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1.
Braz. j. biol ; 83: e245330, 2023. tab, graf
Article in English | MEDLINE, LILACS, VETINDEX | ID: biblio-1339394

ABSTRACT

Abstract Background The brain is an organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals. Aim The study examined the expression of Neuroglobin (Ngb) and Hypoxia-inducible factor-1α (Hif-1α) in adult and young yak brain tissues, and provided researchers with meaningful insight into the anatomy, physiology, and biochemistry of this mammal. Method The study employed immunohistochemistry (IHC), quantitative real-time PCR (qRT-PCR), and Western blot (WB) to obtain the results. Results Ngb and Hif-1α were significantly (P<0.05) expressed in the cerebellar cortex, piriform lobe, medulla, and corpus callosum of the adult yak while in the young yak brain tissues, the protein expressions were significantly found in the white matter of the cerebellum, pineal gland, corpus callosum, and cerebellar cortex. The Ngb and Hif-1α expression showed similarities and differences. This may have resulted from similar animal species, source of nutrition, age factors, brain size, emotional activities, and communication. The findings documented that Ngb and Hif-1α are commonly expressed in various adult and young yak brain tissues. Multiple roles in the brain tissues of the adult and young yaks are involved in the expression and distribution and are proposed to play a significant role in the adaptation of the yak to the high altitude environment. Conclusion This study provides meaningful data to understand the adaptive mechanism to hypoxia and recommended researchers to expand on the adaptive mechanism and brain tissues that are not recorded.


Resumo Contexto O cérebro é um órgão que funciona como o centro do sistema nervoso em todos os animais vertebrados e na maioria dos invertebrados. Objetivo O estudo examinou a expressão de neuroglobina (Ngb) e fator-1α indutível por hipóxia (Hif-1α) em tecidos cerebrais de iaques adultos e jovens e forneceu aos pesquisadores uma visão significativa da anatomia, fisiologia e bioquímica desse mamífero. Método O estudo utilizou imuno-histoquímica (IHC), PCR quantitativo em tempo real (qRT-PCR) e western blot (WB) para a obtenção dos resultados. Resultados Ngb e Hif-1α foram significativamente (P < 0,05) expressos no córtex cerebelar, lobo piriforme, medula e corpo caloso do iaque adulto, enquanto nos tecidos cerebrais do iaque jovem as expressões proteicas foram encontradas significativamente na substância branca do cerebelo, glândula pineal, corpo caloso e córtex cerebelar. A expressão de Ngb e Hif-1α apresentou semelhanças e diferenças. Isso pode ter resultado de espécies animais semelhantes, fonte de nutrição, fatores de idade, tamanho do cérebro, atividades emocionais e comunicação. Os resultados documentaram que o Ngb e o Hif-1α são comumente expressos em vários tecidos cerebrais de iaques adultos e jovens. Múltiplos papéis nos tecidos cerebrais de iaques adultos e jovens estão envolvidos na expressão e distribuição e são propostos para desempenhar um papel significativo na adaptação do iaque ao ambiente de alta altitude. Conclusão Este estudo fornece dados significativos para compreender o mecanismo adaptativo à hipóxia e recomendou que os pesquisadores expandissem o mecanismo adaptativo e os tecidos cerebrais que não foram registrados.


Subject(s)
Animals , Hypoxia-Inducible Factor 1, alpha Subunit/genetics , Hypoxia , Brain , RNA, Messenger , Cattle , Neuroglobin
2.
Braz. j. biol ; 83: e248911, 2023. tab, graf
Article in English | MEDLINE, LILACS, VETINDEX | ID: biblio-1339362

ABSTRACT

Abstract The telencephalon refers to the most highly developed and anterior part of the forebrain, consisting mainly of the cerebral hemispheres. The study determined Neuroglobin (Ngb) and Hypoxia-inducible factor (HIF-1α) expression in the telencephalon of yak and cattle, and compare the expression and distribution pattern of Ngb and HIF-1α in the two animals. Immunohistochemistry (IHC), quantitative real-time Polymerase Chain Reaction (qRT-PCR), and Western blot (WB) were employed to investigate Ngb and Hif-1α expression in the telencephalon of yak and cattle. mRNA and protein expressions of Ngb and HIF-1α showed positive in different tissues of the yak and cattle telencephalon. Ngb expression in tissues of the yak recorded higher as compare to cattle while HIF-1α expression was found higher in cattle than yak. The HIF-1α expression in some tissues of yak telencephalon was consistent with the cattle. The results documented that HIF-1α may have a direct or indirect synergistic effect on Ngb expression in the yak telencephalon to improve hypoxia adaptation. It is suggested that yak may need more Ngb expression for adaptation, but the expression of HIF-1α seems to be down-regulated during long-term adaptation, and the specific causes of this phenomenon needs to be further verified.


Resumo O telencéfalo refere-se à parte anterior e mais desenvolvida do prosencéfalo, consistindo principalmente dos hemisférios cerebrais. O estudo determinou a expressão de neuroglobina (Ngb) e fator indutível por hipóxia (HIF-1α) no telencéfalo de iaques e bovinos e comparou a expressão e o padrão de distribuição de Ngb e HIF-1α nos dois animais. Imuno-histoquímica (IHC), reação em cadeia da polimerase quantitativa em tempo real (qRT-PCR) e Western blot (WB) foram empregados para investigar a expressão de Ngb e Hif-1α no telencéfalo de iaques e bovinos. As expressões de mRNA e proteínas de Ngb e HIF-1α mostraram-se positivas em diferentes tecidos do telencéfalo de iaque e bovino. A expressão de Ngb nos tecidos do iaque foi registrada mais alta em comparação com o gado, enquanto a expressão do HIF-1α foi encontrada mais alta no gado do que no iaque. A expressão de HIF-1α em alguns tecidos do telencéfalo de iaque foi consistente com o gado. Os resultados documentaram que o HIF-1α pode ter um efeito sinérgico direto ou indireto na expressão de Ngb no telencéfalo de iaque para melhorar a adaptação à hipóxia. É sugerido que o iaque pode precisar de mais expressão de Ngb para adaptação, mas a expressão de HIF-1α parece ser regulada para baixo durante a adaptação de longo prazo, e as causas específicas desse fenômeno precisam ser verificadas.


