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Liu Y, Zhu FM, Xu J, Deng YP, Sun J, He QY, Cheng ZY, Tang MM, Yang J, Fu L, Zhao H. Arsenic exposure and pulmonary function decline: Potential mediating role of TRAIL in chronic obstructive pulmonary disease patients. J Trace Elem Med Biol 2024; 83:127415. [PMID: 38377659 DOI: 10.1016/j.jtemb.2024.127415] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 02/08/2024] [Accepted: 02/16/2024] [Indexed: 02/22/2024]
Abstract
BACKGROUND Environmental arsenic (As) exposure is strongly related to the progression of chronic obstructive pulmonary disease (COPD). Pulmonary epithelial cells apoptosis is implicated in the pathophysiological mechanisms of COPD. However, the role of tumor necrosis factor-related apoptosis-inducing ligand (TRAIL), one biomarker of apoptosis, remains unclear in As-mediated pulmonary function alternations in COPD patients. METHODS This study included 239 COPD patients. The serum level of tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) was measured by enzyme-linked immunosorbent assay (ELISA). The blood As level was determined through inductively coupled plasma mass spectrometry (ICP-MS). RESULTS Blood As levels exhibited a negative and dose-dependent correlation with pulmonary function. Per unit elevation of blood arsenic concentrations was related to reductions of 0.339 L in FEV1, 0.311 L in FVC, 1.171% in FEV1/FVC%, and 7.999% in FEV1% in COPD subjects. Additionally, a positive dose-response correlation of blood As with serum TRAIL was found in COPD subjects. Additionally, the level of serum TRAIL was negatively linked to lung function. Elevated TRAIL significantly mediated As-induced decreases of 11.05%, 13.35%, and 31.78% in FVC, FEV1, and FEV1%, respectively among the COPD patients. CONCLUSION Blood As level is positively correlated with pulmonary function decline and serum TRAIL increase in individuals with COPD. Our findings suggest that elevated TRAIL levels may serve as a mediating mechanism through which As contributes to declining lung function in COPD patients.
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Affiliation(s)
- Ying Liu
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China; Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China; Center for Big Data and Population Health of IHM, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China
| | - Feng-Min Zhu
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China; Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China
| | - Juan Xu
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China; Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China
| | - You-Peng Deng
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China; Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China
| | - Jing Sun
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China; Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China
| | - Qi-Yuan He
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China; Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China
| | - Zhen-Yu Cheng
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China; Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China
| | - Min-Min Tang
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China; Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China
| | - Jin Yang
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China; Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China
| | - Lin Fu
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China; Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China
| | - Hui Zhao
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China; Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China; Center for Big Data and Population Health of IHM, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China.
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Liu Y, Zhu FM, Xu J, Deng YP, Sun J, He QY, Cheng ZY, Tang MM, Yang J, Fu L, Zhao H. Corrigendum to "Arsenic exposure and pulmonary function decline: Potential mediating role of TRAIL in chronic obstructive pulmonary disease patients" [J. Trace Elem. Med. Biol. 83 (2024) 127415]. J Trace Elem Med Biol 2024; 83:127418. [PMID: 38412783 DOI: 10.1016/j.jtemb.2024.127418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Affiliation(s)
- Ying Liu
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China; Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China; Center for Big Data and Population Health of IHM, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China
| | - Feng-Min Zhu
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China; Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China
| | - Juan Xu
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China; Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China
| | - You-Peng Deng
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China; Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China
| | - Jing Sun
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China; Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China
| | - Qi-Yuan He
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China; Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China
| | - Zhen-Yu Cheng
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China; Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China
| | - Min-Min Tang
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China; Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China
| | - Jin Yang
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China; Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China.
| | - Lin Fu
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China; Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China.
| | - Hui Zhao
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China; Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China; Center for Big Data and Population Health of IHM, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China.
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Wang M, Fan XM, Wang QL, Cao YK, Ma CY, He QY, Zhang HT. [The value of quantitative flow ratio in the hemodynamic evaluation of myocardial bridge]. Zhonghua Xin Xue Guan Bing Za Zhi 2024; 52:165-171. [PMID: 38326068 DOI: 10.3760/cma.j.cn112148-20231008-00246] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 02/09/2024]
Abstract
Objective: To explore the application value of quantitative flow ratio (QFR) in the hemodynamic evaluation of myocardial bridge and to preliminarily evaluate the correlation and related influencing factors between deformation quantitative flow ratio (D-QFR) and QFR. Methods: This is a cross-sectional study. Patients with CAG-confirmed simple myocardial bridge of the middle anterior descending coronary artery from June 2012 to June 2022 at the Air Force Medical Center were retrospectively included in this study. Systolic stenosis of mural coronary arteries (MCA) and myocardial bridge length were measured using quantitative coronary angiography. The patients were divided into mild stenosis group (<50% systolic stenosis) and moderate-to-severe stenosis group (≥50% systolic stenosis) according to the Nobel grading criteria. At different time periods (systolic and diastolic), the QFR values were measured at 3 locations (1 to 2 cm before the MCA entrance, the middle segment of the MCA, and 1 to 2 cm after the MCA exit), denoted as QFRa, QFRb, and QFRc, respectively, and the D-QFR values, incorporating vessel deformation information, were recorded. The MCA distal QFR≤0.8 in either stage was defined as an abnormal QFR value. QFR values were compared between the two groups at different locations and within each group. Factors associated with abnormal QFR values were analysed using multifactorial logistic regression. Spearman rank correlation analysis was used to examine the correlation between D-QFR values and systolic and diastolic QFR values.Multiple linear regression was used to analyse the factors associated with D-QFR. Results: A total of 83 patients were enrolled, including 58 males, aged (57.1±13.1) years. There were 48 cases in the mild stenosis group and 35 cases in the moderate-to-severe stenosis group, and the differences in systolic and diastolic QFRb and QFRc values between the two groups were statistically significant (all P<0.05). Within-group comparisons showed the values of QFRb and QFRc in the systolic phase were lower than those in the diastolic phase; QFRb and QFRc were both lower than QFRa during the same period (all P<0.05). Multifactorial logistic regression analysis showed that MCA systolic stenosis (OR=1.225, 95%CI 1.093-1.372, P<0.001) was an influential factor for abnormal QFR. D-QFR values were positively correlated with both systolic and diastolic QFR values (correlation coefficients were 0.849 and 0.675, respectively, both P<0.01). Multiple linear regression analysis showed that D-QFR values were negatively correlated with age (β=-0.208, P=0.029), systolic stenosis (β=-0.500, P<0.001), and myocardial bridge length (β=-0.211, P=0.036). Conclusions: The QFR values in middle and distal of myocardial bridge decrease. The systolic stenosis rate of myocardial bridge is an important factor affecting QFR value. D-QFR is positively correlated with both systolic and diastolic QFR values. Age, myocardial bridge systolic stenosis rate and length are factors influencing the D-QFR values.
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Affiliation(s)
- M Wang
- Department of Cardiology, Air Force Medical Center of PLA, Beijing 100142, China
| | - X M Fan
- Graduate School, Hebei North University, Zhangjiakou 075000, China
| | - Q L Wang
- Department of Cardiology, Air Force Hospital of Eastern Theater Command, Nanjing 210001, China
| | - Y K Cao
- Department of Cardiology, Air Force Medical Center of PLA, Beijing 100142, China
| | - C Y Ma
- Department of Cardiology, Air Force Medical Center of PLA, Beijing 100142, China
| | - Q Y He
- Fifth Clinical College of Anhui Medical University, Hefei 230032, China
| | - H T Zhang
- Department of Cardiology, Air Force Medical Center of PLA, Beijing 100142, China
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Sun J, Deng YP, Xu J, Zhu FM, He QY, Tang MM, Liu Y, Yang J, Liu HY, Fu L, Zhao H. Association of blood cadmium concentration with chronic obstructive pulmonary disease progression: a prospective cohort study. Respir Res 2024; 25:91. [PMID: 38368333 PMCID: PMC10874061 DOI: 10.1186/s12931-024-02726-0] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Accepted: 02/12/2024] [Indexed: 02/19/2024] Open
Abstract
BACKGROUND Prior studies in patients with chronic obstructive pulmonary disease (COPD) had indicated a potential correlation between cadmium (Cd) exposure and reduction in lung function. Nevertheless, the influence of Cd exposure on the progression of COPD remained unknown. Exploring the relationship between Cd exposure and the progression of COPD was the aim of this investigation. METHODS Stable COPD patients were enrolled. Blood samples were collected and lung function was evaluated. Regular professional follow-ups were conducted through telephone communications, outpatient services, and patients' hospitalization records. RESULTS Each additional unit of blood Cd was associated with upward trend in acute exacerbation, hospitalization, longer hospital stay, and death within 2 years. Even after adjusting for potential confounding factors, each 1 unit rise in blood Cd still correlated with a rise in the frequencies of acute exacerbation, longer hospital stay, and death. Moreover, COPD patients with less smoking amount, lower lung function and without comorbidities were more vulnerable to Cd-induced disease deterioration. CONCLUSION Patients with COPD who have higher blood Cd concentration are susceptible to worse disease progression.
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Affiliation(s)
- Jing Sun
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, Anhui, China
- Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, Anhui, China
| | - You-Peng Deng
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, Anhui, China
- Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, Anhui, China
| | - Juan Xu
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, Anhui, China
- Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, Anhui, China
| | - Feng-Min Zhu
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, Anhui, China
- Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, Anhui, China
| | - Qi-Yuan He
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, Anhui, China
- Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, Anhui, China
| | - Min-Min Tang
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, Anhui, China
- Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, Anhui, China
| | - Ying Liu
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, Anhui, China
- Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, Anhui, China
| | - Jin Yang
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, Anhui, China
- Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, Anhui, China
| | - Hong-Yan Liu
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, Anhui, China
- Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, Anhui, China
- Center for Big Data and Population Health of IHM, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, Anhui, China
| | - Lin Fu
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, Anhui, China.
- Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, Anhui, China.
- Center for Big Data and Population Health of IHM, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, Anhui, China.
| | - Hui Zhao
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, Anhui, China.
- Institute of Respiratory Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, Anhui, China.
- Center for Big Data and Population Health of IHM, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, Anhui, China.
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Li JF, Zou Q, Li X, Liu Y, He QY, Fu L, Zhao H. Associations of Serum Clara Cell Protein 16 with Severity and Prognosis in Adults with Community-Acquired Pneumonia. Int J Gen Med 2023; 16:4907-4917. [PMID: 37928954 PMCID: PMC10625334 DOI: 10.2147/ijgm.s429665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Accepted: 10/25/2023] [Indexed: 11/07/2023] Open
Abstract
Background Clara cell protein 16 (CC16) has multiple functions, including antioxidant, anti-inflammatory, and immune regulation properties. Nevertheless, the concrete function of CC16 in adult patients with community-acquired pneumonia (CAP) remained blurred. Methods A total of 541 adult patients with CAP were recruited on admission. Peripheral blood specimens, clinical parameters, and demographic characteristics were collected. The concentration of serum CC16 was evaluated through ELISA. The relationships between serum CC16 and clinical parameters were appraised by Spearman or Pearson correlative analyses. The correlations of serum CC16 with severity and prognosis were assessed using linear or logistic regression models. Results The level of CC16 was gradually decreased across with the elevated severity scores system of CAP. After treatment, the level of serum CC16 was upregulated. Correlative analyses found that serum CC16 was negatively related to inflammatory cytokines. Additionally, multivariate linear and logistic regression models revealed that serum CC16 was inversely associated with severity scores system. In addition, reduced serum CC16 on admission elevated the risks of vasoactive agent usage, ICU admission, and death during hospitalization. We observed an almost discriminatory ability for severity and death between serum CC16 and severity scores system, and were all obviously elevated compared to routine inflammatory and infectious markers. Conclusion There are substantially inverse correlations between serum CC16 level on admission with severity scores and poorly prognostic outcomes, indicating that CC16 is involved in the pathophysiological process of CAP. This study is helpful for establishing the potential application of serum CC16 in risk evaluation and targeted treatment.
