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2.
J Genet ; 1032024.
Artículo en Inglés | MEDLINE | ID: mdl-38736250

RESUMEN

In acute lymphoblastic leukaemia (ALL), elevated foetal haemoglobin (HbF) levels have been associated with the prognosis of patients. Genetic variants in HbF regulatory genes: BAF chromatin remodelling complex subunit (BCL11A), HBS1L-MYB transcriptional GTPase intergenic region (HBS1L-MYB), Krüppel-like factor 1 (KLF1), haemoglobin gamma subunit 2 (HBG2), haemoglobin gamma subunit 1 (HBG1), and haemoglobin subunit beta pseudogene 1 (HBBP1) are often associatedwith elevatedHbF concentration. This study investigated the association of genetic variants in HbF regulatory genes with HbF concentration, unfavourable prognosis, and outcome in children with ALL.We quantified HbF concentration and genotyped 17 genetic variants in 48 patients with ALL and 64 children without ALL as a reference group. HbF concentrationwas higher in patients than in the reference group (4.4%vs 1.4%), and 75%(n = 36) of thepatientshadHbF>2.5%.Unfavourable prognosis ALL was established in 68.8% (n = 33) of the patients. Variant HBG2 rs7482144 was associated with high HbF concentration (P = 0.015); while HBS1L-MYB rs9399137 (P = 0.001), HBG2 rs7482144 (P = 0.001) and the ß-globin genes HBG2, HBG1, and HBPP1 haplotypeTGC(P = 0.017) with unfavourable prognosisALL.Additionally, variantBCL11A rs4671393 showed a protective role (P = 0.0001). In conclusion, variants HBG2 rs7482144, HBS1L-MYB rs9399137 and BCL11A rs4671393 may play a significant role in ALL.


Asunto(s)
Hemoglobina Fetal , Polimorfismo de Nucleótido Simple , Leucemia-Linfoma Linfoblástico de Células Precursoras , Proteínas Represoras , Humanos , Hemoglobina Fetal/genética , Femenino , Masculino , Niño , Pronóstico , Proteínas Represoras/genética , Preescolar , Leucemia-Linfoma Linfoblástico de Células Precursoras/genética , Lactante , Proteínas Nucleares/genética , Proteínas Proto-Oncogénicas c-myb/genética , Proteínas Portadoras/genética , Adolescente , Genotipo , gamma-Globinas/genética , Proteínas de Unión al GTP
3.
PeerJ ; 12: e17360, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38737746

RESUMEN

Breast cancer is the most common invasive neoplasm and the leading cause of cancer death in women worldwide. The main cause of mortality in cancer patients is invasion and metastasis, where the epithelial-mesenchymal transition (EMT) is a crucial player in these processes. Pharmacological therapy has plants as its primary source, including isoflavonoids. Brazilin is an isoflavonoid isolated from Haematoxilum brasiletto that has shown antiproliferative activity in several cancer cell lines. In this study, we evaluated the effect of Brazilin on canonical markers of EMT such as E-cadherin, vimentin, Twist, and matrix metalloproteases (MMPs). By Western blot, we evaluated E-cadherin, vimentin, and Twist expression and the subcellular localization by immunofluorescence. Using gelatin zymography, we determined the levels of secretion of MMPs. We used Transwell chambers coated with matrigel to determine the in vitro invasion of breast cancer cells treated with Brazilin. Interestingly, our results show that Brazilin increases 50% in E-cadherin expression and decreases 50% in vimentin and Twist expression, MMPs, and cell invasion in triple-negative breast cancer (TNBC) MDA-MB-231 and to a lesser extend in MCF7 ER+ breast cancer cells. Together, these findings position Brazilin as a new molecule with great potential for use as complementary or alternative treatment in breast cancer therapy in the future.


Asunto(s)
Benzopiranos , Neoplasias de la Mama , Cadherinas , Transición Epitelial-Mesenquimal , Proteína 1 Relacionada con Twist , Vimentina , Humanos , Transición Epitelial-Mesenquimal/efectos de los fármacos , Femenino , Cadherinas/metabolismo , Vimentina/metabolismo , Vimentina/genética , Línea Celular Tumoral , Proteína 1 Relacionada con Twist/metabolismo , Proteína 1 Relacionada con Twist/genética , Benzopiranos/farmacología , Neoplasias de la Mama/patología , Neoplasias de la Mama/tratamiento farmacológico , Neoplasias de la Mama/metabolismo , Neoplasias de la Mama/genética , Neoplasias de la Mama Triple Negativas/patología , Neoplasias de la Mama Triple Negativas/tratamiento farmacológico , Neoplasias de la Mama Triple Negativas/metabolismo , Neoplasias de la Mama Triple Negativas/genética , Células MCF-7 , Biomarcadores de Tumor/metabolismo , Biomarcadores de Tumor/genética , Invasividad Neoplásica/genética , Metaloproteinasas de la Matriz/metabolismo , Metaloproteinasas de la Matriz/genética , Proteínas Nucleares
4.
J Cancer Res Clin Oncol ; 150(5): 267, 2024 May 21.
Artículo en Inglés | MEDLINE | ID: mdl-38769118

