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Qin J, Zhang S, Poon L, Pan Z, Luo J, Yu N, Wang L, Wu X, Cheng X, Xie X, Lu Y, LU W. Doppler-based predictive model for methotrexate resistance in low-risk gestational trophoblastic neoplasia with myometrial invasion: prospective study of 147 patients. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2021; 57:829-839. [PMID: 32385928 PMCID: PMC8251727 DOI: 10.1002/uog.22069] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 03/30/2020] [Accepted: 04/22/2020] [Indexed: 06/11/2023]
Abstract
OBJECTIVES This prospective clinical study aimed to evaluate the vascularization characteristics of low-risk gestational trophoblastic neoplasia (GTN) using Doppler imaging and to develop a predictive model for resistance to methotrexate (MTX). METHODS Patients with low-risk GTN receiving primary MTX treatment were enrolled from the Women's Hospital, Zhejiang University School of Medicine, Hangzhou, China, from September 2012 to August 2018. The primary endpoint was to develop and internally validate a predictive model for resistance to MTX therapy in these patients. In the training set, clinical features and Doppler hemodynamic parameters before MTX therapy were analyzed using logistic regression to identify independent predictors of MTX resistance, which were integrated into the model. The predictive performance of the model was evaluated by leave-one-out cross-validation in the training dataset and internal validation in an independent-sample test dataset. RESULTS The entire imaging protocol was completed by 147 eligible patients, of which 110 comprised the training set and 37 the test set. In the training set, cases with myometrial invasion (81.8%; 90/110) showed vascular-enriched areas in the myometrium and high velocity and low impedance ratios of the uterine artery (UtA) compared to cases without myometrial invasion (18.2%; 20/110). On multivariate logistic regression analysis, time-averaged mean velocity in UtA (UtA-TAmean) and the International Federation of Gynecology and Obstetrics (FIGO) score were identified as independent predictors (P = 0.009 and P = 0.043, respectively) of MTX resistance. The Doppler-based predictive model, developed based on the 90 cases with myometrial invasion, was y = -2.95332 + 0.41696 × FIGO score + 0.03551 × UtA-TAmean. The model showed an area under the curve of 0.757 (95% CI, 0.653-0.862) and the optimal cut-off value was 0.50622, which had 45.2% sensitivity and 96.6% specificity. The model stratified patients with low-risk GTN into low (< 10%), intermediate (10-90%) and high (> 90%) probability of MTX resistance, based on the threshold values of -1.59544 and 0.10046. The model had an accuracy of 74.4% (95% CI, 64.5-82.3%) in the cross-validation and 72.7% (95% CI, 55.8-84.9%) in the internal validation. CONCLUSIONS The Doppler-based predictive model, combining a non-invasive marker of tumor vascularity with the FIGO scoring system, can differentiate cases with low from those with high probability of developing MTX resistance and therefore has the potential to guide treatment options in patients with low-risk GTN and myometrial invasion. © 2020 Authors. Ultrasound in Obstetrics & Gynecology published by John Wiley & Sons Ltd on behalf of International Society of Ultrasound in Obstetrics and Gynecology.
