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Lerner A, Lee AJX, Yan H, Van Griethuysen J, Bartlett AD, Veli M, Jiang Y, Luong M, Naban N, Kane C, Conibear J, Papadatos-Pastos D, Ahmad T, Chao D, Anand G, Asghar US. A Multicentric, Retrospective, Real-world Study on Immune-related Adverse Events in Patients with Advanced Non-small Cell Lung Cancers Treated with Pembrolizumab Monotherapy. Clin Oncol (R Coll Radiol) 2024; 36:193-199. [PMID: 38246850 DOI: 10.1016/j.clon.2024.01.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Revised: 12/05/2023] [Accepted: 01/12/2024] [Indexed: 01/23/2024]
Abstract
AIMS We present 7 years of clinical experience with single-agent pembrolizumab immune checkpoint inhibitor immunotherapy in non-small cell lung cancers (NSCLC) from four UK cancer centres. MATERIALS AND METHODS This multi-institutional retrospective cohort study included 226 metastatic NSCLC patients. Outcomes were number and severity of immune-related adverse events (irAEs), median progression-free survival (mPFS) and median overall survival (mOS). RESULTS Within our cohort, 119/226 (53%) patients developed irAEs. Of these, 54/119 (45%) experienced irAEs affecting two or more organ systems. The most common irAEs were diarrhoea and rash. The development of an irAE was associated with better mOS (20.7 versus 8.0 months; P < 0.001) and mPFS (12.0 versus 3.9 months; P < 0.001). The development of grade 3/4 toxicities was associated with worse outcomes compared with the development of grade 1/2 toxicities (mOS 6.1 months versus 25.2 months, P < 0.01; mPFS 5.6 months versus 19.3 months, P = 0.01, respectively). Females had a higher proportion of reported grade 3/4 toxicities (13/44 [29.5%] versus 10/74 [13.5%], P = 0.03). Using a multiple Cox regression model, the presence of irAEs was associated with a better overall survival (hazard ratio = 0.42, 95% confidence interval 0.29-0.61; P < 0.01) and better PFS (hazard ratio 0.38, 95% confidence interval 0.27-0.53; P < 0.001). CONCLUSION In this multicentre retrospective cohort study, the development of at least one irAE was associated with significantly longer mPFS and mOS; however, more severe grade 3 and 4 irAEs were associated with worse outcomes. Delayed-onset irAEs, after the 3-month timepoint, were associated with better clinical outcomes.
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Affiliation(s)
- A Lerner
- North Middlesex University Hospital, London, UK
| | - A J X Lee
- UCL Cancer Institute, University College London, London, UK; University College London Hospitals NHS Foundation Trust, London, UK
| | - H Yan
- University College London Hospitals NHS Foundation Trust, London, UK
| | | | | | - M Veli
- University College London Hospitals NHS Foundation Trust, London, UK; Princess Alexandra Hospital, Harlow, UK
| | - Y Jiang
- University College London Hospitals NHS Foundation Trust, London, UK
| | - M Luong
- University College London Hospitals NHS Foundation Trust, London, UK
| | - N Naban
- North Middlesex University Hospital, London, UK
| | - C Kane
- Mount Vernon Cancer Centre, Northwood, UK
| | | | - D Papadatos-Pastos
- University College London Hospitals NHS Foundation Trust, London, UK; Princess Alexandra Hospital, Harlow, UK
| | - T Ahmad
- University College London Hospitals NHS Foundation Trust, London, UK
| | - D Chao
- Royal Free London Hospital, London, UK
| | - G Anand
- North Middlesex University Hospital, London, UK
| | - U S Asghar
- The Royal Marsden NHS Foundation Trust, Sutton, UK; Concr LTD, Cambridge, UK; Croydon University Hospital, Thornton Heath, UK.
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Chao D, Tran H, Hogan QH, Pan B. Analgesic dorsal root ganglion field stimulation blocks both afferent and efferent spontaneous activity in sensory neurons of rats with monosodium iodoacetate-induced osteoarthritis. Osteoarthritis Cartilage 2022; 30:1468-1481. [PMID: 36030058 PMCID: PMC9588581 DOI: 10.1016/j.joca.2022.08.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 08/03/2022] [Accepted: 08/18/2022] [Indexed: 02/02/2023]
Abstract
OBJECTIVES Chronic joint pain is common in patients with osteoarthritis (OA). Non-steroidal anti-inflammatory drugs and opioids are used to relieve OA pain, but they are often inadequately effective. Dorsal root ganglion field stimulation (GFS) is a clinically used neuromodulation approach, although it is not commonly employed for patients with OA pain. GFS showed analgesic effectiveness in our previous study using the monosodium iodoacetate (MIA) - induced OA rat pain model. This study was to evaluate the mechanism of GFS analgesia in this model. METHODS After osteoarthritis was induced by intra-articular injection of MIA, pain behavioral tests were performed. Effects of GFS on the spontaneous activity (SA) were tested with in vivo single-unit recordings from teased fiber saphenous nerve, sural nerve, and dorsal root. RESULTS Two weeks after intra-articular MIA injection, rats developed pain-like behaviors. In vivo single unit recordings from bundles teased from the saphenous nerve and third lumbar (L3) dorsal root of MIA-OA rats showed a higher incidence of SA than those from saline-injected control rats. GFS at the L3 level blocked L3 dorsal root SA. MIA-OA reduced the punctate mechanical force threshold for inducing AP firing in bundles teased from the L4 dorsal root, which reversed to normal with GFS. After MIA-OA, there was increased retrograde SA (dorsal root reflex), which can be blocked by GFS. CONCLUSIONS These results indicate that GFS produces analgesia in MIA-OA rats at least in part by producing blockade of afferent inputs, possibly also by blocking efferent activity from the dorsal horn.
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Affiliation(s)
- D Chao
- Department of Anesthesiology, Medical College of Wisconsin, 8701 W Watertown Plank Rd, Milwaukee, WI 53226, USA
| | - H Tran
- Department of Anesthesiology, Medical College of Wisconsin, 8701 W Watertown Plank Rd, Milwaukee, WI 53226, USA
| | - Q H Hogan
- Department of Anesthesiology, Medical College of Wisconsin, 8701 W Watertown Plank Rd, Milwaukee, WI 53226, USA
| | - B Pan
- Department of Anesthesiology, Medical College of Wisconsin, 8701 W Watertown Plank Rd, Milwaukee, WI 53226, USA.
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Evans R, Taylor S, Kalasthry J, Sakai N, Miles A, Aboagye A, Agoramoorthy L, Ahmed S, Amadi A, Anand G, Atkin G, Austria A, Ball S, Bazari F, Beable R, Beare S, Beedham H, Beeston T, Bharwani N, Bhatnagar G, Bhowmik A, Blakeway L, Blunt D, Boavida P, Boisfer D, Breen D, Bridgewater J, Burke S, Butawan R, Campbell Y, Chang E, Chao D, Chukundah S, Clarke C, Collins B, Collins C, Conteh V, Couture J, Crosbie J, Curtis H, Daniel A, Davis L, Desai K, Duggan M, Ellis S, Elton C, Engledow A, Everitt C, Ferdous S, Frow A, Furneaux M, Gibbons N, Glynne-Jones R, Gogbashian A, Goh V, Gourtsoyianni S, Green A, Green L, Green L, Groves A, Guthrie A, Hadley E, Halligan S, Hameeduddin A, Hanid G, Hans S, Hans B, Higginson A, Honeyfield L, Hughes H, Hughes J, Hurl L, Isaac E, Jackson M, Jalloh A, Janes S, Jannapureddy R, Jayme A, Johnson A, Johnson E, Julka P, Kalasthry J, Karapanagiotou E, Karp S, Kay C, Kellaway J, Khan S, Koh D, Light T, Limbu P, Lock S, Locke I, Loke T, Lowe A, Lucas N, Maheswaran S, Mallett S, Marwood E, McGowan J, Mckirdy F, Mills-Baldock T, Moon T, Morgan V, Morris S, Morton A, Nasseri S, Navani N, Nichols P, Norman C, Ntala E, Nunes A, Obichere A, O'Donohue J, Olaleye I, Oliver A, Onajobi A, O'Shaughnessy T, Padhani A, Pardoe H, Partridge W, Patel U, Perry K, Piga W, Prezzi D, Prior K, Punwani S, Pyers J, Rafiee H, Rahman F, Rajanpandian I, Ramesh S, Raouf S, Reczko K, Reinhardt A, Robinson D, Rockall A, Russell P, Sargus K, Scurr E, Shahabuddin K, Sharp A, Shepherd B, Shiu K, Sidhu H, Simcock I, Simeon C, Smith A, Smith D, Snell D, Spence J, Srirajaskanthan R, Stachini V, Stegner S, Stirling J, Strickland N, Tarver K, Teague J, Thaha M, Train M, Tulmuntaha S, Tunariu N, van Ree K, Verjee A, Wanstall C, Weir S, Wijeyekoon S, Wilson J, Wilson S, Win T, Woodrow L, Yu D. Patient deprivation and perceived scan burden negatively impact the quality of whole-body MRI. Clin Radiol 2020; 75:308-315. [PMID: 31836179 DOI: 10.1016/j.crad.2019.10.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 10/30/2019] [Indexed: 01/26/2023]
Abstract
AIM To evaluate the association between the image quality of cancer staging whole-body magnetic resonance imaging (WB-MRI) and patient demographics, distress, and perceived scan burden. MATERIALS AND METHODS A sample of patients recruited prospectively to multicentre trials comparing WB-MRI with standard scans for staging lung and colorectal cancer were invited to complete two questionnaires. The baseline questionnaire, administered at recruitment, collated data on demographics, distress and co-morbidity. The follow-up questionnaire, completed after staging investigations, measured perceived WB-MRI scan burden (scored 1 low to 7 high). WB-MRI anatomical coverage, and technical quality was graded by a radiographic technician and grading combined to categorise the scan as "optimal", "sub-optimal" or "degraded". A radiologist categorised 30 scans to test interobserver agreement. Data were analysed using the chi-square, Fisher's exact, t-tests, and multinomial regression. RESULTS One hundred and fourteen patients were included in the study (53 lung, 61 colorectal; average age 65.3 years, SD=11.8; 66 men [57.9%]). Overall, 45.6% (n=52), scans were classified as "optimal" quality, 39.5% (n=45) "sub-optimal", and 14.9% (n=17) as "degraded". In adjusted analyses, greater deprivation level and higher patient-reported scan burden were both associated with a higher likelihood of having a sub-optimal versus an optimal scan (odds ratio [OR]: 4.465, 95% confidence interval [CI]: 1.454 to 13.709, p=0.009; OR: 1.987, CI: 1.153 to 3.425, p=0.013, respectively). None of the variables predicted the likelihood of having a degraded scan. CONCLUSIONS Deprivation and patients' perceived experience of the WB-MRI are related to image quality. Tailored protocols and individualised patient management before and during WB-MRI may improve image quality.
