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result(s) for
"Qian, Tingting"
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CTRP3 Activates the AMPK/SIRT1-PGC-1α Pathway to Protect Mitochondrial Biogenesis and Functions in Cerebral Ischemic Stroke
2020
C1q/tumor necrosis factor-related protein-3 (CTRP3) had shown its angiogenesis and enhancement of mitochondrial biogenesis properties in the treatment of myocardial infarction, but its potential roles in cerebral ischemic stroke had not been fully understood. This study aimed to clarify the underlying mechanism of how CTRP3 regulated mitochondrial functions in hippocampal neuronal cells (HPPNCs) after oxygen-glucose deprivation (OGD)/reoxygenation (R) treatment. Results showed that impeded CTRP3 expression and weakened viability were detected in OGD/R treated HPPNCs. CTRP3 showed its ability to enhance the viability and inhibited apoptosis of HPPNCs after OGD/R treatment and it could also promote the mitochondrial biogenesis and physiological functions. Silencing of PGC-1α partially abolished the protective function of CTRP3 on mitochondria and CTRP3 mediated the expression of PGC-1α via the AMPK/SIRT1-PGC-1α pathway. These findings provided information that CTRP3 prevented mitochondria from OGD/R injury through activating the AMPK/SIRT1-PGC-1α pathway. Our study suggested that CTRP3 might have the potential to become an emerging protective agent applied in the reperfusion treatment of ischemic stroke.
Journal Article
Diurnal Variations of Presummer Rainfall over Southern China
2017
In this study, the presummer diurnal cycle of rainfall (DCR) over southern China is examined using the merged 0.1°-resolution gridded hourly rain gauge and satellite rainfall dataset and the National Centers for Environmental Prediction Final Global Analysis during April to June of 2008–2015. Results show pronounced diurnal variations in rainfall amount, frequency, and intensity over southern China, with substantially different amplitudes from southwestern to southeastern China, and from the pre- to postmonsoon-onset period. Southwestern China often encounters significant nocturnal-to-morning rainfall under the influence of enhanced nocturnal low-level southwesterly winds. Southeastern China is dominated by afternoon rainfall, as a result of surface heating, likely aided by local topographical lifting. Both the pre- and postmonsoon-onset periods exhibit two diurnal rainfall peaks: one in the early morning and the other in the late afternoon. But the latter shows the two peaks with nearly equal amplitude whereas the former displays a much larger early morning peak than that in the late afternoon. Three propagating modes accounting for the presummer DCR are found: (i) an eastward- or southeastward-propagating mode occurs mostly over southwestern China that is associated with enhanced transport of warm and moist air from tropical origin and the induced low-level convergence, (ii) a quasi-stationary mode over southeastern China appears locally in the warm sector with weak-gradient flows, and (iii) an inland-propagating mode occurs during the daytime in association with sea breezes along the southern coastal regions, especially evident throughout the postmonsoon-onset period.
Journal Article
YOLO-LCE: A Lightweight YOLOv8 Model for Agricultural Pest Detection
by
Lu, Shenglian
,
Qian, Tingting
,
Cen, Xinyu
in
Accuracy
,
Agricultural industry
,
Agricultural pests
2025
Agricultural pest detection through image analysis is a key technology in automated pest-monitoring systems. However, some existing pest detection models face excessive model complexity. This study proposes YOLO-LCE, a lightweight model based on the YOLOv8 architecture for agricultural pest detection. Firstly, a Lightweight Complementary Residual (LCR) module is proposed to extract complementary features through a dual-branch structure. It enhances detection performance and reduces model complexity. Additionally, Efficient Partial Convolution (EPConv) is proposed as a downsampling operator. It adopts an asymmetric channel splitting strategy to efficiently utilize features. Furthermore, the Ghost module is introduced to the detection head to reduce computational overhead. Finally, WIoUv3 is used to improve detection performance further. YOLO-LCE is evaluated on the Pest24 dataset. Compared to the baseline model, YOLO-LCE achieves mAP50 improvement of 1.7 percentage points, mAP50-95 improvement of 0.4 percentage points, and precision improvement of 0.5 percentage points. For computational efficiency, parameters are reduced by 43.9%, and GFLOPs are reduced by 33.3%. These metrics demonstrate that YOLO-LCE improves detection accuracy while reducing computational complexity, providing an effective solution for lightweight pest detection.
