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Prado F, Aguilera A. Partial depletion of histone H4 increases homologous recombination-mediated genetic instability. Mol Cell Biol 2005; 25:1526-36. [PMID: 15684401 PMCID: PMC548009 DOI: 10.1128/mcb.25.4.1526-1536.2005] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
DNA replication can be a source of genetic instability. Given the tight connection between DNA replication and nucleosome assembly, we analyzed the effect of a partial depletion of histone H4 on genetic instability mediated by homologous recombination. A Saccharomyces cerevisiae strain was constructed in which the expression of histone H4 was driven by the regulated tet promoter. In agreement with defective nucleosome assembly, partial depletion of histone H4 led to subtle changes in plasmid superhelical density and chromatin sensitivity to micrococcal nuclease. Under these conditions, homologous recombination between ectopic DNA sequences was increased 20-fold above the wild-type levels. This hyperrecombination was not associated with either defective repair or transcription but with an accumulation of recombinogenic DNA lesions during the S and G(2)/M phases, as determined by an increase in the proportion of budded cells containing Rad52-yellow fluorescent protein foci. Consistently, partial depletion of histone H4 caused a delay during the S and G(2)/M phases. Our results suggest that histone deposition defects lead to the formation of recombinogenic DNA structures during replication that increase genomic instability.
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177
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Prado F, Aguilera A. Impairment of replication fork progression mediates RNA polII transcription-associated recombination. EMBO J 2005; 24:1267-76. [PMID: 15775982 PMCID: PMC556405 DOI: 10.1038/sj.emboj.7600602] [Citation(s) in RCA: 214] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2004] [Accepted: 02/07/2005] [Indexed: 01/27/2023] Open
Abstract
Homologous recombination safeguards genome integrity, but it can also cause genome instability of important consequences for cell proliferation and organism development. Transcription induces recombination, as shown in prokaryotes and eukaryotes for both spontaneous and developmentally regulated events such as those responsible for immunoglobulin class switching. Deciphering the molecular basis of transcription-associated recombination (TAR) is important in understanding genome instability. Using novel plasmid-borne recombination constructs in Saccharomyces cerevisiae, we show that RNA polymerase II (RNAPII) transcription induces recombination by impairing replication fork progression. RNAPII transcription concomitant to head-on oncoming replication causes a replication fork pause (RFP) that is linked to a significant increase in recombination. However, transcription that is codirectional with replication has little effect on replication fork progression and recombination. Transcription occurring in the absence of replication does not affect either recombination or replication fork progression. The Rrm3 helicase, which is required for replication fork progression through nucleoprotein complexes, facilitates replication through the transcription-dependent RFP site and reduces recombination. Therefore, our work provides evidence that one mechanism responsible for TAR is RNAP-mediated replication impairment.
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178
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Sáez-Martín L, Riera-Del Moral L, Gutiérrez-Nistal M, Aguilera A, Stefanov S, Riera de Cubas L. Ligadura accidental de arteria mesentérica superior como complicación de nefrectomía mediante cirugía laparoscópica. ANGIOLOGIA 2005. [DOI: 10.1016/s0003-3170(05)74920-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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179
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Zipperman M, Aguilera A, Joo E, Shutter L, Ashwal S, Tong K. 359 REGIONAL ASSESSMENT OF ADULT TRAUMATIC BRAIN INJURY USING SUSCEPTIBILITY WEIGHTED MAGNETIC RESONANCE IMAGING CORRELATED TO LONG TERM OUTCOME. J Investig Med 2005. [DOI: 10.2310/6650.2005.00005.358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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180
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Gonzalez-Quintela A, Gude F, Boquete O, Aguilera A, Rey J, Meijide LM, Fernandez-Merino MC, Vidal C. Association of hepatitis A virus infection with allergic sensitization in a population with high prevalence of hepatitis A virus exposure. Allergy 2005; 60:98-103. [PMID: 15575938 DOI: 10.1111/j.1398-9995.2005.00682.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
BACKGROUND An inverse association between allergic sensitization and markers of exposure to food-borne and orofecal infections (particularly hepatitis A virus, HAV) has been reported. The prevalence of HAV exposure and allergic sensitization vary widely in different areas, and vary along with age within a given area. AIM To investigate the association between HAV exposure and allergic sensitization in adults from a mostly rural area of Spain. METHODS An age-stratified random sample of 720 subjects was drawn from the population older than 18 years of A-Estrada, Spain. From 697 eligible subjects, 469 (67.2%, median age 54 years, range: 18-92) participated in the study. Positive skin prick tests to a panel of aeroallergens defined allergic sensitization. Positive serum HAV antibodies (assayed in 465 subjects) defined HAV exposure. RESULTS The prevalence of HAV exposure was 83.6% (95% CI: 80.7-86.5). The prevalence of allergic sensitization was lower in subjects with HAV exposure than in patients without it (25.0%vs 40.0%, OR 0.44, 95% CI: 0.25-0.77, P=0.004), but this association became substantially altered after adjusting for age, which was closely linked to both allergic sensitization and HAV exposure (adjusted OR 1.15, 95% CI: 0.60-2.19, P=0.66). CONCLUSIONS In a population with high prevalence of HAV exposure, no significant association between HAV exposure and allergic sensitization is observed after controlling for the confounding effect of age.
