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Van Schaik J, Burghard M, Lequin MH, van Maren EA, van Dijk AM, Takken T, Rehorst-Kleinlugtenbelt LB, Bakker B, Meijer L, Hoving EW, Fiocco M, Schouten-van Meeteren AYN, Tissing WJE, van Santen HM. Resting energy expenditure in children at risk of hypothalamic dysfunction. Endocr Connect 2022; 11:EC-22-0276. [PMID: 35904233 PMCID: PMC9346331 DOI: 10.1530/ec-22-0276] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Accepted: 06/27/2022] [Indexed: 12/27/2022]
Abstract
OBJECTIVE Children with suprasellar brain damage are at risk of hypothalamic dysfunction (HD). HD may lead to decreased resting energy expenditure (REE). Decreased REE, however, is not present in all children with HD. Our aim was to assess which children suspect for HD have low REE, and its association with clinical severity of HD or radiological hypothalamic damage. PATIENTS AND METHODS A retrospective cohort study was performed. Measured REE (mREE) of children at risk of HD was compared to predicted REE (pREE). Low REE was defined as mREE <90% of predicted. The mREE/pREE quotient was associated to a clinical score for HD symptoms and to radiological hypothalamic damage. RESULTS In total, 67 children at risk of HD (96% brain tumor diagnosis) with a mean BMI SDS of +2.3 ± 1.0 were included. Of these, 45 (67.2%) had low mREE. Children with severe HD had a significant lower mean mREE/pREE quotient compared to children with no, mild, or moderate HD. Mean mREE/pREE quotient of children with posterior hypothalamic damage was significantly lower compared to children with no or anterior damage. Tumor progression or tumor recurrence, severe clinical HD, and panhypopituitarism with diabetes insipidus (DI) were significant risk factors for reduced REE. CONCLUSION REE may be lowered in children with hypothalamic damage and is associated to the degree of clinical HD. REE is, however, not lowered in all children suspect for HD. For children with mild or moderate clinical HD symptoms, REE measurements may be useful to distinguish between those who may benefit from obesity treatment that increases REE from those who would be better helped using other obesity interventions.
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Affiliation(s)
- J Van Schaik
- Division of Pediatric Endocrinology, Wilhelmina Children’s Hospital, University Medical Center Utrecht, Utrecht, The Netherlands
- Division of Pediatric Oncology, Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Correspondence should be addressed to J Van Schaik:
| | - M Burghard
- Division of Pediatric Oncology, Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Department of Exercise Physiology, Child Development & Exercise Center, Wilhelmina Children’s Hospital, University Medical Center Utrecht, Utrecht, The Netherlands
| | - M H Lequin
- Division of Pediatric Oncology, Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Department of Radiology, Wilhelmina Children’s Hospital, University Medical Center Utrecht, Utrecht, The Netherlands
| | - E A van Maren
- Division of Pediatric Oncology, Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Department of Radiology, Wilhelmina Children’s Hospital, University Medical Center Utrecht, Utrecht, The Netherlands
| | - A M van Dijk
- Department of Dietetics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - T Takken
- Division of Pediatric Oncology, Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Department of Exercise Physiology, Child Development & Exercise Center, Wilhelmina Children’s Hospital, University Medical Center Utrecht, Utrecht, The Netherlands
| | | | - B Bakker
- Division of Pediatric Endocrinology, Wilhelmina Children’s Hospital, University Medical Center Utrecht, Utrecht, The Netherlands
- Division of Pediatric Oncology, Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
| | - L Meijer
- Division of Pediatric Oncology, Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
| | - E W Hoving
- Division of Neurosurgery, Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
| | - M Fiocco
- Division of Pediatric Oncology, Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Institute of Mathematics, Leiden University, Leiden, The Netherlands
| | | | - W J E Tissing
- Division of Pediatric Oncology, Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Division of Pediatric Oncology, University Medical Centre Groningen, Groningen, The Netherlands
| | - H M van Santen
- Division of Pediatric Endocrinology, Wilhelmina Children’s Hospital, University Medical Center Utrecht, Utrecht, The Netherlands
- Division of Pediatric Oncology, Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
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Veerman SRT, Cohen D, Bakker B. [Standaard laxantia ter preventie van paralytische ileus bij clozapine?]. Tijdschr Psychiatr 2022; 64:344-345. [PMID: 35748143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
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3
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De Bot CMA, Smits S, Bakker B, Dierx JAJ. Bringing back community engagement with Triple I method. Eur J Public Health 2018. [DOI: 10.1093/eurpub/cky218.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- CMA De Bot
- Research group Living in Motion, Avans University of Applied Sciences, Breda, Netherlands
| | | | - B Bakker
- Oss City Counsil, Oss, Netherlands
| | - JAJ Dierx
- Research group Living in Motion, Avans University of Applied Sciences, Breda, Netherlands
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van de Donk T, Bakker B, Postulart B, Renckens K, Snak L, Kleinloog D, van Velzen M, Dahan A, van Dasselaar N, Niesters M. [Not Available]. Ned Tijdschr Geneeskd 2017; 161:D1467. [PMID: 28831931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
OBJECTIVE To evaluate the effect of an ice-lolly on acute postoperative pain. DESIGN Randomised prospective intervention study. METHOD A total of 100 patients scheduled for an elective laparoscopic cholecystectomy were recruited to participate in the study. Patients were randomised to receive either an ice-lolly or no treatment after arrival at the post-anaesthesia care unit. The analgesic requirements (opioid and non-opioid), pain scores, and the presence of nausea and vomiting were registered on the post- anaesthesia care unit and ward during the first 24 hours after surgery. This study is registered in the Nederlands Trial Register under number NTR5335. RESULTS In the post-anaesthesia care unit, pain scores did not differ between patients who received an ice-lolly and those who did not. The opioid requirements of patients who had consumed an ice-lolly were significantly lower than those of the patients who had not (cumulative piritramide dose: 4.9 (SD 4.2) with ice-lolly vs. 6.6 (SD 4.0) without ice-lolly mg; P = 0.04). Furthermore, patients who did not receive an ice-lolly required more additional pain relief with non-opioid analgesics than patients who had been given an ice- lolly (31% vs. 10%; P = 0.01). Combining all administered opioid and non-opioid analgesics into one analgesic composite score showed that patients who received an ice-lolly required significantly fewer analgesics in the post-anaesthesia care unit than patients who had not been given an ice-lolly (2.2 (SD 1.7) vs. 2.9 (SD 1.8); P = 0.03). No differences between the groups in pain scores or use of analgesics were observed on the ward in the first 24 hours postoperatively. CONCLUSION The postoperative consumption of an ice-lolly reduces postoperative opioid and non-opioid analgesic requirements in the post- anaesthesia care unit. Conflict of interest and financial support: none declared.
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Affiliation(s)
- T van de Donk
- Leids Universitair Medisch Centrum, afd. Anesthesiologie, Leiden
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Goossens R, Balog J, Lemmers J, van den Boogaard M, van der Vliet P, Donlin-Smith C, Nations S, Kriek M, Ruivenkamp C, Heard P, Bakker B, Tapscott S, Cody J, Tawil R, van der Maarel S. Monosomy 18p: Risks for developing FSHD. Neuromuscul Disord 2016. [DOI: 10.1016/j.nmd.2016.06.295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Dlabac-de Lange JJ, Bais L, van Es FD, Visser BGJ, Reinink E, Bakker B, van den Heuvel ER, Aleman A, Knegtering H. Efficacy of bilateral repetitive transcranial magnetic stimulation for negative symptoms of schizophrenia: results of a multicenter double-blind randomized controlled trial. Psychol Med 2015; 45:1263-1275. [PMID: 25354751 DOI: 10.1017/s0033291714002360] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
BACKGROUND Few studies have investigated the efficacy of repetitive transcranial magnetic stimulation (rTMS) treatment for negative symptoms of schizophrenia, reporting inconsistent results. We aimed to investigate whether 10 Hz stimulation of the bilateral dorsolateral prefrontal cortex during 3 weeks enhances treatment effects. METHOD A multicenter double-blind randomized controlled trial was performed in 32 patients with schizophrenia or schizo-affective disorder, and moderate to severe negative symptoms [Positive and Negative Syndrome Scale (PANSS) negative subscale ⩾15]. Patients were randomized to a 3-week course of active or sham rTMS. Primary outcome was severity of negative symptoms as measured with the Scale for the Assessment of Negative Symptoms (SANS) and the PANSS negative symptom score. Secondary outcome measures included cognition, insight, quality of life and mood. Subjects were followed up at 4 weeks and at 3 months. For analysis of the data a mixed-effects linear model was used. RESULTS A significant improvement of the SANS in the active group compared with sham up to 3 months follow-up (p = 0.03) was found. The PANSS negative symptom scores did not show a significant change (p = 0.19). Of the cognitive tests, only one showed a significant improvement after rTMS as compared with sham. Finally, a significant change of insight was found with better scores in the treatment group. CONCLUSIONS Bilateral 10 Hz prefrontal rTMS reduced negative symptoms, as measured with the SANS. More studies are needed to investigate optimal parameters for rTMS, the cognitive effects and the neural basis.