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Kutsaev SV, Agustsson R, Berry R, Borland M, Chao D, Chimalpopoca O, Gavryushkin D, Gusarova M, Hartzell J, Meyer D, Nassiri A, Smirnov AY, Smith T, Sun Y, Verma A, Waldschmidt G, Zholents A. Thermionic microwave gun for terahertz and synchrotron light sources. Rev Sci Instrum 2020; 91:044701. [PMID: 32357711 DOI: 10.1063/5.0002765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Accepted: 03/14/2020] [Indexed: 06/11/2023]
Abstract
Conventional thermionic microwave and radio frequency (RF) guns can offer high average beam current, which is important for synchrotron light and terahertz (THz) radiation source facilities, as well as for industrial applications. For example, the Advanced Photon Source at Argonne National Laboratory is a national synchrotron-radiation light source research facility that utilizes thermionic RF guns. However, these existing thermionic guns are bulky, difficult to handle and install, easily detuned, very sensitive to thermal expansion, and due for a major upgrade and replacement. In this paper, we present the design of a new, more stable, and reliable gun with optimized electromagnetic performance, improved thermal engineering, and a more robust cathode mounting technique, which is a critical step to improve the performance of existing and future light sources, industrial accelerators, and electron beam-driven THz sources. We will also present a fabricated gun prototype and show results of high-power and beam tests.
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Affiliation(s)
- S V Kutsaev
- RadiaBeam Technologies, LLC, 1717 Stewart St., Santa Monica, California 90404, USA
| | - R Agustsson
- RadiaBeam Technologies, LLC, 1717 Stewart St., Santa Monica, California 90404, USA
| | - R Berry
- RadiaBeam Technologies, LLC, 1717 Stewart St., Santa Monica, California 90404, USA
| | - M Borland
- Argonne National Laboratory, 9700 S. Cass Ave., Lemont, Illinois 60439, USA
| | - D Chao
- RadiaBeam Technologies, LLC, 1717 Stewart St., Santa Monica, California 90404, USA
| | - O Chimalpopoca
- RadiaBeam Technologies, LLC, 1717 Stewart St., Santa Monica, California 90404, USA
| | - D Gavryushkin
- RadiaBeam Technologies, LLC, 1717 Stewart St., Santa Monica, California 90404, USA
| | - M Gusarova
- National Research Nuclear University "MEPhI," Kashirskoe sh. 31, Moscow 115409, Russia
| | - J Hartzell
- RadiaBeam Technologies, LLC, 1717 Stewart St., Santa Monica, California 90404, USA
| | - D Meyer
- Argonne National Laboratory, 9700 S. Cass Ave., Lemont, Illinois 60439, USA
| | - A Nassiri
- Argonne National Laboratory, 9700 S. Cass Ave., Lemont, Illinois 60439, USA
| | - A Yu Smirnov
- RadiaBeam Technologies, LLC, 1717 Stewart St., Santa Monica, California 90404, USA
| | - T Smith
- Argonne National Laboratory, 9700 S. Cass Ave., Lemont, Illinois 60439, USA
| | - Y Sun
- Argonne National Laboratory, 9700 S. Cass Ave., Lemont, Illinois 60439, USA
| | - A Verma
- RadiaBeam Technologies, LLC, 1717 Stewart St., Santa Monica, California 90404, USA
| | - G Waldschmidt
- Argonne National Laboratory, 9700 S. Cass Ave., Lemont, Illinois 60439, USA
| | - A Zholents
- Argonne National Laboratory, 9700 S. Cass Ave., Lemont, Illinois 60439, USA
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Corrie PG, Marshall A, Nathan PD, Lorigan P, Gore M, Tahir S, Faust G, Kelly CG, Marples M, Danson SJ, Marshall E, Houston SJ, Board RE, Waterston AM, Nobes JP, Harries M, Kumar S, Goodman A, Dalgleish A, Martin-Clavijo A, Westwell S, Casasola R, Chao D, Maraveyas A, Patel PM, Ottensmeier CH, Farrugia D, Humphreys A, Eccles B, Young G, Barker EO, Harman C, Weiss M, Myers KA, Chhabra A, Rodwell SH, Dunn JA, Middleton MR, Nathan P, Lorigan P, Dziewulski P, Holikova S, Panwar U, Tahir S, Faust G, Thomas A, Corrie P, Sirohi B, Kelly C, Middleton M, Marples M, Danson S, Lester J, Marshall E, Ajaz M, Houston S, Board R, Eaton D, Waterston A, Nobes J, Loo S, Gray G, Stubbings H, Gore M, Harries M, Kumar S, Goodman A, Dalgleish A, Martin-Clavijo A, Marsden J, Westwell S, Casasola R, Chao D, Maraveyas A, Marshall E, Patel P, Ottensmeier C, Farrugia D, Humphreys A, Eccles B, Dega R, Herbert C, Price C, Brunt M, Scott-Brown M, Hamilton J, Hayward RL, Smyth J, Woodings P, Nayak N, Burrows L, Wolstenholme V, Wagstaff J, Nicolson M, Wilson A, Barlow C, Scrase C, Podd T, Gonzalez M, Stewart J, Highley M, Wolstenholme V, Grumett S, Goodman A, Talbot T, Nathan K, Coltart R, Gee B, Gore M, Farrugia D, Martin-Clavijo A, Marsden J, Price C, Farrugia D, Nathan K, Coltart R, Nathan K, Coltart R. Adjuvant bevacizumab for melanoma patients at high risk of recurrence: survival analysis of the AVAST-M trial. Ann Oncol 2019; 29:1843-1852. [PMID: 30010756 PMCID: PMC6096737 DOI: 10.1093/annonc/mdy229] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Background Bevacizumab is a recombinant humanised monoclonal antibody to vascular endothelial growth factor shown to improve survival in advanced solid cancers. We evaluated the role of adjuvant bevacizumab in melanoma patients at high risk of recurrence. Patients and methods Patients with resected AJCC stage IIB, IIC and III cutaneous melanoma were randomised to receive either adjuvant bevacizumab (7.5 mg/kg i.v. 3 weekly for 1 year) or standard observation. The primary end point was detection of an 8% difference in 5-year overall survival (OS) rate; secondary end points included disease-free interval (DFI) and distant metastasis-free interval (DMFI). Tumour and blood were analysed for prognostic and predictive markers. Results Patients (n=1343) recruited between 2007 and 2012 were predominantly stage III (73%), with median age 56 years (range 18–88 years). With 6.4-year median follow-up, 515 (38%) patients had died [254 (38%) bevacizumab; 261 (39%) observation]; 707 (53%) patients had disease recurrence [336 (50%) bevacizumab, 371 (55%) observation]. OS at 5 years was 64% for both groups [hazard ratio (HR) 0.98; 95% confidence interval (CI) 0.82–1.16, P = 0.78). At 5 years, 51% were disease free on bevacizumab versus 45% on observation (HR 0.85; 95% CI 0.74–0.99, P = 0.03), 58% were distant metastasis free on bevacizumab versus 54% on observation (HR 0.91; 95% CI 0.78–1.07, P = 0.25). Forty four percent of 682 melanomas assessed had a BRAFV600 mutation. In the observation arm, BRAF mutant patients had a trend towards poorer OS compared with BRAF wild-type patients (P = 0.06). BRAF mutation positivity trended towards better OS with bevacizumab (P = 0.21). Conclusions Adjuvant bevacizumab after resection of high-risk melanoma improves DFI, but not OS. BRAF mutation status may predict for poorer OS untreated and potential benefit from bevacizumab. Clinical Trial Information ISRCTN 81261306; EudraCT Number: 2006-005505-64
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Affiliation(s)
- P G Corrie
- Cambridge Cancer Centre, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK.
