Search Results - (Author, Cooperation:J. L. Hopper)

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  1. 1
    J. R. Perry ; F. Day ; C. E. Elks ; P. Sulem ; D. J. Thompson ; T. Ferreira ; C. He ; D. I. Chasman ; T. Esko ; G. Thorleifsson ; E. Albrecht ; W. Q. Ang ; T. Corre ; D. L. Cousminer ; B. Feenstra ; N. Franceschini ; A. Ganna ; A. D. Johnson ; S. Kjellqvist ; K. L. Lunetta ; G. McMahon ; I. M. Nolte ; L. Paternoster ; E. Porcu ; A. V. Smith ; L. Stolk ; A. Teumer ; N. Tsernikova ; E. Tikkanen ; S. Ulivi ; E. K. Wagner ; N. Amin ; L. J. Bierut ; E. M. Byrne ; J. J. Hottenga ; D. L. Koller ; M. Mangino ; T. H. Pers ; L. M. Yerges-Armstrong ; J. Hua Zhao ; I. L. Andrulis ; H. Anton-Culver ; F. Atsma ; S. Bandinelli ; M. W. Beckmann ; J. Benitez ; C. Blomqvist ; S. E. Bojesen ; M. K. Bolla ; B. Bonanni ; H. Brauch ; H. Brenner ; J. E. Buring ; J. Chang-Claude ; S. Chanock ; J. Chen ; G. Chenevix-Trench ; J. M. Collee ; F. J. Couch ; D. Couper ; A. D. Coviello ; A. Cox ; K. Czene ; P. D'Adamo A ; G. Davey Smith ; I. De Vivo ; E. W. Demerath ; J. Dennis ; P. Devilee ; A. K. Dieffenbach ; A. M. Dunning ; G. Eiriksdottir ; J. G. Eriksson ; P. A. Fasching ; L. Ferrucci ; D. Flesch-Janys ; H. Flyger ; T. Foroud ; L. Franke ; M. E. Garcia ; M. Garcia-Closas ; F. Geller ; E. E. de Geus ; G. G. Giles ; D. F. Gudbjartsson ; V. Gudnason ; P. Guenel ; S. Guo ; P. Hall ; U. Hamann ; R. Haring ; C. A. Hartman ; A. C. Heath ; A. Hofman ; M. J. Hooning ; J. L. Hopper ; F. B. Hu ; D. J. Hunter ; D. Karasik ; D. P. Kiel ; J. A. Knight ; V. M. Kosma ; Z. Kutalik ; S. Lai ; D. Lambrechts ; A. Lindblom ; R. Magi ; P. K. Magnusson ; A. Mannermaa ; N. G. Martin ; G. Masson ; P. F. McArdle ; W. L. McArdle ; M. Melbye ; K. Michailidou ; E. Mihailov ; L. Milani ; R. L. Milne ; H. Nevanlinna ; P. Neven ; E. A. Nohr ; A. J. Oldehinkel ; B. A. Oostra ; A. Palotie ; M. Peacock ; N. L. Pedersen ; P. Peterlongo ; J. Peto ; P. D. Pharoah ; D. S. Postma ; A. Pouta ; K. Pylkas ; P. Radice ; S. Ring ; F. Rivadeneira ; A. Robino ; L. M. Rose ; A. Rudolph ; V. Salomaa ; S. Sanna ; D. Schlessinger ; M. K. Schmidt ; M. C. Southey ; U. Sovio ; M. J. Stampfer ; D. Stockl ; A. M. Storniolo ; N. J. Timpson ; J. Tyrer ; J. A. Visser ; P. Vollenweider ; H. Volzke ; G. Waeber ; M. Waldenberger ; H. Wallaschofski ; Q. Wang ; G. Willemsen ; R. Winqvist ; B. H. Wolffenbuttel ; M. J. Wright ; D. I. Boomsma ; M. J. Econs ; K. T. Khaw ; R. J. Loos ; M. I. McCarthy ; G. W. Montgomery ; J. P. Rice ; E. A. Streeten ; U. Thorsteinsdottir ; C. M. van Duijn ; B. Z. Alizadeh ; S. Bergmann ; E. Boerwinkle ; H. A. Boyd ; L. Crisponi ; P. Gasparini ; C. Gieger ; T. B. Harris ; E. Ingelsson ; M. R. Jarvelin ; P. Kraft ; D. Lawlor ; A. Metspalu ; C. E. Pennell ; P. M. Ridker ; H. Snieder ; T. I. Sorensen ; T. D. Spector ; D. P. Strachan ; A. G. Uitterlinden ; N. J. Wareham ; E. Widen ; M. Zygmunt ; A. Murray ; D. F. Easton ; K. Stefansson ; J. M. Murabito ; K. K. Ong
    Nature Publishing Group (NPG)
    Published 2014
    Staff View
    Publication Date:
    2014-09-19
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Adolescent ; Age Factors ; *Alleles ; Body Mass Index ; Breast Neoplasms/genetics ; Cardiovascular Diseases/genetics ; Child ; Diabetes Mellitus, Type 2/genetics ; Europe/ethnology ; Female ; Genetic Loci/*genetics ; Genome-Wide Association Study ; Genomic Imprinting/genetics ; Humans ; Hypothalamo-Hypophyseal System/physiology ; Intercellular Signaling Peptides and Proteins/genetics ; Male ; Membrane Proteins/genetics ; Menarche/*genetics ; Obesity/genetics ; Ovary/physiology ; *Parents ; Polymorphism, Single Nucleotide/genetics ; Potassium Channels, Tandem Pore Domain/genetics ; Proteins/genetics ; Quantitative Trait Loci/genetics ; Receptors, GABA-B/metabolism ; Receptors, Retinoic Acid/metabolism ; Ribonucleoproteins/genetics
    Published by:
    http://www.nature.com/

