Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 1.101
Filtrar
Más filtros

Tipo del documento
Intervalo de año de publicación
1.
Cell ; 154(4): 801-13, 2013 Aug 15.
Artículo en Inglés | MEDLINE | ID: mdl-23953112

RESUMEN

During cell division, transcription factors (TFs) are removed from chromatin twice, during DNA synthesis and during condensation of chromosomes. How TFs can efficiently find their sites following these stages has been unclear. Here, we have analyzed the binding pattern of expressed TFs in human colorectal cancer cells. We find that binding of TFs is highly clustered and that the clusters are enriched in binding motifs for several major TF classes. Strikingly, almost all clusters are formed around cohesin, and loss of cohesin decreases both DNA accessibility and binding of TFs to clusters. We show that cohesin remains bound in S phase, holding the nascent sister chromatids together at the TF cluster sites. Furthermore, cohesin remains bound to the cluster sites when TFs are evicted in early M phase. These results suggest that cohesin-binding functions as a cellular memory that promotes re-establishment of TF clusters after DNA replication and chromatin condensation.


Asunto(s)
Proteínas de Ciclo Celular/metabolismo , Ciclo Celular , Proteínas Cromosómicas no Histona/metabolismo , Factores de Transcripción/metabolismo , Animales , Línea Celular Tumoral , Inmunoprecipitación de Cromatina , Elementos de Facilitación Genéticos , Regulación de la Expresión Génica , Estudio de Asociación del Genoma Completo , Secuenciación de Nucleótidos de Alto Rendimiento , Humanos , Ratones , Motivos de Nucleótidos , Cohesinas
2.
Circ Res ; 134(11): 1405-1423, 2024 May 24.
Artículo en Inglés | MEDLINE | ID: mdl-38639096

RESUMEN

BACKGROUND: While our understanding of the single-cell gene expression patterns underlying the transformation of vascular cell types during the progression of atherosclerosis is rapidly improving, the clinical and pathophysiological relevance of these changes remains poorly understood. METHODS: Single-cell RNA sequencing data generated with SmartSeq2 (≈8000 genes/cell) in 16 588 single cells isolated during atherosclerosis progression in Ldlr-/-Apob100/100 mice with human-like plasma lipoproteins and from humans with asymptomatic and symptomatic carotid plaques was clustered into multiple subtypes. For clinical and pathophysiological context, the advanced-stage and symptomatic subtype clusters were integrated with 135 tissue-specific (atherosclerotic aortic wall, mammary artery, liver, skeletal muscle, and visceral and subcutaneous, fat) gene-regulatory networks (GRNs) inferred from 600 coronary artery disease patients in the STARNET (Stockholm-Tartu Atherosclerosis Reverse Network Engineering Task) study. RESULTS: Advanced stages of atherosclerosis progression and symptomatic carotid plaques were largely characterized by 3 smooth muscle cells (SMCs), and 3 macrophage subtype clusters with extracellular matrix organization/osteogenic (SMC), and M1-type proinflammatory/Trem2-high lipid-associated (macrophage) phenotypes. Integrative analysis of these 6 clusters with STARNET revealed significant enrichments of 3 arterial wall GRNs: GRN33 (macrophage), GRN39 (SMC), and GRN122 (macrophage) with major contributions to coronary artery disease heritability and strong associations with clinical scores of coronary atherosclerosis severity. The presence and pathophysiological relevance of GRN39 were verified in 5 independent RNAseq data sets obtained from the human coronary and aortic artery, and primary SMCs and by targeting its top-key drivers, FRZB and ALCAM in cultured human coronary artery SMCs. CONCLUSIONS: By identifying and integrating the most gene-rich single-cell subclusters of atherosclerosis to date with a coronary artery disease framework of GRNs, GRN39 was identified and independently validated as being critical for the transformation of contractile SMCs into an osteogenic phenotype promoting advanced, symptomatic atherosclerosis.


Asunto(s)
Aterosclerosis , Redes Reguladoras de Genes , Análisis de la Célula Individual , Humanos , Animales , Aterosclerosis/genética , Aterosclerosis/metabolismo , Aterosclerosis/patología , Ratones , Miocitos del Músculo Liso/metabolismo , Miocitos del Músculo Liso/patología , Masculino , Placa Aterosclerótica , Progresión de la Enfermedad , Femenino , Macrófagos/metabolismo , Macrófagos/patología , Ratones Noqueados , Receptores de LDL/genética , Receptores de LDL/metabolismo , Ratones Endogámicos C57BL , Músculo Liso Vascular/metabolismo , Músculo Liso Vascular/patología
3.
Nature ; 587(7832): 133-138, 2020 11.
Artículo en Inglés | MEDLINE | ID: mdl-32968279

