Research Article

Inhibition of monoamine oxidase A (Mao-A) enzyme by some medicinal herbs

Volume: 13 Number: 1 March 9, 2026
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Inhibition of monoamine oxidase A (Mao-A) enzyme by some medicinal herbs

Abstract

Monoamine oxidase (MAO) is a flavin-containing enzyme responsible for the metabolism and regulation of neurotransmitter amines and plays a role in neuropsychiatric disorders such as depression and mania. In this study, the inhibitory effects of different concentrations of solutions prepared using distilled water, ethanol, ethyl acetate, petroleum ether, and mixed extracts of Hypericum perforatum, Ginkgo biloba , Lavandula angustifolia, Zingiber officinale, Tilia tomentosa., Cinnamomum aromaticum, Menthae piperita, Thymus cherlerioides, Portulaca oleracea, Trachystemon orientalis, Allium sativum, Petroselinum crispum, and Spinacia oleracea were investigated on monoamine oxidase obtained from rat liver. It was determined that the best inhibitor plant extract for MAO, which has a value of IC₅₀, was 0.071 mg/mL and with a ratio of inhibition of 70.15% ethanol extract of Hypericum perforatum. Following H. perforatum, the best inhibition effects were observed with the ethanol extract of Spinacia oleracea (IC₅₀ = 0.074 mg/mL), Ginkgo biloba (IC₅₀ = 0.075 mg/mL), Allium sativum (IC₅₀ = 0.080 mg/mL), and the distilled water extract of H. perforatum (IC₅₀ value of 0.081 mg/mL), respectively. The findings demonstrate that these species can inhibit the enzyme, highlighting their potential as therapeutic agents for neurological disorders.

Keywords

Supporting Institution

The Scientific Research Projects Commission of Balikesir University.

Ethical Statement

Uludağ University Local Ethics Committee for Animal Experiments and Uludağ University Faculty of Medicine Laboratory Animal Breeding Application and Research Center, 2013 - 05/06.

References

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Details

Primary Language

English

Subjects

Pharmaceutical Botany

Journal Section

Research Article

Early Pub Date

January 19, 2026

Publication Date

March 9, 2026

Submission Date

September 12, 2025

Acceptance Date

January 1, 2026

Published in Issue

Year 2026 Volume: 13 Number: 1

APA
Güngör, N., Doğan, S., Alan, Ü., Diken, M. E., & Bayhan, H. (2026). Inhibition of monoamine oxidase A (Mao-A) enzyme by some medicinal herbs. International Journal of Secondary Metabolite, 13(1), 315-328. https://doi.org/10.21448/ijsm.1778158
AMA
1.Güngör N, Doğan S, Alan Ü, Diken ME, Bayhan H. Inhibition of monoamine oxidase A (Mao-A) enzyme by some medicinal herbs. Int. J. Sec. Metabolite. 2026;13(1):315-328. doi:10.21448/ijsm.1778158
Chicago
Güngör, Nurten, Serap Doğan, Ümran Alan, Mehmet Emin Diken, and Hamza Bayhan. 2026. “Inhibition of Monoamine Oxidase A (Mao-A) Enzyme by Some Medicinal Herbs”. International Journal of Secondary Metabolite 13 (1): 315-28. https://doi.org/10.21448/ijsm.1778158.
EndNote
Güngör N, Doğan S, Alan Ü, Diken ME, Bayhan H (March 1, 2026) Inhibition of monoamine oxidase A (Mao-A) enzyme by some medicinal herbs. International Journal of Secondary Metabolite 13 1 315–328.
IEEE
[1]N. Güngör, S. Doğan, Ü. Alan, M. E. Diken, and H. Bayhan, “Inhibition of monoamine oxidase A (Mao-A) enzyme by some medicinal herbs”, Int. J. Sec. Metabolite, vol. 13, no. 1, pp. 315–328, Mar. 2026, doi: 10.21448/ijsm.1778158.
ISNAD
Güngör, Nurten - Doğan, Serap - Alan, Ümran - Diken, Mehmet Emin - Bayhan, Hamza. “Inhibition of Monoamine Oxidase A (Mao-A) Enzyme by Some Medicinal Herbs”. International Journal of Secondary Metabolite 13/1 (March 1, 2026): 315-328. https://doi.org/10.21448/ijsm.1778158.
JAMA
1.Güngör N, Doğan S, Alan Ü, Diken ME, Bayhan H. Inhibition of monoamine oxidase A (Mao-A) enzyme by some medicinal herbs. Int. J. Sec. Metabolite. 2026;13:315–328.
MLA
Güngör, Nurten, et al. “Inhibition of Monoamine Oxidase A (Mao-A) Enzyme by Some Medicinal Herbs”. International Journal of Secondary Metabolite, vol. 13, no. 1, Mar. 2026, pp. 315-28, doi:10.21448/ijsm.1778158.
Vancouver
1.Nurten Güngör, Serap Doğan, Ümran Alan, Mehmet Emin Diken, Hamza Bayhan. Inhibition of monoamine oxidase A (Mao-A) enzyme by some medicinal herbs. Int. J. Sec. Metabolite. 2026 Mar. 1;13(1):315-28. doi:10.21448/ijsm.1778158
International Journal of Secondary Metabolite

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