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Arndt PT, Huennekens J, Packard C, Tran V, Carey J, Livingston R, Marcune VM, Rowe BA, Ng J, Qi J, Lyyra AM, Ahmed EH. The effect of collisions on the rotational angular momentum of diatomic molecules studied using polarized light. J Chem Phys 2020; 153:184310. [DOI: 10.1063/5.0024380] [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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Shi J, Qi J, Liang Y, Wang L, Huang G, Chen S, Wang M, Zhao Y. 38P Study on human plasma concentration and serosal permeation of oral apatinib mesylate. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Chu Y, Chen F, Sheng Z, Zhang D, Zhang S, Wang W, Jin H, Qi J, Guo L. Blood cancer diagnosis using ensemble learning based on a random subspace method in laser-induced breakdown spectroscopy. BIOMEDICAL OPTICS EXPRESS 2020; 11:4191-4202. [PMID: 32923036 PMCID: PMC7449721 DOI: 10.1364/boe.395332] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 06/12/2020] [Accepted: 06/22/2020] [Indexed: 05/08/2023]
Abstract
There are two main challenges in the diagnosis of blood cancer. The first is to diagnose cancer from healthy control, and the second is to identify the types of blood cancer. The chemometrics method combined with laser-induced breakdown spectroscopy (LIBS) can be used for cancer detection. However, chemometrics methods were easily influenced by the spectral feature redundancy and noise, resulting in low accuracy rate because of their simple structure. We proposed an approach using LIBS combined with the ensemble learning based on the random subspace method (RSM). The serum samples were dripped onto a boric acid substrate for LIBS spectrum collection. The complete blood cancer sample set include leukemia [acute myeloid leukemia (AML) and chronic myelogenous leukemia (CML)], multiple myeloma (MM), and lymphoma. The results showed that the accuracy rates using k nearest neighbors (kNN) and linear discriminant analysis (LDA) only were 88.14% and 94.45%, respectively, while using RSM with LDA (RSM-LDA), the average accuracy rate was improved from 94.45% to 98.34%. Furthermore, the variable importance of spectral lines (Na, K, Mg, Ca, H, O, N, C-N) were evaluated by the RSM-LDA model, which can improve the recognition ability of blood cancer types. Comparing the RSM-LDA model and only with LDA, the results showed that the average accuracy rate for cancer type identification was improved from 80.4% to 91.0%. These results demonstrate that LIBS combined with the RSM-LDA model can discriminate the blood cancer from the health control, as well as the recognition the types for blood cancers.
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Liu YP, Zhang YJ, Dong JJ, Lee H, Wei ZX, Zhang WL, Chen CY, Yuan HQ, Yang YF, Qi J. Hybridization Dynamics in CeCoIn_{5} Revealed by Ultrafast Optical Spectroscopy. PHYSICAL REVIEW LETTERS 2020; 124:057404. [PMID: 32083911 DOI: 10.1103/physrevlett.124.057404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 01/14/2020] [Accepted: 01/15/2020] [Indexed: 06/10/2023]
Abstract
We investigate the quasiparticle dynamics in the prototypical heavy fermion CeCoIn_{5} using ultrafast optical pump-probe spectroscopy. Our results indicate that this material system undergoes hybridization fluctuations before the establishment of heavy electron coherence, as the temperature decreases from ∼120 K (T^{†}) to ∼55 K (T^{*}). We reveal that the anomalous coherent phonon softening and damping reduction below T^{*} are directly associated with the emergence of collective hybridization. We also discover a distinct collective mode with an energy of ∼8 meV, which may be experimental evidence of the predicted unconventional density wave. Our findings provide important information for understanding the hybridization dynamics in heavy fermion systems.
