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1.
J Am Chem Soc ; 146(14): 10167-10176, 2024 Apr 10.
Artículo en Inglés | MEDLINE | ID: mdl-38536043

RESUMEN

The π-bond enrichment frameworks not only serve as a crucial building block in organic synthesis but also assume a pivotal role in the fields of materials science, biomedicine, photochemistry, and other related disciplines owing to their distinctive structural characteristics. The incorporation of various substituents into the C═C double bonds of tetrasubstituted alkenes is currently a highly significant research area. However, the synthesis of tetrasubstituted alkenes with diverse substituents on double bonds poses a significant challenge in achieving stereoselectivity. Here, we reported an efficient and convergent route of Cu-catalyzed borylalkynylation of both symmetrical and unsymmetrical 1,3-diynes, B2pin2, and acetylene bromide to the construction of boronated phenyldiethynylethylene (BPDEE) derivatives with excellent chemo-, stereo-, and regioselectivities. BPDEE derivatives could transform into novel tetrasubstituted organic π-conjugated gem-diphenyldiethynylethylene (DPDEE), vinylphenyldiethynylethylene (VPDEE), and phenyltriethynylethylene (PTEE) derivatives by a stepwise process, which provides a flexible platform for the synthesis of complex π-bond enrichment frameworks that were difficult to synthesize by previous methods. The initial optical characterization revealed that the synthesized molecules exhibited aggregation-induced emission (AIE) properties, which further establishes the groundwork for future applications and enriches and advances the field of functional π-conjugated frameworks research.

2.
Transfus Apher Sci ; 63(3): 103938, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38678984

RESUMEN

OBJECTIVE: This study aims to report two unrelated individuals with the same novel CisAB blood type and confirm this rare blood type using a comprehensive approach that combines serological and molecular biology techniques. METHODS: Peripheral blood samples were collected from two patients and their family members. ABO blood typing and antibody detection were performed using conventional tube methods. Molecular biology techniques were employed to amplify and sequence the 6th and 7th exons of the ABO gene, with reference to gene mutation databases provided by NCBI and ISBT. RESULTS: The genotypes of the two unrelated individuals were identical and were confirmed as a new genotype through ISBT gene database comparison. Serological testing results showed different antigen reaction patterns, especially in terms of reverse typing. Gene sequencing identified a series of mutation points, and both unrelated individuals and one of their daughters had mutations at 297 A>G, 526 C>G, 657 C>T, 703 G>A, 803 G>C, and 930 G>A. According to the comprehensive results from The Blood Group Antigen Gene Mutation Database provided by NCBI, the genotype was determined as Bw37. However, based on the results from Names for ABO (ISBT 001) blood group alleles v1.1 171023, the sequencing results indicated a novel mutation combination not found in the ISBT database. Considering the serological reactions of all three individuals, the final determination was CisAB. CONCLUSIONS: This study confirmed the novel CisAB blood type in two individuals through the comprehensive application of serology and molecular biology techniques. The identified gene mutation points were not recorded in known databases, emphasizing the uniqueness of CisAB blood types. This research provides important insights into the genetic basis of ABO subtypes and the characteristics of CisAB blood types, and the relevant results have been submitted to the ISBT website for further research.


Asunto(s)
Sistema del Grupo Sanguíneo ABO , Humanos , Sistema del Grupo Sanguíneo ABO/genética , Femenino , Masculino , Tipificación y Pruebas Cruzadas Sanguíneas/métodos , Adulto , Genotipo
3.
Clin Lab ; 70(3)2024 Mar 01.
Artículo en Inglés | MEDLINE | ID: mdl-38469785

