1
|
Stuijt DG, Bos M, Nikkels PGJ, Wolterbeek R, van der Meeren LE. Significant association between circumvallate placenta, placental abruption and acute chorioamnionitis in preterm birth: A 23-year retrospective cohort study. Placenta 2024; 146:25-29. [PMID: 38160600 DOI: 10.1016/j.placenta.2023.12.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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] [Received: 05/11/2023] [Revised: 11/28/2023] [Accepted: 12/14/2023] [Indexed: 01/03/2024]
Abstract
AIM circumvallate placenta, placental abruption and acute chorioamnionitis separately are associated with unfavourable clinical outcomes. We aimed to determine the prevalence and define whether an association exists between the three abnormalities. METHODS 16,042 placenta pathology reports between 1997 and 2020 from a tertiary care centre in the Netherlands were retrospectively analysed. For the statistical analysis, the chi-square test and bootstrapping were used to evaluate an association. RESULTS In our cohort the prevalence of circumvallate placenta is 2.2 %, placental abruption cases 4.0 % and acute chorioamnionitis 20.6 %. We observed a statistically significant association between all three placental abnormalities: circumvallate placenta, placental abruption and acute chorioamnionitis. In addition, there was also an association between circumvallate placenta and acute chorioamnionitis. CONCLUSION Our results show that combined presence of circumvallate placenta, placental abruption and acute chorioamnionitis are associated in preterm birth (p = 0.001). A remarkable finding is that the combination of all three abnormalities (circumvallate placenta, placental abruption and acute chorioamnionitis) was not observed in term pregnancies >37 weeks.
Collapse
Affiliation(s)
- D G Stuijt
- Department of Pathology, Leiden University Medical Centre, 2333 ZA, Leiden, the Netherlands
| | - M Bos
- Department of Pathology, Leiden University Medical Centre, 2333 ZA, Leiden, the Netherlands; Department of Obstetrics and Gynaecology, Leiden University Medical Centre, 2333 ZA, Leiden, the Netherlands
| | - P G J Nikkels
- Department of Pathology, University Medical Centre Utrecht, Utrecht, the Netherlands
| | - R Wolterbeek
- Department of Biomedical Data Sciences, Leiden University Medical Centre, 2333 ZA, Leiden, the Netherlands
| | - L E van der Meeren
- Department of Pathology, Leiden University Medical Centre, 2333 ZA, Leiden, the Netherlands; Department of Pathology, Erasmus Medical Centre, Rotterdam, the Netherlands.
| |
Collapse
|
2
|
Bos M, Koenders MJM, Dijkstra KL, van der Meeren LE, Nikkels PGJ, Bloemenkamp KWM, Eikmans M, Baelde HJ, van der Hoorn MLP. The severity of chronic histiocytic intervillositis is associated with gestational age and fetal weight. Placenta 2023; 131:28-35. [PMID: 36473391 DOI: 10.1016/j.placenta.2022.11.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 06/08/2022] [Revised: 10/20/2022] [Accepted: 11/25/2022] [Indexed: 11/30/2022]
Abstract
INTRODUCTION Chronic histiocytic intervillositis (CHI) is a rare histopathological lesion in the placenta that is associated with poor reproductive outcomes. The intervillous infiltrate consists mostly of maternal mononuclear cells and fibrin depositions, which are both indicators for the severity of the intervillous infiltrate. The severity of the intervillous infiltrate as well as the clinical outcomes of pregnancy differ between cases. Our objective is to determine the relation between the severity of the intervillous infiltrate and the clinical outcomes of CHI. METHODS Cases of CHI were semi-quantitatively graded based on histopathological severity scores. Hereto, CD68 positive mononuclear cells were quantified, fibrin depositions visualized by both a PTAH stain and an immuohistochemical staining, and placental dysfunction was assessed via thrombomodulin staining. RESULTS This study included 36 women with CHI. A higher CD68 score was significantly associated with a lower birthweight. Loss of placental thrombomodulin was associated with lower gestational age, lower birthweight, and a lower placenta weight. The combined severity score based on CD68 and PTAH was significantly associated with fetal growth restriction, and the joint score of CD68 and fibrin was associated with birthweight and placental weight. DISCUSSION More severe intervillous infiltrates in CHI placentas is associated with a lower birth weight and placental weight. Furthermore, this study proposes thrombomodulin as a possible new severity marker of placental damage. More research is needed to better understand the pathophysiology of CHI.
Collapse
Affiliation(s)
- M Bos
- Department of Pathology, Leiden University Medical Center, the Netherlands; Department of Obstetrics and Gynaecology, Leiden University Medical Center, the Netherlands
| | - M J M Koenders
- Department of Obstetrics and Gynaecology, Leiden University Medical Center, the Netherlands
| | - K L Dijkstra
- Department of Pathology, Leiden University Medical Center, the Netherlands
| | - L E van der Meeren
- Department of Pathology, Leiden University Medical Center, the Netherlands; Department of Pathology, University Medical Center Utrecht, the Netherlands
| | - P G J Nikkels
- Department of Pathology, University Medical Center Utrecht, the Netherlands
| | - K W M Bloemenkamp
- Department of Obstetrics, Birth Center Wilhelmina's Children Hospital, Division Woman and Baby, University Medical Center Utrecht, the Netherlands
| | - M Eikmans
- Department of Immunology, Leiden University Medical Center, the Netherlands
| | - H J Baelde
- Department of Pathology, Leiden University Medical Center, the Netherlands
| | - M L P van der Hoorn
- Department of Obstetrics and Gynaecology, Leiden University Medical Center, the Netherlands.
| |
Collapse
|
3
|
van den Heuvel FMA, Bos M, Geuzebroek GSC, Aarntzen EHJG, Maat I, Dieker HJ, Verkroost M, Rodwell L, Ten Oever J, van Crevel R, Habets J, Kouijzer IJE, Nijveldt R. The impact of implementing an endocarditis team in comparison to the classic heart team in a tertiary referral centre. BMC Cardiovasc Disord 2022; 22:114. [PMID: 35300594 PMCID: PMC8931961 DOI: 10.1186/s12872-022-02558-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 03/13/2022] [Indexed: 11/10/2022] Open
Abstract
Background Infective endocarditis (IE) is a complex disease for which the European Society of Cardiology guideline recommends a dedicated multidisciplinary endocarditis team (ET) approach since 2015. It is currently unknown whether this ET approach is beneficial compared to a classic heart team approach including bedside consultation by an infectious disease specialist in Western Europe. Methods This retrospective single centre, observational cohort study was conducted at the Radboudumc, a tertiary referral centre in the Netherlands. Consecutive patients treated for IE were included from September 2017 to September 2018 before implementation of a dedicated ET and from May 2019 to May 2020 afterwards. Results In total, 90 IE patients (45 patients before and 45 patients after the implementation of the ET) were included. No significant differences were found in diagnostic workup, surgical treatment (surgery performed 69% vs. 71%, p = 0.82), time to surgery because of an urgent indication (median 4 vs. 6 days, p = 0.82), in-hospital complications (53% vs. 67%, p = 0.20), and 6-month mortality (11% vs. 13%, p = 0.75) between IE patients treated before and after the implementation of the ET. Conclusion Formalization of the recommended multidisciplinary endocarditis team might not significantly improve the complication rate nor the short term outcome. Supplementary Information The online version contains supplementary material available at 10.1186/s12872-022-02558-0.
Collapse
Affiliation(s)
- F M A van den Heuvel
- Department of Cardiology, Radboud University Medical Center, Geert Grooteplein Zuid 10, 6500 HB, Nijmegen, the Netherlands.
