4.7 Article

Persistent aberrations in circulating DNA integrity after radiotherapy are associated with poor prognosis in nasopharyngeal carcinoma patients

期刊

CLINICAL CANCER RESEARCH
卷 14, 期 13, 页码 4141-4145

出版社

AMER ASSOC CANCER RESEARCH
DOI: 10.1158/1078-0432.CCR-08-0182

关键词

-

类别

向作者/读者索取更多资源

Purpose: Aberrations of circulating nucleic acid integrity have been observed in cancer patients. However, the clinical significance of such changes has not been completely elucidated. In this study, we investigated the plasma DNA integrity in nasopharyngeal carcinoma (NPC) patients and its association with patients' survival after radiotherapy. Experimental Design: Plasma DNA integrity was analyzed for 105 NPC patients before and after curative-intent radiotherapy and for 40 healthy controls. The plasma DNA concentration of each sample was measured by two real-time PCRs targeting the leptin gene. The amplicon sizes of the two assays were 105 and 201 bp. The integrity index was calculated as the ratio of the two concentrations (201 bp/105 bp). More intact circulating DNA would give a higher integrity index. Results: The plasma DNA integrity index of the NPC patients was significantly higher than that of the healthy controls (median, 0.356 versus 0.238; P < 0.001). After radiotherapy, a reduction in plasma DNA integrity index was observed in 70% NPC patients. Patients with persistent aberrations of plasma DNA integrity had significantly poorer survival probability than those with reduced DNA integrity after treatment (P < 0.001, Kaplan-Meier). Conclusions: NPC is associated with disturbances in the integrity of circulating cell-free DNA. The persistence of DNA integrity aberrations after radiotherapy is associated with reduced probability of disease-free survival. Therefore, the measurement of plasma DNA integrity may serve as a useful marker for the detection and monitoring of malignant diseases.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

Article Oncology

Identifying optimal clinical trial candidates for locoregionally advanced nasopharyngeal carcinoma: Analysis of 9468 real-world cases and validation by two phase 3 multicentre, randomised controlled trial

Si-Qi Tang, Lei Chen, Wen-Fei Li, Anthony T. C. Chan, Shao Hui Huang, Melvin L. K. Chua, Brian O'Sullivan, Anne W. M. Lee, Nancy Y. Lee, Yuan Zhang, Yu-Pei Chen, Cheng Xu, Ying Sun, Ling-Long Tang, Jun Ma

Summary: By analyzing data from non-metastatic NPC patients, N2-3 or T4 patients were identified as ideal candidates for multicenter clinical trials in locoregionally advanced NPC. Stratification based on pre-treatment EBV DNA can identify high-risk patients, while detectable post-treatment EBV DNA indicates a high risk of progression.

RADIOTHERAPY AND ONCOLOGY (2022)

Article Oncology

Exploratory Study of NPC-0501 Trial: Optimal Cisplatin Dose of Concurrent and Induction/Adjuvant Chemotherapy for Locoregionally Advanced Nasopharyngeal Carcinoma

Wai-Tong Ng, Cheuk-Wai Choi, Barton But, Roger K. C. Ngan, Stewart Tung, Ashley C. Cheng, Dora L. W. Kwong, Tai-Xiang Lu, Anthony T. C. Chan, Harry Yiu, Sarah Lee, Frank Wong, Kam-Tong Yuen, Richard J. Chappell, Anne W. M. Lee

Summary: The combination of cisplatin-based induction or adjuvant chemotherapy with concurrent chemoradiotherapy has been found to improve overall survival in patients with locoregionally advanced nasopharyngeal carcinoma. The optimal platinum doses for the concurrent and induction/adjuvant phases were determined to be 160 mg/m(2) and 260 mg/m(2) respectively.

