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Redondo J, Manso AM, Pacheco ME, Hernández L, Salaices M, Marín J. Hypothermic storage of coronary endothelial cells reduces nitric oxide synthase activity and expression. Cryobiology 2000; 41:292-300. [PMID: 11222026 DOI: 10.1006/cryo.2000.2285] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Preservation with University of Wisconsin (UW) solution has been implicated in coronary artery endothelial damage and loss of endothelium-dependent vasodilatation. Therefore, the objective of this study was to investigate the effect of this solution on basal nitric oxide (NO) release from porcine coronary endothelial cells (CEC). Cultures were exposed to cold (4 degrees C) storage in UW solution for 6, 8 and 12 h. Parallel cultures were incubated with control medium at 37 degrees C. After treatment, NO release was evaluated by nitrite production, a stable metabolite of NO. Activity of the constitutive endothelial nitric oxide synthase (eNOS) was measured by the conversion [3H]-l-arginine to [3H]-l-citrulline and eNOS protein expression by Western blotting. Nitrite production by control cells was augmented with increasing times of incubation, whereas no change was observed in those cultures preserved with UW solution. Activity of eNOS was significantly decreased compared to the respective control group by cold storage of cells for longer periods than 6 h. Such decrease was correlated with a diminished eNOS protein expression in CEC preserved with UW solution after 8- and 12-h storage. These results suggest that prolonged hypothermic storage of CEC with UW solution does not preserve basal NO release because of a certain loss of eNOS protein, which may contribute to the reported injury of heart transplants after long-term preservation.
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Pons T, Hernández L, Batista FR, Chinea G. Prediction of a common beta-propeller catalytic domain for fructosyltransferases of different origin and substrate specificity. Protein Sci 2000; 9:2285-91. [PMID: 11305239 PMCID: PMC2144480 DOI: 10.1110/ps.9.11.2285] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The three-dimensional (3D) structure of fructan biosynthetic enzymes is still unknown. Here, we have explored folding similarities between reported microbial and plant enzymes that catalyze transfructosylation reactions. A sequence-structure compatibility search using TOPITS, SDP, 3D-PSSM, and SAM-T98 programs identified a beta-propeller fold with scores above the confidence threshold that indicate a structurally conserved catalytic domain in fructosyltransferases (FTFs) of diverse origin and substrate specificity. The predicted fold appeared related to that of neuraminidase and sialidase, of glycoside hydrolase families 33 and 34, respectively. The most reliable structural model was obtained using the crystal structure of neuraminidase (Protein Data Bank file: 5nn9) as template, and it is consistent with the location of previously identified functional residues of bacterial levansucrases (Batista et al., 1999; Song & Jacques, 1999). The sequence-sequence analysis presented here reinforces the recent inclusion of fungal and plant FTFs into glycoside hydrolase family 32, and suggests a modified sequence pattern H-x (2)-[PTV]-x (4)-[LIVMA]-[NSCAYG]-[DE]-P-[NDSC][GA]3 for this family.
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Pérez J, Colasante C, Tucci S, Hernández L, Rada P. Effects of feeding on extracellular levels of glutamate in the medial and lateral portion of the globus pallidus of freely moving rats. Brain Res 2000; 877:91-4. [PMID: 10980248 DOI: 10.1016/s0006-8993(00)02658-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The globus pallidus (GP) is considered to be part of the basal ganglia and previous research has determined that it might be involved in feeding behavior. For example, it has been shown that the GP becomes active during feeding and that disinhibition of this nucleus, by locally injecting a GABA antagonist, is sufficient to induce feeding in a satiated rat. However, few studies have measured extracellular levels of glutamate during free feeding in the GP of rats. For this reason brain microdialysis coupled to capillary electrophoresis with laser-induced fluorescence was used to determine FTC-glutamate levels, either in the medial or lateral portion of the GP, of freely moving rats. Retrograde labeling of the neurons projecting to the two areas was also examined in an attempt to gain some insight on the identity of the neurons that released glutamate in the GP during feeding. Extracellular levels of glutamate-FTC differentially increased in both portions of the GP during a 2-min interval of free feeding. Retrograde labeling also showed that both areas received projections from different brain areas suggesting that each of the GP portions could be involved in separate aspects of the feeding behavior.
