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Liu X, Liu Z, Chen R, Chen X, Bao Q, Wang Z, Jia C. 0855 Nightmares Predict Future Non-suicidal Self-injury In Adolescents: SABHC Cohort Study. Sleep 2018. [DOI: 10.1093/sleep/zsy061.854] [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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Zhang L, Yang Y, Liu Z, Luo Y, Jia C, Liu X. 0856 Daytime Sleepiness Mediates The Associations Between Sleep Problems And Academic Achievement In Chinese Adolescents. Sleep 2018. [DOI: 10.1093/sleep/zsy061.855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Gerber S, Yang SL, Zhu D, Soifer H, Sobota JA, Rebec S, Lee JJ, Jia T, Moritz B, Jia C, Gauthier A, Li Y, Leuenberger D, Zhang Y, Chaix L, Li W, Jang H, Lee JS, Yi M, Dakovski GL, Song S, Glownia JM, Nelson S, Kim KW, Chuang YD, Hussain Z, Moore RG, Devereaux TP, Lee WS, Kirchmann PS, Shen ZX. Femtosecond electron-phonon lock-in by photoemission and x-ray free-electron laser. Science 2018; 357:71-75. [PMID: 28684521 DOI: 10.1126/science.aak9946] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Accepted: 05/03/2017] [Indexed: 11/02/2022]
Abstract
The interactions that lead to the emergence of superconductivity in iron-based materials remain a subject of debate. It has been suggested that electron-electron correlations enhance electron-phonon coupling in iron selenide (FeSe) and related pnictides, but direct experimental verification has been lacking. Here we show that the electron-phonon coupling strength in FeSe can be quantified by combining two time-domain experiments into a "coherent lock-in" measurement in the terahertz regime. X-ray diffraction tracks the light-induced femtosecond coherent lattice motion at a single phonon frequency, and photoemission monitors the subsequent coherent changes in the electronic band structure. Comparison with theory reveals a strong enhancement of the coupling strength in FeSe owing to correlation effects. Given that the electron-phonon coupling affects superconductivity exponentially, this enhancement highlights the importance of the cooperative interplay between electron-electron and electron-phonon interactions.
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Jia C, Mei F, Liu JY, Zhao HM, Lei YT, Su J, Huang SS, Zheng J, You JF. [Histologic classification and prognosis factors in phyllodes tumors of breast]. ZHONGHUA BING LI XUE ZA ZHI = CHINESE JOURNAL OF PATHOLOGY 2017; 46:14-19. [PMID: 28072970 DOI: 10.3760/cma.j.issn.0529-5807.2017.01.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To study the relationship between morphological characteristics, grading, diagnosis and prognosis in phyllodes tumors (PT) of the breast. Methods: A retrospective study was carried out on 83 PTs diagnosed between 1999 and 2003 that were classified semi-quantitatively according to the WHO recommendation. Follow-up data was available for some cases, and Cox regression analysis was used to evaluate factors affecting metastasis and recurrence. Results: All cases were classified into the benign (57.8%), borderline (28.9%) and malignant (13.3%). The overall recurrence rate for the 72 cases with follow-up data was 20.8% (15/72), and was 17.5% (7/40) in benign, 22.7% (5/22) in borderline and 3/10 in malignant PT, respectively, with no significant difference (P>0.05). The median interval between the initial diagnosis and the first recurrence was 24 months. Lung or bone metastases occurred in 1/22 borderline and 3/10 malignant PT patients 5 years post-surgery. The mitotic count and the degree of stromal cell atypia were significantly correlated with recurrence (P=0.001 and P=0.006). Multivariate analysis showed that severe stromal cell atypia was an independent predictor of recurrence-free survival in PT [HR=6.40 (95% CI=1.378 to 29.732), P=0.018]. Conclusions: Each parameter in the histological grading of PT may have different prognostic value, and markedly increased mitotic count and were predictive of relapse.
