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Liu H, Liu J, Wang F, Qian L, Liu R. Digital Signal Compensation and Sounding Depth Analysis of Portable Frequency-Domain Electromagnetic Exploration System. Sensors (Basel) 2024; 24:566. [PMID: 38257658 PMCID: PMC10819523 DOI: 10.3390/s24020566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 01/09/2024] [Accepted: 01/11/2024] [Indexed: 01/24/2024]
Abstract
Low-resistivity objects produce eddy currents when excited with electromagnetic waves of a certain frequency and then generate an eddy electromagnetic field. A portable frequency-domain electromagnetic exploration system can be used to identify this eddy electromagnetic field, and then the low-resistivity objects can be positioned. At present, portable frequency-domain electromagnetic method (FEM) exploration systems use analog signal compensation, and the sounding depth is generally calculated using empirical formulas. In order to improve the rationality of signal compensation, this paper puts forward a digital signal compensation technology, including a device design, an information extraction method, and a primary field calibration method, and makes an exploration prototype based on the digital signal compensation technology. Using 10 nV as the minimum potential detection capability, the sounding depth of the portable FEM was analyzed, and it was found that when investigating a target with the same depth, a lower frequency required a larger emission current. If this could not be met, the sounding depth became smaller, and a phenomenon appeared in which the lower the operating frequency, the smaller the sounding depth. Through the detection of known underground garages, the apparent conductivity and normalized secondary field anomalies with higher sensitivity were obtained, which indicates that the detection system based on the digital signal compensation technology is effective in practical exploration. Via long-distance detection experiments on cars, it was confirmed that the sounding depth of the portable multi-frequency FEM in practical work indeed decreases with a decrease in the operating frequency.
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Affiliation(s)
- Huipeng Liu
- School of Geosciences and Info-Physics, Central South University, Changsha 410083, China; (H.L.); (J.L.); (R.L.)
- Yunnan Key Laboratory of Geotechnical Engineering and Geohazards, Kunming 650051, China;
- Kunming Prospecting Design Institute of China Nonferrous Metal Industry Co., Ltd., Kunming 650051, China
| | - Jianxin Liu
- School of Geosciences and Info-Physics, Central South University, Changsha 410083, China; (H.L.); (J.L.); (R.L.)
| | - Fang Wang
- Yunnan Key Laboratory of Geotechnical Engineering and Geohazards, Kunming 650051, China;
- Kunming Prospecting Design Institute of China Nonferrous Metal Industry Co., Ltd., Kunming 650051, China
| | - Leiyun Qian
- Yunnan Key Laboratory of Geotechnical Engineering and Geohazards, Kunming 650051, China;
- Kunming Prospecting Design Institute of China Nonferrous Metal Industry Co., Ltd., Kunming 650051, China
| | - Rong Liu
- School of Geosciences and Info-Physics, Central South University, Changsha 410083, China; (H.L.); (J.L.); (R.L.)
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Wen W, Qian L, Xie Y, Zhang X, Wang J, Zhou J, Liu R, Yu J, Chen D. Targeting XPO1 Combined with Radiotherapy to Enhance Systemic Anti-tumor Effects in Non-Small Cell Lung Cancer. Int J Radiat Oncol Biol Phys 2023; 117:e221-e222. [PMID: 37784904 DOI: 10.1016/j.ijrobp.2023.06.1124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) The combination of radiation and radiosensitizing chemotherapeutic agents have shown promising anti-tumor effects in NSCLC. Acting as an oncogenic driver, XPO1 is frequently overexpressed and/or mutated in lung cancer. Thus, suppression of XPO1-mediated nuclear export presents a unique therapeutic strategy. We hypothesize that XPO1 inhibition combined with radiotherapy (XRT) may remodel the tumor immune microenvironment (TIME) and reduce radioresistance, thus enhance systemic anti-tumor effects. MATERIALS/METHODS Herein, we optimized a small molecule inhibitor, WJ01024, which can bind to XPO1 and antagonize its activity to inhibit nuclear export. In the C57BL/6 mouse subcutaneous tumor model, we evaluated the ability of different treatment regimens containing oral WJ01014 single or combined with XRT (one fractions of 15 Gy) in tumor control and tumor recurrence inhibition. The effects of each treatment regimen on the alterations of immunophenotypes, including the quantification, activation, proliferative capacity, exhaustion marker expression, and memory status, were evaluated by flow cytometry. RESULTS In our study, we found that the overexpression of XPO1 was associated with poor prognosis and survival in radioresistant patients with NSCLC. The combination therapy of WJ01024 and XRT resulted in an increase of apoptosis and a decrease of proliferation compared to monotherapy, which was closely correlated with tumor regression and improved survival in the C57BL/6 mouse subcutaneous tumor model. Notably, we found that WJ01024 were shown to enhance the therapeutic effect of XRT by remodeling TIME. Compared with XRT, the addition of WJ01024 increased the infiltration and proliferation of radiation-stimulated CD8+ T cells, which especially promoted the production of interferon-γ and granzyme B. Moreover, the combination therapy also reversed the immunosuppressive effect of radiation on the percentage of Tregs and exhausted T cells in mouse xenografts. Thus, the TIME was significantly improved in combination therapy. Strikingly, mechanistic studies suggested that the activation of cyclic GMP-AMP synthase/stimulator of interferon genes (cGAS/STING) signaling pathway is required to reshape TIME and produce synergistic anti-tumor effect with the combination of WJ01024 and XRT. CONCLUSION Our findings suggest that WJ01024 might be a potential synergistic treatment for radiotherapy to control the proliferation of NSCLC cells, promote tumor regression and prolong survival in mouse model of NSCLC by activating cGAS/STING signaling, and this in turn potentiate the immune microenvironment.
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Affiliation(s)
- W Wen
- Department of Radiation Oncology and Shandong Provincial Key Laboratory of Radiation Oncology, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - L Qian
- wigen biomedicine technology, Shanghai, China
| | - Y Xie
- wigen biomedicine technology, Shanghai, China
| | - X Zhang
- Department of Radiation Oncology and Shandong Provincial Key Laboratory of Radiation Oncology, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - J Wang
- Department of Radiation Oncology and Shandong Provincial Key Laboratory of Radiation Oncology, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - J Zhou
- Department of Radiation Oncology and Shandong Provincial Key Laboratory of Radiation Oncology, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - R Liu
- Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - J Yu
- Department of Radiation Oncology and Shandong Provincial Key Laboratory of Radiation Oncology, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - D Chen
- Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
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Pan Z, Lu JG, Jiang P, Han JL, Chen HL, Han ZW, Liu K, Qian L, Xu RX, Zhang B, Luo JT, Yan Z, Yang ZL, Zhou DJ, Wang PF, Wang C, Li MH, Zhu M. A binary pulsar in a 53-minute orbit. Nature 2023; 620:961-964. [PMID: 37339734 PMCID: PMC10468392 DOI: 10.1038/s41586-023-06308-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2023] [Accepted: 06/12/2023] [Indexed: 06/22/2023]
Abstract
Spider pulsars are neutron stars that have a companion star in a close orbit. The companion star sheds material to the neutron star, spinning it up to millisecond rotation periods, while the orbit shortens to hours. The companion is eventually ablated and destroyed by the pulsar wind and radiation1,2. Spider pulsars are key for studying the evolutionary link between accreting X-ray pulsars and isolated millisecond pulsars, pulsar irradiation effects and the birth of massive neutron stars3-6. Black widow pulsars in extremely compact orbits (as short as 62 minutes7) have companions with masses much smaller than 0.1 M⊙. They may have evolved from redback pulsars with companion masses of about 0.1-0.4 M⊙ and orbital periods of less than 1 day8. If this is true, then there should be a population of millisecond pulsars with moderate-mass companions and very short orbital periods9, but, hitherto, no such system was known. Here we report radio observations of the binary millisecond pulsar PSR J1953+1844 (M71E) that show it to have an orbital period of 53.3 minutes and a companion with a mass of around 0.07 M⊙. It is a faint X-ray source and located 2.5 arcminutes from the centre of the globular cluster M71.
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Affiliation(s)
- Z Pan
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing, People's Republic of China
- Guizhou Radio Astronomical Observatory, Guizhou University, Guiyang, People's Republic of China
- College of Astronomy and Space Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, People's Republic of China
- Key Laboratory of Radio Astronomy and Technology, Chinese Academy of Sciences, Beijing, People's Republic of China
| | - J G Lu
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing, People's Republic of China
- Guizhou Radio Astronomical Observatory, Guizhou University, Guiyang, People's Republic of China
- College of Astronomy and Space Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, People's Republic of China
- Key Laboratory of Radio Astronomy and Technology, Chinese Academy of Sciences, Beijing, People's Republic of China
| | - P Jiang
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing, People's Republic of China.
- Guizhou Radio Astronomical Observatory, Guizhou University, Guiyang, People's Republic of China.
- College of Astronomy and Space Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, People's Republic of China.
- Key Laboratory of Radio Astronomy and Technology, Chinese Academy of Sciences, Beijing, People's Republic of China.
| | - J L Han
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing, People's Republic of China.
- College of Astronomy and Space Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, People's Republic of China.
- Key Laboratory of Radio Astronomy and Technology, Chinese Academy of Sciences, Beijing, People's Republic of China.
| | - H-L Chen
- Yunnan Observatories, Chinese Academy of Sciences, Kunming, People's Republic of China
| | - Z W Han
- Yunnan Observatories, Chinese Academy of Sciences, Kunming, People's Republic of China
- University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, People's Republic of China
| | - K Liu
- Max-Planck-Institut für Radioastronomie, Bonn, Germany
| | - L Qian
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing, People's Republic of China
- Guizhou Radio Astronomical Observatory, Guizhou University, Guiyang, People's Republic of China
- College of Astronomy and Space Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, People's Republic of China
- Key Laboratory of Radio Astronomy and Technology, Chinese Academy of Sciences, Beijing, People's Republic of China
| | - R X Xu
- Department of Astronomy, Peking University, Beijing, People's Republic of China
- Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing, People's Republic of China
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing, People's Republic of China
| | - B Zhang
- Nevada Center for Astrophysics, University of Nevada, Las Vegas, NV, USA.
- Department of Physics and Astronomy, University of Nevada, Las Vegas, NV, USA.
| | - J T Luo
- National Time Service Center, Chinese Academy of Sciences, Xi'an, China
| | - Z Yan
- College of Astronomy and Space Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, People's Republic of China
- Key Laboratory of Radio Astronomy and Technology, Chinese Academy of Sciences, Beijing, People's Republic of China
- Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai, People's Republic of China
| | - Z L Yang
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing, People's Republic of China
- College of Astronomy and Space Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, People's Republic of China
- Key Laboratory of Radio Astronomy and Technology, Chinese Academy of Sciences, Beijing, People's Republic of China
| | - D J Zhou
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing, People's Republic of China
- College of Astronomy and Space Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, People's Republic of China
- Key Laboratory of Radio Astronomy and Technology, Chinese Academy of Sciences, Beijing, People's Republic of China
| | - P F Wang
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing, People's Republic of China
- College of Astronomy and Space Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, People's Republic of China
- Key Laboratory of Radio Astronomy and Technology, Chinese Academy of Sciences, Beijing, People's Republic of China
| | - C Wang
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing, People's Republic of China
- College of Astronomy and Space Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, People's Republic of China
- Key Laboratory of Radio Astronomy and Technology, Chinese Academy of Sciences, Beijing, People's Republic of China
| | - M H Li
- State Key Laboratory of Public Big Data, Guizhou University, Guiyang, People's Republic of China
| | - M Zhu
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing, People's Republic of China
- Guizhou Radio Astronomical Observatory, Guizhou University, Guiyang, People's Republic of China
- College of Astronomy and Space Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, People's Republic of China
- Key Laboratory of Radio Astronomy and Technology, Chinese Academy of Sciences, Beijing, People's Republic of China
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Zhou C, Lu Y, Kim SW, Baisamut (Reungwetwattana) T, Zhou J, Zhang Y, He J, Yang J, Cheng Y, Lee SH, Chang J, Fang J, Liu Z, Bu L, Qian L, Xu T, Archer V, Hilton M, Zhou M, Zhang L. LBA11 Alectinib (ALC) vs crizotinib (CRZ) in Asian patients (pts) with treatment-naïve advanced ALK+ non-small cell lung cancer (NSCLC): 5-year update from the phase III ALESIA study. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.10.353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022] Open
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Wang YF, Ren Y, Zhu CF, Qian L, Yang Q, Deng WM, Zou LY, Liu Z, Luo DH. Optimising diffusion-weighted imaging of the thyroid gland using dedicated surface coil. Clin Radiol 2022; 77:e791-e798. [PMID: 36096939 DOI: 10.1016/j.crad.2022.07.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 07/06/2022] [Accepted: 07/08/2022] [Indexed: 11/03/2022]
Abstract
AIM To assess the feasibility of applying field-of-view (FOV) optimised and constrained undistorted single-shot (FOCUS) diffusion-weighted imaging (DWI) in the thyroid gland by comparing its image quality with conventional DWI (C-DWI) qualitatively and quantitatively using a dedicated surface coil exclusively designed for the thyroid gland at 3 T magnetic resonance imaging (MRI). MATERIALS AND METHODS In this prospective study, 32 healthy volunteers who had undergone 3 T the thyroid gland MRI with FOCUS-DWI and C-DWI were enrolled. Two independent reviewers assessed the overall image quality, artefacts, sharpness, and geometric distortion based on a five-point Likert scale. The signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), and apparent diffusion coefficient (ADC) were quantified for both sequences. Interobserver agreement, qualitative scores, and quantitative parameters were compared between two sequences. RESULTS Agreement between the two readers was good for FOCUS-DWI (κ = 0.714-0.778) and moderate to good for C-DWI (κ = 0.525-0.672) in qualitative image quality assessment. Qualitatively, image quality (overall image quality, artefacts, sharpness, and geometric distortion) was significantly better in FOCUS-DWI than that in the C-DWI (all p<0.05); however, quantitatively, FOCUS-DWI had significantly lower SNRs (p<0.001) and CNRs (p=0.012) compared with C-DWI. The ADC value on FOCUS-DWI was significantly higher than that on C-DWI (p<0.001). CONCLUSION FOCUS-DWI depicted the thyroid gland with significantly better image quality qualitatively and less ghost artefacts, but had significantly lower SNR and CNR quantitatively, compared with C-DWI, suggesting that both DWI sequences have advantages and could be chosen for different purposes.
