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1.
BMC Plant Biol ; 24(1): 493, 2024 Jun 03.
Artículo en Inglés | MEDLINE | ID: mdl-38831288

RESUMEN

Drought is one of the natural stresses that greatly impact plants. Castor bean (Ricinus communis L.) is an oil crop with high economic value. Drought is one of the factors limiting castor bean growth. The drought resistance mechanisms of castor bean have become a research focus. In this study, we used castor germinating embryos as experimental materials, and screened genes related to drought resistance through physiological measurements, proteomics and metabolomics joint analysis; castor drought-related genes were subjected to transient silencing expression analysis in castor leaves to validate their drought-resistant functions, and heterologous overexpression and backward complementary expression in Arabidopsis thaliana, and analysed the mechanism of the genes' response to the participation of Arabidopsis thaliana in drought-resistance.Three drought tolerance-related genes, RcECP 63, RcDDX 31 and RcA/HD1, were obtained by screening and analysis, and transient silencing of expression in castor leaves further verified that these three genes corresponded to drought stress, and heterologous overexpression and back-complementary expression of the three genes in Arabidopsis thaliana revealed that the function of these three genes in drought stress response.In this study, three drought tolerance related genes, RcECP 63, RcDDX 31 and RcA/HD1, were screened and analysed for gene function, which were found to be responsive to drought stress and to function in drought stress, laying the foundation for the study of drought tolerance mechanism in castor bean.


Asunto(s)
Arabidopsis , Sequías , Ricinus communis , Semillas , Ricinus communis/genética , Ricinus communis/fisiología , Semillas/genética , Semillas/fisiología , Semillas/crecimiento & desarrollo , Arabidopsis/genética , Arabidopsis/fisiología , Genes de Plantas , Proteínas de Plantas/genética , Proteínas de Plantas/metabolismo , Regulación de la Expresión Génica de las Plantas , Estrés Fisiológico/genética , Resistencia a la Sequía
2.
Nutr Metab Cardiovasc Dis ; 34(6): 1407-1415, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38664127

RESUMEN

BACKGROUND AND AIMS: The associations between dietary vitamin C (VC), vitamin E (VE) intake and aortic aneurysm and dissection (AAD) remain unclear. This study aimed to prospectively investigate the associations between dietary VC and VE with the incident risk of AAD. METHODS AND RESULTS: A total of 139 477 participants of UK Biobank cohort were included in the analysis. Dietary VC and VE consumptions were acquired through a 24-h recall questionnaire. Cox proportional regression models were used to examine the associations between VC, VE intake and the risk of AAD. Incident AAD was ascertained through hospital inpatient records and death registers. During a median follow-up of 12.5 years, 962 incident AAD events were documented. Both dietary VC [adjusted hazard ratio (HR), 0.77; 95 % confidence intervals (CI), 0.63-0.93; P-trend = 0.008] and VE (adjusted HR, 0.70; 95 % CI, 0.57-0.87; P-trend = 0.002) were inversely associated with incident AAD when comparing the participants in the highest quartile with those in the lowest. In subgroup analyses, the associations were more pronounced in participants who were over 60 years old, participants with smoking history, hypertension or hyperlipidemia, who were under the high risk of AAD. CONCLUSION: Higher dietary VC and VE intakes are associated with reduced risk of AAD. Our study emphasizes the importance of diet adjustment strategies targeted on VC and VE to lower the incidence rate of AAD especially in the high-risk population.


Asunto(s)
Aneurisma de la Aorta , Disección Aórtica , Ácido Ascórbico , Factores Protectores , Vitamina E , Humanos , Masculino , Estudios Prospectivos , Persona de Mediana Edad , Femenino , Ácido Ascórbico/administración & dosificación , Ácido Ascórbico/efectos adversos , Vitamina E/administración & dosificación , Factores de Riesgo , Anciano , Incidencia , Disección Aórtica/epidemiología , Disección Aórtica/prevención & control , Aneurisma de la Aorta/epidemiología , Aneurisma de la Aorta/prevención & control , Medición de Riesgo , Reino Unido/epidemiología , Factores de Tiempo , Dieta/efectos adversos , Adulto
3.
Ecotoxicol Environ Saf ; 274: 116222, 2024 Apr 01.
Artículo en Inglés | MEDLINE | ID: mdl-38503106

