Barra Mansa, Brazil

A Multi-Institution Study of TGFβ Imprinted, Ex Vivo Expanded Universal Donor NK Cell Infusions as Adoptive Immunotherapy in Combination With Gemcitabine and Docetaxel in Patients With Relapsed or Refractory Pediatric Bone and Soft Tissue

This is a multi-center study with rolling safety and toxicity analysis, to determine the safety and efficacy of the addition of adoptive transfer of universal donor, TGFβ imprinted (TGFβi), expanded NK cells to the pediatric sarcoma salvage chemotherapeutic regimen gemcitabine/docetaxel (GEM/DOX) for treatment of relapsed and refractory pediatric sarcomas, identify toxicities related to treatment with GEM/DOX + TGFβi expanded NK cells, and assess in vivo persistence of expanded, universal donor, TGFβi NK cells after adoptive transfer and correlate with clinical outcomes. The planned therapy will involve 8 cycles of 21 days each consisting of gemcitabine, docetaxel, supportive dexamethasone and peg-filgrastim, and universal donor, TGFβi ex vivo expanded NK cells (Cycles 1-6).

Non-Invasive Diagnosis of Pediatric Pulmonary Invasive Mold Infections

The Safety and Efficacy of Alpha-1 Antitrypsin (AAT) for the Prevention of Graft-versus-host Disease (GVHD) in Patients Receiving Hematopoietic Cell Transplant

Inotuzumab Ozogamicin and Post-Induction Chemotherapy in Treating Patients With High-Risk B-ALL, Mixed Phenotype Acute Leukemia, and B-LLy

PRIMARY OBJECTIVE: I. To compare in a randomized manner the 5-year disease-free survival (DFS) for children and young adults with High Risk (HR) B-cell acute lymphoblastic leukemia (B-ALL) treated with modified Berlin-Frankfurt-Munster (mBFM) chemotherapy without delayed intensification (DI) part 2, but with the addition of two blocks of inotuzumab ozogamicin, versus those treated with full mBFM chemotherapy backbone including DI Part 2 without the addition of inotuzumab ozogamicin. SECONDARY OBJECTIVES: I. To describe the 5-year DFS for a favorable risk subset of National Cancer Institute (NCI) HR B-ALL (HR-Fav) when treated with mBFM chemotherapy with a single high-dose methotrexate (HD-MTX) interim maintenance (IM) phase and treatment duration of 2 years from the start of IM regardless of sex. II. To determine the toxicity and tolerability of inotuzumab ozogamicin integrated into the mBFM chemotherapy backbone in HR B-ALL including toxicity experienced during phases of therapy subsequent to inotuzumab ozogamicin. III. To describe the 5-year event-free survival (EFS) for patients with mixed phenotype acute leukemia (MPAL) receiving mBFM HR B-ALL therapy that includes a second IM phase with Capizzi intravenous (IV) methotrexate without leucovorin rescue plus pegaspargase or calaspargase pegol (C-MTX). IV. To describe the 5-year EFS for patients with disseminated (Murphy stage III-IV) B-cell lymphoblastic lymphoma (B-LLy) receiving mBFM HR B-ALL therapy that includes a second IM phase with C-MTX. EXPLORATORY OBJECTIVES: I. To describe the therapy administered, disease response, and survival outcomes of patients with MPAL who come off protocol therapy due to poor disease response to ALL therapy either during Induction, at end of induction (EOI), or at end of consolidation (EOC). II. To define the prevalence and significance of minimal marrow disease (MMD) at diagnosis and bone marrow minimal residual disease (MRD) at EOI in disseminated B-LLy. III. To determine the impact of proposed adherence-enhancing interventions on adherence to oral 6-mercaptopurine in patients with ALL. OUTLINE: All patients receive the same Induction and Consolidation chemotherapy. Patients with HR-Fav B-ALL are assigned to Arm I. Patients with HR B-ALL are randomized to Arm II or III. Patients with MPAL are assigned to Arm IV, and patients with B-LLy are assigned to Arm V. All patients with B-ALL receive Induction and Consolidation therapy: INDUCTION: Patients receive cytarabine intrathecally (IT) on day 1 and central nervous system (CNS)2 patients also receive cytarabine IT on days 4, 5 or 6 and 11 or 12. Patients also receive vincristine intravenously (IV) on days 1, 8, 15, and 22, daunorubicin IV over 1-15 minutes days 1, 8, 15, and 22, pegaspargase or calaspargase pegol IV over 1-2 hours or pegaspargase intramuscularly (IM) on day 4, and methotrexate IT on days 8 and 29 (and on days 15 and 22 for CNS3 patients). Patients < 10 years old receive dexamethasone orally (PO) twice daily (BID) or IV on days 1-14; patients >= 10 years old receive prednis(ol)one PO BID or IV on days 1-28. Treatment continues for 5 weeks in the absence of disease progression or unacceptable toxicity. Calaspargase pegol can only be given to patients less than 22 years of age. CONSOLIDATION: Patients receive cyclophosphamide IV over 30-60 minutes on days 1 and 29, cytarabine IV over 1-30 minutes or subcutaneously (SC) on days 1-4, 8-11, 29-32, and 36-39, mercaptopurine PO once daily (QD) on days 1-14 and 29-42, and methotrexate IT on days 1, 8, 15, and 22 (CNS3 patients receive methotrexate IT on days 1 and 8). Patients also receive vincristine IV on days 15, 22, 43, and 50, and pegaspargase or calaspargase pegol IV over 1-2 hours or pegaspargase IM on days 15 and 43. Treatment continues for 8 weeks in the absence of disease progression or unacceptable toxicity. Additionally, patients with testicular disease at diagnosis that does not resolve by the end of induction will undergo radiation therapy over 12 once daily fractions. Calaspargase pegol can only be given to patients less than 22 years of age. POST-CONSOLIDATION THERAPY: After Consolidation, based on clinical features and response, patients with B-ALL are designated as HR-Fav or HR B-ALL. Patients with HR-Fav B-ALL are assigned to Arm I. Patients with HR B-ALL are randomized to Arm II or III. Patients with MPAL and B-LLy are assigned to therapy arms (Arms IV and V) that are identical to Arm II. Patients that are < 10 years, have CNS1, no testicular leukemia, with favorable cytogenetics (ETV6 RUNX1 fusion or double trisomies [4 and 10]), =< 24 hours of steroids in the two weeks prior to diagnosis, and EOI MRD < 0.01% are assigned to Arm I. Patients with HR B-ALL who are surface CD22 positive at diagnosis and have MRD < 0.01% by the end of Consolidation, are randomized to either Arm II or III. ARM I: HR-FAV B-ALL (Patients that are < 10 years, have CNS1 status, no testicular leukemia, with favorable cytogenetics (ETV6 RUNX1 fusion or double trisomies [4 and 10]), =< 24 hours of steroids in the two weeks prior to diagnosis, and EOI MRD < 0.01%) INTERIM MAINTENANCE: Patients receive vincristine IV on days 1, 15, 29, and 43, high dose methotrexate IV over 24 hours on days 1, 15, 29, and 43, leucovorin PO or IV on days 3-4, 17-18, 31-32, and 45-46, mercaptopurine PO QD on days 1-14, 15-28, 29-42, and 43-56, and methotrexate IT on days 1 and 29. Treatment continues for 9 weeks in the absence of disease progression or unacceptable toxicity. DELAYED INTENSIFICATION (PART I): Patients receive methotrexate IT on day 1, dexamethasone PO BID or IV on days 1-7 and 15-21, vincristine IV on days 1, 8, and 15, doxorubicin IV over 1-15 minutes or up to 1 hour on days 1, 8, and 15, and pegaspargase or calaspargase pegol IV over 1-2 hours or pegaspargase IM on day 4. Treatment (Parts I and II of Delayed Intensification) continues for 9 weeks in the absence of disease progression or unacceptable toxicity. Calaspargase pegol can only be given to patients less than 22 years of age. DELAYED INTENSIFICATION (PART II): Patients receive cyclophosphamide IV over 30-60 minutes on day 29, thioguanine PO on days 29-42, cytarabine IV over 1-30 minutes or SC on days 29-32 and 36-39, methotrexate IT on days 29 and 36, vincristine IV on days 43 and 