1
|
Diesh C, Stevens GJ, Xie P, De Jesus Martinez T, Hershberg EA, Leung A, Guo E, Dider S, Zhang J, Bridge C, Hogue G, Duncan A, Morgan M, Flores T, Bimber BN, Haw R, Cain S, Buels RM, Stein LD, Holmes IH. JBrowse 2: a modular genome browser with views of synteny and structural variation. Genome Biol 2023; 24:74. [PMID: 37069644 PMCID: PMC10108523 DOI: 10.1186/s13059-023-02914-z] [Citation(s) in RCA: 39] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 03/20/2023] [Indexed: 04/19/2023] Open
Abstract
We present JBrowse 2, a general-purpose genome annotation browser offering enhanced visualization of complex structural variation and evolutionary relationships. It retains core features of JBrowse while adding new views for synteny, dotplots, breakpoints, gene fusions, and whole-genome overviews. It allows users to share sessions, open multiple genomes, and navigate between views. It can be embedded in a web page, used as a standalone application, or run from Jupyter notebooks or R sessions. These improvements are enabled by a ground-up redesign using modern web technology. We describe application functionality, use cases, performance benchmarks, and implementation notes for web administrators and developers.
Collapse
Affiliation(s)
- Colin Diesh
- Department of Bioengineering, Stanley Hall, University of California, Berkeley, CA 94720 USA
| | - Garrett J Stevens
- Department of Bioengineering, Stanley Hall, University of California, Berkeley, CA 94720 USA
| | - Peter Xie
- Department of Bioengineering, Stanley Hall, University of California, Berkeley, CA 94720 USA
| | | | - Elliot A. Hershberg
- Department of Bioengineering, Stanley Hall, University of California, Berkeley, CA 94720 USA
| | - Angel Leung
- Department of Bioengineering, Stanley Hall, University of California, Berkeley, CA 94720 USA
| | - Emma Guo
- Department of Bioengineering, Stanley Hall, University of California, Berkeley, CA 94720 USA
| | - Shihab Dider
- Department of Bioengineering, Stanley Hall, University of California, Berkeley, CA 94720 USA
| | - Junjun Zhang
- Adaptive Oncology, Ontario Institute for Cancer Research, MaRS Centre, 661 University Avenue, Suite 510, Toronto, ON M5G 0A3 Canada
| | - Caroline Bridge
- Adaptive Oncology, Ontario Institute for Cancer Research, MaRS Centre, 661 University Avenue, Suite 510, Toronto, ON M5G 0A3 Canada
| | - Gregory Hogue
- Adaptive Oncology, Ontario Institute for Cancer Research, MaRS Centre, 661 University Avenue, Suite 510, Toronto, ON M5G 0A3 Canada
| | - Andrew Duncan
- Adaptive Oncology, Ontario Institute for Cancer Research, MaRS Centre, 661 University Avenue, Suite 510, Toronto, ON M5G 0A3 Canada
| | - Matthew Morgan
- Center for Applied Systems and Software, 224 Milne Computer Center, 1800 SW Campus Way, Oregon State University, Corvallis, OR 97331 USA
| | - Tia Flores
- Center for Applied Systems and Software, 224 Milne Computer Center, 1800 SW Campus Way, Oregon State University, Corvallis, OR 97331 USA
| | - Benjamin N. Bimber
- Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, OR 97006 USA
| | - Robin Haw
- Adaptive Oncology, Ontario Institute for Cancer Research, MaRS Centre, 661 University Avenue, Suite 510, Toronto, ON M5G 0A3 Canada
| | - Scott Cain
- Adaptive Oncology, Ontario Institute for Cancer Research, MaRS Centre, 661 University Avenue, Suite 510, Toronto, ON M5G 0A3 Canada
| | - Robert M. Buels
- Department of Bioengineering, Stanley Hall, University of California, Berkeley, CA 94720 USA
| | - Lincoln D. Stein
- Adaptive Oncology, Ontario Institute for Cancer Research, MaRS Centre, 661 University Avenue, Suite 510, Toronto, ON M5G 0A3 Canada
| | - Ian H. Holmes
- Department of Bioengineering, Stanley Hall, University of California, Berkeley, CA 94720 USA
| |
Collapse
|
2
|
Emerich C, Debiasi M, Caorsi F, Beal S, Flores T, Dutra C. P1.06-007 EGFR Status Evaluation and Epidemiological Profile in Patients with NSCLC in a Brazilian Public Health Institution. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.901] [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: 11/24/2022]
|
3
|
Ponce LV, Flores T, Sosa-Saldaña M, Alvira FC, Bilmes GM. Laser-induced breakdown spectroscopy determination of toxic metals in fresh fish. Appl Opt 2016; 55:254-258. [PMID: 26835760 DOI: 10.1364/ao.55.000254] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A method based on laser induced breakdown spectroscopy (LIBS) for monitoring lead and copper accumulation in edible fish, particularly "tilapia del Nilo" (Oreochromis niloticus) is presented. The capability of this analytical method is compared with results obtained by atomic absorption spectrometry. Detection limits by LIBS are 25 parts per million (ppm) for Pb and 100 ppm for Cu, values that are below the maximum permissible levels of some international standards. Application of LIBS detection allows the development of portable instruments for contamination control of edible fish.
Collapse
|
4
|
Martínez I, Flores T, Aragón G, Otálora M, Rubio-Salcedo M. What factors influence the occurrence of the genus Degelia (a threatened lichen) in central Spain? FUNGAL ECOL 2014. [DOI: 10.1016/j.funeco.2014.03.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
5
|
Rosa CC, Flores T, Pieczarka JC, Rossi RV, Sampaio MIC, Rissino JD, Amaral PJS, Nagamachi CY. Genetic and morphological variability in South American rodent Oecomys (Sigmodontinae, Rodentia): evidence for a complex of species. J Genet 2013; 91:265-77. [PMID: 23271012 DOI: 10.1007/s12041-012-0182-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The rodent genus Oecomys (Sigmodontinae) comprises ~16 species that inhabit tropical and subtropical forests in Central America and South America. In this study specimens of Oecomys paricola Thomas, 1904 from Belém and Marajó island, northern Brazil, were investigated using cytogenetic, molecular and morphological analyses. Three karyotypes were found, two from Belém (2n = 68, fundamental number (FN) = 72 and 2n = 70, FN = 76) and a third from Marajó island (2n = 70, FN = 72). No molecular or morphological differences were found between the individuals with differing cytotypes from Belém, but differences were evident between the individuals from Belém and Marajó island. Specimens from Belém city region may represent two cryptic species because two different karyotypes are present in the absence of significant differences in morphology and molecular characteristics. The Marajó island and Belém populations may represent distinct species that have been separated for some time, and are in the process of morphological and molecular differentiation as a consequence of reproductive isolation at the geographic and chromosomal levels. Thus, the results suggest that O. paricola may be a complex of species.
