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72 result(s) for "Xiao, Yunjun"
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The oncogenic roles and clinical implications of YAP/TAZ in breast cancer
Breast cancer (BC) is the most commonly diagnosed form of cancer and a leading cause of cancer-related deaths among women worldwide. Yes-associated protein (YAP) and transcriptional coactivator with PDZ-binding motif (TAZ) are homologous transcriptional coactivators and downstream effectors of Hippo signalling. YAP/TAZ activation has been revealed to play essential roles in multiple events of BC development, including tumour initiation, progression, metastasis, drug resistance and stemness regulations. In this review, we will first give an overview of YAP/TAZ-mediated oncogenesis in BC, and then systematically summarise the oncogenic roles of YAP/TAZ in various BC subtypes, BC stem cells (BCSCs) and tumour microenvironments (TMEs). Based on these findings, we will further discuss the clinical implications of YAP/TAZ-based targeted therapies in BC and the potential future direction.
Associations between dietary patterns and the risk of breast cancer: a systematic review and meta-analysis of observational studies
Background Epidemiologic evidence suggests that certain dietary patterns were associated with breast cancer risk, but the results have been inconclusive. We assessed the associations between different dietary patterns and the risk of breast cancer by conducting a meta-analysis of observational studies. Methods Relevant articles were searched in PubMed, Embase, and Cochrane library databases through September 2017. Multivariable-adjusted relative risks (RRs) and 95% confidence intervals (CIs) comparing the highest and lowest categories of Western and prudent dietary patterns were combined by using the random-effects meta-analyses. Results We identified 32 eligible articles including 14 cohort and 18 case-control studies (34 Western and 35 prudent studies). The pooled analyses found that a Western dietary pattern was associated with a 14% increased risk (RR 1.14, 95% CI 1.02, 1.28), whereas a prudent dietary pattern was associated with an 18% reduced risk of breast cancer (RR 0.82, 95% CI 0.75, 0.89). In addition, sub-group analyses showed that the positive association between a Western dietary pattern and breast cancer risk was significant among postmenopausal (RR 1.20, 95% CI 1.06, 1.35), but not premenopausal women (RR 1.18, 95% CI 0.99, 1.40), and significant for hormone receptor-positive tumors (RR 1.18, 95% CI 1.04, 1.33), but not receptor-negative tumors (RR 0.97, 95% CI 0.83, 1.12). In contrast, the inverse association between a prudent dietary pattern and breast cancer was significant in premenopausal (RR 0.77, 95% CI 0.61, 0.98), but not postmenopausal women (RR 0.88, 95% CI 0.74, 1.03), and significant for both hormone receptor-positive and receptor-negative tumors. Conclusions The results of the current meta-analysis suggest a possible increased risk of breast cancer associated with a Western dietary pattern and a reduced risk with a prudent dietary pattern. Large-scale cohort studies with a high quality need to be conducted to further confirm the findings of the current meta-analysis. As dietary patterns are modifiable, these findings may provide viable strategies for breast cancer prevention through changes in dietary intake.
Iron metabolism and its association with dyslipidemia risk in children and adolescents: a cross-sectional study
Background Information on the association between iron metabolism and dyslipidaemia in children is limited. Thus, this study aims to evaluate the iron metabolic status of children with different body mass index (BMI) and to examine the association between iron metabolism and dyslipidaemia risk. Method In total, 1866 children and adolescents aged 7–18 were enrolled in this study, including 912 boys and 954 girls. In this cross-sectional study, parameters for anthropometry, lipids and iron metabolism including transferrin, soluble transferrin receptor (sTfR), ferritin and serum iron (SF) were evaluated. Data regarding demographic characteristics, diet, and physical activity were collected by self-reported questionnaires. Results The prevalence of dyslipidaemia and iron deficiency in children and adolescents increased based on BMI categories (both P  < 0.05) and were 58.3 and 8.9% in subjects with obesity, respectively. The lowest SF and the highest ferritin levels were observed in subjects who were obese (both P  < 0.001). Subjects with dyslipidaemia had lower SF, transferrin and sTfR levels by different BMI categories, and those who were obese had higher ferritin levels (all P  < 0.05). Most importantly, higher concentrations of transferrin and sTfR were related to lower dyslipidaemia risk ( OR for transferrin: 0.49, 95% CI : 0.33–0.71; OR for sTfR: 0.68, 95% CI : 0.46–0.99). Conclusions A downward trend in SF level by BMI categories and the highest ferritin level in subjects with obesity suggested that iron storage was associated with BMI in children and adolescents. Moreover, an inverse relationship was observed between transferrin and sTfR concentrations and dyslipidaemia risk in children with different BMI.
