Melatonin Supplementation and Exercise Program in Breast Cancer Women

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 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).

Conditions

• Female Breast Cancer
• Older Adults
• Exercise Trainning Progrmam

Interventions

DIETARY_SUPPLEMENT

Melatonin 6 mg

wo capsules per day; Each capsule includes 3mg Melatonin Nutrifoods® Laboratories, Barcelona, Spain) by the Magistral Formulation Laboratory of a Pharmacy (Soria, Spain), following the rules of the Royal Spanish Pharmacopoeia (Ministry of Health, Government of Spain). Melatonin has a technical data sheet that guarantees its composition and purity (Reference No.: DIE-134).

OTHER

Placebo

Two capsules per day; Each capsule includes 100-mg maltodextrin capsules were used as a placebo to match the color and texture of the Melatonin tablets to ensure blinding.

Sponsors & Collaborators

• Sanidad de Castilla y León

  collaborator OTHER

• Ministerio de Ciencia e Innovación, Spain

  collaborator OTHER_GOV

• Fundación General Universidad de Valladolid

  collaborator OTHER

• University of Valladolid

  lead OTHER

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

DOUBLE

Model

PARALLEL

Eligibility

Min Age

60 Years

Max Age

80 Years

Sex

FEMALE

Healthy Volunteers

No

Timeline & Regulatory

Start

2025-01-15

Primary Completion

2025-12-20

Completion

2026-05-01

Countries

• Spain

Study Locations