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1.
Cancer Lett ; 605: 217290, 2024 Oct 11.
Artículo en Inglés | MEDLINE | ID: mdl-39396705

RESUMEN

Although it is an effective treatment for acute myeloid leukemia (AML), chemotherapy leads to myelosuppression and poor hematopoietic reconstruction. Hematopoiesis is regulated by bone marrow (BM) endothelial cells (ECs), and BM ECs are dysfunctional in acute leukemia patients with poor hematopoietic reconstitution after allogenic hematopoietic stem cell transplantation. Thus, it is crucial to explore the underlying mechanism of EC impairment and establish strategies for targeted therapy. TGF-ß signaling was found to be upregulated in ECs from AML patients in complete remission (CR ECs) and led to CR EC damage. Administration of a TGF-ß inhibitor rescued the dysfunction of ECs caused by TGF-ß1 expression in vitro, especially their hematopoiesis-supporting ability. Moreover, inhibition of TGF-ß expression repaired the BM EC damage triggered by chemotherapy in both AML patients in vitro and in an AML-CR murine model, and restored normal hematopoiesis without promoting AML progression. Mechanistically, our data reveal alterations in the transcriptomic pattern of damaged BM ECs, accompanied by the overexpression of downstream molecules TGF-ßR1, pSmad2/3, and functional genes related to adhesion, angiogenesis suppression and pro-apoptosis. Collectively, our findings reveal for the first time that the activation of TGF-ß signaling leads to BM EC dysfunction and poor hematopoietic reconstitution. Targeting TGF-ß represents a potential therapeutic strategy to promote multilineage hematopoiesis, thereby benefiting more cancer patients who suffer from myelosuppression after chemotherapy.

2.
Am J Reprod Immunol ; 92(4): e13942, 2024 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-39422056

RESUMEN

PROBLEM: Pregnancy complications such as spontaneous abortion, preeclampsia, and preterm birth persist, despite current interventions aimed at their prevention and treatment largely proving unsuccessful. Interleukin-27 (IL-27), composed of p28 and EBI3 subunits, binds to IL-27R, which consists of gp130 and IL-27Rα (also known as WSX-1 or TCCR), and plays a pivotal role in tumor development and inflammation regulation. At the maternal-fetal interface, IL-27 expression has been detected in trophoblasts, endometrial stromal cells, and decidual cells. Abnormal levels of IL-27/IL-27R have been linked to adverse pregnancy outcomes, including spontaneous miscarriage, preeclampsia, and preterm birth. This review aims to explore the expression of IL-27 at the maternal-fetal interface and its signaling pathway, uncovering the complex role of IL-27 in pregnancy complications. METHOD OF STUDY: A comprehensive literature review was conducted using PubMed/Medline, Scopus, and Embase databases, analyzing studies on IL-27 expression and its signaling pathways at the maternal-fetal interface. The review focused on identifying the presence of IL-27 in various cell types and linking abnormal IL-27/IL-27R expression to pregnancy complications such as spontaneous miscarriage, preeclampsia, and preterm birth. DISCUSSION AND CONCLUSION: IL-27 plays a complex role at the maternal-fetal interface, with abnormal expression linked to several pregnancy complications. These findings highlight the need for further research to elucidate IL-27's mechanisms and develop targeted interventions. Future studies should aim to develop targeted interventions and improve therapeutic strategies for managing pregnancy complications.


Asunto(s)
Complicaciones del Embarazo , Transducción de Señal , Trofoblastos , Humanos , Embarazo , Femenino , Trofoblastos/inmunología , Trofoblastos/metabolismo , Complicaciones del Embarazo/inmunología , Complicaciones del Embarazo/metabolismo , Animales , Receptores de Interleucina/metabolismo , Interleucina-27/metabolismo , Nacimiento Prematuro/inmunología , Aborto Espontáneo/inmunología , Aborto Espontáneo/metabolismo , Interleucinas
3.
Environ Monit Assess ; 196(9): 798, 2024 Aug 08.
Artículo en Inglés | MEDLINE | ID: mdl-39115708