Collapse
Affiliation(s)
- C C Rosa
- Laboratório de Citogenética, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém 66.075-900, Brazil
| | | | | | | | | | | | | | | |
Collapse
|
6
|
Moros C, Navarrete MJ, Flores T, Pascual JM, Bernad VM. P244: Rates, microbiology and risk factors of central line associated bloodstream infection in a neonatal intensive care unit from 2003 to 2012. Antimicrob Resist Infect Control 2013. [PMCID: PMC3687710 DOI: 10.1186/2047-2994-2-s1-p244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
7
|
Sebastián E, Martín J, McDonald GB, Flores T, Rodríguez A, Blanco A, Vazquez L, de Fuentes I, Caballero MD. Cryptosporidium parvum infection vs GVHD after hematopoietic SCT: diagnosis by PCR with resolution of symptoms. Bone Marrow Transplant 2010; 46:612-4. [DOI: 10.1038/bmt.2010.156] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
8
|
Ponce L, Flores T, Arronte A, Flores A, Wetter NU, Frejlich J. Plasma Emission Spectra of Opuntia Nopalea Obtained with Microsecond Laser Pulses. ACTA ACUST UNITED AC 2008. [DOI: 10.1063/1.2926832] [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: 11/14/2022]
|
9
|
Pérez-Caro M, Gutierrez-Cianca N, González-Herrero I, López-Hernández I, Flores T, Orfao A, Sánchez-Martín M, Gutiérrez-Adán A, Pintado B, Sánchez-García I. Sustained leukaemic phenotype after inactivation of BCR-ABLp190 in mice. Oncogene 2006; 26:1702-13. [PMID: 16983340 DOI: 10.1038/sj.onc.1209968] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [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
Pharmacological inactivation of cancer genes or products is being used as a strategy for therapy in oncology. To investigate the potential role of BCR-ABLp190 cessation in leukaemia development, we generated mice carrying a tetracycline-repressible BCR-ABLp190 transgene. These mice were morphologically normal at birth, and developed leukaemias. Disease was characterized by the presence of B-cell blasts co-expressing myeloid markers, reminiscent of the human counterpart. BCR-ABLp190 activation can initiate leukaemia in both young and adult mice. Transitory expression of BCR-ABLp190 is enough to develop leukaemia. Suppression of the BCR-ABLp190 transgene in leukaemic CombitTA-p190 mice did not rescue the malignant phenotype, indicating that BCR-ABLp190 is not required to maintain the disease in mice. Similar results were obtained by inactivation of BCR-ABLp190 with STI571 (Gleevec; Novartis, East Hanover, NJ, USA) in leukaemic CombitTA-p190 mice. However, gradual suppression of BCR-ABLp190 in leukaemic CombitTA-p190 mice identified a minimum level of BCR-ABLp190 expression necessary to revert the specific block in B-cell differentiation in the leukaemic cells. Overall, the findings indicate that BCR-ABLp190 appears to cause epigenetic and/or genetic changes in tumour-maintaining cells that render them insensitive to BCR-ABLp190 inactivation.
Collapse
Affiliation(s)
- M Pérez-Caro
- Laboratorio 13, Instituto de Biología Molecular y Celular del Cáncer, CSIC/Universidad de Salamanca, Campus Unamuno, Salamanca, Spain
| | | | | | | | | | | | | | | | | | | |
Collapse
|
10
|
Elías Y, Poblano A, Flores B, Arteaga C, Flores T, Pineda G. P04.10 Thinner abuse alters peak of frequency of EEG spectra analyses. Clin Neurophysiol 2006. [DOI: 10.1016/j.clinph.2006.06.227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
11
|
Pérez-Mancera PA, González-Herrero I, Maclean K, Turner AM, Yip MY, Sánchez-Martín M, García JL, Robledo C, Flores T, Gutiérrez-Adán A, Pintado B, Sánchez-García I. SLUG (SNAI2) overexpression in embryonic development. Cytogenet Genome Res 2006; 114:24-9. [PMID: 16717446 DOI: 10.1159/000091924] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [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: 08/22/2005] [Accepted: 09/30/2005] [Indexed: 11/19/2022] Open
Abstract
The Snail-related zinc-finger transcription factor, SLUG (SNAI2), is critical for the normal development of neural crest-derived cells and loss-of-function SLUG mutations have been proven to cause piebaldism and Waardenburg syndrome type 2 in a dose-dependent fashion. However, little is known about the consequences of SLUG overexpression in embryonic development. We report SLUG duplication in a child with a unique de novo 8q11.2-->q13.3 duplication associated with tetralogy of Fallot, submucous cleft palate, renal anomalies, hypotonia and developmental delay. To investigate the effects of Slug overexpression on development, we analyzed mice carrying a Slug transgene. These mice were morphologically normal at birth, inferring that Slug overexpression is not sufficient to cause overt morphogenetic defects. In the adult mice, there was a 20% incidence of sudden death, cardiomegaly and cardiac failure associated with incipient mesenchymal tumorigenesis. These findings, while not directly implicating Slug in congenital and acquired heart disease, raise the possibility that Slug overexpression may contribute to specific cardiac phenotypes and cancer development.
Collapse
Affiliation(s)
- P A Pérez-Mancera
- Laboratorio 13, Instituto de Biología Molecular y Celular del Cáncer, CSIC/Universidad de Salamanca, Salamanca, Spain
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
12
|
Abstract
Abstract Patterns in the composition of assemblages of microbat species sampled during the late dry season (the 'build-up') in north Australian savannas were assessed against a range of environmental factors as well as four a priori defined habitat types (riparian, escarpments, coastal and woodlands). Distinct species assemblages were most strongly associated with topographic and climatic variables. There were also limited associations with vegetation structure, fire and local roost potential but no associations with insects or water availability. Total species diversity at sample sites was associated with distance to rivers and rainfall. In general, species assemblages were not clearly defined and the number of significant environmental associations was relatively few. We compare these associations with those reported for bat assemblages elsewhere in Australia.