RESUMEN

Cell death in human diseases is often a consequence of disrupted cellular homeostasis. If cell death is prevented without restoring cellular homeostasis, it may lead to a persistent dysfunctional and pathological state. Although mechanisms of cell death have been thoroughly investigated1-3, it remains unclear how homeostasis can be restored after inhibition of cell death. Here we identify TRADD4-6, an adaptor protein, as a direct regulator of both cellular homeostasis and apoptosis. TRADD modulates cellular homeostasis by inhibiting K63-linked ubiquitination of beclin 1 mediated by TRAF2, cIAP1 and cIAP2, thereby reducing autophagy. TRADD deficiency inhibits RIPK1-dependent extrinsic apoptosis and proteasomal stress-induced intrinsic apoptosis. We also show that the small molecules ICCB-19 and Apt-1 bind to a pocket on the N-terminal TRAF2-binding domain of TRADD (TRADD-N), which interacts with the C-terminal domain (TRADD-C) and TRAF2 to modulate the ubiquitination of RIPK1 and beclin 1. Inhibition of TRADD by ICCB-19 or Apt-1 blocks apoptosis and restores cellular homeostasis by activating autophagy in cells with accumulated mutant tau, α-synuclein, or huntingtin. Treatment with Apt-1 restored proteostasis and inhibited cell death in a mouse model of proteinopathy induced by mutant tau(P301S). We conclude that pharmacological targeting of TRADD may represent a promising strategy for inhibiting cell death and restoring homeostasis to treat human diseases.


Asunto(s)
Apoptosis/efectos de los fármacos , Homeostasis/efectos de los fármacos , Proteína de Dominio de Muerte Asociada a Receptor de TNF/antagonistas & inhibidores , Proteína de Dominio de Muerte Asociada a Receptor de TNF/metabolismo , Animales , Autofagia/efectos de los fármacos , Proteína 3 que Contiene Repeticiones IAP de Baculovirus/metabolismo , Beclina-1/química , Beclina-1/metabolismo , Bortezomib/antagonistas & inhibidores , Bortezomib/farmacología , Línea Celular , Humanos , Proteína Huntingtina/metabolismo , Proteínas Inhibidoras de la Apoptosis/metabolismo , Masculino , Ratones , Modelos Moleculares , Ovillos Neurofibrilares/metabolismo , Proteoma/metabolismo , Proteína Serina-Treonina Quinasas de Interacción con Receptores/química , Proteína Serina-Treonina Quinasas de Interacción con Receptores/metabolismo , Proteína de Dominio de Muerte Asociada a Receptor de TNF/química , Proteína de Dominio de Muerte Asociada a Receptor de TNF/deficiencia , Factor 2 Asociado a Receptor de TNF/metabolismo , Ubiquitinación , alfa-Sinucleína/metabolismo , Proteínas tau/metabolismo
4.
Proc Natl Acad Sci U S A ; 120(39): e2308079120, 2023 09 26.
Artículo en Inglés | MEDLINE | ID: mdl-37733743

RESUMEN

TAK1 is a key modulator of both NF-κB signaling and RIPK1. In TNF signaling pathway, activation of TAK1 directly mediates the phosphorylation of IKK complex and RIPK1. In a search for small molecule activators of RIPK1-mediated necroptosis, we found R406/R788, two small molecule analogs that could promote sustained activation of TAK1. Treatment with R406 sensitized cells to TNF-mediated necroptosis and RIPK1-dependent apoptosis by promoting sustained RIPK1 activation. Using click chemistry and multiple biochemical binding assays, we showed that treatment with R406 promotes the activation of TAK1 by directly binding to TAK1, independent of its original target Syk kinase. Treatment with R406 promoted the ubiquitination of TAK1 and the interaction of activated TAK1 with ubiquitinated RIPK1. Finally, we showed that R406/R788 could promote the cancer-killing activities of TRAIL in vitro and in mouse models. Our studies demonstrate the possibility of developing small molecule TAK1 activators to potentiate the effect of TRAIL as anticancer therapies.


Asunto(s)
Apoptosis , Neoplasias , Animales , Ratones , Muerte Celular , Citosol , Neoplasias/tratamiento farmacológico , Neoplasias/genética , Ubiquitinación
5.
Mol Cell Proteomics ; 22(6): 100567, 2023 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-37172717

RESUMEN

Nasopharyngeal carcinoma (NPC), a malignant tumor distinctly characterized by ethnic and geographic distribution, is highly prevalent in Southern China and Southeast Asia. However, the molecular mechanisms of NPC have not been fully revealed at the proteomic level. In this study, 30 primary NPC samples and 22 normal nasopharyngeal epithelial tissues were collected for proteomics analysis, and a relatively complete proteomics landscape of NPC was depicted for the first time. By combining differential expression analysis, differential co-expression analysis, and network analysis, potential biomarkers and therapeutic targets were identified. Some identified targets were verified by biological experiments. We found that 17-AAG, a specific inhibitor of the identified target heat shock protein 90 (HSP90), could be a potential therapeutic drug for NPC. Finally, consensus clustering identified two NPC subtypes with specific molecular features. The subtypes and the related molecules were verified by an independent data set and may have different progression-free survival. The results of this study provide a comprehensive understanding of the proteomics molecular signatures of NPC and provide new perspectives and inspiration for prognostic determination and treatment of NPC.


