Abstract:
BACKGROUND:A desperate need for novel therapies in pediatric ependymoma (EPN) exists, as chemotherapy remains ineffective and radiotherapy often fails. EPN have significant infiltration of immune cells, which correlates with outcome. Immune checkpoint inhibitors provide an avenue for new treatments. This study characterizes tumor-infiltrating immune cells in EPN and aims at predicting candidates for clinical trials using checkpoint inhibitors targeting PD-L1/PD-1 (programmed death ligand 1/programmed death 1). METHODS:The transcriptomic profiles of the primary study cohort of EPN and other pediatric brain tumors were interrogated to identify PD-L1 expression levels. Transcriptomic findings were validated using the western blotting, immunohistochemistry and flow cytometry. RESULTS:We evaluated PD-L1 mRNA expression across four intracranial subtypes of EPN in two independent cohorts and found supratentorial RELA fusion (ST-RELA) tumors to have significantly higher levels. There was a correlation between high gene expression and protein PD-L1 levels in ST-RELA tumors by both the western blot and immunohistochemisty. The investigation of EPN cell populations revealed PD-L1 was expressed on both tumor and myeloid cells in ST-RELA. Other subtypes had little PD-L1 in either tumor or myeloid cell compartments. Lastly, we measured PD-1 levels on tumor-infiltrating T cells and found ST-RELA tumors express PD-1 in both CD4 and CD8 T cells. A functional T-cell exhaustion assay found ST-RELA T cells to be exhausted and unable to secrete IFNγ on stimulation. CONCLUSIONS:These findings in ST-RELA suggest tumor evasion and immunsuppression due to PD-L1/PD-1-mediated T-cell exhaustion. Trials of checkpoint inhibitors in EPN should be enriched for ST-RELA tumors.
journal_name
Pediatr Blood Cancerjournal_title
Pediatric blood & cancerauthors
Witt DA,Donson AM,Amani V,Moreira DC,Sanford B,Hoffman LM,Handler MH,Levy JMM,Jones KL,Nellan A,Foreman NK,Griesinger AMdoi
10.1002/pbc.26960subject
Has Abstractpub_date
2018-05-01 00:00:00pages
e26960issue
5eissn
1545-5009issn
1545-5017journal_volume
65pub_type
杂志文章abstract::We evaluated the effects of body mass index (BMI) on the risk of thromboembolism (TE) in children (<18 years) with hematological malignancies during the period 1990-2009 (n = 359). Obesity was prevalent in 12% of patients: 6% versus 17% prior to and after the year 2000 (P = 0.02). Sixty-one (17%) patients developed TE...
journal_title:Pediatric blood & cancer
pub_type: 杂志文章
doi:10.1002/pbc.23355
更新日期:2012-08-01 00:00:00
abstract:BACKGROUND:Irinotecan is highly active against rhabdomyosarcoma (RMS), yet its tolerability and efficacy in combination with radiation is unknown. We examined local control and toxicities in RMS patients treated with radiotherapy (RT) in combination with radiosensitizing agents irinotecan + carboplatin (I + C). PROCED...
journal_title:Pediatric blood & cancer
pub_type: 杂志文章
doi:10.1002/pbc.24205
更新日期:2013-02-01 00:00:00
abstract:BACKGROUND:Neuroblastoma (NB) is cytogenetically characterized by a number of non-random events. However, knowledge is limited concerning the timing of occurrence and inter-action of many of these events. METHODS:Karyotypic patterns were obtained from a study group of 49 NB tumors that had been analyzed by conventiona...
journal_title:Pediatric blood & cancer
pub_type: 杂志文章
doi:10.1002/pbc.20179
更新日期:2005-02-01 00:00:00
abstract:BACKGROUND:Carboplatin is the most effective drug in retinoblastoma but systemic clearance is variable in young patients. While most regimens use a flat dose, individualized targeting may provide a more adjusted systemic exposure. PATIENTS AND METHODS:We compared carboplatin doses between two groups of children with r...