RESUMEN

Previous studies have shown that early-life exposure to fine particulate matter (PM2.5) is associated with an increasing risk of autism spectrum disorder (ASD), however, the specific sensitive period of ASD is unknown. Here, a model of dynamic whole-body concentrated PM2.5 exposure in pre- and early-postnatal male offspring rats (MORs) was established. And we found that early postnatal PM2.5 exposed rats showed more typical ASD behavioral characteristics than maternal pregnancy exposure rats, including poor social interaction, novelty avoidance and anxiety disorder. And more severe oxidative stress and inflammatory responses were observed in early postnatal PM2.5 exposed rats. Moreover, the expression level of phosphatase and tensin homolog deleted on chromosome ten (PTEN) was down-regulated and the ratios of p-PI3K/PI3K and p-AKT/AKT were up-regulated in early postnatal PM2.5 exposed rats. This study suggests that early postnatal exposure to PM2.5 is more susceptible to ASD-like phenotype in offspring than maternal pregnancy exposure and the activation of PI3K-AKT signaling pathway may represent underlying mechanisms.


Asunto(s)
Trastorno del Espectro Autista , Material Particulado , Animales , Femenino , Masculino , Embarazo , Ratas , Trastorno del Espectro Autista/inducido químicamente , Trastorno del Espectro Autista/metabolismo , Material Particulado/toxicidad , Fenotipo , Fosfatidilinositol 3-Quinasas/metabolismo , Proteínas Proto-Oncogénicas c-akt/metabolismo , Transducción de Señal
4.
BMC Public Health ; 23(1): 2123, 2023 10 30.
Artículo en Inglés | MEDLINE | ID: mdl-37899473

RESUMEN

BACKGROUND: Commencing work at an early age has been linked to various risk factors for coronary heart disease (CHD), such as shift work and intensive job strain. However, the relationship between starting work too early and CHD risk remains largely unclear. We examined the association between age at job initiation and the risk of CHD. METHODS: UK Biobank participants aged 38 to 70 years without cardiovascular disease who provided data on their age at job initiation were included. The primary outcome was CHD, which was ascertained using hospital and death records. The hazard ratios (HRs) and 95% confidence interval (CIs) for the association between age at job initiation and CHD were calculated using multivariable Cox regression. RESULTS: Of the 501,971 participants, 114,418 eligible participants were included in the final analysis. The median age at job initiation was 19.0 years. During the mean follow-up of 12.6 years, 6,130 (5.4%) first CHD events occurred. We observed that age at job initiation was inversely associated with CHD (HR 0.98, 95% CI 0.97-0.99), and the association was potentially J-shaped. The HRs for the < 17-year, 17-18-year, and 19-21-year age groups were 1.29 (95%CI 1.18-1.41), 1.12 (95% CI 1.03-1.22) and 1.05 (95% CI 0.97-1.14), respectively, compared with those of the ≥ 22-year group. CONCLUSIONS: Age at job initiation was associated with incident CHD, which was independent of socioeconomic status. Participants who commenced employment before the age of 19 years exhibited a higher risk of developing CHD later in adulthood.


Asunto(s)
Bancos de Muestras Biológicas , Enfermedad Coronaria , Humanos , Adulto Joven , Adulto , Estudios de Cohortes , Enfermedad Coronaria/epidemiología , Factores de Riesgo , Reino Unido/epidemiología
5.
Biochem Genet ; 61(4): 1334-1350, 2023 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-36586009

