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1.
Int J Mol Sci ; 25(7)2024 Mar 26.
Artigo em Inglês | MEDLINE | ID: mdl-38612512

RESUMO

TRAF7-related disorders represent some of the rarest inherited disorders, exhibiting clinical features that overlap with cardiac, facial, and digital anomalies with developmental delay (CAFDADD) syndrome, as well as blepharophimosis-mental retardation syndrome (BMRS). A 36-year-old male, presenting with total blindness, blepharophimosis, and intellectual disability, was admitted for the assessment of resting dyspnea several months previously. He had a history of being diagnosed with obstructive sleep apnea (OSA). Transesophageal and transthoracic echocardiography unveiled right ventricular dilatation without significant pulmonary hypertension, bicuspid aortic valve with aortic root aneurysm, and aortic regurgitation in the proband. Sanger sequencing identified a de novo TRAF7 variant (c.1964G>A; p.Arg655Gln). Subsequently, aortic root replacement using the Bentall procedure was performed. However, despite the surgery, he continued to experience dyspnea. Upon re-evaluating OSA with polysomnography, it was discovered that continuous positive airway pressure support alleviated his symptoms. The underlying cause of his symptoms was attributed to OSA, likely exacerbated by the vertebral anomaly and short neck associated with CAFDADD syndrome. Clinicians should be attentive to the symptoms associated with OSA as it is a potentially serious medical condition in patients with TRAF7 variants.


Assuntos
Blefarofimose , Anormalidades da Pele , Apneia Obstrutiva do Sono , Anormalidades Urogenitais , Masculino , Humanos , Adulto , Dispneia , República da Coreia , Peptídeos e Proteínas Associados a Receptores de Fatores de Necrose Tumoral
4.
Oncogene ; 43(7): 470-483, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38123820

RESUMO

TRAF-interacting protein (TRAIP), an E3 ligase containing a RING domain, has emerged as a significant contributor to maintaining genome integrity and is closely associated with cancer. Our study reveals that TRAIP shows reduced expression in bladder cancer (BLCA), which correlates with an unfavorable prognosis. In vitro and in vivo, TRAIP inhibits proliferation and migration of BLCA cells. MYC has been identified as a novel target for TRAIP, wherein direct interaction promotes K48-linked polyubiquitination at neighboring K428 and K430 residues, ultimately resulting in proteasome-dependent degradation and downregulation of MYC transcriptional activity. This mechanism effectively impedes the progression of BLCA. Restoring MYC expression reverses suppressed proliferation and migration of BLCA cells induced by TRAIP. Moreover, our results suggest that MYC may bind to the transcriptional start region of TRAIP, thereby exerting regulatory control over TRAIP transcription. Consequently, this interaction establishes a negative feedback loop that regulates MYC expression, preventing excessive levels. Taken together, this study reveals a mechanism that TRAIP inhibits proliferation and migration of BLCA by promoting ubiquitin-mediated degradation of MYC.


Assuntos
Peptídeos e Proteínas Associados a Receptores de Fatores de Necrose Tumoral , Neoplasias da Bexiga Urinária , Humanos , Peptídeos e Proteínas Associados a Receptores de Fatores de Necrose Tumoral/genética , Peptídeos e Proteínas Associados a Receptores de Fatores de Necrose Tumoral/metabolismo , Ubiquitina-Proteína Ligases/genética , Ubiquitina-Proteína Ligases/metabolismo , Ubiquitinação , Neoplasias da Bexiga Urinária/genética
5.
Int Urol Nephrol ; 56(5): 1639-1648, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38100027

RESUMO

BACKGROUND: TRAF-interacting protein (TRAIP) is a RING-type E3 ubiquitin ligase, which has been implicated in various cellular processes and participated in various cancers as an oncogene. However, the function and potential mechanism of TRAIP in prostate cancer (PCa) have not been investigated so far. METHODS: Public TGCA data were used to evaluate the expression profile of TRAIP in prostatic tumors. The relative expression of TRAIP and TRAF2 in PCa tissues and tumor cell lines was detected by qPCR, western blot, and IHC staining. Next, TRAIP knockdown and overexpression plasmids were constructed and transfected into PCa cell lines. Moreover, cell proliferation, invasion, migration, and apoptosis were measured by colony formation, Transwell, wound healing, and flow cytometry assays. Subsequently, cell cycle and signaling pathway-related proteins were tested by western blot. Finally, the effect of TRAIP on PCa was measured based on the nude mouse xenograft model. RESULTS: TRAIP was significantly upregulated in PCa tissues and tumor cell lines. In addition, TRAIP promoted cell proliferation, invasion, and migration of PCa cell lines. Such an oncogenic property was mediated by the cell cycle arrest and the inhibition of apoptosis, as indicated by different functional assays and the expression of cell cycle and apoptosis regulatory proteins in cultured cells. Moreover, TRAIP combined with TRAF2 to activate PI3K/AKT pathway. Finally, TRAIP depletion suppressed the growth of tumors and cell proliferation in vivo. CONCLUSIONS: Our study first revealed that TRAIP promoted tumor progression and identified it as a potential therapeutic target for PCa patients in the future.


