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Sarmiento E, Zatarain E, Jaramillo M, Navarro J, Sousa I, Ortiz C, Navas P, Carbone J. Lower Titers of IgA Antibodies to Pneumococcal Polysaccharide Antigens after Vaccination are a Risk Factor for Development of Bacterial Infection after Heart Transplantation. J Heart Lung Transplant 2021. [DOI: 10.1016/j.healun.2021.01.427] [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] Open
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Ruiz ÁJ, Vargas-Uricoechea H, Urina-Triana M, Román-González A, Isaza D, Etayo E, Quintero A, Molina DI, Toro JM, Parra G, Merchán A, Cadena A, Yupanqui Lozano H, Cárdenas JM, Quintero ÁM, Botero R, Jaramillo M, Arteaga JM, Vesga-Angarita B, Valenzuela-Plata E, Betancur-Valencia M. Dyslipidaemias and their treatment in high complexity centres in Colombia. Clin Investig Arterioscler 2020; 32:101-110. [PMID: 32284160 DOI: 10.1016/j.arteri.2019.11.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 11/05/2019] [Accepted: 11/19/2019] [Indexed: 06/11/2023]
Abstract
BACKGROUND AND OBJECTIVE Data is scarce on the distribution of different types of dyslipidaemia in Colombia. The primary objective was to describe the frequency of dyslipidaemias. The secondary objectives were: frequency of cardiovascular comorbidity, statins and other lipid-lowering drugs use, frequency of statins intolerance, percentage of patients achieving c-LDL goals, and distribution of cardiovascular risk (CVR). MATERIALS AND METHODS Cross-sectional study with retrospective data collection from 461 patients diagnosed with dyslipidaemia and treated in 17 highly specialised centres distributed into six geographic and economic regions of Colombia. RESULTS Mean (SD) age was 66.4 (±12.3) years and 53.4% (246) were women. Dyslipidaemias were distributed as follows in order of frequency: mixed dyslipidaemia (51.4%), hypercholesterolaemia (41.0%), hypertriglyceridaemia (5.4%), familial hypercholesterolaemia (3.3%), and low c-HDL (0.7%). The most prescribed drugs were atorvastatin (75.7%) followed by rosuvastatin (24.9%). As for lipid control, 55% of all patients, and 28.6% of those with coronary heart disease, did not achieve their personal c-LDL goal despite treatment. The frequency of statin intolerance was 2.6% in this study. CONCLUSIONS Mixed dyslipidaemia and hypercholesterolaemia are the most frequent dyslipidaemias in Colombia. A notable percentage of patients under treatment with lipid-lowering drugs, including those with coronary heart disease, did not achieve specific c-LDL goals. This poor lipid control may worsen patient's CVR, so that therapeutic strategies need to be changed, either with statin intensification or addition of new drugs in patients with higher CVR.
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Affiliation(s)
| | | | - Miguel Urina-Triana
- Fundación del Caribe para la Investigación Biomédica-Facultad de Ciencias de la Salud, Universidad Simón Bolívar, Barranquilla, Colombia
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Mejía LF, Gil JC, Jaramillo M. Intense pulsed light therapy: A promising complementary treatment for dry eye disease. ACTA ACUST UNITED AC 2019; 94:331-336. [PMID: 31079987 DOI: 10.1016/j.oftal.2019.03.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [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: 11/26/2018] [Revised: 01/31/2019] [Accepted: 03/15/2019] [Indexed: 01/20/2023]
Abstract
OBJECTIVE To propose the Intense Pulsed Light (IPL) therapy as a helpful supplementary treatment in patients with dry eye disease. MATERIAL AND METHODS Retrospective cross sectional design. Medical records of patients in whom dry eye disease symptoms were not satisfactorily controlled with medical therapy alone and who underwent additional IPL with at least three sessions completed. Data were analyzed before therapy and 3weeks after its completion to asses improvement. Determination of symptoms, through a visual analog scale; tear film stability, through tear Break Up Time (tBUT); measurement of tear secretion, through Schirmer Test; and ocular surface staining with Van Bijsterveld score were evaluated. SPSS software and nonparametric analysis of repeated measures were used. The study was approved by the ethics committee. RESULTS 50 eyes from 25 subjects were reviewed. There were 9 males (36%) and 16 females (64%), with a median age of 59years (IQR 52-64). The median of the symptoms scale was 8 (IQR 8-9) and 3 (IQR 2-4) before and after the therapy respectively (P<.05). The median of BUT was 4 (IQR 3-5) and 10 (IQR 8-11), Schirmer test was 13 (IQR 12-15) and 15 (IQR 13-20), and Van Bijsterveld score was 3 (RIC 3-4) and 2 (IQR 2-3) before and after the therapy respectively (P<.05, for all measurements). CONCLUSION IPL treatment has excellent results regarding both: dry eye disease symptoms improvement and in office objective tests such as tBUT, Schirmer test and Van Bijsterveld score; IPL could be considered as an effective adjunct for dry eye disease.