| | - M Bos
- Department of Cardiology, Radboud University Medical Center, Geert Grooteplein Zuid 10, 6500 HB, Nijmegen, the Netherlands
| | - G S C Geuzebroek
- Department of Cardiothoracic Surgery, Radboud University Medical Center, Nijmegen, The Netherlands
| | - E H J G Aarntzen
- Department of Medical Imaging, Radboud University Medical Center, Nijmegen, The Netherlands
| | - I Maat
- Department of Medical Microbiology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - H J Dieker
- Department of Cardiology, Radboud University Medical Center, Geert Grooteplein Zuid 10, 6500 HB, Nijmegen, the Netherlands
| | - M Verkroost
- Department of Cardiothoracic Surgery, Radboud University Medical Center, Nijmegen, The Netherlands
| | - L Rodwell
- Department of Health Evidence, Section Biostatistics, Radboud University Medical Center, Nijmegen, The Netherlands
| | - J Ten Oever
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, The Netherlands
| | - R van Crevel
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, The Netherlands
| | - J Habets
- Department of Medical Imaging, Radboud University Medical Center, Nijmegen, The Netherlands
| | - I J E Kouijzer
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, The Netherlands
| | - R Nijveldt
- Department of Cardiology, Radboud University Medical Center, Geert Grooteplein Zuid 10, 6500 HB, Nijmegen, the Netherlands
| |
Collapse
|
4
|
Linschoten M, Uijl A, Schut A, Jakob CEM, Romão LR, Bell RM, McFarlane E, Stecher M, Zondag AGM, van Iperen EPA, Hermans-van Ast W, Lea NC, Schaap J, Jewbali LS, Smits PC, Patel RS, Aujayeb A, van der Harst P, Siebelink HJ, van Smeden M, Williams S, Pilgram L, van Gilst WH, Tieleman RG, Williams B, Asselbergs FW, Al-Ali AK, Al-Muhanna FA, Al-Rubaish AM, Al-Windy NYY, Alkhalil M, Almubarak YA, Alnafie AN, Alshahrani M, Alshehri AM, Anning C, Anthonio RL, Badings EA, Ball C, van Beek EA, ten Berg JM, von Bergwelt-Baildon M, Bianco M, Blagova OV, Bleijendaal H, Bor WL, Borgmann S, van Boxem AJM, van den Brink FS, Bucciarelli-Ducci C, van Bussel BCT, Byrom-Goulthorp R, Captur G, Caputo M, Charlotte N, vom Dahl J, Dark P, De Sutter J, Degenhardt C, Delsing CE, Dolff S, Dorman HGR, Drost JT, Eberwein L, Emans ME, Er AG, Ferreira JB, Forner MJ, Friedrichs A, Gabriel L, Groenemeijer BE, Groenendijk AL, Grüner B, Guggemos W, Haerkens-Arends HE, Hanses F, Hedayat B, Heigener D, van der Heijden DJ, Hellou E, Hellwig K, Henkens MTHM, Hermanides RS, Hermans WRM, van Hessen MWJ, Heymans SRB, Hilt AD, van der Horst ICC, Hower M, van Ierssel SH, Isberner N, Jensen B, Kearney MT, van Kesteren HAM, Kielstein JT, Kietselaer BLJH, Kochanek M, Kolk MZH, Koning AMH, Kopylov PY, Kuijper AFM, Kwakkel-van Erp JM, Lanznaster J, van der Linden MMJM, van der Lingen ACJ, Linssen GCM, Lomas D, Maarse M, Macías Ruiz R, Magdelijns FJH, Magro M, Markart P, Martens FMAC, Mazzilli SG, McCann GP, van der Meer P, Meijs MFL, Merle U, Messiaen P, Milovanovic M, Monraats PS, Montagna L, Moriarty A, Moss AJ, Mosterd A, Nadalin S, Nattermann J, Neufang M, Nierop PR, Offerhaus JA, van Ofwegen-Hanekamp CEE, Parker E, Persoon AM, Piepel C, Pinto YM, Poorhosseini H, Prasad S, Raafs AG, Raichle C, Rauschning D, Redón J, Reidinga AC, Ribeiro MIA, Riedel C, Rieg S, Ripley DP, Römmele C, Rothfuss K, Rüddel J, Rüthrich MM, Salah R, Saneei E, Saxena M, Schellings DAAM, Scholte NTB, Schubert J, Seelig J, Shafiee A, Shore AC, Spinner C, Stieglitz S, Strauss R, Sturkenboom NH, Tessitore E, Thomson RJ, Timmermans P, Tio RA, Tjong FVY, Tometten L, Trauth J, den Uil CA, Van Craenenbroeck EM, van Veen HPAA, Vehreschild MJGT, Veldhuis LI, Veneman T, Verschure DO, Voigt I, de Vries JK, van de Wal RMA, Walter L, van de Watering DJ, Westendorp ICD, Westendorp PHM, Westhoff T, Weytjens C, Wierda E, Wille K, de With K, Worm M, Woudstra P, Wu KW, Zaal R, Zaman AG, van der Zee PM, Zijlstra LE, Alling TE, Ahmed R, van Aken K, Bayraktar-Verver ECE, Bermúdez Jiménes FJ, Biolé CA, den Boer-Penning P, Bontje M, Bos M, Bosch L, Broekman M, Broeyer FJF, de Bruijn EAW, Bruinsma S, Cardoso NM, Cosyns B, van Dalen DH, Dekimpe E, Domange J, van Doorn JL, van Doorn P, Dormal F, Drost IMJ, Dunnink A, van Eck JWM, Elshinawy K, Gevers RMM, Gognieva DG, van der Graaf M, Grangeon S, Guclu A, Habib A, Haenen NA, Hamilton K, Handgraaf S, Heidbuchel H, Hendriks-van Woerden M, Hessels-Linnemeijer BM, Hosseini K, Huisman J, Jacobs TC, Jansen SE, Janssen A, Jourdan K, ten Kate GL, van Kempen MJ, Kievit CM, Kleikers P, Knufman N, van der Kooi SE, Koole BAS, Koole MAC, Kui KK, Kuipers-Elferink L, Lemoine I, Lensink E, van Marrewijk V, van Meerbeeck JP, Meijer EJ, Melein AJ, Mesitskaya DF, van Nes CPM, Paris FMA, Perrelli MG, Pieterse-Rots A, Pisters R, Pölkerman BC, van Poppel A, Reinders S, Reitsma MJ, Ruiter AH, Selder JL, van der Sluis A, Sousa AIC, Tajdini M, Tercedor Sánchez L, Van De Heyning CM, Vial H, Vlieghe E, Vonkeman HE, Vreugdenhil P, de Vries TAC, Willems AM, Wils AM, Zoet-Nugteren SK. Clinical presentation, disease course, and outcome of COVID-19 in hospitalized patients with and without pre-existing cardiac disease: a cohort study across 18 countries. Eur Heart J 2022; 43:1104-1120. [PMID: 34734634 DOI: 10.1093/eurheartj/ehab656] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 06/22/2021] [Accepted: 09/01/2021] [Indexed: 12/25/2022] Open
Abstract
AIMS Patients with cardiac disease are considered high risk for poor outcomes following hospitalization with COVID-19. The primary aim of this study was to evaluate heterogeneity in associations between various heart disease subtypes and in-hospital mortality. METHODS AND RESULTS We used data from the CAPACITY-COVID registry and LEOSS study. Multivariable Poisson regression models were fitted to assess the association between different types of pre-existing heart disease and in-hospital mortality. A total of 16 511 patients with COVID-19 were included (21.1% aged 66-75 years; 40.2% female) and 31.5% had a history of heart disease. Patients with heart disease were older, predominantly male, and often had other comorbid conditions when compared with those without. Mortality was higher in patients with cardiac disease (29.7%; n = 1545 vs. 15.9%; n = 1797). However, following multivariable adjustment, this difference was not significant [adjusted risk ratio (aRR) 1.08, 95% confidence interval (CI) 1.02-1.15; P = 0.12 (corrected for multiple testing)]. Associations with in-hospital mortality by heart disease subtypes differed considerably, with the strongest association for heart failure (aRR 1.19, 95% CI 1.10-1.30; P < 0.018) particularly for severe (New York Heart Association class III/IV) heart failure (aRR 1.41, 95% CI 1.20-1.64; P < 0.018). None of the other heart disease subtypes, including ischaemic heart disease, remained significant after multivariable adjustment. Serious cardiac complications were diagnosed in <1% of patients. CONCLUSION Considerable heterogeneity exists in the strength of association between heart disease subtypes and in-hospital mortality. Of all patients with heart disease, those with heart failure are at greatest risk of death when hospitalized with COVID-19. Serious cardiac complications are rare during hospitalization.
Collapse
|
5
|
van der Meeren L, Krop J, Dijkstra K, Bloemenkamp K, Cornish E, Nikkels P, van der Hoorn M, Bos M. One-sided chronic intervillositis of unknown etiology in dizygotic twins: a description of 3 cases. Placenta 2021. [DOI: 10.1016/j.placenta.2021.07.214] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
6
|
Va. Bentem K, Bos M, Va. de. Keur C, Kapsenberg H, Lashley L, Eikmans M, Va. de. Hoorn ML. P–418 Different immunoregulatory components at the decidua basalis of oocyte donation pregnancies. Hum Reprod 2021. [DOI: 10.1093/humrep/deab130.417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Study question
Is the number of regulatory T-cells (Tregs) and immunoregulatory cytokines in the decidua basalis of oocyte donation (OD) pregnancies different compared to naturally conceived pregnancies?
Summary answer
This study suggests that the immunoregulation at the fetal-maternal interface in OD pregnancies with a higher amount of fetal-maternal HLA mismatches appears to be altered.
What is known already
Tregs and related immunoregulatory cytokines, such as interleukins, transforming growth factor-β, and galectin–1, play a key role in maintaining tolerance at the decidua basalis in human pregnancy. Previous studies observed decreased numbers of decidual Tregs in miscarriage and preeclamptic pregnancies. These complications occur in higher frequencies in OD pregnancies, which are characterized by more fetal-maternal human leukocyte antigen (HLA) mismatches compared with naturally conceived (NC) and non-donor in vitro fertilization (IVF) pregnancies, since the fetus obtains paternal and donor-derived HLA genes. Consequently, the maternal immune system has to cope with greater immunogenetic dissimilarity. Involved immunoregulatory mechanisms however remain poorly understood. Study design, size, duration: This case-control study included 27 OD, 11 IVF, and 16 NC placentas of uncomplicated pregnancies, which were collected after delivery at 37–42 weeks of gestation between 2005 and 2013. Clinical data, maternal peripheral blood and umbilical cord blood were collected.
Participants/materials, setting, methods
Decidua basalis was dissected from the placentas, and processed to formalin-fixed, paraffin-embedded slices (4 µm). Immunohistochemical staining for FOXP3, interleukin 10, interleukin 6, galectin–1, transforming growth factor-β, and Flt–1 was performed. Semi-quantitative (FOXP3+ Tregs) and computerized analysis (cytokines), using Image-J software, were executed. Maternal peripheral blood and fetal umbilical cord blood were typed for HLA class I and II, using the Sequence Specific Oligonucleotides PCR technique, to calculate the number of fetal-maternal HLA mismatches.