Asunto(s)
Carcinoma , Neoplasias Nasofaríngeas , Humanos , Carcinoma Nasofaríngeo , Carcinoma/metabolismo , Neoplasias Nasofaríngeas/metabolismo , Proteómica/métodos , Biomarcadores de Tumor/genética , Biomarcadores de Tumor/metabolismo
6.
Proc Natl Acad Sci U S A ; 119(12): e2116776119, 2022 03 22.
Artículo en Inglés | MEDLINE | ID: mdl-35294289

RESUMEN

Shigella flexneri, a gram-negative bacterium, is the major culprit of bacterial shigellosis and causes a large number of human infection cases and deaths worldwide annually. For evading the host immune response during infection, S. flexneri secrets two highly similar E3 ligases, IpaH1.4 and IpaH2.5, to subvert the linear ubiquitin chain assembly complex (LUBAC) of host cells, which is composed of HOIP, HOIL-1L, and SHARPIN. However, the detailed molecular mechanism underpinning the subversion of the LUBAC by IpaH1.4/2.5 remains elusive. Here, we demonstrated that IpaH1.4 can specifically recognize HOIP and HOIL-1L through its leucine-rich repeat (LRR) domain by binding to the HOIP RING1 domain and HOIL-1L ubiquitin-like (UBL) domain, respectively. The determined crystal structures of IpaH1.4 LRR/HOIP RING1, IpaH1.4 LRR/HOIL-1L UBL, and HOIP RING1/UBE2L3 complexes not only elucidate the binding mechanisms of IpaH1.4 with HOIP and HOIL-1L but also unveil that the recognition of HOIP by IpaH1.4 can inhibit the E2 binding of HOIP. Furthermore, we demonstrated that the interaction of IpaH1.4 LRR with HOIP RING1 or HOIL-1L UBL is essential for the ubiquitination of HOIP or HOIL-1L in vitro as well as the suppression of NF-κB activation by IpaH1.4 in cells. In summary, our work elucidated that in addition to inducing the proteasomal degradation of LUBAC, IpaH1.4 can also inhibit the E3 activity of LUBAC by blocking its E2 loading and/or disturbing its stability, thereby providing a paradigm showing how a bacterial E3 ligase adopts multiple tactics to subvert the key LUBAC of host cells.


Asunto(s)
Shigella flexneri , Ubiquitina-Proteína Ligasas , Humanos , FN-kappa B/metabolismo , Shigella flexneri/genética , Shigella flexneri/metabolismo , Transducción de Señal , Ubiquitina/metabolismo , Ubiquitina-Proteína Ligasas/metabolismo , Ubiquitinación
7.
Genes Dev ; 31(10): 1024-1035, 2017 05 15.
Artículo en Inglés | MEDLINE | ID: mdl-28619731

RESUMEN

Aberrant activation of the Wnt signaling pathway plays an important role in human cancer development. Wnt signaling is negatively regulated by Axin, a scaffolding protein that controls a rate-limiting step in the destruction of ß-catenin, the central activator of the Wnt pathway. In Wnt-stimulated cells, Axin is rapidly modified by tankyrase-mediated poly(ADP-ribosyl)ation, which promotes the proteolysis of Axin and consequent stabilization of ß-catenin. Thus, regulation of the levels and activity of tankyrases is mechanistically important in controlling Wnt signaling. Here, we identify ubiquitin-specific protease 25 (USP25) as a positive regulator of Wnt/ß-catenin signaling. We found that USP25 directly interacted with tankyrases to promote their deubiquitination and stabilization. We demonstrated that USP25 deficiency could promote the degradation of tankyrases and consequent stabilization of Axin to antagonize Wnt signaling. We further characterized the interaction between TNKS1 and USP25 by X-ray crystal structure determination. Our results provide important new insights into the molecular mechanism that regulates the turnover of tankyrases and the possibility of targeting the stability of tankyrases by antagonizing their interaction with USP25 to modulate the Wnt/ß-catenin pathway.


Asunto(s)
Estabilidad de Enzimas/genética , Tanquirasas/metabolismo , Ubiquitina Tiolesterasa/metabolismo , Vía de Señalización Wnt/fisiología , Repetición de Anquirina , Proteína Axina/metabolismo , Línea Celular , Cristalografía por Rayos X , Células HCT116 , Células HEK293 , Humanos , Mutación , Unión Proteica , Tanquirasas/química , Ubiquitina Tiolesterasa/química , Ubiquitina Tiolesterasa/genética , Vía de Señalización Wnt/genética
8.
Genes Dev ; 31(11): 1162-1176, 2017 06 01.
Artículo en Inglés | MEDLINE | ID: mdl-28701375

