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International Journal of Biological Sciences

Tao Wang, Jiao Zhang, Min Hu, Yuehui Zhang, Peng Cui, Xin Li, Juan Li, Edvin Vestin, Mats Brännström, Linus R Shao, Håkan Billig
The underlying mechanisms of polycystic ovarian syndrome (PCOS)-induced endometrial dysfunction are not fully understood, and although accumulating evidence shows that the use of metformin has beneficial effects in PCOS patients, the precise regulatory mechanisms of metformin on endometrial function under PCOS conditions have only been partially explored. To address these clinical challenges, this study aimed to assess the protein expression patterns of glycolytic enzymes, estrogen receptor (ER), and androgen receptor (AR) along with differences in mitochondria-dependent apoptosis in PCOS patients with and without endometrial hyperplasia in vivo and to investigate the effects of metformin in PCOS patients with endometrial hyperplasia in vitro ...
2019: International Journal of Biological Sciences
Yanqin Fan, Qian Yang, Yingjie Yang, Zhao Gao, Yiqiong Ma, Lu Zhang, Wei Liang, Guohua Ding
Previous studies have shown that mitochondrial dysfunction plays an important role in high- glucose(HG)-induced podocyte injury and thus contributes to the progression of diabetic nephropathy(DN). The histone deacetylase Sirtuin6 (Sirt6) has been revealed to have an essential role in the regulation of mitochondrial function in skeletal muscle and cardiomyocytes. However, its specific role in mitochondrial homeostasis in podocytes is undetermined. Here, we aimeds to explore the physiological function of Sirt6 in podocyte mitochondria and apoptosis under HG conditions and explore the possible mechanism...
2019: International Journal of Biological Sciences
Yuyou Deng, Ran Bi, Haoran Guo, Jiaxin Yang, Yujun Du, Chunxi Wang, Wei Wei
Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) is an effective chemotherapeutic agent that specifically impairs cancer cells while sparing normal cells; however, some cancer cells develop resistance to TRAIL. Here, we identified Andrographolide, a diterpenoid lactone derived from a traditional herbal medicine Andrographis paniculata , as an ideal sensitizer for TRAIL to overcome bladder cancer. Our results showed that combination treatment of Andro and TRAIL retarded growth, attenuated proliferation, decreased colony formation, inhibited migration and promoted caspases-mediated apoptosis in T24 cells...
2019: International Journal of Biological Sciences
Yanhan Dong, Wenhua Xu, Cuiyun Liu, Peijun Liu, Peifeng Li, Kun Wang
Reactive oxygen species (ROS) are a class of reactive molecules that have been implicated in a variety of cardiovascular diseases, accompanied by disorder of multiple signaling events. As cardiomyocytes maintain abundant of mitochondria, which supply the major source of endogenous ROS, oxidative damage to mitochondria often drives apoptotic cell death and initiates cardiac pathology. In recent years, non-coding RNAs (ncRNAs) have received much attention to uncover their roles in regulating gene expression during those pathological events in the heart, such as myocardial infarction, cardiac hypertrophy, and heart failure...
2019: International Journal of Biological Sciences
Zhuoying Wang, Chongren Wang, Dongqing Zuo, Tao Zhang, Fei Yin, Zifei Zhou, Hongsheng Wang, Jing Xu, Min Mao, Gangyang Wang, Yingqi Hua, Wei Sun, Zhengdong Cai
Osteosarcoma (OS) is the most common primary bone malignancy in adolescents. One major obstacle for current OS treatment is drug-resistance. Raddeanin A (RA), an oleanane-type triterpenoid saponin, exerts anti-tumor effects in several tumor models, but the effect of RA in human drug-resistant OS remained to be elucidated. In the present study, we investigated the anti-tumor effects of RA in both drug-sensitive and drug-resistant OS cells and its underlying mechanism. RA inhibited cell proliferation and colony formation and induced apoptotic cell death in a dose-dependent manner in both drug-sensitive and drug-resistant cells...
