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Lau E, Salem A, Chan JCN, So WY, Kong A, Lamotte M, Luk A. Insulin glargine compared to neutral protamine Hagedorn (NPH) insulin in patients with type-2 diabetes uncontrolled with oral anti-diabetic agents alone in Hong Kong: a cost-effectiveness analysis. COST EFFECTIVENESS AND RESOURCE ALLOCATION 2019; 17:13. [PMID: 31303866 PMCID: PMC6604305 DOI: 10.1186/s12962-019-0180-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 06/21/2019] [Indexed: 12/20/2022] Open
Abstract
Background International guidelines recommend using basal insulin in patients with type-2 diabetes mellitus if glycaemic target cannot be attained on non-insulin anti-diabetic drugs. Available choices of basal insulin include intermediate-acting neutral protamine Hagedorn (NPH) insulin and long-acting insulin analogues like insulin glargine U100. Despite clear advantages of glargine U100, the existing practice in Hong Kong still favours NPH insulin due to lower immediate drug costs. Objectives The objective of this study was to assess the cost-effectiveness of insulin glargine U100 compared to NPH insulin in patients with type-2 diabetes uncontrolled with non-insulin anti-diabetic agents alone in Hong Kong. Methods The IQVIA™ Core Diabetes Model (CDM) v9.0 was used to conduct the cost-effectiveness analysis of glargine U100 versus NPH. Baseline characteristics were collected from the Hong Kong Diabetes Registry. Efficacy rates were extracted from a published study comparing glargine U100 and NPH in Asia, utilities from published literature, and costs constructed using the Hong Kong Hospital Authority (HA) Gazette (public healthcare setting). The primary outcome was an incremental cost-effectiveness ratio (ICER). Results Insulin glargine U100 resulted in an ICER of HKD 98,663 per Quality Adjusted Life Year (QALY) gained. The incremental gains in QALY and costs were 0.217 years and HKD 21,360 respectively. Results from scenario and probabilistic sensitivity analyses were consistent with that from base case analysis. Conclusion Insulin glargine U100 is a cost-effective treatment for patients with type 2 diabetes compared to NPH insulin in setting in Hong Kong. This was mainly driven by the significantly lower rates of hypoglycaemia of insulin glargine U100 than NPH insulin. Electronic supplementary material The online version of this article (10.1186/s12962-019-0180-9) contains supplementary material, which is available to authorized users.
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Smith A, Denehy K, Ong KL, Lau E, Hagan D, Malkani A. Total hip arthroplasty following failed intertrochanteric hip fracture fixation treated with a cephalomedullary nail. Bone Joint J 2019; 101-B:91-96. [PMID: 31146562 DOI: 10.1302/0301-620x.101b6.bjj-2018-1375.r1] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
AIMS Cephalomedullary nails (CMNs) are commonly used for the treatment of intertrochanteric hip fractures. Total hip arthroplasty (THA) may be used as a salvage procedure when fixation fails in these patients. The aim of this study was to analyze the complications of THA following failed intertrochanteric hip fracture fixation using a CMN. PATIENTS AND METHODS Patients who underwent THA were identified from the 5% subset of Medicare Parts A/B between 2002 and 2015. A subgroup involving those with an intertrochanteric fracture that was treated using a CMN during the previous five years was identified and compared with the remaining patients who underwent THA. The length of stay (LOS) was compared using both univariate and multivariate analysis. The incidence of infection, dislocation, revision, and re-admission was compared between the two groups, using multivariate analysis adjusted for demographic, hospital, and clinical factors. RESULTS The Medicare data yielded 56 522 patients who underwent primary THA, of whom 369 had previously been treated with a CMN. The percentage of THAs that were undertaken between 2002 and 2005 in patients who had previously been treated with a CMN (0.346%) more than doubled between 2012 and 2015 (0.781%). The CMN group tended to be older and female, and to have a higher Charlson Comorbidity Index and lower socioeconomic status. The mean LOS was 1.5 days longer (5.3 vs 3.8) in the CMN group (p < 0.0001). The incidence of complications was significantly higher in the CMN group compared with the non-CMN group: infection (6.2% vs 2.6%), dislocation (8.1% vs 4.5%), revision (8.4% vs 4.3%), revision for infection (1.1% vs 0.37%), and revision for dislocation (2.2% vs 0.6%). CONCLUSION The incidence of conversion to THA following failed intertrochanteric hip fracture fixation using a CMN continues to increase. This occurs in elderly patients with increased comorbidities. There is a significantly increased risk of infection, dislocation, and LOS in these patients. Patients with failed intertrochanteric hip fracture fixation using a CMN who require THA should be made aware of the increased risk of complications, and steps need to be taken to reduce this risk. Cite this article: Bone Joint J 2019;101-B(6 Supple B):91-96.
