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1.
Cell ; 186(16): 3350-3367.e19, 2023 08 03.
Artículo en Inglés | MEDLINE | ID: mdl-37421950

RESUMEN

Synucleinopathies are characterized by the accumulation of α-synuclein (α-Syn) aggregates in the brain. Positron emission tomography (PET) imaging of synucleinopathies requires radiopharmaceuticals that selectively bind α-Syn deposits. We report the identification of a brain permeable and rapid washout PET tracer [18F]-F0502B, which shows high binding affinity for α-Syn, but not for Aß or Tau fibrils, and preferential binding to α-Syn aggregates in the brain sections. Employing several cycles of counter screenings with in vitro fibrils, intraneuronal aggregates, and neurodegenerative disease brain sections from several mice models and human subjects, [18F]-F0502B images α-Syn deposits in the brains of mouse and non-human primate PD models. We further determined the atomic structure of the α-Syn fibril-F0502B complex by cryo-EM and revealed parallel diagonal stacking of F0502B on the fibril surface through an intense noncovalent bonding network via inter-ligand interactions. Therefore, [18F]-F0502B is a promising lead compound for imaging aggregated α-Syn in synucleinopathies.


Asunto(s)
Enfermedades Neurodegenerativas , Sinucleinopatías , Animales , Humanos , alfa-Sinucleína/metabolismo , Sinucleinopatías/diagnóstico por imagen , Sinucleinopatías/metabolismo , Enfermedades Neurodegenerativas/metabolismo , Tomografía de Emisión de Positrones , Encéfalo/diagnóstico por imagen , Encéfalo/metabolismo
2.
Cell ; 175(2): 442-457.e23, 2018 10 04.
Artículo en Inglés | MEDLINE | ID: mdl-30290143

RESUMEN

Antibody-dependent cellular cytotoxicity (ADCC) and antibody-dependent cellular phagocytosis (ADCP) critically contribute to the efficacy of anti-tumor therapeutic antibodies. We report here an unexpected finding that macrophages after ADCP inhibit NK cell-mediated ADCC and T cell-mediated cytotoxicity in breast cancers and lymphomas. Mechanistically, AIM2 is recruited to the phagosomes by FcγR signaling following ADCP and activated by sensing the phagocytosed tumor DNAs through the disrupted phagosomal membrane, which subsequently upregulates PD-L1 and IDO and causes immunosuppression. Combined treatment with anti-HER2 antibody and inhibitors of PD-L1 and IDO enhances anti-tumor immunity and anti-HER2 therapeutic efficacy in mouse models. Furthermore, neoadjuvant trastuzumab therapy significantly upregulates PD-L1 and IDO in the tumor-associated macrophages (TAMs) of HER2+ breast cancer patients, correlating with poor trastuzumab response. Collectively, our findings unveil a deleterious role of ADCP macrophages in cancer immunosuppression and suggest that therapeutic antibody plus immune checkpoint blockade may provide synergistic effects in cancer treatment.


Asunto(s)
Citotoxicidad Celular Dependiente de Anticuerpos/inmunología , Citofagocitosis/inmunología , Macrófagos/inmunología , Animales , Anticuerpos Monoclonales/uso terapéutico , Citotoxicidad Celular Dependiente de Anticuerpos/fisiología , Antígeno B7-H1/genética , Antígeno B7-H1/fisiología , Neoplasias de la Mama/inmunología , Neoplasias de la Mama/patología , Línea Celular Tumoral , Citofagocitosis/fisiología , Proteínas de Unión al ADN/fisiología , Modelos Animales de Enfermedad , Femenino , Humanos , Inmunoterapia , Células Asesinas Naturales/fisiología , Linfoma/inmunología , Macrófagos/fisiología , Ratones , Ratones Endogámicos NOD , Ratones SCID , Fagocitosis/inmunología , Fagocitosis/fisiología , Fagosomas/fisiología , Receptores de IgG/inmunología
3.
Proc Natl Acad Sci U S A ; 121(28): e2321193121, 2024 Jul 09.
Artículo en Inglés | MEDLINE | ID: mdl-38954549

RESUMEN

Iron antimonide (FeSb2) has been investigated for decades due to its puzzling electronic properties. It undergoes the temperature-controlled transition from an insulator to an ill-defined metal, with a cross-over from diamagnetism to paramagnetism. Extensive efforts have been made to uncover the underlying mechanism, but a consensus has yet to be reached. While macroscopic transport and magnetic measurements can be explained by different theoretical proposals, the essential spectroscopic evidence required to distinguish the physical origin is missing. In this paper, through the use of X-ray absorption spectroscopy and atomic multiplet simulations, we have observed the mixed spin states of 3d 6 configuration in FeSb2. Furthermore, we reveal that the enhancement of the conductivity, whether induced by temperature or doping, is characterized by populating the high-spin state from the low-spin state. Our work constitutes vital spectroscopic evidence that the electrical/magnetical transition in FeSb2 is directly associated with the spin-state excitation.

