ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 550 - Earth sciences  (9)
  • Life Sciences (General)  (9)
  • Analytical Chemistry and Spectroscopy
  • Life and Medical Sciences
  • Mutation
  • 1995-1999  (25)
  • 1996  (25)
  • 1
    facet.materialart.
    Unknown
    Identification of a TAAT-containing motif required for high level expression of the COL1A1 promoter in differentiated osteoblasts of transgenic mice (1996)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Our previous studies have shown that the 49-base pair region of promoter DNA between -1719 and -1670 base pairs is necessary for transcription of the rat COL1A1 gene in transgenic mouse calvariae. In this study, we further define this element to the 13-base pair region between -1683 and -1670. This element contains a TAAT motif that binds homeodomain-containing proteins. Site-directed mutagenesis of this element in the context of a COL1A1-chloramphenicol acetyltransferase construct extending to -3518 base pairs decreased the ratio of reporter gene activity in calvariae to tendon from 3:1 to 1:1, suggesting a preferential effect on activity in calvariae. Moreover, chloramphenicol acetyltransferase-specific immunofluorescence microscopy of transgenic calvariae showed that the mutation preferentially reduced levels of chloramphenicol acetyltransferase protein in differentiated osteoblasts. Gel mobility shift assays demonstrate that differentiated osteoblasts contain a nuclear factor that binds to this site. This binding activity is not present in undifferentiated osteoblasts. We show that Msx2, a homeodomain protein, binds to this motif; however, Northern blot analysis revealed that Msx2 mRNA is present in undifferentiated bone cells but not in fully differentiated osteoblasts. In addition, cotransfection studies in ROS 17/2.8 osteosarcoma cells using an Msx2 expression vector showed that Msx2 inhibits a COL1A1 promoter-chloramphenicol acetyltransferase construct. Our results suggest that high COL1A1 expression in bone is mediated by a protein that is induced during osteoblast differentiation. This protein may contain a homeodomain; however, it is distinct from homeodomain proteins reported previously to be present in bone.
    Keywords: Life Sciences (General)
    Type: The Journal of biological chemistry (ISSN 0021-9258); 271; 27; 16422-9
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 2
    Electronic Resource
    Electronic Resource
    Chondrocyte cultures express matrix metalloproteinase mRNA and immunoreactive protein; stromelysin-1 and 72 kDa gelatinase are localized in extracellular matrix vesicles (1996)
    New York, N.Y. : Wiley-Blackwell
    Journal of Cellular Biochemistry 61 (1996), S. 375-391 
    Details
    ISSN: 0730-2312
    Keywords: metalloproteinases ; growth plate cartilage ; chondrocytes ; matrix vesicles ; RT-PCR ; zymography ; stromelysin-1 ; 72 kDa gelatinase ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Previous studies have shown that costochondral cartilage cell cultures produce extracellular matrix vesicles which contain metalloproteinase activity. In the present study, we examined whether two matrix metalloproteinases (MMPs) known to be present in cartilage, stromelysin-1 and 72 kDa gelatinase, are expressed by fourth passage resting zone and growth zone costochondral chondrocytes and whether they are specifically incorporated into matrix vesicles produced by the cells. We also examined whether the cells synthesize tissue inhibitor of metalloproteinase-1 and -2 (TIMP-1 and TIMP-2). Oligonucleotide primers for stromelysin-1, 72 kDa gelatinase, tissue inhibitor of metalloproteinases-1 and -2 (TIMP-1 and TIMP-2), and GAPDH were synthesized and optimized for use in the reverse transcription-polymerase chain reaction (RT-PCR). It was found that both resting zone and growth zone chondrocytes produced mRNA for both MMPs and the two TIMPs. Further, immunostaining of cell layers with antibodies to 72 kDa gelatinase and stromelysin-1 showed that both cell types produced these MMPs in culture. Substrate gel electrophoresis and Western analysis were used to characterize MMP activity in matrix vesicles, media vesicles, or plasma membranes as well as in conditioned media produced by the chondrocyte cultures. It was found that matrix vesicles but not plasma membranes or media vesicles were selectively enriched in stromelysin-1. Also, 72 kDA gelatinase was found in matrix vesicles, but to a lesser extent than seen in media vesicles. The relative activity of each enzyme detected was cell maturation-dependent. No MMP activity was detected in conditioned media produced by either cell type. The results of this study show that MMPs are expressed by resting zone and growth zone chondrocytes in culture and differentially distributed among three different membrane compartments. This suggests that, in addition to the well-known activators and inhibitors of MMP activity in the matrix, differential membrane distribution may enable more precise control over the site, rate, and extent of matrix degradation by the cell. © 1996 Wiley-Liss, Inc.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 3
