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Igg4 Tetravalent Bispecific Antibody-Like Protein Against Pd-1 And Ctla4

This article explores the ongoing clinical trials investigating the use of Lorigerlimab, an IgG4 tetravalent bispecific antibody-like protein targeting PD-1 and CTLA4, in combination with docetaxel for treating metastatic castration-resistant prostate cancer (mCRPC). The study aims to assess the efficacy and safety of this novel treatment approach compared to standard docetaxel therapy alone, offering potential new hope for patients with advanced prostate cancer.

Table of Contents

What is Lorigerlimab?

Lorigerlimab, also known as MGD019, is an innovative medication being studied for the treatment of metastatic castration-resistant prostate cancer (mCRPC)[1]. It is classified as an IgG4 tetravalent bispecific antibody-like protein that targets two important proteins in the immune system: PD-1 and CTLA4[1].

This medication is also referred to as a Bispecific DART® molecule, which stands for Dual-Affinity Re-Targeting. This advanced technology allows the drug to interact with two different targets simultaneously, potentially enhancing its effectiveness in fighting cancer[1].

Target Condition: Metastatic Castration-Resistant Prostate Cancer

Metastatic castration-resistant prostate cancer is an advanced form of prostate cancer that has spread to other parts of the body and no longer responds to hormone therapy (also known as androgen deprivation therapy)[1]. This condition is challenging to treat and requires innovative approaches, which is why new medications like Lorigerlimab are being studied.

How Lorigerlimab Works

Lorigerlimab works by targeting two key proteins involved in regulating the immune system’s response to cancer:

  • PD-1 (Programmed Cell Death Protein 1): This protein acts as a “brake” on the immune system. Cancer cells can sometimes exploit PD-1 to evade detection by immune cells.
  • CTLA4 (Cytotoxic T-Lymphocyte-Associated Protein 4): Similar to PD-1, CTLA4 also helps regulate the immune system’s activity.

By targeting both PD-1 and CTLA4, Lorigerlimab aims to “release the brakes” on the immune system, allowing it to recognize and attack cancer cells more effectively[1].

Clinical Trial Details

Lorigerlimab is currently being studied in a Phase 2 clinical trial for patients with metastatic castration-resistant prostate cancer[1]. Here are some key details about the trial:

  • Trial Design: This is a randomized, open-label study comparing Lorigerlimab plus docetaxel to docetaxel alone[1].
  • Main Objective: To evaluate the efficacy of Lorigerlimab combined with docetaxel compared to docetaxel alone, as measured by radiographic progression-free survival (rPFS)[1].
  • Treatment Duration: Treatment with Lorigerlimab may continue for up to 35 cycles, with each cycle lasting 3 weeks[1].
  • Dosage: The maximum daily dose of Lorigerlimab is 6 mg/kg, with a maximum total dose of 210 mg/kg over a 24-month period[1].

Eligibility Criteria

To participate in this clinical trial, patients must meet certain criteria. Some key inclusion criteria are:

  • Diagnosed with metastatic castration-resistant adenocarcinoma of the prostate[1].
  • Have at least one metastatic lesion[1].
  • Show evidence of disease progression after receiving at least one prior androgen receptor axis-targeted therapy (ARAT)[1].
  • Have adequate performance status, life expectancy, and laboratory values[1].

Some exclusion criteria include:

  • Prior chemotherapy for mCRPC or prior treatment with checkpoint inhibitors for prostate cancer[1].
  • Current active or chronic infections[1].
  • Any clinically significant heart, lung, or gastrointestinal disorders[1].

Potential Benefits

The clinical trial aims to assess several potential benefits of Lorigerlimab, including:

  • Improved survival without cancer progression (radiographic progression-free survival)[1].
  • Better response rates to treatment[1].
  • Longer overall survival[1].
  • Improved quality of life and reduced cancer-related symptoms[1].

Side Effects and Safety

As with any new medication, monitoring for potential side effects is a crucial part of the clinical trial. The study will carefully evaluate the safety and tolerability of Lorigerlimab when combined with docetaxel[1]. Patients will be closely monitored for any adverse events throughout the trial.

Conclusion

Lorigerlimab represents a promising new approach in the treatment of metastatic castration-resistant prostate cancer. By targeting both PD-1 and CTLA4, it aims to enhance the body’s immune response against cancer cells. The ongoing clinical trial will provide valuable information about its effectiveness and safety, potentially offering new hope for patients with this challenging form of prostate cancer.

Aspect Details
Study Type Phase 2, Randomized, Open-Label
Main Objective Evaluate efficacy of Lorigerlimab+docetaxel vs. docetaxel alone
Primary Endpoint Median radiographic progression-free survival (rPFS)
Key Secondary Endpoints Objective response rate, PSA response, Overall survival, Safety/tolerability
Treatment Arms 1. Lorigerlimab + docetaxel + prednisone
2. Docetaxel + prednisone
Treatment Duration Up to 35 cycles for Lorigerlimab, up to 10 cycles for docetaxel
Follow-up Period Up to 2 years after last dose of study treatment
Key Inclusion Criteria mCRPC, ≥1 metastatic lesion, disease progression, prior ARAT therapy
Key Exclusion Criteria Prior chemotherapy for mCRPC, prior checkpoint inhibitors, active infections

FAQ

  • What is Lorigerlimab and how does it work? Lorigerlimab is an IgG4 tetravalent bispecific antibody-like protein that targets two important immune checkpoints: PD-1 and CTLA4. It works by enhancing the body's immune response against cancer cells, potentially improving the effectiveness of cancer treatment.
  • What is the main goal of this clinical trial? The main goal of this trial is to evaluate the efficacy of Lorigerlimab combined with docetaxel compared to docetaxel alone in patients with metastatic castration-resistant prostate cancer. This is measured primarily by radiographic progression-free survival (rPFS).
  • Who is eligible to participate in this clinical trial? Eligible participants include those with metastatic castration-resistant prostate cancer who have progressed after receiving at least one prior androgen receptor axis-targeted therapy. Patients must have at least one metastatic lesion and adequate performance status, life expectancy, and laboratory values.
  • What are some of the key exclusion criteria for this trial? Key exclusion criteria include prior chemotherapy for mCRPC, previous treatment with checkpoint inhibitors for prostate cancer, current active or chronic infections, and significant heart, lung, or gastrointestinal disorders.
  • How long does the treatment phase of the trial last? The treatment phase of the trial can last up to 35 cycles for Lorigerlimab and up to 10 cycles for docetaxel. Each cycle is 3 weeks long, potentially lasting up to 105 weeks (about 2 years) for Lorigerlimab treatment.

Ongoing Clinical Trials on Igg4 Tetravalent Bispecific Antibody-Like Protein Against Pd-1 And Ctla4

  • Study of Lorigerlimab and Docetaxel for Patients with Metastatic Castration-Resistant Prostate Cancer

    Not recruiting

    2 1 1 1
    Investigated drugs:
    Belgium Bulgaria France Poland Spain

Glossary

  • Metastatic Castration-Resistant Prostate Cancer (mCRPC): A type of advanced prostate cancer that has spread to other parts of the body and continues to grow despite treatments that lower testosterone levels.
  • IgG4 Tetravalent Bispecific Antibody-Like Protein: A specially designed protein that can bind to two different targets (in this case, PD-1 and CTLA4) to enhance the immune system's ability to fight cancer cells.
  • Docetaxel: A chemotherapy drug commonly used to treat various types of cancer, including prostate cancer.
  • Radiographic Progression-Free Survival (rPFS): The length of time during and after treatment that a patient lives without their cancer growing or spreading, as determined by imaging scans.
  • Androgen Receptor Axis-Targeted Therapy (ARAT): A type of treatment that targets the androgen receptor or the production of androgens (male hormones) to slow down prostate cancer growth.
  • PCWG3 Criteria: Prostate Cancer Working Group 3 criteria, a set of guidelines used to assess disease progression and treatment response in prostate cancer clinical trials.
  • Objective Response Rate (ORR): The proportion of patients whose cancer shrinks or disappears after treatment.
  • PSA (Prostate-Specific Antigen): A protein produced by the prostate gland; elevated levels may indicate prostate cancer or other prostate conditions.
  • Overall Survival (OS): The length of time from the start of treatment until death from any cause.
  • Quality of Life (QOL): A measure of a patient's overall well-being and ability to function in daily life during and after treatment.

References

  1. http://clinicaltrials.eu/trial/study-of-lorigerlimab-and-docetaxel-for-patients-with-metastatic-castration-resistant-prostate-cancer/