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SOC-III-05 What are the common predicted toxicities from target safety assessments? Toxicol Lett 2022. [DOI: 10.1016/j.toxlet.2022.07.139] [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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HLA-E-presented peptides as novel targets for HIV-1 therapy. J Virus Erad 2019. [DOI: 10.1016/s2055-6640(20)30227-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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High-throughput single-cell transcriptome analysis of immune cells from HIV-1 infected individuals before and after therapy. J Virus Erad 2017. [DOI: 10.1016/s2055-6640(20)30548-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Preclinical development of a bispecific HIV x CD3 DART molecule that redirects T cells to kill HIV envelope (env)-expressing cells. J Virus Erad 2017. [DOI: 10.1016/s2055-6640(20)30564-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Abstract P3-14-06: Evaluation of the therapeutic efficacy of a Rad6 small molecule inhibitor in triple negative breast cancer cells. Cancer Res 2016. [DOI: 10.1158/1538-7445.sabcs15-p3-14-06] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Triple negative breast cancers (TNBCs) lack estrogen and progesterone receptors and Her2/neu amplification, and are hence not treatable with therapies targeting these molecules. TNBCs have upregulated DNA damage response mechanisms, including the Rad6 postreplication repair (PRR) pathway, that potentially contribute to chemoresistance. Rad6 is a major component of the PRR pathway and its ubiquitin conjugating (UBC) activity is critical for its function. Rad6 expression is low in normal breast cells and tissues but the Rad6 homolog Rad6B is overexpressed in invasive, metastatic and chemoresistant BrCas. Constitutive overexpression of Rad6B in MCF10A cells induces resistance to cisplatin and doxorubicin. TCGA analysis of TNBC patient data showed an association between high Rad6B expression (but not Rad6A) and decreased overall survival. We recently reported the development of a novel Rad6-selective small molecule inhibitor (SMI#9) that inhibits Rad6 UBC activity, migration, and induces apoptosis in TNBC cells but has no effect on MCF10A cells. Since SMI#9 has limited aqueous solubility, in this study we synthesized a modified analog of SMI#9 to enable conjugation via a hydrolyzable ester bond to gold nanoparticle (GNP) and to improve delivery. GNP tethered SMI#9 (SMI#9-GNP) was characterized for purity, ligand conjugation and size by thermogravimetric analysis, atomic force microscopy, transmission electron microscopy, UV-Vis spectroscopy and zeta sizer, and for cellular uptake and drug release by FTIR and mass spectrometry. We compared the activities of SMI#9-GNP and free SMI#9 for cytotoxicity and intracellular localization in mesenchymal (MDA-MB-231 and SUM1315) and basal (MDA-MB-468 and HCC1937) subtypes of TNBC, and in MCF10A cells. Whereas free SMI#9 was cytotoxic to all TNBC cells, SMI#9-GNP demonstrated as good or better cytotoxicity than free SMI#9 only in mesenchymal TNBC cells. MCF10A cells were unaffected by both free and SMI#9-GNP. Consistent with cellular sensitivities, SMI#9-GNP is efficiently endocytosed and processed in lysosomes in mesenchymal TNBC cells, while uptake into basal TNBC cells is compromised by cell microenvironment induced SMI#9-GNP aggregation. SMI#9-GNP treatment induces mitochondrial dysfunction, and stabilization and hyperactivation of PARP-1 that was commensurate with autophagy (indicated by LC3-I to LC3-II conversion). Rad6 loss and PARP-1 hyperactivation are associated with mitochondrial dysfunction, and since inhibition of Rad6 induces both mitochondrial dysfunction and PARP-1 activation this implicates a potential novel role for Rad6 in linking these processes. In summary, our data show that SMI#9-GNP is a suitable delivery vehicle and that the SMI#9 released from GNP conjugate functions similarly as free SMI#9. Our data also illustrate how cell microenvironment induced changes in the physical properties of GNP-drug conjugates can have important implications in the application of nanoparticles in cancer therapy. Supported by NIH R21 CA178117.
Citation Format: Haynes B, Zhang Y, Li J, Petit S, Westwell A, Mao G, Shekhar M. Evaluation of the therapeutic efficacy of a Rad6 small molecule inhibitor in triple negative breast cancer cells. [abstract]. In: Proceedings of the Thirty-Eighth Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2015 Dec 8-12; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2016;76(4 Suppl):Abstract nr P3-14-06.
