Entries by Renee Hansen

Ferraris et al., “Design, Synthesis, and Pharmacological Evaluation of Fluorinated Tetrahydrouridine Derivatives as Inhibitors of Cytidine Deaminase.” Journal of Medicinal Chemistry, 2014

Abstract: Several 2′-fluorinated tetrahydrouridine derivatives were synthesized as inhibitors of cytidine deaminase (CDA). (4R)-2′-Deoxy-2′,2′-difluoro-3,4,5,6-tetrahydrouridine (7a) showed enhanced acid stability over tetrahydrouridine (THU) 5 at its N-glycosyl bond. As a result, compound 7a showed an improved oral pharmacokinetic profile with a higher and more reproducible plasma exposure in rhesus monkeys compared to 5. Co-administration of 7a […]

Astex Pharmaceuticals and Otsuka announce results of the phase 3 ASTRAL-1 study of guadecitabine (SGI-110) in treatment-naïve AML patients ineligible to receive intense induction chemotherapy

Astex Pharmaceuticals and Otsuka announce results of the phase 3 ASTRAL-1 study of guadecitabine (SGI-110) in treatment-naïve AML patients ineligible to receive intense induction chemotherapy Guadecitabine did not meet the co-primary endpoints of complete response (CR) rate or overall survival (OS) in the ASTRAL-1 study Astex continues to focus on completing the phase 3 ASTRAL-2 and […]

2018 AACR: Development of a potent class of small molecule inhibitors of the MDM2-p53 protein-protein interaction

Summary In response to cellular stress, the p53 tumor suppressor is activated to modulate cell cycle progression, DNA repair, and cell death. The activity of p53 is tightly regulated by MDM2, an E3 ubiquitin ligase that targets p53 for proteasomal degradation. Inhibition of the MDM2-p53 interaction in tumors carrying wild-type p53 can therefore reactivate p53 […]

2018 AACR: A novel ERK1/2 inhibitor has potent activity in KRAS-mutant non-small cell lung cancer models

Summary Non-small cell lung cancer (NSCLC) molecular profiling is a key factor in treatment selection. Although, patients with NSCLC tumors harboring EGFR or ALK mutations can benefit from personalized therapies, there are currently no approved targeted therapies for KRAS mutant tumors which occur in 25% to 30% of patients with NSCLC. The constitutive activation of […]

2017 ASH: Predictors of Response and Survival in 206 AML Patients Treated with Guadecitabine in a Phase 2 Study

Summary Background: Guadecitabine is a next generation hypomethylating agent (HMA) resistant to degradation by cytidine deaminase which results in prolonged in vivo exposure to the active metabolite decitabine. We conducted a prospective phase 2 study testing different schedules of guadecitabine in 206 AML patients. We present here the results of multiple logistic regression, and Cox […]

2017 ASH: A Phase 2 Dose-Confirmation Study of Oral ASTX727, a Combination of Oral Decitabine with a Cytidine Deaminase Inhibitor (CDAi) Cedazuridine (E7727), in Subjects with Myelodysplastic Syndromes (MDS)

Summary An oral hypomethylating agent which could be administered at a dose which would emulate parenteral pharmacokinetics would be more convenient and potentially enhance adherence to treatment. Heretofore, rapid clearance by cytidine deaminase (CDA) during first pass has prevented good oral bioavailability for decitabine (DAC). Cedazuridine (E7727), a novel CDAi, is orally bioavailable with a […]

2017 EORTC: Phase 1 study of the IAP inhibitor ASTX660 in adults with advanced cancers and lymphomas

Summary Due to their roles in the evasion of apoptosis, Inhibitor of Apoptosis Proteins (IAPs) are considered attractive targets for anti-cancer therapy. ASTX660 is a potent, next generation, non-peptidomimetic, dual antagonist of both XIAP and cIAP1, discovered using fragment-based drug design (1-3). We report here the results of the first-in-human phase 1 dose escalation and […]

2017 ESH-AML: LINE-1 and P15 Demethylation May Predict Response to Guadecitabine

Summary Guadecitabine (formerly known as SGI-110) is a next-generation hypomethylating agent (HMA) composed of a dinucleotide of decitabine and deoxyguanosine (Figure 1). Guadecitabine is a dinucleotide resistant to degradation by cytidine deaminase (CDA) resulting in longer in vivo exposure to its active metabolite, decitabine, after a small volume ( ~ 1 mL) subcutaneous (SC) administration. […]

2017 ACCP: Population Pharmacokinetics Analysis for Guadecitabine (SGI-110) and Decitabine after Subcutaneous Dosing with SGI-110 in Patients with Relapsed/Refractory AML and MDS

Summary Guadecitabine is next-generation HMA formulated as a dinucleotide of decitabine and deoxyguanosine delivered as a low volume and pharmaceutically stable subcutaneous (SC) injection. In vivo conversion to active metabolite decitabine results in longer effective half-life and more extended decitabine exposure window than decitabine IV infusion. The differentiated PK profile may lead to improved biological […]

2017 EHA: DOSE-CONFIRMATION STUDY OF ORAL ASTX727, A COMBINATION OF ORAL DECITABINE WITH A CYTIDINE DEAMINASE INHIBITOR (CDAI) E7727, IN SUBJECTS WITH MYELODYSPLASTIC SYNDROMES (MDS): PRELIMINARY RESULTS

Summary An oral hypomethylatingagent which could be administered in a dose which would emulate parenteral pharmacokinetics would be more convenient and potentially enhance adherence to treatment. Heretofore, rapid clearance by cytidine deaminase (CDA) during first pass has prevented oral administration.1E7727, a novel CDAi, is orally bioavailable with a large safety margin and reproducible effectiveness in […]