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https://www.readbyqxmd.com/read/29189098/the-effects-of-ovarian-hormones-on-stressor-induced-hormonal-responses-glucocorticoid-receptor-expression-and-translocation-and-genes-related-to-receptor-signaling-in-adult-female-rats
#1
Matthew R Green, Marina L Marcolin, Cheryl M McCormick
Estradiol potentiates hypothalamic-pituitary-adrenal activity and delays the return of glucocorticoid secretion to baseline after a stressor exposure in female rats; we investigated whether estradiol effects involve actions on glucocorticoid receptor (GR) translocation and expression of receptor co-chaperones. In Experiment 1 intact females and ovariectomized (OVX) females were treated for four days with vehicle (VEH), 17β-estradiol benzoate (EB), or EB and progesterone (EB + P). Samples were taken from rats in the home cage (baseline) or after 30 min of restraint stress in a plastic restrainer (post-restraint) (n = 10/group)...
November 30, 2017: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/29099775/whole-blood-mrna-expression-based-prognosis-of-metastatic-renal-cell-carcinoma
#2
Karthik V Giridhar, Carlos P Sosa, David W Hillman, Cristobal Sanhueza, Candace L Dalpiaz, Brian A Costello, Fernando J Quevedo, Henry C Pitot, Roxana S Dronca, Donna Ertz, John C Cheville, Krishna Vanaja Donkena, Manish Kohli
The Memorial Sloan Kettering Cancer Center (MSKCC) prognostic score is based on clinical parameters. We analyzed whole blood mRNA expression in metastatic clear cell renal cell carcinoma (mCCRCC) patients and compared it to the MSKCC score for predicting overall survival. In a discovery set of 19 patients with mRCC, we performed whole transcriptome RNA sequencing and selected eighteen candidate genes for further evaluation based on associations with overall survival and statistical significance. In an independent validation of set of 47 patients with mCCRCC, transcript expression of the 18 candidate genes were quantified using a customized NanoString probeset...
November 3, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28680390/the-role-of-the-heat-shock-protein-b8-hspb8-in-motoneuron-diseases
#3
REVIEW
Paola Rusmini, Riccardo Cristofani, Mariarita Galbiati, Maria E Cicardi, Marco Meroni, Veronica Ferrari, Giulia Vezzoli, Barbara Tedesco, Elio Messi, Margherita Piccolella, Serena Carra, Valeria Crippa, Angelo Poletti
Amyotrophic lateral sclerosis (ALS) and spinal and bulbar muscular atrophy (SBMA) are two motoneuron diseases (MNDs) characterized by aberrant protein behavior in affected cells. In familial ALS (fALS) and in SBMA specific gene mutations lead to the production of neurotoxic proteins or peptides prone to misfold, which then accumulate in form of aggregates. Notably, some of these proteins accumulate into aggregates also in sporadic ALS (sALS) even if not mutated. To prevent proteotoxic stresses detrimental to cells, misfolded and/or aggregated proteins must be rapidly removed by the protein quality control (PQC) system...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28677535/generation-of-a-bag1-homozygous-knockout-mouse-embryonic-stem-cell-line-using-crispr-cas9
#4
Cheng-Cheng Tang, Li Pik Shan, Wu-Ming Wang, Gang Lu, Rahul S Tare, Kenneth Ka Ho Lee
Bag1 transcribes a multifunctional protein that participates in many important biological processes such as cell apoptosis, proliferation, differentiation and embryo development. Despite numerous published studies, the role of Bag1 in the context of embryonic stem (ES) cells, has not been explored. To investigate the function of Bag1 in ES cells, we generated mutant Bag1(-/-) ES cells using the CRISPR/Cas9 system. We established that the Bag1 double knockout ES cell line maintained their pluripotency, possessed a normal karyotype and the ability to differentiate into all three germ layers...
May 2017: Stem Cell Research
https://www.readbyqxmd.com/read/28439591/targeting-secondary-protein-complexes-in-drug-discovery-studying-the-druggability-and-chemical-biology-of-the-hsp70-bag1-complex
#5
Lindsay E Evans, Keith Jones, Matthew D Cheeseman
Proteins typically carry out their biological functions as multi-protein complexes, which can significantly affect the affinity of small-molecule inhibitors. HSP70 is an important target in oncology, so to study its chemical biology and the drug discovery potential of the HSP70/BAG1 complex, we designed a high-affinity non-nucleotide fluorescence polarisation probe.
