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1.
Spectrochim Acta A Mol Biomol Spectrosc ; 322: 124842, 2024 Dec 05.
Artículo en Inglés | MEDLINE | ID: mdl-39032234

RESUMEN

In recent years, due to the abuse of antibiotics, nitro explosives and pesticides, which have caused great harm to the environment and human health, social concerns have prompted researchers to develop more sensitive detection platforms for these pollutants. In this paper, a novel two-dimensional Zn (II) coordination polymer, [Zn(L)0.5(1,2-bimb)]·DMF (1), [H4L=[1,1':4',1''-terphenyl]-2, 2'',4, 4'' -tetracarboxylic acid, 1,2-bimb = 1,2-bis(imidazol-1-ylmethyl)benzene] was synthesized using a hydro-solvothermal method. Among commonly used organic solvents, 1 exhibits significant stability. Fast and efficient fluorescence response can be achieved for tetracycline (TET), 4-nitrophenol (4-NP), fluazinam (FLU), and abamectin benzoate (AMB) with low detection limits. A binary intelligent logic gate device with FLU and AMB as chemical input signals is successfully constructed, which provides a new idea for biochemical detection. In addition, a portable visual test paper has been prepared, which has high sensitivity, good selectivity, and simple operation. It can be used for rapid detection of pollutants in daily life and has broad application prospects. Finally, a detailed discussion was conducted on the fluorescence sensing mechanism of 1 for detecting TET, 4-NP, AMB and FLU.


Asunto(s)
Nitrofenoles , Plaguicidas , Espectrometría de Fluorescencia , Tetraciclina , Nitrofenoles/análisis , Nitrofenoles/química , Tetraciclina/análisis , Plaguicidas/análisis , Espectrometría de Fluorescencia/métodos , Límite de Detección , Contaminantes Químicos del Agua/análisis , Zinc/análisis
2.
Biochem Pharmacol ; 217: 115847, 2023 11.
Artículo en Inglés | MEDLINE | ID: mdl-37804871

RESUMEN

Ovarian cancer (OC) is the most prevalent and deadly cancer of the female reproductive system. Women will continue to be impacted by OC-related morbidity and mortality. Despite the fact that chemotherapy with cisplatin is the main component as the first-line anticancer treatment for OC, chemoresistance and unfavorable side effects are important obstacles to effective treatment. Targets for effective cancer therapy are required for cancer cells but not for non-malignant cells because they are expressed differently in cancer cells compared to normal cells. Targets for cancer therapy should preferably be components that already exist in biochemical and signalling frameworks and that significantly contribute to the development of cancer or regulate the response to therapy. RLIP is an important mercapturic acid pathway transporter that is crucial for survival and therapy resistance in cancers, therefore, we examined the role of RLIP in regulating essential signalling proteins involved in relaying the inputs from upstream survival pathways and mechanisms contributing to chemo-radiotherapy resistance in OC. The findings of our research offer insight into a novel anticancer effect of RLIP depletion/inhibition on OC and might open up new therapeutic avenues for OC therapy.


Asunto(s)
Neoplasias Ováricas , Humanos , Femenino , Xenoinjertos , Neoplasias Ováricas/tratamiento farmacológico , Neoplasias Ováricas/patología , Transducción de Señal , Cisplatino/farmacología , Cisplatino/uso terapéutico , Línea Celular Tumoral , Resistencia a Antineoplásicos
3.
ACS Omega ; 8(27): 24635-24643, 2023 Jul 11.
Artículo en Inglés | MEDLINE | ID: mdl-37457463

RESUMEN

A Cd-based metal-organic framework (Cd-MOF), named after {[Cd(ttc)(H2O)]·H2O}n (ttc = 1-imidazole-1-yl-2,4,6-benzene-tricarboxylic acid), was synthesized using the solvothermal reaction. The single-crystal structure was determined by single X-ray diffraction analysis, and crystalline characteristics and composition were confirmed by powder X-ray diffraction (PXRD) and thermogravimetric analysis (TG), respectively. Structural analysis showed that the Cd2+ ion is in the seven-coordinated mode, in which ttc2- ion adopts the µ4-η1-η1-η2-η2 coordination mode. It is worth noting that the Cd2+ ion is connected to ttc2- to form a 2D network, and the adjacent 2D network is expanded into a 3D supramolecular network structure through weak hydrogen bonds. The fluorescence sensing experiments indicated that Cd-MOF could not only be used as a fluorescence sensor for Fe3+, fluazinam (FLU), and 2,4,6-trinitrophenolol (TNP) but also for sulfasalazine detection in aqueous solution. To verify the sensitivity of the fluorescent probe, we calculated its detection limit: 5.34 × 10-8 M (Fe3+), 7.8 × 10-8 M (FLU), 1.21 × 10-7 M (TNP), and 2.67 × 10-7 M (SECT). In addition, the quenching mechanism was thoroughly studied.

