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1.
Farm. hosp ; 48(2): 64-69, Mar-Abr. 2024. ilus
Artigo em Espanhol | IBECS | ID: ibc-231610

RESUMO

Objetivo: analizar la evolución del proyecto «Mapa Estratégico de Atención Farmacéutica al Paciente Externo» (MAPEX) por comunidades autónomas en España, a través del análisis de los resultados de la encuesta de situación comparativa entre los años 2016 y 2021. Métodos: un comité de expertos nacionales pertenecientes a la Sociedad Española de Farmacia Hospitalaria elaboró la Encuesta MAPEX sobre la situación de las unidades de pacientes externos, que constó de 43 preguntas específicas de aspectos relacionados con estructura, contexto, integración, procesos, resultados y formación, docencia e investigación. Se llevó a cabo en 2 periodos, uno en 2016 y otro en 2021 (con 3 preguntas adicionales en 2021, relacionadas con los avances de la iniciativa MAPEX y las líneas prioritarias a seguir). Se realizó un análisis comparativo de resultados a nivel nacional y por comunidad autónoma. Resultados: participaron 141 hospitales en 2016 y 138 en 2021, con representación de las 17 comunidades autónomas. El análisis de los resultados mostró mejoras significativas en todas las dimensiones de la encuesta, con variabilidad entre las diferentes regiones. De entre las mejoras más importantes, destacó el desarrollo y consolidación de la telefarmacia, la mayor especialización del farmacéutico por áreas de conocimiento y su integración en equipos multidisciplinares. La mejora del modelo asistencial se consideró el mayor avance a nivel general (65%) y la atención farmacéutica no presencial a nivel de centro (48,2%). Se consideraron líneas prioritarias de trabajo la expansión y aplicación práctica de la metodología de atención farmacéutica (66,4%), la investigación (58,4%) y la formación en todas las iniciativas MAPEX (53,3%). Conclusiones: la implantación y desarrollo de las iniciativas MAPEX ha supuesto un impacto positivo en la evolución en todos los ámbitos asistenciales de la atención farmacéutica al paciente externo. La encuesta permite identificar...(AU)


Objective: Analyse the evolution of the MAPEX Project (Strategic Map of Pharmaceutical Care for Outpatients) by regions in Spain, through the results of the comparative situation survey between the years 2016 and 2021. Methods: A committee of national experts belonging to the Spanish Society of Hospital Pharmacy prepared the MAPEX Survey on the situation of Outpatient Units, which consisted of 43 specific questions on aspects related to structure, context, integration, processes, results and training, teaching and investigation. It was carried out in two periods, one in 2016 and another in 2021 (with 3 additional questions in 2021, related to the progress of the MAPEX initiative and the priority lines to follow). A comparative analysis of results was carried out at the national level and by regions in Spain. Results: 141 hospitals participated in 2016 and 138 in 2021, with representation from the 17 autonomous communities. The analysis of the results shows significant improvements in all the dimensions of the survey, with variability between the different regions. Among the most important improvements, the development and consolidation of telepharmacy stood out, the greater specialization of pharmacists by areas of knowledge and their integration into multidisciplinary teams. The improvement of the healthcare model was considered the greatest advance at a general level (65%), and remote pharmaceutical care at the hospital level (48.2%). Priority lines of work were considered the expansion and practical application of the pharmaceutical care methodology (66.4%), research (58.4%), and training in all MAPEX initiatives (53.3%). Conclusions: The implementation and development of the MAPEX initiatives has had a positive impact on the evolution in all healthcare areas of pharmaceutical care for outpatients. The situation survey makes it possible to identify by regions the significant points for improvement...(AU)


Assuntos
Humanos , Masculino , Feminino , Assistência Farmacêutica , Serviço de Farmácia Hospitalar , Qualidade da Assistência à Saúde , Satisfação do Paciente , Sistemas de Saúde , Espanha , Inquéritos e Questionários , Farmácia
2.
Farm. hosp ; 48(2): T64-T69, Mar-Abr. 2024. ilus
Artigo em Inglês | IBECS | ID: ibc-231611

