Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 65
Filtrar
Mais filtros

Base de dados
País/Região como assunto
Tipo de documento
Intervalo de ano de publicação
1.
Br J Nutr ; 130(6): 958-965, 2023 09 28.
Artigo em Inglês | MEDLINE | ID: mdl-36744324

RESUMO

Overall diet quality during pregnancy has played an important role on maternal glucose metabolism. However, evidence based on the adherence to the dietary guideline is limited, especially for Asian populations. We aimed to examine the association between adherence to the Chinese dietary guideline measured by the Diet Balance Index for Pregnancy (DBI-P) and maternal glucose metabolism, including gestational diabetes mellitus (GDM) status, fasting and 2-h plasma glucose. Data were obtained from the baseline survey of the Yuexiu birth cohort. We recruited 942 pregnant women at 20-28 weeks of gestation in 2017-2018. Dietary intakes during the past month were collected using a validated semi-quantitative FFQ. The scores of DBI-P were calculated to assess dietary quality. Lower absolute values of the scores indicate higher adherence to the Chinese dietary guidelines. All participants underwent a 75 g of oral glucose tolerance test (OGTT). Multiple linear regression and logistic regression were conducted. The Benjamini-Hochberg method was used to adjust multiple comparisons across DBI-P food components. The value of high bound score indicator, reflecting excessive total food intake, was positively associated with OGTT-2h glucose levels (ß = 0·037, P = 0·029). After adjustment for multiple comparisons, the score of animal food intake was positively associated with OGTT-2 h glucose levels (ß = 0·045, P = 0·045) and risk of GDM (OR = 1·105, P = 0·030). In conclusion, excessive total food intake was associated with higher postprandial glucose in pregnant women. Lower compliance with the dietary guideline for animal food was associated with both higher postprandial glucose and increased risk of GDM during pregnancy.


Assuntos
Diabetes Gestacional , Dieta , População do Leste Asiático , Feminino , Humanos , Gravidez , Glicemia/metabolismo , Dieta/efeitos adversos , Teste de Tolerância a Glucose , Fatores de Risco
2.
BMC Urol ; 22(1): 154, 2022 Sep 19.
Artigo em Inglês | MEDLINE | ID: mdl-36123660

RESUMO

BACKGROUND: Emphysematous pyelonephritis (EPN) is a potentially life-threatening disease caused by a gas-producing necrotizing bacterial infection that involves the renal parenchyma, collecting system, and/or perinephric tissue. EPN is often complicated by a previous diagnosis of diabetes mellitus, and venous air bubbles are an uncommon complication of it. We describe a 52-year-old woman who was admitted in coma, with a history of vomiting, and was found to have EPN with air bubbles in the uterine veins. We discuss the presentation, diagnosis, and pathogenesis of this uncommon but clinically significant event, and briefly review other case reports of venous gas or thrombosis caused by EPN. CASE PRESENTATION: We report the case of a 52-year-old woman with past history of type 2 diabetes mellitus, presenting with loss of consciousness after vomiting for half a day. Abdominal computed tomography scan revealed unilateral EPN with air bubbles in the uterine veins. The blood, pus, and urine cultures were positive for extended-spectrum beta-lactamase-producing Escherichia coli. The patient's condition improved well after conservative management comprising supportive measures, broad-spectrum antibiotics, percutaneous drainage therapy, and an open operation. CONCLUSIONS: Venous air bubbles are rare but fatal complication of EPN. Early diagnosis and treatment are critical to ensure good results.


Assuntos
Complicações do Diabetes , Diabetes Mellitus Tipo 2 , Enfisema , Pielonefrite , Antibacterianos/uso terapêutico , Complicações do Diabetes/complicações , Diabetes Mellitus Tipo 2/complicações , Enfisema/diagnóstico por imagem , Enfisema/etiologia , Enfisema/terapia , Escherichia coli , Feminino , Humanos , Pessoa de Meia-Idade , Pielonefrite/complicações , Pielonefrite/diagnóstico por imagem , Vômito/complicações , Vômito/tratamento farmacológico , beta-Lactamases
3.
BMC Urol ; 21(1): 107, 2021 Aug 13.
Artigo em Inglês | MEDLINE | ID: mdl-34388999

