1
|
Le Y, Wang R, Xing H, Chen H, Song X, He Y. Pericoronary adipose tissue attenuation predicts outcome of percutaneous intervention for chronic total occlusion. Clin Radiol 2024; 79:e232-e238. [PMID: 38087681 DOI: 10.1016/j.crad.2023.10.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 08/25/2023] [Accepted: 10/10/2023] [Indexed: 01/02/2024]
Abstract
AIM To investigate the association between pericoronary adipose tissue (PCAT) attenuation (PCATA) and outcomes of chronic total occlusion (CTO) after percutaneous coronary intervention (PCI), and to establish a clinical model that can be easily generalised to predict the outcomes of PCI-CTO. MATERIALS AND METHODS Between September 2015 and September 2019, patients from two centres were enrolled retrospectively. The primary endpoint was a procedural success (defined as achieving residual stenosis of <30% and a grade 3 thrombolysis in myocardial infarction [TIMI] flow). The new predictive model was generated by factors that were determined by multivariate analysis. The PCATA of CTO (PCATA-CTO) score was developed by assigning 1 point for each independent predictor, and then summing all points accrued. In addition, the predictive efficacy and interobserver and intraobserver agreement of PCATA-CTO and other scoring systems based on coronary computed tomography angiography (CCTA) were compared. RESULTS A total of 201 patients (mean age 58.9 ± 10.8 years, 85% male) were enrolled. The PCI success was achieved in 76% of the lesions. PCAT was higher in the PCI success group (-72.44 ± 10.45HU versus -76.76 ± 10.54 HU, p<0.05). Multivariable analysis yielded severe calcification, lesion length ≥15 mm, and perivascular fat attenuation index (FAI) ≤-69.5HU as independent negative predictors for procedural success. The area under the receiver operating characteristic curves for the PCATA-CTO score was 0.72. Comparing the PCATA-CTO score with other predictive scores, the PCATA-CTO score showed the highest interobserver (kappa = 0.74) and intraobserver agreement (kappa = 0.90, all p<0.01). CONCLUSION FAI ≤-69.5HU is an independent negative predictor of procedural success. The PCATA-CTO score improved the reliability of the prediction model. Its potential for clinical implementation requires evaluation.
Collapse
Affiliation(s)
- Y Le
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - R Wang
- Department of Radiology, Affiliated Hospital, Chengde Medical University, Hebei 067020, China
| | - H Xing
- Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - H Chen
- Department of Cardiology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - X Song
- Department of Radiology, Affiliated Hospital, Chengde Medical University, Hebei 067020, China.
| | - Y He
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China.
| |
Collapse
|
2
|
Huang Q, Le Y, Li S, Bian Y. Signaling pathways and potential therapeutic targets in acute respiratory distress syndrome (ARDS). Respir Res 2024; 25:30. [PMID: 38218783 PMCID: PMC10788036 DOI: 10.1186/s12931-024-02678-5] [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: 09/30/2023] [Accepted: 01/03/2024] [Indexed: 01/15/2024] Open
Abstract
Acute respiratory distress syndrome (ARDS) is a common condition associated with critically ill patients, characterized by bilateral chest radiographical opacities with refractory hypoxemia due to noncardiogenic pulmonary edema. Despite significant advances, the mortality of ARDS remains unacceptably high, and there are still no effective targeted pharmacotherapeutic agents. With the outbreak of coronavirus disease 19 worldwide, the mortality of ARDS has increased correspondingly. Comprehending the pathophysiology and the underlying molecular mechanisms of ARDS may thus be essential to developing effective therapeutic strategies and reducing mortality. To facilitate further understanding of its pathogenesis and exploring novel therapeutics, this review provides comprehensive information of ARDS from pathophysiology to molecular mechanisms and presents targeted therapeutics. We first describe the pathogenesis and pathophysiology of ARDS that involve dysregulated inflammation, alveolar-capillary barrier dysfunction, impaired alveolar fluid clearance and oxidative stress. Next, we summarize the molecular mechanisms and signaling pathways related to the above four aspects of ARDS pathophysiology, along with the latest research progress. Finally, we discuss the emerging therapeutic strategies that show exciting promise in ARDS, including several pharmacologic therapies, microRNA-based therapies and mesenchymal stromal cell therapies, highlighting the pathophysiological basis and the influences on signal transduction pathways for their use.
Collapse
Affiliation(s)
- Qianrui Huang
- Department of Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1095, Jie Fang Avenue, Wuhan, 430030, China
- Department of Emergency Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1095, Jie Fang Avenue, Wuhan, 430030, China
| | - Yue Le
- Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, 87 Dingjia Bridge, Hunan Road, Gu Lou District, Nanjing, 210009, China
| | - Shusheng Li
- Department of Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1095, Jie Fang Avenue, Wuhan, 430030, China.
- Department of Emergency Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1095, Jie Fang Avenue, Wuhan, 430030, China.
| | - Yi Bian
- Department of Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1095, Jie Fang Avenue, Wuhan, 430030, China.
- Department of Emergency Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1095, Jie Fang Avenue, Wuhan, 430030, China.
| |
Collapse
|
3
|
Dong BQ, Liao ZK, Le Y, Jiang S, Luo LF, Miao F, Le Poole IC, Lei TC. Acceleration of melanocyte senescence by the proinflammatory cytokines IFNγ and TNFα impairs the repigmentation response of vitiligo patients to narrowband ultraviolet B (NBUVB) phototherapy. Mech Ageing Dev 2023; 211:111779. [PMID: 36731753 DOI: 10.1016/j.mad.2023.111779] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/14/2022] [Accepted: 01/28/2023] [Indexed: 01/31/2023]
Abstract
Vitiligo is a chronic autoimmune disease characterized by the T helper 1 (Th1) cytokine-driven immune destruction of melanocytes (MCs). Although narrowband ultraviolet B (NBUVB) phototherapy has been proven to be an effective therapeutic option, the repigmentation response to that phototherapy varies greatly in different vitiligo patients. Here, we demonstrate that there is an increase of NBUVB-induced cellular senescence in vitiligo MCs exposed to Th1 cytokine interferon γ (IFNγ) and/or tumor necrosis factor α (TNFα) in lesional vitiligo skin from poor responders who had undergone NBUVB phototherapy. Supplementation with exogenous recombinant human stem cell factor (rhSCF) in the culture medium as well as the lentiviral vector-mediated overexpression of cKIT could prevent the MCs from the IFNγ/TNFα-accelerated cellular senescence. Mechanistic studies indicated that the reduced ratio of membrane-bound KIT (mKIT) to the soluble form of KIT (sKIT) is directly related to the cellular senescence of vitiligo MCs following exposure to IFNγ and TNFα. Furthermore, the matrix metalloprotease 9 (MMP9) inhibitor GM6001 attenuates the production of sKIT via the suppression of cKIT ectodomain shedding. Altogether, our study indicates that the presence of Th1 cytokines IFNγ and/or TNFα in the epidermal milieu might impair the repigmentation response of vitiligo patients to NBUVB phototherapy.