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Affiliation(s)
- L F Mejía
- Head Cornea Service, School of Medicine, CES University, Medellín, Colombia; Ophthalmology Research Service, School of Medicine, CES University, Medellín, Colombia.
| | - J C Gil
- Ophthalmology Research Service, School of Medicine, CES University, Medellín, Colombia
| | - M Jaramillo
- Ophthalmology Service, School of Medicine, CES University, Medellín, Colombia
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Lenferink A, Baardsnes J, Sulea T, Wu C, Acchione M, Jaramillo M, McDonald P, Benard F, Dedhar S. PO-033 Identification and functional evaluation of monoclonal antibodies specifically targeting human carbonic anhydrase IX. ESMO Open 2018. [DOI: 10.1136/esmoopen-2018-eacr25.568] [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: 11/04/2022] Open
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Calahorra L, Cifrian J, Sarmiento E, Ezzahouri I, Bravo C, Lopez S, Laporta R, Ussetti P, Sole A, De Pablos A, Jaramillo M, Carbone J. Elevated Serum BAFF Levels Are Associated with an Increased Risk of Acute Rejection in Lung Recipients. J Heart Lung Transplant 2017. [DOI: 10.1016/j.healun.2017.01.1144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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O'Connor-McCourt M, Koropatnick J, Maleki S, Figueredo R, Tikhomirov I, Jaramillo M. Development of AVID100, a novel antibody–drug conjugate for the treatment of EGFR expressing solid tumors. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)33037-4] [Citation(s) in RCA: 3] [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] [Indexed: 11/29/2022]
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Reyes J, Chaffer M, Sanchez J, Torres G, Macias D, Jaramillo M, Duque PC, Ceballos A, Keefe GP. Evaluation of the efficacy of intramuscular versus intramammary treatment of subclinical Streptococcus agalactiae mastitis in dairy cows in Colombia. J Dairy Sci 2016; 98:5294-303. [PMID: 26074229 DOI: 10.3168/jds.2014-9199] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [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: 12/06/2014] [Accepted: 04/22/2015] [Indexed: 11/19/2022]
Abstract
A randomized controlled trial was performed in 17 Colombian dairy herds to determine the cure risk among cows subclinically infected with Streptococcus agalactiae exposed to 2 antibiotic therapies. Composite milk samples were collected before milking at the onset of the trial (pretreatment) and 2 subsequent times over a period of approximately 63 d. The intramammary application (IMM) of ampicillin-cloxacillin was compared with the intramuscular application (IM) of penethamate hydriodide, and cure risks after an initial and retreatment application were assessed. Cure risk after the initial treatment was higher (82.4%) for the IMM treatment than for IM therapy (65.8%). However, no difference was observed in the cure risk of refractory cases after retreatment (IMM=52.6% vs. IM=51.2%). The cumulative cure risk (both initial and retreatment) was 90.4 and 82.9% for the IMM and IM products, respectively. A 2-level random effects logistic model that controlled for pretreatment cow-level somatic cell count, indicated that IM treatment (odds ratio=0.37) had a lower cure risk than IMM and a tendency for a lower cure risk with increasing baseline somatic cell count. Our findings suggest that both products and administration routes can reduce the prevalence of S. agalactiae in affected herds, but the IMM product had a better efficacy in curing the infection. In addition to the treatment protocol, the cow somatic cell count should be considered when making management decisions for cows infected with S. agalactiae.
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Affiliation(s)
- J Reyes
- Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, Prince Edward Island, C1A 4P3 Canada.
| | - M Chaffer
- Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, Prince Edward Island, C1A 4P3 Canada
| | - J Sanchez
- Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, Prince Edward Island, C1A 4P3 Canada
| | - G Torres
- Tropical Medicine Colombian Institute, CES University, CRA. 43A No. 52 sur-99 Medellín, Antioquia, Colombia
| | - D Macias
- Cooperativa COLANTA, CRA 64C, 72-160 Medellín, Colombia
| | - M Jaramillo
- Cooperativa COLANTA, CRA 64C, 72-160 Medellín, Colombia
| | - P C Duque
- Department of Agricultural and Livestock Sciences, Universidad de Caldas, Calle 65 #26-10, Manizales, Caldas, Colombia
| | - A Ceballos
- Department of Agricultural and Livestock Sciences, Universidad de Caldas, Calle 65 #26-10, Manizales, Caldas, Colombia
| | - G P Keefe
- Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, Prince Edward Island, C1A 4P3 Canada
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Burbano-Figueroa O, Jaramillo M, Moreno-Moran M, Fernández-Izquierdo P. EFFECT OF SULFATE LOADING RATE AND ORGANIC LOADING RATE ON ANAEROBIC BAFFLED REACTORS USED FOR TREATMENT OF SANITARY LANDFILL LEACHATES. Braz J Chem Eng 2015. [DOI: 10.1590/0104-6632.20150322s00003228] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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10
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Sarmiento E, Arraya M, Jaramillo M, Diez P, Fernandez-Yañez J, Palomo J, Navarro J, Carbone J. Intravenous immunoglobulin as an intervention strategy of risk factor modification for prevention of severe infection in heart transplantation. Clin Exp Immunol 2015; 178 Suppl 1:156-8. [PMID: 25546803 DOI: 10.1111/cei.12552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Affiliation(s)
- E Sarmiento
- Transplant Immunology Group, Clinical Immunology Department, Hospital General Universitario Gregorio Marañon, Madrid, Spain
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Ramírez N, Keefe G, Dohoo I, Sánchez J, Arroyave O, Cerón J, Jaramillo M, Palacio L. Herd- and cow-level risk factors associated with subclinical mastitis in dairy farms from the High Plains of the northern Antioquia, Colombia. J Dairy Sci 2014; 97:4141-50. [DOI: 10.3168/jds.2013-6815] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Accepted: 03/16/2014] [Indexed: 11/19/2022]
