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Zhang H, Pu J, Qi T, Qi M, Yang C, Li S, Huang K, Zheng L, Tong Q. MicroRNA-145 inhibits the growth, invasion, metastasis and angiogenesis of neuroblastoma cells through targeting hypoxia-inducible factor 2 alpha. Oncogene 2012; 33:387-97. [PMID: 23222716 DOI: 10.1038/onc.2012.574] [Citation(s) in RCA: 117] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2012] [Revised: 10/01/2012] [Accepted: 10/23/2012] [Indexed: 11/10/2022]
Abstract
Recent evidence shows that hypoxia-inducible factor 2 alpha (HIF-2α) may have critical roles in the growth and progression of neuroblastoma (NB) under non-hypoxic conditions. However, the underlying mechanisms and clinical potentials of normoxic HIF-2α expression in NB still remain largely unknown. In this study, HIF-2α immunostaining was identified in 26/42 NB tissues, which was correlated with clinicopathological features. In subtotal 20 NB cases, microRNA-145 (miR-145) was downregulated and inversely correlated with HIF-2α expression. Bioinformatics analysis revealed a putative miR-145 binding site in the 3'-untranslated region (3'-UTR) of HIF-2α messenger RNA (mRNA). Overexpression or knockdown of miR-145 responsively altered both the mRNA and protein levels of HIF-2α and its downstream genes, cyclin D1, matrix metalloproteinase 14 and vascular endothelial growth factor, in normoxically cultured NB cell lines SH-SY5Y and SK-N-SH. In a luciferase reporter system, miR-145 downregulated the luciferase activity of HIF-2α 3'-UTR, and these effects were abolished by a mutation in the putative miR-145-binding site. Overexpression of miR-145 suppressed the growth, invasion, metastasis and angiogenesis of SH-SY5Y and SK-N-SH cells in vitro and in vivo, while restoration of HIF-2α expression rescued the tumor cells from miR-145-mediated defects in these biological features. Furthermore, anti-miR-145 inhibitor rescued the HIF-2α knockdown-mediated repression on the growth, migration, invasion and angiogenesis of NB cells. These data indicate that miR-145 suppresses HIF-2α expression via the binding site in the 3'-UTR under normoxic conditions, thus inhibiting the aggressiveness and angiogenesis of NB.
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Huang K, Dahele M, Senan S, Guckenberger M, Rodrigues G, Ward A, Boldt R, Palma D. Radiographic Changes After Lung Stereotactic Ablative Radiation Therapy (SABR) - Can We Distinguish Fibrosis From Recurrence? A Systematic Review of the Literature. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.1477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Wu RH, Lin R, Li H, Xiao ZW, Rao HB, Luo WH, Guo G, Huang K, Zhang XG, Lang ZJ. Accuracy of noninvasive quantification of brain NAA concentrations using PRESS sequence: verification in a swine model with external standard. CONFERENCE PROCEEDINGS : ... ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL CONFERENCE 2012; 2005:1396-9. [PMID: 17282459 DOI: 10.1109/iembs.2005.1616690] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The metabolite ratios had been employed in the field of MR spectroscopy (MRS) for a long period. The main drawback of metabolite ratio is that ratio results are not comparable with absolute metabolite concentration in vivo. The purpose of this study was to examine the accuracy of noninvasive quantification of brain N-acetylaspartate (NAA) concentrations using previously reported MR external standard method. Eight swine were scanned on a GE 1.5 T scanner with a standard head coil. The external standard method was utilized with a sphere filled with NAA, GABA, glutamine, glutamate, creatine, choline chloride, and myo-inositol. The position resolved spectroscopy (PRESS) sequence was used with TE=135 msec, TR=1500 msec, and 128 scan averages. The analysis of MRS was done with SAGE/IDL program. In vivo NAA concentration was obtained using the equation S=N * e(-TE/T<sub>2</sub>) * [1-e(-TR/T<sub>1</sub>). In vitro NAA concentration was measured by high performance liquid chromatography (HPLC). In the MRS group, the mean concentration of NAA was 10.03 plusmn 0.74 mmol/kg. In the HPLC group, the mean concentration of NAA was 9.22 plusmn 0.55 mmol/kg. There was no significant difference between the two groups (p = 0.46). However, slightly higher value was observed in the MRS group (7/8 swine), compared with HPLC group. The range of differences was between 0.02~2.05 mmol/kg. MRS external reference method could be more accurate than internal reference method. <sup>1</sup>H MRS does not distinguish between N-acetyl resonance frequencies and other N-acetylated amino acids.
