Dose Escalation Study With MK-2206 in Patients With Locally Advanced or Metastatic Solid Tumors (MK-2206-002)

DLT was any drug-related AE, regardless of grade, leading to a dose modification of MK-2206. Dose-limiting hematologic and nonhematologic toxicities were defined differently and were based on events occurring during the first cycle of study drug administration. Hematologic DLT defined as any Grade (Gr) 4 or greater hematologic toxicity except neutropenia described as follows: Neutropenia that was Gr 4 lasting for ≥7 days, or Gr 3/Gr 4 with fever >38.5°C and/or infection requiring antibiotic or anti-fungal treatment considered DLT. Gr 4 thrombocytopenia (≤25.0 x 10^9/L) was also considered DLT. Non-hematologic DLTs were defined as any Gr 3, 4, or 5 nonhematologic toxicity, with the specific exceptions of: Gr 3 nausea, vomiting, diarrhea, or dehydration occurring with inadequate supportive care and lasting <48 hours; alopecia; inadequately treated hypersensitivity reactions; and Gr 3 elevated transaminases of ≤1 week in duration. A participant could have more than one DLT.

An AE was defined as any unfavorable and unintended change in the structure, function, or chemistry of the body temporally associated with the use of the SPONSOR's product, whether or not considered related to the use of the product. Any worsening (i.e., any clinically significant adverse change in frequency and/or intensity) of a pre-existing condition which was temporally associated with the use of the SPONSOR's product, was also an AE. The number of participants that experienced one or more AEs was reported for each dose level group.

Blood samples were collected for PK analyses during the first cycle of therapy. Samples were centrifuged, plasma was withdrawn and plasma concentrations were analyzed by high performance liquid chromatography with tandem mass spectroscopy. AUC 0-48hr was calculated for Day 1 and the last day of treatment in Cycle 1 (Day 27) and reported for all dose levels receiving MK-2206 orally QOD (30, 60, 75, and 90 mg QOD).

Blood samples were collected for PK analyses during the first cycle of therapy. Samples were centrifuged, plasma was withdrawn and plasma concentrations were analyzed by high performance liquid chromatography with tandem mass spectroscopy. Cmax was calculated for Day 1 and the last day of treatment in Cycle 1 (Day 27) and reported for all dose levels receiving MK-2206 orally QOD (30, 60, 75, and 90 mg QOD).

Blood samples were collected for PK analyses during the first cycle of therapy. Samples were centrifuged, plasma was withdrawn and plasma concentrations were analyzed by high performance liquid chromatography with tandem mass spectroscopy. C48hr was calculated for Day 1 and the last day of treatment in Cycle 1 (Day 27) and reported for all dose levels receiving MK-2206 orally QOD (30, 60, 75, and 90 mg QOD).

Blood samples were collected for PK analyses during the first cycle of therapy. Samples were centrifuged, plasma was withdrawn and plasma concentrations were analyzed by high performance liquid chromatography with tandem mass spectroscopy. Tmax was calculated for Day 1 and the last day of treatment in Cycle 1 and reported for all dose levels receiving MK-2206 orally QOD (30, 60, 75, and 90 mg QOD).

Blood samples were collected for PK analyses on Day 27 of the first cycle of therapy. Samples were centrifuged, plasma was withdrawn and plasma concentrations were analyzed by high performance liquid chromatography with tandem mass spectroscopy. t½ (Harmonic mean ± pseudo SD) was calculated and reported for all dose levels receiving MK-2206 orally QOD (30, 60, 75, and 90 mg QOD).

Blood samples were collected for PK analyses during the first cycle of therapy. Samples were centrifuged, plasma was withdrawn and plasma concentrations were analyzed by high performance liquid chromatography with tandem mass spectroscopy. AUC 0-168 was calculated for Day 1 and the last day of treatment in Cycle 1 and reported for all dose levels receiving MK-2206 orally QW (90, 135, 200, 300, 250, and 150 mg QW).

Blood samples were collected for PK analyses during the first cycle of therapy. Samples were centrifuged, plasma was withdrawn and plasma concentrations were analyzed by high performance liquid chromatography with tandem mass spectroscopy. Cmax was calculated for Day 1 and the last day of treatment in Cycle 1 and reported for all dose levels receiving MK-2206 orally QW (90, 135, 200, 300, 250, and 150 mg QW).

Blood samples were collected for PK analyses during the first cycle of therapy. Samples were centrifuged, plasma was withdrawn and plasma concentrations were analyzed by high performance liquid chromatography with tandem mass spectroscopy. C48hr was calculated for Day 1 and the last day of treatment in Cycle 1 and reported for all dose levels receiving MK-2206 orally QW (90, 135, 200, 300, 250, and 150 mg QW).

Blood samples were collected for PK analyses during the first cycle of therapy. Samples were centrifuged, plasma was withdrawn and plasma concentrations were analyzed by high performance liquid chromatography with tandem mass spectroscopy. Tmax was calculated for Day 1 and the last day of treatment in Cycle 1 and reported for all dose levels receiving MK-2206 orally QW (90, 135, 200, 300, 250, and 150 mg QW).

Blood samples were collected for PK analyses during the first cycle of therapy. Samples were centrifuged, plasma was withdrawn and plasma concentrations were analyzed by high performance liquid chromatography with tandem mass spectroscopy. t½ (Harmonic mean ± pseudo SD) was calculated for the last day of treatment in Cycle 1 and reported for all dose levels receiving MK-2206 orally QW (90, 135, 200, 300, 250, and 150 mg QW).

To determine the inhibition of pAkt by MK-2206 in participants treated at the MTD, levels of Akt phosphorylated at the serine 473 residue (pAkt Ser473 Akt) were measured in snap-frozen tumors collected at baseline and Day 15 of Cycle 1 using a MesoScale enzyme-linked immunosorbent assay (ELISA). Per protocol, pAkt levels were determined only for the MK-2206 MTD (60 mg QOD) group.

Overall tumor response was assessed during the study by diagnostic anatomic imaging using RECIST. The number of participants with a confirmed Complete Response (CR: Disappearance of all target lesions) as per RECIST was reported for each dose level group.