By Gabriel Olawale

Stakeholders in drug production have been advised to collaborate and review administrative processes and the approach leading to the identification of plants, scientific research, development as well as approval of remedies and drug production from Nigerian herbs and plants.

Making the call in a public lecture by Bevekt Gedu Chemical Company to mark his 80th birthday, professor emeritus at the Department of Chemistry, University of Ibadan, Emeritus Prof. Joseph Okogun, discussed plants as unrivaled organic chemical factories producing useful chemicals that man exploits for various purposes and the reasons why the natural chemistry of plants is important to healthy living.

File: Drugs

The lecture was entitled: Active, Bitter and Sweet – A lifetime of Research on Plants, Anti-Cancer Remedies and Drug Discovery.

Okogun spoke on a variety of active ingredients that have been discovered from every day leaves and fruits found in Nigeria and West Africa that can either treat or manage a lot of common ailments in Nigeria and elsewhere at affordable cost.

“There are organic and natural remedies for the management of various diseases including cancer and HIV/AIDS using several decades of data from scientific research on plants by Bevekt Gedu. Out of Bevekt Gedu’s work, a pure compound initially obtained from a Nigerian plant which has been adopted and about to be finalised for drug development as a blockbuster drug by IMI of USA. This is an indication that opportunities for long-lasting and sustainable investments are abundant locally,” Okogun said.

At the event chaired by Engr. Adama Okoene, former MD, Midwestern Oil and attended by healthcare professionals, academicians and other professionals from public and private sectors, he explained the extraction, isolation, analysis and modification of active natural products for potential drug leads or drugs and molecular probes; and the role of different professionals in the process of drug discovery.

“Plant materials are usually processed and powdered for extraction with solvents of various polarities so that different types of compounds are extracted by the different solvents. The solvents range from gases (carbon dioxide and hydrocarbon) in supercritical fluid states, petroleum ether through ethanol to water. For instance, the removal of solvent, the usually dark brown gum is separated into the component compounds in the mixture using various chromatographic methods with or without bioactivity screening depending on the nature of the targeted compounds.”

He explained that biological activity screening is done by pharmacognosists, pharmaceutical chemists, pharmacologists, biochemists and microbiologists to identify potential drugs and other biologically active compounds including pesticides. Toxicologists determine the toxicity including teratogenicity of identified potential drugs.

“When biologically active compounds are identified, there may be need to improve on the activity and or toxicity by modifying the structures using chemistry linked with biology.