RESUMEN

BACKGROUND: Ewing's sarcoma (ES) is an aggressive cancer of bone and soft tissue, most of which tend to occur in the bone. Extraosseous Ewing's sarcoma (EES) of the cervix is extremely rare. CASE PRESENTATION: In the present work, we reported a 39-year-old cervical EES patient with a 2.5*2.1*1.8 cm tumor mass. According to previous literatures, our case is the smallest tumor found in primary cervical ES ever. The patient initially came to our hospital due to vaginal bleeding, and then the gynecological examination found a neoplasm between the cervical canal and partially in the external cervical orifice. The diagnosis of EES was confirmed below: Hematoxylin & Eosin staining (H&E) revealed small round blue malignant cells in biopsy specimens. Immunohistochemistry (IHC) showed the positive staining for CD99, NKX2.2, and FLI1. Disruption of EWSR1 gene was found by fluorescence in situ hybridization (FISH), and the EWSR1-FLI1 gene fusion was determined by next-generation sequencing (NGS). The patient received laparoscopic wide hysterectomy, bilateral adnexectomy, pelvic lymphadenectomy, and postoperative adjuvant chemotherapy and remained disease free with regular follow-up for 1 year. CONCLUSIONS: Through a systematic review of previously reported cervical ES and this case, we highlighted the importance of FISH and NGS for the accuracy of ESS diagnosis, which could assist on the optimal treatment strategy. However, due to the rarity of the disease, there is no standard treatment schemes. Investigation on molecular pathological diagnosis and standardization of treatment regimens for cervical ES are critical to patients' prognosis.


Asunto(s)
Sarcoma de Ewing , Neoplasias del Cuello Uterino , Humanos , Femenino , Sarcoma de Ewing/patología , Sarcoma de Ewing/genética , Sarcoma de Ewing/diagnóstico , Neoplasias del Cuello Uterino/patología , Neoplasias del Cuello Uterino/genética , Neoplasias del Cuello Uterino/diagnóstico , Neoplasias del Cuello Uterino/cirugía , Adulto , Proteínas de Fusión Oncogénica/genética , Proteína Homeobox Nkx-2.2 , Proteína EWS de Unión a ARN/genética , Hibridación Fluorescente in Situ , Factores de Transcripción/genética , Proteína Proto-Oncogénica c-fli-1/genética , Proteínas Nucleares , Proteínas de Homeodominio
5.
Int J Mol Sci ; 25(9)2024 Apr 23.
Artículo en Inglés | MEDLINE | ID: mdl-38731828

RESUMEN

HLA-DR-positive NK cells, found in both healthy individuals and patients with different inflammatory diseases, are characterized as activated cells. However, data on their capacity for IFNγ production or cytotoxic response vary between studies. Thus, more precise investigation is needed of the mechanisms related to the induction of HLA-DR expression in NK cells, their associations with NK cell differentiation stage, and functional or metabolic state. In this work, HLA-DR-expressing NK cell subsets were investigated using transcriptomic analysis, metabolic activity assays, and analysis of intercellular signaling cascades. We demonstrated that HLA-DR+CD56bright NK cells were characterized by a proliferative phenotype, while HLA-DR+CD56dim NK cells exhibited features of adaptive cells and loss of inhibitory receptors with increased expression of MHC class II trans-activator CIITA. The activated state of HLA-DR-expressing NK cells was confirmed by higher levels of ATP and mitochondrial mass observed in this subset compared to HLA-DR- cells, both ex vivo and after stimulation in culture. We showed that HLA-DR expression in NK cells in vitro can be induced both through stimulation by exogenous IL-2 and IL-21, as well as through auto-stimulation by NK-cell-produced IFNγ. At the intracellular level, HLA-DR expression depended on the activation of STAT3- and ERK1/2-mediated pathways, with subsequent activation of isoform 3 of the transcription factor CIITA. The obtained results broaden the knowledge about HLA-DR-positive NK cell appearance, diversity, and functions, which might be useful in terms of understanding the role of this subset in innate immunity and assessing their possible implications in NK cell-based therapy.


Asunto(s)
Diferenciación Celular , Antígenos HLA-DR , Interferón gamma , Células Asesinas Naturales , Células Asesinas Naturales/metabolismo , Células Asesinas Naturales/inmunología , Humanos , Antígenos HLA-DR/metabolismo , Antígenos HLA-DR/genética , Interferón gamma/metabolismo , Antígeno CD56/metabolismo , Activación de Linfocitos/inmunología , Interleucina-2/metabolismo , Interleucina-2/farmacología , Células Cultivadas , Proteínas Nucleares , Transactivadores
6.
Int J Mol Sci ; 25(9)2024 Apr 23.
Artículo en Inglés | MEDLINE | ID: mdl-38731837

RESUMEN

Chromatin architecture is critical for the temporal and tissue-specific activation of genes that determine eukaryotic development. The functional interaction between enhancers and promoters is controlled by insulators and tethering elements that support specific long-distance interactions. However, the mechanisms of the formation and maintenance of long-range interactions between genome regulatory elements remain poorly understood, primarily due to the lack of convenient model systems. Drosophila became the first model organism in which architectural proteins that determine the activity of insulators were described. In Drosophila, one of the best-studied DNA-binding architectural proteins, Su(Hw), forms a complex with Mod(mdg4)-67.2 and CP190 proteins. Using a combination of CRISPR/Cas9 genome editing and attP-dependent integration technologies, we created a model system in which the promoters and enhancers of two reporter genes are separated by 28 kb. In this case, enhancers effectively stimulate reporter gene promoters in cis and trans only in the presence of artificial Su(Hw) binding sites (SBS), in both constructs. The expression of the mutant Su(Hw) protein, which cannot interact with CP190, and the mutation inactivating Mod(mdg4)-67.2, lead to the complete loss or significant weakening of enhancer-promoter interactions, respectively. The results indicate that the new model system effectively identifies the role of individual subunits of architectural protein complexes in forming and maintaining specific long-distance interactions in the D. melanogaster model.


