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Nierkens S, Aalbers M, Bleumink R, Boon L, Pieters R. Drug-Induced Type 1 and Type 2 Immune Responses are Characterized by Distinct Profiles of Cell Kinetics, Cytokine Production, and Expression of Co-Stimulatory Molecules in the Popliteal Lymph Node Assay. J Immunotoxicol 2008; 2:141-50. [DOI: 10.1080/15476910500221067] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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127
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Ezendam J, Vos JG, Pieters R. Research Articles Mechanisms of Hexachlorobenzene-Induced Adverse Immune Effects in Brown Norway Rats. J Immunotoxicol 2008; 1:167-75. [DOI: 10.1080/15476910490907026] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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128
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Carfi’ M, Carfi’ M, Croera C, Bowe G, Pieters R, Gribaldo L. TBTC reduces lymphocyte population in human bone marrow long-term culture. Toxicol Lett 2008. [DOI: 10.1016/j.toxlet.2008.06.116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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129
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Bishop-Jodoin M, FitzGerald T, Urie M, Ulin K, Cicchetti M, Pieters R, Kessel S, Yorty J, Hanusik R, Laurie F. The QARC Quality Assurance Program- Improving Standard of Care in the Management of Cancer: Past, Present and Future. Int J Radiat Oncol Biol Phys 2008. [DOI: 10.1016/j.ijrobp.2008.06.1344] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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130
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de Jonge JD, Ezendam J, Knippels LMJ, Penninks AH, Pieters R, van Loveren H. Lactobacillus casei Shirota does not decrease the food allergic response to peanut extract in Brown Norway rats. Toxicology 2008; 249:140-5. [PMID: 18524449 DOI: 10.1016/j.tox.2008.04.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2008] [Revised: 04/21/2008] [Accepted: 04/22/2008] [Indexed: 11/26/2022]
Abstract
Probiotics are claimed to beneficially affect the immune system and their involvement in allergy prevention is being investigated extensively. However, the efficacy of probiotics in allergy prevention remains controversial. We investigated whether the probiotic Lactobacillus casei Shirota (LcS) could modulate the food allergic response against peanut extract (PE) in Brown Norway (BN) rats. For this purpose BN rats were sensitized to PE (0, 1 and 10 mg/(rat d)) by daily oral gavage and the LcS-groups were additionally orally dosed with 1 x 10(9) colony forming units LcS/(rat d). LcS administration had minor effects in animals that were not sensitized. LcS increased Th1-(PE-specific IgG1), whereas the Th1/Th2 ratio based on PE-specific IgG1/PE-specific IgG2a shifted towards Th2 dominance in rats sensitized to PE in the presence of LcS as compared to rats that were sensitized to PE only. LcS stimulated PE-specific IgG2a; but for PE-specific IgE the effect was less clear; whereas there was no overall effect, two rats did not show detectable specific IgE antibodies, whereas the remainder showed significantly increased levels. LcS also resulted in increased numbers of basophilic granulocytes in blood. Furthermore, LcS increased levels of both Th1-(IFN-gamma) and Th2-(IL-4) related cytokines in PE stimulated spleen and mesenteric lymph node (MLN) cells, but predominantly IL-4 levels in the supernatants of both spleens and MLNs. Our study does not support the hypothesis that LcS down-regulates food allergic responses in a BN rat model for food allergy to peanut.
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131
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Haarman EG, Kaspers GJL, Pieters R, Rottier MMA, Veerman AJP. Circumvention of glucocorticoid resistance in childhood leukemia. Leuk Res 2008; 32:1417-23. [PMID: 18395253 DOI: 10.1016/j.leukres.2008.02.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2007] [Revised: 02/03/2008] [Accepted: 02/12/2008] [Indexed: 11/26/2022]
Abstract
In this study, we determined if in vitro resistance to prednisolone and dexamethasone could be circumvented by cortivazol or methylprednisolone, or reversed by meta-iodobenzylguanidine in pediatric lymphoblastic and myeloid leukemia. As there were strong correlations between the LC50 values (drug concentration inducing 50% leukemic cell kill, LCK) of the different glucocorticoids and median prednisolone/methylprednisolone, prednisolone/dexamethasone and prednisolone/cortivazol LC50 ratios did not differ between the leukemia subtypes, we conclude that none of the glucocorticoids had preferential anti-leukemic activity. Meta-iodobenzylguanidine however, partially reversed glucocorticoid resistance in 19% of the lymphoblastic leukemia samples.
