Irvingia gabonensis fat: nutritional properties and effect of increasing amounts on the growth and lipid metabolism of young rats wistar sp

<p>Abstract</p> <p>Background</p> <p>Dietary saturated fatty acids (SFAs) are generally considered to increase plasma cholesterol. It has also been claimed that they increase cardio-vascular disease, although the claim that some of SFAs can increase HDL-cholesterol is poorly documented. <it>Irvingia gabonensis </it>kernels after being dried and crushed they are generally used to prepare a sticky and aromatic soup very much consumed in Cameroun and West Africa countries. This study was therefore aimed at evaluating the effects of dika nut fat on the growing and lipids metabolism of young rats.</p> <p>Method</p> <p>For The nutritional evaluation related to the performances of growth and the analysis of increasing amounts of dika nut fat (0; 5.1; 7.34 and 13.48%) in young rats of <it>wistar sp</it>. The animals were taken individually out of metabolic cage for each ration 5 repetitions per sex (males and females) were carried out.</p> <p>Results</p> <p>The results obtained during the 3 weeks of treatment shows that the performances of consumption were positive. A highly significant increase (P < 0,01) of serum cholesterol and triglycerides in the high dose fat groups (13,48%) of dika fat were observed compared to control groups. However, this rise of cholesterol is due to that of HDL-cholesterol without any change in the quantity of LDL-Receptor. In parallel, the weight of the vital organ did not vary much compared to control, except for males where we observed a significantly reduction (P < 0,01) in the weight of the liver for the three diet tests.</p> <p>Conclusion</p> <p>This study shows that the increasing amount of dika nut fat alter significantly cholesterol and triglyceride at high dose diet, but also increase HDL-cholesterol.</p

EFFECT OF THE AQUEOUS EXTRACT OF JUSTICIA INSULARIS T. ANDERS (ACANTHACEAE) ON OVARIAN FOLLICULOGENESIS AND FERTILITY OF FEMALE RATS

Justicia insularis T. Anders (Acanthaceae) is a medicinal plant whose leaves and those of three other plants are mixed for the preparation of a concoction used to improve fertility and to reduce labour pains in women of the Western Region of Cameroon. Previous studies have demonstrated the inducing potential on ovarian folliculogenesis and steroidogenesis of the aqueous extract of the leaf mixture (ADHJ) of four medicinal plants (Aloe buettneri, Dicliptera verticillata, Hibiscus macranthus and Justicia insularis) among which the later represented the highest proportion. This study was aimed at evaluating the ovarian inducing potential of J. insularis in immature female rats. Various doses of the aqueous extract of J. insularis were daily and orally given, for 20 days, to immature female rats distributed into four experimental groups of twenty animals each. At the end of the experimental period some biochemical and physiological parameters of ovarian function were assayed. The administration of the aqueous extract of Justicia insularis significantly induced an early vaginal opening in all treated groups (P < 0.001) as well as an increase (at doses of 50 or 100 mg/kg) in the number of hemorrhagic points, Corpus luteum, implantation sites, ovarian weight, uterine and ovarian proteins. Ovarian cholesterol level (P < 0.05) significantly decreased in animals treated with the lowest dose (12.5 mg/kg). The evaluation of the toxicological effects of the extract on pregnancy showed that it significantly increased pre- and post-implantation losses, resorption index and decreased the rate of nidation as well as litter’s weight. These results suggest that the aqueous extract of Justicia insularis induces ovarian folliculogenesis thus justifying its high proportion in the leaf mixture of ADHJ

Insecticidal effects of the powdery formulation based on clay and essential oil from the leaves of Clausena anisata (Willd.) J. D. Hook ex. Benth. (Rutaceae) against Acanthoscelides obtectus (Say) (Coleoptera: Bruchidae)

The bioefficacies of essential oil and aromatized clay powder based on the mixture of clay and essential oil extracted from Clausena anisata were evaluated for their insecticidal activities and their effects on progeny production of Acanthoscelides obtectus. Contact toxicity assayed by coating on bean grains showed that these chemicals caused significant mortality of the test insect. Beetle mortality was dose dependant and after 2-day exposure the aromatized clay powder was more toxic (LD50 = 0.069 mu l/g grain) than the pure essential oil (LD50 = 0.081 mu l/g grain). There was, however, a highly significant loss of toxicity after 24 and 36 h following treatment with essential oil and aromatized powder, respectively. Both aromatized clay powder and pure essential oil considerably reduced the F-1 progeny insect production. The essential oil evoked moderated repellent action and high fumigant toxicity (LC50 = 0.093 mu l/cm(3)) against adults of A. obtectus. These results suggest that the clay powder could be used to stabilize the essential oil to increase its efficacy for use as an alternative to synthetic insecticides

Anti-androgenic, anti-oestrogenic and antioxidant activities of aqueous extract of Laportea ovalifolia on adults rats.