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104
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Hernández L, Chang CH, Cella D, Corona M, Shiomoto G, McGuire DB. Development and validation of the satisfaction with pharmacist scale. Pharmacotherapy 2000; 20:837-43. [PMID: 10907974 DOI: 10.1592/phco.20.9.837.35188] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
To assess patients' satisfaction with pharmacists, seven questions were developed with semistructured input from 5 pharmacy practice faculty members and 11 patients with cancer. The study identified 1617 English- and Spanish-speaking patients with cancer or human immunodeficiency virus infection or acquired immunodeficiency syndrome who participated in a multisite validation of the Functional Assessment of Cancer Therapy Scale. Of these, 1124 had seen a pharmacist in the past 7 days and therefore were eligible; 608 spoke English and 516 Spanish. The seven items on the Satisfaction with Pharmacist (SWiP) scale were rated on a five-point Likert scale (0 = not at all to 4 = very much). The reliability of the English and Spanish versions was evaluated by Cronbach's alpha coefficients. The unidimensionality and construct validity were analyzed with the Rasch rating scale model. The alpha coefficients for the English and Spanish versions were 0.90 and 0.92, respectively. Rasch analyses of item responses showed that none of the items in either language was a misfit, which supported their ability to measure a unidimensional construct. Item difficulty plots revealed that no item exhibited differential functioning, indicating that the items performed the same in both languages. The SWiP scale has reliable and valid psychometric properties in English and Spanish and can be used to document the value of the pharmacist-patient relationship. It is easy to administer and is ready for further use and evaluation to determine and document outcomes of pharmaceutical care.
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105
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González de la Huebra MJ, Hernández P, Nieto O, Ballesteros Y, Hernández L. Determination of carbendazim in soil samples by anodic stripping voltammetry using a carbon fiber ultramicroelectrode. FRESENIUS' JOURNAL OF ANALYTICAL CHEMISTRY 2000; 367:474-8. [PMID: 11227479 DOI: 10.1007/s002160000361] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
A method for the determination of carbendazim (MBC) by anodic stripping voltammetry using a carbon fiber ultramicroelectrode was developed. The ultramicroelectrode was made in our laboratory and its electrochemical behavior was characterized by measuring the electrochemical response with a solution of potassium ferricyanide. The optimum parameters used for the determination of MBC are the following: 0.05 M phosphate buffer at pH 2.0 as supporting electrolyte; a scan rate of v = 10.00 V s(-1) and an accumulation potential of Eac = 0.00 V. The MBC was determined in a soil sample with the method proposed and the results found were comparable to those obtained by HPLC.
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106
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Hernández L, Sotolongo M, Rosabal Y, Menéndez C, Ramírez R, Caballero-Mellado J, Arrieta J. Structural levansucrase gene (lsdA) constitutes a functional locus conserved in the species Gluconacetobacter diazotrophicus. Arch Microbiol 2000; 174:120-4. [PMID: 10985751 DOI: 10.1007/s002030000173] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Levansucrase (EC 2.4.1.10) was identified as a constitutive exoenzyme in 14 Gluconacetobacter diazotrophicus strains recovered from different host plants in diverse geographical regions. The enzyme, consisting of a single 60-kDa polypeptide, hydrolysed sucrose to synthesise oligofructans and levan. Sugar-cane-associated strains of the most abundant genotype (electrophoretic type 1) showed maximal values of levansucrase production. These values were three-fold higher than those of the isolates recovered from coffee plants. Restriction fragment length polymorphism analysis revealed a high degree of conservation of the levansucrase locus (IsdA) among the 14 strains under study, which represented 11 different G. diazotrophicus genotypes. Targeted disruption of the lsdA gene in four representative strains abolished their ability to grow on sucrose, indicating that the endophytic species G. diazotrophicus utilises plant sucrose via levansucrase.