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Affiliation(s)
- J J Dlabac-de Lange
- University of Groningen,University Medical Center Groningen,Department of Psychiatry,Hanzeplein 1,Groningen,The Netherlands
| | - L Bais
- University of Groningen,University Medical Center Groningen,Department of Neuroscience and BCN Neuroimaging Center,Antonius Deusinglaan 2,Groningen,The Netherlands
| | - F D van Es
- University of Groningen,University Medical Center Groningen,Department of Psychiatry,Hanzeplein 1,Groningen,The Netherlands
| | - B G J Visser
- University of Groningen,University Medical Center Groningen,Department of Psychiatry,Hanzeplein 1,Groningen,The Netherlands
| | - E Reinink
- Lentis Research,Center for Mental Health,Hereweg 80,Groningen,The Netherlands
| | - B Bakker
- Lentis Research,Center for Mental Health,Hereweg 80,Groningen,The Netherlands
| | - E R van den Heuvel
- University of Groningen,University Medical Center Groningen,Department of Epidemiology,Hanzeplein 1,Groningen,The Netherlands
| | - A Aleman
- University of Groningen,University Medical Center Groningen,Department of Neuroscience and BCN Neuroimaging Center,Antonius Deusinglaan 2,Groningen,The Netherlands
| | - H Knegtering
- University of Groningen,University Medical Center Groningen,Department of Psychiatry,Hanzeplein 1,Groningen,The Netherlands
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7
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Korthuis PM, Berger G, Bakker B, Rozenveld-Geugien M, Jaques J, de Haan G, Schuringa JJ, Vellenga E, Schepers H. CITED2-mediated human hematopoietic stem cell maintenance is critical for acute myeloid leukemia. Leukemia 2015; 29:625-35. [PMID: 25184385 DOI: 10.1038/leu.2014.259] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Revised: 08/01/2014] [Accepted: 08/22/2014] [Indexed: 02/07/2023]
Abstract
As the transcriptional coactivator CITED2 (CBP/p300-interacting-transactivator-with-an ED-rich-tail 2) can be overexpressed in acute myeloid leukemia (AML) cells, we analyzed the consequences of high CITED2 expression in normal and AML cells. CITED2 overexpression in normal CD34(+) cells resulted in enhanced hematopoietic stem and progenitor cell (HSPC) output in vitro, as well as in better hematopoietic stem cell (HSC) engraftability in NSG (NOD.Cg-Prkdcscid Il2rgtm1Wjl/SzJ) mice. This was because of an enhanced quiescence and maintenance of CD34(+)CD38(-) HSCs, due in part to an increased expression of the cyclin-dependent kinase inhibitor CDKN1A. We demonstrated that PU.1 is a critical regulator of CITED2, as PU.1 repressed CITED2 expression in a DNA methyltransferase 3A/B (DNMT3A/B)-dependent manner in normal CD34(+) cells. CD34(+) cells from a subset of AML patients displayed higher expression levels of CITED2 as compared with normal CD34(+) HSPCs, and knockdown of CITED2 in AML CD34(+) cells led to a loss of long-term expansion, both in vitro and in vivo. The higher CITED2 expression resulted from reduced PU.1 activity and/or dysfunction of mutated DNMT3A/B. Collectively, our data demonstrate that increased CITED2 expression results in better HSC maintenance. In concert with low PU.1 levels, this could result in a perturbed myeloid differentiation program that contributes to leukemia maintenance.
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MESH Headings
- Animals
- Antigens, CD34/genetics
- Antigens, CD34/metabolism
- Cell Proliferation
- Cyclin-Dependent Kinase Inhibitor p21/genetics
- Cyclin-Dependent Kinase Inhibitor p21/metabolism
- DNA (Cytosine-5-)-Methyltransferases/genetics
- DNA (Cytosine-5-)-Methyltransferases/metabolism
- DNA Methyltransferase 3A
- Female
- Gene Expression Regulation, Leukemic
- Graft Survival
- Hematopoietic Stem Cell Transplantation
- Hematopoietic Stem Cells/metabolism
- Hematopoietic Stem Cells/pathology
- Humans
- Leukemia, Myeloid, Acute/genetics
- Leukemia, Myeloid, Acute/metabolism
- Leukemia, Myeloid, Acute/pathology
- Mice
- Mice, Inbred NOD
- Mutation
- Proto-Oncogene Proteins/genetics
- Proto-Oncogene Proteins/metabolism
- Repressor Proteins/genetics
- Repressor Proteins/metabolism
- Signal Transduction
- Trans-Activators/genetics
- Trans-Activators/metabolism
- Transplantation, Heterologous
- DNA Methyltransferase 3B
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Affiliation(s)
- P M Korthuis
- Department of Experimental Hematology, Cancer Research Center Groningen, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - G Berger
- Department of Experimental Hematology, Cancer Research Center Groningen, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - B Bakker
- Department of Experimental Hematology, Cancer Research Center Groningen, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - M Rozenveld-Geugien
- Department of Experimental Hematology, Cancer Research Center Groningen, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - J Jaques
- Department of Experimental Hematology, Cancer Research Center Groningen, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - G de Haan
- Department of Stem Cell Biology, European Research Institute for the Biology of Aging (ERIBA), University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - J J Schuringa
- Department of Experimental Hematology, Cancer Research Center Groningen, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - E Vellenga
- Department of Experimental Hematology, Cancer Research Center Groningen, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - H Schepers
- Department of Experimental Hematology, Cancer Research Center Groningen, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
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van den Boogaard T, Lemmers R, Camano P, van der Vliet P, Balog J, Voermans N, Tapscott S, de Munain A, Tawil R, Bakker B, Maarel S. G.O.4. Neuromuscul Disord 2014. [DOI: 10.1016/j.nmd.2014.06.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Schulte PFJ, van Dijk D, Cohen D, Bogers J, Bakker B. Comment on 'effectiveness and safety of rapid clozapine titration in schizophrenia'. Acta Psychiatr Scand 2014; 130:69-70. [PMID: 24689810 DOI: 10.1111/acps.12274] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- P F J Schulte
- Dutch Clozapine Collaboration Group, Castricum, the Netherlands; Specialized Treatment Division, Mental Health Service Noord-Holland Noord, Alkmaar, the Netherlands.
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Klein RH, Alvarez-Jimenez R, Sukhai RN, Oostdijk W, Bakker B, Reeser HM, Ballieux BEPB, Hu P, Klaassen ES, Freijer J, Burggraaf J, Cohen AF, Wit JM. Pharmacokinetics and pharmacodynamics of orally administered clonidine: a model-based approach. Horm Res Paediatr 2014; 79:300-9. [PMID: 23735833 DOI: 10.1159/000350819] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2012] [Accepted: 03/13/2013] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND/AIMS The oral clonidine test is a diagnostic procedure performed in children with suspected growth hormone (GH) deficiency. It is associated with untoward effects, including bradycardia, hypotension and sedation. Serum clonidine levels have not previously been assessed during this test. METHODS In 40 children referred for an oral clonidine test, blood samples were drawn for clonidine and GH. Vital statistics and sedation scores were recorded until 210 min post-dose. We explored the relationship between clonidine concentrations and effects such as GH peak and blood pressure. RESULTS Of 40 participants, 5 children were GH deficient. Peak clonidine concentrations of 0.846 ± 0.288 ng/ml were reached after 1 h. Serum levels declined slowly, with concentrations of 0.701 ± 0.189 ng/ml 210 min post-dose. A large interindividual variation of serum levels was observed. During the procedure, systolic blood pressure dropped by 12.8%, diastolic blood pressure by 19.7% and heart rate by 8.4%. Moderate sedation levels were observed. Concentration-effect modeling showed that the amount of GH available for secretion as determined by previous bursts was an important factor influencing GH response. CONCLUSION Clonidine concentrations during the test were higher than necessary according to model-based predictions. A lower clonidine dose may be sufficient and may produce fewer side effects.
