1st Institute of Pathology and Experimental Cancer Research, Semmelweis University, Budapest, Hungary. zalatnai@korb1.sote.hu

It has been demonstrated for the first time that a wheat germ extract prevents colonic cancer in laboratory animals. Four-week-old inbred male F-344 rats were used in the study. Colon carcinogenesis has been induced by azoxymethane (AOM). Ten rats served as untreated controls (group 1). For the treatment of the animals in group 2, AOM was dissolved in physiologic saline and the animals were given three subcutaneous injections 1 week apart, 15 mg/kg body weight (b/w) each. In two additional groups Avemar (MSC), a fermented wheat germ extract standardized to 2,6-dimethoxy-p-benzoquinone was administered as a tentative chemo-preventive agent. MSC was dissolved in water and was given by gavage at a dose of 3 g/kg b/w once a day. In group 3, animals started to receive MSC 2 weeks prior to the first injection of AOM daily and continuously thereafter until they were killed 32 weeks later. In group 4 the basal diet and MSC were administered only. At the end of the experiment all the rats were killed by exsanguination, the abdominal large vessels were cut under a light ether anesthesia and a complete autopsy was performed. Percentage of animals developing colon tumors and number of tumors per animals: group 1 - 0 and 0; group 2- 83.0 and 2.3; group 3 - 44.8 (P < 0.001) and 1.3 (P < 0.004), group 4 - 0 and 0. All the tumors were of neoplastic nature also histologically. The numbers of the aberrant crypt foci (ACF) per area (cm(2)) in group 2 were 4.85 while in group 3 the ACF numbers were 2.03 only (P < 0.0001).

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MSC (Avemar) is a medical nutriment of which preclinical and observational clinical studies suggested an antimetastatic activity with no toxicity. This open-label cohort trial has compared anticancer treatments plus MSC (9 g once daily) vs anticancer treatments alone in colorectal patients, enrolled from three oncosurgical centres; cohort allocation was on the basis of patients’ choice. Sixty-six colorectal cancer patients received MSC supplement for more than 6 months and 104 patients served as controls (anticancer therapies alone): no statistical difference was noted in the time from diagnosis to the last visit between the two groups. End-point analysis revealed that progression-related events were significantly less frequent in the MSC group (new recurrences: 3.0 vs 17.3%, P<0.01; new metastases: 7.6 vs 23.1%, P<0.01; deaths: 12.1 vs 31.7%, P<0.01). Survival analysis showed significant improvements in the MSC group regarding progression-free (P=0.0184) and overall survivals (P=0.0278) probabilities. Survival predictors in Cox’s proportional hazards were UICC stage and MSC treatment. Continuous supplementation of anticancer therapies with MSC for more than 6 months is beneficial to patients with colorectal cancer in terms of overall and progression-free survival.

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Biromedicina Elso Magyar Rákkutatási Részvénytársaság, Budapest. elek.farkas@biromedicina.com

The role of the product in the treatment of colorectal cancer is reviewed in the light of experimental and clinical results to date. The fermented wheat germ extract (code name: MSC, trade name: Avemar) registered as a dietary food for special medical purposes for cancer patients to complement the active oncotherapy, exerted a growth inhibitory effect in HCR-25 human colon carcinoma xenograft, and had a synergistic effect with 5-FU in mouse C-38 colorectal carcinoma. The product is capable of chemoprevention of colon carcinoma in F-344 rats. One of the most significant underlying mechanism is a highly cancer cell specific induction of caspase-3 mediated cleavage of PARP. In the frame of supportive therapy, fermented wheat germ extract proved to be efficient in the treatment of colorectal cancer in humans.
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