4.
Talanta ; 259: 124491, 2023 Jul 01.
Artículo en Inglés | MEDLINE | ID: mdl-37023672

RESUMEN

The construction of sensors with specific recognition functions can easily, sensitively and efficiently detect heavy metal ions, which is a demand in the field of electrochemical sensing and an important topic in the detection of environmental pollutants. An electrochemical sensor based on MOFs composites was developed for sensing of multiplex metal ions. The large surface area, adjustable porosities and channels in MOFs facilitate successful loading of sufficient quantities highly active units. The active units and pore structures of MOFs are regulated and synergetic with each other to enhance the electrochemical activity of MOFs composites. Thus, the selectivity, sensitivity and reproducibility of MOFs composites have been improved. Fortunately, after characterization, Fe@YAU-101/GCE sensor with strong signal was successfully constructed. In the presence of target metal ions in solution, the Fe@YAU-101/GCE can efficiently and synchronously identify Hg2+, Pb2+, and Cd2+. The detection limits (LOD) are 6.67 × 10-10 M(Cd2+), 3.33 × 10-10 M(Pb2+) and 1.33 × 10-8 M (Hg2+), and are superior to the permissible limits set by the National Environmental Protection Agency. The electrochemical sensor is simple without sophisticated instrumentation and testing processes, hence promising for practical applications.

5.
Am J Clin Oncol ; 46(5): 219-224, 2023 05 01.
Artículo en Inglés | MEDLINE | ID: mdl-36877193

RESUMEN

BACKGROUND: The aim was to build a risk scoring system to guide the adjuvant treatment for early-stage cervical cancer patients with pelvic lymph node (LN) metastases after surgery. METHODS: A cohort of 1213 early-stage cervical cancer patients with pelvic LN metastases (T1-2aN1M0) were selected from the NCI SEER database, of which 1040 patients received adjuvant external beam radiotherapy concurrent with chemotherapy (EBRT+Chemo) and 173 patients received adjuvant chemotherapy alone. The Cox regression analysis was applied to identify the risk factors associated with worse survival. The exp (ß) of each independent risk factors from multivariate analysis was assigned to develop the risk scoring system. The total cohort was divided into different risk subgroups accordingly and the efficacy of different adjuvant modalities in each risk subgroups was compared. RESULTS: The patients were divided into 3 risk subgroups (Low-risk: total score <7.20, Middle-risk:7.20≤ total score≤ 8.40, High-risk: total score<8.40) based on the scoring system incorporating 5 independent risk factors. The survival analysis suggested that low-risk (hazard ratio [HR]=1.046, 95% CI: 0.586-1.867; P= 0.879) and middle-risk patients (HR=0.709, 95% CI: 0.459-1.096; P =0.122) could not benefit more from EBRT+Chemo than Chemo alone. However, EBRT+Chemo remained the superiority to Chemo alone in the high-risk subgroup (HR=0.482, 95% CI: 0.294-0.791; P =0.003). CONCLUSION: A risk scoring system has been built to direct the adjuvant treatment for early-stage cervical cancer patients with pelvic LN metastases after surgery, where Chemo alone was totally enough for low-risk and middle-risk patients stratified by the model while EBRT+Chemo was still recommended for patients in the high-risk subgroup.


