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1.
BMC Emerg Med ; 24(1): 93, 2024 May 31.
Artigo em Inglês | MEDLINE | ID: mdl-38816816

RESUMO

OBJECTIVE: Given the frequency of disasters worldwide, there is growing demand for efficient and effective emergency responses. One challenge is to design suitable retrospective charts to enable knowledge to be gained from disasters. This study provides comprehensive understanding of published retrospective chart review templates for designing and updating retrospective research. METHODS: We conducted a systematic review and text analysis of peer-reviewed articles and grey literature on retrospective chart review templates for reporting, analysing, and evaluating emergency responses. The search was performed on PubMed, Cochrane, and Web of Science and pre-identified government and non-government organizational and professional association websites to find papers published before July 1, 2022. Items and categories were grouped and organised using visual text analysis. The study is registered in PROSPERO (374,928). RESULTS: Four index groups, 12 guidelines, and 14 report formats (or data collection templates) from 21 peer-reviewed articles and 9 grey literature papers were eligible. Retrospective tools were generally designed based on group consensus. One guideline and one report format were designed for the entire health system, 23 studies focused on emergency systems, while the others focused on hospitals. Five papers focused specific incident types, including chemical, biological, radiological, nuclear, mass burning, and mass paediatric casualties. Ten papers stated the location where the tools were used. The text analysis included 123 categories and 1210 specific items; large heterogeneity was observed. CONCLUSION: Existing retrospective chart review templates for emergency response are heterogeneous, varying in type, hierarchy, and theoretical basis. The design of comprehensive, standard, and practicable retrospective charts requires an emergency response paradigm, baseline for outcomes, robust information acquisition, and among-region cooperation.


Assuntos
Planejamento em Desastres , Humanos , Estudos Retrospectivos , Planejamento em Desastres/organização & administração , Desastres
2.
Int Wound J ; 21(4): e14562, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38130102

RESUMO

Burn injuries result in localised tissue damage and precipitate systemic responses; routine clinical treatments, which typically include metabolic nutritional support and anti-infection therapies, do not yield optimal outcomes. Therefore, we aimed to systematically evaluate the effects of ulinastatin on wound infection and healing in patients with burns to provide reliable evidence-based recommendations for burn treatment. An electronic search of the Web of Science, PubMed, Cochrane Library, Embase, Wanfang, Chinese Biomedical Literature Database, and China National Knowledge Infrastructure databases, supplemented by manual searches, was conducted from database inception to October 2023 to collect randomised controlled trials (RCTs) assessing the efficacy of ulinastatin for the treatment of burns. Two researchers screened all retrieved articles according to the inclusion and exclusion criteria; the included studies were evaluated for quality, and the relevant data were extracted. Stata 17.0 software was employed for data analysis. Overall, 8 RCTs with 803 patients were included, with 404 and 399 in the ulinastatin and conventional treatment groups, respectively. The analysis revealed that wound infections (odds ratio [OR] = 0.08, 95% CI: 0.02-0.35, p = 0.001) and complications (OR = 0.21, 95% CI: 0.10-0.42, p < 0.001) were significantly lower, and wound healing time (standardised mean differences [SMD] = -1.31, 95% CI: -2.05 to -0.57, p = 0.001) was significantly shorter, in the ulinastatin groups than in the control group. This meta-analysis revealed that ulinastatin can effectively reduce the incidence of wound infections and complications and significantly shorten the duration of wound healing in patients with burns, thereby promoting early recovery in these patients.


Assuntos
Queimaduras , Glicoproteínas , Infecção dos Ferimentos , Humanos , Infecção dos Ferimentos/tratamento farmacológico , Cicatrização , Queimaduras/complicações , Queimaduras/tratamento farmacológico , China
3.
J Org Chem ; 88(6): 3871-3882, 2023 Mar 17.
Artigo em Inglês | MEDLINE | ID: mdl-36864592

RESUMO

A palladium-catalyzed highly regioselective C-H allylation/annulation reaction of N-sulfonyl amides with secondary or tertiary allylic alcohols has been developed to construct 3,4-dihydroisoquinolones bearing a synthetically valuable vinyl substituent. This cascade cyclization approach of allylic alcohols involving C-H allylation has not been reported previously. The commercially available allylic alcohol substrates, the only by-product of water, and the used terminal oxidant of O2 provide environmentally benign advantages.