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181
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Rondón AG, Gallardo M, García-Rubio M, Aguilera A. Molecular evidence indicating that the yeast PAF complex is required for transcription elongation. EMBO Rep 2004; 5:47-53. [PMID: 14710186 PMCID: PMC1298956 DOI: 10.1038/sj.embor.7400045] [Citation(s) in RCA: 88] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2003] [Revised: 10/02/2003] [Accepted: 10/28/2003] [Indexed: 11/09/2022] Open
Abstract
PAF is a five-subunit protein complex composed of Paf1, Cdc73, Leo1, Rtf1 and Ctr9, which was purified from yeast in association with RNA polymerase II and which is believed to function in transcription elongation. However, no direct proof exists for this yet. To assay whether PAF is required in elongation, we determined the in vitro transcription-elongation efficiencies of mutant cell extracts using a DNA template containing two G-less cassettes. paf1Delta or cdc73Delta cell extracts showed reduced transcription-elongation efficiencies (16-18% of the wild-type levels), whereas leo1Delta and rtf1Delta showed wild-type levels. In vivo transcription efficiency was diminished in the four mutants analysed, as determined by their abilities to transcribe lacZ. Our work provides molecular evidence that PAF has a positive role in transcription elongation and is composed of at least two functionally different types of subunits (Paf1-Cdc73 and Leo1-Rtf1).
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182
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Fernández de Bobadilla L, García Villanueva A, Collado M, de Juan A, Rojo R, Pérez J, Lisa E, Aguilera A, Mena A, González-Palacios F. Breast metastasis of primary colon cancer. REVISTA ESPANOLA DE ENFERMEDADES DIGESTIVAS 2004; 96:415-7; 418-9. [PMID: 15230671 DOI: 10.4321/s1130-01082004000600007] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Metastatic tumors to the breast from colon adenocarcinoma are very rare. They are usually indicative of disseminated disease, and the prognosis is poor. Generally, radical operation should be avoided unless needed for palliation. This case report described a patient with breast metastasis from colon adenocarcinoma treated by simple mastectomy.
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183
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Duconge J, Prats PA, Valenzuela C, Aguilera A, Rojas I, Becquer MA, Alvarez D, Estrada L, Alfonso-Ortíz S, Hardy-Rando E, García-Pulpeiro O, Fernández-Sánchez E. Topical disposition of two strengths of a 125I-rhEGF jelly in rat skin wounds. Biopharm Drug Dispos 2004; 25:193-201. [PMID: 15248188 DOI: 10.1002/bdd.393] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Growth factors have proved to be an effective therapeutic strategy. However, some controversies have arisen concerning their efficacy in topical wound treatments. Stabilization of epidermal growth factors at the wound site and long-lasting receptor occupancy are important factors for wound repair. This study evaluated the cumulative profiles of two jellies containing 10 or 20 microg of 125I-rhEGF per gram of jelly, in a rat full-thickness skin lesion model. The prolonged time-courses at the wound sites for both strengths compared with saline solutions previously evaluated using a similar skin lesion model are reported. It seems that these two topical formulations that provide more sustained amounts of 125I-rhEGF over the period of sampling, would probably achieve the required wound healing response in terms of cell proliferation, collagen deposition and protein synthesis. Further studies need to be developed in order to elucidate whether such an in vivo disposition pattern is consistent with an earlier and stronger promotion of wound healing events.
