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[18F]Fluoro-Peg-Folate

[18F]Fluoro-Peg-Folate is an innovative imaging agent being studied in clinical trials for various inflammatory conditions. This radioactive tracer is designed to target specific cells involved in inflammation, potentially offering a new way to diagnose and monitor diseases such as rheumatoid arthritis and giant cell arteritis. The trials aim to evaluate how well this imaging technique can visualize inflammation, predict disease progression, and assess treatment responses in patients.

Table of Contents

What is [18F]FLUORO-PEG-FOLATE?

[18F]FLUORO-PEG-FOLATE, also known as [18F]Fluor-PEG-Folate, is a novel imaging agent used in positron emission tomography (PET) scans. It is not a medication to treat diseases, but rather a tool to help doctors visualize and measure inflammation in the body[1]. This substance is currently being studied for its potential to improve the diagnosis and monitoring of various inflammatory conditions, particularly rheumatoid arthritis.

How Does [18F]FLUORO-PEG-FOLATE Work?

[18F]FLUORO-PEG-FOLATE works by targeting specific cells in the body called macrophages, which are a type of white blood cell involved in inflammation. When injected into the body, this substance binds to receptors on these macrophages, allowing them to be visible on PET scans[1]. This helps doctors see where inflammation is occurring in the body, even before symptoms may be noticeable.

Medical Conditions Being Studied

Currently, [18F]FLUORO-PEG-FOLATE is being researched for use in several inflammatory conditions:

  • Rheumatoid Arthritis (RA): This is a chronic inflammatory disorder that primarily affects the small joints of the hands and feet[1].
  • ACPA-positive arthralgia: This condition refers to joint pain in individuals who have tested positive for certain antibodies (anti-citrullinated protein antibodies or ACPA) associated with RA, but have not yet developed full-blown arthritis[2].
  • Giant Cell Arteritis (GCA): This is an inflammatory disease of blood vessels, primarily affecting the arteries in the head and neck[3].

Potential Benefits

The use of [18F]FLUORO-PEG-FOLATE in PET scans may offer several potential benefits:

  • Early detection: It may help identify inflammation before symptoms become severe, potentially allowing for earlier treatment[2].
  • Monitoring treatment response: Doctors may use it to see how well treatments are working by comparing scans before and after therapy[1].
  • Predicting disease progression: In conditions like ACPA-positive arthralgia, it might help predict who is likely to develop full RA[2].
  • Guiding treatment decisions: The scans could help doctors decide when to start or change treatments[1][3].

How is [18F]FLUORO-PEG-FOLATE Administered?

[18F]FLUORO-PEG-FOLATE is given as an intravenous injection, meaning it’s delivered directly into a vein. The dose can vary depending on the specific study, but typically ranges from about 200 to 400 MBq (megabecquerels, a unit of radioactivity)[1][3]. After the injection, patients undergo a PET/CT scan, which combines the PET images with CT (computed tomography) images to provide detailed pictures of the body.

Ongoing Research and Clinical Trials

Several clinical trials are currently underway to evaluate the effectiveness of [18F]FLUORO-PEG-FOLATE PET imaging:

  1. Rheumatoid Arthritis Study: This trial is investigating how well [18F]FLUORO-PEG-FOLATE PET/CT can monitor response to anti-TNF therapy in patients with active RA[1].
  2. ACPA-positive Arthralgia Study: This study aims to determine if [18F]FLUORO-PEG-FOLATE PET/CT can predict which patients with ACPA-positive arthralgia will develop clinical arthritis within one year[2].
  3. Giant Cell Arteritis Study: This pilot study is evaluating the use of [18F]FLUORO-PEG-FOLATE PET/CT in patients with active, large vessel GCA, both before and after treatment[3].

These studies will help determine the full potential of [18F]FLUORO-PEG-FOLATE as a diagnostic and monitoring tool for inflammatory conditions. As research progresses, this imaging technique may become an important part of managing these diseases in the future.

Aspect Details
Drug Name [18F]Fluoro-Peg-Folate
Form Solution for injection
Administration Intravenous
Conditions Studied Rheumatoid Arthritis, ACPA positive arthralgia, Giant Cell Arteritis
Imaging Technique PET/CT
Primary Objectives Evaluate effectiveness in visualizing inflammation, monitoring treatment response, predicting disease progression
Key Inclusion Criteria Varies by study; generally includes confirmed diagnosis or high risk of developing the condition being studied
Key Exclusion Criteria Pregnancy, recent changes in treatment, excessive recent radiation exposure
Potential Benefits Earlier diagnosis, better treatment monitoring, improved disease prediction

FAQ

  • What is [18F]Fluoro-Peg-Folate and how does it work? [18F]Fluoro-Peg-Folate is a radioactive tracer used in PET/CT imaging. It targets folate receptors, which are found in high numbers on certain inflammatory cells called macrophages. By binding to these receptors, the tracer allows doctors to see areas of inflammation in the body using special scanning equipment.
  • What conditions are being studied using [18F]Fluoro-Peg-Folate? The clinical trials are focusing on inflammatory conditions such as rheumatoid arthritis, ACPA positive arthralgia (joint pain that may lead to rheumatoid arthritis), and giant cell arteritis (inflammation of blood vessels).
  • How is [18F]Fluoro-Peg-Folate administered to patients? The tracer is given to patients as a solution for injection, typically through intravenous administration. The exact dose varies between trials but is generally in the range of 200-400 MBq (megabecquerels).
  • What are the potential benefits of using this imaging technique? This imaging technique may help doctors better visualize inflammation in the body, potentially leading to earlier diagnosis of conditions like rheumatoid arthritis. It could also help monitor how well treatments are working and predict which patients might develop more severe disease.
  • Are there any risks associated with [18F]Fluoro-Peg-Folate imaging? As with any medical procedure involving radiation, there are some risks. However, the trials carefully control the amount of radiation exposure. Pregnant or breastfeeding women are typically excluded from these studies to avoid any potential risks to the baby.

Ongoing Clinical Trials on [18F]Fluoro-Peg-Folate

  • Study on [18F]Fluoro-PEG-Folate PET-CT Imaging to Monitor Therapy Response in Patients with Rheumatoid Arthritis

    Recruiting

    2 1 1
    Investigated diseases:
    Investigated drugs:
    The Netherlands

  • Study on [18F]Fluoro-PEG-Folate PET Scans for Identifying Rheumatoid Arthritis Risk in Individuals with ACPA Positive Arthralgia

    Recruiting

    2 1 1
    Investigated diseases:
    Investigated drugs:
    The Netherlands

  • Study on [18F]Fluoro-PEG-Folate Imaging for Patients with Giant Cell Arteritis

    Recruiting

    2 1 1
    Investigated diseases:
    Investigated drugs:
    The Netherlands

Glossary

  • PET/CT: Positron Emission Tomography/Computed Tomography, an imaging technique that combines two types of scans to create detailed, 3D pictures of the inside of the body.
  • Rheumatoid Arthritis (RA): A chronic inflammatory disorder that typically affects the small joints in your hands and feet, causing painful swelling that can eventually result in bone erosion and joint deformity.
  • ACPA: Anti-Citrullinated Protein Antibodies, specific antibodies found in the blood of many people with rheumatoid arthritis. A positive ACPA test can help diagnose RA or indicate a higher risk of developing it.
  • Arthralgia: Joint pain without swelling or inflammation. In the context of these studies, it refers to joint pain that might be an early sign of developing rheumatoid arthritis.
  • Giant Cell Arteritis (GCA): An inflammatory disease affecting the large blood vessels of the scalp, neck and arms. It can cause headaches, jaw pain, and vision problems.
  • Macrophages: A type of white blood cell that engulfs and digests cellular debris, foreign substances, microbes, and cancer cells in a process called phagocytosis. They play a significant role in inflammation.
  • Folate Receptor: A protein on the surface of some cells that binds to folate (vitamin B9). These receptors are often present in high numbers on certain cancer cells and inflammatory cells.
  • MBq (Megabecquerel): A unit of measurement for radioactivity. One megabecquerel is equal to one million decays per second.
  • TNF: Tumor Necrosis Factor, a cell signaling protein involved in systemic inflammation. Anti-TNF therapy is a common treatment for rheumatoid arthritis.
  • Synovial Tissue: The soft tissue that lines the spaces of diarthrodial joints, tendon sheaths, and bursae. In rheumatoid arthritis, this tissue becomes inflamed.

References

  1. http://clinicaltrials.eu/trial/study-on-18ffluoro-peg-folate-pet-ct-imaging-to-monitor-therapy-response-in-patients-with-rheumatoid-arthritis/
  2. http://clinicaltrials.eu/trial/study-on-18ffluoro-peg-folate-pet-scans-for-identifying-rheumatoid-arthritis-risk-in-individuals-with-acpa-positive-arthralgia/
  3. http://clinicaltrials.eu/trial/study-on-18ffluoro-peg-folate-imaging-for-patients-with-giant-cell-arteritis/