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Affiliation(s)
- Y F Wang
- Department of Radiology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital & Shenzhen Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Shenzhen, 518116, China
| | - Y Ren
- Department of Radiology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital & Shenzhen Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Shenzhen, 518116, China
| | - C F Zhu
- Department of Radiology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital & Shenzhen Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Shenzhen, 518116, China
| | - L Qian
- MR Research, GE Healthcare, Beijing, China
| | - Q Yang
- Department of Radiology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital & Shenzhen Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Shenzhen, 518116, China
| | - W M Deng
- Department of Radiology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital & Shenzhen Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Shenzhen, 518116, China
| | - L Y Zou
- Department of Radiology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital & Shenzhen Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Shenzhen, 518116, China
| | - Z Liu
- Department of Radiology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital & Shenzhen Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Shenzhen, 518116, China.
| | - D H Luo
- Department of Radiology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital & Shenzhen Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Shenzhen, 518116, China; Department of Radiology, National Cancer Center/National Clinical Research Center for Cancer, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China.
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6
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Chakraborty S, Qian L, Baker JBH, Ruohoniemi JM, Kuyeng K, Mclnerney JM. Driving Influences of the Doppler Flash Observed by SuperDARN HF Radars in Response to Solar Flares. J Geophys Res Space Phys 2022; 127:e2022JA030342. [PMID: 35864909 PMCID: PMC9286435 DOI: 10.1029/2022ja030342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 05/23/2022] [Accepted: 05/24/2022] [Indexed: 06/15/2023]
Abstract
Sudden enhancement in high-frequency absorption is a well-known impact of solar flare-driven Short-Wave Fadeout (SWF). Less understood, is a perturbation of the radio wave frequency as it traverses the ionosphere in the early stages of SWF, also known as the Doppler flash. Investigations have suggested two possible sources that might contribute to it's manifestation: first, enhancements of plasma density in the D-and lower E-regions; second, the lowering of the F-region reflection point. Our recent work investigated a solar flare event using first principles modeling and Super Dual Auroral Radar Network (SuperDARN) HF radar observations and found that change in the F-region refractive index is the primary driver of the Doppler flash. This study analyzes multiple solar flare events observed across different SuperDARN HF radars to determine how flare characteristics, properties of the traveling radio wave, and geophysical conditions impact the Doppler flash. In addition, we use incoherent scatter radar data and first-principles modeling to investigate physical mechanisms that drive the lowering of the F-region reflection points. We found, (a) on average, the change in E- and F-region refractive index is the primary driver of the Doppler flash, (b) solar zenith angle, ray's elevation angle, operating frequency, and location of the solar flare on the solar disk can alter the ionospheric regions of maximum contribution to the Doppler flash, (c) increased ionospheric Hall and Pedersen conductance causes a reduction of the daytime eastward electric field, and consequently reduces the vertical ion-drift in the lower and middle latitude ionosphere, which results in lowering of the F-region ray reflection point.
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Affiliation(s)
- S. Chakraborty
- Bradley Department of Electrical and Computer EngineeringVirginia TechBlacksburgVAUSA
| | - L. Qian
- National Center for Atmospheric ResearchBoulderCOUSA
| | - J. B. H. Baker
- Bradley Department of Electrical and Computer EngineeringVirginia TechBlacksburgVAUSA
| | - J. M. Ruohoniemi
- Bradley Department of Electrical and Computer EngineeringVirginia TechBlacksburgVAUSA
| | - K. Kuyeng
- Radio Observatorio de JicamarcaInstituto Geofisico del PeruLimaPeru
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7
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Qian L, Ye ZQ, Huang Y. [Recent advances in predictive models for prognosis in pediatric inflammatory bowel disease]. Zhonghua Er Ke Za Zhi 2022; 60:159-162. [PMID: 35090239 DOI: 10.3760/cma.j.cn112140-20210702-00548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Affiliation(s)
- L Qian
- Department of Gastroenterology, Children's Hospital of Fudan University, Shanghai 201102, China
| | - Z Q Ye
- Department of Gastroenterology, Children's Hospital of Fudan University, Shanghai 201102, China
| | - Y Huang
- Department of Gastroenterology, Children's Hospital of Fudan University, Shanghai 201102, China
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8
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Ching TC, Li D, Heiles C, Li ZY, Qian L, Yue YL, Tang J, Jiao SH. An early transition to magnetic supercriticality in star formation. Nature 2022; 601:49-52. [PMID: 34987214 PMCID: PMC8732270 DOI: 10.1038/s41586-021-04159-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Accepted: 10/18/2021] [Indexed: 12/02/2022]
Abstract
Magnetic fields have an important role in the evolution of interstellar medium and star formation1,2. As the only direct probe of interstellar field strength, credible Zeeman measurements remain sparse owing to the lack of suitable Zeeman probes, particularly for cold, molecular gas3. Here we report the detection of a magnetic field of +3.8 ± 0.3 microgauss through the H I narrow self-absorption (HINSA)4,5 towards L15446,7—a well-studied prototypical prestellar core in an early transition between starless and protostellar phases8–10 characterized by a high central number density11 and a low central temperature12. A combined analysis of the Zeeman measurements of quasar H I absorption, H I emission, OH emission and HINSA reveals a coherent magnetic field from the atomic cold neutral medium (CNM) to the molecular envelope. The molecular envelope traced by the HINSA is found to be magnetically supercritical, with a field strength comparable to that of the surrounding diffuse, magnetically subcritical CNM despite a large increase in density. The reduction of the magnetic flux relative to the mass, which is necessary for star formation, thus seems to have already happened during the transition from the diffuse CNM to the molecular gas traced by the HINSA. This is earlier than envisioned in the classical picture where magnetically supercritical cores capable of collapsing into stars form out of magnetically subcritical envelopes13,14. An analysis of Zeeman measurements reveals that the reduction of magnetic flux relative to mass, which is necessary for star formation, seems to have occurred earlier than previously thought.
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Affiliation(s)
- T-C Ching
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China
| | - D Li
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China. .,Department of Astronomy, University of Chinese Academy of Sciences, Beijing, China. .,NAOC-UKZN Computational Astrophysics Centre, University of KwaZulu-Natal, Durban, South Africa.
| | - C Heiles
- Department of Astronomy, University of California, Berkeley, Berkeley, CA, USA
| | - Z-Y Li
- Astronomy Department, University of Virginia, Charlottesville, VA, USA
| | - L Qian
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China
| | - Y L Yue
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China
| | - J Tang
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China
| | - S H Jiao
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China.,Department of Astronomy, University of Chinese Academy of Sciences, Beijing, China
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9
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Li D, Wang P, Zhu WW, Zhang B, Zhang XX, Duan R, Zhang YK, Feng Y, Tang NY, Chatterjee S, Cordes JM, Cruces M, Dai S, Gajjar V, Hobbs G, Jin C, Kramer M, Lorimer DR, Miao CC, Niu CH, Niu JR, Pan ZC, Qian L, Spitler L, Werthimer D, Zhang GQ, Wang FY, Xie XY, Yue YL, Zhang L, Zhi QJ, Zhu Y. Author Correction: A bimodal burst energy distribution of a repeating fast radio burst source. Nature 2021; 601:E1. [PMID: 34912125 DOI: 10.1038/s41586-021-04178-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- D Li
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China. .,University of Chinese Academy of Sciences, Beijing, China.
| | - P Wang
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - W W Zhu
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - B Zhang
- Department of Physics and Astronomy, University of Nevada, Las Vegas, Las Vegas, NV, USA.
| | - X X Zhang
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - R Duan
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - Y K Zhang
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Y Feng
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China.,CSIRO Astronomy and Space Science, Epping, New South Wales, Australia
| | - N Y Tang
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China.,Department of Physics, Anhui Normal University, Wuhu, China
| | - S Chatterjee
- Cornell Center for Astrophysics and Planetary Science and Department of Astronomy, Cornell University, Ithaca, NY, USA
| | - J M Cordes
- Cornell Center for Astrophysics and Planetary Science and Department of Astronomy, Cornell University, Ithaca, NY, USA
| | - M Cruces
- Max-Planck-Institut für Radioastronomie, Bonn, Germany
| | - S Dai
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China.,CSIRO Astronomy and Space Science, Epping, New South Wales, Australia.,Western Sydney University, Penrith, New South Wales, Australia
| | - V Gajjar
- Department of Astronomy, University of California Berkeley, Berkeley, CA, USA
| | - G Hobbs
- CSIRO Astronomy and Space Science, Epping, New South Wales, Australia
| | - C Jin
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - M Kramer
- Max-Planck-Institut für Radioastronomie, Bonn, Germany
| | - D R Lorimer
- Department of Physics and Astronomy, West Virginia University, Morgantown, WV, USA.,Center for Gravitational Waves and Cosmology, West Virginia University, Morgantown, WV, USA
| | - C C Miao
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - C H Niu
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - J R Niu
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Z C Pan
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - L Qian
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - L Spitler
- Max-Planck-Institut für Radioastronomie, Bonn, Germany
| | - D Werthimer
- Department of Astronomy, University of California Berkeley, Berkeley, CA, USA
| | - G Q Zhang
- School of Astronomy and Space Science, Nanjing University, Nanjing, China
| | - F Y Wang
- School of Astronomy and Space Science, Nanjing University, Nanjing, China.,Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, Nanjing, China
| | - X Y Xie
- Guizhou Normal University, Guiyang, China
| | - Y L Yue
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - L Zhang
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China.,School of Physics and Technology, Wuhan University, Wuhan, China
| | - Q J Zhi
- Guizhou Normal University, Guiyang, China.,Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing, Guizhou Normal University, Guiyang, China
| | - Y Zhu
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
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10
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Li D, Wang P, Zhu WW, Zhang B, Zhang XX, Duan R, Zhang YK, Feng Y, Tang NY, Chatterjee S, Cordes JM, Cruces M, Dai S, Gajjar V, Hobbs G, Jin C, Kramer M, Lorimer DR, Miao CC, Niu CH, Niu JR, Pan ZC, Qian L, Spitler L, Werthimer D, Zhang GQ, Wang FY, Xie XY, Yue YL, Zhang L, Zhi QJ, Zhu Y. A bimodal burst energy distribution of a repeating fast radio burst source. Nature 2021; 598:267-271. [PMID: 34645999 DOI: 10.1038/s41586-021-03878-5] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 08/05/2021] [Indexed: 11/09/2022]
Abstract
The event rate, energy distribution and time-domain behaviour of repeating fast radio bursts (FRBs) contain essential information regarding their physical nature and central engine, which are as yet unknown1,2. As the first precisely localized source, FRB 121102 (refs. 3-5) has been extensively observed and shows non-Poisson clustering of bursts over time and a power-law energy distribution6-8. However, the extent of the energy distribution towards the fainter end was not known. Here we report the detection of 1,652 independent bursts with a peak burst rate of 122 h-1, in 59.5 hours spanning 47 days. A peak in the isotropic equivalent energy distribution is found to be approximately 4.8 × 1037 erg at 1.25 GHz, below which the detection of bursts is suppressed. The burst energy distribution is bimodal, and well characterized by a combination of a log-normal function and a generalized Cauchy function. The large number of bursts in hour-long spans allows sensitive periodicity searches between 1 ms and 1,000 s. The non-detection of any periodicity or quasi-periodicity poses challenges for models involving a single rotating compact object. The high burst rate also implies that FRBs must be generated with a high radiative efficiency, disfavouring emission mechanisms with large energy requirements or contrived triggering conditions.
