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Chen SW, Wang P, Ji GY, Jiang Q, Hong XM, Ma WJ, Huang R, Chen ZH, Peng JW. Sex Difference in the Association Between Eating Away From Home and the Risk of High Serum Uric Acid in South China. Front Nutr 2021; 8:647287. [PMID: 34733871 PMCID: PMC8558310 DOI: 10.3389/fnut.2021.647287] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Accepted: 09/16/2021] [Indexed: 11/13/2022] Open
Abstract
Background: The prevalence of high serum uric acid is increasingly rising in recent years, and diet behavior is perceived to be associated with it. This study aimed to explore the relationship between eating away from home (EAFH) and the risk of high serum uric acid in adults in South China. Methods: The data utilized in this study were from Guangdong Nutrition and Health Survey (NHS) 2015. Serum uric acid concentration was detected. EAFH in the past week was investigated. We defined EAFH as food consumption away from home. Dietary data were collected by 24-h recalls on 3 consecutive days. A generalized linear mixed-effects model was applied to compute the odds ratio (OR) and its corresponding 95% CI. Results: A total of 3,489 individuals were included in this study. A 1.27-fold OR (95% CI: 1.05–1.52, P = 0.012) of high serum uric acid was identified in adults with EAFH in comparison with those without EAFH. With respect to men, a 1.66-fold OR (95% CI: 1.3–2.1, P < 0.001) of high serum uric acid was observed. We also observed that men with EAFH had higher intakes of red meat, poultry, vegetable, carbohydrate, protein, fat, and total energy, while a lower grain intake than those without EAFH. However, there was a lack of significant association between EAFH and the odds ratio of high serum uric acid in women. Women with EAFH did not have higher consumptions of red meat, vegetable, fish, fat, and water than those without EAFH. Conclusions: This study found that EAFH was associated with an increased odds ratio of high serum uric acid in men, but not in women.
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Affiliation(s)
- Shao-Wei Chen
- Guangdong Provincial Center for Disease Control and Prevention, Guangdong Provincial Institute of Public Health, Guangzhou, China
| | - Ping Wang
- Guangdong Provincial Center for Disease Control and Prevention, Guangdong Provincial Institute of Public Health, Guangzhou, China
| | - Gui-Yuan Ji
- Guangdong Provincial Center for Disease Control and Prevention, Guangdong Provincial Institute of Public Health, Guangzhou, China
| | - Qi Jiang
- Guangdong Provincial Center for Disease Control and Prevention, Guangdong Provincial Institute of Public Health, Guangzhou, China
| | - Xiao-Min Hong
- Guangdong Provincial Center for Disease Control and Prevention, Guangdong Provincial Institute of Public Health, Guangzhou, China
| | - Wen-Jun Ma
- Guangdong Provincial Center for Disease Control and Prevention, Guangdong Provincial Institute of Public Health, Guangzhou, China
| | - Rui Huang
- Guangdong Provincial Center for Disease Control and Prevention, Guangdong Provincial Institute of Public Health, Guangzhou, China
| | - Zi-Hui Chen
- Guangdong Provincial Center for Disease Control and Prevention, Guangdong Provincial Institute of Public Health, Guangzhou, China
| | - Jie-Wen Peng
- Guangdong Provincial Center for Disease Control and Prevention, Guangdong Provincial Institute of Public Health, Guangzhou, China
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Tang WF, Xu W, Huang WZ, Lin GN, Zeng YM, Lin JS, Wu M, Bao H, Peng JW, Jiang HM, Wang HQ, Wu YM, Ye HY, Liang Y. Pathologic complete response after neoadjuvant tislelizumab and chemotherapy for Pancoast tumor: A case report. Thorac Cancer 2021; 12:1256-1259. [PMID: 33656285 PMCID: PMC8046127 DOI: 10.1111/1759-7714.13910] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 12/29/2020] [Revised: 02/09/2021] [Accepted: 02/09/2021] [Indexed: 12/12/2022] Open
Abstract
A 60‐year‐old man was hospitalized because of numbness and weakness in the right upper limb. Magnetic resonance imaging revealed a large mass in the right upper lobe invading the right eighth cervical and first thoracic nerve root. Biopsy pathology confirmed primary lung adenocarcinoma with a clinical stage of cT4N0M0 IIIA, negative for anaplastic lymphoma kinase fusion gene and epidermal growth factor receptor mutations but positive for programmed death ligand 1 (3%). Neoadjuvant tislelizumab and chemotherapy were offered to this patient with Pancoast tumor, and tumor shrinkage of 71% was achieved. After the operation, surgical pathology indicated pathologic complete response (pCR). Circulating tumor cells testing was negative after the first adjuvant treatment. In this case, we provide real‐world evidence of encouraging pCR with neoadjuvant tislelizumab and chemotherapy for a patient with Pancoast tumor.
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Affiliation(s)
- Wen-Fang Tang
- Department of Cardiothoracic Surgery, Zhongshan People's Hospital, Zhongshan, China
| | - Wei Xu
- Department of Cardiothoracic Surgery, Zhongshan People's Hospital, Zhongshan, China
| | - Wei-Zhao Huang
- Department of Cardiothoracic Surgery, Zhongshan People's Hospital, Zhongshan, China
| | - Gui-Nan Lin
- Department of Oncology, Zhongshan People's Hospital, Zhongshan, China
| | - Yu-Mei Zeng
- Department of Pathology, Zhongshan People's Hospital, Zhongshan, China
| | - Jie-Shan Lin
- Department of Nephrology, Blood Purifiction Center, Zhongshan People's Hospital, Zhongshan, China
| | - Min Wu
- Nanjing Geneseeq Technology Inc., Nanjing, China
| | - Hua Bao
- Nanjing Geneseeq Technology Inc., Nanjing, China
| | - Jie-Wen Peng
- Department of Oncology, Zhongshan People's Hospital, Zhongshan, China
| | - Hai-Ming Jiang
- Department of Cardiothoracic Surgery, Zhongshan People's Hospital, Zhongshan, China
| | - Heng-Qiang Wang
- Department of Cardiothoracic Surgery, Zhongshan People's Hospital, Zhongshan, China
| | - Ying-Meng Wu
- Department of Cardiothoracic Surgery, Zhongshan People's Hospital, Zhongshan, China
| | - Hong-Yu Ye
- Department of Cardiothoracic Surgery, Zhongshan People's Hospital, Zhongshan, China
| | - Yi Liang
- Department of Cardiothoracic Surgery, Zhongshan People's Hospital, Zhongshan, China
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Chen SW, Ji GY, Jiang Q, Wang P, Huang R, Ma WJ, Chen ZH, Peng JW. Correction to: Association between dietary acid load and the risk of hypertension among adults from South China: result from nutrition and health survey (2015-2017). BMC Public Health 2020; 20:360. [PMID: 32192486 PMCID: PMC7081685 DOI: 10.1186/s12889-020-08502-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Shao-Wei Chen
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, No. 160 Qunxian Road, Panyu District, Guangzhou, 511430, China
| | - Gui-Yuan Ji
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, No. 160 Qunxian Road, Panyu District, Guangzhou, 511430, China
| | - Qi Jiang
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, No. 160 Qunxian Road, Panyu District, Guangzhou, 511430, China
| | - Ping Wang
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, No. 160 Qunxian Road, Panyu District, Guangzhou, 511430, China
| | - Rui Huang
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, No. 160 Qunxian Road, Panyu District, Guangzhou, 511430, China
| | - Wen-Jun Ma
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, No. 160 Qunxian Road, Panyu District, Guangzhou, 511430, China
| | - Zi-Hui Chen
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, No. 160 Qunxian Road, Panyu District, Guangzhou, 511430, China.
| | - Jie-Wen Peng
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, No. 160 Qunxian Road, Panyu District, Guangzhou, 511430, China.
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Chen SW, Ji GY, Jiang Q, Wang P, Huang R, Ma WJ, Chen ZH, Peng JW. Association between dietary acid load and the risk of hypertension among adults from South China: result from nutrition and health survey (2015-2017). BMC Public Health 2019; 19:1599. [PMID: 31783746 PMCID: PMC6884827 DOI: 10.1186/s12889-019-7985-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 08/30/2019] [Accepted: 11/21/2019] [Indexed: 12/24/2022] Open
Abstract
Background Higher dietary acid load (DAL) was considered to be associated with an elevated risk of hypertension, while related data from mainland China remains scarce and incomplete. We aim to evaluate the association between DAL and the risk of hypertension among adults from South China. Methods We conducted a nutrition and health survey in Guangdong Province located in southern China from 2015 to 2017. A four-stage probability sampling method was utilized to select representative samples of citizens aged ≥18 years old. DAL was assessed by potential renal acid load (PRAL) and net endogenous acid production (NEAP). Participants were divided to 4 groups (Q1-Q4) according to the quartile points of PRAL or NEAP distributions. Generalized linear mixed effects models were applied to evaluate the association between DAL and the risk of hypertension. Results A total of 3501 individuals were eligible for this study and 45.9% was male participants. Hypertension rate was 30.7%. A higher PRAL was associated with higher prevalence rate of hypertension among the male (P-trend = 0.03). OR for Q2 was 1.34 (95%CI, 0.94–1.91), Q3 was 1.53 (95%CI = 1.08, 2.16) and Q4 was 1.51 (95%CI, 1.08–2.16) among the male. However, as for total participants, the female, the participants with ≤55 years or participants with > 55 years, the associations were lack of significance. With respect to association between NEAP and hypertension, non-significant results were identified. Conclusions The current study indicated male hypertension was associated with higher PRAL, while given to this study was cross-sectional design, further studies are warranted to verify the association.
