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1.
Int J Mol Sci ; 22(19)2021 Sep 24.
Artigo em Inglês | MEDLINE | ID: mdl-34638650

RESUMO

Reactive oxygen species (ROS)-induced vascular endothelial cell apoptosis is strongly associated with atherosclerosis progression. Herein, we aimed to examine whether Kansuinine A (KA), extracted from Euphorbia kansui L., prevents atherosclerosis development in a mouse model and inhibits cell apoptosis through oxidative stress reduction. Atherosclerosis development was analyzed in apolipoprotein E-deficient (ApoE-/-) mice fed a high-fat diet (HFD) using Oil Red O staining and H&E staining. Human aortic endothelial cells (HAECs) were treated with KA, followed by hydrogen peroxide (H2O2), to investigate the KA-mediated inhibition of ROS-induced oxidative stress and cell apoptosis. Oil Red O staining and H&E staining showed that atherosclerotic lesion size was significantly smaller in the aortic arch of ApoE-/- mice in the HFD+KA group than that in the aortic arch of those in the HFD group. Further, KA (0.1-1.0 µM) blocked the H2O2-induced death of HAECs and ROS generation. The H2O2-mediated upregulation of phosphorylated IKKß, phosphorylated IκBα, and phosphorylated NF-κB was suppressed by KA. KA also reduced the Bax/Bcl-2 ratio and cleaved caspase-3 expression, preventing H2O2-induced vascular endothelial cell apoptosis. Our results indicate that KA may protect against ROS-induced endothelial cell apoptosis and has considerable clinical potential in the prevention of atherosclerosis and cardiovascular diseases.


Assuntos
Aorta/efeitos dos fármacos , Apoptose/efeitos dos fármacos , Aterosclerose/tratamento farmacológico , Diterpenos/farmacologia , Células Endoteliais/efeitos dos fármacos , Espécies Reativas de Oxigênio/metabolismo , Transdução de Sinais/efeitos dos fármacos , Animais , Aorta/metabolismo , Apolipoproteínas E/metabolismo , Aterosclerose/metabolismo , Células Cultivadas , Células Endoteliais/metabolismo , Humanos , Peróxido de Hidrogênio/metabolismo , Quinase I-kappa B/metabolismo , Camundongos , Inibidor de NF-kappaB alfa/metabolismo , NF-kappa B/metabolismo , Estresse Oxidativo/efeitos dos fármacos
2.
Biomed Res Int ; 2021: 3376496, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34337004

RESUMO

Lactobacillus rhamnoides, a human intestinal colonizer, can act through various pathways to induce microglia/macrophages to produce cytokines and to polarize microglia/macrophages to different phenotypes to reduce the inflammatory response. In this article, we evaluated the treatment potential of the Lactobacillus rhamnoides GG conditioned medium (LGG-CM) in rat model with SCI (acute spinal cord injury), including functional, neurophysiological, and histological outcomes and the underlying neuroprotective mechanisms. In our experiment, LGG-CM (30 mg/kg) was injected directly into the injury site in rats immediately after SCI. Measured by the BBB scale (Basso, Beattie, and Bresnahan locomotor rating scale) and inclined plane test, rats in the LGG-CM-treated group showed better locomotor scores. Moreover, compared to the vehicle treatment group, LGG-CM increased the mRNA level of the M2 marker (CD206), and decreased that of the M1 marker (iNOS). Western blot assays showed that LGG-CM-treated SCI rats had a higher grayscale ratio of p65 and a lower ratio of p-IκBα/IκBα. Our study shows that local injection of LGG-CM after acute SCI can inhibit inflammatory responses and improve motor function recovery. These effects may be related with the inhibition to the NF-κB (The nuclear factor-kappa B) signal pathway which leads to M2 microglia/macrophage polarization.


Assuntos
Polaridade Celular , Meios de Cultivo Condicionados/farmacologia , Lactobacillus rhamnosus/química , Macrófagos/patologia , Microglia/patologia , Recuperação de Função Fisiológica , Traumatismos da Medula Espinal/fisiopatologia , Animais , Polaridade Celular/efeitos dos fármacos , Sobrevivência Celular/efeitos dos fármacos , Feminino , Inflamação/patologia , Macrófagos/efeitos dos fármacos , Microglia/efeitos dos fármacos , Atividade Motora/efeitos dos fármacos , Inibidor de NF-kappaB alfa/metabolismo , NF-kappa B/metabolismo , Fosforilação/efeitos dos fármacos , Ratos , Recuperação de Função Fisiológica/efeitos dos fármacos , Transdução de Sinais/efeitos dos fármacos
3.
J Obstet Gynaecol Res ; 47(11): 3931-3942, 2021 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-34342105

RESUMO

AIM: NFKBIA is frequently encountered. However, its expression and relevance of the proliferation, invasion, and migration in human cervical cancer (CC) remain unclear. The role and novel mechanism of NFKBIA in CC progression were investigated in this study. METHODS: We analyzed the expression of NFKBIA in CC and adjacent normal tissues and explored the proliferation, migration, and invasion of HeLa cells by treating with either wild-type NFKBIA plasmid or NFKBIA siRNA. Effect of NFKBIA on the epithelial-mesenchymal transition (EMT) and the ß-catenin-mediated transcription of target genes were evaluated subsequently. RESULTS: NFKBIA expression was lower in CC tissues than that of adjacent tissues. An obvious dysregulation of NFKBIA overexpression was revealed in CC cell proliferation, invasion, and migration, which differed from the effect of knockdown NFKBIA. NFKBIA overexpression facilitated the expression of both phosphorylated ß-catenin and E-cadherin protein. It inhibited the expression of vimentin, TWIST, as well as downstream targets of ß-catenin including c-MYC, TCF-4 and MMP14. Conversely, NFKBIA silencing elevated the expression of c-MYC, TCF-4, and MMP14, and promoted the EMT in HeLa cells. Both endogenous and exogenous NFKBIA interacted with ß-catenin. Moreover, ß-catenin overexpression stemmed effects of NFKBIA on the proliferation, migration, and invasion of HeLa cells. By overexpressing NFKBIA in vivo, the volume and size of tumors were notably decreased, while no obvious alteration was found in mice body weight. CONCLUSION: By inhibiting ß-catenin-mediated transcription, NFKBIA functioning as a tumor suppressor might be introduced as a novel anti-metastatic agent for the treatment of targeted CC.


