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https://www.readbyqxmd.com/read/28819133/combined-transcriptome-and-metabolome-analyses-of-metformin-effects-reveal-novel-links-between-metabolic-networks-in-steroidogenic-systems
#1
Sameer S Udhane, Balazs Legeza, Nesa Marti, Damian Hertig, Gaëlle Diserens, Jean-Marc Nuoffer, Peter Vermathen, Christa E Flück
Metformin is an antidiabetic drug, which inhibits mitochondrial respiratory-chain-complex I and thereby seems to affect the cellular metabolism in many ways. It is also used for the treatment of the polycystic ovary syndrome (PCOS), the most common endocrine disorder in women. In addition, metformin possesses antineoplastic properties. Although metformin promotes insulin-sensitivity and ameliorates reproductive abnormalities in PCOS, its exact mechanisms of action remain elusive. Therefore, we studied the transcriptome and the metabolome of metformin in human adrenal H295R cells...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28814519/extracellular-matrix-proteins-mediate-hiv-1-gp120-interactions-with-%C3%AE-4%C3%AE-7
#2
David Plotnik, Wenjin Guo, Brad Cleveland, Priska von Haller, Jimmy K Eng, Miklos Guttman, Kelly K Lee, James Arthos, Shiu-Lok Hu
Gut-homing α4β7(high) CD4(+) T lymphocytes have been shown to be preferentially targeted by Human Immunodeficiency Virus-1 (HIV), and are implicated in HIV pathogenesis. Previous studies demonstrated that HIV envelope protein gp120 binds and signals through α4β7, and that this likely contributes to the infection of α4β7(high) T cells and promotes cell-to-cell virus transmission. Structures within the second variable loop (V2) of gp120, including the tripeptide motif LDV/I, are thought to mediate gp120-α4β7 binding...
August 16, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28810875/role-of-iqgap3-in-metastasis-and-epithelial-mesenchymal-transition-in-human-hepatocellular-carcinoma
#3
Yongjie Shi, Nan Qin, Qiang Zhou, Yanqiu Chen, Sicong Huang, Bo Chen, Gang Shen, Hongyun Jia
BACKGROUND: Hepatocellular carcinoma (HCC) is one of the most lethal cancers worldwide owing to its high rates of metastasis and recurrence. The oncogene IQ motif-containing GTPase activating protein 3 (IQGAP3) is ubiquitously overexpressed in several human cancers, including liver, ovary, lung, large intestine, gastric, bone marrow, and breast malignancies and is involved in the invasion and metastasis of cancer cells. Therefore, we aimed to determine the biological role and molecular mechanism of IQGAP3 in HCC...
August 15, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28801829/cloning-and-characterization-of-halomonas-elongata-l-asparaginase-a-promising-chemotherapeutic-agent
#4
Ali Ghasemi, Sedigheh Asad, Mahboubeh Kabiri, Bahareh Dabirmanesh
L-asparaginase has been used in the treatment of patients with acute lymphoblastic leukemia (ALL) for more than 30 years. Rapid clearance of the enzyme from blood stream and its L-glutaminase-dependent neurotoxicity has led to searching for new L-asparaginases with more desirable properties. In the present study, L-asparaginase coding gene of Halomonas elongata was isolated, expressed in Escherichia coli, purified, and characterized. The purified protein was found to have a molecular mass of 39.5 kDa and 1000-folds more activity towards L-asparagine than L-glutamine...
August 11, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28801067/dna-methylation-in-cho-cells
#5
Anna Wippermann, Thomas Noll
Chinese hamster ovary (CHO) cells account for the production of the majority of biopharmaceutical molecules - however, the molecular basis for their versatile properties is not entirely understood yet and the underlying cellular processes need to be characterized in detail. One such process that is supposed to contribute significantly to CHO cell phenotype is methylation of DNA at cytosine residues. DNA methylation was shown to be involved in several central biological processes in humans and to contribute to diseases like cancer...
August 8, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/28795589/a-novel-series-of-n-pyridin-2-yl-4-thiazol-5-yl-pyrimidin-2-amines-as-highly-potent-cdk4-6-inhibitors
#6
Solomon Tadesse, Ge Zhu, Laychiluh B Mekonnen, Jimma L Lenjisa, Mingfeng Yu, Michael P Brown, Shudong Wang
AIM: Inhibitors of CDK4/6 have emerged as a powerful class of therapeutics for treatment of several malignancies. We herein describe the identification of a new series of molecules that demonstrated excellent selectivity for CDK4/6 over CDKs1, 7 and 9. RESULTS: Medicinal chemistry optimization led to the discovery of 58 and 69 that inhibited CDK4 and CDK4/6, respectively, with high potency and selectivity, and 58 and 69 exhibited potent antiproliferative activities in a panel of human cancer cell lines including leukemia, and cancers of the breast, colon, ovary, pancreas and prostate...