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Dual-affinity re-targeting (DART) proteins overcome viral diversity to deplete the latent HIV-1 reservoir. J Virus Erad 2015. [DOI: 10.1016/s2055-6640(20)31288-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Restricted isotype, distinct variable gene usage, and high rate of gp120 specificity of HIV-1 envelope-specific B cells in colostrum compared with those in blood of HIV-1-infected, lactating African women. Mucosal Immunol 2015; 8:316-26. [PMID: 25100291 PMCID: PMC4320043 DOI: 10.1038/mi.2014.69] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2014] [Accepted: 07/07/2014] [Indexed: 02/04/2023]
Abstract
A successful HIV-1 vaccine must elicit immune responses that impede mucosal virus transmission, though functional roles of protective HIV-1 Envelope (Env)-specific mucosal antibodies remain unclear. Colostrum is a rich source of readily accessible mucosal B cells that may help define the mucosal antibody response contributing to prevention of postnatal HIV-1 transmission. To examine the HIV-1 Env-specific colostrum B-cell repertoire, single B cells were isolated from 17 chronically HIV-infected, lactating women, producing 51 blood and 39 colostrum HIV-1 Env-specific B-cell antibodies. All HIV-1 Env-specific colostrum-derived antibodies were immunoglobulin (Ig)G1 isotype and had mean heavy chain complementarity-determining region 3 (CDR3) lengths and mutation frequencies similar to those isolated from blood. However, variable heavy chain (VH) gene subfamily 1(∼)69 usage was higher among colostrum than blood HIV-1 Env-reactive antibodies (49% vs. 20%, P=0.006, Fisher's exact test). Additionally, more HIV-1 Env-specific colostrum antibodies were gp120 specific than those isolated from blood (44% vs. 16%, P=0.005, Fisher's exact test). One cross-compartment HIV-1 Env-specific clonal B-cell lineage was identified. These unique characteristics of colostrum B-cell antibodies suggest selective homing of HIV-1-specific IgG1-secreting memory B cells to the mammary gland and have implications for targeting mucosal B-cell populations by vaccination.
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Role of Intestinal Microbiota in Shaping the B Cell Repertoire in HIV Infection and Env Vaccination. AIDS Res Hum Retroviruses 2014. [DOI: 10.1089/aid.2014.5023a.abstract] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Indirect Calorimetry (RMR) Utilized by the Registered Dietitian (RD) Improves Health and Behavioral Outcomes in Obese Adolescents Attending a Week-Long Residential Weight Loss Camp. J Acad Nutr Diet 2013. [DOI: 10.1016/j.jand.2013.06.088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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023 Feasibility and Efficiency of Strategies For Updating Clinical Practice Guidelines. BMJ Qual Saf 2013. [DOI: 10.1136/bmjqs-2013-002293.54] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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SAT0231 Diffusion tensor imaging and cogntive performance in NPSLE. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.3178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Abstract P3-08-04: Impact of CYP3A variation on estrone levels and breast cancer risk. Cancer Res 2012. [DOI: 10.1158/0008-5472.sabcs12-p3-08-04] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Epidemiological studies provide strong evidence for a role of endogenous sex steroids in the etiology of breast cancer. Our aim was to identify common variants in genes involved in sex steroid synthesis or metabolism that were associated with premenopausal hormone levels and breast cancer risk.
Methods: We measured urinary estrone glucuronide (E1G) and pregnanediol glucuronide (PG) using a protocol specifically developed to account for cyclic variation in hormone levels during the menstrual cycle, plasma sex hormone-binding globulin (SHBG) and androgenic precursors in up to 763 healthy premenopausal women. We genotyped 642 single nucleotide polymorphisms (SNPs) in these women; a single SNP was further tested for association with breast cancer risk in data from 10,551 breast cancer case patients and 17,535 control subjects. All statistical tests were two-sided.
Results: rs10273424 mapping approximately 50kb centromeric to the cytochrome P450 3A (CYP3A) cluster (7q22.1) was associated with a 21.8% reduction in E1G levels (P = 2.7 × 10−9) and a modest reduction in breast cancer risk in cases diagnosed at or before age 50 (OR = 0.91; P = 0.03) but not older cases (odds ratio (OR) = 1.01; P = 0.82). A rare non-synonymous SHBG SNP was associated with reduced plasma SHBG levels.
Conclusions: Genetic variation in non-coding sequences flanking the CYP3A locus contributes to variance in premenopausal E1G levels and breast cancer risk in younger cases. Since CYP3A4, the most predominantly expressed CYP3A gene, is responsible for metabolism of endogenous and exogenous hormones and hormonal agents such as tamoxifen, used in the treatment of breast cancer this association may have wider implications.
Citation Information: Cancer Res 2012;72(24 Suppl):Abstract nr P3-08-04.
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Abstract PD07-07: Prediction of antiproliferative response to lapatinib by HER3 in an exploratory analysis of HER2-non-amplified (HER2−) breast cancer in the MAPLE presurgical study (CRUK E/06/039). Cancer Res 2012. [DOI: 10.1158/0008-5472.sabcs12-pd07-07] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Aim: To identify pretreatment biomarker predictors of Ki67 response to lapatinib in women with HER2− primary breast cancer.
Background: Lapatinib is an EGFR/HER2 inhibitor. Its clinical use is restricted to HER2 overexpressing disease. The MAPLE (Molecular Antiproliferative Predictors of Lapatinib's Effects) presurgical window of opportunity study of lapatinib vs placebo was conducted in women with HER2-amplified (HER2+) or HER2− primary disease. Ki67 (primary end-point) was reduced by a geomean 46% (95%CI 23–63%, p = 0.002) and 27% (95%CI 8–42%, p = 0.008) in HER2+ and HER2− disease, respectively (Leary et al, AACR 2012). We have now assessed whether predictive biomarkers of the antiproliferative response in HER2− disease could be identified.
Methods: 121 primary breast cancer patients were randomized (3:1) to 14 days of 1500mg/d lapatinib or placebo before surgery. Biopsies were taken before treatment and at surgery. Ki67 responders were defined as having a >/=50% reduction in Ki67 compared to baseline (Ellis, P et al, Breast Cancer Res Treat 1998, 48, 107). ER, PgR, HER2, EGFR, pAKT, pERK1/2 (nuclear and cytoplasmic), stathmin and apoptosis (TUNEL) were assessed by IHC (+FISH for HER2[all cases]) and scored visually by continuous methods. HER2, HER3, epiregulin (epir), amphiregulin (amphir) and neuregulin (neur) were assessed by qrtPCR.
Results: Three of the 121 patients were excluded because of inadequate biopsy material. Ninety-one of the remaining 118 patients received lapatinib: 7/19 (37%) HER2+ cases and 10/72 (14%) HER2− cases were Ki67 responders. Thus while the proportion of Ki67 responders was higher for HER2+ disease there was a similar or higher absolute number of responders with HER2− disease. All of the following relates to patients with HER2− disease. None of the pretreatment levels of ER, PgR, pAKT, pERK1/2, EGFR, epir, amphir or neur were associated with Ki67 response (p > 0.20). However, HER3 (p = 0.01) and HER2 (p = 0.06) mRNA levels were associated with greater Ki67 response. There was a tendency for Ki67 response to be greater with lower baseline Ki67 (p = 0.07). Multivariate analysis showed only HER3 mRNA levels to be independently significant. HER2 and HER3 mRNA levels were highly correlated (rho = 0.67, p < 0.001), a relationship confirmed in 2 other datasets (Wang et al, Breast Cancer Res, 2011, 13, R92; Dunbier et al, submitted). All Ki67 responders were above the median for both HER3 and HER2 expression.
Conclusions: Lapatinib is antiproliferative in a subgroup of HER2− tumours. This exploratory analysis indicates that they are characterized by high HER3 expression. The possible importance of high HER2:HER3 heterodimers in predicting this response is supported by the relationship between HER2 and HER3 expression. Further exploration of lapatinib is merited in HER2− cases with high HER3 expression.
Citation Information: Cancer Res 2012;72(24 Suppl):Abstract nr PD07-07.
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Postnatally-transmitted HIV-1 variants are efficient at dendritic cell trans-infection and sensitive to autologous and heterologous neutralization. Retrovirology 2012. [PMCID: PMC3441685 DOI: 10.1186/1742-4690-9-s2-p148] [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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Comparison of the depth of vaccine-elicited HIV-1 Env epitope-specific CD8+ T lymphocyte responses. Retrovirology 2012. [PMCID: PMC3441297 DOI: 10.1186/1742-4690-9-s2-p288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
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DNA and recombinant adenovirus serotype 35 and 5 preventive HIV-1 vaccines with Env A inserts elicit cross-clade binding and V1V2 antibodies. Retrovirology 2012. [PMCID: PMC3442017 DOI: 10.1186/1742-4690-9-s2-p136] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Vaccine-elicited systemic and mucosal humoral responses of lactating rhesus monkeys vaccinated with the transmitted/founder HIV Envelope 1086C. Retrovirology 2012. [PMCID: PMC3441344 DOI: 10.1186/1742-4690-9-s2-o20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Using Human Single Chain Variable Fragment (scFv) Antibodies for Identification of Potential Allergens of Neurospora crassa. J Allergy Clin Immunol 2012. [DOI: 10.1016/j.jaci.2011.12.524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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P09-21 LB. Deep sequencing of HIV-1 from acute infection: low initial diversity, and rapid but variable CTL escape. Retrovirology 2009. [PMCID: PMC2767917 DOI: 10.1186/1742-4690-6-s3-p401] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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OA021-04. HIV-1 gp41 envelope MPER mutation altered epitope conformation in lipid and increased sensitivity to 2F5 and 4E10 neutralizing antibodies. Retrovirology 2009. [PMCID: PMC2767536 DOI: 10.1186/1742-4690-6-s3-o16] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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P01-01. The blood transcriptional response to early acute HIV infection is transient and responsive to antiretroviral therapy. Retrovirology 2009. [PMCID: PMC2767581 DOI: 10.1186/1742-4690-6-s3-p1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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P04-08. Monoclonal antibodies from patient with acute HIV-1 infection. Retrovirology 2009. [PMCID: PMC2767870 DOI: 10.1186/1742-4690-6-s3-p36] [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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P10-05. Suppression of human dendritic cell function during acute HIV infection. Retrovirology 2009. [PMCID: PMC2767622 DOI: 10.1186/1742-4690-6-s3-p136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Caractéristiques immuno-virologiques des patients « HIV controllers »: le rôle clé des lymphocytes T8. Rev Med Interne 2006. [DOI: 10.1016/j.revmed.2006.10.065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Use of membrane collectors in electrostatic precipitators. JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION (1995) 2001; 51:1401-1407. [PMID: 11686243 DOI: 10.1080/10473289.2001.10464372] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Membrane collection surfaces, developed and patented by researchers at Ohio University, were used to replace steel plates in a dry electrostatic precipitator (ESP). Such replacement facilitates tension-based rapping, which shears the adhered particle layer from the collector surface more effectively than hammer-based rapping. Tests were performed to measure the collection efficiency of the membranes and to quantify the potential improvements of this novel cleaning technique with respect to re-entrainment. Results indicate that even semiconductor materials (e.g., carbon fibers) collect ash nearly as efficiently as steel plates, potentially indicating that collection surface resistivity is primarily dictated by the accumulated ash layer and not by the underlying plate conductivity. In addition, virtually all sheared particles separated from the collecting membranes fell within the boundary layer of the membrane, indicating extremely low potential for re-entrainment.
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Effect of thymectomy on human peripheral blood T cell pools in myasthenia gravis. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2001; 166:2808-17. [PMID: 11160348 DOI: 10.4049/jimmunol.166.4.2808] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The human thymus is required for establishment of the T cell pool in fetal life, but postnatal thymectomy does not lead to immunodeficiency in humans. Because thymectomy in humans is performed for treatment of myasthenia gravis (MG), we have studied patients with MG for effects of thymectomy on peripheral blood (PB) naive (CD45RA(+), CD62L(+)) and memory (CD45RO(+)) T cells. We have also determined the effect of thymectomy on levels of PB cells containing signal joint TCR delta excision circles (TRECs), a molecular marker of thymus emigrants that have divided few times after leaving the thymus. In 17 nonthymectomized and 26 thymectomized MG patients studied at varying times after thymectomy (1 day to 41 years), we found no significant mean difference in PB T cell TREC levels between ages 40 and 80 years. However, both thymectomized and nonthymectomized MG patients had lower PB T cell TREC levels than did age-matched normal subjects (p < 0.0001 for both). These data demonstrated that MG itself or treatment for MG decreased thymopoiesis independent of thymectomy. Next, to control for disease activity and treatment, we prospectively studied 10 MG patients before and from 27 to 517 days after thymectomy. We found that thymectomy decreased CD4 or CD8 T cell TREC concentrations most when thymopoiesis was active before thymectomy (six of six patients), but had little effect in patients when thymopoiesis was minimal (four of four patients). In contrast, there was no significant effect of thymectomy on absolute numbers of naive PB T cells. Thus, in MG, removal of a thymus with active thymopoiesis resulted in a significant fall in PB TREC(+) T cells postthymectomy.
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Abstract
OBJECTIVE To document ocular penetration of oral tamoxifen in patients being administered systemic therapy by measuring intraocular and serum levels of the drug in a series of patients undergoing elective ocular surgery. DESIGN Nonrandomized, prospective, comparative trial. PARTICIPANTS Twenty-one eyes of 21 patients undergoing elective ocular surgery (cataract extraction or vitrectomy). Twenty patients were using the antiestrogen, tamoxifen, and one participant was not. Nine patients were excluded in the final analysis because of inadequate sample size. INTERVENTION Preoperative serum samples and perioperative aqueous samples, vitreous samples, or both were obtained for each patient, and these were analyzed for tamoxifen and its metabolites. Dilated fundus examination was performed before surgery on all patients. MAIN OUTCOME MEASURES Evidence of tamoxifen, its metabolites, or both in the samples. RESULTS Tamoxifen was detected in all analyzed serum samples (range, 82.4-290.0 ng/ml.) from patients taking the medication and was found to have penetrated into both vitreous (range, 0.5-7.8 ng/ml) and aqueous (range, 0.5-3.9 ng/ml) cavities. No relationship was found between serum and intraocular levels. CONCLUSIONS This study shows that tamoxifen penetrates intraocular fluids to varying degrees. The drug levels in aqueous and vitreous do not appear to correlate with serum levels. Evidence of tamoxifen retinopathy or keratopathy was not seen.
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The company they keep: the influence of peer relationships on adjustment to cystic fibrosis during adolescence. J Pediatr Nurs 2000; 15:175-82. [PMID: 10897555 DOI: 10.1053/jn.2000.6023] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A grounded theory approach was used to explore the influence of peer relationships on adjustment to cystic fibrosis (CF) in 15 adolescents. Discovering the course was the core category that captured the influence of peers on adjustment to CF. Four subcategories were identified: (1) losing ground, (2) being out of the loop, (3) finding a new company of friends, (4) fighting a never-ending battle. The downward progression of CF and increasing social interactions with peers with CF during hospitalization helped them learn CF was a lifelong disease with relentless demands. Interventions should focus on strategies for promoting peer support, a positive attitude, and hope to create a sense of belonging, social competence, and well-being.
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Hepatosplenic gamma-delta T-cell lymphoma as a late-onset posttransplant lymphoproliferative disorder in renal transplant recipients. Am J Clin Pathol 2000; 113:487-96. [PMID: 10761449 DOI: 10.1309/yttc-f55w-k9cp-epx5] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Abstract
We report 2 cases of renal transplant recipients in whom hepatosplenic gamma-delta T-cell lymphoma (gamma-delta HSTCL) developed 5 and 10 years after transplantation. Both patients had marked hepatosplenomegaly, B symptoms (weight loss, fever, and night sweats), and abnormal peripheral blood findings, including anemia in both, thrombocytopenia and leukoerythroblastic changes in 1, and leukocytosis in the other. Markedly atypical lymphoid infiltrate of intermediate to large cells was observed in the spleen, liver, and bone marrow. The malignant cells showed typical immunophenotype of gamma-delta T cells (CD2+, CD3+, CD4-, CD8-, CD7+, gamma-delta T-cell receptor-positive, and alpha-beta T-cell receptor-negative) with clonal T-cell receptor gene rearrangement and were of the V-delta-1 subset. In addition, the cells contained a cytolytic granule-associated protein, TIA-1, and Fas ligand, indicating cytotoxic T-cell differentiation. The malignant T cells in both cases were of host tissue origin. Both cases were negative for Epstein-Barr virus genome using Southern blot analysis. The patients did not respond to reduction of immunosuppression. Despite initial response to chemotherapy, both patients died within 6 months of diagnosis. Our findings indicate that gamma-delta HSTCL can occur as a late complication in transplant recipients.
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MESH Headings
- Adult
- DNA, Neoplasm/analysis
- Fas Ligand Protein
- Fatal Outcome
- Female
- Gene Rearrangement, delta-Chain T-Cell Antigen Receptor/genetics
- Humans
- Immunophenotyping
- In Situ Hybridization, Fluorescence
- Kidney Transplantation/adverse effects
- Liver Neoplasms/etiology
- Liver Neoplasms/immunology
- Liver Neoplasms/pathology
- Lymphoma, T-Cell/etiology
- Lymphoma, T-Cell/immunology
- Lymphoma, T-Cell/pathology
- Male
- Membrane Glycoproteins/metabolism
- Membrane Proteins/metabolism
- Middle Aged
- Poly(A)-Binding Proteins
- Polymerase Chain Reaction
- Proteins
- RNA-Binding Proteins/metabolism
- Receptors, Antigen, T-Cell, gamma-delta/genetics
- Receptors, Antigen, T-Cell, gamma-delta/immunology
- Receptors, Interleukin-2/blood
- Splenic Neoplasms/etiology
- Splenic Neoplasms/immunology
- Splenic Neoplasms/pathology
- T-Cell Intracellular Antigen-1
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Advances in evidence-based information resources for clinical practice. ACP JOURNAL CLUB 2000; 132:A11-4. [PMID: 10689385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
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Can it work? Does it work? Is it worth it? The testing of healthcareinterventions is evolving. BMJ (CLINICAL RESEARCH ED.) 1999; 319:652-3. [PMID: 10480802 PMCID: PMC1116525 DOI: 10.1136/bmj.319.7211.652] [Citation(s) in RCA: 228] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Abstract
Observations of the pharmacology of tamoxifen and related compounds have lead to the concept of selective estrogen receptor modulators (SERMs). This new class of drug displays estrogen agonist or antagonist effects in a tissue-dependent manner and appears to offer an alternative to hormone replacement therapy for the prevention and treatment of osteoporosis and cardiovascular disease in postmenopausal women. Moreover, the estrogen antagonist actions of SERMs on breast tissue may also provide a protective effect against breast cancer. Although tamoxifen therapy reduces plasma cholesterol levels and maintains bone density, it is also associated with an increased risk of endometrial cancer, pulmonary embolism and deep vein thrombosis. This has lead to the development of newer SERMs which will hopefully lack these adverse effects of tamoxifen. These compounds promise a new era of disease prevention in the aging woman and their therapeutic potential is currently being evaluated in large-scale clinical trials.
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Comparison of performance of interns completing the old (1993) and new interactive (1997) Advanced Trauma Life Support courses. THE JOURNAL OF TRAUMA 1999; 46:80-6. [PMID: 9932687 DOI: 10.1097/00005373-199901000-00013] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND The 1997 edition of the Advanced Trauma Life Support (ATLS) course emphasized interactivity as its major change. The impact of this change is assessed in this study. METHODS We compared two matched groups of 16 interns completing either the old (group I) or new (group II) ATLS course. Cognitive skills (40 standard ATLS questions plus 10 additional questions on airway and shock) and clinical trauma management skills (four trauma objective structured clinical examinations [OSCEs] on simulated trauma patients) were tested. OSCE station scores (standardized to a maximum of 20), priority scores (graded 1-7), organized approach global passing grades (graded 1-5), and initial assessment test station scores (graded 1-5) were compared. RESULTS Using ATLS criteria, three interns failed in each group. Post-ATLS examination question scores were similar (84.5+/-6.9 for group I, 85.9+/-7.1 for group II); scores for the airway and shock questions were higher but not different between the two groups. The four OSCE station mean scores varied between 13.9+/-2.0 and 15.4+/-2.1 for group I and were higher (p < 0.05) for group II (17.9+/-1.6 to 19.1+/-1.0). Priority scores were similar (group I, 6.3+/-1.1; group II, 6.4+/-1.2), but approach scores (3.9+/-0.1 for group I and 4.9+/-0.8 for group II) were lower in group I, as were the initial assessment test scores (2.9+/-0.2 for group I and 4.9+/-0.8 for group II). There were 8 honors grades in group I and 40 (p < 0.05) in group II. Interactive teaching, adult education principles, opportunities for discussion, provision of feedback, and stimulation of self-learning were rated more highly in the new course. CONCLUSION Using standard ATLS pass criteria, performance after the new and old ATLS courses was similar. Superior performances were measured using OSCE methodology for clinical trauma management skills after the new compared with the old ATLS course in this population of interns.
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Effect of basic prehospital trauma life support program on cognitive and trauma management skills. World J Surg 1998; 22:1192-6. [PMID: 9841742 DOI: 10.1007/s002689900543] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
We tested the effectiveness of a basic prehospital trauma life support (PHTLS) program by assessing cognitive performance and trauma management skills among prehospital trauma personnel. Fourteen subjects who completed a standard PHTLS course (group I) were compared to a matched group not completing a PHTLS program (group II). Cognitive performance was assessed on 50-item multiple choice examinations, and trauma skills management was assessed with four simulated trauma patients. Pre-PHTLS multiple choice questionnaire scores were similar (45.8 +/- 9.4% vs. 48.8 +/- 8.9% for groups I and II, respectively), but the post-PHTLS scores were higher in group I (80.4 +/- 5.9%) than in group II (52.6 +/- 4.9%). Pre-PHTLS simulated trauma patient performance scores (standardized to a maximum total of 20 for each station) were similar at all four stations for both groups, ranging from 7.9 to 10.4. The post-PHTLS scores were statistically significantly higher at all four stations for group I (range 16.0-19.0) compared to those for group II (range 8.0-11.1). The overall mean pre-PHTLS score for all four stations was 8.3 +/- 2.1 for group I and 8.8 +/- 2.0 (NS) for group II; the group I post-PHTLS mean score for the four stations was 17.1 +/- 2.7 (p < 0.05) compared to 9.1 +/- 2.3 for group II. Pre-PHTLS Adherence to Priority scores on a scale of 1 to 7 were similar (1.1 +/- 0.9 for group I and 1.2 +/- 1.0 for group II). Post-PHTLS group I Priority scores increased to 5.9 +/- 1.1. Group II (1.1 +/- 1.0) did not improve their post-PHTLS scores. The pre-PHTLS Organized Approach scores in the simulated trauma patients on a scale of 1 to 5 were 2.1 +/- 1.0 for group I and 1.9 +/- 1.2 for group II (NS) compared to 4.2 +/- 0.9 (p < 0.05) in group I and 2.0 +/- 0.8 in group II after PHTLS. This study demonstrates improved cognitive and trauma management skills performance among prehospital paramedical personnel who complete the basic PHTLS program.
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Tirapazamine with cisplatin in patients with advanced non-small-cell lung cancer: a phase II study. J Clin Oncol 1998; 16:3524-7. [PMID: 9817270 DOI: 10.1200/jco.1998.16.11.3524] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
PURPOSE A phase II study was conducted to evaluate the safety and efficacy of tirapazamine combined with cisplatin for the treatment of patients with advanced non-small-cell lung cancer (NSCLC). PATIENTS AND METHODS Forty-four patients with stage IIIB/IV NSCLC were treated with a combination of tirapazamine and cisplatin. Patients received tirapazamine 260 mg/m2 administered intravenously over 2 hours, followed 1 hour later by cisplatin 75 mg/m2 administered over an additional hour, repeated every 21 days. The duration of therapy was meant to be limited to four cycles for nonresponders and eight cycles for responders. RESULTS Ten of 44 patients (23%) showed a partial response. The estimated median survival for all patients was 37 weeks. Toxicities were treatable and included grade 3 nausea or vomiting (25%), fatigue (27.3%), and muscle cramps (4.5%). No dose reductions were necessary. CONCLUSION The results show that tirapazamine can safely be added to cisplatin. Both the median survival and response rate observed strongly suggest that tirapazamine with cisplatin is more active than cisplatin alone.
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Annual colonoscopy, chest radiography, and computed tomography of the liver did not prolong survival in patients with colorectal cancer. Gut 1998; 43:314. [PMID: 9863471 PMCID: PMC1727235 DOI: 10.1136/gut.43.3.314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/08/2022]
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Abstract
Hodgkin's disease rarely presents as obstructive jaundice. We report a case of Hodgkin's disease arising in periduodenallymph nodes, presenting with biliary obstruction, definitively diagnosed on cytologic material obtained by endosonographically-guided real-time fine needle aspiration biopsy and confirmed at laparotomy. The medical literature pertaining to the use of endosonography and fine needle aspiration biopsy for pancreatic lesions and abdominal lymphoma is reviewed. Currently available data support the use of fine needle aspiration biopsy in establishing the diagnosis of lymphoma. This case highlights the utility of endoscopic ultrasonography with endosonographically guided real-time fine needle aspiration biopsy in diagnosing and managing patients with extrahepatic biliary obstruction or suspected abdominal lymphoma. Pairing endosonographically guided real-time fine needle aspiration biopsy with on-site cytologic assessment and immediate specimen triage can lead to definitive diagnosis of abdominal lymphoma, avoiding surgical intervention in many cases.
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A comparative study of six commercial lipoprotein(a) assays in seventeen laboratories within the British Isles. Ann Clin Biochem 1996; 33 ( Pt 1):63-70. [PMID: 8929070 DOI: 10.1177/000456329603300110] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Seventeen laboratories in the British Isles participated in a study to compare six different commercially available immunoassays for serum lipoprotein(a) (Lp(a)) and to establish reasons for the variations in the measurement of serum Lp(a) concentrations. Pooled serum was distributed neat and after dilution at a central laboratory. In addition, the central laboratory sent unpooled serum sampled monthly from six healthy volunteers to each of the participating laboratories for 12 months. The assays all gave linear dilution curves which were parallel, although the reported values varied twofold. There were major differences in the values assigned to different manufacturers' calibrants which was not explained by whether the units employed were whole Lp(a), the protein moiety of Lp(a) or simply apolipoprotein(a). The coefficient of variation for the reported value of Lp(a) over 12 months was 33%. The component variation was 10% after adjustment for inter-laboratory and intra-laboratory variation. Some individuals clearly had a greater tendency to variable serum Lp(a) concentrations than others, but all the assays responded to this in the same way. Thus, the assays tested probably measured the same analyte. The problem of calibration could largely be addressed if agreement were reached by the manufacturers. Even with improvements in analytical precision it should be realized that multiple measurements of serum Lp(a) levels are necessary if the true mean value is to be appreciated. Individuals showing wide variation in serum Lp(a) may reward further study if its role is to be established.
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Evidence-based medicine. Lancet 1995; 346:1171. [PMID: 7475645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Effects of a new fish oil concentrate on plasma lipids and lipoproteins in patients with hypertriglyceridaemia. Eur J Clin Nutr 1994; 48:859-65. [PMID: 7889894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
OBJECTIVES The effect of a fish oil preparation, K-85, in which the omega-3 fatty acid content was concentrated to 92% of total fat, on serum lipid and lipoprotein concentrations was investigated in patients with primary hypertriglyceridaemia. DESIGN The study was a randomized, double-blind, placebo-controlled study. SETTING Seven centres participated in the study, five secondary referral centres and two general practices. SUBJECTS Men and women aged 18-70 years with fasting serum triglyceride concentrations between 2 and 10 mmol/l and fasting serum cholesterol concentrations > 5.2 mmol/l were studied. Patients with diabetes mellitus, hypothyroidism, serious illness in the previous 3 months or severe concurrent illness were excluded from the study, as were drug or alcohol abusers and pregnant and lactating women. Ninety-five subjects entered the study, 79 completed the study. INTERVENTIONS Patients were randomized to receive K-85 2 g twice daily or corn oil 2 g twice daily for 14 weeks. MAIN OUTCOME MEASUREMENTS The serum concentrations of triglycerides and cholesterol, very low-density lipoprotein (VLDL), low-density lipoprotein (LDL), high-density lipoprotein (HDL) and lipoprotein (a). Fasting blood glucose and blood pressure. RESULTS Serum triglycerides and VLDL-cholesterol were significantly lower in the group treated with K-85 than in the placebo group after 6, 10 and 14 weeks (all P < 0.01) and there was a decrease in the serum triglyceride concentration from 3.99 (2.94-9.47) to 2.87 (1.2-9.93) mmol/l (P < 0.001) and in VLDL-cholesterol from 1.47 (0.77-3.63) to 1.12 (0.21-3.67) mmol/l (P < 0.01) in patients receiving K-85. Serum HDL-cholesterol increased from 0.98 (0.95-1.01) to 1.11 (1.07-1.15) mmol/l (P < 0.01) in the patients with type IV hyperlipoproteinaemia but did not change in those with type IIb. Serum LDL-cholesterol, lipoprotein (a) and fasting blood glucose were unaffected by K-85. Diastolic blood pressure decreased from 86 +/- 11 to 80 +/- 12 mmHg (P < 0.02) and was also lower than in the placebo group (P < 0.05). The corn oil placebo did not affect any of the parameters. CONCLUSION K-85 is effective in lowering serum triglycerides and VLDL in patients with primary hypertriglyceridaemia and may have utility as a triglyceride-lowering agent.
