Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 118
Filtrar
Más filtros

Banco de datos
País/Región como asunto
Tipo del documento
Intervalo de año de publicación
1.
Development ; 148(14)2021 07 15.
Artículo en Inglés | MEDLINE | ID: mdl-34152408

RESUMEN

The development of ovarian follicles constitutes the foundation of female reproduction. The proliferation of granulosa cells (GCs) is a basic process required to ensure normal follicular development. However, the mechanisms involved in controlling GC cell cycle are not fully understood. Here, by performing gene expression profiling in the domestic pig (Sus scrofa), we showed that cell cycle arrest at G0/G1 phase is highly correlated with pathways associated with hypoxic stress and FOXO signalling. Specifically, the elevated proportion of GCs at the arrested G0/G1 phase was accompanied by increased nuclear translocation of FOXO1 under conditions of hypoxia both in vivo and in vitro. Furthermore, phosphorylation of 14-3-3 by the JNK kinase is required for hypoxia-mediated FOXO1 activation and the resultant G0/G1 arrest. Notably, a FOXO1 mutant without DNA-binding activity failed to induce G0/G1 arrest of GCs during hypoxia. Importantly, we identified a new target gene of FOXO1, namely TP53INP1, which contributes to suppression of the G1-S cell cycle transition in response to hypoxia. Furthermore, we demonstrated that the inhibitory effect of the FOXO1-TP53INP1 axis on the GC cell cycle is mediated through a p53-CDKN1A-dependent mechanism. These findings could provide avenues for the clinical treatment of human infertility caused by impaired follicular development.


Asunto(s)
Proteínas Portadoras/metabolismo , Puntos de Control del Ciclo Celular , Inhibidor p21 de las Quinasas Dependientes de la Ciclina/metabolismo , Proteína Forkhead Box O1/metabolismo , Proteínas de Choque Térmico/metabolismo , Hipoxia/metabolismo , Folículo Ovárico/metabolismo , Proteína p53 Supresora de Tumor/metabolismo , Proteínas Portadoras/genética , Ciclo Celular , División Celular , Proliferación Celular , Inhibidor p21 de las Quinasas Dependientes de la Ciclina/genética , Femenino , Proteína Forkhead Box O1/genética , Fase G1 , Células de la Granulosa/metabolismo , Proteínas de Choque Térmico/genética , Humanos , Hipoxia/genética , Fosforilación , Fase de Descanso del Ciclo Celular , Transducción de Señal , Proteína p53 Supresora de Tumor/genética
2.
Graefes Arch Clin Exp Ophthalmol ; 262(6): 1829-1838, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38197993

RESUMEN

PURPOSE: To investigate the effect of posterior keratometry (PK) on the accuracy of 10 intraocular lens (IOL) power calculation formulas using standard keratometry (K) and total keratometry (TK). METHODS: This is a retrospective consecutive case-series study. The IOL power was calculated using K and TK measured by IOLMaster 700 in 6 new-generation formulas (Barrett Universal II, Emmetropia Verifying Optical (EVO) 2.0, RBF Calculator 3.0, Hoffer QST, Kane, and Ladas Super Formula) and 4 traditional formulas (Haigis, Hoffer Q, Holladay 1, and SRK/T). The arithmetic prediction error (PE) and mean absolute PE (MAE) were evaluated. The locally-weighted scatterplot smoothing was performed to assess the relationship between PE and PK. RESULTS: A total of 576 patients (576 eyes) who underwent cataract surgery were included. Compared with using K, all formulas using TK showed a hyperopic shift in the whole group. Specifically, for eyes with PK exceeding -5.90 D, all formulas using TK exhibited a hyperopic shift (all P < 0.001), while eyes with PK less than -5.90 D showed a myopic shift (all P < 0.001). The MAE of new-generation formulas calculated with TK and K showed no statistical differences, while the MAE of traditional formulas with TK was larger (TK: 0.34 ~ 0.43 D; K: 0.33 ~ 0.42 D, all P < 0.05). CONCLUSIONS: The prediction bias of formulas with TK increased as PK deviated from -5.90 D. TK did not improve the prediction accuracy of new-generation formulas, and even performed worse in traditional formulas.