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López-Ríos F, Martínez-Cendejas E, Hernández L. Lymphoepitheliomalike carcinoma of the uterine cervix in cervicovaginal smears. Acta Cytol 2000; 44:694. [PMID: 10934967 DOI: 10.1159/000328549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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108
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Pinyol M, Hernández L, Martínez A, Cobo F, Hernández S, Beà S, López-Guillermo A, Nayach I, Palacín A, Nadal A, Fernández PL, Montserrat E, Cardesa A, Campo E. INK4a/ARF locus alterations in human non-Hodgkin's lymphomas mainly occur in tumors with wild-type p53 gene. THE AMERICAN JOURNAL OF PATHOLOGY 2000; 156:1987-96. [PMID: 10854221 PMCID: PMC1850083 DOI: 10.1016/s0002-9440(10)65071-7] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
INK4a/ARF locus codes for two different proteins, p16(INK4a) and p14(ARF), involved in cell cycle regulation. p14(ARF) is considered an upstream regulator of p53 function. To determine the role of these genes in the pathogenesis of human non-Hodgkin's lymphomas we have analyzed exon 1beta, 1alpha, and 2 of the INK4a/ARF locus and p53 gene aberrations in 97 tumors previously characterized for p16(INK4a) alterations. p53 alterations were detected in four of 51 (8%) indolent lymphomas but in 15 of 46 (33%) aggressive tumors. Inactivation of p14(ARF) was always associated with p16(INK4a) alterations. Exon 1beta was concomitantly deleted with exon 1alpha and 2 in eight tumors. One additional lymphoblastic lymphoma showed deletion of exon 1alpha and 2 but retained exon 1beta. No mutations were detected in exon 1alpha and 1beta in any case. Two of the three mutations detected in exon 2 caused a nonsense mutation in the p16(INK4a) reading frame and a missense mutation in the ARF reading frame involving the nucleolar transport domain of the protein. The third mutation was a missense mutation in the p16(INK4a) reading frame, but it was outside the coding region of p14(ARF). Aggressive lymphomas with p14(ARF) inactivation and p53 wild type showed a significantly lower p53 protein expression than tumors with no alteration in any of these genes. In this series of tumors, inactivation of the INK4a/ARF locus mainly occurred in tumors with a wild-type p53 gene because only two lymphomas showed simultaneous aberrations in these genes. Tumors with concomitant alterations of p16(INK4a) and p14(ARF)/p53 genes seem to exhibit a worse clinical behavior than lymphomas with no alterations or isolated inactivation of any of these genes. These findings indicate that p14(ARF) genetic alterations occur in a subset of aggressive NHLs, but they are always associated with p16(INK4a) aberrations. Concomitant disruption of p16(INK4a) and p14(ARF)/p53 regulatory pathways may have a cooperative effect in the progression of these tumors.
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López-Ríos F, Miguel PS, Bellas C, Ballestín C, Hernández L. Lymphoepithelioma-like carcinoma of the uterine cervix: a case report studied by in situ hybridization and polymerase chain reaction for Epstein-Barr virus. Arch Pathol Lab Med 2000; 124:746-7. [PMID: 10782160 DOI: 10.5858/2000-124-0746-llcotu] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Lymphoepithelioma-like carcinomas have been reported outside the nasopharynx in many sites, including the uterine cervix. The association with the Epstein-Barr virus in the latter site is still controversial. To date, Epstein-Barr virus genome has only been demonstrated in Asian patients. We report a case of lymphoepithelioma-like carcinoma of the uterine cervix in a white woman in whom the Epstein-Barr virus infection was tested for by in situ hybridization and polymerase chain reaction. The results of both techniques were negative. Our case and a review of the literature support the contention that cervical lymphoepithelioma-like carcinoma is not associated with Epstein-Barr virus infection in non-Asian patients.
