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Travers N, Dean A, Armstrong K, Peeperkorn L, Tan M, Das A. The tolerability and efficacy of FOLFIRINOX in gastro-oesophageal carcinoma. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz422.072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Chia B, Nei W, Fong K, Yap S, Chua K, Yip C, Ng W, Siow T, Tan M. EP1.18-17 Pre-Radical Radiotherapy Plasma EGFR DNA Levels in Lung Cancer Patients May Predict for Early Disease Progression. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.2462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Deek M, Cecil E, Sloan L, Cheng Z, Han P, Sheikh K, Gui C, Guo Y, Lakshminarayanan P, Fakhry C, Koch W, Gourin C, Tan M, Mydlarz W, Schmitt N, McNutt T, Page B, Kiess A, Richmon J, Quon H. Definitive Management of Early Stage Oropharyngeal Carcinoma: A Comparison of Long Term Outcomes Following Transoral Surgery or Definitive Chemoradiation. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.1516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Tan M, Johnston S, Nicholls J, Gompels M. Dual therapy with renally adjusted lamivudine and dolutegravir: a switch strategy to manage comorbidity and toxicity in older, suppressed patients? HIV Med 2019; 20:634-637. [PMID: 31338933 PMCID: PMC6790693 DOI: 10.1111/hiv.12781] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/10/2019] [Indexed: 11/27/2022]
Abstract
OBJECTIVES The aim of the study was to evaluate the efficacy of dual therapy with lamivudine (3TC), with dose adjustment for renal function, and dolutegravir (DTG) in a subgroup of patients fully suppressed on treatment who were switched because of concerns about comorbidity and toxicity on their current triple drug regimen. METHODS A retrospective evaluation of clinical and pathological parameters from an electronic patient record from a single centre was carried out. RESULTS There were no virological failures in 52 patients with a median age of 60.5 years. The median duration of follow-on dual therapy was 2.29 years (28 months; range 1.10-3.34 years). In 25 of 52 (48%) cases, the dose of 3TC was adjusted taking into account reduced renal function, and none of these patients experienced virological failure. Four additional patients discontinued early, because of side effects of the switch, with no failure. CONCLUSIONS This retrospective review suggests that 3TC and DTG may be effective in controlling viral load in older patients with comorbidities. This regimen appears to be a useful option in the context of comorbidities (including renal impairment) and polypharmacy in older patients. However, this review has been conducted in one centre and in a small population of patients. Therefore, further multicentre trials involving larger populations of patients are needed.
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Yakovliev A, Ziniuk R, Wang D, Xue B, Vretik LO, Nikolaeva OA, Tan M, Chen G, Slominskii YL, Qu J, Ohulchanskyy TY. Hyperspectral Multiplexed Biological Imaging of Nanoprobes Emitting in the Short-Wave Infrared Region. NANOSCALE RESEARCH LETTERS 2019; 14:243. [PMID: 31325079 PMCID: PMC6642248 DOI: 10.1186/s11671-019-3068-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Accepted: 07/01/2019] [Indexed: 05/19/2023]
Abstract
Optical bioimaging with exogenous luminophores emitting in short-wave infrared spectral region (SWIR, ~ 1000-1700 nm) is a rapidly developing field, and the development of multiple SWIR-photoluminescent nanoprobes has recently been reported. In this regard, hyperspectral imaging (HSI), combined with unmixing algorithms, is a promising tool that can allow for efficient multiplexing of the SWIR-emitting nanoagents by their photoluminescence (PL) spectral profiles. The SWIR HSI technique reported here is developed to multiplex two types of nanoprobes: polymeric nanoparticles doped with organic dye (PNPs) and rare-earth doped fluoride nanoparticles (RENPs). Both types of nanoprobes exhibit PL in the same spectral range (~ 900-1200 nm), which hinders spectral separation of PL with optical filters and limits possibilities for their multiplexed imaging in biological tissues. By applying SWIR HSI, we exploited differences in the PL spectral profiles and achieved the spectrally selective and sensitive imaging of the PL signal from every type of nanoparticles. Unmixing of acquired data allowed for multiplexing of the spectrally overlapping nanoprobes by their PL profile. Both quantitative and spatial distribution for every type of nanoparticles were obtained from their mixed suspensions. Finally, the SWIR HSI technique with unmixing protocol was applied to in vivo imaging of mice subcutaneously injected with PNPs and RENPs. The applicability of hyperspectral techniques to multiplex nanoprobes in the in vivo imaging was successfully demonstrated.