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132
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Huang L, Tissing WJE, de Jonge R, van Zelst BD, Pieters R. Polymorphisms in folate-related genes: association with side effects of high-dose methotrexate in childhood acute lymphoblastic leukemia. Leukemia 2008; 22:1798-800. [DOI: 10.1038/leu.2008.66] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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133
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de Haar C, Kool M, Hassing I, Bol M, Lambrecht BN, Pieters R. Lung dendritic cells are stimulated by ultrafine particles and play a key role in particle adjuvant activity. J Allergy Clin Immunol 2008; 121:1246-54. [PMID: 18313130 DOI: 10.1016/j.jaci.2008.01.010] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2007] [Revised: 01/07/2008] [Accepted: 01/08/2008] [Indexed: 02/05/2023]
Abstract
BACKGROUND The adjuvant activity of air pollution particles on allergic airway sensitization is well known, but the cellular mechanisms underlying this adjuvant potential are not clear. OBJECTIVE We sough to study the role of dendritic cells and the costimulatory molecules CD80 and CD86 in the adjuvant activity of ultrafine carbon black particles (CBP). METHODS The proliferation of CFSE-labeled DO11.10 CD4 cells was studied after intranasal exposure to particles and ovalbumin (OVA). Next the frequency of myeloid dendritic cells (mDCs) and plasmacytoid dendritic cells and their expression of CD80 and CD86 were studied in the peribronchial lymph nodes (PBLNs). The expression of costimulatory molecules was also studied on bone marrow-derived mDCs after exposure to CBPs in vitro, and the importance of costimulation in CBP adjuvant activity was assessed by using CD80/CD86-deficient mice or cytotoxic T lymphocyte-associated antigen 4 (CTLA4)-Ig in vivo. RESULTS Our data show that CBPs plus OVA caused proliferation of DO11.10 CD4 cells and high levels of cytokine production in the PBLNs. Furthermore, the combined CBP plus OVA exposure increased the number of mDCs and expression of costimulatory molecules in the PBLNs. In addition, CBPs upregulated the expression of CD80/CD86 molecules on dendritic cells in vitro, which are necessary for the particle adjuvant effects in vivo. CONCLUSION Together this study shows the importance of dendritic cells and costimulation in particle adjuvant activity. Furthermore, we show for the first time that CBPs can also directly induce maturation of dendritic cells.
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Auci DL, Nicoletti F, Pieters R, Reading C, Frincke J, Boyle D, Offner H. 17a‐ethynyl‐5‐androsten‐3ß, 7ß, 17ß‐triol (HE3286): a novel synthetic steroid with broad based anti‐inflammatory activity. FASEB J 2008. [DOI: 10.1096/fasebj.22.1_supplement.1074.32] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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135
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De Backer A, Madern GC, Pieters R, Haentjens P, Hakvoort-Cammel FGAJ, Oosterhuis JW, Hazebroek FWJ. Influence of tumor site and histology on long-term survival in 193 children with extracranial germ cell tumors. Eur J Pediatr Surg 2008; 18:1-6. [PMID: 18302061 DOI: 10.1055/s-2007-989399] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
AIMS Although germ cell tumors (GCT) supposedly share the same cell type of origin, their clinical course differs considerably depending on tumor site and histology. The aim of this work was to study long-term survival stratified for tumor site and tumor histology. MATERIALS AND METHODS The medical records of 193 consecutive infants and children with extracranial GCT were studied. The GCT arose in the following anatomical sites: sacrococcygeal (n = 70), ovary (n = 66), testis (n = 20), retroperitoneum (n = 12), neck (n = 8), mediastinum (n = 7), and miscellaneous (n = 10). Histological analysis revealed 152 teratomas (mature: 115, immature: 37), 27 yolk sac tumors, 8 mixed tumors, 2 dysgerminomas, 2 gonadoblastomas, 1 choriocarcinoma and 1 embryonal carcinoma. RESULTS Overall survival (OS) for the whole patient group was 0.91 +/- 0.02, and event-free survival (EFS) was 0.88 +/- 0.02 at ten years. Patients with gonadal GCT had a higher probability of OS than those with extragonadal GCT (p = 0.029). Patients with cervical and mediastinal tumors had a lower probability of EFS than those with gonadal, retroperitoneal or sacrococcygeal GCT (p = 0.018). Patients with choriocarcinoma, embryonal carcinoma, immature teratoma, yolk sac tumor and mixed GCT had a lower probability of EFS than patients with mature teratoma or gonadoblastoma (p < 0.001). CONCLUSIONS Mortality in children with extracranial germ cell tumors is not only dictated by malignant histology, but also, as in the case of mature teratomas, by occurrence at certain sites.