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Baptista T, Lacruz A, de Mendoza S, Mendoza Guillén JM, Silvera R, Angeles F, Mendoza MT, Hernández L. Body weight gain after administration of antipsychotic drugs: correlation with leptin, insulin and reproductive hormones. PHARMACOPSYCHIATRY 2000; 33:81-8. [PMID: 10855458 DOI: 10.1055/s-2000-8451] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
Excessive body weight gain, hyperprolactinemia and low gonadal steroid serum levels are often observed during chronic administration of antipsychotic drugs (AP). Clinical and experimental findings suggest that leptin, the peptidic hormone involved in long-term body weight regulation, and reproductive hormones are interrelated. Therefore, we assessed circulating leptin levels in healthy, lean women (n = 12) and men (n = 7) before and after short-term administration of the AP sulpiride (SUL, 200 mg/day). In addition, we studied psychotic obese (n = 9) and lean women (n = 13) under chronic treatment with diverse AP. No significant weight changes were observed after SUL administration in healthy women--initial weight: 54.9+/-2.6 Kg; final weight: 55.04+/-2.6, NS. Leptin levels did not change either: 11.9+/-1.5 ng/ml. vs. 10.6+/-1.3, NS. By contrast, a small, but significant weight gain was found in SUL-treated men--60.6+/-1.9 Kg. vs. 61.3+/-2.1, p = 0.004. Leptin and insulin levels were significantly higher after SUL administration--leptin: 2.77+/-0.22 ng/ml. vs. 13.9+/-2.5, p=0.035; insulin: 3.59+/-0.17 mIU/ml vs. 8.81+/-0.81, p = 0.0001. In these subjects, leptin levels positively correlated with body weight change (p = 0.006), and serum prolactin change (p = 0.001). Obese psychotic women (Body Mass Index, BMI, Kg/m2 = 31.5+/-1.03) displayed higher leptin levels than non-obese psychotic women (BMI = 25.5+/-0.52): 26.8+/-4.8, vs. 12.8+/-3.4 ng/ml, p = 0.006. In these women, a significant positive correlation was found between leptin levels and BMI (p = 0.0001), and between leptin and basal insulin levels (p = 0.001). These results show that the expected circulating leptin elevation which is observed when body weight raises, is preserved in people treated with AP drugs.
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Orts D, Hernández L, Barroso E, Romero S. Hypertrophic osteoarthropathy in lung cancer: are the radiographic bone changes reversible after curative resection? Monaldi Arch Chest Dis 2000; 55:122-3. [PMID: 10949872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023] Open
Abstract
Lack of relief of bone and joint pains and persistence of the radiographic abnormalities in patients with secondary hypertrophic osteoarthropathy, after lung tumour removal, are considered as signs of an unfavourable prognosis. Two patients are documented in whom the lack of reversion of periosteal changes after tumour removal was compatible with a favourable long-term prognosis, suggesting that radiographic exploration is an insensitive technique to appreciate involutive bone changes occurring in these patients.
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López-Ríos F, Rodríguez-Peralto JL, Aguilar A, Hernández L, Gallego M. Proliferating trichilemmal cyst with focal invasion: report of a case and a review of the literature. Am J Dermatopathol 2000; 22:183-7. [PMID: 10770443 DOI: 10.1097/00000372-200004000-00018] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Proliferating trichilemmal cyst (PTC) is a rare but morphologically distinctive tumor that usually occurs in the scalp of elderly women. Furthermore, only 30 well-documented examples of so-called malignant PTC have been reported. Alternatively, some authors have recently proposed that PTC is squamous cell carcinoma. We describe a case of PTC with focal invasion that was indistinguishable from squamous cell carcinoma in areas, and we review the literature. This debate should be considered in PTCs to provide adequate treatment (wide local excision) and follow-up (long term), particularly in large and long-standing lesions.
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Hernández S, Hernández L, Bea S, Pinyol M, Nayach I, Bellosillo B, Nadal A, Ferrer A, Fernández PL, Montserrat E, Cardesa A, Campo E. cdc25a and the splicing variant cdc25b2, but not cdc25B1, -B3 or -C, are over-expressed in aggressive human non-Hodgkin's lymphomas. Int J Cancer 2000; 89:148-52. [PMID: 10754492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
cdc25 is a family of phosphatases that activate the cyclin-dependent kinases at different points of the cell cycle. cdc25A and -B, but not -C, have been shown to have oncogenic potential. Three different splicing variants of the cdc25B gene, cdc25B1, -B2 and -B3, have also been identified. Experimental studies suggest that cdc25B2 may be more active in vivo than cdc25B3 and -B1, but the relative expression of these splicing variants in human tumors is not known. In this study, we have analyzed the expression of cdc25A, -B1, -B2, -B3 and -C mRNA in 9 non-neoplastic lymphoid samples, 89 non-Hodgki&ngrave;s lymphomas and 9 hematological cancer cell lines by semi-quantitative RT-PCR. cdc25A, -B and -C protein expression was examined by Western blot. Normal peripheral blood lymphocytes and reactive tissues expressed cdc25B1 and -B3 mRNA and very low or undetectable levels of cdc25A, -B2 and -C. High levels of cdc25A and cdc25B2 were found in 35% and 39% of the tumors, respectively, and they were more frequently observed in aggressive than in indolent lymphomas. cdc25B1 and -B3 splice variants were detected in virtually all tumors, and no significant differences were found between high- and low-grade lymphomas. cdc25A and -B protein expression was also higher in aggressive than in indolent lymphomas. cdc25C expression was relatively low in virtually all cases. In conclusion, these findings suggest that cdc25A and -B2, but not cdc25B1, -B3 and -C, are over-expressed in a relatively large number of malignant lymphomas and may participate in the pathogenesis of aggressive variants.
