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1.
Article in English | WPRIM | ID: wpr-878339

ABSTRACT

Objective@#Cervical cancer (CC) is one of the most common malignant tumors in gynecology. This study aimed to investigate the prognostic significance of serum microRNA (miR)-378a-3p in CC and the effect of miR-378a-3p on tumor growth.@*Methods@#Real-time quantitative polymerase chain reaction analysis was used to measure the expression of miR-378a-3p in serum from patients with CC and healthy control subjects as well as from CC tissues and adjacent normal tissues. The association between serum miR-378a-3p levels and clinicopathological factors was analyzed. The correlation between miR-378a-3p levels and overall survival (OS) of CC patients was determined by Kaplan-Meier analysis. The CC cell proliferation and migration abilities after transfection of miR-378a-3p mimics were detected by Cell Counting Kit-8 and scratch wound healing assays, respectively. Tumor volume and weight in mice treated with miR-378a-3p were measured using a caliper and an electronic balance.@*Results@#MiR-378a-3p expression was downregulated in the serum and tissues of CC patients compared to that in healthy control subjects and normal tissues, respectively. Low expression of miR-378a-3p was positively correlated with large tumor size, advanced tumor stage, and lymph node metastasis. The OS of patients with low expression of miR-378a-3p was significantly lower than that of patients with high expression. Overexpression of miR-378a-3p suppressed the proliferation and migration of CC cells. @*Conclusion@#MiR-378a-3p downregulation is associated with the development and prognosis of CC, suggesting that it may be a potential biomarker for CC.


Subject(s)
Animals , Biomarkers/blood , Cell Movement , Cell Proliferation , Down-Regulation , Female , Gene Expression Regulation, Neoplastic , Humans , Mice , Mice, Inbred BALB C , MicroRNAs/blood , Middle Aged , Uterine Cervical Neoplasms/metabolism
2.
Article in English | WPRIM | ID: wpr-878317

ABSTRACT

Objective@#In the present study, the ABCA1 was used as a label to capture specific exosomes, the level of ABCA1-labeled exosomal microRNA-135a (miR-135a) was evaluated for the diagnosis of Alzheimer's disease (AD), especially in patients with early stages of AD.@*Methods@#This is a preliminary research focused on the levels of ABCA1 in WBCs, RBCs, HT-22 cells, and neuron cells. The diagnostic value of ABCA1-labeled exosomal miR-135a was examined using the CSF and serum of APP/PS1 double transgenic mice, and 152 patients with SCD, 131 patients with MCI, 198 patients with DAT, and 30 control subjects.@*Results@#The level of ABCA1 exosomes harvested from HT-22 cells and neuron culture medium was significantly higher compared to that of RBCs and WBCs ( @*Conclusion@#This study outlines a method to capture specific exosomes and detect them using immunological methods, which is more efficient for early diagnosis of AD.


Subject(s)
ATP Binding Cassette Transporter 1/cerebrospinal fluid , Aged , Aged, 80 and over , Alzheimer Disease/cerebrospinal fluid , Animals , Biomarkers/cerebrospinal fluid , Cell Line , Cognitive Dysfunction/cerebrospinal fluid , Erythrocytes/metabolism , Exosomes , Female , Humans , Leukocytes/metabolism , Male , Mice, Transgenic , MicroRNAs/blood , Neurons/metabolism
3.
Rev. Assoc. Med. Bras. (1992) ; 66(6): 732-736, June 2020. tab, graf
Article in English | SES-SP, LILACS, SES-SP | ID: biblio-1136278

ABSTRACT

SUMMARY OBJECTIVE A previous study has reported that miR-1204 exerted oncogenic effects in breast cancer (BC). The purpose of our paper was to evaluate the expressions of tissue and serum miR-1204 in patients with BC and further investigate its biomarker potential. METHODS The expressions of tissue and serum miR-1204 were investigated by qRT-PCR in 144 BC patients and 38 healthy controls. Chi-square tests were conducted to examine the associations between miR-1204 expressions and clinicopathological factors. Then, the associations of miR-1204s level with the survival of BC patients were determined by performing the Kaplan-Meier and multivariate analysis. The receiver operating characteristics (ROC) and area under the OC curve (AUC) were obtained to validate the diagnostic values of miR-1204. RESULTS We found that the expressions of miR-1204 were increased in both tissue and serum samples from BC patients. Multivariate assays identified tissue and serum miR-1204 overexpression as an independent poor prognostic factor. In addition, ROC curve assays indicated that tissue and serum miR-1204 are potential diagnostic markers of BC. CONCLUSIONS Detection of tissue and serum miR-1204 levels could have clinical potential as a novel prognostic/diagnostic biomarker for BC patients.


RESUMO OBJETIVO Um estudo anterior indicou que o miR-1204 exerce efeitos oncogênicos no Câncer de Mama (CM). O objetivo deste trabalho foi avaliar as expressões de miR-1204 sérico e em tecidos em pacientes com CM e investigar o seu potencial biomarcador. METODOLOGIA As expressões de miR-1204 sérico e em tecidos foram investigadas por qRT-PCR em 144 pacientes com CM e 38 controles saudáveis. Testes qui-quadrados foram realizados para examinar as associações entre as expressões de miR-1204 e os fatores clinicopatológicos. Em seguida, as associações entre nível de miR-1204s e sobrevida de pacientes de CM foram determinadas através de análises de Kaplan-Meier e multivariadas. A Curva Característica de Operação do Receptor (ROC) e área sob a curva (AUC) foram obtidas para validar o valor diagnóstico do MIR-1204. RESULTADOS Descobrimos que as expressões do MIR-1204 estavam aumentadas em amostras de tecido e séricas de pacientes com CM. Análises multivariadas identificaram a superexpressão de miR-1204 sérico e em tecidos como um fator independente de prognóstico ruim. Além disso, as curvas ROC indicaram que o miR-1204 sérico e em tecidos é um possível marcador de diagnóstico de CM. CONCLUSÃO A detecção dos níveis MIR-1204 em tecidos e séricos pode ter potencial clínico como um novo biomarcador de prognóstico/diagnóstico para pacientes de CM.


