Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 59
Filtrar
1.
Adv Sci (Weinh) ; 11(16): e2306174, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-38368261

RESUMEN

Patients with concurrent intrahepatic cholangiocarcinoma (ICC) and hepatolithiasis generally have poor prognoses. Hepatolithiasis is once considered the primary cause of ICC, although recent insights indicate that bacteria in the occurrence of hepatolithiasis can promote the progression of ICC. By constructing in vitro and in vivo ICC models and patient-derived organoids (PDOs), it is shown that Escherichia coli induces the production of a novel RNA, circGLIS3 (cGLIS3), which promotes tumor growth. cGLIS3 binds to hnRNPA1 and G3BP1, resulting in the assembly of stress granules (SGs) and suppression of hnRNPA1 and G3BP1 ubiquitination. Consequently, the IKKα mRNA is blocked in SGs, decreasing the production of IKKα and activating the NF-κB pathway, which finally results in chemoresistance and produces metastatic phenotypes of ICC. This study shows that a combination of Icaritin (ICA) and gemcitabine plus cisplatin (GP) chemotherapy can be a promising treatment strategy for ICC.


Asunto(s)
Neoplasias de los Conductos Biliares , Colangiocarcinoma , ADN Helicasas , Progresión de la Enfermedad , Escherichia coli , FN-kappa B , ARN Helicasas , Colangiocarcinoma/metabolismo , Colangiocarcinoma/genética , Colangiocarcinoma/patología , Humanos , FN-kappa B/metabolismo , FN-kappa B/genética , Escherichia coli/genética , Escherichia coli/metabolismo , Neoplasias de los Conductos Biliares/metabolismo , Neoplasias de los Conductos Biliares/genética , Neoplasias de los Conductos Biliares/patología , Animales , Ratones , Gránulos de Estrés/metabolismo , Gránulos de Estrés/genética , Transducción de Señal/genética , Desoxicitidina/análogos & derivados , Desoxicitidina/farmacología , Modelos Animales de Enfermedad , Gemcitabina , Proteínas con Motivos de Reconocimiento de ARN/metabolismo , Proteínas con Motivos de Reconocimiento de ARN/genética , Proteínas de Unión a Poli-ADP-Ribosa/metabolismo , Proteínas de Unión a Poli-ADP-Ribosa/genética
2.
Cancer Lett ; 586: 216666, 2024 Apr 01.
Artículo en Inglés | MEDLINE | ID: mdl-38311053

RESUMEN

Glioblastoma (GBM) is a highly aggressive and treatment-resistant brain tumor, necessitating novel therapeutic strategies. In this study, we present a mechanistic breakthrough by designing and evaluating a series of abiraterone-installed hydroxamic acids as potential dual inhibitors of CYP17A1 and HDAC6 for GBM treatment. We established the correlation of CYP17A1/HDAC6 overexpression with tumor recurrence and temozolomide resistance in GBM patients. Compound 12, a dual inhibitor, demonstrated significant anti-GBM activity in vitro, particularly against TMZ-resistant cell lines. Mechanistically, compound 12 induced apoptosis, suppressed recurrence-associated genes, induced oxidative stress and initiated DNA damage response. Furthermore, molecular modeling studies confirmed its potent inhibitory activity against CYP17A1 and HDAC6. In vivo studies revealed that compound 12 effectively suppressed tumor growth in xenograft and orthotopic mouse models without inducing significant adverse effects. These findings highlight the potential of dual CYP17A1 and HDAC6 inhibition as a promising strategy for overcoming treatment resistance in GBM and offer new hope for improved therapeutic outcomes.