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184
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Pi-Figueras M, Aguilera A, Arellano M, Miralles R, Garcia-Caselles P, Torres R, Cervera AM. Prevalence of delirium in a geriatric convalescence hospitalization unit: patient's clinical characteristics and risk precipitating factor analysis. Arch Gerontol Geriatr 2004:333-7. [PMID: 15207431 DOI: 10.1016/j.archger.2004.04.062] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The aim was to evaluate the prevalence of delirium among patients discharged from an acute care hospital and admitted to a geriatric convalescence unit (GCU), and to analyze patient's characteristics and risk precipitating factors. Sixty-eight patients were analyzed during a 2-week period. The confusion assessment method (CAM) was used to detect delirium. The precipitating factors evaluated were: major surgery-intensive care unit(ICU) stay, pulmonary and heart failure, acute infections, metabolic disorders/anemia,psychoactive medications, other drugs, severe pain, changing environmental influences and others. According to CAM, fifteen patients presented delirium (22%), and in 14 of them(93.3 %) the delirium was developed before admission at GCU. The precipitating factors in the studied population were the following: changing environmental influences in 66 patients(97%) (15 with delirium and 51 without delirium); other drugs 56 (82.3 %) (11 vs. 45);others 56 (82.3%) (9 vs. 24); psychoactive medications 50 (73.5%) (12 vs. 38); acute infections 48 (70.5 %) (13 vs. 35); metabolic disorders/anemia 40 (58.8 %) (9 vs. 31); major surgery-ICU stay 28 (41 .1%) (8 vs. 20); severe pain 26 (38.2%) (6 vs. 20); pulmonary and heart failure 22 (32.3%) (5 vs. 17). The univariant analysis showed that, none of the precipitating factors studied was significantly related to delirium. Seventy-two patients (91.1%) had simultaneously >3 precipitating factors. There were 16 patients with >6 precipitating factors, 7 of 15 with delirium and 9 of the 53 without delirium (46.6 % vs 16.9 %) (p < 0.05). The prevalence of delirium has been 22 %. Most of the patients had developed delirium before the admission at GCU. A high proportion of patients had >3 precipitating factors. In the study the presence of > 6 precipitating factors simultaneously has been significantly related to delirium.
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185
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Garcia-Caselles P, Miralles R, Arellano M, Torres RM, Aguilera A, Pi-Figueras M, Cervera AM. Validation of a modified version of the Gijon's social-familial evaluation scale (SFES): the "Barcelona SFES Version", for patients with cognitive impairment. Arch Gerontol Geriatr 2004:201-6. [PMID: 15207415 DOI: 10.1016/j.archger.2004.04.028] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The aim was to validate an abbreviated version of the Gijon's social-familial evaluation scale (SFES) (Barcelona-SFES version), on patients with cognitive impairment. A group of 34 patients with cognitive impairment, admitted to an intermediate-long-term-care facility, were analyzed. Mean age was 80.2 +/- 7.4 years. Gijón's SFES was abbreviated and only the first three item groups corresponding to family conditions, social contacts and assistance from the social network were selected. Barcelona-SFES version had a range score between 3 to 15 points, in which low scores identify older patients who live with their family, have good contacts, and participate in community activities. In contrast, high scores identify older persons who live alone and have poor social support and little participation with community activities. Three social risk categories were established according to the Barcelona-SFES score: low social risk (>/= 7 points), intermediate social risk (8-9 points) and high social points). Validation criteria used in the present study were: predictive value of Barcelona-SFES score of post-discharge destination (home or institution), and patient's (or family's) request for a definitive institutionalization in a nursing home. There were 9 patients with low social risk (26.4 %), 8 with intermediate social risk (23.5 %) and 17 with high social risk (50 %). A significant relationship between Barcelona-SFES scores and post-discharge destination was found. Eighty percent of patients discharged to an institution(nursing and residential homes), they had high social risk SFES scores (>/= 10) Also, a significant correlation was found between the number of patients for which a definitive institutionalization request was performed and the Barcelona-SFES scores. Fifteen (88.2 %) of the 18 patients for whom the request was done, were in the high social risk group. The lowest scores from SFES were predictive of home discharge, while the highest scores were predictive of a definitive institutionalization.
