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Experimental Cell Research

Yang Cao, Yan Lei, Yang Luo, Tan Tan, Baochen Du, Yanbo Zheng, Le Sun, Qianjin Liang
When a cell migrates, the centrosome positions between the nucleus and the leading edge of migration via the microtubule system. The protein CrpF46 (centrosome-related protein F46) has a known role during mitosis and centrosome duplication. However, how CrpF46 efficiently regulates centrosome-related cell migration is unclear. Here, we report that knockdown of CrpF46 resulted in the disruption of microtubule arrangement, with impaired centrosomal reorientation, and slowed down cell migration. In cells that express low levels of CrpF46 , stress fibers were weakened, which could be rescued by recovering Flag-CrpF46 ...
October 15, 2018: Experimental Cell Research
Xiaoyun Zhang, Tong Jin, Xiaoxi Huang, Xinjuan Liu, Zheng Liu, Yanjun Jia, Jianyu Hao
Pancreatic stellate cells (PSCs), when activated, are characterized by proliferation and collagen synthesis, and contribute to extracellular matrix deposition in pancreatic fibrosis. Concomitantly, fibrosis is linked with the loss of PTEN (phosphatase and tensin homolog) protein in several organs. This study investigated the association between PTEN protein levels and the activated or apoptotic status of PSCs in a rat model of chronic pancreatitis. In addition, the activation status and biological behaviors of culture-activated PSCs were analyzed after lentiviral transfection with wildtype or mutant (G129E) PTEN for upregulation, or PTEN short hairpin RNA for downregulation, of PTEN...
October 12, 2018: Experimental Cell Research
Zhaoting Yang, Chengye Zhang, Wenbo Qi, Yanhua Xuan, Yan Cui
The role of Hedgehog (HH)/ glioma-associated oncogene homolog 1 (GLI1) pathway has been implicated in a variety of cancer entities, and the targeted pathway inhibition mediated by GLI1 is of therapeutic relevance. However, its oncogenicity and cross-talks with other cancer pathways including PI3K/Akt/NFκB, which modulates the HH/GLI1 signal strength, have rarely been explored in colorectal adenocarcinoma. We assessed the expression of GLI1 and its relationship with other cancer stemness genes, cell cycle markers, epithelial-mesenchymal transition (EMT), PI3K/Akt/NFκB signaling pathway genes, and HIF1α in 100 paraffin-embedded colorectal adenocarcinoma tissue samples using immunohistochemistry...
October 12, 2018: Experimental Cell Research
Rui Wang, Chenguang Zhao, Jianjun Li, Yuhuan Li, Ying Liu, Hui Dong, Dong Wang, Bo Zhao, Xin Zhang, Shuang Wang, Feng Cui, Haopeng Li, Xijing He, Jie Qin
Neural stem and progenitor cells (NSPCs) are important for nerve regeneration after spinal cord injury (SCI). Their proliferation, however, is limited. In this study, we investigated the role of Notch1 signaling in NSPC proliferation using adult mouse spinal cord derived NSPCs. We observed that Notch1 promoted proliferation of NSPCs and that Notch1 overexpression led to an expansion of cells in the S-phase and increased cyclin D1 expression. When investigating the functional relationship between Notch1, p-p38 and Pax6, we found that Notch1 suppressed p-p38 while promoting Pax6 expression...
October 9, 2018: Experimental Cell Research
Xiaoyang Wang, Guangjie Wang, Xiaoxue Zhang, Yanna Dou, Yijun Dong, Dong Liu, Jing Xiao, Zhanzheng Zhao
MiR-182-5p suppresses expression of Foxo1 that is a protective factor in renal disorders and is up-regulated in systemic lupus erythematosus patients. Thus, we hypothesized that dys-function of miR-182-5p/Foxo1 axis contributed to development of lupus nephritis (LN). Firstly, we investigated the expressions of miR-182-5p and Foxo1 in LN patients and during growth of LN MRL/lpr mice. Then we subjected MRL/lpr mice to the injection of miR-182-5p antagomirs and assessed the effect of miR-182-5p inhibition on renal structure and function...
October 8, 2018: Experimental Cell Research
Mohammed Benkheil, Matthias Van Haele, Tania Roskams, Manon Laporte, Sam Noppen, Kayvan Abbasi, Leen Delang, Johan Neyts, Sandra Liekens
The CCL20/CCR6 chemokine/receptor axis has previously been shown to contribute to the initiation and progression of hepatocellular carcinoma (HCC) through the recruitment of CCR6-positive leukocytes to the tumor microenvironment. In particular, high serum levels of CCL20 are reported in patients with HCC induced by the hepatitis C virus (HCV). A potential non-immune role for the CCL20/CCR6 axis in HCC development has not yet been investigated. Microarray analysis (Benkheil et al., paper submitted for publication), revealed that CCL20 is highly upregulated in hepatoma cells infected with HCV compared with non-infected hepatoma cells...