Collapse
Affiliation(s)
- Bing-Qi Dong
- Department of Dermatology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Zhi-Kai Liao
- Department of Dermatology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Yue Le
- Department of Dermatology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Shan Jiang
- Department of Dermatology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Long-Fei Luo
- Department of Dermatology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Fang Miao
- Department of Dermatology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - I Caroline Le Poole
- Department of Dermatology, Microbiology and Immunology, Northwestern University at Chicago, IL60611, USA
| | - Tie-Chi Lei
- Department of Dermatology, Renmin Hospital of Wuhan University, Wuhan 430060, China.
| |
Collapse
|
4
|
Xiao L, Ran X, Zhong Y, Le Y, Li S. A combined ratio change of inflammatory biomarkers at 72 h could predict the severity and prognosis of sepsis from pulmonary infections. Immunobiology 2022; 227:152290. [DOI: 10.1016/j.imbio.2022.152290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 09/24/2022] [Accepted: 10/06/2022] [Indexed: 11/05/2022]
|
5
|
Xiao L, Ran X, Zhong Y, Le Y, Li S. Serum creatine kinase levels are not associated with an increased need for continuous renal replacement therapy in patients with acute kidney injury following rhabdomyolysis. Ren Fail 2022; 44:893-901. [PMID: 35611437 PMCID: PMC9154772 DOI: 10.1080/0886022x.2022.2079523] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Severe rhabdomyolysis can lead to acute kidney injury (AKI). Previous studies have reported a benefit from continuous renal replacement therapy (CRRT) for rhabdomyolysis-associated AKI. Here, we investigated the potential for serum creatine kinase (CK) levels to be used as a marker for CRRT termination in patients with AKI following rhabdomyolysis. We compared different CK levels in patients after CRRT termination and observed their clinical outcomes. We retrospectively collected 86 cases with confirmed rhabdomyolysis-associated AKI, who were receiving CRRT in Tongji Hospital. Patients’ renal functions were assessed within 24 h of intermission, patients with urine output ≥ 1,000 mL and serum creatinine ≤ 265 umol/L were considered for CRRT termination. After termination, 33 patients with a CK > 5,000 U/L were included in an experimental group, and 53 patients with a CK < 5,000 U/L were included in a control group. Clinical outcomes were compared between the two groups. Higher CK levels, as well as worse renal functions, predicted the necessity of CRRT. After CRRT termination, the in-hospital mortality (p = 0.389) and Multiple Organ Dysfunction Syndrome (MODS) incidence (p = 0.064) were similar between the two groups, while the experimental group showed a significantly shorter in-hospital length of stay (p = 0.026) and Intensive Care Unit (ICU) length of stay (p = 0.038). CRRT termination may be independent of CK levels for patients with rhabdomyolysis-associated AKI, and this is contingent on their renal functions having recovered to an appropriate level.
Collapse
Affiliation(s)
- Luniu Xiao
- Tongji Medical College of Huazhonng University of Science and Technology, Wuhan, China
| | - Xiao Ran
- Tongji Medical College of Huazhonng University of Science and Technology, Wuhan, China.,Department of Intensive Care Unit of Tongji Hospital Affiliated to Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
| | - Yanxia Zhong
- Tongji Medical College of Huazhonng University of Science and Technology, Wuhan, China
| | - Yue Le
- Tongji Medical College of Huazhonng University of Science and Technology, Wuhan, China
| | - Shusheng Li
- Tongji Medical College of Huazhonng University of Science and Technology, Wuhan, China.,Department of Intensive Care Unit of Tongji Hospital Affiliated to Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
| |
Collapse
|
6
|
Bian Y, Xu T, Le Y, Li S. The Efficacy and Safety of Sodium Bicarbonate Ringer's Solution in Critically Ill Patients: A Retrospective Cohort Study. Front Pharmacol 2022; 13:829394. [PMID: 35431941 PMCID: PMC9006048 DOI: 10.3389/fphar.2022.829394] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Accepted: 03/07/2022] [Indexed: 11/13/2022] Open
Abstract
Background: Sodium bicarbonate Ringer’s solution has been widely used in clinical practice in recent years. There are few clinical studies on the efficacy and safety of this fluid among critically ill patients until now. Method: This retrospective cohort study included critically ill adult patients in the intensive care unit (ICU) of Tongji Hospital from 1 January 2019 to 31 December 2020. By reviewing exclusively the use of either sodium bicarbonate Ringer’s solution or saline for resuscitation or maintenance, the patients were included into two groups, respectively. The primary outcome was the major adverse kidney event within 30 days (MAKE30), including death, new receipt of renal replacement therapy, or persistent renal dysfunction. Safety outcomes were focused on arterial blood gas and plasma biochemical alterations, which might potentially be induced by the administration of bicarbonate Ringer’s solution. Result: A total of 662 patients were included in the cohort. Compared to the saline group, the bicarbonate Ringer’s group had a significantly lower rate of the new receipt of renal replacement therapy [adjusted odds ratio (OR) = 0.591, 95% confidence interval (CI), 0.406 to 0.861; p = 0.006]. There was no significant difference between the two groups in 30-day mortality, final creatinine level ≥200% of baseline, and major adverse kidney event within 30 days. In subgroup analysis, the incidence of MAKE30 was higher in the bicarbonate Ringer’s group than that of the saline group among patients with cardiovascular disease. The patients in the bicarbonate Ringer’s group had a longer length of intensive care unit stay than patients in the saline group, but their new renal replacement therapy days were shorter. No major alterations were found in arterial blood gas and plasma biochemical during the follow-up period. Conclusion: Compared to saline, sodium bicarbonate Ringer’s solution exhibited a potential renal function protective effect while causing no major alterations in arterial blood gas and plasma biochemistry. However, the application in patients with cardiovascular disease diagnosis at ICU admission should be cautious.