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186
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Prado F, Cortés-Ledesma F, Aguilera A. The absence of the yeast chromatin assembly factor Asf1 increases genomic instability and sister chromatid exchange. EMBO Rep 2004; 5:497-502. [PMID: 15071494 PMCID: PMC1299049 DOI: 10.1038/sj.embor.7400128] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2003] [Revised: 02/20/2004] [Accepted: 02/24/2004] [Indexed: 01/06/2023] Open
Abstract
Histone chaperone Asf1 participates in heterochromatin silencing, DNA repair and regulation of gene expression, and promotes the assembly of DNA into chromatin in vitro. To determine the influence of Asf1 on genetic stability, we have analysed the effect of asf1Delta on homologous recombination. In accordance with a defect in nucleosome assembly, asf1Delta leads to a loss of negative supercoiling in plasmids. Importantly, asf1Delta increases spontaneous recombination between inverted DNA sequences. This increase correlates with an accumulation of double-strand breaks (DSBs) as determined by immunodetection of phosphorylated histone H2A and fluorescent detection of Rad52-YFP foci during S and G2/M phases. In addition, asf1Delta shows high levels of sister chromatid exchange (SCE) and is proficient in DSB-induced SCE as determined by physical analysis. Our results suggest that defective chromatin assembly caused by asf1Delta leads to DSBs that can be repaired by SCE, affecting genetic stability.
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187
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Villamil I, González-Quintela A, Aguilera A, Tomé S, Otero E, Castroagudín FJ, Varo E. Truly de novo hepatitis B after liver transplantation. Am J Gastroenterol 2004; 99:767-8. [PMID: 15089918 DOI: 10.1111/j.1572-0241.2004.04126.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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188
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Aguilera A, Benítez T. Relationship between growth, fermentation, and respiration rates inSaccharomyces cerevisiae: A study based on the analysis of the yield Ypx. Biotechnol Bioeng 2004; 32:240-4. [DOI: 10.1002/bit.260320215] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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189
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Aguilera A, Pi-Figuews M, Arellano M, Torres RM, García-Caselles MP, Robles MJ, Miralles R, Cervera AM. PREVIOUS COGNITIVE IMPAIRMENT AND FAILURE TO THRIVE SYNDROME IN PATIENTS WHO DIED IN A GERIATRIC CONVALESCENCE HOSPITALIZATION UNIT. Arch Gerontol Geriatr 2004:7-11. [PMID: 15207390 DOI: 10.1016/j.archger.2004.04.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Cognitive impairment and depression are commonly associated with poor outcomes in geriatric patients. Both are part of the "failure to thrive syndrome" (FTS), that is a combined group of symptoms as a result from progressive functional, mental and nutritional impairment status in older patients. This paper was aimed at evaluating the presence of FTS in the patients who died in a geriatric convalescence unit (GCU) (intermediate care facility) and comparing the characteristics of patients with primary FTS (not associated with an evident identifiable disease) and secondary FTS (associated with an evident identifiable disease). Finally, we wanted to analyze if the presence of cognitive impairment before admission was associated with the type of FTS. We analyzed 78 patients retrospectively. The presence of the next three conditions was necessary to define the FTS: (i) Impaired functional status and malnutrition. (ii) Cognitive impairment and/or depression. (iii) Absence of improvement, after a specific geriatric intervention program during the hospitalization. Functional status for basic and instrumental activities of daily living (ADL and IADL) and the presence of symptoms cognitive impairment before admission were evaluated. Of the 78 analyzed patients, there were 30 (38.4%) with symptoms of FTS. Seventeen of them (56.6%) had a secondary FTS and 13 (43.3%) a primary one. This last group of patients had a significantly higher mean age (84.7 +/- 5.8 vs. 78.6 +/- 7.2; p < 0.02) and before admission they were significantly more dependent for ADL: 10 patients (76.9%) vs. 7 (41.0%) chi2 = 3.833, p < 0.05. A higher proportion of subjects with cognitive impairment before admission was found in the group of patients with primary FTS, than in those secondary FTS, although this difference did not reach statistical significance. Patients with primary FTS seem to be older and more dependent for ADL before admission, than those with secondary FTS.
