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Agrawal V, Kaylor K, Fenton-Kerimian M, Golden E, Kang J, Ng J, Formenti S. Feasibility of Hypo-fractionated Radiation Therapy to the Breast and Nodal Stations after Neo-Adjuvant Systemic Therapy and Surgery (NCT02917421). Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.1166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Venturella R, Stewart E, Al-Hendy A, Kang J, McKain L, Lukes A. Relugolix Combination Therapy Improves Hemoglobin Levels in Anemic Women with Uterine Fibroids: Results from the Liberty Phase 3 Program. J Minim Invasive Gynecol 2020. [DOI: 10.1016/j.jmig.2020.08.315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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53
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Katz A, Kang J. Efficacy and Toxicity of Stereotactic Body Radiation Therapy for Localized Prostate Cancer: A Twelve-Year Study. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kang J, Men Y, Wang J, Zhai Y, Deng L, Wang W, Liu W, Wang X, Bi N, Xiao Z, Liang J, Lv J, Zhou Z, Feng Q, Chen D, Wang L, Hui Z. Optimal Timing of Postoperative Radiotherapy (PORT) for Patients with pⅢA-N2 Non-Small Cell Lung Cancer (NSCLC) Receiving Complete Resection Followed by Adjuvant Chemotherapy. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.1293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Kang J, Park K, Rhee T, Lee H, Ki Y, Han J, Yang H, Kang H, Koo B, Kim H. Impact of complete revascularization for acute myocardial infarction with multivessel coronary artery disease in diabetes mellitus patients. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Clinical benefits of complete revascularization (CR) in acute myocardial infarction (AMI) patients are unclear. Moreover, the benefit of CR is unknown in AMI with Diabetes Mellitus (DM) patient.
Objectives
We sought to compare prognosis of CR and incomplete revascularization (IR) in patients with AMI and multivessel disease, according to the presence of DM.
Methods
A total of 2,150 AMI patients with multivessel coronary artery disease were analyzed. CR was defined based on angiographic image. The primary endpoints of this study was patient oriented composite outcome (POCO) defined as a composite of all cause death, any myocardial infarction, and any revascularization within 3 years.
Results
Overall, 3-year POCO were significantly lower in patients receiving angiographic CR (985 patients, 45.8%) compared with IR (1165 patients, 54.2%). When divided into subgroups according to the presence of DM, CR reduced 3-year clinical outcomes in the non-DM group but not in the DM group (POCO: 11.7% vs. 23.2%, p<0.001, any revascularization: 7.2% vs. 10.8%, p=0.024 in the non-DM group, POCO: 24.3% vs. 27.8%, p=0.295, any revascularization: 13.3% vs. 11.3%, p=0.448 in the DM group, for CR vs. IR). Multivariate analysis showed that CR significantly reduced 3-year POCO (HR 0.52, 95% CI 0.38–0.71) only in the non-DM group.
Conclusion
In AMI patients with multivessel disease, CR may be ineffective in improving clinical outcomes in patients with DM.
