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1.
J Med Virol ; 96(2): e29444, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-38294040

RESUMEN

To examine the association between cytomegalovirus (CMV) seropositivity and all-cause mortality in a nationwide cohort of US adults. We obtained data from the National Health and Nutrition Examination Survey III (1988-1994), including 16,547 participants aged 18-90 years old with CMV serology assessments. Mortality status was ascertained until December 2019 using the National Death Index linkage data. The Cox proportional hazard model was applied to estimate the association between CMV seropositivity and mortality. During a median follow-up of 26.3 years, 6,930 deaths were recorded. CMV seropositivity was associated with a higher hazard of all-cause mortality after adjusting for attained age, sex, and ethnicity (HR: 1.22, 95% CI: 1.10, 1.36, p < 0.001). The magnitude of the association attenuated slightly after adjusting further for body mass index, family income, smoking status, diabetes, and self-reported cancer history (HR = 1.11, 95% CI: 1.00, 1.23, p = 0.04). While the association was observed for both men and women, it was only statistically significant among non-Hispanic white people (HR: 1.16, 95% CI: 1.06, 1.26, p = 0.001) but not among other ethnic populations. CMV seropositivity might be an independent risk factor for all-cause mortality among US adults. If the findings are validated in an independent population, further research is needed to unveil the biological mechanisms driving the increased mortality with CMV seropositivity.


Asunto(s)
Infecciones por Citomegalovirus , Citomegalovirus , Adulto , Masculino , Humanos , Femenino , Adolescente , Adulto Joven , Persona de Mediana Edad , Anciano , Anciano de 80 o más Años , Estudios de Cohortes , Infecciones por Citomegalovirus/complicaciones , Infecciones por Citomegalovirus/epidemiología , Encuestas Nutricionales , Estudios Prospectivos
2.
Plant Physiol ; 192(2): 1483-1497, 2023 05 31.
Artículo en Inglés | MEDLINE | ID: mdl-36810650

RESUMEN

Glandular secretory trichomes (GSTs) can secrete and store a variety of specific metabolites. By increasing GST density, valuable metabolites can be enhanced in terms of productivity. However, the comprehensive and detailed regulatory network of GST initiation still needs further investigation. By screening a complementary DNA library derived from young leaves of Artemisia annua, we identified a MADS-box transcription factor, AaSEPALLATA1 (AaSEP1), that positively regulates GST initiation. Overexpression of AaSEP1 in A. annua substantially increased GST density and artemisinin content. The HOMEODOMAIN PROTEIN 1 (AaHD1)-AaMYB16 regulatory network regulates GST initiation via the jasmonate (JA) signaling pathway. In this study, AaSEP1 enhanced the function of AaHD1 activation on downstream GST initiation gene GLANDULAR TRICHOME-SPECIFIC WRKY 2 (AaGSW2) through interaction with AaMYB16. Moreover, AaSEP1 interacted with the JA ZIM-domain 8 (AaJAZ8) and served as an important factor in JA-mediated GST initiation. We also found that AaSEP1 interacted with CONSTITUTIVE PHOTOMORPHOGENIC 1 (AaCOP1), a major repressor of light signaling. In this study, we identified a MADS-box transcription factor that is induced by JA and light signaling and that promotes the initiation of GST in A. annua.


Asunto(s)
Artemisia annua , Tricomas , Tricomas/genética , Tricomas/metabolismo , Artemisia annua/genética , Artemisia annua/metabolismo , Factores de Transcripción/genética , Factores de Transcripción/metabolismo , Ciclopentanos/metabolismo , Proteínas de Plantas/genética , Proteínas de Plantas/metabolismo
3.
FASEB J ; 37(10): e23202, 2023 10.
Artículo en Inglés | MEDLINE | ID: mdl-37732633