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Gao Y, Kaushik S, Philip EJ, Li Z, Qin Y, Liu YP, Zhang WL, Su YL, Chen X, Weng H, Kharzeev DE, Liu MK, Qi J. Chiral terahertz wave emission from the Weyl semimetal TaAs. Nat Commun 2020; 11:720. [PMID: 32024831 PMCID: PMC7002692 DOI: 10.1038/s41467-020-14463-1] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 01/08/2020] [Indexed: 11/23/2022] Open
Abstract
Weyl semimetals host chiral fermions with distinct chiralities and spin textures. Optical excitations involving those chiral fermions can induce exotic carrier responses, and in turn lead to novel optical phenomena. Here, we discover strong coherent terahertz emission from Weyl semimetal TaAs, which is demonstrated as a unique broadband source of the chiral terahertz wave. The polarization control of the THz emission is achieved by tuning photoexcitation of ultrafast photocurrents via the photogalvanic effect. In the near-infrared regime, the photon-energy dependent nonthermal current due to the predominant circular photogalvanic effect can be attributed to the radical change of the band velocities when the chiral Weyl fermions are excited during selective optical transitions between the tilted anisotropic Weyl cones and the massive bulk bands. Our findings provide a design concept for creating chiral photon sources using quantum materials and open up new opportunities for developing ultrafast opto-electronics using Weyl physics.
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Zhang JQ, Wang YY, Xu KP, Qi J, Wang X, Xu LM, Liu NN, Zhao LJ, Wang P. [Prognostic evaluation of nutritional indicators in patients with limited-stage small cell lung cancer]. ZHONGHUA ZHONG LIU ZA ZHI [CHINESE JOURNAL OF ONCOLOGY] 2020; 41:937-942. [PMID: 31874552 DOI: 10.3760/cma.j.issn.0253-3766.2019.12.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore the effect of nutritional status pre-and during chemoradiotherapy on the prognosis of patients with limited- stage small cell lung cancer (LS-SCLC). Methods: We retrospectively collected medical records of 172 LS-SCLC patients undergoing concurrent chemoradiotherapy in our hospital from 2000 to 2014, with 126 males and 46 females. The data of complete blood count and hepatic and renal function were collected before initial treatment, before radiotherapy, 4 weeks during radiotherapy, and 1 month after complete of treatment. The prognostic nutritional index(PNI)was calculated. Kaplan-Meier method was used to calculate the survival rate. Log-rank test was performed used to compare the survival differences between groups. Multivariate prognostic analysis was performed using Cox regression model. Results: The median overall survival (OS) was 21 months, with median progression-free survival (PFS) of 11 months. At the beginning of treatment, patients with pre-treatment PNI ≥ 53 had significantly superior OS (median 37 vs 15 months, P=0.001) and PFS (median 16 vs 10 months, P=0.017). Patients with pre-treatment hemoglobin ≥140 g/L and <140 g/L had an median OS of 32 months and 17 months (P=0.019), and median PFS of 16 months and 9 months (P=0.040), respectively. During chemoradiation, patients with elevated hemoglobin had similar median OS compared with those had decreased hemoglobin (27 vs 18 months, P=0.063, but superior median PFS (15 vs 9 months, P=0.017). Multivariate analysis revealed that prophylactic cranial irradiation, pre-treatment hemoglobin ≥140 g/L, and pretreatment PNI ≥53 were independent predictors of OS and PFS in patients with LS-SCLC. Conclusion: Pre-treatment nutritional status and the changes of nutritional status during chemoradiotherapy is significantly associated with the prognosis of patients with limited-stage small cell lung cancer. The patients with better pre-treatment nutritional status have a better prognosis.