RESUMEN

Stimulation of cells with TNFα leads to the formation of the TNF-R1 signaling complex (TNF-RSC) to mediate downstream cellular fate decision. Activation of the TNF-RSC is modulated by different types of ubiquitination and may lead to cell death, including apoptosis and necroptosis, in both RIPK1-dependent and RIPK1-independent manners. Spata2 (spermatogenesis-associated 2) is an adaptor protein recruited into the TNF-RSC to modulate the interaction between the linear ubiquitin chain assembly complex (LUBAC) and the deubiquitinase CYLD (cylindromatosis). However, the mechanism by which Spata2 regulates the activation of RIPK1 is unclear. Here, we report that Spata2-deficient cells show resistance to RIPK1-dependent apoptosis and necroptosis and are also partially protected against RIPK1-independent apoptosis. Spata2 deficiency promotes M1 ubiquitination of RIPK1 to inhibit RIPK1 kinase activity. Furthermore, we provide biochemical evidence for the USP domain of CYLD and the PUB domain of the SPATA2 complex preferentially deubiquitinating the M1 ubiquitin chain in vitro. Spata2 deficiency also promotes the activation of MKK4 and JNK and cytokine production independently of RIPK1 kinase activity. Spata2 deficiency sensitizes mice to systemic inflammatory response syndrome (SIRS) induced by TNFα, which can be suppressed by RIPK1 inhibitor Nec-1s. Thus, Spata2 can regulate inflammatory response and cell death in both RIPK1-dependent and RIPK1-independent manners.


Asunto(s)
Proteínas/metabolismo , Proteína Serina-Treonina Quinasas de Interacción con Receptores/metabolismo , Ubiquitinación/genética , Animales , Apoptosis/genética , Células Cultivadas , Activación Enzimática/genética , Células HEK293 , Humanos , Ratones , Ratones Endogámicos C57BL , Ratones Noqueados , Fosfotransferasas/genética , Proteínas/genética , Proteína Serina-Treonina Quinasas de Interacción con Receptores/genética , Síndrome de Respuesta Inflamatoria Sistémica/enzimología , Síndrome de Respuesta Inflamatoria Sistémica/genética
9.
Small ; 20(4): e2305615, 2024 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-37718453

RESUMEN

The development of cerium (Ce) single-atom (SA) electrocatalysts for oxygen reduction reaction (ORR) with high active-site utilization and intrinsic activity has become popular recently but remains challenging. Inspired by an interesting phenomenon that pore-coupling with single-metal cerium sites can accelerate the electron transfer predicted by density functional theory calculations, here, a facile strategy is reported for directional design of a highly active and stable Ce SA catalyst (Ce SA/MC) by the coupling of single-metal Ce-N4 sites and mesopores in nanocarbon via pore-confinement-pyrolysis of Ce/phenanthroline complexes combined with controlling the formation of Ce oxides. This catalyst delivers a comparable ORR catalytic activity with a half-wave potential of 0.845 V versus RHE to the Pt/C catalyst. Also, a Ce SA/MC-based zinc-air battery (ZAB) has exhibited a higher energy density (924 Wh kgZn -1 ) and better long-term cycling durability than a Pt/C-based ZAB. This proposed strategy may open a door for designing efficient rare-earth metal catalysts with single-metal sites coupling with porous structures for next-generation energy devices.

10.
Mol Psychiatry ; 28(9): 3966-3981, 2023 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-37907591

RESUMEN

Accumulation of amyloid ß-peptide (Aß) is a driver of Alzheimer's disease (AD). Amyloid precursor protein (App) knock-in mouse models recapitulate AD-associated Aß pathology, allowing elucidation of downstream effects of Aß accumulation and their temporal appearance upon disease progression. Here we have investigated the sequential onset of AD-like pathologies in AppNL-F and AppNL-G-F knock-in mice by time-course transcriptome analysis of hippocampus, a region severely affected in AD. Strikingly, energy metabolism emerged as one of the most significantly altered pathways already at an early stage of pathology. Functional experiments in isolated mitochondria from hippocampus of both AppNL-F and AppNL-G-F mice confirmed an upregulation of oxidative phosphorylation driven by the activity of mitochondrial complexes I, IV and V, associated with higher susceptibility to oxidative damage and Ca2+-overload. Upon increasing pathologies, the brain shifts to a state of hypometabolism with reduced abundancy of mitochondria in presynaptic terminals. These late-stage mice also displayed enlarged presynaptic areas associated with abnormal accumulation of synaptic vesicles and autophagosomes, the latter ultimately leading to local autophagy impairment in the synapses. In summary, we report that Aß-induced pathways in App knock-in mouse models recapitulate key pathologies observed in AD brain, and our data herein adds a comprehensive understanding of the pathologies including dysregulated metabolism and synapses and their timewise appearance to find new therapeutic approaches for AD.


Asunto(s)
Enfermedad de Alzheimer , Aplicaciones Móviles , Animales , Ratones , Enfermedad de Alzheimer/metabolismo , Péptidos beta-Amiloides/metabolismo , Precursor de Proteína beta-Amiloide/genética , Autofagia/genética , Modelos Animales de Enfermedad , Ratones Transgénicos
11.
J Asthma ; 61(4): 271-281, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-37851868