    Electronic Resource
    Electronic Resource
    Pressure-tuning fourier transform infrared spectroscopic study of carcinogenesis in human endometrium (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Biospectroscopy 2 (1996), S. 155-165 
    Details
    ISSN: 1075-4261
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Physics
    Notes: Fourier-transform infrared spectra were obtained from the endometrial tissues from 17 females. Thirteen of them had grade I (well differentiated) endometrial adenocarcinoma and four of them had grade III (poorly differentiated) adenocarcinoma. The infrared spectra of the corresponding normal tissues obtained from 1-3 cm away from the tumor were also measured. The spectra of all the normal tissues were essentially identical and differed from those obtained from both the grade I and grade III adenocarcinomas. In order to determine the structural changes at the molecular level, infrared spectra and their pressure dependences of the exfoliated epithelial cells from the normal and grade III adenocarcinoma tissues of the endometrium were studied. Changes in the spectra of malignant samples were observed in the symmetric and asymmetric stretching bands of the phosphodiester backbones of nucleic acids, the CH stretching region, the C(SINGLE BOND)O stretching bands of the C(SINGLE BOND)OH groups of carbohydrates and cellular protein residuals, and the pressure dependence of the CH2 stretching mode. These spectral changes in the malignant endometrium are reproducible and are the result of the structural changes involving an increase in the nuclear size, in the number of hydrogen-bonded phosphodiester groups in DNA, in the intermolecular interaction and packing in nucleic acids, in the conformational and reorientational disorder in the methylene chains of membrane lipids, changes in the membrane fluidity, as well as a decrease in the methyl-to-methylene ratio, and in the number of hydrogen-bonded C(SINGLE BOND)OH groups in carbohydrates and protein residuals. It was also found for the first time from the present work that the epithelium in the normal endometrium exhibits unique structural properties compared with the epithelium of other normal human tissues. © 1996 John Wiley & Sons, Inc.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 4
    Electronic Resource
    Electronic Resource
    Supercritical fluid extraction of essential oils from the fruits of Archangelica off. Hoffm. and their characterization by GC/MS (1996)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 19 (1996), S. 237-240 
    Details
    ISSN: 0935-6304
    Keywords: Supercritical fluid extraction ; GC/MS and GC/FID ; Essential oils ; Optimization of isolation from Archangelica off. Hoffm. ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240190416
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Brain POU-er (1996)
    New York, NY : Wiley-Blackwell
    BioEssays 18 (1996), S. 347-350 
    Details
    ISSN: 0265-9247
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Developmental coordination is vital in the temporally coordinated appearance of cell types within the precise spatial architecture of the vertebrate brain and this, combined with the rich interplay between the developing brain and its target organs, is a biological problem of monumental complexity. An example is the genesis and subsequent integration of the neuroendocrine hypothalamus and the pituitary. Two recent papers(1,2) use the developing hypothalamo-pituitary axis in order to gather a deeper understanding of these integrative mechanisms. In addition, they show that a sub-family of homeodomain factors, the POU-domain proteins, play a critical role in coordinating the respective ontogenies of the hypothalamus and the pituitary.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bies.950180503
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    facet.materialart.
    Unknown
    Enhanced fidelity of 3TC-selected mutant HIV-1 reverse transcriptase (1996)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1996-03-01
    Description: Monotherapy with (-)2',3'-dideoxy-3'-thiacytidine (3TC) leads to the appearance of a drug-resistant variant of human immunodeficiency virus-type 1 (HIV-1) with the methionine-184 --〉 valine (M184V) substitution in the reverse transcriptase (RT). Despite resulting drug resistance, treatment for more than 48 weeks is associated with a lower plasma viral burden than that at baseline. Studies to investigate this apparent contradiction revealed the following. (i) Titers of HIV-neutralizing antibodies remained stable in 3TC-treated individuals in contrast to rapid declines in those treated with azidothymidine (AZT). (ii) Unlike wild-type HIV, growth of M184V HIV in cell culture in the presence of d4T, AZT, Nevirapine, Delavirdine, or Saquinavir did not select for variants displaying drug resistance. (iii) There was an increase in fidelity of nucleotide insertion by the M184V mutant compared with wild-type enzyme.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wainberg, M A -- Drosopoulos, W C -- Salomon, H -- Hsu, M -- Borkow, G -- Parniak, M -- Gu, Z -- Song, Q -- Manne, J -- Islam, S -- Castriota, G -- Prasad, V R -- P30 AI-27741/AI/NIAID NIH HHS/ -- R01 AI0-30861/AI/NIAID NIH HHS/ -- UO1AI-24845/AI/NIAID NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1996 Mar 1;271(5253):1282-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉McGill AIDS Centre, Jewish General Hospital, Montreal, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8638110" target="_blank"〉PubMed〈/a〉
    Keywords: Antiviral Agents/*pharmacology/therapeutic use ; Base Composition ; Base Sequence ; Deoxyribonucleotides/metabolism ; Drug Resistance, Microbial ; HIV Antibodies/blood/immunology ; HIV Infections/drug therapy/*virology ; HIV Protease Inhibitors/pharmacology ; HIV Reverse Transcriptase ; HIV-1/drug effects/*enzymology/genetics/immunology/physiology ; Humans ; Isoquinolines/pharmacology ; Lamivudine ; Molecular Sequence Data ; Mutation ; Neutralization Tests ; Quinolines/pharmacology ; RNA-Directed DNA Polymerase/drug effects/*genetics/metabolism ; Reverse Transcriptase Inhibitors/*pharmacology/therapeutic use ; Saquinavir ; Virus Replication/drug effects ; Zalcitabine/*analogs & derivatives/pharmacology/therapeutic use
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 7
    facet.materialart.
    Unknown
    RAG mutations in human B cell-negative SCID (1996)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1996-10-04
    Description: Patients with human severe combined immunodeficiency (SCID) can be divided into those with B lymphocytes (B+ SCID) and those without (B- SCID). Although several genetic causes are known for B+ SCID, the etiology of B- SCID has not been defined. Six of 14 B- SCID patients tested were found to carry a mutation of the recombinase activating gene 1 (RAG-1), RAG-2, or both. This mutation resulted in a functional inability to form antigen receptors through genetic recombination and links a defect in one of the site-specific recombination systems to a human disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schwarz, K -- Gauss, G H -- Ludwig, L -- Pannicke, U -- Li, Z -- Lindner, D -- Friedrich, W -- Seger, R A -- Hansen-Hagge, T E -- Desiderio, S -- Lieber, M R -- Bartram, C R -- New York, N.Y. -- Science. 1996 Oct 4;274(5284):97-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Section of Molecular Biology, University of Ulm, D-89070 Ulm, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8810255" target="_blank"〉PubMed〈/a〉
    Keywords: B-Lymphocytes/immunology ; Cell Line ; Consanguinity ; *DNA-Binding Proteins ; Female ; Genes, Immunoglobulin ; Genes, Recessive ; *Homeodomain Proteins ; Humans ; Immunophenotyping ; Male ; Mutation ; Nuclear Proteins ; Polymorphism, Single-Stranded Conformational ; Proteins/*genetics ; Receptors, Antigen, T-Cell/genetics ; Recombination, Genetic ; Sequence Deletion ; Severe Combined Immunodeficiency/*genetics/immunology ; Transfection
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 8
    facet.materialart.
    Unknown
    Specification of pituitary cell lineages by the LIM homeobox gene Lhx3 (1996)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1996-05-17
    Description: During pituitary organogenesis, the progressive differentiation of distinct pituitary-specific cell lineages from a common primordium involves a series of developmental decisions and inductive interactions. Targeted gene disruption in mice showed that Lhx3, a LIM homeobox gene expressed in the pituitary throughout development, is essential for differentiation and proliferation of pituitary cell lineages. In mice homozygous for the Lhx3 mutation, Rathke's pouch formed but failed to grow and differentiate; such mice lacked both the anterior and intermediate lobes of the pituitary. The determination of all pituitary cell lineages, except the corticotrophs, was affected, suggesting that a distinct, Lhx3-independent ontogenetic pathway exists for the initial specification of this lineage.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sheng, H Z -- Zhadanov, A B -- Mosinger, B Jr -- Fujii, T -- Bertuzzi, S -- Grinberg, A -- Lee, E J -- Huang, S P -- Mahon, K A -- Westphal, H -- New York, N.Y. -- Science. 1996 May 17;272(5264):1004-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Mammalian Genes and Development, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8638120" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carrier Proteins/genetics ; Cell Differentiation ; Cell Lineage ; Embryonic and Fetal Development ; *Gene Expression Regulation, Developmental ; Gene Targeting ; *Genes, Homeobox ; Glycoprotein Hormones, alpha Subunit/biosynthesis/genetics ; Homeodomain Proteins/*genetics ; LIM-Homeodomain Proteins ; *Membrane Proteins ; Mice ; Mutation ; Phospholipid Transfer Proteins ; Pituitary Gland/abnormalities/*cytology/embryology ; Pituitary Gland, Anterior/abnormalities/*cytology/embryology ; Pro-Opiomelanocortin/biosynthesis/genetics ; Transcription Factors
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 9
    facet.materialart.
    Unknown
    Regulation of statoconia mineralization in Aplysia californica in vitro (1996)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: Statoconia are calcium carbonate inclusions in the lumen of the gravity-sensing organ, the statocyst, of Aplysia californica. The aim of the present study was to examine the role of carbonic anhydrase and urease in statoconia mineralization in vitro. The experiments were performed using a previously described culture system (Pedrozo et al., J. Comp. Physiol. (A) 177:415-425). Inhibition of carbonic anhydrase by acetazolamide decreased statoconia production and volume, while inhibition of urease by acetohydroxamic acid reduced total statoconia number, but had no affect on statoconia volume. Inhibition of carbonic anhydrase initially increased and then decreased the statocyst pH, whereas inhibition of urease decreased statocyst pH at all times examined; simultaneous addition of both inhibitors also decreased pH. These effects were dose and time dependent. The results show that carbonic anhydrase and urease are required for statoconia formation and homeostasis, and for regulation of statocyst pH. This suggests that these two enzymes regulate mineralization at least partially through regulation of statocyst pH.
    Keywords: Life Sciences (General)
    Type: Connective tissue research (ISSN 0300-8207); Volume 35; 1-4; 317-23
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 10
    facet.materialart.
    Unknown
    Effects of spaceflight on rat peripheral blood leukocytes and bone marrow progenitor cells (1996)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: The white blood cell (WBC) elements and the bone marrow myeloid progenitor cell populations were analyzed to ascertain adaptation to micro-gravity and subsequent readaptation to 1 G in rats flown on the 14-day Spacelab Life Sciences-2 (SLS-2) mission. Bone marrow cells were harvested from one group of rats killed inflight (FD13) and blood was drawn from three other groups at various times. The WBC level was normal on FD14 with the exception of neutrophilia. On FD13, numbers of colony-forming units-granulocyte (CFU-G), CFU-GM, and CFU-M from flight animals were decreased compared with ground controls when incubated with recombinant rat interleukin-3 (rrIL-3) alone or in combination with recombinant human erythropoietin (rhEpo). On recovery (R + 0), flight rats had decreased numbers of total leukocytes and absolute numbers of lymphocytes and monocytes with elevated neutrophils compared with control rats. They had lower numbers of CD4, CD8, CD2, CD3, and B cells in the peripheral blood but no differences in spleen lymphocytes.
    Keywords: Life Sciences (General)
    Type: Journal of leukocyte biology (ISSN 0741-5400); Volume 60; 1; 37-43
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...