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Female Breast CancerMEXBSONCT06696378

Melatonin Supplementation and Exercise Program in Breast Cancer Women

A study testing Melatonin 6 mg in people with Female Breast Cancer and Older Adults, run by University of Valladolid at 1 site in Spain.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

Introduction: Breast cancer (BC) remains the leading cause of cancer in women with nearly 1.4 million new cases worldwide annually and 27.000 in Spain. Increasingly effective oncology therapies, however, have numerous adverse effects such as muscle degeneration, fatigue, decreased physical function and aerobic… Read more about this study

Who is it for?
Ages 60 to 75 years, women only
What is being tested?
Melatonin 6 mg
Type of treatment
Pill or oral medicine
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
42 participants
Where
1 siteSpain
Study dates
11 Nov 2024to 5 May 2025
Phase
Interventional
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 60 to 75 years
  • Women only
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Postmenopausal women aged 60-75 years with a history of ductal carcinoma in situ, lobular carcinoma in situ, or stage I-III breast cancer diagnosed 5 years or more previously; not currently receiving chemotherapy, radiotherapy, or endocrine therapy; and with an Eastern Cooperative Oncology Group (ECOG) performance status ≤1.

Who cannot join

  • Women who had exercised regularly for at least 20 minutes per session and at least twice per week during the 3 months before the study; stage IV breast cancer or systemic recurrence; previous malignancies of any type other than breast cancer, basal or squamous cell carcinoma of the skin, or carcinoma in situ of the cervix; known autoimmune diseases, including systemic lupus erythematosus (SLE), rheumatoid arthritis (RA), and multiple sclerosis; decompensated liver cirrhosis; severe kidney disease; use of adjuvant hormonal therapy, oral estrogen or progesterone replacement therapy, or luteinizing hormone-releasing hormone agonists currently or within the previous 60 days; less than 6 months since completion of chemotherapy; concomitant use of sleeping pills every night at bedtime; concomitant use of black cohosh, flaxseed, or soy in pill or supplement form; functional limitation defined as a Barthel Index <100 or Lawton-Brody score <8; uncontrolled hypertension (>180/100 mmHg); uncontrolled atrial or ventricular arrhythmias, dissecting aortic aneurysm, severe aortic stenosis, or acute endocarditis/pericarditis; acute thromboembolic disease; moderate or severe chronic obstructive pulmonary disease (COPD) with BODE index C or D; recent bone fracture within the previous month; any other medical condition considered by the treating physician to preclude participation in physical activity; neoadjuvant chemotherapy or radiotherapy; concomitant use of beta-blockers; less than 6 months since completion of radiotherapy; concomitant use of postmenopausal hormone replacement therapy; use of any type of oral melatonin supplement within the previous 30 days; acute or chronic heart failure with New York Heart Association (NYHA) class >II; uncontrolled orthostatic hypotension; recent acute myocardial infarction (3-6 months) or unstable angina; acute or chronic respiratory failure; diabetes mellitus with acute decompensation or uncontrolled hypoglycemia; history of diagnosed dementia; and shift work or night work.

Trial locations and contacts

1 site in 1 country.

Spain1 site
  • Faculty of Health Sciences, University of Valladolid Soria Campus

    Soria, 42004

Other trials in Spain

About this study

Official title: Impact of Melatonin Supplementation Plus Exercise Program in Women Who Have Suffered From Breast Cancer in the Province of Soria, Spain

Introduction: Breast cancer (BC) remains the leading cause of cancer in women with nearly 1.4 million new cases worldwide annually and 27.000 in Spain. Increasingly effective oncology therapies, however, have numerous adverse effects such as muscle degeneration, fatigue, decreased physical function and aerobic capacity, and deteriorating quality of life. In this sense, physical activity (PA) seems to be an interesting non-pharmacological strategy to alleviate these serious complications and with potential benefits for women with BC. Melatonin (N-acetyl-5 methoxytryptamine) is an indolic compound present with pleiotropic bioactions that regulates the circadian rhythm, antioxidant, anti-inflammatory, immunostimulant, cardioprotective, antidiabetic, antiobesity, neuroprotective, and antiaging actions. Furthermore, in recent years, many studies have described the key role of melatonin in preventing and developing cancer. The general anticarcinogenic mechanisms include epigenetic control, cell proliferation modulation, cell cycle regulation, apoptosis induction, and telomerase inhibition. Melatonin also exerts antiestrogenic activity, which is particularly significant in hormone-dependent tumors, regulating the expression and transactivation of the estrogen receptor, and modulating the enzymes involved in the local synthesis of estrogens. Despite all the mentioned properties, the use of melatonin in daily clinical practice is very limited, and additional studies are needed to better establish the role of this hormone in oncological clinical applications against different types of cancer.