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Affiliation(s)
- R H Klein
- Centre for Human Drug Research, Leiden University Medical Center, NL-2300 RC Leiden, The Netherlands.
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van de Ven J, Nilsson S, Tan P, Buitendijk G, Ristau T, Mohlin F, Nabuurs S, Schoenmaker-Koller F, Smailhodzic D, Campochiarro P, Zack D, Duvvari M, Bakker B, Paun C, Boon C, Uitterlinden A, Liakopoulos S, Klevering B, Fauser S, Daha M, Katsanis N, Klaver C, Blom A, Hoyng C, Hollander AD. A functional variant in the CFI gene confers a high risk of age-related macular degeneration. Mol Immunol 2013. [DOI: 10.1016/j.molimm.2013.05.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Talma H, Chinapaw MJM, Bakker B, HiraSing RA, Terwee CB, Altenburg TM. Bioelectrical impedance analysis to estimate body composition in children and adolescents: a systematic review and evidence appraisal of validity, responsiveness, reliability and measurement error. Obes Rev 2013; 14:895-905. [PMID: 23848977 DOI: 10.1111/obr.12061] [Citation(s) in RCA: 132] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Revised: 05/31/2013] [Accepted: 05/31/2013] [Indexed: 12/21/2022]
Abstract
Bioelectrical impedance analysis (BIA) is a practical method to estimate percentage body fat (%BF). In this systematic review, we aimed to assess validity, responsiveness, reliability and measurement error of BIA methods in estimating %BF in children and adolescents.We searched for relevant studies in Pubmed, Embase and Cochrane through November 2012. Two reviewers independently screened titles and abstracts for inclusion, extracted data and rated methodological quality of the included studies. We performed a best evidence synthesis to synthesize the results, thereby excluding studies of poor quality. We included 50 published studies. Mean differences between BIA and reference methods (gold standard [criterion validity] and convergent measures of body composition [convergent validity]) were considerable and ranged from negative to positive values, resulting in conflicting evidence for criterion validity. We found strong evidence for a good reliability, i.e. (intra-class) correlations ≥0.82. However, test-retest mean differences ranged from 7.5% to 13.4% of total %BF in the included study samples, indicating considerable measurement error. Our systematic review suggests that BIA is a practical method to estimate %BF in children and adolescents. However, validity and measurement error are not satisfactory.
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Affiliation(s)
- H Talma
- Department of Public and Occupational Health, EMGO Institute for Health and Care Research, VU University Medical Center, Amsterdam, The Netherlands
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Bogers JPAM, Cohen D, Schulte PFJ, van Dijk D, Bakker B. Clozapine-induced leukopenia: arguments for rechallenge. Ir J Med Sci 2011; 181:155-6. [PMID: 22057637 DOI: 10.1007/s11845-011-0782-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2011] [Accepted: 10/25/2011] [Indexed: 10/15/2022]
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Dikken J, Bakker B, Hartgrink H, Jansen E, Putter H, Boot H, Cats A, van de Velde C, Verheij M. Patterns of Recurrence after Postoperative Chemoradiotherapy in Gastric Cancer. Int J Radiat Oncol Biol Phys 2009. [DOI: 10.1016/j.ijrobp.2009.07.152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Bakker B, Oostdijk W, Geskus RB, Stokvis-Brantsma WH, Vossen JM, Wit JM. Growth hormone (GH) secretion and response to GH therapy after total body irradiation and haematopoietic stem cell transplantation during childhood. Clin Endocrinol (Oxf) 2007; 67:589-97. [PMID: 17590170 DOI: 10.1111/j.1365-2265.2007.02930.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVE In January 1997 we introduced a protocol for the treatment with GH of children with impaired growth after unfractionated total body irradiation (TBI). This study is an evaluation of that protocol. PATIENTS AND METHODS Between January 1997 and July 2005, 66 patients (48 male) treated for haematological malignancies had at least two years of disease-free survival after TBI-based conditioning for stem cell transplantation (SCT). Stimulated and/or spontaneous GH secretion was decreased in 8 of the 29 patients tested because of impaired growth. Treatment with GH (daily dose 1.3 mg/m2 body surface area) was offered to all 29 patients and initiated in 23 of them (17 male). The main outcome measure was the effect of GH therapy on height standard deviation scores (SDS) after onset of GH therapy, estimated by random-effect modelling with corrections for sex, age at time of SCT and puberty (data analysed on intention-to-treat basis). RESULTS At time of analysis, median duration of therapy was 3.2 years; median follow-up after start of GH therapy was 4.2 years. The estimated effect of GH therapy, modelled as nonlinear (logit) curve, was +1.1 SD after 5 years. Response to GH therapy did not correlate to GH secretion status. CONCLUSION GH therapy has a positive effect on height SDS after TBI, irrespective of GH secretion status.
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Affiliation(s)
- B Bakker
- Department of Paediatrics, Leiden University Medical Centre, Leiden, The Netherlands.
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Buzhkov BT, Vŭzharova R, Dimitrova V, Dimova I, Tŭrnev I, van der Wielen M, van der Maarel S, Bakker B. [First facioscapulohumeral muscular dystrophy prenatal diagnosis in a Bulgarian family]. Akush Ginekol (Sofiia) 2005; 44:30-3. [PMID: 15853025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Facioscapulohumeral muscular dystrophy (FSHD) is the third most common myopathy. It is characterized by progressive descendent involvement of facial, shoulder girdle, truncal and lower extremities muscles. FSHD locus was mapped on the terminal part of the long arm of chromosome 4 (4q35). The disease is caused by a deletion of an integral number of tandem D4Z4 repeats and dimension of the pathological fragments < or = 38kb. Prenatal diagnosis of FSHD is possible but it is potentially difficult because of the big amount and high quality of DNA required. Hereby we describe the first prenatal tests performed for a Bulgarian family.
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Kriek M, White SJ, Bouma MC, Dauwerse HG, Hansson KBM, Nijhuis JV, Bakker B, van Ommen GJB, den Dunnen JT, Breuning MH. Genomic imbalances in mental retardation. J Med Genet 2004; 41:249-55. [PMID: 15060096 PMCID: PMC1735748 DOI: 10.1136/jmg.2003.014308] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/08/2022]
Abstract
INTRODUCTION It has been estimated that cytogenetically visible rearrangements are present in approximately 1% of newborns. These chromosomal changes can cause a wide range of deleterious developmental effects, including mental retardation (MR). It is assumed that many other cases exist where the cause is a submicroscopic deletion or duplication. To facilitate the detection of such cases, different techniques have been developed, which have differing efficiency as to the number of loci and patients that can be tested. METHODS We implemented multiplex amplifiable probe hybridisation (MAPH) to test areas known to be rearranged in MR patients (for example, subtelomeric/pericentromeric regions and those affected in microdeletion syndromes) and to look for new regions that might be related to MR. RESULTS In this study, over 30 000 screens for duplications and deletions were carried out; 162 different loci tested in each of 188 developmentally delayed patients. The analysis resulted in the detection of 19 rearrangements, of which approximately 65% would not have been detected by conventional cytogenetic analysis. A significant fraction (46%) of the rearrangements found were interstitial, despite the fact that only a limited number of these loci have so far been tested. DISCUSSION Our results strengthen the arguments for whole genome screening within this population, as it can be assumed that many more interstitial rearrangements would be detected. The strengths of MAPH for this analysis are the simplicity, the high throughput potential, and the high resolution of analysis. This combination should help in the future identification of the specific genes that are responsible for MR.