Asunto(s)
Neoplasias del Cuello Uterino , Femenino , Humanos , Radioterapia Adyuvante , Neoplasias del Cuello Uterino/patología , Metástasis Linfática/patología , Estadificación de Neoplasias , Quimioterapia Adyuvante , Ganglios Linfáticos/patología , Histerectomía , Estudios Retrospectivos
6.
J Perianesth Nurs ; 38(3): 434-439, 2023 06.
Artículo en Inglés | MEDLINE | ID: mdl-36624000

RESUMEN

PURPOSE: Postoperative pain is one of the most common postoperative complications, and improper management not only adds to patient suffering but also affects patients' recovery. In this study, we measured patients' postoperative pain to understand the status of patients after surgery and to identify factors influencing postoperative pain. DESIGN: A descriptive and cross-sectional study METHODS: This survey was conducted at a large tertiary hospital in Chengdu, Sichuan Province. A total of 655 postoperative inpatients were included. The survey was conducted using the Chinese version of the Houston Pain Outcome Instrument. General patient data, pain management-related factors, and the pain management index were used to survey risk factors. We used t-tests and ANOVA for univariate analysis of each pain outcome category to explore the association with the predictor variables. Then, those variables with a significance level of 0.05 on univariate analysis were entered into multivariable regression analysis to identify parsimonious subsets of independent risk factors. FINDINGS: In this survey, 58.7% of patients experienced moderate to severe pain in the 24-hour postoperative period, and 33.6% of patients had moderate to severe average pain over the 24-hour postoperative period. The postoperative pain impact scores on patient mood, somatic function, patient satisfaction with postoperative pain management, and pain education were 3.5 ± 2.1, 4.3 ± 3.1, 8.9 ± 1.4 and 8.2 ± 1.8, respectively. The pain management index, surgery type, insurance, and pain assessment of nurse were influential factors of postoperative pain intensity. Age, ethnicity, insurance, surgery type, patents' knowledge of pain, and pain assessment of the nurse affected the patients' postoperative physiological function (F = 3.822, R2 = 0.065, P = .000). In addition, area of residence and physician attitudes affected the outcomes of patient satisfaction with pain management (F = 26.652, R2 = 0.259, P = .000). CONCLUSIONS: The incidence of moderate to severe pain in post-surgical patients remains high, and postoperative pain affects patients physically and psychologically. Special attention should be given to patients with lower income and literacy levels.


Asunto(s)
Manejo del Dolor , Dolor Postoperatorio , Humanos , Estudios Transversales , Dolor Postoperatorio/epidemiología , Satisfacción del Paciente , Hospitales
7.
Eur J Surg Oncol ; 49(2): 475-480, 2023 02.
Artículo en Inglés | MEDLINE | ID: mdl-36114049

RESUMEN

BACKGROUND: To develop a risk scoring system to tailor the adjuvant treatment for stage IIIC EC patients after surgery. METHODS: Data source was from the Surveillance, Epidemiology, and End Results (SEER) registry, where 3251 post-operative stage IIIC EC patients with different adjuvant treatment were included. Cox regression analysis was used to identify risk factors. The exp (ß) of each independent risk factors generating from the cox analysis was used to construct the risk scoring system, which was further utilized to divide the patients into different risk subgroups and the efficacy of different adjuvant modalities in each risk subgroups would be compared accordingly. RESULTS: Six independent risk factors were identified to develop the scoring system, which further divided the patients into three risk subgroups based on the total risk score (Low-risk≤8.46, 8.47 ≤ Middle-risk≤9.94, High-risk≥9.95). This study revealed that CRT was not superior to RT alone (HR:1.208, 95%CI: 0.852-1.741; P = 0.289) or CT alone (HR:1.260, 95%CI: 0.750-2.116; P = 0.382) in Low-risk subgroup. We also observed that CRT had a survival advantage over other treatment modalities in the Middle-risk subgroup (All P < 0.001), but CRT and CT alone to be superimposable in the High-risk subgroup (HR: 1.395, 95%CI: 0.878-2.216; P = 0.159). CONCLUSION: A risk scoring system has been developed to tailor the adjuvant treatment for stage IIIC EC patients after surgery, where RT or CT alone could be a substitute for CRT in Low-risk patients and CT alone was a potential alternative for High-risk patients while CRT remained to be the optimal choice for the Middle-risk patients.