Assuntos
Neoplasias do Colo do Útero , Animais , Linhagem Celular Tumoral , Movimento Celular , Proliferação de Células , Transição Epitelial-Mesenquimal , Feminino , Regulação Neoplásica da Expressão Gênica , Células HeLa , Humanos , Camundongos , Inibidor de NF-kappaB alfa/genética , Neoplasias do Colo do Útero/genética , beta Catenina/genética , beta Catenina/metabolismo
4.
Mol Med Rep ; 23(5)2021 May.
Artigo em Inglês | MEDLINE | ID: mdl-34240224

RESUMO

Atopic dermatitis (AD) is a chronic inflammatory skin disease that seriously affects quality of life. Quinine is a bitter taste receptor agonist that exhibits antimalarial effects. The aim of the present study was to examine the therapeutic effects of quinine in AD­like mice. AD was induced with 2,4­dinitrochlorobenzene, and the mice were treated with 10 mg/kg quinine for 1, 4 and 7 days. A total of 60 BALB/c mice were divided into the following groups: Healthy, AD­like, AD­like + quinine and healthy + quinine, with 1, 4 and 7 days groups for each treatment. Blood was extracted from all mice and ELISA was performed to detect immunoglobulin E (IgE) levels. H&E­stained tissue sections were prepared from skin lesions on the backs of the mice and pathological changes were observed. Cytokines were detected via ELISA, and the filaggrin (FLG) and kallikrein­7 (KLK7) proteins were detected via western blotting and immunohistochemistry. IKKα and NF­κB mRNA were analyzed via reverse transcription­quantitative PCR. Quinine ameliorated skin damage in the AD­like mice, reduced IgE expression in the blood, inhibited expression of IKKα and NF­κB, reduced cytokine secretion, reduced KLK7 expression, reduced scratching frequency, increased FLG expression and repaired the skin barrier. These results suggested that quinine exhibited therapeutic effects in AD­like mice.


Assuntos
Dermatite Atópica/tratamento farmacológico , Quinina/farmacologia , Quinina/uso terapêutico , Animais , Citocinas/metabolismo , Dermatite Atópica/induzido quimicamente , Dermatite Atópica/metabolismo , Dermatite Atópica/patologia , Dinitroclorobenzeno/toxicidade , Modelos Animais de Doenças , Quinase I-kappa B/genética , Quinase I-kappa B/metabolismo , Imunoglobulina E/sangue , Calicreínas/genética , Calicreínas/metabolismo , Masculino , Camundongos Endogâmicos BALB C , Inibidor de NF-kappaB alfa/genética , Inibidor de NF-kappaB alfa/metabolismo , NF-kappa B/genética , NF-kappa B/metabolismo , Receptor Tipo 1 de Fator de Crescimento de Fibroblastos/genética , Receptor Tipo 1 de Fator de Crescimento de Fibroblastos/metabolismo , Transdução de Sinais/efeitos dos fármacos , Pele/efeitos dos fármacos , Pele/patologia
5.
Nat Commun ; 12(1): 4300, 2021 07 14.
Artigo em Inglês | MEDLINE | ID: mdl-34262035

RESUMO

Common fragile sites (CFSs) are specific breakage-prone genomic regions and are present frequently in cancer cells. The (E2-independent) E3 ubiquitin-conjugating enzyme FATS (fragile site-associated tumor suppressor) has antitumor activity in cancer cells, but the function of FATS in immune cells is unknown. Here, we report a function of FATS in tumor development via regulation of tumor immunity. Fats-/- mice show reduced subcutaneous B16 melanoma and H7 pancreatic tumor growth compared with WT controls. The reduced tumor growth in Fats-/- mice is macrophage dependent and is associated with a phenotypic shift of macrophages within the tumor from tumor-promoting M2-like to antitumor M1-like macrophages. In addition, FATS deficiency promotes M1 polarization by stimulating and prolonging NF-κB activation by disrupting NF-κB/IκBα negative feedback loops and indirectly enhances both CD4+ T helper type 1 (Th1) and cytotoxic T lymphocyte (CTL) adaptive immune responses to promote tumor regression. Notably, transfer of Fats-/- macrophages protects mice against B16 melanoma. Together, these data suggest that FATS functions as an immune regulator and is a potential target in cancer immunotherapy.


Assuntos
Proteínas de Ciclo Celular/imunologia , Macrófagos/imunologia , Neoplasias/imunologia , Proteínas Supressoras de Tumor/imunologia , Enzimas de Conjugação de Ubiquitina/imunologia , Animais , Proteínas de Ciclo Celular/genética , Linhagem Celular Tumoral , Humanos , Imunoterapia , Ativação de Macrófagos , Camundongos , Inibidor de NF-kappaB alfa/metabolismo , NF-kappa B/metabolismo , Neoplasias/patologia , Neoplasias/terapia , Transdução de Sinais/imunologia , Linfócitos T Citotóxicos/imunologia , Células Th1/imunologia , Proteínas Supressoras de Tumor/genética , Enzimas de Conjugação de Ubiquitina/genética
6.
Int J Mol Sci ; 22(11)2021 Jun 05.
Artigo em Inglês | MEDLINE | ID: mdl-34198827

RESUMO

The objective of this study was to investigate molecular mechanisms underlying the ability of carnosic acid to attenuate an early increase in reactive oxygen species (ROS) levels during MDI-induced adipocyte differentiation. The levels of superoxide anion and ROS were determined using dihydroethidium (DHE) and 2'-7'-dichlorofluorescin diacetate (DCFH-DA), respectively. Both superoxide anion and ROS levels peaked on the second day of differentiation. They were suppressed by carnosic acid. Carnosic acid attenuates the translation of NADPH (nicotinamide adenine dinucleotide phosphate) oxidase 4 (Nox4), p47phox, and p22phox, and the phosphorylation of nuclear factor-kappa B (NF-κB) and NF-κB inhibitor (IkBa). The translocation of NF-κB into the nucleus was also decreased by carnosic acid. In addition, carnosic acid increased the translation of heme oxygenase-1 (HO-1), γ-glutamylcysteine synthetase (γ-GCSc), and glutathione S-transferase (GST) and both the translation and nuclear translocation of nuclear factor erythroid 2-related factor 2 (Nrf2). Taken together, these results indicate that carnosic acid could down-regulate ROS level in an early stage of MPI-induced adipocyte differentiation by attenuating ROS generation through suppression of NF-κB-mediated translation of Nox4 enzyme and increasing ROS neutralization through induction of Nrf2-mediated translation of phase II antioxidant enzymes such as HO-1, γ-GCS, and GST, leading to its anti-adipogenetic effect.