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Affiliation(s)
- M Kriek
- Center for Human and Clinical Genetics, Leiden University Medical Center, The Netherlands
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19
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Bakker B, Oostdijk W, Bresters D, Walenkamp MJE, Vossen JM, Wit JM. Disturbances of growth and endocrine function after busulphan-based conditioning for haematopoietic stem cell transplantation during infancy and childhood. Bone Marrow Transplant 2004; 33:1049-56. [PMID: 15048143 DOI: 10.1038/sj.bmt.1704481] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
It is generally assumed that busulphan/cyclophoshamide (Bu/Cy)-based conditioning regimens for haematopoietic stem cell transplantation (SCT) do not affect growth. We evaluated growth and endocrine function after Bu/Cy-based conditioning in 64 children without a history of irradiation. Mean height standard deviation scores remained stable, but unexplained disturbances of growth after SCT were found in 17/48 (35%) of the children without growth-limiting disorders (10/23 in patients treated for haematological malignancies). In 10 patients, growth hormone (GH) secretion status was evaluated, and insufficient GH secretion was diagnosed in four patients. Thyroid function was evaluable in 52 patients. Two developed antibody-mediated thyroid disorders and 10 (19%) compensated primary hypothyroidism. Gonadal function was evaluable in 21 patients and was normal in all seven patients treated with low-dose Bu (8 mg/kg), whereas seven of the 14 children receiving high-dose Bu (16-20 mg/kg) developed gonadal failure; the majority of these patients had not been exposed to gonadotoxic therapy prior to Bu/Cy. Of the 49 evaluable patients, 16 developed subclinical hyperparathyroidism. We conclude that, besides gonadal and thyroid dysfunction, impaired growth and hyperparathyroidism often occur after Bu/Cy conditioning for SCT and that growth impairment may be the result of insufficient GH secretion.
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Affiliation(s)
- B Bakker
- Department of Pediatrics, J6-208, Leiden University Medical Center, PO Box 9600, 2300 RC Leiden, The Netherlands.
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20
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Helder DI, Bakker B, de Heer P, van der Veen F, Vossen JMJJ, Wit JM, Kaptein AA. Quality of life in adults following bone marrow transplantation during childhood. Bone Marrow Transplant 2003; 33:329-36. [PMID: 14647247 DOI: 10.1038/sj.bmt.1704345] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
SUMMARY Quality of life (QOL) was assessed in 22 young adults, 14 years - on average- after having received bone marrow transplantation (BMT) during childhood at the Leiden University Medical Center. All were disease-free and >16 years when interviewed. The sickness impact profile and the Medical Outcome Study 36-item Short Form Health Survey were used as generic questionnaires in the assessment of QOL. The Functional Assessment of Cancer Therapy-Bone Marrow Transplant Scale (FACT-BMT) was used as a disease-specific measure of QOL. Coping was assessed by means of the Utrecht coping list. BMT-related variables were obtained from medical files. Of the generic QOL measures, most results fell within the normal range of functioning, although some illness-related impairment was reported on subscales for general and work-related functioning. Compared to a reference sample of patients who had received BMT as adults, patients involved in this study scored significantly higher on the 'emotional well-being' subscale of the FACT-BMT, indicating significantly better emotional functioning. The age at BMT and total body irradiation (TBI) were not related to patients' QOL. We can conclude that at long term, having received BMT during childhood does not negatively affect the QOL of patients. Bone Marrow Transplantation (2004) 33, 329-336. doi:10.1038/sj.bmt.1704345 Published online 1 December 2003
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Affiliation(s)
- D I Helder
- Unit of Psychology, Leiden University Medical Center, The Netherlands
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21
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Bakker B, van der Eerden BCJ, Koppenaal DW, Karperien M, Wit JM. Effect of x-irradiation on growth and the expression of parathyroid hormone-related peptide and Indian hedgehog in the tibial growth plate of the rat. Horm Res Paediatr 2003; 59:35-41. [PMID: 12566733 DOI: 10.1159/000067932] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2001] [Indexed: 11/19/2022] Open
Abstract
AIM To study the effect of irradiation on the longitudinal growth and the expression of parathyroid hormone-related peptide (PTHrP) and Indian hedgehog (IHh) in tibial growth plates of rats. METHODS At 3 weeks of age, 30 male rats received a single fraction of irradiation (8 Gy) to their right hind limb, and small groups of animals were sacrificed 1, 2, 3, 5, 7, 10, 15, and 26 weeks after irradiation. Weight and length of both irradiated and nonirradiated tibiae were measured, and sections of the tibiae were stained with HE. PTHrP and IHh were visualized using immunohistochemical techniques. RESULTS Radiation resulted in persistent growth delay of the irradiated tibiae, with a difference in length of more than 10% between the irradiated and the nonirradiated tibiae 15 weeks or more after irradiation. The growth plate architecture was disturbed, and the expression of both PTHrP and IHh was decreased in the irradiated tibiae. CONCLUSION As PTHrP and IHh are key regulators of both the pace and the synchronization of the differentiation of growth plate chondrocytes, the reduced expression of PTHrP and IHh may contribute to the changes found after irradiation.
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Affiliation(s)
- B Bakker
- Department of Paediatrics, Leiden University Medical Center, Leiden, The Netherlands.
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22
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Abstract
Kinetoplastid protozoa compartmentalize the first seven enzymes of glycolysis and two enzymes of glycerol metabolism in a microbody, the glycosome. While in its mammalian host, Trypanosoma brucei depends entirely on glucose for ATP generation. Under aerobic conditions, most of the glucose is metabolized to pyruvate. Aerobic metabolism depends on the activities of glycosomal triosephosphate isomerase and a mitochondrial glycerophosphate oxidase, and on glycerophosphate<-->dihydroxyacetone phosphate exchange across the glycosomal membrane. Using a combination of genetics and computer modelling, we show that triosephosphate isomerase is probably essential for bloodstream trypanosome survival, but not for the insect-dwelling procyclics, which preferentially use amino acids as an energy source. When the enzyme level decreased to about 15% of that of the wild-type, the growth rate was halved. Below this level, a lethal rise in dihydroxyacetone phosphate was predicted. Expression of cytosolic triosephosphate isomerase inhibited cell growth. Attempts to knockout the trypanosome alternative oxidase genes (which are needed for glycerophosphate oxidase activity) were unsuccessful, but when we lowered the level of the corresponding mRNA by expressing a homologous double-stranded RNA, oxygen consumption was reduced fourfold and the rate of trypanosome growth was halved.
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Affiliation(s)
- S Helfert
- Zentrum für Molekularbiologie der Universität Heidelberg (ZMBH), Im Neuenheimer Feld 282, D-69120 Heidelberg, Germany
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23
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Hendriks-Stegeman BI, Augustijn KD, Bakker B, Holthuizen P, van der Vliet PC, Jansen M. Combined pituitary hormone deficiency caused by compound heterozygosity for two novel mutations in the POU domain of the Pit1/POU1F1 gene. J Clin Endocrinol Metab 2001; 86:1545-50. [PMID: 11297581 DOI: 10.1210/jcem.86.4.7371] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The POU homeodomain containing transcriptional activator POU1F1, formerly called Pit1 or GHF-1, is required for the embryological determination and postnatal secretory function of the GH-, PRL-, and TSH-producing cells in the anterior pituitary. Several mutations in the gene encoding POU1F1 have been described, resulting in a syndrome of combined pituitary hormone deficiency involving these three hormones. Most of the patients with this phenotype have either a dominant negative mutation in codon 271 (R271W) or are homozygous for a recessive mutation in the POU1F1 gene; to date only one case has been reported with compound heterozygosity for two point mutations. Here, we describe a boy with severe deficiencies of GH, PRL, and TSH who had compound heterozygosity for two novel point mutations in the POU1F1 gene: a 1-bp deletion frameshift mutation (747delA), the first one described to date in this gene, which leads to a nonfunctional truncated protein lacking the entire DNA recognition helix of the POU homeodomain, and a missense mutation in the C-terminal end of the fourth alpha-helix of the POU-specific domain (W193R),which causes a 500-fold reduction in the ability to bind to DNA and activate transcription.