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Miller PD, Hattersley G, Lau E, Fitzpatrick LA, Harris AG, Williams GC, Hu MY, Riis BJ, Russo L, Christiansen C. Bone mineral density response rates are greater in patients treated with abaloparatide compared with those treated with placebo or teriparatide: Results from the ACTIVE phase 3 trial. Bone 2019; 120:137-140. [PMID: 30359763 DOI: 10.1016/j.bone.2018.10.015] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 09/26/2018] [Accepted: 10/15/2018] [Indexed: 11/30/2022]
Abstract
BACKGROUND Abaloparatide is a 34-amino acid peptide that selectively binds to the RG conformation of the parathyroid hormone receptor type 1. It was developed for the treatment of women with postmenopausal osteoporosis at high risk of fracture. In ACTIVE, an 18-month phase 3 study (NCT01343004), abaloparatide increased bone mineral density (BMD), decreased the risk of vertebral and nonvertebral fractures compared with placebo, and decreased the risk of major osteoporotic fractures compared with placebo and teriparatide. Here, we report a prospective, exploratory BMD responder analysis from ACTIVE. METHODS Proportions of patients experiencing BMD gains from baseline of >0%, >3%, and >6% at the total hip, femoral neck, and lumbar spine at 6, 12, and 18 months of treatment were compared among the placebo, abaloparatide, and teriparatide groups in ACTIVE. Responders were defined prospectively as patients experiencing BMD gains at all 3 anatomic sites. RESULTS At months 6, 12, and 18, there were significantly more >3% BMD responders in the abaloparatide group compared with placebo and teriparatide: month 6, 19.1% vs 0.9% for placebo and 6.5% for teriparatide; month 12, 33.2% vs 1.5% and 19.8%; month 18, 44.5% vs 1.9% and 32.0% (P < 0.001 for all comparisons of abaloparatide to placebo and to teriparatide). Findings were similar for the >0% and >6% responder thresholds. CONCLUSIONS In postmenopausal women with osteoporosis, a significantly greater proportion of patients treated with abaloparatide experienced increases in BMD than did those treated with placebo or teriparatide.
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Ong KL, Beall DP, Frohbergh M, Lau E, Hirsch JA. Correction to: Were VCF patients at higher risk of mortality following the 2009 publication of the vertebroplasty "sham" trials? Osteoporos Int 2019; 30:703. [PMID: 30805676 PMCID: PMC6828487 DOI: 10.1007/s00198-019-04877-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The article Were VCF patients at higher risk of mortality following the 2009 publication of the vertebroplasty "sham" trials?, written by K. L. Ong, D. P. Beall, M. Frohbergh, E. Lau, and J. A. Hirsch was originally published electronically on the publisher's internet portal.
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Ratwatte S, Strange G, Corrigan C, Kotlyar E, Kermeen F, Williams T, Celermajer D, Dwyer N, Whitford H, Wrobel J, Feenstra J, Lavendar M, Whyte K, Collins N, Steele P, Proudman S, Thakkar V, Keating D, Keogh A, Lau E. Early Treatment of Pulmonary Arterial Hypertension: Is a PVR > 3 Threshold too High? Heart Lung Circ 2019. [DOI: 10.1016/j.hlc.2019.06.084] [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]
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Ong KL, Beall DP, Frohbergh M, Lau E, Hirsch JA. Reply to "At what price decreased mortality risk?". Osteoporos Int 2018; 29:1929-1930. [PMID: 29725713 DOI: 10.1007/s00198-018-4551-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Accepted: 04/24/2018] [Indexed: 12/26/2022]
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Pasalic L, Wing‐Lun E, Lau JK, Campbell H, Pennings GJ, Lau E, Connor D, Liang HP, Muller D, Kritharides L, Hogg PJ, Chen VM. Novel assay demonstrates that coronary artery disease patients have heightened procoagulant platelet response. J Thromb Haemost 2018; 16:1198-1210. [PMID: 29569428 PMCID: PMC6635759 DOI: 10.1111/jth.14008] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Indexed: 01/08/2023]
Abstract