50, and pegaspargase or calaspargase pegol IV over 1-2 hours or pegaspargase IM on day 43. Treatment (Parts I and II of Delayed Intensification) continues for 9 weeks in the absence of disease progression or unacceptable toxicity. Calaspargase pegol can only be given to patients less than 22 years of age. MAINTENANCE: Patients receive methotrexate IT on days 1 and 29 for cycles 1-4, and day 1 for subsequent cycles. Patients also receive vincristine IV on day 1, prednisolone PO BID or IV on days 1-5, mercaptopurine PO QD on days 1-84, and methotrexate PO on days 8, 15, 22, 29 (excluded in cycles 1-4), 36, 43, 50, 57, 64, 71, and 78. Cycles repeat every 12 weeks for up to 2 years in the absence of disease progression or unacceptable toxicity. Patients with HR B-ALL who have MRD < 0.01% by the end of Consolidation, and leukemic blasts positive for surface CD22 at diagnosis are randomized to Arm II or Arm III. ARM II: HR B-ALL (CONTROL) INTERIM MAINTENANCE I: Patients receive vincristine IV on days 1, 15, 29 and 43, high dose methotrexate IV over 24 hours on days 1, 15, 29 and 43, leucovorin PO or IV on days 3-4, 17-18, 31-32, 45-46, mercaptopurine PO QD on days 1-14, 15-28, 29-42, and 43-56, and methotrexate IT on days 1 and 29. Treatment continues for 9 weeks in the absence of disease progression or unacceptable toxicity. DELAYED INTENSIFICATION (PART I): Patients receive methotrexate IT on day 1, dexamethasone PO BID or IV on days 1-7 and 15-21, vincristine IV on days 1, 8, and 15, doxorubicin IV over 1-15 minutes or up to 1 hour on days 1, 8, and 15, and pegaspargase or calaspargase pegol IV over 1-2 hours or pegaspargase IM on day 4. Treatment (Parts I and II of Delayed Intensification) continues for 9 weeks in the absence of disease progression or unacceptable toxicity. Calaspargase pegol can only be given to patients less than 22 years of age. DELAYED INTENSIFICATION (PART II): Patients receive cyclophosphamide IV over 30-60 minutes on day 29, thioguanine PO on days 29-42, cytarabine IV over 1-30 minutes or SC on days 29-32 and 36-39, methotrexate IT on days 29 and 36, vincristine IV on days 43 and 50, and pegaspargase or calaspargase pegol IV over 1-2 hours or pegaspargase IM on day 43. Treatment (Parts I and II of Delayed Intensification) continues for 9 weeks in the absence of disease progression or unacceptable toxicity. Calaspargase pegol can only be given to patients less than 22 years of age. INTERIM MAINTENANCE II: Patients receive vincristine on days 1, 11, 21, 31 and 41, methotrexate IV over 2-15 minutes or 10-15 minutes on days 1, 11, 21, 31, and 41, methotrexate IT on days 1 and 31, and pegaspargase or calaspargase pegol IV over 1-2 hours on days 2 and 22 (pegaspargase) or 23 (calaspargase) or pegaspargase IM on days 2 and 22. Treatment continues for 8 weeks in the absence of disease progression or unacceptable toxicity. Calaspargase pegol can only be given to patients less than 22 years of age. ARM III: HR B-ALL (EXPERIMENTAL) INOTUZUMAB OZOGAMICIN (InO) BLOCK 1: Patients receive inotuzumab ozogamicin IV over 60 minutes on days 1, 8, and 15 and methotrexate IT on day 1. Treatment continues for 4 weeks in the absence of disease progression or unacceptable toxicity. INTERIM MAINTENANCE I: Patients receive vincristine IV on days 1, 15, 29 and 43, high dose methotrexate IV over 24 hours on days 1, 15, 29, and 43, leucovorin PO or IV on days 3-4, 17-18, 31-32, and 45-46, mercaptopurine PO on days 1-14, 15-28, 29-42, and 43-56, and methotrexate IT on days 1 and 29. Treatment continues for 9 weeks in the absence of disease progression or unacceptable toxicity. DELAYED INTENSIFICATION (Part I): Patients receive methotrexate IT on day 1, dexamethasone PO BID or IV on days 1-7 and 15-21, vincristine IV on days 1, 8, and 15, doxorubicin IV over 1-15 minutes or up to 1 hour on days 1, 8, and 15, and