RESUMO

BACKGROUND: To explore the risk factors for severe bleeding complications after percutaneous nephrolithotomy (PCNL) according to the modified Clavien scoring system. METHODS: We retrospectively analysed 2981 patients who received percutaneous nephrolithotomies from January 2014 to December 2020. Study inclusion criteria were PCNL and postoperative mild or severe renal haemorrhage in accordance with the modified Clavien scoring system. Mild bleeding complications included Clavien 2, while severe bleeding complications were greater than Clavien 3a. It has a good prognosis and is more likely to be underestimated and ignored in retrospective studies in bleeding complications classified by Clavien 1, so no analysis about these was conducted in this study. Clinical features, medical comorbidities and perioperative characteristics were analysed. Chi-square, independent t tests, Pearson's correlation, Fisher exact tests, Mann-Whitney and multivariate logistic regression were used as appropriate. RESULTS: Of the 2981 patients 70 (2.3%), met study inclusion criteria, consisting of 51 men and 19 women, 48 patients had severe bleeding complications. The remaining 22 patients had mild bleeding. Patients with postoperative severe bleeding complications were more likely to have no or slight degree of hydronephrosis and have no staghorn calculi on univariate analysis (p < 0.05). Staghorn calculi (OR, 95% CI, p value 0.218, 0.068-0.700, 0.010) and hydronephrosis (OR, 95% CI, p value 0.271, 0.083-0.887, 0.031) were independent predictors for severe bleeding via multivariate logistic regression analysis. Other factors, such as history of PCNL, multiple kidney stones, site of puncture calyx and mean corrected intraoperative haemoglobin drop were not related to postoperative severe bleedings. CONCLUSIONS: The absence of staghorn calculi and a no or mild hydronephrosis were related to an increased risk of post-percutaneous nephrolithotomy severe bleeding complications.


Assuntos
Hidronefrose/complicações , Cálculos Renais/cirurgia , Nefrolitotomia Percutânea/efeitos adversos , Hemorragia Pós-Operatória/etiologia , Cálculos Coraliformes , Idoso , Feminino , Humanos , Cálculos Renais/complicações , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Fatores de Risco
4.
J Biol Chem ; 293(44): 17154-17165, 2018 11 02.
Artigo em Inglês | MEDLINE | ID: mdl-30228180

RESUMO

Long noncoding RNAs (lncRNAs) are vital players in cancers, including hepatocellular carcinoma (HCC). We previously identified an lncRNA, GAS8-AS1, that is located in intron 2 of GAS8 However, its involvement in HCC is still largely unknown. In this study, we report that both GAS8-AS1 and its host gene GAS8 act as HCC tumor suppressors. We found that expression of GAS8-AS1 or GAS8 is significantly decreased in HCC tissues and is associated with a poor prognosis among HCC patients. Interestingly, lncRNA GAS8-AS1 could promote GAS8 transcription. We detected a CpG island in the GAS8 promoter, but lncRNA GAS8-AS1 did not affect DNA methylation at this GAS8 promoter site. Moreover, we identified two GAS8-AS1-interacting proteins, mixed-lineage leukemia 1 (MLL1), a histone 3 Lys-4 (H3K4) methyltransferase, and its partner WD-40 repeat protein 5 (WDR5). RNA pulldown, ChIP, and RNA immunoprecipitation assays revealed that GAS8-AS1 is required for maintaining the GAS8 promoter in an open chromatin state by recruiting the MLL1/WDR5 complex and for enhancing RNA polymerase II activity and GAS8 transcription. Of note, GAS8-AS1-dependent GAS8 hyperactivation inhibited malignant transformation of hepatocytes. Our results provide important insights into how lncRNA GAS8-AS1 suppresses HCC development and suggest potential strategies for treating patients with liver cancer.


Assuntos
Carcinoma Hepatocelular/genética , Proteínas do Citoesqueleto/genética , Neoplasias Hepáticas/genética , Proteínas de Neoplasias/genética , RNA Longo não Codificante/genética , Animais , Carcinogênese , Carcinoma Hepatocelular/metabolismo , Linhagem Celular Tumoral , Transformação Celular Neoplásica , Ilhas de CpG , Proteínas do Citoesqueleto/metabolismo , Metilação de DNA , Epigênese Genética , Regulação Neoplásica da Expressão Gênica , Humanos , Neoplasias Hepáticas/metabolismo , Masculino , Camundongos , Camundongos Endogâmicos BALB C , Camundongos Nus , Proteínas de Neoplasias/metabolismo , Regiões Promotoras Genéticas , RNA Longo não Codificante/metabolismo
5.
Am J Hum Genet ; 99(2): 275-86, 2016 08 04.
Artigo em Inglês | MEDLINE | ID: mdl-27453575