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Affiliation(s)
- D Li
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China. .,University of Chinese Academy of Sciences, Beijing, China.
| | - P Wang
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - W W Zhu
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - B Zhang
- Department of Physics and Astronomy, University of Nevada, Las Vegas, Las Vegas, NV, USA.
| | - X X Zhang
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - R Duan
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - Y K Zhang
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Y Feng
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China.,CSIRO Astronomy and Space Science, Epping, New South Wales, Australia
| | - N Y Tang
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China.,Department of Physics, Anhui Normal University, Wuhu, China
| | - S Chatterjee
- Cornell Center for Astrophysics and Planetary Science and Department of Astronomy, Cornell University, Ithaca, NY, USA
| | - J M Cordes
- Cornell Center for Astrophysics and Planetary Science and Department of Astronomy, Cornell University, Ithaca, NY, USA
| | - M Cruces
- Max-Planck-Institut für Radioastronomie, Bonn, Germany
| | - S Dai
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China.,CSIRO Astronomy and Space Science, Epping, New South Wales, Australia.,Western Sydney University, Penrith, New South Wales, Australia
| | - V Gajjar
- Department of Astronomy, University of California Berkeley, Berkeley, CA, USA
| | - G Hobbs
- CSIRO Astronomy and Space Science, Epping, New South Wales, Australia
| | - C Jin
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - M Kramer
- Max-Planck-Institut für Radioastronomie, Bonn, Germany
| | - D R Lorimer
- Department of Physics and Astronomy, West Virginia University, Morgantown, WV, USA.,Center for Gravitational Waves and Cosmology, West Virginia University, Morgantown, WV, USA
| | - C C Miao
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - C H Niu
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - J R Niu
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Z C Pan
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - L Qian
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - L Spitler
- Max-Planck-Institut für Radioastronomie, Bonn, Germany
| | - D Werthimer
- Department of Astronomy, University of California Berkeley, Berkeley, CA, USA
| | - G Q Zhang
- School of Astronomy and Space Science, Nanjing University, Nanjing, China
| | - F Y Wang
- School of Astronomy and Space Science, Nanjing University, Nanjing, China.,Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, Nanjing, China
| | - X Y Xie
- Guizhou Normal University, Guiyang, China
| | - Y L Yue
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - L Zhang
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China.,School of Physics and Technology, Wuhan University, Wuhan, China
| | - Q J Zhi
- Guizhou Normal University, Guiyang, China.,Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing, Guizhou Normal University, Guiyang, China
| | - Y Zhu
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
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11
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Wu D, Qian L, Zhu PF. A novel micro-tensile system for full-field deformation measurement of thin films. Rev Sci Instrum 2021; 92:093901. [PMID: 34598515 DOI: 10.1063/5.0055229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 08/16/2021] [Indexed: 06/13/2023]
Abstract
We propose a novel micro-tensile system fit for mechanical property characterization of low-dimensional materials. The micro-tensile system was integrated with a micro-tensile apparatus driven by a piezoelectric transducer (PZT) and an optical microscope. The displacement provided by the PZT actuator was amplified by a lever structure on the micro-tensile apparatus. A stalloy was designed to transmit the displacement and reduce the mechanical resistance to the PZT actuator. Quantitative analysis was conducted for the designed apparatus. A calibration experiment was performed based on the micro-scale digital image correlation under the optical microscope. To validate the feasibility, the PET film specimen with a V-notch was tested by the proposed system. The results indicate that the proposed micro-tensile system is reliable and powerful.
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Affiliation(s)
- D Wu
- Key Laboratory of Impact and Safety Engineering, Ministry of Education, School of Mechanical Engineering and Mechanics, Ningbo University, Ningbo, Zhejiang 315211, China
| | - L Qian
- Key Laboratory of Impact and Safety Engineering, Ministry of Education, School of Mechanical Engineering and Mechanics, Ningbo University, Ningbo, Zhejiang 315211, China
| | - P F Zhu
- Key Laboratory of Impact and Safety Engineering, Ministry of Education, School of Mechanical Engineering and Mechanics, Ningbo University, Ningbo, Zhejiang 315211, China
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12
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Qian L, Jingjing J, Jiaqi G, Yanping W, Genshan M, Yuyu Y. Protective role of serpina3c as a novel thrombin inhibitor against atherosclerosis in mice. Atherosclerosis 2021. [DOI: 10.1016/j.atherosclerosis.2021.06.186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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13
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Amenomori M, Bao YW, Bi XJ, Chen D, Chen TL, Chen WY, Chen X, Chen Y, Cui SW, Ding LK, Fang JH, Fang K, Feng CF, Feng Z, Feng ZY, Gao Q, Gomi A, Gou QB, Guo YQ, Guo YY, He HH, He ZT, Hibino K, Hotta N, Hu H, Hu HB, Huang J, Jia HY, Jiang L, Jiang P, Jin HB, Kasahara K, Katayose Y, Kato C, Kato S, Kawata K, Kozai M, Kurashige D, Le GM, Li AF, Li HJ, Li WJ, Li Y, Lin YH, Liu B, Liu C, Liu JS, Liu LY, Liu MY, Liu W, Liu XL, Lou YQ, Lu H, Meng XR, Munakata K, Nakada H, Nakamura Y, Nakazawa Y, Nanjo H, Ning CC, Nishizawa M, Ohnishi M, Ohura T, Okukawa S, Ozawa S, Qian L, Qian X, Qian XL, Qu XB, Saito T, Sakata M, Sako T, Sako TK, Shao J, Shibata M, Shiomi A, Sugimoto H, Takano W, Takita M, Tan YH, Tateyama N, Torii S, Tsuchiya H, Udo S, Wang H, Wang YP, Wu HR, Wu Q, Xu JL, Xue L, Yamamoto Y, Yang Z, Yao YQ, Yin J, Yokoe Y, Yu NP, Yuan AF, Zhai LM, Zhang CP, Zhang HM, Zhang JL, Zhang X, Zhang XY, Zhang Y, Zhang Y, Zhang Y, Zhao SP, Zhou XX. Gamma-Ray Observation of the Cygnus Region in the 100-TeV Energy Region. Phys Rev Lett 2021; 127:031102. [PMID: 34328784 DOI: 10.1103/physrevlett.127.031102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 04/30/2021] [Accepted: 06/15/2021] [Indexed: 06/13/2023]
Abstract
We report observations of gamma-ray emissions with energies in the 100-TeV energy region from the Cygnus region in our Galaxy. Two sources are significantly detected in the directions of the Cygnus OB1 and OB2 associations. Based on their positional coincidences, we associate one with a pulsar PSR J2032+4127 and the other mainly with a pulsar wind nebula PWN G75.2+0.1, with the pulsar moving away from its original birthplace situated around the centroid of the observed gamma-ray emission. This work would stimulate further studies of particle acceleration mechanisms at these gamma-ray sources.
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Affiliation(s)
- M Amenomori
- Department of Physics, Hirosaki University, Hirosaki 036-8561, Japan
| | - Y W Bao
- School of Astronomy and Space Science, Nanjing University, Nanjing 210093, China
| | - X J Bi
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - D Chen
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
| | - T L Chen
- Department of Mathematics and Physics, Tibet University, Lhasa 850000, China
| | - W Y Chen
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Xu Chen
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Y Chen
- School of Astronomy and Space Science, Nanjing University, Nanjing 210093, China
| | - S W Cui
- Department of Physics, Hebei Normal University, Shijiazhuang 050016, China
| | - L K Ding
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - J H Fang
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - K Fang
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - C F Feng
- Institute of Frontier and Interdisciplinary Science and Key Laboratory of Particle Physics and Particle Irradiation (MOE), Shandong University, Qingdao 266237, China
| | - Zhaoyang Feng
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Z Y Feng
- Institute of Modern Physics, SouthWest Jiaotong University, Chengdu 610031, China
| | - Qi Gao
- Department of Mathematics and Physics, Tibet University, Lhasa 850000, China
| | - A Gomi
- Faculty of Engineering, Yokohama National University, Yokohama 240-8501, Japan
| | - Q B Gou
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Y Q Guo
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Y Y Guo
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - H H He
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Z T He
- Department of Physics, Hebei Normal University, Shijiazhuang 050016, China
| | - K Hibino
- Faculty of Engineering, Kanagawa University, Yokohama 221-8686, Japan
| | - N Hotta
- Faculty of Education, Utsunomiya University, Utsunomiya 321-8505, Japan
| | - Haibing Hu
- Department of Mathematics and Physics, Tibet University, Lhasa 850000, China
| | - H B Hu
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - J Huang
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - H Y Jia
- Institute of Modern Physics, SouthWest Jiaotong University, Chengdu 610031, China
| | - L Jiang
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - P Jiang
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
| | - H B Jin
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
| | - K Kasahara
- Faculty of Systems Engineering, Shibaura Institute of Technology, Omiya 330-8570, Japan
| | - Y Katayose
- Faculty of Engineering, Yokohama National University, Yokohama 240-8501, Japan
| | - C Kato
- Department of Physics, Shinshu University, Matsumoto 390-8621, Japan
| | - S Kato
- Institute for Cosmic Ray Research, University of Tokyo, Kashiwa 277-8582, Japan
| | - K Kawata
- Institute for Cosmic Ray Research, University of Tokyo, Kashiwa 277-8582, Japan
| | - M Kozai
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS/JAXA), Sagamihara 252-5210, Japan
| | - D Kurashige
- Faculty of Engineering, Yokohama National University, Yokohama 240-8501, Japan
| | - G M Le
- National Center for Space Weather, China Meteorological Administration, Beijing 100081, China
| | - A F Li
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
- Institute of Frontier and Interdisciplinary Science and Key Laboratory of Particle Physics and Particle Irradiation (MOE), Shandong University, Qingdao 266237, China
- School of Information Science and Engineering, Shandong Agriculture University, Taian 271018, China
| | - H J Li
- Department of Mathematics and Physics, Tibet University, Lhasa 850000, China
| | - W J Li
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
- Institute of Modern Physics, SouthWest Jiaotong University, Chengdu 610031, China
| | - Y Li
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
| | - Y H Lin
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - B Liu
- Department of Astronomy, School of Physical Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - C Liu
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - J S Liu
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - L Y Liu
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
| | - M Y Liu
- Department of Mathematics and Physics, Tibet University, Lhasa 850000, China
| | - W Liu
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - X L Liu
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
| | - Y-Q Lou
- Department of Physics and Tsinghua Centre for Astrophysics (THCA), Tsinghua University, Beijing 100084, China
- Tsinghua University-National Astronomical Observatories of China (NAOC) Joint Research Center for Astrophysics, Tsinghua University, Beijing 100084, China
- Department of Astronomy, Tsinghua University, Beijing 100084, China
| | - H Lu
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - X R Meng
- Department of Mathematics and Physics, Tibet University, Lhasa 850000, China
| | - K Munakata
- Department of Physics, Shinshu University, Matsumoto 390-8621, Japan
| | - H Nakada
- Faculty of Engineering, Yokohama National University, Yokohama 240-8501, Japan
| | - Y Nakamura
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
- Institute for Cosmic Ray Research, University of Tokyo, Kashiwa 277-8582, Japan
| | - Y Nakazawa
- College of Industrial Technology, Nihon University, Narashino 275-8575, Japan
| | - H Nanjo
- Department of Physics, Hirosaki University, Hirosaki 036-8561, Japan
| | - C C Ning
- Department of Mathematics and Physics, Tibet University, Lhasa 850000, China
| | - M Nishizawa
- National Institute of Informatics, Tokyo 101-8430, Japan
| | - M Ohnishi
- Institute for Cosmic Ray Research, University of Tokyo, Kashiwa 277-8582, Japan
| | - T Ohura
- Faculty of Engineering, Yokohama National University, Yokohama 240-8501, Japan
| | - S Okukawa
- Faculty of Engineering, Yokohama National University, Yokohama 240-8501, Japan
| | - S Ozawa
- National Institute of Information and Communications Technology, Tokyo 184-8795, Japan
| | - L Qian
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
| | - X Qian
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
| | - X L Qian
- Department of Mechanical and Electrical Engineering, Shangdong Management University, Jinan 250357, China
| | - X B Qu
- College of Science, China University of Petroleum, Qingdao 266555, China
| | - T Saito
- Tokyo Metropolitan College of Industrial Technology, Tokyo 116-8523, Japan
| | - M Sakata
- Department of Physics, Konan University, Kobe 658-8501, Japan
| | - T Sako
- Institute for Cosmic Ray Research, University of Tokyo, Kashiwa 277-8582, Japan
| | - T K Sako
- Institute for Cosmic Ray Research, University of Tokyo, Kashiwa 277-8582, Japan
| | - J Shao
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
- Institute of Frontier and Interdisciplinary Science and Key Laboratory of Particle Physics and Particle Irradiation (MOE), Shandong University, Qingdao 266237, China
| | - M Shibata
- Faculty of Engineering, Yokohama National University, Yokohama 240-8501, Japan
| | - A Shiomi
- College of Industrial Technology, Nihon University, Narashino 275-8575, Japan
| | - H Sugimoto
- Shonan Institute of Technology, Fujisawa 251-8511, Japan
| | - W Takano
- Faculty of Engineering, Kanagawa University, Yokohama 221-8686, Japan
