A Phase I Open-Label, Dose Escalation Study to Investigate the Safety, Tolerability, Pharmacokinetics, Pharmacodynamics, Immunogenicity and Clinical Activity of the Antibody Drug Conjugate GSK2857916 in Japanese Participants With Relapsed/Refractory Multiple Myeloma

Part 1: Number of Participants With Dose Limiting Toxicities (DLTs)

时间窗: Up to Day 21

DLT is an Adverse Event (AE) that is considered by the investigator to be clinically relevant and attributed to the study therapy during the 21-day DLT period and meets at least one of the DLT criteria: Grade 3 or greater febrile neutropenia lasting \>48 hours (h) despite adequate treatment, Grade 4 thrombocytopenia \<25,000/mm\^3accompanied by clinically significant bleeding, any Grade 3 or greater non-hematologic toxicity, any Grade 3 or greater non-hematologic laboratory value if: laboratory abnormality persists for \>48 h despite supportive treatment for abnormality leads to hospitalization, Grade 4 Corneal toxicity, and liver toxicity meeting pre-specified GlaxoSmithKline liver stopping criteria. DLTs were assessed by National Cancer Institute- Common Toxicity Criteria for Adverse Events (NCI-CTCAE), version 4.03.

Part 2: Arm A: Number of Participants With DLTs

时间窗: Up to Day 21

DLT is an AE that is considered by the investigator to be clinically relevant and attributed to the study therapy during the 21-day DLT period and meets at least one of the DLT criteria: Grade 3 or greater febrile neutropenia lasting \>48 hours (h) despite adequate treatment, Grade 4 thrombocytopenia \<25,000/mm\^3 accompanied by clinically significant bleeding, any Grade 3 or greater non-hematologic toxicity, any Grade 3 or greater non-hematologic laboratory value if: laboratory abnormality persists for \>48 h despite supportive treatment or abnormality leads to hospitalization, Grade 4 Corneal toxicity, and liver toxicity meeting pre-specified GlaxoSmithKline liver stopping criteria. DLTs were assessed by NCI-CTCAE, version 4.03.

Part 2: Arm B: Number of Participants With DLTs

时间窗: Up to Day 28

DLT is an AE that is considered by the investigator to be clinically relevant and attributed to the study therapy during the 21-day DLT period and meets at least one of the DLT criteria: Grade 3 or greater febrile neutropenia lasting \>48 hours (h) despite adequate treatment, Grade 4 thrombocytopenia \<25,000/mm\^3 accompanied by clinically significant bleeding, any Grade 3 or greater non-hematologic toxicity, any Grade 3 or greater non-hematologic laboratory value if: laboratory abnormality persists for \>48 h despite supportive treatment or abnormality leads to hospitalization, Grade 4 Corneal toxicity, and liver toxicity meeting pre-specified GlaxoSmithKline liver stopping criteria. DLTs were assessed by NCI-CTCAE, version 4.03.

Part 1: Number of Participants With Adverse Events (AEs) and Serious Adverse Events (SAEs)

时间窗: Up to approximately 141 weeks

An AE is defined as any untoward medical occurrence in a participant or clinical investigation 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; was life threatening; required hospitalization or prolongation of existing hospitalization; resulted in disability/incapacity; was a congenital anomaly/birth defect. SAEs are subset of AEs.

Part 2: Number of Participants With Adverse Events (AEs) and Serious Adverse Events (SAEs)

时间窗: Up to approximately 212 weeks

An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of a study treatment, whether or not considered related to the study treatment. SAE is defined as any untoward medical occurrence that, at any dose results in death, Is life-threatening, Requires inpatient hospitalization or prolongation of existing hospitalization, Results in persistent disability/incapacity or Is a congenital anomaly/birth defect other situations which involve medical or scientific judgment or is associated with liver injury and impaired liver function. SAEs are subset of AEs.