Collapse
Affiliation(s)
- D J Milne
- Biodiversity Conservation, Department of Natural Resources, Environment and the Arts and Tropical Savannas Cooperative Research Centre, PO Box 496, Palmerston, NT, 0831, Australia
| | - M Armstrong
- Biodiversity Conservation, Department of Natural Resources, Environment and the Arts and Tropical Savannas Cooperative Research Centre, PO Box 496, Palmerston, NT, 0831, Australia
| | - A Fisher
- Biodiversity Conservation, Department of Natural Resources, Environment and the Arts and Tropical Savannas Cooperative Research Centre, PO Box 496, Palmerston, NT, 0831, Australia
| | - T Flores
- Biodiversity Conservation, Department of Natural Resources, Environment and the Arts and Tropical Savannas Cooperative Research Centre, PO Box 496, Palmerston, NT, 0831, Australia
| | - C R Pavey
- Biodiversity Conservation, Department of Natural Resources, Environment and the Arts, Alice Springs, Northern Territory, Australia
| |
Collapse
|
13
|
Milne DJ, Armstrong M, Fisher A, Flores T, Pavey CR. A comparison of three survey methods for collecting bat echolocation calls and species-accumulation rates from nightly Anabat recordings. Wildl Res 2004. [DOI: 10.1071/wr03011] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Bat surveys are frequently undertaken using ultrasonic detectors to determine the species present in an area on the basis of the identity of echolocation calls. We compared three techniques for using the Anabat II detector: the detector pointed along tracks (flyways) versus the detector pointed across tracks (non-flyways); recording output to audio cassette (analogue) versus direct recording to computer (digital); and active hand-held recording versus static automatic recording. In addition, we derived a species-accumulation curve from all-night Anabat recordings in the wet–dry tropics of the Northern Territory. We found no significant difference between flyway and non-flyway recordings; significantly more calls were identified from digital recordings; and significantly more species were detected using hand-held than static recordings. Species-accumulation analysis suggests that the minimum time required to achieve a satisfactory (80%) inventory of bat species at a site is during the three-hour period immediately after sunset. We use our findings to make recommendations for the design of bat surveys using the Anabat II detector.
Collapse
|
14
|
García JL, Hernandez JM, Gutiérrez NC, Flores T, González D, Calasanz MJ, Martínez-Climent JA, Piris MA, Lopéz-Capitán C, González MB, Odero MD, San Miguel JF. Abnormalities on 1q and 7q are associated with poor outcome in sporadic Burkitt's lymphoma. A cytogenetic and comparative genomic hybridization study. Leukemia 2003; 17:2016-24. [PMID: 14513052 DOI: 10.1038/sj.leu.2403080] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Comparative genomic hybridization (CGH) studies have demonstrated a high incidence of chromosomal imbalances in non-Hodgkin's lymphoma. However, the information on the genomic imbalances in Burkitt's Lymphoma (BL) is scanty. Conventional cytogenetics was performed in 34 cases, and long-distance PCR for t(8;14) was performed in 18 cases. A total of 170 changes were present with a median of four changes per case (range 1-22). Gains of chromosomal material (143) were more frequent than amplifications (5) or losses (22). The most frequent aberrations were gains on chromosomes 12q (26%), Xq (22%), 22q (20%), 20q (17%) and 9q (15%). Losses predominantly involved chromosomes 13q (17%) and 4q (9%). High-level amplifications were present in the regions 1q23-31 (three cases), 6p12-p25 and 8p22-p23. Upon comparing BL vs Burkitt's cell leukemia (BCL), the latter had more changes (mean 4.3 +/- 2.2) than BL (mean 2.7 +/- 3.2). In addition, BCL cases showed more frequently gains on 8q, 9q, 14q, 20q, and 20q, 9q, 8q and 14q, as well as losses on 13q and 4q. Concerning outcome, the presence of abnormalities on 1q (ascertained either by cytogenetics or by CGH), and imbalances on 7q (P=0.01) were associated with a short survival.
Collapse
Affiliation(s)
- J L García
- Servicio de Hematología and Centro de Investigación del Cáncer, Universidad de Salamanca-CSIC, Spain
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Pérez Plasencia D, Gómez González JL, Santa Cruz Ruiz S, Muñoz Herrera A, Mateos Pérez MM, Flores T, Pardal JL. [Clinical descriptive study of 40 patients with carcinoma of the nasopharynx in advanced stage in an area of low epidemiological risk]. Acta Otorrinolaringol Esp 2002; 53:473-80. [PMID: 12487069 DOI: 10.1016/s0001-6519(02)78339-8] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The nasopharyngeal carcinoma in Spain, low risk geographical area, is a rare tumor. This is the cause why there few papers about it in our country. We have carried out a muestral descriptive statistical study. We have selected among all the patients diagnosed of nasopharyngeal carcinoma a big group who, have been treated with induction chemotherapy followed by radiotherapy with or without surgery, they presented very complete clinical histories in the Departments of E.N.T., Oncology and Radiotherapy that allowed us to compare all the picked up data and this increased, without doubt, the reliability of them. The results obtained in the different examined variables of our patients are the same that those we found in literature. The nasopharyngeal carcinoma is a tumor that usually affects young patients, of both sexes, without previous consumption of alcohol and tobacco and they are diagnosed in advanced stages. The rhinologic symptoms are the most frequent ones but the cervical nodes are the usual cause for consulting a doctor with a long diagnostic interval. There is a prevalence in the undifferentiated tumors showed by histology.
Collapse
Affiliation(s)
- D Pérez Plasencia
- Servicios de O.R.L. y Patología Cérvico-Facial, Hospital Clínico de Salamanca, Paseo de San Vicente, 182, 37007 Salamanca
| | | | | | | | | | | | | |
Collapse
|
16
|
Hernández JM, García JL, Gutiérrez NC, Mollejo M, Martínez-Climent JA, Flores T, González MB, Piris MA, San Miguel JF. Novel genomic imbalances in B-cell splenic marginal zone lymphomas revealed by comparative genomic hybridization and cytogenetics. Am J Pathol 2001; 158:1843-50. [PMID: 11337382 PMCID: PMC1891967 DOI: 10.1016/s0002-9440(10)64140-5] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Splenic marginal zone lymphoma (SMZL) has recently been recognized in the World Health Organization classification of hematological diseases as distinct type of non-Hodgkin's lymphoma. In contrast to the well-established chromosomal changes associated with other B-cell non-Hodgkin's lymphoma, few genetic alterations have been found associated with SMZL. The aim of our study was to analyze by comparative genomic hybridization (CGH) the chromosomal imbalances in 29 patients with SMZL and to correlate these findings with clinical and biological characteristics and patient outcome. In 21 cases, cytogenetic studies were simultaneously performed. Most of the patients (83%) displayed genomic imbalances. A total of 111 DNA copy number changes were detected with a median of four abnormalities per case (range, 1 to 12). Gains (n = 92) were more frequent than losses (n = 16), while three high-level amplifications (3q26-q29, 5p11-p15, and 17q22-q25) were observed. The most frequent gains involved 3q (31%), 5q (28%), 12q and 20q (24% each), 9q (21%), and 4q (17%). Losses were observed in 7q (14%) and 17p (10%). SMZL patients with genetic losses had a shorter survival than the remaining SMZL patients (P < 0.05). In summary, chromosomal imbalances in regions 3q, 4q, 5q, 7q, 9q, 12q, and 20q have been detected by CGH in SMZL. Patients with SMZL displaying genetic losses by CGH had a short survival.