| | - M Takita
- Institute for Cosmic Ray Research, University of Tokyo, Kashiwa 277-8582, Japan
| | - Y H Tan
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - N Tateyama
- Faculty of Engineering, Kanagawa University, Yokohama 221-8686, Japan
| | - S Torii
- Research Institute for Science and Engineering, Waseda University, Tokyo 162-0044, Japan
| | - H Tsuchiya
- Japan Atomic Energy Agency, Tokai-mura 319-1195, Japan
| | - S Udo
- Faculty of Engineering, Kanagawa University, Yokohama 221-8686, Japan
| | - H Wang
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Y P Wang
- Department of Mathematics and Physics, Tibet University, Lhasa 850000, China
| | - H R Wu
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Q Wu
- Department of Mathematics and Physics, Tibet University, Lhasa 850000, China
| | - J L Xu
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
| | - L Xue
- Institute of Frontier and Interdisciplinary Science and Key Laboratory of Particle Physics and Particle Irradiation (MOE), Shandong University, Qingdao 266237, China
| | - Y Yamamoto
- Department of Physics, Konan University, Kobe 658-8501, Japan
| | - Z Yang
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Y Q Yao
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
| | - J Yin
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
| | - Y Yokoe
- Institute for Cosmic Ray Research, University of Tokyo, Kashiwa 277-8582, Japan
| | - N P Yu
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
| | - A F Yuan
- Department of Mathematics and Physics, Tibet University, Lhasa 850000, China
| | - L M Zhai
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
| | - C P Zhang
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
| | - H M Zhang
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - J L Zhang
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - X Zhang
- School of Astronomy and Space Science, Nanjing University, Nanjing 210093, China
| | - X Y Zhang
- Institute of Frontier and Interdisciplinary Science and Key Laboratory of Particle Physics and Particle Irradiation (MOE), Shandong University, Qingdao 266237, China
| | - Y Zhang
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Yi Zhang
- Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210034, China
| | - Ying Zhang
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - S P Zhao
- Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - X X Zhou
- Institute of Modern Physics, SouthWest Jiaotong University, Chengdu 610031, China
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14
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Wang W, Zhang W, Zhang Y, Gan Y, Qian L, Zhou D. CIRCULATING TUMOR DNA BY HIGH‐THROUGHPUT SEQUENCING OF T CELL RECEPTOR MONITORED TREATMENT RESPONSE AND PREDICTED TREATMENT FAILURE IN T CELL LYMPHOMAS. Hematol Oncol 2021. [DOI: 10.1002/hon.136_2880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- W Wang
- peking union medical college hospital, hematology Beijing China
| | - W Zhang
- peking union medical college hospital, hematology Beijing China
| | - Y Zhang
- peking union medical college hospital, hematology Beijing China
| | - Y Gan
- peking union medical college hospital, hematology Beijing China
| | - L Qian
- peking union medical college hospital, hematology Beijing China
| | - D Zhou
- peking union medical college hospital, hematology Beijing China
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15
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Tao Z, Qiu J, Zhang Y, Qian L, Gao J, Zhou Y, Yang L, He J, Yang J, Wang R, Huang Y, Zhou L, Sun B, Cui Y. Chemoradiotherapy alone or in combination with Endostar for patients with advanced non-small cell lung cancer: A systematic review and meta-analysis. INT J RADIAT RES 2021. [DOI: 10.29252/ijrr.19.1.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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16
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Li S, Zhou L, Chen R, Chen Y, Niu Z, Qian L, Fang Y, Xu L, Xu H, Zhang L. Diagnostic efficacy of contrast-enhanced ultrasound versus MRI Liver Imaging Reporting and Data System (LI-RADS) for categorising hepatic observations in patients at risk of hepatocellular carcinoma. Clin Radiol 2020; 76:161.e1-161.e10. [PMID: 33198943 DOI: 10.1016/j.crad.2020.10.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 10/08/2020] [Indexed: 12/12/2022]
Abstract
AIM To investigate the diagnostic efficacy of the contrast-enhanced ultrasound Liver Imaging Reporting and Data System (CEUS LI-RADS) for categorising hepatic observations in patients at risk of hepatocellular carcinoma (HCC) compared with magnetic resonance imaging (MRI) LI-RADS. MATERIALS AND METHODS CEUS and MRI data were analysed retrospectively according to the LI-RADS scheme. Follow-up results and pathological findings served as the reference standard. Receiver operating characteristic (ROC) curve analysis was used to reveal the area under the curve (AUC). The sensitivity, specificity, accuracy, and positive (PPV) and negative predictive values (NPV) of LR-5 for determining HCC were calculated. The intra-observer agreement of CEUS LI-RADS was also evaluated. RESULTS Eighty-four patients with 86 liver observations were enrolled. Forty-two observations were classified as LR-5 by CEUS and MRI, respectively. Based on the reference standard, 53 nodules were HCC. The AUCs were 0.876 for CEUS and 0.873 for MRI, without a significant difference (Z=0.050, p=0.960). The sensitivity, specificity, PPV, NPV, and accuracy of LR-5 was 75.47%, 93.94%, 95.24%, 70.45%, 82.56% with CEUS and 73.58%, 90.9%, 92.86%, 68.18%, 80.23% with MRI, respectively. There was a significant difference in specificity between CEUS and MRI (p=0.006). There was almost perfect agreement for arterial phase hyperenhancement (k=0.870), substantial agreement for washout (k=0.765) and CEUS LI-RADS category (k=0.787). CONCLUSION The CEUS LI-RADS scheme is an effective diagnostic tool for HCC with substantial intra-observer reliability. The diagnostic performance of CEUS LI-RADS for determining HCC was comparable to MRI LI-RADS, and the specificity of CEUS LR-5 was significantly higher.
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Affiliation(s)
- S Li
- Department of Ultrasound, Sir Run Run Shaw Hospital, Zhejiang University, School of Medicine, Hangzhou, China
| | - L Zhou
- Department of Ultrasound, Sir Run Run Shaw Hospital, Zhejiang University, School of Medicine, Hangzhou, China
| | - R Chen
- Department of Radiology, Sir Run Run Shaw Hospital, Zhejiang University, School of Medicine, Hangzhou, China
| | - Y Chen
- Department of Ultrasound, Sir Run Run Shaw Hospital, Zhejiang University, School of Medicine, Hangzhou, China
| | - Z Niu
- Department of Radiology, Sir Run Run Shaw Hospital, Zhejiang University, School of Medicine, Hangzhou, China
| | - L Qian
- Department of Radiology, Sir Run Run Shaw Hospital, Zhejiang University, School of Medicine, Hangzhou, China
| | - Y Fang
- Department of Oncology, Sir Run Run Shaw Hospital, Zhejiang University, School of Medicine, Hangzhou, China
| | - L Xu
- Department of Ultrasound, Sir Run Run Shaw Hospital, Zhejiang University, School of Medicine, Hangzhou, China
| | - H Xu
- Department of Ultrasound, Sir Run Run Shaw Hospital, Zhejiang University, School of Medicine, Hangzhou, China
| | - L Zhang
- Department of Ultrasound, Affiliated Hangzhou First People's Hospital, Zhejiang University, School of Medicine, Hangzhou, China.
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Cui Y, Huo Y, Li X, Yang G, Huang Z, Zhao X, Qi L, Deng H, Zheng S, An P, Sun X, Li H, Wu X, Qian L. Tafolecimab, a novel potential long-acting PCSK9 monoclonal antibody: efficacy and safety in healthy and hypercholesterolemia subjects. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.3327] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
LDL cholesterol (LDL-C) is a well-established risk factor for cardiovascular disease. PCSK9 binds LDL receptors, targeting them for degradation. The dosing intervals for currently available PCSK9 monoclonal antibodies are once every 2 or 4 weeks. Tafolecimab, a novel recombinant human PCSK9 monoclonal antibody, was found to have higher affinity with PCSK9 and show longer LDL-C reduction compared to evolocumab in preclinical studies.
Purposes
The objectives for the SAD and MAD studies were to investigate the safety and efficacy of tafolecimab and explore the optimal dosing schedule.
Methods
The phase 1 study was a randomized, placebo-controlled, double-blind, single-ascending dose study (SAD) in Chinese healthy subjects, who were randomized 3:1 to tafolecimab and placebo (n=58). SAD subjects received tafolecimab subcutaneously at 25/75/150/300/450/600mg, or intravenously at 75/450mg, monitored up to day 84. The phase 2 study was a randomized, double-blind, placebo-controlled, repeated-dosing, multiple ascending dose (MAD) study in patients with hypercholesterolemia, who were randomized 4:1 to tafolecimab and placebo (n=60). MAD subjects received tafolecimab subcutaneously at 75/140mg every 2 weeks, 300/420mg every 4weeks, 450/600mg every 6 weeks up to day 84 or 98 with 3 months follow-up.
Results
In the SAD, the maximum mean reduction in LDL-C ranged from 52.2% to 72.1% and was achieved as early as 5 days (figure 1a). The duration of LDL-C reduction was tafolecimab dose dependent. In the MAD, the mean LDL-C concentrations were reduced by tafolecimab for each dose at 12 weeks relative to baseline (ranging from 54.30% to 72.26%; p<0.001). Particularly, a 56.52% (−72.50%, −40.54%) reduction of LDL-C was observed in the cohort of 600mg Q6W. The effect sustained till week 14 (8 weeks after the last dose) where there was still a 43.46% (−60.96%, −25.96%) reduction from baseline (figure 1b). The mean reduction of Lp(a) at week 12 ranged from 24.04% to 50.59% relative to baseline. Tafolecimab reduced the other lipids when comparing with placebo. The pharmacokinetics/pharmadynamics (LDL-C) profiles of tafolecimab were well characterised and support the potential dosing interval of 6–8 weeks subcutaneously.
Both healthy and hypercholesterolemia subjects are generally tolerable to tafolecimab. Reported treatment-emergent adverse events (TEAEs) were: tafolecimab 23 (52.3%) vs. placebo 8 (57.1%); tafolecimab 34 (70.8%) vs. placebo 9 (75.0%) in the SAD and MAD respectively. There were no serious TEAEs or events leading to death or treatment discontinuation in both SAD and MAD.
Conclusions
Tafolecimab was well tolerated in both healthy and hypercholesterolemia in Chinese subjects, and improved lipid profile including LDL-C, Lp(a) and other lipids. The sustained effects on LDL-C suggests the potential of tafolecimab as a long-lasting PCSK9 inhibitor with dosing interval of 6–8 weeks or beyond.
Figure 1. LDL-C: Percent change from baseline
Funding Acknowledgement
Type of funding source: Private company. Main funding source(s): Innovent Biologics (Suzhou), China
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Affiliation(s)
- Y Cui
- Peking University First Hospital, Department of pharmacy, Beijing, China
| | - Y Huo
- Peking University First Hospital, Department of cardiology, Beijing, China
| | - X Li
- The third hospital of Changsha, Department of pharmacy, Changsha, China
| | - G Yang
- The third Xiangya hospital of Central South University, School of pharmaceutical science, Changsha, China
| | - Z Huang
- The third Xiangya hospital of Central South University, Clinical trial research center, Changsha, China
| | - X Zhao
- Peking University First Hospital, Department of pharmacy, Beijing, China
| | - L Qi
- Peking University First Hospital, Department of cardiology, Beijing, China
| | - H Deng
- Innovent Biologics (Suzhou), Suzhou, China
| | - S Zheng
- Innovent Biologics (Suzhou), Suzhou, China
| | - P An
- Innovent Biologics (Suzhou), Suzhou, China
| | - X Sun
- Innovent Biologics (Suzhou), Suzhou, China
| | - H Li
- Innovent Biologics (Suzhou), Suzhou, China
| | - X Wu
- Innovent Biologics (Suzhou), Suzhou, China
| | - L Qian
- Innovent Biologics (Suzhou), Suzhou, China
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El Kadi S, Qian L, Zeng P, Lof J, Stolze E, Xie F, Kamp O, Van Rossum A, Porter T. Efficacy of sonothrombolysis using acoustically activated perflutren nanodroplets versus perflutren microbubbles. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Background
The use of intermittent high mechanical index (HMI) ultrasound impulses in combination with intravenously administered microbubbles (MB) has been shown to dissolve arterial and microvascular thrombi. The recent development of liquid droplets with nanoscale diameter from commercially available microbubbles may optimize thrombus permeation and subsequent thrombus dissolution.
Methods
Thrombi were formed from fresh porcine arterial whole blood mixed with thrombin, and placed in a vascular system mimicking branching epicardial coronary circulation (Figure 1A) at 37 Celsius and flow rate. A diagnostic ultrasound system with a tissue mimicking phantom was placed on top of the thrombus to simulate transthoracic echocardiography. Thrombus treatment consisted of a 10-minute infusion of either diluted nanodroplets (ND) or MB (same concentration) with intermittent HMI fundamental multipulse (3 usec pulse duration; FUS) or single pulse harmonic (HUS) impulses. All treatments were randomized and compared with HMI impulses alone. Efficacy was evaluated by percentage thrombus dissolution (%TD). Transmission electron microscopy (TEM) of residual thrombi after treatment was performed to examine for droplet permeation and resultant formed microbubble size.
Results
A relatively monodisperse nanodroplets size distribution was formed from microbubble cooled compression (mean diameter was 147±54 nm). A total of 60 porcine arterial thrombi were tested, 20 in each MB and ND treated group (20 control). Overall, there was a significant difference in %TD between ND treated thrombi (combining HUS and FUS HMI treated groups) versus MB treated thrombi and control (p<0.0001 and p=0.02, respectively; ANOVA, Figure 1B). The highest %TD was seen in the FUS HMI treated ND group (mean 51±17%; Figure 1B). TEM of the DND treated group demonstrated significant expansion (diameters of 6 microns; Figure 1 C) of acoustically activated droplets embedded within the thrombi.
Conclusion
ND in combination with intermittent HMI ultrasound resulted in significantly greater thrombolysis compared to MB. In-vivo studies on nanodroplet mediated sonothrombolysis for vascular and microvascular thrombi should be performed with this modification of a commercially available microbubble.