RESUMEN

BACKGROUND: The aim was to analyze the serological and molecular genetic characteristics of a rare B(A) subtype pedigree, explore its pathogenesis, and discuss transfusion strategies. METHODS: ABO blood typing serological tests were conducted on a female subject and her family member using standard serological methods. Sequencing analysis of the ABO gene exons 6 and 7 was performed using PCR technique for the female subject and her family member to examine the blood types of the participants. RESULTS: The serological test results showed a discrepancy between the forward and reverse typings of the female subject. The forward typing was similar to that of AB subtype serological forward typing, while the reverse typing indicated AB blood type. Based on the sequencing results, it is inferred that the female subject and her son have 8 mutations on one BA.02 chain: 297A>G, 526C>G, 657C>T, 700C>G, 703G>A, 796C>A, 803G>C, and 930G>A. Comparing these eight mutation sites with the Blood Group Antigen Gene Mutation Database (BGMUT), it was found that the female subject had a heterozygous mutation at c.700C>G in the 7th exon of the B.01 gene, consistent with the characteristics of the BA.02 allele. The genotype of the female subject was determined as A1.02/ BA.02, while the genotype of her son was determined as O.01.01/BA.02. CONCLUSIONS: The serological presentation of the B(A) subtype for the female subject reported in this study was unique. It differed from previously reported cases, indicating that the determination of B(A) subtypes cannot solely rely on serological testing. It requires a comprehensive analysis combining the results of genetic testing and pedigree investigation.


Asunto(s)
Sistema del Grupo Sanguíneo ABO , Transfusión Sanguínea , Humanos , Femenino , Sistema del Grupo Sanguíneo ABO/genética , Genotipo , Heterocigoto , Mutación , Alelos , Fenotipo
4.
Clin Lab ; 69(1)2023 Jan 01.
Artículo en Inglés | MEDLINE | ID: mdl-36649506

RESUMEN

BACKGROUND: The goal was to identify a novel FUT1 allele and to study serologic and gene feature of the para-Bombay blood type of one expectant mother in Xinjiang, China. METHODS: ABO and Lewis groups were recognized by standard serologic techniques in an ABO typing discrepancy specimen from one person at the Tianjin Blood Center. DNA (deoxyribonucleic acid) was collected and polymerase chain reactions with sequence-specific primers (PCR-SSP) were performed to sequence exons 6 and 7 of ABO gene, exon 4 of FUT1 gene, and exon 2 of FUT2. PCR products were sequenced to identify ABO groups and the variation sites. The genotype was determined by family study. RESULTS: In our laboratory testing, erythrocytes from the proposita did not react with anti-A and anti-B reagents. B antigen was discovered only after adsorption and elution. Red cells were nonreactive with monoclonal anti-H. The sera of the proposita contained anti-A and were weakly agglutinated by B cells. The hybrid 902 A>G mutation was detected in the proposita's father and mother. The proposita has the same mutation 902 A>G, which was conjectured as homozygosity for 902 A>G. CONCLUSIONS: One novel mutation of FUT1 gene was observed in our laboratory. It has never been reported previously. The para-Bombay phenotype in the proposita originating from Xinjiang (China) results from homozygosity for FUT1 902 A>G, together with 357 C>T of FUT2.


Asunto(s)
Pueblos del Este de Asia , Fucosiltransferasas , Humanos , Sistema del Grupo Sanguíneo ABO/genética , Alelos , Pueblos del Este de Asia/genética , Fucosiltransferasas/genética , Genotipo , Fenotipo , China , Galactósido 2-alfa-L-Fucosiltransferasa
5.
Eur Arch Otorhinolaryngol ; 280(5): 2463-2470, 2023 May.
Artículo en Inglés | MEDLINE | ID: mdl-36571612