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Rendón ID, Soto M, Jaramillo M, Palacio AC, Restrepo JA. Tetralogía de Fallot y embarazo. Revista Colombiana de Cardiología 2014. [DOI: 10.1016/j.rccar.2014.04.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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Sarmiento E, Jaramillo M, Navarro J, Rodriguez-Molina J, Fernandez-Yañez J, Palomo J, Gomez-Sanchez M, Crespo-Leiro M, Paniagua M, Almenar L, Cebrian M, Segovia J, Gomez M, Rabago G, Levy B, Mirabet S, Lopez J, Garcia-Guereta L, Carbone J. Humoral Immunity Profiles to Identify CMV-seropositive Heart Recipients at Risk of CMV Disease: A Prospective Multicenter Study. J Heart Lung Transplant 2014. [DOI: 10.1016/j.healun.2014.01.082] [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: 11/17/2022] Open
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14
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Sarmiento E, Jaramillo M, Navarro J, Rodriguez-Molina J, Cifrian J, Laporta R, Ussetti P, Bravo C, Lopez S, De Pablos A, Morales P, Carbone J. Low IgM Anti-Polysaccharide Antibody Response and Severe Infection in a Cohort of Lung Recipients. J Heart Lung Transplant 2014. [DOI: 10.1016/j.healun.2014.01.409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Affiliation(s)
- M. Jaramillo
- Department of Mechanical Engineering-C2200; The University of Texas at Austin; Austin TX 78712-0292 USA
| | - J. H. Koo
- Department of Mechanical Engineering-C2200; The University of Texas at Austin; Austin TX 78712-0292 USA
- Texas Materials Institute; The University of Texas at Austin; Austin Texas USA
- KAI, LLC; Austin TX 78739-0152 USA
| | - M. Natali
- KAI, LLC; Austin TX 78739-0152 USA
- Materials Science and Technology; University of Perugia; Terni Italy
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Sarmiento E, Cifrian J, Laporta R, Ussetti P, Bravo C, Lopez S, Morales P, de Pablos A, Jaramillo M, Navarro J, Rodriguez-Molina J, Carbone J. IgG Immunologic Monitoring To Identify Lung Recipients at Risk of Oportunistic Infections: Prospective Multicenter Study. J Heart Lung Transplant 2013. [DOI: 10.1016/j.healun.2013.01.398] [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: 10/27/2022] Open
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17
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Sarmiento E, Fernandez-Yañez J, Palomo J, Gomez-Sanchez M, Crespo-Leiro M, Paniagua M, Almenar L, Cebrian M, Rabago G, Levy B, Segovia J, Gomez-Bueno M, Lopez J, García-Guereta L, Mirabet S, Jaramillo M, Navarro J, Rodriguez-Molina J, Carbone J. Validation of Humoral Immunity Profiles To Identify Heart Recipients at Risk for Development of Severe Infections: A Multicenter Prospective Study. J Heart Lung Transplant 2013. [DOI: 10.1016/j.healun.2013.01.182] [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: 11/29/2022] Open
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Affiliation(s)
- S Bathala
- Department of Otolaryngology, West Wales General Hospital, Carmarthen, Wales
| | - A Tardolli
- Department of Otolaryngology, West Wales General Hospital, Carmarthen, Wales
| | - M Jaramillo
- Department of Otolaryngology, West Wales General Hospital, Carmarthen, Wales
| | - N Morgan
- Department of Otolaryngology, West Wales General Hospital, Carmarthen, Wales
| | - M Thomas
- Department of Otolaryngology, West Wales General Hospital, Carmarthen, Wales
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Kirschner D, Jaramillo M, Green T, Hapiot F, Leclercq L, Bricout H, Monflier E. Fine tuning of sulfoalkylated cyclodextrin structures to improve their mass-transfer properties in an aqueous biphasic hydroformylation reaction. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.molcata.2008.01.038] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Abelardo E, Jaramillo M, Sheffield E, Tierney P. Anaplastic thyroid carcinoma implantation after fine needle aspiration cytology. J Laryngol Otol 2006; 121:268-70. [PMID: 17040599 DOI: 10.1017/s0022215106003264] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 05/23/2006] [Indexed: 11/07/2022]
Abstract
We report the case of a 59-year-old man with a two-month history of a fast-growing, left-sided neck mass and a 5 mm nodule over a thyroid mass at the site of fine needle aspiration cytology performed four weeks earlier. Histopathological studies confirmed anaplastic carcinoma of the thyroid and cutaneous needle track seeding of the primary tumour. The patient succumbed to extensive disease 10 weeks after initial diagnosis. To our knowledge, this is a rare report of implantation of anaplastic thyroid carcinoma along the track of fine needle aspiration. Some factors involved in needle track seeding are: needle size; number of passes; withdrawing the needle without releasing suction; injecting the tumour at time of biopsy; and inherent characteristics of the lesion (e.g. number of cells dislodged, adhesiveness of cells, amount of stroma present, enzymes released and immunologic characteristics).
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Affiliation(s)
- E Abelardo
- Department of ENT, Southmead Hospital, Bristol, UK
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22
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Hyams AF, Toynton SC, Jaramillo M, Stone LR, Bryson PJ. Facial baroparesis secondary to middle-ear over-pressure: a rare complication of scuba diving. J Laryngol Otol 2006; 118:721-3. [PMID: 15509373 DOI: 10.1258/0022215042244813] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A facial nerve palsy, as a result of middle-ear high pressure, is a rare complication of sub-aqua diving. It may occur as a result of an acute pressure change in the middle ear during ascent in those patients who have experienced difficulty equalizing their middle-ear pressure during the prior descent. We present the case history of this occurring in a 21-year-old diver and discuss the pathophysiology, management and the previous literature. The correct diagnosis of this condition is important if unnecessary, and potentially hazardous, recompression treatment is to be avoided.
