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1.
Cell ; 184(12): 3318-3332.e17, 2021 06 10.
Artículo en Inglés | MEDLINE | ID: mdl-34038702

RESUMEN

Long-term subcellular intravital imaging in mammals is vital to study diverse intercellular behaviors and organelle functions during native physiological processes. However, optical heterogeneity, tissue opacity, and phototoxicity pose great challenges. Here, we propose a computational imaging framework, termed digital adaptive optics scanning light-field mutual iterative tomography (DAOSLIMIT), featuring high-speed, high-resolution 3D imaging, tiled wavefront correction, and low phototoxicity with a compact system. By tomographic imaging of the entire volume simultaneously, we obtained volumetric imaging across 225 × 225 × 16 µm3, with a resolution of up to 220 nm laterally and 400 nm axially, at the millisecond scale, over hundreds of thousands of time points. To establish the capabilities, we investigated large-scale cell migration and neural activities in different species and observed various subcellular dynamics in mammals during neutrophil migration and tumor cell circulation.


Asunto(s)
Algoritmos , Imagenología Tridimensional , Óptica y Fotónica , Tomografía , Animales , Calcio/metabolismo , Línea Celular Tumoral , Membrana Celular/metabolismo , Movimiento Celular , Drosophila , Células HeLa , Humanos , Larva/fisiología , Hígado/diagnóstico por imagen , Masculino , Ratones Endogámicos C57BL , Neoplasias/patología , Ratas Sprague-Dawley , Relación Señal-Ruido , Fracciones Subcelulares/fisiología , Factores de Tiempo , Pez Cebra
2.
J Cell Sci ; 136(5)2023 03 01.
Artículo en Inglés | MEDLINE | ID: mdl-36052670

RESUMEN

In common with other actomyosin contractile cellular machineries, actin turnover is required for normal function of the cytokinetic contractile ring. Cofilin is an actin-binding protein contributing to turnover by severing actin filaments, required for cytokinesis by many organisms. In fission yeast cofilin mutants, contractile rings suffer bridging instabilities in which segments of the ring peel away from the plasma membrane, forming straight bridges whose ends remain attached to the membrane. The origin of bridging instability is unclear. Here, we used molecularly explicit simulations of contractile rings to examine the role of cofilin. Simulations reproduced the experimentally observed cycles of bridging and reassembly during constriction, and the occurrence of bridging in ring segments with low density of the myosin II protein Myo2. The lack of cofilin severing produced ∼2-fold longer filaments and, consequently, ∼2-fold higher ring tensions. Simulations identified bridging as originating in the boosted ring tension, which increased centripetal forces that detached actin from Myo2, which was anchoring actin to the membrane. Thus, cofilin serves a critical role in cytokinesis by providing protection from bridging, the principal structural threat to contractile rings.


Asunto(s)
Proteínas de Schizosaccharomyces pombe , Schizosaccharomyces , Citoesqueleto de Actina/metabolismo , Factores Despolimerizantes de la Actina/metabolismo , Actinas/metabolismo , Actomiosina/metabolismo , Citocinesis , Proteínas de Microfilamentos/metabolismo , Cadenas Pesadas de Miosina/metabolismo , Miosina Tipo II/genética , Miosina Tipo II/metabolismo , Schizosaccharomyces/genética , Schizosaccharomyces/metabolismo , Proteínas de Schizosaccharomyces pombe/genética , Proteínas de Schizosaccharomyces pombe/metabolismo
3.
Eur Radiol ; 34(7): 4516-4526, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38112763

RESUMEN

OBJECTIVES: To investigate the pathological interplay between immunity and the visual processing system (VPS) in thyroid eye disease (TED). METHODS: A total of 24 active patients (AP), 26 inactive patients (IP) of TED, and 27 healthy controls (HCs) were enrolled. Orbital magnetic resonance imaging (MRI) and resting-state functional MRI (rs-fMRI) were conducted for each participant. Multiple MRI parameters of the intraorbital optic nerve (ON) were assessed. The amplitude of low-frequency fluctuations (ALFF) and regional homogeneity (ReHo) were calculated. Correlation analyses were carried out on the above parameters and clinical characteristics. RESULTS: Visual functioning scores differentiated between the AP and IP groups. The ON subarachnoid space and ON sheath diameter were significantly higher in AP than in IP. Six vision-related brain regions were identified in TED patients compared with HCs, including right calcarine (CAL.R), right cuneus (CUN.R), left postcentral gyrus (PoCG.L), right middle temporal gyrus (MTG.R), left superior frontal gyrus (SFG.L), and left caudate (CAU.L). The brain activity of MTG.R, SFG.L, and CAU.L differentiated between the AP and IP groups. The correlation analysis revealed a close association among the vision-related brain regions, MRI parameters of ON, and clinical characteristics in AP and IP, respectively. CONCLUSIONS: Combined orbital and brain neuroimaging revealed abnormalities of the VPS in TED, which had a close correlation with immune statuses. Vision-related brain regions in TED might be possibly altered by peripheral immunity via a direct or indirect approach. CLINICAL RELEVANCE STATEMENT: The discovery of this study explained the disparity of visual dysfunction in TED patients with different immune statuses. With the uncovered neuroimaging markers, early detection and intervention of visual dysfunction could be achieved and potentially benefit TED patients. KEY POINTS: • Patients with different immune statuses of thyroid eye disease varied in the presentation of visual dysfunction. • The combined orbital and brain neuroimaging study identified six altered vision-related brain regions, which had a significant correlation with the MRI parameters of the intraorbital optic nerve and immunological characteristics. • Peripheral immunity might possibly give rise to alterations in the central nervous system part of the visual processing system via a direct or indirect approach.