Assuntos
ATPases Associadas a Diversas Atividades Celulares/genética , Abietanos/farmacologia , DNA Helicases/genética , Heme Oxigenase-1/genética , Proteínas de Membrana/genética , NADPH Oxidase 4/genética , Inibidor de NF-kappaB alfa/genética , Células 3T3-L1 , Adipócitos/efeitos dos fármacos , Adipócitos/metabolismo , Animais , Antioxidantes/farmacologia , Diferenciação Celular/efeitos dos fármacos , Grupo dos Citocromos b/genética , Etídio/análogos & derivados , Etídio/farmacologia , Fluoresceínas/farmacologia , Glutationa Transferase/genética , Camundongos , NADPH Oxidases/genética , Biossíntese de Proteínas/efeitos dos fármacos , Espécies Reativas de Oxigênio/metabolismo
7.
BMC Cancer ; 21(1): 841, 2021 Jul 20.
Artigo em Inglês | MEDLINE | ID: mdl-34284744

RESUMO

BACKGROUND: The tripartite motif (TRIM) family proteins exhibit oncogenic roles in various cancers. The roles of TRIM27, a member of the TRIM super family, in renal cell carcinoma (RCC) remained unexplored. In the current study, we aimed to investigate the clinical impact and roles of TRIM27 in the development of RCC. METHODS: The mRNA levels of TRIM27 and Kaplan-Meier survival of RCC were analyzed from The Cancer Genome Atlas database. Real-time PCR and Western blotting were used to measure the mRNA and protein levels of TRIM27 both in vivo and in vitro. siRNA and TRIM27 were exogenously overexpressed in RCC cell lines to manipulate TRIM27 expression. RESULTS: We discovered that TRIM27 was elevated in RCC patients, and the expression of TRIM27 was closely correlated with poor prognosis. The loss of function and gain of function results illustrated that TRIM27 promotes cell proliferation and inhibits apoptosis in RCC cell lines. Furthermore, TRIM27 expression was positively associated with NF-κB expression in patients with RCC. Blocking the activity of NF-κB attenuated the TRIM27-mediated enhancement of proliferation and inhibition of apoptosis. TRIM27 directly interacted with Iκbα, an inhibitor of NF-κB, to promote its ubiquitination, and the inhibitory effects of TRIM27 on Iκbα led to NF-κB activation. CONCLUSIONS: Our results suggest that TRIM27 exhibits an oncogenic role in RCC by regulating NF-κB signaling. TRIM27 serves as a specific prognostic indicator for RCC, and strategies targeting the suppression of TRIM27 function may shed light on future therapeutic approaches.


Assuntos
Carcinoma de Células Renais/genética , Proteínas de Ligação a DNA/metabolismo , Neoplasias Renais/genética , Inibidor de NF-kappaB alfa/genética , NF-kappa B/genética , Proteínas Nucleares/metabolismo , Animais , Apoptose/fisiologia , Carcinoma de Células Renais/patologia , Proliferação de Células/fisiologia , Humanos , Neoplasias Renais/patologia , Camundongos , Camundongos Nus , Pessoa de Meia-Idade , Inibidor de NF-kappaB alfa/metabolismo
8.
EMBO Rep ; 22(8): e52649, 2021 08 04.
Artigo em Inglês | MEDLINE | ID: mdl-34224210

RESUMO

IκBs exert principal functions as cytoplasmic inhibitors of NF-kB transcription factors. Additional roles for IκB homologues have been described, including chromatin association and transcriptional regulation. Phosphorylated and SUMOylated IκBα (pS-IκBα) binds to histones H2A and H4 in the stem cell and progenitor cell compartment of skin and intestine, but the mechanisms controlling its recruitment to chromatin are largely unknown. Here, we show that serine 32-36 phosphorylation of IκBα favors its binding to nucleosomes and demonstrate that p-IκBα association with H4 depends on the acetylation of specific H4 lysine residues. The N-terminal tail of H4 is removed during intestinal cell differentiation by proteolytic cleavage by trypsin or chymotrypsin at residues 17-19, which reduces p-IκBα binding. Inhibition of trypsin and chymotrypsin activity in HT29 cells increases p-IκBα chromatin binding but, paradoxically, impaired goblet cell differentiation, comparable to IκBα deletion. Taken together, our results indicate that dynamic binding of IκBα to chromatin is a requirement for intestinal cell differentiation and provide a molecular basis for the understanding of the restricted nuclear distribution of p-IκBα in specific stem cell compartments.


Assuntos
Cromatina , Histonas , Acetilação , Cromatina/genética , Histonas/metabolismo , Humanos , Inibidor de NF-kappaB alfa/genética , Nucleossomos/genética
9.
Science ; 372(6548): 1349-1353, 2021 06 18.
Artigo em Inglês | MEDLINE | ID: mdl-34140389

RESUMO

The epigenome of macrophages can be reprogrammed by extracellular cues, but the extent to which different stimuli achieve this is unclear. Nuclear factor κB (NF-κB) is a transcription factor that is activated by all pathogen-associated stimuli and can reprogram the epigenome by activating latent enhancers. However, we show that NF-κB does so only in response to a subset of stimuli. This stimulus specificity depends on the temporal dynamics of NF-κB activity, in particular whether it is oscillatory or non-oscillatory. Non-oscillatory NF-κB opens chromatin by sustained disruption of nucleosomal histone-DNA interactions, enabling activation of latent enhancers that modulate expression of immune response genes. Thus, temporal dynamics can determine a transcription factor's capacity to reprogram the epigenome in a stimulus-specific manner.