pegaspargase or calaspargase pegol IV over 1-2 hours or pegaspargase IM on day 4. Treatment (Parts I and II of Delayed Intensification) continues for 5 weeks in the absence of disease progression or unacceptable toxicity. Calaspargase pegol can only be given to patients less than 22 years of age. InO BLOCK 2: Patients receive inotuzumab ozogamicin IV over 60 minutes on days 1, 8, and 15. Treatment continues for 4 weeks in the absence of disease progression or unacceptable toxicity. INTERIM MAINTENANCE II: Patients receive vincristine IV on days 1, 11, 21, 31, and 41, methotrexate IV on days 1, 11, 21, 31, and 41, methotrexate IT on days 1 and 31, and pegaspargase or calaspargase pegol IV over 1-2 hours on days 2 and 22 (pegaspargase) or 23 (calaspargase) or pegaspargase IM on days 2 and 22. Treatment continues for 8 weeks in the absence of disease progression or unacceptable toxicity. Calaspargase pegol can only be given to patients less than 22 years of age. ARMS II AND III: HR B-ALL MAINTENANCE: Patients receive vincristine IV on day 1, prednisolone PO BID or IV on days 1-5, mercaptopurine PO on days 1-84, methotrexate PO on days 8, 15, 22, 29 (excluded in cycles 1 and 2), 36, 43, 50, 57, 64, 71 and 78, and methotrexate IT on days 1 (and 29 of cycles 1-2 for patients who do not receive cranial radiation). Cycles repeat every 12 weeks for up to 2 years in the absence of disease progression or unacceptable toxicity. Patients with CNS3 disease undergo cranial radiation therapy over 10 fractions during the first 4 weeks. ARM IV: MPAL INDUCTION: Patients receive cytarabine IT on day 1 and CNS2 patients also receive cytarabine IT on days 4, 5 or 6 and 11 or 12. Patients also receive vincristine IV on days 1, 8, 15, and 22, daunorubicin IV over 1-15 minutes days 1, 8, 15, and 22, pegaspargase or calaspargase pegol IV over 1-2 hours or pegaspargase IM on day 4, and methotrexate IT on days 8 and 29 (and on days 15 and 22 for CNS3 patients). Patients < 10 years old receive dexamethasone PO BID or IV on days 1-14; patients >= 10 years old receive prednisolone PO BID or IV on days 1-28. Treatment continues for 5 weeks in the absence of disease progression or unacceptable toxicity. Calaspargase pegol can only be given to patients less than 22 years of age. CONSOLIDATION: Patients receive cyclophosphamide IV over 30-60 minutes on days 1 and 29, cytarabine IV over 1-30 minutes or SC on days 1-4, 8-11, 29-32, and 36-39, mercaptopurine PO on days 1-14 and 29-42, methotrexate IT on days 1, 8, 15, and 22 (excluded on days 15 and 22 for CNS3 patients), vincristine IV on days 15, 22, 43, and 50, and pegaspargase or calaspargase pegol IV over 1-2 hours or pegaspargase IM on days 15 and 43. Treatment continues for 8 weeks in the absence of disease progression or unacceptable toxicity. Patients with testicular disease at diagnosis that does not resolve by the end of induction will and continued evidence of testicular disease at end of induction undergo testicular radiation over 12 once-daily fractions. Calaspargase pegol can only be given to patients less than 22 years of age. ARM V: B-LLY INDUCTION: Patients receive cytarabine IT on day 1 and CNS2 patients also receive cytarabine IT on days 4, 5 or 6 and 11 or 12. Patients also receive vincristine IV on days 1, 8, 15, and 22, daunorubicin IV over 1-15 minutes days 1, 8, 15, and 22, pegaspargase or calaspargase pegol IV over 1-2 hours or pegaspargase IM on day 4, and methotrexate IT on days 8 and 29 (and on days 15 and 22 for CNS3 patients). Patients < 10 years old receive dexamethasone PO BID or IV on days 1-14; patients >= 10 years old receive prednisolone PO BID or IV on days 1-28. Treatment continues for 5 weeks in the absence of disease progression or unacceptable toxicity. Calaspargase pegol can only be given to patients less than 22 years of age. CONSOLIDATION: Patients receive