Collapse
Affiliation(s)
- J M Hernández
- Servicio de Hematología, Hospital Universitario and Centro de Investigación del Cáncer, Universidad de Salamanca-CSIC, Salamanca, Spain.
| | | | | | | | | | | | | | | | | |
Collapse
|
17
|
Duan WM, Westerman M, Flores T, Low WC. Survival of intrastriatal xenografts of ventral mesencephalic dopamine neurons from MHC-deficient mice to adult rats. Exp Neurol 2001; 167:108-17. [PMID: 11161598 DOI: 10.1006/exnr.2000.7537] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Previous studies of neural xenografts have used immunosuppressive agents to prevent graft rejection. In the present study we have examined the survival of mouse dopamine neurons lacking either MHC class I or MHC class II molecules transplanted into rat brains and the host immune and inflammatory responses against the xenografts. Survival of neural grafts was immunocytochemically determined at 4 days, 2 weeks, and 6 weeks after transplantation by counting tyrosine hydroxylase (TH)-positive cells in the graft areas. In addition, the host immune and inflammatory responses against neural xenografts were evaluated by semiquantitatively rating MHC class I and class II antigen expression, accumulation of macrophages and activated microglia, and infiltration of CD4- and CD8-positive T-lymphocytes. For the negative controls, the mean number of TH-positive cells in rats that received wild-type mouse tissue progressively decreased at various time periods following transplantation. In contrast, intrastriatal grafting of either MHC class I or MHC class II antigen-depleted neural xenografts resulted in a prolonged survival and were comparable to cyclosporin A-treated rats that had received wild-type mouse tissue. These results indicate that genetically modified donor tissue lacking MHC molecules can be used to prevent neural xenograft rejection.
Collapse
Affiliation(s)
- W M Duan
- Department of Neurosurgery, University of Minnesota Medical School, Minneapolis, Minnesota 55455, USA
| | | | | | | |
Collapse
|
18
|
Pérez-Losada J, Sánchez-Martín M, Rodríguez-García MA, Pérez-Mancera PA, Pintado B, Flores T, Battaner E, Sánchez-Garćia I. Liposarcoma initiated by FUS/TLS-CHOP: the FUS/TLS domain plays a critical role in the pathogenesis of liposarcoma. Oncogene 2000; 19:6015-22. [PMID: 11146553 DOI: 10.1038/sj.onc.1204018] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The most common chromosomal translocation in liposarcomas, t(12;16)(q13;p11), creates the FUS/TLS-CHOP fusion gene. We previously developed a mouse model of liposarcoma by expressing FUS-CHOP in murine mesenchymal stem cells. In order to understand how FUS-CHOP can initiate liposarcoma, we have now generated transgenic mice expressing altered forms of the FUS-CHOP protein. Transgenic mice expressing high levels of CHOP, which lacks the FUS domain, do not develop any tumor despite its tumorigenicity in vitro and widespread activity of the EF1alpha promoter. These animals consistently show the accumulation of a glycoprotein material within the terminally differentiated adipocytes, a characteristic figure of liposarcomas associated with FUS-CHOP. On the contrary, transgenic mice expressing the altered form of FUS-CHOP created by the in frame fusion of the FUS domain to the carboxy end of CHOP (CHOP-FUS) developed liposarcomas. No tumors of other tissues were found in these transgenic mice despite widespread activity of the EF1alpha promoter. The characteristics of the liposarcomas arising in the CHOP-FUS mice were very similar to those previously observed in our FUS-CHOP transgenic mice indicating that the FUS domain is required not only for transformation but also influences the phenotype of the tumor cells. These results provide evidence that the FUS domain of FUS-CHOP plays a specific and critical role in the pathogenesis of liposarcoma.
Collapse
Affiliation(s)
- J Pérez-Losada
- Instituto de Bilogia Molecular y Celular del Cancer, Centro de Investigacion del Cancer, CSIC/Universidad de Salamanca, Spain
| | | | | | | | | | | | | | | |
Collapse
|
19
|
Pérez-Losada J, Pintado B, Gutiérrez-Adán A, Flores T, Bañares-González B, del Campo JC, Martín-Martín JF, Battaner E, Sánchez-García I. The chimeric FUS/TLS-CHOP fusion protein specifically induces liposarcomas in transgenic mice. Oncogene 2000; 19:2413-22. [PMID: 10828883 DOI: 10.1038/sj.onc.1203572] [Citation(s) in RCA: 106] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The characteristic t(12;16)(q13;p11) chromosomal translocation, which leads to gene fusion that encodes the FUS-CHOP chimeric protein, is associated with human liposarcomas. The altered expression of FUS-CHOP has been implicated in a characteristic subgroup of human liposarcomas. We have introduced the FUS-CHOP transgene into the mouse genome in which the expression of the transgene is successfully driven by the elongation factor 1alpha (EF1alpha) promoter to all tissues. The consequent overexpression of FUS-CHOP results in most of the symptoms of human liposarcomas, including the presence of lipoblasts with round nuclei, accumulation of intracellular lipid, induction of adipocyte-specific genes and a concordant block in the differentiation program. We have demonstrated that liposarcomas in the FUS-CHOP transgenic mice express high levels of the adipocyte regulatory protein PPARgamma, whereas it is not expressed in embryonic fibroblasts from these animals following induction to differentiation toward the adipocyte lineage, indicating that the in vitro system does not really reflect the in vivo situation and the developmental defect is downstream of PPARgamma expression. No tumors of other tissues were found in these transgenic mice despite widespread activity of the EF1alpha promoter. This establishes FUS-CHOP overexpression as a key determinant of human liposarcomas and provide the first in vivo evidence for a link between a fusion gene created by a chromosomal translocation and a solid tumor.