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Huang K, Li SQ, Wang WJ, Liu LS, Jiang YG, Feng PN, Wang YQ, Wang SM. Oral FTY720 administration induces immune tolerance and inhibits early development of atherosclerosis in apolipoprotein E-deficient mice. Int J Immunopathol Pharmacol 2012; 25:397-406. [PMID: 22697071 DOI: 10.1177/039463201202500209] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Orally administered immunomodulatory drugs have recently demonstrated the ability to induce an oral tolerance via inhibition of effector T cells and induction of certain subsets of regulatory T cells (Tregs) which have the potential to prevent several autoimmune diseases. In the present study, we hypothesized that short-term, low-dose, oral FTY720 administration may induce latency-associated peptide (LAP) Tregs and CD4(+) Foxp3(+) Tregs in atherogenesis, potentially resulting in remission of early development of atherosclerosis in apolipoprotein E-deficient (APOE(-/-)) mice. FTY720 was orally administered to APOE(-/-) mice 4 weeks of age on a high-cholesterol diet and atherosclerosis was assessed at 8 weeks of age. Oral administration of FTY720 significantly reduced atherosclerotic lesion formation compared with control mice. We observed a significant increase in LAP(+) and Foxp3(+) cells in the CD4+T-cell population of FTY720-treated mice in association with increased production of the anti-inflammatory cytokine transforming growth factor-β (TGF-β) as well as suppressed T-helper type 1 immune responses. Our findings reveal that short-term, low-dose oral FTY720 treatment had great benefits in inhibiting early development of atherosclerosis in mice via induction of a regulatory T-cell response and inhibition of effector T responses. These findings suggest that oral immune modulation may represent an attractive therapeutic approach to atherosclerosis.
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Huang C, Huang R, Chang W, Jiang T, Huang K, Cao J, Sun X, Qiu Z. The expression and clinical significance of pSTAT3, VEGF and VEGF-C in pancreatic adenocarcinoma. Neoplasma 2012; 59:52-61. [PMID: 22082308 DOI: 10.4149/neo_2012_007] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Signal transducers and activators of transcription 3 (STAT3) is a central cytoplasmic transcription factor and regulates a number of pathways important in tumorigenesis including cell cycle progression, apoptosis, tumor angiogenesis, invasion and metastasis.This study aims to investigate the expression of pSTAT3, VEGF and VEGF-C in pancreatic adenocarcinoma and their relations to the clinicopathological features, tumor angiogenesis and prognosis. In the present study, the expression of pSTAT3, VEGF and VEGF-C and microvascular density (MVD) were examined via immunohistochemistry. The clinicopathological information was collected and patients were regularly followed up. The relationship between the parameters and the clinicopathological features were analyzed, and the univariate and multivariate prognostic factors were also analyzed. The expression of pSTAT3 in tumor tissues was significantly higher in contrast to that in normal tissues, and pSTAT3 was related to VEGF and VEGF-C expression, MVD, tumor size, lymphogenous status and TNM staging (P<0.05). Survival analysis suggested that tumor size, TNM staging, pSTAT3 and VEGF expression were risk factors of prognosis, but no independent factors were found. We concluded that pSTAT3, which was a risk factor of prognosis, was abnormally expressed in pancreatic adenocarcinoma and related to tumor size, TNM staging and lymphatic metastasis. pSTAT3 may promote tumor angiogenesis via up-regulating VEGF on protein and even gene levels, and enhance the early lymphatic metastasis through VEGF-C. Better understanding of STAT3 signaling pathways in angiogenesis may contribute to the development of novel therapeutic strategies in angiogenesis and metastasis of pancreatic cancer.
