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1.
Genes Dis ; 11(6): 101216, 2024 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-39281836

RESUMEN

Histone deacetylases (HDACs) are proteases that play a key role in chromosome structural modification and gene expression regulation, and the involvement of HDACs in cancer, the nervous system, and the metabolic and immune system has been well reviewed. Our understanding of the function of HDACs in the vascular system has recently progressed, and a significant variety of HDAC inhibitors have been shown to be effective in the treatment of vascular diseases. However, few reviews have focused on the role of HDACs in the vascular system. In this study, the role of HDACs in the regulation of the vascular system mainly involving endothelial cells and vascular smooth muscle cells was discussed based on recent updates, and the role of HDACs in different vascular pathogenesis was summarized as well. Furthermore, the therapeutic effects and prospects of HDAC inhibitors were also addressed in this review.

2.
Cancer Lett ; : 217232, 2024 Sep 12.
Artículo en Inglés | MEDLINE | ID: mdl-39276913

RESUMEN

Ferroptosis is a newly defined form of programmed cell death characterized by iron-dependent lipid peroxide accumulation and is associated with the progression of cancer. Solute carrier family 7 member 11 (SLC7A11), a key component of cystine/glutamate antiporter, has been characterized as a critical regulator of ferroptosis. Although many studies have established the transcriptional regulation of SLC7A11, it remains largely unknown how the stability of SLC7A11 is regulated in cancers, especially in triple-negative breast cancer (TNBC). Here we demonstrated that ovarian tumor domain-containing protein 5 (OTUD5), which deubiquitinated and stabilized SLC7A11, played a key role in TNBC progression and paclitaxel chemosensitivity through modulating ferroptosis. The clinical data analysis showed OTUD5 was higher expressed in TNBC, which positively correlated with SLC7A11 level. Mechanistically, OTUD5 interacted with SLC7A11 and cleaved K48-linked polyubiquitin chains from SLC7A11 to enhance the stability of SLC7A11. Taken together, these findings uncover a functional and mechanistic role of OTUD5 in TNBC progression and paclitaxel sensitivity, indicating OTUD5 could be a potential target for TNBC treatment.

3.
Health Res Policy Syst ; 22(1): 93, 2024 Aug 05.
Artículo en Inglés | MEDLINE | ID: mdl-39103868

RESUMEN

BACKGROUND: Pakistani's health services delivery system has been rarely evaluated regarding patient satisfaction. This study examined the performance of the Pakistani health system from the perspective of doctor services (DS), digital payment system (DPS), nurses' services (NS), laboratory services (LS), pharmacy services (PHS), registration services (RS), physical services (environmentally and tangible) and doctor-patient communication (DPC) about patient satisfaction. A random sampling technique was adopted for data collection. METHODOLOGY: The Social Science Statistical Package (SPSS), analysis of moment structures (AMOS), and structural equation modeling were used to analyze the data for reliability, validity, correlations, and descriptive findings. The 879 responses were used for study analysis. RESULTS: The study revealed that patient satisfaction was found to be significantly affected positively by LS, PHS, DS, NS, and DPS, while DPC, RS, and PF were impacted non-significantly. Consequently, there is a considerable communication gap in the doctor-patient interaction, and Pakistan's healthcare system is confronted with a shortage of physical infrastructure and challenges in the digital system. CONCLUSION: Furthermore, the insufficient emphasis on registration services necessitates immediate action to improve the entire patient experience and satisfaction. Identifying these shortcomings has the potential to result in a healthcare system that is more efficient and focused on the needs of the patients.


Asunto(s)
Atención a la Salud , Satisfacción del Paciente , Relaciones Médico-Paciente , Humanos , Pakistán , Masculino , Femenino , Adulto , Comunicación , Encuestas y Cuestionarios , Persona de Mediana Edad , Hospitales , Adulto Joven , Reproducibilidad de los Resultados
4.
Medicine (Baltimore) ; 103(32): e39196, 2024 Aug 09.
Artículo en Inglés | MEDLINE | ID: mdl-39121254

