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Articles by A Bilbao
Total Records ( 3 ) for A Bilbao
  J Mutschler , A Bilbao , C von der Goltz , C Demiralay , H Jahn , K Wiedemann , R Spanagel and F. Kiefer
 

Aims: Preclinical and clinical data suggest an involvement of atrial natriuretic peptides (ANP) in alcohol-associated psychopathology. We now present first data on alcohol drinking behaviour in mice lacking a functional natriuretic peptide-A (NPR-A) receptor. Methods: NPR-A–/– and wild-type mice were given a free choice between water and increasing concentrations of alcohol (2–16%). A forced swim stress was performed thereafter on three consecutive days to investigate stress-induced alcohol drinking. Additionally, neurobehavioural alcohol withdrawal response was investigated following 14 days of forced-alcohol intake. Results: Whereas basal alcohol intake did not differ between NPR-A mutants and wild-type littermates, NPR-A mutants showed an increased stress-induced alcohol intake and aggravated neurobehavioural symptoms of alcohol withdrawal. Conclusions: Mice lacking a functional NPR-A receptor represent a useful model to study the role of the ANP system in alcohol-associated pathology. To study the role of the natriuretic NPR-A gene for the modulation of risk of alcohol-related disorders, NPR-A-related polymorphisms should be targeted in clinical studies.

  N. P Castellanos , N Paul , V. E Ordonez , O Demuynck , R Bajo , P Campo , A Bilbao , T Ortiz , F del Pozo and F. Maestu
 

Cognitive processes require a functional interaction between specialized multiple, local and remote brain regions. Although these interactions can be strongly altered by an acquired brain injury, brain plasticity allows network reorganization to be principally responsible for recovery. The present work evaluates the impact of brain injury on functional connectivity patterns. Networks were calculated from resting-state magnetoencephalographic recordings from 15 brain injured patients and 14 healthy controls by means of wavelet coherence in standard frequency bands. We compared the parameters defining the network, such as number and strength of interactions as well as their topology, in controls and patients for two conditions: following a traumatic brain injury and after a rehabilitation treatment. A loss of delta- and theta-based connectivity and conversely an increase in alpha- and beta-band-based connectivity were found. Furthermore, connectivity parameters approached controls in all frequency bands, especially in slow-wave bands. A correlation between network reorganization and cognitive recovery was found: the reduction of delta-band-based connections and the increment of those based on alpha band correlated with Verbal Fluency scores, as well as Perceptual Organization and Working Memory Indexes, respectively. Additionally, changes in connectivity values based on theta and beta bands correlated with the Patient Competency Rating Scale. The current study provides new evidence of the neurophysiological mechanisms underlying neuronal plasticity processes after brain injury, and suggests that these changes are related with observed changes at the behavioural level.

  P. P. E Yandiola , A Capelastegui , J Quintana , R Diez , I Gorordo , A Bilbao , R Zalacain , R Menendez and A. Torres
  Background:

The comparative accuracy and discriminatory power of three validated rules for predicting clinically relevant outcomes other than mortality in patients hospitalized with community-acquired pneumonia (CAP) are unknown.

Methods:

We prospectively compared the newly developed severe community-acquired pneumonia (SCAP) score, pneumonia severity index (PSI), and the British Thoracic Society confusion, urea > 7 mmol/L, respiratory rate ≥ 30 breaths/min, BP < 90 mm Hg systolic or < 60 mm Hg diastolic, age ≥ 65 years (CURB-65) rule in an internal validation cohort of 1,189 consecutive adult inpatients with CAP from one hospital and an external validation cohort of 671 consecutive adult inpatients from three other hospitals. Major adverse outcomes were admission to ICU, need for mechanical ventilation, progression to severe sepsis, or treatment failure. Mean hospital length of stay (LOS) was also evaluated. The rules were compared based on sensitivity, specificity, and area under the curve (AUC) of the receiver operating characteristic.

Results:

The rate of all adverse outcomes and hospital LOS increased directly with increasing SCAP, PSI, or CURB-65 scores (p < 0.001) in both cohorts. Patients classified as high risk by the SCAP score showed higher rates of adverse outcomes (ICU admission, 35.8%; mechanical ventilation, 16.4%; severe sepsis, 98.5%; treatment failure, 22.4%) than PSI and CURB-65 high-risk classes. The discriminatory power of SCAP, as measured by AUC, was 0.75 for ICU admission, 0.76 for mechanical ventilation, 0.79 for severe sepsis, and 0.61 for treatment failure in the external validation cohort. AUC differences with PSI or CURB-65 were found.

Conclusions:

The SCAP score is as accurate or better than other current scoring systems in predicting adverse outcomes in patients hospitalized with CAP while helping classify patients into different categories of increasing risk for potentially closer monitoring.

 
 
 
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