journal_title:Pediatric blood & cancer
pub_type: 杂志文章
doi:10.1002/pbc.22467
更新日期:2010-07-15 00:00:00
abstract:BACKGROUND:Despite the increasing cure rates for children with acute lymphoblastic leukemia (ALL), patients who relapse continue to have poor prognosis. The Children's Oncology Group (COG) conducted a limited institution Phase II trial of Campath-1H, a monoclonal antibody that targets CD52 on leukemic cells, in childre...
journal_title:Pediatric blood & cancer
pub_type: 杂志文章,多中心研究
doi:10.1002/pbc.22209
更新日期:2009-12-01 00:00:00
abstract:PURPOSE:To report the final analysis of survival outcomes for children with newly diagnosed high-grade glioma (HGG) treated on the "Head Start" (HS) II and III protocols with chemotherapy and intent to avoid irradiation in children <6 years old. PATIENTS AND METHODS:Between 1997 and 2009, 32 eligible children were enr...
journal_title:Pediatric blood & cancer
pub_type: 杂志文章
doi:10.1002/pbc.26118
更新日期:2016-10-01 00:00:00
abstract::Hepatic sinusoidal obstructive syndrome (HSOS) is a frequent complication in patients undergoing haematopoietic stem cell transplant (HSCT), and more rarely, in paediatric patients receiving conventional chemotherapy for solid tumours. Its diagnosis relies on a combination of clinical signs and symptoms such as hepato...
journal_title:Pediatric blood & cancer
pub_type: 杂志文章
doi:10.1002/pbc.24859
更新日期:2014-05-01 00:00:00
abstract::The identification and referral of candidate patients for phase I trials relies heavily on pediatric oncologists who must balance their own perceptions of phase I trials with the desires of the patient and his/her family. A survey was sent to 419 physicians practicing pediatric oncology at 30 different institutions. R...
journal_title:Pediatric blood & cancer
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1002/pbc.24522
更新日期:2013-08-01 00:00:00
abstract::Rhabdomyosarcoma arising within a congenital cystic adenomatoid malformation (CCAM) is an unusual entity. The patient underwent a lobectomy of his right lower lobe of lung due to a CCAM at the age of two. One year later, he developed a solid embryonal rhabdomyosarcoma at the same location. He received 1-year period ch...
journal_title:Pediatric blood & cancer
pub_type: 杂志文章
doi:10.1002/pbc.20481
更新日期:2005-11-01 00:00:00
abstract::Undifferentiated embryonal sarcoma of the liver (UESL) is a rare aggressive mesenchymal pediatric tumor. Previously, reported outcomes have been very poor. Here, we report a single-center experience of five patients with UESL treated with upfront gross total resection and adjuvant chemotherapy. We have a median follow...
journal_title:Pediatric blood & cancer
pub_type: 杂志文章
doi:10.1002/pbc.26154
更新日期:2016-12-01 00:00:00
abstract:BACKGROUND:Although respiratory syncytial virus (RSV) is the leading cause of pediatric lower respiratory tract infections, the burden of RSV in children with sickle cell disease (SCD) is unknown. METHODS:We conducted a retrospective, nested, case-control study of children with SCD <18 years who had respiratory viral ...
journal_title:Pediatric blood & cancer
pub_type: 杂志文章
doi:10.1002/pbc.28759
更新日期:2021-01-01 00:00:00
abstract::Osteoporosis and osteopenia are long-term side effects of bone marrow transplant (BMT). The purpose of this study was to determine the prevalence of bone mineral density (BMD) abnormalities in pediatric patients prior to BMT. Forty-four pediatric patients were evaluated with DEXA scans. The average Z-score was -0.37. ...
journal_title:Pediatric blood & cancer
pub_type: 杂志文章
doi:10.1002/pbc.22102
更新日期:2009-10-01 00:00:00
abstract::A 4-year-old male presented with rapid-onset cranial nerve palsy and ataxia. Brain magnetic resonance imaging (MRI) revealed a pontine mass lesion with discordant conventional and advanced imaging. A stereotactic core biopsy revealed glioblastoma with immunostaining suggestive of histone H3K27M and TP53 mutation, cons...