Asunto(s)
Androstenos , Neoplasias Encefálicas , Glioblastoma , Esteroide 17-alfa-Hidroxilasa , Animales , Humanos , Ratones , Antineoplásicos Alquilantes/farmacología , Antineoplásicos Alquilantes/uso terapéutico , Neoplasias Encefálicas/tratamiento farmacológico , Neoplasias Encefálicas/genética , Neoplasias Encefálicas/patología , Línea Celular Tumoral , Daño del ADN , Resistencia a Antineoplásicos , Glioblastoma/tratamiento farmacológico , Glioblastoma/genética , Glioblastoma/patología , Histona Desacetilasa 6/genética , Ácidos Hidroxámicos/farmacología , Ácidos Hidroxámicos/uso terapéutico , Recurrencia Local de Neoplasia/tratamiento farmacológico , Estrés Oxidativo , Temozolomida/farmacología , Temozolomida/uso terapéutico , Ensayos Antitumor por Modelo de Xenoinjerto
3.
Diagnostics (Basel) ; 14(3)2024 Jan 25.
Artículo en Inglés | MEDLINE | ID: mdl-38337773

RESUMEN

Agenesis and hypoplasia affecting multiple flexor tendons within the same hand represent an exceedingly uncommon occurrence, with no previous studies addressing this condition. This report details a 4-year-old girl with agenesis of the right third and fourth fingers, who sought consultation due to the inability to flex her seemingly unaffected second and fifth fingers. Ultrasound examination revealed substantial thinning of the flexor tendons in the second to fifth digits, with a notable absence of attachment to the middle phalanx. In addition to flexor tendon hypoplasia, hypoplasia of the third and fourth middle phalanges was observed. Hand deformities featuring both finger agenesis and flexor tendon hypoplasia across multiple fingers were exceptionally rare. In such instances, ultrasound, in conjunction with radiography, emerges as the recommended initial imaging tool for comprehensive evaluation of both the phalangeal bones and flexor tendons.

4.
Biomed Opt Express ; 15(2): 965-972, 2024 Feb 01.
Artículo en Inglés | MEDLINE | ID: mdl-38404352

RESUMEN

Blood sugar is an important biomedical parameter of diabetic patients. The current blood sugar testing is based on an invasive method, which is not very friendly for patients who require long-term monitoring, while the non-invasive method is still in the developing stage. In this paper, we design a non-invasive and highly sensitive terahertz wave detector with Co3Sn2S2 semimetal thin film to test sugar concentration. As different concentrations have inconsistent responses to terahertz wave, we can deduce the concentration of the sugar solution to realize real-time highly sensitive detection of blood sugar concentration. This novel method can be further expanded to 6 G edge intelligence for non-invasive and real-time monitoring of blood sugar, and promote the development of 6 G technology.

5.
J Med Chem ; 67(4): 2963-2985, 2024 Feb 22.
Artículo en Inglés | MEDLINE | ID: mdl-38285511

RESUMEN

Structural analysis of tazemetostat, an FDA-approved EZH2 inhibitor, led us to pinpoint a suitable site for appendage with a pharmacophoric fragment of second-generation HSP90 inhibitors. Resultantly, a magnificent dual EZH2/HSP90 inhibitor was pinpointed that exerted striking cell growth inhibitory efficacy against TMZ-resistant Glioblastoma (GBM) cell lines. Exhaustive explorations of chemical probe 7 led to several revelations such as (i) compound 7 increased apoptosis/necrosis-related gene expression, whereas decreased M phase/kinetochore/spindle-related gene expression as well as CENPs protein expression in Pt3R cells; (ii) dual inhibitor 7 induced cell cycle arrest at the M phase; (iii) compound 7 suppressed reactive oxygen species (ROS) catabolism pathway, causing the death of TMZ-resistant GBM cells; and (iv) compound 7 elicited substantial in vivo anti-GBM efficacy in experimental mice xenografted with TMZ-resistant Pt3R cells. Collectively, the study results confirm the potential of dual EZH2-HSP90 inhibitor 7 as a tractable anti-GBM agent.