RESUMO

Genome-wide association studies (GWASs) have provided many insights into cancer genetics. However, the molecular mechanisms of many susceptibility SNPs defined by GWASs in cancer heritability and in promoting cancer risk remain elusive. New research strategies, including functional evaluations, are warranted to systematically explore truly causal genetic variants. In this study, we developed an integrative functional genomics methodology to identify cancer susceptibility SNPs in transcription factor-binding sites across the whole genome. Employing integration of functional genomic data from c-Myc cistromics, 1000 Genomes, and the TRANSFAC matrix, we successfully annotated 12 SNPs present in the c-Myc cistrome with properties consistent with modulating c-Myc binding affinity in hepatocellular carcinoma (HCC). After genotyping these 12 SNPs in 1,806 HBV-related HCC case subjects and 1,708 control subjects, we identified a HCC susceptibility SNP, rs157224G>T, in Chinese populations (T allele: odds ratio = 1.64, 95% confidence interval = 1.32-2.02; p = 5.2 × 10(-6)). This polymorphism leads to HCC predisposition through modifying c-Myc-mediated transcriptional regulation of EPB41, with the risk rs157224T allele showing significantly decreased gene expression. Based on cell proliferation, wound healing, and transwell assays as well as the mouse xenograft model, we identify EPB41 as a HCC susceptibility gene in vitro and in vivo. Consistent with this notion, we note that EPB41 expression is significantly decreased in HCC tissue specimens, especially in portal vein metastasis or intrahepatic metastasis, compared to normal tissues. Our results highlight the involvement of regulatory genetic variants in HCC and provide pathogenic insights of this malignancy via a genome-wide approach.


Assuntos
Carcinoma Hepatocelular/genética , Proteínas do Citoesqueleto/genética , Proteínas do Citoesqueleto/metabolismo , Predisposição Genética para Doença , Genoma Humano/genética , Neoplasias Hepáticas/genética , Proteínas de Membrana/genética , Proteínas de Membrana/metabolismo , Alelos , Animais , Povo Asiático/genética , Estudos de Casos e Controles , China/etnologia , Feminino , Genes myc/genética , Genômica , Humanos , Masculino , Camundongos , Pessoa de Meia-Idade , Metástase Neoplásica/genética , Razão de Chances , Polimorfismo de Nucleotídeo Único/genética , Veia Porta , Proteínas Proto-Oncogênicas c-myc/genética , Proteínas Proto-Oncogênicas c-myc/metabolismo , Ensaios Antitumorais Modelo de Xenoenxerto
7.
Hum Mol Genet ; 25(9): 1875-84, 2016 05 01.
Artigo em Inglês | MEDLINE | ID: mdl-26941397

RESUMO

Papillary thyroid carcinoma (PTC) is the most common type of thyroid cancer. However, we know little of mutational spectrum in the Chinese population. Thus, here we report the identification of somatic mutations for Chinese PTC using 402 tumor-normal pairs (Discovery: 91 pairs via exome sequencing; validation: 311 pairs via Sanger sequencing). We observed three distinct mutational signatures, evidently different from the two mutational signatures among Caucasian PTCs. Ten significantly mutated genes were identified, most previously uncharacterized. Notably, we found that long non-coding RNA (lncRNA) GAS8-AS1 is the secondary most frequently altered gene and acts as a novel tumor suppressor in PTC. As a mutation hotspot, the c.713A>G/714T>C dinucleotide substitution was found among 89.1% patients with GAS8-AS1 mutations and associated with advanced PTC disease (P = 0.009). Interestingly, the wild-type lncRNA GAS8-AS1 (A713T714) showed consistently higher capability to inhibit cancer cell growth compared to the mutated lncRNA (G713C714). Further studies also elucidated the oncogene nature of the G protein-coupled receptor LPAR4 and its c.872T>G (p.Ile291Ser) mutation in PTC malignant transformation. The BRAF c.1799T>A (p.Val600Glu) substitution was present in 59.0% Chinese PTCs, more frequently observed in patients with lymph node metastasis (P = 1.6 × 10(-4)). Together our study defines a exome mutational spectrum of PTC in the Chinese population and highlights lncRNA GAS8-AS1 and LPAR4 as potential diagnostics and therapeutic targets.


Assuntos
Carcinoma Papilar/genética , Exoma/genética , Mutação/genética , Proteínas de Neoplasias/genética , RNA Longo não Codificante/genética , Receptores Purinérgicos P2/genética , Neoplasias da Glândula Tireoide/genética , Carcinoma Papilar/secundário , Estudos de Casos e Controles , Feminino , Genótipo , Sequenciamento de Nucleotídeos em Larga Escala/métodos , Humanos , Metástase Linfática , Masculino , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Prognóstico , Glândula Tireoide/metabolismo , Neoplasias da Glândula Tireoide/patologia
8.
Small ; 14(9)2018 03.
Artigo em Inglês | MEDLINE | ID: mdl-29280338