4.
Nature ; 583(7814): 133-138, 2020 07.
Artículo en Inglés | MEDLINE | ID: mdl-32528174

RESUMEN

Neutrophil extracellular traps (NETs), which consist of chromatin DNA filaments coated with granule proteins, are released by neutrophils to trap microorganisms1-3. Recent studies have suggested that the DNA component of NETs (NET-DNA) is associated with cancer metastasis in mouse models4-6. However, the functional role and clinical importance of NET-DNA in metastasis in patients with cancer remain unclear. Here we show that NETs are abundant in the liver metastases of patients with breast and colon cancers, and that serum NETs can predict the occurrence of liver metastases in patients with early-stage breast cancer. NET-DNA acts as a chemotactic factor to attract cancer cells, rather than merely acting as a 'trap' for them; in several mouse models, NETs in the liver or lungs were found to attract cancer cells to form distant metastases. We identify the transmembrane protein CCDC25 as a NET-DNA receptor on cancer cells that senses extracellular DNA and subsequently activates the ILK-ß-parvin pathway to enhance cell motility. NET-mediated metastasis is abrogated in CCDC25-knockout cells. Clinically, we show that the expression of CCDC25 on primary cancer cells is closely associated with a poor prognosis for patients. Overall, we describe a transmembrane DNA receptor that mediates NET-dependent metastasis, and suggest that targeting CCDC25 could be an appealing therapeutic strategy for the prevention of cancer metastasis.


Asunto(s)
Neoplasias de la Mama/patología , ADN/metabolismo , Trampas Extracelulares/genética , Proteínas de la Membrana/metabolismo , Metástasis de la Neoplasia/genética , Metástasis de la Neoplasia/patología , Neutrófilos/metabolismo , Actinina/metabolismo , Animales , Línea Celular Tumoral , Movimiento Celular , Femenino , Humanos , Hígado/patología , Neoplasias Hepáticas/patología , Neoplasias Hepáticas/secundario , Proteínas de la Membrana/genética , Ratones , Pronóstico , Proteínas Serina-Treonina Quinasas/metabolismo , Transducción de Señal
5.
Mol Psychiatry ; 29(2): 484-495, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-38102486

RESUMEN

Parent-child transmission of suicidal behaviors has been extensively studied, but the investigation of a three-generation family suicide risk paradigm remains limited. In this study, we aimed to explore the behavioral and brain signatures of multi-generational family history of suicidal behaviors (FHoS) in preadolescents, utilizing a longitudinal design and the dataset from Adolescent Brain and Cognitive DevelopmentSM Study (ABCD Study®), which comprised 4 years of data and includes a total of 9,653 preadolescents. Our findings revealed that multi-generational FHoS was significantly associated with an increased risk of problematic behaviors and suicidal behaviors (suicide ideation and suicide attempt) in offspring. Interestingly, the problematic behaviors were further identified as a mediator in the multi-generational transmission of suicidal behaviors. Additionally, we observed alterations in brain structure within superior temporal gyrus (STG), precentral/postcentral cortex, posterior parietal cortex (PPC), cingulate cortex (CC), and planum temporale (PT), as well as disrupted functional connectivity of default mode network (DMN), ventral attention network (VAN), dorsal attention network (DAN), fronto-parietal network (FPN), and cingulo-opercular network (CON) among preadolescents with FHoS. These results provide compelling longitudinal evidence at the population level, highlighting the associations between multi-generational FHoS and maladaptive behavioral and neurodevelopmental outcomes in offspring. These findings underscore the need for early preventive measures aimed at mitigating the familial transmission of suicide risk and reducing the global burden of deaths among children and adolescents.


Asunto(s)
Encéfalo , Ideación Suicida , Intento de Suicidio , Humanos , Femenino , Masculino , Niño , Adolescente , Intento de Suicidio/psicología , Estudios Longitudinales , Imagen por Resonancia Magnética/métodos , Suicidio/psicología , Factores de Riesgo
6.
J Transl Med ; 22(1): 267, 2024 03 11.
Artículo en Inglés | MEDLINE | ID: mdl-38468343

