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"Han, Yanyan"
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Analysis of the role of the Hippo pathway in cancer
2019
Cancer is a serious health issue in the world due to a large body of cancer-related human deaths, and there is no current treatment available to efficiently treat the disease as the tumor is often diagnosed at a serious stage. Moreover, Cancer cells are often resistant to chemotherapy, radiotherapy, and molecular-targeted therapy. Upon further knowledge of mechanisms of tumorigenesis, aggressiveness, metastasis, and resistance to treatments, it is necessary to detect the disease at an earlier stage and for a better response to therapy. The hippo pathway possesses the unique capacity to lead to tumorigenesis. Mutations and altered expression of its core components (MST1/2, LATS1/2, YAP and TAZ) promote the migration, invasion, malignancy of cancer cells. The biological significance and deregulation of it have received a large body of interests in the past few years. Further understanding of hippo pathway will be responsible for cancer treatment. In this review, we try to discover the function of hippo pathway in different diversity of cancers, and discuss how Hippo pathway contributes to other cellular signaling pathways. Also, we try to describe how microRNAs, circRNAs, and ZNFs regulate hippo pathway in the process of cancer. It is necessary to find new therapy strategies for cancer.
Journal Article
The Fractional Type Marcinkiewicz Integrals and Commutators on Weighted Hardy Spaces
2023
This paper is devoted to studying the behaviors of the fractional type Marcinkiewicz integrals
μ
Ω,
β
and the commutators
μ
Ω,
β
b
generated by
μ
Ω,
β
with
b
∈
L
loc
(ℝ
n
) on weighted Hardy spaces. Under the assumption of that the homogeneous kernel Ω satisfies certain regularities, the authors obtain the boundedness of
μ
Ω,
β
from the weighted Hardy spaces
H
ωp
p
(ℝ
n
) to the weighted Lebesgue spaces
L
ωq
q
(ℝ
n
) for
n/
(
n
+
β
) ≤
p
≤ 1 with 1/
q
= 1/
p
−
β
/
n
, as well as the same (
H
ωp
p
,
L
ωq
q
)-boudedness of
μ
Ω,
β
b
when
b
belongs to
ℬ
ℳ
O
ω
p
,
p
(
ℝ
n
)
, which is a non-trivial subspace of BMO(ℝ
n
).
Journal Article
KNN Data Filling Algorithm for Incomplete Interval-Valued Fuzzy Soft Sets
by
Wang, Peng
,
Ma, Xiuqin
,
Qin, Hongwu
in
Artificial Intelligence
,
Combining rule
,
Computational Intelligence
2023
As a generalization of the fuzzy soft set, interval-valued fuzzy soft set is viewed as a more resilient and powerful tool for dealing with uncertain information. However, the lower or upper membership degree, or both of them, may be missed during the data collection and transmission procedure, which could present challenges for data processing. The existing data filling algorithm for the incomplete interval-valued fuzzy soft sets has low accuracy and the high error rate which leads to wrong filling results and involves subjectivity due to setting the threshold. Therefore, to solve these problems, we propose a KNN data filling algorithm for the incomplete interval-valued fuzzy soft sets. An attribute-based combining rule is first designed to determine whether the data involving incomplete membership degree should be ignored or filled which avoids subjectivity. The incomplete data will be filled according to their
K
complete nearest neighbors. To verify the validity and feasibility of the method, we conduct the randomized experiments on the real dataset as Shanghai Five-Four Hotel Data set and simulated datasets. The experimental results illustrate that our proposed method outperform the existing method on the average accuracy rate and error rate.
Journal Article
A lightweight threshold signature scheme for internet of things devices
2026
In resource-constrained Internet of Things (IoT) environments, threshold-based digital signatures have become a key technology due to their decentralized security advantages. However, existing threshold signature schemes primarily face computational inefficiency and insufficient scalability in key management when deployed in IoT environments. To address these problems, this paper proposes a lightweight threshold signature scheme based on Random Grid Secret Sharing (RGSS), which effectively balances the trade-offs among security, efficiency, and scalability in IoT application environments. Specifically, we first design a lightweight signature framework for IoT environments. Second, we generate keys using a random grid-based secret sharing method and introduce random auxiliary values during the signature generation process to enhance the security and reliability of the signing process. Finally, we propose a signature aggregation technique based on XOR operations, combined with an efficient hash verification mechanism, to achieve rapid signature combination and verification, significantly improving signature aggregation efficiency. Experiments and analysis demonstrate that as the number of participants increases from 50 to 400, the computational overhead of our scheme increases only from 0.361 ms to 3.024 ms, while the resource overhead, particularly the memory size during the verification phase, is merely 0.58 KiB, outperforming existing schemes in both computational efficiency and resource overhead.