Subject(s)
Animals , Telencephalon , Hypoxia-Inducible Factor 1, alpha Subunit/genetics , RNA, Messenger/genetics , Cattle , Adaptation, Physiological , Neuroglobin
3.
Lima; Instituto Nacional de Salud; sept. 2021.
Non-conventional in Spanish | LILACS, BRISA | ID: biblio-1354092

ABSTRACT

INTRODUCCIÓN: La enfermedad por el coronavirus 2019 (COVID-19) causada por el coronavirus 2 del Síndrome respiratorio agudo grave o SARS-CoV-2 fue inicialmente reportada en Wuhan, China en diciembre de 2019. El 30 de enero de 2020 la OMS determinó que la COVID-19 representaba una emergencia de salud pública de importancia internacional y posteriormente el 11 de marzo del 2020 fue declarada como pandemia. A partir de diciembre de ese mismo año, se inició la vacunación contra la COVID-19 en el mundo. La Administración de Alimentos y Medicamentos (FDA) de los Estados Unidos, el 11 de diciembre de 2020, emitió una autorización de uso de emergencia (EUA) para la vacuna de tipo ARNm BNT162b2 desarrollada por Pfizer-BioNTech para su uso en personas a partir de los 16 años. En base a los resultados de un ensayo clínico de fase 3 (2), esta EUA se amplió para adolescentes de 12 a 15 años el 10 de mayo de 2021. En el Perú, el Ministerio de Salud (MINSA) aprobó la utilización de la vacuna BNT162b2/Pfizer-BioNTech en adolescente de 12 a 17 años con comorbilidades específicas a partir del mes de junio en base a la autorización de la Dirección General de Medicamentos (DIGEMID) (3). Hasta la fecha de la redacción de este informe, 17 de setiembre de 2021, en el Perú se habían administrado 18 953 dosis (1° dosis: 14 958 y 2° dosis: 3 995) de la vacuna de Pfizer-BioNTech en adolescentes de 12 a 16 años. OBJETIVO: Sintetizar la evidencia disponible sobre la eficacia, efectividad y seguridad de las vacunas contra COVID-19 basadas en ARN mensajero (ARNm) en adolescentes de 12 a 17 años. METODOLOGÍA: Pregunta PICO abordada: En adolescentes de 12 a 17 años ¿la administración de vacunas de ARNm contra COVID-19 es eficaz y segura? Criterios de elegibilidad: Los criterios de selección de los estudios fueron los siguientes: Estudios que corresponden a la pregunta PICO planteada y que reporten resultados para al menos uno de los desenlaces considerados. Los estudios que incluyeron adultos y adolescente fueron incluidos si reportaban resultados desagregados para la población de interés. Idioma: inglés, español y portugués. Se incluyeron estudios publicados y manuscritos sin revisión por pares (pre-print). Se excluyeron cartas al editor, revisiones narrativas, estudios preclínicos (estudios in vitro o en modelos animales) y artículos de opinión. Las cartas al editor, cartas de investigación y comentarios fueron incluidos sólo si brindaban datos suficientes sobre las características de los participantes, intervención y desenlaces. Las revisiones sistemáticas recuperadas y las referencias de las publicaciones relevantes fueron analizadas para identificar estudios adicionales que cumpliesen con los criterios de selección establecidos. Métodos de búsqueda: La búsqueda sistemática se realizó en MEDLINE/Pubmed, medRxiv (un servidor de distribución de manuscritos aún no publicados, sin revisión por pares) y en la Plataforma Living Overview of the Evidence (L·OVE) de la Fundación Epistemonikos, con fecha 15 y 16 de setiembre de 2021, incluyendo términos en lenguaje natural y lenguaje estructurado (Tesauros), según cada base de datos, para adolescentes y las vacunas de ARNm consideradas. Los resultados de las búsquedas fueron importados al gestor de referencias Zotero versión 5.0.96.3 para la identificación y eliminación de los artículos duplicados. Esta etapa fue realizada por una sola autora. Selección de evidencia y extracción de datos: La selección de estudios consideró una fase inicial de lectura de títulos y resúmenes, realizada de manera pareada e independiente por dos autoras utilizando el software Rayyan®, seguida de una fase de lectura del texto completo de las referencias potencialmente relevantes identificadas. Para la extracción de datos se utilizó una plantilla diseñada en Google Sheets. La selección por texto completo y la extracción de datos fue realizada de forma individual por cada autora. Análisis de los datos: Se realizó una síntesis narrativa de los datos extraídos. No se consideró la realización de un meta-análisis debido a la heterogeneidad de los estudios identificados (tipo de intervención y diseño de estudio). Evaluación de certeza de la evidencia: En un primer paso se realizó la evaluación de riesgo de sesgo de los estudios incluidos utilizando herramientas de acuerdo al diseño de investigación. Se empleó la Herramienta para evaluar riesgo de sesgo de ensayos clínicos aleatorizados de la Colaboración Cochrane versión 2 (RoB 2)(8) y para las series de caso, se empleó la lista de verificación para evaluación crítica de Joanna Briggs Institute para series de casos (9) (preguntas 1-8 y 10) y la herramienta para evaluar la calidad metodológica de reportes de caso y series de casos de Murad et al.