Collapse
Affiliation(s)
- Yi Bian
- Department of Emergency Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Department of Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Tingting Xu
- Department of Emergency Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Department of Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yue Le
- Department of Emergency Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Department of Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shusheng Li
- Department of Emergency Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Department of Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| |
Collapse
|
7
|
Le Y, Wang YY, Peng QZ, Wang BS, Huang B, Zhou JH, Jia GJ, Zhou Y, Xue M. [Langerhans cell histiocytosis involving pituitary and thyroid gland: a case report]. Zhonghua Nei Ke Za Zhi 2022; 61:327-330. [PMID: 35263977 DOI: 10.3760/cma.j.cn112138-20210601-00388] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Affiliation(s)
- Y Le
- Department of Endocrinology & Metabolism, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; the First Affiliated Hospital, Southern University of Science and Technology), Shenzhen 518020, China
| | - Y Y Wang
- Department of Thyroid & Parathyroid Surgery, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; the First Affiliated Hospital, Southern University of Science and Technology), Shenzhen 518020, China
| | - Q Z Peng
- Department of Pathology, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; the First Affiliated Hospital, Southern University of Science and Technology), Shenzhen 518020, China
| | - B S Wang
- Library of Department of Scientific Research, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; the First Affiliated Hospital, Southern University of Science and Technology), Shenzhen 518020, China
| | - B Huang
- Department of Endocrinology & Metabolism, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; the First Affiliated Hospital, Southern University of Science and Technology), Shenzhen 518020, China
| | - J H Zhou
- Department of Hematology, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; the First Affiliated Hospital, Southern University of Science and Technology), Shenzhen 518020, China
| | - G J Jia
- Department of Radiology, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; the First Affiliated Hospital, Southern University of Science and Technology), Shenzhen 518020, China
| | - Y Zhou
- Department of Endocrinology & Metabolism, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; the First Affiliated Hospital, Southern University of Science and Technology), Shenzhen 518020, China
| | - M Xue
- Department of Endocrinology & Metabolism, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; the First Affiliated Hospital, Southern University of Science and Technology), Shenzhen 518020, China
| |
Collapse
|
8
|
Bian Y, Le Y, Du H, Chen J, Zhang P, He Z, Wang Y, Yu S, Fang Y, Yu G, Ling J, Feng Y, Wei S, Huang J, Xiao L, Zheng Y, Yu Z, Li S. Efficacy and Safety of Anticoagulation Treatment in COVID-19 Patient Subgroups Identified by Clinical-Based Stratification and Unsupervised Machine Learning: A Matched Cohort Study. Front Med (Lausanne) 2021; 8:786414. [PMID: 35004751 PMCID: PMC8740912 DOI: 10.3389/fmed.2021.786414] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 11/26/2021] [Indexed: 12/12/2022] Open
Abstract
Objective: To explore the efficacy of anticoagulation in improving outcomes and safety of Coronavirus disease 2019 (COVID-19) patients in subgroups identified by clinical-based stratification and unsupervised machine learning. Methods: This single-center retrospective cohort study unselectively reviewed 2,272 patients with COVID-19 admitted to the Tongji Hospital between Jan 25 and Mar 23, 2020. The association between AC treatment and outcomes was investigated in the propensity score (PS) matched cohort and the full cohort by inverse probability of treatment weighting (IPTW) analysis. Subgroup analysis, identified by clinical-based stratification or unsupervised machine learning, was used to identify sub-phenotypes with meaningful clinical features and the target patients benefiting most from AC. Results: AC treatment was associated with lower in-hospital death risk either in the PS matched cohort or by IPTW analysis in the full cohort. A higher incidence of clinically relevant non-major bleeding (CRNMB) was observed in the AC group, but not major bleeding. Clinical subgroup analysis showed that, at admission, severe cases of COVID-19 clinical classification, mild acute respiratory distress syndrome (ARDS) cases, and patients with a D-dimer level ≥0.5 μg/mL, may benefit from AC. During the hospital stay, critical cases and severe ARDS cases may benefit from AC. Unsupervised machine learning analysis established a four-class clustering model. Clusters 1 and 2 were non-critical cases and might not benefit from AC, while clusters 3 and 4 were critical patients. Patients in cluster 3 might benefit from AC with no increase in bleeding events. While patients in cluster 4, who were characterized by multiple organ dysfunction (neurologic, circulation, coagulation, kidney and liver dysfunction) and elevated inflammation biomarkers, did not benefit from AC. Conclusions: AC treatment was associated with lower in-hospital death risk, especially in critically ill COVID-19 patients. Unsupervised learning analysis revealed that the most critically ill patients with multiple organ dysfunction and excessive inflammation might not benefit from AC. More attention should be paid to bleeding events (especially CRNMB) when using AC.
Collapse
Affiliation(s)
- Yi Bian
- Department of Emergency Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
- Department of Critical Care Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Yue Le
- Department of Emergency Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
- Department of Critical Care Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Han Du
- Germany Research Center for Artificial Intelligence, Saarland Informatics Campus, Saarbrücken, Germany
| | - Junfang Chen
- Intelligent Medicine Research Center, Greater Bay Area Institute of Precision Medicine (Guangzhou), Fudan University, Guangzhou, China
| | - Ping Zhang
- Department of Neurology, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Zhigang He
- Department of Emergency Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
- Department of Critical Care Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Ye Wang
- Department of Emergency Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
- Department of Critical Care Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Shanshan Yu
- Department of Emergency Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
- Department of Critical Care Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Yu Fang
- Department of Emergency Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
- Department of Critical Care Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Gang Yu
- Department of Emergency Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
- Department of Critical Care Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Jianmin Ling
- Department of Emergency Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
- Department of Critical Care Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Yikuan Feng
- Department of Emergency Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
- Department of Critical Care Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Sheng Wei
- Ministry of Education Key Laboratory of Environment and Health, Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jiao Huang
- Center for Evidence-Based and Translational Medicine, Zhongnan Hospital of Wuhan, Wuhan, China
| | - Liuniu Xiao
- Department of Emergency Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
- Department of Critical Care Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Yingfang Zheng
- Department of Emergency Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
- Department of Critical Care Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Zhen Yu
- Department of Critical Care Medicine, Renmin Hospital of Wuhan University, Wuhan, China
| | - Shusheng Li
- Department of Emergency Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
- Department of Critical Care Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| |
Collapse
|
9
|
Luan X, Herriot F, Le Y, Ianowski J, Tam J. 396: Activating TRPV1 and TRPM8 receptors in airway enhances intensity and duration of hypertonic saline treatment in swine airway. J Cyst Fibros 2021. [DOI: 10.1016/s1569-1993(21)01820-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
10
|
Le Y, Luan X, Tam J, Ianowski J. 371: Airway ionocytes’ function is bicarbonate transport, whereas secretory cells’ is in fluid secretion. J Cyst Fibros 2021. [DOI: 10.1016/s1569-1993(21)01795-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
11
|
Chen X, Le Y, He WY, He J, Wang YH, Zhang L, Xiong QM, Zheng XQ, Liu KX, Wang HB. Abnormal Insulin-like Growth Factor 1 Signaling Regulates Neuropathic Pain by Mediating the Mechanistic Target of Rapamycin-Related Autophagy and Neuroinflammation in Mice. ACS Chem Neurosci 2021; 12:2917-2928. [PMID: 34264648 DOI: 10.1021/acschemneuro.1c00271] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [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: 12/27/2022] Open
Abstract
Neuropathic pain is a chronic condition with little specific treatment. Insulin-like growth factor 1 (IGF1), interacting with its receptor, IGF1R, serves a vital role in neuronal and brain functions such as autophagy and neuroinflammation. Yet, the function of spinal IGF1/IGF1R in neuropathic pain is unclear. Here, we examined whether and how spinal IGF1 signaling affects pain-like behaviors in mice with chronic constriction injury (CCI) of the sciatic nerve. To corroborate the role of IGF1, we injected intrathecally IGF1R inhibitor (nvp-aew541) or anti-IGF1 neutralizing antibodies. We found that IGF1 (derived from astrocytes) in the lumbar cord increased along with the neuropathic pain induced by CCI. IGF1R was predominantly expressed on neurons. IGF1R antagonism or IGF1 neutralization attenuated pain behaviors induced by CCI, relieved mTOR-related suppression of autophagy, and mitigated neuroinflammation in the spinal cord. These findings reveal that the abnormal IGF1/IGF1R signaling contributes to neuropathic pain by exacerbating autophagy dysfunction and neuroinflammation.