4.
J Org Chem ; 88(7): 4790-4798, 2023 Apr 07.
Artigo em Inglês | MEDLINE | ID: mdl-36989386

RESUMO

A hexafluoroisopropanol (HFIP)-promoted hydroxydifluoromethylation of aniline, indole, and pyrrole derivatives with difluoroacetaldehyde ethyl hemiacetal has been developed. This protocol provides a facile and straightforward approach to access diverse difluoromethylated carbinols in good to excellent yields under mild conditions. Furthermore, gram-scale and synthetic derivatization experiments have also been demonstrated.

5.
Environ Sci Technol ; 57(6): 2527-2537, 2023 02 14.
Artigo em Inglês | MEDLINE | ID: mdl-36725089

RESUMO

Manganese ion [Mn(II)] is a background constituent existing in natural waters. Herein, it was found that only 59% of bisphenol A (BPA), 47% of bisphenol F (BPF), 65% of acetaminophen (AAP), and 49% of 4-tert-butylphenol (4-tBP) were oxidized by 20 µM of Fe(VI), while 97% of BPA, 95% of BPF, 96% of AAP, and 94% of 4-tBP could be oxidized by the Fe(VI)/Mn(II) system [20 µM Fe(VI)/20 µM Mn(II)] at pH 7.0. Further investigations showed that bisphenol S (BPS) was highly reactive with reactive iron species (RFeS) but was sluggish with reactive manganese species (RMnS). By using BPS and methyl phenyl sulfoxide (PMSO) as the probe compounds, it was found that reactive iron species contributed primarily for BPA oxidation at low Mn(II)/Fe(VI) molar ratios (below 0.1), while reactive manganese species [Mn(VII)/Mn(III)] contributed increasingly for BPA oxidation with the elevation of the Mn(II)/Fe(VI) molar ratio (from 0.1 to 3.0). In the interaction of Mn(II) and Fe(VI), the transfer of oxidation capacity from Fe(VI) to Mn(III), including the formation of Mn(VII) and the inhibition of Fe(VI) self-decay, improved the amount of electron equivalents per Fe(VI) for BPA oxidation. UV-vis spectra and dominant transformation product analysis further revealed the evolution of iron and manganese species at different Mn(II)/Fe(VI) molar ratios.


Assuntos
Manganês , Poluentes Químicos da Água , Manganês/química , Ferro/química , Oxirredução , Poluentes Químicos da Água/química
6.
Int Psychogeriatr ; : 1-12, 2023 Feb 21.
Artigo em Inglês | MEDLINE | ID: mdl-36805733

RESUMO

OBJECTIVES: The aim of this study was to investigate the factors influencing urban-rural differences in depressive symptoms among old people in China and to measure the contribution of relevant influencing factors. DESIGN: A cross-sectional research. The 2018 data from The Chinese Longitudinal Health Longevity Survey (CLHLS). SETTING: Twenty-three provinces in China. PARTICIPANTS: From the 8th CLHLS, 11,245 elderly participants were selected who met the requirements of the study. MEASUREMENTS: We established binary logistic regression models to explore the main influencing factors of their depressive symptoms and used Fairlie models to analyze the influencing factors of the differences in depressive symptoms between the urban and rural elderly and their contribution. RESULTS: The percentage of depressive symptoms among Chinese older adults was 11.72%, and the results showed that rural older adults (12.41%) had higher rates of depressive symptoms than urban (10.13%). The Fairlie decomposition analysis revealed that 73.96% of the difference in depressive symptoms could be explained, which was primarily associated with differences in annual income (31.51%), education level (28.05%), sleep time ( - 25.67%), self-reported health (24.18%), instrumental activities of daily living dysfunction (20.73%), exercise (17.72%), living status ( - 8.31%), age ( - 3.84%), activities of daily living dysfunction ( - 3.29%), and social activity (2.44%). CONCLUSIONS: The prevalence of depressive symptoms was higher in rural than in urban older adults, which was primarily associated with differences in socioeconomic status, personal lifestyle, and health status factors between the urban and rural residents. If these factors were addressed, we could make targeted and precise intervention strategies to improve the mental health of high-risk elderly.