(10) (ítems 4 y 8). En una segunda etapa, los estudios con mejor calidad metodológica o menor riesgo de sesgo fueron considerados para la evaluación de la certeza de la evidencia según la metodología GRADE, que toma en cuenta los siguientes criterios: diseño del estudio, riesgo de sesgo, inconsistencia en los resultados, ausencia de evidencia directa, imprecisión, sesgo de publicación, tamaño de efecto, gradiente dosis-respuesta, y efecto de los potenciales factores de confusión residual (los tres últimos aplicables en estudios observacionales)(11,12). RESULTADOS: Se identificaron 303 citaciones. Luego de la eliminación de duplicados, tamizaje de títulos y resúmenes y lectura de textos completos, se seleccionaron 13 estudios, reportados en 14 artículos (1 estudio con 2 reportes de diferentes periodos de seguimiento). Dos artículos estuvieron disponibles como pre-print. CONCLUSIONES: El objetivo del presente documento fue sintetizar la evidencia científica disponible respecto a la eficacia y seguridad de las vacunas basadas en ARNm en adolescentes de 12 a 17 años, específicamente para la vacuna BNT162b2 de Pfizer-BioNTech y la vacuna mRNA-1273 desarrolada por Moderna. Se identificaron 2 ensayos clínicos aleatorizados que evaluaron la eficacia y seguridad de estas vacunas, además de 11 series de caso que reportan la ocurrencia de miocarditis luego de la vacunación en adolescentes de 12 a 17 años. La eficacia de 2 dosis de BNT162b2 para prevenir COVID-19 (infección sintomática) en participantes de 12 a 15 años, se estimó en 100% (IC 95%: 75.3 ­ 100) (1983 participantes, con un seguimiento de al menos 2 meses en el 58% de ellos). Para el subgrupo de 16 a 17 años, esta eficacia se estimó en 100% (IC 95%: 58.2­100.0) (673 participantes, con un seguimiento de hasta 6 meses luego de la 2o dosis). La certeza de la evidencia es moderada debido a imprecisión. La eficacia del esquema de 2 dosis con la vacuna mRNA-1273 para prevenir COVID-19 en adolescentes de 12 a 17 años es de 93.3% (IC 95%: 47.9 - 99.9) (1 ensayo clínico aletorizado, 3181 participantes, seguimiento de 53 días luego de la 2o dosis). La certeza de evidencia es moderada debido a imprecisión. Se desconoce la eficacia de la vacunación con BNT162b2 ó mRNA-1273 para prevenir COVID-19 severo y mortalidad, ya que no se observaron estos eventos en los ensayos clínicos identificados. La incidencia de eventos adversos serios en el grupo de adolescentes de 12 a 15 años vacunados con BNT162b2, fue mayor a lo reportado en el grupo placebo (Incidencia de 0.4% versus 0.1%, riesgo relativo (RR): 3.99 (IC 95%: 0.45 a 35.67) (1 ensayo clínico, 2260 participantes). Ninguno de estos eventos fue catalogado como relacionado a la vacunación. La certeza de la evidencia es baja debido a imprecisión muy seria. La incidencia de eventos adversos serios, entre adolescentes de 12 a 17 años que recibieron la vacuna mRNA-1273 fue similar a lo reportado por el grupo placebo (Incidencia de 0.1% versus 0.1%, RR: 1.00 (IC 95%: 0.09 a 10.99) (1 ensayo clínico, 3276 participantes). Ninguno de estos eventos estuvo relacionado con la intervención recibida. La certeza de la evidencia es baja dado debido a imprecisión muy seria. El mayor número de casos de miocarditis reportados en las series fue de 397 y ocurrieron con mayor frecuencia en el sexo masculino y luego de la 2o dosis de la vacuna BNT162b2. El tiempo de inicio de síntomas fue de 2 días, rango de 1 a 7 días, luego de la 2o dosis. En su mayoría, los casos se caracterizaron por dolor torácico, elevación de troponinas, elevación del segmento ST e imágenes compatibles con miocarditis en la resonancia magnética cardiaca. El tiempo de hospitalización fue de 2 a 5 días (mediana). No se reportaron muertes durante la hospitalización y ninguno de los casos requirió soporte hemodinámico o respiratorio avanzado. No se cuenta con información suficiente respecto del seguimiento al alta que permita establecer su pronóstico a largo plazo. La tasa de ocurrencia de miocarditis en población adolescentes de Estados Unidos, a partir de los reportes disponibles en un sistema de notificación de reacciones adversas, estimada por CDC de Estados Unidos y autores independientes, osciló entre 43 a 162 y 72 a 94 casos por millón de segundas dosis administradas en adolescentes varones de 12 a 15 años y 16 a 17 años respectivamente. En mujeres, las tasas observadas fueron de 4 a 13 en el grupo de 12 a 15 años y de 0 a 8 en aquellas con 16 a 17 años. La certeza de la evidencia fue muy baja debido al diseño de estudio y riesgo de sesgo serio.


