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1.
Cancer Sci ; 115(8): 2646-2658, 2024 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-38889220

RESUMEN

RNA-binding proteins can regulate nucleotide metabolism and gene expression. UPF3B regulator of nonsense mediated mRNA decay (UPF3B) exhibits dysfunction in cancers. However, its role in the progression of hepatocellular carcinoma (HCC) is still insufficiently understood. Here, we found that UPF3B was markedly upregulated in HCC samples and associated with adverse prognosis in patients. UPF3B dramatically promoted HCC growth both in vivo and in vitro. Mechanistically, UPF3B was found to bind to PPP2R2C, a regulatory subunit of PP2A, boosting its mRNA degradation and activating the PI3K/AKT/mTOR pathway. E2F transcription factor 6 (E2F6) directly binds to the UPF3B promoter to facilitate its transcription. Together, the E2F6/UPF3B/PPP2R2C axis promotes HCC growth through the PI3K/AKT/mTOR pathway. Hence, it could be a promising therapeutic target for treating HCC.


Asunto(s)
Carcinoma Hepatocelular , Regulación Neoplásica de la Expresión Génica , Neoplasias Hepáticas , Fosfatidilinositol 3-Quinasas , Proteínas Proto-Oncogénicas c-akt , Proteínas de Unión al ARN , Serina-Treonina Quinasas TOR , Animales , Femenino , Humanos , Masculino , Ratones , Carcinoma Hepatocelular/genética , Carcinoma Hepatocelular/metabolismo , Carcinoma Hepatocelular/patología , Línea Celular Tumoral , Proliferación Celular/genética , Neoplasias Hepáticas/genética , Neoplasias Hepáticas/metabolismo , Neoplasias Hepáticas/patología , Ratones Desnudos , Fosfatidilinositol 3-Quinasas/metabolismo , Pronóstico , Proteína Fosfatasa 2/metabolismo , Proteína Fosfatasa 2/genética , Proteínas Proto-Oncogénicas c-akt/metabolismo , Proteínas de Unión al ARN/metabolismo , Proteínas de Unión al ARN/genética , Transducción de Señal , Serina-Treonina Quinasas TOR/metabolismo , Regulación hacia Arriba
2.
BMC Musculoskelet Disord ; 24(1): 477, 2023 Jun 10.
Artículo en Inglés | MEDLINE | ID: mdl-37301961

RESUMEN

BACKGROUND: Multiple carpometacarpal fractures and dislocations are rare. This case report describes a novel multiple carpometacarpal injury, namely, 'diagonal' carpometacarpal joint fracture and dislocation. CASE PRESENTATION: A 39-year-old male general worker sustained a compression injury to his right hand in the dorsiflexion position. Radiography indicated a Bennett fracture, hamate fracture, and fracture at the base of the second metacarpal. Subsequent computed tomography and intraoperative examination confirmed an injury to the first to fourth carpometacarpal joint along a diagonal line. The normal anatomy of the patient's hand was successfully restored via open reduction combined with Kirschner wire and steel plate fixation. CONCLUSION: Our findings highlight the importance of taking the injury mechanism into account to avoid a missed diagnosis and to choose the best treatment approach. This is the first case of 'diagonal' carpometacarpal joint fracture and dislocation to be reported in the literature.


Asunto(s)
Articulaciones Carpometacarpianas , Fracturas Óseas , Fracturas Múltiples , Traumatismos de la Mano , Luxaciones Articulares , Traumatismo Múltiple , Traumatismos de la Muñeca , Masculino , Humanos , Adulto , Articulaciones Carpometacarpianas/diagnóstico por imagen , Articulaciones Carpometacarpianas/cirugía , Fracturas Óseas/complicaciones , Fracturas Óseas/diagnóstico por imagen , Luxaciones Articulares/complicaciones , Luxaciones Articulares/diagnóstico por imagen , Traumatismos de la Mano/cirugía
3.
Biochem Biophys Res Commun ; 505(1): 93-98, 2018 10 20.
Artículo en Inglés | MEDLINE | ID: mdl-30241944

RESUMEN

In this study, treatment of high-fat diet-induced obesity (DIO) C57BL/6J mice with spermidine decreased body weight and subcutaneous and visceral fat content, reversed the apparent hepatosteatosis, and reduced hepatic intracellular and serum triglyceride and total cholesterol concentrations. Moreover, spermidine treatment improved glucose tolerance and insulin sensitivity in DIO mice. The mechanism studies indicated that spermidine indeed increased the phosphorylation of hepatic AMP-activated protein kinase (AMPK), and inhibited the expression of lipogenic genes in vivo and in vitro. Moreover, these spermidine-mediated molecular effects were also abolished by compound C, an inhibitor of AMPK, in primary hepatocytes. In summary, spermidine protected against DIO-induced hepatosteatosis by decreasing lipogenic genes expression through an AMPK-mediated mechanism.


