LB-100 + Chemotherapy + Immunotherapy for Small Cell Lung Cancer

Age: 18+

Sex: Any

Trial Phase: Phase 1

Sponsor: City of Hope Medical Center

Must not be taking: Corticosteroids, Antiepileptics, Warfarin, others

Disqualifiers: NSCLC, Cardiac condition, CNS metastases, others

No Placebo Group All trial participants will receive the active study treatment (no placebo)

Breakthrough Therapy This drug has been fast-tracked for approval by the FDA given its high promise

Compensation: Varies

Number of Visits: 4

3 Participants Needed

Trial Summary

What is the purpose of this trial?

This phase Ib trial studies the side effects and best dose of LB-100 when given together with carboplatin, etoposide, and atezolizumab for the treatment of untreated extensive-stage small cell lung cancer. Drugs such as carboplatin and etoposide work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Immunotherapy with monoclonal antibodies, such as atezolizumab, may help the body's immune system attack the cancer, and may interfere with the ability of tumor cells to grow and spread. LB-100 has been shown to make anticancer drugs (chemotherapy) work better at killing cancer. LB-100 blocks a protein on the surface of cells called PP2A. Blocking this protein makes the tumor cells that express PP2A divide. This allows standard chemotherapy drugs such as carboplatin, etoposide, and atezolizumab work better at killing the tumor cells since these drugs work best at destroying cells that are dividing. Giving LB-100 in combination with standard chemotherapy drugs may work better to treat extensive-stage small cell lung cancer compared to standard chemotherapy drugs alone.

Will I have to stop taking my current medications?

The trial requires stopping certain medications before starting, such as those that prolong the QT interval, nephrotoxic compounds, warfarin, certain antiepileptic drugs, and strong P-glycoprotein inhibitors, at least 7 days before the first dose. If you are on any of these, you may need to stop or switch them.

What data supports the effectiveness of the drug combination LB-100, Atezolizumab, Carboplatin, and Etoposide for treating small cell lung cancer?

Research shows that adding atezolizumab to carboplatin and etoposide significantly improves survival in patients with extensive-stage small cell lung cancer compared to chemotherapy alone, making it a valuable treatment option. ^{1 2 3 4 5}

Is the combination of LB-100, chemotherapy, and immunotherapy safe for treating small cell lung cancer?

The combination of atezolizumab (an immunotherapy drug), carboplatin, and etoposide (both chemotherapy drugs) has been generally well tolerated in patients with small cell lung cancer, with no new safety concerns beyond those known for the individual drugs. Common side effects include blood-related issues, skin rash, and thyroid problems, but it did not negatively affect patients' quality of life. ^{1 6 7 8 9}

What makes the drug combination of LB-100, atezolizumab, carboplatin, and etoposide unique for small cell lung cancer?

This drug combination is unique because it includes atezolizumab, an immune checkpoint inhibitor, which is added to the standard chemotherapy drugs carboplatin and etoposide. Atezolizumab helps the immune system recognize and attack cancer cells, and its addition has been shown to improve survival outcomes in patients with extensive-stage small cell lung cancer compared to chemotherapy alone. ^{1 8 10 11 12}

Research Team

Ravi Salgia

Principal Investigator

City of Hope Medical Center

Eligibility Criteria

This trial is for adults with untreated extensive-stage small cell lung cancer. Participants must have proper liver, kidney, and blood function, not be pregnant or breastfeeding, agree to use contraception if of childbearing potential, and have no prior treatments for SCLC. They should also have a life expectancy of at least 12 weeks and an ECOG performance status of 0-2.

Inclusion Criteria

My lung cancer is confirmed to be extensive-stage small cell type.

Your bilirubin levels must be within a certain range to be eligible.

I am a woman not able to have children, not pregnant, and not breastfeeding.

Exclusion Criteria

I have been diagnosed with congenital long QT syndrome.

I haven't taken any kidney-damaging drugs in the last week.

I have a history of lung scarring or inflammation but not due to radiation.

Timeline

Screening

Participants are screened for eligibility to participate in the trial

2-4 weeks

Induction

Patients receive LB-100, atezolizumab, carboplatin, and etoposide. Treatment repeats every 21 days for 4 cycles.

12 weeks

4 cycles, each with multiple visits for infusions

Maintenance

Patients receive LB-100 and atezolizumab. Cycles repeat every 21 days in the absence of disease progression or unacceptable toxicity.

Variable, based on disease progression

Follow-up

Participants are monitored for safety and effectiveness after treatment completion. Follow-up occurs every 6-8 weeks for those without disease progression.

Up to 2 years

Treatment Details

Interventions

• Atezolizumab
• Carboplatin
• Etoposide
• LB-100

Trial Overview The study tests the combination of LB-100 with standard chemotherapy drugs (carboplatin and etoposide) plus immunotherapy drug Atezolizumab. It aims to find the best dose of LB-100 that enhances the effectiveness of these drugs in killing tumor cells by blocking a protein called PP2A.

Participant Groups

Group I: Treatment (LB-100, carboplatin, etoposide, atezolizumab) Experimental Treatment 4 Interventions

INDUCTION: Patients receive LB-100 IV over 15 minutes on days 1 and 3, atezolizumab IV over 30-60 minutes on day 1, carboplatin IV over 30-60 minutes on day 1, and etoposide IV over 60 minutes on days 1-3. Treatment repeats every 21 days for 4 cycles in the absence of disease progression or unacceptable toxicity. MAINTENANCE: After completion of induction therapy, patients receive LB-100 IV over 15 minutes on days 1 and 3 and atezolizumab IV over 30 minutes on day 1. Cycles repeat every 21 days in the absence of disease progression or unacceptable toxicity.

Atezolizumab is already approved in United States, European Union for the following indications:

Approved in United States as Tecentriq for:

• Melanoma
• Hepatocellular carcinoma
• Small cell lung cancer
• Non-small cell lung cancer
• Urothelial carcinoma

Approved in European Union as Tecentriq for:

• Melanoma
• Hepatocellular carcinoma
• Small cell lung cancer
• Non-small cell lung cancer
• Urothelial carcinoma

Who Is Running the Clinical Trial?

City of Hope Medical Center

Lead Sponsor

Trials

614

Recruited

1,924,000+

National Cancer Institute (NCI)

Collaborator

Trials

14,080

Recruited

41,180,000+

Findings from Research

Atezolizumab, combined with carboplatin and etoposide, significantly improves overall survival and progression-free survival in patients with extensive-stage small cell lung cancer, based on data from the IMpower133 trial involving previously untreated patients.

The treatment regimen is generally well tolerated, with no new safety concerns identified, and it does not negatively impact patients' quality of life, making it a valuable first-line therapy option.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Atezolizumab: A Review in Extensive-Stage SCLC. Frampton, JE.[2021]

The combination of atezolizumab, a PD-L1 inhibitor, with platinum-based chemotherapy significantly improves overall survival in patients with extensive-stage small cell lung cancer compared to chemotherapy alone.

This research suggests that this combination therapy could become a new first-line treatment option for patients suffering from this aggressive form of lung cancer.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Study: Atezolizumab Improves Survival in SCLC. [2019]

In a study of 99 previously untreated patients with extensive disease small cell lung cancer (ED-SCLC), adding atezolizumab to the standard carboplatin and etoposide regimen significantly improved overall survival, extending it to 20.8 months compared to 12.1 months for those receiving carboplatin and etoposide alone.

While there was no significant difference in progression-free survival between the two treatment groups, certain subgroups (such as older patients, males, and those with better health status) showed particularly enhanced survival benefits from the addition of atezolizumab, indicating its potential for personalized treatment approaches.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Atezolizumab addition to platinum doublet: evaluating survival outcomes for patients with extensive disease small cell lung cancer. Kubo, S., Kobayashi, N., Matsumoto, H., et al.[2023]

In a study involving 403 patients with extensive-stage small-cell lung cancer, adding atezolizumab to carboplatin and etoposide significantly improved overall survival (OS) from 10.3 months to 12.3 months compared to placebo, indicating its efficacy as a first-line treatment.

The addition of atezolizumab showed a tolerable safety profile and provided benefits regardless of patients' PD-L1 or blood-based tumor mutational burden status, suggesting it can be effective across different patient biomarker profiles.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Updated Overall Survival and PD-L1 Subgroup Analysis of Patients With Extensive-Stage Small-Cell Lung Cancer Treated With Atezolizumab, Carboplatin, and Etoposide (IMpower133). Liu, SV., Reck, M., Mansfield, AS., et al.[2022]

A phase I trial presented in 2015 indicates that rovalpituzumab tesirine, an experimental antibody-drug conjugate, shows potential effectiveness against recurrent small cell lung cancer, a type of cancer with limited treatment options.

This trial highlights the promise of rovalpituzumab tesirine as a new therapeutic approach for patients suffering from this challenging form of lung cancer.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

ADC Shows Effectiveness in SCLC. [2015]

Atezolizumab significantly improved overall survival in patients with previously treated non-small-cell lung cancer compared to docetaxel, with median survival times of 13.8 months versus 9.6 months, respectively.

The safety profile of atezolizumab was favorable, with only 15% of patients experiencing grade 3 or 4 adverse events, compared to 43% in the docetaxel group, indicating it may be a safer treatment option.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Atezolizumab versus docetaxel in patients with previously treated non-small-cell lung cancer (OAK): a phase 3, open-label, multicentre randomised controlled trial. Rittmeyer, A., Barlesi, F., Waterkamp, D., et al.[2022]

In a study of 124 patients with treatment-naïve, metastatic nonsquamous PD-L1-positive non-small cell lung cancer, the combination of atezolizumab with carboplatin and nab-paclitaxel showed significantly improved overall survival (19.9 months) and progression-free survival (8.5 months) compared to carboplatin and nab-paclitaxel alone (14.8 months and 5.1 months, respectively).

While the combination therapy had a higher incidence of manageable adverse events like neutropenia and anemia, it still demonstrated a tolerable safety profile, suggesting it could be an effective first-line treatment option.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Carboplatin and nab-paclitaxel chemotherapy with or without atezolizumab as front-line management for treatment-naïve metastatic nonsquamous non-small cell lung cancer with PD-L1 staining: a retrospective study. Xu, B., Cheng, H., Li, K., et al.[2023]

The FDA approved atezolizumab, a PD-L1 inhibitor, in combination with carboplatin and etoposide as a first-line treatment for small cell lung cancer, highlighting its role in enhancing therapy options.

This approval was supported by the phase III IMpower133 trial, which demonstrated that the addition of atezolizumab significantly improved both overall survival and progression-free survival in patients.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

First-Line Atezolizumab OK'd for SCLC. [2020]

Atezolizumab significantly improves overall survival in patients with metastatic non-small cell lung cancer (mNSCLC), with median survival times of 13.8 months in the atezolizumab group compared to 9.6 months in the docetaxel group in the OAK trial.

The treatment has an acceptable safety profile, with common side effects including fatigue and decreased appetite, and serious immune-related adverse events occurring in a small percentage of patients.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

U.S. Food and Drug Administration Approval Summary: Atezolizumab for Metastatic Non-Small Cell Lung Cancer. Weinstock, C., Khozin, S., Suzman, D., et al.[2022]

Atezolizumab combined with chemotherapy showed promising efficacy in treating advanced, treatment-naïve non-small-cell lung cancer (NSCLC), with overall response rates of 36% to 68% across different chemotherapy regimens in a study of 76 patients.

The treatment was generally well tolerated, although common severe side effects included neutropenia and anemia, indicating a manageable safety profile for this combination therapy.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Long-term survival follow-up of atezolizumab in combination with platinum-based doublet chemotherapy in patients with advanced non-small-cell lung cancer. Liu, SV., Camidge, DR., Gettinger, SN., et al.[2022]

In a study of 65 patients with extensive-disease small-cell lung cancer, the combination of atezolizumab, carboplatin, and etoposide showed a high response rate of 73.8%, with 80.5% in elderly patients (median age 74 years).

Despite some significant hematological toxicities, such as decreased neutrophil counts in 61.1% of elderly patients, the treatment demonstrated acceptable safety and efficacy, suggesting it could be a preferred standard treatment for elderly patients with this type of cancer.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Real-world data of atezolizumab plus carboplatin and etoposide in elderly patients with extensive-disease small-cell lung cancer. Shiono, A., Imai, H., Wasamoto, S., et al.[2023]

Atezolizumab combined with carboplatin and etoposide was effective in treating a 75-year-old woman with advanced small cell lung cancer and an ECOG Performance Status of 2, leading to complete regression after 4 cycles of treatment.

Despite experiencing some adverse effects like anemia and thrombocytopenia, the patient's therapy was continued due to positive imaging results, highlighting the potential for immunochemotherapy in patients typically excluded from clinical trials.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

A 75-Year-Old Female Smoker with Advanced Small-Cell Lung Cancer and Eastern Cooperative Oncology Group Performance Status 2 who Responded to Combination Immunochemotherapy with Atezolizumab, Etoposide, and Carboplatin. Dębczyński, M., Mojsak, D., Kuklińska, B., et al.[2022]

References

1. New Zealand pubmed.ncbi.nlm.nih.gov

Atezolizumab: A Review in Extensive-Stage SCLC. [2021]

2. United States pubmed.ncbi.nlm.nih.gov

Study: Atezolizumab Improves Survival in SCLC. [2019]

3. Germany pubmed.ncbi.nlm.nih.gov

Atezolizumab addition to platinum doublet: evaluating survival outcomes for patients with extensive disease small cell lung cancer. [2023]

4. United States pubmed.ncbi.nlm.nih.gov

Updated Overall Survival and PD-L1 Subgroup Analysis of Patients With Extensive-Stage Small-Cell Lung Cancer Treated With Atezolizumab, Carboplatin, and Etoposide (IMpower133). [2022]

5. United States pubmed.ncbi.nlm.nih.gov

ADC Shows Effectiveness in SCLC. [2015]

6. England pubmed.ncbi.nlm.nih.gov

Atezolizumab versus docetaxel in patients with previously treated non-small-cell lung cancer (OAK): a phase 3, open-label, multicentre randomised controlled trial. [2022]

7. Germany pubmed.ncbi.nlm.nih.gov

Carboplatin and nab-paclitaxel chemotherapy with or without atezolizumab as front-line management for treatment-naïve metastatic nonsquamous non-small cell lung cancer with PD-L1 staining: a retrospective study. [2023]

8. United States pubmed.ncbi.nlm.nih.gov

First-Line Atezolizumab OK'd for SCLC. [2020]

9. United States pubmed.ncbi.nlm.nih.gov

U.S. Food and Drug Administration Approval Summary: Atezolizumab for Metastatic Non-Small Cell Lung Cancer. [2022]

10. England pubmed.ncbi.nlm.nih.gov

Long-term survival follow-up of atezolizumab in combination with platinum-based doublet chemotherapy in patients with advanced non-small-cell lung cancer. [2022]

11. United States pubmed.ncbi.nlm.nih.gov

Real-world data of atezolizumab plus carboplatin and etoposide in elderly patients with extensive-disease small-cell lung cancer. [2023]

12. United States pubmed.ncbi.nlm.nih.gov

A 75-Year-Old Female Smoker with Advanced Small-Cell Lung Cancer and Eastern Cooperative Oncology Group Performance Status 2 who Responded to Combination Immunochemotherapy with Atezolizumab, Etoposide, and Carboplatin. [2022]