Asunto(s)
Oftalmopatía de Graves , Imagen por Resonancia Magnética , Neuroimagen , Humanos , Masculino , Femenino , Imagen por Resonancia Magnética/métodos , Oftalmopatía de Graves/diagnóstico por imagen , Oftalmopatía de Graves/complicaciones , Oftalmopatía de Graves/inmunología , Persona de Mediana Edad , Adulto , Neuroimagen/métodos , Encéfalo/diagnóstico por imagen , Trastornos de la Visión/diagnóstico por imagen , Trastornos de la Visión/etiología , Trastornos de la Visión/fisiopatología , Estudios de Casos y Controles , Nervio Óptico/diagnóstico por imagen , Nervio Óptico/patología , Órbita/diagnóstico por imagen
4.
Macromol Rapid Commun ; 45(4): e2300568, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-37956305

RESUMEN

Fibrous strain sensing materials with both high sensitivity and high linearity are of significant importance for wearable sensors, yet they still face great challenges. Herein, a photo-spun reaction encapsulation strategy is proposed for the continuous fabrication of fibrous strain sensor materials (AMGF) with a core-sheath structure. Metallogels (MOGs) formed by bacterial cellulose (BC) nanofibers and Ag nanoparticles (AgNPs), and thermoplastic elastomers (TPE) are employed as the core and sheath, respectively. The in situ ultraviolet light reduction of Ag+ ensured AgNPs to maintain the interconnections between the BC nanofibers and form electron conductive networks (0.31 S m-1 ). Under applied strain, the BC nanofibers experience separation, bringing AMGF a high sensitivity (gauge factor 4.36). The concentration of free ions in the MOGs uniformly varies with applied deformation, endowing AMGF with high linearity and a goodness-of-fit of 0.98. The sheath TPE provided AMGF sensor with stable working life (>10 000 s). Furthermore, the AMGF sensors are demonstrated to monitor complex deformations of the dummy joints in real-time as a wearable sensor. Therefore, the fibrous hybrid conductive network fibers fabricated via the photo-spun reaction encapsulation strategy provide a new route for addressing the challenge of achieving both high sensitivity and high linearity.


Asunto(s)
Nanopartículas del Metal , Dispositivos Electrónicos Vestibles , Nanopartículas del Metal/química , Electrones , Plata/química , Elastómeros/química
5.
Int J Med Sci ; 21(7): 1337-1343, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38818476

RESUMEN

Background: Interleukin-25 (IL-25) has been proved to play a role in the pathogenesis and metastasis of Hepatocellular carcinoma (HCC), but the relationship between the level of IL-25 and the metastasis and prognosis of HCC is still not clear. This study aimed to investigate the expression of IL-25 and other potential biochemical indicators among healthy people, HBV-associated HCC patients without lung metastasis and HBV-associated HCC patients with lung metastasis. Methods: From September 2019 to November 2021, 33 HCC patients without lung metastasis, 37 HCC patients with lung metastasis and 29 healthy controls were included in the study. IL-25 and other commonly used biochemical markers were measured to establish predictors of overall survival (OS) and progression-free survival (PFS) after treatment. Results: The serum level of IL-25 was increased in HCC patients than healthy controls (p < 0.001) and HCC patients with lung metastasis had higher IL-25 level than HCC patients without metastasis (p = 0.035). Lung metastasis also indicated higher death rate (p < 0.001) by chi-square test, higher GGT level (p = 0.024) and higher AFP level (p = 0.049) by non-parametric test. Kaplan-Meier analysis demonstrated that IL-25 was negatively associated with PFS (p = 0.024). Multivariate Cox-regression analysis indicated IL-25 (p = 0.030) and GGT (p = 0.020) to be independent predictors of poorer PFS, while IL-25 showed no significant association with OS. Conclusion: The level of IL-25 was significantly associated with disease progression and lung metastasis of HBV-associated HCC. The high expression of IL-25 predicted high recurrence rate and death probability of HCC patients after treatment. Therefore, IL-25 may be an effective predictor of prognosis in HCC.