Figure 1
Funding Acknowledgement
Type of funding source: Foundation. Main funding source(s): Theodore F. Hubbard Foundation
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Affiliation(s)
- S El Kadi
- Amsterdam UMC - Location VUmc, Amsterdam, Netherlands (The)
| | - L Qian
- The First Affiliated Hospital of Nanjing Medical University, Cardiology, Nanjing, China
| | - P Zeng
- University of Nebraska Medical Center, Cardiology, Omaha, United States of America
| | - J Lof
- University of Nebraska Medical Center, Cardiology, Omaha, United States of America
| | - E Stolze
- University of Nebraska Medical Center, Cardiology, Omaha, United States of America
| | - F Xie
- University of Nebraska Medical Center, Cardiology, Omaha, United States of America
| | - O Kamp
- Amsterdam UMC - Location VUmc, Amsterdam, Netherlands (The)
| | - A.C Van Rossum
- Amsterdam UMC - Location VUmc, Amsterdam, Netherlands (The)
| | - T.R Porter
- University of Nebraska Medical Center, Cardiology, Omaha, United States of America
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Bian Y, Xie X, Shen J, Yao M, Dong X, Qian L, Qu Y. 1658P The landscape of NTRK fusions in Chinese sarcoma patients. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.1884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Koster K, Largen A, Qian L, Sen-Crowe B, Douglas J. Mycobacterium tuberculosis lineages in Hawaii demonstrate distinctive demographic and migration characteristics. Public Health 2020; 182:13-18. [DOI: 10.1016/j.puhe.2020.01.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 12/20/2019] [Accepted: 01/11/2020] [Indexed: 10/24/2022]
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Chen H, Qian L, Jiang M, Du Q, Yuan F, Feng W. Performance of IOTA ADNEX model in evaluating adnexal masses in a gynecological oncology center in China. Ultrasound Obstet Gynecol 2019; 54:815-822. [PMID: 31152572 DOI: 10.1002/uog.20363] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 05/21/2019] [Accepted: 05/23/2019] [Indexed: 06/09/2023]
Abstract
OBJECTIVE To evaluate the diagnostic accuracy of the International Ovarian Tumor Analysis (IOTA) Assessment of Different NEoplasias in the adneXa (ADNEX) model in the preoperative diagnosis of adnexal masses using data from a gynecological oncology center in China. METHODS This was a single-center, retrospective diagnostic accuracy study based on ultrasound data collected prospectively, between May and December 2017, from 278 patients with at least one adnexal (ovarian, paraovarian or tubal) mass. Clinical and pathologic information, serum CA 125 level and ultrasonographic findings were collected. All patients underwent surgery and the histopathological diagnosis was used as reference standard. The final diagnosis was classified into five tumor types according to the ADNEX model: benign ovarian tumor, borderline ovarian tumor (BOT), Stage-I ovarian cancer (OC), Stages-II-IV OC and ovarian metastasis. Receiver-operating characteristics (ROC) curve analysis was used to evaluate the diagnostic accuracy of the ADNEX model, with and without inclusion of CA 125 level in the model. RESULTS Of the 278 women included, 203 (73.0%) had a benign ovarian tumor and 75 (27.0%) had a malignant ovarian tumor, including 18 (6.5%) with BOT, 17 (6.1%) with Stage-I OC, 32 (11.5%) with Stages-II-IV OC and eight (2.9%) with ovarian metastasis. The performance of the IOTA ADNEX model was good for discriminating between benign and malignant tumors, with an area under the ROC curve (AUC) of 0.94 (95% CI, 0.91-0.97) when CA 125 was included in the model and AUC of 0.93 (95% CI, 0.90-0.96) without CA 125. The AUC values of the model including CA 125 ranged between 0.61 and 0.99 for distinguishing between the different types of tumor, and it showed excellent performance in discriminating between a benign ovarian tumor and Stages-II-IV OC, with an AUC of 0.99 (95% CI, 0.97-1.00). The performance of the model was less effective at distinguishing between BOT and Stage-I OC and between Stages-II-IV OC and ovarian metastasis, with AUC values of 0.61 (95% CI, 0.43-0.77) and 0.78 (95% CI, 0.62-0.90), respectively. Although inclusion of CA 125 did not alter the performance of the ADNEX model in discriminating between benign and malignant lesions (AUC of 0.94 and 0.93 with and without CA 125 level, respectively; P = 0.54), the inclusion of CA 125 in the model improved its performance in discriminating between Stage-I OC and Stages-II-IV OC (AUC increased from 0.81 to 0.92; P = 0.04) and between Stages-II-IV OC and metastatic cancer (AUC increased from 0.58 to 0.78; P = 0.01). CONCLUSIONS The IOTA ADNEX model showed good to excellent performance in distinguishing between benign and malignant adnexal masses and between the different types of ovarian tumor in a Chinese setting. Based on our findings, the ADNEX model has high value in clinical practice and can aid in the preoperative diagnosis of patients with an adnexal mass. Copyright © 2019 ISUOG. Published by John Wiley & Sons Ltd.
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Affiliation(s)
- H Chen
- Department of Obstetrics and Gynecology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, P.R. China
| | - L Qian
- Department of Obstetrics and Gynecology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, P.R. China
| | - M Jiang
- Department of Obstetrics and Gynecology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, P.R. China
| | - Q Du
- Department of Obstetrics and Gynecology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, P.R. China
| | - F Yuan
- Department of Pathology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, P.R. China
| | - W Feng
- Department of Obstetrics and Gynecology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, P.R. China
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Qian L, Ji AH, Zhang WJ, Zhao N. HuR, TTP, and miR-133b expression in NSCLC and their association with prognosis. Eur Rev Med Pharmacol Sci 2019; 22:430-442. [PMID: 29424924 DOI: 10.26355/eurrev_201801_14192] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE This study sought to explore HuR, Thrombotic Thrombocytopenic Purpura (TTP), and microRNA 133b (miR-133b) expression levels in non-small cell lung cancer (NSCLC) patients and assess the relationship of expression with disease prognosis. PATIENTS AND METHODS One hundred and ten paraffin-embedded and 33 fresh flash-frozen NSCLC samples, together with matched tumor adjacent normal tissue controls, were collected from patients between January 2013 and July 2015 in Yidu Central Hospital of Weifang. Twenty-nine patients provided both paraffin-embedded and fresh frozen tissues. HuR and TTP protein expression levels were measured in 110 paraffin-embedded tumors and matched controls using immunohistochemistry, while miR-133b levels were measured using Real-time fluorescent quantitative PCR. RESULTS Follow-up parameters included treatment response, relapse events, post-relapse treatment, disease free survival (DFS), and overall survival (OS). HuR expression was significantly different between tumor and matched controls (p < 0.0001). Cytoplasmic expression levels of HuR and TTP correlated with pTNM staging (p < 0.05). No significant correlation was observed between HuR and TTP expression and other clinical pathological factors (gender, age, tumor size, pathological subtype, differentiation status, lymph node metastasis, distant metastasis, and tumor invasiveness). MiR-133b expression correlated with tumor size (p = 0.015) and differentiation status (p = 0.013) in paraffin-embedded sections, but was only correlated with pTNM staging (p = 0.032) in frozen tissue samples. No significant difference in DFS nor OS was observed between 68 HuR-positive and 42 HuR-negative patients (DFS, Log Rank p = 0.712; OS, Log Rank p = 0.220). However, DFS and OS were significantly different between miR-133b high-expression and low-expression patients (DFS, Log Rank p = 0.048 < 0.05; OS, Log Rank p = 0.025 < 0.05). This indicates that miR-133b levels may have prognostic value. CONCLUSIONS HuR expression was negatively correlated with TTP expression in NSCLC tissues. MiR-133b levels were downregulated in normal tissues compared to both paraffin and frozen tumor samples, and correlated with both HuR and TTP expression, which may affect the prognosis of NSCLC patients.
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Affiliation(s)
- L Qian
- Department of Thoracic Surgery, Yidu Central Hospital of Weifang, Weifang, Shandong Province, China.
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Qi S, Yang Y, Liu W, Zhang L, Su H, Yang Y, He X, Qu B, Qian L, Hou X, Wang H, Li G, Zhang Y, Qiao X, Zhu Y, Cao J, Wu J, Wu T, Zhu S, Shi M, Xu L, Li Y. TREATMENT BENEFIT ASSOCIATING WITH NON-ANTHRACYCLINE CHEMOTHERAPY IN EXTRANODAL NK/T-CELL LYMPHOMA, NASAL TYPE. Hematol Oncol 2019. [DOI: 10.1002/hon.65_2629] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- S. Qi
- Radiation Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital; Chinese Academy of Medical Scidences and Peking Union Medical College; Beijing China
| | - Y. Yang
- Radiation Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital; Chinese Academy of Medical Scidences and Peking Union Medical College; Beijing China
| | - W. Liu
- Medical Oncology; Peking University Cancer Hospital & Institute; Beijing China
| | - L. Zhang
- Oncology; Union Hospital, Tongji Medical College, Huazhong University of Science and Technology; Wuhan China
| | - H. Su
- Oncology; 307 Hospital, Academy of Military Medical Science; Beijing China
| | - Y. Yang
- Radiation Oncology; Chongqing Cancer Hospital & Cancer Institute; Chongqing China
| | - X. He
- Radiation Oncology; Chongqing Cancer Hospital & Cancer Institute; Chongqing China
| | - B. Qu
- Radiation Oncology; The General Hospital of Chinese People's Liberation Army; Beijing China
| | - L. Qian
- Radiation Oncology; The Affiliated Provincial Hospital of Anhui Medical University; HEFEI China
| | - X. Hou
- Radiation Oncology; Peking Union Medical College Hospital, Chinese Academy of Medical Sciences (CAMS) and Peking Union Medical College (PUMC); Beijing China
| | - H. Wang
- Radiation Oncology; Jiangxi Cancer Hospital; Nanchang China
| | - G. Li
- Radiation Oncology; Beijing Hospital of the Ministry of Health; Beijing China
| | - Y. Zhang
- Radiation Oncolocy, Sun Yat-sen University Cancer Center; State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine; Guangzhou China
| | - X. Qiao
- Radiation Oncology; The Fourth Hospital of Hebei Medical University; Shijiazhuang China
| | - Y. Zhu
- Radiation Oncology; Zhejiang Cancer Hospital; Hangzhou China
| | - J. Cao
- Radiation Oncology; Shanxi Cancer Hospital and the Affiliated Cancer Hospital of Shanxi Medical University; Taiyuan China
| | - J. Wu
- Radiation Oncology; Fujian Provincial Cancer Hospital; Fuzhou China
| | - T. Wu
- Radiation Oncology; Affiliated Hospital of Guizhou Medical University, Guizhou Cancer Hospital; Guiyang China
| | - S. Zhu
- Radiation Oncology; Hunan Cancer Hospital and the Affiliated Cancer Hospital of Xiangya School of Medicine; Changsha China
| | - M. Shi
- Radiation Oncology; Xijing Hospital, Fourth Military Medical University; Xian China
| | - L. Xu
- Radiation Oncology; Tianjin Medical University Cancer Institute & Hospital, Key Laboratory of Cancer Prevention and Therapy, National Clinical Research Center for Cancer; Tianjin China
| | - Y. Li
- Radiation Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital; Chinese Academy of Medical Scidences and Peking Union Medical College; Beijing China
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Qian L, Fei Q, Zhang Y, Guo W, Bian X, Yin L, Yan P, Wang T, Qian P, Guo Z, He X. PO-0746 The utility of functional magnetic resonance imaging in target delineation of high-grade gliomas. Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)31166-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Qian L, Dong YB, Zhao LL, Zhao HJ, Cui JW, Wang NY. Survival prediction with score model based on clinical characteristics in advanced HCC patients receiving oxaliplatin-containing regimens. Neoplasma 2019; 66:301-307. [PMID: 30509107 DOI: 10.4149/neo_2018_180706n448] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Accepted: 10/16/2018] [Indexed: 11/08/2022]
Abstract
A score model based on clinical characteristics in advanced hepatocellular carcinoma (HCC) patients treated with systemic chemotherapy of oxaliplatin-containing regimens was established to evaluate progression-free survival (PFS) and overall survival (OS). Thirty HCC patients eligible for radical resection were involved in the retrospective study, and these were divided into the good response group (complete response (CR)/partial response (PR) and the poor response group (stable disease (SD)/progression disease (PD). The median PFS and OS were compared in the two groups. PFS and OS combined with clinical characteristics were evaluated by univariate and multivariate analyses. The score model was defined with 1 score for each characteristic, and score model cut-off values were determined by the receiver operating characteristic curve (ROC) which describes treatment response. The median PFS was 10 and 2 months (p<0.001), and the median OS was 13 and 4 months (p=0.011) for the CR/PR and SD/PD groups, respectively. The score of 1 was the optimal cutoff value, with sensitivity ranging from 52.6 to 63.2% and specificity from 81.8 to 100% (AUC= 0.773, p=0.014). The median PFS for good and poor response groups was 9 months and 1month (p<0.001) and the median OS was 22 and 3months at p<0.001, respectively. Patients with scores above 1 had poor response, with median 3 months OS and 1 month PFS, and patients with scores of 0 and 1 established good response, with median 22 months OS and 9 months PFS, respectively.