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Affiliation(s)
- A F Hyams
- University of Bristol, School of Medical Sciences, University Walk, Bristol, UK
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Repanos C, Singh V, Rajkumar K, Jaramillo M. Antibiotic prophylaxis in clean neck dissections. J Laryngol Otol 2006; 119:243; author reply 243-4. [PMID: 15845204 DOI: 10.1258/0022215053561468] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Luo P, Tsang TC, He X, Gonzalez-Pena V, Jaramillo M, Takeuchi C, Harris DT. Novel amplifier expression vectors producing higher levels of IL-2 led to slower tumor growth and longer survival in vivo. DNA Cell Biol 2006; 24:595-604. [PMID: 16153160 DOI: 10.1089/dna.2005.24.595] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Sufficient levels of gene expression are required for effective gene therapy. One of the major obstacles in gene therapy is the low transgene expression obtained from currently available vector systems. To address this issue, we employed a transcriptional amplifier strategy in a single construct to enhance transgene expression. In the amplifier vectors (pHi-1 and pHi-2), the strong CMV promoter was used to drive a transcriptional factor, Tat, which could transactivate a second promoter (HIV1 LTR or HIV2 LTR) located in the same construct driving the gene of interest. Using the human interleukin-2 (IL-2) cytokine gene, our data showed that the pHi-1/2 amplifier vectors could produce significantly higher IL-2 levels in human lung cancer cells (A549) and breast cancer cells (MCF-7) than that obtained by directly using the CMV promoter alone. Injection of pHi-2-IL-2-modified Lewis Lung (LL/2) tumor clones led to significantly slower tumor growth and longer survival in mice compared to those injected with either CMV promoter driven IL-2 clones or the parental tumor cells. Our results demonstrated that the transcriptional amplifier-based expression cassettes could be very useful in applications where high levels of gene expression are difficult to achieve.
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Affiliation(s)
- P Luo
- Gene Therapy Group, Department of Microbiology and Immunology, University of Arizona, Tucson, 85724, USA.
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Del Campo Rodríguez S, Gutiérrez OC, Jaramillo M. [Noise. Acoustic pollution in emergency rooms]. Rev Enferm 2005; 28:20-4. [PMID: 15816218] [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: 05/02/2023]
Abstract
In our current society, it is essential to consider acoustic contamination as a type of aggression which has a direct effect on the health and well-being of individuals. Therefore, it is necessary to establish a series of facts which will enable us to clarify the importance of the aforementioned problem.
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Affiliation(s)
- S Del Campo Rodríguez
- Servicio de Urgencias, Hospital Universitario de Bellvitge, Hospitalet de Llobregat, Barcelona
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Jaramillo M, Ilvonen T, Kujala T, Alku P, Tervaniemi M, Alho K. Are different kinds of acoustic features processed differently for speech and non-speech sounds? Brain Res Cogn Brain Res 2001; 12:459-66. [PMID: 11689306 DOI: 10.1016/s0926-6410(01)00081-7] [Citation(s) in RCA: 35] [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] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
This study examined how changes in different types of acoustic features are processed in the brain for both speech and non-speech sounds. Event-related potentials (ERPs) were recorded in native Finnish speakers presented with sequences of repetitive vowels (/e/) or complex harmonical tones interspersed with infrequent changes in duration, frequency and either a vowel change (/o/ for vowel sequences) or a double deviant (frequency+duration change for tone sequences). The stimuli were presented monaurally in separate blocks to either the left or right ear. The results showed that speech stimuli were more efficiently processed than harmonical tones as reflected by an enhanced mismatch negativity (MMN) and P3a ERP components. In addition, the duration change in vowels elicited a larger MMN component than the equivalent change in tones. This result might reflect enhanced processing of duration features in the Finnish language in which phoneme duration plays a critical role.
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Affiliation(s)
- M Jaramillo
- Cognitive Brain Research Unit, Department of Psychology, University of Helsinki, PO Box 13, FIN-00014, Helsinki, Finland
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Abstract
This is a case report of a patient with bilateral cholesterol granuloma of the petrous apex, who presented with unilateral symptoms. Initially suspected as having a dermoid cyst, he underwent posterior fossa exploration, drainage and biopsy. Symptoms recurred one year later and subcochlear drainage of the petrous apex cyst was successfully performed. Follow-up for over 18 months shows no clinical nor imaging signs of recurrence. A MEDLINE literature search was carried out and relevant paper publications reviewed. Case presentation including initial, pre- and post-operative imaging is presented. This is followed by discussion of current concepts on the presentation and management of large cholesterol cysts of the petrous apex.
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Affiliation(s)
- M Jaramillo
- Department of Otolaryngology, Head and Neck Surgery, Derriford Hospital, Plymouth, UK.
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Abstract
This report presents a case of eosinophilic angiocentric fibrosis in a man with Wegener's granulomatosis, the first report of a possible association between the two conditions. This association suggests a possible mechanism for its pathogenesis.
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Affiliation(s)
- J Loane
- Department of Pathology, Aberdeen Royal Infirmary, Foresterhill, Aberdeen AB25 2ZD, UK.
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Paavilainen P, Simola J, Jaramillo M, Näätänen R, Winkler I. Preattentive extraction of abstract feature conjunctions from auditory stimulation as reflected by the mismatch negativity (MMN). Psychophysiology 2001; 38:359-65. [PMID: 11347880] [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: 04/16/2023]
Abstract
Brain mechanisms extracting invariant information from varying auditory inputs were studied using the mismatch-negativity (MMN) brain response. We wished to determine whether the preattentive sound-analysis mechanisms, reflected by MMN, are capable of extracting invariant relationships based on abstract conjunctions between two sound features. The standard stimuli varied over a large range in frequency and intensity dimensions following the rule that the higher the frequency, the louder the intensity. The occasional deviant stimuli violated this frequency-intensity relationship and elicited an MMN. The results demonstrate that preattentive processing of auditory stimuli extends to unexpectedly complex relationships between the stimulus features.
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Affiliation(s)
- P Paavilainen
- Department of Psychology, University of Helsinki, Finland.