RESUMEN

Watershed ecosystems play a pivotal role in maintaining the global carbon cycle and reducing global warming by serving as vital carbon reservoirs for sustainable ecosystem management. In this study, we based on the "quantity-mechanism-scenario" frameworks, integrate the MCE-CA-Markov and InVEST models to evaluate the spatiotemporal variations of carbon stocks in mid- to high-latitude alpine watersheds in China under historical and future climate scenarios. Additionally, the study employs the Geographic Detector model to explore the driving mechanisms influencing the carbon storage capacity of watershed ecosystems. The results showed that the carbon stock of the watershed increased by about 15.9 Tg from 1980 to 2020. Fractional Vegetation Cover (FVC), Digital Elevation Model (DEM), and Mean Annual Temperature (MAT) had the strongest explanatory power for carbon stocks. Under different climate scenarios, it was found that the SSP2-4.5 scenario had a significant rise in carbon stock from 2020 to 2050, roughly 24.1 Tg. This increase was primarily observed in the southeastern region of the watersheds, with forest and grassland effectively protected. Conversely, according to the SSP5-8.5 scenario, the carbon stock would decrease by about 50.53 Tg with the expansion of cultivated and construction land in the watershed's southwest part. Therefore, given the vulnerability of mid- to high-latitude mountain watersheds, global warming trends continue to pose a greater threat to carbon sequestration in watersheds. Our findings carry important implications for tackling potential ecological threats in mid- to high-latitude watersheds in the Northern Hemisphere and assisting policymakers in creating carbon sequestration plans, as well as for reducing climate change.


Asunto(s)
Carbono , Cambio Climático , Ecosistema , Monitoreo del Ambiente , China , Carbono/análisis , Secuestro de Carbono , Ciclo del Carbono , Conservación de los Recursos Naturales , Modelos Teóricos
4.
Biochim Biophys Acta Mol Basis Dis ; 1870(8): 167469, 2024 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-39153664

RESUMEN

Premature ovarian insufficiency (POI) critically affects female reproductive health, with obesity being a significant and recognized risk factor. Interleukin-27 (IL-27), known for its role in immune modulation and inflammation, has garnered attention in metabolic syndrome research. Nonetheless, the role of these immunometabolic factors on the initiation of POI remains to be unraveled. Our investigation delves into the influence of impaired IL-27 signaling on POI induction, particularly under the challenge of a high-fat diet (HFD). We analyzed patients' serum profiles and established a correlation of increased serum triglycerides with decreased IL-27 levels in POI cases. Experiments on C57BL/6 mice lacking the IL-27 receptor alpha (Il27ra-/-) revealed that when subjected to HFD, these mice developed hallmark POI symptoms. This includes escalated lipid deposition in both liver and ovarian tissues, increased ovarian macrophages cellular aging, and diminished follicle count, all pointing to compromised ovarian function. These findings unveil a novel pathway wherein impaired IL-27 signaling potentiates the onset of POI in the presence of HFD. Understanding the intricate interplay between IL-27, metabolic alterations, and immune dysregulation sheds light on potential therapeutic avenues for managing POI, offering hope for improved reproductive health outcomes.


Asunto(s)
Dieta Alta en Grasa , Macrófagos , Insuficiencia Ovárica Primaria , Receptores de Interleucina , Transducción de Señal , Adulto , Animales , Femenino , Humanos , Ratones , Senescencia Celular , Dieta Alta en Grasa/efectos adversos , Interleucinas/metabolismo , Macrófagos/metabolismo , Macrófagos/inmunología , Ratones Endogámicos C57BL , Ratones Noqueados , Ovario/metabolismo , Ovario/patología , Insuficiencia Ovárica Primaria/patología , Insuficiencia Ovárica Primaria/metabolismo , Insuficiencia Ovárica Primaria/inmunología , Receptores de Interleucina/metabolismo , Receptores de Interleucina/genética
5.
Int J Biol Macromol ; 278(Pt 3): 134947, 2024 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-39173803

RESUMEN

This study aimed to optimize the extraction of Hericium erinaceus polysaccharides (HEP) using ultrasound-assisted enzymatic extraction combined with Plackett-Burman design (PBD) and response surface methodology (RSM). The optimal extraction conditions were identified as: 33 min extraction time, 30:1 liquid to material ratio, 38 °C extraction temperature, 9 g/kg cellulase amount, pH 4, and 20 % ethanol concentration. Under these conditions, the extraction yield of HEP was 5.87 ± 0.16 %, consistent with the predicted results. Additionally, the potential immunomodulatory activity of HEP on RAW 264.7 macrophage was evaluated. The results revealed that HEP improved the immunostimulatory activity of RAW264.7 cells, evident from increased production of IL-6 and TNF-α. These findings suggest that HEP is capable of enhancing the immune activity of RAW 264.7 macrophage.