Subject(s)
Humans , Breast Neoplasms/diagnosis , Biomarkers, Tumor , MicroRNAs/blood , Prognosis , Breast Neoplasms/blood , ROC Curve , Area Under Curve , Kaplan-Meier Estimate
4.
Rev. salud pública Parag ; 10(1): [P74-P79], mar. 2020.
Article in Spanish | LILACS, BDNPAR | ID: biblio-1087935

ABSTRACT

Las enfermedades cardiovasculares constituyen la principal causa de mortalidad y morbilidad en el mundo actualmente, lo que obliga a la realización de los continuos avances en las estrategias diagnóstico precoz y tratamiento con el fin de mejorar el pronóstico y disminuir la mortalidad. Sin duda esto abre las puertas al campo de la investigación y en los últimos años aparecen los llamados biomarcadores séricos y entre ellos los microARN (miARN) que juegan un papel fundamental tanto en el desarrollo y como en la regulación del sistema cardiovascular. Los microARN tienen un tamaño de 19-25 nucleótidos, son el grupo de ARN de pequeño tamaño que ha atraído mayor atención durante los últimos años. Hasta la fecha, se han identificado aproximadamente unos 2500 miARN en el genoma humano. Los miARN desempeñan un papel en la regulación de diversos procesos biológicos, como la embriogénesis, la proliferación y diferenciación celular, la apoptosis o la tumorogénesis. En el sistema cardiovascular, los miARN controlan el crecimiento y la contractilidad de los cardiomiocitos, el desarrollo y mantenimiento del ritmo cardíaco, la formación de la placa arterioesclerótica, el metabolismo de los lípidos y la angiogénesis. Además están vinculados en la fisiopatología de varias enfermedades cardiovasculares, fundamentalmente la insuficiencia cardiaca, el infarto de miocardio, la enfermedad coronaria, la ateroesclerosis, y las cardiomiopatías de diversas etiologías, de allí que su determinación en la circulación podría ser de utilidad en la práctica clínica como potencial biomarcador diagnóstico y pronóstico de las enfermedades cardiovasculares. Palabras clave: Micro RNA; Enfermedades cardiovasculares; Biomarcadores séricos.


Cardiovascular diseases are the main cause of mortality and morbidity in the world today, which forces the continuous progress in early diagnosis and treatment strategies in order to improve the prognosis and decrease mortality. Undoubtedly this opens the doors to the field of research and in recent years there are the so-called serum biomarkers and among them microRNAs (miRNAs) that play a fundamental role both in the development and in the regulation of the cardiovascular system. The microRNAs are 19 to 25 nucleotides in size, they are the small group of RNA that has attracted the most attention in recent years. To date, approximately 2,500 miRNAs have been identified in the human genome. The miRNAs play a role in the regulation of various biological processes, such as embryogenesis, cell proliferation and differentiation, apoptosis or oncogenesis. In the cardiovascular system, miRNAs control the growth and contractility of cardiomyocytes, the development and maintenance of heart rhythm, the formation of atherosclerotic plaque, lipid metabolism and angiogenesis. They are also linked in the pathophysiology of several cardiovascular diseases, mainly heart failure, myocardial infarction, coronary heart disease, atherosclerosis, and cardiomyopathies of various etiologies, hence their determination in circulation could be useful in clinical practice as a potential biomarker in the diagnosis and prognosis of cardiovascular diseases. Keywords: Micro RNA; Cardiovascular diseases; Serum biomarkers.


Subject(s)
Humans , Cardiovascular Diseases/blood , MicroRNAs/blood , Biomarkers , Cardiovascular Diseases/diagnosis
5.
Arq. neuropsiquiatr ; 77(10): 689-695, Oct. 2019. graf
Article in English | LILACS | ID: biblio-1038728

ABSTRACT

ABSTRACT This study aimed to analyze the cerebellum of rats submitted to an experimental focal cerebral ischemia, by middle cerebral artery occlusion for 90 minutes, followed by reperfusion for 48 hours, associated with an alcoholism model. Methods Fifty adult Wistar rats were used, subdivided into five experimental groups: control group (C): animals submitted to anesthesia only; sham group (S): animals submitted to complete simulation of the surgical procedure; ischemic group (I): animals submitted to focal cerebral ischemia for 90 minutes followed by reperfusion for 48 hours; alcoholic group (A): animals that received daily absolute ethanol diluted 20% in water for four weeks; and, ischemic and alcoholic group (I + A): animals receiving the same treatment as group A and, after four weeks, submitted to focal cerebral ischemia for 90 minutes, followed by reperfusion for 48 hours. The cerebellum samples were collected and immunohistochemical analysis of Caspase-9 protein and serum analysis by RT-PCR of microRNAs miR-21, miR-126 and miR155 were performed. Results The expression of Caspase-9 was higher in groups I, A and I + A. In the microRNAs analyses, miR-126 was higher in groups A and I + A, miR-155 was higher in groups I and I + A. Conclusions We conclude that apoptosis occurs in the cerebellar cortex, even if it is distant from the ischemic focus, and that microRNAs 126 and 155 show a correlation with cellular apoptosis in ischemic rats and those submitted to the chronic alcohol model.