Main results and the role of chance
All the deciduae basalis of OD, IVF and NC pregnancies showed FOXP3+ Tregs. No significant differences were found when comparing the three groups for the mean number of FOXP3+ Tregs. However, when the amount of fetal-maternal HLA mismatches was related to the percentage of FOXP3+ Tregs, the Tregs were significantly higher in pregnancies with 4–6 HLA class I mismatches (n = 16), than in those with 0–3 HLA class I mismatches (n = 38; p = 0.029). Furthermore, OD pregnancies express less interleukin 10, interleukin 6, galectin–1 and Flt–1 in the decidua basalis compared to NC pregnancies. Moreover, the amount of interleukin 10 was significantly lower with 3–4 fetal-maternal HLA class II mismatches (p = 0.032).
Limitations, reasons for caution
This study is limited by a small sample size. Moreover, only term placentas were collected. It would be worthwhile investigating immunological alterations in the decidua throughout the whole gestation, since maternal adaptation of the fetal allograft could be more prominent early in pregnancy.
Wider implications of the findings: Unravelling the mechanisms of immunomodulation during OD pregnancy, reflected by a high level of fetal-maternal dissimilarity, could help to reach the ultimate goal in transplantation; the induction of donor-specific tolerance. In addition, it might help to understand the development of complications in OD pregnancy.
Trial registration number
Not applicable
Collapse
Affiliation(s)
- K Va. Bentem
- Leiden University Medical Center, Obstetrics and Gynaecology, Leiden, The Netherlands
| | - M Bos
- Leiden University Medical Center, Obstetrics and Gynaecology- and Pathology, Leiden, The Netherlands
| | - C Va. de. Keur
- Leiden University Medical Center, Immunology, Leiden, The Netherlands
| | - H Kapsenberg
- Leiden University Medical Center, Immunology, Leiden, The Netherlands
| | - L Lashley
- Leiden University Medical Center, Obstetrics and Gynaecology, Leiden, The Netherlands
| | - M Eikmans
- Leiden University Medical Center, Immunology, Leiden, The Netherlands
| | - M L Va. de. Hoorn
- Leiden University Medical Center, Obstetrics and Gynaecology, Leiden, The Netherlands
| |
Collapse
|
7
|
Maliko N, Bijker N, Bos M, Vrancken-Peeters M. Nationwide population-based study: Patterns of care in young breast cancer patients in the Netherlands. Eur J Cancer 2020. [DOI: 10.1016/s0959-8049(20)30627-4] [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: 11/15/2022]
|
8
|
|
9
|
van 't Hof LJ, Dijkstra KL, van der Keur C, Eikmans M, Baelde HJ, Bos M, van der Hoorn MLP. Decreased expression of ligands of placental immune checkpoint inhibitors in uncomplicated and preeclamptic oocyte donation pregnancies. J Reprod Immunol 2020; 142:103194. [PMID: 32979711 DOI: 10.1016/j.jri.2020.103194] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Revised: 08/12/2020] [Accepted: 08/26/2020] [Indexed: 12/31/2022]
Abstract
Oocyte donation (OD) pregnancies are characterized by a complete immunogenetic dissimilarity between mother and fetus, which requires enhanced immunoregulation compared to naturally conceived (NC) pregnancies. The trophoblast expresses co-inhibitory ligands crucial for regulation of the maternal T cell response. Therefore, we studied the role of placental immune checkpoint inhibitors for the establishment of fetal tolerance and their relation to the development of preeclampsia in OD compared to NC pregnancies. Placental tissue from uncomplicated OD (n = 21) and NC (n = 21) pregnancies, and OD (n = 9) and NC (n = 15) pregnancies complicated with preeclampsia were studied. Protein expression of co-inhibitory ligands PD-L1 and CD200 was double blind semi-quantitatively determined by immunohistochemistry. Messenger RNA expression of PD-L1, CD200 and indoleamine 2,3-dioxygenase (IDO) was determined using qPCR. Decreased PD-L1 and CD200 protein expression and increased IDO mRNA expression was observed in uncomplicated OD versus NC pregnancies (all p < 0.05). CD200 protein expression was positively correlated with PD-L1 expression in all groups, with the number of HLA total mismatches and with HLA class I mismatches in uncomplicated OD cases (all p < 0.05). Preeclamptic cases showed lower PD-L1 protein and CD200 protein and mRNA expression in OD compared to NC pregnancies (all p < 0.05). This study shows that signaling by co-inhibitory PD-L1 and CD200 and by immunosuppressive IDO is altered in the placenta of OD pregnancies, suggesting a contribution to the higher risk for preeclampsia. These insights provide future prospects in unraveling the immune paradox of oocyte pregnancy, which are applicable for better risk management and treatment of uncomplicated and preeclamptic pregnancies.
Collapse
Affiliation(s)
- L J van 't Hof
- Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands; Department of Gynaecology and Obstetrics, Leiden University Medical Center, Leiden, The Netherlands
| | - K L Dijkstra
- Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands
| | - C van der Keur
- Department of Immunology, Leiden University Medical Center, Leiden, The Netherlands
| | - M Eikmans
- Department of Immunology, Leiden University Medical Center, Leiden, The Netherlands
| | - H J Baelde
- Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands
| | - M Bos
- Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands; Department of Gynaecology and Obstetrics, Leiden University Medical Center, Leiden, The Netherlands
| | - M L P van der Hoorn
- Department of Gynaecology and Obstetrics, Leiden University Medical Center, Leiden, The Netherlands.
| |
Collapse
|
10
|
Bos M, Harris-Mostert ETMS, van der Meeren LE, Baelde JJ, Williams DJ, Nikkels PGJ, Bloemenkamp KWM, van der Hoorn MLP. Clinical outcomes in chronic intervillositis of unknown etiology. Placenta 2020; 91:19-23. [PMID: 32174302 DOI: 10.1016/j.placenta.2020.01.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [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: 09/27/2019] [Revised: 12/29/2019] [Accepted: 01/03/2020] [Indexed: 01/14/2023]
Abstract
INTRODUCTION Chronic intervillositis of unknown etiology (CIUE) is a histopathological lesion of the placenta that is frequently accompanied by unfavourable pregnancy outcomes, e.g. miscarriage, fetal growth restriction (FGR) and intrauterine fetal death. Earlier described case series and cohorts have been based on diverse diagnostic criteria of CIUE. To improve our understanding of clinical outcomes associated with CIUE, we report the obstetric and perinatal outcomes in a cohort based on the recently described diagnostic criteria. METHODS CIUE is defined as an infiltrate occupying 5% or more of the intervillous space with approximately 80% of mononuclear cells positive for CD68 in the absence of an infection. Thirty-eight cases were included. Also previous and subsequent pregnancies were described. RESULTS Pregnancies accompanied by CIUE frequently resulted in FGR (51.6%) and pre-term birth (55.3%). Twenty-nine out of 38 pregnancies (76.3%) with CIUE resulted in a living baby. Women with CIUE frequently have had a miscarriage (16/38; 42%). Four-teen subsequent pregnancies in 8 women resulted in 2 miscarriages, 2 terminations of pregnancy for FGR, 1 early neonatal death and 9 living babies (9/14; 64.3%). Histopathologically confirmed CIUE recurred in 5 out of 10 subsequent pregnancies. Two pregnancies with recurrent CIUE were terminated, one pregnancy ended in a late miscarriage and another resulted in term birth complicated by FGR. Recurrent CIUE can also be accompanied by an uncomplicated pregnancy (1/5; 20%). CONCLUSION This study provides additional insight into the clinical phenotype of CIUE and emphasises the need for further research to understand the pathophysiology behind different pregnancy outcomes in CIUE.
Collapse
Affiliation(s)
- M Bos
- Department of Pathology, Leiden University Medical Center, the Netherlands; Department of Obstetrics and Gynaecology, Leiden University Medical Center, the Netherlands.
| | | | - L E van der Meeren
- Department of Pathology, University Medical Center Utrecht, the Netherlands
| | - J J Baelde
- Department of Pathology, Leiden University Medical Center, the Netherlands
| | - D J Williams
- Institute for Women's Health, University College London Hospitals, United Kingdom
| | - P G J Nikkels
- Department of Pathology, University Medical Center Utrecht, the Netherlands
| | - K W M Bloemenkamp
- Department of Obstetrics, Birth Center Wilhelmina's Children Hospital, Division Woman and Baby, University Medical Center Utrecht, the Netherlands
| | - M L P van der Hoorn
- Department of Obstetrics and Gynaecology, Leiden University Medical Center, the Netherlands
| |
Collapse
|
11
|
Bos M, Buttard F, Vallée A, Riguet E. Organocatalytic Gram-Scale Synthesis and Alkylation of Heteroaryl and Electron-Rich Aryl α-Substituted γ-Lactones. SYNTHESIS-STUTTGART 2019. [DOI: 10.1055/s-0037-1611820] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The synthesis of γ-lactones α-substituted with heterocycles and electron-rich aromatic rings is described. The method, based on a sequence involving an organocatalytic addition of boronic acid to the 5-hydroxyfuran-2(5H)-one, followed by reduction and lactonization, gives access to broad range of γ-lactones on a gram scale. Among these, γ-lactones bearing a benzofuran, a benzothiophene, and an indole ring were alkylated in mild catalytic conditions to construct α-quaternary stereocenters. Interesting mild oxidation reaction, using molecular oxygen, was also highlighted during this study.