Asunto(s)
Proteínas de Drosophila , Elementos de Facilitación Genéticos , Regiones Promotoras Genéticas , Proteínas de Drosophila/metabolismo , Proteínas de Drosophila/genética , Animales , Drosophila melanogaster/genética , Drosophila melanogaster/metabolismo , Sistemas CRISPR-Cas , Proteínas de Unión al ADN/metabolismo , Proteínas de Unión al ADN/genética , Cromatina/metabolismo , Cromatina/genética , Elementos Aisladores/genética , Sitios de Unión , Unión Proteica , Proteínas Nucleares/metabolismo , Proteínas Nucleares/genética , Edición Génica/métodos , Proteínas Represoras/metabolismo , Proteínas Represoras/genética , Proteínas Asociadas a Microtúbulos
7.
Int J Mol Sci ; 25(9)2024 Apr 24.
Artículo en Inglés | MEDLINE | ID: mdl-38731849

RESUMEN

Tumors of the head and neck, more specifically the squamous cell carcinoma, often show upregulation of the Hedgehog signaling pathway. However, almost nothing is known about its role in the sinonasal adenocarcinoma, either in intestinal or non-intestinal subtypes. In this work, we have analyzed immunohistochemical staining of six Hedgehog pathway proteins, sonic Hedgehog (SHH), Indian Hedgehog (IHH), Patched1 (PTCH1), Gli family zinc finger 1 (GLI1), Gli family zinc finger 2 (GLI2), and Gli family zinc finger 3 (GLI3), on 21 samples of sinonasal adenocarcinoma and compared them with six colon adenocarcinoma and three salivary gland tumors, as well as with matching healthy tissue, where available. We have detected GLI2 and PTCH1 in the majority of samples and also GLI1 in a subset of samples, while GLI3 and the ligands SHH and IHH were generally not detected. PTCH1 pattern of staining shows an interesting pattern, where healthy samples are mostly positive in the stromal compartment, while the signal shifts to the tumor compartment in tumors. This, taken together with a stronger signal of GLI2 in tumors compared to non-tumor tissues, suggests that the Hedgehog pathway is indeed activated in sinonasal adenocarcinoma. As Hedgehog pathway inhibitors are being tested in combination with other therapies for head and neck squamous cell carcinoma, this could provide a therapeutic option for patients with sinonasal adenocarcinoma as well.


Asunto(s)
Adenocarcinoma , Proteínas Hedgehog , Inmunohistoquímica , Transducción de Señal , Proteína Gli2 con Dedos de Zinc , Humanos , Proteínas Hedgehog/metabolismo , Proteínas Hedgehog/genética , Adenocarcinoma/metabolismo , Adenocarcinoma/patología , Masculino , Femenino , Proteína Gli2 con Dedos de Zinc/metabolismo , Proteína Gli2 con Dedos de Zinc/genética , Persona de Mediana Edad , Proyectos Piloto , Anciano , Receptor Patched-1/metabolismo , Receptor Patched-1/genética , Proteína con Dedos de Zinc GLI1/metabolismo , Proteína con Dedos de Zinc GLI1/genética , Proteína Gli3 con Dedos de Zinc/metabolismo , Proteína Gli3 con Dedos de Zinc/genética , Neoplasias de los Senos Paranasales/metabolismo , Neoplasias de los Senos Paranasales/patología , Adulto , Regulación Neoplásica de la Expresión Génica , Proteínas del Tejido Nervioso , Proteínas Nucleares
8.
Int J Mol Sci ; 25(9)2024 Apr 24.
Artículo en Inglés | MEDLINE | ID: mdl-38731851

RESUMEN

COVID-19 is characterized by a wide range of clinical manifestations, where aging, underlying diseases, and genetic background are related to worse outcomes. In the present study, the differential expression of seven genes related to immunity, IRF9, CCL5, IFI6, TGFB1, IL1B, OAS1, and TFRC, was analyzed in individuals with COVID-19 diagnoses of different disease severities. Two-step RT-qPCR was performed to determine the relative gene expression in whole-blood samples from 160 individuals. The expression of OAS1 (p < 0.05) and IFI6 (p < 0.05) was higher in moderate hospitalized cases than in severe ones. Increased gene expression of OAS1 (OR = 0.64, CI = 0.52-0.79; p = 0.001), IRF9 (OR = 0.581, CI = 0.43-0.79; p = 0.001), and IFI6 (OR = 0.544, CI = 0.39-0.69; p < 0.001) was associated with a lower risk of requiring IMV. Moreover, TGFB1 (OR = 0.646, CI = 0.50-0.83; p = 0.001), CCL5 (OR = 0.57, CI = 0.39-0.83; p = 0.003), IRF9 (OR = 0.80, CI = 0.653-0.979; p = 0.03), and IFI6 (OR = 0.827, CI = 0.69-0.991; p = 0.039) expression was associated with patient survival. In conclusion, the relevance of OAS1, IRF9, and IFI6 in controlling the viral infection was confirmed.