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Affiliation(s)
- Jia-Fei Li
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, 230601, People’s Republic of China
- Department of Respiratory and Critical Care Medicine, First People’s Hospital of Chuzhou, Chuzhou, Anhui, 239001, People’s Republic of China
- Institute of Respiratory Diseases, Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, 230601, People’s Republic of China
| | - Qian Zou
- Department of Respiratory and Critical Care Medicine, First People’s Hospital of Chuzhou, Chuzhou, Anhui, 239001, People’s Republic of China
| | - Xun Li
- Department of Respiratory and Critical Care Medicine, First People’s Hospital of Chuzhou, Chuzhou, Anhui, 239001, People’s Republic of China
| | - Ying Liu
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, 230601, People’s Republic of China
- Institute of Respiratory Diseases, Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, 230601, People’s Republic of China
| | - Qi-Yuan He
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, 230601, People’s Republic of China
- Institute of Respiratory Diseases, Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, 230601, People’s Republic of China
| | - Lin Fu
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, 230601, People’s Republic of China
- Institute of Respiratory Diseases, Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, 230601, People’s Republic of China
| | - Hui Zhao
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, 230601, People’s Republic of China
- Institute of Respiratory Diseases, Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, 230601, People’s Republic of China
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Yang XY, He QY, Wang L. [Advances in hepatitis E epidemiology]. Zhonghua Gan Zang Bing Za Zhi 2023; 31:455-459. [PMID: 37365019 DOI: 10.3760/cma.j.cn501113-20230319-00122] [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: 06/28/2023]
Abstract
Hepatitis E is a viral hepatitis that the hepatitis E virus (HEV) causes. In the early 1980s, the hepatitis E virus was first discovered and identified, and it is one of the important pathogens that cause acute viral hepatitis globally. HEV infection is usually self-limiting, but in some groups of populations, such as pregnant women, patients with chronic liver disease, and the elderly, the prognosis is poor and may result in acute or subacute liver failure or even death. In addition, HEV infection can occur in chronically immunocompromised populations. At present, some regions and countries are not paying enough attention to hepatitis E prevention, diagnosis, and treatment, which suggests that we should study the epidemiology of HEV infection.
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Affiliation(s)
- X Y Yang
- Department of Microbiology and Center of Infectious Diseases, Peking University Health Science Center, Beijing 100191, China
| | - Q Y He
- Department of Microbiology and Center of Infectious Diseases, Peking University Health Science Center, Beijing 100191, China
| | - L Wang
- Department of Microbiology and Center of Infectious Diseases, Peking University Health Science Center, Beijing 100191, China
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Hua DX, Ma KS, Cheng JY, Liu Y, Sun J, He QY, Deng YP, Yang J, Fu L, Zhao H. Serum TRAIL predicts severity and prognosis in patients with community-acquired pneumonia: a prospective cohort study. Intern Emerg Med 2022; 17:2279-2290. [PMID: 36241932 PMCID: PMC9569003 DOI: 10.1007/s11739-022-03086-7] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Accepted: 08/16/2022] [Indexed: 11/20/2022]
Abstract
Tumor necrosis factor (TNF)-related apoptosis-inducing ligand (TRAIL) can trigger the apoptosis pathways through binding to relative death receptors. However, the relationship of TRAIL with community-acquired pneumonia (CAP) was unclear. This study aims at exploring the relationships between circulatory TRAIL with severity and prognosis in CAP patients through a prospective cohort study. The whole of 239 CAP patients was enrolled. Demographic characteristics and clinical information were analyzed. TRAIL and inflammatory cytokines were measured using enzyme-linked immunosorbent assay (ELISA). Circulatory TRAIL was gradually increased in accord with CAP severity scores. Spearman or Pearson correlative analysis indicated that circulatory TRAIL was strongly associated with physiologic indicators among CAP patients. Mixed logistic and linear regression models revealed that circulatory TRAIL was positively correlated with the severity scores in CAP patients. After adjusting for confounders, higher levels of circulatory TRAIL on admission significantly elevated the risks of ICU admission, mechanical ventilation, longer hospital stays, or even death during hospitalization. The predictive capacities of serum TRAIL for death were higher compared with CAP severity scores, inflammatory and infectious indicators. There are obviously positive dose-response relationships between circulatory TRAIL on admission with the severity and poor prognostic outcomes in CAP patients. Circulatory TRAIL on admission may be used as a potential biomarker in predicting the severity and poor prognosis for CAP patients.
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Affiliation(s)
- Dong-Xu Hua
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Anhui Medical University, Furong Road no 678, Hefei, 230601, Anhui, China
| | - Kai-Shu Ma
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Anhui Medical University, Furong Road no 678, Hefei, 230601, Anhui, China
- Department of Respiratory and Critical Care Medicine, Funan County People's Hospital, Fuyang, 236300, Anhui, China
| | - Jia-Yi Cheng
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Anhui Medical University, Furong Road no 678, Hefei, 230601, Anhui, China
| | - Ying Liu
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Anhui Medical University, Furong Road no 678, Hefei, 230601, Anhui, China
| | - Jing Sun
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Anhui Medical University, Furong Road no 678, Hefei, 230601, Anhui, China
| | - Qi-Yuan He
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Anhui Medical University, Furong Road no 678, Hefei, 230601, Anhui, China
| | - You-Peng Deng
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Anhui Medical University, Furong Road no 678, Hefei, 230601, Anhui, China
| | - Jin Yang
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Anhui Medical University, Furong Road no 678, Hefei, 230601, Anhui, China
| | - Lin Fu
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Anhui Medical University, Furong Road no 678, Hefei, 230601, Anhui, China.
- Department of Toxicology, Anhui Medical University, Hefei, 230032, Anhui, China.
| | - Hui Zhao
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Anhui Medical University, Furong Road no 678, Hefei, 230601, Anhui, China.
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Yao MX, Cheng JY, Liu Y, Sun J, Hua DX, He QY, Liu HY, Fu L, Zhao H. Cross-sectional and longitudinal associations of serum Cysteine-rich 61 with severity and prognosis among community-acquired pneumonia patients in China. Front Med (Lausanne) 2022; 9:939002. [PMID: 36035395 PMCID: PMC9403795 DOI: 10.3389/fmed.2022.939002] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Accepted: 07/22/2022] [Indexed: 11/13/2022] Open
Abstract
BackgroundCysteine-rich 61 (CYR61) is implicated in many pulmonary diseases. However, the relationship between CYR61 and community-acquired pneumonia (CAP) patients was unknown. This research aimed to estimate the correlations of serum CYR61 with severity and prognosis in CAP patients through a prospective cohort study.MethodsAll 541 CAP patients were enrolled in this study. Fasting venous blood was collected. Clinical characteristics and demographic information were obtained. CYR61 and inflammatory cytokines were detected in serum using ELISA.ResultsSerum CYR61 was gradually increased in parallel with severity scores in CAP patients. Correlative analysis indicated that serum CYR61 was strongly associated with many clinical parameters in CAP patients. Moreover, mixed logistic and linear regression models found that there were positive correlations between serum CYR61 and CAP severity scores after adjusted for age, BMI, and respiratory rate. Stratified analyses suggested that age affected the associations between serum CYR61 and severity scores. On admission, higher serum CYR61 levels elevated the risks of mechanical ventilation, vasoactive agent, ICU admission, death, and longer hospital stays during hospitalization. Moreover, serum CYR61 in combination with severity scores upregulated the predictive capacities for severity and death than single serum CYR61 or severity scores in CAP patients.ConclusionThere are significantly positive dose-response associations of serum CYR61 on admission with the severity and adverse prognostic outcomes, demonstrating that CYR61 is involved in the pathophysiology of CAP. Serum CYR61 may be used as a potential biomarker for the diagnosis and prognosis in CAP patients.
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Affiliation(s)
- Meng-Xing Yao
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Jia-Yi Cheng
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Ying Liu
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Jing Sun
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Dong-Xu Hua
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Qi-Yuan He
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Hong-Yan Liu
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Lin Fu
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Anhui Medical University, Hefei, China
- Department of Toxicology, Anhui Medical University, Hefei, China
- *Correspondence: Lin Fu, ;
| | - Hui Zhao
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Anhui Medical University, Hefei, China
- Hui Zhao,
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9
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Li XM, Li YY, Zhao CF, Liu LN, He QY, Jiang JQ, Chen Y, Yang MH, Tang YX, Li YX, Jin F. [The expression of clock gene CLOCK and its clinical significance in nasopharyngeal carcinoma]. Zhonghua Zhong Liu Za Zhi 2021; 43:1255-1263. [PMID: 34915633 DOI: 10.3760/cma.j.cn112152-20210729-00558] [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 relationship between expression levels of CLOCK mRNA and protein and the clinical characteristics of patients with nasopharyngeal carcinoma. Methods: The frozen tissue specimens from 33 patients with nasopharyngeal carcinoma in the Affiliated Tumor Hospital of Guizhou Medical University from 2018 to 2019 were collected. Seventeen cases of tissue specimens from patients with nasopharyngeal chronic inflammation in the Affiliated Hospital of Guizhou Medical University in 2019 were collected. From 2008 to 2014, 68 cases of formalin-fixed paraffin-embedding (FFPE) nasopharyngeal carcinoma tissue and 37 cases of FFPE nasopharyngeal chronic inflammation tissue were collected from the Affiliated Tumor Hospital of Guizhou Medical University. Real-time quantitative reverse transcription polymerase chain reaction (qRT-PCR) and western blot (WB) were used to detect the mRNA and protein expression levels of CLOCK. The nasopharyngeal carcinoma cells including CNE1, CNE2, 5-8F and the normal nasopharyngeal epithelial cell NP69 were cultured. qRT-PCR was used to detect the expression level of CLOCK mRNA in each cell line at the time points of ZT2, ZT6, ZT10, ZT14, ZT18 and ZT22. The cosine method was used to fit the rhythm of CLOCK gene in nasopharyngeal carcinoma. The protein expression of CLOCK protein was detected by using immunohistochemical method in 68 cases of nasopharyngeal carcinoma and 37 cases of nasopharyngeal chronic inflammation tissue. Survival was analyzed by Kaplan-Meier method and Log rank test, and the influencing factors was analyzed by Cox regression model. Results: The expression levels of CLOCK mRNA in CNE1, CNE2 and 5-8F cells (0.63±0.07, 0.91±0.02 and 0.33±0.04, respectively) were lower than that in NP69 cell (1.00±0.00, P<0.05). The expression levels of CLOCK protein in CNE1, CNE2 and 5-8F cells (0.79±0.06, 0.57±0.05 and 0.74±0.10, respectively) were lower than that of NP69 cells (1.00±0.00, P<0.05). The expressions of CLOCK mRNA in nasopharyngeal carcinoma cells including CEN1, CNE2, 5-8F and normal nasopharyngeal epithelial cell NP69 were different at different time points, with temporal fluctuations. The fluctuation periods of CLOCK mRNA in CNE1, CNE2, 5-8F, and NP69 cells were 16, 14, 22 and 24 hours, respectively. The peak and trough times were ZT10: 40 and ZT18: 40, ZT10 and ZT3, ZT14: 30 and ZT3: 30, ZT12: 39 and ZT0: 39, respectively. CLOCK mRNA and protein expression levels in nasopharyngeal carcinoma tissues (0.37±0.20 and 0.20±0.26, respectively) were lower than those in nasopharyngeal chronic inflammation tissues (1.00±0.00 and 0.51±0.41, respectively, P<0.05). The 1, 3, and 5-year survival rates of patients in the CLOCK protein high expression group (CLOCK protein expression level ≥ 0.178) were 96.2%, 92.1%, and 80.1%, respectively, which were higher than those in the low expression group (CLOCK protein expression level <0.178, 92.9% , 78.6% and 57.1%, respectively, P=0.009). The 1, 3, and 5-year progression-free survival (PFS) rates of patients in the CLOCK protein high expression group were 96.2%, 87.8%, and 87.7%, respectively, which were higher than those in the low expression group (92.7%, 82.2%, and 70.8%, respectively, P=0.105). Compared with the low-expression group (100.0%, 96.9%, and 90.0%, respectively), the 1, 3, and 5-year recurrence-free survival rates of patients in the CLOCK protein high expression group (100.0%, 95.7%, and 95.7%, respectively) were not statistically significant (P=0.514). Compared with the low-expression group (92.7%, 82.2%, and 79.3%), the 1, 3, and 5-year survival rates without metastasis in the CLOCK protein high expression group (96.2%, 92.0%, and 92.0%, respectively) were not statistically significant (P=0.136). CLOCK protein expression and T stage were independent prognostic factors of overall survival (P<0.05). Conclusions: The expression of CLCOK is downregulated in the nasopharyngeal carcinoma cell and nasopharyngeal carcinoma tissues. Clock gene CLOCK is rhythmically expressed in the nasopharyngeal carcinoma cells and normal nasopharyngeal epithelial cells. Compared with normal nasopharyngeal epithelial cells, the fluctuation period of CLOCK in nasopharyngeal carcinoma cells is shortened. The overall survival of patients in the CLOCK protein high expression group is better than that of low expression group. The expression of CLOCK protein is an independent influencing factor for overall survival. CLOCK gene may be a potential tumor suppressor gene in the nasopharyngeal carcinoma.
