#1 Clinical Trials Search in Europe

Testosterone

Clinical trials involving testosterone therapy are shedding light on new treatment options for various conditions. These studies are investigating different formulations and dosages of testosterone to address issues such as hypogonadism, prostate cancer, and hormone replacement. By examining the safety, efficacy, and effects of testosterone therapy, researchers aim to improve patient outcomes and quality of life.

Table of Contents

What is Testosterone?

Testosterone is a hormone that plays a crucial role in male health. It is primarily produced by the testes in men and is responsible for many masculine characteristics, such as muscle mass, body hair, and deep voice. In medical terms, testosterone is often referred to as an androgen, which means a male hormone[1].

Medical Uses of Testosterone

Testosterone is primarily used to treat a condition called hypogonadism, which is when the body doesn’t produce enough testosterone on its own. This condition can cause various symptoms, including[2][3]:

  • Low energy levels
  • Reduced muscle mass
  • Decreased sexual function
  • Changes in mood or cognitive function

In addition to hypogonadism, testosterone therapy is also being studied for its potential benefits in certain cases of prostate cancer. While this might seem counterintuitive, some research suggests that in specific situations, testosterone might help manage hormone-refractory prostate cancer, which is a type of prostate cancer that no longer responds to standard hormone therapy[1].

Forms and Administration of Testosterone

Testosterone replacement therapy comes in several forms, each with its own advantages. Some of the common forms include[4][1][5]:

  • Testosterone pellets (Testopel®): These are small pellets implanted under the skin, usually in the hip area. They slowly release testosterone over several months.
  • Transdermal patches (Androderm®): These are patches applied to the skin daily, delivering a steady dose of testosterone.
  • Oral capsules: Some forms of testosterone can be taken by mouth, such as testosterone undecanoate (LPCN 1021).

The choice of form depends on various factors, including patient preference, lifestyle, and specific medical needs.

Effectiveness of Testosterone Therapy

The effectiveness of testosterone therapy is typically measured by monitoring testosterone levels in the blood and assessing symptom improvement. Studies have shown that testosterone replacement can effectively raise testosterone levels to the normal range in most patients with hypogonadism[2][3].

For example, one study found that after 24 days of treatment with oral testosterone undecanoate, a significant proportion of patients achieved normal testosterone levels[2]. Another study using testosterone pellets showed that testosterone levels could be maintained in the therapeutic range for 4-6 months after a single implantation[4].

Potential Side Effects and Monitoring

While testosterone therapy can be beneficial, it’s important to be aware of potential side effects. Regular monitoring is crucial to ensure safe and effective treatment. Some key aspects that are typically monitored include[4][5]:

  • Testosterone levels: To ensure they remain within the normal range.
  • Hematocrit levels: Testosterone can increase red blood cell production, which might lead to blood thickening in some cases.
  • PSA (Prostate Specific Antigen) levels: To monitor prostate health, as testosterone might affect the prostate gland.
  • Estradiol levels: Some testosterone can be converted to estrogen in the body, so estradiol (a form of estrogen) is also monitored.
  • Blood pressure: Some studies are investigating the effects of testosterone on blood pressure.

Ongoing Research and Future Directions

Research on testosterone therapy is ongoing, with scientists exploring its potential benefits and risks in various conditions. Some areas of current research include[6][5]:

  • The use of new imaging techniques, such as PET scans with special tracers, to better understand how testosterone interacts with prostate cancer cells.
  • The effects of testosterone therapy on cardiovascular health, including blood pressure.
  • The potential benefits of testosterone on quality of life, sexual function, and muscle strength in men with low testosterone levels.

These ongoing studies aim to provide a more comprehensive understanding of testosterone’s role in health and disease, potentially leading to improved treatments in the future.

Study Focus Testosterone Formulations Key Outcomes Measured Patient Populations
Oral testosterone undecanoate LPCN 1021 (150mg TID, 225mg BID) Total testosterone levels, safety Hypogonadal men
Blood pressure effects LPCN 1021 (225mg BID) 24-hour blood pressure, quality of life Hypogonadal men
Testosterone replacement in prostate cancer Androderm patches (2.5mg, 5.0mg, 7.5mg) Safety, testosterone levels, PSA, quality of life Men with low-risk hormone-refractory prostate cancer
Long-acting subcutaneous pellets Testopel (75mg) vs. generic (100mg, 200mg) Testosterone levels, hematocrit, PSA, estradiol Men with hypogonadism