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136
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Van Vlierberghe P, Homminga I, Zuurbier L, Gladdines-Buijs J, van Wering ER, Horstmann M, Beverloo HB, Pieters R, Meijerink JPP. Cooperative genetic defects in TLX3 rearranged pediatric T-ALL. Leukemia 2008; 22:762-70. [PMID: 18185524 DOI: 10.1038/sj.leu.2405082] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
T-cell acute lymphoblastic leukemia (T-ALL) is an aggressive neoplastic disorder, in which multiple genetic abnormalities cooperate in the malignant transformation of thymocytes. About 20% of pediatric T-ALL cases are characterized by TLX3 expression due to a cryptic translocation t(5;14)(q35;q32). Although a number of collaborating genetic events have been identified in TLX3 rearranged T-ALL patients (NOTCH1 mutations, p15/p16 deletions, NUP214-ABL1 amplifications), further elucidation of additional genetic lesions could provide a better understanding of the pathogenesis of this specific T-ALL subtype. In this study, we used array-CGH to screen TLX3 rearranged T-ALL patients for new chromosomal imbalances. Array-CGH analysis revealed five recurrent genomic deletions in TLX3 rearranged T-ALL, including del(1)(p36.31), del(5)(q35), del(13)(q14.3), del(16)(q22.1) and del(19)(p13.2). From these, the cryptic deletion, del(5)(q35), was exclusively identified in about 25% of TLX3 rearranged T-ALL cases. In addition, 19 other genetic lesions were detected once in TLX3 rearranged T-ALL cases, including a cryptic WT1 deletion and a deletion covering the FBXW7 gene, an U3-ubiquitin ligase that mediates the degradation of NOTCH1, MYC, JUN and CyclinE. This study provides a genome-wide overview of copy number changes in TLX3 rearranged T-ALL and offers great new challenges for the identification of new target genes that may play a role in the pathogenesis of T-ALL.
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137
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Van Vlierberghe P, Beverloo HB, Buijs-Gladdines J, van Wering ER, Horstmann M, Pieters R, Meijerink JPP. Monoallelic or biallelic LMO2 expression in relation to the LMO2 rearrangement status in pediatric T-cell acute lymphoblastic leukemia. Leukemia 2007; 22:1434-7. [DOI: 10.1038/sj.leu.2405063] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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138
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Stam RW, den Boer ML, Schneider P, Meier M, Beverloo HB, Pieters R. D-HPLC analysis of the entire FLT3 gene in MLL rearranged and hyperdiploid acute lymphoblastic leukemia. Haematologica 2007; 92:1565-8. [DOI: 10.3324/haematol.11220] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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139
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Hartman A, van den Bos C, van Dartel N, Stijnen T, Pieters R. No adverse effect of vincristine on handwriting in children after completion of therapy. Pediatr Blood Cancer 2007; 49:841-5. [PMID: 16960868 DOI: 10.1002/pbc.21023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
BACKGROUND Long-term writing difficulties in children after treatment with vincristine for acute lymphoblastic leukemia, Wilms tumor, B non-Hodgkin lymphoma, and malignant mesenchymal tumors, were investigated. PROCEDURE Handwriting of 33 survivors and 33 controls matched for age, sex, and grade, was assessed with the BHK-scale. The examiner was blinded for whether a child was a case or a control. RESULTS No significant difference in writing speed was found. Mean difference in number of letters produced during 5 min was 6.4 (+/-67.1, range -103 to +169). No significant difference was found in quality of writing scores; mean difference in points was 1.5 (+/-7.7, range -19 to +22). Cumulative vincristine dose, age at diagnosis or time since completion of treatment did not affect writing speed or quality. CONCLUSION Chemotherapy, including vincristine, does not lead to long-term problems in speed or quality of writing in children treated for cancer.