Assuntos
Neoplasias da Próstata , Proteínas Proto-Oncogênicas c-akt , Masculino , Animais , Camundongos , Humanos , Fator 2 Associado a Receptor de TNF/genética , Fator 2 Associado a Receptor de TNF/metabolismo , Proteínas Proto-Oncogênicas c-akt/metabolismo , Peptídeos e Proteínas Associados a Receptores de Fatores de Necrose Tumoral/metabolismo , Fosfatidilinositol 3-Quinases , Neoplasias da Próstata/patologia , Ciclo Celular , Linhagem Celular Tumoral , Proliferação de Células , Apoptose/fisiologia , Ubiquitina-Proteína Ligases/metabolismo , Movimento Celular
6.
Int Immunopharmacol ; 122: 110605, 2023 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-37451021

RESUMO

BACKGROUND: Lung adenocarcinoma (LUAD) is one of the major types of lung cancer with high morbidity and mortality. The TRAF-interacting protein (TRAIP) is a ring-type E3 ubiquitin ligase which has been recently identified to play pivotal roles in various cancers. However, the expression and function of TRAIP in LUAD remain elusive. METHODS: In this study, we used bioinformatic tools as well as molecular experiments to explore the exact role of TRAIP and the underlying mechanism. RESULTS: Data mining across the UALCAN, GEPIA and GTEx, GEO and HPA databases revealed that TRAIP was significantly overexpressed in LUAD tissues than that in adjacent normal tissues. Kaplan-Meier curve showed that high TRAIP expression was associated with poor overall survival (OS) and relapse-free survival (RFS). Univariate and multivariate cox regression analysis revealed that TRAIP was an independent risk factor in LUAD. And the TRAIP-based nomogram further supported the prognostic role of TRAIP in LUAD. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis demonstrated that TRAIP-associated genes were mainly involved in DNA replication, cell cycle and other processes. The immune infiltration analysis indicated that TRAIP expression was tightly correlated with the infiltration of diverse immune cell types, including B cell, CD8 + T cell, neutrophil and dendritic cell. Moreover, TRAIP expression was observed to be significantly associated with tumor infiltrating lymphocytes (TILs) and immune checkpoint molecules. In vitro experiments further confirmed knockdown of TRAIP inhibited cell migration and invasion, as well as decreasing chemokine production and inhibiting M2-like macrophage recruitment. Lastly, CMap analysis identified 10 small molecule compounds that may target TRAIP, providing potential therapies for LUAD. CONCLUSIONS: Collectively, our study found that TRAIP is an oncogenic gene in LUAD, which may be a potential prognostic biomarker and promising therapeutic target for LUAD.


Assuntos
Adenocarcinoma de Pulmão , Neoplasias Pulmonares , Humanos , Peptídeos e Proteínas Associados a Receptores de Fatores de Necrose Tumoral , Prognóstico , Recidiva Local de Neoplasia , Adenocarcinoma de Pulmão/genética , Biomarcadores , Ubiquitina-Proteína Ligases
7.
Fish Shellfish Immunol ; 138: 108862, 2023 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-37263548

RESUMO

Tumor necrosis factor receptor-associated factors (TRAFs), as the signaling mediators of the tumor necrosis factor (TNFR) superfamily, toll-like receptors (TLR) and interleukin-1 receptor (IL-1R) superfamily, can activate downstream signal transduction pathways and play an important role in the body's immune process. In this study, six TRAF genes, namely PoTRAF2a, PoTRAF2b, PoTRAF3, PoTRAF4, PoTRAF6 and PoTRAF7, were identified and annotated in Japanese flounder by using bioinformatics methods. Phylogenetic analysis confirmed that TRAF genes can be divided into seven groups. Analysis of motif composition and gene structure demonstrated that all PoTRAF members were evolutionarily conserved. The expression patterns of PoTRAF genes were then further investigated in six different developmental stages and eleven tissues of healthy fish, and it was found that there were spatial and tissue specificities among the members. To investigate the immune response of Japanese flounder to abiotic and biotic stresses, we further analyzed the expression profile of PoTRAFs after temperature stress and pathogen challenge. The result showed that PoTRAF3 and PoTRAF4 were observably differentially expressed under temperature stress, indicating that they were involved in the immune response after temperature stress. The expression of PoTRAF2a, PoTRAF2b and PoTRAF4 was significantly different after E. tarda infection, suggesting that they might have antibacterial effects. These results would help to clarify the molecular roles of PoTRAF genes in the regulation of immune and inflammatory responses in Japanese flounder.