RESUMO

The delivery of tumor-suppressive noncoding RNAs (ncRNAs) including short ncRNAs (i.e., miRNAs) and long ncRNAs (lncRNAs) is put forward to treat tumors. In this work, novel rodlike supramolecular nanoassemblies (CNC @CB[8] @ PGEA) of degradable poly(aspartic acid) (PAsp) derivatives-grafted cellulose nanocrystals (CNCs) and hydroxyl-rich polycations (ethanolamine-functionalized poly(glycidyl methacrylate), PGEA) are proposed via typical cucurbit[8]uril (CB[8])-based host-guest interactions for delivery of different ncRNAs to treat hepatocellular carcinoma (HCC). Spindly CNCs, one kind of natural polysaccharide nanoparticles, possess good biocompatibility and unique physico-chemical properties. PGEA with abundant hydroxyl groups is one promising gene carrier with low cytotoxicity. PAsp can benefit the disassembly and degradability of nanoassemblies within cells. CNC @ CB[8]@PGEA combines the different unique properties of CNC, PGEA, and PAsp. CNC @ CB[8] @ PGEA effectively complexes the expression constructs of miR-101 (plasmid pc3.0-miR-101) and lncRNA MEG3 (plasmid pc3.0-MEG3). CNC @ CB[8] @ PGEA produces much better transfection performances than PGEA-containing assembly units. In addition, the codelivery system of CNC @ CB[8] @ PGEA/(pc3.0-MEG3+pc3.0-miR-101) nanocomplexes demonstrates better efficacy in suppressing HCC than CNC @ CB[8] @ PGEA/pc3.0-MEG3 or CNC @ CB[8] @ PGEA/pc3.0-miR-101 nanocomplexes alone. Such rodlike supramolecular nanoassemblies will provide a promising means to produce efficient delivery vectors of versatile tumor-suppressive nucleic acids.


Assuntos
Peptídeos/química , Poliaminas/química , RNA não Traduzido/administração & dosagem , RNA não Traduzido/química , Ácido Aspártico/química , Carcinoma Hepatocelular/metabolismo , Técnicas de Transferência de Genes , Vetores Genéticos/química , Humanos , Neoplasias Hepáticas/metabolismo , Nanopartículas/química , Polieletrólitos , RNA Longo não Codificante/administração & dosagem , RNA Longo não Codificante/química
9.
Gut ; 66(4): 581-587, 2017 04.
Artigo em Inglês | MEDLINE | ID: mdl-26701879

RESUMO

OBJECTIVE: Although several genome-wide association studies (GWAS) of non-cardia gastric cancer have been published, more novel association signals could be exploited by combining individual studies together, which will further elucidate the genetic susceptibility of non-cardia gastric cancer. DESIGN: We conducted a meta-analysis of two published Chinese GWAS studies (2031 non-cardia gastric cancer cases and 4970 cancer-free controls) and followed by genotyping of additional 3564 cases and 4637 controls in two stages. RESULTS: The overall meta-analysis revealed two new association signals. The first was a novel locus at 5q14.3 and marked by rs7712641 (per-allele OR=0.84, 95% CI 0.80 to 0.88; p=1.21×10-11). This single-nucleotide polymorphism (SNP) marker maps to the intron of the long non-coding RNA, lnc-POLR3G-4 (XLOC_004464), which we observed has lower expression in non-cardia gastric tumour compared with matched normal tissue (Pwilcoxon signed-rank=7.20×10-4). We also identified a new signal at the 1q22 locus, rs80142782 (per-allele OR=0.62; 95% CI 0.56 to 0.69; p=1.71×10-19), which was independent of the previously reported SNP at the same locus, rs4072037 (per-allele OR=0.74; 95% CI 0.69 to 0.79; p=6.28×10-17). Analysis of the new SNP conditioned on the known SNP showed that the new SNP remained genome-wide significant (Pconditional=3.47×10-8). Interestingly, rs80142782 has a minor allele frequency of 0.05 in East Asians but is monomorphic in both European and African populations. CONCLUSION: These findings add new evidence for inherited genetic susceptibility to non-cardia gastric cancer and provide further clues to its aetiology in the Han Chinese population.


Assuntos
Adenocarcinoma/genética , Povo Asiático/genética , Cromossomos Humanos Par 1 , Cromossomos Humanos Par 5 , Predisposição Genética para Doença , Neoplasias Gástricas/genética , China , Loci Gênicos , Estudo de Associação Genômica Ampla , Genótipo , Humanos , Polimorfismo de Nucleotídeo Único , RNA não Traduzido/genética
10.
Carcinogenesis ; 38(1): 12-18, 2017 01.
Artigo em Inglês | MEDLINE | ID: mdl-27797826

RESUMO

In humans, telomeres shorten along with division of somatic cells. Shortened telomere length might result in genomic instability and has been associated with several malignancies. However, the findings in different populations remain conflicting. Therefore, we assessed the association of telomere length in peripheral blood leukocytes with risk of gastric cancer (GC) or esophageal squamous cell carcinoma (ESCC) in a Chinese Han population. A total of 574 GC cases, 740 ESCC cases and 774 age- and sex-matched healthy controls were included in this analysis. Odds ratios (ORs) and 95% confidence intervals (CIs) were calculated by logistic regression. The GC or ESCC patients had significantly shorter relative telomere length (RTL) (median ± SD: GC: 1.20 ± 0.42; ESCC: 1.27 ± 0.48) than controls (1.41 ± 0.58). Four-fold increased GC risk (OR = 4.10, 95% CI = 2.78-6.05, P = 1.10 × 10-12) or 1.56-fold increased ESCC risk (95% CI = 1.12-2.18, P = 0.009) among subjects in the shortest quartile of telomere length was found compared with the highest quartile. We also observed a cumulative effect between short RTL and smoking in intensifying risk of GC (P = 4.50 × 10-9) or ESCC (P = 5.92 × 10-33). Moreover, there were cumulative effects between RTL, smoking and drinking in elevating risk of GC (Ptrend = 0.001) or ESCC (Ptrend = 1.57 × 10-32). Interestingly, RTL-related rs621559 and rs398652 genetic variants are significantly associated with GC risk. These results indicate that short RTL is involved in susceptibility to developing GC or ESCC, alone and in a gene-environment interaction manner. Short telomere length might be a potential molecular marker, in combination with lifestyle risk factors, to identify high-risk individuals.