May 4, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28424629/molecular-and-cellular-mechanisms-of-apoptosis-during-dissociated-spermatogenesis
#6
Tengfei Liu, Lingling Wang, Hong Chen, Yufei Huang, Ping Yang, Nisar Ahmed, Taozhi Wang, Yi Liu, Qiusheng Chen
Apoptosis is a tightly controlled process by which tissues eliminate unwanted cells. Spontaneous germ cell apoptosis in testis has been broadly investigated in mammals that have an associated spermatogenesis pattern. However, the mechanism of germ cell apoptosis in seasonally breeding reptiles following a dissociated spermatogenesis has remained enigmatic. In the present study, morphological evidence has clearly confirmed the dissociated spermatogenesis pattern in Pelodiscus sinensis. TUNEL and TEM analyses presented dynamic changes and ultrastructural characteristics of apoptotic germ cells during seasonal spermatogenesis, implying that apoptosis might be one of the key mechanisms to clear degraded germ cells...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28424560/an-exploratory-study-of-host-polymorphisms-in-genes-that-clinically-characterize-breast-cancer-tumors-and-pretreatment-cognitive-performance-in-breast-cancer-survivors
#7
Theresa A Koleck, Catherine M Bender, Beth Z Clark, Christopher M Ryan, Puja Ghotkar, Adam Brufsky, Priscilla F McAuliffe, Priya Rastogi, Susan M Sereika, Yvette P Conley
PURPOSE: Inspired by the hypothesis that heterogeneity in the biology of breast cancers at the cellular level may account for cognitive dysfunction symptom variability in survivors, the current study explored relationships between host single-nucleotide polymorphisms (SNPs) in 25 breast cancer-related candidate genes (AURKA, BAG1, BCL2, BIRC5, CCNB1, CD68, CENPA, CMC2, CTSL2, DIAPH3, ERBB2, ESR1, GRB7, GSTM1, MELK, MKI67, MMP11, MYBL2, NDC80, ORC6, PGR, RACGAP1, RFC4, RRM2, and SCUBE2), identified from clinically relevant prognostic multigene-expression profiles for breast cancer, and pretreatment cognitive performance...
2017: Breast Cancer: Targets and Therapy
https://www.readbyqxmd.com/read/28402699/inhibition-of-retrograde-transport-modulates-misfolded-protein-accumulation-and-clearance-in-motoneuron-diseases
#8
Riccardo Cristofani, Valeria Crippa, Paola Rusmini, Maria Elena Cicardi, Marco Meroni, Nausicaa V Licata, Gessica Sala, Elisa Giorgetti, Christopher Grunseich, Mariarita Galbiati, Margherita Piccolella, Elio Messi, Carlo Ferrarese, Serena Carra, Angelo Poletti
Motoneuron diseases, like spinal bulbar muscular atrophy (SBMA) and amyotrophic lateral sclerosis (ALS), are associated with proteins that because of gene mutation or peculiar structures, acquire aberrant (misfolded) conformations toxic to cells. To prevent misfolded protein toxicity, cells activate a protein quality control (PQC) system composed of chaperones and degradative pathways (proteasome and autophagy). Inefficient activation of the PQC system results in misfolded protein accumulation that ultimately leads to neuronal cell death, while efficient macroautophagy/autophagy-mediated degradation of aggregating proteins is beneficial...
August 3, 2017: Autophagy
https://www.readbyqxmd.com/read/28358147/a-plant-bcl-2-associated-athanogene-is-proteolytically-activated-to-confer-fungal-resistance
#9
COMMENT
Mehdi Kabbage, Ryan Kessens, Martin B Dickman
The Bcl-2-associated athanogene (BAG) family is a multifunctional group of proteins involved in numerous cellular functions ranging from apoptosis to tumorigenesis. These proteins are evolutionarily conserved and encode a characteristic region known as the BAG domain. BAGs function as adapter proteins forming complexes with signaling molecules and molecular chaperones. In humans, a role for BAG proteins has been suggested in tumor growth, HIV infection, and neurodegenerative diseases; as a result, the BAGs are attractive targets for therapeutic interventions, and their expression in cells may serve as a predictive tool for disease development...
April 16, 2016: Microbial Cell
https://www.readbyqxmd.com/read/28303856/effect-of-matrix-metallopeptidase-13-on-the-function-of-mouse-bone-marrow-derived-dendritic-cells
#10
Xiao-Dong Li, Xin-Rui Zhang, Zhi-Hao Li, Yang Yang, Duo Zhang, Heng Zheng, Shu-Ying Dong, Juan Chen, Xian-Dong Zeng
BACKGROUND: Dendritic cells are professional antigen-presenting cells found in an immature state in epithelia and interstitial space, where they capture antigens such as pathogens or damaged tissue. Matrix metallopeptidase 13 (MMP-13), a member of the collagenase subfamily, is involved in many different cellular processes and is expressed in murine bone marrow-derived dendritic cells (DCs). The function of MMP-13 in DCs is not well understood. Here, we investigated the effect of MMP-13 on DC maturation, apoptosis, and phagocytosis...