Asunto(s)
Hericium , Macrófagos , Ratones , Animales , Células RAW 264.7 , Macrófagos/efectos de los fármacos , Macrófagos/inmunología , Macrófagos/metabolismo , Hericium/química , Factores Inmunológicos/farmacología , Factores Inmunológicos/química , Factores Inmunológicos/aislamiento & purificación , Polisacáridos Fúngicos/farmacología , Polisacáridos Fúngicos/química , Polisacáridos Fúngicos/aislamiento & purificación , Agentes Inmunomoduladores/farmacología , Agentes Inmunomoduladores/química , Agentes Inmunomoduladores/aislamiento & purificación , Factor de Necrosis Tumoral alfa/metabolismo , Polisacáridos/farmacología , Polisacáridos/química , Polisacáridos/aislamiento & purificación , Interleucina-6/metabolismo
6.
Opt Lett ; 49(11): 3226-3229, 2024 Jun 01.
Artículo en Inglés | MEDLINE | ID: mdl-38824369

RESUMEN

We propose and demonstrate a data fragment multipath transmission scheme to achieve a secure optical communication based on polarization regulation. A dual-polarization Mach-Zehnder modulator (DPMZM) is driven by digital signals which are scattered by field-programmable gate array (FPGA) and transmitted in multiple paths. By utilizing two orthogonal polarization states, we have achieved a signal transmission under different optical parameters, and the transmission rate of the two paths can reach over 10 Gbps through a 20 km fiber with 2.5 Gbps hopping rate. In addition, we establish a theoretical model to analyze the security of the system and simulate brute force cracking; the probability of cracking the minimum information unit is 1.53 × 10-53. This proves that it is difficult to obtain a user data even using the fastest computers. Our scheme has provided, to our knowledge, a new approach for physical layer security.

7.
Biomed Chromatogr ; 38(8): e5943, 2024 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-38890009

RESUMEN

In this study, a targeted nanocarrier was developed by functionalizing graphene oxide with polyethyleneimine and folic acid, intended for loading oridonin. The nanocarrier was successfully synthesized and characterized using an ultraviolet spectrum, Fourier transform infrared spectroscopy and scanning electron microscopy. The nanocarrier demonstrated a remarkable oridonin loading capacity, reaching 424.8 µg/mg, as determined by ultra-high performance liquid chromatography. In vitro drug release experiments exhibited a pH-dependent release profile, with a higher cumulative release in an acidic environment. The release mechanism followed the Ritger-Peppas equation model. Cytotoxicity assays indicated minimal toxicity of the nanocarrier. Enhanced cellular uptake by MCF7 cells was observed for carriers functionalized with folate and polyethyleneimine. These findings highlight the potential of functionalized graphene oxide as a promising carrier for oridonin delivery in biomedical applications.


Asunto(s)
Neoplasias de la Mama , Diterpenos de Tipo Kaurano , Portadores de Fármacos , Grafito , Grafito/química , Diterpenos de Tipo Kaurano/química , Diterpenos de Tipo Kaurano/farmacología , Humanos , Células MCF-7 , Portadores de Fármacos/química , Neoplasias de la Mama/tratamiento farmacológico , Femenino , Antineoplásicos/farmacología , Antineoplásicos/química , Liberación de Fármacos , Supervivencia Celular/efectos de los fármacos , Ácido Fólico/química , Nanopartículas/química , Cromatografía Líquida de Alta Presión/métodos
8.
Research (Wash D C) ; 7: 0355, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38694202

RESUMEN

Proper timing of vigilance states serves fundamental brain functions. Although disturbance of sleep onset rapid eye movement (SOREM) sleep is frequently reported after orexin deficiency, their causal relationship still remains elusive. Here, we further study a specific subgroup of orexin neurons with convergent projection to the REM sleep promoting sublaterodorsal tegmental nucleus (OXSLD neurons). Intriguingly, although OXSLD and other projection-labeled orexin neurons exhibit similar activity dynamics during REM sleep, only the activation level of OXSLD neurons exhibits a significant positive correlation with the post-inter-REM sleep interval duration, revealing an essential role for the orexin-sublaterodorsal tegmental nucleus (SLD) neural pathway in relieving REM sleep pressure. Monosynaptic tracing reveals that multiple inputs may help shape this REM sleep-related dynamics of OXSLD neurons. Genetic ablation further shows that the homeostatic architecture of sleep/wakefulness cycles, especially avoidance of SOREM sleep-like transition, is dependent on this activity. A positive correlation between the SOREM sleep occurrence probability and depression states of narcoleptic patients further demonstrates the possible significance of the orexin-SLD pathway on REM sleep homeostasis.

