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1.
Recent Pat Anticancer Drug Discov ; 19(4): 503-515, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-39044710

RESUMEN

BACKGROUND: Both apurinic/apyrimidinic endodeoxyribonuclease 1 (APE1) inhibition and melatonin suppress prostate cancer (PCa) growth. OBJECTIVE: This study evaluated the therapeutic efficiency of self-assembled and prostate-specific membrane antigen (PSMA)-targeted nanocarrier loading 125I radioactive particles and encapsulating siRNA targeting APE1 (siAPE1) and melatonin for PCa. METHODS: The linear polyarginine R12 polypeptide was prepared using Fmoc-Arg-Pbf-OH. The PSMA-targeted polymer was synthesized by conjugating azide-modified R12 peptide to PSMA monoclonal antibody (mAb). Before experiments, the PSMA-R12 nanocarrier was installed with melatonin and siAPE1, which were subsequently labeled by 125I radioactive particles. In vitro biocompatibility and cytotoxicity of nanocomposites were examined in LNCaP cells and in vivo biodistribution and pharmacokinetics were determined using PCa tumor-bearing mice. RESULTS: PSMA-R12 nanocarrier was ~120 nm in size and was increased to ~150 nm by melatonin encapsulation. PSMA-R12 nanoparticles had efficient loading capacities of siAPE1, melatonin, and 125I particles. The co-delivery of melatonin and siAPE1 by PSMA-R12-125I showed synergistic effects on suppressing LNCaP cell proliferation and Bcl-2 expression and promoting cell apoptosis and caspase-3 expression. Pharmacokinetics analysis showed that Mel@PSMA-R12-125I particles had high uptake activity in the liver, spleen, kidney, intestine, and tumor, and were accumulated in the tumor sites within the first 8 h p.i., but was rapidly cleared from all the tested organs at 24 h p.i. Administration of nanoparticles to PCa tumors in vivo showed that Mel@PSMA-R12- 125I/siAPE1 had high efficiency in suppressing PCa tumor growth. CONCLUSION: The PSMA-targeted nanocarrier encapsulating siAPE1 and melatonin is a promising therapeutic strategy for PCa and can provide a theoretical basis for patent applications.


Asunto(s)
Antígenos de Superficie , Glutamato Carboxipeptidasa II , Radioisótopos de Yodo , Melatonina , Nanopartículas , Neoplasias de la Próstata , Masculino , Animales , Neoplasias de la Próstata/tratamiento farmacológico , Neoplasias de la Próstata/patología , Humanos , Radioisótopos de Yodo/administración & dosificación , Melatonina/farmacología , Melatonina/administración & dosificación , Línea Celular Tumoral , Nanopartículas/química , Ratones , Glutamato Carboxipeptidasa II/antagonistas & inhibidores , Glutamato Carboxipeptidasa II/metabolismo , Distribución Tisular , Ratones Desnudos , Ensayos Antitumor por Modelo de Xenoinjerto , Apoptosis/efectos de los fármacos , Ratones Endogámicos BALB C , ARN Interferente Pequeño/administración & dosificación , ARN Interferente Pequeño/farmacología
2.
Front Genet ; 13: 984279, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-36199571

RESUMEN

Background: With the continued advancement of RNA-seq (RNA-sequencing), microRNA (miRNA) editing events have been demonstrated to play an important role in different malignancies. However, there is yet no description of the miRNA editing events in recurrent bladder cancer. Objective: To identify and compare miRNA editing events in primary and recurrent bladder cancer, as well as to investigate the potential molecular mechanism and its impact on patient prognosis. Methods: We examined the mRNA and miRNA transcriptomes of 12 recurrent bladder cancer cases and 13 primary bladder cancer cases. The differentially expressed mRNA sequences were analyzed. Furthermore, we identified the differentially expressed genes (DEGs) in recurrent bladder cancer. The Gene Ontology (GO) functional enrichment analyses on DEGs and gene set enrichment analysis were performed. The consensus molecular subtype (CMS) classification of bladder cancer was identified using the Consensus MIBC package in R (4.1.0); miRNA sequences were then further subjected to differentially expressed analysis and pathway enrichment analysis. MiRNA editing events were identified using miRge3.0. miRDB and TargetScanHuman were used to predict the downstream targets of specific differentially edited or expressed miRNAs. The expression levels of miR-154-5p and ADAR were validated by RT-qPCR. Finally, survival and co-expression studies were performed on the TCGA-BLCA cohort. Results: First, the mRNA expression levels in recurrent bladder cancer changed significantly, supporting progression via related molecular signal pathways. Second, significantly altered miRNAs in recurrent bladder cancer were identified, with miR-154-5p showing the highest level of editing in recurrent bladder cancer and may up-regulate the expression levels of downstream targets HS3ST3A1, AQP9, MYLK, and RAB23. The survival analysis results of TCGA data revealed that highly expressed HS3ST3A1 and RAB23 exhibited poor prognosis. In addition, miR-154 editing events were found to be significant to CMS classification. Conclusion: MiRNA editing in recurrent bladder cancer was detected and linked with poor patient prognosis, providing a reference for further uncovering the intricate molecular mechanism in recurrent bladder cancer. Therefore, inhibiting A-to-I editing of miRNA may be a viable target for bladder cancer treatment, allowing current treatment choices to be expanded and individualized.

