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https://www.readbyqxmd.com/read/28821013/rictor-positively-regulates-b-cell-receptor-signaling-by-modulating-actin-reorganization-via-ezrin
#1
Lu Huang, Yongjie Zhang, Chenguang Xu, Xiaomei Gu, Linlin Niu, Jinzhi Wang, Xiaoyu Sun, Xiaoming Bai, Xingtian Xuan, Qubei Li, Chunwei Shi, Bing Yu, Heather Miller, Gangyi Yang, Lisa S Westerberg, Wanli Liu, Wenxia Song, Xiaodong Zhao, Chaohong Liu
As the central hub of the metabolism machinery, the mammalian target of rapamycin complex 2 (mTORC2) has been well studied in lymphocytes. As an obligatory component of mTORC2, the role of Rictor in T cells is well established. However, the role of Rictor in B cells still remains elusive. Rictor is involved in B cell development, especially the peripheral development. However, the role of Rictor on B cell receptor (BCR) signaling as well as the underlying cellular and molecular mechanism is still unknown. This study used B cell-specfic Rictor knockout (KO) mice to investigate how Rictor regulates BCR signaling...
August 2017: PLoS Biology
https://www.readbyqxmd.com/read/28820947/dysregulated-mitogen-activated-protein-kinase-and-matrix-metalloproteinase-in-ethanol-induced-cavernosal-dysfunction
#2
Jaqueline Jóice Muniz, Leticia Nogueira Leite, Riccardo Lacchini, Jose E Tanus-Santos, Carlos Renato Tirapelli
We evaluated the effects of ethanol consumption on the mitogen-activated protein kinases (MAPK) and metalloproteinases (MMP) pathways in the rat cavernosal smooth muscle (CSM). Male Wistar rats were treated with ethanol (20% vol./vol.) for six weeks. Quantitative real-time polymerase chain reaction experiments showed that ethanol consumption did not alter mRNA levels of p38MAPK, SAPK/JNK, ERK1/2, MMP-2 or MMP-9 in the rat CSM. Western immunoblotting experiments revealed decreased protein expression of p38MAPK and phosphorylation of SAPK/JNK in the CSM from ethanol-treated rats...
August 18, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28820908/ribosomopathy-like-properties-of-murine-and-human-cancers
#3
Sucheta Kulkarni, James M Dolezal, Huabo Wang, Laura Jackson, Jie Lu, Brian P Frodey, Atinuke Dosunmu-Ogunbi, Youjun Li, Marc Fromherz, Audry Kang, Lucas Santana-Santos, Panayiotis V Benos, Edward V Prochownik
Ribosomopathies comprise a heterogeneous group of hematologic and developmental disorders, often characterized by bone marrow failure, skeletal and other developmental abnormalities and cancer predisposition. They are associated with mutations and/or haplo-insufficiencies of ribosomal proteins (RPs) and inefficient ribosomal RNA (rRNA) processing. The resulting ribosomal stress induces the canonical p19ARF/Mdm2/p53 tumor suppressor pathway leading to proliferative arrest and/or apoptosis. It has been proposed that this pathway is then inactivated during subsequent neoplastic evolution...
2017: PloS One
https://www.readbyqxmd.com/read/28820743/sleep-apnea-a-review-of-diagnostic-sensors-algorithms-and-therapies
#4
Mehdi Shokoueinejad, Chris Fernandez, Emily Carroll, Fa Wang, Jake Levin, Sam Rusk, Nick Glattard, Ashley Mulchrone, Xuan Zhang, Ailiang Xie, Mihaela Teodorescu, Jerome Dempsey, John Webster
While public awareness of sleep related disorders is growing, sleep apnea syndrome (SAS) remains a public health and economic challenge. Over the last two decades, extensive controlled epidemiologic research has clarified the incidence, risk factors including the obesity epidemic, and global prevalence of obstructive sleep apnea (OSA), as well as establishing a growing body of literature linking OSA with cardiovascular morbidity, mortality, metabolic dysregulation, and neurocognitive impairment. The US Institute of Medicine Committee on Sleep Medicine estimates that 50-70 million US adults have sleep or wakefulness disorders...
August 18, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28820495/human-papillomavirus-and-the-dna-damage-response-exploiting-host-repair-pathways-for-viral-replication
#5
REVIEW
Chelsey C Spriggs, Laimonis A Laimins
High-risk human papillomaviruses (HPVs) are the causative agents of cervical and other genital cancers. In addition, HPV infections are associated with the development of many oropharyngeal cancers. HPVs activate and repress a number of host cellular pathways to promote their viral life cycles, including those of the DNA damage response. High-risk HPVs activate the ataxia telangiectasia-mutated (ATM) and ATM and Rad3-related (ATR) DNA damage repair pathways, which are essential for viral replication (particularly differentiation-dependent genome amplification)...
August 18, 2017: Viruses
https://www.readbyqxmd.com/read/28820062/urokinase-type-plasminogen-activator-and-the-molecular-mechanisms-of-its-regulation-in-cancer
#6
Juan Francisco Santibanez
Urokinase type plasminogen activator (uPA) is a 53-kDa serine protease initially synthesized as a catalytically inactive single chain polypeptide. Inactive-uPA is subject to proteolytic cleavage which results in the two-chain active protein. uPA plays key roles in the enhancement of cell malignancy during tumor progression. uPA is finely regulated in normal cells, but dysregulated in tumor cells, which results in increased cellular invasion capacities reflecting changes in uPA activity and expression during tumor progression...
August 18, 2017: Protein and Peptide Letters
https://www.readbyqxmd.com/read/28820053/neurobiological-mechanisms-of-stress-resilience-and-implications-for-the-aged-population
#7
Charlène Faye, Josephine C Mcgowan, Christine A Denny, Denis J David
Stress is a common reaction to an environmental adversity, but a dysregulation of the stress response can lead to psychiatric illnesses such as major depressive disorder (MDD), post-traumatic stress disorder (PTSD), and anxiety disorders. Yet, not all individuals exposed to stress will develop psychiatric disorders; those with enhanced stress resilience mechanisms have the ability to adapt successfully to stress without developing persistent psychopathology. Notably, the potential to enhance stress resilience in at-risk populations may prevent the onset of stress-induced psychiatric disorders...
August 17, 2017: Current Neuropharmacology
https://www.readbyqxmd.com/read/28819984/adherence-to-diurnal-cortisol-sampling-among-mother-child-dyads-from-maltreating-and-nonmaltreating-families
#8
Kristin Valentino, Ashley De Alba, Leah C Hibel, Kaitlin Fondren, Christina G McDonnell
There has been increasing interest in evaluating whether interventions for child maltreatment can improve and/or prevent child physiological dysregulation via measurement of diurnal cortisol. The assessment of diurnal cortisol typically involves the home-based collection of saliva multiple times per day, bringing forth important methodological considerations regarding adherence to collection instructions. To date, there has been no data regarding adherence to home collection of diurnal cortisol among maltreating families...
January 1, 2017: Child Maltreatment
https://www.readbyqxmd.com/read/28819432/silencing-of-hjurp-induces-dysregulation-of-cell-cycle-and-ros-metabolism-in-bladder-cancer-cells-via-ppar%C3%AE-sirt1-feedback-loop
#9
Rui Cao, Gang Wang, Kaiyu Qian, Liang Chen, Guofeng Qian, Conghua Xie, Han C Dan, Wei Jiang, Min Wu, Chin-Lee Wu, Yu Xiao, Xinghuan Wang
Holliday Junction Recognition Protein (HJURP) is a centromeric histone chaperone involving in de novo histone H3 variant CenH3 (CENP-A) recruitment. Our transcriptome and in vivo study revealed that HJURP is significantly upregulated in bladder cancer (BCa) tissues at both mRNA and protein levels. Knockdown of HJURP inhibited proliferation and viability of BCa cell lines revealed by CCK-8, colony formation and Ki-67-staining assays, and induced apoptosis and reactive oxygen species (ROS) production, as well as triggered cell cycle arrest at G0/G1 phase possibly via loss of CENP-A...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/28819426/central-role-of-cemip-in-tumorigenesis-and-its-potential-as-therapeutic-target
#10
REVIEW
Li Li, Lin-Hai Yan, Shwetha Manoj, Ying Li, Lu Lu
CEMIP (KIAA1199) was identified as migratory indicator protein which had been crudely studied in the last decade. Firstly its mutation site was reported to cause hearing loss due to the folding change of protein structure, meanwhile the over-expression of CEMIP referred to dreadful invasion and uncontrolled proliferation of tumor with distant metastasis, dedifferentiation, and limited survival opportunity of patients. Especially, over-expressed CEMIP also protected malignant tumor from strict microenvironment in hypoxia, low glucose and cracked barrier, leading to enhanced adaptability of tumor by stimulating the Wnt, EGFR, FGFR pathway...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/28819298/transcriptome-based-network-analysis-reveals-renal-cell-type-specific-dysregulation-of-hypoxia-associated-transcripts
#11
Natallia Shved, Gregor Warsow, Felix Eichinger, David Hoogewijs, Simone Brandt, Peter Wild, Matthias Kretzler, Clemens D Cohen, Maja T Lindenmeyer
Accumulating evidence suggests that dysregulation of hypoxia-regulated transcriptional mechanisms is involved in development of chronic kidney diseases (CKD). However, it remains unclear how hypoxia-induced transcription factors (HIFs) and subsequent biological processes contribute to CKD development and progression. In our study, genome-wide expression profiles of more than 200 renal biopsies from patients with different CKD stages revealed significant correlation of HIF-target genes with eGFR in glomeruli and tubulointerstitium...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28819214/hiv-1-nef-induced-cardiotoxicity-through-dysregulation-of-autophagy
#12
Manish K Gupta, Rafal Kaminski, Brian Mullen, Jennifer Gordon, Tricia H Burdo, Joseph Y Cheung, Arthur M Feldman, Muniswamy Madesh, Kamel Khalili
Cardiovascular disease is a leading cause of co-morbidity in HIV-1 positive patients, even those in whom plasma virus levels are well-controlled. The pathogenic mechanism of HIV-1-associated cardiomyopathy is unknown, but has been presumed to be mediated indirectly, owing to the absence of productive HIV-1 replication in cardiomyocytes. We sought to investigate the effect of the HIV-1 auxiliary protein, Nef, which is suspected of extracellular release by infected CD4+ T cells on protein quality control and autophagy in cardiomyocytes...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28819100/blockage-of-the-lysosome-dependent-autophagic-pathway-contributes-to-complement-membrane-attack-complex-induced-podocyte-injury-in-idiopathic-membranous-nephropathy
#13
Wei Jing Liu, Zhi-Hang Li, Xiao-Cui Chen, Xiao-Lu Zhao, Zhen Zhong, Chen Yang, Hong-Luan Wu, Ning An, Wei-Yan Li, Hua-Feng Liu
Dysregulation of autophagy-mediated podocyte homeostasis is proposed to play a role in idiopathic membranous nephropathy (IMN). In the present study, autophagic activity and lysosomal alterations were investigated in podocytes of IMN patients and in cultured podocytes exposed to sublytic terminal complement complex, C5b-9. C5b-9 upregulated the number of LC3 positive puncta and the expression of p62 in patient podocytes and in C5b-9 injuried podocyte model. The lysosomal turnover of LC3-II was not influenced, although the BECN1 expression level was upregulated after exposure of podocytes to C5b-9...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28819082/dysregulation-of-calpain-proteolytic-systems-underlies-degenerative-vascular-disorders
#14
Takuro Miyazaki, Akira Miyazaki
Chronic vascular diseases such as atherosclerosis, aneurysms, diabetic angiopathy/retinopathy as well as fibrotic and proliferative vascular diseases are generally complicated by the progression of degenerative insults, which are characterized by endothelial dysfunction, apoptotic/necrotic cell death in vascular/immune cells, remodeling of extracellular matrix or breakdown of elastic lamella. Increasing evidence suggests that dysfunctional calpain proteolytic systems and defective calpain protein metabolism in blood vessels contribute to degenerative disorders...
August 17, 2017: Journal of Atherosclerosis and Thrombosis
https://www.readbyqxmd.com/read/28819074/-molecular-pathogenesis-of-polyglutamine-diseases
#15
Yuji Takahashi
Polyglutamine diseases result from gain-of-function mutations. The expanded polyglutamine tracts lead to conformational changes in proteins, resulting in their aggregation. The intermediates including monomers or oligomers, are more toxic than the aggregates to neurons. At the molecular level, protein misfolding, transcriptional dysregulation, deranged calcium homeostasis, impaired cytoskeleton/axonal transport, mitochondrial dysfunction, and RNA toxicity contribute to disease progression. Understanding the underlying pathogenesis facilitates development of therapy for polyglutamine diseases...
August 2017: Brain and Nerve, Shinkei Kenkyū No Shinpo
https://www.readbyqxmd.com/read/28818789/immune-mechanisms-of-respiratory-viral-infections-in-asthma
#16
REVIEW
Hugo A Farne, Sebastian L Johnston
The more severe pathology respiratory viral infections produce in asthma sufferers is a result of a dysregulated immune response. Excess type 2 inflammation is a well-described feature of virally induced asthma exacerbations, with growing evidence that production of antiviral interferons may also be impaired. However, the mechanisms underlying these are little understood. This review summarizes the current understanding and recent discoveries of the cellular and molecular events that follow viral infections in asthma...
August 14, 2017: Current Opinion in Immunology
https://www.readbyqxmd.com/read/28818737/genome-wide-dna-methylation-profiling-of-articular-cartilage-reveals-significant-epigenetic-alterations-in-kashin-beck-disease-and-osteoarthritis
#17
Wenyu Wang, Yan Yu, Jingcan Hao, Yan Wen, Jing Han, Weikun Hou, Ruiyu Liu, Bo Zhao, Awen He, Ping Li, Qianrui Fan, Cuiyan Wu, Sen Wang, Xi Wang, Yujie Ning, Xiong Guo, Feng Zhang
OBJECTIVE: To determine genome-wide DNA methylation profiles of knee cartilage from patients with Kashin-Beck disease (KBD) and osteoarthritis (OA). METHOD: Knee cartilage was collected from 14 grade III KBD patients, 5 primary OA patients and 13 healthy subjects. The genome-wide methylation profiles of 5 KBD cartilage, 5 OA cartilage and 5 normal cartilage were determined by Illumina HumanMethylation450 array. Illumina Methylation Analyzer package was employed for identifying differentially methylated CpG sites...
August 14, 2017: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/28818733/effects-of-childhood-trauma-exposure-and-cortisol-levels-on-cognitive-functioning-among-breast-cancer-survivors
#18
Charles Kamen, Caroline Scheiber, Michelle Janelsins, Booil Jo, Hanyang Shen, Oxana Palesh
Cognitive functioning difficultiesin breast cancer patients receiving chemotherapy are common, but not all women experience these impairments. Exposure to childhood trauma may impair cognitive functioning following chemotherapy, and these impairments may be mediated by dysregulation of hypothalamic-pituitary-adrenal (HPA) axis function and cortisol slope. This study evaluated the association between childhood trauma exposure, cortisol, and cognition in a sample of breast cancer survivors. 56 women completed measures of trauma exposure (the Traumatic Events Survey), salivary cortisol, and self-reported cognitive functioning (the Functional Assessment of Cancer Therapy - Cognitive)...
August 14, 2017: Child Abuse & Neglect
https://www.readbyqxmd.com/read/28818561/the-rise-and-fall-of-impulse-control-behavior-disorders
#19
Giovanni Cossu, Roberta Rinaldi, Carlo Colosimo
INTRODUCTION: Impulse control disorders (ICDs) are psychiatric disorders characterized by the failure to resist an impulse or by the temptation to perform an act that is harmful to oneself or to others. METHODS: ICDs, including pathological gambling, hypersexuality, compulsive eating and shopping, can occur as a complication of Parkinson's disease (PD) together with other behavioral disorders, including dopamine dysregulation syndrome. This review is based on a literature search updated to May 2017, focusing on the epidemiology, clinical features, and therapeutic options of ICDs associated with PD...
August 1, 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/28818497/drp1-regulates-mitochondrial-morphology-and-cell-proliferation-in-cutaneous-squamous-cell-carcinoma
#20
Shinya Kitamura, Teruki Yanagi, Keisuke Imafuku, Hiroo Hata, Riichiro Abe, Hiroshi Shimizu
BACKGROUND: Dynamin-related protein 1 (Drp1) mediates mitochondrial fission. Recently, several studies have shown that Drp1 plays an important role in some cancers. However, little is known about Drp1 in cutaneous squamous cell carcinoma (SCC). OBJECTIVE: To investigate the role of Drp1 in the tumorigenesis of cutaneous SCCs. METHODS AND RESULTS: We investigated cell proliferation, cell cycle, mitochondrial morphology, and MAPK signaling pathway using cutaneous SCC A431 and DJM1 cells that were transfected with shRNA vectors targeting Drp1...
August 5, 2017: Journal of Dermatological Science
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