RESUMEN

RATIONALE: Neuroendocrine tumors (NET) refer to a group of uncommon tumors arising in the neuroendocrine system. Most NETs occur in the digestive tract and bronchi but are rare in the central nervous system, especially in the spinal canal. NET in the central nervous system mainly metastasize from other systems, with non-specific clinical symptoms. In this study, we report the diagnosis and treatment of intraspinal NET to provide clinical guidance as well as to avoid misdiagnosis and missed diagnosis. PATIENT CONCERNS: A 59-year-old male patient, presented with recurrent right lower limb pain for half a year, accompanied by numbness and weakness for 4 months and aggravation for 2 months. Lumbar spine magnetic resonance imaging (MRI) revealed a space-occupying lesion in the spinal canal. The diagnosis of primary intraspinal NET was confirmed by topathological examination. DIAGNOSIS: Primary intraspinal NET tumor. INTERVENTIONS: Surgical resection. OUTCOMES: Significant improvements in right lower limb pain, numbness, and weakness were observed, and lumbar spine MRI was performed again to dynamically observe the changes in intraspinal NET. CONCLUSIONS: Surgical resection may be an effective treatment for intraspinal NETs. LESSONS: Intraspinal NETs are relatively rare and mostly manifest as limb numbness, weakness, and pain. Due to its nonspecific clinical symptoms, intraspinal NETs are easily misdiagnosed as lumbar disc herniation with radiculopathy and lumbar spondylolisthesis. Therefore, in patients with long-term symptoms, in addition to common lumbar neuromuscular diseases, lumbar MRI should be performed promptly to exclude the possibility of lumbar NETs.


Asunto(s)
Tumores Neuroendocrinos , Humanos , Masculino , Persona de Mediana Edad , Tumores Neuroendocrinos/diagnóstico , Tumores Neuroendocrinos/cirugía , Imagen por Resonancia Magnética , Neoplasias de la Columna Vertebral/diagnóstico , Neoplasias de la Columna Vertebral/diagnóstico por imagen , Vértebras Lumbares/diagnóstico por imagen
5.
Int J Nanomedicine ; 19: 7631-7671, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-39099792

RESUMEN

Psoriasis is an immune-mediated inflammatory skin disease where topical therapy is crucial. While various dosage forms have enhanced the efficacy of current treatments, their limited permeability and lack of targeted delivery to the dermis and epidermis remain challenges. We reviewed the evolution of topical therapies for psoriasis and conducted a bibliometric analysis from 1993 to 2023 using a predictive linear regression model. This included a comprehensive statistical and visual evaluation of each model's validity, literature profiles, citation patterns, and collaborations, assessing R variance and mean squared error (MSE). Furthermore, we detailed the structural features and penetration pathways of emerging drug delivery systems for topical treatment, such as lipid-based, polymer-based, metallic nanocarriers, and nanocrystals, highlighting their advantages. This systematic overview indicates that future research should focus on developing novel drug delivery systems characterized by enhanced stability, biocompatibility, and drug-carrying capacity.


Asunto(s)
Bibliometría , Sistemas de Liberación de Medicamentos , Psoriasis , Psoriasis/tratamiento farmacológico , Humanos , Sistemas de Liberación de Medicamentos/métodos , Nanopartículas/química , Nanopartículas/administración & dosificación , Portadores de Fármacos/química , Administración Tópica , Administración Cutánea , Fármacos Dermatológicos/administración & dosificación , Fármacos Dermatológicos/farmacocinética , Fármacos Dermatológicos/química
6.
Int J Biol Macromol ; 276(Pt 2): 133957, 2024 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-39029852

RESUMEN

Staphylococcal Enterotoxin Type B (SEB), produced by Staphylococcus aureus bacteria, is notorious for inducing severe food poisoning and toxic shock syndrome. While nanobody-based treatments hold promises for combating SEB-induced diseases, the lack of structural information between SEB and nanobodies has hindered the development of nanobody-based therapeutics. Here, we present crystal structures of SEB-Nb3, SEB-Nb6, SEB-Nb8, SEB-Nb11, and SEB-Nb20 at resolutions ranging from 1.59 Å to 2.33 Å. Crystallographic analysis revealed that Nb3, Nb8, Nb11, and Nb20 bind to SEB at the T-cell receptor (TCR) interface, while Nb6 binds at the major histocompatibility complex (MHC) interface, suggesting their potential to inhibit SEB function by disrupting interactions with TCR or MHC molecules. Molecular biological analyses confirmed the thermodynamic and kinetic parameters of Nb3, Nb5, Nb6, Nb8, Nb11, Nb15, Nb18, and Nb20 to SEB. The competitive inhibition was further confirmed by cell-based experiments demonstrating nanobody neutralization. These findings elucidate the structural basis for developing specific nanobodies to neutralize SEB threats, providing crucial insights into the underlying mechanisms and offering significant assistance for further optimization towards future therapeutic strategies.