RESUMO

Objetivo: analizar la evolución del proyecto «Mapa Estratégico de Atención Farmacéutica al Paciente Externo» (MAPEX) por comunidades autónomas en España, a través del análisis de los resultados de la encuesta de situación comparativa entre los años 2016 y 2021. Métodos: un comité de expertos nacionales pertenecientes a la Sociedad Española de Farmacia Hospitalaria elaboró la Encuesta MAPEX sobre la situación de las unidades de pacientes externos, que constó de 43 preguntas específicas de aspectos relacionados con estructura, contexto, integración, procesos, resultados y formación, docencia e investigación. Se llevó a cabo en 2 periodos, uno en 2016 y otro en 2021 (con 3 preguntas adicionales en 2021, relacionadas con los avances de la iniciativa MAPEX y las líneas prioritarias a seguir). Se realizó un análisis comparativo de resultados a nivel nacional y por comunidad autónoma. Resultados: participaron 141 hospitales en 2016 y 138 en 2021, con representación de las 17 comunidades autónomas. El análisis de los resultados mostró mejoras significativas en todas las dimensiones de la encuesta, con variabilidad entre las diferentes regiones. De entre las mejoras más importantes, destacó el desarrollo y consolidación de la telefarmacia, la mayor especialización del farmacéutico por áreas de conocimiento y su integración en equipos multidisciplinares. La mejora del modelo asistencial se consideró el mayor avance a nivel general (65%) y la atención farmacéutica no presencial a nivel de centro (48,2%). Se consideraron líneas prioritarias de trabajo la expansión y aplicación práctica de la metodología de atención farmacéutica (66,4%), la investigación (58,4%) y la formación en todas las iniciativas MAPEX (53,3%). Conclusiones: la implantación y desarrollo de las iniciativas MAPEX ha supuesto un impacto positivo en la evolución en todos los ámbitos asistenciales de la atención farmacéutica al paciente externo. La encuesta permite identificar...(AU)


Objective: Analyse the evolution of the MAPEX Project (Strategic Map of Pharmaceutical Care for Outpatients) by regions in Spain, through the results of the comparative situation survey between the years 2016 and 2021. Methods: A committee of national experts belonging to the Spanish Society of Hospital Pharmacy prepared the MAPEX Survey on the situation of Outpatient Units, which consisted of 43 specific questions on aspects related to structure, context, integration, processes, results and training, teaching and investigation. It was carried out in two periods, one in 2016 and another in 2021 (with 3 additional questions in 2021, related to the progress of the MAPEX initiative and the priority lines to follow). A comparative analysis of results was carried out at the national level and by regions in Spain. Results: 141 hospitals participated in 2016 and 138 in 2021, with representation from the 17 autonomous communities. The analysis of the results shows significant improvements in all the dimensions of the survey, with variability between the different regions. Among the most important improvements, the development and consolidation of telepharmacy stood out, the greater specialization of pharmacists by areas of knowledge and their integration into multidisciplinary teams. The improvement of the healthcare model was considered the greatest advance at a general level (65%), and remote pharmaceutical care at the hospital level (48.2%). Priority lines of work were considered the expansion and practical application of the pharmaceutical care methodology (66.4%), research (58.4%), and training in all MAPEX initiatives (53.3%). Conclusions: The implementation and development of the MAPEX initiatives has had a positive impact on the evolution in all healthcare areas of pharmaceutical care for outpatients. The situation survey makes it possible to identify by regions the significant points for improvement...(AU)


Assuntos
Humanos , Masculino , Feminino , Assistência Farmacêutica , Serviço de Farmácia Hospitalar , Qualidade da Assistência à Saúde , Satisfação do Paciente , Sistemas de Saúde , Espanha , Inquéritos e Questionários , Farmácia
3.
Farm Hosp ; 48(2): 64-69, 2024.
Artigo em Inglês, Espanhol | MEDLINE | ID: mdl-37749003

RESUMO

OBJECTIVE: Analyse the evolution of the MAPEX Project (Strategic Map of Pharmaceutical Care for Outpatients) by regions in Spain, through the results of the comparative situation survey between the years 2016 and 2021. METHODS: A committee of national experts belonging to the Spanish Society of Hospital Pharmacy prepared the MAPEX Survey on the situation of Outpatient Units, which consisted of 43 specific questions on aspects related to structure, context, integration, processes, results and training, teaching and investigation. It was carried out in two periods, one in 2016 and another in 2021 (with 3 additional questions in 2021, related to the progress of the MAPEX initiative and the priority lines to follow). A comparative analysis of results was carried out at the national level and by regions in Spain. RESULTS: 141 hospitals participated in 2016 and 138 in 2021, with representation from the 17 autonomous communities. The analysis of the results shows significant improvements in all the dimensions of the survey, with variability between the different regions. Among the most important improvements, the development and consolidation of telepharmacy stood out, the greater specialization of pharmacists by areas of knowledge and their integration into multidisciplinary teams. The improvement of the healthcare model was considered the greatest advance at a general level (65%), and remote pharmaceutical care at the hospital level (48.2%). Priority lines of work were considered the expansion and practical application of the pharmaceutical care methodology (66.4%), research (58.4%), and training in all MAPEX initiatives (53.3%). CONCLUSIONS: The implementation and development of the MAPEX initiatives has had a positive impact on the evolution in all healthcare areas of pharmaceutical care for outpatients. The situation survey makes it possible to identify by regions the significant points for improvement, as well as those areas to be developed through strengthening and corrective actions. The expansion of the project in the coming years will mean progress towards excellence in care and in the improvement of health results.