Asunto(s)
Quimioradioterapia Adyuvante , Neoplasias Endometriales , Femenino , Humanos , Radioterapia Adyuvante/métodos , Estadificación de Neoplasias , Neoplasias Endometriales/patología , Quimioterapia Adyuvante , Factores de Riesgo
8.
Spectrochim Acta A Mol Biomol Spectrosc ; 285: 121894, 2023 Jan 15.
Artículo en Inglés | MEDLINE | ID: mdl-36152506

RESUMEN

Due to the indiscriminate abuse of pesticides and antibiotics has caused serious threats to the environment and human and animal bodies, the detection of antibiotics and pesticides has attracted widespread attention in recent years. Herein, a novel 2D Cd (II)-MOF, [Cd(L)0.5(1,2-bimb)] (Cd-L-1,2-bimb), [H4L = 1, 1'-ethylbiphenyl -3, 3', 5, 5'- tetracarboxylic acid, 1, 2-bimb = 1, 2-bis[(1H-imidazol-1-yl) methyl] benzene] is synthesized. Cd-L-1,2-bimb has excellent stability in different organic solvents and in the range of pH 1.1-12.5. Cd-L-1,2-bimb exhibits high selectivity, high sensitivity, and fast luminescent response to pesticides [pyrimethanil (PTH, LOD = 2.2 µM) and abamectin benzoate (AMB, LOD = 2.39 µM)] and antibiotic contaminants tetracycline (TET, LOD = 0.13 µM). Cd-L-1,2-bimb displays discriminative fluorescence when detecting AMB and PTH, and is an implication logic gate. Finally, the possible detection mechanism of Cd-L-1,2-bimb toward different pollutants is also further investigated. This MOF-based multifunctional sensor opens up new prospects for environmental monitors.


Asunto(s)
Estructuras Metalorgánicas , Plaguicidas , Humanos , Cadmio , Agua , Benzoatos , Tetraciclina , Antibacterianos/análisis
9.
BMC Cancer ; 22(1): 924, 2022 Aug 26.
Artículo en Inglés | MEDLINE | ID: mdl-36028793

RESUMEN

AIM: To translate and validate the Chinese version of the MDASI-THY among thyroid cancer patients. BACKGROUND: The M.D. Anderson Symptom Inventory-Thyroid Cancer module (MDASI-THY) is one of well-validated instruments for thyroid-specific symptom assessment. To date, the instrument has not been used in China. METHODS: After standard forward- and back-translation procedures, two instruments, the Chinese version of MDASI-THY and the European Organization for Research and Treatment of Cancer QLQ C30, were answered by 309 thyroid patients. The content, convergent discriminant validity and reliability of the MDASI-THY were evaluated. RESULTS: The scale of content validity index (S-CVI) and the item of content validity index (I-CVI) of the instrument were over 0.80. There were significant relationships between MDASI-THY and EORTC QLQ-C30 (r range, 0.139 ~ 0.766, -0.759 ~ -0.461, p < 0.001). Symptoms were severer for patients underwent surgical treatment (Z = -9.999, p < 0.001). The Cronbach's alpha was 0.966 (between 0.954 and 0.827 for subscales). Most symptom items had moderate to high interitem correlations (r range, 0.297 ~ 0.773). CONCLUSIONS: The Chinese version of MDASI-THY demonstrated favorable validity and reliability. It can be used in development of symptom management program in thyroid cancer patients in China. RELEVANCE TO CLINICAL PRACTICE: Healthcare providers can apply this instrument to assess Chinese thyroid cancer patients to increase the understanding of their symptom experience, resulting in a better symptom management.


Asunto(s)
Neoplasias de la Tiroides , Traducciones , Estudios Transversales , Humanos , Psicometría , Calidad de Vida , Reproducibilidad de los Resultados , Índice de Severidad de la Enfermedad , Encuestas y Cuestionarios
10.
Plant Sci ; 315: 111145, 2022 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-35067308

RESUMEN

Flowering time (or heading date in crops) is a critical agronomic trait for rice reproduction and adaptation. The circadian clock is an endogenous oscillator that is involved in controlling photoperiodic flowering. The rice LATE ELONGATED HYPOCOTYL (OsLHY), the core oscillator component of circadian clock, is a homolog of the LHY/CCA1 in Arabidopsis. Here we showed that CRISPR/Cas9-engineered mutations in OsLHY caused late flowering in rice only under natural long-day (nLD) and short-day (nSD) conditions, but not artificial SD (10 h light/14 h dark) conditions. In the oslhy mutant, the diurnal expression of circadian clock-related genes was seriously affected under both LD and SD conditions. Furthermore, the expression of the flowering activators Ehd1, Hd3a and RFT1 was down-regulated and flowering repressors Hd1 and Ghd7 was up-regulated in the oslhy mutant under LD conditions. While the transcripts of flowering-related genes were not dramatically influenced under SD conditions. Dual-luciferase assays showed that OsLHY repressed the transcription of OsGI, Hd1, Ghd7, Hd3a, RFT1 and OsELF3, and activated the transcription of Ehd1. Moreover, the yeast one hybrid assay and electrophoretic mobility shift assay confirmed that OsLHY directly repressed OsGI, RFT1 and OsELF3 by binding to their promoters, which is consistent with that in Arabidopsis. These results suggested that the OsLHY can promote rice flowering mainly through regulating Hd1 and Ehd1.


