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Pan Y, Zhang X, Geng H, Yu Y, Liu J, Li M, Yang H, Yuan Y, Xu Y, Wu Y, Wu G, Ma X, Cheng L. Increased Nasal Blimp1 + Treg Cells After Sublingual Immunotherapy Reflect the Efficacy of Treatment in Allergic Rhinitis. Adv Ther 2024; 41:1698-1710. [PMID: 38443650 DOI: 10.1007/s12325-024-02819-8] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2024] [Accepted: 02/07/2024] [Indexed: 03/07/2024]
Abstract
INTRODUCTION Allergen-specific immunotherapy (AIT) plays a pivotal role in altering the immune status and tissue responses in allergic rhinitis (AR). This study focuses on the impact of sublingual immunotherapy (SLIT) involving dust mite drops, exploring the modulation of regulatory T cells (Treg) and their specific marker, BLIMP1, in the nasal mucosa. METHODS Immune cells were isolated from nasal lavage fluid of patients with AR undergoing SLIT (n = 94). Treg cells were analyzed for BLIMP1 expression, and chemokine levels associated with Treg recruitment were assessed using Luminex assay. Patients were categorized on the basis of SLIT efficacy and followed for changes after discontinuation. RESULTS SLIT induced a significant increase in nasal Treg cells (7.09 ± 2.59% vs. 0.75 ± 0.27%, P < 0.0001). BLIMP1 expression in Treg cells notably increased after SLIT (0.36 ± 0.22% to 16.86 ± 5.74%, P < 0.0001). Ineffective SLIT cases exhibited lower levels of nasal Treg and Blimp1 + Treg cells (both P < 0.0001). Receiver operating characteristic (ROC) analysis confirmed their potential as efficacy predictors (AUC = 0.908 and 0.968, respectively). SLIT discontinuation led to a significant reduction in Treg and Blimp1 + Treg cells (P < 0.001), emphasizing their maintenance during treatment. Pro-inflammatory cytokines decreased (P < 0.001), while CCL2 associated with Treg recruitment increased (P = 0.0015). CONCLUSION Elevated nasal Blimp1 + Treg cells serve as a predictive biomarker for SLIT responsiveness in pediatric AR. Their influence on immunotherapy effectiveness contributes to a nuanced understanding of SLIT mechanisms, allowing for disease stratification and personalized treatment plans. This study offers scientific support for predicting SLIT efficacy, enhancing the prospects of improved treatment outcomes in AR.
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Affiliation(s)
- Yue Pan
- Department of Otolaryngology, Zhangjiagang Hospital Affiliated to Soochow University, Suzhou, 215600, China
| | - Xinxin Zhang
- Department of Otolaryngology, Zhangjiagang Hospital Affiliated to Soochow University, Suzhou, 215600, China
| | - Huanting Geng
- Department of Otolaryngology, Zhangjiagang Hospital Affiliated to Soochow University, Suzhou, 215600, China
| | - Yan Yu
- Department of Otolaryngology, Zhangjiagang Hospital Affiliated to Soochow University, Suzhou, 215600, China
| | - Jianyong Liu
- Department of Otolaryngology, Zhangjiagang Hospital Affiliated to Soochow University, Suzhou, 215600, China
| | - Menglin Li
- Department of Otolaryngology, Zhangjiagang Hospital Affiliated to Soochow University, Suzhou, 215600, China
| | - Huijun Yang
- Department of Otolaryngology, Zhangjiagang Hospital Affiliated to Soochow University, Suzhou, 215600, China
| | - Yifang Yuan
- Department of Otolaryngology, Zhangjiagang Hospital Affiliated to Soochow University, Suzhou, 215600, China
| | - Yao Xu
- Department of Otolaryngology, Zhangjiagang Hospital Affiliated to Soochow University, Suzhou, 215600, China
| | - Yujia Wu
- Department of Otolaryngology, Zhangjiagang Hospital Affiliated to Soochow University, Suzhou, 215600, China
| | - Geping Wu
- Department of Otolaryngology, Zhangjiagang Hospital Affiliated to Soochow University, Suzhou, 215600, China.
- Office of Science Education, Zhangjiagang Hospital Affiliated to Soochow University, 68 West Jiyang Road, Suzhou, 215000, China.
| | - Xingkai Ma
- Department of Otolaryngology, Zhangjiagang Hospital Affiliated to Soochow University, Suzhou, 215600, China
- Information Center, Zhangjiagang Hospital Affiliated to Soochow University, Suzhou, 215000, China
| | - Lei Cheng
- Department of Otorhinolaryngology and Clinical Allergy Center, The First Affiliated Hospital, Nanjing Medical University, Nanjing, 210029, China.
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Huang R, Geng H, Zhu L, Yan J, Li C, Li Y. CT radiomics can predict disease progression within 6 months after chimeric antigen receptor-modified T-cell therapy in relapsed/refractory B-cell non-Hodgkin's lymphoma patients. Clin Radiol 2023; 78:e707-e717. [PMID: 37407367 DOI: 10.1016/j.crad.2023.05.022] [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: 02/17/2023] [Revised: 05/05/2023] [Accepted: 05/30/2023] [Indexed: 07/07/2023]
Abstract
AIM To predict progression within 6 months after chimeric antigen receptor-modified (CAR) T-cell therapy for relapsed/refractory (R/R) B-cell non-Hodgkin's lymphoma (B-NHL) patients by radiomic indexes derived from contrast-enhanced computed tomography (CECT) examinations. MATERIALS AND METHODS Seventy R/R B-NHL patients who underwent CECT before treatment with CAR T-cells were examined retrospectively. In total, 297 volumes of interest for lesions were segmented from CECT images. Patients without and with disease progression were assigned to groups 1 and 2, respectively. Radiomic and combined predictive models were constructed by three machine-learning algorithms using features from the training set, respectively. Furthermore, predictive models were constructed based on multi-lesion-based and largest-lesion-based radiomic features, respectively. RESULTS In the test set, no marked differences were observed between the areas under the curves (AUCs) of the combined and radiomic models for all three machine-learning algorithms (all p>0.05). Differences in machine-learning algorithms did not significantly affect the predictive performances of the models. Radiomics and combined models constructed with multi-lesion-based radiomic features showed better predictive performances than those applying largest-lesion-based radiomic features (all p<0.05 for comparisons between combined models). CONCLUSION CECT-based radiomic features may be applied to predict disease progression in R/R B-NHL patients within 6 months after CAR T-cell treatment, and radiomic features from multiple lesions may have better predictive efficacy. Different machine-learning algorithms may not show significant differences in prediction performance.
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Affiliation(s)
- R Huang
- Department of Radiology, The First Affiliated Hospital of Soochow University, Suzhou City, Jiangsu province 215000, PR China
| | - H Geng
- Department of Hematology, The First Affiliated Hospital of Soochow University, Suzhou City, Jiangsu province 215000, PR China
| | - L Zhu
- Department of Ultrasound, The First Affiliated Hospital of Soochow University, Suzhou City, Jiangsu province, 215000, PR China
| | - J Yan
- Department of Radiology, The First Affiliated Hospital of Soochow University, Suzhou City, Jiangsu province 215000, PR China
| | - C Li
- Department of Hematology, The First Affiliated Hospital of Soochow University, Suzhou City, Jiangsu province 215000, PR China; National Clinical Research Center for Hematologic Diseases, The First Affiliated Hospital of Soochow University, Suzhou City, Jiangsu province 215000, PR China
| | - Y Li
- Department of Radiology, The First Affiliated Hospital of Soochow University, Suzhou City, Jiangsu province 215000, PR China; National Clinical Research Center for Hematologic Diseases, The First Affiliated Hospital of Soochow University, Suzhou City, Jiangsu province 215000, PR China; Institute of Medical Imaging, Soochow University, Suzhou City, Jiangsu province 215000, PR China.