Subject(s)
Humans , RNA, Messenger/immunology , COVID-19 Vaccines/supply & distribution , SARS-CoV-2/immunology , COVID-19/prevention & control , Efficacy , Cost-Benefit Analysis
4.
Braz. j. med. biol. res ; 54(10): e11439, 2021. tab, graf
Article in English | LILACS | ID: biblio-1285649

ABSTRACT

Cathepsin Z (CTSZ) is a cysteine protease responsible for the adhesion and migration of both immune and tumor cells. Due to its dual role, we hypothesized that the site of CTSZ expression could be determinant of the pro- or anti-tumorigenic effects of this enzyme. To test this hypothesis, we analyzed CTSZ expression data in healthy and tumor tissues by bioinformatics and evaluated the expression levels of CTSZ mRNA in the blood cells of prostate cancer (PCa) patients by qRT-PCR compared with healthy subjects, evaluating its diagnostic and prognostic implications for this type of cancer. Immune cells present in the blood of healthy patients overexpress CTSZ. In PCa, we found decreased CTSZ mRNA levels in blood cells, 75% lower than in healthy subjects, that diminished even more during biochemical relapse. CTSZ mRNA in the blood cells had an area under the curve for PCa diagnosis of 0.832, with a 93.3% specificity, and a positive likelihood ratio of 9.4. The site of CTSZ mRNA expression is fundamental to determine its final role as a protective determinant in PCa, such as CTSZ mRNA in the blood cells, or a malignant determinant, such as found for CTSZ expressed in high levels by different types of primary and metastatic tumors. Low CTSZ mRNA expression in the total blood is a possible PCa marker complementary to prostate-specific antigen (PSA) for biopsy decisions, with the potential to eliminate unnecessary biopsies.


Subject(s)
Humans , Male , Prostatic Neoplasms/diagnosis , Cathepsin Z , Prognosis , Blood Cells , RNA, Messenger , Prostate-Specific Antigen
5.
Braz. j. med. biol. res ; 54(11): e11592, 2021. tab, graf
Article in English | LILACS | ID: biblio-1339449

ABSTRACT

Cervical cancer (CC) patients have a poor prognosis due to the high recurrence rate. However, there are still no effective molecular signatures to predict the recurrence and survival rates for CC patients. Here, we aimed to identify a novel signature based on three types of RNAs [messenger RNA (mRNAs), microRNA (miRNAs), and long non-coding RNAs (lncRNAs)]. A total of 763 differentially expressed mRNAs (DEMs), 46 lncRNAs (DELs), and 22 miRNAs (DEMis) were identified between recurrent and non-recurrent CC patients using the datasets collected from the Gene Expression Omnibus (GSE44001; training) and The Cancer Genome Atlas (RNA- and miRNA-sequencing; testing) databases. A competing endogenous RNA network was constructed based on 23 DELs, 15 DEMis, and 426 DEMs, in which 15 DELs, 13 DEMis, and 390 DEMs were significantly associated with disease-free survival (DFS). A prognostic signature, containing two DELs (CD27-AS1, LINC00683), three DEMis (hsa-miR-146b, hsa-miR-1238, hsa-miR-4648), and seven DEMs (ARMC7, ATRX, FBLN5, GHR, MYLIP, OXCT1, RAB39A), was developed after LASSO analysis. The built risk score could effectively separate the recurrence rate and DFS of patients in the high- and low-risk groups. The accuracy of this risk score model for DFS prediction was better than that of the FIGO (International Federation of Gynecology and Obstetrics) staging (the area under receiver operating characteristic curve: training, 0.954 vs 0.501; testing, 0.882 vs 0.656; and C-index: training, 0.855 vs 0.539; testing, 0.711 vs 0.508). In conclusion, the high predictive accuracy of our signature for DFS indicated its potential clinical application value for CC patients.


Subject(s)
Humans , Female , Uterine Cervical Neoplasms/genetics , MicroRNAs/genetics , RNA, Long Noncoding/genetics , RNA, Messenger , Gene Expression Regulation, Neoplastic , Disease-Free Survival , rab GTP-Binding Proteins , Ubiquitin-Protein Ligases , Neoplasm Recurrence, Local/genetics
6.
Clinics ; 76: e2846, 2021. tab, graf
Article in English | LILACS | ID: biblio-1278914

ABSTRACT

Breast cancer is the most frequently diagnosed malignant neoplasm in women and is considered a multifactorial disease of unknown etiology. One of the major risk factors is genetic alteration. Changes in CYP19A1 gene expression levels have been associated with increased risk and increased aggressiveness of breast cancer. Increased CYP19A1 gene expression and/or aromatase activity are among the major regulatory events for intratumoral production of estrogens in breast malignant tissues. This systematic review aimed to investigate the influence of CYP19A1 gene expression levels in women with breast cancer. The research was carried out using the PubMed, Scopus, and Web of Science databases. Searches were conducted between February 2 and May 15, 2019. Inclusion criteria were studies published between 2009 and 2019, English language publications, and human studies addressing the gene expression of CYP19A1 in breast cancer. A total of 6.068 studies were identified through PubMed (n=773), Scopus (n=2,927), and the Web of Science (n=2,368). After selecting and applying the inclusion and exclusion criteria, six articles were included in this systematic review. This systematic review provides evidence that increased or decreased levels of CYP19A1 gene expression may be related to pathological clinical factors of disease, MFS, OS, DFS, WATi, markers of metabolic function, concentrations of E1, FSH, and in the use of multiple exons 1 of the CYP19A1 gene in breast cancer.