Essentials Procoagulant platelets can be detected using GSAO in human whole blood. Stable coronary artery disease is associated with a heightened procoagulant platelet response. Agonist-induced procoagulant platelet response is not inhibited by aspirin alone. Collagen plus thrombin induced procoagulant platelet response is partially resistant to clopidogrel. SUMMARY Background Procoagulant platelets are a subset of highly activated platelets with a critical role in thrombin generation. Evaluation of their clinical utility in thrombotic disorders, such as coronary artery disease (CAD), has been thwarted by the lack of a sensitive and specific whole blood assay. Objectives We developed a novel assay, utilizing the cell death marker, GSAO [(4-(N-(S-glutathionylacetyl)amino)phenylarsonous acid], and the platelet activation marker, P-selectin, to identify procoagulant platelets in whole blood by flow cytometry. Patients/Methods Using this assay, we characterized the procoagulant platelet population in healthy controls and a cohort of patients undergoing elective coronary angiography. Results In patients with CAD, compared with patients without CAD, there was a heightened procoagulant platelet response to thrombin (25.2% vs. 12.2%), adenosine diphosphate (ADP) (7.8% vs. 2.7%) and thrombin plus collagen (27.2% vs. 18.3%). The heightened procoagulant platelet potential in CAD patients was not associated with other markers of platelet function, including aggregation, dense granule release and activation of α2b β3 integrin. Although dual antiplatelet therapy (DAPT) was associated with partial suppression of procoagulant platelets, this inhibitory effect on a patient level could not be predicted by aggregation response to ADP and was not fully suppressed by clopidogrel. Conclusions We report for the first time that procoagulant platelets can be efficiently detected in a few microliters of whole blood using the cell death marker, GSAO, and the platelet activation marker, P-selectin. A heightened procoagulant platelet response may provide insight into the thrombotic risk of CAD and help identify a novel target for antiplatelet therapies in CAD.
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Ong K, Beall D, Lau E, Frohbergh M, Hirsch J. Abstract No. 592 How many VCF patients were exposed to elevated mortality risk from the diminution in vertebral augmentation referrals? J Vasc Interv Radiol 2018. [DOI: 10.1016/j.jvir.2018.01.637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Ong KL, Beall DP, Frohbergh M, Lau E, Hirsch JA. Were VCF patients at higher risk of mortality following the 2009 publication of the vertebroplasty "sham" trials? Osteoporos Int 2018; 29:375-383. [PMID: 29063215 PMCID: PMC6394540 DOI: 10.1007/s00198-017-4281-z] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Accepted: 10/17/2017] [Indexed: 12/24/2022]
Abstract
UNLABELLED The 5-year period following 2009 saw a steep reduction in vertebral augmentation volume and was associated with elevated mortality risk in vertebral compression fracture (VCF) patients. The risk of mortality following a VCF diagnosis was 85.1% at 10 years and was found to be lower for balloon kyphoplasty (BKP) and vertebroplasty (VP) patients. INTRODUCTION BKP and VP are associated with lower mortality risks than non-surgical management (NSM) of VCF. VP versus sham trials published in 2009 sparked controversy over its effectiveness, leading to diminished referral volumes. We hypothesized that lower BKP/VP utilization would lead to a greater mortality risk for VCF patients. METHODS BKP/VP utilization was evaluated for VCF patients in the 100% US Medicare data set (2005-2014). Survival and morbidity were analyzed by the Kaplan-Meier method and compared between NSM, BKP, and VP using Cox regression with adjustment by propensity score and various factors. RESULTS The cohort included 261,756 BKP (12.6%) and 117,232 VP (5.6%) patients, comprising 20% of the VCF patient population in 2005, peaking at 24% in 2007-2008, and declining to 14% in 2014. The propensity-adjusted mortality risk for VCF patients was 4% (95% CI, 3-4%; p < 0.001) greater in 2010-2014 versus 2005-2009. The 10-year risk of mortality for the overall cohort was 85.1%. BKP and VP cohorts had a 19% (95% CI, 19-19%; p < 0.001) and 7% (95% CI, 7-8%; p < 0.001) lower propensity-adjusted 10-year mortality risk than the NSM cohort, respectively. The BKP cohort had a 13% (95% CI, 12-13%; p < 0.001) lower propensity-adjusted 10-year mortality risk than the VP cohort. CONCLUSIONS Changes in treatment patterns following the 2009 VP publications led to fewer augmentation procedures. In turn, the 5-year period following 2009 was associated with elevated mortality risk in VCF patients. This provides insight into the implications of treatment pattern changes and associated mortality risks.
