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Liu Z, Lu F, Dong Y, Wang S, Zhao Y, Sun S, Pan H. Increased ambulatory arterial stiffness index correlated with monocyte chemoattractant protein-1 in prehypertensives. BRITISH HEART JOURNAL 2011. [DOI: 10.1136/heartjnl-2011-300867.692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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377
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Chen B, Xiong Z, Ma Y, Liu C, Dong Y. Adenosine monophosphate-activated protein kinase attenuates cardiomyocyte hypertrophy through regulation of FOXO3a/MAFbx signalling pathway. BRITISH HEART JOURNAL 2011. [DOI: 10.1136/heartjnl-2011-300867.13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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378
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Hoffmann AA, Montgomery BL, Popovici J, Iturbe-Ormaetxe I, Johnson PH, Muzzi F, Greenfield M, Durkan M, Leong YS, Dong Y, Cook H, Axford J, Callahan AG, Kenny N, Omodei C, McGraw EA, Ryan PA, Ritchie SA, Turelli M, O'Neill SL. Successful establishment of Wolbachia in Aedes populations to suppress dengue transmission. Nature 2011; 476:454-7. [PMID: 21866160 DOI: 10.1038/nature10356] [Citation(s) in RCA: 905] [Impact Index Per Article: 69.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2011] [Accepted: 07/06/2011] [Indexed: 01/26/2023]
Abstract
Genetic manipulations of insect populations for pest control have been advocated for some time, but there are few cases where manipulated individuals have been released in the field and no cases where they have successfully invaded target populations. Population transformation using the intracellular bacterium Wolbachia is particularly attractive because this maternally-inherited agent provides a powerful mechanism to invade natural populations through cytoplasmic incompatibility. When Wolbachia are introduced into mosquitoes, they interfere with pathogen transmission and influence key life history traits such as lifespan. Here we describe how the wMel Wolbachia infection, introduced into the dengue vector Aedes aegypti from Drosophila melanogaster, successfully invaded two natural A. aegypti populations in Australia, reaching near-fixation in a few months following releases of wMel-infected A. aegypti adults. Models with plausible parameter values indicate that Wolbachia-infected mosquitoes suffered relatively small fitness costs, leading to an unstable equilibrium frequency <30% that must be exceeded for invasion. These findings demonstrate that Wolbachia-based strategies can be deployed as a practical approach to dengue suppression with potential for area-wide implementation.
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379
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Shan Y, Zhang J, Liu Z, Wang M, Dong Y. Developments of combretastatin A-4 derivatives as anticancer agents. Curr Med Chem 2011; 18:523-38. [PMID: 21143124 DOI: 10.2174/092986711794480221] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2010] [Accepted: 12/20/2010] [Indexed: 11/22/2022]
Abstract
Tubulin protein is one of several members of a small family of globular proteins. It offers a potential target for anticancer drug design and development. Combretastatin A-4 (CA-4) is a potent anticancer and antiangiogenesis natural substance isolated from Combretum caffrum. Modifications on the CA-4 structure have led to a great number of novel CA-4 derivatives as potent tubulin inhibitors and high cytotoxic anticancer agents is becoming an interesting field, leading to a breakthrough in the treatment of cancer. In this review, the recent developments of novel CA-4 derivatives via the modifications on the A- and B-ring and the double bond as anticancer agents are discussed.
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380
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Wang X, Yang L, Li H, Zuo L, Liang S, Liu W, Dong Y, Yang S, Shang H, Li J, Kang L, Zhong P, Zheng W, Liao L, Xing H, Chen RY, Ruan Y, Shao Y. Factors associated with HIV virologic failure among patients on HAART for one year at three sentinel surveillance sites in China. Curr HIV Res 2011; 9:103-11. [PMID: 21361864 DOI: 10.2174/157016211795569122] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2010] [Accepted: 02/10/2011] [Indexed: 11/22/2022]
Abstract
BACKGROUND Emerging HIV drug resistance (HIVDR) poses a growing threat to the long-term success and durability of highly active antiretroviral therapy (HAART). OBJECTIVE To understand the incidence of HIVDR and estimate the proportion of potential HIVDR and its associated risk factors among the patients on HAART for one year. METHODS Antiretroviral-naïve patients ≥ 18 years old were invited to participate in this one-year prospective study from seven clinics in Yunnan, Guangxi, and Xinjiang provinces. A questionnaire and blood draw were collected at baseline and 12 month follow-up. The protocol used was modified slightly from the WHO Protocol for Surveys of HIV Drug Resistance Emerging During Treatment and Related Program Factors in Sentinel ART Sites in Resource-limited Settings. RESULTS 435 subjects were included in the final analysis, with median baseline CD4 cell count 139 cells/mm3. Of the total 417 patients who fall under WHO guidelines for 'Classification of outcomes based on endpoints' (on ART at 12 months, switch, lost to follow-up, and stop), 90 (21.6%) did not have any drug resistant mutations (potential HIVDR) and 17 (4.1%) did (HIVDR, Table 2). The remaining 310 (75.3%) had a viral load <1000 copies/ml (HIVDR prevention). Among 351 patients retained at 12 months, 41 (11.7%) had a viral load >1000 copies/ml.Patients who self-reported missing doses in the previous month were 6.2 fold (95% CI 2.5-15.7) more likely to fail than those who did not. and those from Xinjiang were 12.1 fold (95% CI 5.2-28.1) more likely to fail compared to those from Yunnan and Guangxi. Why Xinjiang was associated with virologic failure was not clear but may be related to the demographics of the participants from Xinjiang, being significantly more IDUs, poorer, and less adherent than those from Yunnan and Guangxi. CONCLUSIONS Although successful virologic outcomes were seen in the vast majority (75.3%) of those treated at one year, virologic failure continues to be a problem particularly among those less adherent and from Xinjiang. Additional data are needed to understand the generalizability of these results, particularly those related to Xinjiang. For IDUs, enhancing adherence to HAART and considering the treatment of drug addiction as an integral part of the treatment for HIV infection should be considered. As China's National Free Antiretroviral Treament Program continues to mature and improve, ramping up treatment in these settings may be important considerations to the long-term success of the program.
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Geng J, Wang M, Wang J, Wang L, Yang Z, Cheng Y, Qiao F, Wang M, Dong Y, Sui Y, He C, Gao L. PP-078 Genetic characteristics and pathogenicity of hepatitis E virus isolated from patients in eastern China, genotype 4 HEV can result in acute liver failure. Int J Infect Dis 2011. [DOI: 10.1016/s1201-9712(11)60230-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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382
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Liu Y, Delwiche SR, Dong Y. Feasibility of FT–Raman spectroscopy for rapid screening for DON toxin in ground wheat and barley. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2011; 26:1396-401. [PMID: 21462584 DOI: 10.1080/02652030903013310] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Rapid detection of deoxynivalenol (DON) in cereal-based food and feed has long been the goal of regulators and manufacturers. As non-destructive approaches, infrared (IR) and near-infrared (NIR) spectroscopic techniques have been used for the prediction and classification of contaminated single-kernel and ground grain without any DON extraction steps. These methods, however, are hindered by the intense and broad spectral bands attributed to naturally occurring moisture. Raman spectroscopy could be an alternative to IR and NIR due to its insensitivity to water and fewer overlapped bands. This study explored the feasibility of the Raman technique for rapid and non-destructive screening of DON-contaminated wheat and barley meal. The advantages of this technique include the use of a 1064-nm NIR excitation laser that reduces interference from fluorescence of biological compounds in wheat and barley, the use of a simple intensity-intensity algorithm at two unique frequencies, plus the technique's ease of sample preparation. The results indicate that the simple algorithm, as well as principal component analysis applied to the Raman spectra, can be used to classify low from high DON grain.
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Crespo M, Collado S, Mir M, Hurtado S, Cao H, Barbosa F, Serra C, Hidalgo C, Faura A, Garcia de Lomas J, Montero M, Horcajada JP, Puig JM, Pascual J, Ulusal Okyay G, Uludag K, Sozen H, Arman D, Dalgic A, Guz G, Fraile P, Garcia-Cosmes P, Rosado C, Gonzalez C, Tabernero JM, Costa C, Saldan A, Astegiano S, Terlizzi ME, Messina M, Bergallo M, Segoloni G, Cavallo R, Schwarz A, Grosshennig A, Heim A, Broecker V, Haller H, Linnenweber S, Liborio AB, Mendoza TR, Esmeraldo RM, Oliveira MLMB, Nogueira Paes FJV, Silva Junior GB, Daher EF, Hodgson K, Baharani J, Fenton A, Baharani J, Mjoen G, Hartmann A, Reisaeter A, Midtvedt K, Dahle DO, Holdaas H, Shabir S, Lukacik P, Bevins A, Basnayake K, Bental A, Hughes RG, Cockwell P, Burrows R, Hutchison CA, Varma P, Kumar A, Hooda A, Badwal S, Barrios C, Mir M, Crespo M, Fumado L, Frances A, Puig JM, Horcajada JP, Arango O, Pascual J, Pawlik A, Chudek J, Kolonko A, Wilk J, Jalowiecki P, Wiecek A, Teplan V, Kralova-Lesna I, Mahrova A, Racek J, tollova M, Maggisano V, Caracciolo V, Solazzo A, Montanari M, Della Grotta F, Nakazawa D, Nishio S, Nakagaki T, Ishikawa Y, Ito M, Shibazaki S, Shimoda N, Miura M, Morita K, Nonomura K, Koike T, Locsey L, Seres I, Sztanek F, Harangi M, Padra J, Asztalos L, Paragh G, Rodriguez-Reimundes E, Soler-Pujol G, Diaz CH, Davalos-Michel M, Vilches AR, Laham G, Mjoen G, Stavem K, Midtvedt K, Norby G, Holdaas H, Tutal E, Canver B, Can S, Sezer S, Colak T, Kolonko A, Chudek J, Wiecek A, Paschoalin R, Barros X, Duran C, Torregrosa JV, Crespo M, Mir M, Barrios C, Faura A, Tellez E, Marin M, Puig JM, Pascual J, Smalcelj R, Smalcelj A, Claes K, Petit T, Bammens B, Kuypers D, Naesens M, Vanrenterghem Y, Evenepoel P, Gerhart MK, Colbus S, Seiler S, Grun O, Fliser D, Heine GH, Vincenti F, Grinyo J, Larsen C, Medina Pestana J, Vanrenterghem Y, Dong Y, Thomas D, Charpentier B, Luna E, Martinez R, Cerezo I, Ferreira F, Cubero J, Villa J, Martinez C, Garcia C, Rodrigo E, Santos L, Pinera C, Quintela E, Ruiz JC, Fernandez-Fresnedo G, Palomar R, Gomez-Alamillo C, Martin de Francisco AL, Arias M, Grinyo J, Nainan G, del Carmen Rial M, Steinberg S, Vincenti F, Dong Y, Thomas D, Kamar N, Durrbach A, Grinyo J, Vanrenterghem Y, Becker T, Florman S, Lang P, del Carmen Rial M, Schnitzler M, Duan T, Block A, Medina Pestana J, Sawosz M, Cieciura T, Durlik M, Perkowska A, Sikora P, Beck B, De Mauri A, Brambilla M, Stratta P, Chiarinotti D, De Leo M, Attou S, Arzour H, Boudrifa N, Mekhlouf N, Gaouar A, Merazga S, Kalem K, Haddoum F. Transplantation: clinical studies. Clin Kidney J 2011. [DOI: 10.1093/ndtplus/4.s2.43] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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384
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Peiris KHS, Pumphrey MO, Dong Y, Dowell FE. Fusarium Head Blight Symptoms and Mycotoxin Levels in Single Kernels of Infected Wheat Spikes. Cereal Chem 2011. [DOI: 10.1094/cchem-08-10-0112] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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385
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Kinsey JS, Hays MD, Dong Y, Williams DC, Logan R. Chemical characterization of the fine particle emissions from commercial aircraft engines during the Aircraft Particle Emissions eXperiment (APEX) 1 to 3. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2011. [PMID: 21428391 DOI: 10.1016/j.atmosenv.2010.02.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
This paper addresses the need for detailed chemical information on the fine particulate matter (PM) generated by commercial aviation engines. The exhaust plumes of seven turbofan engine models were sampled as part of the three test campaigns of the Aircraft Particle Emissions eXperiment (APEX). In these experiments, continuous measurements of black carbon (BC) and particle surface-bound polycyclic aromatic compounds (PAHs) were conducted. In addition, time-integrated sampling was performed for bulk elemental composition, water-soluble ions, organic and elemental carbon (OC and EC), and trace semivolatile organic compounds (SVOCs). The continuous BC and PAH monitoring showed a characteristic U-shaped curve of the emission index (EI or mass of pollutant/mass of fuel burned) vs fuel flow for the turbofan engines tested. The time-integrated EIs for both elemental composition and water-soluble ions were heavily dominated by sulfur and SO(4)(2-), respectively, with a ∼2.4% median conversion of fuel S(IV) to particle S(VI). The corrected OC and EC emission indices obtained in this study ranged from 37 to 83 mg/kg and 21 to 275 mg/kg, respectively, with the EC/OC ratio ranging from ∼0.3 to 7 depending on engine type and test conditions. Finally, the particle SVOC EIs varied by as much as 2 orders of magnitude with distinct variations in chemical composition observed for different engine types and operating conditions.
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386
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Kinsey JS, Hays MD, Dong Y, Williams DC, Logan R. Chemical characterization of the fine particle emissions from commercial aircraft engines during the Aircraft Particle Emissions eXperiment (APEX) 1 to 3. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2011; 45:3415-21. [PMID: 21428391 DOI: 10.1021/es103880d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
This paper addresses the need for detailed chemical information on the fine particulate matter (PM) generated by commercial aviation engines. The exhaust plumes of seven turbofan engine models were sampled as part of the three test campaigns of the Aircraft Particle Emissions eXperiment (APEX). In these experiments, continuous measurements of black carbon (BC) and particle surface-bound polycyclic aromatic compounds (PAHs) were conducted. In addition, time-integrated sampling was performed for bulk elemental composition, water-soluble ions, organic and elemental carbon (OC and EC), and trace semivolatile organic compounds (SVOCs). The continuous BC and PAH monitoring showed a characteristic U-shaped curve of the emission index (EI or mass of pollutant/mass of fuel burned) vs fuel flow for the turbofan engines tested. The time-integrated EIs for both elemental composition and water-soluble ions were heavily dominated by sulfur and SO(4)(2-), respectively, with a ∼2.4% median conversion of fuel S(IV) to particle S(VI). The corrected OC and EC emission indices obtained in this study ranged from 37 to 83 mg/kg and 21 to 275 mg/kg, respectively, with the EC/OC ratio ranging from ∼0.3 to 7 depending on engine type and test conditions. Finally, the particle SVOC EIs varied by as much as 2 orders of magnitude with distinct variations in chemical composition observed for different engine types and operating conditions.
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387
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Xu J, Zhang GL, Cheng YQ, Chen B, Dong Y, Li LQ, Xu L, Xu XF, Lu ZP, Wen JF. Hypomethylation of the HTR1A promoter region and high expression of HTR1A in the peripheral blood lymphocytes of patients with systemic lupus erythematosus. Lupus 2011; 20:678-89. [DOI: 10.1177/0961203310394892] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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388
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Dong Y, Wu WKK, Wu CW, Sung JJY, Yu J, Ng SSM. MicroRNA dysregulation in colorectal cancer: a clinical perspective. Br J Cancer 2011. [PMID: 21364594 DOI: 10.1038/bjc] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Recent researches have shed light on the biological importance of microRNAs (miRNAs) in colorectal cancer (CRC) genesis, progression and response to treatments. The potential utility of miRNAs in the preclinical stage have been explored and investigated. In this review, we explored the literature and reviewed the cutting edge progress in the discovery of noninvasive plasma and faecal miRNAs for CRC early diagnosis, as well as their measurability and predictability. We also discussed the utility of miRNAs as novel prognostic and predictive markers, and their association with CRC clinical phenotypes including recurrence, metastasis and therapeutic outcomes. Finally, we summarised miRNA-related single-nucleotide polymorphisms and their potential influence on sporadic CRC susceptibility and therapeutic response. In conclusion, the use of miRNAs as biomarker for CRC is still in its infancy and need further characterisation and evaluation.
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389
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Li H, Liu Y, Huang H, Tang Y, Yang B, Huang C, Sung RJ, Lo CP, Hsiao PY, Tien HC, Hsiao PY, Lin YH, Lo CP, Tien HC, Sung RJ, Zhao Q, Huang C, Tang Y, Wang X, Okello E, Zhong Y, Liang J, Li H, Peng W, Wen L, Wang K, Tang K, Dong Y, Li W, Xu Y, Yang J. Cellular Electrophysiology. Europace 2011. [DOI: 10.1093/europace/euq480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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390
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Duru F, Poci D, Hartford M, Karlsson T, Caidahl K, Edvardsson N, Liu J, Fang PH, Liu Y, Li XF, Hou Y, Wang YS, Xiao-bin W, Shu-long Z, Dong C, Zhi-tao Z, Xian-jing W, Ying-xue D, Chen S, Dong Y, Yin Y, Zrenner B, Guo Y, Wang Y, Zhao Y, Gao W, Zhang L, Gao M. AF Outcomes. Europace 2011. [DOI: 10.1093/europace/euq474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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391
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Ferguson R, Grinyó J, Vincenti F, Kaufman DB, Woodle ES, Marder BA, Citterio F, Marks WH, Agarwal M, Wu D, Dong Y, Garg P. Immunosuppression with belatacept-based, corticosteroid-avoiding regimens in de novo kidney transplant recipients. Am J Transplant 2011; 11:66-76. [PMID: 21114656 DOI: 10.1111/j.1600-6143.2010.03338.x] [Citation(s) in RCA: 139] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Current immunosuppressive regimens in renal transplantation typically include calcineurin inhibitors (CNIs) and corticosteroids, both of which have toxicities that can impair recipient and allograft health. This 1-year, randomized, controlled, open-label, exploratory study assessed two belatacept-based regimens compared to a tacrolimus (TAC)-based, steroid-avoiding regimen. Recipients of living and deceased donor renal allografts were randomized 1:1:1 to receive belatacept-mycophenolate mofetil (MMF), belatacept-sirolimus (SRL), or TAC-MMF. All patients received induction with 4 doses of Thymoglobulin (6 mg/kg maximum) and an associated short course of corticosteroids. Eighty-nine patients were randomized and transplanted. Acute rejection occurred in 4, 1 and 1 patient in the belatacept-MMF, belatacept-SRL and TAC-MMF groups, respectively, by Month 6; most acute rejection occurred in the first 3 months. More than two-thirds of patients in the belatacept groups remained on CNI- and steroid-free regimens at 12 months and the calculated glomerular filtration rate was 8-10 mL/min higher with either belatacept regimen than with TAC-MMF. Overall safety was comparable between groups. In conclusion, primary immunosuppression with belatacept may enable the simultaneous avoidance of both CNIs and corticosteroids in recipients of living and deceased standard criteria donor kidneys, with acceptable rates of acute rejection and improved renal function relative to a TAC-based regimen.
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392
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Zhang S, Wang Y, Qiu S, Dong Y, Xu Y, Jiang D, Fu X, Zhang J, He J, Jia L, Wang L, Zhang C, Sun Y, Song H. Multilocus outbreak of foodborne botulism linked to contaminated sausage in Hebei province, China. Clin Infect Dis 2010; 51:322-5. [PMID: 20569065 DOI: 10.1086/653945] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
In 2007, an outbreak of foodborne botulism occurred in Hebei province, China. An epidemiological investigation and laboratory detection studies showed that sausage contaminated by type A Clostridium botulinum caused this outbreak of food poisoning. Its clinical and epidemiological features were different from previous reports of food poisoning.