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Affiliation(s)
- X M Li
- Department of Oncology, Affiliated Tumor Hospital of Guizhou Medical University, Guiyang 550004, China
| | - Y Y Li
- Department of Oncology, Affiliated Hospital of Guizhou Medical University, Guiyang 550004, China
| | - C F Zhao
- Department of Oncology, Affiliated Hospital of Guizhou Medical University, Guiyang 550004, China
| | - L N Liu
- Department of Oncology, Affiliated Hospital of Guizhou Medical University, Guiyang 550004, China
| | - Q Y He
- Department of Oncology, Affiliated Hospital of Guizhou Medical University, Guiyang 550004, China
| | - J Q Jiang
- Department of Oncology, Affiliated Tumor Hospital of Guizhou Medical University, Guiyang 550004, China
| | - Y Chen
- Department of Oncology, Affiliated Tumor Hospital of Guizhou Medical University, Guiyang 550004, China
| | - M H Yang
- Guizhou Medical University School of Clinical Medicine, Guiyang 550004, China
| | - Y X Tang
- Guizhou Medical University School of Clinical Medicine, Guiyang 550004, China
| | - Y X Li
- Guizhou Medical University School of Clinical Medicine, Guiyang 550004, China
| | - F Jin
- Department of Oncology, Affiliated Hospital of Guizhou Medical University, Guiyang 550004, China
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10
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He QY. [Long-term oxygen treatment in patients with chronic obstructive pulmonary disease]. Zhonghua Yi Xue Za Zhi 2021; 101:3775-3778. [PMID: 34895416 DOI: 10.3760/cma.j.cn112137-20210322-00709] [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
This paper introduced several problems of long-term oxygen therapy in chronic obstructive pulmonary disease (COPD) patients, including basic concepts, research progress at home and abroad, physiological significance of long-term oxygen therapy, clinical indications, contraindications, long-term oxygen therapy under special conditions, oxygen source, connection mode, inhaled oxygen concentration management, airway humidification, cooperation and safety of non-invasive ventilation.
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Affiliation(s)
- Q Y He
- Department of Respiratory and Critical Care Medicine, People's Hospital, Beijing University, Beijing 100044, China,
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11
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Wang XY, Cui Z, He QY, Deng XN, Guo G, Feng XH, Feng JL. [Assessment of heart's changes of elite Chinese male weightlifter by speckle tracking echocardiography]. Beijing Da Xue Xue Bao Yi Xue Ban 2021; 53:832-837. [PMID: 34650281 PMCID: PMC8517688 DOI: 10.19723/j.issn.1671-167x.2021.05.004] [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: 06/13/2023]
Abstract
OBJECTIVE To evaluate the changes of heart structure and function in elite Chinese weightlifters by spot tracking technique. METHODS Chinese elite male weightlifters (weightlifter group, n=16) and age-matched healthy men (control group, n=16) were included as subjects. Transthoracic echocardiography and speckle-tracking automatic functional imaging were used for two-dimensional myocardial strain measurements. RESULTS The thickness of septum and left ventricular (LV) posterior wall and the myocardial mass index of LV were all higher than those of the control group [(9.3±1.3) mm vs. (8.0±0.4) mm, (9.2±0.8) mm vs. (8.0±0.8) mm, (77.8±12.8) g/m2 vs. (67.8±11.2) g/m2, all P < 0.05]. Although the LV ejection fraction (LVEF) and global long axis strain value (LVGLS) were not significantly different from those in the control group, the LV mean Sm and Em reflecting the systolic and diastolic functions of the LV were lower than those in the control group (P < 0.05). Further myocardial strain analysis showed that the absolute value of the long axial strain of the basal anteroseptal and mid-inferoseptal segments of the weightlifters were significantly lower than those of the control group [|(-15.1±4.2)%|vs.|(-18.7±3.0)%|, |(-18.8±2.6)%|vs.|(-21.3±2.8)%|, all P < 0.05]. There was no significant difference in other segments. The athletes were divided into two groups according to their best performance in the National Youth Games. The athletes were divided into two sub-groups according to their performance in the National Youth Games. The thickness of the septum in the sub-group with better performance (who ranked the 1st to 8th) was larger [(10.2±1.1) mm vs. (8.5±1.0) mm, P < 0.05], and the absolute value of the long-axis strain in the mid-inferoseptal segment was lower [|(-17.1±2.1)%|vs.|(-20.4±2.1)%|, P < 0.05]. CONCLUSION The thickening of septum is more obvious in the excellent weightlifters, accompanied by the decrease of myocardial systolic function. The speckle-tracking technique of echocardiography can identify the changes of the heart structure and function of elite athletes at an early stage, which may provide a basis for sports medicine supervision and the selection of excellent talents.
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Affiliation(s)
- X Y Wang
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital; Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, National Health Commission of the PRC; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education; Beijing Key Laboratory of Cardiovascular Receptors Research; Beijing 100191, China
| | - Z Cui
- Department of Radiology, Peking University Third Hospital, Beijing 100191, China
| | - Q Y He
- Department of Radiology, Peking University Third Hospital, Beijing 100191, China
| | - X N Deng
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital; Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, National Health Commission of the PRC; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education; Beijing Key Laboratory of Cardiovascular Receptors Research; Beijing 100191, China
| | - G Guo
- Department of Radiology, Peking University Third Hospital, Beijing 100191, China
| | - X H Feng
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital; Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, National Health Commission of the PRC; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education; Beijing Key Laboratory of Cardiovascular Receptors Research; Beijing 100191, China
| | - J L Feng
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital; Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, National Health Commission of the PRC; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education; Beijing Key Laboratory of Cardiovascular Receptors Research; Beijing 100191, China
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12
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An P, Wang Y, Zhou SF, Xie MY, Gan L, He QY, Zeng H, Yuan W. New teaching method for prenatal cardiac screening: vascular and tracheal model. Ultrasound Obstet Gynecol 2021; 58:139-141. [PMID: 32672381 DOI: 10.1002/uog.22154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 07/04/2020] [Accepted: 07/06/2020] [Indexed: 06/11/2023]
Affiliation(s)
- P An
- Department of Medical Imaging, Xiangyang No. 1 People's Hospital Affiliated to Hubei University of Medicine, Xiangyang Key Laboratory of Maternal-Fetal Medicine in Fetal Heart Disease, Hubei, China
| | - Y Wang
- Department of Medical Imaging, Xiangyang No. 1 People's Hospital Affiliated to Hubei University of Medicine, Xiangyang Key Laboratory of Maternal-Fetal Medicine in Fetal Heart Disease, Hubei, China
- Department of Internal Medicine and Public Health, Xiangyang No. 1 People's Hospital Affiliated to Hubei University of Medicine, Hubei, China
| | - S F Zhou
- Department of Cardiology, Xiangyang No. 1 People's Hospital Affiliated to Hubei University of Medicine, Hubei, China
| | - M Y Xie
- Department of Internal Medicine and Public Health, Xiangyang No. 1 People's Hospital Affiliated to Hubei University of Medicine, Hubei, China
| | - L Gan
- Department of Medical Imaging, Xiangyang No. 1 People's Hospital Affiliated to Hubei University of Medicine, Xiangyang Key Laboratory of Maternal-Fetal Medicine in Fetal Heart Disease, Hubei, China
- Department of Obstetrics and Gynecology, Xiangyang No. 1 People's Hospital Affiliated to Hubei University of Medicine, Hubei, China
| | - Q Y He
- Anatomy Laboratory, Xiangyang No. 1 People's Hospital Affiliated to Hubei University of Medicine, Hubei, China
| | - H Zeng
- Anatomy Laboratory, Xiangyang No. 1 People's Hospital Affiliated to Hubei University of Medicine, Hubei, China
| | - W Yuan
- Anatomy Laboratory, Xiangyang No. 1 People's Hospital Affiliated to Hubei University of Medicine, Hubei, China
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Yao DW, Ma J, Yang CL, Chen LL, He QY, Coleman DN, Wang TZ, Jiang XL, Luo J, Ma Y, Loor JJ. Phosphatase and tensin homolog (PTEN) suppresses triacylglycerol accumulation and monounsaturated fatty acid synthesis in goat mammary epithelial cells. J Dairy Sci 2021; 104:7283-7294. [PMID: 33741170 DOI: 10.3168/jds.2020-18784] [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: 04/24/2020] [Accepted: 02/04/2021] [Indexed: 12/30/2022]
Abstract
Phosphatase and tensin homolog (PTEN) is a well-known tumor suppressor in nonruminants and regulates various cellular processes including growth through dephosphorylation of phosphoinositide substrates. Although studies with bovine mammary tissue suggested a role for PTEN during lactation, its potential role in lipid metabolism remains unknown. Objectives of the present study were to determine PTEN abundance in goat mammary tissue at 2 stages of lactation (n = 6 Xinong Saanen dairy goats per stage), and to use gene-silencing and adenoviral transfections in vitro with isolated goat mammary epithelial cells (GMEC) to evaluate the role of PTEN abundance of lipid metabolism-related genes. Abundance of PTEN decreased by 51.5% at peak lactation compared with the dry period. The PTEN was overexpressed in isolated GMEC through adenoviral transfection using an adenovirus system with Ad-GFP (recombinant adenovirus of green fluorescent protein) as control, and silenced via targeted small interfering RNA (siRNA) transfection with a scrambled small interfering RNA as a negative control. Cell culture was performed for 48 h before RNA extraction, triacylglycerol (TAG) analysis, and fatty acid analysis. Overexpression of PTEN downregulated abundance of acetyl-coenzyme A carboxylase α (ACACA), fatty acid synthase (FASN), sterol regulatory element binding transcription factor1 (SREBF1), stearoyl-coenzyme A desaturase 1 (SCD1), diacylglycerol acytransferase 1 (DGAT1), 1-acylglycerol-3-phosphate O-acyltransferase 6 (AGPAT6) coupled with an increase in patatin-like-phospholipase domain containing 2 (PNPLA2), hormone-sensitive lipase (LIPE), and carnitine palmitoyltransferase 1 β (CPT1B). Furthermore, overexpressing PTEN in vitro resulted in a significant decrease in TAG concentration and concentration of C16:1. In contrast, interference of PTEN led to an opposite effect on lipid metabolism in GMEC. These changes suggested a shift from lipogenesis and esterification to lipolysis and fatty acid oxidation. Collectively, PTEN seems to play a role in monounsaturated fatty acids synthesis and lipid accumulation in GMEC.
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Affiliation(s)
- D W Yao
- Tianjin Institute of Animal Husbandry and Veterinary Medicine, Tianjin Academy of Agricultural Sciences, Tianjin, P. R. China 300381
| | - J Ma
- Tianjin Institute of Animal Husbandry and Veterinary Medicine, Tianjin Academy of Agricultural Sciences, Tianjin, P. R. China 300381
| | - C L Yang
- Tianjin Institute of Animal Husbandry and Veterinary Medicine, Tianjin Academy of Agricultural Sciences, Tianjin, P. R. China 300381
| | - L L Chen
- Tianjin Institute of Animal Husbandry and Veterinary Medicine, Tianjin Academy of Agricultural Sciences, Tianjin, P. R. China 300381
| | - Q Y He
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P. R. China 712100
| | - D N Coleman
- Mammalian NutriPhysioGenomics, Department of Animal Sciences and Division of Nutritional Sciences, University of Illinois, Urbana 61801
| | - T Z Wang
- Tianjin Institute of Animal Husbandry and Veterinary Medicine, Tianjin Academy of Agricultural Sciences, Tianjin, P. R. China 300381
| | - X L Jiang
- Tianjin Institute of Animal Husbandry and Veterinary Medicine, Tianjin Academy of Agricultural Sciences, Tianjin, P. R. China 300381
| | - J Luo
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P. R. China 712100
| | - Y Ma
- Tianjin Institute of Animal Husbandry and Veterinary Medicine, Tianjin Academy of Agricultural Sciences, Tianjin, P. R. China 300381.
| | - J J Loor
- Mammalian NutriPhysioGenomics, Department of Animal Sciences and Division of Nutritional Sciences, University of Illinois, Urbana 61801.