RESUMEN

BACKGROUND: Mitophagy, a prominent cellular homeostasis process, has been implicated in modulating endothelial cell function. Emerging evidence suggests that extracellular vesicles (EVs) participate in intercellular communication, which could modulate tumor angiogenesis, a hallmark of ovarian cancer (OC) progression. However, the underlying mechanisms through how EVs regulate endothelial mitophagy associated with tumor angiogenesis during OC development remain obscure. METHODS: The effect of cancer cell-derived EVs on endothelial mitophagy and its correlation with tumor angiogenesis and OC development were explored by in vitro and in vivo experiments. Multi-omics integration analysis was employed to identify potential regulatory mechanisms of cancer cell-derived EVs on endothelial mitophagy, which is involved in tumor angiogenesis associated with OC development. These insights were then further corroborated through additional experiments. An orthotopic OC mouse model was constructed to assess the antiangiogenic and therapeutic potential of the Indoleamine 2,3 dioxygenase-1 (IDO1) inhibitor. RESULTS: Cancer cell-derived EVs promoted tumor angiogenesis via the activation of endothelial mitophagy, contributing to the growth and metastasis of OC. The aberrantly high expression of IDO1 mediated abnormal tryptophan metabolism in cancer cells and promoted the secretion of L-kynurenine (L-kyn)-enriched EVs, with associated high levels of L-kyn in EVs isolated from both the tumor tissues and patient plasma in OC. EVs derived from IDO1high ovarian cancer cells elevated nicotinamide adenine dinucleotide (NAD +) levels in endothelial cells via delivering L-kyn. Besides, IDO1high ovarian cancer cell-derived EVs upregulated sirt3 expression in endothelial cells by increasing acetylation modification. These findings are crucial for promoting endothelial mitophagy correlated with tumor angiogenesis. Notably, both endothelial mitophagy and tumor angiogenesis could be suppressed by the IDO1 inhibitor in the orthotopic OC mouse model. CONCLUSIONS: Together, our findings unveil a mechanism of mitophagy in OC angiogenesis and indicate the clinical relevance of EV enriched L-kyn as a potential biomarker for tumorigenesis and progression. Additionally, IDO1 inhibitors might become an alternative option for OC adjuvant therapy.


Asunto(s)
Vesículas Extracelulares , Neoplasias Ováricas , Animales , Ratones , Humanos , Femenino , Quinurenina/metabolismo , Células Endoteliales/metabolismo , Angiogénesis , Mitofagia , Neovascularización Patológica , Vesículas Extracelulares/metabolismo , Indolamina-Pirrol 2,3,-Dioxigenasa/metabolismo
7.
Helicobacter ; 29(3): e13098, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38853394

RESUMEN

BACKGROUND: Potassium-competitive acid blockers have demonstrated enormous potential in the eradication treatment of Helicobacter pylori infection, with tegoprazan being one of the representatives. The available data on the safety and efficacy of tegoprazan in dual therapy are limited. MATERIALS AND METHODS: The multicenter, noninferiority, randomized-controlled trial was conducted from May 2023 to March 2024. Treatment-naive subjects were randomly assigned (1:1) to enter either the tegoprazan-amoxicillin (TA) group (tegoprazan 50 mg twice daily and amoxicillin 750 mg four times daily) or the esomeprazole-amoxicillin (EA) group (esomeprazole 20 mg and amoxicillin 750 mg all four times daily), with a duration for 14 days. The primary outcome was eradication rate as determined by 13C-urea breath test, including per-protocol (PP) analysis and intention-to-treat (ITT) analysis. Secondary outcomes were adverse events and compliance. RESULTS: A total of 368 individuals were included in the randomization. The eradication rates in the EA group and the TA group were 84.2% and 85.8%, respectively, according to an ITT analysis (p = 0.77), and 88.5% and 88.2%, respectively, according to PP analysis (p = 1.00). The eradication rates for the TA group were not inferior to those of the EA group in both PP (p = 0.0023) and ITT analyses (p = 0.0009). There were no significant statistical differences in the incidence of adverse events and compliance between the two groups. The multivariate logistic regression analysis revealed that poor compliance increased the risk of eradication failure (p < 0.001). CONCLUSIONS: Dual therapy containing tegoprazan is safe and effective to be considered as a clinical first-line treatment option, but further optimization involving antimicrobial susceptibility testing and adjustments in dosage and frequency is warranted. TRIAL REGISTRATION: ClinicalTrials.gov ID: NCT05870683.


Asunto(s)
Amoxicilina , Antibacterianos , Quimioterapia Combinada , Infecciones por Helicobacter , Helicobacter pylori , Humanos , Infecciones por Helicobacter/tratamiento farmacológico , Masculino , Femenino , Amoxicilina/uso terapéutico , Amoxicilina/administración & dosificación , Persona de Mediana Edad , Helicobacter pylori/efectos de los fármacos , Antibacterianos/uso terapéutico , Antibacterianos/administración & dosificación , Antibacterianos/efectos adversos , Adulto , Resultado del Tratamiento , Inhibidores de la Bomba de Protones/uso terapéutico , Inhibidores de la Bomba de Protones/administración & dosificación , Inhibidores de la Bomba de Protones/efectos adversos , Anciano , Pruebas Respiratorias , Esomeprazol/uso terapéutico , Esomeprazol/administración & dosificación , Pirroles , Sulfonamidas
8.
Ann Clin Microbiol Antimicrob ; 23(1): 71, 2024 Aug 10.
Artículo en Inglés | MEDLINE | ID: mdl-39127671