Journal Article
HLA-class II restricted TCR targeting human papillomavirus type 18 E7 induces solid tumor remission in mice
2024
T cell receptor (TCR)-engineered T cell therapy is a promising potential treatment for solid tumors, with preliminary efficacy demonstrated in clinical trials. However, obtaining clinically effective TCR molecules remains a major challenge. We have developed a strategy for cloning tumor-specific TCRs from long-term surviving patients who have responded to immunotherapy. Here, we report the identification of a TCR (10F04), which is human leukocyte antigen (HLA)-DRA/DRB1*09:01 restricted and human papillomavirus type 18 (HPV18) E7
84-98
specific, from a multiple antigens stimulating cellular therapy (MASCT) benefited metastatic cervical cancer patient. Upon transduction into human T cells, the 10F04 TCR demonstrated robust antitumor activity in both in vitro and in vivo models. Notably, the TCR effectively redirected both CD4
+
and CD8
+
T cells to specifically recognize tumor cells and induced multiple cytokine secretion along with durable antitumor activity and outstanding safety profiles. As a result, this TCR is currently being investigated in a phase I clinical trial for treating HPV18-positive cancers. This study provides an approach for developing safe and effective TCR-T therapies, while underscoring the potential of HLA class II-restricted TCR-T therapy as a cancer treatment.
The use of TCR engineered T cells holds promise for treatment of tumours, but is limited by awareness of clinically effective TCR molecules. Here the authors identify an MHC II restricted TCR that targets viral E7 of human papillomavirus type 18 and show effectivity in a murine model of solid tumour.
Journal Article
Increased expression of TAZ and associated upregulation of PD-L1 in cervical cancer
2021
Background
As an important component of the Hippo pathway, WW domain-containing transcription regulator 1 (TAZ), is a transcriptional coactivator that is responsible for the progression of various types of cancers. Programmed cell death protein 1 (PD-1) receptors in activated T cells and their ligand programming death force 1 (PD-L1) are the main checkpoint signals that control T cell activity. Studies have shown high levels of PD-L1 in various cancers and that PD-L1/PD-1 signals to evade T-cell immunity. Recent data have demonstrated that TAZ can regulate the characteristics of cancer cells via PD-L1. Cervical cancer is a common gynecological disease worldwide. In this study, we attempted to evaluate the effects of TAZ and PD-L1 on cervical cancer.
Methods
Hela cervical cancer cells were transfected with TAZ plasmid or TAZ siRNA or PD-L1 siRNA by using Lipofectamine 2000. The relationship between TAZ and PD-L1 in cervical cancer cells was determined by qRT-PCR and western blotting. The functional roles of TAZ were confirmed via CCK-8, Transwell and flow cytometry assays. Western blotting was utilized to observe the expression of BCL-2 and Caspase-3. The clinicopathological correlation of TAZ and PD-L1 was evaluated via relevant databases.
Result
TAZ is upregulated in cervical cancer and induces the growth and metastasis of cervical cancer cells by targeting PD-L1and inhibiting the ratio of apoptotic of cancer cells. High TAZ and PD-L1 expression was observed in different stage, grade, histological patterns, and ages of cervical cancer groups compared with normal cervix groups. Furthermore, high TAZ expression was positively correlated with the infiltration levels of immune cells and the expression of PD-L1.
Journal Article
CD11b regulates obesity-induced insulin resistance via limiting alternative activation and proliferation of adipose tissue macrophages
by
Zhang, Liying
,
Shou, Peishun
,
Yang, Qian
in
Adipose tissue
,
Adipose Tissue - metabolism
,
Animals
2015
Obesity-associated inflammation is accompanied by the accumulation of adipose tissue macrophages (ATMs), which is believed to predispose obese individuals to insulin resistance. CD11b (integrin αM) is highly expressed on monocytes and macrophages and is critical for their migration and function. We found here that high-fat diet–induced insulin resistance was significantly reduced in CD11b-deficient mice. Interestingly, the recruitment of monocytes to adipose tissue is impaired when CD11b is deficient, although the cellularity of ATMs in CD11b-deficient mice is higher than that in wild-type mice. We further found that the increase in ATMs is caused mainly by their vigorous proliferation in the absence of CD11b. Moreover, the proliferation and alternative activation of ATMs are regulated by the IL-4/STAT6 axis, which is inhibited by CD11b through the activity of phosphatase SHP-1. Thus, CD11b plays a critical role in obesity-induced insulin resistance by limiting the proliferation and alternative activation of ATMs.