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Affiliation(s)
- L Qian
- Cancer Center, The First Hospital of Jilin University, Changchun, China
| | - Y B Dong
- Cancer Center, The First Hospital of Jilin University, Changchun, China
| | - L L Zhao
- Cancer Center, The First Hospital of Jilin University, Changchun, China
| | - H J Zhao
- Cancer Center, The First Hospital of Jilin University, Changchun, China
| | - J W Cui
- Cancer Center, The First Hospital of Jilin University, Changchun, China
| | - N Y Wang
- Cancer Center, The First Hospital of Jilin University, Changchun, China
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Qian L, Lu L, Huang L, Wen Q, Xie J, Jin W, Li H, Jiang L. The effect of neonatal maternal separation on short-chain fatty acids and airway inflammation in adult asthma mice. Allergol Immunopathol (Madr) 2019; 47:2-11. [PMID: 30458973 DOI: 10.1016/j.aller.2018.05.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 04/23/2018] [Accepted: 05/10/2018] [Indexed: 12/12/2022]
Abstract
BACKGROUND To investigate neonatal maternal separation (NMS) effects on airway inflammation of asthma and potential mechanism using a mouse model. METHODS 80 Balb/c neonatal male mice were randomly assigned to NMS and non-NMS groups. Feces were collected on PND21, 28, 35 and 42 to analyze microbiota and short-chain fatty acids (SCFAs). Non-NMS group were then divided into control (group A) and asthma groups (group B), while NMS group was assigned to NMS+asthma (group C) and NMS+SCFAs+asthma groups (group D). Inflammatory cells and eosinophils (EOS) in bronchoalveolar lavage fluid (BALF) were assessed. Pathological changes and cytokines in lung tissue were observed. Protein expression of Occludin and E-cadherin in airway epithelial was examined. RESULTS The number of S', diversity index H' and dominance index D', as well as content butyric acid in NMS group C were significantly lower than non-NMS group B (p<0.05). Mice in group C had a higher level of inflammatory cells and EOS compared with group A, B and D. EOS moderate infiltration was found in mice of group B, C and D. Mice in group C had significantly higher levels of cytokines and showed slightly increased bronchial epithelium goblet cells and a small amount of visceral secretions. Occludin and E-cadherin expression in lung in B, C and D groups was depressed, and protein level in group C was significantly lower than group B and D. CONCLUSIONS NMS is associated with exacerbated inflammation of adult asthma by changing intestinal microflora resulting in butanoic acid decline and airway epithelial barrier damage.
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Li W, Bai R, Qian L, Chen N, Zhao Y, Han F, Bai L, Li J, Yu Y, Cui J. P044 Cost-Effectiveness Analysis of Icotinib vs Whole-Brain Irradiation in NSCLC Patients with Brain Metastases. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.10.067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Li W, Qian L, Li W, Chen X, He H, Tian H, Zhao Y, Wang X, Cui J. P043 Cost-Effectiveness Analysis of Different Sequences of Osimertinib Administration for EGFR-Mutated Non-Small-Cell Lung Cancer. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.10.066] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Qian L, Chu MING, Zhang YANJ. P842Speckle tracking imaging assesses the effect of Qili Qiangxin capsule on rat doxorubicin-induced cardiomyopathy. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy564.p842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- L Qian
- The First Affiliated Hospital of Nanjing Medical University, Cardiology, Nanjing, China People's Republic of
| | - M I N G Chu
- The First Affiliated Hospital of Nanjing Medical University, Cardiology, Nanjing, China People's Republic of
| | - Y A N J Zhang
- The First Affiliated Hospital of Nanjing Medical University, Cardiology, Nanjing, China People's Republic of
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Qian L, Chu MING. P841Speckle tracking echocardiography for the efficacy and safety assessment of S100A4-shRNA in myocardial infarction. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy564.p841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- L Qian
- The First Affiliated Hospital of Nanjing Medical University, Cardiology, Nanjing, China People's Republic of
| | - M I N G Chu
- The First Affiliated Hospital of Nanjing Medical University, Cardiology, Nanjing, China People's Republic of
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Su F, He E, Qian L, Zhu Z, Wei L, Zeng Z, Qu W, Xu R, Yi Z. Complication Follow-up With Ultrasonographic Analyses of 91 Cases With Donor Gallbladder Preservation in Living Donor Liver Transplantation of Left Lateral Sectionectomies. Transplant Proc 2018; 50:217-221. [PMID: 29407312 DOI: 10.1016/j.transproceed.2017.12.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Revised: 10/22/2017] [Accepted: 12/05/2017] [Indexed: 02/08/2023]
Abstract
BACKGROUND Preserving the donor's gallbladder during living donor liver transplantation (LDLT) is a better method for liver transplantation surgery, but not enough is known about gallbladder complications after the operation. METHODS We retrospectively investigated postsurgical donor gallbladder complications in clinical LDLT with gallbladder preservation. The feasibility of retaining the gallbladder during liver graft procurement is discussed. Ninety-one donors with retained gallbladder after LDLT with the hepatic left lateral sectionectomy (from June 2013 to October 2015) were retrospectively analyzed. Donors were followed for 12.6 to 40.7 months after surgery (median 26.1 months). Sonography was used to evaluate gallbladder characteristics before and after surgery. RESULTS Gallbladder function had recovered to almost normal 1 month after transplantation. Four donors (4.40%) experienced gallbladder enlargement that resolved after 3 days. Thickening of the gallbladder wall in 31 donors (34.07%) was restored within 2 to 75 days. Biliary sludge appeared in 9 donors (9.89%); 6 of them recovered within 3 to 34 days. Three (3.30%) and 1 donor (1.10%) suffered gallstone and gallbladder polyps, respectively, which persisted until the last follow-up. CONCLUSION The rate of postoperative complications of the gallbladder in donors was relative low. Preserving the gallbladder in liver transplantation donors during liver graft procurement is feasible and safe.
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Affiliation(s)
- F Su
- Department of Ultrasound, Beijing Friendship Hospital Affiliated to Capital Medical University, Beijing, China
| | - E He
- Department of Ultrasound, Beijing Friendship Hospital Affiliated to Capital Medical University, Beijing, China
| | - L Qian
- Department of Ultrasound, Beijing Friendship Hospital Affiliated to Capital Medical University, Beijing, China.
| | - Z Zhu
- Department of General Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - L Wei
- Department of General Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Z Zeng
- Department of General Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - W Qu
- Department of General Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - R Xu
- Department of Ultrasound, Beijing Friendship Hospital Affiliated to Capital Medical University, Beijing, China
| | - Z Yi
- Department of Ultrasound, Beijing Friendship Hospital Affiliated to Capital Medical University, Beijing, China
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Qian L, Jiang C, Sun P, Xu D, Wang Y, Fu M, Zhong S, Ouyang J. A comparison of the biomechanical stability of pedicle-lengthening screws and traditional pedicle screws: an in vitro instant and fatigue-resistant pull-out test. Bone Joint J 2018; 100-B:516-521. [PMID: 29629595 DOI: 10.1302/0301-620x.100b4.bjj-2017-0877.r1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Aims The aim of this study was to compare the peak pull-out force (PPF) of pedicle-lengthening screws (PLS) and traditional pedicle screws (TPS) using instant and cyclic fatigue testing. Materials and Methods A total of 60 lumbar vertebrae were divided into six groups: PLS submitted to instant pull-out and fatigue-resistance testing (groups A1 and A2, respectively), TPS submitted to instant pull-out and fatigue-resistance testing (groups B1 and B2, respectively) and PLS augmented with 2 ml polymethylmethacrylate, submitted to instant pull-out and fatigue-resistance testing (groups C1 and C2, respectively). The PPF and normalized PPF (PPFn) for bone mineral density (BMD) were compared within and between all groups. Results In all groups, BMD was significantly correlated with PPF (r = 0.83, p < 0.001). The PPFn in A1 was significantly less than in B1 (p = 0.006) and C1 (p = 0.002). The PPFn of A2 was significantly less than in B2 (p < 0.001) and C2 (p < 0.001). The PPFn in A1, B1, and C1 was significantly greater than in A2 (p = 0.002), B2 (p = 0.027), and C2 (p = 0.003). There were no significant differences in PPFn between B1 and C1, or between B2 and C2. Conclusion Pedicle lengthening screws with cement augmentation can provide the same fixation stability as traditional pedicle screws and may be a viable clinical option. Cite this article: Bone Joint J 2018;100-B:516-21.
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Affiliation(s)
- L Qian
- Department of Anatomy, Southern Medical University, Guangdong Provincial Key Laboratory of Medical Biomechanics, Shenzhen Digital Orthopedic Engineering Laboratory, Guangdong, 510515, China
| | - C Jiang
- Department of Anatomy, Southern Medical University, Guangdong Provincial Key Laboratory of Medical Biomechanics, Shenzhen Digital Orthopedic Engineering Laboratory, Guangdong, 510515, China
| | - P Sun
- Department of Anatomy, Southern Medical University, Guangdong Provincial Key Laboratory of Medical Biomechanics, Shenzhen Digital Orthopedic Engineering Laboratory, Guangdong, 510515, China
| | - D Xu
- Department of Orthopedics, Nanfang Hospital, Southern Medical University
| | - Y Wang
- Department of Anatomy, Southern Medical University, Guangdong Provincial Key Laboratory of Medical Biomechanics, Shenzhen Digital Orthopedic Engineering Laboratory, Guangdong, 510515, China
| | - M Fu
- Department of Anatomy, Southern Medical University, Guangdong Provincial Key Laboratory of Medical Biomechanics, Shenzhen Digital Orthopedic Engineering Laboratory, Guangdong, 510515, China
| | - S Zhong
- Department of Anatomy, Southern Medical University, Guangdong Provincial Key Laboratory of Medical Biomechanics, Shenzhen Digital Orthopedic Engineering Laboratory, Guangdong, 510515, China
| | - J Ouyang
- Department of Anatomy, Southern Medical University, Guangdong Provincial Key Laboratory of Medical Biomechanics, Shenzhen Digital Orthopedic Engineering Laboratory, Satai Road, Guangzhou, P.R.C, China, Guangzhou, China
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Duan C, Qian L, Mitra N, Kanetsky PA. Family History of Melanoma and Lifetime Patterns of Daytime Hours Spent Outdoors in Melanoma-prone Families. Cancer Epidemiol Biomarkers Prev 2018. [DOI: 10.1158/1055-9965.epi-18-0058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Abstract
Longer daytime hours spent outdoors reflect higher ultraviolet radiation exposure, which is a modifiable risk factor of melanoma. Among individuals of melanoma-prone families, we sought to describe lifetime patterns for hours spent outdoors, and to investigate whether having an affected family member with melanoma from an older generation was associated with patterning. Methods: Information on hours spent outdoors on weekdays, weekends, and holidays beginning at age 10 was obtained from individuals from melanoma-prone families. We determined time-weighted average hours outdoors for warmer months, colder months, and the entire year. K-means for longitudinal data was used to identify lifetime patterns. We created a variable to indicate whether there was an existing melanoma in a prior generation of an individual's family. Multinomial logistic regression models were used to examine the association between family history of melanoma and lifetime patterns of daytime hours spent outdoors, adjusting for covariates. Results: We analyzed 2540 individuals from 669 families ascertained across 15 countries, and four lifetime patterns were identified. Three patterns began with moderate hours that (B) decreased slowly (n = 1014); (C) decreased sharply until age 20 and then remained low (n = 572); or (D) increased at age 20 and remained high (n = 173). One pattern, (A) began with few hours that decreased at age 20 then remained very low (n = 781). Compared to individuals with the high (D) pattern, individuals with an existing melanoma in a prior family generation were more likely to have the low (A) pattern (OR = 1.92, 95% CI: 1.34–2.76), the moderate and slowly decreasing (B) pattern (OR = 1.72, 95% CI: 1.15–2.57), or the sharply decreasing (C) pattern (OR = 2.01, 95% CI: 1.40–2.87). Similar associations were observed separately in warmer and colder months. Examining lifetime patterns of hours spent outdoors during holidays, we noticed a stronger relationship with family history of melanoma in warmer months than in colder months. Conclusions: As expected, the diagnosis of a melanoma in a prior generation may impact family members' awareness of UVR exposure leading to reduced daytime hours spent outdoors.
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Liu W, Zhu S, Xu L, Yuan Z, Cao J, Wu J, Wu T, Xiaorong H, Qian L, Zhang F, Zhang Y, Zhu Y, Li Y. Impact of Patient Age on Treatment Choice and Survival Outcome in Early Stage Extranodal Nasal-Type NK/T-Cell Lymphoma. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.1636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Fu M, Ye Q, Jiang C, Qian L, Xu D, Wang Y, Sun P, Ouyang J. The segment-dependent changes in lumbar intervertebral space height during flexion-extension motion. Bone Joint Res 2017; 6:245-252. [PMID: 28450317 PMCID: PMC5415903 DOI: 10.1302/2046-3758.64.bjr-2016-0245.r1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 02/07/2017] [Indexed: 11/09/2022] Open
Abstract
Objectives Many studies have investigated the kinematics of the lumbar spine and the morphological features of the lumbar discs. However, the segment-dependent immediate changes of the lumbar intervertebral space height during flexion-extension motion are still unclear. This study examined the changes of intervertebral space height during flexion-extension motion of lumbar specimens. Methods First, we validated the accuracy and repeatability of a custom-made mechanical loading equipment set-up. Eight lumbar specimens underwent CT scanning in flexion, neural, and extension positions by using the equipment set-up. The changes in the disc height and distance between adjacent two pedicle screw entry points (DASEP) of the posterior approach at different lumbar levels (L3/4, L4/5 and L5/S1) were examined on three-dimensional lumbar models, which were reconstructed from the CT images. Results All the vertebral motion segments (L3/4, L4/5 and L5/S1) had greater changes in disc height and DASEP from neutral to flexion than from neutral to extension. The change in anterior disc height gradually increased from upper to lower levels, from neutral to flexion. The changes in anterior and posterior disc heights were similar at the L4/5 level from neutral to extension, but the changes in anterior disc height were significantly greater than those in posterior disc height at the L3/4 and L5/S1 levels, from neutral to extension. Conclusions The lumbar motion segment showed level-specific changes in disc height and DASEP. The data may be helpful in understanding the physiologic dynamic characteristics of the lumbar spine and in optimising the parameters of lumbar surgical instruments. Cite this article: M. Fu, Q. Ye, C. Jiang, L. Qian, D. Xu, Y. Wang, P. Sun, J. Ouyang. The segment-dependent changes in lumbar intervertebral space height during flexion-extension motion. Bone Joint Res 2017;6:245–252. DOI: 10.1302/2046-3758.64.BJR-2016-0245.R1.