RESUMEN

Brucella spp. are facultative intracellular pathogens that cause zoonosis- brucellosis worldwide. There has been a trend of the re-emergence of brucellosis worldwide in recent years. The epidemic situation of brucellosis is serious in Xinjiang. To analyze the epidemic situation of Brucella spp. in Xinjiang among humans and animals, this study identified 144 Brucella isolates from Xinjiang using classical identification and 16 S rRNA sequencing. MLVA, drug resistance testing, and wgSNP detection were also performed. At the same time, analysis was conducted based on the published data of Brucella isolates worldwide. The results showed that the dominant species was B. melitensis biovar 3, which belonged to GT42 (MLVA-8 typing) and the East Mediterranean lineage. The correlation among isolates was high both in humans or animals. The isolates in Xinjiang exhibited higher polymorphism compared to other locations in China, with polymorphism increasing each year since 2010. No amikacin/kanamycin-resistant strains were detected, but six rifampicin-intermediate isolates were identified without rpoB gene variation. The NJ tree of the wgSNP results indicated that there were three main complexes of the B. melitensis epidemic in Xinjiang. Based on the results of this study, the prevention and control of brucellosis in Xinjiang should focus on B. melitensis, particularly strains belonging to B. melitensis bv.3 GT42 (MLVA-8 typing) and East Mediterranean lineage. Additionally, the rifampicin- and trimethoprim-sulfamethoxazole- resistance of isolates in Xinjiang should be closely monitored to avoid compromising the therapeutic efficacy and causing greater losses. These results provide essential data for the prevention and control of brucellosis in Xinjiang and China. Although the isolates from Xinjiang have significant characteristics among Chinese isolates and can reflect the epidemiological situation of brucellosis in China to some extent, this study cannot represent the characteristics of isolates from other regions.


Asunto(s)
Antibacterianos , Brucella melitensis , Brucelosis , Genotipo , Brucelosis/epidemiología , Brucelosis/microbiología , Brucella melitensis/genética , Brucella melitensis/efectos de los fármacos , Brucella melitensis/aislamiento & purificación , China/epidemiología , Humanos , Animales , Antibacterianos/farmacología , Farmacorresistencia Bacteriana/genética , Pruebas de Sensibilidad Microbiana , ARN Ribosómico 16S/genética , Filogenia , Polimorfismo Genético , Epidemias
9.
Ecotoxicol Environ Saf ; 275: 116246, 2024 Apr 15.
Artículo en Inglés | MEDLINE | ID: mdl-38537478

RESUMEN

Cadmium (Cd) pollution is considered a pressing challenge to eco-environment and public health worldwide. Although it has been well-documented that Cd exhibits various adverse effects on aquatic animals, it is still largely unknown whether and how Cd at environmentally relevant concentrations affects iron metabolism. Here, we studied the effects of environmental Cd exposure (5 and 50 µg/L) on iron homeostasis and possible mechanisms in common carp. The data revealed that Cd elevated serum iron, transferrin saturation and iron deposition in livers and spleens, leading to the disruption of systemic iron homeostasis. Mechanistic investigations substantiated that Cd drove hemolysis by compromising the osmotic fragility and inducing defective morphology of erythrocytes. Cd concurrently exacerbated hepatic inflammatory responses, resulting in the activation of IL6-Stat3 signaling and subsequent hepcidin transcription. Notably, Cd elicited ferroptosis through increased iron burden and oxidative stress in livers. Taken together, our findings provide evidence and mechanistic insight that environmental Cd exposure could undermine iron homeostasis via erythrotoxicity and hepatotoxicity. Further investigation and ecological risk assessment of Cd and other pollutants on metabolism-related effects is warranted, especially under the realistic exposure scenarios.


Asunto(s)
Carpas , Ferroptosis , Animales , Cadmio/metabolismo , Carpas/metabolismo , Hemólisis , Hígado , Inflamación/inducido químicamente , Inflamación/metabolismo , Homeostasis , Hierro/metabolismo
10.
Environ Toxicol ; 2024 Apr 10.
Artículo en Inglés | MEDLINE | ID: mdl-38597597

RESUMEN

Cervical squamous cell carcinoma (CESC), one of the most common malignancies in women, imposes a significant burden on women's health worldwide. Despite extensive research, the molecular and pathogenic mechanisms of cervical squamous cell carcinoma and CESC remain unclear. This study aimed to explore the immune-related genes, immune microenvironment infiltration, and prognosis of CESC, providing a theoretical basis for guiding clinical treatment. Initially, by mining four gene sets and immune-related gene sets from public databases, 14 immune-related genes associated with CESC were identified. Through univariate and multivariate COX regression analyses, as well as lasso regression analysis, four CESC-independent prognostic genes were identified, and a prognostic model was constructed, dividing them into high and low-risk groups. The correlation between these genes and immune cells and immune functions were explored through ssGSEA enrichment analysis, revealing a close association between the high-risk group and processes such as angiogenesis and epithelial-mesenchymal transition. Furthermore, using public databases and qRT-PCR experiments, significant differences in CXCL8 expression between normal cervical cells and cervical cancer cells were discovered. Subsequently, a CXCL8 knockdown plasmid was constructed, and the efficiency of CXCL8 knockdown was validated in two CESC cell lines, MEG-01 and HCE-1. Through CCK-8, scratch, and Transwell assays, it was confirmed that CXCL8 knockdown could inhibit the proliferation, invasion, and migration abilities of CESC cells. Targeting CXCL8 holds promise for personalized therapy for CESC, providing a strong theoretical basis for achieving clinical translation.