RESUMEN

OBJECTIVE: This study aimed to investigate the potential anti-inflammatory and antioxidant effects of apigenin in rats with acute lung injury (ALI). We also examined changes in levels of inflammatory and antioxidant factors after apigenin treatment in a rat model of ALI.Methods: We searched several databases, including PubMed, Scopus, EMBASE, Web of Science, ProQuest, and GoogleScholar, to retrieve relevant articles for our systematic review and meta-analysis.Five studies with 226 rat models of ALI were included in this study. We investigated inflammatory factors and oxidative stress with the corresponding 95% confidence interval in three groups: 1. Group1 (control vs. ALI), 2. Group2 (ALI vs. apigenin10), and 3. Group3 (ALI vs. apigenin20). RESULTS: Estimating the correlation and 95% confidence intervals for the inflammatory agents and oxidative stress in the intervention group (ALI), compared with that in the control group, respectively (correlation: 0.194; 95% confidence intervals, 0.101-0.282, p value = .001, z-value= 4.08) and (correlation: 0.099; 95% confidence intervals, 0.016-0.182, p value = .020, z value= 2.325). Estimating the correlation and 95% confidence intervals for the inflammatory agents and oxidative stress in the intervention group (apigenin 10 mg/kg), compared with that in the control group (ALI), respectively (correlation: 0.476; 95% confidence intervals, 0.391-0.553, p value = .001, z-value= 9.678) and (correlation: 0.415; 95% confidence intervals, 0.313-0.508, p value= .001, z-value= 7.349). CONCLUSION: Apigenin may have potential anti-inflammatory and antioxidant effects in rat models of ALI. However, the efficacy of apigenin as a therapeutic strategy requires further investigation through prospective controlled randomized trials.


Asunto(s)
Lesión Pulmonar Aguda , Asma , Neumonía , Ratas , Animales , Antioxidantes/farmacología , Antioxidantes/uso terapéutico , Apigenina/farmacología , Apigenina/uso terapéutico , Estudios Prospectivos , Asma/tratamiento farmacológico , Estrés Oxidativo , Neumonía/tratamiento farmacológico , Antiinflamatorios/farmacología , Antiinflamatorios/uso terapéutico , Lesión Pulmonar Aguda/tratamiento farmacológico , Pulmón , Inflamación/tratamiento farmacológico
12.
Nature ; 560(7720): 582-588, 2018 08.
Artículo en Inglés | MEDLINE | ID: mdl-30158607

RESUMEN

The Newtonian gravitational constant, G, is one of the most fundamental constants of nature, but we still do not have an accurate value for it. Despite two centuries of experimental effort, the value of G remains the least precisely known of the fundamental constants. A discrepancy of up to 0.05 per cent in recent determinations of G suggests that there may be undiscovered systematic errors in the various existing methods. One way to resolve this issue is to measure G using a number of methods that are unlikely to involve the same systematic effects. Here we report two independent determinations of G using torsion pendulum experiments with the time-of-swing method and the angular-acceleration-feedback method. We obtain G values of 6.674184 × 10-11 and 6.674484 × 10-11 cubic metres per kilogram per second squared, with relative standard uncertainties of 11.64 and 11.61 parts per million, respectively. These values have the smallest uncertainties reported until now, and both agree with the latest recommended value within two standard deviations.

13.
Immun Ageing ; 21(1): 14, 2024 Feb 05.
Artículo en Inglés | MEDLINE | ID: mdl-38317229

RESUMEN

The gradual aging of the global population has led to a surge in age-related diseases, which seriously threaten human health. Researchers are dedicated to understanding and coping with the complexities of aging, constantly uncovering the substances and mechanism related to aging like chronic low-grade inflammation. The NOD-like receptor protein 3 (NLRP3), a key regulator of the innate immune response, recognizes molecular patterns associated with pathogens and injury, initiating an intrinsic inflammatory immune response. Dysfunctional NLRP3 is linked to the onset of related diseases, particularly in the context of aging. Therefore, a profound comprehension of the regulatory mechanisms of the NLRP3 inflammasome in aging-related diseases holds the potential to enhance treatment strategies for these conditions. In this article, we review the significance of the NLRP3 inflammasome in the initiation and progression of diverse aging-related diseases. Furthermore, we explore preventive and therapeutic strategies for aging and related diseases by manipulating the NLRP3 inflammasome, along with its upstream and downstream mechanisms.

14.
Am J Respir Crit Care Med ; 207(2): 160-172, 2023 01 15.
Artículo en Inglés | MEDLINE | ID: mdl-35984444

RESUMEN

Rationale: Sustained activation of lung fibroblasts and the resulting oversynthesis of the extracellular matrix are detrimental events for patients with interstitial lung diseases (ILDs). Lung biopsy is a primary evaluation technique for the fibrotic status of ILDs, and is also a major risk factor for triggering acute deterioration. Fibroblast activation protein (FAP) is a long-known surface biomarker of activated fibroblasts, but its expression pattern and diagnostic implications in ILDs are poorly defined. Objectives: The present study aims to comprehensively investigate whether the expression intensity of FAP could be used as a potential readout to estimate or measure the amounts of activated fibroblasts in ILD lungs quantitatively. Methods: FAP expression in human primary lung fibroblasts as well as in clinical lung specimens was first tested using multiple experimental methods, including real-time quantitative PCR (qPCR), Western blot, immunofluorescence staining, deep learning measurement of whole slide immunohistochemistry, as well as single-cell sequencing. In addition, FAP-targeted positron emission tomography/computed tomography imaging PET/CT was applied to various types of patients with ILD, and the correlation between the uptake of FAP tracer and pulmonary function parameters was analyzed. Measurements and Main Results: Here, it was revealed, for the first time, FAP expression was upregulated significantly in the early phase of lung fibroblast activation event in response to a low dose of profibrotic cytokine. Single-cell sequencing data further indicate that nearly all FAP-positive cells in ILD lungs were collagen-producing fibroblasts. Immunohistochemical analysis validated that FAP expression level was closely correlated with the abundance of fibroblastic foci on human lung biopsy sections from patients with ILDs. We found that the total standard uptake value (SUV) of FAP inhibitor (FAPI) PET (SUVtotal) was significantly related to lung function decline in patients with ILD. Conclusions: Our results strongly support that in vitro and in vivo detection of FAP can assess the profibrotic activity of ILDs, which may aid in early diagnosis and the selection of an appropriate therapeutic window.


