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Marín-Lahoz J, Martínez-Horta S, Sampedro F, Pagonabarraga J, Horta-Barba A, Bejr-Kasem H, Botí MÁ, Fernández-Bobadilla R, Pascual-Sedano B, Pérez-Pérez J, Aracil-Bolaños I, Gironell A, Gómez-Ansón B, Kulisevsky J. Measuring impulsivity in Parkinson's disease: a correlational and structural neuroimaging study using different tests. Eur J Neurol 2020; 27:1478-1486. [PMID: 32250513 DOI: 10.1111/ene.14235] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 03/12/2020] [Indexed: 12/21/2022]
Abstract
BACKGROUND AND PURPOSE Impulsivity is an aspect of personality and a major component of multiple neuropsychiatric conditions. In Parkinson's disease, it has been associated with the expression of impulse control disorders, a highly prevalent non-motor complication. Even though multiple tests of impulsivity have been used in this context, the impact of test choice has not been addressed. The aim was to evaluate whether different impulsivity measures in Parkinson's disease share substantial inter-scale and anatomical correlations or rather mirror different underlying phenomena. METHODS In a consecutive sample of 89 Parkinson's disease patients without impulse control disorders, four common tests were evaluated assessing different aspects of impulsivity: impulsiveness trait, decisions under implicit risk with and without losses, and delay discounting. Correlations among test scores were analysed and each score was used as a regressor in a set of grey matter volume (GMV) voxel-based morphometry analyses to explore their brain structural correlates. RESULTS No significant correlations were found between the different impulsivity tests. Furthermore, their structural brain correlates were divergent. Impulsiveness trait appeared to be associated with lower GMV in dorsal-lateral prefrontal cortices, implicit risk (with losses) with higher GMV in the left nucleus accumbens and lower left insular GMV, implicit risk (without losses) with higher GMV in the left lingual gyrus and lower GMV in the gyri recti and delay discounting with higher GMV in the left nucleus accumbens. CONCLUSIONS In Parkinson's disease, different impulsivity measures reflect very dissimilar behavioural and brain structural correlates. Our results suggest that parkinsonian impulsivity is not a unitary phenomenon but rather a heterogeneous entity.
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Affiliation(s)
- J Marín-Lahoz
- Movement Disorders Unit, Neurology Department, Sant Pau Hospital, Barcelona, Spain.,Institut d´Investigacions Biomèdiques-Sant Pau (IIB-Sant Pau), Barcelona, Spain.,Universitat Autònoma de Barcelona (U.A.B.), Barcelona, Spain.,Centro de Investigación en Red-Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - S Martínez-Horta
- Movement Disorders Unit, Neurology Department, Sant Pau Hospital, Barcelona, Spain.,Institut d´Investigacions Biomèdiques-Sant Pau (IIB-Sant Pau), Barcelona, Spain.,Centro de Investigación en Red-Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - F Sampedro
- Movement Disorders Unit, Neurology Department, Sant Pau Hospital, Barcelona, Spain.,Institut d´Investigacions Biomèdiques-Sant Pau (IIB-Sant Pau), Barcelona, Spain.,Centro de Investigación en Red-Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - J Pagonabarraga
- Movement Disorders Unit, Neurology Department, Sant Pau Hospital, Barcelona, Spain.,Institut d´Investigacions Biomèdiques-Sant Pau (IIB-Sant Pau), Barcelona, Spain.,Universitat Autònoma de Barcelona (U.A.B.), Barcelona, Spain.,Centro de Investigación en Red-Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - A Horta-Barba
- Movement Disorders Unit, Neurology Department, Sant Pau Hospital, Barcelona, Spain.,Institut d´Investigacions Biomèdiques-Sant Pau (IIB-Sant Pau), Barcelona, Spain.,Centro de Investigación en Red-Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - H Bejr-Kasem