11.
Ren Fail ; 46(2): 2375033, 2024 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-38967135

RESUMEN

The Astragalus mongholicus Bunge and Panax notoginseng formula (A&P) has been clinically shown to effectively slow down the progression of chronic kidney disease (CKD) and has demonstrated significant anti-fibrosis effects in experimental CKD model. However, the specific active ingredients and underlying mechanism are still unclear. The active ingredients of A&P were analyzed by Ultra-high performance liquid chromatography-tandem mass spectrometry (UPLC-HR-MS). A mouse model of CKD was constructed by 5/6 nephrectomy. Renal function was assessed by creatinine and urea nitrogen. Real-time PCR and Western Blot were performed to detect the mRNA and protein changes in kidney and cells. An in vitro fibrotic cell model was constructed by TGF-ß induction in TCMK-1 cells. The results showed that thirteen active ingredients of A&P were identified by UPLC-HR-MS, nine of which were identified by analysis with standards, among which the relative percentage of NOB was high. We found that NOB treatment significantly improved renal function, pathological damage and reduced the expression level of fibrotic factors in CKD mice. The results also demonstrated that Lgals1 was overexpressed in the interstitial kidney of CKD mice, and NOB treatment significantly reduced its expression level, while inhibiting PI3K and AKT phosphorylation. Interestingly, overexpression of Lgals1 significantly increased fibrosis in TCMK1 cells and upregulated the activity of PI3K and AKT, which were strongly inhibited by NOB treatment. NOB is one of the main active components of A&P. The molecular mechanism by which NOB ameliorates renal fibrosis in CKD may be through the inhibition of Lgals1/PI3K/AKT signaling pathway.


Asunto(s)
Modelos Animales de Enfermedad , Medicamentos Herbarios Chinos , Fibrosis , Flavonas , Riñón , Panax notoginseng , Fosfatidilinositol 3-Quinasas , Proteínas Proto-Oncogénicas c-akt , Insuficiencia Renal Crónica , Transducción de Señal , Animales , Ratones , Insuficiencia Renal Crónica/tratamiento farmacológico , Insuficiencia Renal Crónica/metabolismo , Transducción de Señal/efectos de los fármacos , Proteínas Proto-Oncogénicas c-akt/metabolismo , Fosfatidilinositol 3-Quinasas/metabolismo , Medicamentos Herbarios Chinos/farmacología , Medicamentos Herbarios Chinos/uso terapéutico , Masculino , Panax notoginseng/química , Flavonas/farmacología , Flavonas/uso terapéutico , Riñón/patología , Riñón/efectos de los fármacos , Planta del Astrágalo/química , Ratones Endogámicos C57BL , Espectrometría de Masas en Tándem , Cromatografía Líquida de Alta Presión
12.
Nano Lett ; 23(5): 1752-1757, 2023 Mar 08.
Artículo en Inglés | MEDLINE | ID: mdl-36825889

RESUMEN

The superconductor PdTe2 is known to host bulk Dirac bands and topological surface states. The coexistence of superconductivity and topological surface states makes PdTe2 a promising platform for exploring topological superconductivity and Majorana bound states. In this work, we report the spectroscopic characterization of ultrathin PdTe2 films with thickness down to three monolayers (ML). In the 3 ML PdTe2 film, we observed spin-polarized surface resonance states, which are isolated from the bulk bands due to the quantum size effects. In addition, the hybridization of surface states on opposite faces leads to a thickness-dependent gap in the topological surface Dirac bands. Our photoemission results show clearly that the size of the hybridization gap increases as the film thickness is reduced. The observation of isolated surface resonances and gapped topological surface states sheds light on the applications of PdTe2 quantum films in spintronics and topological quantum computation.

13.
Int J Mol Sci ; 25(9)2024 Apr 27.
Artículo en Inglés | MEDLINE | ID: mdl-38731988

RESUMEN

Heavy metal copper (Cu) will inevitably impact the marine macroalgae Gracilariopsis lemaneiformis (G. lemaneiformis), which is a culture of economic importance along China's coastline. In this study, the detoxification mechanism of Cu stress on G. lemaneiformis was revealed by assessing physiological indicators in conjunction with transcriptome and metabolome analyses at 1 d after Cu stress. Our findings revealed that 25 µM Cu stimulated ROS synthesis and led to the enzymatic oxidation of arachidonic acid residues. This process subsequently impeded G. lemaneiformis growth by suppressing photosynthesis, nitrogen metabolism, protein synthesis, etc. The entry of Cu ions into the algae was facilitated by ZIPs and IRT transporters, presenting as Cu2+. Furthermore, there was an up-regulation of Cu efflux transporters HMA5 and ABC family transporters to achieve compartmentation to mitigate the toxicity. The results revealed that G. lemaneiformis elevated the antioxidant enzyme superoxide dismutase and ascorbate-glutathione cycle to maintain ROS homeostasis. Additionally, metabolites such as flavonoids, 3-O-methylgallic acid, 3-hydroxy-4-keto-gama-carotene, and eicosapentaenoic acid were up-regulated compared with the control, indicating that they might play roles in response to Cu stress. In summary, this study offers a comprehensive insight into the detoxification mechanisms driving the responses of G. lemaneiformis to Cu exposure.