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14
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Hu YJ, Xu XB, Wang Y, Wang W, Cui XN, He QY, Li MH, Xu J, Li FQ. [Analysis on serotype and antimicrobial resistance of invasive non-typhoidal Salmonella]. Zhonghua Liu Xing Bing Xue Za Zhi 2021; 42:549-554. [PMID: 34814428 DOI: 10.3760/cma.j.cn112338-20200316-00361] [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: 06/13/2023]
Abstract
Objective: To investigate the serotypes and antimicrobial resistance of seven invasive non-typhoidal Salmonella (iNTS) isolates. Methods: For 7 iNTS strains collected, serotype identification, antimicrobial susceptibility testing and whole genome sequencing were performed. We identified, annotated and analyzed the serotypes, MLST types, and antimicrobial resistance genes. Results: Among the 7 tested iNTS isolates, we found one Salmonella Typhimurium strain and two Salmonella Ⅰ 4, [5], 12: i:- strains whose MLST types were ST34, two Salmonella Enteritidis strains, one Salmonella Corvallis strain and one strain of unknown serotype with the antigenic formulae of Ⅰ 4, [5], 12: d:- (ST279 type). Six of seven strains were monophasic and the deletion or pseudogenization of Salmonella Flagellum gene might contribute to the enhancement of Salmonella invasiveness. None was found to be resistant to tigarcycline, aztreonam, amikacin, cephalosporins and carbapenem and one Salmonella Typhimurium strain was found to be co-resistant to eight classes of antimicrobials at the same time. Resistance genes were generally in accord with relative resistant phenotypes. Conclusion: The iNTS strains could show high level multi-drug resistance, indicating that close attention should be paid to the resistance of iNTS though the overall resistance might be relatively not high.
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Affiliation(s)
- Y J Hu
- Key Laboratory of Food Safety Risk Assessment of Health, National Health Commission of China, China National Center for Food Safety Risk Assessment, Beijing 100021, China
| | - X B Xu
- Institute of Pathogen Microbiology, Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - Y Wang
- Department of Clinical Laboratory, Beijing Jishuitan Hospital, Beijing 100035, China
| | - W Wang
- Key Laboratory of Food Safety Risk Assessment of Health, National Health Commission of China, China National Center for Food Safety Risk Assessment, Beijing 100021, China
| | - X N Cui
- Food Science and Engineering College, Beijing University of Agriculture, Beijing 102206, China
| | - Q Y He
- Centre for Food Safety, University College Dublin, Dublin D04 N2E5, Ireland
| | - M H Li
- Key Laboratory of Food Safety Risk Assessment of Health, National Health Commission of China, China National Center for Food Safety Risk Assessment, Beijing 100021, China
| | - J Xu
- Key Laboratory of Food Safety Risk Assessment of Health, National Health Commission of China, China National Center for Food Safety Risk Assessment, Beijing 100021, China
| | - F Q Li
- Key Laboratory of Food Safety Risk Assessment of Health, National Health Commission of China, China National Center for Food Safety Risk Assessment, Beijing 100021, China
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15
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Yuan HY, Yan P, Zheng S, He QY, Xia K, Yung MH. Steady Bell State Generation via Magnon-Photon Coupling. Phys Rev Lett 2020; 124:053602. [PMID: 32083914 DOI: 10.1103/physrevlett.124.053602] [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: 05/27/2019] [Accepted: 01/09/2020] [Indexed: 06/10/2023]
Abstract
We show that parity-time (PT) symmetry can be spontaneously broken in the recently reported energy level attraction of magnons and cavity photons. In the PT-broken phase, the magnon and photon form a high-fidelity Bell state with maximum entanglement. This entanglement is steady and robust against the perturbation of the environment, which is in contrast to the general wisdom that expects instability of the hybridized state when the symmetry is broken. This anomaly is further understood by the compete of non-Hermitian evolution and particle number conservation of the hybrid system. As a comparison, neither PT-symmetry breaking nor steady magnon-photon entanglement is observed inside the normal level repulsion case. Our results may open an exciting window to utilize magnon-photon entanglement as a resource for quantum information science.
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Affiliation(s)
- H Y Yuan
- Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China
| | - Peng Yan
- School of Electronic Science and Engineering and State Key Laboratory of Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Shasha Zheng
- State Key Laboratory for Mesoscopic Physics, School of Physics and Frontiers Science Center for Nano-Optoelectronics, Peking University, Beijing 100871, China
- Beijing Academy of Quantum Information Sciences, Haidian District, Beijing 100193, China
- Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Q Y He
- State Key Laboratory for Mesoscopic Physics, School of Physics and Frontiers Science Center for Nano-Optoelectronics, Peking University, Beijing 100871, China
- Beijing Academy of Quantum Information Sciences, Haidian District, Beijing 100193, China
- Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Ke Xia
- Beijing Computational Science Research Center, Beijing 100193, China
| | - Man-Hong Yung
- Institute for Quantum Science and Engineering and Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China
- Shenzhen Key Laboratory of Quantum Science and Engineering, Shenzhen 518055, China
- Central Research Institute, Huawei Technologies, Shenzhen 518129, China
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16
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He QY. [Thinking about some problems in prevention and control of COPD]. Zhonghua Yi Xue Za Zhi 2019; 99:3121-3125. [PMID: 31694101 DOI: 10.3760/cma.j.issn.0376-2491.2019.40.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Q Y He
- Department of Respiratory and Critical Care Medicine, People's Pospital Beijing University, Beijing 100044, China
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17
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Reid MD, He QY. Quantifying the Mesoscopic Nature of Einstein-Podolsky-Rosen Nonlocality. Phys Rev Lett 2019; 123:120402. [PMID: 31633988 DOI: 10.1103/physrevlett.123.120402] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 05/21/2019] [Indexed: 06/10/2023]
Abstract
Evidence for Bell's nonlocality is so far mainly restricted to microscopic systems, where the elements of reality that are negated predetermine results of measurements to within one spin unit. Any observed nonlocal effect (or lack of classical predetermination) is then limited to no more than the difference of a single photon or electron being detected or not (at a given detector). In this paper, we analyze experiments that report the Einstein-Podolsky-Rosen (EPR) steering form of nonlocality for mesoscopic photonic or Bose-Einstein condensate systems. Using an EPR steering parameter, we show how the EPR nonlocalities involved can be quantified for four-mode states, to give evidence of EPR-nonlocal effects corresponding to a two-mode number difference of 10^{5} photons, or of several tens of atoms (at a given site). Applying to experiments, we also show how the variance criterion of Duan, Giedke, Cirac and Zoller for EPR entanglement can be used to determine a lower bound on the number of particles in a pure two-mode EPR-entangled or steerable state.
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Affiliation(s)
- M D Reid
- Centre for Quantum and Optical Science, Swinburne University of Technology, Melbourne, Victoria 3122, Australia
- Institute of Theoretical Atomic, Molecular and Optical Physics (ITAMP), Harvard University, Cambridge, Massachusetts 02138, USA
| | - Q Y He
- State Key Laboratory of Mesoscopic Physics, School of Physics, Peking University, Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
- Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
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18
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He QY. [Research progress of the application of AI in the diagnosis and treatment of respiratory disease]. Zhonghua Jie He He Hu Xi Za Zhi 2019; 42:613-617. [PMID: 31378025 DOI: 10.3760/cma.j.issn.1001-0939.2019.08.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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19
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He QZ, Wu XJ, He QY, Xiang JJ, Zhang CH, Lu L, Wang T, Li H. A method for improving the accuracy of non-invasive prenatal screening by cell-free foetal DNA size selection. Br J Biomed Sci 2019; 75:133-138. [PMID: 29968522 DOI: 10.1080/09674845.2018.1468152] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Background Non-invasive prenatal screening (NIPS) using cell-free foetal DNA (cfDNA) has been widely used for identifying common foetal aneuploidies (e.g. trisomy 21 (T21), trisomy (T18) and trisomy 13 (T13)) in clinical practice. The sensitivity and specificity of NIPS exceeds 99%, but the positive prediction value (PPV) is approximately 70% (combined T21, T18 and T13). Thus, some 30% of pregnant women who have positive NIPS results are eventually identified as normal by amniocentesis. These women therefore must undertake needless invasive tests and risk miscarrying healthy babies because of false positive NIPS results. Methods In order to achieve higher accuracy, we amended the standard NIPS (s-NIPS) protocol with an additional cfDNA size selecting step in agarose-electrophoresis. The advantage of the new method (named e-NIPS) was validated by comparing the results of e-NIPS and s-NIPS using 114 retrospective cases selected from 15,930 cases. Results Our results showed that the foetal cfDNA fraction can be enriched significantly by a size selection step. With this modification, all 98 negative cases and 9 of 11 false positive cases of s-NIPS were correctly identified by e-NIPS, resulting in an increased PPV from 71% to 77%. Additionally, a simulation test showed that e-NIPS is more reliable than s-NIPS, especially when the foetal cfDNA concentration and sequencing coverage are low. Conclusion cfDNA size selection is an important step in improving the accuracy of non-invasive prenatal screening for chromosomal abnormalities.
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Affiliation(s)
- Q Z He
- a Center for Reproduction and Genetics , The Affiliated Suzhou Hospital of Nanjing Medical University , Suzhou , China
| | - X J Wu
- a Center for Reproduction and Genetics , The Affiliated Suzhou Hospital of Nanjing Medical University , Suzhou , China
| | - Q Y He
- b College of Medicine , Hunan Normal University , Changsha , China
| | - J J Xiang
- a Center for Reproduction and Genetics , The Affiliated Suzhou Hospital of Nanjing Medical University , Suzhou , China
| | - C H Zhang
- a Center for Reproduction and Genetics , The Affiliated Suzhou Hospital of Nanjing Medical University , Suzhou , China
| | - L Lu
- a Center for Reproduction and Genetics , The Affiliated Suzhou Hospital of Nanjing Medical University , Suzhou , China
| | - T Wang
- a Center for Reproduction and Genetics , The Affiliated Suzhou Hospital of Nanjing Medical University , Suzhou , China
| | - H Li
- a Center for Reproduction and Genetics , The Affiliated Suzhou Hospital of Nanjing Medical University , Suzhou , China
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He QY, Liu GL. [Attention should be paid to the diagnosis and treatment of obstructive sleep apnea hypopnea syndrome during pregnancy]. Zhonghua Jie He He Hu Xi Za Zhi 2019; 42:490-491. [PMID: 31365962 DOI: 10.3760/cma.j.issn.1001-0939.2019.07.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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21
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Chen SH, Yang J, Han HB, Cui DH, Sun JJ, Ma CC, He QY, Lin GZ, Han YF, Wu C, Ma KM, Zhang YB. [Application of diffusion tensor imaging combined with virtual reality three-dimensional reconstruction in the operation of gliomas involved eloquent regions]. Beijing Da Xue Xue Bao Yi Xue Ban 2019; 51:530-535. [PMID: 31209427 DOI: 10.19723/j.issn.1671-167x.2019.03.023] [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] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To investigate the values of diffusion tensor imaging (DTI) and virtual reality (VR) techniques in design surgery program of gliomas near eloquent regions. METHODS In this study, 35 cases were retrospectively analyzed with gliomas involved language areas or rolandic regions operated in Department of Neurosurgery, Peking University Third Hospital from January 2015 to January 2019. Surgery programs were performed by Dextroscope virtual reality system. The pre-operative data, such as the magnetic resonance imaging (MRI), magnetic resonance arteriography (MRA) and DTI was transferred into the VR computer for restitution,Tumors, neural fiber tracts and blood vessels were reconstructed to simulate operation and design individual surgical plan. Neurological function was evaluated 1 week, 1 month and 3 months after operation. RESULTS Virtual reality three-dimensional images of the 35 cases were successfully achieved, including neural fiber tracts,blood vessels and the lesions. The displacement and destruction of fiber tracts, the anatomic relationship between tumor and important fiber bundle, artery and vein could be shown clearly. Surgical simulation and surgery program of VR of the 35 patients were successfully performed. The 3D images obtained from virtual reality near to the real surgery. Ten of the 35 cases were defined as rolandic regions tumors, 14 of the 35 cases were defined as language areas tumors and 11 of the 35 cases involved both language areas and rolandic regions. Complete resection of enhancing tumor (CRET) was achieved in 30 cases (85.7%), subtotal resection in 5 cases (14.3%), neurological function improved in 34 cases (97.1%) after operation,and 1 case had no improvement compared with that before(2.9%). Thirteen cases without neurological deficit pre-operation, showed transient neurological deficit ,which were recovered about 10 days post-operation, 12 of 22 cases with pre-operative neurologic deficit, improved one week postoperation, 9 of 22 cases with pre-operative neurologic deficit improved one month after operation, the rest 1 case was recurrent with glioblastoma with aggravated hemiplegia symptom after operation, who died of cerebral hernia 2 months later. CONCLUSION Dextroscope virtual reality system can clearly expose and quantify the 3D anatomic relationship of tumors, neural fiber tracts and blood vessels surrounding gliomas near eloquent regions, which is helpful to design the best individualized surgery program, to improve surgical effect.
