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Lammoza N, Ratnakanthan P, Moran T, O'Sullivan P, Gould R, Langenberg F, O'Donnell K, Berman I, Upton A, Joshi S. CTCA Acquired At Elevated Heart Rates Using Triggered End Systolic Scanning. J Cardiovasc Comput Tomogr 2021. [DOI: 10.1016/j.jcct.2021.06.194] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Du L, Yau C, Brown-Swigart L, Gould R, Krings G, Hirst GL, Bedrosian I, Layman RM, Carter JM, Klein M, Venters S, Shad S, van der Noordaa M, Chien AJ, Haddad T, Isaacs C, Pusztai L, Albain K, Nanda R, Tripathy D, Liu MC, Boughey J, Schwab R, Hylton N, DeMichele A, Perlmutter J, Yee D, Berry D, Van't Veer L, Valero V, Esserman LJ, Symmans WF. Predicted sensitivity to endocrine therapy for stage II-III hormone receptor-positive and HER2-negative (HR+/HER2-) breast cancer before chemo-endocrine therapy. Ann Oncol 2021; 32:642-651. [PMID: 33617937 DOI: 10.1016/j.annonc.2021.02.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 02/07/2021] [Accepted: 02/13/2021] [Indexed: 01/30/2023] Open
Abstract
BACKGROUND We proposed that a test for sensitivity to the adjuvant endocrine therapy component of treatment for patients with stage II-III breast cancer (SET2,3) should measure transcription related to estrogen and progesterone receptors (SETER/PR index) adjusted for a baseline prognostic index (BPI) combining clinical tumor and nodal stage with molecular subtype by RNA4 (ESR1, PGR, ERBB2, and AURKA). PATIENTS AND METHODS Patients with clinically high-risk, hormone receptor-positive (HR+), human epidermal growth factor receptor 2 (HER2)-negative (HR+/HER2-) breast cancer received neoadjuvant taxane-anthracycline chemotherapy, surgery with measurement of residual cancer burden (RCB), and then adjuvant endocrine therapy. SET2,3 was measured from pre-treatment tumor biopsies, evaluated first in an MD Anderson Cancer Center (MDACC) cohort (n = 307, 11 years' follow-up, U133A microarrays), cut point was determined, and then independent, blinded evaluation was carried out in the I-SPY2 trial (n = 268, high-risk MammaPrint result, 3.8 years' follow-up, Agilent-44K microarrays, NCI Clinical Trials ID: NCT01042379). Primary outcome measure was distant relapse-free survival. Multivariate Cox regression models tested prognostic independence of SET2,3 relative to RCB and other molecular prognostic signatures, and whether other prognostic signatures could substitute for SETER/PR or RNA4 components of SET2,3. RESULTS SET2,3 added independent prognostic information to RCB in the MDACC cohort: SET2,3 [hazard ratio (HR) 0.23, P = 0.004] and RCB (HR 1.77, P < 0.001); and the I-SPY2 trial: SET2,3 (HR 0.27, P = 0.031) and RCB (HR 1.68, P = 0.008). SET2,3 provided similar prognostic information irrespective of whether RCB-II or RCB-III after chemotherapy, and in both luminal subtypes. Conversely, RCB was most strongly prognostic in cancers with low SET2,3 status (MDACC P < 0.001, I-SPY2 P < 0.001). Other molecular signatures were not independently prognostic; they could effectively substitute for RNA4 subtype within the BPI component of SET2,3, but they could not effectively substitute for SETER/PR index. CONCLUSIONS SET2,3 added independent prognostic information to chemotherapy response (RCB) and baseline prognostic score or subtype. Approximately 40% of patients with clinically high-risk HR+/HER2- disease had high SET2,3 and could be considered for clinical trials of neoadjuvant endocrine-based treatment.
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Affiliation(s)
- L Du
- Department of Translational Molecular Pathology, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - C Yau
- Department of Surgery, University of California, San Francisco, USA
| | - L Brown-Swigart
- Department of Pathology, University of California, San Francisco, USA
| | - R Gould
- Department of Translational Molecular Pathology, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - G Krings
- Department of Pathology, University of California, San Francisco, USA
| | - G L Hirst
- Department of Surgery, University of California, San Francisco, USA
| | - I Bedrosian
- Department of Breast Surgery, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - R M Layman
- Department of Breast Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - J M Carter
- Department of Pathology, Mayo Clinic, Rochester, USA
| | - M Klein
- Department of Pathology, University of Minnesota, Minneapolis, USA
| | - S Venters
- Department of Surgery, University of California, San Francisco, USA
| | - S Shad
- Department of Surgery, University of California, San Francisco, USA
| | | | - A J Chien
- Department of Medicine, University of California, San Francisco, USA
| | - T Haddad
- Department of Medicine, Mayo Clinic, Rochester, USA
| | - C Isaacs
- Department of Medicine, Georgetown University, Washington, USA
| | - L Pusztai
- Department of Medicine, Yale University School of Medicine, New Haven, USA
| | - K Albain
- Department of Medicine, Loyola University, Chicago, USA
| | - R Nanda
- Department of Medicine, University of Chicago, Chicago, USA
| | - D Tripathy
- Department of Breast Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - M C Liu
- Department of Medicine, Mayo Clinic, Rochester, USA
| | - J Boughey
- Department of Surgery, Mayo Clinic, Rochester, USA
| | - R Schwab
- Department of Medicine, University of California, San Diego, USA
| | - N Hylton
- Department of Radiology, University of California, San Francisco, USA
| | - A DeMichele
- Department of Medicine, Perelman School of Medicine, University of Pennsylvania, San Philadelphia, USA
| | | | - D Yee
- Department of Medicine, University of Minnesota, Minneapolis, USA
| | - D Berry
- Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - L Van't Veer
- Department of Pathology, University of California, San Francisco, USA
| | - V Valero
- Department of Breast Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - L J Esserman
- Department of Surgery, University of California, San Francisco, USA
| | - W F Symmans
- Department of Translational Molecular Pathology, The University of Texas MD Anderson Cancer Center, Houston, USA; Department of Pathology, The University of Texas MD Anderson Cancer Center, San Francisco, USA.
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Lammoza N, Ratnakanthan P, Moran T, Gould R, Langenberg F, O'Sullivan P, O'Donnell K, Berman I, Ling Y, Upton A, Joshi S. CTCA Acquired at Elevated Heart Rates Using Triggered End Systolic Scanning. Heart Lung Circ 2021. [DOI: 10.1016/j.hlc.2021.06.205] [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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Page J, Walters R, Gould R, Wakschlag L, Norton E. 0989 Examining The Role Of Toddler Sleep Quality On Wake EEG And Language Ability. Sleep 2020. [DOI: 10.1093/sleep/zsaa056.985] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
Sleep and the development of language are prominent concerns of many parents and until recently, many have examined these concerns tangentially. Children with developmental delays/disabilities have shown to have impaired sleep and poor sleep quality, and impairments or changes in sleep quality may play a prominent role in the acquisition of language and neuronal oscillatory patterns. This study examines the role of child sleep quality paired with a normed measure of language and wake electroencephalography (EEG). Examining the role of child sleep quality with language ability and wake EEG may provide nascent incremental utility to understanding the influences of sleep on healthy development.
Methods
Data from 109 toddlers (age range 24 to 30.5 m, M = 26.83 ± 1.58 m, 52% male) from the Brief Infant Sleep Questionnaire (BISQ), Mullen Scales of Early Learning (MSEL), and continuous EEG were collected and analyzed. EEG was recorded (32 electrode cap BioSemi) while toddlers sat in a booster seat and watched a silent video. Data were analyzed in RStudio and Matlab to examine toddler’s sleep quality (infant sleep and parent behaviors) and relations with the MSEL and EEG (controlling for child age and gender).
Results
Means and standard deviations appeared within expected limits based on the range of each variable. Toddlers with slow-developing language were associated with relatively poor sleep quality, explaining 9.75% of the variance. We find preliminary evidence to suggest a potential sleep disruption around the time when a child is undergoing a rapid expansion in their vocabulary (expressive language). Toddler’s sleep quality and language acquisition were also correlated with wake EEG (alpha and beta).