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Biodistribution and kinetics of radiolabelled pyrrolidino-4-iodo-tamoxifen: prospects for pharmacokinetic studies using PET. JOURNAL OF NUCLEAR BIOLOGY AND MEDICINE (TURIN, ITALY : 1991) 1994; 38:96-8. [PMID: 7632777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
With a view to evaluating the role of PET imaging in early clinical studies of new anticancer drugs, we are investigating the recently developed antiestrogen compound pyrrolidino-4-iodo-tamoxifen (idoxifene). Preliminary experimental studies have been undertaken using [125,131I]idoxifene, following synthesis of a tributyl-stannyl-idoxifene precursor to facilitate radioiodination. We have investigated the tissue biodistribution and kinetics of [125I]idoxifene following i.v. infusion in hooded rats bearing the hormone-dependent transplantable mammary tumour OES.HR1. Clearance of idoxifene from the circulation is accompanied by an increase in uptake by tumour and uterus, to peak levels after 24 hours (0.33 +/- 0.037% dose/g (mean +/- 1 SD) and 0.40 +/- 0.033% dose/g, respectively). Highest uptake of idoxifene was found in the liver (11.0 +/- 0.8% dose/g), with a progressive fall after 24 hours consistent with hepatobiliary excretion of the radiotracer. No evidence of idoxifene metabolism was found in tissue extracts taken up to 48 hours. Whole body clearance of [131I]idoxifene was characterised by a single exponential decay (t1/2 = 140 hours) up to 350 hours post administration. We conclude that 124I-labelled idoxifene combined with PET imaging would facilitate human in vivo pharmacokinetic studies of this new anticancer drug and provide an opportunity to investigate relationships between drug uptake and tumour response.
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Reporting, updating, and correcting systematic reviews of the effects of health care. BMJ (CLINICAL RESEARCH ED.) 1994; 309:862-5. [PMID: 7950620 PMCID: PMC2541052 DOI: 10.1136/bmj.309.6958.862] [Citation(s) in RCA: 112] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The recent growth in the numbers of published systematic reviews reflects growing recognition of their importance for improving knowledge about the effects of health care. In Britain the NHS R&D Programme has established two centres to prepare systematic reviews of existing information, and the Cochrane Collaboration--an international network of individuals and institutions--evolved to produce systematic, periodically updated reviews of randomised controlled trials. The large amount of existing evidence that needs to be considered creates a problem for the reporting of systematic reviews: the need to ensure that methods and results of systematic reviews are adequately described has to be reconciled with the limited space available in printed journals. A possible solution is the use of electronic publications: reviews could be published simultaneously in a short, printed form and in a more detailed electronic form. Electronic publications also have the advantage of the ease with which reviews may be updated as new evidence becomes available or mistakes are identified.
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A postmarketing surveillance evaluation of quinapril in 3742 Canadian hypertensive patients: the ACCEPT Study. Accupril Canadian Clinical Evaluation and Patient Teaching. Clin Ther 1994; 16:838-53. [PMID: 7859244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The Accupril Canadian Clinical Evaluation and Patient Teaching (ACCEPT) study was a multicenter, 6-month, open-label, postmarketing surveillance study where the efficacy and safety of quinapril, an angiotensin-converting enzyme (ACE) inhibitor, was evaluated in a general population of patients with essential hypertension. Participating physicians followed their normal office procedures for the initiation of quinapril therapy (a dose of 10 mg QD in the majority of cases). The dose was titrated to blood pressure response, generally at 2-week intervals, for a maintenance dose of 10 mg QD to 20 mg QD in most cases (86% at 6 months) and not to exceed 40 mg QD. The use of concomitant antihypertensive medications was left to the discretion of the physician. By random assignment, physicians obtained patient informed consent on either a detailed form that listed possible quinapril side effects or a less specific form, which did not list particular side effects. The purpose of using two different forms was to assess any potential association between the frequency of adverse-event reporting and patient's awareness of quinapril side effects. The patients also received an educational package that provided general information on hypertension and lifestyle modifications known to reduce cardiovascular risk factors. An intent-to-treat analysis included data from 3742 patients in whom the median age was 56 years and the median duration of hypertension was 5 years. The demographic characteristics of these patients were similar to those identified in Canadian hypertensive patients in a recent population-based survey. Nearly 80% of the ACCEPT study patients had more than one cardiovascular risk factor, in addition to hypertension. Among 2979 patients receiving quinapril at 3 months, 77% were stabilized. Among 2517 patients continuing to receive quinapril at 6 months, 84% were stabilized. Greater declines in both diastolic and systolic blood pressures were evident among patients who continued to receive quinapril as part of an antihypertensive regimen than among those who discontinued quinapril treatment. Blood pressure responses to quinapril were similar in newly diagnosed patients and those with a history of hypertension. A total of 980 patients (26.2%) reported one or more adverse events. Cough was most frequently reported and was deemed as definitely related to quinapril therapy by the treating physician in 3.6% of cases. Serious adverse events occurred in 55 patients (1.5%) and were assessed as possibly related to quinapril in only three patients.(ABSTRACT TRUNCATED AT 400 WORDS)
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Alterations in the activity of reverse cholesterol transport: a contributing factor to the hyperlipidemia of nephrotic syndrome? Atherosclerosis 1994. [DOI: 10.1016/0021-9150(94)93936-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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