Asunto(s)
Cobre , Metaboloma , Transcriptoma , Cobre/toxicidad , Cobre/metabolismo , Metaboloma/efectos de los fármacos , Algas Marinas/metabolismo , Algas Marinas/genética , Rhodophyta/metabolismo , Rhodophyta/genética , Rhodophyta/efectos de los fármacos , Especies Reactivas de Oxígeno/metabolismo , Perfilación de la Expresión Génica , Estrés Fisiológico , Estrés Oxidativo/efectos de los fármacos , Metabolómica/métodos
14.
BMC Med ; 21(1): 141, 2023 04 12.
Artículo en Inglés | MEDLINE | ID: mdl-37046279

RESUMEN

BACKGROUND: Although both peer victimization and bullying perpetration negatively impact preadolescents' development, the underlying neurobiological mechanism of this adverse relationship remains unclear. Besides, the specific psycho-cognitive patterns of different bullying subtypes also need further exploration, warranting large-scale studies on both general bullying and specific bullying subtypes. METHODS: We adopted a retrospective methodology by utilizing the data from the Adolescent Brain and Cognitive DevelopmentSM Study (ABCD Study®) cohort collected between July 2018 and January 2021. Participants were preadolescents aged from 10 to 13 years. The main purpose of our study is to examine the associations of general and specific peer victimization/bullying perpetration with preadolescents' (1) suicidality and non-suicidal self-injury; (2) executive function and memory, including attention inhibition, processing speed, emotion working memory, and episodic memory; (3) brain structure abnormalities; and (4) brain network disturbances. Age, sex, race/ethnicity, body mass index (BMI), socioeconomic status (SES), and data acquisition site were included as covariates. RESULTS: A total of 5819 participants aged from 10 to 13 years were included in this study. Higher risks of suicide ideation, suicide attempt, and non-suicidal self-injury were found to be associated with both bullying perpetration/peer victimization and their subtypes (i.e., overt, relational, and reputational). Meanwhile, poor episodic memory was shown to be associated with general victimization. As for perpetration, across all four tasks, significant positive associations of relational perpetration with executive function and episodic memory consistently manifested, yet opposite patterns were shown in overt perpetration. Notably, distinct psycho-cognitive patterns were shown among different subtypes. Additionally, victimization was associated with structural brain abnormalities in the bilateral paracentral and posterior cingulate cortex. Furthermore, victimization was associated with brain network disturbances between default mode network and dorsal attention network, between default mode network and fronto-parietal network, and ventral attention network related connectivities, including default mode network, dorsal attention network, cingulo-opercular network, cingulo-parietal network, and sensorimotor hand network. Perpetration was also associated with brain network disturbances between the attention network and the sensorimotor hand network. CONCLUSIONS: Our findings offered new evidence for the literature landscape by emphasizing the associations of bullying experiences with preadolescents' clinical characteristics and cognitive functions, while distinctive psycho-cognitive patterns were shown among different subtypes. Additionally, there is evidence that these associations are related to neurocognitive brain networks involved in attention control and episodic retrieval. Given our findings, future interventions targeting ameliorating the deleterious effect of bullying experiences on preadolescents should consider their subtypes and utilize an ecosystemic approach involving all responsible parties.


Asunto(s)
Acoso Escolar , Víctimas de Crimen , Suicidio , Adolescente , Humanos , Niño , Estudios Retrospectivos , Acoso Escolar/psicología , Víctimas de Crimen/psicología , Encéfalo
15.
J Transl Med ; 21(1): 334, 2023 05 20.
Artículo en Inglés | MEDLINE | ID: mdl-37210575

RESUMEN

BACKGROUND: Ovarian cancer (OC) has high mortality and poor prognosis for lacking of specific biomarkers and typical clinical symptoms in the early stage. CEBPG is an important regulator in tumor development, yet it is unclear exactly how it contributes to the progression of OC. METHODS: TCGA and tissue microarrays with immunohistochemical staining (IHC) were used to examine CEBPG expression in OC. A variety of in vitro assays were conducted, including colony formation, proliferation, migration, and invasion. The orthotopic OC mouse model was established for in vivo studies. Ferroptosis was detected by observing mitochondrial changes with electron microscopy, detecting ROS expression, and detecting cell sensitivity to drugs by CCK8 assay. The interaction between CEBPG and SLC7A11 was confirmed by CUT&Tag and dual luciferase reporter assays. RESULTS: A significantly higher expression level of CEBPG in OC when compared with benign tissues of ovary, and that high CEBPG expression level was also tightly associated with poor prognosis of patients diagnosed with OC, as determined by analysis of datasets and patient samples. Conversely, knockdown of CEBPG inhibited OC progression using experiments of OC cell lines and in vivo orthotopic OC-bearing mouse model. Importantly, CEBPG was identified as a new participator mediating ferroptosis evasion in OC cells using RNA-sequencing, which could contribute to OC progression. The CUT&Tag and dua luciferase reporter assays further revealed the inner mechanism that CEBPG regulated OC cell ferroptosis through transcriptional control of SLC7A11. CONCLUSIONS: Our findings established CEBPG as a novel transcriptional regulator of OC ferroptosis, with potential value in predicting clinical outcomes and as a therapeutic candidate.