Conclusion
Sleep is regarded as an essential component supporting the myriad changes observed in early development. Sleep quality fundamentally influences healthy development across domains. Here, we showed child sleep quality is highly associated with toddler’s language ability, and wake EEG, providing new insights into the developing brain.
Support
National Institutes of Health R01DC016273, R01MH107652-03S1, and Johnson & Johnson Consumer Inc., Skillman, NJ, USA.
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Affiliation(s)
- J Page
- Northwestern University, Chicago, IL
| | | | - R Gould
- Johnson & Johnson Consumer Inc, New Brunswick, NJ
| | | | - E Norton
- Northwestern University, Chicago, IL
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Singh P, Bedrosian I, Ha M, Shen Y, Du L, Gould R, Symmans F. 48P Association of a genomic index of sensitivity to endocrine therapy with disease-free survival in breast cancer. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.03.182] [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: 10/24/2022] Open
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Wallace O, Accorsi A, Barnes R, Cacace A, Cadavid D, Chang A, Eyerman D, Gould R, Kazmirski S, Maglio J, Mellion M, Rahl P, Robertson A, Rojas A, Ronco L, Shen N, Thompson L, Valentine E. P.43Targeting DUX4 expression, the root cause of FSHD: identification of a drug target and development candidate. Neuromuscul Disord 2019. [DOI: 10.1016/j.nmd.2019.06.072] [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: 11/15/2022]
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Marczyk M, Fu C, Lau R, Du L, Trevarton AJ, Sinn BV, Gould RE, Symmans WF, Hatzis C. Abstract P4-08-20: Pre-analytical effects of FFPE extraction methods on targeted and whole transcriptome sequencing assays for endocrine sensitivity in metastatic breast cancer. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p4-08-20] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: The clinical management of patients with metastatic HR-positive breast cancer is often uncertain due to decreased sensitivity to anti-estrogen therapy over time. Recently, we developed a targeted RNAseq based 18-transcript SET ER/PR assay of endocrine sensitivity from biopsies of metastatic cancer. In this work we assess the effect of pre-analytical factors, specifically RNA extraction methods for FFPE tissue samples, on the reliability of the targeted RNAseq assay.
Methods: FFPE blocks and matched fresh frozen (FF) sections from 12 tumors were collected at MD Anderson Cancer Center. RNA from FFPE slides was extracted in duplicate using three kits (Norgen, Qiagen, Roche), and RNAseq libraries from all samples were prepared using Kapa Total RNAseq kit. Targeted RNA libraries were prepared using droplet-based PCR (RainDance), and also by transcriptome-wide RNAseq for comparison. Reads were mapped to genomic sequence using STAR and expression was quantified using RSEM. Expression data were normalized based on expression of 10 reference genes. The effect of FFPE RNA extraction kit on the reliability of the SET index was assessed using linear mixed effects model (LME) analysis, and agreement with FF was assessed using the concordance correlation coefficient (CCC).
Results: Analysis of the whole transcriptome RNAseq data confirmed minimal 3'-end transcript bias from FFPE samples, irrespective of transcript size or FFPE kit. All 18 genes included in the SET index had high overall concordance between FFPE and FF (median CCC percentile=98.8, range 57.2-99.9 for Norgen; similar for the other two kits) and relatively consistent bias across genes, as estimated by the random effects of the LME model. Furthermore, compared to random 18-gene indices, concordance in the SET index values between FF and FFPE was higher than 99.8% of the random samples, verifying the analytical reliability of the selected genes. For the targeted RNAseq assay, RNA from FFPE extracted with the Norgen kit showed the highest concordance compared to FF (CCC=0.956, 95%CI 0.871-0.985). In general, the analytical variation of SET from FFPE samples was greater than that from FF (1.71-2.71 fold greater), with the lowest variation associated with the Norgen kit. The SET index values from targeted RNAseq for both FF and FFPE samples were consistently lower compared to transcriptome-wide RNAseq but were highly correlated, with the Norgen kit having the highest correlation between targeted and transcriptome-wide RNAseq (rho=0.915).
Conclusions: All three FFPE RNA extraction kits have excellent analytical performance compared to FF samples. The Norgen kit may be marginally better yielding higher concordance with FF and lower analytical variation between replicates. All genes in the SET ER/PR showed very good analytical performance in comparison to random indices and individual genes. Targeted gene RNA sequencing appears very promising as a platform for clinical deployment of quantitative assays, showing only a small (fixable) bias compared to RNAseq.
Citation Format: Marczyk M, Fu C, Lau R, Du L, Trevarton AJ, Sinn BV, Gould RE, Symmans WF, Hatzis C. Pre-analytical effects of FFPE extraction methods on targeted and whole transcriptome sequencing assays for endocrine sensitivity in metastatic breast cancer [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P4-08-20.
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Affiliation(s)
- M Marczyk
- Yale School of Medicine, New Haven, CT; The University of Texas MD Anderson Cancer Center, Houston, TX; Charité Universitätsmedizin Berlin, Berlin, Germany; Silesian University of Technology, Gliwice, Poland
| | - C Fu
- Yale School of Medicine, New Haven, CT; The University of Texas MD Anderson Cancer Center, Houston, TX; Charité Universitätsmedizin Berlin, Berlin, Germany; Silesian University of Technology, Gliwice, Poland
| | - R Lau
- Yale School of Medicine, New Haven, CT; The University of Texas MD Anderson Cancer Center, Houston, TX; Charité Universitätsmedizin Berlin, Berlin, Germany; Silesian University of Technology, Gliwice, Poland
| | - L Du
- Yale School of Medicine, New Haven, CT; The University of Texas MD Anderson Cancer Center, Houston, TX; Charité Universitätsmedizin Berlin, Berlin, Germany; Silesian University of Technology, Gliwice, Poland
| | - AJ Trevarton
- Yale School of Medicine, New Haven, CT; The University of Texas MD Anderson Cancer Center, Houston, TX; Charité Universitätsmedizin Berlin, Berlin, Germany; Silesian University of Technology, Gliwice, Poland
| | - BV Sinn
- Yale School of Medicine, New Haven, CT; The University of Texas MD Anderson Cancer Center, Houston, TX; Charité Universitätsmedizin Berlin, Berlin, Germany; Silesian University of Technology, Gliwice, Poland
| | - RE Gould
- Yale School of Medicine, New Haven, CT; The University of Texas MD Anderson Cancer Center, Houston, TX; Charité Universitätsmedizin Berlin, Berlin, Germany; Silesian University of Technology, Gliwice, Poland
| | - WF Symmans
- Yale School of Medicine, New Haven, CT; The University of Texas MD Anderson Cancer Center, Houston, TX; Charité Universitätsmedizin Berlin, Berlin, Germany; Silesian University of Technology, Gliwice, Poland
| | - C Hatzis
- Yale School of Medicine, New Haven, CT; The University of Texas MD Anderson Cancer Center, Houston, TX; Charité Universitätsmedizin Berlin, Berlin, Germany; Silesian University of Technology, Gliwice, Poland
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Luen SJ, Salgado R, Dieci MV, Vingiani A, Curigliano G, Gould RE, Castaneda C, D'Alfonso T, Sanchez J, Cheng E, Andreopoulou E, Castillo M, Adams S, Demaria S, Symmans WF, Michiels S, Loi S. Prognostic implications of residual disease tumor-infiltrating lymphocytes and residual cancer burden in triple-negative breast cancer patients after neoadjuvant chemotherapy. Ann Oncol 2019; 30:236-242. [PMID: 30590484 DOI: 10.1093/annonc/mdy547] [Citation(s) in RCA: 101] [Impact Index Per Article: 20.2] [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] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND For primary triple-negative breast cancer (TNBC) treated with neoadjuvant chemotherapy (NAC), higher pretreatment tumor-infiltrating lymphocytes (TILs) correlates with increased pathologic complete response (pCR) rates, and improved survival. We evaluated the added prognostic value of residual disease (RD) TILs to residual cancer burden (RCB) in predicting survival post-NAC. PATIENTS AND METHODS We combined four TNBC NAC patient cohorts who did not achieve pCR. RD TILs were investigated for associations with recurrence-free survival (RFS), and overall survival (OS) using Cox models with stromal TILs as a continuous variable (per 10% increment). The likelihood ratio test was used to evaluate added prognostic value of RD TILs. RESULTS A total of 375 RD TNBC samples were evaluable for TILs and RCB. The median age was 50 years, with 62% receiving anthracycline/taxane chemotherapy. The RCB class after NAC was 11%, 50%, and 39% for I, II, and III, respectively. The median RD TIL level was 20% (IQR 10-40). There was a positive correlation between RD TIL levels and CD8+ T-cell density (ρ = 0.41). TIL levels were significantly lower with increasing post-NAC tumor (P = 0.005), nodal stage (P = 0.032), but did not differ by RCB class (P = 0.84). Higher RD TILs were significantly associated with improved RFS (HR: 0.86; 95% CI 0.79-0.92; P < 0.001), and improved OS (HR: 0.87; 95% CI 0.80-0.94; P < 0.001), and remained significant predictors in multivariate analysis (RFS P = 0.032; OS P = 0.038 for OS). RD TILs added significant prognostic value to multivariate models including RCB class (P < 0.001 for RFS; P = 0.021 for OS). The positive prognostic effect of RD TILs significantly differed by RCB class for RFS (PInt=0.003) and OS (PInt=0.008) with a greater magnitude of positive effect observed for RCB class II than class III. CONCLUSIONS TIL levels in TNBC RD are significantly associated with improved RFS and OS and add further prognostic information to RCB class, particularly in RCB class II.