Assuntos
Epigenoma , Macrófagos/metabolismo , NF-kappa B/metabolismo , Fator de Transcrição RelA/metabolismo , Animais , Núcleo Celular/metabolismo , Cromatina/metabolismo , DNA/metabolismo , Elementos Facilitadores Genéticos , Regulação da Expressão Gênica , Histonas/metabolismo , Sistema de Sinalização das MAP Quinases , Macrófagos/imunologia , Metilação , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Knockout , Modelos Biológicos , Inibidor de NF-kappaB alfa/genética , Inibidor de NF-kappaB alfa/metabolismo , Nucleossomos/metabolismo , Transdução de Sinais , Transcrição Genética
10.
Commun Biol ; 4(1): 753, 2021 06 17.
Artigo em Inglês | MEDLINE | ID: mdl-34140629

RESUMO

Metastatic cancer cells are frequently deficient in WWOX protein or express dysfunctional WWOX (designated WWOXd). Here, we determined that functional WWOX-expressing (WWOXf) cells migrate collectively and expel the individually migrating WWOXd cells. For return, WWOXd cells induces apoptosis of WWOXf cells from a remote distance. Survival of WWOXd from the cell-to-cell encounter is due to activation of the survival IκBα/ERK/WWOX signaling. Mechanistically, cell surface epitope WWOX286-299 (repl) in WWOXf repels the invading WWOXd to undergo retrograde migration. However, when epitope WWOX7-21 (gre) is exposed, WWOXf greets WWOXd to migrate forward for merge. WWOX binds membrane type II TGFß receptor (TßRII), and TßRII IgG-pretreated WWOXf greet WWOXd to migrate forward and merge with each other. In contrast, TßRII IgG-pretreated WWOXd loses recognition by WWOXf, and WWOXf mediates apoptosis of WWOXd. The observatons suggest that normal cells can be activated to attack metastatic cancer cells. WWOXd cells are less efficient in generating Ca2+ influx and undergo non-apoptotic explosion in response to UV irradiation in room temperature. WWOXf cells exhibit bubbling cell death and Ca2+ influx effectively caused by UV or apoptotic stress. Together, membrane WWOX/TßRII complex is needed for cell-to-cell recognition, maintaining the efficacy of Ca2+ influx, and control of cell invasiveness.


Assuntos
Invasividade Neoplásica/fisiopatologia , Metástase Neoplásica/patologia , Neoplasias/patologia , Receptor do Fator de Crescimento Transformador beta Tipo II/metabolismo , Oxidorredutase com Domínios WW/metabolismo , Animais , Apoptose/imunologia , Células COS , Cálcio/metabolismo , Linhagem Celular Tumoral , Movimento Celular/fisiologia , Chlorocebus aethiops , Células HCT116 , Humanos , Células L , Células MCF-7 , Camundongos , Inibidor de NF-kappaB alfa/metabolismo , Neoplasias/genética , Transdução de Sinais/fisiologia , Oxidorredutase com Domínios WW/genética
11.
Zhonghua Jie He He Hu Xi Za Zhi ; 44(6): 537-542, 2021 Jun 12.
Artigo em Chinês | MEDLINE | ID: mdl-34102715

RESUMO

Objective: To investigate the effect of VDR gene silencing on proliferation of airway smooth muscle cells (ASMCs) and elucidate the role of NF-κB. Methods: A recombinant lentiviral vector specifically targeting VDR gene in rat was constructed by RNA interference. Rat ASMCs were divided into blank group, empty vector group and interference group. ASM cell line model stably silencing the VDR gene RNA expressing was selected by puromycin. Then MTT colorimetric assay and cell cycle analysis by flow cytometry were used to examine cell proliferation. The activation of nuclear factor-κB was determined by immunofluorescence double label method. Moreover, NF-κB-dependent transcription activity was tested through luciferase reporter gene assay. Western blotting was used for IκBα and phospho-IκBα protein levels and actinomycin D treatment was used to determine IκBα mRNA stability. All statistical analyses were performed using SPSS version 23.0 software. Differences between groups were analyzed using one-way ANOVA analysis. Multiple comparisons among groups were made by Student-Newman-Keuls test. Results: (1) As compared with those in the blank group and the empty vector group, the cell proliferation index (PI) and the percent of ASMCs at G2/M phase in the interference group were markedly increased (P<0.05), but their percent at G0/1 phase was decreased (P<0.05).(2) In the interference group, the nuclear translocation of NF-κB p65 in ASMCs was obviously induced. And its level of receptor gene NF-κB p65 (1.37±0.28) was significantly higher than that in the blank group (1.00±0.19,P=0.031) and in the empty vector group (0.96±0.18,P=0.027).(3) In the interference group, the IκBα protein level in ASMCs (0.13±0.04) was obviously less than that in the blank group (0.29±0.05, P=0.023) and in the empty vector group (0.32±0.07, P=0.014). Oppositely, the p-IκBα/IκBα level in the interference group (0.86±0.04) was much more than that in the blank control group (0.41±0.07, P=0.026) and in the empty vector group (0.37±0.05, P=0.017). (4) In the interference group, IκBα mRNA showed a shorter half-life, (171.31±9.67) min, compared to that in the blank group [(224.69±7.95) min,P=0.032] and in the empty vector group [(230.41±6.37) min,P=0.035]. Conclusion: VDR gene silencing could promote ASMC proliferation and the underlying mechanism may involve the activation of NF-κB signaling pathway.