RESUMEN

OBJECTIVES: The primary goal of this study was to examine the ultrasound and cytological characteristics of inconsistent cases (false negatives and false positives)of ultrasound-guided fine-needle aspiration cytology (US-FNAC) of cervical lymph nodes, to investigate factors influencing the diagnostic accuracy of fine-needle aspiration, and to improve diagnostic efficiency. METHODS: The results of US and FNAC of cervical lymph nodes in 562 cases treated at our institution from February 2019 to June 2021 were retrospectively analyzed. FNAC cytology results were compared with the final diagnostic results (242 surgical resections/core-needle biopsy, 320 cases followed up for more than 1 year), and the final diagnostic results were taken as the gold standard, and the ultrasound features and clinicopathology-related features were systematically retrospectively analyzed in cases of inconsistency. RESULTS: The overall diagnostic accuracy of US-FNAC for cervical lymph nodes was 94.9%, with a false-negative rate of 6.7% and a false-positive rate of 3.8%. Analyzing the cases, sampling error due to factors associated with ultrasound features, such as larger, more numerous nodes, non-solid, hypoechoic, inhomogeneous, and increased vascularity are the main causes of false-negative diagnosis, while smaller nodules, overlapping cytologic patterns, and overinterpretation by pathologists are associated with false-positive FNAC results. CONCLUSIONS: Proper interpretation of cytomorphologic and ultrasound features can improve diagnostic accuracy, and diagnostic misdiagnosis should be carefully observed, the identification of both features should be enhanced to reduce interpretation errors and sampling errors and to reduce the rate of misdiagnosis and missed diagnoses in fine needle aspiration of lymph nodes.


Asunto(s)
Ganglios Linfáticos , Ultrasonografía Intervencional , Humanos , Biopsia con Aguja Fina/métodos , Estudios Retrospectivos , Metástasis Linfática/diagnóstico por imagen , Metástasis Linfática/patología , Ganglios Linfáticos/patología , Ultrasonografía Intervencional/métodos , Sensibilidad y Especificidad
6.
Plant Dis ; 107(8): 2506-2508, 2023 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-36774571

RESUMEN

Streptomyces atratus PY-1 exhibited promising antimicrobial properties; in particular, it is highly inhibitory to Plasmopara viticola, which causes downy mildew of grape. It is very necessary to carry out systematic and in-depth research on the PY-1 strain for the improvement, application, and promotion of biocontrol agents. The PY-1 genome was fully sequenced and assembled. We present the draft genome sequence of PY-1, with a size of 9, 254, and 781 bp. Preliminary analysis on the PY-1 genome sequence shows that at least 35 gene clusters are involved in the biosynthesis of polyketides, terpenes, and nonribosomally synthesized peptides.


Asunto(s)
Antiinfecciosos , Oomicetos , Peronospora , Enfermedades de las Plantas/genética , Oomicetos/genética , Antiinfecciosos/farmacología
7.
Int J Mol Sci ; 24(18)2023 Sep 18.
Artículo en Inglés | MEDLINE | ID: mdl-37762513

RESUMEN

Salicylic acid (SA) serves as a pivotal plant hormone involved in regulating plant defense mechanisms against biotic stresses, but the extent of its biological significance in relation to peanut resistance is currently lacking. This study elucidated the involvement of salicylic acid (SA) in conferring broad-spectrum disease resistance in peanuts through the experimental approach of inoculating SA-treated leaves. In several other plants, the salicylate hydroxylase genes are the typical susceptible genes (S genes). Here, we characterized two SA hydroxylase genes (AhS5H1 and AhS5H2) as the first S genes in peanut. Recombinant AhS5H proteins catalyzed SA in vitro, and showed SA 5-ydroxylase (S5H) activity. Overexpression of AhS5H1 or AhS5H2 decreased SA content and increased 2,5-DHBA levels in Arabidopsis, suggesting that both enzymes had a similar role in planta. Moreover, overexpression of each AhS5H gene increased susceptibility to Pst DC3000. Analysis of the transcript levels of defense-related genes indicated that the expression of AhS5H genes, AhNPR1 and AhPR10 was simultaneously induced by chitin. Overexpression of each AhS5H in Arabidopsis abolished the induction of AtPR1 or AtPR2 upon chitin treatment. Eventually, AhS5H2 expression levels were highly correlated with SA content in different tissues of peanut. Hence, the expression of AhS5H1 and AhS5H2 was tissue-specific.