Asunto(s)
Biometría , Córnea , Lentes Intraoculares , Óptica y Fotónica , Refracción Ocular , Humanos , Estudios Retrospectivos , Refracción Ocular/fisiología , Femenino , Masculino , Biometría/métodos , Anciano , Córnea/diagnóstico por imagen , Reproducibilidad de los Resultados , Persona de Mediana Edad , Agudeza Visual/fisiología , Facoemulsificación/métodos , Anciano de 80 o más Años , Estudios de Seguimiento , Implantación de Lentes Intraoculares/métodos
3.
J Biol Chem ; 298(5): 101830, 2022 05.
Artículo en Inglés | MEDLINE | ID: mdl-35300979

RESUMEN

Owing to the avascular environment within ovarian follicles, granulosa cells (GCs) are believed to live in a hypoxic niche. Follicle-stimulating hormone (FSH)-mediated steroidogenesis is crucial for normal growth and maturation of ovarian follicles, but it remains unclear how FSH stimulates estradiol (E2) synthesis under hypoxic conditions. Here, we aimed to explore whether FSH affects the ATP production required for estrogen synthesis from the perspective of glucose metabolism. It was observed that the levels of both E2 and HIF-1α were markedly increased in a dose-dependent manner in mouse ovarian GCs after the injection of FSH in vivo, indicating that hypoxia/HIF-1α may be relevant to FSH-induced E2 synthesis. By treating hypoxic GCs with FSH in vitro, we further revealed that the activation of the AMP-activated protein kinase (AMPK)-GLUT1 pathway, which in turn stimulates ATP generation, may be essential for FSH-mediated E2 production during hypoxia. In contrast, inhibition of AMPK or GLUT1 with siRNAs/antagonist both repressed glycolysis, ATP production, and E2 synthesis despite FSH treatment. Moreover, blocking HIF-1α activity using siRNAs/PX-478 suppressed AMPK activation, GLUT1 expression, and E2 levels in FSH-treated GCs. Finally, the in vitro findings were verified in vivo, which showed markedly increased AMPK activity, GLUT1 expression, glycolytic flux, ATP levels, and E2 concentrations in ovarian GCs following FSH injection. Taken together, these findings uncovered a novel mechanism for FSH-regulating E2 synthesis in hypoxic GCs by activating glycolytic metabolism through the HIF-1α-AMPK-GLUT1 pathway.


Asunto(s)
Proteínas Quinasas Activadas por AMP , Estradiol , Proteínas Quinasas Activadas por AMP/genética , Proteínas Quinasas Activadas por AMP/metabolismo , Adenosina Trifosfato/metabolismo , Animales , Estradiol/metabolismo , Estradiol/farmacología , Femenino , Hormona Folículo Estimulante/metabolismo , Transportador de Glucosa de Tipo 1/genética , Transportador de Glucosa de Tipo 1/metabolismo , Glucólisis , Células de la Granulosa/metabolismo , Hipoxia/metabolismo , Ratones , Transducción de Señal
4.
Phys Rev Lett ; 131(26): 266101, 2023 Dec 29.
Artículo en Inglés | MEDLINE | ID: mdl-38215382

RESUMEN

The Grüneisen parameter (γ) is crucial for determining many thermal properties, including the anharmonic effect, thermostatistics, and equation of state of materials. However, the isentropic adiabatic compression conditions required to measure the Grüneisen parameter under high pressure are difficult to achieve. Thus, direct experimental Grüneisen parameter data in a wide range of pressures is sparse. In this work, we developed a new device that can apply pressure (up to tens of GPa) with an extremely short time of about 0.5 ms, confidently achieving isentropic adiabatic compression. Then, we applied our new technique to sodium chloride and measured its Grüneisen parameter, which conforms to previous theoretical predictions. According to our obtained sodium chloride Grüneisen parameters, the calculated Hugoniot curve of the NaCl B1 phase appears up to 20 GPa and 960 K, which compares very well with the shock compression experimental data by Fritz et al. and other calculation works. Our results suggest that this new method can reliably measure the Grüneisen parameter of even more materials, which is significant for researching the equation of state in substances.

5.
BMC Cancer ; 23(1): 5, 2023 Jan 03.
Artículo en Inglés | MEDLINE | ID: mdl-36597055

RESUMEN

BACKGROUND: It has been reported that inflammatory and nutritional markers are related to prognosis in numerous malignancies. The present study analyzed the significance of these markers' alterations during neoadjuvant chemotherapy in the long-term outcomes in patients with advanced gastric cancer. METHODS: A retrospective review was performed of 437 advanced gastric cancer patients who underwent a neoadjuvant chemotherapy (NACT) regimen followed by surgical treatment. Inflammatory and nutritional markers measured from the blood samples collected from the patients before the first neoadjuvant chemotherapy and after the last neoadjuvant chemotherapy were used for analysis. Statistical analysis, including Mann-Whitney U or chi-square tests, the Kaplan-Meier method and Cox multivariate analysis, were performed to analyze the predictive value of these markers for overall survival outcomes (OS). RESULTS: Most biomarkers, including lymphocyte, leucocyte, neutrophil, monocyte, platelet, LMR, PLR, SII, CRP, CAR, hemoglobulin and albumin levels, changed during NACT (P <  0.05). After separately grouping the patients based on the normal range of hematologic indexes and the change rate (α) of systemic inflammatory and nutritional markers by the cutoff value derived from X-tile (P <  0.05), we found that differentiation, TRG, pre-NACT BMI, pre-NACT platelet counts, post-NACT lymphocyte counts, the change in lymphocyte counts, change in platelet counts and LMR(α), PLR(α), SII(α), and CAR(α) were associated with OS. Multivariate analysis revealed that PLR (α) > - 19% was correlated with a 3.193-fold (95% CI: 2.194-4.649) higher risk of death (P <  0.001) than others. CONCLUSION: NACT could significantly change several inflammatory and nutritional markers in the perioperative period; the platelet counts before NACT, and the change in lymphocytes during NACT truly correlated with long-term outcomes among patients with advanced gastric cancer. The systemic inflammatory marker PLR may be a reliable marker for the prediction of prognosis.


