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  • 1
    Publication Date: 2010-03-05
    Description: The presence of hundreds of copies of mitochondrial DNA (mtDNA) in each human cell poses a challenge for the complete characterization of mtDNA genomes by conventional sequencing technologies. Here we describe digital sequencing of mtDNA genomes with the use of massively parallel sequencing-by-synthesis approaches. Although the mtDNA of human cells is considered to be homogeneous, we found widespread heterogeneity (heteroplasmy) in the mtDNA of normal human cells. Moreover, the frequency of heteroplasmic variants varied considerably between different tissues in the same individual. In addition to the variants identified in normal tissues, cancer cells harboured further homoplasmic and heteroplasmic mutations that could also be detected in patient plasma. These studies provide insights into the nature and variability of mtDNA sequences and have implications for mitochondrial processes during embryogenesis, cancer biomarker development and forensic analysis. In particular, they demonstrate that individual humans are characterized by a complex mixture of related mitochondrial genotypes rather than a single genotype.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3176451/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3176451/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉He, Yiping -- Wu, Jian -- Dressman, Devin C -- Iacobuzio-Donahue, Christine -- Markowitz, Sanford D -- Velculescu, Victor E -- Diaz, Luis A Jr -- Kinzler, Kenneth W -- Vogelstein, Bert -- Papadopoulos, Nickolas -- CA 43460/CA/NCI NIH HHS/ -- CA 62924/CA/NCI NIH HHS/ -- CA121113/CA/NCI NIH HHS/ -- CA57345/CA/NCI NIH HHS/ -- P50 CA062924/CA/NCI NIH HHS/ -- P50 CA062924-06/CA/NCI NIH HHS/ -- R01 CA057345/CA/NCI NIH HHS/ -- R01 CA057345-08/CA/NCI NIH HHS/ -- R01 CA121113/CA/NCI NIH HHS/ -- R01 CA121113-04/CA/NCI NIH HHS/ -- R37 CA043460/CA/NCI NIH HHS/ -- R37 CA043460-16/CA/NCI NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2010 Mar 25;464(7288):610-4. doi: 10.1038/nature08802. Epub 2010 Mar 3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Ludwig Center for Cancer Genetics and Therapeutics and The Howard Hughes Medical Institute at The Johns Hopkins Kimmel Cancer Center, Baltimore, Maryland 21231, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20200521" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Aged ; Child ; Colorectal Neoplasms/*pathology ; DNA, Mitochondrial/blood/*genetics ; Female ; Gene Frequency ; *Genetic Heterogeneity ; Genetic Variation ; Genotype ; Humans ; Intestinal Mucosa/cytology/pathology ; Male ; Middle Aged ; Mutation/*genetics
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 2014-07-11
    Description: Human pluripotent stem cells hold potential for regenerative medicine, but available cell types have significant limitations. Although embryonic stem cells (ES cells) from in vitro fertilized embryos (IVF ES cells) represent the 'gold standard', they are allogeneic to patients. Autologous induced pluripotent stem cells (iPS cells) are prone to epigenetic and transcriptional aberrations. To determine whether such abnormalities are intrinsic to somatic cell reprogramming or secondary to the reprogramming method, genetically matched sets of human IVF ES cells, iPS cells and nuclear transfer ES cells (NT ES cells) derived by somatic cell nuclear transfer (SCNT) were subjected to genome-wide analyses. Both NT ES cells and iPS cells derived from the same somatic cells contained comparable numbers of de novo copy number variations. In contrast, DNA methylation and transcriptome profiles of NT ES cells corresponded closely to those of IVF ES cells, whereas iPS cells differed and retained residual DNA methylation patterns typical of parental somatic cells. Thus, human somatic cells can be faithfully reprogrammed to pluripotency by SCNT and are therefore ideal for cell replacement therapies.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ma, Hong -- Morey, Robert -- O'Neil, Ryan C -- He, Yupeng -- Daughtry, Brittany -- Schultz, Matthew D -- Hariharan, Manoj -- Nery, Joseph R -- Castanon, Rosa -- Sabatini, Karen -- Thiagarajan, Rathi D -- Tachibana, Masahito -- Kang, Eunju -- Tippner-Hedges, Rebecca -- Ahmed, Riffat -- Gutierrez, Nuria Marti -- Van Dyken, Crystal -- Polat, Alim -- Sugawara, Atsushi -- Sparman, Michelle -- Gokhale, Sumita -- Amato, Paula -- Wolf, Don P -- Ecker, Joseph R -- Laurent, Louise C -- Mitalipov, Shoukhrat -- Howard Hughes Medical Institute/ -- England -- Nature. 