Funding Acknowledgement
Type of funding source: None
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Ma Z, Yuan M, Bao Y, Wang Y, Men Y, Kang J, Sun X, Zhao M, Yang X, Sun S, Hui Z. Role of Neoadjuvant and Adjuvant Radiotherapy in Resectable Esophageal and Esophagogastric Junction Cancers: A Systematic Review and Network Meta-Analysis. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.1977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Bao Y, Yuan M, Ma Z, Wang Y, Men Y, Kang J, Sun X, Zhao M, Yang X, Sun S, Hui Z. Comparation of Different Neoadjuvant Treatments for Resectable Locoregional Esophageal Cancer – A Systematic Review and Network Meta-Analysis (NMA). Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.1858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Deng L, Hui Z, Men Y, Kang J, Sun X, Wang J, Wang W, Bi N, Zhou Z, Xiao Z. The Efficacy of Local Radiotherapy after Failure of First-Line Treatment for Piiia-N2 Non-Small Cell Lung Cancer. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.1312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Kang J, Demaria S, Cardenes H, Pilones K, Jozsef G, Ng J, Ballman K, Formenti S. Effect of Radiotherapy Variables on Circulating Effectors of Immune Response. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.1684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Agrawal V, Nagar H, Formenti S, Kang J. Phase I Trial Of MRI-Linac Based Stereotactic Body Radiation Therapy With Simultaneous Integrated Boost For Localized Prostate Cancer (NCT03664193). Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Yuan M, Bao Y, Ma Z, Wang Y, Men Y, Kang J, Sun X, Zhao M, Yang X, Sun S, Hui Z. Neoadjuvant and Adjuvant Treatments for Resectable Esophageal Cancer: A Network Meta-Analysis. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.1955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Bao Y, Men Y, Kang J, Sun X, Zhao M, Yang X, Sun S, Yuan M, Ma Z, Hui Z. Postoperative Radiotherapy (PORT) Improves the Survival of Patients With N2 Non-Small Cell Lung Cancer (NSCLC) with Regional Nodes Examined (RNE) ≤16 - A Real World Study Using Surveillance, Epidemiology, and End Results (SEER) Database. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.1236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Kang J, Lee H, Han S, Cho H. Predictors of mortality in patients with VA-extracorporeal membrane oxygenation. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Venoarterial extracorporeal membrane oxygenation (VA-ECMO) support is a lifesaving tool used in the treatment of cardiogenic shock, acute heart failure, or extracorporeal cardiopulmonary resuscitation (CPR). We report on a single center experience with ECMO and aim to identify the prognostic markers for in-hospital mortality and death at 72 hours after ECMO.
Methods
Between 2011 and 2019 we evaluated 131 patients, who received ECMO. Collected data was analyzed to identify baseline characteristic, outcomes including clinical variables predictive of poor outcome.
Results
The mean age was 62.5 years, 67.2% were male patients, with prior CPR in 61.8%. The annual number of VA-ECMO procedures steadily increased, whereas in-hospital mortality is decreasing. Within the total cohort, the indication for VA-ECMO was cardiac arrest in 19.1%, acute coronary syndrome in 41.2%, acute heart failure in 23.7%, and myocarditis in 10.7%.
Overall in-hospital mortality was 58.8%. Multivariate logistic regression model revealed presence of malignancy, history of revascularization, duration of cardiac arrest, and low BMI as independent predictors for mortality in 72 hours after ECMO (table). On the other hand, predictors of in-hospital mortality were prior congestive heart failure, male, and history of malignancy. The C-statistic for discriminating mortality in 72 hours after ECMO with the duration of cardiac arrest was 0.67 (figure).
Conclusions
Although the use of ECMO as a last line in the treatment of critical patients measures constitutes an important improvement in their care; with 41.2% overall survival; patient selection and timing of ECMO initiation remains challenging. The importance of consideration for ECMO use earlier in course of illness rather than later.
Funding Acknowledgement
Type of funding source: None
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Men Y, Kang J, Sun X, Wang J, Wang W, Deng L, Zhang T, Wang X, BI N, Liang J, Feng Q, Chen D, Zhou Z, Wang L, Hui Z. Postoperative Radiotherapy (PORT) For Patients with pⅢA-N2 EGFR-mutated Non-Small Cell Lung Cancer (NSCLC) after Complete Resection and Adjuvant Chemotherapy. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.1192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Kim H, Mun D, Kang J, Yun N, Joung B. Intense cardiac-targeted small extracellular vesicles-mediated delivery of RAGE siRNA attenuates inflammation in rat myocarditis model. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.3610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Despite advances in the field and new therapeutics being developed, heart disease remains the leading cause of mortality worldwide. Small extracellular vesicles (sEV) are 30–150 nm in diameter and ferry RNA and proteins to cells. sEV are a natural carrier of many signaling molecules and play an important role in heart disease. However, the high probability of off-target effects associated with these carriers is a major barrier to translation into clinical application.