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Affiliation(s)
- Shao-Wei Chen
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, No. 160 Qunxian Road, Panyu District, Guangzhou, 511430, China
| | - Gui-Yuan Ji
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, No. 160 Qunxian Road, Panyu District, Guangzhou, 511430, China
| | - Qi Jiang
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, No. 160 Qunxian Road, Panyu District, Guangzhou, 511430, China
| | - Ping Wang
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, No. 160 Qunxian Road, Panyu District, Guangzhou, 511430, China
| | - Rui Huang
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, No. 160 Qunxian Road, Panyu District, Guangzhou, 511430, China
| | - Wen-Jun Ma
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, No. 160 Qunxian Road, Panyu District, Guangzhou, 511430, China
| | - Zi-Hui Chen
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, No. 160 Qunxian Road, Panyu District, Guangzhou, 511430, China.
| | - Jie-Wen Peng
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, No. 160 Qunxian Road, Panyu District, Guangzhou, 511430, China.
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Wang DS, Wang ZQ, Chen G, Peng JW, Wang W, Deng YH, Wang FH, Zhang JW, Liang HL, Feng F, Xie CB, Ren C, Jin Y, Shi SM, Fan WH, Lu ZH, Ding PR, Wang F, Xu RH, Li YH. Phase III randomized, placebo-controlled, double-blind study of monosialotetrahexosylganglioside for the prevention of oxaliplatin-induced peripheral neurotoxicity in stage II/III colorectal cancer. Cancer Med 2019; 9:151-159. [PMID: 31724334 PMCID: PMC6943144 DOI: 10.1002/cam4.2693] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [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: 07/12/2019] [Revised: 10/04/2019] [Accepted: 10/24/2019] [Indexed: 01/04/2023] Open
Abstract
Background Monosialotetrahexosylganglioside (GM1) is a neuroprotective glycosphingolipid that repairs nerves. Oxaliplatin‐based chemotherapy is neurotoxic. This study assessed the efficacy of GM1 for preventing oxaliplatin‐induced peripheral neurotoxicity (OIPN) in colorectal cancer (CRC) patients receiving oxaliplatin‐based chemotherapy. Methods In total, 196 patients with stage II/III CRC undergoing adjuvant chemotherapy with mFOLFOX6 were randomly assigned to intravenous GM1 or a placebo. The primary endpoint was the rate of grade 2 or worse cumulative neurotoxicity (NCI‐CTCAE). The secondary endpoints were chronic cumulative neurotoxicity (EORTCQLQ‐CIPN20), time to grade 2 neurotoxicity (NCI‐CTCAE or the oxaliplatin‐specific neuropathy scale), acute neurotoxicity (analog scale), rates of dose reduction or withdrawal due to OIPN, 3‐year disease‐free survival (DFS) and adverse events. Results There were no significant differences between the arms in the rate of NCI‐CTCAE grade 2 or worse neurotoxicity (GM1: 33.7% vs placebo: 31.6%; P = .76) or neuropathy measured by the EORTCQLQ‐CIPN20 or time to grade 2 neurotoxicity using NCI‐CTCAE and the oxaliplatin‐specific neuropathy scale. GM1 substantially decreased participant‐reported acute neurotoxicity (sensitivity to cold items [P < .01], discomfort swallowing cold liquids [P < .01], throat discomfort [P < .01], muscle cramps [P < .01]). The rates of dose reduction or withdrawal were not significantly different between the arms (P = .08). The 3‐year DFS rates were 85% and 83% in the GM1 and placebo arms, respectively (P = .19). There were no differences in toxicity between the arms. Conclusion Patients receiving GM1 were less troubled by the symptoms of acute neuropathy. However, we do not support the use of GM1 to prevent cumulative neurotoxicity. (http://ClinicalTrials.gov number, NCT02251977).
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Affiliation(s)
- De-Shen Wang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Department of Medical Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Zhi-Qiang Wang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Department of Medical Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Gong Chen
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Department of Colorectal Surgery, Sun Yat-sen University Cancer Center, Guangzhou, China
| | | | - Wei Wang
- The First People's Hospital of Foshan City, Foshan, China
| | - Yan-Hong Deng
- The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Feng-Hua Wang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Department of Medical Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Jian-Wei Zhang
- The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | | | - Fen Feng
- The First People's Hospital of Foshan City, Foshan, China
| | - Chuan-Bo Xie
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Department of Cancer Prevention Research, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Chao Ren
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Department of Medical Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Ying Jin
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Department of Medical Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Si-Mei Shi
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Department of Medical Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Wen-Hua Fan
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Department of Colorectal Surgery, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Zhen-Hai Lu
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Department of Colorectal Surgery, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Pei-Rong Ding
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Department of Colorectal Surgery, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Feng Wang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Department of Medical Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Rui-Hua Xu
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Department of Medical Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Yu-Hong Li
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Department of Medical Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China
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Wang P, Chen SW, Chen ZH, Huo WL, Huang R, Huang WX, Peng JW, Yang XF. Benefit-risk assessment of commonly consumed fish species from South China Sea based on methyl mercury and DHA. Environ Geochem Health 2019; 41:2055-2066. [PMID: 30806845 DOI: 10.1007/s10653-019-00254-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [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: 04/16/2018] [Accepted: 01/29/2019] [Indexed: 06/09/2023]
Abstract
Even though a growing number of reports indicated favorable health effects with fish consumption, kinds of hazardous substances in fish were detected in fish and to be exceeded advisory limitation. Benefit-risk assessment of commonly consumed fish is urgently needed. We conducted fish consumption survey and fish sampling in the coast of South China Sea to assess benefit-risk effect of commonly consumed fish species. For local residents, weekly methyl mercury (MeHg) exposures from commonly consumed fish species ranged from 0.12 to 2.11 μg/kg bw. Apart from Muraenesox cinereus and Acanthopagrus latus, the rest of 92% (23/25) fish species were at low risk of MeHg exposure. Daily docosahexaenoic acid intakes via consuming specific fish were between 42.18 and 1687.04 mg/day. A total of 72% (18/25) fish species could provide 200 mg/day of DNA for local residents. Benefit-risk assessment assuming intelligence quotient (IQ) score model showed net IQ point gains between 1.53 and 5.65 points with consuming various fish species, indicative of large distinction of health benefit from various fish species. This study suggests commonly consumed fish species from China South Sea could bring much more positive effect than negative effect. Species-specific fish should be considered when providing recommendations of fish consumption. Muraenesox cinereus and Acanthopagrus latus should be minded with risk of MeHg exposure in taking large amounts.
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Affiliation(s)
- Ping Wang
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, No. 160 Qunxian Road, Panyu District, Guangzhou, 511430, China
| | - Shao-Wei Chen
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, No. 160 Qunxian Road, Panyu District, Guangzhou, 511430, China
| | - Zi-Hui Chen
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, No. 160 Qunxian Road, Panyu District, Guangzhou, 511430, China
| | - Wei-Lun Huo
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, No. 160 Qunxian Road, Panyu District, Guangzhou, 511430, China
| | - Rui Huang
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, No. 160 Qunxian Road, Panyu District, Guangzhou, 511430, China
| | - Wei-Xiong Huang
- Guangdong Provincial Center for Disease Control and Prevention, No. 160 Qunxian Road, Panyu District, Guangzhou, 511430, China
| | - Jie-Wen Peng
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, No. 160 Qunxian Road, Panyu District, Guangzhou, 511430, China.
| | - Xing-Fen Yang
- Food Safety and Health Research Center, School of Public Health, Southern Medical University (Guangdong Provincial Key Laboratory of Tropical Disease Research), No. 1023, South Shatai Road, Baiyun District, Guangzhou, 510515, Guangdong, China.
- Guangdong Provincial Center for Disease Control and Prevention, No. 160 Qunxian Road, Panyu District, Guangzhou, 511430, China.
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Chen SW, Chen ZH, Liang YH, Wang P, Peng JW. Elevated hypertension risk associated with higher dietary acid load: A systematic review and meta-analysis. Clin Nutr ESPEN 2019; 33:171-177. [PMID: 31451256 DOI: 10.1016/j.clnesp.2019.05.020] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 05/06/2019] [Accepted: 05/23/2019] [Indexed: 01/15/2023]
Abstract
BACKGROUND & AIMS The association between dietary acid load and hypertension risk is inconclusive. We conducted a systematic review and meta-analysis to summarize effect of dietary acid load on blood pressure. METHODS A comprehensively search was performed in electronic databases including EMBASE, PubMed, Web of Science and Chinese National Knowledge Infrastructure. Summary ORs and their corresponding 95% CIs were computed assuming a randomized model or fixed model. RESULTS Ten publications comprising 4 cohort and 6 cross-sectional studies were eligible for meta-analysis. There were 8 studies about potential renal acid load (PRAL) and 4 about net endogenous acid production (NEAP). Essential hypertension was statistically associated with higher PRAL (OR = 1.14, 95% CI = 1.02-1.17). Our findings also demonstrated a positive impact of higher PRAL on elevating both diastolic pressure (WMD = 0.96, 95% CI = 0.67-1.26) and systolic pressure (WMD = 1.57, 95% CI = 1.12-2.03). A 35% increased risk of hypertension associated with higher NEAP was identified (OR = 1.35, 95% CI = 1.03-1.78). CONCLUSIONS The current study suggests that dietary acid load might be potential risk factor of hypertension.