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Jing Q, Zhang Y, Liu L, Xi F, Li Y, Li X, Yang D, Jiang S, Geng H, Chen X, Li S, Gao J, He Q, Li J, Tan Y, Yu Y, Jin K, Wu Q. SrB 4O 7:Sm 2+ fluorescence improves the accuracy of temperature measurements in externally heated diamond anvil cells. Rev Sci Instrum 2022; 93:123904. [PMID: 36586911 DOI: 10.1063/5.0099000] [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: 05/13/2022] [Accepted: 11/25/2022] [Indexed: 06/17/2023]
Abstract
The sample temperature in an externally heated diamond anvil cell (EHDAC) is generally measured by a thermocouple fixed to the pavilions of diamond anvils, ignoring the temperature difference between the thermocouple and the sample. However, the measured temperature depends strongly on the placement of the thermocouple, thus seriously reducing the accuracy of the temperature measurement and hindering the use of EHDAC in experiments requiring precise temperature measurements, such as high-pressure melting and phase-diagram investigations. In this study, the full width at half maximum (FWHM) of the 0-0 fluorescence line of strontium borate doped with bivalent samarium ions (SrBO4:Sm2+, SBO) is found to be highly sensitive to temperature and responds extremely rapidly to small temperature fluctuations, which makes it an excellent temperature indicator. We propose herein a precise method to measure temperature that involves measuring the FWHM of the 0-0 fluorescence line of SBO. This method is used to correct the temperature discrepancy between the thermocouple and the sample in an EHDAC. These corrections significantly improve the accuracy of temperature measurements in EHDACs. The accuracy of this method is verified by measuring the melting point of tin at ambient pressure. We also use this method to produce a tentative elementary phase diagram of tin up to 109 GPa and 495 K. This method facilitates high-pressure, high-temperature experiments demanding accurate temperature measurements in various disciplines. The study also discusses, in general, the experimental approach to measuring temperature.
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Affiliation(s)
- Q Jing
- National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621900, Sichuan, China
| | - Y Zhang
- National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621900, Sichuan, China
| | - L Liu
- National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621900, Sichuan, China
| | - F Xi
- National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621900, Sichuan, China
| | - Y Li
- Institute of High Energy Physics, Chinese Academy of Science, Beijing 100049, China
| | - X Li
- Institute of High Energy Physics, Chinese Academy of Science, Beijing 100049, China
| | - D Yang
- Institute of High Energy Physics, Chinese Academy of Science, Beijing 100049, China
| | - S Jiang
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
| | - H Geng
- National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621900, Sichuan, China
| | - X Chen
- National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621900, Sichuan, China
| | - S Li
- National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621900, Sichuan, China
| | - J Gao
- National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621900, Sichuan, China
| | - Q He
- National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621900, Sichuan, China
| | - J Li
- National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621900, Sichuan, China
| | - Y Tan
- National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621900, Sichuan, China
| | - Y Yu
- National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621900, Sichuan, China
| | - K Jin
- National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621900, Sichuan, China
| | - Q Wu
- National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621900, Sichuan, China
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Geng H, Wang YR. ["Identifying forms and verifying quality" in materia medica]. Zhonghua Yi Shi Za Zhi 2022; 52:270-275. [PMID: 36268662 DOI: 10.3760/cma.j.cn112155-20220614-00080] [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] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The thinking of "identifying forms and verifying quality'' in materia medica research came from the theory of "treatment based on syndrome differentiation" in traditional Chinese medicine. It refers to an approach to evaluate the quality of materia medica based on their characteristics and external properties in order to clarify the nature of medicinal materials. This paper examined the historical development of "identifying forms and verifying quality'' from the pre-Qin Dynasty up to today and analysed the connotation of this thinking. It is believed that this thinking has advantages such as scientific, holistic, practical, and universal considerations. However, it still needs to be developed in terms of philosophical thinking and practical application.
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Affiliation(s)
- H Geng
- China Institute for History of Medicine and Medical Literature, China Academy of Chinese Medical Sciences, Beijing 100700,China
| | - Y R Wang
- China Institute for History of Medicine and Medical Literature, China Academy of Chinese Medical Sciences, Beijing 100700,China
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Geng H, Sun QW. [The illustrations in the works of traditional Chinese medicine in the period of the Republic of China: indicating the integrated thinking of Chinese and western medicine]. Zhonghua Yi Shi Za Zhi 2022; 52:220-226. [PMID: 36008311 DOI: 10.3760/cma.j.cn112155-20220613-00078] [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] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Some works of traditional Chinese medicine in the period of the Republic of China were influenced by the integrated thinking of Chinese and Western medicine to some extent. This was reflected in the illustrations in the works of the time. A total of 1,932 illustrations or diagrams found in sixteen institution's book collections in China illustrated the integration of medical thinking. The illustrations and diagrams were classified into eleven categories. The categories were theoretical illustration, medical charts, viscera diagrams, disease diagrams, acupoint diagrams, apparatus diagrams, human body diagrams, fetal birth charts, drug diagrams, figure pictures, and experimental diagrams. It was found that these illustrations or diagrams had their own characteristics at the time and greatly influenced anatomy. However, the author has argued that most of the influence was on the surface.
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Affiliation(s)
- H Geng
- China Institute for History of Medicine and Medical Literature, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Q W Sun
- China Institute for History of Medicine and Medical Literature, China Academy of Chinese Medical Sciences, Beijing 100700, China
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Kiczynski M, Gorman SK, Geng H, Donnelly MB, Chung Y, He Y, Keizer JG, Simmons MY. Engineering topological states in atom-based semiconductor quantum dots. Nature 2022; 606:694-699. [PMID: 35732762 PMCID: PMC9217742 DOI: 10.1038/s41586-022-04706-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [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: 11/05/2021] [Accepted: 03/01/2022] [Indexed: 11/21/2022]
Abstract
The realization of controllable fermionic quantum systems via quantum simulation is instrumental for exploring many of the most intriguing effects in condensed-matter physics1–3. Semiconductor quantum dots are particularly promising for quantum simulation as they can be engineered to achieve strong quantum correlations. However, although simulation of the Fermi–Hubbard model4 and Nagaoka ferromagnetism5 have been reported before, the simplest one-dimensional model of strongly correlated topological matter, the many-body Su–Schrieffer–Heeger (SSH) model6–11, has so far remained elusive—mostly owing to the challenge of precisely engineering long-range interactions between electrons to reproduce the chosen Hamiltonian. Here we show that for precision-placed atoms in silicon with strong Coulomb confinement, we can engineer a minimum of six all-epitaxial in-plane gates to tune the energy levels across a linear array of ten quantum dots to realize both the trivial and the topological phases of the many-body SSH model. The strong on-site energies (about 25 millielectronvolts) and the ability to engineer gates with subnanometre precision in a unique staggered design allow us to tune the ratio between intercell and intracell electron transport to observe clear signatures of a topological phase with two conductance peaks at quarter-filling, compared with the ten conductance peaks of the trivial phase. The demonstration of the SSH model in a fermionic system isomorphic to qubits showcases our highly controllable quantum system and its usefulness for future simulations of strongly interacting electrons. Precision-engineered devices consisting of a linear array of ten quantum dots are used to realize both the trivial and topological phases of the many-body Su–Schrieffer–Heeger model.
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Affiliation(s)
- M Kiczynski
- Centre of Excellence for Quantum Computation and Communication Technology, School of Physics, UNSW Sydney, Kensington, New South Wales, Australia.,Silicon Quantum Computing Pty Ltd, UNSW Sydney, Kensington, New South Wales, Australia
| | - S K Gorman
- Centre of Excellence for Quantum Computation and Communication Technology, School of Physics, UNSW Sydney, Kensington, New South Wales, Australia.,Silicon Quantum Computing Pty Ltd, UNSW Sydney, Kensington, New South Wales, Australia
| | - H Geng
- Centre of Excellence for Quantum Computation and Communication Technology, School of Physics, UNSW Sydney, Kensington, New South Wales, Australia.,Silicon Quantum Computing Pty Ltd, UNSW Sydney, Kensington, New South Wales, Australia
| | - M B Donnelly
- Centre of Excellence for Quantum Computation and Communication Technology, School of Physics, UNSW Sydney, Kensington, New South Wales, Australia.,Silicon Quantum Computing Pty Ltd, UNSW Sydney, Kensington, New South Wales, Australia
| | - Y Chung
- Centre of Excellence for Quantum Computation and Communication Technology, School of Physics, UNSW Sydney, Kensington, New South Wales, Australia.,Silicon Quantum Computing Pty Ltd, UNSW Sydney, Kensington, New South Wales, Australia
| | - Y He
- Centre of Excellence for Quantum Computation and Communication Technology, School of Physics, UNSW Sydney, Kensington, New South Wales, Australia.,Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen, China
| | - J G Keizer
- Centre of Excellence for Quantum Computation and Communication Technology, School of Physics, UNSW Sydney, Kensington, New South Wales, Australia.,Silicon Quantum Computing Pty Ltd, UNSW Sydney, Kensington, New South Wales, Australia
| | - M Y Simmons
- Centre of Excellence for Quantum Computation and Communication Technology, School of Physics, UNSW Sydney, Kensington, New South Wales, Australia. .,Silicon Quantum Computing Pty Ltd, UNSW Sydney, Kensington, New South Wales, Australia.