Asunto(s)
Neoplasias Gástricas , Humanos , Pronóstico , Neoplasias Gástricas/tratamiento farmacológico , Linfocitos/patología , Recuento de Linfocitos , Neutrófilos/patología , Estudios Retrospectivos , Periodo Perioperatorio
6.
BMC Vet Res ; 19(1): 46, 2023 Feb 11.
Artículo en Inglés | MEDLINE | ID: mdl-36765329

RESUMEN

BACKGROUND: Porcine epidemic diarrhea (PED), caused by PED virus (PEDV), is a severe enteric disease burdening the global swine industry in recent years. Especially, the mortality of PED in neonatal piglets approaches 100%. Maternal antibodies in milk, particularly immunoglobulin A (IgA) antibodies, are of great importance for protection neonatal suckling piglets against PEDV infection as passive lactogenic immunity. Therefore, appropriate detection methods are required for detecting PEDV IgA antibodies in milk. In the current study, we prepared monoclonal antibodies (mAbs) against PEDV spike (S) glycoprotein. An enzyme-linked immunosorbent assay (ELISA) was subsequently developed based on PEDV antigen capture by a specific anti-S mAb. RESULTS: The developed ELISA showed high sensitivity (the maximum dilution of milk samples up to 1:1280) and repeatability (coefficient of variation values < 10%) in detecting PEDV IgA antibody positive and negative milk samples. More importantly, the developed ELISA showed a high coincidence rate with a commercial ELISA kit for PEDV IgA antibody detection in clinical milk samples. CONCLUSIONS: The developed ELISA in the current study is applicable for PEDV IgA antibody detection in milk samples, which is beneficial for evaluating vaccination efficacies and neonate immune status against the virus.


Asunto(s)
Infecciones por Coronavirus , Virus de la Diarrea Epidémica Porcina , Enfermedades de los Porcinos , Animales , Porcinos , Leche , Anticuerpos Antivirales , Antígenos Virales , Infecciones por Coronavirus/diagnóstico , Infecciones por Coronavirus/veterinaria , Infecciones por Coronavirus/prevención & control , Ensayo de Inmunoadsorción Enzimática/veterinaria , Ensayo de Inmunoadsorción Enzimática/métodos , Anticuerpos Monoclonales , Inmunoglobulina A
7.
Int J Mol Sci ; 24(8)2023 Apr 21.
Artículo en Inglés | MEDLINE | ID: mdl-37108824

RESUMEN

Recent studies have shown that the NOD-, LRR-, and pyrin domain-containing protein 3 (NLRP3) inflammasome is extensively activated in the process of intervertebral disc degeneration (IVDD), leading to the pyroptosis of nucleus pulposus cells (NPCs) and the exacerbation of the pathological development of the intervertebral disc (IVD). Exosomes derived from human embryonic stem cells (hESCs-exo) have shown great therapeutic potential in degenerative diseases. We hypothesized that hESCs-exo could alleviate IVDD by downregulating NLRP3. We measured the NLRP3 protein levels in different grades of IVDD and the effect of hESCs-exo on the H2O2-induced pyroptosis of NPCs. Our results indicate that the expression of NLRP3 was upregulated with the increase in IVD degeneration. hESCs-exo were able to reduce the H2O2-mediated pyroptosis of NPCs by downregulating the expression levels of NLRP3 inflammasome-related genes. Bioinformatics software predicted that miR-302c, an embryonic stem-cell-specific RNA, can inhibit NLRP3, thereby alleviating the pyroptosis of NPCs, and this was further verified by the overexpression of miR-302c in NPCs. In vivo experiments confirmed the above results in a rat caudal IVDD model. Our study demonstrates that hESCs-exo could inhibit excessive NPC pyroptosis by downregulating the NLRP3 inflammasome during IVDD, and miR-302c may play a key role in this process.