Asunto(s)
Proteínas Quinasas Activadas por AMP/metabolismo , Metabolismo de los Lípidos/efectos de los fármacos , Enfermedad del Hígado Graso no Alcohólico/prevención & control , Espermidina/farmacología , Animales , Peso Corporal/efectos de los fármacos , Células Cultivadas , Dieta Alta en Grasa/efectos adversos , Ácido Graso Sintasas/genética , Ácido Graso Sintasas/metabolismo , Regulación de la Expresión Génica/efectos de los fármacos , Hepatocitos/efectos de los fármacos , Hepatocitos/metabolismo , Hígado/efectos de los fármacos , Hígado/metabolismo , Ratones Endogámicos C57BL , Enfermedad del Hígado Graso no Alcohólico/etiología , Enfermedad del Hígado Graso no Alcohólico/metabolismo , Obesidad/etiología , Obesidad/metabolismo , Obesidad/prevención & control , Proteína 1 de Unión a los Elementos Reguladores de Esteroles/genética , Proteína 1 de Unión a los Elementos Reguladores de Esteroles/metabolismo
4.
Gen Comp Endocrinol ; 260: 25-31, 2018 05 01.
Artículo en Inglés | MEDLINE | ID: mdl-28842216

RESUMEN

Insulin resistance is generally responsible for the pathogenesis of type 2 diabetes mellitus (T2DM). Early growth response proteins-2 (Egr2) has been reported to be able to increase the expression of the suppressors of cytokine signaling-1 (SOCS-1), and impair insulin signaling pathway through suppression of insulin receptor substrates (IRS), including IRS-1 and IRS-2. However, whether Egr2 is directly involved in the development of insulin resistance, and how its potential contributions to insulin resistance still remain unknown. Here, our present investigation found that the expression levels of Egr2 were up-regulated when insulin resistance occurs, and knockdown of Egr2 abolished the effect of insulin resistance in HepG2 cells induced with palmitate (PA). Importantly, inhibition of Egr2 decreased the expression of SOCS-1 as well as reduced phosphorylation of JAK2 and STAT3. And, our data indicated that silencing of Egr2 accelerated hepatic glucose uptake and reversed the impaired lipid metabolism upon insulin resistance. In summary, the present study confirms that Egr2 could deteriorate insulin resistance via the pathway of JAK2/STAT3/SOCS-1 and may shed light on resolving insulin resistance and further the pathogenesis of T2DM.


Asunto(s)
Proteína 2 de la Respuesta de Crecimiento Precoz/fisiología , Resistencia a la Insulina/genética , Janus Quinasa 2/metabolismo , Ácido Palmítico/farmacología , Factor de Transcripción STAT3/metabolismo , Proteína 1 Supresora de la Señalización de Citocinas/metabolismo , Animales , Proteína 2 de la Respuesta de Crecimiento Precoz/genética , Células Hep G2 , Humanos , Insulina/metabolismo , Hígado/efectos de los fármacos , Hígado/metabolismo , Fosforilación , Transducción de Señal/efectos de los fármacos , Transducción de Señal/genética
5.
Am J Physiol Cell Physiol ; 304(4): C362-9, 2013 Feb 15.
Artículo en Inglés | MEDLINE | ID: mdl-23242187

RESUMEN

Exposure to atmospheric fine particulate matter (PM(2.5)) is a modifiable risk factor of cardiovascular disease. Ultrafine particles (UFP, diameter <0.1 µm), a subfraction of PM(2.5), promote vascular oxidative stress and inflammatory responses. Epidemiologic studies suggest that PM exposure promotes vascular calcification. Here, we assessed whether UFP exposure promotes vascular calcification via NF-κB signaling. UFP exposure at 50 µg/ml increased alkaline phosphatase (ALP) activity by 4.4 ± 0.2-fold on day 3 (n = 3, P < 0.001) and matrix calcification by 3.5 ± 1.7-fold on day 10 (n = 4, P < 0.05) in calcifying vascular cells (CVC), a subpopulation of vascular smooth muscle cells with osteoblastic potential. Treatment of CVC with conditioned media derived from UFP-treated macrophages (UFP-CM) also led to an increase in ALP activities and matrix calcification. Furthermore, both UFP and UFP-CM significantly increased NF-κB activity, and cotreatment with an NF-κB inhibitor, JSH23, attenuated both UFP- and UFP-CM-induced ALP activity and calcification. When low-density lipoprotein receptor-null mice were exposed to UFP at 359.5 µg/m(3) for 10 wk, NF-κB activation and vascular calcification were detected in the regions of aortic roots compared with control filtered air-exposed mice. These findings suggest that UFP promotes vascular calcification via activating NF-κB signaling.


Asunto(s)
FN-kappa B/metabolismo , Material Particulado/toxicidad , Transducción de Señal , Calcificación Vascular/etiología , Fosfatasa Alcalina , Animales , Aorta Torácica/patología , Bovinos , Diferenciación Celular/efectos de los fármacos , Células Cultivadas , Medios de Cultivo Condicionados , Macrófagos/efectos de los fármacos , Macrófagos/metabolismo , Masculino , Ratones , Ratones Endogámicos C57BL , Ratones Noqueados , Músculo Liso Vascular/patología , Miocitos del Músculo Liso/efectos de los fármacos , Miocitos del Músculo Liso/fisiología , Estrés Oxidativo , Tamaño de la Partícula , Material Particulado/farmacología , Calcificación Vascular/metabolismo , Calcificación Vascular/patología
6.
Biochem Biophys Res Commun ; 436(3): 462-6, 2013 Jul 05.
Artículo en Inglés | MEDLINE | ID: mdl-23751346

RESUMEN

Exposure to airborne particulate pollutants is intimately linked to vascular oxidative stress and inflammatory responses with clinical relevance to atherosclerosis. Particulate matter (PM) has been reported to induce endothelial dysfunction and atherosclerosis. Here, we tested whether ambient ultrafine particles (UFP, diameter <200 nm) modulate eNOS activity in terms of nitric oxide (NO) production via protein S-glutathionylation. Treatment of human aortic endothelial cells (HAEC) with UFP significantly reduced NO production. UFP-mediated reduction in NO production was restored in the presence of JNK inhibitor (SP600125), NADPH oxidase inhibitor (Apocynin), anti-oxidant (N-acetyl cysteine), and superoxide dismutase mimetics (Tempol and MnTMPyP). UFP exposure increased the GSSG/GSH ratio and eNOS S-glutathionylation, whereas over-expression of Glutaredoxin-1 (to inhibit S-glutathionylation) restored UFP-mediated reduction in NO production by nearly 80%. Thus, our findings suggest that eNOS S-glutathionylation is a potential mechanism underlying ambient UFP-induced reduction of NO production.


Asunto(s)
Células Endoteliales/metabolismo , Óxido Nítrico Sintasa de Tipo III/metabolismo , Óxido Nítrico/biosíntesis , Tamaño de la Partícula , Material Particulado/metabolismo , Acetofenonas/farmacología , Animales , Antracenos/farmacología , Aorta/citología , Biomimética , Células Cultivadas , Óxidos N-Cíclicos/farmacología , Células Endoteliales/efectos de los fármacos , Endotelio Vascular/citología , Activación Enzimática , Glutatión/metabolismo , Humanos , Metaloporfirinas/farmacología , Ratones , NADPH Oxidasas/antagonistas & inhibidores , Oxidación-Reducción , Estrés Oxidativo , Marcadores de Spin , Superóxido Dismutasa/antagonistas & inhibidores , Superóxido Dismutasa-1
7.
Org Lett ; 25(26): 4776-4781, 2023 Jul 07.
Artículo en Inglés | MEDLINE | ID: mdl-37358479

RESUMEN

P(NMe2)3-mediated substrate-controlled annulations of azoalkenes with α-dicarbonyl compounds are reported, where the azoalkenes serve as either four or five-atom synthons chemoselectively. The azoalkene participates in annulation with isatins as a four-atom synthon to furnish the spirooxindole-pyrazolines, whereas it functions as a novel five-atom synthon in annulation with aroylformates, thereby leading to chemo- and stereoselective formation of pyrazolones. The synthetic utilities of the annulations have been demonstrated, and a novel TEMPO-mediated decarbonylation reaction is unveiled.