9.
Adv Healthc Mater ; 13(20): e2304675, 2024 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-38688026

RESUMEN

The mitochondrial enzyme arginase-2 (Arg-2) is implicated in the pathophysiology of contrast-induced acute kidney injury (CI-AKI). Therefore, Arg-2 represents a candid target for CI-AKI prevention. Here, layer-by-layer (LbL) assembled renal-targeting polymeric nanoparticles are developed to efficiently deliver small interfering RNA (siRNA), knockdown Arg-2 expression in renal tubules, and prevention of CI-AKI is evaluated. First, near-infrared dye-loaded poly(lactic-co-glycolic acid) (PLGA) anionic cores are electrostatically coated with cationic chitosan (CS) to facilitate the adsorption and stabilization of Arg-2 siRNA. Next, nanoparticles are coated with anionic hyaluronan (HA) to provide protection against siRNA leakage and shielding against early clearance. Sequential electrostatic layering of CS and HA improves loading capacity of Arg-2 siRNA and yields LbL-assembled nanoparticles. Renal targeting and accumulation is enhanced by modifying the outermost layer of HA with a kidney targeting peptide (HA-KTP). The resultant kidney-targeting and siRNA loaded nanoparticles (PLGA/CS/HA-KTP siRNA) exhibit proprietary accumulation in kidneys and proximal tubular cells at 24 h post-tail vein injection. In iohexol-induced in vitro and in vivo CI-AKI models, PLGA/CS/HA-KTP siRNA delivery alleviates oxidative and nitrification stress, and rescues mitochondrial dysfunction while reducing apoptosis, thereby demonstrating a robust and satisfactory therapeutic effect. Thus, PLGA/CS/HA-KTP siRNA nanoparticles offer a promising candidate therapy to protect against CI-AKI.


Asunto(s)
Lesión Renal Aguda , Arginasa , Medios de Contraste , Nanopartículas , Copolímero de Ácido Poliláctico-Ácido Poliglicólico , ARN Interferente Pequeño , Nanopartículas/química , Lesión Renal Aguda/inducido químicamente , Lesión Renal Aguda/prevención & control , Lesión Renal Aguda/metabolismo , Animales , ARN Interferente Pequeño/química , Copolímero de Ácido Poliláctico-Ácido Poliglicólico/química , Medios de Contraste/química , Ratones , Arginasa/metabolismo , Arginasa/genética , Quitosano/química , Técnicas de Silenciamiento del Gen , Riñón/metabolismo , Riñón/efectos de los fármacos , Riñón/patología , Ácido Hialurónico/química , Masculino , Humanos , Ácido Láctico/química , Ácido Poliglicólico/química , Nanopartículas Capa por Capa
10.
Immun Ageing ; 21(1): 10, 2024 Jan 27.
Artículo en Inglés | MEDLINE | ID: mdl-38279177

RESUMEN

BACKGROUND: Age-related changes in the ovarian microenvironment are linked to impaired fertility in women. Macrophages play important roles in ovarian tissue homeostasis and immune surveillance. However, the impact of aging on ovarian macrophage function and ovarian homeostasis remains poorly understood. METHODS: Senescence-associated beta-galactosidase staining, immunohistochemistry, and TUNEL staining were used to assess senescence and apoptosis, respectively. Flow cytometry was employed to evaluate mitochondrial membrane potential (MMP) and apoptosis in granulosa cells lines (KGN), and macrophages phagocytosis. After a 2-month treatment with low molecular weight Chitosan (LMWC), ovarian tissues from mice were collected for comprehensive analysis. RESULTS: Compared with the liver and uterus, the ovary displayed accelerated aging in an age-dependent manner, which was accompanied by elevated levels of inflammatory factors and apoptotic cells, and impaired macrophage phagocytic activity. The aged KGN cells exhibited elevated reactive oxygen species (ROS) and apoptotic levels alongside decreased MMP. H2O2-induced aging macrophages showed reduced phagocytosis function. Moreover, there were excessive aging macrophages with impaired phagocytosis in the follicular fluid of patients with diminished ovarian reserve (DOR). Notably, LMWC administration alleviated ovarian aging by enhancing macrophage phagocytosis and promoting tissue homeostasis. CONCLUSIONS: Aging ovarian is characterized by an accumulation of aging and apoptotic granulosa cells, an inflammatory response and macrophage phagocytosis dysfunction. In turn, impaired phagocytosis of macrophage contributes to insufficient clearance of aging and apoptotic granulosa cells and the increased risk of DOR. Additionally, LMWC emerges as a potential therapeutic strategy for age-related ovarian dysfunction.