7.
BMC Public Health ; 23(1): 2045, 2023 10 19.
Artigo em Inglês | MEDLINE | ID: mdl-37858126

RESUMO

BACKGROUND: This study aimed to examine the factors influencing self-rated health (SRH) among Chinese older adults by gender differences and provide suggestions and theoretical references to help make policies for older adults' health concerns by government agencies. METHODS: Chinese Longitudinal Health Longevity Survey (CLHLS) in 2018 was adopted, the chi-squared test and the logistic regression analysis were performed to analyse self-rated health reported by Chinese female and male older adults and its influencing factors. In addition, Fairlie decomposition analysis was performed to quantify the contribution level of different influencing factors. RESULTS: Among older adults, males (48.0%) reported a significantly higher level of good self-rated health than females (42.3%). Residence, body mass index (BMI), self-reported income, smoking, drinking, exercise, and social activity were the factors that influenced SRH reported by male and female respondents, with age, marital status and education reaching the significance level only in women. The Fairlie decomposition model can explain the underlying reasons for 86.7% of the gender differences in SRH, with self-reported income (15.3%), smoking (32.7%), drinking (42.5%), exercise (17.4%), social activity (15.1%) and education (-14.6%) being the major factors affecting gender differences in SRH. CONCLUSIONS: The study results can help promote the implementation of the Healthy China Initiative, inform intervention measures, and offer new proposals on creating policies for older adults' health issues by the Chinese government to improve health equity.


Assuntos
Nível de Saúde , Renda , Humanos , Masculino , Feminino , Idoso , Estudos Transversais , Desigualdades de Saúde , Inquéritos Epidemiológicos , China/epidemiologia
8.
Zhongguo Dang Dai Er Ke Za Zhi ; 25(7): 739-744, 2023 Jul 15.
Artigo em Chinês | MEDLINE | ID: mdl-37529957

RESUMO

OBJECTIVES: To explore the relationship between atherogenic index of plasma (AIP) and childhood asthma. METHODS: This retrospective study included 86 children with asthma admitted to the Changzhou Second People's Hospital Affiliated to Nanjing Medical University from July 2020 to August 2022 as the asthma group and 149 healthy children undergoing physical examination during the same period as the control group. Metabolic parameters including total cholesterol, triglycerides, high-density lipoprotein cholesterol, low-density lipoprotein cholesterol, and blood glucose, as well as general information of the children such as height, weight, body mass index, presence of specific dermatitis, history of inhalant allergen hypersensitivity, family history of asthma, and feeding history, were collected. Multivariable logistic regression analysis was used to study the relationship between AIP, triglycerides, and high-density lipoprotein cholesterol and asthma. The value of AIP, triglycerides, and high-density lipoprotein cholesterol for predicting asthma was assessed using receiver operating characteristic (ROC) curve analysis. RESULTS: The AIP and triglyceride levels in the asthma group were significantly higher than those in the control group, while high-density lipoprotein cholesterol was significantly lower (P<0.05). However, there was no significant difference in total cholesterol and low-density lipoprotein cholesterol between the two groups (P>0.05). Before and after adjusting for height, weight, presence of specific dermatitis, history of inhalant allergen hypersensitivity, family history of asthma, feeding method, and blood glucose, multivariable logistic regression analysis showed that AIP, triglycerides, and high-density lipoprotein cholesterol were associated with asthma (P<0.05). ROC curve analysis showed that the optimal cutoff value for predicting asthma with AIP was -0.333, with a sensitivity of 80.2%, specificity of 55.0%, positive predictive value of 50.71%, and negative predictive value of 82.85%. The area under the curve (AUC) for AIP in predicting asthma was significantly higher than that for triglycerides (P=0.009), but there was no significant difference in AUC between AIP and high-density lipoprotein cholesterol (P=0.686). CONCLUSIONS: AIP, triglycerides, and high-density lipoprotein cholesterol are all associated with asthma. AIP has a higher value for predicting asthma than triglycerides and comparable value to high-density lipoprotein cholesterol.