CLINICAL CANCER RESEARCH (2022)

Article Radiology, Nuclear Medicine & Medical Imaging

The effect of material assignment in nasal cavity on dose calculation for nasopharyngeal carcinoma (NPC) using Acuros XB

Michael L. M. Cheung, Vivian U. Y. Chow, Monica W. K. Kan, Anthony T. C. Chan

Summary: This study evaluated the impact of material assignment in the nasal cavity on dose calculation for nasopharyngeal carcinoma treatment using the Acuros XB algorithm. The results showed that assigning the nasal cavity to the lung instead of air resulted in higher calculated doses. This could potentially lead to underdosing of the target volumes, highlighting the importance of accurate material assignment in dose calculation.

JOURNAL OF APPLIED CLINICAL MEDICAL PHYSICS (2022)

Article Medical Laboratory Technology

Comparison of Single Molecule, Real-Time Sequencing and Nanopore Sequencing for Analysis of the Size, End-Motif, and Tissue-of-Origin of Long Cell-Free DNA in Plasma

Stephanie C. Y. Yu, Jiaen Deng, Rong Qiao, Suk Hang Cheng, Wenlei Peng, So Ling Lau, L. Y. Lois Choy, Tak Y. Leung, John Wong, Vincent Wai-Sun Wong, Grace L. H. Wong, Peiyong Jiang, Rossa W. K. Chiu, K. C. Allen Chan, Y. M. Dennis Lo

Summary: Recent studies have highlighted the presence of a substantial amount of analyzable long cell-free DNA (cfDNA) in plasma through single molecule, real-time (SMRT) sequencing. In this study, the size biases of SMRT sequencing by PacBio and nanopore sequencing by ONT were evaluated. The results showed that both platforms had biases towards sequencing longer DNA fragments, with PacBio showing a stronger bias. Tissue-of-origin analysis based on single-molecule methylation patterns performed comparably on both platforms. It is important to be aware of the analytical characteristics and biases of the sequencing platforms used when analyzing the size and end motif of cfDNA.

CLINICAL CHEMISTRY (2023)

Article Radiology, Nuclear Medicine & Medical Imaging

Magnetic-field-modulated radiotherapy (MagMRT) in inhomogeneous medium and its potential applications

Vivien W. S. Chu, Monica W. K. Kan, Louis K. Y. Lee, Kenneth C. W. Wong, Anthony T. C. Chan

Summary: The study investigated the effects of magnetic field gradients on dose deposition in an inhomogeneous medium and demonstrated the benefits of magnetic-field-modulated radiotherapy (MagMRT) under multiple radiation beams. Monte Carlo simulations showed that the magnitudes of dose enhancement and reduction induced by the magnetic field gradients were more prominent in lower density mediums. MagMRT induced dose enhancement at the iso-center and dose reduction in regions around the tumor when multiple radiation beams were used. Optimized magnetic field gradients in MagMRT resulted in a sharper dose fall-off in all directions outside the target volume, providing a better sparing to the surrounding normal tissue.

BIOMEDICAL PHYSICS & ENGINEERING EXPRESS (2022)

Article Oncology

Pembrolizumab monotherapy versus chemotherapy in platinum-pretreated, recurrent or metastatic nasopharyngeal cancer (KEYNOTE-122): an open-label, randomized, phase III trial

A. T. C. Chan, V. H. F. Lee, R-L Hong, M. -J. Ahn, W. Q. Chong, S. -B. Kim, G. F. Ho, P. B. Caguioa, N. Ngamphaiboon, C. Ho, M. A. S. A. Aziz, Q. S. Ng, C. -J. Yen, N. Soparattanapaisarn, R. K. -C Ngan, S. K. Kho, M. L. A. Tiambeng, T. Yun, V. Sriuranpong, A. P. Algazi, A. Cheng, E. Massarelli, R. F. Swaby, S. Saraf, J. Yuan, L. L. Siu

Summary: Pembrolizumab showed robust antitumor activity and manageable safety in patients with platinum-pretreated recurrent and/or metastatic nasopharyngeal carcinoma. However, it did not significantly improve overall survival compared with chemotherapy.