Asunto(s)
2',5'-Oligoadenilato Sintetasa , COVID-19 , Subunidad gamma del Factor 3 de Genes Estimulados por el Interferón , SARS-CoV-2 , Humanos , 2',5'-Oligoadenilato Sintetasa/genética , COVID-19/genética , COVID-19/inmunología , COVID-19/virología , Masculino , Femenino , Persona de Mediana Edad , Subunidad gamma del Factor 3 de Genes Estimulados por el Interferón/genética , Subunidad gamma del Factor 3 de Genes Estimulados por el Interferón/metabolismo , Proteínas Nucleares/genética , Adulto , Anciano , Proteínas Mitocondriales
9.
J Cell Biol ; 223(6)2024 Jun 03.
Artículo en Inglés | MEDLINE | ID: mdl-38709216

RESUMEN

Autophagy is an essential degradation program required for cell homeostasis. Among its functions is the engulfment and destruction of cytosolic pathogens, termed xenophagy. Not surprisingly, many pathogens use various strategies to circumvent or co-opt autophagic degradation. For poxviruses, it is known that infection activates autophagy, which however is not required for successful replication. Even though these complex viruses replicate exclusively in the cytoplasm, autophagy-mediated control of poxvirus infection has not been extensively explored. Using the prototypic poxvirus, vaccinia virus (VACV), we show that overexpression of the xenophagy receptors p62, NDP52, and Tax1Bp1 restricts poxvirus infection. While NDP52 and Tax1Bp1 were degraded, p62 initially targeted cytoplasmic virions before being shunted to the nucleus. Nuclear translocation of p62 was dependent upon p62 NLS2 and correlated with VACV kinase mediated phosphorylation of p62 T269/S272. This suggests that VACV targets p62 during the early stages of infection to avoid destruction and further implies that poxviruses exhibit multi-layered control of autophagy to facilitate cytoplasmic replication.


Asunto(s)
Autofagia , Núcleo Celular , Proteína Sequestosoma-1 , Virus Vaccinia , Humanos , Transporte Activo de Núcleo Celular , Núcleo Celular/metabolismo , Núcleo Celular/virología , Células HEK293 , Células HeLa , Proteínas Nucleares/metabolismo , Proteínas Nucleares/genética , Fosforilación , Proteína Sequestosoma-1/metabolismo , Proteína Sequestosoma-1/genética , Vaccinia/metabolismo , Vaccinia/virología , Vaccinia/genética , Virus Vaccinia/metabolismo , Virus Vaccinia/genética , Replicación Viral
10.
JCI Insight ; 9(9)2024 May 08.
Artículo en Inglés | MEDLINE | ID: mdl-38716726

RESUMEN

Childhood-onset essential hypertension (COEH) is an uncommon form of hypertension that manifests in childhood or adolescence and, in the United States, disproportionately affects children of African ancestry. The etiology of COEH is unknown, but its childhood onset, low prevalence, high heritability, and skewed ancestral demography suggest the potential to identify rare genetic variation segregating in a Mendelian manner among affected individuals and thereby implicate genes important to disease pathogenesis. However, no COEH genes have been reported to date. Here, we identify recessive segregation of rare and putatively damaging missense variation in the spectrin domain of spectrin repeat containing nuclear envelope protein 1 (SYNE1), a cardiovascular candidate gene, in 3 of 16 families with early-onset COEH without an antecedent family history. By leveraging exome sequence data from an additional 48 COEH families, 1,700 in-house trios, and publicly available data sets, we demonstrate that compound heterozygous SYNE1 variation in these COEH individuals occurred more often than expected by chance and that this class of biallelic rare variation was significantly enriched among individuals of African genetic ancestry. Using in vitro shRNA knockdown of SYNE1, we show that reduced SYNE1 expression resulted in a substantial decrease in the elasticity of smooth muscle vascular cells that could be rescued by pharmacological inhibition of the downstream RhoA/Rho-associated protein kinase pathway. These results provide insights into the molecular genetics and underlying pathophysiology of COEH and suggest a role for precision therapeutics in the future.