8.
Food Chem ; 373(Pt B): 131472, 2022 Mar 30.
Artículo en Inglés | MEDLINE | ID: mdl-34740046

RESUMEN

A field experiment was conducted to explore the effects of cultivars under flooding irrigation and dry cultivation (D) on starch, fatty acids, and amino acids metabolism, starch physicochemical traits, and pasting properties of rice flour. In this study, high-quality cultivar (HH) had better pasting properties among all other cultivars in D treatment. DHH supported higher short-branch chain amylopectin to develop the crystalline regions. Besides, DHH increased C16:0, C16:1, C18:1, C18:2, glutamate, aspartate, lysine, and threonine, and reduced glutelin and prolamine levels in head rice. Higher pasting properties in DHH was also supported by higher CO in esters and ketones, CO in carboxylic acid, esters, alcohols, and ethers, OH in alcohols before pasting and lower CO and CO in carboxylic acid, CO in aldehydes, and CO, CO and OH in carboxylic acid after pasting. Overall, these findings improve pasting properties to maintain a higher cooking quality in dry cultivation.


Asunto(s)
Oryza , Almidón , Aminoácidos , Amilopectina , Amilosa , Ácidos Grasos
9.
Front Med (Lausanne) ; 9: 990611, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-36314022

RESUMEN

Purpose: To investigate whether stereoscopic vs. monoscopic viewing condition influences the evaluation of optic disc photographs for morphologic features and glaucoma likelihood in a general ophthalmologist population from multicenters on a cloud-based platform. Methods: A cross-sectional study of 519 pairs of stereoscopic and monoscopic photographs of optic discs with adequate quality were selected and presented using a cloud-based platform. A total of 21 general ophthalmologists from 14 centers assessed 15 morphologic features based on 5R's rules and estimated glaucoma likelihood for each assigned photograph. There were 93 pairs of stereoscopic and monoscopic photographs evaluated by a panel of glaucoma specialists and set as ground truth. The main outcome measures were the agreement between estimates and ground truth and the inter-grader agreements. Results: There were good agreements between ground truth and both monoscopic and stereoscopic estimates (stereo κ 0.532 and mono κ 0.494). There was also a substantial intra-grader agreement between monoscopic and stereoscopic evaluation of glaucoma likelihood (κ 0.636). In eyes with probable glaucoma, the accuracy of the stereo method was greater than that of the mono method (stereo 0.238 vs. mono 0.118) When compared with ground truth, stereoscopic photographs had a better agreement for disc size (stereo κ 0.447 vs. mono κ 0.183), disc color (stereo κ 0.612 vs. mono κ 0.549), neuroretinal rim shape (stereo κ 0.356 vs. mono κ 0.274) on the whole. The stereoscopic method also had a better inter-grade agreement for disc size, disc color, neuroretinal rim shape, and glaucoma likelihood (stereo κ 0.402 vs. mono κ 0.359) on the whole. Conclusions: In the evaluation of optic disc photographs for morphologic features and glaucoma likelihood, the stereoscopic method showed superiority compared to the monoscopic method for general ophthalmologists. The stereoscopic method is more likely to identify glaucomatous eyes which need medical intervention.

10.
Front Psychol ; 12: 789505, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-35185691

RESUMEN

PURPOSE: The COVID-19 pandemic that began in 2019 has had a significant impact on people's learning and their lives, including a significant increase in the incidence of academic procrastination and negative emotions. The topic of how negative emotions influences academic procrastination has been long debated, and previous research has revealed a significant relationship between the two. The purpose of this study was to further investigate the mediating and buffering effects of online-shopping addiction on academic procrastination and negative emotions. METHODS: The researchers conducted a correlation analysis followed by a mediation analysis and developed a mediation model. The study used stratified sampling and an online questionnaire as the data collection method. In this study, first, five freshmen students at vocational and technical colleges in Guangdong Province, China, were called to distribute the questionnaire. Second, after communicating with them individually, first-year students of Guangdong origin were selected as participants. Finally, 423 freshman students participated by completing the questionnaire. The questionnaire consisted of 4 parts: demographic information, an online-shopping-addiction scale, an academic-procrastination scale and a negative-emotions scale. A total of 423 students, 118 males (27.9%) and 305 females (72.1%) from 10 vocational and technical colleges in Guangdong were surveyed. SPSS 25.0 was used to process and analyze the data. The data collected were self-reported. RESULTS: The results showed that: first, academic procrastination was significantly and positively associated with online-shopping addiction (r = 0.176, p < 0.01). Second, academic procrastination was significantly and positively associated with negative emotions (r = 0.250, p < 0.01). Third, online-shopping addiction was significantly and positively associated with negative emotions (r = 0.358, p < 0.01). In addition, academic procrastination had a significant positive predictive effect on online-shopping addiction (ß = 0.1955, t = 3.6622, p < 0.001). Online-shopping addiction had a significant positive predictive effect on negative emotions (ß = 0.4324, t = 7.1437, p < 0.001). CONCLUSION: This study explored the relationship between students' academic procrastination, negative emotions, and online-shopping addiction during the COVID-19 pandemic. The results indicated that students' level of academic procrastination positively influenced their level of online-shopping addiction and negative emotions, and their level of online-shopping addiction increased their negative emotions. In addition, there was a mediating effect between the degree of participants' online-shopping addiction and their degree of academic procrastination and negative emotions during the pandemic. In other words, with the mediating effect of online-shopping addiction, the higher the level of a participant's academic procrastination, the more likely that the participant would have a high score for negative emotions.

11.
J Diabetes Investig ; 12(11): 2054-2061, 2021 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-34002934

RESUMEN

AIMS/INTRODUCTION: Sarcopenia has recently been recognized as another complication associated with diabetes, but its early screening still lacks clinical markers. Here, we aimed to investigate the relationship between serum levels of pentosidine, which is an advanced glycation end-product, and sarcopenia in Chinese middle-aged and elderly men with type 2 diabetes mellitus and evaluate whether pentosidine could be used as a kind of screening maker. MATERIALS AND METHODS: A total of 182 male type 2 diabetes mellitus patients aged ≥50 years were selected in the cross-sectional study for whole-body dual-energy X-ray measurement and calculating the appendicular skeletal muscle mass index. At the same time, handgrip strength and gait speed were assessed. According to the updated consensus on Asian sarcopenia in 2019, the patients were divided into the sarcopenia group (n = 83) and non-sarcopenia group (n = 99). Serum pentosidine levels in the two groups were detected using enzyme-linked immunosorbent assay. RESULTS: Serum pentosidine was significantly higher in the sarcopenia group (191.27 pmol/mL) than in the non-sarcopenia group (34.93 pmol/mL). Serum pentosidine was negatively correlated with appendicular skeletal muscle mass index and handgrip strength (r = -0.30 and -0.25, respectively; P < 0.05), but not gait speed. The prevalence of sarcopenia increased as the quartile of serum pentosidine increased (P < 0.05). The association between pentosidine and the prevalence of sarcopenia was still significant after additional adjustments (odds ratio 1.01, P < 0.05). CONCLUSIONS: Pentosidine is an independent risk factor for sarcopenia in Chinese middle-aged and elderly men with type 2 diabetes mellitus. The detection of serum pentosidine levels in clinics might be helpful for the monitoring of type 2 diabetes mellitus complicated with sarcopenia.


Asunto(s)
Arginina/análogos & derivados , Diabetes Mellitus Tipo 2/sangre , Evaluación Geriátrica/métodos , Lisina/análogos & derivados , Medición de Riesgo/métodos , Sarcopenia/diagnóstico , Anciano , Arginina/sangre , China/epidemiología , Estudios Transversales , Diabetes Mellitus Tipo 2/complicaciones , Fuerza de la Mano , Humanos , Lisina/sangre , Masculino , Persona de Mediana Edad , Prevalencia , Factores de Riesgo , Sarcopenia/epidemiología , Sarcopenia/etiología
12.
Carbohydr Polym ; 269: 118336, 2021 Oct 01.
Artículo en Inglés | MEDLINE | ID: mdl-34294346

RESUMEN

A pot experiment was conducted to explore the effects of high-quality (Huanghuazhan, HH), drought-resistant (IR, IRAT109) and drought-susceptible cultivars (ZS, Zhenshan97) under flooding irrigation and dry cultivation (D) on the starch accumulation and synthesis, physicochemical traits of starch granules and rice grain quality at the upper (U) and lower panicle. Under D treatment, IR and ZS had lower rice quality, especially the appearance and cooking quality. DHH-U had the highest appearance, nutritional and cooking quality among all cultivars under D treatment, which could be ascribed to the synthesis of more short-branch chain amylopectin and correspondingly higher starch granule tightness. DHH-U also maintained ordered carbohydrate structure, crystalline regions, and many hydrophilic and hydrophobic functional groups in starch granules before pasting. It could prevent the polymerization of small molecules to avoid the formation of macromolecules after pasting. Overall, these findings may facilitate the improvement of grain quality in rice dry cultivation.


Asunto(s)
Grano Comestible/crecimiento & desarrollo , Oryza/crecimiento & desarrollo , Almidón/biosíntesis , Riego Agrícola/métodos , Sequías , Grano Comestible/metabolismo , Harina , Calidad de los Alimentos , Inflorescencia/crecimiento & desarrollo , Inflorescencia/metabolismo , Oryza/metabolismo , Almidón/química
14.
Diabetes Res Clin Pract ; 161: 108068, 2020 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-32044349

RESUMEN

AIM: The relationship between serum Metrnl levels and visceral fat obesity (VFO) remains unclear. This study aimed to investigate the association between serum Metrnl levels and VFO in Chinese patients with type 2 diabetes. METHODS: A total of 321 Chinese patients with type 2 diabetes (226 men and 95 postmenopausal women aged 61.4 ± 6.5 years, BMI 25.1 ± 3.2 kg/m2) were evaluated. Serum Metrnl levels were measured by enzyme linked-immunosorbent assay. Visceral fat area (VFA) was quantified via Dual Energy X-ray Absorptiometry (DXA). Correlation analyses were carried out for serum Metrnl levels and VFO. RESULTS: VFO groups (VFA ≧100 cm2) have lower serum Metrnl levels than non-VFO groups (VFA < 100 cm2) (578.9 ± 225.1 vs. 684.9 ± 263.8, P = 0.001). An increasing trend in serum Metrnl levels was found to accompany the decrease in VFA. Serum Metrnl levels were negatively correlated with VFA, total cholesterol (TC), triglyceride (TG), low-density lipoprotein cholesterol (LDL-C) and albumin (ALB), but positively correlated with age, height, blood urea nitrogen (BUN), creatinine (Cr) and uric acid (UA) (all P < 0.05). Binary logistic regression analysis showed that serum Metrnl was inversely associated with VFO even after adjusted age, gender, height, TC, TG, LDL-C, ALB, BUN, Cr, and UA (odds ration [OR], 0.846; confidence interval [CI], 0.745-0.961; P = 0.010). The optimal cut-off value of serum Metrnl levels that predicted VFO was 671.3 ng/ml (95%CI = 0.55-0.70, P = 0.001). CONCLUSIONS: Serum Metrnl levels were inversely correlated with VFO and may be a useful indicator of VFO in Chinese patients with type 2 diabetes.


Asunto(s)
Adipoquinas/sangre , Diabetes Mellitus Tipo 2/sangre , Grasa Intraabdominal/metabolismo , Obesidad Abdominal/sangre , Estudios Transversales , Diabetes Mellitus Tipo 2/complicaciones , Femenino , Humanos , Masculino , Persona de Mediana Edad
15.
J Microbiol Biotechnol ; 30(5): 668-680, 2020 May 28.
Artículo en Inglés | MEDLINE | ID: mdl-32482932

RESUMEN

Bacillus velezensis is an important plant growth-promoting rhizobacterium with immense potential in agriculture development. In the present study, Bacillus velezensis Lle-9 was isolated from the bulbs of Lilium leucanthum. The isolated strain showed antifungal activities against plant pathogens like Botryosphaeria dothidea, Fusarium oxysporum, Botrytis cinerea and Fusarium fujikuroi. The highest percentage of growth inhibition i.e., 68.56±2.35% was observed against Fusarium oxysporum followed by 63.12 ± 2.83%, 61.67 ± 3.39% and 55.82 ± 2.76% against Botrytis cinerea, Botryosphaeria dothidea, and Fusarium fujikuroi, respectively. The ethyl acetate fraction revealed a number of bioactive compounds and several were identified as antimicrobial agents such as diketopiperazines, cyclo-peptides, linear peptides, latrunculin A, 5α-hydroxy-6-ketocholesterol, (R)-S-lactoylglutathione, triamterene, rubiadin, moxifloxacin, 9-hydroxy-5Z,7E,11Z,14Zeicosatetraenoic acid, D-erythro-C18-Sphingosine, citrinin, and 2- arachidonoyllysophosphatidylcholine. The presence of these antimicrobial compounds in the bacterial culture might have contributed to the antifungal activities of the isolated B. velezensis Lle- 9. The strain showed plant growth-promoting traits such as production of organic acids, ACC deaminase, indole-3-acetic acid (IAA), siderophores, and nitrogen fixation and phosphate solubilization. IAA production was accelerated with application of exogenous tryptophan concentrations in the medium. Further, the lily plants upon inoculation with Lle-9 exhibited improved vegetative growth, more flowering shoots and longer roots than control plants under greenhouse condition. The isolated B. velezensis strain Lle-9 possessed broad-spectrum antifungal activities and multiple plant growth-promoting traits and thus may play an important role in promoting sustainable agriculture. This strain could be developed and applied in field experiments in order to promote plant growth and control disease pathogens.


Asunto(s)
Antifúngicos , Bacillus , Endófitos , Lilium/microbiología , Reguladores del Crecimiento de las Plantas , Antifúngicos/química , Antifúngicos/farmacología , Bacillus/química , Bacillus/fisiología , Productos Biológicos/química , Productos Biológicos/farmacología , Endófitos/química , Endófitos/fisiología , Reguladores del Crecimiento de las Plantas/química , Reguladores del Crecimiento de las Plantas/farmacología
16.
Int J Clin Exp Pathol ; 12(8): 2858-2866, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-31934122

RESUMEN

The toxicologic effects of diesel exhaust particles (DEPs) on lung cells and function have been heavily studied. However, it remains largely unknown how DEPs affect the function of pancreatic beta cells. In this study, wedemonstrated that DEP extract (DPE) exposure significantly reduces cell viability, insulin secretion, and ATP and GSH production of rat pancreatic beta cells. Also, DPEs induce the accumulation of ROS, p53 expression, and DNA damage in beta cells. In addition, the expression level of miR-140-5p was downregulated in beta cells following DPE exposure, and ectopic expression of miR-140-5p could partly attenuate the toxic effects of DPEs. Mechanistically, HDCA4 and HDCA7 were downstream targets of miR-140-5p. In conclusion, our findingsdemonstrate that DPE exposure impairs the normal functions of beta cells by downregulating miR-140-5p. Further studies are warranted to explore the toxic effects of circulating DEPs on the pancreas.

17.
Stem Cells Int ; 2019: 1705629, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-31467558

RESUMEN

Adipose stem cells (ASCs) are an attractive cell source for treating many human diseases including osteoporosis. However, the molecular mechanisms accounting for ASC osteogenesis are poorly known. In this study, ASCs were first isolated from the fat tissues from the patients with osteoporosis. The global transcriptome profile between osteogenic differentiated ASCs and undifferentiated ASCs was compared using RNA sequencing (RNA-seq). Then, bioinformatic analysis was performed to reveal the central genes and pathways that regulated the osteogenic differentiation of ASCs. One of the interested genes C5AR1 was chosen for further investigation. A total of 1521 upregulated and 3020 downregulated genes were identified between the ASCs with osteogenic induction and controls. Functional gene ontology analysis revealed that these significantly differentially expressed genes (DEGs) were associated with cell cycle, protein binding, and nucleotide binding. Pathway analysis showed that many canonical pathways, such as the MAPK signaling pathway and the PI3K-AKT pathway, might actively be involved in regulating osteogenic differentiation of ASCs. A total of three subnetworks and 20 central nodes were identified by the protein-protein interaction analysis. In addition, the expression level of C5AR1 was significantly increased during osteogenic differentiation of ASCs. The downregulation of C5AR1 dramatically reduced the expression levels of osteogenic differentiation biomarkers and calcium nodule formation capacity. Collectively, we have provided a number of novel genes and pathways that might be indispensable for ASC osteogenic differentiation. Manipulating the levels of this candidate gene might contribute to the osteoporosis therapy.

18.
ACS Omega ; 4(7): 12319-12324, 2019 Jul 31.
Artículo en Inglés | MEDLINE | ID: mdl-31460349

RESUMEN

Surface-enhanced Raman spectroscopy (SERS) has been utilized for rapid analysis of uranyl ions (UO2 2+) on account of its fast response and high sensitivity. However, the difficulty of fabricating a suitable SERS substrate for in situ analysis of uranyl ions severely restricts its practical application. Hence, we proposed flexible and adhesive SERS tape decorated with silver nanorod (AgNR) arrays for in situ detection of UO2 2+. The SERS tape was fabricated through a simple "paste & peel off" procedure by transferring the slanted AgNR arrays from silicon to the transparent tape surface. UO2 2+ can be easily in situ detected by placing the AgNR SERS tape into an aqueous solution or pasting it onto the solid matrix surface due to the excellent transparent feature of the tape. The proposed SERS tape with well-distributed AgNRs effectively improved the reproducibility and sensitivity for UO2 2+ analysis. UO2 2+ with concentration as low as 100 nM was easily detected. Besides, UO2 2+ adsorbed on an iron disc and rock surface also can be rapidly in situ detected. With its simplicity and convenience, the AgNR SERS tape-based SERS technique offers a promising approach for environmental monitoring and nuclear accident emergency detection.

19.
Anal Chim Acta ; 986: 115-121, 2017 Sep 15.
Artículo en Inglés | MEDLINE | ID: mdl-28870315

RESUMEN

A novel fluorescent detection strategy for simultaneous detection of Cu2+, Pb2+ and Mg2+ based on DNAzyme branched junction structure with three kinds of DNAzymes and graphene oxide (GO) was presented. Three fluorophores labeled DNA sequences consisted with enzyme-strand (E-DNA) and substrate strand (S-DNA) were annealed to form DNAzyme branched junction structure. In the presence of target metal ion, the DNAzyme was activated to cleave the fluorophore labeled S-DNA. The S-DNA fragments were released and adsorbed onto GO surface to quench the fluorescent signal. The detection limit was calculated to be 1 nM for Cu2+, 200 nM for Mg2+, and 0.3 nM for Pb2+, respectively. This strategy was successfully used for simultaneous detection of Cu2+, Mg2+ and Pb2+ in human serum. Moreover, it had potential application for simultaneous detection of multiple metal ions in environmental and biological samples.


Asunto(s)
Técnicas Biosensibles , ADN Catalítico/química , Fluorescencia , Grafito , Metales/análisis , Humanos , Iones , Metales Pesados/sangre , Óxidos
20.
Cancer Biother Radiopharm ; 32(6): 221-226, 2017 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-28820635

RESUMEN

AIM: To evaluate the efficacy and safety of postoperative adjuvant immunotherapy with cytokine-induced killer (CIK) cells in combination with chemotherapy (CT) in colorectal cancer (CRC) patients. MATERIALS AND METHODS: A total of 46 patients were randomly assigned to either group 1 (control group) or group 2 (CIK group) using blocked randomization. Both groups received the FOLFOX4 (5-fluorouridine, leucovorin, and oxaliplatin) CT. In the CIK group, patients were given CIK cell infusion after FOLFOX4 CT. Treatment efficacy, adverse effects, and quality of life (QOL) were assessed. RESULTS: During the first 2 years of follow-up, the recurrence rate in the CIK group (26.1%, 6 in 23 cases) was significantly lower than the control group (43.5%, 10 in 23). The survival time was significantly longer in the CIK group (41.9 months, 95% confidence interval [CI]: 38.2-45.7) than in the control group (33.8 months, 95% CI: 28.4-39.2). Although QOL was reduced in both treatment groups, adjuvant CIK cell transfusion significantly improved the QOL in patients with CRC. Toxicity was mild in patients with CIK treatment. CONCLUSIONS: Immunotherapy with CIK cells may serve as an adjuvant treatment in patients with CRC after CT with prolonged survival of patients, limited side-effects, and improved QOL.


Asunto(s)
Neoplasias Colorrectales/genética , Células Asesinas Inducidas por Citocinas/metabolismo , Inmunoterapia/métodos , Neoplasias Colorrectales/mortalidad , Neoplasias Colorrectales/terapia , Femenino , Humanos , Persona de Mediana Edad , Estudios Prospectivos , Calidad de Vida , Análisis de Supervivencia
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