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Lee J, Petrini I, Hwang J, Giovannetti E, Voortman J, Wang Y, Steinberg SM, Funel N, Meltzer PS, Wang Y, Giaccone G. Array-based comparative genomic hybridization analysis to identify prognostic markers for resected pancreatic cancer. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.4097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Maquat LE, Hwang J, Sato H, Tang Y. CBP80-promoted mRNP rearrangements during the pioneer round of translation, nonsense-mediated mRNA decay, and thereafter. COLD SPRING HARBOR SYMPOSIA ON QUANTITATIVE BIOLOGY 2011; 75:127-34. [PMID: 21447822 DOI: 10.1101/sqb.2010.75.028] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
In mammalian cells, two different messenger ribonucleoproteins (mRNPs) serve as templates for protein synthesis. Newly synthesized mRNPs bound by the cap-binding protein heterodimer CBP80-CBP20 (CBC) initially undergo a pioneer round of translation. One purpose of this round of translation is to ensure the quality of gene expression, as exemplified by nonsense-mediated messenger RNA (mRNA) decay (NMD). NMD largely functions to eliminate mRNAs that prematurely terminate translation, although NMD also contributes to proper gene control, and it targets CBC-bound mRNPs. CBC-bound mRNPs are remodeled to eukaryotic translation initiation factor (eIF)4E-bound mRNPs in steps that (1) are a consequence of the pioneer round of translation and (2) occur independently of translation. Rather than supporting NMD, eIF4E-bound mRNPs provide for the bulk of cellular protein synthesis and are the primary targets of mRNA decay mechanisms that conditionally regulate gene expression. Here, we overview cellular processes by which CBC-bound mRNPs are remodeled to eIF4E-bound mRNPs. We also describe the molecular movements of certain factors during NMD in view of the influential role of CBP80.
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Hwang J, Kim Y. Adolescents’ physical activity and its related cognitive and behavioural processes. Biol Sport 2011. [DOI: 10.5604/935863] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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154
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Hwang J, Fisch M, Zhang H, Kallen MA, Routbort M, Lal L, Vierling J, Suarez-Almazor M. Predictors of hepatitis B screening among patients with cancer. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.4_suppl.180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
180 Background: Patients with hepatitis B virus (HBV) infection are at risk of reactivation after chemotherapy. It is unclear whether all patients or only those with certain risk factors should be screened for HBV before chemotherapy. The purpose of our study was to determine the clinical predictors of HBV screening in a single institution. Methods: In this retrospective, cross-sectional study, we evaluated new patients who received chemotherapy between 1/1/04 and 9/30/07. We collected data on patients' demographics, types of cancer and chemotherapy, and HBV risk factors such as a previous ICD-9 code for hepatitis C or other liver conditions. We searched for HBV screening as defined by an HBsAg or anti-HBc test ordered prior to chemotherapy. In univariate analyses, we examined the association between each of the patient-related variables and HBV screening. We then determined predictors of HBV screening in a multivariable logistic regression model. Results: We found 10,729 patients who had chemotherapy during the study period. Overall, 16.7% had HBV screening. All of the following predictors in the univariate analysis were significant for HBV screening at the p<0.01 level: age, gender, ethnicity, U.S. residence, cancer type, chemotherapy type, and having a HBV risk factor. In multivariable logistic regression examining predictors for screening using HBsAg, we found that Asian ethnicity (OR 1.75; 1.16-2.66), hematologic malignancies (OR 22.65; 19.3-26.31), and the receipt of rituxamab (OR 3.71; 3.03-4.48) were significant predictors at the p<0.01 level. Women were less likely to be screened than men (OR 0.68; 0.59-0.78). We repeated the analyses using the anti-HBc screening test, and the results were similar. Overall, 1.5% of the screened patients had a positive HBV test. Conclusions: We found that ethnicity, cancer types, and chemotherapy drugs predict physician-driven HBV screening. Future research is needed to study the predictors of a positive HBV screening test and reactivation of HBV after chemotherapy. [Table: see text]