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Yang W, Wallace R, Huang K, Cook R, Fraass B. SU-E-T-363: Sensitivity of ArcCheck to Delivery Errors in IMRT/VMAT Treatment. Med Phys 2012. [DOI: 10.1118/1.4735450] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Huang K, Huang C, Shan K, Chen J, Li H. Significance of PC cell-derived growth factor and cyclin D1 expression in cutaneous squamous cell carcinoma. Clin Exp Dermatol 2012; 37:411-7. [PMID: 22420613 DOI: 10.1111/j.1365-2230.2011.04275.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND PC cell-derived growth factor (PCDGF) is an autocrine growth factor originally purified from the highly tumorigenic teratoma PC cell line. It participates in tumorigenesis and tumour progression through upregulation of cyclin D1. To date, there has been no report on the role of PCDGF in skin cancer, to our knowledge. AIM To investigate the expression of PCDGF and cyclin D1 in basal cell carcinoma (BCC), squamous cell carcinoma (SCC) and seborrhoeic keratosis (SK), and their relationship with the clinicopathological parameters of SCC. METHODS Immunohistochemical expression of PCDGF and cyclin D1 was examined in 42 SCC, 30 BCC and 20 SK tissues. RESULTS PCDGF and cyclin D1 were overexpressed in SCC or BCC tissues compared with normal skin or SK, and their expressions were significantly higher in SCC than in BCC. Moreover, positive expression of PCDGF and cyclin D1 was significantly correlated with depth of invasion and metastasis of SCC. There was significant correlation between PCDGF and cyclin D1 expression in SCC. CONCLUSIONS Expression of PCDGF and cyclin D1 plays an important role in the tumorigenesis of BCC and SCC. Abnormal expression of PCDGF and Cyclin D1 may be related to invasion and metastasis of SCC.
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Schuchardt F, Drexl J, Huang K, Schroeder L, Strecker C, Lambeck J, Markl M, Hennemuth A, Harloff A. Charakterisierung des zerebralen venösen Blutflusses mittels Fluss-sensitiver 4D MRT. KLIN NEUROPHYSIOL 2012. [DOI: 10.1055/s-0032-1301447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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235
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Mao JY, Chen LM, Ge XL, Zhang L, Yan WC, Li DZ, Liao GQ, Ma JL, Huang K, Li YT, Lu X, Dong QL, Wei ZY, Sheng ZM, Zhang J. Spectrally peaked electron beams produced via surface guiding and acceleration in femtosecond laser-solid interactions. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2012; 85:025401. [PMID: 22463272 DOI: 10.1103/physreve.85.025401] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2011] [Revised: 01/04/2012] [Indexed: 05/31/2023]
Abstract
Highly collimated MeV electron beam guiding has been observed along the target surface following the interaction of bulk target irradiation by femtosecond laser pulses at relativistic intensities. The beam quality is shown to depend critically on the laser contrast: With a ns prepulse, the generated electron beam is well concentrated and intense, while a high laser contrast produces divergent electron beams. In the case of large preplasma scale lengths, tunable guiding and acceleration of the target surface electrons is achieved by changing the laser incident angle. By expanding the preplasma scale length to several hundred micrometers, we obtained MeV spectrum-peaked electron beams with a 100 pC per laser pulse and divergence angles of only 3°. This technique suggests a stable method of injection of elections into a variety of accelerator designs.