cyclophosphamide IV over 30-60 minutes on days 1 and 29, cytarabine IV over 1-30 minutes or SC on days 1-4, 8-11, 29-32, and 36-39, mercaptopurine PO on days 1-14 and 29-42, methotrexate IT on days 1, 8, 15, and 22 (excluded on days 15 and 22 CNS3 patients), vincristine IV on days 15, 22, 43, and 50, and pegaspargase or calaspargase pegol IV over 1-2 hours or pegaspargase IM on days 15 and 43. Treatment continues for 8 weeks in the absence of disease progression or unacceptable toxicity. Patients with testicular disease at diagnosis that does not resolve by the end of induction will and continued evidence of testicular disease at end of induction undergo testicular radiation therapy over 12 once-daily fractions. Calaspargase pegol can only be given to patients less than 22 years of age. ARM IV AND V: MPAL AND B-LLY (Post-Consolidation Therapy) INTERIM MAINTENANCE I: Patients receive vincristine IV on days 1, 15, 29, and 43, high dose methotrexate IV over 24 hours on days 1, 15, 29, and 43, leucovorin PO or IV on days 3-4, 17-18, 31-32, and 45-46, methotrexate IT on days 1 and 29 and mercaptopurine PO QD on days 1-14, 15-28, 29-42, and 43-56. Treatment continues for 9 weeks in the absence of disease progression or unacceptable toxicity. DELAYED INTENSIFICATION (PART I): Patients receive methotrexate IT on day 1, dexamethasone PO BID or IV on days 1-7 and 15-21, vincristine IV on days 1, 8, and 15, doxorubicin IV over 1-15 minutes or up to 1 hour on days 1, 8, and 15, and pegaspargase or calaspargase pegol IV over 1-2 hours or pegaspargase IM on day 4. Treatment (Parts I and II of Delayed Intensification) continues for 9 weeks in the absence of disease progression or unacceptable toxicity. Calaspargase pegol can only be given to patients less than 22 years of age. DELAYED INTENSIFICATION (PART II): Patients receive cyclophosphamide IV over 30-60 minutes on day 29, thioguanine PO on days 29-42, cytarabine IV over 1-30 minutes or SC on days 29-32 and 36-39, methotrexate IT on days 29 and 36, vincristine IV or IV push over 1 minute on days 43 and 50, and pegaspargase or calaspargase pegol IV over 1-2 hours or pegaspargase IM on day 43. Treatment (Parts I and II of Delayed Intensification) continues for 9 weeks in the absence of disease progression or unacceptable toxicity. Calaspargase pegol can only be given to patients less than 22 years of age. INTERIM MAINTENANCE II: Patients receive vincristine IV on days 1, 11, 21, 31, and 41, methotrexate IV or infusion over 2-15 minutes or 10-15 minutes on days 1, 11, 21, 31, and 41, methotrexate IT on days 1 and 31, and pegaspargase or calaspargase pegol IV over 1-2 hours on days 2 and 22 (pegaspargase) or (calaspargase) 23 or pegaspargase IM on days 2 and 22. Treatment continues for 8 weeks in the absence of disease progression or unacceptable toxicity. Calaspargase pegol can only be given to patients less than 22 years of age. MAINTENANCE: Patients receive vincristine IV on days 1, prednisolone PO BID or IV on days 1-5, mercaptopurine PO on days 1-84, methotrexate PO on days 8, 15, 22, 29 (excluded in cycles 1 and 2), 36, 43, 50, 57, 64, 71, and 78, and methotrexate IT on days 1 (and 29 of cycles 1-2 for patients who do not receive cranial radiation). Cycles repeat every 12 weeks for up to 2 years in the absence of disease progression or unacceptable toxicity. Patients with CNS3 disease at diagnosis undergo cranial radiation therapy for 10 fractions over 4 weeks. Patients undergo blood sample collection and bone marrow aspiration and biopsy on study. B-LLy patients undergo computed tomography (CT), magnetic resonance imaging (MRI), positron emission tomography (PET), and/or bone scan on study. After completion of study treatment, patients are followed up at 4 weeks, then every 3 months for 2 years, every 4-6 months for the third year, then every 6-12 months for years 4-5.