RESUMO O objetivo deste estudo foi analisar o cerebelo de ratos submetidos à isquemia cerebral focal experimental, por oclusão da artéria cerebral média por 90 minutos, seguida de reperfusão por 48 horas, associada a um modelo de alcoolismo. Métodos Foram utilizados 50 ratos Wistar adultos, subdivididos em cinco grupos experimentais: grupo controle (C): animais submetidos apenas à anestesia; grupo sham (S): animais submetidos à simulação completa do procedimento cirúrgico; grupo isquêmico (I): animais submetidos à isquemia cerebral focal por 90 minutos, seguidos de reperfusão por 48 horas; grupo alcoólico (A): animais que receberam etanol absoluto diário diluído em 20% em água por quatro semanas; e grupo isquêmico e alcoólico (I + A): animais que recebem o mesmo tratamento do grupo A e, após quatro semanas, submetidos à isquemia cerebral focal por 90 minutos, seguidos de reperfusão por 48 horas. As amostras de cerebelo foram coletadas e a análise imuno-histoquímica da proteína Caspase-9 e a análise sérica por RT-PCR dos microRNAs miR-21, miR-126 e miR155 foram realizadas. Resultados A expressão de Caspase-9 foi maior nos grupos I, A e I + A. Nas análises de microRNAs, o miR-126 foi maior nos grupos A e I + A, o miR-155 foi maior nos grupos I e I + A. Conclusões Concluímos que a apoptose ocorre no córtex cerebelar, mesmo distante do foco isquêmico, e que os microRNAs 126 e 155 mostram uma correlação com a apoptose celular em ratos isquêmicos e submetidos ao modelo crônico de álcool.


Subject(s)
Animals , Male , Cerebellum/pathology , Brain Ischemia/pathology , Apoptosis , MicroRNAs/blood , Alcoholism/pathology , Caspase 9/analysis , Time Factors , Immunohistochemistry , Reperfusion Injury/pathology , Random Allocation , Cerebellum/chemistry , Brain Ischemia/blood , Rats, Wistar , Infarction, Middle Cerebral Artery , Alcoholism/blood , Real-Time Polymerase Chain Reaction
6.
J. bras. nefrol ; 41(3): 412-422, July-Sept. 2019. tab, graf
Article in English | LILACS | ID: biblio-1040242

ABSTRACT

Abstract Diabetic kidney disease (DKD) is a chronic complication of diabetes mellitus associated with significant morbidity and mortality regarded as a global health issue. MicroRNAs - small RNA molecules responsible for the post-transcriptional regulation of gene expression by degradation of messenger RNA or translational repression of protein synthesis - rank among the factors linked to the development and progression of DKD. This study aimed to offer a narrative review on investigations around the use of microRNAs in the diagnosis, monitoring, and treatment of DKD. Various microRNAs are involved in the pathogenesis of DKD, while others have a role in nephroprotection and thus serve as promising therapeutic targets for DKD. Serum and urine microRNAs levels have also been considered in the early diagnosis and monitoring of individuals with DKD, since increases in albuminuria, decreases in the glomerular filtration rate, and progression of DKD have been linked to changes in the levels of some microRNAs.


Resumo A doença renal do diabetes (DRD) é uma complicação crônica do diabetes mellitus associada à elevada morbidade e mortalidade, considerada um problema de saúde mundial. Dentre os fatores associados ao desenvolvimento e à progressão da DRD, destacam-se os microRNAs, que consistem em pequenas moléculas de RNA que regulam a expressão gênica por meio da degradação pós-transcricional do RNA mensageiro ou inibição translacional da síntese proteica. Este estudo teve como objetivo realizar uma revisão narrativa buscando investigar os microRNAs como auxiliares no diagnóstico, monitoramento e tratamento da DRD. Vários microRNAs estão envolvidos na patogênese da DRD, enquanto que outros têm papel nefroprotetor, consistindo assim em alvos terapêuticos promissores para o tratamento da DRD. A dosagem laboratorial dos microRNAs no soro e na urina também é muito promissora para o diagnóstico precoce e o monitoramento da DRD, já que os níveis de alguns microRNAs se alteram antes do aumento da albuminúria e da diminuição da taxa de filtração glomerular e podem ainda se alterar com a progressão da DRD.