Asunto(s)
Biomarcadores de Tumor , Carcinoma Hepatocelular , Neoplasias Hepáticas , Neoplasias Pulmonares , Humanos , Neoplasias Hepáticas/virología , Neoplasias Hepáticas/mortalidad , Neoplasias Hepáticas/sangre , Neoplasias Hepáticas/patología , Neoplasias Hepáticas/secundario , Carcinoma Hepatocelular/virología , Carcinoma Hepatocelular/mortalidad , Carcinoma Hepatocelular/patología , Carcinoma Hepatocelular/sangre , Masculino , Femenino , Neoplasias Pulmonares/patología , Neoplasias Pulmonares/mortalidad , Neoplasias Pulmonares/sangre , Neoplasias Pulmonares/virología , Persona de Mediana Edad , Biomarcadores de Tumor/sangre , Estudios de Casos y Controles , Pronóstico , Adulto , China/epidemiología , Hepatitis B/complicaciones , Hepatitis B/virología , Interleucina-17/sangre , Anciano , Pueblos del Este de Asia
6.
J Neurochem ; 165(4): 563-586, 2023 05.
Artículo en Inglés | MEDLINE | ID: mdl-36847488

RESUMEN

Progressive supranuclear palsy (PSP) is a late-onset neurodegenerative disease defined pathologically by the presence of insoluble phosphorylated-Tau (p-Tau) in neurons and glia. Identifying co-aggregating proteins within p-Tau inclusions may reveal important insights into processes affected by the aggregation of Tau. We used a proteomic approach, which combines antibody-mediated biotinylation and mass spectrometry (MS) to identify proteins proximal to p-Tau in PSP. Using this proof-of-concept workflow for identifying interacting proteins of interest, we characterized proteins proximal to p-Tau in PSP cases, identifying >84% of previously identified interaction partners of Tau and known modifiers of Tau aggregation, while 19 novel proteins not previously found associated with Tau were identified. Furthermore, our data also identified confidently assigned phosphorylation sites that have been previously reported on p-Tau. Additionally, using ingenuity pathway analysis (IPA) and human RNA-seq datasets, we identified proteins previously associated with neurological disorders and pathways involved in protein degradation, stress responses, cytoskeletal dynamics, metabolism, and neurotransmission. Together, our study demonstrates the utility of biotinylation by antibody recognition (BAR) approach to answer a fundamental question to rapidly identify proteins in proximity to p-Tau from post-mortem tissue. The application of this workflow opens up the opportunity to identify novel protein targets to give us insight into the biological process at the onset and progression of tauopathies.


Asunto(s)
Enfermedades Neurodegenerativas , Parálisis Supranuclear Progresiva , Tauopatías , Humanos , Proteínas tau/metabolismo , Parálisis Supranuclear Progresiva/metabolismo , Proteolisis , Proteómica , Tauopatías/metabolismo , Transmisión Sináptica
7.
Cell Mol Biol (Noisy-le-grand) ; 69(10): 155-159, 2023 Oct 31.
Artículo en Inglés | MEDLINE | ID: mdl-37953572

RESUMEN

Insulin-like growth factor 1 (IGF-1) has been reported to potentially link with childhood obesity and obesity-related asthma, although a causal effect has not been illustrated. This study aimed to assess their association via multi-variable Mendelian randomization (MR) analysis with two-sample summary-level data on genetic variants as instrumental variables, thus estimating a causal effect. Genetic variants associated with serum IGF-1 at genome-wide significance (GWS) in the UK Biobank study involving 363,228 individuals of European descent were introduced as instrumental variables. Summary-level data on childhood obesity and obesity-related asthma were obtained from genome-wide association studies (GWAS). Here, MR-Egger, inverse-variance weighted (IVW), simple median, weighted median and penalized weighted median methods were used in the MR study. Results showed that there were strong causal associations of IGF-1 with childhood obesity (OR, 1.27; 95% CI 1.01-1.60; P<0.05) and obesity-related asthma (OR, 1.22; 95% CI 1.07-1.38; P<0.005). In conclusion, A causal association between high IGF-1 levels and high risks of childhood obesity and obesity-related asthma is estimated, which requires further validation in large-scale trials.