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Affiliation(s)
- Shao-Wei Chen
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, China
| | - Zi-Hui Chen
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, China
| | | | - Ping Wang
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, China
| | - Jie-Wen Peng
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, China.
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Chen SW, Chen ZH, Wang P, Huang R, Huo WL, Huang WX, Yang XF, Peng JW. Health Risk Assessment for Local Residents from the South China Sea Based on Mercury Concentrations in Marine Fish. Bull Environ Contam Toxicol 2018; 101:398-402. [PMID: 29971607 DOI: 10.1007/s00128-018-2388-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 05/15/2018] [Accepted: 06/19/2018] [Indexed: 06/08/2023]
Abstract
The offshore area of the South China Sea is an important fishing ground in China. We used a food frequency questionnaire to determine marine fish consumption by local residents, and we detected mercury concentrations in commonly consumed marine fish species. In total, 127.9 g/day of the marine fish consumed was identified in 178 local residents. THg and MeHg concentrations in 209 samples of 22 fish species ranged from 11.3 to 215.0 µg/kg wt and 2.0 to 160.0 µg/kg wt, respectively. The mean MeHg exposure from marine fish to local residents was 0.099 µg/kg bw, accounting for 43.0% of the provisional tolerated weekly intake (PTWI) (1.6 µg/kg bw/week), suggesting a low health risk. However, a potentially high health risk (202.2% of PTWI) was identified in those with 97.5% MeHg exposure.
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Affiliation(s)
- Shao-Wei Chen
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, No. 160 Qunxian Road, Panyu District, Guangzhou, 511430, China
| | - Zi-Hui Chen
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, No. 160 Qunxian Road, Panyu District, Guangzhou, 511430, China
| | - Ping Wang
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, No. 160 Qunxian Road, Panyu District, Guangzhou, 511430, China
| | - Rui Huang
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, No. 160 Qunxian Road, Panyu District, Guangzhou, 511430, China
| | - Wei-Lun Huo
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, No. 160 Qunxian Road, Panyu District, Guangzhou, 511430, China
| | - Wei-Xiong Huang
- Guangdong Provincial Center for Disease Control and Prevention, No. 160 Qunxian Road, Panyu District, Guangzhou, 511430, China
| | - Xing-Fen Yang
- Southern Medical University, No.1023, South Shatai Road, Baiyun District, Guangzhou, 510515, Guangdong, China
| | - Jie-Wen Peng
- Department of Health Risk Assessment Research Center, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, No. 160 Qunxian Road, Panyu District, Guangzhou, 511430, China.
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Wu JQ, Song YP, Su LP, Zhang MZ, Li W, Hu Y, Zhang XH, Gao YH, Niu ZX, Feng R, Wang W, Peng JW, Li XL, Ouyang XN, Wu CP, Zhang WJ, Zeng Y, Xiao Z, Liang YM, Zhuang YZ, Wang JS, Sun ZM, Bai H, Cui TJ, Feng JF. Three-year Follow-up on the Safety and Effectiveness of Rituximab Plus Chemotherapy as First-Line Treatment of Diffuse Large B-Cell Lymphoma and Follicular Lymphoma in Real-World Clinical Settings in China: A Prospective, Multicenter, Noninterventional Study. Chin Med J (Engl) 2018; 131:1767-1775. [PMID: 30058572 PMCID: PMC6071449 DOI: 10.4103/0366-6999.237401] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Prospective real-life data on the safety and effectiveness of rituximab in Chinese patients with diffuse large B-cell lymphoma (DLBCL) or follicular lymphoma (FL) are limited. This real-world study aimed to evaluate long-term safety and effectiveness outcomes of rituximab plus chemotherapy (R-chemo) as first-line treatment in Chinese patients with DLBCL or FL. Hepatitis B virus (HBV) reactivation management was also investigated. METHODS A prospective, multicenter, single-arm, noninterventional study of previously untreated CD20-positive DLBCL or FL patients receiving first-line R-chemo treatment at 24 centers in China was conducted between January 17, 2011 and October 31, 2016. Enrolled patients underwent safety and effectiveness assessments after the last rituximab dose and were followed up for 3 years. Effectiveness endpoints included progression-free survival (PFS) and overall survival (OS). Safety endpoints were adverse events (AEs), serious AEs, drug-related AEs, and AEs of special interest. We also reported data on the incidence of HBV reactivation. RESULTS In total, 283 previously untreated CD20-positive DLBCL and 31 FL patients from 24 centers were enrolled. Three-year PFS was 59% (95% confidence interval [CI]: 50-67%) for DLBCL patients and 46% (95% CI: 20-69%) for FL patients. For DLBCL patients, multivariate analyses showed that PFS was not associated with international prognostic index, tumor maximum diameter, HBV infection status, or number of rituximab treatment cycles, and OS was only associated with age >60 years (P < 0.05). R-chemo was well tolerated. The incidence of HBV reactivation in hepatitis B surface antigen (HBsAg)-positive and HBsAg-negative/hepatitis B core antibody-positive patients was 13% (3/24) and 4% (3/69), respectively. CONCLUSIONS R-chemo is effective and safe in real-world clinical practice as first-line treatment for DLBCL and FL in China, and that HBV reactivation during R-chemo is manageable with preventive measures and treatment. TRIAL REGISTRATION ClinicalTrials.gov, NCT01340443; https://clinicaltrials.gov/ct2/show/NCT01340443.
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Affiliation(s)
- Jian-Qiu Wu
- Department of Oncology, Jiangsu Cancer Hospital & Jiangsu Institute of Cancer Research & Nanjing Medical University Affiliated Cancer Hospital, Nanjing, Jiangsu 210008, China
| | - Yong-Ping Song
- Department of Hematology, Henan Cancer Hospital, Zhengzhou, Henan 450000, China
| | - Li-Ping Su
- Department of Hematology, Shanxi Cancer Hospital, Taiyuan, Shanxi 030013, China
| | - Ming-Zhi Zhang
- Department of Oncology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450000, China
| | - Wei Li
- Department of Oncology, Jilin University First Affiliated Hospital, Changchun, Jilin 130000, China
| | - Yu Hu
- Department of Hematology, Union Hospital Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430072, China
| | - Xiao-Hong Zhang
- Department of Hematology, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, China
| | - Yu-Huan Gao
- Department of Hematology, Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, China
| | - Zuo-Xing Niu
- Department of Oncology, Affiliated Hospital of Shandong Academy of Medical Sciences, Jinan, Shandong 250000, China
| | - Ru Feng
- Department of Hematology, Medical University Nanfang Hospital, Guangzhou, Guangdong 510000, China
| | - Wei Wang
- Department of Oncology, Guangdong Foshan First Hospital, Foshan, Guangdong 528000, China
| | - Jie-Wen Peng
- Department of Oncology, Guangdong Zhongshan People's Hospital, Zhongshan, Guangdong 528403, China
| | - Xiao-Lin Li
- Department of Hematology, Xiangya Hospital Central South University, Changsha, Hunan 410008, China
| | - Xue-Nong Ouyang
- Department of Oncology, Fuzhou General Hospital of Nanjing Military Command, Fuzhou, Fujian 350001, China
| | - Chang-Ping Wu
- Department of Oncology, Changzhou First People's Hospital, Changzhou, Jiangsu 213000, China
| | - Wei-Jing Zhang
- Department of Oncology, 307 Hospital of Chinese People's Liberation Army, Beijing 100070, China
| | - Yun Zeng
- Department of Hematology, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650221, China
| | - Zhen Xiao
- Department of Hematology, Affiliated Hospital of Neimenggu Medical College, Hohhot, Huhehaote, Inner Mongolia 010050, China
| | - Ying-Min Liang
- Department of Hematology, The Fourth Military Medical University Affiliated Tangdu Hospital, Xi'an, Shaanxi 710038, China
| | - Yong-Zhi Zhuang
- Department of Oncology, Daqing General Hospital Group Oilfield General Hospital, Daqing, Heilongjiang 163001, China
| | - Ji-Shi Wang
- Department of Hematology, Affiliated Hospital of Guiyang Medical College, Guiyang, Guizhou 550004, China
| | - Zi-Min Sun
- Department of Hematology, Anhui Provincial Hospital, Hefei, Anhui 23000, China
| | - Hai Bai
- Department of Hematology, Lanzhou Military Hospital, Lanzhou, Gansu 730046, China
| | - Tong-Jian Cui
- Department of Oncology, Fujian Provincial Hospital, Fuzhou, Fujian 350001, China
| | - Ji-Feng Feng
- Department of Oncology, Jiangsu Cancer Hospital & Jiangsu Institute of Cancer Research & Nanjing Medical University Affiliated Cancer Hospital, Nanjing, Jiangsu 210008, China
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Lin GN, Jiang XM, Peng JW, Xiao JJ, Liu DY, Xia ZJ. Prognostic significance of the peripheral blood absolute monocyte count in patients with locally advanced or metastatic hepatocellular carcinoma receiving systemic chemotherapy. Asian Pac J Cancer Prev 2017; 15:6387-90. [PMID: 25124630 DOI: 10.7314/apjcp.2014.15.15.6387] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The prognostic significance of the circulating absolute monocyte count (AMC) in patients with locally advanced hepatocellular carcinoma (HCC) is uncertain. This study was designed to assess the association of circulating AMC with survival outcomes in patients diagnosed with locally advanced or metastatic HCC receiving systemic chemotherapy. MATERIALS AND METHODS Between January 1, 2005 and December 30, 2012, locally advanced or metastatic HCC patients who had Child-Pugh stage A or B disease and received systemic chemotherapy were retrospectively enrolled. Patient features including gender, age, extrahepatic metastasis, Child-Pugh stage, serum alpha-fetoprotein(AFP) level and AMC were collected to investigate their prognostic impact on overall survival(OS). RESULTS A total of 216 patients were eligible for the study. The optimal cut-off value of AMC for OS analysis was 0.38×10⁹/L. Median OS was 5.84 months in low-AMC group (95% confidence interval [CI], 5.23 to 6.45), and 5.21 months in high-AMC group (95% CI, 4.37 to 6.04; p=0.003). In COX multivariate analysis, elevated AMC remained as an independent prognostic factor for worse OS (HR, 1.578; 95% CI, 1.120 to 2.223, p=0.009). CONCLUSIONS Our results indiicate that circulating AMC is confirmed to be an independent prognostic factor for OS in patients with locally advanced or metastatic HCC receiving systemic chemotherapy.
