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https://www.readbyqxmd.com/read/28214206/involvement-of-prolyl-isomerase-pin1-in-the-cell-cycle-progression-and-proliferation-of-hepatic-oval-cells
#1
Prabodh Risal, Nirajan Shrestha, Lokendra Chand, Karl G Sylvester, Yeon Jun Jeong
Liver regenerates remarkably after toxic injury or surgical resection. In the case of failure of resident hepatocytes to restore loss, repopulation is carried out by induction, proliferation, and differentiation of the progenitor cell. Although, some signaling pathways have been verified to contribute oval cell-mediated liver regeneration, role of Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1(Pin1) in the oval cells proliferation is unknown. In the present study, we evaluate the role of Pin1 in oval cells proliferation...
January 18, 2017: Pathology, Research and Practice
https://www.readbyqxmd.com/read/28212614/transcriptomic-profiling-provides-molecular-insights-into-hydrogen-peroxide-induced-adventitious-rooting-in-mung-bean-seedlings
#2
Shi-Weng Li, Yan Leng, Rui-Fang Shi
BACKGROUND: Hydrogen peroxide (H2O2) has been known to function as a signalling molecule involved in the modulation of various physiological processes in plants. H2O2 has been shown to act as a promoter during adventitious root formation in hypocotyl cuttings. In this study, RNA-Seq was performed to reveal the molecular mechanisms underlying H2O2-induced adventitious rooting. RESULTS: RNA-Seq data revealed that H2O2 treatment greatly increased the numbers of clean reads and expressed genes and abundance of gene expression relative to the water treatment...
February 17, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28203298/prolyl-isomerase-pin1-and-neurotrophins-a-loop-that-may-determine-the-fate-of-cells-in-cancer-and-neurodegeneration
#3
REVIEW
Francesco Angelucci, Jakub Hort
Increased survival, differentiation, and apoptotic death are common mechanisms relevant for both cancer and neurodegenerative diseases. Although these disorders are characterized by different manifestations, it appears that a common mechanism may be present which directs the fate of a cell to either degeneration or proliferation. There are two classes of proteins that have been extensively investigated in these diseases but their possible interaction during signal transduction has not been studied. Prolyl isomerase Pin1 is an enzyme which translates Ser/Thr-Pro phosphorylation into conformational changes able to modify the activities of its substrates...
January 2017: Therapeutic Advances in Medical Oncology
https://www.readbyqxmd.com/read/28198538/role-of-pin1-on-in-vivo-periodontal-tissue-and-in-vitro-cells
#4
K-H Park, E-H Cho, W-J Bae, H-S Kim, H-C Lim, Y-D Park, M-O Lee, E-S Cho, E-C Kim
BACKGROUND: Although expression of peptidyl-prolyl cis/trans isomerase NIMA-interacting 1 (PIN1) was reported in bone tissue, the precise role of PIN1 in periodontal tissue and cells remain unclear. MATERIAL & METHODS: To elucidate the roles of PIN1 in periodontal tissue, its expression in periodontal tissue and cells, and effects on in vitro 4 osteoblast differentiation and the underlying signaling mechanisms were evaluated. RESULTS: PIN1 was expressed in mouse periodontal tissues including periodontal ligament cells (PDLCs), cementoblasts and osteoblasts at the developing root formation stage (postnatal, PN14) and functional stage of tooth (PN28)...
February 15, 2017: Journal of Periodontal Research
https://www.readbyqxmd.com/read/28184937/rhein-exhibits-antitumorigenic-effects-by-interfering-with-the-interaction-between-prolyl-isomerase-pin1-and-c-jun
#5
Jin Hyoung Cho, Jung-Il Chae, Jung-Hyun Shim
The Pin1 protein (or peptidyl-prolyl cis/trans isomerase) specifically catalyzes the cis/trans isomerization of phosphorylated serine/threonine-proline (Ser/Thr-Pro) bonds and plays an important role in many cellular events through the effects of conformational change in the function of c-Jun, its biological substrate. Pin1 expression is involved in essential cellular pathways that mediate cell proliferation, cell cycle progression, tumorigenesis and apoptosis by altering their stability and function, and it is overexpressed in various types of tumors...