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Burdorf L, Habibabady Z, Cerel B, Petitpas K, Laird C, Connolly M, Pratts S, Cheng X, Phelps C, Eyestone W, Ayares D, Pierson R, Azimzadeh A. Anti-Non Gal Antibody Binding in Pig-to-Baboon and Pig-to-Human Lung Transplantation Models is Reduced by β4GalKO. J Heart Lung Transplant 2021. [DOI: 10.1016/j.healun.2021.01.1865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Ma Z, Lu C, Zhu J, Cheng X, Tuo B, Liu X, Li T. Upregulation of SLC26A9 resulted in the development and progression of HER2-positive breast cancer via activating PI3 K/ AKT signaling pathway. Breast 2021. [DOI: 10.1016/s0960-9776(21)00108-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Li L, Liu L, Cheng X, Zhong H, Fang Y. P13.02 Role of Management Checklist in the Prevention and Control of NCP in Oncology Ward. J Thorac Oncol 2021. [PMCID: PMC7976944 DOI: 10.1016/j.jtho.2021.01.503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Song R, Cheng X, Lian B, Zhang X, Zhang J, Li K, Fu W. P33.05 Identifying Biomarkers of Immune Signature Related to Smoking and Overall Survival in NSCLC on Gene Co-Expression Network. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Yu M, Yang F, Cheng X. [Anti-inflammatory therapy of coronary heart disease: where is the way?]. ZHONGHUA XIN XUE GUAN BING ZA ZHI 2021; 49:111-114. [PMID: 33611895 DOI: 10.3760/cma.j.cn112148-20200923-00763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
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Cheng X, Wielenberg A, Hampel U, Starflinger J, Gupta S, Schaffrath A, Weyermann F. Summary of 3rd Sino-German symposium on fundamentals of advanced nuclear safety technology. KERNTECHNIK 2021. [DOI: 10.1515/kern-2020-850210] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The 3rd "Sino-German Symposium on Fundamentals of Advanced Nuclear Safety Technology (SG-FANS)" took place in Xi’an, China, in 2019. Common fields of interests have been identified on both Chinese and German side, such as code benchmarking, common access to experimental facilities and joint experimental data base for nuclear safety analyses.
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Song S, Cheng X, Li X, Kuang Z, Huang Y, Su Z. Exploring the Specificity of 3-Ketosteroid-Δ1-Dehydrogenase by use of Site-Directed Mutagenesis. Biophys J 2021. [DOI: 10.1016/j.bpj.2020.11.388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Li X, Cheng X, Han Y, Kuang Z, Huang Y, Su Z. Structural Investigation on the Substrate Specificity of Mycobacterial 3-Ketosteroid-1,2-Dehydrogenase. Biophys J 2021. [DOI: 10.1016/j.bpj.2020.11.944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Yang Z, Kuang Z, Wang R, Pi N, Cheng X, Huang Y, Su Z. Rational Design of Small Molecular GLP-1R Agonists. Biophys J 2021. [DOI: 10.1016/j.bpj.2020.11.422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Cheng X, Yang Z, Zhou J, Su Z. Exploring Effect of P53 Signal Transduction on MMS by Use of Premature Termination Codon Strategy. Biophys J 2021. [DOI: 10.1016/j.bpj.2020.11.1670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Cheng X, Li ZH, Lyu YB, Chen PL, Li FR, Zhong WF, Yang HL, Zhang XR, Shi XM, Mao C. [The relationship between resting heart rate and all-cause mortality among the Chinese oldest-old aged more than 80: a prospective cohort study]. ZHONGHUA YU FANG YI XUE ZA ZHI [CHINESE JOURNAL OF PREVENTIVE MEDICINE] 2021; 55:53-59. [PMID: 33355769 DOI: 10.3760/cma.j.cn112150-20200629-00944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore the association between resting heart rate(RHR) and all-cause mortality among the Chinese oldest-old aged more than 80. Methods: Using a total of seven surveys or follow-ups data (1998, 2000, 2002, 2005, 2008, 2011 and 2014) from the Chinese Longitudinal Healthy Longevity Survey (CLHLS). A total of 17 886 elderly over 80 years old were selected as subjects, their resting heart rate were measured though baseline survey and the survival outcome and death time of the subjects were followed up. The subjects were divided into 6 groups according to their resting heart rate. Cox regression model was used to estimate the effect of resting heart rate on mortality risk. The interaction of age, gender and resting heart rate was also analyzed by likelihood ratio test. Results: The age of subjects M (P25, P75) was 92 (86, 100) years old, including 10 531 females (58.9%) and there were 13 598 participants died, the mortality rate was 195.5 per 1 000 person-years. Multivariate Cox regression analysis showed that compared to the control group (60-69 pbm/min), the hazard ratio of the elderly are 1.06 (95%CI: 1.02, 1.11), 1.09 (95%CI: 1.04, 1.15), 1.23 (95%CI: 1.14, 1.34), 1.25 (95%CI: 1.08, 1.44) in the group of RHR between 70-79, 80-89, 90-99 and ≥100 pbm/min and P values are all less than 0.05. Likelihood ratio test showed that RHR and age had an interaction effect. (P for interaction=0.011). Conclusion: The risk of all-cause death increased with the increase of resting heart rate and this relationship was stronger between the 80-89 years old people.