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Affiliation(s)
- Gui-Nan Lin
- Department of Medical Oncology, Zhongshan Hospital of Sun Yat-sen University, Zhongshan City People's Hospital, Zhongshan, People's Republic of China E-mail :
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Luo HY, Li YH, Wang W, Wang ZQ, Yuan X, Ma D, Wang FH, Zhang DS, Lin DR, Lin YC, Jia J, Hu XH, Peng JW, Xu RH. Single-agent capecitabine as maintenance therapy after induction of XELOX (or FOLFOX) in first-line treatment of metastatic colorectal cancer: randomized clinical trial of efficacy and safety. Ann Oncol 2016; 27:1074-1081. [PMID: 26940686 DOI: 10.1093/annonc/mdw101] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 02/17/2016] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND The optimal strategy of maintenance therapy for patients with mCRC is controversial. This study was to evaluate the efficacy and safety of maintenance therapy with capecitabine versus observation following inductive chemotherapy in patients with metastatic colorectal cancer. PATIENTS AND METHODS In this randomized, open-label, multicenter, phase III trial, patients who received 18-24 weeks of induction chemotherapy with XELOX or FOLFOX and achieved disease control were randomly assigned centrally (1:1) to receive maintenance therapy of capecitabine or only observation until disease progression. The primary end point was progression-free survival (PFS) from randomization; the secondary end points included overall survival (OS), PFS from induction treatment (PFS2) and safety. Analyses were done by intention to treat. This trial is registered with ClinicalTrials.gov, number NCT02027363. RESULTS Between 30 July 2010 and 15 September 2013, 274 patients were enrolled in the study from 11 sites in China and randomly assigned to maintenance group (n = 136) or observation group (n = 138). Clinicopathological characteristics were balanced in two groups. The median follow-up time from randomization was 29.0 months [interquartile range (IQR) 21-36 months]. The primary end point of PFS was statistically significantly longer in capecitabine maintenance group than in observation group {6.43 [95% confidence interval (CI) 5.26-7.71] versus 3.43 (2.83-4.16) months, HR 0.54 (0.42-0.70), P < 0.001}. The median OS of capecitabine maintenance group was longer than that of observation group, but not statistically significant [25.63 (22.46-27.80) versus 23.30 (19.68-26.92) months; HR 0.85 (0.64-1.11), P = 0.2247]. Similar safety profiles were observed in both arms. The most common grade 3 or 4 toxicities in capecitabine maintenance group versus observation group were neutropenia, hand-foot syndrome, and mucositis. CONCLUSIONS Maintenance therapy with a single agent of capecitabine can be considered an appropriate option following the induction of XELOX or FOLFOX in mCRC patients with acceptable toxicities. CLINICAL TRIALS NUMBER NCT02027363.
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Affiliation(s)
- H Y Luo
- Department of Medical Oncology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou
| | - Y H Li
- Department of Medical Oncology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou
| | - W Wang
- Department of Medical Oncology, The First People's Hospital of Foshan, Guangzhou
| | - Z Q Wang
- Department of Medical Oncology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou
| | - X Yuan
- Department of Medical Oncology, Huizhou Central Hospital, Huizhou
| | - D Ma
- Department of Medical Oncology, Guangdong General Hospital, Guangzhou
| | - F H Wang
- Department of Medical Oncology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou
| | - D S Zhang
- Department of Medical Oncology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou
| | - D R Lin
- Department of Medical Oncology, Jiangmen Central Hospital, Jiangmen
| | - Y C Lin
- Department of Medical Oncology, Cancer Hospital of Shantou University Medical College, Shantou
| | - J Jia
- Department of Medical Oncology, Dongguan People's Hospital, Dongguan
| | - X H Hu
- Department of Medical Oncology, Tumor Hospital of Guangxi Medical University, Nanning
| | - J W Peng
- Department of Medical Oncology, Zhongshan People's Hospital, Zhongshan, China
| | - R H Xu
- Department of Medical Oncology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou.
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Peng JW, Liu DY, Lin GN, Xiao JJ, Xia ZJ. Hepatitis B Virus Infection Is Associated with Poor Prognosis in Patients with Advanced Non Small Cell Lung Cancer. Asian Pac J Cancer Prev 2016. [PMID: 26225667 DOI: 10.7314/apjcp.2015.16.13.5285] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Hepatitis B virus (HBV) infection has been reported to be associated with inferior prognosis in hepatocellular and pancreatic carcinoma cases, but has not been studied with respect to non small cell lung cancer (NSCLC). The purpose of this study was to investigate the prognostic significance of HBV infection in advanced NSCLC patients. MATERIALS AND METHODS A retrospective cohort of 445 advanced NSCLC patients was recruited at our hospital from January 1, 2003 until August 30, 2014. Serum HBV markers were tested by enzyme-linked immunosorbent assay. COX proportional hazards analysis was used to evaluate associations of HBV infection with overall survival (OS). RESULTS Of 445 patients who were qualified for the study, 68 patients were positive for HBsAg, also considered as HBV infection. Patients in HBsAg negative group were found to have better OS (12.6 months [12.2-12.9]) than those in HBsAg positive group (11.30 months [10.8-11.9]; p=0.001). Furthermore, COX multivariate analysis identified HBV infection as an independent prognostic factor for OS (HR 0.740 [0.560, 0.978], p=0.034). CONCLUSIONS Our study found that HBsAg-positive status was an independent prognostic factor for OS in patients with advanced NSCLC. Future prospective studies are required to confirm our findings.
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Affiliation(s)
- Jie-Wen Peng
- Department of Medical Oncology, Zhongshan Hospital of Sun Yat-sen University, Zhongshan City People's Hospital, People's Republic of China E-mail :
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Lin GN, Liu PP, Liu DY, Peng JW, Xiao JJ, Xia ZJ. Prognostic significance of the pre-chemotherapy lymphocyte-to-monocyte ratio in patients with previously untreated metastatic colorectal cancer receiving FOLFOX chemotherapy. Chin J Cancer 2016; 35:5. [PMID: 26740116 PMCID: PMC4704261 DOI: 10.1186/s40880-015-0063-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2015] [Accepted: 11/18/2015] [Indexed: 11/14/2022]
Abstract
Background As a surrogate marker of systemic inflammation, the lymphocyte-to-monocyte ratio (LMR) is an independent prognostic factor for various malignancies. This study investigated the prognostic significance of the pre-chemotherapy LMR in patients with previously untreated metastatic colorectal cancer (mCRC) receiving chemotherapy. Methods The present study included newly diagnosed mCRC patients treated between January 2005 and December 2013 with FOLFOX chemotherapy, specifically oxaliplatin 180 mg/m2 on day 1, with leucovorin 400 mg/m2 administered as a 2-hour infusion before the administration of 5-fluorouracil 400 mg/m2 as an intravenous bolus injection, and 5-fluorouracil 2400 mg/m2 as a 46-h infusion immediately after 5-fluorouracil bolus injection. The LMR was calculated as the absolute count of lymphocytes divided by the absolute count of monocytes. COX proportional hazards analysis was performed to evaluate the association of LMR with survival outcomes. Results A total of 488 patients were included. Patients with high pre-chemotherapy LMR experienced significant improvements in progression-free survival (PFS, 9.2 vs. 7.6 months, P < 0.001) and overall survival (OS, 19.4 vs. 16.6 months, P < 0.001) compared with patients with low pre-chemotherapy LMR. Subsequent COX multivariate analysis showed that high pre-chemotherapy LMR (≥3.11) was an independent favorable prognostic factor for PFS and OS. Additionally, patients whose LMR remained high (high–high subgroup), increased (low–high subgroup), or decreased (high–low subgroup) following chemotherapy showed better results in terms of PFS and OS than patients whose LMR remained low (low–low subgroup) after chemotherapy. Conclusions For patients with previously untreated mCRC receiving FOLFOX chemotherapy, an elevated pre-chemotherapy LMR is an independent favorable prognostic factor for PFS and OS, and changes in the LMR before and after chemotherapy seem to predict the benefit of chemotherapy.
