Inhibition test of heme detoxification (ITHD) as an approach for detecting antimalarial agents in medicinal plants
Authors
Abstract:
Background and objectives: There are several methods to assess the in vitro capability of heme inhibitory activity of antimalarial compounds; most of them require some specific equipment or toxic substances and sometimes the needed materials are not accessible. Regarding the necessity and importance of optimizing and standardizing experimental conditions, the present study has intended to improve the in vitro assessment conditions of the β-hematin formation inhibitory activity for screening herbal samples. Methods: Hemin, tween 20, and samples (9:9:2) were incubated in different conditions including: hemin concentration (30, 60, and 120 µg/mL), duration (4, 24, 48, and 72 h), pH of buffer (3.6, 4, 4.4, 4.8, and 5), and temperature (37 and 60 °C) in 96-well plates. Also, a total of 165 plant extracts and fractions were tested in the most suitable conditions. Results: The reaction time and the incubation temperature were determined as the critical factors. The effective conditions for β-hematin formation were found to be 60 °C after 24 h incubation. In this method, proper correlations with respect to negative (69%) and positive (67%) predictive values were obtained in comparison with the anti-plasmodial assay. Antimalarial activities of Pistacia atlantica, Myrtus communis, Pterocarya fraxinifolia, and Satureja mutica were found to correlate significantly with inhibition of the heme detoxification assay. Conclusion: These results support a rapid, simple and reliable approach for selecting and identifying a number of herbs for further related antimalaria investigations.
similar resources
Inhibition of Heme Polymerization, the Mechanism of Antimalarial Activity in Phlomis caucasica Rech.f. (Lamiaceae)
Background: Malaria is one of the most important parasitic diseases in the world caused by Plasmodium species. The malaria parasite digests hemoglobin in vacuole to amino acids and heme. Plasmodium has got several detoxification mechanisms to protect itself from toxic heme. The most important mechanism is heme polymerization. Identifying compounds that inhibit heme polymerization is an approach...
full textMedicinal Plants as Anti-Ulcer Agents
Peptic ulcer disease (PUD) is considered as one of the common diseases in the world. Treatment of peptic ulcer with synthetic drugs such as proton pump inhibitors, H2 receptor antagonists and other non-steroidal anti-inflammatory drugs has shown adverse effects, relapses, drug interactions. Medicinal plants containing active chemical constituents are useful in prevention and treatment of variou...
full textAntimalarial activity of three Pakistani medicinal plants.
This study was conducted to determine the in vitro anti-malarial activity of three medicinal plants, Picrorhiza kurroa, Caesalpinia bonducella and Artemisia absinthium of Pakistan. Different extracts of various parts of these plants were prepared by maceration and percolation, and were evaluated for their antimalarial activity. Aqueous, cold alcoholic and hot alcoholic extracts of Picrorhiza ku...
full textMedicinal Plants Used as Antitumor Agents in Brazil: An Ethnobotanical Approach
WE DESCRIBE THE MEDICINAL PLANTS THAT HAVE BEEN REPORTED TO BE ANTITUMOR AGENTS AND THAT HAVE BEEN USED IN ETHNOBOTANIC RESEARCH IN BRAZIL TO ANSWER THE FOLLOWING QUESTIONS: what is the abundance of plants reported to be antitumor in Brazil? Have the plant species used for tumor treatment in traditional Brazilian medicine been sufficiently examined scientifically? Our analysis included papers p...
full textMy Resources
Journal title
volume 5 issue 1
pages 5- 11
publication date 2018-01-01
By following a journal you will be notified via email when a new issue of this journal is published.
Hosted on Doprax cloud platform doprax.com
copyright © 2015-2023