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Lozano J, Fernandez F, Gomez J. Preparation of alpha-spectrometric sources by co-precipitation with Fe(OH)3: application to uranium. Appl Radiat Isot 1999. [DOI: 10.1016/s0969-8043(98)00100-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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202
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Gil S, Marco SF, Arenas J, Irurzun J, Agullo T, Alonso S, Fernandez F. Doppler duplex color localization of osteoid osteomas. Skeletal Radiol 1999; 28:107-10. [PMID: 10197458 DOI: 10.1007/s002560050484] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
We present two cases of osteoid osteoma in adolescent boys. The lesions were located in the proximal metaphysis of the right tibia and left femoral diaphysis respectively. Doppler duplex color study demonstrated clearly the highly vascular nidus and its feeding artery in one case and only the feeding artery in the second. We believe these are the first descriptions of osteoid osteomas assessed with Doppler duplex color, which was also used as guidance for the percutaneous localization and biopsy.
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203
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Taviaux S, Brunel V, Dupont M, Fernandez F, Ferraz C, Carbuccia N, Sainty D, Demaille J, Birg F, Lafage-Pochitaloff M. Simple variant t(8;21) acute myeloid leukemias harbor insertions of the AML1 or ETO genes. Genes Chromosomes Cancer 1999; 24:165-71. [PMID: 9885986 DOI: 10.1002/(sici)1098-2264(199902)24:2<165::aid-gcc12>3.0.co;2-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
We report on the molecular characterization of two acute myeloid leukemias (AML), one AML-M1 (patient 1) and one AML-M2 (patient 2) with t(8;21)(p21;q22) and t(8;20)(q22;p13), respectively, at diagnosis. The locations of the breakpoints, 21q22 in patient 1 and 8q22 in patient 2, prompted us to search for a cryptic t(8;21)(q22;q22) and involvement of the AML1 and ETO genes. Dual-color fluorescence in situ hybridization (FISH) using whole chromosome painting probes for chromosomes 8, 20, and 21 confirmed the conventional cytogenetic karyotypes. However, dual-color FISH using appropriate ETO and AML1 probes disclosed an insertion of AML1 into 8q22 on the derivative chromosome 8 in patient 1 and of ETO into 21q22 on one chromosome 21 in patient 2, leading to AML1-ETO fusion signals. Both cases expressed an AML1-ETO transcript, shown by reverse transcriptase polymerase chain reaction and cDNA sequencing. Creation of functional AML1-ETO fusion genes in these two simple variant t(8;21) probably occurred through complex mechanisms, combining translocation and insertion of chromosomal segments.
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204
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Wohrer K, Chetioui A, Rozet JP, Jolly A, Fernandez F, Stephan C, Brendles B, Gayet R. Target nuclear charge dependence of 1s2to 1s2p and 1s2to 1s3p excitation cross sections of Fe24+projectiles in the intermediate velocity range. ACTA ACUST UNITED AC 1999. [DOI: 10.1088/0022-3700/19/13/011] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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205
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Domingo C, Font J, Baixeras C, Font LL, Fernandez F. Contribution of cosmic ray heavy ions to the radiation hazard in manned space flights. RADIATION PROTECTION DOSIMETRY 1999; 85:295-299. [PMID: 11542231 DOI: 10.1093/oxfordjournals.rpd.a032855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Primary cosmic radiation arriving near the Earth may be classified into two general categories: the gamma component and the hadronic component. The hadronic component contains mainly protons, a small amount of alpha particles and a smaller amount of heavier charged nuclei (ions). Although the fluxes of these heavier ions are very small in comparison to those of protons, they are able to originate a huge linear energy transfer (LET). This work studies the contribution of heavy ions from cosmic rays to the radiation hazard to which the crew of a manned long duration space flight might be exposed. The geometry of the energy deposition by a heavy ion is studied, and it is found that energies of the order of up to 10(23) J kg-1 are deposited.