RESUMEN

Trichinellosis caused by Trichinella spiralis (T. spiralis) is a major food-borne parasitic zoonosis worldwide. Prevention of trichinellosis is an effective strategy to improve patient quality of life. Macrophage migration inhibitory factor (MIF) is closely related to the occurrence and development of several parasitic diseases. Studying the impact of MIF deficiency (Mif-/- ) on the alterations in host fecal microbiota due to T. spiralis infection may contribute to proposing a novel dual therapeutic approach for trichinellosis. To reveal the diversity and differences in fecal microbial composition, feces were collected from T. spiralis-uninfected and T. spiralis-infected wild-type (WT) and MIF knockout (KO) C57BL/6 mice at 0, 7, 14, and 35 days post-infection (dpi), and the samples were sent for 16S rRNA amplicon sequencing on the Illumina NovaSeq platform. Flow cytometry was used to determine the expression levels of IFN-γ and IL-4 in the CD4+ /CD8+ T-cell sets of mouse spleens. The results showed that operational taxonomic unit (OTU) clustering, relative abundance of microbial composition, alpha diversity, and beta diversity exhibited significant changes among the eight groups. The LEfSe analysis selected several potential biomarkers at the genus or species level, including Akkermansia muciniphila, Lactobacillus murinus, Coprococcus catus, Firmicutes bacterium M10_2, Parabacteroides sp. CT06, and Bacteroides between the KTs and WTs groups. The predicted bacterial functions of the fecal microbiota were mainly involved in metabolism, such as the metabolism of carbohydrates, amino acids, energy, cofactors, vitamins, nucleotides, glycans, and lipids. Flow cytometry revealed an increased CD3+ CD8- /CD3+ CD8+ T-cell ratio and increased IFN-γ and IL-4 levels in CD3+ CD8- T-cell sets from WT and MIF KO mice at 7 dpi. The results indicated that both MIF KO and infection time have a significant influence on the CD3+ CD8- IFN-γ+ and CD3+ CD8- IL-4+ response in mice after T. spiralis. In conclusion, this research showed alterations of the fecal microbiota and immune response in both WT and MIF KO mice before and after T. spiralis infection. These results revealed a potential role of MIF in regulating the pathogenesis of trichinellosis related to the intestinal microbiota. Importantly, the selected potential biomarkers combined with MIF will also offer a novel therapeutic approach to treat trichinellosis in the future.


Asunto(s)
Factores Inhibidores de la Migración de Macrófagos , Microbiota , Trichinella spiralis , Triquinelosis , Animales , Humanos , Ratones , Interleucina-4 , Oxidorreductasas Intramoleculares , Factores Inhibidores de la Migración de Macrófagos/genética , Ratones Endogámicos C57BL , Calidad de Vida , ARN Ribosómico 16S/genética
4.
Plant Cell Rep ; 43(2): 45, 2024 Jan 23.
Artículo en Inglés | MEDLINE | ID: mdl-38261110

RESUMEN

KEY MESSAGE: A high-efficiency protoplast transient system was devised to screen genome editing elements in Salvia miltiorrhiza. Medicinal plants with high-value pharmaceutical ingredients have attracted research attention due to their beneficial effects on human health. Cell wall-free protoplasts of plants can be used to evaluate the efficiency of genome editing mutagenesis. The capabilities of gene editing in medicinal plants remain to be fully explored owing to their complex genetic background and shortfall of suitable transformation. Here, we took the Salvia miltiorrhiza as a representative example for developing a method to screen favorable gene editing elements with high editing efficiency in medical plants by a PEG-mediated protoplast transformation. Results indicated that using the endogenous SmU6.1 of S. miltiorrhiza to drive sgRNA and the plant codon-optimized Cas9 driven by the promoter SlEF1α can enhance the efficiency of editing. In summary, we uncover an efficacious transient method for screening editing elements and shed new light on increasing gene editing efficiency in medicinal plants.


Asunto(s)
Salvia miltiorrhiza , Humanos , Salvia miltiorrhiza/genética , Edición Génica , Protoplastos , ARN Guía de Sistemas CRISPR-Cas , Pared Celular
5.
J Integr Plant Biol ; 2024 Jul 09.
Artículo en Inglés | MEDLINE | ID: mdl-38980203