FAQ

  • What conditions are being studied in these testosterone clinical trials? The clinical trials are studying testosterone therapy for conditions such as male hypogonadism, hormone-refractory prostate cancer, and testosterone replacement in men with low testosterone levels.
  • What forms of testosterone are being tested? Various forms of testosterone are being tested, including oral testosterone undecanoate (LPCN 1021), testosterone patches (Androderm), and subcutaneous testosterone pellets (Testopel and generic versions).
  • What are the main goals of these clinical trials? The main goals include assessing the safety and efficacy of different testosterone formulations, evaluating their effects on testosterone levels, and measuring impacts on quality of life, sexual functioning, and muscle strength.
  • How long do these clinical trials typically last? The duration varies, but many of the trials last several months. For example, some studies measure outcomes at 2, 4, and 6 months after treatment initiation.
  • What are some of the outcomes being measured in these trials? Outcomes being measured include changes in testosterone levels, hematocrit levels, PSA levels, estradiol levels, blood pressure, quality of life metrics, sexual functioning, and muscle strength.

Ongoing Clinical Trials on Testosterone

  • Study of Darolutamide and Testosterone for Patients with Advanced Prostate Cancer Resistant to Standard Hormone Therapy

    Recruiting

    1 1 1
    Investigated diseases:
    Investigated drugs:
    Germany

  • Study on Testosterone and Isopropyl Myristate for Women with Turner Syndrome

    Recruiting

    1 1
    Investigated diseases:
    Investigated drugs:
    Denmark

  • Study on the Effects of Testosterone Gel on Physical Performance in Critically Ill Patients Requiring Long-Term Mechanical Ventilation

    Recruiting

    1 1
    Investigated diseases:
    Investigated drugs:
    France

  • Study on the Effectiveness of Hormonal Treatment with Estradiol Hemihydrate and Testosterone in Adolescents with Gender Dysphoria

    Recruiting

    1 1 1 1
    Investigated drugs:
    France

  • Testosterone Treatment for Boys with Klinefelter Syndrome: A Study on Body Composition Changes During Puberty

    Recruiting

    1 1
    Investigated diseases:
    Investigated drugs:
    Denmark

  • Study of transdermal testosterone gel to improve ovarian response in women with low ovarian reserve and androgen receptor polymorphism undergoing fertility treatment

    Not yet recruiting

    1 1 1
    Investigated diseases:
    Investigated drugs:
    Spain

  • Study of testosterone gel treatment for women with low ovarian reserve and androgen receptor polymorphism undergoing fertility treatment

    Not yet recruiting

    1 1 1 1
    Investigated diseases:
    Investigated drugs:
    Spain

  • A study to compare the absorption of testosterone transdermal gel in healthy female subjects

    Not recruiting

    1 1 1
    Investigated diseases:
    Investigated drugs:
    Portugal

  • Study on Testosterone Therapy for Men with Low Testosterone and Prostate Cancer Undergoing Surgery

    Not recruiting

    1 1 1
    Investigated diseases:
    Investigated drugs:
    The Netherlands

Glossary

  • Hypogonadism: A condition in which the body doesn't produce enough testosterone, the primary male sex hormone. This can affect physical and sexual development in males.
  • Testosterone Replacement Therapy (TRT): Treatment used to boost testosterone levels in men with low testosterone, often to alleviate symptoms of hypogonadism.
  • Androderm: A brand name for a testosterone patch that delivers testosterone through the skin.
  • Testopel: A brand name for testosterone pellets that are surgically implanted under the skin to provide long-acting testosterone replacement.
  • PSA (Prostate Specific Antigen): A protein produced by the prostate gland. High levels may indicate prostate cancer or other prostate conditions.
  • Hematocrit: The percentage of red blood cells in the blood. Testosterone therapy can sometimes increase hematocrit levels.
  • Estradiol: A form of estrogen that can increase in men undergoing testosterone therapy due to the conversion of testosterone to estrogen.
  • Subcutaneous: Beneath the skin. Some testosterone treatments are administered subcutaneously.
  • Hormone-refractory prostate cancer: Prostate cancer that continues to grow despite hormone therapy to lower testosterone levels.
  • Ambulatory Blood Pressure Monitoring (ABPM): A method of measuring blood pressure at regular intervals over 24 hours while patients go about their normal daily activities.

References

  1. https://clinicaltrials.gov/study/NCT01187485
  2. https://clinicaltrials.gov/study/NCT03242408
  3. https://clinicaltrials.gov/study/NCT03242590
  4. https://clinicaltrials.gov/study/NCT04523480
  5. https://clinicaltrials.gov/study/NCT03868059
  6. https://clinicaltrials.gov/study/NCT02297386