Asunto(s)
Sistema de Transporte de Aminoácidos y+ , Proteínas Potenciadoras de Unión a CCAAT , Ferroptosis , Neoplasias Ováricas , Animales , Femenino , Humanos , Ratones , Sistema de Transporte de Aminoácidos y+/genética , Bioensayo , Línea Celular Tumoral , Ferroptosis/genética , Regulación de la Expresión Génica , Neoplasias Ováricas/genética , Proteínas Potenciadoras de Unión a CCAAT/genética
16.
Horm Metab Res ; 55(9): 642-648, 2023 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-37187181

RESUMEN

Type 2 diabetes mellitus (T2DM) is characterized by hyperglycemia, which seriously endangers human health. The dysregulation of lncRNA LINC01018 in T2DM has been noticed in previous studies, but whether it served as a biomarker lacks validation. This study aimed to confirm the abnormal expression of LINC01018 in T2DM and reveals its specific function in regulating pancreatic ß cell function. This study enrolled 77 T2DM patients and 41 healthy individuals and compared the plasma LINC01018 levels between two groups using PCR. The pancreatic ß cell was induced with 25 mM glucose to mimic cell injury during T2DM. The effects of LINC01018 on ß cell proliferation, dedifferentiation, and insulin production were evaluated by CCK8, western blotting, and ELISA. Moreover, the involvement of miR-499a-5p was also evaluated with luciferase reporter assay. Increased plasma LINC01018 was observed in T2DM patients compared with healthy individuals, which discriminates patients with high sensitivity and specificity. Upregulated LINC01018 was associated with patients' fasting blood glucose and weight loss. High glucose induced the increasing LINC01018 in pancreatic islet ß cells and suppressed cell proliferation, insulin secretion, and promoted cell dedifferentiation. Silencing LINC01018 could alleviate the impaired function of ß cells by high glucose, which was reversed by the knockdown by miR-499a-5p. Upregulated LINC01018 served as a potential diagnostic biomarker for T2DM and alleviated high glucose-induced ß cell dysfunction via negatively modulating miR-499a-5p.


Asunto(s)
Diabetes Mellitus Tipo 2 , Células Secretoras de Insulina , MicroARNs , ARN Largo no Codificante , Humanos , MicroARNs/genética , MicroARNs/metabolismo , ARN Largo no Codificante/genética , ARN Largo no Codificante/metabolismo , Diabetes Mellitus Tipo 2/genética , Diabetes Mellitus Tipo 2/metabolismo , Células Secretoras de Insulina/metabolismo , Glucosa/farmacología , Glucosa/metabolismo
17.
J Org Chem ; 88(14): 10212-10222, 2023 Jul 21.
Artículo en Inglés | MEDLINE | ID: mdl-37432194

RESUMEN

Hepta-2,3,5-trienedioates 1 have been employed as substrates to explore Lewis base-catalyzed annulation reactions. This leads to the discovery of a phosphine-catalyzed [3+2] annulation of 1 with electron-deficient alkenes for the construction of exocyclic olefinic cyclopentenes in good yields and moderate E:Z ratios under mild conditions. The annulation is believed to proceed in a tandem [3+2] cyclization and double bond migration in which the ε-ester is crucial to both processes. This reaction also showcases a substrate-controlled divergent reactivity compared to that of a previous report.

18.
BMC Infect Dis ; 23(1): 22, 2023 Jan 12.
Artículo en Inglés | MEDLINE | ID: mdl-36635681

RESUMEN

BACKGROUND: At present, the pathogenesis of post-treatment Lyme disease (PTLDS) is not clear, so the treatment scheme of PTLDS, especially antibiotic treatment, is still controversial. This study aims to evaluate the efficacy of antibiotics in the treatment of PTLDS using network meta-analysis (NMA). METHODS: Following PRISMA guidelines, a systematic literature search was conducted on randomized controlled trials in PubMed, EMBASE, Web of Science and Cochrane Library (the literature was published from database inception through December 16, 2022). Using random effect model and fixed effect model. STATA17.0 software was used to evaluate the quality and heterogeneity of the included research literature. RESULTS: The system included 4 randomized controlled trials (485 subjects). The network meta-analysis showed that ceftriaxone had better results than placebo [Mean = 0.87, 95% CI (0.02, 1.71)] and doxycycline [Mean = 1.01, 95% CI (0.03, 1.98)] in FSS scale scores. There was no statistical difference in FSS scale scores of other drugs after treatment. In terms of FSS score results, Ceftriaxone was the best intervention according to the SUCRA value of each treatment (97.7). The analysis of outcome indicators such as Beck Depression Inventory (BDI), Mental-health Scale and Physical-functioning scale showed that there was no statistically significant difference between the antibiotic group and placebo group. CONCLUSION: Ceftriaxone treatment may be the best choice for antibiotic treatment of PTLD, which provides useful guidance for antibiotic treatment of PTLD in the future.