RESUMEN

The sesquiterpene lactone artemisinin is an important anti-malarial component produced by the glandular secretory trichomes of sweet wormwood (Artemisia annua L.). Light was previously shown to promote artemisinin production, but the underlying regulatory mechanism remains elusive. In this study, we demonstrate that ELONGATED HYPOCOTYL 5 (HY5), a central transcription factor in the light signaling pathway, cannot promote artemisinin biosynthesis on its own, as the binding of AaHY5 to the promoters of artemisinin biosynthetic genes failed to activate their transcription. Transcriptome analysis and yeast two-hybrid screening revealed the B-box transcription factor AaBBX21 as a potential interactor with AaHY5. AaBBX21 showed a trichome-specific expression pattern. Additionally, the AaBBX21-AaHY5 complex cooperatively activated transcription from the promoters of the downstream genes AaGSW1, AaMYB108, and AaORA, encoding positive regulators of artemisinin biosynthesis. Moreover, AaHY5 and AaBBX21 physically interacted with the A. annua E3 ubiquitin ligase CONSTITUTIVELY PHOTOMORPHOGENIC 1 (COP1). In the dark, AaCOP1 decreased the accumulation of AaHY5 and AaBBX21 and repressed the activation of genes downstream of the AaHY5-AaBBX21 complex, explaining the enhanced production of artemisinin upon light exposure. Our study provides insights into the central regulatory mechanism by which light governs terpenoid biosynthesis in the plant kingdom.

6.
Geriatr Nurs ; 57: 169-178, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38663185

RESUMEN

Due to China's aging population, there is a high demand for elderly care that is further exacerbated by the shortage of well-trained caregivers and high turnover rates in nursing homes, urgently requiring enhanced work engagement of caregivers. This study used structural equation modeling based on the survey data of Chinese caregivers in nursing homes to explore the association among income-welfare satisfaction, competency, professional identity, family support and work engagement. Findings indicated that (1) income-welfare satisfaction, competency, and professional identity all enhanced caregivers' work engagement, with professional identity being stronger. (2) Professional identity partially mediated the effects of income-welfare satisfaction and competency on work engagement, with higher values and shares of competency. (3) When family support was high, the positive effect of income-welfare satisfaction on professional identity was significant, and the mediating role of professional identity between income-welfare satisfaction and work engagement was moderated by family support.


Asunto(s)
Cuidadores , Casas de Salud , Humanos , Cuidadores/psicología , China , Masculino , Femenino , Encuestas y Cuestionarios , Persona de Mediana Edad , Compromiso Laboral , Adulto , Renta , Satisfacción en el Trabajo , Satisfacción Personal , Identificación Social , Anciano , Pueblos del Este de Asia
7.
Anal Chem ; 95(16): 6496-6500, 2023 04 25.
Artículo en Inglés | MEDLINE | ID: mdl-37061923

RESUMEN

Peroxynitrite (ONOO-) is one type of important reactive oxygen/nitrogen species (ROS/RNS) and plays a vital role in many physiological activities. Excessive ONOO- is associated with many diseases including inflammation, arthritis, inflammatory bowel disease, cancer, and neurodegenerative diseases. However, a chemiluminescent probe capable of detecting endogenous ONOO- at the acidic condition that might be applied for sensitive diagnosis of inflammation-related disease has not been reported. Hence, we designed and synthesized a chemiluminescence (CL) probe, B-PD, to detect endogenous ONOO- both in vitro and in vivo. B-PD demonstrated a quick response toward ONOO- with a limit of detection of 201 nM. In vivo CL imaging results showed that, 30 min postinjection, B-PD could effectively locate early stage inflammation tissue with an imaging contrast up to 6.2. These results suggest that B-PD holds great promise for highly sensitive diagnosis of inflammation-related diseases in the future.


Asunto(s)
Colorantes Fluorescentes , Ácido Peroxinitroso , Humanos , Diagnóstico por Imagen , Inflamación , Luminiscencia , Imagen Óptica , Especies Reactivas de Oxígeno , Mediciones Luminiscentes
8.
Anal Chem ; 95(38): 14165-14168, 2023 09 26.
Artículo en Inglés | MEDLINE | ID: mdl-37702743

RESUMEN

ß-Glucuronidase (GLU) is a hallmark enzyme for many malignant tumors, but bioluminescence (BL) probes that enable GLU imaging in vivo have not been reported. Herein, we rationally designed the BL probe Glc-Luc to address this issue. In vitro results demonstrated the specific responsiveness of Glc-Luc toward GLU with a calculated catalytic efficiency (kcat/Km) of 0.0109 µM-1 min-1 and a limit of detection (LOD) of 1.39 U/mL. Moreover, Glc-Luc rendered 3.1-fold and 15.9-fold higher BL intensities over the control groups in cell lysates and tumor-bearing mice, respectively. We anticipate that Glc-Luc could be further applied for the sensitive diagnosis of GLU-related diseases.