Subject(s)
Humans , Animals , Rats , MicroRNAs/urine , MicroRNAs/blood , Diabetic Nephropathies/drug therapy , Biomarkers/urine , Biomarkers/blood , Diabetes Mellitus, Type 1/complications , Diabetes Mellitus, Type 2/complications , Diabetic Nephropathies/diagnosis , Diabetic Nephropathies/genetics , Diabetic Nephropathies/pathology , Albuminuria , Molecular Targeted Therapy , Glomerular Filtration Rate
7.
Braz. j. med. biol. res ; 51(12): e7574, 2018. graf
Article in English | LILACS | ID: biblio-974257

ABSTRACT

Bone fracture is a common medical condition, which may occur due to traumatic injury or disease-related conditions. Evidence suggests that microRNAs (miRNAs) can regulate osteoblast differentiation and function. In this study, we explored the effects and mechanism of miR-221 on the growth and migration of osteoblasts using MC3T3-E1 cells. The expression levels of miR-221 in the different groups were measured by qRT-PCR. Then, miR-221 mimic and inhibitor were transfected into MC3T3-E1 cells, and cell viability and migration were measured using the CCK-8 assay and the Transwell migration assay. Additionally, the expression levels of differentiation-related factors (Runx2 and Ocn) and ZFPM2 were measured by qRT-PCR. Western blot was used to measure the expression of cell cycle-related proteins, epithelial-mesenchymal transition (EMT)-related proteins, ZFPM2, and Wnt/Notch, and Smad signaling pathway proteins. miR-221 was significantly up-regulated in the patients with lumbar compression fracture (LCM) and trochanteric fracture (TF). miR-221 promoted ALP, Runx2, and OPN expressions in MC3T3-E1 cells. miR-221 overexpression significantly increased cell proliferation, migration, differentiation, and matrix mineralization, whereas suppression of miR-221 reversed these effects. Additionally, the results displayed that ZFPM2 was a direct target gene of miR-221, and overexpression of ZFPM2 reversed the promoting effects of miR-221 overexpression on osteoblasts. Mechanistic study revealed that overexpression of miR-221 inactivated the Wnt/Notch and Smad signaling pathways by regulating ZFPM2 expression. We drew the conclusions that miR-221 overexpression promoted osteoblast proliferation, migration, and differentiation by regulation of ZFPM2 expression and deactivating the Wnt/Notch and Smad signaling pathways.


Subject(s)
Humans , Animals , Rabbits , Cell Differentiation/physiology , Cell Movement/physiology , MicroRNAs/physiology , Cell Proliferation/physiology , DNA-Binding Proteins/physiology , Fractures, Bone/blood , Osteoblasts/physiology , Reference Values , Transcription Factors/blood , Cell Survival/physiology , Blotting, Western , Analysis of Variance , 3T3 Cells , MicroRNAs/blood , DNA-Binding Proteins/blood
8.
Clinics ; 73: e184, 2018. tab, graf
Article in English | LILACS | ID: biblio-952804

ABSTRACT

OBJECTIVE: MicroRNAs (miRNAs) are small non-coding RNAs that regulate gene expression at the posttranscriptional level. Some miRNAs, including let-7a and miR-195, have been described as tumor suppressors. However, the roles of these microRNAs in breast cancer progression remain controversial. The aim of this study is to evaluate miR-195 and let-7a expression as potential biomarkers of invasive breast cancer. METHODS: In the present study, 200 individuals were separated into three groups: (i) 72 women constituting the control group who were selected according to rigorous and well-established criteria; (ii) 56 patients with benign breast tumors; and (iii) 72 patients with malignant breast cancers of different clinical stages. The miR-195 and let-7a expression levels in serum were evaluated by real-time PCR. The results were assessed alone and in combination, and the analysis included an estimation of sensitivity and specificity in ROC curves. RESULTS: Compared with the benign and control groups, both microRNAs were downregulated in the malignant breast cancer patient group. Compared with the malignant group, the combination of both biomarkers in the control and benign groups showed good sensitivity and specificity in the serum with AUCs of 0.75 and 0.72, respectively. The biomarker combination for the control group versus the malignant group exhibited a better sensitivity and specificity than for the benign group versus the malignant group. CONCLUSION: These findings support the evidence that the analysis of miR-195 and let-7a can be used as a non-invasive biomarker for breast cancer detection.


Subject(s)
Breast Neoplasms/blood , MicroRNAs/blood , Reference Values , Breast Neoplasms/pathology , Biomarkers, Tumor/blood , Case-Control Studies , Down-Regulation , Gene Expression Regulation, Neoplastic , Logistic Models , Prospective Studies , Risk Factors , Analysis of Variance , Sensitivity and Specificity , Real-Time Polymerase Chain Reaction , Carcinogenesis/pathology , Neoplasm Invasiveness , Neoplasm Staging
9.
Braz. j. med. biol. res ; 51(3): e6426, 2018. tab, graf
Article in English | LILACS | ID: biblio-889045

ABSTRACT

Occupational noise-induced hearing loss (ONIHL) is a prevalent occupational disorder that impairs auditory function in workers exposed to prolonged noise. However, serum microRNA expression in ONIHL subjects has not yet been studied. We aimed to compare the serum microRNA expression profiles in male workers of ONIHL subjects and controls. MicroRNA microarray analysis revealed that four serum microRNAs were differentially expressed between controls (n=3) and ONIHL subjects (n=3). Among these microRNAs, three were upregulated (hsa-miR-3162-5p, hsa-miR-4484, hsa-miR-1229-5p) and one was downregulated (hsa-miR-4652-3p) in the ONIHL group (fold change >1.5 and Pbon value <0.05). Real time quantitative PCR was conducted for validation of the microRNA expression. Significantly increased serum levels of miR-1229-5p were found in ONIHL subjects compared to controls (n=10 for each group; P<0.05). A total of 659 (27.0%) genes were predicted as the target genes of miR-1229-5p. These genes were involved in various pathways, such as mitogen-activated protein kinase (MAPK) signaling pathway. Overexpression of miR-1229-5p dramatically inhibited the luciferase activity of 3′ UTR segment of MAPK1 (P<0.01). Compared to the negative control, HEK293T cells expressing miR-1229-5p mimics showed a significant decline in mRNA levels of MAPK1 (P<0.05). This preliminary study indicated that serum miR-1229-5p was significantly elevated in ONIHL subjects. Increased miR-1229-5p may participate in the pathogenesis of ONIHL through repressing MAPK1 signaling.