| | - A Marshall
- Warwick Clinical Trials Unit, University of Warwick, Coventry, UK
| | - P D Nathan
- Medical Oncology, Mount Vernon Hospital, Northwood, UK
| | - P Lorigan
- Department of Medical Oncology, Christie Hospital, Manchester, UK
| | - M Gore
- Royal Marsden Hospital NHS Trust, London, UK
| | - S Tahir
- Oncology Research, Broomfield Hospital, Chelmsford, UK
| | - G Faust
- Oncology Department, Leicester Royal Infirmary, Leicester, UK
| | - C G Kelly
- Sir Bobby Robson Cancer Trials Research Centre, Freeman Hospital, Newcastle upon Tyne, UK
| | - M Marples
- Leeds Cancer Centre, St James's University Hospital, Leeds, UK
| | - S J Danson
- Weston Park Hospital, Academic Unit of Clinical Oncology, Sheffield, UK
| | - E Marshall
- Cancer & Palliative Care, St. Helen's Hospital, St. Helens, UK
| | - S J Houston
- Oncology Department, Royal Surrey County Hospital, Guildford, UK
| | - R E Board
- Rosemere Cancer Centre, Royal Preston Hospital, Preston, UK
| | - A M Waterston
- Clinical Trials Unit, Beatson WOS Cancer Centre, Glasgow, UK
| | - J P Nobes
- Department of Clinical Oncology, Norfolk & Norwich University Hospital, Norwich, UK
| | - M Harries
- Guy's & St. Thomas' Hospital, Guy's Cancer Centre, London, UK
| | - S Kumar
- Velindre Cancer Centre, Cardiff, UK
| | - A Goodman
- Exeter Oncology Centre, Royal Devon and Exeter Hospital, Exeter, UK
| | - A Dalgleish
- St George's Hospital, Cancer Centre, London, UK
| | | | - S Westwell
- Sussex Cancer Centre, Royal Sussex County Hospital, Brighton, UK
| | - R Casasola
- Cancer Centre, Ninewells Hospital, Dundee, UK
| | - D Chao
- Royal Free Hospital, London, UK
| | | | - P M Patel
- Academic Unit of Clinical Oncology, Nottingham University Hospitals NHS Trust, Nottingham, UK
| | - C H Ottensmeier
- CRUK and NIHR Southampton Experimental Cancer Medicine Centre, Southampton University Hospitals NHS Foundation Trust, Southampton, UK
| | - D Farrugia
- Oncology Centre, Cheltenham General Hospital, Cheltenham, UK
| | - A Humphreys
- Oncology Department, James Cook University Hospital, Middlesbrough, UK
| | - B Eccles
- Oncology Department, Poole Hospital, Dorset, UK
| | - G Young
- Cambridge Cancer Centre, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - E O Barker
- Cambridge Cancer Centre, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - C Harman
- Cambridge Cancer Centre, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - M Weiss
- Cambridge Cancer Centre, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - K A Myers
- Department of Oncology, University of Oxford, Oxford, UK; Experimental Cancer Medicine Centre, Oxford, UK
| | - A Chhabra
- Cambridge Cancer Centre, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | | | - J A Dunn
- Warwick Clinical Trials Unit, University of Warwick, Coventry, UK
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Corrie PG, Marshall A, Nathan PD, Lorigan P, Gore M, Tahir S, Faust G, Kelly CG, Marples M, Danson SJ, Marshall E, Houston SJ, Board RE, Waterston AM, Nobes JP, Harries M, Kumar S, Goodman A, Dalgleish A, Martin-Clavijo A, Westwell S, Casasola R, Chao D, Maraveyas A, Patel PM, Ottensmeier CH, Farrugia D, Humphreys A, Eccles B, Young G, Barker EO, Harman C, Weiss M, Myers KA, Chhabra A, Rodwell SH, Dunn JA, Middleton MR. Adjuvant bevacizumab for melanoma patients at high risk of recurrence: survival analysis of the AVAST-M trial. Ann Oncol 2019; 30:2013-2014. [PMID: 31430371 PMCID: PMC6938599 DOI: 10.1093/annonc/mdz237] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Lee KP, Wong C, Chan D, Kung K, Luk L, Wong MCS, Chao D, Leung V, Chan CW, Ko W, Leung TF, Chan YH, Fung HT, Lee MK, Wong SYS. Family medicine vocational training and career satisfaction in Hong Kong. BMC Fam Pract 2019; 20:139. [PMID: 31630674 PMCID: PMC6800987 DOI: 10.1186/s12875-019-1030-8] [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] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Accepted: 09/24/2019] [Indexed: 11/10/2022]
Abstract
BACKGROUND Postgraduate vocational training in family medicine (FM) is essential for physicians to build capacity and develop quality primary care. Inadequate standards in training and curriculum development can contribute to poor recruitment and retention of doctors in primary care. This study aimed to investigate: 1) the satisfaction level of doctors regarding vocational training in family medicine and associated demographics; and 2) the satisfaction level of doctors regarding their family medicine career and associated factors. METHOD This is a cross sectional study of all family medicine physicians across all government-funded primary care clinics (GOPCs). The study questionnaire consisted of items from a standardized and validated physician survey named the Physician Worklife Survey (PWS) (Konrad et al., Med Care, 1999). We selected three scales (7 items) relating to global job satisfaction, global career satisfaction and global specialty (family medicine) satisfaction with additional items on training and demographics. All significant variables in bivariate analyses were further examined using stepwise logistic regression. RESULTS Out of 424 eligible family medicine physicians, 368 physicians successfully completed the questionnaire. The response rate was 86.8%. Most participants were male (52.6%), were aged between 35 and 44 years (55.5%), were FM specialists (42.4%), graduated locally (86.2%), and had postgraduate qualifications. Eighty-two percent (82%) of participants were satisfied with their training. Having autonomy and protected time for training were associated with satisfaction with FM training. Satisfaction with family medicine as a career was correlated with physicians' satisfaction with their current job. Doctors who did not enroll in training (p < 0.001) and physicians who were older (p = 0.023) were significantly less satisfied. Stepwise multivariate regression showed that doctors who subjectively believed their training as "broad and in depth' had higher career satisfaction (p < 0.001). CONCLUSION Overall, the satisfaction level of physicians on current family medicine training in Hong Kong was high. Having autonomy and protected time for training is associated with higher training satisfaction levels. Perceiving FM training as "broad and in-depth" is associated with higher family medicine career satisfaction.
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Affiliation(s)
- K P Lee
- JC School of Public Health and Primary Care, The Chinese University of Hong Kong, Sha Tin, Hong Kong
| | - C Wong
- JC School of Public Health and Primary Care, The Chinese University of Hong Kong, Sha Tin, Hong Kong.
| | - D Chan
- JC School of Public Health and Primary Care, The Chinese University of Hong Kong, Sha Tin, Hong Kong
| | - K Kung
- JC School of Public Health and Primary Care, The Chinese University of Hong Kong, Sha Tin, Hong Kong
| | - L Luk
- JC School of Public Health and Primary Care, The Chinese University of Hong Kong, Sha Tin, Hong Kong
| | - M C S Wong
- JC School of Public Health and Primary Care, The Chinese University of Hong Kong, Sha Tin, Hong Kong
| | - D Chao
- Hospital Authority, Hospital Authority Building, 147B Argyle Street, Kowloon, Hong Kong
| | - V Leung
- Hospital Authority, Hospital Authority Building, 147B Argyle Street, Kowloon, Hong Kong
| | - C W Chan
- Hospital Authority, Hospital Authority Building, 147B Argyle Street, Kowloon, Hong Kong
| | - W Ko
- Hospital Authority, Hospital Authority Building, 147B Argyle Street, Kowloon, Hong Kong
| | - T F Leung
- Hospital Authority, Hospital Authority Building, 147B Argyle Street, Kowloon, Hong Kong
| | - Y H Chan
- Hospital Authority, Hospital Authority Building, 147B Argyle Street, Kowloon, Hong Kong
| | - H T Fung
- Hospital Authority, Hospital Authority Building, 147B Argyle Street, Kowloon, Hong Kong
| | - M K Lee
- Hospital Authority, Hospital Authority Building, 147B Argyle Street, Kowloon, Hong Kong
| | - S Y S Wong
- JC School of Public Health and Primary Care, The Chinese University of Hong Kong, Sha Tin, Hong Kong
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Yan H, Jiang Y, Luong M, Naban N, Kane C, Conibear J, Papadatos-Pastos D, Ahmad T, Chao D, Asghar U, Anand G. Delayed onset immune related adverse effects (IRAEs) of pembrolizumab in non-small cell lung cancer. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz260.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Cates A, Lin R, Mayberry A, Clark R, Chao D, Taylor T, Stray-Gundersen J, Wingeier B. Repeated sessions of transcranial direct current stimulation (tDCS) with vertical jump training improves vertical jump performance in elite athletes. Brain Stimul 2019. [DOI: 10.1016/j.brs.2018.12.854] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Purcell J, Hickson J, Tanlimco S, Fox M, Chao D, Hsi E, Sho M, Powers R, Foster-Duke K, McGonigal T, Uziel T, Kumar S, Samayoa J, Longenecker K, Lai D, Hollenbaugh D, Afar D, Iyer S, Morgan-Lappe S, Gish K. ABBV-085 is a novel antibody–drug conjugate (ADC) that targets LRRC15 in the tumor microenvironment. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)32622-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Chao D, Nguyen MH. Letter: apoptosis and hepatic fibrosis in chronic hepatitis B--authors' reply. Aliment Pharmacol Ther 2014; 39:997. [PMID: 24689348 DOI: 10.1111/apt.12715] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Accepted: 02/28/2014] [Indexed: 12/08/2022]
Affiliation(s)
- D Chao
- Department of Medicine, University of Pittsburg Medical Center, Pittsburg, PA, USA
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Chao D, Halstead S, Halloran M, Longini I. A mathematical model for the control of dengue using vaccines. Int J Infect Dis 2012. [DOI: 10.1016/j.ijid.2012.05.985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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Chao D, Dongmei W, Junxia L, Leisheng R, Yali W. Effect of statin therapy on reperfusion arrhythmia in AMI patients who underwent successful primary angioplasty. Heart 2011. [DOI: 10.1136/heartjnl-2011-300867.538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Chao D, Dongmei W, Junxia L, Leisheng R, Yali W. The short-term effects of pre-treatment of statins on reperfusion and short-term clinical prognosis after percutanous coronary intervention in patients with non-ST-segment elevation acute coronary syndrome. Heart 2011. [DOI: 10.1136/heartjnl-2011-300867.422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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16
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Lo YYC, Lam CLK, Mercer SW, Fong DYT, Lee A, Lam TP, Lee R, Chiu B, Tang J, Chui B, Chao D, Lam A, Chan K. Patient morbidity and management patterns of community-based primary health care services in Hong Kong. Hong Kong Med J 2011; 17:33-37. [PMID: 21673358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023] Open
Affiliation(s)
- Y Y C Lo
- Family Medicine Unit, The University of Hong Kong, Hong Kong SAR, China.