Journal Article
Role of microRNAs, circRNAs and long noncoding RNAs in acute myeloid leukemia
2019
Acute myeloid leukemia (AML) is a malignant tumor of the immature myeloid hematopoietic cells in the bone marrow (BM). It is a highly heterogeneous disease, with rising morbidity and mortality in older patients. Although researches over the past decades have improved our understanding of AML, its pathogenesis has not yet been fully elucidated. Long noncoding RNAs (lncRNAs), microRNAs (miRNAs), and circular RNAs (circRNAs) are three noncoding RNA (ncRNA) molecules that regulate DNA transcription and translation. With the development of RNA-Seq technology, more and more ncRNAs that are closely related to AML leukemogenesis have been discovered. Numerous studies have found that these ncRNAs play an important role in leukemia cell proliferation, differentiation, and apoptosis. Some may potentially be used as prognostic biomarkers. In this systematic review, we briefly described the characteristics and molecular functions of three groups of ncRNAs, including lncRNAs, miRNAs, and circRNAs, and discussed their relationships with AML in detail.
Journal Article
Reduced renal function may explain the higher prevalence of hyperuricemia in older people
2021
This study aimed to investigate the contribution of renal dysfunction to enhanced hyperuricemia prevalence in older people. A cohort of 13,288 Chinese people aged between 40 and 95 years were recruited from January to May 2019. Serum uric acid concentration and estimated glomerular filtration rate [eGFR] were measured. The associations between age or eGFR and serum uric acid or hyperuricemia were analyzed using linear or binary logistic regression adjusting for risk factors. Uric acid concentration and prevalence of hyperuricemia were greater in older participants. Adjustment for reduced renal function (eGFR < 60 mL/min/1.73 m
2
) eliminated the associations between older age and higher uric acid concentration and between older age and higher prevalence of hyperuricemia diagnosis, whereas adjustment for other risk factors did not change those associations. Lower eGFR was associated with higher uric acid concentration both before (β = − 0.296,
P
< 0.001) and after adjustment for age (β = − 0.313,
P
< 0.001). Reduced renal function was associated with hyperuricemia diagnosis both before (odds ratio, OR, 3.64; 95% CI 3.10–4.28;
P
< 0.001) and after adjustment for age (adjusted OR, 3.82; 95% CI 3.22–4.54;
P
< 0.001). Mean serum uric acid and prevalence of hyperuricemia were higher in people with eGFR < 60 mL/min/1.73 m
2
than those with eGFR ≥ 60 mL/min/1.73 m
2
. The prevalence of reduced renal function increased with older age (
P
< 0.001). This study suggests that reduced renal function can explain the increased uric acid levels and hyperuricemia diagnoses in older people.
Journal Article
High IFITM3 expression predicts adverse prognosis in acute myeloid leukemia
by
Cui, Wei
,
Qian Tingting
,
Cui Longzhen
in
Acute myeloid leukemia
,
Cell adhesion & migration
,
Cell migration
2020
Acute myeloid leukemia (AML) is a malignancy caused by the uncontrolled and dysregulated clonal expansion of abnormal myeloid primordial cells. In general, the prognosis of AML remains poor despite new discoveries in its pathogenesis and treatment. It is crucial to find early and sensitive biomarkers and continue to explore active targeted treatments. Interferon-induced transmembrane protein (IFITM) family is an important part of the interferon signaling pathway and participate in the regulation of immune cell signaling, adhesion, cancer, and liver cell migration. However, the clinical and prognostic value of the IFITM family in AML has rarely been studied. We screened The Cancer Genome Atlas database and found 155 AML patients with IFITM family (IFITM1–5) expression data. In patients who only received chemotherapy, those with high IFITM3 expression had significantly shorter event-free survival (EFS) and overall survival (OS) than patients with low expression (all P < 0.05). Multivariate analysis demonstrated that high IFITM3 expression was an independent risk factor for EFS and OS in patients only received chemotherapy (all P < 0.05). In patients who underwent allogeneic hematopoietic stem cell transplantation (allo-HSCT), however, all IFITM members had no impact on either EFS or OS. In conclusion, our study elucidated that high IFITM3 expression could be an adverse prognostic factor for AML, whose effect might be overcome by allo-HSCT.
Journal Article
The roles and mechanisms of gut microbiome and metabolome in patients with cerebral infarction
2023
As the most common type of stroke, ischemic stroke, also known as cerebral infarction (CI), with its high mortality and disability rate, has placed a huge burden on social economy and public health. Treatment methods for CI mainly include thrombectomy, thrombolysis, drug therapy, and so on. However, these treatments have certain timeliness and different side effects. In recent years, the gut-brain axis has become a hot topic, and its role in nervous system diseases has been confirmed by increasing evidences. The intestinal microbiota, as an important part of the gut-brain axis, has a non-negligible impact on the progression of CI through mechanisms such as inflammatory response and damage-associated molecular patterns, and changes in the composition of intestinal microbiota can also serve as the basis for predicting CI. At the same time, the diagnosis of CI requires more high-throughput techniques, and the analysis method of metabolomics just fits this demand. This paper reviewed the changes of intestinal microbiota in patients within CI and the effects of the intestinal microbiota on the course of CI, and summarized the therapeutic methods of the intervention with the intestinal microbiota. Furthermore, metabolic changes of CI patients were also discussed to reveal the molecular characteristics of CI and to elucidate the potential pathologic pathway of its interference.