Collapse
Affiliation(s)
| | | | | | - Emmanuel Riguet
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, UFR des Sciences Exactes et Naturelles
| |
Collapse
|
12
|
Sieuwerts AM, Vitale SR, Bos M, Sleijfer S, Martens JW. Abstract P5-11-02: Recurrent ESR1 fusions in primary tumors; a promising predictive factor for outcome to first-line endocrine therapy? Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p5-11-02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Introduction:
While fusion genes have been identified and are being utilized as prognostic and predictive markers in various types of cancer, their relevance still needs to be established and verified for breast cancer. Recently, recurrent estrogen receptor alpha (ESR1) fusion genes have been identified as putative endocrine resistance markers, but their predictive value for response to endocrine therapy has not yet been independently validated. Here we studied the presence of fusions of ESR1 exon 2 with exons 1 to 11 of CCDC170, resulting in constitutively activated CCDC170, of ESR1 exon 4 with AKAP12, a putative tumor-suppressor gene, and ESR1 exon 1 with C6orf211/ARMT1, a methyltransferase and their association with outcome in a large cohort of ESR1-positive metastatic breast cancer patients.
Methods:
Fusion gene mRNA levels were measured in 307 ESR1-positive primary tumors by quantitative reverse transcriptase PCR (RT-qPCR). If the RT-qPCR generated a positive Cq value, the expected fusion gene product sizes were validated by MultiNA. All patients in this study were hormone-naïve and all experienced a recurrence and subsequently received 1st line endocrine therapy. The association of the presence of ESR1 fusion genes in the primary tumor with disease-free interval (DFI) before, and progression-free survival (PFS) up to 36 months after start with 1st line tamoxifen (n=219) or aromatase inhibitors (n=88), were evaluated.
Results:
74 patients (24.1%) experienced a disease recurrence within one year after removal of the primary tumor (mean DFI; 34.8 months) and 257 patients (83.7%) progressed on 1st-line endocrine therapy within 3 years (mean PFS; 12.5 months).
For the tamoxifen cohort, ESR1-CCDC170 fusion transcripts were found in 84 patients, of which fusions restricted to exon 1, 4, 6, 10 and 11 of CCDC170 were present in 18 patients who all but one progressed within 3 years (mean PFS 9.1 months). Of note, overall, these 18 patients also had a reduced DFI. Similarly for the 7 patients with ESR1-AKAP12 fusions and the one patient with an ESR1- ARMT fusion; all these patients progressed within 3 years. But in contrast to the ESR1-CCDC170 fusion positive patients, these patients had a prolonged DFI {see Table).
Similar observations were made for the smaller AI cohort, though with the - with respect to their predictive value - most relevant ESR1-CCDC170 fusions restricted to exon 4, 5, 6 and 10 of CCDC170 and here we now also observed a decreased DFI for the 7 patients with ESR1-AKAP12 and the 3 patients with ESR1- ARMT1 fusions (see Table).
1st line tamoxifen (n=219)1st line AI (n=88)Fusion% positiveDFI (months) pos/allPFS (months) pos/allFusion% positiveDFI (months) pos/allPFS (months) pos/allE2-CCDC170 Exon 2 to 1/4/6/10/118.2%19.8/27.99.1/12.0E2-CCDC170 Exon 2 to 4/5/6/1012.5%32.4/51.910.5/13.8E2-AKAP123.2%33.1/27.711.9/12.0E2-AKAP128.0%23.6/54.710.3/12.0E2-ARMT10.5%(n=1)(n=1)E2-ARMT13.4%30.3/52.79.3/12.0
Conclusion:
Measuring recurrent ESR1 fusions in primary breast cancer might become a promising tool to identify patients with intrinsic resistance to endocrine therapy or aggressive disease biology. Importantly however, which fusions are relevant appears to depend on the type of endocrine therapy given.
Citation Format: Sieuwerts AM, Vitale SR, Bos M, Sleijfer S, Martens JW. Recurrent ESR1 fusions in primary tumors; a promising predictive factor for outcome to first-line endocrine therapy? [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P5-11-02.
Collapse
Affiliation(s)
- AM Sieuwerts
- Erasmus MC Cancer Institute, Erasmus University Medical Center, Rotterdam, Netherlands; Cancer Genomics Netherlands, Rotterdam, Netherlands; University of Catania, Catania, Italy
| | - SR Vitale
- Erasmus MC Cancer Institute, Erasmus University Medical Center, Rotterdam, Netherlands; Cancer Genomics Netherlands, Rotterdam, Netherlands; University of Catania, Catania, Italy
| | - M Bos
- Erasmus MC Cancer Institute, Erasmus University Medical Center, Rotterdam, Netherlands; Cancer Genomics Netherlands, Rotterdam, Netherlands; University of Catania, Catania, Italy
| | - S Sleijfer
- Erasmus MC Cancer Institute, Erasmus University Medical Center, Rotterdam, Netherlands; Cancer Genomics Netherlands, Rotterdam, Netherlands; University of Catania, Catania, Italy
| | - JW Martens
- Erasmus MC Cancer Institute, Erasmus University Medical Center, Rotterdam, Netherlands; Cancer Genomics Netherlands, Rotterdam, Netherlands; University of Catania, Catania, Italy
| |
Collapse
|
13
|
Bos M, Gordijn S, Schoots M, Baelde J, Feelisch M, Eikmans M, van Goor H, van der Hoorn M. Changes in the reactive species interactome in oocyte donation pregnancies and pre-eclampsia. J Reprod Immunol 2018. [DOI: 10.1016/j.jri.2018.05.032] [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: 10/28/2022]
|
14
|
Bos M, Noordam R, Van den Berg R, De Mutsert R, Rosendaal F, Blauw G, Rensen P, Biermasz N, Van Heemst D. Associations between measures of sleep with serum and hepatic lipid profile: The Netherlands epidemiology of obesity study. Atherosclerosis 2018. [DOI: 10.1016/j.atherosclerosis.2018.06.214] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
15
|
Bos M, Nikkels PGJ, Cohen D, Schoones JW, Bloemenkamp KWM, Bruijn JA, Baelde HJ, van der Hoorn MLP, Turner RJ. Towards standardized criteria for diagnosing chronic intervillositis of unknown etiology: A systematic review. Placenta 2017; 61:80-88. [PMID: 29277275 DOI: 10.1016/j.placenta.2017.11.012] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [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] [Received: 09/13/2017] [Revised: 11/05/2017] [Accepted: 11/20/2017] [Indexed: 12/25/2022]
Abstract
Chronic intervillositis of unknown etiology (CIUE) is a poorly understood, relatively rare condition characterized histologically by the intervillous infiltration of mononuclear cells in the placenta. Clinically, CIUE is associated with poor pregnancy outcome (e.g., impaired fetal growth, preterm birth, fetal death) and high risk of recurrence in subsequent pregnancies. Because CIUE is not defined consistently, it is essential to clearly define this condition. We therefore review the published definitions of CIUE. In addition, we provide an overview of the reviewed histopathological and maternal characteristics, obstetric features, and pregnancy outcomes. Medical publication databases were searched for articles published through February 2017. Eighteen studies were included in our systematic review. The sole inclusion criterion used in all studies was the presence of intervillous infiltrates. Overall, CIUE was characterized by adverse pregnancy outcome. Miscarriage occurred in 24% of cases, with approximately half of these miscarriages defined as late. Impaired growth was commonly observed, 32.4% of pregnancies reached term, and the live birth rate was 54.9%. The high recurrence rate (25.1%) of the intervillous infiltrates in subsequent pregnancies underscores the clinical relevance of CIUE, the need for increased awareness among pathologists and clinicians, and the need for further research. Criteria for the diagnosis of CIUE are proposed and a Delphi study could be used to resolve any controversy regarding these criteria. Future studies should be designed to characterize the full clinical spectrum of CIUE.
Collapse
Affiliation(s)
- M Bos
- Department of Pathology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands.