Collapse
Affiliation(s)
- J Pérez-Losada
- Departamento de Proliferación y Diferenciacion Celular, Instituto de Microbiología Bioquímica, CSIC/Universidad de Salamanca, Edificio Departamental, Avda del Campo Charro s/n, 37007-Salamanca, Spain
| | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Cobaleda C, Gutiérrez-Cianca N, Pérez-Losada J, Flores T, García-Sanz R, González M, Sánchez-García I. A primitive hematopoietic cell is the target for the leukemic transformation in human philadelphia-positive acute lymphoblastic leukemia. Blood 2000; 95:1007-13. [PMID: 10648416] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023] Open
Abstract
BCR-ABL is a chimeric oncogene generated by translocation of sequences from the chromosomal counterpart (c-ABL gene) on chromosome 9 into the BCR gene on chromosome 22. Alternative chimeric proteins, BCR-ABL(p190) and BCR-ABL(p210), are produced that are characteristic of chronic myelogenous leukemia (CML) and Philadelphia chromosome-positive acute lymphoblastic leukemia (Ph(1)-ALL). In CML, the transformation occurs at the level of pluripotent stem cells. However, Ph(1)-ALL is thought to affect progenitor cells with lymphoid differentiation. Here we demonstrate that the cell capable of initiating human Ph(1)-ALL in non-obese diabetic mice with severe combined immunodeficiency disease (NOD/SCID), termed SCID leukemia-initiating cell (SL-IC), possesses the differentiative and proliferative capacities and the potential for self-renewal expected of a leukemic stem cell. The SL-ICs from all Ph(1)-ALL analyzed, regardless of the heterogeneity in maturation characteristics of the leukemic blasts, were exclusively CD34(+ )CD38(-), which is similar to the cell-surface phenotype of normal SCID-repopulating cells. This indicates that normal primitive cells, rather than committed progenitor cells, are the target for leukemic transformation in Ph(1)-ALL.
Collapse
Affiliation(s)
- C Cobaleda
- Departamento de Proliferación y Diferenciación Celular, Instituto de Microbiología Bioquímica, Universidad de Salamanca, Salamanca, Spain
| | | | | | | | | | | | | |
Collapse
|
21
|
Vazquez L, Caballero D, Cañizo CD, Lopez C, Hernandez R, Gonzalez I, Flores T, San Miguel JF. Allogeneic peripheral blood cell transplantation for hypereosinophilic syndrome with myelofibrosis. Bone Marrow Transplant 2000; 25:217-8. [PMID: 10673685 DOI: 10.1038/sj.bmt.1702102] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [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]
Abstract
Patients with hypereosinophilic syndrome (HES) display a very heterogeneous clinical picture ranging from asymptomatic cases to very aggressive forms. We report a 38-year-old woman with progressive HES who developed severe myelofibrosis and was treated by allogeneic stem cell transplantation, using peripheral blood (PBSCT) instead of bone marrow as the source of progenitor cells, after conditioning with cytoxan and busulphan. To the best of our knowledge, this is the first case of HES with myelofibrosis treated with PBSCT. The patient remains alive 8 months post-PBSCT, and bone marrow fibrosis has significantly decreased following transplantation. Bone Marrow Transplantation (2000) 25, 217-218.
Collapse
Affiliation(s)
- L Vazquez
- Hematology Service, University Hospital of Salamanca; and Centro de Investigación del Cancer (CIC), University of Salamanca, CSIC, Spain
| | | | | | | | | | | | | | | |
Collapse
|
22
|
Beà S, Ribas M, Hernández JM, Bosch F, Pinyol M, Hernández L, García JL, Flores T, González M, López-Guillermo A, Piris MA, Cardesa A, Montserrat E, Miró R, Campo E. Increased number of chromosomal imbalances and high-level DNA amplifications in mantle cell lymphoma are associated with blastoid variants. Blood 1999; 93:4365-74. [PMID: 10361135] [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: 02/12/2023] Open
Abstract
Mantle cell lymphomas (MCLs) are characterized by 11q13 chromosomal translocations and cyclin D1 overexpression. The secondary genetic and molecular events involved in the progression of these tumors are not well known. In this study, we have analyzed 45 MCLs (32 typical and 13 blastoid variants) by comparative genomic hybridization (CGH). To identify the possible genes included in the abnormal chromosome regions, selected cases were analyzed for P53, P16(INK4a), RB, C-MYC, N-MYC, BCL2, BCL6, CDK4, and BMI-1 gene alterations. The most frequent imbalances detected by CGH were gains of chromosomes 3q (49%), 7p (27%), 8q (22%), 12q (20%), 18q (18%), and 9q34 (16%) and losses of chromosomes 13 (44%), 6q (27%), 1p (24%), 11q14-q23 (22%), 10p14-p15 (18%), 17p (16%), and 9p (16%). High-level DNA amplifications were identified in 11 different regions of the genome, predominantly in 3q27-q29 (13%), 18q23 (9%), and Xq28 (7%). The CGH analysis allowed the identification of regional consensus areas in most of the frequently involved chromosomes. Chromosome gains (P =. 02) and losses (P =.01) and DNA amplifications (P =.015) were significantly higher in blastoid variants. The significant differences between blastoid and typical tumors were gains of 3q, 7p, and 12q, and losses of 17p. CGH losses of 17p correlated with P53 gene deletions and mutations. Similarly, gains of 12q and high-level DNA amplifications of 10p12-p13 were associated with CDK4 and BMI-1 gene amplifications, respectively. One of 2 cases with 8q24 amplification showed C-MYC amplification by Southern blot. Alterations in 2p, 3q, 13, and 18q were not associated with N-MYC, BCL6, RB, or BCL2 alterations, respectively, suggesting that other genes may be the targets of these genetic abnormalities in MCLs. Increased number of gains (0 v 1-4 v >4 gains per case) (P =.002), gains of 3q (P =.02), gains of 12q (P =.03), and losses of 9p (P =. 003) were significantly associated with a shorter survival of the patients. These results indicate that an increased number of chromosome imbalances are associated with blastoid variants of MCLs and may have prognostic significance.