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114
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Páez X, Rada P, Hernández L. Neutral amino acids monitoring in phenylketonuric plasma microdialysates using micellar electrokinetic chromatography and laser-induced fluorescence detection. JOURNAL OF CHROMATOGRAPHY. B, BIOMEDICAL SCIENCES AND APPLICATIONS 2000; 739:247-54. [PMID: 10755369 DOI: 10.1016/s0378-4347(99)00536-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Neutral and non-polar amino acids such as phenylalanine (Phe), valine (Val), tyrosine (Tyr), threonine (Thre) and GABA are hard to resolve by capillary zone electrophoresis (CZE). Their separation is possible by adding a surfactant to the mobile phase. This method is called micellar electrokinetic chromatography (MEKC). We used MEKC with laser-induced fluorescence detection (LIFD) to separate and quantitate these amino acids in plasma microdialysates of patients with phenylketonuria (PKU). This disease is an inborn enzymatic defect with decreased conversion of Phe to Tyr that causes severe neurological damage and mental deterioration, which is diagnosed by measuring plasma Phe and Phe/Tyr ratio. The amino acids tested had linear concentration-signal relation. PKU patients had significantly higher Phe, lower Tyr, 21 times higher Phe/Tyr ratio and decreased values of Val and Thre than controls. These results show that microdialysis of biological fluids coupled with MEKC-LIFD is a convenient technique to measure neutral amino acids in clinical disorders such as PKU.
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115
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Baptista T, Lacruz A, Acosta A, Colasante C, de Quijada M, de Mendoza S, Mendoza JM, Hernández L. Naltrexone does not prevent the weight gain and hyperphagia induced by the antipsychotic drug sulpiride in rats. Appetite 2000; 34:77-86. [PMID: 10744894 DOI: 10.1006/appe.1999.0284] [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: 11/22/2022]
Abstract
Few pharmacological tools are currently available to counteract the excessive body weight gain often observed during prolonged administration of antipsychotic drugs. Most antipsychotic drugs block dopamine receptors, and both the brain dopaminergic and opioid systems appear to be involved in initiation and maintenance of feeding behavior, respectively. We evaluated whether the opioid antagonist naltrexone (NAL, 0.5-16 mg/kg/ip for 21 days) (a) affects body weight and food intake in gonadally-intact and drug-free female rats, (b) prevents obesity, hyperphagia, hyperprolactinemia and vaginal cycle disruption induced by long-term administration of the antipsychotic drug sulpiride (SUL, 20 mg/kg/ip for 21 days), or (c) reverses the acute hyperphagia induced by SUL (15 microg bilaterally), when directly applied in the perifornical lateral hypothalamus (PFLH). In drug-free rats, only NAL doses above 4 mg/kg, significantly decreased weight gain and food intake. Even though NAL (1 and 8 mg/kg) significantly attenuated SUL-induced hyperphagia and hyperprolactinemia, it did not reverse at any dose the weight gain and permanent diestrous induced by SUL. In addition, local NAL did not prevent the hyperphagia and polidypsia observed after acute intrahypothalamic SUL. Unexpectedly, the cumulative and 24 h food intake in SUL-treated rats was significantly increased by NAL. Collectively, these results do not support a role for endogenous opiates in the neural and endocrine mechanisms involved in weight gain during prolonged antipsychotic drug administration in rats.