Objective: To analyze the effect of supplementation with 4 g/day of melatonin for 10 weeks on muscle damage (CK and LDH), hormonal responses (estradiol, testosterone, cortisol and testosterone/cortisol ratio), antioxidant capacity (BAP and d-ROMs), Exerkins (Irisin and Sestrin 2), physical performance (handgrip strength, RPE and SPPB), anthropometry (body mass, BMI and fat mass) and WHOQOL-BREF (physical and psychological health, social relationships and environment) in women over 60 years of age who have suffered breast cancer and who follow a physical training program.

Methods: A total of 20 female volunteers between 60 and 73 years old (age: 65.5±4.52 years, BMI: 25.83±2.67 and body fat percentage: 33.73±5.54) who followed a physical activity adapted to their age and abilities are the members. of this study. The volunteers were divided into two groups: placebo (CG; n = 10) and supplemented with 5 g/day of melatonin (GI; n = 10). Differtent test were performed muscle damage (CK, and LDH), hormonal responses (estradiol, testosterone, cortisol, and testosterone/cortisol ratio), antioxidant capacity (BAP and d-ROMs), Exerkins (Irisin and Sestrin 2), physical performance (Hand-grip strength, RPE and SPPB), anthropometrics (Body mass, BMI and fat mass), and WHOQOL-BREF (physical and psychological health, social relationships and environment) were analyzed at the beginning (T1) and at the end of the 10 weeks of intervention (T2).

Being tested
Melatonin 6 mg, Placebo
Keywords
Brear Cancer, Melatonin, quality of life, physical performance, health biomarkers, antioxidant capacity, anthropometrics parameters, Exerkins

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Melatonin 6 mgDietary supplement

    One capsule containing 6 mg of melatonin was administered once daily for 10 weeks. Melatonin (Nutrifoods® Laboratories, Barcelona, Spain) was prepared by the Magistral Formulation Laboratory of a pharmacy (Soria, Spain), in accordance with the requirements of the Royal Spanish Pharmacopoeia (Ministry of Health, Government of Spain). Melatonin had a technical data sheet certifying its composition and purity (Reference No. DIE-134).

  • PlaceboOther

    One matched placebo capsule containing 100 mg of maltodextrin was administered once daily for 10 weeks. The placebo capsule was identical in appearance to the melatonin capsule to maintain participant blinding.

Study groups in NCT06696378
Study groupRoleWhat they receive
Melatonin supplementation groupExperimentalParticipants received one capsule containing 6 mg of melatonin once daily for 10 weeks, in addition to the concurrent exercise-training program.
Receives: Dietary Supplement: Melatonin 6 mg
Placebo supplementation groupPlacebo comparatorParticipants received one matched placebo capsule once daily for 10 weeks, in addition to the same concurrent exercise-training program.
Receives: Other: Placebo

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Plasma irisin concentration

    Plasma irisin concentration was measured using an enzyme-linked immunosorbent assay (ELISA).

    Measured: Baseline and after 10 weeks (Day 70)

  2. Plasma sestrin-2 concentration

    Plasma sestrin-2 concentration was measured using an enzyme-linked immunosorbent assay (ELISA).

    Measured: Baseline and after 10 weeks (Day 70)

Secondary outcomes (13)
  1. Biological antioxidant potential (BAP)

    Biological antioxidant potential (BAP) was measured to assess plasma antioxidant capacity.

    Measured: Baseline and after 10 weeks (Day 70)

  2. Plasma reactive oxygen metabolite concentration (d-ROMs)

    Plasma reactive oxygen metabolites (d-ROMs), reflecting circulating hydroperoxide levels and oxidant status, were measured using the FREE Carpe Diem analytical system.

    Measured: Baseline and after 10 weeks (Day 70)

  3. World Health Organization Quality of Life-BREF (WHOQOL-BREF) domain scores

    Quality of life was assessed using the World Health Organization Quality of Life-BREF (WHOQOL-BREF), covering four domains: physical health, psychological health, social relationships, and environment. Domain scores range from 4 to 20, with higher scores indicating better quality of life.

    Measured: Baseline and after 10 weeks (Day 70)

  4. Plasma creatine kinase (CK) activity

    Plasma creatine kinase (CK) activity was measured as a biomarker of muscle damage using an automated clinical chemistry analyzer (Hitachi 917).

    Measured: Baseline and after 10 weeks (Day 70)

  5. Plasma lactate dehydrogenase (LDH) activity

    Plasma lactate dehydrogenase (LDH) activity was measured as a biomarker of muscle damage using an automated clinical chemistry analyzer (Hitachi 917).

    Measured: Baseline and after 10 weeks (Day 70)

  6. Blood cortisol concentration

    Blood cortisol concentration was measured using an enzyme-linked fluorescence assay (ELFA) on a MiniVIDAS® multiparametric immunoanalyzer. Results were expressed in µg/dL.

    Measured: Baseline and after 10 weeks (Day 70)

  7. Blood total testosterone concentration

    Blood total testosterone concentration was measured using an enzyme-linked immunosorbent assay (ELISA). Results were expressed in ng/mL.

    Measured: Baseline and after 10 weeks (Day 70)

  8. Plasma estradiol concentration

    Plasma estradiol concentration was measured using an enzyme-linked immunosorbent assay (ELISA).

    Measured: Baseline and after 10 weeks (Day 70)

  9. Body mass index (BMI)

    Body mass index (BMI) was calculated from body mass and height and expressed in kg/m².

    Measured: Baseline and after 10 weeks (Day 70)

  10. Fat mass percentage

    Fat mass was assessed by bioelectrical impedance analysis using a Tanita BC-730 analyzer and expressed as a percentage of body mass (%)

    Measured: Baseline and after 10 weeks (Day 70)

  11. Short Physical Performance Battery (SPPB) total score

    Physical performance was assessed using the Short Physical Performance Battery (SPPB), comprising balance, 4-meter gait speed, and five-repetition chair-stand tests. The total score ranges from 0 to 12 points, with higher scores indicating better physical performance.

    Measured: Baseline and after 10 weeks (Day 70)

  12. Hand-grip strength

    Handgrip strength was measured as an indicator of upper-limb muscular strength and expressed in kilograms (kg).

    Measured: Baseline and after 10 weeks (Day 70)

  13. Rating of Perceived Exertion using the Borg Category Ratio-10 (CR-10) scale

    Perceived exertion was assessed using the Borg Category Ratio-10 (CR-10) scale, ranging from 0 (no exertion) to 10 (maximal exertion). Higher scores indicate greater perceived exertion.

    Measured: Baseline and after 10 weeks (Day 70)

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted20 Nov 2024
  2. Study start11 Nov 2024
  3. Primary completion5 May 2025
  4. Study completion5 May 2025

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Model description
Parallel group placebo-controlled randomized clinical trial
Masking
Double blind
Who is masked
Participant, Care provider
Enrolment
42 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT06696378
Sponsor's protocol ID
2024.08.12
Acronym
MEXBSO
Status last verified
Sep 2026
First submitted
22 Aug 2024
Last updated
30 Sep 2026
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No

Publications

  • Celorrio San Miguel AM, Cacharro LM, Santamaria G, Garrosa M, Celorrio San Miguel M, Roche E, Garrosa E, Fernandez-Lazaro D. Adjuvant melatonin therapy during exercise prescription in breast cancer survivors on physical and anthropometric parameters, quality of life, and hormonal response. A randomized controlled trial. Front Sports Act Living. 2025 Jun 23;7:1594733. doi: 10.3389/fspor.2025.1594733. eCollection 2025.

    PubMed 40625889

Questions about this trial

What is this clinical trial studying?

A study testing Melatonin 6 mg in people with Female Breast Cancer and Older Adults, run by University of Valladolid at 1 site in Spain.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 1 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 30 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Spain. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Plasma irisin concentration (time frame: Baseline and after 10 weeks (Day 70)). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT06696378, which also lists 1 linked publication.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 30 Sep 2026.

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