scholarly journals An Aurora Kinase B–Based Mouse System to Efficiently Identify and Analyze Proliferating Cardiomyocytes

2020 ◽  
Vol 8 ◽  
Author(s):  
Wenbin Fu ◽  
Qiao Liao ◽  
Liangpeng Li ◽  
Yu Shi ◽  
Andi Zeng ◽  
...  
Keyword(s):  
Aurora Kinase ◽  
Aurora Kinase B ◽  
Mouse System

scholarly journals Inhibition of Aurora Kinase B activity disrupts development and differentiation of salivary glands

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Abeer K. Shaalan ◽  
Tathyane H. N. Teshima ◽  
Abigail S. Tucker ◽  
Gordon B. Proctor
Keyword(s):  
Cell Cycle ◽  
Embryonic Development ◽  
Salivary Glands ◽  
Aurora Kinase ◽  
Serine Threonine Kinase ◽  
Aurora Kinase B ◽  
Development And Differentiation ◽  
Differentiation Marker ◽  
Key Events

AbstractLittle is known about the key molecules that regulate cell division during organogenesis. Here we determine the role of the cell cycle promoter aurora kinase B (AURKB) during development, using embryonic salivary glands (E-SGs) as a model. AURKB is a serine/threonine kinase that regulates key events in mitosis, which makes it an attractive target for tailored anticancer therapy. Many reports have elaborated on the role of AURKB in neoplasia and cancer; however, no previous study has shown its role during organ development. Our previous experiments have highlighted the essential requirement for AURKB during adult exocrine regeneration. To investigate if AURKB is similarly required for progression during embryonic development, we pharmacologically inhibited AURKB in developing submandibular glands (SMGs) at embryonic day (E)13.5 and E16.5, using the highly potent and selective drug Barasertib. Inhibition of AURKB interfered with the expansion of the embryonic buds. Interestingly, this effect on SMG development was also seen when the mature explants (E16.5) were incubated for 24 h with another cell cycle inhibitor Aphidicolin. Barasertib prompted apoptosis, DNA damage and senescence, the markers of which (cleaved caspase 3, γH2AX, SA-βgal and p21, respectively), were predominantly seen in the developing buds. In addition to a reduction in cell cycling and proliferation of the epithelial cells in response to AURKB inhibition, Barasertib treatment led to an excessive generation of reactive oxygen species (ROS) that resulted in downregulation of the acinar differentiation marker Mist1. Importantly, inhibition of ROS was able to rescue this loss of identity, with Mist1 expression maintained despite loss of AURKB. Together, these data identify AURKB as a key molecule in supporting embryonic development and differentiation, while inhibiting senescence-inducing signals during organogenesis.

scholarly journals RNA-binding protein RNPC1 acts as an oncogene in gastric cancer by stabilizing Aurora kinase B mRNA

2021 ◽  
pp. 112741
Author(s):  
Chun-Mei Ji ◽  
Xu Zhang ◽  
Wentong Fang ◽  
Ling Meng ◽  
Xiaolong Wei ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Rna Binding ◽  
Binding Protein ◽  
Rna Binding Protein ◽  
Aurora Kinase ◽  
Aurora Kinase B

scholarly journals Aurora Kinase B Inhibition: A Potential Therapeutic Strategy for Cancer

Molecules ◽  
2021 ◽  
Vol 26 (7) ◽  
pp. 1981
Author(s):  
Naheed Arfin Borah ◽  
Mamatha M. Reddy
Keyword(s):  
Drug Resistance ◽  
Cell Cycle Progression ◽  
Therapeutic Strategy ◽  
Tumor Development ◽  
Aurora Kinase ◽  
Aurora Kinase B ◽  
Development Therapy ◽  
Chromosomal Passenger ◽  
Combination Studies ◽  
Related Drug

Aurora kinase B (AURKB) is a mitotic serine/threonine protein kinase that belongs to the aurora kinase family along with aurora kinase A (AURKA) and aurora kinase C (AURKC). AURKB is a member of the chromosomal passenger protein complex and plays a role in cell cycle progression. Deregulation of AURKB is observed in several tumors and its overexpression is frequently linked to tumor cell invasion, metastasis and drug resistance. AURKB has emerged as an attractive drug target leading to the development of small molecule inhibitors. This review summarizes recent findings pertaining to the role of AURKB in tumor development, therapy related drug resistance, and its inhibition as a potential therapeutic strategy for cancer. We discuss AURKB inhibitors that are in preclinical and clinical development and combination studies of AURKB inhibition with other therapeutic strategies.