11.
Front Vet Sci ; 10: 1175848, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37138926

RESUMEN

With the rapid development of poultry industry and the highly intensive production management, there are an increasing number of stress factors in poultry production. Excessive stress will affect their growth and development, immune function, and induce immunosuppression, susceptibility to a variety of diseases, and even death. In recent years, increasing interest has focused on natural components extracted from plants, among which plant polysaccharides have been highlighted because of their various biological activities. Plant polysaccharides are natural immunomodulators that can promote the growth of immune organs, activate immune cells and the complement system, and release cytokines. As a green feed additive, plant polysaccharides can not only relieve stress and enhance the immunity and disease resistance of poultry, but also regulate the balance of intestinal microorganisms and effectively alleviate all kinds of stress faced by poultry. This paper reviews the immunomodulatory effects and molecular mechanisms of different plant polysaccharides (Atractylodes macrocephala Koidz polysaccharide, Astragalus polysaccharides, Taishan Pinus massoniana pollen polysaccharide, and alfalfa polysaccharide) in poultry. Current research results reveal that plant polysaccharides have potential uses as therapeutic agents for poultry immune abnormalities and related diseases.

12.
Nat Metab ; 5(4): 626-641, 2023 04.
Artículo en Inglés | MEDLINE | ID: mdl-37081161

RESUMEN

Ammonia production via glutamate dehydrogenase is inhibited by SIRT4, a sirtuin that displays both amidase and non-amidase activities. The processes underlying the regulation of ammonia removal by amino acids remain unclear. Here, we report that SIRT4 acts as a decarbamylase that responds to amino acid sufficiency and regulates ammonia removal. Amino acids promote lysine 307 carbamylation (OTCCP-K307) of ornithine transcarbamylase (OTC), which activates OTC and the urea cycle. Proteomic and interactome screening identified OTC as a substrate of SIRT4. SIRT4 decarbamylates OTCCP-K307 and inactivates OTC in an NAD+-dependent manner. SIRT4 expression was transcriptionally upregulated by the amino acid insufficiency-activated GCN2-eIF2α-ATF4 axis. SIRT4 knockout in cultured cells caused higher OTCCP-K307 levels, activated OTC, elevated urea cycle intermediates and urea production via amino acid catabolism. Sirt4 ablation decreased male mouse blood ammonia levels and ameliorated CCl4-induced hepatic encephalopathy phenotypes. We reveal that SIRT4 safeguards cellular ammonia toxicity during amino acid catabolism.


Asunto(s)
Aminoácidos , Amoníaco , Animales , Masculino , Ratones , Células Cultivadas , Proteómica , Urea/metabolismo
13.
Int J Med Sci ; 20(3): 392-405, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-36860682

RESUMEN

Background: Fetal growth restriction (FGR) is characterized by restricted fetal growth and dysregulated placental development. The etiology and pathogenesis still remain elusive. IL-27 shows multiple roles in regulating various biological processes, however, how IL-27 involves in placentation in FGR pregnancy hasn't been demonstrated. Methods: The levels of IL-27 and IL-27RA in FGR and normal placentae were determined by immunohistochemistry, western blot and RT-PCR. HTR-8/SVneo cells and Il27ra-/- murine models have been adopted to evaluate the effects of IL-27 on the bio-functions of trophoblast cells. GO enrichment and GSEA analysis were performed to explore the underlying mechanism. Findings: IL-27 and IL-27RA was lowly expressed in FGR placentae and administration of IL-27 on HTR-8/SVneo could promote its proliferation, migration and invasion. Comparing with wildtypes, Il27ra-/- embryos were smaller and lighter, and the placentae from which were poorly developed. In mechanism, the molecules of canonical Wnt/ß-catenin pathway (CCND1, CMYC, SOX9) were downregulated in Il27ra-/- placentae. In contrast, the expression of SFRP2 (negative regulator of Wnt) was increased. Overexpression of SFRP2 in vitro could impair trophoblast migration and invasion capacity. Interpretation: IL-27/IL-27RA negatively regulates SFRP2 to activate Wnt/ß-catenin, and thus promotes migration and invasion of trophoblasts during pregnancy. However, IL-27 deficiency may contribute to the development of FGR by restricting the Wnt activity.