Assuntos
Infecções por Enterobacteriaceae , Doenças dos Peixes , Linguado , Animais , Regulação da Expressão Gênica , Edwardsiella tarda/fisiologia , Temperatura , Peptídeos e Proteínas Associados a Receptores de Fatores de Necrose Tumoral/genética , Filogenia
8.
Turk J Gastroenterol ; 34(6): 593-602, 2023 06.
Artigo em Inglês | MEDLINE | ID: mdl-37162503

RESUMO

BACKGROUND: Few studies have been conducted to explore the expression of tumor necrosis factor receptor-associated factor 6 in eosinophilic gastroenteritis patients. Therefore, the expression profile of tumor necrosis factor receptor-associated factor 6 in the gastrointestinal tract of eosinophilic gastroenteritis patients and its associations with clinical features were explored in this study. METHODS: Thirty-four eosinophilic gastroenteritis patients who presented in Ruijin Hospital from December 2012 to May 2019 and had accepted gastrointestinal endoscopic examinations were recruited. Medical records and endoscopic biopsies were collected, and the prognosis was followed up by telephone. Healthy persons were selected as the control group. Hematoxylin and eosin and immunohistochemical staining were performed in both eosinophilic gastroenteritis patients and healthy persons. The final results were analyzed by skilled pathologists, and mean optical density values of tumor necrosis factor receptor-associated factor 6 were calculated by Image J software. Final results were analyzed by Statistical Package for the Social Sciences software 22.0. RESULTS: Thirty-four patients (mean age: 25.56 ± 21.14 years, 61.76% males) were recruited for this study. There was no significant difference in tumor necrosis factor receptor-associated factor 6 mean optical density values of gastric tissues in eosinophilic gastroenteritis patients and healthy people (0.22 ± 0.16 vs. 0.14 ± 0.05, P > .05). Eosinophilic gastroenteritis patients had a significantly lower level of intestinal tumor necrosis factor receptor-associated factor 6 mean optical density values than that of healthy people (0.16 ± 0.05 vs. 0.23 ± 0.06, P < .05). Intestinal tumor necrosis factor receptor-associated factor 6 mean optical density values negatively linearly correlated with serum interleukin-10 level (r = -0.618, P = .043 < .05). There were no differences between eosinophilic gastroenteritis patients with or without relapse regarding the expression level of intestinal tumor necrosis factor receptor-associated factor 6 (P = .227 > .05). CONCLUSION: Patients with eosinophilic gastroenteritis might have a deficiency of intestinal tumor necrosis factor receptor-associated factor 6 compared to healthy controls.


Assuntos
Enterite , Masculino , Humanos , Pré-Escolar , Criança , Adolescente , Adulto Jovem , Adulto , Pessoa de Meia-Idade , Feminino , Prognóstico , Peptídeos e Proteínas Associados a Receptores de Fatores de Necrose Tumoral
9.
Turk J Gastroenterol ; 34(5): 490-496, 2023 05.
Artigo em Inglês | MEDLINE | ID: mdl-37158534

RESUMO

BACKGROUND: Alternative splicing of pre-messenger RNA is recognized as the crucial mechanism for gene expression regulation and proteome diversity generation. Alternative splicing has been found to be related to the pathogenesis of inflammatory bowel disease. The aim of this study was to identify the alternative splicing events in intestinal epithelial cells from mouse models of acute colitis and expand the understanding of the pathogenesis of inflammatory bowel disease. METHODS: The acute colitis mouse models were constructed, and intestinal epithelial cells of the colon were isolated for RNA sequence. The replicate Multivariate Analysis of Transcript Splicing software was used to analyze the alternative splicing events. The functional analysis was performed on genes with significant differential alternative splicing events. The alternative splicing events of picked genes were validated by reverse transcription polymerase chain reaction. RESULTS: A total of 340 significant differential alternative splicing events (from 293 genes) were screened out in acute colitis, and the alternative splicing events of CDK5-regulatory subunit associated protein 3 and TRM5 tRNA methyltransferase 5 were validated. The functional analysis showed that differential alternative splicing events in acute colitis participate in the apoptotic process, and the alternative splicing events of 3 genes (BCL2/adenovirus E1B-interacting protein 2, tumor necrosis factor receptor-associated factor 1, and tumor necrosis factor receptor-associated factor 7) were validated by reverse transcription polymerase chain reaction. CONCLUSION: This study pointed out the potential impact of different alternative splicing in acute colitis.