Assuntos
Asma , Dermatite , Humanos , Criança , Estudos Retrospectivos , Glicemia , Triglicerídeos , HDL-Colesterol , LDL-Colesterol , Asma/etiologia , Fatores de Risco
9.
Mol Psychiatry ; 26(5): 1472-1490, 2021 05.
Artigo em Inglês | MEDLINE | ID: mdl-32332993

RESUMO

The formation and maintenance of synapses require long-distance delivery of newly synthesized synaptic proteins from the soma to distal synapses, raising the fundamental question of whether impaired transport is associated with neurodevelopmental disorders such as autism. We previously revealed that syntabulin acts as a motor adapter linking kinesin-1 motor and presynaptic cargos. Here, we report that defects in syntabulin-mediated transport and thus reduced formation and maturation of synapses are one of core synaptic mechanisms underlying autism-like synaptic dysfunction and social behavioral abnormalities. Syntabulin expression in the mouse brain peaks during the first 2 weeks of postnatal development and progressively declines during brain maturation. Neurons from conditional syntabulin-/- mice (stb cKO) display impaired transport of presynaptic cargos, reduced synapse density and active zones, and altered synaptic transmission and long-term plasticity. Intriguingly, stb cKO mice exhibit core autism-like traits, including defective social recognition and communication, increased stereotypic behavior, and impaired spatial learning and memory. These phenotypes establish a new mechanistic link between reduced transport of synaptic cargos and impaired maintenance of synaptic transmission and plasticity, contributing to autism-associated behavioral abnormalities. This notion is further confirmed by the human missense variant STB-R178Q, which is found in an autism patient and loses its adapter capacity for binding kinesin-1 motors. Expressing STB-R178Q fails to rescue reduced synapse formation and impaired synaptic transmission and plasticity in stb cKO neurons. Altogether, our study suggests that defects in syntabulin-mediated transport mechanisms underlie the synaptic dysfunction and behavioral abnormalities that bear similarities to autism.


Assuntos
Transtorno Autístico , Animais , Transtorno Autístico/genética , Células Cultivadas , Humanos , Camundongos , Neurônios , Sinapses , Transmissão Sináptica
10.
J Org Chem ; 87(9): 6352-6361, 2022 May 06.
Artigo em Inglês | MEDLINE | ID: mdl-35466680

RESUMO

A HFIP-promoted highly selective hydroxyalkylation of aniline derivatives with arylglyoxal hydrates has been realized. The reaction produces various N,N-dialkylanilines and their derivatives with α-hydroxy carbonyl units in good to excellent yields under mild conditions. Furthermore, the synthetic potential of this method has been demonstrated by the facile synthesis of several structurally interesting molecules such as benzil, 1,2,4-triazine, quinoxaline, hydantoin, and 2-thiohydantoin with aromatic amine units.

11.
Med Sci Monit ; 27: e935562, 2021 11 24.
Artigo em Inglês | MEDLINE | ID: mdl-34815377

RESUMO

On Authors request due to not being able to reproduce the experiment. Reference: Yichen Fang, Jie Li, Yinan Wu, Jing Gui, Yang Shen. Costunolide Inhibits the Growth of OAW42-A Multidrug-Resistant Human Ovarian Cancer Cells by Activating Apoptotic and Autophagic Pathways, Production of Reactive Oxygen Species (ROS), Cleaved Caspase-3 and Cleaved Caspase-9. Med Sci Monit, 2019; 25: 3231-3237. DOI: 10.12659/MSM.914029.

12.
J Cell Biochem ; 121(2): 1890-1900, 2020 02.
Artigo em Inglês | MEDLINE | ID: mdl-31709621

RESUMO

Preterm birth (PTB) is a major cause of neonatal mortality, with a poorly understood etiology. The regular contraction of the myometrium was considered as contributing to the etiology of the onset of labor, especially PTB. Thus, studying the mechanism of myometrium contraction is very important for understanding the initiation of labor and also for preventing PTB. Using liquid chromatography-mass spectrometry, we found 322 significantly differential peptides in myometrium tissues between term nonlabor and term labor groups (absolute fold change ≥ 2 and P < .05). We next analyzed length, molecular weights, isoelectric point, and cleavage site of all the different peptides. We, next, analyzed the functions of different peptides through their precursor proteins by Gene Ontology, enrichment and canonical pathway analysis. The results indicated that the extracellular matrix (ECM) played a major role in biological process, the cellular component, and molecular function categories, and revealed that ECM remodeling played a vital role in myometrial contraction. In addition, some known signaling, such as corticotropin-releasing hormone signaling and calcium signaling were proven to be involved in this process. Ingenuity Pathways Analysis upstream regulator analysis suggested that some of the known molecules, which reportedly were very important in labor onset, were included, for example, nuclear factor κB, tubulin, and phosphoinositide 3-kinase. We also identified 23 peptides derived from the precursor protein TITIN, of which 21 peptides sequences from TITIN were located in functional domains. These results suggested that peptides play an important role in labor onset and provide further insight into PTB therapy.