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Affiliation(s)
- B I Hendriks-Stegeman
- Department of Pediatric Endocrinology, University Medical Center, 3508 AB Utrecht, The Netherlands
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24
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Bakker B, Bikker H, Hennekam RC, Lommen EJ, Schipper MG, Vulsma T, de Vijlder JJ. Maternal isodisomy for chromosome 2p causing severe congenital hypothyroidism. J Clin Endocrinol Metab 2001; 86:1164-8. [PMID: 11238503 DOI: 10.1210/jcem.86.3.7313] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
Severe congenital hypothyroidism (CH) due to a total iodide organification defect (TIOD) is usually due to mutations in the thyroid peroxidase (TPO) gene located at chromosome 2p25. A homozygous deletion [DeltaT2512 (codon 808)] in exon 14 was identified in a patient with classical TIOD. The transmission pattern of the TPO gene in this family was anomalous; the mother was heterozygous for the deletion; and the mutation was absent in the father. Polymorphic short tandem repeat (STR) markers confirmed paternity and demonstrated on chromosome 2 that the propositus was homozygous for most markers on chromosome 2p and that these were identical to one of the maternal 2p homologs. A normal karyotype was found in the propositus, his parents and sister. We conclude that the homozygosity in the patient is due to partial maternal isodisomy of the short arm of chromosome 2, carrying a defective TPO gene. The patient, born small for gestational age, develops and grows well and appears healthy (while being treated with thyroxine) and has a normal phenotype except for a unilateral preauricular skin tag. This shows that partial maternal isodisomy for chromosome 2p (2pter - 2p12) is compatible with a minimal influence on normal development.
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Affiliation(s)
- B Bakker
- Academic Medical Center, University of Amsterdam, Emma Children's Hospital AMC, Division of Pediatric Endocrinology, 1100 DE Amsterdam, The Netherlands.
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25
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Bakker B, Bikker H, Vulsma T, de Randamie JS, Wiedijk BM, De Vijlder JJ. Two decades of screening for congenital hypothyroidism in The Netherlands: TPO gene mutations in total iodide organification defects (an update). J Clin Endocrinol Metab 2000; 85:3708-12. [PMID: 11061528 DOI: 10.1210/jcem.85.10.6878] [Citation(s) in RCA: 98] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Presented is a cohort study to assess the nature and frequency of thyroid peroxidase (TPO) mutations in 45 patients (35 families) with congenital hypothyroidism due to a total iodide organification defect; incidence is 1:66,000 in The Netherlands. The presentation is consistently similar with a severe form of congenital hypothyroidism and also characterized by a complete and immediate release of accumulated radioiodide from the thyroid after sodium perchlorate administration. Sixteen different mutations were found, including eight novel mutations; the majority occurs in exons 8, 9, or 10. The GGCC insertion in exon 8 at nucleotide 1277, leading to an early termination signal in exon 9, is the most frequently occurring mutation. These mutations were detected in 29 families in both TPO alleles (13 homozygous and 16 compound heterozygous). In one family, partial maternal isodisomy of 2p was detected, in four families only one mutated TPO allele could be detected, and in one family no inactivating TPO mutation could be found. Because all patients clearly had the clinicopathologic features of a total iodide organification defect, we conclude that in these five families the mutations in the (other) alleles could be either located in the intronic sequences or in the promoter region. Mutations in the TPO gene result in total iodide organification defects.
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Affiliation(s)
- B Bakker
- Academic Medical Center, University of Amsterdam, Emma Children's Hospital AMC, Division of Pediatric Endocrinology, The Netherlands
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26
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Berns EM, Foekens JA, Vossen R, Look MP, Devilee P, Henzen-Logmans SC, van Staveren IL, van Putten WL, Inganäs M, Meijer-van Gelder ME, Cornelisse C, Claassen CJ, Portengen H, Bakker B, Klijn JG. Complete sequencing of TP53 predicts poor response to systemic therapy of advanced breast cancer. Cancer Res 2000; 60:2155-62. [PMID: 10786679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
TP53 has been implicated in regulation of the cell cycle, DNA repair, and apoptosis. We studied, in primary breast tumors through direct cDNA sequencing of exons 2-11, whether TP53 gene mutations can predict response in patients with advanced disease to either first-line tamoxifen therapy (202 patients, of whom 55% responded) or up-front (poly)chemotherapy (41 patients, of whom 46% responded). TP53 mutations were detected in 90 of 243 (37%) tumors, and one-fourth of these mutations resulted in a premature termination of the protein. The mutations were observed in 32% (65 of 202) of the primary tumors of tamoxifen-treated patients and in 61% (25 of 41) of the primary tumors of the chemotherapy patients. TP53 mutation was significantly associated with a poor response to tamoxifen [31% versus 66%; odds ratio (OR), 0.22; 95% confidence interval (CI), 0.12-0.42; P < 0.0001]. Patients with TP53 gene mutations in codons that directly contact DNA or with mutations in the zinc-binding domain loop L3 showed the lowest response to tamoxifen (18% and 15% response rates, respectively). TP53 mutations were related, although not significantly, to a poor response to up-front chemotherapy (36% versus 63%; OR, 0.34; 95% CI, 0.09-1.24). In multivariate analysis for response including the classical parameters age and menopausal status, disease-free interval, dominant site of relapse, and levels of estrogen receptor and progesterone receptor, TP53 mutation was a significant predictor of poor response in the tamoxifen-treated group (OR, 0.29; 95% CI, 0.13-0.63; P = 0.0014). TP53-mutated and estrogen receptor-negative (<10 fmol/mg protein) tumors appeared to be the most resistant phenotype. Interestingly, the response of patients with TP53 mutations to chemotherapy after tamoxifen was not worse than that of patients without these mutations (50% versus 42%; OR, 1.35, nonsignificant). The median progression-free survival after systemic treatment was shorter for patients with a TP53 mutation than for patients with wild-type TP53 (6.6 and 0.6 months less for tamoxifen and up-front chemotherapy, respectively). In conclusion, TP53 gene mutation of the primary tumor is helpful in predicting the response of patients with metastatic breast disease to tamoxifen therapy. The type of mutation and its biological function should be considered in the analyses of the predictive value of TP53.
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Affiliation(s)
- E M Berns
- Department of Medical Oncology, Rotterdam Cancer Institute (Daniel de Hoed Kliniek)/University Hospital Rotterdam, The Netherlands.
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27
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van der Maarel SM, Deidda G, Lemmers RJ, van Overveld PG, van der Wielen M, Hewitt JE, Sandkuijl L, Bakker B, van Ommen GJ, Padberg GW, Frants RR. De novo facioscapulohumeral muscular dystrophy: frequent somatic mosaicism, sex-dependent phenotype, and the role of mitotic transchromosomal repeat interaction between chromosomes 4 and 10. Am J Hum Genet 2000; 66:26-35. [PMID: 10631134 PMCID: PMC1288331 DOI: 10.1086/302730] [Citation(s) in RCA: 90] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/1999] [Accepted: 10/01/1999] [Indexed: 12/14/2022] Open
Abstract
Autosomal dominant facioscapulohumeral muscular dystrophy (FSHD) is caused by deletion of most copies of the 3.3-kb subtelomeric D4Z4 repeat array on chromosome 4q. The molecular mechanisms behind the deletion and the high proportion of new mutations have remained elusive. We surveyed 35 de novo FSHD families and found somatic mosaicism in 40% of cases, in either the patient or an asymptomatic parent. Mosaic males were typically affected; mosaic females were more often the unaffected parent of a nonmosaic de novo patient. A genotypic-severity score, composed of the residual repeat size and the degree of somatic mosaicism, yields a consistent relationship with severity and age at onset of disease. Mosaic females had a higher proportion of somatic mosaicism than did mosaic males. The repeat deletion is significantly enhanced by supernumerary homologous repeat arrays. In 10% of normal chromosomes, 4-type repeat arrays are present on chromosome 10. In mosaic individuals, 4-type repeats on chromosome 10 are almost five times more frequent. The reverse configuration, also 10% in normal chromosomes, was not found, indicating that mutations may arise from transchromosomal interaction, to which the increase in 4-type repeat clusters is a predisposing factor. The somatic mosaicism suggests a mainly mitotic origin; mitotic interchromosomal gene conversion or translocation between fully homologous 4-type repeat arrays may be a major mechanism for FSHD mutations.