Asunto(s)
Glucuronidasa , Neoplasias , Animales , Ratones , Neoplasias/diagnóstico por imagen , Diagnóstico por Imagen , Catálisis , Pruebas Inmunológicas
9.
Anal Chem ; 95(39): 14511-14515, 2023 10 03.
Artículo en Inglés | MEDLINE | ID: mdl-37721425

RESUMEN

Photoacoustic (PA) imaging of urokinase-type plasminogen activator (uPA) activity in vivo holds high promise for early diagnosis of breast cancer. Molecular probes with resisted fluorescence (FL) emission for enhanced PA signals of uPA activity have not been reported. Herein, we proposed a molecular probe Cbz-Gly-Gly-Arg-Phe-Phe-IR775 (Z-GGRFF-IR775) which, upon uPA cleavage, assembled into nanoparticles FF-IR775-NP with quenched fluorescence but enhanced PA signals. Experimental results validated that, upon uPA activation, Z-GGRFF-IR775 exhibited 4.7-fold, 4.1-fold, and 2.9-fold higher PA signals over those in uPA inhibitor-treated control groups in vitro, in MDA-MB-231 cells, and in a tumor-bearing mouse model, respectively. We anticipate that this probe could be applied for highly sensitive PA imaging of uPA activity in early stage malignant tumors in the near future.


Asunto(s)
Neoplasias , Técnicas Fotoacústicas , Animales , Ratones , Activador de Plasminógeno de Tipo Uroquinasa , Diagnóstico por Imagen , Receptores del Activador de Plasminógeno Tipo Uroquinasa
10.
BMC Microbiol ; 23(1): 11, 2023 01 11.
Artículo en Inglés | MEDLINE | ID: mdl-36627553

RESUMEN

BACKGROUND: Glutathione is an important bioactive tripeptide and is widely used in the food, medicine, and cosmetics industries. The aim of this study was to provide an efficient method for producing GSH and to explore its synthesis mechanism. Saccharomyces cerevisiae strain HBSD-W08 was screened for GSH production, and its fermentation medium was optimized using single-factor experiments of the Plackett-Burman and central composite rotatable designs. This method was used to analyze the effects of the presence and concentration of various carbon sources, organic and inorganic nitrogen sources, metal ions, and precursor amino acids on GSH production and catalase, superoxide dismutase, and γ-glutamylcysteine synthetase activity. RESULTS: The three most significant factors affecting GSH production were peptone (optimal concentration [OC]: 2.50 g L- 1), KH2PO4 (OC: 0.13 g L- 1), and glutamic acid (OC: 0.10 g L- 1). GSH productivity of HBSD-W08 was obtained at 3.70 g L- 1 in the optimized medium. The activity of γ-GCS, which is a marker for oxidative stress, was found to be highly positively correlated with GSH production. CONCLUSIONS: This finding revealed an underlying relationship between GSH synthesis and oxidative stress, providing useful information for developing effective GSH fermentation control strategies.


Asunto(s)
Glutatión , Saccharomyces cerevisiae , Saccharomyces cerevisiae/metabolismo , Fermentación , Medios de Cultivo/metabolismo , Glutatión/metabolismo , Aminoácidos/metabolismo
11.
BMC Anesthesiol ; 23(1): 31, 2023 01 23.
Artículo en Inglés | MEDLINE | ID: mdl-36690942

RESUMEN

BACKGROUND: Perioperative hypothermia and shivering are common and can cause adverse outcomes. The aim of this study was to investigate the incidence of postoperative hypothermia and shivering and their risk factors in patients undergoing malignant tumor surgery. METHODS: This retrospective study collected data from patients with American Society of Anesthesiologists physical status (ASA) I or II who underwent scheduled surgery from November 2020 to March 2021 at Fudan University Shanghai Cancer Center. Each patient's core body temperature was measured at three time points: time point 1 (arrival at the postanesthesia care unit (PACU)), time point 2 (after 30-min care in the PACU), and time point 3 (at discharge from the PACU). At time point 1, if the patient's body temperature was below 36 ℃, we provided an active forced-air warmer. At time point 2, if it was still below 36 ℃, the forced-air warmer was still applied until the patient was discharged from the PACU. If it reached 36 ℃, the forced-air warmer would be switched off. Univariate and multivariate logistic regression combined with stepwise methods and linear regression were used to explore risk factors for postoperative hypothermia and shivering. RESULTS: The numbers (percentage) of 202 patients who developed postoperative hypothermia at the different time points were 52 (25.7%), 37 (18.3%) and 28 (13.9%). Eight patients (4.0%) experienced shivering. Multivariate logistic regression showed that high weight (OR = 0.923, 95% CI: 0.884 to 0.964, P = 0.0003) and low estimated blood loss (OR = 0.252, 95% CI: 0.115 to 0.550, P = 0.0005) were protective factors against hypothermia, while long surgical duration (OR = 3.339, 95% CI: 1.675 to 6.655, P = 0.0006) was an independent risk factor for hypothermia at time point 1. There was no risk factor associated with the occurrence of shivering (P > 0.05). There was a significant difference between the hypothermia and normothermia groups in the median length of stay in the PACU (59.0 vs. 49.0 min, P = 0.0123). CONCLUSIONS: Postoperative hypothermia occurred frequently. Weight, estimated blood loss and surgical duration were significantly associated with hypothermia on arrival at the PACU.


Asunto(s)
Hipotermia , Neoplasias , Humanos , Hipotermia/etiología , Estudios Retrospectivos , Tiritona , Incidencia , China , Temperatura Corporal
12.
Int J Mol Sci ; 24(16)2023 Aug 18.
Artículo en Inglés | MEDLINE | ID: mdl-37629108

RESUMEN

The plant Artemisia annua L. is famous for producing "artemisinin", which is an essential component in the treatment of malaria. The glandular secretory trichomes (GSTs) on the leaves of A. annua secrete and store artemisinin. Previous research has demonstrated that raising GST density can effectively raise artemisinin content. However, the molecular mechanism of GST initiation is not fully understood yet. In this study, we identified an MYB transcription factor, the AaMYB108-like, which is co-induced by light and jasmonic acid, and positively regulates glandular secretory trichome initiation in A. annua. Overexpression of the AaMYB108-like gene in A. annua increased GST density and enhanced the artemisinin content, whereas anti-sense of the AaMYB108-like gene resulted in the reduction in GST density and artemisinin content. Further experiments demonstrated that the AaMYB108-like gene could form a complex with AaHD8 to promote the expression of downstream AaHD1, resulting in the initiation of GST. Taken together, the AaMYB108-like gene is a positive regulator induced by light and jasmonic acid for GST initiation in A. annua.


Asunto(s)
Artemisia annua , Artemisininas , Artemisia annua/genética , Tricomas/genética
13.
New Phytol ; 233(1): 443-457, 2022 01.
Artículo en Inglés | MEDLINE | ID: mdl-34605025

RESUMEN

Phytophthora spp. cause serious damage to plants by exploiting a large number of effector proteins and small RNAs (sRNAs). Several reports have described modulation of host RNA biogenesis and defence gene expression. Here, we analysed Phytophthora infestans Argonaute (Ago) 1 associated small RNAs during potato leaf infection. Small RNAs were co-immunoprecipitated, deep sequenced and analysed against the P. infestans and potato genomes, followed by transcript analyses and transgenic assays on a predicted target. Extensive targeting of potato and pathogen-derived sRNAs to a range of mRNAs was observed, including 638 sequences coding for resistance (R) proteins in the host genome. The single miRNA encoded by P. infestans (miR8788) was found to target a potato alpha/beta hydrolase-type encoding gene (StABH1), a protein localized to the plasma membrane. Analyses of stable transgenic potato lines harbouring overexpressed StABH1 or artificial miRNA gene constructs demonstrated the importance of StABH1 during infection by P. infestans. miR8788 knock-down strains showed reduced growth on potato, and elevated StABH1 expression levels were observed when plants were inoculated with the two knock-down strains compared to the wild-type strain 88069. The findings of our study suggest that sRNA encoded by P. infestans can affect potato mRNA, thereby expanding our knowledge of the multifaceted strategies this species uses to facilitate infection.