Purpose
Our aim was to evaluate whether sEVs engineered to express potent cardiac targeting peptides (CTPs) could deliver siRNA to the heart and exert a therapeutic effect.
Methods
We use vectors encoding LAMP2B (sEV) or CTP-LAMP2B (PsEV) into HEK 293 cells expressing. sEVs were purified from culture media of HEK 293 cells by serial centrifugation followed by tangential flow filtration (TFF) system. sEV and PsEV were loaded with siRNAs by Exo-Fect™ exosome transfection reagent, and were treated into H9C2 rat cardiomyocyte. TNF-alpha were then added to the cells to induce inflammation. And sEVs were intravenously injected into myocarditis rat. Inflammation factors of in vitro and in vivo inflammation model were identified by western blot. Echocardiographic examination was also performed in rat.
Results
The successful development of PsEVs was analyzed by Western blot and TEM. We observed a 4 fold increase from that of the previously developed sEVs in H9C2 cells and a 200% increase in cardiac-specific delivery without toxicity in rat model. AGE is involved in proinflammatory/pro-apoptotic processes. To block RAGE, we loaded RAGE siRNA (siRAGE) in sEV that had high expression of PsEV. Characteristics of sEVs were maintained despite siRNA load.In inflammatory cell models and rat disease models, PsEV-treated groups significantly reduced molecular levels associated with inflammatory responses such as RAGE, IL-6, TNF-alpha, COX2, HMGB1, and p-p65 / p65.
Conclusions
Our results suggest that PsEV can potentially serve as a treatment delivery vehicle for heart disease.
Scheme
Funding Acknowledgement
Type of funding source: None
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Jang HJ, Lee A, Kang J, Song IH, Lee SH. Prediction of clinically actionable genetic alterations from colorectal cancer histopathology images using deep learning. World J Gastroenterol 2020; 26:6207-6223. [PMID: 33177794 PMCID: PMC7596644 DOI: 10.3748/wjg.v26.i40.6207] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 08/09/2020] [Accepted: 09/25/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Identifying genetic mutations in cancer patients have been increasingly important because distinctive mutational patterns can be very informative to determine the optimal therapeutic strategy. Recent studies have shown that deep learning-based molecular cancer subtyping can be performed directly from the standard hematoxylin and eosin (H&E) sections in diverse tumors including colorectal cancers (CRCs). Since H&E-stained tissue slides are ubiquitously available, mutation prediction with the pathology images from cancers can be a time- and cost-effective complementary method for personalized treatment. AIM To predict the frequently occurring actionable mutations from the H&E-stained CRC whole-slide images (WSIs) with deep learning-based classifiers. METHODS A total of 629 CRC patients from The Cancer Genome Atlas (TCGA-COAD and TCGA-READ) and 142 CRC patients from Seoul St. Mary Hospital (SMH) were included. Based on the mutation frequency in TCGA and SMH datasets, we chose APC, KRAS, PIK3CA, SMAD4, and TP53 genes for the study. The classifiers were trained with 360 × 360 pixel patches of tissue images. The receiver operating characteristic (ROC) curves and area under the curves (AUCs) for all the classifiers were presented. RESULTS The AUCs for ROC curves ranged from 0.693 to 0.809 for the TCGA frozen WSIs and from 0.645 to 0.783 for the TCGA formalin-fixed paraffin-embedded WSIs. The prediction performance can be enhanced with the expansion of datasets. When the classifiers were trained with both TCGA and SMH data, the prediction performance was improved. CONCLUSION APC, KRAS, PIK3CA, SMAD4, and TP53 mutations can be predicted from H&E pathology images using deep learning-based classifiers, demonstrating the potential for deep learning-based mutation prediction in the CRC tissue slides.