Assuntos
Pacientes Ambulatoriais , Serviço de Farmácia Hospitalar , Humanos , Espanha , Assistência Ambulatorial , Atenção à Saúde
4.
Farm Hosp ; 48(2): T64-T69, 2024.
Artigo em Inglês, Espanhol | MEDLINE | ID: mdl-38151407

RESUMO

OBJECTIVE: To analyse the evolution of the MAPEX Project (Strategic Map of Pharmaceutical Care for Outpatients) by regions in Spain, through the results of the comparative situation survey between 2016 and 2021. METHODS: A committee of national experts belonging to the Spanish Society of Hospital Pharmacy prepared the MAPEX Survey on the situation of Outpatient Units, which consisted of 43 specific questions on aspects related to structure, context, integration, processes, results and training, teaching, and investigation. It was carried out in 2 periods, one in 2016 and another in 2021 (with 3 additional questions in 2021, related to the progress of the MAPEX initiative and the priority lines to follow). A comparative analysis of results was carried out at the national level and by regions in Spain. RESULTS: 141 hospitals participated in 2016 and 138 in 2021, with representation from the 17 autonomous communities. The analysis of the results shows significant improvements in all the dimensions of the survey, with variability between the different regions. Among the most important improvements, the development and consolidation of telepharmacy stood out, the greater specialisation of pharmacists by areas of knowledge and their integration into multidisciplinary teams. The improvement of the healthcare model was considered the greatest advance at a general level (65%), and remote pharmaceutical care at the hospital level (48.2%). Priority lines of work were considered the expansion and practical application of the pharmaceutical care methodology (66.4%), research (58.4%), and training in all MAPEX initiatives (53.3%). CONCLUSIONS: The implementation and development of the MAPEX initiatives has had a positive impact on the evolution in all healthcare areas of pharmaceutical care for outpatients. The situation survey makes it possible to identify by regions the significant points for improvement, as well as those areas to be developed through strengthening and corrective actions. The expansion of the project in the coming years will mean progress toward excellence in care and in the improvement of health results.


Assuntos
Pacientes Ambulatoriais , Serviço de Farmácia Hospitalar , Humanos , Espanha , Assistência Ambulatorial , Atenção à Saúde
5.
Front Immunol ; 14: 1187665, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37928520

RESUMO

Introduction: Refractory/relapsed pediatric acute leukemia are still clinically challenging and new therapeutic strategies are needed. Interactions between Natural Killer Group 2D (NKG2D) receptor, expressed in cytotoxic immune cells, and its ligands (NKG2DL), which are upregulated in leukemic blasts, are important for anti-leukemia immunosurveillance. Nevertheless, leukemia cells may develop immunoescape strategies as NKG2DL shedding and/or downregulation. Methods: In this report, we analyzed the anti-leukemia activity of NKG2D chimeric antigen receptor (CAR) redirected memory (CD45RA-) T cells in vitro and in a murine model of T-cell acute lymphoblastic leukemia (T-ALL). We also explored in vitro how soluble NKG2DL (sNKG2DL) affected NKG2D-CAR T cells' cytotoxicity and the impact of NKG2D-CAR T cells on Jurkat cells gene expression and in vivo functionality. Results: In vitro, we found NKG2D-CAR T cells targeted leukemia cells and showed resistance to the immunosuppressive effects exerted by sNKG2DL. In vivo, NKG2D-CAR T cells controlled T cell leukemia burden and increased survival of the treated mice but failed to cure the animals. After CAR T cell treatment, Jurkat cells upregulated genes related to proliferation, survival and stemness, and in vivo, they exhibited functional properties of leukemia initiating cells. Discussion: The data here presented suggest, that, in combination with other therapeutic approaches, NKG2D-CAR T cells could be a novel treatment for pediatric T-ALL.


Assuntos
Leucemia-Linfoma Linfoblástico de Células T Precursoras , Receptores de Antígenos Quiméricos , Humanos , Criança , Camundongos , Animais , Subfamília K de Receptores Semelhantes a Lectina de Células NK/metabolismo , Leucemia-Linfoma Linfoblástico de Células T Precursoras/terapia , Linhagem Celular Tumoral , Células T de Memória
6.
Struct Dyn ; 10(5): 054501, 2023 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-37841290