Asunto(s)
Ritmo Circadiano/fisiología , Flores/crecimiento & desarrollo , Flores/genética , Oryza/crecimiento & desarrollo , Oryza/genética , Oryza/metabolismo , Proteínas de Plantas/genética , Proteínas de Plantas/metabolismo , China , Ritmo Circadiano/genética , Productos Agrícolas/genética , Productos Agrícolas/crecimiento & desarrollo , Productos Agrícolas/metabolismo , Regulación de la Expresión Génica de las Plantas , Genes de Plantas , Redes y Vías Metabólicas/genética , Fotoperiodo
11.
Spectrochim Acta A Mol Biomol Spectrosc ; 265: 120340, 2022 Jan 15.
Artículo en Inglés | MEDLINE | ID: mdl-34492511

RESUMEN

A highly stable heterometallic MOF, {[(Me2NH2)2]·[Cd2K2(L)2(H2O)]}n (H4L = terphenyl-2, 2', 4, 4'-tetracarboxylic acid) (1), was synthesized. 1 featuring one-dimensional channels can efficiently detect Aspartic acid with a low limit of detection (LOD) value (2.5 µM). More interestingly, 1 can encapsulate Eu3+ and sensitize the visible-emitting characteristic fluorescence of Eu3+ in aqueous solution. Then, Eu3+@CdK-MOF is found to be an excellent fluorescence sensor for the detection of Ornidazole (ODZ) and the portable ODZ test paper is also successfully designed. Eu3+@CdK-MOF can also be used as fluorescent ink to write some words. The words can be hidden when treated with acid vapor and then the words can be restored when treated with alkaline vapor. More importantly, the hidden information can be read repeatedly. Therefore, this reversible light-emitting and reusable property have great potential for development in information encryption and decryption and information storage.


Asunto(s)
Estructuras Metalorgánicas , Ornidazol , Ácido Aspártico , Cadmio , Límite de Detección
12.
Spectrochim Acta A Mol Biomol Spectrosc ; 269: 120752, 2022 Mar 15.
Artículo en Inglés | MEDLINE | ID: mdl-34929630

RESUMEN

A stable luminescent Cd-MOF, formulated as [Cd(L)0.5(4, 4'-bpy)0.5]·H2O (1), (H4L = 1, 1'-ethylbiphenyl -3, 3', 5, 5'- tetracarboxylic acid, 4, 4' -bpy = 4, 4'-bipyridine), is acquired under solvothermal conditions. 1 exhibits stability in the pH range from 1.5 to 12.2 and in different organic solvents. 1 can detect tetracycline and nitrobenzene by fluorescence quenching with high sensitivity and selectivity. The detection limits are 0.14 µM and 14 nM, respectively. Interestingly, 1 can encapsulate Tb3+ and sensitize its characteristic peaks. Moreover, the fluorescent ink is prepared by using the luminescent properties of the Tb3+@Cd-MOF. The light of the fluorescent ink disappears in an acid gas HCl atmosphere and then reappears in an alkaline gas ammonia atmosphere. This phenomenon can be repeated and the reason for this phenomenon is also explained in the article. Therefore, Tb3+@Cd-MOF has huge application potential in information encryption.


