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Potential Vitamin E Signaling Mediators in Skeletal Muscle.

Elisabetta Meacci1,2, Antony Chirco1, Mercedes Garcia-Gil3

  • 1Department of Experimental and clinical Biomedical Sciences "Mario Serio", University of Florence, 50134 Firenze, Italy.

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Vitamin E is crucial for skeletal muscle health. This review explores its forms, effects, and potential benefits for muscle aging and disease.

Keywords:
antioxidant actionmicrogravitymyokinessarcopeniaskeletal musclesphingolipidsvitamin E

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Nutritional Science

Background:

  • Vitamin E (Vit E) is vital for skeletal muscle (SkM) homeostasis, but its specific effectors and modulators in SkM cells, particularly during aging and disease, are not fully understood.
  • Vit E encompasses eight compounds (tocopherols and tocotrienols) with distinct biological activities, exhibiting both antioxidant and non-antioxidant functions.
  • Understanding Vit E's complex roles is crucial for addressing musculoskeletal health decline associated with aging and chronic conditions.

Purpose of the Study:

  • To review current knowledge on Vitamin E's forms and functions within skeletal muscle.
  • To identify potential novel signaling pathways and effectors, such as bioactive sphingolipids and myokines, involved in Vit E's action in SkM.
  • To discuss the potential benefits of Vit E supplementation for counteracting SkM dysfunction in conditions like sarcopenia and microgravity.

Main Methods:

  • Literature review synthesizing existing research on Vitamin E in skeletal muscle.
  • Analysis of biochemical and cellular mechanisms underlying Vit E's antioxidant and non-antioxidant activities.
  • Exploration of emerging research on sphingolipids and myokines as modulators of Vit E action.

Main Results:

  • Vitamin E plays a multifaceted role in SkM, with varying effects depending on the specific compound, tissue, and physiological context.
  • Bioactive sphingolipids and myokines are emerging as key players in modulating Vit E's influence on SkM.
  • Evidence suggests potential therapeutic applications for Vit E in mitigating SkM decline.

Conclusions:

  • Vitamin E's diverse forms and activities significantly impact skeletal muscle health.
  • Further research into novel signaling pathways involving sphingolipids and myokines is warranted to fully elucidate Vit E's mechanisms in SkM.
  • Vitamin E supplementation may offer a promising strategy to combat age-related and disease-induced skeletal muscle dysfunction, including sarcopenia and microgravity-induced atrophy.