Abstract: The present invention relates to microRNAs (miRNAs) which are associated with cancer, particularly including hematologic malignancies, and particularly T-cell acute lymphoblastic leukemia (T-ALL), and to the assessment and modulation thereof in the treatment and management of cancer. The present invention is directed to methods and compositions for diagnosing and treating cancer, particularly T-ALL, by modulating miRNAs, and the use of miRNAs and antagonists thereof, particularly antagomirs, for predicting and assessing response to treatment, in assays for isolating and selecting antagonists, and as compositions for the treatment and management of cancer. Methods and compositions are provided for treatment or alleviation of cancer, particularly T-ALL, with antagonists/antagomirs of miRNAs, particularly one or more of miR-19b, miR-20a, miR26, miR92, miR148 and miR223.

Abstract: Whole exome sequencing of 12 tumor-normal DNA pairs, RNAseq analysis and targeted deep sequencing identified new genetic alterations in PTCL transformation. These analyses identified highly recurrent epigenetic factor mutations in TET2, DN-MT3A and IDH2 as well as a new highly prevalent RHOA p.Gly17Val (NM_001664) mutation present in 22/35 (67%) of angioimmunoblastic T-cell lymphomas (AITL) and in 8/44 (18%) not otherwise specified PTCL (PTCL NOS) samples. Mechanistically, the RHOA Gly17Val protein interferes with RHOA signaling in biochemical and cellular assays, an effect potentially mediated by the sequestration of activated Guanine Exchange Factor (GEF) proteins. In addition, new and recurrent, genetic defects are described including mutations in FYN, ATM, B2M and CD58 implicating SRC signaling, impaired DNA damage response and escape from immune surveillance mechanisms in the pathogenesis of PTCL.

Abstract: Whole exome sequencing of 12 tumor-normal DNA pairs, RNAseq analysis and targeted deep sequencing identified new genetic alterations in PTCL transformation. These analyses identified highly recurrent epigenetic factor mutations in TET2, DN-MT3A and IDH2 as well as a new highly prevalent RHOA p.Gly17Val (NM_001664) mutation present in 22/35 (67%) of angioimmunoblastic T-cell lymphomas (AITL) and in 8/44 (18%) not otherwise specified PTCL (PTCL NOS) samples. Mechanistically, the RHOA Gly17Val protein interferes with RHOA signaling in biochemical and cellular assays, an effect potentially mediated by the sequestration of activated Guanine Exchange Factor (GEF) proteins. In addition, new and recurrent, genetic defects are described including mutations in FYN, ATM, B2M and CD58 implicating SRC signaling, impaired DNA damage response and escape from immune surveillance mechanisms in the pathogenesis of PTCL.

Abstract: The present invention relates to microRNAs (miRNAs) which are associated with cancer, particularly including hematologic malignancies, and particularly T-cell acute lymphoblastic leukemia (T-ALL), and to the assessment and modulation thereof in the treatment and management of cancer. The present invention is directed to methods and compositions for diagnosing and treating cancer, particularly T-ALL, by modulating miRNAs, and the use of miRNAs and antagonists thereof, particularly antagomirs, for predicting and assessing response to treatment, in assays for isolating and selecting antagists, and as compositions for the treatment and management of cancer. Methods and compositions are provided for treatment or alleviation of cancer, particularly T-ALL, with antagonists/antagomirs of miRNAs, particularly one or more of miR-19b, miR-20a, miR26, miR92, miR148 and miR223.

Abstract: The present invention relates to compositions and methods that may be used to diagnose and treat cancer, particularly T-cell leukemia. According to one preferred embodiment of the present invention, methods are provided for determining whether reducing or blocking NOTCH-1 activation will be effective to treat, prevent, or ameliorate the effects of a cancer in a patient, including T-cell leukemia, myeloleukemia, neuroblastoma, breast cancer, and ovarian cancer. The methods generally include determining if the patient harbors one or more mutations in a PTEN coding region. In particular, the methods may be used to determine whether reducing or blocking NOTCH-1 activation, with one or more ?-secretase inhibitors, will be effective to treat, prevent, or ameliorate the effects of a cancer in a patient.