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206
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Morales-Angulo C, Val-Bernal F, Buelta L, Fernandez F, García-Castrillo L, Rama J. Prognostic factors in supraglottic laryngeal carcinoma. Otolaryngol Head Neck Surg 1998; 119:548-53. [PMID: 9807091 DOI: 10.1016/s0194-5998(98)70123-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We carried out a retrospective study of patients with supraglottic carcinomas who were treated surgically at the Marques de Valdecilla Hospital (Santander, Spain) between 1978 and 1987 and who were followed up for at least 5 years. The Kaplan-Meier survival curves were calculated for 24 clinical, histologic, and morphometric parameters. Multivariate analysis was then performed by means of the Cox regression model. In the univariate analysis, survival was related to presence of capsule rupture of the involved lymph nodes (p = 0.00001), number of metastatic lymph nodes (p = 0.0002), postoperative TNM stage (p = 0.004), grade of cell differentiation (p = 0.001), presence of intratumoral necrosis (p = 0.01), and type of invasion (p = 0.04). The nuclear area did not have an influence on survival. Only the presence or absence of capsule rupture of the metastatic lymph nodes and the grade of cell differentiation were included in the final Cox model and proved to be parameters with independent prognostic significance.
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207
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Mozziconacci MJ, Liberatore C, Brunel V, Grignani F, Arnoulet C, Ferrucci PF, Fernandez F, Sainty D, Pelicci PG, Birg F, Lafage-Pochitaloff M. In vitro response to all-trans retinoic acid of acute promyelocytic leukemias with nonreciprocal PML/RARA or RARA/PML fusion genes. Genes Chromosomes Cancer 1998; 22:241-50. [PMID: 9624536 DOI: 10.1002/(sici)1098-2264(199807)22:3<241::aid-gcc10>3.0.co;2-r] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Acute promyelocytic leukemia (APL) is characterized by the t(15;17) cytogenetic abnormality leading to the expression of two fusion genes, PML/RARA and RARA/PML, and by its sensitivity to all-trans retinoic acid (ATRA) differentiating treatment. Rare APL cases lacking the t(15;17) have been described. We have previously reported two cases presenting with submicroscopic insertions of RARA or PML into chromosome 15 or 17, respectively. These insertions lead to the formation of potentially functional, nonreciprocal, PML/RARA or RARA/PML fusion genes, providing the unique opportunity to investigate in a human noncell-line model the respective role of PML/RARA or RARA/PML in retinoid signaling. Here, we report the in vitro response to ATRA of these two cases as well as of a third case presenting with submicroscopic insertion (15;17) and expressing exclusively PML/RARA, by morphological, functional, and immunological assays. The two cases expressing PML/RARA presented with an immunostaining pattern typical of APL and a positive response to ATRA, whereas the APL case expressing only a RARA/PML fusion transcript exhibited an immunostaining pattern typical of non-APL cells, and was resistant to ATRA. Our results confirm that sensitivity to ATRA requires expression of PML/RARA and strongly correlates with immunostaining, and demonstrate that expression of RARA/PML alone is sufficient for a cytological APL phenotype, but does not confer sensitivity to ATRA.