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Girerd B, Montani D, Jais X, Levy M, Savale L, Dorfmuller P, Lau E, Le Pavec J, Parent F, Bonnet D, Soubrier F, Fadel E, Sitbon O, Simonneau G, Humbert M. 5022Clinical phenotypes and outcomes of heritable and sporadic pulmonary veno-occlusive disease. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.5022] [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: 11/13/2022] Open
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Dinsdale E, Lau E, Walshaw D, Ninan S. 61IMPROVING TIMELINESS OF DISCHARGE LETTERS. Age Ageing 2017. [DOI: 10.1093/ageing/afx055.61] [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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Zhang J, Lau E, Hsiao J. 0108 INFLUENCE OF SLEEP DEPRIVATION ON EMOTION REGULATION STRATEGIES: AN EVENT-RELATED POTENTIAL STUDY. Sleep 2017. [DOI: 10.1093/sleepj/zsx050.107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Siva S, Pham D, Tan T, Lam J, Bressel M, Price J, Gill S, Shaw M, Tai K, Violet J, Lau E, Parameswaran B, Chesson B, Lawrentschuck N, Goad J, Murphy D, Kron T, Foroudi F. Principal Analysis of a Phase Ib Trial of Stereotactic Body Radiation Therapy (SBRT) for Primary Kidney Cancer. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.240] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Ko JK, Chai J, Lee VC, Li RH, Lau E, Ho KL, Tam PC, Yeung WS, Ho PC, Ng EH. Sperm retrieval rate and pregnancy rate in infertile couples undergoing in-vitro fertilisation and testicular sperm extraction for non-obstructive azoospermia in Hong Kong. Hong Kong Med J 2016; 22:556-62. [PMID: 27687508 DOI: 10.12809/hkmj154710] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE There are currently no local data on the sperm retrieval and pregnancy rates in in-vitro fertilisation and testicular sperm extraction cycles, especially with regard to the presence of genetic abnormalities. This study aimed to determine the sperm retrieval and pregnancy rates in infertile couples who underwent in-vitro fertilisation and testicular sperm extraction for non-obstructive azoospermia. METHODS This retrospective case series was conducted at a tertiary assisted reproduction unit in Hong Kong. Men with non-obstructive azoospermia who underwent in-vitro fertilisation and testicular sperm extraction between January 2001 and December 2013 were included. The main outcome measures were sperm retrieval and pregnancy rates. RESULTS During the study period, 89 men with non-obstructive azoospermia underwent in-vitro fertilisation and testicular sperm extraction. Sperm was successfully retrieved in 40 (44.9%) men. There was no statistically significant difference in the sperm retrieval rate of those with karyotypic abnormalities (2/5, 40.0% vs 28/61, 45.9%; P=1.000) and AZFc microdeletion (3/6, 50.0% vs 28/61, 45.9%; P=1.000) compared with those without. Sperms were successfully retrieved in patients who had mosaic Klinefelter syndrome (2/3, 66.7%) but not in the patient with non-mosaic Klinefelter syndrome. No sperms were found in men with AZFa or AZFb microdeletions. Pregnancy test was positive in 15 (16.9%) patients and the clinical pregnancy rate was 13.5% (12/89) per cycle. The clinical pregnancy rate per transfer was 34.3% (12/35). CONCLUSIONS The sperm retrieval rate and clinical pregnancy rate per initiated cycle in men undergoing in-vitro fertilisation and testicular sperm extraction in our unit were 44.9% and 13.5%, respectively. No sperms could be retrieved in the presence of AZFa and AZFb microdeletions, but karyotype and AZFc microdeletion abnormalities otherwise did not predict the success of sperm retrieval in couples undergoing in-vitro fertilisation and testicular sperm extraction. Genetic tests are important prior to testicular sperm extraction for patient selection and genetic counselling.