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Yujie G, Fanrong L, Chao D, Lei L, Mingkai D, Taipin G, Mailan L. Case: A 24-year-old woman with primary nocturnal enuresis and moderate depression. Eur J Integr Med 2010. [DOI: 10.1016/j.eujim.2010.09.115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Xianghua F, Chao D, Weize F, Xinshun G, Weili W, Shiqiang L, Guozhen H, Yunfa J. e0648 Effects of pretreatment with simvastatin on the area of myocardial infarction in reperfusion injury rabbits after acute myocardial infarction. Heart 2010. [DOI: 10.1136/hrt.2010.208967.648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Chen KH, Chao D, Liu CF, Chen CF, Wang D. Ischemia and reperfusion of the lung tissues induced increase of lung permeability and lung edema is attenuated by dimethylthiourea (PP69). Transplant Proc 2010; 42:748-50. [PMID: 20430163 DOI: 10.1016/j.transproceed.2010.03.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
This study sought to determine whether oxygen radical scavengers of dimethylthiourea (DMTU), superoxide dismutase (SOD), or catalase (CAT) pretreatment attenuated ischemia-reperfusion (I/R)-induced lung injury. After isolation from a Sprague-Dawley rat, the lungs were perfused through the pulmonary artery cannula with rat whole blood diluted 1:1 with a physiological salt solution. An acute lung injury was induced by 10 minutes of hypoxia with 5% CO2-95% N2 followed by 65 minutes of ischemia and then 65 minutes of reperfusion. I/R significantly increased microvascular permeability as measured by the capillary filtration coefficient (Kfc), lung weight-to-body weight ratio (LW/BW), and protein concentration in bronchoalveolar lavage fluid (PCBAL). DMTU pretreatment significantly attenuated the acute lung injury. The capillary filtration coefficient (P<.01), LW/BW (P<.01) and PCBAL (P<.05) were significantly lower among the DMTU-treated rats than hosts pretreated with SOD or CAT. The possible mechanisms of the protective effect of DMTU in I/R-induced lung injury may relate to the permeability of the agent allowing it to scavenge intracellular hydroxyl radicals. However, whether superoxide dismutase or catalase antioxidants showed protective effects possibly due to their impermeability of the cell membrane not allowing scavenging of intracellular oxygen radicals.
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Affiliation(s)
- K H Chen
- Department of Nursing and Management, Jen-Teh Junior College of Medicine, Miouli County, Taiwan
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Culp P, Choi D, Yin J, Tan S, Chao D, Su M, Sho M, Steinle R, Hsi E, Ramakrishnan V. 508 POSTER PDL192, a novel, humanized antibody to TWEAK receptor, shows potent anti-tumor activity in preclinical models. EJC Suppl 2008. [DOI: 10.1016/s1359-6349(08)72442-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Lorigan P, Corrie P, Chao D, Nathan P, Ahmad T, Marais R, Burk K, Erlandsson F, Gore M, Eisen T. Phase II trial of sorafenib combined with dacarbazine in metastatic melanoma patients. J Clin Oncol 2006. [DOI: 10.1200/jco.2006.24.18_suppl.8012] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
8012 Background: Sorafenib inhibits tumor cell proliferation and angiogenesis through blockade of multiple kinases including Raf, VEGFR-2/-3, and PDGFR-β. In Phase I/II trials, sorafenib was generally well tolerated as a monotherapy or in combination with other agents. A Phase I study in combination with dacarbazine (DTIC) showed encouraging activity, which warranted this Phase II study. Methods: This multi-center, open-label, two-stage (30 patients in Stage 1; 52 in Stage 2), uncontrolled Phase II trial was performed to evaluate the primary endpoints of efficacy (according to RECIST) and tolerability of sorafenib in combination with DTIC in patients with advanced metastatic melanoma. Eligibility criteria included ECOG 0 or 1, life expectancy ≥12 weeks, adequate bone marrow, liver, and renal function. Oral sorafenib 400 mg twice daily (bid) was administered with repeated 3-week cycles of DTIC 1000 mg/m2. Results: At this interim end of Stage 1 analysis, 30 patients with metastatic melanoma had been treated (median age 61 years [range 30–78]; 73.3% male; 96.7% white). Five (16.7%) patients had PR as best response (two confirmed, three currently unconfirmed), 13 (43.3%) had SD, 10 (33.3%) had PD, and two (6.7%) were unevaluable for tumor response. The patients with confirmed PR continue on study drug at 6.4 months. Median progression-free survival for all patients was 3.6 months (range 0.9–6.1 months). The most frequently reported drug-related adverse events (AEs) were dermatologic (rash/desquamation [43%], hand-foot skin reaction [HFS, 33%]); gastrointestinal (constipation [47%], nausea [37%], diarrhea [27%]); constitutional (fatigue [43%]); and blood/bone marrow (neutrophils [40%], platelets [30%]). The most common grade 3/4 drug-related AEs were blood/bone marrow (neutrophils [23%], platelets [17%]), and fatigue (7%), while HFS and hypertension were observed in <5%. Conclusions: Continuous sorafenib 400 mg bid is generally well tolerated and shows promising preliminary anti-tumor activity in combination with DTIC. No toxicities were observed above those expected from either agent alone. Updated results will be presented, including the decision whether to proceed to Stage 2 of the study. [Table: see text]
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Affiliation(s)
- P. Lorigan
- Christie Hospital NHS Trust, Manchester, United Kingdom; Addenbrooke’s Hospital, Cambridge, United Kingdom; Royal Free Hospital, London, United Kingdom; Mount Vernon Hospital, Middlesex, United Kingdom; Royal Marsden Hospital, London, United Kingdom; Bayer Pharmaceuticals, West Haven, CT; Bayer AB, Gothenburg, Sweden
| | - P. Corrie
- Christie Hospital NHS Trust, Manchester, United Kingdom; Addenbrooke’s Hospital, Cambridge, United Kingdom; Royal Free Hospital, London, United Kingdom; Mount Vernon Hospital, Middlesex, United Kingdom; Royal Marsden Hospital, London, United Kingdom; Bayer Pharmaceuticals, West Haven, CT; Bayer AB, Gothenburg, Sweden
| | - D. Chao
- Christie Hospital NHS Trust, Manchester, United Kingdom; Addenbrooke’s Hospital, Cambridge, United Kingdom; Royal Free Hospital, London, United Kingdom; Mount Vernon Hospital, Middlesex, United Kingdom; Royal Marsden Hospital, London, United Kingdom; Bayer Pharmaceuticals, West Haven, CT; Bayer AB, Gothenburg, Sweden
| | - P. Nathan
- Christie Hospital NHS Trust, Manchester, United Kingdom; Addenbrooke’s Hospital, Cambridge, United Kingdom; Royal Free Hospital, London, United Kingdom; Mount Vernon Hospital, Middlesex, United Kingdom; Royal Marsden Hospital, London, United Kingdom; Bayer Pharmaceuticals, West Haven, CT; Bayer AB, Gothenburg, Sweden
| | - T. Ahmad
- Christie Hospital NHS Trust, Manchester, United Kingdom; Addenbrooke’s Hospital, Cambridge, United Kingdom; Royal Free Hospital, London, United Kingdom; Mount Vernon Hospital, Middlesex, United Kingdom; Royal Marsden Hospital, London, United Kingdom; Bayer Pharmaceuticals, West Haven, CT; Bayer AB, Gothenburg, Sweden
| | - R. Marais
- Christie Hospital NHS Trust, Manchester, United Kingdom; Addenbrooke’s Hospital, Cambridge, United Kingdom; Royal Free Hospital, London, United Kingdom; Mount Vernon Hospital, Middlesex, United Kingdom; Royal Marsden Hospital, London, United Kingdom; Bayer Pharmaceuticals, West Haven, CT; Bayer AB, Gothenburg, Sweden
| | - K. Burk
- Christie Hospital NHS Trust, Manchester, United Kingdom; Addenbrooke’s Hospital, Cambridge, United Kingdom; Royal Free Hospital, London, United Kingdom; Mount Vernon Hospital, Middlesex, United Kingdom; Royal Marsden Hospital, London, United Kingdom; Bayer Pharmaceuticals, West Haven, CT; Bayer AB, Gothenburg, Sweden
| | - F. Erlandsson