- Movement Disorders Unit, Neurology Department, Sant Pau Hospital, Barcelona, Spain.,Institut d´Investigacions Biomèdiques-Sant Pau (IIB-Sant Pau), Barcelona, Spain.,Universitat Autònoma de Barcelona (U.A.B.), Barcelona, Spain.,Centro de Investigación en Red-Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain.,Universitat Oberta de Catalunya, Barcelona, Spain
| | - M Á Botí
- Universitat Oberta de Catalunya, Barcelona, Spain.,Asociació Catalana per al Parkinson, Barcelona, Spain
| | | | - B Pascual-Sedano
- Movement Disorders Unit, Neurology Department, Sant Pau Hospital, Barcelona, Spain.,Institut d´Investigacions Biomèdiques-Sant Pau (IIB-Sant Pau), Barcelona, Spain.,Centro de Investigación en Red-Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain.,Universitat Oberta de Catalunya, Barcelona, Spain
| | - J Pérez-Pérez
- Movement Disorders Unit, Neurology Department, Sant Pau Hospital, Barcelona, Spain.,Institut d´Investigacions Biomèdiques-Sant Pau (IIB-Sant Pau), Barcelona, Spain.,Centro de Investigación en Red-Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - I Aracil-Bolaños
- Movement Disorders Unit, Neurology Department, Sant Pau Hospital, Barcelona, Spain.,Institut d´Investigacions Biomèdiques-Sant Pau (IIB-Sant Pau), Barcelona, Spain.,Centro de Investigación en Red-Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - A Gironell
- Movement Disorders Unit, Neurology Department, Sant Pau Hospital, Barcelona, Spain.,Institut d´Investigacions Biomèdiques-Sant Pau (IIB-Sant Pau), Barcelona, Spain.,Centro de Investigación en Red-Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - B Gómez-Ansón
- Institut d´Investigacions Biomèdiques-Sant Pau (IIB-Sant Pau), Barcelona, Spain.,Universitat Autònoma de Barcelona (U.A.B.), Barcelona, Spain.,Neuroradiology Unit, Radiology Department, Sant Pau Hospital, Barcelona, Spain
| | - J Kulisevsky
- Movement Disorders Unit, Neurology Department, Sant Pau Hospital, Barcelona, Spain.,Institut d´Investigacions Biomèdiques-Sant Pau (IIB-Sant Pau), Barcelona, Spain.,Universitat Autònoma de Barcelona (U.A.B.), Barcelona, Spain.,Centro de Investigación en Red-Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
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López-Mora DA, Camacho V, Fernandez A, Fuentes F, Pérez-Pérez J, Carrio I. Value of 18F-FDG PET/CT in the diagnosis of chorea-acanthocytosis. Rev Esp Med Nucl Imagen Mol 2018; 37:328-329. [PMID: 29208484 DOI: 10.1016/j.remn.2017.11.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Revised: 11/14/2017] [Accepted: 11/14/2017] [Indexed: 11/24/2022]
Affiliation(s)
- D A López-Mora
- Servicio de Medicina Nuclear, Hospital de la Santa Creu i Sant Pau, Universidad Autónoma de Barcelona, Barcelona, España.
| | - V Camacho
- Servicio de Medicina Nuclear, Hospital de la Santa Creu i Sant Pau, Universidad Autónoma de Barcelona, Barcelona, España
| | - A Fernandez
- Servicio de Medicina Nuclear, Hospital de la Santa Creu i Sant Pau, Universidad Autónoma de Barcelona, Barcelona, España
| | - F Fuentes
- Servicio de Medicina Nuclear, Hospital de la Santa Creu i Sant Pau, Universidad Autónoma de Barcelona, Barcelona, España
| | - J Pérez-Pérez
- Unidad de Trastorno del Movimiento, Servicio de Neurología, Hospital de la Santa Creu i Sant Pau, Universidad Autónoma de Barcelona, Barcelona, España
| | - I Carrio
- Servicio de Medicina Nuclear, Hospital de la Santa Creu i Sant Pau, Universidad Autónoma de Barcelona, Barcelona, España
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3