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Yu Y, Hu L, Huang X, Zhou W, Bao H, Cheng X. BMI modifies the association between serum HDL cholesterol and stroke in a hypertensive population without atrial fibrillation. J Endocrinol Invest 2021; 44:173-181. [PMID: 32406023 DOI: 10.1007/s40618-020-01288-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Accepted: 04/30/2020] [Indexed: 12/22/2022]
Abstract
PURPOSE Both high-density lipoprotein cholesterol (HDL-C) and body mass index (BMI) have an impact on the prevalence of stroke. However, it is unclear whether BMI can modify the relationship between HDL-C and stroke. Therefore, we aimed to assess the effect of the BMI on the association between HDL-C and stroke in a hypertensive population without atrial fibrillation (AF). METHODS We analyzed data of 10,925 hypertensive patients without AF from the Chinese Hypertension Registry Study. BMI was categorized as < 24 and ≥ 24 kg/m2. Multivariate logistic regression and smooth curve fitting (penalized spline method) were used to analyze the association between HDL-C and stroke in different BMI groups. Subgroup analysis and interaction tests were used to explore the effect of other variables on this relationship. RESULTS The results showed a negative association between HDL-C and stroke in the BMI < 24 kg/m2 group, but HDL-C was not associated with stroke in the BMI ≥ 24 kg/m2 group. In the BMI < 24 kg/m2 group, each 1 mmol/L increase in HDL-C was associated with a 50% decreased risk of stroke [odds ratio (OR) 0.50, 95% confidence interval (CI) 0.38-0.66]. No significant relationship between HDL-C and stroke was observed in the BMI ≥ 24 kg/m2 group (OR 0.73, 95% CI 0.49-1.10). There was a significant interaction between BMI and HDL-C in regard to the prevalence of stroke in the hypertensive population without AF (PInteraction = 0.027). CONCLUSIONS We found an inverse association between HDL-C and stroke only in the BMI < 24 kg/m2 group. The finding suggested that BMI could modify the association between HDL-C and stroke in hypertensive populations without AF.
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Cheng X, Zhang M, Xue Y, Sun H, Liu Q, Shi XF. [Effect of tissue inhibitor of metalloproteinase-1 and 2 siRNA on the expression of smad2/3/4 protein in hepatic stellate cells]. ZHONGHUA GAN ZANG BING ZA ZHI = ZHONGHUA GANZANGBING ZAZHI = CHINESE JOURNAL OF HEPATOLOGY 2020; 28:753-759. [PMID: 33053975 DOI: 10.3760/cma.j.cn501113-20190904-00323] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To study the effect of tissue inhibitor of metalloproteinases (TIMP)-1 siRNA and TIMP-2 siRNA on the expression of smad2/3/4 protein in CCl4-induced liver fibrosis rat hepatic stellate cells (HSC). Methods: Rat's liver tissues with liver fibrosis after treatment with pre-built TIMP-1siRNA and TIMP-2 siRNA were used as the research subjects. Immunohistochemistry, Western blotting and real-time PCR were used to detect the protein and corresponding mRNA expression levels on smad2/3/4. TUNEL and α-smooth muscle actin (α-SMA) positive cells were quantified by double-labeled immunofluorescence. Analysis of variance (ANOVA) was used to compare the means between multiple groups, and the SNK test was used for the pairwise comparison of means. Results: The results of immunohistochemistry showed that the protein expressions of smad2, smad3, and smad4 in the TIMP-1 siRNA group and TIMP-2 siRNA group were significantly reduced than those of the model and the negative control group (P < 0.05). In addition, Western blotting results had also shown the same trend. The protein expression of smad2, smad3, and smad4 in the TIMP-1siRNA group and TIMP-2siRNA group were significantly reduced than those of the model and the negative control group (P < 0.01). The mRNA expression of smad2, smad3, and smad4 in TIMP-1siRNA group and TIMP-2siRNA group was significantly reduced than those of the model and negative control group (P < 0.05). Immunofluorescence showed that the apoptosis of activated HSC in the TIMP-1 siRNA group(0.014 3 ± 0.002 4) and TIMP-2 siRNA group(0.010 7 ± 0.004 4) was increased than those of the model(0) and the negative control group (0.002 4 ± 0.002 4, P < 0.05). Conclusion: TIMP-1 siRNA and TIMP-2 siRNA promote the apoptosis of activated HSCs. In addition, it also has a significant inhibitory effect on the expression of smad protein.