March 20, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28266723/contribution-of-dopamine-neurotransmission-in-proconvulsant-effect-of-toxoplasma-gondii-infection-in-male-mice
#11
Jalal Babaie, Mohammad Sayyah, Pezhman Fard-Esfahani, Majid Golkar, Kourosh Gharagozli
Epilepsy is one of the most common neurologic disorders worldwide with no distinguishable cause in 60% of patients. One-third of world's population is infected with Toxoplasma gondii (T. gondii). This intracellular parasite has high tendency to excitable cells including neurons. We assessed seizure susceptibility and involvement of dopaminergic system in male mice with acute and chronic T. gondii infection. Mice were infected by intraperitoneal injection of T. gondii cysts. Acute and chronic stages of infection were determined by quantification of SAG1/BAG1 transcripts and level of repetitive REP-529 sequence in the brain of mice by real-time PCR...
March 7, 2017: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/28251183/opposing-transcriptional-mechanisms-regulate-toxoplasma-development
#12
Dong-Pyo Hong, Joshua B Radke, Michael W White
The Toxoplasma biology that underlies human chronic infection is developmental conversion of the acute tachyzoite stage into the latent bradyzoite stage. We investigated the roles of two alkaline-stress-induced ApiAP2 transcription factors, AP2IV-3 and AP2IX-9, in bradyzoite development. These factors were expressed in two overlapping waves during bradyzoite development, with AP2IX-9 increasing expression earlier than AP2IV-3, which peaked as AP2IX-9 expression was declining. Disruption of the AP2IX-9 gene enhanced, while deletion of AP2IV-3 gene decreased, tissue cyst formation, demonstrating that these factors have opposite functions in bradyzoite development...
January 2017: MSphere
https://www.readbyqxmd.com/read/28165652/candidate-susceptibility-variants-for-esophageal-squamous-cell-carcinoma
#13
Iikki Donner, Riku Katainen, Tomas Tanskanen, Eevi Kaasinen, Mervi Aavikko, Kristian Ovaska, Miia Artama, Eero Pukkala, Lauri A Aaltonen
Esophageal cancer is common worldwide, and often fatal. The major histological subtype is esophageal squamous cell carcinoma (ESCC). ESCC shows familial aggregation and high heritability. Mutations in RHBDF2 cause tylosis, a very rare disorder characterized by high life-time risk of ESCC, but no other well-established predisposition genes have been identified. To identify candidate susceptibility variants for ESCC we utilized the Population Information System and the Finnish cancer registry to find study materials by clustering ESCC patients by family name at birth and municipality at birth...
June 2017: Genes, Chromosomes & Cancer
https://www.readbyqxmd.com/read/27998983/bag1-co-chaperone-promotes-trc8-e3-ligase-dependent-degradation-of-misfolded-human-ether-a-go-go-related-gene-herg-potassium-channels
#14
Christine Hantouche, Brittany Williamson, William C Valinsky, Joshua Solomon, Alvin Shrier, Jason C Young
Cardiac long QT syndrome type 2 is caused by mutations in the human ether a go-go-related gene (hERG) potassium channel, many of which cause misfolding and degradation at the endoplasmic reticulum instead of normal trafficking to the cell surface. The Hsc70/Hsp70 chaperones assist the folding of the hERG cytosolic domains. Here, we demonstrate that the Hsp70 nucleotide exchange factor Bag1 promotes hERG degradation by the ubiquitin-proteasome system at the endoplasmic reticulum to regulate hERG levels and channel activity...
February 10, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27682262/rare-copy-number-alterations-and-copy-neutral-loss-of-heterozygosity-revealed-in-ameloblastomas-by-high-density-whole-genome-microarray-analysis
#15
Marina Gonçalves Diniz, Alessandra Pires Duarte, Rolando A Villacis, Bruna V A Guimarães, Luiz Cláudio Pires Duarte, Sílvia R Rogatto, Ricardo Santiago Gomez, Carolina Cavaliéri Gomes
BACKGROUND: Ameloblastoma (unicystic, UA, or multicystic, MA) is a rare tumor associated with bone destruction and facial deformity. Its malignant counterpart is the ameloblastic carcinoma (AC). The BRAFV600E mutation is highly prevalent in all these tumors subtypes and cannot account for their different clinical behaviors. METHODS: We assessed copy number alterations (CNAs) and copy-neutral loss of heterozygosity (cnLOH) in UA (n = 2), MA (n = 3), and AC (n = 1) using the CytoScan HD Array (Affymetrix) and the BRAFV600E status...