Assuntos
NF-kappa B , Transdução de Sinais , Animais , Proliferação de Células , Miócitos de Músculo Liso/metabolismo , Inibidor de NF-kappaB alfa/genética , NF-kappa B/genética , NF-kappa B/metabolismo , Interferência de RNA , Ratos , Receptores de Calcitriol
12.
Front Immunol ; 12: 684424, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34113355

RESUMO

Whether hepatitis B virus (HBV) activates or represses innate immunity continues to be debated. Toll-like receptor (TLR) 2 has been identified to recognize HBV particles in human hepatocytes. The Hippo pathway, known for growth control, is suggested to play a vital role in immune regulation. Here, molecular interactions between HBV-triggered TLR signaling and the Hippo pathway were comprehensively investigated. Reanalysis of GSE69590 data, in which human hepatocytes have been treated with cell culture-derived HBV particles, identified changes in Hippo and NF-κB signaling. Immunocytochemical staining and western blotting revealed time-dependent nuclear translocation of YAP and NF-κB in HBV-exposed primary human and murine hepatocytes (PMH). Analysis of PMH isolated from MyD88- or IRAK4-deficient mice and the inhibition of TLR2 and MST1/2 in vitro confirmed the relation between TLR2 and Hippo signaling in HBV-induced immunity. Loss and gain of function experiments implied that Hippo-downstream effector YAP directly regulated IκBα expression. Functional investigations confirmed the regulation of Nfkbia promoter activity by the YAP/TEAD4 transcription factor complex. Administration of TLR ligands to mice highlighted the relevance of the TLR2-MyD88-IRAK4-Hippo axis in hepatic immunity. Interestingly, reanalysis of gene expression pattern in liver biopsies of patients chronically infected with HBV (GSE83148, GSE65359) indicated an activation of TLR2 and however, an MST1-dominated Hippo control in the immune clearance phase of patients with chronic HBV infection. We demonstrated that MyD88-dependent TLR signaling activates NF-κB and Hippo signaling, with YAP prompting the IκBα-mediated negative feedback, alongside NF-κB. Imbalance between immune induction and Hippo activation may have implications for the safety of novel HBV cure strategies interfering with pathogen recognition receptors.


Assuntos
Vírus da Hepatite B/imunologia , Hepatite B/imunologia , Imunidade Inata , NF-kappa B/metabolismo , /metabolismo , Animais , Hepatite B/genética , Hepatite B/metabolismo , Vírus da Hepatite B/genética , Vírus da Hepatite B/metabolismo , Hepatócitos/imunologia , Hepatócitos/metabolismo , Humanos , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Knockout , Fator 88 de Diferenciação Mieloide/metabolismo , Inibidor de NF-kappaB alfa/metabolismo , Transdução de Sinais , Receptor 2 Toll-Like/metabolismo , Fatores de Transcrição
13.
Toxicol Appl Pharmacol ; 426: 115635, 2021 09 01.
Artigo em Inglês | MEDLINE | ID: mdl-34174262

RESUMO

The beneficial role of prasugrel, a P2Y12 receptor blocker, in several neurointerventional procedures has been reviewed clinically. Beyond its antiplatelet capacity, the potential neuroprotective mechanisms of prasugrel are poorly addressed experimentally. Relevant to the imbalance between neuro-inflammation and neuroprotective pathways in cerebral ischemia/reperfusion (I/R), our study evaluated the anti-ischemic potential of prasugrel treatment through tackling novel targets. Male Wistar rats were allocated into 2 sets; set 1 (I/R 60 min/3 days) to assess the neurological deficits/biochemical impact of prasugrel and set 2 (I/R 60 min/5 days) for evaluating short memory/morphological/immunoreactive changes. Each set comprised 4 groups designated as sham, sham + prasugrel, I/R, and I/R + prasugrel. Post-administration of prasugrel for 3 and 5 days reduced neurological deficit scores and improved the spontaneous activity/short term spatial memory using the Y-maze paradigm. On the molecular level, prasugrel turned off SUMO2/3-inhibitory kappa (Iκ)Bα, Ubc9 and nuclear factor kappa (NF-κ)B. Besides, it inhibited malondialdehyde (MDA) and inactivated astrocytes by downregulating the glial fibrillary acidic protein (GFAP) hippocampal immune-expression. Conversely, it activated its target molecule cAMP, protein kinase (PK)A, and cAMP response element-binding protein (CREB) to enhance the brain-derived nuclear factor (BDNF) hippocampal content. Additionally, cAMP/PKA axis increased the hippocampal content of deacetylator silent information regulator 1 (SIRT1) and the micro RNA (miR)-22 gene expression. The crosstalk between these paths partakes in preserving hippocampal cellularity. Accordingly, prasugrel, regardless inhibiting platelets activity, modulated other cellular components; viz., SUMO2/3-IκBα/Ubc9/NF-κB, cAMP/PKA related trajectories, CREB/BDNF and SIRT1/miR-22 signaling, besides inhibiting GFAP and MDA to signify its anti-ischemic potential.


Assuntos
Isquemia Encefálica/tratamento farmacológico , Hipocampo/efeitos dos fármacos , Fármacos Neuroprotetores/uso terapêutico , Inibidores da Agregação Plaquetária/uso terapêutico , Cloridrato de Prasugrel/uso terapêutico , Antagonistas do Receptor Purinérgico P2Y/uso terapêutico , Animais , Comportamento Animal/efeitos dos fármacos , Isquemia Encefálica/sangue , Isquemia Encefálica/metabolismo , Isquemia Encefálica/patologia , Hipocampo/metabolismo , Hipocampo/patologia , Peroxidação de Lipídeos/efeitos dos fármacos , Masculino , MicroRNAs/sangue , Inibidor de NF-kappaB alfa/metabolismo , Fármacos Neuroprotetores/farmacologia , Inibidores da Agregação Plaquetária/farmacologia , Cloridrato de Prasugrel/farmacologia , Antagonistas do Receptor Purinérgico P2Y/farmacologia , Ratos Wistar , Sirtuína 1/metabolismo , Proteínas Modificadoras Pequenas Relacionadas à Ubiquitina/metabolismo , Memória Espacial/efeitos dos fármacos , Enzimas de Conjugação de Ubiquitina/metabolismo
14.
Molecules ; 26(11)2021 May 27.
Artigo em Inglês | MEDLINE | ID: mdl-34072134

RESUMO

The interest in utilizing food-derived compounds therapeutically has been rising. With the growing prevalence of systematic chronic inflammation (SCI), efforts to find treatments that do not result in the side effects of current anti-inflammatory drugs are underway. Bioactive peptides (BAPs) are a particularly promising class of compounds for the treatment of SCI, and the abundance of high-quality seafood processing byproducts (SPB) makes it a favorable material to derive anti-inflammatory BAPs. Recent research into the structural properties of anti-inflammatory BAPs has found a few key tendencies including they tend to be short and of low molecular weight (LMW), have an overall positive charge, contain hydrophobic amino acids (AAs), and be rich in radical scavenging AAs. SPB-derived anti-inflammatory BAPs have been observed to work via inhibition of the NF-κB and MAPK pathways by disrupting the phosphorylation of IκBα and one or more kinases (ERK, JNK, and p38), respectively. Radical scavenging capacity has also been shown to play a significant role in the efficacy of SPB-derived anti-inflammatory BAPs. To determine if SPB-derived BAPs can serve as an effective treatment for SCI it will be important to understand their properties and mechanisms of action, and this review highlights such findings in recent research.