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Wang L, Mou Y, Meng D, Sun Y, Chen X, Yang X, Jia C, Song X, Li X. MicroRNA-203 inhibits tumour growth and metastasis through PDPN. Clin Otolaryngol 2016; 42:620-628. [PMID: 27775879 DOI: 10.1111/coa.12785] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/16/2016] [Indexed: 12/11/2022]
Abstract
OBJECTIVE MicroRNAs play an important role in regulating hypopharyngeal cancer development. miR-203 has been previously shown to possess antitumour capabilities in many cancers, but not in hypopharyngeal cancer. DESIGN Using human normal and hypopharyngeal cancer specimens, we explored the expression levels of miR-203 in the two groups and further correlated them with different stages of cancer and lymph node metastasis. SETTING AND PARTICIPANTS Applying human pharynx FaDu cancer cells and lentiviral transduction technique, we investigated the effects of miR-203 on cancer cell viability, migration and invasion. Moreover, we studied the novel relationship between miR-203 and podoplanin (PDPN) in hypopharyngeal cancer. RESULTS The downregulated levels of miR-203 in human hypopharyngeal cancer tissues were associated with advanced cancer stages and lymph node metastasis. High levels of miR-203 inhibited cell viability, migration and invasion of hypopharyngeal cancer cells. Further studies suggested miR-203 directly targeted and inhibited PDPN expression. PDPN silencing suppresses hypopharyngeal cancer cell abilities. In addition, PDPN overexpression was able to reverse miR-203 inhibitory effects on cell viability, migration and invasion. CONCLUSION PDPN acts as an oncogene to promote hypopharyngeal cancer cell viability, migration and invasion. miR-203 directly targets PDPN to suppress its expression, thus exerting inhibitory effects on cancer metastasis.
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Fu X, Xu M, Jia C, Xie W, Wang L, Kong D, Wang H. Differential regulation of skin fibroblasts for their TGF-β1-dependent wound healing activities by biomimetic nanofibers. J Mater Chem B 2016; 4:5246-5255. [DOI: 10.1039/c6tb00882h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nanofibers with different compositions differentially regulate fibroblast phenotypes in a TGF-β1 rich milieu through the integrin-mediated TGF-β1/Smad signaling pathway.
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Jia C, Han M, Wang X. Association between Self-Esteem, Anxiety and Rural Attempted Suicide in Shandong, China. Int J Epidemiol 2015. [DOI: 10.1093/ije/dyv096.302] [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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Broxterman RM, Craig JC, Smith JR, Wilcox SL, Jia C, Warren S, Barstow TJ. Influence of blood flow occlusion on the development of peripheral and central fatigue during small muscle mass handgrip exercise. J Physiol 2015; 593:4043-54. [PMID: 26104881 DOI: 10.1113/jp270424] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Accepted: 06/18/2015] [Indexed: 11/08/2022] Open
Abstract
Critical power represents an important threshold for neuromuscular fatigue development and may, therefore, dictate intensities for which exercise tolerance is determined by the magnitude of fatigue accrued. Peripheral fatigue appears to be constant across O2 delivery conditions for large muscle mass exercise, but this consistency is equivocal for smaller muscle mass exercise. We sought to determine the influence of blood flow occlusion during handgrip exercise on neuromuscular fatigue development and to examine the relationship between neuromuscular fatigue development and W '. Blood flow occlusion influenced the development of both peripheral and central fatigue, thus providing further evidence that the magnitude of peripheral fatigue is not constant across O2 delivery conditions for small muscle mass exercise. W ' appears to be related to the magnitude of fatigue accrued during exercise, which may explain the reported consistency of intramuscular metabolic perturbations and work performed for severe-intensity exercise. The influence of the muscle metabolic milieu on peripheral and central fatigue is currently unclear. Moreover, the relationships between peripheral and central fatigue and the curvature constant (W ') have not been investigated. Six men (age: 25 ± 4 years, body mass: 82 ± 10 kg, height: 179 ± 4 cm) completed four constant power handgrip tests to exhaustion under conditions of control exercise (Con), blood flow occlusion exercise (Occ), Con with 5 min post-exercise blood flow occlusion (Con + Occ), and Occ with 5 min post-exercise blood flow occlusion (Occ + Occ). Neuromuscular fatigue measurements and W ' were obtained for each subject. Each trial resulted in significant peripheral and central fatigue. Significantly greater peripheral (79.7 ± 5.1% vs. 22.7 ± 6.0%) and central (42.6 ± 3.9% vs. 4.9 ± 2.0%) fatigue occurred for Occ than for Con. In addition, significantly greater peripheral (83.0 ± 4.2% vs. 69.0 ± 6.2%) and central (65.5 ± 14.6% vs. 18.6 ± 4.1%) fatigue occurred for Occ + Occ than for Con + Occ. W ' was significantly related to the magnitude of global (r = 0.91) and peripheral (r = 0.83) fatigue. The current findings demonstrate that blood flow occlusion exacerbated the development of both peripheral and central fatigue and that post-exercise blood flow occlusion prevented the recovery of both peripheral and central fatigue. Moreover, the current findings suggest that W ' may be determined by the magnitude of fatigue accrued during exercise.