September 28, 2016: Journal of Oral Pathology & Medicine
https://www.readbyqxmd.com/read/27633890/evaluation-of-paclitaxel-effects-in-the-pattern-of-expression-of-survival-and-apoptotic-genes-regulators-in-hela-cells
#16
Ugur Serbes, Ozlem D Ozsoylemez, Gul Ozcan
We aim to determine the regulation of apoptosis by paclitaxel-induced and understand cancer dynamics to treatment targets for HeLa cells by identifying decrease/increase genes expression on HeLa cells. In this study, the anti-tumor effects of Paclitaxel (PAC) on HeLa cells have been studied in order to determine the cellular and molecular mechanisms of these effects. PAC has been applied to HeLa cells in 6 different doses (3, 7.5, 15, 30, 60, 120 nM) for 48 hours and the IC50 dose MTT method, has been determined with apoptic index (AI) DAPI...
2016: Current Pharmaceutical Biotechnology
https://www.readbyqxmd.com/read/27524912/two-gene-signature-improves-the-discriminatory-power-of-iaslc-ats-ers-classification-to-predict-the-survival-of-patients-with-early-stage-lung-adenocarcinoma
#17
Yifeng Sun, Likun Hou, Yu Yang, Huikang Xie, Yang Yang, Zhigang Li, Heng Zhao, Wen Gao, Bo Su
BACKGROUND: In this study, we investigated the contribution of a gene expression-based signature (composed of BAG1, BRCA1, CDC6, CDK2AP1, ERBB3, FUT3, IL11, LCK, RND3, SH3BGR) to survival prediction for early-stage lung adenocarcinoma categorized by the new International Association for the Study of Lung Cancer (IASLC)/the American Thoracic Society (ATS)/the European Respiratory Society (ERS) classification. We also aimed to verify whether gene signature improves the risk discrimination of IASLC/ATS/ERS classification in early-stage lung adenocarcinoma...
2016: OncoTargets and Therapy
https://www.readbyqxmd.com/read/27514505/coinhibition-of-overexpressed-genes-in-acute-myeloid-leukemia-subtype-m2-by-gold-nanoparticles-functionalized-with-five-antisense-oligonucleotides-and-one-anti-cd33-cd34-aptamer
#18
M A Zaimy, A Jebali, B Bazrafshan, S Mehrtashfar, S Shabani, A Tavakoli, S H Hekmatimoghaddam, A Sarli, H Azizi, P Izadi, B Kazemi, A Shojaei, A Abdalaian, J Tavakkoly-Bazzaz
The aim of this study was to evaluate an engineered nanostructure to silence five important oncogenes, including BAG1, MDM2, Bcl-2, BIRC5 (survivin) and XIAP, in acute myeloid leukemia subtype 2 (AML-M2). The smart nanostructures were functionalized gold nanoparticles (FGNs) containing five antisense oligonucleotides (AOs) and one anti-CD33(+)/CD34(+) aptamer. First, the best AO for each gene was selected with the OligoWalk online software, and then different arrangements of AOs were evaluated with the RNAstructure software...
September 2016: Cancer Gene Therapy
https://www.readbyqxmd.com/read/27474739/non-canonical-interactions-between-heat-shock-cognate-protein-70-hsc70-and-bcl2-associated-anthanogene-bag-co-chaperones-are-important-for-client-release
#19
Jennifer N Rauch, Erik R P Zuiderweg, Jason E Gestwicki
Heat shock cognate protein 70 (Hsc70) regulates protein homeostasis through its reversible interactions with client proteins. Hsc70 has two major domains: a nucleotide-binding domain (NBD), that hydrolyzes ATP, and a substrate-binding domain (SBD), where clients are bound. Members of the BAG family of co-chaperones, including Bag1 and Bag3, are known to accelerate release of both ADP and client from Hsc70. The release of nucleotide is known to be mediated by interactions between the conserved BAG domain and the Hsc70 NBD...
September 16, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27162137/breaking-bag-the-co-chaperone-bag3-in-health-and-disease
#20
REVIEW
Christian Behl
Human BAG (Bcl-2-associated athanogene) proteins form a family of antiapoptotic proteins that currently consists of six members (BAG1-6) all sharing the BAG protein domain from which the name arises. Via this domain, BAG proteins bind to the heat shock protein 70 (Hsp70), thereby acting as a co-chaperone regulating the activity of Hsp70. In addition to their antiapoptotic activity, all human BAG proteins have distinct functions in health and disease, and BAG3 in particular is the focus of many investigations...
August 2016: Trends in Pharmacological Sciences
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