1
|
Ojeda-Porras AC, Roy V, Bourzikat O, Favetta P, Agrofoglio LA. Cobalt-assisted route to rare carbocyclic C-ribonucleosides. RSC Adv 2023; 13:30777-30786. [PMID: 37869399 PMCID: PMC10587889 DOI: 10.1039/d3ra04937j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 10/02/2023] [Indexed: 10/24/2023] Open
Abstract
(Re)emerging RNA viruses have been major threats to public health in the past years, and from the few drugs available, nucleoside analogues are still at the cornerstone of the antiviral therapy. Among them, the synthesis of carbocyclic C-nucleosides is suffering from long syntheses and poor yields. Herein we report a concise stereoselective synthesis of rare carbocyclic C-nucleosides (11a-l) bearing non-canonical nucleobases through a cobalt-assisted-route as key step starting from the optically pure (-)-cyclopentenone 1. This approach paves the route for novel carbocyclic C-nucleoside discovery.
Collapse
Affiliation(s)
- A C Ojeda-Porras
- Université d'Orléans et CNRS, ICOA, UMR 7311 F-45067 Orléans France
| | - V Roy
- Université d'Orléans et CNRS, ICOA, UMR 7311 F-45067 Orléans France
| | - O Bourzikat
- Université d'Orléans et CNRS, ICOA, UMR 7311 F-45067 Orléans France
| | - P Favetta
- Université d'Orléans et CNRS, ICOA, UMR 7311 F-45067 Orléans France
| | - L A Agrofoglio
- Université d'Orléans et CNRS, ICOA, UMR 7311 F-45067 Orléans France
| |
Collapse
|
2
|
Twum F, Tome J, Ledel E, Roy V, Mallhi AK, Aguirre D, Wei Y, Zhang J. The Diverging Trend in Exposure to Environmental Tobacco Smoke Among US Children. J Racial Ethn Health Disparities 2023:10.1007/s40615-023-01645-y. [PMID: 37326795 DOI: 10.1007/s40615-023-01645-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 11/04/2022] [Revised: 05/14/2023] [Accepted: 05/15/2023] [Indexed: 06/17/2023]
Abstract
OBJECTIVE Environmental tobacco smoke exposure (ETSE) was race/ethnicity-specific, but how the race/ethnicity-specific ETSE has changed over time, diverging or converging, remains unclear. We examined ETSE trends by race/ethnicity in US children aged 3-11 years. METHODS We analyzed the data of 9678 children who participated in the biennial National Health and Nutrition Examination Surveys, 1999-2018. ETSE was defined as serum cotinine ≥ 0.05 ng/ml, with ≥ 1 ng/ml as heavy exposure. For trend description, adjusted biennial prevalence ratios (abiPR: the ratio associated with a 2-year increase in time) were estimated by race/ethnicity. The prevalence ratios between races/ethnicities were used to quantify ethnoracial differences in different survey periods. Analyses were performed in 2021. RESULTS The overall ETSE prevalence was cut by almost half, from 61.59% (95% confidence interval = 56.55%, 66.62%) in the 1999-2004 survey to 37.61% (33.90%, 41.31%) in 2013-2018, exceeding the national 2020 health target (47.0%). However, the decrease occurred unequally between races/ethnicities. Heavy ETSE declined significantly in white [abiPR = 0.80 (0.74, 0.86)] and Hispanic children [0.83 (0.74, 0.93)], but insignificantly in black children [0.97 (0.92, 1.03)]. Consequently, the adjusted prevalence ratio between black children and white children increased from 0.82 (0.47, 1.44) in 1999-2004 to 2.73 (1.51, 4.92) in 2013-2018 for heavy ETSE. Hispanic children remained at the lowest risk throughout the study period. CONCLUSION Overall ETSE prevalence was cut by half between 1999 and 2018. However, due to uneven declines, the gaps between black children and others have expanded in heavy ETSE. Special vigilance is needed in preventive medicine practice with black children.
Collapse
Affiliation(s)
- Felix Twum
- Department of Biostatistics, Epidemiology and Environmental Health Sciences, Jiann-Ping Hsu College of Public Health, Georgia Southern University, Statesboro, GA, 30460, USA.
- The Dr. Lynn Cook Hartwig Public Health Program, School of Health Professions, The University of Southern Mississippi, Hattiesburg, MS, 39406, USA.
| | - Joana Tome
- Department of Biostatistics, Epidemiology and Environmental Health Sciences, Jiann-Ping Hsu College of Public Health, Georgia Southern University, Statesboro, GA, 30460, USA
| | - Erica Ledel
- Department of Biostatistics, Epidemiology and Environmental Health Sciences, Jiann-Ping Hsu College of Public Health, Georgia Southern University, Statesboro, GA, 30460, USA
| | - Victoria Roy
- Department of Biostatistics, Epidemiology and Environmental Health Sciences, Jiann-Ping Hsu College of Public Health, Georgia Southern University, Statesboro, GA, 30460, USA
| | - Arshpreet Kaur Mallhi
- Department of Biostatistics, Epidemiology and Environmental Health Sciences, Jiann-Ping Hsu College of Public Health, Georgia Southern University, Statesboro, GA, 30460, USA
| | - Diana Aguirre
- Department of Biostatistics, Epidemiology and Environmental Health Sciences, Jiann-Ping Hsu College of Public Health, Georgia Southern University, Statesboro, GA, 30460, USA
| | - Yudan Wei
- Department of Community Medicine, Mercer University School of Medicine, Macon, GA, 31207, USA
| | - Jian Zhang
- Department of Biostatistics, Epidemiology and Environmental Health Sciences, Jiann-Ping Hsu College of Public Health, Georgia Southern University, Statesboro, GA, 30460, USA
| |
Collapse
|
3
|
Bakeer M, Zubair A, Roy V. G-CSF causes decrease in peripheral blood platelet counts unrelated to leukapheresis during autologous stem cell mobilization. Cytotherapy 2019. [DOI: 10.1016/j.jcyt.2019.03.437] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
4
|
Taheri S, James S, Roy V, Decaëns T, Williams B, Anderson F, Rougerie R, Chang CH, Brown G, Cunha L, Stanton D, Da Silva E, Chen JH, Lemmon A, Moriarty Lemmon E, Bartz M, Baretta D, Barois I, Lapied E, Coulis M, Dupont L. Complex taxonomy of the ‘brush tail’ peregrine earthworm Pontoscolex corethrurus. Mol Phylogenet Evol 2018; 124:60-70. [DOI: 10.1016/j.ympev.2018.02.021] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 02/20/2018] [Accepted: 02/20/2018] [Indexed: 01/19/2023]
|
5
|
Ailawadhi S, Mikhael JR, LaPlant BR, Laumann KM, Kumar S, Roy V, Dingli D, Bergsagel PL, Buadi FK, Rajkumar SV, Fonseca R, Gertz MA, Kapoor P, Sher T, Hayman SR, Stewart AK, Dispenzieri A, Kyle RA, Gonsalves WI, Reeder CB, Lin Y, Go RS, Leung N, Kourelis T, Lust JA, Russell SJ, Chanan-Khan AA, Lacy MQ. Pomalidomide-dexamethasone in refractory multiple myeloma: long-term follow-up of a multi-cohort phase II clinical trial. Leukemia 2017; 32:719-728. [PMID: 28860655 DOI: 10.1038/leu.2017.258] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Revised: 06/07/2017] [Accepted: 07/05/2017] [Indexed: 11/09/2022]
Abstract
Despite therapeutic advances, multiple myeloma remains incurable, with limited options for patients with refractory disease. We conducted a large, multi-cohort clinical trial testing various doses and treatment schedules of pomalidomide and dexamethasone (Pom/dex) in patients with refractory multiple myeloma. Overall, 345 patients were enrolled to six cohorts based on number and type of prior lines of therapy, pomalidomide dose and schedule. Median prior lines of therapy were three with near universal prior exposure to proteasome inhibitors and/or immunomodulatory drugs. A confirmed response rate of 35% was noted for all cohorts (range 23-65%) with higher responses in cohorts with fewer prior lines of therapy. Median time to confirmed response was ⩽2 months and the longest progression-free survival and overall survival seen in any cohort were 13.1 and 47.9 months, respectively. Observed adverse reactions were as expected, with myelosuppression and fatigue being the most common hematologic and non-hematologic adverse events (AEs), respectively. Longer durations of treatment and response, higher response rates and fewer AEs were noted with the 2 mg pomalidomide dose. This is the longest follow-up data for Pom/dex in refractory multiple myeloma and will help shape the real-world utilization of this regimen.
Collapse
Affiliation(s)
- S Ailawadhi
- Division of Hematology and Medical Oncology, Department of Medicine, Mayo Clinic, Jacksonville, FL, USA
| | - J R Mikhael
- Division of Hematology and Medical Oncology, Department of Medicine, Mayo Clinic, Rochester, MN, USA
| | - B R LaPlant
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA
| | - K M Laumann
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA
| | - S Kumar
- Division of Hematology and Medical Oncology, Department of Medicine, Mayo Clinic, Phoenix, AZ, USA
| | - V Roy
- Division of Hematology and Medical Oncology, Department of Medicine, Mayo Clinic, Jacksonville, FL, USA
| | - D Dingli
- Division of Hematology and Medical Oncology, Department of Medicine, Mayo Clinic, Phoenix, AZ, USA
| | - P L Bergsagel
- Division of Hematology and Medical Oncology, Department of Medicine, Mayo Clinic, Rochester, MN, USA
| | - F K Buadi
- Division of Hematology and Medical Oncology, Department of Medicine, Mayo Clinic, Phoenix, AZ, USA
| | - S V Rajkumar
- Division of Hematology and Medical Oncology, Department of Medicine, Mayo Clinic, Phoenix, AZ, USA
| | - R Fonseca
- Division of Hematology and Medical Oncology, Department of Medicine, Mayo Clinic, Rochester, MN, USA
| | - M A Gertz
- Division of Hematology and Medical Oncology, Department of Medicine, Mayo Clinic, Phoenix, AZ, USA
| | - P Kapoor
- Division of Hematology and Medical Oncology, Department of Medicine, Mayo Clinic, Phoenix, AZ, USA
| | - T Sher
- Division of Hematology and Medical Oncology, Department of Medicine, Mayo Clinic, Jacksonville, FL, USA
| | - S R Hayman
- Division of Hematology and Medical Oncology, Department of Medicine, Mayo Clinic, Phoenix, AZ, USA
| | - A K Stewart
- Division of Hematology and Medical Oncology, Department of Medicine, Mayo Clinic, Rochester, MN, USA
| | - A Dispenzieri
- Division of Hematology and Medical Oncology, Department of Medicine, Mayo Clinic, Phoenix, AZ, USA
| | - R A Kyle
- Division of Hematology and Medical Oncology, Department of Medicine, Mayo Clinic, Phoenix, AZ, USA
| | - W I Gonsalves
- Division of Hematology and Medical Oncology, Department of Medicine, Mayo Clinic, Phoenix, AZ, USA
| | - C B Reeder
- Division of Hematology and Medical Oncology, Department of Medicine, Mayo Clinic, Rochester, MN, USA
| | - Y Lin
- Division of Hematology and Medical Oncology, Department of Medicine, Mayo Clinic, Phoenix, AZ, USA
| | - R S Go
- Division of Hematology and Medical Oncology, Department of Medicine, Mayo Clinic, Phoenix, AZ, USA
| | - N Leung
- Division of Hematology and Medical Oncology, Department of Medicine, Mayo Clinic, Phoenix, AZ, USA
| | - T Kourelis
- Division of Hematology and Medical Oncology, Department of Medicine, Mayo Clinic, Phoenix, AZ, USA
| | - J A Lust
- Division of Hematology and Medical Oncology, Department of Medicine, Mayo Clinic, Phoenix, AZ, USA
| | - S J Russell
- Division of Hematology and Medical Oncology, Department of Medicine, Mayo Clinic, Rochester, MN, USA
| | - A A Chanan-Khan
- Division of Hematology and Medical Oncology, Department of Medicine, Mayo Clinic, Jacksonville, FL, USA
| | - M Q Lacy
- Division of Hematology and Medical Oncology, Department of Medicine, Mayo Clinic, Phoenix, AZ, USA
| |
Collapse
|
6
|
Fougeyrollas R, Křivánek J, Roy V, Dolejšová K, Frechault S, Roisin Y, Hanus R, Sillam-Dussès D. Asexual queen succession mediates an accelerated colony life cycle in the termite Silvestritermes minutus. Mol Ecol 2017; 26:3295-3308. [PMID: 28281327 DOI: 10.1111/mec.14095] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [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: 11/24/2016] [Revised: 02/16/2017] [Accepted: 02/28/2017] [Indexed: 11/28/2022]
Abstract
Mixed modes of reproduction, combining sexual processes with thelytokous parthenogenesis, occur in all major clades of social insects. In several species of termites, queens maximize their genetic input into nondispersing replacement queens through parthenogenesis, while maintaining genetically diverse sterile offspring and dispersing reproductives via sexual reproduction. This so-called asexual queen succession (AQS) has multiple independent origins and its presumed advantages are diverse as well, ranging from multiplication of colony reproductive potential to extension of its lifespan beyond that of the foundress. However, how AQS shapes colony life cycles under natural conditions remains poorly known. The neotropical termite Silvestritermes minutus inhabits small but conspicuous nests, offering a unique opportunity to investigate the impact of AQS on life history. We report on its breeding system, life cycle and sex allocation using social structure census in 137 nests and genotyping of 12 colonies at 12 microsatellite loci. We show that colonies are established by an outbred pair of primary reproductives. In less than 2 years, the foundress is replaced by multiple neotenic queens, arising mostly through automixis with central fusion. Sterile castes, male and most (93%) female dispersers are produced sexually. Colony reproduction is usually restricted to a single dispersal of alates with unbiased sex ratio, taking place after 3 years. We conclude that S. minutus benefits from AQS to maximize colony growth rate and alate production within a very short life cycle rather than to extend colony lifespan. This highlights the versatile role of AQS in different cases of its polyphyletic origin.