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MESH Headings
- Adult
- Cell Differentiation/drug effects
- Chromosomes, Human, Pair 15/genetics
- Chromosomes, Human, Pair 17/genetics
- Female
- Fluorescent Antibody Technique, Indirect
- Gene Conversion/drug effects
- Gene Conversion/genetics
- Genes, Neoplasm
- Humans
- Leukemia, Promyelocytic, Acute/genetics
- Leukemia, Promyelocytic, Acute/metabolism
- Leukemia, Promyelocytic, Acute/pathology
- Male
- Middle Aged
- Neoplasm Proteins/drug effects
- Neoplasm Proteins/genetics
- Neoplasm Proteins/metabolism
- Oncogene Proteins, Fusion/drug effects
- Oncogene Proteins, Fusion/genetics
- Oncogene Proteins, Fusion/metabolism
- Translocation, Genetic
- Tretinoin/pharmacology
- Tumor Cells, Cultured
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208
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Menendez JC, Casanova D, Amado JA, Salas E, García-Unzueta MT, Fernandez F, de la Lastra LP, Berrazueta JR. Effects of radiation on endothelial function. Int J Radiat Oncol Biol Phys 1998; 41:905-13. [PMID: 9652856 DOI: 10.1016/s0360-3016(98)00112-6] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
PURPOSE The response of endothelium to ionizing radiation was studied. METHODS AND MATERIALS The abdominal aorta in different experimental groups of rats was irradiated, and the response of arterial rings from the irradiated segments to norepinephrine, acetylcholine (ACh), and nitroglycerin (NTG) was studied. Nonirradiated thoracic segments in the same experimental animals were used as as a control for comparisons. Two age-matched nonirradiated control groups were also studied. RESULTS A poor endothelium-dependent vasodilator response was obtained with ACh in the irradiated rings and also in those not directly irradiated; the endothelium-independent vasodilator response to NTG was preserved during the first 3 days after irradiation. By 6 months, both the endothelium-dependent response and endothelium-independent response were impaired. CONCLUSIONS Alterations in nitric oxide synthesis and/or release by the endothelium were observed during the early phase of radiation in irradiated and nonirradiated segments. In the delayed phase of radiation, endothelium-independent muscular relaxation was also affected.
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209
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Barrandeguy M, Parreño V, Lagos Mármol M, Pont Lezica F, Rivas C, Valle C, Fernandez F. Prevention of rotavirus diarrhoea in foals by parenteral vaccination of the mares: field trial. DEVELOPMENTS IN BIOLOGICAL STANDARDIZATION 1998; 92:253-7. [PMID: 9580371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Many countries have reported rotavirus diarrhoea in foals. In Argentina it causes important economic losses to the horse industry. In this work we present the results obtained using an experimental vaccine in a farm with enzootic infection of rotavirus. A hundred mares were vaccinated 60 and 30 days before foaling with inactivated rotavirus SA11 (G3P2), H2 (G3P12), Lincoln (G6P1), with aluminum hydroxide as adjuvant; 65 mares were included in the unvaccinated, control group. To evaluate the vaccine, morbidity, duration of the diarrhoea and rotavirus shedding were recorded. Antibody levels were established in serum, colostrum and milk of the vaccinated mares, and also in serum from the foals. In foals from vaccinated mares the morbidity was 30%, clinical signs were observed during 1.8 days, and rotavirus shedding was not detected. In the control group the morbidity reached 80%, the clinical signs lasted 7.3 days and rotavirus shedding was detected in 80% of the diarrhoeic foals. At foaling the serum antibody levels were 15 times higher with a mean neutralizing titre (NT) of 3.5 logs than before vaccination (2.4 logs), in colostrum 5.00 logs, and in milk at 90 days post partum 1.7 logs. In foals from vaccinated mares the level of neutralizing antibodies was 3.8 logs at 48 days of age, going down to 2.2 logs at 90 days of age. Immunization of the pregnant mare would be a good method for preventing diarrhoea in foals.
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210
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Hartel M, Gaa J, Fernandez F, Storz LW. [Use of improved magnetic resonance tomography in vascular surgery with reference to efficiency and economy]. LANGENBECKS ARCHIV FUR CHIRURGIE. SUPPLEMENT. KONGRESSBAND. DEUTSCHE GESELLSCHAFT FUR CHIRURGIE. KONGRESS 1998; 114:437-9. [PMID: 9574175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The technique of Gadolinium-enhanced MR-angiography has become much better over the past year. The quality of the method is equal to conventional angiography. The advantages of MRA in comparison to conventional angiography today are: less strenuous for the patient, faster, CT or ERCP can be saved, MRA can be more economic.