Collapse
MESH Headings
- Blotting, Southern
- Chromosome Aberrations
- Chromosome Deletion
- Chromosomes, Human, Pair 12
- Chromosomes, Human, Pair 17
- Chromosomes, Human, Pair 3
- Chromosomes, Human, Pair 7
- Female
- Gene Amplification
- Humans
- Lymphocytes/pathology
- Lymphoma, Non-Hodgkin/genetics
- Lymphoma, Non-Hodgkin/pathology
- Male
- Nucleic Acid Hybridization
- Translocation, Genetic
Collapse
Affiliation(s)
- S Beà
- Hematopathology Section, Laboratory of Anatomic Pathology, Department of Hematology, Hospital Clínic, Villarroel, 170, 08036-Barcelona, Spain
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Piris MA, Mollejo M, Campo E, Menárguez J, Flores T, Isaacson PG. A marginal zone pattern may be found in different varieties of non-Hodgkin's lymphoma: the morphology and immunohistology of splenic involvement by B-cell lymphomas simulating splenic marginal zone lymphoma. Histopathology 1998; 33:230-9. [PMID: 9777389 DOI: 10.1046/j.1365-2559.1998.00478.x] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.1] [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: 11/20/2022]
Abstract
AIMS Splenic marginal zone lymphoma (SMZL) is characterized by a micronodular infiltrate of the splenic white pulp, centred on pre-existing follicles, with a peripheral rim of 'marginal' zone B-cells, always accompanied by a variable degree of red pulp infiltration. These histological features can be closely mimicked by a variety of other small B-cell lymphomas when they involve the spleen, which makes recognition of SMZL difficult. We therefore have compared the histopathological and immunohistochemical features of other non-Hodgkin's lymphoma (NHL) types with those of SMZL. METHODS AND RESULTS We selected cases of splenic involvement by different types of B-cell lymphoma, including mantle cell lymphoma (MCL), follicular lymphoma (FL), immunocytoma (IM) and lymphocytic lymphoma (B-CLL). A micronodular pattern and marginal zone differentiation were both found to be frequently present in FL and MCL, and with lesser frequency in IM and B-CLL. The main morphological feature useful for differential diagnosis was the cytological composition of the white pulp tumoral nodules. SMZL is distinguished by characteristic dimorphic cytology, different from the monomorphic cytology of MCL, and the distinctive mixture of centroblasts and centrocytes which is the rule in FL. B-CLL could also be identified on the basis of the polymorphic cytology including small lymphocytes and prolymphocytes, whereas cases diagnosed as IM show prominent plasmacytic differentiation, lacking the features of the other lymphoma types. Immunohistochemistry was particularly useful for the differential diagnosis. Thus the recognition of MCL was facilitated by the identification of cyclin D1 and CD43 reactivity, while FL could be recognized by the lack of IgD expression or the distinctive pattern of Ki67 staining found in SMZL. B-CLL cells were CD23+, CD43+. CONCLUSION The results of this study provide morphological and immunohistological information useful in the recognition of the different varieties of NHLs when involving the spleen and the differential diagnosis of SMZL.
Collapse
Affiliation(s)
- M A Piris
- Department of Pathology, Hospital Virgen de la Salud, Toledo, Spain
| | | | | | | | | | | |
Collapse
|
24
|
Abstract
MOTIVATION The user-friendly, graphical X-windows interface (WPI) to the GCG sequence analysis package can often not be used due to the lack of an X-server on PC or Macintosh computers. Because Web browsers like Netscape are much more common on those platforms, we decided to develop W2H, a WWW interface to the GCG Sequence Analysis Software Package with nearly the same functionality as the X-windows interface WPI. RESULTS The new WWW interface (W2H) to the GCG Sequence Analysis Software Package (Wisconsin Package) supports modern Web technologies, like client-pull method, or embedded scripting language, and provides a reasonable platform independence. The interface is quite comprehensive with advanced features like sequence selector, search set builder, enzyme chooser, access to sequence databases, uploading client files to the GCG server or displaying and manipulating graphical outputs in addition to GCG analysis programs. W2H also manages secure access to both GCG server and user data. For special environments, like workshops, conferences and company intranets, there is a special mode (Intranet mode) with less security constraints. The behaviour of W2H is mostly controlled by meta-data files describing the applications and giving a base for dynamic creation of HTML documents. This paper presents mainly the development approaches used, and architectural design aspects of W2H. AVAILABILITY W2H is available by ftp://ftp.ebi.ac. uk/pub/software/unix/w2h or ftp://genome.dkfz-heidelberg.de/pub/w2h CONTACT m.senger@ebi.ac.uk
Collapse
Affiliation(s)
- M Senger
- DKFZ - German Cancer Research Center, Department of Molecular Biophysics, Im Neuenheimer Feld 280, D-69120 Heidelberg, Germany.
| | | | | | | | | | | |
Collapse
|
25
|
Hainaut P, Hernandez T, Robinson A, Rodriguez-Tome P, Flores T, Hollstein M, Harris CC, Montesano R. IARC Database of p53 gene mutations in human tumors and cell lines: updated compilation, revised formats and new visualisation tools. Nucleic Acids Res 1998; 26:205-13. [PMID: 9399837 PMCID: PMC147235 DOI: 10.1093/nar/26.1.205] [Citation(s) in RCA: 343] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Since 1989, about 570 different p53 mutations have been identified in more than 8000 human cancers. A database of these mutations was initiated by M. Hollstein and C. C. Harris in 1990. This database originally consisted of a list of somatic point mutations in the p 53 gene of human tumors and cell lines, compiled from the published literature and made available in a standard electronic form. The database is maintained at the International Agency for Research on Cancer (IARC) and updated versions are released twice a year (January and July). The current version (July 1997) contains records on 6800 published mutations and will surpass the 8000 mark in the January 1998 release. The database now contains information on somatic and germline mutations in a new format to facilitate data retrieval. In addition, new tools are constructed to improve data analysis, such as a Mutation Viewer Java applet developed at the European Bioinformatics Institute (EBI) to visualise the location and impact of mutations on p53 protein structure. The database is available in different electronic formats at IARC (http://www.iarc. fr/p53/homepage.htm ) or from the EBI server (http://www.ebi.ac.uk ). The IARC p53 website also provides reports on database analysis and links with other p53 sites as well as with related databases. In this report, we describe the criteria for inclusion of data, the revised format and the new visualisation tools. We also briefly discuss the relevance of p 53 mutations to clinical and biological questions.