RESUMO

Free-electron lasers provide bright, ultrashort, and monochromatic x-ray pulses, enabling novel spectroscopic measurements not only with femtosecond temporal resolution: The high fluence of their x-ray pulses can also easily enter the regime of the non-linear x-ray-matter interaction. Entering this regime necessitates a rigorous analysis and reliable prediction of the relevant non-linear processes for future experiment designs. Here, we show non-linear changes in the L3-edge absorption of metallic nickel thin films, measured with fluences up to 60 J/cm2. We present a simple but predictive rate model that quantitatively describes spectral changes based on the evolution of electronic populations within the pulse duration. Despite its simplicity, the model reaches good agreement with experimental results over more than three orders of magnitude in fluence, while providing a straightforward understanding of the interplay of physical processes driving the non-linear changes. Our findings provide important insights for the design and evaluation of future high-fluence free-electron laser experiments and contribute to the understanding of non-linear electron dynamics in x-ray absorption processes in solids at the femtosecond timescale.

7.
Phys Rev Lett ; 131(7): 076002, 2023 Aug 18.
Artigo em Inglês | MEDLINE | ID: mdl-37656857

RESUMO

Superfluid helium nanodroplets are an ideal environment for the formation of metastable, self-organized dopant nanostructures. However, the presence of vortices often hinders their formation. Here, we demonstrate the generation of vortex-free helium nanodroplets and explore the size range in which they can be produced. From x-ray diffraction images of xenon-doped droplets, we identify that single compact structures, assigned to vortex-free aggregation, prevail up to 10^{8} atoms per droplet. This finding builds the basis for exploring the assembly of far-from-equilibrium nanostructures at low temperatures.

8.
Front Immunol ; 14: 1197289, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37520527

RESUMO

The organization of the mitochondrial network is relevant for the metabolic fate of T cells and their ability to respond to TCR stimulation. This arrangement depends on cytoskeleton dynamics in response to TCR and CD28 activation, which allows the polarization of the mitochondria through their change in shape, and their movement along the microtubules towards the immune synapse. This work focus on the role of End-binding protein 1 (EB1), a protein that regulates tubulin polymerization and has been previously identified as a regulator of intracellular transport of CD3-enriched vesicles. EB1-interferred cells showed defective intracellular organization and metabolic strength in activated T cells, pointing to a relevant connection of the cytoskeleton and metabolism in response to TCR stimulation, which leads to increased AICD. By unifying the organization of the tubulin cytoskeleton and mitochondria during CD4+ T cell activation, this work highlights the importance of this connection for critical cell asymmetry together with metabolic functions such as glycolysis, mitochondria respiration, and cell viability.


Assuntos
Linfócitos T CD4-Positivos , Proteínas Associadas aos Microtúbulos , Mitocôndrias , Células Jurkat , Humanos , Proteínas Associadas aos Microtúbulos/metabolismo , Linfócitos T CD4-Positivos/metabolismo , Mitocôndrias/metabolismo , Tubulina (Proteína)/metabolismo , Citoesqueleto/metabolismo , Receptores de Antígenos de Linfócitos T/metabolismo , Antígenos CD28/metabolismo , Potencial da Membrana Mitocondrial , Sinapses Imunológicas
9.
JHEP Rep ; 5(8): 100756, 2023 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-37360906

RESUMO

Background & Aims: Lipotoxicity triggers non-alcoholic fatty liver disease (NAFLD) progression owing to the accumulation of toxic lipids in hepatocytes including saturated fatty acids (SFAs), which activate pro-inflammatory pathways. We investigated the impact of hepatocyte- or circulating-derived small extracellular vesicles (sEV) secreted under NAFLD conditions on liver inflammation and hepatocyte insulin signalling. Methods: sEV released by primary mouse hepatocytes, characterised and analysed by lipidomics, were added to mouse macrophages/Kupffer cells (KC) to monitor internalisation and inflammatory responses. Insulin signalling was analysed in hepatocytes exposed to conditioned media from sEV-loaded macrophages/KC. Mice were i.v. injected sEV to study liver inflammation and insulin signalling. Circulating sEV from mice and humans with NAFLD were used to evaluate macrophage-hepatocyte crosstalk. Results: Numbers of sEV released by hepatocytes increased under NAFLD conditions. Lipotoxic sEV were internalised by macrophages through the endosomal pathway and induced pro-inflammatory responses that were ameliorated by pharmacological inhibition or deletion of Toll-like receptor-4 (TLR4). Hepatocyte insulin signalling was impaired upon treatment with conditioned media from macrophages/KC loaded with lipotoxic sEV. Both hepatocyte-released lipotoxic sEV and the recipient macrophages/KC were enriched in palmitic (C16:0) and stearic (C18:0) SFAs, well-known TLR4 activators. Upon injection, lipotoxic sEV rapidly reached KC, triggering a pro-inflammatory response in the liver monitored by Jun N-terminal kinase (JNK) phosphorylation, NF-κB nuclear translocation, pro-inflammatory cytokine expression, and infiltration of immune cells into the liver parenchyma. sEV-mediated liver inflammation was attenuated by pharmacological inhibition or deletion of TLR4 in myeloid cells. Macrophage inflammation and subsequent hepatocyte insulin resistance were also induced by circulating sEV from mice and humans with NAFLD. Conclusions: We identified hepatocyte-derived sEV as SFA transporters targeting macrophages/KC and activating a TLR4-mediated pro-inflammatory response enough to induce hepatocyte insulin resistance. Impact and Implications: Small extracellular vesicles (sEV) released by the hepatocytes under non-alcoholic fatty liver disease (NAFLD) conditions cause liver inflammation and insulin resistance in hepatocytes via paracrine hepatocyte-macrophage-hepatocyte crosstalk. We identified sEV as transporters of saturated fatty acids (SFAs) and potent lipotoxic inducers of liver inflammation. TLR4 deficiency or its pharmacological inhibition ameliorated liver inflammation induced by hepatocyte-derived lipotoxic sEV. Evidence of this macrophage-hepatocyte interactome was also found in patients with NAFLD, pointing to the relevance of sEV in SFA-mediated lipotoxicity in NAFLD.

10.
Chronic Obstr Pulm Dis ; 10(3): 199-210, 2023 Jul 26.
Artigo em Inglês | MEDLINE | ID: mdl-37199731

RESUMO

Rationale: Bronchiectasis is common among those with heavy smoking histories, but risk factors for bronchiectasis, including alpha-1 antitrypsin deficiency, and its implications for COPD severity are uncharacterized in such individuals. Objectives: To characterize the impact of bronchiectasis on COPD and explore alpha-1antitrypsin as a risk factor for bronchiectasis. Methods: SubPopulations and InteRmediate Outcome Measures In COPD Study (SPIROMICS) participants (N=914; ages 40-80 years; ≥20-pack-year smoking) had high-resolution computed tomography (CT) scans interpreted visually for bronchiectasis, based on airway dilation without fibrosis or cicatrization. We performed regression-based models of bronchiectasis with clinical outcomes and quantitative CT measures. We deeply sequenced the gene encoding -alpha-1 antitrypsin, SERPINA1, in 835 participants to test for rare variants, focusing on the PiZ genotype (Glu366Lys, rs28929474). Measurements and Main Results: We identified bronchiectasis in 365 (40%) participants, more frequently in women (45% versus 36%, p=0.0045), older participants (mean age=66[standard deviation (SD)=8.3] versus 64[SD=9.1] years, p=0.0083), and those with lower lung function (forced expiratory volume in 1 second [FEV1 ] percentage predicted=66%[SD=27] versus 77%[SD=25], p<0.0001; FEV1 to forced vital capacity [FVC] ratio=0.54[0.17] versus 0.63[SD=0.16], p<0.0001). Participants with bronchiectasis had greater emphysema (%voxels ≤-950 Hounsfield units, 11%[SD=12] versus 6.3%[SD=9], p<0.0001) and parametric response mapping functional small airways disease (26[SD=15] versus 19[SD=15], p<0.0001). Bronchiectasis was more frequent in the combined PiZZ and PiMZ genotype groups compared to those without PiZ, PiS, or other rare pathogenic variants (N=21 of 40 [52%] versus N=283 of 707[40%], odds ratio [OR]=1.97; 95% confidence interval [CI]=1.002, 3.90, p=0.049), an association attributed to White individuals (OR=1.98; 95%CI = 0.9956, 3.9; p=0.051). Conclusions: Bronchiectasis was common in those with heavy smoking histories and was associated with detrimental clinical and radiographic outcomes. Our findings support alpha-1antitrypsin guideline recommendations to screen for alpha-1 antitrypsin deficiency in an appropriate bronchiectasis subgroup with a significant smoking history.

11.
J Synchrotron Radiat ; 30(Pt 2): 284-300, 2023 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-36891842

RESUMO

Femtosecond transient soft X-ray absorption spectroscopy (XAS) is a very promising technique that can be employed at X-ray free-electron lasers (FELs) to investigate out-of-equilibrium dynamics for material and energy research. Here, a dedicated setup for soft X-rays available at the Spectroscopy and Coherent Scattering (SCS) instrument at the European X-ray Free-Electron Laser (European XFEL) is presented. It consists of a beam-splitting off-axis zone plate (BOZ) used in transmission to create three copies of the incoming beam, which are used to measure the transmitted intensity through the excited and unexcited sample, as well as to monitor the incoming intensity. Since these three intensity signals are detected shot by shot and simultaneously, this setup allows normalized shot-by-shot analysis of the transmission. For photon detection, an imaging detector capable of recording up to 800 images at 4.5 MHz frame rate during the FEL burst is employed, and allows a photon-shot-noise-limited sensitivity to be approached. The setup and its capabilities are reviewed as well as the online and offline analysis tools provided to users.

12.
Methods Cell Biol ; 173: 15-32, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36653081

RESUMO

T cell receptor (TCR) and B cell receptor (BCR) stimulation of T and B lymphocytes, by antigen presented on an antigen-presenting cell (APC) induces the formation of the immunological synapse (IS). IS formation is associated with an initial increase in cortical filamentous actin (F-actin) at the IS, followed by a decrease in F-actin density at the central region of the IS, which contains the secretory domain. This is followed by the convergence of secretion vesicles towards the centrosome, and the polarization of the centrosome to the IS. These reversible, cortical actin cytoskeleton reorganization processes occur during lytic granule secretion in cytotoxic T lymphocytes (CTL) and natural killer (NK) cells, proteolytic granules secretion in B lymphocytes and during cytokine-containing vesicle secretion in T-helper (Th) lymphocytes. In addition, several findings obtained in T and B lymphocytes forming IS show that actin cytoskeleton reorganization also occurs at the centrosomal area. F-actin reduction at the centrosomal area appears to be associated with centrosome polarization. In this chapter we deal with the analysis of centrosomal area F-actin reorganization, as well as the centrosome polarization analysis toward the IS.


Assuntos
Actinas , Sinapses Imunológicas , Ativação Linfocitária , Centrossomo , Linfócitos T Citotóxicos
13.
Front Immunol ; 14: 1324557, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-38268920

RESUMO

T cell receptor (TCR) binding to cognate antigen on the plasma membrane of an antigen-presenting cell (APC) triggers the immune synapse (IS) formation. The IS constitutes a dedicated contact region between different cells that comprises a signaling platform where several cues evoked by TCR and accessory molecules are integrated, ultimately leading to an effective TCR signal transmission that guarantees intercellular message communication. This eventually leads to T lymphocyte activation and the efficient execution of different T lymphocyte effector tasks, including cytotoxicity and subsequent target cell death. Recent evidence demonstrates that the transmission of information between immune cells forming synapses is produced, to a significant extent, by the generation and secretion of distinct extracellular vesicles (EV) from both the effector T lymphocyte and the APC. These EV carry biologically active molecules that transfer cues among immune cells leading to a broad range of biological responses in the recipient cells. Included among these bioactive molecules are regulatory miRNAs, pro-apoptotic molecules implicated in target cell apoptosis, or molecules triggering cell activation. In this study we deal with the different EV classes detected at the IS, placing emphasis on the most recent findings on microvilli/lamellipodium-produced EV. The signals leading to polarized secretion of EV at the synaptic cleft will be discussed, showing that the IS architecture fulfills a fundamental task during this route.


Assuntos
Vesículas Extracelulares , Microvilosidades , Sinapses , Membrana Celular , Receptores de Antígenos de Linfócitos T
14.
Elife ; 112022 09 05.
Artigo em Inglês | MEDLINE | ID: mdl-36063381

RESUMO

Primary cilia are sensory membrane protrusions whose dysfunction causes ciliopathies. INPP5E is a ciliary phosphoinositide phosphatase mutated in ciliopathies like Joubert syndrome. INPP5E regulates numerous ciliary functions, but how it accumulates in cilia remains poorly understood. Herein, we show INPP5E ciliary targeting requires its folded catalytic domain and is controlled by four conserved ciliary localization signals (CLSs): LLxPIR motif (CLS1), W383 (CLS2), FDRxLYL motif (CLS3) and CaaX box (CLS4). We answer two long-standing questions in the field. First, partial CLS1-CLS4 redundancy explains why CLS4 is dispensable for ciliary targeting. Second, the essential need for CLS2 clarifies why CLS3-CLS4 are together insufficient for ciliary accumulation. Furthermore, we reveal that some Joubert syndrome mutations perturb INPP5E ciliary targeting, and clarify how each CLS works: (i) CLS4 recruits PDE6D, RPGR and ARL13B, (ii) CLS2-CLS3 regulate association to TULP3, ARL13B, and CEP164, and (iii) CLS1 and CLS4 cooperate in ATG16L1 binding. Altogether, we shed light on the mechanisms of INPP5E ciliary targeting, revealing a complexity without known parallels among ciliary cargoes.


Assuntos
Ciliopatias , Doenças Renais Císticas , Anormalidades Múltiplas , Cerebelo/anormalidades , Cílios/metabolismo , Anormalidades do Olho , Proteínas do Olho/metabolismo , Humanos , Doenças Renais Císticas/genética , Doenças Renais Císticas/metabolismo , Monoéster Fosfórico Hidrolases/genética , Monoéster Fosfórico Hidrolases/metabolismo , Retina/anormalidades
15.
Nat Commun ; 13(1): 2741, 2022 May 18.
Artigo em Inglês | MEDLINE | ID: mdl-35585096

RESUMO

Time-resolved momentum microscopy provides insight into the ultrafast interplay between structural and electronic dynamics. Here we extend orbital tomography into the time domain in combination with time-resolved momentum microscopy at a free-electron laser (FEL) to follow transient photoelectron momentum maps of excited states of a bilayer pentacene film on Ag(110). We use optical pump and FEL probe pulses by keeping FEL source conditions to minimize space charge effects and radiation damage. From the momentum microscopy signal, we obtain time-dependent momentum maps of the excited-state dynamics of both pentacene layers separately. In a combined experimental and theoretical study, we interpret the observed signal for the bottom layer as resulting from the charge redistribution between the molecule and the substrate induced by excitation. We identify that the dynamics of the top pentacene layer resembles excited-state molecular dynamics.

16.
Curr Allergy Asthma Rep ; 22(9): 101-111, 2022 09.
Artigo em Inglês | MEDLINE | ID: mdl-35596100

RESUMO

PURPOSE OF REVIEW: Alpha-1 antitrypsin deficiency (AATD) is one of the most common genetic diseases that is associated with severe complications and yet remains underdiagnosed. The pulmonary symptoms of both AATD and asthma include cough, excessive sputum production, dyspnea, and wheezing. These symptoms overlap significantly leading to difficulty distinguishing between these two conditions and suspicion that there may be an overlap syndrome. We aim to discuss the pathophysiology, clinical manifestations, and treatment of both alpha-1 antitrypsin and asthma and how they may overlap. RECENT FINDINGS: Recent literature suggests that there is an association between asthma and AATD. This association has been hypothesized to be secondary to an imbalance of elastase and anti-elastase leading to a pro-inflammatory state in patients with AATD. This review serves to overview the pathophysiology, clinical manifestations, and treatment of alpha-1 antitrypsin, asthma, and the increasingly recognized intersection of the two, AATD-asthma overlap syndrome.


Assuntos
Asma , Pneumopatias , Doença Pulmonar Obstrutiva Crônica , Deficiência de alfa 1-Antitripsina , Asma/complicações , Asma/diagnóstico , Asma/terapia , Humanos , Pulmão , Pneumopatias/tratamento farmacológico , Doença Pulmonar Obstrutiva Crônica/terapia , Síndrome , alfa 1-Antitripsina/genética , alfa 1-Antitripsina/uso terapêutico , Deficiência de alfa 1-Antitripsina/complicações , Deficiência de alfa 1-Antitripsina/diagnóstico , Deficiência de alfa 1-Antitripsina/genética
17.
Pediatr Pulmonol ; 57(7): 1782-1788, 2022 07.
Artigo em Inglês | MEDLINE | ID: mdl-35451201

RESUMO

BACKGROUND: Heterozygote carriers of potentially pathogenic variants in the cystic fibrosis transmembrane conductance regulator (CFTR) gene have increased asthma risk. However, the frequency and impact of CFTR variation among individuals with asthma is unknown. OBJECTIVE: To determine whether potentially pathogenic CFTR variants associate with disease severity and whether individuals with two potentially pathogenic variants exist in a severe asthma-enriched cohort. METHODS: We analyzed sequencing data spanning a 190.5Kb region of CFTR in participants from the Severe Asthma Research Program (SARP1-3). Potentially pathogenic, rare CFTR variants (frequency < 0.05) were classified as CF-causing or of varying clinical consequences (VVCC) (CFTR2. org). Regression-based models tested for association between CFTR genotypes (0-2 potentially pathogenic variants) and severity outcomes. RESULTS: Of 1401 participants, 9.5% (134) had one potentially pathogenic variant, occurring more frequently in non-Hispanic white (NHW, 10.1% [84 of 831]) compared to African American individuals (AA, 5.2% [22 of 426]). We found ≥2 potentially pathogenic CFTR variants in 1.4% (19); 0.5% (4) of NHW and 2.8% (12) of AA. Potentially pathogenic CFTR variant genotypes (≥1 or ≥2 variants) were not cumulatively associated with lung function or exacerbations. In NHW, we found three F508del compound heterozygotes with F508del and a VVCC (two 5 T; TG12[c.1210-11 T > G] and one Arg1070Trp) and a homozygote for the VVCC, 5 T; TG12. CONCLUSIONS: We found potentially pathogenic CFTR variants within a severe asthma-enriched cohort, including three compound heterozygote genotypes variably associated with CF in NHW individuals. These findings provide the rationale for CFTR sequencing and phenotyping of CF-related traits in individuals with severe asthma.


Assuntos
Asma , Regulador de Condutância Transmembrana em Fibrose Cística/genética , Fibrose Cística , Asma/genética , Fibrose Cística/genética , Humanos , Mutação , Análise de Sequência de DNA
18.
Cells ; 11(5)2022 02 24.
Artigo em Inglês | MEDLINE | ID: mdl-35269412

RESUMO

Extracellular vesicles (EV) are a very diverse group of cell-derived vesicles released by almost all kind of living cells. EV are involved in intercellular exchange, both nearby and systemically, since they induce signals and transmit their cargo (proteins, lipids, miRNAs) to other cells, which subsequently trigger a wide variety of biological responses in the target cells. However, cell surface receptor-induced EV release is limited to cells from the immune system, including T lymphocytes. T cell receptor activation of T lymphocytes induces secretion of EV containing T cell receptors for antigen and several bioactive molecules, including proapoptotic proteins. These EV are specific for antigen-bearing cells, which make them ideal candidates for a cell-free, EV-dependent cancer therapy. In this review we examine the generation of EV by T lymphocytes and CAR-T cells and some potential therapeutic approaches of these EV.


Assuntos
Exossomos , Vesículas Extracelulares , Neoplasias , Antígenos/metabolismo , Exossomos/metabolismo , Humanos , Neoplasias/metabolismo , Receptores de Antígenos de Linfócitos T/metabolismo , Linfócitos T
19.
Nurs Crit Care ; 27(6): 849-858, 2022 11.
Artigo em Inglês | MEDLINE | ID: mdl-35088491

RESUMO

BACKGROUND: Antimicrobial resistance is a threat to global public health. The use of prolonged infusions in the hospital setting for certain antimicrobials is widely increasing in order to improve their efficacy and safety, including resistance development. Due to limited vascular access, it is important to clarify whether they can be infused through the same line with other drugs during Y-site administration. AIM: The aim of this review is to update and summarize the evidence on Y-site compatibility of antibacterial agents administered as prolonged infusions in intensive care units (ICUs). STUDY DESIGN: A literature review of PubMed, EMBASE and Trissel's Handbook on Injectable Drugs databases was conducted on the compatibility of selected antimicrobials administered simultaneously at a Y-site connection with parenteral nutrition and other widely used drugs in ICUs. All articles published up to October 30, 2021, in English or Spanish were included, regardless of the type of publication (original articles, case reports, letters, etc.). Eligible antimicrobials were those that can be administered as prolonged infusions: ceftazidime, cefepime, piperacillin/tazobactam, meropenem, ceftolozane/tazobactam, ceftaroline, cloxacillin, ceftobiprole, vancomycin and fosfomycin. RESULTS: A total of 1302 drug-to-drug potential combinations were explored, 196 (15.05%) were found to be incompatible, and in 541 (41.55%), data were not available. The results were presented in a simple 2-dimensional consultation chart as a quick reference for health care professionals. CONCLUSIONS: This review provides useful and reliable information on the compatibility of antimicrobials administered as Y-site infusion with other drugs commonly used in the critical setting. This review contributes to patient safety in nursing practice. RELEVANCE TO CLINICAL PRACTICE: To our knowledge, this is the first review on Y-site compatibility of antimicrobials used as prolonged infusions with other commonly used drugs, including anti-emetics, analgesics and anti-epileptic and parenteral nutrition. The results of the current review need to be addressed to promote the knowledge sharing between health professionals and improve the quality and safety of patients. We believe that this review may serve as a simple and effective 2-dimensional updated drug-to-drug compatibility reference chart for critical care nurses.


Assuntos
Antibacterianos , Humanos , Infusões Intravenosas , Meropeném , Cefepima , Tazobactam
20.
Front Cell Dev Biol ; 9: 629097, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33614660

RESUMO

T cell receptor (TCR) and B cell receptor (BCR) stimulation by antigen presented on an antigen-presenting cell (APC) induces the formation of the immune synapse (IS), the convergence of secretory vesicles from T and B lymphocytes toward the centrosome, and the polarization of the centrosome to the immune synapse. Immune synapse formation is associated with an initial increase in cortical F-actin at the synapse, followed by a decrease in F-actin density at the central region of the immune synapse, which contains the secretory domain. These reversible, actin cytoskeleton reorganization processes occur during lytic granule degranulation in cytotoxic T lymphocytes (CTL) and cytokine-containing vesicle secretion in T-helper (Th) lymphocytes. Recent evidences obtained in T and B lymphocytes forming synapses show that F-actin reorganization also occurs at the centrosomal area. F-actin reduction at the centrosomal area appears to be involved in centrosome polarization. In this review we deal with the biological significance of both cortical and centrosomal area F-actin reorganization and some of the derived biological consequences.

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