August 10, 2017: Future Medicinal Chemistry
https://www.readbyqxmd.com/read/28793867/the-effect-of-nullomer-derived-peptides-9r-9s1r-and-124r-on-the-nci-60-panel-and-normal-cell-lines
#7
Abdelkrim Alileche, Greg Hampikian
BACKGROUND: Nullomer peptides are the smallest sequences absent from databases of natural proteins. We first began compiling a list of absent 5-amino acid strings in 2006 (1). We report here the effects of Nullomer-derived peptides 9R, 9S1R and 124R on the NCI-60 panel, derived from human cancers of 9 organs (kidney, ovary, skin melanoma, lung, brain, lung, colon, prostate and the hematopoietic system), and four normal cell lines (endothelial HUVEC, skin fibroblasts BJ, colon epithelial FHC and normal prostate RWPE-1)...
August 9, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28782224/prokineticin-1-is-up-regulated-by-insulin-in-decidualizing-human-endometrial-stromal-cells
#8
Dorina Ujvari, Ivika Jakson, Cecilia Oldmark, Sanaz Attarha, Twana Alkasalias, Daniel Salamon, Sebastian Gidlöf, Angelica Lindén Hirschberg
Prokineticin 1 (PROK1), a hypoxia-regulated angiogenic factor, has emerged as a crucial regulator of embryo implantation and placentation. Dysregulation of PROK1 has been linked to recurrent pregnancy loss, pre-eclampsia, foetal growth restriction and preterm birth. These pregnancy complications are common in women with obesity and polycystic ovary syndrome, i.e. conditions associated with insulin resistance and compensatory hyperinsulinaemia. We investigated the effect of insulin on PROK1 expression during in vitro decidualization...
August 7, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28780921/neo-oogenesis-in-mammals
#9
Tania Janeth Porras-Gómez, Norma Moreno-Mendoza
Recently, the existence of a mechanism for neo-oogenesis in the ovaries of adult mammals has generated much controversy within reproductive biology. This mechanism, which proposes that the ovary has cells capable of renewing the follicular reserve, has been described for various species of mammals. The first evidence was found in prosimians and humans. However, these findings were not considered relevant because the predominant dogma for reproductive biology at the time was that of Zuckerman. This dogma states that female mammals are born with finite numbers of oocytes that decline throughout postnatal life...
August 7, 2017: Zygote: the Biology of Gametes and Early Embryos
https://www.readbyqxmd.com/read/28776263/age-and-ischemia-differentially-impact-mitochondrial-ultrastructure-and-function-in-a-novel-model-of-age-associated-estrogen-deficiency-in-the-female-rat-heart
#10
Alexandra M Garvin, Nicole C Aurigemma, Jenna L Hackenberger, Donna H Korzick
Altered mitochondrial respiration, morphology, and quality control collectively contribute to mitochondrial dysfunction in the aged heart. Because myocardial infarction remains the leading cause of death in aged women, the present study utilized a novel rodent model to recapitulate human menopause to interrogate the combination of age and estrogen deficiency on mitochondrial ultrastructure and function with cardiac ischemia/reperfusion (I/R) injury. Female F344 rats were ovariectomized (OVX) at 15 months and studied at 24 months (MO OVX; n = 40) vs adult ovary intact (6 months; n = 41)...
August 4, 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/28775133/italian-pool-of-asbestos-workers-cohorts-mortality-trends-of-asbestos-related-neoplasms-after-long-time-since-first-exposure
#11
Daniela Ferrante, Elisabetta Chellini, Enzo Merler, Venere Pavone, Stefano Silvestri, Lucia Miligi, Giuseppe Gorini, Vittoria Bressan, Paolo Girardi, Laura Ancona, Elisa Romeo, Ferdinando Luberto, Orietta Sala, Corrado Scarnato, Simona Menegozzo, Enrico Oddone, Sara Tunesi, Patrizia Perticaroli, Aldo Pettinari, Francesco Cuccaro, Stefano Mattioli, Antonio Baldassarre, Francesco Barone-Adesi, Tiziana Cena, Patrizia Legittimo, Alessandro Marinaccio, Dario Mirabelli, Marina Musti, Roberta Pirastu, Alessandra Ranucci, Corrado Magnani
OBJECTIVE: Asbestos is a known human carcinogen, with evidence for malignant mesothelioma (MM), cancers of lung, ovary, larynx and possibly other organs. MM rates are predicted to increase with a power of time since first exposure (TSFE), but the possible long-term attenuation of the trend is debated. The asbestos ban enforced in Italy in 1992 gives an opportunity to measure long-term cancer risk in formerly exposed workers. METHODS: Pool of 43 previously studied Italian asbestos cohorts (asbestos cement, rolling stock, shipbuilding), with mortality follow-up updated to 2010...
August 3, 2017: Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/28774621/zebrafish-embryo-toxicity-of-15-chlorinated-brominated-and-iodinated-disinfection-by-products
#12
David Hanigan, Lisa Truong, Michael Simonich, Robert Tanguay, Paul Westerhoff
Disinfection to protect human health occurs at drinking water and wastewater facilities through application of non-selective oxidants including chlorine. Oxidants also transform organic material and form disinfection by-products (DBPs), many of which are halogenated and cyto- and genotoxic. Only a handful of assays have been used to compare DBP toxicity, and researchers are unsure which DBP(s) drive the increased cancer risk associated with drinking chlorinated water. The most extensive data set employs an in vitro model cell, Chinese hamster ovary cells...
August 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28774614/investigation-of-nuclear-enzyme-topoisomerase-as-a-putative-molecular-target-of-monohaloacetonitrile-disinfection-by-products
#13
Yukako Komaki, Michael J Plewa
Disinfection by-products occur widely as the unintended effect of water disinfection and are associated with toxicity and adverse human health effects. Yet the molecular mechanisms of their toxicity are not well understood. To investigate the molecular basis of hyperploidy induction by monohaloacetonitriles, the interaction of monohaloacetonitriles with topoisomerase II in Chinese hamster ovary cells was examined. We showed a concentration-dependent inhibition of DNA decatenation activity of topoisomerase under acellular conditions while in vitro monohaloacetonitrile treatment expressed mixed results...
August 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28762556/nadph-oxidase-5-nox5-induced-reactive-oxygen-signaling-modulates-normoxic-hif-1%C3%AE-and-p27-kip1-expression-in-malignant-melanoma-and-other-human-tumors
#14
Smitha Antony, Guojian Jiang, Yongzhong Wu, Jennifer L Meitzler, Hala R Makhlouf, Diana C Haines, Donna Butcher, Dave S Hoon, Jiuping Ji, Yiping Zhang, Agnes Juhasz, Jiamo Lu, Han Liu, Iris Dahan, Mariam Konate, Krishnendu K Roy, James H Doroshow
NADPH oxidase 5 (NOX5) generated reactive oxygen species (ROS) have been implicated in signaling cascades that regulate cancer cell proliferation. To evaluate and validate NOX5 expression in human tumors, we screened a broad range of tissue microarrays (TMAs), and report substantial overexpression of NOX5 in malignant melanoma and cancers of the prostate, breast, and ovary. In human UACC-257 melanoma cells that possesses high levels of functional endogenous NOX5, overexpression of NOX5 resulted in enhanced cell growth, increased numbers of BrdU positive cells, and increased γ-H2AX levels...
August 1, 2017: Molecular Carcinogenesis
https://www.readbyqxmd.com/read/28758928/role-of-plasminogen-activator-inhibitor-type-1-in-pathologies-of-female-reproductive-diseases
#15
REVIEW
Yao Ye, Aurelia Vattai, Xi Zhang, Junyan Zhu, Christian J Thaler, Sven Mahner, Udo Jeschke, Viktoria von Schönfeldt
Normal pregnancy is a state of hypercoagulability with diminishing fibrinolytic activity, which is mainly caused by an increase of plasminogen activator inhibitor type 1 (PAI-1). PAI-1 is the main inhibitor of plasminogen activators, including tissue-type plasminogen activator (tPA) and urokinase-type plasminogen activator (uPA). In human placentas, PAI-1 is expressed in extravillous interstitial trophoblasts and vascular trophoblasts. During implantation and placentation, PAI-1 is responsible for inhibiting extra cellular matrix (ECM) degradation, thereby causing an inhibition of trophoblasts invasion...
July 29, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28755863/estrogenic-regulation-of-memory-consolidation-a-look-beyond-the-hippocampus-ovaries-and-females
#16
Karyn M Frick, Jennifer J Tuscher, Wendy A Koss, Jaekyoon Kim, Lisa R Taxier
The potent estrogen 17β-estradiol (E2) has long been known to regulate the hippocampus and hippocampal-dependent memories in females, and research from the past decade has begun to shed light on the molecular mechanisms through which E2 mediates memory formation in females. Although E2 can also regulate hippocampal function in males, relatively little is known about how E2 influences memory formation in males, or whether sex differences in underlying mechanisms exist. This review, based on a talk given in April 2017 at the American University symposium entitled, "Sex Differences: From Neuroscience to the Clinic and Beyond", first provides an overview of the molecular mechanisms in the dorsal hippocampus through which E2 enhances memory consolidation in ovariectomized female mice...
July 26, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28754128/does-air-pollution-play-a-role-in-infertility-a-systematic-review
#17
REVIEW
Julie Carré, Nicolas Gatimel, Jessika Moreau, Jean Parinaud, Roger Léandri
BACKGROUND: Air pollution is involved in many pathologies. These pollutants act through several mechanisms that can affect numerous physiological functions, including reproduction: as endocrine disruptors or reactive oxygen species inducers, and through the formation of DNA adducts and/or epigenetic modifications. We conducted a systematic review of the published literature on the impact of air pollution on reproductive function. Eligible studies were selected from an electronic literature search from the PUBMED database from January 2000 to February 2016 and associated references in published studies...
July 28, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/28753556/inflammation-and-stem-markers-association-to-pim1-pim2-kinase-induced-tumors-in-breast-and-uterus
#18
Manuel-Pedro Jiménez-García, Antonio Lucena-Cacace, María-José Robles-Frías, Irene Ferrer, Maja Narlik-Grassow, Carmen Blanco-Aparicio, Amancio Carnero
The PIM family of Ser/Thr kinase proteins has been implicated in tumorigenesis at different levels. PIM proteins are overexpressed in several tumor types and have been associated with chemoresistance. However, their role in hormone-dependent female tissues has not been explored, especially in the uterus, breast and ovary. We generated conditional transgenic mice with confined expression of human PIM1 or PIM2 genes in these tissues. We characterized the tumoral response to these genetic alterations corroborating their role as oncogenes since they induce hyperproliferation in all tissues and tumors in mammary gland and uterus...
July 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28750654/different-therapeutic-effects-of-cells-derived-from-human-amniotic-membrane-on-premature-ovarian-aging-depend-on-distinct-cellular-biological-characteristics
#19
Chenyue Ding, Hong Li, Yun Wang, Fuxin Wang, Huihua Wu, Rulei Chen, Jinghuan Lv, Wei Wang, Boxian Huang
BACKGROUND: Many reports have shown that various kinds of stem cells have the ability to recover premature ovarian aging (POA) function. Transplantation of human amniotic epithelial cells (hAECs) improves ovarian function damaged by chemotherapy in a mice model. Understanding of how to evaluate the distinct effects of adult stem cells in curing POA and how to choose stem cells in clinical application is lacking. METHODS: To build a different degrees of POA model, mice were administered different doses of cyclophosphamide: light dose (70 mg/kg, 2 weeks), medium dose (70 mg/kg, 1 week; 120 mg/kg, 1 week), and high dose (120 mg/kg, 2 weeks)...
July 27, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28750635/proteomic-analysis-of-human-follicular-fluid-associated-with-successful-in-vitro-fertilization
#20
Xiaofang Shen, Xin Liu, Peng Zhu, Yuhua Zhang, Jiahui Wang, Yanwei Wang, Wenting Wang, Juan Liu, Ning Li, Fujun Liu
BACKGROUND: Human follicular fluid (HFF) provides a key environment for follicle development and oocyte maturation, and contributes to oocyte quality and in vitro fertilization (IVF) outcome. METHODS: To better understand folliculogenesis in the ovary, a proteomic strategy based on dual reverse phase high performance liquid chromatography (RP-HPLC) coupled to matrix-assisted laser desorption/ionization time-of-flight tandem mass spectrometry (LC-MALDI TOF/TOF MS) was used to investigate the protein profile of HFF from women undergoing successful IVF...
July 27, 2017: Reproductive Biology and Endocrinology: RB&E
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