Asunto(s)
Exosomas , Células Madre Embrionarias Humanas , Degeneración del Disco Intervertebral , MicroARNs , Núcleo Pulposo , Humanos , Ratas , Animales , Inflamasomas/metabolismo , Proteína con Dominio Pirina 3 de la Familia NLR/genética , Proteína con Dominio Pirina 3 de la Familia NLR/metabolismo , Núcleo Pulposo/metabolismo , Piroptosis , Células Madre Embrionarias Humanas/metabolismo , Exosomas/metabolismo , Peróxido de Hidrógeno/metabolismo , Degeneración del Disco Intervertebral/genética , Degeneración del Disco Intervertebral/terapia , Degeneración del Disco Intervertebral/metabolismo , MicroARNs/metabolismo
8.
Int J Mol Sci ; 23(20)2022 Oct 18.
Artículo en Inglés | MEDLINE | ID: mdl-36293309

RESUMEN

Under stress conditions, luteinizing hormone (LH)-mediated ovulation is inhibited, resulting in insufficient oocyte production and excretion during follicular development. When the body is stressed, a large amount of corticosterone (CORT) is generated, which will lead to a disorder of the body's endocrine system and damage to the body. Our previous work showed that CORT can block follicular development in mice. Since LH acts through binding with the luteinizing hormone receptor (Lhcgr), the present study aimed to investigate whether and how corticosterone (CORT) influences Lhcgr expression in mouse ovarian granulosa cells (GCs). For this purpose, three-week-old ICR female mice were injected intraperitoneally with pregnant mare serum gonadotropin (PMSG). In addition, the treatment group was injected with CORT (1 mg/mouse) at intervals of 8 h and the control group was injected with the same volume of methyl sulfoxide (DMSO). GCs were collected at 24 h, 48 h, and 55 h after PMSG injection. For in vitro experiments, the mouse GCs obtained from healthy follicles were treated with CORT alone, or together with inhibitors against the glucocorticoid receptor (Nr3c1). The results showed that the CORT caused a downregulation of Lhcgr expression in GCs, which was accompanied by impaired cell viability. Moreover, the effect of the CORT was mediated by binding to its receptor (Nr3c1) in GCs. Further investigation revealed that Nr3c1 might regulate the transcription of Lhcgr through inhibiting the expression of Lhcgr transcription factors, including AP1 and Creb. Taken together, our findings suggested a possible mechanism of CORT-induced anovulation involving the inhibition of Lhcgr expression in GCs by the CORT-Nr3c1-AP1/Creb axis.


Asunto(s)
Corticosterona , Receptores de HL , Caballos , Femenino , Ratones , Animales , Receptores de HL/genética , Receptores de HL/metabolismo , Corticosterona/farmacología , Corticosterona/metabolismo , Gonadotropinas Equinas/metabolismo , Gonadotropinas Equinas/farmacología , Receptores de Glucocorticoides/metabolismo , Células de la Granulosa/metabolismo , Glucocorticoides/metabolismo , Dimetilsulfóxido/farmacología , Ratones Endogámicos ICR , Hormona Luteinizante/farmacología , Hormona Luteinizante/metabolismo , Receptores Acoplados a Proteínas G/metabolismo , Factores de Transcripción/metabolismo
9.
Sensors (Basel) ; 21(5)2021 Feb 25.
Artículo en Inglés | MEDLINE | ID: mdl-33668886

RESUMEN

Indoor autonomous navigation refers to the perception and exploration abilities of mobile agents in unknown indoor environments with the help of various sensors. It is the basic and one of the most important functions of mobile agents. In spite of the high performance of the single-sensor navigation method, multi-sensor fusion methods still potentially improve the perception and navigation abilities of mobile agents. This work summarizes the multi-sensor fusion methods for mobile agents' navigation by: (1) analyzing and comparing the advantages and disadvantages of a single sensor in the task of navigation; (2) introducing the mainstream technologies of multi-sensor fusion methods, including various combinations of sensors and several widely recognized multi-modal sensor datasets. Finally, we discuss the possible technique trends of multi-sensor fusion methods, especially its technique challenges in practical navigation environments.

10.
Nano Lett ; 20(1): 758-767, 2020 Jan 08.
Artículo en Inglés | MEDLINE | ID: mdl-31868367

RESUMEN

Bismuth (Bi) has been demonstrated as a promising anode for Na-ion batteries (NIBs) because it has high gravimetry (386 mA h g-1) and volumetric capacity (3800 mA h cm-3). However, Bi suffers from large volume expansion during sodiation, leading to poor electrochemical performance. The construction of a nanostructure with sufficient void space to accommodate the volume change has been proven effective for achieving prolonged cycling stability. However the excessive void space will definitely decrease the volumetric energy density of the battery. Herein, we design optimized Bi@Void@C nanospheres (Bi@Void@C-2) with yolk-shell structure that exhibit the best cycling performance and enhanced volumetric energy density. The optimized void space not only could buffer the volume change of the Bi nanosphere but also could keep the high volumetric energy density of the battery. The Bi@Void@C-2 shows an excellent rate capacity of 173 mA h g-1 at ultrahigh current density of 100 A g-1 and long-cycle life (198 mA h g-1 at 20 A g-1 over 10 000 cycles). The origin of the superior performance is achieved through in-depth fundamental studies during battery operation using in situ X-ray diffraction (XRD) and in situ transmission electron microscope (TEM), complemented by theoretical calculations and ex situ TEM observation. Our rational design provides insights for anode materials with large volume variation, especially for conversion type and alloying type mechanism materials for batteries (i.e., Li-ion batteries, Na-ion batteries).