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Dean A, Peeperkorn L, Armstrong K, De Marie A, Watanabe Y, Tan M, Travers N. Prospective evaluation of FOLFIRINOX in Neo-adjuvant treatment of gastro-oesophageal junction carcinomas. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz155.301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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O'Sullivan B, Powell J, Lukowski S, Tan M, Hopkins P, Chambers D. Reconstruction of Transcriptional Programs of Monocyte to Macrophage Sequential Cell Fate Transition Using Single Cell RNA Sequencing in Sex Mis-Matched Lung Transplantation. J Heart Lung Transplant 2019. [DOI: 10.1016/j.healun.2019.01.375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Nguyen V, McCabe J, Mahr C, Jones T, Tan M, Cheng R, Dardas T, Masri S. The Effect of Right Ventricular Arterial Uncoupling on Mortality in Cardiogenic Shock. J Heart Lung Transplant 2019. [DOI: 10.1016/j.healun.2019.01.560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Wang X, Ho C, Tsatskis Y, Law J, Zhang Z, Zhu M, Dai C, Wang F, Tan M, Hopyan S, McNeill H, Sun Y. Intracellular manipulation and measurement with multipole magnetic tweezers. Sci Robot 2019; 4:4/28/eaav6180. [DOI: 10.1126/scirobotics.aav6180] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Accepted: 01/16/2019] [Indexed: 12/15/2022]
Abstract
The capability to directly interrogate intracellular structures inside a single cell for measurement and manipulation is important for understanding subcellular and suborganelle activities, diagnosing diseases, and developing new therapeutic approaches. Compared with measurements of single cells, physical measurement and manipulation of subcellular structures and organelles remain underexplored. To improve intracellular physical measurement and manipulation, we have developed a multipole magnetic tweezers system for micromanipulation involving submicrometer position control and piconewton force control of a submicrometer magnetic bead inside a single cell for measurement in different locations (spatial) and different time points (temporal). The bead was three-dimensionally positioned in the cell using a generalized predictive controller that addresses the control challenge caused by the low bandwidth of visual feedback from high-resolution confocal imaging. The average positioning error was quantified to be 0.4 μm, slightly larger than the Brownian motion–imposed constraint (0.31 μm). The system is also capable of applying a force up to 60 pN with a resolution of 4 pN for a period of time longer than 30 min. The measurement results revealed that significantly higher stiffness exists in the nucleus’ major axis than in the minor axis. This stiffness polarity is likely attributed to the aligned actin filament. We also showed that the nucleus stiffens upon the application of an intracellularly applied force, which can be attributed to the response of structural protein lamin A/C and the intracellular stress fiber actin filaments.