Collapse
Affiliation(s)
- Xin Chen
- Department of Anesthesiology, Nan Fang Hospital, Southern Medical University, Guangzhou 510515, Guangdong, China
- Department of Anesthesiology, The First People’s Hospital of Foshan, 81# North of Ling Nan Road, Foshan 528000, Guangdong, China
| | - Yue Le
- Department of Anesthesiology, The First People’s Hospital of Foshan, 81# North of Ling Nan Road, Foshan 528000, Guangdong, China
- Department of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei, China
| | - Wan-you He
- Department of Anesthesiology, The First People’s Hospital of Foshan, 81# North of Ling Nan Road, Foshan 528000, Guangdong, China
| | - Jian He
- Department of Anesthesiology, The First People’s Hospital of Foshan, 81# North of Ling Nan Road, Foshan 528000, Guangdong, China
| | - Yun-hua Wang
- Department of Anesthesiology, The First People’s Hospital of Foshan, 81# North of Ling Nan Road, Foshan 528000, Guangdong, China
| | - Lei Zhang
- Department of Anesthesiology, The First People’s Hospital of Foshan, 81# North of Ling Nan Road, Foshan 528000, Guangdong, China
| | - Qing-ming Xiong
- Department of Anesthesiology, The First People’s Hospital of Foshan, 81# North of Ling Nan Road, Foshan 528000, Guangdong, China
| | - Xue-qin Zheng
- Department of Anesthesiology, The First People’s Hospital of Foshan, 81# North of Ling Nan Road, Foshan 528000, Guangdong, China
| | - Ke-xuan Liu
- Department of Anesthesiology, Nan Fang Hospital, Southern Medical University, Guangzhou 510515, Guangdong, China
| | - Han-bing Wang
- Department of Anesthesiology, The First People’s Hospital of Foshan, 81# North of Ling Nan Road, Foshan 528000, Guangdong, China
| |
Collapse
|
12
|
Guo JL, Wang HB, Wang H, Le Y, He J, Zheng XQ, Zhang ZH, Duan GR. Transesophageal echocardiography detection of air embolism during endoscopic surgery and validity of hyperbaric oxygen therapy: Case report. Medicine (Baltimore) 2021; 100:e26304. [PMID: 34115039 PMCID: PMC8202586 DOI: 10.1097/md.0000000000026304] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Accepted: 05/25/2021] [Indexed: 01/04/2023] Open
Abstract
INTRODUCTION Air embolism has the potential to be serious and fatal. In this paper, we report 3 cases of air embolism associated with endoscopic medical procedures in which the patients were treated with hyperbaric oxygen immediately after diagnosis by transesophageal echocardiography. In addition, we systematically review the risk factors for air embolism, clinical presentation, treatment, and the importance of early hyperbaric oxygen therapy efficacy after recognition of air embolism. PATIENT CONCERNS We present 3 patients with varying degrees of air embolism during endoscopic procedures, one of which was fatal, with large amounts of gas visible in the right and left heart chambers and pulmonary artery, 1 showing right heart enlargement with increased pulmonary artery pressure and tricuspid regurgitation, and 1 showing only a small amount of gas images in the heart chambers. DIAGNOSES Based on ETCO2 and transesophageal echocardiography (TEE), diagnoses of air embolism were made. INTERVENTIONS The patients received symptomatic supportive therapy including CPR, 100% O2 ventilation, cerebral protection, hyperbaric oxygen therapy and rehabilitation. OUTCOMES Air embolism can causes respiratory, circulatory and neurological dysfunction. After aggressive treatment, one of the 3 patients died, 1 had permanent visual impairment, and 1 recovered completely without comorbidities. CONCLUSIONS While it is common for small amounts of air/air bubbles to enter the circulatory system during endoscopic procedures, life-threatening air embolism is rare. Air embolism can lead to serious consequences, including respiratory, circulatory, and neurological impairment. Therefore, early recognition of severe air embolism and prompt hyperbaric oxygen therapy are essential to avoid its serious complications.
Collapse
Affiliation(s)
- Ji-ling Guo
- Guangdong Medical University. Wenming East Road No.2, Zhanjiang
- Department of Anesthesiology
| | | | | | - Yue Le
- Department of Anesthesiology
| | - Jian He
- Department of Anesthesiology
| | | | | | - Guang-rong Duan
- Department of Information, The First People's Hospital of Foshan, North of Ling Nan Road No. 81, Foshan, Guangdong, China
| |
Collapse
|
13
|
Le Y, Pack T. Low-dose radiation delays aging of human stem cells. Cytotherapy 2019. [DOI: 10.1016/j.jcyt.2019.04.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
14
|
Halilaj E, Le Y, Hicks JL, Hastie TJ, Delp SL. Modeling and predicting osteoarthritis progression: data from the osteoarthritis initiative. Osteoarthritis Cartilage 2018; 26:1643-1650. [PMID: 30130590 PMCID: PMC6469859 DOI: 10.1016/j.joca.2018.08.003] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 07/19/2018] [Accepted: 08/07/2018] [Indexed: 02/02/2023]
Abstract
OBJECTIVE The goal of this study was to model the longitudinal progression of knee osteoarthritis (OA) and build a prognostic tool that uses data collected in 1 year to predict disease progression over 8 years. DESIGN To model OA progression, we used a mixed-effects mixture model and 8-year data from the Osteoarthritis Initiative (OAI)-specifically, joint space width measurements from X-rays and pain scores from the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) questionnaire. We included 1243 subjects who at enrollment were classified as being at high risk of developing OA based on age, body mass index (BMI), and medical and occupational histories. After clustering subjects based on radiographic and pain progression, we used clinical variables collected within the first year to build least absolute shrinkage and selection (LASSO) regression models for predicting the probabilities of belonging to each cluster. Areas under the receiver operating characteristic curve (AUC) represent predictive performance on held-out data. RESULTS Based on joint space narrowing, subjects clustered as progressing or non-progressing. Based on pain scores, they clustered as stable, improving, or worsening. Radiographic progression could be predicted with high accuracy (AUC = .86) using data from two visits spanning 1 year, whereas pain progression could be predicted with high accuracy (AUC = .95) using data from a single visit. Joint space narrowing and pain progression were not associated. CONCLUSION Statistical models for characterizing and predicting OA progression promise to improve clinical trial design and OA prevention efforts in the future.
Collapse
Affiliation(s)
- E Halilaj
- Department of Bioengineering, Stanford University, USA.
| | - Y Le
- Department of Statistics, Stanford University, USA
| | - J L Hicks
- Department of Bioengineering, Stanford University, USA
| | - T J Hastie
- Department of Statistics, Stanford University, USA
| | - S L Delp
- Departments of Bioengineering, Mechanical Engineering, and Orthopaedic Surgery, Stanford University, USA
| |
Collapse
|
15
|
Jin YL, Chen LM, Le Y, Li YL, Hong YH, Jia KT, Yi MS. Establishment of a cell line with high transfection efficiency from zebrafish Danio rerio embryos and its susceptibility to fish viruses. J Fish Biol 2017; 91:1018-1031. [PMID: 28833122 DOI: 10.1111/jfb.13387] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Accepted: 06/22/2017] [Indexed: 06/07/2023]
Abstract
A cell line ZBE3 isolated from a continuous cell culture derived from zebrafish Danio rerio blastomeres by clonal growth was characterized. ZBE3 cells had been subcultured for >120 passages since the initial primary culture of the blastomeres. The ZBE3 cells grow stably at temperature from 20 to 32° C with an optimum temperature of 28° C in ESM2 or ESM4 medium with 15% foetal bovine serum (FBS). The optimum FBS concentration for ZBE3 cell growth ranged from 15 to 20%. Cytogenetical analysis indicated that the modal chromosome number of ZBE3 cells was 50, the same as the diploid chromosome number of D. rerio. Significant cytopathic effect was observed in ZBE3 cells after infection with redspotted grouper nervous necrosis virus, Singapore grouper iridovirus and grass carp reovirus, and the viral replication in the cells was confirmed by real-time quantitative PCR and transmission electron microscopy, indicating the susceptibility of ZBE3 cells to the three fish viruses. After transfected with pEGFP-N3 plasmid, ZBE3 cells showed a transfection efficiency of about 40% which was indicated by the percentage of cells expressing green fluorescence protein. The stable growth, susceptibility to fish viruses as well as high transfection efficiency make ZBE3 cells be a useful tool in transgenic manipulation, fish virus-host cell interaction and immune response in fish.