Asunto(s)
Proteínas del Citoesqueleto , Hipertensión Esencial , Secuenciación del Exoma , Proteínas del Tejido Nervioso , Adolescente , Niño , Femenino , Humanos , Masculino , Edad de Inicio , Proteínas del Citoesqueleto/genética , Hipertensión Esencial/genética , Exoma/genética , Predisposición Genética a la Enfermedad , Mutación Missense/genética , Proteínas del Tejido Nervioso/genética , Proteínas Nucleares/genética , Linaje , Proteína de Unión al GTP rhoA/genética , Estados Unidos/epidemiología , Recién Nacido , Lactante , Preescolar , Adulto Joven
11.
Life Sci Alliance ; 7(7)2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38724194

RESUMEN

NUT carcinoma (NC) is an aggressive cancer with no effective treatment. About 70% of NUT carcinoma is associated with chromosome translocation events that lead to the formation of a BRD4::NUTM1 fusion gene. Because the BRD4::NUTM1 gene is unequivocally cytotoxic when ectopically expressed in cell lines, questions remain on whether the fusion gene can initiate NC. Here, we report the first genetically engineered mouse model for NUT carcinoma that recapitulates the human t(15;19) chromosome translocation in mice. We demonstrated that the mouse t(2;17) syntenic chromosome translocation, forming the Brd4::Nutm1 fusion gene, could induce aggressive carcinomas in mice. The tumors present histopathological and molecular features similar to human NC, with enrichment of undifferentiated cells. Similar to the reports of human NC incidence, Brd4::Nutm1 can induce NC from a broad range of tissues with a strong phenotypical variability. The consistent induction of poorly differentiated carcinoma demonstrated a strong reprogramming activity of BRD4::NUTM1. The new mouse model provided a critical preclinical model for NC that will lead to better understanding and therapy development for NC.


Asunto(s)
Proteínas Nucleares , Proteínas de Fusión Oncogénica , Factores de Transcripción , Animales , Ratones , Proteínas de Fusión Oncogénica/genética , Humanos , Factores de Transcripción/genética , Factores de Transcripción/metabolismo , Proteínas Nucleares/genética , Proteínas Nucleares/metabolismo , Modelos Animales de Enfermedad , Carcinoma/genética , Carcinoma/metabolismo , Translocación Genética/genética , Proteínas de Neoplasias/genética , Proteínas de Neoplasias/metabolismo , Proteínas de Ciclo Celular/genética , Proteínas de Ciclo Celular/metabolismo , Proteínas que Contienen Bromodominio
12.
Commun Biol ; 7(1): 549, 2024 May 09.
Artículo en Inglés | MEDLINE | ID: mdl-38724689

RESUMEN

Amphiphysin 2 (BIN1) is a membrane and actin remodeling protein mutated in congenital and adult centronuclear myopathies. Here, we report an unexpected function of this N-BAR domain protein BIN1 in filopodia formation. We demonstrated that BIN1 expression is necessary and sufficient to induce filopodia formation. BIN1 is present at the base of forming filopodia and all along filopodia, where it colocalizes with F-actin. We identify that BIN1-mediated filopodia formation requires IRSp53, which allows its localization at negatively-curved membrane topologies. Our results show that BIN1 bundles actin in vitro. Finally, we identify that BIN1 regulates the membrane-to-cortex architecture and functions as a molecular platform to recruit actin-binding proteins, dynamin and ezrin, to promote filopodia formation.


Asunto(s)
Actinas , Proteínas Adaptadoras Transductoras de Señales , Proteínas del Tejido Nervioso , Seudópodos , Proteínas Supresoras de Tumor , Seudópodos/metabolismo , Actinas/metabolismo , Proteínas Supresoras de Tumor/metabolismo , Proteínas Supresoras de Tumor/genética , Humanos , Proteínas Adaptadoras Transductoras de Señales/metabolismo , Proteínas Adaptadoras Transductoras de Señales/genética , Animales , Proteínas del Tejido Nervioso/metabolismo , Proteínas del Tejido Nervioso/genética , Membrana Celular/metabolismo , Ratones , Proteínas Nucleares/metabolismo , Proteínas Nucleares/genética
13.
Proc Natl Acad Sci U S A ; 121(22): e2320468121, 2024 May 28.
Artículo en Inglés | MEDLINE | ID: mdl-38768356

RESUMEN

Spontaneous gain or loss of DNA methylation occurs in plant and animal genomes, and DNA methylation changes can lead to meiotically stable epialleles that generate heritable phenotypic diversity. However, it is unclear whether transgenerational epigenetic stability may be regulated by any cellular factors. Here, we examined spontaneously occurring variations in DNA methylation in wild-type and ros1 mutant Arabidopsis plants that were propagated for ten generations from single-seed descent. We found that the ros1 mutant, which is defective in active DNA demethylation, showed an increased transgenerational epimutation rate. The ros1 mutation led to more spontaneously gained methylation than lost methylation at individual cytosines, compared to the wild type which had similar numbers of spontaneously gained and lost methylation cytosines. Consistently, transgenerational differentially methylated regions were also biased toward hypermethylation in the ros1 mutant. Our results reveal a genetic contribution of the ROS1 DNA demethylase to transgenerational epigenetic stability and suggest that ROS1 may have an unexpected surveillance function in preventing transgenerational DNA methylation increases.