- Christie Hospital NHS Trust, Manchester, United Kingdom; Addenbrooke’s Hospital, Cambridge, United Kingdom; Royal Free Hospital, London, United Kingdom; Mount Vernon Hospital, Middlesex, United Kingdom; Royal Marsden Hospital, London, United Kingdom; Bayer Pharmaceuticals, West Haven, CT; Bayer AB, Gothenburg, Sweden
| | - M. Gore
- Christie Hospital NHS Trust, Manchester, United Kingdom; Addenbrooke’s Hospital, Cambridge, United Kingdom; Royal Free Hospital, London, United Kingdom; Mount Vernon Hospital, Middlesex, United Kingdom; Royal Marsden Hospital, London, United Kingdom; Bayer Pharmaceuticals, West Haven, CT; Bayer AB, Gothenburg, Sweden
| | - T. Eisen
- Christie Hospital NHS Trust, Manchester, United Kingdom; Addenbrooke’s Hospital, Cambridge, United Kingdom; Royal Free Hospital, London, United Kingdom; Mount Vernon Hospital, Middlesex, United Kingdom; Royal Marsden Hospital, London, United Kingdom; Bayer Pharmaceuticals, West Haven, CT; Bayer AB, Gothenburg, Sweden
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Nathan P, Chao D, Brock C, Savage P, Harries M, Gore M, Eisen T. The place of VEGF inhibition in the current management of renal cell carcinoma. Br J Cancer 2006; 94:1217-20. [PMID: 16508632 PMCID: PMC2361396 DOI: 10.1038/sj.bjc.6603025] [Citation(s) in RCA: 15] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2005] [Revised: 01/31/2006] [Accepted: 02/01/2006] [Indexed: 01/18/2023] Open
Abstract
Vascular endothelial growth factor (VEGF) is overexpressed in around 80% of patients with clear cell carcinoma of the kidney owing to the inactivation of von Hippel Lindau gene activity. VEGF stimulates angiogenesis and acts as an autocrine growth factor. A number of different agents are now available which target VEGF and its signalling pathways. A significant body of evidence has accumulated demonstrating that antagonism of VEGF and its downstream pathways is clinically useful in a significant proportion of patients with metastatic clear cell carcinoma of the kidney. Enough data is now available to recommend that patients with metastatic clear cell carcinoma of the kidney should at some point during the course of their disease be offered entry into a clinical trial enabling exposure to a targeted inhibitor of VEGF or its signalling pathways. Assuming early clinical trial data is substantiated by ongoing registration studies, efforts should be made to minimise the time taken between licensing and general availability of these active agents.
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Affiliation(s)
- P Nathan
- Mount Vernon Cancer Centre, Rickmansworth Road, Northwood, Middlesex, HA6 2RN, UK.
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Nathan P, Eisen T, Gore M, Chao D, Kotwinski P, Hawe E, Hubbart C, Payne J, Montgomery H. Frequency of IL-6 -174, VEGF -460 and VEGF +405 single nucleotide polymorphisms in a population of renal cell carcinoma patients. J Clin Oncol 2005. [DOI: 10.1200/jco.2005.23.16_suppl.4688] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- P. Nathan
- Mount Vernon Cancer Ctr, London, United Kingdom; Royal Marsden Hosp, London, United Kingdom; Royal Free Hosp, London, United Kingdom; Univ Coll London, London, United Kingdom
| | - T. Eisen
- Mount Vernon Cancer Ctr, London, United Kingdom; Royal Marsden Hosp, London, United Kingdom; Royal Free Hosp, London, United Kingdom; Univ Coll London, London, United Kingdom
| | - M. Gore
- Mount Vernon Cancer Ctr, London, United Kingdom; Royal Marsden Hosp, London, United Kingdom; Royal Free Hosp, London, United Kingdom; Univ Coll London, London, United Kingdom
| | - D. Chao
- Mount Vernon Cancer Ctr, London, United Kingdom; Royal Marsden Hosp, London, United Kingdom; Royal Free Hosp, London, United Kingdom; Univ Coll London, London, United Kingdom
| | - P. Kotwinski
- Mount Vernon Cancer Ctr, London, United Kingdom; Royal Marsden Hosp, London, United Kingdom; Royal Free Hosp, London, United Kingdom; Univ Coll London, London, United Kingdom
| | - E. Hawe
- Mount Vernon Cancer Ctr, London, United Kingdom; Royal Marsden Hosp, London, United Kingdom; Royal Free Hosp, London, United Kingdom; Univ Coll London, London, United Kingdom
| | - C. Hubbart
- Mount Vernon Cancer Ctr, London, United Kingdom; Royal Marsden Hosp, London, United Kingdom; Royal Free Hosp, London, United Kingdom; Univ Coll London, London, United Kingdom
| | - J. Payne
- Mount Vernon Cancer Ctr, London, United Kingdom; Royal Marsden Hosp, London, United Kingdom; Royal Free Hosp, London, United Kingdom; Univ Coll London, London, United Kingdom
| | - H. Montgomery
- Mount Vernon Cancer Ctr, London, United Kingdom; Royal Marsden Hosp, London, United Kingdom; Royal Free Hosp, London, United Kingdom; Univ Coll London, London, United Kingdom
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McCabe DJH, Turner NC, Chao D, Leff A, Gregson NA, Womersley HJ, Mak I, Perkin GD, Schapira AHV. Paraneoplastic "stiff person syndrome" with metastatic adenocarcinoma and anti-Ri antibodies. Neurology 2004; 62:1402-4. [PMID: 15111682 DOI: 10.1212/01.wnl.0000123694.64121.d5] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.7] [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: 11/15/2022] Open
Abstract
A 43-year-old woman presented with clinical and electrophysiologic features of stiff person syndrome (SPS), without abdominal or lumbar paraspinal muscle involvement. Investigations revealed metastatic adenocarcinoma of the lung with positive anti-Ri antibodies. Her clinical condition improved with diazepam, baclofen, tizanidine, and palliative chemotherapy. Screening for an underlying malignancy and anti-Ri antibodies should be considered in patients with SPS when clinical presentation is atypical.
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Affiliation(s)
- D J H McCabe
- University Department of Clinical Neurosciences, Royal Free and University College, Medical School, London, UK.
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Shanbhag M, Chao D, Rutstein R, Hodinka R, Zaoutis T. BASELINE ANTIRETROVIRAL RESISTANCE IN PERINATALLY HIV-INFECTED CHILDREN. J Investig Med 2003. [DOI: 10.1136/jim-51-06-25] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Qiu D, Son G, Dhir VK, Chao D, Logsdon K. Dynamics of single and multiple bubbles and associated heat transfer in nucleate boiling under low gravity conditions. Ann N Y Acad Sci 2002; 974:378-97. [PMID: 12446337 DOI: 10.1111/j.1749-6632.2002.tb05920.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Experimental studies and numerical simulation of growth and lift-off processes of single bubbles formed on designed nucleation sites have been conducted under low-gravity conditions. Merging of multiple bubbles and lift-off processes during boiling of water in the parabola flights of KC-135 aircraft were also experimentally studied. The heating area of the flat heater surface was discretized and equipped with a number of small heating elements that were separately powered in the temperature-control mode. As such, the wall superheat remained nearly constant during the growth and departure of the bubbles, whereas the local heat flux varied during the boiling process. From numerical calculation it is found that peak of heat flux occurs locally at the contact line of bubble and heater surface. Dry conditions exist inside the bubble base area, which is characterized through a zero heat flux region in the numerical calculation and a lower heat flux period in the experimental results. During the merger of multiple bubbles, dry-out continues. In both the numerical calculations and experimental results, the bubble lift-off is associated with an apparent increase in heat flux. Wall heat flux variation with time and spatial distribution during the growth of a single bubble from numerical simulations are compared with experimental data.