March 2017: Oncology Reports
https://www.readbyqxmd.com/read/28167297/loss-of-pin1-suppresses-hedgehog-driven-medulloblastoma-tumorigenesis
#6
Tao Xu, Honglai Zhang, Sung-Soo Park, Sriram Venneti, Rork Kuick, Kimberly Ha, Lowell Evan Michael, Mariarita Santi, Chiyoko Uchida, Takafumi Uchida, Ashok Srinivasan, James M Olson, Andrzej A Dlugosz, Sandra Camelo-Piragua, Jean-François Rual
Medulloblastoma is the most common malignant brain tumor in children. Therapeutic approaches to medulloblastoma (combination of surgery, radiotherapy, and chemotherapy) have led to significant improvements, but these are achieved at a high cost to quality of life. Alternative therapeutic approaches are needed. Genetic mutations leading to the activation of the Hedgehog pathway drive tumorigenesis in ~30% of medulloblastoma. In a yeast two-hybrid proteomic screen, we discovered a novel interaction between GLI1, a key transcription factor for the mediation of Hedgehog signals, and PIN1, a peptidylprolyl cis/trans isomerase that regulates the postphosphorylation fate of its targets...
February 3, 2017: Neoplasia: An International Journal for Oncology Research
https://www.readbyqxmd.com/read/28166865/generation-of-shape-complexity-through-tissue-conflict-resolution
#7
Alexandra B Rebocho, Paul Southam, J Richard Kennaway, J Andrew Bangham, Enrico Coen
Out-of-plane tissue deformations are key morphogenetic events during plant and animal development that generate 3D shapes, such as flowers or limbs. However, the mechanisms by which spatiotemporal patterns of gene expression modify cellular behaviours to generate such deformations remain to be established. We use the Snapdragon flower as a model system to address this problem. Combining cellular analysis with tissue-level modelling, we show that an orthogonal pattern of growth orientations plays a key role in generating out-of-plane deformations...
February 7, 2017: ELife
https://www.readbyqxmd.com/read/28143738/manipulating-pml-sumoylation-via-silencing-ubc9-and-rnf4-regulates-cardiac-fibrosis
#8
Yu Liu, Dan Zhao, Fang Qiu, Ling-Ling Zhang, Shang-Kun Liu, Yuan-Yuan Li, Mei-Tong Liu, Di Wu, Jia-Xin Wang, Xiao-Qing Ding, Yan-Xin Liu, Chang-Jiang Dong, Xiao-Qi Shao, Bao-Feng Yang, Wen-Feng Chu
The promyelocytic leukemia protein (PML) is essential in the assembly of dynamic subnuclear structures called PML nuclear bodies (PML-NBs), which are involved in regulating diverse cellular functions. However, the possibility of PML being involved in cardiac disease has not been examined. In mice undergoing transverse aortic constriction (TAC) and arsenic trioxide (ATO) injection, transforming growth factor β1 (TGF-β1) was upregulated along with dynamic alteration of PML SUMOylation. In cultured neonatal mouse cardiac fibroblasts (NMCFs), ATO, angiotensin II (Ang II), and fetal bovine serum (FBS) significantly triggered PML SUMOylation and the assembly of PML-NBs...
January 28, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/28125291/epstein-barr-virus-induced-gene-2-ebi2-mediates-allergen-induced-leukocyte-migration-into-airways
#9
Zhong-Jian Shen, Jie Hu, Venkatesh Kashi, Elizabeth A Kelly, Loren C Denlinger, Kevin Garza, David Russell, Nizar N Jarjour, James S Malter
Background Leukocyte recruitment to sites of allergic inflammation depends on the local production of priming cytokines, chemokines, and potentially other mediators as well. Previously, we showed that eosinophils (Eos) express numerous orphan G-protein coupled receptors (GPRs) including EBI2. Despite its contribution to inflammatory diseases, the role of EBI2 in pulmonary eosinophilia is unknown. Objectives To determine whether oxysterol ligands for EBI2 are increased in asthma exacerbation and if, or how they promote eosinophil pulmonary migration...
January 26, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28098518/a-4-nitroquinoleneoxide-induced-pleurotus-eryngii-mutant-variety-increases-pin1-expression-in-rat-brain
#10
Yoonhwa Jeong, Mina Jung, Myeung Ju Kim, Cheol Ho Hwang
To develop Pleurotus eryngii varieties with improved medicinal qualities, protoplasts of P. eryngii were mutagenized using 4-nitroquinoleneoxide. The effects of the resulting variant mushrooms on a human cell were evaluated by applying their aqueous extracts to the human hepatoma cell line, HepG2, in vitro and examining any alteration in the proteomes of the treated HepG2. The P. eryngii mutant, NQ2A-12, was selected for its effects on increasing the expression level of Pin1 in HepG2. Pin1 is one of the peptidyl-prolyl cis-trans isomerases known to play an important role in repressing Alzheimer's disease pathogenesis...
January 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/28096328/dynamic-pin-formed-auxin-efflux-carrier-phosphorylation-at-the-plasma-membrane-controls-auxin-efflux-dependent-growth
#11
Benjamin Weller, Melina Zourelidou, Lena Frank, Inês C R Barbosa, Astrid Fastner, Sandra Richter, Gerd Jürgens, Ulrich Z Hammes, Claus Schwechheimer
The directional distribution of the phytohormone auxin is essential for plant development. Directional auxin transport is mediated by the polarly distributed PIN-FORMED (PIN) auxin efflux carriers. We have previously shown that efficient PIN1-mediated auxin efflux requires activation through phosphorylation at the four serines S1-S4 in Arabidopsis thaliana The Brefeldin A (BFA)-sensitive D6 PROTEIN KINASE (D6PK) and the BFA-insensitive PINOID (PID) phosphorylate and activate PIN1 through phosphorylation at all four phosphosites...
January 31, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28076852/mir-874-3p-is-down-regulated-in-hepatocellular-carcinoma-and-negatively-regulates-pin1-expression
#12
Ka-Wai Leong, Chi-Wai Cheng, Chun-Ming Wong, Irene Oi-Lin Ng, Yok-Lam Kwong, Eric Tse
PIN1 is a peptidyl-prolyl cis/trans isomerase (PPIase) that regulates multiple signaling pathways to control cell fate and is found to be over-expressed in cancers, including hepatocellular carcinoma (HCC). However, the regulation of PIN1 in HCC remains poorly defined. Micro-RNAs (miRNAs) have been reported to play a pivotal role in oncogenesis by targeting the 3'-untranslated region (UTR) of mRNAs encoded by oncogenes and tumour suppressor genes, thereby suppressing the levels of both oncoproteins and tumour suppressors...
January 5, 2017: Oncotarget
https://www.readbyqxmd.com/read/28074634/arf2-coordinates-with-plethoras-and-pins-to-orchestrate-aba-mediated-root-meristem-activity-in-arabidopsis%C3%A2
#13
Sujittra Promchuea, Yujuan Zhu, Zhizhong Chen, Jing Zhang, Zhizhong Gong
Multiple hormones, including abscisic acid (ABA) and auxin, regulate cell division and differentiation of Arabidopsis root meristems. AUXIN RESPONSE FACTOR 2 (ARF2) functions as a negative regulator of ABA responses, as seed germination and primary root growth of arf2 mutants are hypersensitive to ABA. In this study, we found that ABA treatment reduced the expression levels of the PIN-FORMEDs (PIN) auxin efflux carriers, PIN1, PIN3, PIN4, and PIN7, to a greater extent in the root meristems of arf2-101 mutant than in the wild type...
January 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/28049756/a-role-for-prolyl-isomerase-pin1-in-the-phosphorylation-dependent-modulation-of-prrxl1-function
#14
Ricardo Soares-Dos-Reis, Ana Sofia Pessoa, Ana Filipa Dias, Miguel Falcão, Mariana Raimundo Matos, Rui Vitorino, Filipe Almeida Monteiro, Deolinda Lima, Carlos Reguenga
Prrxl1 encodes for a paired-like homeodomain transcription factor essential for the correct establishment of the dorsal root ganglion - spinal cord nociceptive circuitry during development. Prrxl1 -null mice display gross anatomical disruption of this circuitry, which translates to a markedly diminished sensitivity to noxious stimuli. Here, by the use of an Immunoprecipitation-Mass Spectrometry approach, we identify 5 highly conserved phosphorylation sites (T110, S119, S231, S233, S251) in PRRXL1 primary structure...
January 3, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28032861/the-protein-level-and-transcription-activity-of-activating-transcription-factor-1-is-regulated-by-prolyl-isomerase-pin1-in-nasopharyngeal-carcinoma-progression
#15
Guo-Liang Huang, Dan Liao, Hua Chen, Yan Lu, Liyong Chen, Huahui Li, Binbin Li, Weilong Liu, Caiguo Ye, Tong Li, Zhu Zhu, Jian Wang, Takafumi Uchida, Ying Zou, Zigang Dong, Zhiwei He
The function of activating transcription factor 1 (ATF1) and the mechanism about why ATF1 was over-phosphorylated in nasopharyngeal carcinoma (NPC) progression is completely undiscovered. In this study, a series of experiments both in vitro and in vivo were used to characterize a promotive function of ATF1 in NPC tumorigenesis and identify prolyl isomerase Pin1 as a novel regulator of ATF1 at post-transcription. First, we found that overexpression of ATF1 promoted colony formation in NPC. However, the high protein level of ATF1 in NPC was not resulted from high mRNA level...