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Affiliation(s)
- S H Chen
- Department of Neurosurgery, Peking University Third Hospital, Beijing 100191, China
| | - J Yang
- Department of Neurosurgery, Peking University Third Hospital, Beijing 100191, China.,Beijing Key Lab of Magnetic Resonance Imaging Device and Technique, Beijing 100191, China
| | - H B Han
- Beijing Key Lab of Magnetic Resonance Imaging Device and Technique, Beijing 100191, China.,Department of Radiology, Peking University Third Hospital, Beijing 100191, China
| | - D H Cui
- Beijing Key Lab of Magnetic Resonance Imaging Device and Technique, Beijing 100191, China
| | - J J Sun
- Department of Neurosurgery, Peking University Third Hospital, Beijing 100191, China
| | - C C Ma
- Department of Neurosurgery, Peking University Third Hospital, Beijing 100191, China
| | - Q Y He
- Beijing Key Lab of Magnetic Resonance Imaging Device and Technique, Beijing 100191, China.,Department of Radiology, Peking University Third Hospital, Beijing 100191, China
| | - G Z Lin
- Department of Neurosurgery, Peking University Third Hospital, Beijing 100191, China
| | - Y F Han
- Department of Neurosurgery, Peking University Third Hospital, Beijing 100191, China
| | - C Wu
- Department of Neurosurgery, Peking University Third Hospital, Beijing 100191, China
| | - K M Ma
- Department of Neurosurgery, Peking University Third Hospital, Beijing 100191, China
| | - Y B Zhang
- Department of Neurosurgery, Peking University Third Hospital, Beijing 100191, China
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22
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Wang J, He QY, Li ME, Zhang L, Du XD, Zhu P, Shi YY, Zhu CR. [Study on unprotected anal intercourse behavior in HIV-positive men who have sex with men in the context of knowing their HIV infection status in Chengdu]. Zhonghua Liu Xing Bing Xue Za Zhi 2019; 39:954-958. [PMID: 30060311 DOI: 10.3760/cma.j.issn.0254-6450.2018.07.017] [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 identify related factors associated with unprotected anal intercourse (UAI) among HIV-positive men who have sex with men (MSM) in the context of knowing their HIV infection status. Methods: HIV positive MSM who known that they had been infected with HIV for more than 6 months and accepted follow up services were recruited by convenience sampling method in Chengdu 2015. Semi-structured questionnaire was used to collect their information, such as demographic characteristics, antiviral therapy and sexual behavior characteristics etc. Logistic regression model was used for univariate and multivariate analyses. Results: A total of 330 HIV- positive MSM were recruited, 201 eligible MSM were interviewed. The prevalence of UAI in recent six months was 18.41% (37/201). The results of multivariate logistic regression analysis revealed that the number of anal intercourse with male ≥3 in last month (OR=6.22, 95%CI: 1.88-20.56), low education level (OR=7.29, 95%CI: 1.36-39.16), married, divorced or widowed status (OR=4.65, 95%CI: 1.13-19.17), homosexual cohabitation (OR=3.32, 95%CI: 1.01-10.95) were the risk factors related with UAI among the HIV-positive MSM. Conclusion: Frequent homosexual anal intercourse, low education level, married, divorced or widowed status and homosexual cohabitation might be the risk factors related with UAI in HIV-positive MSM in Chengdu.
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Affiliation(s)
- J Wang
- Department of Epidemiology and Health Statistics, West China School of Public Health, Sichuan University, Chengdu 610041, China
| | - Q Y He
- Chengdu Municipal Center for Disease Control and Prevention, Chengdu 610041, China
| | - M E Li
- Department of Epidemiology and Health Statistics, West China School of Public Health, Sichuan University, Chengdu 610041, China
| | - L Zhang
- Department of Epidemiology and Health Statistics, West China School of Public Health, Sichuan University, Chengdu 610041, China
| | - X D Du
- Department of Epidemiology and Health Statistics, West China School of Public Health, Sichuan University, Chengdu 610041, China
| | - P Zhu
- Department of Epidemiology and Health Statistics, West China School of Public Health, Sichuan University, Chengdu 610041, China
| | - Y Y Shi
- Chengdu Municipal Center for Disease Control and Prevention, Chengdu 610041, China
| | - C R Zhu
- Department of Epidemiology and Health Statistics, West China School of Public Health, Sichuan University, Chengdu 610041, China
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23
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He QY, Jin F, Li YY, Wu WL, Long JH, Luo XL, Gong XY, Chen XX, Bi T, Li ZL, Qu B, Jiang H, Zhang PX. Prognostic significance of downregulated BMAL1 and upregulated Ki-67 proteins in nasopharyngeal carcinoma. Chronobiol Int 2018; 35:348-357. [PMID: 29172799 DOI: 10.1080/07420528.2017.1406494] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Accepted: 11/14/2017] [Indexed: 12/14/2022]
Abstract
This study assessed the prognostic value of BMAL1 and Ki-67 expression in patients with nasopharyngeal carcinoma. Level of BMAL1 mRNA was assessed in tissue specimens from 36 nasopharyngeal carcinomas and 20 nasopharyngeal chronic inflammations using quantitative reverse transcriptase-polymerase chain reaction. Expression of BMAL1 and Ki-67 proteins was analyzed immunohistochemically in 90 paired nasopharyngeal carcinoma and distant normal tissues. The Kaplan-Meier curves and the Log-rank test were used to calculate prognostic significance stratified by BMAL1 and Ki67 protein expression and the COX regression model was to analyze the multivariate prognosis. BMAL1 mRNA was significantly reduced in nasopharyngeal carcinoma (4.67 ± 0.27 versus 6.64 ± 0.51 in chronic inflammation tissues, p = 0.002). Level of BMAL1 mRNA was associated with tumor distant metastasis (3.37 ± 0.66 versus 5.04 ± 0.27 compared with non-metastasis, p = 0.011). Level of BMAL1 protein was also reduced in tumor tissues and BMAL1 expression was associated with better 1-, 3- and 5-year overall survival (OS) of cancer patients (92.6%, 69.2% and 62.3% versus 59.1%, 40.9% and 0% in patients with low BMAL1 expressed tumors; p = 0.000). BMAL1 expression and age were independent prognostic factors for OS (p = 0.032). Furthermore, Ki-67 expression was high in tumor versus normal tissues and associated with poor OS of cancer patients (p = 0.035). The Pearson correlation analysis showed that there was an inverse association between BMAL1 and Ki-67 protein expression (p = 0.021). This study demonstrated that lost BMAL1 and Ki-67 overexpression were associated with poor OS of nasopharyngeal carcinoma patients.
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Affiliation(s)
- Q Y He
- a Department of Head and Neck Oncology , Guizhou Cancer Hospital , Guiyang , PR China
| | - F Jin
- a Department of Head and Neck Oncology , Guizhou Cancer Hospital , Guiyang , PR China
- b Department of Oncology , Affiliated Hospital of Guizhou Medical University , Guiyang , PR China
| | - Y Y Li
- a Department of Head and Neck Oncology , Guizhou Cancer Hospital , Guiyang , PR China
- b Department of Oncology , Affiliated Hospital of Guizhou Medical University , Guiyang , PR China
| | - W L Wu
- a Department of Head and Neck Oncology , Guizhou Cancer Hospital , Guiyang , PR China
- b Department of Oncology , Affiliated Hospital of Guizhou Medical University , Guiyang , PR China
| | - J H Long
- a Department of Head and Neck Oncology , Guizhou Cancer Hospital , Guiyang , PR China
- c Guizhou Medical University , Guiyang , PR China
| | - X L Luo
- a Department of Head and Neck Oncology , Guizhou Cancer Hospital , Guiyang , PR China
- b Department of Oncology , Affiliated Hospital of Guizhou Medical University , Guiyang , PR China
| | - X Y Gong
- a Department of Head and Neck Oncology , Guizhou Cancer Hospital , Guiyang , PR China
| | - X X Chen
- a Department of Head and Neck Oncology , Guizhou Cancer Hospital , Guiyang , PR China
| | - T Bi
- a Department of Head and Neck Oncology , Guizhou Cancer Hospital , Guiyang , PR China
- c Guizhou Medical University , Guiyang , PR China
| | - Z L Li
- a Department of Head and Neck Oncology , Guizhou Cancer Hospital , Guiyang , PR China
- b Department of Oncology , Affiliated Hospital of Guizhou Medical University , Guiyang , PR China
| | - B Qu
- a Department of Head and Neck Oncology , Guizhou Cancer Hospital , Guiyang , PR China
| | - H Jiang
- a Department of Head and Neck Oncology , Guizhou Cancer Hospital , Guiyang , PR China
| | - P X Zhang
- c Guizhou Medical University , Guiyang , PR China
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Yue X, Han GR, He QY, Wang Y, Li QR, Ding Y, Cai M. [Epidemiological and clinical features of pregnant women with positive hepatitis C virus antibody]. Zhonghua Gan Zang Bing Za Zhi 2017; 25:769-771. [PMID: 29108207 DOI: 10.3760/cma.j.issn.1007-3418.2017.10.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Affiliation(s)
- X Yue
- Department of Gynecology, Second Affiliated Hospital of the Southeast University, Nanjing 210003, China
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25
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Li B, Xu WW, Han L, Chan KT, Tsao SW, Lee NPY, Law S, Xu LY, Li EM, Chan KW, Qin YR, Guan XY, He QY, Cheung ALM. MicroRNA-377 suppresses initiation and progression of esophageal cancer by inhibiting CD133 and VEGF. Oncogene 2017; 36:3986-4000. [PMID: 28288140 PMCID: PMC5511242 DOI: 10.1038/onc.2017.29] [Citation(s) in RCA: 101] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Revised: 12/29/2016] [Accepted: 01/11/2017] [Indexed: 02/05/2023]
Abstract
Esophageal cancer is one of the most lethal cancers worldwide with poor survival and limited therapeutic options. The discovery of microRNAs created a new milestone in cancer research. miR-377 is located in chromosome region 14q32, which is frequently deleted in esophageal squamous cell carcinoma (ESCC), but the biological functions, clinical significance and therapeutic implication of miR-377 in ESCC are largely unknown. In this study, we found that miR-377 expression was significantly downregulated in tumor tissue and serum of patients with ESCC. Both tumor tissue and serum miR-377 expression levels were positively correlated with patient survival. Higher serum miR-377 expression was inversely associated with pathologic tumor stage, distant metastasis, residual tumor status and chemoradiotherapy resistance. The roles of miR-377 in suppressing tumor initiation and progression, and the underlying molecular mechanisms were investigated. Results of in vitro and in vivo experiments showed that miR-377 overexpression inhibited the initiation, growth and angiogenesis of ESCC tumors as well as metastatic colonization of ESCC cells, whereas silencing of miR-377 had opposite effects. Mechanistically, miR-377 regulated CD133 and VEGF by directly binding to their 3' untranslated region. Moreover, systemic delivery of formulated miR-377 mimic not only suppressed tumor growth in nude mice but also blocked tumor angiogenesis and metastasis of ESCC cells to the lungs without overt toxicity to mice. Collectively, our study established that miR-377 plays a functional and significant role in suppressing tumor initiation and progression, and may represent a promising non-invasive diagnostic and prognostic biomarker and therapeutic strategy for patients with ESCC.