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Affiliation(s)
- S J Luen
- Peter MacCallum Cancer Centre, University of Melbourne, Melbourne, Australia
| | - R Salgado
- Peter MacCallum Cancer Centre, University of Melbourne, Melbourne, Australia; Department of Pathology, GZA-ZNA Hospitals, Antwerp, Belgium
| | - M V Dieci
- University of Padova, Padova, Italy; Veneto Institute of Oncology IOV - IRCCS, Padua, Italy
| | - A Vingiani
- European Institute of Oncology IRCCS, Milan, Italy
| | - G Curigliano
- European Institute of Oncology IRCCS, Milan, Italy; University of Milano, Milan, Italy
| | - R E Gould
- MD Anderson Cancer Centre, Houston, USA
| | - C Castaneda
- Instituto Nacional de Enfermedades Neoplasicas, Lima, Peru
| | - T D'Alfonso
- Memorial Sloan Kettering Cancer Center, New York, USA
| | - J Sanchez
- Instituto Nacional de Enfermedades Neoplasicas, Lima, Peru
| | - E Cheng
- Department of Radiation Oncology and Pathology and Laboratory Medicine, Weill Cornell Medicine, New York, USA
| | - E Andreopoulou
- Department of Radiation Oncology and Pathology and Laboratory Medicine, Weill Cornell Medicine, New York, USA
| | - M Castillo
- Instituto Nacional de Enfermedades Neoplasicas, Lima, Peru
| | - S Adams
- New York University School of Medicine, New York, USA
| | - S Demaria
- Department of Radiation Oncology and Pathology and Laboratory Medicine, Weill Cornell Medicine, New York, USA
| | | | - S Michiels
- Service de Biostatistique et d'Epidémiologie, Gustave Roussy, University Paris-Sud, University Paris-Saclay, Villejuif, France
| | - S Loi
- Peter MacCallum Cancer Centre, University of Melbourne, Melbourne, Australia.
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Gould R, McFadden SL, Hughes CM. Radiation dose in paediatric cardiac catheterisation: A systematic literature review. Radiography (Lond) 2017; 23:358-364. [PMID: 28965901 DOI: 10.1016/j.radi.2017.02.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 02/01/2017] [Accepted: 02/03/2017] [Indexed: 12/23/2022]
Abstract
OBJECTIVES It is believed that children are more sensitive to ionising radiation than adults. This work reviewed the reported radiation dose estimates for paediatric cardiac catheterisation. A systematic literature review was performed by searching healthcare databases for studies reporting radiation dose using predetermined key words relating to children having cardiac catheterisation. The quality of publications was assessed using relevant Critical Appraisal Skills Programme questions and their reported radiation exposures were evaluated. KEY FINDINGS It is only in recent years that larger cohort observations have been undertaken. Although radiation dose from paediatric cardiac catheterisation has decreased in recent years, the literature indicated that it remains varied and potentially substantial. CONCLUSION Standardisation of weight categories and procedure types such as those recommended by the PiDRL project could help compare current and future radiation dose estimates.
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Affiliation(s)
- R Gould
- Institute of Nursing and Health Research, Ulster University, Jordanstown Campus, Shore Road, Newtownabbey, BT37 OQB, United Kingdom.
| | - S L McFadden
- Institute of Nursing and Health Research, Ulster University, Jordanstown Campus, Shore Road, Newtownabbey, BT37 OQB, United Kingdom
| | - C M Hughes
- Institute of Nursing and Health Research, Ulster University, Jordanstown Campus, Shore Road, Newtownabbey, BT37 OQB, United Kingdom
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Sinn BV, Tsai TH, Lau R, Fu C, Gould R, Murthy R, King TA, Hatzis C, Kwiatkowski DN, Valero V, Symmans WF. Abstract P6-09-23: SETER/PR - A robust 18-gene predictor of sensitivity to endocrine therapy in metastatic breast cancer. Cancer Res 2017. [DOI: 10.1158/1538-7445.sabcs16-p6-09-23] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Rationale: A robust index for gene expression related to activity of estrogen (ESR1) and progesterone (PGR) receptors could predict sensitivity to endocrine therapy in metastatic breast cancer.
Methods: Transcripts correlated with ESR1 and PGR expression in 389 hormone receptor-positive breast cancer samples (Affymetrix U133A microarrays) were ranked for reliability according to their pre-analytical (intratumoral heterogeneity, biopsy type) and analytical reproducibility. Eighteen target and ten reference genes were selected and summarized as the SETER/PR index. The SETER/PR index was evaluated in a different set of 140 biopsies from distant metastases of hormone receptor-positive and HER2-negative (HR+/HER2-) breast cancer, and in additional pre-analytical and analytical sample cohorts. Thereafter, SETER/PR was translated to a customized format for application to formalin-fixed and paraffin-embedded (FFPE) sections.
Results: Higher SETER/PR in a metastasis was associated with longer progression-free survival (PFS, 9 vs. 2 months) and overall survival (OS, 50 vs. 19 months) following endocrine therapy in the cohort with metastatic breast cancer (MBC) and relapsed disease (n=79), so a cut point was defined in that cohort. SETER/PR was also significantly associated with PFS after adjusting for PR status of the metastasis, presence of visceral metastases, number of previous relapse events, and clinical history of previous sensitivity to endocrine therapy (HR 0.485, 95%CI 0.265 – 0.889, p = 0.019). Technically, SETER/PR was highly reproducible under different pre-analytical and analytical conditions, including host organ contamination. The translated SETER/PR assay used a single 10 µm FFPE tissue section, did not require RNA purification, and represented the microarray results from matched fresh samples with excellent agreement (correlation = 0.980, n = 31).
Conclusion: The SETER/PR index is a new biomarker to predict PFS and OS for patients with HR+/HER2- MBC who receive endocrine therapy. The assay is applicable to FFPE tissue sections from small biopsies of metastases. Additional independent (blinded) validation studies will be necessary to confirm these results.Rationale: A robust index for gene expression related to activity of estrogen (ESR1) and progesterone (PGR) receptors could predict sensitivity to endocrine therapy in metastatic breast cancer.
Methods: Transcripts correlated with ESR1 and PGR expression in 389 hormone receptor-positive breast cancer samples (Affymetrix U133A microarrays) were ranked for reliability according to their pre-analytical (intratumoral heterogeneity, biopsy type) and analytical reproducibility. Eighteen target and ten reference genes were selected and summarized as the SETER/PR index. The SETER/PR index was evaluated in a different set of 140 biopsies from distant metastases of hormone receptor-positive and HER2-negative (HR+/HER2-) breast cancer, and in additional pre-analytical and analytical sample cohorts. Thereafter, SETER/PR was translated to a customized format for application to formalin-fixed and paraffin-embedded (FFPE) sections.