Collapse
Affiliation(s)
- P Hainaut
- International Agency for Research on Cancer, 150 cours Albert-Thomas, 69372 Lyon Cedex 08, France.
| | | | | | | | | | | | | | | |
Collapse
|
26
|
Amigo ML, Caballero MD, Vazquez L, Flores T, López A, San Miguel JF. Immune thrombocytopenic purpura secondary to endometriosis. Haematologica 1997; 82:602-3. [PMID: 9407732] [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: 02/05/2023] Open
Abstract
In this paper, we describe a patient with immune thrombocytopenic purpura (ITP) secondary to endometriosis. To our knowledge, this is the first reported case presenting such an association. Surgical eradication of the endometriosis was the only effective treatment for the thrombocytopenia. The pathogenic connection between both disorders seems to be an altered immune function.
Collapse
Affiliation(s)
- M L Amigo
- Servicio de Hematología, Hospital Universitario de Salamanca, Spain
| | | | | | | | | | | |
Collapse
|
27
|
Pérez-Simón JA, Hernández-Rivas JM, Flores T. Lymph node myeloid metaplasia associated with chronic neutrophilic leukemia. Haematologica 1997; 82:126. [PMID: 9107102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
|
28
|
Santa Cruz S, Muñoz A, Blanco P, Gómez JL, Flores T, Cordero M, Sancipriano JA. [Kukuchi's disease of the neck: report of two cases]. Acta Otorrinolaringol Esp 1996; 47:414-6. [PMID: 8991414] [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: 02/03/2023]
Abstract
Kikuchi's disease is an unusual disease, described in 1972, that is characterized by lymph node enlargement and fever. Cervical lymph nodes are affected so often that the ear, nose and throat specialist should be aware of this entity during differential diagnosis. Two cases treated in our service are reported and the literature is reviewed.
Collapse
Affiliation(s)
- S Santa Cruz
- Servicio de ORL y Patología Cérvico-Facial, Hospital Universitario de Salamanca
| | | | | | | | | | | | | |
Collapse
|
29
|
Wuttig M, Junghans S, Flores T, Blügel S. Comment on "Structure of the Mn-induced Cu(100) c(2 x 2) surface". Phys Rev B Condens Matter 1996; 53:7551-7554. [PMID: 9982208 DOI: 10.1103/physrevb.53.7551] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
30
|
Pena-Penabad C, Hernández-Vicente I, Hernández-Martín A, García-Silva J, Flores T, Armijo M. IgA mesangial nephropathy and autoimmune haemolytic anaemia associated with linear IgA bullous dermatosis. Br J Dermatol 1995; 133:146-8. [PMID: 7669631 DOI: 10.1111/j.1365-2133.1995.tb02514.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
|
31
|
Abstract
The present work reports on the findings obtained by fine-needle aspiration of two pilomatrixomas located on the upper limbs whose diagnosis was confirmed histologically. In both cases, the cytology disclosed a proliferation of small round basaloid cells that were dispersed and grouped in clusters together with squamous cells and abundant multinucleate giant cells. The differential diagnosis with other neoplasms is discussed.
Collapse
Affiliation(s)
- J Ortiz
- Department of Pathology, Clinical Hospital of Salamanca, Spain
| | | | | | | | | | | |
Collapse
|
32
|
Mateos Rodríquez F, Fuertes Martín A, Flores T, Alonso Sáncheez JM, Jiménez López A. [Multiple pulmonary nodules as the initial manifestation of medullary carcinoma of the thyroid]. An Med Interna 1994; 11:362-3. [PMID: 7981368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
|
33
|
Flores T, Carbajo S, Carbajo-Pérez E. Evaluation of cellular proliferation in human biopsy samples of lymphoid tissue according to the expression of AgNORs. Anal Cell Pathol 1994; 6:3-8. [PMID: 8130129] [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: 01/28/2023] Open
Abstract
The proportions of cells with a high expression of AgNORs, as directly assessed under the light microscope, and those of Ki-67-immunoreactive cells were divided into three categories (low, < 25%; intermediate, 25-50%; high, > 50%) and compared to a series of 41 human biopsy samples of lymphoid tissue. Irrespective of histological features a strong correlation was found between both variables (contingency coefficient = 0.8; P < 0.001). It is concluded that direct evaluation of cells with a high expression of AgNORs may serve as an index of proliferative activity in biopsy samples of lymphoid tissue.
Collapse
Affiliation(s)
- T Flores
- Department of Pathology, Hospital Clinico of Salamanca, Spain
| | | | | |
Collapse
|
34
|
|
35
|
Carbajo-Perez E, Alberca V, Vicente-Villardon V, Flores T, Carbajo S. Expression of argyrophilic nucleolar organizer regions (AgNORs) can be used to assess cellular proliferation as shown in rat thymic sections. ACTA ACUST UNITED AC 1993. [DOI: 10.1007/bf02388062] [Citation(s) in RCA: 3] [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: 11/30/2022]
|
36
|
Carbajo-Perez E, Alberca V, Vicente-Villardon V, Flores T, Carbajo S. Expression of argyrophilic nucleolar organizer regions (AgNORs) can be used to assess cellular proliferation as shown in rat thymic sections. Histochem J 1993; 25:548-53. [PMID: 8407364] [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] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Silver-stained nucleolar organizer regions (AgNORs) were studied in thymic sections from 4- and 30-day-old rats. By direct examination under the light microscope cells with a low or high content of AgNORs (type I and type II cells, respectively) were identified and their relative numbers calculated. The mean area of AgNORs per cell was calculated for each type of cell and age group. Additionally, the proportion of cells labelled with bromodeoxyuridine was calculated in sections from the same animals. Visual identification of type I and type II cells was confirmed by a significant (p < 0.01) difference in the mean AgNOR area in both types of cell. Both the proportion of cells with a high expression of AgNORs (type II cells) and that of bromodeoxyuridine-labelled cells were significantly greater (p < 0.01) in 4-day-old rats than in 30-day-old rats. A significant correlation was found between both variables (R2 = 0.45; p = 0.002), the relation being best between both variables and age (R2 = 0.91; p = < 0.001). These data offer support for an easy interpretation of the AgNOR reaction in which the proportion of cells with a high expression of AgNORs can be used as an index of proliferative activity in a tissue sample.