A systematic analysis of the network of lncRNAs and mRNAs regulated by TP53 and TP53 mutants with hotspot mutations
The transcription factor TP53 exhibits the preeminent frequency of genetic mutations across various cancer types. Long non-coding RNAs (lncRNAs) stand as pivotal molecules in the initiation and progression of carcinogenesis. Nonetheless, the specific roles of TP53-regulated lncRNAs in colon cancer remain largely unexplored. In this study, we conducted a comprehensive analysis of lncRNA and mRNA alterations in DLD1 colon cancer cells, induced by the overexpression of wild-type TP53, as well as two TP53 hotspot mutations, namely TP53-R175H and TP53-R175P, leveraging transcriptomic deep sequencing technology. Across all three experimental groups, large-scale datasets encompassing approximately 300 lncRNAs and 1000 mRNAs were identified. Integrative analyses, employing KEGG and Reactome functional annotations of differentially expressed lncRNA targets, coupled with enrichment of differentially expressed mRNAs, unveiled several shared downstream pathways. From this convergence, we curated a list of predicted TP53-regulated lncRNAs exhibiting differential expression patterns. Further pathway enrichments focusing on these lncRNAs converged on DNA replication and cell cycle processes, mirroring the well-established functions of TP53. Remarkably, lncRNA H19 and LINC00969 emerged as common denominators across all three cell groups, hinting at their potential as targets for further study in colon cancer. Collectively, our findings delineate the repertoire of potential TP53-regulated lncRNAs and their downstream signaling cascades in colon cancer cells, contingent upon TP53 overexpression or the presence of TP53-R175H/R175P mutations. This study underscores the intricacies of TP53 mutation functionality in colon tumorigenesis, orchestrated through multiple lncRNAs.
Association between whole grain intake and breast cancer risk: a systematic review and meta-analysis of observational studies
Background Epidemiological studies have found that high whole grain intake may be associated with a reduced risk of breast cancer. However, the evidence has not been consistent. We conducted a meta-analysis to quantitatively assess the association between whole grain intake and breast cancer risk. Methods Relevant observational studies were identified by searching PubMed, Embase, Cochrane library databases, and Google Scholar through April 2017. Summary relative risk (RR) estimates were calculated using random-effects meta-analysis. Results A total of 11 studies, including 4 cohort and 7 case-control studies and involving 131,151 participants and 11,589 breast cancer cases, were included in the current meta-analysis. The pooled RR of breast cancer for those with high versus low whole grain intake was 0.84 (95% confidence interval [CI]: 0.74 to 0.96, p  = 0.009; I 2  = 63.8%, p for heterogeneity  = 0.002). Subgroup analysis by study design found a significant inverse association in the case-control studies (RR: 0.69; 95% CI: 0.56 to 0.87, p  = 0.001; I 2  = 58.2%, p for heterogeneity  = 0.026), but not in the cohort studies (RR, 0.96; 95% CI: 0.82 to 1.14, p  = 0.69; I 2  = 66.7%, p for heterogeneity = 0.029). In addition, stratified analysis suggested that sample size could be a potential source of heterogeneity. Conclusions Results of the current meta-analysis suggest that high intake of whole grains might be inversely associated with a reduced risk of breast cancer, and the inverse association was only observed in case-control but not cohort studies. More large-scale cohort studies are needed to confirm the inverse association observed.