Results: Higher SETER/PR in a metastasis was associated with longer progression-free survival (PFS, 9 vs. 2 months) and overall survival (OS, 50 vs. 19 months) following endocrine therapy in the cohort with metastatic breast cancer (MBC) and relapsed disease (n=79), so a cut point was defined in that cohort. SETER/PR was also significantly associated with PFS after adjusting for PR status of the metastasis, presence of visceral metastases, number of previous relapse events, and clinical history of previous sensitivity to endocrine therapy (HR 0.485, 95%CI 0.265 – 0.889, p = 0.019). Technically, SETER/PR was highly reproducible under different pre-analytical and analytical conditions, including host organ contamination. The translated SETER/PR assay used a single 10 µm FFPE tissue section, did not require RNA purification, and represented the microarray results from matched fresh samples with excellent agreement (correlation = 0.980, n = 31).
Conclusion: The SETER/PR index is a new biomarker to predict PFS and OS for patients with HR+/HER2- MBC who receive endocrine therapy. The assay is applicable to FFPE tissue sections from small biopsies of metastases. Additional independent (blinded) validation studies will be necessary to confirm these results.
Citation Format: Sinn BV, Tsai T-H, Lau R, Fu C, Gould R, Murthy R, King TA, Hatzis C, Kwiatkowski DN, Valero V, Symmans WF. SETER/PR - A robust 18-gene predictor of sensitivity to endocrine therapy in metastatic breast cancer [abstract]. In: Proceedings of the 2016 San Antonio Breast Cancer Symposium; 2016 Dec 6-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2017;77(4 Suppl):Abstract nr P6-09-23.
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Affiliation(s)
- BV Sinn
- The University of Texas MD Anderson Cancer Center, Houston, TX; Brigham and Women's / Dana Farber Cancer Center, Boston, MA; Section of Breast Medical Oncology, Yale School of Medicine, Yale Cancer Center, New Haven, CT; Charité Universitätsmedizin Berlin, Berlin, Germany
| | - T-H Tsai
- The University of Texas MD Anderson Cancer Center, Houston, TX; Brigham and Women's / Dana Farber Cancer Center, Boston, MA; Section of Breast Medical Oncology, Yale School of Medicine, Yale Cancer Center, New Haven, CT; Charité Universitätsmedizin Berlin, Berlin, Germany
| | - R Lau
- The University of Texas MD Anderson Cancer Center, Houston, TX; Brigham and Women's / Dana Farber Cancer Center, Boston, MA; Section of Breast Medical Oncology, Yale School of Medicine, Yale Cancer Center, New Haven, CT; Charité Universitätsmedizin Berlin, Berlin, Germany
| | - C Fu
- The University of Texas MD Anderson Cancer Center, Houston, TX; Brigham and Women's / Dana Farber Cancer Center, Boston, MA; Section of Breast Medical Oncology, Yale School of Medicine, Yale Cancer Center, New Haven, CT; Charité Universitätsmedizin Berlin, Berlin, Germany
| | - R Gould
- The University of Texas MD Anderson Cancer Center, Houston, TX; Brigham and Women's / Dana Farber Cancer Center, Boston, MA; Section of Breast Medical Oncology, Yale School of Medicine, Yale Cancer Center, New Haven, CT; Charité Universitätsmedizin Berlin, Berlin, Germany
| | - R Murthy
- The University of Texas MD Anderson Cancer Center, Houston, TX; Brigham and Women's / Dana Farber Cancer Center, Boston, MA; Section of Breast Medical Oncology, Yale School of Medicine, Yale Cancer Center, New Haven, CT; Charité Universitätsmedizin Berlin, Berlin, Germany
| | - TA King
- The University of Texas MD Anderson Cancer Center, Houston, TX; Brigham and Women's / Dana Farber Cancer Center, Boston, MA; Section of Breast Medical Oncology, Yale School of Medicine, Yale Cancer Center, New Haven, CT; Charité Universitätsmedizin Berlin, Berlin, Germany
| | - C Hatzis
- The University of Texas MD Anderson Cancer Center, Houston, TX; Brigham and Women's / Dana Farber Cancer Center, Boston, MA; Section of Breast Medical Oncology, Yale School of Medicine, Yale Cancer Center, New Haven, CT; Charité Universitätsmedizin Berlin, Berlin, Germany
| | - DN Kwiatkowski
- The University of Texas MD Anderson Cancer Center, Houston, TX; Brigham and Women's / Dana Farber Cancer Center, Boston, MA; Section of Breast Medical Oncology, Yale School of Medicine, Yale Cancer Center, New Haven, CT; Charité Universitätsmedizin Berlin, Berlin, Germany
| | - V Valero
- The University of Texas MD Anderson Cancer Center, Houston, TX; Brigham and Women's / Dana Farber Cancer Center, Boston, MA; Section of Breast Medical Oncology, Yale School of Medicine, Yale Cancer Center, New Haven, CT; Charité Universitätsmedizin Berlin, Berlin, Germany
| | - WF Symmans
- The University of Texas MD Anderson Cancer Center, Houston, TX; Brigham and Women's / Dana Farber Cancer Center, Boston, MA; Section of Breast Medical Oncology, Yale School of Medicine, Yale Cancer Center, New Haven, CT; Charité Universitätsmedizin Berlin, Berlin, Germany
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Kohlbrenner R, Kolli K, Taylor A, Kohi M, Lehrman E, Fidelman N, LaBerge J, Kerlan R, Gould R. X-ray fluoroscopy imaging platform reduces patient radiation dose during uterine fibroid embolization. J Vasc Interv Radiol 2016. [DOI: 10.1016/j.jvir.2015.12.518] [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: 10/22/2022] Open
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12
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Kaikkonen R, Härkänen T, Rahkonen O, Gould R, Koskinen S. Explaining socioeconomic inequalities in work-ability during the three decades. Eur J Public Health 2015. [DOI: 10.1093/eurpub/ckv167.049] [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: 11/13/2022] Open
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13
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Polvinen A, Laaksonen M, Gould R, Lahelma E, Leinonen T, Martikainen P. Socioeconomic inequalities in cause-specific mortality after disability retirement due to different diseases. Scand J Public Health 2014; 43:159-68. [DOI: 10.1177/1403494814562597] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Aims: Socioeconomic inequalities in both disability retirement and mortality are large. The aim of this study was to examine socioeconomic differences in cause-specific mortality after disability retirement due to different diseases. Methods: We used administrative register data from various sources linked together by Statistics Finland and included an 11% sample of the Finnish population between the years 1987 and 2007. The data also include an 80% oversample of the deceased during the follow-up. The study included men and women aged 30-64 years at baseline and those who turned 30 during the follow-up. We used Cox regression analysis to examine socioeconomic differences in mortality after disability retirement. Results: Socioeconomic differences in mortality after disability retirement were smaller than in the population in general. However, manual workers had a higher risk of mortality than upper non-manual employees after disability retirement due to mental disorders and cardiovascular diseases, and among men also diseases of the nervous system. After all-cause disability retirement, manual workers ran a higher risk of cardiovascular and alcohol-related death. However, among men who retired due to mental disorders or cardiovascular diseases, differences in social class were found for all causes of death examined. For women, an opposite socioeconomic gradient in mortality after disability retirement from neoplasms was found. Conclusions: The disability retirement process leads to smaller socioeconomic differences in mortality compared with those generally found in the population. This suggests that the disability retirement system is likely to accurately identify chronic health problems with regard to socioeconomic status.