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Affiliation(s)
- S M van der Maarel
- Leiden University Medical Center, Medical Genetics Centre-Department of Human and Clinical Genetics, 2333 AL Leiden, The Netherlands.
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Bakker B, Massa GG, Oostdijk W, Van Weel-Sipman MH, Vossen JM, Wit JM. Pubertal development and growth after total-body irradiation and bone marrow transplantation for haematological malignancies. Eur J Pediatr 2000; 159:31-7. [PMID: 10653326 DOI: 10.1007/s004310050006] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
UNLABELLED Pubertal development after total-body irradiation (TBI) was investigated in 40 children (21 boys) treated with allogeneic bone marrow transplantation (BMT) for haematological malignancies at a mean age of 11.3 years. The mean age at the last visit was 19.0 years. Twenty-five patients (15 boys) were prepubertal at BMT. Data on secondary sexual characteristics, the pituitary-gonadal axis and longitudinal growth were retrospectively collected from the medical records. In boys not receiving additional testicular irradiation (n = 19), penile growth and pubic hair development was normal and all had serum testosterone levels within the adult range. The majority of them, however, had incidental elevations of LH, suggesting minor Leydig cell damage. Testicular volume at last measurement was small (mean: 10.5 ml) and serum FSH levels were elevated in all boys, with normalisation in only one, suggesting severe impairment of reproductive gonadal function. Of the ten girls who received BMT before puberty, six had a spontaneous onset of puberty and menarche; the four other girls needed hormonal substitution therapy. Recovery of gonadal function after cessation of substitution was seen in one girl, who became pregnant but had a spontaneous abortion. Decrease in height SDS was seen in the majority of patients and was positively correlated with male gender and lower age at the time of BMT. CONCLUSION Careful monitoring of both gonadal function and growth after bone marrow transplantation and total body irradiation is warranted in order to detect disturbances early and ensure normal pubertal development in children treated for haematological malignancies.
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Affiliation(s)
- B Bakker
- Department of Paediatrics, Leiden University Medical Centre, The Netherlands.
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Vossen JM, Brinkman DM, Bakker B, Hoogerbrugge PM, ten Cate R. Rationale for high-dose cyclophosphamide and medium-dose total body irradiation in the conditioning of children with progressive systemic and polyarticular juvenile chronic arthritis before autologous stem cell transplantation. Rheumatology (Oxford) 1999; 38:762-3. [PMID: 10501429 DOI: 10.1093/rheumatology/38.8.762] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- J M Vossen
- Department of Paediatrics, Leiden University Medical Centre, The Netherlands
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Cohen A, Rovelli A, Bakker B, Uderzo C, van Lint MT, Esperou H, Gaiero A, Leiper AD, Dopfer R, Cahn JY, Merlo F, Kolb HJ, Socié G. Final height of patients who underwent bone marrow transplantation for hematological disorders during childhood: a study by the Working Party for Late Effects-EBMT. Blood 1999; 93:4109-15. [PMID: 10361107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023] Open
Abstract
Few data are available on the long-term effect of bone marrow transplantation (BMT) on growth. This study examines those factors that play a role in the final height outcome of patients who underwent BMT during childhood. Data on 181 of 230 patients with aplastic anemia, leukemias, and lymphomas who had BMT before puberty (mean age, 9.8 +/- 2.6 years) and who had reached their final height were analyzed. An overall decrease in final height standard deviation score (SDS) value was found compared with the height at BMT (P < 10(7)) and with the genetic height (P < 10(7)). Girls did better than boys, and the younger in age the person was at time of BMT, the greater the loss in height. Previous cranial irradiation + single-dose total body irradiation (TBI) caused the greatest negative effect on final height achievement (P < 10(4)). Fractionation of TBI reduces this effect significantly and conditioning with busulfan and cyclophosphamide seems to eliminate it. The type of transplantation, graft-versus-host disease, growth hormone, or steroid treatment did not influence final height. Irradiation, male gender and young age at BMT were found to be major factors for long-term height loss. Nevertheless, the majority of patients (140/181) have reached adult height within the normal range of the general population.
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Affiliation(s)
- A Cohen
- University Department of Pediatrics, Gaslini Institute, Children's Hospital, Genoa, Italy.
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31
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Bakker B, Massa GG, van Rijn AM, Mearadji A, van der Kamp HJ, Niemer-Tucker MM, van der Hage MH, Broerse JJ, Wit JM. Effects of total-body irradiation on growth, thyroid and pituitary gland in rhesus monkeys. Radiother Oncol 1999; 51:187-92. [PMID: 10435812 DOI: 10.1016/s0167-8140(99)00059-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE To investigate the effect of total-body irradiation (TBI) on growth, thyroid and pituitary gland in primates. METHODS AND MATERIALS Thirty-seven rhesus monkeys (mean age 3.1+/-0.6 years) received either a low-dose (4-6 Gy) TBI (n = 26) or high-dose (7-12 Gy) TBI (n = 11) and were sacrificed together with 8 age-matched controls after a post-irradiation interval of 5.9+/-1.5 years. Anthropometric data were collected: thyroid and pituitary glands were examined; serum levels of thyroid stimulating hormone (TSH), free thyroxin (FT4), insulin-like growth factor-I (IGF-I) and its binding protein-3 (IGFBP-3) were measured. RESULTS Decrease in final height due to irradiation could not be demonstrated. There was a dose-dependent decrease in body weight, ponderal index, skinfold thickness and thyroid weight. The latter was not accompanied by elevation of TSH or decrease in FT4. Structural changes in the thyroid gland were found in 50% of the irradiated animals. Levels of IGF-I and IGFBP-3 did not differ between the dose groups, but the high-dose group had a lower IGF-1/IGFBP-3 ratio. CONCLUSION Total body irradiation had a negative effect on body fat. There was no evidence of (compensated) hypothyroidism, but dose-dependent decrease in thyroid weight and changes in follicular structure suggest some effect of TBI on the thyroid gland. The decreased IGF-I/IGFBP-3 ratio in the high-dose group can indicate that the somatotrophic axis was mildly affected by TBI. These results show that TBI can have an effect on the physical build and thyroid gland of primates even in the absence of cytostatic agents or immunosuppressive drugs.
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Affiliation(s)
- B Bakker
- Department of Pediatrics, Leiden University Medical Center, The Netherlands
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Bakker B, Vulsma T, de Randamie J, Achterhuis AM, Wiedijk B, Oosting H, Glas C, de Vijlder JJ. A negative iodine balance is found in healthy neonates compared with neonates with thyroid agenesis. J Endocrinol 1999; 161:115-20. [PMID: 10194535 DOI: 10.1677/joe.0.1610115] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
We studied the effects of the presence or absence of the thyroid gland on the iodine metabolism and excretion in term Dutch newborns by performing a retrospective study of the urinary iodine excretion in 193 term newborns with abnormal congenital hypothyroidism screening results. Thirty-six euthyroid newborns with decreased thyroxine-binding globulin levels were compared with 157 hypothyroid patients, 54 due to thyroid agenesis and 103 due to thyroid dysgenesis. A significant difference in the urinary iodine excretion was observed between the agenesis group (mean: 28 micrograms/24 h) and the euthyroid newborns (mean: 46 micrograms/24 h, P=0.001). In conclusion, healthy, euthyroid, term newborns excreted more iodine in their urine than newborns with thyroid agenesis. These results strongly indicated the existence of a temporarily negative iodine balance: the excretion of iodine prevailed over the intake and the newborn's thyroidal iodine, stored during pregnancy, could be used for thyroxine synthesis in the postnatal period. Since healthy term neonates were able to maintain adequate plasma free thyroxine concentrations under normal TSH stimulation, the prenatally acquired iodine stores could be considered sufficiently high to compensate for the transient postnatal losses.