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Lau K, Cheng D, Tseng C, Lau E. More stable emotional perception after daytime nap in individuals with insomnia. Sleep Med 2015. [DOI: 10.1016/j.sleep.2015.02.1522] [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: 11/16/2022]
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Wong M, Leung C, Lau E. The role of insomnia in memory complaint among compulsive checkers. Sleep Med 2015. [DOI: 10.1016/j.sleep.2015.02.1420] [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: 10/22/2022]
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Lee Y, Hung P, Wong M, Lau E. The effect of daytime sleep opportunity on risky decision-making. Sleep Med 2015. [DOI: 10.1016/j.sleep.2015.02.1504] [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: 10/22/2022]
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Yee K, Lau K, Tseng C, Lau E. Interactive effect of depressive symptoms and nap on valence judgment in individuals with insomnia. Sleep Med 2015. [DOI: 10.1016/j.sleep.2015.02.1523] [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: 10/22/2022]
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Miller P, Hattersley G, Lau E, Alexandersen P, Hala T, Mustatea S, Nedergaard B, Krogsaa A, Slessinger J, Zerbini C, Valter I, Visockiene Z, Jendrych B, Kulak C, Marquez F, Harris A, Williams G, Hu MY, Black D, Riis B, Russo L, Christiansen C. OP0248 Responder Analysis of the Effects of Abaloparatide (Parathyroid Hormone Related Peptide) and Teriparatide on Bone Mineral Density in Postmenopausal Women with Osteoporosis: Results of the Active Trial. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.4908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Gao Y, Lau E, Wan H, Lo Y, Mok M. AB0596 Systemic Lupus Erythematosus Patients with Past Neuropsychiatric Involvement is Associated with Worse Cognitive Impairment: A Longitudinal Study. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.2460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Gao Y, Cheung T, Gao J, Lau E, Wan H, Mok M. AB0595 Evaluation of Cognitive Function by Electrophysiological Study in Systemic Lupus Erythematosus Patients with Previous Neuropsychiatric Involvement. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.2461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Vieira R, Oliveira J, Lau E, Serrão R, Sarmento A, Pereira J, Costa L, Carvalho D, Freitas P. SAT0299 Tools to Identify Low Bone Mineral Density in HIV-Infected Men. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.6385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Raffaele K, Lau E, Vidmar T, Li A. Hypothesis-driven testing and analysis: Auditory startle as a case study. Neurotoxicol Teratol 2015. [DOI: 10.1016/j.ntt.2015.04.045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Leung A, Fung Y, Lau E, Chan T, Ng C, To W. Control of Multiple-drugs Resistant Organisms (MDROs) in surgical ward of a general hospital in Hong Kong. JOURNAL OF MICROBIOLOGY, IMMUNOLOGY AND INFECTION 2015. [DOI: 10.1016/j.jmii.2015.02.390] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Lau E, Sedy J, Sander C, Shaw MA, Feng Y, Scortegagna M, Claps G, Robinson S, Cheng P, Srivas R, Soonthornvacharin S, Ideker T, Bosenberg M, Gonzalez R, Robinson W, Chanda SK, Ware C, Dummer R, Hoon D, Kirkwood JM, Ronai ZA. Transcriptional repression of IFNβ1 by ATF2 confers melanoma resistance to therapy. Oncogene 2015; 34:5739-48. [PMID: 25728676 PMCID: PMC4558399 DOI: 10.1038/onc.2015.22] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Revised: 01/02/2015] [Accepted: 01/06/2015] [Indexed: 02/07/2023]
Abstract
The resistance of melanoma to current treatment modalities represents a major obstacle for durable therapeutic response, and thus, the elucidation of mechanisms of resistance is urgently needed. The crucial functions of Activating Transcription Factor-2 (ATF2) in the development and therapeutic resistance of melanoma have been previously reported, although the precise underlying mechanisms remain unclear. Here, we report a protein kinase C epsilon (PKCε)- and Activating Transcription Factor-2 (ATF2)-mediated mechanism that facilitates resistance by transcriptionally repressing the expression of IFNβ1 and downstream type-I IFN signaling, which is otherwise induced upon exposure to chemotherapy. Treatment of early stage melanomas expressing low levels of PKCε with chemotherapies relieves its transcriptional repression of IFNB1, resulting in impaired S-phase progression, a senescence-like phenotype, and increased cell death. This response is lost in late stage metastatic melanomas expressing high levels of PKCε. Notably, nuclear ATF2 and low expression of IFNβ1 in melanoma tumor samples correlates with poor patient responsiveness to biochemotherapy or neoadjuvant IFN-α2a. Conversely, cytosolic ATF2 and induction of IFNβ1 coincides with therapeutic responsiveness. Collectively, we identify an IFNβ1-dependent, cell autonomous mechanism that contributes to the therapeutic resistance of melanoma via the PKCε-ATF2 regulatory axis.
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