Asunto(s)
Enterotoxinas , Unión Proteica , Anticuerpos de Dominio Único , Enterotoxinas/química , Enterotoxinas/inmunología , Enterotoxinas/metabolismo , Anticuerpos de Dominio Único/química , Anticuerpos de Dominio Único/inmunología , Humanos , Modelos Moleculares , Receptores de Antígenos de Linfocitos T/metabolismo , Receptores de Antígenos de Linfocitos T/inmunología , Receptores de Antígenos de Linfocitos T/química , Staphylococcus aureus/inmunología , Cristalografía por Rayos X , Termodinámica , Cinética
7.
J Control Release ; 373: 265-276, 2024 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-39019087

RESUMEN

Curcumin potentiates the stabilization of atherosclerotic plaques by polarizing macrophages, but its non-specific targeting hinders its clinical application. We aim to harness multifunctional lipid nanoparticles (MLNPs) to facilitate the imaging and targeted delivery of curcumin specifically to inflammatory macrophages, counteracting vulnerable plaques and mitigating the risk of ischemic events. Cholesteryl-9-carboxynonanoate-(125I­iron oxide nanoparticle/Curcumin)-lipid-coated nanoparticles [9-CCN-(125I-ION/Cur)-LNPs], namely MLNPs, are designed to carry hybrid imaging agents. These agents combine 125I-ION with lipids containing phagocytic 'eat-me' signals, inducing macrophages to engulf the MLNPs. Our research demonstrates that the designed MLNPs accurately accumulate at unstable plaques and are precisely visualized and highlighted by both SPECT and MRI. Furthermore, MLNPs achieve high efficiency in delivering 125I-ION and curcumin to macrophages, ultimately leading to significant M1-to-M2 macrophage polarization. These real-time imaging and polarization capabilities of plaques have immediate clinical applicability and may pave the way for novel therapies to stabilize unstable atherosclerotic plaques.


Asunto(s)
Curcumina , Macrófagos , Nanopartículas , Placa Aterosclerótica , Curcumina/administración & dosificación , Curcumina/química , Animales , Placa Aterosclerótica/diagnóstico por imagen , Placa Aterosclerótica/tratamiento farmacológico , Nanopartículas/química , Nanopartículas/administración & dosificación , Macrófagos/efectos de los fármacos , Ratones , Fagocitosis/efectos de los fármacos , Imagen por Resonancia Magnética/métodos , Masculino , Radioisótopos de Yodo/administración & dosificación , Células RAW 264.7 , Ratones Endogámicos C57BL , Tomografía Computarizada de Emisión de Fotón Único/métodos , Lípidos/química , Liposomas
8.
Int J Pharm ; 661: 124422, 2024 Aug 15.
Artículo en Inglés | MEDLINE | ID: mdl-38977163

RESUMEN

The challenges posed by intractable relapse and metastasis in cancer treatment have led to the development of various forms of photodynamic therapy (PDT). However, traditional drug delivery systems, such as virus vectors, liposomes, and polymers, often suffer from issues like desynchronized drug release, carrier instability, and drug leakage during circulation. To address these problems, we have developed a dual-prodrug nanogel (PVBN) consisting of Pyro (Pyropheophorbide a) and SAHA (Vorinostat) bound to BSA (Bovine Serum Albumin), which facilitates synchronous and spontaneous drug release in situ within the lysosome. Detailed results indicate that PVBN-treated tumor cells exhibit elevated levels of ROS and Acetyl-H3, leading to necrosis, apoptosis, and cell cycle arrest, with PDT playing a dominant role in the synergistic therapeutic effect. Furthermore, the anti-tumor efficacy of PVBN was validated in melanoma-bearing mice, where it significantly inhibited tumor growth and pulmonary metastasis. Overall, our dual-prodrug nanogel, formed by the binding of SAHA and Pyro to BSA and releasing drugs within the lysosome, represents a novel and promising strategy for enhancing the clinical efficacy of photochemotherapy.


