Hydroethanolic extract of Piliostigma thonningii leaves extenuates the severity of diarrhoea in female Wistar rats

OBJECTIVES

Nigeria ranks second in the global prevalence of diarrhoea with most cases concentrated in the Northern-region of the country. This research explored the antidiarrhoeal efficacy of the hydroethanolic extract of Piliostigma thonningii leaves (HEPTL), locally used to manage diarrhoeal conditions in Kebbi State, Nigeria.

METHODS

P. thonningii leaves were screened for their secondary metabolites and mineral constituents. Using 3 standard-diarrhoea models, female Wistar rats completely-randomised into six-groups of six animals each were utilised for probing the antidiarrhoeal activity of HEPTL. Animals in groups I and II served as the negative and positive controls, whereas the rats in groups III, IV and V respectively received 50, 100, and 200 mg/kg body weight-(bw) of HEPTL.

RESULTS

Six secondary metabolites and eight minerals were found in the extract, with flavonoids and calcium being the most abundant while steroids and zinc were the least prevalent, respectively. High performance liquid chromatographic analysis revealed the presence of 19 bioactive substances. Furthermore, there was a significant (p<0.05) and dose-related reduction in diarrhoea onset, water content, and wet faeces count. Similarly, the amount of intestinal fluid and average distance traversed by the charcoal-meal were decreased dose-dependently by the HEPTL with a commensurate rise in the suppression of intestinal fluid accrual and peristalsis. Acetylcholinesterase, Na+/K+-ATPase, reduced glutathione, intestinal-alkaline phosphatase and protein levels increased significantly (p<0.05) whereas superoxide-dismutase, catalase, intestinal-nitric oxide and malondialdehyde levels all fell significantly (p<0.05). However, the level of intestinal glucose was not significantly altered.

CONCLUSIONS

Overall, the HEPTL exhibited a profound effect in the alleviation of the severity of diarrhoea, notably at 200 mg/kg bw.

Ethnopharmacological Survey of Plants Used for the Treatment of Female Sexual Dysfunction and Infertility in Ilorin, Nigeria

Over generations, several indigenous knowledge on the use of medicinal plants have been lost due to a lack of interest of the upcoming generation and reluctancy of the older generations to pass on their knowledge. This survey was set about to preserve and share the knowledge of the Ilorin Emirate Clan in the management of female sexual dysfunction and infertility (FSDI). The survey was conducted across three major markets (Shao, Jimba-Oja and Oke-Oyi) and ethnobotanical data on medicinal plants, mode of preparation, route of administration and demographic information were collected from volunteers using a semi-structured questionnaire, oral or virtual interviews. A total of 47 plant species belonging to 28 families were identified from 85 willing respondents. Phyllanthus amarus Schumach. & Thonn. was the most frequently cited plant with a citation frequency of 31.76% and a fidelity level of 57.75% whereas Xylopia aethiopica (Dunal) A.Rich. was the least cited plant with a citation frequency of 1.18% and a fidelity level of 1.12%. The highest informant consensus factor computed for Shao market, Jimba-Oja and Oke-Oyi were 0.93, 0.57 and 0.84 for P. amarus, Sarcocephalus latifolius (Sm.) E.A.Bruce and Cassia fistula L., respectively. This study provides a comprehensive insight into the medicinal plants in our society that are of importance in the management of female sexual dysfunction and infertility. The data collected would promote the conservation of invaluable indigenous knowledge and highlight a broad selection of medicinal plants that could be subjected to further pharmacological and clinical investigation for their potential role in the treatment of FSDI.

Traditional medicinal plants used for treating emerging and re-emerging viral diseases in northern Nigeria

Introduction

For decades, viral diseases have been treated using medicinal plants and herbal practices in the northern part of Nigeria. Though scarcely investigated, these medicinal plants could serve as potential sources for novel antiviral drugs against emerging and remerging viral diseases. Therefore, this study is aimed at investigating the medicinal practices and plants used to treat emerging and re-emerging viral diseases including hepatitis, poliomyelitis, monkeypox, smallpox, yellow fever, Lassa fever, meningitis, and COVID-19 in some northern states; Katsina, Kebbi, Kwara and Sokoto states.

Method

Administered questionnaires and oral interviews were used to collect information on medicinal plants, method of preparation of herbal formulations, diagnosis, and treatment of viral diseases. Medicinal plants were collected, botanically identified, and assigned voucher numbers. The plant names were verified using www.theplantlist.org, www.worldfloraonline.org and the international plant names index.

Result

A total of 280 participating herbal medicine practitioners (HMPs) mentioned 131 plants belonging to 65 families. Plant parts such as roots, bark, leaf, seed, and fruit were prepared as a decoction, concoction, infusion, or ointment for oral and topical treatment of viral diseases. Moringa oleifera (75.3%), Elaeis guineensis Jacq. (80%), and Acacia nilotica (70%) were the most frequently mentioned plants in Kebbi, Kwara and Sokoto states, respectively.

Conclusion

The study revealed scarcely investigated and uninvestigated medicinal plants used to treat hepatitis, poliomyelitis, monkeypox, smallpox, yellow fever, Lassa fever, meningitis, and COVID-19. Future studies should be conducted to determine the antiviral potency and isolate novel bioactive agents from these plants against viral diseases.