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Dose Finding Study Of CP-870,893, An Immune System Stimulating Antibody, In Combination With Paclitaxel And Carboplatin For Patients With Metastatic Solid Tumors

A Phase 1 Study Of CP- 870,893 In Combination With Paclitaxel And Carboplatin In Patients With Metastatic Solid Tumors

Status
Completed
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT00607048
Enrollment
34
Registered
2008-02-05
Start date
2007-11-30
Completion date
2009-07-31
Last updated
2017-03-27

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Neoplasms

Brief summary

This is a dose-finding study; therefore, there is no hypothesis testing

Interventions

DRUGPaclitaxel + Carboplatin + CP-870,893

Paclitaxel is administered intravenously on day 1 of a 21-day cycle at a dose of 175 mg/m\^2. Carboplatin is administered intravenously on day 1 of a 21-day cycle at AUC 6. CP-870,893 is administered intravenously on DAY 3 of a 21-day cycle in escalating doses (0.1 mg/kg and 0.2 mg/kg)

Sponsors

Hoffmann-La Roche
Lead SponsorINDUSTRY

Study design

Allocation
NON_RANDOMIZED
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to 85 Years
Healthy volunteers
No

Inclusion criteria

* Patients with metastatic solid tumors, for whom carboplatin and paclitaxel are appropriate; * Patients \>18 years of age; * Good performance status; * Adequate bone marrow and organ function

Exclusion criteria

* Previous treatment with any other compound that targets CD40 * Current or planned concurrent treatment with any anticancer agent; * Patients who have received bone marrow transplant; * History of autoimmune disorder * History (within the previous year) of heart failure or heart attack * Cancer-associated coagulation disorders

Design outcomes

Primary

MeasureTime frameDescription
Number of Participants With First Cycle Dose Limiting Toxicities (DLTs)Schedule (Sch) A Cycle 1 / Day 3 or Schedule B Cycle 1 / Day 8 up to Cycle 1 / Day 21Any of the following during first cycle of treatment and attributable to CP-870893: Grade (Gr) 4 neutropenia (absolute neutrophil count \[ANC\] \<500 cells/mm\^3) for ≥7 days; Gr 3 or 4 febrile neutropenia (ANC \<1000/mm\^3, fever ≥38.5 degrees Celsius; platelets ≤25,000 cells/mm\^3); ≥Gr 3 non-hematological adverse event despite optimal supportive care; ≥Gr 3 cytokine release syndrome or acute infusion reaction; failure to recover to Gr \<1 toxicity after delaying next cycle by maximum of 2 weeks; Day 3 or 8 ANC \<1000 cells/mm\^3 or platelets \<80000 cells/mm\^3, or non-hematologic toxicity ≥Gr 2.