Subject(s)
Humans , Male , Adult , Middle Aged , Occupational Exposure/adverse effects , Mitogen-Activated Protein Kinase 1/analysis , MicroRNAs/blood , Hearing Loss, Noise-Induced/blood , Occupational Diseases/blood , Biomarkers/blood , Case-Control Studies , Gene Expression Regulation , MicroRNAs/genetics , Real-Time Polymerase Chain Reaction , Gene Ontology , Hearing Loss, Noise-Induced/genetics , Occupational Diseases/genetics
10.
Braz. j. med. biol. res ; 51(7): e7212, 2018. tab, graf
Article in English | LILACS | ID: biblio-889122

ABSTRACT

Aberrant expression of microRNAs (miRNAs) has been shown to be involved in early observations of depression. The aim of this study was to determine if serum levels of miRNA-451a, miRNA-34a-5p, and miRNA-221-3p can serve as indicators of disease progression or therapeutic efficacy in depression. We collected data from 84 depressed patients and 78 control volunteers recruited from the medical staff at the West China Hospital. Depression severity was rated using the 24-item Hamilton Depression Scale (HAMD). Serum miRNA-451a, miRNA-34a-5p, and miRNA-221-3p levels were determined in samples from the depressed patients before and 8 weeks after antidepressant treatment as well as in samples from controls. Compared with the controls, the patients had lower miRNA-451a levels, higher miRNA-34a-5p and miRNA-221-3p levels, and increased HAMD scores whether they underwent antidepressant treatment or not. Eight weeks after antidepressant treatment, the patients exhibited increased miRNA-451a levels, decreased miRNA-34a-5p and miRNA-221-3p levels, and reduced HAMD scores. The serum level of miRNA-451a was negatively correlated with HAMD scores of the patients, while the serum levels of miRNA-34a-5p and miRNA-221-3p were positively correlated with HAMD scores whether the patients underwent antidepressant treatment or not. Paroxetine was markedly effective in 50 patients who also displayed an increased level of miRNA-451a but reduced levels of miRNA-34a-5p and miRNA-221-3p. In contrast, paroxetine was moderately effective or ineffective in 34 patients. In conclusion, depressed patients had lower serum miRNA-451a but higher serum miRNA-34a-5p and miRNA-221-3p, and these miRNAs are potential predictors of the efficacy of antidepressants.


Subject(s)
Humans , Male , Female , Adult , Paroxetine/therapeutic use , Antidepressive Agents, Second-Generation/therapeutic use , MicroRNAs/blood , Depression/blood , Suicidal Ideation , Psychiatric Status Rating Scales , Biomarkers/blood , Case-Control Studies , Treatment Outcome , Gene Expression Profiling , Depression/drug therapy , Educational Status , Real-Time Polymerase Chain Reaction
11.
Rev. Soc. Bras. Med. Trop ; 50(2): 161-166, Mar.-Apr. 2017. tab
Article in English | LILACS | ID: biblio-842836

ABSTRACT

Abstract INTRODUCTION Hepatitis B virus (HBV) constitutes an important risk factor for cirrhosis and hepatocellular carcinoma (HCC). The link between circulating microRNAs and HBV has been previously reported, although not as a marker of liver disease progression in chronic hepatitis B (CHB). The aim of this study was to characterize miRNA expression profiles between CHB with and without cirrhosis or HCC. METHODS: A total of 12 subjects were recruited in this study. We employed an Affymetrix Gene Chip miRNA 3.0 Array to provide universal miRNA coverage. We compared microRNA expression profiles between CHB with and without cirrhosis/HCC to discover possible prognostic markers associated with the progression of CHB. RESULTS: Our results indicated 8 differently expressed microRNAs, of which miRNA-935, miRNA-342, miRNA-339, miRNA-4508, miRNA-3615, and miRNA-3200 were up-regulated, whereas miRNA-182 and miRNA-4485 were down-regulated in patients with CHB who progressed to cirrhosis/HCC as compared to those without progression. CONCLUSIONS: We demonstrated the differential expression of miRNA-935, miRNA-342, miRNA-339, miRNA-4508, miRNA-3615, miRNA-3200, miRNA-182, and miRNA-4485 between patients with HBV without cirrhosis/HCC and those who had progressed to these more severe conditions. These miRNAs may serve as novel and non-invasive prognostic markers for early detection of CHB-infected patients who are at risk of progression to cirrhosis and/or HCC.