Part 1: Number of Participants With Worst-case Grade Change From Baseline in Clinical Chemistry Parameters

时间窗: Baseline (Day 1) and up to approximately 141 weeks

Blood samples were collected for clinical chemistry parameters analysis: Creatine Kinase (CK), Creatinine, Gamma Glutamyl Transferase (GGT), Magnesium, Phosphate, Potassium, Sodium, Calcium, Glucose, Urate, Alanine Aminotransferase (ALT), Albumin, Alkaline Phosphatase (ALP), Aspartate Aminotransferase (AST), Bilirubin were graded according to National Cancer Institute-Common Terminology Criteria for Adverse Events (NCI-CTCAE) version (v) 4.03. Grade (G)1: mild; G2: moderate; G3: severe or medically significant; G4: life-threatening consequences. Higher grade indicates greater severity and increase in grade was defined relative to Baseline grade. Any worst-case post baseline increases in grade along with any increase to a maximum G3 and a maximum G4 are presented. Baseline was defined as the latest pre-dose assessment within 21 days prior to first dose with a non-missing value, including those from unscheduled visits.

Part 1: Number of Participants With Worst-case Change Post-baseline in Clinical Chemistry Parameters

时间窗: Baseline (Day 1) and up to approximately 141 weeks

Blood samples were collected for analysis of clinical chemistry parameters: C Reactive Protein, Chloride, Direct Bilirubin (DB), Lactate Dehydrogenase, Protein and Urea. The summaries of worst-case change from baseline with respect to normal range was analyzed for only those laboratory tests that were not gradable by CTCAE v4.03. The number of participants with decreases to low from baseline, changes to normal or no changes from baseline, and increases to high values have been presented. Baseline was defined as the latest pre-dose assessment within 21 days prior to first dose with a non-missing value, including those from unscheduled visits.

Part 2: Number of Participants With Worst-case Grade Change From Baseline in Clinical Chemistry Parameters

时间窗: Baseline (Day 1) and up to approximately 212 weeks

Blood samples were collected for clinical chemistry parameters analysis: Creatine Kinase (CK), Creatinine, Gamma Glutamyl Transferase (GGT), Magnesium, Phosphate, Potassium, Sodium, Calcium, Glucose, Urate, Alanine Aminotransferase (ALT), Albumin, Alkaline Phosphatase (ALP), Aspartate Aminotransferase (AST), Bilirubin were graded according to NCI-CTCAE v 4.03. G1: mild; G2: moderate; G3: severe or medically significant; G4: life-threatening consequences. Higher grade indicates greater severity and increase in grade was defined relative to Baseline grade. Any worst-case post baseline increases in grade along with any increase to a maximum G3 and a maximum G4 are presented. Baseline was defined as the latest pre-dose assessment within 21 days prior to first dose with a non-missing value, including those from unscheduled visits.

Part 2: Number of Participants With Worst-case Change Post-baseline in Clinical Chemistry Parameters

时间窗: Baseline (Day 1) and up to approximately 212 weeks

Blood samples were collected for analysis of clinical chemistry parameters: C Reactive Protein, Chloride, Direct Bilirubin (DB), Lactate Dehydrogenase, Protein and Urea. The summaries of worst-case change from baseline with respect to normal range was analyzed for only those laboratory tests that were not gradable by CTCAE v4.03. The number of participants with decreases to low from baseline, changes to normal or no changes from baseline, and increases to high values have been presented. Baseline was defined as the latest pre-dose assessment within 21 days prior to first dose with a non-missing value, including those from unscheduled visits.

Part 1: Number of Participants With Worst-case Grade Change From Baseline in Hematology Parameters

时间窗: Baseline (Day 1) and up to approximately 141 weeks

Blood samples were collected for analysis of hematology parameters: Hemoglobin, Leukocytes, Lymphocytes, Neutrophils and Platelets were graded according to CTCAE v4.03. G1: mild; G2: moderate; G3: severe or medically significant; G4: life-threatening consequences. Higher grade indicates greater severity and increase in grade was defined relative to Baseline grade. Any worst-case post baseline increases in grade along with any increase to a maximum G3 and a maximum G4 are presented. Baseline was defined as the latest pre-dose assessment within 21 days prior to first dose with a non-missing value, including those from unscheduled visits.