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116
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Baptista T, Lacruz A, de Mendoza S, Guillén MM, Burguera JL, de Burguera M, Hernández L. Endocrine effects of lithium carbonate in healthy premenopausal women: relationship with body weight regulation. Prog Neuropsychopharmacol Biol Psychiatry 2000; 24:1-16. [PMID: 10659979 DOI: 10.1016/s0278-5846(99)00085-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The mechanisms involved in Li-induced weight gain remain unclear. The higher frequency of obesity in women than in men under Li treatment, suggests a role for reproductive hormones. The serum levels of the following hormones were evaluated in healthy young women at diverse stages of a control menstrual cycle, and during Li carbonate (900 mg/day) or placebo administration: prolactin, luteinizing hormone, follicle-stimulating hormone, 17-1 estradiol, progesterone, thyroxine, thyrotropin, cortisol, dehidroepiandrosterone sulfate, free testosterone, leptin and an oral glucose tolerance test, in order to measure the areas under the glucose and insulin curve. The body weight was assessed the day before and the last day of treatment. The Li serum levels 15 hours after the last dose were 0.31 +/- 0.1 mEq/L. No significant changes in body weight and in the normal fluctuations of the reproductive hormones along the menstrual cycle were observed during Li administration. An increase in the serum levels of thyrotropic hormone ( p = 0.0001) was the only significant effect of Li, which may predispose to excessive weight gain after prolonged administration of the cation. The remarkable lack of effects of Li on these hormones, question the pertinence of studies conducted in healthy volunteers for the comprehension of the obesity observed in psychiatric patients who may be particularly prone to gain weight under prolonged treatment with high dose of Li.
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Rangel A, Basave M, Lavalle C, Hernández L, Ochoa J, Chávez E, Albarrán H. Endomyocardial fibrosis (Davies disease) coincidental with systemic lupus erythematosus. ARCHIVOS DEL INSTITUTO DE CARDIOLOGIA DE MEXICO 2000; 70:66-71. [PMID: 10855412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
This is the case of a 27 years-old woman with signs and symptoms of severe untreatable congestive heart failure, anemia, gingival mucosa ulcers, photosensitivity and alopecia. The electrocardiographic, echocardiographic, angiographic and hemodynamic data oriented the diagnosis of restrictive cardiomyopathy, mitral insufficiency secondary to mitral prolapse and bi-atrial dilation. The histologic study of the endomyocardial biopsy, performed during catheterization, showed signs of endomyocardial fibrosis, and immunological analysis was compatible with systemic lupus erythematosus. As far as we know, this is the first case of endomyocardial fibrosis (Davies disease) associated with systemic lupus erythematosus published in the medical literature. The etiology of Davies disease remains unrevealed and its association with systemic lupus erythematosus suggest a probable autoimmune origin.
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Lacruz A, Baptista T, de Mendoza S, Mendoza-Guillén JM, Hernández L. Antipsychotic drug-induced obesity in rats: correlation between leptin, insulin and body weight during sulpiride treatment. Mol Psychiatry 2000; 5:70-6. [PMID: 10673771 DOI: 10.1038/sj.mp.4000566] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Sulpiride (SUL, 20 mg kg-1 day-1) induces weight gain, hyperphagia, hyperprolactinemia, hypogonadism, and perhaps increased insulin sensitivity in rats. Leptin seems to signal the brain about the size of body fat stores and nutrient metabolism. We evaluated the basal serum leptin levels in rats after acute (1 h) or prolonged SUL or vehicle administration (10, 20 and 30 days). At days 10 and 30 leptin was also assessed during a glucose overload test. As the maximal weight gain during SUL administration is observed at days 10-15 of treatment, leptin was measured in a comparison group of insulin-treated rats (5 IU day-1 for 10 days). SUL-treated rats significantly gained weight. However, leptin levels were not significantly increased at any time-point of treatment. SUL did not affect insulin levels either. By contrast, leptin levels were significantly elevated after insulin administration, along with weight gain and hyperinsulinemia. An opposite correlation was also observed at day 10: leptin and insulin correlated negatively in the SUL group and positively in the insulin group. In addition, leptin and the magnitude of weight gain tended to correlate positively after SUL treatment, but negatively after insulin administration. SUL-treated rats, thus, appear to exhibit an unusual type of weight gain, characterized by normal circulating leptin and insulin levels. Such a particular leptin profile may be related to hyperprolactinemia, hypogonadism or lack of hyperinsulinemia. Molecular Psychiatry (2000) 5, 70-76.