11.
Yi Chuan ; 43(11): 1066-1077, 2021 Nov 20.
Artículo en Inglés | MEDLINE | ID: mdl-34815209

RESUMEN

Castration can reduce odor and fights in boars, but the carcass yield is reduced, and the intramuscular fat content is increased. Understanding its molecular mechanism is of great significance for production. Recent studies have shown that circular RNAs (circRNAs) play an important role(s) in the regulation of muscle development. To explore the effects of circRNAs on the development of longissimus dorsi (LD) muscle after castration, six Huainan male pigs were selected and three of which were randomly castrated. Six pigs were slaughtered when their body weight reached around 130 kg, and the LD muscle samples were collected. The differentially expressed circRNAs (DECs) were screened by high-throughput sequencing and functionally analyzed using the KEGG databases. DECs-miRNAs network was constructed, and the expression profiles of candidate circRNAs and their interactions with miRNAs were verified in porcine skeletal muscle satellite cells. The results showed that a total of 5866 circRNAs were obtained, and 370 DECs were identified in LD muscle between the castrated and intact groups (| log2Foldchange | > 1, padj <0.8). KEGG enrichment indicated that the parental genes for the DECs were mainly enriched in the pathways associated with muscle development, muscle fiber type transformation, and energy metabolism. There were 8 miRNAs and 69 circRNAs enriched in the DECs-miRNA network. circRNA_2241 and circRNA_4237 were selected for verification, which showed that these two circRNAs really existed and their expression profiles were consistent with the sequencing results. Further, preliminary analysis showed that circRNA_2241 interacted with miR-1, and testosterone promoted circRNA_2241 but inhibited miR-1 expression. These results confirmed that circRNAs might participate in the regulation of LD muscle development after castration by interacting with miRNAs, thereby providing new materials and references for analyses on the molecular mechanisms of castration on the regulation of muscle development.


Asunto(s)
MicroARNs , ARN Circular , Animales , Secuenciación de Nucleótidos de Alto Rendimiento , Masculino , MicroARNs/genética , Desarrollo de Músculos , Músculos , Porcinos/genética
12.
J Cell Biochem ; 120(6): 9564-9571, 2019 06.
Artículo en Inglés | MEDLINE | ID: mdl-30520131

RESUMEN

Long noncoding RNA (lncRNA) HAND2-AS1 is a well-characterized tumor suppressor in several types of malignancies, while its role in esophagus squamous cell carcinoma (ESCC) is unknown. In this study, we found that lncRNA HAND2-AS1 was downregulated, while microRNA-21 ( miRNA-21) was upregulated in tumor tissues than in adjacent healthy tissues of ESCC patients. Expression levels of lncRNA HAND2-AS1 and miRNA-21 were significantly and inversely correlated in tumor tissues but not in healthy tissues. Plasma levels of lncRNA HAND2-AS1 were lower in ESCC patients than in healthy controls, and downregulation of plasma lncRNA HAND2-AS1 distinguished early stage ESCC patients from healthy controls. lncRNA HAND2-AS1 overexpression resulted in downregulation of miRNA-21 in cells of ESCC cell lines and inhibited cell proliferation, migration, and invasion. miRNA-21 overexpression failed to affect lncRNA HAND2-AS1 expression but significantly attenuated the inhibitory effect of lncRNA HAND2-AS1 overexpression on cancer cell proliferation, migration, and invasion. Therefore, lncRNA HAND2-AS1 may inhibit cancer cell proliferation, migration, and invasion in ESCC by regulating miRNA-21.


Asunto(s)
Movimiento Celular/genética , Carcinoma de Células Escamosas de Esófago/genética , Carcinoma de Células Escamosas de Esófago/patología , Regulación Neoplásica de la Expresión Génica , MicroARNs/genética , ARN Largo no Codificante/metabolismo , Estudios de Casos y Controles , Línea Celular Tumoral , Proliferación Celular/genética , Regulación hacia Abajo/genética , Humanos , MicroARNs/metabolismo , Invasividad Neoplásica , Estadificación de Neoplasias
13.
Int J Mol Sci ; 20(5)2019 Mar 04.
Artículo en Inglés | MEDLINE | ID: mdl-30836719