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Key Words
- %Sat-[Hb + Mb], %Saturation-[haemoglobin + myoglobin]
- CP, critical power
- Con, control exercise
- Con + Occ, control exercise with 5 min post-exercise blood flow occlusion
- EMG, electromyography
- LED, light-emitting diodes
- MVC, maximal voluntary contraction
- MedPF, median power frequency
- NIRS, near infrared spectroscopy
- Occ, blood flow occlusion exercise
- Occ + Occ, blood flow occlusion exercise with 5 min post-exercise blood flow occlusion
- P, power
- PCr, phosphocreatine
- Pi, inorganic phosphate
- Ppeak, peak power
- Qtw, potentiated doublet force
- R, resistance
- Tlim, task failure
- VA, voluntary activation
- W ′, curvature constant
- d, displacement
- deoxy-[Hb + Mb], deoxygenated-[haemoglobin + myoglobin]
- f, contraction frequency
- iEMG, intergrated electromyography
- oxy-[Hb + Mb], oxygenated-[haemoglobin + myoglobin]
- total-[Hb + Mb], total-[haemoglobin + myoglobin]
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Liu T, Peng YF, Jia C, Yang BH, Tao X, Fang X, Zhong W. Effect of HGF on the apoptosis of rat corpus cavernosum smooth muscle cells induced by TGFβ1. Andrologia 2014; 47:1020-7. [PMID: 25385280 DOI: 10.1111/and.12372] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/05/2014] [Indexed: 11/27/2022] Open
Abstract
Corpus cavernosum smooth muscle cells (CCSMCs) are important functional cells for penile erection. We evaluated the effect of transforming growth factor β1 (TGFβ1) and hepatocyte growth factor (HGF) on the viability and apoptosis of CCSMCs in vitro. CCSMCs from healthy male Sprague Dawley rats were randomly divided into four groups: a negative control group, a TGFβ1 group, a HGF group and a HGF+ TGFβ1 group. Differences in cell viability and apoptosis among groups were observed by 3-[4,5-dimethylthiazol-2-yl]-2,5 diphenyl tetrazolium bromide (MTT) assay and flow cytometry. Western blot was used to detect the change of apoptosis-related proteins. The level of reactive oxygen species (ROS) was detected by colorimetry. In the TGFβ1 group, the MTT values were obviously decreased at 12 h, 24 h, 48 h-0.320, 0.383 and 0.432 respectively. However, compared with the normal group, the apoptosis index was markedly increased, reaching 26.86% at the 48-h time point. After TGFβ1 treatment, the levels of cleaved caspase-3 and p-Smad2 were increased in the cells, but the levels of Bcl-xL, Bcl-2 and p-Akt were significantly lower. However, HGF co-treatment partially reversed these changes and could decrease the intracellular ROS level while increasing the Akt phosphorylation level. These results indicate that TGFβ1 might induce apoptosis of CCSMCs in vitro and that HGF could interfere with the above process through downregulation of apoptosis signalling and oxidative stress reaction.
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Zhou Y, Liu T, Kang P, Jia C. Association of better iron status biomarkers and coronary artery disease risk. Intern Med J 2014; 44:846-50. [DOI: 10.1111/imj.12508] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2013] [Accepted: 05/25/2014] [Indexed: 11/29/2022]
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Jia C, Yoshimura N, Liao L. Herpes simplex virus vector-mediated gene transfer of kynurenine aminotransferase improves detrusor overactivity in spinal cord-injured rats. Gene Ther 2014; 21:484-9. [PMID: 24598891 DOI: 10.1038/gt.2014.19] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2013] [Revised: 12/11/2013] [Accepted: 01/20/2014] [Indexed: 01/07/2023]
Abstract
Detrusor overactivity threatens the renal function of patients with spinal cord injury. Suppressing N-methyl-D-aspartate receptors is known to improve detrusor overactivity in rats with spinal cord injury, whereas kynurenic acid, the endogenous antagonist of N-methyl-D-aspartate receptors, is irreversibly synthesized by kynurenine aminotransferases (KATs). In this study, we investigated whether replication-defective herpes simplex virus vector-mediated gene transfer of human KAT II could treat detrusor overactivity by injecting the vectors into the rat bladder wall 1 week after spinal cord injury. Three weeks after injection, we evaluated the cystometry and gene expression of KAT II in L6-S1 dorsal root ganglia. The results showed that the vectors are transported to L6-S1 dorsal root ganglia and upregulate the expression of KAT II, and that they also improve the detrusor overactivity and voiding efficiency. We also proved that N-methyl-D-aspartate receptors were blocked by kynurenic acid in the extracellular solution or the vector-mediated gene transfer of KAT II in cultured rat neurons of L6-S1 dorsal root ganglia by whole-cell patch clamp to explore the mechanisms of gene therapy. Therefore, replication-defective herpes simplex virus vector-mediated KAT II inhibits detrusor overactivity in spinal cord-injured rats, possibly by suppressing N-methyl-D-aspartate receptors in bladder afferent pathways.