December 29, 2016: Cell Death & Disease
https://www.readbyqxmd.com/read/28018411/melatonin-regulates-root-meristem-by-repressing-auxin-synthesis-and-polar-auxin-transport-in-arabidopsis
#16
Qiannan Wang, Bang An, Yunxie Wei, Russel J Reiter, Haitao Shi, Hongli Luo, Chaozu He
Melatonin (N-acetyl-5-methoxytryptamine) plays important roles in regulating both biotic and abiotic stress tolerance, biological rhythms, plant growth and development. Sharing the same substrate (tryptophan) for the biosynthesis, melatonin and auxin also have similar effects in plant development. However, the specific function of melatonin in modulating plant root growth and the relationship between melatonin and auxin as well as underlying mechanisms are still unclear. In this study, we found high concentration of melatonin remarkably inhibited root growth in Arabidopsis by reducing root meristem size...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28018099/understanding-the-role-of-pin1-in-hepatocellular-carcinoma
#17
REVIEW
Chi-Wai Cheng, Ka-Wai Leong, Eric Tse
PIN1 is a peptidyl-prolyl cis/trans isomerase that binds and catalyses isomerization of the specific motif comprising a phosphorylated serine or threonine residue preceding a proline (pSer/Thr-Pro) in proteins. PIN1 can therefore induce conformational and functional changes of its interacting proteins that are regulated by proline-directed serine/threonine phosphorylation. Through this phosphorylation-dependent prolyl isomerization, PIN1 fine-tunes the functions of key phosphoproteins (e.g., cyclin D1, survivin, β-catenin and x-protein of hepatitis B virus) that are involved in the regulation of cell cycle progression, apoptosis, proliferation and oncogenic transformation...
December 7, 2016: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/27997878/design-and-synthesis-of-novel-2-substituted-11-keto-boswellic-acid-heterocyclic-derivatives-as-anti-prostate-cancer-agents-with-pin1-inhibition-ability
#18
Kun Li, Lei Li, Shuxiang Wang, Xiaojing Li, Tianyi Ma, Dan Liu, Yongkui Jing, Linxiang Zhao
A series of novel acetyl-11-keto-β-boswellic acid (AKBA) derivatives with a different electron-withdrawing group on ring A and a nitrogen heterocycle at C-24 were designed and synthesized. These semi-synthetic compounds showed improved anti-proliferative activity against prostate cancer cells over AKBA. Compound 8f bearing 2-cyano-3,11-dioxo moiety and piperazine was the most potent to inhibit growth of prostate cancer PC-3 (IC50 = 0.04 μM) and LNCaP (IC50 = 0.27 μM) cell lines. 8f caused cell cycle arrest in G2/M and induced apoptosis...
January 27, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/27975268/pin1-knockout-mice-a-model-for-the-study-of-tau-pathology-in-alzheimer-s-disease
#19
Asami Kondo, Onder Albayram, Xiao Zhen Zhou, Kun Ping Lu
Pin1 knockout in mice causes age-dependent neuropathy characterized by motor and behavioral deficits, tau hyper phosphorylation, tau filament formation, and neuronal degradation. Here, we describe the methods with mouse behavior test, immunostaining, and immunoblotting to detect many aspects of neurodegeneration in Pin1 knockout mice.
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27973841/conformational-substrate-selection-contributes-to-the-enzymatic-catalytic-reaction-mechanism-of-pin1
#20
Esteban Vöhringer-Martinez, Ciro Dörner
Conformational changes in enzymes and their role in their catalytic activity have been thoroughly addressed experimentally and theoretically. There is a vivid discussion in the field of enzyme catalysis on whether conformational changes of the enzyme are coupled to catalysis, or whether transition state stabilization through the preorganized protein and its electrostatic properties govern the catalysis. In this study, an additional contribution to the catalysis of one specific enzyme, Pin1, is proposed, which arises from its conformational selection of the peptide substrate from aqueous solution with the lowest activation barrier...
December 15, 2016: Journal of Physical Chemistry. B
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