Part 1: Number of Participants With Worst-case Change Post-baseline in Hematology Parameters

时间窗: Baseline (Day 1) and up to approximately 141 weeks

Blood samples were collected for the analysis of following hematology parameters: Basophils, Eosinophils, Mean Corpuscular Hemoglobin Concentration (MCHC), Mean Corpuscular Hemoglobin (MCH), Mean Corpuscular Volume (MCV), erythrocytes, Hematocrit, monocytes and reticulocytes. The summaries of worst-case change from baseline with respect to normal range was analyzed for only those laboratory tests that were not gradable by CTCAE version 4.03. The number of participants with decreases to low from baseline, changes to normal or no changes from baseline, and increases to high values have been presented. Baseline was defined as the latest pre-dose assessment within 21 days prior to first dose with a non-missing value, including those from unscheduled visits.

Part 2: Number of Participants With Worst-case Grade Change From Baseline in Hematology Parameters

时间窗: Baseline (Day 1) and up to approximately 212 weeks

Blood samples were collected for analysis of hematology parameters: Hemoglobin, Leukocytes, Lymphocytes, Neutrophils and Platelets were graded according to CTCAE v4.03. G1: mild; G2: moderate; G3: severe or medically significant; G4: life-threatening consequences. Higher grade indicates greater severity and increase in grade was defined relative to Baseline grade. Any worst-case post baseline increases in grade along with any increase to a maximum G3 and a maximum G4 are presented. Baseline was defined as the latest pre-dose assessment within 21 days prior to first dose with a non-missing value, including those from unscheduled visits.

Part 2: Number of Participants With Worst-case Change Post-baseline in Hematology Parameters

时间窗: Baseline (Day 1) and up to approximately 212 weeks

Blood samples were collected for the analysis of following hematology parameters: Basophils, Eosinophils, MCHC, MCH, MCV, erythrocytes, Hematocrit, monocytes and reticulocytes. The summaries of worst-case change from baseline with respect to normal range was analyzed for only those laboratory tests that were not gradable by CTCAE version 4.03. The number of participants with decreases to low, changes to normal or no changes, and increases to high from baseline values have been presented. Baseline was defined as the latest pre-dose assessment within 21 days prior to first dose with a non-missing value, including those from unscheduled visits.

Part 1: Number of Participants With Worst-case Change in Post Baseline Values Relative to Baseline Urinalysis Results: Occult Blood and Protein

时间窗: Baseline (Day 1) and up to approximately 141 weeks

Urine samples were collected to analyze presence of occult blood and protein in urine by dipstick method. Data for worst-case post baseline urinalysis results is presented. Result for urinalysis parameters were recorded as no change/decreased, Increase to SMALL, Increase to MODERATE, Increase to LARGE, and any increase including increase to +-, 1+, 2+, 3+, unknown indicating proportional concentrations in the urine sample.

Part 2: Number of Participants With Worst-case Change in Post Baseline Values Relative to Baseline Urinalysis Results: Occult Blood and Protein

时间窗: Baseline (Day 1) and up to approximately 212 weeks

Urine samples were collected to analyze presence of occult blood and protein in urine by dipstick method. Data for worst-case post baseline urinalysis results is presented. Result for urinalysis parameters were recorded as no change/decreased, Increase to SMALL, Increase to MODERATE, Increase to LARGE, and any increase including increase to +-, 1+, 2+, 3+, unknown indicating proportional concentrations in the urine sample.

Part 1: Change From Baseline (CFB) in Urine Potential of Hydrogen (pH)

时间窗: Baseline (Day 1) and up to approximately 141 weeks

Urine samples were collected to analyze urine pH levels. Baseline was defined as the latest pre-dose assessment within 21 days prior to first dose with a non-missing value, including those from unscheduled visits.

Part 2: Change From Baseline in Urine Potential of Hydrogen (pH)

时间窗: Baseline (Day 1) and up to approximately 212 weeks

Urine samples were collected to analyze urine pH levels. Baseline was defined as the latest pre-dose assessment within 21 days prior to first dose with a non-missing value, including those from unscheduled visits.

Part 1: Change From Baseline in Urine Specific Gravity by Dipstick

时间窗: Baseline (Day 1) and up to approximately 141 weeks

Urine samples were collected to analyze urine specific gravity. Baseline was defined as the latest pre-dose assessment within 21 days prior to first dose with a non-missing value, including those from unscheduled visits.

Part 2: Change From Baseline in Urine Specific Gravity by Dipstick

时间窗: Baseline (Day 1) and up to approximately 212 weeks

Urine samples were collected to analyze urine specific gravity. Baseline was defined as the latest pre-dose assessment within 21 days prior to first dose with a non-missing value, including those from unscheduled visits.

Part 1: Number of Participants With Worst-case Grade Change Post-baseline in Vital Sign Parameters: Diastolic Blood Pressure (DBP) and Systolic Blood Pressure (SBP)

时间窗: Baseline (Day 1) and up to approximately 141 weeks

DBP and SBP were measured after resting for at least 5 minutes in a supine or semi-recumbent position. They were graded according to NCI-CTCAE version 4.03. For SBP: Grade (G) 0 (\<120 millimeter of mercury \[mmHg\]), G1 (120-139 mmHg), G2 (140-159 mmHg), G3 (\>=160 mmHg). For DBP: G0 (\<80 mmHg), G1 (80-89 mmHg), G2 (90-99 mmHg), G3 (\>=100 mmHg). Higher grade indicates greater severity. Data for participants with worst-case post baseline with any grade increase and a maximum post-baseline grade increase to G2 and G3 from their baseline grade are presented. Baseline was defined as the latest pre-dose assessment within 21 days prior to first dose with a non-missing value, including those from unscheduled visits.

Part 2: Number of Participants With Worst-case Grade Change Post-baseline in Vital Sign Parameters: Diastolic Blood Pressure (DBP) and Systolic Blood Pressure (SBP)

时间窗: Baseline (Day 1) and up to approximately 212 weeks

DBP and SBP were measured after resting for at least 5 minutes in a supine or semi-recumbent position. They were graded according to NCI-CTCAE version 4.03. For SBP: Grade (G) 0 (\<120 millimeter of mercury \[mmHg\]), G1 (120-139 mmHg), G2 (140-159 mmHg), G3 (\>=160 mmHg). For DBP: G0 (\<80 mmHg), G1 (80-89 mmHg), G2 (90-99 mmHg), G3 (\>=100 mmHg). Higher grade indicates greater severity. Data for participants with worst-case post baseline with any grade increase and a maximum post-baseline grade increase to G2 and G3 from their baseline grade are presented. Baseline was defined as the latest pre-dose assessment within 21 days prior to first dose with a non-missing value, including those from unscheduled visits.

Part 1: Number of Participants With Worst-case Change Post-baseline in Vital Sign Parameters: Temperature

时间窗: Baseline (Day 1) and up to approximately 141 weeks

Temperature was measured after resting for at least 5 minutes. The abnormal ranges for body temperature were (\<=35 degrees Celsius or \>=38 degrees Celsius). Baseline was defined as the latest pre-dose assessment within 21 days prior to first dose with a non-missing value, including those from unscheduled visits.

Part 2: Number of Participants With Worst-case Change Post-baseline in Vital Sign Parameters: Temperature

时间窗: Baseline (Day 1) and up to approximately 212 weeks

Temperature was measured after resting for at least 5 minutes. The abnormal ranges for body temperature were (\<=35 degrees Celsius or \>=38 degrees Celsius). Baseline was defined as the latest pre-dose assessment within 21 days prior to first dose with a non-missing value, including those from unscheduled visits.

Part 1: Number of Participants With Worst-case Change Post-baseline in Vital Sign Parameters: Heart Rate

时间窗: Baseline (Day 1) and up to approximately 141 weeks

Heart rate was measured after resting for at least 5 minutes. The abnormal ranges for heart rate were (low \<60 beats per minute \[bpm\] and high \>100 bpm). Baseline was defined as the latest pre-dose assessment within 21 days prior to first dose with a non-missing value, including those from unscheduled visits. Data for participants with worst case change from baseline was presented as Baseline to low, Baseline to Normal or No change and Baseline to High.

Part 2: Number of Participants With Worst-case Change Post-baseline in Vital Sign Parameters: Heart Rate

时间窗: Baseline (Day 1) and up to approximately 212 weeks

Heart rate was measured after resting for at least 5 minutes. The abnormal ranges for heart rate were (low \<60 beats per minute \[bpm\] and high \>100 bpm). Baseline was defined as the latest pre-dose assessment within 21 days prior to first dose with a non-missing value, including those from unscheduled visits. Data for participants with worst case change from baseline was presented as Baseline to low, Baseline to Normal or No change and Baseline to High.

Part 1: Number of Participants With Worst-Case Amount of Increase From Baseline Value in Corrected QT Interval Using Fredericia's Formula (QTcF)

时间窗: Baseline (Day 1) and up to approximately 141 weeks

12-lead electrocardiogram (ECG) was obtained using an automated ECG machine that automatically calculated the heart rate and measured PR, QRS, QT, and QT interval corrected using Fridericia's formula (QTcF) intervals. Grade 0 (\<450 millisecond (msec)), Grade 1 (450-480 msec), Grade 2 (481-500 msec), and Grade 3 (≥501 msec). Higher grade indicates greater severity. Data for participants with worst-case post baseline with any grade increase and a post-baseline grade increase to G2 and G3 from their baseline grade are presented. Baseline was defined as the latest pre-dose assessment within 21 days prior to first dose with a non-missing value, including those from unscheduled visits.

Part 2: Number of Participants With Worst-Case Amount of Increase From Baseline Value in QTcF

时间窗: Baseline (Day 1) and up to approximately 212 weeks

12-lead electrocardiogram (ECG) was obtained using an automated ECG machine that automatically calculated the heart rate and measured PR, QRS, QT, and QT interval corrected using Fridericia's formula (QTcF) intervals. Grade 0 (\<450 millisecond (msec)), Grade 1 (450-480 msec), Grade 2 (481-500 msec), and Grade 3 (≥501 msec). Higher grade indicates greater severity. Data for participants with worst-case post baseline with any grade increase and a post-baseline grade increase to G2 and G3 from their baseline grade are presented. Baseline was defined as the latest pre-dose assessment within 21 days prior to first dose with a non-missing value, including those from unscheduled visits.

Part 1: Number of Participants With Worst-case Change Post-baseline in Eastern Cooperative Oncology Group (ECOG) Performance Status

时间窗: Baseline (Day 1) and up to approximately 141 weeks

The number of participants with worst-case post baseline performance status have been presented as 0-5. Where, 0- Fully active; 1- Restricted in strenuous activity but able to carry out light work activities; 2- Capable of self-care but unable to carry out any work activities; 3- Capable of limited self care, confined to bed/chair more than 50% of waking hours; 4- Completely disabled; can't carry on any self care; totally confined to bed/chair and 5- Dead.Baseline was defined as the latest pre-dose assessment within 21 days prior to first dose with a non-missing value, including those from unscheduled visits.

Part 2: Number of Participants With Clinically Significant Abnormalities in ECOG Performance Status

时间窗: Baseline (Day 1) and up to approximately 212 weeks

Any change in ECOG Performance status that was clinically significant in the medical and scientific judgment of the investigator and not related to an underlying disease was reported.