2014 Jul 10;511(7508):177-83. doi: 10.1038/nature13551. Epub 2014 Jul 2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Center for Embryonic Cell and Gene Therapy, Oregon Health & Science University, 3303 Southwest Bond Avenue, Portland, Oregon 97239, USA [2] Division of Reproductive and Developmental Sciences, Oregon National Primate Research Center, Oregon Health & Science University, 505 Northwest 185th Avenue, Beaverton, Oregon 97006, USA [3]. ; 1] Department of Reproductive Medicine, University of California, San Diego, Sanford Consortium for Regenerative Medicine, 2880 Torrey Pines Scenic Drive, La Jolla, California 92037, USA [2]. ; 1] Genomic Analysis Laboratory, the Salk Institute for Biological Studies, La Jolla, California 92037, USA [2] Bioinformatics Program, University of California at San Diego, La Jolla, California 92093, USA. ; 1] Center for Embryonic Cell and Gene Therapy, Oregon Health & Science University, 3303 Southwest Bond Avenue, Portland, Oregon 97239, USA [2] Division of Reproductive and Developmental Sciences, Oregon National Primate Research Center, Oregon Health & Science University, 505 Northwest 185th Avenue, Beaverton, Oregon 97006, USA. ; Genomic Analysis Laboratory, the Salk Institute for Biological Studies, La Jolla, California 92037, USA. ; Department of Reproductive Medicine, University of California, San Diego, Sanford Consortium for Regenerative Medicine, 2880 Torrey Pines Scenic Drive, La Jolla, California 92037, USA. ; 1] Division of Reproductive and Developmental Sciences, Oregon National Primate Research Center, Oregon Health & Science University, 505 Northwest 185th Avenue, Beaverton, Oregon 97006, USA [2] Department of Obstetrics and Gynecology, South Miyagi Medical Center, Shibata-gun, Miyagi 989-1253, Japan (M.T.); Department of Cell and Molecular Biology, Karolinska Institutet, SE-17177 Stockholm, Sweden (A.P.). ; Division of Reproductive and Developmental Sciences, Oregon National Primate Research Center, Oregon Health & Science University, 505 Northwest 185th Avenue, Beaverton, Oregon 97006, USA. ; University Pathologists LLC, Boston University School of Medicine, Roger Williams Medical Center, Providence, Rhode Island 02118, USA. ; Division of Reproductive Endocrinology, Department of Obstetrics and Gynecology, Oregon Health & Science University, 3181 Southwest Sam Jackson Park Road, Portland, Oregon 97239, USA. ; 1] Genomic Analysis Laboratory, the Salk Institute for Biological Studies, La Jolla, California 92037, USA [2] Howard Hughes Medical Institute, the Salk Institute for Biological Studies, La Jolla, California 92037, USA. ; 1] Center for Embryonic Cell and Gene Therapy, Oregon Health & Science University, 3303 Southwest Bond Avenue, Portland, Oregon 97239, USA [2] Division of Reproductive and Developmental Sciences, Oregon National Primate Research Center, Oregon Health & Science University, 505 Northwest 185th Avenue, Beaverton, Oregon 97006, USA [3] Division of Reproductive Endocrinology, Department of Obstetrics and Gynecology, Oregon Health & Science University, 3181 Southwest Sam Jackson Park Road, Portland, Oregon 97239, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25008523" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; *Cellular Reprogramming ; Chromosome Aberrations ; Chromosomes, Human, X/genetics/metabolism ; DNA Copy Number Variations ; DNA Methylation ; Genome-Wide Association Study ; Genomic Imprinting ; Humans ; Nuclear Transfer Techniques/standards ; Pluripotent Stem Cells/cytology/*metabolism ; Transcriptome
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 3
    Publication Date: 2011-09-06
    Description: PPARgamma is the functioning receptor for the thiazolidinedione (TZD) class of antidiabetes drugs including rosiglitazone and pioglitazone. These drugs are full classical agonists for this nuclear receptor, but recent data have shown that many PPARgamma-based drugs have a separate biochemical activity, blocking the obesity-linked phosphorylation of PPARgamma by Cdk5. Here we describe novel synthetic compounds that have a unique mode of binding to PPARgamma, completely lack classical transcriptional agonism and block the Cdk5-mediated phosphorylation in cultured adipocytes and in insulin-resistant mice. Moreover, one such compound, SR1664, has potent antidiabetic activity while not causing the fluid retention and weight gain that are serious side effects of many of the PPARgamma drugs. Unlike TZDs, SR1664 also does not interfere with bone formation in culture. These data illustrate that new classes of antidiabetes drugs can be developed by specifically targeting the Cdk5-mediated phosphorylation of PPARgamma.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3179551/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3179551/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Choi, Jang Hyun -- Banks, Alexander S -- Kamenecka, Theodore M -- Busby, Scott A -- Chalmers, Michael J -- Kumar, Naresh -- Kuruvilla, Dana S -- Shin, Youseung -- He, Yuanjun -- Bruning, John B -- Marciano, David P -- Cameron, Michael D -- Laznik, Dina -- Jurczak, Michael J -- Schurer, Stephan C -- Vidovic, Dusica -- Shulman, Gerald I -- Spiegelman, Bruce M -- Griffin, Patrick R -- 1RC4DK090861/DK/NIDDK NIH HHS/ -- DK31405/DK/NIDDK NIH HHS/ -- R01 DK040936/DK/NIDDK NIH HHS/ -- R01 GM084041/GM/NIGMS NIH HHS/ -- R01 GM084041-03/GM/NIGMS NIH HHS/ -- R01-GM084041/GM/NIGMS NIH HHS/ -- R37 DK031405/DK/NIDDK NIH HHS/ -- R37 DK031405-30/DK/NIDDK NIH HHS/ -- R37 DK031405-31/DK/NIDDK NIH HHS/ -- RC4 DK090861/DK/NIDDK NIH HHS/ -- RC4 DK090861-01/DK/NIDDK NIH HHS/ -- S10 RR027270/RR/NCRR NIH HHS/ -- U24 DK059635/DK/NIDDK NIH HHS/ -- U54 MH074404/MH/NIMH NIH HHS/ -- U54 MH074404-01/MH/NIMH NIH HHS/ -- U54-MH074404/MH/NIMH NIH HHS/ -- Howard Hughes Medical Institute/ -- Intramural NIH HHS/ -- England -- Nature. 2011 Sep 4;477(7365):477-81. doi: 10.1038/nature10383.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cancer Biology and Division of Metabolism and Chronic Disease, Dana-Farber Cancer Institute and Department of Cell Biology, Harvard Medical School, Boston, Massachusetts 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21892191" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3-L1 Cells ; Adipocytes/drug effects/metabolism ; Adipose Tissue, White/drug effects/metabolism ; Animals ; Biphenyl Compounds/chemistry/pharmacology ; Body Fluids/drug effects ; COS Cells ; Cercopithecus aethiops ; Cyclin-Dependent Kinase 5/*antagonists & inhibitors ; Dietary Fats/pharmacology ; Disease Models, Animal ; Dose-Response Relationship, Drug ; HEK293 Cells ; Humans ; Hypoglycemic Agents/adverse effects/chemistry/*pharmacology ; Ligands ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Obese ; Models, Molecular ; Obesity/chemically induced/metabolism ; Osteogenesis/drug effects ; PPAR gamma/agonists/chemistry/*metabolism ; Phosphorylation/drug effects ; Phosphoserine/metabolism ; Thiazolidinediones/adverse effects/pharmacology ; Transcription, Genetic/drug effects ; Tumor Necrosis Factor-alpha/pharmacology ; Weight Gain/drug effects
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 4
    Publication Date: 2012-12-12
    Description: Touch sensation is essential for behaviours ranging from environmental exploration to social interaction; however, the underlying mechanisms are largely unknown. In Drosophila larvae, two types of sensory neurons, class III and class IV dendritic arborization neurons, tile the body wall. The mechanotransduction channel PIEZO in class IV neurons is essential for sensing noxious mechanical stimuli but is not involved in gentle touch. On the basis of electrophysiological-recording, calcium-imaging and behavioural studies, here we report that class III dendritic arborization neurons are touch sensitive and contribute to gentle-touch sensation. We further identify NOMPC (No mechanoreceptor potential C), a member of the transient receptor potential (TRP) family of ion channels, as a mechanotransduction channel for gentle touch. NOMPC is highly expressed in class III neurons and is required for their mechanotransduction. Moreover, ectopic NOMPC expression confers touch sensitivity to the normally touch-insensitive class IV neurons. In addition to the critical role of NOMPC in eliciting gentle-touch-mediated behavioural responses, expression of this protein in the Drosophila S2 cell line also gives rise to mechanosensitive channels in which ion selectivity can be altered by NOMPC mutation, indicating that NOMPC is a pore-forming subunit of a mechanotransduction channel. Our study establishes NOMPC as a bona fide mechanotransduction channel that satisfies all four criteria proposed for a channel to qualify as a transducer of mechanical stimuli and mediates gentle-touch sensation. Our study also suggests that different mechanosensitive channels may be used to sense gentle touch versus noxious mechanical stimuli.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3917554/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3917554/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yan, Zhiqiang -- Zhang, Wei -- He, Ye -- Gorczyca, David -- Xiang, Yang -- Cheng, Li E -- Meltzer, Shan -- Jan, Lily Yeh -- Jan, Yuh Nung -- 5R01MH084234/MH/NIMH NIH HHS/ -- P30 DK063720/DK/NIDDK NIH HHS/ -- R01 MH084234/MH/NIMH NIH HHS/ -- R37 NS040929/NS/NINDS NIH HHS/ -- R37NS040929/NS/NINDS NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2013 Jan 10;493(7431):221-5. doi: 10.1038/nature11685. Epub 2012 Dec 9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Department of Physiology, University of California, San Francisco, San Francisco, California 94158, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23222543" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Cell Line ; Dendrites/physiology ; Drosophila Proteins/chemistry/genetics/*metabolism ; Drosophila melanogaster/cytology/growth & development/*physiology ; Larva/cytology/physiology ; Mechanotransduction, Cellular/*physiology ; Molecular Sequence Data ; Mutation ; Protein Subunits/chemistry/genetics/*metabolism ; Sequence Alignment ; Touch/*physiology ; Transient Receptor Potential Channels/chemistry/genetics/*metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 5
    Publication Date: 2013-09-21
    Description: Opioid receptor antagonists increase hyperalgesia in humans and animals, which indicates that endogenous activation of opioid receptors provides relief from acute pain; however, the mechanisms of long-term opioid inhibition of pathological pain have remained elusive. We found that tissue injury produced mu-opioid receptor (MOR) constitutive activity (MOR(CA)) that repressed spinal nociceptive signaling for months. Pharmacological blockade during the posthyperalgesia state with MOR inverse agonists reinstated central pain sensitization and precipitated hallmarks of opioid withdrawal (including adenosine 3',5'-monophosphate overshoot and hyperalgesia) that required N-methyl-D-aspartate receptor activation of adenylyl cyclase type 1. Thus, MOR(CA) initiates both analgesic signaling and a compensatory opponent process that generates endogenous opioid dependence. Tonic MOR(CA) suppression of withdrawal hyperalgesia may prevent the transition from acute to chronic pain.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4440417/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4440417/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Corder, G -- Doolen, S -- Donahue, R R -- Winter, M K -- Jutras, B L -- He, Y -- Hu, X -- Wieskopf, J S -- Mogil, J S -- Storm, D R -- Wang, Z J -- McCarson, K E -- Taylor, B K -- 5K02DA19656/DA/NIDA NIH HHS/ -- F31 DA032496/DA/NIDA NIH HHS/ -- F31DA032496/DA/NIDA NIH HHS/ -- HD02528/HD/NICHD NIH HHS/ -- K02 DA019656/DA/NIDA NIH HHS/ -- P30 HD002528/HD/NICHD NIH HHS/ -- R01 NS045954/NS/NINDS NIH HHS/ -- R01NS45954/NS/NINDS NIH HHS/ -- UL1 TR000117/TR/NCATS NIH HHS/ -- New York, N.Y. -- Science. 2013 Sep 20;341(6152):1394-9. doi: 10.1126/science.1239403.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiology, University of Kentucky, Lexington, KY 40536, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24052307" target="_blank"〉PubMed〈/a〉
    Keywords: Acute Pain/metabolism ; Adenosine Monophosphate/metabolism ; Adenylyl Cyclases/metabolism ; Animals ; Chronic Pain/*metabolism ; Disease Models, Animal ; Freund's Adjuvant/pharmacology ; Hyperalgesia/chemically induced/*metabolism ; Isoflurane/pharmacology ; Male ; Mice ; Naltrexone/analogs & derivatives/pharmacology ; Nociceptive Pain/*metabolism ; Receptors, N-Methyl-D-Aspartate/metabolism ; Receptors, Opioid, mu/agonists/antagonists & inhibitors/*metabolism ; Spinal Cord/drug effects/metabolism ; Substance Withdrawal Syndrome/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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