2019: International Journal of Biological Sciences
Kyoungmi Min, Suk Kyeong Lee
In Epstein-Barr virus (EBV)-infected epithelial cancers, Bam HI A rightward transcript (BART) miRNAs are highly expressed. However, only a few target genes of BART miRNAs have been investigated. Our mRNA microarray data showed that DKK1 was markedly down-regulated in EBV-associated gastric carcinoma (EBVaGC) cells. Using luciferase reporter assay we tested whether miR-BART10-3p regulates DKK1 by directly targeting the 3'-UTR of DKK1 mRNA. We observed that miR-BART10-3p transfection decreased DKK1 expression, while an LNA inhibitor of miR-BART10-3p (LNA-miR-BART10-3p(i)) increased DKK1 expression...
2019: International Journal of Biological Sciences
Feng Guo, Jinjin Liu, Xiao Han, Xuping Zhang, Tian Lin, You Wang, Jin Bai, Junqing Han
F-box only protein 22 (FBXO22), a substrate receptor of the SKP1-Cullin 1-F-box protein (SCF) E3 ubiquitin ligase that targets key regulators of cellular activities for ubiquitylation and degradation, plays important roles in the progression of human cancer. However, little is known about the role of FBXO22 in renal cell carcinoma (RCC). This study aims to explore the biological function of FBXO22 in RCC progression and its specific regulation mechanism. We performed immunohistochemistry analysis and found that the expression level of FBXO22 was significantly lower in RCC tissues than in normal renal tissues...
2019: International Journal of Biological Sciences
Furao Liu, Zebin Xia, Meichao Zhang, Jiping Ding, Yang Feng, Jianwei Wu, Yun Dong, Wei Gao, Zengwei Han, Yuanhua Liu, Yuan Yao, Dong Li
Pancreatic cancer (PC) is one of the most lethal diseases, characterized by early metastasis and high mortality. Subunits of the SWI/SNF complex have been identified in many studies as the regulators of tumor progression, but the role of SMARCAD1, one member of the SWI/SNF family, in pancreatic cancer has not been elucidated. Based on analysis of GEO database and immunohistochemical detection of patient-derived pancreatic cancer tissues, we found that SMARCAD1 is more highly expressed in pancreatic cancer tissues and that its expression level negatively correlates with patients' survival time...
2019: International Journal of Biological Sciences
Guiyang Wu, Shichao Yuan, Zaiping Chen, Guoping Chen, Qinghao Fan, Hao Dong, Fubo Ye, Jing Li, Xiongwen Zhu
The Krüppel-like transcription factor 14 (KLF14) is a critical regulator of a wide array of biological processes. However, the role of KLF14 in colorectal cancer (CRC) isn't fully investigated. This study aimed to explore the clinicopathological significance and potential role of KLF14 in the carcinogenesis and progression of CRC. A tissue microarray consisting of 185 samples from stage I-III CRC patients was adopted to analyze the correlation between KLF14 expression and clinicopathological parameters, as well as overall survival (OS) and disease-free survival (DFS)...
2019: International Journal of Biological Sciences
Meihan Liu, Zhuo Zhang, Hui Wang, Xiaoliang Chen, Chunxiang Jin
Metformin, a common therapeutics for type 2 diabetics, was recently demonstrated to possess antitumor activity in various cancer types. However, its therapy effect in renal cell carcinoma (RCC) still remains controversial. In this study, we found that metformin treatment in RCC cells lead to activation of AMPK, which suppressed the cell proliferation under normal condition, but enhanced cell proliferation under glucose deprivation (GD) condition. Depletion of AMPK by siRNA abolished the proliferation effect of MF under GD condition...