Vorinostat Dose-escalation After Allogeneic Hematopoietic Cell Transplantation

Children and adolescents ages 1 to 21 years of age who are undergoing allogeneic hematopoietic cell transplantation for a myeloid malignancy (AML, MDS, JMML, MPAL) will be eligible. There are no restrictions on donor type, conditioning, stem cell source, of GVHD prophylaxis approach. All participants will be treated on a single arm, and will initially receive 2 cycles of standard post-transplant azacitidine at a dose of 32mg/m2/dose IV/subcutnaeous for 5 days, in 28 day cycles. This is considered standard of care. After tolerance of 2 cycles of azacitidine has been established, patients will be assigned to receive vorinostat orally at different dose levels, depending on the stage of the study. The dose level assignments will be conducted on a standard 3+3 design, whereby dose-escalation is peformed if previous patients tolerated the dose without dose-limiting toxicities, and dose-reduction is performed if dose-limiting toxicities are seen. The starting dose will be 100mg/m2/dose on days 1-7 and 15-21 of each 28 day cycles. This will be in addition to receiving azacitidine at the fixed dose above. In order to start each cycle, participants will be required to meet specific clinical parameters to ensure safety. The dose of vorinostat between patients will be escalated or de-escalated until criteria for finding the maximum tolerated dose (MTD) is reached, and this will complete the study. Participants will continue to receive the prescribed dose of vorinostat for up to 7 cycles (9 total cycles of azacitidine). Participants are followed for dose-limiting toxicities primarily during the first two course of combined therapy (cycles 3 and 4), but are continued to be tracked until the completion of all potential combined treatment (1 year or 7 combined cycles, whichever is earlier). Principal aims: 1. To evaluate the maximum tolerated dose (MTD) of vorinostat used in combination with low-dose azacitidine after allogeneic hematopoietic cell transplantation (alloHCT) for childhood myeloid malignancies. Secondary aims: 1. To describe the dose-limiting toxicities (DLT) of the vorinostat used in combination with low-dose azacitidine. 2. To describe rates of relapse, transplant related mortality, graft-versus-host disease, and overall survival. 3. To describe the effect of epigenetic modification on lymphocyte reconstitution in the post-alloHCT setting.