Assuntos
Carcinoma de Células Escamosas/etiologia , Neoplasias Esofágicas/etiologia , Leucócitos/metabolismo , Fumar/efeitos adversos , Neoplasias Gástricas/etiologia , Encurtamento do Telômero/genética , Telômero/genética , Adulto , Idoso , Idoso de 80 Anos ou mais , Consumo de Bebidas Alcoólicas/efeitos adversos , Biomarcadores Tumorais/análise , Carcinoma de Células Escamosas/patologia , Estudos de Casos e Controles , Neoplasias Esofágicas/patologia , Feminino , Seguimentos , Interação Gene-Ambiente , Humanos , Leucócitos/patologia , Masculino , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Prognóstico , Fatores de Risco , Neoplasias Gástricas/patologia , Adulto Jovem
11.
Mol Carcinog ; 55(1): 90-6, 2016 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-25640751

RESUMO

Long noncoding RNA (lncRNA) HOX transcript antisense RNA (HOTAIR) acts as an oncogene in gastric cancer development. HOTAIR could induce genome-wide retargeting of polycomb-repressive complex 2, trimethylates histone H3 lysine-27 (H3K27me3) and deregulation of multiple downstream genes. Additionally, as the ceRNA of miR-331-3p, HOTAIR may modulate HER2 deregulation in gastric cancer cells. We hypothesized that the functional single nucleotide polymorphisms (SNP) in HOTAIR may affect HOTAIR expression and/or its function and, thus, gastric cancer risk. We examined the association between three haplotype-tagging SNPs (htSNP) across the whole HOTAIR locus and gastric cancer risk as well as the functional relevance of a gastric cancer susceptibility SNP rs920778. Genotypes were determined in two independent hospital-based case-control sets that consisted of 800 gastric cancer patients and 1600 controls. The allele-specific regulation on HOTAIR expression by the rs920778 SNP was examined in vitro and in vivo. We found that the HOTAIR rs920778 TT carriers had a 1.66- and 1.87-fold increased gastric cancer risk in Jinan and Huaian populations compared with the CC carriers (P = 4.2 × 10(-4) and 6.5 × 10(-5)). During inspecting functional relevance of the rs920778 SNP, we observed an allelic regulation of rs920778 on HOTAIR expression in both gastric cancer cell lines and tissue samples, with higher HOTAIR expression among T allele carriers. These findings elucidate that functional genetic variants influencing lncRNA expression may explain a portion of gastric cancer genetic basis.


Assuntos
Predisposição Genética para Doença , Variação Genética , RNA Longo não Codificante/genética , Neoplasias Gástricas/genética , Adulto , Idoso , Alelos , Estudos de Casos e Controles , Feminino , Expressão Gênica , Frequência do Gene , Genótipo , Humanos , Masculino , Pessoa de Meia-Idade , Razão de Chances , Polimorfismo de Nucleotídeo Único , Fatores de Risco
12.
Tumour Biol ; 37(2): 1693-8, 2016 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-26311051

RESUMO

As a well-known oncogene, B cell lymphoma-2 (BCL-2) can promote cancer cell survival through preventing their apoptosis. Several functional BCL-2 single nucleotide polymorphisms (SNPs), such as rs2279115, rs1801018, and rs1564483, have been identified and might contribute to cancer susceptibility. However, the involvement of these SNPs in small cell lung cancer (SCLC) was still unclear. As a result, we investigated associations between these three genetic variants and SCLC risk in a case-control design. Genotypes were determined in two independent case-control sets consisted of 520 SCLC patients and 1040 controls from two medical centers. Odds ratios (ORs) and 95 % confidence intervals (CIs) were calculated utilizing unconditional logistic regression. We found that only BCL-2 rs2279115 genetic variant significantly contributed to decreased SCLC risk in Chinese Han populations, with the rs2279115 A allele as the protective allele. Stratified analyses of association between BCL2 rs2279115 SNP and SCLC risk indicated that the functional polymorphism was only significantly associated with decreased risk of the limited stage SCLC but not the extensive stage disease. Our results indicate that the BCL-2 rs2279115 genetic variant was associated with SCLC risk in Chinese populations and support the hypothesis that SNPs in regulatory regions of oncogenes might contribute to cancer susceptibility.