ANNALS OF ONCOLOGY (2023)

Article Oncology

Recommendations for Epstein-Barr virus-based screening for nasopharyngeal cancer in high- and intermediate-risk regions

W. K. Jacky Lam, Ann D. King, Jacob A. Miller, Zhiwei Liu, Kelly J. Yu, Melvin L. K. Chua, Brigette B. Y. Ma, Ming Yuan Chen, Benjamin A. Pinsky, Pei-Jen Lou, John K. S. Woo, Wan-Lun Hsu, Julia Simon, Denise L. Doolan, Tim Waterboer, Edwin P. Hui, Hui Li, Raymond K. Tsang, Kenneth C. W. Wong, Julian P. Goh, Alexander C. Vlantis, Qi Yong Ai, Lun M. Wong, Victor Abdullah, Jin Ching Lin, Chien-Jen Chen, Ruth M. Pfeiffer, Quynh-Thu Le, Anne W. M. Lee, Mingfang Ji, Sumei Cao, Jun Ma, Anthony T. C. Chan, K. C. Allen Chan, Allan Hildesheim

Summary: A meeting of experts in November 2021 discussed the performance and cost-effectiveness of EBV-based approaches for screening early stage nasopharyngeal carcinoma. Both serum EBV antibody and plasma EBV DNA testing methods were found to be favorable. Additionally, the use of MRI was recommended to increase the sensitivity of NPC detection without greatly impacting the cost-effectiveness of the screening program.

JNCI-JOURNAL OF THE NATIONAL CANCER INSTITUTE (2023)

Article Biochemistry & Molecular Biology

A novel tumor suppressor encoded by a 1p36.3 lncRNA functions as a phosphoinositide-binding protein repressing AKT phosphorylation/activation and promoting autophagy

Lili Li, Xing-sheng Shu, Hua Geng, Jianming Ying, Lei Guo, Jie Luo, Tingxiu Xiang, Longtao Wu, Brigette B. Y. Ma, Anthony T. C. Chan, Xiaofeng Zhu, Richard F. Ambinder, Qian Tao

Summary: Peptides/small proteins encoded by noncanonical open reading frames (ORF) of previously claimed non-coding RNAs have important biological functions but are largely uncharacterized. In this study, we identified and validated a small protein SP0495 as a novel tumor suppressor, frequently inactivated by promoter methylation in multiple tumors. SP0495 functions as a phosphoinositide-binding protein, regulating AKT signaling activation and autophagy. It inhibits tumor cell growth and induces apoptosis, cell cycle arrest, senescence, and autophagy through multiple mechanisms, including the modulation of phosphoinositides turnover and autophagic/proteasomal degradation of autophagy regulators. SP0495 has the potential to be a biomarker for cancer diagnosis and prognosis.

CELL DEATH AND DIFFERENTIATION (2023)

Article Multidisciplinary Sciences

Fragmentation landscape of cell-free DNA revealed by deconvolutional analysis of end motifs

Ze Zhou, Mary-Jane L. Ma, Rebecca W. Y. Chan, W. K. Jacky Lam, Wenlei Peng, Wanxia Gai, Xi Hu, Spencer C. Ding, Lu Ji, Qing Zhou, Peter P. H. Cheung, Stephanie C. Y. Yu, Jeremy Y. C. Teoh, Cheuk-Chun Szeto, John Wong, Vincent W. S. Wong, Grace L. H. Wong, Stephen L. Chan, Edwin P. Hui, Brigette B. Y. Ma, Anthony T. C. Chan, Rossa W. K. Chiu, K. C. Allen Chan, Y. M. Dennis Lo, Peiyong Jiang

Summary: Using a non-negative matrix factorization algorithm, this study identified distinct types of cfDNA cleavage patterns based on different end motifs. These profiles were associated with specific DNA nucleases and could be used to diagnose autoimmune disorders and cancer.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2023)

Article Oncology

Frequency of Peripheral CD8+T Cells Expressing Chemo-Attractant Receptors CCR1, 4 and 5 Increases in NPC Patients with EBV Clearance upon Radiotherapy

Shweta Mahajan, Hayri E. Balcioglu, Astrid Oostvogels, Willem A. Dik, K. C. Allen Chan, Kwok-Wai Lo, Edwin P. Hui, Anna Tsang, Joanna Tong, Wai Kei Jacky Lam, Kenneth Wong, Anthony T. C. Chan, Brigette B. Y. Ma, Reno Debets

Summary: Post-radiotherapy clearance of plasma EBV DNA is associated with prognosis in NPC patients. T cells, particularly CD8+ T cells expressing CCR1, 4 and/or 5, play a role in this clearance process. Differences in chemo-attractants related to T-cell chemotaxis are also linked to clinical outcome. Validation in larger cohorts is needed to confirm these findings.