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Affiliation(s)
| | | | - R. Gould
- Finnish Centre for Pensions, Finland
| | - E. Lahelma
- Hjelt Institute, Department of Public Health, University of Helsinki, Finland
| | - T. Leinonen
- Population Research Unit, Department of Social Research, University of Helsinki, Finland
| | - P. Martikainen
- Population Research Unit, Department of Social Research, University of Helsinki, Finland
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Kohlbrenner R, Kolli KP, Taylor A, Kohi M, Fidelman N, LaBerge J, Kerlan R, Gould R. SU-C-18C-06: Radiation Dose Reduction in Body Interventional Radiology: Clinical Results Utilizing a New Imaging Acquisition and Processing Platform. Med Phys 2014. [DOI: 10.1118/1.4887840] [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: 11/07/2022] Open
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16
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Fayer R, Elsasser T, Gould R, Solano G, Urban J, Santin M. Blastocystis tropism in the pig intestine. Parasitol Res 2014; 113:1465-72. [DOI: 10.1007/s00436-014-3787-y] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2013] [Accepted: 01/28/2014] [Indexed: 11/29/2022]
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17
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Kaikkonen R, Härkänen T, Rahkonen O, Gould R, Koskinen S. Three decades of work ability and its main determinants. Eur J Public Health 2013. [DOI: 10.1093/eurpub/ckt123.167] [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: 11/15/2022] Open
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18
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Gould R, Utarnachitt R. Comparison of Direct versus Video Laryngoscopy for Tracheal Intubation in Aeromedical Transport Patients. Ann Emerg Med 2013. [DOI: 10.1016/j.annemergmed.2013.07.115] [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: 11/16/2022]
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19
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Polvinen A, Laaksonen M, Gould R, Lahelma E, Martikainen P. The contribution of different diseases to socioeconomic inequalities in disability retirement. Eur J Public Health 2013. [DOI: 10.1093/eurpub/ckt126.104] [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: 11/13/2022] Open
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20
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Laaksonen M, Blomgren J, Gould R. Sickness absence history before disability retirement: a register based case-control study. Eur J Public Health 2013. [DOI: 10.1093/eurpub/ckt126.103] [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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21
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Lau R, Sun H, Gould R, Hatzis C, Symmans W. Contribution of Analytical, Pre-Analytical and Intra-Tumoral Heterogeneity to Variance in Gene Expression Measurements from Human Breast Cancers. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt083.1] [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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22
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Makinen J, O’Rourke J, Choudary P, Gould R, Thiagalingam A, Hillis G, Chow C. Radiation Exposure in a Consecutive Series of Patients in Computed Tomography Coronary Angiography Using a Dual Source 128-Slice Computed Tomography Scanner. Heart Lung Circ 2012. [DOI: 10.1016/j.hlc.2012.05.540] [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: 11/25/2022]
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23
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Shepherd TM, Hess CP, Chin CT, Gould R, Dillon WP. Reducing patient radiation dose during CT-guided procedures: demonstration in spinal injections for pain. AJNR Am J Neuroradiol 2011; 32:1776-82. [PMID: 21920858 DOI: 10.3174/ajnr.a2634] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
BACKGROUND AND PURPOSE CT guidance may improve precision for diagnostic and therapeutic spinal injections, but it can increase patient radiation dose. This study examined the impact of reducing tube current on patient radiation exposure and the technical success for these procedures, by using axial acquisitions for short scan lengths and eliminating nonessential imaging. MATERIALS AND METHODS Our institutional review board approved retrospective analysis of records from 100 consecutive outpatients undergoing spinal injections for pain before and after the CT protocol modification to reduce radiation dose. Data collected included patient age and sex, response to injection, number of sites and spinal levels treated, injection type, performing physician, CT acquisition method, number of imaging series, tube current, scan length, and DLP. RESULTS Image contrast was reduced with the low-dose protocol, but this did not affect technical success or immediate pain relief. Mean DLP for all procedures decreased from 1458 ± 1022 to 199 ± 101 mGy · cm (P < .001). The range of radiologist-dependent DLP per procedure also was reduced significantly with the modified protocol. Selective nerve root blocks, lumbar injections, multiple injection sites, and the lack of prior imaging were each associated with a slightly higher DLP (<50 mGy · cm). CONCLUSIONS Radiation to patients undergoing CT-guided spinal injections can be decreased significantly without affecting outcome by reducing tube current, using axial acquisitions for short scan lengths, and eliminating nonessential imaging guidance. These measures also decrease variability in radiation doses between different practitioners and should be useful for other CT-guided procedures in radiology.
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Affiliation(s)
- T M Shepherd
- Neuroradiology Division, Department of Radiology and Biomedical Imaging, University of California, San Francisco, 94143-0628, USA
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24
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Gould R. TH-C-210A-02: Principles of Perfusion Measurement with CT. Med Phys 2009. [DOI: 10.1118/1.3182648] [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: 11/07/2022] Open
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25
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Ahola K, Gould R, Virtanen M, Honkonen T, Aromaa A, Lonnqvist J. Occupational burnout as a predictor of disability pension: a population-based cohort study. Occup Environ Med 2009; 66:284-90; discussion 282-3. [DOI: 10.1136/oem.2008.038935] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.0] [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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26
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Gould R. SU-AA-AUD A-01: Symposium in Memoriam of Deceased AAPM Charter Members. Med Phys 2008. [DOI: 10.1118/1.2961347] [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: 11/07/2022] Open
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27
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Gould R. WE-E-342-01: (Part I) Excerpts of Interviews of Coolidge Award Winners. Med Phys 2008. [DOI: 10.1118/1.2962800] [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: 11/07/2022] Open
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28
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Sikoski P, Banks M, Gould R, Young R, Wallace J, Nader M. Comparison of rectal and infrared thermometry for obtaining body temperature in cynomolgus macaques (Macaca fascicularis). J Med Primatol 2007; 36:381-4. [DOI: 10.1111/j.1600-0684.2007.00214.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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29
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Smith AB, Dillon WP, Gould R, Wintermark M. Radiation dose-reduction strategies for neuroradiology CT protocols. AJNR Am J Neuroradiol 2007; 28:1628-32. [PMID: 17893208 PMCID: PMC8134195 DOI: 10.3174/ajnr.a0814] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2007] [Accepted: 08/07/2007] [Indexed: 11/07/2022]
Abstract
Within the past 2 decades, the number of CT examinations performed has increased almost 10-fold. This is in large part due to advances in multidetector-row CT technology, which now allows faster image acquisition and improved isotropic imaging. The increased use, along with multidetector technique, has led to a significantly increased radiation dose to the patient from CT studies. This places increased responsibility on the radiologist to ensure that CT examinations are indicated and that the "as low as reasonably achievable" concept is adhered to. Neuroradiologists are familiar with factors that affect patient dose such as pitch, milliamperes, kilovolt peak (kVp), collimation, but with increasing attention being given to dose reduction, they are looking for additional ways to further reduce the radiation associated with their CT protocols. In response to increasing concern, CT manufacturers have developed dose-reduction tools, such as dose modulation, in which the tube current is adjusted along with the CT acquisition, according to patient's attenuation. This review will describe the available techniques for reducing dose associated with neuroradiologic CT imaging protocols.
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Affiliation(s)
- A B Smith
- Department of Radiology, Neuroradiology Section, University of California, San Francisco, CA 94143-0628, USA
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30
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Gould R. SU-AA-ValA-01: Reflections of the Founding of the AAPM. Med Phys 2006. [DOI: 10.1118/1.2240115] [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: 11/07/2022] Open
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31
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Gould R. Colloquium C08: Fast axonal transport, neurofilament phosphorylation and synaptic transmission. J Neurochem 2005. [DOI: 10.1111/j.1474-1644.2005.03230_4.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: 11/28/2022]
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32
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Lavretsky H, Mistry R, Bastani R, Gould R, Gokhman I, Huang D, Maxwell A, McDermott C, Rosansky J, Jarvik L. Symptoms of depression and anxiety predict mortality in elderly veterans enrolled in the UPBEAT program. Int J Geriatr Psychiatry 2003; 18:183-4. [PMID: 12571829 DOI: 10.1002/gps.706] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- H Lavretsky
- Department of Psychiatry and Biobehavioral Sciences, UCLA-Neuropsychiatric Institute and Hospital, 760 Westwood Plaza, Room 37-425, Los Angeles, CA 90095, USA.