Assuntos
Colite , Doenças Inflamatórias Intestinais , Camundongos , Animais , Dextranos/efeitos adversos , Dextranos/metabolismo , Processamento Alternativo/genética , Mucosa Intestinal/patologia , Colite/induzido quimicamente , Colite/genética , Doenças Inflamatórias Intestinais/genética , Colo/patologia , Células Epiteliais/metabolismo , Peptídeos e Proteínas Associados a Receptores de Fatores de Necrose Tumoral/genética , Peptídeos e Proteínas Associados a Receptores de Fatores de Necrose Tumoral/metabolismo , Sulfato de Dextrana/toxicidade , Modelos Animais de Doenças , Camundongos Endogâmicos C57BL
10.
Mol Cell Probes ; 69: 101911, 2023 06.
Artigo em Inglês | MEDLINE | ID: mdl-37003349

RESUMO

Tumor necrosis factor receptor-related factor 7 (TRAF7) can regulate cell differentiation and apoptosis, but its specific functional mechanism in the pathological process of acute myeloid leukemia (AML) closely related to differentiation and apoptosis disorders is largely unclear. In this study, TRAF7 was found to be lowly expressed in AML patients and a variety of myeloid leukemia cells. TRAF7 was overexpressed in AML Molm-13 and chronic myeloid leukemia (CML) K562 cells by transfection with pcDNA3.1-TRAF7. CCK-8 assay and flow cytometry analysis showed that TRAF7 overexpression induced growth inhibition and apoptosis in K562 and Molm-13 cells. Measurements of glucose and lactate suggested that TRAF7 overexpression impaired glycolysis of K562 and Molm-13 cells. Cell cycle analysis indicated that most of K562 and Molm-13 cells were captured in G0/G1 phase by TRAF7 overexpression. PCR and western blot assay revealed that TRAF7 increased Kruppel-like factor 2 (KLF2) expression but decreased 6-phosphofructo-2-kinase/fructose-2,6-biphosphatase 3 (PFKFB3) expression in AML cells. KLF2 knockdown can counteract TRAF7-triggered PFKFB3 inhibition, and abolish TRAF7-mediated glycolysis inhibition and cell cycle arrest. KLF2 knockdown or PFKFB3 overexpression both can partially neutralize TRAF7-induced growth inhibition and apoptosis of K562 and Molm-13 cells. Moreover, Lv-TRAF7 decreased human CD45+ cells in mouse peripheral blood in the xenograft mice established by NOD/SCID mice. Taken together, TRAF7 exerts anti-leukemia effects by impairing glycolysis and cell cycle progression of myeloid leukemia cells via modulating the KLF2-PFKFB3 axis.


Assuntos
Apoptose , Leucemia Mieloide Aguda , Humanos , Animais , Camundongos , Linhagem Celular Tumoral , Proliferação de Células/genética , Camundongos Endogâmicos NOD , Camundongos SCID , Apoptose/genética , Glicólise/genética , Leucemia Mieloide Aguda/genética , Leucemia Mieloide Aguda/metabolismo , Monoéster Fosfórico Hidrolases/metabolismo , Fatores de Transcrição/metabolismo , Peptídeos e Proteínas Associados a Receptores de Fatores de Necrose Tumoral/metabolismo , Peptídeos e Proteínas Associados a Receptores de Fatores de Necrose Tumoral/farmacologia , Fatores de Transcrição Kruppel-Like/genética , Fatores de Transcrição Kruppel-Like/metabolismo , Fatores de Transcrição Kruppel-Like/farmacologia , Fosfofrutoquinase-2/metabolismo , Fosfofrutoquinase-2/farmacologia
11.
Virol Sin ; 38(3): 419-428, 2023 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-37086853

RESUMO

TANK-binding kinase 1 (TBK1) is a nodal protein involved in multiple signal transduction pathways. In RNA virus-mediated innate immunity, TBK1 is recruited to the prion-like platform formed by MAVS and subsequently activates the transcription factors IRF3/7 and NF-κB to produce type I interferon (IFN) and proinflammatory cytokines for the signaling cascade. In this study, TRAF7 was identified as a negative regulator of innate immune signaling. TRAF7 interacts with TBK1 and promotes K48-linked polyubiquitination and degradation of TBK1 through its RING domain, impairing the activation of IRF3 and the production of IFN-ß. In addition, we found that the conserved cysteine residues at position 131 of TRAF7 are necessary for its function toward TBK1. Knockout of TRAF7 could facilitate the activation of IRF3 and increase the transcript levels of downstream antiviral genes. These data suggest that TRAF7 negatively regulates innate antiviral immunity by promoting the K48-linked ubiquitination of TBK1.