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Lee SH, Geng H, Xiao Y. Radiotherapy Standardisation and Artificial Intelligence within the National Cancer Institute's Clinical Trials Network. Clin Oncol (R Coll Radiol) 2022; 34:128-134. [PMID: 34906407 PMCID: PMC8792288 DOI: 10.1016/j.clon.2021.11.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Revised: 11/09/2021] [Accepted: 11/25/2021] [Indexed: 02/03/2023]
Abstract
Artificial intelligence in healthcare refers to the use of complex algorithms designed to conduct certain tasks in an automated manner. Artificial intelligence has a transformative power in radiation oncology to improve the quality and efficiency of patient care, given the increase in volume and complexity of digital data, as well as the multi-faceted and highly technical nature of this field of medicine. However, artificial intelligence alone will not be able to fix healthcare's problem, because new technologies bring unexpected and potentially underappreciated obstacles. The inclusion of multicentre datasets, the incorporation of time-varying data, the assessment of missing data as well as informative censoring and the addition of clinical utility could significantly improve artificial intelligence models. Standardisation plays a crucial, supportive and leading role in artificial intelligence. Clinical trials are the most reliable method of demonstrating the efficacy and safety of a treatment or clinical approach, as well as providing high-level evidence to justify artificial intelligence. The National Surgical Adjuvant Breast and Bowel Project, the Radiation Therapy Oncology Group and the Gynecologic Oncology Group collaborated to form NRG Oncology (acronym NRG derived from the names of the parental groups). NRG Oncology is one of the adult cancer clinical trial groups containing radiotherapy specialty of the National Cancer Institute's Clinical Trials Network (NCTN). Standardisation from NRG/NCTN has the potential to reduce variation in clinical treatment and patient outcome by eliminating potential errors, enabling broader application of artificial intelligence tools. NCTN, NRG and Imaging and Radiation Oncology Core are in a unique position to help with standards development, advocacy and enforcement, all of which can benefit from artificial intelligence, as artificial intelligence has the ability to improve trial success rates by transforming crucial phases in clinical trial design, from study planning through to execution. Here we will examine: (i) how to conduct technical and clinical evaluations before adopting artificial intelligence technologies, (ii) how to obtain high-quality data for artificial intelligence, (iii) the NCTN infrastructure and standards, (iv) radiotherapy standardisation for clinical trials and (v) artificial intelligence applications in standardisation.
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Affiliation(s)
- S H Lee
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
| | - H Geng
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
| | - Y Xiao
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
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Wang ZY, Feng SH, Fan BL, Ma W, Jia XC, Geng H. [Effects of regional citrate anticoagulation in continuous veno-venous hemofiltration of severe burn patients]. Zhonghua Shao Shang Za Zhi 2021; 37:1137-1142. [PMID: 34839601 DOI: 10.3760/cma.j.cn501120-20200816-00381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the effects of regional citrate anticoagulation in continuous veno-venous hemofiltration (CVVH) of severe burn patients. Methods: A retrospective non-randomized controlled study was conducted. From January 2017 to August 2020, sixty-eight severe burn patients who met the inclusion criteria were treated with CVVH in Affiliated Hospital of Nankai University. According to the different methods of blood anticoagulation in CVVH treatment, patients were divided into citrate group (n=40) and heparin group (n=28). In the citrate group, 32 males and 8 females were (40±18) years old with total burn area of (62±14)% total body surface area (TBSA); in the heparin group, 22 males and 6 females were (38±16) years old with total burn area of (57±20)%TBSA. Creatinine level, C-reactive protein (CRP) value, and urea nitrogen level in serum of patients were recorded at 0 (immediately), 48, and 96 h after CVVH treatment in 2 groups, urea clearance index was calculated based on urea nitrogen level at 0, 48, and 96 h after CVVH treatment in 2 groups, platelet count (PLT), prothrombin time (PT), and activated partial thromboplastin time (APTT) in total coagulation of patients were recorded. The frequency of forced hemofiltration termination caused by adverse reactions such as severe hypocalcemia, aggravated wound bleeding, and new bleeding on non-wound surface of patients was recorded within 96 h of CVVH treatment. The duration of daily CVVH use from the beginning to the end was recorded. Data were statistically analyzed with chi-square test, analysis of variance for repeated measurement, independent samples t test, and Bonferroni correction. Results: There were no significant differences in urea nitrogen level, creatinine level, and CRP value in serum of patients between 2 groups at 0 h after treatment (P>0.05). At 48 and 96 h after treatment, urea nitrogen level, creatinine level, and CRP value in serum of patients in citrate group were significantly lower than those in heparin group (t=3.366, -2.315, 2.942, -2.657, 2.011, -2.441, P<0.05), and urea clearance index of patients in citrate group was significantly higher than that in heparin group (t=1.017, 2.233, P<0.05). There were no statistically significant differences in PLT, PT, and APTT of patients between 2 groups at 0 h after treatment (P>0.05). At 48 and 96 h, PLT of patients in citrate group was significantly higher than that in heparin group (t=-3.417, -4.143, P<0.05 or P<0.01), PT of patients in citrate group was significantly shorter than that in heparin group (t=2.760, -3.655, P<0.01), APTT of patients in citrate group was significantly shorter than that in heparin group (t=3.719, 5.146, P<0.05 or P<0.01). Within 96 h of treatment, there was 1 case of hypocalcemia and 1 case of aggravated wound bleeding resulting in forced hemofiltration termination in citrate group, but there was no new bleeding on non-wound surface; in heparin group, there was no hypocalcemia, but 7 cases of aggravated wound bleeding and 2 cases of new bleeding on non-wound surface (both at the tracheotomy site) resulting in forced hemofiltration termination. The use time of blood purification filter of patients in citrate group was (11.7±4.8) h, obviously longer than (6.6±2.5) h in heparin group (t=3.310, P<0.01). Conclusions: The use of regional citrate anticoagulation in CVVH treatment of severe burn patients has the advantages including little effect on coagulation function and high safety, can effectively prolong the use time of filter and improve the therapeutic effect, but this conclusion still needs to be further verified in clinical application.
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Affiliation(s)
- Z Y Wang
- Department of Burn Plastic Surgery, Affiliated Hospital of Nankai University (the Fourth Hospital of Tianjin) , Tianjin 300222, China
| | - S H Feng
- Department of Burn Plastic Surgery, Affiliated Hospital of Nankai University (the Fourth Hospital of Tianjin) , Tianjin 300222, China
| | - B L Fan
- Department of Burn Plastic Surgery, Affiliated Hospital of Nankai University (the Fourth Hospital of Tianjin) , Tianjin 300222, China
| | - W Ma
- Department of Burn Plastic Surgery, Affiliated Hospital of Nankai University (the Fourth Hospital of Tianjin) , Tianjin 300222, China
| | - X C Jia
- Department of Burn Plastic Surgery, Affiliated Hospital of Nankai University (the Fourth Hospital of Tianjin) , Tianjin 300222, China
| | - H Geng
- Department of Burn Plastic Surgery, Affiliated Hospital of Nankai University (the Fourth Hospital of Tianjin) , Tianjin 300222, China
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Uche C, Caruana R, Lee S, Geng H, Wright C, Xiao Y. Can Omics Help in Prognostic Machine Learning Interpretability? Int J Radiat Oncol Biol Phys 2021. [DOI: 10.1016/j.ijrobp.2021.07.548] [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: 10/20/2022]
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Jin Y, Ye D, Geng H, Yu YQ, Zhang XX, Peng SY, Li JT. [A new classification of intrahepatic cholangiocarcinoma based on actual anatomy:a series of 135 cases]. Zhonghua Wai Ke Za Zhi 2021; 59:842-847. [PMID: 34619910 DOI: 10.3760/cma.j.cn112139-20210716-00313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore the feasibility and clinical value of a new classification for resectable intrahepatic cholangiocarcinoma (IHCC) according to the actual anatomy. Methods: The data of 135 patients with IHCC who were admitted to the Department of Hepatopancreatobiliary Surgery,Second Affiliated Hospital of Zhejiang University School of Medicine from November 2011 to November 2020 after discussion by a multidisciplinary team and planned to undergo radical resection were analyzed retrospectively. There were 77 males and 58 females,with a median age of 61 years (range:26 to 86 years),of which 38 cases had vascular invasion. This new classification was carried out independently by two hepatobiliary surgeons. First,a preliminary classification was made based on the location of the tumor,and then the final classification was based on vascular invasion. All patients were followed up by telephone,and the follow-up was as of November 2020. Survival time is defined as the time after surgery to follow-up or death. Log-rank test was used to compare patients' median recurrence-free survival and overall survival time. The Cox proportional hazard model was used to analyze the prognosis factors of the overall survival time of patients with IHCC. Results: Among the 135 patients,129 underwent R0 resection and 6 underwent R1 resection. According to the actual anatomy,28 cases (20.7%) belonged to segmental type, 43 cases (31.9%) belonged to branch type, 64 cases (47.4%). The median survival time of all patients was 35.2 months(95%CI:21.3 to 70.5 months),the 1-year cumulative survival rate was 75.1%,the 3-year cumulative survival rate was 45.8%,and the 5-year cumulative survival rate was 39.0%. After grouping according to the classification,the median survival time of segmental patients was 36.9 months (more than 50% of patients reached the median survival time),and the median survival time of branched patients was 33.8 months (95%CI:16.8 to 38.5);The median survival time of lobe patients was 25.0 months (95%CI:13.6 to 58.7). The result of Log-rank test between groups indicated that the median survival time of patients with segmental type was better than that of patients with branch and lobe type(HR=2.03,95%CI:1.24 to 3.64,P=0.006);There was no significant difference in survival time between patients with branch type and lobe type (P=0.685). The results of the multivariate analysis of the Cox risk ratio model suggested that the actual anatomical location classification (HR=2.32,95%CI:1.10 to 4.92,P=0.028) and the postoperative lymph node metastasis rate (HR=2.06,95%CI:1.24 to 3.45,P=0.005) were independent factors related to survival after radical resection of IHCC patients. Conclusion: It is simple and convenient to classify resectable IHCC by actual anatomy,which can be used to preliminarily judge the prognosis of patients and provide a feasible classification scheme for the clinic.