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Kim D, Hwang J, Kim K. 66P THE FEASIBILITY OF ROUTINE MEDICAL THORACOSCOPY FOR THE DETECTION OF MALIGNANT EFFUSION IN THE DIAGNOSIS OF UNDETERMINED PLEURAL EFFUSION. Lung Cancer 2011. [DOI: 10.1016/s0169-5002(11)70203-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ostergaard P, Simpson MA, Brice G, Mansour S, Connell FC, Onoufriadis A, Child AH, Hwang J, Kalidas K, Mortimer PS, Trembath R, Jeffery S. Rapid identification of mutations in GJC2 in primary lymphoedema using whole exome sequencing combined with linkage analysis with delineation of the phenotype. J Med Genet 2011; 48:251-5. [DOI: 10.1136/jmg.2010.085563] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Xi X, Hwang J, Martin C, Tanner DB, Carr GL. Far-infrared conductivity measurements of pair breaking in superconducting Nb 0.5 Ti 0.5 N thin films induced by an external magnetic field. PHYSICAL REVIEW LETTERS 2010; 105:257006. [PMID: 21231618 DOI: 10.1103/physrevlett.105.257006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2010] [Indexed: 05/27/2023]
Abstract
We report the complex optical conductivity of a superconducting thin film of Nb 0.5 Ti 0.5 N in an external magnetic field. The field was applied parallel to the film surface and the conductivity extracted from far-infrared transmission and reflection measurements. The real part shows the superconducting gap, which we observe to be suppressed by the applied magnetic field. We compare our results with the pair-breaking theory of Abrikosov and Gor'kov and confirm directly the theory's validity for the optical conductivity.
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DeConti RC, Algazi AP, Andrews S, Urbas P, Born O, Stoeckigt D, Floren L, Hwang J, Weber J, Sondak VK, Daud AI. Phase II trial of sagopilone, a novel epothilone analog in metastatic melanoma. Br J Cancer 2010; 103:1548-53. [PMID: 20924376 PMCID: PMC2990578 DOI: 10.1038/sj.bjc.6605931] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2010] [Revised: 09/01/2010] [Accepted: 09/03/2010] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Sagopilone is a novel fully synthetic epothilone with promising preclinical activity and a favourable toxicity profile in phase I testing. METHODS A phase II pharmacokinetic and efficacy trial was conducted in patients with metastatic melanoma. Patients had measurable disease, Eastern Cooperative Oncology Group performance status 0-2, adequate haematological, and organ function, with up to 2 previous chemotherapy and any previous immunotherapy regimens. Sagopilone, 16 mg m⁻², was administered intravenously over 3 h every 21 days until progression or unacceptable toxicity. RESULTS Thirty-five patients were treated. Sagopilone showed multi-exponential kinetics with a mean terminal half-life of 64 h and a volume of distribution of 4361 l m⁻² indicating extensive tissue/tubulin binding. Only grade 2 or lower toxicity was observed: these included sensory neuropathy (66%), leukopenia (46%), fatigue (34%), and neutropenia (31%). The objective response rate was 11.4% (one confirmed complete response, two confirmed partial responses, and one unconfirmed partial response). Stable disease for at least 12 weeks was seen in an additional eight patients (clinical benefit rate 36.4%). CONCLUSION Sagopilone was well tolerated with mild haematological toxicity and sensory neuropathy. Unlike other epothilones, it shows activity against melanoma even in pretreated patients. Further clinical testing is warranted.