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MESH Headings
- AC133 Antigen/genetics
- Adult
- Aged
- Aged, 80 and over
- Animals
- Carcinoma, Squamous Cell/diagnosis
- Carcinoma, Squamous Cell/genetics
- Carcinoma, Squamous Cell/mortality
- Carcinoma, Squamous Cell/pathology
- Case-Control Studies
- Cell Line, Tumor
- Cell Transformation, Neoplastic/genetics
- Disease Progression
- Down-Regulation/genetics
- Esophageal Neoplasms/diagnosis
- Esophageal Neoplasms/genetics
- Esophageal Neoplasms/mortality
- Esophageal Neoplasms/pathology
- Esophageal Squamous Cell Carcinoma
- Female
- Gene Expression Regulation, Neoplastic
- HEK293 Cells
- Humans
- Male
- Mice
- Mice, Inbred BALB C
- Mice, Inbred NOD
- Mice, Nude
- Mice, SCID
- MicroRNAs/physiology
- Middle Aged
- Vascular Endothelial Growth Factor A/genetics
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Affiliation(s)
- B Li
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, China
- The University of Hong Kong-Shenzhen Institute of Research and Innovation (HKU-SIRI), Shenzhen, China
- Centre for Cancer Research, The University of Hong Kong, Pokfulam, China
| | - W W Xu
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, China
- The University of Hong Kong-Shenzhen Institute of Research and Innovation (HKU-SIRI), Shenzhen, China
| | - L Han
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, China
- The University of Hong Kong-Shenzhen Institute of Research and Innovation (HKU-SIRI), Shenzhen, China
| | - K T Chan
- Department of Surgery, The University of Hong Kong, Pokfulam, China
| | - S W Tsao
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, China
- Centre for Cancer Research, The University of Hong Kong, Pokfulam, China
| | - N P Y Lee
- Centre for Cancer Research, The University of Hong Kong, Pokfulam, China
- Department of Surgery, The University of Hong Kong, Pokfulam, China
| | - S Law
- Centre for Cancer Research, The University of Hong Kong, Pokfulam, China
- Department of Surgery, The University of Hong Kong, Pokfulam, China
| | - L Y Xu
- The Key Laboratory of Molecular Biology for High Cancer Incidence Coastal Chaoshan Area, Shantou University Medical College, Shantou, China
| | - E M Li
- The Key Laboratory of Molecular Biology for High Cancer Incidence Coastal Chaoshan Area, Shantou University Medical College, Shantou, China
| | - K W Chan
- The University of Hong Kong-Shenzhen Institute of Research and Innovation (HKU-SIRI), Shenzhen, China
- Centre for Cancer Research, The University of Hong Kong, Pokfulam, China
- Department of Pathology, The University of Hong Kong, Pokfulam, China
| | - Y R Qin
- Department of Clinical Oncology, First Affiliated Hospital, Zhengzhou University, Zhengzhou, China
| | - X Y Guan
- Centre for Cancer Research, The University of Hong Kong, Pokfulam, China
- Department of Clinical oncology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, China
| | - Q Y He
- College of Life Science and Technology, Jinan University, 601 West Huangpu Blvd., Guangzhou, China
| | - A L M Cheung
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, China
- The University of Hong Kong-Shenzhen Institute of Research and Innovation (HKU-SIRI), Shenzhen, China
- Centre for Cancer Research, The University of Hong Kong, Pokfulam, China
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, 21 Sassoon Road, Pokfulam, Hong Kong, SAR, China. E-mail:
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He QY. [Rational oxygen therapy in patients with chronic obstructive pulmonary disease]. Zhonghua Yi Xue Za Zhi 2017; 97:1531-1533. [PMID: 28592057 DOI: 10.3760/cma.j.issn.0376-2491.2017.20.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
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Chen BY, Xie LX, He QY. [Focus on promoting the standardization of the clinical oxygen therapy in China]. Zhonghua Yi Xue Za Zhi 2017; 97:1523-1525. [PMID: 28592054 DOI: 10.3760/cma.j.issn.0376-2491.2017.20.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
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Yao DW, Luo J, He QY, Li J, Wang H, Shi HB, Xu HF, Wang M, Loor JJ. Characterization of the liver X receptor-dependent regulatory mechanism of goat stearoyl-coenzyme A desaturase 1 gene by linoleic acid. J Dairy Sci 2017; 99:3945-3957. [PMID: 26947306 DOI: 10.3168/jds.2015-10601] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [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: 11/05/2015] [Accepted: 01/13/2016] [Indexed: 01/05/2023]
Abstract
Stearoyl-coenzyme A desaturase 1 (SCD1) is a key enzyme in the biosynthesis of palmitoleic and oleic acid. Although the transcriptional regulatory mechanism of SCD1 via polyunsaturated fatty acids (PUFA) has been extensively explored in nonruminants, the existence of such mechanism in ruminant mammary gland remains unknown. In this study, we used goat genomic DNA to clone and sequence a 1,713-bp fragment of the SCD1 5' flanking region. Deletion assays revealed a core region of the promoter located between -415 and -109 bp upstream of the transcription start site, and contained the highly conserved PUFA response region. An intact PUFA response region was required for the basal transcriptional activity of SCD1. Linoleic acid reduced endogenous expression of SCD1 and sterol regulatory element binding factor-1 (SREBF1) in goat mammary epithelial cells. Further analysis indicated that both the sterol response element (SRE) and the nuclear factor Y (NF-Y) binding site in the SCD1 promoter were responsible for the inhibition effect by linoleic acid, whereas the effect was abrogated once NF-Y was deleted. In addition, SRE and NF-Y were partly responsible for the transcriptional activation induced via the liver X receptor agonist T 4506585 (Sigma-Aldrich, St. Louis, MO). When goat mammary epithelial cells were cultured with linoleic acid, addition of T 4506585 markedly increased SCD1 transcription in controls, but had no effect on cells with a deleted SRE promoter. These results demonstrated that linoleic acid can regulate SCD1 expression at the transcriptional level through SRE and NF-Y in a liver X receptor-dependent fashion in the goat mammary gland.
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Affiliation(s)
- D W Yao
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P. R. China 712100
| | - J Luo
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P. R. China 712100.
| | - Q Y He
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P. R. China 712100
| | - J Li
- College of Animal Science and Technology, Henan University of Animal Husbandry and Economy, Zhengzhou, Henan, P. R. China 450046
| | - H Wang
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P. R. China 712100
| | - H B Shi
- College of Animal Sciences, Zhejiang Sci-Tech University, Hangzhou, P. R. China 310058
| | - H F Xu
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P. R. China 712100
| | - M Wang
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P. R. China 712100
| | - J J Loor
- Mammalian NutriPhysioGenomics, Department of Animal Sciences and Division of Nutritional Sciences, University of Illinois, Urbana 61801.
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Yao DW, Luo J, He QY, Xu HF, Li J, Shi HB, Wang H, Chen Z, Loor JJ. Liver X receptor α promotes the synthesis of monounsaturated fatty acids in goat mammary epithelial cells via the control of stearoyl-coenzyme A desaturase 1 in an SREBP-1-dependent manner. J Dairy Sci 2016; 99:6391-6402. [PMID: 27209141 DOI: 10.3168/jds.2016-10990] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Accepted: 03/31/2016] [Indexed: 12/30/2022]
Abstract
Stearoyl-coenzyme A desaturase 1 (SCD1) is a pivotal enzyme in the biosynthesis of monounsaturated fatty acids (MUFA). It is tightly regulated by transcription factors that control lipogenesis. In nonruminants, liver X receptor α (LXRα) is a nuclear receptor and transcription factor that acts as a key sensor of cholesterol and lipid homeostasis. However, the mechanism whereby LXRα regulates the expression and transcriptional activity of SCD1 in ruminant mammary cells remains unknown. In this study with goat mammary epithelial cells (GMEC), the LXRα agonist T 4506585 (T09) markedly enhanced the mRNA expression of SCD1 and sterol regulatory element binding factor 1 (SREBF1). The concentrations of C16:1 and C18:1 and their desaturation indices also were increased by LXRα activation. However, knockdown of LXRα did not alter the mRNA expression of SCD1. Although SCD1 was repressed by SREBF1 knockdown, T09 significantly increased SCD1 expression. Further analysis revealed that the SCD1 promoter activity was activated by LXRα overexpression. The goat SCD1 promoter contains 2 LXR response elements (LXRE), 1 sterol response element (SRE), and 1 nuclear factor Y (NF-Y) binding site. Site-directed mutagenesis of LXRE1, LXRE2, or SRE alone did not eliminate the upregulation of SCD1 when LXRα was overexpressed. In contrast, when NF-Y alone or in combination with SRE was mutated simultaneously, the basal transcriptional activity of the SCD1 promoter was markedly decreased and did not respond to LXRα overexpression. Furthermore, when SREBF1 was knocked down, overexpression of LXRα did not affect the promoter activity of SCD1. Together, these data suggest that LXRα regulates the expression of SCD1 through increasing SREBP-1 abundance to promote interaction with SRE and NF-Y binding sites. The present study provides evidence that LXRα is involved in the synthesis of MUFA in the goat mammary gland through an indirect mechanism.
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Affiliation(s)
- D W Yao
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| | - J Luo
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China.
| | - Q Y He
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| | - H F Xu
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| | - J Li
- College of Animal Science and Technology, Henan University of Animal Husbandry and Economy, Zhengzhou, Henan, P. R. China 450046
| | - H B Shi
- College of Animal Sciences, Zhejiang Sci-Tech University, Hangzhou, P. R. China 310058
| | - H Wang
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| | - Z Chen
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| | - J J Loor
- Mammalian NutriPhysioGenomics, Department of Animal Sciences and Division of Nutritional Sciences, University of Illinois, Urbana 61801.
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Yao DW, Luo J, He QY, Wu M, Shi HB, Wang H, Wang M, Xu HF, Loor JJ. Thyroid hormone responsive (THRSP) promotes the synthesis of medium-chain fatty acids in goat mammary epithelial cells. J Dairy Sci 2016; 99:3124-3133. [PMID: 26851858 DOI: 10.3168/jds.2015-10632] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Accepted: 12/14/2015] [Indexed: 12/22/2022]
Abstract
In nonruminants, thyroid hormone responsive (THRSP) is a crucial protein for cellular de novo lipogenesis. However, the role of THRSP in regulating the synthesis of milk fatty acid composition in goat mammary gland remains unknown. In the present study, we compared gene expression of THRSP among different goat tissues. Results revealed that THRSP had the highest expression in subcutaneous fat, and expression was higher during lactation compared with the dry period. Overexpression of THRSP upregulated the expression of fatty acid synthase (FASN), stearoyl-coenzyme A desaturase 1 (SCD1), diacylglycerol acyltransferase 2 (DGAT2), and glycerol-3-phosphate acyltransferase (GPAM) in goat mammary epithelial cells. In contrast, overexpression of THRSP led to downregulation of thrombospondin receptor (CD36) and had no effect on the expression of acetyl-coenzyme A carboxylase α (ACACA) and sterol regulatory element binding transcription factor1 (SREBF1). In addition, overexpressing THRSP in vitro resulted in a significant increase in triacylglycerol (TAG) concentration and the concentrations of C12:0 and C14:0. Taken together, these results highlight an important role of THRSP in regulating lipogenesis in goat mammary epithelial cells.
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Affiliation(s)
- D W Yao
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P. R. China 712100
| | - J Luo
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P. R. China 712100.
| | - Q Y He
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P. R. China 712100
| | - M Wu
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P. R. China 712100
| | - H B Shi
- College of Animal Sciences, Zhejiang Sci-Tech University, Hangzhou, P. R. China 310058
| | - H Wang
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P. R. China 712100
| | - M Wang
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P. R. China 712100
| | - H F Xu
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P. R. China 712100
| | - J J Loor
- Mammalian NutriPhysioGenomics, Department of Animal Sciences and Division of Nutritional Sciences, University of Illinois, Urbana 61801.