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Affiliation(s)
- Y Jin
- Department of Hepatopancreatobiliary Surgery,Second Affiliated Hospital,Zhejiang University School of Medicine,Hangzhou 310009,China
| | - D Ye
- Department of Hepatopancreatobiliary Surgery,Second Affiliated Hospital,Zhejiang University School of Medicine,Hangzhou 310009,China
| | - H Geng
- Department of Hepatopancreatobiliary Surgery,Second Affiliated Hospital,Zhejiang University School of Medicine,Hangzhou 310009,China
| | - Y Q Yu
- Department of Hepatopancreatobiliary Surgery,Second Affiliated Hospital,Zhejiang University School of Medicine,Hangzhou 310009,China
| | - X X Zhang
- Department of Hepatopancreatobiliary Surgery,Second Affiliated Hospital,Zhejiang University School of Medicine,Hangzhou 310009,China
| | - S Y Peng
- Department of Hepatopancreatobiliary Surgery,Second Affiliated Hospital,Zhejiang University School of Medicine,Hangzhou 310009,China
| | - J T Li
- Department of Hepatopancreatobiliary Surgery,Second Affiliated Hospital,Zhejiang University School of Medicine,Hangzhou 310009,China
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Yang B, Tang KK, Geng H, Lam WW, Wong YS, Huang CY, Chiu TL, Kong CW, Cheung CW, Cheung KY, Yu SK. Comparison of modeling accuracy between Radixact ®and CyberKnife ®Synchrony ®respiratory tracking system. Biomed Phys Eng Express 2021; 7. [PMID: 34416743 DOI: 10.1088/2057-1976/ac1fa5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 04/01/2021] [Accepted: 08/20/2021] [Indexed: 11/12/2022]
Abstract
Synchrony Respiratory Tracking system adapted from CyberKnife has been introduced in Radixact to compensate the tumor motion caused by respiration. This study aims to compare the modeling accuracy of the Synchrony system between Radixact and CyberKnife. Two Synchrony plans based on fiducial phantoms were created for CyberKnife and Radixact, respectively. Different respiratory motion traces were used to drive a motion platform to move along the superoinferior and left-right direction. The cycle time and the amplitude of target/surrogate motion of one selected motion trace were scaled to investigate the dependence of modeling accuracy on the motion characteristic. The predicted target position, the correlation error, potential difference (Radixact only) and standard error (CyberKnife only) were extracted from raw data or log files of the two systems. The modeling accuracy was evaluated by calculating the root-mean-square (RMS) error between the predicted target positions and the input motion trace. A threshold T95 within which 95% of the potential difference or the standard error lay was defined and evaluated. Except for the motion trace with a small amplitude and a good (linear) correlation between target and surrogate motion, Radixact showed smaller RMS errors than CyberKnife. The RMS error of both systems increased with the motion amplitude and showed a decreasing trend with the increasing cycle time. No correlation was found between the RMS error and the amplitude of surrogate motion. T95 could be a good estimator of modeling accuracy for CyberKnife rather than Radixact. The correlation error defined in Radixact were largely affected by the number of fiducial markers and the setup error. In general, the modeling accuracy of the Radixact Synchrony system is better than that of the CyberKnife Synchrony system under unfavorable conditions.
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Affiliation(s)
- B Yang
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - K K Tang
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - H Geng
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - W W Lam
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - Y S Wong
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - C Y Huang
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - T L Chiu
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - C W Kong
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - C W Cheung
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - K Y Cheung
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - S K Yu
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
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Yang B, Wong YS, Lam WW, Geng H, Huang CY, Tang KK, Law WK, Ho CC, Nam PH, Cheung KY, Yu SK. Initial clinical experience of patient-specific QA of treatment delivery in online adaptive radiotherapy using a 1.5 T MR-Linac. Biomed Phys Eng Express 2021; 7. [PMID: 33882471 DOI: 10.1088/2057-1976/abfa80] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [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: 10/30/2020] [Accepted: 04/21/2021] [Indexed: 11/11/2022]
Abstract
Purpose. This study aims to evaluate the performance of a commercial 1.5 T MR-Linac by analyzing its patient-specific quality assurance (QA) data collected during one full year of clinical operation.Methods and Materials. The patient-specific QA system consisted of offline delivery QA (DQA) and online calculation-based QA. Offline DQA was based on ArcCHECK-MR combined with an ionization chamber. Online QA was performed using RadCalc that calculated and compared the point dose calculation with the treatment planning system (TPS). A total of 24 patients with 189 treatment fractions were enrolled in this study. Gamma analysis was performed and the threshold that encompassed 95% of QA results (T95) was reported. The plan complexity metric was calculated for each plan and compared with the dose measurements to determine whether any correlation existed.Results. All point dose measurements were within 5% deviation. The mean gamma passing rates of the group data were found to be 96.8 ± 4.0% and 99.6 ± 0.7% with criteria of 2%/2mm and 3%/3mm, respectively. T95 of 87.4% and 98.2% was reported for the overall group with the two passing criteria, respectively. No statistically significant difference was found between adaptive treatments with adapt-to-position (ATP) and adapt-to-shape (ATS), whilst the category of pelvis data showed a better passing rate than other sites. Online QA gave a mean deviation of 0.2 ± 2.2%. The plan complexity metric was positively correlated with the mean dose difference whilst the complexity of the ATS cohort had larger variations than the ATP cohort.Conclusions. A patient-specific QA system based on ArcCHECK-MR, solid phantom and ionization chamber has been well established and implemented for validation of treatment delivery of a 1.5 T MR-Linac. Our QA data obtained over one year confirms that good agreement between TPS calculation and treatment delivery was achieved.