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Zhang L, Fang X, Li L, Liu R, Zhang C, Liu H, Tan M, Yang G. The association between circulating irisin levels and different phenotypes of polycystic ovary syndrome. J Endocrinol Invest 2018; 41:1401-1407. [PMID: 29785700 DOI: 10.1007/s40618-018-0902-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2018] [Accepted: 05/11/2018] [Indexed: 01/01/2023]
Abstract
PURPOSE The diagnosis of polycystic ovary syndrome (PCOS) is based on a combination of various clinical phenotypes in each patient. However, insulin resistance (IR) and dysmetabolism are not included in the diagnostic criteria of PCOS. Therefore, the definition of PCOS is controversial. The objective of this study is to investigate whether some PCOS phenotypes can be predicted by a circulating biomarker related to IR and metabolic dysfunction in PCOS women. METHODS One hundred and seventeen women with PCOS and 95 healthy women were recruited for this study. All individuals were assessed by the phenotypic and metabolic characteristics related to PCOS. A euglycemic-hyperinsulinemic clamp was performed to assess insulin sensitivity. Circulating irisin concentrations were determined with ELISA. RESULTS In our PCOS cohort, 65.8% of individuals were found to have hyperandrogenism. 83.8% had chronic oligoanovulation, and 80.3% of subjects showed polycystic ovaries. According to the diagnostic criteria of PCOS, 30.8% of PCOS subjects were diagnosed with the classic phenotype. In addition, 65.8% of PCOS women had insulin resistance. Serum irisin levels were significantly higher in PCOS women compared with healthy women. However, PCOS women with a normoandrogenic phenotype had similar circulating irisin levels as healthy women. PCOS women with the normoandrogenic phenotype had a low homeostasis model assessment of insulin resistance (HOMA-IR) and higher M-values than PCOS women with other phenotypes. Circulating irisin levels were associated with hyperandrogenism, but not with oligoanovulation or PCO morphology. CONCLUSIONS Circulating irisin may allow physicians to establish which women merit screening by a biomarker for PCOS.
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Dai W, Chen Z, Zuo J, Tan J, Tan M, Yuan Y. Risk factors of postoperative complications after emergency repair of incarcerated groin hernia for adult patients: a retrospective cohort study. Hernia 2018; 23:267-276. [PMID: 30421299 PMCID: PMC6456471 DOI: 10.1007/s10029-018-1854-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Accepted: 11/08/2018] [Indexed: 11/12/2022]
Abstract
Purpose This study aimed to explore risk factors of postoperative complications for adult patients with incarcerated groin hernia (IGH). Methods From January 2010 to December 2017, consecutive patients undergoing emergency hernia repair for IGH in our center were retrospectively reviewed. Postoperative complications, such as surgical site infection, seroma, hernia recurrence and mortality, were investigated, with risk factors for such complications analyzed using univariate and multivariate regressions. Results Sixty-four patients were included, with 51 males and 13 females (mean age 65.1, range 25–98 years). Ten patients (15.6%) underwent resection of necrotic bowel and anastomosis. 43 patients (67.2%) received open tension-free herniorrhaphy with polypropylene mesh, whereas the rest (32.8%) received herniorrhaphy without mesh. The overall postoperative complication rate was 40.6% (26/64), with an incisional complication rate of 31.2% (20/64) and an infection rate of 6.2% (4/64). At a median follow-up of 32 months, hernia recurrence and mortality were recorded in five cases each (7.8%). Mesh repair was associated with decreased recurrence rate compared with non-mesh repair (2.3% vs. 19.0%, p = 0.019). Diabetes mellitus (OR 8.611, 95%CI 1.292–57.405; p = 0.026) was an independent risk factor of postoperative complications, together with chronic obstructive pulmonary disease (COPD; OR 14.365, 95%CI 1.652–127.767, p = 0.016), intestinal necrosis (OR 14.260, 95%CI 1.079–188.460, p = 0.044), and general anesthesia (OR 14.543, 95%CI 1.682–125.711, p = 0.015) as risk for incisional complications after surgery. Conclusions Diabetes mellitus was an independent risk factor of postoperative complications for IGH, along with COPD, intestinal necrosis and general anesthesia associated with incisional complications. The use of polypropylene mesh did not increase infection or recurrence rate in this cohort.