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Affiliation(s)
- M Fu
- Director of Department of Anatomy, Department of Anatomy, Guangdong Provincial Key Laboratory of Medical Biomechanics, Southern Medical University, Baiyun District, Guangzhou, Guangdong, China
| | - Q Ye
- Department of Radiology, The Third Affiliated Hospital of Southern Medical University, Tianhe District, Guangzhou, Guangdong, China
| | - C Jiang
- Director of Department of Anatomy, Department of Anatomy, Guangdong Provincial Key Laboratory of Medical Biomechanics, Southern Medical University, Baiyun District, Guangzhou, Guangdong, China
| | - L Qian
- Director of Department of Anatomy, Department of Anatomy, Guangdong Provincial Key Laboratory of Medical Biomechanics, Southern Medical University, Baiyun District, Guangzhou, Guangdong, China
| | - D Xu
- Director of Department of Anatomy, Department of Anatomy, Guangdong Provincial Key Laboratory of Medical Biomechanics, Southern Medical University, Baiyun District, Guangzhou, Guangdong, China
| | - Y Wang
- Director of Department of Anatomy, Department of Anatomy, Guangdong Provincial Key Laboratory of Medical Biomechanics, Southern Medical University, Baiyun District, Guangzhou, Guangdong, China
| | - P Sun
- Director of Department of Anatomy, Department of Anatomy, Guangdong Provincial Key Laboratory of Medical Biomechanics, Southern Medical University, Baiyun District, Guangzhou, Guangdong, China
| | - J Ouyang
- Director of Department of Anatomy, Department of Anatomy, Guangdong Provincial Key Laboratory of Medical Biomechanics, Southern Medical University, Baiyun District, Guangzhou, Guangdong, China
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Muuri E, Siitari-Kauppi M, Matara-aho M, Ikonen J, Lindberg A, Qian L, Koskinen L. Cesium sorption and diffusion on crystalline rock: Olkiluoto case study. J Radioanal Nucl Chem 2016. [DOI: 10.1007/s10967-016-5087-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Xu L, Qian L, Kang J, Sha S, Xin Y, Lu S, Ma Y. Down-regulation of N-acetylglucosamine-1-phosphate transferase (WecA) enhanced the sensitivity of Mycobacterium smegmatis against rifampin. J Appl Microbiol 2016; 121:966-72. [PMID: 27420559 DOI: 10.1111/jam.13228] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 05/25/2016] [Accepted: 07/04/2016] [Indexed: 11/30/2022]
Abstract
AIMS To construct a conditional N-acetylglucosamine-1-phosphate transferase (WecA) knockdown strain of Mycobacterium smegmatis and to investigate the biological effect of WecA on mycobacterial growth, morphology and susceptibilities against anti-tuberculosis drugs. METHODS AND RESULTS Mycobacterium smegmatis wecA knockdown strain was constructed by using a tetracycline-inducible expression vector pMind and the expression of WecA was regulated by antisense RNA. The results of growth curves and the colony formation unit curves showed that the growth rate of WecA down-regulation strain was decreased and the amount of live bacterial cells dropped. In addition, the wecA knockdown strain exhibited dramatically morphological alterations through scanning electron microscopy observation. The susceptibility of WecA low-expression strain to anti-tuberculosis drugs was detected by using a rapid resazurin microtitre assay as well as a traditional agar dilution method. Notably, the wecA knockdown strain was more sensitive to rifampin, compared with the wecA normal-expression strain. In addition, the sensitivity of wild type Myco. smegmatis mc(2) 155 strain against rifampin was also enhanced in the presence of a low concentration of tunicamycin, a natural WecA inhibitor. CONCLUSIONS Down-regulation of WecA enhanced the sensitivity of Myco. smegmatis against rifampin. SIGNIFICANCE AND IMPACT OF THE STUDY These results provided a possibility of combined application of rifampin together with tunicamycin or other WecA inhibitors, which could be a new approach for the treatment of tuberculosis.
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Affiliation(s)
- L Xu
- Scientific Research Center, The Second Affiliated Hospital of Dalian Medical University, Dalian, China.,Department of Biochemistry and Molecular Biology, Dalian Medical University, Dalian, China
| | - L Qian
- Department of Biochemistry and Molecular Biology, Dalian Medical University, Dalian, China
| | - J Kang
- Department of Biochemistry and Molecular Biology, Dalian Medical University, Dalian, China
| | - S Sha
- Department of Biochemistry and Molecular Biology, Dalian Medical University, Dalian, China
| | - Y Xin
- Department of Biotechnology, Dalian Medical University, Dalian, China.,Liaoning Provincial Core Lab of Glycobiology and Glycoengineering, Dalian, China
| | - S Lu
- Scientific Research Center, The Second Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Y Ma
- Department of Biochemistry and Molecular Biology, Dalian Medical University, Dalian, China. .,Liaoning Provincial Core Lab of Glycobiology and Glycoengineering, Dalian, China.
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Li P, Qian L, Wu WD, Wu CF, Ouyang J. Impact of pedicle-lengthening osteotomy on spinal canal volume and neural foramen size in three types of lumbar spinal stenosis. Bone Joint Res 2016; 5:239-46. [PMID: 27340140 PMCID: PMC4957177 DOI: 10.1302/2046-3758.56.2000469] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 03/29/2016] [Indexed: 11/18/2022] Open
Abstract
Objectives Pedicle-lengthening osteotomy is a novel surgery for lumbar spinal stenosis (LSS), which achieves substantial enlargement of the spinal canal by expansion of the bilateral pedicle osteotomy sites. Few studies have evaluated the impact of this new surgery on spinal canal volume (SCV) and neural foramen dimension (NFD) in three different types of LSS patients. Methods CT scans were performed on 36 LSS patients (12 central canal stenosis (CCS), 12 lateral recess stenosis (LRS), and 12 foraminal stenosis (FS)) at L4-L5, and on 12 normal (control) subjects. Mimics 14.01 workstation was used to reconstruct 3D models of the L4-L5 vertebrae and discs. SCV and NFD were measured after 1 mm, 2 mm, 3 mm, 4 mm, or 5 mm pedicle-lengthening osteotomies at L4 and/or L5. One-way analysis of variance was used to examine between-group differences. Results In the intact state, SVC and NFD were significantly larger in the control group compared with the LSS groups (P<0.05). After lengthening at L4, the percentage increase in SCV (per millimetre) was LRS>CCS>FS>Control. After lengthening at L5 and L4-L5, the percentage increase in SCV (per millimetre) was LRS>FS>CCS>Control. After lengthening at L4 and L4-L5, the percentage increase in NFD (per millimetre) was FS>CCS>LRS>Control. After lengthening at L5, the percentage increase in NFD (per millimetre) was CCS>LRS>control>FS. Conclusions LRS patients are the most suitable candidates for treatment with pedicle-lengthening osteotomy. Lengthening L4 pedicles produced larger percentage increases in NFD than lengthening L5 pedicles (p < 0.05). Lengthening L4 pedicles may be the most effective option for relieving foraminal compression in LSS patients. Cite this article: P. Li, L. Qian, W. D. Wu, C. F. Wu, J. Ouyang. Impact of pedicle-lengthening osteotomy on spinal canal volume and neural foramen size in three types of lumbar spinal stenosis. Bone Joint Res 2016;5:239–246. DOI: 10.1302/2046-3758.56.2000469.
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Affiliation(s)
- P Li
- Department of Anatomy, Southern Medical University and Guangdong Provincial Key Laboratory of Medical Biomechanics and Academy of Orthopedics of Guangdong Province, Guangzhou, 510515, P. R. China
| | - L Qian
- Department of Anatomy, Southern Medical University and Guangdong Provincial Key Laboratory of Medical Biomechanics and Academy of Orthopedics of Guangdong Province, Guangzhou, 510515, P. R. China
| | - W D Wu
- Department of Orthopedic Surgery, Wuzhou Red Cross Hospital, Wuzhou, Guangxi, 543000, P. R. China
| | - C F Wu
- Department of Orthopedic Surgery, The Affiliated Hospital of Putian University, and the Affiliated Putian Hospital of Southern Medical University, Putian, Fujian, 351100, P.R.China
| | - J Ouyang
- Department of Anatomy, Southern Medical University, Key Laboratory of Medical Biomechanics, Academy of Orthopedics of Guangdong Province, Guangzhou, China
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Nie K, Mao T, Shi L, Yue N, Jabbour S, Kim S, Hu X, Qian L, Sun X, Niu T. SU-F-R-34: Quantitative Perfusion Measurement in Rectal Cancer Using Three Different Pharmacokinetic Models: Implications for Prospective Study Design. Med Phys 2016. [DOI: 10.1118/1.4955806] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Nie K, Shi L, Yue N, Jabbour S, Kim S, Mao T, Qian L, Hu X, Sun X, Niu T. SU-F-R-48: Early Prediction of Pathological Response of Locally Advanced Rectal Cancer Using Perfusion CT:A Prospective Clinical Study. Med Phys 2016. [DOI: 10.1118/1.4955819] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Abstract
Breast milk is one of the most important sources of postnatal microbes. Quantitative real-time polymerase chain reaction (qRT-PCR) is currently used for the quantitative analysis of bacterial 16S rRNA genes in breast milk. However, this method relies on the use of standard curves and is imprecise when quantitating target DNA of low abundance. In contrast, droplet digital PCR (DD-PCR) provides an absolute quantitation without the need for calibration curves. A comparison between DD-PCR and qRT-PCR was conducted for the quantitation of Bifidobacterium and Lactobacillus 16S RNA genes in human breast milk, and the impacts of selected maternal factors were studied on the composition of these two bacteria in breast milk. From this study, DD-PCR reported between 0-34,460 16S rRNA gene copies of Bifidobacterium genera and between 1,108-634,000 16S rRNA gene copies of Lactobacillus genera in 1 ml breast milk. The 16S rRNA gene copy number of Lactobacillus genera was much greater than that of Bifidobacterium genera in breast milk. DD-PCR showed a 10-fold lower limit of quantitation as compared to qRT-PCR. A higher correlation and agreement was observed between qRT-PCR and DD-PCR in Lactobacillus quantitation as compared to Bifidobacterium quantitation. Based on our DD-PCR quantitation, a low abundance of Bifidobacterium bacteria in breast milk was correlated to higher pre-pregnancy body mass index (BMI). However, no significant difference was observed for these two bacteria in breast milk between mothers who had vaginal deliveries and caesarean deliveries. This study suggests that DD-PCR is a better tool to quantitate the bacterial load of breast milk compared to the conventional qRT-PCR method. The number of breast milk Bifidobacterium bacteria is influenced by maternal pre-pregnancy BMI.
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Affiliation(s)
- L Qian
- 1 Xinhua Hospital, Shanghai Institute for Pediatric Research, Shanghai Jiao Tong University, School of Medicine, Kongjiang Road 1665, Shanghai 200092, China P.R.,2 Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Kongjiang Road 1665, Shanghai 200092, China P.R
| | - H Song
- 1 Xinhua Hospital, Shanghai Institute for Pediatric Research, Shanghai Jiao Tong University, School of Medicine, Kongjiang Road 1665, Shanghai 200092, China P.R.,2 Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Kongjiang Road 1665, Shanghai 200092, China P.R
| | - W Cai
- 1 Xinhua Hospital, Shanghai Institute for Pediatric Research, Shanghai Jiao Tong University, School of Medicine, Kongjiang Road 1665, Shanghai 200092, China P.R.,2 Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Kongjiang Road 1665, Shanghai 200092, China P.R
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Qian L, Li P, Wu W, Fang Y, Zhang J, Ouyang J. Restoration of the spinal canal volume in stenosis dependent on pedicle-lengthening distance in pedicle-lengthening osteotomy: A three dimensional simulation. Bone Joint J 2016; 98-B:238-43. [PMID: 26850430 DOI: 10.1302/0301-620x.98b2.35644] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
AIMS This study aimed to determine the relationship between pedicle-lengthening distance and bulge-canal volume ratio in cases of lumbar spinal stenosis, to provide a theoretical basis for the extent of lengthening in pedicle-lengthening osteotomies. METHODS Three-dimensional reconstructions of CT images were performed for 69 patients (33 men and 36 women) (mean age 49.96 years; 24 to 81). Simulated pedicle-lengthening osteotomies and disc bulge and spinal canal volume calculations were performed using Mimics software. RESULTS The mean spinal canal volume of the two groups, L4 and L5, were 14 646.81 mm(3) (5918.60 to 22 717.77) and 16 408.47 mm(3) (8678.21 to 31 204.79), respectively. The mean lengthening distance was 2.17 mm (0.5 to 4.8) and the mean bulge-canal volume ratio was 0.23 (0.05 to 0.48). The pedicle-lengthening distance of the two groups were very strongly correlated with disc bulge volume and bulge-canal volume ratio (p < 0.001); the predictive equation was established as L = 0.06 + 9.06R (where L equals the pedicle-lengthening distance and R represents the bulge-canal volume ratio). DISCUSSION Our findings indicated that lumbar pedicle-lengthening distance strongly correlates with bulge-canal volume ratio, which can be estimated before surgery from CT images. TAKE HOME MESSAGE The predictive equation could help surgeons to decide the pedicle lengthening distance according to individual's condition and guide the surgery effectively.