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211
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Mozziconacci MJ, Sobol H, Costello R, Sainty D, Fernandez F, Birnbaum D, Lafage-Pochitaloff M. Askin tumor and acute myeloid leukemia in a patient with constitutional partial Y disomy. CANCER GENETICS AND CYTOGENETICS 1998; 103:11-4. [PMID: 9595038 DOI: 10.1016/s0165-4608(97)00354-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
We report the case of a young adult male carrying a constitutional unbalanced t(Y;13)(q11-12;p13) leading to a partial Y disomy, and presenting successively, in a 39-month interval, with an Askin tumor and a t(8;21) acute myeloid leukemia. The origin of the two neoplasias in this patient is discussed.
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212
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Bruno J, Fernandez F, Castells F, Grossmann I. A Rigorous MINLP Model for the Optimal Synthesis and Operation of Utility Plants. Chem Eng Res Des 1998. [DOI: 10.1205/026387698524901] [Citation(s) in RCA: 128] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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213
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Allen VM, Fernandez F, Hinton MH. Evaluation of the influence of supplementing the diet with mannose or palm kernel meal on Salmonella colonisation in poultry. Br Poult Sci 1997; 38:485-8. [PMID: 9510991 DOI: 10.1080/00071669708418026] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
1. The dietary inclusion of 15 and 25 g/kg mannose was associated with a reduction in the numbers of Salmonella enteritidis (PT4) in the caecal contents of chicks challenged by the food. The same benefit was not recorded for S. infantis, possibly because this strain, unlike S. enteritidis PT4, lacked mannose-sensitive fimbriae. 2. The addition of 25 g/kg palm kernel meal (PKM), but not 20 g/kg desiccated coconut, to the food reduced the degree of salmonella colonisation in the intestinal tract of broiler chicks given diets contaminated with S. kedougou or S. enteritidis from the day of their arrival from the hatchery. 3. The beneficial effect of PKM was also demonstrated at an inclusion rate of 5 g/kg and was similar for preparations with a particle size of either < 150 microns or < 300 microns. 4. Day-old birds challenged orally with S. enteritidis and given food supplemented with 25 g/kg PKM, became clear of infection by 3 weeks of age while birds given unsupplemented food remained infected. 5. These preliminary results suggest that the inclusion of PKM, which contains inter alia, oligosaccharides containing mannose, in the diet of chicks may reduce the extent to which the intestine is contaminated with salmonellas.
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214
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Sharma R, Fernandez F, Hinton M, Schumacher U. The influence of diet on the mucin carbohydrates in the chick intestinal tract. Cell Mol Life Sci 1997; 53:935-42. [PMID: 9447246 PMCID: PMC11147344 DOI: 10.1007/s000180050114] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The presence of nutrients in the intestinal lumen is a major factor influencing bacterial colonization in poultry. This study was conducted to investigate the effects of poultry feed on viscosity of intestinal contents and on mucin carbohydrates by comparing jejunal supernatants and the histochemical composition of goblet cells in chicks reared to 5 weeks of age on either a conventional maize-based diet or a wheat-based diet or a wheat diet supplemented with 0.1% xylanase. Regional differences in the distribution of the neutral, carboxylated and sulphated mucins were demonstrated using conventional histochemical techniques, while a panel of lectins was used to study alterations in glycoconjugate synthesis of mucins in chicks fed different diets. 1) Feeding a diet supplemented with xylanase lowered the viscosity but increased the amount of neutral, carboxylated and sulphated mucins in the jejunum. 2) In chicks fed a maize-based diet, neutral mucins increased in the surface and upper crypt goblet cells of the small and large intestines but decreased in the caecum. 3) Feeding a diet supplemented with xylanase modified crypt-surface glycosylation of N-acetylglucosamine residues and resulted in loss of sialic acid residues in the small and large intestines. These results indicate that the constituents of poultry feed, in particular the consumption of a diet supplemented with xylanase, lead to changes in intestinal viscosity and mucin composition which are associated with alterations in the goblet cell glycoconjugates of the chick intestinal tract.
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215
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Abstract
BACKGROUND Infection due to human immunodeficiency virus (HIV) has become a chronic disease of childhood, with increasing rates among adolescents and longer survival of those infected. This illness and its victims present a continuing challenge to the medical community. METHODS We used computerized literature searches (MEDLINE and AIDSline) to identify research and review papers from medical, psychiatric, and psychology journals; we obtained statistics directly from the Centers for Disease Control and Prevention, National AIDS Clearinghouse. RESULTS This overview of the topic includes epidemiology, transmission, diagnosis, psychiatric and neuropsychiatric manifestations, intervention, and the impact on families, caretakers, and health care workers. CONCLUSIONS To psychiatrists, this disease presents the epitome of the biopsychosocial model, encompassing the biology of a viral disease with psychiatric manifestations, complicated by the societal place in which it has become entrenched.
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216
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Andreu A, Stapleton AE, Fennell C, Lockman HA, Xercavins M, Fernandez F, Stamm WE. Urovirulence determinants in Escherichia coli strains causing prostatitis. J Infect Dis 1997; 176:464-9. [PMID: 9237713 DOI: 10.1086/514065] [Citation(s) in RCA: 71] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
To define the urovirulence properties of Escherichia coli strains producing prostatitis, E. coli strains isolated from men with acute (7 strains) or chronic (23) prostatitis were compared with E. coli isolates from women with pyelonephritis (30), acute cystitis (60), or complicated urinary tract infection (UTI; 30). Strains from prostatitis patients were significantly more likely to express hemolysin than were strains causing complicated UTI (73% vs. 43%; P = .02) and more often demonstrated hybridization with the cytotoxic necrotizing factor-1 (CNF-1) probe (63%) than did strains from women (44%-48%). P fimbrial expression was highest among pyelonephritis (73%) and prostatitis strains (53%) and lowest among E. coli from women with complicated UTI (23%) and cystitis (30%; P < .05, prostatitis strains vs. either of the latter 2 groups). Results suggest that E. coli strains producing prostatitis generally possess urovirulence profiles similar to those of strains from women with acute uncomplicated pyelonephritis and that hemolysin and CNF-1 are especially prevalent in prostatitis strains.
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217
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Fernandez M, de la Fuente H, Izquierdo M, Enguidanos A, Ramos C, Sanz R, Ibarrez M, Fernandez F. R-161. Diagnosis of major chromosome aneuploidies in abnormally fertilized human embryos. Hum Reprod 1997. [DOI: 10.1093/humrep/12.suppl_2.305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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218
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Garcia-Valtuille A, Mayorga M, Fernandez F. Myoepithelioma of the submandibular gland occuring after cardiac transplantation. Ann Saudi Med 1997; 17:381-2. [PMID: 17369749 DOI: 10.5144/0256-4947.1997.381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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219
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Lozano J, Fernandez F, Gomez J. Preparation of Alpha-spectrometric sources by coprecipitation with Fe(OH)3: Application to actinides. Appl Radiat Isot 1997. [DOI: 10.1016/s0969-8043(96)00227-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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220
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Adloff J, Brandt R, Butsev V, Debeauvais M, Fernandez F, Kulakov B, Krivopustov M, Ochs M, Sosnin A, Zamani M. High flux neutron production from 12C beams on heavy targets. RADIAT MEAS 1997. [DOI: 10.1016/s1350-4487(97)00090-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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221
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Mendoza A, Fernandez F, Mutimer DJ. Liver transplantation for fulminant hepatic failure: importance of renal failure. Transpl Int 1997. [DOI: 10.1111/j.1432-2277.1997.tb00537.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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222