Asunto(s)
Asma , Obesidad Infantil , Niño , Humanos , Obesidad Infantil/epidemiología , Obesidad Infantil/genética , Factor I del Crecimiento Similar a la Insulina/genética , Estudio de Asociación del Genoma Completo , Análisis de la Aleatorización Mendeliana , Asma/epidemiología , Asma/genética , Polimorfismo de Nucleótido Simple
8.
Mikrochim Acta ; 190(2): 70, 2023 01 25.
Artículo en Inglés | MEDLINE | ID: mdl-36694049

RESUMEN

A novel fluorescence aptasensor based on PCN-223 as an efficient quencher was developed to sensitively detect prostate-specific antigen (PSA). The 5-carboxytetramethylrhodamine (TAMRA)-labeled PSA aptamer was adsorbed on PCN-223 by π-π stacking and hydrogen-bonding interactions, which contributed to fluorescence quenching because of the photoinduced electron transfer from TAMRA to PCN-223. In addition, the amount of quenched fluorescence of the PSA-binding aptamer complex-PCN-223 was lower than that of TAMRA aptamer-PCN-223 without PSA (at excitation/emission peaks of 545/582 nm), which can be explained by the fact that the PSA-binding aptamer complexes contributed to the separation of the aptamer from PCN-223. ∆F value of fluorescence intensities for TAMRA aptamer-PCN-223 with and without PSA showed a good linear relationship with PSA concentration over a range of 0.1 to 24 ng mL-1, with a detection limit of 0.05 ng mL-1. Compared with three metal-organic frameworks (MOFs) of UiO-66-NH2, ZIF-67, and Ni3(HITP)2 as quenchers, PCN-223 as a Zr-MOF exhibited the highest ∆F value for PSA detection. The advantage of PCN-223 could be attributed to its carboxyl, benzene, and porphyrin groups, the large specific surface area and good biocompatibility. This proposed aptasensor can be successfully used to detect PSA in sera of prostate cancer patients. The PSA detection results of this aptasensor were consistent with those which were obtained from hospital by Archtecti2000sr automatic chemiluminescence immunoanalyzer. The proposed aptasensor has potential clinical detection application.


Asunto(s)
Aptámeros de Nucleótidos , Técnicas Biosensibles , Neoplasias de la Próstata , Masculino , Humanos , Antígeno Prostático Específico , Técnicas Biosensibles/métodos , Neoplasias de la Próstata/diagnóstico , Luminiscencia , Aptámeros de Nucleótidos/química
9.
Cancer Cell Int ; 22(1): 421, 2022 Dec 29.
Artículo en Inglés | MEDLINE | ID: mdl-36581895

RESUMEN

BACKGROUND: Hyaluronic acid (HA) promotes cancer metastasis; however, the currently approved treatments do not target HA. Metastatic renal carcinoma (mRCC) is an incurable disease. Sorafenib (SF) is a modestly effective antiangiogenic drug for mRCC. Although only endothelial cells express known SF targets, SF is cytotoxic to RCC cells at concentrations higher than the pharmacological-dose (5-µM). Using patient cohorts, mRCC models, and SF combination with 4-methylumbelliferone (MU), we discovered an SF target in RCC cells and targeted it for treatment. METHODS: We analyzed HA-synthase (HAS1, HAS2, HAS3) expression in RCC cells and clinical (n = 129), TCGA-KIRC (n = 542), and TCGA-KIRP (n = 291) cohorts. We evaluated the efficacy of SF and SF plus MU combination in RCC cells, HAS3-transfectants, endothelial-RCC co-cultures, and xenografts. RESULTS: RCC cells showed increased HAS3 expression. In the clinical and TCGA-KIRC/TCGA-KIRP cohorts, higher HAS3 levels predicted metastasis and shorter survival. At > 10-µM dose, SF inhibited HAS3/HA-synthesis and RCC cell growth. However, at ≤ 5-µM dose SF in combination with MU inhibited HAS3/HA synthesis, growth of RCC cells and endothelial-RCC co-cultures, and induced apoptosis. The combination inhibited motility/invasion and an HA-signaling-related invasive-signature. We previously showed that MU inhibits SF inactivation in RCC cells. While HAS3-knockdown transfectants were sensitive to SF, ectopic-HAS3-expression induced resistance to the combination. In RCC models, the combination inhibited tumor growth and metastasis with little toxicity; however, ectopic-HAS3-expressing tumors were resistant. CONCLUSION: HAS3 is the first known target of SF in RCC cells. In combination with MU (human equivalent-dose, 0.6-1.1-g/day), SF targets HAS3 and effectively abrogates mRCC.