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Cheng X, Zhou MT, Tang L, Wang GY. Same pandemic but different studies: an exploration of COVID-19 research at the early stage. EUROPEAN REVIEW FOR MEDICAL AND PHARMACOLOGICAL SCIENCES 2020; 24:12545-12557. [PMID: 33336775 DOI: 10.26355/eurrev_202012_24052] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE Scientific research is an essential necessity for the prevention and control of COVID-19. Accelerated paper-sharing makes it possible to explore the responses of scientific communities of different countries and their research focus. This is achieved by examining relevant publications during the early stage of the pandemic. This paper explores a timely research assessment on COVID-19 among China, USA, and EU. MATERIALS AND METHODS Papers indexed in PubMed and published from December 30, 2019, to March 11, 2020, were selected. Papers from China, USA, and EU were assessed by calculating the significance of items in the co-occurrence exported from VOSviewer. RESULTS The results showed that Chinese studies focus more on clinical manifestations, while USA and EU focus on experimental research. Furthermore, US research is more geared toward detection techniques and mathematical models, China focuses more on monitoring the epidemic situation, and EU engages in both. CONCLUSIONS This paper argues that the above distinctions are caused by differences in the stages of epidemic development, researchers' experience bases for formulating measures, traditions within the different medical cultures, and the distinction between "information" and "knowledge".
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Cai L, Cheng X, Qin J, Xu W, You M. Expression, purification and characterization of three odorant binding proteins from the diamondback moth, Plutella xylostella. INSECT MOLECULAR BIOLOGY 2020; 29:531-544. [PMID: 32715559 DOI: 10.1111/imb.12664] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 06/13/2020] [Accepted: 07/18/2020] [Indexed: 06/11/2023]
Abstract
Odorant binding proteins (OBPs) are critical components in insect olfactory systems where they bind, solubilize and transport odorant molecules to receptors. Here, we cloned three OBPs (PxylGOBP1, PxylGOBP2 and PxylOBP24) from the diamondback moth, Plutella xylostella, one of the most destructive pests of cruciferous crops. These three OBPs were expressed in Escherichia coli as recombinant proteins, purified and characterized by fluorescence binding assays with 39 ligands including sex pheromone and plant-derived chemical compounds. PxylGOBP1 and PxylGOBP2 showed significantly different binding affinities to theses ligands, suggesting distinct binding preferences of these two general odorant binding proteins. PxylOBP24 showed no or extremely low binding activities to selected ligands, suggesting it may be involved in non-olfactory functions. Circular dichroism spectral results demonstrated that PxylGOBP1 and PxylGOBP2 shared similar secondary structures while PxylOBP24 was significantly different. This study improves our knowledge of insect OBPs, which will assist in a better understanding of insect olfactory system and developing more environmentally friendly pest control strategies for P. xylostella.