Assuntos
Interferon Tipo I , Transdução de Sinais , Humanos , Ubiquitinação , Imunidade Inata , Antivirais , Células HEK293 , Proteínas Serina-Treonina Quinases/genética , Peptídeos e Proteínas Associados a Receptores de Fatores de Necrose Tumoral
12.
Proc Natl Acad Sci U S A ; 120(16): e2214997120, 2023 04 18.
Artigo em Inglês | MEDLINE | ID: mdl-37043537

RESUMO

While somatic variants of TRAF7 (Tumor necrosis factor receptor-associated factor 7) underlie anterior skull-base meningiomas, here we report the inherited mutations of TRAF7 that cause congenital heart defects. We show that TRAF7 mutants operate in a dominant manner, inhibiting protein function via heterodimerization with wild-type protein. Further, the shared genetics of the two disparate pathologies can be traced to the common origin of forebrain meninges and cardiac outflow tract from the TRAF7-expressing neural crest. Somatic and inherited mutations disrupt TRAF7-IFT57 interactions leading to cilia degradation. TRAF7-mutant meningioma primary cultures lack cilia, and TRAF7 knockdown causes cardiac, craniofacial, and ciliary defects in Xenopus and zebrafish, suggesting a mechanistic convergence for TRAF7-driven meningiomas and developmental heart defects.


Assuntos
Cardiopatias Congênitas , Neoplasias Meníngeas , Meningioma , Animais , Proteínas Adaptadoras de Transdução de Sinal/metabolismo , Cardiopatias Congênitas/genética , Neoplasias Meníngeas/genética , Meningioma/genética , Meningioma/patologia , Mutação , Crânio/metabolismo , Peixe-Zebra/genética , Peixe-Zebra/metabolismo , Proteínas de Peixe-Zebra/genética , Humanos , Peptídeos e Proteínas Associados a Receptores de Fatores de Necrose Tumoral
13.
Am J Med Genet A ; 191(7): 1990-1993, 2023 07.
Artigo em Inglês | MEDLINE | ID: mdl-37067385

RESUMO

Pathogenic variants in TRAF7 are often de novo and features of individuals harboring these variants are characterized by neurodevelopmental delay, ptosis, cardiac defects, limb anomalies, and dysmorphic features. We present a familial case in two African American patients with a novel, likely pathogenic c.1936G>A variant in TRAF7. Patient 1 is a 31-year-old female with a patent ductus arteriosus (PDA), intellectual disability, ptosis, and other dysmorphic features. She was identified to harbor this likely pathogenic variant in a mosaic (33.89%) state in leukocytes. Her son, Patient 2, is a 10-month-old male with a PDA, atrial septal defect, ptosis, developmental delay, history of feeding difficulties, congenital maxillary frenulum, and malrotation of the intestine. He has the same variant in a non-mosaic state. These cases demonstrate the variable expressivity observed with variants in TRAF7 within the same family and expand upon current understanding of mosaic TRAF7 variants. They also provide phenotypic data on genetic variation in individuals with African American ancestry, a population who has been underrepresented in the literature and may be less frequently referred to genetic specialists.


Assuntos
Blefaroptose , Permeabilidade do Canal Arterial , Comunicação Interatrial , Deficiência Intelectual , Anormalidades Musculoesqueléticas , Síndrome da Persistência do Padrão de Circulação Fetal , Adulto , Feminino , Humanos , Lactente , Masculino , Negro ou Afro-Americano/genética , Deficiências do Desenvolvimento/genética , Deficiência Intelectual/genética , Peptídeos e Proteínas Associados a Receptores de Fatores de Necrose Tumoral
14.
Am J Surg Pathol ; 47(2): 270-277, 2023 02 01.
Artigo em Inglês | MEDLINE | ID: mdl-36395468