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Bellosta Diago E, Pérez-Pérez J, Santos Lasaosa S, Viloria Alebesque A, Martínez-Horta S, Kulisevsky J, López Del Val J. Neurocardiovascular pathology in pre-manifest and early-stage Huntington's disease. Eur J Neurol 2018. [PMID: 29537687 DOI: 10.1111/ene.13630] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND AND PURPOSE Cardiovascular events are a major cause of early death in the Huntington's disease (HD) population. Dysautonomia as well as deterioration of circadian rhythms can be detected early in the disease progression and can have profound effects on cardiac health. The aim of the present study was to determine if patients with HD and pre-manifest mutation carriers present a higher risk of cardiovascular disease than non-mutation-carrying controls. METHODS This was a prospective, cross-sectional, multicentre study of 38 HD mutation carriers (23 pre-manifest and 15 early-stage patients) compared with 38 age- and gender-matched healthy controls. Clinical and epidemiological variables, including the main haematological vascular risk factors, were recorded. Ambulatory blood-pressure monitoring and carotid intima-media thickness (CIMT) measurement were performed to assess autonomic function and as target-organ damage markers. RESULTS Most (63.2%) patients with HD (86.7% and 47.8%, respectively, of the early-stage and pre-manifest patients) were non-dippers compared with 23.7% of controls (P = 0.001). CIMT values were in the 75th percentile in 46.7% and 43.5%, respectively, of the early-stage and pre-manifest patients, whereas none of the controls presented pathological values (P = 0.001 and P = 0.006, respectively). Nocturnal non-dipping was significantly associated with CIMT values in patients (P = 0.002) but not in controls. CONCLUSIONS These results suggest that higher cardiovascular risks and target-organ damage are present even in pre-manifest patients. Although larger studies are needed to confirm these findings, clinicians should consider these results in the cardiovascular management of patients with HD.
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Affiliation(s)
- E Bellosta Diago
- Neurology Department, Hospital Clínico Universitario Lozano Blesa, Zaragoza, Spain.,Resarch Group of Movement Disorders and Headache (GIIS070), Instituto de Investigación Sanitaria de Aragón (IIS-Aragón), Zaragoza, Spain
| | - J Pérez-Pérez
- Neurology Department, Movement Disorders Unit, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.,Biomedical Research Institute Sant Pau (IIB-Sant Pau), Barcelona, Spain.,Centro Investigación Biomedica en Red-Enfermedades Neurodegenerativas (CIBERNED), Barcelona, Spain
| | - S Santos Lasaosa
- Neurology Department, Hospital Clínico Universitario Lozano Blesa, Zaragoza, Spain.,Resarch Group of Movement Disorders and Headache (GIIS070), Instituto de Investigación Sanitaria de Aragón (IIS-Aragón), Zaragoza, Spain
| | - A Viloria Alebesque
- Neurology Department, Hospital Clínico Universitario Lozano Blesa, Zaragoza, Spain.,Resarch Group of Movement Disorders and Headache (GIIS070), Instituto de Investigación Sanitaria de Aragón (IIS-Aragón), Zaragoza, Spain
| | - S Martínez-Horta
- Neurology Department, Movement Disorders Unit, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.,Biomedical Research Institute Sant Pau (IIB-Sant Pau), Barcelona, Spain.,Centro Investigación Biomedica en Red-Enfermedades Neurodegenerativas (CIBERNED), Barcelona, Spain
| | - J Kulisevsky
- Neurology Department, Movement Disorders Unit, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.,Biomedical Research Institute Sant Pau (IIB-Sant Pau), Barcelona, Spain.,Centro Investigación Biomedica en Red-Enfermedades Neurodegenerativas (CIBERNED), Barcelona, Spain
| | - J López Del Val
- Neurology Department, Hospital Clínico Universitario Lozano Blesa, Zaragoza, Spain.,Resarch Group of Movement Disorders and Headache (GIIS070), Instituto de Investigación Sanitaria de Aragón (IIS-Aragón), Zaragoza, Spain