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Wang K, Long Q, Jia C, Liu Y, Yi X, Yang H, Fei Z, Liu W. Over-expression of Mash1 improves the GABAergic differentiation of bone marrow mesenchymal stem cells in vitro. Brain Res Bull 2013; 99:84-94. [PMID: 24144723 DOI: 10.1016/j.brainresbull.2013.10.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Revised: 10/08/2013] [Accepted: 10/10/2013] [Indexed: 01/11/2023]
Abstract
Bone marrow mesenchymal stem cells (BMSCs) have been shown to be a promising cell type for the study of neuronal differentiation; however, few attempts had been made to differentiate these cells into inhibitory gamma-aminobutyric acid (GABA)ergic neurons. In this study, we over-expressed mammalian achaete-scute homologue-1 (Mash1), a basic helix-loop-helix (bHLH) transcription factor, in Sprague-Dawley rat BMSCs via lentiviral vectors, and then induced neuronal differentiation of these cells using conditioned medium. Our Western blot results show that, under conditions of differentiation, Mash1-overexpressing BMSCs exhibit an increased expression of neuronal markers and a greater degree of neuronal morphology compared to control, non-Mash1-overexpressing cells. Using immunocytochemistry, we observed increased expression of glutamic acid decarboxylase 67 (GAD67), as well as neuron-specific nuclear protein (NeuN) and β3-tubulin, in Mash1-overexpressing BMSCs compared to control cells. Moreover, we also found the differentiated cells showed representative traces of action potentials in electrophysiological characterization. In conclusion, our study demonstrated that over-expression of Mash1 can improve GABAergic differentiation of BMSCs in vitro.
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Chen Z, Zhang Y, Jia C, Wang Y, Lai P, Zhou X, Wang Y, Song Q, Lin J, Ren Z, Gao Q, Zhao Z, Zheng H, Wan Z, Gao T, Zhao A, Dai Y, Bai X. mTORC1/2 targeted by n-3 polyunsaturated fatty acids in the prevention of mammary tumorigenesis and tumor progression. Oncogene 2013; 33:4548-57. [PMID: 24096482 DOI: 10.1038/onc.2013.402] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2013] [Revised: 07/21/2013] [Accepted: 08/23/2013] [Indexed: 12/17/2022]
Abstract
Although epidemiological and preclinical studies have shown the preventative effects of n-3 polyunsaturated fatty acids (PUFAs) on breast cancer, inconsistencies still remain in the data and the underlying mechanisms remain unclear. In this study, we identified mammalian target of rapamycin (mTOR) signaling, which plays an essential role in cell proliferation and breast tumorigenesis, as a target of n-3 PUFAs. In breast cancer cell lines, n-3 PUFAs rapidly and efficiently suppress both mTOR complex 1 (mTORC1) and mTORC2 and their downstream signaling, and subsequently inhibit cell proliferation and angiogenesis while promoting apoptosis. Further study indicates that stabilization of the mTOR-raptor complex by n-3 PUFAs may contribute to their inhibitory effect on mTORC1. Importantly, four complementary and well-controlled animal models were utilized to identify the role and molecular target of n-3 PUFAs in the prevention of breast carcinogenesis and progression, namely: (1) chemically induced mammary tumor rats with a high dietary intake of n-3 PUFAs; (2) nude mice implanted with mammary tumor cell lines stably expressing fat-1, a desaturase that catalyzes the conversion of n-6 to n-3 PUFAs and produces n-3 PUFAs endogenously; (3) fat-1 transgenic severe combined immune deficiency mice implanted with breast tumor cells; and (4) the fat-1 transgenic mouse mammary tumor virus-polyoma virus middle T oncogene double-hybrid mice, a model of aggressive breast cancer. In summary, dietary and endogenous n-3 PUFAs abrogate the activity of mTORC1/2 pathways in vitro and in vivo and prevent breast carcinogenesis, tumor growth and metastasis. Taken together, our findings convincingly clarify the causal relationship between n-3 PUFAs and breast cancer prevention and establish mTORC1/2 as a target of n-3 PUFAs.