RESUMEN

Circular RNA (circRNA) and long non-coding RNA (lncRNA) are known to participate in adipogenesis and myogenic differentiation, but their impact on porcine muscle traits is not well understood. We compared their expressional profiles in the longissimus dorsi muscle of Chinese Huainan pigs (HN, the fat type) and Western commercial Duroc×(Landrace×Yorkshire) (DLY, the thin type) pigs, and 854 mRNAs, 233 lncRNAs, and 66 circRNAs (p < 0.05 and |log2FoldChange|>1) were found to be differentially expressed. The differentially expressed mRNA and circRNA parental genes were enriched in the Wnt signaling pathway (adipogenesis), the transition between fast and slow fibers (myogenic differentiation), and alanine, aspartate and glutamate metabolism (pork flavor). The potential lncRNAs/circRNAs-miRNAs-mRNAs regulatory networks shared MYOD1, PPARD, miR-423-5p and miR-874, which were associated with skeletal muscle muscular proliferation, differentiation/regeneration and adipogenesis. Taken together, these differentially expressed non-coding RNAs may be involved in the molecular basis of muscle traits, acting as the competing endogenous RNA (ceRNA) for miRNAs.


Asunto(s)
MicroARNs/genética , ARN Largo no Codificante/genética , ARN/genética , Transcriptoma/genética , Adipogénesis/genética , Animales , Diferenciación Celular/genética , Perfilación de la Expresión Génica , Desarrollo de Músculos/genética , Músculo Esquelético/crecimiento & desarrollo , Músculo Esquelético/metabolismo , ARN Circular , ARN Mensajero/genética , Porcinos
14.
Exp Cell Res ; 361(2): 324-332, 2017 12 15.
Artículo en Inglés | MEDLINE | ID: mdl-29097182

RESUMEN

Mesenchymal stem-cell based therapies have been proposed as novel treatments for intervertebral disc (IVD) degeneration. The development of these treatment strategies, however, has been hindered by the incomplete understanding of the origin, biological properties of nucleus pulposus (NP) derived stem/progenitor cells and their effects on the IVD degeneration. The goal of this study is to explore the biological properties of NP stem/progenitor cells isolated from degenerated IVD (D-NPMSCs) regarding immunotype, proliferative capacity, multi-lineage differentiation abilities, and the expression of NP specific cell surface markers compared to human umbilical cord mesenchymal stem cells (UCMSCs). Our results indicate that although D-NPMSCs shared the mesenchymal stromal cells (MSCs) characteristics with UCMSCs, significant differences exist in phenotype signatures and biological capacities between D-NPMSCs and UCMSCs. D-NPMSCs expressed lower expression levels of CD29 and CD105, the phenotype markers of MSCs, and exhibited reduced proliferation capability and differentiation potentials, which might account for the distinct NP microenvironment and the poor capacity for disc regeneration. This study will lay a foundation for further understanding the mechanism of stem cell-based therapy for IVD degeneration.


Asunto(s)
Degeneración del Disco Intervertebral/patología , Disco Intervertebral/patología , Células Madre Mesenquimatosas/citología , Núcleo Pulposo/patología , Células Madre/patología , Cordón Umbilical/citología , Adolescente , Adulto , Biomarcadores/metabolismo , Ciclo Celular/genética , Diferenciación Celular , Proliferación Celular , Supervivencia Celular , Endoglina/genética , Endoglina/metabolismo , Femenino , Expresión Génica , Humanos , Integrina beta1/genética , Integrina beta1/metabolismo , Disco Intervertebral/metabolismo , Degeneración del Disco Intervertebral/genética , Degeneración del Disco Intervertebral/metabolismo , Masculino , Células Madre Mesenquimatosas/metabolismo , Núcleo Pulposo/metabolismo , Cultivo Primario de Células , Índice de Severidad de la Enfermedad , Células Madre/metabolismo , Cordón Umbilical/metabolismo
15.
BMC Genomics ; 18(1): 542, 2017 07 19.
Artículo en Inglés | MEDLINE | ID: mdl-28724410

RESUMEN

BACKGROUND: Long non-coding RNAs (lncRNAs) regulate adipose tissue metabolism, however, their function on testosterone deficiency related obesity in humans is less understood. For this research, intact and castrated male pigs are the best model animal because of their similar proportional organ sizes, cardiovascular systems and metabolic features. RESULTS: We identified lncRNAs in subcutaneous adipose tissue by deep RNA-sequencing using the intact and castrated Huainan male pigs. The results showed that castration reduced serum testosterone but increased body fatness-related traits (serum triglyceride levels, backfat thickness, intramuscular fat content, and adipocyte size). Meanwhile, 343 lncRNAs from subcutaneous adipose tissue were identified, including 223 intergenic lncRNAs (lincRNAs), 68 anti-sense lncRNAs, and 52 intronic lncRNAs. It was predicted that there were 416 recognition sites for C/EBPα in the 303 lncRNA promoter region, and 13 adipogenesis-promoting miRNAs and five adipogenesis-depressing miRNAs target these lncRNAs. Eighteen lncRNAs, including nine up- and nine down-regulated had more than 2-fold differential expression between the castrated and intact male pigs (q-value < 0.05). Functional analysis indicated that these 18 lncRNAs and their target genes were involved in fatty acid, insulin, and the adipocytokine signaling pathway. We further analyzed the features of a conserved mouse lncRNA gene ENSMUST00000189966 and found it mainly expressed in the cell nucleus and target the Nuclear Receptor Subfamily 2 Group F Member 2 (NR2F2) gene. In 3 T3-L1 cells, differentiation down-regulated their expression, but dihydrotestosterone (DHT) significantly up-regulated their expression in a concentration-dependent manner (P < 0.05). CONCLUSIONS: These results suggested that lncRNAs and their target genes might participated in the castration-induced fat deposition and provide a new therapeutic target for combatting testosterone deficiency-related obesity.