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Pérez-Diez C, Navarro H, De la Llama N, Pérez-Pérez J, Abad-Sazatornil M. CP-052 Chronic kidney disease: Dosage adjustment of epoetin β and darbepoetin α. Eur J Hosp Pharm 2016. [DOI: 10.1136/ejhpharm-2016-000875.52] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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5
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Matias-Guiu J, Fernández de Bobadilla R, Escudero G, Pérez-Pérez J, Cortés A, Morenas-Rodríguez E, Valles-Salgado M, Moreno-Ramos T, Kulisevsky J, Matías-Guiu J. Validación de la versión española del test Addenbrooke's Cognitive Examination III para el diagnóstico de demencia. Neurologia 2015; 30:545-51. [DOI: 10.1016/j.nrl.2014.05.004] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Revised: 05/09/2014] [Accepted: 05/18/2014] [Indexed: 12/22/2022] Open
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Matias-Guiu J, Fernández de Bobadilla R, Escudero G, Pérez-Pérez J, Cortés A, Morenas-Rodríguez E, Valles-Salgado M, Moreno-Ramos T, Kulisevsky J, Matías-Guiu J. Validation of the Spanish version of Addenbrooke's Cognitive Examination III for diagnosing dementia. Neurología (English Edition) 2015. [DOI: 10.1016/j.nrleng.2014.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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7
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Pérez Diez C, Navarro H, De la Llama N, Pérez-Pérez J, Navarro I, Abad M. CP-057 Dosage adjustment of epoetin β and darbepoetin α in chronic kidney disease. Eur J Hosp Pharm 2015. [DOI: 10.1136/ejhpharm-2015-000639.53] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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8
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Gómez-Tortosa E, Guerrero-López R, Gil-Neciga E, Franco E, del Ser T, Jiménez Escrig A, Pérez-Pérez J, Sainz MJ. Plasma progranulin levels in cortical dementia phenotypes with asymmetric perisylvian atrophy. Eur J Neurol 2013; 20:1319-24. [PMID: 23724906 DOI: 10.1111/ene.12211] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Accepted: 04/30/2013] [Indexed: 11/26/2022]
Abstract
BACKGROUND AND PURPOSE Decreased plasma progranulin levels are a very specific marker for the diagnosis of frontotemporal lobar degeneration (FTLD) caused by mutations in the progranulin gene (GRN). A frequent neuroimaging pattern in this type of dementia is asymmetric cortical atrophy. The aim of this study was to screen for GRN-linked FTLD in cases with different cortical dementia phenotypes and asymmetric perisylvian atrophy. METHODS Progranulin plasma levels were analyzed in a variety of FTLD phenotypes (n = 71), dementia of the Alzheimer type (DAT) (n = 22) and probable Lewy body dementia (n = 8), both latter groups presented with asymmetric perisylvian atrophy. A group of elderly controls (n = 29) and DAT cases with symmetric atrophy (n = 33) were also analyzed. The GRN gene was sequenced in cases with lower plasma levels. RESULTS Four cases with clinical FTLD phenotypes and plasma levels below 70 ng/ml were found to carry different GRN mutations: M1?, C139R, a point mutation in the splice donor site of intron 3 (A89VfsX41), and a deletion in exon 9 (A303AfsX57), this latter one being a new mutation. Thirteen cases with levels between 72 and 85 ng/ml did not show pathogenic changes in the GRN gene. None of the cases with asymmetric atrophy and clinical phenotypes other than FTLD had GRN mutations. CONCLUSIONS Asymmetric perisylvian atrophy is not likely to predict progranulin-linked FTLD unless it is associated with a consistent FTLD clinical phenotype.
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Affiliation(s)
- E Gómez-Tortosa
- Department of Neurology, Fundación Jiménez Díaz, Madrid, Spain.