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Zhang XH, Jia C, Chen YQ, Su Y, Zhou HY. A Mixed Solvothermal Route to Synthesis of Dice-Like PbS. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200800182] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Fenaux P, Kantarjian H, Muus P, Lyons R, Larson R, Sekeres M, Becker P, Jia C, Yang A. P-180 Final report of an open-label extension (OLE) study of romiplostim in MDS with a focus on patients with prolonged treatment. Leuk Res 2013. [DOI: 10.1016/s0145-2126(13)70228-5] [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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Jia C, Liao LM, Chen G, Sui Y. Detrusor botulinum toxin A injection significantly decreased urinary tract infection in patients with traumatic spinal cord injury. Spinal Cord 2013; 51:487-90. [PMID: 23357928 DOI: 10.1038/sc.2012.180] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
STUDY DESIGN The study was designed as a single-arm clinical trial. OBJECTIVES To investigate the effect of detrusor botulinum toxin A (BoNTA) injection on urinary tract infection (UTI) in patients with spinal cord injury (SCI). SETTING The study was performed in a national rehabilitation research center of China. METHODS Between September 2010 and May 2012, 41 male inpatients with neurogenic detrusor overactivity (NDO) caused by traumatic SCI, mean age 36.0±8.8 years, duration of SCI since inclusion 21.5±17.3 months, received an injection of 300 U BoNTA into detrusor. Before and 3 months after injection, each patient kept a bladder diary, underwent video-urodynamic investigation and urine culture. All UTIs occurring in the 6 months before and the 6 months after injection were recorded. RESULTS Before injection, the mean number of UTI over 6 months was 1.39±1.36. After injection, the mean significantly decreased to 0.78±0.96 (P=0.023). The mean maximum detrusor pressure during filling decreased significantly in the patients of detrusor overactivity (n=24) compared with patients of normo-active detrusor (n=17) after injection (35.4±12.2 vs 20.9±7.9 cmH(2)O, P=0.000), meantime, the decrease of UTI was significant in the former (1.29±1.21 vs 0.41±0.62 cmH(2)O, P=0.015) while no significant in the latter (1.46±1.47 vs 1.04±1.08, P=0.319). CONCLUSION Detrusor BoNTA injection significantly decreased UTI in SCI patients with NDO. This effect seems to be related to the decrease of detrusor pressure.
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Batterman S, Chin JY, Jia C, Godwin C, Parker E, Robins T, Max P, Lewis T. Sources, concentrations, and risks of naphthalene in indoor and outdoor air. INDOOR AIR 2012; 22:266-78. [PMID: 22145682 PMCID: PMC3307957 DOI: 10.1111/j.1600-0668.2011.00760.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
UNLABELLED Naphthalene is a ubiquitous pollutant, and very high concentrations are sometimes encountered indoors when this chemical is used as a pest repellent or deodorant. This study describes the distribution and sources of vapor-phase naphthalene concentrations in four communities in southeast Michigan, USA. Outdoors, naphthalene was measured in the communities and at a near-road site. Indoors, naphthalene levels were characterized in 288 suburban and urban homes. The median outdoor concentration was 0.15 μg/m(3), and a modest contribution from rush-hour traffic was noted. The median indoor long-term concentration was 0.89 μg/m(3), but concentrations were extremely skewed and 14% of homes exceeded 3 μg/m(3), the chronic reference concentration for non-cancer effects, 8% exceeded 10 μg/m(3), and levels reached 200 μg/m(3). The typical excess individual lifetime cancer risk was about 10(-4) and reached 10(-2) in some homes. Important sources include naphthalene's use as a pest repellent and deodorant, migration from attached garages and, to lesser extents, cigarette smoke and vehicle emissions. Excessive use as a repellent caused the highest concentrations. Naphthalene presents high risks in a subset of homes, and policies and actions to reduce exposures, for example, sales bans or restrictions, improved labeling, and consumer education, should be considered. PRACTICAL IMPLICATIONS Long-term average concentrations of naphthalene in most homes fell into the 0.2-1.7 μg/m(3) range reported as representative in earlier studies. The highly skewed distribution of concentrations results in a subset of homes with elevated concentrations and health risks that greatly exceed US EPA and World Health Organization (WHO) guidelines. The most important indoor source is the use of naphthalene as a pest repellant or deodorant; secondary sources include presence of an attached garage, cigarette smoking, and outdoor sources. House-to-house variation was large, reflecting differences among the residences and naphthalene use practices. Stronger policies and educational efforts are needed to eliminate or modify indoor usage practices of this chemical.