Asunto(s)
Antineoplásicos , Neoplasias Encefálicas , Glioblastoma , Animales , Ratones , Temozolomida/farmacología , Apoptosis , Resistencia a Antineoplásicos , Línea Celular Tumoral , Antineoplásicos/farmacología , Antineoplásicos/uso terapéutico , Antineoplásicos/química , Glioblastoma/metabolismo , Inhibidores Enzimáticos/farmacología , Neoplasias Encefálicas/tratamiento farmacológico
6.
Sci Rep ; 14(1): 747, 2024 01 07.
Artículo en Inglés | MEDLINE | ID: mdl-38185662

RESUMEN

Long non-coding RNAs (lncRNAs) have been shown to play crucial roles in response to aging processes. However, how lncRNAs regulate postharvest senescence of Sparassis latifolia (S. latifolia) with oriented polypropylene (OPP) film packing during cold storage remains unclear. In this study, we performed RNA-seq using the fruiting bodies of S. latifolia stored at 4 â„ƒ for 0, 8, 16 and 24 days after harvest, and profiled the lncRNA and mRNA transcriptome, respectively. In total, 1003 putative lncRNAs were identified, and there were 495, 483 and 162 differentially expressed (DE) lncRNAs, and 3680, 3941 and 1870 differentially expressed mRNAs after 8, 16 and 24 days of storage, respectively, compared to 0 day of storage. Target genes of differentially expressed lncRNAs were found to significantly associate with carbon and energy metabolism, response to abiotic stimulus, amino acid biosynthesis and metabolism, and protein synthesis and transcription. In addition, DE-lncRNA-mRNA co-expression networks in response to aging stress were also constructed. Taken together, these results confirm the regulatory role of lncRNAs in postharvest senescence of S. latifolia and will facilitate for improving preservation method.


Asunto(s)
Polyporales , ARN Largo no Codificante , ARN Largo no Codificante/genética , Criopreservación , ARN Mensajero/genética
7.
J Med Ultrasound ; 31(3): 258, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-38025008
8.
J Agric Food Chem ; 2023 Nov 06.
Artículo en Inglés | MEDLINE | ID: mdl-37930889

RESUMEN

The covalent interactions between proanthocyanidins (PAs) and pectin during thermal processing was investigated. An acid-butanol assay clearly showed that PAs were covalently bound to pectin. Computational studies indicated that a nucleophilic substitution reaction occurred between the carbocation generated by the PAs and carboxyl or hydroxyl groups on the pectin, leading to the formation of PAs-pectin adducts. Thermal processing and PAs significantly affected the physicochemical, functional, and biological properties of pectin. Thermal processing reduced the molecular weight and increased the gelling properties of pectin, whereas PAs increased both the molecular weight and the gelling properties. Finally, we found that the covalent attachment of PAs to pectin greatly enhanced its antioxidant, prebiotic, and α-glucosidase inhibitory activity. Overall, our results suggest that the thermal processing of fruits has the potential to induce a covalent interaction between PAs and pectin, which would impact the physicochemical characteristics and functional properties of pectin.

9.
Adv Sci (Weinh) ; 10(32): e2303814, 2023 11.
Artículo en Inglés | MEDLINE | ID: mdl-37789644

RESUMEN

Intrahepatic cholangiocarcinoma (ICC) is characterized by its dense fibrotic microenvironment and highly malignant nature, which are associated with chemotherapy resistance and very poor prognosis. Although circRNAs have emerged as important regulators in cancer biology, their role in ICC remains largely unclear. Herein, a circular RNA, cPKM is identified, which is upregulated in ICC and associated with poor prognosis. Silencing cPKM in ICC cells reduces TGFB1 release and stromal fibrosis, inhibits STMN1 expression, and suppresses ICC growth and metastasis, moreover, it also leads to overcoming paclitaxel resistance. This is regulated by the interactions of cPKM with miR-199a-5p or IGF2BP2 and by the ability of cPKM to stabilize STMN1/TGFB1 mRNA. Based on these findings, a Trojan horse nanotherapy strategy with co-loading of siRNA against cPKM (si-cPKM) and paclitaxel (PTX) is developed. The siRNA/PTX co-loaded nanosystem (Trojan horse) efficiently penetrates tumor tissues, releases si-cPKM and paclitaxel (soldiers), promotes paclitaxel sensitization, and suppresses ICC proliferation and metastasis in vivo. Furthermore, it alleviates the fibrosis of ICC tumor stroma and reopens collapsed tumor vessels (opening the gates), thus enhancing the efficacy of the standard chemotherapy regimen (main force). This novel nanotherapy provides a promising new strategy for ICC treatment.