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9
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Martínez-Formoso S, Portillo-Díez J, Ramos-Ríos R, Alonso-San Gregorio J, Pérez-Pérez J, Páramo-Fernández M. P03-91 - Descriptive study of consecutive admissions of patients with delusional disorder. Eur Psychiatry 2010. [DOI: 10.1016/s0924-9338(10)71201-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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10
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Romero P, Navarro JM, Pérez-Pérez J, García-Sánchez F, Gómez-Gómez A, Porras I, Martinez V, Botía P. Deficit irrigation and rootstock: their effects on water relations, vegetative development, yield, fruit quality and mineral nutrition of Clemenules mandarin. Tree Physiol 2006; 26:1537-48. [PMID: 17169893 DOI: 10.1093/treephys/26.12.1537] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Differences between rootstocks, 'Cleopatra' mandarin and 'Carrizo' citrange, in soil-plant water relations and the influence of these factors on vigor, crop yield, fruit quality and mineral nutrition were evaluated in field-grown Clemenules mandarin trees irrigated at 100% of potential seasonal evaporation (ET(c)) (control treatment), or irrigated at 100% ET(c), except during Phases I and III of fruit growth and post-harvest when no irrigation was applied (deficit irrigation (DI) treatment), for 3 years. Differences between rootstocks in plant-soil water relations were the primary cause of differences among trees in vegetative development and fruit yield. After 3 years of DI treatment, trees on 'Cleopatra' showed more efficient soil water extraction than trees on 'Carrizo', and maintained a higher plant water status, a higher gas exchange rate during periods of water stress and achieved faster recovery in gas exchange following irrigation after water stress. The DI treatment reduced vegetative development more in trees on 'Carrizo' than in trees on 'Cleopatra'. Cumulative fruit yield decreased more in DI trees on 'Carrizo' (40%) than on 'Cleopatra' (27%). The yield component most affected by DI in 'Cleopatra' was the number of fruit, whereas in 'Carrizo' it depended on the severity of water stress reached in each phase (severe water stress in Phase I affected mainly the number of fruit, whereas it affected fruit size the most in Phase III). In the third year of DI treatment, water-use efficiency decreased sharply in trees on 'Carrizo' (70%) compared to trees on 'Cleopatra' (30%). Thus, trees on 'Cleopatra' were able to tolerate moderate water stress, whereas trees on 'Carrizo' were more sensitive to changes in soil water content.
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Affiliation(s)
- P Romero
- Department of Citriculture, IMIDA, 30150 La Alberca, Murcia, Spain
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11
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Pérez-Pérez J, Sosa AM, González-Casanova S. [The knowledge, clinical control and attitudes of Primary Care physicians when dealing with epileptic patients. Preliminary findings]. Rev Neurol 2005; 40:385-93. [PMID: 15849670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
INTRODUCTION Epilepsy is a common disease with important social and economic repercussions. Patients with epilepsy have traditionally been discriminated by both the general population and physicians. A physician's lack of knowledge about epilepsy could be the cause of an incorrect clinical control (CC). AIMS The purpose of this study is to examine the origins of the knowledge, the CC and the attitudes of physicians in Tenerife with respect to the treatment of patients with epilepsy. MATERIALS AND METHODS In January 2003, all Primary Care physicians in Tenerife were given a questionnaire that asked them about their knowledge, CC and attitudes when dealing with cases of epilepsy. Of the 260 surveys initially sent out, 182 were returned. RESULTS The questionnaire was answered by 70% of doctors, of which 34 were paediatricians and 148 were general practitioners, with no differences between sexes. Most physicians acquire their knowledge, observe and treat their first seizure in the Faculty and during their period of hospital residency. 44% of them are barely or not at all satisfied with their knowledge on the subject. The most highly valued therapists are neurologists and neuropaediatricians. The goal that is sought is to eliminate the impact of the disease on the patient's quality of life. They rarely establish or modify antiepileptic treatment and state that they have doubts about neuropsychological disorders and integrating patients with epilepsy in the workplace. CONCLUSIONS The physicians in Tenerife define themselves as professionals with scant knowledge about epilepsy and feel they are poorly qualified to treat patients with the disease, who are usually referred to specialists in Neurology.
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Affiliation(s)
- J Pérez-Pérez
- Servicio de Pediatría, Hospital Universitario de Canarias, La Laguna, Santa Cruz de Tenerife, Spain.
