{"id":28456,"date":"2025-09-13T06:00:15","date_gmt":"2025-09-13T04:00:15","guid":{"rendered":"https:\/\/cristinatomasi.com\/?p=28456"},"modified":"2026-01-07T10:51:52","modified_gmt":"2026-01-07T09:51:52","slug":"mitochondria-much-more-than-just-energy-factories","status":"publish","type":"post","link":"https:\/\/cristinatomasi.com\/en\/i-mitocondri-molto-piu-che-semplici-fabbriche-di-energia\/","title":{"rendered":"The Mitochondria: more than just energy factories"},"content":{"rendered":"
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For decades, mitochondria have been described as the \"powerhouse\" of cells, responsible for ATP production. This definition is correct, but extremely reductive.<\/h2>\n

Today we know that mitochondria are biological regulatory centers<\/span> that affect almost every aspect of our health-from immunity to hormones, metabolism to aging, and cognitive function.<\/h2>\n

The healthier and more efficient our mitochondria are, the better our ability to live, function and regenerate.<\/p>\n

Some key functions of mitochondria:<\/h3>\n

\ud83d\udee1 Mitochondria and Immunity<\/h3>\n

Mitochondria defend not only the cell, but also the whole organism:<\/p>\n

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  • produce ROS (reactive oxygen species) that act as antimicrobial weapons<\/li>\n
  • They regulate the innate immune response, via mtDNA release and MAVS (mitochondrial anti-viral signal) signaling<\/li>\n
  • They regulate macrophage activity (pro-inflammatory or reparative).
    \n\ud83d\udc49 Without efficient mitochondria, the immune system loses power and precision.\ud83e\uddec Hormone production<\/li>\n<\/ul>\n
      \n
    • Steroidogenesis starts in mitochondria: cholesterol is converted topregnenolone (via CYP11A1)<\/li>\n
    • From pregnenolone are then derived testosterone, estrogen, cortisol, and all other steroid hormones<\/li>\n
    • Mitochondria in endocrine cells (testis, ovary, adrenal, brain) are essential for proper hormone balance.\ud83d\udc49 Without healthy mitochondria, hormone production drops dramatically.<\/li>\n<\/ul>\n

       <\/p>\n

      \u2696 Mitochondria and Apoptosis (programmed cell death).<\/h2>\n

      Mitochondria decide the fate of cells.
      \nWhen a cell is damaged, they release cytochrome c, activating the caspase cascade that culminates in programmed cell death.This process is crucial for:<\/h3>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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      • eliminate potentially cancerous cells<\/li>\n
      • eliminate dysfunctional or damaged cells (e.g., cells with mutated DNA, misfolded proteins, or too much oxidative stress).<\/li>\n
      • maintain an efficient immune system<\/li>\n
      • reshape tissues
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        Mitochondria determine which cells live and which die \ud83d\udd25 Mitochondria and Metabolism<\/h2>\n

        Basal metabolism depends largely on mitochondrial density and efficiency.When mitochondria malfunction:<\/p>\n

        oxidation of fats is incomplete ->so leads to lipotoxicity and excess ROS -> which increases inflammation-> as a result there is worsened sensitivity<\/p>\n

        to insulin.<\/li>\n<\/ul>\n

        \ud83d\udc49 Strong mitochondria = efficient metabolism, more energy, less risk of diabetes.<\/p>\n

        \ud83e\udde0 Mitochondria and Brain
        \nThe brain is the organ with the highest mitochondrial density and one of the largest<\/h3>\n

        energy consumers in the body. Neurons, in particular, have unique requirements:<\/p>\n

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        • Need huge amounts of ATP to maintain membrane potentials and synaptic transmission<\/li>\n
        • Require extremely precise control of intracellular calcium levels, regulated largely by mitochondria<\/li>\n
        • depend on mitochondria for synaptic plasticity and the proper release of neurotransmitters (glutamate, GABA, dopamine)When mitochondrial function declines, neurons become vulnerable to oxidative stress and metabolic imbalances: this contributes to cognitive deficits, mood alterations, and neurodegenerative diseases (Parkinson's, Alzheimer's, other types of dementia)\ud83d\udc49 In summary: the health of our brain connections depends directly on the health of our mitochondria.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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          \u23f0 Mitochondria and Circadian Rhythm<\/h3>\n

          Melatonin is not only produced in the pineal gland.
          \nMany tissues (intestine, liver, brain, skin) produce it directly in the mitochondria as an antioxidant and local regulatory molecule.<\/p>\n

          \ud83d\udc49 Pineal melatonin regulates the sleep-wake rhythm.
          \n\ud83d\udc49 Mitochondrial melatonin protects cells from oxidative stress.<\/p>\n

           <\/p>\n

          \ud83d\udca8 Mitochondria, Oxygen, and Vascular Adaptation.<\/h3>\n

          Mitochondria do not just consume oxygen: they sense it and, when levels drop, activate responses that regulate blood flow and oxygenation of the body.<\/p>\n

          \ud83d\udc49 When they perceive low oxygen:<\/p>\n

          1. Increased ROS<\/p>\n

          2. Activation of HIF-1\u03b1<\/p>\n<\/div>\n<\/div>\n

          \u25e6 In small amounts, these ROS are a useful signal that stimulates the endothelium<\/p>\n

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          Mitochondria produce more ROS (reactive oxygen species). to produce NO (nitric oxide).<\/p>\n<\/div>\n<\/div>\n

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          The result is vasodilation: blood vessels dilate, improving blood flow and oxygen distribution.<\/p>\n<\/div>\n<\/div>\n

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          \u25e6 This activates adaptation genes such as:<\/p>\n<\/div>\n<\/div>\n

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          In hypoxia, mitochondria stabilize factor HIF-1\u03b1.<\/p>\n

           <\/p>\n<\/div>\n<\/div>\n

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          \ud83d\udc49 Mitochondria function as oxygen sensors that initiate adaptive responses critical to keeping the body well oxygenated.<\/h3>\n<\/div>\n<\/div>\n
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          VEGF \u2192 stimulates angiogenesis, that is, the formation of new capillaries, increasing the blood supply to tissues.<\/p>\n<\/div>\n<\/div>\n

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          EPO (erythropoietin) \u2192 stimulates red blood cell production, enhancing oxygen transport in the blood.<\/p>\n

           <\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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          \ud83c\udf0d Because everything starts from the mitochondria.<\/h2>\n

          Mitochondria are not simply \"energy factories.\" They are central regulators of life.<\/p>\n

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          • Immunity<\/li>\n
          • Hormones<\/li>\n
          • Brain<\/li>\n
          • Metabolism<\/li>\n
          • Sleep<\/li>\n
          • AgingAll these processes depend on their efficiency.That is why practices that promote health-nutrition, exercise, sleep, exposure to light and nature-have as a common denominator the improvement of mitochondrial function.
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            In the end, the viability of an organism is the viability of its mitochondria.<\/h3>\n<\/li>\n<\/ul>\n

             <\/p>\n

             <\/p>\n

            Thank you for your time, I hope this article has made you discover new things to learn how to take care of your well-being!<\/p>\n

            Oliver<\/strong><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

            Per decenni i mitocondri sono stati descritti come la \u201ccentrale energetica\u201d delle cellule, responsabili della produzione di ATP. Questa definizione e\u0300 corretta, ma estremamente riduttiva. Oggi sappiamo che i mitocondri sono centri di regolazione biologica che influenzano quasi ogni aspetto della nostra salute: dall\u2019immunita\u0300 agli ormoni, dal metabolismo all\u2019invecchiamento, fino alla funzione cognitiva. Piu\u0300 sani […]<\/p>\n","protected":false},"author":7,"featured_media":28457,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[178,1],"tags":[180],"class_list":["post-28456","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-benessere","category-non-categorizzato","tag-mitocondri"],"_links":{"self":[{"href":"https:\/\/cristinatomasi.com\/en\/wp-json\/wp\/v2\/posts\/28456","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cristinatomasi.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cristinatomasi.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cristinatomasi.com\/en\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/cristinatomasi.com\/en\/wp-json\/wp\/v2\/comments?post=28456"}],"version-history":[{"count":0,"href":"https:\/\/cristinatomasi.com\/en\/wp-json\/wp\/v2\/posts\/28456\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cristinatomasi.com\/en\/wp-json\/wp\/v2\/media\/28457"}],"wp:attachment":[{"href":"https:\/\/cristinatomasi.com\/en\/wp-json\/wp\/v2\/media?parent=28456"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cristinatomasi.com\/en\/wp-json\/wp\/v2\/categories?post=28456"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cristinatomasi.com\/en\/wp-json\/wp\/v2\/tags?post=28456"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}