Assuntos
Anti-Inflamatórios/farmacologia , Peptídeos/química , Aminoácidos/química , Animais , Anti-Inflamatórios não Esteroides/farmacologia , Antioxidantes/farmacologia , Dano ao DNA , MAP Quinases Reguladas por Sinal Extracelular/metabolismo , Peixes , Interações Hidrofóbicas e Hidrofílicas , Inflamação , MAP Quinase Quinase 4/metabolismo , Macrófagos/metabolismo , Peso Molecular , Inibidor de NF-kappaB alfa/metabolismo , Estresse Oxidativo , Reprodutibilidade dos Testes , Frutos do Mar , Proteínas de Frutos do Mar , Proteínas Quinases p38 Ativadas por Mitógeno/metabolismo
15.
Int J Mol Sci ; 22(11)2021 May 24.
Artigo em Inglês | MEDLINE | ID: mdl-34073872

RESUMO

Acute lung injury (ALI) and acute respiratory distress syndrome (ARDS) are common and devastating clinical disorders with high mortality and no specific therapy. Lipopolysaccharide (LPS) is usually used intratracheally to induce ALI in mice. The aim of this study was to examine the effects of an ultramicronized preparation of palmitoylethanolamide (um-PEA) in mice subjected to LPS-induced ALI. Histopathological analysis reveals that um-PEA reduced alteration in lung after LPS intratracheal administration. Besides, um-PEA decreased wet/dry weight ratio and myeloperoxidase, a marker of neutrophils infiltration, macrophages and total immune cells number and mast cells degranulation in lung. Moreover, um-PEA could also decrease cytokines release of interleukin (IL)-6, interleukin (IL)-1ß, tumor necrosis factor (TNF)-α and interleukin (IL)-18. Furthermore, um-PEA significantly inhibited the phosphorylation of nuclear factor of kappa light polypeptide gene enhancer in B-cells inhibitor, alpha (IκBα) and nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) activation in ALI, and at the same time decreased extracellular signal-regulated kinase 1/2 (ERK1/2), c-Jun N-terminal kinase (JNK) and p38 mitogen-activated protein kinase (p38/MAPK) expression, that was increased after LPS administration. Our study suggested that um-PEA contrasted LPS-induced ALI, exerting its potential role as an adjuvant anti-inflammatory therapeutic for treating lung injury, maybe also by p38/NF-κB pathway.


Assuntos
Lesão Pulmonar Aguda/tratamento farmacológico , Amidas/farmacologia , Citocinas/metabolismo , Etanolaminas/farmacologia , Sistema de Sinalização das MAP Quinases/efeitos dos fármacos , Ácidos Palmíticos/farmacologia , Lesão Pulmonar Aguda/metabolismo , Lesão Pulmonar Aguda/patologia , Amidas/uso terapêutico , Animais , Etanolaminas/uso terapêutico , Imuno-Histoquímica , Inflamação/metabolismo , Interleucina-18/metabolismo , Interleucina-1beta/metabolismo , Interleucina-6/metabolismo , Proteínas Quinases JNK Ativadas por Mitógeno/metabolismo , Lipopolissacarídeos/administração & dosagem , Lipopolissacarídeos/toxicidade , Macrófagos/efeitos dos fármacos , Macrófagos/imunologia , Masculino , Mastócitos/efeitos dos fármacos , Mastócitos/patologia , Camundongos , Proteína Quinase 1 Ativada por Mitógeno/metabolismo , Proteína Quinase 3 Ativada por Mitógeno/metabolismo , Inibidor de NF-kappaB alfa/metabolismo , NF-kappa B/metabolismo , Neutrófilos/efeitos dos fármacos , Neutrófilos/imunologia , Ácidos Palmíticos/uso terapêutico , Peroxidase/metabolismo , Fator de Necrose Tumoral alfa/metabolismo , Proteínas Quinases p38 Ativadas por Mitógeno/metabolismo
16.
Life Sci ; 284: 119615, 2021 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-34004248

RESUMO

BACKGROUND: Atherosclerosis (AS) is a multifocal, smoldering immune inflammatory disease of medium and large arteries driven by lipids. The aim of this study is to discuss the mechanism of microRNA-146a-3p (miR-146a-3p)/histone deacetylase 1 (HDAC1)/Krüppel-like factor 5 (KLF5)/inhibitors of kappa B α (IKBα) signal axis in plaque formation of AS mice. METHODS: ApoE-/- mice were fed with high-fat feed for 12 weeks to establish AS mice model. The expression of miR-146a-3p, KLF5, HDAC1 and IKBα in aortic wall tissues of AS mice was tested. The targeting relationship between miR-146a-3p and HDAC1 was verified. AS mice were injected with miR-146a-3p antagomir or HDAC1 overexpression to verify the impacts of miR-146a-3p and HDAC1 on blood lipids and inflammatory factors in serum, aortic wall apoptotic cells, antioxidant stress capacity and the plaque area in AS mice. VECs proliferation and apoptosis were also measured in vitro. RESULTS: miR-146a-3p and KLF5 were increased while HDAC1 and IKBα were reduced in aortic wall tissues of AS mice. miR-146a-3p directly targeted to HDAC1. Depletion of miR-146a-3p or restoration of HDAC1 was correlated to lower plasma lipid level, reduced inflammatory factors in serum, attenuated aortic wall apoptosis, increased antioxidant stress capacity and improved the stability of pathological plaque of AS mice. miR-146a-3p down-regulation or HDAC1 up-regulation promoted VECs proliferation and inhibited apoptosis. CONCLUSION: Functional studies show that depleted miR-146a-3p advances HDAC1 and IKBα expression as well as inhibits KLF5 expression to facilitate the stability of pathological plaques in AS mice.