Asunto(s)
Cadmio , Tetraciclina , Antibacterianos , Luminiscencia , Nitrobencenos
13.
Bioengineered ; 12(1): 7432-7445, 2021 12.
Artículo en Inglés | MEDLINE | ID: mdl-34605340

RESUMEN

Bruton's tyrosine kinase (BTK) is involved in the diabetogenic process and cerebral ischemic injury. However, it remained unclear whether BTK inhibition has remedial effects on ischemia/reperfusion (I/R) injury complicated with diabetes. We aim to investigate the regulatory role and potential mechanism of ibrutinib, a selective inhibitor of BTK, in cerebral I/R injured diabetic mice. The cytotoxicity and cell vitality tests were performed to evaluate the toxic and protective effects of ibrutinib at different incubating concentrations on normal PC12 cells or which were exposed to high glucose for 24 h, followed by hypoxia and reoxygenation (H/R), respectively. Streptozotocin (STZ) stimulation-induced diabetic mice were subjected to 1 h ischemia and then reperfusion. Then the diabetic mice received different dosages of ibrutinib or vehicle immediately and 24 h after the middle cerebral artery occlusion (MCAO). The behavioral, histopathological, and molecular biological tests were then performed to demonstrate the neuroprotective effects and mechanism in I/R injured diabetic mice. Consequently, Ibrutinib improved the decreased cell viability and attenuated oxidative stress in the high glucose incubated PC12 cells which subjected to H/R injury. In the I/R injured diabetic mice, ibrutinib reduced the cerebral infarct volume, improved neurological deficits, ameliorated pathological changes, and improved autophagy in a slightly dose-dependent manner. Furthermore, the expression of PI3K/AKT/mTOR pathway-related proteins were significantly upregulated by ibrutinib treatment. In summary, our finding collectively demonstrated that Ibrutinib could effectively ameliorate cerebral ischemia/reperfusion injury via ameliorating inflammatory response, oxidative stress, and improving autophagy through PI3K/Akt/mTOR signaling pathway in diabetic mice.


Asunto(s)
Adenina/análogos & derivados , Autofagia/efectos de los fármacos , Isquemia Encefálica/metabolismo , Diabetes Mellitus Experimental/metabolismo , Piperidinas/farmacología , Daño por Reperfusión/metabolismo , Adenina/farmacología , Animales , Masculino , Ratones , Ratones Endogámicos C57BL , Fármacos Neuroprotectores/farmacología , Fosfatidilinositol 3-Quinasas/metabolismo , Proteínas Proto-Oncogénicas c-akt/metabolismo , Transducción de Señal/efectos de los fármacos , Serina-Treonina Quinasas TOR/metabolismo
14.
Front Plant Sci ; 12: 745526, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34650583

RESUMEN

Active transposable elements (TEs) have drawn more attention as they continue to create new insertions and contribute to genetic diversity of the genome. However, only a few have been discovered in rice up to now, and their activities are mostly induced by artificial treatments (e.g., tissue culture, hybridization etc.) rather than under normal growth conditions. To systematically survey the current activity of TEs in natural rice accessions and identify rice accessions carrying highly active TEs, the transposon insertion polymorphisms (TIPs) profile was used to identify singleton insertions, which were unique to a single accession and represented the new insertion of TEs in the genome. As a result, 10,924 high-confidence singletons from 251 TE families were obtained, covering all investigated TE types. The number of singletons varied substantially among different superfamilies/families, perhaps reflecting distinct current activity. Particularly, eight TE families maintained potentially higher activity in 3,000 natural rice accessions. Sixty percent of rice accessions were detected to contain singletons, indicating the extensive activity of TEs in natural rice accessions. Thirty-five TE families exhibited potentially high activity in at least one rice accession, and the majority of them showed variable activity among different rice groups/subgroups. These naturally active TEs would be ideal candidates for elucidating the molecular mechanisms underlying the transposition and activation of TEs, as well as investigating the interactions between TEs and the host genome.

15.
Cancers (Basel) ; 13(17)2021 Aug 24.
Artículo en Inglés | MEDLINE | ID: mdl-34503075

RESUMEN

CA-125, encoded by the MUC16 gene, is highly expressed in most ovarian cancer cells and thus serves as a tumor marker for monitoring disease progression or treatment response in ovarian cancer patients. However, targeting MUC16/CA-125 for ovarian cancer treatment has not been successful to date. In the current study, we performed multiple steps of high-fidelity PCR and obtained a 5 kb DNA fragment upstream of the human MUC16 gene. Reporter assays indicate that this DNA fragment possesses transactivation activity in CA-125-high cancer cells, but not in CA-125-low cancer cells, indicating that the DNA fragment contains the transactivation region that controls specific expression of the MUC16 gene in ovarian cancer cells. We further refined the promoter and found a 1040 bp fragment with similar transcriptional activity and specificity. We used this refined MUC16 promoter to replace the E1A promoter in the adenovirus type 5 genome DNA, where E1A is an essential gene for adenovirus replication. We then generated a conditionally replicative oncolytic adenovirus (CRAd) that replicates in and lyses CA-125-high cancer cells, but not CA-125-low or -negative cancer cells. In vivo studies showed that intraperitoneal virus injection prolonged the survival of NSG mice inoculated intraperitoneally (ip) with selected ovarian cancer cell lines. Furthermore, the CRAd replicates in and lyses primary ovarian cancer cells, but not normal cells, collected from ovarian cancer patients. Collectively, these data indicate that targeting MUC16 transactivation utilizing CRAd is a feasible approach for ovarian cancer treatment that warrants further investigation.