Collapse
Affiliation(s)
- Y L Jin
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Zhuhai Key Laboratory of Marine Bioresources and Environment, School of Marine Sciences, Sun Yat-sen University, Guangdong, China
| | - L M Chen
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Zhuhai Key Laboratory of Marine Bioresources and Environment, School of Marine Sciences, Sun Yat-sen University, Guangdong, China
| | - Y Le
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Zhuhai Key Laboratory of Marine Bioresources and Environment, School of Marine Sciences, Sun Yat-sen University, Guangdong, China
| | - Y L Li
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Zhuhai Key Laboratory of Marine Bioresources and Environment, School of Marine Sciences, Sun Yat-sen University, Guangdong, China
| | - Y H Hong
- Department of Biological Sciences, National University of Singapore, Science Drive 4, Singapore, 117543, Singapore
| | - K T Jia
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Zhuhai Key Laboratory of Marine Bioresources and Environment, School of Marine Sciences, Sun Yat-sen University, Guangdong, China
| | - M S Yi
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Zhuhai Key Laboratory of Marine Bioresources and Environment, School of Marine Sciences, Sun Yat-sen University, Guangdong, China
| |
Collapse
|
16
|
Ferro A, Bae H, Robertson S, Le Y, McNutt T, Mian O, Gergis C, Haviland C, DeWeese T, Song D. Reductions in Prostatic and Urethral Doses Are Associated With Less Acute Morbidity in Patients Undergoing Pd-103 Brachytherapy: Substantiation of the Rationale for Focal Therapy. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.1236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
17
|
Mian O, Gergis C, Ferro A, Le Y, Robertson S, Hobbs R, Prince J, McNutt T, DeWeese T, Lee J, Song D. A Prospective Study Evaluating Registered Ultrasound and Fluoroscopy (RUF) for Intraoperative Dose Calculation: Improved Accuracy Compared to Current Ultrasound-based Intraoperative Dosimetry. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.1211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
18
|
Wang XH, Qian YM, Miao L, Le Y, Du J. [Correlation between high risk type human papillomavirus E6/E7 mRNA and cervical cancer]. Zhonghua Liu Xing Bing Xue Za Zhi 2016; 37:1003-5. [PMID: 27453113 DOI: 10.3760/cma.j.issn.0254-6450.2016.07.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To investigate the correlation between the positive rate of high risk human papillomavirus(HPV)mRNA E6/E7 and cervical cancer, and provide evidence for the prevention and treatment of cervical cancer. METHODS A total of 100 cervical cancer cases and 100 healthy controls were selected in our hospital from January 2015 to December 2015. The fluorescence quantitative PCR and pathological examination on HPV E6/E7 mRNA were carried out. The correlation between HPV E6/E7 mRNA and cervical squamous epithelial lesions were analyzed. RESULTS In case group, the positive rate of HPV E6/E7 mRNA was 76.0%(76/100). In control group, the positive rate was 13.0%(13/100). The positive rate in case group was significantly higher than that in control group, and the difference was statistically significant(χ(2)=24.522, P<0.001). The positive predictive value and negative predictive value of the two groups were compared, and the difference was not significant(P>0.05). The positive rate of HPV E6/E7 mRNA was significantly higher than high-grade squamous intraepithelial lesion(SIL)rate(26.1%), low-grade SIL rate(17.6%)and atypical squamous cell hyperplasia rate(6.7%), the difference was statistically significant(χ(2)=7.615, P= 0.001; χ(2) =9.114, P=0.001; χ(2)=18.241, P<0.001). CONCLUSIONS The detection rate of HPV E6/E7 mRNA in cervical cancer patients was high. And with the increased severity of cervical squamous epithelial lesions, the positive rate of HPV E6/E7 mRNA increased.
Collapse
Affiliation(s)
- X H Wang
- Department of Obstetrics and Gynecology, 101 Hospital of Chinese People's Liberation Army, Wuxi 214044, China
| | | | | | | | | |
Collapse
|
19
|
Park S, Le Y, Song D, Lee J. WE-AB-BRA-12: Post-Implant Dosimetry in Prostate Brachytherapy by X-Ray and MRI Fusion. Med Phys 2016. [DOI: 10.1118/1.4957741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
20
|
Parekh A, Le Y, Duhon M, Kummerlowe M, Herman J, Hobbs R. Dosimetric Comparison of High Dose Rate (HDR) Brachytherapy and Intensity Modulated Radiation Therapy (IMRT) for Rectal Adenocarcinoma. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.1004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
21
|
Le Y, Chandran P, Richardson R, Allan D. Functional perturbations in mesenchymal stromal cells from patients with acute myeloid leukemia and following high-dose irradiation. Exp Hematol 2015. [DOI: 10.1016/j.exphem.2015.06.177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
22
|
Wong J, Velarde E, Iordachita I, Ding K, Li B, Ng S, Le Y. OC-0248: A unifying system for mechanical and (relative) dosimetry quality assurance in radiation therapy. Radiother Oncol 2015. [DOI: 10.1016/s0167-8140(15)40246-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
23
|
Hobbs R, Le Y, Armour E, Efron J, Azad N, Wahl R, Gearhart S, Herman J. SU-E-J-270: Study of PET Response to HDR Brachytherapy of Rectal Cancer. Med Phys 2014. [DOI: 10.1118/1.4888324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
24
|
Kuo N, Dehghan E, Le Y, Deguet A, Burdette E, Fichtinger G, Prince J, Song D, Lee J. SU-D-BRF-07: Ultrasound and Fluoroscopy Based Intraoperative Image-Guidance System for Dynamic Dosimetry in Prostate Brachytherapy. Med Phys 2014. [DOI: 10.1118/1.4887893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
25
|
Le Y, Lee J, Robinson A, Song D. SU-C-WAB-06: Deformable Registration of Post-Implant MRI to Intra-Operative Ultrasound Images for Permanent Prostate Brachytherapy Treatment Assessment. Med Phys 2013. [DOI: 10.1118/1.4813958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
26
|
Hobbs R, Le Y, Armour E, Efron J, Azad N, Diaz L, Wahl R, Sgouros G, Gearhardt S, Hermann J. Voxelized Dose--FDG-PET Response in HDR Brachytherapy of Rectal Cancer. Pract Radiat Oncol 2013; 3:S28-9. [DOI: 10.1016/j.prro.2013.01.097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
27
|
Yovino S, Le Y, Kleinberg L, Grossman S, Wong J. Eliminating or Modifying Vertex Fields Significantly Reduces Normal Tissue Dose in Brain Tumor Patients. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
28
|
Kumar R, Starmer H, Alcorn S, Murano E, Le Y, Quon H. Radiation Dose to the Floor of Mouth Muscles Predicts Swallowing Complications After Chemoradiation in Oropharyngeal Squamous Cell Cancer. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.536] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