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Han J, Lun W, Meng Z, Huang K, Mao Y, Zhu W, Lian S. Mucocutaneous manifestations of HIV-infected patients in the era of HAART in Guangxi Zhuang Autonomous Region, China. J Eur Acad Dermatol Venereol 2012; 27:376-82. [DOI: 10.1111/j.1468-3083.2011.04429.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Hsieh C, Huang K, Lu J, Barry M, Kovoor P. A Novel Technique of Multi-point Pacing in Substrate Evaluation Using Conduction Velocity with Non-contact Mapping. Heart Lung Circ 2012. [DOI: 10.1016/j.hlc.2012.05.274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Liu X, Cao X, Wei R, Cai Y, Li H, Gui J, Zhong D, Liu XY, Huang K. Gene-viro-therapy targeting liver cancer by a dual-regulated oncolytic adenoviral vector harboring IL-24 and TRAIL. Cancer Gene Ther 2011; 19:49-57. [PMID: 21979578 DOI: 10.1038/cgt.2011.67] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Cancer-targeting gene-viro-therapy is a promising cancer therapeutic strategy that strengthens the antitumor effect of oncolytic viruses by expressing an inserted foreign antitumor gene. To achieve liver cancer targeting and to improve the safety of the ZD55 vector (a widely-used E1B55KD gene-deleted oncolytic adenoviral vector (OV), we previously constructed), we designed a novel OV named Ad·AFP·D55 that selectively replicates in hepatocellular carcinoma (HCC) cells by replacing the E1A promoter with the liver-cancer specific α-Fetoprotein (AFP) promoter based on the ZD55 vector. We found that the oncolytic adenoviruses Ad·AFP·D55-IL-24 and Ad·AFP·D55-TRAIL express tumor-suppressor gene interleukin-24 (IL-24) and tumor necrosis factor-related apoptosis-inducing ligand (TRAIL), respectively, significantly suppressed the HCC cell growth in vitro by inducing apoptosis by the caspase-8 and mitochondria-dependent caspase-9 signaling pathways. Furthermore, the combined treatment of Ad·AFP·D55-IL-24 and Ad·AFP·D55-TRAIL showed strong antitumor effects in vivo by significantly inhibiting the tumor growth in HCC HuH-7 cell xenograft mice, and markedly increasing animal survival rate. Therefore, this novel HCC cell-targeting OV carrying tumor-suppressor genes may provide a promising approach for liver cancer gene therapy.
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Dasgupta T, Shugard E, Weinberg V, Kased N, Huang K, Glastonbury C, Orloff L, Clark O, Yom S, Quivey J. Retrospective Outcome Analysis of High-Risk Thyroid Cancer treated with High Dose Intensity Modulated Radiation Therapy (IMRT) at a Single Institution. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Huang K, Rodrigues G, Scott D, McGregor D, Gaede S, Yartsev S, Bauman G, Louie A, Palma D. Inter and Intrafraction Uncertainty in Prostate Bed Image-Guided Radiotherapy. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.1466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Shi H, Xu W, Luo Y, Chen L, Liang Z, Zhou X, Huang K. The effect of various environmental factors on the ethidium monazite and quantitative PCR method to detect viable bacteria. J Appl Microbiol 2011; 111:1194-204. [DOI: 10.1111/j.1365-2672.2011.05125.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Fang C, Meng Q, Wu H, Eid G, Zhang G, Zhang X, Yang S, Huang K, Lee TH, Corrigan CJ, Ying S. Resistin-like molecule-β is a human airway remodelling mediator. Eur Respir J 2011; 39:458-66. [PMID: 21828035 DOI: 10.1183/09031936.00107811] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Though implicated in vascular remodelling, a role for the resistin-like molecule (RELM)-β in human airway remodelling remains unexplored. We hypothesised that RELM-β expression is increased in the airways of asthmatics and regulates airways epithelial cell function. Expression of RELM-β in the bronchial mucosa and its concentrations in bronchoalveolar lavage (BAL) fluid from asthmatics and controls were measured by immunohistochemistry and ELISA, respectively. Proliferation assays, Western blotting, ELISA and real-time PCR were employed to detect effects of RELM-β on airways epithelial cells. RELM-β expression was increased in the bronchial mucosa and BAL fluid of asthmatics compared with controls. In the asthmatics, the numbers of mucosal RELM-β+ cells correlated inversely with forced expiratory volume in 1 s (r=-0.531, p=0.016), while the numbers of epithelial RELM-β+ cells correlated positively with those of mucin (MUC)5AC+ cells. In vitro, interleukin-13 enhanced RELM-β expression by primary human airways epithelial cells, while RELM-β itself acted on these cells to induce proliferation, expression of MUC5AC, extracellular signal-regulated kinase (ERK)/mitogen-activated protein kinase (MAPK)-phosphatidylinositol 3-kinase (PI3K)/Akt phosphorylation and elevated expression of transforming growth factor-β2, epidermal growth factor and vascular endothelial growth factor. RELM-β has the potential to contribute to airway remodelling in diseases such as asthma by acting on epithelial cells to increase proliferation, mucin and growth factor production, at least partly via ERK/MAPK-PI3K/Akt signalling pathways.