16.
Hortic Res ; 7: 145, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32922817

RESUMEN

Brassica oleracea comprises various economically important vegetables and presents extremely diverse morphological variations. They provide a rich source of nutrition for human health and have been used as a model system for studying polyploidization. Transposable elements (TEs) account for nearly 40% of the B. oleracea genome and contribute greatly to genetic diversity and genome evolution. Although the proliferation of TEs has led to a large expansion of the B. oleracea genome, little is known about the population dynamics and evolutionary activity of TEs. A comprehensive mobilome profile of 45,737 TE loci was obtained from resequencing data from 121 diverse accessions across nine B. oleracea morphotypes. Approximately 70% (32,195) of the loci showed insertion polymorphisms between or within morphotypes. In particular, up to 1221 loci were differentially fixed among morphotypes. Further analysis revealed that the distribution of the population frequency of TE loci was highly variable across different TE superfamilies and families, implying a diverse expansion history during host genome evolution. These findings provide better insight into the evolutionary dynamics and genetic diversity of B. oleracea genomes and will potentially serve as a valuable resource for molecular markers and association studies between TE-based genomic variations and morphotype-specific phenotypic differentiation.

17.
Front Oncol ; 10: 1118, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32766144

RESUMEN

Quinacrine has been identified as a potent DR5-inducing agent that sensitizes cancer cells to TRAIL-induced apoptosis. In the current study, we found that quinacrine increased DR5 mRNA levels significantly in ovarian cancer cell lines regardless of p53 status. Further study showed the half-life of DR5 in quinacrine-treated cells was significantly prolonged, indicating that DR5 protein degradation was inhibited by quinacrine. We tested if the combination of TRAIL and quinacrine could be effective in ovarian cancer treatment in vitro and in ovarian cancer xenograft mouse models. We found that quinacrine enhanced TRAIL sensitivity or reversed TRAIL resistance in all the ovarian cancer cell lines tested. Mice treated with quinacrine and TRAIL remained disease-free for up to 20 weeks, however, mice treated with TRAIL or quinacrine alone and in control group died within ~8 weeks after treatment. Intraperitoneal delivery of quinacrine and TRAIL is rational and practical with extraordinary synergistic anti-cancer effects in preclinical models of ovarian cancer. Clinical investigation of combining quinacrine with TRAIL for ovarian cancer treatment is warranted.

18.
Int J Cardiol ; 307: 137-145, 2020 05 15.
Artículo en Inglés | MEDLINE | ID: mdl-31870781

RESUMEN

BACKGROUND: Myocardial infarction (MI) is the most common cause of cardiovascular morbidity and mortality worldwide. Despite the identification of many pathogenic genes associated with MI, the underlying molecular mechanisms remain poorly understood. MicroRNAs (miRNAs, miRs), which regulate target genes at the post-transcriptional level, play a significant role in the regulation of cardiovascular diseases such as MI. Pyroptosis is a caspase-1-dependent pro-inflammatory programmed cell death (PCD) mechanism. The role of pyroptosis in several diseases associated with various miRNAs has been studied extensively. Meanwhile, the role of NOD-like receptor-containing pyrin 3 (NLRP3)/caspase-1/interleukin-1ß (IL-1ß) pathway in cardiac diseases has also been more recognized. METHODS: We established a mice MI model which ligated with the left anterior descending coronary artery and a cardiomyocytes injury model treated by hydrogen peroxide (H2O2) to detect the expressions of miR-135b and NLRP3/caspase-1/IL-1ß pathway. Then miR-135b mimic, agomir-135b, and α-MHC-miR-135b transgenic mice were used to evaluate the effects of miR-135b overexpression. RESULT: We demonstrated that miR-135b was downregulated after cardiomyocytes injury both in vivo and in vitro. Pyroptosis pathway was also activated. MiR-135b overexpression remarkably restored impaired cardiac function and attenuated the upregulation of NLRP3/caspase-1/IL-1ß pathway. CONCLUSIONS: The present findings shed light on the protective role of miR-135b in MI mediated by the inhibition of the NLRP3/caspase-1/IL-1ß pathway.