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Xiang Y, Sun FX, Wang M, Gong QH, He QY. Detection of genuine tripartite entanglement and steering in hybrid optomechanics. Opt Express 2015; 23:30104-30117. [PMID: 26698491 DOI: 10.1364/oe.23.030104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Multipartite quantum entanglement is a key resource for ensuring security in quantum network. We show that by using a unified parameter in terms of reduced noise variances one can determine different types of tripartite entanglement of a given state generated in a hybrid optomechanical system, where an atomic ensemble is located inside a single-mode cavity with a movable mirror, with different thresholds for each type. In particular, the special quantum states which allow both entanglement and steering genuinely shared among atom-light-mirror modes can be observed, even though there is no direct interaction between the mirror and the atomic ensemble. We further show the robustness against mechanical thermal noise and damping, the relaxation time of atomic ensemble, as well as the effect of gain factors involved in the criteria. Our analysis provides an experimentally achievable method to determine the type of tripartite quantum correlation in a way.
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Han JT, Qiao HT, Han X, Li X, He QY, Ye S, Luan JY, Wang CM, Dong GX. [Analysis of vertebrobasilar dolichoectasia based on computational fluid dynamics]. Beijing Da Xue Xue Bao Yi Xue Ban 2015; 47:302-304. [PMID: 25882949] [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: 06/04/2023]
Abstract
OBJECTIVE To analyze the hemodynamic states of vertebrobasilar dolichoectasia based on computational fluid dynamics technique. METHODS The original DICOM format image data from a patient with vertebrobasilar dolichoectasia (VBD), were imported by the Mimics software directly,and the 3D Objects were constructed.The simulation of model was made with Ansys software, the hemodynamic parameters such as streamlines, wall shear stress (WSS) and wall pressure were described. RESULTS There was stable laminar flow in proximal basilar artery and was no blood flow mixed by bilateral vertebral artery.However, Spiral flows were appeared in distal tortuous basilar artery. The low WSS regions in the vertebrabasilar junction section and inferior segment of basilar artery were coincide with the high wall pressure regions.It could be speculated the initial growth regions might be located in the vertebrabasilar junction section and inferior segment of basilar artery.Local regions with low WSS and high wall pressure might be associated with the occurrence and development of VBD. CONCLUSION CFD numerical simulation maybe can provide a theoretical basis for the role of hemodynamic factors in occurrence and development of VBD.
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Affiliation(s)
- J T Han
- Interventional Radiology and Vascular Surgery Department, Peking University Third Hospital, Beijing 100191, China
| | - H T Qiao
- Biological and Medical Engineering, Beijing University of Aeronautics and Astronautics,Beijing 100191, China
| | - X Han
- China Nuclear Power Engineering Co.Ltd,Beijing 100840, China
| | - X Li
- Interventional Radiology and Vascular Surgery Department, Peking University Third Hospital, Beijing 100191, China
| | - Q Y He
- Department of Radiology, Peking University Third Hospital, Beijing 100191, China
| | - S Ye
- Department of Neurology,Peking University Third Hospital, Beijing 100191, China
| | - J Y Luan
- Interventional Radiology and Vascular Surgery Department, Peking University Third Hospital, Beijing 100191, China
| | - C M Wang
- Interventional Radiology and Vascular Surgery Department, Peking University Third Hospital, Beijing 100191, China
| | - G X Dong
- Interventional Radiology and Vascular Surgery Department, Peking University Third Hospital, Beijing 100191, China
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He QY, Gong QH, Reid MD. Classifying directional Gaussian entanglement, Einstein-Podolsky-Rosen steering, and discord. Phys Rev Lett 2015; 114:060402. [PMID: 25723192 DOI: 10.1103/physrevlett.114.060402] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Indexed: 06/04/2023]
Abstract
Using Venn diagrams, we classify the different types of two-mode Gaussian continuous variable quantum correlation including directional entanglement and Einstein-Podolsky-Rosen (EPR) steering. We establish unified signatures for one- and two-way quantum steering, entanglement, and discord beyond entanglement in terms of an EPR-type variance. By focusing on Gaussian states, we link an optimized condition for entanglement based on an EPR variance to the Simon-Peres condition. This allows us to quantify the asymmetry of the Gaussian entanglement, and to relate the asymmetry to a directional quantum teleportation protocol where Alice and Bob possess asymmetrically noisy channels. Our analysis enables a determination of the type and direction of quantum correlation in a way that is easily measured in experiment. We also find that for symmetric states, when discord exceeds a certain threshold, the states are necessarily steerable.
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Affiliation(s)
- Q Y He
- State Key Laboratory of Mesoscopic Physics, School of Physics, Peking University, Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
| | - Q H Gong
- State Key Laboratory of Mesoscopic Physics, School of Physics, Peking University, Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
| | - M D Reid
- Centre for Quantum Atom Optics, Swinburne University of Technology, Melbourne, Australia
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Abstract
We develop the concept of genuine N-partite Einstein-Podolsky-Rosen (EPR) steering. This nonlocality is the natural multipartite extension of the original EPR paradox. Useful properties emerge that are not guaranteed for genuine multipartite entangled states. In particular, there is a close link with the task of one-sided, device-independent quantum secret sharing. We derive inequalities to demonstrate multipartite EPR steering for Greenberger-Horne-Zeilinger and Gaussian continuous variable states in loophole-free scenarios.
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Affiliation(s)
- Q Y He
- Centre for Quantum Atom Optics, Swinburne University of Technology, Melbourne, 3122 Australia and State Key Laboratory of Mesoscopic Physics, School of Physics, Peking University, Beijing 100871 China
| | - M D Reid
- Centre for Quantum Atom Optics, Swinburne University of Technology, Melbourne, 3122 Australia
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He QY, Reid MD, Vaughan TG, Gross C, Oberthaler M, Drummond PD. Einstein-Podolsky-Rosen entanglement strategies in two-well Bose-Einstein condensates. Phys Rev Lett 2011; 106:120405. [PMID: 21517288 DOI: 10.1103/physrevlett.106.120405] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2010] [Indexed: 05/30/2023]
Abstract
Criteria suitable for measuring entanglement between two different potential wells in a Bose-Einstein condensation are evaluated. We show how to generate the required entanglement, utilizing either an adiabatic two-mode or a dynamic four-mode interaction strategy, with techniques that take advantage of s-wave scattering interactions to provide the nonlinear coupling. The dynamic entanglement method results in an entanglement signature with spatially separated detectors, as in the Einstein-Podolsky-Rosen paradox.
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Affiliation(s)
- Q Y He
- ARC Centre of Excellence for Quantum-Atom Optics, Centre for Atom Optics and Ultrafast Spectroscopy, Swinburne University of Technology, Melbourne 3122, Australia
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Guo YY, Wei T, He QY, Liu JM. Dynamic hysteresis scaling of ferroelectric Pb(0.9)Ba(0.1)(Zr(0.52)Ti(0.48))O(3) thin films. J Phys Condens Matter 2009; 21:485901. [PMID: 21832531 DOI: 10.1088/0953-8984/21/48/485901] [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] [Indexed: 05/31/2023]
Abstract
We measure systematically the intrinsic scaling behavior of dynamic hysteresis for Pb(0.9)Ba(0.1)(Zr(0.52)Ti(0.48))O(3) (PBZT) ferroelectric thin films with Pt electrodes on Si substrates, utilizing the Sawyer-Tower technique. For the as-prepared thin films of similar thickness and microstructure, over the low frequency range, the scaling follows the power law [Formula: see text] under low E(0) and the power law [Formula: see text] under high E(0), where ⟨A⟩ is the hysteresis area, and f and E(0) are the frequency and amplitude of the external electric field. In the high- f range, the power law for low E(0) takes the form of [Formula: see text], while that for high E(0) takes the form of [Formula: see text]. It is identified that the dynamic behaviors at low frequency mainly come from the intrinsic domain reversal instead of others like the leakage current, while the depolarization field may influence the frequency exponents at high frequency. We study the temperature scaling of the hysteresis, indicating that the scaling under low E(0) is roughly consistent with the (Φ(2))(2) model. Finally, we argue that experimentally obtained power law scaling for Pb(Zr(0.52)Ti(0.48))O(3) thin films prepared under the given conditions may not be reliable due to the polarization fatigue effect.
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Affiliation(s)
- Y Y Guo
- Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, People's Republic of China
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He QY, Cavalcanti EG, Reid MD, Drummond PD. Testing for multipartite quantum nonlocality using functional bell inequalities. Phys Rev Lett 2009; 103:180402. [PMID: 19905791 DOI: 10.1103/physrevlett.103.180402] [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: 05/29/2009] [Revised: 09/11/2009] [Indexed: 05/28/2023]
Abstract
We show that arbitrary functions of continuous variables, e.g., position and momentum, can be used to generate tests that distinguish quantum theory from local hidden variable theories. By optimizing these functions, we obtain more robust violations of local causality than obtained previously. We analytically calculate the optimal function and include the effect of nonideal detectors and noise, revealing that optimized functional inequalities are resistant to standard forms of decoherence. These inequalities could allow a loophole-free Bell test with efficient homodyne detection.
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Affiliation(s)
- Q Y He
- Centre for Quantum-Atom Optics, Swinburne University of Technology, Melbourne, Australia
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He QY, Reid MD, Drummond PD. Digital quantum memories with symmetric pulses. Opt Express 2009; 17:9662-9668. [PMID: 19506615 DOI: 10.1364/oe.17.009662] [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] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We propose a digital approach to quantum memories using a single-mode oscillator-cavity model, in which the coupling is shaped in time to provide the optimum interface to a time-symmetric input pulse. Our generic model is applicable to any linear storage medium ranging from a superconducting device to an atomic medium.
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Affiliation(s)
- Q Y He
- Centre for Atom Optics and Ultra-fast Spectroscopy, Swinburne University, Melbourne, VIC, Australia
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Lai WY, Zhu XR, He QY, Huang W. Synthesis and Properties of Triphenylamine- and 9-Phenylcarbazole-cored Star-shaped Terfluorenes: Understanding the Effect of Molecular Dimensionality. CHEM LETT 2009. [DOI: 10.1246/cl.2009.392] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Lai WY, Chen QQ, He QY, Fan QL, Huang W. Microwave-enhanced multiple Suzuki couplings toward highly luminescent starburst monodisperse macromolecules. Chem Commun (Camb) 2006:1959-61. [PMID: 16767249 DOI: 10.1039/b517841j] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A facile and powerful microwave-enhanced multiple Suzuki coupling methodology has been developed and a novel series of highly luminescent six-arm monodisperse macromolecules have thus been prepared with high yield and purity.
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Affiliation(s)
- Wen-Yong Lai
- Institute of Advanced Materials (IAM), Fudan University, Shanghai 200433, P. R. China
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Abstract
HEL cells, a human erythroleukemia cell line, mainly express the fetal (gamma) globin gene and trace amount of the embryonic (epsilon) globin gene, but not adult (beta) globin gene. Here we show that hydroxyurea (HU) can induce HEL cells to express adult (beta) globin gene and lead these cells to terminal differentiation. Results showed in Gel mobility shift assays that GATA factors could specifically bind to the regulatory elements of human beta-globin gene, including the proximal regulatory element (the beta-promoter) and the distal regulatory elements (the DNase I hypersensitive sites in the LCR, HS2-HS4 core sequences). However, the DNA binding patterns of GATA factors were quite different between HU-induced and uninduced HEL cells. Western-blot analysis of nuclear extracts from both the uninduced and HU-induced HEL cells revealed that the level of GATA-2 transcription factor decreased, whereas the level of GATA-1 transcription factor increased following the time of hydroxyurea induction. Furthermore, using RT-PCR analysis the expression of human beta-globin gene in HU-induced HEL cells could be blocked again when HEL cells were incubated in the presence of antisense oligonucleotides for hGATA-1, suggesting that the upregulation of hGATA-1 transcription factor might be critical for the expression of human beta-globin gene in HU-induced HEL cells.
