Neoplasms

Skin and Connective Tissue Diseases

All Conditions

Breast Neoplasms

Breast Diseases

Skin Diseases

Antineoplastic Agents

All Drugs and Chemicals

Amino Acids

Lapatinib

Tyrosine Kinase Inhibitors

Protein Kinase Inhibitors

Enzyme Inhibitors

Tyrosine

GSK Clinical Trials

This phase II study will evaluate and compare the efficacy and tolerability of two dose schedules (1500 mg QD and 500 mg BID) of oral Lapatinib as treatment for patients with advanced or metastatic breast cancer.

Lapatinib In Chemotherapy-Naive Or Metastatic Breast Cancer

A Phase II, Open-Label, Randomized, Parallel-Group Multicenter Trial Comparing Two Schedules of GW572016 as First-Line Monotherapy in Patients With Advanced or Metastatic Breast Cancer

OR is defined as the number of participants achieving either a confirmed CR or PR, per Response Evaluation Criteria in Solid Tumors (RECIST, v 1.0). Best OR is defined as the best response recorded from the start of treatment until progressive disease (PD)/recurrence. CR is defined as the disappearance of all target lesions (TLs) and non-TLs. PR is defined as at least a 30% decrease in the sum of the longest diameters (LD) of TLs, taking as a reference the Baseline sum LD and no PD, or complete resolution of TLs and the persistence of one or more non-TL(s), as assessed by the IRC. PD is defined as at least a 20% increase in the sum of the LD of TLs, taking as a reference the smallest sum LD recorded since the treatment started or the appearance of \>= 1 new lesions or unequivocal progression of existing non-TLs. Responses were confirmed at subsequent assessments made \>=28 days after the original response. Participants with an unknown or missing response are treated as non-responders.

Clinical benefit is defined as the numer of participants achieving either a confirmed CR (disappearance of all target lesions (TLs) and non-TLs) or PR (at least a 30% decrease in the sum of the longest diameters (LD) of TLs, taking as a reference the Baseline sum LD and no PD,or complete resolution of TLs and the persistence of one or more non-TLs)or SD (neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for progressive disease \[at least a 20% increase in the sum of the LD of target lesions, taking as a reference, the smallest sum LD recorded since the treatment started or the appearance of 1 or more new TLs or non-TLs and/or unequivocal progressionn of existing non-target lesions\], taking as reference, the smallest sum LD since the treatment started) for at least 24 weeks. This was based on confirmed responses from the investigator assessment of clinical benefit.

Time to response is defined as the time from randomization until the first documented evidence of a PR or CR (whichever status is recorded first). Analysis was based on responses confirmed at a repeat assessment made at least 4 weeks after the initial response, with the time to response taken as the first time the response was observed, not the confirmation assessment. Participants who withdraw with no tumor response were censored at the date of withdrawal from the study. CR is defined as the disappearance of all TLs and non-TLs. PR is defined as at least a 30% decrease in the sum of the longest diameter (LD) of TLs, taking as a reference the Baseline sum LD and no PD, or complete resolution of TLs and the persistence of one or more non-TL(s). PD is defined as at least a 20% increase in the sum of the LD of TLs, taking as a reference the smallest sum LD recorded since the treatment started or the appearance of one or more new lesions or unequivocal progression of existing non-TLs.

DoR is defined for the subset of par. who had a confirmed CR (disappearance of all target lesions (TLs) and non-TLs) or PR (at least a 30% decrease in the sum of the longest diameters (LD) of TLs, taking as a reference the Baseline sum LD and no PD, or complete resolution of TLs and the persistence of \>= 1 non-TL\[s\]) as the time from the first documented evidence of a CR or PR until the first documentation of radiological PD or death due to breast cancer, if sooner. PD is defined as \>=20% increase in the sum of the LD of TLs, taking as a reference the smallest sum LD recorded since the treatment started or the appearance of \>= 1 new lesions or unequivocal progression of existing non-TLs. For par. who did not progress or die, DoR was censored on the date of the last radiological scan. If a par.had only a Baseline visit or did not have a date of a radiological scan that was later than the date of initiation of anti-cancer therapy, DoR was censored at the start date of treatment.

Progression-free survival is defined as the time from randomization until the earliest date of disease progression or death due to any cause, if sooner. Disease progression was based on the IRC's and investigator's assessments of the objective evidence (e.g., radiological scans and medical photographs). For participants who did not progress, or die, progression-free survival was censored at the time of the last IRC assessed radiological scan.

Time to treatment failure is calculated as the interval between the date of randomization and the occurrence of local tumor progression (including ipsilateral \[on the same side\] and controlateral breast tumor progression), distant tumor progression, permanent treatment discontinuation (either for the experimental or conventional treatment arm), or death due any cause. For participants who did not progress, die or discontinue early, time to treatment failure was censored at the last scan date.

An AE is defined as any untoward medical occurrence in a participant, temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. An SAE is defined as any untoward medical occurrence that, at any dose, results in death, is life-threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, or is a congenital anomaly/birth defect. Medical or scientific judgment was exercised in deciding whether reporting was appropriate in other situations. Refer to the general AE/SAE module for a list of non-serious AEs and SAEs.

GlaxoSmithKline

SAEs and non-serious AEs were collected in members of the Safety Population, comprised of all randomized participants who received at least one dose of investigational product , according to the actual treatment received.

Participants received lapatinib 1500 mg orally QD. Treatment was continued for 12 weeks or until disease progression or withdrawal from treatment for another reason. After Week 12, participants with clinical benefit had the option to continue with the lapatinib therapy at the same dose and schedule, until disease progression, provided the treatment was tolerated.

Lapatinib 1500 mg QD

Participants received lapatinib 500 mg orally BID. Treatment was continued for 12 weeks or until disease progression or withdrawal from treatment for another reason. After Week 12, participants with clinical benefit had the option to continue with the lapatinib therapy at the same dose and schedule, until disease progression, provided the treatment was tolerated.

Lapatinib 500 mg BID

Total

Age, Continuous

Gender

White

Black

Asian

American Hispanic

Race/Ethnicity, Customized

GSK Response Center

Intent-to-Treat (ITT) Population: all randomized participants who received at least one dose of investigational product.

Number of Participants With a Best Overall Response (OR) of Confirmed Complete Response (CR) or Partial Response (PR), as Assessed by the Independent Review Committee (IRC)

Number of Participants With a Best Overall Response (OR) of Confirmed Complete Response (CR) or Partial Response (PR), as Assessed by the Investigator

Investigator

Participants received lapatinib 1500 mg orally QD. Treatment was continued for 12 weeks or until disease progression or withdrawal from treatment for another reason. After Week 12, participants with clinical benefit had the option to continue with the lapatinib therapy at the same dose and schedule, until disease progression, provided the treatment was tolerated.Participants received lapatinib 1500 mg orally QD. Treatment was continued for 12 weeks or until disease progression or withdrawal from treatment for another reason. After Week 12, participants with clinical benefit had the option to continue with the lapatinib therapy at the same dose and schedule, until disease progression, provided the treatment was tolerated.

Percentage of Participants With Clinical Benefit (CR or PR or Stable Disease [SD] for at Least 24 Weeks), as Assessed by the IRC and Investigator

IRC, n=15, 18

Investigator, n=17, 22

ITT Population. Only those participants with CR or PR were analyzed (represented by n=X in the category titles). Different participants may have been analyzed by the IRC and the Investigator, so the overall number of participants analyzed reflects everyone in the ITT Population.

Time to Response, as Assessed by the IRC and Investigator

IRC,n=15, 18

Duration of Response (DoR), as Assessed by the IRC and Investigator

Progression-free Survival, as Assessed by the IRC and Investigator

Time to Treatment Failure, as Assessed by IRC and Investigator

Any AE

Any SAE

Safety Population: all randomized participants who received at least one dose of investigational product.

Number of Participants With Any Adverse Event (AE) or Serious Adverse Event (SAE)

Participants received lapatinib 1500 milligram (mg) orally once daily (QD). Treatment was continued for 12 weeks or until disease progression or withdrawal from treatment for another reason. After Week 12, participants with clinical benefit had the option to continue with the lapatinib therapy at the same dose and schedule, until disease progression, provided the treatment was tolerated.

Participants received lapatinib 500 mg orally twice daily (BID). Treatment was continued for 12 weeks or until disease progression or withdrawal from treatment for another reason. After Week 12, participants with clinical benefit had the option to continue with the lapatinib therapy at the same dose and schedule, until disease progression, provided the treatment was tolerated.

Spots Global Cancer Trial Database for Lapatinib In Chemotherapy-Naive Or Metastatic Breast Cancer

Trial Identification

Conditions

Interventions

Study Description

Keywords

Eligibility

Locations

Contact Details

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