Asunto(s)
Enfermedades Pulmonares Intersticiales , Tomografía Computarizada por Tomografía de Emisión de Positrones , Humanos , Enfermedades Pulmonares Intersticiales/patología , Pulmón/patología , Fibrosis , Fibroblastos/metabolismo
15.
Skin Res Technol ; 30(4): e13710, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-38616506

RESUMEN

BACKGROUND: Melanoma central nervous system (CNS) metastasis remains a leading cause of patient mortality, and the underlying pathological mechanism has not been fully elucidated, leading to a lack of effective therapeutic strategies. MATERIALS AND METHODS: In this study, we conducted an integrated analysis of single-cell transcriptomic data related to melanoma brain metastasis (MBM) and leptomeningeal metastasis (LMM). We focused on differences of subset composition and molecular expression of monocytes in blood, primary tumor, brain metastases, and leptomeningeal metastases. RESULTS: Significant differences were observed among monocytes in blood, primary tumor, and different CNS metastatic tissues, particularly in terms of subset differentiation and gene expression patterns. Subsequent analysis revealed the upregulation of cell proportions of six monocyte subsets in brain metastasis and leptomeningeal metastasis. Based on differential gene analysis, four of these subsets exhibited increased expression of factors promoting tumor migration and survival, including AREG+ monocytes (AREG, EREG, THBS1), FABP5+ monocytes (SPP1, CCL2, CTSL), and CXCL3+ monocytes (CXCL3, IL8, IL1B). The proportions of TPSB2+ monocytes (IL32, CCL5) were notably elevated in melanoma leptomeningeal metastasis tissues. Pathway analysis indicated the activation of signaling pathways such as NOD-like receptors, NFκB, and Toll-like receptors in these metastasis-related subsets. CONCLUSION: Our findings elucidate that AREG+, FABP5+ and CXCL3+ monocytes are associated with brain metastasis and TPSB2+ monocytes are associated with leptomeningeal metastasis in melanoma, which may be contribute to the development of therapeutic strategies focusing on monocytes or cytokines for melanoma CNS metastasis.


Asunto(s)
Neoplasias Encefálicas , Melanoma , Humanos , Monocitos , Transcriptoma , Encéfalo , Proteínas de Unión a Ácidos Grasos
16.
Urol Int ; 108(2): 89-99, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38081154

RESUMEN

BACKGROUND: There is limited research into the efficacy and safety of tadalafil combined with tamsulosin for the treatment of lower urinary tract symptoms (LUTS) caused by benign prostatic hyperplasia (BPH), with or without erectile dysfunction (ED). Therefore, we aimed to investigate the efficacy and safety of combination therapy compared to that of monotherapy. METHODS: We searched PubMed, Embase, Cochrane Library, Web of Science, SinoMed, CNKI, WanFang Data Service Platform, and ClinicalTrials.gov to identify eligible studies. A total of 639 articles were retrieved, of which 12 were randomized controlled trials (RCTs) published as of February 2023 and included in this meta-analysis. RESULTS: After screening 639 articles, 12 RCTs including 1,531 subjects were considered eligible for the meta-analysis. The results showed that the total International Prostate System Score (total IPSS), maximum flow rate (Qmax), and quality of life (QoL) in tadalafil combined with tamsulosin were significantly better than those in monotherapy. Compared with tadalafil monotherapy, combination therapy mainly improved IPSS voiding. As for postvoid residual urine (PVR), the combination therapy did not improve PVR compared to the tadalafil group, but significantly improved PVR compared to the tamsulosin group. For the International Index of Erectile Function (IIEF), the curative effect of the combined group was better than that of the tamsulosin group but not better than that of the tadalafil group. In terms of safety, the adverse reactions (AEs) in the combined treatment group were significantly higher than those in the monotherapy group. None of the 12 RCTs reported serious adverse events. CONCLUSIONS: Tadalafil combined with tamsulosin was more effective in the treatment of male LUTS/BPH, with or without ED, on the improvement of total IPSS, QoL, and Qmax. However, the benefits of combination therapy for ED remain unclear. However, combination therapy seemed to have a higher incidence of adverse reactions.