journal_title:Pediatric blood & cancer
pub_type: 杂志文章
doi:10.1002/pbc.26416
更新日期:2017-08-01 00:00:00
abstract::Hyperglycemia during induction chemotherapy for childhood acute lymphoblastic leukemia (ALL) has been inconsistently associated with risk of infection. We investigated the incidence of hyperglycemia during induction for childhood ALL in a retrospective cohort study of 144 patients treated on a single national protocol...
journal_title:Pediatric blood & cancer
pub_type: 杂志文章
doi:10.1002/pbc.24689
更新日期:2013-12-01 00:00:00
abstract:BACKGROUND:Extramedullary infiltration (EMI) is an occasional clinical symptom in childhood acute myelogenous leukemia (AML), but there is considerable controversy regarding the prognostic significance of EMI in AML. PROCEDURE:We evaluated the frequency and prognostic significance of EMI at diagnosis of AML in childre...
journal_title:Pediatric blood & cancer
pub_type: 杂志文章
doi:10.1002/pbc.20824
更新日期:2007-04-01 00:00:00
abstract:BACKGROUND:Thiotepa and carboplatin are known to be active in central nervous system tumors. Topotecan potentiates the anti-cancer effects of alkylators and crosses the blood-brain barrier. We present ten patients with recurrent or progressive central nervous system malignancies treated on a myeloablative regimen using...
journal_title:Pediatric blood & cancer
pub_type: 临床试验,杂志文章
doi:10.1002/pbc.22347
更新日期:2010-04-01 00:00:00
abstract:BACKGROUND:Follicular variant of papillary thyroid carcinoma (FVPTC) has been shown to be an intermediate entity between papillary (PTC) and follicular/Hurtle cell (FTC) thyroid carcinoma in adults. However, the tumor characteristics and prognosis of FVPTCs has not been studied in the pediatric population and is the fo...
journal_title:Pediatric blood & cancer
pub_type: 杂志文章
doi:10.1002/pbc.25623
更新日期:2015-11-01 00:00:00
abstract::We report two survivors of Wilms tumor (WT) who developed inflammatory myofibroblastic tumor (IMT). The first patient had IMT in the mainstem bronchus 1 year after WT therapy that included vincristine, dactinomycin, doxorubicin (VDA) and whole lung radiation therapy (XRT). The second patient had IMT in the cecum 7 yea...
journal_title:Pediatric blood & cancer
pub_type: 杂志文章
doi:10.1002/pbc.25345
更新日期:2015-06-01 00:00:00
abstract::Epidural spinal cord compression as the initial presentation of acute lymphoblastic leukemia (ALL) is a rare and serious complication. Extramedullary disease is rarely reported in patients with ALL. The most common sites are bone, followed by soft tissue, skin and lymph nodes. We describe a child with common B-lineage...
journal_title:Pediatric blood & cancer
pub_type: 杂志文章
doi:10.1002/pbc.22682
更新日期:2010-10-01 00:00:00
abstract::Phytosterolemia is a rare autosomal recessive sterol storage disease caused by mutations in ABCG5 and ABCG8 genes. A 9-year-old Turkish boy who was presented with exclusively hematologic abnormalities had elevated plant sterol levels. Sequencing of ABCG5 and ABCG8 genes revealed a novel homozygous IVS10-1 G>T mutation...
journal_title:Pediatric blood & cancer
pub_type: 杂志文章
doi:10.1002/pbc.24934
更新日期:2014-08-01 00:00:00
abstract:BACKGROUND:Malignant ectomesenchymoma (MEM) is a soft tissue tumor with heterologous rhabdomyoblastic components believed to arise from pluripotent migratory neural crest cells. To date merely 50 cases have been published and the knowledge about the course of disease and optimal treatment is limited. METHODS:Six patie...
journal_title:Pediatric blood & cancer
pub_type: 杂志文章
doi:10.1002/pbc.24174
更新日期:2013-02-01 00:00:00
abstract::Clinically apparent jaundice is unusual in patients with beta-thalassemia major. Co-inheritance of Gilbert syndrome has been reported to cause hyperbilirubinemia in these subjects. Crigler-Najjar syndrome is another rare disorder of bilirubin metabolism caused by mutation in the gene coding the enzyme UGT1A1. We repor...