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190
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Selgas R, Bajo MA, Aguilera A, Sánchez-Tomero JA, Cirugeda A, del Peso G, Alvarez V, Jiménez-Heffernan JA, Díaz C, López-Cabrera M. [Epithelial-mesenchymal transition in fibrosing processes. Mesothelial cells obtained ex vivo from patients treated with peritoneal dialysis as transdifferentiation model]. Nefrologia 2004; 24:34-9. [PMID: 15083955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023] Open
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191
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Aguilera A, Joo E, Tong K, Holshouser B, Shutter L, Ashwal S, Colohan A, Haacke EM. 52 COMPARISON OF HEMORRHAGIC SHEARING INJURIES DETECTED BY MAGNETIC RESONANCE IMAGING TO 6 MONTH OUTCOMES AFTER TRAUMATIC BRAIN INJURY IN ADULTS. J Investig Med 2004. [DOI: 10.1136/jim-52-suppl1-52] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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192
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Caro P, Delgado R, Dapena F, Aguilera A. [Utility of intra-access pressure]. Nefrologia 2004; 24:357-63. [PMID: 15455496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/30/2023] Open
Abstract
Monitoring of vascular access is essential for clinical evaluation on hemodialysis patients, detects early disfunction of access, allows adequate dialysis and decreases the morbidity associated. Although is demonstrated that intra-access pressure (IAP) is a good method of screening to evaluate arterial-venous (AV) fistulas, its utility is uncommon because its measurement requires a complex system. We would like to validate the utility of IAP monitoring using a simplified measure of IAP and its relation with other methods of screening in detecting stenoses prior to thromboses of AV grafts. We studied 24 AV grafts of 24 patients during 18 months we measured arterial pressure, mean arterial pressure (MAP), dynamic venous pressure, IAP, Kt/v, URR, recirculation index (RI), access flow and color Doppler flow, dividing the patients in two groups, with stenoses or not, if IAP/MAP > 0.5 and stenoses > 0.50 by Doppler we performed arteriography and percutaneous transluminal angioplasty with stent if stenoses exits. The values of IAP, MAP, RI were higher significantly in the stenoses group with increase of vascular access in grafts were dilation by angioplasty was made. All stenoses detected with IAP were confirmed by Doppler and arteriography but one. We conclude that IAP is an early, useful, easy, effective method in detecting stenoses of AV grafts prior to thrombosis.