Asunto(s)
Disfunción Eréctil , Síntomas del Sistema Urinario Inferior , Hiperplasia Prostática , Retención Urinaria , Masculino , Humanos , Tamsulosina/uso terapéutico , Tadalafilo/uso terapéutico , Disfunción Eréctil/tratamiento farmacológico , Disfunción Eréctil/etiología , Hiperplasia Prostática/complicaciones , Hiperplasia Prostática/tratamiento farmacológico , Inhibidores de Fosfodiesterasa 5/uso terapéutico , Sulfonamidas/uso terapéutico , Quimioterapia Combinada , Resultado del Tratamiento , Síntomas del Sistema Urinario Inferior/tratamiento farmacológico , Síntomas del Sistema Urinario Inferior/etiología , Retención Urinaria/complicaciones
17.
Ann Intern Med ; 176(7): 922-933, 2023 07.
Artículo en Inglés | MEDLINE | ID: mdl-37335994

RESUMEN

BACKGROUND: An effective and safe treatment for nausea and vomiting of pregnancy (NVP) is lacking. OBJECTIVE: To assess the efficacy and safety of acupuncture, doxylamine-pyridoxine, and a combination of both in women with moderate to severe NVP. DESIGN: Multicenter, randomized, double-blind, placebo-controlled, 2 × 2 factorial trial. (ClinicalTrials.gov: NCT04401384). SETTING: 13 tertiary hospitals in mainland China from 21 June 2020 to 2 February 2022. PARTICIPANTS: 352 women in early pregnancy with moderate to severe NVP. INTERVENTION: Participants received daily active or sham acupuncture for 30 minutes and doxylamine-pyridoxine or placebo for 14 days. MEASUREMENTS: The primary outcome was the reduction in Pregnancy-Unique Quantification of Emesis (PUQE) score at the end of the intervention at day 15 relative to baseline. Secondary outcomes included quality of life, adverse events, and maternal and perinatal complications. RESULTS: No significant interaction was detected between the interventions (P = 0.69). Participants receiving acupuncture (mean difference [MD], -0.7 [95% CI, -1.3 to -0.1]), doxylamine-pyridoxine (MD, -1.0 [CI, -1.6 to -0.4]), and the combination of both (MD, -1.6 [CI, -2.2 to -0.9]) had a larger reduction in PUQE score over the treatment course than their respective control groups (sham acupuncture, placebo, and sham acupuncture plus placebo). Compared with placebo, a higher risk for births with children who were small for gestational age was observed with doxylamine-pyridoxine (odds ratio, 3.8 [CI, 1.0 to 14.1]). LIMITATION: The placebo effects of the interventions and natural regression of the disease were not evaluated. CONCLUSION: Both acupuncture and doxylamine-pyridoxine alone are efficacious for moderate and severe NVP. However, the clinical importance of this effect is uncertain because of its modest magnitude. The combination of acupuncture and doxylamine-pyridoxine may yield a potentially larger benefit than each treatment alone. PRIMARY FUNDING SOURCE: The National Key R&D Program of China and the Project of Heilongjiang Province "TouYan" Innovation Team.


Asunto(s)
Terapia por Acupuntura , Antieméticos , Complicaciones del Embarazo , Embarazo , Niño , Femenino , Humanos , Doxilamina/efectos adversos , Piridoxina/uso terapéutico , Piridoxina/efectos adversos , Antieméticos/uso terapéutico , Calidad de Vida , Vómitos/tratamiento farmacológico , Vómitos/inducido químicamente , Náusea/tratamiento farmacológico , Complicaciones del Embarazo/tratamiento farmacológico , Terapia por Acupuntura/efectos adversos
18.
Artículo en Inglés | MEDLINE | ID: mdl-38819178

RESUMEN

Objective: The objective of this study is to investigate the diagnostic accuracy and prognostic value of amplitude-integrated electroencephalography (aEEG) in neonatal hypoxic ischemic encephalopathy (HIE). Methods: Fifty-three neonates with HIE admitted to our hospital from February 2020 to September 2021 were included in the encephalopathy group, while 22 healthy neonates born in our hospital during the same period were included in the healthy group. The neonates were separated into three subgroups based on their aEEG results: normal, slightly abnormal, and severely abnormal. We investigated the correlation between aEEG monitoring and HIE clinical grading, as well as the rate of HIE abnormal prognosis, and we analyzed the prognostic value of aEEG in HIE. Results: The aEEGs of all neonates in the healthy group were normal. In the encephalopathy group, there were 24 neonates with normal aEEGs (including 20 with mild HIE and 4 with moderate HIE), 16 neonates with mildly abnormal aEEGs (including 4 with mild HIE, 10 with moderate HIE, and 2 with severe HIE), and 13 neonates with severely abnormal aEEGs (including 4 with moderate HIE and 9 with severe HIE). A very close correlation between aEEG monitoring results and HIE grading and prognosis was found (P < .05). The head circumference of neonates with severely abnormal aEEGs was smaller than that of the other two groups and was significantly smaller than that of the healthy group (P < .05). However, there was no significant difference in the body length and weight of neonates in the severely abnormal aEEG group when compared to other groups (P > .05). Conclusion: The brain function of neonates with HIE can be accurately diagnosed with aEEG, and this diagnostic technique has a crucial application value in the early diagnosis and prognosis evaluation of neonatal HIE.