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EL-Andari R, Bozso S, Kang J, Freed D, Nagendran J, Moon M, Nagendran J. QUANTIFYING THE IMMUNE RESPONSE TO TISSUE ENGINEERED PORCINE EXTRACELLULAR MATRIX. Can J Cardiol 2020. [DOI: 10.1016/j.cjca.2020.07.198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Jiang LL, Zhang FP, He YF, Fan WG, Zheng MM, Kang J, Huang F, He HW. Melatonin regulates mitochondrial function and biogenesis during rat dental papilla cell differentiation. EUROPEAN REVIEW FOR MEDICAL AND PHARMACOLOGICAL SCIENCES 2020; 23:5967-5979. [PMID: 31298348 DOI: 10.26355/eurrev_201907_18343] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE The aim of this study was to investigate the effect of melatonin on mitochondria of dental papilla cells (DPCs) during the odontogenic differentiation process. MATERIALS AND METHODS Primary DPCs were obtained from the first molar dental papilla of neonatal rats and cultured in osteogenic (OS) or basal medium supplemented with melatonin at different concentrations (0, 1 pM, 0.1 nM, 10 nM, and 1 μM) for differentiation in vitro. Effects of melatonin on differentiation, mitochondrial respiratory function, and mitochondrial biogenesis of DPCs were analyzed. RESULTS Upon odontogenic induction, Alkaline phosphatase (ALP) activity, dentin sialophosphoprotein (DSPP), and dentin matrix protein (DMP1) expression were significantly enhanced, with a peaked expression at 10 nM of melatonin treatment. During DPCs differentiation, 10 nM melatonin could significantly induce the increase of intracellular Adenosine triphosphate (ATP), the decrease of the oxidized form of nicotinamide adenine dinucleotide (NAD+)/NADH ratio and reactive oxygen species (ROS). The mRNA and protein levels of peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC-1α), nuclear respiratory factor 1 (NRF-1), and mitochondrial transcription factor A (TFAM) were significantly increased, and the peak level of expression was found in cells treated with 10 nM of melatonin. Furthermore, the mitochondria DNA (mtDNA) copy number was significantly decreased during DPCs differentiation. CONCLUSIONS These findings suggest that melatonin can promote the differentiation of rat DPCs and regulate mitochondrial energy metabolism, ROS scavenging, and mitochondrial biogenesis.
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Kim BS, Kang J, Jun S, Kim H, Pak K, Kim GH, Heo HJ, Kim YH. Association between immunotherapy biomarkers and glucose metabolism from F-18 FDG PET. EUROPEAN REVIEW FOR MEDICAL AND PHARMACOLOGICAL SCIENCES 2020; 24:8288-8295. [PMID: 32894535 DOI: 10.26355/eurrev_202008_22625] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE To assess associations between parameters derived from F-18 fluorodeoxyglucose (FDG) positron emission tomography (PET) and mRNA expression levels of immune checkpoint biomarkers such as programmed death receptor 1 (PD-1), programmed death-ligand 1 (PD-L1), cytotoxic T-lymphocyte antigen 4 (CTLA-4) as well as tumor mutation burden (TMB) in non-small cell lung cancer (NSCLC) patients. PATIENTS AND METHODS Integrated data were downloaded from Genomic Data Common Data Portal. Clinical, mRNA-seq, and whole exome-seq data of lung adenocarcinoma and squamous cell carcinoma from The Cancer Genome Atlas (TCGA) database were analyzed. TMB was defined as the total number of somatic missense mutations per megabase of the genome examined. Expression levels of PD-1, PD-L1, CTLA4 mRNA and TMB were collected. Correlations between imaging parameters of glucose metabolism and the expression levels of genomic biomarkers from cancers were evaluated. Bonferroni correction (adjusted p<0.0027) was applied to reduce type 1 error. RESULTS Of 31 NSCLC cases, 11 cases were adenocarcinoma (LUAD) and 20 were squamous cell carcinoma (LUSC). In linear regression analysis, texture parameters such as low gray-level run emphasis (LGRE, R2=0.48, p<0.0001), short run low gray-level emphasis (SRLGE, R2=0.45, p<0.0001) and long run low gray-level emphasis (LRLGE, R2=0.41, p=0.0001) derived from gray-level run length matrix (GLRLM) showed remarkable correlation with PD-L1 mRNA expression. Expression of PD-1, CTLA-4, and TMB failed to show any significant correlation with parameters of the F-18 FDG PET/CT. CONCLUSIONS Texture parameters derived from PET, known to indicate glucose uptake distribution, were correlated with expression of PD-L1 mRNA but not with expression of PD-1, CTLA-4 and TMB. Thus, tumoral heterogeneity could be a surrogate marker for the identification of PD-L1 level in NSCLC.
