In contrast, zeolites with higher silica content, such as clinoptilolite, are stable in acids (Payra and Dutta, 2003). For example, selectivity alignments of the zeolite clinoptilolite cation exchange have been given as Ba2+> Cu2+, Zn2+> Cd2+, Sr2+> Co2+ by Blanchard et al. These symptoms may be a consequence of typical athletes diets with high protein content, as in such circumstances excessive protein fermentation may occur and is accompanied by higher ammonia release in the intestine as well. Oral consumption of this type of zeolite, due to its extreme chemical stability, in EFSAs opinion, does not represent a potential risk for in vivo applications (EFSA Panel on Additives and Products or Substances used in Animal Feed, 2013). (2015). Sorption hysteresis of Cd(II) and Pb(II) on natural zeolite and bentonite. Selvam T., Schwieger W., Dathe W. (2014). In this preclinical toxicology study, tribomechanically micronized clinoptilolite was evaluated at the Ruer Bokovi Institute in Zagreb, Croatia, according to the standards and regulations required at the time by the OECD. In this paper, the cited literature on clinoptilolite effects in vitro and in vivo provides data for clinoptilolite materials (tuffs) from different sources/continents, of different purity, chemical composition, and that were prepared for oral application by use of different milling processing methods. Indeed, a role of IgA was already described in the reduction of intestinal pro-inflammatory signaling and bacterial epitope expression as part of the innate immune mechanism that contributes to balancing antibodies negative impact on the micriobiota status (Round and Mazmanian, 2009).
The depletion of hydrogen peroxide and the increased ROS production during hydrogen peroxide reaction with a clinoptilolite surface may change the redox status of the cell, e.g., through inhibition of the transcription factor Nrf2. The widely tested zeolite suitable for medical applications in vivo is the clinoptilolite tuff but the mordenite tuff was also studied by Selvam et al. Nano- and microsized zeolites as a perspective material for potentiometric biosensors creation. EFSA Panel on Additives and Products or Substances used in Animal Feed (2013). Aikoh T., Tomokuni A., Matsukii T., Hyodoh F., Ueki H., Otsuki T., et al. Other routes and factors may induce ROS in the organism as well, such as ROS produced through the activity of xanthine oxidase, in reactions of hypoxanthine to xanthine and xanthine to uric acid conversions, where molecular oxygen is reduced to superoxide anion, followed by a generation of hydrogen peroxide (Valko et al., 2004). It can generally be stated that clinoptilolite loaded with potential toxicants in the intestine is then excreted along with toxicants (EFSA Panel on Additives and Products or Substances used in Animal Feed, 2013). Toxicity of lead: a review with recent updates. *Correspondence: Sandra Kraljevi Paveli, This article was submitted to Translational Pharmacology, a section of the journal Frontiers in Pharmacology. Careers, Edited by: Lei Xi, Virginia Commonwealth University, United States, Reviewed by: Panagiotis Dimitrios Katsoulos, Aristotle University of Thessaloniki, Greece; Stephane Nizet, GLOCK Health, Science and Research G.m.b.H., Austria. Therefore, it is possible that the contact between clinoptilolite and tumor cells with increased hydrogen peroxide concentrations induces formation of free radicals; therefore, increases in the oxidative burden occur in tumor cells, which consequently die. Zeolite catalysts as enzyme mimics. Moreover, upon prolonged supplementation in chicken, both tested clinoptilolite materials increased the activities of glutathione peroxidase, catalase, total SOD, and the total antioxidant capacity (Wu Q.J. For example, the kaolinite structure may change during the ion-exchange processes due to the displacement of H+ ions or due to the swelling of the structure as a consequence of Pb, Zn, or Cd cations absorption, which is opposite to the clinoptilolite constancy during ion-exchange process (Miranda-Trevino and Coles, 2003). Characterization of kaolin dispersion using acoustic and electroacoustic spectroscopy. zeolite tem Peroxiredoxin 1 - an antioxidant enzyme in cancer. The mineral structure is based on AlO4 and SiO4 tetrahedra, which can share 1, 2, or 3 oxygen atoms, so there is a wide variety of possible structures as the network is extended in three dimensions. This might be highly relevant for the survival of cancer cells as Nrf2 bears a proliferative role. This immunomodulatory effect of clinoptilolite was speculated to be the so-called silicate superantigen response. From this perspective, clinoptilolite was evaluated in a recent trial performed on aerobically trained subjects (Lamprecht et al., 2015). Moreover, in cases where diarrhea symptoms were removed and the pathogenic agent was identified upon Enterex treatment antibiotics were additionally used to completely eliminate pathogenic bacteria from the intestinal lumen (Rodrguez-Fuentes et al., 1997). We focus on the safety of the clinoptilolite material and the positive medical effects related to detoxification, immune response, and the general health status. In case of antioxidant enzymes, these co-factors may include the coenzyme Q10, vitamins B1 and B2, carnitine, selenium, and often transition metals Cu, Mn, Fe, and Zn (Khalid, 2007). Sincai M., Argherie D., Ganga D., Bica D. (2007). Lactic acid bacteria improves Peyers patch cell-mediated Immunoglobulin A and tight-junction expression in a destructed gut microbial environment. (1998). A neuroprotective effect was also documented by Basha et al. Still, the clinoptilolite ion-exchange effects in vivo are complex and cannot be linearly explained as they are not affected only by the environmental conditions (pH, temperature, etc.) (2007). vaccines destroys immunity weakens zeolite In a study performed by Ivkovic et al. Role of oxygen radicals in DNA damage and cancer incidence. 
The site is secure. In addition to these antioxidant systems inherent to the body, other exogenous antioxidants are important in the regulation of constant bodys ROS homeostasis as well. New, natural possibilities for improvement of animal health in meat production have therefore been widely discussed (Diaz-Sanchez et al., 2015) and clinoptilolite may be a natural alternative.
Indeed, in previous in vitro experiments on tumor cells, clinoptilolite antitumor effects were attributed to the modulation of the EGF-R, protein kinase B (PKB)/Akt, and nuclear factor kB (NfkB) signaling. Miranda-Daz A. G., Pazarn-Villaseor L., Yanowsky-Escatell F. G., Andrade-Sierra J. KP performed literature search related to clinical aspects and toxicology, discussed clinical aspects, and helped to draft the manuscript. (2015). Ammonium sorption from aqueous solutions by the natural zeolite transcarpathian clinoptilolite studied under dynamic conditions. Bingham S., colonic protein metabolism and colorectal cancer. Mitochondrial Generation of reactive oxygen species and its role in aerobic life. Importantly, no effects on the protein retention values were observed and the protein deposition was not altered (Poulsen and Oksbjerg, 1995; Laurino and Palmieri, 2015). Martin-Kleiner I., Flegar-Metri Z., Zadro R., Breljak D., Stanovi Janda S., Stojkovi R., et al. It is plausible, therefore, to assume that such disorders have the formation of biofilms in common due to the impaired immunological reaction of the host organism (Pincus, 2005). Studies on free radicals, antioxidants, and co-factors. Therefore, we propose that this clinoptilolite-induced M-cells communication with Peyers patches, as similarly shown by Pavelic et al. Polyclonal human T-cell activation by silicate in vitro.
8600 Rockville Pike Scientific Opinion on the safety and efficacy of clinoptilolite of sedimentary origin for all animal species. (2017). Silicic acid in drinking water prevents age-related alterations in the endothelium-dependent vascular relaxation modulating eNOS and AQP1 expression in experimental mice: an immunohistochemical study. Assessment of Pb retention coefficient and nutrient utilization in growing pigs fed diets with added clinoptilolite. (2018). Another clinical study on human subjects showed detoxifying effectiveness of clinoptilolite. Mallek Z., Fendri I., Khannous L., Ben Hassena A., Traore A. I., Ayadi M.-A., et al. In Zeolite A, the Al-framework is balanced out by the maximum number of cation exchange sites; it has high cation contents and superior exchange capacities. Lymphocytes stimulation by silicates, which also act as superantigens, was already shown for different silicate materials in in vitro conditions and this mechanism may underlie immunomodulation activity of clinoptilolite in the intestine as well (Ueki et al., 1994; Aikoh et al., 1998). Hamidpour M., Kalbasi M., Afyuni M., Shariatmadari H., Holm P. E., Hansen H. C. (2010). Adsorption of water by clinoptilolite and glauconite. (1994). When hepatectomized rats were supplemented with a micronized clinoptilolite preparation, Froximun, MDA levels were significantly lower, while liver tissue antioxidant mechanisms were strengthened, as witnessed by a significantly higher activity of Cu-Zn SOD and GSH (Saribeyoglu, 2011). Similarly, in doxorubicin treated mice, micronized clinoptilolite proved efficient in counteracting lipid peroxidation in the liver (Zarkovic et al., 2003). in: biocatalysis and biomimetics.
(2015) where clinoptilolite still proved highly efficient in the reduction of veisalgia symptoms and signs up to 4050%. This structural stability is an essential element for in vivo applications.
EFSA evaluated and proved the zeolite-clinoptilolite non-toxicity for animal feed at doses of 10000 mg/kg. 770827, the Serbian Ministry of Education and Science Project III44006, the Slovenian Research Agency (ARRS) Project Grant No. Also, the administration of clinoptilolite materials did not affect the binding of 3H8-OH-DPAT to the studied receptors during prolonged administration. (2015). natural cellular defense clinoptilolite Clinical evidence supporting the use of an activated clinoptilolite suspension as an agent to increase urinary excretion of toxic heavy metals.
This central clinoptilolite characteristic related to elimination of toxic agents, which may be seen as a support to the body homeostasis, could be widely exploited in a number of medical applications. Superantigens bind to the variable V region of the T-cell receptor or to CD28 and do not follow the peptide-binding pattern. Baerlocher C. H., McCusker L. B., Olson D. H. (2007). Reactive oxygen species regulate T cell immune response in the tumor microenvironment. A well-known and complex relationship between exercise and oxidative stress depends on many diverse factors. Before Natural zeolites: Clinoptilolite Review, in. (2004) where no adverse reactions to tribomechanically micronized clinoptilolite supplementation were observed in immunodeficient patients. Recently, a new hypothesis has been suggested on the use of lipophilic anions that target cancer cells due to their distinct electrical properties (Forrest, 2015). zeolites
(2005a), for instance, showed that the clinoptilolite supplementation reduced its incidence and did not affect serum concentrations of total calcium, phosphate, magnesium, potassium, and sodium. The Pb leaching percentage may, in the authors opinion, be generally correlated with an increasing initial load but is not affected by the agitation rate or particle size. Ghiara M. R., Petti C., Franco E., Lonis R., Luxoro S., Gnazzo L. (1999). Nizet S., Muoz E., Fiebich B. L., Abuja P. M., Kashofer K., Katloukal K., et al.