29
|
Le Y, He Q, Lee J, Song D. Development of a Nontemplate-based Permanent Prostate Brachytherapy Treatment Planning System for Penile Bulb Avoidance. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.1032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
30
|
Yang Y, Wong J, McNutt T, Tryggestad E, Le Y. SU-E-T-385: Accelerated Beam Delivery with MLC Gaps in IMRT Fields. Med Phys 2012; 39:3793. [DOI: 10.1118/1.4735474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
31
|
Le Y, He Q, Lee J, Song D. SU-E-T-324: Evaluation of Prostate Volume and Shape Change after Permanent Prostate Brachytherapy Using Implanted Seed Displacement Analysis. Med Phys 2012. [DOI: 10.1118/1.4735411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
32
|
Le Y, Alexander R, Armour E, Song D. OC-34 A NOVEL METHOD TO QUANTIFY PROSTATE SEED IMPLANT PLAN QUALITY BY PERFORMING INDIVIDUAL SEED DISPLACEMENT ANALYSIS. Radiother Oncol 2012. [DOI: 10.1016/s0167-8140(12)72001-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
33
|
Hobbs R, Le Y, Armour E, Efron J, Azad N, Diaz L, Qiu H, Sgouros G, Gearhart S, Herman J. PO-404 VOXELIZED DOSE-RESPONSE STUDY IN HIGH DOSE RATE (HDR) 192IR BRACHYTHERAPY FOR RECTAL CANCER. Radiother Oncol 2012. [DOI: 10.1016/s0167-8140(12)72370-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
34
|
Jain A, Deguet A, Iordachita I, Chintalapani G, Vikal S, Blevins J, Le Y, Armour E, Burdette C, Song D, Fichtinger G. Intra-operative 3D guidance and edema detection in prostate brachytherapy using a non-isocentric C-arm. Med Image Anal 2012; 16:731-43. [PMID: 21168357 PMCID: PMC4695983 DOI: 10.1016/j.media.2010.07.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [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: 09/14/2009] [Revised: 03/01/2010] [Accepted: 07/22/2010] [Indexed: 11/23/2022]
Abstract
PURPOSE Brachytherapy (radioactive seed insertion) has emerged as one of the most effective treatment options for patients with prostate cancer, with the added benefit of a convenient outpatient procedure. The main limitation in contemporary brachytherapy is faulty seed placement, predominantly due to the presence of intra-operative edema (tissue expansion). Though currently not available, the capability to intra-operatively monitor the seed distribution, can make a significant improvement in cancer control. We present such a system here. METHODS Intra-operative measurement of edema in prostate brachytherapy requires localization of inserted radioactive seeds relative to the prostate. Seeds were reconstructed using a typical non-isocentric C-arm, and exported to a commercial brachytherapy treatment planning system. Technical obstacles for 3D reconstruction on a non-isocentric C-arm include pose-dependent C-arm calibration; distortion correction; pose estimation of C-arm images; seed reconstruction; and C-arm to TRUS registration. RESULTS In precision-machined hard phantoms with 40-100 seeds and soft tissue phantoms with 45-87 seeds, we correctly reconstructed the seed implant shape with an average 3D precision of 0.35 mm and 0.24 mm, respectively. In a DoD Phase-1 clinical trial on six patients with 48-82 planned seeds, we achieved intra-operative monitoring of seed distribution and dosimetry, correcting for dose inhomogeneities by inserting an average of over four additional seeds in the six enrolled patients (minimum 1; maximum 9). Additionally, in each patient, the system automatically detected intra-operative seed migration induced due to edema (mean 3.84 mm, STD 2.13 mm, Max 16.19 mm). CONCLUSIONS The proposed system is the first of a kind that makes intra-operative detection of edema (and subsequent re-optimization) possible on any typical non-isocentric C-arm, at negligible additional cost to the existing clinical installation. It achieves a significantly more homogeneous seed distribution, and has the potential to affect a paradigm shift in clinical practice. Large scale studies and commercialization are currently underway.
Collapse
Affiliation(s)
- A Jain
- Johns Hopkins University, Baltimore, MD 21210, United States.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
35
|
Le Y, Song D, Armour E. Individual Seed Displacement Analysis to Evaluate Prostate Implant Treatment Plan Quality. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
36
|
Cai K, Qi D, Wang O, Chen J, Liu X, Deng B, Qian L, Liu X, Le Y. TNF-α acutely upregulates amylin expression in murine pancreatic beta cells. Diabetologia 2011; 54:617-26. [PMID: 21116608 DOI: 10.1007/s00125-010-1972-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2010] [Accepted: 10/22/2010] [Indexed: 12/28/2022]
Abstract
AIMS/HYPOTHESIS Amylin, a secretory protein mainly produced by pancreatic beta cells, is elevated in the circulation of patients with diseases related to acute and chronic inflammation, including acute pancreatitis, pancreas graft rejection, obesity and insulin resistance. TNF-α is involved in these disorders. We investigated the effect of TNF-α on amylin levels and the underlying mechanisms, using murine pancreatic beta cell line MIN6 and pancreatic islets. METHODS Amylin, proinsulin and prohormone convertase 1/3, 2 (Pc1/3, Pc2 [also known as Pcsk1/3 and Pcsk2, respectively]) mRNA levels, and amylin promoter and nuclear factor κB (NF-κB) activation were examined by real-time PCR and luciferase reporter assay, respectively. Amylin protein level and mitogen-activated protein kinase phosphorylation were detected by western blot. Activator protein 1 (AP1) activation was examined by electrophoretic mobility shift assay (EMSA). RESULTS TNF-α acutely induced amylin expression at the transcriptional level and increased proamylin and the intermediate form of amylin in MIN6 cells and islets. However, it had no effect on proinsulin, Pc1/3 and Pc2 expression. Studies with (1) MIN6 cells treated with inhibitors of MEK1/2, c-Jun-N-terminal kinase (JNK) or protein kinase Cζ (PKC(ζ)), (2) MIN6 cells expressing a c-Jun-dominant negative construct and (3) islets from Fos knockout mice demonstrated that TNF-α induced amylin expression through the PKC(ζ)-extracellular signal-regulated kinase (ERK)/JNK pathways. EMSA showed that (PKC(ζ)), JNK and ERK1/2 were involved in TNF-α-induced AP1 activation, suggesting that TNF-α induces murine amylin expression through the (PKC(ζ)) - ERK1/2 - AP and PKC(ζ) - JNK - AP1 pathways. Further studies showed that TNF-α also induced murine amylin expression through the phosphatidylinositol 3 kinase-NF-κB signalling pathway and enhanced human amylin promoter activation through NF-κB and AP1. CONCLUSIONS/INTERPRETATION TNF-α acutely induces amylin gene expression in beta cells through multiple signalling pathways, possibly contributing to amylin elevation in acute inflammation-related pancreatic disorders.