Secondary

MeasureTime frameDescription
Area Under the Curve From Time Zero to Last Quantifiable Concentration (AUClast)Schedule A Day 3 of each 21 Day Cycle, Schedule B Day 8 of each 21 Day Cycle: Pre-dose, 5 minutes after end of infusion, and 2, 6, and 24 hours post-dose up to a maximum of 8 cycles (6 months)Area under the serum concentration time-curve from time zero to the last measured concentration. AUClast was estimated using non-compartmental methods on the sequence of sample measurements. Mean of individual observed AUClast values measured as nanograms multiplied by micrograms per milliliter (ng\*mcg/mL).
Tumor Response of Partial Response (PR) and Complete Response CR) According to Response Evaluation Criteria in Solid Tumors (RECIST)Schedule A and Schedule B: Baseline and Day 21 of every even numbered cycle up to a maximum of 8 cycles (6 months)Number of participants with objective response based assessment of confirmed complete response (CR) or confirmed partial response (PR) according to RECIST. Confirmed responses are those that persist on repeat imaging study at least 4 weeks after initial documentation of response. CR was defined as the disappearance of all target and nontarget lesions. PR was defined as a ≥30% decrease in the sum of the longest dimensions (LD) of the target lesions taking as a reference the baseline sum LD.
Change in Cytokine Concentrations of Interleukin 6 (IL 6): Pre-dose Concentration (CYTO0), Maximum Post-dose Concentration (CYTOMAX)Schedule A Cycle 1 / Day 3 and Schedule B Cycle 1 / Day 8: predose, end of infusion, 1 , 2, 4, 6, 24, and 48 hours postdoseConcentrations reported as the mean of the pre-dose values and the mean of the maximum post-dose values to show change. An increase in values indicates greater cytokine release from cells targeted by the antibody and may be associated with an infusion reaction.
Change in Cytokine Concentrations of Tumor Necrosis Factor Alpha (TNF Alpha): CYTO0, CYTOMAXSchedule A Cycle 1 / Day 3 and Schedule B Cycle 1 / Day 8: predose, end of infusion, 1 , 2, 4, 6, 24, and 48 hours postdoseConcentrations reported as the mean of the pre-dose values and the mean of the maximum post-dose values to show change. An increase in values indicates greater cytokine release from cells targeted by the antibody and may be associated with an infusion reaction.
Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD19 Pre-dose Percentage (PD0), Maximum Post-dose Percentage (PDmax)Schedule A Cycle 1 / Day 3 and Schedule B Cycle 1 / Day 8: predose, 6, 24, and 48 hours postdoseAssess activity of B cells (involved in production of antibodies) in presence of CP-870893. Clusters of differentiation (CD) are specific types of proteins on cell surface. CD19 is a B cell antigen receptor and is used to quantitate changes in proportion of B cells in peripheral blood as a consequence of therapy. Higher numbers may indicate a greater presence of CD19 on cell surface with increased potential for antigen response. Percentage of cells reported as the mean of the pre-dose values and the mean of the maximum post-dose values to show change.
Maximum Observed Serum Concentration (Cmax)Schedule A Day 3 of each 21 Day Cycle, Schedule B Day 8 of each 21 Day Cycle: Pre-dose, 5 minutes after end of infusion, and 2, 6, and 24 hours (hrs) post-dose up to a maximum of 8 cycles (6 months)Mean of individual observed Cmax values measured as micrograms per milliliter (mcg/mL).
Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD23 PD0, PDmaxSchedule A Cycle 1 / Day 3 and Schedule B Cycle 1 / Day 8: predose, 6, 24, and 48 hours postdoseAssess activity of B cells in the presence of CP-870893. CD23 is a low-affinity receptor that has a role in transportation in antibody feedback regulation. Agents that engage CD40 have been reported to increase CD23 expression; increased CD23 expression may, therefore, serve as a marker for CD40 binding by CP-870893. Higher numbers may indicate a potential for increased antibody response. Percentage of cells reported as the mean of the pre-dose values and the mean of the maximum post-dose values to show change.
Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD54 PD0, PDmaxSchedule A Cycle 1 / Day 3 and Schedule B Cycle 1 / Day 8: predose, 6, 24, and 48 hours postdoseAssess activity of B cells in presence of CP-870893. CD54 is an intercellular adhesion molecule. When activated, leukocytes bind to endothelial cells via CD54 and then transmigrate into tissues. Agents that engage CD40 have been reported to increase CD54 expression; increased CD54 expression may, therefore, serve as a marker for CD40 binding by CP-870893. Higher numbers may indicate potential for increased immune response. Percentage of cells reported as the mean of the pre-dose values and the mean of the maximum post-dose values to show change.
Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD86 PD0, PDmaxSchedule A Cycle 1 / Day 3 and Schedule B Cycle 1 / Day 8: predose, 6, 24, and 48 hours postdoseAssess activity of B cells in presence of CP-870893. CD86 is a protein expressed on antigen-presenting cells and provides co-stimulatory signals for T cell (role in cell-modulated immunity) activation. Agents that engage CD40 have been reported to increase CD86 expression; increased CD86 expression may, therefore, serve as a marker for CD40 binding by CP-870893. Higher numbers may indicate potential for increased immune response. Percentage of cells reported as the mean of the pre-dose values and the mean of the maximum post-dose values to show change.
Change in Bone Marrow Derived Cells (B Cell) Surface Markers: Human Leukocyte Antigen (HLA-DR) PD0, PDmaxSchedule A Cycle 1 / Day 3 and Schedule B Cycle 1 / Day 8: predose, 6, 24, and 48 hours postdoseAssess activity of B cells in presence of CP-870893. HLA-DR is a component of the Major Histocompatibility Complex in humans and presents antigens for recognition by the immune system. Agents that engage CD40 have been reported to increase HLA-DR expression; increased HLA-DR expression may serve as a marker for CD40 binding by CP-870893. Positive values may indicate greater presence of cells associated with potential for antibody production. Percentage of cells reported as the mean of the pre-dose values and the mean of the maximum post-dose values to show change.
Total and Neutralizing Human Antihuman Antibody (HAHA) TiterSchedule A Day 3 of each 21 Day Cycle, Schedule B Day 8 of each 21 Day Cycle: Pre-dose up to a maximum of 8 cycles (6 months)HAHA assessed as an indicator of immunogenicity to CP-870893.
Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD40 PD0, PDmaxSchedule A Cycle 1 / Day 3 and Schedule B Cycle 1 / Day 8: predose, 6, 24, and 48 hours postdoseAssess activity of B cells in the presence of CP-870893. CD40 is a costimulatory protein and is a target for CP-870893. Measurement of CD40 on white blood cells provides a measure of target modulation by CP-870893. Higher numbers may indicate potential for increased activation of antigen presenting cells. Percentage of cells reported as the mean of the pre-dose values and the mean of the maximum post-dose values to show change.

Countries

United States

Participant flow

Pre-assignment details

16 participants were screened, enrolled, and received at least 1 dose of study treatment in Schedule A. 18 participants were screened and enrolled in Schedule B; however, 2 participants discontinued before assignment to study treatment; 16 participants received at least 1 dose of study treatment in Schedule B.

Participants by arm

ArmCount
Schedule A - CP-870893
Participants received fixed dose chemotherapy (carboplatin and paclitaxel) IV on Day 1 of every 21 day cycle. CP-870893 administered IV on Day 3 of every 21 day cycle with starting dose of 0.1 mg/kg (0.1 mg/kg cohort). If 0 out of 3 or \<2 out of 6 participants in the CP-870893 0.1 mg/kg cohort experienced a dose limiting toxicity in Cycle 1, subsequent participants were enrolled in the 0.2 mg/kg dose cohort and received CP-870893 0.2 mg/kg IV on Day 3 of every 21 day cycle (0.2 mg/kg escalation cohort). If 0 out of 3 or \<2 out of 6 participants in the CP-870893 0.2 mg/kg cohort (escalation cohort) experienced a dose limiting toxicity in Cycle 1, 0.2 mg/kg was considered the MTD. Additional participants were enrolled in the 0.2 mg/kg dose cohort and received CP-870893 0.2 mg/kg IV on Day 3 of every 21 day cycle (0.2 mg/kg expansion cohort).
16
Schedule B - CP-870893
Participants received fixed dose chemotherapy (carboplatin and paclitaxel) IV on Day 1 of every 21 day cycle. CP-870893 administered IV on Day 8 of every 21 day cycle with starting dose of 0.1 mg/kg (0.1 mg/kg cohort). If 0 out of 3 or \<2 out of 6 participants in the CP-870893 0.1 mg/kg cohort experienced a dose limiting toxicity in Cycle 1, subsequent participants were enrolled in the 0.2 mg/kg dose cohort and received CP-870893 0.2 mg/kg IV on Day 8 of every 21 day cycle (0.2 mg/kg escalation cohort). If 0 out of 3 or \<2 out of 6 participants in the CP-870893 0.2 mg/kg cohort (escalation cohort) experienced a dose limiting toxicity in Cycle 1, 0.2 mg/kg was considered the MTD. Additional participants were enrolled in the 0.2 mg/kg dose cohort and received CP-870893 0.2 mg/kg IV on Day 8 of every 21 day cycle (0.2 mg/kg expansion cohort).
16
Total32

Withdrawals & dropouts

PeriodReasonFG000FG001FG002FG003FG004FG005
Overall StudyAdverse Event010040
Overall StudyGlobal deterioration of health100000
Overall StudyObjective disease progression - relapse124222
Overall StudyOther110001
Overall StudyWithdrawal by Subject000102

Baseline characteristics

CharacteristicSchedule A - CP-870893Schedule B - CP-870893Total
Age, Continuous58.4 years
STANDARD_DEVIATION 13.4
54.5 years
STANDARD_DEVIATION 12.7
56.4 years
STANDARD_DEVIATION 13
Sex: Female, Male
Female
3 Participants6 Participants9 Participants
Sex: Female, Male
Male
13 Participants10 Participants23 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
EG004
affected / at risk
EG005
affected / at risk
deaths
Total, all-cause mortality
— / —— / —— / —— / —— / —— / —
other
Total, other adverse events
3 / 36 / 67 / 73 / 36 / 67 / 7
serious
Total, serious adverse events
1 / 33 / 62 / 70 / 33 / 62 / 7

Outcome results

Primary

Number of Participants With First Cycle Dose Limiting Toxicities (DLTs)

Any of the following during first cycle of treatment and attributable to CP-870893: Grade (Gr) 4 neutropenia (absolute neutrophil count \[ANC\] \<500 cells/mm\^3) for ≥7 days; Gr 3 or 4 febrile neutropenia (ANC \<1000/mm\^3, fever ≥38.5 degrees Celsius; platelets ≤25,000 cells/mm\^3); ≥Gr 3 non-hematological adverse event despite optimal supportive care; ≥Gr 3 cytokine release syndrome or acute infusion reaction; failure to recover to Gr \<1 toxicity after delaying next cycle by maximum of 2 weeks; Day 3 or 8 ANC \<1000 cells/mm\^3 or platelets \<80000 cells/mm\^3, or non-hematologic toxicity ≥Gr 2.

Time frame: Schedule (Sch) A Cycle 1 / Day 3 or Schedule B Cycle 1 / Day 8 up to Cycle 1 / Day 21

Population: Safety population: all participants who received at least 1 dose of study treatment.

ArmMeasureValue (NUMBER)
Schedule A - CP-870893 0.1 mg/kgNumber of Participants With First Cycle Dose Limiting Toxicities (DLTs)0 participants
Schedule A - CP-870893 0.2 mg/kg (Escalation Cohort)Number of Participants With First Cycle Dose Limiting Toxicities (DLTs)1 participants
Schedule A - CP-870893 0.2 mg/kg (Expansion Cohort)Number of Participants With First Cycle Dose Limiting Toxicities (DLTs)0 participants
Schedule B - CP-870893 0.1 mg/kgNumber of Participants With First Cycle Dose Limiting Toxicities (DLTs)0 participants
Schedule B - CP-870893 0.2 mg/kg (Escalation Cohort)Number of Participants With First Cycle Dose Limiting Toxicities (DLTs)1 participants
Schedule B - CP-870893 0.2 mg/kg (Expansion Cohort)Number of Participants With First Cycle Dose Limiting Toxicities (DLTs)0 participants
Secondary

Area Under the Curve From Time Zero to Last Quantifiable Concentration (AUClast)

Area under the serum concentration time-curve from time zero to the last measured concentration. AUClast was estimated using non-compartmental methods on the sequence of sample measurements. Mean of individual observed AUClast values measured as nanograms multiplied by micrograms per milliliter (ng\*mcg/mL).

Time frame: Schedule A Day 3 of each 21 Day Cycle, Schedule B Day 8 of each 21 Day Cycle: Pre-dose, 5 minutes after end of infusion, and 2, 6, and 24 hours post-dose up to a maximum of 8 cycles (6 months)

Population: Pharmacokinetic data analysis set; N=number of participants who did not have pre-dose levels of CP-870893.

ArmMeasureValue (MEAN)Dispersion
Schedule A - CP-870893 0.1 mg/kgArea Under the Curve From Time Zero to Last Quantifiable Concentration (AUClast)3.37 hr*mcg/mLStandard Deviation 1.2
Schedule A - CP-870893 0.2 mg/kg (Escalation Cohort)Area Under the Curve From Time Zero to Last Quantifiable Concentration (AUClast)10.4 hr*mcg/mLStandard Deviation 9.3
Schedule A - CP-870893 0.2 mg/kg (Expansion Cohort)Area Under the Curve From Time Zero to Last Quantifiable Concentration (AUClast)7.5 hr*mcg/mLStandard Deviation 8.7
Schedule B - CP-870893 0.1 mg/kgArea Under the Curve From Time Zero to Last Quantifiable Concentration (AUClast)1.35 hr*mcg/mL
Schedule B - CP-870893 0.2 mg/kg (Escalation Cohort)Area Under the Curve From Time Zero to Last Quantifiable Concentration (AUClast)13.0 hr*mcg/mLStandard Deviation 10.3
Schedule B - CP-870893 0.2 mg/kg (Expansion Cohort)Area Under the Curve From Time Zero to Last Quantifiable Concentration (AUClast)5.71 hr*mcg/mLStandard Deviation 5.36
Secondary

Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD19 Pre-dose Percentage (PD0), Maximum Post-dose Percentage (PDmax)

Assess activity of B cells (involved in production of antibodies) in presence of CP-870893. Clusters of differentiation (CD) are specific types of proteins on cell surface. CD19 is a B cell antigen receptor and is used to quantitate changes in proportion of B cells in peripheral blood as a consequence of therapy. Higher numbers may indicate a greater presence of CD19 on cell surface with increased potential for antigen response. Percentage of cells reported as the mean of the pre-dose values and the mean of the maximum post-dose values to show change.

Time frame: Schedule A Cycle 1 / Day 3 and Schedule B Cycle 1 / Day 8: predose, 6, 24, and 48 hours postdose

Population: Biomarker data analysis set: All enrolled participants who started treatment and who had baseline and sufficient on-study samples to provide interpretable results. N=Number of participants contributing to the mean.

ArmMeasureGroupValue (MEAN)Dispersion
Schedule A - CP-870893 0.1 mg/kgChange in Bone Marrow Derived Cells (B Cell) Surface Markers: CD19 Pre-dose Percentage (PD0), Maximum Post-dose Percentage (PDmax)PD05.81 percentage of cellsStandard Deviation 1.4284
Schedule A - CP-870893 0.1 mg/kgChange in Bone Marrow Derived Cells (B Cell) Surface Markers: CD19 Pre-dose Percentage (PD0), Maximum Post-dose Percentage (PDmax)PDMAX4.99 percentage of cellsStandard Deviation 0.9758
Schedule A - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD19 Pre-dose Percentage (PD0), Maximum Post-dose Percentage (PDmax)PD09.12 percentage of cellsStandard Deviation 5.2037
Schedule A - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD19 Pre-dose Percentage (PD0), Maximum Post-dose Percentage (PDmax)PDMAX7.3017 percentage of cellsStandard Deviation 5.1317
Schedule A - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD19 Pre-dose Percentage (PD0), Maximum Post-dose Percentage (PDmax)PD011.3257 percentage of cellsStandard Deviation 6.1987
Schedule A - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD19 Pre-dose Percentage (PD0), Maximum Post-dose Percentage (PDmax)PDMAX9.4614 percentage of cellsStandard Deviation 5.0745
Schedule B - CP-870893 0.1 mg/kgChange in Bone Marrow Derived Cells (B Cell) Surface Markers: CD19 Pre-dose Percentage (PD0), Maximum Post-dose Percentage (PDmax)PD013.5233 percentage of cellsStandard Deviation 13.8885
Schedule B - CP-870893 0.1 mg/kgChange in Bone Marrow Derived Cells (B Cell) Surface Markers: CD19 Pre-dose Percentage (PD0), Maximum Post-dose Percentage (PDmax)PDMAX6.7133 percentage of cellsStandard Deviation 3.8467
Schedule B - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD19 Pre-dose Percentage (PD0), Maximum Post-dose Percentage (PDmax)PD09.42 percentage of cellsStandard Deviation 5.1037
Schedule B - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD19 Pre-dose Percentage (PD0), Maximum Post-dose Percentage (PDmax)PDMAX7.7783 percentage of cellsStandard Deviation 4.4316
Schedule B - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD19 Pre-dose Percentage (PD0), Maximum Post-dose Percentage (PDmax)PD06.5514 percentage of cellsStandard Deviation 3.3797
Schedule B - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD19 Pre-dose Percentage (PD0), Maximum Post-dose Percentage (PDmax)PDMAX4.6786 percentage of cellsStandard Deviation 2.9114
Secondary

Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD23 PD0, PDmax

Assess activity of B cells in the presence of CP-870893. CD23 is a low-affinity receptor that has a role in transportation in antibody feedback regulation. Agents that engage CD40 have been reported to increase CD23 expression; increased CD23 expression may, therefore, serve as a marker for CD40 binding by CP-870893. Higher numbers may indicate a potential for increased antibody response. Percentage of cells reported as the mean of the pre-dose values and the mean of the maximum post-dose values to show change.

Time frame: Schedule A Cycle 1 / Day 3 and Schedule B Cycle 1 / Day 8: predose, 6, 24, and 48 hours postdose

Population: Biomarker data analysis set; N=Number of participants contributing to the mean.

ArmMeasureGroupValue (MEAN)Dispersion
Schedule A - CP-870893 0.1 mg/kgChange in Bone Marrow Derived Cells (B Cell) Surface Markers: CD23 PD0, PDmaxPD071.155 percentage of cellsStandard Deviation 16.3554
Schedule A - CP-870893 0.1 mg/kgChange in Bone Marrow Derived Cells (B Cell) Surface Markers: CD23 PD0, PDmaxPDMAX22.155 percentage of cellsStandard Deviation 14.2765
Schedule A - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD23 PD0, PDmaxPD086.2267 percentage of cellsStandard Deviation 8.7526
Schedule A - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD23 PD0, PDmaxPDMAX36.735 percentage of cellsStandard Deviation 30.9453
Schedule A - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD23 PD0, PDmaxPD080.4843 percentage of cellsStandard Deviation 14.5377
Schedule A - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD23 PD0, PDmaxPDMAX20.0857 percentage of cellsStandard Deviation 8.1089
Schedule B - CP-870893 0.1 mg/kgChange in Bone Marrow Derived Cells (B Cell) Surface Markers: CD23 PD0, PDmaxPD090.2333 percentage of cellsStandard Deviation 5.0997
Schedule B - CP-870893 0.1 mg/kgChange in Bone Marrow Derived Cells (B Cell) Surface Markers: CD23 PD0, PDmaxPDMAX7.58 percentage of cellsStandard Deviation 4.865
Schedule B - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD23 PD0, PDmaxPD085.26 percentage of cellsStandard Deviation 5.2701
Schedule B - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD23 PD0, PDmaxPDMAX22.3183 percentage of cellsStandard Deviation 17.2221
Schedule B - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD23 PD0, PDmaxPD083.0943 percentage of cellsStandard Deviation 8.7534
Schedule B - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD23 PD0, PDmaxPDMAX33.3057 percentage of cellsStandard Deviation 24.057
Secondary

Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD40 PD0, PDmax

Assess activity of B cells in the presence of CP-870893. CD40 is a costimulatory protein and is a target for CP-870893. Measurement of CD40 on white blood cells provides a measure of target modulation by CP-870893. Higher numbers may indicate potential for increased activation of antigen presenting cells. Percentage of cells reported as the mean of the pre-dose values and the mean of the maximum post-dose values to show change.

Time frame: Schedule A Cycle 1 / Day 3 and Schedule B Cycle 1 / Day 8: predose, 6, 24, and 48 hours postdose

Population: Biomarker data analysis set; N=Number of participants contributing to the mean.

ArmMeasureGroupValue (MEAN)Dispersion
Schedule A - CP-870893 0.1 mg/kgChange in Bone Marrow Derived Cells (B Cell) Surface Markers: CD40 PD0, PDmaxPD099.265 percentage of cellsStandard Deviation 0.7566
Schedule A - CP-870893 0.1 mg/kgChange in Bone Marrow Derived Cells (B Cell) Surface Markers: CD40 PD0, PDmaxPDMAX6.615 percentage of cellsStandard Deviation 8.2237
Schedule A - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD40 PD0, PDmaxPD099.8267 percentage of cellsStandard Deviation 0.2447
Schedule A - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD40 PD0, PDmaxPDMAX11.7883 percentage of cellsStandard Deviation 17.846
Schedule A - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD40 PD0, PDmaxPD099.0043 percentage of cellsStandard Deviation 1.4442
Schedule A - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD40 PD0, PDmaxPDMAX13.6929 percentage of cellsStandard Deviation 27.7995
Schedule B - CP-870893 0.1 mg/kgChange in Bone Marrow Derived Cells (B Cell) Surface Markers: CD40 PD0, PDmaxPD099.9833 percentage of cellsStandard Deviation 0.0289
Schedule B - CP-870893 0.1 mg/kgChange in Bone Marrow Derived Cells (B Cell) Surface Markers: CD40 PD0, PDmaxPDMAX0.65 percentage of cellsStandard Deviation 0.6497
Schedule B - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD40 PD0, PDmaxPD099.6533 percentage of cellsStandard Deviation 0.4772
Schedule B - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD40 PD0, PDmaxPDMAX18.9517 percentage of cellsStandard Deviation 38.0439
Schedule B - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD40 PD0, PDmaxPD088.07 percentage of cellsStandard Deviation 28.0802
Schedule B - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD40 PD0, PDmaxPDMAX12.6514 percentage of cellsStandard Deviation 26.8913
Secondary

Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD54 PD0, PDmax

Assess activity of B cells in presence of CP-870893. CD54 is an intercellular adhesion molecule. When activated, leukocytes bind to endothelial cells via CD54 and then transmigrate into tissues. Agents that engage CD40 have been reported to increase CD54 expression; increased CD54 expression may, therefore, serve as a marker for CD40 binding by CP-870893. Higher numbers may indicate potential for increased immune response. Percentage of cells reported as the mean of the pre-dose values and the mean of the maximum post-dose values to show change.

Time frame: Schedule A Cycle 1 / Day 3 and Schedule B Cycle 1 / Day 8: predose, 6, 24, and 48 hours postdose

Population: Biomarker data analysis set; N=Number of participants contributing to the mean.

ArmMeasureGroupValue (MEAN)Dispersion
Schedule A - CP-870893 0.1 mg/kgChange in Bone Marrow Derived Cells (B Cell) Surface Markers: CD54 PD0, PDmaxPD095.735 percentage of cellsStandard Deviation 5.8902
Schedule A - CP-870893 0.1 mg/kgChange in Bone Marrow Derived Cells (B Cell) Surface Markers: CD54 PD0, PDmaxPDMAX28.505 percentage of cellsStandard Deviation 32.0532
Schedule A - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD54 PD0, PDmaxPD094.7667 percentage of cellsStandard Deviation 9.0938
Schedule A - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD54 PD0, PDmaxPDMAX25.85 percentage of cellsStandard Deviation 25.9993
Schedule A - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD54 PD0, PDmaxPD097.9486 percentage of cellsStandard Deviation 0.8686
Schedule A - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD54 PD0, PDmaxPDMAX23.5229 percentage of cellsStandard Deviation 15.4014
Schedule B - CP-870893 0.1 mg/kgChange in Bone Marrow Derived Cells (B Cell) Surface Markers: CD54 PD0, PDmaxPD099.6367 percentage of cellsStandard Deviation 0.3465
Schedule B - CP-870893 0.1 mg/kgChange in Bone Marrow Derived Cells (B Cell) Surface Markers: CD54 PD0, PDmaxPDMAX1.7 percentage of cellsStandard Deviation 1.5156
Schedule B - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD54 PD0, PDmaxPD096.4867 percentage of cellsStandard Deviation 3.771
Schedule B - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD54 PD0, PDmaxPDMAX33.2017 percentage of cellsStandard Deviation 33.3072
Schedule B - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD54 PD0, PDmaxPD094.5571 percentage of cellsStandard Deviation 2.9589
Schedule B - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD54 PD0, PDmaxPDMAX21.1886 percentage of cellsStandard Deviation 33.3022
Secondary

Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD86 PD0, PDmax

Assess activity of B cells in presence of CP-870893. CD86 is a protein expressed on antigen-presenting cells and provides co-stimulatory signals for T cell (role in cell-modulated immunity) activation. Agents that engage CD40 have been reported to increase CD86 expression; increased CD86 expression may, therefore, serve as a marker for CD40 binding by CP-870893. Higher numbers may indicate potential for increased immune response. Percentage of cells reported as the mean of the pre-dose values and the mean of the maximum post-dose values to show change.

Time frame: Schedule A Cycle 1 / Day 3 and Schedule B Cycle 1 / Day 8: predose, 6, 24, and 48 hours postdose

Population: Biomarker data analysis set; N=Number of participants contributing to the mean.

ArmMeasureGroupValue (MEAN)Dispersion
Schedule A - CP-870893 0.1 mg/kgChange in Bone Marrow Derived Cells (B Cell) Surface Markers: CD86 PD0, PDmaxPD03.91 percentage of cellsStandard Deviation 0.4384
Schedule A - CP-870893 0.1 mg/kgChange in Bone Marrow Derived Cells (B Cell) Surface Markers: CD86 PD0, PDmaxPDMAX12.795 percentage of cellsStandard Deviation 3.0618
Schedule A - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD86 PD0, PDmaxPD05.8167 percentage of cellsStandard Deviation 3.4037
Schedule A - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD86 PD0, PDmaxPDMAX26.275 percentage of cellsStandard Deviation 23.1242
Schedule A - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD86 PD0, PDmaxPD018.7629 percentage of cellsStandard Deviation 8.2298
Schedule A - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD86 PD0, PDmaxPDMAX11.9443 percentage of cellsStandard Deviation 10.314
Schedule B - CP-870893 0.1 mg/kgChange in Bone Marrow Derived Cells (B Cell) Surface Markers: CD86 PD0, PDmaxPD05.5367 percentage of cellsStandard Deviation 4.4152
Schedule B - CP-870893 0.1 mg/kgChange in Bone Marrow Derived Cells (B Cell) Surface Markers: CD86 PD0, PDmaxPDMAX18.04 percentage of cellsStandard Deviation 19.9811
Schedule B - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD86 PD0, PDmaxPD09.23 percentage of cellsStandard Deviation 5.1565
Schedule B - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD86 PD0, PDmaxPDMAX28.0917 percentage of cellsStandard Deviation 16.5569
Schedule B - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD86 PD0, PDmaxPD016.7186 percentage of cellsStandard Deviation 5.4602
Schedule B - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: CD86 PD0, PDmaxPDMAX34.3943 percentage of cellsStandard Deviation 18.5593
Secondary

Change in Bone Marrow Derived Cells (B Cell) Surface Markers: Human Leukocyte Antigen (HLA-DR) PD0, PDmax

Assess activity of B cells in presence of CP-870893. HLA-DR is a component of the Major Histocompatibility Complex in humans and presents antigens for recognition by the immune system. Agents that engage CD40 have been reported to increase HLA-DR expression; increased HLA-DR expression may serve as a marker for CD40 binding by CP-870893. Positive values may indicate greater presence of cells associated with potential for antibody production. Percentage of cells reported as the mean of the pre-dose values and the mean of the maximum post-dose values to show change.

Time frame: Schedule A Cycle 1 / Day 3 and Schedule B Cycle 1 / Day 8: predose, 6, 24, and 48 hours postdose

Population: Biomarker data analysis set; N=Number of participants contributing to the mean.

ArmMeasureGroupValue (MEAN)Dispersion
Schedule A - CP-870893 0.1 mg/kgChange in Bone Marrow Derived Cells (B Cell) Surface Markers: Human Leukocyte Antigen (HLA-DR) PD0, PDmaxPD098.24 percentage of cellsStandard Deviation 2.1355
Schedule A - CP-870893 0.1 mg/kgChange in Bone Marrow Derived Cells (B Cell) Surface Markers: Human Leukocyte Antigen (HLA-DR) PD0, PDmaxPDMAX33.88 percentage of cellsStandard Deviation 38.3818
Schedule A - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: Human Leukocyte Antigen (HLA-DR) PD0, PDmaxPD098.325 percentage of cellsStandard Deviation 1.9341
Schedule A - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: Human Leukocyte Antigen (HLA-DR) PD0, PDmaxPDMAX27.4983 percentage of cellsStandard Deviation 24.3301
Schedule A - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: Human Leukocyte Antigen (HLA-DR) PD0, PDmaxPD099.0986 percentage of cellsStandard Deviation 0.4929
Schedule A - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: Human Leukocyte Antigen (HLA-DR) PD0, PDmaxPDMAX21.7857 percentage of cellsStandard Deviation 12.1245
Schedule B - CP-870893 0.1 mg/kgChange in Bone Marrow Derived Cells (B Cell) Surface Markers: Human Leukocyte Antigen (HLA-DR) PD0, PDmaxPD099.7833 percentage of cellsStandard Deviation 0.2021
Schedule B - CP-870893 0.1 mg/kgChange in Bone Marrow Derived Cells (B Cell) Surface Markers: Human Leukocyte Antigen (HLA-DR) PD0, PDmaxPDMAX2.7833 percentage of cellsStandard Deviation 2.501
Schedule B - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: Human Leukocyte Antigen (HLA-DR) PD0, PDmaxPD097.4 percentage of cellsStandard Deviation 3.4616
Schedule B - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: Human Leukocyte Antigen (HLA-DR) PD0, PDmaxPDMAX15.1783 percentage of cellsStandard Deviation 20.54
Schedule B - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: Human Leukocyte Antigen (HLA-DR) PD0, PDmaxPD098.5643 percentage of cellsStandard Deviation 1.8466
Schedule B - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Bone Marrow Derived Cells (B Cell) Surface Markers: Human Leukocyte Antigen (HLA-DR) PD0, PDmaxPDMAX27.0986 percentage of cellsStandard Deviation 33.2939
Secondary

Change in Cytokine Concentrations of Interleukin 6 (IL 6): Pre-dose Concentration (CYTO0), Maximum Post-dose Concentration (CYTOMAX)

Concentrations reported as the mean of the pre-dose values and the mean of the maximum post-dose values to show change. An increase in values indicates greater cytokine release from cells targeted by the antibody and may be associated with an infusion reaction.

Time frame: Schedule A Cycle 1 / Day 3 and Schedule B Cycle 1 / Day 8: predose, end of infusion, 1 , 2, 4, 6, 24, and 48 hours postdose

Population: Pharmacokinetic data analysis set.

ArmMeasureGroupValue (MEAN)Dispersion
Schedule A - CP-870893 0.1 mg/kgChange in Cytokine Concentrations of Interleukin 6 (IL 6): Pre-dose Concentration (CYTO0), Maximum Post-dose Concentration (CYTOMAX)CYTO010.57 picograms per milliliter (pg/mL)Standard Deviation 5.8106
Schedule A - CP-870893 0.1 mg/kgChange in Cytokine Concentrations of Interleukin 6 (IL 6): Pre-dose Concentration (CYTO0), Maximum Post-dose Concentration (CYTOMAX)CYTOMAX120.67 picograms per milliliter (pg/mL)Standard Deviation 92.5545
Schedule A - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Cytokine Concentrations of Interleukin 6 (IL 6): Pre-dose Concentration (CYTO0), Maximum Post-dose Concentration (CYTOMAX)CYTO012.10 picograms per milliliter (pg/mL)Standard Deviation 9.5896
Schedule A - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Cytokine Concentrations of Interleukin 6 (IL 6): Pre-dose Concentration (CYTO0), Maximum Post-dose Concentration (CYTOMAX)CYTOMAX275.48 picograms per milliliter (pg/mL)Standard Deviation 427.617
Schedule A - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Cytokine Concentrations of Interleukin 6 (IL 6): Pre-dose Concentration (CYTO0), Maximum Post-dose Concentration (CYTOMAX)CYTO014.52 picograms per milliliter (pg/mL)Standard Deviation 14.674
Schedule A - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Cytokine Concentrations of Interleukin 6 (IL 6): Pre-dose Concentration (CYTO0), Maximum Post-dose Concentration (CYTOMAX)CYTOMAX371.22 picograms per milliliter (pg/mL)Standard Deviation 379.799
Schedule B - CP-870893 0.1 mg/kgChange in Cytokine Concentrations of Interleukin 6 (IL 6): Pre-dose Concentration (CYTO0), Maximum Post-dose Concentration (CYTOMAX)CYTO03.547 picograms per milliliter (pg/mL)Standard Deviation 0.739
Schedule B - CP-870893 0.1 mg/kgChange in Cytokine Concentrations of Interleukin 6 (IL 6): Pre-dose Concentration (CYTO0), Maximum Post-dose Concentration (CYTOMAX)CYTOMAX113.45 picograms per milliliter (pg/mL)Standard Deviation 42.1629
Schedule B - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Cytokine Concentrations of Interleukin 6 (IL 6): Pre-dose Concentration (CYTO0), Maximum Post-dose Concentration (CYTOMAX)CYTO041.34 picograms per milliliter (pg/mL)Standard Deviation 72.595
Schedule B - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Cytokine Concentrations of Interleukin 6 (IL 6): Pre-dose Concentration (CYTO0), Maximum Post-dose Concentration (CYTOMAX)CYTOMAX339.00 picograms per milliliter (pg/mL)Standard Deviation 185.14
Schedule B - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Cytokine Concentrations of Interleukin 6 (IL 6): Pre-dose Concentration (CYTO0), Maximum Post-dose Concentration (CYTOMAX)CYTO08.040 picograms per milliliter (pg/mL)Standard Deviation 6.6632
Schedule B - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Cytokine Concentrations of Interleukin 6 (IL 6): Pre-dose Concentration (CYTO0), Maximum Post-dose Concentration (CYTOMAX)CYTOMAX679.40 picograms per milliliter (pg/mL)Standard Deviation 856.849
Secondary

Change in Cytokine Concentrations of Tumor Necrosis Factor Alpha (TNF Alpha): CYTO0, CYTOMAX

Concentrations reported as the mean of the pre-dose values and the mean of the maximum post-dose values to show change. An increase in values indicates greater cytokine release from cells targeted by the antibody and may be associated with an infusion reaction.

Time frame: Schedule A Cycle 1 / Day 3 and Schedule B Cycle 1 / Day 8: predose, end of infusion, 1 , 2, 4, 6, 24, and 48 hours postdose

Population: Pharmacokinetic data analysis set. CYTO0 values = the lower limit of quantitation (LLOQ).

ArmMeasureGroupValue (MEAN)Dispersion
Schedule A - CP-870893 0.1 mg/kgChange in Cytokine Concentrations of Tumor Necrosis Factor Alpha (TNF Alpha): CYTO0, CYTOMAXCYTO015.60 pg/mLStandard Deviation 0
Schedule A - CP-870893 0.1 mg/kgChange in Cytokine Concentrations of Tumor Necrosis Factor Alpha (TNF Alpha): CYTO0, CYTOMAXCYTOMAX155.73 pg/mLStandard Deviation 151.527
Schedule A - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Cytokine Concentrations of Tumor Necrosis Factor Alpha (TNF Alpha): CYTO0, CYTOMAXCYTO015.60 pg/mLStandard Deviation 0
Schedule A - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Cytokine Concentrations of Tumor Necrosis Factor Alpha (TNF Alpha): CYTO0, CYTOMAXCYTOMAX108.90 pg/mLStandard Deviation 148.896
Schedule A - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Cytokine Concentrations of Tumor Necrosis Factor Alpha (TNF Alpha): CYTO0, CYTOMAXCYTO015.60 pg/mLStandard Deviation 0
Schedule A - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Cytokine Concentrations of Tumor Necrosis Factor Alpha (TNF Alpha): CYTO0, CYTOMAXCYTOMAX113.11 pg/mLStandard Deviation 75.427
Schedule B - CP-870893 0.1 mg/kgChange in Cytokine Concentrations of Tumor Necrosis Factor Alpha (TNF Alpha): CYTO0, CYTOMAXCYTO015.60 pg/mLStandard Deviation 0
Schedule B - CP-870893 0.1 mg/kgChange in Cytokine Concentrations of Tumor Necrosis Factor Alpha (TNF Alpha): CYTO0, CYTOMAXCYTOMAX212.73 pg/mLStandard Deviation 166.857
Schedule B - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Cytokine Concentrations of Tumor Necrosis Factor Alpha (TNF Alpha): CYTO0, CYTOMAXCYTO015.60 pg/mLStandard Deviation 0
Schedule B - CP-870893 0.2 mg/kg (Escalation Cohort)Change in Cytokine Concentrations of Tumor Necrosis Factor Alpha (TNF Alpha): CYTO0, CYTOMAXCYTOMAX161.90 pg/mLStandard Deviation 196.651
Schedule B - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Cytokine Concentrations of Tumor Necrosis Factor Alpha (TNF Alpha): CYTO0, CYTOMAXCYTO015.60 pg/mLStandard Deviation 0
Schedule B - CP-870893 0.2 mg/kg (Expansion Cohort)Change in Cytokine Concentrations of Tumor Necrosis Factor Alpha (TNF Alpha): CYTO0, CYTOMAXCYTOMAX675.34 pg/mLStandard Deviation 1263.56
Secondary

Maximum Observed Serum Concentration (Cmax)

Mean of individual observed Cmax values measured as micrograms per milliliter (mcg/mL).

Time frame: Schedule A Day 3 of each 21 Day Cycle, Schedule B Day 8 of each 21 Day Cycle: Pre-dose, 5 minutes after end of infusion, and 2, 6, and 24 hours (hrs) post-dose up to a maximum of 8 cycles (6 months)

Population: Pharmacokinetic data analysis set: all enrolled participants who started treatment and had baseline and sufficient on-study samples to provide interpretable results. N=number of participants who did not have pre-dose levels of CP-870893.

ArmMeasureValue (MEAN)Dispersion
Schedule A - CP-870893 0.1 mg/kgMaximum Observed Serum Concentration (Cmax)0.97 mcg/mLStandard Deviation 0.43
Schedule A - CP-870893 0.2 mg/kg (Escalation Cohort)Maximum Observed Serum Concentration (Cmax)1.51 mcg/mLStandard Deviation 0.6
Schedule A - CP-870893 0.2 mg/kg (Expansion Cohort)Maximum Observed Serum Concentration (Cmax)1.36 mcg/mLStandard Deviation 0.68
Schedule B - CP-870893 0.1 mg/kgMaximum Observed Serum Concentration (Cmax)0.61 mcg/mL
Schedule B - CP-870893 0.2 mg/kg (Escalation Cohort)Maximum Observed Serum Concentration (Cmax)1.97 mcg/mLStandard Deviation 0.99
Schedule B - CP-870893 0.2 mg/kg (Expansion Cohort)Maximum Observed Serum Concentration (Cmax)1.06 mcg/mLStandard Deviation 0.42
Secondary

Total and Neutralizing Human Antihuman Antibody (HAHA) Titer

HAHA assessed as an indicator of immunogenicity to CP-870893.

Time frame: Schedule A Day 3 of each 21 Day Cycle, Schedule B Day 8 of each 21 Day Cycle: Pre-dose up to a maximum of 8 cycles (6 months)

Population: Data was not summarized as Human antihuman responses to CP-870893 were all below the limit of quantitation (endpoint titer of 4.32).

Secondary

Tumor Response of Partial Response (PR) and Complete Response CR) According to Response Evaluation Criteria in Solid Tumors (RECIST)

Number of participants with objective response based assessment of confirmed complete response (CR) or confirmed partial response (PR) according to RECIST. Confirmed responses are those that persist on repeat imaging study at least 4 weeks after initial documentation of response. CR was defined as the disappearance of all target and nontarget lesions. PR was defined as a ≥30% decrease in the sum of the longest dimensions (LD) of the target lesions taking as a reference the baseline sum LD.

Time frame: Schedule A and Schedule B: Baseline and Day 21 of every even numbered cycle up to a maximum of 8 cycles (6 months)

Population: All response-evaluable population: included all participants who had measurable disease, a baseline tumor assessment and who started treatment were considered evaluable for analysis of tumor response.

ArmMeasureGroupValue (NUMBER)
Schedule A - CP-870893 0.1 mg/kgTumor Response of Partial Response (PR) and Complete Response CR) According to Response Evaluation Criteria in Solid Tumors (RECIST)Complete response0 participants
Schedule A - CP-870893 0.1 mg/kgTumor Response of Partial Response (PR) and Complete Response CR) According to Response Evaluation Criteria in Solid Tumors (RECIST)Partial response2 participants
Schedule A - CP-870893 0.2 mg/kg (Escalation Cohort)Tumor Response of Partial Response (PR) and Complete Response CR) According to Response Evaluation Criteria in Solid Tumors (RECIST)Complete response0 participants
Schedule A - CP-870893 0.2 mg/kg (Escalation Cohort)Tumor Response of Partial Response (PR) and Complete Response CR) According to Response Evaluation Criteria in Solid Tumors (RECIST)Partial response3 participants

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026