Subject(s)
Humans , Female , Breast Neoplasms/genetics , RNA, Messenger , Aromatase/genetics , Gene Expression , Estrogens
7.
Article in Chinese | WPRIM | ID: wpr-887900

ABSTRACT

Objective To study the expression and significance of leucine-rich repeat-containing G-protein coupled receptor(LGR)5/6 in childhood acute lymphoblastic leukemia(ALL). Methods A total of 39 children who had ALL and achieved complete remission on day 33 after induction therapy were enrolled.The children before induction therapy were considered as the incipient group,and those who achieved complete remission on day 33 by induction therapy were considered as the remission group.According to the degree of risk,they were assigned into 3 groups:low-risk(


Subject(s)
Child , Humans , Leucine , Precursor Cell Lymphoblastic Leukemia-Lymphoma , RNA, Messenger/genetics , Receptors, G-Protein-Coupled/genetics , Wnt Signaling Pathway
8.
Acta Physiologica Sinica ; (6): 208-216, 2021.
Article in Chinese | WPRIM | ID: wpr-878249

ABSTRACT

The transcription factor X-box binding protein-1 (XBP1) plays a key role in unfolded protein reaction. This study was aimed to investigate the expression pattern and regulation of XBP1 in the mouse uterus during early pregnancy. The methods of immunohistochemistry (IHC) and real time quantitative RT-PCR were used to test XBP1 expression in early pregnancy, artificial decidualization, oestrous cycle and hormone-regulated mouse models. The results showed that XBP1 was spatiotemporally expressed in mouse uterus during early pregnancy. The XBP1 protein was mainly detected in the luminal and glandular epithelia on days 1-4 of pregnancy, and was strongly detected in the decidual area on days 5-8 of pregnancy. Similarly, XBP1 expression was also mainly expressed in decidual cells following artificial decidualization. During the oestrous cycle, Xbp1, Xbp1u, and Xbp1s mRNA was predominantly present in proestrus. In the ovariectomized uterus, the expression of XBP1 in luminal and glandular epithelia was up-regulated after estrogen treatment. These results suggest that XBP1 is associated with embryo implantation and decidualization during early pregnancy in mice, and the expression of XBP1 in luminal and glandular epithelia may be regulated by estrogen.


Subject(s)
Animals , Decidua , Embryo Implantation , Estrogens , Female , Mice , Pregnancy , RNA, Messenger/genetics , Uterus
9.
Journal of Experimental Hematology ; (6): 1570-1576, 2021.
Article in Chinese | WPRIM | ID: wpr-922297

ABSTRACT

OBJECTIVE@#To investigate the expressions of microRNAs in peripheral blood of patients with primary immune thrombocytopenia(ITP) and its correlation with the imbalance of Th1/Th2 cells.@*METHODS@#Thirty patients with ITP (ITP group) and 15 healthy people (control group) were enrolled.Real-time polymerase chain reaction (RT-PCR) was used to detect the expressions of six miRNAs (miR-107,miR-205-5p,miR-138-5p,miR-326,miR-1827,miR-185-5p) and Th1-specific transcription factor T-bet mRNA and Th2-specific transcription factor GATA-3 mRNA in the peripheral blood of the two groups. Th1 and Th2 cells were detected by flow cytometry. The expressions of Th1-cytokines TNF-α and IFN-γ and Th2-cytokines IL-4 and IL-10 were detected by AimPlex multiple immunoassays for Flow. The expression difference of miRNAs, mRNA, Th1, Th2 cells and cytokines of the two groups were compared, and the correlations of miRNAs to mRNA, Th1, Th2 cells and cytokines were analyzed in ITP group.@*RESULTS@#The expressions of miRNAs(miR-107, miR-205-5p, miR-138-5p, miR-326, miR-1827, miR-185-5p)and Th2-specific transcription factor GATA-3 mRNA of the patients in ITP group were significantly decreased (P<0.05) as compared with those in control, while the expressions of Th1 cells and Th1-specific transcription factor T-bet mRNA and Th1-cytokines TNF-α were significantly increased (P<0.05), also for the ratios of T-bet mRNA/GATA-3 mRNA and Th1/Th2 cells were significantly increased (P<0.05). The relative expressions of miR-107, miR-205-5p, miR-138-5p in ITP patients were negatively correlated with Th2 cells (r=-0.411, r=-0.593, r=-0.403,P<0.05) and the relative expression of miR-1827 was negatively correlated with TNF-α (r=-0.390).@*CONCLUSION@#The relative expressions of the six miRNAs in peripheral blood of patients with ITP are significantly decreased, which result in the increasing ratio of T-bet mRNA/GATA-3 mRNA, then lead to the imbalance of Th1/Th2.


Subject(s)
Humans , MicroRNAs , Purpura, Thrombocytopenic, Idiopathic , RNA, Messenger , Th1 Cells , Th2 Cells
10.
Journal of Experimental Hematology ; (6): 1456-1461, 2021.
Article in Chinese | WPRIM | ID: wpr-922279

ABSTRACT

OBJECTIVE@#To investigate the effect of β-arrestin1 on the concentration of reactive oxygen species (ROS) in the mitochondria of acute T-lymphocytic leukemia (T-ALL) cells and its possible mechanisms.@*METHODS@#The stable T-ALL cell line with knocked down β-arrestin1 (Jurkat Siβ1) was constructed. Flow cytometry and probe assays were used to detect ROS content in cell and mitochondrial, respectively. The relationship between β-arrestin1 and microRNA was detected, analyzed and Q-PCR confirmed by microRNA microarray. The target genes of microRNA were predicated by miRbase software, identified by Western blot, and validated by Dual luciferase reporter gene.@*RESULTS@#Jurkat Siβ1 stable cell line was successfully constructed and it was found that ROS content was slightly reduced in Jurkat Siβ1 at the whole cell level, and the ROS content was also significantly reduced in mitochondria. MicroRNA microarray analysis revealed that multiple T-ALL related microRNAs showed differentially expressed, in which the expression of miR-652-5p was significantly increased in Jurkat Siβ1 (P2.0), and Q-PCR showed that miR-652-5p was nearly 5-fold up-regulated in Jurkat Siβ1. miRbase predicted that the P62 gene was the target gene of miR-652-5p which could regulates mitochondrial function. P62 protein showed highly expressed in stably knocked down miR-652-5p in Jurkat cells. Dual luciferase reporter gene assay confirms that P62 was the target gene of miR-652-5p.@*CONCLUSION@#β-arrestin1 can decreases the expression of miR-652-5p and deregulates the translational inhibition of P62 mRNA, thus to increase ROS content in mitochondria of T-ALL cells.