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Stolin A, Jaliparthi G, Raylman R, Brefczynski-Lewis J, Majewski S, Qi J, Gong K, Dolinsky S. Evaluation of Hamamatsu PET imaging modules for dedicated TOF-capable scanners. IEEE TRANSACTIONS ON RADIATION AND PLASMA MEDICAL SCIENCES 2019; 3:634-639. [PMID: 33748561 PMCID: PMC7970710 DOI: 10.1109/trpms.2019.2894974] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Time-of-flight (TOF) capability is becoming an important capability offered in both commercial and research PET scanners. Often commercial vendors and laboratory researchers develop and utilize proprietary electronics for their devices. Consequently, it is challenging for independent research groups to develop their own TOF-PET scanners. In this investigation, we tested a prototype scanner consisting of commercially available TOF-capable modules from Hamamatsu Photonics that can be used as building blocks for PET scanners. The scanner consists of a ring of 16 modules, for a total diameter of 26.7 cm. Testing demonstrated that the scanner is capable of sustaining ~1 MHz single counting rate with a peak noise equivalent count rate (NECR) of 117.5 kHz at 75.25 MBq measured with NEMA NU-4 "rat" phantom. Spatial resolution of 2.3 mm 5 mm from the center of the scanner was measured. Energy resolution of 17.2% at 511 keV was measured. Peak sensitivity of 1.28% is reported. All the measurements were performed with energy cuts from 350 to 700 keV Finally, scanner timing resolution was found to be 462 ps. Results from testing of a prototype scanner constructed using newly released TOF-capable detector modules produced by Hamamatsu demonstrated the promise for these devices to create high performance PET system with TOF capabilities.
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Yang T, Jin Y, Duan H, Tu J, Jia D, Zhan S, Liu L, Qi J. Tribological properties of PAANa/UHMWPE composite materials in seawater lubrication. JOURNAL OF POLYMER ENGINEERING 2019. [DOI: 10.1515/polyeng-2019-0149] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
To prepare a high-performance anti-friction and wear-resistant composite material for friction sub-components in marine equipment, a modification was made by adding different amounts sodium polyacrylate (PAANa) to ultra-high molecular weight polyethylene (UHMWPE). PAANa/UHMWPE-blended powders were prepared at individual weight ratios of 0/100, 3/97, 5/95, 8/92, 13/87, and 18/82 with hot-press molding. In seawater, experiments of PAANa/UHMWPE composites sliding against GCr15 have been conducted with a ball-on-disk configuration in this study. The results show the surface hardness of composites was almost the same with the increase in PAANa proportion, however, the friction coefficient and wear scars of PAANa/UHMWPE composites/GCr15 sliding pairs firstly decrease and then increase. Scanning electron microscopy (SEM) results show that wear mechanism of the composites is mainly plastic deformation and spalling. The composites with PAANa content of 3% and 5% achieves better tribological properties than the pure UHMWPE material.
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Qi J, Zihang Z, Zhang J, Park YM, Shrestha D, Jianling B, Merchant AT. Periodontal Antibodies and All-Cause and Cardiovascular Disease Mortality. J Dent Res 2019; 99:51-59. [PMID: 31634041 DOI: 10.1177/0022034519884012] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Periodontitis is positively linked to cardiovascular disease (CVD), diabetes, cancer, and increased mortality. Empirically derived clusters of IgG antibodies against 19 selected periodontal microorganisms have been associated with hyperglycemia. We further investigated associations between these serum IgG antibody clusters and all-cause and CVD mortality in a representative US population. Participants free of CVD and cancer and aged ≥40 y at baseline (N = 6,491) from the Third National Health and Nutrition Examination Survey (1988 to 1994) were followed up until December 31, 2011. Antibodies were categorized into 4 clusters: red-green, orange-red, yellow-orange, and orange-blue. Over a 23-y follow-up, 2,702 deaths occurred, including 810 CVD-related deaths. In fully adjusted Cox proportional hazard models, the red-green cluster was positively associated with all-cause mortality (tertile 3 vs. tertile 1: hazard ratio [HR] = 1.43, 95% CI = 1.08 to 1.90, P = 0.015). The yellow-orange cluster was inversely associated with all-cause mortality (tertile 3 vs. tertile 1: HR = 0.78, 95% CI = 0.63 to 0.97, P = 0.028) and CVD mortality (tertile 2 vs. tertile 1: HR = 0.57, 95% CI = 0.42 to 0.77, P = 0.005). The orange-blue cluster (composed of antibodies against Eubacterium nodatum and Actinomyces naeslundii) was inversely associated with all-cause mortality (tertile 3 vs. tertile 1: HR = 0.65, 95% CI = 0.55 to 0.78, P < 0.0001) and CVD mortality (tertile 3 vs. tertile 1: HR = 0.65, 95% CI = 0.47 to 0.88, P = 0.007). These antibodies could predict prognosis or be potential intervention targets to prevent systemic effects of periodontal disease if further studies establish a causal relationship.