Asunto(s)
Antibacterianos , Ceftriaxona , Enfermedad de Lyme , Humanos , Antibacterianos/efectos adversos , Ceftriaxona/uso terapéutico , Doxiciclina/uso terapéutico , Enfermedad de Lyme/complicaciones , Enfermedad de Lyme/tratamiento farmacológico , Metaanálisis en Red , Ensayos Clínicos Controlados Aleatorios como Asunto , Resultado del Tratamiento
19.
Cell Mol Biol (Noisy-le-grand) ; 69(9): 43-51, 2023 Sep 30.
Artículo en Inglés | MEDLINE | ID: mdl-37807335

RESUMEN

Lactobacillus acidophilus is widely used as a food additive or medication in our daily lives. The objective of this study was to investigate the effects of L. acidophilus and L. reuteri on bone mass in OVX mice and their associated mechanisms. Fifty 6-week-old female C57BL/6J mice were subjected to five different treatments: sham surgery, OVX surgery, OVXandL. reuteri fed, OVXandL. acidophilus fed, OVXandboth L. reuteri and L. acidophilus co-fed, respectively. Serum samples were collected, and IL-1ß,IL-6,TNF-α, and OCN levels were determined. The bone volume fraction and trabecular number, trabecular thickness, trabecular separation, and cortical thickness of the mice were analyzed by micro-CT in both femurs. Mice feces were taken for Illumina high-throughput sequencing to analyze the microbial composition and characteristics. After probiotic feeding, the bone volume fraction, the trabecular number, and the trabecular thickness increased, and the trabecular separation decreased in OVX mice. IL-1ß, IL-6, and TNF-α in the blood significantly decreased. The observed Chao1 and ACE indexes increased significantly. Changes in intestinal microorganisms occurred in all groups of mice. The change of index in the gut microbes, may indicate that the bone mass of OVX mice is changing. L. acidophilus shares the same role as L. reuteri in preventing bone loss in OVX mice. The mechanism of action may be through inhibition of the activation of inflammatory factors in the osteoclast activation pathway in bone metabolism, modulation of gut microbial diversity, and alteration of the richness of specific microorganisms that lead to attenuation of bone loss.


Asunto(s)
Microbioma Gastrointestinal , Limosilactobacillus reuteri , Probióticos , Ratones , Femenino , Animales , Humanos , Lactobacillus acidophilus , Factor de Necrosis Tumoral alfa , Interleucina-6 , Ratones Endogámicos C57BL , Probióticos/farmacología , Probióticos/uso terapéutico , Ovariectomía
20.
Exp Cell Res ; 410(1): 112929, 2022 01 01.
Artículo en Inglés | MEDLINE | ID: mdl-34793775

RESUMEN

Cervical cancer (CC) is among the most prevalent gynecological malignancies. Participation of long non-coding RNA (lncRNA) in modulating biological behaviors of CC cells has been confirmed. However, the function of lncRNA ABHD11 antisense RNA 1 (ABHD11-AS1) in CC is still unclear. RT-qPCR and Western blot were performed for measuring RNA and protein levels. Functional assays were done to evaluate ABHD11-AS1 influences on cell proliferation, apoptosis, invasion and migration. After the verification of ABHD11-AS1 distribution in CC cells, mechanism assays were conducted to study the interaction of relative RNAs. ABHD11-AS1 expression was abnormally high in CC cells. In vitro experiments showed ABHD11-AS1 downregulation restrained CC cell malignant phenotypes. In vivo experiments proved ABHD11-AS1 knockdown impeded tumor growth. Moreover, miR-330-5p was corroborated to bind with ABHD11-AS1 in CC cells and microtubule affinity regulating kinase 2 (MARK2) was confirmed to be targeted by miR-330-5p. MiR-330-5p inhibition or MARK2 overexpression could countervail the suppressive effect of ABHD11-AS1 knockdown on CC cell malignant behaviors. We found that ABHD11-AS1 facilitated CC tumorigenesis through competitively sequestering miR-330-5p to upregulate MARK2, indicating ABHD11-AS1 as a potential biomarker in CC.


Asunto(s)
MicroARNs/genética , Proteínas Serina-Treonina Quinasas/genética , ARN Largo no Codificante/genética , Neoplasias del Cuello Uterino/genética , Animales , Apoptosis/genética , Carcinogénesis/genética , Proliferación Celular/genética , Femenino , Regulación Neoplásica de la Expresión Génica/genética , Células HeLa , Xenoinjertos , Humanos , Ratones , Serina Proteasas/genética , Activación Transcripcional/genética , Neoplasias del Cuello Uterino/patología
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