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Affiliation(s)
- Gui-Nan Lin
- Department of Medical Oncology, Zhongshan City People's Hospital/Zhongshan Hospital of Sun Yat-sen University, Zhongshan, Guangdong, 528400, P.R. China.
| | - Pan-Pan Liu
- Department of Medical Oncology, Sun Yat-sen University Cancer Center; State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, 510060, P.R. China.
| | - Dong-Ying Liu
- Department of Clinical Oncology, Jiangmen City Central Hospital/Jiangmen Hospital of Sun Yat-sen University, Jiangmen, Guangdong, 529071, P.R. China.
| | - Jie-Wen Peng
- Department of Medical Oncology, Zhongshan City People's Hospital/Zhongshan Hospital of Sun Yat-sen University, Zhongshan, Guangdong, 528400, P.R. China.
| | - Jian-Jun Xiao
- Department of Medical Oncology, Zhongshan City People's Hospital/Zhongshan Hospital of Sun Yat-sen University, Zhongshan, Guangdong, 528400, P.R. China.
| | - Zhong-Jun Xia
- Department of Hematologic Oncology, Sun Yat-sen University Cancer Center; State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, 510060, P.R. China.
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Lin GN, Peng JW, Liu PP, Liu DY, Xiao JJ, Chen XQ. Elevated neutrophil-to-lymphocyte ratio predicts poor outcome in patients with advanced non-small-cell lung cancer receiving first-line gefitinib or erlotinib treatment. Asia Pac J Clin Oncol 2014; 13:e189-e194. [PMID: 25359280 DOI: 10.1111/ajco.12273] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/21/2014] [Indexed: 02/06/2023]
Abstract
AIM Elevated neutrophil-to-lymphocyte ratio (NLR) has been demonstrated to be a poor prognostic factor in multiple types of malignancies, whereas the effect of NLR on the prognosis of epidermal growth factor receptor (EGFR)-mutated advanced non-small-cell lung cancer (NSCLC) patients treated with first-line EGFR tyrosine kinase inhibitors (TKIs) is not fully addressed. METHODS 81 metastatic NSCLC patients harboring EGFR mutation treated with first-line EGFR TKIs were retrospectively included. The associations between baseline clinical characteristics, including NLR, and tumor response, progression and survival were investigated. RESULTS Elevated NLR (≥3.5) was observed in 33 of 81 patients. The progression-free and overall survival of the patients with increased NLR was significantly worse than that of the patients with decreased NLR (8.20 vs 10.60 months, P < 0.001 and 17.20 vs 23.20 months, P < 0.001, respectively). Elevated NLR was confirmed to be an independent prognostic factor for worse progression-free and overall survival in Cox multivariate analysis. CONCLUSION Elevated NLR is likely to be associated with poor outcome in EGFR-mutated advanced NSCLC patients treated with first-line EGFR TKIs.
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Affiliation(s)
- Gui-Nan Lin
- Department of Medical Oncology, Zhongshan Hospital of Sun Yat-sen University, Zhongshan City People's Hospital, Zhongshan, China
| | - Jie-Wen Peng
- Department of Medical Oncology, Zhongshan Hospital of Sun Yat-sen University, Zhongshan City People's Hospital, Zhongshan, China
| | - Pan-Pan Liu
- Department of Medical Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Dong-Ying Liu
- Department of Clinical Oncology, Jiangmen Hospital of Sun Yat-sen University, Jiangmen Central Hospital, Jiangmen, China
| | - Jian-Jun Xiao
- Department of Medical Oncology, Zhongshan Hospital of Sun Yat-sen University, Zhongshan City People's Hospital, Zhongshan, China
| | - Xiao-Qin Chen
- Department of Hematologic Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China
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Lin GN, Peng JW, Liu DY, Xiao JJ, Chen YQ, Chen XQ. Increased lymphocyte to monocyte ratio is associated with better prognosis in patients with newly diagnosed metastatic nasopharyngeal carcinoma receiving chemotherapy. Tumour Biol 2014; 35:10849-54. [DOI: 10.1007/s13277-014-2362-6] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2014] [Accepted: 07/14/2014] [Indexed: 11/24/2022] Open
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Lin GN, Peng JW, Xiao JJ, Liu DY, Xia ZJ. Prognostic impact of circulating monocytes and lymphocyte-to-monocyte ratio on previously untreated metastatic non-small cell lung cancer patients receiving platinum-based doublet. Med Oncol 2014; 31:70. [PMID: 24927957 DOI: 10.1007/s12032-014-0070-0] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [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: 05/14/2014] [Accepted: 06/04/2014] [Indexed: 12/13/2022]
Abstract
The link between circulating lymphocyte-to-monocyte ratio (LMR) and newly diagnosed metastatic non-small cell lung cancer (NSCLC) is not fully defined. The study was conducted to evaluate the prognostic impact of LMR on survival outcomes in previously untreated metastatic NSCLC patients receiving platinum-based doublet. Chemotherapy-naive metastatic NSCLC patients undergoing platinum-based doublet were retrospectively enrolled. Clinical features regarding gender, age, Eastern Cooperative Oncology Group (ECOG) performance status, histology, absolute lymphocyte count (ALC), absolute monocyte count (AMC) and LMR were collected to determinate their prognostic impact on progression-free survival (PFS) and overall survival (OS). Up to 370 patients were eligible for the study. By univariate analysis, ECOG performance status, histology, ALC, AMC and LMR were showed to be significantly associated with PFS and OS. In subsequent Cox multivariate analysis, non-squamous cell carcinoma, ALC ≥ 2.45 × 10(9)/L, AMC <0.45 × 10(9)/L and LMR ≥ 4.56 were demonstrated to be independently correlated with better PFS. In addition, independent favorable prognostic factors for OS were only limited to LMR ≥ 4.56 and non-squamous cell carcinoma, whereas ECOG performance status of 2 and AMC ≥ 0.45 × 10(9)/L remained as independently inferior prognostic indicators for OS. Our findings implicate that circulating AMC and LMR are regarded as independent prognostic factors for PFS and OS in previously untreated metastatic NSCLC patients receiving platinum-based doublet.
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Affiliation(s)
- Gui-Nan Lin
- Department of Medical Oncology, Zhongshan Hospital of Sun Yat-sen University, Zhongshan City People's Hospital, Zhongshan, People's Republic of China
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Hu YB, Lin Z, Feng DY, Li X, Chu L, Jiang HY, Peng JW. Silica Induces Plasminogen Activator Inhibitor-1 Expression through a MAPKs/AP-1-Dependent Mechanism in Human Lung Epithelial Cells. Toxicol Mech Methods 2012; 18:561-7. [PMID: 20020854 DOI: 10.1080/15376510701795470] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
ABSTRACT Plasminogen activator inhibitor-1 (PAI-1) plays an important role in the silica-induced pulmonary fibrosis. The effect of silica on the expression of PAI-1 was investigated in human lung epithelial cells (A549). Silica induced PAI-1 expression in a concentration-(50-200 mug/mL) and time-(4-24 h) dependent manner in A549 cells. Furthermore, the roles of mitogen-activated protein kinase (MAPK)/activator protein-1 (AP-1) signaling pathways in silica-induced PAI-1 expression were examined. We found that silica (200 mug/mL) treatment for 4 to 24 h resulted in AP-1 activation in A549 cells. Cells were pretreated with the AP-1 inhibitor curcumin (10, 25, 50 muM), and silica-induced PAI-1 expression was reduced by 20%, 63%, and 65%, respectively. In addition, dominant-negative mutant c-Jun (TAM67) down-regulated silica-induced PAI-1 expression by 59%. P38 kinase inhibitor SB203580 (20 muM) and Erk inhibitor PD98059 (50 muM) suppressed silica-induced PAI-1 expression by 35% and 51%, respectively. Additionally, PD98059 but not SB203580 inhibited the AP-1 DNA binding activity induced by silica. The results suggest that the PAI-1 expression induced by silica may be involved in the activation of MAPKs/AP-1 signaling pathways in human lung epithelial cells.
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Affiliation(s)
- Y B Hu
- Department of Pathology, Xiangya Medical School, Central South University, Tong Zi Po Road 172, Changsha410013, China
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Peng JW, Lin GN, Xiao JJ, Jiang XM. Hepatitis B virus reactivation in hepatocellular carcinoma patients undergoing transcatheter arterial chemoembolization therapy. Asia Pac J Clin Oncol 2012; 8:356-61. [PMID: 22897940 DOI: 10.1111/j.1743-7563.2012.01534.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
AIM The effect of transcatheter arterial chemoembolization (TACE) therapy on hepatitis B virus (HBV) reactivation in hepatocellular carcinoma (HCC) patients with prior resolved hepatitis B is not fully understood. METHODS From January 2006 to December 2010, 43 hepatitis B surface antigen (HBsAg)-negative/anti-hepatitis B core antigen (HBc) positive patients with newly diagnosed unresectable HCC were enrolled in the study. All underwent TACE therapy. RESULTS Four patients (9.3%) developed HBV reactivation with mild/moderate hepatitis. The median number of TACE cycles received was 3.5 (range 3-4 cycles). The median time interval between the occurrence of HBV reactivation and the completion of TACE therapy was 3 months (range 1-5 months) and their median HBV DNA level was 1.58 × 10(4) IU/mL (range, 1.65 × 10(3) -6.42 × 10(4) IU/mL). After the introduction of lamivudine at the occurrence of HBV reactivation, all had resolution of hepatitis. An exploratory analysis indicated that significant predictors of HBV reactivation included increased serum total bilirubin coexisting with cirrhosis and the total number of cycles of TACE received. CONCLUSION The administration of TACE therapy may increase the risk of HBV reactivation in HBsAg-negative/anti-HBc-positive patients diagnosed with unresectable HCC. Further studies are warranted to explore the optimal management of HBV reactivation in patients with prior resolved hepatitis B.
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Affiliation(s)
- Jie-Wen Peng
- Department of Medical Oncology, Zhongshan Hospital of Sun Yat-sen University, Zhongshan People's City Hospital, Zhongshan 528403, China
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Abstract
Nuclear Magnetic Resonance (NMR) spectroscopy is a powerful tool for investigating the dynamics of biomolecules since it provides a description of motion that is comprehensive, site-specific, and relatively non-invasive. In particular, the study of protein dynamics has benefited from sustained methodological advances in NMR that have expanded the scope and time scales of accessible motion. Yet, many of these advances may not be well known to the more general physical chemistry community. Accordingly, this Perspective provides a glimpse of some of the more powerful methods in liquid state NMR that are helping reshape our understanding of functional motions of proteins.
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Affiliation(s)
- J W Peng
- Department of Chemistry and Biochemistry & Department of Physics University of Notre Dame, Notre Dame, IN 46556
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Chen XQ, Peng JW, Lin GN, Li M, Xia ZJ. The effect of prophylactic lamivudine on hepatitis B virus reactivation in HBsAg-positive patients with diffuse large B-cell lymphoma undergoing prolonged rituximab therapy. Med Oncol 2011; 29:1237-41. [PMID: 21556931 DOI: 10.1007/s12032-011-9974-0] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [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: 03/28/2011] [Accepted: 04/29/2011] [Indexed: 12/19/2022]
Abstract
The association of prolonged rituximab therapy and hepatitis B virus (HBV) reactivation in diffuse large B-cell lymphoma (DLBCL) and the role of lamivudine prophylaxis remain undefined. The prevalence and mortality of HBV reactivation in HBsAg-positive patients with DLBCL undergoing rituximab-based treatment, who received prophylactic treatment with or without lamivudine, were retrospectively analyzed. From January 2003 to December 2009, there were 50 patients enrolled in the study, among of which 30 received the prophylactic treatment of lamivudine and 20 without prophylactic treatment of lamivudine. Among of the 50 patients, seven patients received further rituximab maintenance, once every 3 months for 2 years. Compared with lamivudine treatment group, it showed that there was significantly higher prevalence of HBV reactivation (60.0% vs 13.3%, P = .001), severe hepatitis (45.0% vs 6.7%, P = .004), and mortality (25.0% vs 3.3%, P = .032) in non-lamivudine prophylactic group; however, there was no statistically significant difference in the HBV DNA levels at reactivation (3.94 × 10(6) vs 8.30 × 10(5) copies/ml, P = .47) and the time from first dose of rituximab to HBV reactivation(207 vs 386 days, P = .28). For patients undergoing further rituximab maintanence treatment, the prevalence and mortality of HBV reactivation were 71.4 and 28.6%, respectively. The prevalence and mortality of HBV reactivation are 66.7% vs 75.0% (P = 1.00) and 0 vs 50.0% (P = .43) in lamivudine prophylactic and non-lamivudine prophylactic groups, respectively. The effect of lamivudine prophylaxis on preventing HBV reactivation was found to be less in patients undergoing longer duration of rituximab treatment. A longer duration of rituximab treatment contributed to higher morbidity and mortality of HBV reactivation in HbsAg-positive patients with DLBCL. Further study is warranted for the optimal management of hepatitis caused by HBV reactivation.
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Affiliation(s)
- Xiao-Qin Chen
- Department of Hematologic Oncology, Sun Yat-sen University Cancer Center, 651 Dongfeng Road East, Guangzhou 510060, People's Republic of China
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21
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Affiliation(s)
- J W Peng
- Vertex Pharmaceuticals Incorporated, Cambridge, Massachusetts 02139, USA
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22
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Abstract
Fluorine is often used in drug-design efforts to enhance the pharmacokinetic properties of biologically active compounds. Additionally fluorine nuclei ((19)F) have properties that are well suited to current pharmaceutical NMR screening programs. Together, these considerations have motivated our interest in the utility of fluorine relaxation parameters to study ligand-receptor interactions. Here, we investigate the potential for cross-correlated relaxation effects between the (19)F anisotropic chemical-shift and (19)F-(1)H dipole-dipole relaxation mechanisms to help pinpoint and quantify exchange processes. Methods are proposed and demonstrated in which the magnitude ratio of the transverse cross-correlation rate constant eta(xy) and the fluorine transverse relaxation rate constant, R(2), help estimate the exchange rate constant for ligand-binding equilibria. These exchange rate constants provide estimates of the ligand dissociation rate constants k(off) and can thus provide a means for rank-ordering the binding affinities of ligands identified in pharmaceutical screens.
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Affiliation(s)
- J W Peng
- Protein NMR Group, Vertex Pharmaceuticals, Inc., 130 Waverly Street, Cambridge, MA 02139-4242, USA.
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23
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Abstract
The amyloid Abeta(10-35)-NH2 peptide is simulated in an aqueous environment on the nanosecond time scale. One focus of the study is on the validation of the computational model through a direct comparison of simulated statistical averages with experimental observations of the peptide's structure and dynamics. These measures include (1) nuclear magnetic resonance spectroscopy-derived amide bond order parameters and temperature-dependent H(alpha) proton chemical shifts, (2) the peptide's radius of gyration and end-to-end distance, (3) the rates of peptide self-diffusion in water, and (4) the peptide's hydrodynamic radius as measured by quasielastic light scattering experiments. A second focus of the study is the identification of key intrapeptide interactions that stabilize the central structural motif of the peptide. Particular attention is paid to the structure and fluctuation of the central LVFFA hydrophobic cluster (17-21) region and the VGSN turn (24-27) region. There is a strong correlation between preservation of the structure of these elements and interactions between the cluster and turn regions in imposing structure on the peptide monomer. The specific role of these interactions in relation to proposed mechanisms of amyloidosis is discussed.
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Affiliation(s)
- F Massi
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, USA
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24
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Zhang S, Iwata K, Lachenmann MJ, Peng JW, Li S, Stimson ER, Lu Y, Felix AM, Maggio JE, Lee JP. The Alzheimer's peptide a beta adopts a collapsed coil structure in water. J Struct Biol 2000; 130:130-41. [PMID: 10940221 DOI: 10.1006/jsbi.2000.4288] [Citation(s) in RCA: 276] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The self-assembly of the soluble peptide Abeta into Alzheimer's disease amyloid is believed to involve a conformational change. Hence the solution conformation of Abeta is of significant interest. In contrast to studies in other solvents, in water Abeta is collapsed into a compact series of loops, strands, and turns and has no alpha-helical or beta-sheet structure. Conformational stabilization is primarily attributed to van der Waals and electrostatic forces. A large conspicuous uninterrupted hydrophobic patch covers approximately 25% of the surface. The compact coil structure appears meta-stable, and because fibrillization leads to formation of intermolecular beta-sheet secondary structure, a global conformational rearrangement is highly likely. A molecular hypothesis for amyloidosis includes at least two primary driving forces, changes in solvation thermodynamics during formation of amyloid deposits and relief of internal conformational stress within the soluble precursor during formation of lower-energy amyloid fibrils.
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Affiliation(s)
- S Zhang
- Department of Chemistry, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts, 02215, USA
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25
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Chen YM, Ting CC, Peng JW, Yang WK, Yang KY, Tsai CM, Perng RP. Restoration of cytotoxic T lymphocyte function in malignant pleural effusion: interleukin-15 vs. interleukin-2. J Interferon Cytokine Res 2000; 20:31-9. [PMID: 10670650 DOI: 10.1089/107999000312711] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [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: 11/12/2022] Open
Abstract
The present study attempts to define the role of interleukin-15 (IL-15), as compared with IL-2, in generating cytotoxic T lymphocytes (CTL) from the malignant effusions of cancer patients. Effusion-associated lymphocytes (EAL) from malignant effusion were incubated with IL-15 or IL-2 with or without alphaCD3. Proliferation and cytotoxicity assays were performed. IL-15 was found to have at least an equivalent, if not higher, activity to IL-2 in terms of lymphocyte proliferation and generation of CTL from EAL. The proliferative response of EAL, cocultured with IL-15, with or without alphaCD3, was partly inhibited by pretreatment with an anti-IL2 receptor beta chain monoclonal antibody (mAb). The proliferative response of EAL, cocultured with alphaCD3, IL-2, or both, was partly inhibited by pretreatment with an anti-IL-2 receptor alpha chain mAb. Overnight [5lCr] release assays against K562, Daudi, and the patients' autologous tumor cells were done to evaluate EAL's cytolytic activity. MHC class I Ab blocked the stimulated cytolytic activity of EAL against autologous tumors. An mAb depletion assay showed that the phenotype of the restored EAL was CD16-CD4-CD8+; thus, the restored activity of EAL was CTL activity. The results suggest that both IL-15 and IL-2 can restore CTL activity from EAL in the presence of T cell receptor (TCR)-CD3 engagement, but the effect of IL-15 was superior.