Journal Article
XAV939 inhibits the proliferation and migration of lung adenocarcinoma A549 cells through the WNT pathway
by
Li, Chong
,
Lv, Yan
,
Zheng, Xu
in
Cancer therapies
,
Care and treatment
,
Development and progression
2018
The present study assessed the effects of the tankyrase (TNKS) small molecule inhibitor XAV939 on the proliferation and migration of lung adenocarcinoma A549 cells and the possible underlying mechanism. To do this, the association between TNKS and the WNT/β-catenin signaling pathway in lung acinar adenocarcinoma was investigated. Immunohistochemistry was performed, which demonstrated that TNKS, β-catenin and Myc proto-oncogene protein (c-Myc) proteins are positively expressed in lung adenocarcinoma tissue; this expression was significantly higher than that in normal adjacent non-carcinoma tissues. A549 cell proliferation was inhibited in all XAV939-intervention groups examined. In the wound-healing assay, cells treated with different concentrations of XAV939 exhibited a significantly increased scratch width compared with the control group. Reverse transcription-semi-quantitative polymerase chain reaction analysis revealed that β-catenin mRNA expression was significantly decreased in A549 cells in response to different XAV939 concentrations compared with the control group. Immunofluorescence revealed that β-catenin protein, initially localized in the nucleus/cytoplasm, gradually translocated to the cytoplasm/membrane, an effect that was associated with increased drug concentration. TNKS, β-catenin and c-Myc protein expression in A549 cells treated with XAV939 was reduced compared with that in untreated cells. Therefore, abnormally high TNKS expression may promote the occurrence of lung cancer. The TNKS inhibitor XAV939 inhibited lung adenocarcinoma A549 cell proliferation and migration in vitro. The underlying mechanism by which XAV939 exerted its inhibitory effects may be associated with attenuation of the WNT signaling pathway.
Journal Article
Forensic characterization and genetic polymorphisms of 19 X-chromosomal STRs in 1344 Han Chinese individuals and comprehensive population relationship analyses among 20 Chinese groups
by
Yu, Jian
,
Zou, Xing
,
Bai, Huiru
in
Analysis
,
Biology and Life Sciences
,
Ecology and Environmental Sciences
2018
X-chromosomal short tandem repeats (X-STRs) may assist resolution of complex forensic kinship cases and complement autosomal and Y-chromosomal STRs in routine forensic practice and population genetics. In the present study, we investigated the allele/haplotype diversity and forensic genetic characteristics of 19 X- STRs in 206 Guizhou Han and 1344 Meta-Han Chinese individuals using AGCU X19 PCR amplification system. Population relationships within five Han Chinese population groups (1344 individuals), between Guizhou Han and other 19 Chinese reference populations belonging to four language families (5074 individuals), as well as between Meta-Han Chinese and other 15 minorities (3730 individuals) were performed using Reynolds's, Nei's and Fst genetic distances, principal component analysis (PCA), multidimensional scaling (MDS), Structure and Neighbor-Joining tree. Mean paternity exclusion chance (MEC) in Duos > 0.99999999453588 and in trios > 0.99999999999781, as well as power of discrimination (PD) > 0.99999999999980 in Guizhou Han on the basis of allele frequencies. Consistent high MECs and PDs can be observed in Meta-Han Chinese population based on both allele diversities of 19 markers and haplotype diversities of seven linkage groups (LG). DXS10135 and LG1 are the most informative and polymorphic in Han Chinese group. The comprehensive population comparisons reveal that Han Chinese is a homogenous population and has the genetically closer relationship with Hmong-Mien-speaking groups than Tibetan-Burman-speaking and Turkic-speaking populations. In summary, AGCU X19 PCR amplification system is highly polymorphic and informative in Guizhou Han and Han Chinese populations. The comprehensive population data from 20 Chinese populations analyzed in this study may be used as a reference Chinese frequency database of X-STRs for forensic casework applications.
Journal Article
Delineation of the “Oropharyngeal Mucosa” and Limiting its Dose in Head and Neck Cancer Patients Spares the Oropharynx Without Compromising Target Coverage
2024
Objectives
Radiation-induced oropharyngeal injury is a dose-limiting toxicity in head and neck cancer patients. Delineation of the “oropharyngeal mucosa” and limiting its dose to spare the oropharynx was investigated.
Methods
In this retrospective study, computed tomography imaging from eight patients with previously untreated head and neck cancer was employed. An adaptive contouring brush within the planning software Monaco was used to create an air cavity within the oropharynx, and then the air cavity was expanded uniformly 2 mm to create the “oropharyngeal mucosa”. Three plans were independently generated for each patient: Plan1: dose constraint was applied for the oropharynx; Plan2: dose constraints were applied for the oropharynx and the “oropharyngeal mucosa”; Plan3: dose constraint was applied for the “oropharyngeal mucosa”. T-tests were used to compare the dosimetry variables.
Results
All plans had adequate target coverage and there were no statistical differences among plans. The mean dose, D30%, D45%, D50%, D85%, D90%, D95%, D100%, V25 Gy, V30 Gy, V35 Gy, V40 Gy, and V45 Gy of the oropharynx and “oropharyngeal mucosa” in Plan1 were significantly higher than those in Plan2 and Plan3. There were no significant differences between Plan2 and Plan3. There were no significant differences in the dosimetric parameters of any other organs at risk.
Conclusion
Delineation of the “oropharyngeal mucosa” and limiting its dose should be an easy and effective method to spare the oropharynx.
Plain language summary
Radiation-induced oropharyngeal injury is dose-limiting toxicity in head and neck cancer patients. Delineation of “oropharyngeal mucosa” and limiting its dose should be an easy and effective method to spare the oropharynx.
Journal Article