    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Staff View
    Publication Date:
    2011-11-15
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Adult ; Aged ; Aged, 80 and over ; Female ; Gene Expression Regulation, Neoplastic ; *Genetic Predisposition to Disease ; Humans ; Male ; Melanoma/*genetics ; Microphthalmia-Associated Transcription Factor/*genetics ; Middle Aged ; *Mutation ; Sumoylation/genetics ; Young Adult
    Published by:
    http://www.nature.com/

    Latest Papers from Table of Contents or Articles in Press
  3. 3
    Staff View
    ISSN:
    1433-2965
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF01621860

    Articles: DFG German National Licenses
  4. 4
    Staff View
    ISSN:
    1433-2965
    Keywords:
    Key words:Bone density – Bone loss – Hip – Menopause – Perimenopause – Spine
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Abstract: Two hundred and twenty-four women (74 pre-, 90 peri-, 60 post-menopausal), aged 46–59 years, from a population-based cohort participated in a longitudinal study of bone mineral density (BMD). BMD was measured by dual-energy X-ray absorptiometry (DXA) at the lumbar spine and femoral neck and the time between bone scans was on average 25 (range 14–41) months. The aim of the study was to assess changes in BMD in relation to changes in normal menopausal status. During the study period women who were between 3 and 12 months past their last menstrual period (n= 22, late perimenopausal) at the time of the second bone scan had a mean (SE) annual change in BMD of 70.9% (0.4%) at the lumbar spine and 70.7% (0.6%) at the femoral neck (both p50.05 compared with women who remained premenopausal). In the women who became postmenopausal (n= 42) the mean annual changes in BMD were 72.5% (0.2%) at the lumbar spine and 71.7% (0.2%) at the femoral neck (both p50.0005), and in the women who remained postmenopausal (n= 60) they were 70.7% (0.2%) per year and 70.5% (0.3%) per year respectively (both p50.05), compared with women who remained premenopausal. In the 1–3 years after the final menstrual period (FMP) there was greater bone loss from the lumbar spine than the femoral neck (p50.05). In women who were menstruating at the time of the second bone scan and whose FMP could be dated prospectively (n= 35), higher baseline oestradiol levels were associated with less lumbar spine bone loss (p50.005). In the women who remained postmenopausal there was an association between baseline body mass index (BMI) and percentage change per year in femoral neck BMD (p50.05), such that women with higher BMI had less bone loss. In conclusion, during the time of transition from peri- to post-menopause, women had accelerated BMD loss at both the hip and spine.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/s001980050066