19.
J Med Internet Res ; 26: e45719, 2024 May 08.
Artículo en Inglés | MEDLINE | ID: mdl-38718388

RESUMEN

BACKGROUND: International health policies and researchers have emphasized the value of evaluating patient-reported outcomes (PROs) in clinical studies. However, the characteristics of PROs in adult tumor clinical trials in China remain insufficiently elucidated. OBJECTIVE: This study aims to assess the application and characteristics of PRO instruments as primary or secondary outcomes in adult randomized clinical trials related to tumors in China. METHODS: This cross-sectional study identified tumor-focused randomized clinical trials conducted in China between January 1, 2010, and June 30, 2022. The ClinicalTrials.gov database and the Chinese Clinical Trial Registry were selected as the databases. Trials were classified into four groups based on the use of PRO instruments: (1) trials listing PRO instruments as primary outcomes, (2) trials listing PRO instruments as secondary outcomes, (3) trials listing PRO instruments as coprimary outcomes, and (4) trials without any mention of PRO instruments. Pertinent data, including study phase, settings, geographic regions, centers, participant demographics (age and sex), funding sources, intervention types, target diseases, and the names of PRO instruments, were extracted from these trials. The target diseases involved in the trials were grouped according to the American Joint Committee on Cancer Staging Manual, 8th Edition. RESULTS: Among the 6445 trials examined, 2390 (37.08%) incorporated PRO instruments as part of their outcomes. Within this subset, 26.82% (641/2390) listed PRO instruments as primary outcomes, 52.72% (1260/2390) as secondary outcomes, and 20.46% (489/2390) as coprimary outcomes. Among the 2,155,306 participants included in these trials, PRO instruments were used to collect data from 613,648 (28.47%) patients as primary or secondary outcomes and from 74,287 (3.45%) patients as coprimary outcomes. The most common conditions explicitly using specified PRO instruments included thorax tumors (217/1280, 16.95%), breast tumors (176/1280, 13.75%), and lower gastrointestinal tract tumors (173/1280, 13.52%). Frequently used PRO instruments included the European Organisation for Research and Treatment of Cancer Quality of Life Core Questionnaire-30, the visual analog scale, the numeric rating scale, the Traditional Chinese Medicine Symptom Scale, and the Pittsburgh Sleep Quality Index. CONCLUSIONS: Over recent years, the incorporation of PROs has demonstrated an upward trajectory in adult randomized clinical trials on tumors in China. Nonetheless, the infrequent measurement of the patient's voice remains noteworthy. Disease-specific PRO instruments should be more effectively incorporated into various tumor disease categories in clinical trials, and there is room for improvement in the inclusion of PRO instruments as clinical trial end points.


Asunto(s)
Neoplasias , Medición de Resultados Informados por el Paciente , Humanos , Estudios Transversales , China , Neoplasias/terapia , Adulto , Femenino , Masculino , Ensayos Clínicos Controlados Aleatorios como Asunto , Persona de Mediana Edad , Ensayos Clínicos como Asunto
20.
Ren Fail ; 46(1): 2300302, 2024 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-38189088

RESUMEN

BACKGROUND: To evaluate the efficacy, effectiveness and safety of fermented Ophiocordyceps sinensis mycelium (FOSM) products for preventing contrast-associated acute kidney injury (CA-AKI). METHODS: Randomized controlled trials were searched from four Chinese and four English electronic databases and three clinical trial registries up to July 2023. Methodological quality was assessed by using the Cochrane risk-of-bias tool 2.0. Risk difference (RD) or risk ratio (RR) and mean difference (MD) were calculated along with the 95% confidence intervals (CIs). RESULTS: Fourteen trials testing three types of FOSM products (Bailing, Zhiling, and Jinshuibao capsules) involving 1271 participants injected contrast agents were included. For the risk of bias, all trials were rated as some concerns. Compared with routine preventive procedure (RPP) (saline hydration and alprostadil), FOSM products plus RPP showed beneficial effects in reducing the incidence of CA-AKI (14.62% and 5.35%, respectively; RD -0.06, 95% CI -0.09 to -0.03). Subgroup analysis showed that Bailing/Jinshuibao plus RPP demonstrated lower incidence of CA-AKI compared to RPP. However, there was no statistically significant difference between Zhiling with RPP and RPP in the incidence of CA-AKI. Additionally, only when FOSM products were taken before injection of the contrast, it was superior to RPP in reducing the incidence of CA-AKI. There was no statistical difference in adverse events between these two groups. CONCLUSIONS: Low certainty evidence suggests that preventive oral use of FOSM products as an adjuvant agent was safe and might decrease the incidence of CA-AKI. However, high-quality placebo-controlled trials are needed to confirm its benefit.


Asunto(s)
Lesión Renal Aguda , Productos Biológicos , Cordyceps , Humanos , Lesión Renal Aguda/inducido químicamente , Lesión Renal Aguda/epidemiología , Lesión Renal Aguda/prevención & control , Adyuvantes Farmacéuticos , Ensayos Clínicos Controlados Aleatorios como Asunto , Productos Biológicos/uso terapéutico
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA