on July 24, 2026
Neoplastic pathogenesis represents a multistage process driven by the progressive accumulation of genomic mutations, capable of altering the physiological mechanisms of cell proliferation and differentiation. Although exposure to carcinogenic agents (radiation, aflatoxins, cigarette smoke, infectious agents) or random errors during replication increases DNA damage, the body has endogenous repair systems and a complex network of immune and metabolic surveillance. The tumor microenvironment plays a crucial role: a chronically inflammatory tissue context generates reactive oxygen species (ROS) and pro-mutagenic molecules that promote the survival, invasiveness, and metastatic progression of transformed cells.
Physiology of Physical Exercise: Direct and Indirect Mechanisms
Physical activity represents one of the main behavioral safeguards capable of modulating cancer risk through direct and indirect biological pathways.
Among the indirect effects, exercise promotes the reduction of visceral adiposity, the regularization of vitamin D synthesis levels (also thanks to sun exposure), and the improvement of psychological state. Body weight control directly counters adipose tissue hypertrophy, a condition characterized by reduced adiponectin secretion and increased release of free fatty acids (FFA). This pattern supports low-grade systemic inflammation and the onset of insulin resistance with compensatory hyperinsulinemia.
On the level of direct biochemical pathways, physical exercise intervenes on multiple cellular and enzymatic targets:
· Metabolic Axes and Apoptosis: A significant reduction in circulating levels of Insulin-like Growth Factor 1 (IGF-1) is observed. The lowering of IGF-1 inhibits pro-survival molecular pathways that block apoptosis, limiting neoplastic proliferation and angiogenesis.
· Genomic Repair and Antioxidant Enzymes: Physical activity increases the expression of genes responsible for DNA repair processes and induces the expression of endogenous scavenger enzymes such as superoxide dismutase (SOD), catalase, and glutathione peroxidase, enhancing defenses against environmental carcinogens.
· Inflammation Modulation and Immune Surveillance: A simultaneous downregulation of pro-inflammatory cytokines (Tumor Necrosis Factor-α, Interleukin-6), C-reactive protein (CRP), and prostaglandins is recorded, combined with an immune system stimulus that shows a numerical and functional increase in white blood cells and Natural Killer (NK) cells.
Molecular Nutrition and Intestinal Microenvironment
The intake of plant matrices with high micronutrient density (fruit, vegetables, legumes, whole grains, nuts, and spices) ensures a balanced intake of water, fiber, and phytocompounds with cytoprotective activity.
The protective effect of dietary fiber, recommended by SINU with a daily intake of at least 25 grams, is particularly marked in colorectal carcinoma and is explained through:
1. Reduction of transit time: Shorter contact duration between the colonic epithelium and potential luminal carcinogenic metabolites.
2. Fermentation and short-chain fatty acids (SCFA): The soluble fraction is converted by the microbiota into SCFA, in particular butyrate. This compound acts as an epigenetic modulator, inducing cell cycle arrest and selective apoptosis in mutated colonic cells, while maintaining the homeostasis of healthy colonocytes.
Among the bioactive phytocompounds, soy isoflavones (genistein and daidzein) and their metabolite derived from the intestinal microbiota biotransformation, equol, act as selective estrogen receptor modulators (SERM). Depending on the endogenous hormonal concentration, they can exert an antagonistic action capable of inhibiting proliferation in hormone-dependent tumors.
Controlled caloric restriction promotes the activation of autophagy pathways and cellular longevity, protecting healthy tissues from premalignant lesions. Furthermore, molecules such as epigallocatechin-3-gallate (EGCG) from green tea, folates, and sulforaphane derived from brassicaceae intervene in cell cycle checkpoints, preventing the fixation of mutations.
Immunomodulation and Receptor Signaling: Vitamin D
Beyond its classic role in calcium-phosphorus metabolism (increased intestinal reabsorption, reduced renal excretion, parathormone inhibition), vitamin D (through its active metabolite 1,25(OH)₂D₃) interacts directly with VDR receptors present on lymphocytes and neoplastic cells. This interaction regulates the adaptive and innate immune response and promotes antiproliferative, pro-differentiation, and pro-apoptotic mechanisms in tumor tissues.
Clinical and Preclinical Evidence in Phytotherapy and Aromatherapy
Scientific research applied to oncological phytotherapy has documented the efficacy of several plant extracts both in the management of symptoms from conventional treatments and in the direct inhibition of tumor lines.
· Zingiber officinale (Ginger): Extensive scientific documentation supports its use for the control of nausea and vomiting induced by chemotherapy (CINV), thanks to the antagonistic action of gingerols on 5-HT3 serotonergic receptors.
· Silybum marianum (Milk Thistle): In a randomized double-blind placebo-controlled clinical study conducted on women with breast carcinoma undergoing radiotherapy, the prophylactic application of a gel based on 1% silymarin for five weeks significantly reduced the severity of radiodermatitis, delaying its onset.
· Thyme Honey: In a randomized controlled study (RCT) conducted on 72 patients with head and neck carcinoma undergoing radiotherapy, oral rinses with thyme honey showed a significant reduction in the incidence and severity of oral mucositis (evaluated through the RTOG scale) compared to the control group (water and salt), with benefits confirmed at the follow-up.
· Artemisinin and derivatives (Artemisia annua): For over a decade, the cytotoxic activity of artemisinin against various tumor lines has been known. In preclinical models, the molecule reacts with intracellular iron ions generating targeted oxidative stress that leads to the death of the neoplastic cell, maintaining a tolerability profile free of significant systemic toxicity.
· Hemidesmus indicus (Indian Sarsaparilla): A study by the University of Bologna published in Oncotarget highlighted that Indian Sarsaparilla is capable of triggering immunogenic cell death. This process kills tumor cells and simultaneously exposes their antigenic epitopes, stimulating the recognition and active recruitment of the immune system.
· Aspilia spp.: Preliminary research conducted on species of the genus Aspilia (used in traditional African medicine) shows a marked selective cytotoxicity against malignant cells, sparing healthy tissues.
· Essential Oils and Perilla Alcohol: Although over 500 preclinical studies have tested the antitumor activity of essential oils (including Cymbopogon spp., Curcuma longa, and citrus fruits rich in limonene), clinical research has not yet provided direct evidence of curative efficacy on human cancer. Perilla alcohol (Perilla frutescens), evaluated in phase II trials, did not show clinical anticarcinogenic activity in ovarian, colorectal, and breast tumors, with preliminary findings limited only to recurrent malignant gliomas.
· Aromatherapy: The inhalation use of essential oils remains a valid complementary support in oncology. This method guarantees a high safety profile, minimizing the risks of systemic toxicity or skin sensitization, useful in the management of patient anxiety and emotional distress.
Bibliographic References
1. Bailey, H. H., et al. (2002). Phase II trial of oral perillyl alcohol in patients with metastatic colorectal cancer. International Journal of Oncology, 21(2), 393-399.
2. Bailey, H. H., et al. (2008). Phase II study of daily oral perillyl alcohol in patients with advanced ovarian cancer. Cancer Chemotherapy and Pharmacology, 62(1), 149-157.
3. Bayala, B., et al. (2014). Antitumor activity of essential oils and their chemical constituents: a review. Organic and Medicinal Chemistry Letters, 4(1), 1-11.
4. da Fonseca, C. O., et al. (2008). A randomized phase II study of perillyl alcohol inhalation in patients with recurrent malignant glioma. Journal of Cancer Research and Clinical Oncology, 134(10), 1079-1086.
5. Meadows, G. G., et al. (2002). Phase II trial of perillyl alcohol in patients with metastatic breast cancer. Breast Cancer Research and Treatment, 73(3), 205-212.
6. Zelek, L., et al. (Oncotarget Study Group / University of Bologna). Cytotoxic and immunogenic cell death induction by Hemidesmus indicus in tumor models. Oncotarget, 2017.
7. World Cancer Research Fund / American Institute for Cancer Research. (2018). Diet, Nutrition, Physical Activity and Cancer: a Global Perspective. Continuous Update Project Expert Report.