    Articles: DFG German National Licenses
  5. 5
    Staff View
    ISSN:
    1433-2965
    Keywords:
    Bone density ; Calcitonin ; Females ; Nandrolone decanoate
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Abstract This study used a randomized, 2 × 2 factorial design to evaluate over 2 years the effect of intranasal salmon calcitonin and intramuscular nandrolone decanoate on bone mass in elderly women with established osteoporosis. The study was double masked in relation to calcitonin and open in relation to nandrolone decanoate. One hundred and twenty-three women aged 60–88 years who had sustained a previous osteoporotic fracture, or had osteopenia, were recruited through an outpatient clinic. Women were assigned to one of four groups: (1) daily placebo nasal spray, (2) 400 IU intranasal calcitonin daily, (3) 20 intramuscular injections of 50 mg nandrolone decanoate (given as two courses of 10 injections) plus placebo nasal spray, or (4) 20 injections of 50 mg nandrolone decanoate plus 400 IU intranasal calcitonin daily. All subjects received 1000 mg calcium supplementation daily. Outcomes measured included changes in bone mineral density (BMD) at the lumbar spine, as measured by dual-energy quantitative computed tomography (DEQCT), in BMD of the proximal femur, and BMD and bone mineral content (BMC) of the lumbar spine and forearm, as measured by dual-energy X-ray absorptiometry (DXA). Significant positive changes from baseline in DXA BMC at the lumbar spine were observed over 2 years in the calcitonin group (5.0±1.9%, mean ± SE) and in the nandrolone deconate group (4.7±1.9%) but not in the placebo group (1.1±2.2%) or the combined therapy group (0.7±1.8%). Modelling based on the 2×2 factorial design revealed that nandrolone decanoate was associated with a 3.8±1.8% (p〈0.05) gain in DXA BMD at the proximal femur. Modelling also revealed that calcitonin treatment was associated with a loss of 11.5±4.7% in DEQCT BMD at the lumbar spine and a loss of 3.7±1.8% in DXA BMD at the proximal femur (p〈0.05). There was in vivo antagonism between the two medications of 7.9±3.9% for DXA BMC at the lumbar spine. Both agents caused positive changes from baseline in lumbar spine BMC. Nandrolone decanoate had beneficial effects on BMD at the proximal femur. This dose of intranasal calcitonin was associated with deleterious effects on trabecular BMD at the lumbar spine and total BMD at the proximal femur. There may be significant clinical antagonism between these two medications.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF01623456

    Articles: DFG German National Licenses
  6. 6
    Staff View
    ISSN:
    1433-2965
    Keywords:
    Adolescence ; Bone density ; Calcium supplementation ; Twins
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Abstract The effect of calcium supplementation on bone mineral density (BMD) was evaluated in female twin pairs aged 10–17 years with a mean age of 14 years. Forty-two twin pairs (22 monozygotic, 20 dizygotic; (including one monozygotic pair from a set of triplets) completed at least 6 months of the intervention: 37 pairs to 12 months and 28 pairs to 18 months. BMD was measured by dual-energy X-ray absorptiometry (DXA). In a double-blind manner, one twin in each pair was randomly assigned to receive daily a 1000 mg effervescent calcium tablet (Sandocal 1000), and the other a placebo tablet similar in taste and appearance to the calcium supplement but containing no calcium. Compliance (at least 80% tablets consumed), as measured by tablet count, was 85% in the placebo group and 83% in the calcium group over the 18 months of the study, on average increasing dietary calcium to over 1600 mg/day. There was no within-pair difference in the change in height or weight. When the effect of calcium supplementation on BMD was compared with placebo at approximately 6, 12 and 18 months, it was found that there was a 0.015±0.007 g/ cm2 greater increase in BMD (1.62±0.84%) at the spine in those on calcium after 18 months. At the end of the first 6 months there was a significant within-pair difference of 1.53±0.56% at the spine and 1.27±0.50% at the hip. However, there were no significant differences in the changes in BMD after the initial effect over the first 6 months. Therefore, we found an increase in BMD at the spine with calcium supplementation in females with a mean age of 14 years. The greatest effect was seen in the first 6 months; thereafter the difference was maintained, but there was no accelerated increase in BMD associated with calcium supplementation. The continuance of the intervention until the attainment of peak bone mass and follow-up after cessation of calcium supplementation will be important in clarifying the optimal timing for increased dietary calcium and the sustained, long-term effects of this intervention.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF01622292

    Articles: DFG German National Licenses
  7. 7
    Martin, F. I. R. ; Hopper, J. L.
    Springer
    Published 1987
    Staff View
    ISSN:
    1432-0428
    Keywords:
    Vascular disease ; acute insulin sensitivity ; long duration Type 1 (insulin-dependent) diabetes
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Summary In 51 individuals with Type 1 (insulin-dependent) diabetes mellitus initially of more than 15 years' duration, the acute hypoglycaemic effect of intravenous insulin (0.11 IU/ kg) was related to outcome over 18 years. This acute insulin sensitivity, or glucose assimilation index, was reproducible over the period of study. At 18-year follow-up, initial low glucose assimilation index (〈0.082 mmol·1−1· min−1 was significantly (p〈0.01) associated with death from vascular disease. Low glucose assimilation index was similarly significantly (p〈0.01) associated with progression of atherosclerotic disease, but not with microangiopathy alone. Hypertension (systolic blood pressure 〉 150mmHg and/or diastolic blood pressure 〉 95 mmHg) was the only other parameter significantly (p〈0.01) related to outcome, but this relationship was no longer significant once glucose assimilation index had been taken into account. A linear logistic analysis confirmed that acute insulin sensitivity was independently associated with outcome. Neither initial clinical control of diabetes nor glycosylated haemoglobin level in the 26 survivors was related to vascular prognosis.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00274219

    Articles: DFG German National Licenses
  8. 8
    Hopper, J. L.
    Springer
    Published 1999
    Staff View
    ISSN:
    1432-0428
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/s001250051129

    Articles: DFG German National Licenses
  9. 9
    Staff View
    ISSN:
    1432-0827
    Keywords:
    Key words: Bone turnover — Bone remodeling — Stress fractures — Exercise.
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Medicine
    Physics
    Notes:
    Abstract. Bone remodeling may be involved in the pathogenesis of stress fractures in athletes. We conducted a 12-month prospective study to evaluate bone turnover in 46 female and 49 male track and field athletes aged 17–26 years (mean age 20.3; SD 2.0) 20 of whom developed a stress fracture. Baseline levels of bone turnover were evaluated in all athletes and monthly bone turnover levels were evaluated in a subset consisting of the 20 athletes who sustained a stress fracture and a matched comparison group who did not sustain a stress fracture. Bone formation was assessed using serum osteocalcin (OC) measured by human immunoradiometric assay and bone resorption by urinary excretion of pyridinium cross-links (Pyr and D-Pyr); high performance liquid chromatography and N-telopeptides of type 1 collagen (NTx) using ELISA assay. Athletes who developed stress fractures had similar baseline levels of bone turnover compared with their nonstress fracture counterparts (P 〉 0.10). Results of serial measurements showed no differences in average levels of Pyr, D-Pyr, or OC in those who developed stress fractures (P= 0.10) compared with the control group. In the athletes with stress fractures, there was also no difference in bone turnover levels prior to or following the onset of bony pain. Our results show that single and multiple measurements of bone turnover are not clinically useful in predicting the likelihood of stress fractures in athletes. Furthermore, there were no consistent temporal changes in bone turnover associated with stress fracture development. However, our results do not negate the possible pathogenetic role of local changes in bone remodeling at stress fracture sites, given the high biological variability of bone turnover markers and the fact that levels of bone turnover reflect the integration of all bone remodeling throughout the skeleton.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/s002239900493

    Articles: DFG German National Licenses
  10. 10
    Staff View
    ISSN:
    1432-1920
    Keywords:
    Dynamic cerebral CT scanning ; Arterial occlusive lesions ; Haemodynamic effects
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Summary Dynamic cerebral CT scanning (DCT) was used to quantitatively analyse the haemodynamic effects of extracranial and intracranial arterial occlusive lesions in 17 patients with TIA's or minor cerebral infarcts. Using DCT and gamma variate curve fitting, mean transit times were determined for the terminal internal carotid arteries, middle cerebral arteries and middle cerebral-supplied Sylvian cortex at the level of the Circle of Willis. Six patients were studied sequentially, four before and after transcranial bypass surgery. No arterial or tissue delays were found in patients without haemodynamic arterial lesions or cortical infarcts. Seven of nine patients with haemodynamic, extracranial carotid lesions showed ipsilateral delays in arterial or tissue transit times. Tissue delays usually correlated with CT or clinical evidence of infarction. Improved haemodynamics in patients re-studied correlated with the effects of surgery or clinical recovery. DCT has several important limitations but has the potential to provide additional haemodynamic information about the cerebral circulation in selected patients with cerebral arterial occlusive disease.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00451764

    Articles: DFG German National Licenses
  11. 11
    Hopper, J. L.
    Springer
    Published 1993
    Staff View
    ISSN:
    1432-1076
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF02073392

    Articles: DFG German National Licenses