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119
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Bermejo E, Zapardiel A, Pérez-López J, Chicharro M, Sánchez A, Hernández L. Electrochemical study of mefexamide at glassy-carbon electrodes and its determination in urine by differential pulse voltammetry. J Electroanal Chem (Lausanne) 2000. [DOI: 10.1016/s0022-0728(99)00478-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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120
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García Nieto V, Hernández L, Haddad JC, García Pérez J, Ramos P. [Experience of a renal function test unit]. Nefrologia 2000; 20:54-8. [PMID: 10822723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023] Open
Abstract
The activity developed during one year in a Renal Function Tests Unit was studied prospectively. Six hundred pharmacological tests (50 tests per month) were done to 453 patients, children and adults. Abnormal tests results were found in 38.4% of the patients. 49.7% of the tests were performed in patients affected with nephrolithiasis or carriers of metabolic anomalies predisposing to renal stones, mainly idiopathic hypercalciuria. The tests were also frequently done to other group of patients affected with urinary tract infection, mitochondrial disease, vesicoureteral reflux, osteoporosis and primary Sjögren's syndrome. The urinary concentrating capacity after desmopressin (37.2%) was the most frequent performed isolated test, although the group of tests to study the renal acidification capacity (58.5%) were the most frequent requested ones.
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Hernández L, Hernández S, Beà S, Pinyol M, Ferrer A, Bosch F, Nadal A, Fernández PL, Palacín A, Montserrat E, Campo E. c-myc mRNA expression and genomic alterations in mantle cell lymphomas and other nodal non-Hodgkin's lymphomas. Leukemia 1999; 13:2087-93. [PMID: 10602433 DOI: 10.1038/sj.leu.2401599] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Cyclin D1 is a weak oncogene that cooperates with c-myc activation in the development of B cell lymphomas in transgenic animals. Cyclin D1 is constantly overexpressed in human mantle cell lymphomas (MCL). However, the status of c-myc gene in these tumors is not known. We have examined the c-myc mRNA expression and genomic alterations, including mutational analysis of exon 1, intron 1, and exon 2 regulatory elements, in a series of 33 MCL, 22 typical and 11 blastoid variants. In addition, c-myc alterations were also examined in 56 nodal non-Hodgkin's lymphomas (NHL). c-myc mRNA overexpression was found in 38% (11/29) of MCL with a slightly higher frequency in blastoid variants (5/10, 50%) than in typical cases (6/19, 31%). Genetic alterations were only found in one blastoid MCL showing a three-fold c-myc gene amplification. In other nodal NHL, c-myc overexpression was found in 24% (7/29) of indolent tumors but in 70% (19/27) of aggressive variants. c-myc Genetic alterations detected in these cases were gene rearrangement and hypermutations in one Burkitt's lymphoma, and individual point mutations in intron 1 or exon 2 in 1/19 (5%) indolent and 7/16 (44%) aggressive variants. These results indicate that c-myc is overexpressed in a subset of MCL, but structural gene alterations are less frequent than in other nodal NHL.