October 2, 2018: Experimental Cell Research
Xiaoran Yu, Jingjing Quan, Weilin Long, Huimin Chen, Ruoxun Wang, Jiaxin Guo, Xiaoxuan Lin, Sui Mai
Oral diseases, such as periapical periodontitis and periodontitis, are characterized by inflammation-induced bone loss. LL-37, a human antimicrobial peptide (AMP), has multiple biological functions and the potential to promote osteogenesis. Therefore, this study aimed to investigate the regulatory effects of LL-37 within normal and inflammatory microenvironments. The roles of P2X7 receptor (P2X7R) and mitogen-activated protein kinase (MAPK) signaling pathway were also demonstrated. The results showed that LL-37 promoted bone marrow stromal cell (BMSC) proliferation, migration and osteogenic differentiation...
October 1, 2018: Experimental Cell Research
Yusuke Tanaka, Miki Yamaguchi, Sachie Hirai, Toshiyuki Sumi, Makoto Tada, Atsushi Saito, Hirofumi Chiba, Takashi Kojima, Atsushi Watanabe, Hiroki Takahashi, Yuji Sakuma
Distal airway stem cells (DASCs) in the mouse lung can differentiate into bronchioles and alveoli. However, it remains unclear whether the same stem cells exist in the human lung. Here, we found that human lung epithelial (HuL) cells, derived from normal, peripheral lung tissue, in monolayer, mostly express both the N-terminally truncated isoform of p63 (∆Np63), a marker for airway basal cells, and thyroid transcription factor-1 (TTF-1), a marker for alveolar epithelial cells, even though these two molecules are usually expressed in a mutually exclusive way...
September 27, 2018: Experimental Cell Research
Huimin Chen, Shuyu Guo, Yang Xia, Lichan Yuan, Mengting Lu, Meng Zhou, Mengru Fang, Li Meng, Zhongdang Xiao, Junqing Ma
Trio, the Rho guanine nucleotide exchange factor (Rho-GEF), plays diverse roles in cell migration, cell axon guidance and cytoskeleton reorganization. Conserved during evolution, Trio encodes two guanine nucleotide exchange factor domains (GEFs) and activates small GTPases. The Rho-family small GTPases RhoA and Rac1, which are target molecules of Trio, have been described to engage in craniofacial development and tooth formation. However, the exact role of Trio in tooth development remains elusive. In this study, we generated Wnt1-cre;Triofl/fl mice to address the potential function of Trio in tooth development...
September 27, 2018: Experimental Cell Research
Marta Ordoñez, Natalia Presa, Asier Dominguez-Herrera, Miguel Trueba, Antonio Gomez-Muñoz
We showed previously that ceramide kinase (CerK) expression increases during adipogenesis pointing to a relevant role of intracellular C1P in this process. In the present work we demonstrate that administration of exogenous C1P inhibits the differentiation of 3T3-L1 pre-adipocytes into mature adipocytes through a mechanism involving activation of extracellularly regulated kinases (ERK) 1-2. Exogenous C1P reduced the accumulation of lipid droplets and the content of triacylglycerol in these cells, and potently inhibited the expression of the early and late adipogenic markers C/EBPβ and PPARγ, respectively...
September 27, 2018: Experimental Cell Research
Zhengshuai Song, Qi Cao, Hailong Ruan, Hongmei Yang, Keshan Wang, Lin Bao, Gong Cheng, Tianbo Xu, Haibing Xiao, Cheng Wang, Di Liu, Ke Chen, Xiaoping Zhang
Clear cell renal cell carcinoma (ccRCC) is one of the most common malignant tumors in the urinary system, and its incidence continues to increase. Regulator of calcineurin 1 (RCAN1), one of the genes on chromosome 21, is a crucial mediator of tumor inhibition. RCAN1.4 is best characterized as an endogenous inhibitor of the phosphatase calcineurin, and it has been observed to be downregulated in numerous types of cancer. However, its essential function remains unclear in ccRCC. In the present study, we found that RCAN1...
September 27, 2018: Experimental Cell Research
Wanlada Sawangarun, Masita Mandasari, Junko Aida, Kei-Ichi Morita, Kou Kayamori, Tohru Ikeda, Kei Sakamoto
Notch signaling functions in diverse developmental and homeostatic processes, including stem cell self-renewal and cell fate determination. Notch1-inactivating mutations are frequently detected in skin and oro-esophageal cancers, suggesting a role for Notch1 as a tumor suppressor. Here, we clarify the contribution of Notch1 deficiency to oro-esophageal tumorigenesis using a physiological experimental model. Tongue and esophageal tumors induced in mice by 4-nitroquinoline-1-oxide (4-NQO) showed pathophysiological similarities to human tumors, including decreased Notch1 expression in the basal cells...
September 25, 2018: Experimental Cell Research
Klaus Scherrer
The main purpose of this review is to recall for investigators - and in particular students -, some of the early data and concepts in molecular genetics and biology that are rarely cited in the current literature and are thus invariably overlooked. There is a growing tendency among editors and reviewers to consider that only data produced in the last 10-20 years or so are pertinent. However this is not the case. In exact science, sound data and lucid interpretation never become obsolete, and even if forgotten, will resurface sooner or later...