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140
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van Grotel M, Meijerink JPP, van Wering ER, Langerak AW, Beverloo HB, Buijs-Gladdines JGCAM, Burger NB, Passier M, van Lieshout EM, Kamps WA, Veerman AJP, van Noesel MM, Pieters R. Prognostic significance of molecular-cytogenetic abnormalities in pediatric T-ALL is not explained by immunophenotypic differences. Leukemia 2007; 22:124-31. [PMID: 17928886 DOI: 10.1038/sj.leu.2404957] [Citation(s) in RCA: 112] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Pediatric T-cell acute lymphoblastic leukemia (T-ALL) is characterized by chromosomal rearrangements possibly enforcing arrest at specific development stages. We studied the relationship between molecular-cytogenetic abnormalities and T-cell development stage to investigate whether arrest at specific stages can explain the prognostic significance of specific abnormalities. We extensively studied 72 pediatric T-ALL cases for genetic abnormalities and expression of transcription factors, NOTCH1 mutations and expression of specific CD markers. HOX11 cases were CD1 positive consistent with a cortical stage, but as 4/5 cases lacked cytoplasmatic-beta expression, developmental arrest may precede beta-selection. HOX11L2 was especially confined to immature and pre-AB developmental stages, but 3/17 HOX11L2 mature cases were restricted to the gammadelta-lineage. TAL1 rearrangements were restricted to the alphabeta-lineage with most cases being TCR-alphabeta positive. NOTCH1 mutations were present in all molecular-cytogenetic subgroups without restriction to a specific developmental stage. CALM-AF10 was associated with early relapse. TAL1 or HOX11L2 rearrangements were associated with trends to good and poor outcomes, respectively. Also cases with high vs low TAL1 expression levels demonstrated a trend toward good outcome. Most cases with lower TAL1 levels were HOX11L2 or CALM-AF10 positive. NOTCH1 mutations did not predict for outcome. Classification into T-cell developmental subgroups was not predictive for outcome.
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141
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Pieters R, Ludwig I, Nierkens S. Development of a strategy to predict immune-mediated drug-hypersensitivity reactions. Toxicol Lett 2007. [DOI: 10.1016/j.toxlet.2007.05.116] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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142
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Corsini E, Carfì M, Gribaldo L, Pallardy M, Pieters R, Vandebriel R, Vohr HW, Van Loveren H. In vitro approaches to the assessment of immunotoxicity. Toxicol Lett 2007. [DOI: 10.1016/j.toxlet.2007.05.039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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143
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Carfi’ M, Croera C, Ferrario D, Campi V, Bowe G, Pieters R, Gribaldo L. Tributyltin chloride induces adipocyte differentiation in long-term human bone marrow cultures. Toxicol Lett 2007. [DOI: 10.1016/j.toxlet.2007.05.371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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144
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Appel I, Hop W, Pieters R. AGE-RELATED CHANGES BY ASPARAGINASE ON COAGULATION AND FIBRINOLYSIS IN CHILDHOOD ACUTE LYMPHOBLASTIC LEUKEMIA (ALL). J Thromb Haemost 2007. [DOI: 10.1111/j.1538-7836.2007.tb00096.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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145
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Jansen G, Pieters R. The role of impaired transport in (pre)clinical resistance to methotrexate: insights on new antifolates. Drug Resist Updat 2007; 1:211-8. [PMID: 17092808 DOI: 10.1016/s1368-7646(98)80042-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/1997] [Revised: 01/20/1998] [Accepted: 01/20/1998] [Indexed: 11/17/2022]
Abstract
Impaired transport appears to be a common mechanism of resistance of neoplastic cells to the antifolate methotrexate. The extensive knowledge of the molecular, biochemical and functional properties of the membrane transport systems for folates, in particular the reduced folate carrier (RFC) and membrane folate receptors (MFR), has made an important contribution to the rational design of novel antifolates that are either more efficiently internalized via these transporters or can simply bypass these transport routes. The current status of exploiting the RFC and MFR for transport of novel antifolates active in preclinical model systems and a clinical setting will be reviewed, with a special reference to childhood acute lymphoblastic leukemia (ALL) and acute non-lymphoblastic leukemia (ANLL).
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146
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de Jonge JD, Ezendam J, Knippels LMJ, Odink J, Pourier MS, Penninks AH, Pieters R, van Loveren H. Bis(tributyltin)oxide (TBTO) decreases the food allergic response against peanut and ovalbumin in Brown Norway rats. Toxicology 2007; 239:68-76. [PMID: 17669578 DOI: 10.1016/j.tox.2007.06.090] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2007] [Revised: 06/19/2007] [Accepted: 06/19/2007] [Indexed: 01/07/2023]
Abstract
Other factors than the allergen itself may be of importance in the development of food allergy. This report describes the influence of the immunosuppressive compound bis(tributyltin)oxide (TBTO), present in the food chain, on the development of food allergy to peanut or ovalbumin in Brown Norway (BN) rats. To study these effects BN rats were sensitized to either 1 or 10mg peanut or ovalbumin by daily oral gavage and the TBTO-groups were fed a diet containing 80 mg TBTO per kg diet. Co-exposure to TBTO not only resulted in decreased general immunologic parameters such as weights of mesenteric lymph nodes and Peyer's patches, lymphocyte proliferation rates in splenocytes, but also on allergic parameters. In the peanut allergen-model TBTO decreased allergen-specific Th2 cytokine production by spleen cells, number of eosinophilic and basophilic granulocytes in the blood and production of mast cell protease II after oral food challenge. In the ovalbumin allergen-model TBTO decreased the number of eosinophilic and basophilic granulocytes, allergen-specific IgE and production of mast cell protease II after oral food challenge. The data imply that in the process of risk assessment of food allergy attention should be given to immunomodulating compounds present in the diet.
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147
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Appel IM, van Kessel-Bakvis C, Stigter R, Pieters R. Influence of two different regimens of concomitant treatment with asparaginase and dexamethasone on hemostasis in childhood acute lymphoblastic leukemia. Leukemia 2007; 21:2377-80. [PMID: 17554375 DOI: 10.1038/sj.leu.2404793] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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148
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de Haar C, Hassing I, Bol M, Bleumink R, Pieters R. Ultrafine but not fine particulate matter causes airway inflammation and allergic airway sensitization to co-administered antigen in mice. Clin Exp Allergy 2007; 36:1469-79. [PMID: 17083358 DOI: 10.1111/j.1365-2222.2006.02586.x] [Citation(s) in RCA: 124] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Airborne particulate matter (PM) is an important factor associated with the enhanced prevalence of respiratory allergy. The PM adjuvant activity on allergic sensitization is a possible mechanism of action involved, and the induction of airway inflammation is suggested to be of importance in PM-induced adjuvant activity. OBJECTIVE Because differently sized PM have different toxic potentials, we studied the role of particle size in the induction of airway inflammation and allergic sensitization. This was done using fine (0.250 and 0.260 micro m) and ultrafine (0.029 and 0.014 micro m) titanium dioxide (TiO(2)) and carbon black particles (CBP) with known differences in airway toxicity. METHODS Mice were intranasally exposed to ovalbumin (OVA) alone or in combination with one of the different particles. The induction of airway inflammation and the immune adjuvant activity were studied in the lungs and lung-draining peribronchial lymph nodes (PBLN) at day 8. OVA-specific antibodies were measured at day 21, and the development of allergic airway inflammation was studied after OVA challenges (day 28). RESULTS When administered at the same total particle mass (200 micro g), exposure to ultrafine TiO(2) and CBP-induced airway inflammation, and had immune adjuvant activity. The latter was shown by increasing both the PBLN cell numbers and the production of OVA-specific T-helper type 2 (Th2) cytokines (IL-4, IL-5, IL-10 and IL-13). Whereas OVA-specific IgE and IgG1 levels in serum were only increased in animals exposed to the ultrafine TiO(2), allergic airway inflammation could be detected in both ultrafine TiO(2)-and CBP-treated groups after challenges with OVA. CONCLUSION Our data show that only the ultrafine particles, with a small diameter and a large total surface area/mass, cause airway inflammation and have immune adjuvant activity in the current model supporting the hypothesis that particle toxicity is site-dependent and related to adjuvant activity.
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149
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van Wijk F, Nierkens S, de Jong W, Wehrens EJM, Boon L, van Kooten P, Knippels LMJ, Pieters R. The CD28/CTLA-4-B7 Signaling Pathway Is Involved in Both Allergic Sensitization and Tolerance Induction to Orally Administered Peanut Proteins. THE JOURNAL OF IMMUNOLOGY 2007; 178:6894-900. [PMID: 17513738 DOI: 10.4049/jimmunol.178.11.6894] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Dendritic cells are believed to play an essential role in regulating the balance between immunogenic and tolerogenic responses to mucosal Ags by controlling T cell differentiation and activation via costimulatory and coinhibitory signals. The CD28/CTLA-4-CD80/CD86 signaling pathway appears to be one of the most important regulators of T cell responses but its exact role in responses to orally administered proteins remains to be elucidated. In the present study, the involvement of the CD28/CTLA-4-CD80/CD86 costimulatory pathway in the induction of allergic sensitization and oral tolerance to peanut proteins was investigated. In both an established C3H/HeOuJ mouse model of peanut hypersensitivity and an oral tolerance model to peanut, CD28/CTLA-4-CD80/CD86 interactions were blocked using the fusion protein CTLA-4Ig. To examine the relative contribution of CD80- and CD86-mediated costimulation in these models, anti-CD80 and anti-CD86 blocking Abs were used. In the hypersensitivity model, CTLA-4Ig treatment prevented the development of peanut extract-induced cytokine responses, peanut extract-specific IgG1, IgG2a, and IgE production and peanut extract-induced challenge responses. Blocking of CD80 reduced, whereas anti-CD86 treatment completely inhibited, the induction of peanut extract-specific IgE. Normal tolerance induction to peanut extract was found following CTLA-4Ig, anti-CD86, or anti-CD80 plus anti-CD86 treatment, whereas blockade of CD80 impaired the induction of oral tolerance. We show that CD28/CTLA-4-CD80/CD86 signaling is essential for the development of allergic responses to peanut and that CD86 interaction is most important in inducing peanut extract-specific IgE responses. Additionally, our data suggest that CD80 but not CD86 interaction with CTLA-4 is crucial for the induction of low dose tolerance to peanut.
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MESH Headings
- Abatacept
- Administration, Oral
- Allergens/administration & dosage
- Allergens/immunology
- Allergens/metabolism
- Animals
- Antibodies, Blocking/administration & dosage
- Antigens, CD/immunology
- Antigens, CD/metabolism
- Antigens, CD/physiology
- Antigens, Differentiation/immunology
- Antigens, Differentiation/metabolism
- Antigens, Differentiation/physiology
- Arachis/immunology
- B7-1 Antigen/immunology
- B7-1 Antigen/metabolism
- B7-1 Antigen/physiology
- CD28 Antigens/immunology
- CD28 Antigens/metabolism
- CD28 Antigens/physiology
- CTLA-4 Antigen
- Cells, Cultured
- Disease Models, Animal
- Food Hypersensitivity/immunology
- Immune Tolerance/immunology
- Immunoconjugates/administration & dosage
- Immunoglobulin E/biosynthesis
- Immunoglobulin E/blood
- Immunoglobulin E/physiology
- Ligands
- Mice
- Plant Extracts/administration & dosage
- Plant Extracts/immunology
- Plant Extracts/metabolism
- Plant Proteins/administration & dosage
- Plant Proteins/immunology
- Plant Proteins/metabolism
- Signal Transduction/immunology
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150
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Maas MH, Cransberg K, van Grotel M, Pieters R, van den Heuvel-Eibrink MM. Renin-induced hypertension in Wilms tumor patients. Pediatr Blood Cancer 2007; 48:500-3. [PMID: 16794999 DOI: 10.1002/pbc.20938] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
BACKGROUND Since the report that hypertension associated with Wilms tumor (WT) may be renin-induced, no larger series than 13 patients have been published. Nevertheless, angiotensin converting enzyme (ACE) inhibitors have become treatment of choice for hypertension in WT patients. The purpose of this study was to investigate the correlation between plasma renin levels and blood pressure in a larger cohort of WT patients. PROCEDURE In this retrospective, single-center study, data on blood pressure and plasma renin were analyzed in 86 WT patients treated according to the consecutive SIOP protocols 6, 9, 93-01, and 2001. RESULTS At diagnosis, 47 WT patients suffered from hypertension (55%). In 31 of these patients plasma renin levels were analyzed; increased plasma renin levels were found in 25/31 patients (81%). In contrast, normal plasma renin levels were measured in 8/13 of the patients with a normal blood pressure (P = 0.012). Twenty-eight children received antihypertensive treatment before surgery, in 25 of them blood pressure normalized before surgery. Blood pressure was normal directly after surgery in all patients but 4, in whom blood pressure recovered to normal within a few weeks. CONCLUSIONS This retrospective study shows that hypertension in WT patients is associated with elevated plasma renin levels, indicating that ACE inhibitors may be a good therapeutic option in at least a subset of WT patients with hypertension before nephrectomy.
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