Assuntos
Trabalho de Parto/metabolismo , Miométrio/metabolismo , Fragmentos de Peptídeos/análise , Fragmentos de Peptídeos/metabolismo , Nascimento Prematuro/metabolismo , Adulto , Feminino , Humanos , Gravidez , Proteômica
13.
Med Sci Monit ; 25: 3231-3237, 2019 05 02.
Artigo em Inglês | MEDLINE | ID: mdl-31043579

RESUMO

BACKGROUND Worldwide, ovarian cancer has a high mortality rate due to the difficulty in diagnosing early-stage disease and resistance to chemotherapy agents. Costunolide is a plant-derived sesquiterpene lactone with anti-oxidant properties. This study aimed to investigate the effects of costunolide on cell growth, apoptosis, autophagy, the production of reactive oxygen species (ROS), cleaved caspase-3, and cleaved caspase-9 on the multidrug-resistant ovarian cancer cell line, OAW42-A. MATERIAL AND METHODS The MTT assay determined the proliferation rate of OAW42-A multidrug-resistant ovarian cancer cells and the apoptosis rate was determined using propidium iodide (PI) staining. Autophagy was detected by measuring the expression of LC3 II. Fluorescence flow cytometry was used to measure the levels of reactive oxygen species (ROS) and the mitochondrial membrane potential. Protein expression of LC3 II, beclin 1, cleaved caspase-3, and cleaved caspase-9 were measured by Western blot. RESULTS Costunolide treatment inhibited the growth of OAW42-A cells with an IC50 of 25 µM, resulted in apoptotic cell death, increased the expression of Bax, and decreased the expression of Bcl-2. Confocal electron microscopy showed that costunolide induced autophagy in the OAW42-A cells. Western blot showed that costunolide treatment of OAW42-A cells increased the expression of the LC3 II, beclin 1, cleaved caspase-3, and cleaved caspase-9. Costunolide treatment significantly increased the levels of ROS and reduced the OAW42-A cell mitochondrial membrane potential. CONCLUSIONS Costunolide inhibited growth, apoptosis, ROS generation, and was associated with loss of mitochondrial membrane potential of OAW42-A multidrug-resistant ovarian cancer cells.


Assuntos
Caspase 3/metabolismo , Caspase 9/metabolismo , Neoplasias Ovarianas/tratamento farmacológico , Espécies Reativas de Oxigênio/metabolismo , Sesquiterpenos/farmacologia , Antineoplásicos Fitogênicos/farmacologia , Apoptose/efeitos dos fármacos , Autofagia/efeitos dos fármacos , Pontos de Checagem do Ciclo Celular/efeitos dos fármacos , Linhagem Celular Tumoral , Movimento Celular/efeitos dos fármacos , Proliferação de Células/efeitos dos fármacos , Resistencia a Medicamentos Antineoplásicos , Feminino , Humanos , Potencial da Membrana Mitocondrial/efeitos dos fármacos , Mitocôndrias/efeitos dos fármacos , Mitocôndrias/metabolismo , Metástase Neoplásica , Neoplasias Ovarianas/genética , Neoplasias Ovarianas/metabolismo , Neoplasias Ovarianas/patologia
14.
J Nanosci Nanotechnol ; 18(3): 2072-2074, 2018 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-29448715

RESUMO

ZnO nanostructures were directly grown on a-GaN/r-sapphire with different growth time via aqueous method. Structural and optical properties of the nanostructures were investigated by using a variety of techniques including X-ray diffraction (XRD), scan electron microscope (SEM), room-temperature photoluminescence (PL), and Raman scattering. The results showed the growth mechanism of ZnO nanostructures grown on a-GaN is Volmer-Weber (VW) mode, which is due to the high interfacial free-energy between a-plane ZnO and GaN. Meanwhile, compressive strains were revealed to exist by the optical characterizations. And the strengths were found to reduce with increasing growth time.