Collapse
Affiliation(s)
- E Carbajo-Perez
- Department of Morphology and Cell Biology, Faculty of Medicine, University of Oviedo, Spain
| | | | | | | | | |
Collapse
|
37
|
Ortiz J, Silva J, Flores T. [Mucinous adenocarcinoma of the urachus. Apropos of a case]. Actas Urol Esp 1993; 17:76-8. [PMID: 8383913] [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: 01/30/2023]
Abstract
This report present one case of mucinous adenocarcinoma of the urachus, a very uncommon tumour with eccentric clinical behaviour. It includes a brief description of both its macro and microscopic appearance, establishing the differential diagnosis both with adenocarcinoma of the vesical dome and the metastatic tumours which can affect the bladder. Also, there is a brief comment on the main anatomo-clinical characteristics of these tumours.
Collapse
Affiliation(s)
- J Ortiz
- Servicio de Anatomía Patológica, Hospital Clínico Universitario, Salamanca
| | | | | |
Collapse
|
38
|
Affiliation(s)
- L Ferrández
- Department of Orthopaedic Surgery, University Clinical Hospital, Salamanca, Spain
| | | | | | | | | |
Collapse
|
39
|
Shepherd JK, Flores T, Rodgers RJ, Blanchard RJ, Blanchard DC. The anxiety/defense test battery: influence of gender and ritanserin treatment on antipredator defensive behavior. Physiol Behav 1992; 51:277-85. [PMID: 1557438 DOI: 10.1016/0031-9384(92)90141-n] [Citation(s) in RCA: 54] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The anxiety/defense test battery has been developed to measure defensive reactions in laboratory rats to both direct exposure to, and stimuli associated with, a natural predator, the domestic cat. The present investigation confirmed earlier findings with each test providing a distinct behavioral profile following exposure to predator stimuli. In addition, the data showed a consistent gender difference in a number of these behavioral measures, indicating that females are more defensive than males. These effects included reliability higher levels of cat avoidance and crouching, with lower levels of transits, lying and drinking for cat-exposed females. Similarly, females exposed to a cat odor stimulus showed a reliably higher level of stretch attend and flat back approach behaviors (risk assessment) towards the stimulus block. The 5-HT2 antagonist, ritanserin, failed to provide significant indication of anxiolytic activity, and had minimal influence on antipredator defensive behavior. An important exception to this profile was a reliable decrease in stretch attend behavior to a cat odor stimulus in females but not males. Overall, these findings suggest a complex relationship between gender, antipredator defensive behavior, and anxiolytic drug treatment.
Collapse
Affiliation(s)
- J K Shepherd
- Bekesy Laboratory of Neurobiology, John A. Burns School of Medicine, University of Hawaii, Honolulu
| | | | | | | | | |
Collapse
|
40
|
García-Macías MC, Abad M, Alonso MJ, Flores T, Bullón A. Masson's vegetant intravascular hemangioendothelioma. Fine needle aspiration cytology, histology and immunohistochemistry of a case. Acta Cytol 1990; 34:175-8. [PMID: 2108526] [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: 12/30/2022]
Abstract
Masson's vegetant hemangioendothelioma is a benign intravascular tumor, sometimes confused with such malignant vascular tumors as angiosarcoma, whose clinical appearance is nonspecific and whose diagnosis can only be established through microscopic examination. The fine needle aspiration (FNA) cytologic findings together with the histologic and immunohistochemical findings of such a tumor in a 22-year-old man are presented. Cytologically, the material obtained by FNA consisted of two distinct populations of cells. One type of cell had large nuclei (sometimes displaced towards the periphery), finely granular chromatin, prominent nucleoli and abundant globular cytoplasm. The second type of cell had spindle-shaped or oval nuclei, granular chromatin and scanty eosinophilic cytoplasm. Although these findings may permit the cytologic recognition of this entity, the aspirate in this case was interpreted as showing a vascular mesenchymal tumor of probable malignancy. Histologic examination of the excised tumor, aided by immunoperoxidase studies for factor VIII antigen that revealed the endothelial nature of the proliferating cells, established the correct diagnosis.
Collapse
Affiliation(s)
- M C García-Macías
- Department of Pathology, University of Salamanca School of Medicine, Spain
| | | | | | | | | |
Collapse
|
41
|
Tomás JF, San Miguel JF, Martín MJ, Martínez R, Moraleda JM, González M, Cañizo MC, Ojeda E, Ramos F, Flores T. [Non-Hodgkin's lymphomas. I. Clinico-biological features in a series of 98 patients]. Sangre (Barc) 1988; 33:361-6. [PMID: 3247617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
42
|
Martín García J, Macías Núñez JF, Tomero JA, Bondia A, Rodríguez Commes JL, Corbacho L, Gómez Arroyo JR, Grande J, Tabernero JM, Flores T. [Acute polymyositis and acute renal failure]. Rev Clin Esp 1985; 176:420-2. [PMID: 4023326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
43
|
Lisker R, Mutchinick O, Reyes ME, Santos MA, Flores T, García Ramos G. [Autosomal recessive heredity in a Mexican family with torsion dystonia]. Rev Invest Clin 1984; 36:265-8. [PMID: 6515159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
|
44
|
Fuertes A, Pastor I, Solés J, Olmos JM, Jiménez A, Flores T, Montero J. [Neuroblastoma and spinal cord compression]. Med Clin (Barc) 1983; 81:409. [PMID: 6645705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
|
45
|
Alonso ME, Figueroa HH, Zermeño F, Escobar A, Flores T. [Charcot-Marie-Tooth disease. Report of a family (author's transl)]. Rev Invest Clin 1981; 33:303-7. [PMID: 7330503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
|
46
|
Méndez JA, Fernández-Sanz J, Flores T, Marcos F, Armas JR, Galera H. [Urothelial tumor of the renal pelvis in horseshoe kidney]. ARCH ESP UROL 1979; 32:273-8. [PMID: 475483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The authors describe a case of tumour of transitional cells in patient with a horseshoe-shaped kidney, the suspected diagnosis of which was reached with the aid of a selective cinearteriography. They stress the low incidence of the same in the literature consulted which reveals the importance of studying the patients with this malformation in an attempt to prevent complications and in particular, to make an early diagnosis of a possible malignant transformation.
Collapse
|
47
|
Abstract
A case of necrotizing sialometaplasia of the lower lip, a previously unreported location for this lesion, is presented. In the past, other cases of this benign process occuring in this site may have been confused with squamous-cell or mucoepidermoid carcinoma. In order to arrive at the correct diagnosis, an ample biopsy of the lesion is mandatory.
Collapse
|
48
|
Sanders GB, Flores T, Arriola P. Congenital absence of the gallbladder and cystic duct: a review of the literature and report of a case. Am Surg 1968; 34:750-4. [PMID: 5680933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
|