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Badia JR, Farré RO, John Kimoff R, Ballester E, Hernández L, Rotger M, Navajas D, Montserrat JM. Clinical application of the forced oscillation technique for CPAP titration in the sleep apnea/hypopnea syndrome. Am J Respir Crit Care Med 1999; 160:1550-4. [PMID: 10556119 DOI: 10.1164/ajrccm.160.5.9902085] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
We have previously demonstrated that upper airway obstruction in sleep apnea/hypopnea syndrome (SAHS) can be accurately assessed in real-time by measuring respiratory impedance (|Z|) with the forced oscillation technique (FOT). The aims of the present study were: (1) to determine the feasibility of identifying the optimal continuous positive airway pressure (CPAP) for patients with SAHS based on analysis of the |Z| signal during conventional polysomnographic CPAP titration studies; and (2) to evaluate practical issues involved in the application of FOT during CPAP titration. We performed CPAP titration in 28 patients with SAHS during polysomnography (PSG) (14 nap and 14 full overnight studies) using a FOT system applied continuously to obtain an on-line measurement of |Z|. FOT was easily implemented and was well-tolerated by the patients. Optimal CPAP levels were determined both in the conventional manner from the standard PSG titration record and during a separate blinded analysis using the FOT signal alone. The mean conventional versus FOT-based optimal CPAP values were similar for both nap studies (10.6 +/- 0.6 [mean +/- SEM] versus 11.1 +/- 0.6 cm H(2)O, respectively, p = 0. 054) and overnight studies (9.9 +/- 0.7 versus 9.9 +/- 0.6 cm H(2)O, respectively, p = 1.00). Subsequent analysis of the PSG record with the FOT signal incorporated demonstrated that artefacts in the |Z| tracing occurred during mask leak, mouth breathing, and movement during arousal. Such abnormalities were readily identified from the flow tracing. These results indicate that, for adequate interpretation, the tracing and values of respiratory impedance obtained by FOT should be evaluated in conjunction with the flow signal. Continuous FOT-guided CPAP titration is feasible and may be a useful adjunct during manual titration. FOT could also potentially serve as the basis for automated CPAP in SAHS.
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Hernández L, Pinyol M, Hernández S, Beà S, Pulford K, Rosenwald A, Lamant L, Falini B, Ott G, Mason DY, Delsol G, Campo E. TRK-fused gene (TFG) is a new partner of ALK in anaplastic large cell lymphoma producing two structurally different TFG-ALK translocations. Blood 1999; 94:3265-8. [PMID: 10556217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023] Open
Abstract
Anaplastic large cell lymphoma (ALCL) is associated with the t(2;5)(p23;q35), which generates the NPM-ALK fusion gene encoding an 80-kD protein. Several studies have suggested that genes other than NPM may be fused to the ALK gene. Here we have identified TRK-fused gene (TFG) as a new ALK partner in 2 ALCL, 1 of which exhibited a t(2;3)(p23;q21). In these cases, TFG was involved in 2 different fusion genes, TFG-ALK(S) and TFG-ALK(L), coding respectively 85-kD and 97-kD chimeric proteins. The ALK breakpoint in these translocations was the same as in the classic t(2;5) translocation. These 2 proteins were both active in an in vitro tyrosine kinase assay showing that the new cloned cDNA sequences are translated into chimeric proteins with functional activity. These findings indicate that TFG can provide an alternative to NPM as a fusion partner responsible for activation of the ALK and the pathogenesis of ALCL.
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MESH Headings
- Adult
- Amino Acid Sequence
- Anaplastic Lymphoma Kinase
- Artificial Gene Fusion
- Base Sequence
- Chromosomes, Human, Pair 2
- Chromosomes, Human, Pair 5
- DNA, Neoplasm/genetics
- Humans
- Lymphoma, Large B-Cell, Diffuse/genetics
- Lymphoma, Large B-Cell, Diffuse/pathology
- Male
- Molecular Sequence Data
- Nuclear Proteins/genetics
- Nucleophosmin
- Protein-Tyrosine Kinases/genetics
- Receptor Protein-Tyrosine Kinases
- Recombinant Fusion Proteins/genetics
- Translocation, Genetic
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Arcelay A, Sánchez E, Hernández L, Inclán G, Bacigalupe M, Letona J, González RM, Martínez-Conde AE. Self-assessment of all the health centres of a public health service through the European Model of total quality management. INTERNATIONAL JOURNAL OF HEALTH CARE QUALITY ASSURANCE INCORPORATING LEADERSHIP IN HEALTH SERVICES 1999; 12:54-8. [PMID: 10537857 DOI: 10.1108/09526869910261268] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The Basque Country Public Health Service has moved in the last years from considering quality as an attribute of patient care to thinking that all management can be subject to improvement. Consequently, its general management team has promoted and supported a self-assessment experience of all their centres by means of the European Quality Model. This strategy has been facilitated by the Basque Country Government, which has strongly encouraged total quality management in companies, and has created the Basque Foundation for Quality Promotion, a key institution in this whole process. A total of 26 centres of the Public Health Service concluded a self-assessment process. As the main result of this, different improvement areas were detected, and various necessary actions were implemented in the centres assessed. Advantages, troubles and future work lines to extend and improve the use of the EFQM model in the health sector are discussed.
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