Daucosterol from Crateva adansonii DC (Capparaceae) reduces 7,12-dimethylbenz(a)anthracene-induced mammary tumors in Wistar rats

Natural Sources, Pharmacological Properties, and Health Benefits of Daucosterol: Versatility of Actions

Daucosterol is a saponin present in various natural sources, including medicinal plant families. This secondary metabolite is produced at different contents depending on species, extraction techniques, and plant parts used. Currently, daucosterol has been tested and explored for its various biological activities. The results reveal potential pharmacological properties such as antioxidant, antidiabetic, hypolipidemic, anti-inflammatory, immunomodulatory, neuroprotective, and anticancer. Indeed, daucosterol possesses important anticancer effects in many signaling pathways, such as an increase in pro-apoptotic proteins Bax and Bcl2, a decrease in the Bcl-2/Bax ratio, upregulation of the phosphatase and tensin homolog (PTEN) gene, inhibition of the PI3K/Akt pathway, and distortion of cell-cycle progression and tumor cell evolution. Its neuroprotective effect is via decreased caspase-3 activation in neurons and during simulated reperfusion (OGD/R), increased IGF1 protein expression (decreasing the downregulation of p-AKT3 and p-GSK-3b4), and activation of the AKT5 signaling pathway. At the same time, daucosterol inhibits key glucose metabolism enzymes to keep blood sugar levels within normal ranges. Therefore, this review describes the principal research on the pharmacological activities of daucosterol and the mechanisms of action underlying some of these effects. Moreover, further investigation of pharmacodynamics, pharmacokinetics, and toxicology are suggested.

Assessment of Wheat Germ Oil Role in the Prevention of Induced Breast Cancer in Rats

Breast cancer is the most predominant cause of death in women globally. The current study was performed to evaluate the possible protective role of wheat germ oil (WGO), wheat germ powder (WGP), and vitamin E (Vit E) against breast carcinoma induced by the environmental carcinogen 7,12-dimethylbenz[a]anthracene (DMBA) in Sprague Dawely albino rats. Eighty female rats were divided into eight groups, each of ten rats. All protective agents were taken 21 days prior to DMBA treatment. Group I served as the normal control. Group II received Vit E (100 mg/kg BW/d) by gavage. Group III was fed a 20% WGP enriched basal diet. Group IV received WGO (270 mg/kg BW/d) by gavage. Group V received DMBA (50 mg/kg body weight/subcutaneous injection). Group VI received Vit E + DMBA. Group VII received WGP + DMBA. Group VIII received WGO + DMBA. The investigation focused on bodyweights, complete blood picture (CBC), cancer antigen 15.3 (CA15.3), superoxide dismutase (SOD), catalase (CAT), malondialdehyde (MDA), and histopathological and immunohistochemical analyses. Results showed that all cancer protective agents significantly improved CBC parameters, proliferating cell nuclear antigen (PCNA), and the histopathology picture, with the best improvement in the WGO group. In addition, WGO, WGP, and Vit E decreased the CA15.3 and MDA levels and elevated both the SOD and CAT levels compared to the DMBA group. Consequently, supplementation with WGO, WGP, and Vit E protects against lipid peroxidation and oxidative stress and reduces breast cancer.

Oral administration of tartrazine (E102) accelerates the incidence and the development of 7,12-dimethylbenz(a) anthracene (DMBA)-induced breast cancer in rats

BACKGROUND

Despite the considerable advances made in the treatment of cancer, it remains a global threat. Tartrazine (E102) is a synthetic dye widely used in food industries; it has recently been shown to induce oxidative stress (a well known risk factor of cancer) in rat tissues. The present work therefore aimed to assess the impact of a regular consumption of tartrazine on the incidence of breast cancer in rats.

METHODS

Forty (40) Wistar rats aged 55 to 60 days were randomly assigned into 5 groups (n = 8) including two groups serving as normal controls and receiving distilled water (NOR) or tartrazine (NOR + TARZ). The three remaining groups were exposed to the carcinogen DMBA (50 mg/kg) and treated for 20 weeks with either distilled water (DMBA), tartrazine 50 mg/kg (DMBA + TARZ) or a natural dye (DMBA + COL). The parameters evaluated were the incidence, morphology and some biomarkers (CA 15-3, estradiol and α-fetoprotein) of breast cancer. The oxidative status and histomorphology of the tumors were also assessed.

RESULTS

A regular intake of tartrazine led to an early incidence of tumors (100% in rats that received TARZ only vs 80% in rats that received DMBA only), with significantly larger tumors (p < 0.001) (mass = 3500 mg/kg and volume = 4 cm3). The invasive breast carcinoma observed on the histological sections of the animals of the DMBA + TARZ group was more developed than those of the DMBA group. The increase in serum α-fetoprotein (p < 0.05) and CA 15-3 (p < 0.01) levels corroborate the changes observed in tumors. The presence of oxidative activity in animals of the DMBA + TARZ group was confirmed by a significant decrease (p < 0.001) in the activity of antioxidant enzymes (SOD and catalase) as well as the level of GSH and increase in the level of MDA compared to the rats of the DMBA and NOR groups.

CONCLUSION

Tartrazine therefore appears to be a promoter of DMBA-induced breast tumorigenesis in rats through its oxidative potential. This work encourages further studies on the mechanisms of action of tartrazine (E102) and its limits of use.