Graph constraint-based robust latent space low-rank and sparse subspace clustering
Recently, low-rank and sparse representation-based methods have achieved great success in subspace clustering, which aims to cluster data lying in a union of subspaces. However, most methods fail if the data samples are corrupted by noise and outliers. To solve this problem, we propose a novel robust method that uses the F-norm for dealing with universal noise and the l 1 norm or the l 2 , 1 norm for capturing outliers. The proposed method can find a low-dimensional latent space and a low-rank and sparse representation simultaneously. To preserve the local manifold structure of the data, we have adopted a graph constraint in our model to obtain a discriminative latent space. Extensive experiments on several face benchmark datasets show that our proposed method performs better than state-of-the-art subspace clustering methods.
Effects of nut consumption on selected inflammatory markers: a systematic review and meta-analysis of randomized controlled trials
•Nut consumption significantly reduced intercellular adhesion molecule (ICAM)-1 levels.•ICAM-1 reduction was possibly due to the effect of mixed nuts.•Nut consumption reduced ICAM-1 and vascular cell adhesion molecule-1 in long-term trials.•Long-term intake of mixed nuts is recommended. Several randomized controlled trials (RCTs) have assessed the effects of nut consumption on inflammatory markers. However, the results have been inconsistent. The aim of this meta-analysis of RCTs was to quantitatively evaluate the effects of nut consumption on selected inflammatory markers. PubMed, Embase, Cochrane Library database, and Google Scholar were searched for published RCTs that reported the effects of nuts on inflammatory markers as primary or secondary outcomes in an adult population (aged ≥18 y). Summary estimates of weighted mean differences (WMDs) and 95% confidence intervals (CIs) were calculated using random-effects meta-analysis. Twenty-three RCTs met the inclusion criteria. Overall, nut consumption significantly reduced the levels of intercellular adhesion molecule (ICAM)-1 (WMD, −0.17; 95% CI, −0.32 to −0.03; P = 0.01), but had no significant effect on other inflammatory markers. In the subgroup analyses by nut types, mixed nuts had a significant effect on ICAM-1 reduction. The significant effect of nuts on ICAM-1 reduction was only observed in parallel, but not crossover RCTs. Additionally, nut consumption significantly reduced ICAM-1 and vascular cell adhesion molecule-1 levels in long-term (≥12 wk), but not short-term (<12 wk) RCTs. No significant heterogeneity or publication bias was observed in the studies included. Nut consumption significantly reduced ICAM-1 levels, but had no effect on other inflammatory markers. More studies are needed to assess the effects of nuts on inflammation.
Circulating Fibroblast Growth Factor 23 Is Associated with Angiographic Severity and Extent of Coronary Artery Disease
Fibroblast growth factor 23 (FGF23) is a circulating regulator of phosphate and vitamin D metabolism and is associated with coronary artery calcification, and has been implicated in the pathogenesis of cardiovascular disease. The aim of this study was to determine whether circulating FGF23 concentration is independently associated with the severity and extent of coronary artery disease in patients undergoing coronary angiography. A cross-sectional design was used to examine the relationship between serum FGF23 and the severity and extent of coronary artery stenosis in 2076 patients undergoing coronary angiography (1263 male and 813 female, mean aged 62.5 years). Subgroup analyses were performed to assess the associations between FGF23 and coronary arterial plaque characteristics evaluated by intravascular ultrasound and 12-month incidence of target vessel revascularization (TVR) and target lesion revascularization (TLR). We found a stepwise increase of serum FGF23 concentrations in patients with mild, moderate, severe stenosis or with increased number of stenotic vessels compared with those without stenosis (P<0.001). Serum FGF23 concentration was positively correlated with stenosis scores as the global index of the severity and extent of coronary artery stenosis in both male and female (r = 0.315 and r = 0.291, P<0.001). In multiple regression analyses, serum FGF23 concentration was a significant determinant of the stenosis scores independent of other traditional risk factors (standardized β = 0.326, P<0.001). Furthermore, subgroup analyses found FGF23 was significantly associated with plaque and dense calcium volumes. Multiple logistic regression analyses showed that serum FGF23 levels were significantly independent predictors of TVR and TLR. We report an independent association between circulating FGF23 concentration and the severity and extent of coronary artery stenosis in the coronary angiographic patients. Future studies are needed to elucidate the potential biological mechanisms and whether FGF23 is a modifiable cardiovascular risk factor.