Asunto(s)
Proteínas de Arabidopsis , Arabidopsis , Desmetilación del ADN , Metilación de ADN , Epigénesis Genética , Mutación , Arabidopsis/genética , Arabidopsis/metabolismo , Proteínas de Arabidopsis/genética , Proteínas de Arabidopsis/metabolismo , Regulación de la Expresión Génica de las Plantas , ADN de Plantas/genética , ADN de Plantas/metabolismo , Proteínas Nucleares
14.
Mol Med ; 30(1): 67, 2024 May 21.
Artículo en Inglés | MEDLINE | ID: mdl-38773379

RESUMEN

BACKGROUND: Gouty arthritis (GA) is characterized by monosodium urate (MSU) crystal accumulation that instigates NLRP3-mediated pyroptosis; however, the underlying regulatory mechanisms have yet to be fully elucidated. The present research endeavors to elucidate the regulatory mechanisms underpinning this MSU-induced pyroptotic cascade in GA. METHODS: J774 cells were exposed to lipopolysaccharide and MSU crystals to establish in vitro GA models, whereas C57BL/6 J male mice received MSU crystal injections to mimic in vivo GA conditions. Gene and protein expression levels were evaluated using real-time quantitative PCR, Western blotting, and immunohistochemical assays. Inflammatory markers were quantified via enzyme-linked immunosorbent assays. Pyroptosis was evaluated using immunofluorescence staining for caspase-1 and flow cytometry with caspase-1/propidium iodide staining. The interaction between MDM2 and PPARγ was analyzed through co-immunoprecipitation assays, whereas the interaction between BRD4 and the MDM2 promoter was examined using chromatin immunoprecipitation and dual-luciferase reporter assays. Mouse joint tissues were histopathologically evaluated using hematoxylin and eosin staining. RESULTS: In GA, PPARγ was downregulated, whereas its overexpression mitigated NLRP3 inflammasome activation and pyroptosis. MDM2, which was upregulated in GA, destabilized PPARγ through the ubiquitin-proteasome degradation pathway, whereas its silencing attenuated NLRP3 activation by elevating PPARγ levels. Concurrently, BRD4 was elevated in GA and exacerbated NLRP3 activation and pyroptosis by transcriptionally upregulating MDM2, thereby promoting PPARγ degradation. In vivo experiments showed that BRD4 silencing ameliorated GA through this MDM2-PPARγ-pyroptosis axis. CONCLUSION: BRD4 promotes inflammation and pyroptosis in GA through MDM2-mediated PPARγ degradation, underscoring the therapeutic potential of targeting this pathway in GA management.


Asunto(s)
Artritis Gotosa , PPAR gamma , Proteínas Proto-Oncogénicas c-mdm2 , Piroptosis , Factores de Transcripción , Animales , PPAR gamma/metabolismo , PPAR gamma/genética , Artritis Gotosa/metabolismo , Artritis Gotosa/genética , Artritis Gotosa/patología , Artritis Gotosa/inducido químicamente , Ratones , Proteínas Proto-Oncogénicas c-mdm2/metabolismo , Proteínas Proto-Oncogénicas c-mdm2/genética , Masculino , Factores de Transcripción/metabolismo , Factores de Transcripción/genética , Modelos Animales de Enfermedad , Proteolisis , Línea Celular , Inflamasomas/metabolismo , Ratones Endogámicos C57BL , Proteína con Dominio Pirina 3 de la Familia NLR/metabolismo , Proteína con Dominio Pirina 3 de la Familia NLR/genética , Ácido Úrico/metabolismo , Proteínas que Contienen Bromodominio , Proteínas Nucleares
15.
Dis Model Mech ; 17(4)2024 Apr 01.
Artículo en Inglés | MEDLINE | ID: mdl-38691001

RESUMEN

Ankyrin repeat and LEM domain-containing 2 (ANKLE2) is a scaffolding protein with established roles in cell division and development, the dysfunction of which is increasingly implicated in human disease. ANKLE2 regulates nuclear envelope disassembly at the onset of mitosis and its reassembly after chromosome segregation. ANKLE2 dysfunction is associated with abnormal nuclear morphology and cell division. It regulates the nuclear envelope by mediating protein-protein interactions with barrier to autointegration factor (BANF1; also known as BAF) and with the kinase and phosphatase that modulate the phosphorylation state of BAF. In brain development, ANKLE2 is crucial for proper asymmetric division of neural progenitor cells. In humans, pathogenic loss-of-function mutations in ANKLE2 are associated with primary congenital microcephaly, a condition in which the brain is not properly developed at birth. ANKLE2 is also linked to other disease pathologies, including congenital Zika syndrome, cancer and tauopathy. Here, we review the molecular roles of ANKLE2 and the recent literature on human diseases caused by its dysfunction.


Asunto(s)
Proteínas Nucleares , Humanos , Proteínas Nucleares/metabolismo , Animales , Enfermedad , Proteínas de Unión al ADN/metabolismo , Proteínas de Unión al ADN/genética , Mutación/genética
16.
FASEB J ; 38(9): e23637, 2024 May 15.
Artículo en Inglés | MEDLINE | ID: mdl-38720403