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de Bono J, Mateo J, Fizazi K, Saad F, Shore N, Sandhu S, Chi K, Sartor O, Agarwal N, Olmos D, Thiery-Vuillemin A, Twardowski P, Roubaud G, Ozguroglu M, Kang J, Burgents J, Gresty C, Corcoran C, Adelman C, Hussain M. 610O Final overall survival (OS) analysis of PROfound: Olaparib vs physician’s choice of enzalutamide or abiraterone in patients (pts) with metastatic castration-resistant prostate cancer (mCRPC) and homologous recombination repair (HRR) gene alterations. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.870] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Kim E, Kim H, Kang J, Crawford B. PCN108 Economic Burden in Patients with Prostate Cancer: Using HIRA NPS-2016 Database. Value Health Reg Issues 2020. [DOI: 10.1016/j.vhri.2020.07.158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Kim E, Kim H, Kang J, Crawford B. PCN30 Comparison of Health Status Utilities of Breast Cancer with Comorbidities from the Korean National Health and Nutrition Examination Survey (KNHANES) 2008-2018. Value Health Reg Issues 2020. [DOI: 10.1016/j.vhri.2020.07.080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Liu Y, Peng J, Kang J, Iliyasu AM, Niyato D, El-Latif AAA. A Secure Federated Learning Framework for 5G Networks. IEEE WIRELESS COMMUNICATIONS 2020; 27:24-31. [DOI: 10.1109/mwc.01.1900525] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Park E, Jeon Y, Kang J, Baik S. P-101 Oncologic outcomes of mitomycin-C induced severe neutropenia after hyperthermic intraperitoneal chemotherapy with cytoreductive surgery in colorectal cancer patients. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.04.183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Hong HG, Chen X, Kang J, Li Y. The Lq- NORM LEARNING FOR ULTRAHIGH-DIMENSIONAL SURVIVAL DATA: AN INTEGRATIVE FRAMEWORK. Stat Sin 2020; 30:1213-1233. [PMID: 32742137 PMCID: PMC7394456 DOI: 10.5705/ss.202017.0537] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
In the era of precision medicine, survival outcome data with high-throughput predictors are routinely collected. Models with an exceedingly large number of covariates are either infeasible to fit or likely to incur low predictability because of overfitting. Variable screening is key in identifying and removing irrelevant attributes. Recent years have seen a surge in screening methods, but most of them rely on some particular modeling assumptions. Motivated by a study on detecting gene signatures for multiple myeloma patients' survival, we propose a model-free L q -norm learning procedure, which includes the well-known Cramér-von Mises and Kolmogorov criteria as two special cases. The work provides an integrative framework for detecting predictors with various levels of impact, such as short- or long-term impact, on censored outcome data. The framework naturally leads to a scheme which combines results from different q to reduce false negatives, an aspect often overlooked by the current literature. We show that our method possesses sure screening properties. The utility of the proposal is confirmed with simulation studies and an analysis of the multiple myeloma study.
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