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Affiliation(s)
- B Yang
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - Y S Wong
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - W W Lam
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - H Geng
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - C Y Huang
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - K K Tang
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - W K Law
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - C C Ho
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - P H Nam
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - K Y Cheung
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - S K Yu
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
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Uche C, Geng H, Men K, Zhong H, Xiao Y. Evaluation of Two Auto-Segmentation Approaches for Cardiac Substructures Delineation. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.719] [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]
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Geng H, Men K, Lukka H, Leath C, Kudchadker R, Lee Y, Benedict S, Xiao Y. Evaluation Of A Deep Learning-Based Auto-Segmentation Method For Quality Assurance Of Both Male And Female Pelvic Organ-At-Risk Contours In NCTN Clinical Trials. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.214] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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15
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Lee S, Geng H, Zhong H, Fan Y, Rosen M, Xiao Y. Intratumoral Radiomics and Dosiomics Biomarkers for Predicting Overall Survival in the RTOG 0617 Clinical Trial. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.931] [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: 11/24/2022]
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16
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Rubenstein JL, Geng H, Vu K, Mannis G, Formaker P, Hwang J, Munster PN, Damato B. Maintenance lenalidomide in primary CNS lymphoma. Ann Oncol 2020; 30:1397-1398. [PMID: 31046114 DOI: 10.1093/annonc/mdz142] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- J L Rubenstein
- Department of Medicine, Hematology/Oncology, Ocular Oncology, UCSF, San Francisco, USA; Helen Diller Family Comprehensive Cancer Center, Ocular Oncology, UCSF, San Francisco, USA.
| | - H Geng
- Helen Diller Family Comprehensive Cancer Center, Ocular Oncology, UCSF, San Francisco, USA; Laboratory Medicine, Ocular Oncology, UCSF, San Francisco, USA
| | - K Vu
- Department of Medicine, Hematology/Oncology, Ocular Oncology, UCSF, San Francisco, USA
| | - G Mannis
- Stanford Hematology, Ocular Oncology, UCSF, San Francisco, USA
| | - P Formaker
- Department of Medicine, Hematology/Oncology, Ocular Oncology, UCSF, San Francisco, USA
| | - J Hwang
- Helen Diller Family Comprehensive Cancer Center, Ocular Oncology, UCSF, San Francisco, USA; Biostatistics and Computational Biology, Ocular Oncology, UCSF, San Francisco, USA
| | - P N Munster
- Department of Medicine, Hematology/Oncology, Ocular Oncology, UCSF, San Francisco, USA; Helen Diller Family Comprehensive Cancer Center, Ocular Oncology, UCSF, San Francisco, USA
| | - B Damato
- Helen Diller Family Comprehensive Cancer Center, Ocular Oncology, UCSF, San Francisco, USA; Department of Ophthalmology, Ocular Oncology, UCSF, San Francisco, USA
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Shi YK, Fang J, Zhang S, Liu Y, Wang L, Si M, Ge M, Geng H. Safety and efficacy of WX-0593 in ALK-positive or ROS1-positive non-small cell lung cancer. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz260.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Liu HH, Su J, Ma J, Li ZQ, Cui S, Ji LH, Geng H, Tang F, Ge RL. [The expression of VHL/HIF signaling pathway in the erythroid progenitor cells with chronic mountain sickness]. Zhonghua Yi Xue Za Zhi 2019; 99:2670-2674. [PMID: 31505717 DOI: 10.3760/cma.j.issn.0376-2491.2019.34.007] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the expression and interaction of VHL/HIF-α pathways including HIF-1α, HIF-2α as well as VHL in erythroid progenitor cells of bone marrow from chronic mountain sickness (CMS) patients. Methods: A total of 25 patients with CMS and 21 healthy controls were recruited for this study. The CD71(+)CD235a(+) cells in bone marrow mononuclear cells, marked as erythroid progenitor cells, were isolated using MACS separation technology. The expression levels of HIF-1α, HIF-2α and VHL in erythroid progenitor cells were detected by Western blotting and real-time fluorescence quantitative PCR. Results: The mRNA levels of HIF-2α were higher in erythroid progenitor cells of CMS than in healthy controls [1.68 (0.81, 2.22) vs 0.98 (0.60, 1.19), P<0.05], while HIF-1α and VHL mRNA levels were similar between the two groups (P>0.05). Spearman analyses indicated that HIF-2α mRNA was positively associated with hemoglobin (Hb) levels in the erythroid progenitor cells of CMS (ρ=0.504, P<0.05). Furthermore, the mRNA level of HIF-2α was correlated with the mRNA level of VHL in the erythroid progenitor cells of CMS (ρ=0.647, P<0.05).The protein levels of HIF-2α in the erythroid progenitor cells of CMS were higher than that of healthy controls [0.94(0.68, 3.30) vs 0.59(0.30, 0.88), P<0.05], but the protein levels of HIF-1α and VHL were similar between the two groups (P>0.05). Conclusions: The abnormal increased expression of HIF-2α in the erythroid progenitor cells of CMS patients leads to the abnormal expression of hypoxia sensitive genes downstream, participating in the occurrence and development of CMS.
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Affiliation(s)
- H H Liu
- Provincial Key Lab of High Altitude Medicine, Qinghai & Utah Joint Key Lab, Research Center for High Altitude Medicine of Qinghai University, Xining 810001, China
| | - J Su
- Department of Rheumatology, Qinghai University Affiliated Hospital, Xining 810001, China
| | - J Ma
- Department of Hematology, Qinghai University Affiliated Hospital, Xining 810001, China
| | - Z Q Li
- Department of Hematology, Qinghai University Affiliated Hospital, Xining 810001, China
| | - S Cui
- Department of Hematology, Qinghai University Affiliated Hospital, Xining 810001, China
| | - L H Ji
- Department of Hematology, Qinghai University Affiliated Hospital, Xining 810001, China
| | - H Geng
- Department of Hematology, Qinghai University Affiliated Hospital, Xining 810001, China
| | - F Tang
- Provincial Key Lab of High Altitude Medicine, Qinghai & Utah Joint Key Lab, Research Center for High Altitude Medicine of Qinghai University, Xining 810001, China
| | - R L Ge
- Provincial Key Lab of High Altitude Medicine, Qinghai & Utah Joint Key Lab, Research Center for High Altitude Medicine of Qinghai University, Xining 810001, China
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Zhong H, Athamnah M, Huang M, Geng H, Cheng C, Men K, Rosen M, Rosenthal D, Thorstad W, Ad VB, Trotti A, Roach M, Gore E, Birrer M, Raben D, Shenouda G, Foote R, Fan Y, Xiao Y. Comparisons of Outcome Prediction Performance between Radiomics Features and Clinical Features Based on NRG Oncology/ RTOG-0522. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.548] [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: 10/26/2022]
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Geng H, Men K, Lee N, Xia P, Xiao Y. Deep Learning Autosegmentation Model for NRG-HN001 Contour Quality Assurance. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.1155] [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: 11/24/2022]
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21
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Sasankan N, Geng H, Zhong H, Fan Y, Rosen M, Bradley J, Cao J, Garces Y, Iyengar P, Kavadi V, Robinson C, Welsh J, Narayan S, MacRae R, Gaur R, Curran W, Videtic G, Pu V A, Koprowski C, Xiao Y. Radiomic Biomarkers Evaluation of the High Dose Arm of RTOG 0617. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.088] [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: 10/26/2022]
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Wang ZY, Feng SH, Fan BL, Xie YG, Ma W, Jia XC, Geng H. [Influence of directed restrictive fluid management strategy on patients with serious burns complicated by severe inhalation injury]. Zhonghua Shao Shang Za Zhi 2019; 35:501-506. [PMID: 31357819 DOI: 10.3760/cma.j.issn.1009-2587.2019.07.005] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore the influence of directed restrictive fluid management strategy (RFMS) on patients with serious burns complicated by severe inhalation injury. Methods: Sixteen patients with serious burns complicated by severe inhalation injury hospitalized in our department from December 2014 to December 2017, meeting the inclusion criteria and treated with RFMS, were enrolled in directed treatment group. Thirty-four patients with serious burns complicated by severe inhalation injury hospitalized in our department from December 2012 to December 2017, meeting the inclusion criteria and without RFMS, were enrolled in routine treatment group. Medical records of patients in 2 groups were retrospectively analyzed. Within post injury day 2, mean arterial pressure (MAP), central venous pressure (CVP), extravascular lung water index (ELWI), global end-diastolic volume index, and pulmonary vascular permeability index of patients in directed treatment group were monitored by pulse contour cardiac output monitoring technology, while MAP and CVP of patients in routine treatment group were monitored by routine method. On post injury day 3 to 7, patients in 2 groups were treated with routine fluid supplement therapy of our Department to maintain hemodynamic stability, and patients in directed treatment group were treated according to RFMS directed with goal of ELWI≤7 mL·kg(-1)·m(-2). On post injury day 3 to 7, total fluid intake, total fluid output, and total fluid difference between fluid intake and output within 24 h, value of blood lactic acid, and oxygenation index of patients in 2 groups were recorded. Occurrence of acute respiratory distress syndrome (ARDS) on post injury day 3 to 7 and 8 to 28, mechanical ventilation time within post injury day 28, and occurrence of death of patients in 2 groups were counted. Data were processed with chi-square test, t test, and analysis of variance for repeated measurement. Results: The total fluid intakes within 24 h of patients in directed treatment group were close to those in routine treatment group on post injury day 3, 4, 5, 6, 7 (t=-0.835, -1.618, -2.463, -1.244, -2.552, P>0.05). The total fluid outputs and total fluid differences between fluid intake and output within 24 h of patients in 2 groups on post injury day 3 were close (t=0.931, -2.274, P>0.05). The total fluid outputs within 24 h of patients in directed treatment group were significantly higher than those in routine treatment group on post injury day 4, 5, 6, 7 (t=2.645, 2.352, 1.847, 1.152, P<0.05). The total fluid differences between fluid intake and output within 24 h of patients in directed treatment group were (2 928±768), (2 028±1 001), (2 186±815), and (2 071±963) mL, significantly lower than (4 455±960), (3 434±819), (3 233±1 022), and (3 453±829) mL in routine treatment group (t=-4.331, -3.882, -3.211, -4.024, P<0.05). The values of blood lactic acid of patients in directed treatment group and routine treatment group on post injury day 3, 4, 5, 6, 7 were close (t=0.847, 1.221, 0.994, 1.873, 1.948, P>0.05). The oxygenation indexes of patients in directed treatment group on post injury day 3 and 4 were (298±78) and (324±85) mmHg (1 mmHg=0.133 kPa ), which were close to (270±110) and (291±90) mmHg in routine treatment group (t=-1.574, 2.011, P>0.05). The oxygenation indexes of patients in directed treatment group on post injury day 5, 6, 7 were (372±88), (369±65), and (377±39) mmHg, significantly higher than (302±103), (313±89), and (336±78) mmHg in routine treatment group (t=3.657, 3.223, 2.441, P<0.05). On post injury day 3, 4, 5, 6, 7, patients with ARDS in directed treatment group were less than those in routine treatment group, but with no significantly statistical difference between the 2 groups (χ(2)=0.105, P>0.05). On post injury day 8 to 28, patients with ARDS in directed treatment group were significantly less than those in routine treatment group (χ(2)=0.827, P<0.05). The mechanical ventilation time within post injury day 28 of patients in directed treatment group was apparently shorter than that in routine treatment group (t=-2.895, P<0.05). Death of patients in directed treatment group within post injury day 28 was less than that in routine treatment group, but with no significantly statistical difference between the 2 groups (χ(2)=0.002, P>0.05). Conclusions: Under the circumstance of hemodynamics stability, RFMS directed with goal of ELWI≤7 mL·kg(-1)·m(-2) on post injury day 3 to 7 is an useful strategy, which can reduce occurrence rate of ADRS and shorten mechanical ventilation time of patients with serious burns complicated by severe inhalation injury at late stage of burns.