Asunto(s)
Secuenciación de Nucleótidos de Alto Rendimiento , Orquiectomía , ARN Largo no Codificante/genética , Análisis de Secuencia de ARN , Grasa Subcutánea/metabolismo , Animales , Masculino , ARN Mensajero/genética , Porcinos
16.
J Biochem Mol Toxicol ; 31(12)2017 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-29205955

RESUMEN

Oxidative stress (OS) plays an important role in the process of ovarian granulosa cell apoptosis and follicular atresia. The aim of this study was to select antioxidant against OS in ovary tissue. Firstly, we chose the six antioxidants and analyzed the reactive oxygen species (ROS) level in the ovary tissue. The results showed that proanthocyanidins, gallic acid, curcumin, and carotene decrease the ROS level compared with control group. We further demonstrated that both proanthocyanidins and gallic acid increase the antioxidant enzymes activity. Moreover, change in the ROS level was not observed in proanthocyanidins and gallic acid group of brain, liver, spleen, and kidney tissues. Finally, we found that proanthocyanidins and gallic acid inhibit pro-apoptotic genes expression in granulosa cells. Taken together, proanthocyanidins and gallic acid may be the most acceptable and optimal antioxidants specifically against ovarian OS and also may be involved in the inhibition of granulosa cells apoptosis in mouse ovary.


Asunto(s)
Antioxidantes/farmacología , Ácido Gálico/farmacología , Ovario/metabolismo , Estrés Oxidativo/efectos de los fármacos , Proantocianidinas/farmacología , Animales , Apoptosis , Proteínas Reguladoras de la Apoptosis/genética , Proteínas Reguladoras de la Apoptosis/metabolismo , Evaluación Preclínica de Medicamentos , Femenino , Expresión Génica/efectos de los fármacos , Ratones Endogámicos ICR , Ovario/efectos de los fármacos , Especies Reactivas de Oxígeno/metabolismo
17.
Int J Biol Macromol ; 255: 128187, 2024 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-37977467

RESUMEN

A combination of multiple methods can greatly intensify the removal efficiency of hazardous substances. Herein, the synergistic utilization of adsorption and catalysis achieved for the highly efficient removal of hexavalent chromium (Cr6+). A paper-based palladium nanoparticles/UiO-66-NH2 (PdNPs/UiO-66-NH2/LP) composite catalyst was prepared using lignocellulose paper-based material (LP) for the loading of UiO-66-NH2 MOFs materials, with the lignin in LP as the reducer for the in-situ synthesis of PdNPs (12.3 nm) on UiO-66-NH2 MOF materials. Lignocellulose paper-based materials with high strength (82 N·m/g) realized low-cost and environmentally friendly preparation and guaranteed the practicability of PdNPs/UiO-66-NH2/LP composite catalyst. The prepared PdNPs/UiO-66-NH2/LP achieved high-efficiency catalytic activity for hazardous Cr6+ removal through a constructed adsorption-catalytic synergistic system, in which the removal efficiency of Cr6+ in 10 min was increased by 2 times compared with a composite catalyst without MOFs loading. Finally, the PdNPs/UiO-66-NH2/LP composite catalyst demonstrated the great efficiency and practicality of water pollution treatment through synergistic adsorption enrichment and catalytic reduction.


Asunto(s)
Nanopartículas del Metal , Compuestos Organometálicos , Paladio , Adsorción , Lignina , Cromo , Catálisis
18.
ACS Appl Mater Interfaces ; 16(1): 869-877, 2024 Jan 10.
Artículo en Inglés | MEDLINE | ID: mdl-38146177