RESUMEN

Crim1 has been implicated in cataracts in mice and is of great importance in the development of the eye in both humans and mice. Therefore, we aimed to clarify how Crim1 mutations affect lens development and the molecular mechanism of cataracts in mice through comprehensive bioinformatics analysis. The microarray chip was downloaded from the GEO database to obtain the gene expression profile data set. Differentially expressed genes (DEGs) were screened using the limma package. GO and KEGG analyses of DEGs were performed using the DAVID database. Then, we established the protein-protein interaction (PPI) network in Cytoscape. Next, we used MCODE to analyze the data. We obtained 750 DEGs in total, including 407 upregulated DEGs and 343 downregulated DEGs. GO analysis showed that the DEGs were mainly related to biological processes, such as apoptosis, cell translation and the immune system. KEGG analysis showed that the enriched functions and pathways were related to the processing and presentation of ribosomes, lysosomes, and antigens. We identified 18 HUB genes, among which four core genes, C1qa, C1qb, C1qc, and Cd74, were closely related to congenital cataracts induced by Crim1 mutation. This study reveals the molecular pathogenesis of congenital cataracts induced by Crim1, and this information is expected to facilitate clinical genetic testing, molecular diagnosis, prognosis, and individualized chemotherapy for congenital cataracts (CC).


Asunto(s)
Catarata , Perfilación de la Expresión Génica , Humanos , Animales , Ratones , Regulación Neoplásica de la Expresión Génica , Catarata/genética , Biología Computacional , Mutación , ARN Mensajero , Receptores de Proteínas Morfogenéticas Óseas/genética
6.
Exp Eye Res ; 209: 108626, 2021 08.
Artículo en Inglés | MEDLINE | ID: mdl-34087205

RESUMEN

Exosomes have diverse functions and rich content and are involved in intercellular communication, immune regulation, viral infection, tissue regeneration, and the occurrence, development and metastasis of tumours. Notably, various stem cell-derived exosomes are expected to become new therapeutic approaches for inflammatory diseases and tumours and have good clinical application prospects. However, few studies have examined exosomes in ophthalmic diseases. Therefore, based on the functions of exosomes, this paper summarizes progress in the possible use of exosomes as treatment for specific ophthalmic diseases, aiming to determine the pathogenesis of exosomes to achieve more effective clinical diagnosis and treatment of these diseases.


Asunto(s)
Manejo de la Enfermedad , Exosomas/fisiología , Oftalmopatías/genética , Células Madre Mesenquimatosas/citología , Comunicación Celular , Oftalmopatías/patología , Oftalmopatías/terapia , Humanos , Células Madre Mesenquimatosas/metabolismo
7.
Cancer Rep (Hoboken) ; 7(2): e1933, 2024 02.
Artículo en Inglés | MEDLINE | ID: mdl-38321787

RESUMEN

BACKGROUND: Retinoblastoma (RB) is the most common prevalent intraocular malignancy among infants and children, particularly in underdeveloped countries. With advancements in genomics and transcriptomics, noncoding RNAs have been increasingly utilized to investigate the molecular pathology of diverse diseases. AIMS: This study aims to establish the competing endogenous RNAs network associated with RB, analyse the function of mRNAs and lncRNAs, and finds the relevant regulatory network. METHODS AND RESULTS: This study establishes a network of competing endogenous RNAs by Spearman correlation analysis and prediction based on RB patients and healthy children. Enrichment analyzes based on Gene Ontology and the Kyoto Encyclopedia of Genes and Genomes are conducted to analyze the potential biological functions of lncRNA and mRNA networks. Weighted gene co-expression network analysis (WGCNA) is employed to identify gene cluster modules exhibiting the strongest correlation with RB. The results indicate a significant correlation between the lncRNA MIR17HG (R = .73, p = .02) and the RB phenotype. ceRNA networks reveal downstream miRNAs (hsa-mir-425-5p and hsa-mir455-5p) and mRNAs (MDM2, IPO11, and ITGA1) associated with MIR17Hg. As an inhibitor of the p53 signaling pathway, MDM2 can suppress the development of RB. CONCLUSION: In conclusion, lncRNAs play a role in RB, and the MIR17HG/hsa-mir-425-5p/MDM2 pathway may contribute to RB development by inhibiting the p53 signaling pathway.