RESUMEN

Vascular smooth muscle cell (VSMC) plasticity is fundamental in uterine spiral artery remodeling during placentation in Eutherian mammals. Our previous work showed that the invasion of trophoblast cells into uterine myometrium coincides with a phenotypic change of VSMCs. Here, we elucidate the mechanism by which trophoblast cells confer VSMC plasticity. Analysis of genetic markers on E13.5, E16.5, and E19.5 in the rat metrial gland, the entry point of uterine arteries, revealed that trophoblast invasion is associated with downregulation of MYOCARDIN, α-smooth muscle actin, and calponin1, and concomitant upregulation of Smemb in VSMCs. Myocardin overexpression or knockdown in VSMCs led to upregulation or downregulation of contractile markers, respectively. Co-culture of trophoblast cells with VSMCs decreased MYOCARDIN expression along with compromised expression of contractile markers in VSMCs. However, co-culture of trophoblast cells with VSMCs overexpressing MYOCARDIN inhibited their change in phenotype, whereas, overexpression of transactivation domain deleted MYOCARDIN failed to elicit this response. Furthermore, the co-culture of trophoblast cells with VSMCs led to the activation of NFκß signaling. Interestingly, despite producing IL-1ß, trophoblast cells possess only the decoy receptor, whereas, VSMCs possess the IL-1ß signaling receptor. Treatment of VSMCs with exogenous IL-1ß led to a decrease in MYOCARDIN and an increase in phosphorylation of NFκß. The effect of trophoblast cells in the downregulation of MYOCARDIN in VSMCs was reversed by blocking NFκß translocation to the nucleus. Together, these data highlight that trophoblast cells direct VSMC plasticity, and trophoblast-derived IL-1ß is a key player in downregulating MYOCARDIN via the NFκß signaling pathway.


Asunto(s)
Interleucina-1beta , Músculo Liso Vascular , Miocitos del Músculo Liso , FN-kappa B , Proteínas Nucleares , Transducción de Señal , Transactivadores , Trofoblastos , Animales , Trofoblastos/metabolismo , Músculo Liso Vascular/metabolismo , Músculo Liso Vascular/citología , Transactivadores/metabolismo , Transactivadores/genética , Ratas , Proteínas Nucleares/metabolismo , Proteínas Nucleares/genética , Transducción de Señal/fisiología , FN-kappa B/metabolismo , Femenino , Miocitos del Músculo Liso/metabolismo , Interleucina-1beta/metabolismo , Embarazo , Técnicas de Cocultivo , Ratas Sprague-Dawley , Células Cultivadas , Plasticidad de la Célula/fisiología , Calponinas
17.
Nat Commun ; 15(1): 4123, 2024 May 15.
Artículo en Inglés | MEDLINE | ID: mdl-38750014

RESUMEN

Avian influenza A viruses (IAVs) pose a public health threat, as they are capable of triggering pandemics by crossing species barriers. Replication of avian IAVs in mammalian cells is hindered by species-specific variation in acidic nuclear phosphoprotein 32 (ANP32) proteins, which are essential for viral RNA genome replication. Adaptive mutations enable the IAV RNA polymerase (FluPolA) to surmount this barrier. Here, we present cryo-electron microscopy structures of monomeric and dimeric avian H5N1 FluPolA with human ANP32B. ANP32B interacts with the PA subunit of FluPolA in the monomeric form, at the site used for its docking onto the C-terminal domain of host RNA polymerase II during viral transcription. ANP32B acts as a chaperone, guiding FluPolA towards a ribonucleoprotein-associated FluPolA to form an asymmetric dimer-the replication platform for the viral genome. These findings offer insights into the molecular mechanisms governing IAV genome replication, while enhancing our understanding of the molecular processes underpinning mammalian adaptations in avian-origin FluPolA.


Asunto(s)
Microscopía por Crioelectrón , Genoma Viral , Subtipo H5N1 del Virus de la Influenza A , Proteínas Nucleares , Replicación Viral , Humanos , Subtipo H5N1 del Virus de la Influenza A/genética , Replicación Viral/genética , Proteínas Nucleares/metabolismo , Proteínas Nucleares/genética , Proteínas Nucleares/química , Animales , ARN Polimerasa Dependiente del ARN/metabolismo , ARN Polimerasa Dependiente del ARN/genética , ARN Polimerasa Dependiente del ARN/química , Proteínas de Unión al ARN/metabolismo , Proteínas de Unión al ARN/genética , Proteínas Virales/metabolismo , Proteínas Virales/genética , Proteínas Virales/química , Adaptación Fisiológica/genética , Gripe Humana/virología , ARN Viral/metabolismo , ARN Viral/genética , Células HEK293 , Multimerización de Proteína , Modelos Moleculares
18.
Proc Natl Acad Sci U S A ; 121(20): e2321919121, 2024 May 14.
Artículo en Inglés | MEDLINE | ID: mdl-38713625

RESUMEN

Successful regeneration of missing tissues requires seamless integration of positional information along the body axes. Planarians, which regenerate from almost any injury, use conserved, developmentally important signaling pathways to pattern the body axes. However, the molecular mechanisms which facilitate cross talk between these signaling pathways to integrate positional information remain poorly understood. Here, we report a p21-activated kinase (smed-pak1) which functionally integrates the anterior-posterior (AP) and the medio-lateral (ML) axes. pak1 inhibits WNT/ß-catenin signaling along the AP axis and, functions synergistically with the ß-catenin-independent WNT signaling of the ML axis. Furthermore, this functional integration is dependent on warts and merlin-the components of the Hippo/Yorkie (YKI) pathway. Hippo/YKI pathway is a critical regulator of body size in flies and mice, but our data suggest the pathway regulates body axes patterning in planarians. Our study provides a signaling network integrating positional information which can mediate coordinated growth and patterning during planarian regeneration.