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Zhang J, Chen N, Qi J, Liu Q, Zhou B, Qiu X. EP1.17-09 Survival Analysis of 911 Patients with Surgically Resected Lung Cancers. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.2419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Thompson K, Rainer B, Leung S, Qi J, Chien A, Kang S. 565 The role of photo-induced collagen degeneration in the development of telangiectasias in rosacea. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.07.480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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62
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Qi J, Esfahani DR, Huang T, Ozark P, Bartom E, Hashizume R, Bonner ER, An S, Horbinski CM, James CD, Saratsis AM. Tenascin-C expression contributes to pediatric brainstem glioma tumor phenotype and represents a novel biomarker of disease. Acta Neuropathol Commun 2019; 7:75. [PMID: 31092287 PMCID: PMC6518697 DOI: 10.1186/s40478-019-0727-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Accepted: 04/22/2019] [Indexed: 12/27/2022] Open
Abstract
Diffuse intrinsic pontine glioma (DIPG), an infiltrative, high grade glioma (HGG) affecting young children, has the highest mortality rate of all pediatric cancers. Despite treatment, average survival is less than twelve months, and five-year survival under 5%. We previously detected increased expression of Tenascin-C (TNC) protein in DIPG cerebrospinal fluid and tumor tissue relative to normal specimens. TNC is an extracellular matrix (ECM) glycoprotein that mediates cell-matrix interactions, guides migrating neurons during normal brain development and is thought to maintain the periventricular stem cell niche in the developing brain. Tumor TNC expression is reported in adult glioma and other cancers. However, the pattern and effects of TNC expression in DIPG has not been previously explored. Here, we characterize TNC expression in patient derived pediatric supratentorial HGG (n = 3) and DIPG (n = 6) cell lines, as well as pediatric glioma tumor (n = 50) and normal brain tissue specimens (n = 3). We found tumor specific TNC gene and protein overexpression that directly correlated with higher tumor grade (WHO III and IV, p = 0.05), H3K27 M mutation (p = 0.012), shorter progression free survival (p = 0.034), and poorer overall survival (0.041) in association with these factors. TNC knockdown via lentiviral shRNA transfection of HGG (n = 1) and DIPG (n = 3) cell lines resulted in decreased cell proliferation, migration, and invasion in vitro (p < 0.01), while TNC cDNA transfection resulted in increased cell migration, invasion and proliferation (p < 0.01) as well as altered cell morphology in H3K27 M mutant DIPG lines. Whole transcriptome sequencing analysis (RNA-Seq) on DIPG (n = 3) and HGG (n = 2) cell lines after TNC cDNA, shRNA, and empty vector control transfection revealed the effects of TNC expression level on global gene expression profiles. Together, our findings reveal TNC expression in DIPG in association with H3K27 M mutation and VEGF signaling, and suggest that TNC may contribute to DIPG tumor phenotype, and serve as a clinically detectable biomarker for DIPG.
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Zhao YC, Lyu HC, Yang G, Dong BW, Qi J, Zhang JY, Zhu ZZ, Sun Y, Yu GH, Jiang Y, Wei HX, Wang J, Lu J, Wang ZH, Cai JW, Shen BG, Zhan WS, Yang F, Zhang SJ, Wang SG. Direct observation of magnetic contrast obtained by photoemission electron microscopy with deep ultra-violet laser excitation. Ultramicroscopy 2019; 202:156-162. [PMID: 31063898 DOI: 10.1016/j.ultramic.2019.04.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 03/31/2019] [Accepted: 04/17/2019] [Indexed: 11/28/2022]
Abstract
Magnetic circular dichroism (MCD) and magnetic linear dichroism (MLD) have been investigated in a photoemission electron microscopy (PEEM) system excited by a deep ultra-violet (DUV) laser (with λ = 177.3 nm and hυ = 7.0 eV) for the first time. High resolution PEEM magnetic images (down to 43.2 nm) were directly obtained on a (001)-oriented magnetic FePt film surface with a circularly-polarized light under normal incidence. Furthermore, a stepped Cr seeding layer was applied to induce the formation of large-area epitaxial FePt films with (001) and (111) two orientations, where MLD with large asymmetry was observed in the transition area of two phases. It demonstrates that DUV laser can be a powerful source for high resolution magnetic imaging in the laboratory in absence of synchrotron facilities.