16.
Tumour Biol ; 39(5): 1010428317701632, 2017 May.
Artigo em Inglês | MEDLINE | ID: mdl-28466784

RESUMO

Long non-coding RNAs have recently emerged as important regulators in the pathogenesis and progression of cancers. The long non-coding RNA urothelial carcinoma-associated 1 is reportedly upregulated and functions as an oncogene in some tumors. However, the role of urothelial carcinoma-associated 1 in renal cell carcinoma is not well elucidated so far. In this study, we found that urothelial carcinoma-associated 1 was overexpressed in renal cell carcinoma tissues compared with the adjacent normal tissues, and higher urothelial carcinoma-associated 1 expression levels were positively associated with advanced tumor stage and poor survival time in renal cell carcinoma patients. Further studies showed that knockdown of urothelial carcinoma-associated 1 suppressed renal cell carcinoma cell proliferation and S-phase cell number in vitro. Moreover, urothelial carcinoma-associated 1 was found to be associated with enhancer of zeste homolog 2, which suppressed p21 expression through histone methylation (H3K27me3) on p21 promoter. We also showed that knockdown of urothelial carcinoma-associated 1 increased the p21 protein expression through regulating enhancer of zeste homolog 2. In addition, bioinformatics analysis and dual-luciferase reporter assays confirmed that miR-495 was a target of urothelial carcinoma-associated 1 in renal cell carcinoma, and urothelial carcinoma-associated 1 promoted cell proliferation by negatively regulating miR-495. These findings illuminated that urothelial carcinoma-associated 1 promoted renal cell carcinoma progression through enhancer of zeste homolog 2 and interacted with miR-495. Overall, overexpression of urothelial carcinoma-associated 1 functions as an oncogene in renal cell carcinoma that may offer a novel therapeutic target for renal cell carcinoma patients.


Assuntos
Carcinoma de Células Renais/genética , Proteína Potenciadora do Homólogo 2 de Zeste/genética , MicroRNAs/biossíntese , RNA Longo não Codificante/genética , Adulto , Idoso , Apoptose/genética , Carcinoma de Células Renais/patologia , Linhagem Celular Tumoral , Proliferação de Células , Metilação de DNA/genética , Epigênese Genética/genética , Feminino , Regulação Neoplásica da Expressão Gênica , Humanos , Masculino , MicroRNAs/genética , Pessoa de Meia-Idade , Regiões Promotoras Genéticas
17.
J Nanosci Nanotechnol ; 17(2): 1476-479, 2017 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-29688652

RESUMO

A new strategy has been successfully designed for the first time to synthesize indium hydroxide (In(OH)3) nanocube film by employing a novel hydroxyl (OH−) solution corrosion-base approach. The structure and optical properties of the In(OH)3 structures were investigated. It showed that In(OH)3 cube film structure was formed. Meanwhile, the In(OH)3 obtained exhibits a strong blue PL emission which allows it to be considered as a promising material for electronic and optical properties. The results show that this preparation strategy of In(OH)3 nanocube film is proved to be a simple and effective synthesis method.

18.
Angew Chem Int Ed Engl ; 54(12): 3683-7, 2015 Mar 16.
Artigo em Inglês | MEDLINE | ID: mdl-25655404

RESUMO

Phosphine-initiated cation exchange is a well-known inorganic chemistry reaction. In this work, different phosphines have been used to modulate the thermodynamic and kinetic parameters of the cation exchange reaction to synthesize complex semiconductor nanostructures. Besides preserving the original shape and size, phosphine-initiated cation exchange reactions show potential to precisely tune the crystallinity and composition of metal/semiconductor core-shell and doped nanocrystals. Furthermore, systematic studies on different phosphines and on the elementary reaction mechanisms have been performed.

19.
J Biol Chem ; 288(49): 35500-10, 2013 Dec 06.
Artigo em Inglês | MEDLINE | ID: mdl-24165128

RESUMO

Lithium is an effective mood stabilizer that has been clinically used to treat bipolar disorder for several decades. Recent studies have suggested that lithium possesses robust neuroprotective and anti-tumor properties. Thus far, a large number of lithium targets have been discovered. Here, we report for the first time that HDAC1 is a target of lithium. Lithium significantly down-regulated HDAC1 at the translational level by targeting HDAC1 mRNA. We also showed that depletion of HDAC1 is essential for the neuroprotective effects of lithium and for the lithium-mediated degradation of mutant huntingtin through the autophagic pathway. Our studies explain the multiple functions of lithium and reveal a novel mechanism for the function of lithium in neurodegeneration.