Asunto(s)
Tipificación del Cuerpo , Planarias , Proteínas Serina-Treonina Quinasas , Regeneración , Vía de Señalización Wnt , Quinasas p21 Activadas , Animales , Regeneración/fisiología , Planarias/fisiología , Planarias/genética , Planarias/metabolismo , Quinasas p21 Activadas/metabolismo , Quinasas p21 Activadas/genética , Vía de Señalización Wnt/fisiología , Tipificación del Cuerpo/genética , Tipificación del Cuerpo/fisiología , Proteínas Serina-Treonina Quinasas/metabolismo , Proteínas Serina-Treonina Quinasas/genética , Transactivadores/metabolismo , Transactivadores/genética , Proteínas Nucleares/metabolismo , Proteínas Nucleares/genética
19.
Proc Natl Acad Sci U S A ; 121(20): e2402180121, 2024 May 14.
Artículo en Inglés | MEDLINE | ID: mdl-38717859

RESUMEN

Membrane tubulation coupled with fission (MTCF) is a widespread phenomenon but mechanisms for their coordination remain unclear, partly because of the lack of assays to monitor dynamics of membrane tubulation and subsequent fission. Using polymer cushioned bilayer islands, we analyze the membrane tubulator Bridging Integrator 1 (BIN1) mixed with the fission catalyst dynamin2 (Dyn2). Our results reveal this mixture to constitute a minimal two-component module that demonstrates MTCF. MTCF is an emergent property and arises because BIN1 facilitates recruitment but inhibits membrane binding of Dyn2 in a dose-dependent manner. MTCF is therefore apparent only at high Dyn2 to BIN1 ratios. Because of their mutual involvement in T-tubules biogenesis, mutations in BIN1 and Dyn2 are associated with centronuclear myopathies and our analysis links the pathology with aberrant MTCF. Together, our results establish cushioned bilayer islands as a facile template for the analysis of membrane tubulation and inform of mechanisms that coordinate MTCF.


Asunto(s)
Proteínas Adaptadoras Transductoras de Señales , Dinamina II , Proteínas Supresoras de Tumor , Dinamina II/metabolismo , Dinamina II/genética , Humanos , Proteínas Adaptadoras Transductoras de Señales/metabolismo , Proteínas Adaptadoras Transductoras de Señales/genética , Proteínas Supresoras de Tumor/metabolismo , Proteínas Supresoras de Tumor/genética , Membrana Celular/metabolismo , Proteínas Nucleares/metabolismo , Proteínas Nucleares/genética , Dinámicas Mitocondriales/fisiología , Miopatías Estructurales Congénitas/genética , Miopatías Estructurales Congénitas/metabolismo
20.
Medicine (Baltimore) ; 103(18): e37984, 2024 May 03.
Artículo en Inglés | MEDLINE | ID: mdl-38701255

RESUMEN

Hepatocellular carcinoma (HCC) is one of the most common malignant tumors globally and often develops on the foundation of chronic liver disease or cirrhosis. Cirrhosis is a clinically prevalent chronic progressive liver disease characterized by diffuse liver damage resulting from long-term or repeated actions of 1 or more etiological factors. However, the impact of CENPF and nuclear division cycle 80 (NDC80) genes on rehabilitation nursing of HCC and cirrhosis remains unclear. HCC and cirrhosis datasets GSE63898 and GSE89377 profile files were downloaded from the gene expression omnibus database generated on platforms GPL13667 and GPL6947, respectively. Differentially expressed genes (DEGs) screening, weighted gene co-expression network analysis (WGCNA), construction and analysis of protein-protein interaction (PPI) networks, functional enrichment analysis, gene set enrichment analysis (GSEA), survival analysis, immune infiltration analysis, and comparative toxicogenomics database (CTD) analysis were conducted. Gene expression heatmaps were plotted. miRNAs regulating central DEGs were selected through TargetScan. A total of 626 DEGs were identified. According to gene ontology (GO) analysis, they were primarily enriched in small molecule metabolic processes, drug metabolic processes, binding of identical proteins, and lipid metabolic processes. Kyoto Encyclopedia of Gene and Genome (KEGG) analysis results indicated that the target genes were mainly enriched in metabolic pathways, phagosomes, glycine, serine, and threonine metabolism. The construction and analysis of the PPI network revealed 3 core genes (NDC80, CENPF, RRM2). Gene expression heatmaps showed that core genes (CENPF, NDC80) were highly expressed in HCC and cirrhosis samples. CTD analysis found that 2 genes (CENPF and NDC80) were associated with liver, jaundice, ascites, fever, dyspepsia, and hepatic encephalopathy. CENPF and NDC80 are highly expressed in HCC and cirrhosis, and CENPF and NDC80 might be the biomarkers of rehabilitation nursing of HCC and cirrhosis.


Asunto(s)
Carcinoma Hepatocelular , Proteínas del Citoesqueleto , Cirrosis Hepática , Neoplasias Hepáticas , Carcinoma Hepatocelular/genética , Humanos , Neoplasias Hepáticas/genética , Cirrosis Hepática/genética , Proteínas Nucleares/genética , Proteínas Nucleares/metabolismo , Mapas de Interacción de Proteínas , Perfilación de la Expresión Génica
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