Cancer is one of the most life-threatening diseases in which deregulating proliferation of abnormal cells invades and disrupts surrounding tissues. It constitutes seriouspublic health problems in both developed and developing countries.To evaluate the anti-androgenic, anti-estrogenic and antioxidant activities of Laportea ovalifolia (L. ovalifolia) in order to contribute to the search and the valorization of medicinal plants which could reduce mortality related to prostate cancer.The evaluation of the anti-androgenic activity were carried out on castrated male rats receiving simultaneous daily administration of testosterone and different doses of aqueous extract of L. Ovalifolia during a period of 10 days. That of the anti-estrogenic activity was carried out on mature ovariectomized female rats receiving for a week simultaneous daily administration of estradiol and different doses of plant extract. The evaluation of the in vivo antioxidant activity of L. Ovalifolia aqueous extract was carried on adult male rats receiving simultaneous daily administration of naphthalene and different doses of extract, for 15 days. For its in vitro antioxidant activity, the amounts of phenolic compounds in plant extracts were determined as well as the total flavonoid contents of the crude extracts. Also, the DPPH scavenging activity of the plant extract was determined as well as its reducing power.As compare to the 0 mg/kg testosterone primed castrated rat, those treated with the various dose of the plant extract presented either a significant decrease in weights of all their reproductive tissues (P˂0.01 - P˂0.001) or a significant increase (P˂0.001) in their serum level of testosterone. For all the plant extract treated ovariectomized rats, similar trends were observed for the relative uteri weight (P˂0.01) and that of the serum level of estradiol (P˂0.001). Plant extract contains 13.33±0.1 mg GAE/g and 05.27±0.17 mg CATE/g of phenolic and flavonoids compounds respectively and exhibits DPPH radical scavenging ability as well as ferric-reducing antioxidant power. Relatively to animals treated at 0 mg/kg, the various doses of the plant extract significantly increased (P˂0.05 - P˂0.001) the activity of catalase (in liver, lungs and the serum), SOD (in liver and heart) and peroxidase (in liver, heart, serum and lungs). It also significantly reduces (P˂0.001) the level of nitric oxide in the liver, heart, lungs, kidneys and serum.Globally, these results denote the anti-androgenic, anti-estrogenic and antioxidant potential of L. ovalifolia. 

Anti-androgenic, anti-oestrogenic and antioxidant activities of aqueous extract of Laportea ovalifolia on adults rats.

Cancer is one of the most life-threatening diseases in which deregulating proliferation of abnormal cells invades and disrupts surrounding tissues. It constitutes seriouspublic health problems in both developed and developing countries.To evaluate the anti-androgenic, anti-estrogenic and antioxidant activities of Laportea ovalifolia (L. ovalifolia) in order to contribute to the search and the valorization of medicinal plants which could reduce mortality related to prostate cancer.The evaluation of the anti-androgenic activity were carried out on castrated male rats receiving simultaneous daily administration of testosterone and different doses of aqueous extract of L. Ovalifolia during a period of 10 days. That of the anti-estrogenic activity was carried out on mature ovariectomized female rats receiving for a week simultaneous daily administration of estradiol and different doses of plant extract. The evaluation of the in vivo antioxidant activity of L. Ovalifolia aqueous extract was carried on adult male rats receiving simultaneous daily administration of naphthalene and different doses of extract, for 15 days. For its in vitro antioxidant activity, the amounts of phenolic compounds in plant extracts were determined as well as the total flavonoid contents of the crude extracts. Also, the DPPH scavenging activity of the plant extract was determined as well as its reducing power.As compare to the 0 mg/kg testosterone primed castrated rat, those treated with the various dose of the plant extract presented either a significant decrease in weights of all their reproductive tissues (P˂0.01 - P˂0.001) or a significant increase (P˂0.001) in their serum level of testosterone. For all the plant extract treated ovariectomized rats, similar trends were observed for the relative uteri weight (P˂0.01) and that of the serum level of estradiol (P˂0.001). Plant extract contains 13.33±0.1 mg GAE/g and 05.27±0.17 mg CATE/g of phenolic and flavonoids compounds respectively and exhibits DPPH radical scavenging ability as well as ferric-reducing antioxidant power. Relatively to animals treated at 0 mg/kg, the various doses of the plant extract significantly increased (P˂0.05 - P˂0.001) the activity of catalase (in liver, lungs and the serum), SOD (in liver and heart) and peroxidase (in liver, heart, serum and lungs). It also significantly reduces (P˂0.001) the level of nitric oxide in the liver, heart, lungs, kidneys and serum.Globally, these results denote the anti-androgenic, anti-estrogenic and antioxidant potential of L. ovalifolia.