2019: International Journal of Biological Sciences
Rosa Divella, Antonio Mazzocca, Antonella Daniele, Carlo Sabbà, Angelo Paradiso
Western populations are becoming increasingly sedentary and the incidence of nonalcoholic fatty liver disease (NAFLD) is increasing and becoming one of the most common causes of liver disease worldwide. Also, NAFLD is considered one the new emerging risk factors for development of tumors of the gastro-intestinal tract, particularly hepatocellular carcinoma (HCC). Visceral obesity is an important risk factor for the onset of NAFLD. An accumulation of ectopic fat, including visceral obesity and fatty liver leads to a dysfunction of the adipose tissue with impaired production of adipocytokines which, in turn, favor an increase in pro-inflammatory cytokines...
2019: International Journal of Biological Sciences
Deng-Pan Wu, Li-Ru Bai, Yan-Fang Lv, Yan Zhou, Chun-Hui Ding, Si-Man Yang, Fan Zhang, Jin-Lan Huang
In spite of initially promising responses, 5-year recurrence after photodynamic therapy (PDT) sustains high level and an increase in PDT effectiveness is needed. It has been demonstrated that gap junctional intercellular communication (GJIC) formed by Connexin (Cx)43 could improve the transfer of "death signal" between cells, thereby causing the enhancement of cytotoxicity of chemotherapeutics and suicide gene therapy. Nevertheless, whether Cx43-composed GJIC has an effect on PDT phototoxicity remains unknown...
2019: International Journal of Biological Sciences
Baoan Hong, Jingcheng Zhou, Kaifang Ma, Jiufeng Zhang, Haibiao Xie, Kenan Zhang, Lei Li, Lin Cai, Ning Zhang, Zhongyuan Zhang, Kan Gong
Tribbles pseudokinase 3 (TRIB3) is a member of the mammalian pseudokinase tribbles family and is involved in multiple biological processes. However, the role of TRIB3 in renal cell carcinoma (RCC) remains unclear. In this study, we aimed to elucidate the biological functions of TRIB3 in RCC and explore its underlying mechanisms. TRIB3 expression and its correlation with clinicopathological features was evaluated in 123 patients with RCC. A series of cytological experiments were performed to clarify the biological functions of TRIB3, and potential molecular regulatory mechanisms were explored using transcriptome sequencing...
2019: International Journal of Biological Sciences
Yanhui Liu, Pingchong Lei, Hong Qiao, Kai Sun, Xiling Lu, Fengchang Bao, Runhong Yu, Cheng Lian, Yao Li, Wei Chen, Fei Xue
Daunorubicin (Dnr) is at the forefront of acute myeloid leukemia (AML) therapy, but drug resistance poses a major threat to treatment success. MicroRNA (miR)-9 has been shown to have a pivotal role in AML development. However, little is known about the role of miR-9 in Dnr resistance in AML. We explored the potential role of miR-9 in Dnr resistance in AML cells and its mechanism of action. AML cell lines with high half-maximal inhibitory concentration to Dnr in vivo had significantly low miR-9 expression. miR-9 overexpresssion sensitized AML cells to Dnr, inhibited cell proliferation, and enhanced the ability of Dnr to induce apoptosis; miR-9 knockdown had the opposite effects...
2019: International Journal of Biological Sciences
Yang Yang, He-Xiao Wang, Lan Zhang, Wei Huo, Xiao-Dong Li, Rui-Qun Qi, Xiao-Yu Song, Shi Wei, Xing-Hua Gao, Shuai Han, Liu Cao
Hyperthermia has been clinically utilized as an adjuvant therapy in the treatment of cervical carcinoma. However, thermotolerance induced by heme oxygenase-1 (HO-1), a stress-inducible cytoprotective protein, limits the efficacy of hyperthermic therapy, for which the exact mechanism remains unknown. In the present study, we found that heat treatment induced HO-1 expression and decreased copy number of HPV16 in cervical cancer cells and tissues from cervical cancer and precursor lesions. Knockdown of HO-1 stimulated autophagy accompanied by downregulation of X-linked inhibitor of apoptosis protein...