10.
J Biol Chem ; 292(20): 8186-8194, 2017 05 19.
Artículo en Inglés | MEDLINE | ID: mdl-28377502

RESUMEN

The accumulation of soluble amyloid-ß (Aß) peptides produces profound neuronal changes in the brain during the pathogenesis of Alzheimer's disease. Excessive levels of Aß disrupt excitatory synaptic transmission by promoting the removal of synaptic AMPA receptors (AMPARs), dendritic spine loss, and synaptic depression. Recently, activity-dependent ubiquitination of the GluA1 subunit has been shown to regulate the intracellular sorting of AMPARs toward late endosomes for degradation. However, whether this ubiquitin signaling pathway mediates Aß-induced loss of surface AMPARs is unknown. In this study, we demonstrate that acute exposure of cultured neurons to soluble Aß oligomers induces AMPAR ubiquitination concomitant with the removal of AMPARs from the plasma membrane. Importantly, expression of the GluA1 ubiquitin-deficient mutants inhibited the adverse effects of Aß on the surface expression of AMPARs in neurons. Furthermore, we revealed the cross-talk between GluA1 ubiquitination and phosphorylation, in particular phosphorylation at Ser-845, which is crucial for AMPAR recycling and is known to be dephosphorylated in the presence of Aß. Our data showed that the GluA1 ubiquitin-deficient mutant enhances GluA1 phosphorylation on Ser-845. Conversely, the GluA1 S845D phosphomimetic mutant reduced binding with Nedd4-1 and hence the ubiquitination of AMPARs. Importantly, the GluA1 S845D mutant also prevented Aß-induced removal of surface AMPARs. Taken together, these findings provide the first demonstration of the dynamic cross-modulation of GluA1 ubiquitination and phosphorylation, a process that is perturbed by Aß, in regulating the membrane sorting decision that ultimately determines the number of AMPARs on the cell surface.


Asunto(s)
Péptidos beta-Amiloides/metabolismo , Mutación Missense , Neuronas/metabolismo , Fragmentos de Péptidos/metabolismo , Receptores AMPA/metabolismo , Ubiquitinación , Sustitución de Aminoácidos , Péptidos beta-Amiloides/genética , Animales , Células Cultivadas , Complejos de Clasificación Endosomal Requeridos para el Transporte/genética , Complejos de Clasificación Endosomal Requeridos para el Transporte/metabolismo , Ubiquitina-Proteína Ligasas Nedd4 , Fragmentos de Péptidos/genética , Fosforilación , Ratas , Receptores AMPA/genética , Ubiquitina-Proteína Ligasas/genética , Ubiquitina-Proteína Ligasas/metabolismo
11.
IUBMB Life ; 70(1): 81-91, 2018 01.
Artículo en Inglés | MEDLINE | ID: mdl-29281186

RESUMEN

MicroRNAs (miRNAs) have been implicated in a wide range of biological processes including angiogenesis. MiR-204 was identified as a tumor suppressor in multiple cancer types, including lung adenocarcinoma. However, the function of miR-204 in lung tumor angiogenesis remains unknown. In this study, we found that the miR-204 expression was decreased in lung adenocarcinoma based on the cancer genome atlas (TCGA) analysis and gain-of-function experiment showed that miR-204 promoted cancer cell apoptosis and suppressed cell proliferation, migration in vitro and tumor growth in vivo. Functionally, both the tube formation and migration abilities of human umbilical vein endothelial cells (HUVECs) were suppressed by conditioned media from lung cancer A549 cells with miR-204 overexpression. Meanwhile, these conditioned media inhibited proliferation and promoted apoptosis in HUVECs. The key angiogenesis inducer hypoxia inducible factor-1α (HIF1α) and the pro-angiogenic mediators vascular endothelial growth factor and platelet-derived growth factor were decreased in A549 cells transfected with miR-204 mimics. Mechanistically, miR-204 could target Janus kinase 2 (JAK2) and further impaired signal transducer and activator of transcription 3 both in vitro and in vivo. Inhibition of JAK2 or signal transducer and activator of transcription 3 (STAT3) activity with small chemical inhibitors in A549 cells impaired lung adenocarcinoma angiogenesis in vitro. Meanwhile, conditional media from interleukin 6-treated lung normal epithelial cells significantly promoted tube formation of HUVEC, which was disturbed by miR-204 overexpression. Taken together, our findings demonstrate that miR-204 attenuates angiogenesis in lung adenocarcinoma potentially via JAK2-STAT3 pathway. Clinically, the miR-204/JAK2/STAT3 signaling pathway is a putative therapeutic target in lung adenocarcinoma. © 2017 IUBMB Life, 70(1):81-91, 2018.