Asunto(s)
Neoplasias de los Conductos Biliares , Colangiocarcinoma , Humanos , Línea Celular Tumoral , Colangiocarcinoma/tratamiento farmacológico , Colangiocarcinoma/genética , ARN Interferente Pequeño , Paclitaxel/uso terapéutico , Conductos Biliares Intrahepáticos/metabolismo , Conductos Biliares Intrahepáticos/patología , Neoplasias de los Conductos Biliares/tratamiento farmacológico , Neoplasias de los Conductos Biliares/genética , Fibrosis , Microambiente Tumoral , Factor de Crecimiento Transformador beta1/metabolismo , Proteínas de Unión al ARN , Estatmina/metabolismo
10.
Front Psychol ; 14: 1181187, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37609497

RESUMEN

Solomon's paradox is a widespread phenomenon regarding how we think, which asserts that people reason more wisely about other people's social problems than they do about their own. This means that we are more likely to make rational decisions when decision-making on the behalf of others than for ourselves, which has practical implications in the field of interpersonal conflicts and social dilemmas. However, it remains unclear whether Solomon's paradox exists across cultures, and the magnitude of its effect size. A meta-analysis was conducted, examining six studies and 20 effect sizes, to gain more insight into this phenomenon, considering the influencing effects of culture, measurement instrument, conflict type, and some other moderating factors. The results showed that Solomon's paradox does exist in interpersonal conflict (d = 0.317; 95% CI = 0.828-0.852). Moderator analysis revealed that measurement instrument and subjects had an impact on the effect of Solomon's paradox and there was a non-significant effect size of culture and conflict type. Future research should explore the diverse forms of Solomon's paradox across more diverse cultural contexts (e.g., various countries) to better understand the phenomenon and help people cope with life's problems more wisely.

11.
J Homosex ; : 1-19, 2023 May 31.
Artículo en Inglés | MEDLINE | ID: mdl-37256336

RESUMEN

Previous studies that have addressed the growing mental health problems among sexual minorities in mainland China, but failed to inform mental health programs and public health policies with consistent detection results. To obtain robust results on aggregate detection rates and moderators of these problems, we performed a meta-analysis of the related Chinese and English literature published before 2022. Ultimately, 305 eligible studies (ndepression = 127, nanxiety = 71, nsuicide ideation = 55, nsuicide plan = 13, nsuicide attempt = 39) were pooled in the analysis. The results revealed "Money boys" and people living with human immunodeficiency virus/acquired immunodeficiency syndrome (HIV/AIDS) had higher detection rates than general men who have sex with men. Depression was more prevalent in gays than lesbians, and the latter had a higher detection rate of suicide. Detection rates of anxiety and depression among sexual minorities in China were moderated by detection time, measurement tools, and their detection thresholds. Suggested future priorities include developing more targeted measurement tools that consider the living conditions and psychological characteristics of local sexual minorities, enhancing mental health programs for sexual minorities, and devising more practical and effective interventions to prevent and reduce their mental health problems.

12.
J Clin Med ; 12(9)2023 Apr 28.
Artículo en Inglés | MEDLINE | ID: mdl-37176624

RESUMEN

BACKGROUND: There remains uncertainty regarding optimal definitive management for malignant posterior circulation infarcts (MPCI). While guidelines recommend neurosurgery for malignant cerebellar infarcts that are refractory to medical therapy, concerns exist about the functional outcome and quality of life after decompressive surgery. OBJECTIVE: This study aims to evaluate the outcomes of surgical intervention compared to medical therapy in MPCI. METHODS: In this systematic review, MEDLINE, Embase and Cochrane databases were searched from inception until 2 April 2021. Studies were included if they involved posterior circulation strokes treated with neurosurgical intervention and reported mortality and functional outcome data. Data were collected according to PRISMA guidelines. RESULTS: The search yielded 6677 studies, of which 31 studies (comprising 723 patients) were included for analysis. From the included studies, we found that surgical therapy led to significant differences in mortality and functional outcomes in patients with severe disease. Neurological decline and radiological criteria were often used to decide the timing for surgical intervention, as there is currently limited evidence for preventative neurosurgery. There is also limited evidence for the superiority of one surgical modality over another. CONCLUSION: For patients with MPCI who are clinically stable at the time of presentation, in terms of mortality and functional outcome, surgical therapy appears to be equivocal to medical therapy. Reliable evidence is lacking, and further prospective studies are rendered.