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Affiliation(s)
- L Qian
- Southern Medical University, 1023 Shatai South Road, Guangzhou, 510515 P.R., China
| | - P Li
- Department of Orthopedic Surgery, Guzhen People's Hospital of Zhongshan City, 15 Dongxing Middle Road, Zhongshan, 528421, P.R., China
| | - W Wu
- Wuzhou Red Cross Hospital, 3-1 Xinxing First Road, Wuzhou, 543000, P.R., China
| | - Y Fang
- Zhengzhou University, 288 Zhongzhou Middle Road, Luoyang, 471009, P.R., China
| | - J Zhang
- Southern Medical University, 1023 Shatai South Road, Guangzhou, 510515 P.R., China
| | - J Ouyang
- Southern Medical University, 1023 Shatai South Road, Guangzhou, 510515 P.R., China
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Garfein RS, Catanzaro DG, Rodwell TC, Avalos E, Jackson RL, Kaping J, Evasco H, Rodrigues C, Crudu V, Lin SYG, Groessl E, Groessel E, Hillery N, Trollip A, Ganiats T, Victor TC, Eisenach K, Valafar F, Channick J, Qian L, Catanzaro A. Phenotypic and genotypic diversity in a multinational sample of drug-resistant Mycobacterium tuberculosis isolates. Int J Tuberc Lung Dis 2016; 19:420-7. [PMID: 25859997 DOI: 10.5588/ijtld.14.0488] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVE To develop and evaluate rapid, molecular-based drug susceptibility testing (DST) for extensively drug-resistant tuberculosis (XDR-TB), we assembled a phenotypically and genotypically diverse collection of Mycobacterium tuberculosis isolates from patients evaluated for drug resistance in four high-burden countries. METHODS M. tuberculosis isolates from India (n = 111), Moldova (n = 90), the Philippines (n = 96), and South Africa (n = 103) were selected from existing regional and national repositories to maximize phenotypic diversity for resistance to isoniazid, rifampin (RMP), moxifloxacin, ofloxacin, amikacin, kanamycin, and capreomycin. MGIT™ 960 was performed on viable isolates in one laboratory using standardized procedures and drug concentrations. Genetic diversity within drug resistance phenotypes was assessed. RESULTS Nineteen distinct phenotypes were observed among 400 isolates with complete DST results. Diversity was greatest in the Philippines (14 phenotypes), and least in South Africa (9 phenotypes). Nearly all phenotypes included multiple genotypes. All sites provided isolates resistant to injectables but susceptible to fluoroquinolones. Many patients were taking drugs to which their disease was resistant. DISCUSSION Diverse phenotypes for XDR-TB-defining drugs, including resistance to fluoroquinolones and/or injectable drugs in RMP-susceptible isolates, indicate that RMP susceptibility does not ensure effectiveness of a standard four-drug regimen. Rapid, low-cost DST assays for first- and second-line drugs are thus needed.
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Affiliation(s)
- R S Garfein
- Department of Medicine, University of California, San Diego, California, USA
| | - D G Catanzaro
- University of Arkansas, Department of Biological Sciences, Fayetteville, Arkansas, USA
| | - T C Rodwell
- Department of Medicine, University of California, San Diego, California, USA
| | - E Avalos
- Department of Family Medicine and Public Health, University of California, San Diego, California, USA
| | - R L Jackson
- Department of Medicine, University of California, San Diego, California, USA
| | - J Kaping
- Department of Medicine, University of California, San Diego, California, USA
| | - H Evasco
- Tropical Disease Foundation, Inc, Philippine Institute of Tuberculosis Building, Makati City, Philippines
| | | | - V Crudu
- Microbiology and Morphology Laboratory, Institute of Phthisiopneumology, Chisinau, Moldova
| | - S-Y G Lin
- California Department of Public Health, Richmond, California, USA
| | | | - E Groessel
- Department of Family Medicine and Public Health, University of California, San Diego, California, USA
| | - N Hillery
- Department of Family Medicine and Public Health, University of California, San Diego, California, USA
| | - A Trollip
- Department of Biomedical Sciences, Stellenbosch University, Cape Town, South Africa
| | - T Ganiats
- Department of Family Medicine and Public Health, University of California, San Diego, California, USA
| | - T C Victor
- Department of Biomedical Sciences, Stellenbosch University, Cape Town, South Africa
| | - K Eisenach
- Department of Pathology, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - F Valafar
- University of Arkansas, Department of Biological Sciences, Fayetteville, Arkansas, USA
| | - J Channick
- Department of Medicine, University of California, San Diego, California, USA
| | - L Qian
- Department of Microbiology, University of Hawaii, Honolulu, Hawaii, USA
| | - A Catanzaro
- Department of Medicine, University of California, San Diego, California, USA
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Wang L, Qian L, Li X. THU0028 Cigarette Smoke Triggered Circulating and Infiltrating Neutrophil Extracellular Traps by Autophagy Dependent way in RA Patients. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.4961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Abstract
We examined the relationship between type 2 diabetes and skin wound healing. GSE38396 was downloaded from the Gene Expression Omnibus database and preprocessed using the RMA function of the Affy package. Differentially expressed genes (DEGs) were identified using the limma package, then DAVID was applied to per-form Gene Ontology functional annotation and Kyoto Encyclopedia of Genes and Genomes pathway enrichment analysis. MicroRNAs and their target genes were screened from the miRecords database and subjected to functional analysis. Finally, the STRING online database was applied to identify the protein-protein interaction relationships, and a combined score > 0.5 was considered to indicate an interaction. A total of 421 DEGs (208 upregulated and 213 downregulated genes) were identified in the skin lymphatic endothelial cells of patients with type II diabetes. Twenty-four microRNAs and 34 target genes were screened, including those involved in cell migration, regulation of cell proliferation, cell death, and cell adhesion regulation, among others. Protein-protein interaction network clustering analysis identified a module composed of 25 genes, and INTERPRO protein domain enrichment analysis showed that the protein domain of the clustering module main-ly contained the insulin-like growth factor binding proteins IGFBP3 and CYR61. IGFBP3 and CYR61 may play important roles in skin wound healing in diabetes patients. This information may be useful for developing methods to treat skin refractory wounds in type II diabetes.
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Affiliation(s)
- K Ge
- Department of Emergency, Shanghai 9th People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - J J Wu
- Department of Emergency, Shanghai 9th People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - L Qian
- Department of Emergency, Shanghai 9th People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - M J Wu
- Department of Wound Healing, Shanghai 9th People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - F L Wang
- Department of Emergency, Shanghai 9th People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - B Xu
- Department of Emergency, Shanghai 9th People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - T Xie
- Department of Wound Healing, Shanghai 9th People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
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Liu Z, Xia J, Xin L, Wang Z, Qian L, Wu S, Yang S, Li K. Swine leukocyte antigen class II genes (SLA-DRA, SLA-DRB1, SLA-DQA, SLA-DQB1) polymorphism and genotyping in Guizhou minipigs. Genet Mol Res 2015; 14:15256-66. [DOI: 10.4238/2015.november.30.1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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47
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Ma ZH, Causon DM, Qian L, Mingham CG, Gu HB, Ferrer PM. A compressible multiphase flow model for violent aerated wave impact problems. Proc Math Phys Eng Sci 2014. [DOI: 10.1098/rspa.2014.0542] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
This paper focuses on the numerical modelling of wave impact events under air entrapment and aeration effects. The underlying flow model treats the dispersed water wave as a compressible mixture of air and water with homogeneous material properties. The corresponding mathematical equations are based on a multiphase flow model which builds on the conservation laws of mass, momentum and energy as well as the gas-phase volume fraction advection equation. A high-order finite volume scheme based on monotone upstream-centred schemes for conservation law reconstruction is used to discretize the integral form of the governing equations. The numerical flux across a mesh cell face is estimated by means of the HLLC approximate Riemann solver. A third-order total variation diminishing Runge–Kutta scheme is adopted to obtain a time-accurate solution. The present model provides an effective way to deal with the compressibility of air and water–air mixtures. Several test cases have been calculated using the present approach, including a gravity-induced liquid piston, free drop of a water column in a closed tank, water–air shock tubes, slamming of a flat plate into still pure and aerated water and a plunging wave impact at a vertical wall. The obtained results agree well with experiments, exact solutions and other numerical computations. This demonstrates the potential of the current method to tackle more general wave–air–structure interaction problems.
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Affiliation(s)
- Z. H. Ma
- Centre for Mathematical Modelling and Flow Analysis, School of Computing, Mathematics and Digital Technology, Manchester Metropolitan University, Manchester M1 5GD, UK
| | - D. M. Causon
- Centre for Mathematical Modelling and Flow Analysis, School of Computing, Mathematics and Digital Technology, Manchester Metropolitan University, Manchester M1 5GD, UK
| | - L. Qian
- Centre for Mathematical Modelling and Flow Analysis, School of Computing, Mathematics and Digital Technology, Manchester Metropolitan University, Manchester M1 5GD, UK
| | - C. G. Mingham
- Centre for Mathematical Modelling and Flow Analysis, School of Computing, Mathematics and Digital Technology, Manchester Metropolitan University, Manchester M1 5GD, UK
| | - H. B. Gu
- Centre for Mathematical Modelling and Flow Analysis, School of Computing, Mathematics and Digital Technology, Manchester Metropolitan University, Manchester M1 5GD, UK
| | - P. Martínez Ferrer
- Centre for Mathematical Modelling and Flow Analysis, School of Computing, Mathematics and Digital Technology, Manchester Metropolitan University, Manchester M1 5GD, UK
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Liu Q, Zhu Y, Zhang Y, Cao J, Yuan Z, Wu J, Wu T, Qian L, Zhang F, Li Y. Clinical and Prognostic Diversities of Extranodal Nasal-Type Nk/t-Cell Lymphoma of the Upper Aerodigestive Tract: A Multicenter Study of 1147 Patients From an Endemic Area in China. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Yu C, Li S, Deng F, Yao Y, Qian L. Comparison of dexmedetomidine/fentanyl with midazolam/fentanyl combination for sedation and analgesia during tooth extraction. Int J Oral Maxillofac Surg 2014; 43:1148-53. [PMID: 24794760 DOI: 10.1016/j.ijom.2014.03.019] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Revised: 03/30/2014] [Accepted: 03/31/2014] [Indexed: 11/25/2022]
Abstract
Dexmedetomidine is an α2-adrenergic receptor agonist that causes minimal respiratory depression compared with alternative drugs. This study investigated whether combined dexmedetomidine/fentanyl offered better sedation and analgesia than midazolam/fentanyl in dental surgery. Sixty patients scheduled for unilateral impacted tooth extraction were randomly assigned to receive either dexmedetomidine and fentanyl (D/F) or midazolam and fentanyl (M/F). Recorded variables were patient preoperative anxiety scores, vital signs, visual analogue scale (VAS) pain scores, Observer's Assessment of Alertness/Sedation Scale (OAAS) scores after drug administration, surgeon and patient degree of satisfaction, and the duration of analgesia after surgery. The OAAS scores were significantly lower for patients administered D/F compared to those who received M/F. The duration of analgesia after the surgical procedure was significantly longer in patients who received D/F (5.3 h) than in those who received M/F (4.1 h; P=0.017). The number of surgeons satisfied with the level of sedation/analgesia provided by D/F was significantly higher than for M/F (P=0.001). Therefore, dexmedetomidine/fentanyl appears to provide better sedation, stable haemodynamics, surgeon satisfaction, and postoperative analgesia than midazolam/fentanyl during office-based unilateral impacted tooth extraction.
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Affiliation(s)
- C Yu
- Department of Anesthesia, Stomatology Hospital, Chongqing Medical University, Chongqing, China.
| | - S Li
- Department of Anesthesia, Stomatology Hospital, Chongqing Medical University, Chongqing, China
| | - F Deng
- Department of Anesthesia, Stomatology Hospital, Chongqing Medical University, Chongqing, China
| | - Y Yao
- Department of Anesthesia, Stomatology Hospital, Chongqing Medical University, Chongqing, China
| | - L Qian
- Duke-NUS Graduate Medical School Singapore, Singapore
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50
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Zhu EY, Tang Z, Qian L, Helt LG, Liscidini M, Sipe JE, Corbari C, Canagasabey A, Ibsen M, Kazansky PG. Poled-fiber source of broadband polarization-entangled photon pairs. Opt Lett 2013; 38:4397-4400. [PMID: 24177103 DOI: 10.1364/ol.38.004397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We demonstrate broadband polarization-entangled photon pair generation in a poled fiber phase matched for Type II downconversion in the 1.5 μm telecom band. Even with signal-idler separation greater than 100 nm, we observe fringe visibilities greater than 97% and tangle greater than 0.8. A Hong-Ou-Mandel interference experiment is also used to experimentally confirm the broadband nature of the entanglement.
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