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Affiliation(s)
- D Qiu
- Department of Mechanical and Aerospace Engineering, University of California at Los Angeles, 90095-1597,USA
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Chao D. Book: Tobacco: A Global Threat. West J Med 2002. [DOI: 10.1136/bmj.325.7360.395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Naughton MJ, Herndon JE, Shumaker SA, Miller AA, Kornblith AB, Chao D, Holland J. The health-related quality of life and survival of small-cell lung cancer patients: results of a companion study to CALGB 9033. Qual Life Res 2002; 11:235-48. [PMID: 12074261 DOI: 10.1023/a:1015257121369] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.1] [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: 11/12/2022]
Abstract
The purposes of this study were 2-fold: to evaluate the impact of the schedule dependency of etoposide (3-day IV short course vs. a 21-day oral prolonged course) with cisplatin on the quality of life of small-cell lung cancer (SCLC) patients; and to examine the effect of baseline quality of life variables on long-term survival, after adjustment for known demographic and clinical prognostic factors. Participants were 70 patients enrolled in the cancer and leukemia group B (CALGB) protocol 9033. Quality of life was assessed at baseline, 6 and 12 weeks by: the EORTC QLQ-30, the Centers for epidemiology studies--Depression short form, the medical outcomes study (MOS) social support questionnaire, and a scale of sleep quality. Contrary to expectations, study results suggested no significant differences in the patients' life quality and treatment response based on whether they received etoposide in a 3-day IV vs. a 21-day oral regimen. The use of the baseline variables in predicting overall survival indicated that patients who were non-white and with liver involvement had decreased survival. Brain involvement, being male, and higher depressive symptoms were also found to be borderline significant in predicting decreased survival in this patient population.
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Affiliation(s)
- M J Naughton
- Wake Forest University School of Medicine, Winston-Salem, NC 27157-1063, USA.
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Chao D, Remi G. Helicobacter pylori: an update and a practical approach. J La State Med Soc 2001; 153:540-6. [PMID: 11789856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
Infections with Helicobacter pylori are very common throughout the world, occurring in 40% to 50% of the population in developed countries and in 80% to 90% of the population in developing regions. Helicobacter pylori is now recognized as a major cause of gastritis and peptic ulcer disease; it has been implicated as a cause of gastric mucosa-associated lymphoid-tissue lymphomas, and it increases the risk of gastric adenocarcinoma in chronic carriers. Eradication of Helicobacter pylori has been shown to decrease ulcer recurrence and, in some cases, is associated with regression of the gastric mucosa-associated lymphoid-tissue lymphoma. Helicobacter pylori infection has been classified as a category 1 carcinogen by the World Health Organization. Treatment should be offered if the infection is detected. It is important for primary care physicians to clearly understand when and how to test and how to select appropriate therapy for Helicobacter pylori infection.
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Affiliation(s)
- D Chao
- Department of Family Medicine, Louisiana State University Health Sciences Center, Monroe, USA
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Zisman A, Pantuck AJ, Chao D, Dorey F, Said JW, Gitlitz BJ, de Kernion JB, Figlin RA, Belldegrun AS. Reevaluation of the 1997 TNM classification for renal cell carcinoma: T1 and T2 cutoff point at 4.5 rather than 7 cm. better correlates with clinical outcome. J Urol 2001; 166:54-8. [PMID: 11435822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
PURPOSE We analyzed the effects of the change in TNM classification from the 1987 to the 1997 version and suggest a modified tumor size cutoff point between T stages 1 and 2 for renal cell carcinoma. MATERIALS AND METHODS We evaluated a database containing the records of 661 patients who underwent nephrectomy between 1989 and 1999. The effect of the change in TNM classification on the distribution of patients between stages, the rates of M+ and N+ disease, and the local and distant recurrence rates were outlined for 280 patients with T stages 1 and 2 disease. The Cox model was used to identify the optimal cutoff point between T1 and T2 disease, and the resulting effect of adopting this cutoff was outlined. RESULTS A total of 174 and 128 cases were down staged from 1987 version stage T2 to 1997 version stage T1 and from 1987 TNM stage II to 1997 TNM stage I, respectively. Survival was not significantly different in patients with 1997 TNM stages I and II disease due to a lack of survival difference during the first 2 years of followup. Stage shift also caused an increase in average tumor size, the proportion of patients with high grade cancer, and M+ and N+ disease at diagnosis in 1997 stages T1 and T2 as well as an increase in the proportion of 1997 stage T2N0M0 cases at diagnosis with systemic failure. Analysis of 11 potential cutoff points between 1 and 10 cm. revealed that 4.5 cm. was most predictive of patients survival (hazards ratio 4.99, p = 0.0001). Using this cutoff resulted in improved discriminatory power of the TNM classification and a moderating effect on the distribution of patients, average tumor size, high grade disease, M+ and N+ disease at diagnosis, and systemic failure between T(14.5) and T(24.5) compared with 1997 T1 and T2. CONCLUSIONS Our data imply that the current cutoff point of 7 cm. between stages T1 and T2 tumors is too high. Lowering the cutoff to 4.5 cm. resulted in better discriminatory power of the TNM classification in our dataset. This observation should be further validated by external data.
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Affiliation(s)
- A Zisman
- Division of Urologic Oncology, Department of Urology, University of California School of Medicine, Los Angeles, California, USA
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Espeland MA, Kumanyika S, Wilson AC, Wilcox S, Chao D, Bahnson J, Reboussin DM, Easter L, Zheng B. Lifestyle interventions influence relative errors in self-reported diet intake of sodium and potassium. Ann Epidemiol 2001; 11:85-93. [PMID: 11164124 DOI: 10.1016/s1047-2797(00)00173-3] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [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: 11/26/2022]
Abstract
PURPOSE To characterize the distribution of errors in self-reported sodium and potassium dietary intakes relative to more objective urine measures among participants receiving lifestyle interventions. METHODS We analyzed longitudinal data from 900 individuals with hypertension who had been enrolled in a randomized controlled clinical trial to establish whether usual care or three lifestyle interventions (weight loss, sodium reduction, and combined weight loss and sodium reduction) could effectively substitute for phamacotherapy. Repeated standardized 24-hour diet recalls and 24-hour urine collections were collected over up to three years of follow-up to estimate sodium and potassium intakes. By contrasting self-reported and urine-based sodium and potassium data collected before and during interventions, we examined the relative impact of intervention assignment on estimated intakes, repeatability, and multivariate measurement error. RESULTS Relative to urine-based measures, mean self-reported sodium intakes were biased about 10% lower among participants assigned to combined weight loss and sodium reduction, but were unaffected by the other interventions. The repeatability of self-report measures increased slightly with time, particularly among participants assigned to sodium interventions. Errors in self-reported sodium and potassium intakes were correlated before the start of the intervention, but became uncorrelated among individuals assigned to sodium restriction interventions. CONCLUSIONS Lifestyle interventions may influence not only diet intake, but also the measurement of diet intake.
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Affiliation(s)
- M A Espeland
- Department of Public Health Sciences, Wake Forest University School of Medicine, Winston-Salem, NC 27157, USA
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Freedland SJ, Chao D, Pantuck AJ, Zisman A, Belldegrun AS. Rethinking staging and treatment for renal cell cancer. Rev Urol 2001; 3:162-3. [PMID: 16985713 PMCID: PMC1476054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
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Chao D, Freedland SJ, Pantuck AJ, Zisman A, Belldegrun AS. Bladder cancer 2000: molecular markers for the diagnosis of transitional cell carcinoma. Rev Urol 2001; 3:85-93. [PMID: 16985695 PMCID: PMC1476038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
The search continues for better tumor markers to improve the rate of detection of transitional cell carcinoma (TCC) more quickly in larger populations and to predict the possibility of disease recurrence. Among several new tests currently being screened, telomerase and hyaluronic acid/hyaluronidase (HA/HAase) have shown sensitivity and specificity equal to or better than cytology, and other promising tumor markers are being investigated. Although no marker has yet replaced the need to perform cystoscopy and cytology, the new tests can minimize the cost and difficulty of screening and long-term surveillance of patients who have or are at risk for bladder cancer.
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Freedland SJ, Chao D, Pantuck AJ, Zisman A, Belldegrun AS. Determining the optimal treatment for advanced bladder cancer. Rev Urol 2001; 3:159-62. [PMID: 16985712 PMCID: PMC1476051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
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Abstract
We report the color Doppler sonographic features in a case of hemangiopericytoma of the thigh in a 52-year-old woman. Color Doppler sonography demonstrated the vascularity of the tumor, and spectral analysis showed waveform changes that suggested the presence of intratumoral arteriovenous shunting. The color Doppler findings correlated well with angiographic findings. Color Doppler sonography can demonstrate intratumoral arteriovenous shunting in hemangiopericytoma and may be used to help avoid profuse bleeding when performing a preoperative biopsy.