Collapse
Affiliation(s)
- K Cai
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Graduate School of the Chinese Academy of Sciences, Shanghai, People's Republic of China
| | | | | | | | | | | | | | | | | |
Collapse
|
37
|
Le Y, Song D, Ford E, Kang J, Wong J. Stereotactic Body Radiotherapy (SBRT) Treatment of Lung Lesions using Volumetric Modulated Arc Therapy (VMAT). Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.1846] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
38
|
Song D, Armour E, Le Y, Zhang Z. Reduced Dose to Urethra and Rectum with the use of Variable Needle Spacing in Prostate Brachytherapy: A Potential Advantage of Robotic Brachytherapy. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
39
|
Zhu X, Chen J, Han F, Cheng M, Xu L, Zhang L, Ding X, Le Y. Efficacy and safety of losartan in treatment of hyperuricemia and posttransplantation erythrocytosis: results of a prospective, open, randomized, case-control study. Transplant Proc 2010; 41:3736-42. [PMID: 19917377 DOI: 10.1016/j.transproceed.2009.06.225] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2008] [Revised: 04/28/2009] [Accepted: 06/01/2009] [Indexed: 10/20/2022]
Abstract
BACKGROUND Hyperuricemia and posttransplantation erythrocytosis (PTE) are frequent complications after kidney transplantation and are important risk factors for cardiovascular events. Losartan decreases serum uric acid and hemoglobin (Hb) concentrations and may be a useful agent for treatment of hyperuricemia and PTE. OBJECTIVE To evaluate the influence of losartan on serum creatinine (SCr), serum uric acid, and hemoglobin (Hb) concentrations in patients after kidney transplantation and to evaluate the safety profile of losartan in these patients. PATIENTS AND METHODS Sixty-six Han Chinese patients (43 men and 23 women; mean [SD] age, 40.45 [11.50] years) were enrolled in the study. All patients had undergone a first cadaveric donor kidney transplantation at least 3 months previously and had stable graft function with SCr concentration less than 176.8 micromol/L and Hb concentration greater than 110 g/L. The patients were divided into 2 groups (losartan group, n = 34; and control group, n = 32) according to the odevity of patient identification number. Patients in the losartan group received losartan, 50 mg/d; patients in the control group did not receive losartan. Each patient was followed up for 6 months. RESULTS Nine patients in the losartan group and 5 patients in the control group dropped out because of acute renal insufficiency, anemia, acute rejection, or poor compliance. The serum uric acid concentration in the losartan group continuously decreased at months 1, 2, 3, and 6 (P = .12, P = .01, P = .04, and P = .005 compared with baseline, and P = .02, P = .003, P = .02, and P = .006 compared with control), especially in the patients with hyperuricemia (P = .02, P < .001, P = .003, and P < .001 compared with baseline, and P = .02, P = .002, P = .02, and P = .002 compared with control). The Hb level in the losartan group decreased significantly at months 1, 2, 3, and 6 (P = .003, P < .001, P = .004, and P = 0.02 compared with baseline, and P = .001, P < .001, P = .001, and P = .005 compared with control), especially in patients with PTE. In patients without PTE, there was no significant decline in Hb concentration in the losartan group compared with baseline. There was no significant decline in estimated glomerular filtration rate in the losartan group. CONCLUSIONS Losartan may be an effective agent for treatment of hyperuricemia and PTE in Han Chinese patients after kidney transplantation. However, in some patients, losartan may not be safe.
Collapse
Affiliation(s)
- X Zhu
- Center for Renal Transplantation, Jiulisong Hospital, Zhejiang, China
| | | | | | | | | | | | | | | |
Collapse
|
40
|
Le Y, Tryggestad E, Ford E, McNutt T, Kleinberg L, Lim M, Rigamonti D, Wong J. Dosimetric Impact of Intra-fraction Motion on Image Guided Stereotactic Body Radiotherapy of Spinal Metastasis. Int J Radiat Oncol Biol Phys 2009. [DOI: 10.1016/j.ijrobp.2009.07.1572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
41
|
Smith K, Le Y, Ford E, McNutt T, Tryggestad E, Wong J. Image Guided Stereotactic Radiosurgery (SRS) Treatment of Multiple Brain Metastases using Volumetric Modulated Arc Therapy (VMAT). Int J Radiat Oncol Biol Phys 2009. [DOI: 10.1016/j.ijrobp.2009.07.1579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
42
|
Ren X, Zhang X, Zhang X, Gu W, Chen K, Le Y, Lai M, Zhu Y. Type 2 diabetes mellitus associated with increased risk for colorectal cancer: evidence from an international ecological study and population-based risk analysis in China. Public Health 2009; 123:540-4. [PMID: 19664792 DOI: 10.1016/j.puhe.2009.06.019] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2009] [Revised: 06/01/2009] [Accepted: 06/26/2009] [Indexed: 12/29/2022]
Abstract
OBJECTIVE To study the association between type 2 diabetes mellitus (T2DM) and colorectal cancer (CRC). STUDY DESIGN An international ecological study and a population-based risk analysis. METHODS Prevalence data for T2DM and incidence data for CRC were collected from 170 countries, and Spearman's correlation was calculated between T2DM and CRC. In the Nan-Hu district of Jia-Xing city, Zhejiang province, China, the incidence of CRC among T2DM patients between 1 January 2002 and 30 June 2002 was identified through record linkage between the Diabetic Surveillance and Registry Database with the Cancer Surveillance and Registry Database. Standardized incidence ratios (SIRs) and 95% confidence intervals were used to estimate the risk of CRC among T2DM patients. RESULTS Significant positive correlations (r(s)=0.534 and 0.597 in males and females, respectively) were found between the prevalence of T2DM and the incidence of CRC. Sixty-four cases of CRC were found among 7938 T2DM patients. The SIR for CRC among T2DM patients was 1.588 (95% CI 1.199-1.977). For male T2DM patients, the SIR for CRC was 1.821 (95% CI 1.234-2.408), compared with 1.364 (95% CI 0.85-1.879) among female T2DM patients. Significant increased risks for colon cancer were found, with an SIR of 1.899 (95% CI 1.139-2.658) in male T2DM patients. Female T2DM patients showed a borderline significant risk for colon cancer, with an SIR of 1.687 (95% CI 0.948-2.426). However, no significant associations were found between T2DM and risk for rectal cancer among males (SIR 1.723, 95% CI 0.786-2.66) or females (SIR 0.906, 95% CI 0.235-1.578) (all P>0.05). CONCLUSIONS T2DM was associated with increased risk for CRC, and this association was more evident for colon cancer and among male diabetic patients.