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Shim H, Yoon J, Hwang J, Bae W, Cho S, Chung I. Randomized phase II study of gabapentin alone versus gabapentin plus tramadol for the management of oxaliplatin-induced peripheral neuropathy. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.tps315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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160
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Yoon J, Hwang J, Bae W, Shim H, Nam T, Na K, Chung I. A phase II study of concurrent chemoradiotherapy with weekly docetaxel and cisplatin in advanced esophageal cancer. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e14549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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161
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Hwang J, Fisch M, Zhang H, Kallen MA, Routbort M, Lal L, Vierling J, Suarez-Almazor M. Hepatitis B screening and positivity prior to chemotherapy. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.9008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Hwang J, Shim H, Bae W, Yoon J, Cho S, Chung I. Role of bevacizumab on class III beta tubulin and HIF-1a in paclitaxel-treated gastric cancer. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e13656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Algazi AP, Weber JS, Andrews S, Urbas P, Arimura E, Hwang J, Sondak VK, Bastian B, Daud A. A phase I/II trial of DTIC and dasatinib in metastatic melanoma. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.8532] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Yhim H, Song E, Lee N, Hwang J, Shim H, Chung I, Park H, Park M, Yim C. The prognostic significance of tumor human papillomavirus status in patients with anal squamous cell carcinoma treated with combined chemoradiotherapy. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.3658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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165
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Bae S, Kim JE, Hwang J, Lee YS, Lee HH, Lee J, Lyoo IK, Renshaw PF, Yoon SJ. Increased prevalence of white matter hyperintensities in patients with panic disorder. J Psychopharmacol 2010; 24:717-23. [PMID: 18957476 DOI: 10.1177/0269881108098476] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The aim of the current study is to compare the prevalence, severity and location of cerebral white matter hyperintensities (WMH) between patients with panic disorder (PD) and healthy control subjects. Patients with PD (n = 24) and matched healthy control subjects (n = 24) were scanned using a 3.0 Tesla whole-body magnetic resonance scanner. Axial T2-weighted and fluid-attenuated inversion recovery images were acquired and evaluated for the prevalence, severity and location of WMH using the modified composite scale of Fazekas and Coffey and coded separately for deep and periventricular WMH. Logistic regression analyses were used to assess the association between WMH and the diagnosis of PD. A greater severity of total WMH was associated with a diagnosis of PD in a dose-dependent pattern (odds ratio [OR] = 8.8, P = 0.005 for mild WMH; OR = 27.7, P = 0.007 for moderate to severe WMH). Deep WMH, where most group differences originated, were predominantly located in the frontal region of the brain (n = 16 in PD, n = 1 in control). The current report is the first study to report an increased prevalence of WMH in patients with PD.
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Kolodiazhnyi T, Tachibana M, Kawaji H, Hwang J, Takayama-Muromachi E. Persistence of ferroelectricity in BaTiO3 through the insulator-metal transition. PHYSICAL REVIEW LETTERS 2010; 104:147602. [PMID: 20481963 DOI: 10.1103/physrevlett.104.147602] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2010] [Revised: 02/15/2010] [Indexed: 05/29/2023]
Abstract
The ferroelectric BaTiO(3) is a band-gap insulator. Itinerant electrons can be introduced in this material by doping, for example, with oxygen vacancies. Above a critical electron concentration of n(c) approximately 1 x 10(20) cm(-3), BaTiO(3-delta) becomes metallic. This immediately raises a question: Does metallic BaTiO(3-delta) still retain ferroelectricity? One may expect itinerant electrons to destroy ferroelectricity as they screen the long-range Coulomb interactions. We followed the phase transitions in BaTiO(3-delta) as a function of n far into metallic phase. Although their stability range decreases with n, the low-symmetry phases in metallic BaTiO(3-delta) are still retained up to an estimated concentration of n* approximately 1.9 x 10(21) cm(-3). Moreover, it appears that the itinerant electrons partially stabilize the ferroelectric phases in metallic BaTiO(3-delta) by screening strong crystal field perturbations caused by oxygen vacancies.
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Martin T, Sharma M, Damon L, Kaplan L, Guglielmo B, Working M, O'Malley R, Hwang J, Linker C. Voriconazole is safe and effective as prophylaxis for early and late fungal infections following allogeneic hematopoietic stem cell transplantation. Transpl Infect Dis 2010; 12:45-50. [DOI: 10.1111/j.1399-3062.2009.00455.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Hwang J, Puttagunta L, Green F, Shimanovsky A, Barrie J, Long R. Bronchial anthracofibrosis and tuberculosis in immigrants to Canada from the Indian subcontinent. Int J Tuberc Lung Dis 2010; 14:231-237. [PMID: 20074416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023] Open
Abstract
BACKGROUND Bronchial anthracofibrosis is a condition of proximal airway narrowing or obliteration and hyperpigmentation in persons with or without a history of occupational dust exposure. It is a bronchoscopic finding that is not uncommonly associated with pulmonary tuberculosis (PTB) in residents of South Korea, Iran and India. It is largely unrecognized in the Western world. METHODS We report the frequency of anthracofibrosis in foreign-born PTB patients who underwent bronchoscopy in two cities of Canada. We describe the composition of the pigment in the lungs of patients and speculate on the pathogenesis of anthracofibrosis-associated PTB. RESULTS Anthracofibrosis was present in 10/60 (16.7%) foreign-born patients who underwent bronchoscopy and had PTB between 2002 and 2006. Compared to patients from other Asian countries, patients from the Indian subcontinent were more likely to have anthracofibrosis (9/18, 50.0% vs. 1/26, 3.7%, P < 0.001). Carbonaceous particles, silica and silicates predominated in tissue specimens. Proximal airway narrowing appeared to be secondary to mixed dust- and smoke-related anthracofibrosis, PTB, or both. CONCLUSIONS Anthracofibrosis is not uncommon in immigrants to Canada from the Indian subcontinent with PTB. PTB may be a responsible or complicating condition in patients with anthracofibrosis.