Subject(s)
Humans , Male , Female , Adult , Aged , Carcinoma, Hepatocellular/metabolism , Hepatitis B, Chronic/metabolism , MicroRNAs/blood , Liver Cirrhosis/metabolism , Liver Neoplasms/metabolism , Biomarkers/blood , Gene Expression Regulation , Predictive Value of Tests , Carcinoma, Hepatocellular/genetics , Disease Progression , Hepatitis B, Chronic/genetics , Gene Expression Profiling , MicroRNAs/genetics , Liver Cirrhosis/genetics , Liver Neoplasms/genetics , Middle Aged
12.
Clinics ; 72(2): 111-115, Feb. 2017. tab, graf
Article in English | LILACS | ID: biblio-840040

ABSTRACT

OBJECTIVES: The aim of this study was to compare the expression levels of serum miRNAs in diabetic retinopathy and type 2 diabetes mellitus. METHODS: Serum miRNA expression profiles from diabetic retinopathy cases (type 2 diabetes mellitus patients with diabetic retinopathy) and type 2 diabetes mellitus controls (type 2 diabetes mellitus patients without diabetic retinopathy) were examined by miRNA-specific microarray analysis. Quantitative real-time polymerase chain reaction was used to validate the significantly differentially expressed serum miRNAs from the microarray analysis of 45 diabetic retinopathy cases and 45 age-, sex-, body mass index- and duration-of-diabetes-matched type 2 diabetes mellitus controls. The relative changes in serum miRNA expression levels were analyzed using the 2-ΔΔCt method. RESULTS: A total of 5 diabetic retinopathy cases and 5 type 2 diabetes mellitus controls were included in the miRNA-specific microarray analysis. The serum levels of miR-3939 and miR-1910-3p differed significantly between the two groups in the screening stage; however, quantitative real-time polymerase chain reaction did not reveal significant differences in miRNA expression for 45 diabetic retinopathy cases and their matched type 2 diabetes mellitus controls. CONCLUSION: Our findings indicate that miR-3939 and miR-1910-3p may not play important roles in the development of diabetic retinopathy; however, studies with a larger sample size are needed to confirm our findings.


Subject(s)
Humans , Animals , Aged , Diabetes Mellitus, Type 2/genetics , Diabetic Retinopathy/genetics , MicroRNAs/blood , Diabetes Mellitus, Type 2/blood , Diabetic Retinopathy/blood , Gene Expression Profiling , Real-Time Polymerase Chain Reaction
13.
Braz. j. med. biol. res ; 50(12): e6211, 2017. tab, graf
Article in English | LILACS | ID: biblio-888961

ABSTRACT

Recent evidence suggests that cell-derived circulating miRNAs may serve as biomarkers of cardiovascular diseases. However, a few studies have investigated the potential of circulating miRNAs as biomarkers for left ventricular hypertrophy (LVH). In this study, we aimed to characterize the miRNA profiles that could distinguish hypertensive patients with LHV, hypertensive patients without LVH and control subjects, and identify potential miRNAs as biomarkers of LVH. LVH was defined by left ventricular mass indexed to body surface area >125 g/m2 in men and >110 g/m2 in women and patients were classified as hypertensive when presenting a systolic blood pressure of 140 mmHg or more, or a diastolic blood pressure of 90 mmHg or more. We employed miRNA PCR array to screen serum miRNAs profiles of patients with LVH, essential hypertension and healthy subjects. We identified 75 differentially expressed miRNAs, including 49 upregulated miRNAs and 26 downregulated miRNAs between LVH and control patients. We chose 2 miRNAs with significant differences for further testing in 59 patients. RT-PCR analysis of serum samples confirmed that miR-7-5p and miR-26b-5p were upregulated in the serum of LVH hypertensive patients compared with healthy subjects. Our findings suggest that these miRNAs may play a role in the pathogenesis of hypertensive LVH and may represent novel biomarkers for this disease.


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Aged , Hypertension/blood , Hypertrophy, Left Ventricular/blood , MicroRNAs/blood , Analysis of Variance , Biomarkers/blood , Case-Control Studies , Down-Regulation , Gene Expression Profiling/methods , Hypertension/genetics , Hypertrophy, Left Ventricular/genetics , Predictive Value of Tests , Real-Time Polymerase Chain Reaction , Reference Standards , Reference Values , Risk Factors , Up-Regulation
14.
Braz. j. med. biol. res ; 50(3): e5817, 2017. tab, graf
Article in English | LILACS | ID: biblio-839270

ABSTRACT

The aim of this study was to investigate the effect of Roux-en-Y gastric bypass (RYGB) on the peripheral blood microRNAs (miRNAs) of patients with type 2 diabetes mellitus (T2DM). miRNAs are small 20- to 22-nucleotide (nt) noncoding RNAs. They constitute a novel class of gene regulators that negatively regulate gene expression at the post-transcriptional level. miRNAs play an important role in several biological processes. Twelve patients with T2DM who were scheduled to undergo laparoscopic RYGB surgery were separated into two groups, using a body mass index of 30 kg/m2 as a cut-off point. Venous blood was collected before operation and 12 months after operation. A significant change was observed in the peripheral blood miRNA expression profile of both groups after RYGB surgery compared with those before operation. The expression levels of hsa-miR-29a-3p, hsa-miR-122-5p, hsa-miR-124-3p, and hsa-miR-320a were downregulated. The methylation state of the CpG sites within an approximately 400-bp genomic DNA fragment of each of the four miRNA genes, including about 200 bp upstream and 100 bp downstream of the pre-miRNA, did not vary after RYGB surgery. With remission of T2DM in both groups, RYGB could modulate the expression level of many peripheral blood miRNAs associated with lipid metabolism, insulin secretion, beta-cell function, and insulin resistance. The expression level of peripheral blood diabetes-related miRNA varied in patients with T2DM after receiving RYGB surgery, laying a strong foundation for future studies on this subject. The molecular mechanisms underlying RYGB surgery that can cause aberrant expression of miRNA remains to be determined.


Subject(s)
Humans , Adult , Diabetes Mellitus, Type 2/blood , MicroRNAs/blood , Obesity, Morbid/surgery , Diabetes Mellitus, Type 2/complications , DNA Methylation , Gastric Bypass , Obesity, Morbid/blood , Obesity, Morbid/complications , Reverse Transcriptase Polymerase Chain Reaction
15.
Braz. j. med. biol. res ; 50(4): e5533, 2017. tab, graf
Article in English | LILACS | ID: biblio-839276

ABSTRACT

We analyzed microRNA (miR)-142-3p expression in leucocytes of the peripheral blood and urinary sediment cell samples obtained from kidney transplant recipients who developed graft dysfunction. Forty-one kidney transplant recipients with kidney graft dysfunction and 8 stable patients were included in the study. The groups were divided according to histological analysis into acute rejection group (n=23), acute tubular necrosis group (n=18) and stable patients group used as a control for gene expression (n=8). Percutaneous biopsies were performed and peripheral blood samples and urine samples were obtained. miR-142-3p was analyzed by real-time polymerase chain reaction. The group of patients with acute tubular necrosis presented significantly higher expressions in peripheral blood (P<0.05) and urine (P<0.001) compared to the stable patients group. Also, in the peripheral blood, miR-142-3p expression was significantly higher in the acute tubular necrosis group compared to the acute rejection group (P<0.05). Urine samples of the acute rejection group presented higher expression compared to the stable patients group (P<0.001) but the difference between acute tubular necrosis and acute rejection groups was not significant in the urinary analyzes (P=0.079). miR-142-3p expression has a distinct pattern of expression in the setting of post-operative acute tubular necrosis after kidney transplantation and may potentially be used as a non-invasive biomarker for renal graft dysfunction.


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Aged , Graft Rejection/pathology , Kidney Transplantation/adverse effects , Kidney Tubular Necrosis, Acute/pathology , MicroRNAs/blood , MicroRNAs/urine , Up-Regulation/physiology , Biomarkers/blood , Biomarkers/urine , Gene Expression , Graft Rejection/blood , Graft Rejection/urine , Image-Guided Biopsy , Kidney Tubular Necrosis, Acute/blood , Kidney Tubular Necrosis, Acute/urine , Kidney/pathology , Primary Graft Dysfunction/blood , Primary Graft Dysfunction/pathology , Primary Graft Dysfunction/urine , Real-Time Polymerase Chain Reaction , Reference Values , Sensitivity and Specificity , Statistics, Nonparametric , Transplant Recipients , Treatment Outcome
16.
Braz. j. med. biol. res ; 50(6): e6050, 2017. tab, graf
Article in English | LILACS | ID: biblio-839310

ABSTRACT

We aimed to investigate the potential role and mechanism of microRNA-30c (miR-30c) in the pathological development of chronic hepatitis B (CHB). The serum levels of miR-30c in hepatitis B virus (HBV) carrier Xinjiang Uygur patients with inactive, low-replicative, high-replicative and HBe antigen-positive CHB were investigated. HepG2 cells were co-transfected with pHBV1.3 and miR-30c mimic or inhibitor or scramble RNA. The effects of miR-30c dysregulation on HBV replication and gene expression, cell proliferation and cell cycle were then investigated. miR-30c was down-regulated in Xinjiang Uygur patients with CHB compared to healthy controls and its expression level discriminated HBV carrier patients with inactive, low-replicative, high-replicative and HBe antigen-positive risk for disease progression. Overexpression of miR-30c significantly inhibited HBV replication and the expressions of HBV pgRNA, capsid-associated virus DNA and Hbx in hepatoma cells. Moreover, overexpression of miR-30c significantly inhibited cell proliferation and delayed G1/S phase transition in hepatoma cells. Opposite effects were obtained after suppression of miR-30c. Our results indicate that miR-30c was down-regulated in Xinjiang Uygur patients with CHB, and miR-30c levels could serve as a marker for risk stratification of HBV infection. Down-regulation of miR-30c may result in the progression of CHB via promoting HBV replication and cell proliferation.


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Disease Progression , Hepatitis B virus/genetics , Hepatitis B, Chronic/blood , MicroRNAs/blood , Carcinoma, Hepatocellular/genetics , Carcinoma, Hepatocellular/pathology , Cell Proliferation/genetics , China , Down-Regulation , Gene Expression Regulation, Viral , Hepatitis B, Chronic/ethnology , Liver Neoplasms/genetics , Liver Neoplasms/pathology , Maze Learning
17.
Rev. méd. Chile ; 144(3): 355-363, mar. 2016. ilus, tab
Article in Spanish | LILACS | ID: lil-784905

ABSTRACT

MicroRNAs are small, non-coding molecules with a crucial function in the cell´s biologic regulation. Circulating levels of miRNAs may be useful biomarkers in metabolic diseases such as type 2 Diabetes Mellitus (DM2), which alters the circulating concentrations of several types of miRNA. Specific serum profiles of these molecules have been identified in high-risk patients before the development of DM2 and its chronic complications. Most importantly, these profiles can be modified with physical exercise, which is crucial in the treatment of metabolic diseases. Acute physical activity alone can induce changes in tissue specific miRNAs, and responses are different in aerobic or non-aerobic training. Muscle and cardiovascular miRNAs, which may play an important role in the adap tation to exercise, are predominantly altered. Even further, there is a correlation between serum levels of miRNAs and fitness, suggesting a role for chronic exercise in their regulation. Thus, miRNAs are molecules of growing importance in exercise physiology, and may be involved in the mechanisms behind the beneficial effects of physical activity for patients with metabolic diseases.


Subject(s)
Humans , Exercise/physiology , MicroRNAs/blood , Diabetes Mellitus, Type 2/physiopathology , Diabetes Mellitus, Type 2/blood , Biomarkers/blood , Risk Factors , Exercise Therapy
18.
Article in English | WPRIM | ID: wpr-110766

ABSTRACT

Drug-induced liver injury (DILI) is a significant threat to patient health and a major concern during drug development. Recently, multiple circulating microRNAs (miRNAs) have been reported to be potential biomarkers for DILI. To adapt and validate miRNAs for clinical use, we investigated the time-course changes in miR-122 expression levels in an acetaminophen-induced liver injury model in rats. In addition, miR-155 and miR-21 were evaluated as makers of inflammation and regeneration, respectively, to characterize liver status. Our results revealed that miR-122 is an early and sensitive biomarker of hepatocellular injury at a stage when alanine transaminase, aspartate transaminase, and total bilirubin were not detectable. However, no significant differences in the expression levels of other miRNAs (miR-155 and -21) were observed between treatment and vehicle groups. Collectively, these time-course changes in the expression levels of miRNAs may be useful as markers for clinical decision-making, in the diagnosis and treatment of DILI.


Subject(s)
Acetaminophen/toxicity , Animals , Biomarkers/blood , Chemical and Drug Induced Liver Injury/blood , Gene Expression Profiling , Gene Expression Regulation/drug effects , Hepatocytes/drug effects , Inflammation/blood , Liver Regeneration , MicroRNAs/blood , Predictive Value of Tests , Rats , Time
19.
Yonsei Medical Journal ; : 298-305, 2016.
Article in English | WPRIM | ID: wpr-147362

ABSTRACT

PURPOSE: Tumor-associated microRNAs have been detected in cancer, though whether plasma microRNA-155 (miR-155) could be a potential biomarker for laryngeal squamous cell carcinoma (LSCC) prognosis is unclear. We aimed to determine how miR-155 can be used to predict the clinical characteristics of patients with LSCC and correctly diagnose them. MATERIALS AND METHODS: We collected tissue samples and peripheral blood samples before and after treatment from 280 LSCC cases and 560 controls. Real-time quantitative reverse transcription PCR was employed in this study to compare the relative expression of miR-155. RESULTS: A total of 280 LSCC patients and 560 age- and sex-matched controls were included in the study. The miR-155 level was more up-regulated in LSCC tissue than in the non-tumor tissues (13.6+/-2.4 vs. 3.1+/-0.80, p<0.001). Additionally, a significantly higher miR-155 level in plasma samples from LSCC patients than in those of the controls (8.9+/-1.25 vs. 1.8+/-0.8, p<0.001) was reported. Tissue miR-155 showed an area under the curve (AUC) of 0.933, with a sensitivity of 82.6% and a specificity of 89.2%. The AUC for plasma miR-155 was 0.757, with a sensitivity of 58.4% and a specificity of 69.5%. When early LSCC in TNM I stage was considered, tissue miR-155 showed an area under the curve of 0.804, with a sensitivity of 85.2% and a specificity of 87.3%. CONCLUSION: The expression of tissue and plasma miR-155 were significantly up-regulated in patients with LSCC. Our work will serve as a basis for further investigation, preferably large-scale validation in clinical trials.


Subject(s)
Aged , Biomarkers, Tumor/blood , Carcinoma, Squamous Cell/blood , Case-Control Studies , Early Diagnosis , Female , Gene Expression Profiling , Gene Expression Regulation, Neoplastic , Head and Neck Neoplasms , Humans , Laryngeal Neoplasms/blood , Male , MicroRNAs/blood , Middle Aged , Prognosis , Real-Time Polymerase Chain Reaction , Up-Regulation
20.
Acta cir. bras ; 31(supl.1): 13-18, 2016. tab, graf
Article in English | LILACS | ID: lil-779760

ABSTRACT

PURPOSE: This paper describes the ability of miRNA value predict oncological outcomes in CRC patients and correlates to clinical and pathologic variables. METHODS: We prospectively analyzed the serological expression of microRNA-21, microRNA-34a, and microRNA-126 in 37 stage II - IV CRC patients and correlate to seven fit counterparts. Serological microRNAs were extracted using the miRNeasy Mini Kit(r) (Qiagen, Hilden, Germany). Quantification of microRNAs was performed using TaqMan Master Mix(r) reagent (Applied Biosystems, USA). RESULTS: We obtained serological underexpression microRNA-21, microRNA-34a, and microRNA-126 in CRC group. However, miRNAs serological values do not impact prognosis. Furthermore, miRNAs was not influenced by CEA values, TNM staging, and histological subtype. CONCLUSION: Despite lower expression of miR-21, miR-34a and miR-126 in the CRC group, no association with poor prognosis was found.


Subject(s)
Humans , Male , Female , Carcinoma/blood , Colorectal Neoplasms/blood , Adenoma/blood , MicroRNAs/blood , Prognosis , Reference Values , Carcinoma/genetics , Colorectal Neoplasms/genetics , Carcinoembryonic Antigen/blood , Biomarkers, Tumor/blood , Adenoma/genetics , Case-Control Studies , Prospective Studies , Age Factors , Real-Time Polymerase Chain Reaction , Neoplasm Recurrence, Local , Neoplasm Staging
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