Asunto(s)
MicroARNs , Phytophthora infestans , Solanum tuberosum , MicroARNs/genética , Phytophthora infestans/genética , Enfermedades de las Plantas/genética , ARN Mensajero/genética , Solanum tuberosum/genética
14.
J Appl Microbiol ; 132(5): 3937-3950, 2022 May.
Artículo en Inglés | MEDLINE | ID: mdl-35178822

RESUMEN

AIMS: To reveal the antibacterial mechanism of the combination of thymol and cinnamaldehyde to Listeria monocytogenes ATCC 19115 on autoclaved chicken breast. METHODS AND RESULTS: In this study, L. monocytogenes ATCC 19115 on autoclaved chicken breast was exposed to the stress of 125 µg/ml thymol and 125 µg/ml cinnamaldehyde, and transcriptome analysis was used to reveal the crucial antibacterial mechanism. According to the results, 1303 significantly differentially expressed genes (DEGs) were identified. Treated by thymol and cinnamaldehyde in combination, pyrimidine and branched-chain amino acid biosynthesis of L. monocytogenes were thwarted which impairs its nucleic acid biosynthesis and intracellular metabolism. The up-regulated DEGs involved in membrane composition and function contributed to membrane repair. Besides, pyruvate catabolism and TCA cycle were restrained which brought about the disturbance of amino acid metabolism. ABC transporters were also perturbed, for instance, the uptake of cysteine, D-methionine, and betaine was activated, while the uptake of vitamin, iron, and carnitine was repressed. Thus, L. monocytogenes tended to activate PTS, glycolysis, glycerol catabolism, and pentose phosphate pathways to obtain energy to adapt to the hostile condition. Noticeably, DEGs involved in virulence factors were totally down-regulated, including genes devoted to encoding flagella, chemotaxis, biofilm formation, internalin as well as virulence gene clusters. CONCLUSIONS: The combination of thymol and cinnamaldehyde is effective to reduce the survival and potential virulence of L. monocytogenes on autoclaved chicken breast. SIGNIFICANCE AND IMPACT OF STUDY: This work contributes to providing theoretical information for the application and optimization of thymol and cinnamaldehyde in ready-to-eat meat products to inhibit L. monocytogenes.


Asunto(s)
Listeria monocytogenes , Acroleína/análogos & derivados , Animales , Antibacterianos/farmacología , Pollos , Listeria monocytogenes/metabolismo , Timol/farmacología , Virulencia
15.
Sensors (Basel) ; 21(24)2021 Dec 09.
Artículo en Inglés | MEDLINE | ID: mdl-34960324

RESUMEN

With the rapid increase in encrypted traffic in the network environment and the increasing proportion of encrypted traffic, the study of encrypted traffic classification has become increasingly important as a part of traffic analysis. At present, in a closed environment, the classification of encrypted traffic has been fully studied, but these classification models are often only for labeled data and difficult to apply in real environments. To solve these problems, we propose a transferable model called CBD with generalization abilities for encrypted traffic classification in real environments. The overall structure of CBD can be generally described as a of one-dimension CNN and the encoder of Transformer. The model can be pre-trained with unlabeled data to understand the basic characteristics of encrypted traffic data, and be transferred to other datasets to complete the classification of encrypted traffic from the packet level and the flow level. The performance of the proposed model was evaluated on a public dataset. The results showed that the performance of the CBD model was better than the baseline methods, and the pre-training method can improve the classification ability of the model.

16.
Int J Mol Sci ; 22(8)2021 Apr 20.
Artículo en Inglés | MEDLINE | ID: mdl-33924042

RESUMEN

Degradome sequencing is commonly used to generate high-throughput information on mRNA cleavage sites mediated by small RNAs (sRNA). In our datasets of potato (Solanum tuberosum, St) and Phytophthora infestans (Pi), initial predictions generated high numbers of cleavage site predictions, which highlighted the need of improved analytic tools. Here, we present an R package based on a deep learning convolutional neural network (CNN) in a machine learning environment to optimize discrimination of false from true cleavage sites. When applying smartPARE to our datasets on potato during the infection process by the late blight pathogen, 7.3% of all cleavage windows represented true cleavages distributed on 214 sites in P. infestans and 444 sites in potato. The sRNA landscape of the two organisms is complex with uneven sRNA production and cleavage regions widespread in the two genomes. Multiple targets and several cases of complex regulatory cascades, particularly in potato, was revealed. We conclude that our new analytic approach is useful for anyone working on complex biological systems and with the interest of identifying cleavage sites particularly inferred by sRNA classes beyond miRNAs.