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Thomas R, Smith KC, Gould R, Gower SM, Binns MM, Breen M. Molecular cytogenetic analysis of a novel high-grade canine T-lymphoblastic lymphoma demonstrating co-expression of CD3 and CD79a cell markers. Chromosome Res 2002; 9:649-57. [PMID: 11778688 DOI: 10.1023/a:1012904307579] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [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: 11/12/2022]
Abstract
We present the molecular cytogenetic analysis of a novel case of canine lymphoma, in a nine-year-old entire male collie cross retriever dog that presented with an enlarged prescapular lymph node. A diagnosis of high-grade lymphoblastic lymphoma was made by histological evaluation of fixed lymph node biopsy sections, whilst immunohistochemical analyses demonstrated co-expression of B- and T-cell antigens (CD79a and CD3) by 95% of lymphomatous cells. Comparative genomic hybridisation (CGH) analysis detected loss of dog chromosomes 11, 30 and 38 and gain of chromosome 36 within the lymphoma biopsy specimen. These findings correlated with direct cytogenetic analysis of tumour metaphases using whole chromosome paint probes representing each of these four chromosomes. This study represents the first report of the combined application of both direct and indirect cytogenetic techniques for the analysis of recurrent chromosome aberrations in canine cancer.
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Affiliation(s)
- R Thomas
- Genetics Section, Animal Health Trust, Newmarket, Suffolk, UK.
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Gould R, Abramson I, Galasko D, Salmon D. Rate of cognitive change in Alzheimer's disease: methodological approaches using random effects models. J Int Neuropsychol Soc 2001; 7:813-24. [PMID: 11771624] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
Subtraction of serial scores, Least Squares Estimators, and Best Linear Unbiased Predictors (BLUPs) were compared for estimating rates of cognitive change for Mini-Mental State Exam (MMSE) and Dementia Rating Scale (DRS) scores for 299 probable Alzheimer's disease patients. The BLUPs provided cleaner group estimates of subjects' intercepts and slopes and are preferred. Regression analysis of the BLUP estimates of rate of change indicated that steeper declines were associated with higher levels of education and older age at onset. These effects were much smaller than those due to estimated initial cognitive test score. Differences in longitudinal metric characteristics of the MMSE and DRS were found, with the DRS yielding more precise change estimates. We discuss modeling these longitudinal data, and discuss use of the estimates of rate of change and intercept as data in their own right.
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Affiliation(s)
- R Gould
- Department of Statistics, University of California, Los Angeles 90095-1554, USA.
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35
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Barrow JC, Nantermet PG, Selnick HG, Glass KL, Ngo PL, Young MB, Pellicore JM, Breslin MJ, Hutchinson JH, Freidinger RM, Condra C, Karczewski J, Bednar RA, Gaul SL, Stern A, Gould R, Connolly TM. Discovery and initial structure-activity relationships of trisubstituted ureas as thrombin receptor (PAR-1) antagonists. Bioorg Med Chem Lett 2001; 11:2691-6. [PMID: 11591503 DOI: 10.1016/s0960-894x(01)00538-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Thrombin is the most potent agonist of platelet activation, and its effects are predominantly mediated by platelet thrombin receptors. Therefore, antagonists of the thrombin receptor have potential utility for the treatment of thrombotic disorders. Screening of combinatorial libraries revealed 2 to be a potent antagonist of the thrombin receptor. Modifications of this structure produced 11k, which inhibits thrombin receptor stimulated secretion and aggregation of platelets.
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Affiliation(s)
- J C Barrow
- Department of Medicinal Chemistry, Merck Research Laboratories, West Point, PA 19486, USA.
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Liu Q, Guan XM, Martin WJ, McDonald TP, Clements MK, Jiang Q, Zeng Z, Jacobson M, Williams DL, Yu H, Bomford D, Figueroa D, Mallee J, Wang R, Evans J, Gould R, Austin CP. Identification and characterization of novel mammalian neuropeptide FF-like peptides that attenuate morphine-induced antinociception. J Biol Chem 2001; 276:36961-9. [PMID: 11481330 DOI: 10.1074/jbc.m105308200] [Citation(s) in RCA: 217] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The two mammalian neuropeptides NPFF and NPAF have been shown to have important roles in nociception, anxiety, learning and memory, and cardiovascular reflex. Two receptors (FF1 and FF2) have been molecularly identified for NPFF and NPAF. We have now characterized a novel gene designated NPVF that encodes two neuropeptides highly similar to NPFF. NPVF mRNA was detected specifically in a region between the dorsomedial and ventromedial hypothalamic nuclei. NPVF-derived peptides displayed higher affinity for FF1 than NPFF-derived peptides, but showed poor agonist activity for FF2. Following intracerebral ventricular administration, a NPVF-derived peptide blocked morphine-induced analgesia more potently than NPFF in both acute and inflammatory models of pain. In situ hybridization analysis revealed distinct expression patterns of FF1 and FF2 in the rat central nervous system. FF1 was broadly distributed, with the highest levels found in specific regions of the limbic system and the brainstem where NPVF-producing neurons were shown to project. FF2, in contrast, was mostly expressed in the spinal cord and some regions of the thalamus. These results indicate that the endogenous ligands for FF1 and FF2 are NPVF- and NPFF-derived peptides, respectively, and suggest that the NPVF/FF1 system may be an important part of endogenous anti-opioid mechanism.
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Affiliation(s)
- Q Liu
- Department of Pharmacology, Merck Research Laboratories, West Point, Pennsylvania 19486, USA.
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Affiliation(s)
- L March
- Department of Education, Nutrition, Restaurant, Hotel, and Institution Management, Texas Tech University, Lubbock, USA
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Kominski G, Andersen R, Bastani R, Gould R, Hackman C, Huang D, Jarvik L, Maxwell A, Moye J, Olsen E, Rohrbaugh R, Rosansky J, Taylor S, Van Stone W. UPBEAT: the impact of a psychogeriatric intervention in VA medical centers. Unified Psychogeriatric Biopsychosocial Evaluation and Treatment. Med Care 2001; 39:500-12. [PMID: 11317098 DOI: 10.1097/00005650-200105000-00010] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [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: 11/26/2022]
Abstract
BACKGROUND The Unified Psychogeriatric Biopsychosocial Evaluation and Treatment (UPBEAT) program provides individualized interdisciplinary mental health treatment and care coordination to elderly veterans whose comorbid depression, anxiety, or alcohol abuse may result in overuse of inpatient services and underuse of outpatient services. OBJECTIVES To determine whether proactive screening of hospitalized patients can identify unrecognized comorbid psychiatric conditions and whether comprehensive assessment and psychogeriatric intervention can improve care while reducing inpatient use. DESIGN Randomized trial. SUBJECTS Veterans aged 60 and older hospitalized for nonpsychiatric medical or surgical treatment in 9 VA sites (UPBEAT, 814; usual care, 873). MEASURES The Mental Health Inventory (MHI) anxiety and depression subscales, the Alcohol Use Disorder Identification Test (AUDIT) scores, RAND 36-Item Health Survey Short Form (SF-36), inpatient days and costs, ambulatory care clinic stops and costs, and mortality and readmission rates. RESULTS Mental health and general health status scores improved equally from baseline to 12-month follow-up in both groups. UPBEAT increased outpatient costs by $1,171 (P <0.001) per patient, but lowered inpatient costs by $3,027 (P = 0.017), for an overall savings of $1,856 (P = 0.156). Inpatient savings were attributable to fewer bed days of care (3.30 days; P = 0.016) rather than fewer admissions. Patients with 1 or more pre-enrollment and postenrollment hospitalizations had the greatest overall savings ($6,015; P = 0.069). CONCLUSIONS UPBEAT appears to accelerate the transition from inpatient to outpatient care for acute nonpsychiatric admissions. Care coordination and increased access to ambulatory psychiatric services produces similar improvement in mental health and general health status as usual care.
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Affiliation(s)
- G Kominski
- UCLA School of Public Health, Los Angeles, CA, USA.
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Abstract
The objective of this investigation was to determine whether nonmammalian myelin basic protein contained charge isomers resulting from extensive posttranslational modifications as seen in mammalian MBP. Four charge isomer components from dogfish MBP have been isolated. These forms arise by phosphorylation and deamidation modifications. Components C1, C2 and C3 have been characterized. We are currently characterizing component C8. Dogfish MBP is less cationic than mammalian MBP and has about 50% lower mobility on a basic pH gel electrophoresis relative to human and to bovine MBP. The mammalian component C1, which is unmodified, is modified in the dogfish by phosphorylation. The reduced electrophoretic mobility is largely attributable to the charge reduction resulting from phosphorylation in serine 72, 83, and 120 or 121 in C1, and C3. In component C2, two or three phosphate groups were distributed among residues 134, 138 and 139. It was found that dogfish amino acid residue 30 was a lysine residue and not a glutamate residue as reported in the literature.