13.
Food Res Int ; 163: 112123, 2023 01.
Artículo en Inglés | MEDLINE | ID: mdl-36596089

RESUMEN

This study fabricated a novel excipient emulsion by adding dark tea polysaccharides to improve the bioaccessibility of lycopene from tomatoes. Results indicated that addition of tea polysaccharides greatly increased the antioxidant activity of excipient emulsions. Additionally, tea polysaccharides markedly improved the physical stability of excipient emulsion when being mixed with tomato puree and passing through a simulated gastrointestinal tract, contributing to an increase in electrostatic and steric repulsion between the droplets. Besides, certain amount of tea polysaccharides (0.05 - 0.2 wt%) could increase the rate and extent of lipid digestion in tomato-emulsion mixtures. Finally, lycopene bioaccessibility was significantly increased (from 16.95 % to 26.21 %) when 0.1 wt% tea polysaccharides were included, which was mainly ascribed to the ability of tea polysaccharides to increase lipid digestion and reduce carotenoid oxidation within the gastrointestinal tract. These results suggest that well-designed excipient emulsions may increase carotenoids bioavailability in the complex food matrices.


Asunto(s)
Solanum lycopersicum , Licopeno , Emulsiones , Excipientes , Carotenoides , Suplementos Dietéticos/análisis , Lípidos ,
14.
Food Chem ; 401: 134156, 2023 Feb 01.
Artículo en Inglés | MEDLINE | ID: mdl-36099826

RESUMEN

Influences of conventional thermal and innovative non-thermal extraction methods on the physicochemical characteristics and properties of pectic polysaccharides from Choerospondias axillaris peels were investigated. Results showed that ultrasound-assisted extracted polysaccharides (UP) had a heterogeneous nature with lower molecular weight (127.7 kDa) and lower neutral sugar content (35.1%) but higher contents of protein (4.8%) and phenolic compounds (5.1%) than those of polysaccharides extracted by hot water (HP). Additionally, the monosaccharide composition results showed that glucose (77.8%) was the most abundant monosaccharide in HP, while arabinose (67.1%) was the most abundant monosaccharide in UP. The ultrasound significantly induced the degradation of polysaccharide chains but reduced the thermal degradation of phenolics. Finally, we found that UP had higher apparent viscosity, interfacial, emulsifying and antioxidant activity but lower α-glucosidase inhibition activity than those of HP. The results indicated that we could obtain polysaccharides with different functional and biological properties by using different extraction methods.


Asunto(s)
Anacardiaceae , Pectinas , Pectinas/química , Antioxidantes/química , alfa-Glucosidasas/metabolismo , Arabinosa , Anacardiaceae/química , Polisacáridos/química , Monosacáridos , Agua/química , Fenoles , Glucosa
15.
Int J Sex Health ; 35(1): 181-192, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-38596770

RESUMEN

Objective: Within the context of gender diversity, the concept of heterosexuality is also changing, emerging as a diversified sexual orientation and identity. This study aims to challenge the orthodoxy about heterosexuality by exploring the psychosocial characteristics and attitudes toward "fourth love" in China. Method: Two studies initially explored the current status of fourth love as a sexual minority. In Study 1, The Sex-Role Inventory and the Marital Attitude Scale were used to assess fourth-love (N = 144) and traditionally heterosexual participants' (N = 145) gender roles and marriage attitudes. In study 2, the Attitudes Toward the Fourth Love Scale was developed to assess college students' (N = 315) attitudes toward fourth-love men and women. Result: Fourth-love women often identify with masculine gender roles and significant differences were found between fourth-love and traditionally heterosexual women their gender roles. Fourth-love men identified with a neutral gender role, while there are significant differences between fourth-love men and traditionally heterosexual women in masculine gender roles. Fourth-love people's marriage attitudes were more negative than those of traditionally heterosexual people, especially for women. Various demographic factors influenced college students' attitudes toward the fourth love. Conclusion: As a sexual minority within the umbrella of heterosexuality in China, fourth-love individuals require further research attention and increased support.