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Qi J, Kerr G. The effects of non-invasive transcranial brain current stimulation (tDCS) on length trace over the unstable surface in healthy old individuals: a randomised double-blind sham-controlled crossover study. Brain Stimul 2019. [DOI: 10.1016/j.brs.2018.12.383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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65
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Kong Q, Zhang L, An P, Qi J, Yu X, Lu J, Ren X. Antifungal mechanisms of α‐terpineol and terpene‐4‐alcohol as the critical components of
Melaleuca alternifolia
oil in the inhibition of rot disease caused by
Aspergillus ochraceus
in postharvest grapes. J Appl Microbiol 2019; 126:1161-1174. [DOI: 10.1111/jam.14193] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 11/17/2018] [Accepted: 12/12/2018] [Indexed: 01/01/2023]
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He Y, Li J, Mao W, Zhang D, Liu M, Shan X, Zhang B, Zhu C, Shen J, Deng Z, Wang Z, Yu W, Chen Q, Guo W, Su P, Lv R, Li G, Li G, Pei B, Jiao L, Shen G, Liu Y, Feng Z, Su Y, Xie Y, Di W, Liu X, Yang X, Wang J, Qi J, Liu Q, Han Y, He J, Cai J, Zhang Z, Zhu F, Du D. HLA common and well-documented alleles in China. HLA 2018; 92:199-205. [DOI: 10.1111/tan.13358] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 06/22/2018] [Accepted: 07/29/2018] [Indexed: 11/29/2022]
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Wang W, Yuan W, Wei XD, Qi J, Ma J. [Expression of granulocyte colony-stimulating factor receptor in colitis-associated colonic carcinogenesis]. ZHONGHUA ZHONG LIU ZA ZHI [CHINESE JOURNAL OF ONCOLOGY] 2018; 40:653-658. [PMID: 30293388 DOI: 10.3760/cma.j.issn.0253-3766.2018.09.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the expression of granulocyte-colony stimulating factor receptor (G-CSFR) in a mouse model of colitis-associated cancer (CAC), and the roles of G-CSFR positive immune cells in the development of CAC. Methods: The C57BL/6 mouse model of CAC was established by azoxymethane and dextran sulphate sodium. Three different stages in the development of CAC, including inflammation (AD1), mild dysplasia (AD2) and adenocarcinoma (AD3) were simulated. Colon tissue was digested into single cell suspension and the expressions of G-CSF and G-CSFR were analyzed by real-time PCR and fluorescence activated cell sorter (FACS). The expressions of G-CSFR on T cell, macrophage and neutrophil were analyzed by FACS. Results: The establishment of mouse model can effectively simulate the disease progression of CAC. The results of real-time PCR detection showed that the expression level of G-CSF mRNA in AD1, AD2 and AD3 groups were 1.2, 7.3 and 18.0-fold changes of the control group, respectively. The differences between AD2, AD3 and control groups were statistically significant (P<0.05). G-CSFR mRNA levels in AD1, AD2 and AD3 groups were 1.5, 2.2 and 4.5-fold changes of the control group, respectively. The difference between AD3 and control groups was statistically significant (P<0.05). FACS showed that the percentages of CD45(+) G-CSFR(+) cells in colorectal tissues of the control group, AD1, AD2 and AD3 groups were (21.84±1.77)%, (41.48±4.15)%, (44.84±8.54)% and (57.76±1.95)%, respectively.The percentages of CD45(+) G-CSFR(+) cells in AD2 and AD3 groups were significantly higher than that of control group (P<0.05). The percentages of CD45(+) G-CSFR(+) macrophage in the colorectal tissues of the control