This phase II trial studies how well selumetinib sulfate works in treating patients with pancreatic cancer with Kirsten rat sarcoma (KRAS) G12R mutations that has spread from where it started to nearby tissue or lymph nodes or other places in the body. Selumetinib sulfate may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth.
PRIMARY OBJECTIVES: I. Determine the objective response rate to selumetinib sulfate (selumetinib) administered as 75 mg orally twice daily on a continuous schedule in patients with advanced pancreas cancer harboring Kirsten rat sarcoma (KRAS) G12R mutations. SECONDARY OBJECTIVES: I. To determine the progression free survival of patients with locally advanced, unresectable and stage IV pancreas cancer treated with selumetinib monotherapy. II. To evaluate the safety of selumetinib in patients with advanced pancreas cancer. III. To determine the impact of additional genetic alterations on the response to selumetinib in pancreas cancer harboring KRAS G12R mutations. IV. To develop a clinically applicable biomarker predicting response to selumetinib in pancreas cancer harboring KRAS G12R mutations. OUTLINE: Patients receive selumetinib sulfate orally (PO) twice daily (BID). Treatment repeats every 28 days for up to 27 courses in the absence of disease progression or unacceptable toxicity. After completion of study treatment, patients are followed up every 2 months for 52 weeks.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
TREATMENT
Masking
NONE
Enrollment
8
Correlative studies
Given by mouth (PO)
Los Angeles County-USC Medical Center
Los Angeles, California, United States
USC / Norris Comprehensive Cancer Center
Los Angeles, California, United States
University of California Davis Comprehensive Cancer Center
Sacramento, California, United States
University of Kentucky/Markey Cancer Center
Lexington, Kentucky, United States
NCI - Center for Cancer Research
Bethesda, Maryland, United States
Wayne State University/Karmanos Cancer Institute
Detroit, Michigan, United States
Duke University Medical Center
Durham, North Carolina, United States
Ohio State University Comprehensive Cancer Center
Columbus, Ohio, United States
University of Pittsburgh Cancer Institute (UPCI)
Pittsburgh, Pennsylvania, United States
Proportion of Participants With an Objective Response (Partial Response + Complete Response)
Response was assessed by the Response Evaluation Criteria in Solid Tumors (RECIST) v1.1. Complete Response (CR) is disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to \<10mm (\<1 cm). Partial Response (PR) is at least a 30% decrease in the sum of the diameters of target lesions, taking as reference the baseline sum diameters.
Time frame: Approximately 1-8.2 months
Median Progression-free Survival (PFS)
PFS is defined as the duration of time from start of treatment to time of progression or death, whichever occurs first and was calculated using the Kaplan-Meier method.
Time frame: From start of treatment to time of progression or death, whichever occurs first, assessed up to 52 weeks
Incidence of Grade 3 or Greater Adverse Events Using the National Cancer Institute Common Terminology Criteria for Adverse Events (CTCAE) Version 5.0 Probably or Definitely Attributable to the Agent Selumetinib
Here are the grade 3 or greater adverse events assessed by the CTCAEv5.0 probably or definitely attributable to the agent Selumetinib. Grade 3 is defined as severe or medically significant, Grade 4 is life-threatening consequences, and Grade 5 is death related to adverse event. Probably is defined as likely related to the agent, and Definitely is defined as clearly related to the agent.
Time frame: Date treatment consent signed to date off study, approximately 25 months and 6 days.
Number of Participants With Serious and Non-serious Adverse Events Assessed by the Common Terminology Criteria for Adverse Events (CTCAE v5.0).
Here is the number of participants with serious and non-serious adverse events assessed by the Common Terminology Criteria for Adverse Events (CTCAE v5.0). A non-serious adverse event is any untoward medical occurrence. A serious adverse event is an adverse event or suspected adverse reaction that results in death, a life-threatening adverse drug experience, hospitalization, disruption of the ability to conduct normal life functions, congenital anomaly/birth defect or important medical events that jeopardize the patient or subject and may require medical or surgical intervention to prevent one of the previous outcomes mentioned.
Time frame: Date treatment consent signed to date off study, approximately 25 months and 6 days.
Semi-quantitative Measurements of Connector Enhancer of the Kinase Suppressor of Ras-1 (CNKSR1)
Comparisons will be done to estimate the differences of the expression level in pancreas cancer tissues and clinical outcome variables.
Time frame: Up to 52 weeks
Predictive Biomarkers for Response to Selumetinib
Presence of variants identified in the 50-cancer gene panel will be compared with response, presenting the results in a 2x2 table with findings reported descriptively. Pre-treatment ctDNA levels will be divided into groups to separate aberrant values from the rest. The cutoffs will be \> and \< 2 standard deviations of the mean, with the cutoffs applied to both ctDNA levels. Based on these groups, resulting in participants with cell free deoxyribonucleic acid (cfDNA) transcripts levels \> 2 standard deviation (SD) above the mean, participants with cfDNA transcripts levels \< 2 SD below the mean, and the rest in between, the categorical results will be evaluated and reported relative to response vs. non-response in a descriptive manner.
Time frame: Up to 52 weeks
Longitudinal Biomarker Measuring Response to Treatment
Circulating free deoxyribonucleic acid (cfDNA) transcript levels will be followed from the start of treatment every (q)2 weeks and the change to pre-treatment will be plotted for each timepoint in a spider plot format. Variant profile derived from voluntary repeat biopsies will be compared to pre-treatment variant profile and gain of variants (adjusted for similar sequencing depth) will be recorded.
Time frame: start of treatment every (q)2 weeks, up to 52 weeks
Change in the Somatic Circulating Tumor Deoxyribonucleic Acid (ctDNA) Mutation Profile and Its Correlation With Clinical Outcome
The presence of mutant DNA copies and the fractional abundance of the mutant KRAS allele on circulating tumor DNA (ctDNA) in cell-free (cf) DNA isolated from plasma samples were to be determined.
Time frame: Baseline up to 52 weeks
Mean Copy Number KRAS Wild Type Allele in Circulating Tumor DNA (ctDNA)
ctDNA copy number measurements of KRAS wild type alleles in circulating tumor DNA (ctDNA) from cell-free (cf) DNA isolated from plasma samples was determined from baseline and the last KRAS value (as a single value) before the participant came off treatment.
Time frame: Baseline and the last KRAS value before the participant came off treatment, approximately 1- 8.2 months.
Overall Percentage Change (%) of Copies KRAS Wild Type Allele
Overall ctDNA copy number measurements of KRAS wild type alleles in circulating tumor DNA (ctDNA) from cell-free (cf) DNA isolated from plasma samples determined from a single percentage change for the group rather than a percentage change for each participant at baseline and last recorded value while on-treatment.
Time frame: Approximately 1- 8.2 months.
Mean Copy Number KRAS Mutant Type Allele in Circulating Tumor DNA (ctDNA)
Mean ctDNA copy number measurements of KRAS mutant alleles in circulating tumor DNA (ctDNA) from cell-free (cf) DNA isolated from plasma samples was determined at baseline and the last recorded value while on treatment.
Time frame: Baseline and last recorded value while on treatment, approximately 1- 8.2 months.
Overall Percentage Change of Copies KRAS Mutant Type Allele
Overall ctDNA copy number measurements of KRAS mutant alleles in circulating tumor DNA (ctDNA) from cell-free (cf) DNA isolated from plasma samples determined from a single percentage change for the group rather than a percentage change for each participant at baseline and last recorded value while on-treatment.
Time frame: Approximately 1- 8.2 months.
Percentage of KRAS Allele in Circulating Tumor DNA (ctDNA) That is Identified as Variant From Cell-free (cf) DNA
This outcome measure is reporting the overall percentage of KRAS allele in circulating tumor DNA (ctDNA) that is identified as variant from cell-free (cf) DNA isolated from plasma samples between baseline and on-treatment.
Time frame: Between baseline and last recorded value while on-treatment, approximately 1- 8.2 months.
Overall Any Percent Change in (VAF, %), of KRAS Allele in Circulating Tumor Deoxyribonucleic Acid (ctDNA)
Overall change in Variant Allele Fraction (VAF, %) of KRAS allele in circulating tumor DNA (ctDNA) from cell-free (cf) DNA isolated from plasma samples determined from a single percentage change for the group rather than a percentage change for each participant between baseline and last recorded value while on-treatment
Time frame: Approximately 1- 8.2 months.
Mean Change in Variant Allele Fraction (VAF, %) of KRAS in Participants Who Had No Measurable KRAS Mutant Circulating Tumor Deoxyribonucleic Acid (ctDNA) at Baseline
Any change in Variant Allele Fraction (VAF, %) of KRAS allele in circulating tumor DNA (ctDNA) from cell-free (cf) DNA isolated from plasma samples determined from a single percentage change for the group rather than a percentage change for each participant between baseline and while on-treatment in patients with no Mutant Fractional KRAS Abundency at baseline (VAF %, KRAS allele at baseline = 0% ).
Time frame: Baseline and last recorded value while on-treatment, approximately 1- 8.2 months.
Overall Percent Change in Variant Allele Fraction (VAF, %) of KRAS in Participants Who Had No Measurable KRAS Mutant Circulating Tumor Deoxyribonucleic Acid (ctDNA) at Baseline
Overall change in Variant Allele Fraction (VAF, %) of KRAS allele in circulating tumor DNA (ctDNA) from cell-free (cf) DNA isolated from plasma samples determined from a single percentage change for the group rather than a percentage change for each participant between baseline and while on-treatment in patients with no Mutant Fractional KRAS Abundency at baseline (VAF %, KRAS allele at baseline = 0% ).
Time frame: Approximately 1- 8.2 months.
Percentage Change of KRAS Allele in Circulating Tumor Deoxyribonucleic Acid (ctDNA) That is Identified as Variant From Cell-free (cf) DNA at Baseline and After Treatment
This outcome measure is reporting the percentage of KRAS allele in circulating tumor DNA (ctDNA) that is identified as variant from cell-free (cf) DNA isolated from plasma samples determined from a single percentage change for the group rather than a percentage change for each participant between baseline and last recorded value after treatment in patients with detectable KRAS Mutant Circulating Tumor Deoxyribonucleic Acid (ctDNA) (Mutant Fractional KRAS Abundency at baseline and after treatment (VAF %), KRAS allele at baseline \> 0%).
Time frame: Baseline and last recorded value after treatment, approximately 1- 8.2 months.
Overall Percent Change in Variant Allele Fraction (VAF, %) of KRAS in Participants With Detectable KRAS Mutant Circulating Tumor Deoxyribonucleic Acid (ctDNA) at Baseline and After Treatment
Overall change in Variant Allele Fraction (VAF, %) of KRAS allele in circulating tumor DNA (ctDNA) from cell-free (cf) DNA isolated from plasma samples determined from a single percentage change for the group rather than a percentage change for each participant with detectable KRAS Mutant Circulating Tumor Deoxyribonucleic Acid (ctDNA) between baseline and last recorded value after treatment.
Time frame: Approximately 1- 8.2 months.
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