669 results match your criteria: "de la Universitat de Barcelona[Affiliation]"

Walking or hanging: the role of habitat use for body shape evolution in lacertid lizards.

J Evol Biol

January 2025

Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals de la Universitat de Barcelona (BEECA), Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona.

Differences in habitat use impose ecological constraints which in turn lead to functional and morphological differences through adaptation. In fact, a convergent evolutionary pattern is evident when species exhibit similar responses to similar environments. In this study we examine how habitat use influences the evolution of body shape in lizards from the family Lacertidae.

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Multi-omics profiling reveals altered mitochondrial metabolism in adipose tissue from patients with metabolic dysfunction-associated steatohepatitis.

EBioMedicine

January 2025

Unitat de Recerca Biomèdica, Hospital Universitari de Sant Joan, Universitat Rovira i Virgili, Institut d'Investigació Sanitària Pere Virgili, Reus, Spain; Department of Medicine and Surgery, Faculty of Medicine, Universitat Rovira i Virgili, Reus, Spain; The Campus of International Excellence Southern Catalonia, Tarragona, Spain. Electronic address:

Background: Metabolic dysfunction-associated steatotic liver disease (MASLD) and its more severe form steatohepatitis (MASH) contribute to rising morbidity and mortality rates. The storage of fat in humans is closely associated with these diseases' progression. Thus, adipose tissue metabolic homeostasis could be key in both the onset and progression of MASH.

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Article Synopsis
  • Chimpanzees exhibit advanced spatiotemporal cognition by using memory to locate and revisit underground army ant nests, showing they can track both spatial locations and the timing of food availability.
  • Over a five-year study (2018-2022) using camera traps, researchers observed 679 visits to these nests and found that many chimps returned to the nests more frequently than to sites without ants.
  • The study indicates that chimpanzees utilize various senses and tools to detect ants, providing new insights into their cognitive strategies for foraging and suggesting that such behaviors may influence the evolution of cognition in primates.
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The dual GLP-1/glucagon receptor agonist G49 mimics bariatric surgery effects by inducing metabolic rewiring and inter-organ crosstalk.

Nat Commun

November 2024

Instituto de Investigaciones Biomédicas Sols-Morreale (IIBM), Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid, Madrid, Spain.

Bariatric surgery is effective for the treatment and remission of obesity and type 2 diabetes, but pharmacological approaches which exert similar metabolic adaptations are needed to avoid post-surgical complications. Here we show how G49, an oxyntomodulin (OXM) analog and dual glucagon/glucagon-like peptide-1 receptor (GCGR/GLP-1R) agonist, triggers an inter-organ crosstalk between adipose tissue, pancreas, and liver which is initiated by a rapid release of free fatty acids (FFAs) by white adipose tissue (WAT) in a GCGR-dependent manner. This interactome leads to elevations in adiponectin and fibroblast growth factor 21 (FGF21), causing WAT beiging, brown adipose tissue (BAT) activation, increased energy expenditure (EE) and weight loss.

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The planarian Schmidtea mediterranea shows nutrient-dependent whole-body plasticity. Starvation leads to body size reduction, while feeding triggers growth. The balance of cell proliferation and cell death controls cell number, driving organismal body size.

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To explore the anatomical factors potentially involved in the high incidence of carpal tunnel syndrome in humans, we have quantified the anatomical variations of the carpal tunnel and its inner structures in humans, non-hominoid primates (monkeys), and hominoid primates (apes). In specimens of six humans, eight monkeys, and three apes, we assessed the size of the carpal tunnel, the tendons of the digit flexor muscles, and the median nerve. We compared the size of the carpal tunnel normalized by the wrist size, and the size of the median nerve and the tendons of the digit flexors normalized by the size of the carpal tunnel.

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Editorial: Novel regulatory mechanisms behind thermogenesis of brown and beige adipocytes, volume II.

Front Endocrinol (Lausanne)

October 2024

Departament de Bioquímica i Biomedicina Molecular, Universitat de Barcelona, Institut de Biomedicina de la Universitat de Barcelona (IBUB), and Institut de Recerca de Sant Joan de Déu, Barcelona, Spain.

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Impact of Collaborative Nursing Care on Health Outcomes of Mental Health Day Hospital Users: A Mixed Methods Study.

J Psychiatr Ment Health Nurs

November 2024

Departament d'Infermeria de Salut Pública, Salut Mental i Maternoinfantil, Facultat d'Infermeria, Universitat de Barcelona, Barcelona, Spain.

Introduction: Given that recovery-oriented care focuses on empowering individuals with mental health challenges, collaborative care can be an effective tool for nurses in mental health day hospitals.

Aim: To deepen knowledge about the impact of collaborative nursing care for improving health outcomes of mental health day hospital users.

Methods: A sequential and transformative mixed methods study was designed.

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Neuregulin 4 (Nrg4) is an adipokine that belongs to the epidermal growth factor family and binds to ErbB4 tyrosine kinase receptors. In 3T3-L1 adipocytes, the downregulation of expression enhances inflammation and autophagy, resulting in insulin resistance. Here, we searched for the causes of this phenotype.