3.
Neurosci Lett ; 790: 136888, 2022 11 01.
Artículo en Inglés | MEDLINE | ID: mdl-36179903

RESUMEN

Mutations in the PRKN gene are the major cause of autosomal recessive Parkinson's disease (PD). However, studies of parkin-/- mice did not show the loss of dopaminergic neurons and motor phenotypes at a young age. Whether pathological changes are associated with nonmotor symptoms of PD remains unclear. Visual impairment is one common nonmotor symptom in patients with PD. This study aimed to examine the effects of parkin-/- on mitochondria and synaptic structures in the retina of 6-month-old mice. Compared with wild-type mice, parkin-/- mice exhibited a slightly thickened retina. Also, the number of normal mitochondria (mito-5 grade) in rod spherules (RSs) significantly decreased (p < 0.01), the average area of mitochondria was significantly larger (p < 0.001), and the number of ribbons in RSs significantly decreased (p = 0.02). The RSs of parkin-/- mice showed severe swelling after flicker stimulation. Our study implicated that parkin-/- led to the impairment of mitochondria and abnormality of the synaptic structure in mouse retina at a young age, which damaged the synaptic transmission between photoreceptors and second-order retinal neurons and resulted in visual impairment.


Asunto(s)
Enfermedad de Parkinson , Ubiquitina-Proteína Ligasas , Ratones , Animales , Ubiquitina-Proteína Ligasas/genética , Ubiquitina-Proteína Ligasas/metabolismo , Mitocondrias/patología , Neuronas Dopaminérgicas/metabolismo , Enfermedad de Parkinson/genética , Retina/patología , Trastornos de la Visión/metabolismo
4.
J Clin Neurosci ; 77: 49-54, 2020 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-32418810

RESUMEN

To explore the influence of serum lactate dehydrogenase (LDH) level on remote diffusion-weighted imaging lesions (rDWILs) after spontaneous intracerebral hemorrhage (ICH). A consecutive cohort of 160 patients with spontaneous ICH who had brain MRI within 4 weeks of ICH onset were collected and analyzed retrospectively. rDWILs showed high signal on diffusion-weighted image (DWI) while low signal on apparent diffusion coefficient (ADC), and at least 20 mm away from the hemorrhage focus. The blood samples were obtained within 24 h after ICH onset from all patients. Lactate dehydrogenase (LDH) levels in blood were collected from serum biochemical tests. We use multivariate logistic regression analyses to investigate the association between serum LDH level and rDWILs after ICH. The average serum LDH level was 186.5 ± 35.6 U/L. And this level was higher in patients who presented rDWILs than in those without rDWILs. With the best cut-off value of 191 by using receiver operating characteristic (ROC) analysis, elevated LDH was associated with the presence of rDWILs independently (OR = 1.024, 95%CI = 1.011-1.037, P < 0.001) in the bivariate logistic regression analysis with adjustment for age, sex, previous ischemic stroke/TIA, smoker, SBP on admission, hematoma volume, and intraventricular hemorrhage (IVH). The sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV) of LDH ≥ 191 U/L for rDWILs were 70.4%, 72.2%, 33.9%, 94.2%, respectively. Our study suggests serum LDH level has a significant correlation with rDWILs after spontaneous ICH. Patients with higher serum LDH level in 24 h after ICH onset may be a useful predictor for rDWILs occurrence.


Asunto(s)
Hemorragia Cerebral/sangre , Hemorragia Cerebral/diagnóstico por imagen , Imagen de Difusión por Resonancia Magnética/métodos , L-Lactato Deshidrogenasa/sangre , Anciano , Biomarcadores/sangre , Estudios de Cohortes , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Retrospectivos
6.
Curr Microbiol ; 73(1): 77-83, 2016 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-27032404

RESUMEN

Listeria monocytogenes is a facultative anaerobic Gram-positive bacterium. It is well adapted to external environments and able to infect both humans and animals. To understand the impacts of ncRNA Rli60 on the adaptability of L. monocytogenes to environmental stresses and biofilm formation, a rli60 deletion strain of L. monocytogenes (LM-Δrli60) was constructed using splicing by overlap extension PCR (SOE-PCR) and homologous recombination and then compared it with wild-type strain L. monocytogenes EGD-e in the aspects of adaptability to environmental stresses by measuring their growth under stresses of different temperatures, and acidic, alkaline, hypertonic and alcoholic conditions, and capability of biofilm formation by using crystal violet staining, as well as the transcriptional levels of genes (gltB and gltC) related to the biofilm formation by real-time quantitative PCR (qRT-PCR). The results showed that (1) the growth of LM-Δrli60 strain was significantly slower under environmental stresses of low temperature (30 °C), high temperature (42 °C), as well as alkaline and alcoholic conditions, (2) the amount of biofilm formed by LM-Δrli60 was attenuated, and (3) the transcriptional levels of gltB and gltC genes at 24 h and 48 h in LM-Δrli60 revealed a significant reduction. Overall, the results confirmed that ncRNA Rli60 plays important roles in regulating the adaptability of L. monocytogenes to environmental stresses and biofilm formation possibly through impacting the expression of gltB and gltC genes.