| | - P G J Nikkels
- Department of Pathology, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
| | - D Cohen
- Department of Pathology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| | - J W Schoones
- Walaeus Medical Library, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| | - K W M Bloemenkamp
- Department of Obstetrics, University Medical Center Utrecht, Wilhelmina Children's Hospital, Birth Centre, Lundlaan 6, 3584 EA Utrecht, The Netherlands
| | - J A Bruijn
- Department of Pathology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| | - H J Baelde
- Department of Pathology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| | - M L P van der Hoorn
- Department of Obstetrics, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| | - R J Turner
- Department of Pathology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| |
Collapse
|
16
|
Bos M, Huang WS, Poisson T, Pannecoucke X, Charette AB, Jubault P. Catalytic Enantioselective Synthesis of Highly Functionalized Difluoromethylated Cyclopropanes. Angew Chem Int Ed Engl 2017; 56:13319-13323. [DOI: 10.1002/anie.201707375] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Revised: 08/27/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Maxence Bos
- Normandie Univ; INSA Rouen; UNIROUEN; CNRS, COBRA (UMR 6014); 76000 Rouen France
- Centre in Green Chemistry and Catalysis; Faculty of Arts and Sciences Department of Chemistry; Université de Montréal; PO Box 6128, Station Downtown Montréal Québec H3C3J7 Canada
| | - Wei-Sheng Huang
- Normandie Univ; INSA Rouen; UNIROUEN; CNRS, COBRA (UMR 6014); 76000 Rouen France
| | - Thomas Poisson
- Normandie Univ; INSA Rouen; UNIROUEN; CNRS, COBRA (UMR 6014); 76000 Rouen France
| | - Xavier Pannecoucke
- Normandie Univ; INSA Rouen; UNIROUEN; CNRS, COBRA (UMR 6014); 76000 Rouen France
| | - André B. Charette
- Centre in Green Chemistry and Catalysis; Faculty of Arts and Sciences Department of Chemistry; Université de Montréal; PO Box 6128, Station Downtown Montréal Québec H3C3J7 Canada
| | - Philippe Jubault
- Normandie Univ; INSA Rouen; UNIROUEN; CNRS, COBRA (UMR 6014); 76000 Rouen France
| |
Collapse
|
17
|
Bos M, Huang WS, Poisson T, Pannecoucke X, Charette AB, Jubault P. Catalytic Enantioselective Synthesis of Highly Functionalized Difluoromethylated Cyclopropanes. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201707375] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Maxence Bos
- Normandie Univ; INSA Rouen; UNIROUEN; CNRS, COBRA (UMR 6014); 76000 Rouen France
- Centre in Green Chemistry and Catalysis; Faculty of Arts and Sciences Department of Chemistry; Université de Montréal; PO Box 6128, Station Downtown Montréal Québec H3C3J7 Canada
| | - Wei-Sheng Huang
- Normandie Univ; INSA Rouen; UNIROUEN; CNRS, COBRA (UMR 6014); 76000 Rouen France
| | - Thomas Poisson
- Normandie Univ; INSA Rouen; UNIROUEN; CNRS, COBRA (UMR 6014); 76000 Rouen France
| | - Xavier Pannecoucke
- Normandie Univ; INSA Rouen; UNIROUEN; CNRS, COBRA (UMR 6014); 76000 Rouen France
| | - André B. Charette
- Centre in Green Chemistry and Catalysis; Faculty of Arts and Sciences Department of Chemistry; Université de Montréal; PO Box 6128, Station Downtown Montréal Québec H3C3J7 Canada
| | - Philippe Jubault
- Normandie Univ; INSA Rouen; UNIROUEN; CNRS, COBRA (UMR 6014); 76000 Rouen France
| |
Collapse
|
18
|
Richard F, Ahmed W, Denholm N, Dawson A, Varol N, Essén B, Johnsdotter S, Bukuluki P, Ahmed W, Naeema AGH, eltayeb D, Shell-Duncan B, Njue C, Muteshi J, Lamy C, Neyrinck P, Richard F, Verduyckt P, Alexander S, Kimani S, Esho T, Kimani V, Kigondu C, Karanja J, Guyo J, Touré M, Guindo YG, Samaké D, Camara L, Traoré Y, Traoré AA, Samaké A, Johnson-Agbakwu CE, Jordal M, Jirovsky E, Wu S, Fitzgerald K, Mishori R, Reingold R, Ismail EA, Say L, Uebelhart M, Boulvain M, Dallenbäch P, Irion O, Petignat P, Abdulcadir J, Farina P, Leye E, Ortensi L, Pecorella C, Novak L, Abdulcadir J, Cuzin B, Delmas FB, Papingui A, Bader D, Wahlberg A, Johnsdotter S, Selling KE, Källestål C, Essén B, Ibraheim AHHI, Elawad NAM, Ahmed W, Gasseer A, Naeema H, Maison E, Hussein H, Albagir AM, Bukuluki P, Albirair MT, Salih SAS, Ahmed W, Gasseer A, Naeema H, Maison E, Hussein H, Albagir AM, Albirair MT, Bukuluki P, Dawson A, Varol N, Esho T, Kimani S, Kimani V, Muniu S, Kigondu C, Nyamongo I, Guyo J, Ndavi P, Reingold R, Mishori R, Fitzgerald K, Wu S, Hedley H, Kuenzi R, Malavé-Seda L, Clare C, Greenfield J, Augustus P, Ukatu N, Manu E, Altonen B, Caillet M, Richard F, Foldès P, Cuzin B, Delmas FB, Papingui A, Wylomanski S, Vital M, De Visme S, Dugast S, Hanf M, Winer N, Johnsdotter S, Essén B, Seifeldin A, Mishori R, Fitzgerald K, Reingold R, Wu S, Villani M, Johnsdotter S, Essén B, Seinfeld R, Earp B, Cappon S, L’Ecluse C, Clays E, Tency I, Leye E, Johansen RE, Ouédraogo CM, Madzou S, Simporé A, Combaud V, Ouattara A, Millogo F, Ouédraogo A, Kiemtore S, Zamane H, Sawadogo YA, Kaien P, Dramé B, Thieba B, Lankoandé J, Descamps P, Catania L, Mastrullo R, Caselli A, Cecere R, Abdulcadir O, Abdulcadir J, Vogt S, Efferson C, O’Neill S, Dubour D, Florquin S, Bos M, Zewolde S, Richard F, Varol N, Dawson A, Turkmani S, Hall JJ, Nanayakkara S, Jenkins G, Homer CS, McGeechan K, Vital M, de Visme S, Hanf M, Philippe HJ, Winer N, Wylomanski S, Johnson-Agbakwu C, Warren N, Macfarlane A, Dorkenoo W, Lien IL, Schultz JH. Female Genital Mutilation/Cutting: sharing data and experiences to accelerate eradication and improve care: part 2. Reprod Health 2017. [PMCID: PMC5607483 DOI: 10.1186/s12978-017-0362-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
19
|
Claessens A, Bos M, de Groot S, van Leeuwen-Stok E, Lopez-Yurda M, Honkoop A, de Graaf H, van Druten E, van Warmerdam L, van der Sangen M, Tjan-Heijnen V, Erdkamp F. Efficacy of two times four versus continuous eight cycles of paclitaxel/bevacizumab as first-line chemotherapy in metastatic breast cancer: The Stop&Go study of the Dutch Breast Cancer Research Group (BOOG). Ann Oncol 2017. [DOI: 10.1093/annonc/mdx365.009] [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: 11/12/2022] Open
|
20
|
Bos M, Burnet B, Farrow R, Woods RA. MUTUAL FACILITATION BETWEEN LARVAE OF THE SIBLING SPECIES DROSOPHILA MELANOGASTER
AND D. SIMULANS. Evolution 2017; 31:824-828. [DOI: 10.1111/j.1558-5646.1977.tb01074.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/1976] [Revised: 02/11/1977] [Indexed: 11/28/2022]
Affiliation(s)
- M. Bos
- Department of Genetics; University of Sheffield; England
| | - B. Burnet
- Department of Genetics; University of Sheffield; England
| | - R. Farrow
- Department of Genetics; University of Sheffield; England
| | - R. A. Woods
- Department of Genetics; University of Sheffield; England
| |
Collapse
|
21
|
Bos M, Poisson T, Pannecoucke X, Charette AB, Jubault P. Frontispiece: Recent Progress Toward the Synthesis of Trifluoromethyl- and Difluoromethyl-Substituted Cyclopropanes. Chemistry 2017. [DOI: 10.1002/chem.201782161] [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: 11/09/2022]
Affiliation(s)
- Maxence Bos
- Normandie Univ; INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014); 76000 Rouen France
| | - Thomas Poisson
- Normandie Univ; INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014); 76000 Rouen France
| | - Xavier Pannecoucke
- Normandie Univ; INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014); 76000 Rouen France
| | - André B. Charette
- Centre in Green Chemistry and Catalysis, Faculty of Arts and Sciences; Department of Chemistry; Université de Montréal, PO Box 6128, Station Downtown; Montréal Québec H3C 3J7 Canada
| | - Philippe Jubault
- Normandie Univ; INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014); 76000 Rouen France
| |
Collapse
|
22
|
Bos M, Poisson T, Pannecoucke X, Charette AB, Jubault P. Recent Progress Toward the Synthesis of Trifluoromethyl- and Difluoromethyl-Substituted Cyclopropanes. Chemistry 2017; 23:4950-4961. [DOI: 10.1002/chem.201604564] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Indexed: 12/15/2022]
Affiliation(s)
- Maxence Bos
- Normandie Univ; INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014); 76000 Rouen France
| | - Thomas Poisson
- Normandie Univ; INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014); 76000 Rouen France
| | - Xavier Pannecoucke
- Normandie Univ; INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014); 76000 Rouen France
| | - André B. Charette
- Centre in Green Chemistry and Catalysis, Faculty of Arts and Sciences; Department of Chemistry; Université de Montréal, PO Box 6128, Station Downtown; Montréal Québec H3C 3J7 Canada
| | - Philippe Jubault
- Normandie Univ; INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014); 76000 Rouen France
| |
Collapse
|
23
|
Bos M, Riguet E. Iridium-catalysed asymmetric allylic alkylation of benzofuran γ-lactones followed by heteroaromatic Cope rearrangement: study of an unusual reaction sequence. Chem Commun (Camb) 2017; 53:4997-5000. [DOI: 10.1039/c7cc01529a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The iridium-catalysed asymmetric allylic alkylation of benzofuran γ-lactones produces 1,5-hexadienes that were found to be excellent substrates for an unusual heteroaromatic Cope rearrangement.
Collapse
Affiliation(s)
- Maxence Bos
- Université de Reims Champagne-Ardenne
- Institut de Chimie Moléculaire de Reims
- CNRS UMR 7312
- UFR des Sciences Exactes et Naturelles
- 51687 Reims Cedex 2
| | - Emmanuel Riguet
- Université de Reims Champagne-Ardenne
- Institut de Chimie Moléculaire de Reims
- CNRS UMR 7312
- UFR des Sciences Exactes et Naturelles
- 51687 Reims Cedex 2
| |
Collapse
|
24
|
Bos M, Ackermans L, Smeets A, Kubben P, van Kranen-Mastenbroek V, Leentjens A, Buhre W, Visser-Vandewalle V, Temel Y. EP 13. Tailored anesthetic techniques in patients with severe Tourette Syndrome undergoing surgery for Deep Brain Stimulation. Clin Neurophysiol 2016. [DOI: 10.1016/j.clinph.2016.05.206] [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]
|
25
|
Bos M, Voss A, Tostmann A, Hopman J. Automatic discontinuation of isolation precautions and electronic alerts of MDRO positive patients: safe or sorry? Antimicrob Resist Infect Control 2015. [PMCID: PMC4474928 DOI: 10.1186/2047-2994-4-s1-p119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
26
|
Bos M, Riguet E. Synthesis of chiral γ-lactones by one-pot sequential enantioselective organocatalytic michael addition of boronic acids and diastereoselective intramolecular passerini reaction. J Org Chem 2014; 79:10881-9. [PMID: 25365780 DOI: 10.1021/jo501908z] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The synthesis of α,γ-substituted chiral γ-lactones was quickly achieved in a one pot sequential process. The procedure involves an enantioselective organocatalysed transfer of boronic acid to 5-hydroxyfuran-2(5H)-one, followed by an intramolecular diastereoselective Passerini-type reaction. The methodology was developed and optimized with N-Boc-indole-2-boronic acid giving access to α-indole-γ-substituted lactones in high yields and good diastereoisomeric and enantiomeric ratios. By applying the process to other boronic acids, the synthesis of structurally diversified α,γ-substituted chiral lactones was also achieved in good yields albeit with lower enantioselectivities.
Collapse
Affiliation(s)
- Maxence Bos
- Université de Reims Champagne-Ardenne , Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, UFR des Sciences Exactes et Naturelles, BP 1039, 51687 Reims Cedex 2, France
| | | |
Collapse
|
27
|
Biscans A, Bos M, Martin AR, Ader N, Sczakiel G, Vasseur JJ, Dupouy C, Debart F. Direct synthesis of partially modified 2'-O-pivaloyloxymethyl RNAs by a base-labile protecting group strategy and their potential for prodrug-based gene-silencing applications. Chembiochem 2014; 15:2674-9. [PMID: 25346406 DOI: 10.1002/cbic.201402382] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Indexed: 01/30/2023]
Abstract
An original and straightforward synthesis of partially modified 2'-O-pivaloyloxymethyl-substituted (PivOM-substituted) oligoribonucleotides has been achieved. The aim of this 2'-enzymolabile modification was to enhance nuclease stability of RNA and transmembrane transport. To make these modified RNAs easily available we developed a base-labile protecting group strategy with standard protections for nucleobases (acyl) and phosphates (cyanoethyl), a Q-linker and two different acetalester protection groups for 2'-OH: propionyloxymethyl (PrOM) and PivOM. Interestingly, orthogonal deprotection conditions based on anhydrous butylamine in THF were found to remove propionyloxymethyl groups selectively, while preserving PivOM groups. Duplex stability, circular dichroism studies and nuclease resistance, as well as the ability to inhibit gene expression of modified 2'-O-PivOM RNA, were evaluated.
Collapse
Affiliation(s)
- Annabelle Biscans
- IBMM, UMR 5247 CNRS-UM1-UM2, Department of Nucleic Acids, Montpellier University, Place E. Bataillon, 34095 Montpellier cedex 05 (France)
| | | | | | | | | | | | | | | |
Collapse
|
28
|
Ambagtsheer J, Pascalev A, de Jong J, Lundin S, Ivanovski N, Codreanu N, Gunnarson M, Yankov J, Frunza M, Byström I, Bos M, Weimar W. Trafficking in human beings for the purpose of organ removal: A comprehensive literature review. Transpl Immunol 2014. [DOI: 10.1016/j.trim.2014.11.201] [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: 10/24/2022]
|
29
|
Nogova L, Mattonet C, Scheffler M, Michels S, Bos M, Heukamp L, Schildhaus H, Fuhr U, Eberhardt W, Reis H, Wiesweg M, Schmid K, Schoch G, Serke M, Ko Y, Schuler M, Büttner R, Wolf J. Try - a Phase Ii Study to Evaluate Safety and Efficacy of Combined Trastuzumab and the Hsp90 Inhibitor Auy922 in Advanced Non-Small-Cell Lung Cancer (Nsclc) with Her2 Overexpression or Amplification or Mutation. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu349.17] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
30
|
Pieters B, Bos M, Ordonez-Marmolejo R, Rasch C. PO-1042: Comparison of cystectomy and organ preservative brachytherapy for bladder cancer in a systematic review. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)31160-9] [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: 10/23/2022]
|
31
|
Grech A, Bos M, Brodie J, Coles R, Dale A, Gilbert R, Hamann M, Marsh H, Neil K, Pressey RL, Rasheed MA, Sheaves M, Smith A. Guiding principles for the improved governance of port and shipping impacts in the Great Barrier Reef. Mar Pollut Bull 2013; 75:8-20. [PMID: 23932477 DOI: 10.1016/j.marpolbul.2013.07.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Revised: 07/04/2013] [Accepted: 07/04/2013] [Indexed: 06/02/2023]
Abstract
The Great Barrier Reef (GBR) region of Queensland, Australia, encompasses a complex and diverse array of tropical marine ecosystems of global significance. The region is also a World Heritage Area and largely within one of the world's best managed marine protected areas. However, a recent World Heritage Committee report drew attention to serious governance problems associated with the management of ports and shipping. We review the impacts of ports and shipping on biodiversity in the GBR, and propose a series of guiding principles to improve the current governance arrangements. Implementing these principles will increase the capacity of decision makers to minimize the impacts of ports and shipping on biodiversity, and will provide certainty and clarity to port operators and developers. A 'business as usual' approach could lead to the GBR's inclusion on the List of World Heritage in Danger in 2014.
Collapse
Affiliation(s)
- A Grech
- Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook University, Townsville, Queensland 4811, Australia.
| | - M Bos
- Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook University, Townsville, Queensland 4811, Australia.
| | - J Brodie
- Centre for Tropical Water and Aquatic Ecosystem Research, James Cook University, Townsville, Queensland 4811, Australia.
| | - R Coles
- Centre for Tropical Water and Aquatic Ecosystem Research, James Cook University, Townsville, Queensland 4811, Australia.
| | - A Dale
- The Cairns Institute, James Cook University, Cairns, Queensland 4870, Australia.
| | - R Gilbert
- Great Barrier Reef Marine Park Authority, Townsville, Queensland 4810, Australia.
| | - M Hamann
- Centre for Tropical Water and Aquatic Ecosystem Research, James Cook University, Townsville, Queensland 4811, Australia; School of Earth and Environmental Sciences, James Cook University, Townsville, Queensland 4811, Australia.
| | - H Marsh
- Centre for Tropical Water and Aquatic Ecosystem Research, James Cook University, Townsville, Queensland 4811, Australia; School of Earth and Environmental Sciences, James Cook University, Townsville, Queensland 4811, Australia.
| | - K Neil
- GHD, Brisbane, Queensland 4000, Australia.
| | - R L Pressey
- Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook University, Townsville, Queensland 4811, Australia.
| | - M A Rasheed
- Centre for Tropical Water and Aquatic Ecosystem Research, James Cook University, Townsville, Queensland 4811, Australia.
| | - M Sheaves
- Centre for Tropical Water and Aquatic Ecosystem Research, James Cook University, Townsville, Queensland 4811, Australia; School of Marine and Tropical Biology, James Cook University, Townsville, Queensland 4811, Australia.
| | - A Smith
- Great Barrier Reef Marine Park Authority, Townsville, Queensland 4810, Australia.
| |
Collapse
|
32
|
Bos M, Gardizi M, Schildhaus HU, Heukamp LC, Geist T, Kaminsky B, Zander T, Nogova L, Scheffler M, Dietlein M, Kobe C, Holstein A, Maintz D, Büttner R, Wolf J. Complete metabolic response in a patient with repeatedly relapsed non-small cell lung cancer harboring ROS1 gene rearrangement after treatment with crizotinib. Lung Cancer 2013; 81:142-3. [PMID: 23558310 DOI: 10.1016/j.lungcan.2013.02.018] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Accepted: 02/19/2013] [Indexed: 11/30/2022]
Abstract
A 55-year-old Caucasian woman with lung adenocarcinoma stage IV presented with repeated relapse after treatment with cytotoxic chemotherapy (carboplatin, gemcitabine, docetaxel, pemetrexed) and targeted agents (erlotinib, cetuximab, sunitinib). Comprehensive molecular diagnostics (EGFR-, ALK-, RAS-, BRAF-, PIK3CA-, HER2- and DDR2-aberrations) were performed and failed initially to detect any driver mutation. While the patient suffered from rapid deterioration of her general condition, in particular from progressive dyspnea due to lung metastases, we implemented screening for RET- and ROS1 translocations into our molecular diagnostic program based on recent reports of these new molecular subgroups in lung adenocarcinoma. On retesting the patient's tumor sample was found to harbor a ROS1-translocation. The patient was subsequently treated with crizotinib and experienced a pronounced clinical improvement corresponding to a complete metabolic response in (18)F-FDG-PET and a good and confirmed partial response in CT (RECIST 1.1). Our case exemplifies the need for rapid implementation of newly discovered rare genetic lung cancer subtypes in routine molecular diagnostics.
Collapse
Affiliation(s)
- M Bos
- Department I of Internal Medicine, Center for Integrated Oncology Köln-Bonn, University Hospital Cologne, Cologne, Germany
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
33
|
Bos M, Kool-Goudzwaard N, Gamel CJ, Koekkoek B, van Meijel B. The treatment of 'difficult' patients in a secure unit of a specialized psychiatric hospital: the patient's perspective. J Psychiatr Ment Health Nurs 2012; 19:528-35. [PMID: 22070631 DOI: 10.1111/j.1365-2850.2011.01827.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [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] [Indexed: 11/28/2022]
Abstract
The aim of this study is to obtain insight, from a patient's perspective, into the results and essential components of treatment in specialist settings for so-called 'difficult' patients in mental health care. In cases where usual hospital treatment is not successful, a temporary transfer to another, specialist hospital may provide a solution. We investigated which aspects of specialist treatment available to 'difficult' patients are perceived as essential by the patients and what are the results of this treatment in their perception. A qualitative research design based on the Grounded Theory method was used. To generate data, 14 semi-structured interviews were held with 12 patients who were admitted to a specialist hospital in the Netherlands. Almost all respondents rated the results of the specialist treatment as positive. The therapeutic climate was perceived as extremely strict, with a strong focus on structure, cooperation and safety. This approach had a stabilizing effect on the patients, even at times when they were not motivated. Most patients developed a motivation for change, marked by a growing and more explicit determination of their future goals. We concluded that a highly structured treatment environment aimed at patient stabilization is helpful to most 'difficult' patients.
Collapse
Affiliation(s)
- M Bos
- Department of Nursing, Utrecht University of Applied Sciences, Utrecht, The Netherlands.
| | | | | | | | | |
Collapse
|
34
|
Bontenbal M, Seynaeve C, Stouthard J, Bos M, Braun H, Erdkamp FL, van Deijk G, Schmitz P, Van der Stelt-Frissen I, Hamberg P, Klijn J. Randomized study comparing efficacy/toxicity of monotherapy trastuzumab followed by monotherapy docetaxel at progression, and combination trastuzumab/docetaxel as first-line chemotherapy in HER2-neu positive, metastatic breast cancer (MBC) (HERTAX study). J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.1014] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
35
|
|
36
|
Klerk CPW, Smorenburg S, Otten HM, Richel D, Van Tienhoven G, Lensing A, Büller H, Prandoni P, Bos M, Prins M. Low-molecular-weight heparin and the survival of patients with advanced malignancy. J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.8018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- C. P. W. Klerk
- Academic Medical Center, Amsterdam, Netherlands; University Hospital of Padua, Padua, Italy; Reinier de Graaf Hospital, Delft, Netherlands; Academic Hospital Maastricht, Maastricht, Netherlands
| | - S. Smorenburg
- Academic Medical Center, Amsterdam, Netherlands; University Hospital of Padua, Padua, Italy; Reinier de Graaf Hospital, Delft, Netherlands; Academic Hospital Maastricht, Maastricht, Netherlands
| | - H.-M. Otten
- Academic Medical Center, Amsterdam, Netherlands; University Hospital of Padua, Padua, Italy; Reinier de Graaf Hospital, Delft, Netherlands; Academic Hospital Maastricht, Maastricht, Netherlands
| | - D. Richel
- Academic Medical Center, Amsterdam, Netherlands; University Hospital of Padua, Padua, Italy; Reinier de Graaf Hospital, Delft, Netherlands; Academic Hospital Maastricht, Maastricht, Netherlands
| | - G. Van Tienhoven
- Academic Medical Center, Amsterdam, Netherlands; University Hospital of Padua, Padua, Italy; Reinier de Graaf Hospital, Delft, Netherlands; Academic Hospital Maastricht, Maastricht, Netherlands
| | - A. Lensing
- Academic Medical Center, Amsterdam, Netherlands; University Hospital of Padua, Padua, Italy; Reinier de Graaf Hospital, Delft, Netherlands; Academic Hospital Maastricht, Maastricht, Netherlands
| | - H. Büller
- Academic Medical Center, Amsterdam, Netherlands; University Hospital of Padua, Padua, Italy; Reinier de Graaf Hospital, Delft, Netherlands; Academic Hospital Maastricht, Maastricht, Netherlands
| | - P. Prandoni
- Academic Medical Center, Amsterdam, Netherlands; University Hospital of Padua, Padua, Italy; Reinier de Graaf Hospital, Delft, Netherlands; Academic Hospital Maastricht, Maastricht, Netherlands
| | - M. Bos
- Academic Medical Center, Amsterdam, Netherlands; University Hospital of Padua, Padua, Italy; Reinier de Graaf Hospital, Delft, Netherlands; Academic Hospital Maastricht, Maastricht, Netherlands
| | - M. Prins
- Academic Medical Center, Amsterdam, Netherlands; University Hospital of Padua, Padua, Italy; Reinier de Graaf Hospital, Delft, Netherlands; Academic Hospital Maastricht, Maastricht, Netherlands
| |
Collapse
|
37
|
Bos M, Braams R, Leenen L. Crit Care 2004; 8:P62. [DOI: 10.1186/cc2529] [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: 11/10/2022] Open
|
38
|
Bos M, de Bosschere H, Deprez P, van Loon G, de Vriese SR, Christophe AB, Ducatelle R. Chemical identification of the (causative) lipids in a case of exogenous lipoid pneumonia in a horse. Equine Vet J 2002; 34:744-7. [PMID: 12455849 DOI: 10.2746/042516402776250351] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- M Bos
- Laboratory of Veterinary Pathology, Bacteriology and Poultry Diseases, Faculty of Veterinary Medicine, University of Ghent, Belgium
| | | | | | | | | | | | | |
Collapse
|
39
|
Seger LHGJ, Wouters MEL, Bos M, van den Berg JWA, Vancso GJ. Surface energy characteristics of toner particles by automated inverse gas chromatography. J Chromatogr A 2002; 969:215-27. [PMID: 12385393 DOI: 10.1016/s0021-9673(02)00374-6] [Citation(s) in RCA: 17] [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: 11/26/2022]
Abstract
Inverse gas chromatography (IGC) was applied to the surface energy study of surfaces of toner particles. The dispersive component of the surface energy was determined for three toner materials by infinite dilution IGC. The values obtained were comparable to the values obtained from contact angle experiments. Previous adhesion experiments by atomic force microscopy suggested that the toner is a hydrophilic material with multiple adsorption energy sites. Both aspects were at least qualitatively confirmed by finite concentration IGC. Several indications for surface heterogeneity were found: (i) the difference between the dispersive component of the surface energy determined by IGC and the unexpectedly low total surface energy as determined by droplet analysis, (ii) the strong tailing behavior of the peaks of the injected polar probes, (iii) the decrease of the net retention volume with increasing n-pentane concentration, and finally (iv) the broad energy site distribution function with a dominant site at 28 kJ/mol, as determined by finite concentration IGC for n-pentane as molecular probe.
Collapse
Affiliation(s)
- L H G J Seger
- Faculty of Chemical Technology and MESA Research Institute, University of Twente, Enschede, The Netherlands
| | | | | | | | | |
Collapse
|
40
|
Bos M. [Waltham Award for evaluation of laparoscopic ovariectomy in the bitch]. Tijdschr Diergeneeskd 2002; 127:401-2. [PMID: 12096468] [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: 02/25/2023]
|
41
|
Bos M, Boukamp B, Vrielink J. Determination of diffusion profiles of silver ions in soda-lime–silica glass by X-ray fluorescence spectrometry. Anal Chim Acta 2002. [DOI: 10.1016/s0003-2670(02)00136-8] [Citation(s) in RCA: 2] [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: 10/27/2022]
|
42
|
Abstract
The Dutch healthcare system is not a single overall plan, but has evolved from a constantly changing mix of institutions, regulations, and responsibilities. The resulting system provides high-quality care with reasonable efficiency and equal distribution over the population. Every Dutch citizen is entitled to health care. Health insurance is provided by a mix of compulsory national insurance and public and private insurance schemes. Hospitals generally have a private legal basis but are heavily regulated. Supraregional planning of high-tech medical services is also regulated. Hospitals function under fixed, prospective budgets with regulation of capital investments. Independent general practitioners serve a gatekeeper role for specialist and hospital services and are paid by capitation or fee for service. Specialists are paid by fee for service. All physicians' fees are controlled by the Ministry of Economic Affairs. Coverage of benefits is an important method of controlling the cost of services. There is increasing concern about health care quality. Health technology assessment (HTA) has become increasingly visible during the last 15 years. A special national fund for HTA, set up in 1988, has led to many formal and informal changes. HTA has evolved from a research activity into policy research for improving health care on the national level. In 1993 the government stated formally that enhancing effectiveness in health care was one of its prime targets and that HTA would be a prime tool for this purpose. The most important current issue is coordination of HTA activities, which is now undertaken by a new platform representing the important actors in health care and HTA.
Collapse
|
43
|
Bos M, Vrielink J, van der Linden W. Non-destructive analysis of small irregularly shaped homogenous samples by X-ray fluorescence spectrometry. Anal Chim Acta 2000. [DOI: 10.1016/s0003-2670(00)00771-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
44
|
Baselga J, Pfister D, Cooper MR, Cohen R, Burtness B, Bos M, D'Andrea G, Seidman A, Norton L, Gunnett K, Falcey J, Anderson V, Waksal H, Mendelsohn J. Phase I studies of anti-epidermal growth factor receptor chimeric antibody C225 alone and in combination with cisplatin. J Clin Oncol 2000; 18:904-14. [PMID: 10673534 DOI: 10.1200/jco.2000.18.4.904] [Citation(s) in RCA: 500] [Impact Index Per Article: 20.8] [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: 11/20/2022] Open
Abstract
PURPOSE The epidermal growth factor (EGF) receptor is frequently overexpressed in epithelial tumors. C225 is a human-to-murine chimeric monoclonal antibody that binds to the receptor and inhibits growth of cancer cells expressing the receptor. We evaluated the pharmacokinetics and toxicity of C225 in patients with advanced tumors overexpressing EGF receptors. PATIENTS AND METHODS We treated 52 patients in three successive phase I clinical trials of C225 as a single dose (n = 13), weekly multiple dose (n = 17), and weekly multiple dose with cisplatin (n = 22). C225 dose levels were 5, 20, 50, and 100 mg/m(2). In the study combining C225 with cisplatin, limited to patients with either head and neck or non-small-cell lung cancer, C225 was further escalated to 200 and 400 mg/m(2). Cisplatin was given at a dose of 60 mg/m(2) once every 4 weeks, and treatment was continued for up to 12 weeks if no disease progression occurred. RESULTS C225 displayed nonlinear pharmacokinetics, with antibody doses in the range of 200 to 400 mg/m(2) being associated with complete saturation of systemic clearance. C225 clearance did not change with repeated administration or with coadministration of cisplatin. Antibodies against C225 were detected in only one patient, and C225-associated toxicity was minimal. Patients experiencing disease stabilization were seen in all studies. In the study combining C225 and cisplatin, nine (69%) of 13 patients treated with antibody doses >/= 50 mg/m(2) completed 12 weeks of therapy, and two partial responses were observed. CONCLUSION C225 has dose-dependent pharmacokinetics, and doses that achieve saturation of systemic clearance are well tolerated. C225 given in combination with cisplatin has biologic activity at pharmacologically relevant doses.
Collapse
MESH Headings
- Adult
- Antibodies, Monoclonal/adverse effects
- Antibodies, Monoclonal/pharmacokinetics
- Antibodies, Monoclonal/therapeutic use
- Antibodies, Monoclonal, Humanized
- Antineoplastic Agents/adverse effects
- Antineoplastic Agents/pharmacokinetics
- Antineoplastic Agents/therapeutic use
- Area Under Curve
- Carcinoma, Non-Small-Cell Lung/drug therapy
- Carcinoma, Non-Small-Cell Lung/therapy
- Carcinoma, Squamous Cell/drug therapy
- Carcinoma, Squamous Cell/therapy
- Cetuximab
- Cisplatin/therapeutic use
- Dose-Response Relationship, Drug
- Drug Administration Schedule
- ErbB Receptors/antagonists & inhibitors
- ErbB Receptors/genetics
- Female
- Gene Expression Regulation, Neoplastic
- Head and Neck Neoplasms/drug therapy
- Head and Neck Neoplasms/therapy
- Humans
- Infusions, Intravenous
- Lung Neoplasms/drug therapy
- Lung Neoplasms/therapy
- Male
- Neoplasms, Glandular and Epithelial/drug therapy
- Neoplasms, Glandular and Epithelial/therapy
- Recombinant Fusion Proteins/adverse effects
- Recombinant Fusion Proteins/pharmacokinetics
- Recombinant Fusion Proteins/therapeutic use
- Remission Induction
- Safety
Collapse
Affiliation(s)
- J Baselga
- Department of Medicine, Breast Cancer Medicine and Genitourinary Medicine Services, Memorial Sloan-Kettering Cancer Center, New York, NY, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
45
|
Peters HP, Bos M, Seebregts L, Akkermans LM, van Berge Henegouwen GP, Bol E, Mosterd WL, de Vries WR. Gastrointestinal symptoms in long-distance runners, cyclists, and triathletes: prevalence, medication, and etiology. Am J Gastroenterol 1999; 94:1570-81. [PMID: 10364027 DOI: 10.1111/j.1572-0241.1999.01147.x] [Citation(s) in RCA: 105] [Impact Index Per Article: 4.2] [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: 12/11/2022]
Abstract
OBJECTIVE The aim of this study was to determine the prevalence of exercise-related gastrointestinal (GI) symptoms and the use of medication for these symptoms among long-distance runners, cyclists, and triathletes, and to determine the relationship of different variables to GI symptoms. METHODS A mail questionnaire covering the preceding 12 months was sent to 606 well-trained endurance type athletes: 199 runners (114 men and 85 women), 197 cyclists (98 men and 99 women), and 210 triathletes (110 men and 100 women) and sent back by 93%, 88%, and 71% of these groups, respectively. Symptoms were evaluated with respect to the upper (nausea, vomiting, belching, heartburn, chest pain) or lower part of the GI tract (bloating, GI cramps, side ache, urge to defecate, defecation, diarrhea). For statistical analysis, Mann-Whitney U test, Fisher exact test, or Student t test were used. RESULTS Runners experienced more lower (prevalence 71%) than upper (36%) GI symptoms during exercise. Cyclists experienced both upper (67%) and lower (64%) symptoms. Triathletes experienced during cycling both upper (52%) and lower (45%) symptoms, and during running more lower (79%) than upper (54%) symptoms. Bloating, diarrhea, and flatulence occurred more at rest than during exercise among all subjects. In general, exercise-related GI symptoms were significantly related to the occurrence of GI symptoms during nonexercise periods, age, gender, diet, and years of training. The prevalence of medication for exercise-related GI symptoms was 5%, 6%, and 3% for runners, cyclists, and triathletes, respectively. CONCLUSIONS Long-distance running is mainly associated with lower GI symptoms, whereas cycling is associated with both upper and lower symptoms. Triathletes confirm this pattern during cycling and running. The prevalence of medication for exercise-related GI symptoms is lower in the Netherlands in comparison with other countries, in which a prevalence of 10-18% was reported. More research on the possible predisposition of athletes for GI symptoms during exercise is needed.
Collapse
Affiliation(s)
- H P Peters
- Department of Medical Physiology and Sports Medicine, Utrecht University, The Netherlands
| | | | | | | | | | | | | | | |
Collapse
|
46
|
|
47
|
Abstract
Hidden covariation detection (HCD) theory states that when personality characteristics are surreptitiously associated with irrelevant features, these features obtain heuristic value for future evaluations of personality characteristics. According to the theory, subjects are not consciously aware of using such heuristics in their evaluations. We tested these hypotheses by confronting participants with statements that were said to belong to separate individuals, in which the apparent level of intelligence was associated with an irrelevant feature of the person who allegedly made these statements. In line with HCD theory, participants appeared to use this association, unconsciously, to guide their subsequent evaluations. Implications of these findings for HCD theory are discussed.
Collapse
Affiliation(s)
- M Bos
- Department of Medical Psychology & Psychotherapy, Erasmus University Rotterdam, The Netherlands
| | | |
Collapse
|
48
|
Bos M, Vrielink J. Constraints, iteration schemes and convergence criteria for concentration calculations in X-ray fluorescence spectrometry with the use of fundamental parameter methods. Anal Chim Acta 1998. [DOI: 10.1016/s0003-2670(98)00412-7] [Citation(s) in RCA: 7] [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] [Indexed: 10/17/2022]
|
49
|
Abstract
A 27-year-old man with a high-energy, open-fracture dislocation of the ankle underwent debridement and open reduction of his injuries. During surgery a disruption-laceration of the posterior tibial tendon at the level of the fracture of the medial malleolus was found. Repair required location of the proximal muscle and tendon and controlled traction of the musculotendinous unit from its retracted position. Common aspects in the nine previously reported instances of this lesion include relatively high energy of the injury and the fracture type, a transverse fracture in the medial malleolus. Unique to this case was the open injury.
Collapse
Affiliation(s)
- M Bos
- Department of Orthopedic Surgery, New York University Medical Center, New York 10016, USA
| | | |
Collapse
|
50
|
Bos M, Mendelsohn J, Kim YM, Albanell J, Fry DW, Baselga J. PD153035, a tyrosine kinase inhibitor, prevents epidermal growth factor receptor activation and inhibits growth of cancer cells in a receptor number-dependent manner. Clin Cancer Res 1997; 3:2099-106. [PMID: 9815602] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
PD153035 is reported to be a specific and potent inhibitor of the epidermal growth factor (EGF) receptor tyrosine kinase and, to a lesser degree, of the closely related HER2/neu receptor. We show that PD153035 inhibits EGF-dependent EGF receptor phosphorylation and suppresses the proliferation and clonogenicity of a wide panel of EGF receptor-overexpressing human cancer cell lines. EGF receptor autophosphorylation in response to exogenous EGF was completely inhibited at PD153035 concentrations of >75 nM in cells overexpressing the EGF receptor. In contrast, PD153035 only reduced heregulin-dependent tyrosine phosphorylation in HER2/neu-overexpressing cell lines at significantly higher concentrations (1400-2800 nM). PD153035 exposure did not affect the expression of either EGF receptors or HER2/neu. PD153035 caused a dose-dependent growth inhibition of EGF receptor-overexpressing cell lines at low micromolar concentrations, and the IC50 in monolayer cultures was less than 1 microM in most cell lines tested. At doses of up to 2.5 microM, the IC50 for HER2/neu-overexpressing cells was not reached. In colony-forming assays, the PD153035 growth-inhibitory activity in cultures driven by endogenous (autocrine) ligand was correlated with EGF receptor number, with higher activity in cells expressing higher numbers of EGF receptors and only minimal activity in cells expressing normal numbers of EGF receptors but high HER2/neu levels. PD153053 also abolished all growth effects mediated by the addition of exogenous EGF; this condition could be reversed upon removal of the compound. Cotreatment with C225, an anti-EGF receptor-blocking monoclonal antibody, further enhanced the antitumor activity of PD153035, suggesting mechanisms of action for C225 other than competition with ligand binding. This latter finding also suggests that combined anti-EGF receptor strategies may be of enhanced benefit against tumors with high levels of EGF receptor expression.
Collapse
Affiliation(s)
- M Bos
- Laboratory of Receptor Biology and Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, New York 10021, USA
| | | | | | | | | | | |
Collapse
|