Collapse
Affiliation(s)
- R Fougeyrollas
- Université Paris-Est Créteil, Université Pierre et Marie Curie, CNRS, INRA, IRD, Université Paris-Diderot, iEES-Paris, 61 avenue du Général de Gaulle, 94010, Créteil, France
| | - J Křivánek
- Chemistry of Social Insects, The Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo n. 2, 166 10, Prague, Czech Republic.,Faculty of Science, Charles University in Prague, Albertov 6, 128 43, Prague, Czech Republic
| | - V Roy
- Université Paris-Est Créteil, Université Pierre et Marie Curie, CNRS, INRA, IRD, Université Paris-Diderot, iEES-Paris, 61 avenue du Général de Gaulle, 94010, Créteil, France
| | - K Dolejšová
- Chemistry of Social Insects, The Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo n. 2, 166 10, Prague, Czech Republic.,Faculty of Science, Charles University in Prague, Albertov 6, 128 43, Prague, Czech Republic
| | - S Frechault
- Université Paris-Est Créteil, Université Pierre et Marie Curie, CNRS, INRA, IRD, Université Paris-Diderot, iEES-Paris, 61 avenue du Général de Gaulle, 94010, Créteil, France
| | - Y Roisin
- Evolutionary Biology and Ecology, Université Libre de Bruxelles, Av. F. D. Roosevelt 50, 1050, Brussels, Belgium
| | - R Hanus
- Chemistry of Social Insects, The Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo n. 2, 166 10, Prague, Czech Republic
| | - D Sillam-Dussès
- IRD-Sorbonne Universités-UMR 242, Université Pierre et Marie Curie, Université Paris-Est Créteil, Université Paris-Diderot, CNRS, INRA, iEES-Paris, 32 avenue Henri Varagnat, 93143, Bondy, France.,LEEC, EA4443, Université Paris 13-Sorbonne Paris Cité, 99 Avenue J. B. Clément, 93430, Villetaneuse, France
| |
Collapse
|
7
|
Chevrier F, Chamas Z, Lequeux T, Pfund E, Andrei G, Snoeck R, Roy V, Agrofoglio LA. Synthesis of 5,5-difluoro-5-phosphono-pent-2-en-1-yl nucleosides as potential antiviral agents. RSC Adv 2017. [DOI: 10.1039/c7ra05153k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A series of hitherto unknown acyclic 5,5-difluoro-5-phosphono-pent-2-en-1-yl-pyrimidines, -purines and -(1,2,4)-triazolo-3-carboxamide were successfully synthesized from (E)-1-bromo-5-diethoxyphosphoryl-5,5-difluoro-pent-2-ene in a stereoselective manner.
Collapse
Affiliation(s)
- F. Chevrier
- Université d'Orléans et CNRS
- ICOA
- UMR 7311
- Orléans
- France
| | - Z. Chamas
- Université d'Orléans et CNRS
- ICOA
- UMR 7311
- Orléans
- France
| | - T. Lequeux
- Laboratoire de Chimie Moléculaire et Thio-organique
- ENSICAEN
- UNICAEN
- UMR
- CNRS 6507
| | - E. Pfund
- Laboratoire de Chimie Moléculaire et Thio-organique
- ENSICAEN
- UNICAEN
- UMR
- CNRS 6507
| | - G. Andrei
- REGA Institute for Medical Research
- KU Leuven
- Leuven
- Belgium
| | - R. Snoeck
- REGA Institute for Medical Research
- KU Leuven
- Leuven
- Belgium
| | - V. Roy
- Université d'Orléans et CNRS
- ICOA
- UMR 7311
- Orléans
- France
| | | |
Collapse
|
8
|
Paulus A, Akhtar S, Caulfield TR, Samuel K, Yousaf H, Bashir Y, Paulus SM, Tran D, Hudec R, Cogen D, Jiang J, Edenfield B, Novak A, Ansell SM, Witzig T, Martin P, Coleman M, Roy V, Ailawadhi S, Chitta K, Linder S, Chanan-Khan A. Coinhibition of the deubiquitinating enzymes, USP14 and UCHL5, with VLX1570 is lethal to ibrutinib- or bortezomib-resistant Waldenstrom macroglobulinemia tumor cells. Blood Cancer J 2016; 6:e492. [PMID: 27813535 PMCID: PMC5148058 DOI: 10.1038/bcj.2016.93] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Revised: 07/21/2016] [Accepted: 08/22/2016] [Indexed: 01/30/2023] Open
Abstract
The survival of Waldenstrom macroglobulinemia (WM) tumor cells hinges on aberrant B-cell receptor (BCR) and MYD88 signaling. WM cells upregulate the proteasome function to sustain the BCR-driven growth while maintaining homeostasis. Clinically, two treatment strategies are used to disrupt these complementary yet mutually exclusive WM survival pathways via ibrutinib (targets BTK/MYD88 node) and bortezomib (targets 20 S proteasome). Despite the success of both agents, WM patients eventually become refractory to treatment, highlighting the adaptive plasticity of WM cells and underscoring the need for development of new therapeutics. Here we provide a comprehensive preclinical report on the anti-WM activity of VLX1570, a novel small-molecule inhibitor of the deubiquitinating enzymes (DUBs), ubiquitin-specific protease 14 (USP14) and ubiquitin carboxyl-terminal hydrolase isozyme L5 (UCHL5). Both DUBs reside in the 19 S proteasome cap and their inhibition by VLX1570 results in rapid and tumor-specific apoptosis in bortezomib- or ibrutinib-resistant WM cells. Notably, treatment of WM cells with VLX1570 downregulated BCR-associated elements BTK, MYD88, NFATC, NF-κB and CXCR4, the latter whose dysregulated function is linked to ibrutinib resistance. VLX1570 administered to WM-xenografted mice resulted in decreased tumor burden and prolonged survival (P=0.0008) compared with vehicle-treated mice. Overall, our report demonstrates significant value in targeting USP14/UCHL5 with VLX1570 in drug-resistant WM and carries a high potential for clinical translation.
Collapse
Affiliation(s)
- A Paulus
- Department of Cancer Biology, Mayo Clinic, Jacksonville, FL, USA.,Division of Hematology and Oncology, Mayo Clinic, Jacksonville, FL, USA
| | - S Akhtar
- Department of Cancer Biology, Mayo Clinic, Jacksonville, FL, USA
| | - T R Caulfield
- Department of Molecular Neuroscience, Mayo Clinic, Jacksonville, FL, USA
| | - K Samuel
- Department of Cancer Biology, Mayo Clinic, Jacksonville, FL, USA
| | - H Yousaf
- Department of Cancer Biology, Mayo Clinic, Jacksonville, FL, USA
| | - Y Bashir
- Department of Cancer Biology, Mayo Clinic, Jacksonville, FL, USA
| | - S M Paulus
- Department of Cancer Biology, Mayo Clinic, Jacksonville, FL, USA
| | - D Tran
- Department of Cancer Biology, Mayo Clinic, Jacksonville, FL, USA
| | - R Hudec
- Department of Molecular Neuroscience, Mayo Clinic, Jacksonville, FL, USA
| | - D Cogen
- Department of Cancer Biology, Mayo Clinic, Jacksonville, FL, USA
| | - J Jiang
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Jacksonville, FL, USA
| | - B Edenfield
- Department of Cancer Biology, Mayo Clinic, Jacksonville, FL, USA
| | - A Novak
- Department of Hematology and Internal Medicine, Mayo Clinic, Rochester, MN, USA
| | - S M Ansell
- Department of Hematology and Internal Medicine, Mayo Clinic, Rochester, MN, USA
| | - T Witzig
- Department of Hematology and Internal Medicine, Mayo Clinic, Rochester, MN, USA
| | - P Martin
- Department of Medicine, Weill Cornell Medical College, Cornell, NY, USA
| | - M Coleman
- Department of Medicine, Weill Cornell Medical College, Cornell, NY, USA
| | - V Roy
- Division of Hematology and Oncology, Mayo Clinic, Jacksonville, FL, USA
| | - S Ailawadhi
- Division of Hematology and Oncology, Mayo Clinic, Jacksonville, FL, USA
| | - K Chitta
- Department of Cancer Biology, Mayo Clinic, Jacksonville, FL, USA
| | - S Linder
- Institute for Oncology-Pathology, Cancer Center Karolinska, Karolinska Institute, Stockholm, Sweden
| | - A Chanan-Khan
- Department of Cancer Biology, Mayo Clinic, Jacksonville, FL, USA.,Division of Hematology and Oncology, Mayo Clinic, Jacksonville, FL, USA
| |
Collapse
|
9
|
Roy V, Sood N, Foran J, Zubair A. Impact of Obesity on Hematopoietic Progenitor Cell Mobilization and Collection in Healthy Volunteer Donors. Cytotherapy 2016. [DOI: 10.1016/j.jcyt.2016.03.091] [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: 10/21/2022]
|
10
|
Dupont L, Porco D, Symondson WOC, Roy V. Hybridization relics complicate barcode-based identification of species in earthworms. Mol Ecol Resour 2016; 16:883-94. [PMID: 26929276 DOI: 10.1111/1755-0998.12517] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [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: 10/16/2015] [Revised: 02/05/2016] [Accepted: 02/05/2016] [Indexed: 11/28/2022]
Abstract
Introgressive hybridization results in mito-nuclear discordance which could obscure the delimitation of closely related taxa. Although such events are increasingly reported, they have been poorly studied in earthworms. Here, we propose a method for investigating the degree of introgressive hybridization between three taxa of the Allolobophora chlorotica aggregate within two field populations (N = 67 and N = 105) using a reference data set including published DNA barcoding and microsatellite data of all known A. chlorotica lineages (N = 85). For this, we used both molecular phylogenetic and population genetic approaches. The test of correspondence between mitochondrial cytochrome c oxidase I (COI) lineages and clusters of nuclear microsatellite genotypes allowed individuals to be sorted in three categories (matching, admixed and nonmatching) and additional markers (mitochondrial NADH dehydrogenase subunit 1, nuclear Histone 3 and Internal transcribed Spacer Region 2) were used for phylogenetic reconstructions in order to check assignments. Although 15 admixed individuals were observed, no early-generation hybrids were detected within the two populations. Interestingly, 14 nonmatching individuals (i.e. with a mtDNA haplotype that did not correspond to their nuclear cluster) were detected, a pattern that would result after multiple generations of unidirectional hybridization of female from one taxon to male of the other taxon. Because earthworms are simultaneous hermaphrodites, these events of unidirectional hybridization suggest sterility of the male function in several crosses and highlight that some individuals can be misidentified if reliance is placed on COI barcodes alone. These findings could improve the use of these barcodes in earthworms for species delineation.