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A Fast Method to Monitor Tyrosine Kinase Inhibitor Mechanisms.

J Med Chem

November 2024

Biomolecular NMR Laboratory, Departament de Química Inorgànica i Orgànica, Universitat de Barcelona (UB), Baldiri Reixac 10-12, 08028 Barcelona. Spain.

Methionine residues within the kinase domain of Src serve as unique NMR probes capable of distinguishing between distinct conformational states of full-length Src, including alternative drug-inhibited forms. This approach offers a rapid method to differentiate between various inhibition mechanisms at any stage of drug development, eliminating the need to resolve the structure of Src-drug complexes. Using selectively C-methyl-enriched methionine, spectra can be acquired in under an hour, while natural abundance spectra with comparable information are achievable within a few hours.

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Functional annotation and interpretation of genetic variants are a critical step in genetic diagnosis, as it may lead to personalized therapeutic options and genetic counseling. While the number of confirmed pathogenic genetic variants in an individual is relatively low, the number of variants of uncertain significance (VOUS) can be considerably higher, increasing the number of potential carriers of genetic disorders. Thus, reducing uncertainty and assessing the real effect of VOUS are crucial for clinical and medical genetics.

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In several species of hominid primates with different types of locomotor behavior, we quantitatively studied the insertion sites of the brachialis and triceps brachii on the proximal epiphysis of the ulna. Our main objective was to evaluate the possibility of using the anatomical features of these insertion sites to infer the locomotor behavior of different species of fossil hominins. We measured the area of these muscle insertion sites using 3D bone meshes and obtained the value of each insertion site relative to the total size of the two insertion sites for each of the species studied.

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Article Synopsis
  • RBFOX1 plays a key role in regulating transcriptional networks involved in synaptic transmission and neurodevelopment, impacting psychiatric disorder vulnerability.
  • Dysfunction of RBFOX1 affects the alternative splicing of PAC1 and disrupts the BDNF/TrkB pathway, which is vital for neuroplasticity and resilience to stress.
  • Using a zebrafish model, researchers found that RBFOX1 loss of function leads to hyperactivity and other behavioral issues, highlighting its crucial role in HPA axis regulation during development and its potential link to psychiatric disorders.
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Obesity and type 2 diabetes (T2D) are widespread metabolic disorders that significantly impact global health today, affecting approximately 17% of adults worldwide with obesity and 9.3% with T2D. Both conditions are closely linked to disruptions in lipid metabolism, where peroxisomes play a pivotal role.

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H3K9me3 demethylation by JMJD2B is regulated by pirfenidone resulting in improved NASH.

Sci Rep

October 2024

Department of Molecular Biology and Genomics, Institute for Molecular Biology in Medicine and Gene Therapy, Health Sciences University Center, University of Guadalajara, 44340, Guadalajara, Jalisco, Mexico.

NASH is characterized by hepatic lipid accumulation and inflammation; and JMJD2B-a histone demethylase-upregulation has been linked to its progression. Pirfenidone (PFD) is an antifibrotic agent with anti-inflammatory and antioxidant effects recognized to decrease NASH symptoms. Herein, our aim was to investigate PFD-induced epigenetics mechanisms involving JMJD2B and histone modifications in experimental NASH.

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NRN1 genetic variability and methylation changes as biomarkers for cognitive remediation therapy response in schizophrenia.

Prog Neuropsychopharmacol Biol Psychiatry

January 2025

FIDMAG Germanes Hospitalàries Research Foundation, Barcelona, Spain; Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Spain; Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain. Electronic address:

Cognitive remediation therapy (CRT) demonstrates potential in enhancing cognitive function in schizophrenia (SZ), though the identification of molecular biomarkers remains challenging. The Neuritin-1 gene (NRN1) emerges as a promising candidate gene due to its association with SZ, cognitive performance and response to neurotherapeutic treatments. We aimed to investigate whether NRN1 genetic variability and methylation changes following CRT are related to cognitive improvements.

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Family of Quasi-Isotropic Mn and Mn Complexes Exhibiting Slow Relaxation of the Magnetization.

Inorg Chem

October 2024

Departament de Química Inorgànica i Orgànica, Secció Inorgànica and Institute of Nanoscience and Nanotecnology, Universitat de Barcelona, Marti i Franques 1-11, Barcelona 08028, Spain.

Slow relaxation of magnetization has been studied for a family of mononuclear Mn complexes and one ferromagnetic dinuclear system, all of them presenting very weak anisotropy. Complexes with formula [{NiL1Mn(HO)(MeOH)}{NiL1}](ClO) (), [Mn{NiL1}](ClO) (), [Mn{NiL2}](ClO) (RR-L2, RR, SS-L2, SS), [Mn{NiL3}](ClO) (RR-L3, RR, SS-L3, SS) and (μ-N)[NiMn(L1)(N)] () are derived from compartmental Schiff bases, in which the Ni environment is square planar and thus diamagnetic. All of the systems have been structurally and magnetically characterized.

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Multi-omics profiling of DNA methylation and gene expression alterations in human cocaine use disorder.

