Trial Outcomes & Findings for A Multi-Center, Open-Label Study of Fruquintinib in Solid Tumors and Colorectal, and Breast Cancers (NCT NCT03251378)

The study was conducted at 9 study sites in the United States.

A total of 129 participants (14 in Dose Escalation Phase and 115 in Dose Expansion Phase) were treated in this study.

A Multi-Center, Open-Label Study of Fruquintinib in Solid Tumors and Colorectal, and Breast Cancers

Dose-limiting toxicity was defined as: Any Grade 4 non-hematologic toxicity; Any Grade 3 non-hematologic toxicity related to study drug except for nausea/vomiting, diarrhea, constipation, hypertension, and electrolyte imbalances downgraded within 3-days with appropriate supportive treatment; Grade 4 neutropenia lasting \>3 days; Grade 3 febrile neutropenia (absolute neutrophil count \[ANC\] \<1.0\*10\^9 per liter \[/L\] with a single temperature of greater than (\>) 38.3 degree centigrade (°C) or a sustained temperature of greater than or equal to (\>=) 38°C for more than 1 hour); Grade 4 thrombocytopenia or Grade 3 thrombocytopenia associated with bleeding; Dose interruption for \>14 days due to toxicity.

TEAEs were defined as AEs that started or worsened in severity on or after the first dose of study medication and no later than 37 days after the date of last study treatment. A serious adverse event (SAE) was any AE that had any of the following characteristics: Fatal (that was, the AE actually caused or led to death, except for deaths caused by the progress of disease); Life threatening (that was, AE, in view of the investigator, places participant at immediate risk of death); Required or prolonged inpatient hospitalization (excluding emergency or outpatient treatment); Resulted in persistent or significant disability/incapacity (that was, the AE resulted in substantial disruption of the participant's ability to conduct normal life functions).

PFS was defined as time from date of first dosing until date of an objective disease progression (PD) as defined by Response Evaluation Criteria in Solid Tumors (RECIST) Version (v) 1.1 or death due to any cause, whichever comes first. PFS was determined using all data until last evaluable visit prior to or on date of: (i) radiographic PD per RECIST v1.1; (ii) withdrawal of consent to obtain additional scans on study; or (iii) initiation of subsequent anticancer therapy other than study drugs, whichever was earlier. PFS rate was defined as probability of being disease progression free at selected timepoints such as 16 weeks and was calculated using Brookmeyer-Crowley method based on PFS events observed up to 29 months. PD:at least 20 percent (%) increase in sum of diameters of target lesions, taking as reference smallest sum on study, including baseline; an absolute increase of at least 5 millimeter (mm) in sum of diameters of target lesions; and appearance of one or more new lesions.

Cmax of fruquintinib was reported.

Tmax of fruquintinib over a dosing intervals were reported.

Cmin of fruquintinib was reported.

Tmin of fruquintinib was reported.

AUC0-24 of fruquintinib was reported.

CL/Fss was calculated as Dose/AUC0-t. As planned, CL/Fss was assessed at Cycle 1 Days 14 and 21 after multiple dose administration in Dose Escalation Phase and Cohort A of Dose Expansion Phase; and at Cycle 1 Day 14 for Cohort B, C, D, E of Expansion Phase.

Accumulation ratio based on Cmax for Cycle 1 Day 14 was calculated as Day 14 Cmax /Day 1 Cmax and for Cycle 1 Day 21 was calculated as Day 21 Cmax /Day 1 Cmax. Accumulation ratio based on Cmax of fruquintinib was reported.

Accumulation ratio for Cycle 1 Day 14 was calculated as AUC0-24 at Day 14 divided by AUC0-24h at Day 1, and for Cycle 1 Day 21 was calculated as AUC0-24 at Day 21 divided by AUC0-24 at Day 1. Accumulation ratio based on AUC0-24 of fruquintinib was reported.

ORR was defined as the percentage of participants with objective complete response (CR) or partial response (PR) response per RECIST version 1.1. As per RECIST 1.1; CR was defined as disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to \<10 mm. PR was defined at least a 30 percent (%) decrease in the sum of diameters of target lesions, taking as reference the baseline sum of diameters.

DCR was defined as the percentage of participants with a best overall response (BOR) of confirmed CR, confirmed PR or stable disease (SD) (for 7 weeks) per RECIST version 1.1. As per RECIST 1.1; CR was defined as disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to \<10 mm. PR was defined at least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum of diameters. SD was defined as neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for progressive disease (PD defined as at least a 20% increase in the sum of diameters of target lesions, taking as reference the smallest sum on study \[this might include the baseline sum\]).

DoR was defined as the time (in months) from the date of the first objective response (CR or PR) until the date of the documented progression or of death, whichever comes first. DoR was only analyzed for participants whose best overall response (BOR) was either CR or PR. As per RECIST 1.1; CR was defined as disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to \<10 mm. PR was defined at least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum of diameters. PD was defined as at least a 20% increase in the sum of diameters of target lesions, taking as reference the smallest sum on study (this might include the baseline sum). DoR was calculated using the Kaplan-Meier method.

PFS was defined as the time (in months) from date of first dosing until the date of an objective disease progression as per RECIST version 1.1 or death due to any cause, whichever comes first. PFS was determined using all the assessment data up until the last evaluable visit prior to or on the date of (i) disease progression as defined by RECIST version 1.1 or death; or (ii) withdrawal of consent; or (iii) receiving subsequent anti-cancer therapy, whichever is earlier. Disease progression was defined as at least a 20% increase in the sum of diameters of target lesions, taking as reference the smallest sum on study (this might include the baseline sum). PFS was calculated using the Kaplan-Meier method.

OS was defined as the time interval (in months) between the first dose date and the date of death (any cause). OS was calculated using the Kaplan-Meier method.

Tumor size was estimated using data on sum of diameters of target lesion. Percentage change in tumor size from baseline was determined for participants with measurable disease at baseline and derived by the percentage change in the sum of the diameters of target lesions (TLs) compared to baseline. Baseline was defined as the last evaluable tumor assessment result obtained prior to the first administration of study medication.

TEAEs were defined as AEs that started or worsened in severity on or after the first dose of study medication and no later than 37 days after the date of last study treatment. A SAE was any AE that had any of the following characteristics: Fatal (that was, the AE actually caused or led to death, except for deaths caused by the progress of disease); Life threatening (that was, AE, in view of the investigator, places participant at immediate risk of death); Required or prolonged inpatient hospitalization (excluding emergency or outpatient treatment); Resulted in persistent or significant disability/incapacity (that was, the AE resulted in substantial disruption of the participant's ability to conduct normal life functions).