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Li Q, Chen M, Cao M, Yuan G, Hu X, Dai W, Zang M, Cheng X, Huang J, Hou J, Chen J. 182P Lenvatinib (LEN) plus anti-PD-1 antibodies vs LEN alone for advanced hepatocellular carcinoma (HCC): A real-world study. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.10.203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Yang WL, Dai ZL, Cheng X, Fan ZX, Jiang HY, Dai YJ. Biotransformation of insecticide flonicamid by Aminobacter sp. CGMCC 1.17253 via nitrile hydratase catalysed hydration pathway. J Appl Microbiol 2020; 130:1571-1581. [PMID: 33030814 DOI: 10.1111/jam.14880] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 09/10/2020] [Accepted: 09/28/2020] [Indexed: 12/11/2022]
Abstract
AIMS This study evaluates flonicamid biotransformation ability of Aminobacter sp. CGMCC 1.17253 and the enzyme catalytic mechanism involved. METHODS AND RESULTS Flonicamid transformed by resting cells of Aminobacter sp. CGMCC 1.17253 was carried out. Aminobacter sp. CGMCC 1.17253 converts flonicamid into N-(4-trifluoromethylnicotinoyl) glycinamide (TFNG-AM). Aminobacter sp. CGMCC 1.17253 transforms 31·1% of the flonicamid in a 200 mg l-1 conversion solution in 96 h. Aminobacter sp. CGMCC 1.17253 was inoculated in soil, and 72·1% of flonicamid with a concentration of 0·21 μmol g-1 was transformed in 9 days. The recombinant Escherichia coli expressing Aminobacter sp. CGMCC 1.17253 nitrile hydratase (NHase) and purified NHase were tested for the flonicamid transformation ability, both of them acquired the ability to transform flonicamid into TFNG-AM. CONCLUSIONS Aminobacter sp. CGMCC 1.17253 transforms flonicamid into TFNG-AM via hydration pathway mediated by cobalt-containing NHase. SIGNIFICANCE AND IMPACT OF THE STUDY This is the first report that bacteria of genus Aminobacter has flonicamid-transforming ability. This study enhances our understanding of flonicamid-degrading mechanism. Aminobacter sp. CGMCC 1.17253 has the potential for bioremediation of flonicamid pollution.
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Fan Y, Gao W, Li J, Fan F, Qin X, Liu L, Cheng X, Xu X, Wang X, Wang B, Huo Y. Effect of the baseline pulse wave velocity on short term and long term blood pressure control in primary hypertension. Int J Cardiol 2020; 317:193-199. [PMID: 32505371 DOI: 10.1016/j.ijcard.2020.02.059] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 01/30/2020] [Accepted: 02/23/2020] [Indexed: 11/27/2022]
Abstract
OBJECTIVES Arterial stiffness may affect antihypertensive response to antihypertensive treatment. However, sufficient clinical evidence is lacking. This longitudinal study aimed to evaluate the effect of baseline arterial stiffness measured by the brachial-ankle pulse wave velocity (baPWV) on response to short-term and long-term enalapril-based treatment in 3310 hypertensive adults from the China Stroke Primary Prevention Trial (CSPPT). METHODS AND RESULTS Blood pressure (BP) measured at three months (short-term) in 2780 subjects, and the time-average on-treatment BP in 3310 subjects during a median of 4.5-year follow-ups (long-term) were analyzed in the study. After short-term antihypertensive treatment, every 1 m/s increase in baPWV denoted a 7% and 6% decreased chance of achieving systolic BP (SBP) control (odds ratio (OR), 0.93; 95% CI 0.90, 0.96; P < 0.001) and BP control (OR, 0.94; 95% CI 0.91, 0.97; P < 0.001), respectively, after adjustment for age, gender and other variables. After long-term treatment, every 1 m/s increase in baPWV posed an 7% and 6% greater risk of failing to attain SBP control (OR, 0.93; 95% CI 0.90, 0.95; P < 0.001) and BP control (OR, 0.94; 95% CI, 0.92, 0.96; P < 0.001), respectively, not regarding for DBP control after both short- and long-term treatment. Higher baseline baPWV significantly decreased SBP reduction both after three months and the median 4.5-year treatment, while increased DBP reduction after the median 4.5-year treatment. CONCLUSIONS Elevated baseline baPWV significantly decreased BP response to short-and long-term treatment in adults with primary hypertensive. Arterial stiffness improvement may be an essential target to achieve adequate BP control.