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393
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Peiris KHS, Pumphrey MO, Dong Y, Maghirang EB, Berzonsky W, Dowell FE. Near-Infrared Spectroscopic Method for Identification ofFusariumHead Blight Damage and Prediction of Deoxynivalenol in Single Wheat Kernels. Cereal Chem 2010. [DOI: 10.1094/cchem-01-10-0006] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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394
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Dong Y, Li X, Bell T, Sammons R, Dong H. Surface microstructure and antibacterial property of an active-screen plasma alloyed austenitic stainless steel surface with Cu and N. Biomed Mater 2010; 5:054105. [DOI: 10.1088/1748-6041/5/5/054105] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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395
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Dong Y, Sui L, Yamaguchi F, Kamitori K, Hirata Y, Hossain MA, Suzuki A, Holley MC, Tokuda M. Phosphatase and tensin homolog deleted on chromosome 10 regulates sensory cell proliferation and differentiation of hair bundles in the mammalian cochlea. Neuroscience 2010; 170:1304-13. [PMID: 20727948 DOI: 10.1016/j.neuroscience.2010.08.024] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2010] [Revised: 08/05/2010] [Accepted: 08/12/2010] [Indexed: 01/16/2023]
Abstract
Phosphatase and tensin homolog deleted on chromosome 10 (PTEN) is a tumor suppressor gene that regulates cell proliferation, differentiation and growth. It regulates neural and glioma stem/progenitor cell renewal and PTEN deletion can drive expansion of epithelial progenitors in the lung, enhancing their capacity for regeneration. Because it is expressed at relatively high levels in developing mammalian auditory hair cells we have analyzed the phenotype of the auditory epithelium in PTEN knock-out mice. PTEN(+/-) heterozygous littermates have only one functional copy of the gene and show clear evidence for haploinsufficiency in the organ of Corti. Auditory sensory epithelial progenitors withdraw from the cell cycle later than in wild-type animals and this is associated with increases in the numbers of both inner and outer hair cells. The cytoskeletal differentiation of hair cells was also affected. While many hair bundles on the hair cells appeared to develop normally, others were structurally disorganized and a number were missing, apparently lost after they had been formed. The results show that PTEN plays a novel role in regulating cell proliferation and differentiation of hair bundles in auditory sensory epithelial cells and suggest that PTEN signaling pathways may provide therapeutic targets for auditory sensory regeneration.
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396
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Mihalas S, Dong Y, von der Heydt R, Niebur E. Mechanisms of perceptual organization provide auto-zoom and auto-localization for attention to objects. J Vis 2010. [DOI: 10.1167/10.7.979] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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397
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Scisco J, Muth E, Hoover A, Dong Y, Hill L, Wiles M, Harris S. An environmental cue to eat slowly reduces food consumption. Appetite 2010. [DOI: 10.1016/j.appet.2010.04.182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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398
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Dong Y, Li B. Dimension reduction for non-elliptically distributed predictors: second-order methods. Biometrika 2010. [DOI: 10.1093/biomet/asq016] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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399
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Zhu Z, He J, Jia X, Jiang J, Bai R, Yu X, Lv L, Fan R, He X, Geng J, You R, Dong Y, Qiao D, Lee KB, Smith GW, Dong C. MicroRNA-25 functions in regulation of pigmentation by targeting the transcription factor MITF in Alpaca (Lama pacos) skin melanocytes. Domest Anim Endocrinol 2010; 38:200-9. [PMID: 20036482 DOI: 10.1016/j.domaniend.2009.10.004] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2009] [Revised: 09/25/2009] [Accepted: 10/21/2009] [Indexed: 11/20/2022]
Abstract
Although the influence of endocrine factors is well established, the molecular and cellular mechanisms controlling coat color are not completely understood. A major mechanism for post-transcriptional regulation of gene expression is through the action of microRNAs (miRNAs), which anneal to the 3' untranslated region of mRNAs in a sequence-specific fashion and either block translation or promote transcript degradation. In this study, we investigated the expression of miRNAs in the skin of alpacas with brown vs white coat color using a microarray screen; identified potential mRNA targets for identified miRNAs among coat color genes; and subsequently determined the ability of a specific, differentially expressed miRNA (miR-25) to suppress expression of micropthalmia-associated transcription factor (MITF), a predicted miR-25 target gene that regulates genes linked to coat color. Expression of 10 different miRNA species in the skin of alpacas with brown vs white coat color was identified from microarray screens. Of the 10 alpaca skin miRNAs identified, predicted binding sites in the 3' untranslated region of RNAs encoding for known genes linked to coat color were primarily for miR-25, but sites were also identified for miR-129 and miR-377. Potential miR-25 binding sites were present in transcripts encoding for 11 coat color genes, including MITF. An inverse relationship between transcript abundance for MITF and miR-25 was observed in skin samples collected from alpacas with white vs brown coat color. Furthermore, overexpression of miR-25 in cultured melanocytes reduced MITF mRNA and protein abundance and corresponding mRNA abundance for the MITF-regulated enzymes tyrosinase and tyrosinase-related protein 1. Results support a novel functional role for miRNA-25 in the regulation of gene expression linked to coat color.
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400
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Dong Y, Han T, DeSouza G. Illumination invariant foreground detection using multi-subspace learning. INTERNATIONAL JOURNAL OF KNOWLEDGE-BASED AND INTELLIGENT ENGINEERING SYSTEMS 2010. [DOI: 10.3233/kes-2010-0188] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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