Characterization of ScAP-23, a new cell line from murine subcutaneous adipose tissue, identifies genes for the molecular definition of preadipocytes

2007 ◽  
Vol 31 (2) ◽  
pp. 328-342 ◽  
Author(s):  
Ji Young Kim ◽  
Yu Wu ◽  
Cynthia M. Smas
Keyword(s):  
Adipose Tissue ◽  
Aurora Kinase ◽  
Dna Arrays ◽  
Aurora Kinase B ◽  
Chemokine Ligand ◽  
Embryonic Origin ◽  
Gene Expression Studies ◽  
Definition Of ◽  
Subcutaneous Adipose

The 3T3-L1 model of in vitro adipogenesis has provided key insights into the molecular nature of this process. However, given that 3T3-L1 are of an embryonic origin, it is not clear to what extent they represent adipogenesis as it occurs in white adipose tissue (WAT). With the goal of better defining preadipocytes and adipogenesis in WAT, we have generated a new cell culture model from adipocyte precursors present in C57BL/6 mouse subcutaneous WAT. ScAP-23 preadipocytes show fibroblastic morphology, and on treatment with dexamethasone, 3-methylisobutylxanthine, insulin, and indomethacin, convert to nearly 100% adipocyte morphology. ScAP-23 adipocytes contain abundant lipid droplets and express transcripts for PPARγ, C/EBP family, and SREBP-1c transcription factors, SCD1, aFABP, ATGL, GLUT4, FAS, LDL, and GPDH, and are insulin responsive. Differential screening of 1,176 genes using nylon DNA arrays identified 10 transcripts enriched in ScAP-23 adipocytes vs. preadipocytes and 26 transcripts enriched in ScAP-23 preadipocytes vs. adipocytes. Semiquantitative or real-time PCR analyses identified a common cohort of 14 transcripts markedly downregulated in both ScAP-23 and 3T3-L1 adipogenesis. These included catenin-β1, chemokine ligand-2, serine or cysteine peptidase inhibitor f1, aurora kinase B, thrombospondin2, and solute carrier-7a5. Five of these transcripts (Ccl2, Serpinf1, Aurkb, Thbs2, and Slc7a5) demonstrated at least a twofold increase in WAT from obese ( ob/ob) mice compared with that of wild-type mice. This suggests that comparative gene expression studies of ScAP-23 and 3T3-L1 adipogenesis may be particularly fruitful in identifying preadipocyte-expressed genes that play a role in adipose tissue physiology and/or pathophysiology.

scholarly journals Phosphorylation and Activation of Cell Division Cycle Associated 8 by Aurora Kinase B Plays a Significant Role in Human Lung Carcinogenesis

2007 ◽  
Vol 67 (9) ◽  
pp. 4113-4122 ◽  
Author(s):  
Satoshi Hayama ◽  
Yataro Daigo ◽  
Takumi Yamabuki ◽  
Daizaburo Hirata ◽  
Tatsuya Kato ◽  
...  
Keyword(s):  
Cell Division ◽  
Significant Role ◽  
Human Lung ◽  
Aurora Kinase ◽  
Cell Division Cycle ◽  
Lung Carcinogenesis ◽  
Aurora Kinase B

Elevated FoxM1 Expression Promotes Cell Cycle Progression by Induction of KIS Expression and Contributes to the Development of Leukemia Cells.

Blood ◽  
2007 ◽  
Vol 110 (11) ◽  
pp. 888-888 ◽  
Author(s):  
Okinaka Keiji ◽  
Satoki Nakamura ◽  
Isao Hirano ◽  
Takaaki Ono ◽  
Shinya Fujisawa ◽  
...  
Keyword(s):  
Cell Cycle ◽  
Cell Lines ◽  
Leukemia Cell ◽  
Aurora Kinase ◽  
Leukemia Cells ◽  
Clinical Samples ◽  
Acute Leukemias ◽  
Aurora Kinase B ◽  
Leukemia Cell Lines ◽  
Foxm1 Expression

Abstract [Background] FoxM1, a member of the Fox transcription factor family, plays an important cell cycle regulator of both the transition from G1 to S phase and progression to mitosis. FoxM1 expression was also found to be up-regulated in some solid tumors (basal cell carcinomas, hepatocellular carcinoma, and primary breast cancer). These results suggested that FoxM1 plays a role in the oncogenesis of malignancies. However, it is unknown whether FoxM1 expression contributes to the development or progression of leukemia cells. Therefore, we investigated how FoxM1 regulated the cell cycle of leukemia cells and the expression analysis of the FoxM1 gene in patients with acute leukemias. [Methods] The cells used in this study were human acute leukemia cell lines, U937 and YRK2 cells. Primary acute myeloblastic (25 AML (4 M1, 11 M2, 6 M4, 4 M5)) cells were obtained from the peripheral blood. Human normal mononuclear cells (MNCs) were isolated from peripheral blood (PB) of healthy volunteers after obtaining informed consents. For analysis of proliferation and mitotic regulatory proteins (p27, p21, Skp2, Cdc25B, Cyclin D1, Survivin, Aurora kinase B, and KIS) in leukemia cells, MTT assays and western blot were performed in all cell lines, which untransfected or transfected with siRNA FoxM1, respectively. For cell cycle analysis, flow cytometory analysis was performed in leukemia cells untransfected or transfected with siRNAFoxM1 by PI staining. For analysis of FoxM1 mRNA, quantitative RT-PCR was performed in all cell lines and clinical samples. [Results] In all leukemia cell lines, the expression of FoxM1B mRNA were significantly higher than normal MNCs. When transfected with the siRNA FoxM1 in leukemia cells, suppression of FoxM1 caused a mean 71% (range 62 to 80%) reduction in S phase cells and a mean 4.4-fold (range 3.2 to 5.6-fold) increase in G2/M phase cells compared to controls. MTT assay demonstrated that the proliferation of the siRNA FoxM1 transfected cells was inhibited compared to the untransfected cells. Moreover, FoxM1 knockdown by siRNA in leukemia cells reduced protein and mRNA expression of Aurora kinase B, Survivin, Cyclin D1, Skp2 and Cdc25B, while increased protein expression of p21and p27. In the clinical samples obtained from patients with acute leukemias, the FoxM1B gene was overexpressed in 22/25 (88%). The relative folds of FoxM1B gene expression were for AML: 2.83 compared to normal MNCs. [Conclusions] In this study, we report in the first time that FoxM1 is overexpressed in myeloid leukemia cells. These results demonstrated that expression of FoxM1 is an essential transcription factor for growth of leukemia cells, and regulate expression of the mitotic regulators. Moreover, we showed that FoxM1 induced the expression of KIS protein. Therefore, FoxM1 might be one of moleculer targets of therapy for acute leukemias.