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Asztalos SJ, Carosi G, Hagmann C, Kinion D, van Bibber K, Hotz M, Rosenberg LJ, Rybka G, Hoskins J, Hwang J, Sikivie P, Tanner DB, Bradley R, Clarke J. SQUID-based microwave cavity search for dark-matter axions. PHYSICAL REVIEW LETTERS 2010; 104:041301. [PMID: 20366699 DOI: 10.1103/physrevlett.104.041301] [Citation(s) in RCA: 105] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2009] [Indexed: 05/29/2023]
Abstract
Axions in the microeV mass range are a plausible cold dark-matter candidate and may be detected by their conversion into microwave photons in a resonant cavity immersed in a static magnetic field. We report the first result from such an axion search using a superconducting first-stage amplifier (SQUID) replacing a conventional GaAs field-effect transistor amplifier. This experiment excludes KSVZ dark-matter axions with masses between 3.3 microeV and 3.53 microeV and sets the stage for a definitive axion search utilizing near quantum-limited SQUID amplifiers.
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Yun M, Hwang J, Oh A, Han M, Kim H, Na H, Lee S. Comparison of two insertion techniques of the ProSeal laryngeal mask airway: standard versus 90° rotation in pediatric patients. Crit Care 2010. [PMCID: PMC2934363 DOI: 10.1186/cc8447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Knauer D, Hwang L, Lowe C, Hwang J, Norng M, Trieu V, Desai N. Albumin-Binding and Angiogenic Domains of SPARC Located at Its C-Terminus. Cancer Res 2009. [DOI: 10.1158/0008-5472.sabcs-09-2144] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: SPARC (Secreted Protein Acidic and Rich in Cysteine) is an albumin-binding glycoprotein overexpressed in breast cancer and is associated with poor prognosis and shorter overall survival. We have previously shown that SPARC expression appeared to correlate with response to nanoparticle albumin-bound (nab) paclitaxel (Abraxane) in head-and-neck and pancreatic-cancer patients. To further define the role of SPARC, recombinant-human SPARC (rhSPARC) was characterized to identify its albumin-binding and angiogenic domain.Materials and methods: The albumin-binding site on SPARC was defined by testing the binding of Alexa 488-labeled BSA to immobilized rhSPARC in a solid-phase-binding assay and in a competitive-binding assay in presence of increasing concentration of various SPARC-derived peptides. The angiogenic activity of rhSPARC was evaluated using a HUVEC tube-formation assay.Results: The SPARC albumin-binding assay revealed a pattern of saturable and specific binding with an estimated Kd of 700 µM very near the known plasma concentration of albumin (600 µM). Competitive binding with Cathepsin K-digested SPARC and SPARC-derived peptides defined the albumin-binding domain to be amino acids 209-223 in the C-terminal region. In the HUVEC tube-formation assay, rhSPARC was pro-angiogenic at 10 µg/ml and anti-angiogenic at 100 µg/ml. The angiogenic domain of SPARC was located to the C-terminal of SPARC.Discussion: The albumin-binding domain of SPARC was located to residues aa209-223, supporting its role as a target for nab-technology-based drug delivery. We confirmed that SPARC can promote angiogenesis at physiological concentrations, contributing to the role of SPARC in a more aggressive tumor phenotype. The angiogenic domain of SPARC is located within a 54-aa sequence of its C-terminus. SPARC could be a potential therapeutic target and a biomarker for predicting response to nab-paclitaxel.