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Affiliation(s)
- B Bakker
- Academic Medical Center, University of Amsterdam, Emma Children's Hospital AMC, Division of Pediatric Endocrinology, Amsterdam, The Netherlands
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Losekoot M, Bakker B, Laccone F, Stenhouse S, Elles R. A European pilot quality assessment scheme for molecular diagnosis of Huntington's disease. Eur J Hum Genet 1999; 7:217-22. [PMID: 10196706 DOI: 10.1038/sj.ejhg.5200252] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
This paper reports a European pilot External Quality Assessment (EQA) scheme for the molecular diagnosis of Huntington's disease (HD). The European Molecular Genetics Quality Network (EMQN) chose HD as a relatively simple assay that allows a range of difficulty in terms of technical competence and interpretation. Fourteen centres from 12 different countries participated. The scheme organiser provided five cases together with mock clinical information. The participating laboratories were asked to complete the analyses and return the reports in English to their normal laboratory format within a fixed period. The scheme demonstrates a level of potential misdiagnosis in molecular analysis of HD as well as a wide variety in way of reporting laboratory results. Overall 9/146 (6.2%) of alleles fell outside the set limits, and the rate of misdiagnosis was 1/78 (1.3%). A closer estimate of diagnostic accuracy will require expansion of the scheme.
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Affiliation(s)
- M Losekoot
- MGC-Department of Human Genetics, Leiden University Medical Centre, The Netherlands
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Bakker B, Massa GG, Oostdijk W, Vossen JM, van Weel-Sipman MH, Wit JM. Gonadal function and bone marrow transplantation. J Pediatr 1997; 131:651-2. [PMID: 9386682 DOI: 10.1016/s0022-3476(97)70088-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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35
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Wijnen J, Khan PM, Vasen H, van der Klift H, Mulder A, van Leeuwen-Cornelisse I, Bakker B, Losekoot M, Møller P, Fodde R. Hereditary nonpolyposis colorectal cancer families not complying with the Amsterdam criteria show extremely low frequency of mismatch-repair-gene mutations. Am J Hum Genet 1997; 61:329-35. [PMID: 9311737 PMCID: PMC1715907 DOI: 10.1086/514847] [Citation(s) in RCA: 170] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Hereditary nonpolyposis colorectal cancer (HNPCC) is a common autosomal dominant cancer-susceptibility condition characterized by early onset colorectal cancer. Germ-line mutations in one of four DNA mismatch repair (MMR) genes, hMSH2, hMLH1, hPMS1, or hPMS2, are known to cause HNPCC. Although many mutations in these genes have been found in HNPCC kindreds complying with the so-called Amsterdam criteria, little is known about the involvement of these genes in families not satisfying these criteria but showing clear-cut familial clustering of colorectal cancer and other cancers. Here, we applied denaturing gradient-gel electrophoresis to screen for hMSH2 and hMLH1 mutations in two sets of HNPCC families, one set comprising families strictly complying with the Amsterdam criteria and another set in which at least one of the criteria was not satisfied. Interestingly, hMSH2 and hMLH1 mutations were found in 49% of the kindreds fully complying with the Amsterdam criteria, whereas a disease-causing mutation could be identified in only 8% of the families in which the criteria were not satisfied fully. In correspondence with these findings, 4 of 6 colorectal tumors from patients belonging to kindreds meeting the criteria showed microsatellite instability, whereas only 3 of 11 tumors from the other set of families demonstrated this instability. Although the number of tumors included in the study admittedly is small, the frequencies of mutations in the MMR genes show obvious differences between the two clinical sets of families. These results also emphasize the practical importance of the Amsterdam criteria, which provide a valid clinical subdivision between families, on the basis of their chance of carrying an hMSH2 or an hMLH1 mutation, and which bear important consequences for genetic testing and counseling and for the management of colorectal cancer families.
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Affiliation(s)
- J Wijnen
- MGC-Department of Human Genetics, Medical Genetics Center, Leiden University, The Netherlands
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36
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van Tijn DA, Bakker B, Vulsma T. Hypothyroidism: what is the central issue? J Pediatr 1996; 129:480-3. [PMID: 8804348 DOI: 10.1016/s0022-3476(96)70101-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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37
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Van de Vosse E, Bergen AA, Meershoek EJ, Oosterwijk JC, Gregory S, Bakker B, Weissenbach J, Coffey AJ, van Ommen GJ, Den Dunnen JT. An Xp22.1-p22.2 YAC contig encompassing the disease loci for RS, KFSD, CLS, HYP and RP15: refined localization of RS. Eur J Hum Genet 1996; 4:101-4. [PMID: 8744027 DOI: 10.1159/000472177] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
To facilitate the positional cloning of the genes involved in retinoschisis (RS), keratosis follicularis spinulosa decalvans (KFSD), Coffin-Lowry syndrome (CLS), X-linked hypophosphatemic rickets (XLH, locus name HYP) and X-linked dominant cone-rod degeneration (locus name RP15), we have extended the molecular map of the Xp22 region. Screening of several YAC libraries allowed us to identify 156 YACs, 52 of which localize between markers DXS414 (P90) and DXS451 (kQST80H1). Analysis of their marker content facilitated the construction of a YAC contig from the region spanning (in this order): DXS414 - DXS987 - DXS207 - DXS1053 - DXS197 - DXS 43 - DXS1195 - DXS418 - DXS999 - PDHA1 - DXS7161 - DXS443 - DXS 7592 - DXS1229 - DXS365 - DXS7101 - DXS7593 - DXS1052 - DXS274 - DXS989 - DXS451. The region between DXS414 and DXS451 covers about 4.5-5 Mb. Two additional markers (DXS7593 and DXS7592) were placed in the region, thereby increasing the genetic resolution. Using the deduced marker order, the analysis of key recombinants in families segregating RS allowed us to refine the critical region for RS to 0.6 Mb, between DXS418 and DXS7161.
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Niemer-Tucker MM, Sluysmans MM, Bakker B, Davelaar J, Zurcher C, Broerse JJ. Long-term consequences of high-dose total-body irradiation on hepatic and renal function in primates. Int J Radiat Biol 1995; 68:83-96. [PMID: 7629442 DOI: 10.1080/09553009514550961] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Radiation effects in non-human primates were studied in order to define the long-term risk of total-body irradiation (TBI) for bone marrow transplantation patients. The long-term effects of TBI could be investigated by keeping 84 monkeys of different ages, from an experiment on acute effects, under continuous observation for a period up to 25 years. The control group consisted of non-irradiated monkeys with a comparable age distribution and identical housing conditions. Since radiation was the common toxic agent, the different age groups provided the possibility to investigate the occurrence of deterministic effects after TBI. In the present study emphasis was placed on the assessment of hepatic and renal function and the associated histopathology. The values of the liver function parameters, such as alkaline phosphatase and gamma glutamyl transferase in the irradiated group were significantly increased after TBI (p < 0.05). Also the parameters of kidney dysfunction, e.g. haematocrit and blood urea nitrogen showed a significant change in the irradiated old-aged (post-irradiated interval > 15 years) cohort (p < 0.005). The impairment of the liver and renal functions, did not lead to clinical symptoms and were only associated with mild morphologic changes in the irradiated group of monkeys. In the population of bone marrow transplant patients treated with TBI, alterations in hepatic and renal function parameters after a post-irradiated interval of > 10 years can be anticipated. This could have consequences for the tolerance and toxicity of a broad range of drugs to be administered as additional medications.
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Affiliation(s)
- M M Niemer-Tucker
- Department of Clinical Oncology, University Hospital, Leiden, The Netherlands
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39
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Hogervorst FB, Cornelis RS, Bout M, van Vliet M, Oosterwijk JC, Olmer R, Bakker B, Klijn JG, Vasen HF, Meijers-Heijboer H. Rapid detection of BRCA1 mutations by the protein truncation test. Nat Genet 1995; 10:208-12. [PMID: 7663517 DOI: 10.1038/ng0695-208] [Citation(s) in RCA: 214] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
More than 75% of the reported mutations in the hereditary breast and ovarian cancer gene, BRCA1, result in truncated proteins. We have used the protein truncation test (PTT) to screen for mutations in exon 11, which encodes 61% of BRCA1. In 45 patients from breast and/or ovarian cancer families we found six novel mutations: two single nucleotide insertions, three small deletions (1-5 bp) and a nonsense mutation identified two unrelated families. Furthermore, we were able to amplify the remaining coding region by RT-PCR using lymphocyte RNA. Combined with PTT, we detected aberrantly spliced products affecting exons 5 and 6 in one of two BRCA1-linked families examined. The protein truncation test promises to become a valuable technique in detecting BRCA1 mutations.