16.
J Med Ultrasound ; 31(4): 340-341, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-38264594
18.
Spinal Cord Ser Cases ; 8(1): 78, 2022 09 01.
Artículo en Inglés | MEDLINE | ID: mdl-36050309

RESUMEN

INTRODUCTION: Neurofibromatosis type 1 (NF-1) is an autosomal-dominant disorder affecting 1 in 3000 individuals worldwide. NF-1 is characterized by café-au-lait macules and peripheral nerve sheath tumors. Patients with NF-1 frequently exhibit bony dysplasia, including spinal deformities such as scoliosis or kyphosis, pseudarthrosis of the tibia, and soft tissue tumors. Some patients with NF-1 exhibit spinal changes, including acutely angled cervical kyphosis. Prior studies have also described arteriovenous (AV) fistulas in individuals with NF-1, as well as a predisposition to cervical fistulas which display symptoms secondary to mass effect, rather than hemorrhage. Sometimes, fistulas are incidentally detected during evaluations for cervical kyphotic deformities. CASE PRESENTATION: The case herein describes a patient with NF-1 who exhibited a severe cervical spinal kyphotic deformity and a vertebral AV fistula. The patient initially presented with neck pain that radiated to all four limbs and resulted in limb weakness. DISCUSSION: Spinal kyphosis is common in patients with NF-1, and if dystrophic changes are noted on plain radiographs, MRI should be considered for the further survey of potential spinal vascular lesions.


Asunto(s)
Fístula Arteriovenosa , Cifosis , Neurofibromatosis 1 , Fístula Arteriovenosa/complicaciones , Fístula Arteriovenosa/diagnóstico por imagen , Fístula Arteriovenosa/patología , Vértebras Cervicales/diagnóstico por imagen , Vértebras Cervicales/patología , Humanos , Cifosis/complicaciones , Cifosis/diagnóstico por imagen , Neurofibromatosis 1/complicaciones , Neurofibromatosis 1/diagnóstico , Neurofibromatosis 1/patología , Cuadriplejía/complicaciones , Cuadriplejía/etiología
19.
Med Ultrason ; 24(3): 376-377, 2022 08 31.
Artículo en Inglés | MEDLINE | ID: mdl-36047416
20.
Nat Commun ; 13(1): 5454, 2022 Sep 27.
Artículo en Inglés | MEDLINE | ID: mdl-36167832

RESUMEN

Developing high-energy and efficient battery technologies is a crucial aspect of advancing the electrification of transportation and aviation. However, battery innovations can take years to deliver. In the case of non-aqueous battery electrolyte solutions, the many design variables in selecting multiple solvents, salts and their relative ratios make electrolyte optimization time-consuming and laborious. To overcome these issues, we propose in this work an experimental design that couples robotics (a custom-built automated experiment named "Clio") to machine-learning (a Bayesian optimization-based experiment planner named "Dragonfly"). An autonomous optimization of the electrolyte conductivity over a single-salt and ternary solvent design space identifies six fast-charging non-aqueous electrolyte solutions in two work-days and forty-two experiments. This result represents a six-fold time acceleration compared to a random search performed by the same automated experiment. To validate the practical use of these electrolytes, we tested them in a 220 mAh graphite∣∣LiNi0.5Mn0.3Co0.2O2 pouch cell configuration. All the pouch cells containing the robot-developed electrolytes demonstrate improved fast-charging capability against a baseline experiment that uses a non-aqueous electrolyte solution selected a priori from the design space.

SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA
...