Asunto(s)
Phytophthora infestans/patogenicidad , Solanum tuberosum/microbiología , Interacciones Huésped-Patógeno , Enfermedades de las Plantas/genética , Enfermedades de las Plantas/microbiología , ARN Mensajero/genética , Solanum tuberosum/genética
17.
Environ Res ; 187: 109662, 2020 08.
Artículo en Inglés | MEDLINE | ID: mdl-32460094

RESUMEN

Sulfide-modified nanoscale zerovalent iron (S-nZVI) has excellent reducing performance for heavy metals in water. The influence of environmental factors on the reactivity can be used to explore the practical feasibility of S-nZVI and analyze the reaction mechanism in depth. This study compared the removal effect and mechanism of Cu2+ and Ni2+ by nanoscale zerovalent iron (nZVI), S-nZVI, and carboxymethyl cellulose-modified nanoscale zerovalent iron (CMC-nZVI). The results show that the pseudo-first-order kinetic constant of Cu2+ removal by nZVI, S-nZVI, and CMC-nZVI was 1.384, 1.919, and 2.890 min-1, respectively, and the rate of Ni2+ removal was 0.304, 0.931, and 0.360 min-1, respectively. The removal mechanism of S-nZVI was similar to that of nZVI and CMC-nZVI. Specifically, Cu2+ was predominantly removed by reduction, while Ni2+ removal included adsorption and reduction. Environmental factors had a specific inhibitory effect on the removal of Cu2+ but had a negligible impact on Ni2+. The condition of low pH, the presence of Cl- and humic acid (HA) promoted the corrosion consumption of Fe0, in which H+ directly corroded Fe0 at low pH. At the same time, Cl- and HA inhibited the adsorption or binding of heavy metal ions on the particle surface, thereby reducing the electron transfer and utilization efficiency. The passivation of NO3- reduced the anaerobic corrosion of the material in water but suppressed the release of electrons, thereby reducing the reduction efficiency of the three types of materials. The anaerobic corrosion of S-nZVI was less affected by environmental factors, and it can still maintain more than 80% of the electronic utilization efficiency under different environmental factors, which illustrates that S-nZVI has broad prospects for practical applications in heavy metal polluted water.


Asunto(s)
Metales Pesados , Contaminantes Químicos del Agua , Adsorción , Hierro , Sulfuros , Contaminantes Químicos del Agua/análisis
18.
J Oral Rehabil ; 47 Suppl 1: 91-98, 2020 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-32762046

RESUMEN

BACKGROUND: There is a balance between adipogenic differentiation and osteogenic differentiation of human adipose-derived stem cells (hASCs). It is essential to explore the mechanism of hASCs lineage commitment. In our previous study, UNC-5 netrin receptor B (UNC5B) was identified as a positive regulator for osteogenesis. OBJECTIVE: To further explore the potential roles and mechanisms of UNC5B during adipogenic differentiation and to provide a new method to regulate adipogenesis and osteogenesis of hASCs. METHODS: Lentivirus containing UNC5B shRNA was used for UNC5B knockdown. Plasmids overexpressing UNC5B gene were used for UNC5B upregulation. To investigate the role of UNC5B in adipogenesis in vitro and in vivo, Oil Red O staining, RT-qPCR and transplantation into nude mice were performed. Western blotting analyses were performed to explore the mechanisms of UNC5B in adipogenic differentiation. RESULTS: UNC5B expression in hASCs was significantly increased during adipogenic differentiation. Knockdown of UNC5B enhanced adipogenic differentiation in vitro. Both H&E staining and Oil Red O staining showed more adipose tissue-like constructs in UNC5B-knockdown cells in vivo. Upregulation of UNC5B significantly impaired adipogenic differentiation in vitro. Downregulation of UNC5B could increase phosphorylation of JNK in hASCs. JNK inhibitors reduced adipogenic differentiation of hASCs. CONCLUSION: Our findings showed that UNC5B inhibited adipogenesis of hASCs through JNK signalling. As a whole, UNC5B regulates both adipogenesis and osteogenesis of hASCs.


Asunto(s)
Adipogénesis , Sistema de Señalización de MAP Quinasas , Animales , Diferenciación Celular , Células Cultivadas , Humanos , Ratones , Ratones Desnudos , Receptores de Netrina/fisiología , Osteogénesis , Células Madre
19.
Angew Chem Int Ed Engl ; 59(7): 2850-2859, 2020 02 10.
Artículo en Inglés | MEDLINE | ID: mdl-31802603

RESUMEN

The design and scalable synthesis of robust 2D biological ultrathin films with a tunable structure and function and the ability to be easily transferred to a range of substrates remain key challenges in chemistry and materials science. Herein, we report the use of the thiol-disulfide exchange reaction in the synthesis of a macroscopic 2D ultrathin proteinaceous film with the potential for large-scale fabrication and on-demand encapsulation/release of functional molecules. The reaction between the Cys6-Cys127 disulfide bond of lysozyme and cysteine is chemo- and site-selective. The partially unfolded lysozyme-cysteine monomers aggregate at the air/water or solid/liquid interface to form an ultra-large 2D nanofilm (900 cm2 ) with about 100 % optical transparency. This material adheres to a wide range of substrates and encapsulates and releases a range of molecules without significantly affecting activity.


Asunto(s)
Disulfuros/química , Nanopartículas/química , Proteínas/síntesis química , Compuestos de Sulfhidrilo/química , Sustancias Macromoleculares/síntesis química , Sustancias Macromoleculares/química , Modelos Moleculares , Estructura Molecular , Tamaño de la Partícula , Proteínas/química , Propiedades de Superficie
20.
J Cell Biochem ; 120(9): 15106-15118, 2019 09.
Artículo en Inglés | MEDLINE | ID: mdl-31020692

RESUMEN

Overall survival of patients with low-grade glioma (LGG) has shown no significant improvement over the past 30 years, with survival averaging approximately 7 years. This study aimed to identify novel promising biomarkers of LGG and reveal its potential molecular mechanisms by integrated bioinformatics analysis. The microarray datasets of GSE68848 and GSE4290 were selected from GEO database for integrated analysis. In total, 293 overlapping differentially expressed genes (DEGs) were detected using the limma package. One hundred and eighty-eight nodes with 603 interactions were obtained from the establishment of protein-protein interaction (PPI) network. Functional and signaling pathway enriched were significantly correlated with the synapse and calcium signaling pathway, respectively. Module analysis revealed eight hub genes with high connectivity, which included CHRM1, DLG2, GABRD, GRIN1, HTR2A, KCNJ3, KCNJ9, and NUSAP1, and they were markedly correlated with patients' prognosis. The mining of the Gene Expression Profiling Interactive Analysis database and qPCR further confirmed the abnormal expression of these key genes with their prognostic value in LGG. We eventually predicted the 20 most vital small molecule drugs, which potentially reverse the carcinogenic state of LGG, as per the CMap (connectivity map) database and these DEGs, and MS-275 (enrichment score = -0.939) was considered as the most promising small molecule to treat LGG. In conclusion, our study provided eight reliable novel molecular biomarkers for diagnosis, prognosis prediction, and treatment targets for LGG. These conclusions will contribute to a better comprehension of molecular mechanisms fundamental to LGG occurrence and progression, and providing new insights for future development of genomic individualized treatment in LGG.


Asunto(s)
Biomarcadores de Tumor/genética , Neoplasias Encefálicas/tratamiento farmacológico , Neoplasias Encefálicas/genética , Biología Computacional , Glioma/tratamiento farmacológico , Glioma/genética , Secuenciación de Nucleótidos de Alto Rendimiento , Bibliotecas de Moléculas Pequeñas/uso terapéutico , Biomarcadores de Tumor/metabolismo , Neoplasias Encefálicas/patología , Perfilación de la Expresión Génica , Regulación Neoplásica de la Expresión Génica , Glioma/patología , Humanos , Clasificación del Tumor , Mapas de Interacción de Proteínas/genética , Bibliotecas de Moléculas Pequeñas/farmacología , Análisis de Supervivencia
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