Assuntos
Predisposição Genética para Doença/genética , Neoplasias Pulmonares/genética , Proteínas Proto-Oncogênicas c-bcl-2/genética , Carcinoma de Pequenas Células do Pulmão/genética , Adulto , Idoso , Povo Asiático/genética , Estudos de Casos e Controles , Feminino , Genótipo , Humanos , Masculino , Pessoa de Meia-Idade , Razão de Chances , Polimorfismo de Nucleotídeo Único/genética
13.
Tumour Biol ; 35(12): 12665-70, 2014 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-25213698

RESUMO

Although the entire etiology of esophageal squamous cell carcinoma (ESCC) is still unclear, alcohol drinking has been identified as a major environmental risk factor. The aldehyde dehydrogenase (ALDH) superfamily members are major enzymes involved in the alcohol-metabolizing pathways. Accumulating evidences demonstrated that ALDH7A1, one of ALDH superfamily members, degrades and detoxifies acetaldehyde generated by alcohol metabolism and have been associated with development and prognosis of multiple cancers. However, it is still unknown if ALDH7A1 single nucleotide polymorphisms (SNPs) contribute to ESCC susceptibility. In this study, we examined the association between sixteen ALDH7A1 SNPs and risk of developing ESCC. Genotypes were determined in 2,098 ESCC patients and 2,150 controls (three independent hospital-based case-control sets from different regions of China). Odds ratios (ORs) and 95 % confidence intervals (CIs) were estimated by logistic regression. Our data demonstrated that only the ALDH7A1 rs13182402 SNP confer susceptibility to ESCC (For AG genotype, OR = 0.75, 95 % CI = 0.66-0.91, P = 4.8 × 10(-6); for GG genotype, OR = 0.59, 95 % CI = 0.41-0.88, P = 0.003). These results are consistent to the biological functions of ALDH7A1 during alcohol metabolism and carcinogenesis.


Assuntos
Aldeído Desidrogenase/genética , Carcinoma de Células Escamosas/genética , Neoplasias Esofágicas/genética , Polimorfismo Genético , Adulto , Idoso , Alelos , Estudos de Casos e Controles , China , Carcinoma de Células Escamosas do Esôfago , Feminino , Frequência do Gene , Predisposição Genética para Doença , Genótipo , Humanos , Masculino , Pessoa de Meia-Idade , Razão de Chances , Polimorfismo de Nucleotídeo Único , Fatores de Risco
14.
J Neurooncol ; 120(1): 11-7, 2014 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-25012956

RESUMO

As a crucial homologous recombination repair gene, RAD52 participates in maintenance of genomic stability and prevention of tumorigenesis. Although several cancer susceptibility RAD52 single nucleotide polymorphisms (SNPs) have been identified previously, little was known on how the RAD52 SNPs are involved in glioma development in Han Chinese. Therefore, we examined the association between five RAD52 SNPs (rs1051669, rs10774474, rs11571378, rs7963551 and rs6489769) and glioma risk using a case-control design. Odds ratios (ORs) and 95 % confidence intervals (CIs) were estimated by logistic regression. We found that only the RAD52 rs7963551 SNP was significantly associated with glioma risk, with the odds of having the rs7963551 AC or CC genotype in patients was 0.49 (95 % CI 0.37-0.65, P = 9.2 × 10(-6)) or 0.39 (95 % CI 0.18-0.81, P = 0.012) compared with the AA genotype. These data are consistent with functional relevance of allelic regulation of RAD52 expression by the rs7963551 SNP and miRNA let-7 in cancer cells. Stratified analyses elucidated that statistically significant association between glioma and rs7963551 SNP only existed in either astrocytic tumors (P = 6.3 × 10(-6)) or oligoastrocytic tumors (P = 0.002). In conclusion, our results support the hypothesis that genetic variants influencing miRNA-mediated regulation of tumor suppressor genes or oncogenes may contribute glioma susceptibility.


Assuntos
Povo Asiático/genética , Neoplasias Encefálicas/etiologia , Glioma/etiologia , MicroRNAs/metabolismo , Polimorfismo de Nucleotídeo Único/genética , Proteína Rad52 de Recombinação e Reparo de DNA/genética , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Sítios de Ligação , Neoplasias Encefálicas/patologia , Estudos de Casos e Controles , Criança , Pré-Escolar , Feminino , Seguimentos , Predisposição Genética para Doença , Genótipo , Glioma/patologia , Humanos , Masculino , MicroRNAs/genética , Pessoa de Meia-Idade , Gradação de Tumores , Prognóstico , Fatores de Risco , Adulto Jovem
15.
Front Biosci (Landmark Ed) ; 29(6): 211, 2024 Jun 11.
Artigo em Inglês | MEDLINE | ID: mdl-38940041