Asunto(s)
Arabidopsis , Arachis , Arachis/genética , Arabidopsis/genética , Quitina , Resistencia a la Enfermedad/genética , Ácido Salicílico/farmacología
8.
Int J Hyperthermia ; 39(1): 155-161, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35000496

RESUMEN

OBJECTIVES: This study aimed to determine the performance of Sonazoid-based contrast-enhanced ultrasound (CEUS) in the microwave ablation (MWA) of primary hyperparathyroidism (pHPT). METHODS: Forty patients with pHPT were enrolled and treated with percutaneous ultrasound (US)-guided MWA assisted by CEUS. All patients underwent immediate CEUS examinations following MWA. On post-ablation day 1, patients who did not display a decrease in intact parathyroid hormone (iPTH) levels to the norm were examined by CEUS to evaluate an incomplete ablation. We compared the serum iPTH and calcium levels and the nodule volumes before and after MWA. The complications were evaluated during and after treatment. RESULTS: Immediately following MWA, CEUS demonstrated complete ablation with all 44 parathyroid nodules. On post-ablation day 1, five nodules in five patients displayed annular enhancement around the ablation zone on CEUS. The average maximum diameters of the nodules and the ablation zone were 1.09 ± 0.28 cm and 1.36 ± 0.23 cm, respectively. An ablation zone larger than the primary lesion (p < 0.05) generated a higher rate of complete ablation. Compared with pre-MWA, serum iPTH and calcium levels were significantly improved. Treatment success was achieved in 38 patients (95%). Hoarseness was a major complication in six patients (15%); however, it improved spontaneously within 1-4 months. We observed two recurrences (2/40, 5%) at 9 months and 11 months following MWA, respectively. CONCLUSION: US-guided percutaneous MWA assisted by CEUS for pHPT is an effective and safe therapy. CEUS can avoid operative failure and improve the cure rate.


Asunto(s)
Hiperparatiroidismo Primario , Compuestos Férricos , Humanos , Hiperparatiroidismo Primario/diagnóstico por imagen , Hiperparatiroidismo Primario/cirugía , Hierro , Microondas , Óxidos , Estudios Retrospectivos , Ultrasonografía , Ultrasonografía Intervencional
9.
Zhonghua Yi Xue Yi Chuan Xue Za Zhi ; 39(5): 546-547, 2022 May 10.
Artículo en Zh | MEDLINE | ID: mdl-35598276

RESUMEN

OBJECTIVE: To explore the molecular reasons of weak expression of B antigen on the red cell. METHODS: Serological test for blood group was carried out, including red cell and plasma grouping, and anti-A1 and anti-H testing, and confirming weak A or B antigens by adsorption and elution. Exons 1-7 were sequenced directly, and one of them was cloned and sequenced. RESULTS: All of the 23 samples showed the weak B antigen by serological method. The alleles of the subgroups were identified by DNA sequencing, including 2 Bel subgroup, 4 B3 subgroup, 14 Bw subgroup, 2 CisAB subgroup and a novel allele. The novel allele showed a nucleotide substitution 662G>A in the exon 7, and the sequence was submitted to Blood Group Antigen Gene Mutation Database, and the novel allele was named Bel10. CONCLUSION: Nucleotide substitution in exon results in blood subgroup, which showed that the antigens were weakened, and Bw phenotype was the most frequently subgroup.


Asunto(s)
Sistema del Grupo Sanguíneo ABO , Nucleótidos , Sistema del Grupo Sanguíneo ABO/genética , Alelos , Exones , Genotipo , Humanos , Fenotipo
10.
Neuroimage ; 141: 10-17, 2016 Nov 01.
Artículo en Inglés | MEDLINE | ID: mdl-27423256