Assuntos
Histona Desacetilase 1/antagonistas & inibidores , Histona Desacetilase 1/genética , Lítio/farmacologia , Proteínas Mutantes/genética , Proteínas Mutantes/metabolismo , Proteínas do Tecido Nervoso/genética , Proteínas do Tecido Nervoso/metabolismo , Autofagia , Proteínas CELF1 , Regulação para Baixo/efeitos dos fármacos , Quinase 3 da Glicogênio Sintase/metabolismo , Glicogênio Sintase Quinase 3 beta , Células HEK293 , Células HeLa , Histona Desacetilase 1/metabolismo , Inibidores de Histona Desacetilases/farmacologia , Humanos , Proteína Huntingtina , Fármacos Neuroprotetores/farmacologia , Proteólise/efeitos dos fármacos , RNA Mensageiro/genética , RNA Mensageiro/metabolismo , Proteínas de Ligação a RNA/metabolismo
20.
Zhonghua Jie He He Hu Xi Za Zhi ; 37(7): 512-6, 2014 Jul.
Artigo em Chinês | MEDLINE | ID: mdl-25262692

RESUMO

OBJECTIVE: To identify the subspecies of Mycobacterium abscessus (M.abscessus) group. METHODS: The corresponding genes (hsp65 and rpoB) in 19 clinical isolates (CIs) of M.abscessus group susceptible to clarithromycin were amplified by PCR. Phylogenetic analyses and subspecies identification of the hsp65 gene and rpoB gene were conducted separately and jointly by using the Mega program and PhyML program, and the conflicting species were further identified by the internally transcribed spacer (ITS) sequencing. The rrl and erm(41) of M.abscessus group detection were performed by PCR sequencing, and MICs of inducible resistance to clarithromycin were determined by the broth microdilution method, and then the phenotypic patterns of 19 isolates were analyzed. RESULTS: Comparisons between hsp65 and rpoB sequences of the 19 clinical isolates led to the identification of 10 CIs as Mycobacterium (M). massiliense, 4 CIs as Mycobacterium (M). abscessus, and 1 CI as Mycobacterium (M). bolletii, while the other 4 isolates were identified as M. massiliense by hsp65 gene sequencing and as M.abscessus by rpoB gene sequencing. Ultimately the 4 conflicting isolates were identified as M. massiliense by ITS sequencing. No mutations in the rrl gene with clarithromycin resistance were found. The -35 sequence of the erm (41) promoter of M.abscessus was different from that of M. bolletii and M. massiliense, and the nucleotide at position 28 was polymorphic (T28 or C28); -35 sequence and the nucleotide at position 28 were the same in erm (41) for M. bolletii and M. massiliense. Fourteen M. massiliense strains shared 100% (14/14) homology for erm (41) with 276 bp deletions and 2 bp deletions, and no deletions were found in 4 CIs as M.abscessus and 1 CIs as M. bolletii. The clarithromycin inducible resistance test showed that 3 M.abscessus with T28 (CI02, CI04, CI12) and 1 M. bolletii (CI18) strains were highly resistant, and the other 14 M. massiliense and 1 M.abscessus with polymorphic C28 (CI17) strains remained susceptible. No correlations between -35 sequence of erm (41) promoter and clarithromycin inducible resistance were found. CONCLUSIONS: Hsp65 is applicable to the identification of the subspecies of M.abscessus group, and due to the fact that subspecies of M.abscessus group shows distinct genotytpcally feature in erm (41) sequencing and phenotypic feature in clarithromycin susceptibility, hsp65 and erm (41) can be applied to the identification of subspecies of M.abscessus group, and the resulting data may be useful for clinical diagnosis and treatments.


Assuntos
Mycobacterium/classificação , Fenótipo , Antibacterianos/farmacologia , Proteínas de Bactérias , Claritromicina/farmacologia , DNA Bacteriano , Humanos , Testes de Sensibilidade Microbiana , Mycobacterium/genética , Mycobacterium/isolamento & purificação , Micobactérias não Tuberculosas , Filogenia , Reação em Cadeia da Polimerase , Análise de Sequência de DNA
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