Asunto(s)
Clorofila , Nanogeles , Fotoquimioterapia , Profármacos , Albúmina Sérica Bovina , Vorinostat , Animales , Vorinostat/administración & dosificación , Vorinostat/farmacología , Vorinostat/química , Fotoquimioterapia/métodos , Clorofila/análogos & derivados , Clorofila/química , Clorofila/administración & dosificación , Clorofila/farmacología , Albúmina Sérica Bovina/química , Albúmina Sérica Bovina/administración & dosificación , Línea Celular Tumoral , Nanogeles/química , Profármacos/administración & dosificación , Profármacos/química , Ratones , Apoptosis/efectos de los fármacos , Liberación de Fármacos , Antineoplásicos/administración & dosificación , Antineoplásicos/química , Antineoplásicos/farmacología , Humanos , Especies Reactivas de Oxígeno/metabolismo , Fármacos Fotosensibilizantes/administración & dosificación , Fármacos Fotosensibilizantes/farmacología , Fármacos Fotosensibilizantes/química , Ratones Endogámicos C57BL , Neoplasias Pulmonares/tratamiento farmacológico , Neoplasias Pulmonares/patología , Melanoma Experimental/tratamiento farmacológico , Polietileneimina/química
9.
Front Cardiovasc Med ; 11: 1375750, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38988665

RESUMEN

Purpose: The causal associations between inflammatory factors and atrial fibrillation (AF) remained unclear. We aimed to investigate whether genetically predicted inflammatory proteins are related to the risk of AF, and vice versa. Methods: A bidirectional two-sample Mendelian randomization study was performed. The genetic variation of 91 inflammatory proteins were derived from genome-wide association study (GWAS) data of European ancestry (n = 14,824). Summary statistics for AF were obtained from a published meta-analysis study (n = 1,030,836) and the FinnGen study (n = 261,395). Results: Genetically predicted fibroblast growth factor 5 (FGF5) was significantly positively associated with risk of AF [[odds ratio (OR): 1.07; 95% CI: 1.04-1.10; P < 0.01], and CD40l receptor was significantly negatively associated with risk of AF (OR: 0.95; 95% CI: 0.92-0.98; P = 0.02) in the meta-analysis study. In the FinnGen study, similar results were observed in FGF5 (OR: 1.11; 95% CI: 1.06-1.16; P < 0.01) and CD40l receptor (OR: 0.93; 95% CI: 0.89-0.97; P = 0.03) for AF. In the FinnGen study, TNF-beta was significantly positively associated with risk of AF (OR: 1.05; 95% CI: 1.02-1.09; P = 0.03) and leukemia inhibitory factor receptor was significantly negatively associated with risk of AF (OR: 0.86; 95% CI: 0.80-0.91; P = 0.001). The causal effect of AF on inflammatory proteins was not observed. Conclusion: Our study suggested that FGF5 and CD40l receptor have a potential causal association with AF, and targeting these factors may help in the treatment of AF.