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Zhuangl LX, Xu SF, D'Adamo CR, Jia C, He J, Han DX, Lao LX. An effectiveness study comparing acupuncture, physiotherapy, and their combination in poststroke rehabilitation: a multicentered, randomized, controlled clinical trial. Altern Ther Health Med 2012; 18:8-14. [PMID: 22875557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
CONTEXT Stroke is a leading cause of death and disability worldwide, being the third leading cause of death in the United States and the second and third most common causes of death in Chinese cities and rural areas, respectively. Evaluation of different rehabilitative modalities appears necessary to optimize treatment. OBJECTIVES To compare acupuncture and physiotherapy for effectiveness and reliability in treating hemiplegic patients after stroke. DESIGN The research team designed a multicentered, three-arm, randomized controlled trial. Power calculations revealed a targeted sample size of 310 participants. SETTING The study took place at seven in-patient hospitals in China. PARTICIPANTS The research team screened a total of 310 patients. Of that number, 274 completed the study, 15 did not meet the inclusion/exclusion criteria, and 21 dropped out. Adverse events were rare (less than 1%), mild, and temporary. INTERVENTION The research team randomly divided participants into three groups that all received conventional care as needed-including psychological counseling, standard nursing care, and daily medical evaluation plus (1) acupuncture, (2) physiotherapy, or (3) acupuncture plus physiotherapy. The participants received treatments once a day, 6 days a week for 4 weeks. OUTCOME MEASURES The research team evaluated all patients at baseline, after 2 weeks, and after 4 weeks using the Fugl-Meyer Assessment of Physical Performance (FMA), a modified Barthel Index (BI), and the Neurologic Defect Scale (NDS). RESULTS No significant differences existed between the three groups at baseline. Compared to baseline, participants in all groups improved their FMA, BI, and NDS scores by the end of week 2 (P≤.05) and further improved by the end of week 4 (P≤.05) The study found no statistically significant differences in outcomes between the three groups after treatment (P>.05). CONCLUSION Acupuncture plus conventional care was similar in effectiveness to physiotherapy treatment plus conventional care for poststroke rehabilitation. The study found no synergistic effects for the combination of acupuncture and physiotherapy in addition to conventional care; that combination of treatments was no more effective than either treatment by itself. The effectiveness and lack of adverse events associated with acupuncture in this study suggest that it may represent an additional treatment option for stroke patients.
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Hnilova M, Liu X, Yuca E, Jia C, Wilson B, Karatas AY, Gresswell C, Ohuchi F, Kitamura K, Tamerler C. Multifunctional protein-enabled patterning on arrayed ferroelectric materials. ACS APPLIED MATERIALS & INTERFACES 2012; 4:1865-71. [PMID: 22458431 DOI: 10.1021/am300177t] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
This study demonstrates a biological route to programming well-defined protein-inorganic interfaces with an arrayed geometry via modular peptide tag technology. To illustrate this concept, we designed a model multifunctional fusion protein, which simultaneously displays a maltose-binding protein (MBP), a green fluorescence protein (GFPuv) and an inorganic-binding peptide (AgBP2C). The fused combinatorially selected AgBP2C tag controls and site-directs the multifunctional fusion protein to immobilize on silver nanoparticle arrays that are fabricated on specific domain surfaces of ferroelectric LiNbO(3) via photochemical deposition and in situ synthesis. Our combined peptide-assisted biological and ferroelectric lithography approach offers modular design and versatility in tailoring surface reactivity for fabrication of nanoscale devices in environmentally benign conditions.
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Jia C, Huang J, Kershaw S, Luo G, Farabegoli E, Perri MC, Chen L, Bai X, Xie S. Microbial response to limited nutrients in shallow water immediately after the end-Permian mass extinction. GEOBIOLOGY 2012; 10:60-71. [PMID: 22168223 DOI: 10.1111/j.1472-4669.2011.00310.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Previous work indicates that a variety of microbes bloomed in the oceans after the end-Permian faunal mass extinction, but evidence is sporadically documented. Thus, the nature and geographic distribution of such microbes and their associations are unclear, addressed in this study using a series of biomarker groups. On the basis of microbial biomarker records of the 2-methylhopane index, evidence is presented for cyanobacterial blooms in both the western and eastern Tethys Sea and in both shallow and deep waters, after the mass extinction. The enhanced relative abundance of C(28) (expressed by the C(28) /C(29) ratio of) regular steranes suggests a bloom of prasinophyte algae occurred immediately after the end-Permian faunal extinction, comparable with those observed in some other mass extinctions in Phanerozoic. Significantly, cyanobacteria and prasinophyte algae show a synchronized onset of bloom in the shallow water Bulla section, north Italy, inferring for the first time their coupled response to the biotic crisis and the associated environmental conditions. However, in Meishan of Zhejiang Province in south China, the bloom declined earlier than in Bulla. The association of increased 2-methylhopane index with a negative shift in the nitrogen isotope composition infers a scenario of enhanced nitrogen fixation by cyanobacteria immediately after the faunal mass extinction. N(2) fixation by cyanobacteria is here interpreted to have provided prasinophyte algae with ammonium in nutrient-limited shallow waters, and thus caused their associated blooms.