Assuntos
Aterosclerose/genética , Histona Desacetilase 1/metabolismo , Fatores de Transcrição Kruppel-Like/metabolismo , MicroRNAs/metabolismo , Inibidor de NF-kappaB alfa/metabolismo , Placa Aterosclerótica/genética , Transdução de Sinais , Animais , Antioxidantes/metabolismo , Apoptose/genética , Aterosclerose/sangue , Aterosclerose/patologia , Sequência de Bases , Proliferação de Células/genética , Regulação para Baixo/genética , Células Endoteliais/metabolismo , Células Endoteliais/patologia , Histona Desacetilase 1/genética , Inflamação/sangue , Inflamação/patologia , Fatores de Transcrição Kruppel-Like/genética , Lipídeos/sangue , Masculino , Camundongos Endogâmicos C57BL , MicroRNAs/genética , Placa Aterosclerótica/sangue , Transdução de Sinais/genética , Regulação para Cima/genética
17.
J Ethnopharmacol ; 276: 114186, 2021 Aug 10.
Artigo em Inglês | MEDLINE | ID: mdl-33957208

RESUMO

ETHNOPHARMACOLOGICAL RELEVANCE: Physalis angulata L. is commonly used in many countries as popular medicine for the treatment of a variety of diseases such as malaria, hepatitis, dermatitis and rheumatism. But the anti-inflammatory active constituents of this medicinal plant and their molecular mechanism are still not elucidated clearly. AIM OF THE STUDY: The aim of the study is to isolate and identify a series of compounds from the ethanolic extract of Physalis angulata L., and to investigate the anti-inflammatory activities in vitro and the molecular mechanism of physagulin A, physagulin C, and physagulin H. MATERIALS AND METHODS: In order to further understand the anti-inflammatory mechanism of the three compounds, their potential anti-inflammatory activities were investigated in vitro in LPS-activated RAW 264.7 macrophage cells by Griess assay, ELISA, Western blot and immunofluorescence methods in the present study. RESULTS: Physagulin A, physagulin C, and physagulin H could not only inhibit the release of NO, PGE2, IL-6 and TNF-α, but also could down-regulate the expression of iNOS and COX-2 proteins. Furthermore, physagulin A, physagulin C, and physagulin H could remarkably block the degradation of IκB-α and the nuclear translocation of NF-κB/p65 in LPS-activated RAW 264.7 cells. However, none of them could inhibit the phosphorylation of MAPKs family proteins ERK, JNK and p38. Thus, the anti-inflammatory actions of physagulin A, physagulin C, and physagulin H were mainly due to the significant inhibition of NF-κB signaling pathway rather than MAPKs signaling pathway. CONCLUSIONS: All the results clearly showed that physagulin A, physagulin C, and physagulin H demonstrated potent anti-inflammatory activity and can be used as novel NF-κB inhibitors. They are potential to be developed as an alternative or complementary agents for inflammatory diseases.


Assuntos
Anti-Inflamatórios/farmacologia , Inflamação/tratamento farmacológico , NF-kappa B/antagonistas & inibidores , Physalis/química , Extratos Vegetais/farmacologia , Transdução de Sinais/efeitos dos fármacos , Vitanolídeos/farmacologia , Animais , Anti-Inflamatórios/química , Anti-Inflamatórios/isolamento & purificação , Proliferação de Células/efeitos dos fármacos , Sobrevivência Celular/efeitos dos fármacos , Ciclo-Oxigenase 2/metabolismo , Dinoprostona/metabolismo , Inflamação/induzido quimicamente , Interleucina-6/metabolismo , Lipopolissacarídeos/farmacologia , Lipopolissacarídeos/toxicidade , Camundongos , Inibidor de NF-kappaB alfa/metabolismo , Óxido Nítrico/metabolismo , Óxido Nítrico Sintase Tipo II/metabolismo , Extratos Vegetais/isolamento & purificação , Células RAW 264.7 , Fator de Transcrição RelA/metabolismo , Fator de Necrose Tumoral alfa/metabolismo , Vitanolídeos/química , Vitanolídeos/isolamento & purificação
18.
J Ethnopharmacol ; 277: 114183, 2021 Sep 15.
Artigo em Inglês | MEDLINE | ID: mdl-33991638

RESUMO

ETHNOPHARMACOLOGICAL RELEVANCE: The dried rhizome of Atractylodes lancea (Thumb.) DC. (Compositae) has been prescribed in folk medicine for the management of various inflammatory conditions such as rheumatic diseases, gastritis and hepatitis. However, the molecular mechanisms underlying the beneficial properties of this herb remain elusive. AIM OF THE STUDY: In this study, we investigated the anti-gastritis activities of Al-EE (an ethanolic extract of the herb) and explored the mechanism of action. MATERIALS AND METHODS: An ethanolic extract of the Atractylodes lancea (Thumb.) DC. (Compositae) rhizome, Al-EE, was prepared with ethanol (95%) and quality controlled using HPLC analysis. To determine the in vivo effects of this extract, we utilised a HCl/EtOH-induced gastritis rat model. In vitro assays were carried out using a lipopolysaccharide (LPS)-stimulated RAW 264.7 macrophage cell model. MTT assays were used to examine cell viability, while Griess assays were carried out to measure nitric oxide (NO) production. Messenger RNA expression was examined by real-time PCR. Prostaglandin E2 (PGE2) production was examined using ELISA assays. To examine protein expression and enzymatic activities, we employed western blot analysis. Nuclear transcription factor (NF)-κB activity was determined by Luciferase reporter assays. RESULTS: The content of atractylenolide (AT)-1 and AT-2 in Al-EE was 0.45% and 5.07% (w/w), respectively (Supplementary Fig. 1). Al-EE treatment suppressed the production of NO and PGE2, reduced the mRNA expression of inducible NO synthase (iNOS), cyclooxygenase (COX)-2 and tumor necrosis factor (TNF)-α, while also reducing the protein levels of iNOS and COX-2 in RAW264.7 macrophage cells. Furthermore, Al-EE inhibited the nuclear protein levels of NF-κB (p65) and NF-κB-driven luciferase reporter gene activity in RAW264.7 macrophage cells. Critically, intra-gastric injection of Al-EE (25 mg/kg) attenuated HCl/EtOH-induced gastric damage in SD rats, while the phosphorylation of Akt and IκBα was suppressed by Al-EE in vitro and in vivo. CONCLUSION: In summary, Al-EE has significant anti-gastritis effects in vivo and in vitro, which can be associated with the inhibition of the Akt/IκBα/NF-κB signalling pathway. This mechanistic finding provides a pharmacological basis for the use of the A. lancea rhizome in the clinical treatment of various inflammatory conditions.