Subject(s)
Humans , MicroRNAs/genetics , Mitochondria , Oxygen , Precursor T-Cell Lymphoblastic Leukemia-Lymphoma , RNA, Messenger , beta-Arrestin 1
11.
Journal of Experimental Hematology ; (6): 1424-1428, 2021.
Article in Chinese | WPRIM | ID: wpr-922275

ABSTRACT

OBJECTIVE@#To investigate the relationship between hypoxia inducible factor 1 (HIF1α) and Wilms' tumor 1associating protein (WTAP) expression level in t(8;21) acute myeloid leukemia cells.@*METHODS@#The t(8;21) acute myeloid leukemia cell lines, including SKNO-1 and Kasumi-1 were treated by Echinomycin for 24 h, RT-qPCR and Western blot were used to detect the expression levels of WTAP mRNA and the protein. The CoCl @*RESULTS@#The expression level of WTAP mRNA and the protein in the echinomycin treated group was significantly lower than those in the control group (P<0.01). The expression level of WTAP protein in the CoCl@*CONCLUSION@#The inhibition of HIF1-α could down-regulates the expression of WTAP, while the up-regulation of HIF1α could up-regulates the expression of WTAP, which shows that there is a positive correlation of HIF1α and WTAP expression. This result suggesting that HIF1α may be involves in the expression regulation of WTAP gene.


Subject(s)
Cell Cycle Proteins , Humans , Hypoxia-Inducible Factor 1, alpha Subunit , Leukemia, Myeloid, Acute/genetics , Nuclear Proteins , RNA Splicing Factors , RNA, Messenger
12.
Article in English | WPRIM | ID: wpr-922197

ABSTRACT

BACKGROUND@#Exposure to the ionizing radiation (IR) encountered outside the magnetic field of the Earth poses a persistent threat to the reproductive functions of astronauts. The potential effects of space IR on the circadian rhythms of male reproductive functions have not been well characterized so far.@*METHODS@#Here, we investigated the circadian effects of IR exposure (3 Gy X-rays) on reproductive functional markers in mouse testicular tissue and epididymis at regular intervals over a 24-h day. For each animal, epididymis was tested for sperm motility, and the testis tissue was used for daily sperm production (DSP), testosterone levels, and activities of testicular enzymes (glucose-6-phosphate dehydrogenase (G6PDH), sorbitol dehydrogenase (SDH), lactic dehydrogenase (LDH), and acid phosphatase (ACP)), and the clock genes mRNA expression such as Clock, Bmal1, Ror-α, Ror-β, or Ror-γ.@*RESULTS@#Mice exposed to IR exhibited a disruption in circadian rhythms of reproductive markers, as indicated by decreased sperm motility, increased daily sperm production (DSP), and reduced activities of testis enzymes such as G6PDH, SDH, LDH, and ACP. Moreover, IR exposure also decreased mRNA expression of five clock genes (Clock, Bmal1, Ror-α, Ror-β, or Ror-γ) in testis, with alteration in the rhythm parameters.@*CONCLUSION@#These findings suggested potential health effects of IR exposure on reproductive functions of male astronauts, in terms of both the daily overall level as well as the circadian rhythmicity.


Subject(s)
ARNTL Transcription Factors/genetics , Acid Phosphatase , Animals , CLOCK Proteins/genetics , Circadian Rhythm/radiation effects , Epididymis/radiation effects , Gene Expression/radiation effects , Genitalia, Male/radiation effects , Glucosephosphate Dehydrogenase , L-Iditol 2-Dehydrogenase , L-Lactate Dehydrogenase , Male , Mice , Mice, Inbred C57BL , Models, Animal , Nuclear Receptor Subfamily 1, Group F, Member 1/genetics , Nuclear Receptor Subfamily 1, Group F, Member 2/genetics , Nuclear Receptor Subfamily 1, Group F, Member 3/genetics , RNA, Messenger/genetics , Radiation Exposure , Radiation, Ionizing , Reproductive Physiological Phenomena/radiation effects , Sperm Motility/radiation effects , Spermatozoa/radiation effects , Testis/radiation effects
13.
National Journal of Andrology ; (12): 771-779, 2021.
Article in Chinese | WPRIM | ID: wpr-922156

