Biography
Norma Rivera DVM, PhD, is a Professor in the Department of Microbiology and Parasitology, Faculty of Medicine at UNAM. She works in the field of medical parasitology studying the problems associated with the treatment and control of parasitic diseases that are still major health problem in many countries around the World. Her research interests include the evaluation of synthetic compounds and natural products with antiprotozoal activity and the pathogenesis of Malaria and Toxoplasmosis.
Abstract
Hintonia latiflora (Hl) stem bark infusions are use in some rural communities of Mexico to treat malaria, diabetes and gastrointestinal diseases. The efficacy of Hl stem bark methanolic extract (HlMeOHe) in CD1 male mice infected with Plasmodium yoelii yoelii (Pyy) was tested. A 4-day test scheme was used. Oral doses of 1,200, 600, and 300 mg/kg were evaluated; oral chloroquine was used as positive control. Transmission electron microscopy (TEM) was used to identify ultrastructural changes on the asexual intraerythrocytic stages of Pyy treated with HlMeOHe. None treated Pyy-infected mice died between 6 and 7 days post-infection (PI) with parasitemia over 70%. Pyy-infected mice treated with 600 and 300 mg/kg showed a chemosuppression percentage of total parasitemia of 99.23 and 23.66, respectively, animals in both groups died 6 to 7 days PI with parasitemia over 45%. 1,200 mg/kg of the extract showed, in the Pyy-infected mice, a 100% chemosuppression of total parasitemia on 5 days PI and a 23 days survival time with a mean parasitemia of 23.6% at the date of death. Maximum extract dose decreases mice temperature up to 3C. TEM images showed morphological changes of parasite death. The results obtained in this study showed that the infection outcome of Pyy-infected mice is affected by HlMeOHe. Although the stem bark of Hl showed efficacy to treat murine malaria, its chemical composition and toxicity should be studied in detail for the benefit of those who consume it.
Biography
Hailiang Lu Currently working as an Supervisor at Infinitus (China) Co. Ltd, China. he has published more than 20 papers in reputed journals.
Abstract
Oriental medicinal plants are widely used in folk medicine as natural healing remedies with therapeutic effects such as prevention of local infection, inflammation disorders, skin itching or enhancing wound healing. In this study, a recipe, named as Balm Total, was developed as a personal care product base to deliver a range of benefits, including antimicrobial, anti-inflammatory, itching-relieving and wound-healing. It involves the use of several herbal extracts, such as Glycyrrhiza glabra, Sophora flavescens, Polygonum cuspidatum, Mentha haplocalyx and Origanum vulgare. Balm Total was found to prevent the growth of microorganisms yeast (Candida albicans), gram-negative (Pseudomonas aeruginosa and Escherichia coli) and gram-positive bacteria (Staphylococcus aureus). The bacteriostatic rates on both the bacteria and yeast were above 99%, showing promising antibacterial and antifungal activities. In the xylene-induced ear-swelling test in mice, Balm Total suppressed the ear swelling (p<0.05). The licking response induced by 4-aminopyridine was significantly reduced by 66.8% (p<0.01). A rabbit ear trauma model was used to evaluate the performance of Balm Total. Percentage of wound area reduction (PWAR) of total number of wounds at Day 5 and Day 11 was 25% and 98%, respectively (p<0.01). Wound healing rate was 33.3% at Day 5 and 75% at Day 11 (p<0.05). The pathological examination demonstrated that at Day 11, the vascularized area was significantly larger in Balm Total treated group than in blank control, fibroblast proliferation was activated and the epidermis demonstrated thickening of stratum spinosum. These results suggest that Balm Total has antimicrobial, anti-inflammatory and antipruritic effects, and could accelerate wound healing