Asunto(s)
Interleucina-27 , Embarazo , Femenino , Animales , Ratones , Humanos , Trofoblastos , beta Catenina/genética , Retardo del Crecimiento Fetal/genética , Placenta , Proliferación Celular/genética , Proteínas de la Membrana
14.
Biomed Chromatogr ; 37(5): e5603, 2023 May.
Artículo en Inglés | MEDLINE | ID: mdl-36781382

RESUMEN

The aim of this study was to prepare oridonin liposomes and evaluate the physicochemical characteristics and pharmacokinetics in rats. A three-level, three-factor Box-Behnken design was used to optimize the preparation of oridonin liposomes. A highly sensitive high-performance liquid chromatographic quantification method using ultraviolet detection was established and validated for the determination of oridonin in rat plasma. Twelve Sprague-Dawley rats were randomly assigned and injected with 15 mg/kg of oridonin or oridonin liposomes via the tail vein. Pharmacokinetic parameters were estimated using a compartmental modeling approach using PKsolver software. The optimum conditions were as follows: soybean phospholipids/cholesterol ratio, 3.9:1; soybean phospholipids/drug ratio, 8.5:1; and soybean phospholipid concentration, 1.1%. Under these conditions, the mean particle size, polydispersity index, zeta potential, and encapsulation efficiency of oridonin liposomes were 170.5 nm, 0.246, -30.3 mV, and 76.15%, respectively. The pharmacokinetic results showed that liposomes could significantly prolong the elimination half-life (from 2.88 ± 0.55 to 13.67 ± 3.52 h), increase the area under the concentration-time curve (from 1.65 ± 0.17 to 6.22 ± 0.83 µg h/ml), and decrease the clearance (from 6.62 ± 1.38 to 1.96 ± 0.24 L/kg h). The oridonin liposomes increased the elimination half-life and area under the concentration-time curve and provided a reference for the development of drugs with a short half-life.


Asunto(s)
Diterpenos de Tipo Kaurano , Liposomas , Ratas , Animales , Liposomas/química , Liposomas/farmacocinética , Ratas Sprague-Dawley , Diterpenos de Tipo Kaurano/farmacocinética , Fosfolípidos/química , Tamaño de la Partícula
15.
Reproduction ; 165(5): 543-555, 2023 05 01.
Artículo en Inglés | MEDLINE | ID: mdl-36809184

RESUMEN

In brief: Hypoxia is vital for the establishment of the maternal-fetal interface during early pregnancy. This study shows that decidual macrophages (dMφ) could be recruited and reside in decidua under the regulation of hypoxia/VEGFA-CCL2 axis. Abstract: Infiltration and residence of decidual macrophages (dMφ) are of great significance to pregnancy maintenance for their role in angiogenesis, placental development, and inducing immune tolerance. Besides, hypoxia has now been acknowledged as an important biological event at maternal-fetal interface in the first trimester. However, whether and how hypoxia regulates biofunctions of dMφ remain elusive. Herein, we observed increased expression of C-C motif chemokine ligand 2 (CCL2) and residence of macrophages in decidua compared to secretory-phase endometrium. Moreover, hypoxia treatment on stromal cells improved the migration and adhesion of dMφ. Mechanistically, these effects might be mediated by upregulated CCL2 and adhesion molecules (especially ICAM2 and ICAM5) on stromal cells in the presence of endogenous vascular endothelial growth factor-A (VEGFA) in hypoxia. These findings were also verified by recombinant VEGFA and indirect coculture, indicating that the interaction between stromal cells and dMφ in hypoxia condition may facilitate dMφ recruitment and residence. In conclusion, VEGFA derived from a hypoxic environment may manipulate CCL2/CCR2 and adhesion molecules to enhance the interactions between dMφ and stromal cells and thus contribute to the enrichment of macrophages in decidua early during normal pregnancy.


Asunto(s)
Decidua , Placenta , Embarazo , Femenino , Humanos , Placenta/metabolismo , Decidua/metabolismo , Factor A de Crecimiento Endotelial Vascular/metabolismo , Quimiotaxis , Ligandos , Macrófagos/metabolismo , Quimiocinas/metabolismo , Quimiocina CCL2/metabolismo
16.
Front Neurol ; 13: 963626, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-36203990