Journal Article
The establishment of a prognostic scoring model based on the new tumor immune microenvironment classification in acute myeloid leukemia
2021
Background
The high degree of heterogeneity brought great challenges to the diagnosis and treatment of acute myeloid leukemia (AML). Although several different AML prognostic scoring models have been proposed to assess the prognosis of patients, the accuracy still needs to be improved. As important components of the tumor microenvironment, immune cells played important roles in the physiological functions of tumors and had certain research value. Therefore, whether the tumor immune microenvironment (TIME) can be used to assess the prognosis of AML aroused our great interest.
Methods
The patients’ gene expression profile from 7 GEO databases was normalized after removing the batch effect. TIME cell components were explored through Xcell tools and then hierarchically clustered to establish TIME classification. Subsequently, a prognostic model was established by Lasso-Cox. Multiple GEO databases and the Cancer Genome Atlas dataset were employed to validate the prognostic performance of the model. Receiver operating characteristic (ROC) and the concordance index (C-index) were utilized to assess the prognostic efficacy.
Results
After analyzing the composition of TIME cells in AML, we found infiltration of ten types of cells with prognostic significance. Then using hierarchical clustering methods, we established a TIME classification system, which clustered all patients into three groups with distinct prognostic characteristics. Using the differential genes between the first and third groups in the TIME classification, we constructed a 121-gene prognostic model. The model successfully divided 1229 patients into the low and high groups which had obvious differences in prognosis. The high group with shorter overall survival had more patients older than 60 years and more poor-risk patients (both
P
< 0.001). Besides, the model can perform well in multiple datasets and could further stratify the cytogenetically normal AML patients and intermediate-risk AML population. Compared with the European Leukemia Net Risk Stratification System and other AML prognostic models, our model had the highest C-index and the largest AUC of the ROC curve, which demonstrated that our model had the best prognostic efficacy.
Conclusion
A prognostic model for AML based on the TIME classification was constructed in our study, which may provide a new strategy for precision treatment in AML.
Journal Article
CLEC11A as a potential biomarker for prognosis and response to immunotherapy in colon adenocarcinoma
2025
Colon adenocarcinoma (COAD) ranks among the most prevalent malignancies. C-type lectin domain family 11 member A (CLEC11A) plays a role in the initiation and progression of various cancers. However, its involvement in COAD remains unclear. This study reveals that CLEC11A expression is significantly elevated in COAD tissues compared to normal counterparts. Moreover, higher CLEC11A levels correlate with advanced T and N stages as well as pathological stage. Survival analysis further indicates that elevated CLEC11A expression is linked to poor prognosis. Cox regression analysis identifies CLEC11A as an independent prognostic factor for unfavorable survival outcomes. Additionally, increased CLEC11A expression shows a positive association with immune cell infiltration and immune checkpoint markers. CLEC11A-related differentially expressed genes (DEGs) were also identified, and functional enrichment analyses were conducted to elucidate the biological roles of CLEC11A. Unsupervised cluster analysis of these DEGs across distinct subgroups was also performed. In conclusion, CLEC11A has the potential as both a prognostic biomarker and a modulator of immune responses in COAD.
Journal Article
Prognostic role of minichromosome maintenance family in multiple myeloma
2020
Multiple myeloma (MM) is a plasma cell malignancy. The minichromosome maintenance (MCM) family involve in DNA replication and is vital in limiting replication in cell cycle. The prognostic role of MCMs in MM is still unclear. We took four independent GEO datasets to analyze the relationship between the expression of MCMs and myeloma progression and survival. The expression of MCMs showed an upward trend with myeloma progression in 205 patients. High MCM2/3/4/6/8 expression was associated with both poor EFS and OS (all p < 0.050). Multivariate analysis demonstrated that high MCM2 expression, B2M, and LDH were independent risk factors. Moreover, the combination of MCM2/B2M and MCM2/LDH was a better tool in prognostication. In conclusion, high MCM2 expression is an independent adverse prognostic factor and could be used as a prognostic biomarker in MM.
Journal Article