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Tan M, Lang J, Feng M, Huang J, Li M. The DDR Gene Expression Profile in Cervical Cancer HeLa Cells Xenografted Tumors with Different Fractionated Doses of Irradiation. Int J Radiat Oncol Biol Phys 2018. [DOI: 10.1016/j.ijrobp.2018.07.615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Lee WQ, Tan VKM, Choo HMC, Ong J, Krishnapriya R, Khong S, Tan M, Sim YR, Tan BK, Madhukumar P, Yong WS, Ong KW. Factors influencing patient decision-making between simple mastectomy and surgical alternatives. BJS Open 2018; 3:31-37. [PMID: 30734013 PMCID: PMC6354187 DOI: 10.1002/bjs5.50105] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Accepted: 08/21/2018] [Indexed: 11/20/2022] Open
Abstract
Background Despite similar survival rates, breast‐conserving therapy (BCT) remains a distant second choice after simple mastectomy for patients with early‐stage breast cancer in Singapore. Uptake of reconstruction after mastectomy is also low (18 per cent). The aim of this study was to explore the factors influencing a patient's choice for mastectomy when eligible for BCT, and why patients decline reconstruction after mastectomy. Methods Patients from the National Cancer Centre Singapore, who were eligible for BCT but chose mastectomy without reconstruction, between December 2014 and December 2015 were included. An interviewer‐administered questionnaire focusing on patients' reasons for choosing mastectomy over BCT and not opting for immediate breast reconstruction after mastectomy was used. Tumour characteristics were retrieved from medical records. Spearman's rank correlation coefficient, Mann–Whitney U and Kruskal–Wallis tests were used to analyse the correlation between the patient's self‐rated influential factors and variables. Statistical significance was taken as P < 0·050. Results Ninety‐one patients were included (90·1 per cent response rate). The main reasons for choosing mastectomy over BCT were: fear of cancer recurrence (considered very important in 74 per cent), the perception that health outweighs breast retention (49 per cent) and the possibility of second surgery for margins (40 per cent). Key factors for rejecting immediate reconstruction after mastectomy were: patient‐perceived ‘old age’ (very important in 53 per cent), concern about two sites of surgery (42 per cent) and financial cost (29 per cent). Given a second chance, 19·8 per cent of patients would undergo BCT instead of mastectomy. Conclusion This study has identified the considerations that women in Singapore have when deciding on breast cancer surgery. Some perceptions need to be addressed for women to make a fully informed decision, especially as one‐fifth regret their initial choice.
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Bell A, Ezekowitz J, Tan M, Laflamme D, Goldin L, Leblanc K, Habert J, Lin P, Saunders K, Ngui D, Ng A, Desroches J, Goodman S. NON-VITAMIN K ANTAGONIST ORAL ANTICOAGULANT (NOAC) USE AND DOSING IN CANADIAN PRACTICE: INSIGHTS FROM THE OPTIMIZING PHARMACOTHERAPY IN THE MANAGEMENT APPROACH TO LOWERING RISK IN ATRIAL FIBRILLATION (OPTIMAL-AF) PROGRAM. Can J Cardiol 2018. [DOI: 10.1016/j.cjca.2018.07.125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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Tan M, Zhang S, Zhao Z, Wang A, Cheung D, Du P, Yu J, Jia S, Guo C, Tong Y, Zhou K. Circulating tumor DNA and RNA as an exploratory biomarker to evaluate GT0918 in a phase I/II clinical trial in mCRPC patients. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy269.162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Langer A, Wills C, Tan M, Spindler C, Goodman S, Lin P, Mancini G, Dufour R, Gregoire J, Leiter L. GUIDELINES ORIENTED APPROACH TO LIPID LOWERING (GOAL) MEDICAL PRACTICE ACTIVITY (MPA) TO ACHIEVE LOW DENSITY LIPOPROTEIN CHOLESTEROL (LDL-C) TARGETS. Can J Cardiol 2018. [DOI: 10.1016/j.cjca.2018.07.277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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Zou GM, Zhuo L, Tan M, Li WG. [Clinicopathologic features of lipoprotein glomerulopathy: observation of 6 cases]. ZHONGHUA YI XUE ZA ZHI 2018; 98:2910-2913. [PMID: 30293348 DOI: 10.3760/cma.j.issn.0376-2491.2018.36.