401
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Werner J, Behrend D, Martin H, Schmitz KP. Ermöglicht die Kenntnis der Architektur der Spongiosa sowie der Trabekelmaterialeigenschaften eine Abschätzung der Steifigkeit spongiöser Knochenvolumina ? BIOMED ENG-BIOMED TE 1994. [DOI: 10.1515/bmte.1994.39.s1.151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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402
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Martin H. Chapter 6 The Archean Grey Gneisses and the Genesis of Continental Crust. ARCHEAN CRUSTAL EVOLUTION 1994. [DOI: 10.1016/s0166-2635(08)70224-x] [Citation(s) in RCA: 189] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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403
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Martin H, Patel Y, Jones D, Howell S, Robinson K, Aitken A. Antibodies against the major brain isoforms of 14-3-3 protein: an antibody specific for the N-acetylated amino-terminus of a protein. FEBS Lett 1993; 336:189. [PMID: 8262209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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404
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Martin H. Pharmacist is link to improved systems, quality, and outcome. PROVIDER (WASHINGTON, D.C.) 1993; 19:47. [PMID: 10130673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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405
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Mattingly D, Martin H, Tyler CM. Estimation of urinary aldosterone using thin-layer chromatography and fluorimetry. J Clin Pathol 1993; 46:1109-12. [PMID: 8282834 PMCID: PMC501721 DOI: 10.1136/jcp.46.12.1109] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
AIMS To develop a fluorimetric method for the estimation of urinary aldosterone; to establish a normal range in 24 hour and overnight urine samples; and to investigate the use of overnight urines for detecting hyperaldosteronism. METHODS Essential steps include hydrolysis of the 18 conjugate to release aldosterone and its oxidation with Benedict's solution, followed by thin-layer chromatography on silica gel and development of fluorescence on the plate with sulphuric acid. RESULTS There was a linear correlation between the amount of aldosterone and the area under the peak on the chromatogram. The mean intra-assay and interassay coefficients of variation were 4.4% and 6.8%, respectively. The mean aldosterone excretion in 67 adults was 15.7 (SD 8.1) nmol/24 hours. The mean overnight excretion in 65 adults was 2.6 (1.4) nmol/8 hours. The method detected raised concentrations in patients with primary and secondary aldosteronism. CONCLUSIONS This technique provides an accurate means of assaying urinary aldosterone. Overnight estimations seem to be as effective as 24 hour assays for identifying patients with hyperaldosteronism.
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406
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Martin H, Bruecher J, Claudé R, Hoelzer D. Cumulative chemotherapy increases mafosfamide toxicity for normal progenitor cells in AML patients: rationale for cryopreserving adapted-dose purged marrow early in first complete remission. Bone Marrow Transplant 1993; 12:495-9. [PMID: 8298560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
To evaluate whether conditions for adapted dose mafosfamide (mafo) purging vary with accumulating chemotherapy, we studied the sensitivity of bone marrow CFU-GM in a total of 30 patients at different stages of treatment. We determined the dose of 95% CFU-GM growth-inhibition by mafo (ID95) in 23 patients with acute myeloid leukemia (AML) and 7 patients with lymphoid malignancies in first or second complete remission (CR). Sixteen AML patients were studied in early first CR prior to intensive consolidation with high-dose cytarabine (HDAC) and had a median ID95 of 130 (range 90-190) micrograms mafo/ml; the median ID95 in 3 of 7 AML-CR1 and 4 of 7 AML-CR2 patients who previously had HDAC therapy was 75 (range 55-110) micrograms/ml whereas a control group of 7 patients with lymphoid malignancies in CR1 showed a median ID95 of 100 (range 80-160) micrograms/ml. In AML the difference between patients in CR1 prior to HDAC and patients in CR1 after HDAC late consolidation or in CR2 was highly significant (p = 0.0006). We conclude that accumulating chemotherapy pre-treatment, in particular HDAC intensive consolidation, increases mafo toxicity for non-leukemic bone marrow CFU-GM and conversely decreases the mafo concentration applicable for adjusted-dose purging to eliminate residual leukemic cells. Hence mafo purging appears to be more efficient when done in early CR1 compared with later stages of disease.
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407
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Martin H, Patel Y, Jones D, Howell S, Robinson K, Aitken A. Antibodies against the major brain isoforms of 14-3-3 protein. An antibody specific for the N-acetylated amino-terminus of a protein. FEBS Lett 1993; 331:296-303. [PMID: 8375512 DOI: 10.1016/0014-5793(93)80356-y] [Citation(s) in RCA: 68] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
14-3-3 proteins are apparently ubiquitous eukaryotic proteins that comprise a large number of isoforms. They have been implicated in the regulation of a wide range of biological processes [reviewed in Aitken et al. (1992) Trends Biochem. Sci. 17, 498-501]. We have raised specific antibodies against each mammalian brain isoform of 14-3-3 employing peptides synthesised from the amino-terminal regions. The peptides were, like the proteins from mammalian brain, N-acetylated. The antiserum specific for the epsilon isoform did not recognise the recombinant form of this protein (lacking the N-acetyl co-translational modification) expressed in E. coli until it was chemically acetylated.
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408
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Martin R, Börner H, Martin H, Rotzsch W. [Effect of cytoplasmic factors on cell nucleus binding of glucocorticoid receptor complexes in the rat liver of two age groups]. ZEITSCHRIFT FUR GERONTOLOGIE 1993; 26:238-42. [PMID: 8212792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The nuclei binding of activated glucocorticoid receptor complexes (GRC) was significantly diminished in old, unstressed rats compared with young ones. In animals killed at different times after physiological stress there were no significant age-dependent differences in nuclei binding of GRC, which recurred in the cytoplasm after 60, 120 and 180 min, resp. Addition of Ca2+ and ATP, resp., to the incubation system increased the nuclei bound part of GRC, especially in young animals. ATP-stimulated translocation promoter (ASTP), isolated from rat liver cytosol, raised the nuclei binding of GRC in both age groups, whereby the increase was only significant in young animals. In cytosol of old rats ASTP were found in a lower concentration; moreover, the reaction between ASTP, GRC, and the template seems to be impaired.
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409
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Martin H, Hoffmann R. Book Review: Tandem Organic Reactions. By Tse-Lok Ho. Angew Chem Int Ed Engl 1993. [DOI: 10.1002/anie.199311081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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410
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Martin H. [Biology of aging]. ZEITSCHRIFT FUR GERONTOLOGIE 1993; 26:209-10. [PMID: 8212787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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411
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Morgan A, Roth D, Martin H, Aitken A, Burgoyne RD. Identification of cytosolic protein regulators of exocytosis. Biochem Soc Trans 1993; 21:401-5. [PMID: 8359504 DOI: 10.1042/bst0210401] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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412
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Martin H, Dean M. An N-terminal peptide from link protein is rapidly degraded by chondrocytes, monocytes and B cells. EUROPEAN JOURNAL OF BIOCHEMISTRY 1993; 212:87-94. [PMID: 8444167 DOI: 10.1111/j.1432-1033.1993.tb17636.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
A peptide cleaved from the link-protein component of human and pig proteoglycan aggregates by trypsin and stromelysin was taken up and degraded further by human monocytes, B cells, chondrocytes and by mouse peritoneal macrophages. Monocytes were able to process the peptide twice as rapidly as peritoneal macrophages and some 16 times more rapidly than articular chondrocytes. The B cell line Priess, which unlike the monocytes and macrophages could not take up or degrade whole proteoglycan aggregates, was able to degrade the peptide at a rapid rate. Synthetic, unglycosylated peptides consisting of the first 16 and 13 N-terminal amino acids of human link protein, corresponding to its stromelysin-cleavage and trypsin-cleavage products, were also taken up and degraded in a similar manner to the natural products and, in addition, were able to block uptake of the 125I-labelled natural peptides. The isoelectric points of the re-secreted breakdown fragment from both the synthetic and natural peptides were identical and each peptide was processed by the cells to produce a single radiolabelled fragment. Each of these fragments was eluted with the same retention time during HPLC, indicating that the natural peptides were derived from the N-terminal region of the link. Since a proportion of the link protein extracted from human and pig cartilage has already undergone proteolysis to remove peptides from its N-terminal region, these peptides may be produced in articular cartilage during the normal process of turnover and ageing. Although a physiological function for this protein has not been established, it may have a homeostatic role in the regulation of proteoglycan synthesis.
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413
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Walker JW, Martin H, Schmitt FR, Barsotti RJ. Rapid release of an alpha-adrenergic receptor ligand from photolabile analogues. Biochemistry 1993; 32:1338-45. [PMID: 8095406 DOI: 10.1021/bi00056a020] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A series of 2-nitrobenzyl derivatives of the alpha 1-selective adrenergic agonist, L-phenylephrine [(R)-N-[2-(3-hydroxyphenyl)-2-hydroxyethyl]-N-methylammonium chloride], have been synthesized and characterized for the purpose of developing biologically inert compounds that can be rapidly converted to L-phenylephrine by near-UV irradiation. The compounds, derivatized on the phenolic oxygen, were O-(1-(2-nitrophenyl)ethyl)phenylephrine (I), O-(2-nitrobenzyl)phenylephrine (II), O-(4,5-dimethoxy-2-nitrobenzyl)phenylephrine (III), and O-(alpha-carboxyl-2-nitrobenzyl)phenylephrine (IV). All four compounds photolyzed to free phenylephrine following a brief exposure to 300-350-nm light or 347-nm laser light with steady-state quantum yields ranging from 0.05 to 0.28. The rates of phenylephrine formation on photolysis were estimated from the decay rates of aci-nitro intermediates detected by absorbance between 380 and 500 nm. Compound IV displayed the highest quantum yield (0.28) and most rapid photolysis rate (1980 s-1) measured under near physiological conditions, pH 7.0, 22 degrees C. Biological properties of the compounds were examined in smooth muscle from rat caudal artery. Laser pulse photolysis of IV at 347 nm initiated a maximal contraction in Krebs buffer, pH 7.1, 25 degrees C, that mimicked the response to 50 microM phenylephrine but was faster in onset. Photoinitiated contractions were characterized by a delay of 0.93 +/- 0.09 s followed by a rising phase with a 10-90% rise time of 3.56 +/- 0.17 s (n = 7). Responses were fully blocked by the alpha 1-selective antagonist prazosin.(ABSTRACT TRUNCATED AT 250 WORDS)
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414
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Martin H, Werner J, Schmitz KP, Behrend D. Geometrierekonstruktion aus Computertomographie-Bildern und Festigkeitsberechnungen an osteoporosegeschädigten Wirbelkörpern. BIOMED ENG-BIOMED TE 1993. [DOI: 10.1515/bmte.1993.38.s1.371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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415
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Martin H, Hoffmann R, Karama U. Synthesis of 9,10–Dihydro–9,10–propanoanthracen–12–ones Substituted at the Bridgehead. ACTA ACUST UNITED AC 1992. [DOI: 10.1002/cber.19921251228] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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416
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Zimmer C, Gottschalk J, Cervos-Navarro J, Martin H, Beil M, Jautzke G. Proliferating cell nuclear antigen (PCNA) in atypical and malignant meningiomas. Pathol Res Pract 1992; 188:951-8. [PMID: 1363764 DOI: 10.1016/s0344-0338(11)81237-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Abstract
Because it is not easy to determine the tumor status of meningiomas by current diagnostic procedures, we investigated these tumors immunohistochemically using the monoclonal antibody PC 10. This antibody recognizes a fixation- and processing-resistant epitope of the proliferating cell nuclear antigen (PCNA), which is a 36-KD nuclear antigen associated with the cell cycle. We studied paraffin-embedded and formalin-fixed tissue specimens of a group of 21 atypical/malignant meningiomas together with 18 benign meningiomas. PCNA staining results were compared with the mean number of silver-stained nucleolar organizer region-associated proteins (AgNORs), tumor grading, and mitotic indices of these tumors. The percentage of PCNA-positive cells was found to range between 0.1% and 40%, irrespective of the tumor grade. When all tumors were collectively considered, no positive correlation was found between PCNA scores and histologic grading and only a weak one between PCNA score and mitotic index. A higher correlation was seen between AgNOR counts and tumor grading. Our results suggest that PCNA labeling and histologic grading seem to be independent parameters. The correlations found between AgNOR counts and tumor grading should be substantiated in further series.
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417
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Baumgartner JC, Martin H, Sabala CL, Strittmatter EJ, Wildey WL, Quigley NC. Histomorphometric comparison of canals prepared by four techniques. J Endod 1992; 18:530-4. [PMID: 1298788 DOI: 10.1016/s0099-2399(06)81208-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Numerous methods of root canal preparation have been recommended and used by clinicians. This study used histomorphometrics to determine the area of root canal preparations using four currently popular techniques. Clinicians that were highly skilled in each technique prepared curved canals in acrylic blocks. Each clinician described this technique and discussed the technique with regard to the use of acrylic blocks as compared with dentin. Analysis of the areas of the root canals after preparation revealed a significant difference among the groups. The mean areas after treatment were step-back technique, 17.33 mm2; Cavi-Endo technique, 15.87 mm2; Canal Master technique, 13.56 mm2; and balanced force technique, 17.31 mm2. Photographs of the blocks used in the study were included for inspection by the reader.
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418
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Wahrburg U, Martin H, Sandkamp M, Schulte H, Assmann G. Comparative effects of a recommended lipid-lowering diet vs a diet rich in monounsaturated fatty acids on serum lipid profiles in healthy young adults. Am J Clin Nutr 1992; 56:678-83. [PMID: 1414967 DOI: 10.1093/ajcn/56.4.678] [Citation(s) in RCA: 57] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
This crossover study investigated the effects of two fat-reduced diets, one rich in monounsaturated fatty acids (MUFAs), the other rich in polyunsaturated fatty acids (PUFAs), on serum lipid profiles in 38 healthy young adults initially on a typical western diet. After being randomly assigned to two groups, the subjects received the MUFA or PUFA diet for 3-wk and then the other diet for 3 wk. Both test diets led to significant reductions in serum cholesterol, LDL cholesterol, and HDL cholesterol (P less than 0.001). Both reduced apolipoprotein B (P less than 0.001) and apolipoprotein A-I concentrations (P less than 0.01 for the MUFA, P less than 0.001 for the PUFA diet). Apolipoprotein A-I was significantly higher on the MUFA than on the PUFA diet. The ratio of apolipoprotein A-I to B significantly increased on both diets. Thus, a low-fat, MUFA-rich diet is as effective as a low-fat, PUFA-rich diet in lowering total and LDL cholesterol, but both also lowered HDL cholesterol concentrations. The MUFA-rich diet may be more advantageous than the PUFA-rich one because it does not lower apolipoprotein A-I concentrations as much as the PUFA-rich diet.
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419
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Martin H. New drug guidelines restrict use of psychoactive medications. PROVIDER (WASHINGTON, D.C.) 1992; 18:67. [PMID: 10136575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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420
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Gottschalk J, Goebel S, Jautzke G, Martin H, Zimmer C, Märzheuser-Brands S, Cervós-Navarro J. Influence of preoperative dexamethasone therapy on proliferating cell nuclear antigen (PCNA) expression in comparison to other parameters in meningiomas. Histol Histopathol 1992; 7:653-61. [PMID: 1360848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/25/2023]
Abstract
We conducted a trial in 42 benign and malignant meningiomas to assess a possible influence of preoperative dexamethasone therapy on mitotic index, labelling indices of proliferating cell nuclear antigen (PCNA), progesterone receptor, epidermal growth factor receptor (EGF-R), c-erbB-2 oncoprotein, cathepsin D, gamma-gamma enolase as well as the mean number of silver-stained nucleolar organizer region-associated proteins (AgNORs). Tumors with preceding dexamethasone therapy for more than 1 day display significantly less immunohistochemical staining for PCNA. A correlation between the labelling index of PCNA and the degree of malignancy could not be identified. There was no significant effect of preoperative dexamethasone therapy on the other parameters. Our data suggest that dexamethasone may selectively inhibit the expression of PCNA in the G1/S-phase of the cell cycle. Thus, we emphasize the necessity to heed factors, e.g. dexamethasone, which may affect the expression of proliferating markers.
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421
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Martin H, Nilles M. Radiale Wärmeleitung in durchströmten Schüttungsrohren - eine vergleichende Übersicht neuer experimenteller Befunde. CHEM-ING-TECH 1992. [DOI: 10.1002/cite.330640964] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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422
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Martin H, Hufnagl P, Beil M, Wenzelides K, Gottschalk J, Rahn W. Nucleolar organizer region-associated proteins in cancer cells. Quantitative investigations on gliomas, meningiomas, urinary bladder carcinomas and pleural lesions. ANALYTICAL AND QUANTITATIVE CYTOLOGY AND HISTOLOGY 1992; 14:312-9. [PMID: 1388568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Using a modified silver staining technique, we investigated nucleolar organizer region-associated proteins (AgNORs) in paraffin sections of 156 neoplastic tissues and other lesions, including gliomas (n = 41), meningiomas (n = 20), urinary bladder carcinomas (n = 58), and neoplastic and reactive lesions of the mesothelium of the pleural cavity (n = 37). We found significant differences in the mean number and area of AgNORs per nucleus between nonanaplastic and anaplastic astrocytomas. In meningiomas AgNOR analysis may be useful to distinguish between mostly benign tumors (grade 1 tumors) and atypical ones. Urinary bladder carcinomas exhibited a statistically significant increase in both AgNOR number and area as the grade of malignancy increased. Diagnostically useful differences in the AgNOR configuration between inflammatory and neoplastic processes were found for mesothelial lesions. In general, a higher grade of malignancy correlated with an increase in the AgNOR number. This was accompanied by an increase in the total AgNOR area per nucleus, irrespective of whether the size of the individual AgNORs had changed.
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423
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Aitken A, Amess B, Howell S, Jones D, Martin H, Patel Y, Robinson K, Toker A. The role of specific isoforms of 14-3-3 protein in regulating protein kinase activity in the brain. Biochem Soc Trans 1992; 20:607-11. [PMID: 1426598 DOI: 10.1042/bst0200607] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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424
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Martin H. Pharmacists help reduce spread of infections. PROVIDER (WASHINGTON, D.C.) 1992; 18:63. [PMID: 10117802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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425
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Thiel G, Losanowa T, Kintzel D, Nisch G, Martin H, Vorpahl K, Witkowski R. Karyotypes in 90 human gliomas. CANCER GENETICS AND CYTOGENETICS 1992; 58:109-20. [PMID: 1551072 DOI: 10.1016/0165-4608(92)90095-p] [Citation(s) in RCA: 115] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Cytogenetic studies were performed on 90 human gliomas including 26 astrocytomas, 12 oligodendrogliomas, three oligo-astrocytomas, seven ependymomas, eight pilocytic astrocytomas, and 33 malignant gliomas (anaplastic astrocytomas and glioblastomas). The most common abnormalities were trisomy 7 in 23 cases, monosomy 22 in 15 cases, losses of the Y chromosome in 19 of 50 male cases, and losses of the X chromosome in 10 of 39 female cases. There are evident differences between the particular subgroups of gliomas. Monosomy 10 and double minutes are typical for malignant gliomas. The 58 determined chromosomal breakpoints were located on 45 different sites. Chromosomes 1, 9, 6, 3, 10, and 17 were predominantly involved.
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