Asunto(s)
Biopelículas , Regulación Bacteriana de la Expresión Génica , Listeria monocytogenes/fisiología , ARN Bacteriano/metabolismo , ARN Largo no Codificante/metabolismo , Adaptación Fisiológica , Proteínas Bacterianas/genética , Proteínas Bacterianas/metabolismo , Humanos , Listeria monocytogenes/genética , ARN Bacteriano/genética , ARN Largo no Codificante/genética , Estrés Fisiológico
7.
J Microbiol Immunol Infect ; 49(4): 502-8, 2016 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-25442865

RESUMEN

BACKGROUND: Listeria monocytogenes (LM) is an important zoonotic foodborne pathogen. Noncoding RNA (ncRNA) has an important role in regulating its virulence. As a member of ncRNA, however, the function of Rli60 in regulating LM virulence remain unclear. The aim of this study was to investigate the role of Rli60 in regulating LM virulence. METHODS: Using a homologous recombination method, a LM EGD-e rli60 gene deletion strain (LM-Δrli60) was constructed and compared with a LM EGD-e strain in the following respects: (1) adhesiveness, invasion ability, intracellular survival, proliferation, and transcription of virulence genes in the mouse macrophage cell line RAW264.7; (2) 50% lethal dose (LD50) to the BALB/c mouse; and (3) the amount in the mouse liver and spleen and the effects on pathology of mouse liver, spleen, and kidney after inoculation. RESULTS: The LM-Δrli60 strain had a significantly higher adhesion rate and lower invasion rate with significantly lower intracellular survival and proliferation rates in the RAW264.7 cell line, compared to the LM EGD-e strain. Inoculation with LM-Δrli60 strain significantly affected the transcription of virulence genes. The LD50 of LM-Δrli60 to BALB/c mouse was increased by 2.12 logarithmic magnitude, which indicated that the virulence in LM-Δrli60 is significantly decreased (p < 0.05). The amount of LM-Δrli60 in the liver and spleen was significantly lower than the amount of LM EGD-e in these organs (p < 0.05). The pathological damage due to LM-Δrli60 infection in the mouse liver, spleen, and kidney was lower than the damage due to LM EGD-e infection. CONCLUSION: This study confirmed that the rli60 deletion could significantly affect LM virulence, adhesion, invasion, survival, and proliferation. This suggests that Rli60 has an important role in regulating LM virulence.


Asunto(s)
Adhesión Bacteriana/genética , Riñón/microbiología , Listeria monocytogenes/genética , Listeria monocytogenes/patogenicidad , Hígado/microbiología , Bazo/microbiología , Animales , Línea Celular , Eliminación de Gen , Riñón/patología , Listeria monocytogenes/crecimiento & desarrollo , Listeriosis/microbiología , Hígado/patología , Macrófagos/microbiología , Ratones , Ratones Endogámicos BALB C , ARN no Traducido/genética , Bazo/patología , Virulencia/genética
8.
Neurosci Lett ; 477(1): 19-22, 2010 Jun 14.
Artículo en Inglés | MEDLINE | ID: mdl-20399249

RESUMEN

A series of 69 Han Chinese PD patients (including 66 index cases and 3 relatives) with early-onset Parkinson's disease (EOPD) were studied to assess the frequency of parkin and PINK1 gene mutations. Mutation analysis of the parkin gene was performed by real-time quantitative polymerase chain reaction (QPCR), denaturing high-performance liquid chromatography (DHPLC) and DNA sequencing. For the PINK1 gene, DHPLC and DNA sequencing were used. Nineteen patients (including one relative) had mutation in the parkin gene, and the c.2T > C (p.M1T) was not reported previously. No mutation of the PINK1 gene was found. The onset age of the patients with mutations in the parkin was earlier than that of those without mutation (p < 0.05). We concluded that mutations in parkin gene are common in Chinese EOPD patients, and mainly are exon rearrangements, while mutation in PINK1 might be not common in Chinese EOPD patients.


Asunto(s)
Enfermedad de Parkinson/genética , Proteínas Quinasas/genética , Ubiquitina-Proteína Ligasas/genética , Adulto , Edad de Inicio , Pueblo Asiatico , China , Femenino , Estudios de Asociación Genética , Predisposición Genética a la Enfermedad , Humanos , Masculino , Persona de Mediana Edad , Mutación , Adulto Joven
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