RESUMO

TRAF7 somatic mutations are rare and have been reported in meningiomas, intraneural perineuriomas, and mesotheliomas. Triggered by an index case of an unclassified low-grade mesenchymal tumor with TRAF7 mutation as the only genetic alteration, we searched our files and identified 2 additional cases with similar features. The tumors arose in 2 females and 1 male, aged 63 to 75 years old (median: 67 y). They were infiltrative deep soft tissue masses involving the shoulder, chest wall, and thigh, measuring 7.0 to 9.1 cm in greatest dimensions. One tumor was locally aggressive, and 2 were associated with lung and bone metastases. The tumors displayed alternating fibrous and myxoid stroma with mild to moderate cellularity and consisted of uniform spindle cells with open chromatin, inconspicuous nucleoli and scant cytoplasm. Significant mitotic activity or necrosis were not present. However, the metastatic tumor of 1 case showed an epithelioid morphology and brisk mitotic activity. Immunohistochemically, the tumors showed nonspecific and focal smooth muscle actin or CD34 expression. By DNA sequencing, all 3 cases harbored TRAF7 missense mutations involving the C-terminal WD40 domains as the only somatic mutations, showed nonrecurrent focal copy number alterations, and were negative for gene fusions by targeted RNA sequencing. On methylation profiling, the tumors clustered with the undifferentiated sarcoma and myxofibrosarcoma methylation classes and were distinct from morphologic mimics. On follow-up (5 to 36 mo), 2 patients died of disease following aggressive chemotherapeutic regimens. We describe a novel TRAF7- mutated mesenchymal tumor characterized by aggressive clinical behavior despite the histologic appearance of a low-grade fibromyxoid spindle cell tumor.


Assuntos
Fibroma , Fibrossarcoma , Neoplasias Hepáticas , Sarcoma , Neoplasias de Tecidos Moles , Feminino , Adulto , Humanos , Masculino , Pessoa de Meia-Idade , Idoso , Metilação , Sarcoma/genética , Sarcoma/patologia , Neoplasias de Tecidos Moles/genética , Neoplasias de Tecidos Moles/patologia , Fibrossarcoma/patologia , Fibroma/patologia , Progressão da Doença , Biomarcadores Tumorais/genética , Biomarcadores Tumorais/metabolismo , Peptídeos e Proteínas Associados a Receptores de Fatores de Necrose Tumoral
15.
Clin Hemorheol Microcirc ; 84(1): 1-18, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36463437

RESUMO

BACKGROUND: Propofol is an anesthetic agent and can impede the progression of human diseases. Circular RNA (circRNA) circ_0003645 has been identified to promote the development of atherosclerosis (AS). This study aimed at the functional mechanism of propofol and circ_0003645 in AS. METHODS: AS cell model was established by treatment of oxidized low-density lipoprotein (ox-LDL) in human umbilical vein endothelial cells (HUVECs). Cell viability or apoptosis detection was performed by Cell Counting Kit-8 (CCK-8) assay and flow cytometry. Circ_0003645, microRNA-149-3p (miR-149-3p) and tumor necrosis factor receptor-associated factor 7 (TRAF7) levels were determined by the quantitative real-time polymerase chain reaction (qRT-PCR). Inflammatory cytokines were examined using enzyme-linked immunosorbent assay (ELISA). Protein analysis was conducted by western blot. The interaction of miR-149-3p and circ_0003645 or TRAF7 was analyzed using dual-luciferase reporter assay and RNA immunoprecipitation (RIP) assay. RESULTS: Treatment of ox-LDL inhibited cell viability and enhanced apoptosis in HUVECs to establish the AS cell model. Propofol protected against cell viability inhibition and apoptosis promotion in AS cell model. Circ_0003645 expression was downregulated by propofol in AS cell model. Propofol alleviated cell apoptosis and inflammation by decreasing the circ_0003645 level. Circ_0003645 targeted miR-149-3p, and circ_0003645/miR-149-3p axis was involved in the functional regulation of propofol. TRAF7 was the target of miR-149-3p. Inhibition of miR-149-3p affected the function of propofol by upregulating the TRAF7 expression. Circ_0003645 sponged miR-149-3p to induce the upregulation of TRAF7 following propofol treatment. CONCLUSION: It has been suggested that propofol acted as an inhibitor against the ox-LDL-induced cell injury by the circ_0003645/miR-149-3p/TRAF7 axis.