Citation Information: Cancer Res 2009;69(24 Suppl):Abstract nr 2144.
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Ro Y, Huh J, Min S, Han S, Hwang J, Yang S, Kim DK, Kim C. Phenylephrine Attenuates Intra-Operative Hypothermia during Spinal Anaesthesia. J Int Med Res 2009; 37:1701-8. [DOI: 10.1177/147323000903700605] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Inadvertent hypothermia is common during spinal anaesthesia. This study was based on the hypothesis that phenylephrine might attenuate core hypothermia by inhibiting core-to-peripheral redistribution of body heat during spinal anaesthesia. In this prospective randomized study, 20 patients who underwent elective orthopaedic surgery under spinal anaesthesia were randomly assigned to receive either normal saline (control group) or continuously-infused phenylephrine 0.5 μg/kg per min (phenylephrine group). Core temperature, heart rate (HR) and mean arterial pressure (MAP) were monitored. Mean ± SE core temperature at the end of surgery was significantly higher in the phenylephrine-treated group compared with the control group (35.9 ± 0.1 °C versus 35.0 ± 0.1 °C, respectively), although there was no significant difference in baseline core temperature (both groups 36.3 ± 0.1 °C). Mean HR and MAP were not significantly different between the two groups. In conclusion, continuously-infused phenylephrine attenuated core hypothermia during spinal anaesthesia without any haemodynamic complications.
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Wang Y, Chang Y, Chen H, Chang C, Hsu W, Liu D, Hwang J. The Variation of Cervical Spine Curvature during Treatment for Nasopharyngeal Cancer. Int J Radiat Oncol Biol Phys 2009. [DOI: 10.1016/j.ijrobp.2009.07.973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Barajas RF, Rubenstein JL, Chang JS, Hwang J, Cha S. Diffusion-weighted MR imaging derived apparent diffusion coefficient is predictive of clinical outcome in primary central nervous system lymphoma. AJNR Am J Neuroradiol 2009; 31:60-6. [PMID: 19729544 DOI: 10.3174/ajnr.a1750] [Citation(s) in RCA: 167] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE There is evidence that increased tumor cellular density within diagnostic specimens of primary central nervous system lymphoma (PCNSL) may have significant prognostic implications. Because cellular density may influence measurements of apparent diffusion coefficient (ADC) by using diffusion-weighted MR imaging (DWI), we hypothesized that ADC measured from contrast-enhancing regions might correlate with clinical outcome in patients with PCNSL. MATERIALS AND METHODS PCNSL tumors from 18 immunocompetent patients, treated uniformly with methotrexate-based chemotherapy, were studied with pretherapeutic DWI. Enhancing lesions were diagnosed by pathologic analysis as high-grade B-cell lymphomas. Regions of interest were placed around all enhancing lesions allowing calculation of mean, 25th percentile (ADC(25%)), and minimum ADC values. Histopathologic tumor cellularity was quantitatively measured in all patients. High and low ADC groups were stratified by the median ADC value of the cohort. The Welch t test assessed differences between groups. The Pearson correlation examined relationships between ADC measurements and tumor cellular density. Single and multivariable survival analysis was performed. RESULTS We detected significant intra- and intertumor heterogeneity in ADC measurements. An inverse correlation between cellular density and ADC measurements was observed (P < .05). ADC(25%) measurements less than the median value of 692 (low ADC group) were associated with significantly shorter progression-free and overall survival. Patients with improved clinical outcome were noted to exhibit a significant decrease in ADC measurements following high-dose methotrexate chemotherapy. CONCLUSIONS Our study provides evidence that ADC measurements within contrast-enhancing regions of PCNSL tumors may provide noninvasive insight into clinical outcome.
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Cho S, Sim H, Hwang J, Bae W, Song S, Nam T, Na K, Chung I. 6561 Concurrent chemoradiotherapy with weekly docetaxel and cisplatin in advanced esophageal cancer. EJC Suppl 2009. [DOI: 10.1016/s1359-6349(09)71282-0] [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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