Collapse
Affiliation(s)
- X Ren
- Department of Epidemiology and Biostatistics, Zhejiang University School of Medicine, Hangzhou 310058, Zhejiang, PR China
| | | | | | | | | | | | | | | |
Collapse
|
43
|
Le Y, Tryggestad E, Ford E, Wong J. SU-FF-T-534: A Novel Image Guided Stereotactic Radiosurgery Strategy Employing Virtual Frame Preplanning and Frame Based Treatment. Med Phys 2009. [DOI: 10.1118/1.3182032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
44
|
Poon E, Le Y, Williamson JF, Verhaegen F. BrachyGUI: an adjunct to an accelerated Monte Carlo photon transport code for patient-specific brachytherapy dose calculations and analysis. ACTA ACUST UNITED AC 2008. [DOI: 10.1088/1742-6596/102/1/012018] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
45
|
Jain A, Deguet A, Iordachita I, Chintalapani G, Blevins J, Le Y, Armour E, Burdette C, Song D, Fichtinger G. Intra-operative 3D guidance in prostate brachytherapy using a non-isocentric C-arm. Med Image Comput Comput Assist Interv 2008; 10:9-17. [PMID: 18044547 DOI: 10.1007/978-3-540-75759-7_2] [Citation(s) in RCA: 11] [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] [Indexed: 02/16/2023]
Abstract
Intra-operative guidance in Transrectal Ultrasound (TRUS) guided prostate brachytherapy requires localization of inserted radioactive seeds relative to the prostate. Seeds were reconstructed using a typical C-arm, and exported to a commercial brachytherapy system for dosimetry analysis. Technical obstacles for 3D reconstruction on a non-isocentric C-arm included pose-dependent C-arm calibration; distortion correction; pose estimation of C-arm images; seed reconstruction; and C-arm to TRUS registration. In precision-machined hard phantoms with 40-100 seeds, we correctly reconstructed 99.8% seeds with a mean 3D accuracy of 0.68 mm. In soft tissue phantoms with 45-87 seeds and clinically realistic 15 degrees C-arm motion, we correctly reconstructed 100% seeds with an accuracy of 1.3 mm. The reconstructed 3D seed positions were then registered to the prostate segmented from TRUS. In a Phase-1 clinical trial, so far on 4 patients with 66-84 seeds, we achieved intra-operative monitoring of seed distribution and dosimetry. We optimized the 100% prescribed iso-dose contour by inserting an average of 3.75 additional seeds, making intra-operative dosimetry possible on a typical C-arm, at negligible additional cost to the existing clinical installation.
Collapse
Affiliation(s)
- A Jain
- Johns Hopkins University, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|
46
|
Song D, Deguet A, Jain A, Armour E, Le Y, Iordachita I, Blevins J, Burdette E, Fichtinger G. A Pilot Study of Intraoperative Dynamic Dosimetry Using Registered Ultrasound and Fluoroscopy (RUF) for Permanent Prostate Brachytherapy. Int J Radiat Oncol Biol Phys 2007. [DOI: 10.1016/j.ijrobp.2007.07.1409] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
47
|
Xu LH, Fang JP, Huang WG, Xu HG, Weng WJ, Kao GS, Le Y. Marrow graft rejection by repeated transfusions of allogeneic donor spleen cells. Bone Marrow Transplant 2007; 40:691-8. [PMID: 17660838 DOI: 10.1038/sj.bmt.1705791] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Many hematological diseases require long-term transfusion support, which causes production of donor-reactive antibodies in sensitized recipients. Sensitized patients are at an increased risk for graft rejection when they undergo allogeneic hematopoietic stem cell transplantation (allo-HSCT). Here, we established a highly sensitized murine model to investigate the mechanism of donor graft rejection. After BALB/c mice were repeatedly transfused with allogeneic spleen cells from C57BL/6 mice, there was a significant increase in complement-dependent cytotoxicity in the serum of sensitized mice. For transplantation, 1 x 10(7) bone marrow cells (BMCs) from C57BL/6 mice were injected into lethally irradiated recipient BALB/c mice. Sensitized mice died between 12 and 15 days post-transplantation, while non-sensitized mice remained alive after 28 days. The hematopoietic recovery rate declined over time in sensitized recipients. The homing trace assay showed a rapid disappearance of donor BMCs in the spleen and bone marrow of sensitized recipients. In addition, the recipient cells and antibodies in the sensitized serum were capable of inducing high level of cell- and complement-mediated cytotoxicity to the donor graft. Our finding may explain the impaired hematopoietic stem cell homing and poor hematopoietic engraftment observed in highly sensitized allo-HSCT patients.
Collapse
Affiliation(s)
- L H Xu
- Department of Pediatrics, Second Affiliated Hospital of Zhongshan University, Guangzhou, PR China
| | | | | | | | | | | | | |
Collapse
|
48
|
Glodek AM, Le Y, Dykxhoorn DM, Park SY, Mostoslavsky G, Mulligan R, Lieberman J, Beggs HE, Honczarenko M, Silberstein LE. Focal adhesion kinase is required for CXCL12-induced chemotactic and pro-adhesive responses in hematopoietic precursor cells. Leukemia 2007; 21:1723-32. [PMID: 17568820 DOI: 10.1038/sj.leu.2404769] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.2] [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: 11/08/2022]
Abstract
Hematopoietic stem/progenitor cells (HSC/P) reside in the bone marrow in distinct anatomic locations (niches) to receive growth, survival and differentiation signals. HSC/P localization and migration between niches depend on cell-cell and cell-matrix interactions, which result from the cooperation of cytokines, chemokines and adhesion molecules. The CXCL12-CXCR4 pathway, in particular, is essential for myelopoiesis and B lymphopoiesis but the molecular mechanisms of CXCL12 action remain unclear. We previously noted a strong correlation between prolonged CXCL12-mediated focal adhesion kinase (FAK) phosphorylation and sustained pro-adhesive responses in progenitor B cells, but not in mature B cells. Although FAK has been well studied in adherent fibroblasts, its function in hematopoietic cells is not defined. We used two independent approaches to reduce FAK expression in (human and mouse) progenitor cells. RNA interference (RNAi)-mediated FAK silencing abolished CXCL12-induced responses in human pro-B leukemia, REH cells. FAK-deficient REH cells also demonstrated reduced CXCL12-induced activation of the GTPase Rap1, suggesting the importance of FAK in CXCL12-mediated integrin activation. Moreover, in FAK(flox/flox) hematopoietic precursor cells, Cre-mediated FAK deletion resulted in impaired CXCL12-induced chemotaxis. These studies suggest that FAK may function as a key intermediary in signaling pathways controlling hematopoietic cell lodgment and lineage development.
Collapse
Affiliation(s)
- A M Glodek
- Department of Pathology, Joint Program in Transfusion Medicine, Children's Hospital Boston, Boston, MA, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|
49
|
Le Y, Armour E, Wong J. SU-FF-T-214: Evaluation of Heterogeneity Effect in Intra-Operative HDR (IOHDR) Brachytherapy Dose Calculation Using Monte Carlo Simulation and GAFCHROMIC EBT Film Measurement. Med Phys 2007. [DOI: 10.1118/1.2760875] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
50
|
Jain A, Deguet A, Iordachita I, Chintalapani G, Blevins J, Le Y, Armour E, Burdette C, Song D, Fichtinger G. TH-C-M100J-07: C-Arm Based Intra-Operative Dosimetry for Prostate Brachytherapy. Med Phys 2007. [DOI: 10.1118/1.2761655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|