group, AD1, AD2 and AD3 groups were (21.54±5.88)%, (47.14±5.25)%, (42.49±7.80)% and (29.25±8.24)%, respectively. The percentages of CD45(+) G-CSFR(+) T cells in these groups were (30.04±6.87)%, (29.65±8.08)%, (33.75±7.37)% and (33.32±9.85)%, respectively. The percentages of CD45(+) G-CSFR(+) granulocyte were (2.39±2.10)%, (4.05±1.56)%, (3.62±2.67)% and (2.26±0.85)%, respectively (P<0.05). The percentages of G-CSFR(+) macrophage and G-CSFR(+) T cells were significantly higher than that of G-CSFR(+) granulocyte (P<0.05). The differences between AD1 and control group, AD2 and control group, AD1 and AD2 group, AD2 and AD3 group were statistically significant (P<0.05). Conclusions: The expression of G-CSFR is significantly up-regulated in the development of CAC. The enrichment of G-CSFR(+) macrophages in the colon tissue suggests G-CSFR(+) macrophages participate in the development of CAC.
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Zhou C, Liu YP, Wang Z, Ma SJ, Jia MW, Wu RQ, Zhou L, Zhang W, Liu MK, Wu YZ, Qi J. Broadband Terahertz Generation via the Interface Inverse Rashba-Edelstein Effect. PHYSICAL REVIEW LETTERS 2018; 121:086801. [PMID: 30192565 DOI: 10.1103/physrevlett.121.086801] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Indexed: 05/06/2023]
Abstract
Novel mechanisms for electromagnetic wave emission in the terahertz frequency regime emerging at the nanometer scale have recently attracted intense attention for the purpose of searching next-generation broadband THz emitters. Here, we report broadband THz emission, utilizing the interface inverse Rashba-Edelstein effect. By engineering the symmetry of the Ag/Bi Rashba interface, we demonstrate a controllable THz radiation (∼0.1-5 THz) waveform emitted from metallic Fe/Ag/Bi heterostructures following photoexcitation. We further reveal that this type of THz radiation can be selectively superimposed on the emission discovered recently due to the inverse spin Hall effect, yielding a unique film thickness dependent emission pattern. Our results thus offer new opportunities for versatile broadband THz radiation using the interface quantum effects.
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Qi J, Zhang B, Wang Z, Li Y, Skeldon P, Thompson G. Effect of an Fe(II)-modified trivalent chromium conversion process on Cr(VI) formation during coating of AA 2024 alloy. Electrochem commun 2018. [DOI: 10.1016/j.elecom.2018.05.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Shao J, Wu X, Liu X, Qi J, Qi Z. THE CORRELATION BETWEEN NECK CIRCUMFERENCE AND UMBILICAL ARTERY BLOOD FLOW IN PHYSIOLOGIC PREGNANCIES. ACTA ENDOCRINOLOGICA-BUCHAREST 2018; 14:268-271. [PMID: 31149269 DOI: 10.4183/aeb.2018.268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Objective To study the correlation between neck circumference(NC) and umbilical artery blood flow in physiologic pregnancies. Methods One hundred and one healthy pregnant woman in the third trimester were enrolled. Anthropometric measurements and ultrasonic testing were done. Results The women with NC ≥34.7cm had a more elevated umbilical artery pulsatility index(PI) and systolic/diastolic ratio (S/D) than the women with NC <34.7cm (P<0.01). NC were positively correlated with PI(r=0.224,P=0.024) and S/D ratio(r=0.415,P=0.0001). In multivariate analysis, NC was independently associated with PI (β=0.026, P=0.016) and S/D ratio (β=0.132, P=0.0001). Conclusions Obesity has an adverse impact on feto-placetal vessels, and NC was superior to body mass index.
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Gullà A, Hideshima T, Bianchi G, Fulciniti M, Kemal Samur M, Qi J, Tai YT, Harada T, Morelli E, Amodio N, Carrasco R, Tagliaferri P, Munshi NC, Tassone P, Anderson KC. Protein arginine methyltransferase 5 has prognostic relevance and is a druggable target in multiple myeloma. Leukemia 2018; 32:996-1002. [PMID: 29158558 PMCID: PMC5871539 DOI: 10.1038/leu.2017.334] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 10/04/2017] [Accepted: 10/06/2017] [Indexed: 01/10/2023]
Abstract
Arginine methyltransferases critically regulate cellular homeostasis by modulating the functional outcome of their substrates. The protein arginine methyltransferase 5 (PRMT5) is an enzyme involved in growth and survival pathways promoting tumorigenesis. However, little is known about the biologic function of PRMT5 and its therapeutic potential in multiple myeloma (MM). In the present study, we identified and validated PRMT5 as a new therapeutic target in MM. PRMT5 is overexpressed in patient MM cells and associated with decreased progression-free survival and overall survival. Either genetic knockdown or pharmacological inhibition of PRMT5 with the inhibitor EPZ015666 significantly inhibited growth of both cell lines and patient MM cells. Furthermore, PRMT5 inhibition abrogated NF-κB signaling. Interestingly, mass spectrometry identified a tripartite motif-containing protein 21 TRIM21 as a new PRMT5-partner, and we delineated a TRIM21-dependent mechanism of NF-κB inhibition. Importantly, oral administration of EPZ015666 significantly decreased MM growth in a humanized murine model of MM. These data both demonstrate the oncogenic role and prognostic relevance of PRMT5 in MM pathogenesis, and provide the rationale for novel therapies targeting PRMT5 to improve patient outcome.
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Cai XX, Gao H, Yan SQ, Sheng J, Gu CL, Jin ZX, Qi J, Xu YY, Zhang QF, Cao H, Tao FB, Hao JH. [Association between the internal exposure levels of phthalates and executive function of preschool children]. ZHONGHUA YU FANG YI XUE ZA ZHI [CHINESE JOURNAL OF PREVENTIVE MEDICINE] 2018; 52:296-302. [PMID: 29973011 DOI: 10.3760/cma.j.issn.0253-9624.2018.03.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the association between the internal exposure levels of phthalic acid esters (PAEs) and executive function (EF) of preschool children. Methods: Between October 2008 and October 2010, pregnant women who accepted pregnancy health care services in four municipal medical and health institutions in Ma'anshan city, Anhui Province, were recruited as study objects. A total of 5 084 pregnant women and 4 669 singleton live births were enrolled in this cohort. The follow-up study was conducted from April 2014 to April 2015. A total of 3 725 data-completed preschool children aged 3 to 6 years older entered in this study. The method of analysis seven metabolites of phthalates in urine was high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) and divided objects into low (P(0)-P(24)), medium (P(25)-P(74)) and high (P(75)-P(100)) groups according to their exposure concentrations. To investigate the executive function of preschool children, we used the Behavior Rating Inventory of Executive Function-Preschool Version (BRIEF-P). Univariate and multivariate statistical method was used to analyze the etiology association between the phthalate metabolites levels and preschool children's executive function. Results: In this study, 53.6% (1 997/3 725) of preschoolers were boys, children's age was (51.5±5.6) months. The detection rates of seven phthalate esters were: mono-n-methyl phthalate (MMP) was 99.89% (3 721/3 725); mono-ethyl phthalate (MEP) was 99.97% (3 724/3 725); mono-benzyl phthalate (MBzP) was 69.10% (2 574/3 725); mono-butyl phthalate (MBP), mono-(2-ethyl-5-oxohexyl) phthalate (MEOHP) and mono- (2-ethyl-5-hydroxyhexyl) phthalate (MEHHP) were 100.00% and mono-ethylhexyl phthalate (MEHP) was 99.95% (3 723/3 725). The median concentrations of the seven phthalate metabolites were: 17.71, 15.36, 0.07, 155.24, 10.73, 14.67, 3.59 µg/L, respectively. The median concentrations corrected by urinary creatinine were 29.65, 26.65, 0.12, 257.73, 17.94, 24.80, 6.27 µg/g Cr, respectively. The P(25) and P(7)5 concentration of the total PAEs metabolites corrected by urinary creatinine were 1.20 µmol/g Cr and 3.04 µmol/g Cr. After adjusted the relevant demographic information: children sex, children age in month, maternal age, parental education levels, household exposure to secondhand smoke and whether the child is the only child as confounds, multivariate logistic regression model showed that the risk of inhibitory self-control index (ISCI) dysplasia in MEHHP high concentration group and MEOHP high concentration group were 1.71 and 1.54 times (OR=1.71, 95% CI: 1.11-2.62; OR=1.54, 95% CI: 1.01-2.34) than in low concentration group. The risk of ISCI dysplasia in total PAEs metabolites high concentration group was 1.55 times (OR=1.55, 95% CI: 1.00-2.38) than in low concentration group. Conclusion: Phthalates exposure may damage the executive function of preschool children.
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Tunali I, Gray J, Abdullah M, Qi J, Balagurunathan Y, Guvenis A, Gillies R, Schabath M. PUB063 Epidemiologic and Radiomic Analysis of Hyperprogressers of Lung Cancer Patients Treated with Immunotherapy. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.1926] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Qi J, Zimmerman DT, Weisel GJ, Willis BG. Nucleation and growth of copper selective-area atomic layer deposition on palladium nanostructures. J Chem Phys 2017; 147:154702. [DOI: 10.1063/1.4996188] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Zhang Y, Han H, Sun L, Qiu H, Lin H, Yu L, Zhu W, Qi J, Yang R, Pang Y, Wang X, Lu G, Yang Y. Antiviral activity of shikonin ester derivative PMM-034 against enterovirus 71 in vitro. ACTA ACUST UNITED AC 2017; 50:e6586. [PMID: 28832767 PMCID: PMC5561812 DOI: 10.1590/1414-431x20176586] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2017] [Accepted: 07/03/2017] [Indexed: 12/20/2022]
Abstract
Human enterovirus 71 (EV71) is the major causative agent of hand, foot, and mouth disease (HFMD), particularly in infants and children below 4 years of age. Shikonin is a bioactive compound with anti-inflammatory, antiviral, and antibacterial activities derived from the roots of the Chinese medicinal herb Lithospermum erythrorhizon. This study aimed to examine the antiviral activity of PMM-034, a shikonin ester derivative, against EV71 in rhabdomyosarcoma (RD) cells. Cytotoxicity of PMM-034 on RD cells was determined using WST-1 assay. Dose- and time-dependent effects of PMM-034 on EV71 replication in RD cells were determined using plaque reduction assay. mRNA expression levels of EV71/VP1 and pro-inflammatory cytokines (IL-1β, IL-6, IL-8, and TNF-α) were determined by real-time RT-PCR, and EV71/VP1 and phospho-p65 protein expressions were determined by western blot analysis. PMM-034 exhibited only weak cytotoxicity against RD cells. However, PMM-034 exhibited significant antiviral activity against EV71 in RD cells with 50% inhibitory concentration of 2.31 μg/mL. The VP1 mRNA and protein levels were significantly reduced in cells treated with PMM-034. Furthermore, relative mRNA expression levels of IL-1β, IL-6, IL-8, and TNF-α significantly decreased in the cells treated with PMM-034, while the phospho-p65 protein expression was also significantly lower in the treated cells. These results indicated that PMM-034 suppressed the expressions of pro-inflammatory cytokines in RD cells, exhibiting antiviral activity against EV71, as evidenced by the reduced VP1 mRNA and protein levels in PMM-034-treated cells. Thus, PMM-034 is a promising candidate for further development as an EV71 inhibitor.
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