DIM (Di-indolymethane) PHARMACOLOGY Di-Indolylmethane (DIM) and indole-3-carbinole (I3C) DESCRIPTION Di-indolylmethane (DIM) is two indole-3-carbinole (I3C) molecules bonded together. Brassica vegetables such as broccoli, Brussel sprouts and cabbages are rich in the phytochemical I3C and also contain DIM in smaller quantities. Their general uses are in aiding estrogen metabolism, the treatment and prevention of cancers, (particularly cervical and prostate) and even weight control. They can act as a protection against the increasing amount of estrogens and estrogen type substances, that are leaking into the environment and food/ water-chain from phytoestrogens such as, pesticides and plastics, (which have been linked to an increased risk of cancer). DIM and I3C help to reduce the risk of these “hormone-related cancers” for both men and women, this includes those on hormone replacement therapies. Clinical trials have reversed and remised 50% of stage 2 and stage 3 cervical cancers within a 12 week periods for 50% of women using I3C. Similar effects with prostrate conditions have been observed, with 40% of men’s prostrate problems responding positively to I3C within a comparable period. ACTION Specifically, DIM and I3C stimulate more efficient estrogen metabolism. In order for estrogen to be modified into its final form to be urinated out of the body, it has to combine with oxygen as part of aerobic metabolism. DIM and I3C can help to multiply and improve this process. Women’s estrogen ratios alter with age, particularly after the menopause and hence the ratio alters (estriol compared to the total amounts of estradiol and estrone), increasing the risk of cancers. Women who are on hormone replacement therapy using estrogen, (particularly the alien horse hormones) are known to have an increased risk of cancer, especially breast cancer. Men are also at risk because testosterone is converted by the chemical aromatase into estradiol. An imbalance between estrogen and testosterone appears to heighten the likelihood of a prostrate condition, such as cancer. However, the body is able to metabolize estradiol into the non-carcinogenic estrone, and then the potential anti-carcinogenic estriol, using DIM and I3C. One study has shown that eating 3 portions of Brassica vegetables a day can cut the risk of prostrate cancer by as much as 48%. As for its weight loss benefits, estrogen helps us to “put on weight.” As DIM and I3C help to control and eliminate estrogen, it may help us in weight control, particularly the muscle-fat ratio. INDICATIONS - a) Environmental toxins (through estrogen metabolism).
- b) Cancer (particularly cervical and prostate).
- c) Weight control.
CONTRAINDICATIONS Antacids and H2 Blockers (such as ZantacŪ) can inhibit the effectiveness of I3C, but appear to have little effect on DIM. SIDE EFFECTS Side effects are mainly confined to flatulence, stomach ache and nausea. The effects tend to pass with continued or lowered dosages. DOSAGE Precise dosages of both substances have yet to be confirmed, but obviously dosages need to raised and lowered depending upon the need etc. For example, if cancer was already prevalent or likely (i.e. high risk group) then dosages have to be higher. As a general preventative and useful ration, dosages of DIM are suggested at approximately 1mg per KG bodyweight (2.2m Lbs), thus 75mg for a 165Lbs person. However, dosages have gone as high as 8mg per Kg bodyweight in cancer treatments. CAUTIONS None known HOW SUPPLIED Capsules of DIM as 25mg, 30mg, 50mg, 60mg, 75mg and 100mg. Capsules of I3C as 50mg, 100mg, 200mg and 300mg Some capsules contain a mixture of both, for example a ratio of 60mg DIM and 200mg I3C. NOTES It is interesting to note that DIM is ten times more potent mg/mg than I3C. Recent studies indicate that whilst DIM is likely to be the main active ingredient, I3C can be transformed into DIM in stomach acid. Oral and injectable forms of DIM have been successful, although only the same can be said of oral I3C. Injectable I3C has shown little effect in investigations. REFERENCES - Phytoestrogens, potential endocrine disrupters. Toxicol. Lett., 1998, 102-3: 349-54.
- JAMA, 1986; 256: 1141-7.
- Cancer Res., 1992; 52: 2447-55.
- Cancer, 1999, 85: 1353-60.
- American Journal Ind. Med., 1998; 82-7.
- Wright JV, Morgenthaler J. Natural Hormone Replacement for Women over 45, Smart Publications, Petaluma, California, 1997, pages 87-98.
- Bradlow HL, et al. 2- Hydroxyextrone: the “good” estrogen, J Endocrinol 1996; 150: S259-S265.
- Ho GH, et al. Using 2/16 alpha hydroxyestrone ratio: correlation with serum insulin-like growth factor binding protein 3 and a potential biomarker of breast cancer risk. Ann Acad Med Singapore 1998; 27: 294-299.
- Cavalieri EL, et al. Molecular origin of cancer: Catechol estrogen-3-4 quinones as endogenous tumor initiators. Proc Natl. Acad. Sci. USA 1997; 94: 10937-10942.
- Wright JV, Lenard L. Maximize Your Vitality and Potency, Smart Publications, Petaluma, California, 1999, pages 153-171.
- Veggies may cut half risk of prostate cancer, Seattle Times, Tuesday January 4, 2000, page 1. Original Research to be printed in the Journal of the National Cancer Institute for January 5, 2000. Authors: Kristal A, Cohen J, Stanford J.
- Kali MA, Vang O, Klausen J. Effects of dietary broccoli on human drug metabolizing activity. Cancer Letters 1997; 114: 169-170, and Effects of dietary broccoli on human vivo drug metabolizing enzymes. Carcinogenesis 1996; 17: 793-799.
- Bradlow HL et al. Indole-3-carbinol: A novel approach to breast cancer prevention. Ann NY Acad Sci 1996; 768: 180-200.
- Jellinck PH et al. Ah receptor binding properties of indole carbinols and induction of hepatic estradiol hydroxylation. Biochem Pharmacol 1993; 45:1129-1136.
- Grubbs CJ et al, Chemo-prevention of chemically induced mammary carcinogenesis by indole-3-carbinol, Anticancer Research 1995; 15: 709-716.
- Haggans CJ et al. Effect of flazseed consumption on urinary estrogen metabolites in postmenopausal women. Nutr Cancer 1999; 33: 188-196.
- Cree M, et al. Altered urinary excretion of 2-hydroxyestrone to 16-hydroxyextrone in women after soya isoflavone consumption, Proc Am Assoc Canc. Res 1999; 40: 302 Abstract 2007.
- Giovannuci E. Tomatoes, tomato-based products, lycopene, and cancer: review of the epidemiologic literature. J Natl Cancer Inst 1999; 91 (4): 317-331.
- Gerson, Max. A cancer therapy: results of 50 cases. 3rd edition. Totality Books, Del Mar, California, 1977. Pages 205-206, 409.
- Gillner M, et al. Interactions of indoles with specific binding sites for 2,3,7,8-tetrachlorodibenzo-p-dioxin in rat liver. Mol Pharm 28:357-63.
- Wattenberg LW, et al. 1978. Inhibition of polycyclic aromatic hydrocarbon-induced neoplasia by naturally occurring indoles. Cancer Res 38:1410-13.
- Chang YC, et al. 1999. Cytostatic and antiestrogenic effects of 2-(indole-3-ylmethyl)-3,3’-diindolylmethane, a major in vivo product of dietary indole-3-carbinol. Biochem Pharm 58:825-34.
- Meng Q, et al. 2000. Indole-3-carbinol is a negative regulator of estrogen receptor- signaling in human tumor cells. J Nutr 130:2927-31.
- Grose KR, et al. 1992. Oligomerization of indole-3-carbinol in aqueous acid. Chem Res Toxicol 5:188-93.
- Chang YC, et al. 1999. Cytostatic and antiestrogenic effects of 2-(indole-3-ylmethyl)-3,3’-diindolylmethane, a major in vivo product of dietary indole-3-carbinol. Biochem Pharmacol 58:825-34.
- Riby JE, et al. 2000. Ligand-independent activation of estrogen receptor function by 3,3’-diindolylmethane in human breast cancer cells. Biochem Pharm 60:167-77.
- Chen I, et al. Aryl hydrocarbon receptor-mediated antiestrogenic and antitumorigenic activity of diindolylmethane. Carcinogenesis 19:1631-9.
- Jellinck PH, et al. 1994. Distinct forms of hepatic androgen 6 beta-hydroxylase induced in the rat by indole-3-carbinol and pregnenolone carbonitrile. J Steroid Biochem Mol Biol 51:219-25.
- Cover CM, et al. 1998. Indole-3-carbinol inhibits the expression of cyclin-dependent kinase-6 and induces a G1 cell cycle arrest of human breast cancer cells independent of estrogen receptor signaling. J Biol Chem 273:3838-47.
- Sanderson JT, et al. 2001. 2,3,7,8-Tetrachlorodibenzo-p-dioxin and diindolylmethanes differentially induce cytochrome p450 1A1, 1B1, and a19 in H295R human adrenocortical carcinoma cells. Toxicol Sci 61:40-48.
- Jellinck PH, et al. 1993. Ah receptor binding properties of indole carbinols and induction of hepatic estradiol hydroxylation. Biochem Pharmacol 45:1129-36.
- Sonderfan AJ, et al. 1989. Identification of the cytochrome P-450 isozymes responsible for testosterone oxidation in rat lung, kidney, and testis: evidence that cytochrome P-450a (P450IIA1) is the physiologically important testosterone 7 alpha-hydroxylase in rat testis.
- Jellinck PH, et al. 1994. Distinct forms of hepatic androgen 6 beta-hydroxylase induced in the rat by indole-3-carbinol and pregnenolone carbonitrile. J Steroid Biochem Mol Biol 51:219-25.
- Riby JE, et al. 2000. Ligand-independent activation of estrogen receptor function by 3,3’-diindolylmethane in human breast cancer cells. Biochem Pharm 60:167-77.
- Preobrazhenskaya MN. 1993. (Meeting abstract). Ascorbigen as anticarcinogenic dietary constituent of cabbage. Non-serial; CCPC-1993: Second International Cancer Chemo Prevention Conference. April 28-30, 1993, Berlin, Germany:109.
|