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Tao R, Huang K. Reducing blood viscosity with magnetic fields. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2011; 84:011905. [PMID: 21867211 DOI: 10.1103/physreve.84.011905] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2011] [Revised: 05/15/2011] [Indexed: 05/31/2023]
Abstract
Blood viscosity is a major factor in heart disease. When blood viscosity increases, it damages blood vessels and increases the risk of heart attacks. Currently, the only method of treatment is to take drugs such as aspirin, which has, however, several unwanted side effects. Here we report our finding that blood viscosity can be reduced with magnetic fields of 1 T or above in the blood flow direction. One magnetic field pulse of 1.3 T lasting ~1 min can reduce the blood viscosity by 20%-30%. After the exposure, in the absence of magnetic field, the blood viscosity slowly moves up, but takes a couple of hours to return to the original value. The process is repeatable. Reapplying the magnetic field reduces the blood viscosity again. By selecting the magnetic field strength and duration, we can keep the blood viscosity within the normal range. In addition, such viscosity reduction does not affect the red blood cells' normal function. This technology has much potential for physical therapy.
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Jiang Z, Naughton J, Holupka E, Huang K, Chin S. SU-E-T-269: Study IMRT Dosimetry Uncertainty Factors by Simulation. Med Phys 2011. [DOI: 10.1118/1.3612220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Shu L, Baumbach RE, Janoschek M, Gonzales E, Huang K, Sayles TA, Paglione J, O'Brien J, Hamlin JJ, Zocco DA, Ho PC, McElroy CA, Maple MB. Correlated electron state in Ce(1-x)Yb(x)CoIn5 stabilized by cooperative valence fluctuations. PHYSICAL REVIEW LETTERS 2011; 106:156403. [PMID: 21568584 DOI: 10.1103/physrevlett.106.156403] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2010] [Indexed: 05/30/2023]
Abstract
X-ray diffraction, electrical resistivity, magnetic susceptibility, and specific heat measurements on Ce(1-x)Yb(x)CoIn5 (0≤x≤1) reveal that many of the characteristic features of the x=0 correlated electron state are stable for x≤0.775 and that phase separation occurs for x>0.775. The stability of the correlated electron state is apparently due to cooperative behavior of the Ce and Yb ions, involving their unstable valences. Low-temperature non-Fermi liquid behavior is observed and varies with x, even though there is no readily identifiable quantum critical point. The superconducting critical temperature T(c) decreases linearly with x towards 0 K as x→1, in contrast with other HF superconductors where T(c) scales with T(coh).
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Buzurovic I, Huang K, Yu Y, Podder TK. A robotic approach to 4D real-time tumor tracking for radiotherapy. Phys Med Biol 2011; 56:1299-318. [DOI: 10.1088/0031-9155/56/5/005] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Hsieh C, Chia E, Huang K, Lu J, Pouliopoulos J, Barry T, Thomas S, Kovoor P. Evolution of an early ablation of post-myocardial infarct ventricular tachycardia in an ovine model. Heart Lung Circ 2011. [DOI: 10.1016/j.hlc.2011.05.236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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