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Wang H, Song S, Peng F, Yang F, Chen T, Li X, Cheng X, He Y, Huang Y, Su Z. Whole-genome and enzymatic analyses of an androstenedione-producing Mycobacterium strain with residual phytosterol-degrading pathways. Microb Cell Fact 2020; 19:187. [PMID: 33008397 PMCID: PMC7532642 DOI: 10.1186/s12934-020-01442-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Accepted: 09/25/2020] [Indexed: 01/29/2023] Open
Abstract
Mycobacterium neoaurum strains can transform phytosterols to 4-androstene-3,17-dione (4-AD), a key intermediate for the synthesis of advanced steroidal medicines. In this work, we presented the complete genome sequence of the M. neoaurum strain HGMS2, which transforms β-sitosterol to 4-AD. Through genome annotation, a phytosterol-degrading pathway in HGMS2 was predicted and further shown to form a 9,10-secosteroid intermediate by five groups of enzymes. These five groups of enzymes included three cholesterol oxidases (ChoM; group 1: ChoM1, ChoM2 and Hsd), two monooxygenases (Mon; group 2: Mon164 and Mon197), a set of enzymes for side-chain degradation (group 3), one 3-ketosteroid-1,2-dehydrogenase (KstD; group 4: KstD211) and three 3-ketosteroid-9a-hydroxylases (Ksh; group 5: KshA226, KshA395 and KshB122). A gene cluster encoding Mon164, KstD211, KshA226, KshB122 and fatty acid β-oxidoreductases constituted one integrated metabolic pathway, while genes encoding other key enzymes were sporadically distributed. All key enzymes except those from group 3 were prepared as recombinant proteins and their activities were evaluated, and the proteins exhibited distinct activities compared with enzymes identified from other bacterial species. Importantly, we found that the KstD211 and KshA395 enzymes in the HGMS2 strain retained weak activities and caused the occurrence of two major impurities, i.e., 1,4-androstene-3,17-dione (ADD) and 9-hydroxyl-4-androstene-3,17-dione (9OH-AD) during β-sitosterol fermentation. The concurrence of these two 4-AD analogs not only lowered 4-AD production yield but also hampered 4-AD purification. HGMS2 has the least number of genes encoding KstD and Ksh enzymes compared with current industrial strains. Therefore, HGMS2 could be a potent strain by which the 4-AD production yield could be enhanced by disabling the KstD211 and KshA395 enzymes. Our work also provides new insight into the engineering of the HGMS2 strain to produce ADD and 9OH-AD for industrial application.
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Wang L, Ma Y, Cheng X. Loss of X chromosome inactivation in monospermic complete hydatidiform moles with 46, XX karyotype. Gynecol Oncol 2020. [DOI: 10.1016/j.ygyno.2020.06.068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Xie X, Shen Y, Tang S, Cheng X, Lv W, Wan X, Chen Z. Intraperitoneal chemotherapy as first-line treatment of newly diagnosed advanced epithelial ovarian cancer: Two centers' data in China. Gynecol Oncol 2020. [DOI: 10.1016/j.ygyno.2020.05.649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Xie X, Jin L, Tang S, Shen Y, Cheng X, Lv W, Wan X, Chen Z. What influences the long-term survival of advanced high-grade serous ovarian cancer? Gynecol Oncol 2020. [DOI: 10.1016/j.ygyno.2020.05.646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Xie X, Tang S, Jin L, Shen Y, Cheng X, Lv W, Wan X, Chen Z. Secondary cytoreduction in relapsed serous ovarian cancer: Who really benefits? Gynecol Oncol 2020. [DOI: 10.1016/j.ygyno.2020.05.630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Albone E, Cheng X, Verdi A, Jacob S, Fernando S, Furuuchi K, Fulmer J, Soto A, Drozdowski B, Mano Y, Nakatani Y, Uenaka T. 579P MORAb-109: A site-specific eribulin-conjugated ADC targeting human mesothelin. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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