2019: International Journal of Biological Sciences
Xin Zhang, Jin-Xiu Zhu, Zhen-Guo Ma, Hai-Ming Wu, Si-Chi Xu, Peng Song, Chun-Yan Kong, Yu-Pei Yuan, Wei Deng, Qi-Zhu Tang
Cardiomyocyte apoptosis is a key event in the process of doxorubicin (DOX)-induced cardiotoxicity. Our previous study found that rosmarinic acid (RA) could attenuate pressure overload-induced cardiac dysfunction via cardiac fibroblasts (CFs), however its effect in DOX-induced cardiotoxicity remains unknown. In the present study, mice were subjected to a single intraperitoneal injection of DOX (15mg/kg) to generate DOX-induced cardiotoxicity. Histological examination, echocardiography, and molecular markers were used to evaluate the effects of RA...
2019: International Journal of Biological Sciences
Sen Li, Jinlan Gao, Xinbin Zhuang, Chenyang Zhao, Xiaoyu Hou, Xuesha Xing, Chen Chen, Qi Liu, Shuang Liu, Yang Luo
Cyclin G2 has been identified as a tumour suppressor in several cancers. However, its regulatory roles and underlying mechanisms in tumours are still unknown. In this study, we demonstrated that cyclin G2 was expressed at low levels in glioma, which was as a poor prognostic factor for this disease. We also found that, cyclin G2 could suppress cell proliferation, initiate cell apoptosis and reduce aerobic glycolysis, suggesting that cyclin G2 plays a tumour suppressive role in glioma. Mechanistically, cyclin G2 could negatively regulate tyrosine-10 phosphorylation of a critical glycolytic enzyme, lactate dehydrogenase A, through direct interaction...
2019: International Journal of Biological Sciences
Hongzhi Sun, Bingya Yang, Hao Zhang, Jingwei Song, Yenan Zhang, Jicheng Xing, Zhihui Yang, Changyong Wei, Tuoye Xu, Zhennan Yu, Zhipeng Xu, Min Hou, Minjun Ji, Yansong Zhang
Glioma is one of the most common brain tumors, suggesting the importance of investigating the molecular mechanism of gliomas. We studied the roles of Ribonucleotide Reductase Regulatory Subunit M2 (RRM2) in glioma. Expressions of RRM2 are higher in glioma tissues evidenced by TCGA data, western blot and immunohistochemistry. RRM2 is negatively correlated with glioma patient's survival. RNA-seq showed that genes involved in apoptosis, proliferation, cell adhesion and negative regulation of signaling were up-regulated upon RNAi-mediated knock-down of RRM2...
2019: International Journal of Biological Sciences
Wenfei Ji, Yaqin Shi, Xin Wang, Weiwei He, Lin Tang, Shengwang Tian, Hua Jiang, Yongqian Shu, Xiaoxiang Guan
The dysregulation of cyclin D -Cyclin-dependent kinase 4/6 (CDK4/6)-Rb axis has been implicated in breast cancer progression and the selective CDK4/6 inhibitors have shown effective activity in advanced breast cancer, especially in tumors driven by the estrogen receptor (ER). However, resistance to these small molecular inhibitors has become an inevitable clinical issue after their initial use. Here, we investigated the potential mechanism of resistance by establishing a CDK4/6 inhibitor palbociclib-resistant breast cancer cell line (MCF-7pR)...
2019: International Journal of Biological Sciences
Hao Feng, Xin Zhao, Qiqiang Guo, Yanling Feng, Mengtao Ma, Wendong Guo, Xiang Dong, Chengsi Deng, Chunlu Li, Xiaoyu Song, Shuai Han, Liu Cao
Proliferative vitreoretinopathy (PVR) is the most serious fibrous complication that causes vision loss after intraocular surgery, and there is currently no effective treatment in clinical. Autophagy is an important cell biological mechanism in maintaining the homeostasis of tissues and cells, resisting the process of EMT. However, it is still unclear whether autophagy could resist intraocular fibrosis and prevent PVR progression. In this study, we investigated the expression of mesenchymal biomarkers in autophagy deficiency cells and found these proteins were increased...
2019: International Journal of Biological Sciences
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