Collapse
Affiliation(s)
- L Dupont
- Institut d'écologie et des sciences de l'environnement de Paris, Université Paris Est Créteil, 61 avenue du Général de Gaulle, 94010, Créteil Cedex, France
| | - D Porco
- Bâtiment IRESE A, Université de Rouen - Laboratoire ECODIV, Place Emile Blondel, 76821, Mont Saint Aignan Cedex, France
| | - W O C Symondson
- Cardiff School of Biosciences, Cardiff University, Museum Avenue, Cardiff, CF10 3AX, UK
| | - V Roy
- Institut d'écologie et des sciences de l'environnement de Paris, Université Paris Est Créteil, 61 avenue du Général de Gaulle, 94010, Créteil Cedex, France
| |
Collapse
|
11
|
Arya A, Roy V, Lomash A, Kapoor S, Khanna A, Rangari G. Rifampicin pharmacokinetics in children under the Revised National Tuberculosis Control Programme, India, 2009. Int J Tuberc Lung Dis 2015; 19:440-5. [PMID: 25860000 DOI: 10.5588/ijtld.13.0819] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVE To evaluate serum levels of rifampicin (RMP) in children with tuberculosis (TB) at doses administered according to India's Revised National Tuberculosis Control Programme (RNTCP) 2009 report. METHOD Prospective, open label, non-randomised single-dose study in 20 children aged 5-12 years. SETTING The out-patient chest clinic of a tertiary care hospital, New Delhi, India. RESULTS The median RMP dose administered was 9.56 mg/kg (range 9-12.64). Peak RMP concentration (Cmax) attained was 6.24 μg/ml (range 5.44-7.61) at time to Cmax of 3.5 h (range 3-4). RMP levels were significantly lower at 2, 3 and 4 h in children administered <10 mg/kg than those who received ⩾10 mg/kg (P < 0.05). A positive correlation between the RMP dose administered and Cmax was observed (r(2) = 0.748). RMP Cmax was <8 μg/ml in all patients, a level considered too low for therapeutic efficacy. CONCLUSIONS Low serum concentrations of RMP were attained in children under the RNTCP 2009 weight band system. Peak RMP levels appear to be lower and the single dose elimination half-life shorter in children than in adults. To optimise treatment outcomes, revisions in RMP dose in children should take into consideration age-related differences in pharmacokinetics.
Collapse
Affiliation(s)
- A Arya
- Department of Pharmacology, Maulana Azad Medical College, Lok Nayak Hospital, New Delhi, India
| | - V Roy
- Department of Pharmacology, Maulana Azad Medical College, Lok Nayak Hospital, New Delhi, India
| | - A Lomash
- Department of Paediatrics, Maulana Azad Medical College, Lok Nayak Hospital, New Delhi, India
| | - S Kapoor
- Department of Paediatrics, Maulana Azad Medical College, Lok Nayak Hospital, New Delhi, India
| | - A Khanna
- Chest Clinic, Maulana Azad Medical College, Lok Nayak Hospital, New Delhi, India
| | - G Rangari
- Department of Pharmacology, Maulana Azad Medical College, Lok Nayak Hospital, New Delhi, India
| |
Collapse
|
12
|
Rangari G, Roy V, Sethi G, Mishra T, Khanna A. Blood levels of isoniazid in Indian children with tuberculosis. ACTA ACUST UNITED AC 2015; 62:80-5. [DOI: 10.1016/j.ijtb.2015.04.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Accepted: 04/07/2015] [Indexed: 11/29/2022]
|
13
|
Lorivel T, Roy V, Hilber P. Fear-related behaviors in Lurcher mutant mice exposed to a predator. Genes, Brain and Behavior 2014; 13:794-801. [DOI: 10.1111/gbb.12173] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Revised: 08/22/2014] [Accepted: 08/22/2014] [Indexed: 11/28/2022]
Affiliation(s)
- T. Lorivel
- Laboratoire de Psychologie et Neurosciences de la Cognition et de l'Affectivité, EA4700, Université de Rouen, LARC Neurosciences Network, Mont-Saint-Aignan Cedex
- Institut de Pharmacologie Moléculaire et Cellulaire IPMC, UMR7275 CNRS, Université de Nice - Sophia-Antipolis, Equipe “Développement de stratégies thérapeutiques innovantes pour le traitement de la dépression et de l'AVC”, Valbonne
- Centre d'Etudes des Transformations des Activités Physiques et Sportives, EA 3832; Université de Rouen; Mont-Saint-Aignan Cedex France
| | - V. Roy
- Laboratoire de Psychologie et Neurosciences de la Cognition et de l'Affectivité, EA4700, Université de Rouen, LARC Neurosciences Network, Mont-Saint-Aignan Cedex
| | - P. Hilber
- Laboratoire de Psychologie et Neurosciences de la Cognition et de l'Affectivité, EA4700, Université de Rouen, LARC Neurosciences Network, Mont-Saint-Aignan Cedex
| |
Collapse
|
14
|
Casarrubea M, Magnusson MS, Roy V, Arabo A, Sorbera F, Santangelo A, Faulisi F, Crescimanno G. Multivariate temporal pattern analysis applied to the study of rat behavior in the elevated plus maze: methodological and conceptual highlights. J Neurosci Methods 2014; 234:116-26. [PMID: 24932963 DOI: 10.1016/j.jneumeth.2014.06.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [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: 11/15/2013] [Revised: 06/06/2014] [Accepted: 06/09/2014] [Indexed: 11/29/2022]
Abstract
Aim of this article is to illustrate the application of a multivariate approach known as t-pattern analysis in the study of rat behavior in elevated plus maze. By means of this multivariate approach, significant relationships among behavioral events in the course of time can be described. Both quantitative and t-pattern analyses were utilized to analyze data obtained from fifteen male Wistar rats following a trial 1-trial 2 protocol. In trial 2, in comparison with the initial exposure, mean occurrences of behavioral elements performed in protected zones of the maze showed a significant increase counterbalanced by a significant decrease of mean occurrences of behavioral elements in unprotected zones. Multivariate t-pattern analysis, in trial 1, revealed the presence of 134 t-patterns of different composition. In trial 2, the temporal structure of behavior become more simple, being present only 32 different t-patterns. Behavioral strings and stripes (i.e. graphical representation of each t-pattern onset) of all t-patterns were presented both for trial 1 and trial 2 as well. Finally, percent distributions in the three zones of the maze show a clear-cut increase of t-patterns in closed arm and a significant reduction in the remaining zones. Results show that previous experience deeply modifies the temporal structure of rat behavior in the elevated plus maze. In addition, this article, by highlighting several conceptual, methodological and illustrative aspects on the utilization of t-pattern analysis, could represent a useful background to employ such a refined approach in the study of rat behavior in elevated plus maze.
Collapse
Affiliation(s)
- M Casarrubea
- Department of Experimental Biomedicine and Clinical Neurosciences (BioNeC), Human Physiology Section "Giuseppe Pagano", Laboratory of Behavioral Physiology, University of Palermo, Palermo, Italy.
| | - M S Magnusson
- Human Behavior Laboratory, University of Iceland, Reykjavik, Iceland.
| | - V Roy
- PSY-NCA, EA4700, Laboratoire de Psychologie et de Neurosciences de la Cognition et de l'Affectivité, Université de Rouen, Mont-Saint-Aignan, France.
| | - A Arabo
- PSY-NCA, EA4700, Laboratoire de Psychologie et de Neurosciences de la Cognition et de l'Affectivité, Université de Rouen, Mont-Saint-Aignan, France.
| | - F Sorbera
- Department of Experimental Biomedicine and Clinical Neurosciences (BioNeC), Human Physiology Section "Giuseppe Pagano", Laboratory of Behavioral Physiology, University of Palermo, Palermo, Italy.
| | - A Santangelo
- Department of Experimental Biomedicine and Clinical Neurosciences (BioNeC), Human Physiology Section "Giuseppe Pagano", Laboratory of Behavioral Physiology, University of Palermo, Palermo, Italy.
| | - F Faulisi
- Department of Experimental Biomedicine and Clinical Neurosciences (BioNeC), Human Physiology Section "Giuseppe Pagano", Laboratory of Behavioral Physiology, University of Palermo, Palermo, Italy.
| | - G Crescimanno
- Department of Experimental Biomedicine and Clinical Neurosciences (BioNeC), Human Physiology Section "Giuseppe Pagano", Laboratory of Behavioral Physiology, University of Palermo, Palermo, Italy.
