W.,Kaohsiung Medical University | And 12 more authors.
Journal of Human Genetics | Year: 2011

Kawasaki disease (KD) is a systemic vasculitis associated with cardiovascular symptom. A previous study in the European descent has indicated that genetic variants of the transforming growth factor-Β (TGF-Β) pathway are involved in the KD susceptibility and clinical status. This study was conducted to investigate if polymorphisms in TGF-Β signaling pathway are associated with KD susceptibility, and the coronary artery lesion formation. A total of 950 subjects (381 KD patients and 569 controls) were investigated to identify 12 single-nucleotide polymorphisms in the TGF-Β signaling pathway (rs2796817, rs10482751, rs2027567, rs12029576, rs11466480, rs4776338, rs12901071, rs7162912, rs1438386, rs6494633, rs12910698 and rs4776339) by using TaqMan Allelic Discrimination assay. Our results indicated that rs1438386 in the SMAD3 is significantly associated with the susceptibility of KD. Additionally, both haplotypes of TGFΒ2 and SMAD3 were also associated with the risk of KD. This study showed that genetic polymorphisms in TGF-Β signaling pathway are associated with KD susceptibility, but not coronary artery lesions formation, or intravenous immunoglobulin treatment response in the Taiwanese population. © 2011 The Japan Society of Human Genetics All rights reserved. Source

Li J.-J.,National Yang Ming University | Lan K.-L.,National Yang Ming University | Lan K.-L.,Taipei Veterans General Hospital | Chang S.-F.,Chang Gung Memorial Hospital Chiayi Branch | And 12 more authors.
Bioconjugate Chemistry | Year: 2015

The design, preparation, as well as structural and functional characterizations of the recombinant fusion protein hVEGF-EGF as a dual-functional agent that may target both EGFR (R: receptor) and angiogenesis are reported. hVEGF-EGF was found to bind to EGFR more strongly than did EGF, and to bind to VEGFR similarly to VEGF. Mass spectrometry measurements showed that the sites of DTPA (diethylenetriaminepentaacetic acid) conjugated hVEGF-EGF (for radiolabeling) were the same as those of its parent hEGF and hVEGF proteins. All DTPA-conjugated proteins retained similar binding capacities to their respective receptors as compared to their respective parent proteins. In vitro cell binding studies using BAEC (a bovine aortic endothelial cell) and MDA-MB-231 (a human breast cancer) cells expressing both EGFR and VEGFR confirmed similar results. Treating BAEC cells with hVEGF-EGF induced remarkable phosphorylation of EGFR, VEGFR, and their downstream targets ERK1/2. Nevertheless, the radiolabeled 111In-DTPA-hVEGF-EGF showed cytotoxicity against MDA-MB-231 cells. Pharmacokinetic studies using 111In-DTPA-hVEGF-EGF in BALB/c nude mice showed that appreciable tracer activities were accumulated in liver and spleen. In all, this study demonstrated that the fusion protein hVEGF-EGF maintained the biological specificity toward both EGFR and VEGFR and may be a potential candidate as a dual-targeting moiety in developing anticancer drugs. © 2015 American Chemical Society. Source

Discover hidden collaborations