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193
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Torres RM, Miralles R, Garcia-Caselles MP, Arellano M, Aguilera A, Pi-Figueras M, Cervera AM. OBSERVATIONAL SCALE AND GERIATRIC DEPRESSION SCALE OF YESAVAGE TO IDENTIFY DEPRESSIVE SYMPTOMS IN OLDER PATIENTS. Arch Gerontol Geriatr 2004:437-42. [PMID: 15207445 DOI: 10.1016/j.archger.2004.04.056] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The diagnosis of depression by clinical interview may be difficult in the patients with communication problems (aphasia, severe cognitive impairment or severe deafness). In these cases, depressive symptoms may be observed by others (nurses and caregivers). The aim of this study was to evaluate the clinical usefulness of an observational scale to identify depression in older patients. Seventy-six institutionalized patients in an intermediate-long-term care center were evaluated. Of them, 39 were excluded because they were unable to perform a clinical interview, needed to diagnose depression. Of the excluded patients, 18 had aphasia, 7 showed severe cognitive impairment: their mini mental state examination (MMSE) score < 14, and 14 collaborated very poorly. Thus 37 patients were analyzed, mean age was 83 +/- 0.86 years (30 women and 7 men). Diagnostic categories were: neurological 16 patients (43.2%), fractures/orthopedics 6 (16.2%), pulmonary/cardiology 5 (13.5%) and others 10 (27.1%). The mean Barthel index was 57.0 +/- 31.6 and mean MMSE score was 21.1 +/- 4.3. The observational scale (OS) designed with six items, was applied to all patients. Each item was scored as never (0 points), sometimes (1 point) and always (2 points). Thus total OS score ranged from 0 to 12. Two observers, who knew the patients (nurses), applied the OS. A trained geriatrician, using the 15-item geriatric depression scale (GDS) performed detection of depressive symptoms. There were 15 patients (40.5 %) with depression on the GDS. OS scale score with a cutoff point of 5 or more was present in 13 patients; nine of them had depression (69.2 %). In the remaining 24 patients with an OS score < 5, depression was present only in 6 cases (25%) (chi2 = 6.844; p < 0.01). The OS >/= 5, in the present study, obtained a sensitivity of 60 %, a specificity of 81 %, a positive predictive value of 69 %, and a negative predictive value of 75 %.We concluded that (i) the OS has been useful for identifying depressive symptoms with an acceptable sensitivity and specificity, and (ii) the OS may be an alternative to detect depression in patients who are unable to perform a clinical interview.
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194
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Arellano M, Garcia-Caselles MP, Pi-Figueras M, Miralles R, Torres RM, Aguilera A, Cervera AM. CLINICAL IMPACT OF DIFFERENT SCORES OF THE MINI NUTRITIONAL ASSESSMENT (MNA) IN THE DIAGNOSIS OF MALNUTRITION IN PATIENTS WITH COGNITIVE IMPAIRMENT. Arch Gerontol Geriatr 2004:27-31. [PMID: 15207392 DOI: 10.1016/j.archger.2004.04.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
It was aimed at evaluating the clinical usefulness of the mini nutritional assessment (MNA) to identify malnutrition in elderly patients with cognitive impairment, admitted to a geriatric convalescence unit (intermediate care facility). Sixty-three patients with cognitive impairment were studied. Cognitive impairment was considered when mini mental state examination (MMSE) scores were below 21. MNA and a nutritional evaluation according to the sequential model of the American Institute of Nutrition (AIN) were performed at admission. According to the AIN criteria, malnutrition was considered, if there were abnormalities in at least one of the following parameters: albumin, cholesterol, body mass index (BMI), and branchial circumference. Based on these criteria, 27 patients (42.8%) proved to be undernourished at admission, whereas if taking the original MNA scores, 39 patients (61.9%) were undernourished, 23 (36.5%) were at risk of malnutrition, and 1 (1.5%) was normal. The analyzed population was divided in four categories (quartiles) of the MNA scores: very low (</= 13.5), low (> 13.5 and </= 16), intermediate (> 16 and </= 18.5) and high (> 18.5). Likelihood ratios of each MNA quartile were obtained by dividing the percentage of patients in a given MNA category who were undernourished (according to AIN) by the percentage of patients in the same MNA category who were not undernourished. In the very low MNA quartile, this likelihood ratio was 2.79 and for the low MNA quartile it was 0.49. For intermediate and high MNA categories, likelihood ratios were 1.0 and 0.07 respectively. In the present study, MNA identified undernourished patients with a high clinical diagnostic impact value only, when very low scores (</= 13) are obtained.