RESUMO

BACKGROUND: Dental pulp stem cells (DPSCs) have self-renewal and multidirectional differentiation potentials. As such, DPSCs have a wide range of clinical applications. Low-level laser therapy (LLLT) has positive photobiostimulatory effects on cell proliferation, angiogenesis, osteogenic differentiation, bone regeneration, and fracture healing. However, there have been few studies on the effect of low-energy lasers on DPSC proliferation. METHODS: DPSCs were obtained from dental pulp tissue. The effects of LLLT on the proliferation of DPSCs and the associated mechanisms were investigated by in vitro culture and laser irradiation. RESULTS: LLLT with energy densities of 3.5 J/cm2 and 14 J/cm2promoted the proliferation of DPSCs. Differential protein expression studies suggested the stimulation of DPSC proliferation by LLLT involved the PI3K-Akt and Rap1 signaling pathways, as well as the apoptosis-related pathway. CONCLUSION: This preliminary study demonstrated that low-energy lasers have a pro-proliferative effect on DPSCs, and identified possible associated mechanisms. Our findings provide a theoretical basis for the clinical application of DPSCs and suggest novel strategies for the treatment of related diseases.


Assuntos
Proliferação de Células , Polpa Dentária , Terapia com Luz de Baixa Intensidade , Células-Tronco , Polpa Dentária/citologia , Polpa Dentária/efeitos da radiação , Proliferação de Células/efeitos da radiação , Humanos , Células-Tronco/efeitos da radiação , Células-Tronco/citologia , Células-Tronco/metabolismo , Terapia com Luz de Baixa Intensidade/métodos , Células Cultivadas , Transdução de Sinais/efeitos da radiação , Apoptose/efeitos da radiação , Diferenciação Celular/efeitos da radiação
16.
Abdom Radiol (NY) ; 49(4): 1074-1083, 2024 04.
Artigo em Inglês | MEDLINE | ID: mdl-38175256

RESUMO

PURPOSE: This study aimed to build and evaluate a deep learning (DL) model to predict vessels encapsulating tumor clusters (VETC) and prognosis preoperatively in patients with hepatocellular carcinoma (HCC). METHODS: 320 pathologically confirmed HCC patients (58 women and 262 men) from two hospitals were included in this retrospective study. Institution 1 (n = 219) and Institution 2 (n = 101) served as the training and external test cohorts, respectively. Tumors were evaluated three-dimensionally and regions of interest were segmented manually in the arterial, portal venous, and delayed phases (AP, PP, and DP). Three ResNet-34 DL models were developed, consisting of three models based on a single sequence. The fusion model was developed by inputting the prediction probability of the output from the three single-sequence models into logistic regression. The area under the receiver operating characteristic curve (AUC) was used to compare performance, and the Delong test was used to compare AUCs. Early recurrence (ER) was defined as recurrence within two years of surgery and early recurrence-free survival (ERFS) rate was evaluated by Kaplan-Meier survival analysis. RESULTS: Among the 320 HCC patients, 227 were VETC- and 93 were VETC+ . In the external test cohort, the fusion model showed an AUC of 0.772, a sensitivity of 0.80, and a specificity of 0.61. The fusion model-based prediction of VETC high-risk and low-risk categories exhibits a significant difference in ERFS rates, akin to the outcomes observed in VETC + and VETC- confirmed through pathological analyses (p < 0.05). CONCLUSIONS: A DL framework based on ResNet-34 has demonstrated potential in facilitating non-invasive prediction of VETC as well as patient prognosis.


Assuntos
Carcinoma Hepatocelular , Aprendizado Profundo , Neoplasias Hepáticas , Neoplasias Vasculares , Masculino , Humanos , Feminino , Carcinoma Hepatocelular/diagnóstico por imagem , Carcinoma Hepatocelular/cirurgia , Estudos Retrospectivos , Neoplasias Hepáticas/diagnóstico por imagem , Neoplasias Hepáticas/cirurgia , Imageamento por Ressonância Magnética , Prognóstico
17.
ScientificWorldJournal ; 2013: 460202, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-24453853

RESUMO

BACKGROUND: gcrR gene acts as a negative regulator related to sucrose-dependent adherence in S. mutans. It is constructive to test the potential capacity of mutans with gcrR gene deficient in bacteria replacement therapy. METHODS: In this study, we constructed the mutant by homologous recombination. The morphological characteristics of biofilms were analyzed by confocal laser scanning microscopy. S. mutans UA159 and the mutant MS-gcrR-def were inoculated, respectively, or together for competitive testing in vitro and in rat model. RESULTS: Adhesion assay showed that the adhesion ability of the mutant increased relative to the wild type, especially in the early stage. MS-gcrR-def out-competed S. mutans UA159 in vitro biofilm, and correspondingly coinfection displayed significantly fewer caries in vivo. The former possessed both a lower level of acid production and a stronger colonization potential than S. mutans UA159. CONCLUSION: These findings demonstrate that MS-gcrR-def appears to be a good candidate for replacement therapy.