| |
Collapse
|
15
|
Dubois M, Lapinte N, Villier V, Lecointre C, Roy V, Tonon MC, Gandolfo P, Joly F, Hilber P, Castel H. Chemotherapy-induced long-term alteration of executive functions and hippocampal cell proliferation: Role of glucose as adjuvant. Neuropharmacology 2014; 79:234-48. [DOI: 10.1016/j.neuropharm.2013.11.012] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2013] [Revised: 11/18/2013] [Accepted: 11/19/2013] [Indexed: 11/28/2022]
|
16
|
Casarrubea M, Roy V, Sorbera F, Magnusson M, Santangelo A, Arabo A, Crescimanno G. Significant divergences between the temporal structure of the behavior in Wistar and in the spontaneously more anxious DA/Han strain of rats tested in elevated plus maze. Behav Brain Res 2013; 250:166-73. [DOI: 10.1016/j.bbr.2013.05.016] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Revised: 05/07/2013] [Accepted: 05/07/2013] [Indexed: 11/26/2022]
|
17
|
Witzig TE, Laumann KM, Lacy MQ, Hayman SR, Dispenzieri A, Kumar S, Reeder CB, Roy V, Lust JA, Gertz MA, Greipp PR, Hassoun H, Mandrekar SJ, Rajkumar SV. A phase III randomized trial of thalidomide plus zoledronic acid versus zoledronic acid alone in patients with asymptomatic multiple myeloma. Leukemia 2012; 27:220-5. [PMID: 22902362 DOI: 10.1038/leu.2012.236] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Patients with asymptomatic (smoldering) multiple myeloma (AMM) have a high risk of transformation to active multiple myeloma (MM). Bisphosphonates such as zoledronic acid (ZLD) reduce skeletal events in MM and the immunomodulatory agent thalidomide (Thal) has proven effectiveness in active MM. We hypothesized that treatment with Thal and ZLD would prolong the time to progression (TTP) to MM over ZLD alone. Eligible patients had asymptomatic MM and all patients received ZLD 4 mg intravenous monthly; the treatment arm also received Thal 200 mg per day. The TTP was superior for Thal/ZLD (n=35) patients compared with ZLD alone (n=33); median TTP of 2.4 years (95% confidence interval (CI): 1.4-3.6) versus 1.2 years (95% CI: 0.7-2.5) (hazard ratio (HR), 2.05; 95% CI: 1.1-3.8; P-value: 0.02). At 1 year, 86% of Thal/ZLD patients were progression free compared with 55% on ZLD alone (P=0.0048). The overall response rate after year 1 was 37% for Thal/ZLD with a median duration of response of 3.3 years (95% CI: 1.1-NA); there were no confirmed responses to ZLD alone (P=0.0004). The addition of Thal to standard ZLD produces anti-tumor responses whereas ZLD alone does not. Thal/ZLD also prolongs TTP from AMM to MM. This study provides the rationale for further studies in patients with AMM to delay chemotherapy.
Collapse
Affiliation(s)
- T E Witzig
- Division of Hematology, Department of Medicine, Mayo Clinic College of Medicine and Mayo Foundation, Rochester, MN, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
18
|
Roy V, Jabot J, Bouchet B, Delambre JF, Vandroux D. Réalisation d’une évacuation sanitaire sous ECLS par l’UMAC du CHR Félix Guyon de l’Île de La Réunion sur plus de 10 000km en avion et bateau. ACTA ACUST UNITED AC 2012; 31:495-6. [DOI: 10.1016/j.annfar.2012.02.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2011] [Accepted: 02/23/2012] [Indexed: 10/28/2022]
|
19
|
Dubois M, Lejoncour V, Lapinte N, Roy V, Tonon M, Gandolfo P, Joly F, Hilber P, Castel H. 1167 POSTER Comparison of the Impact of the Targeted Therapy Everolimus (Afinitor®) and the Chemotherapy 5-FU on Cognitive Functions and Cerebral Plasticity in an Animal Model. Eur J Cancer 2011. [DOI: 10.1016/s0959-8049(11)70810-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
20
|
Dubois M, Lapinte N, Le Joncour V, Roy V, Tonon M, Gandolfo P, Joly F, Hilber P, Castel H. Evaluation of the targeted therapy everolimus on cognitive functions and cerebral plasticity in an animal model. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e13589] [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: 11/20/2022] Open
|
21
|
Mikhael J, Rajkumar V, Roy V, Hayman SR, Fonseca R, Detweiler Short K, LaPlant B, Laumann KM, Dispenzieri A, Lacy M. Efficacy of pomalidomide plus low-dose dexamethasone in multiple myeloma patients despite previous use of lenalidomide. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.8067] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
22
|
Short KD, Rajkumar SV, Larson D, Buadi F, Hayman S, Dispenzieri A, Gertz M, Kumar S, Mikhael J, Roy V, Kyle RA, Lacy MQ. Incidence of extramedullary disease in patients with multiple myeloma in the era of novel therapy, and the activity of pomalidomide on extramedullary myeloma. Leukemia 2011; 25:906-8. [PMID: 21350560 DOI: 10.1038/leu.2011.29] [Citation(s) in RCA: 131] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
We studied 174 consecutive patients with relapsed refractory multiple myeloma (MM) enrolled on a phase II clinical trial of pomalidomide plus low-dose dexamethasone at Mayo Clinic. Extramedullary disease (EMD) was present at the time of trial entry in 7.5% (13 of 174 patients). The rate of EMD in the first 3 years following diagnosis of MM was 3%. The response of EMD to pomalidomide plus low-dose dexamethasone included two complete and two partial responses among the 13 patients (response rate, 31%). Overall survival measured from trial entry was significantly shorter for patients with treatment-emergent EMD compared with those who did not have EMD, (median 16 months versus not reached, P=0.002).
Collapse
Affiliation(s)
- K Detweiler Short
- Division of Hematology, Department of Internal Medicine, Mayo Clinic, Rochester, MN 55905, USA
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Jiang L, Malik S, Litzow M, Gastineau D, Micallef I, Roy V, Solberg L, Zubair A. CD34+ Cells From Poor Mobilizers Are Qualitatively Equivalent to CD34+ Cells From Good Mobilizers. Biol Blood Marrow Transplant 2011. [DOI: 10.1016/j.bbmt.2010.12.158] [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: 11/29/2022]
|
24
|
Vishnu P, Roy V, Paulsen A, Zubair A. Efficacy and Cost-Benefit Analysis of Plerixafor Plus Filgrastim Based on a Risk Adaptive Approach for Autologous Peripheral Blood Hematopoietic Progenitor Cell Collection. Biol Blood Marrow Transplant 2011. [DOI: 10.1016/j.bbmt.2010.12.142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
25
|
Roy V, Sahni P, Gupta P, Sethi GR, Khanna A. Blood levels of pyrazinamide in children at doses administered under the Revised National Tuberculosis Control Program. Indian Pediatr 2011; 49:721-5. [PMID: 22317983 DOI: 10.1007/s13312-012-0164-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [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: 07/01/2011] [Accepted: 10/31/2011] [Indexed: 11/27/2022]
Abstract
OBJECTIVES To evaluate the blood levels, pharma-cokinetics and pharmacodynamic indices of pyrazinamide (PZA) in children suffering from tuberculosis, at doses administered under the weight band system of Revised National Tuberculosis Control Program of India (RNTCP) of India. DESIGN Prospective, open-label, non-randomized single-dose study. SETTING 20 children in the age group 5-12 years attending out-patient tuberculosis clinic of a tertiary hospital. OUTCOME MEASURES Blood levels of pyrazinamide after single dose administration, as per the weight band system of RNTCP. RESULTS Group I (n=7) included children who received pyrazinamide within the recommended 30-35 mg/kg dose (mean 31.9 ± 0.8 mg/kg) and Group II (n=13) included those who received a dose lower than 30 -35 mg/kg (mean 28.1 ± 0.3 mg/kg). The Cmax (95% CI of difference 2.2, 13.2; P=0.008) and AUC (95% CI of difference 28.6, 208.1; P=0.01) were significantly lower in Group II. The duration of time for which the concentration was maintained above 25 ug ml-1 was 4-8 h in Group I and 3-5.5 h in Group II (95% CI of difference 0.1, 2.0; P=0.03). The half life, elimination rate constant, clearance and volume of distribution were comparable in the two groups. The ratios of Cmax and AUC to MIC (25 ug ml-1) in children were lower than that recommended for PZA in adults. CONCLUSIONS Lower blood concentrations are being attained in children receiving PZA doses under the existing weight band system of RNTCP of India. The weight bands may need to be revised and dose recommendations be based on pharmacokinetic and efficacy data in children.
Collapse
Affiliation(s)
- V Roy
- Department of Pharmacology, Maulana Azad Medical College and Associated Hospitals, Bahadurshah Zafar Marg, New Delhi 110 002, India.
| | | | | | | | | |
Collapse
|
26
|
Kapoor P, Rajkumar SV, Dispenzieri A, Gertz MA, Lacy MQ, Dingli D, Mikhael JR, Roy V, Kyle RA, Greipp PR, Kumar S, Mandrekar SJ. Melphalan and prednisone versus melphalan, prednisone and thalidomide for elderly and/or transplant ineligible patients with multiple myeloma: a meta-analysis. Leukemia 2011; 25:689-96. [PMID: 21233832 DOI: 10.1038/leu.2010.313] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Trials comparing efficacy of melphalan prednisone (MP) with MP plus thalidomide in transplant ineligible, elderly patients with multiple myeloma have provided conflicting evidence. Although there is agreement regarding improved response rates (RRs) and higher toxicity with the addition of thalidomide to MP, the impact on progression free survival (PFS) and overall survival (OS) is less clear. We performed a meta-analysis comparing efficacy of melphalan, prednisone and thalidomide (MPT) and MP by pooling results on RR, PFS and OS reported in all the identified randomized controlled trials (RCTs) under a random effects model. Overall, six prospective RCTs, with data extractable from five published trials (n=1571) [corrected] were identified. The pooled odds ratio of responding to therapy with MPT vs MP was 3.39 (P<0.001, 95% CI: 2.24-5.12). The pooled hazard ratios for PFS and OS were and 0.68 (P<0.001; 95% CI: 0.55-0.82) and 0.80 (P=0.07; 95% CI: 0.63-1.02), respectively, in favor of MPT. The odds ratios for high grade peripheral neuropathy and deep venous thrombosis were 6.6 and 2.4, respectively, in favour of MP. There was significant heterogeneity among the RCTs. Our meta-analysis demonstrates that in previously untreated, transplant ineligible, elderly myeloma patients, the addition of T to MP results in significantly improved RR and PFS with a trend towards improvement in OS compared with MP alone, but at a cost of significantly greater toxicity.
Collapse
Affiliation(s)
- P Kapoor
- Division of Hematology, Mayo Clinic, Rochester, MN 55905, USA
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Roy V, Saxena D, Agarwal M, Bahadur AK, Mishra B. Use of antimicrobial agents and granulocyte colony stimulating factors for febrile neutropenia in cancer patients in a tertiary care hospital in India. Indian J Cancer 2010; 47:430-6. [PMID: 21131758 DOI: 10.4103/0019-509x.73568] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND Use of antimicrobials (AM) and granulocyte colony stimulating factors (G-CSF) affect the outcome and cost of treatment of febrile neutropenia (FN). There are no studies describing the AM utilization pattern or the use of G-CSF and cost incurred on them in cancer patients with FN from India. MATERIALS AND METHODS A study was conducted in a tertiary care, teaching hospital in New Delhi, India, with the objectives of describing the utilization pattern of AM and G-CSF in cancer patients with FN. The efficacy and costs of AM and G-CSF prescribed were also assessed. RESULTS A total of 211 patients with FN were enrolled in the study. A majority of 207 (98.1%) were in the low-risk category. The average number of AM used per patient was 2.45 ± 0.02 and the AM exposure density was 1.19. All patients were administered five different combinations of AM regimens and G-CSF, irrespective of the risk category. No difference in the time to defervesence or in the recovery of ANC counts were observed with the different AM regimens. The average drug cost per febrile neutropenia episode (FNE) was Rs 4694.45 ± 296.35 (113.95 ± 7.19$). G-CSF accounted for 76.14 - 97.58% of the total costs. CONCLUSION Large variations in the pattern of AM prescribed with routine use of G-CSF, irrespective of the risk status, was observed. Guidelines for the rational and cost-effective use of AM and G-CSF in patients with FN needed to be prepared. This was especially important as treatment was given free of cost to all patients admitted in the government health facility.