Assuntos
Aterosclerose , MicroRNAs , Propofol , Humanos , Propofol/farmacologia , Células Endoteliais da Veia Umbilical Humana , Apoptose , Aterosclerose/tratamento farmacológico , Aterosclerose/genética , MicroRNAs/genética , Lipoproteínas LDL , Proliferação de Células , Peptídeos e Proteínas Associados a Receptores de Fatores de Necrose Tumoral
16.
Fish Shellfish Immunol ; 130: 538-549, 2022 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-36152800

RESUMO

In the current study, full-length Toll-like receptor 4 (TLR4) cDNA was cloned and characterised in Tor putitora, an important fish inhibiting Himalayan rivers. The complete coding sequence of TpTLR4 is 2457 bp with nine key structural domains, including six leucine-rich repeats (LRRs). The phylogenetic tree revealed that TpTLR4 showed the closest relationship with TLR4 of Cyprinus carpio (96%), Labeo rohita (91%) and Megalobrama amblycephala (88%), all belonging to the Cyprinidae family. CELLO2GO tool revealed that TpTLR4 protein is highly localised in the plasma (67.7%), and the protein has a strong association with myeloid differentiation primary response 88 (MYD88) followed by Tumor necrosis factor receptor-associated factor (TRAF) family. In the toll-interleukin-1 receptor (TIR) domain of TpTLR4, the proline is replaced by the alanine amino acid, thus may give plasticity to the receptor to recognise both bacterial and viral ligands. Molecular docking has revealed that TpTLR4 showed the strongest affinity towards poly (I:C) with the binding energy of -6.1 kcal/mol and five hydrogen bonds among all ligands. Based on our molecular docking results, it can be presumed that TpTLR4 can sense bacterial, fungal and viral molecular patterns with binding sites mainly present in the TpTLR4 LRR9 motif, which spans between 515 and 602 amino acids. Tor putiora TLR4 transcript was ubiquitously expressed in all the tested fish tissues. Although, transcript level was found to be highest in blood and spleen followed by the kidney. The TpTLR4 transcripts showed peak expression in spleen and kidney at 12 h post-injection (hpi) (p < 0.05) of poly (I:C). The constitutive expression of TpTLR4 in various tissues, up-regulation in different tissues and strong binding affinities with poly (I:C) indicate that TpTLR4 may play an essential role in sensing pathogen-associated molecular patterns (PAMPs), particularly of viral origin.


Assuntos
Carpas , Cyprinidae , Alanina , Sequência de Aminoácidos , Animais , Sítios de Ligação , Carpas/metabolismo , Cyprinidae/genética , Cyprinidae/metabolismo , DNA Complementar/genética , Proteínas de Peixes/química , Leucina/metabolismo , Ligantes , Simulação de Acoplamento Molecular , Fator 88 de Diferenciação Mieloide/genética , Moléculas com Motivos Associados a Patógenos/metabolismo , Filogenia , Prolina/genética , Prolina/metabolismo , Receptores de Interleucina-1/genética , Receptor 4 Toll-Like/química , Peptídeos e Proteínas Associados a Receptores de Fatores de Necrose Tumoral/genética
17.
J Immunol ; 209(9): 1788-1795, 2022 11 01.
Artigo em Inglês | MEDLINE | ID: mdl-36113884

RESUMO

Chronic lung allograft dysfunction is the major barrier to long-term survival in lung transplant recipients. Evidence supports type 1 alloimmunity as the predominant response in acute/chronic lung rejection, but the immunoregulatory mechanisms remain incompletely understood. We studied the combinatorial F-box E3 ligase system: F-box protein 3 (FBXO3; proinflammatory) and F-box and leucine-rich repeat protein 2 (FBXL2; anti-inflammatory and regulates TNFR-associated factor [TRAF] protein). Using the mouse orthotopic lung transplant model, we evaluated allografts from BALB/c → C57BL/6 (acute rejection; day 10) and found significant induction of FBXO3 and diminished FBXL2 protein along with elevated T-bet, IFN-γ, and TRAF proteins 1-5 compared with isografts. In the acute model, treatment with costimulation blockade (MR1/CTLA4-Ig) resulted in attenuated FBXO3, preserved FBXL2, and substantially reduced T-bet, IFN-γ, and TRAFs 1-5, consistent with a key role for type 1 alloimmunity. Immunohistochemistry revealed significant changes in the FBXO3/FBXL2 balance in airway epithelia and infiltrating mononuclear cells during rejection compared with isografts or costimulation blockade-treated allografts. In the chronic lung rejection model, DBA/2J/C57BL/6F1 > DBA/2J (day 28), we observed persistently elevated FBXO3/FBXL2 balance and T-bet/IFN-γ protein and similar findings from lung transplant recipient lungs with chronic lung allograft dysfunction versus controls. We hypothesized that FBXL2 regulated T-bet and found FBXL2 was sufficient to polyubiquitinate T-bet and coimmunoprecipitated with T-bet on pulldown experiments and vice versa in Jurkat cells. Transfection with FBXL2 diminished T-bet protein in a dose-dependent manner in mouse lung epithelial cells. In testing type 1 cytokines, TNF-α was found to negatively regulate FBXL2 protein and mRNA levels. Together, our findings show the combinatorial E3 ligase FBXO3/FBXL2 system plays a role in the regulation of T-bet through FBXL2, with negative cross-regulation of TNF-α on FBXL2 during lung allograft rejection.