journal_title:Pediatric blood & cancer
pub_type: 杂志文章
doi:10.1002/pbc.22313
更新日期:2010-04-01 00:00:00
abstract:BACKGROUND:Thyroid dysfunction has been reported in up to 52% of patients 1.4 years after treatment with (131) I-Metaiodobenzylguanidine (MIBG) in children with neuroblastoma (NBL), despite the use of potassium-iodide (KI). Our aim was to investigate if the incidence and severity of thyroid damage increases in time. M...
journal_title:Pediatric blood & cancer
pub_type: 杂志文章
doi:10.1002/pbc.24681
更新日期:2013-11-01 00:00:00
abstract::Squamous cell carcinoma of the anal canal in children is rare. To date, the etiology and outcome of this condition have been not fully understood. Here, we report an 11-year-old child with anal canal cancer who had concomitant disorders of sex development. Radiotherapy followed by salvage surgery achieved disease-free...
journal_title:Pediatric blood & cancer
pub_type: 杂志文章
doi:10.1002/pbc.25988
更新日期:2016-07-01 00:00:00
abstract::The provision of tele-practice symptom management is often without the provision of evidence-based guidelines. Under the auspices of the Pediatric Oncology Group of Ontario, a nursing task force was established to appraise the evidence and develop guidelines. Promising new efforts to enhance symptom management through...
journal_title:Pediatric blood & cancer
pub_type: 杂志文章,实务指引,评审
doi:10.1002/pbc.22993
更新日期:2011-10-01 00:00:00
abstract::Twenty-eight patients were maintained on subcutaneous immunoglobulin replacement for persistent B-cell aplasia and agammaglobulinemia following CD19-targeted chimeric antigen receptor T-cell therapy for B-cell lymphoblastic leukemia. Patients were transitioned from intravenous to subcutaneous immunoglobulin replacemen...
journal_title:Pediatric blood & cancer
pub_type: 杂志文章
doi:10.1002/pbc.28092
更新日期:2020-03-01 00:00:00
abstract:BACKGROUND:Low expression of HLA class II antigens has been associated with more aggressive disease in several human malignancies including adult adrenocortical tumors (ACT), but their clinical relevance in pediatric ACT needs to be investigated. PROCEDURE:This study analyzed the expression profile of three class II h...
journal_title:Pediatric blood & cancer
pub_type: 杂志文章
doi:10.1002/pbc.25118
更新日期:2014-11-01 00:00:00
abstract::Severe congenital neutropenia (SCN) is a bone marrow failure disease with an autosomal dominant inheritance from mutations in ELANE. Here, we report a 7-week-old Korean male with SCN. His elder sister died from pneumonia at 2 years. Direct sequencing of ELANE in the proband identified a heterozygous novel frameshift m...
journal_title:Pediatric blood & cancer
pub_type: 杂志文章
doi:10.1002/pbc.25654
更新日期:2015-12-01 00:00:00
abstract::With improvements in therapy for childhood cancer, the expectation that most childhood cancer patients will survive and enter adulthood is a reality. There is clear evidence that survivors are at risk for adverse health-related long-term sequelae associated with their cancer and its treatment, requiring appropriate he...
journal_title:Pediatric blood & cancer
pub_type: 杂志文章
doi:10.1002/pbc.20611
更新日期:2006-02-01 00:00:00
abstract::Acute bilineal leukemias are rare and are commonly associated with t(9;22) and MLL abnormalities. Herein, we report a pediatric case of bilineal T/myeloid acute leukemia associated with del (9q)(q13q22) and TLX3/BCL11B fusion due to the cryptic t(5;14)(q35;32). FISH studies confirmed the TLX3/BCL11B fusion in both the...
journal_title:Pediatric blood & cancer
pub_type: 杂志文章
doi:10.1002/pbc.22850
更新日期:2011-03-01 00:00:00