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MESH Headings
- Adenocarcinoma/immunology
- Adenocarcinoma/pathology
- Carcinoma, Non-Small-Cell Lung/immunology
- Carcinoma, Non-Small-Cell Lung/pathology
- Cell Division/drug effects
- Cells, Cultured
- Cytotoxicity, Immunologic/drug effects
- Histocompatibility Antigens Class I/immunology
- Humans
- Immunophenotyping
- Immunotherapy, Adoptive
- Interleukin-15/pharmacology
- Interleukin-2/pharmacology
- Lung Neoplasms/immunology
- Lung Neoplasms/pathology
- Lymphocyte Activation/drug effects
- Lymphocytes, Tumor-Infiltrating/drug effects
- Lymphocytes, Tumor-Infiltrating/immunology
- Muromonab-CD3/pharmacology
- Pleural Effusion, Malignant/immunology
- Receptor-CD3 Complex, Antigen, T-Cell/immunology
- Receptors, Interleukin-2/antagonists & inhibitors
- Receptors, Interleukin-2/drug effects
- Receptors, Interleukin-2/immunology
- Receptors, Interleukin-2/physiology
- Recombinant Proteins/pharmacology
- T-Lymphocytes, Cytotoxic/drug effects
- T-Lymphocytes, Cytotoxic/immunology
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Affiliation(s)
- Y M Chen
- Chest Department, Veterans' General Hospital-Taipei, School of Medicine, National Yang-Ming University, Taiwan.
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26
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Abstract
BACKGROUND Recently, it has been shown that nuclear magnetic resonance (NMR) may be used to identify ligands that bind to low molecular weight protein drug targets. Recognizing the utility of NMR as a very sensitive method for detecting binding, we have focused on developing alternative approaches that are applicable to larger molecular weight drug targets and do not require isotopic labeling. RESULTS A new method for lead generation (SHAPES) is described that uses NMR to detect binding of a limited but diverse library of small molecules to a potential drug target. The compound scaffolds are derived from shapes most commonly found in known therapeutic agents. NMR detection of low (microM-mM) affinity binding is achieved using either differential line broadening or transferred NOE (nuclear Overhauser effect) NMR techniques. CONCLUSIONS The SHAPES method for lead generation by NMR is useful for identifying potential lead classes of drugs early in a drug design program, and is easily integrated with other discovery tools such as virtual screening, high-throughput screening and combinatorial chemistry.
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Affiliation(s)
- J Fejzo
- Vertex Pharmaceuticals Incorporated 130 Waverly Street, Cambridge, MA 02139-4242, USA
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27
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Huang X, Peng JW, Speck NA, Bushweller JH. Solution structure of core binding factor beta and map of the CBF alpha binding site. Nat Struct Biol 1999; 6:624-7. [PMID: 10404216 DOI: 10.1038/10670] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The core binding factor beta subunit (CBF beta) is the non-DNA binding subunit of the core-binding factors, transcription factors essential for multiple developmental processes including hematopoiesis and bone development. Chromosomal translocations involving the human CBFB gene are associated with a large percentage of human leukemias. The N-terminal 141 amino acids of CBF beta contains the heterodimerization domain for the DNA-binding CBF alpha subunits, and is sufficient for CBF beta function in vivo. Here we present the high-resolution solution structure of the CBF beta heterodimerization domain. It is a novel alpha/beta structure consisting of two three-stranded beta-sheets packed on one another in a sandwich arrangement, with four peripheral alpha-helices. The CBF alpha binding site on CBF beta has been mapped by chemical shift perturbation analysis.
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Affiliation(s)
- X Huang
- Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville 22906, USA
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28
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Peng JW, Schiffer CA, Xu P, van Gunsteren WF, Ernst RR. Investigations of peptide hydration using NMR and molecular dynamics simulations: A study of effects of water on the conformation and dynamics of antamanide. J Biomol NMR 1996; 8:453-476. [PMID: 20859779 DOI: 10.1007/bf00228147] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/1996] [Accepted: 08/28/1996] [Indexed: 05/29/2023]
Abstract
The influence of water binding on the conformational dynamics of the cyclic decapeptide antamanide dissolved in the model lipophilic environment chloroform is investigated by NMR relaxation measurements. The water-peptide complex has a lifetime of 35 μs at 250 K, which is longer than typical lifetimes of water-peptide complexes reported in aqueous solution. In addition, there is a rapid intracomplex mobility that probably involves librational motions of the bound water or water molecules hopping between different binding sites. Water binding restricts the flexibility of antamanide. The experimental findings are compared with GROMOS molecular dynamics simulations of antamanide with up to eight bound water molecules. Within the simulation time of 600 ps, no water molecule leaves the complex. Additionally, the simulations show a reduced flexibility for the complex in comparison with uncomplexed antamanide. Thus, there is a qualitative agreement between the experimental NMR results and the computer simulations.
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Affiliation(s)
- J W Peng
- Laboratorium für Physikalische Chemie, ETH-Zentrum, Universitätsstrasse 22, CH-8092, Zürich, Switzerland
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29
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Fejzo J, Lepre CA, Peng JW, Su MS, Thomson JA, Moore JM. Dynamic NMR studies of ligand-receptor interactions: design and analysis of a rapidly exchanging complex of FKBP-12/FK506 with a 24 kDa calcineurin fragment. Protein Sci 1996; 5:1917-21. [PMID: 8880916 PMCID: PMC2143552 DOI: 10.1002/pro.5560050918] [Citation(s) in RCA: 10] [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: 02/02/2023]
Abstract
Dynamic NMR methods, such as differential line broadening and transferred NOE spectroscopy, are normally reserved for the study of small molecule ligand interactions with large protein receptors. Using a combination of isotope labeling and isotope edited NMR, we have extended these techniques to characterize interactions of a much larger protein/drug complex, FKBP-12/ FK506 with its receptor protein, calcineurin. In order to examine this multicomponent system by dynamic NMR methods, the 93 kDa, tightly bound FKBP-12/FK506/Cn complex was replaced with a lower affinity, rapidly exchanging system consisting of FKBP-12/FK506 (13 kDa), recombinant calcineurin subunit B (CnB) (20 kDa), and a synthetic peptide (4 kDa) corresponding to the B binding domain (BBD) of calcineurin catalytic subunit A (CnA). Analysis of 1H-13C HSQC data acquired for the FKBP-12/ 13C-FK506 and FKBP-12/13C-FK506/CnB/BBD complexes indicates that FKBP-12/FK506 and CnB/BBD are in fast exchange in the quaternary complex. Comparison of proton line widths shows significant broadening of resonances along the macrocycle backbone at 13-CH, 13-OMe, 15-OMe, 18-CH2, 20-CH, 21-CH, and 25-Me, as well as moderate broadening on the macrocycle backbone at 17-Me, 24-CH, and the pyranose 12-CH2 protons. The tri-substituted olefin and cyclohexyl groups also show moderate broadening at the 27-Me, 28-CH, and 30-CH2 positions, respectively. Unexpectedly, little line broadening was observed for the allyl resonances of FK506 in the quaternary complex, although 13C longitudinal relaxation measurements suggest this group also makes contacts with calcineurin. In addition, intermolecular transfer NOE peaks were observed for the allyl 37-CH2, 21-CH, 30-CH2, 13-OMe, 15-OMe, 17-Me, 25-Me, and 27-Me groups, indicating that these are potential sites on the FK506 molecule that interact with calcineurin.
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Affiliation(s)
- J Fejzo
- Vertex Pharmaceuticals Incorporated, Cambridge, Massachusetts 02139-4242, USA
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30
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Lefevre JF, Dayie KT, Peng JW, Wagner G. Internal mobility in the partially folded DNA binding and dimerization domains of GAL4: NMR analysis of the N-H spectral density functions. Biochemistry 1996; 35:2674-86. [PMID: 8611573 DOI: 10.1021/bi9526802] [Citation(s) in RCA: 206] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The DNA binding domain (residues 1--65) of the yeast transcriptional activator GAL4 is only partially folded. While residues 10-41, the DNA recognition domain, form a well-defined structure in the free protein, the whole polypeptide folds up and dimerizes upon binding DNA. In order to describe the mobility of the protein, we have characterized the frequency spectrum of the motions of N-H bond vectors of GAL4(1-65) using a reduced spectral density mapping approach (an approximation of the full spectral density mapping technique) [Peng, J. W., & Wagner, G. (1992a) J. Magn. Reson. 98, 308-332; Peng. J. W., & Wagner, G. (1992b) Biochemistry 31, 8571-8586]. 15N spin-lattice relaxation [Rn(Nz)], spin-spin relaxation [Rn(Nx,y)], cross-relaxation [RN(Hz-->Nz)], two-spin order [RNH(2HzNz)], and antiphase [RNH(2HzNx,y)] rates were determined for 52 of the 65 backbone amide groups at 10 degrees C and ph 6.5 at 11.74 T. Calculations of the spectral density functions using a reduced set of RN(Nz),RN(Nx,y),RN(Hz-->Nz), and RNH(2HzNz) gave excellent agreement with those calculated using all six sets. The reduced method has the added advantage that the errant behavior seen at high field values is circumvented. A linear correlation was found between J(omega N) and J(0) with a limited and clearly defined range of J(0) values which defines the range of rates for internal motions in GAL4(1-65). It appears that all residues experience a combination of two movements: one of the overall tumbling (correlation time, 8.65 ns) and the other of fast internal fluctuations of the structure. The respective weights of these contributions vary with the primary sequence and faithfully mirror the secondary and tertiary elements of the protein. The position on the correlation line of J(omega N) versus J(0) indicates the amount of angular averaging relative to the overall motion of the protein. A spectral density function for internal motions can be described.