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Affiliation(s)
- R Zand
- Department of Biological Chemistry, University of Michigan, Ann Arbor 48109-1055, USA
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La Fontaine S, Theophilos MB, Firth SD, Gould R, Parton RG, Mercer JF. Effect of the toxic milk mutation (tx) on the function and intracellular localization of Wnd, the murine homologue of the Wilson copper ATPase. Hum Mol Genet 2001; 10:361-70. [PMID: 11157799 DOI: 10.1093/hmg/10.4.361] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.5] [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: 11/14/2022] Open
Abstract
Wilson disease is an autosomal recessive copper transport disorder resulting from defective biliary excretion of copper and subsequent hepatic copper accumulation and liver failure if not treated. The disease is caused by mutations in the ATP7B (WND) gene, which is expressed predominantly in the liver and encodes a copper-transporting P-type ATPase that is structurally and functionally similar to the Menkes protein (MNK), which is defective in the X-linked copper transport disorder Menkes disease. The toxic milk (tx) mouse has a clinical phenotype similar to Wilson disease patients and, recently, the tx mutation within the murine WND homologue (WND:) of this mouse was identified, establishing it as an animal model for Wilson disease. In this study, cDNA constructs encoding the wild-type (Wnd-wt) and mutant (Wnd-tx) Wilson proteins (Wnd) were generated and expressed in Chinese hamster ovary (CHO) cells. The tx mutation disrupted the copper-induced relocalization of Wnd in CHO cells and abrogated Wnd-mediated copper resistance of transfected CHO cells. In addition, co-localization experiments demonstrated that while Wnd and MNK are located in the trans-Golgi network in basal copper conditions, with elevated copper, these proteins are sorted to different destinations within the same cell. Ultrastructural studies showed that with elevated copper levels, Wnd accumulated in large multi-vesicular structures resembling late endosomes that may represent a novel compartment for copper transport. The data presented provide further support for a relationship between copper transport activity and the copper-induced relocalization response of mammalian copper ATPases, and an explanation at a molecular level for the observed phenotype of tx mice.
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Affiliation(s)
- S La Fontaine
- Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, VIC 3052, Australia
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Gillooly DJ, Morrow IC, Lindsay M, Gould R, Bryant NJ, Gaullier JM, Parton RG, Stenmark H. Localization of phosphatidylinositol 3-phosphate in yeast and mammalian cells. EMBO J 2000; 19:4577-88. [PMID: 10970851 PMCID: PMC302054 DOI: 10.1093/emboj/19.17.4577] [Citation(s) in RCA: 844] [Impact Index Per Article: 35.2] [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] [Indexed: 11/13/2022] Open
Abstract
Phosphatidylinositol 3-kinase (PI3K) regulates several vital cellular processes, including signal transduction and membrane trafficking. In order to study the intracellular localization of the PI3K product, phosphatidylinositol 3-phosphate [PI(3)P], we constructed a probe consisting of two PI(3)P-binding FYVE domains. The probe was found to bind specifically, and with high affinity, to PI(3)P both in vitro and in vivo. When expressed in fibroblasts, a tagged probe localized to endosomes, as detected by fluorescence microscopy. Electron microscopy of untransfected fibroblasts showed that PI(3)P is highly enriched on early endosomes and in the internal vesicles of multivesicular endosomes. While yeast cells deficient in PI3K activity (vps15 and vps34 mutants) were not labelled, PI(3)P was found on intralumenal vesicles of endosomes and vacuoles of wild-type yeast. vps27Delta yeast cells, which have impaired endosome to vacuole trafficking, showed a decreased vacuolar labelling and increased endosome labelling. Thus PI(3)P follows a conserved intralumenal degradation pathway, and its generation, accessibility and turnover are likely to play a crucial role in defining the early endosome and the subsequent steps leading to multivesicular endosome formation.
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Affiliation(s)
- D J Gillooly
- Department of Biochemistry, Institute for Cancer Research, The Norwegian Radium Hospital, Montebello, 0310 Oslo, Norway
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Greenberg HE, Wissel P, Barrett J, Barchowsky A, Gould R, Farrell D, Panebianco D, Hand E, Gillen L, Goldberg MR, Bjornsson TD. Antiplatelet effects of MK-852, a platelet fibrinogen receptor antagonist, in healthy volunteers. J Clin Pharmacol 2000; 40:496-507. [PMID: 10806603 DOI: 10.1177/00912700022009116] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [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: 11/16/2022]
Abstract
MK-852, a cyclic heptapeptide, is a potent platelet fibrinogen receptor antagonist. When administered to normal healthy male subjects by 1- and 4-hour constant rate intravenous infusions, it provides a generally well-tolerated and reversible means of inhibition of platelet function. At infusion rates of 1 microgram/kg/min for 1 hour and 0.44 microgram/kg/min for 4 hours, respectively, MK-852 extended baseline bleeding time by greater than 2.2-fold and 2.6-fold, inhibited ADP-induced platelet aggregation by 76% and 69%, and inhibited collagen-induced platelet aggregation by 65% and 67%, respectively. The pharmacokinetics of MK-852 include an elimination half-life of approximately 2 hours, total clearance of about 150 ml/min, and volume of distribution of about 18 liters. Examination of the relationship between MK-852 whole-blood concentration in vitro and inhibition of platelet aggregation showed an EC50 of about 55 ng/ml and a Hill coefficient of 1.55. The infusions were generally well tolerated, with no study drug-related changes in blood counts or biochemical profiles.
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Affiliation(s)
- H E Greenberg
- Department of Medicine, Jefferson Medical College, Philadelphia, Pennsylvania 19107, USA
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Avrin DE, Andriole KP, Yin L, Gould R, Arenson RL. Simulation of disaster recovery of a picture archiving and communications system using off-site hierarchal storage management. J Digit Imaging 2000; 13:168-70. [PMID: 10847390 PMCID: PMC3453250 DOI: 10.1007/bf03167652] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
The purpose of this communication is to report on the testing of the disaster recovery capability of our hierarchical storage management (HSM) system. Disaster recovery implementation is a requirement of every mission-critical information technology project. Picture archiving and communications systems (PACS) certainly falls into this category, even though the counterpart, conventional film archive, has no protection against fire, for example. We have implemented a method for hierarchical storage with wavelet technology that maximizes on-site case storage (using lossy compression), retains bit-preserved image data for legal purposes, provides an off-site backup (lossless bit-preserving wavelet transform), and provides for disaster recovery. Recovery from a natural (earthquake and subsequent fire) or technical (system crash and data loss) disaster was simulated by attempting to restore from the off-site image and database backup to clean core PACS components. The only existing loaded software was the operating system. The database application was reloaded locally, and then the database contents and image store were loaded from the off-site component of the HSM system. The following measurements were analyzed: (1) the ability to recover all data; (2) the integrity of the recovered database and image data; (3) the time to recover the database relative to the number of studies and age of the archive, as well as bandwidth between the local and remote site; and (4) the time to recover image data relative to compression ratio, number of studies, number of images, and time depth of the archive. This HSM system, which maximizes on-site storage, maintains a legal record, and provides off-site backup, also facilitates disaster recovery for a PACS.
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Affiliation(s)
- D E Avrin
- Department of Radiology, University of California, San Francisco 94143-0628, USA.