September 25, 2018: Experimental Cell Research
Jiajie Tu, Pengying Zhang, Alfred Chun Shui Luk, Jason Jinyue Liao, Wai-Yee Chan, Albert Cheung Hoi-Hung, Tin-Lap Lee
During spermatogenesis, a group of undifferentiated spermatogonia undergoes an essential transition to a differentiating stage, which involves gain of Kit receptor. In the current study, we showed that a small non-coding RNA, miRNA-26b could induce transition from Kit- to Kit+ and inhibit proliferation of spermatogonia. A key transcriptional factor for undifferentiated spermatogonia, Plzf, was proven as a direct target of miR-26b. When undifferentiated spermatogonia were treated with Retinoic acid (RA), miR-26b was increased, further promoting RA-induced differentiation of spermatogonia...
September 25, 2018: Experimental Cell Research
Oskar Staufer, Jochen E Hernandez B, Amin Rustom
Cell biology considers most animal tissues as assemblies of "individual" cells that rely on different contact-dependent communication mechanisms, including synapses, gap junctions or - a recent awareness - membrane nano- and microtubes. However, by protease-mediated singularization of dense 2D/ 3D cell cultures and tissue explants, we show here that cell collectives stay connected via a continuous meshwork of F-actin-based membrane tubes, resembling tunneling nanotube (TNT)-based networks observed between dispersed cell cultures...
September 21, 2018: Experimental Cell Research
Miquéias Lopes-Pacheco, Jamil Z Kitoko, Marcelo M Morales, Hilda Petrs-Silva, Patricia R M Rocco
Recombinant adeno-associated virus (rAAV) vector platforms have shown considerable therapeutic success in gene therapy for inherited disorders. In cystic fibrosis (CF), administration of first-generation rAAV2 was safe, but clinical benefits were not clearly demonstrated. Therefore, next-generation vectors that overcome rate-limiting steps in rAAV transduction are needed to obtain successful gene therapy for this devastating disease. In this study, we evaluated the effects of single-strand or self-complementary (sc) rAAV vectors containing single or multiple tyrosine-to-phenylalanine (Y-F) mutations in capsid surface-exposed residues on serotypes 2, 8 or 9...
September 20, 2018: Experimental Cell Research
Yuanlin Gao, Jie Zhong, Lei Jiang
The Raf kinase inhibitor protein (RKIP), belonging to a member of the phosphatidylethanolamine-binding protein (PEBP) family, is involved in regulating neural development. However, the role of RKIP in microglial cells stimulated with 1-methyl-4-phenylpyridinium (MPP+ ) has not been determined. Thus, in the present study, we investigated the role of RKIP and its underlying mechanism in Parkinson's disease (PD). Our results showed that the expression of RKIP was significantly reduced in BV-2 cells treated with MPP+ ...
September 20, 2018: Experimental Cell Research
Wei Zhang, Huan Feng, Qichao Chen, Xiaozhe Lu, Jingping Ge
For reasons not completely clear, natural killer (NK) cells from tumor patients displayed multiple exhaustion features and could not be completely restored even when the inhibitory signals from the intratumoral environment had ceased to exist. Here, we found that the circulating NK cells from bladder cancer patients presented significantly reduced cytotoxicity than the circulating NK cells from healthy volunteers. This impairment in cytotoxicity resulted in part from an overrepresentation of Tim-3+ NK cells in bladder cancer patients...
September 20, 2018: Experimental Cell Research
Jie Liu, Xiaowei Guo, Xi Ren, Hao Tian, Yi Liang, Zhenghui Luo, Weiyi Wang, Yuan Wang, Dongxia Zhang, Yuesheng Huang, Jiaping Zhang
Although parallel alignment of fibroblasts to the tension lines of scar has been evidenced in vivo, how scar contracture generates directional contraction remains largely unclear due to the lack of effective in vitro model. Fibroblast populated collagen lattice (FPCL), a widely used in vitro model, fails to mimic scar contracture since it produces concentric contraction with the random orientation of fibroblast. We hypothesized that a novel FPCL model with fibroblast alignment might produce directional contraction and then simulate scar contracture better...
September 7, 2018: Experimental Cell Research
Fan Chen, Xiao-Fei Jiao, Jia-Yu Zhang, Di Wu, Zhi-Ming Ding, Yong-Sheng Wang, Yi-Liang Miao, Li-Jun Huo
Nucleoporins (Nups) are a large and diverse family of proteins that mediate nucleocytoplasmic transport at interphase of vertebrate cells. Nups also function in mitosis progression. However, whether Nups are involved in oocyte meiosis progression is still rarely known. In this study, we delineated the roles and regulatory mechanisms of Nucleoporin35 (Nup35) during oocyte meiotic maturation. The immunofluorescent signal of Nup35 was localized in the nuclear membrane at germinal vesicle (GV) stage, the microtubules and spindle at pro-metaphase I (pro-MI), metaphase I (MI), and metaphase II (MII), but to the spindle poles at anaphase I (AI) and telophase I (TI)...
September 5, 2018: Experimental Cell Research
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