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Domingo C, Font J, Baixeras C, Fernandez F. Source abundances of ultra heavy elements derived from UHCRE measurements. RADIAT MEAS 1996; 26:825-32. [PMID: 11540515 DOI: 10.1016/s1350-4487(96)00090-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A total of 205 tracks have been located, measured, and positively identified as originating from Ultra Heavy (Z > or = 65) cosmic ray ions with energies over 2 GeV/amu in the 10 UHCRE plastic track detector (mainly Lexan polycarbonate) stacks studied by our Group. About 40 values of reduced etch rate S have been obtained along each of these tracks. A method based on determining the gradient of S, together with calibration in accelerators, is used to determine the charge of each ion resulting in one of such tracks to obtain the charge spectrum of the recorded Ultra Heavy ions. The abundance ratio of ions with 87 < or = Z < or = 100 to those with 74 < or = Z < or = 86 as well as that of ions with 81 < or = Z < or = 86 to those with 74 < or = Z < or = 80 are calculated at 0.016 and 0.32, respectively, which agree with the values obtained from measurements in the HEAO-3 and Ariel-6 experiments. The abundance ratio of ions with 70 < or = Z < or = 73 to those with 74 < or = Z < or = 86 is also calculated, but its value (0.074) did not seem to be significant because of our detectors' low registration efficiency in the charge range 70 < or = Z < or = 73. A computer program developed by our Group, based on the Leaky Box cosmic ray propagation model, has been used to determine the source abundances of cosmic ray nuclei with Z > or = 65 inferred from the abundances measured in the UHCRE. It appeared that r-process synthesized elements were overabundant compared to the Solar System abundances, as predicted by other authors.
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223
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Matanza-Rodriguez MI, Alvarez-Cañas MC, Gomez-Ortega JM, Fernandez F, Blanco C, Garijo F, Val-Bernal JF. Hibernoma: A new case in the submandibular region. Ann Saudi Med 1996; 16:670-3. [PMID: 17429260 DOI: 10.5144/0256-4947.1996.670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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224
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Fernandez F, Jannatipour M, Hellman U, Rokeach LA, Parodi AJ. A new stress protein: synthesis of Schizosaccharomyces pombe UDP--Glc:glycoprotein glucosyltransferase mRNA is induced by stress conditions but the enzyme is not essential for cell viability. EMBO J 1996; 15:705-13. [PMID: 8631292 PMCID: PMC450269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
We have identified and begun the characterization of the gene encoding UDP-Glc:glycoprotein glucosyltransferase in Schizosaccharomyces pombe. This gene, here designated gpt1, codes for a polypeptide having a signal peptide of 18 amino acids followed by 1429 amino acids with no transmembrane domain, as expected for a soluble protein of the endoplasmic reticulum (ER). The C-terminal tetrapeptide PDEL most probably corresponds to a novel ER retention signal in this fission yeast. Synthesis of the corresponding mRNA was induced 2- to 9-fold by conditions known to affect glycoprotein folding in the ER (e.g. heat shock, culture in the presence of a Ca2+ionophore, 2-mercaptoethanol or inhibitors of protein N-glycosylation such as tunicamycin or 2-deoxyglucose). This is the first evidence obtained in vivo that supports the proposed involvement of the enzyme in the quality control of glycoprotein folding in the ER. Thus far, the said involvement was inferred solely from the ability of the enzyme to glucosylate misfolded but not native glycoproteins in cell-free assays. The gpt1 gene was disrupted and gpt1- cells were found to be viable. Moreover, no significant differences in the growth rate patterns at 18, 28 or 39 degrees C or in cell morphology between gpt1+ and gpt1- cells were observed, although they differed slightly in size.
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225
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Fernandez F, Jannatipour M, Hellman U, Rokeach LA, Parodi AJ. A new stress protein: synthesis of Schizosaccharomyces pombe UDP-Glc:glycoprotein glucosyltransferase mRNA is induced by stress conditions but the enzyme is not essential for cell viability. EMBO J 1996. [DOI: 10.1002/j.1460-2075.1996.tb00406.x] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
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