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Pérez-Pérez J, Fernández-Caldas E, Marañón F, Sastre J, Bernal ML, Rodríguez J, Bedate CA. Molecular cloning of paramyosin, a new allergen of Anisakis simplex. Int Arch Allergy Immunol 2000; 123:120-9. [PMID: 11060483 DOI: 10.1159/000024442] [Citation(s) in RCA: 68] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Anisakis simplex is a fish parasite that, when accidentally ingested by humans, may cause allergic reactions in sensitized individuals. The main objectives of our study were to: (1) construct a cDNA expression library of A. simplex; (2) identify clones producing specific IgE binding protein antigens, and (3) produce and purify the protein/s codified by the isolated clones produced in Escherichia coli. METHODS An expression cDNA library from the third stage larvae (L3) of A. simplex was constructed. This library was first screened with a rabbit anti A. simplex hyperimmune serum. The positive clones, identified using the rabbit serum, were rescreened with a pool of human sera containing high titers of IgE antibodies against A. simplex. RESULTS Two positive clones were isolated carrying the genes which codify for paramyosin. The paramyosin protein was produced in E. coli and purified. The partial sequence of a second paramyosin gene was also identified. The frequency of specific IgE binding to the recombinant and native forms of paramyosin using the sera of 26 A. simplex-sensitive individuals was 23 and 88%, respectively. Both paramyosins were able to inhibit 11% of the specific IgE binding to a total extract. CONCLUSIONS We describe the primary structure of a paramyosin of A. simplex. It can be considered as an allergen based on its IgE binding capacity. We suggest that the recombinant protein does not maintain the complete allergenic properties of the native paramyosin, considering its lower IgE binding capacity of the recombinant protein. However, both proteins have the same specific IgE inhibition capacity. The recombinant protein can be produced in large quantities in E. coli. We propose the term Ani s 2 for this allergen.
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Affiliation(s)
- J Pérez-Pérez
- CBF LETI, SA, Research Laboratories, Universidad Autónoma de Madrid, Spain
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13
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Galán A, Llorca O, Valpuesta JM, Pérez-Pérez J, Carrascosa JL, Menéndez M, Bañuelos S, Muga A. ATP hydrolysis induces an intermediate conformational state in GroEL. Eur J Biochem 1999; 259:347-55. [PMID: 9914513 DOI: 10.1046/j.1432-1327.1999.00045.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The conformational properties of the molecular chaperone GroEL in the presence of ATP, its non-hydrolyzable analog 5'-adenylimidodiphosphate (AMP-PNP), and ADP have been analyzed by differential scanning calorimetry (DSC), Fourier-transform infra-red (FT-IR) and fluorescence spectroscopy. Nucleotide binding to one ring promotes a decrease in the Tm value of the GroEL thermal transition that is reversed when both rings are filled with nucleotide, indicating that the sequential occupation of the two protein rings by these nucleotides has different effects on the GroEL thermal denaturation process. In addition, ATP induces a conformational change in GroEL characterized by (a) the appearance of a reversible low temperature endotherm in the DSC profiles of the protein, and (b) an enhanced binding of the hydrophobic probe 8-anilino-naphthalene-1-sulfonate (ANS), which strictly depends on ATP hydrolysis. The similar sensitivity to K+ of the temperature range where activation of the GroEL ATPase activity, the low temperature endotherm, and the increase of the ANS fluorescence are abserved strongly indicates the existence of a conformational state of GroEL during ATP hydrolysis, different from that generated on ADP or AMP-PNP binding. To achieve this intermediate conformation, GroEL mainly modifies its tertiary and quaternary structures, leading to an increased exposure of hydrophobic surfaces, with minor rearrangements of its secondary structure.
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Affiliation(s)
- A Galán
- Department de Bioquímica y Biología Molecular, Unidad asociada al CSIC, Universidad del París Vaco, Bilbao, Spain
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14
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Pérez-Pérez J, Barragán C. Isolation of four pig male-specific DNA fragments by RDA. Anim Genet 1998; 29:157-8. [PMID: 9699287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- J Pérez-Pérez
- Centro de Investigación y Tecnología, Instituto Nacional de Investigaciones Agrarias, Madrid, Spain.
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Llorca O, Pérez-Pérez J, Carrascosa JL, Galán A, Muga A, Valpuesta JM. Effects of the inter-ring communication in GroEL structural and functional asymmetry. J Biol Chem 1997; 272:32925-32. [PMID: 9407071 DOI: 10.1074/jbc.272.52.32925] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The chaperonin GroEL consists of a double-ring structure that assists protein folding in the presence of GroES and ATP. Recent studies suggest that the 7-mer ring is the functional unit where protein folding takes place. Nevertheless, both GroEL rings are required to complete the reaction cycle through signals transmitted between the two rings. Electron microscopy, image processing, and biochemical analysis of GroEL, a single-ring mutant (SR1) and a inter-ring communication affected mutant (A126V), in the presence of ATP and adenylyl imidodiphosphate, have allowed the identification of a conformational change in the apical domains that is strictly dependent on the communication between the two GroEL rings. It is deduced from these results that the binding of nucleotide to both GroEL rings generates, as a consequence of the inter-ring communication, a functionally and structurally asymmetric particle. This asymmetric particle has a ring with a small conformational change in its apical domains and high affinity toward unfolded substrate and GroES, and the other ring has a larger conformational change in its apical domains and lower affinity toward substrate and GroES.