ABSTRACT

Objective@#To screen differentially expressed miRNAs in the testis of male rats exposed to cigarette smoke (CS) and identify the early molecular markers of CS-induced apoptosis of testicular cells.@*METHODS@#We randomly divided 200 SPF male SD rats into blank control and low-dose (10 non-filter cigarettes/d), medium-dose (20 non-filter cigarettes/d) and high-dose (30 non-filter cigarettes/d) CS exposure groups. After 2, 4, 6, 8 and 12 weeks of CS exposure, we observed the histopathological changes of the testis by HE staining, detected the apoptosis of the testicular cells by TUNEL, and determined the expressions of caspase-3 and caspase-9 in the testis tissue by immunohistochemistry, RT-PCR and Western blot. Based on the laboratory results, we selected 4 testicular samples from the 12-week high-dose group and another 4 from the control for miRNA microarray-based screening, bioinformatics analysis, and verification of differentially expressed miRNAs in all the animals by RT-PCR.@*RESULTS@#Compared with the controls, the CS-exposed rats showed dose- and time-dependent increase in the atrophy of the testis and significantly increased number of apoptotic testis cells from the 6th week of exposure (P < 0.05), with dramatically up-regulated expressions of caspase-3 (P < 0.01) and caspase-9 protein and mRNA (P < 0.05) in the testis tissue. Microarray-based screening and RT-PCR revealed 5 differentially expressed miRNAs in the testis of the CS-exposed rats, of which miR-138-5p, miR-181d-5p, miR-19a-3p and miR-3588 were down-regulated, and miR-155-5p up-regulated, and the target genes of the differentially expressed miRNAs positively regulated the apoptosis of the testicular cells.@*CONCLUSIONS@#The differentially expressed miRNAs miR-155-5p, miR-138-5p, miR-181d-5p, miR-19a-3p and miR-3588 regulate CS-induced apoptosis of testicular cells, and may become biomarkers for early diagnosis and prognosis of CS-induced spermatogenesis obstruction.《.


Subject(s)
Animals , Male , MicroRNAs/genetics , RNA, Messenger , Rats , Rats, Sprague-Dawley , Smoking , Testis
14.
Chinese Medical Journal ; (24): 2475-2482, 2021.
Article in English | WPRIM | ID: wpr-921116

ABSTRACT

BACKGROUND@#There is growing evidence that 5-fluorouracil (5-FU) combined with therapeutic trauma can effectively induce skin repigmentation in vitiligo patients who are unresponsive to conventional treatments. Previous studies have mainly focused on identifying the antimitotic activity of 5-FU for the treatment of skin cancer, but few studies have investigated its extra-genotoxic actions favoring melanocyte recruitment.@*METHODS@#We utilized the full thickness excisional skin wound model in Dct-LacZ transgenic mice to dynamically assess the migration of melanocytes in the margins of wounds treated with or without 5-FU. The in-situ expression of CXCL12 was examined in the wound beds using immunofluorescence staining. Quantitative real-time polymerase chain reaction and Western blotting analyses were performed to detect the expression levels of CXCL12 mRNA and protein in primary mouse dermal fibroblasts treated with or without 5-FU. Transwell assays and fluorescein isothiocyanate (FITC)-phalloidin staining were used to observe cell migration and filamentous actin (F-actin) changes of melan-a murine melanocytes.@*RESULTS@#Whole mount and cryosection X-gal staining showed that the cell numbers of LacZ-positive melanocytes were much higher in the margins of dorsal and tail skin wounds treated with 5-FU compared with the controls. Meanwhile, CXCL12 immunostaining was significantly increased in the dermal compartment of wounds treated with 5-FU (control vs. 5-FU, 22.47 ± 8.85 vs. 44.69 ± 5.97, P < 0.05). Moreover, 5-FU significantly upregulated the expression levels of CXCL12 mRNA (control vs. 5-FU, 1.00 ± 0.08 vs. 1.54 ± 0.06, P < 0.05) and protein (control vs. 5-FU, 1.00 ± 0.06 vs. 2.93 ± 0.10, P < 0.05) in cultured fibroblasts. Inhibition of the CXCL12/CXCR4 axis suppressed melanocyte migration in vitro using a CXCL12 small interfering RNA (siRNA) or a CXCR4 antagonist (AMD3100).@*CONCLUSION@#5-FU possesses a pro-pigmentary activity through activation of the CXCL12/CXCR4 axis to drive the chemotactic migration of melanocytes.


Subject(s)
Animals , Cell Movement , Cell Proliferation , Chemokine CXCL12/genetics , Fibroblasts , Fluorouracil/therapeutic use , Humans , Mice , RNA, Messenger , Receptors, CXCR4
15.
Article in English | WPRIM | ID: wpr-921085

ABSTRACT

INTRODUCTION@#The use of novel mRNA platforms for COVID-19 vaccines raised concern about vaccine safety, especially in Asian populations that made up less than 10% of study populations in the pivotal vaccine trials used for emergency use authorisation. Vaccine safety issues also remain a concern in assessing the clinical risks and benefits of vaccine boosters, particularly in specific age groups or segments of the population. This study describes a vaccination exercise involving Asian military personnel, and the adverse reactions and safety events observed.@*METHODS@#Minor adverse reactions, hospitalisations and adverse events of special interest were monitored as part of the organisation's protocol for safety monitoring of COVID-19 vaccinations. All vaccine recipients were invited to complete an online adverse reaction questionnaire. Medical consults at the military's primary healthcare facilities were monitored for vaccine-related presentations. All hospitalisations involving vaccine recipients were analysed. Adverse reaction rates between doses, vaccines and age groups were compared.@*RESULTS@#A total of 127,081 mRNA vaccine doses were administered to 64,661 individuals up to 24 July 2021. Common minor adverse reactions included fever/chills, body aches and injection site pain. These were more common after dose 2. Younger individuals experienced minor adverse reactions more frequently. Rare cases of anaphylaxis, Bell's palsy and myocarditis/pericarditis were observed. No deaths occurred.@*CONCLUSION@#Minor adverse reactions were less common than reported in other studies, and rates of anaphylaxis, Bell's palsy and myocarditis/pericarditis were comparable. Our study supports the favourable safety profile of mRNA COVID-19 vaccines, which may help guide decisions about booster doses if required.