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Affiliation(s)
- J F Lefevre
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts 02115, USA
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31
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Abstract
The internal mobility of the protein eglin c is characterized with spectral density functions of the NH vectors obtained from heteronuclear NMR relaxation at multiple field strengths (7.04, 11.74, and 14.1 T). The spectral density functions, J(omega), describe the frequency spectrum of the rotational fluctuations of the XH bond vectors (15N-1H and 13C-1H). The spectral density-mapping approach [Peng, J. W., & Wagner, G. (1992a) J. Magn. Reson. 98, 308-332; Peng, J. W., & Wagner, G (1992b) Biochemistry 31, 8571-8586] permits the direct evaluation of J(omega) at the five frequencies 0, omega N, magnitude of omega H - magnitude of omega X, omega H, and magnitude of omega H + magnitude of omega X. The 15N-1H relaxation measurements from three field strengths on 15N-enriched eglin c resulted in 18 relaxation rate constants per NH bond and 13 unique evaluations of each NH spectral density function. Dynamic heterogeneity along the protein backbone is manifested most clearly in spectral density values at lower frequencies (< 100 MHz). The effective value of J(0), J(eff)(0), is the most sensitive probe of dynamics as it is affected by both rapid internal motions and slow chemical exchange processes. Low J(eff)(0) and J(omega N) values are correlated with fast amide proton-deuteron exchange rates; the converse, however, is not observed. Anomalies in J(omega H) and J(magnitude of omega H +/- magnitude of omega N) observed in the first applications of the spectral-mapping approach are now attributable to the high sensitivity of these values to small errors in the rate constants. These anomalies can be reduced by the use of a reduced spectral-mapping procedure. The use of multiple field strengths allows the identification of slow exchange processes manifested as an increase of J(eff)(0) with spectrometer field strength.
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Affiliation(s)
- J W Peng
- Vertex Pharmaceuticals, Inc., Cambridge, Massachusetts 02139, USA
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32
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Affiliation(s)
- J W Peng
- Laboratory for Physical Chemistry, ETH-Zentrum, Zurich, Switzerland
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33
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Heinz DW, Hyberts SG, Peng JW, Priestle JP, Wagner G, Grütter MG. Changing the inhibitory specificity and function of the proteinase inhibitor eglin c by site-directed mutagenesis: functional and structural investigation. Biochemistry 1992; 31:8755-66. [PMID: 1390662 DOI: 10.1021/bi00152a011] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Amino acids in the serine proteinase inhibitor eglin c important for its inhibitory specificity and activity have been investigated by site-directed mutagenesis. The specificity of eglin c could be changed from elastase to trypsin inhibition by the point mutation Leu45----Arg (L45R) in position P1 [nomenclature according to Schechter and Berger (1967) Biochem. Biophys. Res. Commun. 27, 157-162]. Model building studies based on the crystal structure of mutant L45R [Heinz et al. (1991) J. Mol. Biol. 217, 353-371] were used to rationalize this specificity change. Surprisingly, the double mutant L45R/D46S was found to be a substrate of trypsin and various other serine proteinases. Multidimensional NMR studies show that wild-type eglin c and the double mutant have virtually identical conformations. In the double mutant L45R/D46S, however, the N-H bond vector of the scissile peptide bond shows a much higher mobility, indicating that the internal rigidity of the binding loop is significantly weakened due to the loss or destabilization of the internal hydrogen bond of the P1' residue. Mutant T44P was constructed to examine the role of a proline in position P2, which is frequently found in serine proteinase inhibitors [Laskowski and Kato (1980) Annu. Rev. Biochem. 49, 593-626]. The mutant remains a potent elastase inhibitor but no longer inhibits subtilisin, which could be explained by model building. Both Arg51 and Arg53, located in the core of the molecule and participating in the hydrogen bonding network with residues in the binding loop to maintain rigidity around the scissile bond, were individually replaced with the shorter but equally charged amino acid lysine. Both mutants showed a decrease in their inhibitory potential. The crystal structure of mutant R53K revealed the loss of two hydrogen bonds between the core and the binding loop of the inhibitor, which are partially restored by a solvent molecule, leading to a decrease in inhibition of elastase by 2 orders of magnitude.
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Affiliation(s)
- D W Heinz
- Pharmaceutical Research Division, Ciba-Geigy Ltd., Basel, Switzerland
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34
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Abstract
A new strategy is used for studying the internal motions of proteins based on measurements of NMR relaxation parameters. The strategy yields values of the so-called spectral density functions J(omega) for N-H bond vectors. The spectral density functions are related to the distribution of frequencies contained in the rotational (overall and internal) motions of these NH bond vectors. No a priori model assumptions about the dynamics are required in this approach. The method involves measurements of six relaxation parameters consisting of 15N longitudinal relaxation rates, transverse relaxation rates of in-phase and antiphase coherence, the relaxation rates of heteronuclear 1H-15N two-spin order, the heteronuclear 1H-15N nuclear Overhauser effects, and longitudinal relaxation rates of the amide protons. The values of the spectral density functions at the five frequencies 0, omega N, omega H + omega N, omega H, and omega H - omega N are determined from the relaxation parameters using analytical relations derived previously [Peng & Wagner (1992) J. Magn. Reson. 98, 308-332]. Here, the method is applied to characterize the backbone dynamics of the 15N-enriched proteinase inhibitor eglin c, a protein of 70 residues. The values for J(0) and J(omega N = 50 MHz) vary significantly with the amino acid sequence, whereas the spectral densities at higher frequencies, J(450 MHz), J(500 MHz), and J(550 MHz), are typically much smaller and show no significant variation with the sequence. The collective behavior of the J(omega) values indicate greater internal motion for the proteinase binding loop residues and the first eight N-terminal residues. The additional internal motion in these regions is in the rate range below 450 MHz. The values of J(omega) are also compared with root mean square deviations (rmsds) of backbone atoms as obtained in NMR structure determinations. Low values of J(0) and J(omega N) are correlated with high rmsds. Spectral densities at higher frequencies, J(450 MHz), J(500 MHz), and J(550 MHz), are small and show no correlation with rmsds. A comparison with the spectral density functions obtained by fitting the experimental data to the functional dependence of the Lipari and Szabo formalism [Lipari & Szabo (1982a) J. Am. Chem. Soc. 104, 4546-4559] is made.
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Affiliation(s)
- J W Peng
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts 02115
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35
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Wagner G, Thanabal V, Stockman BJ, Peng JW, Nirmala NR, Hyberts SG, Goldberg MS, Detlefsen DJ, Clubb RT, Adler M. NMR studies of structure and dynamics of isotope enriched proteins. Biopolymers 1992; 32:381-90. [PMID: 1320418 DOI: 10.1002/bip.360320414] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [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: 12/26/2022]
Abstract
Structural studies of globular proteins by nmr can be enhanced by the use of isotope enrichment. We have been working with proteins enriched with 15N, and with both 15N and 13C. Due to the isotope enrichment we could assign several large proteins with up to 186 residues and could address structural questions. Furthermore, we can accurately measure heteronuclear and homonuclear vicinal coupling constants. This involves in part multidimensional multiple resonance experiments. This is important for characterization of minor conformational changes caused by mutations. We have also made use of isotope enrichment to study the internal mobility of proteins. We also have developed novel methods for measuring accurately 15N relaxation parameters, in particular transverse relaxation rates. This has led us toward a method for directly mapping spectral density functions of the rotational motions of N-H bond vectors in proteins. The protein systems that are discussed include the unlabeled proteins kistrin and cytochrome c551, and the labeled proteins eglin c, a flavodoxin, and human dihydrofolate reductase.
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Affiliation(s)
- G Wagner
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts 02115
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36
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Crippen GM, Smellie AS, Peng JW. Use of augmented Lagrangians in the calculation of molecular conformations by distance geometry. J Chem Inf Comput Sci 1988; 28:125-8. [PMID: 3182949 DOI: 10.1021/ci00059a001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Distance geometry is a technique widely used to find atomic coordinates that agree with given upper and lower bounds on the interatomic distances. It is successful because it chooses at random some relatively good "trial coordinates" that take into account the whole molecule and all constraints at once. Customarily, these trial coordinates must be refined by minimizing a penalty function until the structure agrees with the original bounds. Here we present an alternative to minimizing the penalty function, which has the advantage of more precisely satisfying the bounds, showing more clearly when the bounds are mutually contradictory, and simultaneously optimizing an objective function subject to precise satisfaction of the bounds.
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Affiliation(s)
- G M Crippen
- College of Pharmacy, University of Michigan, Ann Arbor 48109
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