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Affiliation(s)
- S B Zhang
- Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences
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Baker HM, Mason AB, He QY, MacGillivray RT, Baker EN. Ligand variation in the transferrin family: the crystal structure of the H249Q mutant of the human transferrin N-lobe as a model for iron binding in insect transferrins. Biochemistry 2001; 40:11670-5. [PMID: 11570867 DOI: 10.1021/bi010907p] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Proteins of the transferrin (Tf) family play a central role in iron homeostasis in vertebrates. In vertebrate Tfs, the four iron-binding ligands, 1 Asp, 2 Tyr, and 1 His, are invariant in both lobes of these bilobal proteins. In contrast, there are striking variations in the Tfs that have been characterized from insect species; in three of them, sequence changes in the C-lobe binding site render it nonfunctional, and in all of them the His ligand in the N-lobe site is changed to Gln. Surprisingly, mutagenesis of the histidine ligand, His249, to glutamine in the N-lobe half-molecule of human Tf (hTf/2N) shows that iron binding is destabilized and suggests that Gln249 does not bind to iron. We have determined the crystal structure of the H249Q mutant of hTf/2N and refined it at 1.85 A resolution (R = 0.221, R(free) = 0.246). The structure reveals that Gln249 does coordinate to iron, albeit with a lengthened Fe-Oepsilon1 bond of 2.34 A. In every other respect, the protein structure is unchanged from wild-type. Examination of insect Tf sequences shows that the K206.K296 dilysine pair, which aids iron release from the N-lobes of vertebrate Tfs, is not present in the insect proteins. We conclude that substitution of Gln for His does destabilize iron binding, but in the insect Tfs this is compensated by the loss of the dilysine interaction. The combination of a His ligand with the dilysine pair in vertebrate Tfs may have been a later evolutionary development that gives more sophisticated pH-mediated control of iron release from the N-lobe of transferrins.
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Affiliation(s)
- H M Baker
- School of Biological Sciences and Department of Chemistry, University of Auckland, Auckland, New Zealand
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Mason AB, He QY, Adams TE, Gumerov DR, Kaltashov IA, Nguyen V, MacGillivray RT. Expression, purification, and characterization of recombinant nonglycosylated human serum transferrin containing a C-terminal hexahistidine tag. Protein Expr Purif 2001; 23:142-50. [PMID: 11570856 DOI: 10.1006/prep.2001.1480] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Attachment of a hexa-His tag is a common strategy in recombinant protein production. The use of such a tag greatly simplifies the purification of the protein from the complex mixture of other proteins in the media or cell extract. We describe the production of two recombinant nonglycosylated human serum transferrins (hTF-NG), containing a factor Xa cleavage site and a hexa-His tag at their carboxyl-terminal ends. One of the constructs comprises the entire coding region for hTF (residues 1-679), while the other lacks the final three carboxyl-terminal amino acids. After insertion of the His-tagged hTFs into the pNUT vector, transfection into baby hamster kidney (BHK) cells, and selection with methotrexate, the secreted recombinant proteins were isolated from the tissue culture medium. Average maximum expression levels of the His-tagged hTFs were about 40 mg/L compared to an average maximum of 50 mg/L for hTF-NG. The first step of purification involved an anion exchange column. The second step utilized a Poros metal chelate column preloaded with copper from which the His-tagged sample was eluted with a linear imidazole gradient. The His-tagged hTFs were characterized and compared to both recombinant hTF-NG and glycosylated hTF from human serum. The identity of each of the His-tagged hTFs constructs was verified by electrospray mass spectroscopy. In summary, the His-tagged hTF constructs simplify the purification of these metal-binding proteins with minimal effects on many of their physical properties. The His-tagged hTFs share many features common to hTF, including reversible iron binding, reactivity with a monoclonal antibody, and presence as a monomer in solution.
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Affiliation(s)
- A B Mason
- Department of Biochemistry, University of Vermont, Burlington, Vermont 05405, USA.
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Paz MM, Das A, Palom Y, He QY, Tomasz M. Selective activation of mitomycin A by thiols to form DNA cross-links and monoadducts: biochemical basis for the modulation of mitomycin cytotoxicity by the quinone redox potential. J Med Chem 2001; 44:2834-42. [PMID: 11495594 DOI: 10.1021/jm010072g] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Mitomycin A (MA) but not mitomycin C (MC) cross-linked linearized (32)P-pBR322 DNA in the presence of dithiothreitol (DTT) or glutathione (GSH), as shown by a sensitive DNA cross-link assay. Incubation of calf-thymus DNA with MA and DTT or mercaptoethanol (MER) resulted in the formation of MA-DNA adducts, which were isolated from nuclease digests of the drug-DNA complexes by HPLC. The adducts were characterized by their UV absorption spectra, electrospray ionization mass spectrometry (ESIMS), and facile conversion from 7-methoxy- to 7-amino-substituted mitosene type adducts upon 10% NH(4)OH treatment, which were identical with known adducts of MC. Both DNA interstrand and intrastrand cross-link adducts, linking two deoxyguanosine residues at N(2), as well as several deoxyguanosine-N(2) monoadducts of MA, were identified. No DNA adducts were formed with MC under the same conditions. A specificity of DNA cross-link formation for the CpG sequence was observed using 12-mer synthetic oligodeoxyribonucleotides as substrates and as DNA sequence models, in analogy to the known CpG sequence specificity of MC-induced DNA cross-links. MA is known to be more cytotoxic by 2-3 orders of magnitude than MC, and this property correlates with redox potentials of MA (-0.19 V) and MA analogues that are higher than those of MC (-0.40 V) and its analogues. It is suggested that the biochemical basis for the higher cytotoxic potency of MA is MA's propensity to be reductively activated by cellular thiols while MC is resistant to thiol activation. This distinction is probably derived from the large difference between the quinone redox potentials of the two drugs.
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Affiliation(s)
- M M Paz
- Department of Chemistry, Hunter College, City University of New York, 695 Park Avenue, New York, New York 10021, USA
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Kang JL, Xia W, He QY. [Clinical study on treatment of oviduct obstruction by integrative traditional Chinese and Western medicine]. Zhongguo Zhong Xi Yi Jie He Za Zhi 2001; 21:416-8. [PMID: 12577433] [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: 02/28/2023]
Abstract
OBJECTIVE To find an effective and practical treatment of oviduct obstruction (OvO). METHODS One hundred and twenty OvO patients were randomly divided into three groups, the TCM-WM group, treated with integrative traditional Chinese and western medicine, the TCM group treated with Chinese herbal medicine alone and the WM group treated with western medicine alone. The therapeutic effect as well as the effect of treatment on serum C-reactive protein (CRP) and interleukin-1 beta (IL-1 beta) were observed. RESULTS After treatment, the fallopian tube patency rate was 86.7% and the pregnant rate 85.0% in the TCM-WM group, while in the TCM group was 66.7% and 63.3% respectively, and in the WM group 53.3% and 50.0% respectively. Comparison among the three groups showed that the effect in the TCM-WM group was significantly superior to that in the other two groups (P < 0.01). The levels of CRP and IL-1 beta were all lowered after 3 courses of treatment, and the effect was more evident in the TCM-WM group (P < 0.01). CONCLUSION TCM-WM treatment is a good and practical method in treating oviduct obstruction.
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Affiliation(s)
- J L Kang
- Department of Gynecology and Obstetrics, First People's Hospital of Guangzhou, Guangzhou 510180
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He QY, Liang YY, Wang DS, Li DD. [Characterization of cell death induced by anticancer antibiotic lidamycin in human hepatoma BEL-7402 cells]. Yao Xue Xue Bao 2001; 36:174-8. [PMID: 12580082] [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: 02/28/2023]
Abstract
AIM To study the features of cell death induced by the anticancer antibiotic lidamycin (LDM) in human hepatoma BEL-7402 cells. METHODS Chromatin condensation was observed by co-staining with fluorescent dyes, hoechst 33342 and propidium iodide. "G1 sub-peak" was detected by flow cytometry and DNA ladder was observed using agarose gel electrophoresis. The caspase-3, 6 activities were measured with kits specific for them. RESULTS Typical apoptotic chromatin condensations appeared when the BEL-7402 cells were treated with the conventional antitumor agent mitomycin C30 mumol.L-1 for 12 h. However, an abnormal type of chromatin condensation occurred when the cells were treated with LDM 1 mumol.L-1 for 6 h, which was characterized with keeping the completeness of nuclear membrane and not forming apoptotic bodies. The DNA ladder patterns were observed using agarose gel electrophoresis. The "G1 sub-peak" occurred only in the cells treated with LDM for 24 h, though chromatin condensation was earlier detected in treatment with LDM for 6 h. The caspase-3, 6 activities were increased about 5 and 4 folds, after the cells were treated with LDM 1 mumol.L-1 for 6 h, as did mitomycin C. The time of initiating chromatin condensation was earlier than that of the high peak activities of caspase-6. CONCLUSION The characterization of cell death induced by lidamycin in the human hepatoma BEL-7402 cells differs from typical apoptosis. The results make it helpful to explain the molecular mechanism of the highly potent cytotoxicities of lidamycin toward tumor cells.
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Affiliation(s)
- Q Y He
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100050, China
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He QY, Mason AB, Lyons BA, Tam BM, Nguyen V, MacGillivray RT, Woodworth RC. Spectral and metal-binding properties of three single-point tryptophan mutants of the human transferrin N-lobe. Biochem J 2001; 354:423-9. [PMID: 11171122 PMCID: PMC1221671 DOI: 10.1042/0264-6021:3540423] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Human serum transferrin N-lobe (hTF/2N) contains three conserved tryptophan residues, Trp(8), Trp(128) and Trp(264), located in three different environments. The present report addresses the different contributions of the three tryptophan residues to the UV-visible, fluorescence and NMR spectra of hTF/2N and the effect of the mutations at each tryptophan residue on the iron-binding properties of the protein. Trp(8) resides in a hydrophobic box containing a cluster of three phenylalanine side chains and is H bonded through the indole N to an adjacent water cluster lying between two beta-sheets containing Trp(8) and Lys(296) respectively. The fluorescence of Trp(8) may be quenched by the benzene rings. The apparent increase in the rate of iron release from the Trp(8)-->Tyr mutant could be due to the interference of the mutation with the H-bond linkage resulting in an effect on the second shell network. The partial quenching in the fluorescence of Trp(128) results from the nearby His(119) residue. Difference-fluorescence spectra reveal that any protein containing Trp(128) shows a blue shift upon binding metal ion, and the NMR signal of Trp(128) broadens out and disappears upon the binding of paramagnetic metals to the protein. These data imply that Trp(128) is a major fluorescent and NMR reporter group for metal binding, and possibly for cleft closure in hTF/2N. Trp(264) is located on the surface of the protein and does not connect to any functional residues. This explains the facts that Trp(264) is the major contributor to both the absorbance and fluorescence spectra, has a strong NMR signal and the mutation at Trp(264) has little effect on the iron-binding and release behaviours of the protein.
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Affiliation(s)
- Q Y He
- Department of Biochemistry, College of Medicine, University of Vermont, Burlington, VT 05405, U.S.A.
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Nurizzo D, Baker HM, He QY, MacGillivray RT, Mason AB, Woodworth RC, Baker EN. Crystal structures and iron release properties of mutants (K206A and K296A) that abolish the dilysine interaction in the N-lobe of human transferrin. Biochemistry 2001; 40:1616-23. [PMID: 11327820 DOI: 10.1021/bi002050m] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Human transferrin (Tf) is responsible for the binding and transport of iron in the bloodstream of vertebrates. Delivery of this bound iron to cells occurs by a process of receptor-mediated endocytosis during which Tf releases its iron at the reduced endosomal pH of approximately 5.6. Iron release from Tf involves a large conformational change in which the two domains that enclose the binding site in each lobe move apart. We have examined the role of two lysines, Lys206 and Lys296, that form a hydrogen-bonded pair close to the N-lobe binding site of human Tf and have been proposed to form a pH-sensitive trigger for iron release. We report high-resolution crystal structures for the K206A and K296A mutants of the N-lobe half-molecule of Tf, hTf/2N, and quantitative iron release data on these mutants and the double mutant K206A/K296A. The refined crystal structures (for K206A, R = 19.6% and R(free) = 23.7%; for K296A, R= 21.2% and R(free) = 29.5%) reveal a highly conserved hydrogen bonding network in the dilysine pair region that appears to be maintained even when individual hydrogen bonding groups change. The iron release data show that the mutants retain iron to a pH 1 unit lower than the pH limit of wild type hTf/2N, and release iron much more slowly as a result of the loss of the dilysine interaction. Added chloride ions are shown to accelerate iron release close to the pH at which iron is naturally lost and the closed structure becomes destabilized, and to retard it at higher pH.
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Affiliation(s)
- D Nurizzo
- School of Biological Sciences, University of Auckland, Auckland, New Zealand
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