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Affiliation(s)
- F B Hogervorst
- MGC-Department of Human Genetics, University of Leiden, The Netherlands
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Dawson-Falk KL, Wright AM, Bakker B, Pitlick PT, Wilson DM, Rosenfeld RG. Cardiovascular evaluation in Turner syndrome: utility of MR imaging. Australas Radiol 1992; 36:204-9. [PMID: 1445102 DOI: 10.1111/j.1440-1673.1992.tb03152.x] [Citation(s) in RCA: 83] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Forty patients with karyotypically proven Turner syndrome were prospectively studied using magnetic resonance imaging (MRI) and echocardiography in order to determine the frequency of cardiovascular anomalies and to assess the utility of both imaging modalities as methods for cardiovascular evaluation in Turner syndrome. Cardiovascular anomalies were found in 45% of patients. A high absolute prevalence of bicuspid aortic valve (17.5%) and aortic coarctation (12.5%) were observed relative to comparable series. Of clinically significant abnormalities, three of five aortic coarctations and four of five ascending aortic dilatations were solely MRI detected and not evident at echocardiographic examination. MRI is thus seen as a valuable adjunct to echocardiography in the cardiovascular evaluation of Turner syndrome patients. The usefulness of MRI primarily relates to its ability to provide excellent visualisation of the entire thoracic aorta where a large proportion of clinically significant anomalies occur in Turner syndrome.
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Affiliation(s)
- K L Dawson-Falk
- Department of Diagnostic Radiology, Stanford University School of Medicine, California 94305
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den Dunnen JT, Casula L, Makover A, Bakker B, Yaffe D, Nudel U, van Ommen GJ. Mapping of dystrophin brain promoter: a deletion of this region is compatible with normal intellect. Neuromuscul Disord 1991; 1:327-31. [PMID: 1822342 DOI: 10.1016/0960-8966(91)90118-c] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Using a mouse genomic fragment containing the brain-specific promoter region of the dystrophin gene, we have located the brain promoter 75-300 kb proximal of the muscle promoter. Within our DMD-families we detected a patient who lacks both the brain-specific and muscle-specific promoter sequences. The normal intellectual capabilities of the patient argue against an indispensable role of the brain-specific first exon in mental functioning. The possibility exists that a NH2-terminally truncated dystrophin has taken over the function of the normal dystrophins in brain and/or muscle.
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Affiliation(s)
- J T den Dunnen
- Department of Human Genetics, Leiden University, The Netherlands
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De Leon DD, Bakker B, Wilson DM, Lamson G, Rosenfeld RG. Insulin-like growth factor binding proteins in human breast cancer cells: relationship to hIGFBP-2 and hIGFBP-3. J Clin Endocrinol Metab 1990; 71:530-2. [PMID: 1696278 DOI: 10.1210/jcem-71-2-530] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Human breast cancer cells (HBCC) secrete at least four different forms of IGFBPs. We have previously demonstrated that hIGFBP-1 is a minor component of IGFBPs secreted by Hs578T cells and is absent in CM from MCF-7 cells. In our present report, we describe the immunological and structural relationship of HBCC IGFBPs to hIGFBP-2 and hIGFBP-3. Analysis of conditioned media (CM) from Hs578T by Western ligand blotting revealed three IGFBPs of apparent Mr = 38K, 28K, and 24K; CM from MCF-7 revealed only two IGFBPs, of apparent Mr = 31K and 24K. Immunoprecipitation studies with polyclonal antibodies raised against hIGFBP-2 and hIGFBP-3 demonstrated that the 38K IGFBP in Hs578T CM is immunologically related to hIGFBP-3, while the 31K IGFBP in MCF-7 cells is related to the hIGFBP-2. Analysis by Northern blot demonstrated that MCF-7 cells contained mRNA for hIGFBP-2, while Hs578T cells contained the mRNA characteristic of the hIGFBP-3. The identity of the 24K IGFBP remains unknown, and may represent a distinct IGFBP. Of note, assay of CM following removal of BPs by acid chromatography demonstrated no detectable IGF-I or -II. The role of these IGFBPs in HBCC is of interest in view of the potential modulation of IGF actions by these proteins.
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Affiliation(s)
- D D De Leon
- Department of Pediatrics, Stanford University Medical School, California 94305
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De Leon DD, Wilson DM, Bakker B, Lamsom G, Hintz RL, Rosenfeld RG. Characterization of insulin-like growth factor binding proteins from human breast cancer cells. Mol Endocrinol 1989; 3:567-74. [PMID: 2473392 DOI: 10.1210/mend-3-3-567] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The insulin-like growth factor binding proteins (IGF-BPs) are structurally and immunologically distinct from the IGF type 1 or type 2 receptors and are characterized by two major forms: a large, GH-dependent BP found in human plasma (Mr = 150 k) and a small GH-independent BP (Mr = 28-42 k) present in human plasma, amniotic fluid, and HEP G2 cells. Using affinity cross-linking techniques, we have identified several binding proteins secreted by human breast cancer cell lines (Hs578T, MDA-231, T-47D, and MCF-7). Under nonreducing conditions these proteins migrated at an apparent Mr = 35, 28, 27, and 24 k, while reducing conditions revealed bands of apparent Mr = 35, 32, 27, and 24 k. Competitive binding studies in T-47D-conditioned media demonstrated that these BPs bound more IGF-II than IGF-I, and that IGF-II potently inhibited binding of either IGF-I or -II. Immunological studies using a polyclonal antibody against the HEP G2 small BP revealed no immunoreactive BP in conditioned media from MCF-7 and T-47D and only slight immunoreactivity in conditioned media from Hs578T and MDA 231. Analysis by Northern blot, using a probe from the cDNA sequence of the HEP G2 BP, demonstrated that Hs578T and MDA-231 cell lines contained small amounts of the 1.65 kilobase mRNA characteristic of the HEP G2 BP, while MCF-7 and T-47D tested negative.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- D D De Leon
- Department of Pediatrics, Stanford University Medical Center, California 94305
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45
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De Leon DD, Bakker B, Wilson DM, Hintz RL, Rosenfeld RG. Demonstration of insulin-like growth factor (IGF-I and -II) receptors and binding protein in human breast cancer cell lines. Biochem Biophys Res Commun 1988; 152:398-405. [PMID: 2451917 DOI: 10.1016/s0006-291x(88)80727-7] [Citation(s) in RCA: 78] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The insulin like growth factors (IGFs), potent mitogens for a variety of normal and transformed cells, have been reported to be secreted by several human breast cancer cell lines (BC). We have investigated the binding characteristics of IGF-I and -II in four human BC: MCF-7, T-47D, MDA 231 and Hs578T. Binding studies in microsomal membrane preparations detected high specific binding for both IGF in all four BC studied. Cross-linking with 125I-IGF-I, followed by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) under reduced conditions, revealed the presence of an alpha subunit of apparent Mr = 130,000 in MCF-7, T-47D and MDA 213 cells. When 125I-IGF-II was cross-linked, a major band of apparent Mr = 260,000 was seen in all BC. This band was inhibited by IGF-II, but not by insulin. Cross-linking of 125I-IGF-I to conditioned media from BC demonstrated the presence of three binding proteins of apparent Mr = 45,000, 36,000 and 29,000 in all BC but T-47D, in which the 36,000 band was not seen. These data demonstrate that BC possess classical receptors for both IGF-I and -II and, furthermore, that BC produce specific binding proteins for these growth factors.
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Affiliation(s)
- D D De Leon
- Department of Pediatrics, Stanford University Medical Center, California 94305
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Smout AJ, Bakker B. [Agranulocytosis caused by cimetidine]. Ned Tijdschr Geneeskd 1981; 125:2152-4. [PMID: 7322239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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