RESUMEN

Rett Syndrome (RTT, OMIM 312750), a unique rare neurodevelopmental disorder, mostly affects females and causes severe multi-disabilities including poor sleep. This meta-analysis systematically reviewed the polysomnographic (PSG) data of individuals with RTT on both sleep macrostructure and sleep respiratory indexes and compared them to literature normative values. Studies were collected from PubMed, Web of Science, PsycINFO, Ebsco, Scopus, and Cochrane Library till 26 April 2022. Across 13 included studies, the 134 selected RTT cases were mostly females being MECP2 (n = 41) and CDKL5 (n = 4) positive. They were further stratified by gene, age, and clinical features. Findings of comparison with literature normative values suggested shorter total sleep time (TST) and sleep onset latency (SOL), twice as long wake after sleep onset (WASO) with lower sleep efficiency (SEI) in RTT, as well as increased non-rapid eye movement stage 3 (stage N3) and decreased rapid eye movement sleep. Based on limited data per stratifications, we found in RTT cases <5 years old lower stage N3, and in RTT cases >5 years old less WASO and more WASO in the epileptic strata. However, meta-results generated from studies designed with comparison groups only showed lower stage N1 in RTT than in healthy comparison, together with similar SEI and stage N3 to primary snoring subjects. For sleep respiratory indexes, severe disordered sleep breathing was confirmed across roughly all RTT strata. We are the first study to meta-analyze PSG data of subjects with RTT, illustrating shorter TST and aberrant sleep staging in RTT that may vary with age or the presence of epilepsy. Severe nocturnal hypoxemia with apneic events was also demonstrated. More studies are needed to explore and elucidate the pathophysiological mechanisms of these sleep findings in the future. Systematic review registration: https://www.crd.york.ac.uk/prospero/display_record.php?RecordID=198099, identifier: CRD 42020198099.

17.
J Nurs Manag ; 30(7): 3350-3359, 2022 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-36056581

RESUMEN

AIM: This study aimed to investigate the effect of career identity on career success among Chinese male nurses and to examine the mediating role of work engagement in this relationship. BACKGROUND: Recently, with the development of the nursing career, male nurses take up a higher share and play a more important role in the nursing team. With its own particularity and advantages, this group's stability closely relates to the future of the nursing team. Therefore, promoting the career success of the male nurses is essential to the nursing team development. METHODS: The data were collected in China. A sample of 557 male nurses completed measures of career identity, work engagement and career success scale. Structural equation model was adopted to verify the research hypotheses. RESULTS: Career identity was significantly and positively related to male nurses' work engagement and career success (p < .01). And work engagement partially mediated the association between career identity and career success. CONCLUSION: Career identity is critical to predicting and enhancing male nurses' career success. Work engagement plays an intervening mechanism explaining how career identity promotes career success among male nurses. IMPLICATIONS FOR NURSING MANAGEMENT: Nursing management should minimize the impact of the traditional concept, implement the gender equality and provide moderate care for male nurses to facilitate balanced development of gender by upgrading the management system. The administrators should carry out skill training based on male nurses' features and the need of the department. Given full play to their respective advantages, male nurses will make great progress in professional development and achieve greater career identity and work engagement. Meanwhile, the further exploration of better incentive mechanism also makes sense in improving career identity and work engagement by the reform of performance appraisal mechanism and salary adjustment according to their ability.


Asunto(s)
Enfermeros , Compromiso Laboral , Masculino , Humanos , Estudios Transversales , China , Encuestas y Cuestionarios
18.
J Reprod Immunol ; 151: 103623, 2022 06.
Artículo en Inglés | MEDLINE | ID: mdl-35430461

RESUMEN

Appropriate decidualization is of great importance for embryo implantation, placental development and successful pregnancy. Although it has been well-acknowledged that decidualization relies on activation of progesterone-mediated signaling pathway, the exact mechanisms have not been elucidated. Here, we demonstrated that both IL-27 and IL27RA were highly expressed in decidua than those in endometrium during secretory phase. Estrogen plus progesterone significantly upregulated the expression of IL-27 and IL-27RA in endometrium stromal cells (ESCs). In addition, inhibiting IL-27 signaling with IL-27 neutralization antibody (anti-IL-27) suppressed the expression of decidualization-related molecules, receptors of estrogen (gene coded by ESR) and progesterone (PGR) induced by cAMP or estrogen plus progesterone. Similar results were obtained from Il27ra-/- (knockout of Il27ra) female mice. Moreover, knockout of Il27ra did not affect the estrus cycle and folliculogenesis in mice but reduced implantation rate with the impairing decidualization. Mechanistically, IL-27 upregulated the expression of ESR1, ESR2 and PGR in ESCs and DSCs, as well as the phosphorylation level of STAT3. In the presence of estrogen plus progesterone, treatment with ESCs with anti-IL-27 inhibited the activation of STAT3. Also, the expression of ESR, PGR was decreased in Il27ra-/- mice. In conclusion, these findings demonstrate that IL-27 upregulated by estrogen and progestogen promotes decidualization possibly through a STAT3-dominant pathway.