RESUMEN

Phosphodiesterase 10A (PDE10A) is selectively expressed in the striatal regions in the brain and may play a role in modulating dopaminergic and glutamatergic second messenger pathways. PDE10A inhibitors are expected to be useful in treating neuropsychiatric disorders such as schizophrenia and Huntington's disease. In this study, the brain kinetics of [(11)C]T-773 in the human brain and test-retest reproducibility of the outcome measures were evaluated. Subsequently, the occupancy of a novel PDE10A inhibitor, TAK-063, was measured using [(11)C]T-773. Dynamic PET measurements were conducted three times for 12 healthy male subjects after intravenous bolus injection of [(11)C]T-773: two baseline PETs and one postdose PET (3hours) after oral administration of TAK-063 for four subjects, and one baseline PET and two postdose PET (3hours and 23hours) for eight subjects. Kinetic model analysis was performed with arterial input functions. PDE10A occupancy was calculated as the percent change of the binding specific to PDE10A (Vs) total distribution volume (VT), which was calculated as the VT of the putamen minus the VT of the cerebellum. Regional brain uptake was highest in the putamen. Time-activity curves of the brain regions were described with two tissue-compartment (2TC) models. The mean VT was 5.5±0.7 in the putamen and 2.3±0.5 in the cerebellum in the baseline PET. Absolute VT variability between the two baseline scans was less than 7%. Reproducibility of VT was excellent. PDE10A occupancy in the putamen ranged from 2.8% to 72.1% at 3hours after a single administration of 3 to 1000mg of TAK-063, and increased in a dose- and plasma concentration-dependent manner. At 23hours postdose, PDE10A occupancy in the putamen was 0 to 42.8% following administration of 3 to 100mg of TAK-063. In conclusion, [(11)C]T-773 showed good characteristics as a PET radioligand for PDE10A in the human brain.


Asunto(s)
Encéfalo/efectos de los fármacos , Encéfalo/metabolismo , Imagen Molecular/métodos , Hidrolasas Diéster Fosfóricas/metabolismo , Pirazoles/administración & dosificación , Pirazoles/farmacocinética , Piridazinas/administración & dosificación , Piridazinas/farmacocinética , Administración Oral , Adulto , Relación Dosis-Respuesta a Droga , Monitoreo de Drogas , Humanos , Masculino , Tasa de Depuración Metabólica/efectos de los fármacos , Persona de Mediana Edad , Inhibidores de Fosfodiesterasa/administración & dosificación , Hidrolasas Diéster Fosfóricas/efectos de los fármacos , Tomografía de Emisión de Positrones/métodos , Unión Proteica , Radiofármacos/farmacocinética , Reproducibilidad de los Resultados , Sensibilidad y Especificidad , Distribución Tisular/efectos de los fármacos
11.
Medicine (Baltimore) ; 103(25): e38467, 2024 Jun 21.
Artículo en Inglés | MEDLINE | ID: mdl-38905393

RESUMEN

INTRODUCTION: Inefficient blood transfusions present a significant challenge, leading to the wastage of crucial blood resources and increased medical expenses. This study aims to address this issue by providing a comprehensive analysis of a case involving an ineffective clinical transfusion and outlining the significance of identifying multiple alloantibodies in resolving transfusion challenges. CASE REPORT: We present a detailed follow-up on a patient treatment journey, highlighting the critical role of identifying multiple alloantibodies through various methodologies in addressing the transfusion problem. Subsequently, a strategic intervention was implemented, leading to a successful patient outcome. CONCLUSION: This study underscores the importance of conducting a thorough analysis of ineffective transfusions and implementing scientifically formulated transfusion plans based on rational explanations. Such an approach not only improves hemoglobin levels but also contributes to better patient outcomes, thereby reducing blood resource wastage and medical costs.


Asunto(s)
Reacción a la Transfusión , Humanos , Isoanticuerpos/sangre , Isoanticuerpos/inmunología , Femenino , Masculino , Transfusión Sanguínea/métodos , Persona de Mediana Edad
12.
Quant Imaging Med Surg ; 14(6): 3828-3836, 2024 Jun 01.
Artículo en Inglés | MEDLINE | ID: mdl-38846300