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the clinicopathologic features of lipoprotein glomerulopathy (LPG). Methods: A total of 6 cases (5 males and 1 female, with a mean age of 27.5 years and age range of 11-53 years) of lipoprotein glomerulopathy with complete clinicopathologic data were enrolled. Except for light microscope, immunofluorescence and electron microscopic examination, renal biopsy tissues were checked by oil red O staining. The gene map of apolipoprotein E (ApoE) of 2 cases were analyzed. Results: All 6 cases presented with heavy proteinuria or nephrotic syndrome, and high level of low-density lipoprotein (LDL), very low-density lipoprotein (vLDL), ApoE. Family history of LPG was found in 3 cases, and 2 patients progressed to uremia, or even to death. Pathologic features showed that lipoprotein deposited in glomerulus capillary lumen and renal tubular epithelial cells. Gene analysis demonstrated that 2 cases expressed abnormal ApoE gene (162G>C and 455G>C). Conclusions: Lipoprotein glomerulopathy is autosomal-recessive disease with mutation of ApoE. Common clinical manifestations of LPG are heavy proteinuria or nephrotic syndrome, with a poor prognosis. Renal biopsy pathologic diagnosis can confirm this kidney disease. Emboli of lipoprotein being observed in glomerulus capillary lumen is the pathological feature of LPG.
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Shepard P, Akagi K, Everett S, Hassan I, Osborne A, Tan M, Schroth C, Aase D, Passi H, Proescher E, Greenstein J, Walters R, Krage M, Phan K. A - 66The Polytrauma Triad: Impact of PTSD Symptom Clusters on Cognitive Complaints in Post-9/11 Veterans. Arch Clin Neuropsychol 2018. [DOI: 10.1093/arclin/acy061.66] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Barac A, Lynce F, Medvedofsky DA, Geng X, Dang C, Yu A, Tan M, Isaacs C, Swain SM, Asch FM. P1578Global longitudinal strain in the SAFE-HEaRT study (Cardiac SAFEty of HER2 targeted therapy in patients with HER2 positive breast cancer and reduced left ventricular function). Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p1578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Sun C, Sun J, Tan M, Hu B, Gao X, Song J. Pain after root canal treatment with different instruments: A systematic review and meta-analysis. Oral Dis 2018. [DOI: 10.1111/odi.12854] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Tan M, Keenan B, Staley B, Anafi R, Schwab R, Schutte-Rodin S. 1083 Using an Electronic Health Record (EHR) to Identify Chronic CPAP Users with Abnormal HL7 CPAP Data. Sleep 2018. [DOI: 10.1093/sleep/zsy061.1082] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Jobanputra AM, Kritikou I, Ortiz L, Tan M, Simonsen S, Epelboim J. 0524 Factors Associated with Delayed Treatment of Patients with Severe Obstructive Sleep Apnea. Sleep 2018. [DOI: 10.1093/sleep/zsy061.523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Ren Y, Ye J, Xiong W, Zuo J, He Y, Tan M, Yuan Y. Adjuvant radiotherapy for positive lymph nodes of oesophageal squamous cell carcinoma: Can it earn promising benefits at long-term follow-up? Cancer Radiother 2018; 22:140-147. [PMID: 29454737 DOI: 10.1016/j.canrad.2017.09.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2017] [Revised: 08/29/2017] [Accepted: 09/08/2017] [Indexed: 12/22/2022]
Abstract
PURPOSE The value of adjuvant radiotherapy for patients with positive lymph nodes after curative resection of oesophageal squamous cell carcinoma is controversial. This study aims to investigate its long-term benefits in a specific cohort. PATIENTS AND METHODS The charts between 1990 and 2003 from patients with positive lymph nodes were retrospectively reviewed. Those subjects were divided into adjuvant radiotherapy and surgery alone groups, with two subgroups defined by radiation dose (cutoff value: 50Gy). Overall survival, disease-free survival and locoregional recurrence-free survival were compared between two groups, with predictive factors of overall survival analysed meanwhile. RESULTS In sum, 175 matched patients with 1:2 ratios for group balance were enrolled for final analysis. During the follow-up (median: 37.0 months), 143 (81.7%) deaths were recorded, with 70.6% of deaths from cancer progression. The median overall survival time (19.5, 4 to 172 months) was not significantly different between the two groups (18.9 vs. 20.0 months, P=0.179). However, the disease-free survival time was significantly shorter in the adjuvant radiotherapy group than that in the control group (median, 11.5 vs. 14.9 months; P=0.001), with the locoregional recurrence-free survival time impressively prolonged (median: 18.3 vs. 16.5 months; P=0.022). Age (P=0.030), number (P=0.005) and ratio (P=0.002) of positive lymph nodes were associated with overall survival, but radiation dose was not (P=0.204). CONCLUSION Adjuvant radiotherapy with low- or high-dose did not improve survival compared with surgery alone. However, radiotherapy was effective to control locoregional recurrence, and could be applied as salvage therapy when recurrence event occurred.