10.
Heliyon ; 10(12): e33304, 2024 Jun 30.
Artículo en Inglés | MEDLINE | ID: mdl-39022053

RESUMEN

Background: Ras association domain family member 1 (RASSF1) encodes the RASSF1A protein, serving as a scaffold protein situated at the intersection of a complex signalling network. Aims: To evaluate the immunological and prognostic significance of RASSF1 expression in various types of human cancers, with a specific focus on lung cancer. Methods: Differential expression analysis of RASSF1 was conducted based on data from The Cancer Genome Atlas, Genotype-Tissue Expression, and Cancer Cell Line Encyclopaedia databases. Prognostic analysis was performed using the Cox regression test and Kaplan-Meier test. Spearman's test was utilized for correlation analysis. Gene Ontology (GO) and Kyoto Encyclopaedia of Genes and Genomes (KEGG) gene sets were employed to enrich the associated signaling pathways. Immunohistochemical staining and quantitative real-time PCR were employed to detect protein and mRNA expression levels, respectively. Results: RASSF1 expression was significantly lower in tumour tissues than in normal tissues in most cancers, and Cox regression analysis demonstrated a significant correlation between RASSF1 expression and the prognosis of over 12 types of cancer. Specifically, high RASSF1 expression was associated with poor OS in nine cancer types, including GBMLGG (HR = 4.98, P = 1.2e-31), LGG (HR = 3.72, P = 2.5e-10), and LAML (HR = 1.48, P = 2.4e-3). Further analysis showed that RASSF1 expression was significantly correlated with immune checkpoint- and immune-related genes. Moreover, RASSF1 expression is involved in tumour microenvironment (TME), RNA modification, genomic heterogeneity, and tumour stemness. GO and KEGG analyses showed that RASSF1 was closely related to tumour immune-related pathways. Finally, RASSF1A was moderately correlated with PD-L1 (R = 0.556), and RASSF1A overexpression significantly affected the expression of several genes involved in the Th17 cell differentiation signalling pathway in lung cancer. Conclusions: RASSF1 was differentially expressed in 29 human cancers and played a critical role in tumour immunity. Thus, RASSF1 has the potential to be used as a prognostic marker and reference for achieving more precise immunotherapy, particularly in lung cancer.

12.
Front Public Health ; 12: 1376534, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-39045155

RESUMEN

Introduction: The telehealth service increased attention both during and after the Covid-19 outbreak. Nevertheless, there is a dearth of research in developing countries, including Pakistan. Hence, the objective of this study was to examine telehealth service quality dimensions to promote the telehealth behavior intention and sustainable growth of telehealth in Pakistan. Methods: This study employed a cross-sectional descriptive design. Data were collected from doctors who were delivering telehealth services through a well-designed questionnaire. To examine the hypothesis of the study, we employed the Smart PLS structural equation modeling program, namely version 0.4. Results: The study findings indicate that medical service quality, affordability, information quality, waiting time, and safety have a positive impact on the intention to engage in telehealth behavior. Furthermore, the adoption of telehealth behavior has a significant favorable effect on the actual utilization of telehealth services, which in turn has a highly good impact on sustainable development. Conclusion: The study determined that telehealth services effectively decrease the amount of time and money spent on travel, while still offering convenient access to healthcare. Furthermore, telehealth has the potential to revolutionize payment methods, infrastructure, and staffing in the healthcare industry. Implementing a well-structured telehealth service model can yield beneficial results for a nation and its regulatory efforts in the modern age of technology.


Asunto(s)
Atención a la Salud , Conductas Relacionadas con la Salud , Calidad de la Atención de Salud , Telemedicina , Pakistán , Telemedicina/economía , Telemedicina/organización & administración , Telemedicina/normas , Telemedicina/estadística & datos numéricos , Telemedicina/tendencias , Atención a la Salud/economía , Atención a la Salud/organización & administración , Atención a la Salud/estadística & datos numéricos , Atención a la Salud/tendencias , Calidad de la Atención de Salud/economía , Calidad de la Atención de Salud/normas , Calidad de la Atención de Salud/estadística & datos numéricos , Calidad de la Atención de Salud/tendencias , Humanos , Masculino , Femenino , Reproducibilidad de los Resultados , Estudios Transversales , Encuestas de Atención de la Salud , Médicos , Factores de Tiempo , Recursos Humanos
13.
Nanomaterials (Basel) ; 14(14)2024 Jul 10.
Artículo en Inglés | MEDLINE | ID: mdl-39057851

RESUMEN

The rapid progress of flexible electronics has met the growing need for detecting human movement information in exoskeleton auxiliary equipment. This study provides a review of recent advancements in the design and fabrication of flexible electronics used for human motion detection. Firstly, a comprehensive introduction is provided on various self-powered wearable flexible sensors employed in detecting human movement information. Subsequently, the algorithms utilized to provide feedback on human movement are presented, followed by a thorough discussion of their methods and effectiveness. Finally, the review concludes with perspectives on the current challenges and opportunities in implementing self-powered wearable flexible sensors in exoskeleton technology.

