Trial results from RUBY Part 1

NCCN recommendation category 1 preferred option icon

Dostarlimab-gxly (JEMPERLI) in combination with carboplatin-paclitaxel is included in the NCCN Clinical Practice Guidelines in Oncology (NCCN Guidelines®) as an NCCN Category 1 preferred treatment option for primary or adjuvant therapy for stage III-IV* endometrial carcinoma and as an NCCN Category 1 preferred first-line therapy option for recurrent endometrial carcinoma.1

  • Category 1 – Based upon high-level evidence, there is uniform NCCN consensus that the intervention is appropriate. 1
  • * For stage IIIA, IIIB, or IIIC1 with measurable disease, stage IIIC1 with carcinosarcoma, clear-cell, serous, or mixed histology regardless of the presence of measurable disease, and stage IIIC2 or stage IV regardless of the presence of measurable disease. 1
  • NCCN=National Comprehensive Cancer Network.

In All-Comers With Primary Advanced or Recurrent EC

At 3+ years, JEMPERLI + CP has the longest median follow-up for an FDA-approved immunotherapy combination to date2-7

RUBY study design infographic
  • All-comers is defined as the overall population with primary advanced or recurrent EC.
  • Median duration of follow-up, defined as time from randomization to data cutoff, was 37.2 months (cutoff date September 22, 2023).7
  • Randomization was stratified by MMR/MSI status, prior external pelvic radiotherapy, and disease status (recurrent, primary Stage III, or primary Stage IV).2
  • §Treatment continued until disease progression, unacceptable toxicity, or a maximum of 3 years.2
  • PFS assessed by the investigator according to RECIST v1.1.2
  • AUC=area under the curve; CP=carboplatin-paclitaxel; dMMR=mismatch repair deficient; DOR=duration of response; EC=endometrial cancer; IV=intravenous; MMR=mismatch repair; MMRp=mismatch repair proficient; MSI=microsatellite instability; MSI-H=microsatellite instability-high; MSS=microsatellite stable; ORR=objective response rate; OS=overall survival; PFS=progression-free survival; Q3W=every 3 weeks; Q6W=every 6 weeks; RECIST v1.1=Response Evaluation Criteria in Solid Tumors v1.1.

In Primary Advanced or Recurrent EC

RUBY Part 1 included patients with broad disease characteristics2,8

Primary FIGO Stage III or Stage IV disease, including patients with more aggressive histologies such as carcinosarcoma (9%) and serous adenocarcinoma (21%)2,8-10

Measurable Disease2
Stage IIIA-IIIC1
Measurable ​ or Non-Measurable Disease2
Stage IIIC1 patients with carcinosarcoma, clear cell, serous, or mixed histology  
(≥10% carcinosarcoma, clear cell, or serous histology)
Stage IIIC2 or IV

First recurrent endometrial cancer with a low potential for cure by radiation therapy or surgery alone or in combination, including those2:

  • Naïve to systemic anticancer therapy
  • Who had received prior neoadjuvant/adjuvant systemic anticancer therapy and who had a recurrence or disease progression ≥6 months after completing treatment (first recurrence)

All patients were anti–PD-1/L1/L2 naïve.11

  • Measurable or evaluable by RECIST v1.1.2

FIGO=International Federation of Gynecology and Obstetrics; PD-1=programmed death receptor 1; PD-L1/2=programmed death receptor ligand 1/2.​

RUBY Part 1 included patients with diverse disease characteristics (N=494)2,8

RUBY patient baseline characteristics infographic
All comers icon

Major Endpoint

16-Month improvement in median overall survival vs CP alone2

Statistically significant 31% reduction in the risk of death with JEMPERLI + CP vs CP alone2

RUBY Overall Survival KM Curve in All-Comers

Estimated Kaplan-Meier probability of OS at 24 months was 70.1% (95% CI: 63.8, 75.5) with JEMPERLI + CP and 54.3% (95% CI: 47.8, 60.3) with CP alone7

  • Data cutoff September 22, 2023.7
  • # Based on stratified Cox regression model.2
  • ** One-sided P-value based on stratified log-rank test was statistically significant.2
All comers icon

Major Endpoint

~1-Year median PFS in a population that included those with aggressive histologies2,8-10

Statistically significant 36% reduction in the risk of progression or death with JEMPERLI + CP vs CP alone2

RUBY Progression-free Survival KM Curve in All-Comers
  • Data cutoff September 28, 2022.8
  • # Based on stratified Cox regression model.2
  • ** One-sided P-value based on stratified log-rank test was statistically significant.2

Review the data for the major efficacy endpoint of PFS in the dMMR/MSI-H subgroup

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All comers icon

Additional Endpoints

ORR and DOR with JEMPERLI + CP vs CP alone2​​††

ORR and DOR after 25.4-months median follow-up8‡‡

RUBY ORR and DOR results in all-comers

 

  • Median DOR with JEMPERLI + CP was 10.8 months (range: 1.3+, 28.9+) compared with 6.4 months (range: 1.4+, 27.2+) with CP alone2​​§§
  • Data cutoff September 22, 2022.8
  • †† Confirmed responses as assessed by investigator according to RECIST v1.1.2
  • ‡‡ Median duration of follow-up is defined as time from randomization to data cutoff.8
  • §§ For patients with a confirmed partial or complete response.2
dMMR/MSI-H icon

Major Endpoint

~2-Year improvement (22.6 months) in median PFS vs CP alone2

Groundbreaking 71% reduction in the risk of progression or death with JEMPERLI + CP vs CP alone2

RUBY Progression-free Survival KM Curve in dMMR/MSI-H-subgroup
  • Data cutoff September 28, 2022.8
  • #Based on stratified Cox regression model.2
  • ** One-sided P-value based on stratified log-rank test was statistically significant.2
dMMR/MSI-H icon

Exploratory Analysis

Median OS was not reached with JEMPERLI + CP and 30.8 months with CP alone2,12

The prespecified exploratory analysis for OS was not powered to detect treatment differences; results are descriptive2

RUBY Overall Survival KM Curve in dMMR/MSI-H subgroup

Estimated Kaplan-Meier probability of OS at 24 months was 81.4% (95% CI: 68.9, 89.2) with JEMPERLI + CP and 53.6% (95% CI: 40.3, 65.3) with CP alone12

  • Data cutoff September 22, 2023.7
  • #Based on stratified Cox regression model.2
dMMR/MSI-H icon

Additional Endpoints

ORR and DOR with JEMPERLI + CP vs CP alone2††

ORR and DOR after 24.9-months median follow-up12‡‡

RUBY ORR and DOR results in dMMR/MSI-H subgroup
  • Median DOR was not reached (range: 3.4, 28.3+) with JEMPERLI + CP compared with 5.4 months (range: 2.7, 27.2+) with CP alone2§§
  • Data cutoff September 28, 2022.12
  • †† Confirmed responses as assessed by investigator according to RECIST v1.1.2
  • ‡‡ Median duration of follow-up is defined as time from randomization to data cutoff.8
  • §§ For patients with a confirmed partial or complete response.2
MMRp/MSS icon

Exploratory Analyses

4-Month improvement in OS observed with JEMPERLI + CP2,12

The prespecified exploratory analyses for OS and PFS were not powered to detect treatment differences; results are descriptive2

RUBY OS KM curve in MMRp/MSS subgroup
  • 76% of patients in the overall population had MMRp/MSS biomarker status (n=372)2

PFS Analysis

Median PFS was 9.8 months (95% CI: 9.0, 12.6) for JEMPERLI + CP (n=185) vs 7.9 months (95% CI: 7.6, 9.8) for CP alone (n=187), and HR=0.78 (95% CI: 0.60, 1.00)2

  • OS data cutoff September 22, 2023.7
  • PFS data cutoff September 28, 2022.8

Discover the appropriate patient types who may benefit from JEMPERLI + CP

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