RESUMEN

Background: The application of radiofrequency ablation (RFA) is becoming increasingly widespread in the treatment of primary hyperparathyroidism (PHPT). However, the effect of RFA treatment on the skeleton in mild PHPT remains unclear. Therefore, the aim of this study was to investigate the change in bone turnover markers and bone mineral density (BMD) before and 2 years after RFA in patients with mild PHPT. Methods: In this open-label, prospective study, 81 patients with mild PHPT including 36 treated with RFA and 45 observed without intervention (OBS), along with 81 age-matched healthy controls, were enrolled from November 2018 to September 2021 at Gansu Provincial Hospital. The main outcome measures were levels of serum calcium, serum intact parathyroid hormone (iPTH), and bone turnover markers, including bone-specific alkaline phosphatase (ALP), C-terminal cross-linking telopeptides of type I collagen (ß-CTx), and osteocalcin (OC). BMD (femoral neck and lumbar spine) was measured with dual-energy X-ray absorptiometry, and spine radiographs were obtained for vertebral fracture assessment. Paired and unpaired two-tailed t-tests and Spearman rank correlation coefficient were used for statistical analyses. Results: Normalized outcomes for both iPTH and calcium levels were achieved in 32 of 36 (88.9%) patients with mild PHPT treated with RFA. There was a significant treatment effect of RFA on bone turnover biomarkers compared with OBS before the treatment (P=0.04) and at the end of follow-up or (P=0.03). BMD of the lumbar spine increased by 1.8% (P=0.03) and remained stable in the femoral neck (P=0.17) after RFA. However, there was an obvious treatment effect of RFA on BMD compared with OBS (P 0.04). The only compartment with a T-score increase in the RFA group was the lumbar spine in (P<0.001). There was no difference in fracture frequency between groups during the follow-up period. Conclusions: RFA can improve serum bone turnover markers in patients with mild PHPT and can be expected to increase BMD in the L1-L4 vertebrae and preserve BMD in the femoral neck. Whether RFA can reduce fracture risk in the long-term is a clinical concern for patients with mild PHPT.

13.
Nat Commun ; 15(1): 5479, 2024 Jun 28.
Artículo en Inglés | MEDLINE | ID: mdl-38942777

RESUMEN

1,2-Difunctionalization of alkynes offers a straightforward approach to access polysubstituted alkenes. However, simultaneous multi-component cascade transformations including difunctionalization of two alkynes with both syn- and anti-selectivity in one catalyst system is undeveloped and proves to be a significant challenge. Herein, we report a Nickel-catalyzed four-component reaction to access polysubstituted 1,3-dienes using two terminal alkynes, aryl boroxines, and perfluoroalkyl iodides, wherein the reaction forms three new C-C bonds in a single vessel and serve as a modular strategy to access polysubstituted 1,3-dienes with excellent chemoselectivity, good regioselectivity and exclusive stereoselectivity. Control experiments reveal the plausible reaction mechanism and DFT calculations explain the cause for the formation of this unusual four-component reaction. Furthermore, we successfully incorporate two biologically active units into 1,2,3,4-tetrasubstituted 1,3-dienes, which greatly increases the diversity of molecular scaffolds and brings more potential values to medicinal chemistry, the synthetic utility of our protocol is further demonstrated by the late-stage transformations.

14.
J Fungi (Basel) ; 8(11)2022 Nov 20.
Artículo en Inglés | MEDLINE | ID: mdl-36422044

RESUMEN

A novel Bacillus amyloliquefaciens BAM strain, with novel fermentation nutrient mediums and compositions, could produce potent antifungal secondary metabolites, as the existing strains face resistance from fungus pathogens. In the current study, we introduced two novel nutrient mediums for the fermentation process, semolina and peanut root extract, as carbon and nitrogen sources in order to maximize the antifungal effects of B. amyloliquefaciens against Cercaspora arachidichola to control early leaf spot disease in peanuts. Based on a single-factor test and the central composite design of response surface methodology, the optimum fermentation medium for Bacillus amyloliquefaciens antagonistic substance was determined, containing 15 gm/L of semolina flour, 12.5 gm/L of beef extract, and 0.5 gm/L of magnesium sulfate, which inhibited the fungal growth by 91%. In vitro, antagonistic activity showed that the fermentation broth of B. amyloliquefaciens BAM with the optimized medium formulation had an inhibition rate of (92.62 ± 2.07)% on the growth of C. arachidichola. Disease control effects in pot experiments show that the pre-infection spray of B. amyloliquefaciens BAM broth had significant efficiency of (92.00 ± 3.79)% in comparison to post-infection spray. B. amyloliquefaciens BAM broth significantly promoted peanut plant growth and physiological parameters and reduced the biotic stress of C. archidechola. Studies revealed that B. amyloliquefaciens BAM with a novel fermentation formulation could be an ideal biocontrol and biofertilizer agent and help in early disease management of early leaf spots in peanuts.

15.
Curr Res Food Sci ; 5: 1873-1881, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-36276243

RESUMEN

Molecular simulation is a new technology to analyze the interaction between molecules. This review mainly summarizes the application of molecular simulation technology in the food industry. This technology has been employed to assess structural changes of biomolecules, the interaction between components, and the mechanism of physical and chemical property alterations. These conclusions provide a deeper understanding of the molecular interaction mechanism in foods, break through the limitations of scientific experiments and avoid blind and time-consuming scientific research. In this paper, the advantages and development trends of molecular simulation technology in the food research field are described. This methodology can be used to contribute to further studies of the mechanism of molecular interactions in food, confirm experimental results and provide new ideas for research in the field of food sciences.

16.
J Gen Virol ; 92(Pt 1): 181-7, 2011 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-20844090

RESUMEN

Kaposi's sarcoma-associated herpesvirus (KSHV) infection goes through latent and lytic phases, which are controlled by the viral replication and transcription activator (RTA). Upon KSHV infection, the host responds by suppressing RTA-activated lytic gene expression through interferon regulatory factor 7 (IRF-7), a key regulator of host innate immune response. Lysine residues are potential sites for post-translational modification of IRF-7, and were suggested to be critical for its activity. In this study, we analysed the 15 lysine residues for their effects on IRF-7 function by site-directed mutagenesis. We found that some mutations affect the ability of IRF-7 to activate interferon (IFN)-α1 and IFN-ß promoters, to suppress RTA-mediated lytic gene expression and to repress KSHV reactivation and lytic replication. However, other mutations affect only a subset of these four functions. These findings demonstrate that the lysine residues of IRF-7 play important roles in mediating IFN synthesis and modulating viral lytic replication.


Asunto(s)
Herpesvirus Humano 8/fisiología , Proteínas Inmediatas-Precoces/metabolismo , Factor 7 Regulador del Interferón/metabolismo , Lisina/metabolismo , Transactivadores/metabolismo , Transcripción Genética , Replicación Viral , Sustitución de Aminoácidos/genética , Animales , Chlorocebus aethiops , Factor 7 Regulador del Interferón/genética , Lisina/genética , Mutagénesis Sitio-Dirigida , ARN Mensajero/metabolismo , ARN Viral/metabolismo , Células Vero , Activación Viral
17.
Chin J Nat Med ; 18(6): 436-445, 2020 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-32503735

RESUMEN

This study investigated the effects of X-ray irradiation on primary rat cardiac fibroblasts (CFs) and its potential mechanism, as well as whether sodium tanshinone IIA sulfonate (STS) has protective effect on CFs and its possible mechanism. Our data demonstrated that X-rays inhibited cell growth and increased oxidative stress in CFs, and STS mitigated X-ray-induced injury. Enzyme-linked immuno-sorbent assay showed that X-rays increased the levels of secreted angiotensin II (Ang II) and brain natriuretic peptide (BNP). STS inhibited the X-ray-induced increases in Ang II and BNP release. Apoptosis and cell cycle of CFs were analyzed using flow cytometry. X-rays induced apoptosis in CFs, whereas STS inhibited apoptosis in CFs after X-ray irradiation. X-rays induced S-phase cell cycle arrest in CFs, which could be reversed by STS. X-rays increased the expression of phosphorylated-P38/P38, cleaved caspase-3 and caspase-3 as well as decreased the expression of phosphorylated extracellular signal-regulated kinase 1/2 (ERK 1/2)/ERK 1/2 and B cell lymphoma 2 (Bcl-2)/Bcl-2 associated X protein (BAX) in CFs, as shown by Western blotting. STS mitigated the X-ray radiation-induced expression changes of these proteins. In conclusion, our results demonstrated that STS may potentially be developed as a medical countermeasure to mitigate radiation-induced cardiac damage.


Asunto(s)
Fibroblastos/efectos de los fármacos , Fibroblastos/efectos de la radiación , Miocitos Cardíacos/efectos de los fármacos , Miocitos Cardíacos/efectos de la radiación , Fenantrenos/farmacología , Traumatismos por Radiación/prevención & control , Animales , Apoptosis/efectos de los fármacos , Células Cultivadas , Estrés Oxidativo/efectos de los fármacos , Ratas , Ratas Sprague-Dawley
18.
Gland Surg ; 8(4): 362-369, 2019 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-31538060

RESUMEN

BACKGROUND: High resolution ultrasonography (US) is the first choice for diagnosis of thyroid cancer and is based on many sonographic features: composition, echogenicity, margins, calcifications, shape and vascularity. Here, we tried to develop a nomogram to evaluate papillary thyroid carcinoma (PTC) based on sonographic features. METHODS: From Aug 2016 to Dec 2017, a primary cohort of 382 patients with suspicious thyroid nodules and accepted US examinations were included in Gansu Provincial Hospital. Sonographic features were used to develop a nomogram with Cox regression analysis. The nomogram was validated using prospective data from 162 patients as the validation group. RESULTS: The primary and validation cohort showed comparable clinical and US features in all aspects. Univariate and multivariate analyses showed solid composition [odds ratio (OR): 3.785; 95% confidence interval (CI): 1.504-9.528, P=0.005], hypoechoic (OR: 15.840; 95% CI: 5.754-43.602, P<0.001) and irregular margins (OR: 15.953; 95% CI: 5.897-43.160, P<0.001), microcalcifications (OR: 21.730; 95% CI: 7.119-66.329, P<0.001), taller than wide shape (OR: 5.153; 95% CI: 1.997-13.311, P=0.001), internal high vascularization (OR: 6.288; 95% CI: 2.175-18.181, P=0.001), and obscure borders (OR: 5.648; 95% CI: 2.118-15.065, P=0.001) as risk factors for PTC. Based on the seven risk factors, nomogram was developed and validated by a prospective group, and discrimination and calibration were measured using the concordance index (C-index). CONCLUSIONS: Our novel nomogram risk score model based on the US features accurately predicted PTC nodule diagnosis.

20.
Clin Pharmacol Drug Dev ; 7(8): 880-888, 2018 11.
Artículo en Inglés | MEDLINE | ID: mdl-29920978

RESUMEN

Vortioxetine is an antidepressant agent with multimodal activity that is approved for the treatment of major depressive disorder at doses of 5 to 20 mg once daily. Vortioxetine is a medium-clearance drug that undergoes extensive metabolism via several cytochrome P450 isozymes. A series of single- and multiple-dose pharmacokinetic studies were performed to evaluate the impact of intrinsic (ie, subject-related) factors, such as age, sex, race, and renal and hepatic function, on the pharmacokinetics of vortioxetine. The point estimates on the ratios and their 90% confidence intervals (CIs) for the central values of AUC (area under the concentration-time curve) and Cmax (maximum plasma concentration) were obtained by taking the antilog of the differences and 90%CIs in the log-transformed least-squares means. The results demonstrate that there were no clinically meaningful differences (defined as exposure difference between 50% and 2-fold change) in the exposure to vortioxetine (as assessed by AUC and Cmax ) between elderly and younger subjects, men and women, and blacks and whites and among subjects with varying degrees of renal or hepatic impairment. These results suggest that no dosing adjustments of vortioxetine are required for the intrinsic factors investigated in these studies.


Asunto(s)
Vortioxetina/farmacocinética , Adolescente , Adulto , Factores de Edad , Anciano , Anciano de 80 o más Años , Antidepresivos/sangre , Antidepresivos/farmacocinética , Relación Dosis-Respuesta a Droga , Etnicidad/estadística & datos numéricos , Femenino , Voluntarios Sanos , Insuficiencia Hepática/sangre , Humanos , Masculino , Persona de Mediana Edad , Insuficiencia Renal/sangre , Factores Sexuales , Método Simple Ciego , Vortioxetina/sangre , Adulto Joven
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