14.
Medicine (Baltimore) ; 103(25): e38613, 2024 Jun 21.
Artículo en Inglés | MEDLINE | ID: mdl-38905360

RESUMEN

RATIONALE: Scrub typhus is a naturally occurring acute febrile disease caused by Orientia tsutsugamushi. Although it can cause multiple organ dysfunction, central nervous system infections are uncommon. PATIENT CONCERNS: A 17-year-old male presented with a 5-day history of fever and headaches. The MRI of the head revealed thickness and enhancement of the left temporal lobe and tentorium cerebelli, indicating potential inflammation. DIAGNOSES: The patient was diagnosed with a central nervous system infection. INTERVENTIONS: Ceftriaxone and acyclovir were administered intravenously to treat the infection, reduce fever, restore acid-base balance, and manage electrolyte disorders. OUTCOMES: Despite receiving ceftriaxone and acyclovir as infection therapy, there was no improvement. Additional multipathogen metagenomic testing indicated the presence of O tsutsugamushi infection, and an eschar was identified in the left axilla. The diagnosis was changed to scrub typhus with meningitis and the therapy was modified to intravenous doxycycline. Following a 2-day therapy, the body temperature normalized, and the fever subsided. CONCLUSIONS: The patient was diagnosed with scrub typhus accompanied by meningitis, and doxycycline treatment was effective. LESSION: Rarely reported cases of scrub typhus with meningitis and the lack of identifiable symptoms increase the chance of misdiagnosis or oversight. Patients with central nervous system infections presenting with fever and headache unresponsive to conventional antibacterial and antiviral treatment should be considered for scrub typhus with meningitis. Prompt multipathogen metagenomic testing is recommended to confirm the diagnosis and modify the treatment accordingly.


Asunto(s)
Antibacterianos , Tifus por Ácaros , Humanos , Tifus por Ácaros/diagnóstico , Tifus por Ácaros/tratamiento farmacológico , Tifus por Ácaros/complicaciones , Masculino , Adolescente , Antibacterianos/uso terapéutico , Antibacterianos/administración & dosificación , Doxiciclina/uso terapéutico , Doxiciclina/administración & dosificación , Orientia tsutsugamushi/aislamiento & purificación , Meningitis Bacterianas/diagnóstico , Meningitis Bacterianas/tratamiento farmacológico , Meningitis Bacterianas/microbiología
15.
Angew Chem Int Ed Engl ; 63(34): e202407127, 2024 Aug 19.
Artículo en Inglés | MEDLINE | ID: mdl-38818628

RESUMEN

A highly effective enantioselective monobenzoylation of 1,3-diols has been developed for the synthesis of 1,1-disubstituted tetrahydro-ß-carbolines. The chemistry has been successfully applied to the asymmetric total synthesis of (+)-alstrostine G, which also features a cascade Heck/hemiamination reaction enabling facile construction of the pivotal pentacyclic core.

16.
J Hazard Mater ; 472: 134553, 2024 Jul 05.
Artículo en Inglés | MEDLINE | ID: mdl-38735191

RESUMEN

Microwave resonators combined with polymer absorption layers are widely used in volatile organic compound (VOC) detection based on their variable resonant frequencies. However, the response time is limited due to the polymer's slow volumetric absorption of VOC molecules. By constructing a porous structure in Polydimethylsiloxane (PDMS), resulting in reduced the response time to as short as 71.1%. To mitigate the sensitivity decline caused by the porous PDMS, a trenched-substrate complementary split-ring resonator (CSRR) is proposed for enhancing the interaction between the electromagnetic fields (EMFs) and the porous PDMS with VOCs. The removal of the substrate beneath CSRR's sensing region enhances the effective EMF, increasing frequency and amplitude sensitivities up to 175.5% and 137.8%, respectively. Responses to four common VOCs by the sensor show a maximum sensitivity of 217 Hz/ppm and a minimum limit of detection of 295 ppm. Additionally, resonant parameters and extracted lumped parameters are utilized to establish two decision-tree-based VOC classification models, achieving high accuracies of 98.71% and 99.59%, respectively. And the latter one fully utilizing responses throughout the swept band, proves superior in identifying similar substances. This sensor technology helps promote the sensitive detection and accurate classification of diverse VOCs.

