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| Inositol is a form of sugar your body needs to grow. myo-inositol is a sugar alcohol and a glucose isomer found in many food including grains and fruits. Inositol — Inositol is a naturally occurring six-carbon cyclitol (sugar alcohol-like carbohydrate), with myo-inositol being the predominant biologically active stereoisomer in humans and the form most commonly used as an oral supplement. It is formally classified as a nutrient/metabolic signaling molecule rather than an established anticancer drug; common abbreviations include MI, myo-Ins, and Ins. Myo-inositol is obtained from foods and is also synthesized endogenously from glucose-6-phosphate through ISYNA1-dependent metabolism. It is a precursor for phosphatidylinositol and phosphoinositide second-messenger systems. Myo-inositol should be distinguished from inositol hexaphosphate (IP6/phytic acid), which has substantially more preclinical anticancer literature and is listed separately in this database. Primary mechanisms (ranked):
Bioavailability / PK relevance: Myo-inositol is orally absorbed through sodium-dependent inositol transport systems, with human serum concentrations peaking approximately 1.5–3 hours after oral administration. A 100 mg/kg oral dose produced an estimated peak serum concentration of about 100 µM in a small human kinetic study. Bioavailability varies with formulation and can be reduced by competing D-chiro-inositol and some sugars/transporter substrates. Renal elimination is important. High-dose oncology studies have used approximately 18 g/day; gastrointestinal intolerance becomes dose-limiting at higher doses. In-vitro vs systemic exposure relevance: Exposure is concentration-driven. A recent DU-145 prostate-cancer study reported an approximate myo-inositol IC50 of 0.06 mg/mL after 72 hours, equivalent to about 330 µM; this is several-fold above the approximately 100 µM peak serum concentration observed after a 100 mg/kg oral human dose, although substantially higher oral doses have been used clinically. Some mechanistic experiments use still higher concentrations, so direct systemic translation of in-vitro cytotoxicity should be interpreted cautiously. Chemopreventive and signaling effects may occur below directly cytotoxic concentrations. Clinical evidence status: RCT-level chemoprevention evidence but no demonstrated anticancer efficacy. A randomized double-blind phase IIb trial used myo-inositol 9 g twice daily for six months in smokers with bronchial dysplasia. It did not significantly improve the primary dysplasia-response endpoint versus placebo, although BAL IL-6 decreased and responders showed reduced airway PI3K-activation signatures. Earlier phase I work established approximately 18 g/day as a tolerated dose and suggested lesion-regression activity. Myo-inositol is therefore best classified as an experimental chemopreventive/metabolic adjunct rather than an established cancer treatment. Inositol Cancer-Relevant Mechanisms
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| Destruction of mitochondrial transmembrane potential, which is widely regarded as one of the earliest events in the process of cell apoptosis. Mitochondria are organelles within eukaryotic cells that produce adenosine triphosphate (ATP), the main energy molecule used by the cell. For this reason, the mitochondrion is sometimes referred to as “the powerhouse of the cell”. Mitochondria produce ATP through process of cellular respiration—specifically, aerobic respiration, which requires oxygen. The citric acid cycle, or Krebs cycle, takes place in the mitochondria. The mitochondrial membrane potential is widely used in assessing mitochondrial function as it relates to the mitochondrial capacity of ATP generation by oxidative phosphorylation. The mitochondrial membrane potential is a reliable indicator of mitochondrial health. In cancer cells, ΔΨm is often decreased, which can lead to changes in cellular metabolism, increased glycolysis, increased reactive oxygen species (ROS) production, and altered cell death pathways. The membrane of malignant mitochondria is hyperpolarized (−220 mV) in comparison to their healthy counterparts (−160 mV), which facilitates the penetration of positively charged molecules to the cancer cells mitochondria. The MMP is a critical indicator of mitochondrial function, directly reflecting the organelle's capacity to generate ATP through oxidative phosphorylation. |
| 7636- | Ins, | Myo-Inositol: Pharmacokinetics, Biological Functions, and Therapeutic Potential in Liver Protection: Insights from Preclinical Models |
Query results interpretion may depend on "conditions" listed in the research papers. Such Conditions may include : -low or high Dose -format for product, such as nano of lipid formations -different cell line effects -synergies with other products -if effect was for normal or cancerous cells
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