Collapse
Affiliation(s)
- V Roy
- Department of Pharmacology, Maulana Azad Medical College, New Delhi, India.
| | | | | | | | | |
Collapse
|
28
|
Lacy MQ, Hayman SR, Gertz MA, Short KD, Dispenzieri A, Kumar S, Greipp PR, Lust JA, Russell SJ, Dingli D, Zeldenrust S, Fonseca R, Bergsagel PL, Roy V, Mikhael JR, Stewart AK, Laumann K, Allred JB, Mandrekar SJ, Rajkumar SV, Buadi F. Pomalidomide (CC4047) plus low dose dexamethasone (Pom/dex) is active and well tolerated in lenalidomide refractory multiple myeloma (MM). Leukemia 2010; 24:1934-9. [PMID: 20827286 DOI: 10.1038/leu.2010.190] [Citation(s) in RCA: 164] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Patients with multiple myeloma progressing on current therapies have limited treatment options. Pomalidomide (CC4047), an immunomodulatory drug, has significant activity in relapsed myeloma and previous studies suggest activity in lenalidomide refractory disease. To better define its efficacy in this group, we treated a cohort of lenalidomide refractory patients. Pomalidomide was given orally (2 mg) daily, continuously in 28-day cycles along with dexamethasone (40 mg) given weekly. Responses were assessed by the International Myeloma Working Group Criteria. Thirty-four patients were enrolled. The best response was very good partial response in 3 (9%), partial response (PR) in 8 (23%), best responses (MR) in 5 (15%), stable disease in 12 (35%) and progressive disease in 6 (18%), for an overall response rate of 47%. Of the 14 patients that were considered high risk, 8 (57%) had responses including 4 PR and 4 MR. The median time to response was 2 months and response duration was 9.1 months, respectively. The median overall survival was 13.9 months. Toxicity was primarily hematologic, with grade 3 or 4 toxicity seen in 18 patients (53%) consisting of anemia (12%), thrombocytopenia (9%) and neutropenia (26%). The combination of pomalidomide and dexamethasone (Pom/dex) is highly active and well tolerated in patients with lenalidomide-refractory myeloma.
Collapse
Affiliation(s)
- M Q Lacy
- Division of Hematology, Mayo Clinic College of Medicine, Rochester, MN 55905, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
29
|
Patel TA, Liu H, Hillman DW, Dueck AC, Ingle JN, Roy V, Hobday TJ, Northfelt DW, Perez EA. Clinical characteristics, univariate, and multivariate Cox model analysis of long-term (> 3 years) survivors of stage IV metastatic breast cancer treated on phase II or III North Central Cancer Treatment Group (NCCTG) trials. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.1157] [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: 11/20/2022] Open
|
30
|
Dubois M, Roy V, Villier V, Gandolfo P, Joly F, Hilber P, Castel H. Age-related cognitive function and cerebral plasticity in miceafter chemotherapy: Important role of drug adjuvants. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e11082] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
31
|
Roy V, Gupta D, Gupta P, Sethi GR, Mishra TK. Pharmacokinetics of isoniazid in moderately malnourished children with tuberculosis. Int J Tuberc Lung Dis 2010; 14:374-376. [PMID: 20132632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023] Open
Abstract
Severe malnutrition is known to affect the pharmacokinetics of isoniazid (INH) in children. However, the effect of moderate malnutrition, which may be more prevalent, is not known. INH was administered to 20 children with tuberculosis at a single dose of 5 mg/kg, and serial blood samples were collected. The serum INH concentrations were higher in the undernourished group but the pharmacokinetic parameters were comparable with those in the normal nutrition group. Weight gain was significantly more in the undernourished group after 1 month of treatment. The study suggests that INH pharmacokinetics may not be significantly altered in children with moderate malnutrition.
Collapse
Affiliation(s)
- V Roy
- Department of Pharmacology, Maulana Azad Medical College, New Delhi, India.
| | | | | | | | | |
Collapse
|
32
|
Patel T, Moreno-Aspitia A, Hume C, Saurel C, Roy V, Perez E. A Retrospective Review of Patients with Adenoid Cystic Breast Cancer Treated at Mayo Clinic. Cancer Res 2009. [DOI: 10.1158/0008-5472.sabcs-09-2055] [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: Adenoid cystic carcinoma of the breast is a rare type of breast cancer accounting for approximately 0.1% of all breast cancer and less than 200 cases are reported in the literature. Hence, data for treatment and outcome are limited. This retrospective review reports the Mayo Clinic's experience.Methods: We identified 30 patients between 1971 and 2009 who were diagnosed with adenoid cystic breast cancer at Mayo Clinic Rochester, Arizona or Florida. Median follow-up was 62 months with a range of 1 to 424 months. Data regarding demographics (age, gender, and race), tumor characteristics (size, grade, and margin status), biological features (Estrogen receptor (ER), Progesterone receptor (PR) status, HER2 status) and clinical course (recurrence, secondary treatment) were collected. Disease free survival was calculated using Kaplan Meier estimates.Results: The median age of all patients was 58 (range, 22 – 78 years). All were female. Median tumor size was 1.3 cm (range, 0.6 – 8.5cm). Axillary lymph node sampling (sentinel or complete dissection) was performed in 15 patients. No patient had lymph node positive disease on presentation. The majority of patients had hormone receptor negative disease. Only 3 patients (10%) had weak hormone receptor (1-10%) positivity. No tumors were HER2 positive. Only two patients had high grade disease. Initial surgical data only available in twenty one patients: fifteen (50%) were treated with lumpectomy and adjuvant radiation, and 6 (20%) were treated with mastectomy. There were no local recurrences. Only one patient was treated with adjuvant chemotherapy (with cyclophosphamide, methotrexate and fluorouracil (CMF) followed by tamoxifen) but still suffered a distant recurrence within 5 years. There were a total of five patients that recurred. The 5-year disease free survival (DFS) rate for the entire cohort was 90%, and 10 year DFS was 83%. Median time to recurrence was 47.5 months (Range, 23-77 months). Recurrence occurred almost exclusively in patients with ≥ T2 disease. The primary site of metastases was lung (80%) and bone (20%) but subsequent liver and brain metastases were also seen. Treatments at relapse included surgical resection, radiosurgery and chemotherapy.Conclusion: Adenoid cystic carcinomas of the breast are rare but have overall good prognosis. This review confirms that the majority of these patients present with node negative disease, low to intermediate histologic grade and endocrine unresponsive tumors. Primary treatment is surgery (mastectomy or lumpectomy plus radiation) and there seems to be no role of any adjuvant therapy at the present time. In general, recurrences (80%) occurred with tumors larger than 2 cm and adjuvant chemotherapy and/or targeted therapy could be explored for selected patients in the context of a clinical trial. Overall mortality after recurrence was 50% but median overall survival was variable in years (1-14 years).
Citation Information: Cancer Res 2009;69(24 Suppl):Abstract nr 2055.
Collapse
|
33
|
Sukov WR, Miller DV, Dueck AC, Tenner KS, Jenkins RB, Kaufman PA, Davidson NE, Dakhil SR, Martino S, Roy V, Perez EA. Benefit of adjuvant trastuzumab in breast cancer patients with focal HER2 amplified clones: Data from N9831 Intergroup Adjuvant Trial. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.520] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
520 Background: Targeted therapy using trastuzumab (an anti-HER-2 receptor monoclonal antibody) has significantly improved survival in breast carcinoma patients (pts), but determining which pts will respond to this therapy remains a challenge. We previously reported (Miller DV, ASCO 2004 abstract #568) a subset of pts with breast cancers demonstrating focal HER-2 amplified clones (FHAC) amidst otherwise nonamplified tumor cells by fluorescence in-situ hybridization. These accounted for 21% of the HER-2 amplified but immunohistochemistry (IHC) negative cases and 30% of the HER-2 amplified but IHC equivocal cases. The clinical significance of this phenomenon was unclear at that time. We now report the disease-free survival (DFS) data on 91 FHAC pts with a comparison to the diffusely amplified (DA) cases in this trial group. Methods: Breast tumors were evaluated for HER-2 gene amplification using PathVysion™. FHAC cases demonstrated 2–40% of cells with >10 HER-2 signals and HER-2:CEP17 ratio >5.0, regardless of the overall HER-2:CEP17 ratio. Patient and disease characteristics were compared using chi-square tests. Cox regression models compared DFS between pts randomized to arms A (standard chemotherapy) and C (standard chemotherapy with concurrent trastuzumab) within 91 FHAC and 1571 DA cases. Median follow up was 4.0 years. Results: Age, race, menopausal status, surgical procedure, nodal status, histologic type and grade, and tumor size, were not significantly different between pateints with FHAC and DA. Pateints with FHAC had more frequent hormone receptor positivity compared to DA cases (66% vs 50%; p = 0.004). Hazard ratios between pts with FHAC and DA showed that both groups of pts had similar DFS (A: HR = 0.86, p = 0.65; C: HR = 0.72, p = 0.57). Hazard ratios between arms within FHAC and DA groups demonstrated similar benefit from trastuzumab in each group (FHAC: HR = 0.50, p = 0.30; DA: HR = 0.59, p < 0.0001). Results remained consistent when including hormone receptor status in the model. Conclusions: Based on a small number (n = 91) of pts with FHAC, benefit from trastuzumab appears to be similar whether the population of HER-2 amplified cells with breast carcinomas is focal or diffuse. [Table: see text]
Collapse
Affiliation(s)
- W. R. Sukov
- Mayo Clinic, Rochester, MN; Mayo Clinic Arizona, Scottsdale, AZ; Dartmouth-Hitchcock Medical Center, Lebanon, NH; University of Pittsburgh, Pittsburgh, PA; Cancer Center of Kansas, Wichita, KS; The Angeles Clinic and Research Institute, Santa Monica, CA; Mayo Clinic Jacksonville, Jacskonville, FL
| | - D. V. Miller
- Mayo Clinic, Rochester, MN; Mayo Clinic Arizona, Scottsdale, AZ; Dartmouth-Hitchcock Medical Center, Lebanon, NH; University of Pittsburgh, Pittsburgh, PA; Cancer Center of Kansas, Wichita, KS; The Angeles Clinic and Research Institute, Santa Monica, CA; Mayo Clinic Jacksonville, Jacskonville, FL
| | - A. C. Dueck
- Mayo Clinic, Rochester, MN; Mayo Clinic Arizona, Scottsdale, AZ; Dartmouth-Hitchcock Medical Center, Lebanon, NH; University of Pittsburgh, Pittsburgh, PA; Cancer Center of Kansas, Wichita, KS; The Angeles Clinic and Research Institute, Santa Monica, CA; Mayo Clinic Jacksonville, Jacskonville, FL
| | - K. S. Tenner
- Mayo Clinic, Rochester, MN; Mayo Clinic Arizona, Scottsdale, AZ; Dartmouth-Hitchcock Medical Center, Lebanon, NH; University of Pittsburgh, Pittsburgh, PA; Cancer Center of Kansas, Wichita, KS; The Angeles Clinic and Research Institute, Santa Monica, CA; Mayo Clinic Jacksonville, Jacskonville, FL