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Fernández AP, Jaramillo J, Jaramillo M. Comparison of Photorefractive Keratectomy and Laser in situ Keratomileusis for Myopia of -6 D or Less Using the Nidek EC-5000 Laser. J Refract Surg 2000; 16:711-5. [PMID: 11110311 DOI: 10.3928/1081-597x-20001101-06] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
PURPOSE We compared the efficacy, predictability, and safety of photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK) for the surgical correction of low and moderate myopia. METHODS A retrospective study was performed to evaluate uncorrected and spectacle-corrected visual acuity, and manifest refraction 1 year after PRK or LASIK. All procedures were done using an automatic microkeratome (Chiron Ophthalmic) and the Nidek EC-5000 excimer laser. RESULTS PRK was performed in 75 eyes of 45 patients and LASIK in 133 eyes of 77 patients. Mean age for PRK patients was 32.8 years (range, 18 to 52 yr) and LASIK patients was 29.6 years (range, 18 to 49 yr). Mean preoperative spherical equivalent refraction for PRK patients was -3.28 D (range, -1.00 to -6.00 D) and LASIK, -3.86 D (range, -1.00 to -6.00 D). One year after surgery, mean spherical equivalent refraction for Group 1 (baseline, -1.00 to -3.00 D) PRK eyes was -0.18 +/- 0.61 D (range, -1.50 to +0.75 D) and for LASIK eyes, -0.08 +/- 0.61 D (range, -1.50 to +1.62 D), with no statistically significant difference. For Group 2 eyes (baseline, -3.25 to -6.00 D), mean spherical equivalent refraction for PRK eyes was -0.44 +/- 0.87 D (range, -2.00 to +2.12 D) and for LASIK eyes, -0.09 +/- 0.83 D (range, -1.50 to +1.75 D), with no statistically significant difference. The antilogarithm of the mean UCVA (antilogUCVA) in Group 1 for PRK was 0.79 +/- 0.21 (20/25) and for LASIK was 0.87 +/- 0.19 (20/23), with no statistically significant difference. The antilogUCVA in Group 2 for PRK eyes was 0.70 +/- 0.24 (20/28) and for LASIK eyes was 0.83 +/- 0.18 (20/24), with a statistically significant difference (0.7 vs. 0.83, P < .005). The percentage of eyes with a postoperative UCVA >20/40 in Group 1 for PRK was 91.5% (38 eyes) and for LASIK was 95% (50 eyes) (no statistically significant difference), and in Group 2 for PRK eyes, it was 82% (27 eyes) and 97.5% (78 eyes) for LASIK (statistically significant difference, P < .05). CONCLUSION PRK and LASIK with the Nidek EC-5000 excimer laser are effective and safe for correcting low to moderate myopia, but LASIK eyes showed better results for moderate myopia in terms of uncorrected visual acuity.
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Abstract
A symptomatic case of tongue base varices in a patient with portal hypertension secondary to liver cirrhosis is presented. There are no previously documented cases in the world literature. Oesophageal varices may not be the only source of expectorated blood in a patient with portal hypertension.
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Affiliation(s)
- P Jassar
- Department of Otolaryngology, Aberdeen Royal Infirmary, UK
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Jaramillo M, Paavilainen P, Näätänen R. Mismatch negativity and behavioural discrimination in humans as a function of the magnitude of change in sound duration. Neurosci Lett 2000; 290:101-4. [PMID: 10936687 DOI: 10.1016/s0304-3940(00)01344-6] [Citation(s) in RCA: 70] [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: 11/26/2022]
Abstract
This study investigated how duration changes are processed in the human brain as indexed by the mismatch negativity (MMN), a component of the auditory event-related potential (ERP) reflecting sensory memory. Subjects were presented with sequences of repetitive 100-ms white noise bursts interspersed by occasional duration deviants which were 1, 10, or 50 ms (decrements) or 110, 150, or 200 ms (increments) in duration. In a separate task, subjects were asked to detect deviants within the sequence via a button-press. MMN was elicited by both stimulus decrements and increments and increased in amplitude as a function of the amount of deviation from the standard duration except for the shortest, 1-ms deviant. Behavioural detection paralleled the MMN responses, suggesting a link between the processes underlying MMN and behavioural measures.
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Affiliation(s)
- M Jaramillo
- Cognitive Brain Research Unit, Department of Psychology, University of Helsinki, Finland, PO Box 13, FIN-00014, Helsinki, Finland.
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Abstract
For nearly 100 years, pathologists have utilized "special histochemical stains" to assist in tissue-based diagnosis. As illustrated in Figures 1 and 2, histochemical stains have been used to identify infectious microorganisms (e.g., Mycobacterium tuberculosis with acid-fast bacillus (AFB) stain), to detail inflammatory stromal or structural alterations (e.g., fibrosis in liver cirrhosis with Masson trichrome), to identify microanatomic sites of disease (e.g., basement membrane in glomerulonephritis with Jones methenamine silver), to identify abnormal chemical deposits (e.g., iron in hemochromatosis with Prussian blue stain), or abnormal immune deposits (e.g., amyloid via Congo red stain). The current surgical pathology laboratory may employ a repertoire of 20 to 25 "special stains" to ensure the full diagnostic complement. While the diagnostic repertoire and the biochemical recipes for the stains are now a well-established, codified part of surgical pathology, there is an ever-moving, leading edge of new developments including new reagents, applications, and methods. This review seeks to update the reader on some of the new applications including both new reagents and methods. Particular emphasis will be placed on the recent technologic advance of automating special stains in kinetic-mode (1-4). The authors consider in turn: 1. In brief, the "news" (recent literature review) of new staining applications; 2. In greater detail, two new applications for detection of Microsporidia and Helicobacer pylori; 3. The new technologic advancement of kinetic mode automation of special stains.
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Affiliation(s)
- T Grogan
- Department of Pathology, University of Arizona, Tucson 85724, USA
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Winograd E, Clavijo CA, Bustamante LY, Jaramillo M. Release of merozoites from Plasmodium falciparum-infected erythrocytes could be mediated by a non-explosive event. Parasitol Res 1999; 85:621-4. [PMID: 10431724 DOI: 10.1007/s004360050606] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Little is known about the molecular mechanism underlying the release of merozoites from malaria-infected erythrocytes. In the present study, video microscopy was carried out, and images throughout the process of merozoite release from Plasmodium falciparum-infected erythrocytes were digitized and analyzed. Merozoites were shown to escape from the infected host cell in about 1 s through a single site of the infected erythrocyte membrane, whose dimension was estimated to be 2.5 microm. Merozoites were released together with the residual body containing hemozoin, leaving behind a membranous structure that persisted even after an extended period of observation. Densitometric measurements showed that the cytoplasmic content of the infected erythrocyte did not diffuse out as parasites were released, but was gradually lost thereafter. This would indicate that the release of merozoites from infected erythrocytes is not mediated by an explosive event.
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Affiliation(s)
- E Winograd
- Laboratorio de Biologia Celullar, Instituto Nacional de Salud, Bogota, Colombia.
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35
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Abstract
The ability to extract invariant relationships from physically varying stimulation is critical for example to categorical perception of complex auditory information such as speech and music. Human subjects were presented with tone pairs randomly varying over a wide frequency range, there being no physically constant tone pair at all. Instead, the invariant feature was either the direction of the tone pairs (ascending: the second tone was higher in frequency than the first tone) or the frequency ratio (musical interval) of the two tones. The subjects ignored the tone pairs, and instead attended a silent video. Occasional deviant pairs (either descending in direction or having a different frequency ratio) elicited the mismatch negativity (MMN) of the event-related potential, demonstrating the existence of neuronal populations which automatically (independently of attention) extract invariant relationships from acoustical variance.
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Affiliation(s)
- P Paavilainen
- Department of Psychology, University of Helsinki, Finland.
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36
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Jaramillo M, Ruiz H, Silva L. [Comparative evaluation of triamcinolone in coccidiosis control in fattening chickens]. Acta Cient Venez 1999; 49:62-7. [PMID: 10205918] [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: 02/11/2023]
Abstract
The effectiveness of Triancinolone as a protector against coccidiosis in broilers was tested in a random design experiment. Cobb x Cobb one-day old chicken were assigned to the treatments: T1: no medication-no inoculation; T2: no medication-inoculation; T3: Triancinolone-inoculation; T4: Sodic Monensin-inoculation; and T5: Sodic Salinomycin-inoculation. The inoculation was accomplished with 10,000 oocysts of Eimeria tenella and 40,000 of intestinal Eimerias. The results of the intestinal damage degree showed that T3 (60.6%) and T4 (63.6%) were better to control coccidias in relation to T5 (96.9%) and T2 (100%). The oocysts number in feces (number/g) showed the best effectiveness for T3 (4,300) comparing with T4 (126,900), T5 (98,100), and T2 (382,000). These results emphasize the effective action mechanism of Triancinolone to interfere with the biological cycle of coccidias. The feed conversion was better (P < 0.05) in the groups that received the drugs (T3, T4, and T5) comparing with T2. This fact showed the adverse effect that coccidiosis cause on the broiler performance behavior. Triancinolone showed the best action effectiveness on the control of coccidiosis.
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Affiliation(s)
- M Jaramillo
- Instituto de Investigaciones Zootécnicas, CENIAP-FONAIAP, Venezuela
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37
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Abstract
Neural representations for abstract features of auditory stimuli were studied by presenting reading subjects with stimulus blocks composed of pairs of two closely spaced tones. There were frequent ascending standard pairs (i.e., the second tone was higher in frequency than the first tone) and occasional descending deviant pairs. Both types of pairs varied randomly over a wide frequency range. In separate blocks, the tones forming a pair were presented either to the same ear or to opposite ears. The deviant pairs elicited the mismatch negativity (MMN) in all conditions, which indicates that the brain can automatically extract and represent an abstract invariant feature (rise or fall) of stimulation above the point of binaural convergence and detect violations against it. Poor behavioral performance in an active discrimination task suggested that conscious discrimination processes can only partially use the outcome of the preattentive discrimination processes reflected by the MMN.
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Affiliation(s)
- P Paavilainen
- Department of Psychology, University of Helsinki, Finland
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Abstract
The temporal constraints of auditory event synthesis were investigated using event-related potentials. Standard stimuli consisted of an initial constant-frequency segment followed by a frequency glide. Occasionally, stimuli deviating from this standard both in intensity and within the direction of the glide were presented in the otherwise repetitive sound sequence. Previous results suggested that such 'double' deviants elicit only a single mismatch negativity (MMN) if the two temporally separate deviant elements were integrated within a common unit. Two successive MMNs were elicited by double deviants when the initial constant-frequency segment of the sound was 250 ms long, but only one when this segment was 150 ms in duration. The results support the hypothesis that the auditory input is processed in approximately 200 ms long temporal integration windows.
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Affiliation(s)
- I Winkler
- Institute for Psychology, Hungarian Academy of Sciences, Budapest
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Djerić DR, Schachern PA, Paparella MM, Jaramillo M, Haruna S, Bassioni M. Otitis media (silent): a potential cause of childhood meningitis. Laryngoscope 1994; 104:1453-60. [PMID: 7990633 DOI: 10.1288/00005537-7990632] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Sixteen temporal bones from 8 infants with otitis media, who died of meningitis, and 6 controls from infants with only otitis media, were studied histologically. All bones contained middle ear effusion and residual mesenchyme, but, unlike the controls, the meningitic cases showed considerable histopathological tissue changes of chronic and acute otitis media and chronic inflammatory cells in the round window membrane and within the perilymph, the modiolus, and the cochlear aqueduct, suggesting the latter as likely portals from the inner ear to the meninges. Since all tympanic membranes were intact and 3 were histologically normal, this silent route of infection warrants medical vigilance.
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Affiliation(s)
- D R Djerić
- Otopathology Laboratory, Otitis Media Research Center, University of Minnesota
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Jaramillo M, Dever TE, Merrick WC, Sonenberg N. RNA unwinding in translation: assembly of helicase complex intermediates comprising eukaryotic initiation factors eIF-4F and eIF-4B. Mol Cell Biol 1991; 11:5992-7. [PMID: 1719376 PMCID: PMC361763 DOI: 10.1128/mcb.11.12.5992-5997.1991] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.2] [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: 12/28/2022] Open
Abstract
Ribosome binding to mRNA requires the concerted action of three initiation factors, eIF-4A, eIF-4B, and eIF-4F, and the hydrolysis of ATP in a mechanism that is not well understood. Several lines of evidence support a model by which these factors bind to the 5' end of mRNA and unwind proximal secondary structure, thus allowing 40S ribosomal subunits to bind. We have previously used an unwinding assay to demonstrate that eIF-4A or eIF-4F in combination with eIF-4B functions as an RNA helicase. To elucidate the molecular mechanism of RNA unwinding, we used a mobility shift electrophoresis assay which allows the simultaneous analysis of unwinding and complex formation between these factors and RNA. eIF-4F forms a stable complex (complex A) with duplex RNA in the absence of ATP. Addition of eIF-4B results in the formation of a second complex (complex B) of slower mobility in the gel. In the presence of ATP, both complexes dissociate, concomitant with the unwinding of the duplex RNA. We present evidence to suggest that unwinding occurs in a processive as opposed to distributive manner. Thus, we conclude that helicase complexes that are formed in the absence of ATP on duplex RNA translocate processively along the RNA in an ATP-dependent reaction and melt secondary structure. These helicase complexes therefore represent intermediates in the unwinding process of mRNA that could precede ribosome binding.
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Affiliation(s)
- M Jaramillo
- Department of Biochemistry, McGill University, Montreal, Quebec, Canada
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Jaramillo M, Pelletier J, Edery I, Nielsen PJ, Sonenberg N. Multiple mRNAs encode the murine translation initiation factor eIF-4E. J Biol Chem 1991; 266:10446-51. [PMID: 2037592] [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: 12/29/2022] Open
Abstract
All eukaryotic cellular mRNAs (except organellar) possess at their 5' end the structure m7GpppX (where X is any nucleotide) termed the "cap." The cap structure facilitates the melting of mRNA 5' secondary structure through the action of initiation factor-4F (eIF-4F) in conjunction with eIF-4B. eIF-4F consists of three subunits of which one, eIF-4E (eIF-4E has recently been designated eIF-4 alpha according to the Nomenclature Committee of the International Union of Biochemistry (NC-IUB) (Safer, B. (1989) Eur. J. Biochem. 186, 1-3)), contains the cap binding site. Several lines of evidence suggest that eIF-4E regulates the rate of translation initiation. Consequently, changes in cellular eIF-4E levels could control growth and differentiation. To investigate the possibility that eIF-4E expression is regulated, we studied the pattern of eIF-4E expression in several cell lines. Here, we show the existence of multiple mRNAs for eIF-4E that are generated by differential polyadenylation. In addition, we show tissue-specific differences in eIF-4E mRNA expression and utilization of polyadenylation sites.
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Affiliation(s)
- M Jaramillo
- Department of Biochemistry, McGill University, Montreal, Federal Republic of Germany
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Smith MR, Jaramillo M, Tuazon PT, Traugh JA, Liu YL, Sonenberg N, Kung HF. Modulation of the mitogenic activity of eukaryotic translation initiation factor-4E by protein kinase C. New Biol 1991; 3:601-7. [PMID: 1911648] [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] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Eukaryotic initiation factor-4E (eIF-4E) binds to the cap structure of eukaryotic mRNAs and is a component of the cap-binding protein complex eIF-4F. eIF-4E is present in cells in limiting concentrations and is phosphorylated both in vivo and in vitro by protein kinase C (PKC). Recently, eIF-4E has been implicated as an intracellular transducer of extracellular growth signals; microinjection of recombinant eIF-4E into quiescent NIH 3T3 cells induced DNA synthesis. In the present report, the mitogenic activity of eIF-4E was examined after coinjection with PKC. Recombinant eIF-4E was phosphorylated by PKC at the same amino acid that is phosphorylated in cultured cells and reticulocytes in response to phorbol ester. At limiting concentrations of eIF-4E, coinjection with PKC induced a fivefold increase in the mitogenic activity of eIF-4E. Injection of PKC alone or coinjection of eIF-4E with cAMP-dependent protein kinase (PKA) or the Raf protein had no effect. These results suggest that the mitogenic activity of eIF-4E is enhanced by PKC-specific phosphorylation and that phosphate addition is a rate-limiting step in eIF-4E activity.