Asunto(s)
Interleucina-27 , Progesterona , Animales , Decidua , Endometrio/metabolismo , Estrógenos/metabolismo , Femenino , Humanos , Interleucina-27/metabolismo , Ratones , Placenta/metabolismo , Embarazo , Progesterona/metabolismo , Factor de Transcripción STAT3/genética , Factor de Transcripción STAT3/metabolismo , Células del Estroma/metabolismo
19.
Artículo en Inglés | MEDLINE | ID: mdl-35329122

RESUMEN

Rett syndrome (RTT) is a severe and rare neurodevelopmental disorder affecting mostly girls. In RTT, an impaired sleep pattern is a supportive criterion for the diagnosis, yet little is known regarding the sleep structure and sleep respiratory events. Aiming to delineate sleep by aggregating RTT case (series) data from published polysomnographic studies, seventy-four RTT cases were collected from eleven studies up until 6 February 2022 (PROSPERO: CRD 42020198099). We compared the polysomnographic data within RTT stratifications and to a typically developing population. MECP2 cases demonstrated shortened total sleep time (TST) with increased stage N3 and decreased REM sleep. In cases with CDKL5 mutations, TST was longer and they spent more time in stage N1 but less in stage N3 than those cases affected by MECP2 mutations and a typically developing population. Sleep-disordered breathing was confirmed by the abnormal apnea/hypopnea index of 11.92 ± 23.67/h TST in these aggregated cases. No association of sleep structure with chronological age was found. In RTT, the sleep macrostructure of MECP2 versus CDKL5 cases showed differences, particularly regarding sleep stage N3. A severe REM sleep propensity reduction was found. Aberrant sleep cycling, possibly characterized by a poor REM 'on switch' and preponderance in slow and high-voltage sleep, is proposed.


Asunto(s)
Síndrome de Rett , Síndromes de la Apnea del Sueño , Femenino , Humanos , Masculino , Mutación , Polisomnografía , Síndrome de Rett/genética
20.
J Nurs Manag ; 30(2): 428-438, 2022 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-34704641

RESUMEN

AIM: To explore the relationships among self-efficacy, information literacy, social support and career success of clinical nurses and identify factors influencing clinical nurses' career success in northwestern China. BACKGROUND: Understanding the influencing factors of career success is important for the professional development of nurses and the improvement of clinical nursing quality. Many influencing factors of career success have been identified, but there is no large-scale research on the relationships among self-efficacy, information literacy, social support and career success of clinical nurses based on Kaleidoscope Career Model. Studies examining the association of the four factors remain limited. METHODS: A total of 3011 clinical nurses from 30 hospitals in northwestern China were selected in the cross-sectional survey, and the response rate was 94.71%. The clinical nurses completed the online self-report questionnaires including self-efficacy, information literacy, social support rating scale and career success scale. The data were analysed by SPSS23.0 statistical software using t test, analysis of variance, Pearson's correlation and multiple linear regression. Structural equation model (SEM) was used to analyse the influencing factors of career success using Mplus 8.3. RESULTS: The career success of clinical nurses in northwestern China was at a medium level. The linear multivariate regression analysis showed that self-efficacy (ß = .513), social support (ß = .230), information support (ß = .106), information consciousness (ß = -.097), information knowledge (ß = .067), information ethics (ß = -.053), hospital grade (ß = .118), marital status (ß = -.071) and age (ß = -.037) entered regression equation of clinical nurses' career success (all P < .05). SEM results showed that the career success was negatively correlated with demographic characteristics and positively correlated with social support and self-efficacy. CONCLUSION: Demographic characteristics, self-efficacy, social support and information literacy are the influencing factors of nurses' career success, which should be considered in the process of promoting nurses' career success. IMPLICATIONS FOR NURSING MANAGEMENT: Nursing managers need to acknowledge the significance of nurses' career success both for the realization of their own value and for the improvement of clinical nursing quality. They should encourage nurses to enhance self-efficacy and render more social support through incentive policies and foster nurses' information literacy through information technology training so as to improve their career success.


Asunto(s)
Motivación , Autoeficacia , China , Estudios Transversales , Humanos , Encuestas y Cuestionarios
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