Assuntos
Proteínas de Bactérias , Biofilmes , Cárie Dentária , Deleção de Genes , Streptococcus mutans/fisiologia , Fatores de Transcrição , Animais , Cárie Dentária/microbiologia , Cárie Dentária/terapia , Feminino , Ratos , Ratos Sprague-Dawley
18.
Int Dent J ; 73(4): 473-480, 2023 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-37088662

RESUMO

This review discusses the effects of ginseng and its extracts in the treatment of dental caries, periodontal diseases, endodontic diseases, oral cancers, oral mucosal diseases, and some other dental associations. In the meantime, bioavailability and safety application of ginseng products are discussed. All of the articles reviewed were from PubMed, Embase, Cochrane Library, Web of Science, China National Knowledge Infrastructure, Wanfang Data, and VIP Chinese Science and Technology Periodicals Full-Text Database through November 2022, including full-text English or non-English publications. Ginseng and its extracts were shown to have beneficial effects on oral diseases, and further studies are needed to understand the mechanisms and confirm the effects in humans.


Assuntos
Cárie Dentária , Panax , Doenças Periodontais , Humanos , Saúde Bucal , Cárie Dentária/prevenção & controle , Doenças Periodontais/tratamento farmacológico , Doenças Periodontais/prevenção & controle , China
19.
Front Mol Biosci ; 10: 1232875, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37670814

RESUMO

Introduction: The tumor microenvironment (TME) is crucial for the development of head and neck squamous cell carcinoma (HNSCC). However, the correlation of the characteristics of the TME and the prognosis of patients with HNSCC remains less known. Methods: In this study, we calculated the immune and stromal cell scores using the "estimate" R package. Kaplan-Meier survival and CIBERSORT algorithm analyses were applied in this study. Results: We identified seven new markers: FCGR3B, IGHV3-64, AC023449.2, IGKV1D-8, FCGR2A, WDFY4, and HBQ1. Subsequently, a risk model was constructed and all HNSCC samples were grouped into low- and high-risk groups. The results of both the Kaplan-Meier survival and receiver operating characteristic curve (ROC) analyses showed that the prognosis indicated by the model was accurate (0.758, 0.756, and 0.666 for 1-, 3- and 5-year survival rates). In addition, we applied the CIBERSORT algorithm to reveal the significant differences in the infiltration levels of immune cells between the two risk groups. Discussion: Our study elucidated the roles of the TME and identified new prognostic biomarkers for patients with HNSCC.

20.
Abdom Radiol (NY) ; 48(2): 554-566, 2023 02.
Artigo em Inglês | MEDLINE | ID: mdl-36385192

RESUMO

PURPOSE: This study aimed to analyze imaging features based on preoperative dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) for the identification of vessels encapsulating tumor clusters (VETC)-microvascular invasion (MVI) in hepatocellular carcinoma (HCC), VM-HCC pattern. METHODS: Patients who underwent hepatectomy and preoperative DCE-MRI between January 2015 and March 2021 were retrospectively analyzed. Clinical and imaging features related to VM-HCC (VETC + /MVI-, VETC-/MVI +, VETC + /MVI +) and Non-VM-HCC (VETC-/MVI-) were determined by multivariable logistic regression analyses. Early and overall recurrence were determined using the Kaplan-Meier survival curve. Indicators of early and overall recurrence were identified using the Cox proportional hazard regression model. RESULTS: In total, 221 patients (177 men, 44 women; median age, 60 years; interquartile range, 52-66 years) were evaluated. The multivariable logistic regression analyses revealed fetoprotein > 400 ng/mL (odds ratio [OR] = 2.17, 95% confidence interval [CI] 1.07, 4.41, p = 0.033), intratumor vascularity (OR 2.15, 95% CI 1.07, 4.31, p = 0.031), and enhancement pattern (OR 2.71, 95% CI 1.17, 6.03, p = 0.019) as independent predictors of VM-HCC. In Kaplan-Meier survival analysis, intratumor vascularity was associated with early and overall recurrence (p < 0.05). CONCLUSION: Based on DCE-MRI, intratumor vascularity can be used to characterize VM-HCC and is of prognostic significance for recurrence in patients with HCC.


Assuntos
Carcinoma Hepatocelular , Neoplasias Hepáticas , Neoplasias Vasculares , Masculino , Humanos , Feminino , Pessoa de Meia-Idade , Carcinoma Hepatocelular/diagnóstico por imagem , Carcinoma Hepatocelular/cirurgia , Neoplasias Hepáticas/diagnóstico por imagem , Neoplasias Hepáticas/cirurgia , Estudos Retrospectivos , Invasividade Neoplásica/patologia , Imageamento por Ressonância Magnética/métodos
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA