A Combination Study of Kadcyla (Trastuzumab Emtansine) and Capecitabine in Participants With Human Epidermal Growth Factor Receptor 2 (HER2)-Positive Metastatic Breast Cancer (mBC) or HER2-Positive Locally Advanced/Metastatic Gastric Cancer (LA/mGC)
TerminatedPhase 2Results postedLast updated 22 January 2021
What this trial tests
Phase 2 trial testing Capecitabine in Breast Cancer in 182 participants. Terminated before completion.
18 and older, any sex, with Breast Cancer or Gastric Cancer. Patients with the condition only — healthy volunteers not accepted.
Results — posted to ClinicalTrials.gov
Per-arm endpoint measurements with 95% confidence intervals where reported. Source: trial results section.
Phase 1 (mBC): Percentage of Participants With Dose-Limiting Toxicities (DLTs)Primary· Continuously during Cycle 1 (up to 3 weeks)
A DLT was defined as any one of the following study treatment related toxicities: Uncomplicated Grade 4 thrombocytopenia that does not recover before Day 21; thrombocytopenia complicated with clinically significant bleeding requiring medical intervention; Grade 4 neutropenia lasting more than (\>) 7 consecutive days; febrile neutropenia with absolute neutrophil count (ANC) less than (\<) 1000 cells/millimeter cube (mm\^3); Grade greater than or equal to (\>/=) 3 diarrhea or Grade 3 hand-foot syndrome (in absence of dihydropyrimidine dehydrogenase \[DPD\] deficiency only for DL 1); any other Gr
Group
Value
95% CI
Phase 1 (mBC) Cohort 1 (DL 1): T-DM1 + Cape
33.3
Phase 1 (mBC) Cohort 1 (DL -1): T-DM1 + Cape
0.0
Phase 1 (mBC): Maximum Tolerated Dose (MTD) of Capecitabine When Combined With Trastuzumab Emtansine (3.6 mg/kg Every 3 Weeks)Primary· Continuously during Cycle 1 (up to 3 weeks)
MTD was defined as the dose level for which the probability of DLT is equal to a protocol-specified target probability. A DLT was defined as any one of the following study treatment related toxicities: Uncomplicated Grade 4 thrombocytopenia that does not recover before Day 21; thrombocytopenia complicated with clinically significant bleeding requiring medical intervention; Grade 4 neutropenia lasting \>7 consecutive days; febrile neutropenia with ANC \<1000 cells/mm\^3; Grade \>/=3 diarrhea or Grade 3 hand-foot syndrome (in absence of DPD deficiency only for DL 1); any other Grade \>/=3 toxici
Group
Value
95% CI
Phase 1 (mBC) Cohort 1: T-DM1 + Cape
700
Phase 2 (mBC): Percentage of Participants With Best Overall Response (BOR) as Assessed by the Investigator According to Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST v1.1)Primary· Baseline until CR/PR, consent withdrawal, or study end whichever occurred first (up to approximately 2.5 years overall)
Tumor response was assessed by the investigator according to RECIST v1.1. BOR was defined as percentage of participants with a complete response (CR) or partial response (PR) that was confirmed by repeat assessments \>/=4 weeks after initial documentation. CR was defined as the disappearance of all target lesions (TLs) and non-TLs; short axis (SA) reduction to \<10 millimeters (mm) for nodal TLs/non-TLs; and no new lesions. PR was defined as \>/=30% decrease in sum of diameters (SoD) of TLs, taking as reference the baseline SoD; no progression in non-TLs; and no new lesions. The 90% confidence
Group
Value
95% CI
Phase 2 (mBC): T-DM1 + Cape
44.4
35.0 – 54.2
Phase 2 (mBC): T-DM1
36.3
27.3 – 46.0
Phase 1 (LA/mGC): Percentage of Participants With DLTsPrimary· Continuously during 3 weeks
A DLT was defined as any one of the following study treatment related toxicities: Uncomplicated Grade 4 thrombocytopenia that does not recover before Day 21; thrombocytopenia complicated with clinically significant bleeding requiring medical intervention; Grade 4 neutropenia lasting \>7 consecutive days; febrile neutropenia with ANC \<1000 cells/mm\^3; Grade \>/=3 diarrhea or Grade 3 hand-foot syndrome; any other Grade \>/=3 toxicity prohibiting start of Cycle 2; Grade 2 toxicity requiring treatment interruption for \>14 days; \<14 full doses of capecitabine; Cycle 2 dose level \<100%.
Group
Value
95% CI
Phase 1 (LA/mGC) Cohort 2 (DL -1): T-DM1 + Cape
0.0
Phase 1 (LA/mGC): MTD of Capecitabine When Combined With Trastuzumab Emtansine (2.4 mg/kg QW)Primary· Continuously during 3 weeks
MTD was defined as the dose level for which the probability of DLT is equal to a protocol-specified target probability. A DLT was defined as any one of the following study treatment related toxicities: Uncomplicated Grade 4 thrombocytopenia that does not recover before Day 21; thrombocytopenia complicated with clinically significant bleeding requiring medical intervention; Grade 4 neutropenia lasting \>7 consecutive days; febrile neutropenia with ANC \<1000 cells/mm\^3; Grade \>/=3 diarrhea or Grade 3 hand-foot syndrome; any other Grade \>/=3 toxicity prohibiting start of Cycle 2; Grade 2 toxi
Group
Value
95% CI
Phase 1 (LA/mGC) Cohort 2 (DL -1): T-DM1 + Cape
700
Phase 1 (mBC): Percentage of Participants With BOR as Assessed by the Investigator According to RECIST v1.1Secondary· Baseline until CR/PR, consent withdrawal, or study end whichever occurred first (up to approximately 3.5 years overall)
Tumor response was assessed by the investigator according to RECIST v1.1. BOR in Phase 1 was defined as percentage of participants with a CR or PR. CR was defined as the disappearance of all TLs and non-TLs; SA reduction to \<10 mm for nodal TLs/non-TLs; and no new lesions. PR was defined as \>/=30% decrease in SoD of TLs, taking as reference the baseline SoD; no progression in non-TLs; and no new lesions.
Group
Value
95% CI
Phase 1 (mBC) Cohort 1 (DL 1): T-DM1 + Cape
83.3
Phase 1 (mBC) Cohort 1 (DL -1): T-DM1 + Cape
100.0
Phase 1 (mBC): Serum Concentration of Trastuzumab EmtansineSecondary· Pre-trastuzumab emtansine dose (0 hour [h]) on Day 1 Cycle 2; 15-30 minutes (min) after end of trastuzumab emtansine infusion (maximum infusion duration = 90 min) on Day 2 Cycle 1 and Day 1 Cycle 2 (cycle length=21 days)
Cycle 1, Post-dose
Group
Value
95% CI
Phase 1 (mBC) Cohort 1 (DL 1): T-DM1 + Cape
81.3
± 13.3
Phase 1 (mBC) Cohort 1 (DL -1): T-DM1 + Cape
78.6
± 14.6
Cycle 2, Pre-dose
Group
Value
95% CI
Phase 1 (mBC) Cohort 1 (DL 1): T-DM1 + Cape
1.17
± 1.25
Phase 1 (mBC) Cohort 1 (DL -1): T-DM1 + Cape
2.1
± 1.49
Cycle 2, Post-dose
Group
Value
95% CI
Phase 1 (mBC) Cohort 1 (DL 1): T-DM1 + Cape
70.5
± 13.3
Phase 1 (mBC) Cohort 1 (DL -1): T-DM1 + Cape
78.5
± 14.9
Phase 1 (mBC): Serum Concentration of TrastuzumabSecondary· Pre-trastuzumab emtansine dose (0 h) on Day 1 Cycle 2; 15-30 min after end of trastuzumab emtansine infusion (maximum infusion duration = 90 min) on Day 2 Cycle 1 and Day 1 Cycle 2 (cycle length=21 days)
Trastuzumab was derived from trastuzumab emtansine.
Cycle 1, Post-dose
Group
Value
95% CI
Phase 1 (mBC) Cohort 1 (DL 1): T-DM1 + Cape
89.1
± 24.37
Phase 1 (mBC) Cohort 1 (DL -1): T-DM1 + Cape
92.9
± 22.13
Cycle 2, Pre-dose
Group
Value
95% CI
Phase 1 (mBC) Cohort 1 (DL 1): T-DM1 + Cape
11.8
± 13.28
Phase 1 (mBC) Cohort 1 (DL -1): T-DM1 + Cape
14.0
± 12.53
Cycle 2, Post-dose
Group
Value
95% CI
Phase 1 (mBC) Cohort 1 (DL 1): T-DM1 + Cape
74.8
± 18.89
Phase 1 (mBC) Cohort 1 (DL -1): T-DM1 + Cape
94.7
± 24.60
Phase 1 (mBC): Maximum Observed Plasma Concentration (Cmax) of CapecitabineSecondary· Pre-capecitabine dose (0 h) and 0.5, 1, 1.5, 2, 2.5, 4, and 6 h post-capecitabine dose on Day 1 Cycle 1
Cmax for Capecitabine was estimated from plasma concentration versus time data using non-compartmental methods of analysis. Reported dispersion values are for percent coefficient of variation (CV%) and not for standard deviation.
Group
Value
95% CI
Phase 1 (mBC) Cohort 1 (DL 1): T-DM1 + Cape
2990
± 38.4
Phase 1 (mBC) Cohort 1 (DL -1): T-DM1 + Cape
5652
± 91.1
Phase 1 (mBC): Area Under the Plasma Concentration-Time Curve From Time Zero to Infinity (AUC[0-inf]) of CapecitabineSecondary· Pre-capecitabine dose (0 h) and 0.5, 1, 1.5, 2, 2.5, 4, and 6 h post-capecitabine dose on Day 1 Cycle 1
AUC(0-inf) is the measure of total drug exposure and is dependent on the total amount of drug absorbed. AUC(0-inf) for capecitabine was estimated from plasma concentration versus time data using non-compartmental methods of analysis. Reported dispersion values are for CV% and not for standard deviation.
Group
Value
95% CI
Phase 1 (mBC) Cohort 1 (DL 1): T-DM1 + Cape
3973
± 38.0
Phase 1 (mBC) Cohort 1 (DL -1): T-DM1 + Cape
5440
± 57.7
Phase 1 (mBC): Plasma Terminal Half-Life (t1/2) of CapecitabineSecondary· Pre-capecitabine dose (0 h) and 0.5, 1, 1.5, 2, 2.5, 4, and 6 h post-capecitabine dose on Day 1 Cycle 1
Plasma terminal half-life is the time measured for the plasma drug concentration to decrease by one half during the elimination phase of the drug. t1/2 for capecitabine was estimated from plasma concentration versus time data using non-compartmental methods of analysis. Reported dispersion values are for CV% and not for standard deviation.
Group
Value
95% CI
Phase 1 (mBC) Cohort 1 (DL 1): T-DM1 + Cape
0.70
± 131.9
Phase 1 (mBC) Cohort 1 (DL -1): T-DM1 + Cape
0.39
± 38.8
Phase 1 (mBC): Cmax of 5-Fluorouracil (Metabolite of Capecitabine)Secondary· Pre-capecitabine dose (0 h) and 0.5, 1, 1.5, 2, 2.5, 4, and 6 h post-capecitabine dose on Day 1 Cycle 1
5-fluorouracil is a metabolite of capecitabine. Cmax for 5-fluorouracil was estimated from plasma concentration versus time data using non-compartmental methods of analysis. Reported dispersion values are for CV% and not for standard deviation.
Group
Value
95% CI
Phase 1 (mBC) Cohort 1 (DL 1): T-DM1 + Cape
148
± 49.9
Phase 1 (mBC) Cohort 1 (DL -1): T-DM1 + Cape
143
± 45.6
Adverse events — posted to ClinicalTrials.gov
Time frame: Phase 1: Baseline up to 42 days after last dose (up to approximately 1.5 years overall); Phase 2: Baseline up to 42 days after last dose (up to approximately 2.5 years overall).
Reporting threshold: 5%.
Adverse-event reports describe events observed during the trial — not all are caused by the drug.
Phase 1 (mBC) Cohort 1 (DL 1): T-DM1 + Cape
Serious: 0/7 (0%)
Deaths: 4/7
Phase 1 (mBC) Cohort 1 (DL -1): T-DM1 + Cape
Serious: 2/5 (40%)
Deaths: 3/5
Phase 1 (LA/mGC) Cohort 2 (DL -1): T-DM1 + Cape
Serious: 4/6 (67%)
Deaths: 3/6
Phase 2 (mBC): T-DM1 + Cape
Serious: 11/82 (13%)
Deaths: 18/82
Phase 2 (mBC): T-DM1
Serious: 10/78 (13%)
Deaths: 21/78
Serious adverse events (36 terms)
Reaction
System
Phase 1 (mBC) Cohort 1 (DL…
Phase 1 (mBC) Cohort 1 (DL…
Phase 1 (LA/mGC) Cohort 2 …
Phase 2 (mBC): T-DM1 + Cape
Phase 2 (mBC): T-DM1
Abdominal pain
Gastrointestinal disorders
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Muscular weakness
Musculoskeletal and connective tissue disorders
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Pathological fracture
Musculoskeletal and connective tissue disorders
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Brain oedema
Nervous system disorders
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Cerebral cyst
Nervous system disorders
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Radiation necrosis
Injury, poisoning and procedural complications
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Myocardial infarction
Cardiac disorders
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Diarrhoea
Gastrointestinal disorders
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Device related sepsis
Infections and infestations
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Tumour haemorrhage
Neoplasms benign, malignant and unspecified (incl cysts and polyps)
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Renal colic
Renal and urinary disorders
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Tumour excision
Surgical and medical procedures
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Colitis ischaemic
Gastrointestinal disorders
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Intestinal haematoma
Gastrointestinal disorders
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Mesenteric vein thrombosis
Gastrointestinal disorders
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Vomiting
Gastrointestinal disorders
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Gastroenteritis
Infections and infestations
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Bacterial sepsis
Infections and infestations
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Device related infection
Infections and infestations
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Upper respiratory tract infection
Infections and infestations
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Urinary tract infection
Infections and infestations
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Wound sepsis
Infections and infestations
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Haematuria
Renal and urinary disorders
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Anuria
Renal and urinary disorders
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Pleural effusion
Respiratory, thoracic and mediastinal disorders
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Other adverse events (231 terms — click to expand)
This multicenter study will assess the maximum tolerated dose (MTD) of capecitabine in combination with Kadcyla (trastuzumab emtansine) in participants with HER2-positive mBC or HER2-positive LA/mGC using a Phase 1 design, followed by a randomized, open-label Phase 2 part to explore the efficacy and safety of the combination of Kadcyla and capecitabine compared with Kadcyla alone in participants with mBC. The anticipated time on study treatment is until disease progression, intolerable toxicity, withdrawal of consent, or study end.
Publications & conference data
8 peer-reviewed publications reference this trial (live from Europe PMC):
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Publications: Europe PMC API search by NCT ID, retrieved 10 June 2026
Drug + disease cross-links: matched in real time against Drug Landscape's normalised drug + company + condition tables
Sponsor: as reported to ClinicalTrials.gov by Hoffmann-La Roche
Last refreshed: 22 January 2021
Drug Landscape aggregates and links these public records for informational use only. Always verify against the primary source before clinical or regulatory decisions. Canonical URL: https://druglandscape.com/trial/NCT01702558.