Asunto(s)
Caspasa 1 , Infarto/prevención & control , Interleucina-1beta , MicroARNs , Miocitos Cardíacos , Proteína con Dominio Pirina 3 de la Familia NLR , Animales , Caspasa 1/genética , Peróxido de Hidrógeno , Ratones , MicroARNs/genética , Proteína con Dominio Pirina 3 de la Familia NLR/genética
19.
World J Clin Cases ; 8(24): 6487-6498, 2020 Dec 26.
Artículo en Inglés | MEDLINE | ID: mdl-33392335

RESUMEN

BACKGROUND: Acquired prosopagnosia is a rare condition characterized by the loss of familiarity with previously known faces and the inability to recognize new ones. It usually occurs after the onset of brain lesions such as in a stroke. The initial identification of prosopagnosia generally relies on a patient's self-report, which can be challenging if it lacks an associated chief complaint. There were few cases of prosopagnosia presenting purely as eye symptoms in the previous literature confirmed by functional magnetic resonance imaging (MRI). CASE SUMMARY: We present a case of delayed diagnosis of prosopagnosia after a right hemisphere stroke in an elderly man whose chief complaint was persistent and progressive "blurred vision" without facial recognition impairment. Ophthalmic tests revealed a homonymous left upper quadrantanopia, with normal visual acuity. He was found by accident to barely recognize familiar faces. The patient showed severe deficit in face recognition and perception tests, and mild memory loss in neuropsychological assessments. Further functional MRI revealed the visual recognition deficits were face-specific. After behavioral intervention, the patient started to rely on other cues to compensate for poor facial recognition. His prosopagnosia showed no obvious improvement eight months after the stroke, which had negative impact on his social network. CONCLUSION: Our case demonstrates that the presentation of prosopagnosia can be atypical, and visual difficulties might be a clinical manifestation solely of prosopagnosia, which emphasizes the importance of routinely considering face recognition impairment among elderly patients with brain lesions.

20.
Front Pharmacol ; 11: 593633, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-33603662

RESUMEN

Diabetic cardiomyopathy (DCM) is one of the major causes of death in diabetic patients. Its pathogenesis involves inflammation and fibrosis that damages the heart tissue and impairs cardiac function. Interleukin (IL)-17, a pro-inflammatory cytokine that plays an important role in a variety of chronic inflammatory processes can serve as an attractive therapeutic target. Anthocyanin, a water-soluble natural pigment, possesses impressive anti-inflammatory activity. However, its role in DCM is unclear. Hence, we investigated the protective effect of anthocyanin on the cardiovascular complications of diabetes using a mouse type 1 diabetes mellitus model induced by streptozotocin. Cardiac function and structural alterations in diabetic mice were tested by echocardiography, hematoxylin and eosin staining, and Masson trichrome staining. Immunohistochemistry was performed to evaluate the distribution and deposition of IL-17 and collagen I and III from the left ventricular tissues of diabetic mice. Cell viability was measured using the methyl thiazolyl tetrazolium assay. Protein levels of IL-17, tumor necrosis factor α, IL-1ß, and IL-6 were determined using enzyme-linked immunosorbent assay. IL-17 and collagen I and III were detected by western blotting and immunofluorescence, and their mRNA levels were quantified using quantitative reverse transcription PCR. We observed that anthocyanin lowered blood glucose, improved cardiac function, and alleviated inflammation and fibrosis in the heart tissue of diabetic mice. Meanwhile, anthocyanin reduced the expression of IL-17 in high-glucose-treated cardiac fibroblasts and exhibited an anti-inflammatory effect. Deposition of collagen I and III was also decreased by anthocyanin, suggesting that anthocyanin contributes to alleviating myocardial fibrosis. In summary, anthocyanin could protect cardiac function and inhibit IL-17-related inflammation and fibrosis, which indicates its therapeutic potential in the treatment of diabetes mellitus-related complications.

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