Assuntos
Anti-Inflamatórios/farmacologia , Atractylodes/química , Gastrite/tratamento farmacológico , Extratos Vegetais/farmacologia , Animais , Anti-Inflamatórios/isolamento & purificação , Etanol/química , Gastrite/patologia , Lipopolissacarídeos , Macrófagos/efeitos dos fármacos , Macrófagos/patologia , Masculino , Camundongos , Inibidor de NF-kappaB alfa/metabolismo , NF-kappa B/metabolismo , Óxido Nítrico/metabolismo , Proteínas Proto-Oncogênicas c-akt/metabolismo , Células RAW 264.7 , Ratos , Ratos Sprague-Dawley , Rizoma , Transdução de Sinais/efeitos dos fármacos
19.
BMC Neurol ; 21(1): 197, 2021 May 14.
Artigo em Inglês | MEDLINE | ID: mdl-33990177

RESUMO

BACKGROUND: This study was performed to identify genes and lncRNAs involved in the pathogenesis of subarachnoid hemorrhage (SAH) from ruptured intracranial aneurysm (RIA). METHODS: Microarray GSE36791 was downloaded from Gene Expression Omnibus (GEO) database followed by the identification of significantly different expressed RNAs (DERs, including lncRNA and mRNA) between patients with SAH and healthy individuals. Then, the functional analyses of DEmRNAs were conducted and weighted gene co-expression network analysis (WGCNA) was also performed to extract the modules associated with SAH. Following, the lncRNA-mRNA co-expression network was constructed and the gene set enrichment analysis (GSEA) was performed to screen key RNA biomarkers involved in the pathogenesis of SAH from RIA. We also verified the results in a bigger dataset GSE7337. RESULTS: Totally, 561 DERs, including 25 DElncRNAs and 536 DEmRNAs, were identified. Functional analysis revealed that the DEmRNAs were mainly associated with immune response-associated GO-BP terms and KEGG pathways. Moreover, there were 6 modules significantly positive-correlated with SAH. The lncRNA-mRNA co-expression network contained 2 lncRNAs (LINC00265 and LINC00937) and 169 mRNAs. The GSEA analysis showed that these two lncRNAs were associated with three pathways (cytokine-cytokine receptor interaction, neurotrophin signaling pathway, and apoptosis). Additionally, IRAK3 and NFKBIA involved in the neurotrophin signaling pathway and apoptosis while IL1R2, IL18RAP and IL18R1 was associated with cytokine-cytokine receptor interaction pathway. The expression levels of these genes have the same trend in GSE36791 and GSE7337. CONCLUSION: LINC00265 and LINC00937 may be implicated with the pathogenesis of SAH from RIA. They were involved in three important regulatory pathways. 5 mRNAs played important roles in the three pathways.


Assuntos
Quinases Associadas a Receptores de Interleucina-1/genética , Aneurisma Intracraniano/genética , Inibidor de NF-kappaB alfa/genética , Hemorragia Subaracnóidea/genética , Aneurisma Roto/genética , Estudos de Casos e Controles , Perfilação da Expressão Gênica , Redes Reguladoras de Genes , Humanos , RNA Longo não Codificante/genética , RNA Mensageiro/genética , Transdução de Sinais , Regulação para Cima
20.
BMC Cancer ; 21(1): 596, 2021 May 24.
Artigo em Inglês | MEDLINE | ID: mdl-34030642

RESUMO

BACKGROUND: Phosphorylation of NF-kappaB inhibitor alpha (IκBα) is key to regulation of NF-κB transcription factor activity in the cell. Several sites of IκBα phosphorylation by members of the IκB kinase family have been identified, but phosphorylation of the protein by other kinases remains poorly understood. We investigated a new phosphorylation site on IκBα and identified its biological function in breast cancer cells. METHODS: Previously, we observed that aurora kinase (AURK) binds IκBα in the cell. To identify the domains of IκBα essential for phosphorylation by AURK, we performed kinase assays with a series of IκBα truncation mutants. AURK significantly promoted activation of IκBα at serine 32 but not serine 36; by contrast, IκB kinase (IKK) family proteins activated both of these residues. We also confirmed phosphorylation of IκBα by matrix-assisted laser-desorption/ionization time-of-flight mass spectrometry (MALDI-TOF/TOF MS) and nano-liquid chromatography hybrid quadrupole orbitrap mass spectrometer (nanoLC-MS/MS; Q-Exactive). RESULTS: We identified two novel sites of serine phosphorylation, S63 and S262. Alanine substitution of S63 and S262 (S63A and S262A) of IκBα inhibited proliferation and suppressed p65 transcription activity. In addition, S63A and/or S262A of IκBα regulated apoptotic and necroptotic effects in breast cancer cells. CONCLUSIONS: Phosphorylation of IκBα by AURK at novel sites is related to the apoptosis and necroptosis pathways in breast cancer cells.


Assuntos
Aurora Quinase C/metabolismo , Neoplasias da Mama/patologia , Inibidor de NF-kappaB alfa/metabolismo , Necroptose , Sítios de Ligação/genética , Feminino , Humanos , Células MCF-7 , Mutagênese Sítio-Dirigida , Inibidor de NF-kappaB alfa/genética , Inibidor de NF-kappaB alfa/isolamento & purificação , NF-kappa B/metabolismo , Fosforilação , Proteínas Recombinantes/genética , Proteínas Recombinantes/isolamento & purificação , Proteínas Recombinantes/metabolismo , Espectrometria de Massas por Ionização e Dessorção a Laser Assistida por Matriz/métodos , Espectrometria de Massas em Tandem/métodos
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