Gender
All
Age Group
18 Years and up
Accepting Healthy Volunteers
No
Key Inclusion Criteria
Patient has ECOG performance status of 0-1
One or more documented primary oncogenic PIK3CA mutation(s) in blood and/or tumor per local
assessment
- Other potentially oncogenic PIK3CA mutations may be considered but must be approved by
the Sponsor prior to enrollment.
Part 1 - Ability to provide archived tumor tissue or be willing to undergo pretreatment
tumor biopsy to assess PIK3CA status retrospectively Part 2 - Submit tumor tissue prior to
study drug initiation for determination of PIK3CA mutation retrospectively.
Key Inclusion for RLY-2608 Single Agent Arm
- [For Part 1]: Evaluable disease per RECIST v1.1
- [For Part 2]: Measurable disease per RECIST v1.1
- Disease that is refractory to standard therapy, intolerant to standard therapy, or has
declined standard therapy.
- Part 1- histologically or cytologically confirmed diagnosis of unresectable or
metastatic solid tumor
- Part 2 - Unresectable or metastatic solid tumor with PIK3CA mutation(s) and one of the
following tumor types:
Group 1: clear cell ovarian cancer Group 2: head and neck squamous cell carcinoma Group 3:
cervical cancer Group 4: other solid tumors, excluding colorectal, clear cell ovarian, head
and neck squamous cell, and cervical cancers Group 5: unresectable or metastatic solid
tumors with PIK3CA double mutations
Key Inclusion for Combination Arms
- [For Part 1 and Part 2]: Evaluable disease per RECIST v1.1
- Male or female with histologically or cytologically confirmed diagnosis of HR+, HER2-
unresectable or metastatic breast cancer that is not amenable to curative therapy.
Females may be postmenopausal, premenopausal, or perimenopausal. Premenopausal or
perimenopausal females must have a histologically or cytologically confirmed diagnosis
of HR+ HER2- advanced or metastatic breast cancer that is not amenable to curative
therapy and must have been previously treated with GnRH agonist at least 4 weeks prior
to start of study drug
- [For Part 1 and Part 2]: Had previous treatment for advanced or metastatic breast
cancer with:
1. ≤1 line of chemotherapy,
2. ≥1 cyclin-dependent kinases (CDK) 4/6 inhibitor, and
3. ≥1 antiestrogen therapy including, but not limited to, selective
estrogen-receptor degraders (eg, fulvestrant), selective estrogen receptor
modulators (eg, tamoxifen), and aromatase inhibitors (AI) (letrozole,
anastrozole, exemestane), and
4. ≥1 PARP inhibitor, if appropriate, if documented germline BRCA1/2 mutation Note:
Systemic local, loco-regional, or adjuvant treatment is not to be included in
enumeration or previous treatment
[For RLY-2608 + fulvestrant arm; Part 2, Group 2]: Received prior treatment with a PI3Kα
inhibitor and discontinued the inhibitor due to intolerance and not disease progression,
where intolerance is defined as treatment discontinuation due to treatment related AE (eg.
hyperglycemia, rash, diarrhea, stomatitis) other than severe hypersensitivity reaction
and/or life-threatening reactions, such as anaphylaxis and Stevens-Johnson syndrome.
Key Exclusion Criteria
Prior treatment with PI3Kα, AKT, or mTOR inhibitors (except for RLY-2608 + fulvestrant arm,
Part 2, Group 2).
Type 1 or Type 2 diabetes requiring antihyperglycemic medication, or fasting plasma glucose
≥140 mg/dL and glycosylated hemoglobin (HbA1c) ≥7.0%.
History of hypersensitivity to PI3K inhibitors. For combination arms only: hypersensitivity
to fulvestrant, palbociclib, and/or ribociclib, as appropriate for the combination.
For triple combination arms only: history of pneumonitis or interstitial lung disease.
For the single agent and combination arms other than with ribociclib: mean QT interval
corrected using Fridericia's formula (QTcF) >480 msec. For the combination arms with
ribociclib: mean QTcF ≥450 msec.
Patient has a history of prolonged QT syndrome or torsades de pointes. Patient has a
familial history of prolonged QT syndrome.
Clinically significant, uncontrolled cardiovascular disease CNS metastases or primary CNS
tumor that is associated with progressive neurologic symptoms