miR-221/222 induce instability of p53 By downregulating deubiquitinase YOD1 in acute myeloid leukemia
Acute myeloid leukemia (AML) is a hematological malignancy characterized by the impaired differentiation and uncontrolled proliferation of myeloid blasts. Tumor suppressor p53 is often downregulated in AML cells via ubiquitination-mediated degradation. While the role of E3 ligase MDM2 in p53 ubiquitination is well-accepted, little is known about the involvement of deubiquitinases (DUBs). Herein, we found that the expression of YOD1, among several DUBs, is substantially reduced in blood cells from AML patients. We identified that YOD1 deubiqutinated and stabilized p53 through interaction via N-terminus of p53 and OTU domain of YOD1. In addition, expression levels of YOD1 were suppressed by elevated miR-221/222 in AML cells through binding to the 3′ untranslated region of YOD1, as verified by reporter gene assays. Treatment of cells with miR-221/222 mimics and inhibitors yielded the expected effects on YOD1 expressions, in agreement with the negative correlation observed between the expression levels of miR-221/222 and YOD1 in AML cells. Finally, overexpression of YOD1 stabilized p53, upregulated pro-apoptotic p53 downstream genes, and increased the sensitivity of AML cells to FLT3 inhibitors remarkably. Collectively, our study identified a pathway connecting miR-221/222, YOD1, and p53 in AML. Targeting miR-221/222 and stimulating YOD1 activity may improve the therapeutic effects of FLT3 inhibitors in patients with AML.
Relationship between lipid profiles and plasma total homocysteine, cysteine and the risk of coronary artery disease in coronary angiographic subjects
Background Homocysteine and cysteine are considered as risk factors of cardiovascular disease. Homocysteine influences the liver expression of ApoA-I and decreases its blood level and HDL in genetic mice model. We aimed therefore to evaluate whether homocysteine and cysteine are associated with lipid parameters, and the joint effects of them on the risk of coronary artery disease (CAD). Plasma total homocysteine (tHcy), cysteine (tCys) and lipid markers were measured in 2058 consecutive coronary artery angiographic patients. Results Plasma tHcy but not tCys correlated negatively with ApoA-I (r = -0.153, P < 0.001) and with HDL cholesterol (r = -0.148, P < 0.001), and correlated positively with the risk of CAD (OR: 1.61; 95% confidence interval; 1.26 to 2.05). Combination of high tHcy and high tCys levels was associated with decreased ApoA-I and HDL cholesterol levels, and with increased risk of CAD (OR: 1.696, 95% CI (1.301-2.211)). Furthermore, low HDL cholesterol combined with low tHcy or high tHcy all had increased risk for CAD (OR: 1.254, 95% CI (1.114-1.565); OR: 1.332, 95% CI (1.093-1.624); respectively) whereas high HDL cholesterol counteracted the harmful effect of high tHcy on the risk of CAD. However, only the combination of high tHcy and high ApoA-I had an increased risk for CAD (OR: 1.438, 95% CI (1.170-1.768)). Conclusions The association of homocysteine and cysteine, ApoA-I or HDL cholesterol and their joint effects provide new insights on its role on CAD.