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Affiliation(s)
- Z Y Wang
- Department of Burns and Plastic Surgery, Affiliated Hospital of Nankai University (the Fourth Hospital of Tianjin), Tianjing 300222, China
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Geng H, Chen XH, Du JL, Wang YJ, Liu ML. [Analysis on the characteristics of postural blood pressure changes recorded with continuous non-invasive arterial pressure monitoring system and the correlative factors in elderly hospitalized patients]. Zhonghua Xin Xue Guan Bing Za Zhi 2019; 47:381-387. [PMID: 31142082 DOI: 10.3760/cma.j.issn.0253-3758.2019.05.009] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore the characteristics of postural blood pressure changes in elderly inpatients and the related factors of orthostatic hypotension (OH). Methods: This study was a clinical case control study. Two hundred and sixty-six elderly patients (≥60 years old), who were hospitalized between April 2016 and November 2017 in Geriatric Department of Peking University First Hospital, were included. They were divided into direct standing group and indirect standing group. Direct standing group involved 102 patients, they changed posture from supine directly to standing position, and the blood pressures at the moments of supine, immediately after standing and the first, second, and third minute after standing were recorded by continuous noninvasive arterial pressure (CNAP) system. Indirect standing group involved 164 patients, and they changed posture from supine to sitting for 3 minutes, and then changed to standing position. Blood pressures at the moments of supine, immediately after sitting, the third minute after sitting, immediately after standing and the third minute after standing was recorded by CNAP. Blood pressure changes after different postural changes mode and the rates of OH were compared. The related factors of OH was analyzed by binary logistic regression analysis. Results: The lowest systolic blood pressures (SBP) mostly occurred immediately after postural change: immediately after standing for direct standing group (86.3%(88/102)), and immediately after sitting for indirect standing group (59.1%(97/164)). The lowest diastolic blood pressures (DBP) mostly occurred immediately after standing in the two groups: 87.3%(89/102) for direct standing group and 43.3% (71/164) for indirect standing group. The maximum SBP drop (SBP of supine minus the lowest SBP during postural changes) of direct standing group was significantly higher than indirect standing group (median 20.5(14.0, 29.3) vs. 18.0(11.0, 26.0) mmHg (1 mmHg=0.133 kPa, P<0.05). The rates of OH occurred immediately and within 3 minutes from supine to standing position were significantly higher in direct standing group than in indirect standing group (65.7% (67/102) vs. 43.9% (72/164), and 70.6% (72/102) vs. 49.4% (81/164), both P<0.05). Binary logistic regression analysis showed that brachial-ankle pulse wave velocity was positively associated with OH after a transition from supine to standing position (immediately and within 3 minutes, OR=1.002 (95%CI 1.000-1.004), 1.003 (95%CI 1.001-1.006), P=0.014, 0.006) in direct standing group. Conclusions: OH is common in elderly hospitalized patients. The most obvious blood pressure changes are likely to occur immediately after position changes. Adding a sitting position during the transition of supine to standing position may decrease the amplitude of SBP drop. Brachial-ankle pulse wave velocity is associated with OH after the transition from the supine to standing position in the elderly inpatients.
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Affiliation(s)
- H Geng
- Department of Geriatrics, Peking University First Hospital, Beijing 100034, China
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Yang B, Geng H, Lam W, Cheung K, Yu S. EP-1745 Performance of ArcCHECK based quality assurance in helical tomotherapy with TomoEdge technology. Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)32165-6] [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: 12/01/2022]
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Yang B, Lam W, Geng H, Cheung K, Yu S. EP-1843 Evaluation of treatment efficiency for helical tomotherapy with TomoEdge technology. Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)32263-7] [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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Kuo M, Zhang T, Zhong H, Huang M, Geng H, Cheng C, Li Y, Dai J, Xiao Y. External Validation of a Deep Learning-Based Auto-Segmentation Method for Radiation Therapy. Int J Radiat Oncol Biol Phys 2018. [DOI: 10.1016/j.ijrobp.2018.07.1522] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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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Geng H, Hu XF. [Types and characteristics of advertising images in Chinese medicine works during the Republic of China]. Zhonghua Yi Shi Za Zhi 2018; 48:280-286. [PMID: 30646666 DOI: 10.3760/cma.j.issn.0255-7053.2018.05.004] [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] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The emergence of advertising images in Chinese medicine works during the period of China is the inevitable outcome of the development of commercial society. In the 237 advertising images, there are 106 pictures, 130 ink lines and 1 color photograph. It can be divided into 8 categories: chemist's shop, hospital, medical products, Chinese medicine school and organizations, book, book publishers, commodity and public service. It can reflect the popular themes of the society and social atmosphere at that time, having vivid characteristics of the times and artistry. Advertising image is a unique phenomenon in the books of the Republic of China.
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Affiliation(s)
- H Geng
- China Institute for History of Medicine and Medical Literature, China Academy of Chinese Medical Sciences, 100700, China
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Geng H, Cho E, Qureshi A, Li W. 284 Hair color and risk of keratinocyte carcinoma in US women and men. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.03.290] [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: 11/16/2022]
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Su J, Li ZQ, Cui S, Ji LH, Chai KX, Geng H, Ma XJ, Yang YZ, Bai ZZ, Ge RL. [The expressions of VEGF and VEGFR signaling pathway in the bone marrow mononuclear cells with chronic mountain sickness]. Zhonghua Yi Xue Za Zhi 2018; 98:1088-1092. [PMID: 29690721 DOI: 10.3760/cma.j.issn.0376-2491.2018.14.008] [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] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: This study was aimed at investigating the levels and relationships of vascular endothelial growth factor (VEGF) and its receptor(VEGFR) in the bone marrow mononuclear cells (MNC) of chronic mountain sickness (CMS). Methods: A total of 34 patients with CMS and 30 controls residing at altitudes of 3 000-4 500 m were recruited for this study. The levels of VEGF, VEGFR1 and VEGFR2 in bone marrow MNC were detected by flow cytometry technique and RT-qPCR. Results: The percentage of VEGFR2 positive cells in the bone marrow MNC of CMS were higher than that of the controls[20.7% (8.1%, 67.6%) vs 8.1% (2.2%, 14.9%), P<0.05], but that of VEGFR1-positive and VEGF-positive were similar in CMS and controls. The mRNA levels of VEGFR2 were higher in the bone marrow MNC of CMS than in the controls[1.7(1.0, 5.1) vs 1.0(0.4, 2.7), P<0.05], while VEGF and VEGFR1 mRNA levels were similar between the two groups. The percentage of VEGFR2 positive cells in CMS were significantly correlated with hemoglobin (r=0.453, P=0.007) and the percentage of VEGF-positive cells (r=0.373, P=0.030). Conclusions: Bone marrow MNC of CMS may show enhanced activity of the VEGF-VEGFR2 pathway, and it appears to be involved in the pathogenesis of CMS.
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Affiliation(s)
- J Su
- Research Center for High Altitude Medicine, Qinghai University; Department of Hematology and Rheumatology, Qinghai University Affiliated Hospital, Xining 810001, China
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Geng H, Lam W, Kong C, Yang B, Yu S, Cheung K. EP-1905: Influence of metallic implant on different dose calculation algorithms in Cyberknife planning system. Radiother Oncol 2018. [DOI: 10.1016/s0167-8140(18)32214-x] [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: 10/14/2022]
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Giaddui T, Geng H, Chen Q, Linnemann N, Radden M, Lee N, Xia P, Xiao Y. Establishing an Offline Evaluation Process for IMRT/VMAT Radiation Therapy Treatment Planning Quality Using Knowledge-Based Planning: A Study Based on Multi-institutional Head and Neck Clinical Trial. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.2199] [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: 11/30/2022]
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Zhong H, Boimel P, Fan Y, Wang J, Geng H, Huang M, Cheng C, Rosen M, Ben-Josef E, Xiao Y. Predicting Overall Survival of Local Advanced Rectal Cancer Patients Treated With Neoadjuvant Chemoradiation Therapy by Radiomic Features Extracted From Planning CTs. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.1095] [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: 10/18/2022]
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Geng H, Giaddui T, Zhong H, Rosenthal D, Galvin J, Xiao Y, Linnemann N. Knowledge Engineering-Based Quality Evaluation of NRG Oncology RTOG 0522 Treatment Plans. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.439] [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: 10/18/2022]
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Kong C, Geng H, Ho Y, Lam W, Wong W, Lee T, Lee M, Cheung K, Yu S. The Effect of Lead Heterogeneity on the Commercial Electron Monte Carlo Dose Calculation for High Energy Electron Beam. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.2241] [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: 10/18/2022]
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Geng H, Zhong H, Giaddui T, Liao Z, Bradley J, Gillin M, Mohan R, Nguyen Q, Berman A, Robinson C, Hoppe B, Willers H, Shepherd A, Xiao Y, Presley J. Knowledge Engineering–Based Quality Evaluation of RTOG 1308 Proton Treatment plans. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.2197] [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: 10/18/2022]
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Zhong H, van Soest J, Wang J, Valentini V, Geng H, Huang M, Cheng C, Garofalo M, Hong T, Lerma F, Keech J, Anne P, Perera F, Oldenburg N, Parikh P, DeNittis A, Zaki B, Nowlan A, Zhang B, Dekker A, Zhang Z, Xiao Y. External Validation of the European Rectal Cancer Prognosis Model Using NRG Oncology RTOG 0822 Clinical Trial Data. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.1094] [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: 11/26/2022]
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Geng H, Chen Q, Zhong H, Giaddui T, Liao Z, Bradley J, Gillin M, Presley J, Mohan R, Nguyen Q, Berman A, Hoppe B, Wu A, Choi N, Robinson C, Xiao Y. Knowledge Engineering–Based Quality Evaluation of RTOG 1308 Photon Treatment Plans. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.2198] [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: 10/18/2022]
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Zhong H, Guttmann D, Huang M, Geng H, Cheng C, Kong F, Machtay M, Brock K, Xiao Y. Evaluating the Feasibility of Applying Deformable Registration Into Adaptive Therapy for NRG Oncology RTOG 1106. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.1822] [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: 10/18/2022]
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Geng H, Luo W, Deng WY, Sheng L, Shen R, Xing DY. Theory of Inverse Edelstein Effect of The Surface States of A Topological Insulator. Sci Rep 2017; 7:3755. [PMID: 28623269 PMCID: PMC5473866 DOI: 10.1038/s41598-017-03346-z] [Citation(s) in RCA: 7] [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: 02/07/2017] [Accepted: 04/27/2017] [Indexed: 11/24/2022] Open
Abstract
The surface states of three-dimensional topological insulators possess the unique property of spin-momentum interlocking. This property gives rise to the interesting inverse Edelstein effect (IEE), in which an applied spin bias μ is converted to a measurable charge voltage difference V. We develop a semiclassical theory for the IEE of the surface states of Bi2Se3 thin films, which is applicable from the ballistic regime to diffusive regime. We find that the efficiency of the spin-charge conversion, defined as γ = V/μ, exhibits a universal dependence on the ratio between sample size and electron mean free path. The efficiency increases from γ = π/4 in the ballistic limit to γ = π in the diffusive limit, suggesting that sufficient strength of impurity scattering is favorable for the IEE.
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Affiliation(s)
- H Geng
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China
| | - W Luo
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China
| | - W Y Deng
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China
| | - L Sheng
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China.
- Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.
| | - R Shen
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - D Y Xing
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
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Geng H, Ghiaasiaan SM. Mechanistic Modeling of Critical Flow of Initially Subcooled Liquid Containing Dissolved Noncondensables Through Cracks and Slits Based on the Homogeneous Equilibrium Mixture Method. NUCL SCI ENG 2017. [DOI: 10.13182/nse98-a1983] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- H. Geng
- Georgia Institute of Technology G. W. Woodruff School of Mechanical Engineering Atlanta, Georgia 30332-0405
| | - S. M. Ghiaasiaan
- Georgia Institute of Technology G. W. Woodruff School of Mechanical Engineering Atlanta, Georgia 30332-0405
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Chiu T, Yang B, Geng H, Lam W, Kong C, Cheung K, Yu S. PV-0187: Source dwell time and transit time measurement for a HDR afterloading unit. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)30630-8] [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: 10/19/2022]
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42
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Geng H, Cho E, Drucker A, Parulkar I, Qureshi A, Li W. 193 Reproductive and hormonal factors and risk of rosacea in US women. J Invest Dermatol 2017. [DOI: 10.1016/j.jid.2017.02.208] [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: 10/19/2022]
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Yang B, Chiu T, Cheung C, Geng H, Lam W, Cheung K, Yu S. PO-0909: QA test of MLC speed using a fluorescent screen-CCD based dosimetry system. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)31346-4] [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: 10/19/2022]
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Yang B, Wong WKR, Geng H, Lam WW, Ho YW, Kwok WM, Cheung KY, Yu SK. Filmless methods for quality assurance of Tomotherapy using ArcCHECK. Med Phys 2017; 44:7-16. [PMID: 28044341 DOI: 10.1002/mp.12009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 05/30/2016] [Revised: 10/15/2016] [Accepted: 11/08/2016] [Indexed: 11/07/2022] Open
Abstract
PURPOSE Tomotherapy delivers an intensity-modulated radiation therapy (IMRT) treatment by the synchronization of gantry rotation, multileaf collimator (MLC), and couch movement. This dynamic nature makes the quality assurance (QA) important and challenging. The purpose of this study is to develop some methodologies using an ArcCHECK for accurate QA measurements of the gantry angle and speed, MLC synchronization and leaf open time, couch translation per gantry rotation, couch speed and uniformity, and constancy of longitudinal beam profile for a Tomotherapy unit. METHODS Four test plans recommended by AAPM Task Group 148 (TG148) and the manufacturer were chosen for this study. Helical and static star shot tests are used for checking the leaves opened at the expected gantry angles. Another helical test is to verify the couch traveled the expected distance per gantry rotation. The final test is for checking the couch speed constancy with a static gantry. ArcCHECK can record the detector signal every 50 ms as a movie file, and has a virtual inclinometer for gantry angle measurement. These features made the measurement of gantry angle and speed, MLC synchronization and leaf open time, and longitudinal beam profile possible. A shaping parameter was defined for facilitating the location of the beam center during the plan delivery, which was thereafter used to calculate the couch translation per gantry rotation and couch speed. The full width at half maximum (FWHM) was calculated for each measured longitudinal beam profile and then used to evaluate the couch speed uniformity. Furthermore, a mean longitudinal profile was obtained for constancy check of field width. The machine trajectory log data were also collected for comparison. Inhouse programs were developed in MATLAB to process both the ArcCHECK and machine log data. RESULTS The deviation of our measurement results from the log data for gantry angle was calculated to be less than 0.4°. The percentage differences between measured and planned leaf open time were found to be within 0.5% in all the tests. Our results showed mean values of MLC synchronization of 0.982, 0.983, and 0.995 at static gantry angle 0°, 45°, and 135°, respectively. The mean value of measured couch translation and couch speed by ArcCHECK had less than 0.1% deviation from the planned values. The variation in the value of FWHM suggested the couch speed uniformity was better than 1%. The mean of measured longitudinal profiles was suitable for constancy check of field width. CONCLUSION Precise and efficient methods for measuring the gantry angle and speed, leaf open time, couch translation per gantry rotation, couch speed and uniformity, and constancy of longitudinal beam profile of Tomotherapy using ArcCHECK have been developed and proven to be accurate compared with machine log data. Estimation of the Tomotherapy binary MLC leaf open time is proven to be precise enough to verify the leaf open time as small as 277.8 ms. Our method also makes the observation and quantification of the synchronization of leaves possible.
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Affiliation(s)
- B Yang
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - W K R Wong
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - H Geng
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - W W Lam
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - Y W Ho
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - W M Kwok
- Biomedical Engineering Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - K Y Cheung
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - S K Yu
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
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Yang B, Geng H, Kong CW, Lam WW, Cheung KY, Yu SK. Dose rate versus gantry speed test in RapidArc commissioning: a feasibility study using ArcCHECK. Biomed Phys Eng Express 2016. [DOI: 10.1088/2057-1976/aa5196] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Li N, Zhang YZ, Li DD, Niu YH, Liu J, Li SX, Yuan YZ, Chen SL, Geng H, Liu DL. Erratum to: “Overexpression, Homology Modeling and Coenzyme Docking Studies of the Cytochrome P450nor2 from Cylindrocarpon tonkinense” [Molecular Biology 50, 320 (2016)]. Mol Biol 2016. [DOI: 10.1134/s0026893316050198] [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: 11/23/2022]
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Li YW, Cheng J, Wang H, Zhao F, Li XX, Tao WW, Bi XL, Jin J, Ding Y, Geng H. [Spatial-temporal analysis of pulmonary tuberculosis in Shandong province, 2015]. Zhonghua Liu Xing Bing Xue Za Zhi 2016; 37:1257-1261. [PMID: 27655574 DOI: 10.3760/cma.j.issn.0254-6450.2016.09.015] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To analyze the spatial-temporal epidemiological characteristics of active pulmonary tuberculosis (PTB) and sputum smear positive (SS+) PTB in Shandong province, China, 2015. Methods: The surveillance data of active PTB and SS+PTB in Shandong in 2015 were collected and analyzed by using the global and local indicators of spatial association (Moran's I) for the spatial autocorrelation of PTB, and by using SaTScan forspatial-temporal clustering characteristics of PTB based on geographic information system. Results: Totally, 31 776 active PTB cases and 8 631 SS+PTB cases were reported in Shandong in 2015, and the reported incidence rates of active PTB and SS+PTB were 33.09/100 000 and 8.99/100 000, respectively. Active PTB had positive spatial autocorrelation at county level, and the value of Moran's I value was 0.219 (P<0.001), indicating that the high-high (HH) aggregation areas with high incidence were in the northwestern, southeastern and central southern Shandong; SS+PTB also had positive spatial autocorrelation at county level, and the value of the Moran's I was 1.178 (P<0.001), indicating that the HH aggregation areas with high incidence were in the southeastern and northwestern Shandong. The results of spatial-temporal scanning indicated that there was incidence clustering of active PTB in the second quarter and the third quarter in 2015, and the clustering areas were in the central southern, southeastern and northwestern Shandong; there also was incidence clustering of SS+PTB in the second quarter and the third quarter in 2015, and the clustering areas were in the southeastern and northwestern Shandong. Conclusions: The incidence of active PTB and SS+PTB showed spatial and temporal clustering in Shandong in 2015. The areas with high PTB burden and high PTB transmission risks were in the northwestern and southeastern Shandong. The areas with high PTB burden but without high PTB transmission risks were in the central southern Shandong.
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Affiliation(s)
- Y W Li
- Center for Tuberculosis Control and Prevention, Shandong Provincial Chest Hospital, Jinan 250101, China
| | - J Cheng
- Center for Tuberculosis Control and Prevention, Shandong Provincial Chest Hospital, Jinan 250101, China
| | - H Wang
- Outpatient Department, Qilu Hospital of Shandong University, Jinan 250012, China
| | - F Zhao
- National Center for Tuberculosis Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - X X Li
- National Center for Tuberculosis Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - W W Tao
- Center for Tuberculosis Control and Prevention, Shandong Provincial Chest Hospital, Jinan 250101, China
| | - X L Bi
- Center for Tuberculosis Control and Prevention, Shandong Provincial Chest Hospital, Jinan 250101, China
| | - J Jin
- Center for Tuberculosis Control and Prevention, Shandong Provincial Chest Hospital, Jinan 250101, China
| | - Y Ding
- Center for Tuberculosis Control and Prevention, Shandong Provincial Chest Hospital, Jinan 250101, China
| | - H Geng
- Center for Tuberculosis Control and Prevention, Shandong Provincial Chest Hospital, Jinan 250101, China
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Li N, Zhang YZ, Li DD, Niu YH, Liu J, Li SX, Yuan YZ, Chen SL, Geng H, Liu DL. [Overexpression, homology modeling and coenzyme docking studies of the cytochrome P450nor2 from Cylindrocarpon tonkinense]. Mol Biol (Mosk) 2016; 50:368-75. [PMID: 27239859 DOI: 10.7868/s0026898416020142] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2015] [Accepted: 08/08/2015] [Indexed: 11/23/2022]
Abstract
Cytochrome P450nor catalyzes an unusual reaction that transfers electrons from NADP/NADPH to bound heme directly. To improve the expression level of P450nor2 from Cylindrocarpon tonkinense (C.P450nor2), Escherichia coli system was utilized to substitute the yeast system we constructed for expression of the P450nor2 gene, and the protein was purified in soluble form using Ni(+)-NTA affinity chromatography. In contrast to P450nor from Fusarium oxysporum (F.P450nor) and P450nor1 from Cylindrocarpon tonkinense (C.P450nor1), C.P450nor2 shows a dual specificity for using NADH or NADPH as electron donors. The present study developed a computational approach in order to illustrate the coenzyme specificity of C.P450nor2 for NADH and NADPH. This study involved homology modeling of C.P450nor2 and docking analyses of NADH and NADPH into the crystal structure of F.P450nor and the predictive model of C.P450nor2, respectively. The results suggested that C.P450nor2 and F.P450nor have different coenzyme specificity for NADH and NADPH; whilst the space around the B'-helix of the C.P450nor2, especially the Ser79 and Gly81, play a crucial role for the specificity of C.P450nor2. In the absence of the experimental structure of C.P450nor2, we hope that our model will be useful to provide rational explanation on coenzyme specificity of C.P450nor2.
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Affiliation(s)
- N Li
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Science, Central China Normal University, Wuhan, 430079, China.,Key Laboratory of Crops with High Quality and Efficient Cultivation and Security Control, Yunnan Higher Education Institutions, College of Life Science and Technology, Honghe University, Mengzi, 661100, China
| | - Y Z Zhang
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Science, Central China Normal University, Wuhan, 430079, China
| | - D D Li
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Science, Central China Normal University, Wuhan, 430079, China
| | - Y H Niu
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Science, Central China Normal University, Wuhan, 430079, China
| | - J Liu
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Science, Central China Normal University, Wuhan, 430079, China
| | - S X Li
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Science, Central China Normal University, Wuhan, 430079, China
| | - Y Z Yuan
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Science, Central China Normal University, Wuhan, 430079, China
| | - S L Chen
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Science, Central China Normal University, Wuhan, 430079, China
| | - H Geng
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Science, Central China Normal University, Wuhan, 430079, China
| | - D L Liu
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Science, Central China Normal University, Wuhan, 430079, China.,
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Yang B, Wong R, Lam W, Geng H, Cheung K, Yu S. SU-F-T-456: Tomotherapy MLC Synchronization and Leaf Open Time Measurements Using ArcCheck. Med Phys 2016. [DOI: 10.1118/1.4956641] [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: 11/07/2022] Open
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Chiu T, Yang B, Law M, Lam W, Kong C, Geng H, Cheung K, Yu S. SU-F-T-548: An Extraction Method for Correction of Detector Volume Effect in Small Field Profile Measurement. Med Phys 2016. [DOI: 10.1118/1.4956733] [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: 11/07/2022] Open
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