Asunto(s)
Adenocarcinoma del Pulmón/genética , Regulación Neoplásica de la Expresión Génica , Células Endoteliales de la Vena Umbilical Humana/metabolismo , Janus Quinasa 2/genética , MicroARNs/genética , Factor de Transcripción STAT3/genética , Células A549 , Adenocarcinoma del Pulmón/tratamiento farmacológico , Adenocarcinoma del Pulmón/metabolismo , Adenocarcinoma del Pulmón/patología , Animales , Apoptosis/efectos de los fármacos , Movimiento Celular/efectos de los fármacos , Proliferación Celular/efectos de los fármacos , Óxidos S-Cíclicos/farmacología , Compuestos Heterocíclicos con 3 Anillos/farmacología , Células Endoteliales de la Vena Umbilical Humana/citología , Células Endoteliales de la Vena Umbilical Humana/efectos de los fármacos , Humanos , Subunidad alfa del Factor 1 Inducible por Hipoxia/genética , Subunidad alfa del Factor 1 Inducible por Hipoxia/metabolismo , Janus Quinasa 2/antagonistas & inhibidores , Janus Quinasa 2/metabolismo , Ratones , Ratones Endogámicos BALB C , Ratones Desnudos , MicroARNs/metabolismo , Neovascularización Patológica , Oligorribonucleótidos/genética , Oligorribonucleótidos/metabolismo , Factor de Crecimiento Derivado de Plaquetas/antagonistas & inhibidores , Factor de Crecimiento Derivado de Plaquetas/genética , Factor de Crecimiento Derivado de Plaquetas/metabolismo , Pirrolidinas/farmacología , Factor de Transcripción STAT3/antagonistas & inhibidores , Factor de Transcripción STAT3/metabolismo , Transducción de Señal , Sulfonamidas/farmacología , Factor A de Crecimiento Endotelial Vascular/antagonistas & inhibidores , Factor A de Crecimiento Endotelial Vascular/genética , Factor A de Crecimiento Endotelial Vascular/metabolismo , Ensayos Antitumor por Modelo de Xenoinjerto
13.
Int J Med Sci ; 13(2): 154-60, 2016.
Artículo en Inglés | MEDLINE | ID: mdl-26941575

RESUMEN

Mesenchymal stem cells (MSCs) derived from bone marrow are plural-potent stem cells with immune regulatory functions. We aimed to evaluate role of FcγRIIB in the regulation of bone marrow-derived MSC function. MSCs were prepared from mouse bone marrow derived from wild-type (WT) or FcγRIIB-deficient (FcγRIIB-/-) mice. MSCs were co-cultured with bone marrow-derived dendritic cells (BMDCs), and BMDC maturation and function were evaluated by flow cytometric analysis and carboxyfluorescein succinimidyl ester-labeled OT-II T-cell addition. An acute asthma model was established by aeresol ovalbumin challenge in mice. Mice received WT or FcγRIIB-/- MSC therapy. Lung function was evaluated by histological examination and cytokine production measurement. mRNA and protein expression levels of target genes were examined by real-time quantitative polymerase chain reactionor western blotting. We found that MSCs derived from bone marrow exhibit a high level of FcγRIIB expression. FcγRIIB deficiency impaired the suppressive function of MSCs, as FcγRIIB deficiency efficiently reversed the inhibitory effect of MSCs on BMDC maturation and function. Additionally, FcγRIIB-/-MSCs were less potent at suppressing asthma in model mice, possibly through reduced expression of Smad2, Smad3, Cox-2, and prostaglandin E2 in FcγRIIB-/-MSCs. FcγRIIB might play an essential role in regulating the inhibitory effects of MSCs derived from bone marrow.


Asunto(s)
Células Madre Mesenquimatosas/fisiología , Receptores de IgG/metabolismo , Animales , Asma/etiología , Células Cultivadas , Técnicas de Cocultivo , Ciclooxigenasa 2/metabolismo , Células Dendríticas/citología , Células Dendríticas/fisiología , Dinoprostona/metabolismo , Modelos Animales de Enfermedad , Ratones Endogámicos BALB C , Ratones Noqueados , Receptores de IgG/genética , Proteína Smad2/metabolismo , Proteína smad3/metabolismo , Linfocitos T/inmunología
15.
Cell Tissue Bank ; 17(1): 59-67, 2016 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-26068598

RESUMEN

Autologous chondrocyte implantation (ACI) and osteochondral autograft transplantation (OAT or mosaicplasty) are two effective surgeries for the treatment of large cartilage defects for more than two decades. But there are always some controversies about which one has the better outcomes for the patients. The purpose of this meta-analysis is to compare the outcomes of these two surgeries and give an advice to the clinical practices. The literature search was performed on multiple electronic databases with specific included criteria. After the assessments, five Randomized controlled trials (level II) were included and two of them were in the same cohort. The continuous data of outcomes were categorized into ranked ones (excellent, good, fair and poor) for comparisons. In the six comparisons of excellent or good results and poor results, the outcomes of ACI were significantly better than OAT in only one comparison (RR 2.57, 95 % CI 1.09-6.07, P = 0.03) while others had no significant differences. We may reach a primary conclusion that there is no significant different outcome between ACI and OAT in a short-term follow-up but it may indicate that the patients with OAT may be more likely to have worse condition than that with ACI for a long-term period.