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Affiliation(s)
- O Llorca
- Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Cientificas, Campus Universidad Autónoma de Madrid, 28049 Madrid, Spain
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Pérez-Pérez J, Barbero JL, Márquez G, Gutiérrez J. Different PrlA proteins increase the efficiency of periplasmic production of human interleukin-6 in Escherichia coli. J Biotechnol 1996; 49:245-7. [PMID: 8879175 DOI: 10.1016/0168-1656(96)83990-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The export efficiency of a fusion of the Escherichia coli preOmpA signal peptide to human interleukin-6 can be significantly raised by coexpressing three different prlA alleles of sec Y along with wild type secE. The effect seems prlA-specific, as prlG1 (a prl allele of secE) does not affect the export of preOmpA-hIL-6. Coexpression of secD and secF also stimulates the export of the fusion protein.
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Affiliation(s)
- J Pérez-Pérez
- Departamento de Investigación, Pharmacia and Upjohn, Antonio López, Madrid, Spain
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Abstract
Arabinose-inducible genetic elements from the Salmonella typhimurium arabinose operon were inserted into pACYC184. The resultant plasmid, pAR3, is compatible with ColE1-derived plasmids and allows efficient expression of recombinant (re) genes upon induction with arabinose. These features make it convenient for use in combination with standard gene expression vectors for the independently controlled production of two or more re-polypeptides in Escherichia coli.
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Affiliation(s)
- J Pérez-Pérez
- Departamento de Investigación, Pharmacia Antibióticos Farma S.A., Madrid, Spain
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Pérez-Pérez J, Martínez-Caja C, Barbero JL, Gutiérrez J. DnaK/DnaJ supplementation improves the periplasmic production of human granulocyte-colony stimulating factor in Escherichia coli. Biochem Biophys Res Commun 1995; 210:524-9. [PMID: 7538761 DOI: 10.1006/bbrc.1995.1691] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Human granulocyte-colony stimulating factor (hG-CSF) can be efficiently synthesized in E. coli as a fusion to a quimeric signal peptide, but this fusion is only partially exported to the periplasm. We have studied the effects of supplementing the host content in chaperonins on the secretion of prehG-CSF in E. coli. We have found that the DnaK/DnaJ chaperonin system improves the secretion of this recombinant protein. This improvement correlates with an increase in the solubility of the precursor. Only a small fraction of the mature protein is released from the periplasm by an osmotic shock.
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Affiliation(s)
- J Pérez-Pérez
- Departamento de Investigación, Pharmacia Antibióticos Farma S. A., Madrid, Spain
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Abstract
Export of recombinant proteins to the periplasm of Escherichia coli is in many cases preferable to cytoplasmic production. However, when the protein is overexpressed, export efficiency decreases significantly and some advantages of the system are lost. This is what happens when attempting to produce recombinant human interleukin-6 (hIL-6) as a pre(OmpA) fusion in E. coli. Assuming that the host protein export machinery becomes overloaded, we have tested the effect of providing the host with additional copies of two key components of that machinery. Supplementation with a plasmid bearing prlA4 (secY allele) and secE genes increased the ratio of mature to precursor hIL-6 from 1.2 to 10.8. The increase in processing ratio was associated with the accumulation of a larger amount of total (mature plus precursor forms) hIL-6. Providing a plasmid-borne wild-type prlA was ineffective compared to prlA4 allele. This suggests that the PrlA protein, a component of the translocator, recognizes features at the mature portion of secretory substrates independently of those at the signal peptide portion.
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Affiliation(s)
- J Pérez-Pérez
- Research Department, Antibióticos Farma S.A. Antonio López, Madrid, Spain
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