The Aurora-Kinase Inhibitor R763/AS703569 Exerts Major Growth-Inhibitory and Apoptosis-Inducing Effects on Neoplastic Mast Cells

Blood ◽  
2010 ◽  
Vol 116 (21) ◽  
pp. 3972-3972 ◽  
Author(s):  
Barbara Peter ◽  
Harald Herrmann ◽  
Karoline V. Gleixner ◽  
Emir Hadzijusufovic ◽  
Sylvia Laffer ◽  
...  
Keyword(s):  
Mast Cell ◽  
Research Funding ◽  
Aurora Kinase ◽  
Cell Leukemia ◽  
Aurora Kinase A ◽  
Aurora Kinase B ◽  
Growth Inhibitory ◽  
Mast Cell Leukemia ◽  
Kit D816v ◽  
Kinase A

Abstract Abstract 3972 Systemic mastocytosis (SM) is a myeloid neoplasm defined by abnormal growth and accumulation of neoplastic mast cells (MC) in one or more internal organs. In most patients, the D816V-mutated variant of KIT is detectable. This mutant supposedly confers resistance against several tyrosine kinase inhibitors including imatinib and masitinib. In aggressive SM (ASM) or mast cell leukemia (MCL) the response to conventional drugs is poor and the prognosis is grave. In these patients, additional KIT-independent signalling pathways and molecules, such as BTK and LYN may play an important role in disease evolution and MC proliferation. R763/AS703569 is a multikinase inhibitor that blocks the kinase activity of KIT, BTK, LYN, Aurora-Kinase-A, Aurora-Kinase-B, ABL, AKT, and FLT3. We analyzed the effects of R763/AS703569 on growth and survival of the human mast cell leukemia cell line HMC-1 and the canine mastocytoma cell line C2. Two subclones of HMC-1 were used, one expressing KIT D816V (HMC-1.2) and one lacking KIT D816V (HMC-1.1). Both HMC-1 subclones were found to express Aurora-Kinase-A mRNA and Aurora-Kinase-B mRNA in RT-PCR experiments. As assessed by 3H-thymidine uptake, R763/AS703569 was found to inhibit proliferation of HMC-1 cells in a dose-dependent manner, with lower IC50 values obtained in HMC-1.2 cells (1-5 nM) compared to HMC-1.1 cells (10-10-50 nM). Moreover, R763/AS703569 produced growth inhibition in C2 cells (IC50: 1–5 nM). As assessed by light microscopy and Tunel assay, the growth-inhibitory effects of R763/AS703569 were found to be accompanied by apoptosis in all three cell lines. Correspondingly, R763/AS703569 was found to induce cleavage of caspase-3, caspase-8, and caspase-9 in HMC-1 cells. Moreover, R763/AS703569 was found to induce a G2/M cell cycle arrest in HMC-1 cells and C2 cells after 24 hours. In order to define the target spectrum for R763/AS703569 in HMC-1 cells, Western blot experiments were performed. In these experiments, R763/AS703569 was found to inhibit the phosphorylation of KIT, Aurora-Kinase-A, and BTK in HMC-1.1 cells, whereas no effects of R763/AS703569 on phosphorylation of LYN were seen. We then combined R763/AS703569 with dasatinib, a drug known to block LYN activation in HMC-1 cells. In these experiments, we were able to show that both drugs cooperate with each other in inducing apoptosis in HMC-1.1 cells and HMC-1.2 cells. In summary, our data suggest that R763/AS703569 is a novel promising drug that should be tested for its anti-neoplastic effects in patients with ASM and MCL in clinical trials. Complete inhibition of growth of neoplastic MC may require drug combinations employing R763/AS703569 and other targeted or cytotoxic drugs. Disclosures: Sarno: Merck-Serono: Employment. Valent:Novartis: Research Funding; Bristol-Myers Squibb: Research Funding; Merck-Serono: Research Funding.

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