| | - R. B. Jenkins
- Mayo Clinic, Rochester, MN; Mayo Clinic Arizona, Scottsdale, AZ; Dartmouth-Hitchcock Medical Center, Lebanon, NH; University of Pittsburgh, Pittsburgh, PA; Cancer Center of Kansas, Wichita, KS; The Angeles Clinic and Research Institute, Santa Monica, CA; Mayo Clinic Jacksonville, Jacskonville, FL
| | - P. A. Kaufman
- Mayo Clinic, Rochester, MN; Mayo Clinic Arizona, Scottsdale, AZ; Dartmouth-Hitchcock Medical Center, Lebanon, NH; University of Pittsburgh, Pittsburgh, PA; Cancer Center of Kansas, Wichita, KS; The Angeles Clinic and Research Institute, Santa Monica, CA; Mayo Clinic Jacksonville, Jacskonville, FL
| | - N. E. Davidson
- Mayo Clinic, Rochester, MN; Mayo Clinic Arizona, Scottsdale, AZ; Dartmouth-Hitchcock Medical Center, Lebanon, NH; University of Pittsburgh, Pittsburgh, PA; Cancer Center of Kansas, Wichita, KS; The Angeles Clinic and Research Institute, Santa Monica, CA; Mayo Clinic Jacksonville, Jacskonville, FL
| | - S. R. Dakhil
- Mayo Clinic, Rochester, MN; Mayo Clinic Arizona, Scottsdale, AZ; Dartmouth-Hitchcock Medical Center, Lebanon, NH; University of Pittsburgh, Pittsburgh, PA; Cancer Center of Kansas, Wichita, KS; The Angeles Clinic and Research Institute, Santa Monica, CA; Mayo Clinic Jacksonville, Jacskonville, FL
| | - S. Martino
- Mayo Clinic, Rochester, MN; Mayo Clinic Arizona, Scottsdale, AZ; Dartmouth-Hitchcock Medical Center, Lebanon, NH; University of Pittsburgh, Pittsburgh, PA; Cancer Center of Kansas, Wichita, KS; The Angeles Clinic and Research Institute, Santa Monica, CA; Mayo Clinic Jacksonville, Jacskonville, FL
| | - V. Roy
- Mayo Clinic, Rochester, MN; Mayo Clinic Arizona, Scottsdale, AZ; Dartmouth-Hitchcock Medical Center, Lebanon, NH; University of Pittsburgh, Pittsburgh, PA; Cancer Center of Kansas, Wichita, KS; The Angeles Clinic and Research Institute, Santa Monica, CA; Mayo Clinic Jacksonville, Jacskonville, FL
| | - E. A. Perez
- Mayo Clinic, Rochester, MN; Mayo Clinic Arizona, Scottsdale, AZ; Dartmouth-Hitchcock Medical Center, Lebanon, NH; University of Pittsburgh, Pittsburgh, PA; Cancer Center of Kansas, Wichita, KS; The Angeles Clinic and Research Institute, Santa Monica, CA; Mayo Clinic Jacksonville, Jacskonville, FL
| |
Collapse
|
34
|
Apsey H, Roy V, Pockaj B, Northfelt D, Sticca R, Nikcevich DA, Mattar B, Fitch T, Perez EA. Surgical practice patterns following NCCTG N0338 “Phase II trial of docetaxel and darboplatin administered every two weeks as induction therapy for stage II and stage III breast cancer.”. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.623] [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: 11/20/2022] Open
Abstract
623 Background: Neoadjuvant therapy plays an important role in breast cancer treatment. Unlike patients who undergo surgery followed by adjuvant therapy,there are no established guidelines for surgical management following neoadjuvant therapy. Methods: Surgical practice patterns from 50 patients in N0338 “Phase II trial of Docetaxel and Carboplatin administered every two weeks as induction therapy for Stage II and Stage III breast cancer” were reviewed. The protocol did not mandate surgical therapy leaving the decision to the treating surgeon and patient. Results: 66% of patients underwent mastectomy (M) and 33% underwent breast conservation therapy (BCT). Three (9%) had immediate reconstruction. Eight (24%) underwent contralateral prophylactic M. Residual tumor size did not always impact primary surgical therapy. In the M group 4 (12%) had no residual disease, 15 (45%) < 2cm and 14 (42%) > 2cm; whereas, in the BCT group 1 (6%) had no residual disease, 12 (70%) < 2cm and 4 (24%) > 2cm. Axillary lymph node (ALN) staging varied tremendously. Three (6%) patients presented with palpable lymphadenopathy and proceeded to complete axillary lymph node dissection (ALND) after chemotherapy (CT). Fine needle aspiration (8) or core needle biopsy (7) of the axilla was performed in 15 (30%) patients before CT; 1 was negative and went on to have sentinel lymph node biopsy (SLNB) after CT; 14 (94%) were positive with 13 (86%) going on to ALND and 1 SLNB after CT. Five (10%) underwent SLNB prior to CT. One (20%) was positive and went on to have ALND after CT; 4 (8%) were negative and had no further ALN staging. A total of 19 (39%) had SLNB after neoadjuvant therapy; 13 (68%) were positive and underwent ALND; 1 SLNB failed; 2 of 5 that were negative underwent ALND with 1 having a positive lymph node. Ten (20%) underwent ALND with no pre-operative staging with 8 being positive for ALN metastases. Conclusions: Review of study data from multiple institutions revealed no consistent criteria in selection of surgical intervention for the breast tumor or ALN staging. There remains a need for further research in this area to establish standard practice guidelines. Support from NIH, sanofi-aventis, Amgen, Breast Cancer Research Foundation. No significant financial relationships to disclose.
Collapse
Affiliation(s)
- H. Apsey
- Mayo Clinic Arizona, Phoenix, AZ; Mayo Clinic Minnesota, Rochester, MN; Mayo Clinic Arizona, Scottsdale, AZ; University of North Dakota, Grand Forks, ND; Duluth Clinic, Duluth, MN; Wichita Community Clinical Oncology Program, Wichita, KS; Mayo Clinic Florida, Jacksonville, FL
| | - V. Roy
- Mayo Clinic Arizona, Phoenix, AZ; Mayo Clinic Minnesota, Rochester, MN; Mayo Clinic Arizona, Scottsdale, AZ; University of North Dakota, Grand Forks, ND; Duluth Clinic, Duluth, MN; Wichita Community Clinical Oncology Program, Wichita, KS; Mayo Clinic Florida, Jacksonville, FL
| | - B. Pockaj
- Mayo Clinic Arizona, Phoenix, AZ; Mayo Clinic Minnesota, Rochester, MN; Mayo Clinic Arizona, Scottsdale, AZ; University of North Dakota, Grand Forks, ND; Duluth Clinic, Duluth, MN; Wichita Community Clinical Oncology Program, Wichita, KS; Mayo Clinic Florida, Jacksonville, FL
| | - D. Northfelt
- Mayo Clinic Arizona, Phoenix, AZ; Mayo Clinic Minnesota, Rochester, MN; Mayo Clinic Arizona, Scottsdale, AZ; University of North Dakota, Grand Forks, ND; Duluth Clinic, Duluth, MN; Wichita Community Clinical Oncology Program, Wichita, KS; Mayo Clinic Florida, Jacksonville, FL
| | - R. Sticca
- Mayo Clinic Arizona, Phoenix, AZ; Mayo Clinic Minnesota, Rochester, MN; Mayo Clinic Arizona, Scottsdale, AZ; University of North Dakota, Grand Forks, ND; Duluth Clinic, Duluth, MN; Wichita Community Clinical Oncology Program, Wichita, KS; Mayo Clinic Florida, Jacksonville, FL
| | - D. A. Nikcevich
- Mayo Clinic Arizona, Phoenix, AZ; Mayo Clinic Minnesota, Rochester, MN; Mayo Clinic Arizona, Scottsdale, AZ; University of North Dakota, Grand Forks, ND; Duluth Clinic, Duluth, MN; Wichita Community Clinical Oncology Program, Wichita, KS; Mayo Clinic Florida, Jacksonville, FL
| | - B. Mattar
- Mayo Clinic Arizona, Phoenix, AZ; Mayo Clinic Minnesota, Rochester, MN; Mayo Clinic Arizona, Scottsdale, AZ; University of North Dakota, Grand Forks, ND; Duluth Clinic, Duluth, MN; Wichita Community Clinical Oncology Program, Wichita, KS; Mayo Clinic Florida, Jacksonville, FL
| | - T. Fitch
- Mayo Clinic Arizona, Phoenix, AZ; Mayo Clinic Minnesota, Rochester, MN; Mayo Clinic Arizona, Scottsdale, AZ; University of North Dakota, Grand Forks, ND; Duluth Clinic, Duluth, MN; Wichita Community Clinical Oncology Program, Wichita, KS; Mayo Clinic Florida, Jacksonville, FL
| | - E. A. Perez
- Mayo Clinic Arizona, Phoenix, AZ; Mayo Clinic Minnesota, Rochester, MN; Mayo Clinic Arizona, Scottsdale, AZ; University of North Dakota, Grand Forks, ND; Duluth Clinic, Duluth, MN; Wichita Community Clinical Oncology Program, Wichita, KS; Mayo Clinic Florida, Jacksonville, FL
| |
Collapse
|
35
|
Pockaj BA, Mukherjee P, Tinder TL, Klosterman CA, Allred JB, Roy V, Perez EA. NCCTG N0338: effect of docetaxel and carboplatin on VEGF, PGE2, and immune cells in patients with stage II or III breast cancer. Cancer Res 2009. [DOI: 10.1158/0008-5472.sabcs-5110] [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
Abstract #5110
Background: It has been demonstrated that certain chemotherapeutic drugs such as taxanes increases cyclooxygenase-2 (COX-2) levels. Upregulation of COX-2 may be a resistance mechanism of the tumor, or a method to modulate toxic effects of the agent. COX-2 is associated with less differentiated and more aggressive breast cancers, and the expression may be a prognostic indicator of disease. Studies defining the “true” impact of therapy on COX-2 activity are lacking. Hypothesis: Chemotherapy increases COX-2 function in patients with invasive breast cancer. This leads to increased PGE2, VEGF, and downregulation of immune responses. Objective: Patients with stage II or III breast cancer were enrolled in a phase II preoperative chemotherapy trial of docetaxel and carboplatin administered every two weeks (4 cycles). We evaluated circulating PGE2, VEGF, and immune cell phenotype at diagnosis and after chemotherapy. Results: Fifty seven patients were enrolled in the study and 32 were analyzed in the lab, most of them being infiltrating ductal carcinoma. Four had complete response, 20 had partial response, and 8 were non-responders. Due to low numbers of patients analyzed, statistical significance was not achieved in most instances. Nevertheless, intriguing data has been generated that warrants further investigation. VEGF/PGE2 versus clinical response to chemotherapy: 86% of the patients in whom VEGF levels decrease post chemotherapy were responders compared to 60% in which VEGF remained unchanged or increased slightly. Responders had decreased VEGF levels on average, while the non-responders increased. Interestingly, even with low sample size, if both VEGF and PGE2 levels increase post treatment the response rate to chemotherapy is significantly lower (55% versus 88% if both VEGF and PGE2 decrease post treatment, p=0.05). Thus, both VEGF and PGE2 are critical factors in determining response rate. Whether COX-2 activity is driving both factors or whether VEGF is independently regulated is yet to be determined. Clinical Response versus Dendritic cell (DCs) / T-cell data: Data revealed highly important trends that warrant future investigation. Patients with increased B7H4 (an immunosuppressive molecule expressed on tolerizing DCs) were non-responders while patients with decreased B7H4 were responders. In contrast, responders had increased levels of CD80 and CD86 (co-stimulatory molecules expressed on activating DCs). VEGF/PGE2 Change versus Dendritic/T-cell data: When VEGF increased post treatment, B7H4 and FoxP3 (T regulatory cells) increased, while CD80, CD86, and CD8 decreased. The association between VEGF and immune cells post chemotherapy treatment is the first indication that VEGF may regulate immune cell function possibly independent of COX-2 activity. These data suggest that anti-VEGF therapy (which may include COX-2 inhibitor) may not only augment responses to chemotherapy but may also augment immune responses post chemotherapy.