17.
Sci Bull (Beijing) ; 69(12): 1936-1953, 2024 Jun 30.
Artículo en Inglés | MEDLINE | ID: mdl-38734583

RESUMEN

Molecular glues are typically small chemical molecules that act at the interface between a target protein and degradation machinery to trigger ternary complex formation. Identifying molecular glues is challenging. There is a scarcity of target-specific upregulating molecular glues, which are highly anticipated for numerous targets, including P53. P53 is degraded in proteasomes through polyubiquitination by specific E3 ligases, whereas deubiquitinases (DUBs) remove polyubiquitination conjugates to counteract these E3 ligases. Thus, small-molecular glues that enhance P53 anchoring to DUBs may stabilize P53 through deubiquitination. Here, using small-molecule microarray-based technology and unbiased screening, we identified three potential molecular glues that may tether P53 to the DUB, USP7, and elevate the P53 level. Among the molecular glues, bromocriptine (BC) is an FDA-approved drug with the most robust effects. BC was further verified to increase P53 stability via the predicted molecular glue mechanism engaging USP7. Consistent with P53 upregulation in cancer cells, BC was shown to inhibit the proliferation of cancer cells in vitro and suppress tumor growth in a xenograft model. In summary, we established a potential screening platform and identified potential molecular glues upregulating P53. Similar strategies could be applied to the identification of other types of molecular glues that may benefit drug discovery and chemical biology studies.


Asunto(s)
Proteína p53 Supresora de Tumor , Peptidasa Específica de Ubiquitina 7 , Regulación hacia Arriba , Peptidasa Específica de Ubiquitina 7/metabolismo , Peptidasa Específica de Ubiquitina 7/genética , Proteína p53 Supresora de Tumor/metabolismo , Proteína p53 Supresora de Tumor/genética , Humanos , Animales , Regulación hacia Arriba/efectos de los fármacos , Ratones , Línea Celular Tumoral , Ubiquitinación/efectos de los fármacos , Proliferación Celular/efectos de los fármacos , Ensayos Antitumor por Modelo de Xenoinjerto , Ratones Desnudos
18.
Transl Vis Sci Technol ; 13(4): 28, 2024 Apr 02.
Artículo en Inglés | MEDLINE | ID: mdl-38648051

RESUMEN

Purpose: Retinal and optic nerve diseases have become the primary cause of irreversible vision loss and blindness. However, there is still a lack of thorough evaluation regarding their prevalence in China. Methods: This artificial intelligence-based national screening study applied a previously developed deep learning algorithm, named the Retinal Artificial Intelligence Diagnosis System (RAIDS). De-identified personal medical records from January 2019 to December 2021 were extracted from 65 examination centers in 19 provinces of China. Crude prevalence and age-sex-adjusted prevalence were calculated by mapping to the standard population in the seventh national census. Results: In 2021, adjusted referral possible glaucoma (63.29, 95% confidence interval [CI] = 57.12-68.90 cases per 1000), epiretinal macular membrane (21.84, 95% CI = 15.64-29.22), age-related macular degeneration (13.93, 95% CI = 11.09-17.17), and diabetic retinopathy (11.33, 95% CI = 8.89-13.77) ranked the highest among 10 diseases. Female participants had significantly higher adjusted prevalence of pathologic myopia, yet a lower adjusted prevalence of diabetic retinopathy, referral possible glaucoma, and hypertensive retinopathy than male participants. From 2019 to 2021, the adjusted prevalence of retinal vein occlusion (0.99, 95% CI = 0.73-1.26 to 1.88, 95% CI = 1.42-2.44), macular hole (0.59, 95% CI = 0.41-0.82 to 1.12, 95% CI = 0.76-1.51), and hypertensive retinopathy (0.53, 95% CI = 0.40-0.67 to 0.77, 95% CI = 0.60-0.95) significantly increased. The prevalence of diabetic retinopathy in participants under 50 years old significant increased. Conclusions: Retinal and optic nerve diseases are an important public health concern in China. Further well-conceived epidemiological studies are required to validate the observed increased prevalence of diabetic retinopathy, hypertensive retinopathy, retinal vein occlusion, and macular hole nationwide. Translational Relevance: This artificial intelligence system can be a potential tool to monitor the prevalence of major retinal and optic nerve diseases over a wide geographic area.