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195
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Aguilera A, Joo E, Tong K, Holshouser B, Shutter L, Ashwal S, Colohan A, Haacke EM. COMPARISON OF HEMORRHAGIC SHEARING INJURIES DETECTED BY MAGNETIC RESONANCE IMAGING TO 6 MONTH OUTCOMES AFTER TRAUMATIC BRAIN INJURY IN ADULTS. J Investig Med 2004. [DOI: 10.1097/00042871-200401001-00052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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196
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Rodríguez-Méndez ML, González-Quintela A, Aguilera A, Carballo E, Barrio E. Association of HCV and HBV markers in Spanish HIV-seropositive patients in relation to risk practices. HEPATO-GASTROENTEROLOGY 2003; 50:2093-7. [PMID: 14696471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
BACKGROUND/AIMS HBV, HCV, and HIV have some transmission routes in common. Viral liver disease is a leading cause of mortality in HIV-infected patients. The study was aimed at evaluating the prevalence of HBV and HCV markers in subjects with different risk practices for HIV infection. METHODOLOGY A total of 699 subjects were studied Of these subjects, 517 were intravenous drug users (373 HIV-positive and 144 HIV-negative), 127 had heterosexual risk practice (66 HIV-positive and 61 HIV-negative), 31 had homosexual risk practice (all HIV-positive), 15 had post-transfusional HIV infection, and nine had HIV infection of unknown source. Patients with anti-HBc antibody were considered HBV-positive, and cases with anti-HCV antibodies were considered HCV-positive. RESULTS Among patients with HIV infection, most intravenous drug users (79%) had markers of both HBV and HCV, compared with 20%, 11%, and 10% of cases infected by transfusional, heterosexual, and homosexual route, respectively (p < 0.001). Absence of both HBV and HCV markers was observed in most HIV-positive heterosexuals (62%) compared with 40% of post-transfusional cases, 32% of homosexuals and 4% of intravenous drug users (p: NS, p = 0.009, and p < 0.001, respectively). Isolated HBV-positivity was the most frequent pattern in HIV-infected homosexuals (58%), compared with 27% of post-transfusional, 21% of heterosexuals and 11% of intravenous drug users (p: NS, p < 0.001 and p < 0.001, respectively). HIV-negative intravenous drug users had a lower prevalence of HBV/HCV association than HIV-positive cases (p < 0.001). Isolated HCV-positivity was more frequent in HIV-negative than in HIV-positive intravenous drug users (27% vs. 6%, p < 0.001). In heterosexuals, isolated HBV-positivity was more prevalent in HIV-positive than in HIV-negative cases (21% vs. 7%, p = 0.04). CONCLUSIONS HBV and HCV seroprevalence in HIV infected patients vary depending on the risk practice. This suggests a variable transmissibility depending on the route considered. Within the same risk practice, differences in HCV and HBV seroprevalence between HIV-positive and HIV-negative cases suggest that some factors associated with HIV infection may influence the rate of infection by HCV and HBV.
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Rondón AG, Jimeno S, García-Rubio M, Aguilera A. Molecular evidence that the eukaryotic THO/TREX complex is required for efficient transcription elongation. J Biol Chem 2003; 278:39037-43. [PMID: 12871933 DOI: 10.1074/jbc.m305718200] [Citation(s) in RCA: 89] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
THO/TREX is a conserved eukaryotic complex formed by the core THO complex plus proteins involved in mRNA metabolism and export such as Sub2 and Yra1. Mutations in any of the THO/TREX structural genes cause pleiotropic phenotypes such as transcription impairment, increased transcription-associated recombination, and mRNA export defects. To assay the relevance of THO/TREX complex in transcription, we performed in vitro transcription elongation assays in mutant cell extracts using supercoiled DNA templates containing two G-less cassettes. With these assays, we demonstrate that hpr1delta, tho2delta, and mft1delta mutants of the THO complex and sub2 mutants show significant reductions in the efficiency of transcription elongation. The mRNA expression defect of hpr1delta mutants was not due to an increase in mRNA decay, as determined by mRNA half-life measurements and mRNA time course accumulation experiments in the absence of Rrp6p exoribonuclease. This work demonstrates that THO and Sub2 are required for efficient transcription elongation, providing further evidence for the coupling between transcription and mRNA metabolism and export.