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Iqbal MA, Tan M, Krzczanowicz L, El-Taher AE, Forysiak W, Ania-Castañón JD, Harper P. Noise and transmission performance improvement of broadband distributed Raman amplifier using bidirectional Raman pumping with dual order co-pumps. OPTICS EXPRESS 2017; 25:27533-27542. [PMID: 29092224 DOI: 10.1364/oe.25.027533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Accepted: 10/12/2017] [Indexed: 06/07/2023]
Abstract
We demonstrate a low noise bidirectional broadband distributed Raman pumping scheme combining dual order co-propagated pumps without increasing the signal RIN level. The noise performance improvement is compared experimentally and numerically with conventional counter-pumping only and bidirectional pumping with only a 2nd order co-pump for a 70nm bandwidth and 61.5km distributed Raman amplifier. The proposed broadband pumping scheme shows 1.2dB maximum noise figure improvement and extends the long-haul transmission reach up to 6150km with a Q-factor improvement of ~0.7dB compared with counter-pumping only scheme.
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Stephens MFC, Tan M, Gordienko V, Harper P, Doran NJ. In-line and cascaded DWDM transmission using a 15dB net-gain polarization-insensitive fiber optical parametric amplifier. OPTICS EXPRESS 2017; 25:24312-24325. [PMID: 29041376 DOI: 10.1364/oe.25.024312] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Accepted: 09/18/2017] [Indexed: 06/07/2023]
Abstract
We demonstrate and characterize polarization-division multiplexed (PDM) DWDM data transmission for the first time in a range of systems incorporating a net-gain polarization-insensitive fiber optical parametric amplifier (PI-FOPA) for loss compensation. The PI-FOPA comprises a modified diversity-loop architecture to achieve 15dB net-gain, and up to 2.3THz (~18nm) bandwidth. Three representative systems are characterized using a 100Gb/s PDM-QPSK signal in conjunction with emulated DWDM neighbouring channels: (a) a 4x75km in-line fiber transmission system incorporating multiple EDFAs and a single PI-FOPA (b) N cascaded PI-FOPA amplification stages in an unlevelled Nx25km recirculating loop arrangement, with no EDFAs used within the loop signal path, and (c) M cascaded PI-FOPA amplification stages as part of an Mx75.6km gain-flattened recirculating loop system with the FOPA compensating for the transmission fiber loss, and EDFA compensation for loop switching and levelling loss. For the 4x75km in-line system (a), we transmit 45x50GHz-spaced signals ('equivalent' data-rate of 4.5Tb/s) with average OSNR penalty of 1.3dB over the band at 10-3 BER. For the unlevelled 'FOPA-only' 25.2km cascaded system (b), we report a maximum of eight recirculations for all 10x100GHz-spaced signals, and five recirculations for 20x50GHz-spaced signals. For the 75.6km levelled system
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