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Gould R, Freund C, Palmer F, Knapp PE, Huang J, Morrison H, Feinstein DL. Messenger RNAs for kinesins and dynein are located in neural processes. Biol Bull 1999; 197:259-260. [PMID: 10573845 DOI: 10.2307/1542638] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Affiliation(s)
- R Gould
- NYS Institute for Basic Research, Staten Island, USA
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Majumdar S, Lin J, Link T, Millard J, Augat P, Ouyang X, Newitt D, Gould R, Kothari M, Genant H. Fractal analysis of radiographs: assessment of trabecular bone structure and prediction of elastic modulus and strength. Med Phys 1999; 26:1330-40. [PMID: 10435535 DOI: 10.1118/1.598628] [Citation(s) in RCA: 84] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
The purpose of this study was to determine whether fractal dimension of radiographs provide measures of trabecular bone structure which correlate with bone mineral density (BMD) and bone biomechanics, and whether these relationships depend on the technique used to calculate the fractal dimension. Eighty seven cubic specimen of human trabecular bone were obtained from the vertebrae and femur. The cubes were radiographed along all three orientations--superior-inferior (SI), medial-lateral (ML), and anterior-posterior (AP), digitized, corrected for background variations, and fractal based techniques were applied to quantify trabecular structure. Three different techniques namely, semivariance, surface area, and power spectral methods were used. The specimens were tested in compression along three orientations and the Young's modulus (YM) was determined. Compressive strength was measured along the SI direction. Quantitative computed tomography was used to measure trabecular BMD. High-resolution magnetic-resonance images were used to obtain three-dimensional measures of trabecular architecture such as the apparent bone volume fraction, trabecular thickness, spacing, and number. The measures of trabecular structure computed in the different directions showed significant differences (p<0.05). The correlation between BMD, YM, strength, and the fractal dimension were direction and technique dependent. The trends of variation of the fractal dimension with BMD and biomechanical properties also depended on the technique and the range of resolutions over which the data was analyzed. The fractal dimension showed varying trends with bone mineral density changes, and these trends also depended on the range of frequencies over which the fractal dimension was measured. For example, using the power spectral method the fractal dimension increased with BMD when computed over a lower range of spatial frequencies and decreased for higher ranges. However, for the surface area technique the fractal dimension increased with increasing BMD. Fractal measures showed better correlation with trabecular spacing and number, compared to trabecular thickness. In a multivariate regression model inclusion of some of the fractal measures in addition to BMD improved the prediction of strength and elastic modulus. Thus, fractal based texture analysis of radiographs are technique dependent, but may be used to quantify trabecular structure and have a potentially valuable impact in the study of osteoporosis.
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Affiliation(s)
- S Majumdar
- Magnetic Resonance Science Center, Department of Radiology, University of California, San Francisco 94143, USA.
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Abstract
BACKGROUND The purpose of this study was to attempt to improve upon conventional coronal computed tomographic (CT) images of neonatal chest which to date have been made by reformatting thinly spaced axial images. MATERIALS AND METHODS Nine neonates were studied by direct coronal CT scans with the patients' long axis 90 degrees to the scanning table. They were studied to further define their thoracic abnormalities detected on plain film. Spiral CT and cine scan (Imatron) were utilized. RESULTS Congenital lung lesions such as congenital cystic adenomatoid malformation could not be diagnosed but their anatomical location could be accurately depicted, enabling easier surgical planning. The arterial supply to bronchopulmonary sequestrations was also identifiable. Tracheobronchial abnormalities such as tracheobronchus and bronchial atresia were also identifiable. Causing of air trapping, both intrinsic such as an atretic bronchus and extrinsic such as vascular compression were readily demonstrated. CONCLUSION With neither special devices nor paraphernalia, the described method of direct coronal CT scans were both feasible and provided significant information. This technique allows for improved assessment of the tracheobronchial tree and more accurate detection, localization, and characteristics of lesions adjacent to the diaphragm.
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Affiliation(s)
- I O Rencken
- Department of Radiology, University of California at San Francisco, 505 Parnassus Avenue, San Francisco, CA 94143-0628, USA
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Armstrong-Evans M, Litt M, McArthur MA, Willey B, Cann D, Liska S, Nusinowitz S, Gould R, Blacklock A, Low DE, McGeer A. Control of transmission of vancomycin-resistant Enterococcus faecium in a long-term-care facility. Infect Control Hosp Epidemiol 1999; 20:312-7. [PMID: 10349946 DOI: 10.1086/501623] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.2] [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: 11/04/2022]
Abstract
OBJECTIVES To describe the investigation and control of transmission of vancomycin-resistant enterococci (VRE) in a residential long-term-care (LTC) setting. OUTBREAK INVESTIGATION: A strain of vancomycin-resistant Enterococcus faecium not previously isolated in Ontario colonized five residents of a 254-bed LTC facility in Toronto. The index case was identified when VRE was isolated from a urine culture taken after admission to a local hospital. Screening of rectal swabs from all 235 residents identified four others who were colonized with the same strain of E faecium. CONTROL MEASURES Colonized residents were cohorted. VRE precautions were established as follows: gown and gloves for resident contact, restriction of contact between colonized and noncolonized residents, no sharing of personal equipment, and daily double-cleaning of residents' rooms and wheelchairs. OUTCOME Two colonized residents died of causes unrelated to VRE. Although bacitracin therapy (75,000 units four times a day x 14 days) failed to eradicate carriage in two of three surviving residents, both cleared their carriage within 7 weeks. Repeat rectal swabs from 224 residents (91%) 2 months after isolation precautions were discontinued and from 125 residents (51%) 9 months later identified no new cases. Total cost of investigation and control was $12,061 (Canadian). CONCLUSION VRE may be transmitted in LTC facilities, and colonized LTC residents could become important VRE reservoirs. Control of VRE transmission in LTC facilities can be achieved even with limited resources.
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Affiliation(s)
- M Armstrong-Evans
- Department of Microbiology, Mount Sinai and Princess Margaret Hospitals, University of Toronto, Ontario, Canada
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Goldkorn T, Balaban N, Matsukuma K, Chea V, Gould R, Last J, Chan C, Chavez C. EGF-Receptor phosphorylation and signaling are targeted by H2O2 redox stress. Am J Respir Cell Mol Biol 1998; 19:786-98. [PMID: 9806743 DOI: 10.1165/ajrcmb.19.5.3249] [Citation(s) in RCA: 154] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Inflammation of the respiratory tract is associated with the production of reactive oxygen species, such as hydrogen peroxide (H2O2) and superoxide (O2-), which contribute extensively to lung injury in diseases of the respiratory tract. The mechanisms and target molecules of these oxidants are mainly unknown but may involve modifications of growth-factor receptors. We have shown that H2O2 induces epidermal growth factor (EGF)-receptor tyrosine phosphorylation in intact cells as well as in membranes of A549 lung epithelial cells. On the whole, total phosphorylation of the EGF receptor induced by H2O2 was lower than that induced by the ligand EGF. Phosphorylation was confined to tyrosine residues and was inhibited by addition of genistein, indicating that it was due to the activation of protein tyrosine kinase (PTK). Phosphoamino acid analysis revealed that although the ligand, EGF, enhanced the phosphorylation of serine, threonine, and tyrosine residues, H2O2 preferentially enhanced tyrosine phosphorylation of the EGF receptor. Serine and threonine phosphorylation did not occur, and the turnover rate of the EGF receptor was slower after H2O2 exposure. Selective H2O2-mediated phosphorylation of tyrosine residues on the EGF receptor was sufficient to activate phosphorylation of an SH2-group-bearing substrate, phospholipase C-gamma (PLC-gamma), but did not increase mitogen-activated protein (MAP) kinase activity. Moreover, H2O2 exposure decreased protein kinase C (PKC)-alpha activity by causing translocation of PKC-alpha from the membrane to the cytoplasm. These studies provide novel insights into the capacity of a reactive oxidant, such as H2O2, to modulate EGF-receptor function and its downstream signaling. The H2O2-induced increase in tyrosine phosphorylation of the EGF receptor, and the receptor's slower rate of turnover and altered downstream phosphorylation signals may represent a mechanism by which EGF-receptor signaling can be modulated during inflammatory processes, thereby affecting cell proliferation and thus having implications in wound repair or tumor formation.
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Affiliation(s)
- T Goldkorn
- Department of Medicine, University of California, Davis School of Medicine, Davis, California, USA
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Gould R, Thompson R, Rakel B, Jensen J, Hasselman E, Young L. Redesigning the RN and NA roles. Nurs Manag (Harrow) 1996; 27:37, 40-1. [PMID: 8632868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
To ensure optimal utilization of RNs, the nursing care delivery system in a surgical nursing division assessed the tasks that could be delegated to ancillary personnel. Nursing assistants completed competency-based training and after six months, several positive outcomes were evident: dramatic decreases in overtime, improved patient care and increased patient and staff satisfaction.
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