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198
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Selgas R, Bajo MA, Cirugeda A, del Peso G, Aguilera A, Gil F, Fernández-Perpén A, Alvarez V, Sánchez-Tomero JA, López-Cabrera M, Sánchez-Madrid F. [Early diagnosis, prevention and treatment of the peritoneal sclerosis syndromes]. Nefrologia 2003; 23 Suppl 3:38-43. [PMID: 12901191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023] Open
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Castro MA, Bajo MA, del Peso G, Larrocha C, Castro MJ, Sánchez-Tomero JA, Cirugeda A, Aguilera A, Alvarez V, Costero O, Vara F, Fernández-Chacón JL, Selgas R. [Influence of different pharmacological agents in the ex vivo proliferation of mesothelial cells obtained from the peritoneal effluent of patients treated with peritoneal dialysis]. Nefrologia 2003; 23:243-51. [PMID: 12891939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023] Open
Abstract
UNLABELLED Mesothelial cells (MC) are the first peritoneal membrane barrier in contact with dialysate. The aim of this study was to analyze the in vitro capacity of different pharmacological agents to modify the ex vivo proliferation of MC obtained from the peritoneal effluent of patients treated with peritoneal dialysis (PD). MATERIAL AND METHODS Thirty cultures of MC taken from nocturnal peritoneal effluent were performed. After identification, MC are subcultured in 24 multi-well plates, adding the different exogenous agents. Proliferative capacity and cell morphology were estimated on day 16th of culture. The agents evaluated were insulin, IGF-1, tamoxifen, labetalol, carvedilol, enalapril and losartan. RESULTS Insulin shows a dose-dependent effect on MC growth, with a limit that is stimulated by the addition of fetal bovine serum (FBS). Concentrations higher than 100 micrograms/ml, are not associated with further growth, even with cell damage. In contrast, the wide range of IGF-1 dose used did not affect to MC proliferation. Tamoxifen causes negative effects on MC growth just a very high doses, not resembling doses in clinical practice. Labetalol does not modify MC proliferation used under therapeutic calculated range. However, concentrations higher than 40 micrograms/ml showed a negative influence on growth, behaving as lethal doses that over 100 micrograms/ml. The addition of FBS attenuates this effect. These effects were very similar to that caused by carvedilol addition. Enalapril and losartan act as antiproliferative agents for MC. This effect is potentiated with angiotensin II, reaching lethal concentrations increasing the dose. In conclusion, mesothelial cell growth ex vivo taken from nocturnal peritoneal effluent on PD patients is an useful tool to explore the effects of any pharmacological agent on the biology of the cell of the peritoneum. The agents used had any influence in the proliferation capacity of mesothelial cells.
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García-Rubio M, Huertas P, González-Barrera S, Aguilera A. Recombinogenic Effects of DNA-Damaging Agents Are Synergistically Increased by Transcription inSaccharomyces cerevisiae: New Insights Into Transcription-Associated Recombination. Genetics 2003; 165:457-66. [PMID: 14573461 PMCID: PMC1462770 DOI: 10.1093/genetics/165.2.457] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
AbstractHomologous recombination of a particular DNA sequence is strongly stimulated by transcription, a phenomenon observed from bacteria to mammals, which we refer to as transcription-associated recombination (TAR). TAR might be an accidental feature of DNA chemistry with important consequences for genetic stability. However, it is also essential for developmentally regulated processes such as class switching of immunoglobulin genes. Consequently, it is likely that TAR embraces more than one mechanism. In this study we tested the possibility that transcription induces recombination by making DNA more susceptible to recombinogenic DNA damage. Using different plasmid-chromosome and direct-repeat recombination constructs in which transcription is driven from either the PGAL1- or the Ptet-regulated promoters, we haveshown that either 4-nitroquinoline-N-oxide (4-NQO) or methyl methanesulfonate (MMS) produces a synergistic increase of recombination when combined with transcription. 4-NQO and MMS stimulated recombination of a transcriptionally active DNA sequence up to 12,800- and 130-fold above the spontaneous levels observed in the absence of transcription, whereas 4-NQO and MMS alone increased recombination 193- and 4.5-fold, respectively. Our results provide evidence that TAR is due, at least in part, to the ability of transcription to enhance the accessibility of DNA to exogenous chemicals and internal metabolites responsible for recombinogenic lesions. We discuss possible parallelisms between the mechanisms of induction of recombination and mutation by transcription.
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