Transl Psychiatry

October 2024

Department of Genetic Epidemiology in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany.

Article Synopsis
  • Structural and functional changes in the brain are linked to cocaine use disorder (CUD), with epigenetic and transcriptional alterations serving as potential molecular causes for these changes.
  • A study analyzing brain tissue from individuals with CUD identified significant differences in gene expression, particularly highlighting an upregulation of the gene ZFAND2A and changes in alternative splicing that affect neuron pathways.
  • The findings suggest important biological processes like synaptic signaling and neuron morphogenesis are disrupted in CUD, and propose that drugs targeting glucocorticoid receptors could help reverse these expression changes.
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Sex-specific association between schizophrenia polygenic risk and subclinical schizophrenia-related traits.

Prog Neuropsychopharmacol Biol Psychiatry

January 2025

Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain; Institut de Biomedicina de la Universitat de Barcelona (IBUB), Barcelona, Spain; Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Instituto de Salud Carlos III (ISCIII), Madrid, Spain. Electronic address:

Background: According to the dimensional view of psychiatric disorders, psychosis is expressed as a continuum in the general population. However, the investigation of the putative genetic aetiological continuity between its clinical and subclinical phenotypes has yielded mixed results. We aimed to replicate previous findings regarding the association of polygenic risk for schizophrenia with subclinical traits (i.

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Cancer cachexia manifests as whole body wasting, however, the precise mechanisms governing the alterations in skeletal muscle and cardiac anabolism have yet to be fully elucidated. In this study, we explored changes in anabolic processes in both skeletal and cardiac muscles in the Yoshida AH-130 ascites hepatoma model of cancer cachexia. AH-130 tumor-bearing rats experienced significant losses in body weight, skeletal muscle, and heart mass.

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PepT1, a proton-coupled oligopeptide transporter, is crucial for intestinal homeostasis. It is mainly expressed in small intestine enterocytes, facilitating the absorption of di/tri-peptides from dietary proteins. In the colon, PepT1 expression is minimal to prevent excessive responses to proinflammatory peptides from the gut microbiota.

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The Role of Water Networks in Phosphodiesterase Inhibitor Dissociation and Kinetic Selectivity.

ChemMedChem

November 2024

Division of Medicinal Chemistry, Amsterdam Institute of Molecular and Life Sciences (AIMMS), Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ, Amsterdam, The Netherlands.

In search of new opportunities to develop Trypanosoma brucei phosphodiesterase B1 (TbrPDEB1) inhibitors that have selectivity over the off-target human PDE4 (hPDE4), different stages of a fragment-growing campaign were studied using a variety of biochemical, structural, thermodynamic, and kinetic binding assays. Remarkable differences in binding kinetics were identified and this kinetic selectivity was explored with computational methods, including molecular dynamics and interaction fingerprint analyses. These studies indicate that a key hydrogen bond between Gln and the inhibitors is exposed to a water channel in TbrPDEB1, leading to fast unbinding.

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No Switching Cooperativity between Coordinated Azo Ligands on Complexes Having {M(phosphane-κ)} (M = Pd, Pt) Scaffolds.

Inorg Chem

September 2024

Secció de Química Inorgànica, Departament de Química Inorgànica i Orgànica, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain.

A series of square-planar palladium and platinum compounds with -blocking phosphanes and terminal azobenzene ligands [M(dppp)(azo)](OTf) (azo = CN(CH)-N═N-(CH)CN (), CN(CH)-N═N-(CH) ()) and [{M(tpbz)}(azo)](OTf) (azo = CN(CH)-N═N-(CH) ()) have been synthesized and fully characterized. Similarly to the uncoordinated ligands, the new coordination compounds have shown to be photochemically active with respect to their trans-to-cis isomerization process. Their cis-to-trans back spontaneous reaction have been studied as a function of solvent, temperature and pressure and the corresponding activation parameters determined in order to investigate the mechanism of these transformations.

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Dinuclear enantiopure Ln complexes with (-) and (-) 2-phenylbutyrate ligands. Luminescence, CPL and magnetic properties.

Dalton Trans

August 2024

Departament de Química Inorgànica i Orgànica, Secció de Química Inorgànica, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain.

The reaction of Ln(NO)·6HO (Ln = Nd, Sm, Eu, Tb, Dy, Tm and Yb) with the respective enantiopure ()-(-)-2-phenylbutyric or ()-(+)-2-phenylbutyric acid (/-2-HPhBut) and 4,7-diphenyl-1,10-phenanthroline (Bphen) allows the isolation of chiral dinuclear compounds of the formula [Ln(μ-/-2-PhBut)(/-2PhBut)(Bphen)] where Ln = Nd (R/S-Nd-a), Sm (R/S-Sm-a), Eu (R/S-Eu-a), Tb (R/S-Tb-a and R/S-Tb-b), Dy (R/S-Dy-a and R/S-Dy-b), Tm (R/S-Tm-b) and Yb (R/S-Yb-b). Single crystal X-ray diffraction was performed for compounds S-Eu-a and S-Tm-b. Powder crystal X-ray diffraction was performed for all complexes.

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