Asunto(s)
Autoinjertos/trasplante , Cartílago Articular/patología , Cartílago Articular/cirugía , Condrocitos/trasplante , Articulación de la Rodilla/patología , Articulación de la Rodilla/cirugía , Humanos , Trasplante Autólogo , Resultado del Tratamiento
16.
Endocr J ; 61(5): 513-21, 2014.
Artículo en Inglés | MEDLINE | ID: mdl-24621778

RESUMEN

Sitagliptin was used as monotherapy or in combination with metformin, thiazolidinedione or sulfonylurea. It is not clear whether effects are enhanced or unique when in combination with transient continuous subcutaneous insulin infusion (CSII) therapy. The aim of this study was to assess the safety and efficacy of sitagliptin in combination with transient CSII therapy in patients with newly diagnosed type 2 diabetes. Eighty patients with newly diagnosed type 2 diabetes from July 2011 to May 2013 were recruited into the study. These patients were randomly divided into a CSII monotherapy group (group A, n = 40) or a sitagliptin in combination with CSII therapy group (group B, n = 40) and received insulin intensive therapy. Treatments were maintained for 2 weeks. 75g oral glucose tolerance test (OGTT) was performed before and after treatments, and the levels of glucose, insulin and C-peptide were examined. The results indicated that, compared with CSII therapy group, the level of plasma glucose significantly decreased, the levels of insulin and C-peptide strikingly increased and homeostasis model assessment for beta-cell function (HOMA-ß) and Insulinogenic index (Ins index) were improved in the group of sitagliptin in combination with CSII therapy. Above all, the incidence of hypoglycemia was lower, insulin doses were less and the rate of recovery to normal glucose tolerance (NGT) or impaired glucose tolerance (IGT) determined by 75gOGTT was higher in the latter. So, Sitagliptin in combination with CSII therapy can be a new safe and effective therapy in patients with newly diagnosed type 2diabetes.


Asunto(s)
Diabetes Mellitus Tipo 2/tratamiento farmacológico , Inhibidores de la Dipeptidil-Peptidasa IV/administración & dosificación , Hipoglucemiantes/administración & dosificación , Insulina/administración & dosificación , Pirazinas/administración & dosificación , Triazoles/administración & dosificación , Adulto , Anciano , Diabetes Mellitus Tipo 2/diagnóstico , Inhibidores de la Dipeptidil-Peptidasa IV/efectos adversos , Quimioterapia Combinada , Femenino , Humanos , Hipoglucemiantes/efectos adversos , Infusiones Subcutáneas , Insulina/efectos adversos , Sistemas de Infusión de Insulina/efectos adversos , Masculino , Persona de Mediana Edad , Pirazinas/efectos adversos , Fosfato de Sitagliptina , Resultado del Tratamiento , Triazoles/efectos adversos
17.
iScience ; 27(6): 110055, 2024 Jun 21.
Artículo en Inglés | MEDLINE | ID: mdl-38868204

RESUMEN

Humans can quickly adapt to recognize acoustically degraded speech, and here we hypothesize that the quick adaptation is enabled by internal linguistic feedback - Listeners use partially recognized sentences to adapt the mapping between acoustic features and phonetic labels. We test this hypothesis by quantifying how quickly humans adapt to degraded speech and analyzing whether the adaptation process can be simulated by adapting an automatic speech recognition (ASR) system based on its own speech recognition results. We consider three types of acoustic degradation, i.e., noise vocoding, time compression, and local time-reversal. The human speech recognition rate can increase by >20% after exposure to just a few acoustically degraded sentences. Critically, the ASR system with internal linguistic feedback can adapt to degraded speech with human-level speed and accuracy. These results suggest that self-supervised learning based on linguistic feedback is a plausible strategy for human adaptation to acoustically degraded speech.