Citation Information: Cancer Res 2009;69(2 Suppl):Abstract nr 5110.
Collapse
Affiliation(s)
- BA Pockaj
- 1 Departments of Surgery, Immunology, Statistics, and Medical Oncology, Mayo Clinic School of Medicine, Scottsdale, AZ
| | - P Mukherjee
- 1 Departments of Surgery, Immunology, Statistics, and Medical Oncology, Mayo Clinic School of Medicine, Scottsdale, AZ
| | - TL Tinder
- 1 Departments of Surgery, Immunology, Statistics, and Medical Oncology, Mayo Clinic School of Medicine, Scottsdale, AZ
| | - CA Klosterman
- 1 Departments of Surgery, Immunology, Statistics, and Medical Oncology, Mayo Clinic School of Medicine, Scottsdale, AZ
| | - JB Allred
- 1 Departments of Surgery, Immunology, Statistics, and Medical Oncology, Mayo Clinic School of Medicine, Scottsdale, AZ
| | - V Roy
- 1 Departments of Surgery, Immunology, Statistics, and Medical Oncology, Mayo Clinic School of Medicine, Scottsdale, AZ
| | - EA Perez
- 1 Departments of Surgery, Immunology, Statistics, and Medical Oncology, Mayo Clinic School of Medicine, Scottsdale, AZ
| |
Collapse
|
36
|
Roy V, LaPlant BR, Gross GG, Bane CL, Palmieri FM. Phase II trial of weekly nab (nanoparticle albumin-bound)-paclitaxel (nab-paclitaxel) (Abraxane) in combination with gemcitabine in patients with metastatic breast cancer (N0531). Ann Oncol 2008; 20:449-53. [PMID: 19087987 DOI: 10.1093/annonc/mdn661] [Citation(s) in RCA: 105] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Nanoparticle albumin-bound (nab)-paclitaxel has better efficacy and practically eliminates the risk of hypersensitivity reactions associated with solvent-based paclitaxel. We studied weekly nab-paclitaxel and gemcitabine combination in an open-label one-stage, phase II trial in patients with previously untreated metastatic breast cancer (MBC). Nab-paclitaxel (125 mg/m(2)) and gemcitabine (1000 mg/m(2)) were administered on days 1 and 8 of a 21-day cycle until disease progression. Fifty patients were enrolled. Forty (80%) had visceral organ involvement and 30 (60%) had >or= 3 sites of metastases. Four (8%) and 21 (42%) patients had complete and partial responses by Response Evaluation Criteria in Solid Tumors (RECIST) criteria. Median duration of response was 6.9 months [95% confidence interval (CI) 5.7, not reached], median progression-free survival (PFS) 7.9 months (95% CI 5.4-10 months), and median overall survival (OS) was not reached. PFS and OS at 6 months were 60% (95% CI 48% to 76%) and 92% (95% CI 85% to 100%), respectively. Therapy was well tolerated. Neutropenia was commonest toxicity (42% and 12% grades 3 and 4 neutropenia). Only one patient developed febrile neutropenia. Significant activity and favorable toxicity profile provides a basis for considering this regimen for further evaluation in phase III trials or in combination with biologic agents.
Collapse
Affiliation(s)
- V Roy
- Division of Hematology-Oncology, Mayo Clinic, Jacksonville, FL 32224, USA.
| | | | | | | | | | | |
Collapse
|
37
|
Simpson L, Rajkumar SV, Dispenzieri A, Lacy MQ, Hayman S, Roy V, Stewart K, Gertz MA, Greipp PR, Kumar S. High incidence of diarrhea in patients on long term therapy with lenalidomide and dexamethasone for multiple myeloma. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.8586] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
38
|
Roy V, Pockaj BA, Northfelt DW, Allred JB, Liu H, Nikcevich DA, Mattar BI, Perez EA. N0338 phase II trial of docetaxel and carboplatin administered every two weeks as induction therapy for stage II or III breast cancer. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.563] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
39
|
Roy V, Merali Z, Poulter MO, Anisman H. Anxiety responses, plasma corticosterone and central monoamine variations elicited by stressors in reactive and nonreactive mice and their reciprocal F1 hybrids. Behav Brain Res 2007; 185:49-58. [PMID: 17692933 DOI: 10.1016/j.bbr.2007.07.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2007] [Revised: 07/06/2007] [Accepted: 07/09/2007] [Indexed: 11/25/2022]
Abstract
Stressor-provoked anxiety, plasma corticosterone, and variations of brain monoamine turnover are influenced by genetic factors, but may also be moderated by early life experiences. To evaluate the contribution of maternal influences, behavioral and neurochemical stress responses were assessed in strains of mice that were either stressor-reactive or -resilient (BALB/cByJ and C57BL/6ByJ, respectively) as well as in their reciprocal F(1) hybrids. BALB/cByJ mice demonstrated poorer maternal behaviors than did C57BL/6ByJ dams, irrespective of the pups being raised (inbred or F(1) hybrids). The BALB/cByJ mice appeared more anxious than C57BL/6ByJ mice, exhibiting greater reluctance to step-down from a platform and a greater startle response. Although the F(1) behavior generally resembled that of the C57BL/6ByJ parent strain, in the step-down test the influence of maternal factors were initially evident among the F(1) mice (particularly males) with a BALB/cByJ dam. However, over trials the C57BL/6ByJ-like behavior came to predominate. BALB/cByJ mice also exhibited greater plasma corticosterone elevations, 5-HT utilization in the central amygdala (CeA), and greater NE turnover in the paraventricular nucleus of the hypothalamus (PVN). Interestingly, among the F(1)'s corticosterone and 5-HIAA in the CeA resembled that of the BALB/cByJ parent strain, whereas MHPG accumulation in the PVN was more like that of C57BL/6ByJ mice. It seems that, to some extent, maternal factors influenced anxiety responses in the hybrids, but did not influence the corticosterone or the monoamine variations. The inheritance profiles suggest that anxiety was unrelated to either the corticosterone or monoamine changes.
Collapse
Affiliation(s)
- V Roy
- UPRES PSY.CO EA 1780, Faculté des Sciences, Université de Rouen, Mont Saint Aignan, France
| | | | | | | |
Collapse
|
40
|
Kumar S, Dispenzieri A, Lacy MQ, Hayman SR, Buadi FK, Gastineau DA, Litzow MR, Fonseca R, Roy V, Rajkumar SV, Gertz MA. Impact of lenalidomide therapy on stem cell mobilization and engraftment post-peripheral blood stem cell transplantation in patients with newly diagnosed myeloma. Leukemia 2007; 21:2035-42. [PMID: 17581613 DOI: 10.1038/sj.leu.2404801] [Citation(s) in RCA: 271] [Impact Index Per Article: 15.9] [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: 01/28/2023]
Abstract
While initial therapies have become highly effective with introduction of lenalidomide and bortezomib and patients may opt for delayed stem cell transplantation, it is important to collect stem cells for future transplant. Given its increasing use as initial therapy, we examined if lenalidomide had any impact on the ability to collect peripheral blood stem cells (PBSC). We studied the entire cohort of patients with myeloma undergoing PBSC mobilization at our institution during a 5-year period, comparing the results between patients receiving different initial therapies. Among those mobilized with granulocyte-colony stimulating factor (G-CSF) alone, there was a significant decrease in total CD34(+) cells collected (P<0.001), average daily collection (P<0.001), day 1 collection (P<0.001) and increased number of aphereses (P=0.004) in patients treated with lenalidomide compared to those receiving dexamethasone, thalidomide-dexamethasone or VAD. A similar trend was seen in those mobilized with chemotherapy and G-CSF. A trend was seen towards decreased PBSC yield with increasing duration of lenalidomide therapy as well as increasing age (P=0.002). There was no effect on quality of PBSC collected based on similar engraftment across all groups. We recommend collection of PBSC within 6 months of initiation of therapy with lenalidomide containing regimens to minimize the risk of mobilization failures.
Collapse
Affiliation(s)
- S Kumar
- Divisions of Hematology, Mayo Clinic, Rochester, MN, USA.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
41
|
Roy V, LaPlant BR, Gross GG, Bane CL, Palmieri FM, Perez EA. NCCTG phase II trial N0531of weekly nab-paclitaxel (nab-p) in combination with gemcitabine (gem) in patients with metastatic breast cancer (MBC). J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.1048] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
1048 Background: Previous trials with p plus gem show significant antitumor activity in MBC. Nab-p has lower toxicity compared to p with similar therapeutic effects. This study assessed proportion of confirmed tumor responses and toxicity profile of this combination. Methods: Single stage phase II study enrolled patients (pts) with measurable MBC eligible for 1st line chemotherapy (chemo). Pts treated (tx) with nab-p 125 mg/m2 followed by gem 1,000 mg/m2 days 1 and 8 of 21 day cycle. Dose modifications allowed for both drugs. Primary endpoint was proportion of confirmed responses; complete response (CR), partial response (PR) by RESIST criteria on two consecutive evaluations at least 6 weeks apart. 41 evaluable pts required to test the null hypothesis that the confirmed response rate was at most 40% against the alternative of at least 60%. Results: 50 pts enrolled 11/05 to 5/06. Median age 56 (29–86). 40 pts (80%) visceral disease, 34 (68%) ER positive, 28 (56%) PR positive, 1 (2%) HER2 positive, 1 (2%) prior trastuzumab treatment (tx). 25 (50%) had prior adjuvant chemo, including 15 (30%) prior taxane. Median follow-up 7 mos (3–12). Median of 6 cycles of tx completed (1–15). 41 pts discontinued tx, due to progression (41%), pt refusal (27%), adverse events (17%), alternate tx (7%). Confirmed response rate 48% (95% CI: 34–63%): 4 CR, 20 PR. Median duration of response 6.6 mos (95% CI: 5.7, not reached), median progression-free survival (PFS) 7.9 mos (95% CI: 5.3–9.3). Rate of overall survival (OS) at 6 mos 91% (95% CI: 84–100%), 6 month PFS 58% (95% CI: 45–74%). Median OS not reached. 30 pts required dose delays on total of 52 cycles, mostly due to hematologic AEs. 9 pts (19%) had grade (gr) 4 adverse event (AE), 32 (67%) had maximum gr 3 AE. Most common gr 3/4 AEs: neutropenia (52%), fatigue (26%), anemia (14%), dyspnea (14%), thrombocytopenia (12%). Four pts had gr 3 neuropathy. Conclusions: Nab-paclitaxel in combination with gem has clear activity in patients with MBC. Manageable hematologic, but no other significant toxicities. Study ongoing to correlate efficacy with caveolin-1 levels with results expected Spring 2007. Follow up study of this combination with an anti-angiogenesis agent is in development. No significant financial relationships to disclose.