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Affiliation(s)
- C Juan
- Department of Radiology, National Defense Medical Center and Tri-Service General Hospital, 8, Section 3, Ting-Chow Road, Taipei, Taiwan
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Freedland SJ, Bui MH, Chao D, Pantuck AJ, Zisman A, Belldegrun AS. Biomarkers for early detection and optimized treatment for transitional cell carcinoma. Rev Urol 2001; 3:210-2. [PMID: 16985721 PMCID: PMC1476060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
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Dunbar PR, Smith CL, Chao D, Salio M, Shepherd D, Mirza F, Lipp M, Lanzavecchia A, Sallusto F, Evans A, Russell-Jones R, Harris AL, Cerundolo V. A shift in the phenotype of melan-A-specific CTL identifies melanoma patients with an active tumor-specific immune response. J Immunol 2000; 165:6644-52. [PMID: 11086110 DOI: 10.4049/jimmunol.165.11.6644] [Citation(s) in RCA: 112] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
In a significant proportion of melanoma patients, CTL specific for the melan-A(26/7-35) epitope can be detected in peripheral blood using HLA-A2/peptide tetramers. However, the functional capacity of these CTL has been controversial, since although they prove to be effective killers after in vitro expansion, in some patients they have blunted activation responses ex vivo. We used phenotypic markers to characterize melan-A tetramer(+) cells in both normal individuals and melanoma patients, and correlated these markers with ex vivo assays of CTL function. Melanoma patients with detectable melan-A tetramer(+) cells in peripheral blood fell into two groups. Seven of thirteen patients had a CCR7(+) CD45R0(-) CD45RA(+) phenotype, the same as that found in some healthy controls, and this phenotype was associated with a lack of response to melan-A peptide ex vivo. In the remaining six patients, melan-A tetramer(+) cells were shifted toward a CCR7(-) CD45R0(+) CD45RA(-) phenotype, and responses to melan-A peptide could be readily demonstrated ex vivo. When lymph nodes infiltrated by melan-A-expressing melanoma cells were examined, a similar dichotomy emerged. These findings demonstrate that activation of melan-A-specific CTL occurs in only some patients with malignant melanoma, and that only patients with such active immune responses are capable of responding to Ag in ex vivo assays.
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MESH Headings
- Adult
- Aged
- Aged, 80 and over
- Antigens, Neoplasm
- CD8-Positive T-Lymphocytes/cytology
- CD8-Positive T-Lymphocytes/immunology
- CD8-Positive T-Lymphocytes/metabolism
- CD8-Positive T-Lymphocytes/pathology
- Cell Line, Transformed
- Cell Movement/immunology
- Epitopes, T-Lymphocyte/biosynthesis
- Female
- Humans
- Immunophenotyping
- Lymph Nodes/pathology
- Lymphocyte Subsets/cytology
- Lymphocyte Subsets/immunology
- Lymphocyte Subsets/metabolism
- Lymphocyte Subsets/pathology
- Lymphocytes, Tumor-Infiltrating/immunology
- Lymphocytes, Tumor-Infiltrating/metabolism
- Lymphocytes, Tumor-Infiltrating/pathology
- MART-1 Antigen
- Male
- Melanoma/blood
- Melanoma/immunology
- Melanoma/metabolism
- Melanoma/pathology
- Middle Aged
- Neoplasm Proteins/biosynthesis
- Neoplasm Proteins/blood
- T-Lymphocytes, Cytotoxic/cytology
- T-Lymphocytes, Cytotoxic/immunology
- T-Lymphocytes, Cytotoxic/metabolism
- T-Lymphocytes, Cytotoxic/pathology
- Tumor Cells, Cultured
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Affiliation(s)
- P R Dunbar
- Molecular Immunology Group Nuffield Department of Medicine, and Imperial Cancer Research Foundation, Institute of Molecular Medicine, and Nuffield Department of Surgery, University of Oxford, John Radcliffe Hospital, Oxford, United Kingdom
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40
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Abstract
This paper explores physical activity adherence among older adults in clinical research. We address the unique challenges associated with promoting physical activity, including the amount of time and effort, perceived benefits, and recommendations from professionals. We explore useful strategies to enhance adherence in the realm of physical activity interventions, including the development of theory-based physical activity interventions that acknowledge participant needs and expectations, promote self-regulatory skills, view exercise as an ongoing process subject to relapse, and utilize phone contacts for home-based activity programs. We conclude with directions for future clinical trials to enhance exercise adherence that include the need for a precise definition and operationalization of adherence, linkages between physical activity interventions and theory, and the study of exercise in both structured and home-based settings. Control Clin Trials 2000;21:212S-217S
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Affiliation(s)
- D Chao
- Center for Health Services Research in Primary Care, University of California, Davis, Sacramento CA 95817, USA
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Chao D, Espeland MA, Farmer D, Register TC, Lenchik L, Applegate WB, Ettinger WH. Effect of voluntary weight loss on bone mineral density in older overweight women. J Am Geriatr Soc 2000; 48:753-9. [PMID: 10894313 DOI: 10.1111/j.1532-5415.2000.tb04749.x] [Citation(s) in RCA: 92] [Impact Index Per Article: 3.8] [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: 11/29/2022]
Abstract
OBJECTIVES To examine the effect of diet and exercise-induced weight loss on bone mineral density in overweight postmenopausal women DESIGN A 1-year prospective, randomized clinical trial. SETTING Two university medical school research centers. PARTICIPANTS Sixty-seven overweight postmenopausal women, a subset of the women who participated in the Trial of Nonpharmacological Interventions in the Elderly (TONE) to control hypertension. The participants were assigned randomly to one of four groups: usual care, weight loss only, sodium restriction only, or combined weight loss/sodium restriction. INTERVENTION All TONE participants in the treatment groups attended regular dietary intervention sessions to lose weight, reduce sodium intake, or both that they might refrain from using antihypertensive medications for a period of 15 to 36 months (median = 29 months). MEASUREMENTS Bone mineral density (BMD) assessed by dual energy X-ray absorptiometry (DXA), serum and urine markers of bone metabolism, and other demographic and clinical data were collected at baseline, 6 months, and 12 months. RESULTS Women assigned to the weight loss interventions lost 9.2 +/- 1.2 lbs (mean +/- SE) at 6 months and 7.7 +/- 2.0 lbs at 12 months compared with 1.8 +/- 1.0 lbs at 6 months and 1.9 +/- 1.6 lbs at 12 months for those assigned to no weight loss intervention (P < .0001). Weight loss was correlated with a decrease in total body BMD (P = .004) and an increase in osteocalcin (P = .004) after controlling for baseline bone measures, intervention assignment, and other baseline covariates. Regression analyses indicated that total body BMD decreased by 6.25 +/- 2.06 g/cm2 x 10-4 for each pound of weight loss. CONCLUSIONS Voluntary weight loss in overweight postmenopausal women is associated with modest decrease in total body BMD. Clinicians recommending weight loss for older postmenopausal women may need to include recommendations for reducing the risk of bone loss.
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Affiliation(s)
- D Chao
- Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA
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Abstract
Dendritic cells (DC) are specialized antigen-presenting cells. DC can acquire and process antigens in the periphery before maturing and migrating to secondary lymphoid tissues where they present the antigens and deliver co-stimulatory signals to T cells. We describe an immunostimulatory oligonucleotide containing a CpG motif that stimulated murine DC to up-regulate co-stimulatory molecules, induce T-cell proliferative responses and secrete interleukin-12 in vitro. Administration of this oligonucleotide, but not of a control oligonucleotide lacking this motif, to mice led to the disappearance of DC from the marginal zone and T-cell areas of spleen, but not from heart or kidney. The same CpG did not cause maturation of monocyte-derived human DC in vitro, but lipopolysaccharide-treated monocyte-derived DC showed enhanced functional activity and up-regulated co-stimulatory molecules.
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Affiliation(s)
- S Behboudi
- Nuffield Department of Surgery, University of Oxford, John Radcliffe Hospital, Oxford, UK
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Francis R, Chao D. Biological Therapy of Cancer--fifth symposium. From basic research to clinical application. 27-30 October 1999, Munich, Germany. IDrugs 2000; 3:142-6. [PMID: 16107923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
This meeting highlighted the exciting progress being made in biological therapies for cancer. There are now antibodies licensed for therapy, with cytokines available for therapy and growth factors in routine use. Understanding the immune system and tumor biology, are vital components of developing novel therapies. Cell-mediated immunity is clearly important, not only for vaccine therapies and dendritic cell approaches, but also for antibody therapies. The main areas of biological therapy covered by the meeting were tumor immunology, vaccine therapy, dendritic cell approaches, gene therapy and antibody therapies. Many of these biological therapies have now entered phase I trials and appear to be well tolerated with minimal side effects. Trial design must be modified, as with these therapies standard phase I objectives of establishing the maximum tolerated dose (MTD), assessing toxicity and pharmacokinetics must be combined with biological 'end-points', such as measurement of immune activation or downstream effects. As these agents enter phase II efficacy trials, their role will become further established. They may provide new alternatives for therapy either alone or in combination with current chemotherapeutic agents.
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Affiliation(s)
- R Francis
- Royal Free Hospital School of Medicine, University of London, Department of Clinical Oncology, Rowland Hill Street, London , NW3 2PF, UK.