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Affiliation(s)
- M R Smith
- Biological Carcinogenesis and Development Program, National Cancer Institute, Frederick Cancer Research and Development Center, MD 21702-1201
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Jaramillo M, Browning K, Dever TE, Blum S, Trachsel H, Merrick WC, Ravel JM, Sonenberg N. Translation initiation factors that function as RNA helicases from mammals, plants and yeast. Biochim Biophys Acta 1990; 1050:134-9. [PMID: 2169888 DOI: 10.1016/0167-4781(90)90154-t] [Citation(s) in RCA: 33] [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] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Ribosome binding to eukaryotic mRNAs requires the concerted action of three eukaryotic initiation factors: eIF-4A, eIF-4B and eIF-4F as well as the hydrolysis of ATP. These initiation factors are implicated in the unwinding of mRNA 5' secondary structure and have been isolated from mammals, yeast and wheat germ. We used an RNA unwinding assay to compare the activities of these factors from the different species. We also measured the inter-species interchangeability of these factors in the unwinding reaction. In mammals, it has been previously shown that a combination of rabbit reticulocyte eIF-4F and -4B or eIF-4A and -4B were active in the RNA unwinding assay. In wheat germ, the combination of eIF-4A and eIF-4F resulted in RNA unwinding in a reaction that was stimulated by eIF-4B. Mammalian eIF-4A was able to substitute in this system. We also show that yeast eIF-4A is able to effectively substitute for mammalian eIF-4A in duplex RNA unwinding in combination with mammalian eIF-4B, while wheat-germ eIF-4A was only partially able to substitute. Taken together, these results suggest that initiation factor requirements for RNA unwinding are largely similar in mammals, yeast and plants.
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Affiliation(s)
- M Jaramillo
- Department of Biochemistry, McGill University, Montreal, Canada
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Smith MR, Jaramillo M, Liu YL, Dever TE, Merrick WC, Kung HF, Sonenberg N. Translation initiation factors induce DNA synthesis and transform NIH 3T3 cells. New Biol 1990; 2:648-54. [PMID: 2083255] [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] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Several polypeptide factors that are essential for the initiation of protein synthesis bind to eukaryotic mRNAs and facilitate the formation of ribosome initiation complexes. Purified mRNA-binding translation initiation factors were microinjected into quiescent NIH 3T3 cells to study the possible growth-promoting role of these factors in living cells. We report that recombinant eIF-4E and rabbit reticulocyte eIF-4F induce a dose-dependent increase of DNA synthesis and morphologically transform NIH 3T3 cells. These results suggest that polypeptides involved in activating the rate-limiting step of protein synthesis (initiation complex formation) can be mitogenic and oncogenic when overexpressed in a cell by direct injection. Thus, eIF-4E and eIF-4F represent a class of proto-oncogenic proteins that is cytoplasmic, is involved in protein synthesis initiation, and is distinct from the proto-oncogenes that have been identified previously.
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Affiliation(s)
- M R Smith
- Biological Carcinogenesis and Development Program, National Cancer Institute, Frederick Cancer Research Facility, MD 21701
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Jaramillo M, de Zafra RL, Barrett J, Emmons LK, Solomon PM, Parrish A. Measurements of stratospheric hydrogen cyanide at McMurdo Station, Antarctica: Further evidence of winter stratospheric subsidence? ACTA ACUST UNITED AC 1989. [DOI: 10.1029/jd094id14p16773] [Citation(s) in RCA: 14] [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] [Indexed: 11/09/2022]
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de Zafra RL, Jaramillo M, Barrett J, Emmons LK, Solomon PM, Parrish A. New observations of a large concentration of ClO in the springtime lower stratosphere over Antarctica and its implications for ozone-depleting chemistry. ACTA ACUST UNITED AC 1989. [DOI: 10.1029/jd094id09p11423] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Barrett JW, Solomon PM, de Zafra RL, Jaramillo M, Emmons L, Parrish A. Formation of the Antarctic ozone hole by the CIO dimer mechanism. Nature 1988. [DOI: 10.1038/336455a0] [Citation(s) in RCA: 77] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Abstract
We have used a retroviral vector carrying the adenovirus E1A oncogene and the neomycin phosphotransferase gene to establish a human thyroid-derived cell line that exhibits TSH-mediated cAMP generation as well as the differential expression of HLA class II antigens in response to recombinant gamma-interferon. Twenty-two-week gestation, histologically confirmed, human fetal thyroid was collagenase digested, cultured as a monolayer, and infected directly with 12S or 13S E1A-containing retrovirus constructs. Infected clones (n = 30) were selected in a hormone-supplemented medium containing bovine TSH (bTSH; 1 mU/ml), 10% fetal bovine serum, and 0.5 mg/ml G418 antibiotic. A rapidly growing clone (designated 12S) was chosen for detailed analysis over 18 months of continuous culture. The 12S clone was sensitive to less than 10 microU/ml bTSH when assessed by extracellular accumulation of cAMP, but TSH had no influence on 72-h incorporation of [3H]thymidine. Clone 12S responded to recombinant human gamma-interferon (1-10(4) U/ml) by induction of HLA DR alpha-chain-specific mRNA and the surface expression of HLA-DR antigen detected by fluorescein isothiocyanate-labeled monoclonal antibody to nonpolymorphic HLA-DR regions using flow cytometry. These studies indicate the potential for immortalizing human thyroid cells for use as targets of anti-TSH receptor immune responses and for long term studies of human throcyte HLA gene regulation.
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Affiliation(s)
- R D Cone
- Department of Medicine, Mount Sinai School of Medicine, New York, New York 10029
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Parrish A, de Zafra RL, Jaramillo M, Connor B, Solomon PM, Barrett JW. Extremely low N2O concentrations in the springtime stratosphere at McMurdo Station, Antarctica. Nature 1988. [DOI: 10.1038/332053a0] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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50
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Solomon PM, Connor B, de Zafra RL, Parrish A, Barrett J, Jaramillo M. High concentrations of chlorine monoxide at low altitudes in the Antarctic spring stratosphere: secular variation. Nature 1987. [DOI: 10.1038/328411a0] [Citation(s) in RCA: 80] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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