Collapse
Affiliation(s)
- V. Roy
- Mayo Clinic, Jacksonville, FL; Mayo Clinic, Rochester, MN; Roger Maris Cancer Center, Fargo, ND; Hematology & Oncology of Dayton Inc., Dayton, OH; North Central Cancer Treatment Group
| | - B. R. LaPlant
- Mayo Clinic, Jacksonville, FL; Mayo Clinic, Rochester, MN; Roger Maris Cancer Center, Fargo, ND; Hematology & Oncology of Dayton Inc., Dayton, OH; North Central Cancer Treatment Group
| | - G. G. Gross
- Mayo Clinic, Jacksonville, FL; Mayo Clinic, Rochester, MN; Roger Maris Cancer Center, Fargo, ND; Hematology & Oncology of Dayton Inc., Dayton, OH; North Central Cancer Treatment Group
| | - C. L. Bane
- Mayo Clinic, Jacksonville, FL; Mayo Clinic, Rochester, MN; Roger Maris Cancer Center, Fargo, ND; Hematology & Oncology of Dayton Inc., Dayton, OH; North Central Cancer Treatment Group
| | - F. M. Palmieri
- Mayo Clinic, Jacksonville, FL; Mayo Clinic, Rochester, MN; Roger Maris Cancer Center, Fargo, ND; Hematology & Oncology of Dayton Inc., Dayton, OH; North Central Cancer Treatment Group
| | - E. A. Perez
- Mayo Clinic, Jacksonville, FL; Mayo Clinic, Rochester, MN; Roger Maris Cancer Center, Fargo, ND; Hematology & Oncology of Dayton Inc., Dayton, OH; North Central Cancer Treatment Group
| |
Collapse
|
42
|
Stewart AK, Bergsagel PL, Greipp PR, Dispenzieri A, Gertz MA, Hayman SR, Kumar S, Lacy MQ, Lust JA, Russell SJ, Witzig TE, Zeldenrust SR, Dingli D, Reeder CB, Roy V, Kyle RA, Rajkumar SV, Fonseca R. A practical guide to defining high-risk myeloma for clinical trials, patient counseling and choice of therapy. Leukemia 2007; 21:529-34. [PMID: 17230230 DOI: 10.1038/sj.leu.2404516] [Citation(s) in RCA: 162] [Impact Index Per Article: 9.5] [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: 12/22/2022]
Abstract
Clinical outcomes for multiple myeloma (MM) are highly heterogeneous and it is now clear that pivotal genetic events are the primary harbingers of such variation. These findings have broad implications for counseling, choice of therapy and the design and interpretation of clinical investigation. Indeed, as in acute leukemias and non-hodgkins lymphoma, we believe it is no longer acceptable to consider MM a single disease entity. As such, the accurate diagnosis of MM subtypes and the adoption of common criteria for the identification and stratification of MM patients has become critical. Herein, we provide a consensus high-risk definition and offer practical guidelines for the adoption of routine diagnostic testing. Although acknowledging that more refined classifications will continue to be developed, we propose that the definition of high-risk disease (any of the t(4;14), t(14;16), t(14;20), deletion 17q13, aneuploidy or deletion chromosome 13 by metaphase cytogenetics, or plasma cell labeling index >3.0) be adopted. This classification will identify most of the 25% of MM patients for whom current therapies are inadequate and for whom investigational regimens should be vigorously pursued. Conversely, the 75% of patients remaining have more favorable outcomes using existing - albeit non-curative - therapeutic options.
Collapse
Affiliation(s)
- A K Stewart
- Department of Medicine, Division of Hematology-Oncology, Mayo Clinic College of Medicine, Scottsdale, AZ 85259, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
43
|
Abstract
The possible outcomes of a collision between a two-pulse bound state and a single pulse in the stretched-pulse fiber laser are examined experimentally. The changes experienced by the pulse bound state during the collision process account for the various observed scenarios. In particular, it is seen that the relative speed and pulse number need not be conserved in the process. A mechanism that helps explain interactions among the colliding pulses is discussed.
Collapse
|
44
|
Roy V, Piché M, Babin F, Schinn G. Nonlinear wave mixing in a multilongitudinal-mode erbium-doped fiber laser. Opt Express 2005; 13:6791-6797. [PMID: 19498695 DOI: 10.1364/opex.13.006791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The emission spectrum of an erbium-doped fiber ring laser is shown to result from the nonlinear wave mixing taking place between the multiple oscillating longitudinal modes. The dependence of the resultant spectral broadening upon the signal power circulating in the laser cavity is investigated both theoretically and experimentally. In the case considered here, the extent of this spectral broadening is shown to be restrained only by the spectrally discriminating element inserted in the laser cavity. Predictions of the numerical simulations for the signal buildup and propagation in the laser cavity are found to be in good agreement with the experiment.
Collapse
|
45
|
Roy V, Qiao J, de Campos-Lima P, Caruso M. Direct evidence for the absence of intercellular trafficking of VP22 fused to GFP or to the herpes simplex virus thymidine kinase. Gene Ther 2005; 12:169-76. [PMID: 15483667 DOI: 10.1038/sj.gt.3302394] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [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: 11/09/2022]
Abstract
The treatment of solid tumors by retroviral delivery of the herpes simplex virus thymidine kinase (TK) followed by ganciclovir (GCV) treatment has so far shown only limited success in patients. One major drawback in this approach is the lack of efficient in vivo gene delivery to cancer cells. Although, the transduction of every single tumor cell is not a requirement since the bystander effect (BE) mediated by gap junctions allows the diffusion of the toxic GCV metabolites from TK-expressing cells toward untransduced cells. To render the TK/GCV approach more potent, and independent of the level of gap junctions, we have tested the efficiency of a TK mutant (TK30) fused to VP22, a herpes simplex protein that seems to be capable of intercellular trafficking. We failed to detect an increase in the BE with cells expressing VP22 fused to TK30 versus cells containing TK30 alone, and this result forced us to reinvestigate the trafficking properties of VP22. Using very sensitive Western blot and fluorescence assays, we were not able to detect the spread of VP22 fused either to TK30 or GFP. These results indicate that VP22 cannot be used as a cargo to translocate TK30 or GFP.
Collapse
Affiliation(s)
- V Roy
- Le Centre de Recherche en Cancérologie de l'Université Laval, L'Hôtel-Dieu de Québec, Centre Hospitalier Universitaire de Québec, Québec, Canada
| | | | | | | |
Collapse
|
46
|
Roy V, Monti-Dedieu L, Chaminade N, Siljak-Yakovlev S, Aulard S, Lemeunier F, Montchamp-Moreau C. Evolution of the chromosomal location of rDNA genes in two Drosophila species subgroups: ananassae and melanogaster. Heredity (Edinb) 2005; 94:388-95. [PMID: 15726113 DOI: 10.1038/sj.hdy.6800612] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.9] [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: 11/08/2022] Open
Abstract
The evolution of the chromosomal location of ribosomal RNA gene clusters and the organization of heterochromatin in the Drosophila melanogaster group were investigated using fluorescence in situ hybridization and DAPI staining to mitotic chromosomes. The investigation of 18 species (11 of which were being examined for the first time) belonging to the melanogaster and ananassae subgroups suggests that the ancestral configuration consists of one nucleolus organizer (NOR) on each sex chromosome. This pattern, which is conserved throughout the melanogaster subgroup, except in D. simulans and D. sechellia, was observed only in the ercepeae complex within the ananassae subgroup. Both sex-linked NORs must have been lost in the lineage leading to D. varians and in the ananassae and bipectinata complexes, whereas new sites, characterized by intra-species variation in hybridization signal size, appeared on the fourth chromosome related to heterochromatic rearrangements. Nucleolar material is thought to be required for sex chromosome pairing and disjunction in a variety of organisms including Drosophila. Thus, either remnant sequences, possibly intergenic spacer repeats, are still present in the sex chromosomes which have lost their NORs (as observed in D. simulans and D. sechellia), or an alternative mechanism has evolved.
Collapse
Affiliation(s)
- V Roy
- Laboratoire Populations, Génétique et Evolution, Centre National de la Recherche Scientifique, Gif-sur-Yvette Cedex, France
| | | | | | | | | | | | | |
Collapse
|
47
|
Abstract
We report the observation of a new regime of operation in the stretched-pulse fiber laser in which two groups of bound pulses travel in the cavity at different velocities. The pulse groups collide periodically and remain apparently unaltered after the collisions. The observed group-velocity difference is shown to exhibit a strong dependence on the time interval between the pulses in each bound state.
Collapse
Affiliation(s)
- M Olivier
- Centre d'Optique, Photonique et Laser, Université Laval, Québec, Quebec G1K 7P4, Canada.
| | | | | | | |
Collapse
|
48
|
Kumar S, Muhinga M, Sumithan G, Roy C, Roy V, Coelho R. Ross procedure in children. Indian J Thorac Cardiovasc Surg 2004. [DOI: 10.1007/s12055-004-0347-6] [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
|
49
|
Selby GB, Ali LI, Carter TH, Veseley S, Roy V. The influence of health insurance on outcomes of related-donor hematopoietic stem cell transplantation for AML and CML. Biol Blood Marrow Transplant 2003; 7:576. [PMID: 11760090 DOI: 10.1016/s1083-8791(01)70018-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
50
|
Chapillon P, Patin V, Roy V, Vincent A, Caston J. Effects of pre- and postnatal stimulation on developmental, emotional, and cognitive aspects in rodents: a review. Dev Psychobiol 2002; 41:373-87. [PMID: 12430161 DOI: 10.1002/dev.10066] [Citation(s) in RCA: 148] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Interactions between the organism and its environment, during pregnancy as well as during the postnatal period, can lead to important neurobehavioral changes. We briefly review the literature, and successively present the main results from our laboratory concerning the behavioral effects of prenatal stress, differential rearing conditions, and postnatal handling. We show that submitting primiparous DA/HAN rats to an acute emotional stress (exposure to a cat) at gestational day10, 14, or 19 leads to greatly increased mortality of pups and to decreased body weight of surviving animals. The effects of such a stressor on emotional reactivity are less obvious. Cognitive processes are impaired depending on the learning task. Enriched environments restore abnormal behaviors (emotional reactivity, motor skills, motor and spatial learning) due to brain trauma or genetic deficiencies. In any case, environmental enrichment does prevent or slow down aging effects. The effects of postnatal handling noted when using classical tests of emotional reactivity also are clear when defensive reaction paradigms are used. Furthermore, pregnant females that are early handled are less anxious than nonhandled females. We hypothesize that, when subjected to a stressor, the offspring of early-handled females would be protected from the deleterious effects of this stress compared to pups of nonhandled females.
Collapse
Affiliation(s)
- P Chapillon
- UPRES PSY.CO 1780, Laboratoire de Neurobiologie de l'Apprentissage Université de Rouen, Faculté des Sciences, 76821 Mont-Saint-Aignan Cedex, France.
| | | | | | | | | |
Collapse
|