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Chao D, Bahl P, Houlbrook S, Hoy L, Harris A, Austyn JM. Human cultured dendritic cells show differential sensitivity to chemotherapy agents as assessed by the MTS assay. Br J Cancer 1999; 81:1280-4. [PMID: 10604723 PMCID: PMC2362963 DOI: 10.1038/sj.bjc.6694366] [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] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Assessment of the chemosensitivity of dendritic cells (DC) may allow more rational development of combined chemotherapy and immunotherapy protocols. Human monocyte-derived DC generated reproducible results in the MTS (Owen's reagent) assay, which was then used to study DC survival after treatment with four different chemotherapy agents. DC preparations from three different donors were used per drug. DC were sensitive to doxorubicin (concentration range 0.1-50 microM) with variation in sensitivity between donors (IC50 244-1100 nM). The most extreme variation was seen for vinblastine (concentration range 250-0.025 microM with IC50 0.15-17.25 microM). In contrast, there was relative resistance to etoposide (concentration range 0.2-200 microM) and 5-fluorouracil (concentration range 0.7-7700 microM) with no toxicity seen until 50 microM and 770 microM respectively. The function of DC in allogeneic mixed leucocyte reactions closely paralleled results from the MTS assays. The differential sensitivity to chemotherapy agents did not appear to be due to expression of P-glycoprotein. These results suggest that etoposide or 5-fluorouracil is less likely to reduce the immunotherapeutic potential of DC and may be valuable in the design of prodrug activation therapy.
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Affiliation(s)
- D Chao
- Nuffield Department of Surgery, John Radcliffe Hospital, Headington, Oxford, UK
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Dunbar PR, Chen JL, Chao D, Rust N, Teisserenc H, Ogg GS, Romero P, Weynants P, Cerundolo V. Cutting edge: rapid cloning of tumor-specific CTL suitable for adoptive immunotherapy of melanoma. J Immunol 1999; 162:6959-62. [PMID: 10358133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
Adoptive immunotherapy using CTL has provided some clinical benefit to patients with metastatic melanoma. Use of cloned CTL of known specificity might improve clinical effect, but technical difficulties have limited exploration of this possibility. We have used fluorescence-driven cell sorting to clone tumor-specific CTL after staining with tetrameric MHC class I/peptide complexes. CTL specific for the melanoma Ags melan-A, tyrosinase, and MAGE3 were cloned from the peripheral blood, tumor-infiltrated lymph nodes, and skin metastases of five patients. Clones were isolated and characterized in as little as 6 weeks, much faster than is possible with previous techniques. We show that these CTL clones express markers compatible with immunotherapeutic use in melanoma, including the cutaneous lymphocyte Ag, which is associated with homing to skin.
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Affiliation(s)
- P R Dunbar
- Molecular Immunology Group, Institute of Molecular Medicine, John Radcliffe Hospital, Oxford, United Kingdom.
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Liu H, Chao D, Nakayama EE, Taguchi H, Goto M, Xin X, Takamatsu JK, Saito H, Ishikawa Y, Akaza T, Juji T, Takebe Y, Ohishi T, Fukutake K, Maruyama Y, Yashiki S, Sonoda S, Nakamura T, Nagai Y, Iwamoto A, Shioda T. Polymorphism in RANTES chemokine promoter affects HIV-1 disease progression. Proc Natl Acad Sci U S A 1999; 96:4581-5. [PMID: 10200305 PMCID: PMC16375 DOI: 10.1073/pnas.96.8.4581] [Citation(s) in RCA: 256] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
RANTES (regulated on activation normal T cell expressed and secreted) is one of the natural ligands for the chemokine receptor CCR5 and potently suppresses in vitro replication of the R5 strains of HIV-1, which use CCR5 as a coreceptor. Previous studies showed that peripheral blood mononuclear cells or CD4(+) lymphocytes obtained from different individuals had wide variations in their ability to secrete RANTES. These findings prompted us to analyze the upstream noncoding region of the RANTES gene, which contains cis-acting elements involved in RANTES promoter activity, in 272 HIV-1-infected and 193 non-HIV-1-infected individuals in Japan. Our results showed that there were two polymorphic positions, one of which was associated with reduced CD4(+) lymphocyte depletion rates during untreated periods in HIV-1-infected individuals. This mutation, RANTES-28G, occurred at an allele frequency of approximately 17% in the non-HIV-1-infected Japanese population and exerted no influence on the incidence of HIV-1 infection. Functional analyses of RANTES promoter activity indicated that the RANTES-28G mutation increases transcription of the RANTES gene. Taken together, these data suggest that the RANTES-28G mutation increases RANTES expression in HIV-1-infected individuals and thus delays the progression of the HIV-1 disease.
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Affiliation(s)
- H Liu
- Department of Infectious Diseases, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan
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Wang LC, Chao D, Yen CM, Chen ER. Improvements in the infectivity of cryopreserved third-stage larvae of Angiostrongylus cantonensis using a programmable freezer. Parasitol Res 1999; 85:151-4. [PMID: 9934966 DOI: 10.1007/s004360050525] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Although there have been some advances in the cryopreservation of Angiostrongylus cantonensis, the degrees of viability and infectivity of the cryopreserved developmental stages have not been high. A two-step freezing protocol using a programmable freezer was determined to be effective in improving the infectivity of the cryopreserved third-stage larvae of this parasite. After washing steps and suspension in 10% (v/v) dimethylsulfoxide and equilibrium at room temperature the larvae were placed into the freezer. The temperature was lowered first at 0.8 degrees C/min from room temperature to -40 degrees C and then at 10 degrees C/min to -70 degrees C. The samples were plunged into liquid nitrogen. After storage in liquid nitrogen for 7-15 days the larvae were thawed rapidly in 37 degrees C water and 27.6% were found to show vigorous "S-shape" movement without significant changes in appearance. These larvae (50/rodent) could develop to the fifth stage in mice (42.6%) and establish patent infection in rats (40.4%). Moreover, there was no significant difference in the recovery rates of cryopreserved worms and their unfrozen counterparts. These findings indicate that steady precooling conditions may decrease damage with regard to the infectivity of cryptopreserved third-stage larvae of A. cantonensis.
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Affiliation(s)
- L C Wang
- Department of Parasitology, College of Medicine, Chang-Gung University, Tao-Yuan, Taiwan.
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Abstract
Blastomycosis has a wide spectrum of clinical presentations. When a patient presents with chronic pneumonia, especially coexisting with cutaneous lesions, blastomycosis infection needs to be considered in the differential diagnosis. Erythema nodosum can rarely be associated with pulmonary blastomycosis. A positive culture is the gold standard of diagnosis; occasionally, the organism can be identified by its typical "shoe print" morphology with periodic acid-Schiff (PAS) stain. The Gen-Probe technique may be required to confirm the uncertain culture results. The preferred treatment for blastomycosis in less severe cases is oral itraconazole, with amphotericin B in disseminated cases.
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Affiliation(s)
- D Chao
- Louisiana State University (LSU) Medical Center, E.A. Conway Division 71201, USA
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Chao D, von Schlippe M, Harland SJ. A phase II study of continuous infusion 5-fluorouracil (5-FU) with epirubicin and cisplatin in metastatic, hormone-resistant prostate cancer: an active new regimen. Eur J Cancer 1997; 33:1230-3. [PMID: 9301448 DOI: 10.1016/s0959-8049(97)00097-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [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: 02/05/2023]
Abstract
The aim of this phase II study was to examine the efficacy of combination chemotherapy comprising epirubicin, cisplatin and protracted infusion 5-fluorouracil in patients with metastatic prostate cancer. 21 patients were treated, of whom 9 (43%) responded for a minimum of 7 months. Continuation of previously effective second-line hormone therapies appeared to be a determinant of response; only 1 of 6 patients responded after its discontinuation. In a further 3 patients, response was only seen after re-introduction of previously effective hormone treatments. In patients of 70 years and under with prostate cancer resistant to androgen-deprivation therapy and who still have good performance status, ECF chemotherapy can achieve useful remissions.
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Affiliation(s)
- D Chao
- Department of Oncology, U.C.L. Medical School, Middlesex Hospital, London, U.K
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Chen WC, Lee YH, Chao D, Huang JK. Two-dimensional electrophoretic analyses of urinary proteins in Chinese male urinary stone patients. Kaohsiung J Med Sci 1997; 13:308-14. [PMID: 9226972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
This study was aimed to detect the differences in soluble urinary proteins between normal Chinese male individuals and urinary stone formers by 2-dimensional electrophoresis. Twenty urine samples were obtained from normal male adults and 35 from recurrent male urinary stone formers. The stone compositions included calcium oxalate, uric acid, carbonate apatite, and brushite. Two hundred milliliters of fresh urine was collected for analysis. Each urine sample was concentrated, dialyzed, frozen and lyophilized. The samples of the same stone composition were pooled and subjected to two-dimensional electrophoresis. Comparison of protein profiles between normal individuals and stone formers revealed a number of proteins which are not present in the urine of normal individuals, 5 from calcium oxalate, 2 from uric acid, 3 from carbonate apatite and 2 from brushite. These urinary stone-associated proteins comprise proteins A (37kd), B (30kd), C (26kd), D (25kd), and E (22kd) for calcium oxalate, proteins F (63kd) and G (59kd) for uric acid, protein H (65kd), I (42kd), and J (30kd) for carbonate apatite as well as proteins K (61kd) and L (59kd) for brushite. Among them, the proteins A, I, and J exhibited charge heterogeneity.
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Affiliation(s)
- W C Chen
- Department of Surgery, Veterans General Hospital Kaohsiung, Taiwan, Republic of China
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