Assuntos
Proteínas F-Box , Animais , Camundongos , Abatacepte , Aloenxertos , Citocinas/metabolismo , Modelos Animais de Doenças , Proteínas F-Box/genética , Proteínas F-Box/metabolismo , Rejeição de Enxerto , Pulmão/metabolismo , Camundongos Endogâmicos BALB C , Camundongos Endogâmicos C57BL , Camundongos Endogâmicos DBA , RNA Mensageiro , Peptídeos e Proteínas Associados a Receptores de Fatores de Necrose Tumoral/metabolismo , Fator de Necrose Tumoral alfa/metabolismo , Ubiquitina-Proteína Ligases/metabolismo
18.
Animal ; 16(9): 100621, 2022 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-36049261

RESUMO

Camelina sativa is an alternative protein source (with a specific amino acid profile) rich also in bioactive compounds (such as polyunsaturated fatty acids and antioxidants), which have immunomodulatory properties. This study aimed to assess the impact of the dietary inclusion level of Camelina seeds, on the expression levels of key genes involved in ewes' innate immunity. Forty-eight dairy ewes were assigned into four homogenous groups of 12 animals that were fed individually with alfalfa hay, wheat straw, and concentrate. The concentrate of the control group (CON) had no Camelina seeds, while in the treated groups, Camelina seeds (CSs) were incorporated at 6 (CS6), 11 (CS11), and 16% (CS16) in the concentrates, respectively, as partial substitution of both soybean meal and maize grain. The relative transcript levels of the immune-related genes were determined using a real-time PCR platform. The relative transcript levels of toll-interleukin receptor-domain-containing adapter-inducing interferon-ß, tumour necrosis factor receptor-associated factor 3, Interferon regulatory factor 5, and Mitogen-activated protein kinase were upregulated in monocytes of the CS11-fed ewes. Furthermore, in the CS6-fed ewes, the relative transcript levels of Interleukin-1 beta (IL1B) were upregulated in monocytes compared to the CON, while those of IL1B, Interleukin-8, and Interleukin-10 were upregulated in neutrophils compared to the CON and the CS11-fed ewes. The highest inclusion level of CS (CS16) did not have a negative impact on ewes' innate immunity. The response of monocytes on dietary amino acid (mainly threonine, tyrosine, serine, and lysine) changes related to Camelina inclusion is different from that of neutrophils. The observed responses need to be further investigated.


Assuntos
Aminoácidos , Brassicaceae , Ração Animal/análise , Animais , Dieta/veterinária , Ácidos Graxos/análise , Ácidos Graxos Insaturados , Feminino , Imunidade Inata , Fatores Reguladores de Interferon , Interferon beta , Interleucina-10 , Interleucina-1beta , Interleucina-8 , Lisina , Proteínas Quinases Ativadas por Mitógeno , Sementes/química , Serina , Ovinos , Treonina , Peptídeos e Proteínas Associados a Receptores de Fatores de Necrose Tumoral , Tirosina
20.
Clin Genet ; 102(2): 164-165, 2022 08.
Artigo em Inglês | MEDLINE | ID: mdl-35684978

RESUMO

Diagnosis of a pathogenic germline TRAF7 missense variant (c.1555 C > T, p.L519F) made on a prenatal basis by exome sequencing (ES) performed on chorionic villi. This case highlights the importance of both higher-level prenatal ultrasounds and the accessibility of ES in making genetic diagnoses in making pregnancy management decisions.


Assuntos
Anormalidades Múltiplas , Exoma , Diagnóstico Pré-Natal , Peptídeos e Proteínas Associados a Receptores de Fatores de Necrose Tumoral , Anormalidades Múltiplas/diagnóstico , Anormalidades Múltiplas/genética , Exoma/genética , Feminino , Células Germinativas , Humanos , Gravidez , Peptídeos e Proteínas Associados a Receptores de Fatores de Necrose Tumoral/genética , Peptídeos e Proteínas Associados a Receptores de Fatores de Necrose Tumoral/metabolismo , Ultrassonografia Pré-Natal
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