RESUMEN

Hybrid solid electrolyte (HSE) exhibits potential as a solid electrolyte due to its satisfactory Li+ conductivity, superior flexibility, and optimal interface compatibility. However, the inadequate wettability of the Li/HSE interface leads to significant contact impedance, thus fostering the formation of Li dendrites and limiting their practical applicability. Here, a straightforward strategy to enhance the interfacial wettability between Li and HSE and promote the uniform migration of Li+ by in situ construction of a multifunctional interface consisting of Li3P/LiCl (PCl@Li) was created. The Li3P component acts as a Li+ channel, banishing Li+ diffusion obstacles within the interface layer, while the electronically insulating LiCl component acts as an electron-blocking shield at the Li/HSE interface, promoting uniform Li+ deposition and preventing the formation of Li dendrites. The interface impedance of the symmetric PCl@Li|HSE|PCl@Li battery decreases markedly from 230.2 to 47.4 Ω cm-2. Additionally, the battery demonstrates superb cycling stability for over 1300 h at 0.1 mA cm-2 and maintains a minimal overpotential of 32 mV at 30 °C. The PCl@Li|HSE|LiFePO4 battery shows an initial discharge-specific capacity of 135.6 mA h g-1 at 1 C, with a notable capacity retention of 87.0% (118.0 mA h g-1) after 500 cycles. This work provides a new facile strategy for all-solid-state batteries to address interface issues between Li electrodes and HSE.

19.
Iran J Kidney Dis ; 1(1): 45-55, 2024 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-38308550

RESUMEN

\Introduction. There is a dispute regarding the roles of newly discovered lncRNAs in acute kidney injury (AKI). Therefore, this study discussed long non-coding RNA (lncRNA) small nuclear host gene 12 (SNHG12) in AKI and its molecular mechanism. METHODS: Lipopolysaccharide (LPS) induction was treated into renal tubular epithelial cells (HK-2 cells) to induce septic AKI in vitro. In the cell model, SNHG12, miR-1270, and tubulin beta class I (TUBB) expression patterns, along with p-p65, cleaved caspase-3, Beclin-1, p62, and autophagy related 7 (ATG7) protein expressions, were determined by reverse transcription quantitative real-time polymerase chain reaction (RT-qPCR) and Western blot. Cell viability was evaluated by cell counting kit-8 (CCK-8) and lactate dehydrogenase (LDH) cytotoxicity assay, while apoptosis and inflammation were assessed by flow cytometry and enzymelinked immunosorbent assay (ELISA), respectively. At last, the mechanistic interaction between SNHG12, miR-1270, and TUBB was identified. RESULTS: SNHG12 was highly expressed in LPS-induced HK-2 cells. Functionally, knocking down SNHG12 increased cell viability and autophagy, while inhibited LDH release, inflammation, and apoptosis. Mechanically, SNHG12 absorbed miR-1270 to upregulate TUBB expression, thereby aggravating inflammation, apoptosis, and inhibiting autophagy in AKI. CONCLUSION: SNHG12 promotes inflammation, apoptosis, and autophagy by targeting the miR-1270/TUBB axis in AKI.  DOI: 10.52547/ijkd.7903.


Asunto(s)
Lesión Renal Aguda , Apoptosis , Autofagia , MicroARNs , ARN Largo no Codificante , Humanos , Lesión Renal Aguda/metabolismo , Lesión Renal Aguda/patología , Apoptosis/genética , Autofagia/genética , Inflamación/genética , Lipopolisacáridos , MicroARNs/genética , ARN Largo no Codificante/genética , ARN Largo no Codificante/metabolismo
20.
J Public Health Dent ; 2024 Apr 29.
Artículo en Inglés | MEDLINE | ID: mdl-38684426

RESUMEN

OBJECTIVES: To evaluate parent knowledge and belief changes following the MySmileBuddy (MSB) early childhood caries (ECC) intervention. METHODS: Pre- and post-intervention surveys were completed by 669 parents of children with visually-evident ECC from among 977 participants in a 6-12-month pragmatic community-based caries management trial administered by community health workers (CHWs). Six domains of knowledge about caries and motivating and facilitating determinants were assessed via 26 survey items. Principal components analysis and reliability testing reduced dataset dimensionality. Parent and CHW characteristics were analyzed as potential moderators. Paired T-tests measured pre-to-post-intervention changes. Generalized estimating equations accounted for within-participant correlation with significance set at p < 0.05. RESULTS: Twenty items consolidated into five factors (saliva, hygiene, diet, seriousness/susceptibility, and outcome expectations). Six additional items were evaluated individually. Positive post-intervention changes (p < 0.0001) were observed across all factors and all but one individual item (tooth decay is very common). Greatest knowledge increases related to caries as a bacterial disease in two measures, the saliva factor and a single caries belief item tooth decay is an infectious disease (0.59 unit increase, 95% CI [0.55, 0.64] and 0.46 unit increase, 95% CI [0.4, 0.51], respectively), and in the value of fluoridated water over bottled (0.46 unit increase, 95% CI [0.39-0.53]). Most parents improved knowledge of ECC salivary (72%) and dietary risks (57%), and preventative hygiene behaviors (59%). CONCLUSIONS: MSB enhanced knowledge and beliefs about caries and confirmed hypothesized mediators of behavior change among parents of high-risk children. Engaging peer-like CHW interventionists may have moderated intervention effects, warranting further exploration.

SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA