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NCT Number: NCT06437574

Intensive Cholesterol-Lowering and CD8+ T Cells in Prostate Cancer

To test the hypothesis that intensive cholesterol lowering (iCL) therapy has anti-tumor immune modulating activity, the investigators will conduct an open-label, single-arm phase II trial in prostate cancer patients who are in active surveillance and undergoing a planned surveillance biopsy in 3-6 months. Eligible patients will initiate iCL with Vytorin®(group 1, 2, and 3), an FDA-approved combination of ezetimibe and simvastatin used to lower atherogenic low density lipoprotein cholesterol (LDL-C) or Ezetimibe (group 4). Starting dose will be determined by current statin use and LDL-C levels. Dose modifications of VYTORIN will be employed with the goal of achieving LDL-C <70 mg/dl. Dose adjustment is not allowed for ezetimibe.

Recruiting

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Key information

Age range

18 year and older

Sex eligibility

Male

Study type

Interventional

Phase

Phase 2

Primary location

Cedars-Sinai Medical Center

Los Angeles, California, 90048, United States

Location status: Recruiting

Location contact

Amy Hoang

CONTACT

[email protected]

310-423-1542

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Provision of signed and dated informed consent form.
  • Stated willingness to comply with all study procedures and availability for the duration of the study.
  • At least one Atherosclerotic Cardiovascular Disease (ASCVD) risk factor, such as:
  • ≥ 50 years of age
  • Hypertension
  • Hypercholesterolemia
  • Diabetes
  • Current or former smoker
  • First-degree family history of any cardiovascular heart disease
  • BMI > 25
  • On hypertension treatment, statin, and/or aspirin therapy
  • Patients with clinically localized prostate cancer. That is Low or intermediate risk prostate cancer defined as:
  • Pre-operative PSA (Prostate Specific Antigen) ≤ 20.0 ng/ml
  • Clinical stage T1c or cT2
  • Gleason score 3+3 or 3+4 or 4+3
  • Patients on AS with plans for surveillance biopsy
  • No previous treatment for prostate cancer with radiotherapy, chemotherapy, or hormonal therapy
  • Ability to take oral medication and be willing to adhere to once daily, oral Vytorin or ezetimibe.
  • Agree to avoid consumption of grapefruit and grapefruit juice ≥ one quart per day throughout study duration.

Exclusion criteria

  • Current use of medications contraindicated for use with a statin such as strong CYP3A4 inhibitors (e.g., itraconazole, ketoconazole, posaconazole, erythromycin, clarithromycin, telithromycin, HIV protease inhibitors, and nefazodone).
  • Current use of medications contraindicated for use with ezetimibe (i.e., gemfibrozil, cyclosporine, or danazol).
  • History of allergic or severe reaction to a either study agent.
  • History of moderate or severe myalgia with statin use.
  • Acute liver failure or decompensated cirrhosis
  • Already on maximum VYTORIN dose (10/80)
  • Already on medication(s) known to interact with Vytorin or Ezetimibe that may prevent protocol-based escalation of cholesterol-lowering therapy from pre-enrollment baseline.
  • Already on a PCSK9 inhibitor

Treatment and study plan

vytorin

Drug

Vytorin is a drug combination (Ezetimibe and Simvastatin) that targets the two primary sources of cholesterol, absorption in the gut and synthesis in the liver.

ezetimibe

Drug

Ezetimibe is a drug that targets one of the primary sources of cholesterol, absorption in the gut.

Primary outcomes

  1. Pre/Post-change in percent prostate infiltrating CD8+ T lymphocytes.

    Time frame: 3 to 6 months of cholesterol-lowering intervention

    Our primary hypothesis is that maximum cholesterol lowering will increase CD8+ memory T cells and increase CD8+ T cell infiltration into prostate tissue. Change in CD8+ T cells in the prostate from baseline to 3 to 6 months is the primary endpoint.

Study contacts

Contact information is provided by the study sponsor or research team.

Amy Hoang

CONTACT

[email protected]

310-423-1542

Laura Sarmiento

CONTACT

[email protected]

310-423-4295

Sponsors and collaborators

Lead sponsor

Cedars-Sinai Medical Center

Other

Registry information

Official study title

Lowering Cholesterol in Prostate Cancer to Target Rapamycin-Insensitive Companion Of MTOR (TORC2) in T-Cell Surface Glycoprotein CD8 Alpha Chain (CD8+) Lymphocytes

Important dates

Study start
2024
Primary completion
2028
Study completion
2028
First posted
May 31, 2024
Registry last updated
Mar 11, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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