Subject(s)
COVID-19 , COVID-19 Vaccines , Humans , Military Personnel , RNA, Messenger , SARS-CoV-2 , Vaccines, Synthetic
16.
Article in Chinese | WPRIM | ID: wpr-880136

ABSTRACT

OBJECTIVE@#To investigate the regulatory effects of RBM47 on HMGA2 and the function of RBM47 in human chronic myeloid leukemia cell K562.@*METHODS@#K562 cells were transduction by the overexpressed and knockdown RBM47 lentiviral vector. CCK-8 assay was used to detect the effect of RBM47 on the proliferation of K562 cells. Flow cytometry assay was used to detect the effect of RBM47 on the cell cycle progression of K562 cells. RNA immunoprecipitation assay was used to detect the association between RBM47 and HMGA2 mRNA. RT-qPCR was used to detect the effects of RBM47 on the stability of HMGA2 mRNA. Western blot was used to evaluate the effect of RBM47 on HMGA2 protein expression.@*RESULTS@#The overexpressed RBM47 could inhibit the proliferation and cell cycle progression of K562 cells. However, the inhibitation of RBM47 could improve the proliferation and cell cycle progression of K562 cells. RBM47 combined with HMGA2 mRNA could promote the degradation of HMGA2 mRNA. Thus, the overexpressed RBM47 could decrease the expression of HMGA2 protein in K562 cells.@*CONCLUSION@#RNA binding protein RBM47 can inhibit the proliferation of K562 cells by regulating HMGA2 expression.


Subject(s)
Apoptosis , Cell Proliferation , HMGA2 Protein/genetics , Humans , K562 Cells , RNA, Messenger/genetics , RNA-Binding Proteins/genetics
17.
Article in Chinese | WPRIM | ID: wpr-880059

ABSTRACT

OBJECTIVE@#To investigate the molecular mechanism in stable cell strains expressing Mini-hF9 gene with nonsense mutation.@*METHODS@#Mini-hF9 gene and its nonsense mutants were transfected into HeLa cells independently, and stable cell strains were obtained after G418 resistance screening and monoclonal transformation. The altered splicing and protein expression of mRNA in Mini-hF9 gene in stable cell strains were detected by using RT-PCR and Western blot.@*RESULTS@#The wild type and nonsense mutated human coagulation factor IX stable cell strains were constructed successfully, which were named HeLa-F9-WT, HeLa-F9-M1 and HeLa-F9-M2. Only normal splicing Norm was detected in the wild-type cell strain HeLa-F9-WT; Norm and Alt-S1 splicing were detected in HeLa-F9-M1; while Norm, Alt-S1 and Alt-S2 splicing were detected in HeLa-F9-M2.@*CONCLUSION@#The nonsense associated altered splicing (NAS) pathway, which generated alternately spliced transcripts, might be triggered in coagulation factor IX gene with nonsense mutation.


Subject(s)
Codon, Nonsense , Factor IX/metabolism , HeLa Cells , Humans , Mutation , RNA Splicing , RNA, Messenger/metabolism
18.
Article in Chinese | WPRIM | ID: wpr-878730

ABSTRACT

In eukaryote cells,transcription from genome DNA is a key process of gene expression.The transcription products contain not only messenger RNAs that code proteins,but also various types of non-coding RNAs.During transcription,some of the gene loci produce more than one kind of RNA molecule,including coding RNAs and more often non-coding RNAs.These gene loci that generate several kinds of RNA molecules are named supergenes.According to the transcription pattern,supergenes are divided into three types,known as types Ⅰ,Ⅱ and Ⅲ.In this review,we summarize the transcription pattern of each type of supergene,and exposit the role of these genes in cells.


Subject(s)
Gene Expression , RNA, Messenger
19.
Article in Chinese | WPRIM | ID: wpr-880825

ABSTRACT

OBJECTIVE@#To study the changes in mRNA and long non-coding RNA (lncRNA) expression profiles in a mouse model of bleomycin-induced lung fibrosis and identify lung fibrosis-related mRNA for coding-noncoding coexpression (CNC) bioinformatics analysis of the differential lncRNAs.@*METHODS@#Lung fibrosis was induced by intratracheal injection of bleomycin in 10 C57BL/6 mice and another 10 mice with intratracheal injection of saline served as the control group. Lung tissues were harvested from the mice at 14 days after the injections and lung fibrosis was assessed using Masson and HE staining. LncRNA chip technology was used to screen the differentially expressed mRNAs and lncRNAs in mice with lung fibrosis, and GO and KEGG pathway analyses of the differential mRNAs were performed using NCBI database and UCSC database to identify possible fibrosis-related mRNAs, which were validated by qRT-PCR to construct a coding and non-coding co- expression network with the differential lncRNAs.@*RESULTS@#Compared with the control mice, the mice with intratracheal injection of bleomycin showed obvious lung fibrosis. The results of gene chip analysis showed that 127 mRNAs were upregulated and 184 mRNAs were down-regulated in the model group as compared with the control group. GO and pathway analysis suggested that the differentially expressed genes participated mainly in immune response, cell differentiation, and cytoskeletons; the involved signal pathways were associated mainly with cytokine and cytokine receptor interaction and chemokine signal transduction. Bioinformatics analysis identified a significant coexpression network between the fibrosisrelated mRNA and the differentially expressed lncRNA.@*CONCLUSIONS@#In mice with lung fibrosis, the differential expressions of fibrosis-related mRNAs in the lung tissues are closely correlated with the co- expressions of a large number of differential lncRNAs, which points to a new direction for investigation of the pathogenesis of pulmonary fibrosis.


Subject(s)
Animals , Bleomycin/toxicity , Gene Expression Profiling , Gene Regulatory Networks , Mice , Mice, Inbred C57BL , Pulmonary Fibrosis/genetics , RNA, Long Noncoding/genetics , RNA, Messenger/genetics
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