Mono vs. Dual Therapy for Pediatric Pulmonary Arterial Hypertension

A Phase III, randomized, open label, pragmatic trial to compare the safety and efficacy of first-line combination therapy (sildenafil and bosentan) to first-line monotherapy (sildenafil alone) in pediatric subjects with WHO Functional Classes II or III and precapillary pulmonary hypertension of Group 1 (PAH caused by idiopathic, heritable, drugs or toxins, congenital heart disease, or connective tissue disease) or Group 3 (PAH caused by lung disease or hypoxemia) according to the WHO (Nice) classification system. Precapillary pulmonary hypertension will be defined by standard criteria as mean pulmonary artery pressure over 25 mmHg and/or pulmonary vascular resistance index (PVRI) > 3, as well as pulmonary capillary wedge pressure (or left ventricular end diastolic pressure) ≤ 15 mmHg as determined by cardiac catheterization. For infants less than one year of age for whom cardiac catheterization is not considered as part of the clinical team's recommended approach, enrollment will be possible without catheterization if the following four criteria (i-iv) are met: i. Two separate echocardiograms clearly demonstrate pulmonary hypertension by at least three of the following metrics 1. Elevated MPA pressure (early diastolic PR peak gradient >20 mmHg) 2. Right ventricular hypertrophy (qualitative as mild to severe) 3. Right atrial enlargement (scales for age will be provided) 4. Elevated right ventricular systolic pressure (>35mmHg) on at least two at least two reliable spectral Doppler envelopes during the echocardiogram and in the setting of normal for age documented systolic blood pressure at least two reliable spectral Doppler envelopes during the echocardiogram 5. Flattening or (R to L) bowing of the interventricular septum (qualitative or by elevated eccentricity index) 6. Diminished RV function (RV fractional area change <35%) and/or TAPSE below published normal range for age and weight; ii. There is no clinical or imaging evidence of left heart dysfunction; iii. Pulmonary venous stenosis and atresia are ruled out by CT angiography or MRI unless all four pulmonary veins are unequivocally normal on the two separate echocardiograms; iv. There is no evidence of hemodynamically significant left-to-right shunting across an unrestricted systemic to pulmonary shunt. Study subjects will be followed with current standard of care assessments and diagnostics, including longitudinal clinical evaluations, determinations of functional class (FC), serial NT-pro-Brain Natriuretic Peptide (NT-proBNP) levels, and echocardiography. Data from these studies will be analyzed in central core facilities that will be used by all participating study sites. Clinical endpoints are the focus of this study. However, additional data collection is planned for exploratory aims to examine the potential role for future application of novel metrics of outcomes in children with PAH (e.g., pediatric QOL and actigraphy), as described below. The investigators also plan to collect blood, swab and urine samples to determine whether inherent genomic variations or novel proteomic biomarkers will associate with clinical responsiveness to interventions within the cohort. Bio-specimens will be obtained to further test the hypothesis that therapeutic responders will have a different genomic or proteomic profile as compared to subjects who do not respond well to therapy. Bio-specimens will include the following: 1. Blood for DNA, peripheral blood mononuclear cells, plasma, and serum; and 2. Paired Box Gene (PAXgene) tubes for RNA and miRNA studies; and 3. Urine for biomarker analysis. Because sildenafil and bosentan have different mechanisms of action targeting different intracellular pathways, combination therapy is a rational treatment strategy for pediatric patients with PAH. Past work in adult PAH suggests that combination therapy with longer duration agents with the same mechanisms of action may cause greater and more sustained improvement in clinical course in comparison with monotherapy. Whether children with PAH respond and tolerate combination therapy better than monotherapy has not been studied. In addition, despite a growing experience with sequential therapy, additional medications are added only after clinical deterioration or failure to sustain responsiveness. Pharmacokinetics will be assessed during this study in order to determine whether drug levels or compliance with therapy affect outcomes in this cohort. In addition, pharmacokinetics data and related clinical responses from mono- and dual therapy participants will be compared. Interactions between these agents are well known, whereby bosentan decreases sildenafil levels. As a result, sildenafil levels during mono- and combination therapy will be further defined by the planned pharmacokinetics in the current protocol. In addition to strengthening this current study design, such data will form a basis for optimizing the use of these agents and potential strategies for dose adjustments in the broader scope of clinical care in the future.

Efficacy and Safety of M281 in Adults With Warm Autoimmune Hemolytic Anemia

The study consists of a 24-week double-blind, placebo control period, a 144-week open-label extension period and follow-up period of 8 weeks after last study drug administration. Eligible participants will be randomized to placebo or nipocalimab (2 dose levels) during the double-blind period and nipocalimab (2 dose levels) during the open-label extension period.