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Xu W, Huang M, Zhang Y, Yi X, Dong W, Gao X, Jia C. Novel surface display system for heterogonous proteins on Lactobacillus plantarum. Lett Appl Microbiol 2011; 53:641-8. [PMID: 21967414 DOI: 10.1111/j.1472-765x.2011.03160.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
AIMS To establish a novel cell surface display system that would enable the display of target proteins on Lactobacillus plantarum. METHODS AND RESULTS BlastP analysis of the amino acids sequence data revealed that the N-terminus of the putative muropeptidase MurO from L. plantarum contained two putative lysin motif (LysM) repeat regions, implying that the MurO was involved in bacterial cell wall binding. To investigate the potential of MurO for surface display, green fluorescent protein (GFP) was fused to MurO at its C-terminus and the resulting fusion protein was expressed in Escherichia coli. After being mixed with L. plantarum cells in vitro, GFP was successfully displayed on the surfaces of L. plantarum cells. Increases in the fluorescence intensities of chemically pretreated L. plantarum cells compared to those of nonpretreated cells suggested that the peptidoglycan was the binding ligand for MurO. SDS sensitivity assay showed that the GFP fluorescence intensity was reduced after being treated with SDS. To demonstrate the applicability of the MurO-mediated surface display system, β-galactosidase from Bifidobacterium bifidium, in place of GFP, was functionally displayed on the surface of L. plantarum cells via MurO. CONCLUSIONS The MurO was a novel anchor protein for constructing a surface display system for L. plantarum. SIGNIFICANCE AND IMPACT OF STUDY The success in surface display of GFP and β-galactosidase opened up the feasibility of employing the cell wall anchor of MurO for surface display in L. plantarum.
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Fenaux P, Kantarjian H, Lyons R, Larson R, Sekeres M, Becker P, Muus P, Jia C, Yang A. 215 Update of open-label extension study evaluating the long-term safety and efficacy of romiplostim in thrombocytopenic patients with myelodysplastic syndromes (MDS). Leuk Res 2011. [DOI: 10.1016/s0145-2126(11)70217-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Tian C, Fang S, Du X, Jia C. Association of the C47T polymorphism in SOD2 with diabetes mellitus and diabetic microvascular complications: a meta-analysis. Diabetologia 2011; 54:803-11. [PMID: 21181397 DOI: 10.1007/s00125-010-2004-5] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2010] [Accepted: 11/12/2010] [Indexed: 01/01/2023]
Abstract
AIMS/HYPOTHESIS A meta-analysis was performed to assess the association of C47T (rs4880) (also called Val16Ala) polymorphism in SOD2 gene with reduced risk of diabetes mellitus, including type 1 and type 2 diabetes, and diabetic microvascular complications (DMI) including diabetic nephropathy, diabetic retinopathy and diabetic polyneuropathy. METHODS A comprehensive search was conducted to identify all case-control or cohort design studies of the above-mentioned associations. The fixed or random effect pooled measure was selected on the basis of homogeneity test among studies. Heterogeneity among studies was evaluated using the I (2). Meta-regression and the 'leave one out' sensitive analysis of Patsopoulos et al. were used to explore potential sources of between-study heterogeneity. Publication bias was estimated using modified Egger's linear regression test as proposed by Harbord et al. RESULTS Seventeen articles were included. After excluding articles that deviated from Hardy-Weinberg equilibrium in cases and/or in controls, and were also the key contributors to between-study heterogeneity, the meta-analysis showed a significant association of the C allele with reduced risk of DMI in dominant (OR 0.788, 95% CI 0.680-0.914), recessive (OR 0.808, 95% CI 0.685-0.953) and codominant (OR 0.828, 95% CI 0.751-0.913) models. It also showed a significant association with reduced risk of diabetic nephropathy in the dominant model (OR 0.801, 95% CI 0.664-0.967), and reduced risk of diabetic retinopathy in the dominant (OR 0.601, 95% CI 0.423-0.855), recessive (OR 0.548, 95% CI 0.369-0.814) and codominant (OR 0.651, 95% CI 0.517-0.820) models. CONCLUSIONS/INTERPRETATION The meta-analysis suggested that C allele of C47T polymorphism in SOD2 gene has protective effects on risk of DMI, diabetic nephropathy and diabetic retinopathy. This risk needs to be confirmed by further studies.