Asunto(s)
Inteligencia Artificial , Enfermedades del Nervio Óptico , Enfermedades de la Retina , Humanos , China/epidemiología , Prevalencia , Masculino , Femenino , Persona de Mediana Edad , Adulto , Anciano , Enfermedades de la Retina/epidemiología , Enfermedades de la Retina/diagnóstico , Enfermedades del Nervio Óptico/epidemiología , Enfermedades del Nervio Óptico/diagnóstico , Adulto Joven , Adolescente , Tamizaje Masivo/métodos , Anciano de 80 o más Años
19.
Artículo en Inglés | MEDLINE | ID: mdl-38578856

RESUMEN

Accurate screening of cancer types is crucial for effective cancer detection and precise treatment selection. However, the association between gene expression profiles and tumors is often limited to a small number of biomarker genes. While computational methods using nature-inspired algorithms have shown promise in selecting predictive genes, existing techniques are limited by inefficient search and poor generalization across diverse datasets. This study presents a framework termed Evolutionary Optimized Diverse Ensemble Learning (EODE) to improve ensemble learning for cancer classification from gene expression data. The EODE methodology combines an intelligent grey wolf optimization algorithm for selective feature space reduction, guided random injection modeling for ensemble diversity enhancement, and subset model optimization for synergistic classifier combinations. Extensive experiments were conducted across 35 gene expression benchmark datasets encompassing varied cancer types. Results demonstrated that EODE obtained significantly improved screening accuracy over individual and conventionally aggregated models. The integrated optimization of advanced feature selection, directed specialized modeling, and cooperative classifier ensembles helps address key challenges in current nature-inspired approaches. This provides an effective framework for robust and generalized ensemble learning with gene expression biomarkers. Specifically, we have opened EODE source code on Github at https://github.com/wangxb96/EODE.

20.
Front Immunol ; 15: 1374763, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38596682

RESUMEN

Background: Psoriasis is an immune-mediated disorder influenced by environmental factors on a genetic basis. Despite advancements, challenges persist, including the diminishing efficacy of biologics and small-molecule targeted agents, alongside managing recurrence and psoriasis-related comorbidities. Unraveling the underlying pathogenesis and identifying valuable biomarkers remain pivotal for diagnosing and treating psoriasis. Methods: We employed a series of bioinformatics (including single-cell sequencing data analysis and machine learning techniques) and statistical methods to integrate and analyze multi-level data. We observed the cellular changes in psoriatic skin tissues, screened the key genes Fatty acid binding protein 5 (FABP5) and The killer cell lectin-like receptor B1 (KLRB1), evaluated the efficacy of six widely prescribed drugs on psoriasis treatment in modulating the dendritic cell-associated pathway, and assessed their overall efficacy. Finally, RT-qPCR, immunohistochemistry, and immunofluorescence assays were used to validate. Results: The regulatory influence of dendritic cells (DCs) on T cells through the CD70/CD27 signaling pathway may emerge as a significant facet of the inflammatory response in psoriasis. Notably, FABP5 and KLRB1 exhibited up-regulation and co-localization in psoriatic skin tissues and M5-induced HaCaT cells, serving as potential biomarkers influencing psoriasis development. Conclusion: Our study analyzed the impact of DC-T cell crosstalk in psoriasis, elucidated the characterization of two biomarkers, FABP5 and KLRB1, in psoriasis, and highlighted the promise and value of tofacitinib in psoriasis therapy targeting DCs.


Asunto(s)
Psoriasis , Humanos , Psoriasis/tratamiento farmacológico , Piel/patología , Queratinocitos/metabolismo , Biomarcadores/metabolismo , Células Dendríticas/metabolismo , Proteínas de Unión a Ácidos Grasos/genética , Proteínas de Unión a Ácidos Grasos/metabolismo , Subfamilia B de Receptores Similares a Lectina de Células NK/metabolismo
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