18.
Aging (Albany NY) ; 16(2): 1860-1878, 2024 01 22.
Artículo en Inglés | MEDLINE | ID: mdl-38261733

RESUMEN

BACKGROUND: Recent years revealed key molecules in lung cancer research, yet their exact roles in disease onset and progression remain uncertain. Lung cancer's heterogeneity complicates prognosis prediction. This study integrates pivotal molecules to evaluate patient prognosis and immunotherapy efficacy. METHODS: The WGCNA algorithm identified module genes linked to immunity. The Lasso-Cox method built a prognostic model for outcome prediction. GO and KEGG analyses explored gene pathways. ssGSEA quantified immune cell types and functions. The riskScore predicts the effectiveness of immunotherapy based on its correlation with DNA repair and immune checkpoint genes. Single-cell sequencing examined key gene expression across cell types. RESULTS: Using WGCNA, we identified the MEbrown module related to immunity. Lasso-Cox selected "BLK," "ITGB4," "PRKCH," and "SNAI1" for the prognostic model. MF analysis revealed enriched functions including antigen binding, GTPase regulator activity. In terms of BP, processes like immune signaling and mitotic division were enriched. CC enrichment included immunoglobulin complexes and chromosomal regions. Enriched pathways encompassed Cell cycle, Focal adhesion, Cellular senescence, and p53 signaling. ssGSEA evaluated immune cell abundance. RiskScore correlated with CTLA4 and PD1 through MMR and immune checkpoint analysis. Single-cell analysis indicated gene expression across cell types for BLK, ITGB4, PRKCH, and SNAI1. CONCLUSION: In summary, our developed prognostic model utilizing age-related genes effectively predicts lung cancer prognosis and the efficacy of immune therapy.


Asunto(s)
Neoplasias Pulmonares , Humanos , Neoplasias Pulmonares/genética , Neoplasias Pulmonares/terapia , Pronóstico , Multiómica , Envejecimiento , Inmunoterapia , Aprendizaje Automático , Microambiente Tumoral
19.
BMJ Open ; 14(3): e082135, 2024 Mar 13.
Artículo en Inglés | MEDLINE | ID: mdl-38485177

RESUMEN

INTRODUCTION: The subtransverse process interligamentary (STIL) plane block is an emerging interfascial plane block that has garnered attention for its potential to provide effective postoperative analgesia for breast and thoracic surgeries. However, a direct comparative assessment between the STIL plane block and the paravertebral block is currently lacking. Consequently, our study aims to assess the analgesic efficacy of the STIL block in comparison to paravertebral block for patients undergoing video-assisted thoracoscopic surgery (VATS). METHODS AND ANALYSIS: This study is a randomised, parallel-controlled, double-blind, non-inferiority trial, with the goal of enrolling 114 participants scheduled for uniportal VATS at Shanghai Pulmonary Hospital. Participants will be randomly assigned in a 1:1 ratio through block randomisation to receive either the STIL plane block (n=57) or the paravertebral block (n=57). The primary outcome of the study is the area under the curve of Numerical Rating Scale(NRS) scores recorded over a 48-hour period following the surgical procedure. Secondary outcomes encompass the evaluation of Quality of Recovery-40, cumulative sufentanil consumption, serum inflammatory factors, rescue medication usage, the incidence of adverse events and the patient satisfaction scores. ETHICS AND DISSEMINATION: This study has received approval from the Medical Ethics Committee of Shanghai Pulmonary Hospital (approval no. L22-329). Written informed consent will be obtained from all participants. The findings will be submitted for publication in peer-reviewed journals. TRIAL REGISTRATION NUMBER: ChiCTR2200066909.


Asunto(s)
Analgesia , Bloqueo Nervioso , Dolor Postoperatorio , Cirugía Torácica , Humanos , Analgesia/métodos , Analgésicos Opioides/uso terapéutico , China , Dolor Postoperatorio/tratamiento farmacológico , Dolor Postoperatorio/prevención & control , Ultrasonografía Intervencional , Estudios de Equivalencia como Asunto
20.
Aging Cell ; 23(3): e14055, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-38044578

RESUMEN

The heterogeneity of aging has been investigated at cellular and organic levels in the mouse model and human, but the exploration of aging heterogeneity at whole-organism level is lacking. C. elegans is an ideal model organism for studying this question as they are self-fertilized and cultured in the same chamber. Despite the tremendous progress made in single-cell proteomic analysis, there is few single-worm proteomics studies about aging. Here, we apply single-worm quantitative mass spectrometry to quantify the heterogenous proteomic changes during aging across individuals, a total of 3524 proteins from 157 C. eleagns individuals were quantified. A reconstructed C. elegans aging trajectory and proteomic landscape of fast-aging individuals were used to analyze the heterogeneity of C. elegans aging. We characterized inter-individual proteomic variation during aging and revealed contributing factors that distinguish fast-aging individuals from their siblings.


Asunto(s)
Proteínas de Caenorhabditis elegans , Caenorhabditis elegans , Animales , Ratones , Humanos , Caenorhabditis elegans/genética , Caenorhabditis elegans/metabolismo , Proteínas de Caenorhabditis elegans/genética , Proteínas de Caenorhabditis elegans/metabolismo , Proteómica/métodos , Envejecimiento , Modelos Animales de Enfermedad
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