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Jia C, Cussen AR, Hegg CC. ATP differentially upregulates fibroblast growth factor 2 and transforming growth factor α in neonatal and adult mice: effect on neuroproliferation. Neuroscience 2010; 177:335-46. [PMID: 21187124 DOI: 10.1016/j.neuroscience.2010.12.039] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2010] [Accepted: 12/21/2010] [Indexed: 02/05/2023]
Abstract
Multiple neurotrophic factors play a role in proliferation, differentiation and survival in the olfactory epithelium (OE); however, the signaling cascade has not been fully elucidated. We tested the hypotheses that ATP induces the synthesis and secretion of two neurotrophic factors, fibroblast growth factor 2 (FGF2) and transforming growth factor alpha (TGFα), and that these neurotrophic factors have a role in inducing proliferation. Protein levels of FGF2 and TGFα were increased 20 h post-intranasal instillation of ATP compared to vehicle control in adult Swiss Webster mice. Pre-intranasal treatment with purinergic receptor antagonist pyridoxal-phosphate-6-azophenyl-20,40-disulfonic acid (PPADS) significantly blocked this ATP-induced increase, indicating that upregulation of FGF2 and TGFα expression is mediated by purinergic receptor activation. However, in neonatal mouse, intranasal instillation of ATP significantly increased the protein levels of FGF2, but not TGFα. Likewise, ATP evoked the secretion of FGF2, but not TGFα, from neonatal mouse olfactory epithelial slices and PPADS significantly blocked ATP-evoked FGF2 release. To determine the role of FGF2 and TGFα in inducing proliferation, 5-bromo-2-deoxyuridine (BrdU) incorporation was examined in adult olfactory epithelium. Intranasal treatment with FGF receptor inhibitor PD173074 or epidermal growth factor receptor inhibitor AG1478 following ATP instillation significantly blocked ATP-induced BrdU incorporation. Collectively, these data demonstrate that ATP induces proliferation in adult mouse olfactory epithelium by promoting FGF2 and TGFα synthesis and activation of their receptors. These data suggest that different mechanisms regulate neurogenesis in neonatal and adult OE, and FGF2 and TGFα may have different roles throughout development.
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Jia C, Batterman S, Godwin C, Charles S, Chin JY. Sources and migration of volatile organic compounds in mixed-use buildings. INDOOR AIR 2010; 20:357-369. [PMID: 20579132 DOI: 10.1111/j.1600-0668.2010.00643.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
UNLABELLED We examined concentrations and migration of volatile organic compounds (VOCs) in ten mixed-use buildings in southeast Michigan, USA. In an office and work zone in each building, air exchange rates (AERs) were measured using perfluorocarbon tracers, and over 96 VOC species were measured by GC/MS over a 7-day period. VOCs were then apportioned to sources in offices, work zones, and outdoors using a two-zone mass balance model. AERs averaged 3.9 h (0.2-14.2 h) in offices and 1.9 h (0.4-3.5 h) in work zones. The dominant VOCs included aromatics, terpenes and alkanes. VOC concentrations were uniform in the smaller spaces, and more variable in some of the very large spaces. Apportionments depended on the VOC and building, but emissions in industrial zones of buildings often migrated to office areas where they frequently accounted for the bulk of VOC concentrations. Outdoor sources accounted for most benzene and carbon tetrachloride, and a small fraction of aromatic and aliphatic compounds. This study shows that pollutant migration can be a significant and not uncommon problem in mixed-use buildings, and it demonstrates the need for better control of emissions and pollutant migration. PRACTICAL IMPLICATIONS Pollutant exposures in industrial, commercial, and institutional buildings arise from indoor and outdoor sources that can be identified, apportioned, and controlled with knowledge of emission sources and building airflows. We show that multi-tracer techniques are an effective and practical means of determining airflows and exchange rates in large buildings. In examining a set of mixed-use buildings, a substantial fraction of VOC exposures in otherwise relatively 'clean' offices is due to pollutant migration from 'dirty' zones of the building. This indicates the need for corrective actions to minimize exposures of office workers that are unwanted and probably unknown to building managers. These actions should include better control of emissions, isolation or control of air and pollutant flows between building zones, and documentation of the effectiveness of such measures when strong emission sources are present.
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