Asunto(s)
MicroARNs , ARN Largo no Codificante , Neoplasias de la Retina , Retinoblastoma , Niño , Humanos , Lactante , beta Carioferinas , Biología Computacional/métodos , MicroARNs/genética , Neoplasias de la Retina/genética , Retinoblastoma/genética , ARN Largo no Codificante/genética , ARN Mensajero/genética , Proteína p53 Supresora de Tumor
8.
Plants (Basel) ; 13(2)2024 Jan 09.
Artículo en Inglés | MEDLINE | ID: mdl-38256731

RESUMEN

To cope with the yield loss caused by drought stress, new oat varieties with greater drought tolerance need to be selected. In this study, two oat varieties with different drought tolerances were selected for analysis of their phenotypes and physiological indices under moderate and severe soil drought stress. The results revealed significant differences in the degree of wilting, leaf relative water content (RWC), and SOD and CAT activity between the two oat genotypes under severe soil drought stress; moreover, the drought-tolerant variety exhibited a significant increase in the number of stomata and wax crystals on the surface of both the leaf and guard cells; additionally, the morphology of the guard cells was normal, and there was no significant disruption of the grana lamella membrane or the nuclear envelope. Furthermore, transcriptome analysis revealed that the expression of genes related to the biosynthesis of waxes and cell-wall components, as well as those of the WRKY family, significantly increased in the drought-tolerant variety. These findings suggest that several genes involved in the antioxidant pathway could improve drought tolerance in plants by regulating the increase/decrease in wax and cell-wall constituents and maintaining normal cellular water potential, as well as improving the ability of the antioxidant system to scavenge peroxides in oats.

9.
Acta Cardiol ; 79(3): 374-382, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38469674

RESUMEN

BACKGROUND: The potential influence of tinnitus on cardiovascular disease (CVD) and all-cause mortality has yet to be explored. We aim to examine the correlations between tinnitus and the risk of cardiovascular events and all-cause mortality. METHODS: We conducted a prospective cohort study utilising data from the UK Biobank. The presence of tinnitus was evaluated through a questionnaire. The primary outcome was defined as a composition of cardiovascular events, including myocardial infarction (MI), stroke, and mortality from CVD, as well as all-cause mortality. Cox proportional hazard models were employed to examine the associations between tinnitus and both the primary outcome and its individual components. Sensitivity analyses were conducted to evaluate the robustness of the primary analysis. RESULTS: A total of 140,146 participants were included in the study. The presence of tinnitus was found to be associated with a higher incident rate of the primary outcome (HR = 1.057, 95%CI: 1.017-1.099, p = 0.005), MI (HR = 1.139, 95%CI: 1.061-1.222, p < 0.001) and all-cause mortality (HR = 1.053, 95%CI: 1.003-1.105, p = 0.038) after adjusting for confounders. However, there was no significant association between tinnitus and stroke or mortality from CVD. Subgroup analysis revealed that the association between tinnitus and the primary outcome was significant in females, participants with abnormal BMI, and those without hearing difficulty, depression or anxiety. Sensitivity analyses yielded consistent results. CONCLUSION: The findings from this study contribute to the existing body of evidence suggesting an association between tinnitus and an increased risk of cardiovascular events and all-cause mortality.


Asunto(s)
Enfermedades Cardiovasculares , Causas de Muerte , Acúfeno , Humanos , Acúfeno/epidemiología , Acúfeno/mortalidad , Femenino , Masculino , Reino Unido/epidemiología , Enfermedades Cardiovasculares/mortalidad , Enfermedades Cardiovasculares/epidemiología , Persona de Mediana Edad , Estudios Prospectivos , Causas de Muerte/tendencias , Factores de Riesgo , Anciano , Medición de Riesgo/métodos , Incidencia , Bancos de Muestras Biológicas , Adulto , Biobanco del Reino Unido
10.
Front Genet ; 14: 970465, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37229188

RESUMEN

PM2.5 induces a series of effects on neurological disorders, including autism spectrum disorder (ASD), however, the mechanism is not completely clear yet. Circular RNAs (circRNAs) are a class of closed-loop structures that can be stably expressed in vivo. In our experiments, rats exposed to PM2.5 exhibited autism-like phenotypes, such as anxiety, and memory loss. To explore the etiology, we performed transcriptome sequencing and found significant differences in the expression of circRNA. A total of 7770 circRNAs were identified between the control and experimental groups, 18 of which were differentially expressed, we selected ten circRNAs and performed qRT-PCR and Sanger sequencing to validate them. By GO and KEGG enrichment analysis, we found differentially expressed circRNAs that were mainly enriched in processes related to placental development and reproduction. Finally, using bioinformatics, we predicted miRNAs and mRNAs that circ-Mbd5 and circ-Ash1l might regulate and constructed circRNA-miRNA-mRNA networks involving genes associated with ASD, suggesting that circRNAs might regulate the occurrence of ASD.

11.
Heliyon ; 9(3): e14328, 2023 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-36938421

RESUMEN

Perinatal air pollution plays an important role in the development of autism. However, research on the pathogenic mechanism remains limited. In this study, the model of systemic inhalation of concentrated approximately 8-fold the level (mean concentration was 224 µg/m3) reported in ambient outdoor air of PM2.5 (particulate matters that are 2.5 µm or less in diameter)in early-postnatal male Sprague-Dawley (SD) rats was established. Through a series of autism-related behavioral tests, it was identified that young rats (postnatal day 1-day21, named PND1-PND21) exposed to PM2.5 exhibited typical autistic phenotypes, such as impaired language communication, abnormal repetitive and stereotyped behaviors, and impaired social skills. Moreover, synaptic abnormalities have been found in the brain tissues of young rats exposed to PM2.5. In terms of the molecular mechanism, we found that the levels of SH3 and multiple ankyrin repeat domains 3 (SHANK3) expression and key molecular proteins in the downstream signaling pathways were decreased in the brain tissues of the exposed rats. Finally, at the epigenetic level, SHANK3 methylation levels were increased in young rats exposed to PM2.5. In conclusion, the study revealed that PM2.5 exposure might induce the early postnatal autism through the SHANK3 signaling pathway by affecting the SHANK3 methylation levels and reducing the SHANK3 expression levels. The study could provide new ideas for autism etiology and a theoretical basis for the prevention and treatment of autism in children.

12.
Environ Int ; 178: 108092, 2023 08.
Artículo en Inglés | MEDLINE | ID: mdl-37463541

RESUMEN

Various perfluoroethercarboxylic acids (PFECA) have emerged as next-generation replacements of legacy per- and polyfluoroalkyl substances (PFAS). However, there is a paucity of information regarding their bioaccumulation ability and hazard characterization. Here, we explored the accumulation and hepatotoxicity of four PFECA compounds (HFPO-DA, HFPO-TA, PFO4DA, and PFO5DoDA) in comparison to perfluorooctanoic acid (PFOA) after chronic low-dose exposure in mice. Except for HFPO-DA, the levels of all tested PFAS in the liver exceeded that in serum. High molecular weight PFECA compounds (PFO5DoDA and HFPO-TA) showed stronger accumulation capacity and longer half-lives (t1/2) than low molecular weight PFECA compounds (HFPO-DA and PFO4DA) and even legacy PFOA. Although hepatomegaly is a common apical end point of PFAS exposure, the differentially expressed gene (DEG) profiles in the liver suggested significant differences between PFOA and the four PFECA compounds. Gene enrichment analysis supported a considerable inhibitory effect of PFECA, but not PFOA, on the glucocorticoid receptor (GR) signaling pathway. Both HFPO-TA and PFO5DoDA demonstrated a more pronounced ability to perturb RNA expression profiles in vivo and to suppress GR signaling in vitro compared to HFPO-DA and PFO4DA. Calculated reference doses (RfDs) emphasized the potential hazard of PFECA to human health. Overall, our findings indicate that PFECA alternatives do not ease the concerns raised from legacy PFAS pollution.


Asunto(s)
Ácidos Alcanesulfónicos , Fluorocarburos , Ratones , Animales , Humanos , Glucocorticoides , Fluorocarburos/toxicidad
13.
Artículo en Zh | MEDLINE | ID: mdl-35634661

RESUMEN

Objective: To investigate the effects of PM2.5 exposure at different stages of early life on the prefrontal cortex of offspring rats. Methods: Twelve pregnant SD rats were randomly divided into four groups: Control group (CG), Maternal pregnancy exposure group (MG), Early postnatal exposure group (EP) and Perinatal period exposure group (PP), 3 rats in each group. The pregnant and offspring rats were exposed to clean air or 8-fold concentrated PM2.5. MG was exposed from gestational day (GD) 1 to GD21. EP was exposed from postnatal day (PND) 1 to PND21, and PP was exposed from GD1 to PND21. After exposure, the prefrontal cortex of 6 offspring rats in each group was analyzed. HE staining was used to observe the pathological damage in the prefrontal cortex. ELISA was employed to detect neuroinflammatory factors, and HPLC/MSC was applied to determine neurotransmitter content. Western blot and colorimetry were applied for detecting astrocyte markers and oxidative stress markers, respectively. Results: Compared with MG and CG, the pathological changes of prefrontal cortex in PP and EP were more obvious. Compared with MG and CG, the neuroinflammatory factors (IL-1, IL-6, TNF-α) in PP and EP were increased significantly (P<0.01), the level of MT were decreased significantly (P<0.05), and the level of oxytocin (OT) showed a downward trend; the level of neurotransmitter ACh was also increased significantly (P<0.01). Compared with MG and CG, the GFAP level of PP and EP showed an upward trend, the level of oxidative stress index SOD in PP and EP was decreased significantly (P<0.01), and the level of ROS was increased significantly (P<0.01). Compared with the offspring rats of CG and MG, the CAT level of PP was decreased significantly (P<0.01, P<0.05). Compared with the offspring rats of CG, the CAT level of EP was decreased significantly (P<0.05). There was no significant difference in IL-1, IL-6, TNF-α, MT, OT, ACh, GFAP, SOD, ROS and CAT levels between PP and EP, or MG and CG. Conclusion: PM2.5 exposure in early life has adverse effects on the prefrontal cortex of offspring male rats, and early birth exposure may be more sensitive.


Asunto(s)
Interleucina-6 , Factor de Necrosis Tumoral alfa , Animales , Femenino , Interleucina-1/farmacología , Masculino , Neurotransmisores , Material Particulado/toxicidad , Corteza Prefrontal , Embarazo , Ratas , Ratas Sprague-Dawley , Especies Reactivas de Oxígeno , Superóxido Dismutasa , Factor de Necrosis Tumoral alfa/farmacología
14.
Cardiovasc Toxicol ; 21(5): 410-421, 2021 05.
Artículo en Inglés | MEDLINE | ID: mdl-33475962

RESUMEN

Ultrafine particles (UFPs) referred to particular matters with aerosol diameter less than 100 nm. Because of the lightweight and small size, UFPs have become an occupational inhalation risk. The UFPs will be accumulated in the deep lung through inhalation, and then reach into all the organs via circulation system; some UFPs even stay in the brain. As previous study reported, UFPs exposure is usually associated with cardiovascular disease, such as atherosclerosis (AS). In our study, we tried to understand how acute UFP exposure caused the biological dysregulation in atherosclerosis. Acute exposure of UFPs were applied to mice for 6 consecutive days, mice were sacrificed after 3, 5, 7, and 10 days post-exposure. Aorta and serum were collected for histological and biomarkers analysis. Mice aortic adventitial fibroblasts (MAFs) were isolated from mice and used to further study to understand the mechanism of UFPs induced atherosclerosis. Compared to the untreated control, the inflammation responses and nitrate stress were observed after acute exposure of UFPs, with increased IL-6, MCP-1, p47phox, and 3-NT levels in the mice serum. Besides, upregulation of microRNAs: miR-301b-3p and Let-7c-1-3p, and their downstream target: Smad2, Smad3, and TGFß1 were also observed in mouse aorta after acute exposure of UFPs. Similar results were identified in vitro as well. Acute exposure of UFPs induced the systematic nitrate stress and inflammation responses, along with the changes of vascular permeability. Dysregulated miRNAs and TGFß/Smads signaling pathway indicated the higher risk of atherosclerosis/vasculature remodeling when exposed to UFPs.


Asunto(s)
Aorta/efectos de los fármacos , Aterosclerosis/inducido químicamente , Mediadores de Inflamación/metabolismo , Inflamación/inducido químicamente , Material Particulado/toxicidad , Proteínas Smad/metabolismo , Factor de Crecimiento Transformador beta/metabolismo , Animales , Aorta/metabolismo , Aorta/patología , Aterosclerosis/genética , Aterosclerosis/metabolismo , Aterosclerosis/patología , Células Cultivadas , Modelos Animales de Enfermedad , Fibroblastos/efectos de los fármacos , Fibroblastos/metabolismo , Fibroblastos/patología , Inflamación/genética , Inflamación/metabolismo , Inflamación/patología , Ratones Noqueados para ApoE , Tamaño de la Partícula , Permeabilidad , Transducción de Señal , Remodelación Vascular/efectos de los fármacos
15.
Ophthalmol Ther ; 10(3): 601-617, 2021 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-34159561

RESUMEN

INTRODUCTION: Demodex and bacteria are both components of the ocular surface micro-ecology, constituting a complex interaction. This study aims to explore how ocular surface Demodex infestation (DI) affects ocular surface microbial communities and diversity. METHODS: We recruited 255 subjects, and examined the correlation between ocular surface mite infestation and clinical indicators such as age, blood glucose level, dry eye symptoms, and blood pressure. 16S rRNA sequencing was performed on the conjunctival swab samples of 14 patients with ocular DI (P group) and 17 healthy people (N group). For further analysis, the subjects were divided into four subgroups, i.e. N-NMGD (n = 11), N-MGD (n = 6), P-NMGD (n = 6), and P-MGD (n = 8), according to meibomian gland dysfunction (MGD) or no MGD (NMGD). RESULTS: There was no difference in the α-diversity of ocular surface microbial communities between the DI and healthy control groups. In linear discriminant analysis effect size (LEfSe), there were more Acinetobacter, Novosphingobium, and Anoxybacillus in the DI group and fewer Novosphingobium, Lactobacillus, and Candidatus Microthrix in the healthy control group. P-NMGD had more Thermaceae and fewer Pseudomonas than P-MGD. There were more Bacteroidetes in N-NMGD than in N-MGD. The α-diversity of P-NMGD was lower than that of N-NMGD (Shannon index, P = 0.027). At the same time, the α-diversity of N-MGD was lower than that of N-NMGD (Shannon, Simpson, and dominance index, P = 0.048). There was no significant difference in ß-diversity or in the primary flora at the phylum and genus levels between groups and subgroups. CONCLUSION: DI had no significant effect on the diversity of ocular surface microbial communities. DI primarily changed the dominant flora and relative abundance of ocular surface microbial communities. MGD may play an important role in this process.

16.
Am J Sports Med ; 48(5): 1141-1150, 2020 04.
Artículo en Inglés | MEDLINE | ID: mdl-32074471

RESUMEN

BACKGROUND: The pathogenesis of patellar tendon fibrosis caused by overuse remains unclear. In an effort to further investigate effective treatments for patellar tendon fibrosis attributed to overuse, it is necessary to construct a reliable animal model. PURPOSE: A rabbit patellar tendon fibrosis model was developed with the use of electrical stimulation to induce jumping. The pathogenesis and development of patellar tendon fibrosis were subsequently investigated with this model. STUDY DESIGN: Controlled laboratory study. METHODS: A total of 32 New Zealand White rabbits were randomly divided into a jumping group and a control group. Rabbits in the control group did not receive any treatment, while those in the jumping group jumped 150 times daily, 5 days per week. At 2, 4, 6, and 8 weeks after the initiation of treatment, the patellar tendons of 4 rabbits from each group were harvested and subjected to hematoxylin and eosin staining, immunohistochemical staining, and real-time polymerase chain reaction. The influence of jumping training on the expressions of histology- and fibrosis-related factors in the patellar tendon was assessed. RESULTS: The histological changes of patellar tendon fibrosis in the jumping group were most pronounced at 4 weeks. When compared with the control group at corresponding time points, the mRNA and protein expressions of TGF-ß1, CTGF, COL-I, and COL-III were upregulated significantly in the patellar tendon after jumping training for 4 weeks (P < .05). Intragroup comparison at different time points indicated that the mRNA and protein expressions of TGF-ß1, COL-I, and COL-III were the highest at 4 weeks in the jumping group (P < .01). CONCLUSION: It was found that patellar tendon fibrosis occurred because of overuse and the peak changes occurred at 4 weeks. Jumping load increased the secretions of TGF-ß1 and Smad3 in the patellar tendon, with CTGF upregulation and higher synthesis of COL-I and COL-III, which were considered the pathogenesis of fibrosis. CLINICAL RELEVANCE: This study simulated the effects of jumping load on tendon fibrosis at different time points. Moreover, the time course relationship between jumping training and patellar tendon fibrosis in the rabbit model was determined, which provided a new animal model for the study of patellar tendon fibrosis.


Asunto(s)
Trastornos de Traumas Acumulados/patología , Ligamento Rotuliano/patología , Animales , Colágeno Tipo I/metabolismo , Colágeno Tipo III/metabolismo , Factor de Crecimiento del Tejido Conjuntivo/metabolismo , Modelos Animales de Enfermedad , Fibrosis , Conejos , Distribución Aleatoria , Factor de Crecimiento Transformador beta1/metabolismo
17.
J Asian Nat Prod Res ; 11(3): 274-80, 2009.
Artículo en Inglés | MEDLINE | ID: mdl-19408153

RESUMEN

A new approach for the synthesis of the (+)-conagenin has been achieved based on Evans asymmetry syn-aldol reaction and the self-regeneration of stereocenters strategy.


Asunto(s)
Serina/análogos & derivados , Aldehídos/química , Estructura Molecular , Serina/síntesis química , Serina/química , Estereoisomerismo , Streptomyces/química
18.
J Asian Nat Prod Res ; 11(3): 281-7, 2009.
Artículo en Inglés | MEDLINE | ID: mdl-19408154

RESUMEN

( - )-Talaumidin (1) and ( - )-galbelgin (2) have been synthesized via 4-pentenoic acid as a starting material with the overall yield of about 17.8 and 16.9%, respectively. The key steps include Evans asymmetry anti-aldol reaction, TBS protection, hydroboration, oxidation, Friedel-Crafts arylation, etc.


Asunto(s)
Ácidos Grasos Monoinsaturados/química , Furanos/síntesis química , Lignanos/síntesis química , Aldehídos/química , Furanos/química , Lignanos/química , Estructura Molecular , Estereoisomerismo
19.
Pest Manag Sci ; 74(7): 1728-1735, 2018 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-29377489

RESUMEN

BACKGROUND: Increasing attention is being paid to physical methods to control pests such as insect trapping. In order to examine how pesticides can reasonably be combined with the use of an insect-trapping lamp and by how much this can reduce the amount of pesticide used, five treatments were applied to a winter wheat-summer maize rotation system in eastern China: a treatment in which only pesticides were used; a treatment with only insect-trapping lamps; insect-trapping lamps plus one application of pesticides; insect-trapping lamps plus two applications of pesticides; insect-trapping lamps plus three applications of pesticides. RESULTS: The results showed that, when pesticides were reduced by 25-35%, the insect-trapping lamps controlled the insect population well and yields were not decreased but were actually increased, with pesticides being applied only at 2 days before winter wheat planting, at winter wheat flowering and at the big flare stage of summer maize. Reducing pesticides by 35-65% had no adverse effect on crop yields, and thus had the potential to reduce the costs of pest control and produce the greatest economic benefit. When no pesticides were used in the insect-trapping lamp control area, the annual yield was still >15 t hm-2 . CONCLUSION: If pesticides are used in a timely fashion and at the appropriate stage, their use may be greatly reduced with the help of an insect-trapping lamp. © 2018 Society of Chemical Industry.


Asunto(s)
Control de Insectos/métodos , Insecticidas , Luz , Triticum , Zea mays , China , Producción de Cultivos/métodos , Estaciones del Año , Triticum/crecimiento & desarrollo , Zea mays/crecimiento & desarrollo
20.
Yao Xue Xue Bao ; 42(6): 576-82, 2007 Jun.
Artículo en Zh | MEDLINE | ID: mdl-17702391

RESUMEN

This paper describes natural products, semi-synthetic natural products and natural product-derived compounds used for treating antiparasitic, antiviral and neurological disease that were being evaluated in clinical trials or in registration from 1998 to the end of 2005.


Asunto(s)
Antiparasitarios/uso terapéutico , Antivirales/uso terapéutico , Productos Biológicos/uso terapéutico , Ensayos Clínicos como Asunto , Enfermedades del Sistema Nervioso/tratamiento farmacológico , Alcaloides/uso terapéutico , Humanos
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