CANCERS (2023)

Article Medicine, General & Internal

Long-term Outcomes of Bevacizumab and Chemoradiation for Locoregionally Advanced Nasopharyngeal Carcinoma: A Nonrandomized Controlled Trial

Nancy Y. Lee, Jonathan Harris, John Kim, Adam Garden, James Mechalakos, David G. Pfister, Anthony T. C. Chan, Kenneth Hu, A. Dimitrios Colevas, Steven Frank, George Shenouda, Voichita Bar-Ad, John N. Waldron, Paul M. Harari, Adam Raben, Pedro Torres-Saavedra, Quynh-Thu Le

Summary: The study aimed to assess the long-term toxic effects and clinical outcomes associated with adding bevacizumab, a vascular endothelial growth factor inhibitor, to standard chemoradiation for patients with nasopharyngeal carcinoma (NPC). The results showed favorable long-term outcomes and no severe adverse events when using bevacizumab in combination with chemoradiation. Further investigation may be warranted.

JAMA NETWORK OPEN (2023)

Article Genetics & Heredity

'Longing' for the Next Generation of Liquid Biopsy: The Diagnostic Potential of Long Cell-Free DNA in Oncology and Prenatal Testing

Stephanie C. Y. Yu, L. Y. Lois Choy, Y. M. Dennis Lo

Summary: Liquid biopsy using cell-free DNA (cfDNA) has gained global interest as a molecular diagnostic tool. Recent studies have discovered long cfDNA in the plasma of pregnant women and cancer patients, opening up a new avenue of long cfDNA-based liquid biopsy. This review summarizes the current knowledge in this nascent field of long cfDNA analysis, focusing on its fragmentomic and epigenetic features. Long-read sequencing enables single-molecule methylation analysis, which has promising clinical potential in prenatal and cancer testing. The limitations hindering the immediate clinical applications of long cfDNA analysis and the efforts to address them are also discussed. With concerted efforts, long cfDNA analysis is expected to contribute to the expanding armamentarium of liquid biopsy.

MOLECULAR DIAGNOSIS & THERAPY (2023)

Article Oncology

Nasopharyngeal cancer screening with an anti-BNLF2b antibody: a new arrow in the quiver?

W. K. Jacky Lam, Anthony T. C. Chan

Summary: A recent study has identified a new serological biomarker for NPC screening that targets the EBV protein BNLF2b. This biomarker demonstrated higher sensitivity and specificity for NPC detection compared with conventional antibodies.

NATURE REVIEWS CLINICAL ONCOLOGY (2023)

Article Oncology

Role of chemotherapy in patients with nasopharynx carcinoma treated with radiotherapy (MAC-NPC): an updated individual patient data network meta-analysis

Claire Petit, Anne Lee, Jun Ma, Benjamin Lacas, Wai Tong Ng, Anthony T. C. Chan, Ruey-Long Hong, Ming-Yuan Chen, Lei Chen, Wen-Fei Li, Pei-Yu Huang, Terence Tan, Roger K. C. Ngan, Guopei Zhu, Hai-Qiang Mai, Edwin P. Hui, George Fountzilas, Li Zhang, Alexandra Carmel, Dora L. W. Kwong, James Moon, Jean Bourhis, Anne Auperin, Jean-Pierre Pignon, Pierre Blanchard

Summary: This study updated the evaluation of chemotherapy for nasopharynx carcinoma through a network meta-analysis. The results showed that the addition of induction chemotherapy or adjuvant chemotherapy to chemoradiotherapy improved overall survival for patients with non-metastatic nasopharyngeal carcinoma compared to chemoradiotherapy alone.

LANCET ONCOLOGY (2023)

暂无数据